JPH06335685A - Ionized water generator - Google Patents

Abstract

PURPOSE:To easily generate a specified strongly acidic water, etc., by using an oxidation-reduction electrode of glass relatively easy to handle and a two- stage electrolytic cell to accurately control electrolysis with the check of an oxidation-reduction potential. CONSTITUTION:This generator is provided with an electrolytic cell 1 for electrolyzing influent water, its electrolytic power source 2, an oxidation-reduction electrode 3 for detecting the oxidation-reduction potential of the water generated in the cell 1, an electrolytic cell 4 for corrective electrolysis, its electrolytic power source 5 and an oxidation-reduction electrode 6 for detecting the oxidation-reduction potential of the water generated in the cell 4. Further, an A/ D convertor 7 for A/D converting the detected potential data, a flow control switch 9 and a pump 10 for injecting brine into the influent water are furnised. The detected potential data of the electrode 3 are analyzed in a control part 8 to set the correction electrolysis level of the cell 4, the total recorrection electrolysis level is adjusted based on the detected potential data of the electrode 6, and the flow rate is controlled by the switch 9 and the injection of brine by the pump 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion water generator, and more particularly to an ion water generator having a two-stage electrolytic cell and controlling electrolysis by means of oxidation-reduction potential. The ionized water generator includes an alkaline ionized water generator that mainly uses alkaline ionized water, a strongly acidic water generator that mainly uses strongly acidic water having a low pH, and the like.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram of a conventional ionized water generator. Inflowing tap water is filtered by an activated carbon filter of a water purifier 53 and supplied to an electrolytic cell 54. When the water supply is started, the control unit 58 controlled by the microcomputer controls the electrolysis level corresponding to the PH designated by the user to the electrolysis power supply 5
The electrolysis ON / OFF relay 55 is turned ON to start electrolysis. The alkaline ionized water generated by electrolysis is taken out from the cathode side (−) of the electrolytic cell 54, and the acidic water is taken out from the anode side (+) of the electrolytic cell 54. A PH sensor 56 and a detection circuit 57 for detecting the pH of the generated alkaline ionized water and comparing it with the designated PH are provided at the outlet on the cathode side. An ion-selective glass electrode is used as the PH sensor 56, and the potential difference between the two electrodes in the test tank is measured by the detection circuit 57. For example, a water temperature of 25
If the electrode potential changes by 59 mV at ℃, it is converted into P
It is displayed that H has changed by 1.

The control unit 58 compares the PH of the generated water obtained from the detection circuit 57 with the designated PH, and if there is a difference, PH
PH is adjusted by calculating the feedback electrolysis level required for correction and adjusting the output of the electrolysis power supply 50. The electrolysis power supply 50 for producing normal ionized water sets the electrolysis level by a tap switching system of a power transformer or a stepless step system such as a thyristor bridge, but in the case of producing strongly acidic water of low PH, In particular, it is configured to support high level and large current output. In addition,
The polarity reversing relay 51 shown in FIG. 2 is for applying a reverse voltage during cleaning, and the current sensor 52 is for detecting an overcurrent.

[0004]

However, in the prior art shown in FIG. 2, the PH sensor 56 and the detection circuit 57 are used for checking the PH of the produced water. However, due to the structure of the glass electrode, the correction for the measurement error is performed. The configuration of the circuit is complicated and difficult to handle, and the collected data is P
There is a problem that it is limited to H check. In addition, the conventional method has a problem that it is difficult to generate specific strongly acidic water.

The present invention has been made in view of the above problems, and solves these problems by using a redox electrode which is relatively easier to handle than a glass electrode and an electrolytic cell having a two-stage structure. The purpose of the present invention is to provide an ion water generator that facilitates the production of specific strongly acidic water by performing accurate electrolysis control by checking the redox potential.

[0006]

In order to solve the above-mentioned object, the present invention provides an ion water generator for generating ion water by electrolysis by applying an electrolytic power supply between electrodes of an electrolytic cell,
A flow switch for adjusting the flow rate of inflow water supplied to the electrolysis cell, an additive solution pump for injecting an additive solution into the inflow water, a first electrolysis cell for performing a first electrolysis, and the first electrolysis cell A first electrolysis power supply for supplying electrolysis power to the electrolysis cell, a first oxidation-reduction electrode for detecting redox potential of water produced by the first electrolysis cell, and a second electrolysis cell for second electrolysis. Electrolysis cell, a second electrolysis cell that supplies electrolysis power to the second electrolysis cell, and a second oxidation-reduction electrode that detects oxidation-reduction potential of water produced by the second electrolysis cell. , An A / D converter for A / D converting the detection outputs of the first and second redox electrodes, and a specified electrolysis level for the first electrolysis power source, wherein the generated water of the first electrolysis tank is The first oxidation-reduction input via the A / D converter The redox potential is checked from the detection output of the pole, and the electrolytic level for correction to be applied to the second electrolytic cell is set based on the result of the redox potential check, and the generated water of the second electrolytic cell is set. Regarding the above, the redox potential is checked from the detection output of the second redox electrode that is input via the A / D converter and recorrection is performed, and if the capacity of each electrolytic power source is insufficient, a control signal is sent to the flow switch. Control for sending or adjusting the flow rate of inflow water, or sending a control signal to the additive solution pump to operate the pump to increase or decrease the electrolytic reaction in the electrolytic cell to increase or decrease the amount of additive solution injected into the inflow water. It is characterized by comprising a control unit for performing.

[0007]

With the above structure, the water produced by the electrolysis of the first electrolytic cell flows into the redox electrode tank of the next stage, and the redox potential is detected by the first redox electrode. Be seen. The control unit outputs the redox potential detection data to A /
The redox potential is checked by inputting through the D converter, the electrolysis level required for the correction electrolysis of the second electrolytic cell is calculated and set, and the second correction electrolysis is performed. The generated water generated by the correction electrolysis of the second electrolysis tank flows into the oxidation-reduction electrode tank of the next stage, and the redox potential is detected by the second oxidation-reduction electrode. The control unit inputs this detection data via the A / D converter, checks the oxidation-reduction potential, calculates the final electrolytic level for recorrection, and adjusts the first and second electrolytic power supplies again. When the power supply capacity is insufficient due to the generation of strongly acidic water, the control unit controls the flow rate by the flow switch or operates the additive liquid pump to increase the electrolytic reaction to increase or decrease the amount of additive liquid injected into the electrolytic cell. Since the control is performed, it is possible to control the electrolysis by the redox potential.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a redox potential controlled strongly acidic water generator according to an embodiment of the present invention.

In this embodiment shown in FIG. 1, a first electrolytic cell 1 to which tap water flowing through a water purifier is supplied, and an electrolytic cell 1
First electrolysis power supply 2 for applying electrolysis power supply to the electrodes of
And a first redox electrode 3 having a pt platinum electrode structure provided in a first redox electrode tank 13 into which water produced by electrolysis of the electrolyzer 1 flows, and the first redox electrode tank The second electrolysis tank 4 in which the generated water that has passed through 13 flows in to perform the correction electrolysis, the second electrolysis power supply 5 for applying the electrolysis power supply to the electrodes of the electrolysis tank 4, and the correction electrolysis of the electrolysis tank 4 The second redox electrode 6 provided in the second redox electrode tank 16 for detecting the redox potential of the generated water generated by the above (the second redox electrode 6 is the first redox electrode 3). The same structure), an A / D converter 7, a flow switch 9 for adjusting the flow rate of inflow water, a salt water pump 10 with an ON / OFF drive unit for injecting salt water as an additive liquid into the inflow water,
It is composed of an injecting salt water tank 11 and a control unit 8 for controlling the operation of all of these by a microcomputer.

Although not shown, the alkaline ionized water and the strongly acidic water-produced water withdrawing pipes 14, 15, 17, 18 of the electrolytic cells 1 and 4 have a structure which can be switched by a switching valve. In the case of 1, the first and second redox electrode tanks 13 and 16 having the first and second redox electrodes 3 and 6 are provided on the right side, and the straight running water pipes 15 and 18 are provided on the left side. When switching with the switching valve,
The first and second redox electrode tanks are moved to the left side, and the right side is a straight running water pipe. If the electrodes on the right side of the electrolyzers 1 and 4 in FIG. 1 are used as anodes, the redox potential of the acidic water produced water is controlled, and the alkaline ionized water produced water is controlled by the switching valve. Will be done. In addition, a polarity reversal mechanism for electrode cleaning, electrolytic ON / O
The FF mechanism has the same structure as the conventional example. The redox electrodes 3 and 6 have a structure in which the potential between the redox electrodes 3 and 6 is detected as the redox potential.

Next, the operation will be described. When the inflow water that has passed through the water purifier is supplied to the electrolysis tank 1, the control unit 8 performs electrolysis at the electrolysis level set in the electrolysis power supply 2, and the produced water produced by electrolysis flows into the oxidation-reduction electrode tank and is oxidized. The reduction potential is detected. To detect the redox potential by the redox electrode 3, the pt platinum electrode shown in the redox electrode tank of FIG. 1 is used as the redox electrode for detection, and the potential between the reference electrodes is detected by a high-impedance voltmeter. It is a thing.

The redox potential in this case refers to the equilibrium potential at which the electrode reaction at the pt platinum electrode is in the state of current i = 0 when the oxidation reaction and the reduction reaction are in an equilibrium state. When the electrode is polarized in the + direction from the equilibrium potential, the electrode reaction becomes an oxidation reaction, and conversely when it is polarized in the − direction, it becomes a reduction reaction, and the magnitude of the deviation from the equilibrium potential (overvoltage) represents the driving force of the reaction. Therefore, accurate electrolysis control can be performed by setting the electrolysis level based on the redox potential and the overvoltage data.

The redox potential thus detected by the redox electrode 3 is input to the controller 8 as digital data by the A / D converter 7. The control unit 8 analyzes the data, and when the electrolysis level previously set in the electrolysis power source 2 corresponds to the redox potential, the detection potential of the redox electrode 3 becomes the redox potential corresponding to the set pH. If there is a deviation in the detected potential, a correction electrolysis level corresponding to the deviation is calculated, the correction electrolysis level is set in the electrolysis power source 5, and the correction electrolysis is performed in the electrolytic cell 4.

When the electrolysis level set in the electrolysis power source 2 corresponds to a certain overvoltage value deviated within a certain limit from the redox potential, the potential detected by the redox electrode 3 is the overvoltage component. The control unit 8 analyzes the input data from the A / D converter 7 to compare and determine that it is deviated from the redox potential corresponding to the set pH, and similarly performs the correction electrolysis by the electrolytic cell 4 according to the result. .

Then, a final check is performed on the total produced water that has passed through the two-stage electrolytic cells 1 and 4 based on the detection data of the redox electrode 6 having the same structure as the redox electrode 3. The control unit 8 inputs the detected potential of the redox electrode 6 as digital data by the A / D converter, analyzes the input data, compares it with the previously set data, makes a determination, and calculates recorrection data. Total readjustment of electrolysis level of electrolysis power supplies 2 and 5 is performed. The electrolytic power sources 2 and 5 need to be set in consideration of the power source capacity.

When a large current such as the generation of a specific strongly acidic water is required, the control unit 8 sends a control signal to throttle the flow rate of the inflowing water by the flow switch 9 to operate the salt water pump to operate the electrolytic cell. Increase the amount of salt water injected into the water supply to
By increasing the conductivity by increasing the amount of Na ⁺ ions and enhancing the electrolytic reaction, electrolytic control including chemical correction for producing desired product water is performed. When the capacities of the electrolysis power sources 2 and 5 are insufficient, the control unit 8 sends a control signal to increase the flow rate of inflow water by the flow switch 1 to operate the salt water pump 10 in the direction in which the inflow rate decreases, and the electrolytic cell is activated. The amount of salt water injected into the water supply is reduced, and the conductivity is reduced by reducing Na ⁺ ions.

In this embodiment, the glass electrode of the PH sensor used in the conventional example has a structure in which the selective permeability of ions is formed by changing the composition of the glass, which is difficult to handle. In comparison, the pt platinum electrode of this example is relatively easy to handle. In addition, it is easy to generate specific ionic water / strongly acidic water by using the two-stage electrolytic cell. Although a strongly acidic water generator is shown in the above embodiment, the present invention can also be used in an alkaline ion water generator that generates alkaline ion water. In this case, a solution of calcium glycerophosphate or the like is used as the additive liquid.

[0018]

As described above, according to the present invention,
A flow switch for adjusting the flow rate of the inflow water, an additive liquid pump for injecting the additive liquid into the inflow water, and first and second two
The first and second redox electrodes for detecting the redox potential of the electrolysis tank of each stage and the water produced in each of the electrolyzers, and the detection potential of the first redox electrode are analyzed and based on the analysis result, When the correction electrolysis level of the second electrolysis cell is set and the correction electrolysis is performed, the detection potential by the second redox electrode is analyzed to adjust the total correction electrolysis level, and when the power supply capacity is insufficient or a large current is required, Since a control unit for controlling either or both of the control for squeezing or opening the flow switch and the control for increasing / decreasing the amount of the added liquid injected into the inflow water of the electrolytic cell by the operation of the additive liquid pump is provided. The use of the pt platinum electrode, which is relatively easy to handle for detection, makes it possible to collect control data and facilitate the generation of specific strongly acidic water.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a redox potential controlled strongly acidic water generator according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional ionized water generator.

[Explanation of symbols]

 1 1st electrolysis tank 2 1st electrolysis power supply 3,6 Redox electrode 4 2nd electrolysis tank 5 2nd electrolysis power supply 7 A / D converter 8 Control part 9 Flow switch 10 Salt water pump

Claims (1)

[Claims] 1. An ion water generator that generates an ion water by electrolysis by applying an electrolysis power supply between electrodes of an electrolyzer, a flow switch for adjusting a flow rate of inflow water supplied to the electrolyzer, and the inflow water. An additive solution pump for injecting an additive solution into the first electrolytic cell, a first electrolytic cell for performing the first electrolysis, a first electrolytic power source for supplying an electrolytic power source to the first electrolytic cell, and the first electrolytic cell A first redox electrode for detecting redox potential of generated water generated in the tank, a second electrolysis cell for second electrolysis, and a second electrolysis power supply for supplying electrolysis power to the second electrolysis cell. A / D conversion is performed between the electrolysis power supply, the second oxidation-reduction electrode that detects the oxidation-reduction potential of the water produced by the second electrolysis tank, and the detection outputs of the first and second oxidation-reduction electrodes. A / D converter and designated electrolysis for the first electrolysis power supply A bell is set and the redox potential is checked from the detection output of the first redox electrode that is input via the A / D converter for the water produced in the first electrolytic cell, and the result of the redox potential check is displayed. The detection output of the second oxidation-reduction electrode that sets the electrolysis level for correction to be applied to the second electrolytic cell based on the above, and inputs the generated water of the second electrolytic cell through the A / D converter. The redox potential is checked and corrected again, and when the capacity of each electrolytic power source is insufficient, a control signal is sent to the flow switch to adjust the flow rate of inflow water, or a control signal is sent to the additive liquid pump. Then, the ion water generator is provided with a control unit for controlling the pump to operate to increase or decrease the amount of the added liquid injected into the inflow water in order to raise or lower the electrolytic reaction in the electrolytic cell.