JP2014015646A - Electrolytic treatment water generator and method for generating electrolytic treatment water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration in the function of a water quality sensor.SOLUTION: The electrolytic treatment water generator comprises: a first electrolytic chamber 314; a second electrolytic chamber 315; an ion permeable diaphragm 311; a first electrode 312; a second electrode 313; a DC power source 32; a first feed part 141 of selectively feeding either service water having a low electrolyte concentration or an electrolyte aqueous solution to the first electrolytic chamber; a connection changing part 33 of changing the connection between the first electrolytic chamber and a first duct 351 and the connection between the first electrolytic chamber and a drainage 353; and a water quality sensor 34 provided on the first duct, and practices: a step of changing the connection between the first electrolytic chamber and the first duct to the connection between the first electrolytic chamber and the drainage in a state where treatment water is exhausted from the first electrolytic chamber; a step of changing the voltage to be applied to reverse voltage; a step of changing the voltage to be applied to normal voltage; and a step of changing the connection between the first electrolytic chamber and the first duct after the detection of the exhaust of the treatment water from the first electrolytic chamber.

Description

  The present invention relates to a technique for electrolyzing an electrolytic aqueous solution to generate electrolytically treated water.

  Conventionally, electrolytically treated water obtained by electrolyzing an aqueous electrolyte solution has been used in various fields. If calcium ions, magnesium ions, etc. are present in the raw water, when a voltage of the same polarity is continuously applied to the electrodes, calcium compounds and magnesium compounds are deposited, particularly on the cathode side, preventing electrolysis. Therefore, cleaning is performed by periodically applying a voltage of reverse polarity to the electrode to remove precipitates from the electrode.

  In the ionic water generator disclosed in JP-A-9-150154, tap water is electrolyzed to generate acidic water and alkaline water. When applying a reverse polarity voltage to clean the electrode, water is not discharged from the water outlet. In the saline electrolysis method disclosed in JP-A-6-346266, the polarity of the DC voltage applied to both electrodes is reversed for a very short time. In the prior art disclosed in Japanese Patent Application Laid-Open No. 9-113477, an ORP sensor is in contact with discharged water in a strongly electrolyzed water generating apparatus that electrolyzes raw water to obtain anode water and cathode water. In the ORP sensor, Ag / AgCl is used as a comparison electrode, and Pt is used as an indicator electrode.

In the water treatment device disclosed in Japanese Patent Application Laid-Open No. 2008-100180, permeated water is obtained with a reverse osmosis membrane. The reverse osmosis membrane is washed with strongly acidic water. Strongly acidic water is obtained by adding saline to permeated water and electrolyzing it.
JP-A-9-150154 JP-A-6-346266 JP-A-9-113477 JP 2008-100180 A

  By the way, in the strong electrolyzed water generating apparatus disclosed in JP-A-9-113477, if a reverse polarity voltage is applied to clean the electrodes, the liquidity of the electrolyzed water flowing into the ORP sensor becomes acidic. Reversal between and alkaline. In this case, since the ORP sensor has a simple structure, accurate measurement cannot be performed.

  An object of the present invention is to prevent deterioration of the function of a water quality sensor in an electrolyzed water generation apparatus.

  An electrolyzed water generating device according to an exemplary embodiment of the present invention includes a first electrolysis chamber, a second electrolysis chamber, and ions disposed between the first electrolysis chamber and the second electrolysis chamber. A permeable diaphragm; a first electrode disposed in the liquid in the first electrolytic chamber; a second electrode disposed in the liquid in the second electrolytic chamber; and the first electrode and the second electrode. A DC power supply that selectively applies one of a normal voltage and a reverse voltage between them, and an aqueous electrolyte solution is supplied to the first electrolysis chamber, or an electrolyte concentration is lower than that of the aqueous electrolyte solution, and is used to generate the aqueous electrolyte solution The first supply part that selectively supplies one of the water to be used and the aqueous electrolyte solution, the second supply part that supplies the aqueous electrolyte solution to the second electrolytic chamber, the first flow path, and the second electrolytic chamber A second flow path connected to the first flow path, a connection between the first electrolysis chamber and the first flow path, A connection switching unit that switches the connection between the first electrolysis chamber and the drainage channel, a water quality sensor that is provided on the first flow channel and is configured to measure only acidic or alkaline liquid, and a control unit. A) connecting the first electrolysis chamber and the first flow path, supplying the electrolyte aqueous solution to the first electrolysis chamber, and controlling the control unit to control the first electrode and the second electrode; By applying the normal voltage between the first electrolysis chamber and the first flow path from the state in which the treated water is discharged from the first electrolysis chamber, the connection between the first electrolysis chamber and the first flow path is established. A step of switching to a connection with a drainage channel, b) a step of changing a voltage applied between the first electrode and the second electrode after the step a) to the reverse voltage, and c) the step b. ) After the step, a voltage to be applied between the first electrode and the second electrode is passed through the passage. A step of changing to a voltage; d) a step of monitoring whether the liquid discharged from the first electrolysis chamber has changed to the treated water after the step c); and e) the step d). Then, after detecting that the liquid discharged from the first electrolysis chamber has changed to the treated water, the connection between the first electrolysis chamber and the drainage channel is connected to the first electrolysis chamber and the first flow. Switching to connection with the road.

  According to the present invention, it is possible to prevent deterioration of the function of the water quality sensor.

FIG. 1 is a diagram illustrating a configuration of a water treatment apparatus. FIG. 2 is a diagram illustrating a configuration of the electrolytically treated water generating device. FIG. 3 is a diagram showing a schematic structure of the water quality sensor. FIG. 4 is a diagram illustrating a first operation example of the electrolyzed water generating device. FIG. 5 is a diagram illustrating a second operation example of the electrolyzed water generating device. FIG. 6 is a diagram illustrating a third operation example of the electrolyzed water generating device. FIG. 7 is a diagram illustrating a fourth operation example of the electrolyzed water generating device.

  The “aqueous electrolyte solution” in the present specification is water containing an electrolyte that can be electrolyzed, and in this embodiment, is an aqueous solution of an ionic compound containing chlorine such as saline or tap water. . “Water for use” is water to which an electrolyte is added to produce an aqueous electrolyte solution. Accordingly, the electrolyte concentration of the service water is lower than that of the aqueous electrolyte solution. In this embodiment, water for use is permeated water or pure water obtained by permeating through a reverse osmosis membrane.

  FIG. 1 is a diagram showing a water treatment device 1 including an electrolytically treated water generating device according to an exemplary embodiment of the present invention. The water treatment apparatus 1 is an apparatus that obtains filtered water of raw water such as seawater and river water as first treated water. The water treatment apparatus 1 also obtains water containing hypochlorous acid as the second treated water by the electrolytically treated water generating apparatus. Hereinafter, the electrolytically treated water containing hypochlorous acid is referred to as hypochlorous acid water.

  The water treatment device 1 includes a filter 11, an RO treatment unit 12, a permeate water storage unit 13, a supply unit 14, an electrolysis device 15, an electrolytic treatment water storage unit 16, and a control unit 17. The supply unit 14 and the electrolysis device 15 constitute an electrolyzed water generation device 150. In FIG. 1, only the main components among the components, piping, and valves of the water treatment apparatus 1 are shown.

  Raw water flows into the filter 11 via the pump 71 and the on-off valve 81. The filter 11 removes fine particles contained in the raw water. The RO processing unit 12 includes a bundled reverse osmosis membrane. The raw water is separated by the reverse osmosis membrane into permeate which is service water that has passed through the reverse osmosis membrane and concentrated water that does not pass through the reverse osmosis membrane. The concentrated water is drained through the on-off valve 82. The permeate is guided to the permeate reservoir 13 through the three-way valve 83. The permeated water can be drained by the three-way valve 83. Permeate is taken from the permeate reservoir 13.

  The permeate stored in the permeate reservoir 13 is also guided to the supply unit 14. The supply unit 14 applies an electrolyte to the permeated water and supplies the permeated water to the electrolysis apparatus 15 as described later. In this embodiment, sodium chloride is used as the electrolyte. The electrolyzer 15 generates hypochlorous acid water as electrolyzed water by electrolyzing the saline solution. The generated electrolytically treated water is stored in the electrolytically treated water reservoir 16. Electrolyzed water is taken from the electrolyzed water reservoir 16. The electrolytically treated water reservoir 16 is connected between the on-off valve 81 and the filter 11 via a pump 72 and an on-off valve 84.

  When the permeated water and the electrolytically treated water are generated, the on / off valves 81 and 82 are opened under the control of the control unit 17, and the three-way valve 83 connects the RO processing unit 12 and the permeated water storage unit 13. The on-off valve 84 is closed. The pump 71 is driven to generate permeated water. Moreover, the supply part 14 and the electrolysis apparatus 15 are controlled by the control part 17, and electrolyzed water is produced | generated. When bacteria and other substances are deposited on the reverse osmosis membrane, washing is performed using electrolytically treated water. At the time of cleaning, the on-off valve 81 is closed under the control of the control unit 17, and the RO processing unit 12 and the drainage channel are connected by the three-way valve 83. When the pump 72 is driven, electrolytically treated water is supplied to the RO treatment unit 12 and the reverse osmosis membrane is washed. All water used for cleaning is drained.

  FIG. 2 is a diagram illustrating a configuration of the electrolytically treated water generating device 150. Hereinafter, the electrolytically treated water is simply referred to as “treated water”. The supply unit 14 includes a pump 21, an electrolyte storage unit 22, a pump 23, and a mixing unit 24. The permeate is guided from the permeate reservoir 13 to the mixing unit 24 by the pump 21. The electrolyte reservoir 22 stores high-concentration saline. High-concentration saline is introduced from the electrolyte reservoir 22 into the mixing unit 24 by the pump 23. The mixing unit 24 mixes high-concentration saline with permeated water to generate diluted saline. In the present embodiment, the diluted saline is preferably 0.05% by weight saline. Hereinafter, the diluted saline is referred to as “electrolyte aqueous solution”. The salinity concentration of the permeated water, which is the water used for the production of the aqueous electrolyte solution, is less than 0.05% by weight. The electrolyte concentration of the aqueous electrolyte solution may be 0.05% or more. The electrolyte concentration of the service water should be lower than the electrolyte concentration of the aqueous electrolyte solution, and may be 0.05% or more.

  The flow path from the mixing unit 24 to the electrolysis device 15 is separated into a first supply path 251 and a second supply path 252. In the present embodiment, the first supply unit 141 is configured by the pump 21, the electrolyte storage unit 22, the pump 23, the mixing unit 24, the first supply path 251 and the like. The pump 21, the electrolyte reservoir 22, the pump 23, the mixing unit 24, the second supply path 252 and the like constitute a second supply unit 142. That is, in the first supply unit 141 and the second supply unit 142, the pump 21, the electrolyte storage unit 22, the pump 23, and the mixing unit 24 are shared. Of course, the 1st supply part 141 and the 2nd supply part 142 may be provided separately.

  When the pump 23 is stopped by the control unit 17, permeated water is supplied to the electrolysis device 15. Hereinafter, the permeated water is simply referred to as “use water”. When the pump 23 is operated, an electrolytic aqueous solution is supplied to the electrolysis device 15. In the present embodiment, the water for use or the aqueous electrolyte solution flows through the first supply path 251 and the second supply path 252 at the same time, but when the first supply section 141 and the second supply section 142 are provided separately, the first supply path 251 and In the second supply path 252, water for use or an aqueous electrolyte solution flows independently.

  The electrolyzer 15 includes an electrolytic cell 31, a DC power source 32, a three-way valve 33, a water quality sensor 34, and an ammeter 35. The electrolytic cell 31 includes an ion permeable diaphragm 311, a first electrode 312, and a second electrode 313. The electrolytic cell 31 is divided into a first electrolytic chamber 314 and a second electrolytic chamber 315 by an ion permeable diaphragm 311. That is, the ion permeable diaphragm 311 is disposed between the first electrolysis chamber 314 and the second electrolysis chamber 315. The first electrode 312 is disposed in the liquid in the first electrolysis chamber 314. The second electrode 313 is disposed in the liquid in the second electrolysis chamber 315.

  The DC power supply 32 applies a voltage between the first electrode 312 and the second electrode so that the first electrode 312 becomes an anode when the treated water is generated. Hereinafter, this voltage is referred to as “normal voltage”. The DC power supply 32 includes a voltage switching unit 321. The voltage switching unit 321 allows the DC power supply 32 to apply a voltage between the first electrode 312 and the second electrode 313 so that the second electrode 313 becomes an anode. Hereinafter, this voltage is referred to as “reverse voltage”. The DC power supply 32 selectively applies one of a normal voltage and a reverse voltage between both electrodes. The ammeter 35 is connected to the DC power source 32 and measures the current flowing between both electrodes. The control unit 17 includes a measurement value reference unit 171 that refers to the measurement value obtained by the ammeter 35, and controls each component while referring to the measurement value.

  The first supply path 251 of the first supply unit 141 is connected to the first electrolysis chamber 314. The second supply path 252 of the second supply unit 142 is connected to the second electrolysis chamber 315. As described above, in the present embodiment, the first supply unit 141 and the second supply unit 142 selectively supply one of the electrolytic aqueous solution and the water to the first electrolytic chamber 314 and the second electrolytic chamber 315 at the same time. . The first supply unit 141 and the second supply unit 142 may selectively supply one of the aqueous electrolyte solution and the irrigation water independently to the first electrolysis chamber 314 and the second electrolysis chamber 315. Note that the second supply unit 142 may supply only the aqueous electrolyte solution to the second electrolysis chamber 315.

  The first electrolysis chamber 314 is connected to the first flow path 351 through the three-way valve 33. The first flow path 351 is connected to the electrolytically treated water storage unit 16. The water quality sensor 34 is disposed on the first flow path 351. The water quality sensor 34 is used for confirming whether the processing liquid discharged from the first electrolysis chamber 314 is a desired processing liquid. The second electrolysis chamber 315 is connected to the second flow path 352. The second flow path 352 is connected to the drainage path 353. The three-way valve 33 is also connected to the drainage channel 353. The three-way valve 33 is a connection switching unit that switches a connection between the first electrolysis chamber 314 and the first flow path 351 and a connection between the first electrolysis chamber 314 and the drainage path 353.

  FIG. 3 is a diagram showing a schematic structure of the water quality sensor 34. The water quality sensor 34 includes an indicator electrode 341, a reference electrode 342, and an electrometer 343. The indicator electrode 341 is a platinum electrode. The reference electrode 342 is a silver / silver chloride electrode in which a silver chloride film is formed on silver. The indicator electrode 341 and the reference electrode 342 are fixed to a pipe that is the first flow path 351, and directly touch the liquid flowing through the first flow path 351.

  The water quality sensor 34 is an oxidation-reduction potentiometer. Unlike the normal oxidation-reduction potentiometer, the water quality sensor 34 does not have a diaphragm between the indicator electrode 341 and the reference electrode 342, and the potassium chloride aqueous solution is not held around the reference electrode by the semipermeable membrane. Thus, the water quality sensor 34 has an inexpensive structure. Therefore, the water quality sensor 34 is set to be able to measure only an acidic or alkaline liquid. In other words, the arithmetic processing circuit included in the water quality sensor 34 is set with various parameter values for calibration in order to measure only acidic or alkaline liquid. The measured value may be a value that substantially corresponds to the oxidation-reduction potential, for example, another measurement value as long as it can be converted into the oxidation-reduction potential.

  FIG. 4 is a diagram illustrating a flow of a first operation example for cleaning the electrodes, which is executed under the control of the control unit 17 in the electrolytically treated water generating apparatus 150. In a normal operation for generating hypochlorous acid water as treated water, the pumps 21 and 23 are operated, and diluted saline is supplied to both the electrolysis chambers 314 and 315 as an electrolyte aqueous solution. A normal voltage is applied between the electrodes 312 and 313. The three-way valve 33 connects the first electrolysis chamber 314 and the first flow path 351. The treated water is discharged from the first electrolysis chamber 314 and stored in the electrolytic treated water reservoir 16.

  When cleaning the electrode, first, the three-way valve 33 switches the connection between the first electrolysis chamber 314 and the first flow path 351 to the connection between the first electrolysis chamber 314 and the drainage path 353 (step S11). Next, the DC power source 32 changes the voltage applied between the electrodes 312 and 313 to a reverse voltage (step S12). The reverse voltage is applied for a short time. In this embodiment, after the reverse voltage is applied for about 30 seconds, the application of the reverse voltage is stopped (step S13). Thereafter, the pump 23 is stopped, and the liquid supplied to the electrolysis chambers 314 and 315 is changed from the electrolyte aqueous solution to water. As a result, the liquid in the electrolysis chambers 314 and 315 is replaced with service water (step S14).

  When supplying the water for 30 seconds and confirming that the amount of the supplied water has reached a predetermined amount, the operation of the pump 23 is resumed in a no-voltage state, and the liquid supplied to the electrolysis chambers 314 and 315 is The water is changed from the irrigation water to the electrolyte aqueous solution. Thereby, the liquid in the electrolysis chambers 314 and 315 is replaced with the electrolyte aqueous solution (step S15). The DC power supply 32 resumes application of the normal voltage between the electrodes 312 and 313, and the generation of treated water is started (step S16). At this time, the measured value reference unit 171 repeatedly refers to the measured value from the ammeter 35 (step S17). When the measured value falls within the predetermined range, the control unit 17 determines that the desired treated water is discharged from the first flow path 351. That is, the control unit 17 uses the measurement value reference unit 171 to monitor whether or not the liquid discharged from the first electrolysis chamber 314 has changed to treated water. By connecting the ammeter 35 to the DC power source 32, the quality of the liquid taken out from the first electrolysis chamber 314 can be easily monitored.

  When it is detected that the liquid discharged from the first electrolysis chamber 314 has changed to treated water, the three-way valve 33 connects the first electrolysis chamber 314 and the drainage channel 353, and connects the first electrolysis chamber 314 and the first electrolysis chamber 314. Switching to connection with one flow path 351 is performed. Thereby, the 1st electrolysis chamber 314 and the electrolysis treatment water storage part 16 are connected, and it returns to normal operation (Step S18). The water quality sensor 34 confirms whether the treated water has a desired quality.

  In the electrolyzed water generator 150, alkaline water is generated in the first electrolysis chamber 314 when a reverse voltage is applied. At this time, the liquid discharged from the first electrolysis chamber 314 is discarded by the three-way valve 33 and is not guided to the water quality sensor 34. Thereby, even if an inexpensive thing is used as the water quality sensor 34, it is possible to prevent the function of the water quality sensor 34 from being deteriorated. As a result, the manufacturing cost of the electrolyzed water generating device 150 can be reduced.

  In addition, since water is temporarily allowed to flow into the electrolysis chamber when a reverse voltage is applied, the consumption of the aqueous electrolyte solution can be reduced.

  In the above operation example, when the aqueous electrolyte solution is supplied to the electrolytic bath 31, the pump 23 connected to the electrolyte reservoir 22 is driven to mix the irrigation water and the high-concentration saline. However, when the electrolyte concentration of the permeated water is high, the permeated water may be used as the electrolyte aqueous solution as it is. That is, the operation example using the pump 23 and the operation of temporarily applying the reverse voltage between the electrodes without using the pump 23 may be switched depending on the state of the raw water or the state of the reverse osmosis membrane. The same applies to the other operation examples described below.

  FIG. 5 is a diagram illustrating a flow of a second operation example for cleaning the electrodes, which is executed under the control of the control unit 17 in the electrolytically treated water generating apparatus 150. In the second operation example, as in the first operation example, from the normal operation, the three-way valve 33 first connects the first electrolysis chamber 314 and the first flow path 351, and the first electrolysis chamber 314 and the drainage. The connection with the path 353 is switched (step S21). Thereafter, the pump 23 is stopped, and the liquid supplied to the electrolysis chambers 314 and 315 is changed from the electrolyte aqueous solution to water. As a result, the liquid in the electrolysis chambers 314 and 315 is replaced with service water (step S22).

  Next, the DC power supply 32 changes the voltage applied between the electrodes 312 and 313 to a reverse voltage (step S23). The reverse voltage is applied for a short time. In this embodiment, the reverse voltage is applied for about 30 seconds, and the reverse voltage application is stopped (step S24). Thereafter, the supply of water to both electrolysis chambers 314 and 315 is continued for a certain time, for example, 30 seconds.

  When it is confirmed that the amount of supplied water has reached a predetermined amount, the operation of the pump 23 is resumed, and the liquid supplied to the electrolysis chambers 314 and 315 is changed from the water to the aqueous electrolyte solution. As a result, the liquid in the electrolysis chambers 314 and 315 is replaced with the aqueous electrolyte solution (step S25). The DC power supply 32 resumes application of the normal voltage between the electrodes 312 and 313, and generation of treated water is started (step S26). At this time, similarly to the first operation example, the measurement value reference unit 171 repeatedly refers to the measurement value from the ammeter 35 (step S27), and the control unit 17 performs liquid discharge from the first electrolysis chamber 314. However, it is monitored whether it changed into treated water.

  When it is detected that the liquid discharged from the first electrolysis chamber 314 has changed to treated water, the three-way valve 33 connects the first electrolysis chamber 314 and the drainage channel 353, and connects the first electrolysis chamber 314 and the first electrolysis chamber 314. Switching to connection with one flow path 351 is performed. Thereby, the 1st electrolysis chamber 314 and the electrolysis treatment water storage part 16 are connected, and it returns to normal operation (Step S28).

  Also in the second operation example, the liquid discharged from the first electrolysis chamber 314 is discarded by the three-way valve 33 when a reverse voltage is applied. Thereby, alkaline water is not guide | induced to the water quality sensor 34, but the function fall of the water quality sensor 34 can be prevented. By temporarily flowing the water into the electrolysis chamber, the consumption of the aqueous electrolyte solution can be reduced.

  FIG. 6 is a diagram illustrating a flow of a third operation example for cleaning the electrodes, which is executed under the control of the control unit 17 in the electrolytically treated water generating apparatus 150. Also in the third operation example, first, from the normal operation, the three-way valve 33 switches the connection between the first electrolysis chamber 314 and the first flow path 351 to the connection between the first electrolysis chamber 314 and the drainage path 353. (Step S31). Next, the DC power supply 32 changes the voltage applied between the electrodes 312 and 313 to a reverse voltage (step S32). The reverse voltage is applied for a short time. In the present embodiment, after the reverse voltage is applied for about 30 seconds, the reverse voltage application is changed to the normal voltage application (step S33).

  Thereafter, similarly to the first operation example, the measurement value reference unit 171 repeatedly refers to the measurement value from the ammeter 35 (step S34), and the control unit 17 determines that the liquid discharged from the first electrolysis chamber 314 is discharged. Monitor whether it has changed to treated water.

  When it is detected that the liquid discharged from the first electrolysis chamber 314 has changed to treated water, the three-way valve 33 connects the first electrolysis chamber 314 and the drainage channel 353, and connects the first electrolysis chamber 314 and the first electrolysis chamber 314. Switching to connection with one flow path 351 is performed. Thereby, the 1st electrolysis chamber 314 and the electrolysis treated water storage part 16 are connected, and it returns to normal operation (Step S35).

  Also in the third operation example, the liquid discharged from the first electrolysis chamber 314 is discarded by the three-way valve 33 when the reverse voltage is applied. Thereby, alkaline water is not guide | induced to the water quality sensor 34, but the function fall of the water quality sensor 34 can be prevented.

  FIG. 7 is a diagram illustrating a flow of a fourth operation example for cleaning the electrodes, which is executed under the control of the control unit 17 in the electrolytically treated water generating apparatus 150. Also in the fourth operation example, first, from the normal operation, the three-way valve 33 switches the connection between the first electrolysis chamber 314 and the first flow path 351 to the connection between the first electrolysis chamber 314 and the drainage path 353. (Step S41). Thereafter, the pump 23 is stopped, and the liquid supplied to the electrolysis chambers 314 and 315 is changed from the electrolyte aqueous solution to water. As a result, the liquid in the electrolysis chambers 314 and 315 is replaced with service water (step S42).

  Next, the DC power supply 32 changes the voltage applied between the electrodes 312 and 313 to a reverse voltage (step S43). While the reverse voltage is being applied, the operation of the pump 23 is resumed, and the liquid supplied to the electrolysis chambers 314 and 315 is changed from water for use to an aqueous electrolyte solution. Thereby, the liquid in the electrolysis chambers 314 and 315 is replaced with the electrolyte aqueous solution (step S44).

  The reverse voltage is applied for a short time. In this embodiment, the reverse voltage is applied for about 30 seconds. The DC power source 32 resumes application of the normal voltage between the electrodes 312 and 313, and generation of treated water is started (step S45). At this time, similarly to the first operation example, the measurement value reference unit 171 repeatedly refers to the measurement value from the ammeter 35 (step S46), and the control unit 17 performs liquid discharge from the first electrolysis chamber 314. However, it is monitored whether it changed into treated water.

  When it is detected that the liquid discharged from the first electrolysis chamber 314 has changed to treated water, the three-way valve 33 connects the first electrolysis chamber 314 and the drainage channel 353, and connects the first electrolysis chamber 314 and the first electrolysis chamber 314. Switching to connection with one flow path 351 is performed. Thereby, the 1st electrolysis chamber 314 and the electrolysis treated water storage part 16 are connected, and it returns to normal operation (Step S47).

  Also in the fourth operation example, the liquid discharged from the first electrolysis chamber 314 is discarded by the three-way valve 33 when the reverse voltage is applied. Thereby, alkaline water is not guide | induced to the water quality sensor 34, but the function fall of the water quality sensor 34 can be prevented. By temporarily flowing the water into the electrolysis chamber, the consumption of the aqueous electrolyte solution can be reduced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible.

  In the electrolyzed water generator 150, hypochlorous acid water is generated as the electrolyzed water, but electrolyzed water outside the hypochlorous acid water may be generated. Alternatively, the first electrode 312 may be a cathode at a normal voltage, the first electrode 312 may be an anode at a reverse voltage, and alkaline water may be generated from the first electrolysis chamber 314 as electrolytically treated water. Furthermore, both acidic water and alkaline water may be taken from the first electrolysis chamber 314 and the second electrolysis chamber 315 as electrolytic treatment water.

  In the first to fourth operation examples, each process has been described in time series. However, in actuality, the liquid flows in the apparatus over time, so even if the adjacent processes are performed simultaneously, The same processing can be performed even if the order is reversed for a long time. Even such a case is substantially included in the process sequence of the present invention.

  The configurations in the above embodiment and each modification may be combined as appropriate as long as they do not contradict each other.

  The present invention can be used in technologies for generating various electrolytically treated water.

17 Control unit 32 DC power supply 33 Three-way valve (connection switching unit)
34 Water quality sensor 35 Ammeter 141 First supply unit 142 Second supply unit 150 Electrolyzed water generation device 171 Measurement value reference unit 311 Ion permeable diaphragm 312 First electrode 313 Second electrode 314 First electrolysis chamber 315 Second electrolysis chamber 341 Indicator electrode 342 Reference electrode 351 First channel 352 Second channel 353 Drainage channel

Claims (11)

A first electrolysis chamber;
A second electrolysis chamber;
An ion permeable membrane disposed between the first electrolysis chamber and the second electrolysis chamber;
A first electrode disposed in the liquid in the first electrolytic chamber;
A second electrode disposed in the liquid in the second electrolytic chamber;
A DC power source that selectively applies one of a normal voltage and a reverse voltage between the first electrode and the second electrode;
A first supply unit that supplies an aqueous electrolyte solution to the first electrolysis chamber, or selectively supplies one of water for use in generating the aqueous electrolyte solution and the aqueous electrolyte solution that has an electrolyte concentration lower than that of the aqueous electrolyte solution When,
A second supply unit for supplying the aqueous electrolyte solution to the second electrolysis chamber;
A first flow path;
A second flow path connected to the second electrolysis chamber;
A connection switching unit that switches connection between the first electrolysis chamber and the first flow path and connection between the first electrolysis chamber and the drainage channel;
A water quality sensor provided on the first flow path and configured to measure only acidic or alkaline liquid;
A control unit;
With
By the control of the control unit,
a) connecting the first electrolysis chamber and the first flow path, supplying the electrolyte aqueous solution to the first electrolysis chamber, and applying the normal voltage between the first electrode and the second electrode; Thus, the process of switching the connection between the first electrolysis chamber and the first flow path to the connection between the first electrolysis chamber and the drainage channel from the state in which treated water is discharged from the first electrolysis chamber. When,
b) after the step a), changing the voltage applied between the first electrode and the second electrode to the reverse voltage;
c) after the step b), changing the voltage applied between the first electrode and the second electrode to the normal voltage;
d) a step of monitoring whether the liquid discharged from the first electrolysis chamber has changed to the treated water after the step c);
e) In the step d), after detecting that the liquid discharged from the first electrolysis chamber has changed to the treated water, the connection between the first electrolysis chamber and the drainage channel is connected to the first electrolysis chamber. Switching to the connection between the electrolysis chamber and the first flow path;
An electrolyzed water generating device that executes By the control of the control unit,
f) After the step b) and before the step c), the application of voltage between the first electrode and the second electrode is stopped, and the liquid supplied to the first electrolysis chamber is allowed to flow into the electrolyte. Changing from an aqueous solution to the water;
g) after the step f) and before the step c), changing the liquid supplied to the first electrolysis chamber from the water to the aqueous electrolyte solution;
The electrolytic-process water production | generation apparatus of Claim 1 which performs further. By the control of the control unit,
h) after the step a), and before the step b), changing the liquid supplied to the first electrolysis chamber from the electrolyte aqueous solution to the water;
i) after the step b) and before the step c), stopping the application of voltage between the first electrode and the second electrode;
j) After the step i) and before the step c), changing the liquid supplied to the first electrolysis chamber from the water to the aqueous electrolyte solution;
The electrolyzed water generating apparatus according to claim 1, further comprising: By the control of the control unit,
k) after the step a) and before the step b), changing the liquid supplied to the first electrolysis chamber from the electrolyte aqueous solution to the irrigation water;
l) after the step b) and before the step c), changing the liquid supplied to the first electrolyte from the water to the aqueous electrolyte solution;
The electrolytic-process water production | generation apparatus of Claim 1 which performs further. As the electrolyte aqueous solution supplied to the first electrolysis chamber, saline is used,
The electrolyzed water generating apparatus according to any one of claims 1 to 4, wherein when the normal voltage is applied between the first electrode and the second electrode, the first electrode is an anode. An ammeter that measures a current flowing between the first electrode and the second electrode;
The control unit includes a measurement value reference unit that refers to a measurement value of the ammeter,
The electrolyzed water generating apparatus according to any one of claims 1 to 5, wherein in the step d), the control unit refers to a measurement value of the ammeter. The water quality sensor is
An indicator electrode which is a platinum electrode;
A reference electrode which is a silver / silver chloride electrode;
With
The electrolyzed water generating apparatus according to any one of claims 1 to 6, wherein the indicator electrode and the reference electrode directly touch a liquid flowing through the first flow path. A first electrolysis chamber;
A second electrolysis chamber;
An ion permeable membrane disposed between the first electrolysis chamber and the second electrolysis chamber;
A first electrode disposed in the liquid in the first electrolytic chamber;
A second electrode disposed in the liquid in the second electrolytic chamber;
A DC power source that selectively applies one of a normal voltage and a reverse voltage between the first electrode and the second electrode;
A first supply unit that supplies an aqueous electrolyte solution to the first electrolysis chamber, or selectively supplies one of water for use in generating the aqueous electrolyte solution and the aqueous electrolyte solution that has an electrolyte concentration lower than that of the aqueous electrolyte solution When,
A second supply unit for supplying the aqueous electrolyte solution to the second electrolysis chamber;
A first flow path;
A second flow path connected to the second electrolysis chamber;
A connection switching unit that switches connection between the first electrolysis chamber and the first flow path and connection between the first electrolysis chamber and the drainage channel;
A water quality sensor provided on the first flow path and configured to measure only acidic or alkaline liquid;
An electrolyzed water generating method in an electrolyzed water generating apparatus comprising:
a) connecting the first electrolysis chamber and the first flow path, supplying the electrolyte aqueous solution to the first electrolysis chamber, and applying the normal voltage between the first electrode and the second electrode; Thus, the process of switching the connection between the first electrolysis chamber and the first flow path to the connection between the first electrolysis chamber and the drainage channel from the state in which treated water is discharged from the first electrolysis chamber. When,
b) after the step a), changing the voltage applied between the first electrode and the second electrode to the reverse voltage;
c) after the step b), changing the voltage applied between the first electrode and the second electrode to the normal voltage;
d) a step of monitoring whether the liquid discharged from the first electrolysis chamber has changed to the treated water after the step c);
e) In the step d), after detecting that the liquid discharged from the first electrolysis chamber has changed to the treated water, the connection between the first electrolysis chamber and the drainage channel is connected to the first electrolysis chamber. Switching to the connection between the electrolysis chamber and the first flow path;
An electrolytically treated water generating method comprising: f) After the step b) and before the step c), the liquid supplied to the first electrolysis chamber is changed from the aqueous electrolyte solution to the water to be used, and between the first electrode and the second electrode. Stopping the application of voltage in
g) after the step f) and before the step c), changing the liquid supplied to the first electrolysis chamber from the water to the aqueous electrolyte solution;
The method for generating electrolytically treated water according to claim 8, further comprising: h) after the step a), and before the step b), changing the liquid supplied to the first electrolysis chamber from the electrolyte aqueous solution to the water;
i) after the step b) and before the step c), stopping the application of voltage between the first electrode and the second electrode;
j) After the step i) and before the step c), changing the liquid supplied to the first electrolysis chamber from the water to the aqueous electrolyte solution;
The method for generating electrolytically treated water according to claim 8, further comprising: k) after the step a) and before the step b), changing the liquid supplied to the first electrolysis chamber from the electrolyte aqueous solution to the irrigation water;
l) after the step b) and before the step c), changing the liquid supplied to the first electrolyte from the water to the aqueous electrolyte solution;
The method for generating electrolytically treated water according to claim 8, further comprising:

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