JP2023118144A - Hypochlorous acid water supply device and space sterilization system using the same - Google Patents

Abstract

To provide a technique for supply of hypochlorous acid water in which, with anion components contained in tap water being reduced, residual components generated by electrolysis of salt water produced from the anion component-reduced tap water are reduced.SOLUTION: A hypochlorous acid water supply device (1) includes: a tap water treatment unit (2) which applies electrical current to tap water supplied to first diaphragm electrolysis flow channels (15, 16) to continuously separate anion components contained in the tap water; and a hypochlorous acid water production unit (3) having an electrolysis flow channel which is configured to be capable of supplying salt water obtained by adding a salt component to a tap water solution sent out of the tap water treatment unit (2), a hypochlorous acid water production unit (3a) which performs continuous electrolysis production of hypochlorous acid water from the salt water supplied to a diaphragm-free electrolysis flow channel (34) constituting a pre-stage of the electrolysis flow channel, and a hypochlorous acid water treatment unit (3b) which performs continuous treatment of electrical current application to the hypochlorous acid water produced in the hypochlorous acid water production unit (3a) in second diaphragm electrolysis flow channels (35, 36) constituting a post-stage of the electrolysis flow channel.SELECTED DRAWING: Figure 1

Description

The present invention provides a hypochlorous acid water supply device that supplies hypochlorous acid water with reduced NaClO and NaOH, which are residual components of hypochlorous acid water generated by electrolysis of salt water, and space sterilization using the same. It is about the system.

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 (For example, see Patent Document 1)

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 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 for generating 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 invention solves the above-mentioned conventional problems, and reduces the residual components generated by electrolysis of salt water generated from tap water with reduced anion components while reducing the anion components contained in tap water. It is an object of the present invention to provide a hypochlorous acid water supply device capable of supplying hypochlorous acid water and a space sterilization system using the same.

In order to achieve this object, the hypochlorous acid water supply device according to the present invention provides water supply by energizing between the pair of first cathode and cathode electrodes from the tap water supplied in the meandering first diaphragm electrolysis flow path. A tap water treatment unit that continuously separates anionic components contained in water, and salt water that generates salt water by adding salt components to the tap water solution sent from the tap water electrolysis channel on the negative electrode side of the tap water treatment unit. a generation 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. A hypochlorous acid water generator that continuously electrolytically generates hypochlorous acid water by energizing between the negative and positive electrodes, and a hypochlorous acid water in each of 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 acid water generation unit by energizing between the pair of second cathode and cathode electrodes, the hypochlorous acid water treatment unit The structure is such that the hypochlorous acid water sent out from the electrolytic flow channel on the positive electrode side is supplied to the outside.

In addition, the space sterilization system according to the present invention includes the above-described hypochlorous acid water supply device and, as an external component, 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 invention, 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 tap water. It is possible to provide a hypochlorous acid water supply device and a space sterilization system using the same.

FIG. 1 is a cross-sectional image diagram of a hypochlorous acid water supply apparatus according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram of a tap water treatment unit. FIG. 3 is an exploded perspective view of the tap water treatment unit. FIG. 4 is a vertical cross-sectional image diagram of the tap water treatment unit. FIG. 5 is a horizontal sectional image diagram of the tap water treatment unit. FIG. 6 is a schematic diagram of a hypochlorous acid water generating unit. FIG. 7 is an exploded perspective view of the hypochlorous acid water generating unit. FIG. 8 is a vertical cross-sectional image diagram of the hypochlorous acid water generating unit. FIG. 9 is a horizontal cross-sectional image diagram of the hypochlorous acid water generating part of the hypochlorous acid water generating unit. FIG. 10 is a horizontal sectional image diagram of the hypochlorous acid water treatment part of the hypochlorous acid water generation unit. FIG. 11 is an experimental image diagram for evaluating characteristics of hypochlorous acid water flowing through a hypochlorous acid water supply device. FIG. 12 is a diagram showing characteristics of hypochlorous acid water that flows through the hypochlorous acid water supply device. FIG. 13 is a schematic diagram of a spatial sterilization system using a hypochlorous acid water supply device according to Embodiment 2 of the present invention.

In the hypochlorous acid water supply apparatus according to the present invention, the anion component contained in the tap water supplied to the meandering first diaphragm electrolysis flow path is energized between the pair of first negative and positive electrodes by energizing the tap water. 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 unit that continuously treats the hypochlorous acid water by energizing between the pair of second negative and positive electrodes, the hypochlorous acid water The structure is such that the hypochlorous acid water sent out from the electrolytic flow path on the positive electrode side of the processing section 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 invention, the first diaphragm electrolysis flow path has a meandering first cathode side flow in which the first cathode is exposed and extended along the flow path. 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 apparatus according to the present invention, 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 apparatus according to the present invention, the non-diaphragm electrolysis flow channel includes a planar second positive electrode, a planar second negative electrode facing the second positive electrode, and a second planar negative electrode facing the 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 invention, 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 apparatus according to the present invention, 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 invention, the cathode-positive electrode spacer is formed by stacking 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.

In addition, in the hypochlorous acid water supply apparatus according to the present invention, the first separator is provided at each of the inlets on the positive electrode side and the negative electrode side of the tap water treatment unit, and supplies tap water to the first diaphragm electrolysis flow path. 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.

Also, the hypochlorous acid water supply apparatus according to the present invention is provided with a drain-side tank for storing 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 invention 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 space sterilization system according to the present invention, the predetermined space is provided with a drain pipe for discharging water generated in the predetermined space, and the drain pipe is located on the positive electrode side of the tap water treatment unit. 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.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following embodiment is an example that embodies the present invention, and does not limit the technical scope of the present invention. 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 1)
A hypochlorous acid water supply apparatus 1 according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional image diagram of a hypochlorous acid water supply device 1 according to Embodiment 1 of the present invention.

The hypochlorous acid water supply device 1 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 ⁺ contained in the tap water 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. 1, the hypochlorous acid water supply device 1 includes a tap water treatment unit 2, a hypochlorous acid water generation unit 3, a first cathode side supply pump 18, and a second It comprises a first positive electrode side supply pump 19 , a salt water generation unit 20 , a waste water side tank 23 , a second positive electrode side supply pump 38 and a second negative electrode side supply pump 39 .

<Tap water treatment unit>
The tap water treatment unit 2 will be described with reference to FIGS. 1 to 4. FIG. FIG. 2 is a schematic diagram of the tap water treatment unit 2. As shown in FIG. FIG. 3 is an exploded perspective view of the tap water treatment unit 2. FIG. FIG. 4 is a vertical cross-sectional image diagram of the tap water treatment unit 2. As shown in FIG.

The tap water treatment unit 2 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 2 includes a first negative electrode 4, a first positive electrode 5, a first diaphragm 6, a first negative electrode side spacer 7, a first positive electrode side spacer 8, and a first negative electrode A packing 9a, a first positive electrode packing 9b, a first negative electrode-side tank housing side surface 10a, a first positive electrode-side tank housing side surface 10b, a first negative electrode solution supply port 11, and a first negative electrode. Electrode solution extraction port 12, first positive electrode solution supply port 13, first positive electrode solution extraction port 14, first negative electrode side channel 15, first positive electrode side channel 16, electrodialysis power supply 17 and.

The first cathode 4 is a planar electrode plate. The surface of the electrode plate of the first cathode 4 is exposed along the channel of the first cathode side channel 15 by the first cathode side spacer 7 . The first cathode electrode 4 is the electrode that functions as a cathode when current is passed by the electrodialysis power supply 17 . The first negative electrode 4 is arranged substantially parallel to and facing the first positive electrode 5 . The first cathode 4 forms a platinum-containing catalyst on the surface of the titanium substrate. A platinum-containing catalyst is formed at least on the surface of the first cathode 4 exposed along the first cathode-side flow path 15 .

The first positive electrode 5 is a planar electrode plate. The surface of the electrode plate of the first positive electrode 5 is exposed along the channel of the first positive electrode-side channel 16 by the first positive electrode-side spacer 8 . The first positive electrode 5 is an electrode that functions as an anode when current is passed by the electrodialysis power supply 17 . The first positive electrode 5 is arranged substantially parallel to and facing the first negative electrode 4 . The first positive electrode 5 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 5 exposed along the channel 16 on the first positive electrode side.

In addition, the first negative electrode 4 and the first positive electrode 5 in the region where electrodialysis is performed by exposing them along the first negative electrode side channel 15 and the first positive electrode side channel 16 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 4 and the first positive electrode 5 constitute negative and positive electrodes (hereinafter also referred to as first negative and positive electrodes) as a pair of opposing electrodes.

The first diaphragm 6 is a planar thin film. The first diaphragm 6 is arranged substantially parallel to and facing the first negative electrode 4 and the first positive electrode 5 . The first diaphragm 6 is provided so as to separate the first negative electrode side channel 15 and the first positive electrode side channel 16 . The first diaphragm 6 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 6 can move anions to the first positive electrode 5 side by applying a voltage to the first negative electrode 4 and the first positive electrode 5 . As this anion exchange membrane, for example, Neocepta manufactured by Astom Co., Ltd. can be used.

The first cathode side spacer 7 is an insulating member. The first cathode side spacer 7 controls the distance between the first cathode 4 and the first diaphragm 6 to a predetermined distance. The first cathode side spacer 7 has a first cathode side channel hole 15 a forming a first cathode side channel 15 inside the first cathode side spacer 7 . The first cathode side channel hole 15 a is a hole that forms the first cathode side channel 15 formed in the first cathode side spacer 7 . The first cathode-side channel hole 15a is formed through the front and back of the first cathode-side spacer 7, and is formed in a meandering manner so as to reciprocate in the horizontal direction and rise step by step. ing. Further, on the surface of the first cathode-side spacer 7, a meandering packing member (not shown), which is the same as the first cathode-side spacer 7, is provided on the surface of the first cathode-side spacer 7 in order to increase the adhesion between the first cathode 4 and the first diaphragm 6. ) is installed.

The first positive electrode side spacer 8 is an insulating member. The first positive electrode side spacer 8 controls the distance between the first positive electrode 5 and the first diaphragm 6 to a predetermined distance. The first positive electrode side spacer 8 has a first positive electrode side channel hole 16 a forming a first positive electrode side channel 16 inside the first positive electrode side spacer 8 . The first positive electrode side channel hole 16 a is a hole that forms the first positive electrode side channel 16 formed in the first positive electrode side spacer 8 . The first positive electrode side passage hole 16a is formed through the front and back of the first positive electrode side spacer 8, 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 15a and the first positive electrode side channel hole 16a are arranged so as to face each other. Also, on the surface of the first positive electrode side spacer 8, a meandering packing member (not shown), which is the same as the first positive electrode side spacer 8, is provided in order to increase the adhesion between the first positive electrode 5 and the first diaphragm 6. ) is installed.

The first cathode packing 9a has a shape in which the outer circumference of the first cathode 4 is hollowed out to the size of the electrode, and is in close contact with the first cathode side spacer 7 so as to extend in the outer circumference direction. It is attached with tightening pressure so that the solution in 15 (the first cathode supply solution 11a to be described later) does not leak. Insulating silicon rubber can be used as the member of the first cathode packing 9a. The first cathode packing 9a is thicker than the first cathode 4, and is crushed by the tightening pressure so that the first cathode side spacer 7 and the first cathode side tank housing side face 10a are crushed. It is desirable that the thickness of the first cathode 4 is maintained while the electrodes are in close contact with each other.

The first positive electrode packing 9b has a shape in which the outer periphery of the first positive electrode 5 is hollowed out to the size of the electrode. It is attached with tightening pressure so that the solution in 16 (the first positive electrode supply solution 13a to be described later) does not leak. As a member of the first positive electrode packing 9b, insulating silicone rubber can be used. The first positive electrode packing 9b is thicker than the first positive electrode 5, and is crushed by being pressed by the tightening pressure, thereby connecting the first positive electrode side spacer 8 and the first positive electrode side tank housing side face 10b. It is desirable that the thickness of the first positive electrode 5 is maintained while the electrodes are in close contact with each other.

The first cathode side tank housing side surface 10a is arranged so as to be in direct contact with the outside of the first cathode 4 . The first cathode-side tank housing side surface 10a is provided with an inner surface of the first cathode-side tank housing side surface 10a in order to suppress penetration of the solution to the outside of the first cathode 4, 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 negative electrode 4, the efficiency of electrodialysis can be improved if the solution can be prevented from flowing to the outside of the electrode.

The first positive electrode side tank housing side surface 10b is arranged so as to be in direct contact with the outside of the first positive electrode 5 . The first positive electrode-side tank housing side surface 10b is provided with an inner surface of the first positive electrode-side tank housing side surface 10b in order to suppress penetration of the solution to the outside of the first positive electrode 5, 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 5, 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 11 is a connection port for flowing the first cathode 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 first cathode supply solution 11 a from the outside of the first cathode 4 , the first cathode solution supply port 11 is processed at a position outside the first cathode 4 .

The first cathode supply solution 11a 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 11 a is introduced from the first cathode solution supply port 11 into the first cathode side channel 15 .

The first cathode solution extraction port 12 is a connection port for extracting the electrodialyzed first cathode 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 first cathode extraction solution 12 a outside the first cathode 4 , the first cathode solution extraction port 12 is processed at a position outside the first cathode 4 .

The first negative electrode extraction solution 12a is an aqueous tap water solution in which the anionic components contained in the tap water are separated and reduced from the tap water, and the cationic components contained in the tap water remain in the tap aqueous solution without being separated and reduced. The first cathode extraction solution 12 a is introduced into the first cathode solution extraction port 12 from the first cathode side channel 15 .

More specifically, the first cathode extracting solution 12a is obtained by circulating the first cathode supply solution 11a through the first cathode-side channel 15 to obtain the concentration of hypochlorous acid water from the first cathode supply solution 11a. 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 13 is a connection port for flowing the first positive electrode supply solution 13a to be electrodialyzed into the channel, and is attached with a connector (not shown) to which a tube can be connected. In order to supply the first positive electrode supply solution 13 a from the outside of the first positive electrode 5 , the first positive electrode solution supply port 13 is processed at a position outside the first positive electrode 5 .

The first positive electrode supply solution 13a is tap water similar to the first negative electrode supply solution 11a. The first positive electrode supply solution 13 a is introduced from the first positive electrode solution supply port 13 into the first positive electrode side channel 16 .

The first positive electrode solution extracting port 14 is a connection port for extracting the electrodialyzed first positive electrode extracting solution 14a 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 14 a outside the first positive electrode 5 , the first positive electrode solution extracting port 14 is processed at a position outside the first positive electrode 5 .

The first positive electrode extraction solution 14a is a tap water solution obtained by separating and concentrating the anion component contained in tap water from tap water. The first positive electrode extraction solution 14 a is led out from the first positive electrode side channel 16 to the first positive electrode solution extraction port 14 .

More specifically, the first positive electrode extraction solution 14a is obtained by circulating the first positive electrode supply solution 13a through the first positive electrode side channel 16 so that the concentration of hypochlorous acid water from the first positive electrode supply solution 13a 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 ^{2 −} ions) contained in tap water, so the pH of this tap water solution is acidic.

Here, the first negative electrode solution supply port 11 and the first positive electrode solution supply port 13 are preferably arranged on the lower side in the vertical direction, and the first negative electrode solution extraction port 12 and the first positive electrode solution extraction It is desirable that the mouth 14 be arranged on the upper side in the vertical direction. 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 15 is a channel formed by the area surrounded by the first cathode 4 , the first cathode-side spacer 7 , and the first diaphragm 6 . The first cathode-side channel 15 is formed meandering by the first cathode-side channel hole 15 a of the first cathode-side spacer 7 . More specifically, the first cathode-side channel 15 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 15, the distance becomes longer, and the electrodialysis time can be lengthened. In order to reduce backflow of the liquid in the first cathode-side channel 15, it is desirable that the first cathode-side channel 15 has a structure in which the first cathode-side channel 15 runs in one direction from bottom to top except for reciprocation in the horizontal direction. The first cathode side channel 15 is provided with the first cathode solution supply port 11 on one side and the first cathode solution extraction port 12 on the other side. A cathode supply solution 11a is circulated.

The first positive electrode-side channel 16 is a channel formed in a region surrounded by the first positive electrode 5 , the first positive electrode-side spacer 8 , and the first diaphragm 6 . The first positive electrode side channel 16 is formed by meandering through the first positive electrode side channel hole 16 a of the first positive electrode side spacer 8 . More specifically, the first positive electrode-side channel 16 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 channel width of the first positive electrode side channel 16, 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 16, it is desirable that the first positive electrode-side channel 16 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 16 is provided with a first positive electrode solution supply port 13 on one side and a first positive electrode solution extraction port 14 on the other side. A positive electrode supply solution 13a is circulating.

The first negative electrode side channel 15 and the first positive electrode side channel 16 face each other in a symmetrical shape with the first diaphragm 6 interposed therebetween. In other words, the first negative electrode side channel 15 and the first positive electrode side channel 16 are configured in a meandering shape facing each other with the first diaphragm 6 interposed therebetween. In this manner, the first cathode-side flow channel 15 and the first positive electrode-side flow channel 16 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 15 moves to the first positive electrode side channel 16 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 18 in front of the first negative electrode solution supply port 11 and by installing a first positive electrode side supply pump 19 in front of the first positive electrode solution supply port 13. 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, so the concentration at which the anion component contained in the tap water in the first negative electrode side channel 15 is separated and diluted. , and the concentrated concentration of the anion component contained in the tap water in the first positive electrode-side channel 16 can be stabilized.

The electrodialysis power supply 17 is a direct-current power supply that energizes between the pair of first positive and negative electrodes. More specifically, the electrodialysis power supply 17 is a DC power supply connected to the first negative electrode 4 and the first positive electrode 5 and capable of applying current and voltage to the first negative electrode 4 and the first positive electrode 5. be. The electrodialysis power supply 17 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 18 is a pump that generates a flow that supplies the first cathode supply solution 11a. More specifically, the first cathode side supply pump 18 is installed upstream of the first cathode solution supply port 11 . Then, the first cathode side supply pump 18 causes each solution to flow through the first cathode solution supply port 11, the first cathode side channel 15, the first cathode solution extraction port 12, and the salt water generation tank 21 in this order. A flow of (tap water, first cathode supply solution 11a, first cathode extraction solution 12a) is initiated. At this time, the first cathode side supply pump 18 controls the flow rate of the solution flowing through the tap water treatment unit 2 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 19 is a pump that generates a flow that supplies the first positive electrode supply solution 13a. More specifically, the first positive electrode side supply pump 19 is installed upstream of the first positive electrode solution supply port 13 . The first positive electrode side supply pump 19 supplies each solution through the first positive electrode solution supply port 13, the first positive electrode side channel 16, the first positive electrode solution extraction port 14, and the drain side tank 23 in this order. A flow of (tap water, first positive electrode supply solution 13a, first positive electrode extraction solution 14a) is initiated. At this time, the first positive electrode side supply pump 19 controls the flow rate of the solution flowing through the tap water treatment unit 2 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 20 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 15) on the negative electrode side of the tap water treatment unit 2. . The salt water generation unit 20 includes a salt water generation tank 21 that stores the solution sent from the first negative electrode side channel 15 of the tap water treatment unit 2, and a salt supply section 22 that supplies salt components to the salt water generation tank 21. configured with

The salt water generation tank 21 temporarily stores the first cathode extraction solution 12a extracted from the first cathode solution extraction port 12 of the tap water treatment unit 2, and mixes it with the salt component supplied from the salt supply section 22. It is a container that mixes and produces salt water to be supplied to the hypochlorous acid water production unit 3. The tap water solution (first cathode extraction solution 12a) sent out from the first cathode-side channel 15 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 21 are less affected by the tap water, and the chloride ion concentration resulting from the salt component added by the salt supply unit 22 is reduced. controlled. In the hypochlorous acid water generation unit 3, chloride ions from the salt water generation unit 20 are electrolyzed to generate hypochlorous acid water. It becomes possible to control the concentration of acid water by the supply amount of the salt supply unit 22 .

The salt supply unit 22 is a member that supplies the salt water generation tank 21 with a salt component (for example, sodium chloride) required for a target concentration generated by the hypochlorous acid water generation unit 3 . 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 23 temporarily stores the first positive electrode extraction solution 14a extracted from the first positive electrode solution extraction port 14 of the tap water treatment unit 2, and the second It is a container for temporarily storing the second cathode extraction solution 33 a extracted from the cathode solution extraction port 33 . The drain-side tank 23 mixes the first positive electrode extraction solution 14a (tap water solution) and the second negative electrode extraction solution 33a (hypochlorous acid water), and stores the mixed solution (mixed hypochlorous acid water). It is constructed such that it can be discharged to the outside through a drain port provided on the side surface of the drain-side tank 23 . When mixing, the first positive electrode extraction solution 14a (tap water solution) with an acidic pH and the second negative electrode extraction solution 33a (hypochlorous acid water) with an alkaline pH are neutralized. , the mixed solution has an alkaline pH. That is, the drain-side tank 23 can drain the mixed solution in a state where the pH of the second cathode extraction solution 33a (hypochlorous acid water) is closer to the neutral side than the pH.

<Hypochlorous acid water generation unit>
The hypochlorous acid water generating unit 3 will be described with reference to FIGS. 1 and 6 to 8. FIG. FIG. 6 is a schematic diagram of the hypochlorous acid water generating unit 3. As shown in FIG. FIG. 7 is an exploded perspective view of the hypochlorous acid water generating unit 3. FIG. FIG. 8 is a vertical cross-sectional image diagram of the hypochlorous acid water generating unit 3 .

The hypochlorous acid water generation unit 3 generates hypochlorous acid water by electrolyzing the salt water supplied from the salt water generation unit 20, and further separates and reduces residual components contained in the hypochlorous acid water. is a unit of

The hypochlorous acid water generation unit 3 includes a hypochlorous acid water generation unit 3a, a hypochlorous acid water treatment unit 3b, an electrolysis/electrodialysis power source 37, a second positive electrode side supply pump 38, and a and a two-cathode-side supply pump 39 .

The hypochlorous acid water generator 3a is a member that electrolyzes salt water supplied from the salt water generation unit 20 to generate hypochlorous acid water in one pass. The hypochlorous acid water generator 3a includes a second positive electrode 24, a second negative electrode 25, a second positive electrode-side spacer 27, a second negative electrode-side spacer 28, and a second positive electrode packing 29a. , a second negative electrode packing 29b, a second positive electrode side tank housing side surface 30a, a second negative electrode side tank housing side surface 30b, a second negative electrode side electrode solution supply port 31, and a second positive electrode solution extraction. A port 32 , a second cathode solution extraction port 33 , and a channel 34 between second cathode and cathode electrodes are provided.

The hypochlorous acid water treatment unit 3b is a member that separates and reduces residual components contained in the hypochlorous acid water supplied from the hypochlorous acid water generation unit 3a in a single pass. The hypochlorous acid water treatment unit 3b includes a second positive electrode 24, a second negative electrode 25, a second diaphragm 26, a second positive electrode side spacer 27, a second negative electrode side spacer 28, a second A positive electrode packing 29a, a second negative electrode packing 29b, a second positive electrode side tank housing side surface 30a, a second negative electrode side tank housing side surface 30b, a second negative electrode solution supply port 31, A second positive electrode solution extraction port 32 , a second negative electrode solution extraction port 33 , a second positive electrode side channel 35 , and a second negative electrode side channel 36 are provided.

The second positive electrode 24 is a planar electrode plate. The surface of the electrode plate of the second positive electrode 24 is exposed along the channel 34 between the negative and positive electrodes and the channel 35 on the second positive electrode side by means of the spacer 27 on the side of the second positive electrode. The second positive electrode 24 is an electrode that functions as an anode when current is passed by the electrolysis/electrodialysis power source 37 . The second positive electrode 24 is arranged substantially parallel to and facing the second negative electrode 25 . The second positive electrode 24 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 on the surface of the second positive electrode 24 that is exposed along at least the channel 34 between the negative and positive electrodes and the channel 35 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 25 is a planar electrode plate. The surface of the electrode plate of the second negative electrode 25 is exposed along the channel 34 between the negative and positive electrodes and the channel 36 on the second negative electrode side by means of the spacer 28 on the side of the second negative electrode. The second cathode 25 is an electrode that functions as a cathode when current is passed by the electrolysis/electrodialysis power source 37 . The second negative electrode 25 is arranged substantially parallel to and facing the second positive electrode 24 . The second negative electrode 25 forms a platinum-containing catalyst on its surface, similar to the second positive electrode 24 . The platinum-containing catalyst is formed at least on the surface of the second negative electrode 25 exposed along the second channel between the negative and positive electrodes 34 and the channel 35 on the side of the positive electrode. In addition, the second positive electrode 24 and the second negative electrode 25 in the regions exposed along the second positive electrode-side channel 35 and the second negative electrode-side channel 36 and subjected to electrodialysis have the same shape, and the opposing 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 24 and the second negative electrode 25 constitute negative and positive electrodes (hereinafter also referred to as second negative and positive electrodes) as a pair of opposing electrodes.

The second diaphragm 26 is a planar thin film. The second diaphragm 26 is arranged substantially parallel to and facing the second positive electrode 24 and the second negative electrode 25 . The second diaphragm 26 is provided so as to separate the second positive electrode side channel 35 and the second negative electrode side channel 36 . The second diaphragm 26 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 26 can move cationic components to the second negative electrode 25 by applying a voltage to the second positive electrode 24 and the second negative electrode 25 . Examples of the cation exchange membrane include Nafion manufactured by DuPont. The second diaphragm 26 is arranged in the rear stage (the latter part) of the channel, and the part having the second diaphragm 26 becomes the hypochlorous acid water treatment part 3b. On the contrary, the part without the second diaphragm 26 in the front stage (first half part) of the flow path becomes the hypochlorous acid water generating part 3a. The size of the second diaphragm 26 determines the area of the hypochlorous acid water generating section 3a and the area of the hypochlorous acid water treating section 3b. Specifically, if you want to increase the ratio of electrolysis time of salt water, the size of the second diaphragm 26 is reduced, and if you want to increase the ratio of electrodialysis time of hypochlorous acid water, the second diaphragm Increase the size of 26. Since the cationic components are concentrated on the second negative electrode 25 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 generating unit 3, the potentials of the second positive electrode 24 and the second negative electrode 25 are reversed to dissolve the attached scale. . When it is assumed that the poles are reversed, the second positive electrode 24 and the second negative electrode 25 are desirably treated with a similar platinum-containing catalyst.

The second positive electrode side spacer 27 is an insulating member. The second positive electrode side spacer 27 controls the distance between the second positive electrode 24 and the second diaphragm 26 to a predetermined distance. The second positive electrode side spacer 27 has, inside the second positive electrode side spacer 27, a second positive electrode side channel hole 35a that forms a second positive electrode side channel 35, which will be described later. The second positive electrode side channel hole 35 a is a hole that forms the second positive electrode side channel 35 formed in the second positive electrode side spacer 27 . The second positive electrode side channel hole 35a is formed through the front and back of the second positive electrode side spacer 27, 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 27, a meandering packing member (not shown), which is the same as the second positive electrode side spacer 27, is provided on the surface of the second positive electrode side spacer 27 in order to increase the adhesion between the second positive electrode 24 and the second diaphragm 26. ) is installed.

The second cathode side spacer 28 is an insulating member. The second cathode side spacer 28 controls the distance between the second cathode 25 and the second diaphragm 26 to a predetermined distance. The second cathode side spacer 28 has a second cathode side channel hole 36a inside the second cathode side spacer 28 that forms a second cathode side channel 36 to be described later. The second cathode side channel hole 36 a is a hole that forms the second cathode side channel 36 formed in the second cathode side spacer 28 . The second cathode-side channel hole 36a is formed through the front and back of the second cathode-side spacer 28, 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 36a and the second positive electrode side channel hole 35a are arranged so as to face each other. Further, on the surface of the second cathode-side spacer 28, a meandering packing member (not shown), which is the same as the second cathode-side spacer 28, is provided in order to improve adhesion between the second cathode 25 and the second diaphragm 26. ) is installed.

In the hypochlorous acid water generating part 3a, the second positive electrode side spacer 27 and the second negative electrode side spacer 28 are in direct contact to act as a negative electrode spacer between the second positive electrode 24 and the second negative electrode 25. Function.

In the hypochlorous acid water generator 3 a , a second positive electrode side spacer 27 and a second negative electrode side spacer 28 are interposed between the second positive electrode 24 and the second negative electrode 25 . In the hypochlorous acid water treatment unit 3b, a second positive electrode-side spacer 27, a second diaphragm 26, and a second negative electrode-side spacer 28 are interposed between the second positive electrode 24 and the second negative electrode 25. As shown in FIG. The second positive electrode 24 and the second negative electrode 25 are arranged substantially parallel to each other. The thickness of the second cathode side spacer 28 is reduced by the thickness of the second diaphragm 26 . Arranged on the surfaces of the second positive electrode side spacer 27 and the second negative electrode side spacer 28 as means for absorbing the thickness of the second diaphragm 26 with the thickness of the second positive electrode side spacer 27 and the second negative electrode side spacer 28 The second positive electrode side spacer 27 and the second negative electrode side spacer 27 and the second negative electrode are formed by designing the packing member to have a thickness greater than that of the second diaphragm 26, and deforming the packing member to a shape-absorbing material such as silicon resin. By applying pressure from both sides of the side spacer 28, it is possible to absorb the thickness of the second diaphragm 26 with the packing member and prevent liquid leakage, which is the original purpose of the packing member.

The second positive electrode packing 29a has a shape in which the outer periphery of the second positive electrode 24 is hollowed out to the size of the electrode, and is in close contact with the second positive electrode side spacer 27 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 35 (the second negative electrode supply solution 31a to be described later) does not leak. As the member of the second positive electrode packing 29a, insulating silicone rubber can be used. The second positive electrode packing 29a is thicker than the second positive electrode 24, and is crushed by being pressed by the tightening pressure so that the second positive electrode side spacer 27 and the second positive electrode side tank housing side surface 30a are crushed. It is desirable that the thickness of the second positive electrode 24 is retained while the electrodes are in close contact with each other.

The second cathode packing 29b has a shape in which the outer circumference of the second cathode 25 is hollowed out to the size of the electrode, and is in close contact with the second cathode side spacer 28 to form a second cathode side flow path in the outer circumferential direction. It is attached with tightening pressure so that the solution in 36 (the second positive and negative electrode supply solution 31a to be described later) does not leak. Insulating silicon rubber can be used as the member of the second cathode packing 29b. The second cathode packing 29b is thicker than the second cathode 25, and is crushed by the tightening pressure so that the second cathode side spacer 28 and the second cathode side tank housing side surface 30b are crushed. It is desirable that the thickness of the second cathode 25 be maintained while the thickness of the second cathode 25 is kept in close contact with the substrate.

The second positive electrode tank housing side surface 30 a is arranged so as to be in direct contact with the outside of the second positive electrode 24 . The second positive electrode-side tank housing side surface 30a is provided with an inner surface of the second positive electrode-side tank housing side surface 30a in order to prevent the solution from permeating to the outside of the second positive electrode 24, 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 24, 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 30b is arranged so as to be in direct contact with the outside of the second cathode 25 . The second cathode-side tank housing side surface 30b is provided with an inner surface of the second cathode-side tank housing side surface 30b in order to suppress penetration of the solution to the outside of the second cathode 25, 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 25, the efficiency of electrode dialysis can be improved if the solution can be prevented from leaking to the outside of the electrode.

The second negative electrode solution supply port 31 is a connection port for flowing salt water to be electrolyzed into the second channel 34 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 second positive electrode 24 , the second negative electrode solution supply port 31 is processed at a position outside the second positive electrode 24 . The second negative electrode solution supply port 31 is processed at a position outside both the second positive electrode 24 and the second negative electrode 25. Only one of the positions of may be processed.

The second negative electrode supply solution 31 a is salt water supplied from the salt water generation unit 20 . More specifically, it is salt water produced by adding and mixing salt components in the salt supply unit 22 to the tap water solution from which the anionic components have been separated and reduced in the tap water treatment unit 2 . The second negative electrode supply solution 31 a is introduced from the second negative electrode solution supply port 31 into the second channel 34 between negative and positive electrodes.

The second positive electrode solution extraction port 32 is a connection port for extracting the electrodialyzed second positive electrode extraction solution 32a 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 32 a outside the second positive electrode 24 , the second positive electrode solution extracting port 32 is processed at a position outside the second positive electrode 24 .

The second positive electrode extraction solution 32a is hypochlorous acid water containing HClO as a main component. The second positive electrode extraction solution 32 a is introduced into the second positive electrode solution extraction port 32 from the second positive electrode side channel 35 .

More specifically, the second positive electrode extraction solution 32a is obtained by electrolyzing the second negative electrode supply solution 31a in the second negative electrode inter-electrode channel 34, and then circulating it in the second positive electrode side channel 35. It is a solution that separates and dilutes the cationic components that cause residual components. Since hypochlorous acid water produced by electrolyzing salt water produced from tap water from which anion components have been removed in the hypochlorous acid water production unit 3a is used, the second positive electrode extraction solution 32a 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 33 is a connection port for extracting the electrodialyzed second cathode extraction solution 33a 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 33 a outside the second cathode 25 , the second cathode solution extraction port 33 is processed at a position outside the second cathode 25 .

The second cathode extraction solution 33a 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 33 a is led out from the second cathode side channel 36 to the second cathode solution extraction port 33 .

More specifically, the second negative electrode extracting solution 33a is obtained by electrolyzing the second negative electrode supply solution 31a in the second negative electrode inter-electrode channel 34, and then circulating it in the second negative electrode side channel 36. It is a concentrated solution of cationic components that cause residual components. Since the hypochlorous acid water produced by electrolyzing salt water in the hypochlorous acid water production unit 3a is used, Na ⁺ ions, which are cations, are separated and concentrated in the second negative electrode extraction solution 33a. 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, it is desirable that the second negative electrode solution supply port 31 is arranged on the lower side in the vertical direction, and the second positive electrode solution extraction port 32 and the second negative electrode solution extraction port 33 are 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 34 is a channel formed in a region surrounded by the second positive electrode 24 , the second positive electrode-side spacer 27 , the second negative electrode-side spacer 28 , and the second negative electrode 25 . It is a so-called non-diaphragm electrolysis flow path. The second cathode-positive electrode channel 34 has a structure in which the second positive electrode-side channel hole 35a of the second positive electrode-side spacer 27 and the second negative electrode-side channel hole 36a of the second negative electrode-side spacer 28 are overlapped. It is composed by meandering. More specifically, the second channel between positive and negative electrodes 34 reciprocates in the horizontal direction, and the number of reciprocations in the horizontal direction increases the electrolysis distance until the solution reaches from the bottom to the top. Further, by reducing the channel width of the second cathode-positive electrode channel 34, the distance becomes longer, and the electrolysis time can be lengthened. In order to reduce backflow of the liquid in the second channel 34 between the negative and positive electrodes, it is desirable that the second channel 34 between the negative and positive electrodes has a structure that goes upward in one direction, except that the channel 34 reciprocates in the horizontal direction. The second cathode-positive electrode channel 34 is connected to the second positive electrode-side channel 35 and the second negative electrode-side channel 36, and the second cathode-positive electrode supply solution 31a 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 38 after the second positive electrode solution extraction port 32 and installing a second negative electrode side supply pump 39 after the second negative electrode solution extraction port 33 . 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 second positive-negative electrode flow path 34 during the flow process, a large amount of Cl ⁻ ions, which are the anionic component of the salt water, are distributed in the vicinity of the second positive electrode 24 . However, in the vicinity of the second negative electrode 25, 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 a pair of second negative and positive electrodes, an acidic solution flows in the vicinity of the second positive electrode 24, and an alkaline solution flows in the vicinity of the second negative electrode 25. . Therefore, the hypochlorous acid water, which is more acidic and more alkaline, flows through the second positive electrode-side channel 35 and the second negative electrode-side channel 36, respectively. Specifically, acidic hypochlorous acid water containing a large amount of HCl and HClO is circulated in the second positive electrode side channel 35, and alkaline hypochlorous acid water containing a large amount of NaOH is circulated in the second negative electrode side channel 36. Chlorate water is extracted.

The second positive electrode-side channel 35 is a channel formed by a region surrounded by the second positive electrode 24 , the second positive electrode-side spacer 27 and the second diaphragm 26 . The second positive electrode side channel 35 is formed by meandering second positive electrode side channel holes 35 a of the second positive electrode side spacer 27 . More specifically, the second positive electrode-side channel 35 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 35, 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 35, it is desirable that the second positive electrode-side channel 35 has a structure in which the second positive electrode-side channel 35 goes from bottom to top in one direction other than reciprocating in the horizontal direction. One of the second positive electrode-side channels 35 is connected to the second channel between negative and positive electrodes 34, and the other is provided with the second positive electrode solution extraction port 32, and hypochlorous acid water is generated inside. Hypochlorous acid water generated by electrolyzing salt water is distributed in the portion 3a.

The second cathode-side channel 36 is a channel formed by the area surrounded by the second cathode 25 , the second cathode-side spacer 28 and the second diaphragm 26 . The second cathode-side channel 36 is formed by meandering second cathode-side channel holes 36 a of the second cathode-side spacer 28 . More specifically, the second cathode-side channel 36 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 36, 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 36, it is desirable that the second cathode-side channel 36 has a structure in which the 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 36 is connected to the second channel 34 between the negative and positive electrodes, and the other side is provided with the second negative electrode solution extraction port 33, and hypochlorous acid water is generated inside. Hypochlorous acid water generated by electrolyzing salt water is distributed in the portion 3a.

The second positive electrode side channel 35 and the second negative electrode side channel 36 face each other in a symmetrical shape with the second diaphragm 26 interposed therebetween. In other words, the second positive electrode-side channel 35 and the second negative electrode-side channel 36 are formed in meandering shapes facing each other with the second diaphragm 26 interposed therebetween. In this manner, the second positive electrode-side flow channel 35 and the second negative electrode-side flow channel 36 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 35, 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 36 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 38 after the second positive electrode solution extraction port 32 and installing a second negative electrode side supply pump 39 after the second negative electrode solution extraction port 33 . 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 3, the second cathode-positive electrode flow path 34 constituting the non-diaphragm electrolysis flow path, followed by the second positive electrode side flow path 35 constituting the diaphragm electrolysis flow path and the second Together with the cathode-side flow path 36, the meandering electrolysis flow path as the hypochlorous acid water generating unit 3 is configured in a one-pass manner. That is, in the meandering electrolytic flow path, the second cathode-positive electrode flow path 34 constitutes the front stage of the electrolytic flow path, and the second positive electrode side flow path 35 and the second negative electrode side flow path 36 constitute the electrolytic flow path. It constitutes the rear stage.

The electrolysis/electrodialysis power supply 37 is a direct-current power supply that energizes between the pair of second negative and positive electrodes. More specifically, the electrolysis/electrodialysis power supply 37 is connected to the second positive electrode 24 and the second negative electrode 25, and can apply current and voltage to the second positive electrode 24 and the second negative electrode 25. DC power supply. The electrolysis/electrodialysis power supply 37 may be used as a constant current controlled power supply so as to maintain a constant current, or may be used as a constant voltage controlled power supply so as to generate a constant voltage. The electrolysis/electrodialysis power supply 37 applies current and voltage to the second positive electrode 24 and the second negative electrode 25 common to the hypochlorous acid water generating unit 3a and the hypochlorous acid water processing unit 3b. In other words, the electrolysis/electrodialysis power supply 37 functions as a power supply for the electrodes that cause electrolysis in the hypochlorous acid water generating unit 3a, and a power supply for the electrodes that causes electrodialysis in the hypochlorous acid water treatment unit 3b. function as In order to reduce scale accumulation, the electrolysis/electrodialysis power source 37 is provided with the second positive electrode 24 and the second negative electrode 24 each time the hypochlorous acid water is supplied to the hypochlorous acid water generation unit 3 The potential of the electrode 25 may be switched to reverse the polarity and control may be performed to dissolve adhered scale.

The second positive electrode side supply pump 38 is a pump that generates a flow for extracting the second positive electrode extraction solution 32a. More specifically, the second positive electrode side supply pump 38 is installed after the second positive electrode solution extraction port 32 . Then, the second positive electrode side supply pump 38 supplies the second positive electrode solution supply port 31, the second negative electrode inter-positive channel 34, the second positive electrode side channel 35, and the second positive electrode solution extraction port 32 in this order. A flow of each solution (second negative electrode supply solution 31a, second positive electrode extraction solution 32a) is caused to flow. At this time, the second positive electrode side supply pump 38 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating section 3a, and at the same time, controls the flow rate of the solution flowing through the hypochlorous acid water treatment section 3b 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 39 is a pump that generates a flow for extracting the second cathode extraction solution 33a. More specifically, the second cathode side supply pump 39 is installed after the second cathode solution extraction port 33 . Then, the second negative electrode side supply pump 39 supplies the second negative electrode solution supply port 31, the second negative electrode inter-positive channel 34, the second negative electrode side channel 36, and the second negative electrode solution extraction port 33 in this order. A flow of each solution (second negative electrode supply solution 31a, second negative electrode extraction solution 33a) is caused to flow. At this time, the second cathode side supply pump 39 integrally controls the flow rate of the solution flowing through the hypochlorous acid water generating section 3a, and at the same time, keeps the flow rate of the solution flowing through the hypochlorous acid water treatment section 3b 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 anode-positive electrode channel 34 is controlled as the total amount of the second anode-side supply pump 38 and the second cathode-side supply pump 39 .

As described above, the hypochlorous acid water supply device 1 is configured by each member.

Next, the treatment operation in the tap water treatment unit 2 will be described with reference to FIGS. 4 and 5. FIG. FIG. 5 is a horizontal sectional image diagram of the tap water treatment unit.

As shown in FIGS. 4 and 5, in the tap water treatment unit 2, a first cathode supply solution 11a, which is tap water, passes through a first cathode solution supply port 11 and continues to the first cathode side channel 15. A first positive electrode supply solution 13 a , which is tap water, is continuously supplied to the first positive electrode side channel 16 through the first positive electrode solution supply port 13 . Then, the first negative electrode supply solution 11a supplied from the first negative electrode solution supply port 11 flows through the meandering first negative electrode side channel 15, and flows through the first positive electrode solution supply port. The first positive electrode supply solution 13a supplied from 13 flows through the first positive electrode side channel 16 which is also formed in a meandering manner. At this time, the first negative electrode supply solution 11a and the first positive electrode supply solution 13a are opposed to each other with the first diaphragm 6 interposed therebetween and flowed in the same direction to flow into the first negative electrode side channel 15 and the first positive electrode side. Voltages are applied to the first negative electrode 4 and the first positive electrode 5 at both ends at the same time as they flow through the channel 16 . When a voltage is applied, the cationic components are attracted to the first negative electrode 4 side, and the anionic components (Cl ⁻ ions, SO ₄ ²⁻ ions, and NO ₃ ^-ions, etc.) are attracted. Since the first diaphragm 6 is made of a membrane that is permeable only to anion components, the anion component (Cl ⁻ ion , SO ₄ ²⁻ ions, NO ₃ ⁻ ions, etc.) pass through the first diaphragm 6, pass through the first positive electrode supply solution 13a in the first positive electrode side channel 16, and reach the first positive electrode 5 side. will attract the anionic component. On the contrary, since the cation component flowing through the first positive electrode side channel 16 cannot permeate the first diaphragm 6, only the cation component contained in the first negative electrode side channel 15 reaches the first negative electrode 4. Attracted. By repeating this, the anion component contained in the first negative electrode supply solution 11a flowing through the first negative electrode side channel 15 is converted into the first positive electrode supply solution 13a flowing through the first positive electrode side channel 16. , electrodialysis progresses, and the first negative electrode supply solution 11a flowing through the first negative electrode-side channel 15 is separated and diluted in anion components, and flows through the first positive electrode-side channel 16. The first positive electrode supply solution 13a 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 12 as the first cathode extraction solution 12a. A diluted tap water solution is extracted. On the contrary, the tap water solution in which the anion component contained in the tap water is separated and concentrated is extracted from the first positive electrode solution extraction port 14 as the first positive electrode extraction solution 14a. 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 2, the amount of movement of the anion component is increased by lengthening the electrodialysis time in the first negative electrode side channel 15 and the first positive electrode side channel 16. As a result, the anion component contained in the tap water of the first cathode extraction solution 12a 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 15 and the first positive electrode side channel 16. 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 15 and the first positive electrode side channel 16, the distance becomes longer, and the electrodialysis time can be lengthened.

Each pump (first negative electrode side supply pump 18 and first positive electrode side supply pump 19 ), 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 15 is relatively increased and the flow velocity in the first positive electrode-side channel 16 is relatively decreased, the first cathode-side channel 15 and the second The first positive electrode extraction solution 14a extracted from the first positive electrode side channel 16 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 16 is the same. Therefore, when draining the first positive electrode extraction solution 14a, it is desirable to reduce the flow velocity in the first positive electrode side channel 16. FIG.

Next, referring to FIGS. 8 and 9, the processing operation in the hypochlorous acid water generating section 3a of the hypochlorous acid water generating unit 3 will be described. FIG. 9 is a horizontal cross-sectional image diagram of the hypochlorous acid water generating part 3a of the hypochlorous acid water generating unit 3. As shown in FIG.

As shown in FIGS. 8 and 9, in the hypochlorous acid water generating section 3a of the hypochlorous acid water generating unit 3, the second cathode electrode supply solution 31a, which is salt water, is passed through the second cathode electrode solution supply port 31. is continuously supplied to the second cathode-positive electrode channel 34 . Then, the second negative electrode supply solution 31a supplied from the second negative electrode solution supply port 31 flows through the meandering second channel 34 between the positive and negative electrodes. At this time, the supply solution 31a for the second negative and positive electrodes flows through the channel 34 between the second negative and positive electrodes, and at the same time, a voltage is applied to the second positive electrode 24 and the second negative electrode 25 at both ends. When a voltage is applied, anion components (Cl ⁻ ions) are attracted to the second positive electrode 24 side, and cationic components (Na ⁺ ions) are attracted to the second negative electrode 25 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 24 side and NaOH on the second negative electrode 25 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 3a, the amount of electrolysis of NaCl is increased by increasing the time of electrolysis in the second channel 34 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 34 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 34, the distance can be lengthened, and the electrolysis time can be lengthened.

Next, referring to FIGS. 8 and 10, the processing operation of the hypochlorous acid water treatment section 3b of the hypochlorous acid water generation unit 3 will be described. FIG. 10 is a horizontal cross-sectional image diagram of the hypochlorous acid water treatment part 3b of the hypochlorous acid water generation unit 3. As shown in FIG.

As shown in FIGS. 8 and 10, in the hypochlorous acid water treatment section 3b of the hypochlorous acid water generation unit 3, hypochlorous acid produced by electrolyzing salt water in the hypochlorous acid water generation section 3a is Water is continuously supplied to the second positive electrode side channel 35, and the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generating section 3a is generated in the second negative electrode side channel 36. continuously supplied to Then, the hypochlorous acid water generated by electrolyzing salt water in the hypochlorous acid water generating unit 3a flows through the meandering second positive electrode side flow path 35, and similarly meanders. It flows through the formed second cathode side channel 36 . At this time, the hypochlorous acid water generated by electrolyzing the salt water in the hypochlorous acid water generation unit 3a is circulated in the same direction to form the second positive electrode side channel 35 and the second negative electrode side channel 36. , respectively, a voltage is applied to the second positive electrode 24 and the second negative electrode 25 at both ends. When a voltage is applied, anion components are attracted to the second positive electrode 24 side, and cationic components (Na ⁺ ions, Ca ²⁺ ions and Mg ²⁺ ions, etc.) are attracted. Since the second diaphragm 26 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 26, pass through the hypochlorous acid water in the second negative electrode side channel 36, and reach the second negative electrode 25 side. Cationic components are attracted. On the contrary, since the anion component flowing through the second negative electrode side channel 36 cannot permeate the second diaphragm 26, only the anion component contained in the second positive electrode side channel 35 can reach the second positive electrode 24. Attracted. By repeating this, the cation components contained in the hypochlorous acid water flowing through the second positive electrode-side channel 35 move to the hypochlorous acid water flowing through the second negative electrode-side channel 36. As electrodialysis progresses, the hypochlorous acid water flowing through the second positive electrode-side channel 35 is separated and diluted in the cation components, and the hypochlorous acid water flowing through the second negative electrode-side channel 36 is , the cationic components are concentrated and extracted. As a result, from the second positive electrode solution extraction port 32, as the second positive electrode extraction solution 32a, the components containing cations, which are the residual components, are separated and diluted to produce hypochlorous acid water in which the HClO component is the main component. extracted. On the contrary, from the second cathode solution extraction port 33, a solution (hypochlorous acid water) containing components in which the cations constituting the residual components are separated and concentrated is extracted as the second cathode extraction solution 33a. .

In the treatment operation in the hypochlorous acid water treatment unit 3b, the movement amount of the cation component is increased by increasing the electrodialysis time in the second positive electrode side channel 35 and the second negative electrode side channel 36. can be increased to further reduce residual components composed of Na ⁺ ions in the second positive electrode extraction solution 32a 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 35 and the second negative electrode side channel 36. 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. Further, by reducing the cross-sectional areas of the second positive electrode side channel 35 and the second negative electrode side channel 36, the distance becomes longer, and the electrodialysis time can be lengthened.

The pumps are controlled so that the solutions passing through the second positive electrode side channel 35 and the second negative electrode side channel 36 have the same flow rate, 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 35 is relatively increased and the flow velocity in the second negative electrode side channel 36 is relatively decreased, the second positive electrode side channel 35 and the second The second cathode extraction solution 33a extracted from the second cathode-side channel 36 is smaller and has a higher concentration than when the two-cathode-side channel 36 has the same flow velocity. Accordingly, when the second cathode extraction solution 33a is drained, it is desirable to slow down the flow velocity of the second cathode side channel 36. FIG.

Next, referring to FIG. 11, each solution (tap water, salt water, and The characteristics (conductivity, pH, and effective chlorine concentration) of chlorous acid water) will be described. FIG. 11 is an experimental image diagram for evaluating the characteristics of the hypochlorous acid water flowing through the hypochlorous acid water supply device 1. FIG. In addition, the characteristic evaluation is based on the solutions (tap water, salt water, and each hypochlorite acid water).

In the experimental evaluation, the tap water stored in the tap water tank 40 was supplied to the tap water treatment unit 2 and circulated, the first negative electrode extraction solution 12a was collected in the salt water generation tank 21, and the first positive electrode extraction was performed. The solution 14a was collected in the drain side tank 23 . Subsequently, salt water obtained by adding a salt component to the first negative electrode extraction solution 12a recovered in the salt water generation tank 21 is supplied to the hypochlorous acid water generation unit 3 and circulated, and the second positive electrode extraction solution 32a is supplied as follows. While recovering in the chlorous acid water tank 41, the second cathode extraction solution 33a was recovered in the drain side tank 23. At this time, the second negative electrode extraction solution 33a is mixed with the first positive electrode extraction solution 14a collected in the drain side tank 23. In the characteristic evaluation, the first positive electrode extraction solution 14a before mixing was and the second cathode extraction solution 33a are also sampled.

The tap water treatment unit 2 was formed with a first negative electrode side channel 15 and a first positive electrode side channel 16 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 3a of the hypochlorous acid water generating unit 3 is formed with a second cathode-positive electrode channel 34 having a channel cross-sectional area of 24 mm ² and a channel length of 360 mm. As the chlorous acid water treatment part 3b, one having a second positive electrode side channel 35 and a second negative electrode side channel 36 with a channel cross-sectional area of 24 mm ² and a channel length of 320 mm was used. The flow conditions of the first negative electrode side supply pump 18, the first positive electrode side supply pump 19, the second positive electrode side supply pump 38, and the second negative electrode side supply pump 39 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 17 and the electrolysis/electrodialysis power supply 37 . The tap water (the first negative electrode supply solution 11a and the first positive electrode supply solution 13a) supplied to the tap water treatment unit 2 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 21, 5 mL of concentrated salt water (salt water with a concentration of 0.5%) is supplied from the salt supply unit 22 and mixed with the first cathode extraction solution 12a recovered in the salt water generation tank 21 to produce hypochlorous acid. Salt water to be supplied to the acid water generating unit 3 was generated.

FIG. 12 summarizes the results of characterization of each solution. FIG. 12 is a diagram showing the characteristics of the hypochlorous acid water that flows through the hypochlorous acid water supply device 1. As shown in FIG.

As shown in FIG. 12, the salt water obtained by adding the salt component to the first cathode extraction solution 12a collected in the salt water generation tank 21 had 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 40 .

On the contrary, the first positive electrode extraction solution 14a (before mixing) collected in the drain side tank 23 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 14a, and ^Cl.sup.- ions contained in the tap water are electrolyzed into hypochlorous acid.

Next, the second positive electrode extraction solution 32a recovered in the hypochlorous acid water tank 41 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 3, acidic hypochlorous acid water is generated as the second positive electrode extraction solution 32a.

On the contrary, the second cathode extraction solution 33a (before mixing) collected in the drainage side tank 23 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 generating unit 3, alkaline hypochlorous acid water is generated as the second cathode extraction solution 33a.

On the other hand, the extraction solution (after mixing) collected in the drainage side tank 23 and obtained by mixing the first positive electrode extraction solution 14a and the second negative electrode extraction solution 33a 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 14a is acidic and the second negative electrode extracting solution 33a 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 23 .

In addition, by setting the flow rate of the supply pumps (the first positive electrode side supply pump 19 and the second negative electrode side supply pump 39) connected to the drainage side tank 23 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 apparatus 1 according to Embodiment 1, the following effects can be obtained.

(1) The hypochlorous acid water supply device 1 supplies tap water to the meandering first diaphragm electrolysis flow path (first negative electrode side flow path 15 and first positive electrode side flow path 16). A tap water treatment unit 2 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 4 and the first positive electrode 5), and tap water. Salt water produced by adding a salt component to the tap water solution (first cathode extraction solution 12a) delivered from the tap water electrolysis channel (first cathode side channel 15) on the cathode side of the water treatment unit 2 to generate salt water. A generation unit 20, a meandering electrolysis flow channel configured to be able to supply the salt water (second negative electrode supply solution 31a) generated by the salt water generation unit 20, 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 24 and the second negative electrode 25) from the salt water supplied inside (second negative electrode inter-electrode channel 34). A hypochlorous acid water generator 3a that continuously electrolytically generates, and a second membrane electrolysis flow path (second positive electrode side flow path 35 and second negative electrode side flow path 36) that constitutes the latter stage of the electrolysis flow path. Hypochlorous acid water supplied from the hypochlorous acid water generating unit 3a to each of the inside is continuously supplied by energizing between the pair of second negative and positive electrodes (between the second positive electrode 24 and the second negative electrode 25) and a hypochlorous acid water generation unit 3 having a hypochlorous acid water treatment unit 3b that effectively treats the hypochlorous acid water treatment unit 3b. The hypochlorous acid water (second positive electrode extraction solution 32a) delivered from the side flow path 35) is supplied to the outside.

According to such a configuration, salt water (second negative electrode supply solution 31a) generated from tap water solution (first negative electrode extraction solution 12a) in which the anion component is reduced while reducing the anion component contained in tap water. The hypochlorous acid water supply device 1 can supply hypochlorous acid water (second positive electrode extraction solution 32a) in which residual components generated by electrolysis are reduced. More specifically, in the hypochlorous acid water supply device 1, tap water is supplied to the tap water treatment unit 2, and the tap water electrolysis flow path (first cathode side flow path) on the cathode side of the tap water treatment unit 2 15), the tap water solution (first negative electrode extraction solution 12a) added with a salt component is supplied to the hypochlorous acid water generating unit 3, so that the hypochlorous acid water The chloric acid water generation unit 3 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 3, 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 34), and further, in the hypochlorous acid water treatment unit 3b, the second diaphragm electrolysis flow path (the second positive electrode side flow path 35 and the second Hypochlorous acid water generated in the non-diaphragm electrolysis channel is circulated in each of the two negative electrode side channels 36), and the cation component that causes the residual component is separated and reduced from the positive electrode side. It can be extracted as acid water (second positive electrode extraction solution 32a). 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 distributed to the hypochlorous acid water generation unit 3, the anion component of tap water is hypochlorite It is mixed with the hypochlorous acid water and extracted from the electrolytic channel (second positive electrode side channel 35) on the positive electrode side of the acid water treatment unit 3b. In particular, chloride ions (Cl ^- ions) in tap water are electrolyzed to produce hypochlorous acid water, which greatly affects the variation in the concentration of hypochlorous acid water that is finally extracted, and stabilizes the concentration. of hypochlorous acid water is not generated. For this reason, it is necessary to reduce it in the tap water treatment unit 2 in advance. Anions other than chloride ions (Cl ⁻ ions) in tap water include ions such as SO ₄ ²⁻ and NO ₃ ⁻ . 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, it is desirable to similarly reduce the amount in the tap water treatment unit 2 in advance.

In addition, the second positive and negative electrodes (the second positive electrode 24 and the second negative electrode 25) are used in common for the hypochlorous acid water generation unit 3a and the hypochlorous acid water treatment unit 3b, and the non-diaphragm electrolysis flow path and the second 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 24, and a large number of cations are present in the vicinity of the second negative electrode 25. 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 side of the second positive electrode 24 .

Furthermore, in the hypochlorous acid water supply device 1, by supplying salt water obtained by adding salt components to tap water to the hypochlorous acid water generation unit 3, non-diaphragm electrolytic flow is generated in the hypochlorous acid water generation unit 3a. 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 treatment unit 3b. 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 1 can supply the hypochlorous acid water from which the residual components generated by the electrolysis of the salt water are separated to the outside.

(2) In the hypochlorous acid water supply device 1, the first diaphragm electrolysis flow channel (the first negative electrode side flow channel 15 and the second positive electrode side flow channel 16) has the first negative electrode 4 in the flow channel. A meandering first negative electrode-side channel 15 exposed and extending along the flow channel is provided in parallel to face the first negative electrode-side channel 15, and the first positive electrode 5 is exposed along the channel. A meandering first positive electrode-side flow channel 16 extending as a serpentine channel is provided to separate the first negative electrode-side flow channel 15 and the first positive electrode-side flow channel 16, and the solution flowing through the flow channel and a first diaphragm 6 that allows the anions contained therein to permeate. A pair of first negative and positive electrodes (first negative electrode 4 and first positive electrode 5) expose the first negative electrode 4 to the first negative electrode side channel 15 by the first negative electrode side spacer 7, and By exposing the first positive electrode 5 to the first positive electrode-side channel 16 by the positive electrode-side spacer 8, the first positive electrode 5 is formed in a meandering shape. Tap water is configured to flow in the same direction in both the first negative electrode side channel 15 and the first positive electrode side channel 16 . According to such a configuration, the tap water treatment unit 2 circulates the tap water while applying a voltage in the same direction across the first diaphragm 6, so that the anion component contained in the tap water is continuously separated and reduced. can do. For this reason, the tap water solution in which anion components are separated and reduced is discharged from the tap water electrolysis channel (first negative electrode side channel 15) on the negative electrode side of the tap water treatment unit 2 (first negative electrode side channel 15). The electrode extraction solution 12 a ) can be stably supplied to the brine generation unit 20 .

(3) In the hypochlorous acid water supply device 1, the planar first cathode 4, the planar first diaphragm 6 facing the first cathode 4, the first cathode 4 and the first diaphragm 6 and a first cathode-side spacer 7 that exposes the first cathode 4 and the first diaphragm 6 in the first cathode-side channel 15 along the channel. The electrode-side channel 15 is composed of the first cathode 4 and the first diaphragm 6 exposed along the channel, and the first cathode-side spacer 7 . A planar first positive electrode 5 , a planar first diaphragm 6 facing the first positive electrode 5 , provided between the first positive electrode 5 and the first diaphragm 6 , and extending along the channel. and a first positive electrode-side spacer 8 that exposes the first positive electrode 5 and the first diaphragm 6 in the first positive electrode-side channel 16, and the first positive electrode-side channel 16 extends along the channel. It is composed of the exposed first positive electrode 5 , the first diaphragm 6 , and the first positive electrode side spacer 8 . According to such a configuration, anion components contained in the tap water are separated and reduced by the channel shape formed in the first negative electrode side spacer 7 and the channel shape formed in the first positive electrode side spacer 8. 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 1, the non-diaphragm electrolytic flow path (the flow path 34 between the second negative and positive electrodes) includes the planar second positive electrode 24 and the planar electrode 24 facing the second positive electrode 24. and a spacer between negative and negative electrodes provided between the second positive electrode 24 and the second negative electrode 25 . A pair of second negative and negative electrodes (a second positive electrode 24 and a second negative electrode 25) are formed in a meandering shape by exposing the second positive electrode 24 and the second negative electrode 25 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 1, the second diaphragm electrolysis flow channel (the second positive electrode side flow channel 35 and the second negative electrode side flow channel 36) has the second positive electrode 24 in the flow channel. A meandering second positive electrode-side channel 35 exposed and extending along the flow channel 35 is provided in parallel to face the second positive electrode-side channel 35, and the second negative electrode 25 is exposed along the channel. The meandering second negative electrode side flow path 36 extending in the direction of the second positive electrode side flow path 35 and the second negative electrode side flow path 36 are separated from each other, and the solution flowing through the flow path and a second diaphragm 26 permeable to contained cations. A pair of second negative and negative electrodes (the second positive electrode 24 and the second negative electrode 25) exposes the second positive electrode 24 to the second positive electrode side channel 35 by the second positive electrode side spacer 27, By exposing the second cathode 25 to the second cathode-side channel 36 by the cathode-side spacer 28, the second cathode-side channel 35 and the second cathode-side channel 36 have , the hypochlorous acid water supplied from the hypochlorous acid water generating unit 3a 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 second diaphragm 26, 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 35) on the positive electrode side of the hypochlorous acid water treatment unit 3b. Water (second positive electrode extraction solution 32a) can be stably supplied to the outside.

(6) In the hypochlorous acid water supply device 1, the planar second positive electrode 24, the planar second diaphragm 26 facing the second positive electrode 24, the second positive electrode 24 and the second diaphragm 26 and a second positive electrode side spacer 27 that exposes the second positive electrode 24 and the second diaphragm 26 in the second positive electrode side channel 35 along the channel, The electrode-side channel 35 is composed of the second positive electrode 24 and the second diaphragm 26 exposed along the channel, and the second positive electrode-side spacer 27 . A planar second cathode 25, a planar second diaphragm 26 facing the second cathode 25, and a second diaphragm provided between the second cathode 25 and the second diaphragm 26 along the channel. and a second cathode-side spacer 28 that exposes the second cathode 25 and the second diaphragm 26 in the second cathode-side channel 36, and the second cathode-side channel 36 extends along the channel. It is composed of the exposed second cathode 25 , the second diaphragm 26 , and the second cathode-side spacer 28 . 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 27 and the flow channel shape formed in the second negative electrode side spacer 28. 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 1, the cathode-positive electrode spacer is formed by superimposing the second positive electrode side spacer 27 and the second negative electrode side spacer 28 on each other. According to such a configuration, the structure can be simplified, and the non-diaphragm electrolytic flow path (the second cathode-positive electrode flow path 34) and the second membrane electrolytic flow path (the second positive electrode side flow path 35 and the second negative electrode side flow path 35) It is possible to suppress liquid leakage and disturbance of the ion distribution in the flow path due to the boundary between the side flow path 36) and allow the liquid to flow.

(8) In the hypochlorous acid water supply device 1, it is provided at each inlet on the positive electrode side and the negative electrode side of the tap water treatment unit 2, and the first diaphragm electrolysis channel (first negative electrode side channel 15 and a first negative electrode side supply pump 18 and a first positive electrode side supply pump 19 that supply tap water to the first positive electrode side channel 16), and the positive electrode side and negative electrode of the hypochlorous acid water generation unit 3 provided at each outlet on the side, and supplies salt water to the non-diaphragm electrolysis flow path (the second positive electrode-side flow path 34), and the second diaphragm electrolysis flow path (the second positive electrode side flow path 35 and the second A second positive electrode side supply pump 38 and a second negative electrode side supply pump 39 for supplying the hypochlorous acid water electrolytically generated in the negative electrode side channel 36) are provided. The first negative electrode side supply pump 18 and the first positive electrode side supply pump 19 supply tap water to the first negative electrode side channel 15 and the first positive electrode side channel 16 respectively at a constant flow rate. A second positive electrode-side supply pump 38 and a second negative electrode-side supply pump 39 supply the hypochlorous acid water electrolytically generated in the hypochlorous acid water generating section 3a to the second positive electrode-side channel 35 and the second negative electrode-side supply pump 39. They were supplied to the side channels 36 at a constant flow rate. As a result, in the first diaphragm electrolysis flow channel, the time during which the voltage is applied in the first negative electrode side flow channel 15 can be made constant, and in the first positive electrode side flow channel 16, 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 15 is separated and diluted, and the concentration at which the anion component contained in the tap water in the first positive electrode side channel 16 is concentrated. can be stabilized. 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 35 can be made constant, and the voltage is applied in the second negative electrode side channel 36. 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 35 is separated and diluted, and the hypochlorous acid water in the second negative electrode side channel 36 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 1, tap water solution (first positive electrode extraction A drain side tank 23 for storing the solution 14a) is provided. The drain-side tank 23 is mixed with the solution (second cathode extraction solution 33a) delivered from the electrolysis channel (second cathode-side channel 36) on the cathode side of the hypochlorous acid water generating unit 3. connected as follows. According to such a configuration, the tap water aqueous solution (first positive electrode extraction solution 14a) with an acidic pH sent from the tap water electrolysis channel on the positive electrode side of the tap water treatment unit 2 and the hypochlorous acid water generation unit 3 Neutralization is carried out by mixing with hypochlorous acid water (second cathode extraction solution 33a) having an alkaline pH sent from the electrolysis flow path (second cathode side flow path 36) 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 flow channel (second negative electrode side flow channel 36) on the negative electrode side of the hypochlorous acid water generation unit 3. can be drained while being close to the

(Embodiment 2)
A space sterilization system 50 using a hypochlorous acid water supply apparatus 1 according to Embodiment 2 of the present invention will be described with reference to FIGS. 1 and 13 . FIG. 13 is a schematic diagram of a space sterilization system 50 using the hypochlorous acid water supply device 1 according to Embodiment 2 of the present invention. A spatial sterilization system 50 according to Embodiment 2 described below is a system incorporating the hypochlorous acid water supply apparatus 1 according to Embodiment 1. FIG. In the description of Embodiment 2, the same reference numerals are given to substantially the same configuration as the hypochlorous acid water supply device 1 according to Embodiment 1, and the description is partially simplified or omitted. There is

The space sterilization system 50 according to the second embodiment sprays the hypochlorous acid water generated from the hypochlorous acid water supply device 1 from the mist spray device 54 and flows it to the drain port 56 in the bathroom space. It is a system that sterilizes and cleans the bathroom space. The bathroom space corresponds to the "predetermined space" in the claims.

Specifically, as shown in FIG. 13, the space sterilization system 50 includes a hypochlorous acid water supply device 1 (tap water treatment unit 2, hypochlorous acid water generation unit 3, first cathode side supply pump 18, first positive electrode side supply pump 19, salt water generation tank 21, salt supply unit 22, drainage side tank 23, second positive electrode side supply pump 38, second negative electrode side supply pump 39), and positive electrode side extraction It has a solution tank 51 , a negative electrode side extraction solution tank 52 , a positive electrode side extraction solution bathroom piping 53 , a mist spray device 54 , a negative electrode side extraction solution bathroom piping 55 and a drain port 56 .

The tap water treatment unit 2 that constitutes the hypochlorous acid water supply device 1 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 21 . In the salt water generation tank 21, salt components are added from the salt supply unit 22, mixed, and supplied to the hypochlorous acid water generation unit 3 as salt water. Tap water is supplied to the tap water treatment unit 2 by a first negative electrode side supply pump 18 and a first positive electrode side supply pump 19 . A solution (first positive electrode extraction solution 14 a ) obtained by separating and condensing anion components contained in tap water by electrodialysis is extracted to the drain side tank 23 .

The hypochlorous acid water generation unit 3 supplies the salt water generated in the salt water generation tank 21, 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 32 . The extracted second positive electrode extraction solution 32 a is hypochlorous acid water containing mainly HClO with high sterilizing power, and is sent to the positive electrode side extraction solution tank 51 . Further, the extracted solution is sent to the mist spraying device 54 through the bathroom piping 53 on the positive electrode side and sprayed into the bathroom space.

In addition, the hypochlorous acid water in which the residual cation component is separated and concentrated is extracted from the second negative electrode solution extraction port 33, supplied to the drain side tank 23, and extracted by the tap water treatment unit 2. It is mixed with the first positive electrode extraction solution 14a and discharged. This discharged liquid is hypochlorous acid water containing mainly NaClO and alkaline components, which has high detergency, and is sent to the cathode side extraction solution tank 52 via the drainage side tank 23 . Further, it is sent to the drain port 56 through the cathode-side extraction solution bathroom pipe 55 and flows through the drain port 56 to the drain pipe.

The positive electrode-side extraction solution tank 51 sends the second positive electrode extraction solution 32a, which is hypochlorous acid water containing mainly HClO with high sterilizing power extracted from the second positive electrode-side channel 35, to the mist spray device 54. It is a temporary storage tank until it is liquefied. The positive electrode side extraction solution tank 51 is connected to a mist spraying device 54 via a positive electrode side extraction solution bathroom piping 53 .

The negative electrode side extraction solution tank 52 contains NaClO with high detergency extracted from the drainage side tank 23 in which the first positive electrode side channel 16 and the second negative electrode side channel 36 are mixed, and hypochlorous acid mainly composed of alkaline components. It is a tank that temporarily stores water until it is sent to the drain port 56 . The cathode-side extraction solution tank 52 is connected to a drain port 56 via a cathode-side extraction solution bathroom pipe 55 .

The positive electrode side extraction solution bathroom pipe 53 is a pipe for sending liquid from the positive electrode side extraction solution tank 51 to the mist spray device 54 . It is installed behind the wall and ceiling of the bathroom and connected to a mist spraying device 54 installed on the ceiling.

The cathode-side extraction solution bathroom pipe 55 is a pipe for sending liquid from the cathode-side extraction solution tank 52 to the drain port 56 . It is installed behind the wall and floor of the bathroom and connected to the drain port 56. - 特許庁

The mist spraying device 54 is a device for spraying hypochlorous acid water in the form of mist in the bathroom space. More specifically, the mist spraying device 54 finely sprays the second positive electrode extraction solution 32a, which is hypochlorous acid water, transported from the positive electrode side extraction solution tank 51 through the positive electrode side extraction solution bathroom piping 53. It is a device that emits a fine mist. The mist spraying device 54 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 is a two-fluid spraying method that uses compressed air to make it finer, an ultrasonic method that uses an ultrasonic element to spray 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 54 corresponds to the "sterilization device" in the claims.

The drain port 56 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 mixed solution of the first positive electrode extraction solution 14a and the second negative electrode extraction solution 33a is conveyed from the negative electrode side extraction solution tank 52 through the negative electrode side extraction solution bathroom piping 55 to the drain port 56, and the cleaning power is improved. The drain port 56 and the drain pipe connected to the drain port 56 can be cleaned of contamination by the high NaClO and the hypochlorous acid water containing mainly alkaline components. The drain port 56 can be read as a "drain pipe" in the claims.

As described above, according to the space sterilization system 50 using the hypochlorous acid water supply device 1 according to the second embodiment, the following effects can be obtained.

(10) The spatial sterilization system 50 includes the above-described hypochlorous acid water supply device 1 and, as the outside, an electrolysis flow path (second positive electrode side flow path 35 ), and a mist spraying device 54 that emits 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 35) on the positive electrode side of the hypochlorous acid water treatment unit 3b 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 35) on the positive electrode side of the hypochlorous acid water treatment unit 3b 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) In the space sterilization system 50, a predetermined space is provided with a drain port 56 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 3b and the hypochlorous acid water sent from the electrolysis channel (second cathode side channel 36) on the cathode side of the hypochlorous acid water treatment unit 3b ( It is configured to be mixed with the second cathode extraction solution 33a) and introduced. According to this configuration, the hypochlorous acid water (second cathode extraction solution 33a) delivered from the electrolysis flow path (second cathode side flow path 36) on the cathode side of the hypochlorous acid water treatment unit 3b is neutralized to some extent by the acidic tap water solution (first positive electrode extraction solution 14a) delivered from the tap water electrolysis channel (first positive electrode side channel 16) on the positive electrode side of the tap water treatment unit 2. However, it can be introduced into the drain port 56 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 56 .

Although the present invention has been described above based on the embodiments, the present invention is by no means limited to the above-described embodiments, and various modifications and improvements are possible without departing from the scope of the present invention. can be easily guessed.

The hypochlorous acid water supply device according to the present invention reduces anion components contained in tap water, and is contained in HClO-based hypochlorous acid water produced by electrolysis of salt water with reduced anion components. It is a device that can continuously supply hypochlorous acid water with reduced residual ingredients, and by spraying mist using this hypochlorous acid water, sterilize mold and bacteria in the bathroom space. It is a useful means for suppressing corrosion of metals and the like used in the bathroom while performing the cleaning.

1 Hypochlorous acid water supply device 2 Tap water treatment unit 3 Hypochlorous acid water generation unit 3a Hypochlorous acid water generation unit 3b Hypochlorous acid water processing unit 4 First negative electrode 5 First positive electrode 6 First Diaphragm 7 First negative electrode side spacer 8 First positive electrode side spacer 9a First negative electrode packing 9b First positive electrode packing 10a First negative electrode side tank housing side 10b First positive electrode side tank housing side 11 First negative electrode solution supply port 11a First negative electrode supply solution 12 First negative electrode solution extraction port 12a First negative electrode extraction solution 13 First positive electrode solution supply port 13a First positive electrode supply solution 14 First positive electrode solution Extraction port 14a First positive electrode extraction solution 15 First negative electrode side channel 15a First negative electrode side channel hole 16 First positive electrode side channel 16a First positive electrode side channel hole 17 Electrodialysis power source 18 First Negative electrode side supply pump 19 First positive electrode side supply pump 20 Salt water generation unit 21 Salt water generation tank 22 Salt supply part 23 Drainage side tank 24 Second positive electrode 25 Second negative electrode 26 Second diaphragm 27 Second positive electrode side spacer 28 Second negative electrode side spacer 29a Second positive electrode packing 29b Second negative electrode packing 30a Second positive electrode side tank housing side surface 30b Second negative electrode side tank housing side surface 31 Second negative electrode solution supply port 31a Second negative electrode supply solution 32 Second positive electrode solution extraction port 32a Second positive electrode extraction solution 33 Second negative electrode solution extraction port 33a Second negative electrode extraction solution 34 Channel between second negative electrode 35 Second positive electrode side Flow path 35a Second positive electrode side flow path hole 36 Second negative electrode side flow path 36a Second negative electrode side flow path hole 37 Electrolysis/electrodialysis power source 38 Second positive electrode side supply pump 39 Second negative electrode side supply Pump 40 tap water tank 41 hypochlorous acid water tank 50 space sterilization system 51 positive electrode side extraction solution tank 52 negative electrode side extraction solution tank 53 positive electrode side extraction solution bathroom piping 54 mist spray device 55 negative electrode side extraction solution bathroom Piping 56 Drain port

Claims (11)

a tap water treatment unit that continuously separates anion components contained in the tap water by energizing between the pair of first cathode and cathode electrodes from the tap water supplied in the meandering first diaphragm electrolysis flow path;
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 a non-membrane electrolysis flow path forming a front stage of the electrolysis flow path. The hypochlorous acid water generating unit for continuously electrolytically generating hypochlorous acid water by energization between the negative and positive electrodes, and the second electrolytic flow path with a diaphragm that constitutes the latter stage of the electrolytic flow path, respectively. 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;
with
A hypochlorous acid water supply device for supplying the hypochlorous acid water sent from the electrolysis channel on the positive electrode side of the hypochlorous acid water treatment unit to the outside. 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
2. The hypochlorous acid water supply according to claim 1, wherein said tap water is configured to flow in the same direction in said first negative electrode side channel and said first positive electrode side channel. Device. 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 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 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;
3. The following according to claim 2, wherein 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. Chlorous acid water supply device. The non-diaphragm electrolysis 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 negative and positive electrodes,
The pair of second negative and negative electrodes are formed in a meandering shape by exposing the second positive electrode and the second negative electrode to the non-diaphragm electrolytic flow path by the spacer between the positive and negative electrodes. 4. The hypochlorous acid water supply device according to any one of 3. The second diaphragm-equipped electrolysis flow path includes a meandering second positive electrode-side flow path in which the second positive electrode is exposed and extended along the flow path,
a meandering second cathode-side flow channel arranged in parallel to face the second positive electrode-side flow channel, with the second negative electrode extending along the flow channel so as to be exposed;
a second diaphragm provided to separate the second positive electrode-side channel and the second negative electrode-side channel and allowing 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. Hypochlorous acid water supply device according to claim 4. 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 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 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;
6. The second cathode-side channel according to claim 5, wherein 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. Chlorous acid water supply device. 7. The hypochlorous acid water supply device according to claim 5, wherein said cathode-positive electrode spacer is formed by stacking said second anode-side spacer and said second cathode-side spacer. 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 to supply the tap water to the first diaphragm electrolysis channel; 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;
with
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 The hypochlorous acid water supply device according to any one of claims 5 to 7, which supplies the hypochlorous acid water to each of the negative electrode side channels at a constant flow rate. 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;
9. The drain-side tank is connected to mix the hypochlorous acid water sent from the electrolysis flow path on the cathode side of the hypochlorous acid water generation unit. The hypochlorous acid water supply device according to claim 1. The hypochlorous acid water supply device according to any one of claims 1 to 9,
As the outside, a sterilization device that emits hypochlorous acid water mist to 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. ,
A space 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. The spatial sterilization system according to claim 10, configured to be mixed with hypochlorous acid water and introduced.