JP2003225667A - Production equipment of electrolytic sterilized water and production method of electrolytic sterilized water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide production equipment capable of producing electrolytic sterilized water of a prescribed pH conveniently. <P>SOLUTION: This production equipment 100 of electrolytic sterilized water is provided with a diaphragm-type electrolyzer 10 which electrolyzes a chlorine compound added water across a diaphragm 13, a first pipe 21 which passes strong acidic electrolyzed water formed on the anode 11 side of the electrolyzer 10, a second pipe 22 which passes strong alkaline electrolyzed water formed on the cathode 12 side, a mixing tank 40 which is connected with each one end of the first pipe 21 and second pipe 22 and mixes the strong acidic electrolyzed water and strong alkaline electrolyzed water, a valve 30 which controls the flow rate of the strong alkaline electrolyzed water passing through the second pipe 22 and a valve controlling means which controls opening/closing time of the valve 30. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for producing electrolytic sterilized water and a method for producing electrolytic sterilized water. In particular, by electrolyzing water with added salt through the diaphragm,
The present invention relates to an apparatus and method for producing electrolytic sterilizing water containing acidic water generated on the anode side.

[0002]

2. Description of the Related Art Sterilization is a very serious problem in processing fresh foods such as fish and vegetables. Usually, sterilization is often performed with chlorine or ozone, but not only that, but there is also a method using electrolytic sterilization water. This electrolytic sterilized water contains acidic water produced on the anode side by electrolyzing water to which salts have been added through a diaphragm, and sterilization by electrolytic sterilized water is compared with other methods. It is environmentally desirable and is getting attention.

This electrolytic sterilized water is made to have a sterilizing power several to several tens of times higher than that of sodium hypochlorite (NaClO) which is generally used, by making the pH strongly acidic. It is known. Specifically, it is known that the sterilizing power when the pH is 2.0 and the effective chlorine concentration is set to 50 ppm is almost equal to the sterilizing power when the pH is 8.0 and the effective chlorine concentration is set to 200 ppm. ing. The conventionally known acidic electrolyzed water has a maximum effective chlorine concentration of 50 to 100 ppm, and theoretically has an effective chlorine concentration of about 200 to 400 ppm, but has the bactericidal activity of sodium hypochlorite. However, in practical use, effective chlorine is consumed due to the presence of organic substances, and as a result, the sterilizing power is lowered, and the theoretical sterilizing power may not be obtained depending on the sterilizing target.

In order to solve such a problem, the applicant of the present invention discloses in Japanese Patent Laid-Open No. 2000-185285.
Disclosed are electrolytic sterilized water and a manufacturing apparatus therefor capable of exhibiting sufficient sterilizing power even in the presence of organic substances.

[0005]

[Patent Document 1] Japanese Unexamined Patent Application Publication No.
The apparatus for producing electrolytic sterilized water disclosed in Japanese Patent Application Publication No. 000-185285 produces electrolytic sterilized water by partially discarding alkaline water through an orifice, a capillary, and a regulating valve, and then mixing it with acidic water. Therefore, it was newly found by the study of the inventors of the present application that it is extremely complicated to adjust the mixing ratio. That is, the pH of electrolytic sterilized water is adjusted by adjusting the mixing ratio, but the pH easily changes depending on the processing accuracy of the orifice and the capillary and the valve adjustment system. It was found that the change of the capillary diameter and the valve adjustment were necessary, and the adjustment took a very long time.

It has been found that it is very expensive to determine the design dimensions of the orifice and the capillary by trial and error (trial and error) and to place an order, and in addition to that, there is a problem of dust clogging in the orifice and the capillary. .

The present invention has been made in view of the above points, and its main object is to provide a manufacturing apparatus and a manufacturing method capable of easily manufacturing electrolytic sterilized water having a predetermined pH.

[0008]

A device for producing electrolytic sterilizing water according to the present invention comprises a diaphragm type electrolytic cell for electrolyzing chlorine compound-added water through a diaphragm and an anode side of the diaphragm type electrolytic cell. A first pipe that allows the generated strong acid electrolyzed water to pass therethrough, a second pipe that allows the strongly alkaline electrolyzed water generated at the cathode side of the diaphragm electrolyzer to pass, the first pipe and the second pipe. A mixing tank, which is connected to one end of each of the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water, a valve for adjusting the flow rate of the strongly alkaline electrolyzed water passing through the second pipe, And a valve control means for controlling the opening / closing time.

In a preferred embodiment, a take-out pipe for taking out the alkaline electrolyzed water is connected to the valve, and the valve control means controls a ratio of a time period when the valve is open and a time period when the valve is closed. And has a function of controlling the second valve during the time period when the valve is opened by the valve control means.
About 100% of the strong alkaline electrolyzed water that passes through the pipe
The strong alkaline electrolyzed water that passes through the extraction pipe and thereby does not substantially flow into the mixing tank and that passes through the second pipe during the time period when the valve is closed by the valve control means. Approximately 100% flows into the mixing tank.

In a preferred embodiment, the second pipe has a three-way branch portion that branches to the mixing tank side, the take-out pipe side, and the diaphragm type electrolytic cell side. The branch portion is provided at a position lower than the minimum liquid level at the time of mixing in the mixing tank, and the valve is provided at a position lower than the branch point of the three-way branch portion.

[0011] In a preferred embodiment, the valve (30) of the valve (30) is in a time zone when the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flowing into the mixing tank (40) are substantially mixed. Control for shortening the opening / closing time interval of the valve (30) in the initial time zone when the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flow into the mixing tank (40) as compared with the opening / closing time interval. The valve control means has a function of performing.

The mixing tank may be constructed by connecting a plurality of tanks in series.

The method for producing electrolytic sterilized water according to the present invention comprises the steps of electrolyzing chlorine compound-added water through a diaphragm to produce strongly acidic electrolyzed water and strongly alkaline electrolyzed water, and the strongly acidic electrolyzed water. And a step of mixing the strong alkaline electrolyzed water, a method for producing electrolytic sterilization water, the flow rate of the strong alkaline electrolyzed water mixed with the strong acid electrolyzed water, the strong alkaline electrolyzed water is It is controlled by the opening and closing time of the valve provided in the passage.

In a preferred embodiment, the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water are mixed in a mixing tank so that electrolyzed water having a predetermined pH (for example, a strongly acidic to weakly alkaline predetermined pH) is mixed. Electrolyzed water), and the strongly acidic electrolyzed water is allowed to pass through the mixing tank.
A pipe and a second pipe that allows the strong alkaline electrolyzed water to pass therethrough are connected, and in the path of the second pipe,
The valve is provided, and when the valve is open, the strong alkaline electrolyzed water is caused to flow into the mixing tank side,
The strongly alkaline electrolyzed water is drained when the valve is closed.

In a preferred embodiment, the valve (30) is operated at a time when the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flowing into the mixing tank (40) are substantially mixed. Control for shortening the opening / closing time interval of the valve (30) in the initial time zone when the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flow into the mixing tank (40) as compared with the opening / closing time interval. The valve control means has a function of performing.

According to the present invention, the pH can be adjusted by controlling the opening / closing time of the valve, so that electrolytic sterilized water can be easily produced. Therefore, the above object can be achieved.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION In order to solve the problems of the conventional electrolytic sterilizing water production apparatus disclosed in the above publication, the present inventor has
As a result of intensive training, even if the flow rate of the strongly alkaline electrolyzed water is not adjusted by the orifice, capillary, and adjustment valve,
The inventors have found that the pH can be satisfactorily adjusted even if the flow rate of the strongly alkaline electrolyzed water is adjusted by controlling the opening / closing time of the valve, and completed the present invention.

Embodiments according to the present invention will be described below with reference to the drawings. In the following drawings, for simplification of description, components having substantially the same function are designated by the same reference numeral. The present invention is not limited to the embodiments below.

FIG. 1 schematically shows the construction of an electrolytic sterilized water producing apparatus 100 according to an embodiment of the present invention.

The apparatus 100 for producing electrolytic sterilized water of this embodiment
Is a diaphragm type electrolytic cell 10 for electrolyzing chlorine compound-added water through a diaphragm 13, and a first pipe for passing a strongly acidic electrolyzed water generated on the anode (11) side of the diaphragm type electrolytic cell 10. 21 and the cathode (1
2) The second pipe 22 that allows the strong alkaline electrolyzed water generated on the side to pass therethrough. One end of each of the first pipe 21 and the second pipe 22 is connected to a mixing tank 40 in which the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water are mixed. The other ends of the first pipe 21 and the second pipe 22 are connected to the anode (11) side cell and the cathode (12) side cell of the diaphragm type electrolytic cell 10, respectively. Here, the pipes (21, 22) are pipes (or pipes) through which liquid can pass.
And includes tubes, hoses and the like.
It should be noted that it is preferably made of a material that is not corroded by acid or alkali.

A valve 30 for adjusting the flow rate of the strongly alkaline electrolyzed water is provided in the second pipe 22 through which the strongly alkaline electrolyzed water produced in the diaphragm type electrolytic cell 10 passes, and the valve 30 is a valve. Valve control means (not shown) for controlling opening / closing time
It is connected to the. The valve control means is, for example, a computer in which a program for controlling the valve opening / closing time is stored. As the valve 30, for example, an on-off valve or a switching valve can be used, and in this embodiment, an electromagnetic on-off valve is used. Further, as shown in FIG. 1, not only the valve 30 but also a valve 30 ′ for adjusting the flow rate of the liquid passing through the first pipe 21.
It is preferable to provide it together. To explain the reason, in the present embodiment, in order to extend the life of the diaphragm type electrolytic cell 10, the electrodes (11, 12) are arranged at regular intervals.
This is because there is a case where the polarities of are changed and the operation is performed.
That is, the activity of the electrodes (11, 12) gradually decreases with time due to scale adhesion to the surface, etc. Therefore, in order to maintain the surface activity, the activity of the electrodes (11, 12) is reduced at regular intervals. This is because the polarities may be exchanged, and therefore, strong alkaline electrolyzed water may be passed through the first pipe 21.

The anode 11 and the cathode 12 of the diaphragm type electrolytic cell 10 are electrically connected to a DC power source section 14. In the present embodiment, the DC power supply unit 14 is electrically connected to the AC power supply unit 15, but of course the AC power supply unit 1
5 may not be provided, and may be configured only with the DC power supply unit 14.
Further, in the present embodiment, a three-way branch portion 50 that branches to the mixing tank 40 side, the take-out pipe 25 side, and the diaphragm type electrolytic cell 10 side is provided in a part of the second pipe 22, and the take-out pipe 2 is provided.
Although the valve 30 is provided in the path toward the 5 side, the present invention is not limited to this, and as shown in FIG.
Valve 30 at the position of the branch between the waste liquid section (waste solution pipe 25) and
May be provided and the valve 30 may be a direction switching valve.

The chlorinated compound-added water is supplied to the diaphragm type electrolytic cell 10. The chlorinated compound-added water is added to the raw water 60 as a chlorinated compound (for example, salt or potassium chloride).
It is produced by adding. Specifically, from the electrolysis auxiliary material (salt or potassium chloride) 62 to saline (salt water)
Is prepared and stored in the saline supply unit 64, and the raw water 60
And saline solution are mixed to prepare an electrolytic solution (chlorine compound-added water) to be supplied to the diaphragm type electrolytic cell 10. This electrolytic solution is electrolyzed in the diaphragm type electrolytic cell 10 through the diaphragm 13 to generate strongly acidic electrolyzed water and strongly alkaline electrolyzed water.

If the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water are mixed at a ratio of 1: 1, they are weakly alkaline (p
H8 or more), it is necessary to reduce the flow rate of the strongly alkaline electrolyzed water as compared with the strongly acidic electrolyzed water in order to produce the slightly acidic electrolyzed water. In the present embodiment, the flow rate of the strongly alkaline electrolyzed water is controlled by opening / closing the valve 30. The opening / closing control of the valve 30 will be described with reference to FIG.

As shown in FIG. 3A, the opening and closing operations (and the open-close ratio) of the valve 30 are defined by time. In the “open” time zone in FIG. 3 (a), the strong alkaline electrolyzed water does not flow into the mixing tank 40 and is almost 100% drained. On the other hand, in the “closed” time zone in FIG. 3A, the water is not substantially drained,
Almost 100% flows into the mixing tank 40.

Looking at this in units of one cycle, FIG.
It becomes like (b). First, the strongly acidic electrolyzed water (strongly acidic water) passing through the first pipe 21 flows into the mixing tank 40 through one cycle. On the other hand, the strongly alkaline electrolyzed water (strong alkaline water) passing through the second pipe 22 is discharged when it is “open” and flows into the mixing tank 40 when it is “closed”. Therefore, the strongly alkaline electrolyzed water at the time of "closed" and the strongly acidic electrolyzed water for one cycle are mixed, whereby slightly acidic electrolyzed water is obtained. In other words, in one cycle of the control time, all the strong alkaline water enters the mixing tank 40 during the closing time, and all the waste water is discharged during the opening time. Here, since the amount of liquid flowing in the electrolytic cell is constant, by controlling the opening / closing time of the valve 30,
Finally, the ratio of the strongly acidic water and the strongly alkaline water entering the mixing tank can be made constant, and as a result, the pH can be adjusted. Since the opening / closing time of the valve 30 can be controlled by software by means of a valve control means (not shown), the pH can be adjusted very easily as compared with the conventional flow rate control using an orifice, a capillary or the like. .

Table 1 below shows the results of confirming the pH change by changing the opening / closing time of the valve 30 with one control time period of 30 seconds.

[0028]

[Table 1]

In the upper example, the valve (Valve) 30 is set to 5
The result is that the valve is opened for 2 seconds and closed for 25 seconds. On the other hand, in the lower example, the valve (Valve) 30 is opened for 6 seconds.
And the result is "closed" for 24 seconds.

As can be seen from Table 1, when the valve 30 is opened for a long time, the amount of alkaline water to be mixed decreases and the pH becomes acidic. Then, since the dilution rate becomes low, the effective chlorine concentration becomes high.

The control of the predetermined pH can be performed not only in the acidic range, but also in the range from strongly acidic to weakly alkaline. The degree of acidity is such that the valve 30 is open for 100% of the time ≥ The valve is open and the valve is closed for a predetermined ratio ≥ The valve 30 is open for 0 % Can be controlled in the order of the state, and the time period when the valve 30 is open is 10
The 0% state and the 0% time period when the valve 30 is open can be one of the processes of the present embodiment. Where the valve 30
The acidity is highest when the open time is 100% (p
H value is low; strong acidity), and the time period when the valve 30 is open is 0
%, The acidity is the lowest (pH value is high; weakly alkaline).

For better pH adjustment, see FIG.
As shown in, the mixing / waste liquid branch section (3 branch sections) 50 is
Lower than the minimum liquid level 42 of the mixing tank 40, the valve 30
(That is, the alkaline wastewater side valve) is preferably lower than the branch portion 30. With this configuration, the valve 3
When 0 is opened and the strong alkaline water is discharged, it is possible to prevent the strong alkaline water from flowing to the mixing tank 40 side, and as a result, it is possible to obtain the mixed liquid amount according to the mixing time ratio. It is possible to satisfactorily obtain the generation of pH.

On the contrary, as shown in FIG. 5, when the liquid level of the mixing tank 40 is set at the same position as or lower than the branch portion 50 and the valve 30 is set at a position higher than the branch portion 50, When 30 is opened, the strong alkaline water also flows to the side of the mixing tank 40, and there may occur a case where the amount of the mixed solution cannot be obtained according to the mixing time ratio.
It may happen that the production of H cannot be obtained well.
Therefore, it is preferable to adopt the configuration shown in FIG.

In Table 2 below, one control time period is 1 minute,
Then, in a configuration in which the mixing tank 40 has the same height as the branch portion 50, the height of the alkaline waste water port (22 ′) is set to be about 20 cm higher than the height of the electrolytic cell 10, and about 1 cm.
The result of having compared with the case where it lowered by 0 cm is shown.

[0035]

[Table 2]

From Table 2, when the height of the alkaline wastewater port (22 ') is increased, even if the valve 30 is opened, the alkaline water flows to the mixing tank 40 side, so that the pH becomes alkaline side. Therefore, it is preferable to have the configuration shown in FIG. 4 as described above.

Next, with reference to FIG. 6, a modification of the electrolytic sterilized water producing apparatus according to the present embodiment will be described. Figure 6
In the configuration shown in (2), a plurality of relatively small mixing tanks are connected in series (401, 402) instead of the mixing tank 40 (reference in the drawing). Here, each of the mixing tanks (401, 402) is a tank having a capacity smaller than the amount of liquid generated in the control interval time of the valve 30. Even if such small capacity tanks (401, 402) are used, it is possible to obtain the same pH adjusting ability as that of mixing in the tank 40 (reference in the drawing), which is larger than the liquid amount generated in the control interval time. . Further, by using the tank having a small capacity, there is an advantage that the apparatus volume can be reduced.

A more detailed description will be given. That is, by the method of adjusting the pH of the electrolyzed water by the opening time of the valve 30 in the present embodiment described above, the mixing tank (having a total volume equal to or more than the liquid amount generated during the control time of the valve 30 (for example, 1 minute) ( 401, 402), the tank (401, 40)
Since the predetermined strongly acidic water and the strongly alkaline water are mixed in 2), even with such a configuration, it is possible to easily adjust the liquid having the set pH. For example, if the control time of the valve 30 is 1 minute and 0.8 liter is generated in 1 minute, a large mixing tank 40 having a capacity of 0.8 liter is required. In the configuration shown in FIG. By connecting a plurality of tanks (401, 402) each having a volume much smaller than the predetermined volume in series, it is possible to obtain a liquid having a pH within a certain range as in the case of using a large tank (40). Therefore, when it is desired to reduce the volume of the device, the configuration shown in FIG. 6 is preferable.

Table 3 below shows the conditions under which one cycle of control time was 30 seconds and the amount of electrolyzed water (mixed water of strong acid and strong alkali) produced in 30 seconds was 400 mL, and the results were tested. It shows in FIG.

[0040]

[Table 3]

FIG. 7 shows one small tank (white circle; in Table 3,
The results of measuring the pH change by sampling about 200 mL of the pH of the electrolyzed water mixed and produced by the upper part) and two (black circles; lower part in Table 3) every 15 seconds are shown. It can be seen from FIG. 7 that the pH fluctuation range is smaller in the configuration in which two tanks are directly connected (black circle).

From the result of FIG. 7, p is set at the initial stage of generation.
It can be understood that the variation of H is large and the variation becomes small with the passage of time. Therefore, in the time period immediately after the generation, it can be derived that the pH can be set to a more constant value by making the control interval smaller, that is, by frequently mixing.

FIG. 8 shows a structure in which two tanks are connected in series, and one cycle of control time is 1 minute (of which 5 seconds is “open”) and 18 seconds (of which 3 seconds is “open”), and pH change is performed. The result of the observation is shown. From FIG. 8, as the control cycle is shortened, p
It can be seen that the H fluctuation range can be reduced. Therefore, the strongly acidic electrolyzed electrolyzed water and the strongly alkaline electrolyzed electrolyzed water flowing into the mixing tank 40 are substantially mixed as compared with the time zone at which the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water are substantially mixed (that is, the level at which the pH fluctuation range is reduced). It is preferable to shorten the opening / closing time interval of the valve 30 during the initial period of time when the water and the strongly alkaline electrolyzed water flow into the mixing tank 40 (that is, when the pH fluctuation range is large). For example, if the pH fluctuation range becomes small after the initial 18-second cycle (see FIG. 8).
In the above example, it is preferable that the period be 2 to 3 minutes), 30 seconds or 1 minute. A method incorporating a long cycle as well as a short cycle has an advantage that the life of the valves 30, 30 '(for example, solenoid valves) can be extended.

Although the present invention has been described above with reference to the preferred embodiments, it goes without saying that such description is not a limitation and various modifications can be made. That is, the above-described electrolytic sterilized water production apparatus and production method are merely examples, and modifications within a range that does not depart from the spirit and essence of the present invention are also included in the scope of the present invention.

[0045]

According to the present invention, the pH can be adjusted by controlling the opening / closing time of the valve, so that electrolytic sterilized water can be easily produced. If the 3-way branch of the second pipe is provided at a position lower than the minimum liquid level at the time of mixing in the mixing tank, and the valve is provided at a position lower than the branch point of the 3-way branch, open the valve. At this time, the strong alkaline electrolyzed water can be prevented from flowing to the mixing tank side, and as a result, the amount of the mixed liquid can be obtained according to the mixing time ratio, and the target pH can be favorably produced. be able to.

Further, by controlling the opening / closing time interval of the valve in the initial time zone to be shorter, the range of pH fluctuation can be reduced relatively early. In addition, when the mixing tank has a structure in which a plurality of tanks are connected in series, a tank having a relatively small capacity can be used, and thus the capacity of the device can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a configuration of an electrolytic sterilized water production apparatus 100 according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a modified example of the present embodiment.

3 (a) and 3 (b) are graphs for explaining opening / closing control of the valve 30. FIG.

FIG. 4 is a diagram showing a configuration of a modified example of the present embodiment.

5 is a diagram showing a configuration serving as a comparative example of the configuration shown in FIG.

FIG. 6 is a diagram showing a configuration of a modified example of the present embodiment.

FIG. 7 is a graph showing changes in pH in the configuration of one tank and two tanks.

FIG. 8 is a graph observing a pH change when one cycle of control time is 1 minute and 18 seconds.

[Explanation of symbols]

10 Diaphragm type electrolytic cell 11 Anode 12 cathode 13 diaphragm 14 DC power supply (DC power supply) 15 AC power supply (AC power supply) 21 First Pipe 22 Second pipe 25, 25 'Waste liquid pipe (take-out pipe, waste water part) 30, 30 'valve 40 mixing tank 401, 402 mixing tank 42 Minimum liquid level 50 branches 60 Raw water 62 Electrolysis auxiliary agent (salt) 64 Salt supply section 100 Electrolytic sterilizing water production equipment

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroyuki Kusama             1850-3 Hirookanomura, Shiojiri City, Nagano Prefecture Co., Ltd.             Within AR Systems F-term (reference) 4C058 AA21 BB07 EE26 JJ07                 4D061 DA03 DB07 EA02 EB05 EB12                       EB17 EB19 EB37 EB39 ED12                       ED13 GA22 GC19

Claims (8)

[Claims] 1. A diaphragm-type electrolytic cell (10) for electrolyzing water containing a chlorine compound through a diaphragm (13), and an electrolytic cell (10) produced on the anode (11) side of the diaphragm-type electrolytic cell (10). The first pipe (2) that passes the strongly acidic electrolyzed water
1), a second pipe (22) for passing strong alkaline electrolyzed water generated on the cathode (12) side of the diaphragm type electrolytic cell (10), the first pipe (21) and the second pipe Pipe (22)
A mixing tank (4) that is connected to one end of each of the above and mixes the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water.
0), a valve (30) for adjusting the flow rate of the strongly alkaline electrolyzed water passing through the second pipe (22), and a valve control means for controlling the opening / closing time of the valve (30). Sterilizing water manufacturing equipment. 2. A take-out pipe (25) for taking out the alkaline electrolyzed water is connected to the valve (30), and the valve control means sets a time period when the valve is opened and a time period when the valve is closed. In the time period when the valve (30) is opened by the valve control means, the strong alkaline electrolyzed water passing through the second pipe (22) has a function of controlling a ratio of approximately 100% of the take-out pipe. Passing through the second pipe (22) during the time period when the valve (30) is closed by the valve control means without substantially flowing into the mixing tank (40). The apparatus for producing electrolytic sterilized water according to claim 1, wherein substantially 100% of the strongly alkaline electrolyzed water flows into the mixing tank (40). 3. The three-way branch part (5) for branching the second pipe (22) to the mixing tank (40) side, the take-out pipe (25) side, and the diaphragm type electrolytic cell (10) side.
0), the three-way branch part (50) is provided at a position lower than the minimum liquid level (42) at the time of mixing in the mixing tank (40), and the valve (30) is The apparatus for producing electrolytic sterilized water according to claim 2, wherein the apparatus is provided at a position lower than a branch point of the three-way branch section (50). 4. The valve (3) in a time zone of a level at which the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flowing into the mixing tank (40) are substantially mixed.
0) compared with the opening / closing time interval, the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water are mixed in the mixing tank (40).
4. The valve control means according to claim 1, wherein the valve control means has a function of performing control for shortening an interval of opening / closing time of the valve (30) in an initial time period flowing into the. Electrolytic sterilized water manufacturing equipment. 5. The electrolytic sterilized water according to any one of claims 1 to 4, wherein the mixing tank (40) has a configuration in which a plurality of tanks (401, 402) are connected in series. Manufacturing equipment. 6. A step of producing strongly acidic electrolyzed water and strongly alkaline electrolyzed water by electrolyzing chlorine compound-added water through a diaphragm (13), respectively, and the strongly acidic electrolyzed water and strongly alkaline electrolyzed water. And a step of mixing the strongly alkaline electrolyzed water with a flow rate of the strongly alkaline electrolyzed water mixed with the strongly acidic electrolyzed water.
The method for producing electrolytic sterilized water, which is controlled by the opening / closing time of the valve (30) provided in 2). 7. The strong acidic electrolyzed water and the strong alkaline electrolyzed water are mixed in a mixing tank (40) to thereby become electrolyzed water having a predetermined pH, and the strong acid is stored in the mixing tank (40). The first pipe (21) for passing the electrolyzed electrolyzed water and the second pipe (22) for passing the strongly alkaline electrolyzed water are connected to each other, and in the path of the second pipe (22), the valve ( 30) is provided, and when the valve (30) is open, the mixing tank (4)
The method for producing electrolytic sterilized water according to claim 6, wherein the strongly alkaline electrolyzed water is caused to flow into the 0) side and the strongly alkaline electrolyzed water is drained when the valve (30) is closed. 8. The opening / closing time interval of the valve (30) in a time zone at which the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flowing into the mixing tank are substantially mixed, The interval between opening and closing times of the valve (30) in the initial time zone when the strongly acidic electrolyzed water and the strongly alkaline electrolyzed water flow into the mixing tank (40) is shortened. Method for producing electrolytic sterilized water.