JP6917280B2 - Electrolyzed water generator - Google Patents

Description

The present invention relates to an electrolyzed water generator that produces electrolyzed water, and more particularly to an electrolyzed water generator that produces slightly acidic electrolyzed water.

Patent Document 1 discloses an invention of an electrolyzed water generator that generates slightly acidic electrolyzed water. This electrolytic cell generator includes an electrolytic cell in which a pair of electrodes are arranged, a raw water supply pipeline that supplies raw water supplied from a water supply source such as a water supply to the electrolytic cell, and sodium chloride in the raw water supplied to the electrolytic cell. It is equipped with a sodium chloride aqueous solution addition pump that supplies a sodium chloride aqueous solution from an aqueous solution storage tank, a hydrochloric acid aqueous solution pump that supplies a hydrochloric acid aqueous solution to raw water from a hydrochloric acid aqueous solution storage tank, and a power supply device that applies a DC voltage to a pair of electrodes. .. In this electrolyzed water generator, the electrolyzed water obtained by mixing the sodium chloride aqueous solution and the hydrochloric acid aqueous solution supplied from the sodium chloride aqueous solution addition pump and the hydrochloric acid aqueous solution pump with the raw water supplied from the raw water supply pipeline is supplied to the electrolyzed tank. The electrolyzed water is electrolyzed by the DC voltage applied from the power supply device to the pair of electrodes to become slightly acidic electrolyzed water.

Japanese Unexamined Patent Publication No. 5-237478

In the electrolyzed water generator of Patent Document 1 described above, it is necessary that the characteristics of the slightly acidic electrolyzed water to be generated are pH 5.0 to 6.5 and the effective chlorine concentration is 10 to 80 ppm. In this electrolyzed water generator, the electrolyzed water obtained by adding an aqueous solution of sodium chloride and an aqueous solution of hydrochloric acid to the raw water supplied to the raw water supply pipeline is electrolyzed. The current and voltage when electrolyzing are adjusted based on intuition and experience. However, even if the current and voltage are adjusted according to the properties and temperature of the raw water, it may be difficult for the slightly acidic electrolyzed water to have the above-mentioned characteristics, and it is troublesome to set the current and voltage only by intuition and experience. An object of the present invention is to generate slightly acidic electrolyzed water satisfying the required characteristics by allowing an appropriate voltage and current to flow through the electrolyzed water without relying on intuition or experience.

In order to solve the above problems, the present invention uses an electrolytic tank in which a pair of electrodes are arranged, a raw water supply pipeline for supplying raw water supplied from a water supply source to the electrolytic tank, and raw water supplied to the electrolytic tank. It includes an electrolyte aqueous solution supply pipeline that supplies at least an electrolyte aqueous solution containing hydrochloric acid, a power supply device that applies a DC voltage to the electrodes, and a control device that controls the operation of the power supply device. The control device is supplied from the raw water supply pipeline. Electrolysis control program that generates slightly acidic electrolyzed water by electrolyzing the water to be electrolyzed, which is a mixture of the raw water to be electrolyzed and the electrolyte aqueous solution supplied from the electrolyte aqueous solution supply pipeline, by applying a DC voltage to the electrodes by the power supply device. In the electrolysis control program, the set current and set voltage for electrolyzing the water to be electrolyzed are slightly acidic electrolyzed water with a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm. Provided is an electrolyzed water generator characterized in that it is set according to the alkalinity of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution so as to satisfy the required characteristics.

In the electrolyzed water generator configured as described above, the electrolysis control program sets the set current and set voltage for electrolyzing the electrolyzed water to be slightly acidic electrolyzed water with a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 10. Since it is set according to the alkalinity of the raw water and the hydrochloric acid concentration of the electrolyte aqueous solution so as to satisfy the required characteristics of 80 ppm, the alkalinity of the raw water and the electrolyte are not set by the current or voltage set based on the knowledge and experience of the water to be electrolyzed. By electrolyzing with a set current and a set voltage according to the hydrochloric acid concentration of the aqueous solution, the required characteristics of the slightly acidic electrolyzed water having a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm can be satisfied. It became so. Further, in the electrolyzed water generator configured as described above, the electrolyte aqueous solution supply pipeline is provided with a delivery means for delivering the electrolyte aqueous solution to the electrolytic cell, and the control device changes the flow rate of the electrolyte aqueous solution delivered by the delivery means. It is preferable to control the current so as to reach the set current.

In the electrolyzed water generator configured as described above, at least one of the set current and the set voltage of the electrolysis control program can be changed according to the pH and effective chlorine concentration of the slightly acidic electrolyzed water to be generated. preferable. In this case, even when the pH and effective chlorine concentration of the slightly acidic electrolyzed water generated by the characteristics of the electrodes deviate from the required characteristics of pH 5.0 to 6.5 and the effective chlorine concentration of 10 to 80 ppm, electrolysis control is performed. By changing at least one of the set current and the set voltage of the program, the slightly acidic electrolyzed water produced can satisfy the required characteristics of pH 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm.

In the electrolyzed water generator configured as described above, it is preferable that at least one of the set current and the set voltage of the electrolysis control program can be changed according to the properties of the slightly acidic electrolyzed water to be generated. In this case, even when the properties of the slightly acidic electrolyzed water generated by the characteristics of the electrodes deviate from the required characteristics of pH 5.0 to 6.5 and the effective chlorine concentration of 10 to 80 ppm, the set current of the electrolysis control program By changing at least one of the set voltage and the set voltage, the slightly acidic electrolyzed water produced can satisfy the required characteristics of pH 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm.

In the electrolyzed water generator configured as described above, at least one of the set current and the set voltage of the electrolysis control program can be changed according to the pH and effective chlorine concentration of the slightly acidic electrolyzed water to be generated. Therefore, it is preferable that at least one of the set current and the set voltage changed according to the pH and the effective chlorine concentration of the slightly acidic electrolyzed water produced is changed according to the temperature of the raw water or the electrolyzed water. In this case, only changing at least one of the set current and the set voltage of an arbitrary temperature changes at least one of the set current and the set voltage of the other temperature according to the temperature of the raw water or the electrolyzed water. Therefore, it is not necessary to change at least one of the set current and the set voltage at other temperatures, and the convenience of the operation of changing the set current and the set voltage of the electrolytic control program is improved.

It is the schematic of the electrolyzed water generator. It is a block diagram of a control device. It is a table which shows the hydrochloric acid concentration of an aqueous electrolyte solution, the M alkalinity of raw water, and the current and voltage set by the water temperature of raw water.

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 invention generates slightly acidic electrolyzed water by electrolyzing the electrolyzed water in an electrolytic cell 11 having no diaphragm, and particularly has a pH of 5.0 to 6.5 and an effective chlorine concentration. It produces 10 to 80 ppm of slightly acidic electrolyzed water. The electrolytic cell 10 is an electrolytic cell 11, a raw water supply line 20 for supplying raw water to the electrolytic cell 11, an electrolyte aqueous solution supply line 30 for supplying an electrolyte aqueous solution containing hydrochloric acid in the raw water, and an electrode of the electrolytic cell 11. It is provided with a power supply device 40 that applies a DC voltage to 12a and 12b.

The electrolytic cell 11 electrolyzes the water to be electrolyzed. The electrolytic cell 11 is a one-chamber type non-diaphragm electrolytic cell, and a pair of electrodes 12a and 12b are arranged in the electrolytic cell 11. The electrolytic cell 11 is connected to a raw water supply pipe 20 for supplying raw water from a water supply source such as water supply and a pouring pipe 13 for pouring out slightly acidic electrolyzed water generated in the electrolytic cell 11.

A pressure reducing valve 21 and a water flow valve 22 are interposed in the raw water supply pipe line 20. The pressure of the raw water sent from the water supply source is reduced by the pressure reducing valve 21, and the raw water is supplied to the electrolytic cell 11 by opening the water flow valve 22. Further, a temperature sensor 23 and a flow meter 24 are interposed in the raw water supply line 20, the temperature sensor 23 detects the temperature of the raw water passing through the raw water supply line 20, and the flow meter 24 detects the temperature of the raw water passing through the raw water supply line 20. The flow rate of raw water passing through 20 is detected. An alkalinity measuring device may be provided in the raw water supply pipeline 20 to measure the M alkalinity of the raw water with the alkalinity measuring device.

An electrolyte aqueous solution supply pipe 30 is connected to the raw water supply pipe 20. The electrolyte aqueous solution supply pipe 30 supplies the electrolyte aqueous solution from the electrolyte aqueous solution tank 31 to the raw water supply pipe 20. The electrolyte aqueous solution stored in the electrolyte aqueous solution tank 31 contains at least hydrochloric acid, and in this embodiment, hydrochloric acid is prepared to have a predetermined concentration in a saturated sodium chloride aqueous solution. A delivery pump (delivery means) 32 is interposed in the electrolyte aqueous solution supply pipeline 30, and the electrolyte aqueous solution in the electrolyte aqueous solution tank 31 passes through the electrolyte aqueous solution supply pipeline 30 by the operation of the delivery pump 32 and is a raw water supply pipeline. Sent to 20. The delivery pump 32 is a variable flow rate pump, and the flow rate is adjusted by the number of strokes of the pump by a pulse signal. As the electrolyte aqueous solution in the electrolyte aqueous solution tank 31, an electrolyte aqueous solution having a hydrochloric acid concentration that differs depending on the M alkalinity of the raw water is used. Specifically, when the M alkalinity of the raw water is 20 to 40 ppm, an aqueous electrolyte solution having a hydrochloric acid concentration of 0.8 wt% is used, and when the M alkalinity of the raw water is 40 to 60 ppm, an aqueous electrolyte solution having a hydrochloric acid concentration of 1.0 wt% is used. When the M alkalinity of the raw water is 60 to 80 ppm, an aqueous electrolyte solution having a hydrochloric acid concentration of 1.2 wt% is used.

The power supply device 40 applies a DC voltage to the electrodes 12a and 12b in the electrolytic cell 11 to electrolyze the water to be electrolyzed in the electrolytic cell 11. A current meter 41 is connected between the power supply device 40 and the electrode 12a, and the current meter 41 measures the current flowing through the wiring connecting the power supply device 40 to the electrode 12a, whereby the electrolytic current flowing through the electrolytic cell 11 is measured. Is to be measured. A voltmeter 42 is connected between the electrodes 12a and 12b, and the voltmeter 42 measures the electrolytic voltage of the electrolytic cell 11 by measuring the voltage applied to the electrodes 12a and 12b.

The electrolyzed water generator 10 includes an operation panel 50, and the operation panel 50 is provided with a display panel and operation buttons (both not shown). The display panel can display the temperature of the raw water detected by the temperature sensor 23, the current measured by the ammeter 41, the voltage measured by the voltmeter 42, and the like. In addition, various operation buttons are used for pouring slightly acidic electrolyzed water, switching the display on the display panel, inputting the M alkalinity of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution.

As shown in FIG. 2, the electrolytic water generator 10 includes a control device 60, and the control device 60 includes a water passage valve 22, a temperature sensor 23, a voltmeter 24, a delivery pump 32, a power supply device 40, and an ammeter. 41, connected to the voltmeter 42 and the operation panel 50. The control device 60 includes a microcomputer (not shown), and the microcomputer includes a CPU, a RAM, a ROM, and a timer (all of which are not shown) connected via a bus. The control device 60 includes an electrolysis control program for generating slightly acidic electrolyzed water in the ROM, and as shown in FIG. 3, the electrolysis control program sets a current and a set voltage for electrolyzing the electrolyzed water. Is set according to the M alkalinity (alkalinity) of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution so as to satisfy the required characteristics of the slightly acidic electrolyzed water. Further, the set current and the set voltage of the electrolysis control program are set not only according to the alkalinity of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution, but also according to the temperature of the raw water. For the set current and set voltage not described in the hydrochloric acid concentration of the aqueous electrolyte solution, the alkalinity and temperature of the raw water shown in FIG. 3, linear interpolation values of the values on both sides described are used.

The generation of slightly acidic electrolyzed water using the electrolysis control program in the electrolyzed water generator 10 will be described. When the electrolyzed water generator 10 is installed, the M alkalinity of the raw water measured at the installation location in the electrolysis control program of the control device 60 and the hydrochloric acid concentration of the electrolyte aqueous solution corresponding to the M alkalinity of the raw water are determined by operating various operation buttons. Enter it. When the pouring operation button on the operation panel 50 is pushed, the water flow valve 22 is opened, and the raw water of the water supply source is supplied to the electrolytic cell 11 through the raw water supply pipe line 20. Further, as described above, in order to satisfy the required characteristics of the slightly acidic electrolyzed water, the M alkalinity of the raw water input in advance, the hydrochloric acid concentration of the electrolyte aqueous solution, and the set current and the set voltage based on the water temperature detected by the temperature sensor 23 are used. The control device 60 controls the application of the voltage to the electrode 12a by the power supply device 40 so that the voltage measured by the voltmeter 42 becomes the set voltage, and the current measured by the voltmeter 41 is the set current. The flow rate of the aqueous electrolyte solution is controlled by the delivery pump 32 so as to be.

The water to be electrolyzed supplied into the electrolytic cell 11 is electrolyzed by the DC current flowing between the electrodes 12a and 12b from the power supply device 40, the chlorine ion becomes hypochlorous acid on the anode side, and sodium ion and water on the cathode side. Sodium hydroxide and hydrogen gas are generated by the reaction of. Further, the sodium hydroxide generated on the cathode side is neutralized by hydrochloric acid contained in the electrolyzed water, and the generated electrolyzed water has a pH of 5.0 to 6.5 as a whole. As described above, the electrolyzed water produced by the electrolyzed water generator 10 is a slightly acidic electrolyzed water having a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm.

Even if the water to be electrolyzed is electrolyzed with the set current and set voltage of the electrolysis control program, the properties of the slightly acidic electrolyzed water generated are required by the electrode characteristics of the electrodes 12a and 12b arranged in the electrolytic cell 11 as described above. Sometimes it does not meet the characteristics. In this case, the set current and the set voltage shown in FIG. 3 can be changed by the operation buttons so that the properties of the generated slightly acidic electrolyzed water satisfy the above-mentioned required characteristics. Further, when changing the set current and set voltage at the temperature of raw water when you are actually used, so that the set current and set voltage at other temperatures are strange exposed in accordance with the temperature of raw water .. The set current and set voltage for electrolyzing the water to be electrolyzed in the transmission chamber 11 are set according to the M alkalinity of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution, but the M alkalinity of the raw water almost fluctuates. However, the hydrochloric acid concentration of the aqueous electrolyte solution was prepared according to the M alkalinity of the raw water. On the other hand, since the detected water temperature of the temperature sensor 23 fluctuates according to the season and time, other temperatures can be obtained simply by changing the set current and the set voltage according to the temperature of the raw water during actual use. It can now electrolysis to be electrolyzed water at the set current and setting because voltage is also changed in accordance with the temperature of the raw water, a suitable set current and set voltage at all temperatures at.

In the electrolyzed water generator 10 configured as described above, the electrolysis control program has a set current and a set voltage for electrolyzing the water to be electrolyzed: pH 5.0 to 6.5 of slightly acidic electrolyzed water, and an effective chlorine concentration of 10. It is set according to the M alkalinity (alkalinity) of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution so as to satisfy the required characteristics of ~ 80 ppm. As a result, the slightly acidic substance generated by electrolyzing with the set current and set voltage according to the alkalinity of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution, instead of the current and voltage set by intuition and experience with the water to be electrolyzed. It has become possible to meet the required characteristics of electrolyzed water. The M alkalinity of the raw water is measured by an alkalinity measuring device, and the electrolyzed water is electrolyzed at a set current and a set voltage according to the measured M alkalinity and the input hydrochloric acid concentration. May be good.

In addition, the set current and set voltage of the electrolysis control program are set according to the alkalinity of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution, as well as the temperature of the raw water. It is electrolyzed with a set current and a set voltage set by the water temperature detected by the sensor 23 to become slightly acidic electrolyzed water. As a result, the electrolyzed water is electrolyzed with the set current and set voltage according to the temperature of the raw water, which tends to fluctuate depending on the season and time, and the required characteristics of pH 5.0 to 6.5 and effective chlorine concentration of 10 to 80 ppm are obtained. It has become possible to generate filled slightly acidic electrolyzed water. In this embodiment, the set current and set voltage of the electrolytic control program are set according to the temperature of the raw water, but the present invention is not limited to this, and the set current and set voltage of the electrolytic control program are set. It may be set according to the temperature of the water to be electrolyzed, which is a mixture of raw water and an aqueous electrolyte solution.

In addition, the properties of the slightly acidic electrolyzed water generated by the characteristics of the electrodes 12a and 12b may deviate from the required characteristics of pH 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm. In order to deal with this, at least one of the set current and the set voltage of the electrolysis control program can be changed according to the properties of the slightly acidic electrolyzed water generated by operating various operation buttons on the operation panel 50. .. As a result, even when the pH and effective chlorine concentration of the slightly acidic electrolyzed water generated by the characteristics of the electrodes 12a and 12b deviate from the required characteristics of pH 5.0 to 6.5 and the effective chlorine concentration of 10 to 80 ppm, they are generated. The pH and effective chlorine concentration of the slightly acidic electrolyzed water can meet the required characteristics. Furthermore, the pH and effective chlorine concentration of the slightly acidic electrolyzed water generated when at least one of the set current and set voltage of the electrolysis control program is changed at the temperature of the raw water (arbitrary temperature) when actually using it. At least one of the set current and the set voltage changed according to the above is changed according to the temperature of the raw water or the electrolyzed water. This eliminates the need to change at least one of the set current and the set voltage at other temperatures, and improves the convenience of the operation of changing the set current and the set voltage of the electrolytic control program.

10 ... Electrolyzed water generator, 11 ... Electrolytic cell, 12a, 12b ... Electrodes, 20 ... Raw water supply pipeline, 30 ... Electrolyte aqueous solution supply pipeline, 40 ... Power supply device, 60 ... Control device.

Claims (5)

An electrolytic cell with a pair of electrodes and
The raw water supply pipeline that supplies the raw water supplied from the water supply source to the electrolytic cell, and
An electrolyte aqueous solution supply line for supplying an electrolyte aqueous solution containing at least hydrochloric acid to the raw water supplied to the electrolytic cell, and an electrolyte aqueous solution supply line.
A power supply unit that applies a DC voltage to the electrodes,
A control device for controlling the operation of the power supply device is provided.
The control device applies a DC voltage to the electrode by the power supply device for electrolyzed water obtained by mixing the raw water supplied from the raw water supply pipeline and the electrolyte aqueous solution supplied from the electrolyte aqueous solution supply pipeline. It is an electrolyzed water generator that has an electrolyzed control program that electrolyzes to generate slightly acidic electrolyzed water.
In the electrolysis control program, the raw water so that the set current and the set voltage when electrolyzing the electrolyzed water satisfy the required characteristics of the slightly acidic electrolyzed water having a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm. An electrolyzed water generator characterized in that it is set according to the alkalinity and the hydrochloric acid concentration of the aqueous electrolyte solution. In the electrolyzed water generator according to claim 1,
The electrolyte aqueous solution supply pipeline is provided with a delivery means for delivering the electrolyte aqueous solution to the electrolytic cell.
The electrolyzed water control device is characterized in that the control device is controlled so as to have the set current by changing the flow rate of the aqueous electrolyte solution delivered by the delivery means. In the electrolyzed water generator according to claim 1 or 2.
An electrolyzed water generator characterized in that at least one of the set current and the set voltage of the electrolysis control program can be changed according to the pH and effective chlorine concentration of the slightly acidic electrolyzed water to be generated. In the electrolyzed water generator according to any one of claims 1 to 3.
The set current and set voltage of the electrolysis control program are set according to the alkalinity of the raw water, the hydrochloric acid concentration of the aqueous electrolyte solution, and the temperature of the raw water or the electrolyzed water. Generator. In the electrolyzed water generator according to claim 4.
At least one of the set current and the set voltage of the electrolysis control program can be changed according to the pH and effective chlorine concentration of the slightly acidic electrolyzed water generated.
It is characterized in that at least one of the set current and the set voltage, which is changed according to the pH and the effective chlorine concentration of the slightly acidic electrolyzed water generated, is changed according to the temperature of the raw water or the electrolyzed water. Electrolyzed water generator.

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