Water treatment equipment

Abstract

To provide a water treatment apparatus capable of suppressing a damage to an electrolytic tank and a decrease in dissolved hydrogen concentration in reverse osmosis dissolved hydrogen water.SOLUTION: A water treatment apparatus 10 includes an electrolytic apparatus 30 that produces dissolved hydrogen water 3 and an electrolytic water tank 38. A part of a tank housing 38a of the electrolytic water tank 38 is in contact with an electrolytic tank housing 34a. The water treatment apparatus 10 has a reverse osmosis membrane treatment apparatus 40 connected to the electrolytic apparatus 30 and a control apparatus 200. The electrolytic apparatus 30 has a plurality of electrolytic tanks 33. The electrolytic water tank 38 can supply dissolved hydrogen water 3 to the reverse osmosis membrane treatment apparatus 40. A circulation flow path 50 is connected to the electrolytic water tank 38, and an external apparatus 150 and a circulation flow path connection electrolytic tank 33D are piped to the circulation flow path 50. The control apparatus 200 controls the dissolved hydrogen water 3 flowing out of the electrolytic water tank 38 to be returned to the electrolytic water tank 38 via the circulation flow path connecting electrolytic tank 33D after being supplied to the external apparatus 150.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a water treatment device. [Background technology]

[0002] In recent years, it has been known that oxidative stress occurs in dialysis patients during hemodialysis. This is thought to be caused by active oxygen generated during dialysis, and it has been proposed to reduce oxidative stress by eliminating this active oxygen.

[0003] Based on this knowledge, a dialysis water production device has been proposed that produces dialysis water (dissolved hydrogen water) with a high concentration of dissolved hydrogen by dissolving hydrogen in water (hereinafter referred to as "reverse osmosis water") that has been treated and purified with a reverse osmosis membrane (RO membrane) (for example, Patent Document 1). The dialysis water prepared in this way is supplied to an external device called a dialyzer, etc., and a drug is dissolved in the device, thereby preparing a dialysis solution with dissolved hydrogen. When such a dialysis solution with dissolved hydrogen is used for hemodialysis, hydrogen reacts with hydroxyl radicals in the body, suppressing oxidative stress and inflammatory reactions. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-139475 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, a part of the dialysis water supplied to an external device such as a dialyzer is used for hemodialysis of the patient, and the remainder is circulated again and returned to the raw water tank or reverse osmosis water tank of the dialysis water production device. Here, the dissolved hydrogen contained in the dialysis fluid is degassed over time while circulating through the dialysis water production device or the hemodialysis device, so the dissolved hydrogen concentration decreases. Therefore, if the circulated dialysis water is directly returned to the reverse osmosis water tank, there is a concern that the dissolved hydrogen concentration in the reverse osmosis water tank will also decrease. In this way, if the dissolved hydrogen concentration in the reverse osmosis water tank or the like decreases, there is a concern that the dissolved hydrogen concentration in the dialysis fluid supplied to the hemodialysis device will decrease or become unstable.

[0006] The above-mentioned dialysis water production device generates dissolved hydrogen water in which hydrogen is dissolved by performing electrolysis on raw water treated with activated carbon. The above-mentioned electrolysis is performed by an electrolytic cell having a cathode chamber and an anode chamber. Here, the housing (case) of the electrolytic cell is generally made of resin, and when water flows into the housing, water pressure is applied from the inside of the housing, and when the water pressure increases excessively, the housing is deformed so as to bulge outward. If such deformation is large, there is a concern that the housing of the electrolytic cell may be damaged. In addition, even if the deformation is small, repeated occurrence of the deformation may cause stress to accumulate in the housing, resulting in cracks or damage. Thus, in conventional dialysis water production devices, there is a demand for stabilization of the dissolved hydrogen concentration and suppression of damage to the housing of the electrolytic cell that generates dissolved hydrogen water.

[0007] Therefore, the present invention aims to realize a water treatment device that can effectively prevent damage to the electrolytic cell housing and that can minimize the decrease in the dissolved hydrogen concentration in reverse osmosis dissolved hydrogen water caused by degassing of hydrogen. [Means for solving the problem]

[0008] (1) The water treatment device of the present invention, provided to solve the above-mentioned problems, comprises an electrolysis device having electrodes and an electrolytic cell, which produces dissolved hydrogen water by electrolyzing raw water, and an electrolytic water tank for storing the dissolved hydrogen water, wherein at least a portion of a tank casing constituting the electrolytic water tank is in contact with an electrolytic cell casing constituting the electrolytic cell.

[0009] (2) The water treatment device of the present invention described above may be characterized in that the tank casing has a clamping portion capable of clamping the electrolytic cell casing from at least two directions, and the electrolytic cell casing is clamped by the clamping portion.

[0010] (3) The water treatment device of the present invention described above may be characterized in that the electrolysis device includes a plurality of the electrolytic cells, and at least two of the electrolytic cell casings are in contact with each other at least partially.

[0011] (4) The water treatment device of the present invention described above may be characterized in that the clamping portion is formed as a recess, and at least a part of the electrolytic cell casing is engageable with the recess.

[0012] (5) The water treatment device of the present invention described above may include a reverse osmosis membrane treatment device connected to the electrolysis device and performing reverse osmosis membrane treatment on the dissolved hydrogen water, and a control device for controlling the electrolysis device, wherein the electrolysis device has at least one of the electrolytic cells, the electrolytic water tank is connected to the reverse osmosis membrane treatment device and is capable of supplying the dissolved hydrogen water to the reverse osmosis membrane treatment device, the electrolytic water tank is connected to a circulation flow path for discharging the dissolved hydrogen water and circulating it back to the electrolytic water tank, and the circulation flow path is connected by piping to an external device connected via the reverse osmosis membrane treatment device and at least one of the electrolytic cells, a circulation flow path connected electrolytic cell, and the control device controls the dissolved hydrogen water discharged from the electrolytic water tank to be supplied to the external device via the reverse osmosis membrane treatment device, and then returned to the electrolytic water tank via the circulation flow path connected electrolytic cell.

[0013] (6) The water treatment device of the present invention described above may be characterized in that a plurality of electrolytic cells are provided, and the control device controls the second current value passed to the electrodes in the electrolytic cell connected to the circulation flow path and the first current value passed to the electrodes in an electrolytic cell not connected to the circulation flow path, which is one of the electrolytic cells and is not connected to the circulation flow path, to be different values.

[0014] (7) In the water treatment device of the present invention described above, the control device may be characterized in that it controls the flow of electricity to the electrodes in either one or both of the electrolytic cell connected to the circulation flow path and the electrolytic cell not connected to the circulation flow path so that the second hydrogen concentration of the dissolved hydrogen water flowing out from the electrolytic cell connected to the circulation flow path approaches the first hydrogen concentration of the dissolved hydrogen water stored in the electrolytic water tank.

[0015] (8) The water treatment device of the present invention, which is provided to solve the above-mentioned problems, comprises an electrolysis device having electrodes and at least one electrolytic cell and producing dissolved hydrogen water by electrolyzing raw water, a reverse osmosis membrane treatment device connected to the electrolysis device and performing reverse osmosis membrane treatment on the dissolved hydrogen water, an electrolytic water tank for storing the dissolved hydrogen water and supplying the dissolved hydrogen water to the reverse osmosis membrane treatment device, a circulation flow path connected to the electrolytic water tank and circulating the dissolved hydrogen water to return to the electrolytic water tank, and a control device for controlling the electrolysis device, wherein the circulation flow path is connected by piping to an external device connected via the reverse osmosis membrane treatment device and a circulation flow path connected electrolytic cell which is at least one of the electrolytic cells, and the control device controls the dissolved hydrogen water flowing out from the electrolytic water tank to be supplied to the external device via the reverse osmosis membrane treatment device and then returned to the electrolytic water tank via the circulation flow path connected electrolytic cell.

[0016] (9) The water treatment device of the present invention described above may be characterized in that a plurality of electrolytic cells are provided, and the control device controls the second current value passed to the electrodes in the circulation flow path-connected electrolytic cell and the first current value passed to the electrodes in the circulation flow path-unconnected electrolytic cell among the electrolytic cells that is not connected to the circulation flow path so as to be different values.

[0017] (10) In the water treatment device of the present invention described above, the control device may be characterized in that it controls the flow of electricity to the electrodes in either one or both of the electrolytic cell connected to the circulation flow path and the electrolytic cell not connected to the circulation flow path so that the second hydrogen concentration of the dissolved hydrogen water flowing out from the electrolytic cell connected to the circulation flow path approaches the first hydrogen concentration of the dissolved hydrogen water stored in the electrolytic water tank.

[0018] (11) The water treatment device of the present invention described above may be characterized in that at least a portion of a tank housing constituting the electrolytic water tank is in contact with an electrolytic cell housing constituting the electrolytic cell.

[0019] (12) The water treatment device of the present invention described above may be characterized in that the tank casing has a clamping portion capable of clamping the electrolytic cell casing from at least two directions, and the electrolytic cell casing is clamped by the clamping portion.

[0020] (13) The water treatment device of the present invention described above may be characterized in that the clamping portion is formed as a recess, and at least a part of the electrolytic cell casing is engageable with the recess. Effect of the Invention

[0021] According to the present invention, it is possible to realize a water treatment device that can effectively prevent damage to the housing of the electrolytic cell, and also to realize a water treatment device that can minimize the decrease in the dissolved hydrogen concentration in the reverse osmosis dissolved hydrogen water that is caused by degassing of hydrogen. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is an explanatory diagram of a hemodialysis system formed by piping a dialyzer and a dialysis fluid supplying device as external devices to a water treatment device according to one embodiment of the present invention. [Diagram 2] 1 is an explanatory diagram showing a configuration of a water treatment device according to an embodiment of the present invention; [Diagram 3] 3 is a cross-sectional view showing a schematic diagram of a hydrogen dissolving device constituting the water treatment device of FIG. 2. [Figure 4] 1 is a perspective view showing a schematic state before assembly of an electrolytic cell and an electrolytic water tank constituting a water treatment device according to one embodiment of the present invention; [Diagram 5] 5 is a right-side cross-sectional view showing a schematic assembly of the electrolytic cell and the electrolytic water tank shown in FIG. 4. [Figure 6] FIG. 11 is a schematic perspective view of an electrolytic cell constituting a water treatment device according to a modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, a water treatment device 10 according to one embodiment of the present invention and a hemodialysis system 300 configured using the same will be described in detail with reference to the drawings.

[0024] As shown in Fig. 1, the water treatment device 10 performs an operation (water treatment operation) of generating dissolved hydrogen water 3 (see Fig. 2) by dissolving hydrogen in raw water 2 supplied from the outside, and then performing reverse osmosis membrane processing on the dissolved hydrogen water 3 to generate reverse osmosis dissolved hydrogen water 5. The hemodialysis system 300 is for performing hemodialysis using dialysis water generated using the reverse osmosis dissolved hydrogen water 5. The hemodialysis system 300 includes a dialysis fluid supply device 160 and a dialyzer 170, which will be described in detail later, as an external device 150 that operates using the reverse osmosis dissolved hydrogen water 5. The configurations of the water treatment device 10 and the hemodialysis system 300 will be described in more detail below.

[0025] As shown in FIG. 2, the water treatment device 10 includes a raw water supply unit 20, an electrolysis device 30 (also referred to as a hydrogen dissolving device 30), and a reverse osmosis membrane treatment device 40, which are connected to each other by piping to form a water treatment system 100. The water treatment device 10 also includes a circulation flow path 50 for circulating the reverse osmosis dissolved hydrogen water 5 generated in the water treatment system 100. The water treatment device 10 also includes a control device 200 for controlling the operation of each part. The water treatment device 10 can generate dissolved hydrogen water 3 by compressing water in the water treatment system 100 and electrolyzing (also simply referred to as electrolysis) the compressed water by the hydrogen dissolving device 30. The water treatment device 10 generates reverse osmosis dissolved hydrogen water 5 by treating the generated dissolved hydrogen water 3 in the reverse osmosis membrane treatment device 40, and can supply the reverse osmosis dissolved hydrogen water 5 to an external device 150 while circulating it in the circulation flow path 50. The configuration of each part constituting the water treatment device 10 will be described in more detail below.

[0026] The raw water supply unit 20 treats water (raw water 2), such as tap water, well water, or groundwater, supplied from outside the water treatment device 10, and then supplies the treated water to the hydrogen dissolution device 30. The raw water supply unit 20 includes a prefilter 22, a water softener 24, an activated carbon treatment device 26, and a pump 28.

[0027] The prefilter 22 is for removing impurities from water (raw water 2), such as tap water, well water, or groundwater, supplied from outside the water treatment device 10. The prefilter 22 can be configured with an appropriate filter, and is intended to remove impurities such as iron rust and sand particles from hardness components (dissolved solids such as calcium ions and magnesium ions) contained in the raw water 2, for example.

[0028] The water softener 24 is for removing hardness components contained in the raw water 2 through a substitution reaction by ion exchange, thereby performing a process to produce soft water. In the water treatment system 100, the water softener 24 is connected by piping downstream of the prefilter 22. Therefore, the water softener 24 can further remove hardness components from the raw water 2 from which impurities have been removed by the prefilter 22, thereby softening the raw water 2.

[0029] The activated carbon treatment device 26 is connected by piping downstream of the water softener 24 in the water treatment system 100. The raw water 2 that has been softened by the water softener 24 is supplied to the activated carbon treatment device 26. The activated carbon treatment device 26 uses activated carbon, which is a porous adsorbent material, to perform treatment to remove residual chlorine, chloramine, organic matter, and the like contained in the raw water 2 by physical adsorption.

[0030] The raw water supply unit 20 operates a pump 28 disposed upstream of the prefilter 22 in the water treatment system 100 to pump the raw water 2 and pass it through the prefilter 22, the water softener 24, and the activated carbon treatment device 26. As a result, the raw water 2 has impurities removed by the prefilter 22, is softened by the water softener 24, and is further provided with substances such as residual chlorine removed by the activated carbon treatment device 26, and is then supplied to the hydrogen dissolution device 30 (electrolysis device 30).

[0031] The hydrogen dissolving device 30 is connected to the water treatment system 100 by piping downstream of the raw water supply unit 20. As will be described in detail later, the hydrogen dissolving device 30 includes four electrolytic cells 33 (33A, 33B, 33C, 33D) as shown in Figs. 4 and 5. The hydrogen dissolving device 30 generates hydrogen dissolved in the raw water 2 introduced from the raw water supply unit 20 (dissolved hydrogen water 3). The hydrogen dissolving device 30 may be any device that can dissolve hydrogen in the raw water 2 to generate the dissolved hydrogen water 3. In this embodiment, the hydrogen dissolving device 30 is one that can generate the dissolved hydrogen water 3 having hydrogen dissolved therein by performing an electrolysis process.

[0032] More specifically, as shown in Fig. 3, the hydrogen dissolving apparatus 30 may include a solid polymer membrane 32 and an electrolytic cell 33. Note that Fig. 3 is a schematic diagram of the principle of the hydrogen dissolving apparatus 30, and the shape and size of the electrolytic cell 33 may differ from the actual one. The electrolytic cell 33 is configured with an electrolytic cell housing 34a, which is provided with an inlet channel 34b, a water supply channel 34c, and a drainage channel 34d. The hydrogen dissolving apparatus 30 includes a solid polymer membrane 32, an anode 35A and a cathode 35B as electrodes 35, a dielectric layer 37, and the like, inside the electrolytic cell housing 34a.

[0033] The inlet path 34b is for introducing the raw water 2 supplied from the raw water supply unit 20, or the reverse osmosis dissolved hydrogen water 5 (also referred to as recovered dissolved hydrogen water 5A) recovered without being used in the treatment of the external device 150, into the inside of the electrolytic cell housing 34a. The water supply path 34c is a flow path for sending the dissolved hydrogen water 3 generated by the hydrogen dissolving device 30 to the electrolytic water tank 38. The drainage path 34d is a flow path for discharging wastewater (dissolved oxygen water 4) generated by the treatment in the hydrogen dissolving device 30 to the outside.

[0034] As shown in FIG. 4 and FIG. 5, the electrolytic cells 33A, 33B, and 33C (also referred to as the electrolytic cells 33A, 33B, and 33C not connected to the circulation flow path) have the piping 29 connected to the raw water supply unit 20 at their respective inlet passages 34b. That is, the raw water 2 is introduced (supplied) to the electrolytic cells 33A, 33B, and 33C through the inlet passage 34B. On the other hand, the electrolytic cell 33D (also referred to as the electrolytic cell 33D connected to the circulation flow path) is connected to the circulation flow path 50. As will be described in detail later, the circulation flow path 50 is a flow path for returning the dissolved hydrogen water 3 (corresponding to the recovered dissolved hydrogen water 5A) circulated through the electrolytic water tank 38, the reverse osmosis membrane treatment device 40, and the external device 150 back to the electrolytic water tank 38. The electrolytic cells 33A, 33B, and 33C and the electrolytic cell 33D have the same configuration except for the flow paths connected to them.

[0035] The electrolytic water tank 38 is provided upstream of the reverse osmosis membrane treatment device 40 (see FIG. 2) and can store (store) the dissolved hydrogen water 3 generated by the hydrogen dissolving device 30. In this embodiment, the electrolytic water tank 38 has a tank housing 38a configured in a cylindrical shape, and a clamping portion 39 is formed by cutting out a part of the circumferential surface. In addition, an outlet 38b (see FIG. 5) for discharging the dissolved hydrogen water 3 is formed at the bottom of the electrolytic water tank 38.

[0036] The clamping portion 39 is formed as a recess 39 by cutting out the tank housing 38a in a concave shape. Connection ports 38c leading to the inside of the electrolytic water tank 38 are formed at an interval in the vertical direction on the innermost surface 39a (bottom surface 39a) of the inner surface of the recess 39. The connection ports 38c are formed as, for example, circular holes, and the water supply channel 34c in the electrolytic cell 33 can be inserted and connected. In other words, the connection ports 38c function as an adapter for the water supply channel 34c.

[0037] As shown in FIG. 3, the electrolytic cell housing 34a is a tank-shaped housing capable of storing the raw water 2 to be electrolyzed or the recovered dissolved hydrogen water 5A. In this embodiment, as shown in FIG. 4 and FIG. 5, the electrolytic cell housing 34a in each electrolytic cell 33 is formed in a box shape and is stacked in the vertical direction. As described above, the electrolytic cell housing 34a is provided with the inlet passage 34b, the water supply passage 34c, and the drain passage 34d, and the inlet passage 34b, the water supply passage 34c, and the drain passage 34d are arranged so as to protrude from the electrolytic cell housing 34a. The multiple electrolytic cell housings 34a are integrally connected to each other in the vertical direction and can be fitted into and engaged with the recess 39 (clamping portion 39). In other words, at least a part of the tank housing 38a is in contact with the electrolytic cell housing 34a constituting the electrolytic cell 33. In other words, the clamping portion 39 can clamp the electrolytic cell housing 34a from at least two directions and can clamp and hold the electrolytic cell housing 34a. This makes it possible to prevent the electrolytic cells 33 from expanding in the width direction in the water treatment device 10. Furthermore, as the electrolytic cell housing 34a engages with the recess 39, the water supply channels 34c in the multiple electrolytic cells 33 are connected to the connection ports 38c, and the drain channels 34d communicate with the electrolytic water tank 38.

[0038] As shown in FIG. 3, the solid polymer membrane 32 functions as an electrolyte in the hydrogen dissolving device 30. The solid polymer membrane 32 is disposed in the approximate center of the electrolytic cell 33 in the lateral direction so as to extend in the longitudinal direction of the electrolytic cell 33. As a result, the internal space of the electrolytic cell 33 is separated into a space on one side and a space on the other side via the solid polymer membrane 32. The solid polymer membrane 32 absorbs oxonium ions (H 3 O + ) to the cathode 35B side. For example, a material formed of a fluorine-based resin material having a sulfonic acid group can be suitably used as the solid polymer membrane 32. More specifically, Nafion (manufactured by DuPont), Flemion (manufactured by Asahi Glass Co., Ltd.), Aciplex (manufactured by Asahi Glass Co., Ltd.), etc. can be suitably used as the solid polymer membrane 32.

[0039] The anode 35A and the cathode 35B function as power suppliers that supply power to the electrolytic cell 33. The anode 35A and the cathode 35B are arranged to face each other with the solid polymer membrane 32 interposed therebetween. The anode 35A and the cathode 35B are formed using a material such as titanium or platinum. The anode 35A and the cathode 35B are electrically connected to each other.

[0040] The dielectric layer 37 is disposed in a space formed between the solid polymer membrane 32 and the anode 35A, and in a space formed between the solid polymer membrane 32 and the cathode 35B. The dielectric layer 37 is formed using a material such as titanium or platinum.

[0041] When the raw water 2 is electrolyzed in the hydrogen dissolving device 30, the following reactions occur on the anode 35A side and the cathode 35B side. Anode side: 6H 2 O→4H 3 O + +O 2 +4e - Cathode side: 4H 3 O + +4e - →2H 2 +4H 2 O

[0042] In the hydrogen dissolving device 30, oxonium ions (H 3 O + ) is used, and OH is used during the electrolysis process. - No ions are generated. Therefore, even when the hydrogen dissolving apparatus 30 performs electrolysis at a high current value to increase the amount of dissolved hydrogen, the pH of the treated water does not change. Therefore, the hydrogen dissolving apparatus 30 does not have the inconvenience of suppressing the dissolved hydrogen concentration of the treated water due to the upper limit of pH, and it is possible to perform electrolysis at a desired high current value and improve the dissolved hydrogen concentration of the treated water. As a result, it is possible to obtain treated water having the required dissolved hydrogen concentration.

[0043] As shown in Figures 4 and 5, the hydrogen dissolving device 30 can send the dissolved hydrogen water 3 generated by the above-mentioned electrolysis process from a water supply channel 34c formed on the cathode 35B side of the electrolysis cell housing 34a to the inside of an electrolytic water tank 38. The dissolved hydrogen water 3 stored in the electrolytic water tank 38 flows out of the electrolytic water tank 38 and is sent to a reverse osmosis membrane treatment device 40 (see Figure 2). Meanwhile, the dissolved oxygen water 4 generated on the anode 35A side by the electrolysis process is discharged from a drainage channel 34d formed on the anode 35A side (see Figure 3). A drain pipe 55 leading to the outside is connected to the drainage channel 34d, and the dissolved oxygen water 4 discharged from the drainage channel 34d is discharged to the outside through the drainage pipe 55.

[0044] 2, the reverse osmosis membrane treatment device 40 is disposed downstream of the hydrogen dissolution device 30 in the water treatment system 100. The reverse osmosis membrane treatment device 40 is a device for performing reverse osmosis membrane treatment using a reverse osmosis membrane 42. The reverse osmosis membrane treatment device 40 includes the reverse osmosis membrane 42, an RO tank 44, and an RO pump 45.

[0045] The reverse osmosis membrane 42 is for performing reverse osmosis treatment on the dissolved hydrogen water 3 produced by the hydrogen dissolving device 30. When there are solutions with different concentrations with the semipermeable membrane as a boundary, a phenomenon (osmosis) occurs in which water moves from the low-concentration solution to the high-concentration solution. In response to this, by applying pressure to the high-concentration solution with the semipermeable membrane as a boundary, water can be moved from the high-concentration solution to the low-concentration solution, and a phenomenon (reverse osmosis) in which water permeates into the low-concentration solution can be generated. The reverse osmosis membrane 42 is provided for performing a process (reverse osmosis membrane process) to obtain water that has been reverse osmosis (reverse osmosis water) in the reverse osmosis membrane processing device 40.

[0046] The reverse osmosis membrane treatment device 40 can remove impurities such as trace metals by reverse osmosis of water. The reverse osmosis membrane treatment device 40 can further remove impurities such as trace metals from the dissolved hydrogen water 3 by reverse osmosis of the dissolved hydrogen water 3 pumped from the hydrogen dissolution device 30 side by the RO pump 45 through the reverse osmosis membrane 42. In the water treatment device 10 of this embodiment, as described above, at the stage before the dissolved hydrogen water 3 is generated in the hydrogen dissolution device 30, impurities have already been removed in the prefilter 22, the water has been softened in the water softener 24, and substances such as residual chlorine have been removed in the activated carbon treatment device 26. Therefore, the water treatment device 10 can obtain water (reverse osmosis water) that meets the water quality standard specified in ISO13959 (water standard for dialysis) by reverse osmosis treatment of the dissolved hydrogen water 3 by the reverse osmosis membrane treatment device 40. In addition, the water treatment device 10 reverse osmosis treatment of the dissolved hydrogen water 3 generated in the hydrogen dissolution device 30 by the reverse osmosis membrane treatment device 40. Therefore, the water treatment device 10 can obtain reverse osmosis water having hydrogen dissolved therein (reverse osmosis dissolved hydrogen water 5) by performing reverse osmosis treatment in the reverse osmosis membrane treatment device 40.

[0047] The RO tank 44 is provided downstream of the reverse osmosis membrane 42 in the water treatment system 100. The RO tank 44 is for storing (storing) reverse osmosis water (reverse osmosis dissolved hydrogen water 5) that has been subjected to reverse osmosis membrane treatment by the reverse osmosis membrane 42. An ultraviolet sterilization device 47 is installed in the RO tank 44. In addition, a delivery tank piping 46 that forms part of the circulation flow path 50 is connected to the RO tank 44. The delivery tank piping 46 is connected to the piping that forms the circulation flow path 50.

[0048] The delivery tank piping 46 is a piping for drawing out the reverse osmosis dissolved hydrogen water 5 from the RO tank 44. The delivery tank piping 46 is connected to the bottom side of the RO tank 44 (the bottom part of the RO tank 44 in this embodiment). The delivery tank piping 46 is provided with a circulation pump 46a, an ultrafiltration device 46b, and a piping connection part 46c.

[0049] The circulation pump 46a pumps out the reverse osmosis dissolved hydrogen water 5 stored in the RO tank 44 and pumps it toward the circulation flow path 50. The ultrafiltration device 46b is equipped with an ultrafiltration membrane. The ultrafiltration device 46b is provided so as to capture microorganisms, etc., that may be present in the reverse osmosis dissolved hydrogen water 5 produced by the reverse osmosis membrane process. The piping connection section 46c is a section to which the ends of the piping that constitutes the circulation flow path 50 are connected.

[0050] The circulation flow path 50 is a flow path for forming a circulation flow of the reverse osmosis dissolved hydrogen water 5 that leaves the RO tank 44 and returns to the electrolytic cell 33D by being connected to the delivery tank piping 46 connected to the above-mentioned RO tank 44. An external device 150 (see FIG. 1) that operates using the reverse osmosis dissolved hydrogen water 5 is connected to the circulation flow path 50 by piping. The external device 150 may be any device that operates using the reverse osmosis dissolved hydrogen water 5 generated by the water treatment device 10. In this embodiment, a dialysate supplying device 160 for generating a dialysate constituting the hemodialysis system 300 and a dialyzer 170 are connected to the circulation flow path 50 as the external device 150 by piping.

[0051] In addition, the communication tank pipe 48, which is a part of the circulation flow path 50, is connected to the middle part of the circulation flow path 50 via a pipe connection part 48b. The communication tank pipe 48 is provided with an ultrafiltration device 48a. The ultrafiltration device 48a is similar to the ultrafiltration device 46b described above, and is provided so that microorganisms and the like can be captured if they are contained in the reverse osmosis dissolved hydrogen water 5 that has returned toward the electrolytic water tank 38. In addition, a pipe forming the circulation flow path 50 is connected to the downstream side of the ultrafiltration device 46b. The pipe forming the circulation flow path 50 is connected to the upper side of the electrolytic water tank 38, and the reverse osmosis dissolved hydrogen water 5 flowing through the circulation flow path 50 can be led to the electrolytic water tank 38. That is, the circulation flow path 50 is used to re-electrolyze the reverse osmosis dissolved hydrogen water 5 (also referred to as recovered dissolved hydrogen water 5A) that has not been used for the treatment of the external device 150 and has been recovered.

[0052] As shown in Fig. 1, the dialysis fluid supplying device 160 is capable of generating a medicinal solution (dialysis fluid) used in dialysis by dissolving a medicinal agent in reverse osmosis dissolved hydrogen water 5. One or more supplying devices (two drug dissolving devices 162, 164 in the illustrated example) for supplying a medicinal agent are connected to the dialysis fluid supplying device 160. The dialysis fluid supplying device 160 can generate the dialysis fluid by mixing the drug supplied from the drug dissolving devices 162, 164 with the reverse osmosis dissolved hydrogen water 5 taken in from the circulation flow path 50. The dialysis fluid generated by the dialysis fluid supplying device 160 is supplied to a dialyzer 180 assigned to each patient and used for hemodialysis.

[0053] Moreover, the dialyzer 170 differs from the dialyzer 180 described above in that it has a function of generating a dialysis fluid by dissolving a drug in the reverse osmosis dissolved hydrogen water 5. Therefore, the dialyzer 170 is connected to the circulation flow path 50 without passing through the dialysis fluid supply device 160.

[0054] 2, the control device 200 controls the water treatment operation in which the raw water 2 is treated with dissolved hydrogen water 3 in the water treatment device 10 to produce reverse osmosis dissolved hydrogen water 5. The control device 200 is composed of a computer or the like and can perform various calculations and processing. The control device 200 can also perform control to supply the reverse osmosis dissolved hydrogen water 5 to the external device 150 according to the operating status of the external device 150.

[0055] The control device 200 can perform control so that the dissolved hydrogen water 3 flowing out from the electrolytic water tank 38 is supplied to the external device 150 via the reverse osmosis membrane treatment device 40, and then returned to the electrolytic water tank 38 via the circulation flow path connected electrolytic cell 33D. The control device 200 can also perform control so that the second current value passing through the electrode 35 in the circulation flow path connected electrolytic cell 33D and the first current value passing through the electrode 35 in the circulation flow path unconnected electrolytic cells 33A, 33B, and 33C that are not connected to the circulation flow path 50 among the electrolytic cells 33 are different from each other. Specifically, the control device 200 can perform control so that the hydrogen concentration (also referred to as the second hydrogen concentration) of the dissolved hydrogen water 3 flowing out from the circulation flow path connected electrolytic cell 33D approaches the hydrogen concentration (also referred to as the first hydrogen concentration) of the dissolved hydrogen water 3 stored in the electrolytic water tank 38.

[0056] The above is the configuration of the water treatment device 10 according to one embodiment of the present invention, and next, the effects of the water treatment device 10 of the present invention will be described below. The water treatment device 10 embodying the present invention as exemplified in the above-mentioned embodiment has the characteristic configurations shown in (A) to (L) below, which enable the water treatment device 10 to achieve effects unique to the present invention.

[0057] (A) The water treatment device 10 of the present embodiment described above is characterized in that it comprises an electrolysis device 30 (hydrogen dissolution device 30) having electrodes 35 and an electrolytic cell 33, and which generates dissolved hydrogen water 3 by electrolyzing raw water 2, and an electrolytic water tank 38 for storing the dissolved hydrogen water 3, and at least a portion of the tank casing 38a constituting the electrolytic water tank 38 is in contact with the electrolytic cell casing 34a constituting the electrolytic cell 33.

[0058] In the water treatment device 10 of the present embodiment, the electrolytic cell housing 34a constituting the electrolytic cell 33 is supported by at least a part of the tank housing 38a constituting the electrolytic water tank 38 by the configuration as described above (A). Therefore, the water treatment device 10 of the present embodiment can prevent the electrolytic cell 33 from expanding or cracking due to the pressure of the raw water 2 or the electrolytic water (dissolved hydrogen water 3, etc.). In addition, the water treatment device 10 of the present embodiment can protect the electrolytic cell 33 without providing a separate reinforcing member or the like for reinforcing the electrolytic cell 33, so that the water treatment device 10 can be prevented from becoming large and increasing in cost. Here, the portion where the tank housing 38a contacts the electrolytic cell housing 34a is not particularly limited, but it is preferable that the electrolytic cell housing 34a contacts a side portion of the electrolytic cell housing 34a that is considered to be prone to expansion. In addition, the contact between the electrolytic cell housing 34a and the tank housing 38a is preferably a line contact or a surface contact. As a result, the water treatment device 10 of the present embodiment can reliably support the electrolytic cell housing 34a.

[0059] (B) The water treatment device 10 of the present embodiment described above is characterized in that the tank casing 38a has a clamping portion 39 capable of clamping the electrolytic cell casing 34a from at least two directions, and the electrolytic cell casing 34a is clamped by the clamping portion 39.

[0060] By being configured as described above in (B), the water treatment device 10 of this embodiment can more reliably prevent the electrolytic cell housing 34a from expanding due to the pressure of the electrolytic water, etc. This makes it possible for the water treatment device 10 of this embodiment to reliably prevent the electrolytic cell 33 from being damaged or cracked. Furthermore, the water treatment device 10 of this embodiment can protect the electrolytic cell 33 without providing a separate reinforcing member or the like for reinforcing the electrolytic cell 33, thereby making it possible to prevent the water treatment device 10 from becoming larger and more expensive.

[0061] (C) The water treatment device 10 of the present embodiment described above is characterized in that the clamping portion 39 is formed as a recess 39, and at least a portion of the electrolytic cell casing 34a is engageable with the recess 39.

[0062] The water treatment device 10 of the present embodiment is configured as described above in (C), so that the electrolytic cell housing 34a can be engaged and clamped in the recess 39 of the clamping portion 39. As a result, the water treatment device 10 of the present embodiment can reliably hold the electrolytic cell housing 34a in the electrolytic water tank 38, and the clamping portion 39 can prevent the electrolytic cell housing 34a from expanding due to the internal pressure. Therefore, the water treatment device 10 of the present embodiment can prevent the electrolytic cell 33 from cracking or being damaged. Furthermore, in the water treatment device 10 of the present embodiment, at least a part of the electrolytic cell housing 34a is accommodated in the recess 39 by the engagement between the electrolytic cell housing 34a and the recess 39. As a result, the water treatment device 10 of the present embodiment can protect the electrolytic cell 33 without providing a separate reinforcing member or the like for reinforcing the electrolytic cell 33, so that the water treatment device 10 can be prevented from becoming large and the cost can be prevented from increasing.

[0063] (D) The water treatment device 10 of the present embodiment described above includes a reverse osmosis membrane treatment device 40 connected to the electrolysis device 30 and performing reverse osmosis membrane treatment on the dissolved hydrogen water 3, and a control device 200 that controls the electrolysis device 30. The electrolysis device 30 has at least one electrolytic cell 33, an electrolyzed water tank 38 is connected to the reverse osmosis membrane treatment device 40 and is capable of supplying the dissolved hydrogen water 3 to the reverse osmosis membrane treatment device 40, a circulation flow path 50 is connected to the electrolyzed water tank 38, and the dissolved hydrogen water 3 is circulated to return to the electrolyzed water tank 38. The circulation flow path 50 is connected by piping to an external device 150 connected via the reverse osmosis membrane treatment device 40 and a circulation flow path connected electrolytic cell 33D, which is at least one of the electrolytic cells 33. The control device 200 controls the dissolved hydrogen water 3 flowing out from the electrolyzed water tank 38 to be supplied to the external device 150 via the reverse osmosis membrane treatment device 40, and then returned to the electrolyzed water tank 38 via the circulation flow path connected electrolytic cell 33D.

[0064] In the water treatment device 10 of the present embodiment, the hydrogen concentration of the recovered dissolved hydrogen water 5A is increased by re-electrolysis in the circulation flow path connected electrolytic cell 33D, and then the recovered dissolved hydrogen water 5A is returned to the electrolytic water tank 38 as dissolved hydrogen water 3 (corresponding to the reverse osmosis dissolved hydrogen water 5 in the present embodiment). Therefore, the hydrogen concentration of the dissolved hydrogen water 3 stored in the electrolytic water tank 38 is stabilized. In addition, the dissolved hydrogen water 3 flowing out from the electrolytic water tank 38 is returned to the RO tank 44 via the reverse osmosis membrane treatment device 40. In this way, in the water treatment device 10 of the present embodiment, the recovered dissolved hydrogen water 5A is not directly returned to the RO tank 44, so that the hydrogen concentration of the reverse osmosis dissolved hydrogen water 5 can be stabilized. In addition, in the water treatment device 10 of the present embodiment, the recovered dissolved hydrogen water 5A is returned to the circulation flow path connected electrolytic cell 33D in which expansion is suppressed, so that the influence of the water pressure on the recovered dissolved hydrogen water 5A (electrolytic water) can be suppressed. In addition, the water treatment device 10 of this embodiment is configured to return the recovered dissolved hydrogen water 5A to the circulation flow path connected electrolytic cell 33D, so that the recovered dissolved hydrogen water 5A does not directly flow into the piping. As a result, the water treatment device 10 of this embodiment can prevent the piping from being damaged by the influence of water pressure or the like.

[0065] (E) The water treatment device 10 of the present embodiment described above is characterized in that a plurality of electrolytic cells 33 are provided, and the control device 200 controls the second current value passing to the electrode 35 in the circulation flow path-connected electrolytic cell 33D and the first current value passing to the electrode 35 in the circulation flow path-unconnected electrolytic cells 33A, 33B, 33C that are not connected to the circulation flow path 50 among the electrolytic cells 33 so as to be different values.

[0066] The water treatment device 10 of this embodiment, by being configured as described above in (E), can have different current values ​​flowing through the electrolytic cell 33D connected to the circulation flow path for re-electrolyzing the recovered dissolved hydrogen water 5A and the electrolytic cells 33A, 33B, and 33C not connected to the circulation flow path for electrolyzing the raw water 2. This allows the water treatment device 10 of this embodiment to stabilize the concentration of dissolved hydrogen water 3 supplied to the electrolyzed water tank 38. Specifically, the electrolytic cells 33A, 33B, and 33C not connected to the circulation flow path on the raw water 2 side have a low hydrogen concentration, so the first current value is increased, and the electrolytic cell 33D connected to the circulation flow path to which the recovered dissolved hydrogen water 5A is returned has a relatively high hydrogen concentration, so the second current value is reduced.

[0067] (F) In the water treatment device 10 of the present embodiment described above, the control device 200 is characterized in that it controls the flow of electricity to the electrodes 35 in the circulation flow-path connected electrolytic cell 33D or the circulation flow-path unconnected electrolytic cells 33A, 33B, 33C so that the second hydrogen concentration in the dissolved hydrogen water 3 flowing out from the circulation flow-path connected electrolytic cell 33D approaches the first hydrogen concentration in the dissolved hydrogen water 3 stored in the electrolytic water tank 38.

[0068] The water treatment device 10 of the present embodiment, by being configured as in (F) above, can increase the hydrogen concentration of the recovered dissolved hydrogen water 3 having a low hydrogen concentration (second hydrogen concentration) and bring it closer to the first hydrogen concentration that is originally expected. Specifically, the electrolytic cells 33A, 33B, and 33C not connected to the circulation flow path on the raw water 2 side have a low hydrogen concentration, so the first current value is increased, and the electrolytic cell 33D connected to the circulation flow path to which the recovered dissolved hydrogen water 5A is returned has a relatively high hydrogen concentration, so the second current value is decreased. As a result, the water treatment device 10 of the present embodiment can stabilize the hydrogen concentration of the dissolved hydrogen water 3 stored in the electrolytic water tank 38, so that the hydrogen concentration of the dissolved hydrogen water 3 to be supplied to the reverse osmosis membrane treatment device 40 is stabilized. That is, the water treatment device 10 of the present embodiment can stabilize the hydrogen concentration of the reverse osmosis dissolved hydrogen water 5 because the recovered dissolved hydrogen water 5A is not directly returned to the RO tank 44.

[0069] (G) The water treatment device 10 of this embodiment includes an electrolysis device 30 having electrodes 35 and at least one electrolysis cell 33, and generating dissolved hydrogen water 3 by electrolyzing raw water 2, a reverse osmosis membrane treatment device 40 connected to the electrolysis device 30 and performing reverse osmosis membrane treatment on the dissolved hydrogen water 3, an electrolyzed water tank 38 that stores the dissolved hydrogen water 3 and is capable of supplying the dissolved hydrogen water 3 to the reverse osmosis membrane treatment device 40, and a circulation flow path connected to the electrolyzed water tank 38 and allowing the dissolved hydrogen water 3 to flow out and circulate back to the electrolyzed water tank 38. The circulation flow path 50 is equipped with an external device 150 connected via a reverse osmosis membrane treatment device 40, and a circulation flow path-connected electrolytic cell 33D, which is at least one of the electrolytic cells 33, and the control device 200 controls the dissolved hydrogen water 3 flowing out from the electrolytic water tank 38 to be supplied to the external device 150 via the reverse osmosis membrane treatment device 40, and then returned to the electrolytic water tank 38 via the circulation flow path-connected electrolytic cell 33D.

[0070] The water treatment device 10 of this embodiment is configured as described above in (G), so that the recovered dissolved hydrogen water 5A has its hydrogen concentration increased by re-electrolysis in the circulation flow path-connected electrolytic cell 33D, and is then supplied to the electrolyzed water tank 38 as dissolved hydrogen water 3. This stabilizes the hydrogen concentration of the dissolved hydrogen water 3 stored in the electrolyzed water tank 38. In addition, the dissolved hydrogen water 3 flowing out of the electrolyzed water tank 38 is returned to the RO tank 44 via the reverse osmosis membrane treatment device 40. As a result, in the water treatment device 10 of this embodiment, the recovered dissolved hydrogen water 5A is not returned directly to the RO tank 44, so the hydrogen concentration of the reverse osmosis dissolved hydrogen water 5 can be stabilized.

[0071] (H) The water treatment device 10 of the present embodiment described above is characterized in that a plurality of electrolytic cells 33 are provided, and the control device 200 controls the second current value passing to the electrode 35 in the circulation flow path-connected electrolytic cell 33D and the first current value passing to the electrode 35 in the circulation flow path-unconnected electrolytic cells 33A, 33B, 33C that are not connected to the circulation flow path 50 among the electrolytic cells 33 so as to be different values.

[0072] The water treatment device 10 of this embodiment, by being configured as described above in (H), can have different current values ​​flowing through the circulation flow path connected electrolytic cell 33D for re-electrolyzing the recovered dissolved hydrogen water 5A and the circulation flow path unconnected electrolytic cells 33A, 33B, and 33C for electrolyzing the raw water 2. This allows the water treatment device 10 of this embodiment to efficiently perform current control for stabilizing the concentration of the dissolved hydrogen water 3 supplied to the electrolyzed water tank 38.

[0073] (I) In the water treatment device 10 of the present embodiment described above, the control device 200 is characterized in that it controls the flow of electricity to the electrodes 35 in either or both of the circulation flow-path connected electrolytic cell 33D and the circulation flow-path unconnected electrolytic cells 33A, 33B, 33C so that the second hydrogen concentration in the dissolved hydrogen water 3 flowing out from the circulation flow-path connected electrolytic cell 33D approaches the first hydrogen concentration in the dissolved hydrogen water 3 stored in the electrolytic water tank 38.

[0074] The water treatment device 10 of the present embodiment, by being configured as described above in (I), can increase the hydrogen concentration of the recovered dissolved hydrogen water 5A having a low hydrogen concentration (second hydrogen concentration) to approach the first hydrogen concentration that is originally expected. Specifically, the electrolytic cells 33A, 33B, and 33C not connected to the circulation flow path on the raw water 2 side have a low hydrogen concentration, so that the first current value is increased, and the electrolytic cell 33D connected to the circulation flow path to which the recovered dissolved hydrogen water 5A is returned has a relatively high hydrogen concentration, so that the second current value is decreased. As a result, the water treatment device 10 of the present embodiment can stabilize the hydrogen concentration of the dissolved hydrogen water 3 stored in the electrolytic water tank 38, so that the hydrogen concentration of the dissolved hydrogen water 3 to be supplied to the reverse osmosis membrane treatment device 40 is stabilized. That is, the water treatment device 10 of the present embodiment can stabilize the hydrogen concentration of the reverse osmosis dissolved hydrogen water 5 because the recovered dissolved hydrogen water 5A is not directly returned to the RO tank 44.

[0075] (J) The water treatment device 10 of the above-described embodiment is characterized in that at least a portion of the tank casing 38a constituting the electrolytic water tank 38 is in contact with the electrolytic cell casing 34a constituting the electrolytic cell 33.

[0076] In the water treatment device 10 of the present embodiment, the electrolytic cell housing 34a constituting the electrolytic cell 33 is supported by at least a part of the tank housing 38a constituting the electrolytic water tank 38 by the configuration as described above in (J). Therefore, the water treatment device 10 of the present embodiment can prevent the electrolytic cell 33 from expanding or cracking due to the pressure of the raw water 2 or the electrolytic water. Furthermore, the water treatment device 10 of the present embodiment can protect the electrolytic cell 33 without providing a separate reinforcing member or the like for reinforcing the electrolytic cell 33, so that the water treatment device 10 can be prevented from becoming large and the cost can be prevented from increasing. Here, the portion where the tank housing 38a contacts the electrolytic cell housing 34a is not particularly limited, but it is preferable that the tank housing 38a contacts a side portion of the electrolytic cell housing 34a where the electrolytic cell housing 34a is likely to expand, for example.

[0077] (K) The water treatment device 10 of the above-described embodiment is characterized in that the tank casing 38a has a clamping portion 39 capable of clamping the electrolytic cell casing 34a from at least two directions, and the electrolytic cell casing 34a is clamped by the clamping portion 39.

[0078] In the water treatment device 10 of this embodiment, the electrolytic cell housing 34a can be sandwiched from two directions by being configured as described above in (K). This makes it possible to prevent the electrolytic cell 33 from expanding due to the internal pressure, and therefore to prevent the electrolytic cell 33 from cracking or being damaged.

[0079] (L) In the water treatment device 10 of the present embodiment described above, the clamping portion 39 is formed as a recess 39 , and at least a part of the electrolytic cell casing 34 a is engageable with the recess 39 .

[0080] The water treatment device 10 of the present embodiment is configured as in (L) above, so that the electrolytic cell housing 34a can be engaged and clamped in the recess 39 of the clamping portion 39. As a result, the water treatment device 10 of the present embodiment can reliably hold the electrolytic cell housing 34a in the electrolytic water tank 38, and the clamping portion 39 can prevent the electrolytic cell housing 34a from expanding due to the internal pressure. Therefore, the water treatment device 10 of the present embodiment can prevent the electrolytic cell 33 from cracking or being damaged. Furthermore, in the water treatment device 10 of the present embodiment, at least a part of the electrolytic cell housing 34a is accommodated in the recess 39 by the engagement between the electrolytic cell housing 34a and the recess 39. As a result, the water treatment device 10 of the present embodiment can protect the electrolytic cell 33 without providing a separate reinforcing member or the like for reinforcing the electrolytic cell 33, so that the water treatment device 10 can be prevented from becoming large and the cost can be prevented from increasing.

[0081] The water treatment device 10 of the present invention can be modified as appropriate without departing from the spirit of the present invention, and is not limited to those exemplified in the above embodiment or those related to (A) to (L) above, but may have configurations such as those of the following modified examples. Modified examples of the water treatment device 10 will be described below. In the description of the modified examples, the same reference numerals will be used to designate configurations similar to those of the water treatment device 10 according to the above embodiment, and detailed description will be omitted.

[0082] <<Variations>>

[0083] As shown in FIG. 6, in the water treatment device 10 according to the modified example, a plurality of electrolytic cells 33 are arranged side by side rather than stacked vertically (two electrolytic cells 33, 33 in this modified example). In the water treatment device 10 according to the modified example, at least a portion of the two electrolytic cells 33, 33 is in contact with each other. In the water treatment device 10 according to the modified example, one is configured as a circulation flow path connected electrolytic cell 33D, and the other is configured as a circulation flow path unconnected electrolytic cell 33A. The electrolytic cell 33 has the same configuration as in the above-described embodiment. Note that in FIG. 6, configurations other than the electrolytic cell 33 are not shown.

[0084] The water treatment device 10 according to the modified example has, in addition to the characteristic configurations (A) to (L) described above, a characteristic configuration related to the following (M), which is intended to provide the following unique effects.

[0085] (M) The water treatment device 10 of the present embodiment described above is characterized in that the electrolysis device 30 has a plurality of electrolysis cells 33, and at least two of the electrolysis cell casings 34a are at least partially in contact with each other.

[0086] By configuring the water treatment device 10 of this embodiment as described above in (M), the expansion of the electrolytic cell casings 34a can be cancelled out at the mutually contacting portions of the electrolytic cell casings 34a. Therefore, the water treatment device 10 of this embodiment can suppress the expansion of the electrolytic cell casings 34a. Furthermore, the water treatment device 10 of this embodiment can protect the electrolytic cell 33 without providing a separate reinforcing member or the like for reinforcing the electrolytic cell 33, and therefore suppresses the water treatment device 10 from becoming larger and increasing in cost.

[0087] Other Modifications The water treatment device 10 according to the above-described embodiment and modified examples is merely one example of the water treatment device 10 of the present invention, and can be modified as appropriate without departing from the spirit and scope of the present invention.

[0088] In this embodiment, the electrolysis device 30 has four electrolytic baths 33, but various numbers of electrolytic baths 33, from one to multiple, may be provided. From the viewpoint of stabilizing the hydrogen concentration of the dissolved hydrogen water 3 in the electrolyzed water tank 38, it is desirable to provide at least two electrolytic baths 33, a circulation flow path connected electrolytic bath 33D and a circulation flow path unconnected electrolytic bath 33A. The shape, size and configuration of the electrolytic bath 33 are not limited to those described in the embodiment, and various shapes, sizes and configurations may be used.

[0089] In this embodiment, the electrolytic water tank 38 is formed in a cylindrical shape, but the shape and size of the electrolytic water tank 38 can be various shapes and sizes. The clamping portion 39 formed in the electrolytic water tank 38 is not limited to the recess 39, and can be formed in various shapes and sizes. The clamping portion 39 and the recess 39 may be provided as necessary, and the electrolytic water tank 38 may be configured without the clamping portion 39 and the recess 39. In such a case, it is desirable to configure the tank housing 38a in the electrolytic water tank 38 and the electrolytic cell housing 34a so that at least a part of them contact each other. In addition, the manner in which the tank housing 38a and the electrolytic cell housing 34a contact each other can be various. In such a case, it is desirable that the tank housing 38a and the electrolytic cell housing 34a contact each other by line contact or surface contact. In addition, the entire electrolytic cell housing 34a may be configured to contact the tank housing 38a.

[0090] In this embodiment, the ultrafiltration devices 46b and 48a are provided in the circulation flow path 50, but these may be provided as necessary, and the configuration may be such that one or both of them are not provided. In addition, the external device 150 is not limited to the hemodialysis system 300 and the dialyzers 170 and 180, and various devices can be used.

[0091] In this embodiment, the control device 200 controls the second current value passing through the electrode 35 in the circulation flow path connected electrolytic cell 33D and the first current value passing through the electrode 35 in the circulation flow path unconnected electrolytic cells 33A, 33B, and 33C that are not connected to the circulation flow path 50 among the electrolytic cells 33 so that they are different values, but the present invention is not limited to this. For example, the water treatment device 10 of the present invention can also control the first current value and the second current value to be the same. In addition, the first current value and the second current value can be set to various current values ​​depending on the hydrogen concentration in the dissolved hydrogen water 3. In addition, the hydrogen concentration of the dissolved hydrogen water 3 generated in the electrolytic cell 33 can be set to various concentrations as necessary. In addition, the range in which the hydrogen concentration (second hydrogen concentration) in the recovered dissolved hydrogen water 5A and the hydrogen concentration (first hydrogen concentration) in the dissolved hydrogen water 3 generated from the raw water 2 are made to approach each other can be set to various ranges depending on the required hydrogen concentration of the dissolved hydrogen water 3.

[0092] The present invention is not limited to the configurations described in the above-mentioned embodiments, and appropriate design modifications and the like are possible within the scope of the technical idea of ​​the present invention. The components of the above-mentioned embodiments and modifications may be arbitrarily selected and combined. Any component of each embodiment or modification may be arbitrarily combined with any component described in the means for solving the problems, the mode for carrying out the invention, etc., or any component that embodies any component described in the means for solving the problems, the mode for carrying out the invention, etc. The present invention also intends to obtain rights to these in this application or in a divisional application based on this application. [Industrial Applicability]

[0093] INDUSTRIAL APPLICABILITY The present invention can be suitably used in, for example, dialysis fluid supplying devices that produce dialysis fluid used in hemodialysis, and in water treatment devices in general that produce reverse osmosis dissolved hydrogen water to be supplied to external devices such as dialyzers. [Explanation of symbols]

[0094] 2: Raw water 3: Dissolved hydrogen water 5: Reverse osmosis dissolved hydrogen water 5A: Recovered dissolved hydrogen water (reverse osmosis dissolved hydrogen water) 10: Water treatment equipment 30: Hydrogen dissolving device 33: Electrolytic cell 33A: Electrolytic cell without circulation flow path (electrolytic cell) 33B: Electrolytic cell not connected to the circulation flow path (electrolytic cell) 33C: Electrolytic cell without circulation flow path (electrolytic cell) 33D: Circulation flow path connected electrolytic cell (electrolytic cell) 34a: Electrolyzer housing 35: Electrode 38: Electrolyzed water tank 38a: Tank housing 39: Clamping part (recess) 40: Reverse osmosis membrane treatment device 44: RO tank 50: Circulation flow path 150: External device 170: Dialyzer 180: Dialyzer 200: Control device 300: Hemodialysis system

Claims

1. An electrolysis device having electrodes and an electrolytic cell, which generates dissolved hydrogen water by electrolyzing raw water; An electrolytic water tank for storing the dissolved hydrogen water; Equipped with At least a part of a tank housing constituting the electrolytic water tank is in direct contact with an electrolytic cell housing constituting the electrolytic cell, The tank housing has a clamping portion capable of clamping the electrolytic cell housing from at least two directions, The water treatment device, wherein the electrolytic cell housing is clamped by the clamping portion.

2. The electrolysis device includes a plurality of the electrolytic cells, 2. The water treatment device of claim 1, wherein at least two of the electrolytic cell housings are in contact with each other at least in part.

3. The clamping portion is formed as a recess, The water treatment device of claim 1 , wherein at least a portion of the electrolytic cell housing is engageable with the recess.

4. a reverse osmosis membrane treatment device connected to the electrolysis device and performing reverse osmosis membrane treatment on the dissolved hydrogen water; A control device that controls the electrolysis device; Equipped with the electrolysis device comprises at least one of the electrolytic cells; The electrolytic water tank is connected to the reverse osmosis membrane treatment device and is capable of supplying the dissolved hydrogen water to the reverse osmosis membrane treatment device, A circulation flow path is connected to the electrolytic water tank, which causes the dissolved hydrogen water to flow out and return to the electrolytic water tank, an external device connected via the reverse osmosis membrane treatment device and a circulation flow path-connected electrolytic cell which is at least one of the electrolytic cells are connected to the circulation flow path through a pipe; The water treatment device according to claim 1 or 2, characterized in that the control device controls the dissolved hydrogen water flowing out of the electrolytic water tank to be supplied to the external device via the reverse osmosis membrane treatment device, and then returned to the electrolytic water tank via the circulation flow path connected electrolytic cell.

5. A plurality of the electrolytic cells are provided, 5. The water treatment device according to claim 4, wherein the control device controls a second current value passing through the electrodes in the circulation flow path-connected electrolytic cell and a first current value passing through the electrodes in a circulation flow path-unconnected electrolytic cell, which is one of the electrolytic cells and is not connected to the circulation flow path, to be different values.

6. The water treatment device of claim 5, wherein the control device controls the supply of electricity to the electrodes in either one or both of the electrolytic cell connected to the circulation flow path and the electrolytic cell not connected to the circulation flow path so that the second hydrogen concentration of the dissolved hydrogen water flowing out from the electrolytic cell connected to the circulation flow path approaches the first hydrogen concentration of the dissolved hydrogen water stored in the electrolytic water tank.

7. An electrolysis device having electrodes and at least one electrolytic cell, which generates dissolved hydrogen water by electrolyzing raw water; a reverse osmosis membrane treatment device connected to the electrolysis device and performing reverse osmosis membrane treatment on the dissolved hydrogen water; an electrolytic water tank for storing the dissolved hydrogen water and supplying the dissolved hydrogen water to the reverse osmosis membrane treatment device; A circulation flow path connected to the electrolytic water tank, for discharging the dissolved hydrogen water and circulating it back to the electrolytic water tank; A control device that controls the electrolysis device; Equipped with an external device connected via the reverse osmosis membrane treatment device and a circulation flow path-connected electrolytic cell which is at least one of the electrolytic cells are connected to the circulation flow path through a pipe; The control device controls the dissolved hydrogen water flowing out of the electrolytic water tank to be supplied to the external device via the reverse osmosis membrane treatment device, and then returned to the electrolytic water tank via the circulation flow path connected electrolytic cell.

8. A plurality of the electrolytic cells are provided, 8. The water treatment device according to claim 7, wherein the control device controls a second current value passing through the electrodes in the circulation flow path-connected electrolytic cell and a first current value passing through the electrodes in a circulation flow path-unconnected electrolytic cell among the electrolytic cells that is not connected to the circulation flow path to be different values.

9. The water treatment device of claim 8, wherein the control device controls the supply of electricity to the electrodes in either one or both of the electrolytic cell connected to the circulation flow path and the electrolytic cell not connected to the circulation flow path so that the second hydrogen concentration of the dissolved hydrogen water flowing out from the electrolytic cell connected to the circulation flow path approaches the first hydrogen concentration of the dissolved hydrogen water stored in the electrolytic water tank.

10. 9. The water treatment device according to claim 7, wherein at least a portion of a tank housing constituting the electrolytic water tank is in contact with an electrolytic cell housing constituting the electrolytic cell.

11. The tank housing has a clamping portion capable of clamping the electrolytic cell housing from at least two directions, The water treatment device according to claim 10 , wherein the electrolytic cell housing is clamped by the clamping portion.

12. The clamping portion is formed as a recess, 12. The water treatment device of claim 11, wherein at least a portion of the electrolytic cell housing is engageable with the recess.

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