JP2019098202A - Electrolytic water generator - Google Patents

Abstract

To prevent overcurrent from flowing when starting the electrolytic pouring operation of an electrolytic water generator.SOLUTION: In an electrolytic water generator 10, a control device 60 controls to perform electrolytic pouring operation for supplying into an electrolytic cell 11 water to be teated, in which raw water by opening a water flow valve 22 and an aqueous electrolyte solution by actuating a delivery pump 32 are mixed, applying a DC voltage between a pair of electrodes 12a, 12b by a power supply device 40 in an electrolytic cell 11 to electrolyze the water to be electrolyzed, and pouring generated electrolytic water, and controlling to first open the water flow valve 22 when starting the electrolytic pouring operation and then actuating the delivery pump 32 and the power supply device 40.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an electrolyzed water generating device that generates electrolyzed water.

  Patent Document 1 discloses an invention of an electrolyzed water generating device that generates slightly acidic electrolyzed water. This electrolyzed water generating apparatus comprises an electrolytic cell provided with a pair of electrodes, a raw water supply pipeline for supplying raw water supplied from a water supply source such as water to the electrolytic cell, and sodium chloride in the raw water supplied to the electrolytic cell. It includes a sodium chloride aqueous solution addition pump that supplies sodium chloride aqueous solution from an aqueous solution storage tank, a hydrochloric acid aqueous solution pump that supplies aqueous hydrochloric acid to raw water from a hydrochloric acid aqueous solution storage tank, and a power supply that applies a DC voltage to a pair of electrodes. . In this electrolyzed water generating apparatus, water to be electrolyzed in which sodium chloride aqueous solution and hydrochloric acid aqueous solution supplied from sodium chloride aqueous solution addition pump and hydrochloric acid aqueous solution pump are mixed with raw water supplied from raw water supply pipeline continuously to the electrolytic cell The supplied water to be electrolyzed is electrolyzed by the direct current voltage applied from the power supply device to the pair of electrodes and poured out as slightly acidic electrolyzed water.

Unexamined-Japanese-Patent No. 5-237478

  In this type of electrolyzed water generating apparatus, when the electrolytic pouring operation is started, the raw water and the electrolytic solution are simultaneously supplied into the electrolytic cell, and a DC voltage is applied to the electrodes by the power supply device, to be electrolyzed It controls to electrolyze. The electrolyte concentration of the water to be electrolyzed in the electrolytic cell may remain high when the previous electrolytic pouring operation is abnormally stopped due to a power failure or the like. When a DC voltage is applied to the electrode in the electrolytic cell in this state, the electrode Over current could flow during this period, causing abnormal stoppage. An object of the present invention is to prevent an overcurrent from flowing when the electrolytic pouring operation of the electrolyzed water generator is started.

  In order to solve the above problems, the present invention comprises an electrolytic cell provided with a pair of electrodes, a water flow valve interposed in a raw water supply line for supplying raw water from a water supply source to the electrolytic cell, and an aqueous electrolyte solution tank Control the operation of a water pump, a water pump, a water pump, a water pump, and a power supply device for applying a DC voltage between a pair of electrodes, and a delivery pump interposed in an aqueous electrolyte solution supply line for supplying an aqueous electrolyte solution to the electrolytic cell The controller is configured to supply the water to be electrolyzed, which is a mixture of the raw water by opening the water flow valve and the electrolytic aqueous solution by the operation of the delivery pump, into the electrolytic cell, and a pair of power supply devices in the electrolytic cell. The electrolyzed water generating apparatus executes an electrolytic pouring operation in which a direct current voltage is applied between the electrodes to electrolyze the water to be electrolyzed and the produced electrolytic water is poured out, and the control unit performs the electrolytic pouring operation. Open the water valve first before starting delivery It is to provide an electrolytic water generation apparatus, characterized in that the control to activate the pump and power supplies.

  In the electrolyzed water generating apparatus configured as described above, when the electrolytic pouring operation is started, the water flow valve is opened first and then the delivery pump and the power supply device are controlled to operate, so the inside of the electrolytic cell is controlled. Even if the electrolyte remains at a high concentration, the concentration of the electrolyte is lowered by the raw water supplied earlier, and even if a DC voltage is applied between the electrodes by the power supply device in this state, an overcurrent flows between the electrodes. I was able to prevent it.

  The electrolyzed water generating apparatus configured as described above includes an ammeter that measures the current flowing between the pair of electrodes, and the control apparatus measures the current measured by the ammeter while the set voltage is applied between the electrodes by the power supply device. The flow rate of the electrolyte aqueous solution by the delivery pump is controlled to become the set current, and the control device first opens the water flow valve when starting the electrolytic pouring operation, and then operates the delivery pump. Finally, it is preferable to control the power supply to operate. When the operation of the power supply unit and the operation of the delivery pump are simultaneously performed, the aqueous electrolyte solution sent by the delivery pump takes time to pass through the aqueous electrolyte solution supply line, and the power supply unit applies a DC voltage between the electrodes in the electrolytic cell. When applied, the controller controls to increase the flow rate of the delivery pump based on the fact that the measurement current of the ammeter is lower than the set current, so that the excess aqueous electrolyte solution is sent into the electrolytic cell. Thus, an overcurrent may flow between the electrodes. On the other hand, when the controller starts the electrolytic pouring operation, the water flow valve is opened first, and then the delivery pump is operated, and finally the power supply device is operated. In a state where the aqueous electrolyte solution is supplied into the tank, the power supply device can apply a DC voltage between the electrodes in the electrolytic cell, and the excessive amount of the aqueous electrolytic solution is not sent into the electrolytic cell by the delivery pump. As a result, excessive current could be prevented from flowing between the electrodes due to excessive delivery of the aqueous electrolyte solution into the electrolytic cell.

  In order to solve the above problems, in another embodiment of the present invention, a water flow valve interposed in an electrolytic cell provided with a pair of electrodes and a raw water supply pipeline for supplying raw water from the water supply source to the electrolytic cell A delivery pump interposed in an aqueous electrolyte solution supply line for supplying an aqueous electrolyte solution from the aqueous electrolyte solution tank to the electrolytic cell, a power supply for applying a DC voltage between a pair of electrodes, a water flow valve, a delivery pump and a power supply The controller is provided with a controller for controlling the operation of the device, and the controller causes the electrolyzed water, which is a mixture of the raw water by opening the water flow valve and the electrolytic aqueous solution by the operation of the delivery pump, to be supplied into the electrolytic cell. The electrolyzed water generating apparatus executes an electrolytic pouring operation in which a direct current voltage is applied between a pair of electrodes by the power supply device to electrolyze the water to be electrolyzed and the electrolyzed water generated is poured out. Opening the water flow valve when starting the electrolytic pouring operation It is to provide an electrolytic water generation apparatus, characterized in that the delivery pump is controlled so as to operate the power supply from the actuate earlier. Also in this case, in a state where the aqueous electrolyte solution is supplied into the electrolytic cell, it becomes possible to apply a DC voltage between the electrodes in the electrolytic cell by the power supply device, and a delivery pump into the electrolytic cell As a result, it was possible to prevent the excess aqueous electrolyte solution from being sent, and to prevent an excess current from flowing between the electrodes due to the excess aqueous electrolyte solution being sent into the electrolytic cell.

It is the schematic of an electrolyzed water generating apparatus. It is a block diagram of a control device. It is a table | surface which shows the electric current and voltage which were set with the hydrochloric acid density | concentration of electrolyte aqueous solution, M alkalinity of raw water, and the water temperature of raw water.

  Below, one Embodiment of the electrolyzed water generating apparatus of this invention is described with reference to an accompanying drawing. The electrolyzed water generating apparatus 10 of the present invention is for producing slightly acidic electrolyzed water by electrolyzing the water to be electrolyzed in the non-diaphragm electrolytic cell 11, and in particular, the pH is 5.0 to 6.5, and the effective chlorine concentration is It produces 10-80 ppm of slightly acidic electrolyzed water. The electrolyzed water generating apparatus 10 includes an electrolytic cell 11, a raw water supply pipe 20 for supplying raw water to the electrolytic cell 11, an electrolytic aqueous solution supply pipe 30 for supplying an electrolytic aqueous solution containing hydrochloric acid to the raw water, and electrodes of the electrolytic cell 11. A power supply device 40 for applying a DC voltage to 12a and 12b is provided.

  The electrolytic cell 11 is for electrolyzing the water to be electrolyzed. The electrolytic cell 11 is a one-chamber type non-diaphragm electrolytic cell, and the electrolytic cell 11 is provided with a pair of electrodes 12 a and 12 b. Connected to the electrolytic cell 11 are a raw water supply pipe line 20 for supplying raw water from a water supply source such as a water pipe and a pouring pipe line 13 for discharging the 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 line 20. The raw water sent from the water supply source is reduced in pressure by the pressure reducing valve 21, and 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 pipeline 20, and the temperature sensor 23 detects the temperature of the raw water passing through the raw water supply pipeline 20, and the flow meter 24 measures the raw water supply pipeline. Detect the flow rate of raw water passing through 20. The raw water supply pipe 20 may be provided with an alkalinity measuring device to measure the M alkalinity of the raw water by the alkalinity measuring device.

  An aqueous electrolyte solution supply line 30 is connected to the raw water supply line 20. The aqueous electrolyte solution supply line 30 supplies an aqueous electrolyte solution from the aqueous electrolyte solution tank 31 to the electrolytic cell 11 through the raw water supply line 20. The aqueous electrolyte solution stored in the aqueous electrolyte solution tank 31 contains at least hydrochloric acid. In this embodiment, the saturated aqueous sodium chloride solution is prepared so as to have a predetermined concentration of hydrochloric acid. A delivery pump (delivery means) 32 is interposed in the aqueous electrolyte solution supply line 30, and the aqueous electrolyte solution in the aqueous electrolyte solution tank 31 passes through the aqueous electrolyte solution supply line 30 by the operation of the delivery pump 32, and a raw water supply line Sent to 20. The delivery pump 32 is a variable flow type pump, and the flow rate is adjusted by changing the rotational speed according to the number of strokes of the pump according to the pulse signal. As the electrolyte aqueous solution in the electrolyte aqueous solution tank 31, an electrolyte aqueous solution having a hydrochloric acid concentration different 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 electrolyte aqueous 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 electrolyte aqueous solution having a hydrochloric acid concentration of 1.0 wt% When the M alkalinity of the raw water is 60 to 80 ppm, an electrolyte aqueous solution having a hydrochloric acid concentration of 1.2 wt% is used.

  The power supply device 40 applies a DC voltage to the electrodes 12 a and 12 b in the electrolytic cell 11 to electrolyze the water to be electrolyzed in the electrolytic cell 11. An ammeter 41 is connected between the power supply device 40 and the electrode 12a, and the ammeter 41 measures the current flowing from the power supply device 40 to the wiring connecting the electrode 12a, whereby the electrolytic current flowing in the electrolytic cell 11 It measures the 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 generating apparatus 10 includes an operation panel 50, and the operation panel 50 is provided with a display panel and operation buttons (both not shown). On the display panel, it is possible to 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, the out-of-liquid state of the aqueous electrolyte solution in the aqueous electrolyte solution tank 31, and the like. Further, various operation buttons are used to perform a pouring operation (pouring button) of slightly acidic electrolyzed water, switching of display by a display panel, and input of M alkalinity of raw water and hydrochloric acid concentration of an aqueous electrolyte solution.

  As shown in FIG. 2, the electrolyzed water generating device 10 includes a control device 60, and the control device 60 includes a water flow valve 22, a temperature sensor 23, a flow meter 24, a delivery pump 32, a power supply device 40, and an ammeter. 41 are 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 not shown) connected to one another via a bus.

  The control device 60 is provided with an electrolysis control program for executing an electrolysis pouring operation in which the ROM generates a slight acidic electrolyzed water continuously by electrolysis and pours out the ROM, as shown in FIG. The electrolysis control program is set according to the M alkalinity (alkalinity) of the raw water and the hydrochloric acid concentration of the aqueous electrolyte solution so that the set current and set voltage when electrolyzing the water to be electrolyzed satisfy the required characteristics of slightly acidic electrolyzed water It is done. The set current and set voltage of the electrolysis control program are set according to the temperature of the raw water as well as the alkalinity degree of the raw water and the hydrochloric acid concentration of the electrolyte aqueous solution. When the control device 60 executes the electrolytic pouring operation of the electrolysis control program, the water to be electrolyzed in which the raw water supplied from the raw water supply pipe 20 is mixed with the aqueous electrolyte solution sent out by the delivery pump 32 The flow rate of the aqueous electrolyte solution by the delivery pump 32 is controlled so that the measurement current of the ammeter 41 becomes the set current while being supplied and the set voltage is applied between the electrodes 12a and 12b in the electrolytic cell 11 by the power supply device 40. The to-be-electrolyzed water is electrolyzed to be a slightly acidic electrolyzed water and poured out from the pouring pipe line 13.

  An electrolysis pouring operation of an electrolysis control program for pouring out slightly acidic electrolyzed water in the electrolyzed water production apparatus 10 will be described. When the electrolyzed water generating apparatus 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 electrolytic aqueous solution corresponding to the M alkalinity of the raw water are operated by operating the various operation buttons. Enter it. When the operation button for pouring the operation panel 50 is pressed, 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 pipeline 20. Further, as described above, in order to satisfy the required characteristics of slightly acidic electrolyzed water, the M alkalinity of the raw water input in advance, the hydrochloric acid concentration of the electrolytic aqueous solution, and the set current and set voltage based on the detected water temperature by the temperature sensor 23 The control device 60 controls the application of the voltage between the electrodes 12 a and 12 b 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 ammeter 41 The flow rate of the aqueous electrolyte solution is controlled by changing the rotational speed of the delivery pump 32 so as to achieve the set current.

  Electrolyzed water continuously supplied into the electrolytic cell 11 is electrolyzed by a direct current flowing from the power supply 40 to the electrodes 12a and 12b, and chlorine ions become hypochlorous acid on the anode side and sodium on the cathode side. Sodium hydroxide and hydrogen gas are generated by the reaction of ions and water. Further, sodium hydroxide generated on the cathode side is neutralized by hydrochloric acid contained in the water to be electrolyzed, and the pH of the generated electrolyzed water as a whole becomes 5.0 to 6.5. Thus, the electrolyzed water continuously generated by the electrolyzed water generating apparatus 10 becomes a slightly acidic electrolyzed water having a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm. There is.

  In the electrolyzed water generating apparatus 10, there is a possibility that the to-be-electrolyzed water with a high concentration of the aqueous electrolyte solution may remain in the electrolytic cell 11 if the electrolyzing operation performed immediately before is abnormally stopped due to a power failure or the like. If a direct current voltage is applied to the electrodes 12a and 12b in the electrolytic cell 11 in this state, an overcurrent may flow between the electrodes 12a and 12b and abnormal stop may occur. For this reason, when starting the electrolytic pouring operation, the control device 60 controls so that the water flow valve 22 is opened first, and then the delivery pump 32 and the power supply device 40 are operated (for example, after 3 seconds) doing. By controlling in this manner, even if the water to be electrolyzed having a high concentration of the electrolyte aqueous solution remains in the electrolytic cell 11, the concentration of the aqueous electrolyte solution of the water to be electrolyzed is lowered by the raw water previously supplied to the electrolytic cell 11. Even if a DC voltage is applied between the electrodes 12a and 12b by the power supply device 40, an overcurrent can be prevented from flowing between the electrodes.

  In addition, when the operation of the power supply device 40 and the operation of the delivery pump 32 are simultaneously performed after the water flow valve 22 is opened, the aqueous electrolyte solution sent by the delivery pump 32 passes through the aqueous electrolyte solution supply line 30 to the electrolytic cell 11. Before reaching, the DC voltage is applied between the electrodes 12a and 12b in the electrolytic cell 11 by the power supply device 40, and the control device 60 determines the flow rate of the delivery pump 32 based on the fact that the current measured by the ammeter 41 is lower than the set current. Control is made to increase, and an excess of the electrolyte aqueous solution is sent into the electrolytic cell 11, which may cause an overcurrent to flow between the electrodes 12a and 12b. On the other hand, the controller 60 operates so that the flow rate of the delivery pump 32 becomes constant next (for example, after 3 seconds) after opening the water flow valve 22 first when starting the electrolytic pouring operation Finally, the power supply 40 is controlled to operate (for example, after 2 seconds). By controlling in this manner, when the electrolytic pouring operation is started, the aqueous electrolytic solution is supplied without delay into the electrolytic cell 11, and the power supply device 40 causes the electrode 12a and 12b in the electrolytic cell 11 to be separated. It becomes possible to apply a DC voltage, and the excessive amount of the electrolyte aqueous solution is not sent into the electrolytic cell 11 by the delivery pump 32, and the electrolytic aqueous solution is excessively fed into the electrolytic cell 11. Thus, it was possible to prevent an overcurrent from flowing between the electrodes 12a and 12b.

  In another embodiment, the controller 60 operates the power supply device 40 after opening the water flow valve 22 and operating the delivery pump 32 first at a constant flow rate when starting the electrolytic pouring operation. It may be controlled to Also in this case, in a state where the aqueous electrolyte solution is supplied into the electrolytic cell 11, a DC voltage can be applied between the electrodes 12a and 12b in the electrolytic cell 11 by the power supply device 40, Excessive aqueous electrolyte solution is prevented from being sent by the delivery pump 32 into the electrolytic cell 11, and excessive current is prevented from flowing between the electrodes due to excessive electrolytic aqueous solution being sent into the electrolytic cell 11. did it.

 DESCRIPTION OF SYMBOLS 10 ... Electrolyzed water production apparatus, 11 ... Electrolysis tank, 12a, 12b ... Electrode, 20 ... Raw water supply pipeline, 22 ... Water flow valve, 30 ... Electrolyte aqueous solution supply pipeline, 31 ... Electrolyte aqueous solution tank, 32 ... Delivery pump, 40 ... power supply device, 41 ... ammeter, 60 ... control device.

Claims (3)

An electrolytic cell provided with a pair of electrodes;
A water flow valve interposed in a raw water supply pipe for supplying raw water to the electrolytic cell from a water supply source;
A delivery pump interposed in an aqueous electrolyte solution supply line for supplying an aqueous electrolyte solution from an aqueous electrolyte solution tank to the electrolytic cell;
A power supply device for applying a DC voltage between the pair of electrodes;
The water flow valve, the delivery pump, and a control device that controls the operation of the power supply device.
The control device supplies the water to be electrolyzed, which is a mixture of the raw water by opening the water flow valve and the electrolytic aqueous solution by the operation of the delivery pump, into the electrolytic cell, and the pair of the power supply devices in the electrolytic cell. An electrolytic water generating apparatus that executes an electrolytic pouring operation of applying a direct current voltage between the electrodes of the electrode to electrolyze the water to be electrolyzed and pouring out the generated electrolytic water,
The control device is controlled to open the water flow valve first and then operate the delivery pump and the power supply device when starting the electrolytic discharge operation. . In the electrolyzed water generating apparatus according to claim 1,
An ammeter for measuring the current flowing between the pair of electrodes;
The control device controls the flow rate of the aqueous electrolyte solution by the delivery pump so that the measurement current of the ammeter becomes the set current in a state where the set voltage is applied between the electrodes by the power supply device.
The control device first opens the water flow valve when starting the electrolytic pouring operation, and then operates the delivery pump and finally controls the power supply device to operate. Electrolyzed water generator characterized by An electrolytic cell provided with a pair of electrodes;
A water flow valve interposed in a raw water supply line for supplying raw water to the electrolytic cell from a water supply source;
A delivery pump interposed in an aqueous electrolyte solution supply line for supplying an aqueous electrolyte solution from an aqueous electrolyte solution tank to the electrolytic cell;
A power supply device for applying a DC voltage between the pair of electrodes;
The water flow valve, the delivery pump, and a control device that controls the operation of the power supply device.
The control device supplies the water to be electrolyzed, which is a mixture of the raw water by opening the water flow valve and the electrolytic aqueous solution by the operation of the delivery pump, into the electrolytic cell, and the pair of the power supply devices in the electrolytic cell. An electrolytic water generating apparatus that executes an electrolytic pouring operation of applying a direct current voltage between the electrodes of the electrode to electrolyze the water to be electrolyzed and pouring out the generated electrolytic water,
The controller controls the power supply device to operate after opening the water flow valve and operating the delivery pump first when starting the electrolytic pouring operation. apparatus.

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