Electrolytic water generator and electrolytic water generation method

Abstract

To provide an electrolytic water generator capable of stably generating electrolytic water of any dissolved hydrogen concentration.SOLUTION: An electrolytic water generator 1 includes an electrolytic unit 3 for generating electrolytic water in which hydrogen is dissolved by electrolysis of supplied raw water, and a mixing part 7 for mixing the first electrolytic water generated by the electrolytic unit with the second electrolytic water or water with lower dissolved hydrogen concentration than the first electrolytic water at an arbitrary ratio.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an electrolyzed water generator and the like.

Background Art

[0002] In recent years, dialysis treatment using electrolyzed water generated by an electrolyzed water generator has attracted attention. For example, it is known that electrolyzed hydrogen water in which hydrogen gas generated by electrolyzing water is dissolved contributes to reducing the oxidative stress of patients (see, for example, Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In large-scale hospitals and the like, dialysis treatment is performed on a large number of patients simultaneously. For this reason, the electrolyzed water generator is provided with a tank for storing a large amount of electrolyzed water.

[0005] On the other hand, dialysis treatment is not usually performed constantly, and there are also time zones when the electrolyzed water in the tank is not consumed. In such time zones, in order to suppress an excessive increase in the dissolved hydrogen concentration of the electrolyzed water, the circulation of the electrolyzed water between the tank and the electrolysis unit and the electrolysis in the electrolysis unit are stopped, and the electrolyzed water in the tank is kept in the tank and waits without being electrolyzed.

[0006] However, the dissolved hydrogen concentration gradually decreases due to the escape of the hydrogen gas dissolved from the electrolyzed water in the standby state.

[0007] The present invention has been devised in view of the above actual situation, and the main object thereof is to provide an electrolyzed water generator or the like that can stably generate electrolyzed water having an arbitrary dissolved hydrogen concentration.

Means for Solving the Problems

[0008] The present invention is an electrolyzed water generator, an electrolysis unit for generating first electrolyzed water in which hydrogen is dissolved by electrolyzing the supplied raw water, and a mixing unit for mixing the first electrolyzed water generated by the electrolysis unit and second electrolyzed water or water having a dissolved hydrogen concentration lower than that of the first electrolyzed water at an arbitrary mixing ratio.

Effects of the Invention

[0009] In the electrolyzed water generator of the present invention, since the mixing unit mixes the first electrolyzed water and second electrolyzed water or water having a dissolved hydrogen concentration lower than that of the first electrolyzed water at an arbitrary mixing ratio, electrolyzed water having an arbitrary dissolved hydrogen concentration can be stably generated.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of an electrolyzed water generator 1 according to the present embodiment. The electrolyzed water generator 1 is a device for generating electrolyzed water and is connected to a dialysate preparation device 100 for preparing a dialysate. The electrolyzed water generator 1 supplies the generated electrolyzed water to the dialysate preparation device 100.

[0012] The electrolyzed water generator 1 includes an electrolysis unit 3 for generating first electrolyzed water from the supplied raw water, and a mixing unit 7 for mixing the first electrolyzed water generated by the electrolysis unit 3 and water at an arbitrary ratio. Further, the electrolyzed water generator 1 includes a control unit 10 that controls the entire device.

[0013] Tap water is generally used as the raw water supplied to the electrolysis unit 3, but other types of water such as well water and groundwater can also be used. The raw water is stored in a raw water tank (not shown), subjected to pretreatment such as softening, and then supplied to the electrolysis unit 3 via a water supply valve (not shown).

[0014] FIG. 2 shows the electrolysis unit 3. The electrolysis unit 3 includes an electrolytic cell 4. When the dialysate prepared by the dialysate preparation device 100 is used for dialysis of a large number of patients, as shown in FIG. 2, it is desirable that the electrolysis unit 3 be configured to include a plurality of electrolytic cells 4. The plurality of electrolytic cells 4 are connected in parallel to each other as flow paths. By operating such a plurality of electrolytic cells 4 simultaneously, a large amount of electrolyzed water can be generated quickly.

[0015] The electrolytic cell 4 includes an electrolysis chamber 40, an anode feeder 41, a cathode feeder 42, and a diaphragm 43. The electrolysis chamber 40 is partitioned by the diaphragm 43 into an anode chamber 40a in which the anode feeder 41 is disposed and a cathode chamber 40b in which the cathode feeder 42 is disposed. The raw water is supplied to the anode chamber 40a and the cathode chamber 40b via, for example, a bifurcated flow path (not shown).

[0016] The voltage applied between the anode power supply 41 and the cathode power supply 42 is controlled by the control unit 10. The control unit 10 performs feedback control on the electrolytic voltage applied to the anode power supply 41 and the cathode power supply 42 so that the electrolytic current supplied to the anode power supply 41 and the cathode power supply 42 becomes a preset desired value. For example, when the electrolytic current is excessive, the control unit 10 decreases the voltage, and when the electrolytic current is too small, the control unit 10 increases the voltage. Thereby, the electrolytic current is appropriately controlled.

[0017] Among the electrolyzed water electrolyzed in the electrolytic cell 4, the electrolyzed water generated in the cathode chamber 40b is sent to the mixing section 7 as cathode water. On the other hand, the electrolyzed water generated in the anode chamber 40a is discharged to the outside of the electrolyzed water generating apparatus 1 as anode water.

[0018] When water is electrolyzed in the electrolytic cell 4, oxygen gas is generated in the anode chamber 40a, and hydrogen gas is generated in the cathode chamber 40b.

[0019] The oxygen gas generated in the anode chamber 40a dissolves in the electrolyzed water in the anode chamber 40a, is taken out from the anode chamber 40a as anode water, and is discharged to the outside of the electrolyzed water generating apparatus 1.

[0020] The hydrogen gas generated in the cathode chamber 40b dissolves in the electrolyzed water in the cathode chamber 40b, is taken out from the cathode chamber 40b as cathode water, and is sent to the mixing section 7. That is, the cathode water sent from the cathode chamber 40b of the electrolysis unit 3 to the mixing section 7 is electrolyzed hydrogen water in which hydrogen gas is dissolved after being electrolyzed in the cathode chamber 40b.

[0021] When the electrolyzed water is used for dialysis treatment, the electrolyzed water generated in the cathode chamber 40b is supplied to the mixing section 7. When the electrolyzed water is used for applications other than dialysis treatment, the electrolyzed water generated in the anode chamber 40a may be supplied to the mixing section 7.

[0022] As shown in FIG. 1, the mixing unit 7 mixes the electrolyzed water generated in the cathode chamber 40b of the electrolysis unit 3 with water. The water mixed with the electrolyzed hydrogen water by the mixing unit 7 is water having a dissolved hydrogen concentration lower than that of the first electrolyzed water generated by the electrolysis unit 3. Therefore, the water is the second electrolyzed water that has been electrolyzed or non-electrolyzed water that has not been electrolyzed.

[0023] In the present application, the water simply described as "water" is the second electrolyzed water or non-electrolyzed water having a dissolved hydrogen concentration lower than that of the first electrolyzed water generated by the electrolysis unit 3. Note that, as long as the dissolved hydrogen concentration is lower than that of the first electrolyzed water, the electrolyzed water generated by the electrolysis unit 3 may be applied to the second electrolyzed water.

[0024] It is desirable that the dissolved hydrogen concentration of the second electrolyzed water mixed with the first electrolyzed water generated by the electrolysis unit 3 in the mixing unit 7 is known. The dissolved hydrogen concentration of the electrolyzed water is obtained by a sensor equivalent to the sensor 8 described later.

[0025] The mixing unit 7 mixes the first electrolyzed water generated by the electrolysis unit 3 and water at an arbitrary ratio. In this electrolyzed water generator 1, the first electrolyzed water generated by the electrolysis unit 3 is diluted by mixing with water in the mixing unit 7, whereby electrolyzed water having a desired dissolved hydrogen concentration can be generated. Therefore, by changing the mixing ratio of the first electrolyzed water and water in the mixing unit 7, electrolyzed water having an arbitrary dissolved hydrogen concentration can be stably generated.

[0026] It is desirable that the mixing unit 7 includes a mixing valve capable of adjusting the mixing ratio of the first electrolyzed water generated by the electrolysis unit 3 and water. The mixing ratio of the mixing unit 7 is controlled by the control unit 10.

[0027] The control unit 10 controls each part of the electrolyzed water generator 1. The control unit 10 has, for example, a CPU (Central Processing Unit) that executes various arithmetic processes, information processes, etc., and a memory that stores a program that controls the operation of the CPU and various information. Various functions of the control unit 10 are realized by the CPU, the memory, and the program.

[0028] It is desirable that a sensor 8 for measuring the dissolved hydrogen concentration of the mixed water mixed in the mixing section 7 be provided in the flow path on the downstream side of the mixing section 7. The sensor 8 outputs an electric signal corresponding to the measured dissolved hydrogen concentration to the control section 10.

[0029] Based on the electric signal output from the sensor 8, the control section 10 obtains the dissolved hydrogen concentration of the mixed water. Then, the mixing ratio of the mixing section 7 is feedback-controlled so that the mixed water has a desired dissolved hydrogen concentration.

[0030] The control section 10 may be configured to control the electrolysis current of the electrolysis unit 3 based on the output from the sensor 8. In such a configuration, the dissolved hydrogen concentration of the first electrolyzed water generated by the electrolysis unit 3 and supplied to the mixing section 7 is adjusted. For example, when the control section 10 greatly controls the electrolysis current of the electrolysis unit 3, mixed water with a high dissolved hydrogen concentration can be obtained. When the control section 10 slightly controls the electrolysis current of the electrolysis unit 3, the dissolved hydrogen concentration of the mixed water is more accurately adjusted.

[0031] Note that a pump 82 for sending the mixed water to the dialysate preparation device 100 is provided as needed in the flow path 81 from the sensor 8 to the dialysate preparation device 100.

[0032] FIG. 3 shows the procedure of an electrolyzed water generation method 500 for generating electrolyzed water using the electrolyzed water generation device 1. Although it is preferable to apply the electrolyzed water generation device 1 to the implementation of the electrolyzed water generation method 500, it is not necessarily required to use the electrolyzed water generation device 1 as long as the following procedure is followed.

[0033] The electrolyzed water generation method 500 includes a first step S10 of generating first electrolyzed water in which hydrogen is dissolved, and a second step S20 of mixing the first electrolyzed water generated in the first step S10 with water.

[0034] The first step S10 is realized by electrolyzing the raw water supplied to the electrolysis unit 3. The second step S20 is realized by the mixing unit 7 mixing the first electrolyzed water and water at an arbitrary ratio.

[0035] In this electrolyzed water generation method 500, the first electrolyzed water generated in the first step S10 is diluted by mixing with water in the second step S20, whereby electrolyzed water with a desired dissolved hydrogen concentration can be generated. Therefore, by changing the mixing ratio of the first electrolyzed water and water in the second step S20, electrolyzed water with an arbitrary dissolved hydrogen concentration can be stably generated.

[0036] FIG. 4 is a block diagram of an electrolyzed water generation device 1A, which is a modified example of the electrolyzed water generation device 1 in FIG. 1. For the parts not described below in the electrolyzed water generation device 1A, the configuration of the above-described electrolyzed water generation device 1 can be adopted.

[0037] The electrolyzed water generation device 1A is different from the above-described electrolyzed water generation device 1 in that it includes a first tank 5 for storing the first electrolyzed water generated by the electrolysis unit 3. The first tank 5 is arranged between the electrolysis unit 3 and the mixing unit 7. With such a configuration, it becomes possible to supply a large amount of electrolyzed water to the dialysate preparation device 100 at one time, and it is easily adaptable to dialysis treatment for a large number of people. A pump (not shown) is provided in the water channel connecting the first tank 5 and the mixing unit 7 as needed.

[0038] Preferably, the electrolyzed water generation device 1A further includes a circulation water channel 51 for circulating the first electrolyzed water between the first tank 5 and the electrolysis unit 3. A pump 52 for sending the first electrolyzed water from the first tank 5 to the electrolysis unit 3 is provided in the circulation water channel 51 as needed.

[0039] The electrolyzed water generation device 1A includes, as an operation mode, a re-electrolysis mode in which the first electrolyzed water in the first tank 5 is moved to the electrolysis unit 3 and electrolyzed again. That is, the electrolyzed water generation device 1A includes a re-electrolysis mode in which the electrolysis unit 3 electrolyzes the first electrolyzed water again while circulating it through the circulation water path 51. The first electrolyzed water circulating through the circulation water path 51 may be electrolyzed water mixed with raw water. In this case, the amount of the first electrolyzed water in the first tank 5 can be easily ensured.

[0040] In the re-electrolysis mode, the electrolysis unit 3 and the pump 52 are simultaneously operated by the control unit 10. The dissolved hydrogen concentration of the first electrolyzed water stored in the first tank 5 decreases with the passage of time. In the present embodiment, the dissolved hydrogen concentration of the first electrolyzed water in the first tank 5 is maintained or increased by the re-electrolysis mode.

[0041] It is desirable that the re-electrolysis mode increases the dissolved hydrogen concentration of the first electrolyzed water in the first tank 5 to the saturated hydrogen concentration. By such a re-electrolysis mode, the dissolved hydrogen concentration of the mixed water can be easily increased. Also, the dissolved hydrogen concentration of the mixed water becomes stable.

[0042] FIG. 5 is a block diagram of an electrolyzed water generation device 1B which is a modified example of the electrolyzed water generation device 1A of FIG. 4. For the parts not described below in the electrolyzed water generation device 1B, the configurations of the above-described electrolyzed water generation devices 1 and 1A may be adopted.

[0043] The electrolyzed water generation device 1B is different from the above-described electrolyzed water generation device 1A in that it includes a second tank 6 for storing water supplied to the mixing unit 7. With such a configuration, it becomes possible to supply a large amount of electrolyzed water to the dialysate preparation device 100 at once in combination with the first tank 5, and it is easily adaptable to dialysis treatment for a large number of people. A pump (not shown) is provided in the water path connecting the second tank 6 and the mixing unit 7 as necessary.

[0044] In the electrolyzed water generation device 1B, it is desirable that the first electrolyzed water with a saturated hydrogen concentration is stored in the first tank 5, and non-electrolyzed water that has not been electrolyzed is stored in the second tank 6. With such a configuration, the adjustment range of the dissolved hydrogen concentration in the mixed water is expanded.

[0045] FIG. 6 shows the procedure of an electrolyzed water generation method 500B for generating electrolyzed water using the electrolyzed water generation device 1B. Although it is preferable to apply the electrolyzed water generation device 1B for the implementation of the electrolyzed water generation method 500B, it is not necessarily required to use the electrolyzed water generation device 1B as long as the following procedure is followed.

[0046] The electrolyzed water generation method 500B includes a first step S10, a step S11 of storing the first electrolyzed water generated in the first step S10 in the first tank 5, a step S12 of storing water having a lower dissolved hydrogen concentration than the first electrolyzed water generated in the first step S10 in the second tank 6, and a second step S20 of mixing the first electrolyzed water stored in the step S11 and the water stored in the step S12.

[0047] In this electrolyzed water generation method 500B, by storing the first electrolyzed water in the first tank 5 in step S11 and storing water in the second tank 6 in step S12, it becomes possible to supply a large amount of electrolyzed water at once, which can be easily adapted to dialysis treatment for a large number of people.

[0048] FIG. 7 is a block diagram of an electrolyzed water generation device 1C, which is a modified example of the electrolyzed water generation device 1B in FIG. 5. For parts not described below in the electrolyzed water generation device 1C, the configurations of the above-described electrolyzed water generation devices 1, 1A, and 1B can be adopted.

[0049] The electrolyzed water generation device 1C is different from the above-described electrolyzed water generation device 1A in that it includes a filtration unit 9 for purifying the first electrolyzed water generated by the electrolysis unit 3. The filtration unit 9 of this embodiment is arranged on the downstream side of the electrolysis unit 3.

[0050] Note that the filtration unit 9 may be arranged on the upstream side of the electrolysis unit 3. Such a filtration unit 9 purifies raw water that has been subjected to pretreatment such as softening and supplies it to the electrolysis unit 3. In such a configuration, an electrolyzed water generator is realized by connecting the electrolysis unit 3 or the like to the downstream side of a device used for hemodialysis treatment without electrolysis, and the introduction barrier for hemodialysis using electrolyzed water is reduced.

[0051] The filtration unit 9 of the present embodiment has a reverse osmosis membrane 9a. A pump 93 for pumping first electrolyzed water or the like to the filtration unit 9 is arranged in a flow path 92 between the electrolysis unit 3 and the filtration unit 9. With such a configuration, it becomes possible to supply the dialysis solution preparation device 100 with electrolyzed water that has been subjected to reverse osmosis treatment without separately requiring a reverse osmosis treatment device.

[0052] When the electrolyzed water generator 1C is used for hemodialysis treatment, the filtration unit 9 may utilize a filtration form other than reverse osmosis treatment that satisfies the standards for dialysis water, for example, an ion exchange (EDI: Electro-deionization) module. Also, when the electrolyzed water generated by the electrolyzed water generator 1C is used for applications other than hemodialysis, a filtration form having a purification ability corresponding to the application may be used.

[0053] As shown in FIG. 7, in the electrolyzed water generator 1C in which the filtration unit 9 is arranged on the downstream side of the electrolysis unit 3, it is desirable to provide a first branch flow path 91 on the upstream side of the electrolysis unit 3.

[0054] The first branch flow path 91 includes a first flow path 91a for supplying raw water to the electrolysis unit 3 and a second flow path 91b for supplying raw water to the filtration unit 9. In the present embodiment, a switching valve 91c for switching the flow path is provided at the branch portion between the first flow path 91a and the second flow path 91b as needed. Also, the second flow path 91b is connected to the flow path 92 between the electrolysis unit 3 and the pump 93. A switching valve 91d for switching the flow path is provided at the connection portion between the second flow path 91b and the flow path 92 as needed. The switching valves 91c and 91d are controlled by the control unit 10.

[0055] With such a first branch channel 91, the first electrolyzed water or raw water can be selectively supplied to the filtration unit 9. By the first channel 91a and the filtration unit 9, it becomes possible to perform reverse osmosis treatment on the first electrolyzed water. By the second channel 91b and the filtration unit 9, it becomes possible to perform reverse osmosis treatment on the raw water.

[0056] In addition, when the raw water passes through the electrolysis unit 3, by stopping the supply of the electrolysis current to the anode power supply 41 and the cathode power supply 42, it is also possible to supply the raw water to the filtration unit 9. Thus, by controlling the electrolysis unit 3, it is also possible to omit the second channel 91b from the electrolyzed water generator 1C.

[0057] As shown in FIG. 7, it is desirable that the electrolyzed water generator 1C be provided with a second branch channel 94 on the downstream side of the filtration unit 9.

[0058] The second branch channel 94 includes a third channel 94c for supplying the first electrolyzed water filtered by the filtration unit 9 to the first tank 5, and a fourth channel 94d for supplying the water (raw water) filtered by the filtration unit 9 to the second tank 6. In the present embodiment, a switching valve 94e for switching the channels is provided at the branch portion between the third channel 94c and the fourth channel 94d as needed. The switching valve 91e is controlled by the control unit 10.

[0059] The control unit 10 controls the electrolysis unit 3 and the switching valves 91c, 91d, 94e in conjunction. With such an electrolyzed water generator 1C, the first electrolyzed water subjected to reverse osmosis treatment can be supplied to the first tank 5, and the second electrolyzed water or water subjected to reverse osmosis treatment can be supplied to the second tank 6.

[0060] As described above, the electrolyzed water generator 1 of the present invention has been described in detail, but the present invention is not limited to the above specific embodiments and can be implemented in various modes.

[0061] [Appendix] The present invention includes the following aspects.

[0062] [Invention 1] An electrolyzed water generator, an electrolysis unit for generating first electrolyzed water in which hydrogen is dissolved by electrolyzing supplied raw water; and a mixing section for mixing the first electrolyzed water generated by the electrolysis unit and second electrolyzed water or water having a dissolved hydrogen concentration lower than that of the first electrolyzed water at an arbitrary mixing ratio. Electrolyzed water generator. [Invention 2] The electrolyzed water generator according to Invention 1, including a first tank for storing the first electrolyzed water generated by the electrolysis unit. [Invention 3] further including a circulation water passage for circulating the first electrolyzed water between the first tank and the electrolysis unit, wherein the electrolysis unit has, as an operation mode, a re-electrolysis mode in which the dissolved hydrogen concentration of the first electrolyzed water in the first tank is maintained or increased by re-electrolyzing the first electrolyzed water while circulating it through the circulation water passage. The electrolyzed water generator according to Invention 2. [Invention 4] The electrolyzed water generator according to Invention 3, wherein the re-electrolysis mode increases the dissolved hydrogen concentration of the first electrolyzed water to a saturated hydrogen concentration. [Invention 5] The electrolyzed water generator according to any one of Inventions 2 to 4, including a second tank for storing the second electrolyzed water or the water having a dissolved hydrogen concentration lower than that of the second electrolyzed water. [Invention 6] The electrolyzed water generator according to Invention 5, wherein the second tank is for storing non-electrolyzed water that has not been electrolyzed. [Invention 7] The electrolyzed water generator according to Invention 6, including a filtration section provided upstream of the electrolysis unit. [Invention 8] The electrolyzed water generator according to Invention 6, including a filtration section provided downstream of the electrolysis unit. [Invention 9] including a first branch flow path provided upstream of the electrolysis unit, The electrolyzed water generation device according to invention 8, wherein the first branch flow path includes a first flow path for supplying the raw water to the electrolysis unit and a second flow path for supplying the raw water to the filtration unit. [Invention 10] including a second branch flow path provided on the downstream side of the filtration unit, The electrolyzed water generation device according to invention 8 or 9, wherein the second branch flow path includes a third flow path for supplying the first electrolyzed water filtered by the filtration unit to the first tank and a fourth flow path for supplying the second electrolyzed water or the water filtered by the filtration unit to the second tank. [Invention 11] The electrolyzed water generation device according to any one of inventions 5 to 10, wherein the mixing unit is a valve capable of adjusting the mixing ratio of the first electrolyzed water in the first tank and the second electrolyzed water or the water in the second tank. [Invention 12] The electrolyzed water generation device according to any one of inventions 1 to 11, wherein a sensor for measuring the dissolved hydrogen concentration of the mixed water mixed by the mixing unit is provided in the flow path on the downstream side of the mixing unit. [Invention 13] including a control unit for controlling the mixing ratio of the mixing unit, The electrolyzed water generation device according to invention 12, wherein the control unit controls the mixing ratio based on the output from the sensor. [Invention 14] The electrolyzed water generation device according to invention 13, wherein the control unit controls the electrolysis unit based on the output from the sensor. [Invention 15] An electrolyzed water generation method, a first step of generating first electrolyzed water in which hydrogen is dissolved by electrolyzing the supplied raw water; and a second step of mixing the first electrolyzed water generated in the first step and second electrolyzed water or water having a lower dissolved hydrogen concentration than the first electrolyzed water at an arbitrary ratio. An electrolyzed water generation method. [Invention 16] Storing the first electrolyzed water generated in the first step in a first tank; The electrolyzed water generation method according to the sixteenth aspect of the present invention, including storing the second electrolyzed water or the water having a dissolved hydrogen concentration lower than that of the first electrolyzed water generated in the first step in a second tank.

Explanation of Signs

[0063] 1: Electrolyzed water generation device 1A: Electrolyzed water generation device 1B: Electrolyzed water generation device 1C: Electrolyzed water generation device 3: Electrolysis unit 5: First tank 6: Second tank 7: Mixing section 8: Sensor 9: Filtration section 9a: Reverse osmosis membrane 10: Control section 51: Circulation water channel 91: First branch flow path 91a: First flow path 91b: Second flow path 94: Second branch flow path 94c: Third flow path 94d: Fourth flow path 500: Electrolyzed water generation method 500B: Electrolyzed water generation method S10: First step S11: Step S12: Step S20: Second step

Claims

1. An electrolyzed water generating apparatus, an electrolysis unit for generating first electrolyzed water in which hydrogen is dissolved by electrolyzing supplied raw water; a mixing unit for mixing the first electrolyzed water generated by the electrolysis unit and second electrolyzed water or water having a dissolved hydrogen concentration lower than that of the first electrolyzed water at an arbitrary mixing ratio; a first tank for storing the first electrolyzed water generated by the electrolysis unit; and a second tank for storing the second electrolyzed water or the water. An electrolyzed water generating apparatus.

2. The electrolyzed water generating apparatus according to claim 1, further comprising a circulation water channel for circulating the first electrolyzed water between the first tank and the electrolysis unit, wherein the electrolysis unit includes, as an operation mode, a re-electrolysis mode in which the dissolved hydrogen concentration of the first electrolyzed water in the first tank is maintained or increased by re-electrolyzing the first electrolyzed water while circulating it through the circulation water channel.

3. The electrolyzed water generating apparatus according to claim 2, wherein the re-electrolysis mode increases the dissolved hydrogen concentration of the first electrolyzed water to a saturated hydrogen concentration.

4. The electrolyzed water generating apparatus according to any one of claims 1 to 3, wherein the second tank is for storing non-electrolyzed water that has not been electrolyzed.

5. The electrolyzed water generating apparatus according to any one of claims 1 to 3, including a filtration unit provided upstream of the electrolysis unit.

6. The electrolyzed water generating apparatus according to any one of claims 1 to 3, including a filtration unit provided downstream of the electrolysis unit.

7. The electrolyzed water generating apparatus according to claim 6, including a second branch flow path provided downstream of the filtration unit, wherein the second branch flow path includes a third flow path for supplying the first electrolyzed water filtered by the filtration unit to the first tank and a fourth flow path for supplying the second electrolyzed water or the water filtered by the filtration unit to the second tank.

8. The electrolyzed water generating apparatus according to any one of claims 1 to 3, wherein the mixing unit is a valve capable of adjusting the mixing ratio of the first electrolyzed water in the first tank and the second electrolyzed water or the water in the second tank.

9. An electrolyzed water generating apparatus, an electrolysis unit for generating first electrolyzed water in which hydrogen is dissolved by electrolyzing supplied raw water; A mixing unit for mixing the first electrolyzed water generated by the electrolysis unit and the second electrolyzed water or water having a dissolved hydrogen concentration lower than that of the first electrolyzed water at an arbitrary mixing ratio, A control unit for controlling the mixing ratio of the mixing unit, A sensor for measuring the dissolved hydrogen concentration of the mixed water mixed in the mixing unit is provided in the flow path on the downstream side of the mixing unit, The control unit controls the mixing ratio based on the output from the sensor, An electrolyzed water generator.

10. The electrolyzed water generator according to claim 9, wherein the control unit controls the electrolysis unit based on the output from the sensor.

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