JP4217233B2 - Ozone water generator - Google Patents

Description

  The present invention relates to an ozone water generating apparatus that generates ozone water by electrolysis of water, and more particularly to an electrolytic ozone water generating apparatus that is mainly used for medical purposes.

In recent years, it has been known that ozone water has been used for a wide range of applications from the food industry / agriculture to the purification of cultivated fisheries and seawater, and the effects of clean bactericidal properties and increased activity on living organisms have become well known. Even in the medical-related area, researchers have already published reports every year that they have begun to spread to applications such as hand-washing sterilization and endoscope sterilization, and are useful for treatment in many medical fields.
Currently, the production methods of ozone water that are widely used for industrial use are broadly divided into gas dissolution methods that dissolve in ozone gas generated by discharge, electrolytic gas dissolution methods that dissolve ozone gas generated by electrolysis in water, and raw water directly on the electrolytic surface. Three methods of direct electrolysis (for example, refer patent document 1) which make ozone water by making it contact are utilized.
Especially recently, the direct electrolysis method is smaller and more economical than other gas dissolution methods, and there is no risk of leakage of high-concentration gas. To the agricultural sector.
JP-A-8-134678

By the way, the method of using platinum as an anode catalyst as in the above-mentioned conventional method is that the raw material water is natural water such as tap water or groundwater or water that has been softened to reduce the amount of calcium or magnesium. Since it is electrolyte water mixed with electrolyte, it has conductivity. For this reason, such electrolyte water tends to cause electrolysis on the anode electrolysis surface, and hydrogen rapidly moves through the ion exchange membrane to the cathode, so that ozone is generated at the anode.
On the other hand, when water having low conductivity such as pure water or purified water is used as the raw material water, the electrolysis current hardly flows because the conductivity at the anode electrolysis surface is low. Even if a higher voltage was applied to increase the current value, oxygen was generated at the anode, but a very small amount of ozone was observed.
Therefore, the inventors have further pursued this phenomenon, and when the cathode electrode is brought into contact with highly conductive saline solution or a citric acid aqueous solution having a cleaning action on the cathode, it is constituted by an anode-ion exchange membrane-cathode. It has been found that the value of the current flowing through the electrolysis system has increased rapidly, and even when pure water or highly purified water with high electrical insulation is supplied to the anode, active electrolysis is induced at the anode and ozone is also actively generated. It was. And it is beginning to use this as a cathodic water method for uses such as sterilization and deodorization.
However, in the above cathode water method, since the cathode water is continuously in contact with the hydrogen generation surface of the cathode, the cathode water is acidified as the operation is repeated, and a small amount of components passing through the system is accumulated, and the operation time is increased. Each time there was a problem that the cathode water needs to be discarded or replaced

  This invention is made | formed in view of the said situation, and it aims at providing the ozone water production | generation apparatus which can produce | generate ozone water easily, without requiring disposal and replacement | exchange of cathode water.

In order to solve the above-mentioned problem, the invention of claim 1 is configured such that, for example, as shown in FIGS. 1 and 2, an anode electrode 22 is pressed against one surface of a cation exchange membrane 21 and a cathode electrode 23 is bonded to the other surface. In an ozone water generating apparatus 100 that includes a catalyst electrode 2 formed by pressure-contacting, bringing purified water into contact with the anode electrode, and generating ozone water by applying a direct current between the anode electrode and the cathode electrode ,
Using platinum or platinum-coated metal for the anode electrode, using silver or silver-coated metal having a silver chloride layer for the cathode electrode,
A part of the purified water is supplied to the cathode electrode.

According to the invention of claim 1, platinum or platinum-coated metal is used for the anode electrode, silver or silver-coated metal having a silver chloride layer is used for the cathode electrode, and purified water is brought into contact with the anode electrode, and a part thereof The purified water is electrolyzed at the anode electrode by supplying a direct current between the anode electrode and the cathode electrode, and hydrogen passes through the cation exchange membrane to the cathode electrode quickly. As a result, oxygen as an element is generated at the anode electrode as divalent oxygen gas and trivalent ozone. The generated ozone is easily dissolved in purified water and turned into ozone water. Thus, even when purified water with high electrical resistivity is used, it is not necessary to use highly conductive saline solution or citric acid aqueous solution for the cathode electrode, so that it is not necessary to dispose of cathode water or to replace it. And ozone water can be generated easily.
Moreover, since a part of purified water is supplied to a cathode electrode, the balance of the water flow in an anode electrode and a cathode electrode can be adjusted.

The invention of claim 2 is an ozone water generator 100A according to claim 1, for example, as shown in FIGS.
The catalyst electrode 2A is disposed in a water tank 1A filled with the purified water,
A swirling water flow generating means (for example, a rotor 6A and a magnet stirrer 7A) for generating a swirling water flow in the water tank and continuously bringing purified water into contact with the catalyst electrode is provided.

  According to the second aspect of the present invention, the catalyst electrode is disposed in the water tank, and the swirling water flow generating means for continuously contacting the purified water with the catalyst electrode is provided. Since the anode electrode faces the swirling water flow, it collides with the anode electrode due to the centrifugal force of the swirling water flow to generate a fine vortex, and the ozone bubbles generated from the anode electrode are entrained in the purified water. Can be dissolved. Therefore, the dissolution efficiency of ozone bubbles in purified water can be improved. In addition, by disposing the catalyst electrode in the water tank, it is possible to secure a sufficient dissolution time for the ozone bubbles to dissolve in the purified water, and also in this respect, the dissolution efficiency can be improved.

The invention of claim 3 is, for example, as shown in FIG. 8, in the ozone water generating apparatus 100 </ b> B according to claim 1,
The catalyst electrode is disposed in a water tank filled with the purified water,
Purified water in the water tank is sucked and pressurized, and sprayed onto the anode electrode of the catalyst electrode.

  According to the invention of claim 3, the catalyst electrode is disposed in the water tank, and the purified water is sucked and pressurized and sprayed onto the anode electrode, so that the ozone bubbles generated from the anode electrode are surely dissolved in the sprayed purified water. Can be made. Therefore, the dissolution efficiency of ozone bubbles in purified water can be improved. Further, by disposing the catalyst electrode in the water tank, it is possible to secure a sufficient dissolution time for the ozone bubbles to dissolve in the purified water, and in this respect also, the dissolution efficiency can be improved.

  According to the ozone water generator according to the present invention, ozone water can be easily generated using purified water having a high electrical resistivity without requiring disposal or replacement of cathode water. As a result, ozone water can be widely used in medical industry, food industry, agriculture and the like for sterilization and cleaning.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an ozone water generation apparatus 100 according to the first embodiment of the present invention, and FIG. 2 is a plan sectional view of the ozone water generation apparatus 100.
As shown in FIGS. 1 and 2, an ozone water generating apparatus 100 according to the present invention is configured by arranging a catalyst electrode 2 in a water tank 1 in which purified water is flowed as needed. Is a device that generates ozone water by generating ozone bubbles and dissolving the ozone bubbles in water.
The water tank 1 is a substantially box-like body having a substantially T shape in a plan view, and has a protruding portion 11 with a part of a side surface extending in the longitudinal direction protruding outward. An inflow pipe 41 for allowing purified water to flow into the aquarium 1 is attached to one end surface in the short direction of the aquarium 1, and the ozone water generated by reaction in the aquarium 1 flows out to the other end surface. A tube 42 is attached.

The inflow pipe 41 is connected to a purified water storage tank (not shown) in which purified water is stored via a pump (not shown). The outflow pipe 42 is connected to an ozone water storage tank (not shown) for storing ozone water generated in the water tank 1 via a pump (not shown).
The water tank 1 is filled with purified water up to the vicinity of the upper end thereof by the inflow pipe 41 and the outflow pipe 42, and purified water is occasionally added from one end side to the other end side in the lateral direction of the water tank 1. Being washed away.
A catalyst electrode 2 is disposed along the inner wall surface 11 a of the water tank 1 at the bottom of the protruding portion 11 of the water tank 1.

The catalyst electrode 2 has an anode electrode 22 in close contact with one surface of the cation exchange membrane 21 and a cathode electrode 23 in close contact with the other surface. The longitudinal direction in which the surface of the cathode electrode 23 forms the protruding portion 11. The anode electrode 22 is disposed so that the surface of the anode electrode 22 faces toward the inner wall surface 11b facing the inner wall surface 11a. By arranging the catalyst electrode 2 in this way, the first flow path 31 in which most of the purified water that has flowed into the water tank 1 from the inflow pipe 41 flows in continuous contact with the surface of the anode electrode 22, and the inflow pipe 13. A portion of the purified water that has flowed into the water tank 1 branches from the cathode electrode 23 surface and the inner wall surface 11a in the longitudinal direction forming the protruding portion 11 and flows in continuous contact with the cathode electrode 23 surface. The flow path 32 is partitioned.
An output terminal 24 of a power supply device (not shown) is electrically connected between the anode electrode 22 and the cathode electrode 23 so that a DC voltage is applied. That is, the anode electrode 22 and the cathode electrode 23 are connected to the power supply device through the conductive wires to the electrodes 22 and 23. The DC voltage to be applied is preferably 6 to 15 volts, for example.

  As the cation exchange membrane 21, a conventionally known one can be used, and a fluorine-based cation exchange membrane having a high durability against the generated ozone can be used. For example, a thickness of 200 to 300 microns is preferable.

  The anode electrode 22 and the cathode electrode 23 are not closely attached so as to completely cover the cation exchange membrane 21, but a large number of through holes are provided so that the anode electrode 22 and the cathode electrode 23 are cation exchanged. The film 21 is overlapped with a contact portion and a non-contact portion. That is, the anode electrode 22 and the cathode electrode 23 have a grating shape or a punching metal shape. FIG. 2 shows the case of grating. In particular, the cathode electrode 23 is formed to have a coarser mesh than the anode electrode 22. Specifically, the grating shape is a lattice shape in which wires are welded, and the punching metal shape is a porous plate shape in which a large number of through holes are formed in a metal plate.

A metal having an ozone generation catalytic function is used as the anode electrode 22, and lead dioxide is the most widely known metal. However, this lead dioxide is difficult to process and uses a porous body with irregularly small pores, but the lead dioxide porous body is fragile and inferior in durability, and lead elutes into ozone water. Therefore, in order to obtain pure ozone water, it is preferable to use a platinum or platinum-coated metal electrode, and in the present invention, it is particularly preferable to use a metal in which titanium is coated with platinum.
On the other hand, as the cathode electrode 23, silver having a silver chloride layer or a silver-coated metal is used. Silver chloride is also used as a reference electrode for ozone measurement, and can stably maintain the cathode potential without toxicity and can stably generate ozone at the anode electrode 22.
The anode electrode 22 is preferably processed from a planar metal into a grating shape. Moreover, as a coating process, it can carry out by plating, heat deposition, etc., for example.

  By using the grating-like anode electrode 22 as described above, the intersection P of the members constituting the anode electrode 22 is pointed and protrudes to the outer surface to generate a vortex in contact with the water flow. Bubbles can be involved to accelerate dissolution.

  In the case of a punched metal electrode, since the porous plate is substantially planar, water parallel to the porous plate hardly flows through the porous plate. It is more preferable to use them together.

  The cation exchange membrane 21, the anode electrode 22, and the cathode electrode 23 are each formed in a plate shape, and after being brought into close contact with each other, the catalyst is bonded by an insulating bonding member (not shown). The electrode 2 is used. Further, as a method of fixing the catalyst electrode 2 to the water tank 1, for example, a rod-shaped attachment member (not shown) is provided at a predetermined position from the inner wall surface 11a of the protruding portion 11 of the water tank 1 toward the cathode electrode 23. You may fix so that it may support. The mounting member used here is preferably made of an ozone-resistant material. In addition, the catalyst electrode 2 may be directly fixed to the bottom surface of the water tank 1, and is not particularly limited.

Moreover, although not shown in FIG.1 and FIG.2, as shown in FIG. 5, the ozone water production | generation apparatus 100 has 5A of concentration detectors which detect the ozone concentration in the water tank 1, and a catalyst electrode based on the detected ozone concentration. 2 is provided with an energization control means (not shown) for controlling energization to 2. The concentration detector 5A includes a detection electrode 51A, a comparison electrode 52A that serves as a reference for potential measurement, a potentiometer that is connected to one end of the detection electrode 51A and the comparison electrode 52A, and measures a potential. Therefore, the tip part (the other end part) of the detection electrode 51A and the comparison electrode 52A is immersed in the solution in the water tank 1, and the potential difference between the detection electrode 51A and the comparison electrode 52A due to the ozone concentration change of the detection electrode 51A is detected. Measure the concentration.
As the detection electrode 51A, an electrode made of, for example, platinum or gold is preferably used, and silver / silver chloride is preferably used as the comparison electrode 52A.
The energization control unit (energization control means) of the power supply device controls the voltage between the anode electrode 22 and the cathode electrode 23 so that the ozone concentration detected in this way matches the preset ozone concentration. It is configured.

Next, the operation of the ozone water generator 100 having the above-described configuration will be described.
As shown in FIGS. 1 and 2, the purified water is always kept flowing from the inflow pipe 41 to the outflow pipe 42 to generate a water flow in the water tank 1. Here, the purified water flows through the first flow path 31 and contacts the anode electrode 22 and flows to the outflow pipe 42, and a part of the purified water flows through the second flow path 32 and contacts the cathode electrode 23. To the outflow pipe 42.
A predetermined voltage is applied between the anode electrode 22 and the cathode electrode 23 by driving the power supply device. Here, since the above-described silver chloride is used for the cathode electrode 23, for example, an electric path is formed between the anode electrode 22 and the cathode electrode 23 by energization, and the purified water flowing through the first channel 31 is the anode. By contacting the electrode 22, oxygen and a large amount of ozone are generated on the anode electrode 22, and the generated ozone is dissolved in flowing water to become ozone water. In the cathode electrode 23, purified water flowing through the second flow path 32 comes into contact with the cathode electrode 23 to generate hydrogen.

In addition, since the water flow that flows from the inflow pipe 41 to the outflow pipe 42 is generated in the first flow path 31, the flow direction of the purified water on the anode electrode 22 side changes in a complicated manner due to slight unevenness of the anode electrode 22. . That is, in the anode electrode 22, water seeks a slight gap flow path, flows into and out of the through hole, passes through a complicated labyrinth flow path while changing the direction, and as a result, the water vortexes. It becomes a winding flow, that is, a vortex flow. The vortex flows close to the anode electrode 22 and the water on the surface of the cation exchange membrane 21 is engulfed by the vortex, and the vortex reaches the surface of the cation exchange membrane 21 and reaches the surface of the cation exchange membrane 21. A local flow is induced, and water flows without a stagnation into a slight gap between the anode electrode 22 and the surface of the cation exchange membrane 21.
In this way, purified water passes through a complicated labyrinth-like flow path to ensure the frequency of gas-liquid contact due to stirring force, and the vortex flow is a very narrow gap between the surface of the cation exchange membrane 21, particularly the anode electrode 22. Ozone bubbles generated in the water are quickly taken in and dissolved in water to generate ozone water, and a current flows between the anode electrode 22 and the cation exchange membrane 21 (precisely between the anode electrode 22 and the cathode electrode 23). This will ensure a state where a lot of air flows.
Then, the generated ozone water flows from the first flow path 31 to the outflow pipe 42.

  On the other hand, since a water flow is generated from the inflow pipe 41 to the outflow pipe 42 also in the second flow path 32, the flow of the water flows on the cathode electrode 23 side due to the unevenness of the cathode electrode 23 in the same manner as the anode electrode 22. However, since the electrode is coarser than the anode electrode 22, the flow direction does not change as complicated as the anode electrode 22. Therefore, after the hydrogen bubbles generated at the cathode electrode 23 become a certain size, they are slowly separated from the cathode electrode 23 and rise to the water surface due to the buoyancy, and are released out of the system as hydrogen gas. Alternatively, a part is taken into running water and flows as hydrogen suspension water from the second flow path 32 to the first flow path 31 and mixed with ozone water.

  During energization, the concentration detector 5A simultaneously measures the concentration of the solution in the water tank 1, and the voltage between the anode electrode 22 and the cathode electrode 23 of the power supply device is set so that the ozone concentration becomes a preset ozone concentration. Be controlled.

  In the first embodiment, another channel is formed in the second channel 32 so that the hydrogen generated in the cathode electrode 23 does not flow from the second channel 32 to the first channel 31. And you may comprise so that it may not mix with the ozone water which flows through the 1st flow path 31. FIG.

As described above, according to the first embodiment of the present invention, platinum-coated metal is used for the anode electrode 22, silver chloride is used for the cathode electrode 23, and purified water is supplied from the inflow pipe 41 to the outflow pipe 42 in the water tank 1. The purified water flowing through the first flow path 31 is brought into contact with the anode electrode 22 by flowing constantly in one direction, and a part of the purified water flows through the second flow path 32 and is also supplied to the cathode electrode 23. A direct current is applied between the anode electrode 22 and the cathode electrode 23. As a result, purified water is electrolyzed at the anode electrode 22, hydrogen quickly reaches the cathode electrode 23 through the cation exchange membrane 21, and hydrogen is extracted from water molecules. appear. The generated ozone is easily dissolved in purified water and turned into ozone water. Even when purified water having a high electrical resistivity is used in this way, it is not necessary to use a highly conductive saline solution or citric acid aqueous solution for the cathode electrode 23. Ozone water can be easily generated.
In addition, since the purified water is supplied also to the cathode electrode 23 by flowing a portion of the purified water through the second flow path 32, the balance of the water flow between the anode electrode 22 and the cathode electrode 23 can be adjusted.

Next, a method for generating ozone water using pure water having high electrical resistance such as purified water as a raw material using the above-described ozone water generating apparatus 100 will be described with examples.
[Example]
As an embodiment of the present invention, a protruding portion 11 (between the first channel 31 and the second channel 32) of the water tank 1 as shown in FIGS. 1 and 2 has a width of 30 mm and a length of 100 mm. The catalyst electrode 2 was installed by pressing the anode electrode 22 coated with platinum, the cation exchange membrane naphtho ion 21 made by DuPont, and the silver cathode electrode 23 coated with silver chloride of the same area as the anode electrode 22 for purification. Water was supplied at a rate of 4 L / min on the anode electrode 22 side and purified water at 1 L / min on the cathode electrode 23 side. A direct current is applied between the anode electrode 22 and the cathode electrode 23, and the relationship between the voltage rise and the generated ozone water concentration is shown in FIG.
As shown in FIG. 3, the ozone water concentration is about 1 ppm with a call of about 7.5 V, the current value at that time is 10 A, and the ozone water concentration is 2 ppm with a call of about 9.0 V, at that time The current value was 14A. Furthermore, when the voltage was increased, the concentration became about 3 ppm and 17 A at 10.5 V, and a high concentration of about 4 ppm and 20 A at 12 V and finally 5 ppm and 23 A at 13.5 V was achieved.
A concentration of 4 to 5 ppm is recognized as a necessary concentration for sterilization and surgical affected area washing water for medical use as described above.
As a comparative example, when a conventionally used platinum-coated titanium electrode was replaced with the cathode electrode 23, almost no current flowed at 12 V or less. Therefore, the ozone water concentration was also 0 ppm, and finally it was about 13 A at 12 V, and the ozone water was 0.3 ppm. Further, at 13.5 V, about 5 A and the ozone water showed 0.6 ppm.
From the above results, it can be seen that the effect of the method of generating ozone water using purified water as raw material water is obvious by using silver chloride as the cathode electrode 23 as in the present invention.

[Second Embodiment]
4 is a perspective view of the ozone water generating device 100A according to the second embodiment of the present invention, FIG. 5 is a side sectional view of the ozone water generating device 100A, and FIG. 6 is a plan sectional view of the ozone water generating device 100A. It is.
As shown in FIGS. 4-6, in the ozone water production | generation apparatus 100A in 2nd embodiment of this invention, the water tank 1A different from the water tank 1 of 1st embodiment is used. The water tank 1A of the second embodiment has a substantially cylindrical shape and is filled with purified water up to the vicinity of its upper end. Below the water tank 1A, a catalyst electrode 2A is arranged in an arc along the inner wall surface of the water tank 1A.

The catalyst electrode 2A has an anode electrode 22A in close contact with one surface of the cation exchange membrane 21A and a cathode electrode 23A in close contact with the other surface. The constituent materials of the cation exchange membrane 21A, the anode electrode 22A, and the cathode electrode 23A, etc. are the catalyst electrodes comprising the cation exchange membrane 21, the anode electrode 22, and the cathode electrode 23 of the first embodiment except that they are formed in an arc shape. Since it is the same as 2, its description is omitted.
The arc-shaped catalyst electrode 2A is fixed in the water tank 1A so that the anode electrode 22A is disposed on the center side of the water tank 1A and the cathode electrode 23A is disposed outside.
As a fixing method in the water tank 1A, for example, a rod-shaped attachment member (not shown) may be provided at a predetermined position from the inner wall surface of the water tank 1A toward the cathode electrode 23A, and may be fixed so as to support it. The mounting member used here is preferably made of an ozone-resistant material. In addition, the catalyst electrode 2A may be directly fixed to the bottom surface of the water tank 1A, and is not particularly limited.

Further, the ozone water generating apparatus 100A includes a swirling water flow generating means including a rotor 6A and a stirring device for generating a swirling water flow in the water tank 1A toward the center of the cylinder.
As the stirring device, a magnet stirrer 7A (shown only in FIG. 5) is preferably used. From the device main body 71A, the motor 72A in the device main body 71A, and the magnet 73A connected to the rotating shaft of the motor 72A and rotating. The magnet rotor 6A in the water tank 1A placed on the upper surface of the magnet stirrer 7A can be rotated at a desired rotational speed. Thus, since the stirring device is a non-contact type device that stirs with a magnet, compared with a contact-type device in which a through hole is provided in the bottom of the water tank 1A and the rotor 6A is directly rotated to generate a swirling water flow. In addition, it is not necessary to perform a packing process in the vicinity of the through hole, and the ozone water does not deteriorate due to the packing. As other swirling water flow generating means, an impeller driven by a pump can be used.

The water tank 1A includes the concentration detector 5A described in the first embodiment (shown only in FIG. 5) and energization control means.
Further, as shown in FIG. 7, in the water tank 1A, a hydrogen guiding path 8A for releasing hydrogen generated from the cathode electrode 23A away from the cathode electrode 23A by a swirling water flow to the water surface or outside air may be provided. The hydrogen guiding path 8A is provided with a cylindrical member 81A extending from the upper side of the catalyst electrode 2A to the upper end of the water tank 1A in the water tank 1A, thereby providing a gap between the inner peripheral surface of the water tank 1A and the cylindrical member 81A. To form. By providing the hydrogen induction path 8A in this way, hydrogen bubbles generated from the cathode electrode 23A can be discharged to the water surface or the outside air through the hydrogen induction path 8A. The cylindrical member 81A may be fixed to the water tank 1A by, for example, a structure in which the cylindrical member 81A is suspended from above, or a rod-like member that supports the cylindrical member 81A by sandwiching the cylindrical member 81A on the inner surface of the water tank 1A. It is good also as a structure to provide and fix, and it does not specifically limit. In FIG. 7, the same components as those in FIG.

Next, the operation of the ozone water generator 100A having the above-described configuration will be described.
First, the water tank 1A is filled with purified water and the agitator is driven to rotate the rotor 6A to generate a swirling water flow at a constant speed in the water tank 1A.
Then, a predetermined voltage is applied between the anode electrode 22A and the cathode electrode 23A by driving the power supply device. Here, since silver chloride is used for the cathode electrode 23A, an electric path is formed between the anode electrode 22A and the cathode electrode 23A by energization, and the purified water swirling around the center side in the water tank 1A is used as the anode electrode. By contacting 22A, oxygen and a large amount of ozone are generated on the anode electrode 22A, and the generated ozone is dissolved in the swirling water stream to be turned into ozone water. In the cathode electrode 23A, hydrogen is generated by the purified water rotating around the inner wall surface in the water tank 1A coming into contact with the cathode electrode 23A.

  Similarly to the first embodiment, the swirling water flow causes the flow direction to be complicated due to slight unevenness of the anode electrode 22A on the anode electrode 22A side, and a vortex flow is generated on the surface of the cation exchange membrane 21A. The ozone bubbles are quickly taken in and dissolved in the water to generate ozone water, thereby securing a state in which a large amount of current flows between the anode electrode 22A and the cation exchange membrane 21A.

  On the other hand, although the flow direction changes due to the unevenness of the cathode electrode 23A on the cathode electrode 22A side, the flow direction is not as complicated as the anode electrode 22A because it is a coarser electrode than the anode electrode 22A. After the hydrogen bubbles generated in 23A become a certain size, they are slowly separated from the cathode electrode 23A and lifted to the water surface by the buoyancy and released as hydrogen gas outside the system, or a part of them It is taken into running water and mixed with ozone water as hydrogen suspension water.

  During energization, the concentration detector 5A simultaneously measures the concentration of the solution in the water tank 1A, and the voltage between the anode electrode 22A and the cathode electrode 23A of the power supply device is set so that the ozone concentration becomes a preset ozone concentration. Be controlled.

As described above, according to the second embodiment of the present invention, platinum-coated metal is used for the anode electrode 22A, silver chloride is used for the cathode electrode 23A, and the catalyst electrode 2A is used in the water tank 1A. The cathode electrode 23A is arranged so as to face the center of the cylinder and face the inner peripheral surface of the cylinder, and the swirling water flow is generated by the swirling water flow generating means so as to continuously contact the anode electrode 22A. Deliver. A direct current is applied between the anode electrode 22A and the cathode electrode 23A. As a result, purified water is electrolyzed at the anode electrode 22A, hydrogen quickly reaches the cathode electrode 23A through the cation exchange membrane 21A, and hydrogen is extracted from the water molecules. As a result, oxygen and ozone are absorbed at the anode electrode 22A. appear. The generated ozone is easily dissolved in purified water and turned into ozone water. Even when purified water having a high electrical resistivity is used as described above, it is possible to save the trouble of discarding and replacing the cathode water as in the prior art, and to easily generate ozone water.
Further, the swirling water flow generating means having the magnet stirrer 7A and the rotor 6A improves the contact between the catalyst electrode 2A and the swirling water flow, and the anode electrode 22A faces the swirling water flow because it faces the center of the cylinder. A fine vortex is generated by colliding with the anode electrode 22A by force, and ozone bubbles generated from the anode electrode 22A can be entrained therein and dissolved in purified water. Therefore, the dissolution efficiency of ozone bubbles in purified water can be improved. In addition, by disposing the catalyst electrode 2A in the water tank 1A, it is possible to secure a sufficient dissolution time for the ozone bubbles to dissolve in the purified water, and also in this respect, the dissolution efficiency can be improved.

[Third embodiment]
FIG. 8 is a plan sectional view of an ozone water generator 100B according to the third embodiment of the present invention.
In the ozone water generating apparatus 100B according to the third embodiment of the present invention, a substantially cylindrical water tank 1A similar to the water tank 1A used in the ozone water generating apparatus 100A according to the second embodiment is used, and an arc-shaped water tank 1A is used. The catalyst electrode 2A is disposed in the water tank 1A so that the anode electrode 22A faces the center of the water tank 1A and the cathode electrode 23A faces the outside. Since these structures are the same as those of the second embodiment, the same components are denoted by the same reference numerals and the description thereof is omitted.
In the third embodiment, a suction tube 91B having a suction port for sucking purified water in the water tank 1A, a spray tube 92B having a spray port for spraying purified water to the catalyst electrode 2A, and these suction tubes 91B and a circulation pump 93B that is connected to the spray pipe 92B and pressurizes purified water.
Furthermore, a guide vane 94B for guiding purified water sprayed from the spray pipe 92B to the anode electrode 22A is provided in the water tank 1A. The guide vane 94B has a plate shape formed in an arc shape, and is arranged to extend from the inner wall surface in the vicinity of the spray pipe 92B in the water tank 1A to the anode electrode 22A. A slight gap is provided between the tip of the guide vane 94B and one end of the catalyst electrode 2A, and a part of the purified water sprayed from the spray tube 92B also flows on the cathode electrode 23A surface side. ing. By adopting such a configuration, dissolution of the generated ozone in purified water can be promoted.

Next, the operation of the ozone water generator 100B having the above-described configuration will be described.
First, the water tank 1A is filled with purified water, the purified water is sucked from the suction pipe 91B, and pressurized by the circulation pump 93B, whereby the purified water is sprayed from the spray pipe 92B to the anode electrode 22A. Here, the purified water sprayed from the spray pipe 92B is guided by the guide vane 94B, contacts the anode electrode 22A, rotates around the center in the water tank 1A, and part of the purified water is guided by the guide vane 94B and the catalyst. It flows through the flow path between the cathode electrode 23A and the inner wall surface of the water tank 1A from the gap between the electrode 2A, contacts the cathode electrode 23A, and similarly turns around the center in the water tank 1A.
Then, a predetermined voltage is applied between the anode electrode 22A and the cathode electrode 23A by driving the power supply device. Here, since silver chloride is used for the cathode electrode 23A, an electric path is formed between the anode electrode 22A and the cathode electrode 23A by energization, and the purified water swirling around the center side in the water tank 1A is used as the anode electrode. By contacting 22A, oxygen and a large amount of ozone are generated on the anode electrode 22A, and the generated ozone is dissolved in the swirling water stream to be turned into ozone water. In the cathode electrode 23A, hydrogen is generated by the purified water rotating around the inner wall surface in the water tank 1A coming into contact with the cathode electrode 23A.

  Similarly to the first embodiment, the swirling water flow causes the flow direction to be complicated due to slight unevenness of the anode electrode 22A on the anode electrode 22A side, and a vortex flow is generated on the surface of the cation exchange membrane 21A. The ozone bubbles are quickly taken in and dissolved in the water to generate ozone water, thereby securing a state in which a large amount of current flows between the anode electrode 22A and the cation exchange membrane 21A.

  On the other hand, the direction of the flow also changes on the side of the cathode electrode 23A due to the unevenness of the cathode electrode 23A, but since the electrode is coarser than the anode electrode 22A, the direction of the flow does not change as complicated as the anode electrode 22A. After the hydrogen bubbles generated in 23A become a certain size, they are slowly separated from the cathode electrode 23A and lifted to the water surface by the buoyancy and released as hydrogen gas outside the system, or a part of them It is taken into running water and mixed with ozone water as hydrogen suspension water.

  During energization, the concentration detector 5A (not shown in FIG. 8) simultaneously measures the concentration of the solution in the water tank 1A, and the anode electrode 22A of the power supply device and the ozone concentration are set so that the ozone concentration becomes a preset ozone concentration. The voltage between the cathode electrodes 23A is controlled.

As described above, according to the third embodiment of the present invention, the suction pipe 91B that sucks purified water into the water tank 1A and the spray pipe 92B that pressurizes the sucked purified water with the circulation pump 93B and sprays it onto the anode electrode 22A. Since it is provided, ozone bubbles generated from the anode electrode 22A can be reliably dissolved in the sprayed purified water. Therefore, the dissolution efficiency of ozone bubbles in purified water can be improved. In addition, by disposing the catalyst electrode 2A in the water tank 1A, it is possible to secure a sufficient dissolution time for the ozone bubbles to dissolve in the purified water, and also in this respect, the dissolution efficiency can be improved.
Furthermore, since the guide vane 94A is provided in the water tank 1A, purified water can be effectively sprayed onto the catalyst electrode 2A along the guide vane 94A.
Moreover, the same effect can be acquired about the component similar to 2nd embodiment.

In addition, the 1st-3rd embodiment of this invention is not limited to the said embodiment, Unless it changes the summary, it can change suitably.
For example, although the water tank 1A of the second and third embodiments is a cylindrical shape formed so as to have substantially the same diameter, it may be a quadrangular prism shape.
In addition, although the anode electrodes 22 and 22A and the cathode electrodes 23 and 23A are formed in a grating shape or a punching metal shape, they may be plate-shaped. Further, a metal net such as a lath net may be provided on the surfaces of the anode electrodes 22 and 22A. By providing the wire mesh in this manner, the swirling water flow is further disturbed, and ozone water can be quickly dissolved in the raw water to generate ozone water.

It is a perspective view of ozone water generating device 100 in a first embodiment of the present invention. 2 is a plan sectional view of the ozone water generator 100. FIG. It is the graph which showed the relationship between an applied voltage and the production | generation ozone water density | concentration. It is a perspective view of ozone water generating device 100A in a second embodiment of the present invention. It is a sectional side view of ozone water generating apparatus 100A. It is a plane sectional view of ozone water generating device 100A. It is a plane sectional view of ozone water generating device 100A provided with hydrogen induction way 8A. It is a plane sectional view of ozone water generating device 100B in a third embodiment of the present invention.

Explanation of symbols

1,1A water tank 2,2A catalyst electrode 6A rotor (swirl water flow generating means)
7A Magnet Stirrer (Swirl water flow generating means)
21, 21A Cation exchange membrane 22, 22A Anode electrode 23, 23A Cathode electrode 100, 100A, 100B Ozone water generator

Claims (3)

A catalyst electrode is formed by pressing an anode electrode on one surface of a cation exchange membrane and pressing a cathode electrode on the other surface, and purified water is brought into contact with the anode electrode, and the anode electrode, the cathode electrode, In the ozone water generator that generates ozone water by applying a direct current between
Using platinum or platinum-coated metal for the anode electrode, using silver or silver-coated metal having a silver chloride layer for the cathode electrode,
A device for generating ozone water, wherein a part of the purified water is supplied to the cathode electrode. The catalyst electrode is disposed in a water tank filled with the purified water,
2. The ozone water generating device according to claim 1, further comprising a swirling water flow generating means for generating a swirling water flow in the water tank and continuously contacting purified water with the catalyst electrode. The catalyst electrode is disposed in a water tank filled with the purified water,
2. The ozone water generation apparatus according to claim 1, wherein purified water in the water tank is sucked and pressurized and sprayed to the anode electrode of the catalyst electrode.

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