JPH09108674A - Electrolytic water generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the pH of electrolytic water without changing the outflow of the generated electrolytic water to be used. SOLUTION: A pH variable means (circulation pipe line 11e) capable of changing the pH of alkaline water generated in a cathode section 14b at the time of electrolyzing is provided and the pH of acidic water is changed without changing the outflow of the generated acidic water by consisting so as to enable to change the pH of acidic water generated in an anode section 14a based on the change of the pH of alkaline water by the pH variable means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for producing electrolyzed water such as acidic water and alkaline water containing hypochlorous acid, sodium hypochlorite and the like as main components and having a sterilizing action and a disinfecting action. The present invention relates to an electrolyzed water generator.

[0002]

2. Description of the Related Art An electrolyzed water production apparatus for producing electrolyzed water such as acidic water and alkaline water which contains hypochlorous acid, sodium hypochlorite, etc. as main components and has a sterilizing action and a disinfecting action. As one form, an electrolytic cell, a diaphragm having an ion permeability for partitioning the inside of the electrolytic cell into a first electrode chamber and a second electrode chamber, an anode arranged in the first electrode chamber, and A cathode provided in the second electrode chamber is provided, and saline solution supplied to both electrode chambers is electrolyzed between the both electrodes to generate acidic water in the first electrode chamber,
There is an electrolyzed water generator that generates alkaline water in the second electrode chamber.

Further, in the electrolyzed water producing apparatus, it is desirable that the electrolyzed water such as acidic water and alkaline water produced can be adjusted to a pH suitable for the purpose of use. As means for adjusting the pH of the electrolyzed water, means for adjusting the flow rate of the electrolyzed water by feeding back the pH of the electrolyzed water as disclosed in JP-A-6-63551 and JP-A-5-317857, As disclosed in Japanese Examined Patent Publication No. 5-34079, a means for calculating and adjusting pH based on the flow rate of electrolyzed water and the electrolysis current is known.

[0004]

By the way, these p
In the H adjusting means, as the pH of the electrolyzed water to be used is adjusted, the flow rate of the electrolyzed water increases or decreases, which makes the user feel uncomfortable. Therefore, the object of the present invention is to
Adjust the pH of electrolyzed water to be used by adjusting the pH of electrolyzed water on the non-use side
Is controlled by maintaining the amount of electrolyzed water to be used and maintained at the set amount without changing the amount of electrolyzed water to be used.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to an electrolytic cell, a diaphragm having an ion permeable capacity that divides the electrolytic cell into a first electrode chamber and a second electrode chamber, and the first electrode chamber. And an anode disposed in the second electrode chamber, and a cathode disposed in the second electrode chamber,
An electrolyzed water generator that electrolyzes the saline solution supplied to both electrode chambers between the electrodes to generate acidic water in the first electrode chamber and alkaline water in the second electrode chamber. In the above, a pH variable means capable of changing the pH of electrolyzed water generated in at least one of the electrode chambers is provided, and the pH of the electrolyzed water is changed in the other electrode chamber based on the pH change of the electrolyzed water by the pH varying means. P of generated electrolyzed water
It is characterized in that H can be changed.

[0006] In the apparatus for generating electrolyzed water according to the present invention,
The pH varying means is composed of a circulation supply means for circulating the electrolytic water generated in the one electrode chamber to the electrode chamber and an adjusting means for adjusting the pH of the electrolytic water circulating in the electrode chamber. You can

[0007]

In the electrolyzed water producing apparatus thus constructed, for example, when it is desired to increase or decrease the pH of acidic water, the pH changing means increases or decreases the pH of alkaline water. This increases or decreases the diffusion amount of cations such as sodium ions from the alkaline water side to the acidic water side,
As a result, the pH of the acidic water is increased or decreased. During this period, the amount of acidic water produced does not change at all, and the set amount is ensured.

Further, for example, when it is desired to increase or decrease the pH of alkaline water, the pH changing means increases or decreases the pH of acidic water. As a result, the diffusion amount of anions such as chlorine ions from the acidic water side to the alkaline water side is reduced, and as a result, the pH of the alkaline water is increased or decreased. During this period, the amount of alkaline water produced does not change at all, and the set amount is ensured.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the drawings. FIG. 1 shows an example of an electrolyzed water producing apparatus according to the present invention. The electrolyzed water generating device includes an electrolyzer 11,
Diaphragm 1 having ion permeability, which is disposed in the electrolytic cell 11.
2 and the first and second electrodes 13a and 13b.
1 is a diaphragm 12 inside the first electrode chamber 14a and the second electrode chamber 1
It is divided into 4b. The first electrode 13a is arranged in the first electrode chamber 14a, and the second electrode 13b is arranged in the second electrode chamber 1
It is arranged at 4b.

The electrolytic cell 11 is provided with supply pipe lines 11a and 11b and outflow pipe lines 11c and 11d connected to the first electrode chamber 14a and the second electrode chamber 14b, and the respective supply pipe lines 11a and 1d.
Dilute saline is supplied to each electrode chamber 14a, 14b through 1b, and each electrode chamber 14a, 14b through each outflow line.
It is configured so that the electrolyzed water generated in b can flow out.

Therefore, the three-way valves 15a, 15 are provided in the supply pipe line 11b and the outflow pipe line 11d on the second electrode chamber 14b side.
The circulation pipeline 11e is connected via b, and these pipelines 11b, 11d, and 11e constitute a circulation supply system passage of electrolytic water generated in the second electrode chamber 14b.
Further, a flow rate adjusting valve 16a is provided downstream of the three-way valve 15a in the supply pipeline 11b, and the circulation pipeline 11a is provided.
A pH sensor 16b is provided at e. Each three-way valve 1
5a and 15b, the flow rate adjusting valve 16a, and the pH sensor 16b are connected to the control device 17.

The relationship between the pH of the electrolyzed water that circulates under a predetermined electrolysis condition, the circulation flow rate, and the time is input to the control device 17, and the control device 17 is based on the detection signal from the pH sensor 16b. The flow path switching operation of the three-way valves 15a and 15b is controlled, and the flow rate adjusting operation of the flow rate adjusting valve 16a is controlled to change the pH of the circulating electrolytic water to an arbitrary value and set the pH to an arbitrary value. can do.

In the electrolyzed water producing apparatus having such a configuration, the first electrode chamber 14a can be set as the anode chamber and the cathode chamber by appropriately changing the polarities of the first electrode 13a and the second electrode 13b. The two-electrode chamber 14b can be set as a cathode chamber and an anode chamber in association with the first electrode chamber 14a. However, in the electrolyzed water generator shown in FIG. 1, the first electrode 13a is connected to the positive electrode of the DC power source 18 and the second electrode 13b is connected to the negative electrode of the DC power source 18, and the first electrode chamber 14a is connected to the anode chamber. The second electrode chamber 14b is configured as a cathode chamber.

In the electrolyzed water producing apparatus, the circulation system and control device 17 function as a pH varying means for the alkaline water produced in the second electrode chamber 14b, and the first electrode chamber 14a serves as the cathode chamber. When the two-electrode chamber 14b is configured as an anode chamber, it functions as a pH varying means for the alkaline water produced in the second electrode chamber 14b.

In the electrolyzed water generator thus constructed, for example, when it is desired to increase or decrease the pH of the acidic water, p
The pH of the alkaline water is increased or decreased by the H variable means. As a result, the diffusion amount of cations such as sodium ions from the alkaline water side to the acidic water side increases or decreases, resulting in an increase or decrease in the pH of the acidic water.

When it is desired to increase or decrease the pH of alkaline water, for example, the first electrode chamber 14a is a cathode chamber and the second electrode chamber 14b is an anode chamber. Thereby, the pH varying means functions as a pH varying means for the acidic water generated in the second electrode chamber 14b, and if the pH of the acidic water is increased or decreased by the pH varying means, the pH of the acidic water is changed from the acidic water side to the alkaline water side. Since the diffusion amount of anions such as chlorine ions is decreased, the pH of alkaline water is increased or decreased as a result.

In the electrolyzed water producing apparatus, an example in which the first electrode chamber 14a is an anode chamber and the second electrode chamber 14b is a cathode chamber will be specifically described.
The diluted salt solution is supplied to 4a and 14b to start the operation.
As a result, acidic water is generated in the first electrode chamber 14a, alkaline water is generated in the second electrode chamber 14b, and the generated electrolyzed water is supplied to the outflow conduits 11c and 11c.
drained through d. After that, the controller 17 is operated to control the operations of the three-way valves 15a and 15b and the flow rate adjusting valve 16a based on the detection signal from the pH sensor 16b, so that the acidic water having a desired pH is obtained. Electrode chamber 1
The pH of the alkaline water generated in 4b is adjusted to an arbitrary value.

For example, when it is desired to increase the pH of the acidic water, the pH of the alkaline water is adjusted to the set high value. As a result, sodium ions in the alkaline water in the second electrode chamber 14b increase, and the sodium ions permeate the diaphragm 12 and diffuse into the first electrode chamber 14a to raise the pH of the acidic water. Moreover, when it is desired to lower the pH of the acidic water, the pH of the alkaline water in the second electrode chamber 14b may be lowered. During this period, the amount of acidic water produced does not change at all, and the set amount is ensured.

When the alkaline water in the second electrode chamber 14b side is simply circulated while the acidic water generated in the first electrode chamber 14a side flows out during operation using the electrolyzed water producing apparatus, An experiment was performed to measure the change with time of the pH of the alkaline water and the change with time of the pH of the acidic water flowing out from the first electrode chamber 14a side accompanying the change with time. Table 1 shows the obtained results. However, in the experiment, 0.
Adopting 10 wt% dilute saline solution, the first electrode chamber 14a
To the second electrode chamber 14b at a flow rate of 2.5 l / min.
n, the current was electrolyzed at 15 A.

[0020]

[Table 1]

Referring to Table 1, the second electrode chamber 1 during electrolysis
It can be seen that when the alkaline water generated in 4b is circulated, the pH gradually increases with the passage of time, and the pH of the acidic water flowing out of the first electrode chamber 14a gradually increases accordingly. That is, the pH of the acidic water generated in the first electrode chamber 14a is p of the alkaline water in the second electrode chamber 14b.
It is understood that, depending on H, changing the pH of the alkaline water changes the pH of the acidic water accordingly. From this experimental result, by controlling the pH of the alkaline water on the second electrode chamber 14b side, the pH of the acidic water is increased or decreased without changing the outflow amount of the acidic water generated in the first electrode chamber 14a. It is understood that it is possible.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an example of an electrolyzed water generator according to the present invention.

[Explanation of symbols]

11 ... Electrolyzer, 11a, 11b ... Supply line, 11c, 1
1d ... Outflow pipe, 11e ... Circulation pipe, 12 ... Diaphragm, 13
a ... 1st electrode, 13b ... 2nd electrode, 14a ... 1st electrode chamber, 14b ... 2nd electrode chamber, 17 ... Control device.

Claims (2)

[Claims] 1. An electrolytic cell, a diaphragm having an ion permeable capacity for partitioning the inside of the electrolytic cell into a first electrode chamber and a second electrode chamber, and an anode arranged in the first electrode chamber. A cathode disposed in the second electrode chamber is provided, and saline solution supplied to both electrode chambers is electrolyzed between the both electrodes to generate acidic water in the first electrode chamber, and In the electrolyzed water producing apparatus for producing alkaline water in the second electrode chamber, a pH varying means capable of changing the pH of electrolyzed water produced in at least one of the electrode chambers is provided, and the pH varying means is the same. An electrolyzed water generation device characterized in that the pH of electrolyzed water generated in the other electrode chamber can be changed based on the change of the pH of electrolyzed water by. 2. The electrolyzed water producing apparatus according to claim 1, wherein the pH varying means includes a circulation supply means for circulating the electrolyzed water produced in the one electrode chamber to the electrode chamber, and the electrode chamber. An electrolyzed water production apparatus comprising an adjusting means for adjusting the pH of electrolyzed water circulating in the water.