JPH0631274A - Reverse voltage cleaning process for continuous electrolytic water preparation device and its reverse voltage cleaning mechanism for carrying out the process - Google Patents

Abstract

PURPOSE:To save water consumption in reverse voltage cleaning and realize the sterilization effect of an electrolytic cell by discontinuing the water flow in the electrolytic cell, applying the voltage of reversed polarity, carrying out reverse voltage cleaning by means of residual water in the electrolytic cell and then discharging cleaning water into a drain. CONSTITUTION:Untreated water is fed from one side of an electrolytic cell 3 and alkali water and acid water electrolytically prepared in the electrolytic cell 3 are discharged respectively from a couple of drains 4 and 5 in a continuous electrolytic water preparation device. Reverse voltage cleaning is carried out by discontinuing the water flow in the electrolytic cell 3, applying the voltage of polarity reverse to the polarity of electrolytic water prepared to an electrode of the electrlytic cell 3, carrying out reverse voltage cleaning by means of the residual water in the elctrolytic cell 3 and then discharging the water in the electrolytic cell 3 into a drain 11. As a result, reverse voltage cleaning for the inside of the electrolytic cell 3 is carried out by using the residual water only, and as the reverse voltage cleaning is carried out by the residual water only, the temperature of the inside of the electrolytic cell 3 is raised up to 50-60 deg.C, and the sterilization of the inside of the electrolytic cell 3 is carried out by continuing the process for several minutes to several tens of minutes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of back electrolysis cleaning of a continuous electrolytic water conditioning apparatus for electrolyzing water to produce alkaline water and acid water, and a back electrolysis cleaning mechanism for carrying out this method.

[0002]

2. Description of the Related Art A continuous electrolytic water conditioner that supplies raw water from one side of an electrolytic tank and separately discharges alkaline water and acidic water electrolytically conditioned in the electrolytic tank from a pair of drain pipes is alkaline water for drinking or beauty. It is used to produce sterilized acidic water. In this type of electrolytic water conditioner, calcium or the like is deposited in the cathode chamber of the electrolytic cell that produces alkaline water to lower the electrolytic efficiency, so the polarity of the voltage applied to the electrodes is reversed and so-called reverse electrolysis cleaning is performed. There is something like this. And conventionally,
Reverse electrolysis was performed while passing raw water through the electrolytic cell.

[0003]

As described above, the conventional device in which the reverse electrolysis cleaning is performed while the raw water is passed through the electrolytic cell is as follows.
It was uneconomical because a large amount of water was used during reverse electrolysis cleaning.

An object of the present invention is to provide a method for reverse electrolysis cleaning which can save water consumption during reverse electrolysis cleaning and can obtain a sterilizing effect on an electrolytic cell.

A second object of the present invention is to provide a continuous electrolytic water conditioning apparatus having a reverse electrolysis cleaning mechanism for carrying out the above method.

[0006]

In order to achieve the above-mentioned first object, the reverse electrolysis cleaning method of the present invention is to supply raw water from one side of an electrolytic cell and to prepare alkaline water electrolytically prepared in the electrolytic cell. In the cleaning method of continuous electrolytic water conditioning equipment that separately discharges acidic water from a pair of drainage pipes, the flow of water in the electrolytic cell is stopped and the voltage of the opposite polarity to the electrolytic water conditioning is applied to the electrodes of the electrolytic cell. Is applied to perform reverse electrolysis cleaning with the accumulated water in the electrolytic cell, and thereafter, the inside of the electrolytic cell is discharged to a drain.

Further, in the reverse electrolysis cleaning mechanism of the present invention for achieving the second object, the raw water is introduced from one side of the electrolytic cell, and the alkaline water and the acidic water produced electrolytically are supplied to the other side of the electrolytic cell. In the continuous electrolytic water conditioning apparatus, which is configured to perform reverse electrolysis cleaning by reversing the voltage applied to the electrodes of the electrolytic cell as necessary while discharging each separately through a pair of drain pipes from
An electric valve installed in the water supply / drainage circuit of the electrolytic water conditioner that controls the opening and closing of water flow in the electrolyzer, and reverse electrolysis cleaning that connects the electrolyzer or the pair of drain pipes to the drain via the electric valve for opening and closing or switching. A water drainage circuit is provided, and the electric valve that controls water flow in the electrolytic cell is closed by a reverse electrolysis cleaning start signal, and the electromotive valve of the reverse electrolysis water drainage circuit is opened by a reverse electrolysis cleaning stop signal to the drain side. It is characterized by doing so.

[0008]

Function: The polarity of the applied voltage is reversed while the water flow in the electrolytic cell is stopped, so that the inside of the electrolytic cell is back-electrolyzed only with the accumulated water. In addition, since the reverse electrolysis cleaning is performed only with the accumulated water in the electrolytic cell, the temperature in the electrolytic cell rises to 50 ° to 60 ° C, and by continuing this for several minutes to several tens of minutes, the electrolytic cell is sterilized. .

In the backwashing mechanism of the present invention, the water flow in the electrolytic cell is stopped by the input of the backwashing switch or the backflow start signal from the electrolysis integrating circuit, and the backwashing is automatically performed only with the accumulated water. Switch to. Further, when the reverse electrolysis cleaning is completed, the accumulated cleaning water in the electrolytic cell automatically flows to the drain, and the cleaning water is discharged. Furthermore, if a reverse electrolysis cleaning water drain circuit is provided from a pair of drainage pipes via a switching electric valve, the electrolysis tank will be washed after the reverse electrolysis cleaning, and the reverse electrolysis cleaning water and the washing water will continue to the drain. Drained.

[0010]

EXAMPLE In the method for back electrolysis cleaning of the present invention, when cleaning the electrolytic water conditioning apparatus, first, the water circuit of the electrolytic water conditioning apparatus is closed, the water flow in the electrolytic cell is stopped, and the electrode of the electrolytic cell is electrolyzed. Apply a voltage with the opposite polarity to that used during water conditioning. As a result, the electrolytic cell is back-electrolyzed with only the accumulated water. After performing back electrolysis cleaning for a predetermined time, the accumulated cleaning water is discharged to the drain so that the cleaning water is not discharged to the intake port of alkaline water or acidic water.
In this case, as means for discharging the accumulated cleaning water to the drain, a method of discharging only the accumulated cleaning water to the drain while stopping the water supply of the electrolytic water conditioning apparatus, and a method of discharging the accumulated cleaning water to the drain while supplying water to the electrolytic tank There is a method of continuously discharging water and subsequent washing water to the drain, and the method of the present invention includes both.

Next, an embodiment of a reverse cleaning mechanism for carrying out the method of the present invention will be described with reference to the drawings. Figure 1,
The embodiment of FIG. 2 shows an embodiment in which water flow through the electrolytic cell is stopped, the electrolytic cell is back-electrolyzed with accumulated water, and the accumulated cleaning water is discharged to a drain. Is the water supply pipe 2
The raw water is supplied from the electrolysis tank 3 to one side of the electrolysis tank 3, and the alkaline water and the acidic water generated in the electrolysis tank 3 are supplied to the pair of drain pipes 4,
It is configured to discharge from 5 separately.

Since both FIGS. 1 and 2 show an embodiment of a device that uses alkaline water, a water intake faucet 6 is provided at the tip of the alkaline water drainage pipeline, and a faucet is installed in the alkaline water drainage pipeline 5. A detection switch 7 such as a flow switch or a pressure switch for detecting the flow of water in the conduit 5 to control ON / OFF of the electrolytic electric circuit of the electrolytic cell 3 when the valve 6 is opened is provided.

In the embodiment shown in FIG. 1, the acidic water discharge line 4 is
Is equipped with a solenoid valve 8 that closes the acid water discharge pipe 4 in conjunction with closing the alkaline water faucet 6 so that when the intake of alkaline water is stopped, the pair of drain pipes 4 and 5 are closed together. Has become.

As a means for stopping the flow of the acidic water drainage pipe 5 when the alkaline water faucet 6 is closed, an independent solenoid valve 8 such as a solenoid valve may be used as shown in FIG. 1, but as shown in FIG. To
A double flow switch 9 incorporating two upper and lower stages of flow switches 7 and 7 and a valve 8'for opening and closing another flow path following the operation of the flow switch 7 is used. While arranging the pipeline 4,
A configuration may be adopted in which the lower opening / closing valve 8'is arranged in the acidic water drainage pipe line 5. The double flow switch valve is known from Japanese Patent Laid-Open No. 63-266281.

In order to remove calcium deposited in the cathode chamber of the electrolytic cell 3 in the electrolytic water preparation, the continuous electrolytic water preparation apparatus 1
Reverse polarity cleaning is performed by reversing the polarities of the voltages applied to the negative electrode and the positive electrode.

In the continuous electrolytic water conditioning apparatus having such a structure, in the embodiment shown in FIGS. 1 and 2, the water supply pipe 2 is provided with the solenoid valve 10 which is closed by the start signal of the reverse electrolysis cleaning.
Wash water drain circuit 12 communicating from the electrolytic cell 3 to the drain 11
The drainage circuit 12 is provided with a solenoid valve 13 which is opened by a reverse electrolysis cleaning stop signal.

In the embodiment shown in FIGS. 1 and 2, the electric valves 14a, 1 which are closed to the pair of drainage pipes 4, 5 only during reverse electrolysis cleaning.
4b is provided. The valves 14a and 14b have a function of preventing reverse electrolysis cleaning water from mixing with electrolysis water to be used, but are not essential in this embodiment.

In the embodiment shown in FIGS. 1 and 2, the water flow through the electrolytic cell 3 is automatically stopped in association with the switching of the voltage polarity of the reverse electrolytic cleaning, and the reverse electrolytic cleaning is performed for a predetermined time only with the accumulated water in the electrolytic cell. At the same time, it has an automatic control unit A that automatically drains the backwash water to the drain 11 when the set backwash time has elapsed. 3 and 4 are electric circuit block diagrams of an electrolytic water conditioning apparatus including the above-mentioned automatic control unit, and FIG.
FIG. 4 corresponds to the embodiment of FIG.

Referring to FIGS. 3 and 4, the solenoid valves 10 and 13 are
First, when the faucet 6 is closed in the middle of electrolytic water conditioning, a signal from the flow switch 7 causes a contact 7a.
2 switches to the states shown in FIGS. 2 and 4, and the reverse current circuit 16 conducts on condition that the electrolytic integration circuit 15 has reached a predetermined value, and the polarity of the voltage applied to the electrodes is reversed (see the figure. At the same time, the solenoid valve 10 in parallel with the reverse electric circuit 16 is energized to stop the water supply to the water supply pipe 2. Therefore, the inside of the electrolytic cell 3 is back-electrolyzed only with the accumulated water in the stopped state.

When the set reverse charge cleaning time is reached, the reverse charge timer 17 is activated to open the relay normally-closed contact 17a of the (electromagnetic valve 10) of the reverse charge circuit 16, thereby completing the reverse charge wash. Reverse-timer 17 relay normally open contacts 17b, 1
When 7c is conducted, the electromagnetic valve 13 of the reverse electrolysis cleaning water drain circuit 12 is urged to open the drain circuit 12, and the reverse electrolysis cleaning water is drained to the drain 11. When the set drainage time elapses, the timer circuit 18 is activated to reset the integrating circuit 15 so that the solenoid valve 13 is turned off and the drainage circuit 12 is turned off.
Close. The electric valves 14a, 14b of the drainage pipes 4, 5 for the alkaline water and the acidic water are closed during the reverse electrolysis cleaning and during the drainage time of the cleaning water, and otherwise open to the alkaline water faucet 6 acidic water outlet side. There is.

Next, the embodiment shown in FIGS. 5 and 6 will be described. This embodiment is the same as the embodiment of FIGS. 1 and 2 in that the electromagnetic valve 10 stops water flow through the electrolytic cell 3 during reverse electrolysis cleaning, and reverse electrolysis cleaning is performed with accumulated water. The difference is that after that, raw water is passed through the electrolytic bath 3 for washing and washing, and the reverse electrolysis washing water and the washing water are continuously discharged to the drain 11.

For this reason, in the embodiment shown in FIGS. 5 and 6, the reverse electrolysis cleaning water drain circuit 12 and the solenoid valve 1 of the embodiment shown in FIGS.
In place of 3, the drainage circuits 19a and 19b leading from the alkaline water drainage pipe 5 to the drain 11 are branched, and the branch drainage circuits 19a and 19b are electrically operated by a flow path switching electric valve 20a,
20b is provided.

These electrically operated valves 20a, 20b are opened to the drain 11 side only during reverse electrolysis cleaning, drainage of reverse electrolysis cleaning water, and drainage of flushing water, and otherwise open to the alkaline water faucet 6 side and acid water outlet side. It has become.

Thus, in the embodiment shown in FIGS. 5 and 6, the solenoid valve 10 of the water supply pipe 2 is closed by the reverse electric signal, and
The electrically operated valves 20a and 20b are opened to the drain 11 side, whereby reverse electrolysis cleaning is performed with the accumulated water in the electrolytic bath 3, and when the set reverse electrolysis cleaning time elapses, the solenoid valve 10 of the water supply pipe 2 opens, By passing water to the electrolytic bath 3, the electrolytic bath 3 is washed with water, and the back electrolyzed fresh water and the wash fresh water are drained to the drain 11 via the electric valves 20a and 20b and the branch drainage circuits 19a and 19b. It is like this. In addition, when drainage of the washing water to the drain 11 is completed, the electric valve 2
0a and 20b open to the side of the alkaline water faucet 6 and the side of the acidic water outlet so as to be ready for the next electrolytic water conditioning.

In the embodiment of FIG. 5, the electromagnetic valve 8 of the acidic water drainage pipe 5 is independent of the flow switch valve 7 of the alkaline water drainage pipe 4, so that the electromagnetic valve 8 is at least drained of the washing water. And electrolyzed water is opened.

FIG. 7 is a block diagram of an electric circuit for automatically controlling the embodiment of FIG. 5 as described above. Although the electric circuit block diagram of the embodiment of FIG. 6 is not shown, it is the same as the circuit diagram of FIG. 7 with the circuit of the solenoid valve 8 omitted.

The operation of the main part of the embodiment shown in FIG. 4 will be described with reference to FIG. When the reverse electric circuit 16 is turned on and the polarity to the electrodes is reversed, the solenoid valve 10 in parallel with the reverse electric circuit 16 is energized to close the water supply pipe 2. Therefore, the inside of the electrolytic cell 3 is backwashed with only the accumulated water.

When the set reverse charge cleaning time is reached, the reverse charge timer 1
7, the relay normally closed contact 17a of the reverse electric circuit 16 and the circuit of the solenoid valve 10 is opened, and the relay normally open contact 17 is opened.
Close a and 17b. As a result, the reverse electric circuit is turned off to complete the reverse electric cleaning, the solenoid valves 10 and 8 are opened, and raw water is passed from the water supply pipe 2 to the electrolytic cell 3. At this time, since the electric valves 20a and 20b are open to the drain 11 side, the backwash water is drained to the drain, and the electrolyzer 3 is washed with the raw water continuously supplied. Drained to.

When the drainage of the wash water reaches the set value of the timer circuit 21, the relay normally closed contact 21a of the circuit of the solenoid valve 8 opens and the solenoid valve 8 is closed. At the same time, the electric valves 20a, 2
The timer circuit 22 for switching 0b between the alkaline water faucet 6 and the acidic water outlet side is energized, and the relay contacts 22a of this timer circuit 22 restore the electric valves 20a and 20b to the original state, and the alkaline water faucet 6 side and the acidic water faucet 6 side. Open to the water outlet side.

Although the examples of the figures have all described the present invention by exemplifying a continuous electrolytic water conditioner for the purpose of producing alkaline water, the present invention uses acidic water for the purpose of beauty, bath water and the like. It goes without saying that it can be used in the same manner for the electrolytic water conditioning apparatus to be produced. In that case, a flow switch valve 7 and a faucet 6 are provided in the acidic water discharge conduit 5, and a solenoid valve 8 or a lower opening / closing valve 8'of the two-stage flow switch valve 9 is arranged in the alkaline water draining conduit 4.

[0031]

[Effect] According to the present invention, the water flow to the electrolytic cell is stopped during the reverse electrolysis cleaning, and the reverse electrolysis cleaning is performed only with the retained water, so that the water consumption during the cleaning is small and the water saving effect is obtained.

Further, since the temperature of the electrolytic cell rises due to the reverse electrolysis cleaning of the accumulated water, the temperature of the water in the electrolysis cell during the reverse electrolysis cleaning should be 5
By controlling the temperature at about 0 ° C to 60 ° C, sterilization in the electrolytic cell can be performed, and there is an effect of two birds with one stone.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an electrolytic water conditioning apparatus showing an embodiment of the present invention,

FIG. 2 is a view corresponding to FIG. 1 according to another embodiment of the present invention,

FIG. 3 is an electric circuit diagram of the control unit of FIG. 1 embodiment;

FIG. 4 is an electric circuit diagram of a control unit of FIG. 2 embodiment,

FIG. 5 is a view corresponding to FIG. 1, showing another embodiment according to the present invention,

FIG. 6 is a view corresponding to FIG. 2 of another embodiment according to the present invention,

FIG. 7 is an electric circuit diagram of the control unit of FIG.

[Explanation of symbols]

2 ... Water supply pipe, 3 ... Electrolyzer, 4,5 ... Alkaline water drainage pipe, 5 ... Acidic water drainage pipe, 6 ... Faucet, 7 ... Flow switch, 8 ... Solenoid valve, 9 ... Double flow switch, 10 ... Solenoid valve, 11 ... Drain, 12 ... Wash water drain circuit, 13 ... Solenoid valve, 14a, 14b ... Electric valve, 15 ... Electrolytic integrating circuit, 16 ... Reverse electric circuit, 1
7 ... Reverse transmission timer, 18, 22 ... Timer circuit, 19
a. 19b ... Branch drainage circuit, 20a, 20b ... Electric valve.

Claims (2)

[Claims] 1. A method for cleaning a continuous electrolysis water preparation apparatus, wherein raw water is supplied from one side of an electrolysis tank, and alkaline water and acid water electrolyzed in the electrolysis tank are separately discharged from a pair of drain pipes. By stopping the flow of water in the tank and applying a voltage of the opposite polarity to the one used during electrolytic water conditioning to the electrode of the electrolytic cell, back electrolysis cleaning is performed with the accumulated water in the electrolytic cell. Backwashing method for continuous electrolytic water conditioner characterized by discharging water to drain 2. Raw water is introduced from one side of the electrolyzer, and alkaline water and acid water produced by electrolysis are separately discharged from the other side of the electrolyzer through a pair of drain pipes and applied to electrodes of the electrolyzer. In a continuous electrolytic water conditioning system that reverses the voltage used to perform reverse electrolysis cleaning, an electric valve installed in the water supply and drain circuit of the electrolytic water conditioning system to control the opening and closing of water in the electrolytic cell and the opening and closing from the electrolytic cell A reverse drainage water drainage circuit that communicates with the drain through the electric valve, and the electric valve that controls the flow of water through the electrolytic cell by the reverse flushing start signal is closed,
A reverse electric cleaning mechanism of a continuous electrolytic water conditioning apparatus, comprising: an automatic control unit for opening the electric valve of the reverse electric cleaning water drain circuit to a drain side in response to a reverse electric cleaning stop signal. Raw water is introduced from one side of the electrolyzer, and alkaline water and acid water produced by electrolysis are separately discharged from the other side of the electrolyzer through a pair of drain pipes, and the voltage applied to the electrodes of the electrolyzer is reversed. In a continuous electrolytic water conditioning system that is designed to perform reverse electrolysis cleaning, an electric valve that is installed in the water supply / drainage circuit of the electrolytic water conditioning system and controls opening / closing of water flow in the electrolytic cell, and a switch for switching from the pair of drain pipes A reverse drainage water drainage circuit that communicates with the drain through an electric valve and the electric valve that controls the flow of water in the electrolytic cell by a reverse drainage start signal, and a reverse drainage water drainage circuit by a reverse drainage stop signal Of the electric valve Reverse current cleaning mechanism of a continuous electrolytic water conditioner apparatus characterized that it comprises an automatic control unit which opens Ren side