JP2002273428A - Electrolytic water generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolytic water generator capable of generating a large amount of a cathode water which has a high dissolved hydrogen concentration and is free from excessive rising of pH by using the principle of a bipolar ion exchange membrane. SOLUTION: The generator is provided with an electrolytic bath 1 provided with a cathode chamber 7 is which a cathode 2 is arranged, an anode chamber 8 in which an anode 3 is arranged and a barrier membrane 4 arranged so as to separate the chamber 7 and the chamber 8. The membrane 4 consists of a cation-exchange membrane 5 and an anionic-exchange membrane 6 arranged so as to face each other. The membrane 4 is disposed so as to arranged the membrane 5 on the side of the chamber 7 and the membrane 6 on the side of the chamber 8. A mechanism for increasing the flow-out rate of the cathode water from the chamber 7 higher than that of the anode water from the chamber 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolyzed water generator for continuously generating electrolyzed water by electrolysis.

[0002]

2. Description of the Related Art Conventionally, there has been proposed an electrolyzed water generating apparatus for generating electrolyzed water by electrolysis of water, as disclosed in Japanese Patent Application Laid-Open No. 55-1822. Such an electrolyzed water generating apparatus includes an electrolytic cell partitioned by a diaphragm into a cathode chamber and an anode chamber. A cathode is provided in the cathode chamber, and an anode is provided in the anode chamber. Tap water, which is generally used as raw water, is introduced into each electrode chamber of such an electrolytic cell, and when a voltage is applied between the electrodes, ionic species, gas components, active species, and the like are generated in the raw water, and the electrolytic water is used. Is prepared, and such electrolyzed water can be discharged from the electrolytic cell and used. When supplying raw water to the electrolytic cell, raw water may be supplied directly to the electrolytic cell.However, an adsorption removing section filled with activated carbon or the like or a filtering section provided with a hollow fiber membrane or the like is used. There is also a method in which impurities in water are removed by passing the solution, and then the solution is supplied to an electrolytic cell.

[0003] In such an electrolyzed water generating apparatus, hydrogen ions and oxygen are generally generated on the anode surface and hydroxide ions and hydrogen are generated on the cathode surface due to the electrolysis reaction of water in the electrolytic cell. In the anode compartment, hydrogen ion-rich acidic oxygen-dissolved water is produced as anode water, while in the cathode compartment, hydroxide ion-rich alkaline hydrogen-dissolved water is produced as cathode water.

[0004] Further, as a diaphragm provided in the electrolytic cell,
Although an electrically neutral porous membrane mainly composed of a nonwoven fabric or the like was used, the use of an ion exchange membrane such as an anion exchange membrane or a cation exchange membrane allows a specific space between the cathode chamber and the anode chamber to be obtained. In some cases, a desired electrolyzed water is obtained by inhibiting the movement of ions.

[0005] Of the electrolyzed water generated by the above electrolyzed water generator, the anolyte water generated in the anode chamber is used for sterilizing water and face wash water, and the cathodic water generated in the cathode chamber is used for drinking. , It can be expected to have an effect of improving abnormal gastrointestinal fermentation, chronic diarrhea, excessive gastric acid and the like. Among them, the effectiveness of the cathode water has been conventionally evaluated based on the pH, and various methods have been proposed in the conventional electrolyzed water generator with a focus on how to efficiently adjust the pH of the cathode water. But
In recent years, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-218270, hydrogen molecules dissolved in cathodic water (hereinafter referred to as “dissolved hydrogen”) are supersaturated to generate hydrogen gas particles in cathodic water. Techniques for preparing highly effective cathodic water have been proposed, and in addition to being presented in this publication, dissolved hydrogen in cathodic water is a major factor in expressing the effectiveness of cathodic water. The idea to spread is spreading. Furthermore, cathodic water used for drinking is usually used more frequently than anodic water, and cathodic water is required to be generated in a larger amount than anodic water. There has been an increasing demand for an electrolyzed water generator capable of generating a large amount of cathode water having a high water content.

[0006]

However, when the degree of electrolysis in the electrolytic cell is increased in order to increase the concentration of dissolved hydrogen in the cathode water generated in the cathode chamber of the electrolyzed water generating apparatus, the degree of electrolysis in the cathode water is accordingly increased. There was a risk that the hydroxide ion concentration would increase and the pH of the cathode water would become unsuitable for drinking. Further, the increase in the pH of the cathode water also causes a problem of trihalomethane generation in the cathode water. This trihalomethane is generated by a haloform reaction when chlorine or hypochlorite ion or the like generated in the anode chamber is mixed into the cathode chamber through the diaphragm.
Since the production of trihalomethane is promoted by hydroxide ions, the higher the pH of the cathode water, the higher the possibility of the production of trihalomethane.

On the other hand, as described above, in the conventional electrolyzed water generator, any one of a neutral membrane, a cation exchange membrane, and an anion exchange membrane is used as a membrane. There are also bipolar ion exchange membranes that combine a cation exchange membrane and an anion exchange membrane. This bipolar ion exchange membrane was announced around 1956 (V.
F. Frillette, J. et al. Phys. Chem. , 6
0,435,1956, and Japanese Patent Publication No. 32-3962). Such bipolar ion exchange membranes are mainly used in industrial electrolysis processes for obtaining acids and bases from inorganic salts. One example is shown in FIG.

The bipolar ion exchange membrane 40 is formed by bonding the cation exchange membrane 5 and the anion exchange membrane 6 with an adhesive 21. When a voltage is applied between the electrodes and the aqueous solution is electrolyzed such that the ion exchange membrane 5 is disposed on the cathode 23 side and the anion exchange membrane 6 is disposed on the anode 22 side, the bipolar ion exchange membrane 40 is formed. Hydrogen ions generated by dissociation of water between the constituent anion exchange membrane 6 and cation exchange membrane 5 move through the cation exchange membrane 5 to the cathode 23 side, and are also generated by dissociation of water. A phenomenon occurs in which hydroxide ions pass through the anion exchange membrane 6 and move to the anode 22 side. In the example shown in FIG. 11, an acid and a base are generated from an inorganic salt using the operation of the bipolar ion exchange membrane 40.

In the illustrated example, a first bipolar ion exchange membrane 4 is provided between an anode 22 and a cathode 23 facing each other in an electrolytic cell 1.
0a, an anion exchange membrane 24, a cation exchange membrane 25, and a second bipolar ion exchange membrane 40b are arranged in this order. Each of the bipolar ion exchange membranes 40a and 40b is an anion exchange membrane 6
The side is arranged on the anode 22 side. At this time, the anode chamber 26 is closer to the anode 22 than the first bipolar ion exchange membrane 40a, and the acid generation chamber 27 is located between the first bipolar ion exchange membrane 40a and the anion exchange membrane 24. The desalting chamber 28 is between the cation exchange membrane 24 and the cation exchange membrane 25, and the base generation chamber 2 is between the cation exchange membrane 25 and the second bipolar ion exchange membrane 40b.
9. The cathode 23 side is formed as the cathode chamber 30 with respect to the second bipolar ion exchange membrane 40b.

In the electrolysis step, the desalting chamber 28 is_Two
SO_FourThe solution is supplied, and the cathode 23 and the anode 22 are
When a voltage is applied in between, Na⁺But
Move to the cathode 23 side and SO_Four ^2-Moves to the anode 22 side.
Move. At this time, SO_Four ^2-First, the anion exchange membrane 24
Pass through to the acid generation chamber 27, where the first bipolar ion
Since it cannot pass through the exchange membrane 40a,
Stay at 27. At this time,⁺Has an anion exchange membrane 24
Since it cannot pass, it does not move to the acid generation chamber 27.
No. In the first bipolar ion exchange membrane 40a,
An anion exchange membrane 6 constituting the polar ion exchange membrane 40a;
Produced by dissociation of water with the cation exchange membrane 5
Hydrogen ions move to the acid generation chamber 27, and thus
H at 27 _TwoSO_FourAn aqueous solution forms. Meanwhile, desalination room
Na in 28⁺First pass through the cation exchange membrane 25
It moves to the base generation chamber 29, but it has a second bipolar ion exchange membrane.
Since 40b cannot pass through, the base generation chamber 29 is left as it is.
stay. At this time, SO_Four ^2-Passes through the cation exchange membrane 25
Since it cannot be performed, it does not move to the base generation chamber 29.
In the second bipolar ion exchange membrane 40b, the bipolar
The anion exchange membrane 6 constituting the ion exchange membrane 40b and the positive
Hydroxyl generated by dissociation of water with on-exchange membrane 5
The chloride ions move to the base generation chamber 29, and
In the forming chamber 29, an aqueous NaOH solution is generated.

As described above, the bipolar ion exchange membrane 40 is mainly used as a diaphragm for separating hydrogen ions and hydroxide ions generated by dissociation of water in an industrial electrolysis process. The principle of such a bipolar ion exchange membrane 40 is applied to an electrolyzed water generation process in an electrolyzed water generation apparatus to suppress an increase in the pH of cathode water.

That is, the present invention utilizes the principle of a bipolar ion-exchange membrane to produce a large amount of cathodic water having a high dissolved hydrogen concentration and without an excessive increase in pH. It is intended to provide a device.

[0013]

According to a first aspect of the present invention, there is provided an electrolyzed water generating apparatus comprising: a cathode chamber in which a cathode is disposed; an anode chamber in which an anode is disposed; And an anode chamber 8 provided with a diaphragm 4 provided so as to separate the anode water from the anode chamber 8. An electrolyzed water generating apparatus for generating water, wherein a cation exchange membrane 5 and an anion exchange membrane 6 which are disposed to face each other constitute a diaphragm 4, and the diaphragm 4 is formed of a cation exchange membrane 5 Is disposed on the cathode chamber 7 side and the anion exchange membrane 6 is disposed on the anode chamber 8 side, and the amount of cathode water flowing out of the cathode chamber 7 is calculated based on the amount of anode water flowing out of the anode chamber 8. Is also provided with a mechanism for increasing the pressure.

According to a second aspect of the present invention, in the first aspect, the sectional area of the cathode chamber supply path 9 for supplying raw water to the cathode chamber 7 is larger than the sectional area of the anode chamber supply path 10 for supplying raw water to the anode chamber 8. And the cross-sectional area of the cathode water discharge channel 12 for discharging the cathode water from the cathode chamber 7 is equal to or larger than the cross-sectional area of the anode water discharge channel 13 for discharging the anode water from the anode chamber 8. Characterized in that the sum of the cross-sectional areas of the chamber supply passage 9 and the cathode water discharge passage 12 is larger than the sum of the cross-sectional areas of the anode room supply passage 10 and the anode water discharge passage 13. It is.

According to a third aspect of the present invention, in the first aspect, of the anode chamber supply passage 10 for supplying raw water to the anode chamber 8 and the anode water discharge passage 13 for discharging anode water from the anode chamber 8, A flow control valve 16 is provided at least on one side.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the cross-sectional area of the water path in the cathode chamber 7 is larger than the cross-sectional area of the water path in the anode chamber 8. It is characterized by being formed as described above.

Further, according to a fifth aspect of the present invention, there is provided an electrolyzed water generating apparatus, comprising: a cathode chamber 7 in which the cathode 2 is provided; an anode 3; and a diaphragm provided so as to separate the cathode chamber 7 from the anode 3. And an electrolyzed water generating apparatus for generating electrolyzed water from raw water by diaphragm electrolysis in the electrolyzer 1, comprising a cation exchange membrane 5 disposed so as to face each other.
And an anion exchange membrane 6, and the diaphragm 4 is disposed such that the cation exchange membrane 5 is disposed on the cathode chamber 7 side and the anion exchange membrane 6 is disposed on the anode 3 side. The electrolytic cell supply path 11 for supplying raw water to the cell 1 is connected only to the cathode chamber 7, and the electrolytic water generated in the electrolytic cell 1 is discharged from the electrolytic cell 1 as a flow path for discharging the electrolytic water from the electrolytic cell 1. Characterized in that only the cathode water discharge channel 12 for discharging the cathode water is provided.

According to a sixth aspect of the present invention, in the fifth aspect, the anode 3 is provided by carrying a conductor on the surface of the anion exchange membrane 6 opposite to the side on which the cation exchange membrane 5 is disposed. Is constituted.

According to a seventh aspect of the present invention, in the sixth aspect, a coating film made of a conductor is formed on the surface of the anion exchange membrane 6 opposite to the side on which the cation exchange membrane 5 is disposed. Thus, the anode 3 is constituted.

According to an eighth aspect of the present invention, in the sixth aspect, a conductive film is formed by plating on the surface of the anion exchange membrane 6 opposite to the side on which the cation exchange membrane 5 is disposed. The anode 3 is constituted by:

A ninth aspect of the present invention is characterized in that, in any one of the first to eighth aspects, an insoluble metal is used as a conductor constituting the anode 3.

According to a tenth aspect of the present invention, the anion exchange membrane 6 constituting the diaphragm 4 according to any one of the first to ninth aspects.
And the cation exchange membrane 5 is rigidly held with respect to the electrolytic cell 1.

An eleventh aspect of the present invention is characterized in that, in the tenth aspect, the edges of the anion exchange membrane 6 and the cation exchange membrane 5 are held by a rigid body.

Further, the invention of claim 12 is the invention of claims 1 to 1
In any one of (1) and (2), a discharge mechanism for discharging gas generated on the surface of the anode 3 to the outside of the electrolytic cell 1 is provided.

A thirteenth aspect of the present invention is characterized in that, in the twelfth aspect, the discharge mechanism is constituted by forming the anode 3 as a porous body.

A fourteenth aspect of the present invention is characterized in that, in the twelfth aspect, the discharge mechanism is constituted by forming the anode 3 in a mesh shape.

Further, the invention of claim 15 provides the invention according to claims 1 to 1
4, the cation exchange membrane 5 and the anion exchange membrane 6 that constitute the diaphragm 4 are joined by an adhesive 21 to form the diaphragm 4 as a bipolar ion exchange membrane 40. It is assumed that.

[0028] The invention of claim 16 is the invention of claims 1 to 1
4, wherein the cation exchange membrane 5 and the anion exchange membrane 6 are arranged in contact with each other.

[0029] The invention of claim 17 is the first to first aspects of the present invention.
6, an electrolyte supply device 14 for adding an electrolytic auxiliary agent comprising an inorganic calcium agent, an organic calcium agent or a mixture thereof to raw water supplied to the electrolytic cell 1.
It is characterized by comprising.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the principle of suppressing an increase in the pH of cathode water in the present invention will be described with reference to FIG.

In the present invention, as shown in the figure, a cation exchange membrane 5 and an anion exchange membrane 6 which are arranged to face each other constitute a diaphragm 4, and this diaphragm 4 is formed by the opposed cathode 2 and anode 3 facing each other. Cathode 2
The anode water is generated on the side of the cathode 3 and the anode water on the side of the anode 3.

In this electrolysis process, 2
An electrolytic reaction represented by a reaction formula of H ₂ O + 2e ⁻ → H ₂ + 2OH ⁻ occurs to generate hydrogen and hydroxide ions, while H ₂ O → １ ／ O ₂ + 2H ⁺ + 2e ^{− on the} surface of the anode 3. An electrolytic reaction represented by the following reaction formula occurs to generate oxygen and hydrogen ions. At the same time, in this electrolysis process, hydrogen ions and hydroxide ions are generated by dissociation of water between the cation exchange membrane 5 and the anion exchange membrane 6 constituting the diaphragm 4. Hydrogen ions generated by this dissociation pass through only the cation exchange membrane 5 without passing through the anion exchange membrane 6 and move to the cathode 2 side, while hydroxide ions pass through the cation exchange membrane 5 Instead, it passes through only the anion exchange membrane 6 and moves to the anode 3 side.

For this reason, the hydroxide ions generated on the surface of the cathode 2 are combined with the hydrogen ions transferred to the side of the cathode 2 via the cation exchange membrane 5 to be neutralized. Increase in the concentration of dissolved hydrogen in the cathode water to increase the degree of electrolysis to increase the amount of hydrogen generation and hydroxide ion generation on the surface of the cathode 2 by electrolysis. In addition, the pH value of the cathode water does not rise so that it is not suitable for drinking.

Also on the anode 3 side, hydrogen ions generated on the surface of the anode 3 are neutralized by binding to hydroxide ions transferred to the anode 3 side via the anion exchange membrane 6. Even if the concentration of dissolved hydrogen in the anode water is improved by simultaneously increasing the dissolved hydrogen concentration in the cathode water by increasing the degree of electrolysis, it is possible to suppress the pH value of the anode water from excessively lowering. Things.

Hereinafter, embodiments of the present invention will be described.

The electrolyzed water generator shown in FIG. 1 includes an electrolyzer 1 and an electrolyte supply device.

The electrolytic cell 1 is divided by a diaphragm 4 into a cathode chamber 7 in which the cathode 2 is disposed and an anode chamber 8 in which the anode 3 is disposed. The diaphragm 4 is configured such that the cation exchange membrane 5 and the anion exchange membrane 6 face each other, and the cation exchange membrane 5 is arranged on the cathode chamber 7 side, and the anion exchange membrane 6 is arranged on the anode chamber 8 side. It has become. In the illustrated example, the cation exchange membrane 5
And the anion exchange membrane 6 are opposed to each other with a slight gap. As the anion exchange membrane 6, a membrane having an anion exchanger such as an ammonium group, a sulfonium group, a phosphonium group, or a primary to tertiary amine as a polar group can be used. Is sulfonic acid,
Those having a cation exchanger such as phosphonic acid, sulfate, phosphate, carboxylic acid, and phenolic hydroxyl group as a polar group can be used. The cathode 2 and the anode 3 are disposed so as to face each other along the inner wall of the electrolyzed water generating apparatus. The diaphragm 4 is provided between the cathode 2 and the anode 3 and the cation exchange membrane 5 is connected to the cathode 2. And the anion exchange membrane 6 is disposed so as to face the anode 3 respectively.

The electrolyte supply device 14 is provided with an electrolysis aid comprising an inorganic calcium agent such as calcium chloride or calcium sulfate, an organic calcium agent such as calcium lactate, calcium gluconate or calcium glycerophosphate, or a mixture thereof. An agent is loaded so that an electrolysis auxiliary can be added to raw water passing through the electrolyte supply device 14. As the electrolysis auxiliary, an appropriate electrolyte such as sodium chloride and sodium sulfate can be used in addition to those mentioned above.

A raw water supply passage 15 is provided in the electrolyte supply device 14.
Is connected, and raw water such as tap water is supplied to the electrolyte supply device through the raw water supply passage 15. Although not shown, an adsorption purification section filled with activated carbon or the like or a filtration section provided with a hollow fiber membrane or the like may be provided on the upstream side of the raw water supply flow path. Raw water purified in the filtration section can be used for generation of electrolytic water.

The space between the electrolyte supply device 14 and the electrolytic cell 1 is
The raw water, which is connected by the electrolytic cell supply path 11 and to which the electrolytic auxiliary agent is added by the electrolyte supply device 14, is supplied to the electrolytic cell 1 through the electrolytic cell supply path 11.
At this time, the electrolytic cell supply path 11 is branched into a cathode chamber supply path 9 connected to the cathode chamber 7 and an anode chamber supply path 10 connected to the anode chamber 8 on the downstream side. Raw water is supplied to the anode chamber 7 and the anode chamber 8, respectively. In the electrolytic cell 1, an anode water discharge passage 13 is provided in the anode chamber 8.
Are connected to the cathode chamber 7, and a cathode water discharge channel 12 is connected to the cathode chamber 7. The anode water generated in the anode chamber 8 is discharged through the anode water discharge channel 13 to the outside of the electrolyzed water generator. Cathode water generated in the cathode chamber 7 is discharged to the outside of the electrolyzed water generator through the cathode water discharge channel 12.

In the electrolyzed water generator configured as described above, raw water such as tap water is supplied to the electrolyzed water generator from the upstream side of the raw water supply passage 15 and a voltage is applied between the anode 3 and the cathode 2. Then, first, the raw water flowing through the raw water supply flow path 15 is added with an electrolytic auxiliary in the electrolyte supply device 14 to improve the electric conductivity, and then is supplied through the cathode chamber supply path 9 and the anode chamber supply path 10 to the cathode chamber. The anode water is supplied to the anode water chamber 7 and the anode chamber 8, respectively, and the cathode water is generated by the electrolysis in the cathode chamber 7 and the anode water is generated in the anode chamber 8, respectively.
The anode water is discharged to the outside of the electrolyzed water generator through the cathode water discharge passage 12 through the anode water.

At this time, in the electrolysis process in the electrolytic cell 1, 2H ₂ O + 2e ⁻ → H ₂
The electrolytic reaction represented by the reaction formula of + 2OH ⁻ occurs to generate hydrogen and hydroxide ions, while in the anode chamber 8, the reaction formula of H ₂ O → 1 / 2O ₂ + 2H ⁺ + 2e ⁻ is formed on the surface of the anode 3. The represented electrolytic reaction occurs to generate oxygen and hydrogen ions. At the same time, in this electrolysis process, hydrogen ions and hydroxide ions are generated by dissociation of water between the cation exchange membrane 5 and the anion exchange membrane 6 constituting the diaphragm 4. Hydrogen ions generated by this dissociation pass through only the cation exchange membrane 5 without passing through the anion exchange membrane 6 and are introduced into the cathode chamber 7, while hydroxide ions pass through the cation exchange membrane 5 It passes through only the anion exchange membrane 6 without being introduced into the anode chamber 8.

Thus, in the cathode chamber 7, hydroxide ions generated on the surface of the cathode 2 are combined with hydrogen ions introduced into the cathode chamber 7 through the cation exchange membrane 5 to be neutralized. As a result, an increase in the pH of the cathode water generated in the cathode chamber 7 is suppressed. In order to improve the concentration of dissolved hydrogen in the cathode water, the degree of electrolysis is increased to generate hydrogen in the cathode chamber 7 by electrolysis. Even if the amount and the amount of hydroxide ions generated are increased, the pH value of the cathode water does not rise so that it is not suitable for drinking.

In the anode chamber 8, hydrogen ions generated on the surface of the anode 3 are combined with hydroxide ions introduced into the anode 3 through the anion exchange membrane 6 to be neutralized. Even if the concentration of dissolved hydrogen in the anode water is improved by simultaneously increasing the dissolved hydrogen concentration in the cathode water by increasing the degree of electrolysis, it is possible to suppress the pH value of the anode water from excessively lowering. Things.

Further, even if chlorine or hypochlorite ions are generated in the anode chamber 8, by using the diaphragm 4 composed of the anion exchange membrane 6 and the cation exchange membrane 5 as described above, Chlorine and hypochlorite ions do not move to the cathode chamber 7, and since the rise in pH of the cathode water is suppressed as described above, the generation of trihalomethane by the haloform reaction in the cathode water is suppressed. It is.

Further, although not specifically shown in FIG. 1, the discharge amount of the cathode water from the cathode chamber 7 is made larger than the discharge amount of the anode water from the anode chamber 8 in the electrolyzed water generator. A mechanism is provided so that the amount of cathode water that is frequently used can be increased.
The configuration for this is specifically shown in FIGS.

In the example shown in FIG. 2, the cross-sectional area of the cathode chamber supply passage 9 is formed larger than the cross-sectional area of the anode chamber supply passage 10, and the cross-sectional area of the cathode water discharge passage 12 is
3 is larger than the cross-sectional area. Therefore, the cathode chamber supply passage 9, the cathode chamber 7, and the cathode water discharge passage 12
Pressure loss in the flow path of raw water or cathode water composed of
When the pressure loss in the raw water or anode water flow path composed of the anode chamber supply path 10, the anode chamber 8 and the anode water discharge flow path 13 is compared, the pressure loss in the former is smaller than that in the other. The discharge amount of the cathode water discharged from the channel 12 is larger than the discharge amount of the anode water discharged from the anode water discharge channel 13.

The cross-sectional area of the cathode chamber supply passage 9 is larger than the cross-sectional area of the anode chamber supply passage 10 and the cathode water discharge passage 12
And the cross-sectional area of the anode water discharge passage 13 is the same, or the cross-sectional area of the cathode chamber supply passage 9 and the cross-sectional area of the anode room supply passage 10 are the same, and the cathode water discharge passage Even if the cross-sectional area of the anode water discharge passage 13 is larger than the cross-sectional area of the anode water discharge passage 13, the pressure loss of the flow passage constituted by the cathode chamber supply passage 9, the cathode chamber 7, and the cathode water discharge passage 12 is further reduced. As a result, the discharge amount of the cathode water is further increased.
Has a cross-sectional area equal to or larger than the cross-sectional area of the anode chamber supply passage 10, the cross-sectional area of the cathode water discharge passage 12 has an area equal to or larger than the cross-sectional area of the anode water discharge passage 13, and And the total cross-sectional area of the cathode water discharge passage 12 is
It is better if the sum is larger than the sum of the sectional areas of the anode water discharge passage 13 and the anode water discharge passage 13.

Further, in the example shown in FIG.
0, a flow control valve 16 is disposed at the same position, the cross-sectional areas of the flow paths of the cathode chamber supply passage 9 and the anode chamber supply passage 10 are formed to be the same, and the cathode water discharge passage 12 is formed. And the anode water discharge channel 13 are formed to have the same sectional area.

In this way, the pressure loss in the anode chamber supply passage 10 is increased by restricting the flow control valve 16, and the cathode chamber supply passage 9, the cathode chamber 7 and the cathode water discharge passage 12
The pressure loss in the flow path composed of the anode water supply path 10, the anode chamber 8, and the anode water discharge flow path 13 is relatively reduced with respect to the pressure loss in the flow path of the raw water or the anode water. Can be further increased.

The flow control valve 16 is connected to the anode water discharge passage 13.
In this case, the pressure loss in the anode water discharge flow path 13 can be increased by restricting the flow control valve 16, and similarly, the discharge amount of the cathode water can be further increased.

Further, in the example shown in FIG.
By disposing it closer to the anode chamber 8 than the intermediate position between the anode and the cathode 2, the cross-sectional area of the water flow path in the cathode chamber 7 can be made smaller than the cross-sectional area of the water flow path in the anode chamber 8. Is also formed to be large.

That is, in the example shown in FIG. 4, the cathode chamber supply path 9 and the anode chamber supply path 10 are connected at the lower end of the electrolytic cell 1, and the cathode water discharge flow path 12 is connected at the upper end of the electrolytic cell 1.
And the anode water discharge channel 13 are connected, and the diaphragm 4 divides the inside of the electrolytic cell 1 into left and right sides, and one side is formed as a cathode chamber 7 and the other side is formed as an anode chamber 8. In the anode chamber 8, a water flow path is formed from below to above. By disposing the diaphragm 4 closer to the anode 3 side than the intermediate position between the cathode 2 and the anode 3 in a state where such a water flow path is formed, the water in the cathode chamber 7 is reduced. Is formed so that the cross-sectional area of the flow path is larger than the cross-sectional area of the water flow path in the anode chamber 8.

As described above, when the cross-sectional area of the water flow path in the cathode chamber 7 is formed so as to be larger than the cross-sectional area of the water flow path in the anode chamber 8, the water passing through the cathode chamber 7 is formed. The pressure loss is smaller than the pressure loss of water passing through the anode chamber 8, and as a result, the amount of cathode water discharged from the cathode chamber 7 increases. In particular, as shown in the illustrated example, the cross-sectional area of the cathode chamber supply path 9, the anode chamber supply path 10, the cathode water discharge flow path 12, the anode water discharge flow path 13 and the like is such that the water in the cathode chamber 7 or the anode chamber 8 is When the cross-sectional area is larger than the cross-sectional area of the flow path, the discharge amount of the electrolytic water discharged from the cathode chamber 7 and the anode chamber 8 greatly affects the pressure loss of the water in the cathode chamber 7 and the anode chamber 8. Therefore, in such a case, if the cross-sectional area of the water flow path in the cathode chamber 7 is formed so as to be larger than the cross-sectional area of the water flow path in the anode chamber 8, the amount of the cathode water generated Is obtained.

In each of the above-described embodiments, the cathode water and the anode water are generated as the electrolytic water and the amount of the generated cathode water can be increased. Thus, the amount of generated cathode water can be increased. Such examples are shown in FIGS.

The electrolyzed water generator shown in FIG. 5 includes an electrolyzer 1 and an electrolyte supply device 14.

In the electrolytic cell 1, a cathode 2 and an anode 3 are arranged along the inner surface of the electrolytic cell 1 so as to face each other, and a diaphragm 4 is disposed between the cathode 2 and the anode 3. Has been established. The diaphragm 4 is composed of an anion exchange membrane 6 and a cation exchange membrane 5 disposed opposite to each other. The cation exchange membrane 5 is disposed on the cathode 2 side and the anion exchange membrane 6 Is disposed on the anode 3 side. At this time, in the illustrated example, the anion exchange membrane 6 and the cation exchange membrane 5 constituting the diaphragm 4 face each other with a slight gap therebetween, and the anion exchange membrane 6 and the anode 3 have a slight gap therebetween. They are facing each other. On the other hand, the cation exchange membrane 5 and the cathode 2 face each other with a sufficient space therebetween, and the cathode 2 is disposed in the electrolytic cell 1 on the cathode 4 side of the cation exchange membrane 5 of the diaphragm 4. A cathode chamber 7 is formed.

The electrolyte supply device 14 is provided with an electrolysis aid comprising an inorganic calcium agent such as calcium chloride or calcium sulfate, an organic calcium agent such as calcium lactate, calcium gluconate or calcium glycerophosphate, or a mixture thereof. An agent is loaded so that an electrolysis auxiliary can be added to raw water passing through the electrolyte supply device 14. As the electrolysis auxiliary, an appropriate electrolyte such as sodium chloride or sodium sulfate can be used in addition to those mentioned above.

A raw water supply passage 15 is provided in the electrolyte supply device 14.
Is connected, and raw water such as tap water is supplied to the electrolyte supply device through the raw water supply passage 15. Although not shown, an adsorption purification section filled with activated carbon or the like or a filtration section provided with a hollow fiber membrane or the like may be provided on the upstream side of the raw water supply passage 15. In this case, the adsorption purification section is used. And the raw water purified in the filtration section can be used for electrolytic water generation.

The space between the electrolyte supply device 14 and the electrolytic cell 1 is
The raw water, which is connected by the electrolytic cell supply path 11 and to which the electrolytic auxiliary agent is added by the electrolyte supply device 14, is supplied to the electrolytic cell 1 through the electrolytic cell supply path 11.
At this time, the electrolytic cell supply path 11 is connected only to the cathode chamber 7,
Raw water is supplied only to the cathode chamber 7. Further, a cathode water discharge channel 12 is connected to the cathode chamber 7 of the electrolytic cell 1 so that the cathode water generated in the cathode chamber 7 is discharged to the outside of the electrolytic water generator through the cathode water discharge channel 12. It has become.

In the electrolyzed water generator configured as described above, raw water such as tap water is supplied to the electrolyzed water generator from the upstream side of the raw water supply passage 15 and a voltage is applied between the anode 3 and the cathode 2. Then, first, the raw water flowing through the raw water supply flow path 15 is supplied to the cathode chamber 7 through the electrolytic tank supply path 11 after the electrolytic auxiliary agent is added in the electrolyte supply device 14 to improve the electric conductivity. As a result, the cathode water is generated in the cathode chamber 7, and the cathode water is discharged to the outside of the electrolyzed water generator through the cathode water discharge channel 12.

At this time, in the electrolysis process in the electrolytic cell 1, 2H ₂ O + 2e ⁻ → H ₂
The electrolytic reaction represented by the reaction formula of + 2OH ⁻ occurs to generate hydrogen and hydroxide ions. At the same time, in this electrolysis process, water is dissociated between the cation exchange membrane 5 and the anion exchange membrane 6 to generate hydrogen ions and hydroxide ions. Hydrogen ions generated by this dissociation pass through only the cation exchange membrane 5 without passing through the anion exchange membrane 6 and are introduced into the cathode chamber 7, while hydroxide ions pass through the cation exchange membrane 5 It passes through only the anion exchange membrane 6 without being introduced into the anode 3 side.

For this reason, in the cathode chamber 7, the hydroxide ions generated on the surface of the cathode 2 are combined with the hydrogen ions introduced into the cathode chamber 7 through the cation exchange membrane 5 to be neutralized. As a result, an increase in the pH of the cathode water generated in the cathode chamber 7 is suppressed. In order to improve the concentration of dissolved hydrogen in the cathode water, the degree of electrolysis is increased to generate hydrogen in the cathode chamber 7 by electrolysis. Even if the amount and the amount of hydroxide ions generated are increased, the pH value of the cathode water does not rise so that it is not suitable for drinking.

On the surface of the anode 3,
The introduced hydroxide ion is 4OH ^-→ 2H_TwoO + O_Two+
4e^-Is oxidized by the electrochemical reaction represented by the reaction formula
Thus, water and oxygen are produced.

Further, in the electrolyzed water generator configured as described above, only the cathodic water is generated and the anodic water is not generated. Therefore, the amount of the frequently used cathodic water can be further increased. Things.

In the example shown in FIG. 6, in the configuration shown in FIG. 5, the anode 3 is connected to the anion exchange membrane 6 forming the diaphragm 4.
To contact the anion exchange membrane 6 with the anode 3. Therefore, hydroxide ions introduced to the anode 3 side through the anion exchange membrane 6 can be efficiently oxidized on the surface of the anode 3 by an electrochemical reaction,
The reaction efficiency on the surface of the anode 3 can be improved.

In the example shown in FIG. 6, when supporting the anode 3 on the anion exchange membrane 6, for example, the surface of the anion exchange membrane 6 on the side opposite to the side where the cation exchange membrane 5 is arranged. To form an anode 3
Can be formed. At this time, for example, Pt-based, I
A solution obtained by mixing a powder of a metal or alloy such as an r-based, Ru-based, or Ni-based resin, a resin powder, water, or the like is applied to the surface of the anion exchange membrane 6 and then dried to form an anion exchange membrane 6 A conductive film can be formed on the surface. Also, a coating film is formed by first applying a solution as described above to the surface of the resin sheet and drying, and then applying a solution of an anion exchange resin to the surface of the coating film and drying the same to form a conductor. The anion exchange membrane 6 can be formed on the surface of the coating film of the above. Further, at this time, by joining a metal material to the conductive film formed on the anion exchange membrane 6, the anode 3 can also be constituted by the conductor and the metal material. When joining the metal material, the metal material can be placed in contact with the surface of the coating film of the conductor, or the coating film and the metal material may be joined by a lead wire.

Further, the anode 3 can be formed by forming a conductive film by plating on the surface of the anion exchange membrane 6 opposite to the side where the cation exchange membrane 5 is disposed. This conductive film is made of Pt, Ir, Ru, N
It can be formed by plating a metal or alloy such as i-type. Plating can be performed by electroless plating. In this method, metal ions are reduced and precipitated on a substrate surface with a reducing agent to form a conductive film. As the reducing agent, sodium borohydride, hydrazine, or the like can be used. In performing the electroless plating, for example, a method in which metal ions are adsorbed on the anion exchange membrane 6 itself in advance and then immersed in a liquid containing a reducing agent to cause reduction and deposition on the membrane surface, or an anion exchange membrane 6, there is a method in which one side is brought into contact with a reducing agent, metal ions are impregnated from the opposite side, and reduced and precipitated on the contact surface with the reducing agent. Also,
At this time, by joining a metal material further to the conductive film formed on the anion exchange membrane 6, the anode 3 can be constituted by the conductive film and the metal material. In joining the metal materials, the metal material can be placed in contact with the surface of the conductive film, or the conductive film and the metal material may be joined by a lead wire.

In each of the above embodiments, it is particularly preferable that the anode 3 is formed of an inert metal (insoluble metal) such as platinum. Since an oxidation reaction occurs at the anode 3, the metal constituting the anode 3 may be oxidized to generate metal ions. Since the diaphragm 4 composed of the anion exchange membrane 6 and the cation exchange membrane 5 is disposed between the anode 3 and the cathode 2, metal ions generated on the anode 3 side can move to the cathode chamber 7. Although unlikely, it is not unlikely that such a phenomenon will occur. For this reason, by using an inert metal such as platinum as the anode 3, the dissolution of metal ions is prevented, the movement of metal ions to the cathode chamber 7 is reliably prevented, and the anode water is used in drinking cathode water. It is possible to prevent the ions of the metal constituting 3 from being mixed.

In each of the above embodiments, the diaphragm 4
The anion exchange membrane 6 and the cation exchange membrane 5 constituting
It is preferable to hold and fix the inside of the electrolytic cell 1 with a rigid body. As the rigid body, a material that is inert to the electrolytic reaction in the electrolytic cell 1 such as a hard synthetic resin or the like can be used. FIG. 7 shows an example in which the anion exchange membrane 6 and the cation exchange membrane 5 are held and fixed by a rigid body in the embodiment shown in FIG. In the illustrated example, the outer peripheral edges of the anion exchange membrane 6 and the cation exchange membrane 5 are held and fixed over the entire circumference by a holding member 17 made of a rigid body. The holding member 17 is fixedly provided on the inner surface of the electrolytic cell 1, and has a fitting concave portion 17 a which opens toward the inside of the electrolytic cell 1.
And the outer peripheral edge of the cation exchange membrane 5 is fitted into the fitting recess 17a, whereby the anion exchange membrane 6 and the cation exchange membrane 5 are firmly held and fixed, and deformation is suppressed. I have. A rod-shaped rigid body is formed along the outer surface of the anion exchange membrane 6 (the surface opposite to the cation exchange membrane 5) and the outer surface of the cation exchange membrane 5 (the surface opposite to the anion exchange membrane 6). Of the holding member 1 is provided.
At 8, the deformation of the anion exchange membrane 6 and the cation exchange membrane 5 is further suppressed.

In this way, when raw water is supplied into the electrolytic cell 1, the anion exchange membrane 6 and the cation exchange membrane 5
Even if a water pressure difference due to the hydrodynamic pressure is generated on both sides of the diaphragm 4 composed of: the deformation of the anion exchange membrane 6 and the cation exchange membrane 5 is suppressed, and the anion exchange membrane 6 and the cation exchange membrane 5 can suppress a decrease in electrolysis efficiency due to bending deformation.

In each of the above embodiments, it is preferable to provide a gas discharge mechanism for discharging gas generated at the anode 3 from the electrolytic cell 1. The example shown in FIG. 8 is provided with a discharge mechanism for discharging gas generated at the anode 3 when only cathodic water is generated as electrolyzed water. In the illustrated example, the anode 3 is formed of a conductor such as a metal formed in a mesh shape or a porous conductor, and such a conductor is brought into contact with the outer surface of the anion exchange membrane 6. Are located. As a porous conductor,
For example, a molded article made of carbon fiber, carbon graphite, foamed metal, or a porous metal molded article obtained by sintering metal powder or metal fiber in a vacuum can be used.

A gas storage tank 19 is connected to the electrolytic cell 1, and the surface of the anode 3 opposite to the anion exchange membrane 6 is exposed in the gas storage tank 19 on the outer surface of the electrolytic cell 1. ing. A gas exhaust pipe 20 is connected to the gas storage tank 19.

In the electrolyzed water generator configured as described above, even if oxygen generated at the anode 3 in the electrolysis process becomes bubbles on the surface of the anode 3, gas is exhausted through the inside of the mesh or porous anode 3. The gas is exhausted from the gas exhaust pipe 20 while being introduced into the tank, so that it is possible to prevent the oxygen bubbles from adhering to the anode 3 and reduce the electrolytic efficiency.

Further, in each of the above embodiments, the anion exchange membrane 6 and the cation exchange membrane 5 constituting the diaphragm 4 are bonded with the adhesive 21, and the diaphragm 4 is attached to the bipolar ion exchange membrane 40. It can also be formed as FIG. 9 shows an example in which the diaphragm 4 is formed as a bipolar ion exchange membrane 40 in the embodiment shown in FIG. In this case, the adhesive 21
It is desirable to use one that allows only hydrogen ions, hydroxide ions and water to pass through. In this manner, the thickness of the adhesive 21 is made uniform over the whole, so that the anion exchange membrane 6 having anion exchange ability is formed.
And the cation exchange membrane 5 having a cation exchange ability can be easily formed at the same distance. In this case, the thickness of the region where water is dissociated becomes equal, and the water dissociation becomes the same over the entire surface of the membrane. Since a voltage is applied, water dissociation occurs more efficiently. Further, even when a water pressure difference is generated on both sides of the diaphragm 4 when the raw water is supplied into the electrolytic cell 1, the distance between the anion exchange membrane 6 and the cation exchange membrane 5 is always maintained. As a result, a decrease in electrolysis efficiency can be suppressed.

The anion exchange membrane 6 constituting the diaphragm 4
And the cation exchange membrane 5 with no gap, and the adhesive 21
It can also be arranged in a state of contact without any intervention.
In this case, the electric resistance between the anion exchange membrane 6 and the cation exchange membrane 5 is not increased by the adhesive 21 or the like, and the electrolysis efficiency can be improved.

[0077]

As described above, the electrolyzed water generator according to claim 1 of the present invention comprises a cathode chamber in which a cathode is provided, an anode chamber in which an anode is provided, and a cathode chamber and an anode chamber. An electrolytic water generating apparatus, comprising: an electrolytic cell having a diaphragm disposed so as to be separated from the raw water in the electrolytic cell by means of diaphragm electrolysis from the raw water in the anode chamber and the cathode water in the cathode chamber. And a cation exchange membrane and an anion exchange membrane disposed so as to face each other, and the cation exchange membrane is disposed on the cathode compartment side and the anion exchange membrane is disposed on the anode compartment side. In order to provide a mechanism for increasing the amount of cathode water flowing out of the cathode chamber from the amount of anode water flowing out of the anode chamber, an anion constituting a diaphragm in the electrolysis process in the electrolytic cell is provided. Produced by water dissociation between exchange and cation exchange membranes Of the elementary ions and hydroxide ions, hydrogen ions move to the cathode compartment through the cation exchange membrane, and hydroxide ions move to the anode compartment through the anion exchange membrane. The hydroxide ions generated in the above step are combined with hydrogen ions and neutralized, thereby suppressing the increase in the pH of the cathode water generated in the cathode chamber, and the concentration of dissolved hydrogen in the cathode water. Even if the amount of hydrogen generation and the amount of hydroxide ions generated in the cathode chamber by electrolysis are increased by increasing the degree of electrolysis to improve
It can prevent the pH value of the cathode water from rising so that it is not suitable for drinking, and even if chlorine and hypochlorite ions are generated in the anode chamber, chlorine and hypochlorite ions will not Since it does not pass through the cathode water, it does not move to the cathode chamber, and the rise in the pH of the cathode water is suppressed, so that the generation of trihalomethane due to the haloform reaction in the cathode water is suppressed. Also in the anode chamber, hydrogen ions generated on the anode surface are combined with hydroxide ions introduced into the anode via the anion exchange membrane and neutralized, and are generated in the anode chamber. It can suppress that the pH of the anode water is excessively lowered. Further, the cathode water that is frequently used can be produced in a large amount.

According to a second aspect of the present invention, in the first aspect, the cross-sectional area of the cathode chamber supply path for supplying raw water to the cathode chamber has an area larger than the cross-sectional area of the anode chamber supply path for supplying raw water to the anode chamber. In addition, the cross-sectional area of the cathode water discharge flow path for discharging cathode water from the cathode chamber has an area equal to or larger than the cross-sectional area of the anode water discharge flow path for discharging anode water from the anode chamber. In order to form so that the sum of the cross-sectional areas of the passages is larger than the sum of the cross-sectional areas of the anode chamber supply path and the anode water discharge flow path, the raw water or cathode composed of the cathode chamber supply path, the cathode chamber and the cathode water discharge flow path The pressure loss in the water flow path is smaller than the pressure loss in the raw water or anode water flow path composed of the anode chamber supply path, the anode chamber, and the anode water discharge flow path. The amount of anode water discharged from the chamber It is capable of increasing the amount of production.

According to a third aspect of the present invention, in the first aspect, at least one of an anode chamber supply path for supplying raw water to the anode chamber and an anode water discharge flow path for discharging anode water from the anode chamber includes: In order to dispose the flow control valve, the flow control valve is throttled to increase the pressure loss in the flow path of the raw water or the anode water composed of the anode chamber supply path, the anode chamber and the anode water discharge flow path. By reducing the discharge amount of water, the discharge amount of the cathode water from the cathode chamber can be increased, and the amount of generated cathode water can be increased.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the cross-sectional area of the water path in the cathode chamber is formed to be larger than the cross-sectional area of the water path in the anode chamber. Therefore, the pressure loss in the cathode chamber is reduced more than the pressure loss of water in the anode chamber, and the discharge amount of the cathode water from the cathode chamber is larger than the discharge amount of the anode water from the anode chamber, thereby increasing the amount of generated cathode water. That can be done.

According to a fifth aspect of the present invention, there is provided an electrolyzed water generating apparatus comprising: a cathode chamber in which a cathode is provided; an anode; and a diaphragm provided so as to separate the cathode chamber from the anode. An electrolyzed water generating apparatus for generating electrolyzed water from raw water by diaphragm electrolysis in an electrolyzer, comprising a cation exchange membrane and an anion exchange membrane disposed so as to face each other. Along with the diaphragm, the cation exchange membrane is disposed on the cathode chamber side, and the anion exchange membrane is disposed on the anode side, and the electrolytic cell supply path for supplying raw water to the electrolytic cell is connected only to the cathode chamber. Since only the cathode water discharge flow path for discharging the cathode water generated in the cathode chamber was provided as a flow path for discharging the electrolytic water generated in the electrolytic cell from the electrolytic cell, the diaphragm was formed in the electrolysis process in the electrolytic cell. Constituting anion exchange membrane and cation exchange membrane Among the hydrogen ions and hydroxide ions generated by the dissociation of water, the hydrogen ions move to the cathode chamber through the cation exchange membrane, and the hydroxide ions move to the anode side through the anion exchange membrane. In the cathode chamber, hydroxide ions generated on the surface of the cathode are combined with hydrogen ions and neutralized, thereby suppressing an increase in pH of the cathode water generated in the cathode chamber. In other words, even if the amount of hydrogen generation and hydroxide ion generation in the cathode chamber by electrolysis is increased by increasing the degree of electrolysis to improve the concentration of dissolved hydrogen in the cathode water, the pH value of the cathode water becomes It can prevent the rise to an unsuitable level and suppress the production of trihalomethane due to the haloform reaction.At the anode, hydroxide introduced to the anode through an anion exchange membrane ON is intended to produce oxygen and is oxidized and water, the electrolytic water becomes that only the cathode water is generated, in which can be frequently used to produce large amounts of high cathode water.

According to a sixth aspect of the present invention, in the fifth aspect, the anode is formed by supporting a conductor on the surface of the anion exchange membrane opposite to the side on which the cation exchange membrane is disposed. The hydroxide ions introduced to the anode side through the anion exchange membrane can be efficiently oxidized by the electrochemical reaction on the anode surface, and the reaction efficiency on the anode surface is improved to improve the overall electrolysis in the electrolytic cell. The reaction efficiency of the reaction can be improved, and the production efficiency of the cathode water can be improved.

According to a seventh aspect of the present invention, in the sixth aspect, a coating film made of a conductor is formed on the surface of the anion exchange membrane opposite to the side on which the cation exchange membrane is disposed. Since the anode is formed, the anode made of a conductor supported on the anion exchange membrane can be easily formed.

The invention of claim 8 is the invention according to claim 6, wherein a conductive film is formed by plating on the surface of the anion exchange membrane opposite to the side on which the cation exchange membrane is disposed. Thus, the anode supported on the anion exchange membrane can be easily formed.

According to the ninth aspect of the present invention, in any one of the first to eighth aspects, since the insoluble metal is used as the conductor constituting the anode, the metal constituting the anode is ionized and dissolved in the electrolytic process in the electrolytic cell. And dissolution of such metal ions in the cathode water through the diaphragm can be reliably prevented.

The tenth aspect of the present invention is the invention according to any one of the first to ninth aspects, wherein the anion exchange membrane and the cation exchange membrane constituting the diaphragm are held rigidly with respect to the electrolytic cell. When raw water is supplied, deformation of the anion exchange membrane and cation exchange membrane is suppressed even if a water pressure difference due to hydrodynamic pressure occurs on both sides of the membrane composed of anion exchange membrane and cation exchange membrane. As a result, a decrease in electrolysis efficiency due to deformation of the anion exchange membrane or the cation exchange membrane can be suppressed.

According to the eleventh aspect, in the tenth aspect, since the edges of the anion exchange membrane and the cation exchange membrane are held by a rigid body, the anion exchange membrane and the cation exchange membrane are firmly formed at the edges. And the deformation of the anion exchange membrane and the cation exchange membrane is suppressed even if a water pressure difference occurs on both sides of the membrane composed of the anion exchange membrane and the cation exchange membrane due to hydrodynamic pressure As a result, it is possible to suppress a decrease in electrolysis efficiency due to deformation of the anion exchange membrane or the cation exchange membrane.

The invention according to claim 12 is the invention according to claims 1 to 1.
In any one of the above, a discharge mechanism is provided to discharge gas generated at the anode surface to the outside of the electrolytic cell. Therefore, even if oxygen generated on the anode surface during the electrolysis process in the electrolytic cell becomes bubbles, the discharge mechanism is used. It is discharged to the outside of the electrolytic cell, and it is possible to prevent a decrease in electrolysis efficiency due to adhesion of bubbles on the anode surface.

According to a thirteenth aspect of the present invention, in the twelfth aspect, the exhaust mechanism is formed by forming the anode as a porous body, so that oxygen generated on the anode surface in the electrolytic process in the electrolytic cell becomes bubbles. These bubbles can be discharged to the outside of the electrolytic cell through the inside of the porous anode.

According to a fourteenth aspect of the present invention, in the twelfth aspect, since the discharging mechanism is formed by forming the anode in a mesh shape, even if oxygen generated on the anode surface in the electrolysis process in the electrolytic cell becomes bubbles. These bubbles can be discharged to the outside of the electrolytic cell through the inside of the mesh anode.

The invention according to claim 15 is the invention according to claims 1 to 1
4. In any one of 4, the cation exchange membrane and the anion exchange membrane constituting the diaphragm are joined by an adhesive to form the diaphragm as a bipolar ion exchange membrane. By forming the membranes equally, it is easy to make the distance between the anion exchange membrane and the cation exchange membrane equal, and the thickness of the water dissociation region in the diaphragm is made equal, and the water is dissociated over the entire surface of the membrane. Voltage can be applied, and water can be efficiently dissociated in the membrane. Even if a difference occurs, the distance between the anion exchange membrane and the cation exchange membrane is always maintained, so that a decrease in electrolysis efficiency can be suppressed.

The invention according to claim 16 is the invention according to claims 1 to 1
In any one of 4, the cation exchange membrane and the anion exchange membrane are arranged in contact with each other, so that the electric resistance between the anion exchange membrane and the cation exchange membrane is increased by an adhesive or the like. Is eliminated, and the electrolytic efficiency can be improved.

The seventeenth aspect of the present invention relates to the first to first aspects.
6. In any one of 6, the raw material water supplied to the electrolysis is provided with an electrolyte supply device for adding an electrolytic auxiliary agent composed of an inorganic calcium agent, an organic calcium agent or a mixture thereof to raw water supplied to the electrolytic cell. By increasing the electric conductivity, the generation efficiency of the electrolyzed water can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of an embodiment of the present invention.

FIG. 2 is a schematic diagram showing another example of the embodiment of the present invention.

FIG. 3 is a schematic diagram showing still another example of the embodiment of the present invention.

FIG. 4 is a schematic diagram showing still another example of the embodiment of the present invention.

FIG. 5 is a schematic diagram showing still another example of the embodiment of the present invention.

FIG. 6 is a schematic diagram showing still another example of the embodiment of the present invention.

FIG. 7 is a schematic diagram showing still another example of the embodiment of the present invention.

FIG. 8 is a schematic diagram showing still another example of the embodiment of the present invention.

9A is a schematic diagram showing still another example of the embodiment of the present invention, and FIG. 9B is a partially enlarged view of FIG. 9A.

FIG. 10 is a schematic diagram for explaining the principle of suppressing the pH rise of the cathode water in the present invention.

FIG. 11 is a schematic view showing an example of a conventional technique using a bipolar ion exchange membrane.

[Explanation of symbols]

 Reference Signs List 1 electrolytic cell 2 cathode 3 anode 4 diaphragm 5 cation exchange membrane 6 anion exchange membrane 7 cathode compartment 8 anode compartment 9 cathode compartment supply passage 10 anode compartment supply passage 12 cathode water discharge passage 13 anode water discharge passage 14 electrolyte supply Apparatus 16 Flow control valve 21 Adhesive 40 Bipolar ion exchange membrane

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Noguchi 1048 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. Inventor Kenji Kikuchi 2500 Yasaka-cho, Hikone-shi, Shiga Prefecture F-term in the Department of Materials Science, Faculty of Engineering, Shiga Prefectural University EA09 EB01 EB04 EB13 EB19 EB35 ED12 ED13

Claims (17)

[Claims] An electrolytic cell comprising: a cathode chamber provided with a cathode; an anode chamber provided with an anode; and a diaphragm provided so as to separate the cathode chamber and the anode chamber. An electrolyzed water generator for producing anolyte water in an anode chamber by diaphragm electrolysis from raw water in a tank and catholyte water in a cathode chamber, respectively. The membrane is composed of an exchange membrane, and the membrane is disposed so that the cation exchange membrane is disposed on the cathode compartment side and the anion exchange membrane is disposed on the anode compartment side, and the amount of cathode water flowing out of the cathode compartment is reduced. And a mechanism for increasing the amount of anode water flowing out of the anode chamber. 2. Cathode water for discharging cathode water from a cathode chamber, wherein a cross-sectional area of a cathode chamber supply path for supplying raw water to the cathode chamber has an area greater than or equal to a cross-sectional area of an anode chamber supply path for supplying raw water to the anode chamber. The cross-sectional area of the discharge flow path has an area equal to or larger than the cross-sectional area of the anode water discharge flow path for discharging the anode water from the anode chamber, and the total cross-sectional area of the cathode chamber supply path and the cathode water discharge flow path is the anode chamber supply path. The electrolyzed water generation device according to claim 1, wherein the electrolyzed water generation device is formed so as to be larger than the sum of the cross-sectional areas of the anode water discharge channel and the anode water discharge channel. 3. A flow control valve is provided in at least one of an anode chamber supply path for supplying raw water to the anode chamber and an anode water discharge flow path for discharging anode water from the anode chamber. The electrolyzed water generation device according to claim 1, wherein 4. The cross-sectional area of the water path in the cathode chamber,
The electrolyzed water generating apparatus according to any one of claims 1 to 3, wherein the apparatus is formed so as to be larger than a cross-sectional area of a water path in the anode chamber. 5. An electrolytic cell comprising a cathode chamber in which a cathode is disposed, an anode, and a diaphragm disposed so as to separate the cathode chamber and the anode. An electrolyzed water generating apparatus for generating electrolyzed water, wherein a membrane is formed by a cation exchange membrane and an anion exchange membrane which are disposed so as to face each other, and the cation exchange membrane is disposed on the cathode chamber side. , An anion exchange membrane is disposed on the anode side, an electrolytic cell supply path for supplying raw water to the electrolytic cell is connected to only the cathode chamber, and the electrolytic water generated in the electrolytic cell is supplied to the electrolytic cell. An electrolyzed water generating apparatus characterized in that only a cathode water discharge flow path for discharging cathode water generated in a cathode chamber is provided as a flow path discharged from the cathode water chamber. 6. The anode according to claim 5, wherein an anode is formed by supporting a conductor on the surface of the anion exchange membrane opposite to the side on which the cation exchange membrane is disposed. The electrolyzed water generating apparatus according to the above. 7. An anode formed by forming a coating film made of a conductor on the surface of the anion exchange membrane opposite to the side on which the cation exchange membrane is disposed. The electrolyzed water generator according to claim 6. 8. An anode comprising a conductive film formed by plating on the surface of the anion exchange membrane opposite to the side on which the cation exchange membrane is disposed. Item 7. An electrolyzed water generator according to item 6. 9. The electrolyzed water generator according to claim 1, wherein an insoluble metal is used as a conductor constituting the anode. 10. The electrolytic water generation according to claim 1, wherein the anion exchange membrane and the cation exchange membrane constituting the diaphragm are held rigidly with respect to the electrolytic cell. apparatus. 11. The method according to claim 1, wherein the edges of the anion exchange membrane and the cation exchange membrane are held by a rigid body.
The electrolyzed water generator according to 0. 12. The apparatus for producing electrolyzed water according to claim 1, further comprising a discharge mechanism for discharging gas generated on the surface of the anode to the outside of the electrolytic cell. 13. The discharging mechanism according to claim 1, wherein the discharging mechanism is constituted by forming the anode as a porous body.
3. The electrolyzed water generator according to 2. 14. The discharge mechanism is constituted by forming the anode in a mesh shape.
3. The electrolyzed water generator according to claim 1. 15. The membrane according to claim 1, wherein the cation exchange membrane and the anion exchange membrane constituting the membrane are bonded with an adhesive, and the membrane is formed as a bipolar ion exchange membrane. An electrolyzed water generator according to any one of the above. 16. The electrolyzed water generating apparatus according to claim 1, wherein the cation exchange membrane and the anion exchange membrane are arranged in contact with each other. 17. An electrolyte supply device for adding an electrolytic auxiliary agent comprising an inorganic calcium agent, an organic calcium agent, or a mixture thereof to raw water supplied to an electrolytic cell. An electrolyzed water generator according to any one of claims 16 to 16.