JPH0780459A - Ph control device of ion water making device - Google Patents

Abstract

PURPOSE:To correspond to wide water quality by variably controlling the connection number of split electrodes corresponding to the conductivity band of inflow water. CONSTITUTION:The pH control device of an ton water making device is constituted of an electrolytic power supply 1 of a tap changeover system due to electrolytic voltage relays (a)-(d), a conductivity relay 2 containing relays A, B, C for turning respective split electrodes 3,4,5 ON/OFF, an electrolytic cell 6 constituting an electrode by the split electrodes, a conductivity meter 7 detecting the conductivity of inflow water, an electrolytic voltage control circuit turning an electrolytic voltage relay ON/OFF and a control circuit 10 performing the selective connection of the split electrodes corresponding to the low and high bands of conductivity to perform pH correction control due to the control of electrolytic voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pH controller for an ionized water generator capable of handling various water qualities. More specifically, a plurality of divided electrodes are selectively connected according to the conductivity of the inflow water,
The present invention relates to a pH control device for an ionized water generator that adjusts pH according to water quality.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram of a conventional ionized water generator. The tap water flowing in from the faucet is filtered by a filter in the water purifier 53 to remove chlorine, impurities, etc.
Water is supplied to 4. When the controller 58 detects the inflow of water to the water purifier 53 by turning on the water pressure switch 59, it sets the electrolysis level corresponding to the desired pH in the electrolysis power supply 50 to turn on / off electrolysis.
Turn off the switch 55 to set the electrolysis level to the electrolyzer 5.
4, and electrolysis is started. When the electrolysis power supply 50 is a step type in which the electrolysis power supply 50 switches the tap on the secondary side of the power transformer to adjust the voltage, an electrolysis mode signal is sent to operate the tap switching relay to set the electrolysis level corresponding to pH. To do. Alternatively, when the electrolysis power source 50 is of a multi-stage type using an SCR bridge or the like, the SCR gate is controlled by the electrolysis mode signal of duty ratio control to perform multi-stage p
Set the H corresponding electrolysis level. The pH of the alkaline ionized water generated by electrolysis is detected by the pH sensor 56, the pH value detected by the controller 58 is compared with the set pH value via the A / D conversion circuit 57, and the electrolytic level is adjusted again. pH correction control is performed. Further, the occurrence of overcurrent during operation is monitored by the current sensor 52, and when overcurrent is detected, protection processing such as electrolysis stop is performed. When the electrolysis is completed, the cleaning / electrolysis relay 51 is switched to perform electrode cleaning in which a reverse voltage is applied between the electrodes.

[0003]

However, in the prior art shown in FIG. 2, since there is no check mechanism for the water quality of the inflow water and uniform control is performed, the water quality of the inflow water having a particularly high conductivity in a high temperature area or the like is used. There is a problem that the pH of the produced water rises excessively under the use environment, and conversely, it does not rise to the desired pH under the environment where the conductivity is low such as in cold regions. The present invention has been made in view of the above-described problems, and by selectively connecting a plurality of electrodes according to the conductivity of inflow water, a desired pH is obtained regardless of the magnitude of the conductivity that varies depending on the water quality of the use environment. It is an object of the present invention to provide a pH control device for an ionized water generator that can guarantee the above.

[0004]

In order to achieve the above-mentioned object, the present invention is to produce ionic water for variably controlling an electrolysis level applied between electrodes of an electrolytic cell to produce alkaline ionized water or acidic water having a predetermined pH. In the pH control device of the vessel, a plurality of electrodes, a plurality of relays for turning on / off the electrolysis level applied in parallel from the electrolysis power source to the plurality of electrodes for each electrode, and a pre-stage of the electrolytic cell are installed. Conductivity detecting means for detecting the conductivity of the inflow water, and the number of connecting electrodes is selected corresponding to the detecting means, and a control signal is sent to each relay of the selected electrodes to perform electrode selective connection and then electrolysis. It is characterized in that a control unit for performing pH adjustment control by level adjustment is provided. Further, the pH control device for the ionized water generator is characterized in that it is provided with a control unit for judging water entry based on a detection value from the conductivity detecting means.

[0005]

With the above structure, the control unit increases the number of connections to the plurality of electrodes corresponding to the conductivity of the inflow water detected by the conductivity detection unit when the conductivity band is high,
Select the number of electrodes corresponding to each conductivity band so that it decreases in the low band, and turn on each conductivity relay.
Since the pH is adjusted by adjusting the electrolysis level of the electrolysis power source after performing the ON / OFF process, it is possible to perform the pH control that guarantees a desired pH regardless of the magnitude of the conductivity, which varies depending on the water quality. Further, since the inflow water is detected by detecting the change in the conductivity data value of the inflow water at a slow time, the water pressure switch is not necessary.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a water quality-compatible ionized water generator according to an embodiment of the present invention. In the embodiment shown in FIG. 1, the electrolytic voltage relay a, which switches the taps for setting the electrolytic level (1 to 4 steps from the bottom in FIG. 1) on the secondary side of the power transformer,
b, c, d, an electrolytic power source 1 composed of a diode rectifier circuit D, and relays A, B, C for turning on / off the divided electrodes 3, 4, 5 taken out in parallel from the electrolytic power source 1. And a conductivity relay 2 constituting the same.

Further, an electrolysis tank 6 which constitutes an electrolysis electrode including the divided electrodes 3, 4, and 5, a conductivity meter 7 installed in the preceding stage of the electrolysis tank 6 for detecting the conductivity of the inflow water, and the detected conductivity. Corresponding to the A / D converter 8 for A / D converting the data, the electrolytic voltage control circuit 9 for driving the electrolytic voltage relays a to d, and the conductivity band of the inflow water detected by the conductivity meter 7, the divided electrodes The control unit 10 has a microcomputer configuration that performs a desired pH adjustment by adjusting the electrolysis level after performing a water quality corresponding process of selecting the number of connections of 3, 4, and 5. In this embodiment, the number of divided electrodes is n = 3, but the number of n may be increased if necessary.

Next, the operation will be described. A / A is detected by a conductivity meter 7 using a conductivity measuring cell that measures the conductivity of the inflow water from the water faucet between the opposing electrodes.
The conductivity data converted by the D converter 8 is the control unit 1.
It is taken into 0. The conductivity of the inflow water is approximately 500 μs / in high temperature areas with high mineral content such as Okinawa and Taiwan.
cm or more, 200 μs / cm or less in the case of a cold region with a small number of contained ions such as Hokkaido, normal 200 to 50
Since it is divided into cases of 0 μs / cm, the conductivity band is 2
Low band of 00 μs / cm or less, high band of 500 μs / cm or more, and normal band of 200 to 500 μs / cm
Classify into bands and process.

Therefore, the control unit 10 which has taken in the conductivity data of the inflow water judges whether it is the low band, the high band or the normal band, and the divided electrodes 3 to 5 (the explanation will be proceeded based on the example of three divisions of FIG. 1). Select the number of connections corresponding to the conductivity band of. When the electrodes are selected, the control unit 10 controls the conductivity relays A, B,
A control signal for current control is sent to C to perform electrode selective connection. The electrode selection connection in this case is summarized in Table 1.

[0010]

[Table 1]

"I" is the electrolytic current per divided electrode. When the conductivity is in a high band as shown in Table 1, only the electrode 3 is connected, and the electrolytic current "1i" is sufficient.

On the other hand, in the low band, the electrodes 3,
All of 4, 5 are connected, the electrode area is tripled in the high band and the electrolytic current is tripled to the capacity “3i”, and sufficient pH adjustment is possible even in the low band. In the normal state, the electrodes 3 and 4 are connected in the middle and electrolysis is performed with the electrolytic current capacity set to "2i".

The above is the water quality control process based on the detection of the conductivity of the inflow water, and then the control unit 10 determines the desired pH based on the number of electrodes and the electrolytic current capacity selected and determined by the water quality control process.
Perform the corresponding electrolysis voltage control. The electrolysis voltage control is performed by sending an electrolysis level setting signal to the electrolysis voltage control circuit 9 as shown in FIG. 1 to drive the electrolysis voltage relays a to d to turn them on / off. Alternatively, although not shown, when the electrolytic power source 1 is configured by an SCR bridge or the like, a method of sending an electrolytic level setting signal for controlling the duty ratio of SCR turn-on to a trigger circuit to adjust the output steplessly is used. . The electrolysis level output by these methods is applied between the divided anode and single cathode to adjust the pH.

In this case, regarding the operation of the entire ionized water generator, the control unit 10 detects the inflow water at the timing of fetching the conductivity data from the conductivity meter 7 (depending on the response time), and after detecting the inflow water, the conventional method is performed. Electrolysis on
Electrolysis on operation of the / off relay is an electrode selective connection operation corresponding to water quality, that is, on / o of the conductivity relays A, B, and C.
The operation is continuous with the ff operation. Then, the pH correction control is performed by the electrolysis voltage control based on the selected number of electrodes.
H adjustment becomes possible. In addition, the cleaning operation by switching the cleaning / electrolysis relay 51 is the same as the conventional one.

Further, the case of setting the three-divided electrodes 3, 4, 5 and the three bands as the conductivity band has been described so far based on the example of FIG. 1, but the present invention is not limited to this and the same method is used. If the number of electrode divisions and the number of conductivity relays are increased from 3 to n or more, and the conductivity band is further divided and set from the setting of 3 bands, more prompt pH control becomes possible.

[0016]

As described above, according to the present invention,
A plurality of electrodes, a plurality of relays that turn ON / OFF the electrolysis level applied in parallel from the electrolysis power source to each of the plurality of electrodes, and a relay installed in the preceding stage of the electrolytic cell to detect the conductivity of the inflow water. The conductivity detecting means and the number of connecting electrodes corresponding to the detecting means are selected, a control signal is sent to each relay of the selected electrodes to perform electrode selective connection, and then pH adjustment control by electrolysis level adjustment is performed. Since it is composed of a control unit that performs, it is possible to generate ionic water with the same pH regardless of the magnitude of the conductivity depending on the water quality. Also, by dividing the number of electrodes into the electrolysis power source into n, parallel Since the operation is divided, the current per piece becomes 1 / n, and the heat generation trouble is reduced, and the electrolytic efficiency is increased. Further, since the inflow water is detected by detecting the change in the conductivity data value of the inflow water over time, a water pressure switch for determining the presence or absence of the inflow water is not necessary.

[Brief description of drawings]

FIG. 1 is a pH of an ionized water generator according to an embodiment of the present invention.
It is a block diagram of a control apparatus.

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

[Explanation of symbols]

 1 Electrolytic Power Supply 2 Conductivity Relay 3, 4, 5 Split Electrode 6 Electrolytic Tank 7 Conductivity Meter 8 A / D Converter 9 Electrolytic Voltage Control Circuit 10 Control Section

Claims (2)

[Claims] 1. A pH controller for an ion water generator that variably controls an electrolysis level applied between electrodes of an electrolytic cell to generate alkaline ionized water or acidic water having a predetermined pH. A plurality of relays for turning on / off an electrolysis level applied in parallel to each electrode from an electrolysis power source for each electrode; a conductivity detecting means installed in a preceding stage of the electrolytic cell to detect conductivity of inflow water; A controller is provided which selects the number of connecting electrodes corresponding to the detecting means, sends a control signal to each relay of the selected electrodes to perform electrode selective connection, and then performs pH adjustment control by electrolysis level adjustment. A pH control device for a featured ionized water generator. 2. The pH control device for an ion water generator according to claim 1, further comprising a control unit for determining water entry based on a detection value from the conductivity detecting means. PH control device.