Electrolyzed water generating device and cleaning method of electrolyzed water generating device

Abstract

The present invention provides an electrolytic water generating device and a cleaning method for the electrolytic water generating device, which can more reliably discharge water stored in the device after backwashing. The electrolytic water generating device (300) is provided with a flow path switching valve (90) arranged at a branch portion (B1) between a main input flow path (3M) and a main bypass flow path (6M). Furthermore, the flow path switching valve (90) is used to switch between a first mode and a second mode. In the first mode, the water inlet (3aM) can be connected to the main input flow path (3M), and the water inlet (3aM) can be connected to the main bypass flow path (6M). In the second mode, the drain port (5aA) can be connected to the main input flow path (3M), and the drain port (5aA) can be connected to the main bypass flow path (6M).

Description

Technical Field

[0001] The invention relates to an electrolytic water generating device and a cleaning method of the electrolytic water generating device. Background Art

[0002] In the past, for example, electrolysis water generating devices for generating drinking water for a household have been developed. In such conventional electrolysis water generating devices, as disclosed in Patent Document 1 described below, the electrolysis water generating device has a first electrolytic cell and a second electrolytic cell connected in series in a flow path.

[0003] In the above-mentioned conventional electrolytic water generating device, the first electrolytic cell includes: a first cathode chamber having a first cathode; and a first anode chamber having a first anode. In addition, the first electrolytic cell has a cation exchange membrane that separates the first cathode chamber from the first anode chamber. On the other hand, the second electrolytic cell includes: a second cathode chamber having a second cathode; and a second anode chamber having a second anode. In addition, the second electrolytic cell has a neutral diaphragm that separates the second cathode chamber from the second anode chamber, inhibits the passage of molecules, but allows the passage of cations and anions.

[0004] When such an electrolytic water generating device is used, water having a higher hydrogen concentration in the first cathode chamber can be supplied to the second cathode chamber for electrolysis, thereby obtaining alkaline ionized water having a relatively high dissolved hydrogen content and a relatively high pH value.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2018-187576 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] In order to maintain the performance of the electrodes disposed in the electrolytic cell, in the above-mentioned conventional electrolytic water generating device, it is preferable to enable a voltage to be applied to the electrodes with a polarity opposite to that during electrolysis while water is stored in the electrolytic cell, that is, to enable so-called reverse cleaning.

[0010] However, when backwashing is performed, the liquid property of the water stored in the first cathode chamber and the second cathode chamber becomes acidic. Moreover, such water is not suitable for drinking, and therefore, it is preferred that such water be discharged to the outside of the device after backwashing.

[0011] Therefore, an object of the present invention is to provide an electrolysis water generating device and a method for cleaning the electrolysis water generating device, which are capable of more reliably discharging water stored in the device after backwashing.

[0012] Solutions for solving problems

[0013] A technical solution of the present invention provides an electrolytic water generating device, wherein the electrolytic water generating device comprises: a first electrolytic cell, the first electrolytic cell comprising a first cathode chamber, a first anode chamber and a cation exchange membrane, the cation exchange membrane separating the first cathode chamber from the first anode chamber; a second electrolytic cell, the second electrolytic cell comprising a second cathode chamber, a second anode chamber and a neutral diaphragm, the neutral diaphragm separating the second cathode chamber from the second anode chamber, inhibiting the passage of molecules but allowing cations and anions to pass through; a water inlet; a main input flow path, which is connected to the The cathode side input flow path is connected to the water inlet; the cathode side input flow path is branched from the main input flow path and connected to the inlet of the first cathode chamber; the anode side input flow path is branched from the main input flow path and connected to the inlet of the first anode chamber; the cathode side switching flow path is connected to the outlet of the first cathode chamber and the inlet of the second cathode chamber; the anode side switching flow path is connected to the outlet of the first anode chamber and the inlet of the second anode chamber; the cathode side water spray flow path is connected to the outlet of the second cathode chamber; the anode side drainage flow path is connected to the second The outlet of the anode chamber is connected; a water spray port connected to the cathode side water spray flow path; a drain port connected to the anode side drain flow path; a main bypass flow path branched from the main input flow path; a cathode side bypass flow path branched from the main bypass flow path and connected to the cathode side switching flow path; an anode side bypass flow path branched from the main bypass flow path and connected to the anode side switching flow path; a flow path switching valve arranged at a branching portion between the main input flow path and the main bypass flow path; a reverse cleaning drain flow path connected to the branching The branch is connected to the anode side drainage flow path; and a drain valve is arranged between the branch portion between the anode side drainage flow path and the reverse cleaning drainage flow path and the drain port, the flow path switching valve is configured to be able to switch between a first mode and a second mode, in the first mode, the water inlet can be connected to the main input flow path, the water inlet can be connected to the main bypass flow path, and in the second mode, the drain port can be connected to the main input flow path, and the drain port can be connected to the main bypass flow path.

[0014] Effects of the Invention

[0015] According to the present invention, it is possible to obtain an electrolysis water generating device and a method for cleaning an electrolysis water generating device that can more reliably discharge water stored in the device after backwashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a diagram schematically showing the overall structure of the electrolysis water generating device according to the embodiment.

[0017] Figure 2 It is a diagram for explaining the chemical action of the cation exchange membrane of the electrolysis water generating device according to the embodiment.

[0018] Figure 3 It is a diagram for explaining the chemical action occurring inside the first electrolytic cell of the electrolysis water generating device according to the embodiment.

[0019] Figure 4 This is a diagram showing that the amount of other cations accumulated in the cation exchange membrane in the first electrolytic cell is considerable when no DC voltage is applied between the first cathode and the first anode and flowing water passes through the first electrolytic cell in the electrolysis water generating device of the embodiment.

[0020] Figure 5 It is a diagram for explaining the chemical action occurring inside the second electrolytic cell of the electrolysis water generating device according to the embodiment.

[0021] Figure 6 It is a diagram schematically showing a state after the electrolysis water generating apparatus according to the embodiment is switched to the second mode by the flow path switching valve.

[0022] Figure 7 It is a diagram schematically showing a state after the electrolysis water generating apparatus according to the embodiment is switched to the first mode by the flow path switching valve.

[0023] Figure 8 This is a diagram for explaining the operation of the electrolysis water generating device according to the embodiment at the time of initial water flow.

[0024] Fig. 9 This is a diagram for explaining the operation when the hydrogen-rich water mode of the electrolysis water generator according to the embodiment is selected.

[0025] Fig.10 This is a diagram for explaining the operation when the alkaline ion water mode of the electrolysis water generating device according to the embodiment is selected.

[0026] Fig.11 This is a diagram for explaining the operation when the purified water mode of the electrolysis water generating device according to the embodiment is selected.

[0027] Fig.12 This is a diagram for explaining a reverse cleaning method of the electrolysis water generating apparatus according to the embodiment, and is a diagram for explaining a state in which the second electrolytic cell is reverse cleaned before the first electrolytic cell.

[0028] Fig.13 It is a diagram for explaining the reverse cleaning method of the electrolysis water generating apparatus according to the embodiment, and is a diagram for explaining a state in which the first electrolysis cell is reverse cleaned after the second electrolysis cell is reverse cleaned.

[0029] Fig.14 This is a diagram for explaining a method for backwashing the electrolytic water generating device according to the embodiment, and is a diagram for explaining a state in which water in the device is discharged after backwashing.

[0030] Fig.15 This is a diagram for explaining a reverse cleaning method of an electrolytic water generating apparatus according to a comparative example, and is a diagram for explaining a state in which the first electrolytic cell is reverse cleaned before the second electrolytic cell.

[0031] Fig.16 This is a diagram for explaining a reverse cleaning method of an electrolytic water generating apparatus according to a comparative example, and is a diagram for explaining a state in which the second electrolytic cell is reverse cleaned after the first electrolytic cell is reverse cleaned.

[0032] Fig.17 This is a diagram for explaining a backwashing method of the electrolysis water generating apparatus according to the embodiment, and is a diagram for explaining a state in which backwashing is performed while water is flowing.

[0033] Description of Reference Numerals

[0034] 1A, the first anode; 1C, the first cathode; 2A, the second anode; 2C, the second cathode; 3aM, the water inlet; 3A, the anode side input flow path; 3C, the cathode side input flow path; 3M, the main input flow path; 4A, the anode side transfer flow path; 4aA, the activated carbon; 4C, the cathode side transfer flow path; 5, the output flow path; 5A, the anode side drainage flow path; 5aA, the drainage port; 5C, the cathode side water spray flow path; 5aC, the water spray port; 6, the bypass flow path; 6A, the anode side bypass flow path; 6C, the cathode side bypass flow path; 6M, the main bypass flow path; 7. Backwash drainage flow path; 10. Cation exchange membrane; 10A. 1st anode chamber; 10aA. Anode side buffer space (space); 10C. 1st cathode chamber; 10aC. Cathode side buffer space (space); 20. Neutral diaphragm; 20A. 2nd anode chamber; 20C. 2nd cathode chamber; 80. Control unit; 90. Flow path switching valve; 91. Force member; 92. Solenoid valve; 94. Drain valve; 95. Open valve; 96. Solenoid valve; 100. 1st electrolytic cell; 200. 2nd electrolytic cell; 300. Electrolyzed water generating device. DETAILED DESCRIPTION

[0035] Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. However, unnecessary detailed descriptions may be omitted. For example, detailed descriptions of already known matters or repeated descriptions of substantially the same structures may be omitted.

[0036] In addition, the accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present invention, and are not intended to limit the subject matter described in the claims.

[0037] First, use Figure 1 to Figure 7 The electrolysis water generating device 300 of this embodiment will be described.

[0038] Figure 1 Schematically shows the overall structure of the electrolytic water generating device according to the embodiment. Figure 1 As shown, the electrolysis water generating device 300 of the present embodiment is a device capable of generating electrolytically treated water such as alkaline ion water, and includes a housing 310 in which a flow path for flowing water is arranged.

[0039] A pipe (water spray pipe) constituting a part of the cathode side water spray flow path 5C having the water spray port 5aC protrudes from the housing 310. In addition, a pipe (drain pipe) constituting a part of the anode side drain flow path 5A having the drain port 5aA also protrudes from the housing 310. The details of the flow path of flowing water will be described later.

[0040] Such an electrolytic water generating device 300 can be used, for example, in a state where the housing 310 is arranged on the upper surface of the kitchen sink K so that the drain port 5aA is located in the water tank portion Ka. If so, desired water such as alkaline ion water generated by the electrolytic water generating device 300 can be taken out from the water spout 5aC, and water not suitable for drinking such as acidic water can be discharged from the drain port 5aA to the water tank portion Ka.

[0041] like Figure 1 As shown in FIG. 3 , the electrolytic water generating device 300 includes a first electrolytic cell 100 and a second electrolytic cell 200 connected in series. In this embodiment, the first electrolytic cell 100 is disposed on the upstream side of the flow path of the flowing water, and the second electrolytic cell 200 is disposed on the downstream side of the flow path of the flowing water. By such an arrangement, when alkaline ionized water is desired, the flowing water can be selected to pass through the second electrolytic cell 200 after passing through the first electrolytic cell 100.

[0042] In addition, it is also possible to generate electrolytic hydrogen-rich water by using only the second electrolytic cell 200, that is, to increase both the pH and the hydrogen concentration of the flowing water. However, in this embodiment, in order to increase the degree of increase in the hydrogen concentration in the flowing water relatively more than the degree of increase in the pH value in the flowing water, in addition to the second electrolytic cell 200, the first electrolytic cell 100 is also provided.

[0043] The first electrolytic cell 100 includes a first cathode chamber 10C having a first cathode 1C and a first anode chamber 10A having a first anode 1A. The first cathode 1C and the first anode 1A are both composed of mesh, porous or solid flat plates coated with platinum metal and are arranged parallel to each other.

[0044] The first electrolytic cell 100 includes a cation exchange membrane 10 that partitions the first cathode chamber 10C from the first anode chamber 10A. As the cation exchange membrane 10, for example, a solid polymer material including a fluorine-based resin material having a sulfonic group (-SO3H) is used.

[0045] Furthermore, in the present embodiment, the first cathode 1C is arranged to contact one main surface of the cation exchange membrane 10, and the first anode 1A is arranged to contact the other main surface of the cation exchange membrane 10. However, as long as the desired cation exchange effect can be produced, the first cathode 1C may be arranged at a position separated from one main surface of the cation exchange membrane 10, and the first anode 1A may be arranged at a position separated from the other main surface of the cation exchange membrane 10.

[0046] Here, in the present embodiment, the first electrolytic tank 100 is disposed in the housing 310 with its lower end located on the upstream side and its upper end located on the downstream side. In addition, a space for storing water is provided at the upper portion of the first electrolytic tank 100 .

[0047] Specifically, the length of the first cathode 1C in the vertical direction and the length of the first anode 1A in the vertical direction are both shorter than the length of the cation exchange membrane 10 in the vertical direction, so that the first cathode 1C and the first anode 1A are in contact with the main surface of the cation exchange membrane 10 at the approximately center of the cation exchange membrane 10 in the vertical direction. That is, the cation exchange membrane 10 is arranged in a manner that the upper end and the lower end are exposed in the first cathode chamber 10C and the first anode chamber 10A.

[0048] Furthermore, the first cathode chamber 10C and the first anode chamber 10A are formed so that the flow path width of the upper and lower portions where the cation exchange membrane 10 is exposed is greater than the flow path width of the portion where the first cathode 1C and the first anode 1A exist. By setting it in this way, a cathode side buffer space (space) 10aC capable of storing water is formed in the upper portion of the first cathode chamber 10C. In addition, an anode side buffer space (space) 10aA capable of storing water is formed in the upper portion of the first anode chamber 10A.

[0049] As in the present embodiment, when the first cathode 1C and the first anode 1A are brought into contact with the main surface of the cation exchange membrane 10, water will flow in the narrow spaces of the first cathode chamber 10C and the first anode chamber 10A, respectively. In this way, if the space for water flow is narrow, when the water is stopped and reverse electrolysis is performed during the reverse cleaning described later, the first cathode 1C and the first anode 1A may not be immersed in water due to the generated gas (O2, H2), thereby reducing the cleaning effect (hindering electrolysis). Therefore, in the present embodiment, as described above, a buffer space (e.g., a space of about 10 mL) is provided at the upper portion of the first cathode chamber 10C and the upper portion of the first anode chamber 10A so that the water pushed out under the pressure of the generated gas can be replenished from the upper portion.

[0050] Next, use Figure 2 to Figure 4 The chemical reactions etc. occurring inside the first electrolytic cell will be described.

[0051] exist Figure 2 The displacement effect of the cation exchange resin constituting the cation exchange membrane 10 is schematically depicted in FIG. Figure 2 As shown in the figure, when the cation exchange membrane 10 is placed in flowing water, the hydrogen ions (H + ) and other cations in the flowing water. Thus, a cation exchange membrane 10 is obtained in which at least a portion of the hydrogen ions are replaced by other cations.

[0052] Examples of other cations in flowing water include potassium ions (K + ), calcium ions (Ca 2+ ), sodium ion (Na + ) and magnesium ions (Mg 2+ ) etc. Therefore, the cation exchange membrane 10 that has undergone cation exchange contains, for example, a compound having potassium sulfonate (-SO3K) and a compound having calcium sulfonate (-(SO3)2Ca). In addition, the cation exchange membrane 10 that has undergone cation exchange contains, for example, a compound having sodium sulfonate (-SO3Na) and a compound having magnesium sulfonate (-(SO3)2Mg).

[0053] When the flowing water flows into the first electrolytic cell 100, the hydrogen ions (H + ) and other cations in flowing water (such as K + , Ca 2+ 、Na + Mg 2+ ) to exchange. At this time, if you have used Figure 2 As described above, hydrogen ions are released from the cation exchange membrane 10 into the flowing water in the first cathode chamber 10C, and other cations in the flowing water are adsorbed on the cation exchange membrane 10. Figure 3 As shown, the cation exchange membrane 10 after cation exchange has a selective permeability that allows cations to pass from the first anode chamber 10A to the first cathode chamber 10C but does not allow anions to pass from the first cathode chamber 10C to the first anode chamber 10A.

[0054] In this state, in the first electrolytic cell 100, when a DC voltage is applied between the first cathode 1C and the first anode 1A, water is electrolyzed near the first cathode 1C, thereby generating hydroxide ions (OH － ) and hydrogen (H2). On the other hand, water is also electrolyzed near the first anode 1A, thereby generating hydrogen ions (H+ ) and oxygen (O2). During electrolysis, electrons do not flow directly in the flowing water between the first cathode 1C and the first anode 1A, but rather move in the flowing water through cations and anions, thereby forming the same situation as the case where electrons flow in the flowing water. However, the movement of anions is restricted by the cation exchange membrane 10. In this state, Figure 3 As shown, not only other cations (such as Ca 2+ ) are attracted to the first cathode 1C, and the cations in the first anode chamber 10A are also attracted to the first cathode 1C. As a result, in the first electrolytic cell 100, the same situation as when the electrons flow from the first cathode 1C to the first anode 1A via the flowing water is formed. In addition, the hydrogen ions generated near the first anode 1A flow toward the first cathode 1C through the cation exchange membrane 10. As a result, in the first cathode chamber 10C, the hydroxide ions (OH － ) and hydrogen ions (H + ) is neutralized, so that the pH rise in the first cathode chamber 10C can be suppressed. As a result, in the first cathode chamber 10C, the excess hydroxide ions are neutralized, so that the pH can be suppressed from becoming higher than the value within the expected range, and electrolytic hydrogen-rich water, that is, alkaline ion water, in which hydrogen gas is dissolved can be obtained.

[0055] In addition, when it is desired to obtain purified water from the electrolytic water generating device 300, no DC voltage is applied between the first cathode 1C and the first anode 1A. In this case, in the first electrolytic cell 100, other cations (Ca 2+ , Na + , K + ,Mg 2+ ) will not be attracted to the first cathode 1C. In this state, when flowing water is passed through the first electrolytic cell 100, Figure 4 It can be seen that the amount of other cations accumulated in the cation exchange membrane 10 in the first electrolytic cell 100 is increased compared to the case where electrolyzed water is obtained by the electrolyzed water generating device 300. Therefore, in the present embodiment, when purified water is obtained from the electrolyzed water generating device 300, flowing water is not allowed to pass through the first electrolytic cell 100. In addition, the operation of the electrolyzed water generating device 300 when purified water is obtained from the electrolyzed water generating device 300 will be described in detail below.

[0056] On the other hand, Figure 1As shown, the second electrolytic cell 200 includes: a second cathode chamber 20C having a second cathode 2C; and a second anode chamber 20A having a second anode 2A. The second cathode 2C and the second anode 2A are both composed of parallel flat plates in a mesh, porous or solid shape coated with a platinum group metal.

[0057] In addition, the second electrolytic cell 200 includes a neutral diaphragm 20, which separates the second cathode chamber 20C from the second anode chamber 20A, inhibits the passage of molecules, but allows the passage of cations and anions. Here, "neutral diaphragm 20 inhibits the passage of molecules" means that it can prevent almost all molecules in the molecules in the flowing water from passing through, but it may also be that the neutral diaphragm 20 cannot completely prevent 100% of the molecules in the flowing water from passing through. That is, "neutral diaphragm 20 inhibits the passage of molecules" means that the neutral diaphragm 20 can allow some of all molecules to pass through.

[0058] The neutral separator 20 is provided between the second cathode 2C and the second anode 2A to prevent the product in the second cathode chamber 20C from mixing with the product in the second anode chamber 20A. The neutral separator 20 is composed of, for example, a hydrophilized polytetrafluoroethylene (PTFE) film.

[0059] In the second electrolytic cell 200, when a DC voltage is applied between the second cathode 2C and the second anode 2A, generally Figure 5 As shown, potassium ions (K + ), magnesium ion (Mg 2+ ), calcium ions (Ca 2+ ) and sodium ions (Na + ) and other cations are attracted to the second cathode 2C. In addition, usually Figure 5 As shown, carbonate ions (CO3 2－ ), sulfate ion (SO3 2－ ), nitrate ion (NO3 － ) and chloride ions (Cl － ) and other anions are attracted to the second anode 2A. If the DC voltage between the second cathode 2C and the second anode 2A is large enough, water can be electrolyzed on the surface of the second cathode 2C and the surface of the second anode 2A, respectively. As a result, the following reactions occur at the second cathode 2C and the second anode 2A, respectively.

[0060] Cathode: 2H2O+2e － →H2+2OH －

[0061] Anode: 2H2O→O2+4H + +4e －

[0062] Therefore, hydroxide ions (OH － ) and hydrogen (H2). As a result, alkaline ionized water containing hydrogen and having a high pH value can be obtained. On the other hand, hydrogen ions (H + ) and oxygen (O2). As a result, acidic water containing oxygen and having a low pH value can be obtained.

[0063] In addition, if Figure 1 As shown, the electrolysis water generating device 300 of this embodiment includes an input flow path 3 for guiding flowing water to the first electrolytic cell 100. The input flow path 3 includes a main input flow path 3M, a cathode side input flow path 3C, and an anode side input flow path 3A.

[0064] In addition, in the present embodiment, the input flow path 3 includes a water inlet 3aM for introducing flowing water, and a main input flow path 3M is provided in a manner connected to the water inlet 3aM. Furthermore, the cathode side input flow path 3C branches out from the main input flow path 3M at the branch portion B2 and is connected to the inlet of the first cathode chamber 10C. On the other hand, the anode side input flow path 3A branches out from the main input flow path 3M at the branch portion B2 and is connected to the inlet of the first anode chamber 10A. A check valve 93 is arranged on the anode side input flow path 3A, and the check valve 93 is used to inhibit the water in the first anode chamber 10A from flowing back to the main input flow path 3M side through the anode side input flow path 3A. In addition, in the present embodiment, a throttling portion 3aA is formed at a position on the downstream side of the anode side input flow path 3A than the check valve 93.

[0065] The electrolytic water generating device 300 of the present embodiment includes a switching flow path 4 for guiding flowing water from the first electrolytic cell 100 to the second electrolytic cell 200. The switching flow path 4 includes a cathode-side switching flow path 4C and an anode-side switching flow path 4A.

[0066] The cathode-side switching flow path 4C connects the outlet of the first cathode chamber 10C and the inlet of the second cathode chamber 20C. On the other hand, the anode-side switching flow path 4A connects the outlet of the first anode chamber 10A and the inlet of the second anode chamber 20A.

[0067] In addition, in the present embodiment, activated carbon 4aA is arranged in the middle of the anode side switching flow path 4A. Specifically, the activated carbon 4aA is arranged at a position on the upstream side of the branch portion B3 of the anode side switching flow path 4A where it merges with the anode side bypass flow path 6A described later. In this way, if the activated carbon 4aA is arranged in the middle of the anode side switching flow path 4A, the hypochlorous acid generated in the first anode chamber 10A when the electrolytic hydrogen-rich water is generated in the first electrolytic cell 100 can be adsorbed and removed by the activated carbon 4aA in the middle of the flow in the anode side switching flow path 4A. As a result, it is possible to suppress the hypochlorous acid from being introduced into the second anode chamber 20C, thereby protecting the second anode chamber 20C.

[0068] The electrolytic water generating device 300 of the present embodiment includes an output flow path 5 for receiving flowing water from the second electrolytic cell 200. The output flow path 5 includes a cathode-side spray water flow path 5C and an anode-side drain flow path 5A.

[0069] The cathode side water spray flow path 5C is connected to the outlet of the second cathode chamber 20C, and a water spray port 5aC is connected to the downstream side of the cathode side water spray flow path 5C. In addition, in the present embodiment, the cathode side water spray flow path 5C is branched via the branch portion B7, and an open valve 95 is arranged at the top end of the branched flow path. As such an open valve 95, for example, a diaphragm type electromagnetic valve can be used.

[0070] In this embodiment, a normally closed electromagnetic valve that is normally closed and opened by driving is used as the opening valve 95. When the opening valve 95 is opened, air is introduced into the flow path, and water can be discharged from the drain port 5aA by air pressure. Therefore, the opening valve 95 is arranged so as to be located above the housing 310. If so, the opening valve 95 is arranged at a position higher than the drain port 5aA of the cathode side water spraying flow path 5C.

[0071] On the other hand, the anode side drainage flow path 5A is connected to the outlet of the second anode chamber 20A, and the above-mentioned drain port 5aA is connected to the downstream side of the anode side drainage flow path 5A. In addition, a drain valve 94 is arranged at a position upstream of the drain port 5aA of the anode side drainage flow path 5A, and water can be discharged from the drain port 5aA by opening the drain valve 94. The drain valve 94 can be composed of a normally closed type electromagnetic valve, for example. In addition, in the present embodiment, the drain valve 94 is arranged between the branch portion B4 between the anode side drainage flow path 5A and the reverse cleaning drainage flow path 7 described later and the drain port 5aA.

[0072] Furthermore, the electrolysis water generating device 300 of the present embodiment includes a bypass flow path 6. The bypass flow path 6 includes a main bypass flow path 6M, a cathode-side bypass flow path 6C, and an anode-side bypass flow path 6A.

[0073] The trunk bypass flow path 6M is connected to the trunk input flow path 3M at the branch portion B1. The cathode-side bypass flow path 6C branches off from the trunk bypass flow path 6M at the branch portion B5, and is connected to the cathode-side switching flow path 4C at the branch portion B6.

[0074] The cathode bypass flow path 6C is provided with a check valve 97 to prevent the water in the cathode switch flow path 4C from flowing back to the main bypass flow path 6M through the cathode bypass flow path 6C.

[0075] On the other hand, the anode bypass flow path 6A branches off from the trunk bypass flow path 6M at a branch portion B5, and is connected to the anode relay flow path 4A at a branch portion B3. A throttle portion 6aA is formed in the anode bypass flow path 6A.

[0076] In addition, the electrolysis water generating device 300 of the present embodiment further includes a reverse cleaning drainage flow path 7. One end of the reverse cleaning drainage flow path 7 is connected to the branch portion B1 between the main input flow path 3M and the main bypass flow path 6M, and the other end of the reverse cleaning drainage flow path 7 is connected to the anode side drainage flow path 5A at the branch portion B4. In addition, as described above, a drainage valve 94 is arranged at a position downstream of the branch portion B4 of the anode side drainage flow path 5A, and water and gas in the anode side drainage flow path 5A can be introduced from the branch portion B4 into the reverse cleaning drainage flow path 7.

[0077] The electrolyzed water generating device 300 of the present embodiment includes a flow path switching valve 90 provided at the branch portion B1 connecting the main input flow path 3M and the main bypass flow path 6M. As described above, the reverse washing drainage flow path 7 is also connected to the branch portion B1.

[0078] Here, in the present embodiment, the flow path can be switched between the first mode and the second mode by the flow path switching valve 90 .

[0079] Specifically, if Figure 6 and Figure 7 As shown in FIG. 1 , the main input flow path 3M is bent at a substantially right angle at the branch portion B1, and has a flow path extending in a substantially vertical direction (the flow path connected to the water inlet 3aM) and a flow path extending in a substantially horizontal direction (the flow path on the side connected to the first electrolytic cell 100). In addition, on the side of the branch portion B1 opposite to the main input flow path 3M extending in the substantially horizontal direction (on the side of the branch portion B1), Figure 6 and Figure 7 A main bypass flow path 6M extending in a substantially horizontal direction is connected to the branch portion B1 on the side opposite to the main input flow path 3M extending in a substantially vertical direction (on the right side in the figure). Figure 6 and Figure 7The reverse washing drainage flow path 7 extending in a substantially vertical direction is connected to the branch portion B1. Thus, in this embodiment, the flow path of the branch portion B1 is formed in a cross shape, and the four sides of the branch portion B1 (in Figure 6 and Figure 7 The middle direction is up, down, left, and right) in the open state.

[0080] Furthermore, a flow path switching valve 90 capable of closing the main input flow path 3M extending in the substantially vertical direction and the reverse washing drainage flow path 7 extending in the substantially vertical direction is disposed in the branch portion B1.

[0081] In the present embodiment, the flow path switching valve 90 has a shape in which two disks extending in a substantially horizontal direction are supported by pillars extending in a substantially vertical direction. However, the shape of the flow path switching valve 90 is not limited to this shape, and various shapes are possible.

[0082] In addition, in the present embodiment, when one of the two circular plates (the upper circular plate) closes the main input flow path 3M extending in the substantially vertical direction, the main input flow path 3M extending in the substantially horizontal direction, the main bypass flow path 6M, and the reverse washing drainage flow path 7 are opened. And, when the other of the two circular plates (the lower circular plate) closes the reverse washing drainage flow path 7, the main input flow path 3M extending in the substantially horizontal direction, the main bypass flow path 6M, and the main input flow path 3M extending in the substantially vertical direction are opened.

[0083] Thus, in this embodiment, by moving the flow path switching valve 90 up and down, the flow path can be switched between Figure 7 The first mode and Figure 6 Switch between the 2nd modes shown.

[0084] In addition, the first mode refers to, if Figure 7 As shown, the reverse washing drainage flow path 7 is closed, and the trunk input flow path 3M extending in the substantially horizontal direction, the trunk bypass flow path 6M, and the trunk input flow path 3M extending in the substantially vertical direction are open.

[0085] That is, in the first mode, the water inlet 3aM is in a state where it is possible to communicate with the main input flow path 3M. In addition, in the present embodiment, the communication between the water inlet 3aM and the main input flow path 3M refers to a state where flowing water can be introduced from the main input flow path 3M extending in a substantially vertical direction toward the main input flow path 3M extending in a substantially horizontal direction. And, in the first mode, the water inlet 3aM is in a state where it is possible to communicate with the main bypass flow path 6M. In the present embodiment, the communication between the water inlet 3aM and the main bypass flow path 6M refers to a state where flowing water can be introduced from the main input flow path 3M extending in a substantially vertical direction toward the main bypass flow path 6M extending in a substantially horizontal direction.

[0086] On the other hand, the second mode refers to Figure 6 As shown, the main input flow path 3M extending in the substantially vertical direction is closed, and the main input flow path 3M, the main bypass flow path 6M, and the reverse washing drainage flow path 7 extending in the substantially horizontal direction are open.

[0087] That is, in the second mode, the drain port 5aA is in a state where it can communicate with the main input flow path 3M. In addition, in the present embodiment, the communication between the drain port 5aA and the main input flow path 3M refers to a state where flowing water can be introduced from the reverse washing drain flow path 7 extending in a substantially vertical direction toward the main input flow path 3M extending in a substantially horizontal direction. And, in the second mode, the drain port 5aA is in a state where it can communicate with the main bypass flow path 6M. In the present embodiment, the communication between the drain port 5aA and the main bypass flow path 6M refers to a state where flowing water can be introduced from the reverse washing drain flow path 7 extending in a substantially vertical direction toward the main bypass flow path 6M extending in a substantially horizontal direction.

[0088] Furthermore, in the present embodiment, the flow path switching valve 90 is arranged at the branch portion B1 in a state where it is biased upward by a biasing member 91 such as a coil spring. Normally, under the action of the biasing member 91, the main input flow path 3M extending in a substantially vertical direction is closed by the flow path switching valve 90 (the flow path becomes the second mode).

[0089] When flowing water having a water pressure greater than a predetermined value is supplied from the water inlet 3aM, the flow path switching valve 90 overcomes the biasing force of the biasing member 91 and moves downward, and the reverse washing drainage flow path 7 is closed by the flow path switching valve 90 (the flow path is in the first mode).

[0090] As described above, in the present embodiment, the flow path switching valve 90 is urged by the urging member 91 , thereby setting the second mode when water is not supplied from the water inlet 3 aM, and setting the first mode when water is supplied from the water inlet 3 aM.

[0091] In addition, Figure 6 and Figure 7 In the embodiment, the case where the bending angle of the trunk input flow path 3M is substantially right angle is illustrated, but the trunk input flow path 3M can be bent into various angles. In addition, the connection direction of the trunk bypass flow path 6M and the connection direction of the reverse cleaning drainage flow path 7 can also be set to various directions. However, it is preferred that the reverse cleaning drainage flow path 7 is connected to the branch portion B1 on the opposite side of the flow path connected to the water inlet 3aM of the trunk input flow path 3M as described above. If so, the flow path can be switched between the first mode and the second mode using a flow path switching valve with a simpler structure.

[0092] Furthermore, in the present embodiment, a solenoid valve 92 is disposed near a portion of the main input flow path 3M located on the upstream side of the branch portion B2. The solenoid valve 92 is a normally open type solenoid valve that is normally open and is closed by driving.

[0093] In addition, the main bypass flow path is also provided with a solenoid valve 96, which is a normally closed type solenoid valve that is normally closed and opened by driving. In addition, as the solenoid valve 96, a pilot type solenoid valve can be used.

[0094] Thus, in the present embodiment, the solenoid valve 92 is arranged in the trunk input flow path 3M, and the solenoid valve 96 is arranged in the trunk bypass flow path 6M. Here, in the present embodiment, the solenoid valves 92 and 96 are controlled by the control unit 80 described later so that at least when the flow path is in the first mode, one of the solenoid valves 92 and 96 is opened and the other is closed.

[0095] Furthermore, the electrolytic water generating device 300 of the present embodiment is provided with a filter unit F for filtering raw water on the upstream side of the first electrolytic cell 100. Therefore, the water filtered by the filter unit F is used as flowing water passing through the first electrolytic cell 100 and the second electrolytic cell 200. Therefore, regardless of whether the electrolysis of the flowing water is performed, filtered water can be obtained from the cathode side water spraying flow path 5C. In the filter unit F, unnecessary components and foreign matter larger than a predetermined size contained in the raw water are removed by the filter. And the filtered water is generally referred to as the above-mentioned purified water. In addition, when the raw water itself is used as flowing water, the filter unit F may not be provided.

[0096] In addition, the electrolyzed water generating device 300 of the present embodiment is provided with a flow sensor S, which is arranged on the downstream side of the filter section F and is used to detect the flow rate of the flowing water introduced into the main input flow path 3M through the filter section F. By providing such a flow sensor S, it is possible to determine whether the flowing water sufficient to move the flow path switching valve 90 downward to close the reverse washing drainage flow path 7 (to set the flow path to the first mode) is introduced into the main input flow path 3M.

[0097] In addition, the switching control of the electromagnetic valves 92, 96, the drain valve 94 and the open valve 95 can also be performed by the switch operation of the user of the electrolysis water generating device 300. In addition, the control of the DC voltage applied between the first cathode 1C and the first anode 1A and the control of the DC voltage applied between the second cathode 2C and the second anode 2A can also be performed by the switch operation of the user of the electrolysis water generating device 300.

[0098] However, it is preferred that these controls are automated. Therefore, in the present embodiment, the electrolytic water generating device 300 further includes a control unit 80 for controlling the first electrolytic cell 100, the second electrolytic cell 200, the solenoid valves 92, 96, the drain valve 94, and the open valve 95. In addition, in the present embodiment, the flow sensor S is also electrically connected to the control unit 80. By setting it in this way, the control unit 80 can be used to automatically determine whether sufficient flowing water is introduced into the main input flow path 3M.

[0099] If the electrolytic water generating device 300 of the above-mentioned structure is used, various water can be taken out from the water outlet 5aC. For example, a hydrogen-rich water mode for generating alkaline ion water using hydrogen-rich water, an alkaline ion water mode for generating alkaline ion water using purified water, and a purified water mode for directly taking out purified water can be selected. For example, the selection of such a mode can be made by operating an operating switch provided on the surface of the housing 310 and electrically connected to the control unit 80.

[0100] The following describes the operation of the electrolysis water generating apparatus 300 when each mode is selected.

[0101] First, if Figure 8 As shown, flowing water is introduced into the electrolytic water generating device 300, and the flow sensor S is used to identify the water flow state (initial water flow stage).

[0102] In this embodiment, the flow sensor S is used to identify the water flow state and control is performed so that each component can be driven. Therefore, before the flow sensor S identifies the water flow state, the hydrogen-rich water mode, the alkaline ion water mode, and the purified water mode are not operated. In addition, the selection of each mode can be made in advance before the flow sensor S identifies the water flow state, or after the flow sensor S identifies the water flow state.

[0103] In the initial water flow stage, flowing water is introduced from the water inlet 3aM in a state where the first electrolytic cell 100, the second electrolytic cell 200, the electromagnetic valves 92, 96, the drain valve 94, and the open valve 95 are not driven.

[0104] However, the flow sensor S is driven by the control unit 80. That is, the control unit 80 can determine whether sufficient flowing water is introduced into the main input flow path 3M based on the flow rate detected by the flow sensor S. Figure 1 In FIG. 8 , a dotted line is used to indicate a line connecting each component and the control unit 80, but in FIG. Figure 8 to Figure 17 In FIG. 8 , a line connecting a driven member and the control unit 80 is indicated by a solid line. That is, a member driven in each mode is connected to the control unit 80 by a solid line.

[0105] Here, as a method for identifying the water flow state based on the flow sensor S, for example, the following method can be used: when the flow sensor S detects a flow rate greater than a preset flow rate, it is determined that the water flow state is identified by the flow sensor S. At this time, it is preferred that a flow rate greater than the degree that enables the flow path switching valve 90 to overcome the force of the force member 91 and move downward to block the reverse washing drainage flow path 7 is set to a preset flow rate. The reason is that if it is set in this way, the flow path on the side of the water spray port 5aC becomes an open flow path, and water can be passed into the flow path on the side of the water spray port 5aC. In addition, the method for identifying the water flow state based on the flow sensor S is not limited to the above method, and various methods can be used.

[0106] In addition, during the initial water flow stage, Figure 8 As shown, the drain valve 94 disposed on the downstream side of both the first anode chamber 10A and the second anode chamber 20A is closed. Therefore, it is possible to suppress water from flowing from the branch portion B2 that branches the main input flow path 3M into the cathode side input flow path 3C and the anode side input flow path 3A to the anode side input flow path 3A (the first anode chamber 10A side).

[0107] Therefore, the flowing water introduced from the water inlet 3aM mainly passes through the main input flow path 3M, the cathode side input flow path 3C, the first cathode chamber 10C, the cathode side switching flow path 4C, the second cathode chamber 20C and the cathode side water spraying flow path 5C in sequence. Then, the flowing water is sprayed to the outside from the water spraying port 5aC connected to the cathode side water spraying flow path 5C. At this time, the first electrolytic cell 100 and the second electrolytic cell 200 are not driven, so the purified water filtered by the filter unit F is sprayed to the outside from the water spraying port 5aC.

[0108] Next, use Fig. 9 The operation of the electrolytic water generating device 300 when the hydrogen-rich water mode is selected will be described.

[0109] When the hydrogen-rich water mode is selected, after the flow sensor S recognizes the water flow state, the control unit 80 drives the drain valve 94. As a result, the anode-side drain flow path 5A is opened, and the flow path on the drain port 5aA side also becomes an open flow path, and water can also flow into the flow path on the drain port 5aA side.

[0110] When the hydrogen-rich water mode is selected, the control unit 80 performs control to apply a DC voltage between the first cathode 1C and the first anode 1A, and to apply a DC voltage between the second cathode 2C and the second anode 2A.

[0111] Therefore, in the flow path on the water spray port 5aC side, the flowing water passes through the main input flow path 3M, the cathode side input flow path 3C, the first cathode chamber 10C, the cathode side switching flow path 4C, the second cathode chamber 20C and the cathode side water spray flow path 5C in sequence.

[0112] On the other hand, in the flow path on the drain port 5aA side, flowing water sequentially passes through the main input flow path 3M, the anode side input flow path 3A, the first anode chamber 10A, the anode side switching flow path 4A, the second anode chamber 20A and the anode side drain flow path 5A.

[0113] In this way, when the hydrogen-rich water mode is selected, flowing water passes through the first electrolytic cell 100 and the second electrolytic cell 200 driven by the control unit 80 .

[0114] Therefore, in the flow path on the water discharge port 5aC side, the electrolytic hydrogen-rich water produced in the first cathode chamber 10C is electrolytically processed in the second cathode chamber 20C, thereby producing alkaline ionized water having a relatively high dissolved hydrogen content and a relatively high pH value.

[0115] On the other hand, in the flow path on the drainage port 5aA side, the flowing water is electrolytically treated while passing through both the first anode chamber 10A and the second anode chamber 20A, thereby generating acidic water containing oxygen and having a low pH value.

[0116] In addition, alkaline ionized water is electrolyzed water with a pH of about 9 to 10. Generally speaking, when used as drinking water, alkaline ionized water can improve unexplained clinical complaints of the abdomen such as indigestion, hyperacidity, abnormal intestinal fermentation, and abnormal bowel movements such as chronic diarrhea or constipation.

[0117] In addition, alkaline ionized water is also known as delicious water. The drinking range of alkaline ionized water is approximately the above-mentioned pH range of 9 to 10, and strongly alkaline electrolyzed water with a pH greater than 10 is not suitable for direct drinking water. In this embodiment, the assumed pH range of alkaline ionized water is 9 to 10. However, the assumed pH range of alkaline ionized water is not limited to 9 to 10, but is determined according to the purpose of the alkaline ionized water.

[0118] On the other hand, the electrolyzed oxygen-rich water that has passed through both the first anode chamber 10A and the second anode chamber 20A contains hydrogen ions in addition to oxygen, and is therefore acidic. The electrolyzed water with a pH of 4 to 6 flowing out of the anode-side drainage flow path 5A is generally referred to as acidic water. Acidic water is not used as drinking water, but is used as astringent water for tightening the skin or industrial water, or is not used and is discarded.

[0119] Furthermore, in the present embodiment, the control unit 80 can change the value of the first direct current flowing between the first cathode 1C and the first anode 1A and the value of the second direct current flowing between the second cathode 2C and the second anode 2A. Here, the value of the first direct current corresponds to the pH value of the flowing water in the first cathode chamber 10C. In addition, the value of the second direct current corresponds to the pH value of the flowing water in the second cathode chamber 20C. Therefore, the control unit 80 can adjust the increase or decrease of the hydrogen dissolution amount and the pH value of the alkaline ion water flowing out of the cathode side water spraying flow path 5C by respectively changing the value of the first direct current and the value of the second direct current.

[0120] In addition, according to the electrolytic water generating device 300 of this embodiment, the amount of hydroxide ions generated in the first cathode chamber 10C having the cation exchange membrane 10 varies according to the amount of other cations contained in the flowing water. Therefore, the pH value of the alkaline ionized water obtained from the electrolytic water generating device 300 fluctuates within a certain range.

[0121] However, in general, the amount of other cations contained in the raw water varies only within a limited narrow range in each area where the electrolytic water generating device 300 is used. Therefore, in order to obtain alkaline ionized water having a pH value within the desired range, the value of the first direct current and the value of the second direct current are set in advance. As a result, the pH value of the alkaline ionized water flowing out of the electrolytic water generating device 300 hardly deviates from the assumed range to a large extent.

[0122] Next, use Fig.10 The operation of the electrolytic water generating device 300 when the alkaline ion water mode is selected will be described.

[0123] When the alkaline ion water mode is selected, after the water flow state is recognized by the flow sensor S, the control unit 80 controls the driving of the electromagnetic valves 92, 96 and the drain valve 94. Thus, the closed electromagnetic valve 92 is used to restrict the flow of flowing water from the main trunk input flow path 3M to the branch portion B2 side. On the other hand, by driving the electromagnetic valve 96, the flow path from the main trunk bypass flow path 6M to the branch portion B5 is opened.

[0124] Furthermore, by driving the drain valve 94, the anode-side drain flow path 5A is opened, and the flow path on the drain port 5aA side also becomes an open flow path, and water can also flow into the flow path on the drain port 5aA side.

[0125] When the alkaline ionized water mode is selected, the control unit 80 performs control such that a DC voltage is not applied between the first cathode 1C and the first anode 1A and a DC voltage is applied only between the second cathode 2C and the second anode 2A.

[0126] Then, in the flow path on the water spray port 5aC side, flowing water sequentially passes through the main input flow path 3M, the branch portion B1, the main bypass flow path 6M, the cathode side bypass flow path 6C, the second cathode chamber 20C and the cathode side water spray flow path 5C.

[0127] On the other hand, in the flow path on the drain port 5aA side, flowing water sequentially passes through the trunk input flow path 3M, the branch portion B1, the trunk bypass flow path 6M, the anode side bypass flow path 6A, the second anode chamber 20A, and the anode side drain flow path 5A.

[0128] Thus, when the alkaline ion water mode is selected, the flowing water passes through the second electrolytic cell 200 driven by the control unit 80. At this time, the flowing water introduced into the second electrolytic cell 200 passes through the bypass flow path 6 without passing through the first electrolytic cell 100.

[0129] Therefore, in the flow path on the water spray port 5aC side, the flowing water that has passed through the cathode side bypass flow path 6C is electrolyzed in the second cathode chamber 20C. Therefore, compared with the case where the hydrogen-rich water mode is selected, alkaline ionized water with a relatively low amount of dissolved hydrogen and a relatively low pH value is generated. In other words, when the alkaline ionized water mode is selected, the flowing water flowing out of the cathode side water spray flow path 5C becomes alkaline ionized water with a relatively low hydrogen concentration and pH value, which is not increased by the first electrolytic cell 100.

[0130] On the other hand, in the flow path on the side of the water discharge port 5aA, the flowing water having passed through the anode-side bypass flow path 6A is electrolytically treated in the second anode chamber 20A to generate acidic water.

[0131] Next, use Fig.11 The operation of the electrolytic water generating device 300 when purified water is selected will be described.

[0132] When the purified water mode is selected, after the water flow state is recognized by the flow sensor S, the control unit 80 performs control to drive the electromagnetic valves 92 and 96. As a result, the introduction of flowing water from the main input flow path 3M to the branch portion B2 side is restricted by the closed electromagnetic valve 92. On the other hand, by driving the electromagnetic valve 96, the flow path from the main bypass flow path 6M to the branch portion B5 is opened.

[0133] Here, when the purified water mode is selected, the drain valve 94 is not driven, and therefore the anode-side drain flow path 5A is kept in a closed state.

[0134] When the water purification mode is selected, the first electrolytic cell 100 and the second electrolytic cell 200 are not driven. That is, the control unit 80 performs control such that a DC voltage is not applied between the first cathode 1C and the first anode 1A, and a DC voltage is not applied between the second cathode 2C and the second anode 2A.

[0135] Then, in the flow path on the water spray port 5aC side, flowing water sequentially passes through the main input flow path 3M, the branch portion B1, the main bypass flow path 6M, the cathode side bypass flow path 6C, the second cathode chamber 20C and the cathode side water spray flow path 5C.

[0136] On the other hand, in the flow path on the drain port 5aA side, the drain valve 94 is closed, so that water is prevented from flowing from the branch portion B5 that branches the main bypass flow path 6M into the cathode bypass flow path 6C and the anode bypass flow path 6A to the anode bypass flow path 6A (the second anode chamber 20A side).

[0137] As described above, when the purified water mode is selected, the flowing water mainly passes through the second cathode chamber 20C of the second electrolytic cell 200 via the cathode-side bypass flow path 6C without passing through the first electrolytic cell 100 .

[0138] At this time, the second electrolytic cell 200 is not driven, and therefore, in the flow path on the water spout 5aC side, the flowing water is not processed in any way in the second electrolytic cell 200 and is ejected from the water spout 5aC in a state of purified water.

[0139] With the above structure, when purified water is obtained from the electrolytic water generating device 300, the flowing water does not pass through the first cathode chamber 10C and the first anode chamber 10A of the first electrolytic cell 100 without applying a DC voltage between the first cathode 1C and the first anode 1A. Therefore, it is possible to suppress the accumulation of other cations on the cation exchange membrane 10. As a result, when alkaline ionized water is obtained from the electrolytic water generating device 300, it is possible to suppress the pH of the flowing water in the first cathode chamber 10C from rising to an unexpected value due to the accumulation of a large amount of other cations in the cation exchange membrane 10. Therefore, it is possible to suppress the pH of the alkaline ionized water flowing out from the cathode side water spraying channel 5C from becoming higher than the value within the expected range.

[0140] Next, use Figure 12 to Figure 17 A method for cleaning the electrolyzed water generating device 300 will be described.

[0141] In the electrolytic water generating device 300 of the present embodiment, when water is stored in the electrolytic cells (the first electrolytic cell 100 and the second electrolytic cell 200), a voltage can be applied to the electrodes with a polarity opposite to that during electrolysis, that is, so-called reverse cleaning can be performed. If such reverse cleaning is performed, the performance of the electrodes arranged in the electrolytic cells can be maintained.

[0142] In the present embodiment, the method for cleaning the electrolysis water generating apparatus includes a reverse cleaning step of performing reverse cleaning of the first electrolytic cell 100 after performing reverse cleaning of the second electrolytic cell 200 .

[0143] Specifically, in a state where water is stored in the electrolytic tanks (the first electrolytic tank 100 and the second electrolytic tank 200), Fig.12 As shown, first, the second electrolytic tank 200 is backwashed. Then, after the second electrolytic tank 200 is backwashed, Fig.13 As shown, the first electrolytic cell 100 is backwashed.

[0144] In addition, in this embodiment, if Fig.14 As shown, the reverse cleaning process includes a drainage process, which is performed after the reverse cleaning of the second electrolytic cell 200 and the first electrolytic cell 100 is performed. In this drainage process, water in the flow path is drained.

[0145] Furthermore, in the present embodiment, the reverse cleaning process includes a storage process, which is performed after the reverse cleaning of the first electrolytic cell 100 is performed. In the storage process, the water inside the first electrolytic cell 100 is stored for a certain period of time. In the present embodiment, the distance between the electrodes of the first electrolytic cell 100 is small, and the pH of the water inside the first electrolytic cell 100 is difficult to decrease. Therefore, in the present embodiment, in order to more reliably decrease the pH of the water inside the first electrolytic cell 100, the water inside the first electrolytic cell 100 is stored for a certain period of time. The storage time of the water inside the first electrolytic cell 100 can be appropriately set according to the distance between the electrodes of the first electrolytic cell 100, etc.

[0146] Thus, in this embodiment, first, the second electrolytic cell 200 is backwashed, and then the first electrolytic cell 100 is backwashed, water inside the first electrolytic cell 100 is stored for a certain period of time, and then the water in the flow path is discharged, thereby performing the backwashing process.

[0147] Next, use Figure 12 to Figure 14 The operation of the electrolysis water generating device 300 in each step will be described.

[0148] When the backwashing process is performed, water is first introduced into the flow path to form a state where water is stored in the electrolytic cells (the first electrolytic cell 100 and the second electrolytic cell 200).

[0149] Then, after water is stored in the electrolytic cells (the first electrolytic cell 100 and the second electrolytic cell 200), Fig.12 As shown, the control unit 80 performs control to drive the electromagnetic valve 92. As a result, the main input flow path 3M is closed by the electromagnetic valve 92.

[0150] In addition, if Fig.12 As shown, the electromagnetic valve 96 and the drain valve 94 are not driven, so the trunk bypass flow path 6M is also closed by the electromagnetic valve 96 and the anode side drain flow path 5A is also closed by the drain valve 94.

[0151] In addition, in the Figure 12 to Figure 14 In the reverse cleaning process shown, water is not supplied from the water inlet 3aM. Therefore, the flow path in the device is switched to the second mode by the flow path switching valve 90.

[0152] In addition, Figure 12 to Figure 14 In the backwashing step shown, the second anode chamber 20A is communicated with the anode-side drain flow path 5A and the backwashing drain flow path 7, respectively.

[0153] Then, the control unit 80 performs control to apply a DC voltage with a polarity opposite to that during normal electrolysis between the second cathode 2C and the second anode 2A.

[0154] By setting it in this way, the second electrolytic cell 200 is backwashed. At this time, O2 is generated in the second cathode chamber 20C to generate acidic water. On the other hand, H2 is generated in the second anode chamber 20A to generate alkaline ion water.

[0155] Furthermore, when the second electrolytic cell 200 is backwashed, as described above, the second anode chamber 20A is connected to the anode side drainage flow path 5A and the backwash drainage flow path 7, respectively. Therefore, the H2 generated in the second anode chamber 20A is introduced from the second anode chamber 20A into the backwash drainage flow path 7 through the anode side drainage flow path 5A. Then, under the action of the H2 introduced into the backwash drainage flow path 7, the flow path switching valve 90 is pushed upward. Here, in the amount of gas generated when the second electrolytic cell 200 is backwashed, H2 is greater than O2. Therefore, when the second electrolytic cell 200 is backwashed, under the action of the force of the force member 91 and the gas pressure of the generated H2, the flow path switching valve 90 is efficiently pushed upward.

[0156] On the other hand, the O2 generated in the second cathode chamber 20C pushes the acidic water generated in the second cathode chamber 20C toward the cathode-side water spraying flow path 5C. However, when the second electrolytic cell 200 is backwashed, as described above, the main input flow path 3M is closed by the electromagnetic valve 92, the main bypass flow path 6M is closed by the electromagnetic valve 96, and the anode-side drain flow path 5A is closed by the drain valve 94. Therefore, the acidic water generated in the second cathode chamber 20C drips from the water spraying port 5aC.

[0157] Furthermore, after the reverse cleaning of the second electrolytic cell 200 is completed, Fig.13As shown, a control is performed to apply a DC voltage between the first cathode 1C and the first anode 1A with a polarity opposite to that during normal electrolysis. By setting in this way, the first electrolytic tank 100 is reversely cleaned.

[0158] Furthermore, when the first electrolytic cell 100 is backwashed, the control unit 80 also performs control to drive the electromagnetic valve 92. Therefore, the main input flow path 3M is closed by the electromagnetic valve 92.

[0159] In addition, since the electromagnetic valve 96 and the drain valve 94 are not driven, the trunk bypass flow path 6M is also closed by the electromagnetic valve 96 , and the anode-side drain flow path 5A is also closed by the drain valve 94 .

[0160] When the first electrolytic cell 100 is backwashed, O 2 is generated in the first cathode chamber 10C to produce acidic water, while H 2 is generated in the first anode chamber 10A to produce alkaline ionized water.

[0161] Furthermore, the H2 generated in the first anode chamber 10A is introduced from the first anode chamber 10A into the second anode chamber 20A through the anode side switching flow path 4A. Thereafter, the H2 is introduced from the second anode chamber 20A into the reverse cleaning drainage flow path 7 through the anode side drainage flow path 5A. Then, under the action of the H2 introduced into the reverse cleaning drainage flow path 7, the flow path switching valve 90 is pushed upward. Here, in the amount of gas generated when the first electrolytic cell 200 is reversely cleaned, H2 is greater than O2. Therefore, when the first electrolytic cell 100 is reversely cleaned, the flow path switching valve 90 is efficiently pushed upward under the action of the force of the force member 91 and the gas pressure of the relatively large amount of H2 generated.

[0162] On the other hand, O2 generated in the first cathode chamber 10C is introduced from the first cathode chamber 10C to the second cathode chamber 20C through the cathode side transfer flow path 4C. Thereafter, the O2 pushes the acidic water generated in the second cathode chamber 20C to the cathode side water spray flow path 5C when the second electrolytic cell 200 is backwashed. However, when the first electrolytic cell 100 is backwashed, as described above, the main input flow path 3M is closed by the electromagnetic valve 92, the main bypass flow path 6M is closed by the electromagnetic valve 96, and the anode side drainage flow path 5A is closed by the drainage valve 94. Therefore, the acidic water generated in the second cathode chamber 20C drips from the water spray port 5aC.

[0163] Furthermore, after the backwashing of the first electrolytic tank 100 is completed, the water in the first electrolytic tank 100 is stored for a certain period of time in order to more reliably lower the pH of the water in the first electrolytic tank 100 .

[0164] Furthermore, after the water in the first electrolytic cell 100 is stored for a certain period of time, Fig.14As shown, the control unit 80 performs control to drive the drain valve 94 and the open valve 95. As a result, the anode-side drain flow path 5A is opened, and the open valve 95 is also opened.

[0165] Then, air is introduced into the flow path from the opened release valve 95, and the water in the flow path is pushed out from the water discharge port 5aA to the outside due to the pressure of the introduced air.

[0166] At this time, the water in the second cathode chamber 20C passes through the cathode side switching flow path 4C, the first cathode chamber 10C, the main input flow path 3M, the reverse washing drainage flow path 7 and the anode side drainage flow path 5A in sequence, and then is sprayed to the outside from the water spray port 5aC connected to the cathode side water spray flow path 5C.

[0167] As described above, in the electrolysis water generating device 300 of the present embodiment, it is possible to more reliably discharge the water stored in the device after the backwashing.

[0168] In addition, the acidic water generated during the reverse washing can be discharged through a different path from the water spout 5aC side. As a result, it is possible to minimize the spraying of acidic water that is not suitable for drinking from the water spout 5aC.

[0169] In addition, when the first electrolytic tank 100 and the second electrolytic tank 200 are backwashed, it is also conceivable that Fig.15 As shown, first, the first electrolytic cell 100 is backwashed, and then, as shown in Fig.16 As shown, the second electrolytic cell 200 is backwashed.

[0170] In addition, when the first electrolytic cell 100 is reversely cleaned first and then the second electrolytic cell 200 is reversely cleaned, the control of each electrolytic cell during reverse cleaning is the same as the control of each electrolytic cell during reverse cleaning when the second electrolytic cell 200 is reversely cleaned first. Fig.16 When the second electrolytic cell 200 is reversely cleaned, Fig.12 The same control is performed during the reverse cleaning of the second electrolytic cell 200 shown in FIG. Fig.15 When the first electrolytic cell 100 is backwashed, Fig.13 The control during the backwashing of the first electrolytic cell 100 shown is the same control.

[0171] However, if Fig.15As shown, when the first electrolytic cell 100 is backwashed first, the O2 generated in the first cathode chamber 10C is introduced from the first cathode chamber 10C to the second cathode chamber 20C through the cathode side switching flow path 4C, and the water in the second cathode chamber 20C is pushed out to the cathode side water spray flow path 5C. At this time, the second electrolytic cell 200 is not backwashed, so there is a case where the water in the second cathode chamber 20C becomes alkaline ion water.

[0172] Therefore, when the first electrolytic cell 100 is backwashed first, the alkaline ion water in the second cathode chamber 20C may drip from the water spray port 5aC. Furthermore, when the alkaline ion water in the second cathode chamber 20C drips from the water spray port 5aC, scale may adhere to the cathode side water spray flow path 5C and the water spray port 5aC.

[0173] On the other hand, when the second electrolytic cell 200 is backwashed first, the acidic water generated in the second cathode chamber 20C can be dripped from the water spraying port 5aC as described above. Therefore, it is possible to more reliably suppress the adhesion of scale to the cathode side water spraying flow path 5C and the water spraying port 5aC.

[0174] In addition, when the first electrolytic cell 100 is reversely cleaned first, the water in the second cathode chamber 20C is pushed out, so the amount of water remaining in the second cathode chamber 20C decreases when the second electrolytic cell 200 is reversely cleaned. As a result, when the second electrolytic cell 200 is reversely cleaned, the amount of acidic water dripping from the water spray port 5aC decreases, making it difficult to suppress the adhesion of scale.

[0175] In contrast, when the second electrolytic cell 200 is backwashed first, not only is the amount of water in the second cathode chamber 20C large, but the water in the first cathode chamber 10C is not pushed out during the backwashing of the second electrolytic cell 200. Therefore, in any electrolytic cell, backwashing can be performed while a sufficient amount of water is stored.

[0176] In addition, Figure 12 to Figure 14 In the reverse cleaning process shown, the case where the anode side drainage flow path 5A is closed by the drainage valve 94 when the reverse cleaning of the first electrolytic cell 100 and the second electrolytic cell 200 is performed is illustrated. However, when the reverse cleaning of the first electrolytic cell 100 and the second electrolytic cell 200 is performed, it is not necessary to close the anode side drainage flow path 5A by the drainage valve 94, and the anode side drainage flow path 5A may be opened at least temporarily when the reverse cleaning of the first electrolytic cell 100 and the second electrolytic cell 200 is performed. That is, the drainage valve 94 may be opened during the reverse cleaning process. If so, the amount of acidic water dripping from the water spray port 5aC can be reduced, for example, when the water spray port 5aC is not facing the water tank portion Ka, the acidic water can be suppressed from falling on the floor.

[0177] In addition, if Fig.17 As shown, the first electrolytic cell 100 and the second electrolytic cell 200 can also be backwashed in the water-flowing state.

[0178] Specifically, the control unit 80 executes control to drive the drain valve 94. As a result, the anode-side drain flow path 5A is opened, and the flow path on the drain port 5aA side also becomes an open flow path, allowing water to flow into the flow path on the drain port 5aA side.

[0179] The control unit 80 also controls to apply a DC voltage with a polarity opposite to that during normal electrolysis between the first cathode 1C and the first anode 1A, and to apply a DC voltage with a polarity opposite to that during normal electrolysis between the second cathode 2C and the second anode 2A.

[0180] Therefore, in the flow path on the water spray port 5aC side, the flowing water passes through the main input flow path 3M, the cathode side input flow path 3C, the first cathode chamber 10C, the cathode side switching flow path 4C, the second cathode chamber 20C and the cathode side water spray flow path 5C in sequence.

[0181] On the other hand, in the flow path on the drain port 5aA side, flowing water sequentially passes through the main input flow path 3M, the anode side input flow path 3A, the first anode chamber 10A, the anode side switching flow path 4A, the second anode chamber 20A and the anode side drain flow path 5A.

[0182] So, in Fig.17 In the reverse cleaning method shown, flowing water passes through the first electrolytic cell 100 and the second electrolytic cell 200 driven by the control unit 80 with a polarity opposite to that during normal electrolysis.

[0183] Therefore, the acidic water generated in the first cathode chamber 10C and the second cathode chamber 20C is ejected from the water ejection port 5aC, and the alkaline ion water generated in the first anode chamber 10A and the second anode chamber 20A is ejected from the water discharge port 5aA.

[0184] [Function, Effect]

[0185] Hereinafter, the characteristic structures of the electrolysis water generating device and the method for cleaning the electrolysis water generating device shown in the above-mentioned embodiment and the effects obtained thereby will be described.

[0186] (1) The electrolytic water generating device shown in the above embodiment comprises: a first electrolytic cell, the first electrolytic cell comprising a first cathode chamber, a first anode chamber and a cation exchange membrane, the cation exchange membrane separating the first cathode chamber from the first anode chamber; and a second electrolytic cell, the second electrolytic cell comprising a second cathode chamber, a second anode chamber and a neutral diaphragm, the neutral diaphragm separating the second cathode chamber from the second anode chamber, inhibiting the passage of molecules, but allowing cations and anions to pass. The electrolytic water generating device also comprises: a water inlet; a main input flow path connected to the water inlet; a cathode side input flow path branched from the main input flow path and connected to the inlet of the first cathode chamber; an anode side input flow path branched from the main input flow path and connected to the inlet of the first anode chamber; a cathode side switching flow path connected to the outlet of the first cathode chamber and the inlet of the second cathode chamber; and an anode side switching flow path connected to the outlet of the first anode chamber and the inlet of the second anode chamber. The electrolytic water generating device also includes: a cathode side water spraying flow path connected to the outlet of the second cathode chamber; an anode side drainage flow path connected to the outlet of the second anode chamber; a water spray port connected to the cathode side water spraying flow path; and a drainage port connected to the anode side drainage flow path. The electrolytic water generating device also includes: a trunk bypass flow path branched from the trunk input flow path; a cathode side bypass flow path branched from the trunk bypass flow path and connected to the cathode side switching flow path; and an anode side bypass flow path branched from the trunk bypass flow path and connected to the anode side switching flow path. The electrolytic water generating device also includes: a flow path switching valve arranged at a branching portion between the trunk input flow path and the trunk bypass flow path; a reverse cleaning drainage flow path connected to the branching portion and the anode side drainage flow path; and a drainage valve arranged at a portion between the branching portion between the anode side drainage flow path and the reverse cleaning drainage flow path and the drainage port. Furthermore, the flow path switching valve is configured to be switchable between a first mode and a second mode, wherein in the first mode, the water inlet can be connected to the main input flow path, and the water inlet can be connected to the main bypass flow path, and in the second mode, the drain port can be connected to the main input flow path, and the drain port can be connected to the main bypass flow path.

[0187] If so configured, after backwashing, the flow path switching valve can be switched so that the flow path becomes the second mode and the drain valve is opened. Furthermore, by switching the flow path switching valve so that the flow path becomes the second mode and opening the drain valve, the water inside the first cathode chamber and the water inside the second cathode chamber can be discharged from the drain port.

[0188] In this manner, according to the electrolysis water generating device described in the above embodiment, it is possible to more reliably discharge the water stored in the device after backwashing.

[0189] (2) In the electrolysis water generating device of (1) above, preferably, the flow path switching valve is biased by a biasing member so that the flow path switching valve is in the second mode when water is not supplied from the water inlet and in the first mode when water is supplied from the water inlet.

[0190] According to this configuration, not only can the structure be further simplified, but also the first mode and the second mode can be easily switched depending on whether water is supplied from the water inlet.

[0191] (3) In the electrolysis water generating device of (1) or (2) above, preferably, electromagnetic valves are disposed in the main input flow path and the main bypass flow path, respectively. Preferably, at least one of the electromagnetic valves is opened in the first mode.

[0192] If so, when water is supplied from the water inlet, the water pressure will not act on the first electrolytic cell or the second electrolytic cell which is also a pressure vessel on the downstream side, so the burden on each electrolytic cell can be reduced. In addition, when a flow sensor is configured, the flow sensor can be used to more reliably detect the supply of water, and control such as automatically turning on the power supply to the electrolytic water generating device in conjunction with this can be performed.

[0193] (4) In the electrolysis water generating device according to any one of (1) to (3) above, it is preferable that an opening valve is disposed at a position higher than the drain port in the cathode-side spray water flow path.

[0194] According to this configuration, regardless of the positional relationship between the water spray port and the water discharge port, when the open valve is opened during water discharge after reverse washing, the washing water can be more reliably discharged from the open valve toward the discharge port.

[0195] (5) In the electrolysis water generating device according to any one of (1) to (4) above, activated carbon is preferably disposed in the anode-side switching flow path.

[0196] If so, the hypochlorous acid generated in the first anode chamber can be adsorbed on the activated carbon arranged in the anode side switching flow path and removed, and the second anode chamber can be protected. In particular, when the first electrolytic cell produces hydrogen-rich water, nearly 10 times the amount of hypochlorous acid is produced compared to simple electrolysis, so it is preferred to arrange activated carbon in the anode side switching flow path.

[0197] (6) In the electrolytic water generating device according to any one of (1) to (5) above, preferably, a space for storing water is provided at an upper portion of the first electrolytic cell.

[0198] With this arrangement, even if a gaseous component is generated during backwashing, water accumulated in the space can be supplied to the space where the electrodes (first cathode, first anode) are located, thereby more reliably suppressing the obstruction of electrolysis during electrolysis treatment.

[0199] (7) In addition, it is preferred that the method for cleaning the electrolytic water generating device according to any one of (1) to (6) above includes a reverse cleaning step in which the first electrolytic cell is reversely cleaned after the second electrolytic cell is reversely cleaned.

[0200] If it is arranged in this way, the water inside the second electrolytic cell will not be pushed out by the generated gas phase component as when the first electrolytic cell is first backwashed. In addition, there is a case where the water inside the second cathode chamber before backwashing is alkaline, and when the alkaline water flows to the water outlet, it is possible to cause scale. However, when the second electrolytic cell is first backwashed, the water inside the second cathode chamber becomes acidic. Therefore, even if the water inside the second cathode chamber flows to the water outlet due to the gas phase from the first electrolytic cell, the generation of scale can be suppressed because the water flowing is acidic.

[0201] (8) In the method for cleaning the electrolytic water generating device of (7) above, preferably, the reverse cleaning step includes a storage step, which is performed after the reverse cleaning of the first electrolytic cell, and in which the water inside the first electrolytic cell is stored for a certain period of time.

[0202] In this way, if the water in the first electrolytic tank is stored for a certain period of time after the reverse cleaning of the first electrolytic tank is performed, it is possible to more reliably suppress the adhesion of scale around the electrodes.

[0203] (9) In the method for cleaning an electrolytic water generating device according to (7) or (8) above, it is preferred that, during the reverse cleaning step, the second anode chamber is connected to the anode side drainage flow path and the reverse cleaning drainage flow path.

[0204] According to this configuration, the gas phase component generated in the second anode chamber can be used to assist the biasing force for obtaining the second mode of the flow path switching valve.

[0205] (10) In the method for cleaning an electrolytic water generating apparatus according to any one of (7) to (9) above, it is preferred that the drain valve is opened in the reverse cleaning step.

[0206] If so, a part of the reverse electrolytic water (acidic water) can be discharged from the drainage side, so the amount of reverse electrolytic water (acidic water) dripping from the water spray side due to the gas phase components generated during reverse cleaning can be reduced. In addition, when the cleaning water is too concentrated, there is a possibility that the electrodes and the like will corrode. Therefore, by discharging a part of the reverse electrolytic water (acidic water) from the drainage side, the time that the electrodes and the like are immersed in the cleaning water can also be reduced.

[0207] [other]

[0208] The contents of the electrolysis water generating device and the method for cleaning the electrolysis water generating device of the present invention have been described above, but it is obvious to those skilled in the art that the present invention is not limited to these descriptions and that various modifications and improvements can be made.

[0209] For example, the specifications (shape, size, layout, etc.) of the casing, flow path, and other minute parts can also be changed appropriately.

Claims

1. An electrolytic water generating device, wherein: The electrolyzed water generating device comprises: A first electrolytic cell, the first electrolytic cell comprising a first cathode chamber, a first anode chamber, and a cation exchange membrane, wherein the cation exchange membrane separates the first cathode chamber from the first anode chamber; A second electrolytic cell, the second electrolytic cell comprising a second cathode chamber, a second anode chamber, and a neutral diaphragm, the neutral diaphragm separating the second cathode chamber from the second anode chamber, inhibiting the passage of molecules but allowing the passage of cations and anions; water inlet; A main input flow path connected to the water inlet; a cathode side input flow path branched from the main input flow path and connected to the inlet of the first cathode chamber; an anode-side input flow path branched from the main input flow path and connected to the inlet of the first anode chamber; A cathode-side switching flow path connected to the outlet of the first cathode chamber and the inlet of the second cathode chamber; an anode-side switching flow path connected to the outlet of the first anode chamber and the inlet of the second anode chamber; a cathode-side water spraying passage connected to the outlet of the second cathode chamber; an anode-side drainage flow path connected to the outlet of the second anode chamber; a water spray port connected to the cathode-side water spray flow path; a drain port connected to the anode-side drain flow path; a main trunk bypass flow path, which branches out from the main trunk input flow path; a cathode side bypass flow path, which branches out from the main bypass flow path and is connected to the cathode side transfer flow path; an anode-side bypass flow path, which branches out from the main bypass flow path and is connected to the anode-side transfer flow path; a flow path switching valve, which is arranged at a branch portion between the main input flow path and the main bypass flow path; a reverse washing drainage flow path connected to the branch portion and the anode-side drainage flow path; as well as a drain valve disposed between a branch portion of the anode-side drain flow path and the reverse-wash drain flow path and the drain port, The flow path switching valve is configured to be switchable between a first mode and a second mode. In the first mode, the water inlet can communicate with the main input flow path, and the water inlet can communicate with the main bypass flow path. In the second mode, the drain port can communicate with the main input flow path, and the drain port can communicate with the main bypass flow path.

2. The electrolyzed water generating device according to claim 1, wherein: The flow path switching valve is biased by a biasing member, thereby being in the second mode when water is not supplied from the water inlet, and being in the first mode when water is supplied from the water inlet.

3. The electrolyzed water generating device according to claim 1 or 2, wherein: Solenoid valves are respectively arranged on the main input flow path and the main bypass flow path. At least in the first mode, any one of the solenoid valves is opened.

4. The electrolyzed water generating device according to claim 1 or 2, wherein: An opening valve is disposed at a position higher than the drain port in the cathode-side spray water flow path.

5. The electrolyzed water generating device according to claim 1 or 2, wherein: Activated carbon is arranged in the anode-side switching flow path.

6. The electrolyzed water generating device according to claim 1 or 2, wherein: A space for storing water is provided at the upper portion of the first electrolytic tank.

7. A method for cleaning an electrolytic water generating device, which is the method for cleaning an electrolytic water generating device according to any one of claims 1 to 6, wherein: The method for cleaning the electrolytic water generating device includes a reverse cleaning step in which the first electrolytic cell is reverse cleaned after the second electrolytic cell is reverse cleaned.

8. The cleaning method of the electrolytic water generating device according to claim 7, wherein: The reverse cleaning step includes a storage step that is performed after the reverse cleaning of the first electrolytic cell is performed. In the storage step, the water in the first electrolytic cell is stored for a certain period of time.

9. The cleaning method of the electrolytic water generating device according to claim 7 or 8, wherein: During the backwashing step, the second anode chamber is communicated with the anode-side drain flow path and the backwashing drain flow path, respectively.

10. The cleaning method of the electrolytic water generating device according to claim 7 or 8, wherein: The drain valve is opened in the reverse cleaning step.

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