JPH0970581A - Ionic water producing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce acidic waters different in chlorine concn. by one set of an ionic water producing device. SOLUTION: Electrodes different in kinds are disposed in an electrolytic cell, so that voltage impression can be switched for every electrode. The electrolytic cell 10 is divided into two electrode cells 14 and 16 through a diaphragm 12 for electrolysis. The electrodes 18A, 18B and 20A, 20B are different in kinds. The switching of the voltage impression to the electrode and the switching of the voltage polarity are controlled by a control part 22.

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 for electrolyzing water to generate strong acid water having a disinfecting and sterilizing action.

[0002]

2. Description of the Related Art Conventionally, an electrolytic cell having a diaphragm for electrolysis provided between electrodes of a cathode and an anode is used, water is supplied into the electrolytic cell, and a voltage is applied to both electrodes so that the water There is known an ionized water generation device that generates water into acidic water and alkaline water.

The acidic water thus produced has a pH value of 3
The following strongly acidic water has a disinfecting and sterilizing action, so it is used in hospitals for sterilizing water for medical equipment and for sterilizing water for fingers, and as the sterilizing water, one having a high effective chlorine concentration is used for disinfection. Water with low effective chlorine concentration is used.

[0004]

In order to obtain strongly acidic water having different effective chlorine concentrations, it is sufficient to prepare an ion water generator dedicated to the concentration, but the drawback is that a plurality of ion water generators are required. is there.

Therefore, the conventional ionized water generator changes the voltage applied to the electrodes to change the electrolysis current (electrolysis condition), so that one ionized water generator can generate strong acidic water having different effective chlorine concentrations. Trying to get.

However, since the change rate of the effective chlorine concentration with respect to the change of the electrolysis current is 1 or less, for example, in order to generate the electrolyzed water having the effective chlorine concentration of 10 ppm into the electrolyzed water of the concentration of 30 ppm, the electrolysis current of 3 times or more is required. There is a drawback that

The present invention has been made in view of the above circumstances, and provides an ionized water generator capable of obtaining acidic water having different chlorine concentrations with a single ionized water generator without changing electrolysis conditions. The purpose is to do.

[0008]

In order to achieve the above-mentioned object, the present invention supplies water into an electrolytic cell provided with a diaphragm for electrolysis between electrodes of a cathode and an anode, and applies voltage to both electrodes. In an ionized water production apparatus that electrolyzes the water to generate acidic water and alkaline water by applying, the electrodes are formed of a plurality of pairs of electrodes and different types of electrodes are formed for each pair of electrodes, A means for switching the application of the voltage for each pair of electrodes is provided.

According to the present invention, the electrodes are formed by a plurality of pairs of different types of electrodes, and the voltage application is switched for each pair of electrodes. Therefore, acidic water having different chlorine concentrations can be used without changing the electrolysis conditions. It can be obtained with one ionized water generator. For example, if a pair of electrodes having a large chlorine overvoltage and a pair of electrodes having a small chlorine overvoltage are provided, acidic water having a low effective chlorine concentration can be obtained with a pair of electrodes having a large chlorine overvoltage under substantially the same electrolysis conditions. Therefore, acidic water having a high effective chlorine concentration can be obtained with a pair of electrodes having a small chlorine overvoltage.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an ionized water generator according to the present invention will be described below in detail with reference to the accompanying drawings.

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

The electrolytic cell 10 shown in FIG.
Is divided into two upper and lower polar chambers 14, 16.
Electrodes 18A and 20A are installed side by side in the polar chamber 14, and electrodes 18B and 20B are installed side by side in the polar chamber 16.
8A and the electrode 18B are opposed to each other, and the electrode 20A and the electrode 20B are opposed to each other. Electrode 18A and electrode 18
B is the same type of electrode, and the electrodes 20A and 20B are the same type but different from the electrodes 18A and 18B. Therefore, in the electrolytic cell 10, two different types are
A pair of electrodes is arranged. Also, these electrodes 18
The control unit 22 controls the switching of voltage application to the electrodes A and 18B and the electrodes 20A and 20B, and the switching of the polarity of the voltage.

The entrance to the pole chambers 14 and 16 (the left end in FIG. 1)
Is connected to bifurcated branch tubes 24 and 26, and to these branch tubes 24 and 26, a tap water supply pipe 28 that is connected to a tap of a water supply (not shown) is connected. As a result, tap water is supplied from the tap water supply pipe 28 to the polar chambers 14 and 16 via the branch tubes 24 and 26.

An electrolysis auxiliary agent introducing tube 30 is connected to the branch tube 24, and this electrolysis auxiliary agent introducing tube 3 is connected.
0 is connected to the electrolytic auxiliary agent solution tank 34 via the pump 32. Therefore, when the pump 32 is driven,
The electrolytic auxiliary agent solution 36 in the electrolytic auxiliary agent solution tank 34 is added to the tap water in the branch tube 24.

Similarly, an electrolysis auxiliary agent introducing tube 38 is connected to the branch tube 26, and the electrolysis auxiliary agent introducing tube 38 is connected via the pump 40 to the electrolysis auxiliary agent solution tank 3.
4 is connected. Therefore, when the pump 40 is driven, the electrolytic auxiliary agent solution 36 is added to the tap water in the branch tube 26. ON / OFF of pumps 32 and 40
Are controlled by the control unit 22.

Drainage channels 42 and 44 are connected to the outlets (right ends in FIG. 1) of the bipolar chambers 14 and 16 of the electrolytic cell 10. An alkaline water side three-way valve 46 and an acidic water side three-way valve 48 are attached in parallel to these drainage channels 42, 44, and an alkaline water intake flow passage 50 is connected to the alkaline water side three-way valve 46. An acidic water intake passage 52 is connected to the acidic water side three-way valve 48.

The alkaline water produced in the electrolytic cell 10 is
Water is taken from the alkaline water intake passage 50 by the opening / closing operation of the alkaline water side three-way valve 46. The acidic water generated in the electrolytic cell 10 is taken from the acidic water intake flow passage 52 by the opening / closing operation of the acidic water side three-way valve 48. The opening / closing operations of the alkaline water side three-way valve 46 and the acidic water side three-way valve 48 are
It is controlled by the control unit 22.

Next, the operation of the ionized water producing apparatus constructed as described above will be described.

First, when a voltage is applied to the electrodes 18A and 18B, the pump 3 is used when the electrode 18A is an anode.
2 to drive the electrolysis auxiliary agent solution 36 into the branch tube 24.
Add to tap water. At this time, the pump 40 is stopped. In this case, since alkaline water is generated in the polar chamber 16, the opening / closing of the alkaline water side three-way valve 46 is controlled to make the drainage channel 44 and the alkaline water intake channel 50 communicate with each other, and the alkaline water intake channel 50 is connected. Take alkaline water from.

Further, since acidic water is produced in the polar chamber 14, the opening / closing of the acidic water side three-way valve 48 is controlled so that the drainage channel 42 and the acidic water intake channel 52 are communicated with each other.
Take acid water from.

Then, the control unit 22 controls the electrode 18A.
Is switched to the cathode and the electrode 18B is switched to the anode, the pump 32 is stopped and the pump 40 is driven, and the electrolysis auxiliary agent solution 36 is supplied to the branch tubes 26 or 24 and 2.
Add to tap water in 6. In this case, since alkaline water is generated in the polar chamber 14 and acidic water is generated in the polar chamber 16, the drainage channel 42 and the alkaline water intake channel 50 are communicated with each other so that the alkaline water is alkaline from the alkaline water intake channel 50. The water is taken in, and the drainage channel 44 and the acidic water intake channel 52 are communicated with each other to take in the acidic water from the acidic water intake channel 52. Further, in this way, by switching the polarity of the applied voltage every predetermined time, the calcium scale attached to the cathode side can be removed.

As a result, acidic water having a chlorine concentration corresponding to the types of the electrodes 18A and 18B can be obtained.

Next, when voltage is applied to the electrodes 20A and 20B, the pump 32 is used when the electrode 20A is an anode.
Is driven to add the electrolysis auxiliary agent solution 36 to the tap water in the branch tube 24. At this time, the pump 40 is stopped. In this case, since alkaline water is generated in the polar chamber 16, the drainage channel 44 and the alkaline water intake channel 50 are communicated with each other to take alkaline water from the alkaline water intake channel 50. Further, since acidic water is generated in the polar chamber 14, the drainage channel 42 and the acidic water intake channel 52 are communicated with each other to take the acidic water from the acidic water intake channel 52.

Then, the control unit 22 controls the electrode 20A.
Is switched to the cathode and the electrode 20B is switched to the anode, the pump 32 is stopped and the pump 40 is driven to add the electrolytic auxiliary agent solution 36 to the tap water in the branch tube 26.

In this case, since the alkaline water is generated in the polar chamber 14 and the acidic water is generated in the polar chamber 16, the drainage channel 42 and the alkaline water intake channel 50 are communicated with each other to make the alkaline water intake channel. While taking alkaline water from 50,
The drainage channel 44 and the acidic water intake channel 52 are communicated with each other to take in the acidic water from the acidic water intake channel 52.

As a result, acidic water having a chlorine concentration corresponding to the types of the electrodes 20A and 20B can be obtained. In addition,
Regarding the method of supplying the electrolysis auxiliary agent 36 to the electrolytic cell 10,
The present invention shows an example, and one pump may be added to each of the branch tubes 24 and 26.

Therefore, in the present invention, a plurality of pairs of different types of electrodes are arranged in the electrolytic cell, and the application of voltage is switched for each pair of electrodes. Therefore, acidic conditions with different chlorine concentrations can be obtained without changing the electrolysis conditions. Water can be obtained with a single ion water generator.

[0028]

EXAMPLES As the electrodes 18A and 18B, ruthenium oxide-based and platinum iridium-based firing electrodes based on titanium having a low chlorine overvoltage are used, and electrodes 20A and 20B based on titanium and having a high chlorine overvoltage are used. Gold-plated electrodes were used. The following table shows the results of experiments conducted under the same electrolysis conditions.

As is clear from the results of this experiment, when the electrodes 18A and 18B having a small chlorine overvoltage were driven, the pH was
At 2.65, strong acidic water (anode water) having an effective chlorine concentration of 45 ppm can be obtained. This strongly acidic water can be effectively used as sterilizing water for medical equipment.

Also, the electrodes 20A and 20B having a large chlorine overvoltage.
When driving, the effective chlorine concentration is 1 at pH 2.60.
8 ppm of strongly acidic water (anode water) can be obtained. This strongly acidic water can be effectively used as water for disinfecting fingers.

In the embodiment, an example using two pairs of electrodes has been described, but three or more pairs of different types of electrodes may be used to obtain acidic water having a desired chlorine concentration.

The results of the examples are shown in Table 1. ORP in Table 1 represents the redox potential.

[0033]

[Table 1]

[0034]

As described above, according to the ionized water generator of the present invention, the electrodes are formed by a plurality of pairs of different types of electrodes, and the voltage application is switched for each pair of electrodes. Acidic water with different chlorine concentrations can be obtained with one ionized water generator without changing the electrolysis conditions.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an ionized water generator of the present invention.

[Explanation of symbols]

 10: Electrolyzer 12: Diaphragm for electrolysis 14, 16: Electrode chamber 18A, 18B, 20A, 20B: Electrode 22: Control part 32, 40: Pump 46, 48: Three-way valve

Claims (1)

[Claims] 1. Water is supplied into an electrolytic cell in which a diaphragm for electrolysis is provided between a cathode electrode and an anode electrode, and a voltage is applied to both electrodes to electrolyze the water so that acidic water and alkaline water are obtained. In the ionized water generator for generating in the above, the electrode is composed of a plurality of pairs of electrodes, and the electrodes of different types are formed for each pair of electrodes, and means for switching the voltage application for each pair of electrodes is provided An ionized water generator characterized by: