WO2023095572A1

WO2023095572A1 - Hypochlorous acid water treatment device and space disinfection system using same

Info

Publication number: WO2023095572A1
Application number: PCT/JP2022/040881
Authority: WO
Inventors: 充彦植田
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2021-11-26
Filing date: 2022-11-01
Publication date: 2023-06-01

Abstract

A hypochlorous acid water treatment device (1) according to the present disclosure comprises: a first flow path (13) along which positive electrode (2) extends and is exposed; a second flow path (14) which is provided in parallel to the first flow path (13) oppositely therefrom, and along which a negative electrode (3) extends and is exposed; a barrier film (4) which is provided so as to separate the first flow path (13) and the second flow path (14), and through which positive ions that are contained in a solution flowing through the flow paths can pass; and a power source (15) which applies a voltage between the positive electrode (2) and the negative electrode (3). The first flow path (13) and the second flow path (14) are configured such that a first solution that flows through the first flow path (13) and a second solution that flows through the second flow path (14) flow in the same direction. At least the first solution is hypochlorous acid water produced by electrolysis of salt water.

Description

Hypochlorous acid water treatment equipment and space sterilization system using the same

This disclosure relates to a hypochlorous acid water treatment device and a space sterilization system using the same.

Conventionally, by electrolyzing salt water, hypochlorous acid water containing NaClO as the main component and containing HClO and NaOH is generated. Hypochlorous acid water is known to improve its sterilization power by making it weakly acidic. Techniques for side control are known. (See Patent Document 1, for example).

JP-A-8-164392

However, it cannot be said that NaClO and NaOH, which are residual components, are sufficiently suppressed only by adjusting the pH to be weakly acidic. NaClO and NaOH are components that remain as solids on the surface of the hypochlorous acid water after volatilization, and these residual components deliquesce and re-dissolve in water, thereby promoting metal corrosion. Therefore, when hypochlorous acid water containing a large amount of NaClO and NaOH components is mist-sprayed, fine residual components are accumulated, and there is a problem of corrosion during long-term use.

In addition, when tap water is used as raw water to generate salt water, there is concern that anions contained in the tap water may cause variations in concentration and characteristics of hypochlorous acid water generated by electrolysis. In addition, cations contained in tap water are components that remain as solids on the surface after volatilization, and these residual components also promote corrosion of metals, so there is also concern about corrosion during long-term use. There was a problem that

Therefore, the purpose of the present disclosure is to provide a hypochlorous acid water treatment device capable of producing hypochlorous acid water with reduced residual components generated by electrolysis of salt water and a space sterilization system using the same. and

The hypochlorous acid water supply device according to the present disclosure includes a first flow channel in which the positive electrode is exposed along the flow channel, and a first flow channel arranged in parallel to face the first flow channel, and a negative electrode in the flow channel. a second flow path extending along and exposed along, a diaphragm separating the first flow path and the second flow path and allowing cations contained in the solution flowing through the flow path to permeate, a positive electrode and a negative electrode. and a power source for applying a voltage between the electrodes. The first flow channel and the second flow channel are configured so that the first solution flowing through the first flow channel and the second solution flowing through the second flow channel both flow in the same direction, and at least the first solution has a structure of hypochlorous acid water generated by electrolyzing salt water.

In addition, the hypochlorous acid water supply device according to the present disclosure continuously supplies hypochlorous acid water by energizing between the pair of first cathode and cathode electrodes from salt water supplied in the meandering membrane-free electrolytic flow path. The hypochlorous acid water generating unit to be electrolytically generated and the hypochlorous acid water supplied from the hypochlorous acid water generating unit to each of the meandering membrane electrolysis flow paths are supplied between the pair of second negative and positive electrodes. A hypochlorous acid water treatment unit that continuously treats by energization may be provided. A structure may be adopted in which the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is supplied to the outside.

In addition, the hypochlorous acid water supply apparatus according to the present disclosure includes a meandering electrolysis flow path configured to be able to supply salt water, and a diaphragm-free electrolysis flow path forming the front stage of the electrolysis flow path. Hypochlorous acid water generation unit that continuously electrolytically generates hypochlorous acid water by energizing between a pair of negative and positive electrodes, and hypochlorous acid A hypochlorous acid water treatment unit for continuously treating the hypochlorous acid water supplied from the chlorate water generation unit by energizing between the pair of negative and positive electrodes may be provided. A structure may be adopted in which the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is supplied to the outside.

In addition, the spatial sterilization system according to the present disclosure is connected to the above-described hypochlorous acid water supply device and the first flow path, and uses hypochlorous acid water delivered from the first flow path. A sterilization device that emits water mist into a predetermined space may be provided.

Further, in the hypochlorous acid water supply apparatus according to the present disclosure, the negative electrode contained in the tap water is supplied from the tap water supplied into the meandering first diaphragm electrolysis flow path to the pair of first negative and positive electrodes by energizing the tap water. A tap water treatment unit that continuously separates ion components, a salt water generation unit that generates salt water by adding a salt component to the tap water solution sent from the tap water electrolysis channel on the negative electrode side of the tap water treatment unit, and the salt water. A meandering electrolysis flow path configured to be able to supply salt water generated in the generation unit, and a flow path from the salt water supplied in the non-diaphragm electrolysis flow path forming the front stage of the electrolysis flow path to between the pair of second cathode and cathode electrodes. From the hypochlorous acid water generation unit to each of the hypochlorous acid water generation unit that electrolytically generates hypochlorous acid water continuously by energization and the second membrane electrolysis flow path that constitutes the latter stage of the electrolysis flow path. a hypochlorous acid water treatment unit for continuously treating the supplied hypochlorous acid water by energizing between the pair of second cathode and cathode electrodes. The structure is such that the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is supplied to the outside.

In addition, the spatial sterilization system according to the present disclosure includes the above-described hypochlorous acid water supply device and, as an external device, hypochlorous acid water sent from the electrolytic flow path on the positive electrode side of the hypochlorous acid water treatment unit. and a sterilization device that emits hypochlorous acid water mist into a predetermined space using.

According to the present disclosure, it is possible to provide a hypochlorous acid water treatment apparatus capable of producing hypochlorous acid water with reduced residual components generated by electrolysis of salt water, and a space sterilization system using the same. can.

FIG. 1 is a schematic diagram of a hypochlorous acid water treatment apparatus according to Embodiment 1-1 of the present disclosure. FIG. 2 is an exploded perspective view of a hypochlorous acid water treatment apparatus according to Embodiment 1-1. FIG. 3 is a vertical cross-sectional image diagram of the hypochlorous acid water treatment apparatus according to Embodiment 1-1. FIG. 4 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment apparatus according to Embodiment 1-1. FIG. 5A is a diagram showing the relationship between the characteristics of hypochlorous acid water flowing through the hypochlorous acid water treatment apparatus according to Embodiment 1-1 and the electrodialysis time. FIG. 5B is a diagram showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water treatment apparatus according to Embodiment 1-1 and the electrodialysis time. FIG. 5C is a diagram showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water treatment apparatus according to Embodiment 1-1 and the electrodialysis time. FIG. 6 is a schematic diagram of a spatial sterilization system using a hypochlorous acid water treatment apparatus according to Embodiment 1-2 of the present disclosure. FIG. 7 is a cross-sectional image diagram of a hypochlorous acid water supply device according to Embodiment 2-1 of the present disclosure. FIG. 8 is a schematic diagram of a hypochlorous acid water generating unit according to Embodiment 2-1. FIG. 9 is an exploded perspective view of a hypochlorous acid water generating unit according to Embodiment 2-1. FIG. 10 is a vertical cross-sectional image diagram of the hypochlorous acid water generating unit according to Embodiment 2-1. FIG. 11 is a horizontal cross-sectional image diagram of the hypochlorous acid water generating unit according to Embodiment 2-1. FIG. 12 is a schematic diagram of a hypochlorous acid water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 2-1. 13 is an exploded perspective view of a hypochlorous acid water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 2-1. FIG. FIG. 14 is a vertical sectional image view of a hypochlorous acid water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 2-1. FIG. 15 is a horizontal cross-sectional image diagram of a hypochlorous acid water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 2-1. FIG. 16A is a diagram showing the relationship between the characteristics of hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 2-1 and the electrodialysis time. FIG. 16B is a diagram showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 2-1 and the electrodialysis time. FIG. 16C is a diagram showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 2-1 and the electrodialysis time. FIG. 17 is a schematic diagram of a spatial sterilization system using a hypochlorous acid water supply device according to Embodiment 2-2 of the present disclosure. FIG. 18 is a schematic diagram of a hypochlorous acid water supply device according to Embodiment 3-1 of the present disclosure. FIG. 19 is an exploded perspective view of a hypochlorous acid water supply device according to Embodiment 3-1. FIG. 20 is a vertical cross-sectional image diagram of the hypochlorous acid water supply apparatus according to Embodiment 3-1. FIG. 21 is a horizontal cross-sectional image diagram of the hypochlorous acid water generating unit of the hypochlorous acid water supply apparatus according to Embodiment 3-1. FIG. 22 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment unit of the hypochlorous acid water supply apparatus according to Embodiment 3-1. FIG. 23A is a diagram showing the relationship between the characteristics of hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 3-1 and the electrodialysis time. FIG. 23B is a diagram showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 3-1 and the electrodialysis time. FIG. 23C is a diagram showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 3-1 and the electrodialysis time. FIG. 24 is an exploded perspective view of a hypochlorous acid water supply device according to Embodiment 3-2 of the present disclosure. FIG. 25 is a perspective view showing the manufacturing process of the interdigitated electrode constituting the hypochlorous acid water supply apparatus according to Embodiment 3-2. FIG. 26 is a schematic diagram of a spatial sterilization system using a hypochlorous acid water supply device according to Embodiment 3-3 of the present disclosure. FIG. 27 is a cross-sectional image diagram of a hypochlorous acid water supply device according to Embodiment 4-1 of the present disclosure. FIG. 28 is a schematic diagram of a tap water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. 29 is an exploded perspective view of a tap water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. FIG. 30 is a vertical cross-sectional image diagram of the tap water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 31 is a horizontal cross-sectional image diagram of the tap water treatment unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 32 is a schematic diagram of a hypochlorous acid water generating unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. 33 is an exploded perspective view of a hypochlorous acid water generating unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. FIG. 34 is a vertical cross-sectional image diagram of a hypochlorous acid water generating unit included in the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 35 is a horizontal cross-sectional image diagram of the hypochlorous acid water generating part of the hypochlorous acid water generating unit of the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 36 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment part of the hypochlorous acid water generation unit of the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 37 is an experimental image diagram for evaluating characteristics of hypochlorous acid water flowing through the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 38 is a diagram showing characteristics of hypochlorous acid water that flows through the hypochlorous acid water supply apparatus according to Embodiment 4-1. FIG. 39 is a schematic diagram of a spatial sterilization system using a hypochlorous acid water supply device according to Embodiment 4-2 of the present disclosure.

The hypochlorous acid water treatment apparatus according to the present disclosure is provided with a first flow path in which the positive electrode is exposed and extended along the flow path, and the first flow path and the second flow path are separated from each other, and the flow path and a power supply for applying a voltage between the positive electrode and the negative electrode. The first flow channel and the second flow channel are configured so that the first solution flowing through the first flow channel and the second solution flowing through the second flow channel both flow in the same direction. has a structure of hypochlorous acid water generated by electrolyzing salt water.

According to such a configuration, since the first solution and the second solution are circulated while applying a voltage in the same direction across the diaphragm, the first solution, which is hypochlorous acid water generated by electrolyzing salt water, Cations that cause residual components can be separated. Therefore, it is possible to provide a hypochlorous acid water treatment apparatus capable of producing hypochlorous acid water in which residual components generated by electrolysis of salt water are reduced.

Further, the hypochlorous acid water treatment apparatus according to the present disclosure includes a planar positive electrode, a planar diaphragm facing the positive electrode, and a planar diaphragm facing the positive electrode, provided between the positive electrode and the diaphragm. A first spacer member exposing the positive electrode and the diaphragm is provided in one channel, and the first channel is composed of the positive electrode and the diaphragm exposed along the channel, and the first spacer member. A planar cathode, a planar diaphragm facing the cathode, and a second electrode provided between the cathode and the diaphragm exposing the cathode and the diaphragm into the second flow path along the flow path. a second spacer member, wherein the second channel is composed of the cathode and the diaphragm exposed along the channel, and the second spacer member. By doing so, the ability to separate cations that cause residual components from the first solution is enhanced by the channel shape formed in the first spacer member and the channel shape formed in the second spacer member. Since it can be changed, it is possible to freely design the area and time for separating cations that cause residual components from the first solution.

Further, in the hypochlorous acid water treatment apparatus according to the present disclosure, both the first channel and the second channel are preferably formed in a meandering shape. As a result, the route through which the first solution contacts the positive electrode and the diaphragm and the route through which the second solution contacts the negative electrode and the diaphragm are lengthened, and the process of separating cations that cause residual components from the first solution becomes difficult. Distance and time can be increased. In other words, cations that cause residual components can be efficiently separated from the first solution with respect to the sizes of the positive electrode and the negative electrode.

In addition, in the hypochlorous acid water treatment apparatus according to the present disclosure, both the first solution and the second solution may be hypochlorous acid water produced by electrolyzing salt water. As a result, the first solution circulating in the first flow channel becomes hypochlorous acid water in which the cations that cause residual components are separated and diluted, and the second solution circulating in the second flow channel becomes a factor of residual components. It becomes hypochlorous acid water in which the positive ions are concentrated. That is, from the first solution circulating in the first flow channel, the cations that cause residual components are separated and diluted hypochlorous acid water is obtained, and from the second solution circulating in the second flow channel, residual components are obtained. At the same time, hypochlorous acid water with high detergency containing an alkaline solution in which cations that are factors are concentrated can be obtained.

In addition, the hypochlorous acid water treatment apparatus according to the present disclosure includes a supply pump that supplies the first solution to the first flow path and the second solution to the second flow path, and the supply pump supplies the first solution and the second solution are preferably supplied at a constant flow rate. As a result, the time during which the voltage is applied to the first solution in the first channel can be kept constant, and the time during which the voltage is applied to the second solution in the second channel can be kept constant. can do. For this reason, the concentration at which the cations that cause residual components in the first solution in the first flow channel are separated and diluted, and the concentration at which the cations that cause residual components in the second solution in the second flow channel concentrate. can be stabilized.

Also, in the hypochlorous acid water treatment apparatus according to the present disclosure, both the positive electrode and the negative electrode are preferably made of an electrode material containing platinum. As a result, the electrode material containing platinum can electrolyze salt water to generate hypochlorous acid water, so the salt water component remaining in the first solution is electrolyzed into hypochlorous acid water. be able to. Therefore, the salt water component remaining in the first solution can be electrolyzed to obtain hypochlorous acid water with a higher concentration.

The space sterilization system according to the present disclosure is connected to the above-described hypochlorous acid water treatment device and the first flow path, and uses the first solution to sterilize by releasing hypochlorous acid water mist into a predetermined space. and a device. According to such a configuration, even if the hypochlorous acid water mist is discharged into the predetermined space using the first solution, residual components remaining in the predetermined space are suppressed. In other words, since the first solution is hypochlorous acid water with reduced residual components generated by electrolysis of salt water, when sterilizing a predetermined space, it is possible to prevent metal corrosion caused by residual components while maintaining sterilization performance. can be suppressed.

In addition, in the spatial disinfection system according to the present disclosure, a predetermined space is provided with a drain pipe for discharging water generated in the predetermined space, the second flow path is connected to the drain pipe, and the second flow path is connected to the drain pipe. The structure is configured so that the two solutions can be introduced into the drain pipe. By doing so, hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated is circulated to the drain pipe from the second solution circulating in the second flow path. Therefore, cleaning of drain pipes can be carried out with an alkaline solution.

(Embodiment 1)
Embodiment 1 includes at least Embodiment 1-1 and Embodiment 1-2 below.

(Embodiment 1-1)
A hypochlorous acid water treatment apparatus 1 according to Embodiment 1-1 of the present disclosure will be described with reference to FIGS. 1 to 4. FIG. FIG. 1 is a schematic diagram of a hypochlorous acid water treatment apparatus 1 according to Embodiment 1-1 of the present disclosure. FIG. 2 is an exploded perspective view of the hypochlorous acid water treatment apparatus 1. FIG. FIG. 3 is a vertical cross-sectional image diagram of the hypochlorous acid water treatment apparatus 1. As shown in FIG. FIG. 4 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment apparatus 1 .

The hypochlorous acid water treatment apparatus 1 includes residual components (components having cations such as Na ⁺ ions) contained in hypochlorous acid water generated by electrolysis of salt water (aqueous sodium chloride solution): for example, NaClO, NaOH ) is a device for separating and reducing hypochlorous acid water flowing inside.

Specifically, as shown in FIGS. 1 to 4, the hypochlorous acid water treatment apparatus 1 includes a positive electrode 2, a negative electrode 3, a diaphragm 4, an anode-side spacer 5, and a cathode-side spacer 6. , anode-side electrode packing 7a, cathode-side electrode packing 7b, anode-side tank housing side surface 8a, cathode-side tank housing side surface 8b, anode-side solution supply port 9, anode-side solution extraction port 10, cathode A side solution supply port 11 , a cathode side solution extraction port 12 , an anode channel 13 , a cathode channel 14 , and an electrodialysis power supply 15 are provided.

The positive electrode 2 is a planar electrode plate. The surface of the electrode plate of the anode 2 is exposed along the channel of the anode channel 13 by the anode-side spacer 5 . The positive electrode 2 is an electrode that functions as an anode when current is passed by the electrodialysis power supply 15 . The positive electrode 2 is arranged substantially parallel to and facing the negative electrode 3 . The positive electrode 2 has a platinum-containing catalyst formed on the surface of a titanium base material, and is made of a material that is highly efficient in generating hypochlorous acid by electrolysis. A platinum-containing catalyst is formed at least on the surface of the anode 2 exposed along the flow path of the anode flow path 13 . The main purpose is to move cations by electrodialysis to generate hypochlorous acid water that suppresses NaClO and NaOH as residual components, but NaCl and salt water generated by decomposition of NaClO are electrolyzed. NaCl remaining without being dissolved can also be changed to hypochlorous acid by the platinum electrode.

The cathode 3 is a planar electrode plate. The surface of the electrode plate of the cathode 3 is exposed along the channel of the cathode channel 14 by the cathode-side spacer 6 . Cathode 3 is an electrode that functions as a cathode when current is passed by electrodialysis power supply 15 . The negative electrode 3 is arranged substantially parallel to and facing the positive electrode 2 . The negative electrode 3, like the positive electrode 2, forms a platinum-containing catalyst on its surface. A platinum-containing catalyst is formed at least on the surface of the cathode 3 exposed along the flow path of the cathode flow path 14 . In addition, the positive electrode 2 and the negative electrode 3 in the areas exposed along the anode channel 13 and the cathode channel 14 for electrodialysis have the same shape, and the shorter the opposing distance, the easier it is for ions to move. If the facing distance is short, the flow rate in the flow path will decrease, and the amount of hypochlorous acid water that can be generated will also decrease. is desirable.

The diaphragm 4 is a planar thin film. The diaphragm 4 is arranged substantially parallel to the positive electrode 2 and the negative electrode 3 . The diaphragm 4 is provided so as to separate the anode channel 13 and the cathode channel 14 . The diaphragm 4 is an ion exchange membrane (cation exchange membrane) capable of transferring cations such as Na ⁺ ions related to NaClO and NaOH, which are residual components of hypochlorous acid water. The diaphragm 4 can move cations to the negative electrode 3 by applying a voltage to the positive electrode 2 and the negative electrode 3 . Examples of the cation exchange membrane include Nafion manufactured by DuPont. Since the positive ions are concentrated on the negative electrode 3 side, there is a possibility that scale components contained in tap water or the like may be deposited during long-term use. In order to reduce scale accumulation, for example, each time the hypochlorous acid water is passed through the hypochlorous acid water treatment device 1, the potentials of the positive electrode 2 and the negative electrode 3 are switched to reverse the polarity, and the attached scale is removed. Dissolve. When it is assumed that the electrodes will be used with their polarities reversed, it is desirable that the positive electrode 2 and the negative electrode 3 be similarly treated with a catalyst containing platinum.

The anode-side spacer 5 is an insulating member. The anode-side spacer 5 controls the distance between the anode 2 and the diaphragm 4 to a predetermined distance. The anode-side spacer 5 has, inside the anode-side spacer 5, an anode channel hole 13a that forms an anode channel 13, which will be described later. The anode channel hole 13 a is a hole that forms the anode channel 13 formed in the anode spacer 5 . The anode flow path hole 13a is formed through the front and back surfaces of the anode-side spacer 5, and is formed in a meandering manner so as to reciprocate in the horizontal direction and go up step by step. A meandering packing member (not shown), which is the same as that of the anode spacer 5, is attached to the surface of the anode spacer 5 in order to improve adhesion between the anode 2 and the diaphragm 4. FIG. The anode-side spacer 5 corresponds to the "first spacer member" in the claims.

The cathode-side spacer 6 is an insulating member. A cathode-side spacer 6 controls the distance between the cathode 3 and the diaphragm 4 . The cathode-side spacer 6 has, inside the cathode-side spacer 6, a cathode channel hole 14a that forms a cathode channel 14, which will be described later. The cathode channel hole 14 a is a hole that forms the cathode channel 14 formed in the cathode-side spacer 6 . The cathode passage hole 14a is formed through the front and back surfaces of the cathode-side spacer 6, and is formed in a meandering manner so as to reciprocate in the horizontal direction and go up step by step. Here, the cathode channel hole 14a and the anode channel hole 13a are arranged so as to face each other. Also, on the surface of the cathode-side spacer 6, a meandering packing member (not shown), which is the same as that of the cathode-side spacer 6, is attached in order to increase the adhesion between the cathode 3 and the diaphragm 4. FIG. The cathode-side spacer 6 corresponds to the "second spacer member" in the claims.

The anode-side electrode packing 7a has a shape in which the outer circumference of the anode 2 is hollowed out to the size of the electrode. It is mounted with clamping pressure so that the solution 9a) does not leak out. Insulating silicon rubber can be used as the member of the anode-side electrode packing 7a. The anode-side electrode packing 7a is thicker than the positive electrode 2, and is crushed by being pressed by the tightening pressure, and the anode-side electrode 2 is compressed while the anode-side spacer 5 and the anode-side tank housing side surface 8a are in close contact with each other. It is desirable that the thickness of the

The cathode-side electrode packing 7b has a shape in which the outer periphery of the cathode 3 is hollowed to the size of the electrode. 11a) is mounted with clamping pressure so that it does not leak. Insulating silicon rubber can be used as the member of the cathode-side electrode packing 7b. The cathode-side electrode packing 7b is thicker than the cathode 3, and is crushed by being pressed by the tightening pressure to adhere to the cathode-side spacer 6 and the cathode-side tank housing side surface 8b. It is desirable to keep it thick.

The side surface 8a of the anode-side tank housing is arranged so as to be in direct contact with the outside of the anode 2. In order to prevent the solution from permeating to the outside of the positive electrode 2, the anode-side tank housing side surface 8a has a packing (not shown) for increasing the adhesion on the inner surface of the anode-side tank housing side surface 8a. It is desirable to apply clamping pressure to prevent the solution from flowing out of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the positive electrode 2, the efficiency of electrodialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The side surface 8b of the cathode-side tank housing is arranged so as to be in direct contact with the outside of the cathode 3. A packing (not shown) is provided on the inner surface of the cathode-side tank housing side surface 8b to increase adhesion in order to prevent the solution from permeating to the outside of the cathode 3. It is desirable to apply clamping pressure to prevent the solution from flowing out of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the negative electrode 3, the efficiency of electrode dialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The anode-side solution supply port 9 is a connection port for flowing the anode-side supply solution 9a to be electrodialyzed into the channel, and is equipped with a connector (not shown) for connecting a tube. In order to supply the anode-side supply solution 9 a from the outside of the positive electrode 2 , the anode-side solution supply port 9 is processed at a position outside the positive electrode 2 .

The anode-side supply solution 9a is hypochlorous acid water electrolyzed from salt water. The anode-side supply solution 9 a is introduced into the anode channel 13 from the anode-side solution supply port 9 . The anode-side supply solution 9a corresponds to the "first solution" in the claims.

More specifically, the anode-side supply solution 9a contains NaClO and HClO, which are components of hypochlorous acid water, generated by electrolyzing salt water. Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like. As the electrolysis of brine proceeds, the concentration of NaCl decreases and the concentrations of NaClO, HClO, and NaOH increase. Since HClO and NaOH react to form NaClO, hypochlorous acid water containing NaClO as a main component is produced when salt water is sufficiently electrolyzed, and the pH indicates alkaline. Components containing Na ⁺ ions, which are cations, become residual components after volatilization, and NaClO, NaOH, and NaCl are applicable as residual components generated by electrolysis of salt water.

The anode-side solution extraction port 10 is a connection port for taking out the electrodialyzed anode-side extraction solution 10a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the anode-side extraction solution 10 a outside the positive electrode 2 , the anode-side solution extraction port 10 is processed at a position on the outer periphery of the positive electrode 2 .

The anode-side extraction solution 10a is hypochlorous acid water containing HClO as its main component. The anode-side extraction solution 10 a is introduced from the anode flow path 13 into the anode-side solution extraction port 10 . The anode-side extraction solution 10a also corresponds to the "first solution" in the claims.

More specifically, the anode-side extraction solution 10a is a solution obtained by circulating the anode-side supply solution 9a through the anode flow path 13 to separate and dilute cations, which are factors of residual components, from the anode-side supply solution 9a. When hypochlorous acid water produced by electrolyzing salt water is used as the anode-side supply solution 9a, the anode-side extraction solution 10a has Na ⁺ ions, which are cations, separated and diluted, and the HClO component is removed. It becomes the hypochlorous acid water of the main component. pH indicates acidity.

The cathode-side solution supply port 11 is a connection port for flowing the cathode-side supply solution 11a to be electrodialyzed into the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to supply the cathode-side supply solution 11 a from the outside of the cathode 3 , the cathode-side solution supply port 11 is processed at a position outside the cathode 3 .

The cathode-side supply solution 11a is hypochlorous acid water electrolyzed from salt water, pure water, or tap water. The cathode-side supply solution 11 a is introduced from the cathode-side solution supply port 11 into the cathode channel 14 . The cathode-side supply solution 11a corresponds to the "second solution" in the claims.

More specifically, when hypochlorous acid water electrolyzed from salt water is used as the cathode-side supply solution 11a, the cathode-side supply solution 11a contains NaClO and HClO, which are components of the hypochlorous acid water. be Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like. As the electrolysis of brine proceeds, the concentration of NaCl decreases and the concentrations of NaClO, HClO, and NaOH increase. Since HClO and NaOH react to form NaClO, hypochlorous acid water containing NaClO as a main component is produced when salt water is sufficiently electrolyzed, and the pH indicates alkaline. When pure water is used as the cathode-side supply solution 11a, the solution does not contain ionic components and exhibits a neutral pH. When tap water is used as the cathode-side supply solution 11a, it becomes a solution containing ionic components in tap water in the region of use.

If pure water containing no ionic components is used as the cathode-side supply solution 11a, no current will flow between the positive electrode 2 and the negative electrode 3, so a high voltage must be applied in order to pass a constant current. When hypochlorous acid water produced by electrolyzing salt water is used as the cathode-side supply solution 11a, since ions are contained in the solution, it is possible to reduce the application of voltage for causing a constant current to flow. . When tap water is used as the cathode-side supply solution 11a, since it contains ions, it is possible to reduce the application of voltage for causing a constant current to flow. condition setting is required.

The cathode-side solution extraction port 12 is a connection port for extracting the electrodialyzed cathode-side extraction solution 12a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the cathode-side extraction solution 12 a outside the cathode 3 , the cathode-side solution extraction port 12 is processed at a position outside the cathode 3 .

When the cathode-side supply solution 11a is hypochlorous acid water electrolyzed from salt water, the cathode-side extraction solution 12a is hypochlorous acid water containing NaClO and NaOH as main components, and the cathode-side supply solution 11a is pure water or Tap water is an alkaline solution with NaOH as the main component. The cathode-side extraction solution 12 a is introduced from the cathode flow path 14 into the cathode-side solution extraction port 12 . The cathode side extraction solution 12a also corresponds to the "second solution" in the claims.

More specifically, the cathode-side extraction solution 12a is a solution in which cations that cause residual components are concentrated. When hypochlorous acid water produced by electrolyzing salt water is used as the cathode-side supply solution 11a, the cathode-side extraction solution 12a has Na ⁺ ions, which are cations, separated and concentrated as NaOH. By being generated, NaOH and NaClO become hypochlorous acid water as main components. pH indicates alkaline. When pure water or tap water is used as the cathode-side supply solution 11a, the cathode-side extraction solution 12a contains Na ⁺ ions, which are cations, separated and concentrated, and contains NaOH as a main component and has an alkaline pH. It becomes a solution.

The anode-side solution supply port 9 and the cathode-side solution supply port 11 are desirably arranged on the lower side in the vertical direction, and the anode-side solution extraction port 10 and the cathode-side solution extraction port 12 are arranged on the upper side in the vertical direction. It is desirable that When oxygen gas, hydrogen gas, and the like are generated by the electrodialysis reaction and the electrolysis reaction in the flow path, the gas can be more efficiently discharged together with the solution if the extraction port is arranged above.

The anode channel 13 is a channel formed by a region surrounded by the positive electrode 2 , the anode-side spacer 5 and the diaphragm 4 . The anode channel 13 is formed in a meandering manner by the anode channel hole 13 a of the anode-side spacer 5 . More specifically, the anode flow path 13 reciprocates in the horizontal direction, and the distance for electrodialysis is obtained by the number of horizontal reciprocations until the anode-side solution reaches from the bottom to the top. Furthermore, by reducing the channel width of the anode channel 13, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce the backflow of the liquid in the anode channel 13, it is desirable to have a structure in which the anode channel 13 is unidirectionally directed from bottom to top except for reciprocation in the horizontal direction. The anode flow path 13 is provided with the anode-side solution supply port 9 on one side and the anode-side solution extraction port 10 on the other side, and the anode-side supply solution 9a, which is the anode-side solution, flows inside. . The anode channel 13 corresponds to the "first channel" in the claims.

The cathode channel 14 is a channel formed by a region surrounded by the cathode 3 , the cathode-side spacer 6 and the diaphragm 4 . The cathode channel 14 is formed in a meandering manner by the cathode channel holes 14 a of the cathode-side spacer 6 . More specifically, the cathode flow path 14 reciprocates in the horizontal direction, and the distance for electrodialysis is obtained by the number of horizontal reciprocations until the cathode-side solution reaches from the bottom to the top. Further, by reducing the channel width of the cathode channel 14, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the cathode channel 14, it is desirable to have a structure in which the cathode channel 14 flows in one direction, from bottom to top, except for reciprocation in the horizontal direction. The cathode flow path 14 is provided with the cathode side solution supply port 11 on one side and the cathode side solution extraction port 12 on the other side, and the cathode side supply solution 11a, which is the cathode side solution, flows inside. . The cathode channel 14 corresponds to the "second channel" in the claims.

The anode channel 13 and the cathode channel 14 are symmetrically opposed to each other with the diaphragm 4 interposed therebetween. That is, the anode flow channel 13 and the cathode flow channel 14 are formed in meandering shapes facing each other with the diaphragm 4 interposed therebetween. Then, the Na ⁺ ions contained in the hypochlorous acid water flowing through the anode channel 13 move to the cathode channel 14 side. The amount of ion movement is controlled by the applied voltage and current and the flow velocity in the channel. The flow rate was adjusted by installing a pump (not shown) either before the anode-side solution supply port 9 and the cathode-side solution supply port 11 or after the anode-side solution extraction port 10 and the cathode-side solution extraction port 12. can be controlled. The pump is desirably a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By flowing the solution at a constant flow rate, it is possible to control the electrodialysis and electrolysis time in the flow path constant, so that the concentration of the hypochlorous acid water to be extracted can be stably controlled.

The electrodialysis power supply 15 is a DC power supply that is connected to the positive electrode 2 and the negative electrode 3 and that can apply current to the positive electrode 2 and the negative electrode 3 . The electrodialysis power supply 15 may be used as a constant-current controlled power supply to maintain a constant current, or may be used as a constant-voltage controlled power supply to generate a constant voltage. In order to reduce scale accumulation, the electrodialysis power supply 15 switches the potentials of the positive electrode 2 and the negative electrode 3 each time the hypochlorous acid water is passed through the hypochlorous acid water treatment device 1, for example. It may be controlled to reverse polarity and dissolve adhering scale.

As described above, the hypochlorous acid water treatment apparatus 1 is composed of each member.

Next, referring to FIGS. 3 and 4, the processing operation of the hypochlorous acid water treatment apparatus 1 will be described.

As shown in FIGS. 3 and 4, in the hypochlorous acid water treatment apparatus 1, the anode-side supply solution 9a is supplied to the anode channel 13 through the anode-side solution supply port 9, and the cathode-side solution supply port 11 is supplied. The cathode side supply solution 11a is supplied to the cathode channel 14 through the channel. Then, the anode-side supply solution 9a supplied from the anode-side solution supply port 9 flows through the meandering anode flow path 13, and the cathode-side supply solution 11a supplied from the cathode-side solution supply port 11 flows. flows through the cathode flow path 14 which is also meandering. At this time, the anode-side supply solution 9a and the cathode-side supply solution 11a face each other with the diaphragm 4 interposed therebetween and flow in the same direction to flow through the anode channel 13 and the cathode channel 14, respectively. A voltage is applied to the positive electrode 2 and the negative electrode 3 . When a voltage is applied, negative ions are attracted to the positive electrode 2 side and positive ions (Na ⁺ ions) to the negative electrode 3 side. Since the diaphragm 4 is composed of a membrane that is permeable only to cations, the cations (Na ⁺ ions) contained in the anode-side supply solution 9a flowing through the anode channel 13 permeate the diaphragm 4, It is drawn to the cathode 3 side through the cathode side supply solution 11 a of the cathode flow path 14 . On the contrary, since the anions flowing through the cathode channel 14 cannot pass through the diaphragm 4, only the anions contained in the anode channel 13 are attracted to the positive electrode 2. FIG. By repeating this, cations (Na ⁺ ions) contained in the anode-side supply solution 9a flowing through the anode flow channel 13 move to the cathode-side supply solution 11a flowing through the cathode flow channel 14, and electrodialysis proceeds. The anode-side supply solution 9a flowing through the anode channel 13 has cations (Na ⁺ ions) separated and diluted, and the cathode-side supply solution 11a flowing through the cathode channel 14 contains cations (Na ⁺ ions). is concentrated and extracted. As a result, hypochlorous acid water in which the residual components NaClO and NaOH are separated and diluted and the HClO component is the main component is extracted from the anode-side solution extraction port 10 as the anode-side extraction solution 10a. Conversely, from the cathode side solution extraction port 12, a solution (hypochlorous acid water or water) containing a component in which the Na ⁺ ions constituting the residual components are concentrated and generated as NaOH is discharged as the cathode side extraction solution 12a. extracted.

In the treatment operation of the hypochlorous acid water treatment apparatus 1, the amount of movement of cations (Na ⁺ ions) is increased by lengthening the electrodialysis time in the anode channel 13 and the cathode channel 14. Thus, the residual components of NaClO and NaOH in the anode-side extraction solution 10a can be further reduced. In order to lengthen the electrodialysis time, it is necessary to lengthen the distance between the anode flow path 13 and the cathode flow path 14. For this purpose, it is necessary to move upward step by step while reciprocating in the horizontal direction. , is formed in a meandering manner, and the distance for electrodialysis is earned by the number of horizontal reciprocations until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional areas of the anode channel 13 and the cathode channel 14, the distance becomes longer, and the electrodialysis time can be lengthened.

The flow rate of each solution passing through the anode channel 13 and the cathode channel may be the same or different. Different flow rates affect the concentration of each solution extracted. For example, when the flow velocity of the anode flow channel 13 is relatively fast and the flow velocity of the cathode flow channel 14 is relatively low, compared to the case where the flow speeds of the anode flow channel 13 and the cathode flow channel 14 are the same, As a result, the cathode-side extraction solution 12a extracted from the cathode flow path 14 becomes a solution with a small amount and high concentration. Therefore, when the cathode-side extraction solution 12a is drained, it is desirable to slow down the flow velocity of the cathode flow path 14 .

Next, referring to FIGS. 5A to 5C, an anode-side extraction solution 10a and a cathode which are actually circulated through the hypochlorous acid water treatment apparatus 1 and extracted from the anode-side solution extraction port 10 and the cathode-side solution extraction port 12 The characteristics (conductivity, pH, and effective chlorine concentration) of the hypochlorous acid water of the side extraction solution 12a will be described. 5A to 5C are diagrams showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water treatment apparatus 1 and the electrodialysis time. More specifically, FIG. 5A is a diagram showing the relationship between electrodialysis time and electrical conductivity by the hypochlorous acid water treatment apparatus 1. FIG. FIG. 5B is a diagram showing the relationship between electrodialysis time and pH by the hypochlorous acid water treatment apparatus 1. FIG. FIG. 5C is a diagram showing the relationship between electrodialysis time and effective chlorine concentration by the hypochlorous acid water treatment apparatus 1. FIG.

In the experimental evaluations in FIGS. 5A to 5C, the hypochlorous acid water treatment apparatus 1 was formed with the anode channel 13 and the cathode channel 14 having a channel cross-sectional area of 8 mm ² and a channel length of 675 mm. board. In addition, each solution (both hypochlorous acid water) is passed through the anode channel 13 and the cathode channel 14 at four flow rates of 51 mL/h, 153 mL/h, 250 mL/h, and 360 mL/h. The electrodialysis time was adjusted, and the electrical conductivity, pH, and available chlorine concentration of the anode-side extraction solution 10a and the cathode-side extraction solution 12a were measured.

In addition, the hypochlorous acid water (hypochlorous acid water electrolyzed from salt water) of the anode side supply solution 9a and the cathode side supply solution 11a supplied to the anode side solution supply port 9 and the cathode side solution supply port 11 Conductivity: 264 μS/cm, pH: 8.5, effective chlorine concentration: 142 ppm, and chloride ion concentration: 10 ppm or less were used. In addition, electrodialysis and electrolysis were performed using a power supply capable of applying a constant current of 0.2 A as the electrodialysis power supply 15 . Here, the electrodialysis time refers to the time during which the solution is in direct contact with the positive electrode 2 and the negative electrode 3 in the channel, and the longer the electrodialysis time, the slower the flow rate. This time, electrodialysis and electrolysis are performed by setting the flow rate on the anode side and the cathode side to be the same.

Looking at the transition of the conductivity shown in FIG. 5A, the longer the electrodialysis time, in other words, the slower the flow rate, the more the conductivity of the anode-side extraction solution 10a extracted from the anode-side solution extraction port 10 (the anode-side conductivity). decreases, and the conductivity of the cathode-side extraction solution 12a extracted from the cathode-side solution extraction port 12 (cathode-side conductivity) increases. This is because Na ⁺ ions, which are cations contained in the anode-side solution flowing through the anode flow path 13, move through the diaphragm 4 to the cathode side, and the anode side changes from NaClO to HClO, resulting in a decrease in conductivity. it is conceivable that. NaClO ionizes into Na ⁺ ions and ClO 2 ⁻ ions, but since HClO mainly exists as a molecule, the conductivity decreases when NaClO changes to HClO.

Looking at the change in pH shown in FIG. 5B, the pH of the anode-side extraction solution 10a (the pH on the anode side) changes to the slightly acidic side, and the pH of the cathode-side extraction solution 12a (the pH on the cathode side) changes to the more alkaline side. is changing. This indicates the effect of the change from NaClO to HClO on the anode side. The reason that the longer the electrodialysis time on the anode side is, the closer the pH is to neutrality is thought to be due to electrolysis of the chloride ions remaining in the solution into hypochlorous acid. On the other hand, on the cathode side, NaOH is formed by movement of Na ⁺ ions, and the cathode side becomes more alkaline.

Looking at the transition of the effective chlorine concentration shown in FIG. 5C, the effective chlorine concentration of the anode-side extraction solution 10a (the effective chlorine concentration on the anode side) does not change significantly because it is a change from NaClO to HClO. An increase in the effective chlorine concentration can be seen due to the chloride ions remaining in the water being electrolyzed into hypochlorous acid. It is considered that the effective chlorine concentration of the cathode-side extraction solution 12a (the effective chlorine concentration on the cathode side) decreases as the electrodialysis time increases due to the decomposition of NaClO. Therefore, the electrodialysis time is set under the condition that the conductivity on the anode side is sufficiently reduced as shown in FIG. It is possible to simultaneously extract hypochlorous acid water mainly composed of HClO with high sterilization power, and hypochlorous acid water mainly composed of NaClO and NaOH with high detergency from the cathode side. Hypochlorous acid water containing mainly HClO is a solution in which residual components are suppressed, and it is possible to suppress metal corrosion caused by residual components even during space spraying while maintaining sterilization power. On the other hand, hypochlorous acid water containing NaClO and NaOH as a main component cannot be sprayed in space because it is a solution that leaves residual components, but it is a solution with high detergency and is effective in washing areas with acidic dirt such as drains. can bring In the hypochlorous acid water treatment device 1, hypochlorous acid water mainly composed of HClO generated on the anode side is used for space sterilization, while hypochlorous acid mainly composed of NaClO and NaOH is generated on the cathode side on the opposite side. Water can also be used for cleaning.

As described above, according to the hypochlorous acid water treatment apparatus 1 according to Embodiment 1-1, the following effects can be enjoyed.

(1) The hypochlorous acid water treatment apparatus 1 is provided with an anode channel 13 in which the positive electrode 2 is exposed and extended along the channel, and the anode channel 13 and the cathode channel 14 are separated from each other. , a diaphragm 4 that allows the passage of cations contained in the anode-side solution (anode-side supply solution 9 a ) flowing through the channel, and an electrodialysis power source 15 that applies a voltage between the positive electrode 2 and the negative electrode 3 . In the anode flow channel 13 and the cathode flow channel 14, an anode-side solution (anode-side supply solution 9a) flowing through the anode flow channel 13 and a cathode-side solution (cathode-side supply solution 11a) flowing through the cathode flow channel 14 are mixed. Both are configured to flow in the same direction, and at least the anode-side supply solution 9a is hypochlorous acid water produced by electrolyzing salt water. According to such a configuration, the anode-side solution (anode-side supply solution 9a) and the cathode-side solution (cathode-side supply solution 11a) are circulated while applying a voltage in the same direction with the diaphragm 4 interposed therebetween, so that salt water is electrolyzed. It is possible to separate cations that cause residual components from the anode-side solution (anode-side supply solution 9a), which is hypochlorous acid water generated by the above process. Therefore, it is possible to provide the hypochlorous acid water treatment apparatus 1 capable of producing hypochlorous acid water with reduced residual components generated by the electrolysis of salt water.

(2) The hypochlorous acid water treatment device 1 includes a planar positive electrode 2, a planar diaphragm 4 facing the positive electrode 2, and provided between the positive electrode 2 and the diaphragm 4, and an anode-side spacer 5 exposing the positive electrode 2 and the diaphragm 4 in the anode channel 13 along the anode channel 13. The anode-side spacer 5 exposes the positive electrode 2 and the diaphragm 4 along the channel. 5. Further, a planar cathode 3, a planar diaphragm 4 facing the cathode 3, and a cathode 3 are provided between the cathode 3 and the diaphragm 4, and placed in the cathode flow path 14 along the flow path. and a cathode-side spacer 6 exposing the diaphragm 4 , and the cathode flow path 14 is composed of the cathode-side spacer 6 and the cathode 3 and the diaphragm 4 exposed along the flow path. As a result, the cations that cause residual components are separated from the anode-side solution (anode-side supply solution 9a) by the channel shape formed in the anode-side spacer 5 and the channel shape formed in the cathode-side spacer 6. Therefore, the area and time for separating cations that cause residual components from the anode-side solution (anode-side supply solution 9a) can be freely designed.

(3) In the hypochlorous acid water treatment apparatus 1, both the anode flow path 13 and the cathode flow path 14 are formed in a meandering structure. As a result, the path along which the anode-side solution (anode-side supply solution 9a) contacts the positive electrode 2 and the diaphragm 4 and the path along which the cathode-side solution (cathode-side supply solution 11a) contacts the cathode 3 and the diaphragm 4 become longer, It is possible to lengthen the processing time and time for separating cations that cause residual components from the anode-side solution (anode-side supply solution 9a). That is, cations that cause residual components can be efficiently separated from the anode-side solution (anode-side supply solution 9a) for the sizes of the positive electrode 2 and the negative electrode 3 .

(4) In the hypochlorous acid water treatment apparatus 1, both the anode-side supply solution 9a and the cathode-side supply solution 11a may be hypochlorous acid water produced by electrolyzing salt water. In such a case, the anode-side solution (anode-side supply solution 9a) flowing through the anode flow channel 13 becomes hypochlorous acid water separated and diluted by permeation of cations that cause residual components, and the cathode flow channel. The cathode-side solution (cathode-side supply solution 11a) flowing through 14 is hypochlorous acid water in which cations that cause residual components are concentrated. That is, from the anode-side solution (anode-side supply solution 9a) flowing through the anode flow channel 13, hypochlorous acid water in which the cations that are the cause of residual components are separated and diluted is obtained, and the hypochlorous acid water flows through the cathode flow channel 14. From the cathode side solution (cathode side supply solution 11a), hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated can be obtained at the same time.

(5) The hypochlorous acid water treatment apparatus 1 supplies an anode-side solution (anode-side supply solution 9a) to the anode channel 13, and supplies a cathode-side solution (cathode-side supply solution 11a) to the cathode channel 14. A supply pump (not shown) is provided, and the supply pump is configured to supply the anode side solution (anode side supply solution 9a) and the cathode side solution (cathode side supply solution 11a) at a constant flow rate. In such a case, the time during which the voltage is applied to the anode-side solution (anode-side supply solution 9a) in the anode channel 13 can be made constant, and the cathode-side solution ( The time during which the voltage is applied to the cathode-side supply solution 11a) can be made constant. For this reason, the concentration at which cations that cause residual components in the anode-side solution (anode-side supply solution 9a) in the anode flow channel 13 are separated and diluted, and the cathode-side solution (cathode-side supply solution 11a) in the cathode flow channel 14 It is possible to stabilize the concentration of cations that contribute to residual components in .

(6) In the hypochlorous acid water treatment device 1, both the positive electrode 2 and the negative electrode 3 are made of an electrode material containing platinum. As a result, the electrode material containing platinum can electrolyze salt water to generate hypochlorous acid water. It can be made into hypochlorous acid water. Therefore, the salt water component remaining in the anode-side solution (anode-side supply solution 9a) can be electrolyzed to obtain hypochlorous acid water with a higher concentration.

(Embodiment 1-2)
A spatial sterilization system 20 using a hypochlorous acid water treatment apparatus 1 according to Embodiment 1-2 of the present disclosure will be described with reference to FIG. FIG. 6 is a schematic diagram of a space sterilization system 20 using the hypochlorous acid water treatment apparatus 1 according to Embodiment 1-2 of the present disclosure. The space sterilization system according to Embodiment 1-2 described below is a system incorporating the hypochlorous acid water treatment apparatus 1 according to Embodiment 1-1. In the description of Embodiment 1-2, the substantially same configurations as the hypochlorous acid water treatment apparatus 1 according to Embodiment 1-1 are denoted by the same reference numerals, and the description is partially simplified. or may be omitted.

The space sterilization system 20 according to the present embodiment 1-2 sprays hypochlorous acid water generated from the hypochlorous acid water treatment device 1 from the mist spray device 27 in the bathroom space and at the drain port 29. It is a system that sterilizes and cleans the bathroom space by flushing.

Specifically, as shown in FIG. 6, the space sterilization system 20 includes a hypochlorous acid water treatment device 1, a hypochlorous acid water generation device 21, an anode side supply pump 22, and a cathode side supply pump. 23, an anode-side extraction solution tank 24, a cathode-side extraction solution tank 25, an anode-side extraction solution bath pipe 26, a mist spray device 27, a cathode-side extraction solution bath pipe 28, and a drain port 29. .

The hypochlorous acid water treatment apparatus 1 extracts the anode side extraction solution 10a, which is hypochlorous acid water mainly composed of HClO with high sterilization power, from the anode flow path 13, and NaClO and NaClO with high detergency from the cathode flow path 14. It is an apparatus for extracting the cathode side extraction solution 12a, which is hypochlorous acid water mainly containing NaOH. After being stored in the anode-side extraction solution tank 24 , the anode-side extraction solution 10 a is sent to the mist spraying device 27 through the anode-side extraction solution bathroom piping 26 . Then, the anode-side extraction solution 10a is sprayed from the mist spray device 27 into the bathroom space. Further, the cathode-side extraction solution 12 a is stored in the cathode-side extraction solution tank 25 and then sent to the drain port 29 through the cathode-side extraction solution bathroom pipe 28 . The cathode-side extraction solution 12a flows through the drain port 29 and flows through the drain port 29 to the drain pipe.

The hypochlorous acid water generator 21 is a device that supplies salt water (aqueous sodium chloride solution) and generates hypochlorous acid water by electrolysis. Two electrodes, an anode and a cathode, are placed in an electrolytic cell containing salt water, and a voltage is applied to electrolyze the salt water. Hypochlorous acid water produced by electrolysis contains NaClO and HClO, which are components of hypochlorous acid water. Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like. As the electrolysis of brine proceeds, the concentration of NaCl decreases and the concentrations of NaClO, HClO, and NaOH increase. Since HClO and NaOH react to form NaClO, hypochlorous acid water containing NaClO as a main component is produced when salt water is sufficiently electrolyzed, and the pH indicates alkaline. Components containing Na + ions, which are cations, become residual components after volatilization, and NaClO, NaOH, and NaCl are applicable as residual components generated by electrolysis of salt water.

The anode-side supply pump 22 extracts hypochlorous acid water produced by electrolysis of salt water from the electrolytic cell of the hypochlorous acid water generator 21, and extracts hypochlorous acid water as an anode-side solution (anode-side supply solution 9a). It is a pump for supplying to the anode channel 13 of the chloric acid water treatment apparatus 1 . The anode-side supply pump 22 can send liquid from the electrolytic cell of the hypochlorous acid water generator 21 to the anode flow path 13 of the hypochlorous acid water treatment apparatus 1 at a constant flow rate. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The cathode-side supply pump 23 extracts the hypochlorous acid water produced by the electrolysis of salt water from the electrolytic cell of the hypochlorous acid water generator 21, and extracts hypochlorous acid water as a cathode-side solution (cathode-side supply solution 11a). It is a pump for supplying to the cathode channel 14 of the chloric acid water treatment apparatus 1 . The cathode-side supply pump 23 can feed liquid from the electrolytic cell of the hypochlorous acid water generator 21 to the cathode flow path 14 of the hypochlorous acid water treatment apparatus 1 at a constant flow rate. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The anode-side extraction solution tank 24 temporarily holds the anode-side extraction solution 10 a , which is hypochlorous acid water containing mainly HClO with high sterilizing power extracted from the anode flow path 13 , until it is sent to the mist spray device 27 . It is a tank that stores The anode-side extraction solution tank 24 is connected to a mist spraying device 27 via an anode-side extraction solution bathroom piping 26 .

The cathode-side extraction solution tank 25 temporarily holds the cathode-side extraction solution 12a, which is hypochlorous acid water containing NaClO and NaOH with high detergency extracted from the cathode flow path 14, until it is sent to the drain port 29. It is a tank that stores The cathode-side extraction solution tank 25 is connected to a drain port 29 via a cathode-side extraction solution bathroom pipe 28 .

The anode-side extraction solution bathroom pipe 26 is a pipe for sending liquid from the anode-side extraction solution tank 24 to the mist spray device 27 . The anode-side extraction solution bathroom pipe 26 is installed behind the wall and on the ceiling of the bathroom, and is connected to a mist spraying device 27 installed on the ceiling.

The cathode-side extraction solution bathroom pipe 28 is a pipe for sending liquid from the cathode-side extraction solution tank 25 to the drain port 29 . The cathode-side extraction solution bathroom pipe 28 is installed behind the wall and floor of the bathroom and connected to a drain port 29 .

The mist spraying device 27 is a device that sprays hypochlorous acid water in the form of mist into the bathroom space. More specifically, the mist spraying device 27 turns the anode-side extraction solution 10a, which is hypochlorous acid water, transported from the anode-side extraction solution tank 24 through the anode-side extraction solution bathroom piping 26 into fine mist. It is a device that emits. The mist spraying device 27 is installed so that the spraying part protrudes from the ceiling toward the bathroom so that the mist can be sprayed from the ceiling of the bathroom to the entire bathroom. The mist spraying method includes a two-fluid spraying method that uses compressed air to atomize the mist, an ultrasonic method that uses an ultrasonic element to atomize a fine mist of 10 μm or less, or a solution that is released from a rotating body and crushed. and a crushing spray method in which a fine mist of 1 μm or less is sprayed.

The drain port 29 is a connection port for connecting with a drain pipe for discharging water or dirt generated in the bathroom space to the outside of the bathroom space. The cathode-side extraction solution 12a is conveyed from the cathode-side extraction solution tank 25 to the drain port 29 through the cathode-side extraction solution bathroom pipe 28, and the cathode-side extraction solution 12a, which is hypochlorous acid water mainly composed of NaClO and NaOH with high detergency, is delivered to the drain port 29. The extraction solution 12a can wash dirt on the drain port 29 and the drain pipe connected to the drain port 29 .

Next, the operation of the space disinfection system 20 will be explained.

In the space sterilization system 20, in order to make the space sterilization system 20 usable when the use of the bathroom is finished, hypochlorous acid water generated in advance by electrolysis of salt water in the hypochlorous acid water generator 21 is added. Generate. In addition, using the hypochlorous acid water treatment apparatus 1, the anode side extraction solution 10a, which is hypochlorous acid water mainly composed of HClO with high sterilization power, is stored in the anode side extraction solution tank 24 in a necessary amount. A necessary amount of the cathode side extraction solution 12a, which is hypochlorous acid water containing mainly NaClO and NaOH with high detergency, is stored in the cathode side extraction solution tank 25 . When the user presses the start switch of the space sterilization system 20 after using the bathroom, the liquid is automatically sent from the anode side extraction solution tank 24 to the mist spray device 27, and the amount necessary for daily sterilization ( For example, 400 mL) is sprayed. In addition, from the cathode side extraction solution tank 25, the liquid is automatically sent to the drain port 29, and the amount (for example, 400 mL) required for washing is passed.

As a result, hypochlorous acid water containing mainly HClO with high sterilizing power is mist-sprayed from the mist spraying device 27, so that mold and bacteria in the bathroom space can be sterilized by the oxidizing power of HClO. . In addition, by regularly spraying after each bath, it is possible to maintain a bathroom space where mold and fungi do not grow in the bathroom. In particular, since residual ionic components such as NaClO and NaOH are suppressed, even if they adhere to the metal surface during spraying, they will not remain as residual components, and the occurrence of long-term corrosion due to residual components can be suppressed. can.

On the other hand, since hypochlorous acid water containing mainly NaClO and NaOH with high detergency is passed through the drain port 29, it is possible to reduce the sliminess of the drain port 29 and the drain pipe. Dirt related to people is on the acid side, and since the dirt on the acid side is gathering at the drain port 29, alkaline NaClO and hypochlorous acid water containing mainly NaOH is used to neutralize the dirt while removing it. Become.

A more comfortable bathroom space can be achieved by combining HClO-based hypochlorous acid water mist spraying and NaClO and NaOH-based hypochlorous acid water through the drain port 29 .

As described above, according to the spatial sterilization system 20 using the hypochlorous acid water treatment apparatus 1 according to Embodiment 1-2, the following effects can be enjoyed.

(7) The space sterilization system 20 is connected to the hypochlorous acid water treatment device 1 and the anode flow path 13, and uses the anode side extraction solution 10a to emit hypochlorous acid water mist into the bathroom space. A structure including a spray device 27 was adopted. According to such a configuration, even if the hypochlorous acid water mist is discharged into the bathroom space using the anode-side extraction solution 10a, residual components remaining in the bathroom space are suppressed. In other words, since the anode-side extraction solution 10a is hypochlorous acid water in which residual components generated by the electrolysis of salt water are reduced, when sterilizing the bathroom space, the sterilization performance is maintained while metals caused by the residual components are removed. It is possible to suppress the occurrence of corrosion.

(8) In the space sterilization system 20, the bathroom space is provided with a drain port 29 for discharging water generated in the bathroom space, and the cathode flow path 14 is connected to the drain port 29 for communication with the cathode side extraction. The structure is such that the solution 12 a can be introduced into the drain port 29 . From the cathode-side extraction solution 12a flowing through the cathode channel 14, hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated is connected to the drain port 29 (and the drain port 29). Therefore, the drainage port 29 and the drainage pipe connected to the drainage port 29 can be washed with the alkaline solution.

As described above, the present disclosure has been described based on the first embodiment, but the present disclosure is not limited to the first embodiment described above, and various modifications and improvements are possible within the scope of the present disclosure. One thing is easy to guess.

(Embodiment 2)
Conventionally, by electrolyzing salt water, hypochlorous acid water containing NaClO as a main component and containing HClO and NaOH is produced. Hypochlorous acid water is known to improve its sterilization power by making it weakly acidic, and a technology is known to control the pH generated using a diaphragm with ion permeability to the weakly acidic side. It is (See Patent Document 1, for example).

However, it cannot be said that NaClO and NaOH, which are residual components, are sufficiently suppressed only by adjusting the pH to be weakly acidic. NaClO and NaOH are components that remain as solids on the surface of the hypochlorous acid water after volatilization, and these residual components deliquesce and re-dissolve in water, thereby promoting metal corrosion. Therefore, when hypochlorous acid water containing a large amount of NaClO and NaOH components is mist-sprayed, fine residual components are accumulated, which may cause corrosion during long-term use.

Therefore, an object of the present disclosure is to provide a hypochlorous acid water supply device capable of supplying hypochlorous acid water with reduced residual components generated by electrolysis of salt water.

According to the present disclosure, it is possible to provide a hypochlorous acid water supply device capable of supplying hypochlorous acid water with reduced residual components generated by electrolysis of salt water.

The hypochlorous acid water supply device according to the present disclosure continuously electrolytically generates hypochlorous acid water by energizing between a pair of first cathode and cathode electrodes from salt water supplied in a meandering membrane-free electrolytic flow path. and the hypochlorous acid water supplied from the hypochlorous acid water generation unit to each of the meandering diaphragm electrolysis flow paths between the pair of second negative and positive electrodes. a hypochlorous acid water treatment unit that continuously treats by energization. The structure is such that the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is supplied to the outside.

According to this configuration, in the hypochlorous acid water generation unit, salt water is electrolyzed in the non-diaphragm electrolysis channel to generate hypochlorous acid water, and in the hypochlorous acid water treatment unit, the diaphragm electrolysis channel is provided. The hypochlorous acid water generated in the non-diaphragm electrolysis flow path is circulated inside, and the cations that cause residual components can be separated and reduced from the positive electrode side, and can be extracted as hypochlorous acid water. For this reason, it is possible to provide a one-pass type hypochlorous acid water supply device capable of externally supplying hypochlorous acid water from which residual components generated by electrolysis of salt water are separated.

In addition, in the hypochlorous acid water supply device according to the present disclosure, the non-diaphragm electrolysis channel includes a planar first positive electrode, a planar first negative electrode facing the first positive electrode, and a first positive electrode. and a spacer member provided between the electrode and the first negative electrode. By exposing it, it is configured in a meandering shape. By doing so, the ability to electrolyze salt water can be changed according to the channel shape formed in the spacer member, so that the area and time for electrolyzing salt water can be freely designed.

In addition, in the hypochlorous acid water supply apparatus according to the present disclosure, the diaphragm-equipped electrolytic flow path includes a meandering first flow path in which the second positive electrode is exposed and extended along the flow path, and the first flow path and a meandering second flow path in which the second cathode extends along the flow path, and the first flow path and the second flow path are separated from each other, and a diaphragm permeable to cations contained in the solution flowing through the channel. The pair of second negative and positive electrodes are formed in a meandering shape by exposing the second positive electrode to the first channel by the first spacer member and exposing the second negative electrode to the second channel by the second spacer member. , the hypochlorous acid water supplied from the hypochlorous acid water generating unit is configured to flow in the same direction through the first flow path and the second flow path. According to such a configuration, the hypochlorous acid water generated by electrolyzing the salt water is circulated while applying a voltage in the same direction across the diaphragm, so that the hypochlorous acid water causes residual components. Ions can be separated and reduced. Therefore, it is possible to provide a hypochlorous acid water treatment unit capable of producing hypochlorous acid water in which residual components generated by electrolysis of salt water are reduced.

Further, the hypochlorous acid water supply device according to the present disclosure includes a planar second positive electrode, a planar diaphragm facing the second positive electrode, and provided between the second positive electrode and the diaphragm, a first spacer member exposing the second positive electrode and the diaphragm within the first flow channel along the flow channel, the first flow channel exposing the second positive electrode and the diaphragm and the first spacer along the flow channel; It is composed of members. Further, a planar second cathode, a planar diaphragm facing the second cathode, and a second electrode provided between the second cathode and the diaphragm to extend along the flow path into the second flow path. It has a second spacer member that exposes the cathode and the diaphragm, and the second flow path is composed of the second cathode and the diaphragm that are exposed along the flow path, and the second spacer member. By doing so, residual components can be removed from the hypochlorous acid water generated by electrolyzing salt water by the channel shape formed in the first spacer member and the channel shape formed in the second spacer member. Since the ability to separate cations that cause residual components can be changed, the area and time for separating cations that cause residual components from hypochlorous acid water can be freely designed.

Further, the hypochlorous acid water supply device according to the present disclosure is provided in a flow path that communicates and connects the hypochlorous acid water generation unit and the hypochlorous acid water treatment unit, and the hypochlorous acid water supply device is provided in the diaphragm electrolysis flow path. A supply pump for supplying hypochlorous acid water from the acid water generation unit is provided, and the supply pump supplies hypochlorous acid water from the hypochlorous acid water generation unit to the first flow path and the second flow path at a constant flow rate. preferably supplied. As a result, the time during which the voltage is applied in the first channel can be made constant, and the time during which the voltage is applied in the second channel can be made constant. For this reason, the concentration at which the cations that cause residual components in the hypochlorous acid water in the first flow channel are separated and diluted, and the cations that cause residual components in the hypochlorous acid water in the second flow channel concentration can be stabilized.

The spatial sterilization system according to the present disclosure is connected to the above-described hypochlorous acid water supply device and the first flow path, and uses the hypochlorous acid water sent from the first flow path to create a hypochlorous acid water mist. and a sterilization device that releases to a predetermined space. According to such a configuration, even if the mist of hypochlorous acid water delivered from the first flow path is discharged into the predetermined space, residual components remaining in the predetermined space are suppressed. In other words, since the hypochlorous acid water sent from the first flow path is hypochlorous acid water with reduced residual components generated by the electrolysis of salt water, sterilization performance is maintained when sterilizing a predetermined space. However, the occurrence of metal corrosion due to residual components can be suppressed.

Further, in the spatial disinfection system according to the present disclosure, a predetermined space is provided with a drain pipe for discharging water generated in the predetermined space, and the second flow path is connected to the drain pipe, The structure is such that the hypochlorous acid water sent out from the second channel can be introduced into the drain pipe. By doing so, hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated is removed from the hypochlorous acid water sent from the second flow path. Since the alkaline solution is circulated, the drain pipe can be washed with the alkaline solution.

Embodiment 2 includes at least Embodiments 2-1 and 2-2 below.

(Embodiment 2-1)
A hypochlorous acid water supply device 101 according to Embodiment 2-1 of the present disclosure will be described with reference to FIG. FIG. 7 is a cross-sectional image diagram of hypochlorous acid water supply device 101 according to Embodiment 2-1 of the present disclosure.

The hypochlorous acid water supply device 101 supplies salt water (aqueous sodium chloride solution), generates hypochlorous acid water by electrolysis, and further contains residual components (Na ⁺ ions, etc.) contained in the generated hypochlorous acid water. A component having a cation of (for example, NaClO, NaOH) can be separated and reduced from the hypochlorous acid water flowing inside and can be taken out and supplied in a single pass.

Specifically, as shown in FIG. 7, the hypochlorous acid water supply device 101 includes a hypochlorous acid water generation unit 102 that electrolyzes salt water to generate hypochlorous acid water in one pass, The hypochlorous acid water treatment unit 103 that separates and reduces the residual components contained in the chlorous acid water in a single pass, and the hypochlorous acid water generation unit 102. A positive electrode side supply pump 129 and a negative electrode side supply pump 131 for circulating hypochlorous acid water in the flow path of the processing unit 103 are provided.

<Hypochlorous acid water generation unit>
The hypochlorous acid water generating unit 102 constituting the hypochlorous acid water supply apparatus 101 will be described with reference to FIGS. 7 to 11. FIG. FIG. 8 is a schematic diagram of the hypochlorous acid water generation unit 102. As shown in FIG. FIG. 9 is an exploded perspective view of the hypochlorous acid water generating unit 102. FIG. FIG. 10 is a vertical cross-sectional image diagram of the hypochlorous acid water generating unit 102 . FIG. 11 is a horizontal cross-sectional image diagram of the hypochlorous acid water generating unit 102 .

As shown in FIGS. 8 to 11, the hypochlorous acid water generating unit 102 includes a first positive electrode 104, a first negative electrode 105, a first negative electrode spacer 106, and a first positive electrode packing 107a. , a first negative electrode packing 107b, a first positive electrode side tank housing side surface 108a, a first negative electrode side tank housing side surface 108b, a first negative electrode electrode solution supply port 109, and a first positive electrode solution. It has an extraction port 110 , a first cathode solution extraction port 111 , a first channel 112 between negative and positive electrodes, and an electrolysis power source 113 .

The first positive electrode 104 is a planar electrode plate. The surface of the electrode plate of the first positive electrode 104 is exposed along the channel 112 between the first positive and negative electrodes by the spacer 106 between the negative and positive electrodes. The first positive electrode 104 is an electrode that functions as an anode when current is passed by the electrolysis power source 113 . The first positive electrode 104 is arranged substantially parallel to and facing the first negative electrode 105 . The first positive electrode 104 has a platinum-containing catalyst formed on the surface of a titanium base material, and is made of a material that is highly efficient in generating hypochlorous acid by electrolysis. A platinum-containing catalyst is formed on at least the surface of the first positive electrode 104 exposed along the channel 112 between the first negative and positive electrodes. NaCl in salt water can be electrolyzed to produce hypochlorous acid water containing NaClO and HClO and NaOH.

The first cathode 105 is a planar electrode plate. The surface of the electrode plate of the first negative electrode 105 is exposed along the channel 112 between the first negative and positive electrodes by the spacer 106 between the first positive and negative electrodes. The first cathode electrode 105 is an electrode that functions as a cathode when current is passed by the electrolysis power source 113 . The first negative electrode 105 is arranged substantially parallel to and facing the first positive electrode 104 . The first negative electrode 105 forms a platinum-containing catalyst on its surface, similar to the first positive electrode 104 . A catalyst containing platinum is formed at least on the surface of the first negative electrode 105 exposed along the channel 112 between the first negative and positive electrodes. In addition, the first positive electrode 104 and the first negative electrode 105 in the region exposed along the channel 112 between the first negative and positive electrodes and subjected to electrolysis have the same shape, and the shorter the facing distance, the easier it is for the ions to move. It is also susceptible to electrolysis. If the facing distance is short, the flow rate in the flow path will decrease, and the amount of hypochlorous acid water that can be generated will also decrease. is desirable.

The first positive electrode 104 and the first negative electrode 105 constitute a first negative electrode as a pair of opposing electrodes.

The first cathode-positive electrode spacer 106 is an insulating member. The spacer 106 between the first negative and positive electrodes controls the distance between the first positive electrode 104 and the first negative electrode 105 to a predetermined distance. The first spacer between negative and positive electrodes 106 has a first channel hole 112a between negative and positive electrodes that forms a first channel between negative and positive electrodes 112 described later. The first cathode-positive electrode passage hole 112a is formed through the front and back surfaces of the first cathode-positive electrode spacer 106, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. ing. On the surface of the first spacer between negative and positive electrodes 106, a meandering packing member (Fig. not shown) is installed. The first cathode-positive electrode spacer 106 corresponds to the "spacer member" in the claims.

The first positive electrode packing 107a has a shape in which the outer periphery of the first positive electrode 104 is hollowed out to the size of the electrode, and is in close contact with the first negative electrode spacer 106 to form a flow path between the first positive electrode and the outer peripheral direction. A clamping pressure is applied so that the solution in 112 (the first positive and negative electrode supply solution 109a to be described later) does not leak. As the member of the first positive electrode packing 107a, insulating silicon rubber can be used. The first positive electrode packing 107a is thicker than the first positive electrode 104, and is crushed by being pressed by the tightening pressure to form the first positive electrode spacer 106 and the first positive electrode side tank housing side surface 108a. It is desirable that the thickness of the first positive electrode 104 is retained while the electrodes are in close contact with each other.

The packing 107b for the first negative electrode has a shape in which the outer periphery of the first negative electrode 105 is hollowed out to the size of the electrode. A clamping pressure is applied so that the solution in 112 (the first positive and negative electrode supply solution 109a to be described later) does not leak. The first negative electrode packing 107b is thicker than the first negative electrode 105, and is crushed by being pressed by the tightening pressure, thereby connecting the first negative electrode spacer 106 and the first negative electrode side tank housing side surface 108b. It is desirable that the thickness of the first cathode 105 be maintained while adhering to the .

The side surface 108 a of the first positive electrode side tank housing is arranged so as to be in direct contact with the outside of the first positive electrode 104 . The first positive electrode-side tank housing side surface 108a is provided on the inner surface of the first positive electrode-side tank housing side surface 108a in order to suppress penetration of the solution to the outside of the first positive electrode 104, and to improve adhesion. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur outside. Since the platinum-containing catalyst is formed only on the inner surface of the first positive electrode 104, the efficiency of electrolysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The side surface 108b of the first cathode-side tank housing is arranged so as to be in direct contact with the outside of the first cathode 105. The side surface 108b of the first cathode-side tank housing is provided with an inner surface of the first cathode-side tank housing side 108b in order to suppress penetration of the solution into the outside of the first cathode 105, and to improve adhesion. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the first cathode 105, the efficiency of electrolysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The first negative electrode solution supply port 109 is a connection port for flowing salt water to be electrolyzed into the first positive electrode inter-electrode channel 112, and is attached with a connector (not shown) to which a tube can be connected. In order to supply salt water from the outside of the first positive electrode 104 , the first negative electrode solution supply port 109 is processed at a position outside the first positive electrode 104 . The first negative electrode solution supply port 109 may be processed at a position on the outer circumference of the first negative electrode 105, or may be processed at a position outside both the first positive electrode 104 and the first negative electrode 105. good too.

The first positive and negative electrode supply solution 109a is salt water. The first negative electrode supply solution 109 a is introduced from the first negative electrode solution supply port 109 into the first channel 112 between the positive and negative electrodes.

The first positive electrode solution extraction port 110 is a connection port for extracting the electrolyzed first positive electrode extraction solution 110a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. It is connected to a side connection tube 128 and a positive electrode side supply pump 129 . In order to extract the first positive electrode extracting solution 110 a outside the first positive electrode 104 , the first positive electrode solution extracting port 110 is processed at a position outside the first positive electrode 104 .

The first positive electrode extraction solution 110a is hypochlorous acid water electrolyzed from salt water. The first positive electrode extraction solution 110a is introduced into the first positive electrode solution extraction port 110 from the first channel 112 between the positive and negative electrodes.

More specifically, the first positive electrode extraction solution 110a contains NaClO and HClO, which are components of hypochlorous acid water, generated by electrolyzing salt water. Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like. As the electrolysis of brine proceeds, the concentration of NaCl decreases and the concentrations of NaClO, HClO, and NaOH increase. Since HClO and NaOH react to form NaClO, hypochlorous acid water containing NaClO is produced when salt water is sufficiently electrolyzed. Components containing Na ⁺ ions, which are cations, become residual components after volatilization, and NaClO, NaOH, and NaCl are applicable as residual components generated by electrolysis of salt water.

The first cathode solution extraction port 111 is a connection port for extracting the electrolyzed first cathode extraction solution 111a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. It is connected to the side connection tube 130 and the cathode side supply pump 131 . In order to extract the first cathode extraction solution 111 a outside the first cathode 105 , the first cathode solution extraction port 111 is processed at a position outside the first cathode 105 .

The first cathode extraction solution 111a is hypochlorous acid water electrolyzed from salt water. The first negative electrode extraction solution 111 a is introduced into the first negative electrode solution extraction port 111 from the first channel 112 between the negative and positive electrodes.

More specifically, the first cathode extraction solution 111a contains NaClO and HClO, which are components of hypochlorous acid water, generated by electrolyzing salt water. Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like. As the electrolysis of brine proceeds, the concentration of NaCl decreases and the concentrations of NaClO, HClO, and NaOH increase. Since HClO and NaOH react to form NaClO, hypochlorous acid water containing NaClO is produced when salt water is sufficiently electrolyzed. Components containing Na ⁺ ions, which are cations, become residual components after volatilization, and NaClO, NaOH, and NaCl are applicable as residual components generated by electrolysis of salt water.

In the channel 112 between the first negative and positive electrodes, the electrolyzed hypochlorous acid water is mixed during the flow process, but a large amount of Cl ⁻ ions, which are the negative ion components of the salt water, are distributed near the first positive electrode 104 . However, in the vicinity of the first cathode 105, the salt water flows with a concentration gradient such that a large amount of Na ⁺ ions, which are cationic components of salt water, are distributed. Therefore, when electrolysis is performed between the first positive and negative electrodes, an acidic solution flows in the vicinity of the first positive electrode 104, and an alkaline solution flows in the vicinity of the first negative electrode. The first positive electrode solution extraction port 110 and the first negative electrode solution extraction port 111 correspond to the outer periphery of the first positive electrode 104 and the first negative electrode 105, so that they correspond to places where no voltage is applied. Since the first positive electrode solution extraction port 110 and the first negative electrode solution extraction port 111 are designed in the vicinity of one negative electrode 105, acid and alkaline hypochlorous acid water are extracted respectively. Specifically, acidic hypochlorous acid water containing a large amount of HCl and HClO is extracted as the first positive electrode extraction solution 110a from the first positive electrode solution extraction port 110 provided on the first positive electrode 104 side, and the first Alkaline hypochlorous acid water containing a large amount of NaOH is extracted from the first cathode solution extraction port 111 provided on the cathode 105 side as the first cathode extraction solution 111a.

Here, the first cathode electrode solution supply port 109 is preferably arranged on the lower side in the vertical direction, and the first positive electrode solution extraction port 110 and the first cathode electrode solution extraction port 111 are preferably arranged on the upper side in the vertical direction. should be placed in When oxygen gas, hydrogen gas, and the like are generated by the electrolysis reaction in the channel, the gas can be more efficiently discharged together with the solution if the extraction ports are arranged upward.

The first cathode-positive electrode flow path 112 is a flow path formed in a region surrounded by the first positive electrode 104, the first cathode-positive electrode spacer 106, and the first cathode electrode 105, and is a so-called non-diaphragm electrolytic flow path. is. The first channel 112 between the negative and positive electrodes is formed by the first channel hole 112 a between the negative and positive electrodes of the spacer 106 between the first negative and positive electrodes in a meandering manner. More specifically, the first channel between positive and negative electrodes 112 reciprocates in the horizontal direction, and the number of reciprocations in the horizontal direction increases the distance for electrolysis until the solution reaches from the bottom to the top. Furthermore, by reducing the channel width of the first cathode-positive electrode channel 112, the distance becomes longer, and the electrolysis time can be lengthened. In order to reduce the backflow of the liquid in the first channel 112 between the negative and positive electrodes, it is desirable that the first channel 112 between the positive and negative electrodes has a structure in which the first channel 112 between the negative and positive electrodes goes upward in one direction, except for reciprocating in the horizontal direction. The first channel 112 between the negative and positive electrodes has a first negative electrode solution supply port 109 on one side and a first positive electrode solution extraction port 110 and a first negative electrode solution extraction port 111 on the other side, A first negative electrode supply solution 109a is circulated inside. The amount of electrolysis is controlled by the applied voltage current and flow velocity in the channel. The flow rate can be controlled by installing a positive electrode side supply pump 129 after the first positive electrode solution extraction port 110 and installing a negative electrode side supply pump 131 after the first negative electrode solution extraction port 111 . . Each supply pump is desirably of a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By allowing the solution to flow at a constant flow rate, it is possible to control the electrolysis time in the flow channel at a constant level, so that the concentration of the hypochlorous acid water to be extracted can be stably controlled.

The electrolysis power supply 113 is a DC power supply that is connected to the first positive electrode 104 and the first negative electrode 105 and can apply current and voltage to the first positive electrode 104 and the first negative electrode 105 . The electrolysis power supply 113 may be used as a constant current controlled power supply so as to provide a constant current, or may be used as a constant voltage controlled power supply so as to provide a constant voltage. In order to reduce scale accumulation, the electrolysis power source 113 switches the potentials of the first positive electrode 104 and the first negative electrode 105 each time salt water is passed through the hypochlorous acid water generating unit 102, for example. It may be controlled to reverse polarity and dissolve adhering scale.

As described above, the hypochlorous acid water generation unit 102 is composed of each member.

<Hypochlorous acid water supply unit>
Next, the hypochlorous acid water treatment unit 103 constituting the hypochlorous acid water supply device 101 will be described with reference to FIGS. 7 and 12 to 15. FIG. FIG. 12 is a schematic diagram of the hypochlorous acid water treatment unit 103. As shown in FIG. FIG. 13 is an exploded perspective view of the hypochlorous acid water treatment unit 103. FIG. FIG. 14 is a vertical cross-sectional image diagram of the hypochlorous acid water treatment unit 103 . FIG. 15 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment unit 103 .

The hypochlorous acid water treatment unit 103, as shown in FIGS. Electrode-side spacer 118, second positive electrode packing 119a, second negative electrode packing 119b, second positive electrode-side tank housing side surface 120a, second negative electrode-side tank housing side surface 120b, and second positive electrode A solution supply port 121, a second positive electrode solution extraction port 122, a second negative electrode solution supply port 123, a second negative electrode solution extraction port 124, a second positive electrode side channel 125, and a second negative electrode. A side channel 126 and an electrodialysis power supply 127 are provided.

The second positive electrode 114 is a planar electrode plate. The surface of the electrode plate of the second positive electrode 114 is exposed along the channel of the second positive electrode-side channel 125 by the second positive electrode-side spacer 117 . Second positive electrode 114 is an electrode that functions as an anode when current is passed by electrodialysis power supply 127 . The second positive electrode 114 is arranged substantially parallel to and facing the second negative electrode 115 . The second positive electrode 114 has a platinum-containing catalyst formed on the surface of a titanium base material, and is made of a material that is highly efficient in generating hypochlorous acid by electrolysis. The platinum-containing catalyst is formed at least on the surface of the second positive electrode 114 exposed along the channel of the second positive electrode side channel 125 . The main purpose is to move cations by electrodialysis to generate hypochlorous acid water that suppresses NaClO and NaOH as residual components, but NaCl and salt water generated by decomposition of NaClO are electrolyzed. NaCl remaining without being dissolved can also be changed to hypochlorous acid by the platinum electrode.

The second cathode 115 is a planar electrode plate. The surface of the electrode plate of the second cathode 115 is exposed along the channel of the second cathode side channel 126 by the second cathode side spacer 118 . The second cathode electrode 115 is the electrode that functions as a cathode when current is passed by the electrodialysis power supply 127 . The second negative electrode 115 is arranged substantially parallel to and facing the second positive electrode 114 . The second negative electrode 115 forms a platinum-containing catalyst on its surface, similar to the second positive electrode 114 . The platinum-containing catalyst is formed at least on the surface of the second cathode 115 exposed along the channel 126 on the second cathode side. In addition, the second positive electrode 114 and the second negative electrode 115 in the region where electrodialysis is performed by exposing them along the second positive electrode side channel 125 and the second negative electrode side channel 126 have the same shape. The shorter the length, the easier it is for ions to move. If the facing distance is short, the flow rate in the flow path will decrease, and the amount of hypochlorous acid water that can be generated will also decrease. is desirable.

The second positive electrode 114 and the second negative electrode 115 constitute a second negative electrode as a pair of opposing electrodes.

The diaphragm 116 is a planar thin film. The diaphragm 116 is arranged substantially parallel to and facing the second positive electrode 114 and the second negative electrode 115 . The diaphragm 116 is provided so as to separate the second positive electrode side channel 125 and the second negative electrode side channel 126 . The diaphragm 116 is an ion exchange membrane (cation exchange membrane) capable of transferring cations such as Na ⁺ ions related to NaClO and NaOH, which are residual components of hypochlorous acid water. The diaphragm 116 can move positive ions to the second negative electrode 115 by applying a voltage to the second positive electrode 114 and the second negative electrode 115 . Examples of the cation exchange membrane include Nafion manufactured by DuPont. Since the cations are concentrated on the second negative electrode 115 side, there is a possibility that scale components contained in tap water or the like may be deposited during long-term use. In order to reduce scale accumulation, for example, each time hypochlorous acid water is passed through the hypochlorous acid water treatment unit 103, the potentials of the second positive electrode 114 and the second negative electrode 115 are switched to reverse polarity, Dissolve attached scale. When it is assumed that the electrodes will be used with their polarities reversed, it is desirable that the second positive electrode 114 and the second negative electrode 115 be similarly treated with a catalyst containing platinum.

The second positive electrode side spacer 117 is an insulating member. The second positive electrode side spacer 117 controls the distance between the second positive electrode 114 and the diaphragm 116 to a predetermined distance. The second positive electrode side spacer 117 has, inside the second positive electrode side spacer 117, a second positive electrode side channel hole 125a that forms a second positive electrode side channel 125, which will be described later. The second positive electrode side channel hole 125 a is a hole that forms the second positive electrode side channel 125 formed in the second positive electrode side spacer 117 . The second positive electrode side channel hole 125a is formed through the front and back of the second positive electrode side spacer 117, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. ing. In addition, on the surface of the second positive electrode side spacer 117, a meandering packing member (not shown), which is the same as the second positive electrode side spacer 117, is provided on the surface of the second positive electrode side spacer 117 in order to improve adhesion between the second positive electrode side 114 and the diaphragm 116. is installed. The second positive electrode side spacer 117 corresponds to the "first spacer member" in the claims.

The second cathode side spacer 118 is an insulating member. The second cathode side spacer 118 controls the distance between the second cathode 115 and the diaphragm 116 . The second cathode side spacer 118 has a second cathode side channel hole 126a inside the second cathode side spacer 118 that forms a second cathode side channel 126, which will be described later. The second cathode side channel hole 126 a is a hole that forms the second cathode side channel 126 formed in the second cathode side spacer 118 . The second cathode-side channel hole 126a is formed through the front and back of the second cathode-side spacer 118, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. ing. Here, the second negative electrode side channel hole 126a and the second positive electrode side channel hole 125a are arranged so as to face each other. Also, on the surface of the second cathode-side spacer 118, a meandering packing member (not shown), which is the same as the second cathode-side spacer 118, is provided in order to increase the adhesion between the second cathode 115 and the diaphragm 116. is installed. The second cathode-side spacer 118 corresponds to the "second spacer member" in the claims.

The second positive electrode packing 119a has a shape in which the outer periphery of the second positive electrode 114 is hollowed out to the size of the electrode. It is attached with tightening pressure so that the solution in 125 (the second positive electrode supply solution 121a to be described later) does not leak. As a member of the second positive electrode packing 119a, insulating silicon rubber can be used. The second positive electrode packing 119a is thicker than the second positive electrode 114, and is crushed by being pressed by the tightening pressure to form the second positive electrode side spacer 117 and the second positive electrode side tank housing side surface 120a. It is desirable that the thickness of the second positive electrode 114 is retained while the electrodes are in close contact with each other.

The second cathode packing 119b has a shape in which the outer circumference of the second cathode 115 is hollowed out to the size of the electrode. It is attached with tightening pressure so that the solution inside (the second cathode supply solution 123a to be described later) does not leak. As the member of the second cathode packing 119b, insulating silicone rubber can be used. The second cathode packing 119b is thicker than the second cathode 115, and is crushed by the tightening pressure so that the second cathode side spacer 118 and the second cathode side tank housing side face 120b are crushed. It is desirable that the thickness of the second cathode 115 be maintained while adhering to the second cathode 115 .

The second positive electrode side tank housing side surface 120a is arranged so as to be in direct contact with the outside of the second positive electrode 114 . The second positive electrode-side tank housing side surface 120a is provided on the inner surface of the second positive electrode-side tank housing side surface 120a in order to suppress penetration of the solution to the outside of the second positive electrode 114, and to improve adhesion. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the second positive electrode 114, the efficiency of electrodialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The second cathode side tank housing side surface 120b is arranged so as to be in direct contact with the outside of the second cathode 115 . The second cathode-side tank housing side surface 120b is provided with an inner surface of the second cathode-side tank housing side surface 120b in order to prevent the solution from permeating to the outside of the second cathode 115, and to improve adhesion. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the second cathode 115, the efficiency of electrode dialysis can be improved if the solution can be prevented from flowing out of the electrode.

The second positive electrode solution supply port 121 is a connection port for flowing the second positive electrode supply solution 121a to be electrodialyzed into the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to supply the second positive electrode supply solution 121 a from the outside of the second positive electrode 114 , the second positive electrode solution supply port 121 is processed at a position outside the second positive electrode 114 .

The second positive electrode supply solution 121 a is hypochlorous acid water electrolyzed from salt water in the hypochlorous acid water generation unit 102 . More specifically, the second positive electrode supply solution 121a is the first positive electrode extraction solution 110a supplied from the first positive electrode solution extraction port 110, and is acidic hypochlorous acid water containing a large amount of HCl and HClO. be. The second positive electrode supply solution 121 a is introduced from the second positive electrode solution supply port 121 into the second positive electrode side channel 125 .

The second positive electrode solution extraction port 122 is a connection port for extracting the electrodialyzed second positive electrode extraction solution 122a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the second positive electrode extracting solution 122 a outside the second positive electrode 114 , the second positive electrode solution extracting port 122 is processed at a position outside the second positive electrode 114 .

The second positive electrode extraction solution 122a is hypochlorous acid water containing HClO as a main component. The second positive electrode extraction solution 122 a is introduced into the second positive electrode solution extraction port 122 from the second positive electrode side channel 125 .

More specifically, the second positive electrode extracting solution 122a causes the second positive electrode supply solution 121a to flow through the second positive electrode-side channel 125, and the second positive electrode supply solution 121a is extracted from the second positive electrode supply solution 121a. It is a solution in which ions are separated and diluted. Since hypochlorous acid water (first positive electrode extraction solution 110a) generated by electrolyzing salt water in the hypochlorous acid water generating unit is used as the second positive electrode supply solution 121a, the second positive electrode In the extraction solution 122a, Na ⁺ ions, which are cations, are separated and diluted to form hypochlorous acid water containing HClO as a main component. pH indicates acidity.

The second cathode solution supply port 123 is a connection port for flowing the second cathode supply solution 123a to be electrodialyzed into the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to supply the second cathode supply solution 123 a from the outside of the second cathode 115 , the second cathode solution supply port 123 is processed at a position outside the second cathode 115 .

The second cathode supply solution 123 a is hypochlorous acid water electrolyzed from salt water in the hypochlorous acid water generation unit 102 . More specifically, the second cathode supply solution 123a is the first cathode extraction solution 111a supplied from the first cathode solution extraction port 111, and is alkaline hypochlorous acid water containing a large amount of NaOH. The second cathode supply solution 123 a is introduced from the second cathode solution supply port 123 into the second cathode side channel 126 .

The second cathode solution extraction port 124 is a connection port for extracting the electrodialyzed second cathode extraction solution 124a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the second cathode extraction solution 124 a outside the second cathode 115 , the second cathode solution extraction port 124 is processed at a position outside the second cathode 115 .

The second cathode extraction solution 124a is hypochlorous acid water containing NaClO and NaOH as main components. The second cathode extraction solution 124 a is led out from the second cathode side channel 126 to the second cathode solution extraction port 124 .

More specifically, the second cathode extraction solution 124a is a solution in which the second cathode supply solution 123a is circulated through the second cathode-side channel 126 to concentrate the cations that cause residual components. be. Since the hypochlorous acid water (first cathode extraction solution 111a) generated by electrolyzing salt water in the hypochlorous acid water generation unit 102 is used as the second cathode supply solution 123a, the second cathode In the electrode extracting solution 124a, Na ⁺ ions, which are cations, are separated and concentrated to generate NaOH, resulting in hypochlorous acid water containing NaOH and NaClO as main components. pH indicates alkaline.

Here, the second positive electrode solution supply port 121 and the second negative electrode solution supply port 123 are preferably arranged on the lower side in the vertical direction, and the second positive electrode solution extraction port 122 and the second negative electrode solution extraction The port 124 is desirably positioned vertically upward. When oxygen gas, hydrogen gas, and the like are generated by the electrodialysis reaction and the electrolysis reaction in the flow path, the gas can be more efficiently discharged together with the solution if the extraction port is arranged above.

The second positive electrode side channel 125 is a channel formed by the area surrounded by the second positive electrode 114 , the second positive electrode side spacer 117 and the diaphragm 116 . The second positive electrode side channel 125 is formed in a meandering manner by the second positive electrode side channel hole 125 a of the second positive electrode side spacer 117 . More specifically, the second positive electrode-side channel 125 reciprocates in the horizontal direction, and the number of horizontal reciprocations until the anode-side solution reaches from the bottom to the top increases the distance for electrodialysis. Furthermore, by reducing the channel width of the second positive electrode side channel 125, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the second positive electrode-side channel 125, it is desirable that the second positive electrode-side channel 125 has a structure in which the second positive electrode-side channel 125 goes from bottom to top in one direction, except for reciprocating in the horizontal direction. The second positive electrode-side channel 125 is provided with the second positive electrode solution supply port 121 on one side and the second positive electrode solution extraction port 122 on the other side. A positive electrode supply solution 121a is circulated. The second positive electrode side flow path 125 corresponds to the "first flow path" in the claims.

The second cathode-side channel 126 is a channel formed by a region surrounded by the second cathode 115 , the second cathode-side spacer 118 and the diaphragm 116 . The second cathode-side channel 126 is formed by meandering second cathode-side channel holes 126 a of the second cathode-side spacer 118 . More specifically, the second cathode-side channel 126 reciprocates in the horizontal direction, and the distance for electrodialysis is obtained by the number of horizontal reciprocations until the cathode-side solution reaches from the bottom to the top. Further, by reducing the channel width of the second cathode side channel 126, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the second cathode-side channel 126, it is desirable that the second cathode-side channel 126 has a structure in which liquid flows in one direction from bottom to top except for reciprocation in the horizontal direction. The second cathode-side channel 126 has a second cathode solution supply port 123 on one side and a second cathode solution extraction port 124 on the other side. A cathode supply solution 123a is circulating. The second cathode-side channel 126 corresponds to the "second channel" in the claims.

The second positive electrode side channel 125 and the second negative electrode side channel 126 face each other in a symmetrical shape with the diaphragm 116 interposed therebetween. That is, the second positive electrode side channel 125 and the second negative electrode side channel 126 are formed in meandering shapes facing each other with the diaphragm 116 interposed therebetween. In this manner, the second positive electrode side channel 125 and the second negative electrode side channel 126 constitute a so-called membrane electrolysis channel. Then, the Na ⁺ ions contained in the hypochlorous acid water flowing through the second positive electrode side channel 125 move to the second negative electrode side channel 126 side. The amount of ion movement is controlled by the applied voltage and current and the flow velocity in the channel. The flow rate can be controlled by installing a positive electrode side supply pump 129 in front of the second positive electrode solution supply port 121 and installing a negative electrode side supply pump 131 in front of the second negative electrode solution supply port 123 . . Each pump is desirably of a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By flowing the solution at a constant flow rate, it is possible to control the electrodialysis and electrolysis time in the flow channel constantly, so that the concentration of the hypochlorous acid water to be extracted can be stably controlled.

The electrodialysis power supply 127 is a DC power supply that is connected to the second positive electrode 114 and the second negative electrode 115 and can apply current and voltage to the second positive electrode 114 and the second negative electrode 115 . The electrodialysis power supply 127 may be used as a constant current controlled power supply so as to provide a constant current, or may be used as a constant voltage controlled power supply so as to provide a constant voltage. In order to reduce scale accumulation, the electrodialysis power supply 127 is connected to the second positive electrode 114 and the second negative electrode 115 each time the hypochlorous acid water is supplied to the hypochlorous acid water treatment unit 103, for example. It may be controlled to switch the potential to reverse the polarity and dissolve the adhering scale.

As shown in FIG. 7, the positive electrode side connection tube 128 is connected to the hypochlorous acid water treatment unit via the first positive electrode solution extraction port 110 of the hypochlorous acid water generation unit 102 and the positive electrode side supply pump 129. It is a tube that connects 103 with the second positive electrode solution supply port 121 . The positive electrode side connection tube 128 converts the hypochlorous acid water (first positive electrode extraction solution 110a) generated in the hypochlorous acid water generation unit 102 by the operation of the positive electrode side supply pump 129 into hypochlorous acid. The solution is sent to the second positive electrode solution supply port 121 of the acid water treatment unit 103 . A silicon tube or the like, for example, can be used for the positive electrode side connection tube 128 .

The negative electrode side connection tube 130 connects the first negative electrode solution extraction port 111 of the hypochlorous acid water generation unit 102 and the second negative electrode solution of the hypochlorous acid water treatment unit 103 via the negative electrode side supply pump 131 . It is a tube that connects with the supply port 123 . The cathode-side connection tube 130 connects the hypochlorous acid water ((first cathode extraction solution 111a) generated in the hypochlorous acid water generation unit 102 to the second cathode of the hypochlorous acid water treatment unit 103. The liquid is sent to the solution supply port 123. The negative electrode side connection tube 130 can use, for example, a silicon tube.

For the positive electrode side connection tube 128 and the negative electrode side connection tube 130, for example, tubes having the same inner diameter and the same length are used so that there is no difference in the flow rate and flow velocity of the solution flowing inside.

The positive electrode side supply pump 129 is a pump that generates a flow that supplies the first positive electrode extraction solution 110a generated in the hypochlorous acid water generation unit 102 as the second positive electrode supply solution 121a. More specifically, the positive electrode side supply pump 129 has a first negative electrode solution supply port 109, a first positive electrode inter-electrode channel 112, a first positive electrode solution extraction port 110, a second positive electrode solution supply port 121, a Each solution (salt water, first negative electrode supply solution 109a, first positive electrode extraction solution 110a, second positive electrode supply solution 121a, A second positive electrode extraction solution 122a) is caused to flow. At this time, the positive electrode side supply pump 129 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generation unit 102, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment unit 103 to be constant. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The cathode side supply pump 131 is a pump that generates a flow that supplies the first cathode extraction solution 111a generated in the hypochlorous acid water generation unit 102 as the second cathode supply solution 123a. More specifically, the cathode-side supply pump 131 has a first anode-positive electrode solution supply port 109, a first cathode-positive electrode channel 112, a first cathode solution extraction port 111, a second cathode solution supply port 123, a second Each solution (salt water, first negative electrode supply solution 109a, first negative electrode extraction solution 111a, second positive electrode extraction solution 122a, A second cathodic extraction solution 124a) is caused to flow. At this time, the cathode-side supply pump 131 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating unit 102, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment unit 103 to be constant. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The flow rate of the first cathode-positive electrode channel 112 is controlled as the total amount of the positive electrode-side supply pump 129 and the negative electrode-side supply pump 131 . Also, the positive electrode side supply pump 129 and the negative electrode side supply pump 131 correspond to the "supply pump" in the claims.

As described above, the hypochlorous acid water treatment unit 103 is composed of each member.

As shown in FIG. 7, the hypochlorous acid water supply device 101 has a flow path on the positive electrode side of each unit between the hypochlorous acid water generation unit 102 and the hypochlorous acid water treatment unit 103 described above. , and connected via a negative electrode side connection tube 130 provided in the channel on the negative electrode side of each unit. The hypochlorous acid water supply device 101 continuously introduces salt water into the hypochlorous acid water generation unit 102, and continuously supplies the hypochlorous acid water from the hypochlorous acid water treatment unit 103 to the outside. do. More specifically, the hypochlorous acid water supply device 101 electrolyzes the salt water that is continuously introduced into the hypochlorous acid water generation unit 102 to produce a second The second positive electrode extraction solution 122a delivered from the two positive electrode side channel 125 is supplied to the outside as acidic hypochlorous acid water. In addition, the hypochlorous acid water supply device 101 converts the second cathode extraction solution 124a delivered from the second cathode side channel 126 on the cathode side of the hypochlorous acid water treatment unit 103 into alkaline hypochlorous acid. Supplied to the outside as acid water.

Next, referring to FIGS. 10 and 11, the processing operation in the hypochlorous acid water generation unit 102 will be described.

As shown in FIGS. 10 and 11, in the hypochlorous acid water generating unit 102, a first negative electrode supply solution 109a, which is salt water, passes through a first negative electrode solution supply port 109 and flows into a first negative electrode flow path 112. continuously supplied to Then, the first negative electrode supply solution 109a supplied from the first negative electrode solution supply port 109 flows through the first channel 112 between the positive and negative electrodes which is formed meandering. At this time, the supply solution 109a for the first negative and positive electrodes flows through the channel 112 between the first positive and negative electrodes, and at the same time, a voltage is applied to the first positive electrode 104 and the first negative electrode 105 at both ends. When a voltage is applied, anions (Cl ⁻ ions) are attracted to the first positive electrode 104 side, and positive ions (Na ⁺ ions) are attracted to the first negative electrode 105 side, and the first positive electrode 104 is electrolyzed. HCl and HClO are produced on the side, and NaOH is produced on the first cathode 105 side. Further, HClO and NaOH react to generate NaClO. By repeating this, hypochlorous acid water containing NaClO as the main component and containing HClO, NaOH, and residual NaCl is produced.

In the processing operation in the hypochlorous acid water generation unit 102, the electrolysis time is lengthened in the channel 112 between the first positive and negative electrodes, thereby increasing the amount of electrolysis of NaCl and extracting the first positive electrode. Residual NaCl (brine) in solution 110a and first cathode extraction solution 111a can be reduced. In order to lengthen the electrolysis time, it is necessary to increase the distance of the first channel 112 between the negative and positive electrodes. It is formed in a meandering manner, and the distance for electrolysis is earned by the number of horizontal reciprocations until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional area of the first cathode-positive electrode channel 112, the distance can be lengthened, and the electrolysis time can be lengthened.

Next, the treatment operation in the hypochlorous acid water treatment unit 103 will be described with reference to FIGS. 14 and 15. FIG.

As shown in FIGS. 14 and 15, in the hypochlorous acid water treatment unit 103, the second positive electrode supply solution 121a, which is hypochlorous acid water, passes through the second positive electrode solution supply port 121 to the second positive electrode. The second cathode supply solution 123a, which is hypochlorous acid water, is continuously supplied to the side channel 125 and is continuously supplied to the second cathode side channel 126 through the second cathode solution supply port 123. be done. Then, the second positive electrode supply solution 121a supplied from the second positive electrode solution supply port 121 flows through the meandering second positive electrode side channel 125, and flows through the second negative electrode solution supply port. A second cathode supply solution 123a supplied from 123 flows through a second cathode side channel 126 which is also formed in a meandering manner. At this time, the second positive electrode supply solution 121a and the second negative electrode supply solution 123a face each other across the diaphragm 116 and flow in the same direction to form the second positive electrode side channel 125 and the second negative electrode side channel 125, respectively. 126, a voltage is applied to the second positive electrode 114 and the second negative electrode 115 at both ends. When a voltage is applied, negative ions are attracted to the second positive electrode 114 side and positive ions (Na ⁺ ions) are attracted to the second negative electrode 115 side. Since the diaphragm 116 is composed of a membrane that is permeable only to cations, the cations (Na ⁺ ions) contained in the second positive electrode supply solution 121a flowing through the second positive electrode-side channel 125 are 116, and passes through the second cathode supply solution 123a in the second cathode side channel 126 and is attracted to the second cathode 115 side. On the contrary, since the anions flowing through the second negative electrode side channel 126 cannot pass through the diaphragm 116, only the anions contained in the second positive electrode side channel 125 are attracted to the second positive electrode 114. By repeating this, the cations (Na 2 ⁺ ions) contained in the second positive electrode supply solution 121a flowing through the second positive electrode-side channel 125 are converted to the second negative electrode flowing through the second negative electrode-side channel 126. Electrodialysis progresses by moving to the electrode supply solution 123a, and the second positive electrode supply solution 121a flowing through the second positive electrode-side channel 125 has cations (Na ^{2 +} ions) separated and diluted to form a second negative electrode supply solution 121a. The second cathode supply solution 23a that flows through the electrode-side channel 126 is extracted with concentrated cations (Na ⁺ ions). As a result, from the second positive electrode solution extraction port 122, as the second positive electrode extraction solution 122a, the residual components NaClO and NaOH are separated and diluted, and the hypochlorous acid water containing the HClO component as the main component is extracted. be. Conversely, from the second cathode solution extraction port 124, the Na ⁺ ions constituting the residual components are concentrated and NaOH is generated as the second cathode extraction solution 124a from the second cathode solution extraction port 124. ) is extracted.

In the treatment operation in the hypochlorous acid water treatment unit 103, by increasing the electrodialysis time in the second positive electrode side channel 125 and the second negative electrode side channel 126, cations (Na ⁺ ions ) can be moved more to further reduce the residual components of NaClO and NaOH in the second positive electrode extraction solution 122a. In order to lengthen the electrodialysis time, it is necessary to lengthen the distances of the second positive electrode side channel 125 and the second negative electrode side channel 126. It is formed in a meandering manner so that it rises one by one, and the distance for electrodialysis is earned by the number of horizontal reciprocations until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional areas of the second positive electrode side channel 125 and the second negative electrode side channel 126, the distance becomes longer, and the electrodialysis time can be lengthened.

The pumps are controlled so that the flow rates of the solutions passing through the second positive electrode side channel 125 and the second negative electrode side channel 126 are the same, but they may be different. Different flow rates affect the concentration of each solution extracted. For example, when the flow velocity in the second positive electrode side channel 125 is relatively increased and the flow velocity in the second negative electrode side channel 126 is relatively decreased, the second positive electrode side channel 125 and the second The second cathode extraction solution 124a extracted from the second cathode-side channel 126 is smaller and has a higher concentration than when the two-cathode-side channel 126 has the same flow rate. Therefore, when the second cathode extraction solution 124a is drained, it is desirable to slow down the flow velocity of the second cathode side channel 126. FIG.

Next, referring to FIGS. 16A to 16C, the hypochlorous acid water supply device 101 (the hypochlorous acid water generation unit 102 and the hypochlorous acid water treatment unit 103) is actually circulated to supply the second positive electrode. The properties of the hypochlorous acid water (conductivity, pH, and effective chlorine concentration) of the second positive electrode extraction solution 122a and the second negative electrode extraction solution 124a extracted from the solution extraction port 122 and the second negative electrode solution extraction port 124, respectively ) will be explained. 16A to 16C are diagrams showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply device 101 and the electrodialysis time. More specifically, FIG. 16A is a diagram showing the relationship between electrodialysis time and electrical conductivity by the hypochlorous acid water supply device 101. FIG. FIG. 16B is a diagram showing the relationship between electrodialysis time and pH by the hypochlorous acid water supply device 101. FIG. FIG. 16C is a diagram showing the relationship between the electrodialysis time and available chlorine concentration by the hypochlorous acid water supply device 101. FIG.

In the experimental evaluation in FIGS. 16A to 16C, the hypochlorous acid water generating unit 102 was formed with the first cathode-positive electrode channel 112 having a channel cross-sectional area of 26 mm ² and a channel length of 675 mm. A hypochlorous acid water treatment unit 103 in which a second positive electrode side channel 125 and a second negative electrode side channel 126 having a channel cross-sectional area of 8 mm ² and a channel length of 675 mm were formed was used. In addition, as the flow rate conditions of the positive electrode side supply pump 129 and the negative electrode side demand pump 31, both are circulated at flow rates of 153 mL / h and 250 mL / h, and the electrolysis time of the hypochlorous acid water generation unit 102 is And the electrodialysis time of the hypochlorous acid water treatment unit 103 was adjusted, and the conductivity, pH, and effective chlorine concentration of the second positive electrode extraction solution 122a and the second negative electrode extraction solution 124a were measured.

The salt water of the first negative and positive electrode supply solution 109a supplied to the first negative and positive electrode solution supply port 109 has a conductivity of 405 μS/cm, a pH of 6.7, an available chlorine concentration of 0 ppm, and a chloride ion concentration of 138 ppm. I used what would be Electrolysis and electrodialysis were performed using a power source capable of applying a constant current of 0.2 A as the electrolysis power source 113 and the electrodialysis power source 127 . Here, the electrolysis time refers to the time during which the solution is in direct contact with the first positive electrode 104 and the first negative electrode 105 in the channel, and the longer the electrolysis time, the slower the flow rate. . Also, the electrodialysis time refers to the time during which the solution is in direct contact with the second positive electrode 114 and the second negative electrode 115 in the channel, and the longer the electrodialysis time, the slower the flow rate. This time, electrodialysis was performed by setting the flow rate on the anode side and the cathode side to be the same.

Looking at the transition of the conductivity shown in FIG. 16A, the longer the electrodialysis time, in other words, the slower the flow rate, the more the conductivity of the second positive electrode extraction solution 122a extracted from the second positive electrode solution extraction port 122 (the anode side ) decreases, and the conductivity of the cathode-side extraction solution 12a extracted from the cathode-side solution extraction port 12 (cathode-side conductivity) increases. This is contained in the anode side solution when the hypochlorous acid water generated in the hypochlorous acid water generation unit 102 is circulated through the second positive electrode side channel 125 of the hypochlorous acid water treatment unit 103 It is thought that Na ⁺ ions, which are cations, migrated through the diaphragm 116 to the cathode side, and changed from NaClO to HClO on the anode side, resulting in a decrease in electrical conductivity. NaClO ionizes into Na ⁺ ions and ClO 2 ⁻ ions, but since HClO mainly exists as a molecule, the conductivity decreases when NaClO changes to HClO.

Looking at the transition of pH shown in FIG. It is changing to the alkaline side. This suggests the effect of conversion to HClO on the anode side. The reason why the pH on the anode side becomes closer to neutral as the electrodialysis time increases is thought to be that the slight amount of chloride ions remaining in the solution are converted to hypochlorous acid by electrolysis. On the other hand, on the cathode side, NaOH is formed by movement of Na ⁺ ions, and the cathode side becomes alkaline.

Looking at the transition of the effective chlorine concentration shown in FIG. 16C, the effective chlorine concentration of the second positive electrode extraction solution 122a (the effective chlorine concentration on the anode side) increases with the electrodialysis time. Under the flow velocity conditions in which the conductivity is reduced to 405 μS/cm or less shown in FIG. 16A, the rate of increase in available chlorine concentration is reduced, and it is considered that the conversion to HClO has been completed. Similarly, for the second cathode extraction solution 124a, the available chlorine concentration (available chlorine concentration on the cathode side) increases with the electrodialysis time. This is because when the flow velocities of the positive electrode side supply pump 129 and the negative electrode side supply pump 131 slow down, the electrolysis time in the hypochlorous acid water generation unit 102 increases and the amount of hypochlorous acid water generated increases. The reason for this is thought to be that the amount of hypochlorous acid water extracted from the second cathode solution extraction port 124 of the hypochlorous acid water treatment unit 103 also increases.

The hypochlorous acid water supply device 101 simultaneously extracts hypochlorous acid water mainly composed of HClO with high sterilizing power from the anode side and hypochlorous acid water mainly composed of NaClO and NaOH with high detergency from the cathode side. can do. Hypochlorous acid water containing mainly HClO is a solution in which residual components are suppressed, and it is possible to suppress metal corrosion caused by residual components even during space spraying while maintaining sterilization power. On the other hand, hypochlorous acid water containing NaClO and NaOH as a main component cannot be sprayed in space because it is a solution that leaves residual components, but it is a solution with high detergency and is effective in washing areas with acidic dirt such as drains. can bring In the hypochlorous acid water treatment device 1, hypochlorous acid water mainly composed of HClO generated on the anode side is used for space sterilization, while hypochlorous acid mainly composed of NaClO and NaOH is generated on the cathode side on the opposite side. Water can also be used for cleaning.

As described above, according to the hypochlorous acid water supply device 101 according to Embodiment 2-1, the following effects can be enjoyed.

(1) The hypochlorous acid water supply device 101 supplies salt water to the meandering diaphragmless electrolysis flow path (first anode-positive electrode flow path 112) between the pair of first cathode and cathode electrodes (first positive electrode). 104 and the first negative electrode 105), a hypochlorous acid water generating unit 102 for continuously electrolytically generating hypochlorous acid water by energizing the current, and a meandering diaphragm electrolysis flow path (second positive electrode Hypochlorous acid water supplied from the hypochlorous acid water generation unit 102 is supplied to each of the side flow path 125 and the second negative electrode side flow path 126 between the pair of second negative and positive electrodes (second positive electrode 114 and and a hypochlorous acid water treatment unit 103 that continuously treats by energizing (between the second cathode 115). The structure is such that the hypochlorous acid water sent out from the electrolysis channel (second positive electrode side channel 125) on the positive electrode side of the hypochlorous acid water treatment unit 103 is supplied to the outside.

According to such a configuration, in the hypochlorous acid water generation unit 102, salt water is electrolyzed in the non-diaphragm electrolysis channel (the first channel between the negative and positive electrodes 112) to generate hypochlorous acid water, and the diaphragm Hypochlorous acid water generated in the non-diaphragm electrolysis flow path is circulated in the electrolysis flow path (the second positive electrode side flow path 125 and the second negative electrode side flow path 126), and the factor of the residual component is removed from the positive electrode side. It can be extracted as hypochlorous acid water in which the cations that become are separated and reduced. Therefore, the hypochlorous acid water supply device 101 of the one-pass type can be provided, which can supply the hypochlorous acid water from which the residual components generated by the electrolysis of the salt water are separated to the outside.

In addition, in the hypochlorous acid water supply device 101, each flow path (non-diaphragm electrolysis flow path and diaphragm electrolysis flow path) has a meandering shape, so that the salt water and the hypochlorous acid water come into contact with the electrodes and the diaphragm, respectively. As a result, the distance and time for electrolysis of salt water and separation of cations that cause residual components from hypochlorous acid water can be lengthened. In other words, the electrolysis of salt water and the separation of cations that cause residual components from hypochlorous acid water can be efficiently performed with respect to the size of the electrode.

(2) In the hypochlorous acid water supply device 101, the non-diaphragm electrolysis flow path (the first cathode-positive electrode flow path 112) of the hypochlorous acid water generation unit 102 includes a planar first positive electrode 104 and a second It is composed of a planar first negative electrode 105 facing one positive electrode 104 and a first positive electrode spacer 106 provided between the first positive electrode 104 and the first negative electrode 105 . . A pair of first negative and negative electrodes (first positive electrode 104 and first negative electrode 105) are exposed to the non-diaphragm electrolytic flow path by a spacer 106 between first negative and positive electrodes. It was configured in a meandering shape. In this way, the ability to electrolyze salt water can be changed by changing the shape of the channel formed in the first spacer between negative and positive electrodes 106, so that the area and time for electrolyzing salt water can be freely designed. be able to.

(3) In the hypochlorous acid water supply device 101, the diaphragm electrolysis flow path (the second positive electrode side flow path 125 and the second negative electrode side flow path 126) of the hypochlorous acid water treatment unit 103 is connected to the second A meandering second positive electrode-side channel 125 in which the positive electrode 114 is exposed and extended along the channel, and a second positive electrode-side channel 125 are arranged in parallel to face the second negative electrode 115 . A meandering second negative electrode-side channel 126 exposed and extending along the channel, and the second positive electrode-side channel 125 and the second negative electrode-side channel 126 are separated from each other, and a diaphragm 116 that allows cations contained in the solution flowing through the channel to permeate. A pair of second negative and positive electrodes (the second positive electrode 114 and the second negative electrode 115) exposes the second positive electrode 114 to the second positive electrode side channel 125 by the second positive electrode side spacer 117, By exposing the second negative electrode 115 to the second negative electrode side channel 126 by the negative electrode side spacer 118, the second positive electrode side channel 125 and the second negative electrode side channel 126 are configured in a meandering manner. , the hypochlorous acid water supplied from the hypochlorous acid water generating unit 102 are configured to flow in the same direction.

According to such a configuration, the hypochlorous acid water generated by electrolyzing the salt water is circulated while applying a voltage in the same direction across the diaphragm 116, which causes residual components from the hypochlorous acid water. Cations can be separated and reduced. Therefore, the hypochlorous acid water treatment unit 103 can produce hypochlorous acid water with reduced residual components generated by the electrolysis of salt water. More specifically, the hypochlorous acid water extracted from the anode side becomes hypochlorous acid water in which cations that cause residual components are separated and diluted, and the hypochlorous acid water extracted from the cathode side is , it becomes hypochlorous acid water in which cations, which are factors of residual components, are concentrated. That is, from the anode side of the hypochlorous acid water supply device 101, the hypochlorous acid water in which the cations that cause the residual components are separated and diluted is obtained, and from the cathode side of the hypochlorous acid water supply device 101, At the same time, hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated can be obtained.

(4) The hypochlorous acid water supply device 101 includes a planar second positive electrode 114, a planar diaphragm 116 facing the second positive electrode 114, and between the second positive electrode 114 and the diaphragm 116 and a second positive electrode-side spacer 117 that exposes the second positive electrode 114 and the diaphragm 116 in the second positive electrode-side channel 125 along the channel, and the second positive electrode-side channel is It is composed of the second positive electrode 114 and the diaphragm 116 exposed along the flow path, and the second positive electrode side spacer 117 . The hypochlorous acid water supply device 101 further includes a planar second cathode 115, a planar diaphragm 116 facing the second cathode 115, and a gap between the second cathode 115 and the diaphragm 116. and a second cathode side spacer 118 for exposing the second cathode 115 and the diaphragm 116 in the second cathode side channel 126 along the channel, and the second cathode side channel 126 is composed of a second cathode 115 and a diaphragm 116 exposed along the channel, and a spacer 118 on the side of the second cathode. By doing so, hypochlorous acid generated by electrolyzing salt water is generated by the flow path shape formed in the second positive electrode side spacer 117 and the flow path shape formed in the second cathode side spacer 18. Since the ability to separate cations that cause residual components from water can be changed, the area and time for separating cations that cause residual components from hypochlorous acid water can be freely designed. .

(5) The hypochlorous acid water supply device 101 is provided in a flow path that communicates and connects the hypochlorous acid water generation unit 102 and the hypochlorous acid water treatment unit 103, and has a diaphragm electrolysis flow path (second positive electrode). Supply pumps (a positive electrode side supply pump 129 and a negative electrode side supply pump 131) that supply hypochlorous acid water from the hypochlorous acid water generation unit 102 to the electrode side channel 125 and the second negative electrode side channel 126) ). The supply pump was adapted to supply the hypochlorous acid water from the hypochlorous acid water generation unit 102 to the second positive electrode side channel 125 and the second negative electrode side channel 126 at a constant flow rate. As a result, the time during which the voltage is applied in the second positive electrode side channel 125 can be made constant, and the time during which the voltage is applied in the second negative electrode side channel 126 can be made constant. can be For this reason, the concentration at which the cations that cause residual components in the hypochlorous acid water in the second positive electrode side channel 125 are separated and diluted, and the hypochlorous acid water in the second negative electrode side channel 126 It is possible to stabilize the concentration of cations that contribute to the residual components of .

(Embodiment 2-2)
A spatial sterilization system 140 using a hypochlorous acid water supply device 101 according to Embodiment 2-2 of the present disclosure will be described with reference to FIGS. 7 and 17. FIG. FIG. 17 is a schematic diagram of a space sterilization system 140 using the hypochlorous acid water supply device 101 according to Embodiment 2-2 of the present disclosure. A space sterilization system 140 according to Embodiment 2-2 described below is a system incorporating the hypochlorous acid water supply device 101 according to Embodiment 2-1. In the description of Embodiment 2-2, the substantially same configurations as those of the hypochlorous acid water supply apparatus 101 according to Embodiment 2-1 are denoted by the same reference numerals, and the description is partially simplified. or may be omitted.

The space sterilization system 140 according to the present embodiment 2-2 sprays hypochlorous acid water generated from the hypochlorous acid water supply device 101 from the mist spray device 144 in the bathroom space and at the drain port 146. It is a system that sterilizes and cleans the bathroom space by flushing. The bathroom space corresponds to the "predetermined space" in the claims.

Specifically, as shown in FIG. 17, the space sterilization system 140 includes a hypochlorous acid water supply device 101 (hypochlorous acid water generation unit 102, hypochlorous acid water treatment unit 103, positive electrode side supply Pump 129, negative electrode side supply pump 131), positive electrode side extraction solution tank 141, negative electrode side extraction solution tank 142, positive electrode side extraction solution bathroom pipe 143, mist spray device 144, negative electrode side An extraction solution bath plumbing 145 and a drain 146 are provided.

The hypochlorous acid water generation unit 102 that constitutes the hypochlorous acid water supply device 101 is a unit that supplies salt water (aqueous sodium chloride solution) and generates hypochlorous acid water through electrolysis. As described above, the hypochlorous acid water generated by the hypochlorous acid water generation unit 102 contains NaClO and HClO, which are components of the hypochlorous acid water. Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like. More specifically, in the hypochlorous acid water generation unit 102, the positive electrode side supply pump 129 and the negative electrode side supply pump 131 operate to operate the first positive electrode solution extraction port provided on the first positive electrode 104 side. Acidic hypochlorous acid water containing a large amount of HCl and HClO is extracted from 110 as a first positive electrode extraction solution 110a. Alkaline hypochlorous acid water containing a large amount of NaOH is extracted as the first cathode extraction solution 111a from the first cathode solution extraction port 111 provided on the first cathode 105 side.

The hypochlorous acid water treatment unit 103 circulates the hypochlorous acid water supplied from the hypochlorous acid water generation unit 102, and from the second positive electrode side channel 125, the next The second positive electrode extraction solution 122a, which is chlorous acid water, is extracted, and the second negative electrode extraction solution 124a, which is hypochlorous acid water mainly composed of NaClO and NaOH with high detergency, is extracted from the second negative electrode side channel 126. This is the unit to extract. The second positive electrode extracting solution 122 a is stored in the positive electrode side extracting solution tank 141 and then sent to the mist spraying device 144 through the positive electrode side extracting solution bathroom pipe 143 . Then, the mist spray device 144 sprays the second positive electrode extraction solution 122a into the bathroom space. Further, the second cathode extraction solution 124 a is stored in the cathode side extraction solution tank 142 and then sent to the drain port 146 through the cathode side extraction solution bathroom piping 145 . The second cathode extraction solution 124a flows through the drain port 146 and flows through the drain port 146 into the drain pipe.

The positive electrode side extraction solution tank 141 sends the second positive electrode extraction solution 122a, which is hypochlorous acid water containing mainly HClO with high sterilizing power extracted from the second positive electrode side channel 125, to the mist spray device 144. It is a temporary storage tank until it is liquefied. The positive electrode side extraction solution tank 141 is connected to a mist spraying device 144 via a positive electrode side extraction solution bathroom piping 143 .

The cathode-side extraction solution tank 142 sends the second cathode-side extraction solution 124 a, which is hypochlorous acid water containing NaClO and NaOH with high detergency extracted from the second cathode-side channel 126 , to the drain port 146 . It is a temporary storage tank until it is liquefied. The cathode-side extraction solution tank 142 is connected to a drain port 146 via a cathode-side extraction solution bathroom pipe 145 .

The positive electrode side extraction solution bathroom pipe 143 is a pipe for sending liquid from the positive electrode side extraction solution tank 141 to the mist spray device 144 . The positive electrode-side extraction solution bathroom pipe 143 is installed behind the wall and ceiling of the bathroom, and is connected to a mist spraying device 144 installed on the ceiling.

The cathode-side extraction solution bathroom pipe 145 is a pipe for sending liquid from the cathode-side extraction solution tank 142 to the drain port 146 . The cathode-side extraction solution bathroom pipe 145 is installed behind the wall and floor of the bathroom and connected to a drain port 146 .

The mist spraying device 144 is a device that sprays hypochlorous acid water in the form of mist into the bathroom space. More specifically, the mist spraying device 144 finely sprays the second positive electrode extraction solution 122a, which is hypochlorous acid water, transported from the positive electrode side extraction solution tank 141 through the positive electrode side extraction solution bathroom piping 143. It is a device that emits a fine mist. The mist spraying device 144 is installed so that a spraying part protrudes from the ceiling toward the bathroom so that the mist can be sprayed from the ceiling of the bathroom to the entire bathroom. The mist spraying method includes a two-fluid spraying method that uses compressed air to atomize the mist, an ultrasonic method that uses an ultrasonic element to atomize a fine mist of 10 μm or less, or a solution that is released from a rotating body and crushed. and a crushing spray method in which a fine mist of 1 μm or less is sprayed.

The drain port 146 is a connection port for connecting with a drain pipe for discharging water or dirt generated in the bathroom space to the outside of the bathroom space. To the drain port 146, the second cathode extraction solution 124a is conveyed from the cathode side extraction solution tank 142 through the cathode side extraction solution bathroom piping 145, and the hypochlorous acid water containing NaClO and NaOH with high detergency. The drain port 146 and the drain pipe connected to the drain port 146 can be cleaned of dirt by the second cathode extraction solution 124a.

As described above, according to the spatial sterilization system 140 using the hypochlorous acid water supply device 101 according to Embodiment 2-2, the following effects can be obtained.

(6) The space sterilization system 140 is connected to the hypochlorous acid water supply device 101 and the second positive electrode side channel 125, and the hypochlorous acid water sent out from the second positive electrode side channel 125. and a mist spraying device 144 that emits hypochlorous acid water mist into a predetermined space. According to such a configuration, even if the hypochlorous acid water mist delivered from the second positive electrode-side channel 125 is discharged into the predetermined space, residual components remaining in the predetermined space are suppressed. In other words, since the hypochlorous acid water delivered from the second positive electrode side channel 125 is hypochlorous acid water in which residual components generated by the electrolysis of salt water are reduced, when sterilizing a predetermined space, It is possible to suppress the occurrence of metal corrosion due to residual components while maintaining the sterilization performance.

(7) In the space sterilization system 140, the bathroom space is provided with a drain port 146 for discharging water generated in the bathroom space, and the second cathode-side channel 126 is connected to the drain port 146 in communication. , the hypochlorous acid water sent from the second cathode side channel 126 can be introduced into the drain port 146 . By doing so, hypochlorous acid with high detergency containing an alkaline solution in which cations that cause residual components are concentrated is extracted from the hypochlorous acid water delivered from the second negative electrode side channel 126. Since water is passed through the drain port 146 (and the drain pipe connected to the drain port 146), the drain pipe can be cleaned with the alkaline solution.

As described above, the present disclosure has been described based on the second embodiment, but the present disclosure is not limited to the above-described second embodiment, and various modifications and improvements are possible without departing from the scope of the present disclosure. One thing is easy to guess.

(Embodiment 3)
Conventionally, by electrolyzing salt water, hypochlorous acid water containing NaClO as a main component and containing HClO and NaOH is produced. Hypochlorous acid water is known to improve its sterilization power by making it weakly acidic, and a technology is known to control the pH generated using a diaphragm with ion permeability to the weakly acidic side. (See Patent Document 1, for example).

Therefore, the purpose of the present disclosure is to provide a hypochlorous acid water supply device capable of supplying hypochlorous acid water with reduced residual components generated by electrolysis of salt water and a space sterilization system using the same. and

According to the present disclosure, it is possible to provide a hypochlorous acid water supply device capable of supplying hypochlorous acid water with reduced residual components generated by electrolysis of salt water, and a space sterilization system using the same. can.

The hypochlorous acid water supply apparatus according to the present disclosure includes a meandering electrolysis flow path configured to be able to supply salt water, and a pair of salt water supplied into a non-membrane electrolysis flow path constituting the front stage of the electrolysis flow path. A hypochlorous acid water generator that continuously electrolytically generates hypochlorous acid water by energizing between the positive and negative electrodes of the hypochlorous acid water generator, and a hypochlorous acid a hypochlorous acid water treatment unit for continuously treating the hypochlorous acid water supplied from the water generation unit by energizing between the pair of positive and negative electrodes. The structure is such that the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is supplied to the outside.

According to such a configuration, by supplying salt water to the electrolysis channel, the hypochlorous acid water is electrolyzed in the non-diaphragm electrolysis channel in the hypochlorous acid water generation unit to generate hypochlorous acid water. In the chloric acid water treatment unit, the hypochlorous acid water generated in the non-diaphragm electrolysis flow path is circulated in the diaphragm electrolysis flow path to separate and reduce the cations that cause residual components from the positive electrode side. It can be extracted as acid water. For this reason, it is possible to provide a one-pass type hypochlorous acid water supply device capable of externally supplying hypochlorous acid water from which residual components generated by electrolysis of salt water are separated. In addition, a common positive electrode and negative electrode (a pair of negative and positive electrodes) are used in the hypochlorous acid water generation part and the hypochlorous acid treatment part, and the non-diaphragm electrolytic flow path and the diaphragm electrolytic flow path are between the negative and positive electrodes. Directly connected with voltage applied. As a result, in the non-diaphragm electrolysis flow path, the anions flow into the electrolysis flow path with the diaphragm in such a state that there are many anions in the vicinity of the positive electrode and many cations exist in the vicinity of the negative electrode. On the positive electrode side, the electrodialysis treatment can be started in a state in which cations that cause residual components have been reduced in advance.

In addition, in the hypochlorous acid water supply device according to the present disclosure, the non-diaphragm electrolytic flow path includes a planar positive electrode, a planar negative electrode facing the positive electrode, and between the positive electrode and the negative electrode. and a spacer member provided. A pair of first negative and positive electrodes are formed in a meandering shape by exposing the positive electrode and the negative electrode to the non-diaphragm electrolytic flow path by the spacer member. By doing so, the ability to electrolyze salt water can be changed according to the channel shape formed in the spacer member, so that the area and time for electrolyzing salt water can be freely designed.

In addition, in the hypochlorous acid water supply device according to the present disclosure, the diaphragm-equipped electrolysis flow path includes a meandering first flow path in which the positive electrode is exposed and extends along the flow path, and the first flow path faces the first flow path. and a meandering second channel in which the negative electrode is exposed and extended along the channel; and a diaphragm permeable to cations contained in the solution. The pair of negative and positive electrodes are configured in a meandering manner by exposing the positive electrode to the first channel by the first spacer member and exposing the negative electrode to the second channel by the second spacer member. By doing so, the hypochlorous acid water generated by electrolyzing the salt water is circulated while applying a voltage in the same direction across the diaphragm, which causes residual components from the hypochlorous acid water. Cations can be separated and reduced. Therefore, the hypochlorous acid water treatment unit can produce hypochlorous acid water in which residual components generated by the electrolysis of salt water are reduced.

Further, in the hypochlorous acid water supply device according to the present disclosure, the diaphragm-containing electrolytic flow path is provided between the planar positive electrode, the planar diaphragm facing the positive electrode, and the positive electrode and the diaphragm. and a first spacer member exposing the positive electrode and the diaphragm within the first channel along the channel. The first channel is composed of the positive electrode and the diaphragm exposed along the channel, and the first spacer member. A planar cathode, a planar diaphragm facing the cathode, and a second electrode provided between the cathode and the diaphragm exposing the cathode and the diaphragm into the second flow path along the flow path. and two spacer members. The second channel is composed of a negative electrode and a diaphragm exposed along the channel, and a second spacer member. By doing so, residual components can be removed from the hypochlorous acid water generated by electrolyzing salt water by the channel shape formed in the first spacer member and the channel shape formed in the second spacer member. Since the ability to separate cations that cause residual components can be changed, the area and time for separating cations that cause residual components from hypochlorous acid water can be freely designed.

Further, in the hypochlorous acid water supply device according to the present disclosure, the spacer member is configured by overlapping the first spacer member and the second spacer member. According to such a configuration, the structure can be simplified, and the liquid can be circulated while suppressing the leakage of the liquid due to the boundary between the non-diaphragm electrolysis flow path and the diaphragm electrolysis flow path and the disturbance of the ion distribution in the flow path. can.

In addition, the hypochlorous acid water supply device according to the present disclosure is provided at each outlet on the positive electrode side and the negative electrode side of the hypochlorous acid water treatment unit, and generates a flow that supplies salt water to the electrolytic flow path. Equipped with a feed pump. It is preferable that the supply pump supplies the hypochlorous acid water from the hypochlorous acid water generator to the first channel and the second channel at a constant flow rate. As a result, the time during which the voltage is applied in the first channel can be made constant, and the time during which the voltage is applied in the second channel can be made constant. For this reason, the concentration at which the cations that cause residual components in the hypochlorous acid water in the first flow channel are separated and diluted, and the cations that cause residual components in the hypochlorous acid water in the second flow channel concentration can be stabilized.

In addition, in the space sterilization system according to the present disclosure, a predetermined space is provided with a drain pipe for discharging water generated within the predetermined space. The second channel is connected to the drain pipe, and has a structure configured so that the hypochlorous acid water sent out from the second channel can be introduced into the drain pipe. By doing so, hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated is removed from the hypochlorous acid water sent from the second flow path. Since the alkaline solution is circulated, the drain pipe can be washed with the alkaline solution.

Embodiment 3 includes at least Embodiment 3-1, Embodiment 3-2 and Embodiment 3-3 below.

(Embodiment 3-1)
A hypochlorous acid water supply device 201 according to Embodiment 3-1 of the present disclosure will be described with reference to FIGS. 18 to 20. FIG. FIG. 18 is a schematic diagram of a hypochlorous acid water supply device 201 according to Embodiment 3-1 of the present disclosure. 19 is an exploded perspective view of the hypochlorous acid water supply device 201. FIG. FIG. 20 is a vertical cross-sectional image diagram of the hypochlorous acid water supply device 201 .

The hypochlorous acid water supply device 201 supplies salt water (aqueous sodium chloride solution), generates hypochlorous acid water by electrolysis, and further contains residual components (Na ⁺ ions, etc.) contained in the generated hypochlorous acid water. A component having a cation of (for example, NaClO, NaOH) can be separated and reduced from the hypochlorous acid water flowing inside and can be taken out and supplied in a single pass.

Specifically, as shown in FIG. 18, the hypochlorous acid water supply device 201 includes a hypochlorous acid water generation unit 201a that electrolyzes salt water to generate hypochlorous acid water in one pass, The hypochlorous acid water treatment unit 201b that separates and reduces the residual components contained in the chlorous acid water in a single pass, and electrolysis and The electrolysis/electrodialysis power supply 215 that applies a current and voltage for electrodialysis, and the flow path of the hypochlorous acid water generation unit 201a. A positive electrode side supply pump 231 (see FIG. 26) and a negative electrode side supply pump 232 (see FIG. 26) for circulating hypochlorous acid water are provided.

As shown in FIGS. 18 to 20, the hypochlorous acid water generator 201a includes a positive electrode 202, a negative electrode 203, a positive electrode side spacer 205, a negative electrode side spacer 206, and a positive electrode packing 207a. , the negative electrode packing 207b, the positive electrode side tank housing side surface 208a, the negative electrode side tank housing side surface 208b, the negative electrode solution supply port 209, the positive electrode solution extraction port 210, and the negative electrode solution extraction port 211. and a channel 212 between positive and negative electrodes.

The hypochlorous acid water treatment unit 201b includes a positive electrode 202, a negative electrode 203, a diaphragm 204, a positive electrode-side spacer 205, a negative electrode-side spacer 206, a positive electrode packing 207a, and a negative electrode packing 207b. , the positive electrode side tank housing side surface 208a, the negative electrode side tank housing side surface 208b, the positive electrode solution supply port 209, the positive electrode solution extraction port 210, the negative electrode solution extraction port 211, and the positive electrode side flow A channel 213 and a cathode side channel 214 are provided.

The positive electrode 202 is a planar electrode plate. The surface of the electrode plate of the positive electrode 202 is exposed along the channel 212 between the negative and positive electrodes and the channel 213 on the positive electrode side by the positive electrode side spacer 205 . The positive electrode 202 is an electrode that functions as an anode when current is passed by the electrolysis/electrodialysis power source 215 . The positive electrode 202 is arranged substantially parallel to and facing the negative electrode 203 . The positive electrode 202 has a platinum-containing catalyst formed on the surface of a titanium base material, and uses a material that is highly efficient in generating hypochlorous acid by electrolysis. The platinum-containing catalyst is formed at least on the surface of the positive electrode 202 exposed along the channel 212 between the negative and positive electrodes and the channel 213 on the positive electrode side. After the electrolysis of salt water, the main purpose is to move cations by electrodialysis to generate hypochlorous acid water that suppresses NaClO and NaOH, which are the residual components, but it is made by decomposing from NaClO. NaCl remaining after the electrolysis of NaCl and salt water has not been completely electrolyzed can be converted to hypochlorous acid by means of platinum electrodes.

The cathode 203 is a planar electrode plate. The surface of the electrode plate of the negative electrode 203 is exposed along the channel 212 between the positive and negative electrodes and the channel 214 on the negative electrode side by the negative electrode side spacer 206 . The negative electrode 203 is an electrode that functions as a cathode when current is passed by the electrolysis/electrodialysis power source 215 . The negative electrode 203 is arranged substantially parallel to and facing the positive electrode 202 . The negative electrode 203 forms a platinum-containing catalyst on its surface similarly to the positive electrode 202 . The platinum-containing catalyst is formed at least on the surface of the negative electrode 203 exposed along the channels of the negative electrode side channel 214 and the positive electrode side channel 213 . In addition, the positive electrode 202 and the negative electrode 203 in the regions exposed along the positive electrode side flow path 213 and the negative electrode side flow path 214 and subjected to electrodialysis have the same shape, and the shorter the opposing distance, the more the ions move. Cheap. If the facing distance is short, the flow rate in the flow path will decrease, and the amount of hypochlorous acid water that can be generated will also decrease. is desirable.

The positive electrode 202 and the negative electrode 203 form a negative electrode as a pair of opposing electrodes.

The diaphragm 204 is a planar thin film. The diaphragm 204 is arranged substantially parallel to and facing the positive electrode 202 and the negative electrode 203 . The diaphragm 204 is provided so as to separate the positive electrode side channel 213 and the negative electrode side channel 214 . The diaphragm 204 is an ion exchange membrane (cation exchange membrane) capable of transferring cations such as Na ⁺ ions related to NaClO and NaOH, which are residual components of hypochlorous acid water. The diaphragm 204 can move cations to the negative electrode 203 by applying a voltage to the positive electrode 202 and the negative electrode 203 . Examples of the cation exchange membrane include Nafion manufactured by DuPont. The diaphragm 204 is arranged in the rear stage (the latter part) of the channel, and the part having the diaphragm 204 becomes the hypochlorous acid water treatment part 201b. On the contrary, the part without the diaphragm 204 in the front stage (first half part) of the flow path becomes the hypochlorous acid water generating part 201a. The size of the diaphragm 204 determines the area of the hypochlorous acid water generating section 201a and the area of the hypochlorous acid water processing section 201b. Specifically, if you want to increase the ratio of electrolysis time of salt water, the size of diaphragm 204 is reduced, and if you want to increase the ratio of electrodialysis time of hypochlorous acid water, the size of diaphragm 204 is increased. Enlarge. Since the negative electrode 203 concentrates cations, there is a possibility that scale components contained in tap water or the like may be deposited during long-term use. In order to reduce scale accumulation, for example, each time water is passed through the hypochlorous acid water supply device 201, the potentials of the positive electrode 202 and the negative electrode 203 are reversed to dissolve adhered scale. When it is assumed that the electrodes will be used with the polarity reversed, it is desirable that the positive electrode 202 and the negative electrode 203 be similarly treated with a catalyst containing platinum.

The positive electrode side spacer 205 is an insulating member. The positive electrode side spacer 205 controls the distance between the positive electrode 202 and the diaphragm 204 to a predetermined distance. The positive electrode-side spacer 205 has, inside the positive electrode-side spacer 205, a positive electrode-side channel hole 213a that forms a positive electrode-side channel 213, which will be described later. The positive electrode side channel hole 213 a is a hole that forms the positive electrode side channel 213 formed in the positive electrode side spacer 205 . The positive electrode-side channel hole 213a is formed through the front and back of the positive electrode-side spacer 205, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. A meandering packing member (not shown), which is the same as the positive electrode spacer 205, is attached to the surface of the positive electrode spacer 205 in order to increase the adhesion between the positive electrode 202 and the diaphragm 204. FIG. The positive electrode side spacer 205 corresponds to the "first spacer member" in the claims.

The cathode-side spacer 206 is an insulating member. The cathode-side spacer 206 controls the distance between the cathode 203 and the diaphragm 204 to a predetermined distance. The cathode-side spacer 206 has, inside the cathode-side spacer 206, a cathode-side channel hole 214a that forms a cathode-side channel 214, which will be described later. The cathode-side channel hole 214 a is a hole that forms the cathode-side channel 214 formed in the cathode-side spacer 206 . The cathode-side channel hole 214a is formed through the front and back surfaces of the cathode-side spacer 206, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. Here, the negative electrode side channel hole 214a and the positive electrode side channel hole 213a are arranged so as to face each other. A meandering packing member (not shown), which is the same as that of the cathode-side spacer 206 , is attached to the surface of the cathode-side spacer 206 in order to increase the adhesion between the cathode 203 and the diaphragm 204 . The cathode-side spacer 206 corresponds to the "second spacer member" in the claims.

In the hypochlorous acid water generating part 201a, the positive electrode side spacer 205 and the negative electrode side spacer 206 are in direct contact with each other, and function as a positive electrode spacer between the positive electrode 202 and the negative electrode 203. The spacer between the positive and negative electrodes corresponds to the "spacer member" in the claims.

In the hypochlorous acid water generating part 201a, the positive electrode side spacer 205 and the negative electrode side spacer 206 are interposed between the positive electrode 202 and the negative electrode 203. In the hypochlorous acid water treatment part 201b, a positive electrode side spacer 205, a diaphragm 204, and a negative electrode side spacer 206 are interposed between the positive electrode 202 and the negative electrode 203. As shown in FIG. The positive electrode 202 and the negative electrode 203 are arranged substantially parallel, and in order to absorb the thickness of the diaphragm 204, the thickness of the positive electrode side spacer 205 and the negative electrode side spacer 206 of the hypochlorous acid water treatment portion 201b is , is thinned by the thickness of the diaphragm 204 . As a means for absorbing the thickness of the diaphragm 204 with the thickness of the positive electrode side spacer 205 and the negative electrode side spacer 206, the packing members arranged on the surfaces of the positive electrode side spacer 205 and the negative electrode side spacer 206 are made thicker than the thickness of the diaphragm 204. , and the packing member is made of a material such as silicone resin that is deformed and absorbs the shape. It is possible to prevent liquid leakage, which is the original purpose of the packing member, while absorbing it with the member.

The positive electrode packing 207a has a shape in which the outer circumference of the positive electrode 202 is hollowed out to the size of the electrode. It is mounted with clamping pressure so that the electrode supply solution 209a) does not leak. As a member of the positive electrode packing 207a, insulating silicone rubber can be used. The positive electrode packing 207a is thicker than the positive electrode 202, and is crushed by being pressed by the tightening pressure to bring the positive electrode side spacer 205 into close contact with the positive electrode side tank housing side face 208a. A thickness of 202 is desirable.

The negative electrode packing 207b has a shape in which the electrode size is hollowed out around the outer periphery of the negative electrode 203. The negative electrode packing 207b is in close contact with the negative electrode side spacer 206, and flows in the outer peripheral direction. It is mounted with clamping pressure so that the electrode supply solution 209a) does not leak. Insulating silicon rubber can be used as the member of the cathode packing 207b. The negative electrode packing 207b is thicker than the negative electrode 203, and is crushed by being pressed by the tightening pressure. It is desirable that the thickness of the

The side surface 208a of the positive electrode tank housing is arranged so as to be in direct contact with the outside of the positive electrode 202. In order to suppress penetration of the solution to the outside of the positive electrode 202, the positive electrode side tank housing side surface 208a is provided with a packing (not shown) for increasing adhesion on the inner surface of the positive electrode side tank housing side surface 208a. ) is attached, and it is desirable to apply clamping pressure to suppress the solution from flowing into the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the positive electrode 202, the efficiency of electrodialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The side surface 208b of the cathode-side tank housing is arranged so as to be in direct contact with the outside of the cathode 203. In order to suppress the penetration of the solution to the outside of the cathode 203, the cathode side tank housing side surface 208b is provided with a packing (not shown) for increasing adhesion on the inner surface of the cathode side tank housing side surface 208b. ) is attached, and it is desirable to apply clamping pressure to suppress the solution from flowing into the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the negative electrode 203, the efficiency of electrode dialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The positive and negative electrode solution supply port 209 is a connection port for flowing salt water to be electrolyzed into the channel 212 between negative and positive electrodes, and is equipped with a connector (not shown) to which a tube can be connected. In order to supply salt water from the outside of the positive electrode 202 , the negative electrode solution supply port 209 is processed at a position outside the positive electrode 202 . The positive and negative electrode solution supply ports 209 are processed at positions outside both the positive electrode 202 and the negative electrode 203, respectively. good.

The positive and negative electrode supply solution 209a is salt water. The negative and positive electrode supply solution 209 a is introduced from the negative and positive electrode solution supply port 209 into the channel 212 between the negative and positive electrodes.

The positive electrode solution extraction port 210 is a connection port for extracting the electrodialyzed positive electrode extraction solution 210a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the positive electrode extracting solution 210 a outside the positive electrode 202 , the positive electrode solution extracting port 210 is processed at a position outside the positive electrode 202 .

The positive electrode extraction solution 210a is hypochlorous acid water containing HClO as the main component. The positive electrode extraction solution 210 a is introduced into the positive electrode solution extraction port 210 from the positive electrode side channel 213 .

More specifically, the positive electrode extraction solution 210a electrolyzes the negative electrode supply solution 209a in the channel 212 between the negative and positive electrodes, and then flows through the positive electrode side channel 213 to remove cations that cause residual components. is a diluted solution. Since the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 201a is used, the positive electrode extraction solution 210a contains Na ⁺ ions, which are cations, separated and diluted. The component of HClO becomes hypochlorous acid water as the main component. pH indicates acidity.

The negative electrode solution extraction port 211 is a connection port for extracting the electrodialyzed negative electrode extraction solution 211a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the negative electrode extracting solution 211 a outside the negative electrode 203 , the negative electrode solution extracting port 211 is processed at a position outside the negative electrode 203 .

The negative electrode extraction solution 211a is hypochlorous acid water containing NaClO and NaOH as main components. The negative electrode extraction solution 211 a is led out to the negative electrode solution extraction port 211 from the negative electrode side channel 214 .

More specifically, the negative electrode extracting solution 211a electrolyzes the negative electrode supply solution 209a in the channel 212 between the negative and positive electrodes, and then flows through the channel 214 on the negative electrode side to remove cations that cause residual components. is a concentrated solution. Since the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 201a is used, the negative electrode extraction solution 211a has Na ⁺ ions, which are cations, separated and concentrated, By being generated as NaOH, it becomes hypochlorous acid water containing NaOH and NaClO as main components. pH indicates alkaline.

Here, the positive and negative electrode solution supply ports 209 are preferably arranged on the lower side in the vertical direction, and the positive electrode solution extraction port 210 and the negative electrode solution extraction port 211 are preferably arranged on the upper side in the vertical direction. desirable. When oxygen gas, hydrogen gas, and the like are generated by the electrodialysis reaction and the electrolysis reaction in the flow path, the gas can be more efficiently discharged together with the solution if the extraction port is arranged above.

The channel 212 between negative and positive electrodes is a channel formed in a region surrounded by the positive electrode 202, the positive electrode side spacer 205, the negative electrode side spacer 206, and the negative electrode 203, and is a so-called non-diaphragm electrolytic channel. . The channel 212 between the negative and negative electrodes is formed in a meandering manner by a structure in which the positive electrode side channel hole 213a of the positive electrode side spacer 205 and the negative electrode side channel hole 214a of the negative electrode side spacer 206 are overlapped. More specifically, the channel 212 between positive and negative electrodes reciprocates in the horizontal direction, and the number of reciprocations in the horizontal direction increases the distance for electrolysis until the solution reaches from the bottom to the top. Furthermore, by reducing the channel width of the channel 212 between the negative and positive electrodes, the distance becomes longer, and the electrolysis time can be lengthened. In order to reduce backflow of the liquid in the channel 212 between the negative and positive electrodes, it is desirable that the channel 212 between the positive and negative electrodes has a structure that goes upward in one direction, except that the channel 212 reciprocates in the horizontal direction. The channel 212 between the negative and positive electrodes is connected to the channel 213 on the positive electrode side and the channel 214 on the negative electrode side, and the negative electrode supply solution 209a flows therein. The amount of electrolysis is controlled by the applied voltage current and flow velocity in the channel. The flow rate can be controlled by installing a positive electrode side supply pump 231 after the positive electrode solution extraction port 210 and installing a negative electrode side supply pump 232 after the negative electrode solution extraction port 211 . Each supply pump is desirably of a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By allowing the solution to flow at a constant flow rate, it is possible to control the electrolysis time in the flow channel at a constant level, so that the concentration of the hypochlorous acid water to be extracted can be stably controlled.

In the channel 212 between the negative and positive electrodes, although the electrolyzed hypochlorous acid water is mixed during the flow process, many Cl ⁻ ions, which are the negative ion component of the salt water, are distributed near the positive electrode 202, and the negative electrode In the vicinity of 203, there is a concentration gradient in which many Na ⁺ ions, which are cationic components of salt water, are distributed. Therefore, when electrolysis is performed between the positive and negative electrodes, an acidic solution flows in the vicinity of the positive electrode 202 and an alkaline solution flows in the vicinity of the negative electrode 203 . Therefore, the hypochlorous acid water, which is more acidic and alkaline, flows through the positive electrode-side channel 213 and the negative electrode-side channel 214, respectively. Specifically, acidic hypochlorous acid water containing a large amount of HCl and HClO is circulated in the positive electrode side channel 213, and alkaline hypochlorous acid water containing a large amount of NaOH is circulated in the negative electrode side channel 214. extracted.

The positive electrode-side channel 213 is a channel formed by a region surrounded by the positive electrode 202 , the positive electrode-side spacer 205 and the diaphragm 204 . The positive electrode-side channel 213 is formed by meandering positive electrode-side channel holes 213 a of the positive electrode-side spacer 205 . More specifically, the anode-side channel 213 reciprocates in the horizontal direction, and the number of horizontal reciprocations until the anode-side solution reaches from the bottom to the top increases the distance for electrodialysis. Furthermore, by reducing the channel width of the positive electrode side channel 213, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the positive electrode side channel 213, it is desirable that the positive electrode side channel 213 has a structure in which the positive electrode side channel 213 goes from bottom to top in one direction other than reciprocating in the horizontal direction. One of the positive electrode side channels 213 is connected to the channel 212 between the negative and positive electrodes, and the other is provided with a positive electrode solution extraction port 210, and the hypochlorous acid water generating unit 201a internally converts salt water into electricity. Hypochlorous acid water generated by decomposition is distributed. The positive electrode-side channel 213 corresponds to the "first channel" in the claims.

The cathode-side channel 214 is a channel formed by a region surrounded by the cathode 203 , the cathode-side spacer 206 and the diaphragm 204 . The cathode-side channel 214 is formed by meandering cathode-side channel holes 214 a of the cathode-side spacer 206 . More specifically, the cathode-side channel 214 reciprocates in the horizontal direction until the cathode-side solution reaches from the bottom to the top, and the number of horizontal reciprocations increases the distance for electrodialysis. Further, by reducing the channel width of the negative electrode side channel 214, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the negative electrode side channel 214, it is desirable that the negative electrode side channel 214 has a structure in which the liquid flows in one direction from bottom to top, except for reciprocating in the horizontal direction. One of the negative electrode side channels 214 is connected to the channel 212 between the negative and positive electrodes, and the other is provided with the negative electrode solution extraction port 211, and the salt water is electrically generated in the hypochlorous acid water generation part 201a inside. Hypochlorous acid water generated by decomposition is distributed. The cathode-side channel 214 corresponds to the "second channel" in the claims.

The positive electrode side channel 213 and the negative electrode side channel 214 face each other in a symmetrical shape with the diaphragm 204 interposed therebetween. That is, the positive electrode side channel 213 and the negative electrode side channel 214 are formed in meandering shapes facing each other with the diaphragm 204 interposed therebetween. In this way, the positive electrode side channel 213 and the negative electrode side channel 214 constitute a so-called membrane electrolysis channel. Then, the Na + ions contained in the hypochlorous acid water flowing through the positive electrode side channel 213 move to the negative electrode side channel 214 side. The amount of ion movement is controlled by the applied voltage and current and the flow velocity in the channel. The flow rate can be controlled by installing a positive electrode side supply pump 231 after the positive electrode solution extraction port 210 and installing a negative electrode side supply pump 232 after the negative electrode solution extraction port 211 . Each pump is desirably of a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By flowing the solution at a constant flow rate, it is possible to control the electrodialysis and electrolysis time in the flow channel constantly, so that the concentration of the hypochlorous acid water to be extracted can be stably controlled.

In the hypochlorous acid water supply apparatus 201, a positive electrode side channel 213 and a negative electrode side channel 214 which constitute a diaphragmless electrolysis channel 212 which constitutes a non-diaphragm electrolysis channel, followed by a positive electrode side channel 213 and a negative electrode side channel 214 which constitute a diaphragm electrolysis channel. As a result, the meandering electrolysis flow path as the hypochlorous acid water supply device 201 is configured as a one-pass type. In other words, in the meandering electrolytic flow path, the anode-positive electrode flow path 212 constitutes the front stage of the electrolytic flow path, and the positive electrode side flow path 213 and the negative electrode side flow path 214 constitute the rear stage of the electrolytic flow path. .

The electrolysis/electrodialysis power supply 215 is a DC power supply that is connected to the positive electrode 202 and the negative electrode 203 and can apply current and voltage to the positive electrode 202 and the negative electrode 203 . The electrolysis/electrodialysis power supply 215 may be used as a constant-current controlled power supply to maintain a constant current, or may be used as a constant-voltage controlled power supply to generate a constant voltage. The electrolysis/electrodialysis power supply 215 applies current and voltage to the common positive electrode 202 and negative electrode 203 in the hypochlorous acid water generating unit 201a and the hypochlorous acid processing unit 1b. That is, the electrolysis/electrodialysis power supply 215 functions as a power supply for the electrodes that cause electrolysis in the hypochlorous acid water generating unit 201a, and as a power supply for the electrodes that cause electrodialysis in the hypochlorous acid treatment unit 1b. Function. In order to reduce scale accumulation, the electrolysis/electrodialysis power supply 215 changes the potential of the positive electrode 202 and the negative electrode 203 each time the hypochlorous acid water is supplied to the hypochlorous acid water supply device 201, for example. may be controlled so as to reverse polarity by replacing and dissolving adhered scale.

As described above, the hypochlorous acid water supply device 201 is composed of each member.

As shown in FIG. 20, the hypochlorous acid water supply device 201 is composed of the above-described hypochlorous acid water generation unit 201a and hypochlorous acid water treatment unit 201b. Then, the hypochlorous acid water supply device 201 continuously introduces salt water into the hypochlorous acid water generation unit 201a, and the hypochlorous acid water is treated with the hypochlorous acid water from the hypochlorous acid water treatment unit 201b. It is continuously supplied to the section 201b. More specifically, the hypochlorous acid water supply device 201 electrolyzes the salt water that is continuously introduced into the hypochlorous acid water generating unit 201a, and the positive electrode on the positive electrode side of the hypochlorous acid water processing unit 201b. The positive electrode extraction solution 210a delivered from the electrode-side channel 213 is supplied to the outside as acidic hypochlorous acid water. In addition, the hypochlorous acid water supply device 201 externally extracts the cathode extraction solution 211a sent from the cathode side channel 214 on the cathode side of the hypochlorous acid water treatment unit 201b as alkaline hypochlorous acid water. supply to

Next, with reference to FIGS. 20 and 21, the processing operation of the hypochlorous acid water generating unit 201a will be described. FIG. 21 is a horizontal sectional image diagram of the hypochlorous acid water generating unit 201a of the hypochlorous acid water supply device 201. As shown in FIG.

As shown in FIGS. 20 and 21, in the hypochlorous acid water generator 201a, a positive and negative electrode supply solution 209a, which is salt water, is continuously supplied to the channel 212 between positive and negative electrodes through a positive and negative electrode solution supply port 209. be. The negative and positive electrode supply solution 209a supplied from the negative and positive electrode solution supply port 209 flows through the channel 212 between the positive and negative electrodes which is formed meandering. At this time, the negative electrode supply solution 209a flows through the channel 212 between negative and positive electrodes, and at the same time, a voltage is applied to the positive electrode 202 and the negative electrode 203 at both ends. When a voltage is applied, anions (Cl ⁻ ions) are attracted to the positive electrode 202 side, and positive ions (Na ⁺ ions) are attracted to the negative electrode 203 side, and HCl and HClO are attracted to the positive electrode 202 side by electrolysis. , NaOH is generated on the cathode 203 side. Further, HClO and NaOH react to generate NaClO. By repeating this, hypochlorous acid water containing NaClO as the main component and containing HClO, NaOH, and residual NaCl is produced.

In the processing operation in the hypochlorous acid water generating unit 201a, the amount of electrolysis of NaCl is increased by increasing the electrolysis time in the channel 212 between the negative and positive electrodes, and the generated hypochlorous acid water NaCl (brine) remaining in the can be reduced. In order to lengthen the electrolysis time, it is necessary to lengthen the distance of the channel 212 between the negative and positive electrodes. The number of times of reciprocation in the horizontal direction increases the distance for electrolysis until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional area of the channel 212 between the negative and positive electrodes, the distance can be lengthened, and the electrolysis time can be lengthened.

Next, the processing operation in the hypochlorous acid water processing unit 201b will be described with reference to FIGS. 20 and 22. FIG. FIG. 22 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment unit 201b of the hypochlorous acid water supply device 201. As shown in FIG.

As shown in FIGS. 20 and 22, in the hypochlorous acid water treatment unit 201b, the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 201a is supplied to the positive electrode side channel 213. The hypochlorous acid water is continuously supplied, and the hypochlorous acid water generated by electrolyzing the salt water in the hypochlorous acid water generation unit 201 a is continuously supplied to the negative electrode side channel 214 . Then, the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 201a flows through the meandering positive electrode side flow path 213, and is also formed meanderingly. It flows through the negative electrode side channel 214 . At this time, the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 201a is circulated in the same direction through the positive electrode side channel 213 and the negative electrode side channel 214, respectively. At the same time, a voltage is applied to the positive electrode 202 and the negative electrode 203 at both ends. When a voltage is applied, negative ions are attracted to the positive electrode 202 side and positive ions (Na ⁺ ions) are attracted to the negative electrode 203 side. Since the diaphragm 204 is composed of a membrane that is permeable only to cations, the cations (Na ⁺ ions) contained in the hypochlorous acid water flowing through the positive electrode-side channel 213 do not permeate the diaphragm 204. As a result, it passes through the hypochlorous acid water in the cathode-side channel 214 and is attracted to the cathode 203 side. On the contrary, since the anions flowing through the negative electrode side channel 214 cannot permeate the diaphragm 204, only the anions contained in the positive electrode side channel 213 are attracted to the positive electrode 202. By repeating this, the cations (Na ⁺ ions) contained in the hypochlorous acid water flowing through the positive electrode-side channel 213 move to the hypochlorous acid water flowing through the negative electrode-side channel 214. As electrodialysis progresses, the hypochlorous acid water flowing through the positive electrode-side channel 213 is separated and diluted with cations (Na ⁺ ions), and the hypochlorous acid water flowing through the negative electrode-side channel 214 is , cations (Na ⁺ ions) are concentrated and extracted. As a result, from the positive electrode solution extraction port 210, as the positive electrode extraction solution 210a, the residual components NaClO and NaOH are separated and diluted, and hypochlorous acid water containing the HClO component as the main component is extracted. Conversely, from the cathode solution extraction port 211, a solution (hypochlorous acid water) containing a component in which Na ⁺ ions constituting residual components are concentrated and generated as NaOH is extracted as a cathode extraction solution 211a. be.

In the processing operation in the hypochlorous acid water treatment unit 201b, the electrodialysis time in the positive electrode side channel 213 and the negative electrode side channel ²¹⁴ is lengthened, so that the movement amount can be increased to further reduce residual components of NaClO and NaOH in the positive electrode extraction solution 210a. In order to lengthen the electrodialysis time, it is necessary to lengthen the distance between the positive electrode side channel 213 and the negative electrode side channel 214. For this purpose, the electrode moves up one step at a time while reciprocating in the horizontal direction. The solution is reciprocated in the horizontal direction, and the distance for electrodialysis is earned by the number of reciprocations in the horizontal direction until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional areas of the positive electrode side channel 213 and the negative electrode side channel 214, the distance becomes longer, and the electrodialysis time can be lengthened.

Although the pumps are controlled so that the flow rates of the solutions passing through the positive electrode side channel 213 and the negative electrode side channel 214 are the same, they may be different from each other. Different flow rates affect the concentration of each solution extracted. For example, when the flow velocity of the positive electrode side channel 213 is relatively increased and the flow velocity of the negative electrode side channel 214 is relatively decreased, the flow rate of the positive electrode side channel 213 and the negative electrode side channel 214 Compared to when the flow rate is the same, the negative electrode extraction solution 211a extracted from the negative electrode side flow channel 214 is a small amount and has a high concentration. Therefore, it is desirable to reduce the flow velocity of the cathode-side channel 214 when draining the cathode extraction solution 211a.

Next, referring to FIGS. 23A to 23C, the hypochlorous acid water supply device 201 (the hypochlorous acid water generating unit 201a and the hypochlorous acid water processing unit 201b) is actually circulated to extract the positive electrode solution. The characteristics (conductivity, pH, and effective chlorine concentration) of the hypochlorous acid water of the positive electrode extraction solution 210a and the negative electrode extraction solution 211a extracted from the port 210 and the negative electrode solution extraction port 211, respectively, will be described. 23A to 23C are diagrams showing the relationship between the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply device 201 and the electrodialysis time. More specifically, FIG. 23A is a diagram showing the relationship between electrodialysis time and electrical conductivity by the hypochlorous acid water supply device 201. FIG. FIG. 23B is a diagram showing the relationship between electrodialysis time and pH by the hypochlorous acid water supply device 201. FIG. FIG. 23C is a diagram showing the relationship between the electrodialysis time and available chlorine concentration by the hypochlorous acid water supply device 201. FIG.

In the experimental evaluation in FIGS. 23A to 23C, the hypochlorous acid water generating unit 201a was formed with a channel 212 between the negative and positive electrodes having a channel cross-sectional area of 24 mm ² and a channel length of 360 mm. A chloric acid water treatment unit 201b in which a positive electrode side channel 213 and a negative electrode side channel 214 having a channel cross-sectional area of 24 mm ² and a channel length of 320 mm were formed was used. The flow rate conditions of the positive electrode side supply pump 231 and the negative electrode side demand pump 32 are both 103 mL/h, 153 mL/h, and 250 mL/h. The electrolysis time and the electrodialysis time of the hypochlorous acid water treatment unit 201b were adjusted, and the electrical conductivity, pH, and effective chlorine concentration of the positive electrode extraction solution 210a and the negative electrode extraction solution 211a were measured.

The salt water of the negative and positive electrode supply solution 209a supplied to the negative and positive electrode solution supply port 209 has a conductivity of 429 μS/cm, a pH of 6.6, an effective chlorine concentration of 0 ppm, and a chloride ion concentration of 156 ppm. used. Electrolysis and electrodialysis were performed using a power source capable of applying a constant current of 0.2 A as the electrolysis/electrodialysis power source 215 . Here, the electrolysis time refers to the time during which the solution is in direct contact with the positive electrode 202 and the negative electrode 203 in the channel 212 between the positive and negative electrodes, and the longer the electrolysis time, the slower the flow rate. . In addition, the electrodialysis time refers to the time during which the solution is in direct contact with the positive electrode 202 and the negative electrode 203 in the positive electrode side channel 213 and the negative electrode side channel 214. The longer the electrodialysis time, the more The current will be slow. This time, electrodialysis is performed by setting the flow rate on the anode side and the cathode side to be the same.

Looking at the change in conductivity shown in FIG. 23A, the longer the electrodialysis time, in other words, the slower the flow rate, the greater the conductivity of the positive electrode extraction solution 210a extracted from the positive electrode solution extraction port 210 (the conductivity on the anode side). decreases, and the conductivity (conductivity on the cathode side) of the cathode extraction solution 211a extracted from the cathode solution extraction port 211 increases. This is because when the hypochlorous acid water generated in the hypochlorous acid water generation unit 201a is circulated through the positive electrode-side channel 213 of the hypochlorous acid water treatment unit 201b, cations contained in the anode-side solution It is thought that the Na ⁺ ions, which are , move through the diaphragm 204 to the cathode side, and the anode side changes from NaClO to HClO, resulting in a decrease in electrical conductivity. NaClO ionizes into Na ⁺ ions and ClO 2 ⁻ ions, but since HClO mainly exists as a molecule, the electrical conductivity decreases when NaClO changes to HClO.

Looking at the change in pH shown in FIG. 23B, the pH of the positive electrode extraction solution 210a (pH on the anode side) changes to the slightly acidic side, and the pH of the negative electrode extraction solution 211a (pH on the cathode side) changes to the alkaline side. are doing. This suggests the effect of conversion to HClO on the anode side. The reason why the pH on the anode side becomes closer to neutral as the electrodialysis time increases is thought to be that the slight amount of chloride ions remaining in the solution are converted to hypochlorous acid by electrolysis. On the other hand, on the cathode side, NaOH is formed by movement of Na ⁺ ions, and the cathode side becomes alkaline.

Looking at the transition of the effective chlorine concentration shown in FIG. 23C, the effective chlorine concentration of the positive electrode extraction solution 210a (the effective chlorine concentration on the anode side) increases with the electrodialysis time. Similarly, for the cathode extraction solution 211a, the available chlorine concentration (available chlorine concentration on the cathode side) increases with the electrodialysis time. This is because when the flow velocities of the positive electrode side supply pump 231 and the negative electrode side supply pump 232 are slowed down, the electrolysis time in the hypochlorous acid water generating unit 201a increases, and the amount of hypochlorous acid water generated increases. This is probably because the amount of hypochlorous acid water extracted from the cathode solution extraction port 211 of the hypochlorous acid water treatment unit 201b also increases.

The hypochlorous acid water supply device 201 simultaneously extracts hypochlorous acid water mainly composed of HClO with high sterilizing power from the anode side and hypochlorous acid water mainly composed of NaClO and NaOH with high detergency from the cathode side. can do. Hypochlorous acid water containing mainly HClO is a solution in which residual components are suppressed, and it is possible to suppress metal corrosion caused by residual components even during space spraying while maintaining sterilization power. On the other hand, hypochlorous acid water containing NaClO and NaOH as a main component cannot be sprayed in space because it is a solution that leaves residual components, but it is a solution with high detergency and is effective in washing areas with acidic dirt such as drains. can bring In the hypochlorous acid water treatment device 1, hypochlorous acid water mainly composed of HClO generated on the anode side is used for space sterilization, while hypochlorous acid mainly composed of NaClO and NaOH is generated on the cathode side on the opposite side. Water can also be used for cleaning.

As described above, according to the hypochlorous acid water supply device 201 according to Embodiment 3-1, the following effects can be obtained.

(1) The hypochlorous acid water supply device 201 includes a meandering electrolysis flow channel configured to be able to supply salt water, and a non-diaphragm electrolysis flow channel (positive and positive electrode inter-electrode flow channel 212) that constitutes the preceding stage of the electrolysis flow channel. a hypochlorous acid water generating unit 201a for continuously electrolytically generating hypochlorous acid water by energizing between a pair of negative and positive electrodes (between the positive electrode 202 and the negative electrode 203) from salt water supplied inside; The hypochlorous acid water supplied from the hypochlorous acid water generating unit 201a is supplied to each of the diaphragm electrolysis flow paths (the positive electrode side flow path 213 and the negative electrode side flow path 214) that constitute the subsequent stage of the electrolysis flow path. and a hypochlorous acid water treatment unit 201b that continuously treats by energizing between a pair of negative and positive electrodes (between the positive electrode 202 and the negative electrode 203). The structure is such that the hypochlorous acid water sent out from the electrolysis channel on the positive electrode 202 side of the hypochlorous acid water treatment unit 201b is supplied to the outside.

According to such a configuration, by supplying salt water to the electrolytic flow path, the hypochlorous acid water generating unit 201a electrolyzes the salt water in the non-diaphragm electrolytic flow path (channel 212 between the negative and positive electrodes) to produce hypochlorous acid. The hypochlorous acid generated in the hypochlorous acid water treatment unit 201b and in the non-diaphragm electrolysis flow channel (the positive electrode side flow channel 213 and the negative electrode side flow channel 214) in the diaphragm electrolysis flow channel (the positive electrode side flow channel 213 and the negative electrode side flow channel 214). By circulating water, it is possible to extract hypochlorous acid water in which cations that cause residual components are separated and reduced from the positive electrode side. Therefore, the hypochlorous acid water supply device 201 of the one-pass type can be provided, which can supply the hypochlorous acid water from which the residual components generated by the electrolysis of the salt water are separated to the outside. In addition, the positive electrode 202 and the negative electrode 203 that are common to the hypochlorous acid water generation unit 201a and the hypochlorous acid treatment unit 1b are used, and the non-diaphragm electrolysis flow channel and the diaphragm electrolysis flow channel generate a voltage between the positive and negative electrodes. Directly connected in the energized state. As a result, in the non-diaphragm electrolysis flow path, the particles flow into the diaphragm electrolysis flow path with a distribution in which anions are present in the vicinity of the positive electrode 202 and cations are present in the vicinity of the negative electrode 203 in a large amount. Therefore, the electrodialysis treatment can be started in a state in which the cations that cause residual components are reduced in advance on the positive electrode 202 side.

(2) In the hypochlorous acid water supply device 201, the non-diaphragm electrolytic flow path (the flow path 212 between the positive and negative electrodes) includes a planar positive electrode 202, a planar negative electrode 203 facing the positive electrode 202, It is composed of a spacer member (positive electrode side spacer 205 and negative electrode side spacer 206 ) provided between the positive electrode 202 and the negative electrode 203 . A pair of negative and negative electrodes (a positive electrode 202 and a negative electrode 203) were formed in a meandering shape by exposing the positive electrode 202 and the negative electrode 203 to the non-diaphragm electrolytic flow path by means of a spacer member. By doing so, the ability to electrolyze salt water can be changed according to the channel shape formed in the spacer member, so that the area and time for electrolyzing salt water can be freely designed.

(3) In the hypochlorous acid water supply device 201, the diaphragm electrolysis flow path (the positive electrode side flow path 213 and the negative electrode side flow path 214) extends along the flow path with the positive electrode 202 exposed. A meandering positive electrode-side flow channel 213 and a meandering negative electrode-side flow channel provided in parallel to face the positive electrode-side flow channel 213, with the negative electrode 203 exposed and extending along the flow channel. 214, and a diaphragm 204 provided to separate the positive electrode side channel 213 and the negative electrode side channel 214 and permeate cations contained in the solution flowing through the channels. The pair of negative and negative electrodes are formed in a meandering shape by exposing the positive electrode 202 to the positive electrode side channel 213 by the positive electrode side spacer 205 and exposing the negative electrode 203 to the negative electrode side channel 214 by the negative electrode side spacer 206 . configured to By doing so, the hypochlorous acid water generated by electrolyzing the salt water is circulated while applying a voltage in the same direction across the diaphragm 204, so that the residual components from the hypochlorous acid water cations can be separated and reduced. Therefore, the hypochlorous acid water treatment unit 201b can produce hypochlorous acid water in which residual components generated by the electrolysis of salt water are reduced.

(4) In the hypochlorous acid water supply device 201, the diaphragm electrolysis flow path (positive electrode-side flow path 213 and negative electrode-side flow path 214) includes a planar positive electrode 202 and a flat surface facing the positive electrode 202. and a positive electrode side spacer 205 that is provided between the positive electrode 202 and the positive electrode side channel 213 and exposes the positive electrode 202 and the negative electrode side channel 213 along the channel. The positive electrode-side channel 213 is composed of the positive electrode 202 and the diaphragm 204 exposed along the channel, and the positive electrode-side spacer 205 . In addition, a flat cathode 203, a flat diaphragm 204 facing the cathode 203, and a cathode 214 provided between the cathode 203 and the diaphragm 204 along the flow path to the cathode side flow path 214. 203 and a cathode-side spacer 206 exposing the diaphragm 204 . The cathode-side channel 214 was composed of the cathode 203 and the diaphragm 204 exposed along the channel, and the cathode-side spacer 206 . By doing so, residual hypochlorous acid water generated by electrolyzing salt water can be controlled by the channel shape formed in the positive electrode side spacer 205 and the channel shape formed in the negative electrode side spacer 206. Since the ability to separate cations that cause components can be changed, the area and time for separating cations that cause residual components from hypochlorous acid water can be freely designed.

(5) In the hypochlorous acid water supply device 201, the spacer member is configured by overlapping the positive electrode side spacer 205 and the negative electrode side spacer 206 together. According to such a configuration, the structure can be simplified, and liquid leakage due to the boundary between the non-diaphragm electrolysis flow path and the diaphragm electrolysis flow path and disturbance of the ion distribution in the flow path can be suppressed to allow circulation.

(6) The hypochlorous acid water supply device 201 is provided at each outlet on the positive electrode 202 side and the negative electrode 203 side of the hypochlorous acid water treatment unit 201b. 212) with salt water, and the supply pump (positive electrode A side supply pump 231 and a cathode side supply pump 232) are provided. The supply pump was adapted to supply the salt water and the hypochlorous acid water from the hypochlorous acid water generator 201a to the positive electrode side channel 213 and the negative electrode side channel 214 at a constant flow rate. As a result, the time during which the voltage is applied in the positive electrode side channel 213 can be made constant, and the time during which the voltage is applied in the negative electrode side channel 214 can be made constant. can. For this reason, the concentration at which the cations that cause residual components in the hypochlorous acid water in the positive electrode-side channel 213 are separated and diluted, and the concentration of residual components in the hypochlorous acid water in the negative electrode-side channel 214 It is possible to stabilize the concentration at which the cations that are the factors are concentrated.

(Embodiment 3-2)
A hypochlorous acid water supply device 220 according to Embodiment 3-2 of the present disclosure will be described with reference to FIG. FIG. 24 is an exploded perspective view of a hypochlorous acid water supply device 220 according to Embodiment 3-2 of the present disclosure. In addition, the hypochlorous acid water supply device 220 according to Embodiment 3-2 described below has the positive electrode 202 and the negative electrode 203 of the hypochlorous acid water supply device 201 according to Embodiment 3-1. It has a tooth-shaped structure. In the description of Embodiment 3-2, substantially the same configurations as those of the hypochlorous acid water supply device 201 according to Embodiment 3-1 are given the same reference numerals, and the description is partially simplified. or omitted.

As shown in FIG. 24, the hypochlorous acid water supply device 220 includes a hypochlorous acid water generation unit 220a that electrolyzes salt water to generate hypochlorous acid water in one pass, and a hypochlorous acid water and a hypochlorous acid water treatment unit 220b that separates and reduces contained residual components in a single pass. In the hypochlorous acid water supply device 220, a pair of positive and negative electrodes (comb-tooth positive electrode 222 and comb-tooth negative electrode 223) are formed into a comb-shaped electrode.

More specifically, the hypochlorous acid water supply device 220 uses a comb-shaped positive electrode 222 and a comb-shaped negative electrode 223 arranged so that the comb-shaped positive electrode 222 is opposed to the comb-shaped positive electrode 222, and electrolyzes them in a meandering manner. It has a configuration in which regions of the comb teeth facing each other are arranged in the channels (the channel 212 between the negative and positive electrodes, and the channel 213 on the positive electrode side and the channel 214 on the negative electrode side). In other words, the hypochlorous acid water supply device 220 has a non-diaphragm electrolysis flow path (positive/positive electrode inter-electrode flow path 212) in the facing portion between the comb tooth positive electrode 222 and the comb tooth negative electrode 223, and a diaphragm following this. Electrolytic flow paths (positive electrode-side flow path 213 and negative electrode-side flow path 214) are formed, respectively, and constitute a hypochlorous acid water generating section 220a and a hypochlorous acid water processing section 220b, respectively. As a result, in the hypochlorous acid water supply device 220, the hypochlorous acid water generating unit 201a electrolyzes salt water in the non-diaphragm electrolysis channel to generate hypochlorous acid water, and further In the processing unit 201b, the hypochlorous acid water generated in the non-diaphragm electrolysis flow path is circulated in the diaphragm electrolysis flow path to separate and reduce the cations that cause residual components from the positive electrode side. can be extracted as

Next, the positive comb electrode 222 and the negative comb electrode 223 will be described with reference to FIG. FIG. 25 is a perspective view showing the manufacturing process of the interdigital electrode (positive interdigital electrode 222 and negative interdigital electrode 223) constituting the hypochlorous acid water supply device 220. FIG.

The comb positive electrode 222 and the comb negative electrode 223 can be taken out by cutting and separating one electrode plate 221 .

The first step is the step of preparing the electrode plate 221 . The electrode plate 221 is a thin flat plate having an area dimension capable of forming two interdigitated electrodes. One surface of the electrode plate 221 is processed with a catalyst.

The second step is the step of cutting the electrode plate 221 . The blade is run in a meandering manner from the lower end to the upper end of the electrode plate 221 to cut the electrode plate 221 . Thereby, the electrode plate 221 is cut corresponding to the comb teeth of the positive comb electrode 222 and the negative comb electrode 223 .

The third step is a step of separating the cut electrode plate 221 into two comb-teeth electrodes (a comb-teeth positive electrode 222 and a comb-teeth negative electrode 223).

The fourth step is a step of inverting one of the cut and separated electrode plates 221 (comb-teeth positive electrode 222 or comb-teeth negative electrode 223) and arranging them to face each other. More specifically, in the fourth step, the catalyst-processed surfaces of the cut and separated electrode plates 221 are placed facing each other to form a pair of positive and negative electrodes.

By doing so, a pair of positive and negative electrodes can be formed. In the fourth step, the two comb-shaped electrodes (comb-shaped positive electrode 222 and comb-shaped negative electrode 223) arranged opposite to each other are connected vertically at the left end or right end, and a plurality of comb teeth are arranged toward the opposite side. It has an elongated structure. The comb teeth of the positive comb electrode 222 and the negative comb electrode 223 extending toward the opposite sides are arranged so as to face each other vertically. When reversing the comb-shaped electrodes, the lower end is flat and the upper end is arranged so that the convex portion is located. This facilitates electrical connection to the upper end convex portion. It is preferable that the convex portion comes to the upper end. In order to reverse one of the comb electrodes (positive comb electrode 222 or negative comb electrode 223), the same catalyst-treated surface of the electrode plate 221 becomes the facing surface of the positive comb electrode 222 and the negative comb electrode 223. can be done. The electrode plate 221 has a platinum-containing catalyst formed on the surface of a titanium base material, and is made of a material that is highly efficient in generating hypochlorous acid by electrolysis. In order to improve the facing property of the comb-shaped positive electrode 222 and the comb-shaped negative electrode 223 when turned upside down, it is preferable to process the comb teeth at an equal pitch. When the electrode plate 221 is cut, the cutting tool passes through, so it is preferable to design the comb tooth shape in consideration of the width of the comb teeth being narrowed because the width of the cutting tool is removed by machining. .

In addition, since the electrode has a comb-teeth shape, the positive electrode packing 207a and the negative electrode packing 207b have a shape in which the comb-teeth positive electrode 222 and the comb-teeth negative electrode 223 are hollowed out.

As described above, according to the hypochlorous acid water supply device 220 according to Embodiment 3-2, the following effects can be obtained.

(7) The hypochlorous acid water supply device 220 cuts one electrode plate 221 with a catalyst processed on one surface in a meandering manner from the lower end to the upper end to form two comb-tooth electrodes (comb-tooth positive electrode 222 and a comb-shaped negative electrode 223), and one of the comb-shaped positive electrode 222 or the comb-shaped negative electrode 223 is reversed and arranged so that the comb-shaped positive electrode 222 and the comb-shaped negative electrode 223 form a pair. It was designed to form cathode and cathode electrodes. By doing so, it is possible to realize a single electrode plate 221 without using two electrode plates 221 to form a pair of positive and negative electrodes, thereby reducing the number of necessary members.

(Embodiment 3-3)
A spatial sterilization system 230 using a hypochlorous acid water supply device 201 according to Embodiment 3-3 of the present disclosure will be described with reference to FIGS. 18 and 26. FIG. FIG. 26 is a schematic diagram of a space sterilization system 230 using a hypochlorous acid water supply device 201 according to Embodiment 3-3 of the present disclosure. A space sterilization system 230 according to Embodiment 3-3 described below is a system incorporating the hypochlorous acid water supply device 201 according to Embodiment 3-1. In the description of Embodiment 3-3, the components substantially similar to those of the hypochlorous acid water supply device 201 according to Embodiment 3-1 are denoted by the same reference numerals, and the description is partially simplified. or may be omitted.

The space sterilization system 230 according to Embodiment 3-3 sprays hypochlorous acid water generated from the hypochlorous acid water supply device 201 from the mist spray device 236 in the bathroom space and to the drain port 238. It is a system that sterilizes and cleans the bathroom space by flushing. The bathroom space corresponds to the "predetermined space" in the claims.

Specifically, as shown in FIG. 26, the space sterilization system 230 includes a hypochlorous acid water supply device 201 (a hypochlorous acid water generation unit 201a and a hypochlorous acid water treatment unit 201b), a positive electrode A side supply pump 231, a negative electrode side supply pump 232, a positive electrode side extraction solution tank 233, a negative electrode side extraction solution tank 234, a positive electrode side extraction solution bathroom pipe 235, a mist spray device 236, and a negative electrode. A side extraction solution bath tubing 237 and a drain 238 are provided.

The hypochlorous acid water generating unit 201a that constitutes the hypochlorous acid water supply device 201 is a part that supplies salt water (aqueous sodium chloride solution) and generates hypochlorous acid water by electrolysis. As described above, the hypochlorous acid water generated by the hypochlorous acid water generating unit 201a contains NaClO and HClO, which are components of the hypochlorous acid water. Other components include NaOH produced by electrolysis, NaCl produced by decomposing NaClO, NaCl remaining after electrolysis of salt water, and the like.

The hypochlorous acid water treatment unit 201b circulates the hypochlorous acid water supplied from the hypochlorous acid water generation unit 201a, and from the positive electrode side channel 213, the hypochlorous acid water containing mainly HClO with high sterilization power is supplied. This is a portion for extracting the positive electrode extracting solution 210a, which is acid water, and for extracting the negative electrode extracting solution 211a, which is hypochlorous acid water mainly containing NaClO and NaOH, from the negative electrode side channel 214 with high detergency. The positive electrode extraction solution 210 a is stored in the positive electrode side extraction solution tank 233 and then sent to the mist spray device 236 through the positive electrode side extraction solution bathroom pipe 235 . Then, the positive electrode extraction solution 210a is sprayed from the mist spray device 236 into the bathroom space. Further, the negative electrode extraction solution 211 a is stored in the negative electrode side extraction solution tank 234 and then sent to the drain port 238 through the negative electrode side extraction solution bathroom piping 237 . The cathode extraction solution 211a is circulated through the drain port 238 and flows through the drain port 238 to the drain pipe.

The positive electrode side supply pump 231 supplies solutions (positive and negative electrode supply solution 209a, positive electrode supply solution 209a, positive electrode supply solution 209a, positive A pump that causes the flow of the electrode extraction solution 210a). At this time, the positive electrode side supply pump 231 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating section 201a, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment section 201b to be constant. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The cathode-side supply pump 232 supplies each solution (the anode-and-positive electrode supply solution 209a, the cathode-side supply solution 209a, the cathode-side supply solution 209a, A pump that causes the flow of the electrode extraction solution 211a). At this time, the cathode-side supply pump 232 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating section 201a, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment section 201b to be constant. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The flow rate of the channel 212 between the negative and positive electrodes is controlled as the total amount of the positive electrode side supply pump 231 and the negative electrode side supply pump 232 . Also, the positive electrode side supply pump 231 and the negative electrode side supply pump 232 correspond to the "supply pump" in the claims.

The positive electrode-side extraction solution tank 233 feeds the positive electrode-side extraction solution 210a, which is hypochlorous acid water containing mainly HClO with high sterilizing power extracted from the positive electrode-side channel 213, to the mist spray device 236. , is a temporary storage tank. The positive electrode side extraction solution tank 233 is connected to a mist spraying device 236 via a positive electrode side extraction solution bathroom piping 235 .

The cathode-side extraction solution tank 234 feeds the cathode-side extraction solution 211a, which is hypochlorous acid water containing NaClO and NaOH with high detergency extracted from the cathode-side channel 214, to the drain port 238. , is a temporary storage tank. The cathode-side extraction solution tank 234 is connected to a drain port 238 via a cathode-side extraction solution bathroom pipe 237 .

The positive electrode side extraction solution bathroom pipe 235 is a pipe for sending liquid from the positive electrode side extraction solution tank 233 to the mist spray device 236 . The positive electrode-side extraction solution bathroom pipe 235 is installed behind the wall and ceiling of the bathroom, and is connected to a mist spraying device 236 installed on the ceiling.

The cathode-side extraction solution bathroom pipe 237 is a pipe for sending liquid from the cathode-side extraction solution tank 234 to the drain port 238 . The cathode-side extraction solution bathroom pipe 237 is installed behind the wall and floor of the bathroom and connected to a drain port 238 .

The mist spraying device 236 is a device that sprays hypochlorous acid water in the form of mist into the bathroom space. More specifically, the mist spraying device 236 sprays the positive electrode extraction solution 210a, which is hypochlorous acid water, conveyed from the positive electrode side extraction solution tank 233 through the positive electrode side extraction solution bathroom piping 235 into a fine mist. It is a device that releases as The mist spraying device 236 is installed so that the spraying part protrudes from the ceiling toward the bathroom so that mist can be sprayed from the ceiling of the bathroom to the entire bathroom. The mist spraying method includes a two-fluid spraying method that uses compressed air to atomize the mist, an ultrasonic method that uses an ultrasonic element to atomize a fine mist of 10 μm or less, or a solution that is released from a rotating body and crushed. and a crushing spray method in which a fine mist of 1 μm or less is sprayed.

The drain port 238 is a connection port for connecting with a drain pipe for discharging water or dirt generated in the bathroom space to the outside of the bathroom space. The negative electrode extracting solution 211a is conveyed from the negative electrode side extracting solution tank 234 to the drain port 238 through the negative electrode side extracting solution bathroom pipe 237. The drain port 238 and the drain pipe connected to the drain port 238 can be cleaned with the negative electrode extraction solution 211a.

As described above, according to the spatial sterilization system 230 using the hypochlorous acid water supply device 201 according to Embodiment 3-3, the following effects can be obtained.

(8) The space sterilization system 230 is connected to the hypochlorous acid water supply device 201 and the positive electrode side channel 213, and uses the hypochlorous acid water delivered from the positive electrode side channel 213 to perform the following: and a mist spraying device 236 for discharging chlorous acid water mist into a predetermined space. According to such a configuration, even if the mist of hypochlorous acid water delivered from the positive electrode side channel 213 is discharged into the predetermined space, residual components remaining in the predetermined space are suppressed. In other words, since the hypochlorous acid water delivered from the positive electrode side channel 213 is hypochlorous acid water in which residual components generated by the electrolysis of salt water are reduced, when sterilizing a predetermined space, sterilization It is possible to suppress the occurrence of metal corrosion due to residual components while maintaining performance.

(9) In the space sterilization system 230, the bathroom space is provided with a drain port 238 for discharging water generated in the bathroom space, and the negative electrode side channel 214 is connected to the drain port 238, The structure is such that the hypochlorous acid water sent out from the negative electrode side channel 214 can be introduced into the drain port 238 . In this way, hypochlorous acid water with high detergency containing an alkaline solution in which cations that cause residual components are concentrated is extracted from the hypochlorous acid water delivered from the cathode-side channel 214. Since it is circulated through the drain port 238 (and the drain pipe connected to the drain port 238), the drain pipe can be cleaned with the alkaline solution.

As described above, the present disclosure has been described based on the third embodiment, but the present disclosure is not limited to the above-described third embodiment, and various modifications and improvements are possible without departing from the scope of the present disclosure. One thing is easy to guess.

(Embodiment 4)
Conventionally, by electrolyzing salt water, hypochlorous acid water containing NaClO as a main component and containing HClO and NaOH is produced. Hypochlorous acid water is known to improve its sterilization power by making it weakly acidic, and a technology is known to control the pH generated using a diaphragm with ion permeability to the weakly acidic side. It is (See Patent Document 1, for example).

However, it cannot be said that NaClO and NaOH, which are residual components, are sufficiently suppressed only by adjusting the pH to be weakly acidic. NaClO and NaOH are components that remain as solids on the surface of the hypochlorous acid water after volatilization, and these residual components deliquesce and re-dissolve in water, thereby promoting metal corrosion. Therefore, when hypochlorous acid water containing many components such as NaClO and NaOH is mist-sprayed, fine residual components are accumulated, which may cause corrosion during long-term use.

In addition, when tap water is used as raw water to generate salt water, there is concern that anions contained in the tap water may cause variations in concentration and characteristics of hypochlorous acid water generated by electrolysis. In addition, cations contained in tap water are components that remain as solids on the surface after volatilization, and these residual components also promote corrosion of metals, so there is also concern about corrosion during long-term use. be.

Therefore, the present disclosure can supply hypochlorous acid water with reduced residual components generated by electrolysis of salt water generated from tap water with reduced anionic components while reducing the anionic components contained in tap water. An object of the present invention is to provide a possible hypochlorous acid water supply device and a space sterilization system using the same.

According to the present disclosure, while reducing the anion component contained in tap water, supply hypochlorous acid water with reduced residual component generated by electrolysis of salt water generated from tap water with reduced anion component. It is possible to provide a hypochlorous acid water supply device and a space sterilization system using the same.

In the hypochlorous acid water supply apparatus according to the present disclosure, the anion component contained in the tap water supplied to the meandering first diaphragm electrolysis flow path is energized between the pair of first cathode and cathode electrodes. a tap water treatment unit for continuously separating the tap water treatment unit, a salt water generation unit for generating salt water by adding a salt component to the tap water solution sent from the tap water electrolysis channel on the negative electrode side of the tap water treatment unit, and a salt water generation unit By energizing between the pair of second negative and positive electrodes from the meandering electrolysis flow channel configured to be able to supply the salt water generated in and the salt water supplied in the non-diaphragm electrolysis flow channel constituting the front stage of the electrolysis flow channel Supplied from the hypochlorous acid water generation unit to each of the hypochlorous acid water generation unit that electrolytically generates hypochlorous acid water continuously and the second membrane electrolysis flow path that constitutes the latter stage of the electrolysis flow path. a hypochlorous acid water generating unit having a hypochlorous acid water treatment section for continuously treating the hypochlorous acid water by energizing between the pair of second negative and positive electrodes. The structure is such that the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is supplied to the outside.

According to such a configuration, it is possible to supply hypochlorous acid water in which residual components generated by electrolysis of salt water generated from tap water with reduced anion components are reduced while reducing the anion components contained in the tap water. can be a hypochlorous acid water supply device capable of More specifically, in the hypochlorous acid water supply device, tap water is supplied to the tap water treatment unit, and a salt component is added to the tap water solution delivered from the tap water electrolysis flow channel on the negative electrode side of the tap water treatment unit. Since the salt water is supplied to the hypochlorous acid water generation unit, the hypochlorous acid water generation unit can generate hypochlorous acid water by electrolyzing the salt water from which the anion component has been separated and reduced. As a result, the generated hypochlorous acid water is suppressed in concentration variations and characteristic variations due to the anion component contained in the tap water. On the other hand, in the hypochlorous acid water generation unit, by supplying salt water from which the anion component has been separated and reduced to the electrolysis channel, the salt water is electrolyzed in the non-diaphragm electrolysis channel in the hypochlorous acid water generation part. In the hypochlorous acid water treatment unit, the hypochlorous acid water generated in the non-diaphragm electrolysis flow path is circulated in the second diaphragm electrolysis flow path, and from the positive electrode side It is possible to extract as hypochlorous acid water in which cationic components that cause residual components are separated and reduced. As a result, when the hypochlorous acid soft water extracted from the positive electrode side is supplied to the outside, it is possible to suppress the occurrence of metal corrosion caused by residual components contained in the hypochlorous acid soft water.

In addition, the second positive and negative electrodes are used in common for the hypochlorous acid water generation unit and the hypochlorous acid water treatment unit, and the non-diaphragm electrolysis flow path and the second diaphragm electrolysis flow path increase the voltage between the second negative and positive electrodes. Directly connected in the energized state. As a result, in the non-diaphragm electrolytic flow path, a second positive ion component is generated in a state in which a large amount of anionic components are present near the positive electrode side and a large amount of positive ion components are present near the negative electrode. Since it flows into the diaphragm electrolysis channel, the electrodialysis treatment can be started in a state in which the positive ion component, which is a factor of the residual component, is reduced in advance on the positive electrode side.

In addition, in the hypochlorous acid water supply apparatus according to the present disclosure, the first diaphragm electrolysis channel has a meandering first cathode side flow in which the first cathode is exposed and extended along the channel. a serpentine first positive electrode-side channel arranged in parallel to face the first negative electrode-side channel, with the first positive electrode extending and exposed along the channel; and a first diaphragm that is provided to separate the electrode-side channel and the first positive electrode-side channel and allows anion components contained in the solution flowing through the channel to permeate. The pair of first negative and positive electrodes exposes the first negative electrode to the first negative electrode side channel by the first negative electrode side spacer, and exposes the first positive electrode to the first positive electrode side channel by the first positive electrode side spacer. By exposing the electrodes, it is configured in a meandering shape. Tap water is configured to flow in the same direction in both the first negative electrode side channel and the first positive electrode side channel. According to such a configuration, the tap water treatment unit circulates the tap water while applying voltage in the same direction across the first diaphragm, so that the anion component contained in the tap water can be continuously separated and reduced. can be done. Therefore, the tap water solution from which the anionic component has been separated and reduced, which is sent from the tap water electrolysis flow path on the negative electrode side of the tap water treatment unit, can be stably supplied to the salt water generation unit.

Further, in the hypochlorous acid water supply device according to the present disclosure, the planar first cathode, the planar first diaphragm facing the first cathode, and the space between the first cathode and the first diaphragm and a first cathode-side spacer that exposes the first cathode and the first diaphragm in the first cathode-side channel along the channel, and the first cathode-side channel has a flow It is composed of a first cathode and a first diaphragm exposed along the path, and a spacer on the first cathode side. A planar first positive electrode, a planar first diaphragm facing the first positive electrode, and a side flow of the first positive electrode provided between the first positive electrode and the first diaphragm along the channel. a first positive electrode-side spacer exposing the first positive electrode and the first diaphragm in the channel, the first positive electrode-side channel having the first positive electrode and the first diaphragm exposed along the channel and a spacer on the side of the first positive electrode. According to such a configuration, the ability to separate and reduce the anion component contained in the tap water is enhanced by the channel shape formed in the first negative electrode side spacer and the channel shape formed in the first positive electrode side spacer. Since it can be changed, it is possible to freely design the area and time for separating and reducing anionic components from tap water.

In addition, in the hypochlorous acid water supply device according to the present disclosure, the non-diaphragm electrolysis channel includes a planar second positive electrode, a planar second negative electrode facing the second positive electrode, and a second positive electrode. It comprises a positive electrode spacer provided between the electrode and the second negative electrode. The pair of second negative and positive electrodes are formed in a meandering shape by exposing the second positive and negative electrodes to the non-diaphragm electrolytic flow path by means of spacers between negative and positive electrodes. According to this configuration, the ability to electrolyze salt water can be changed by the shape of the channel formed in the spacer between the positive and negative electrodes, so that the area and time for electrolyzing the salt water can be freely designed.

In addition, in the hypochlorous acid water supply apparatus according to the present disclosure, the second diaphragm electrolysis flow channel has a meandering second positive electrode side flow in which the second positive electrode is exposed and extended along the flow channel. a meandering second negative electrode-side channel arranged in parallel to face the second positive electrode-side channel, the second negative electrode extending and being exposed along the channel; and a second diaphragm that is provided to separate the electrode-side channel and the second cathode-side channel and allows the passage of cations contained in the solution flowing through the channel. The pair of second negative and positive electrodes exposes the second positive electrode to the second positive electrode side channel by the second positive electrode side spacer, and exposes the second negative electrode to the second negative electrode side channel by the second negative electrode side spacer. By exposing the electrodes, it is configured in a meandering shape. The hypochlorous acid water supplied from the hypochlorous acid water generating section is configured to flow in the same direction in both the second positive electrode side channel and the second negative electrode side channel. According to such a configuration, the hypochlorous acid water generated by electrolyzing the salt water is circulated while applying a voltage in the same direction across the second diaphragm, so that the residual components from the hypochlorous acid water cation components can be continuously separated and reduced. Therefore, as hypochlorous acid water with reduced residual components, it is possible to stably supply the hypochlorous acid water sent from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit to the outside. can.

Further, in the hypochlorous acid water supply device according to the present disclosure, the planar second positive electrode, the planar second diaphragm facing the second positive electrode, and the space between the second positive electrode and the second diaphragm and a second positive electrode-side spacer that exposes the second positive electrode and the second diaphragm in the second positive electrode-side channel along the channel, and the second positive electrode-side channel is provided with the flow channel It is composed of a second positive electrode and a second diaphragm exposed along the path, and a second positive electrode-side spacer. A planar second cathode, a planar second diaphragm facing the second cathode, and a second cathode side flow provided between the second cathode and the second diaphragm along the channel. a second cathode-side spacer that exposes the second cathode and the second diaphragm in the passage, and the second cathode-side passage includes the second cathode and the second diaphragm that are exposed along the passage. and a second cathode-side spacer. According to such a configuration, hypochlorous acid water produced by electrolyzing salt water is converted into Since it is possible to change the ability to separate and reduce the cation components that cause residual components, it is possible to freely design the area and time for separating and reducing the cation components that cause residual components from hypochlorous acid water. can be done.

In addition, in the hypochlorous acid water supply apparatus according to the present disclosure, the cathode-positive electrode spacer is configured by overlapping the second anode-side spacer and the second cathode-side spacer. According to such a configuration, the structure can be simplified, and the leakage of the liquid due to the boundary between the non-diaphragm electrolysis channel and the second membrane electrolysis channel and the disturbance of the ion distribution in the channel can be suppressed to allow circulation. be able to.

Further, in the hypochlorous acid water supply device according to the present disclosure, the first Provided at the negative electrode side supply pump and the first positive electrode side supply pump, and the respective outlets of the positive electrode side and the negative electrode side of the hypochlorous acid water generation unit, supplying salt water to the non-diaphragm electrolysis flow path, A second positive electrode side supply pump and a second negative electrode side supply pump are provided for supplying the hypochlorous acid water electrolytically generated in the hypochlorous acid water generating section to the second diaphragm electrolysis flow path. The first negative electrode side supply pump and the first positive electrode side supply pump supply tap water to the first negative electrode side channel and the first positive electrode side channel, respectively, at a constant flow rate. The second positive electrode side supply pump and the second negative electrode side supply pump supply the hypochlorous acid water electrolytically generated in the hypochlorous acid water generation unit to the second positive electrode side channel and the second negative electrode side channel. It is preferable to supply each at a constant flow rate. By doing so, in the first diaphragm electrolysis channel, the time during which the voltage is applied in the first negative electrode side channel can be made constant, and the voltage in the first positive electrode side channel can be kept constant. The time during which the voltage is applied can be made constant. Therefore, the concentration at which the anion component contained in the tap water in the channel on the first negative electrode side is separated and diluted, and the concentration at which the anion component contained in the tap water in the channel on the first positive electrode side is concentrated are stabilized. can be On the other hand, in the second diaphragm electrolysis channel, the time during which the voltage is applied in the second positive electrode side channel can be made constant, and the voltage is applied in the second negative electrode side channel. You can set the amount of time you spend For this reason, the concentration at which the cation component that causes the residual component in the hypochlorous acid water in the second positive electrode side channel is separated and diluted, and the concentration in the hypochlorous acid water in the second negative electrode side channel It is possible to stabilize the concentration of cationic components that cause residual components.

In addition, the hypochlorous acid water supply apparatus according to the present disclosure includes a drain-side tank that stores the tap water aqueous solution sent from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit. The drain-side tank is connected so that the solution sent from the electrolytic flow path on the cathode side of the hypochlorous acid water generating unit is mixed. According to such a configuration, the tap water aqueous solution with an acidic pH delivered from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit and the electrolysis channel on the negative electrode side of the hypochlorous acid water generation unit are delivered. It is neutralized by mixing with hypochlorous acid water with an alkaline pH, and the mixed solution has an alkaline pH. It is possible to drain the alkaline solution in a state closer to the neutral side than the pH of the alkaline solution.

The space sterilization system according to the present disclosure uses the above-described hypochlorous acid water supply device and, as an external device, hypochlorous acid water sent from the electrolytic flow path on the positive electrode side of the hypochlorous acid water treatment unit. and a sterilization device that emits hypochlorous acid water mist to a predetermined space. According to such a configuration, even if the hypochlorous acid water mist sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit is discharged into the predetermined space, the residual components remaining in the predetermined space are Suppressed. In other words, the hypochlorous acid water delivered from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit contains residual components generated by electrolysis of salt water and residual components due to cationic components contained in tap water. Since the hypochlorous acid water is reduced, it is possible to suppress the occurrence of metal corrosion caused by residual components while maintaining the sterilization performance when sterilizing a predetermined space.

Further, in the spatial sterilization system according to the present disclosure, a predetermined space is provided with a drain pipe for discharging water generated in the predetermined space. The tap water solution sent from the tap water electrolysis channel and the hypochlorous acid water sent from the electrolysis channel on the negative electrode side of the hypochlorous acid water treatment unit are mixed and introduced. there is According to this configuration, the hypochlorous acid water delivered from the electrolysis channel on the negative electrode side of the hypochlorous acid water treatment unit is delivered from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit. Although the pH is neutralized to some extent by an acidic tap water solution, it can be introduced into the drainpipe as highly detergency hypochlorous acid water containing an alkaline solution in which cationic components that cause residual components are concentrated. . Therefore, the inside of the drain pipe can be washed with the hypochlorous acid water introduced into the drain pipe.

The fourth embodiment of the present disclosure will be described below with reference to the drawings. In addition, the following Embodiment 4 is an example that embodies the present disclosure, and does not limit the technical scope of the present disclosure. Each drawing described in the embodiment is a schematic drawing, and the ratio of the size and thickness of each component in each drawing does not necessarily reflect the actual dimensional ratio. .

Embodiment 4 includes at least Embodiment 4-1 and Embodiment 4-2 below.

(Embodiment 4-1)
A hypochlorous acid water supply device 301 according to Embodiment 4-1 of the present disclosure will be described with reference to FIG. FIG. 27 is a cross-sectional image diagram of a hypochlorous acid water supply device 301 according to Embodiment 4-1 of the present disclosure.

The hypochlorous acid water supply device 301 supplies tap water and salt components to perform electrolysis and electrodialysis, and residual components contained in the generated hypochlorous acid water (salt components and Na ⁺ Components containing cations such as ions, Ca ²⁺ ions, and Mg ²⁺ ions (hereinafter also referred to as cationic components), and components containing anions such as SO ₄ ²⁻ ions and NO ₃ ⁻ ions contained in tap water (hereinafter also referred to as anion component)) can be separated and reduced and supplied.

Specifically, as shown in FIG. 27, the hypochlorous acid water supply device 301 includes a tap water treatment unit 302, a hypochlorous acid water generation unit 303, a first cathode side supply pump 318, and a second cathode side supply pump 318. It comprises a first positive electrode side supply pump 319 , a salt water generation unit 320 , a waste water side tank 323 , a second positive electrode side supply pump 338 and a second negative electrode side supply pump 339 .

<Tap water treatment unit>
The tap water treatment unit 302 will be described with reference to FIGS. 27 to 30. FIG. FIG. 28 is a schematic diagram of tap water treatment unit 302 . 29 is an exploded perspective view of the tap water treatment unit 302. FIG. FIG. 30 is a vertical sectional image diagram of the tap water treatment unit 302. As shown in FIG.

The tap water treatment unit 302 is a unit that supplies tap water from the outside and separates and reduces anion components contained in the tap water.

The tap water treatment unit 302 includes a first negative electrode 304, a first positive electrode 305, a first diaphragm 306, a first negative electrode side spacer 307, a first positive electrode side spacer 308, and a first negative electrode A packing 309a, a first positive electrode packing 309b, a first negative electrode side tank housing side surface 310a, a first positive electrode side tank housing side surface 310b, a first negative electrode solution supply port 311, a first negative electrode Electrode solution extraction port 312, first positive electrode solution supply port 313, first positive electrode solution extraction port 314, first negative electrode side channel 315, first positive electrode side channel 316, electrodialysis power supply 317;

The first cathode 304 is a planar electrode plate. The surface of the electrode plate of the first cathode 304 is exposed along the channel of the first cathode-side channel 315 by the first-cathode-side spacer 307 . The first cathode electrode 304 is the electrode that functions as the cathode when current is passed by the electrodialysis power supply 317 . The first negative electrode 304 is arranged substantially parallel to and facing the first positive electrode 305 . The first cathode electrode 304 forms a platinum-containing catalyst on the surface of the titanium substrate. The platinum-containing catalyst is formed at least on the surface of the first cathode 304 that is exposed along the channel 315 on the first cathode side.

The first positive electrode 305 is a planar electrode plate. The surface of the electrode plate of the first positive electrode 305 is exposed along the channel of the first positive electrode side channel 316 by the first positive electrode side spacer 308 . First positive electrode 305 is an electrode that functions as an anode when current is passed by electrodialysis power supply 317 . The first positive electrode 305 is arranged substantially parallel to and facing the first negative electrode 304 . The first positive electrode 305 forms a platinum-containing catalyst on the surface of the titanium substrate. The platinum-containing catalyst is formed at least on the surface of the first positive electrode 305 exposed along the channel of the first positive electrode side channel 316 .

In addition, the first negative electrode 304 and the first positive electrode 305 in the region where electrodialysis is performed by exposing them along the first negative electrode side channel 315 and the first positive electrode side channel 316 have the same shape, and the facing distance is is easier to move ions. If the facing distance is short, the amount of flow through the flow path will be small, so it is desirable to shorten the facing distance to about 10 mm or less while ensuring the required amount of tap water to be treated.

The first negative electrode 304 and the first positive electrode 305 constitute negative and positive electrodes (hereinafter also referred to as first negative and positive electrodes) as a pair of opposing electrodes.

The first diaphragm 306 is a planar thin film. The first diaphragm 306 is arranged substantially parallel to the first negative electrode 304 and the first positive electrode 305 . The first diaphragm 306 is provided so as to separate the first negative electrode side channel 315 and the first positive electrode side channel 316 . The first diaphragm 306 is an ion exchange membrane (anion exchange membrane) capable of transferring anions such as Cl ⁻ ions, SO ₄ ²⁻ ions, and NO ₃ ⁻ ions contained in tap water. The first diaphragm 306 can move anions to the first positive electrode 305 side by applying a voltage to the first negative electrode 304 and the first positive electrode 305 . As this anion exchange membrane, for example, Neocepta manufactured by Astom Co., Ltd. can be used.

The first cathode side spacer 307 is an insulating member. The first cathode side spacer 307 controls the distance between the first cathode 304 and the first diaphragm 306 to a predetermined distance. The first cathode side spacer 307 has a first cathode side channel hole 315 a forming a first cathode side channel 315 inside the first cathode side spacer 307 . The first cathode side channel hole 315 a is a hole that forms the first cathode side channel 315 formed in the first cathode side spacer 307 . The first cathode-side channel hole 315a is formed through the front and back of the first cathode-side spacer 307, and is formed in a meandering manner so as to reciprocate in the horizontal direction and go up one step at a time. ing. In addition, on the surface of the first cathode side spacer 307, a meandering packing member (not shown), which is the same as the first cathode side spacer 307, is provided on the surface of the first cathode side spacer 307 in order to increase the adhesion between the first cathode side 304 and the first diaphragm 306. ) is installed.

The first positive electrode side spacer 308 is an insulating member. The first positive electrode side spacer 308 controls the distance between the first positive electrode 305 and the first diaphragm 306 to a predetermined distance. The first positive electrode side spacer 308 has, inside the first positive electrode side spacer 308 , a first positive electrode side channel hole 316 a forming a first positive electrode side channel 316 . The first positive electrode side channel hole 316 a is a hole that forms the first positive electrode side channel 316 formed in the first positive electrode side spacer 308 . The first positive electrode-side channel hole 316a is formed through the front and back of the first positive electrode-side spacer 308, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. ing. Here, the first negative electrode side channel hole 315a and the first positive electrode side channel hole 316a are arranged so as to face each other. In addition, on the surface of the first positive electrode side spacer 308, a meandering packing member (not shown), which is the same as the first positive electrode side spacer 308, is provided on the surface of the first positive electrode side spacer 308 in order to improve adhesion with the first positive electrode 305 and the first diaphragm 306. ) is installed.

The first cathode packing 309a has a shape in which the outer circumference of the first cathode 304 is hollowed out to the size of the electrode, and is in close contact with the first cathode side spacer 307 to form the first cathode side flow path in the outer circumferential direction. A clamping pressure is applied so that the solution in 315 (the first cathode supply solution 311a, which will be described later) does not leak. As the member of the first cathode packing 309a, insulating silicon rubber can be used. The first cathode packing 309a is thicker than the first cathode 304, and is crushed by the tightening pressure so that the first cathode side spacer 307 and the first cathode side tank housing side surface 310a are crushed. It is desirable that the thickness of the first cathode 304 is maintained while the electrodes are in close contact with each other.

The first positive electrode packing 309b has a shape in which the outer periphery of the first positive electrode 305 is hollowed out to the size of the electrode, and is in close contact with the first positive electrode side spacer 308 to form the first positive electrode side flow channel in the outer peripheral direction. It is attached with a tightening pressure so that the solution in 316 (the first positive electrode supply solution 313a to be described later) does not leak. As a member of the first positive electrode packing 309b, insulating silicone rubber can be used. The first positive electrode packing 309b is thicker than the first positive electrode 305, and is crushed by being pressed by the tightening pressure to form the first positive electrode side spacer 308 and the first positive electrode side tank housing side surface 310b. It is desirable that the thickness of the first positive electrode 305 is retained while the electrodes are in close contact with each other.

The side surface 310a of the first cathode-side tank housing is arranged so as to be in direct contact with the outside of the first cathode 304. The first cathode-side tank housing side surface 310a is provided to suppress the penetration of the solution to the outside of the first cathode 304, and to improve adhesion to the inner surface of the first cathode-side tank housing side surface 310a. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the first negative electrode 304, the efficiency of electrodialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The first positive electrode side tank housing side surface 310b is arranged so as to be in direct contact with the outside of the first positive electrode 305 . The first positive electrode-side tank housing side surface 310b is provided with an inner surface of the first positive electrode-side tank housing side surface 310b in order to suppress penetration of the solution to the outside of the first positive electrode 305, and to improve adhesion. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the first positive electrode 305, the efficiency of electrode dialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The first cathode solution supply port 311 is a connection port for flowing the first cathode supply solution 311a to be electrodialyzed into the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to supply the first cathode supply solution 311 a from the outside of the first cathode 304 , the first cathode solution supply port 311 is processed at a position outside the first cathode 304 .

The first cathode supply solution 311a is tap water. Tap water contains anionic components such as Cl ⁻ ions, SO ₄ ²⁻ ions, and NO ₃ ⁻ ions, as well as cationic components such as Na ⁺ ions, Ca ²⁺ ions, and Mg ²⁺ ions. The content of each ion component differs depending on the region. The first cathode supply solution 311 a is introduced from the first cathode solution supply port 311 into the first cathode side channel 315 .

The first cathode solution extraction port 312 is a connection port for extracting the electrodialyzed first cathode extraction solution 312a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the first cathode extraction solution 312 a outside the first cathode 304 , the first cathode solution extraction port 312 is processed at a position outside the first cathode 304 .

The first negative electrode extraction solution 312a is a tap water solution in which the anion components contained in the tap water are separated and reduced from the tap water, and the cation components contained in the tap water remain in the tap water solution without being separated and reduced. The first cathode extraction solution 312 a is introduced into the first cathode solution extraction port 312 from the first cathode side channel 315 .

More specifically, the first cathode extracting solution 312a is obtained by circulating the first cathode supply solution 311a through the first cathode-side channel 315 to obtain the concentration of hypochlorous acid water from the first cathode supply solution 311a. It is a tap water solution obtained by separating and diluting the anion component contained in tap water, which causes variation and characteristic variation. The pH of this tap water solution is alkaline.

The first positive electrode solution supply port 313 is a connection port for flowing the first positive electrode supply solution 313a to be electrodialyzed into the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to supply the first positive electrode supply solution 313 a from the outside of the first positive electrode 305 , the first positive electrode solution supply port 313 is processed at a position outside the first positive electrode 305 .

The first positive electrode supply solution 313a is tap water similar to the first negative electrode supply solution 311a. First positive electrode supply solution 313 a is introduced from first positive electrode solution supply port 313 into first positive electrode side channel 316 .

The first positive electrode solution extraction port 314 is a connection port for extracting the electrodialyzed first positive electrode extraction solution 314a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the first positive electrode extracting solution 314 a outside the first positive electrode 305 , the first positive electrode solution extracting port 314 is processed at a position outside the first positive electrode 305 .

The first positive electrode extraction solution 314a is a tap water solution obtained by separating and concentrating anion components contained in tap water from tap water. The first positive electrode extraction solution 314 a is led out from the first positive electrode side channel 316 to the first positive electrode solution extraction port 314 .

More specifically, the first positive electrode extraction solution 314a is obtained by circulating the first positive electrode supply solution 313a through the first positive electrode side channel 316 so that the concentration of hypochlorous acid water from the first positive electrode supply solution 313a is reduced. It is a tap water solution obtained by separating and condensing the anion component contained in tap water, which causes variation and characteristic variation. Simultaneously with separation and concentration, hypochlorous acid water is produced by electrolysis of chloride ions ( ^Cl.sup.- ions) contained in tap water, so the pH of this tap water solution is acidic.

Here, the first negative electrode solution supply port 311 and the first positive electrode solution supply port 313 are preferably arranged on the lower side in the vertical direction, and the first negative electrode solution extraction port 312 and the first positive electrode solution extraction The port 314 is desirably positioned vertically upward. When oxygen gas, hydrogen gas, and the like are generated by the electrodialysis reaction and the electrolysis reaction in the flow path, the gas can be more efficiently discharged together with the solution if the extraction port is arranged above.

The first cathode-side channel 315 is a channel formed by a region surrounded by the first cathode 304 , the first cathode-side spacer 307 and the first diaphragm 306 . The first cathode-side channel 315 is formed meandering by the first cathode-side channel hole 315 a of the first cathode-side spacer 307 . More specifically, the first cathode-side channel 315 reciprocates in the horizontal direction, and the number of horizontal reciprocations until the anode-side solution reaches from the bottom to the top increases the distance for electrodialysis. Furthermore, by reducing the channel width of the first cathode side channel 315, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the first cathode-side flow path 315, it is desirable that the first cathode-side flow path 315 has a structure in which the first cathode-side flow path 315 goes from bottom to top in one direction other than reciprocation in the horizontal direction. The first cathode-side channel 315 is provided with the first cathode solution supply port 311 on one side and the first cathode solution extraction port 312 on the other side. A cathode supply solution 311a is circulated.

The first positive electrode side channel 316 is a channel formed by the area surrounded by the first positive electrode 305 , the first positive electrode side spacer 308 and the first diaphragm 306 . The first positive electrode side channel 316 is formed by meandering through the first positive electrode side channel hole 316 a of the first positive electrode side spacer 308 . More specifically, the first positive electrode-side channel 316 reciprocates in the horizontal direction, and the number of horizontal reciprocations until the cathode-side solution reaches from the bottom to the top increases the distance for electrodialysis. Furthermore, by reducing the channel width of the first positive electrode side channel 316, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the first positive electrode-side channel 316, it is desirable that the first positive electrode-side channel 316 has a structure in which the liquid flows in one direction from bottom to top except for reciprocation in the horizontal direction. The first positive electrode side channel 316 is provided with a first positive electrode solution supply port 313 on one side and a first positive electrode solution extraction port 314 on the other side. A positive electrode supply solution 313a is circulating.

The first negative electrode side channel 315 and the first positive electrode side channel 316 face each other in a symmetrical shape with the first diaphragm 306 interposed therebetween. In other words, the first negative electrode side channel 315 and the first positive electrode side channel 316 are configured in a meandering shape facing each other with the first diaphragm 306 interposed therebetween. In this manner, the first cathode-side flow channel 315 and the first positive electrode-side flow channel 316 constitute a so-called diaphragm-containing electrolysis flow channel (hereinafter also referred to as a first diaphragm-containing electrolysis flow channel). Then, the anion component contained in the tap water flowing through the first negative electrode side channel 315 moves to the first positive electrode side channel 316 side. The amount of ionic component movement is controlled by the applied voltage and current and the flow velocity in the channel. The flow rate is controlled by installing a first negative electrode side supply pump 318 in front of the first negative electrode solution supply port 311 and installing a first positive electrode side supply pump 319 in front of the first positive electrode solution supply port 313. are doing. Each pump is desirably a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By flowing the solution at a constant flow rate, the electrodialysis and electrolysis time in the channel can be controlled to be constant. , and the concentrated concentration of the anion component contained in the tap water in the first positive electrode-side channel 316 can be stabilized.

The electrodialysis power supply 317 is a DC power supply that energizes between the pair of first positive and negative electrodes. More specifically, the electrodialysis power supply 317 is a DC power supply connected to the first negative electrode 304 and the first positive electrode 305 and capable of applying current and voltage to the first negative electrode 304 and the first positive electrode 305. be. The electrodialysis power supply 317 may be used as a constant-current controlled power supply to maintain a constant current, or may be used as a constant-voltage controlled power supply to generate a constant voltage.

The first cathode side supply pump 318 is a pump that generates a flow that supplies the first cathode supply solution 311a. More specifically, the first cathode side supply pump 318 is installed upstream of the first cathode solution supply port 311 . The first cathode-side supply pump 318 causes each solution to flow through the first cathode solution supply port 311, the first cathode-side channel 315, the first cathode solution extraction port 312, and the salt water generation tank 321 in this order. A flow of (tap water, first cathode supply solution 311a, first cathode extraction solution 312a) is initiated. At this time, the first cathode side supply pump 318 controls the flow rate of the solution flowing through the tap water treatment unit 302 to be constant. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The first positive electrode side supply pump 319 is a pump that generates a flow that supplies the first positive electrode supply solution 313a. More specifically, the first positive electrode side supply pump 319 is installed upstream of the first positive electrode solution supply port 313 . The first positive electrode side supply pump 319 supplies each solution through the first positive electrode solution supply port 313, the first positive electrode side channel 316, the first positive electrode solution extraction port 314, and the drain side tank 323 in this order. A flow of (tap water, first positive electrode supply solution 313a, first positive electrode extraction solution 314a) is initiated. At this time, the first positive electrode side supply pump 319 controls the flow rate of the solution flowing through the tap water treatment unit 302 to be constant. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The salt water generation unit 320 is a unit that generates salt water by adding a salt component to the tap water solution delivered from the tap water electrolysis channel (first cathode side channel 315) on the negative electrode side of the tap water treatment unit 302. . The salt water generation unit 320 includes a salt water generation tank 321 that stores the solution sent from the first negative electrode side channel 315 of the tap water treatment unit 302, and a salt supply section 322 that supplies salt components to the salt water generation tank 321. configured with

The salt water generation tank 321 temporarily stores the first cathode extraction solution 312 a extracted from the first cathode solution extraction port 312 of the tap water treatment unit 302 , and mixes it with the salt component supplied from the salt supply section 322 . It is a container that mixes and produces salt water to be supplied to the hypochlorous acid water production unit 303 . The tap water solution (first cathode extraction solution 312a) delivered from the first negative electrode-side channel 315 has anion components contained in the tap water separated and reduced. Therefore, the chloride ions (Cl ⁻ ions) contained in the tap water solution stored in the salt water generation tank 321 are less affected by the tap water, and the chloride ion concentration resulting from the salt component added by the salt supply unit 322 is reduced. controlled. The hypochlorous acid water generation unit 303 electrolyzes chloride ions from the salt water generation unit 320 to generate hypochlorous acid water. It becomes possible to control the concentration of acid water by the supply amount of the salt supply unit 322 .

The salt supply unit 322 is a member that supplies the salt water generation tank 321 with a salt component (for example, sodium chloride) required for a target concentration generated by the hypochlorous acid water generation unit 303 . As a form of supply of the salt component, a predetermined amount of salt tablets may be supplied, or a predetermined amount of high-concentration (eg, 3%) salt water may be supplied.

The drain-side tank 323 temporarily stores the first positive electrode extraction solution 314a extracted from the first positive electrode solution extraction port 314 of the tap water treatment unit 302, and the second It is a container for temporarily storing the second cathode extraction solution 333 a extracted from the cathode solution extraction port 333 . The drain-side tank 323 mixes the first positive electrode extraction solution 314a (tap water solution) and the second negative electrode extraction solution 333a (hypochlorous acid water), and stores the mixed solution (mixed hypochlorous acid water). It is constructed such that it can be discharged to the outside from a drain port provided on the side surface of the drain-side tank 323 . When mixing, the first positive electrode extraction solution 314a (tap water solution) with an acidic pH and the second negative electrode extraction solution 333a (hypochlorous acid water) with an alkaline pH are neutralized. , the mixed solution has an alkaline pH. That is, the drain-side tank 323 can drain the mixed solution in a state where the pH of the second cathode extraction solution 333a (hypochlorous acid water) is closer to the neutral side than the pH.

<Hypochlorous acid water generation unit>
The hypochlorous acid water generating unit 303 will be described with reference to FIGS. 27 and 32 to 34. FIG. FIG. 32 is a schematic diagram of the hypochlorous acid water generation unit 303. As shown in FIG. 33 is an exploded perspective view of the hypochlorous acid water generating unit 303. FIG. FIG. 34 is a vertical cross-sectional image diagram of the hypochlorous acid water generating unit 303 .

The hypochlorous acid water generation unit 303 is a one-pass type that generates hypochlorous acid water by electrolyzing the salt water supplied from the salt water generation unit 320, and further separates and reduces the residual components contained in the hypochlorous acid water. is a unit of

The hypochlorous acid water generation unit 303 includes a hypochlorous acid water generation unit 303a, a hypochlorous acid water treatment unit 303b, an electrolysis/electrodialysis power source 337, a second positive electrode side supply pump 338, a and a two-cathode-side supply pump 339 .

The hypochlorous acid water generation unit 303a is a member that electrolyzes the salt water supplied from the salt water generation unit 320 to generate hypochlorous acid water in one pass. The hypochlorous acid water generator 303a includes a second positive electrode 324, a second negative electrode 325, a second positive electrode-side spacer 327, a second negative electrode-side spacer 328, and a second positive electrode packing 329a. , a second negative electrode packing 329b, a second positive electrode side tank housing side surface 330a, a second negative electrode side tank housing side surface 330b, a second negative electrode side electrode solution supply port 331, and a second positive electrode solution extraction. A port 332 , a second cathode solution extraction port 333 , and a second channel 334 between the negative and positive electrodes are provided.

The hypochlorous acid water treatment unit 303b is a member that separates and reduces residual components contained in the hypochlorous acid water supplied from the hypochlorous acid water generation unit 303a in a single pass. The hypochlorous acid water treatment unit 303b includes a second positive electrode 324, a second negative electrode 325, a second diaphragm 326, a second positive electrode-side spacer 327, a second negative electrode-side spacer 328, a second A positive electrode packing 329a, a second negative electrode packing 329b, a second positive electrode side tank housing side surface 330a, a second negative electrode side tank housing side surface 330b, a second negative electrode solution supply port 331, A second positive electrode solution extraction port 332 , a second negative electrode solution extraction port 333 , a second positive electrode side channel 335 , and a second negative electrode side channel 336 are provided.

The second positive electrode 324 is a planar electrode plate. The surface of the electrode plate of the second positive electrode 324 is exposed along the channel 334 between the negative and positive electrodes and the channel 335 on the second positive electrode side by means of the spacer 327 on the side of the second positive electrode. The second positive electrode 324 is an electrode that functions as an anode when current is passed by the electrolysis/electrodialysis power source 337 . The second positive electrode 324 is arranged substantially parallel to and facing the second negative electrode 325 . The second positive electrode 324 has a platinum-containing catalyst formed on the surface of a titanium base material, and is made of a material that is highly efficient in generating hypochlorous acid by electrolysis. The platinum-containing catalyst is formed at least on the surface of the second positive electrode 324 exposed along the second channel 334 between the negative and positive electrodes and the channel 335 on the side of the positive electrode. After the electrolysis of salt water, the main purpose is to move cations by electrodialysis to generate hypochlorous acid water that suppresses NaClO and NaOH, which are the residual components, but it is made by decomposing from NaClO. NaCl remaining after the electrolysis of NaCl and salt water has not been completely electrolyzed can be converted to hypochlorous acid by means of platinum electrodes.

The second cathode 325 is a planar electrode plate. The surface of the electrode plate of the second negative electrode 325 is exposed along the channel 334 between the negative and positive electrodes and the channel 336 on the second negative electrode side by means of the spacer 328 on the side of the second negative electrode. The second cathode electrode 325 is an electrode that functions as a cathode when current is passed by the electrolysis/electrodialysis power source 337 . The second negative electrode 325 is arranged substantially parallel to and facing the second positive electrode 324 . The second negative electrode 325 forms a platinum-containing catalyst on its surface, similar to the second positive electrode 324 . The platinum-containing catalyst is formed on the surface of the second negative electrode 325 exposed along at least the second channel 334 between the negative and positive electrodes and the channel 335 on the side of the positive electrode. In addition, the second positive electrode 324 and the second negative electrode 325 in the region exposed along the second positive electrode side flow path 335 and the second negative electrode side flow path 336 and subjected to electrodialysis have the same shape, and the facing distance is is easier to move ionic components. If the facing distance is short, the flow rate in the flow path will decrease, and the amount of hypochlorous acid water that can be generated will also decrease. is desirable.

The second positive electrode 324 and the second negative electrode 325 constitute negative and positive electrodes (hereinafter also referred to as second negative and positive electrodes) as a pair of opposing electrodes.

The second diaphragm 326 is a planar thin film. The second diaphragm 326 is arranged substantially parallel to and facing the second positive electrode 324 and the second negative electrode 325 . The second diaphragm 326 is provided so as to separate the second positive electrode side channel 335 and the second negative electrode side channel 336 . The second diaphragm 326 is an ion exchange membrane (cation exchange membrane) capable of transferring cations such as Na ⁺ ions related to NaClO and NaOH, which are residual components of hypochlorous acid water. In addition to Na ⁺ ions, cations such as Ca ²⁺ ions and Mg ²⁺ ions contained in tap water can also be moved in the same manner to separate and reduce them. The second diaphragm 326 can move the cationic component to the second negative electrode 325 by applying a voltage to the second positive electrode 324 and the second negative electrode 325 . Examples of the cation exchange membrane include Nafion manufactured by DuPont. The second diaphragm 326 is arranged in the rear stage (the latter part) of the channel, and the part having the second diaphragm 326 becomes the hypochlorous acid water treatment part 303b. On the contrary, the part without the second diaphragm 326 in the front stage (first half part) of the flow path becomes the hypochlorous acid water generating part 303a. The size of the second diaphragm 326 determines the area of the hypochlorous acid water generating section 303a and the area of the hypochlorous acid water processing section 303b. Specifically, if you want to increase the ratio of electrolysis time of salt water, the size of the second diaphragm 326 is reduced, and if you want to increase the ratio of electrodialysis time of hypochlorous acid water, the second diaphragm 326 size is increased. Since the cationic component is concentrated on the second negative electrode 325 side, there is a possibility that scale components contained in tap water or the like may be deposited during long-term use. In order to reduce scale accumulation, for example, each time water is passed through the hypochlorous acid water generation unit 303, the potentials of the second positive electrode 324 and the second negative electrode 325 are reversed to dissolve adhered scale. . When it is assumed that the electrodes will be used with their polarities reversed, it is desirable that the second positive electrode 324 and the second negative electrode 325 be similarly treated with a catalyst containing platinum.

The second positive electrode side spacer 327 is an insulating member. The second positive electrode side spacer 327 controls the distance between the second positive electrode 324 and the second diaphragm 326 to a predetermined distance. The second positive electrode side spacer 327 has, inside the second positive electrode side spacer 327, a second positive electrode side channel hole 335a that forms a second positive electrode side channel 335, which will be described later. The second positive electrode side channel hole 335 a is a hole that forms the second positive electrode side channel 335 formed in the second positive electrode side spacer 327 . The second positive electrode side channel hole 335a is formed through the front and back of the second positive electrode side spacer 327, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. ing. In addition, on the surface of the second positive electrode side spacer 327, a meandering packing member (not shown), which is the same as the second positive electrode side spacer 327, is provided on the surface of the second positive electrode side spacer 327 in order to increase the adhesion to the second positive electrode 324 and the second diaphragm 326. ) is installed.

The second cathode side spacer 328 is an insulating member. The second cathode-side spacer 328 controls the distance between the second cathode 325 and the second diaphragm 326 to a predetermined distance. The second cathode-side spacer 328 has a second cathode-side channel hole 336a inside the second cathode-side spacer 328, which forms a second cathode-side channel 336, which will be described later. The second cathode side channel hole 336 a is a hole that forms the second cathode side channel 336 formed in the second cathode side spacer 328 . The second cathode-side channel hole 336a is formed through the front and back of the second cathode-side spacer 328, and is formed in a meandering manner so as to reciprocate in the horizontal direction and go up one step at a time. ing. Here, the second negative electrode side channel hole 336a and the second positive electrode side channel hole 335a are arranged so as to face each other. In addition, on the surface of the second cathode side spacer 328, a meandering packing member (not shown), which is the same as the second cathode side spacer 328, is provided in order to improve adhesion with the second cathode 325 and the second diaphragm 326. ) is installed.

In the hypochlorous acid water generating part 303a, the second positive electrode side spacer 327 and the second negative electrode side spacer 328 are in direct contact to act as a negative electrode spacer between the second positive electrode 324 and the second negative electrode 325. Function.

A second positive electrode side spacer 327 and a second negative electrode side spacer 328 are interposed between the second positive electrode 324 and the second negative electrode 325 in the hypochlorous acid water generating part 303a. In the hypochlorous acid water treatment part 303b, a second positive electrode side spacer 327, a second diaphragm 326 and a second negative electrode side spacer 328 are interposed between the second positive electrode 324 and the second negative electrode 325. As shown in FIG. The second positive electrode 324 and the second negative electrode 325 are arranged substantially parallel to each other. The thickness of the second cathode-side spacer 328 is reduced by the thickness of the second diaphragm 326 . Arranged on the surfaces of the second positive electrode side spacer 327 and the second negative electrode side spacer 328 as a means for absorbing the thickness of the second diaphragm 326 with the thickness of the second positive electrode side spacer 327 and the second negative electrode side spacer 328 The second positive electrode side spacer 327 and the second negative electrode side spacer 327 and the second negative electrode are formed by designing the packing member to have a thickness greater than that of the second diaphragm 326, and deforming the packing member with a material such as silicon resin that absorbs the shape. By applying pressure from both sides of the side spacer 328, the thickness of the second diaphragm 326 can be absorbed by the packing member, while preventing liquid leakage, which is the original purpose of the packing member.

The second positive electrode packing 329a has a shape in which the outer periphery of the second positive electrode 324 is hollowed out to the size of the electrode, and is in close contact with the second positive electrode side spacer 327 to form a second positive electrode side flow channel in the outer peripheral direction. It is attached with tightening pressure so that the solution in 335 (the second negative electrode supply solution 331a to be described later) does not leak. As a member of the second positive electrode packing 329a, insulating silicon rubber can be used. The second positive electrode packing 329a is thicker than the second positive electrode 324, and is crushed by being pressed by the tightening pressure, thereby connecting the second positive electrode side spacer 327 and the second positive electrode side tank housing side surface 330a. It is desirable that the thickness of the second positive electrode 324 is retained while the electrodes are in close contact with each other.

The second cathode packing 329b has a shape in which the outer circumference of the second cathode 325 is hollowed out to the size of the electrode. It is attached with tightening pressure so that the solution in 336 (the second negative electrode supply solution 331a to be described later) does not leak. As the member of the second cathode packing 329b, insulating silicone rubber can be used. The second cathode packing 329b is thicker than the second cathode 325, and is crushed by the tightening pressure so that the second cathode side spacer 328 and the second cathode side tank housing side surface 330b are crushed. It is desirable that the thickness of the second cathode 325 be maintained while adhering to the .

The second positive electrode side tank housing side surface 330a is arranged so as to be in direct contact with the outside of the second positive electrode 324 . The second positive electrode-side tank housing side surface 330a is provided with an inner surface of the second positive electrode-side tank housing side surface 330a to increase adhesion in order to prevent the solution from permeating to the outside of the second positive electrode 324. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the second positive electrode 324, the efficiency of electrodialysis can be improved if the solution can be prevented from flowing out of the electrode.

The second cathode side tank housing side surface 330b is arranged so as to be in direct contact with the outside of the second cathode 325 . The second cathode-side tank housing side surface 330b is provided with an inner surface of the second cathode-side tank housing side surface 330b in order to prevent the solution from permeating to the outside of the second cathode 325, and to improve adhesion. packing (not shown) is attached, and it is desirable to apply tightening pressure to suppress the solution from flowing to the outside of the electrode. In addition, even if the solution flows around the outside of the electrode, leakage does not occur to the outside. Since the platinum-containing catalyst is formed only on the inner surface of the second negative electrode 325, the efficiency of electrode dialysis can be improved if the solution can be prevented from flowing to the outside of the electrode.

The second negative electrode solution supply port 331 is a connection port for flowing salt water to be electrolyzed into the second negative electrode inter-electrode channel 334, and is attached with a connector (not shown) to which a tube can be connected. In order to supply salt water from the outside of the second positive electrode 324 , the second negative electrode solution supply port 331 is processed at a position on the outer circumference of the second positive electrode 324 . The second positive electrode solution supply port 331 is processed at a position outside both the second positive electrode 324 and the second negative electrode 325. Only one of the positions of may be processed.

The second negative electrode supply solution 331 a is salt water supplied from the salt water generation unit 320 . More specifically, it is salt water produced by adding and mixing salt components in the salt supply unit 322 to the tap water solution from which the anion components have been separated and reduced in the tap water treatment unit 302 . A second negative electrode supply solution 331a is introduced from a second negative electrode solution supply port 331 into a second channel 334 between negative and positive electrodes.

The second positive electrode solution extraction port 332 is a connection port for taking out the electrodialyzed second positive electrode extraction solution 332a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the second positive electrode extracting solution 332 a outside the second positive electrode 324 , the second positive electrode solution extracting port 332 is processed at a position outer than the second positive electrode 324 .

The second positive electrode extraction solution 332a is hypochlorous acid water containing HClO as the main component. The second positive electrode extracting solution 332 a is introduced into the second positive electrode solution extracting port 332 from the second positive electrode side channel 335 .

More specifically, the second positive electrode extraction solution 332a is obtained by electrolyzing the second negative electrode supply solution 331a in the second positive electrode channel 334, and then circulating it in the second positive electrode side channel 335. It is a solution that separates and dilutes the cationic components that cause residual components. Since hypochlorous acid water produced by electrolyzing salt water generated from tap water from which anion components have been removed in the hypochlorous acid water production unit 303a is used, the second positive electrode extraction solution 332a contains , Na ⁺ ions mainly due to salt components, and Ca ²⁺ ions and Mg ²⁺ ions contained in the tap water solution are separated and diluted to form hypochlorous acid water containing HClO as the main component. Therefore, the pH of this hypochlorous acid water is acidic.

The second cathode solution extraction port 333 is a connection port for taking out the electrodialyzed second cathode extraction solution 333a from the channel, and is equipped with a connector (not shown) to which a tube can be connected. In order to extract the second cathode extraction solution 333 a outside the second cathode 325 , the second cathode solution extraction port 333 is processed at a position outside the second cathode 325 .

The second cathode extraction solution 333a is hypochlorous acid water containing NaClO and NaOH, and Ca(OH) ₂ and Mg(OH) ₂ depending on the components of tap water used as raw water. The second cathode extraction solution 333 a is led out from the second cathode side channel 336 to the second cathode solution extraction port 333 .

More specifically, the second negative electrode extraction solution 333a is obtained by electrolyzing the second negative electrode supply solution 331a in the second negative electrode channel 334, and then circulating it in the second negative electrode side channel 336. It is a concentrated solution of cationic components that cause residual components. Since the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 303a is used, the Na ⁺ ions, which are cations, are separated and concentrated in the second negative electrode extraction solution 333a. By being generated as NaOH, it becomes hypochlorous acid water containing NaOH and NaClO as main components. Furthermore, when tap water containing Ca ²⁺ ions and Mg ²⁺ ions is used as raw water, Ca(OH) ₂ and Mg(OH) ₂ are produced together. Therefore, the pH of this hypochlorous acid water is alkaline.

Here, the second negative electrode solution supply port 331 is preferably arranged on the lower side in the vertical direction, and the second positive electrode solution extraction port 332 and the second negative electrode solution extraction port 333 are preferably arranged on the upper side in the vertical direction. should be placed in When oxygen gas, hydrogen gas, and the like are generated by the electrodialysis reaction and the electrolysis reaction in the flow path, the gas can be more efficiently discharged together with the solution if the extraction port is arranged above.

The second cathode-positive electrode channel 334 is a channel formed in a region surrounded by the second positive electrode 324 , the second positive electrode-side spacer 327 , the second negative electrode-side spacer 328 , and the second negative electrode 325 . It is a so-called non-diaphragm electrolysis flow path. The second anode-positive electrode channel 334 has a structure in which the second positive electrode-side channel hole 335a of the second positive electrode-side spacer 327 and the second negative electrode-side channel hole 336a of the second negative electrode-side spacer 328 are overlapped. It is composed by meandering. More specifically, the second channel between positive and negative electrodes 334 reciprocates in the horizontal direction, and the number of reciprocations in the horizontal direction increases the distance for electrolysis until the solution reaches from the bottom to the top. Furthermore, by reducing the channel width of the second cathode-positive electrode channel 334, the distance becomes longer, and the electrolysis time can be lengthened. In order to reduce backflow of the liquid in the second channel 334 between the negative and positive electrodes, it is desirable that the second channel 334 between the negative and positive electrodes has a structure from bottom to top in one direction other than reciprocating in the horizontal direction. The second cathode-positive electrode channel 334 is connected to a second positive electrode-side channel 335 and a second negative electrode-side channel 336, and a second cathode-positive electrode supply solution 331a flows therein. The amount of electrolysis is controlled by the applied voltage current and flow velocity in the channel. The flow rate is controlled by installing a second positive electrode side supply pump 338 after the second positive electrode solution extraction port 332 and installing a second negative electrode side supply pump 339 after the second negative electrode solution extraction port 333 . are doing. Each supply pump is desirably of a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By flowing each solution at a constant flow rate, it is possible to control the time for electrolysis in the channel to be constant, so that the concentration of the hypochlorous acid water to be extracted can be stably controlled.

Although the electrolyzed hypochlorous acid water is mixed in the flow process in the second anode-positive electrode passage 334, a large amount of Cl ⁻ ions, which are the anionic component of the salt water, are distributed near the second anode 324. However, in the vicinity of the second negative electrode 325, the salt water flows with a concentration gradient such that Na ⁺ ions, which are cationic components of salt water, are distributed in large numbers. Therefore, when electrolysis is performed between a pair of second negative and positive electrodes, an acidic solution flows in the vicinity of the second positive electrode 324 and an alkaline solution flows in the vicinity of the second negative electrode 325. . Therefore, the hypochlorous acid water, which is more acidic and more alkaline, flows through the second positive electrode-side channel 335 and the second negative electrode-side channel 336, respectively. Specifically, acidic hypochlorous acid water containing a large amount of HCl and HClO is circulated in the second positive electrode side channel 335, and alkaline hypochlorous acid water containing a large amount of NaOH is circulated in the second negative electrode side channel 336. Chlorate water is extracted.

The second positive electrode side channel 335 is a channel formed by the area surrounded by the second positive electrode 324 , the second positive electrode side spacer 327 and the second diaphragm 326 . The second positive electrode side channel 335 is formed by meandering second positive electrode side channel holes 335 a of the second positive electrode side spacer 327 . More specifically, the second positive electrode-side channel 335 reciprocates in the horizontal direction, and the number of horizontal reciprocations until the anode-side solution reaches from the bottom to the top increases the distance for electrodialysis. Furthermore, by reducing the channel width of the second positive electrode side channel 335, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the second positive electrode-side channel 335, it is desirable that the second positive electrode-side channel 335 has a structure in which the second positive electrode-side channel 335 goes from bottom to top in one direction other than reciprocating in the horizontal direction. One of the second positive electrode-side channels 335 is connected to the second channel 334 between negative and positive electrodes, and the other is provided with a second positive electrode solution extraction port 332, and hypochlorous acid water is generated inside. Hypochlorous acid water generated by electrolyzing salt water is distributed in the section 303a.

The second cathode-side channel 336 is a channel formed by the area surrounded by the second cathode 325 , the second cathode-side spacer 328 and the second diaphragm 326 . The second cathode-side channel 336 is formed by meandering second cathode-side channel holes 336 a of the second cathode-side spacer 328 . More specifically, the second cathode-side channel 336 reciprocates in the horizontal direction, and the distance for electrodialysis is obtained by the number of horizontal reciprocations until the cathode-side solution reaches from the bottom to the top. Furthermore, by reducing the flow path width of the second cathode side flow path 336, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the second cathode-side channel 336, it is desirable that the second cathode-side channel 336 has a structure in which liquid flows in one direction from bottom to top except for reciprocation in the horizontal direction. One side of the second negative electrode side channel 336 is connected to the second channel 334 between negative and positive electrodes, and the other side is provided with a second negative electrode solution extraction port 333, and hypochlorous acid water is generated inside. Hypochlorous acid water generated by electrolyzing salt water is distributed in the section 303a.

The second positive electrode side channel 335 and the second negative electrode side channel 336 face each other in a symmetrical shape with the second diaphragm 326 interposed therebetween. In other words, the second positive electrode-side channel 335 and the second negative electrode-side channel 336 are formed in meandering shapes facing each other with the second diaphragm 326 interposed therebetween. In this manner, the second positive electrode-side flow channel 335 and the second negative electrode-side flow channel 336 constitute a so-called diaphragm-containing electrolysis flow channel (hereinafter also referred to as a second diaphragm-containing electrolysis flow channel). Then, the Na ⁺ ions contained in the hypochlorous acid water flowing through the second positive electrode side channel 335, and the Ca ²⁺ ions and Mg ²⁺ ions contained in the tap water flow into the second negative electrode side flow. Move to the road 336 side. The amount of ionic component movement is controlled by the applied voltage and current and the flow velocity in the channel. The flow rate is controlled by installing a second positive electrode side supply pump 338 after the second positive electrode solution extraction port 332 and installing a second negative electrode side supply pump 339 after the second negative electrode solution extraction port 333 . are doing. Each pump is desirably of a system that can be controlled at a constant flow rate, and for example, a tube pump can be used. By flowing the solution at a constant flow rate, the time for electrodialysis and electrolysis in the flow path can be controlled constantly, so the concentration of the hypochlorous acid water to be extracted can be stably controlled.

In the hypochlorous acid water generation unit 303, a second cathode-positive electrode channel 334 constituting a non-diaphragm electrolysis channel, followed by a second positive electrode side channel 335 constituting a diaphragm electrolysis channel and a second Together with the cathode-side channel 336, the meandering electrolysis channel as the hypochlorous acid water generating unit 303 is configured in a one-pass manner. That is, in the meandering electrolytic flow path, the second cathode-positive electrode flow path 334 constitutes the front stage of the electrolytic flow path, and the second positive electrode-side flow path 335 and the second negative electrode-side flow path 336 constitute the electrolytic flow path. It constitutes the rear stage.

The electrolysis/electrodialysis power supply 337 is a DC power supply that energizes between the pair of second positive and negative electrodes. More specifically, the electrolysis/electrodialysis power supply 337 is connected with the second positive electrode 324 and the second negative electrode 325, and can apply current and voltage to the second positive electrode 324 and the second negative electrode 325. DC power supply. The electrolysis/electrodialysis power supply 337 may be used as a constant-current controlled power supply to maintain a constant current, or may be used as a constant-voltage controlled power supply to generate a constant voltage. The electrolysis/electrodialysis power supply 337 applies current and voltage to the second positive electrode 324 and the second negative electrode 325 common to the hypochlorous acid water generating section 303a and the hypochlorous acid water processing section 303b. In other words, the electrolysis/electrodialysis power supply 337 functions as a power supply for the electrodes that cause electrolysis in the hypochlorous acid water generating unit 303a, and a power supply for the electrodes that causes electrodialysis in the hypochlorous acid water processing unit 303b. function as In order to reduce scale accumulation, the electrolysis/electrodialysis power supply 337, for example, each time the hypochlorous acid water is supplied to the hypochlorous acid water generation unit 303, the second positive electrode 324 and the second negative electrode The potential of the electrode 325 may be switched to reverse the polarity and control may be performed to dissolve the adhering scale.

The second positive electrode side supply pump 338 is a pump that generates a flow for extracting the second positive electrode extraction solution 332a. More specifically, the second positive electrode side supply pump 338 is installed after the second positive electrode solution extraction port 332 . Then, the second positive electrode side supply pump 338 supplies the second negative electrode solution supply port 331, the second positive electrode channel 334, the second positive electrode side channel 335, and the second positive electrode solution extraction port 332 in this order. A flow of each solution (second cathode electrode supply solution 331a, second anode extraction solution 332a) is caused to flow. At this time, the second positive electrode side supply pump 338 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating section 303a, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment section 303b to be constant. do. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The second cathode side supply pump 339 is a pump that generates a flow for extracting the second cathode extraction solution 333a. More specifically, the second cathode side supply pump 339 is installed after the second cathode solution extraction port 333 . Then, the second negative electrode side supply pump 339 supplies the second negative electrode solution supply port 331, the second negative electrode channel 334, the second negative electrode side channel 336, and the second negative electrode solution extraction port 333 in this order. A flow of each solution (second cathodic electrode supply solution 331a, second cathodic electrode extraction solution 333a) is caused to flow. At this time, the second cathode side supply pump 339 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating section 303a, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment section 303b to be constant. do. Examples of pumps capable of delivering liquid at a constant flow rate include tube pumps and diaphragm pumps.

The flow rate of the second cathode-positive electrode flow path 334 is controlled as the total amount of the second anode-side supply pump 338 and the second cathode-side supply pump 339 .

As described above, the hypochlorous acid water supply device 301 is composed of each member.

Next, the processing operation in the tap water processing unit 302 will be described with reference to FIGS. 30 and 31. FIG. FIG. 31 is a horizontal sectional image diagram of the tap water treatment unit.

As shown in FIGS. 30 and 31, in the tap water treatment unit 302, a first cathode supply solution 311a, which is tap water, passes through a first cathode solution supply port 311 and continues to the first cathode side channel 315. A first positive electrode supply solution 313 a , which is tap water, is continuously supplied to the first positive electrode side channel 316 through the first positive electrode solution supply port 313 . Then, the first cathode supply solution 311a supplied from the first cathode solution supply port 311 flows through the meandering first cathode side channel 315, and flows through the first cathode solution supply port. A first positive electrode supply solution 313a supplied from 313 flows through a first positive electrode side channel 316 which is also formed in a meandering manner. At this time, the first negative electrode supply solution 311a and the first positive electrode supply solution 313a face each other with the first diaphragm 306 interposed therebetween and flow in the same direction to Voltages are applied to the first negative electrode 304 and the first positive electrode 305 at both ends at the same time as they flow through the channel 316 . When a voltage is applied, the positive ion components are attracted to the first negative electrode 304 side, and the negative ion components (Cl ⁻ ions, SO ₄ ²⁻ ions, and NO ₃ ^-ions, etc.) are attracted. Since the first diaphragm 306 is composed of a membrane that is permeable only to anion components, the anion component (Cl ⁻ ion , SO ₄ ²⁻ ions, NO ₃ ⁻ ions, etc.) permeate the first diaphragm 306, pass through the first positive electrode supply solution 313a in the first positive electrode side channel 316, and pass through the first positive electrode 305 side. will attract the anionic component. On the contrary, since the cationic component flowing through the first positive electrode side channel 316 cannot permeate the first diaphragm 306, only the cationic component contained in the first negative electrode side channel 315 is transferred to the first negative electrode 304. Attracted. By repeating this, the anion component contained in the first negative electrode supply solution 311a flowing through the first negative electrode side channel 315 is converted into the first positive electrode supply solution 313a flowing through the first positive electrode side channel 316. , electrodialysis progresses, and the first negative electrode supply solution 311a flowing through the first negative electrode-side channel 315 has anion components separated and diluted, and flows through the first positive electrode-side channel 316. The first positive electrode supply solution 313a is extracted by concentrating anion components. As a result, anion components (Cl ⁻ ions, SO ₄ ²⁻ ions, NO ₃ ⁻ ions, etc.) contained in the tap water are separated from the first cathode solution extraction port 312 as the first cathode extraction solution 312a. A diluted tap water solution is extracted. On the contrary, from the first positive electrode solution extraction port 314, the tap water solution in which the anion component contained in the tap water is separated and concentrated is extracted as the first positive electrode extraction solution 314a. In addition, hypochlorous acid water is generated and contained by electrolysis of ^Cl.sup.- ions contained in tap water.

In the treatment operation in the tap water treatment unit 302, the amount of movement of anion components is increased by lengthening the electrodialysis time in the first negative electrode side channel 315 and the first positive electrode side channel 316. As a result, the anion component contained in the tap water of the first cathode extraction solution 312a can be further reduced. In order to lengthen the electrodialysis time, it is necessary to lengthen the distance between the first negative electrode side channel 315 and the first positive electrode side channel 316. It is formed in a meandering manner so that it rises one by one, and the distance for electrodialysis is earned by the number of horizontal reciprocations until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional areas of the first negative electrode side channel 315 and the first positive electrode side channel 316, the distance becomes longer, and the electrodialysis time can be lengthened.

Each pump (first negative electrode side supply pump 318 and first positive electrode side supply pump 319 ), but may be different from each other. Different flow rates affect the concentration of each solution extracted. For example, when the flow velocity in the first cathode-side channel 315 is relatively increased and the flow velocity in the first positive electrode-side channel 316 is relatively decreased, the first cathode-side channel 315 and the second The first positive electrode extraction solution 314a extracted from the first positive electrode side channel 316 is a tap water solution with a small amount and high concentration compared to the case where the flow rate of the one positive electrode side channel 316 is the same. Therefore, when draining the first positive electrode extraction solution 314a, it is desirable to reduce the flow velocity of the first positive electrode side channel 316. FIG.

Next, with reference to FIGS. 34 and 35, the processing operation of the hypochlorous acid water generation section 303a of the hypochlorous acid water generation unit 303 will be described. FIG. 35 is a horizontal sectional image diagram of the hypochlorous acid water generating part 303a of the hypochlorous acid water generating unit 303. FIG.

As shown in FIGS. 34 and 35, in the hypochlorous acid water generating section 303a of the hypochlorous acid water generating unit 303, a second negative electrode supply solution 331a, which is salt water, is passed through a second negative electrode solution supply port 331 to supply a second negative electrode supply solution 331a. is continuously supplied to the second cathode-positive electrode channel 334 . Then, the second negative electrode supply solution 331a supplied from the second negative electrode solution supply port 331 flows through the meandering second channel 334 between the positive and negative electrodes. At this time, the supply solution 331a for the second negative and positive electrodes flows through the channel 334 between the second negative and positive electrodes, and at the same time, a voltage is applied to the second positive electrode 324 and the second negative electrode 325 at both ends. When a voltage is applied, anion components (Cl ⁻ ions) are attracted to the second positive electrode 324 side, and positive ion components (Na ⁺ ions) are attracted to the second negative electrode 325 side, as well as Ca ²⁺ ions and Mg ²⁺ ions, etc.) are attracted, and electrolysis produces HCl and HClO on the second positive electrode 324 side and NaOH on the second negative electrode 325 side. Further, HClO and NaOH react to generate NaClO. By repeating this, hypochlorous acid water containing NaClO as the main component and containing HClO, NaOH, and residual NaCl is produced. In addition, since the supplied tap water solution contains Ca ²⁺ ions and Mg ²⁺ ions, Ca(OH) ₂ and Mg(OH) ₂ are also produced in addition to NaOH.

In the processing operation in the hypochlorous acid water generating unit 303a, the amount of electrolysis of NaCl is increased by increasing the time of electrolysis in the second channel 334 between the negative and positive electrodes, and the generated hypochlorous acid NaCl (salt water) remaining in acid water can be reduced. In order to lengthen the electrolysis time, it is necessary to lengthen the distance of the second channel 334 between the negative and positive electrodes. It is formed in a meandering manner, and the distance for electrolysis is earned by the number of horizontal reciprocations until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional area of the second cathode-positive electrode channel 334, the distance can be lengthened, and the electrolysis time can be lengthened.

Next, with reference to FIGS. 34 and 36, the processing operation of the hypochlorous acid water processing section 303b of the hypochlorous acid water generation unit 303 will be described. FIG. 36 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment section 303b of the hypochlorous acid water generation unit 303. As shown in FIG.

As shown in FIGS. 34 and 36, in the hypochlorous acid water treatment unit 303b of the hypochlorous acid water generation unit 303, hypochlorous acid produced by electrolyzing salt water in the hypochlorous acid water generation unit 303a is Water is continuously supplied to the second positive electrode side channel 335, and hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generating unit 303a is supplied to the second negative electrode side channel 336. continuously supplied to Then, the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generation unit 303a flows through the meandering second positive electrode-side channel 335, and similarly meanders. It flows through the formed second cathode side channel 336 . At this time, the hypochlorous acid water generated by electrolyzing the salt water in the hypochlorous acid water generation unit 303a is circulated in the same direction to form the second positive electrode side channel 335 and the second negative electrode side channel 336. , respectively, a voltage is applied to the second positive electrode 324 and the second negative electrode 325 at both ends. When a voltage is applied, anion components are attracted to the second positive electrode 324 side, and positive ion components (Na ⁺ ions, Ca ²⁺ ions and Mg ²⁺ ions, etc.) are attracted. Since the second diaphragm 326 is composed of a membrane that is permeable only to cationic components, the cationic components (Na ⁺ ions and , Ca ²⁺ ions and Mg ²⁺ ions contained in the tap water solution) permeate the second diaphragm 326, pass through the hypochlorous acid water in the second negative electrode side channel 336, and reach the second negative electrode 325 side. Cationic components are attracted. On the contrary, since the anion component flowing through the second negative electrode side channel 336 cannot permeate the second diaphragm 326, only the anion component contained in the second positive electrode side channel 335 reaches the second positive electrode 324. Attracted. By repeating this, the cation components contained in the hypochlorous acid water flowing through the second positive electrode-side channel 335 move to the hypochlorous acid water flowing through the second negative electrode-side channel 336. As the electrodialysis progresses, the hypochlorous acid water flowing through the second positive electrode-side channel 335 is separated and diluted with cation components, and the hypochlorous acid water flowing through the second negative electrode-side channel 336 is , the cationic components are concentrated and extracted. As a result, from the second positive electrode solution extraction port 332, as the second positive electrode extraction solution 332a, the components containing cations, which are the residual components, are separated and diluted, and hypochlorous acid water in which the HClO component is the main component is produced. extracted. On the contrary, from the second cathode solution extraction port 333, a solution (hypochlorous acid water) containing a component in which cations constituting residual components are separated and concentrated is extracted as a second cathode extraction solution 333a. .

In the processing operation in the hypochlorous acid water treatment unit 303b, the amount of movement of the cation components is can be increased to further reduce residual components consisting of Na ⁺ ions in the second positive electrode extraction solution 332a and cations such as Ca ²⁺ ions and Mg ²⁺ ions contained in the tap water solution. In order to lengthen the electrodialysis time, it is necessary to lengthen the distances of the second positive electrode side channel 335 and the second negative electrode side channel 336. It is formed in a meandering manner so that it rises one by one, and the distance for electrodialysis is earned by the number of horizontal reciprocations until the solution reaches from the bottom to the top. Furthermore, by reducing the cross-sectional areas of the second positive electrode side channel 335 and the second negative electrode side channel 336, the distance becomes longer, and the electrodialysis time can be lengthened.

The pumps are controlled so that the flow rates of the solutions passing through the second positive electrode side channel 335 and the second negative electrode side channel 336 are the same, but they may be different from each other. Different flow rates affect the concentration of each solution extracted. For example, when the flow velocity in the second positive electrode side channel 335 is relatively increased and the flow velocity in the second negative electrode side channel 336 is relatively decreased, the second positive electrode side channel 335 and the second The second cathode extraction solution 333a extracted from the second cathode-side channel 336 is smaller and has a higher concentration than when the two-cathode-side channel 336 has the same flow rate. Therefore, when the second cathode extraction solution 333a is drained, it is desirable to slow down the flow velocity of the second cathode-side channel 336. As shown in FIG.

Next, referring to FIG. 37, each solution (tap water, salt water, and The characteristics (conductivity, pH, and effective chlorine concentration) of chlorous acid water) will be described. FIG. 37 is an experimental image diagram for evaluating characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply device 301. FIG. It should be noted that the characteristic evaluation was carried out in the solutions (tap water, salt water, and each hypochlorous acid water).

In the experimental evaluation, the tap water stored in the tap water tank 340 was supplied to the tap water treatment unit 302 and circulated, the first negative electrode extraction solution 312a was collected in the salt water generation tank 321, and the first positive electrode extraction was performed. The solution 314a was collected in the drain side tank 323 . Subsequently, salt water obtained by adding a salt component to the first negative electrode extraction solution 312a recovered in the salt water generation tank 321 is supplied to the hypochlorous acid water generation unit 303 and circulated, and the second positive electrode extraction solution 332a is generated as follows. While recovering in the chlorous acid water tank 341, the second cathode extraction solution 333a was recovered in the drain side tank 323. At this time, the second negative electrode extraction solution 333a is mixed with the first positive electrode extraction solution 314a collected in the drain side tank 323. In the characteristic evaluation, the first positive electrode extraction solution 314a before mixing and the second cathode extraction solution 333a are also sampled.

The tap water treatment unit 302 was formed with a first negative electrode side channel 315 and a first positive electrode side channel 316 having a channel cross-sectional area of 8 mm ² and a channel length of 675 mm. In addition, the hypochlorous acid water generating part 303a of the hypochlorous acid water generating unit 303 is formed with a second cathode-positive electrode channel 334 having a channel cross-sectional area of 24 mm ² and a channel length of 360 mm. As the chlorous acid water treatment part 303b, one having a second positive electrode side channel 335 and a second negative electrode side channel 336 with a channel cross-sectional area of 24 mm ² and a channel length of 320 mm was used. The flow rate conditions of the first negative electrode side supply pump 318, the first positive electrode side supply pump 319, the second positive electrode side supply pump 338, and the second negative electrode side supply pump 339 are 11 mL/min and 0.5 mL/min, respectively. Flow rates of 0.9 mL/min, 4.4 mL/min, and 0.9 mL/min were applied. Then, the electrical conductivity, pH , and available chlorine concentration was measured. DC24V was applied to both the electrodialysis power supply 317 and the electrolysis/electrodialysis power supply 337 . The tap water (the first negative electrode supply solution 311a and the first positive electrode supply solution 313a) supplied to the tap water treatment unit 302 had a water volume of 1.1 L and a conductivity of 103 μS/cm in the experimental evaluation. , pH "7.0", and effective chlorine concentration "below detection limit". In the salt

water generation tank

321, 5 mL of concentrated salt water (salt water with a concentration of 0.5%) is supplied from the salt supply unit 322 and mixed with the first cathode extraction solution 312a recovered in the salt water generation tank 321 to produce hypochlorous acid. Salt water to be supplied to the acid water generation unit 303 was generated.

Fig. 38 summarizes the results of characterization of each solution. FIG. 38 is a diagram showing characteristics of the hypochlorous acid water that flows through the hypochlorous acid water supply device 301. FIG.

As shown in FIG. 38, the salt water obtained by adding the salt component to the first cathode extraction solution 312a collected in the salt water generation tank 321 has a water volume of "1.02 L", an electrical conductivity of "137 μS/cm", and a pH of "10. 2”, and the available chlorine concentration is “below the detection limit”, and the pH of the solution is alkaline. Moreover, since the salt component is supplied, the electrical conductivity is higher than that of the tap water supplied from the tap water tank 340 .

On the contrary, the first positive electrode extraction solution 314a (before mixing) collected in the drain side tank 323 has a water volume of “0.08 L”, an electrical conductivity of “1041 μS/cm”, a pH of “2.5”, and an available chlorine concentration of "137 ppm", indicating that the pH of the solution is acidic. The reason why the pH is acidic is that hypochlorous acid water is generated in the first positive electrode extraction solution 314a, and Cl ^{2 −} ions contained in the tap water are electrolyzed to become hypochlorous acid.

Next, the second positive electrode extraction solution 332a collected in the hypochlorous acid water tank 341 has a water volume of “0.85 L”, an electrical conductivity of “13 μS/cm”, a pH of “4.5”, and an effective chlorine concentration of “ 29 ppm", and the conductivity is low, that is, the hypochlorous acid water mainly composed of HClO with few residual ions. That is, in the hypochlorous acid water generation unit 303, acidic hypochlorous acid water is generated as the second positive electrode extraction solution 332a.

On the contrary, the second cathode extraction solution 333a (before mixing) collected in the drain side tank 323 has a water volume of “0.17 L”, an electrical conductivity of “1507 μS/cm”, a pH of “11.6”, and an available chlorine concentration of It is "8 ppm". That is, in the hypochlorous acid water generation unit 303, alkaline hypochlorous acid water is generated as the second cathode extraction solution 333a.

On the other hand, the extraction solution (after mixing) collected in the drainage side tank 323 and obtained by mixing the first positive electrode extraction solution 314a and the second negative electrode extraction solution 333a has a water volume of 0.25 L (=0.08 L + 0.17 L). , electrical conductivity of 538 μS/cm, pH of 10.4, and available chlorine concentration of 53 ppm. At this time, since the first positive electrode extracting solution 314a is acidic and the second negative electrode extracting solution 333a is alkaline, a neutralization reaction occurs, and the state approaches the neutral side. That is, the extraction solution (alkaline hypochlorous acid water) in such a state is discharged from the drain side tank 323 .

In addition, by setting the flow rate of the supply pumps (the first positive electrode side supply pump 319 and the second negative electrode side supply pump 339) connected to the drainage side tank 323 to be low, the amount of solution to be discharged can be reduced. there is

As described above, according to the hypochlorous acid water supply device 301 according to Embodiment 4-1, the following effects can be obtained.

(1) The hypochlorous acid water supply device 301 supplies tap water to the meandering first diaphragm electrolysis flow path (first negative electrode side flow path 315 and first positive electrode side flow path 316). a tap water treatment unit 302 that continuously separates and reduces anion components contained in tap water by energizing between a pair of first negative and positive electrodes (between the first negative electrode 304 and the first positive electrode 305); Salt water produced by adding a salt component to the tap water solution (first cathode extraction solution 312a) delivered from the tap water electrolysis channel (first cathode side channel 315) on the cathode side of the water treatment unit 302 to generate salt water. A generation unit 320, a meandering electrolysis flow channel configured to be able to supply the salt water (second positive electrode supply solution 331a) generated by the salt water generation unit 320, and a non-diaphragm electrolysis flow channel forming the front stage of the electrolysis flow channel. Hypochlorous acid water is generated by energizing between the pair of second negative and positive electrodes (between the second positive electrode 324 and the second negative electrode 325) from the salt water supplied inside (the channel 334 between the second negative and positive electrodes). A hypochlorous acid water generating part 303a that is continuously electrolytically generated, and a second membrane electrolysis flow path (second positive electrode side flow path 335 and second negative electrode side flow path 336) that constitutes the latter stage of the electrolysis flow path. Hypochlorous acid water supplied from the hypochlorous acid water generating unit 303a to each of the inside is continuously supplied between the pair of second negative and positive electrodes (between the second positive electrode 324 and the second negative electrode 325). and a hypochlorous acid water generation unit 303 having a hypochlorous acid water treatment unit 303b that effectively treats the hypochlorous acid water. A structure for supplying the hypochlorous acid water (second positive electrode extraction solution 332a) delivered from the electrolytic flow channel (second positive electrode side flow channel 335) on the positive electrode side of the hypochlorous acid water treatment unit 303b to the outside. and

According to such a configuration, salt water (second negative electrode supply solution 331a) generated from tap water solution (first negative electrode extraction solution 312a) in which the anion component is reduced while reducing the anion component contained in tap water. The hypochlorous acid water supply device 301 can supply hypochlorous acid water (second positive electrode extraction solution 332a) in which residual components generated by electrolysis are reduced. More specifically, in the hypochlorous acid water supply device 301, tap water is supplied to the tap water treatment unit 302, and the tap water electrolysis flow path (first cathode side flow path) on the negative electrode side of the tap water treatment unit 302 315) sent out from the tap water solution (first negative electrode extraction solution 312a) to which a salt component is added salt water (second negative electrode supply solution 331a) is supplied to the hypochlorous acid water generation unit 303. The chloric acid water generation unit 303 can generate hypochlorous acid water by electrolyzing salt water from which anion components have been separated and reduced. As a result, the generated hypochlorous acid water is suppressed in concentration variations and characteristic variations due to the anion component contained in the tap water. On the other hand, in the hypochlorous acid water generation unit 303, by supplying the salt water in which the anion component is separated and reduced to the electrolysis flow path, the non-diaphragm electrolysis flow path (second negative and positive electrode Hypochlorous acid water is generated by electrolyzing salt water in the intermediate flow path 334), and further, in the hypochlorous acid water treatment unit 303b, the second diaphragm electrolysis flow path (the second positive electrode side flow path 335 and the second Hypochlorous acid water generated in the non-diaphragm electrolysis flow channel is circulated in each of the two negative electrode side flow channels 336), and the cation component that causes the residual component from the positive electrode side is separated and reduced. It can be extracted as acid water (second positive electrode extraction solution 332a). As a result, when the hypochlorous acid soft water extracted from the positive electrode side is supplied to the outside, it is possible to suppress the occurrence of metal corrosion caused by residual components contained in the hypochlorous acid soft water.

On the other hand, when salt water is generated by adding a salt component without separating and reducing the anion component of tap water and circulating it to the hypochlorous acid water generation unit 303, the anion component of tap water is hypochlorous acid. It is mixed with the hypochlorous acid water and extracted from the electrolytic channel (second positive electrode side channel 335) on the positive electrode side of the acid water treatment unit 303b. In particular, chloride ions ( ^Cl- ions) in tap water are electrolyzed to produce hypochlorous acid water, which greatly affects the variation in concentration of hypochlorous acid water that is finally extracted, resulting in a stable concentration. of hypochlorous acid water is not generated. Therefore, the tap water treatment unit 302 needs to reduce the amount in advance. Anions other than chloride ions (Cl ⁻ ions) in tap water include ions such as SO ₄ ²⁻ and NO ₃ ⁻ , but when these are also circulated through the hypochlorous acid water generation unit 303, H It produces acids such as ₂ SO ₄ or HNO ₃ and causes property variations such as increased conductivity and decreased pH. For this reason, similarly, it is desirable to reduce the amount in the tap water treatment unit 302 in advance.

In addition, the second positive and negative electrodes (the second positive electrode 324 and the second negative electrode 325) are used in common for the hypochlorous acid water generation unit 303a and the hypochlorous acid water treatment unit 303b, The two diaphragm electrolysis channels are directly connected with a voltage applied between the second negative and positive electrodes. As a result, in the non-diaphragm electrolytic flow path, a large number of anions are present in the vicinity of the second positive electrode 324, and a large number of cations are present in the vicinity of the second negative electrode 325. Since it flows into the second diaphragm electrolysis flow path, the electrodialysis treatment can be started in a state in which the cations that cause residual components are reduced in advance on the second positive electrode 324 side.

Further, in the hypochlorous acid water supply device 301, the hypochlorous acid water generation unit 303 is supplied with salt water obtained by adding a salt component to tap water, so that the hypochlorous acid water generation unit 303a generates a non-diaphragm electrolytic flow. Hypochlorous acid water is generated by electrolyzing salt water in the passage, and hypochlorous acid water generated in the non-diaphragm electrolysis passage in the second diaphragm electrolysis passage in the hypochlorous acid water processing unit 303b. can be circulated and extracted as hypochlorous acid water in which cations that cause residual components are separated and reduced. At this time, not only Na ⁺ ions contained in salt components, but also cations such as Na ⁺ ions, Ca ²⁺ ions, and Mg ²⁺ ions, which are cationic components contained in tap water, can be separated and reduced at the same time. Therefore, the hypochlorous acid water supply device 301 can be configured to be capable of supplying the hypochlorous acid water from which residual components generated by the electrolysis of salt water are separated to the outside.

(2) In the hypochlorous acid water supply device 301, the first diaphragm electrolysis flow channel (the first negative electrode side flow channel 315 and the second positive electrode side flow channel 16) has the first negative electrode 304 in the flow channel. A meandering first cathode-side flow path 315 exposed and extending along the flow path is provided in parallel to face the first cathode-side flow path 315, and the first positive electrode 305 is exposed along the flow path. A meandering first positive electrode-side flow channel 316 extending as a serpentine channel, and the first negative electrode-side flow channel 315 and the first positive electrode-side flow channel 316 are separated from each other. and a first diaphragm 306 that is permeable to contained anions. A pair of first negative and positive electrodes (first negative electrode 304 and first positive electrode 305) exposes the first negative electrode 304 to the first negative electrode side channel 315 by the first negative electrode side spacer 307, and The first positive electrode 305 is exposed to the first positive electrode-side channel 316 by the positive electrode-side spacer 308 to form a meandering shape. Tap water is configured to flow in the same direction through the first negative electrode side channel 315 and the first positive electrode side channel 316 . According to such a configuration, the tap water treatment unit 302 circulates the tap water while applying a voltage in the same direction across the first diaphragm 306, so that the anion component contained in the tap water is continuously separated and reduced. can do. Therefore, the tap water solution (first negative electrode side flow channel 315) sent out from the tap water electrolysis channel (first negative electrode side channel 315) on the negative electrode side of the tap water treatment unit 302 is used as the tap water solution in which the anion component is separated and reduced. The electrode extraction solution 312 a ) can be stably supplied to the brine generation unit 320 .

(3) In the hypochlorous acid water supply device 301, the planar first cathode 304, the planar first diaphragm 306 facing the first cathode 304, the first cathode 304 and the first diaphragm 306 and a first cathode-side spacer 307 that exposes the first cathode 304 and the first diaphragm 306 in the first cathode-side channel 315 along the channel. The electrode-side channel 315 is composed of a first cathode 304 and a first diaphragm 306 exposed along the channel, and a first cathode-side spacer 307 . The hypochlorous acid water supply device 301 further includes a planar first positive electrode 305, a planar first diaphragm 306 facing the first positive electrode 305, and the first positive electrode 305 and the first diaphragm 306. a first positive electrode side spacer 308 provided between and exposing the first positive electrode 305 and the first diaphragm 306 in the first positive electrode side channel 316 along the channel; The electrode-side channel 316 is composed of a first positive electrode 305 and a first diaphragm 306 exposed along the channel, and a first positive electrode-side spacer 308 . According to such a configuration, the channel shape formed in the first cathode side spacer 307 and the channel shape formed in the first positive electrode side spacer 308 separate and reduce the anion component contained in the tap water. Since the capacity can be changed, it is possible to freely design the area and time for separating and reducing anionic components from tap water.

(4) In the hypochlorous acid water supply device 301, the non-diaphragm electrolytic flow path (the flow path 334 between the second negative and positive electrodes) includes a planar second positive electrode 324 and a planar and a spacer between negative and negative electrodes provided between the second positive electrode 324 and the second negative electrode 325 . A pair of second negative and negative electrodes (a second positive electrode 324 and a second negative electrode 325) are formed in a meandering shape by exposing the second positive electrode 324 and the second negative electrode 325 to the non-diaphragm electrolytic flow path by a spacer between negative and positive electrodes. is configured to According to this configuration, the ability to electrolyze salt water can be changed by the shape of the channel formed in the spacer between the positive and negative electrodes, so that the area and time for electrolyzing the salt water can be freely designed.

(5) In the hypochlorous acid water supply device 301, the second diaphragm electrolysis channel (the second positive electrode side channel 335 and the second negative electrode side channel 336) has the second positive electrode 324 in the channel. A meandering second positive electrode-side flow path 335 exposed and extending along the flow path is provided in parallel to face the second positive electrode-side flow path 335, and the second negative electrode 325 is exposed along the flow path. A meandering second negative electrode side channel 336 extending in the direction of a serpentine path is provided separating the second positive electrode side channel 335 and the second negative electrode side channel 336, and the solution flowing through the channel and a second diaphragm 326 that is permeable to contained cations. A pair of second negative and positive electrodes (a second positive electrode 324 and a second negative electrode 325) exposes the second positive electrode 324 to the second positive electrode side channel 335 by a second positive electrode side spacer 327, By exposing the second negative electrode 325 to the second negative electrode side channel 336 by the negative electrode side spacer 328, the second positive electrode side channel 335 and the second negative electrode side channel 336 are configured in a meandering manner. , the hypochlorous acid water supplied from the hypochlorous acid water generating unit 303a flow in the same direction. According to such a configuration, the hypochlorous acid water generated by electrolyzing the salt water is circulated while applying a voltage in the same direction across the second diaphragm 326, so the residual components from the hypochlorous acid water can be continuously separated and reduced. Therefore, as hypochlorous acid water with reduced residual components, hypochlorous acid is delivered from the electrolysis channel (second positive electrode side channel 335) on the positive electrode side of the hypochlorous acid water treatment unit 303b. Water (second positive electrode extraction solution 332a) can be stably supplied to the outside.

(6) In the hypochlorous acid water supply device 301, the planar second positive electrode 324, the planar second diaphragm 326 facing the second positive electrode 324, the second positive electrode 324 and the second diaphragm 326 and a second positive electrode-side spacer 327 that exposes the second positive electrode 324 and the second diaphragm 326 in the second positive electrode-side channel 335 along the channel; The electrode-side channel 335 is composed of a second positive electrode 324 and a second diaphragm 326 exposed along the channel, and a second positive electrode-side spacer 327 . A planar second cathode 325, a planar second diaphragm 326 facing the second cathode 325, and provided between the second cathode 325 and the second diaphragm 326. and a second cathode-side spacer 328 that exposes the second cathode 325 and the second diaphragm 326 in the second cathode-side channel 336, and the second cathode-side channel 336 extends along the channel. It is composed of an exposed second cathode 325 , a second diaphragm 326 , and a spacer 328 on the side of the second cathode. According to such a configuration, hypochlorous acid produced by electrolyzing salt water is generated by the flow channel shape formed in the second positive electrode side spacer 327 and the flow channel shape formed in the second negative electrode side spacer 328. Since the ability to separate cations that cause residual components from water can be changed, it is possible to freely design the area and time for separating and reducing the cation components that cause residual components from hypochlorous acid water. can be done.

(7) In the hypochlorous acid water supply device 301, the cathode-positive electrode spacer is configured by stacking a second anode-side spacer 327 and a second cathode-side spacer 328 on top of each other. According to such a configuration, the structure can be simplified, and the non-diaphragm electrolytic flow path (second anode-positive electrode inter-electrode flow path 334) and the second diaphragm electrolysis flow path (second positive electrode side flow path 335 and second negative electrode flow path 335) It is possible to suppress liquid leakage and disturbance of the ion distribution in the flow channel due to the boundary between the side flow channel 336) and flow.

(8) In the hypochlorous acid water supply device 301, it is provided at each inlet on the positive electrode side and the negative electrode side of the tap water treatment unit 302, and the first diaphragm electrolysis channel (first negative electrode side channel 315 and a first negative electrode side supply pump 318 and a first positive electrode side supply pump 319 that supply tap water to the first positive electrode side flow path 316), and the positive electrode side and negative electrode of the hypochlorous acid water generation unit 303 provided at each outlet on the side, and supplies salt water to the non-diaphragm electrolysis flow path (second cathode-positive electrode flow path 334) and the second diaphragm electrolysis flow path (second positive electrode-side flow path 335 and second A second positive electrode side supply pump 338 and a second negative electrode side supply pump 339 for supplying the hypochlorous acid water electrolytically generated in the negative electrode side channel 336) are provided. The first negative electrode side supply pump 318 and the first positive electrode side supply pump 319 supply tap water to the first negative electrode side channel 315 and the first positive electrode side channel 316 at a constant flow rate, respectively. A second positive electrode-side supply pump 338 and a second negative electrode-side supply pump 339 supply the hypochlorous acid water electrolytically generated in the hypochlorous acid water generation unit 303a to the second positive electrode-side channel 335 and the second negative electrode. They were supplied to the side channels 336 at a constant flow rate. As a result, in the first diaphragm electrolysis flow path, the time during which the voltage is applied in the first negative electrode side flow path 315 can be made constant, and in the first positive electrode side flow path 316, The time during which the voltage is applied can be made constant. Therefore, the concentration at which the anion component contained in the tap water in the first negative electrode side channel 315 is separated and diluted, and the concentration at which the anion component contained in the tap water in the first positive electrode side channel 316 is concentrated. can be stabilized. On the other hand, in the second diaphragm electrolysis flow path, the time during which the voltage is applied in the second positive electrode side flow path 335 can be made constant, and the voltage is applied in the second negative electrode side flow path 336. can be made constant. For this reason, the concentration at which the cation component that causes the residual component in the hypochlorous acid water in the second positive electrode side channel 335 is separated and diluted, and the hypochlorous acid water in the second negative electrode side channel 336 It is possible to stabilize the concentration of the cationic component, which is a factor of the residual component in the.

(9) In the hypochlorous acid water supply device 301, tap water solution (first positive electrode extraction A drain side tank 323 for storing the solution 314a) is provided. The drain-side tank 323 is mixed with the solution (second cathode extraction solution 333a) delivered from the electrolysis channel (second cathode-side channel 336) on the cathode side of the hypochlorous acid water generation unit 303. connected as follows. According to such a configuration, the tap water aqueous solution (first positive electrode extraction solution 314a) with an acidic pH delivered from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit 302 and the hypochlorous acid water generation unit 303 Neutralization is carried out by mixing with hypochlorous acid water (second cathode extraction solution 333a) having an alkaline pH sent from the electrolytic flow path (second cathode side flow path 336) on the cathode side of the , the pH of the mixed solution is alkaline, but the pH is more neutral than the pH of the alkaline solution sent from the electrolytic channel (second negative electrode side channel 336) on the negative electrode side of the hypochlorous acid water generation unit 303. can be drained while being close to the

(Embodiment 4-2)
A spatial sterilization system 350 using a hypochlorous acid water supply device 301 according to Embodiment 4-2 of the present disclosure will be described with reference to FIGS. 27 and 39. FIG. FIG. 39 is a schematic diagram of a space sterilization system 350 using a hypochlorous acid water supply device 301 according to Embodiment 4-2 of the present disclosure. A spatial sterilization system 350 according to Embodiment 4-2 described below is a system incorporating the hypochlorous acid water supply device 301 according to Embodiment 4-1. In the description of Embodiment 4-2, substantially the same configurations as those of the hypochlorous acid water supply device 301 according to Embodiment 4-1 are given the same reference numerals, and the description is partially simplified. or may be omitted.

The space sterilization system 350 according to Embodiment 4-2 sprays hypochlorous acid water generated from the hypochlorous acid water supply device 301 from the mist spray device 354 in the bathroom space and at the drain port 356. It is a system that sterilizes and cleans the bathroom space by flushing. The bathroom space corresponds to the "predetermined space" in the claims.

Specifically, as shown in FIG. 39, the spatial sterilization system 350 includes a hypochlorous acid water supply device 301 (tap water treatment unit 302, hypochlorous acid water generation unit 303, first cathode side supply pump 318, first positive electrode side supply pump 319, brine generation tank 321, salt supply part 322, drainage side tank 323, second positive electrode side supply pump 338, second negative electrode side supply pump 339), and positive electrode side extraction A solution tank 351 , a negative electrode side extraction solution tank 352 , a positive electrode side extraction solution bathroom piping 353 , a mist spray device 354 , a negative electrode side extraction solution bathroom piping 355 , and a drain port 356 are provided.

A tap water treatment unit 302 constituting the hypochlorous acid water supply device 301 supplies tap water and electrodialyzes the anion components (Cl ⁻ ions, SO ₄ ²⁻ ions, and NO _{3 )} contained in the tap water. ^- ions) are separated and diluted and extracted to the brine generation tank 321 . In the salt water generation tank 321, salt components are added from the salt supply unit 322, mixed, and supplied to the hypochlorous acid water generation unit 303 as salt water. Tap water is supplied to the tap water treatment unit 302 by a first negative electrode side supply pump 318 and a first positive electrode side supply pump 319 . A solution (first positive electrode extraction solution 314 a ) obtained by separating and condensing anion components contained in tap water by electrodialysis is extracted to the drain side tank 323 .

The hypochlorous acid water generation unit 303 supplies the salt water generated in the salt water generation tank 321, performs electrolysis in the former stage to generate hypochlorous acid water, and further electrodialyzes in the latter stage to generate residual Hypochlorous acid water in which the cationic components are separated and diluted is extracted from the second positive electrode solution extraction port 332 . The extracted second positive electrode extraction solution 332 a is hypochlorous acid water containing mainly HClO with high sterilizing power, and is sent to the positive electrode side extraction solution tank 351 . Further, the extracted solution is sent to the mist spraying device 354 through the positive electrode side extraction solution bathroom pipe 353 and sprayed into the bathroom space.

In addition, the hypochlorous acid water in which the cation component, which is the residual component, is separated and concentrated is extracted from the second negative electrode solution extraction port 333, supplied to the drain side tank 323, and extracted by the tap water treatment unit 302. It is mixed with the first positive electrode extraction solution 314a and discharged. This discharged liquid is hypochlorous acid water containing mainly NaClO and alkaline components, which has high detergency, and is sent to the negative electrode side extraction solution tank 352 via the drainage side tank 323 . Further, it is sent to the drain port 356 through the cathode-side extraction solution bathroom pipe 355 and flows into the drain pipe via the drain port 356 .

The positive electrode side extraction solution tank 351 sends the second positive electrode extraction solution 332a, which is hypochlorous acid water containing mainly HClO with high sterilizing power extracted from the second positive electrode side channel 335, to the mist spray device 354. It is a temporary storage tank until it is liquefied. The positive electrode side extraction solution tank 351 is connected to a mist spraying device 354 via a positive electrode side extraction solution bathroom piping 353 .

The cathode-side extraction solution tank 352 contains NaClO with high detergency extracted from the drain-side tank 323 in which the first positive electrode-side channel 316 and the second negative electrode-side channel 336 are mixed, and hypochlorous acid containing mainly alkaline components. It is a tank that temporarily stores water until it is sent to the drain port 356 . The cathode-side extraction solution tank 352 is connected to a drain port 356 via a cathode-side extraction solution bathroom pipe 355 .

The positive electrode side extraction solution bathroom pipe 353 is a pipe for sending liquid from the positive electrode side extraction solution tank 351 to the mist spray device 354 . The positive electrode-side extraction solution bathroom pipe 353 is installed behind the wall and ceiling of the bathroom, and is connected to a mist spraying device 354 installed on the ceiling.

The cathode-side extraction solution bathroom pipe 355 is a pipe for sending liquid from the cathode-side extraction solution tank 352 to the drain port 356 . The cathode-side extraction solution bathroom pipe 355 is installed behind the wall and floor of the bathroom and connected to a drain port 356 .

The mist spraying device 354 is a device that sprays hypochlorous acid water in the form of mist into the bathroom space. More specifically, the mist spraying device 354 finely sprays the second positive electrode extraction solution 332a, which is hypochlorous acid water, conveyed from the positive electrode side extraction solution tank 351 through the positive electrode side extraction solution bathroom piping 353. It is a device that emits a fine mist. The mist spraying device 354 is installed so that the spraying part protrudes from the ceiling to the bathroom side so that the mist can be sprayed from the ceiling of the bathroom space to the entire bathroom space. The mist spraying method includes a two-fluid spraying method that uses compressed air to atomize the mist, an ultrasonic method that uses an ultrasonic element to atomize a fine mist of 10 μm or less, or a solution that is released from a rotating body and crushed. and a crushing spray method in which a fine mist of 1 μm or less is sprayed. The mist spraying device 354 corresponds to the "sterilization device" in the claims.

The drain port 356 is a connection port for connecting with a drain pipe for discharging water or dirt generated in the bathroom space to the outside of the bathroom space. A mixture of the first positive electrode extraction solution 314a and the second negative electrode extraction solution 333a is conveyed from the negative electrode side extraction solution tank 352 through the negative electrode side extraction solution bathroom piping 355 to the drain port 356, and the cleaning power is improved. The drain port 356 and the drain pipe connected to the drain port 356 can be cleaned of contamination by the high NaClO and the hypochlorous acid water containing mainly alkaline components. The drain port 356 can be read as a "drain pipe" in the claims.

As described above, according to the spatial sterilization system 350 using the hypochlorous acid water supply device 301 according to Embodiment 4-2, the following effects can be obtained.

(10) The spatial sterilization system 350 includes the above-described hypochlorous acid water supply device 301 and, as the outside, an electrolysis flow path (second positive electrode side flow path 335 ), and a mist spraying device 354 that discharges hypochlorous acid water mist to a predetermined space using hypochlorous acid water sent from. According to such a configuration, the hypochlorous acid water mist sent from the electrolysis flow path (second positive electrode side flow path 335) on the positive electrode side of the hypochlorous acid water treatment unit 303b is dispensed into a predetermined space (bathroom space). ), the residual components remaining in the predetermined space are suppressed. In other words, the hypochlorous acid water sent from the electrolysis channel (second positive electrode side channel 335) on the positive electrode side of the hypochlorous acid water treatment unit 303b contains the residual components generated by the electrolysis of salt water and the water supply. Since it is hypochlorous acid water with reduced residual components due to cationic components contained in water, when sterilizing a predetermined space, the occurrence of metal corrosion caused by residual components is prevented while maintaining sterilization performance. can be suppressed.

(11) Spatial sterilization system 350 is provided with a drain port 356 in a predetermined space for discharging water generated in the predetermined space. The tap water solution sent from the tap water electrolysis channel in the hypochlorous acid water treatment unit 303b and the hypochlorous acid water sent from the electrolysis channel (second cathode side channel 336) on the cathode side of the hypochlorous acid water treatment unit 303b ( It is configured to be mixed with the second cathode extraction solution 333a) and introduced. According to this configuration, the hypochlorous acid water (second cathode extraction solution 333a) delivered from the electrolysis flow path (second cathode side flow path 336) on the cathode side of the hypochlorous acid water treatment unit 303b. is neutralized to some extent by the acidic tap water solution (first positive electrode extraction solution 314a) delivered from the tap water electrolysis channel (first positive electrode side channel 316) on the positive electrode side of the tap water treatment unit 302. However, it can be introduced into the drain port 356 as highly cleansing hypochlorous acid water containing an alkaline solution in which cationic components that cause residual components are concentrated. Therefore, the inside of the drain pipe can be washed with the hypochlorous acid water introduced into the drain port 356 .

As described above, the present disclosure has been described based on the fourth embodiment, but the present disclosure is not limited to the above-described fourth embodiment, and various modifications and improvements are possible without departing from the scope of the present disclosure. One thing is easy to guess.

The hypochlorous acid water treatment apparatus according to the present disclosure is used in the bathroom while sterilizing mold and bacteria in the bathroom space by spraying the generated HClO-based hypochlorous acid water. It is a useful means that makes it possible to suppress corrosion of metals and the like.

1 Hypochlorous acid water treatment device 2 Positive electrode 3 Negative electrode 4 Diaphragm 5 Anode side spacer 6 Cathode side spacer 7a Anode side electrode packing 7b Cathode side electrode packing 8a Anode side tank housing side 8b Cathode side tank housing side 9 anode-side solution supply port 9a anode-side supply solution 10 anode-side solution extraction port 10a anode-side extraction solution 11 cathode-side solution supply port 11a cathode-side supply solution 12 cathode-side solution extraction port 12a cathode-side extraction solution 13 anode flow path 13a anode Channel hole 14 Cathode channel 14a Cathode channel hole 15 Electrodialysis power supply 20 Spatial sterilization system 21 Hypochlorous acid water generator 22 Anode side supply pump 23 Cathode side supply pump 24 Anode side extraction solution tank 25 Cathode side extraction solution Tank 26 Anode side extraction solution bathroom piping 27 Mist spray device 28 Cathode side extraction solution bathroom piping 29 Drain port 101 Hypochlorous acid water supply device 102 Hypochlorous acid water generation unit 103 Hypochlorous acid water treatment unit 104 First positive Electrode 105 First negative electrode 106 Spacer between first negative and positive electrodes 107a First positive electrode packing 107b First negative electrode packing 108a First positive electrode side tank housing side 108b First negative electrode side tank housing side 109 First Anode electrode solution supply port 109a First cathode supply solution 110 First positive electrode solution extraction port 110a First positive electrode extraction solution 111 First negative electrode solution extraction port 111a First negative electrode extraction solution 112 Channel between first negative and positive electrodes 112a channel hole between first negative and positive electrodes 113 electrolysis power supply 114 second positive electrode 115 second negative electrode 116 diaphragm 117 second positive electrode side spacer 118 second negative electrode side spacer 119a second positive electrode packing 119b second negative electrode Electrode packing 120a Second positive electrode-side tank housing side surface 120b Second negative electrode-side tank housing side surface 121 Second positive electrode solution supply port 121a Second positive electrode supply solution 122 Second positive electrode solution extraction port 122a Second positive electrode Electrode extraction solution 123 Second negative electrode solution supply port 123a Second negative electrode supply solution 124 Second negative electrode solution extraction port 124a Second negative electrode extraction solution 125 Second positive electrode side channel 125a Second positive electrode side channel hole 126 second negative electrode side channel 126a second negative electrode side channel hole 127 electrodialysis power source 128 positive electrode side connection tube 129 positive electrode side supply pump 130 negative electrode side connection tube 131 negative electrode side supply pump 140 space sterilization system 141 positive electrode side extraction solution tank 142 negative electrode side extraction solution tank 143 positive electrode side extraction solution bathroom pipe 144 mist spray device 145 negative electrode side extraction solution bathroom pipe 146 drain port 201 hypochlorous acid water supply device 201a hypochlorous acid Water generator 201b Hypochlorous acid water treatment unit 202 Positive electrode 203 Negative electrode 204 Diaphragm 205 Positive electrode side spacer 206 Negative electrode side spacer 207a Positive electrode packing 207b Negative electrode packing 208a Positive electrode side tank housing side 208b Negative electrode side tank housing side surface 209 negative electrode solution supply port 209a negative electrode supply solution 210 positive electrode solution extraction port 210a positive electrode extraction solution 211 negative electrode solution extraction port 211a negative electrode extraction solution 212 channel between negative and positive electrodes 213 positive electrode side channel 213a Positive electrode side channel hole 214 Negative electrode side channel 214a Cathode electrode side channel hole 215 Electrolysis/electrodialysis power supply 220 Hypochlorous acid water supply device 220a Hypochlorous acid water generator 220b Hypochlorous acid water treatment Part 221 Electrode plate 222 Comb tooth positive electrode 223 Comb tooth negative electrode 230 Spatial sterilization system 231 Positive electrode side supply pump 232 Negative electrode side supply pump 233 Positive electrode side extraction solution tank 234 Negative electrode side extraction solution tank 235 Positive electrode side extraction Solution bathroom piping 236 Mist spray device 237 Cathode side extraction solution bathroom piping 238 Drain port 301 Hypochlorous acid water supply device 302 Tap water treatment unit 303 Hypochlorous acid water generation unit 303a Hypochlorous acid water generation unit 303b Hypochlorous acid water Chloric acid water treatment part 304 First negative electrode 305 First positive electrode 306 First diaphragm 307 First negative electrode side spacer 308 First positive electrode side spacer 309a First negative electrode packing 309b First positive electrode packing 310a First Cathode-side chamber side surface 310b First anode-side chamber side surface 311 First cathode solution supply port 311a First cathode supply solution 312 First cathode solution extraction port 312a First cathode extraction solution 313 First Positive electrode solution supply port 313a First positive electrode supply solution 314 First positive electrode solution extraction port 314a First positive electrode extraction solution 315 First negative electrode side channel 315a First negative electrode side channel hole 316 First positive electrode side Channel 316a First positive electrode side channel hole 317 Electrodialysis power supply 318 First negative electrode side supply pump 319 First positive electrode side supply pump 320 Salt water generation unit 321 Salt water generation tank 322 Salt supply part 323 Drainage side tank 324 Second Positive electrode 325 Second negative electrode 326 Second diaphragm 327 Second positive electrode side spacer 328 Second negative electrode side spacer 329a Second positive electrode packing 329b Second negative electrode packing 330a Second positive electrode side tank casing side 330b Side of second negative electrode tank housing 331 Second negative electrode solution supply port 331a Second negative electrode supply solution 332 Second positive electrode solution extraction port 332a Second positive electrode extraction solution 333 Second negative electrode solution extraction port 333a Second Cathode extraction solution 334 Second cathode-positive electrode channel 335 Second positive electrode side channel 335a Second positive electrode side channel hole 336 Second negative electrode side channel 336a Second negative electrode side channel hole 337 Electrolysis/ Electrodialysis power supply 338 Second positive electrode side supply pump 339 Second negative electrode side supply pump 340 Tap water tank 341 Hypochlorous acid water tank 350 Spatial sterilization system 351 Positive electrode side extraction solution tank 352 Negative electrode side extraction solution tank 353 Bathroom piping for positive electrode side extraction solution 354 Mist spray device 355 Bathroom piping for negative electrode side extraction solution 356 Drain port

Claims

a first channel in which the positive electrode is exposed and extended along the channel;
a second flow channel arranged in parallel to face the first flow channel and having a negative electrode extending and exposed along the flow channel;
a diaphragm provided to separate the first flow channel and the second flow channel and allowing cations contained in a solution flowing through the flow channel to permeate;
a power source that applies a voltage between the positive electrode and the negative electrode;
The first channel and the second channel are configured so that the first solution flowing through the first channel and the second solution flowing through the second channel both flow in the same direction,
At least the first solution is hypochlorous acid water produced by electrolyzing salt water,
Hypochlorous acid water treatment equipment.
The planar positive electrode, the planar diaphragm facing the positive electrode, and the positive electrode and the planar diaphragm provided between the positive electrode and the diaphragm, along the flow path and in the first flow path. a first spacer member exposing the diaphragm;
the planar negative electrode, the planar diaphragm facing the negative electrode, and the negative electrode provided between the negative electrode and the diaphragm along the flow path and in the second flow path. and a second spacer member that exposes the diaphragm,
The first channel is composed of the positive electrode and the diaphragm exposed along the channel, and the first spacer member,
The second channel is composed of the cathode and the diaphragm exposed along the channel, and the second spacer member,
The hypochlorous acid water treatment apparatus according to claim 1.
Both the first channel and the second channel are formed in a meandering shape,
The hypochlorous acid water treatment apparatus according to claim 1 or 2.
Both the first solution and the second solution are hypochlorous acid water produced by electrolyzing salt water,
The hypochlorous acid water treatment device according to any one of claims 1 to 3.
further comprising a supply pump that supplies the first solution to the first channel and supplies the second solution to the second channel;
The supply pump supplies the first solution and the second solution at a constant flow rate,
The hypochlorous acid water treatment device according to any one of claims 1 to 4.
The positive electrode and the negative electrode are both made of an electrode material containing platinum,
The hypochlorous acid water treatment apparatus according to any one of claims 1 to 5.
The hypochlorous acid water treatment device according to any one of claims 1 to 6,
a sterilization device that communicates with the first flow path and releases hypochlorous acid water mist into a predetermined space using the first solution;
Spatial sterilization system.
The predetermined space is provided with a drain pipe for discharging water generated in the predetermined space,
The second channel is connected to the drain pipe, and is configured to be able to introduce the second solution into the drain pipe,
The spatial sterilization system according to claim 7.
a hypochlorous acid water generating unit for continuously electrolytically generating hypochlorous acid water by energizing between the pair of first negative and positive electrodes from salt water supplied in the meandering membrane-free electrolytic flow path;
The hypochlorous acid water supplied from the hypochlorous acid water generation unit to each of the meandering diaphragm electrolysis channels is continuously processed by energizing between the pair of second negative and positive electrodes. an acid water treatment unit;
supplying the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit to the outside;
Hypochlorous acid water supply device.
The non-diaphragm electrolytic flow path is provided between a planar first positive electrode, a planar first negative electrode facing the first positive electrode, and between the first positive electrode and the first negative electrode. and a spacer member;
The pair of first cathode and cathode electrodes are formed in a meandering shape by exposing the first anode and the first cathode to the non-diaphragm electrolytic flow path by the spacer member,
The hypochlorous acid water supply device according to claim 9.
The diaphragm-equipped electrolysis channel includes a meandering first channel in which a second positive electrode is exposed and extends along the channel, and is arranged in parallel so as to face the first channel. A meandering second flow path exposed and extending along the flow path, and a cation contained in a solution flowing through the flow path separated from the first flow path and the second flow path. and a permeable diaphragm,
The pair of second negative and positive electrodes exposes the second positive electrode to the first channel by the first spacer member, and exposes the second negative electrode to the second channel by the second spacer member. It is configured in a meandering shape by
The hypochlorous acid water supplied from the hypochlorous acid water generation unit is configured to flow in the same direction in the first flow path and the second flow path,
The hypochlorous acid water supply device according to claim 10.
The planar second positive electrode, the planar diaphragm facing the second positive electrode, and the planar diaphragm provided between the second positive electrode and the diaphragm, along the flow path and in the first flow path the first spacer member exposing the second positive electrode and the diaphragm to the
the planar second cathode, the planar diaphragm facing the second cathode, and the second cathode provided between the second cathode and the diaphragm, the second spacer member exposing the second cathode and the diaphragm inside,
The first channel is composed of the second positive electrode and the diaphragm exposed along the channel, and the first spacer member,
The second channel is composed of the second cathode and the diaphragm exposed along the channel, and the second spacer member,
The hypochlorous acid water supply device according to claim 11.
The hypochlorous acid from the hypochlorous acid water generation unit is provided in a flow path that communicates and connects the hypochlorous acid water generation unit and the hypochlorous acid water treatment unit, and the hypochlorous acid from the hypochlorous acid water generation unit is provided in the diaphragm electrolysis flow path. A feed pump is provided to supply water,
The supply pump supplies the hypochlorous acid water from the hypochlorous acid water generation unit to the first channel and the second channel at a constant flow rate,
The hypochlorous acid water supply device according to any one of claims 9 to 12.
The hypochlorous acid water supply device according to any one of claims 9 to 13,
a sterilization device that communicates with the first flow path and releases hypochlorous acid water mist into a predetermined space using the hypochlorous acid water sent from the first flow path;
Spatial sterilization system.
The predetermined space is provided with a drain pipe for discharging water generated in the predetermined space,
The second channel is connected to the drain pipe, and is configured so that the hypochlorous acid water sent out from the second channel can be introduced into the drain pipe.
The space disinfection system according to claim 14.
a meandering electrolytic flow path configured to supply salt water;
A hypochlorous acid water generating unit for continuously electrolytically generating hypochlorous acid water by energizing between a pair of cathode and anode electrodes from the salt water supplied in the non-diaphragm electrolysis flow path constituting the preceding stage of the electrolysis flow path. and,
The hypochlorous acid water supplied from the hypochlorous acid water generating unit to each of the diaphragm-equipped electrolysis flow paths constituting the subsequent stage of the electrolysis flow path is continuously supplied between the pair of cathode and anode electrodes. and a hypochlorous acid water treatment unit to treat,
supplying the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit to the outside;
Hypochlorous acid water supply device.
The non-diaphragm electrolytic flow path comprises a planar positive electrode, a planar negative electrode facing the positive electrode, and a spacer member provided between the positive electrode and the negative electrode. is,
The pair of negative and negative electrodes are formed in a meandering shape by exposing the positive electrode and the negative electrode to the non-diaphragm electrolytic flow path by the spacer member.
The hypochlorous acid water supply device according to claim 16.
The diaphragm-equipped electrolysis flow path includes a meandering first flow path in which the positive electrode is exposed and extends along the flow path, and the first flow path is arranged in parallel to face the first flow path. A serpentine second channel exposed and extending along the channel, and a second channel provided separating the first channel and the second channel, and allowing cations contained in the solution flowing through the channel to pass through. a diaphragm, and
The pair of negative and positive electrodes are formed in a meandering shape by exposing the positive electrode to the first channel by the first spacer member and exposing the negative electrode to the second channel by the second spacer member. has been
The hypochlorous acid water supply device according to claim 17.
The planar positive electrode, the planar diaphragm facing the positive electrode, and the positive electrode and the planar diaphragm provided between the positive electrode and the diaphragm along the flow path in the first flow path. the first spacer member exposing the diaphragm;
The planar cathode, the planar diaphragm facing the cathode, and the cathode and the diaphragm are provided between the cathode and the diaphragm, and the cathode and the diaphragm are provided in the second flow path along the flow path. Further comprising the second spacer member that exposes the diaphragm,
The first channel is composed of the positive electrode and the diaphragm exposed along the channel, and the first spacer member,
The second channel is composed of the negative electrode and the diaphragm exposed along the channel, and the second spacer member,
The hypochlorous acid water supply device according to claim 18.
The spacer member is configured by overlapping the first spacer member and the second spacer member,
The hypochlorous acid water supply device according to claim 19.
further comprising a supply pump that is provided at each outlet on the positive electrode side and the negative electrode side of the hypochlorous acid water treatment unit and generates a flow that supplies the salt water to the electrolytic flow path,
The supply pump supplies the hypochlorous acid water from the hypochlorous acid water generating unit to the first channel and the second channel at a constant flow rate,
The hypochlorous acid water supply device according to any one of claims 16 to 19.
The hypochlorous acid water supply device according to any one of claims 18 to 21,
a sterilization device that communicates with the first flow path and releases hypochlorous acid water mist into a predetermined space using the hypochlorous acid water sent from the first flow path;
Spatial sterilization system.
The predetermined space is provided with a drain pipe for discharging water generated in the predetermined space,
The second channel is connected to the drain pipe, and is configured so that the hypochlorous acid water sent out from the second channel can be introduced into the drain pipe.
The space disinfection system according to claim 22.
a tap water treatment unit that continuously separates anion components contained in the tap water from the tap water supplied in the meandering first diaphragm electrolysis flow path by energizing between the pair of first cathode and cathode electrodes;
a salt water generation unit for generating salt water by adding a salt component to the tap water solution sent from the tap water electrolysis channel on the negative electrode side of the tap water treatment unit;
A meandering electrolysis flow path configured to be able to supply the salt water generated by the salt water generation unit, and a pair of second electrolysis flow paths from the salt water supplied to the non-membrane electrolysis flow path constituting the preceding stage of the electrolysis flow path. The hypochlorous acid water generating part for continuously electrolytically generating hypochlorous acid water by energization between the negative and positive electrodes, and the second electrolysis flow path with a diaphragm that constitutes the latter stage of the electrolysis flow path. a hypochlorous acid water treatment unit for continuously treating the hypochlorous acid water supplied from the chlorous acid water generation unit by energizing between the pair of second negative and positive electrodes. a unit and
supplying the hypochlorous acid water sent out from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit to the outside;
Hypochlorous acid water supply device.
The first diaphragm electrolysis flow channel has a meandering first cathode-side flow channel in which the first cathode is exposed and extends along the flow channel, and faces the first cathode-side flow channel. a meandering first positive electrode-side channel in which the first positive electrode is exposed and extended along the channel; the first negative electrode-side channel and the first positive electrode-side channel; a first diaphragm provided to separate the channel and permeating the anion component contained in the solution flowing through the channel,
The pair of first negative and positive electrodes exposes the first negative electrode to the first negative electrode side channel by the first negative electrode side spacer, and the first positive electrode side spacer is used to expose the first positive electrode side channel to the first positive electrode side channel. is configured in a meandering shape by exposing the first positive electrode to
The tap water is configured to flow in the same direction through the first negative electrode-side channel and the first positive electrode-side channel,
The hypochlorous acid water supply device according to claim 24.
The planar first cathode, the planar first diaphragm facing the first cathode, and the planar first diaphragm provided between the first cathode and the first diaphragm, the a first cathode-side spacer that exposes the first cathode and the first diaphragm in the first cathode-side channel;
The planar first positive electrode, the planar first diaphragm facing the first positive electrode, the planar first diaphragm provided between the first positive electrode and the first diaphragm, and the a first positive electrode-side spacer that exposes the first positive electrode and the first diaphragm in the first positive electrode-side channel;
The first cathode-side channel is composed of the first cathode and the first diaphragm exposed along the channel, and the first cathode-side spacer,
The first positive electrode side channel is composed of the first positive electrode and the first diaphragm exposed along the channel, and the first positive electrode side spacer,
The hypochlorous acid water supply device according to claim 25.
The non-diaphragm electrolytic flow path is provided between a planar second positive electrode, a planar second negative electrode facing the second positive electrode, and between the second positive electrode and the second negative electrode. and a spacer between the positive and negative electrodes,
The pair of second negative and negative electrodes are formed in a meandering shape by exposing the second positive and negative electrodes to the non-diaphragm electrolytic flow path by the spacer between negative and positive electrodes.
The hypochlorous acid water supply device according to any one of claims 24 to 26.
The second electrolysis flow path with a diaphragm is opposed to a meandering second positive electrode side flow path in which the second positive electrode is exposed and extended along the flow path, and the second positive electrode side flow path. a serpentine second cathode-side flow path in which the second cathode extends along the flow path; the second positive electrode-side flow path and the second cathode; a second diaphragm that is separated from the side channel and allows the passage of cationic components contained in the solution flowing through the channel,
The pair of second negative and positive electrodes exposes the second positive electrode to the second positive electrode side channel by the second positive electrode side spacer, and the second negative electrode side spacer is used to expose the second negative electrode side channel to the second negative electrode side channel. is configured in a meandering shape by exposing the second cathode to
The hypochlorous acid water supplied from the hypochlorous acid water generating unit is configured to flow in the same direction through the second positive electrode side channel and the second negative electrode side channel. ing,
The hypochlorous acid water supply device according to claim 27.
The planar second positive electrode, the planar second diaphragm facing the second positive electrode, the planar second diaphragm provided between the second positive electrode and the second diaphragm, and the a second positive electrode-side spacer that exposes the second positive electrode and the second diaphragm in the second positive electrode-side channel;
The planar second negative electrode, the planar second diaphragm facing the second negative electrode, the planar second diaphragm provided between the second negative electrode and the second diaphragm, and the a second cathode-side spacer that exposes the second cathode and the second diaphragm in the second cathode-side channel;
The second positive electrode side channel is composed of the second positive electrode and the second diaphragm exposed along the channel, and the second positive electrode side spacer,
The second cathode-side channel is composed of the second cathode and the second diaphragm exposed along the channel, and the second cathode-side spacer.
The hypochlorous acid water supply device according to claim 28.
The cathode-positive electrode spacer is configured by overlapping the second anode-side spacer and the second cathode-side spacer,
The hypochlorous acid water supply device according to claim 28 or 29.
A first negative electrode side supply pump and a first positive electrode side supply pump provided at respective inlets of the positive electrode side and the negative electrode side of the tap water treatment unit for supplying the tap water to the first diaphragm electrolysis flow path, and a first positive electrode side supply. a pump;
Provided at the respective outlets on the positive electrode side and the negative electrode side of the hypochlorous acid water generation unit, the salt water is supplied to the non-diaphragm electrolysis flow channel, and the hypochlorous acid water is supplied to the second diaphragm electrolysis flow channel. a second positive electrode side supply pump and a second negative electrode side supply pump for supplying the hypochlorous acid water electrolytically generated in the chloric acid water generation unit;
The first negative electrode side supply pump and the first positive electrode side supply pump supply the tap water to the first negative electrode side channel and the first positive electrode side channel, respectively, at a constant flow rate,
The second positive electrode-side supply pump and the second negative electrode-side supply pump supply the hypochlorous acid water electrolytically generated in the hypochlorous acid water generation unit to the second positive electrode-side channel and the second supply at a constant flow rate to each of the cathode-side channels;
The hypochlorous acid water supply device according to any one of claims 28-30.
further comprising a drain-side tank for storing the tap water solution sent from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit,
The drain-side tank is connected so that the hypochlorous acid water sent from the electrolysis flow path on the cathode side of the hypochlorous acid water generation unit is mixed,
The hypochlorous acid water supply device according to any one of claims 24 to 31.
The hypochlorous acid water supply device according to any one of claims 24 to 32,
As the outside, a sterilization device that emits hypochlorous acid water mist into a predetermined space using hypochlorous acid water sent from the electrolytic flow path on the positive electrode side of the hypochlorous acid water treatment unit. have a
Spatial sterilization system.
The predetermined space is provided with a drain pipe for discharging water generated in the predetermined space,
The drain pipe is configured to supply an aqueous tap water solution from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit and from the electrolysis channel on the negative electrode side of the hypochlorous acid water treatment unit. It is configured to be mixed with hypochlorous acid water and introduced,
34. The space disinfection system according to claim 33.