WO2022181482A1 - 電気分解装置 - Google Patents
電気分解装置 Download PDFInfo
- Publication number
- WO2022181482A1 WO2022181482A1 PCT/JP2022/006636 JP2022006636W WO2022181482A1 WO 2022181482 A1 WO2022181482 A1 WO 2022181482A1 JP 2022006636 W JP2022006636 W JP 2022006636W WO 2022181482 A1 WO2022181482 A1 WO 2022181482A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- water
- period
- sodium hypochlorite
- upper electrode
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 67
- 239000005708 Sodium hypochlorite Substances 0.000 claims abstract description 66
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 42
- 239000007864 aqueous solution Substances 0.000 claims abstract description 27
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 22
- 239000003792 electrolyte Substances 0.000 claims abstract description 8
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 44
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 43
- 230000008569 process Effects 0.000 description 43
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 30
- 239000000460 chlorine Substances 0.000 description 30
- 229910052801 chlorine Inorganic materials 0.000 description 30
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 23
- 238000002474 experimental method Methods 0.000 description 21
- 230000006870 function Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 17
- 239000007921 spray Substances 0.000 description 13
- 239000011780 sodium chloride Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- -1 Hypochlorite ions Chemical class 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000003002 pH adjusting agent Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000001103 potassium chloride Substances 0.000 description 3
- 235000011164 potassium chloride Nutrition 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000004332 deodorization Methods 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/24—Halogens or compounds thereof
- C25B1/26—Chlorine; Compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
Definitions
- the present invention relates to an electrolyzer.
- Patent Document 1 discloses an electrolytic water sprayer.
- the electrolytic water sprayer of Patent Document 1 generates hypochlorous acid water by electrolysis.
- the electrolytic water sprayer of Patent Document 1 includes a pair of electrodes and a controller.
- the control unit reverses the polarity of power supplied to the pair of electrodes.
- the electrolyzed water sprayer of Patent Document 1 suppresses adhesion of scale components such as calcium hydroxide and calcium carbonate to the surfaces of the electrodes by reversing the polarity of the power supplied to the pair of electrodes.
- the electrolytic water sprayer of Patent Document 1 does not reverse the polarity of the pair of electrodes during the generation of hypochlorous acid water. Therefore, in addition to the period for generating hypochlorous acid water, a period for suppressing the adhesion of scale components to the surface of the electrode is required.
- the present invention has been made in view of the above problems, and an object thereof is to provide an electrolyzer that does not require a dedicated period for suppressing adhesion of scale components to the surfaces of electrodes. .
- the electrolyzer of the present invention produces sodium hypochlorite water or hypochlorous acid water.
- the electrolyzer includes a first electrode, a second electrode, an inverting section, and a control section.
- the second electrode faces the first electrode. Together with the first electrode, the second electrode performs electrolysis using an aqueous solution containing chloride ions as a main electrolyte to generate the sodium hypochlorite water or the hypochlorous acid water.
- the inverting part inverts the polarities of the first electrode and the second electrode.
- the control section controls the inverting section.
- the control unit controls the reversing unit to reverse the polarities of the first electrode and the second electrode during the generation of the sodium hypochlorite water or the hypochlorous acid water.
- FIG. 10 is a sequence diagram showing inversion processing; BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows a part of cross section of the electrolyzer which concerns on Embodiment 1 of this invention.
- FIG. 4 is a plan view showing an upper electrode; FIG.
- FIG. 4 is a plan view showing a lower electrode; It is a top view which shows a lower housing
- FIG. 7 is a sequence diagram showing an example of reversing processing performed by the electrolyzer according to Embodiment 2 of the present invention
- FIG. 11 is a sequence diagram showing an example of a reversing process performed by an electrolyzer according to Embodiment 3 of the present invention
- FIG. 11 is a sequence diagram showing an example of reversing processing executed by the electrolyzer according to Embodiment 4 of the present invention
- It is a figure which shows the experimental result based on the Example of this invention.
- FIG. 1 is a diagram showing the appearance of a spray device 100.
- the spray device 100 sprays sodium hypochlorite water.
- the spray device 100 can be used, for example, for disinfection or deodorization.
- the spray device 100 includes an electrolyzer 200 and a spray device 400.
- the electrolyzer 200 produces sodium hypochlorite water by electrolysis.
- Spray device 400 has trigger 401 .
- Spray device 400 sprays sodium hypochlorite water in response to a user operating trigger 401 .
- the electrolyzer 200 electrolyzes to generate sodium hypochlorite water having a desired effective chlorine concentration.
- the desired available chlorine concentration is 600 ppm or higher.
- the desired effective chlorine concentration is not limited to 600 ppm or more.
- the desired available chlorine concentration may be, for example, 500 ppm or higher.
- sodium hypochlorite water having a desired effective chlorine concentration may be simply referred to as "sodium hypochlorite water”.
- the production of sodium hypochlorite water having a desired effective chlorine concentration by electrolysis may be described as "production of sodium hypochlorite water”.
- the electrolyzer 200 includes a container section 210 , a lower housing 230 and an operation section 250 .
- the spray device 400 is detachably connected to the top of the container part 210 .
- the container part 210 is coupled to the upper part of the lower housing 230 .
- the container part 210 protrudes upward from the lower housing 230 .
- the operation unit 250 is arranged on the surface of the lower housing 230 .
- the container part 210 accommodates an aqueous solution containing chloride ions before executing the sodium hypochlorite water generation process.
- an aqueous solution containing chloride ions may be referred to as "chloride ion-containing water".
- Chloride ion-containing water is, for example, sodium chloride aqueous solution.
- the user removes the spray device 400 from the container unit 210 and puts a predetermined amount of tap water and a predetermined amount of salt into the container unit 210 before executing the sodium hypochlorite water generation process. By doing so, the sodium chloride aqueous solution is accommodated in the container part 210 .
- the chloride ion-containing water is not limited to the sodium chloride aqueous solution.
- the chloride ion-containing water may be an aqueous solution capable of generating sodium hypochlorite water.
- the chloride ion-containing water may be an aqueous potassium chloride solution, hydrochloric acid, or an aqueous solution obtained by mixing all or part of an aqueous sodium chloride solution, an aqueous potassium chloride solution, and hydrochloric acid. Any additive such as a pH adjuster may be added to the chloride ion-containing water.
- the electrolyzer 200 generates sodium hypochlorite water in the container part 210 by performing electrolysis using chloride ion-containing water as the main electrolyte.
- chloride ion-containing water is an aqueous sodium chloride solution
- the main electrolyte is specifically sodium chloride (eg, salt).
- the container part 210 contains sodium hypochlorite water.
- Sodium hypochlorite water is an aqueous solution in which sodium hypochlorite is dissolved in chloride ion-containing water. Hypochlorite ions and sodium ions are dispersed in sodium hypochlorite water. Some hypochlorous acid ions (ClO ⁇ ) may be converted into hypochlorous acid (HClO) and exist in the aqueous solution depending on the pH of the aqueous solution after the electrolysis treatment.
- the operation unit 250 is operated by the user.
- the operation unit 250 is, for example, a capacitive touch sensor.
- the operation unit 250 is not particularly limited as long as it is operated by the user.
- the operation unit 250 may be a push-type switch.
- the electrolyzer 200 executes the sodium hypochlorite water generation process. Specifically, the electrolyzer 200 performs electrolysis for a certain period of time. As a result, sodium hypochlorite water having the desired effective chlorine concentration is produced.
- FIG. 2 is a diagram showing a part of the electrolyzer 200 of this embodiment.
- the electrolyzer 200 further comprises an upper electrode 2 and a lower electrode 4 .
- the lower housing 230 has a liquid containing portion 240 .
- the liquid storage part 240 is formed in the upper part of the lower housing 230 .
- the upper surface of the lower housing 230 is open, and the liquid containing portion 240 communicates with the inner space of the container portion 210 . Therefore, the liquid containing portion 240 contains the chloride ion-containing water before the sodium hypochlorite water generation process is executed.
- the sodium hypochlorite water is stored in the liquid storage unit 240 after execution of the sodium hypochlorite water generation process (after the electrolysis process for a certain period of time).
- the upper electrode 2 and the lower electrode 4 are arranged inside the liquid container 240 . Therefore, the upper electrode 2 and the lower electrode 4 are immersed in chloride ion-containing water before performing the sodium hypochlorite water generation process.
- the upper electrode 2 and the lower electrode 4 face each other. Specifically, the upper electrode 2 and the lower electrode 4 face each other vertically with a predetermined gap therebetween.
- the upper electrode 2 is arranged above the lower electrode 4 . Voltages having different polarities are applied to the upper electrode 2 and the lower electrode 4 . As a result, the upper electrode 2 and the lower electrode 4 perform electrolysis using the chloride ion-containing water as the main electrolyte to generate sodium hypochlorite water.
- the upper electrode 2 and the lower electrode 4 have the same catalytic component.
- the upper electrode 2 and the lower electrode 4 have oxides of noble metals such as iridium or ruthenium as catalytic components.
- the upper electrode 2 and lower electrode 4 may have a metal such as titanium or platinum as a catalytic component.
- the upper electrode 2 and the lower electrode 4 may have a composite material of noble metal oxide such as iridium or ruthenium and metal such as titanium or platinum as a catalyst component.
- the upper electrode 2 and the lower electrode 4 have approximately the same surface area.
- the electrolyzer 200 inverts the polarities of the upper electrode 2 and the lower electrode 4 once during the sodium hypochlorite aqueous production process. Specifically, the electrolyzer 200 inverts the polarity of the voltage applied to the upper electrode 2 and the lower electrode 4 once during the sodium hypochlorite aqueous production process.
- By inverting the polarities of the upper electrode 2 and the lower electrode 4 once it is possible to suppress adhesion of scale components such as calcium hydroxide and calcium carbonate to the surfaces of the upper electrode 2 and the lower electrode 4 . Therefore, the electrolysis performance of the upper electrode 2 and the lower electrode 4 can be maintained. As a result, it is possible to suppress the deterioration of the sodium hypochlorite water production efficiency due to long-term use.
- FIG. 3 is a block diagram showing the configuration of the electrolyzer 200 of this embodiment.
- the electrolyzer 200 further includes a switch section 6 , a control section 8 and a power supply section 10 .
- the power supply unit 10 generates voltage (DC voltage) to be applied to the upper electrode 2 and the lower electrode 4 .
- the power supply unit 10 is, for example, a rechargeable battery (secondary battery) or a dry battery.
- the power supply unit 10 is not particularly limited as long as it can generate a voltage (DC voltage) to be applied to the upper electrode 2 and the lower electrode 4 .
- the power supply unit 10 may be a power supply device that converts AC voltage to DC voltage.
- the switch section 6 controls the start and end of voltage application from the power supply section 10 to the upper electrode 2 and the lower electrode 4 .
- the switch section 6 also includes an inverting section 61 .
- the inversion part 61 inverts the polarities of the upper electrode 2 and the lower electrode 4 .
- the inversion unit 61 inverts the polarities of the voltages applied to the upper electrode 2 and the lower electrode 4 .
- the switch unit 6 includes, for example, switch elements.
- the switch element is, for example, a semiconductor switch.
- the control unit 8 controls the switch unit 6. Specifically, when the operation unit 250 is operated by the user, the control unit 8 controls the switch unit 6 to start applying voltage from the power supply unit 10 to the upper electrode 2 and the lower electrode 4 . Further, the control unit 8 stops applying the voltage from the power supply unit 10 to the upper electrode 2 and the lower electrode 4 after a certain period of time has elapsed since the application of the voltage to the upper electrode 2 and the lower electrode 4 was started.
- control unit 8 controls the switch unit 6 (reversing unit 61) during the execution of the aqueous sodium hypochlorite generation process (during the electrolysis process for a certain period of time) to switch the upper electrode 2 and the lower electrode 4. Invert the polarity once.
- the process of reversing the polarities of the upper electrode 2 and the lower electrode 4 may be referred to as "reversal process”.
- the control unit 8 has a processor such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit). Alternatively, the control unit 8 may have a microcomputer or dedicated hardware.
- a processor such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit).
- the control unit 8 may have a microcomputer or dedicated hardware.
- control unit 8 When the control unit 8 has a processor, the control unit 8 further has a memory.
- the memory stores various computer programs executed by the processor and various data.
- the memory is, for example, a semiconductor memory.
- the semiconductor memory includes, for example, RAM (Random Access Memory) and ROM (Read Only Memory).
- the semiconductor memory includes at least one of flash memory, EPROM (Erasable Programmable Read Only Memory), and EEPROM (Electrically Erasable Programmable Read-Only Memory) in place of or in addition to RAM and ROM. obtain.
- control unit 8 When the control unit 8 has dedicated hardware, the control unit 8 may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field - Programmable Gate Array), or a circuit combining these.
- ASIC Application Specific Integrated Circuit
- FPGA Field - Programmable Gate Array
- the upper electrode 2 and the lower electrode 2 are The polarity of the side electrode 4 is reversed. Therefore, it is not necessary to provide a dedicated period for suppressing adhesion of scale components to the surfaces of the upper electrode 2 and the lower electrode 4 . As a result, the user can continuously use the spray device 100 (the electrolyzer 200).
- FIG. 4 is a sequence diagram showing inversion processing.
- the control unit 8 controls the switch unit 6 (reversing unit 61) during the execution of the sodium hypochlorite water generation process (during the electrolysis process for a certain period of time) so that the upper electrode 2 and the polarity of the lower electrode 4 is inverted once.
- the first anode period PT1 and the second anode period PT2 need not be distinguished, the first anode period PT1 and the second anode period PT2 are referred to as the "anode period PT.” Sometimes. Similarly, when there is no need to distinguish between the first cathode period NT1 and the second cathode period NT2, the first cathode period NT1 and the second cathode period NT2 may be referred to as the "cathode period NT.” In this embodiment, the length of the anode period PT and the length of the cathode period NT are equal.
- the upper electrode 2 and the lower electrode 4 have the same catalyst composition. Therefore, the anode performance (electrolysis performance) of the upper electrode 2 and the lower electrode 4 are substantially equal. Similarly, the cathode performance (electrolysis performance) of the upper electrode 2 and the lower electrode 4 are substantially equal. Therefore, by equalizing the length of the anode period PT and the length of the cathode period NT, it is possible to generate sodium hypochlorite water having a desired effective chlorine concentration. Moreover, according to the present embodiment, the length of the anode period PT and the length of the cathode period NT need only be equal, so the labor required for developing the electrolyzer 200 can be reduced.
- the upper electrode 2 and the lower electrode 4 have approximately the same surface area. Therefore, the anode performance (electrolysis performance) of the upper electrode 2 and the lower electrode 4 are more equal. Similarly, the cathode performance (electrolysis performance) of the upper electrode 2 and the lower electrode 4 are more equal. Therefore, by equalizing the length of the anode period PT and the length of the cathode period NT, it is possible to more reliably generate sodium hypochlorite water having the desired effective chlorine concentration.
- the present embodiment by reversing the polarities of the upper electrode 2 and the lower electrode 4 once during operation, it is possible to suppress adhesion of scale components to the surfaces of the upper electrode 2 and the lower electrode 4 .
- scale components may precipitate on the surface of the lower electrode 4 during the second cathode period NT2.
- a scale component is dissipated from the surface of the lower electrode 4 during the period PT2. Therefore, adhesion of scale components to the surface of the lower electrode 4 can be suppressed.
- the polarity of the lower electrode 4 is reversed from negative to positive, thereby suppressing the adhesion of the scale components to the surface of the lower electrode 4. can.
- the polarities of the upper electrode 2 and the lower electrode 4 are reversed by controlling the switch section 6 (reversing section 61) during the operation period. Therefore, the number of times that the upper electrode 2 functions as an anode and the number of times that it functions as a cathode are uniform, so that the electrolysis performance of the upper electrode 2 can be maintained for a longer period of time. Similarly, the electrolysis performance of the lower electrode 4 can be maintained for a longer period of time.
- control unit 8 controls the switch unit 6 (reversing unit 61) during the operation period so that the length of the anode period PT and the length of the cathode period NT are equal to each other. 2 and lower electrode 4 are reversed. Therefore, the cumulative time during which the upper electrode 2 functions as an anode and the cumulative time during which it functions as a cathode are uniform, so that the electrolysis performance of the upper electrode 2 can be maintained for a longer period of time. Similarly, the electrolysis performance of the lower electrode 4 can be maintained for a longer period of time.
- FIG. 5 is a diagram showing a part of the cross section of the electrolyzer 200 of this embodiment.
- the lower housing 230 has side walls 231 , a floor 232 , an upper support 233 , a lower support 234 , a first boss 235 and a second boss 236 .
- the electrolyzer 200 further includes spacers 3 , first fastening members 12 , second fastening members 14 , control substrates 16 , first fixing members 18 and second fixing members 20 .
- the side wall portion 231 forms the side wall of the lower housing 230 .
- the side wall portion 231 is cylindrical.
- the floor portion 232 is coupled to the inner peripheral surface of the side wall portion 231 to form the liquid storage portion 240 together with the side wall portion 231 .
- the floor portion 232 forms the bottom wall of the liquid containing portion 240 .
- the side wall portion 231 forms a side wall of the liquid containing portion 240 .
- the upper support portion 233 supports the outer peripheral surfaces of the upper electrode 2 and the lower electrode 4 .
- the upper support portion 233 has a cylindrical shape, is coupled to the floor portion 232 inside the side wall portion 231 , and protrudes upward from the floor portion 232 .
- the first boss portion 235 and the second boss portion 236 are coupled to the floor portion 232 inside the upper support portion 233 and protrude upward from the floor portion 232 .
- the first boss portion 235 has a higher height from the floor portion 232 than the second boss portion 236 and supports the lower surface of the upper electrode 2 .
- the second boss portion 236 supports the lower surface of the lower electrode 4 .
- the spacer 3 is arranged between the upper electrode 2 and the lower electrode 4 to avoid contact between the upper electrode 2 and the lower electrode 4 .
- the upper electrode 2 and the lower electrode 4 are vertically spaced apart by the thickness of the spacer 3 .
- the first fastening member 12 fastens the upper electrode 2 to the first boss portion 235 .
- the second fastening member 14 fastens the lower electrode 4 to the second boss portion 236 .
- the first fastening member 12 has a head portion 121 and a shaft portion 122 .
- the second fastening member 14 has a head portion 141 and a shaft portion 142 .
- the upper electrode 2 has a first through hole 21 and a second through hole 22 .
- the lower electrode 4 has a first through hole 41 and a second through hole 42 .
- the diameter of the first through hole 41 of the lower electrode 4 is approximately the same as the outer diameter of the first boss portion 235 or larger than the outer diameter of the first boss portion 235 .
- a first boss portion 235 is inserted through the first through hole 41 of the lower electrode 4 .
- the diameter of the first through hole 21 of the upper electrode 2 is smaller than the diameter of the first through hole 41 of the lower electrode 4 .
- the first through hole 21 of the upper electrode 2 overlaps the through hole of the first boss portion 235 .
- the through hole of the first boss portion 235 extends to the lower surface of the floor portion 232 .
- the diameter of the first through-hole 21 of the upper electrode 2 is smaller than the diameter of the head portion 121 of the first fastening member 12 and substantially the same as the diameter of the shaft portion 122 of the first fastening member 12, or the diameter of the shaft portion 122 of the first fastening member 12.
- the shaft portion 122 of the first fastening member 12 is inserted through the first through hole 21 of the upper electrode 2 and the through hole of the first boss portion 235 .
- a head portion 121 of the first fastening member 12 contacts the upper surface of the upper electrode 2 .
- the diameter of the second through hole 22 of the upper electrode 2 is larger than the diameter of the second through hole 42 of the lower electrode 4.
- the second through hole 22 of the upper electrode 2 overlaps the second through hole 42 of the lower electrode 4 .
- the diameter of the second through hole 22 of the upper electrode 2 is larger than the diameter of the head portion 141 of the second fastening member 14 .
- the second through hole 42 of the lower electrode 4 overlaps the through hole of the second boss portion 236 .
- the through hole of the second boss portion 236 extends to the bottom surface of the floor portion 232 .
- the diameter of the second through hole 42 of the lower electrode 4 is smaller than the diameter of the head portion 141 of the second fastening member 14 and the outer diameter of the second boss portion 236, and substantially the diameter of the shaft portion 142 of the second fastening member 14. It is equal to or larger than the diameter of the shaft portion 142 of the second fastening member 14 .
- the shaft portion 142 of the second fastening member 14 is inserted through the second through hole 42 of the lower electrode 4 and the through hole of the second boss portion 236 .
- the head portion 141 of the second fastening member 14 is inserted through the second through hole 22 of the upper electrode 2 and contacts the upper surface of the lower electrode 4 .
- first fastening member 12 and the second fastening member 14 are bolts.
- a groove is formed.
- thread grooves may be formed on the inner peripheral surfaces of the through holes of the first boss portion 235 and the second boss portion 236 . In this case, the first fastening member 12 is screwed onto the first boss portion 235 and the second fastening member 14 is screwed onto the second boss portion 236 .
- the control board 16 is arranged below the floor 232 .
- the control board 16 has a first through hole 161 and a second through hole 162 .
- the diameter of the first through hole 161 of the control board 16 is substantially the same as the diameter of the shaft portion 122 of the first fastening member 12 or larger than the diameter of the shaft portion 122 of the first fastening member 12 .
- the diameter of the second through hole 162 of the control board 16 is substantially the same as the diameter of the shaft portion 142 of the second fastening member 14 or larger than the diameter of the shaft portion 142 of the second fastening member 14 .
- the shaft portion 122 of the first fastening member 12 protrudes from the lower surface of the floor portion 232 and is inserted through the first through hole 161 of the control board 16 .
- the tip of the shaft portion 122 of the first fastening member 12 protrudes from the lower surface of the control board 16 .
- the shaft portion 142 of the second fastening member 14 protrudes from the lower surface of the floor portion 232 and is inserted through the second through hole 162 of the control board 16 .
- the tip of the shaft portion 142 of the second fastening member 14 protrudes from the bottom surface of the control board 16 .
- the first fixing member 18 is connected to the tip of the shaft portion 122 of the first fastening member 12 to support the control board 16 .
- the second fixing member 20 is connected to the tip of the shaft portion 142 of the second fastening member 14 to support the control board 16 .
- the first fixing member 18 and the second fixing member 20 are nuts, for example.
- a lower support portion 234 of the lower housing 230 is coupled to the floor portion 232 inside the side wall portion 231 and protrudes downward from the floor portion 232 .
- the first fixing member 18 and the second fixing member 20 are connected to the first fastening member 12 and the second fastening member 14 respectively such that the upper surface of the control board 16 contacts the lower end of the lower support portion 234 .
- the lower support portion 234 supports the upper surface of the control board 16 .
- the switch section 6 and the control section 8 described with reference to FIG. 3 are mounted on the control board 16 .
- the power supply section 10 described with reference to FIG. 3 is arranged below the floor section 232 of the lower housing 230 .
- first fastening member 12, the second fastening member 14, the first fixing member 18, and the second fixing member 20 are conductive.
- first fastening member 12 and second fastening member 14 are made of titanium.
- a conductive portion that contacts the first fixing member 18 is formed on the lower surface of the control board 16 , and voltage is applied from the control board 16 to the upper electrode 2 via the first fixing member 18 and the first fastening member 12 . be.
- a conductive portion is formed on the lower surface of the control board 16 to be in contact with the second fixing member 20 , and a voltage is applied from the control board 16 to the lower electrode 4 via the second fixing member 20 and the second fastening member 14 . is applied.
- FIG. 6 is a plan view showing the upper electrode 2.
- FIG. 7 is a plan view showing the lower electrode 4.
- the outer shape of the upper electrode 2 and the lower electrode 4 is circular. Moreover, the upper electrode 2 and the lower electrode 4 are mesh-like. Since the upper electrode 2 has a mesh shape, the chloride ion-containing water contained in the liquid container 240 flows through the mesh of the upper electrode 2 to the lower side of the upper electrode 2 . As a result, the lower electrode 4 is immersed in the chloride ion-containing water.
- FIG. 8 is a plan view showing the lower housing 230.
- the side wall portion 231 is cylindrical and the floor portion 232 is disk-shaped.
- the upper support portion 233 is cylindrical.
- the upper support portion 233 has an inner diameter that allows the upper electrode 2 and the lower electrode 4 to be arranged inside the upper support portion 233 .
- the inner diameter of the upper support portion 233 is the same as the diameters of the upper electrode 2 and the lower electrode 4 or larger than the diameters of the upper electrode 2 and the lower electrode 4 .
- FIG. 9 is a diagram showing the first step included in the assembling process of the electrolyzer 200.
- FIG. 10 is a diagram showing the second step included in the assembling process of the electrolyzer 200.
- FIG. 11A and 11B are diagrams showing the third step included in the assembly process of the electrolyzer 200.
- FIG. FIG. 12 is a cross-sectional view of the electrolyzer 200. As shown in FIG.
- the lower electrode 4 is arranged on the lower housing 230 in the first step. Specifically, the first boss portion 235 is inserted through the first through hole 41 of the lower electrode 4 , and the lower surface of the lower electrode 4 abuts the upper end of the second boss portion 236 to form the second through hole 41 of the lower electrode 4 .
- the lower electrode 4 is arranged inside the upper support portion 233 so that the hole 42 communicates with the through hole of the second boss portion 236 .
- the shaft portion 142 of the second fastening member 14 is inserted into the through hole of the second boss portion 236 via the second through hole 42 of the lower electrode 4, and the head portion 141 of the second fastening member 14 is positioned downward. It abuts on the upper surface of the electrode 4 .
- spacers 3 are arranged on the upper surface of lower electrodes 4 .
- the spacer 3 has an annular shape and is arranged on the outer periphery of the lower electrode 4 .
- the upper electrode 2 is arranged on the lower housing 230 in the third step. Specifically, the head portion 141 of the second fastening member 14 is inserted through the second through hole 22 of the upper electrode 2 , and the lower surface of the upper electrode 2 abuts the upper end of the first boss portion 235 .
- the upper electrode 2 is arranged inside the upper support portion 233 so that the through hole 21 communicates with the through hole of the first boss portion 235 .
- the shaft portion 122 of the first fastening member 12 is inserted through the first through hole 21 of the upper electrode 2 and into the through hole of the first boss portion 235, and as shown in FIG.
- the head portion 121 contacts the upper surface of the upper electrode 2 .
- Embodiment 1 of the present invention has been described above with reference to FIGS.
- the upper electrode 2 and the lower electrode 4 are mesh-shaped in the present embodiment, the upper electrode 2 and the lower electrode 4 are not limited to being mesh-shaped. It is sufficient that the upper electrode 2 and the lower electrode 4 have a plurality of through holes.
- Embodiment 2 of the present invention will be described with reference to FIGS. 3 and 13.
- FIG. However, matters different from those of the first embodiment will be explained, and explanations of matters that are the same as those of the first embodiment will be omitted.
- the second embodiment differs from the first embodiment in the inversion process. Specifically, in the second embodiment, the polarities of the upper electrode 2 and the lower electrode 4 are reversed multiple times during operation.
- FIG. 13 is a sequence diagram showing an example of the reversing process performed by the electrolyzer 200 of this embodiment.
- the control unit 8 controls the switch unit 6 (reversing unit 61) during the sodium hypochlorite water generation process (during the electrolysis process for a certain period of time) so that the upper electrode 2 and the polarity of the lower electrode 4 is reversed three times.
- the length of the anode period PT and the length of the cathode period NT are equal.
- the interval (cycle) of the polarity reversal is constant.
- the polarities of the upper electrode 2 and the lower electrode 4 are reversed three times, so for example, when the length of the operation period is 12 minutes, the polarity reversal time interval (polarity reversal cycle) is 3 minutes.
- the second embodiment of the present invention has been described above with reference to FIGS. According to this embodiment, it is possible to shorten the length of the cathode period NT by increasing the frequency of reversal of the polarities of the upper electrode 2 and the lower electrode 4 during the operating period. As a result, adhesion of scale components to the surfaces of the upper electrode 2 and the lower electrode 4 can be further suppressed. Specifically, the polarities of the upper electrode 2 and the lower electrode 4 can be reversed before scale components are deposited on the upper electrode 2 and the lower electrode 4 . Alternatively, by increasing the frequency of reversal of the polarities of the upper electrode 2 and the lower electrode 4 during operation, the amount of scale components deposited on the upper electrode 2 and the lower electrode 4 is reduced. As a result, adhesion of scale components to the surfaces of the upper electrode 2 and the lower electrode 4 can be further suppressed.
- the effective chlorine concentration decreases as the number of times the polarities of the upper electrode 2 and the lower electrode 4 are reversed (frequency of reversal) increases during the operating period.
- the control unit 8 reverses the polarities of the upper electrode 2 and the lower electrode 4 multiple times within a range where sodium hypochlorite water having a desired effective chlorine concentration can be generated. For example, when the effective chlorine concentration achieved when the polarities of the upper electrode 2 and the lower electrode 4 are not reversed during the operation period is 100%, the control unit 8 controls the effective chlorine concentration to be 90% or more, The polarities of the upper electrode 2 and the lower electrode 4 are reversed multiple times.
- control unit 8 may reverse the polarities of the upper electrode 2 and the lower electrode 4 multiple times within a range in which the effective chlorine concentration is 600 ppm or more, or may reverse the polarities of the upper electrode 2 and the lower electrode 4 in a range in which the effective chlorine concentration is 500 ppm or more.
- the polarities of the electrode 2 and the lower electrode 4 may be reversed multiple times.
- Embodiment 3 Next, Embodiment 3 of the present invention will be described with reference to FIGS. 3 and 14. FIG. However, matters different from those of the first and second embodiments will be explained, and explanations of matters that are the same as those of the first and second embodiments will be omitted.
- Embodiment 3 differs from Embodiments 1 and 2 in the inversion process. Specifically, in Embodiment 3, the polarities of the upper electrode 2 and the lower electrode 4 at the end of the operating period are the same as those at the start of the operating period.
- FIG. 14 is a sequence diagram showing an example of the reversing process performed by the electrolyzer 200 of this embodiment.
- the control unit 8 controls the switch unit 6 (reversing unit 61) during the sodium hypochlorite water generation process (during the electrolysis process for a certain period of time) so that the upper electrode 2 and the polarity of the lower electrode 4 is inverted twice.
- the length of the anode period PT and the length of the cathode period NT are equal.
- the polarity inversion time interval (polarity inversion cycle) is 4 minutes.
- control unit 8 determines that the polarity of the upper electrode 2 and the lower electrode 4 at the start of the operation period is
- the switch section 6 (reversing section 61) is controlled during operation so that the polarities of the upper electrode 2 and the lower electrode 4 are reversed.
- the third embodiment of the present invention has been described above with reference to FIGS. According to the present embodiment, even if the polarities of the upper electrode 2 and the lower electrode 4 at the end of the operation period are the same as the polarities at the start of the operation period, the scale components are Adhesion to the surface of the electrode 4 can be suppressed.
- the electrolysis performance of the upper electrode 2 can be maintained for a longer period of time.
- the electrolysis performance of the lower electrode 4 can be maintained for a longer period of time.
- the length of the anode period PT and the length of the cathode period NT are equal. Therefore, by repeating the sodium hypochlorite water generation process, the accumulated time for the upper electrode 2 to function as an anode and the accumulated time for functioning as a cathode become uniform. Therefore, the electrolysis performance of the upper electrode 2 can be maintained for a longer period of time. Similarly, the electrolysis performance of the lower electrode 4 can be maintained for a longer period of time.
- Embodiment 4 of the present invention will be described with reference to FIGS. 3 and 15.
- FIG. matters different from those of Embodiments 1 to 3 will be explained, and explanations of matters that are the same as those of Embodiments 1 to 3 will be omitted.
- Embodiment 4 differs from Embodiments 1 to 3 in inversion processing. Specifically, in the third embodiment, the length of the anode period PT and the length of the cathode period NT are different.
- FIG. 15 is a sequence diagram showing an example of the reversing process performed by the electrolyzer 200 of this embodiment.
- the control unit 8 controls the switch unit 6 (reversing unit 61) during the sodium hypochlorite water generation process (during the electrolysis process for a certain period of time) so that the upper electrode 2 and the polarity of the lower electrode 4 is reversed three times.
- the upper electrode 2 and the lower electrode 4 have different catalyst components.
- the surface areas of the upper electrode 2 and the lower electrode 4 are different. Therefore, the amounts of chlorine gas generated per unit time from the upper electrode 2 and the lower electrode 4 are different. Chlorine gas is generated from the anode. As the amount of chlorine gas generated decreases, the effective chlorine concentration decreases.
- the amount of chlorine gas generated per unit time from the lower electrode 4 is smaller than the amount of chlorine gas generated per unit time from the upper electrode 2 . Therefore, as shown in FIG. 15, the control unit 8 makes the period during which the lower electrode 4 functions as an anode (second anode period PT2) shorter than the period during which the lower electrode 4 functions as a cathode (second cathode period NT2).
- the switch section 6 inverting section 61 is controlled such that the period during which the upper electrode 2 functions as an anode (first anode period PT1) is longer than the period during which it functions as a cathode (first cathode period NT1).
- the total amount of chlorine gas generated during operation can be maintained at the amount required to achieve the desired effective chlorine concentration.
- the controller 8 keeps the ratio (duty ratio) between the length of the first anode period PT1 and the length of the first cathode period NT1 constant, and the length of the second cathode period NT2 and the length of the second anode period PT2.
- the fourth embodiment of the present invention has been described above with reference to FIGS. According to this embodiment, adhesion of scale components to the surfaces of the upper electrode 2 and the lower electrode 4 can be suppressed. Furthermore, according to this embodiment, even if the amounts of chlorine gas generated per unit time from the upper electrode 2 and the lower electrode 4 are different, sodium hypochlorite water having the desired effective chlorine concentration can be obtained. can be generated.
- Electrode 2 may function as a cathode and lower electrode 4 may function as an anode.
- hypochlorous acid water can be generated by electrolysis using chloride ion-containing water as the main electrolyte, similarly to sodium hypochlorite water.
- the chloride ion-containing water may be an aqueous solution capable of generating hypochlorous acid water, such as an aqueous sodium chloride solution, an aqueous potassium chloride solution, or hydrochloric acid, or an aqueous solution obtained by mixing all or part of these.
- hypochlorite water sodium hypochlorite (NaClO) hydrates in aqueous solution.
- sodium ions (Na + ) and hypochlorite ions (ClO - ) are present in the aqueous solution.
- hypochlorous acid water hypochlorous acid (HClO) exists in the aqueous solution as HClO molecules.
- the abundance ratio of these components in the aqueous solution is in an equilibrium relationship determined by the pH of the aqueous solution, and these components may coexist depending on the pH.
- hypochlorite water As shown in the table above, the abundance ratio of hypochlorous acid ions (ClO ⁇ ) is higher than the abundance ratio of hypochlorous acid (HClO), It is called sodium hypochlorite water.
- hypochloric acid such as hydrochloric acid (HCl)
- sodium hypochlorite solution sodium hypochlorite solution
- hypochlorite ions ClO ⁇
- hypochlorous acid HlO
- the abundance ratio of hypochlorous acid HlO
- hypochlorous acid ion ClO -
- pure water electrical resistivity 18.2 M ⁇ cn
- commercially available salt trade name: sodium chloride (special grade), manufacturer: FUJIFILM Wako Pure Chemical Co., Ltd.
- a saline solution aqueous sodium chloride solution
- Electrolysis time was 12 minutes. The polarities of the upper electrode 2 and the lower electrode 4 were reversed by setting the polarity reversal time interval (polarity reversal cycle) to a constant time.
- FIG. 16 is a diagram showing experimental results of this embodiment. Specifically, FIG. 16 shows the experimental results of Experiments 1-6.
- the horizontal axis indicates the polarity reversal time interval [min].
- the vertical axis indicates the effective chlorine concentration [ppm].
- Plots V1-V6 show the experimental results of Experiments 1-6, respectively.
- the effective chlorine concentration in Experiment 2 was approximately the same value as the effective chlorine concentration in Experiment 1 (approximately 625 ppm).
- the effective chlorine concentration in Experiment 3 was slightly lower than that in Experiment 1 (approximately 620 ppm), but was 600 ppm or higher.
- the effective chlorine concentration in Experiments 4 and 5 was lower than 600 ppm, but was 550 ppm or more.
- the effective chlorine concentration in Experiment 6 was lower than 500 ppm.
- the final pH of the aqueous solution is about 9.00.
- the abundance ratio of hypochlorite ions is higher than the abundance ratio of hypochlorous acid (HClO), so the final aqueous solution is sodium hypochlorite water. is called.
- the present invention is useful in the field of disinfection and deodorization.
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Abstract
Description
以下、図1~図12を参照して本発明の実施形態1を説明する。まず、図1を参照して噴霧装置100を説明する。図1は、噴霧装置100の外観を示す図である。本実施形態において、噴霧装置100は、次亜塩素酸ナトリウム水を噴霧する。噴霧装置100は、例えば、除菌又は消臭のために用いることができる。
続いて、図3及び図13を参照して本発明の実施形態2について説明する。但し、実施形態1と異なる事項を説明し、実施形態1と同じ事項についての説明は割愛する。実施形態2は、反転処理が実施形態1と異なる。詳しくは、実施形態2では、上側電極2及び下側電極4の極性が運転期間中に複数回反転する。
続いて、図3及び図14を参照して本発明の実施形態3について説明する。但し、実施形態1、2と異なる事項を説明し、実施形態1、2と同じ事項についての説明は割愛する。実施形態3は、反転処理が実施形態1、2と異なる。詳しくは、実施形態3では、運転期間の終了時の上側電極2及び下側電極4の極性が、運転期間の開始時と同じ極性となる。
続いて、図3及び図15を参照して本発明の実施形態4について説明する。但し、実施形態1~3と異なる事項を説明し、実施形態1~3と同じ事項についての説明は割愛する。実施形態4は、反転処理が実施形態1~3と異なる。詳しくは、実施形態3では、陽極期間PTの長さと陰極期間NTの長さとが異なる。
pH=7.53+log10[ClO-]/[HClO]
実験1では、上側電極2及び下側電極4の極性を反転させずに電気分解を12分間行い、有効塩素濃度を測定した(極性反転回数:0回)。
実験2では、12分間の電気分解中に上側電極2及び下側電極4の極性を1回反転させて、有効塩素濃度を測定した(極性反転回数:1回)。極性反転時間間隔は、6分であった。
実験3では、12分間の電気分解中に上側電極2及び下側電極4の極性を3回反転させて、有効塩素濃度を測定した(極性反転回数:3回)。極性反転時間間隔は、3分であった。
実験4では、12分間の電気分解中に上側電極2及び下側電極4の極性を5回反転させて、有効塩素濃度を測定した(極性反転回数:5回)。極性反転時間間隔は、2分であった。
実験5では、12分間の電気分解中に上側電極2及び下側電極4の極性を11回反転させて(極性反転回数:11回)、有効塩素濃度を測定した。極性反転時間間隔は、1分であった。
実験6では、12分間の電気分解中に上側電極2及び下側電極4の極性を23回反転させて、有効塩素濃度を測定した(極性反転回数:23回)。極性反転時間間隔は、30秒であった。
4 :下側電極
6 :スイッチ部
8 :制御部
61 :反転部
200 :電気分解装置
Claims (7)
- 次亜塩素酸ナトリウム水又は次亜塩素酸水を生成する電気分解装置であって、
第1電極と、
前記第1電極に対向し、前記第1電極と共に、塩化物イオンを含有する水溶液を主電解質として電気分解を行い、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水を生成する第2電極と、
前記第1電極及び前記第2電極の極性を反転させる反転部と、
前記反転部を制御する制御部と
を備え、
前記制御部は、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成中に前記反転部を制御して前記第1電極及び前記第2電極の極性を反転させる、電気分解装置。 - 前記制御部は、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成中に前記反転部を制御して前記第1電極及び前記第2電極の極性を複数回反転させる、請求項1に記載の電気分解装置。
- 前記制御部は、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成終了時における前記第1電極及び前記第2電極の極性が、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成開始時における前記第1電極及び前記第2電極の極性に対して反転しているように、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成中に前記反転部を制御して前記第1電極及び前記第2電極の極性を反転させる、請求項1又は請求項2に記載の電気分解装置。
- 前記制御部は、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成開始時における前記第1電極及び前記第2電極の極性が、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の前回の生成終了時における前記第1電極及び前記第2電極の極性に対して反転しているように、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成中に前記反転部を制御して前記第1電極及び前記第2電極の極性を反転させる、請求項1又は請求項2に記載の電気分解装置。
- 前記第1電極及び前記第2電極は、同じ触媒成分を有する、請求項1から請求項4のいずれか1項に記載の電気分解装置。
- 前記制御部は、前記第1電極の極性を正極性に維持する第1期間の長さと、前記第1電極の極性を負極性に維持する第2期間の長さとの比が一定となり、前記第2電極の極性を負極性に維持する第3期間の長さと、前記第2電極の極性を正極性に維持する第4期間の長さとの比が一定となるように、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成中に前記反転部を制御して前記第1電極及び前記第2電極の極性を反転させる、請求項1から請求項5のいずれか1項に記載の電気分解装置。
- 前記制御部は、前記第1期間の長さと前記第2期間の長さとが等しくなり、前記第3期間の長さと前記第4期間の長さとが等しくなるように、前記次亜塩素酸ナトリウム水又は前記次亜塩素酸水の生成中に前記反転部を制御して前記第1電極及び前記第2電極の極性を反転させる、請求項6に記載の電気分解装置。
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JP2000042556A (ja) * | 1998-05-28 | 2000-02-15 | Shimadzu Corp | 電解水製造装置 |
JP2002119970A (ja) * | 2000-10-13 | 2002-04-23 | Silver Seiko Ltd | 用水・排水の処理装置 |
JP2003094060A (ja) * | 2001-09-27 | 2003-04-02 | Denso Corp | 電解装置 |
JP2004204328A (ja) * | 2002-12-26 | 2004-07-22 | Takatoshi Nakajima | 次亜塩素酸水の製造方法及び利用方法 |
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JP2000042556A (ja) * | 1998-05-28 | 2000-02-15 | Shimadzu Corp | 電解水製造装置 |
JP2002119970A (ja) * | 2000-10-13 | 2002-04-23 | Silver Seiko Ltd | 用水・排水の処理装置 |
JP2003094060A (ja) * | 2001-09-27 | 2003-04-02 | Denso Corp | 電解装置 |
JP2004204328A (ja) * | 2002-12-26 | 2004-07-22 | Takatoshi Nakajima | 次亜塩素酸水の製造方法及び利用方法 |
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