JPH06165987A - Voltage applying device of ionized water forming device - Google Patents

Abstract

PURPOSE:To realize a simplified electrolytic control circuit for which a relay and regulator are not used. CONSTITUTION:A control section 8 controls the on/off timing for turning the fixed voltage from a current rectifier circuit 2 to be applied to an electrolytic cell 10 by an electrolytic on/off means 4 by a GTO 5, etc., via a driving circuit 9 by a duty ratio control and frequency modulation control system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage applying device for controlling electrolysis by controlling ON / OFF of a voltage applied between electrodes of an electrolytic cell of an ionized water generator to adjust pH.

[0002]

2. Description of the Related Art FIG. 3 is a schematic configuration diagram of a conventional ionized water generator, in which a diaphragm 3 is provided between an anode 31 and a cathode 32 of an electrolytic cell 30.
There are three. A predetermined pulsating voltage for electrolysis is continuously applied via the voltage switching tap 35 on the secondary side of the power transformer 34 and the rectifier diode 36 to start electrolysis, and the pH value of the alkaline ionized water generated in the electrolytic cell 30 is adjusted. , And the control unit 38 compares it with the set pH value. When the pH value of the generated ionized water is lower than the set value, the power transformer 34
The voltage control signal is sent to the voltage control circuit 40 that controls the voltage switch 39 of the secondary tap 35 of FIG.

The voltage adjusting circuit 40 is a current voltage switch 39.
Is at the tap position corresponding to the electrolysis level 2 (for example, 18 V), the voltage switch 39 is at the electrolysis level 3 (for example, 25 V) or the electrolysis level 4 at the designated tap position.
Switch to the tap position corresponding to (for example, 30 V).
Conversely, when the pH value of the generated ionized water is high, the control unit 38
The voltage switch 39 is switched to a transformer tap position corresponding to the electrolysis level 1 (for example, 15 V) via the voltage control circuit 40, and the pulsating current voltage applied to the electrodes 31 and 32 of the electrolysis cell 30 is adjusted to generate water. PH is adjusted.

When a predetermined time elapses from the start of electrolysis or when the amount of electricity required for electrolysis reaches a predetermined value, the scale adhered to the electrodes 31 and 32 is removed to lower the electrolytic cell 30. Perform cleaning to restore efficiency. During the cleaning operation, the control unit 38 controls the polarity reversing relay 42,
A signal is sent to the polarity reversing circuit 41 for controlling 43, and a reverse voltage is applied to the electrodes 31 and 32 by switching the relay to perform cleaning.

The above is the method of adjusting the electrolysis levels 1 to 4 in four steps by switching the tap 35 on the secondary side of the power transformer 34. In addition to this, although not shown, a regulator is provided at the latter stage of the rectifier circuit, A regulator voltage adjustment method is also used in which the DC output is adjusted steplessly by a resistance voltage dividing circuit.

[0006]

However, in the prior art shown in FIG. 3, the voltage switching device 39 and the polarity reversing relay need to have a large rating, and the life of the relay becomes a problem. In this case, there is a problem that a voltage adjusting circuit 40 and a polarity converting circuit 41 for controlling each voltage switch 39 are required. Also,
In the case of the regulator voltage adjustment method that outputs a DC voltage, there is a large loss and there is a problem of heat generation.

The present invention has been made in view of the above circumstances, and the output voltage of the rectifier circuit applied to the electrolytic cell is turned ON / O.
By performing FF control and performing electrolytic adjustment, the voltage changer used in the tap change type of the power transformer is not used, and the problem such as heat generation that occurs in the regulator voltage adjustment type can be avoided. It is an object to provide a voltage application device for an ionized water generator having a circuit.

[0008]

In order to achieve the above object, the present invention provides an ion water generator for generating an alkaline ionized water and an acidic water by applying an electrolysis voltage between electrodes of an electrolytic cell. Electrolysis ON / OF to turn ON / OFF
F means, a drive circuit for driving the electrolysis ON / OFF means, and ON / OFF of the electrolysis ON / OFF means
And a control unit for controlling the pH of the produced water by controlling the time.

[0009]

According to the above construction, the electrolytic ON / OFF means such as a GTO for turning on / off the fixed voltage output of the rectifying circuit applied to the electrolytic cell is provided, and the control section controls the electrolytic ON / OFF via the drive circuit. Since the ON / OFF timing of the means is controlled by the duty ratio control or the frequency modulation control to adjust the pH, the circuit configuration for adjusting the pH of the generated water can be simplified.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a voltage application device for an ionized water generator according to an embodiment of the present invention. In FIG. 1, 1 is a power transformer, 2 is a rectifier circuit that outputs a DC-pulsating current voltage by a diode bridge, and 3 is a capacitor of the rectifier circuit 2.

Reference numeral 4 denotes a voltage ON / OFF means, which is a voltage O
As the N / OFF control element, the GTO5 as shown
(Gate Turn Off Thyristor: O with negative gate trigger
or a FET 7, a power transistor 6, a power relay, a triac, a bidirectional thyristor (not shown), or the like. Reference numeral 8 denotes a control unit for controlling the entire apparatus in addition to the ON / OFF control of the voltage ON / OFF means 4, and turns ON / OFF the element of the voltage ON / OFF means 4 via the drive circuit 9 by the electrolytic ON / OFF signal. Control.

Reference numeral 10 denotes an electrolytic cell having an anode 11 and a cathode 12, to which a rectified voltage is applied via an electrolysis / cleaning changeover switch 13 and a current sensor 14 for detecting an overcurrent.
Is a pH detection unit that detects the pH value of the alkaline ionized water generated in the electrolytic cell 10 and sends the pH value to the control unit 8.

Next, the operation will be described. Electrolysis ON / O
As the element of the FF means 4, GTO 5, power transistor 6, FET 7, triac, bidirectional thyristor or the like can be used. First, the case of using GTO 5 will be described as an example. With the configuration shown in the figure, a fixed output voltage from the rectifier circuit 2 is applied to the electrolytic cell 10 via the GTO 5, electrolytic / cleaning changeover switch 13, and current sensor 14, and the control unit 8 turns on / off electrolysis to start electrolysis. OFF
Send a signal (Low active).

This electrolysis ON / OFF signal is a signal as shown in FIG. 2, and the drive circuit 9 is a negative pulse electrolysis ON / OFF signal.
Invert the OFF signal and use G as a positive gate pulse.
The gate G of TO5 is driven to be turned ON, and when the electrolytic ON / OFF signal from the control unit 8 disappears, a negative gate pulse is output and GTO5 is turned OFF. That is, the drive circuit 9 is a drive unit having a TTL configuration or the like for driving the gate G of the GTO 5 in both positive and negative directions to turn ON / OFF the GTO 5.

The control unit 8 detects the pH value of the ionic water produced in the electrolytic cell 10 by electrolysis with the pH detection unit 15, and controls the ON / OFF of the voltage to the electrolytic cell 10 to adjust the pH of the produced water. To do. The adjustment method in this case is shown in FIG.
As shown in (a), when the pH of the produced water is low, electrolysis is turned on.
The electrolysis ON / OFF signal of the duty ratio control method is set to increase the duty ratio of the / OFF signal and decrease the duty ratio when the pH is high.

The drive circuit 9 drives the gate G of the GTO 5 with a positive pulse to turn on the GTO 5, and applies a fixed electrolytic voltage to the electrolytic cell 10. When the electrolysis ON / OFF signal disappears, the drive circuit 9 generates a negative pulse and applies it to the gate of the GTO 5, and turns OFF the GTO 5 to cut off the electrolysis voltage application to the electrolysis cell 10. In this way, the control unit 8 performs the electrolytic adjustment by the duty ratio control to adjust the pH of the generated water.

Alternatively, as shown in FIGS. 2B and 2C, the ON time of the electrolysis ON / OFF signal is constant and O
The pH may be adjusted by electrolytically adjusting the ON time constant control for changing the FF time, or conversely, by frequency modulation control for performing the OFF time constant control for changing the ON time with the OFF time fixed.

Other than the GTO 5, the power transistor 6 and the FET are used as the elements of the electrolysis ON / OFF means 4.
7. A power relay or the like can be used, and when the power transistor 6 is used by the electrolytic ON / OFF signal from the control unit 8, the base voltage of the power transistor 6 is controlled to drive the power transistor 6 ON / OFF. The drive circuit 9 to be used is prepared.

When the FET 7 is used, the drive circuit 9 for controlling the gate of the FET 7 to turn on / off the FET 7 is turned on. When the power relay is used, the relay is turned on / off.
By preparing the drive circuit 9 to turn off, GT
As in the case of O5, the pH is adjusted by ON / OFF controlling the electrolysis voltage by the duty ratio control and the frequency modulation control as shown in FIG.

When the electrode cleaning is performed after the electrolysis is completed, the electrolysis / cleaning changeover switch 13 is switched to invert the polarity of the voltage applied to the electrolytic cell 10 to perform cleaning for a certain period of time. Also,
When the current sensor 14 detects an overcurrent during electrolysis or cleaning, the control unit 8 performs overcurrent protection such as electrolysis OFF.

In this embodiment, the fixed output voltage of the rectifier circuit 2 is turned ON / OFF by the duty ratio control of the voltage ON / OFF means 4 by the GTO 5, the power transistor 6, the FET 7 or the like, or the frequency modulation control.
By doing so, the pH of the generated water is adjusted, so it is possible to adjust the pH without using the voltage switching device of the tap switching system or the relay control circuit, and the problem of heat generation like the system using a regulator occurs. do not do.

[0022]

As described above, according to the present invention,
Turn on / off the fixed output voltage from the rectifier circuit applied to the electrolytic cell
Electrolysis ON / OFF means such as GTO to turn off, and electrolysis O
Drive circuit for driving N / OFF means and electrolysis O
Since an ON / OFF timing of the N / OFF means is controlled by duty ratio control or frequency modulation control to adjust the pH, a simplified electrolytic adjustment circuit can be realized by reducing components such as relays. There is.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a voltage application device of an ion water generator according to an embodiment of the present invention.

FIG. 2 is a diagram showing a waveform of an electrolytic ON / OFF signal of the control circuit shown in FIG.

FIG. 3 is a configuration diagram of a conventional ionized water generator.

[Explanation of symbols]

 1 Power Transformer 2 Rectifier Circuit 3 Capacitor 4 Electrolysis ON / OFF Means 5 GTO 6 Power Transistor 7 FET 8 Control Section 9 Drive Circuit 10 Electrolytic Tank 11 Anode 12 Cathode 13 Electrolysis / Cleaning Change Switch 14 Current Sensor 15 pH Detection Section

Claims (1)

[Claims] 1. An ion water generator for applying an electrolysis voltage between electrodes of an electrolysis cell to produce alkaline ionized water and acidic water, and an electrolysis ON / OFF means for turning the electrolysis voltage ON / OFF, and the electrolysis ON Voltage application to the ion water generator, comprising a drive circuit for driving the ON / OFF means, and a control section for controlling the ON / OFF time of the electrolytic ON / OFF means to adjust the pH of the produced water. apparatus.