JP6910003B2 - Electrolyzed water generator and electrolyzed water generation method - Google Patents

Description

The present invention relates to an electrolyzed water generator and an electrolyzed water generating method.

Conventionally, an electrolyzed water generator that generates electrolyzed water used for sterilization, deodorization, etc. is known (see, for example, Patent Document 1). Further, it is known that electrolyzed water has effects such as sterilization and deodorization when the pH is within a predetermined range.

In Patent Document 1, an electrolytic cell in which the inside is divided into three separate chambers, a central compartment and a bilateral compartment, and one lateral compartment of the electrolytic cell are arranged by two ion permeable films. A pair of electrodes, an electrode arranged in the other side compartment of the electrolytic cell, a salt water supply pipeline connected to the central compartment and supplying salt water to the chamber, and connected to each side compartment. Disclosed is an electrolyzed water generator provided with a water supply pipeline for supplying water to each of these lateral compartments.

Japanese Unexamined Patent Publication No. 9-085247

Since the electrolyzed water may have effects such as sterilization and deodorization when the pH is within a predetermined range, it is desired that the pH of the electrolyzed water can be easily controlled within a predetermined range. There is. However, with a conventional electrolyzed water generator, it is difficult to accurately control the pH within a predetermined range.

The present invention provides an electrolyzed water generator or the like that can accurately control the pH of the electrolyzed water to be produced with a simple configuration.

The electrolyzed water generator according to one aspect of the present invention includes a solution tank containing at least a solution containing an electrolyte, a first electrode provided in the solution tank, and a first electrode provided in the solution tank and paired with the first electrode. The two electrodes, at least one amphoteric permeable film provided in the solution tank and located between the first electrode and the second electrode, and the first electrode when the second electrode is used as a reference are positive. Alternatively, energize for the first time in the first energization direction, which is the energization direction in which a negative voltage is applied, and in the second energization direction opposite to the first energization direction, a second time different from the first time. It is provided with a control unit that repeatedly switches the energization direction so as to energize.

Further, in the electrolyzed water generation method according to one aspect of the present invention, in a solution tank provided with a first electrode and a second electrode, an arrangement step of arranging both ion permeable films between the first electrode and the second electrode. And the first energization step of energizing for the first time in the first energization direction, which is the energization direction in which a positive or negative voltage is applied to the first electrode when the second electrode is used as a reference, and the first energization. A control step of repeatedly switching the second energization step of energizing for a second time different from the first time in the second energization direction opposite to the direction is included.

According to the electrolyzed water generator or the like according to one aspect of the present invention, it is possible to provide an electrolyzed water generator capable of accurately controlling the pH of the electrolyzed water to be produced with a simple configuration.

FIG. 1 is a diagram showing a configuration of an electrolyzed water generator according to a first embodiment. FIG. 2 is a graph showing the ratio of effective chlorine to the pH of electrolyzed water. FIG. 3 is a flowchart showing a procedure in which the electrolyzed water generator according to the first embodiment generates electrolyzed water. FIG. 4 is a diagram for explaining the electrolysis of the aqueous solution performed by the electrolyzed water generator according to the first embodiment. FIG. 5A is a graph showing an example of the relationship between the time ratio indicating the first time with respect to the second time and the pH of the electrolyzed water on the main anode electrode side. FIG. 5B is a graph showing another example of the relationship between the time ratio indicating the first time to the second time and the pH of the electrolyzed water on the main anode electrode side. FIG. 6 is a graph showing the relationship between the pH of electrolyzed water and the energization time. FIG. 7 is a diagram showing the configuration of the electrolyzed water generator according to the second embodiment. FIG. 8 is a diagram showing a configuration of an electrolyzed water generator according to a third embodiment. FIG. 9 is a diagram showing details of the internal configuration of the second chamber of the solution tank included in the electrolyzed water generator according to the third embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that all of the embodiments described below show comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, the order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

It should be noted that each figure is a schematic view, and the size, shape, etc. are not necessarily exactly shown. Further, in each figure, substantially the same configuration is designated by the same reference numerals, and duplicate description may be omitted or simplified.

Further, in the present specification, sterilization refers to, for example, fungi such as Staphylococcus aureus and Staphylococcus epidermidis, Escherichia coli. (E. coli), Pseudomonas sp. (Pseudomonas aeruginosa), Klebsiella sp. Bacteria such as (Klebsiella pneumoniae), Cladosporium. sp. It means that fungi including molds such as (black mold) and Aspergillus (black aspergillus) and / or viruses such as norovirus are decomposed to reduce the total number of bacteria and the like, and it also means sterilization or sterilization. include. The fungi, bacteria, fungi, viruses, etc. that are the targets of the above sterilization are examples, and are not limited.

(Embodiment 1)
[Configuration of electrolyzed water generator]
First, the configuration of the electrolyzed water generator according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing a configuration of an electrolyzed water generator 100 according to a first embodiment.

The electrolyzed water generator 100 is an electrolyzed water generator that electrolyzes an aqueous solution containing chlorine to produce electrolyzed water having a bactericidal effect. The bactericidal effect is an effect of sterilizing fungi, bacteria, fungi, viruses and the like, and particularly means an effect of sterilizing many bacteria in a short time. The electrolyzed water generator 100 includes a solution tank 110, a first electrode (main anode electrode) 112, a second electrode (main cathode electrode) 113, both ion permeable membranes 114, a control unit 140, and a take-out unit 131a. 131b and.

The solution tank 110 is a container that houses a solution containing at least an electrolyte. Specifically, the solution tank 110 is an electrolytic cell for electrolyzing the contained solution. More specifically, the electrolyte ^{contains chloride ions (Cl −} ) and the solution is an aqueous solution containing chloride ions.

The solution is, for example, sodium chloride (NaCl), water material containing chlorine ions such as hydrogen chloride (HCl) was added _(H 2 O). Specifically, the inside of 111 is partitioned by two amphoteric ion permeable membranes 114 into a first chamber 111a, a second chamber 111b, and a third chamber 111c. Before electrolyzing the solution in the solution tank 110 by the first electrode 112 and the second electrode 113, for example, the first chamber 111a and the second chamber 111b contain water, and the third chamber 111c Contains water containing sodium chloride. The solution in the solution tank 110 is energized by energizing the first electrode 112 and the second electrode 113 provided in the solution tank 110 (that is, a voltage is applied to the first electrode 112 and the second electrode 113). Is electrolyzed to produce electrolyzed water containing hypochlorous acid (HClO) (specifically, acidic electrolyzed water).

The material of the solution tank 110 is not particularly limited as long as it is a material that is less likely to be corroded by an aqueous solution containing chloride ions and electrolyzed water containing hypochlorous acid generated by electrolyzing the aqueous solution.

The first electrode 112 and the second electrode 113 are a pair of electrodes for electrolyzing the solution in 111. The first electrode 112 is provided in the first chamber 111a, and the second electrode 113 is provided in the second chamber 111b. Electrolyzed water is produced, for example, by applying a voltage to the first electrode 112 and the second electrode 113 and electrolyzing the solution in the solution tank 110. More specifically, the potential is applied by the voltage application unit controlled by the control unit 140, which will be described later, so that the first electrode 112 is the anode and the second electrode 113 is the cathode. Hypochlorite is applied to the first chamber 111a by applying a voltage between the two electrodes 113, that is, by applying a voltage to the solution located between the first electrode 112 and the second electrode 113. Acidic electrolyzed water containing the above is generated, and alkaline electrolyzed water is generated in the second chamber 111b.

The materials of the first electrode 112 and the second electrode 113 are not particularly limited, but are, for example, metal electrodes containing platinum as a main component.

In the present specification, the acidic electrolyzed water mainly produced in the first chamber 111a and the alkaline electrolyzed water mainly produced in the second chamber 111b may be collectively referred to as electrolyzed water.

Further, in the present specification, "acidic" means a case where the pH is lower than 7, and "alkaline" means a case where the pH is higher than 7.

The biion permeable film 114 is provided in the solution tank 110 and is a member that restricts the movement of cations such as sodium ions and anions such as chlorine ions contained in the solution and the electrolyzed water in the solution tank 110. .. The amphoteric permeable membrane 114 is, for example, a porous membrane or a amphoteric exchange membrane. As the material of the porous film, for example, a ceramic material and a resin material are adopted, but the material is not particularly limited. The biion permeable membrane 114 is located between the first electrode 112 and the second electrode 113 in the solution tank 110. In the present embodiment, two amphoteric ion permeable membranes are provided in the solution tank 110. Specifically, the solution tank 110 has two ions between the first chamber 111a having the first electrode 112, the second chamber 111b having the second electrode 113, and the first chamber 111a and the second chamber 111b. It has a third chamber 111c partitioned by a permeable membrane 114, and the third chamber 111c contains at least a solution containing an electrolyte.

The control unit 140 is a control device for controlling the pH of the electrolyzed water in the solution tank 110. Specifically, the control unit 140 controls the direction of the voltage applied to the first electrode 112 and the second electrode 113 so that the pH of the electrolyzed water becomes a predetermined value. In other words, the control unit 140 controls the energization direction between the first electrode 112 and the second electrode 113 so that the pH of the electrolyzed water becomes a predetermined value. More specifically, the control unit 140 energizes the first electrode 112 and the second electrode 113 by applying a positive or negative voltage to the first electrode 112 when the second electrode 113 is used as a reference. The energization direction is repeatedly switched so that the energization is performed in the first energization direction, which is the direction, for the first time, and is energized in the second energization direction opposite to the first energization direction for the second time, which is different from the first time. ..

Here, the first energizing direction is, for example, the energizing direction in which the first electrode 112 is the anode and the second electrode 113 is the cathode, and the second energizing direction is, for example, the first electrode 112 as the cathode. This is the energizing direction with the second electrode 113 as the anode.

Further, the first electrode 112 is controlled by the control unit 140 so as to have a positive or negative polarity relative to the second electrode 113, and the second electrode 113 is not always grounded. You may.

For example, when both ion permeable films 114 are arranged between the first electrode 112 and the second electrode 113 and the aqueous solution containing chlorine ions is continuously electrolyzed, the first electrode 112 is used as an anode and the second electrode is second. When the electrode 113 is used as a cathode, the pH of the acidic electrolyzed water generated in the first chamber 111a in which the first electrode 112 is arranged continues to decrease to a pH lower than 4.0.

FIG. 2 is a graph showing the ratio of hypochlorous acid to the pH of the solution. The hypochlorous acid ratio is the ratio of chlorine-based substances effective for sterilization among the chlorine-based substances contained in the solution (aqueous solution). More specifically, FIG. 2 is a graph showing the ratio of hypochlorous acid to the pH of the solution among the chloride ions contained in the solution.

As shown in FIG. 2, when the pH of the solution containing chloride ions is, for example, 4.0 or more and 6.5 or less, among the chlorine-based substances produced when water containing chlorine ions is electrolyzed, It can be seen that the proportion of hypochlorous acid is high (for example, 90% or more). It is known that as the pH increases, the proportion of hypochlorous acid decreases and hypochlorite ions (ClO ^{−) are produced.} It is also known that when the pH is lowered, the ratio of hypochlorous acid is lowered and chlorine gas (Cl ₂ ) is generated. Therefore, in order to effectively produce hypochlorous acid having a high bactericidal effect, it is necessary to perform an operation so that the pH of the acidic electrolyzed water is 4.0 or more and 6.5 or less as a predetermined value.

The control unit 140 preferably changes the direction (that is, the energization direction) of the voltage applied to the first electrode 112 and the second electrode 113 in order to control the pH of the electrolyzed water to be a predetermined value. Specifically, the control unit 140 sets the direction of the voltage applied to the first electrode 112 and the second electrode 113 as an operation of controlling the pH of the acidic electrolyzed water to a predetermined value. Control is performed to reverse the direction of the voltage so that the opposite is true. That is, the control unit 140 controls to reverse the polarities of the first electrode 112 and the second electrode 113. More specifically, the control unit 140 is realized by a power supply circuit including a converter and the like, and controls a voltage application unit electrically connected to the first electrode 112 and the second electrode 113. For example, the voltage application unit generates a predetermined voltage based on the electric power received from an external power source such as a commercial power source, and applies the generated voltage to the first electrode 112 and the second electrode 113.

For example, when the control unit 140 controls the energization direction so that the first electrode 112 is the anode and the second electrode 113 is the cathode, the control unit 140 applies to the first electrode 112 and the second electrode 113. When the direction of the voltage is reversed, the first electrode 112 serves as a cathode and the second electrode 113 serves as an anode.

In this way, the direction of the voltage applied to the first electrode 112 and the second electrode 113 by the control unit 140 is reversed to the direction applied when the solution is electrolyzed, so that the solution is separated by the both ion permeable film 114. Alkaline ions contained in the alkaline electrolyzed water (for example, sodium ions when an aqueous solution containing sodium chloride is electrolyzed) will flow into the acidic electrolyzed water containing the hypochlorous acid. Therefore, the pH of the acidic electrolyzed water is raised. That is, the control unit 140 can easily control the pH of the acidic electrolyzed water to a predetermined value by suitably controlling the direction of the voltage applied to the first electrode 112 and the second electrode 113.

Further, for example, the control unit 140 sets the first energization direction as the energization direction in which a positive voltage is applied to the first electrode 112 when the second electrode 113 is used as a reference, and sets the first time to be longer than the second time. In this case, the energization direction in which the first electrode 112 and the second electrode 113 are energized is repeatedly switched so that the minimum pH value of the electrolyzed water containing hypochlorous acid in the first chamber 111a is 4.0 or more. Take control.

Further, the control unit 140 has, for example, set the first time, which is the time for energizing in the first energizing direction, to be 1.05 or more and 1.5 or less with respect to the second time, which is the time for energizing in the second energizing direction. In addition, control is performed to repeatedly switch the energizing direction in which the first electrode 112 and the second electrode 113 are energized.

Further, the control unit 140 starts energization from the shorter of the first time and the second time. Specifically, when the first time with respect to the second time is 1.05 or more and 1.5 or less, the control unit 140 starts energization of the first electrode 112 and the second electrode 113 from the second energization direction. .. In other words, the control unit 140 first controls the energization direction so that the electrode on the side that mainly produces acidic electrolyzed water containing hypochlorous acid (hereinafter referred to as the main anode electrode) is used as the cathode.

In the following description, a case where the first electrode 112 is the main anode electrode and the second electrode 113 is the main cathode electrode having the opposite polarity to the main anode electrode will be described.

Further, the control unit 140 may execute an operation based on a control program such as reversing the directions of the voltages applied to the first electrode 112 and the second electrode 113 when a predetermined time has elapsed. good.

When the control unit 140 executes an operation based on the control program, the control unit 140 has a storage device such as a ROM (Read Only Memory) for storing the control program and a RAM (Random Access Memory), and a CPU (Central Processing Unit) for executing the control program. ) And may be provided. Further, the control unit 140 may include a dedicated electronic circuit or the like in which the control program is realized in hardware when executing a predetermined operation. Further, the control unit 140 may include a time measuring unit such as an RTC (Real Time Clock) in order to measure the time. Further, the control unit 140 may stop energizing the first electrode 112 and the second electrode 113 based on a predetermined time.

The take-out unit 131a is a pump for taking out the acidic electrolyzed water contained in the first chamber 111a of the solution tank 110 from the solution tank 110.

The take-out unit 131b is a pump for taking out the alkaline electrolyzed water contained in the second chamber 111b of the solution tank 110 from the solution tank 110.

The take-out unit 131a and the take-out unit 131b may be configured to be driven independently, or the control unit 140 may control the drive of the take-out unit 131a and the take-out unit 131b. In that case, the control unit 140 includes, for example, a control program for driving the take-out unit 131a and the take-out unit 131b in the memory included in the control unit 140.

[Procedure of electrolyzed water generation method]
Subsequently, with reference to FIGS. 3 to 6, the details of the method for generating the electrolyzed water generated by the electrolyzed water generator 100 according to the first embodiment will be described.

FIG. 3 is a flowchart showing a procedure in which the electrolyzed water generator 100 according to the first embodiment generates electrolyzed water.

First, in the solution tank 110 provided with the first electrode 112 and the second electrode 113, both ion permeable films 114 are arranged between the first electrode 112 and the second electrode 113, and for example, a solution containing chlorine ions as an electrolyte is provided. The solution tank 110 is housed in the third chamber 111c, and water is housed in the first chamber 111b and the second chamber 111b of the solution tank 110.

The electrolyzed water generator 100 starts energization in the second energizing direction and starts generating electrolyzed water (step S101). Specifically, in step S101, the control unit 140 controls the energization direction between the first electrode 112 and the second electrode 113 so that the first electrode 112 is the cathode and the second electrode 113 is the anode. do. Further, in step S101, the control unit 140 electrolyzes the aqueous solution containing chlorine by applying a voltage to the first electrode 112 and the second electrode 113, and also produces alkaline electrolyzed water.

Next, the control unit 140 determines whether or not the second time has elapsed (step S102). When the control unit 140 determines that the second time has not elapsed (No in step S102), the control unit 140 continues to energize in the second energizing direction.

On the other hand, when the control unit 140 determines that the second time has elapsed (Yes in step S102), the control unit 140 reverses the energization in the second energization direction and starts energization in the first energization direction (step S103). .. Specifically, in step S103, the control unit 140 reverses the energization direction so that the first electrode 112 is the anode and the second electrode 113 is the cathode.

Next, the control unit 140 determines whether or not the first time has elapsed (step S104). When the control unit 140 determines that the first time has not elapsed (No in step S104), the control unit 140 continues to energize in the first energization direction.

On the other hand, when the control unit 140 determines that the first time has elapsed (Yes in step S104), the control unit 140 reverses the energization in the first energization direction and starts energization in the second energization direction (step S101). .. That is, when the control unit 140 determines that the first time has elapsed, the control unit 140 returns the control to step S101.

FIG. 4 is a diagram for explaining the electrolysis of the solution performed by the electrolyzed water generator 100 according to the first embodiment. Note that FIG. 4 illustrates a case where the first electrode 112 is used as an anode and the second electrode 113 is used as a cathode.

As shown in the reaction formula (1) below, when a voltage is applied to the first electrode 112 and the second electrode 113, Cl ^{− in} the aqueous solution reacts and chlorine gas (Cl ₂ ) is generated on the anode side. do.

2Cl ⁻ → Cl ₂ + 2e ⁻ (1)

Next, as shown in the reaction formula (2) below, hypochlorous acid (HClO) is produced by the reaction of _{chlorine gas (Cl 2} ) and water (H _{2 O).}

Cl ₂ + H ₂ O → HClO + H ⁺ + Cl ^― (2)

Further, on the anode side, electrolysis of water occurs as shown in the following reaction formula (3).

2H ₂ O → O ₂ + 4H ⁺ + 4e ⁻ (3)

From the above reaction formula (3), it can be seen that on the anode side, when the solution is electrolyzed to generate electrolyzed water, the electrolyzed water becomes acidic.

On the other hand, on the cathode side, water electrolysis occurs as shown in the following reaction formula (4).

2H ₂ O + 2e ⁻ → H ₂ + 2OH ⁻ (4)

In addition, sodium chloride (NaCl) may be used in order to use chlorine ion (Cl ^{−) as the electrolyte.} In this case, the sodium ion (Na ⁺ ) contained in sodium chloride (NaCl) moves to the cathode side.

From the above, it can be seen that on the cathode side, when the solution is electrolyzed to generate electrolyzed water, the electrolyzed water becomes alkaline. The electrolyzed water generator 100 reverses the energizing direction between the first electrode 112 and the second electrode 113 with time, that is, reverses the polarities of the first electrode 112 and the second electrode 113 with time. Therefore, it is possible to prevent the pH of the electrolyzed water from becoming too high and the pH of the electrolyzed water from becoming too low.

The electrolyzed water generator 100 may further include a pH measuring device such as an ion concentration sensor in order to measure the pH of the acidic electrolyzed water. Further, the control unit 140 may control the start or end of energization of the first electrode 112 and the second electrode 113 based on the pH of the acidic electrolyzed water measured by the pH measuring device.

FIG. 5A shows the time ratio indicating the first time to the second time and the pH of the electrolyzed water on the main anode electrode 112 (first electrode 112) side (that is, the acidic electrolyzed water generated in the first chamber 111a). It is a graph which shows an example of a relationship. In the graph shown in FIG. 5A, water was contained in the first chamber 111a and the second chamber 111b, and water containing 1% by weight of sodium chloride was contained in the third chamber 111c before the start of electrolysis. It is an experimental result of the case. Further, in the graph shown in FIG. 5A, the applied current is 0.1 A, the current is energized in the second energization direction, then the energization direction is reversed in the first energization direction, and the energization direction is further reversed in the second energization direction. It is an experimental result when one cycle of returning is set to 6 minutes and energized for 24 minutes (that is, energized for 4 cycles). The horizontal axis indicates the time ratio of the first hour to the second hour. The vertical axis on the right side of the graph in FIG. 5A shows the effective chlorine concentration of acidic electrolyzed water. In FIG. 5A, chlorine-based substances including chlorine gas and hypochlorite ions in addition to hypochlorous acid. It shows the concentration.

As shown in FIG. 5A, it can be seen that the effective chlorine concentration on the main anode electrode 112 side is 140 ppm or more, which is a high effective chlorine concentration, regardless of the time ratio in which the energization direction is reversed. This indicates that a chlorine-based substance having a bactericidal effect is produced even when the energization direction is repeatedly reversed. Even after 24 minutes, if the time ratio indicating the first hour to the second hour is 1.05 or more and 1.3 or less, the pH is about 3 or more, and the effective chlorine concentration is also high. You can see that it is.

FIG. 5B shows another example of the relationship between the time ratio indicating the first time to the second time and the pH of the electrolyzed water on the main anode electrode 112 side (that is, the acidic electrolyzed water generated in the first chamber 111a). It is a graph which shows. In the graph shown in FIG. 5B, water was contained in the first chamber 111a and the second chamber 111b, and water containing 1% by weight of sodium chloride was contained in the third chamber 111c before the start of electrolysis. It is an experimental result of the case. Further, in the graph shown in FIG. 5B, the applied current is 0.2 A, the current is energized in the second energization direction, then the energization direction is reversed in the first energization direction, and the energization direction is further reversed in the second energization direction. It is an experimental result when one cycle of returning is set to 6 minutes and the electric current is energized for 12 minutes (that is, the electric current is energized for two cycles). The horizontal axis indicates the time ratio of the first hour to the second hour. The vertical axis on the right side of the graph in FIG. 5B shows the effective chlorine concentration of acidic electrolyzed water. In FIG. 5B, chlorine-based substances including chlorine gas and hypochlorite ions in addition to hypochlorous acid. It shows the concentration.

As shown in FIG. 5B, it can be seen that the effective chlorine concentration on the main anode electrode 112 side is 100 ppm or more, which is a high effective chlorine concentration, regardless of the time ratio in which the energization direction is reversed. Even after 12 minutes, if the time ratio indicating the first hour to the second hour is 1.1 or more and 1.5 or less, the pH is about 3 or more, and the effective chlorine concentration is also high. You can see that it is.

From the results shown in FIGS. 5A and 5B, according to the electrolyzed water generator 100, the pH is set to hypochlorous acid by setting the time ratio indicating the first time to the second time to be 1.05 or more and 1.5 or less. It is shown that more hypochlorite ions can be generated because the acid can be easily generated. Further, by setting the time ratio indicating the first time to the second time to 1.1 or more and 1.3 or less, the pH is set to a state in which hypochlorous acid is likely to be generated, and the energizing current and the total energizing time. Etc. can be relaxed.

FIG. 6 is a graph showing the relationship between the pH of the electrolyzed water on the main anode electrode (first electrode 112) side with respect to the total energization time of the first electrode 112 and the second electrode 113. In the graph shown in FIG. 6, water was contained in the first chamber 111a and the second chamber 111b, and water containing 1% by weight of sodium chloride was contained in the third chamber 111c before the start of electrolysis. It is an experimental result of the case. The graph shown in FIG. 6 is an experimental result when the applied current is 0.1 A and the time ratio of the first energization time to the second energization time is 1.12. Specifically, the first hour is set to 3 minutes and 10 seconds, and the second hour is set to 2 minutes and 50 seconds. The horizontal axis indicates the total energization time (unit: minutes) for the first electrode 112 and the second electrode 113. The vertical axis on the right side of the graph in FIG. 6 is the potential of the main anode electrode (first electrode 112) when the main cathode electrode (second electrode 113) is used as a reference. The potential difference (specifically, the potential difference between the main anode electrode 112 and the main cathode electrode 113) of the main anode electrode 112 (first electrode 112) when the main cathode electrode 113 (second electrode 113) is used as a reference is shown. ..

As shown in FIG. 6, the control unit 140 starts energization by applying a negative potential to the main anode electrode 112 with respect to the main cathode electrode 113. Therefore, immediately after the start of energization, the pH of the electrolyzed water on the main anode electrode 112 side rises, and the electrolyzed water becomes alkaline.

After the lapse of the second time, when the control unit 140 reverses the energizing directions of the main anode electrode 112 and the main cathode electrode 113 (that is, reverses the applied voltage), the pH on the main anode electrode 112 side is changed as the voltage changes. Also declines.

Further, when the control unit 140 reverses the energizing directions of the main anode electrode 112 and the main cathode electrode 113 after the lapse of the first time, the pH on the main anode electrode 112 side also rises as the voltage changes.

By repeating such control of reversing the energization direction, the pH of the main anode electrode 112 side changes in a zigzag shape, and as shown by a thick line in FIG. 6, the pH of the electrolyzed water on the main anode electrode 112 side The minimum value gradually decreases. Further, by lengthening the first time rather than the second time, that is, by lengthening the time for the main anode electrode 112 to generate acidic electrolyzed water containing hypochlorous acid as an anode, the electrolysis on the main anode electrode 112 side is performed. Gradually lower the pH of the water. Further, with the passage of time, the minimum value of the pH on the main anode electrode 112 side is less likely to decrease, and even 24 minutes after the start of energization, the pH is between 5 and 6 or less. That is, by appropriately controlling the first time with respect to the second time, it is possible to keep the minimum value of the pH of the electrolyzed water on the main anode electrode 112 side suitably maintained.

[Effects, etc.]
As described above, the electrolytic water generator 100 according to the first embodiment includes a solution tank 110 containing at least a solution containing an electrolyte, a first electrode 112 provided in the solution tank 110, and a first electrode 112 provided in the solution tank 110. When the paired second electrode 113, at least one amphoteric ion permeable film 114 provided in the solution tank 110 and located between the first electrode 112 and the second electrode 113, and the second electrode 113 are used as a reference. The first time is the first time in the first energization direction, which is the energization direction in which a positive or negative voltage is applied to the first electrode 112, and the second energization direction in the direction opposite to the first energization direction. A control unit 140 that repeatedly switches the energization direction so as to energize for a different second time is provided.

According to such a configuration, the control unit 140 can accurately control the pH of the generated electrolyzed water with a simple configuration. For example, when the electrolyte contains chloride ions, the pH of the electrolyzed water is a predetermined value (for example, pH 4.0 to 6.5) suitable for effectively producing hypochlorous acid having a high bactericidal effect. Degree) can be.

For example, the solution tank 110 has two amphoteric ion permeable membranes 114 between the first chamber 111a having the first electrode 112, the second chamber 111b having the second electrode 113, and the first chamber 111a and the second chamber 111b. It has a third chamber 111c partitioned by. In this case, the third chamber 111c contains at least a solution containing an electrolyte.

By forming the solution tank 110 into a three-chamber structure, the electrolyzed water generated on the first electrode 112 side and the electrolyzed water generated on the second electrode 113 side can be separated and made difficult to mix. Therefore, for example, when sodium chloride is added to the third chamber 111c, it becomes difficult for sodium ions to move to the main anode electrode (first electrode 112 in the present embodiment), and the electrolyzed water on the main anode electrode side. It is possible to prevent sodium ions from being taken out at the same time when they are taken out from the take-out portion 131a. Further, according to such a configuration, it is possible to suppress a decrease in the bactericidal effect of the electrolyzed water generated on the main anode electrode side.

Further, for example, the electrolyte contains chloride ions, and the first electrode 112 and the second electrode 113 generate electrolyzed water containing hypochlorous acid when a voltage is applied.

As shown in FIGS. 5A and 5B, even when the energization direction is changed with time, the effective chlorine concentration does not decrease. Therefore, according to the electrolyzed water generator 100, hypochlorous acid having a high bactericidal effect is obtained. It can be seen that chloric acid can be produced. That is, according to such a configuration, the electrolyzed water generator 100 can suitably control the pH, so that it is possible to generate electrolyzed water having a high bactericidal effect.

Further, for example, the first energizing direction is the energizing direction in which a positive voltage is applied to the first electrode 112 when the second electrode 113 is used as a reference, and the first time is longer than the second time, and the control unit 140 Repeatedly switches the energization direction in which the first electrode 112 and the second electrode 113 are energized so that the minimum pH value of the electrolyzed water containing hypochlorous acid in the first chamber 111a is 4.0 or more.

According to such a configuration, it is possible to generate electrolyzed water containing hypochlorous acid having a high bactericidal effect while suppressing the generation of chlorine gas which is harmful to humans.

Further, for example, the control unit 140 repeatedly switches the energizing direction for energizing the first electrode 112 and the second electrode 113 so that the second time with respect to the first time is 1.05 or more and 1.5 or less.

According to such a configuration, the control unit 140 can suitably adjust the pH of the electrolyzed water on the main anode electrode 112 side to a pH suitable for producing hypochlorous acid. Therefore, according to such a configuration, it is possible to suppress a decrease in the bactericidal effect of the electrolyzed water generated on the main anode electrode side.

Further, for example, the control unit 140 may start energization from the second energization direction.

According to such a configuration, it is possible to prevent the pH of the electrolyzed water on the main anode electrode side from dropping rapidly. If the pH drops too low, the risk of chlorine gas generation increases. However, according to such a configuration, since the pH of the electrolyzed water on the main anode electrode side is suppressed from rapidly decreasing, hypochlorous acid having a high bactericidal effect is generated while suppressing the generation of chlorine gas. be able to.

(Embodiment 2)
Subsequently, the electrolyzed water generator according to the second embodiment will be described with reference to FIG. 7.

The electrolyzed water generator according to the second embodiment includes a mechanism for circulating the solutions in the first chamber 111a and the second chamber 111b in addition to the configuration of the electrolyzed water generator 100 according to the first embodiment.

In the description of the electrolyzed water generator according to the second embodiment, the same reference numerals are given to the substantially same configuration as the electrolyzed water generator 100 according to the first embodiment. It may be omitted or simplified.

[Configuration of electrolyzed water generator]
FIG. 7 is a diagram showing the configuration of the electrolyzed water generator 101 according to the second embodiment.

As shown in FIG. 7, the electrolyzed water generator 101 includes a solution tank 110, a first electrode 112, a second electrode 113, and both ion permeable films, similarly to the electrolyzed water generator 100 according to the first embodiment. It includes 114, a control unit 140, an extraction unit 131a, and an extraction unit 131b. Further, the electrolyzed water generator 101 further includes a first circulation chamber 150a, a second circulation chamber 150b, a supply unit 130a, and a supply unit 130b.

The first circulation chamber 150a is a container that is connected to the first chamber 111a of the solution tank 110 so that the solution contained in the first circulation chamber 150a can be moved. The solution contained in the first circulation chamber 150a may be a solution that does not change the performance of the electrolyzed water generated in the first chamber 111a, and is, for example, water.

The second circulation chamber 150b is a container that is connected to the second chamber 111b of the solution tank 110 so that the solution contained in the second circulation chamber 150b can be moved. The solution contained in the second circulation chamber 150b may be a solution that does not change the performance of the electrolyzed water generated in the second chamber 111b, and is, for example, water.

The supply unit 130a is a pump for taking out the solution contained in the first circulation chamber 150a from the first circulation chamber 150a and supplying it to the first chamber 111a of the solution tank 110.

The supply unit 130b is a pump for taking out the solution contained in the second circulation chamber 150b from the second circulation chamber 150b and supplying it to the second chamber 111b of the solution tank 110.

The take-out unit 131a is a pump for taking out the electrolyzed water contained in the first chamber 111a of the solution tank 110 from the first chamber 111a of the solution tank 110 and supplying it to the first circulation chamber 150a.

The take-out unit 131b is a pump for taking out the electrolyzed water contained in the second chamber 111b of the solution tank 110 from the second chamber 111b of the solution tank 110 and supplying it to the second circulation chamber 150b.

The electrolyzed water generator 101 drives the supply unit 130a and the take-out unit 131a to mix the electrolyzed water contained in the first chamber 111a with the solution contained in the first circulation chamber 150a and circulate the electrolyzed water. ..

Further, the electrolyzed water generator 101 drives the supply unit 130b and the take-out unit 131b to mix the electrolyzed water contained in the second chamber 111b with the solution contained in the second circulation chamber 150b. Circulate.

The take-out section 131a, the take-out section 131b, the supply section 130a, and the supply section 130b may be configured to be independently driveable, and the control section 140 may be configured to drive the take-out section 131a, the take-out section 131b, and the take-out section 131b. The drive of the supply unit 130a and the supply unit 130b may be controlled. In that case, the control unit 140 includes, for example, a control program for driving the take-out unit 131a, the take-out unit 131b, the supply unit 130a, and the supply unit 130b in the memory included in the control unit 140.

Further, for example, the take-out unit 131a and the supply unit 130a may be configured by independent pumps, or may be configured by a device such as one pump capable of bidirectionally sending liquid. That is, the electrolyzed water generator 101 is provided in the first circulation section 132a for circulating the liquid contained in the first circulation chamber 150a and the first chamber 111a, and in the second circulation chamber 150b and the second chamber 111b, respectively. A second circulation unit 132b for circulating the stored liquid is provided. In the present embodiment, the first circulation unit 132a includes an extraction unit 131a and a supply unit 130a, and the second circulation unit 132b includes an extraction unit 131b and a supply unit 130b.

[Effects, etc.]
As described above, the electrolyzed water generator 101 according to the second embodiment has the configuration of the electrolyzed water generator 100 according to the first embodiment, and is further connected to the first chamber 111a and has at least a first circulation chamber for accommodating water. The first circulation unit 132a that circulates the liquid contained in the first circulation chamber 150a and the first chamber 111a, and the second circulation chamber 150b that is connected to the 150a and the second chamber 111b and contains at least water. And a second circulation portion 132b for circulating the liquid contained in the second circulation chamber 150b and the second chamber 111b, respectively.

According to such a configuration, for example, the electrolyzed water generated in the first chamber 111a of the solution tank 110 is moved to the first circulation chamber 150a, so that the electrolyzed water is moved to the first chamber 111a and the first circulation chamber 150a. As the contained liquid, the contact area with the both ion permeable membrane 114 can be reduced as compared with the case where the first circulation chamber 150a is not provided. Further, for example, the electrolyzed water generated in the first chamber 111a of the solution tank 110 is moved to the first circulation chamber 150a, so that it is a liquid contained in the first chamber 111a and the first circulation chamber 150a. Can reduce the contact area with the both ion permeable membrane 114 as compared with the case where the first circulation chamber 150a is not provided. Therefore, according to the electrolyzed water generator 101 according to the second embodiment, in addition to the effect obtained by the electrolyzed water generator 100 according to the first embodiment, for example, sodium chloride is added to the third chamber 111c. In this case, it becomes difficult for the sodium ions to move to the main anode electrode (first electrode 112 in the present embodiment), and when the electrolyzed water on the main anode electrode side is taken out from the extraction portion 131a, the sodium ions are taken out at the same time. Can be suppressed. Further, according to such a configuration, it is possible to suppress a decrease in the bactericidal effect of the electrolyzed water generated on the main anode electrode side. Further, according to such a configuration, the solution in the solution tank 110 can be easily stirred as compared with the case where the capacity of the solution tank 110 is simply increased, so that the next solution in the solution tank 110 can be easily stirred. It is possible to suppress uneven concentration of chlorous acid, chlorine ions and the like, and to generate more electrolyzed water.

(Embodiment 3)
Subsequently, the electrolyzed water generator according to the third embodiment will be described with reference to FIGS. 8 and 9.

The electrolyzed water generator 101 according to the second embodiment circulates the solution in the first chamber 111a to the first circulation chamber 150a and circulates the solution in the second chamber 111b to the second circulation chamber 150b. In the solution tank of the electrolyzed water generator according to the third embodiment, one flow path is from a supply port for flowing water into the solution tank to an outlet for taking out the electrolyzed water generated in the solution tank. It is formed.

In the description of the electrolyzed water generator according to the third embodiment, the configuration is substantially the same as that of the electrolyzed water generator 100 according to the first embodiment and the electrolyzed water generator 101 according to the second embodiment. The duplicated description may be omitted or simplified.

[Configuration of electrolyzed water generator]
FIG. 8 is a diagram showing the configuration of the electrolyzed water generator 102 according to the third embodiment. FIG. 9 is a diagram showing details of the internal configuration of the second chamber 211b of the solution tank 110a included in the electrolyzed water generator 102 according to the third embodiment. In FIG. 9, in order to explain the details of the internal configuration of the second chamber 211b of the solution tank 110a, the configurations of the first electrode 112, the second electrode 113, the supply portions 130c and 130d, the take-out portions 131a and 131b, and the like are configured. The elements are not shown. The white arrows shown in FIGS. 8 and 9 indicate the flow directions of the solution such as water flowing into the solution tank 110a and the liquid such as electrolyzed water taken out from the solution tank 110a.

As shown in FIG. 8, the electrolyzed water generator 102 includes a solution tank 110a, a first electrode 112, a second electrode 113, both ion permeable membranes 114, a control unit 140, and extraction units 131a and 131b. To be equipped with. Further, the electrolyzed water generator 102 further includes a container 160 and supply units 130c and 130d.

The solution tank 110a is a container that houses a solution containing at least an electrolyte. Specifically, the solution tank 110a is an electrolytic cell for electrolyzing the contained solution. More specifically, the electrolyte contains chloride ions and the solution is an aqueous solution containing chloride ions.

The solution is, for example, water to which a material containing chlorine ions such as sodium chloride and hydrogen chloride has been added. Specifically, the inside of the solution tank 110a is divided into a first chamber 211a, a second chamber 211b, and a third chamber 111c by two amphoteric ion permeable membranes 114. Before the solution in the solution tank 110a is electrolyzed by the first electrode 112 and the second electrode 113, for example, the first chamber 211a and the second chamber 211b contain water, and the third chamber 111c Contains water containing sodium chloride. By energizing the first electrode 112 and the second electrode 113 provided in the solution tank 110a, the solution in the solution tank 110a is electrolyzed and electrolyzed water containing hypochlorous acid (specifically, , Acid electrolyzed water) is produced.

The material of the solution tank 110a is not particularly limited as long as it is a material that is less likely to be corroded by an aqueous solution containing chlorine and electrolyzed water containing hypochlorous acid generated by electrolyzing the aqueous solution.

The first electrode 112 and the second electrode 113 are a pair of electrodes for electrolyzing the solution in the solution tank 110a. The first electrode 112 is provided in the first chamber 211a, and the second electrode 113 is provided in the second chamber 211b. The solution tank 110a is partitioned by two amphoteric ion permeable membranes 114 between the first chamber 211a having the first electrode 112, the second chamber 211b having the second electrode 113, and the first chamber 111a and the second chamber 111b. It has a third chamber 111c and the like.

The container 160 is a container that is housed in the solution tank 110a and holds a solution (for example, water) before being electrolyzed. The container 160 is connected to the first chamber 211a and the second chamber 211b so that the solution contained in the container 160 can be fed. Although two containers 160 are shown in FIG. 8, only one container 160 may be used as long as the solution contained in the container 160 can be sent to the first chamber 211a and the second chamber 211b.

The supply units 130c and 130d are pumps for supplying the solution contained in the container 160 to the first chamber 211a and the second chamber 211b.

The supply unit 130c, the supply unit 130d, the take-out unit 131a, and the take-out unit 131b may be configured so that they can be driven independently, and the control unit 140 is the supply unit 130c, the supply unit 130d, and the take-out unit. You may control the drive of 131a and 131b of the take-out unit. In that case, the control unit 140 includes, for example, a control program for driving the supply unit 130c, the supply unit 130d, the take-out unit 131a, and the take-out unit 131b in the memory included in the control unit 140.

Further, as shown in FIG. 9, the second chamber 211b of the solution tank 110a is formed with a supply port 220b which is a through hole for supplying the solution in the container 160 into the second chamber 211b. The supply port 220b is connected to one end of the flow path 300. Further, the second chamber 211b of the solution tank 110a is formed with an outlet 230b which is a through hole for taking out the electrolyzed water in the second chamber 211b from the second chamber 211b. The outlet 230b is connected to the other end of the flow path 300 connected to the supply port 220b, which is opposite to one end. As described above, inside the second chamber 211b, a flow path structure for sending a solution such as water supplied to the inside in one direction is formed. The flow path 300 is formed, for example, by providing a wall portion 220 or the like that regulates the flow of the solution inside the second chamber 211b. The wall portion 220 is formed of, for example, a material of the same quality as the solution tank 110a.

Further, as shown in FIG. 8, the first chamber 211a of the solution tank 110a is formed with a supply port 220a which is a through hole for supplying the solution in the container 160 into the first chamber 211a. The supply port 220a is connected to one end of a flow path (not shown) formed in the first chamber 211a. Further, in the first chamber 211a of the solution tank 110a, an outlet 230a which is a through hole for taking out the electrolyzed water in the first chamber 211a from the first chamber 211a is formed. The outlet 230a is connected to the other end of the flow path (not shown) connected to the supply port 220a, which is opposite to one end. That is, the flow path structure is also formed in the first chamber 211a as in the second chamber 211b shown in FIG.

As described above, the first chamber 211a and the second chamber 211b each have at least a supply port 220a or a supply port 220b to which water is supplied, and an outlet 230a or 220b for taking out the generated electrolyzed water. Further, the first chamber 211a includes a flow path extending from the supply port 220a to the outlet 230a. Further, one of the second chambers 211b is provided with a flow path 300 extending from the supply port 220b to the outlet 230b.

It should be noted that at least one of the first chamber 211a and the second chamber 211b may be provided with a flow path that continues from the supply port for supplying water to the outlet for taking out the electrolyzed water.

[Effects, etc.]
As described above, the first chamber 211a and the second chamber 211b of the electrolyzed water generator 102 according to the third embodiment have at least the supply ports 220a and 220b to which water is supplied, and the first electrode 112 and the second electrode 113, respectively. It has outlets 230a and 230b for taking out the electrolyzed water generated by applying a voltage. At least one of the first chamber 211a and the second chamber 211b is provided with a flow path extending from the supply port to the outlet. In the third embodiment, both the first chamber 211a and the second chamber 211b are provided with a flow path extending from the supply port to the outlet. FIG. 9 shows, as an example, a flow path 300 extending from the supply port 220b to the outlet 230b included in the second chamber 211b.

According to such a configuration, at least one of the inside of the first chamber 211a and the inside of the second chamber 211b of the solution tank 110a is formed with a flow path 300 through which the solution contained therein flows in only one direction. Therefore, the contact time with the both ion permeable membranes 114 can be easily controlled by appropriately setting the shape of the flow path 300. Therefore, according to the electrolyzed water generator 102 according to the third embodiment, in addition to the effect obtained by the electrolyzed water generator 100 according to the first embodiment, for example, sodium chloride is added to the third chamber 111c. In this case, it becomes difficult for the sodium ions to move to the main anode electrode (first electrode 112 in the present embodiment), and when the electrolyzed water on the main anode electrode side is taken out from the outlet 230a, the sodium ions are taken out at the same time. Can be suppressed. Further, according to such a configuration, it is possible to suppress a decrease in the bactericidal effect of the electrolyzed water generated on the main anode electrode side.

(Other embodiments)
Although the electrolyzed water generator according to the first, second and third embodiments has been described above, the present invention is not limited to the above embodiment.

For example, in the above embodiment, the solution tanks 110 and 110a have three chambers 111a and 211a, which are separated by two amphoteric ion permeable membranes 114, second chambers 111b and 211b, and a third chamber 111c. Equipped with. By doing so, for example, it is possible to suppress the inclusion of sodium ions as impurities in the acidic electrolyzed water containing hypochlorous acid generated in the first chambers 111a and 211a by electrolyzing the solution containing sodium chloride. Therefore, it is possible to suppress a decrease in the bactericidal effect of the acidic electrolyzed water. However, the configurations of the solution tanks 110 and 110a are not limited to this. The solution tanks 110 and 110a may have a structure including, for example, two chambers, a first chamber and a second chamber, which are partitioned by one amphoteric ion permeable membrane 114 arranged between the first electrode 112 and the second electrode 113. good. By doing so, the structure of the solution tank becomes simpler than the structure of three chambers.

Further, the present invention may be realized as a method executed by the electrolyzed water generator according to each of the above embodiments. That is, in the present invention, in the solution tank 110 including the first electrode 112 and the second electrode 113, the arrangement step of arranging the both ion permeable film 114 between the first electrode 112 and the second electrode 113 and the second electrode The first energization step of energizing for the first time in the first energization direction, which is the energization direction in which a positive or negative voltage is applied to the first electrode 112 when 113 is used as a reference, and the direction opposite to the first energization direction. An electrolyzed water generation method may also include a control step of repeatedly switching the second energization step of energizing in the second energization direction for a second time different from the first time.

According to such a method, the pH of the generated electrolyzed water can be easily controlled. For example, when the electrolyte contains chloride ions, the pH of the electrolyzed water is a predetermined value (for example, pH 4.0 to 6.5) suitable for effectively producing hypochlorous acid having a high bactericidal effect. Degree) can be.

For example, in the control step, the energization direction in which the first electrode 112 and the second electrode 113 are energized is repeatedly switched so that the first time with respect to the second time is 1.05 or more and 1.5 or less.

According to such a method, the pH of the electrolyzed water on the main anode electrode side can be suitably adjusted to pH in order to generate hypochlorous acid. Therefore, according to such a method, it is possible to suppress a decrease in the bactericidal effect of the electrolyzed water generated on the main anode electrode side.

Further, for example, in the control step, the second energization step is started.

According to such a method, it is possible to prevent the pH of the electrolyzed water on the main anode electrode side from dropping rapidly. If the pH drops too low, the risk of chlorine gas generation increases. However, according to such a method, since the pH of the electrolyzed water on the main anode electrode side is suppressed from rapidly decreasing, hypochlorous acid having a high bactericidal effect is generated while suppressing the generation of chlorine gas. be able to.

In addition, it is realized by applying various modifications to each embodiment that can be conceived by those skilled in the art, or by arbitrarily combining the components and functions in each embodiment within the range not deviating from the gist of the present invention. Also included in the present invention.

100, 101, 102 Electrolyzed water generator 110, 110a Solution tank 111a, 211a First chamber 111b, 211b Second chamber 111c Third chamber 112 First electrode (main anode electrode)
113 Second electrode (main cathode electrode)
114 Both ion permeable membrane 132a First circulation part 132b Second circulation part 140 Control part 150a First circulation chamber 150b Second circulation chamber 220a, 220b Supply port 230a, 230b Outlet 300 Flow path

Claims (12)

A solution tank containing a solution containing at least an electrolyte,
The first electrode provided in the solution tank and
A second electrode provided in the solution tank and paired with the first electrode,
An at least one amphoteric permeable membrane provided in the solution tank and located between the first electrode and the second electrode.
When the second electrode is used as a reference, the first electrode is energized for the first time in the first energizing direction, which is the energizing direction in which a positive or negative voltage is applied, and the direction opposite to the first energizing direction. An electrolyzed water generator including a control unit that repeatedly switches the energization direction so as to energize in the second energization direction for a second time different from the first time.
The solution tank
The first chamber provided with the first electrode and
A second chamber provided with the second electrode and
It has a third chamber partitioned by two both ion permeable membranes between the first chamber and the second chamber.
The third chamber contains the solution containing at least the electrolyte.
The electrolyzed water generator further
A first circulation chamber connected to the first chamber and at least accommodating water,
A second circulation chamber connected to the second chamber and at least accommodating water,
A first circulation unit that circulates the liquid contained in the first circulation chamber and the first chamber, respectively.
An electrolyzed water generator including a second circulation unit for circulating a liquid contained in the second circulation chamber and the second chamber, respectively. The electrolyte contains chloride ions and
The electrolyzed water generator according to claim 1 , wherein the first electrode and the second electrode generate electrolyzed water containing hypochlorous acid by applying a voltage. The first energizing direction is an energizing direction in which a positive voltage is applied to the first electrode when the second electrode is used as a reference.
The first hour is longer than the second hour.
The control unit energizes the first electrode and the second electrode so that the minimum pH value of the electrolyzed water containing hypochlorous acid in the first chamber is 4.0 or more. 2. The electrolyzed water generator according to claim 2. A solution tank containing a solution containing at least an electrolyte,
The first electrode provided in the solution tank and
A second electrode provided in the solution tank and paired with the first electrode,
An at least one amphoteric permeable membrane provided in the solution tank and located between the first electrode and the second electrode.
When the second electrode is used as a reference, the first electrode is energized for the first time in the first energizing direction, which is the energizing direction in which a positive or negative voltage is applied, and the direction opposite to the first energizing direction. A control unit that repeatedly switches the energization direction so as to energize in the second energization direction for a second time different from the first time is provided .
The solution tank
The first chamber provided with the first electrode and
A second chamber provided with the second electrode and
It has a third chamber partitioned by two both ion permeable membranes between the first chamber and the second chamber.
The third chamber contains the solution containing at least the electrolyte.
The electrolyte contains chloride ions and
When a voltage is applied to the first electrode and the second electrode, electrolyzed water containing hypochlorous acid is generated.
The first energizing direction is an energizing direction in which a positive voltage is applied to the first electrode when the second electrode is used as a reference.
The first hour is longer than the second hour.
The control unit energizes the first electrode and the second electrode so that the minimum pH value of the electrolyzed water containing hypochlorous acid in the first chamber is 4.0 or more. Electrolyzed water generator that repeatedly switches between. Moreover,
A first circulation chamber connected to the first chamber and at least accommodating water,
A second circulation chamber connected to the second chamber and at least accommodating water,
A first circulation unit that circulates the liquid contained in the first circulation chamber and the first chamber, respectively.
The electrolyzed water generating apparatus according to claim 4 , further comprising a second circulating portion for circulating a liquid contained in the second circulating chamber and the second chamber, respectively. The first room and the second room are each
At least the water supply port and
It has an outlet for taking out electrolyzed water generated by applying a voltage to the first electrode and the second electrode.
The electrolyzed water generator according to any one of claims 1 to 5, wherein at least one of the first chamber and the second chamber includes a flow path extending from the supply port to the outlet. The control unit repeatedly switches the energizing direction of energizing the first electrode and the second electrode so that the first time is 1.05 or more and 1.5 or less with respect to the second time. 6. The electrolyzed water generator according to any one of 6. The electrolyzed water generator according to claim 7, wherein the control unit starts energization from the second energization direction. In a solution tank provided with a first electrode and a second electrode, an arrangement step of arranging both ion permeable membranes between the first electrode and the second electrode, and
The first energization step of energizing for the first time in the first energization direction, which is the energization direction in which a positive or negative voltage is applied to the first electrode when the second electrode is used as a reference, and the first energization direction. Is an electrolyzed water generation method including a control step of repeatedly switching a second energization step of energizing for a second time different from the first time in the second energization direction in the opposite direction.
The solution tank
The first chamber provided with the first electrode and
A second chamber provided with the second electrode and
It has a third chamber partitioned by two both ion permeable membranes between the first chamber and the second chamber.
The third chamber contains a solution containing at least an electrolyte.
The electrolyzed water generation method further comprises
A first circulation step that is connected to the first chamber and circulates a liquid contained in at least the first circulation chamber and the first chamber, respectively.
A method for generating electrolyzed water , which comprises a second circulation chamber connected to the second chamber and at least accommodating water, and a second circulation step of circulating a liquid contained in each of the second chambers. In a solution tank provided with a first electrode and a second electrode, an arrangement step of arranging both ion permeable membranes between the first electrode and the second electrode, and
The first energization step of energizing for the first time in the first energization direction, which is the energization direction in which a positive or negative voltage is applied to the first electrode when the second electrode is used as a reference, and the first energization direction. the second current direction opposite directions, seen including a control step for the second energization step of energizing different second time, repeating switched from the first hour,
The solution tank
The first chamber provided with the first electrode and
A second chamber provided with the second electrode and
It has a third chamber partitioned by two both ion permeable membranes between the first chamber and the second chamber.
The third chamber contains a solution containing at least an electrolyte.
The electrolyte contains chloride ions and
When a voltage is applied to the first electrode and the second electrode, electrolyzed water containing hypochlorous acid is generated.
The first energizing direction is an energizing direction in which a positive voltage is applied to the first electrode when the second electrode is used as a reference.
The first hour is longer than the second hour.
In the control step, the energization direction in which the first electrode and the second electrode are energized so that the minimum pH value of the electrolyzed water containing hypochlorous acid in the first chamber is 4.0 or more. Electrolyzed water generation method that repeatedly switches between. In the control step, claim 9 or claim 9 or that the energization direction for energizing the first electrode and the second electrode is repeatedly switched so that the first time with respect to the second time is 1.05 or more and 1.5 or less. 10. The method for producing electrolyzed water according to 10. The electrolyzed water generation method according to claim 11 , wherein the control step is started from the second energization step.

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