JPH0739877A - Multistage electrosyzed ionized water forming device - Google Patents

Abstract

PURPOSE:To provide a multistage electrolyzed ionized water forming device where the electrolysis efficiency of water is improved to reduce power consumption and also the generation of excess chlorine is prevented to make electrodes have long life and further electrolyzed ionized water of a required pH value is obtained. CONSTITUTION:Water flowing in an electrolysis vessel 1a at the prestage side is electrolyzed in the electrolyzer 1a, where acidic ionized water is formed on the anodic plate 5a side and on the other hand, alkaline ionized water is formed on the cathodic plate 5b side. Here, for example, when the acidic ionized water is caused to flow in an electrolysis vessel 1b at the next stage, water solution of sodium chloride is added to the acidic ionized water from a halogenide addition device 10. In this way, the electrolysis efficiency of the acidic ionized water is improved in the electrolyzer 1b at the next stage and strong acidic ionized water is efficiently electrolyzed with a little power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-stage electrolytic ionized water producing apparatus for producing electrolyzed ionized water produced in a preceding electrolytic bath in a subsequent electrolytic bath to produce various kinds of electrolytic ionized water having different PH values. It is about.

[0002]

2. Description of the Related Art Conventionally, as this type of multi-stage electrolytic ionized water generator, one disclosed in JP-A-1-262985 is known.

This multi-stage electrolytic ion generator has a plurality of electrolytic cells in which a pair of anodes and cathodes are opposed to each other, and the electrolytic cells are connected in series by piping.

According to this multi-stage electrolyzed ionized water generator, when a voltage is applied between the electrodes and raw water such as tap water is made to flow from the electrolytic bath at the previous stage to the electrolytic bath at the next stage, this tap water is used. Is electrolyzed in the preceding electrolyzer to produce acidic ionized water on the anode side, while alkaline ionized water is produced on the cathode side. Here, for example, when the acidic ionized water is flown into the electrolytic cell of the next stage, the acidic ionized water is further electrolyzed in the electrolytic cell of the next stage. As a result, the PH value of the acidic ionized water further decreases on the anode side of the electrolytic cell at the next stage, and strongly acidic ionized water is produced.

On the contrary, when the alkaline ionized water produced in the electrolytic cell at the previous stage is fed to the electrolytic cell at the next stage, strong alkaline ionized water having a high PH value is supplied to the cathode side of the electrolytic bath at the next stage. Is generated.

[0006]

As described above, in the conventional multi-stage electrolytic ion water producing apparatus, while the acidic electrolyzed water and the alkaline ionized water which are not so strong are produced in the electrolytic cell in the previous stage, the strong acid is produced in the next stage. Soluble ion water or strong alkaline ion water is generated, and various ion water having different PH values are generated.

However, in order to obtain strongly acidic ionized water or strongly alkaline ionized water with this multi-stage electrolytic ionized water generator, the water itself is difficult to electrolyze, so a voltage above a predetermined level must be applied. However, there is a problem that the power consumption becomes very large.

Further, the strongly acidic ionized water or the strongly alkaline ionized water produced in the electrolytic cell at the next stage also changes the pH value of the ionized water when the flow rate flowing to the electrolytic cell is different even when the applied voltage level is constant. However, it has a drawback that ionic water having a desired PH value cannot be obtained. Especially when the flow rate of ionized water flowing to the next-stage electrolyzer is low,
It has a drawback that a large amount of chlorine is generated to corrode the electrode and shorten the life of the electrode.

In view of the above conventional problems, an object of the present invention is to improve the electrolysis efficiency of water to reduce power consumption, prevent excessive chlorine generation, and prolong the life of the electrode. It is an object of the present invention to provide a multi-stage electrolytic ionized water generator capable of obtaining ionized water having a desired PH value.

[0010]

In order to solve the above-mentioned problems, the present invention provides a plurality of electrolytic cells in which an anode and a cathode are arranged so as to face each other, connected in series by piping, and between the electrodes. In a multi-stage electrolytic ion water generator for generating electrolytic ion water by sequentially flowing water for electrolysis while applying a voltage to the electrolytic cell on the front stage side to the electrolytic bath on the next stage side from the electrolytic bath on the front stage side It is characterized in that a halide addition device for adding a halide such as sodium chloride to electrolytic ionized water flowing to the electrolytic cell on the next stage side is provided.

According to a second aspect of the present invention, in the multi-stage electrolytic ionized water producing device according to the first aspect, the electrolytic solution flowing from the electrolytic bath on the front stage side to the electrolytic bath on the next stage side and the halide addition device are supplied. And a rectifying member for rectifying the mixed liquid is provided downstream of the mixing chamber.

The invention according to claim 3 is claim 1 or claim 2.
In the multi-stage electrolytic ionized water generator described, a solenoid valve for supplying or stopping the halide, a PH sensor for detecting a PH value of electrolytic ionized water flowing out from the electrolytic cell on the next stage side, and a PH sensor for the PH sensor And a control means for varying the duty ratio of the solenoid valve based on the detection signal.

The invention of claim 4 is the invention of claim 1 or claim 2.
In the multi-stage electrolytic ionized water generator described, a solenoid valve for supplying or stopping the halide, a flow sensor for detecting the amount of electrolytic ionized water flowing in the electrolytic bath on the next stage side, and a detection signal of the flow sensor. Control means for varying the duty ratio of the solenoid valve based on the above.

[0014]

According to the first aspect of the present invention, the water flowing into the electrolytic cell on the upstream side is electrolyzed in this electrolytic cell to generate acidic ionized water on the anode side, while alkaline ionized water is generated on the cathode side. Is generated. Here, for example, when the acidic ionized water is flown to the electrolytic cell of the next stage, for example, an aqueous sodium chloride solution is added to the acidic ionized water from the halide addition device. As a result, the electrolysis efficiency of the acidic ionized water is improved in the electrolytic cell at the next stage, and the strongly acidic ionized water can be efficiently electrolyzed with a small amount of electric power.

Further, when the strong alkaline ionized water is produced, the alkaline ionized water produced in the electrolytic cell on the preceding stage side may be fed to the electrolytic cell on the next stage side. Addition of sodium chloride to ionized water improves the electrolysis efficiency of alkaline ionized water.

According to the second aspect of the present invention, the ionic water fed from the electrolytic cell on the upstream side is once collected in the mixing chamber, and the aqueous sodium chloride solution from the halide adding device is added to this mixing chamber. Thereby, the ionized water and the sodium chloride aqueous solution are efficiently mixed. The mixed electrolyzed ionized water is further rectified by the rectifying member and uniformly fed into the electrolytic bath on the next stage side.

According to the third aspect of the present invention, the PH value of the acidic ionized water electrolyzed in the electrolytic cell on the next stage is detected by the PH sensor. Here, when the PH value is higher than the set PH value, the duty ratio of the solenoid valve is increased, while when it is low, the duty ratio is decreased. As a result, acidic ionized water having the set PH value is generated.

On the other hand, when the alkaline ionized water is flowing through the electrolytic cell on the next stage and the PH value is higher than the set PH value, the duty ratio of the solenoid valve is lowered, and on the other hand,
On the contrary, when it is low, the duty ratio is increased. As a result, alkaline ionized water having the set PH value is generated.

According to the invention of claim 4, the flow sensor detects the amount of electrolytic ionized water flowing in the electrolytic cell on the next stage side. When the flow rate detected by the flow rate sensor is higher than the set flow rate, the duty ratio of the solenoid valve is increased, while when the detected flow rate is lower than the set flow rate, the duty ratio is decreased.

[0020]

1 to 6 show a first embodiment of a multi-stage electrolytic ion water producing apparatus according to the present invention, and FIG. 1 is a sectional view of the multi-stage electrolytic ion water producing apparatus.

In the figure, 1a is an electrolyzer at the previous stage, 1b is an electrolyzer at the next stage, and the electrolyzers 1a and 1b have the same structure. Each of the electrolytic cells 1a and 1b is formed by fastening an upper case 2a and a lower case 2b with a screw 3 to form an electrolytic chamber 4 in which tap water flows, for example. An anode plate 5a and a cathode plate 5b are installed above and below the electrolysis chamber 4 so as to correspond to each other, and a direct current is supplied to each of the plates 5a and 5b. Further, a water inlet 6 for introducing tap water is provided on the upstream side of the electrolysis chamber 4, while a splitting fluid 7 having a triangular cross section is provided on the downstream side.
Is fixed, and the anode plate 5a is provided below the divided fluid 7.
An acidic ionized water drainage port 8a for discharging the generated acidic ionized water is provided on the side, and the cathode plate 5b is provided on the upper side of the divided fluid 7.
An alkaline ionized water drain port 8b for discharging the generated alkaline ionized water is provided on the side. This front-stage electrolytic cell 1a
The acidic ionized water drainage channel 8a is connected to the water inlet 6 of the electrolytic cell 1b of the next stage by a pipe 9 so that the acidic ionized water of the electrolytic cell 1a of the previous stage flows into the electrolytic chamber 4 of the electrolytic cell 1b of the next stage. It has become.

A halide addition device 10 is connected in the middle of a pipe 9 connecting the electrolytic cells 1a and 1b. This halide addition device 10 is a tank 11 for storing an aqueous solution of a halide such as sodium chloride (NaCl).
have. As shown in FIG. 2, this sodium chloride has a function of increasing the electrolysis efficiency of water as the amount of the sodium chloride added increases, and as a result, has a function of generating strong acidic ionized water and strong alkaline ionized water with less electric power. . The tank 11 is opened to the atmosphere through the filter 12 and is connected to the pipe 9 through the manual adjusting valve 13 and the solenoid valve 14, and the sodium chloride aqueous solution in the tank 11 is connected through the manual adjusting valve 13 and the solenoid valve 14. It is designed to naturally flow down to 9.

The thus-configured multi-stage electrolytic ionized water generator is the acidic ionized water drainage port 8a of the electrolytic cell 1b of the next stage.
A PH sensor 15 for detecting a PH value is installed in the control unit 16, and the duty ratio of the solenoid valve 14 is controlled by a control unit 16 including a micro CPU or the like based on a detection signal of the PH sensor 15. Here, the duty ratio is obtained by dividing the opening time of the solenoid valve 14 by the total opening and closing time of the solenoid valve 14, and as the duty ratio becomes higher, the supply amount of sodium chloride in the halide addition device 10 increases. On the contrary, the supply amount of the sodium chloride aqueous solution decreases as the duty ratio decreases.

The operation of the multistage electrolytic ionized water producing apparatus according to this embodiment will be described with reference to FIGS. 1 and 3. That is, tap water for electrolysis flows into the electrolysis chamber 4 through the water inlet 6 of the electrolyzer 1a at the preceding stage, the tap water is electrolyzed by the voltage applied between the electrode plates 5a and 5b, and the electrolyzed water flows to the anode plate 5a side. Produces acidic ionized water, while alkaline ionized water is produced on the cathode plate 5b side. The acidic ionized water flows to the acidic ionized water drainage port 8a side by the divided fluid 7, while the alkaline ionized water is also divided by the divided fluid 7 and discharged from the alkaline ionized water outlet 8b.

This acidic ionized water flows through the pipe 9 to the water inlet 6 of the electrolytic cell 1b at the next stage. Here, this piping 9
Is supplied with the sodium chloride aqueous solution of the halide addition device 10, and the acidic ionized water is the one to which the sodium chloride aqueous solution is added.

This added acidic ionized water is used in the electrolytic cell 1b of the next stage.
Alkaline ionized water and acidic ionized water are generated by electrolysis in the above. However, since the acidic ionized water is added with sodium chloride, its electrolysis efficiency is improved and P
Strongly acidic ionized water having a low H value is produced. Here, the PH value L1 of the acidic ionized water is detected by the PH sensor 15 (S1). When the PH value L1 is higher than the set PH value L (S2), that is, when the acidic concentration is low, the duty of the solenoid valve 14 is reduced. The ratio is increased (S3) and the amount of sodium chloride added is increased. On the contrary, when the PH value L1 is lower than the set PH value L (S2), that is, when the acid concentration is high, the duty ratio of the solenoid valve 14 is lowered (S4),
Reduce the amount of sodium chloride added. As a result, the electrolysis efficiency of the acidic ionized water is further improved and desired strongly acidic ionized water is produced.

FIG. 4 shows the action of generating the strongly acidic ionized water by the change of the duty ratio and the change of the PH value. As is clear from this figure, the duty ratio is high in the early stage of the production of strongly acidic ionized water, and the electrolysis efficiency of acidic ionized water is increased to decrease the PH value, while when the PH value decreases to a predetermined value, the The duty ratio is kept low to generate a predetermined strongly acidic ionized water.

FIG. 5 is a graph showing the above-mentioned action of generating strongly acidic ionized water in terms of PH value and power consumption, in which the conventional example is shown by a broken line and the present example is shown by a solid line. As is apparent from FIG. 5, when comparing the conventional electric power W1 consumed for generating strongly acidic ionized water having a PH value of 3 and the electric power W2 of the present embodiment, W1> W2, This enables energy saving.

FIG. 6 is a graph showing the above-mentioned action of forming strongly acidic ionized water by changing the PH value and the amount of chlorine generated, and the solid line A shows the characteristic change of the acidic ionized water according to this embodiment. A one-dot chain line B shows a change in the chlorine generation amount according to the present embodiment, a broken line C shows a characteristic change of acidic ionized water when the flow rate is small in the conventional example, and a broken line D is acidic ion water when the flow rate is large in the conventional example. The change in the characteristics of water is shown, the broken line E shows the change in the chlorine generation amount when the flow rate is small in the conventional example, and the broken line F shows the change in the chlorine generation amount when the flow rate is large in the conventional example.

As is clear from these graphs, when the flow rate of acidic ionized water is low, the PH value is low, while the chlorine generation amount is high. On the contrary, when the flow rate of acidic ionized water is high, the PH value is high, while the chlorine generation amount is low. Here, in generating the strongly acidic ionized water, it is necessary to prevent generation of chlorine as much as possible and to obtain a predetermined PH value from the viewpoint of protecting the electrode plates 5a and 5b. In this embodiment, the addition of sodium chloride aqueous solution to acidic ionized water improves the electrolysis efficiency and suppresses the generation of chlorine even when the flow rate is small, so that this requirement is completely satisfied.

FIG. 7 shows a second embodiment of the multi-stage electrolytic ionized water producing apparatus according to the present invention. The feature of this embodiment is that the acidic ionized water drainage channel 8a of the electrolytic bath 1a of the preceding stage and the electrolytic solution of the next stage are electrolyzed. The point is that the tank 1b and the water inlet 6 are integrally formed.

That is, the acidic ionized water drainage channel 8a of the electrolytic bath 1a of the previous stage and the electrolytic chamber 4 of the electrolytic bath 1b of the next stage are connected to each other,
The mixing chamber 17 is formed in this communicating portion. Further, the same halide addition device 10 as in the first embodiment is connected to the mixing chamber 17, so that the acidic ionized water and the sodium chloride aqueous solution that have flowed into the mixing chamber 17 are confused with each other. . The mixed acidic ionized water thus mixed is passed through two rectifying plates 18 each having a small hole, and the electrolytic bath 1b of the next stage is passed through.
Flow into the electrolysis chamber 4.

According to this embodiment, each electrolytic cell 1a, 1b
Is integrated and is compact, and acidic ionized water and sodium chloride aqueous solution are uniformly mixed through the mixing chamber 17 and each rectifying plate 18, so that nonuniformity of electrolysis efficiency can be prevented. The other configurations and operations are similar to those of the first embodiment.

8 and 9 show a third embodiment of the multi-stage electrolytic ionized water producing apparatus according to the present invention. FIG. 8 is a control block diagram and FIG. 9 is a control flow chart. In the first and second embodiments, the PH value of the strongly acidic ionized water is detected and the duty ratio of the solenoid valve 14 is controlled. However, as explained in FIG. 6 of the first embodiment, the flow rate is large. In this embodiment, the PH value is high, and on the other hand, the PH value is low when the flow rate is low. In this embodiment, the flow rate of the acidic ionized water is detected to control the duty ratio of the solenoid valve 14.

That is, the flow sensor 19 is installed at the same position as the PH sensor 15 of the first embodiment, that is, at the acidic ionized water drainage port 8a of the electrolytic cell 1b at the next stage.
The duty ratio of the solenoid valve 14 is controlled by the control means 20 having a micro CPU based on the detection signal of. This control will be described with reference to FIG. 9. The flow rate Q1 of the acidic ionized water is detected by the flow rate sensor 19 (S
1) When the flow rate Q1 is larger than the set flow rate Q (S2), that is, when the PH value is high, the duty ratio of the solenoid valve 14 is increased (S3) and the amount of sodium chloride added is increased.
On the contrary, when the flow rate Q1 is smaller than the set flow rate Q (S2), that is, when the PH value is low, the duty ratio of the solenoid valve 14 is lowered (S4) and the amount of sodium chloride added is reduced. As a result, the electrolysis efficiency of the acidic ionized water is further improved and desired strongly acidic ionized water is produced. The duty ratio control by detecting the flow rate is particularly effective when the flow rate of tap water changes greatly. Other configurations and operations are similar to those of the first embodiment.

In each of the above-described embodiments, the acidic ionized water is electrolyzed twice in each of the electrolyzers 1a and 1b, so that normal alkaline ionized water (PH7 to 10;
(Ideal for drinking water) is produced, and strongly acidic ionized water (PH3 or less; optimal for sterilizing liquid) is produced in the electrolytic cell 1b at the next stage, but when the electricity to the electrode plates 5a and 5b is reversed, , Alkaline ionized water is electrolyzed twice, and strong alkaline ionized water (PH11 or more) is generated.

[0037]

As described above, according to the first aspect of the invention, since the halide is added to the electrolyzed ionized water electrolyzed in the electrolytic cell in the preceding stage, the electrolytic efficiency in the electrolytic cell in the next stage is improved. It is possible to improve, efficiently generate strong acidic or alkaline ionized water with a small amount of electric power, and prevent generation of excessive chlorine gas.

According to the second aspect of the present invention, the electrolytic ion water and the sodium chloride aqueous solution fed from the electrolytic cell on the upstream side are efficiently mixed and further rectified by the rectifying member to be uniformly distributed in the electrolytic cell on the next stage. Therefore, the electrolysis efficiency of the electrolyzed ionized water in the next-stage electrolyzer is further improved.

According to the third aspect of the invention, the PH sensor detects the PH value of the ionized water electrolyzed in the electrolytic cell on the next stage,
Since the duty ratio of the solenoid valve is controlled based on this detection signal, electrolytic ion water having a desired PH value can always be obtained.

According to the fourth aspect of the invention, the flow sensor detects the amount of electrolyzed ionized water flowing in the electrolytic cell on the next stage side, and the duty ratio of the solenoid valve is controlled based on this detection signal. Value of electrolyzed ionic water is always available.

[Brief description of drawings]

FIG. 1 is a sectional view of a multi-stage electrolytic ionized water generator according to a first embodiment.

FIG. 2 is a graph showing the relationship between changes in PH value and the amount of sodium chloride added.

FIG. 3 is a flowchart showing drive control of the multistage electrolytic ionized water generator according to the first embodiment.

FIG. 4 is a graph showing the action of generating strongly acidic ionized water by changing the duty ratio and changing the PH value.

FIG. 5 is a graph showing the relationship between changes in PH value and changes in power consumption.

FIG. 6 is a graph showing the action of generating strongly acidic ionized water as a change in PH value and a change in chlorine generation amount.

FIG. 7 is a sectional view of a multi-stage electrolytic ionized water generator according to a second embodiment.

FIG. 8 is a control block diagram of a multistage electrolytic ionized water generator according to a third embodiment.

FIG. 9 is a flowchart showing drive control of a multi-stage electrolytic ionized water generator according to a third embodiment.

[Explanation of symbols]

1a ... Electrolyzer on the front stage side, 1b ... Electrolyzer on the next stage side, 5a ...
Anode plate, 5b ... Cathode plate, 10 ... Halide addition device,
14 ... Solenoid valve, 15 ... PH sensor, 16 ... Control means, 1
7 ... mixing chamber, 18 ... straightening plate.

Claims (4)

[Claims] 1. An electrolytic cell having an anode and a cathode opposed to each other is connected in series by piping to apply a voltage between the electrodes, and water for electrolysis is supplied from the electrolytic cell on the front stage side to the electrolytic cell on the next stage side. In a multi-stage electrolytic ion water generator that sequentially flows into an electrolytic cell to generate electrolytic ion water, a halide such as sodium chloride is added to electrolytic ion water flowing from the electrolytic cell on the preceding stage side to the electrolytic cell on the next stage side. A multi-stage electrolytic ionized water generator characterized in that a halide addition device is provided. 2. A mixing chamber is provided for mixing an electrolytic solution flowing from the electrolytic bath at the front stage side to the electrolytic bath at the next stage side with a halide supplied from the halide adding device, and downstream of the mixing chamber. The multi-stage electrolytic ionized water production apparatus according to claim 1, wherein a rectifying member for rectifying the mixed liquid is provided on the side. 3. A solenoid valve for supplying or stopping the halide, a PH sensor for detecting a PH value of electrolyzed ionized water flowing out from the electrolytic cell at the next stage, and the electromagnetic sensor based on a detection signal of the PH sensor. The multistage electrolytic ionized water production apparatus according to claim 1 or 2, further comprising a control means for varying a duty ratio of the valve. 4. A solenoid valve for supplying or stopping the halide, a flow sensor for detecting the amount of electrolytic ionized water flowing in the electrolytic cell on the next stage side, and a solenoid valve for the solenoid valve based on a detection signal of the flow sensor. The multistage electrolytic ionized water production apparatus according to claim 1 or 2, further comprising: a control unit that varies a duty ratio.