JP2021065865A - Electrolytic water generator - Google Patents

Abstract

To provide an electrolytic water generator capable of performing an appropriated number of times according to the temperature of raw water that constitutes electrolytic water by a batch electrolytic cleaning operation to remove a scale that adheres and accumulates in an electrolytic chamber, when the electrolytic water is supplied with hot water in an electrolytic cell.SOLUTION: An electrolytic water generator 10 performs a continuous electrolytic water production operation for continuously generating electrolytic water by electrolytic water to be electrolyzed continuously supplied to an electrolytic cell 20. Electrolysis is performed in a state in which the polarity of electrodes 22, 23 of each of electrolytic chambers 20a and 20b of the electrolytic cell 20 is reversed, and the water to be electrolyzed is stored in the electrolytic chambers 20a and 20b of the electrolytic cell 20. A batch electrolytic cleaning operation is controlled so that a batch electrolytic cleaning operation of reverse polarity for discharging electrolytic water generated by electrolysis is performed at a predetermined number of times according to the hardness of raw water, and the number of times of executing the batch electrolytic cleaning operation of reverse polarity is changed according to the temperature of the raw water.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electrolyzed water generator that generates electrolyzed water, and the electrolyzed water generator that at least executes a batch type electrolyzed cleaning operation of opposite polarity after executing a continuous electrolyzed water generation operation that continuously generates electrolyzed water. Regarding.

Patent Document 1 discloses an invention of an electrolyzed water generator. The electrolytic water generator consists of a diaphragmatic electrolytic cell in which a pair of electrodes are arranged, a raw water supply pipe that supplies raw water from a water supply source such as a water supply to the diaphragmatic electrolytic cell, and an electrolyte aqueous solution in the raw water supplied to the diaphragmatic electrolytic cell. An electrolyte aqueous solution supply pipe that supplies the electrolyte aqueous solution from the tank, a delivery pump that is interposed in the electrolyte aqueous solution supply pipe to send out the electrolyte aqueous solution, and an injection pipe that injects the electrolytic water generated in the diaphragmatic electrolytic cell. It is equipped with a power supply device that applies a DC voltage between the pair of electrodes.

When electrolyzed water is generated by this electrolyzed water generator, the electrolyzed water obtained by mixing the raw water supplied from the raw water supply pipe with the electrolyte aqueous solution supplied from the electrolytic chamber supply pipe is continuously supplied to each electrolytic chamber of the electrolytic tank. Then, the continuously supplied water to be electrolyzed is electrolyzed to continuously generate electrolyzed water. When electrolyzed water is generated by the electrolyzed water generator, scales caused by calcium ions and the like contained in the raw water for preparing the electrolyzed water adhere and accumulate in the electrolyzed chamber. When scale adheres and accumulates in the electrolysis chamber, the efficiency of the electrolysis operation for generating electrolyzed water decreases.

In order to prevent scale from adhering and accumulating in the electrolysis chamber, this electrolysis water generator enters each electrolysis chamber of the electrolysis tank when the cumulative time obtained by accumulating the time for generating electrolysis water reaches a predetermined predetermined cleaning timing. It is set to perform a batch-type electrolysis cleaning operation in which electrolysis is performed while the water to be electrolyzed is stored and the electrolysis water generated by the electrolysis is drained. In the batch-type electrolysis cleaning operation, the electrolysis generated by electrolysis is performed by electrolyzing the water to be electrolyzed in a state where the polarity of the electrodes in each electrolysis chamber of the electrolysis tank is reversed and the water to be electrolyzed is stored in each electrolysis chamber of the electrolysis tank. In the reverse polarity batch type electrolysis cleaning operation that drains water, and in the state where the water to be electrolyzed is stored in each electrolysis chamber of the electrolysis tank with the polarity of the electrodes in each electrolysis chamber of the electrolysis tank further reversed. This is a positive batch type electrolytic cleaning operation in which electrolysis is performed and the electrolyzed water generated by the electrolysis is drained.

Japanese Unexamined Patent Publication No. 2011-167671

In the electrolyzed water generator described in Patent Document 1, the scale that adheres and accumulates in the electrolyzed chamber adheres and accumulates when the hardness of the raw water sent from the water supply source for preparing the electrolyzed water is high. The number of reverse polarity and positive electrode batch type electrolytic cleaning operations is changed accordingly. Since the acidic electrolyzed water produced in the electrolytic cell of this type of electrolyzed water generator has high sterilizing power, the acidic electrolyzed water is used as washing water for sterilizing hands. When the temperature of the water supply source is low, such as in winter, the temperature of the acidic electrolyzed water generated by the electrolyzed water generator is also low. The user may hesitate to flush cold acidic electrolyzed water in his hand for a certain period of time or longer.

In order to solve this problem, if hot water supplied from a water heater such as a water heater is used as the raw water supplied to the electrolytic cell, the acidic electrolyzed water generated in the electrolytic cell can be warmed. However, when the electrolyzed water using warm water is supplied to the electrolyzing tank, the scale adhering and accumulating in the electrolyzing chamber adheres more than the electrolyzed water using normal temperature water, and the electrolyzed water using normal temperature water adheres more. If each batch type electrolytic cleaning operation is executed the same number of times as when the water is supplied, the scale adhering and accumulated in the electrolytic chamber may not be removed. In the present invention, when water to be electrolyzed using hot water is supplied to the electrolytic cell, a batch-type electrolyzed cleaning operation for removing scale adhering to and accumulating in the electrolyzing chamber is performed an appropriate number of times according to the temperature of the raw water constituting the water to be electrolyzed. The purpose is to be able to execute with.

In order to solve the above problems, the present invention continuously supplies water to be electrolyzed, which is a mixture of raw water supplied from a water supply source and an aqueous electrolyte solution, to the electrolytic chambers on the anode side and the cathode side partitioned by a diaphragm in the electrolytic tank. Then, after performing a continuous electrolysis water generation operation in which the continuously supplied water to be electrolyzed is electrolyzed to continuously generate electrolyzed water, the polarity of the electrodes in each electrolysis chamber of the electrolysis tank is reversed. In this state, the water to be electrolyzed is electrolyzed while being stored in each electrolysis chamber of the electrolytic tank, and the electrolyzed water generated by the electrolysis is drained. It is an electrolytic water generator controlled to execute the set number of times, and the number or length of executing the reverse polarity batch type electrolytic cleaning operation set according to the hardness of the raw water is changed according to the temperature of the raw water. It is an object of the present invention to provide an electrolyzed water generator characterized by the above.

In the electrolyzed water generator configured as described above, the number or length of performing the reverse polarity batch type electrolytic cleaning operation set according to the hardness of the raw water was changed according to the temperature of the raw water. For example, when the temperature of the raw water is high, scale is more likely to adhere to each electrolytic chamber than when the temperature of the raw water is low. Therefore, when the temperature of the raw water is high, the number of times of performing the reverse polarity batch type electrolytic cleaning operation is increased, or By increasing the length, it is possible to prevent scale from adhering and accumulating in each electrolytic chamber even if the temperature of the raw water is high.

In the electrolyzed water generator configured as described above, the reverse polarity batch type electrolytic cleaning operation is controlled to be executed a set number of times for each of a plurality of ranges of the hardness of the raw water, and the reverse polarity batch type electrolytic cleaning operation is performed. Multiple ranges of raw water hardness may be varied depending on the temperature of the raw water to determine the number of times to perform. In this case, the first plurality of ranges of the hardness of the raw water that determine the number of operations of the batch type electrolytic cleaning operation when the temperature of the raw water is in the first temperature range, and the temperature of the raw water from the first temperature range. A second plurality of ranges of raw water hardness may be set to determine the number of operations of the batch electrolytic cleaning operation when in the high second temperature range.

In the electrolyzed water generator configured as described above, a temperature sensor that detects the temperature of the raw water is interposed in the raw water supply pipeline that supplies the raw water to the electrolytic cell, and based on the temperature of the raw water detected by the temperature sensor. A plurality of ranges of the hardness of the raw water, which determines the number of operations of the batch type electrolytic cleaning operation, may be changed.

It is the schematic of the electrolyzed water generation apparatus of this invention. It is a block diagram of a control device. It is a graph which shows the correlation between the electrolytic current value of raw water and the electric conductivity of raw water (a), and is the graph which shows the correlation between the electric conductivity of raw water, and the hardness of raw water (b). It is a graph which shows the solubility of calcium carbonate with respect to temperature. It is a table showing the number of operations of the reverse polarity batch type electrolytic cleaning operation in the range of four hardnesses when the raw water at room temperature is used and when the raw water of warm water is used (a), and the raw water at room temperature is used. It is a table which shows the number of times of a positive electrode batch type electrolytic cleaning operation in the range of four hardnesses when and when using raw water of warm water (b). It is a flowchart when the electrolytic cleaning program is executed.

Hereinafter, an embodiment of the electrolyzed water generator of the present invention will be described with reference to the accompanying drawings. The electrolyzed water generator 10 of the present embodiment electrolyzes the electrolyzed water in the electrolytic cell 20 of the diaphragm to generate acidic electrolyzed water and alkaline electrolyzed water. The electrolyzed water generator 10 of the present embodiment uses the acidic electrolyzed water generated in the electrolytic cell 20a on the anode side in the electrolytic cell 20 for cleaning for the purpose of sterilizing the hands, and in particular, the electrolytic cell 20. In winter, the electrolyzed water using the raw water supplied from the water heater 31 is supplied to generate acidic electrolyzed water, and the generated acidic electrolyzed water is diluted with the hot water supplied from the water heater 31. It is possible to supply warm acidic electrolyzed water suitable for hand sterilization even when the water temperature is low.

Further, when the electrolyzed water generating device 10 reaches a predetermined cleaning timing set by the integrated time obtained by integrating the time for generating the electrolyzed water in the electrolyzing tank 20, the electrolyzed water is placed in the electrolyzed chambers 20a and 20b of the electrolyzing tank 20. It is set to perform a batch-type electrolysis cleaning operation in which electrolysis is performed in a state where the water is stored and the electrolyzed water generated by the electrolysis is drained. The electrolyzed water generator 10 will be described in detail below.

The electrolyzed water generator 10 includes an electrolytic cell 20 in a casing 11, and the electrolytic cell 20 electrolyzes the electrolyzed water to generate acidic electrolyzed water and alkaline electrolyzed water. A diaphragm 21 through which ions generated by electrolysis can pass is disposed in the electrolytic cell 20, and the inside of the electrolytic cell 20 is divided into two electrolytic chambers 20a and 20b consisting of an anode side and a cathode side by the diaphragm 21. Has been done. Electrodes 22 and 23 are arranged in each of the electrolytic cells 20a and 20b of the electrolytic cell 20, and the electrolyzed water supplied into each of the electrolysis chambers 20a and 20b applies a DC voltage between the electrodes 22 and 23. It is electrolyzed by this.

A raw water supply pipe 30 for supplying raw water constituting the water to be electrolyzed is connected to the electrolytic cell 20, and an electrolyte aqueous solution supply pipe 40 for supplying the electrolyte aqueous solution to the raw water is connected to the raw water supply pipe 30. There is. The raw water supply pipeline 30 is mainly composed of pipe members, and the introduction portion of the raw water supply pipeline 30 is connected to a water heater 31 such as a water heater. The lead-out portion of the raw water supply pipeline 30 includes branch portions 30a and 30b that branch into two, and the branch portions 30a and 30b are connected to the electrolytic cells 20a and 20b on the anode side and the cathode side of the electrolytic cell 20. .. The hot water generated by the water heater 31 is sent to the electrolytic cells 20a and 20b on the anode side and the cathode side of the electrolytic cell 20 through the raw water supply pipe line 30.

A water flow valve 32 is interposed in the raw water supply pipe line 30, and the hot water generated by the water heater 31 is sent to the electrolytic cell 20 through the raw water supply pipe line 30 by opening the water flow valve 32. A raw water temperature sensor 33 made of a thermistor is interposed in the raw water supply line 30 on the downstream side of the water passage valve 32, and the raw water temperature sensor 33 detects the temperature of hot water passing through the raw water supply line 30. .. A check valve 34 is interposed downstream of the raw water temperature sensor 33 in the raw water supply line 30, and the check valve 34 prevents hot water passing through the raw water supply line 30 from flowing back. A flow rate sensor 35 is interposed in the raw water supply line 30 on the downstream side of the check valve 34, and the flow rate sensor 35 detects the flow rate of hot water passing through the raw water supply line 30.

The water heater 31 includes a tank 31a for storing about 6 L of water as a predetermined amount, and a heater 31b for heating the water. A water supply pipe 36 to which water is supplied from a water supply source such as a water supply is connected to the tank 31a of the water heater 31. The water supplied from the water supply pipe 36 is heated by the heater 31b arranged in the tank 31a to become hot water, and the hot water is sent to the raw water supply pipe 30. Further, a water supply temperature sensor 37 is interposed in the water supply pipe 36, and the water supply temperature sensor 37 detects the temperature of the water sent from the water supply source.

The electrolyte aqueous solution supply line 40 supplies the electrolyte aqueous solution to the raw water passing through the raw water supply line 30, and the raw water passing through the raw water supply line 30 is supplied with the electrolyte solution from the electrolyte solution supply line 40 and is electrolyzed. It becomes water and is sent to the electrolytic cell 20. The electrolyte aqueous solution supply pipeline 40 is connected to the electrolyte aqueous solution tank 41 for storing the electrolyte aqueous solution composed of salt solution, and the electrolyte aqueous solution in the electrolyte aqueous solution tank 41 becomes the raw water passing through the electrolyte aqueous solution supply pipeline 40 and the raw water supply pipeline 30. Sent. A delivery pump 42 is interposed in the electrolyte aqueous solution supply pipe 40, and the electrolyte aqueous solution in the electrolyte aqueous solution tank 41 is sent to the raw water passing through the raw water supply pipe 30 by the operation of the delivery pump 42. A check valve 43 is interposed downstream of the delivery pump 42 in the electrolyte aqueous solution supply pipe 40, and the check valve 43 prevents the electrolyte aqueous solution passing through the electrolyte aqueous solution supply pipe 40 from flowing back. ..

The first and second injection pipelines 50 and 53 are connected to the electrolytic cells 20a and 20b on the anode side and the cathode side of the electrolytic cell 20. The electrolyzed water generator 10 of this embodiment uses the acidic electrolyzed water generated in the electrolyzed chamber 20a on the anode side for cleaning mainly for the purpose of sterilizing the hands, and is connected to the electrolyzed chamber 20a on the anode side. The first injection pipeline 50 extends to the outside of the casing 11. A three-way valve 51 is interposed in the first injection pipe line 50, and a drain pipe 52 is connected to the remaining one port of the three-way valve 51. The drain pipe 52 is for discharging the water discharged from the electrolytic chamber 20a on the anode side when the electrolytic cell 20 is washed.

The second injection pipe line 53 is connected to the electrolytic chamber 20b on the cathode side, and the second injection pipe line 53 is for pouring out the alkaline electrolyzed water generated in the electrolytic chamber 20b on the cathode side. .. The second injection pipe line 53 extends to the outside of the casing 11, and the alkaline electrolyzed water generated in the electrolytic chamber 20b on the cathode side is poured out to the outside of the casing 11 through the second injection pipe line 53. Is done. As described above, since the electrolyzed water generator 10 uses the acidic electrolyzed water generated in the electrolytic chamber 20a on the anode side for cleaning mainly for the purpose of sterilizing the hands, the electrolytic water chamber 20b on the cathode side is used. The generated alkaline electrolyzed water is discharged to the outside of the casing 11 through the second injection conduit 53.

The raw water supply pipeline 30 is provided with a branch portion 30c between the water flow valve 32 and the raw water temperature sensor 33, and the injection pipeline 50 is provided with a branch portion 50a on the downstream side of the three-way valve 51. The raw water supply pipe 30 and the injection pipe 50 are connected by a hot water supply pipe 60 between the branch portion 30c and the branch portion 50a. The hot water sent from the water heater 31 is added to the acidic electrolyzed water passing through the first injection pipe line 50 through the raw water supply pipe line 30 and the hot water supply pipe line 60. A flow rate adjusting valve 61 for adjusting the flow rate of hot water is interposed in the hot water supply line 60, and the hot water sent from the water heater 31 has a flow rate corresponding to the opening degree of the flow rate adjusting valve 61 and is a raw water supply line 30. And the acidic electrolyzed water passing through the pouring pipe line 50 through the hot water supply pipe line 60.

A power supply device 70 is connected to the electrodes 22 and 23, and the power supply device 70 applies a DC voltage between the electrodes 22 and 23 in the electrolytic cell 20 to electrolyze the water to be electrolyzed in the electrolytic cell 20. It is a thing. A current meter 71 is connected between the power supply device 70 and the electrode 22, and the current meter 71 measures the current flowing through the wiring connecting the power supply device 70 to the electrode 22 to measure the electrolytic current flowing through the electrolytic cell 20. Is to be measured. A voltmeter 72 is connected between the electrodes 22 and 23, and the voltmeter 72 measures the electrolytic voltage of the electrolytic cell 20 by measuring the voltage applied to the electrodes 22 and 23.

As shown in FIG. 2, the electrolyzed water generator 10 includes a control device 80, and the control device 80 includes a water heater 31, a water flow valve 32, a raw water temperature sensor 33, a flow rate sensor 35, and a water supply temperature sensor 37. It is connected to a delivery pump 42, a three-way valve 51, a flow control valve 61, a power supply device 70, an ammeter 71, and a voltmeter 72. The control device 80 includes a microcomputer (not shown), and the microcomputer includes a CPU, RAM, ROM, and a timer (all of which are not shown) connected via a bus.

The control device 80 continuously supplies the electrolyzed water into the electrolyzed tank 20 to the ROM, and electrolyzes the continuously supplied electrolyzed water to continuously generate the electrolyzed water. It has an electrolyzed water generation program that executes the operation. This electrolyzed water generation operation program is executed by turning on the pouring switch provided on the casing 11 or detecting a pouring sensor (both not shown) that detects the hand held up.

When the control device 80 executes the continuous electrolyzed water generation operation by the electrolyzed water generation program, the water flow valve 32 is opened in a predetermined time according to the amount of one injection, and the flow rate sensor 35 detects the flow rate and the current. The delivery pump 42 is operated according to the current measured by the total 71 and the voltage measured by the voltmeter 72. The raw water composed of hot water sent from the water heater 31 flows into the electrolyte aqueous solution sent from the delivery pump 42 in the process of passing through the raw water supply pipe 30, and becomes the electrolyzed water into the electrolytic cells 20a and 20b of the electrolytic cell 20. Sent continuously. The electrolyzed water sent to the electrolyzed chambers 20a and 20b of the electrolytic tank 20 is electrolyzed by the DC current flowing between the power supply device 70 and the electrodes 22 and 23, and chlorine ions are hypochlorinated in the electrolytic chamber 20a on the anode side. It becomes an acid, and acidic electrolyzed water having a pH of 2 to 6, preferably pH 5, and an effective chlorine concentration of 10 to 100 ppm, preferably 50 ppm is continuously generated, and in the electrolysis chamber 20b on the cathode side, alkaline electrolyzed water having a pH of 11 to 12 is continuously produced. Is generated in.

The acidic electrolyzed water generated in the electrolytic chamber 20a on the anode side is sent to the first injection pipe line 50, and the alkaline electrolyzed water generated in the electrolytic chamber 20b on the cathode side is sent to the second injection pipe line 53. At this time, the flow rate adjusting valve 61 interposed in the hot water supply pipeline 60 is opened at an opening degree corresponding to the detected flow rate of the flow rate sensor 35 interposed in the raw water supply pipeline 30, and passes through the first injection pipeline 50. Hot water sent from the hot water supply pipe 60 is added to the acidic electrolyzed water to be diluted, and warm acidic electrolyzed water is poured out from the first pouring pipe 50. The flow rate adjusting valve 61 is controlled so that the flow rate is 1.5 to 4 times higher than the flow rate of the acidic electrolyzed water passing through the injection pipe line 50.

The control device 80 includes an electrolytic cleaning program that executes a batch-type electrolytic cleaning operation for removing scale adhering to and accumulating in the electrolytic cells 20a and 20b of the electrolytic cell 20 in the ROM. The electrolytic cleaning program executes a reverse-polarity batch-type electrolytic cleaning operation a set number of times for each hardness range of raw water (shown in I to IV of FIG. 5 (a)), and then performs a positive-electrode batch-type batch operation. The electrolytic cleaning operation is executed a set number of times for each hardness range of raw water (shown in I to IV of FIG. 5 (b)).

In the reverse polarity batch type electrolysis cleaning operation, the water flow valve 32 and the delivery pump 42 are opened for a certain period of time to supply the electrolyzed water to the electrolyzed chambers 20a and 20b of the electrolytic tank 20 and then store the water to be electrolyzed. In a state where the polarities of the electrodes 22 and 23 of the electrolyzed chambers 20a and 20b of the tank 20 are reversed, the water to be electrolyzed is energized for a predetermined energizing time to electrolyze. By opening the three-way valve 51 to the drain pipe 52 side after waiting for a predetermined standby time after electrolysis, each electrolyzed water generated in each of the electrolytic chambers 20a and 20b is discharged to the drain pipe 52 and the second injection pipe. Drain from road 53.

In the positive electrode batch type electrolytic cleaning operation, the water flow valve 32 and the delivery pump 42 are opened for a certain period of time to supply the electrolyzed water to the electrolytic chambers 20a and 20b of the electrolytic tank 20 and then store the water to be electrolyzed. The polarities of the electrodes 22 and 23 of the electrolytic chambers 20a and 20b of the tank 20 are reversed again, that is, the water to be electrolyzed is energized for a predetermined energization time in a state of returning to the positive electrode to electrolyze. By opening the three-way valve 51 to the drain pipe 52 side after waiting for a predetermined standby time after electrolysis, each electrolyzed water generated in each of the electrolytic chambers 20a and 20b is discharged to the drain pipe 52 and the second injection pipe. Drain from 53.

This batch-type electrolyzed cleaning operation is controlled so as to be executed when the integrated time, which is the sum of the times during which the continuous electrolyzed water generation operation by the electrolyzed water generation program is executed, reaches a predetermined cleaning timing. Further, the batch type electrolytic cleaning operation is controlled to be executed a set number of times for each range of hardness of the raw water (shown in I to IV of FIGS. 5A and 5B), and the temperature of the raw water is controlled. The range of hardness of the raw water is changed according to the above. The hardness of the raw water is determined by using the graph shown in FIG. 3A to determine the electrolytic current value obtained by electrolyzing the raw water when the electrolyzed water generator 10 is installed in a kitchen, medical facility, or the like. The conductivity is obtained, and the hardness of the raw water can be obtained from the obtained electrical conductivity using the graph shown in FIG. 3 (b). As described above, the hardness of the raw water is obtained from the electrolytic current value of the raw water via the electric conductivity of the raw water.

FIG. 4 is a graph showing the solubility of calcium carbonate, which is a component of scale, with respect to temperature. At 30 ° C., which assumes the maximum temperature of raw water supplied at room temperature, the solubility of calcium carbonate is 60 ppm, and the solubility of calcium carbonate is 60 ppm from the water heater 31. At 40 ° C., which assumes the maximum temperature of the raw water consisting of the supplied hot water, the solubility of calcium carbonate is 50 ppm, and it can be understood that the higher the temperature of the raw water, the lower the solubility of calcium carbonate.

FIG. 5 shows the number of operations of the reverse polarity and positive electrode batch type electrolytic cleaning operation in the hardness range of the raw water, and the number of times of executing the reverse polarity batch type electrolytic cleaning operation set according to the hardness of the raw water. Is changed according to the temperature of the raw water. The hardness range of the raw water, which sets the number of operations of the reverse polarity and positive electrode batch type electrolytic cleaning operation, is set to be lower when the temperature of the raw water is higher than the room temperature than when the temperature of the raw water is normal temperature. That is, as shown in FIG. 5, the number of operations of the reverse polarity batch type electrolytic cleaning operation set for each hardness range of the raw water is 0 to 149 mg / L at room temperature (I shown in FIG. 5A). 2 times, 150-299 mg / L (shown in II of FIG. 5 (a)) 5 times, 300-449 mg / L (shown in III of FIG. 5 (a)) 8 times, 450 mg / It is set to 11 times for L or more (shown by IV in FIG. 5 (a)), and 0 to 99 mg / L for warm water (for example, 40 °, but not limited to this) (Fig. 5). 5 (a) shown in I) twice, 100-199 mg / L (shown in FIG. 5 (a) II) 5 times, 200-299 mg / L (shown in FIG. 5 (a) III) () Is set to 8 times, and 300 mg / L or more (shown by IV in FIG. 5 (a)) is set to 11 times.

Similarly, the number of operations of the positive electrode batch type electrolytic cleaning operation set for each hardness range of the raw water is 0 to 149 mg / L (indicated by I in FIG. 5 (b)) at room temperature, 150 times. ~ 299 mg / L (shown in II of FIG. 5 (b)) twice, 300 to 449 mg / L (shown in III of FIG. 5 (b)) three times, 450 mg / L or more (FIG. 5 (b)) ) Is set to 4 times, and in warm water (for example, 40 °, but not limited to this), 0 to 99 mg / L (I in FIG. 5 (b)). (Shown) once, 100-199 mg / L (shown in II of FIG. 5 (b)) twice, 200-299 mg / L (shown in III of FIG. 5 (b)) three times, 300 mg It is set to 4 times at / L or more (indicated by IV in FIG. 5 (b)).

Information on the hardness of the above-mentioned raw water and the temperature of the raw water supplied to the electrolytic cell 20, that is, the electrolyzed water using the raw water at room temperature is supplied to the electrolytic cell 20, or the raw water produced by the hot water sent from the water heater 31 is used. By setting in advance whether to supply the used electrolyzed water at the time of installing the electrolyzed water generator 10, the number of operations of the reverse polarity and positive electrode batch type electrolyzed cleaning operation in the hardness range of the raw water is determined.

When the integrated time, which is the sum of the times during which the continuous electrolyzed water generation operation by the electrolyzed water generation program is executed, reaches a predetermined cleaning timing, the control device 80 executes the batch type electrolyzed cleaning operation by the electrolytic cleaning program. As shown in FIG. 6, in the batch type electrolytic cleaning operation, the control device 80 first executes the reverse polarity batch type electrolytic cleaning operation in step 101. The control device 80 determines whether or not the number of operations of the reverse polarity batch type cleaning operation set for each hardness range of the raw water has been executed in step 102, and if the number of operations does not reach the set number of operations, the step Return to 101.

The control device 80 repeatedly executes the process of step 101 and the NO determination process in step 102 until the set number of operations is reached, and YES when the number of operations of the reverse polarity batch type cleaning operation reaches the set number of operations. It is determined that the process proceeds to step 103. The control device 80 executes a positive electrode batch type electrolytic cleaning operation in step 103. After the process of step 103, the control device 80 determines whether or not the number of operations of the positive electrode batch type cleaning operation set for each hardness range of the raw water has been executed in step 104, and determines whether or not the operation number of operations is executed. If not, the process returns to step 103. The control device 80 executes the process of step 103 and the NO determination process in step 104 until the set number of operations is reached, and when the number of positive batch-type cleaning operations is the set number of operations, YES. Judge and end the electrolytic cleaning program.

In the electrolyzed water generator 10 configured as described above, the electrolyzed chambers 20a on the anode side and the cathode side, in which the electrolyzed water obtained by mixing the raw water supplied from the water supply source with the electrolyte aqueous solution is partitioned by the diaphragm 21 in the electrolytic tank 20. After executing the continuous electrolyzed water generation operation in which the water to be continuously supplied is continuously supplied to 20b and the continuously supplied water to be electrolyzed is electrolyzed to continuously generate the electrolyzed water, the continuous electrolyzed water generation operation is performed. When the integrated time, which is the sum of the executed times, reaches a predetermined cleaning timing, the batch type electrolytic cleaning operation having the opposite polarity is controlled to be executed.

When the control device 80 of the electrolyzed water generator 10 executes a batch-type electrolysis cleaning operation having a reverse polarity, the water to be electrolyzed is subjected to a state in which the polarities of the electrodes 22 and 23 of the electrolytic chambers 20a and 20b of the electrolytic tank 20 are reversed. The electrolysis is performed in a state of being stored in each of the electrolytic chambers 20a and 20b of the electrolytic tank 20, and the electrolytic water generated by the electrolysis is controlled to be drained. The control device 80 controls to execute the reverse polarity and positive electrode batch type electrolytic cleaning operation at a set number of times for each range of the hardness of the raw water, and executes the reverse polarity and positive electrode batch type electrolytic cleaning operation. The range of hardness of the raw water that determines the number of times to do is changed according to the temperature of the raw water.

Specifically, as shown in FIG. 5, the range of hardness of the raw water (shown in I to IV of FIG. 5) for setting the number of operations of the reverse polarity and positive electrode batch type electrolytic cleaning operation is the temperature of the raw water. Is set to be lower in warm water, which is higher than normal temperature, compared to normal temperature. As a result, the higher the temperature of the raw water, the smaller the range of hardness of the raw water, and the higher the temperature of the raw water, the more times the batch type electrolytic cleaning operation of the opposite polarity can be executed. It is possible to prevent scale from adhering and accumulating in the electrolytic chambers 20a and 20b.

In this embodiment, the first plurality of ranges of the hardness of the raw water, which determines the number of operations of the batch type electrolytic cleaning operation when the temperature of the raw water is 10 ° C. to 30 ° C. such as room temperature as the first temperature range. A second plurality of ranges of the hardness of the raw water, which determines the number of operations of the batch type electrolytic cleaning operation when the temperature of the raw water is at 31 ° C. to 40 ° C. as the second temperature range, are set. In this way, when the electrolyzed water using the raw water composed of the hot water sent out from the water heater 31 is supplied to the electrolytic cell 20, a batch type is performed according to the number of times set by the hardness of the raw water included in the second plurality of ranges. When the number of times of the electrolytic cleaning operation is set and the electrolyzed water using raw water consisting of water at room temperature which is not passed through the water heater 31 or is not heated through the water heater 31 is supplied to the electrolytic cell 20, the first The number of operations of the batch type electrolytic cleaning operation is set by the number of times set by the hardness of the raw water included in the plurality of ranges of 1.

It should be noted that the first plurality of ranges of the hardness of the raw water, which determines the number of operations of the batch type electrolytic cleaning operation when the temperature of the raw water is in the first temperature range, and the first temperature range in which the temperature of the raw water is higher than the first temperature range. The raw water is supplied to the electrolytic tank 20 without being limited to the one in which the second plurality of ranges of the hardness of the raw water that determine the number of operations of the batch type electrolytic cleaning operation when the temperature is in the temperature range of 2 are set. A raw water temperature sensor (temperature sensor) 33 that detects the temperature of raw water is used in the raw water supply pipeline 30, and the number of operations of the batch type electrolytic cleaning operation is determined based on the temperature of the raw water detected by the raw water temperature sensor 33. Multiple ranges of hardness may be varied.

In the above embodiment, the number of times of executing the reverse polarity batch type electrolytic cleaning operation set according to the hardness of the raw water is increased according to the temperature of the raw water, but the present invention is not limited to this. The length of time for executing the reverse polarity batch type electrolytic cleaning operation may be lengthened according to the temperature of the raw water.

10 ... Electrolyzed water generator, 20 ... Electrolytic cell, 22, 23 ... Electrodes, 30 ... Raw water supply pipeline, 33 ... Temperature sensor (raw water temperature sensor).

Claims (4)

Electrolyzed water obtained by mixing an aqueous electrolyte solution with raw water supplied from a water supply source is continuously supplied to the electrolyzed chambers on the anode side and the cathode side partitioned by a diaphragm in the electrolytic tank, and the water to be electrolyzed is continuously supplied. After performing a continuous electrolyzed water generation operation that continuously generates electrolyzed water by electrolyzing
The electrolyzed water is electrolyzed while being stored in each electrolysis chamber of the electrolysis tank in a state where the polarity of the electrodes in each electrolysis chamber of the electrolysis tank is reversed, and the electrolysis water generated by the electrolysis is drained. This is an electrolytic water generator in which the reverse polarity of the batch type electrolytic cleaning operation is controlled to be executed a set number of times according to the hardness of the raw water.
An electrolyzed water generator characterized in that the number or length of execution of the reverse polarity batch type electrolytic cleaning operation set according to the hardness of the raw water is changed according to the temperature of the raw water. In the electrolyzed water generator according to claim 1,
The reverse polarity batch type electrolytic cleaning operation is controlled to be executed a set number of times for each of a plurality of ranges of hardness of the raw water.
An electrolyzed water generator, characterized in that a plurality of ranges of hardness of the raw water for determining the number of times of performing the reverse polarity batch type electrolytic cleaning operation are changed according to the temperature of the raw water. In the electrolyzed water generator according to claim 2.
A first plurality of ranges of hardness of the raw water, which determines the number of operations of the batch type electrolytic cleaning operation when the temperature of the raw water is in the first temperature range, and
A second plurality of ranges of the hardness of the raw water, which determines the number of operations of the batch type electrolytic cleaning operation when the temperature of the raw water is in the second temperature range higher than the first temperature range, are set. An electrolyzed water generator characterized by this. In the electrolyzed water generator according to claim 2 or 3.
A temperature sensor that detects the temperature of the raw water is installed in the raw water supply pipeline that supplies the raw water to the electrolytic cell.
An electrolyzed water generator characterized in that a plurality of ranges of hardness of the raw water for determining the number of operations of the batch type electrolytic cleaning operation are changed based on the temperature of the raw water detected by the temperature sensor.

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