JP2002045858A - Manufacturing method of electrolytic water and its manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly perform the stopping operation and the switching operation of an electromagnetic switching means by imparting high operation voltage to the electromagnetic switching means at a time of the start of electrolysis, a time of reopening of electrolysis and at a time of switching polarity, in a method for imparting voltage to both electrodes through the electromagnetic switching means to electrolyze water under low voltage and produce electrolytic water. SOLUTION: By imparting voltage v2 higher than electrolytic voltage v1 to both electrodes 13, 14 for a specified time at the time of the start of electrolysis, at the time of reopening electrolysis and at the time of switching polarity, and also feeding salt water c1 whose salt concentration is lower those in the range of electrolytic concentrations electrolytic concentration c2 by specified concentrations for a specified time to an electrolytic bath11, sufficiently higher operational voltage v2 is imparted to the electromagnetic switching means, thus the operation is securely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing electrolyzed water and an apparatus for producing electrolyzed water.

[0002]

2. Description of the Related Art As one method of producing electrolyzed water, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-315885, a salt water having a predetermined electrolytic concentration is supplied to an electrolytic cell having a pair of electrodes. In addition, there is a method in which a voltage set to a predetermined electrolysis voltage is applied to both electrodes through electromagnetic switching means to electrolyze salt water to generate electrolyzed water.

[0003] In the production method of this method, if the generation of electrolyzed water is performed continuously for a long time, salts or hydroxides such as calcium are precipitated in the electrolysis chamber and adhere to the electrode as scale, and the electrolysis water is electrolyzed. In order to cope with this, since the efficiency is lowered and the electrodes are deteriorated, in order to cope with this, an electromagnetic switch having a function of switching the polarity of the voltage applied to both electrodes is adopted as the electromagnetic switching means, and the generation of the electrolyzed water is temporarily interrupted. By alternately switching the polarity of the voltage applied to both electrodes and restarting the generation of electrolyzed water, means for suppressing and discharging salts and hydroxides such as calcium in the electrolysis chamber is employed. There is something.

[0004]

In the method for producing electrolyzed water of this type, when producing electrolyzed water having predetermined characteristics, if the concentration of salt water supplied at a constant flow rate is set to be high, the concentration of electrolyzed water can be increased. Can be electrolyzed under a low current by reducing the voltage applied to both electrodes. In the electrolysis under these conditions, an inexpensive power source can be used as compared with the case of applying a high voltage, and the consumption and deterioration of both electrodes can be suppressed to reduce their consumption costs. This is advantageous because the production cost can be greatly reduced.

[0005] Therefore, in the method of generating electrolyzed water of this type, it is required to set the voltage applied to both electrodes as low as possible to generate electrolyzed water at a low current. In order to cope with such a demand, the present inventor has attempted a method of generating electrolyzed water under a low current by setting the voltage applied to both electrodes to a low voltage as much as possible in the method of generating electrolyzed water of this type. However, the following problems were found.

That is, in the method of producing electrolyzed water of this type, when the electrolysis is started, when the electrolysis is restarted, or when the generation of the electrolyzed water is temporarily interrupted to switch the polarity of the voltage applied to both electrodes, etc.
Since an oxide film is formed on the switching contact of the electromagnetic switch that constitutes the electromagnetic switch, a high operating voltage is required to close or switch the electromagnetic switch, and the electrolysis voltage is set to a low voltage. In this case, an operating voltage for properly closing or switching the electromagnetic switching unit may not be obtained. In the method of generating electrolyzed water of this type, when the electrolysis voltage is set to an extremely low voltage in order to be as advantageous as possible, the electromagnetic switching means cannot perform a closing operation or a switching operation at the electrolysis voltage. The generation of electrolyzed water becomes impossible.

Accordingly, an object of the present invention is to provide a method for producing electrolyzed water in which the electromagnetic switching means can accurately perform a closing operation and a switching operation even if the electrolysis voltage is set as low as possible. The present invention provides a method for producing electrolyzed water advantageously, and also provides a producing apparatus for performing the producing method.

[0008]

According to the present invention, there is provided a method for producing electrolyzed water, comprising supplying a salt water having a predetermined electrolytic concentration to an electrolytic cell provided with a pair of electrodes, and applying electromagnetic switching means to both the electrodes. The present invention relates to a method for generating electrolyzed water by electrolyzing the salt water by applying a voltage set to a predetermined electrolysis voltage through the water.

Therefore, in the method for producing electrolyzed water according to the present invention, when the electrolysis voltage is applied to the two electrodes, a voltage higher than the electrolysis voltage by a predetermined pressure is applied to the two electrodes for a predetermined time; It is characterized in that salt water whose concentration is lower than the electrolytic concentration by a predetermined concentration is supplied to the electrolytic cell for a predetermined time.

In the method for producing electrolyzed water, a voltage higher than the electrolysis voltage by a predetermined pressure is applied to the two electrodes for a predetermined time at the start of electrolysis and when the electrolysis is restarted, and a predetermined concentration is applied to the electrolysis tank from the electrolysis concentration. Low salt water can be supplied for a predetermined time. Further, in a method for generating electrolyzed water in which the generation of electrolyzed water is temporarily interrupted and the polarity of the voltage applied to both electrodes is alternately switched to restart the generation of electrolyzed water, When switching,
A voltage higher than the electrolysis voltage by a predetermined pressure may be applied to the two electrodes for a predetermined time, and salt water having a predetermined concentration lower than the electrolytic concentration may be supplied to the electrolytic cell for a predetermined time.

An apparatus for producing electrolyzed water according to the present invention is an apparatus for carrying out the method for producing electrolyzed water according to the present invention, and supplies an electrolytic cell provided with a pair of electrodes to the electrolytic cell. A saltwater preparation means for adjusting the saltwater concentration, and an electromagnetic switch which operates by applying an operating voltage from a power supply and applies a voltage to the two electrodes, and the saltwater concentration to be supplied to the electrolytic cell is calculated from the electrolytic concentration. First control means for controlling the salt water preparation means to set the predetermined concentration to a low predetermined concentration for a predetermined time; and operating in conjunction with the salt water low concentration preparation operation of the salt water preparation means to apply an applied voltage to both electrodes by an electrolytic voltage. And a second control means for controlling the power supply so as to set a predetermined voltage higher than the predetermined voltage for a predetermined time.

In the electrolyzed water generating apparatus, when the electromagnetic switch has a function of switching the polarity of the voltage applied to the two electrodes, the voltage applied to the two electrodes of the power supply is controlled as third control means. And a control means for controlling the electromagnetic switch so as to switch the polarity of the voltage applied to both electrodes by operating in conjunction with the setting operation to the high voltage.

[0013]

According to the method and apparatus for producing electrolyzed water according to the present invention, the voltage applied to both electrodes at the time of starting electrolysis, resuming electrolysis, and / or switching the polarity of both electrodes, etc. Is set to a predetermined voltage higher than the electrolysis voltage, it is possible to apply an operation voltage sufficiently higher than the electrolysis voltage to the electromagnetic switching means (electromagnetic switch).
For this reason, even when the electrolysis voltage is set to a voltage as advantageous as possible and the electrolyzed water is generated under a low current, a sufficient operating voltage is applied to the electromagnetic switching means, so that the electromagnetic switching means is accurately provided. It operates and applies a voltage to both electrodes, whereby the generation of electrolyzed water can be started or restarted smoothly.

As described above, when the voltage applied to both electrodes is higher than the electrolysis voltage, the voltage applied to both electrodes is instantaneously increased to a high voltage for a predetermined time to form an excessive electrolysis state. However, while an excessive electric load is applied to both electrodes, while the applied voltage to both electrodes is high, the concentration of the salt water supplied to the electrolytic cell is changed in accordance with the change in the applied voltage. Since it is set low, the occurrence of an excessive electrolysis state is prevented, and an excessive electric load on both electrodes is eliminated.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows an electrolyzed water generating apparatus according to an example of the present invention. The electrolyzed water generation apparatus is an apparatus for performing the electrolyzed water generation method according to the present invention, and includes an electrolyzed water generation mechanism 10, a saltwater preparation mechanism 20, a power supply mechanism 30, and a control device 40. I have.

The electrolyzed water generating mechanism 10 includes an electrolyzer 10a and a switching valve 10b. The electrolytic cell 10a is a diaphragm electrolytic cell. The electrolytic cell 10a is composed of a cell main body 11, a diaphragm 12 disposed at the center of the cell main body 11, and dividing the cell main body 11 into two electrolytic chambers R1 and R2. , R2 and a pair of electrodes 13 and 14, and each of the electrolysis chambers R1 and R2 has:
The salt water supply pipes 27a and 27b that constitute the salt water preparation mechanism 20 described below are connected to portions below these, respectively. Outflow pipes 15a and 15b are connected to portions above the electrolysis chambers R1 and R2.

The switching valve 10b includes a valve body 16 and the switching valve body 1.
7 and each of the outflow conduits 15a, 15
5b is connected to each of the discharge conduits 18a and 18b.
In the switching valve 10b, the switching operation of the switching valve body 17 causes each of the outflow conduits 15a, 15b and each of the discharge conduits 18a, 1.
8b is selectively connected, and when the switching valve body 17 is in the operating state shown by the solid line in the figure, the discharge line 18a and the outlet line 15a are connected to each other, and the discharge line 18b and the outlet line 15b are connected to each other. In the operating state shown by the two-dot chain line in the figure, the discharge line 18a and the outflow line 15b are connected to each other, and the discharge line 18b and the outflow line 15a are connected.
Are connected to each other.

The salt water preparation mechanism 20 includes a concentrated salt water tank 21,
It comprises a concentrated salt water supply line 22, a salt water supply pump 23, a water supply line 24, a water supply valve 25, a concentration adjusting line 26, and salt water supply lines 27a and 27b. The concentrated salt water tank 21 stores a saturated salt solution, and is connected to a water supply line 24 via a concentrated salt water supply line 22. The concentrated salt water supply line 22 is provided with a salt water supply pump 23. The water supply pipe 24 is provided with a water supply valve 25.
The concentration adjusting line 26 is a line downstream of a connection portion between the concentrated salt water supply line 22 and the water supply line 24, and each of the salt water supply lines 27 a and 27 b is located downstream of the concentration adjusting line 26. Each branch is branched from the side end. Salt water supply pump 23
Is a type in which the discharge flow rate is variable, and the water supply valve 25 is an open / close type in which a constant flow rate is discharged.

The power supply mechanism 30 comprises a DC power supply 31 and an electromagnetic switch 32. The electrodes of the DC power supply 31 are connected to the electrodes 13 and 14 in the electrolytic cell 10 via the electromagnetic switch 32. The DC power supply 31 is of a variable voltage type in which the applied voltage is variable, and the electromagnetic switch 32 functions to switch the polarity of the applied voltage to each of the electrodes 13 and 14 by switching operation. The DC power supply 31 and the electrodes 13 and 14 are open and cut off, and the power supply is activated and closed by turning on the power, and the DC power supply 31 and the electrodes 13 and 14 are connected.

The control device 40 is of a built-in timer type that integrates the first control means, the second control means, and the third control means in the present invention, and switches the switching valve body 17 of the switching valve 10a. It controls the discharge amount of the salt water supply pump 22 variably, controls the opening and closing of the water supply valve 25, variably controls the voltage applied to the DC power supply 31, and controls the switching of the electromagnetic switch 32. The control device 40 receives, as a signal, a current value from a current sensor 33 interposed in a connection circuit that connects the electromagnetic switch 32 and the electrode 14.

The control device 40 is operated by turning on the power supply of the electrolyzed water generating device to open the water supply valve 25 and to drive the salt water supply pump 23 to make the salt water preparation mechanism 20 perform the salt water preparation operation. By operating the electromagnetic switch 32, a predetermined voltage is applied to both electrodes 13 and 14 in the electrolytic cell 10a, and the switching valve 10b is operated.

Thus, in the electrolyzed water generating apparatus, the salt water prepared by the salt water preparing mechanism 20 passes through each of the salt water supply pipes 27a and 27b and each of the electrolytic chambers R of the electrolytic cell 10a.
The salt water supplied to R1 and R2 and supplied to each of the electrolysis chambers R1 and R2 is electrolyzed and flows out of each of the discharge pipes 18a and 18b through the switching valve 10b as electrolyzed water. In this case, since the electrolytic cell 10a is a diaphragm type electrolytic cell, acidic water is generated in the electrolytic chamber on the positive electrode side (for example, the electrolytic chamber R1), and the acidic water flows out through the discharge pipe 18a and flows out on the negative electrode side. In the electrolytic chamber (for example, the electrolytic chamber R2), alkaline water is generated, and the alkaline water flows out through the discharge line 18b.

In the electrolyzed water generating apparatus, the electrolyzer 1
When the polarity of the voltage applied to the two electrodes 13 and 14 in 0a is switched and the switching valve 10b performs a switching operation, the electrolytic chamber on the positive electrode side becomes, for example, an electrolytic chamber R2 due to the switching.
And the electrolytic chamber on the negative electrode side is changed to, for example, electrolytic chamber R1, the acidic water generated in electrolytic chamber R2 flows out through discharge line 18a, and the alkaline water generated in electrolytic chamber R1 is changed to It flows out through the discharge line 18b. Then
In the electrolyzed water generation device, the control device 40 is set to control each component as described below.

The control device 40 is activated by turning on the power supply of the electrolyzed water generating device, opens the water supply valve 25 and drives the salt water supply pump 23 to cause the salt water preparation mechanism 20 to perform the salt water preparation operation. In this case, when starting the electrolysis, the discharge amount of the salt water supply pump 23 is controlled to a set low amount to adjust the salt water concentration to a predetermined low concentration, and after a predetermined time has elapsed, the discharge amount of the salt water supply pump 23 is set. The salt water concentration is adjusted to a predetermined high concentration by controlling the concentration to a predetermined high amount. In the electrolyzed water generator, the high concentration of salt water is set as the electrolyzed concentration. FIG. 2 shows an example of a time chart of the salt water concentration prepared by the salt water preparation mechanism 20. The salt water concentration is low for a predetermined time t2 from the start of electrolysis t2, for example, 10 seconds, for example, for a low concentration c1 (for example, 10 seconds). 0.2 wt%),
Thereafter, a higher electrolytic concentration c2 (for example, 0.6 wt.
%). The salt water having an electrolytic concentration of c2 is, for example, 12
Electrolysis is continued for a period of time.

During this time, the control device 40 controls the current sensor 3
3, the salt water concentration at which the electrolytic current value between the electrodes 13 and 14 becomes constant is calculated, and the discharge amount of the concentrated salt water from the salt water supply pump 23 is finely adjusted so as to secure this salt water concentration. adjust. In the electrolyzed water generating apparatus, the electrolysis state is set to one cycle (time t1 to t3), the electrolysis operation is temporarily interrupted, the polarities of voltages applied to the electrodes 13 and 14 are switched to each other, and the electrolysis operation is restarted t4. . In the restarted electrolysis operation, the operation is controlled to the same salt water concentration as in the above-described one cycle, and the salt water concentration is adjusted to a predetermined low concentration c1 when the operation is restarted, and is adjusted to the electrolytic concentration c2 at t5 after a predetermined time has elapsed. Thus, the electrolysis operation is continued. Note that the control device 40 controls the salt water supply pump 23 during the suspension of the electrolysis operation.
Is stopped, and only water is supplied to the electrolytic cell 10a.

The control device 40 operates the electromagnetic switch 32 at the same time that the salt water preparation mechanism 20 performs the salt water preparation operation,
The set high voltage is applied from the DC power supply 31 to both the electrodes 13 and 14, and the DC power supply 31 is operated after a lapse of a predetermined time to apply the set low voltage to the electrodes 13 and 14. FIG. 3 shows an example of a time chart of controlling the voltage value applied to both electrodes 13 and 14 during operation of the electrolyzed water generating apparatus. This time chart corresponds to the time chart for controlling the salt water concentration shown in FIG. 2, and the voltage applied to both electrodes 13 and 14 is a high voltage v2 ( (At least 5 V), and then set to a lower electrolysis voltage v1. The electrolysis of the salt water having the electrolysis concentration c2 is continued at the electrolysis voltage v1, for example, for 12 hours. During this time, the control device 40 maintains the operating state of the electromagnetic switch 32.

In the electrolyzed water generating apparatus, the electrolysis state is set to one cycle (time t1 to t3), and then the electromagnetic switch 32 is opened to temporarily stop the electrolysis operation, and then the electromagnetic switch 32 is switched. Then, the polarity of the voltage applied to both electrodes 13 and 14 is switched to each other to restart the electrolysis operation.
I do. In the restarted electrolysis operation, the operation is controlled at the same applied voltage as in the above-described one cycle, and the applied voltage is adjusted to a predetermined high voltage v2 when the operation is restarted, and is adjusted to the electrolysis voltage v1 at t5 after a predetermined time has elapsed. The electrolytic operation is continued.

As described above, according to the electrolyzed water generating apparatus, the voltage applied to both electrodes 13 and 14 at the time of starting electrolysis, restarting electrolysis, and switching the polarity is set to a predetermined voltage v2 higher than electrolysis voltage v1. Because of the setting, the operating voltage v2 sufficiently higher than the electrolytic voltage v1 can be applied to the electromagnetic switch 32. Therefore, even when the electrolysis water is generated under a low current by setting the electrolysis voltage to the lowest voltage v1 as advantageous as possible, the electromagnetic switch 32 operates during the operation of the electromagnetic switch 32.
In the electrolyzed water generating apparatus, a sufficient operating voltage v2 can be applied to operate the apparatus accurately, and the electrolytic operation can be started and restarted smoothly.

Further, in the electrolyzed water generating apparatus, when the electrolysis is started, when the electrolysis is restarted, and when the polarity is switched, both electrodes 1
The voltages applied to the switches 3 and 14 instantaneously change for a predetermined time (t2-
During t1) and (t5−t4), the high voltage v2 may be generated to form an excessive electrolysis state, and an excessive electrical load may be applied to both electrodes 13 and 14. While the voltage is at the high voltage v2, the electrolytic cell 10a
Since the concentration of the salt water supplied to the electrode is set to the low concentration c1 in accordance with the change in the applied voltage, the occurrence of an excessive electrolysis state is prevented, and the excessive electrical load on the electrodes 13 and 14 is eliminated. be able to.

[Brief description of the drawings]

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

FIG. 2 is a time chart of the salt water concentration control in the electrolyzed water generation device.

FIG. 3 is a time chart of controlling an applied voltage to both electrodes in the electrolyzed water generating apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electrolysis water production | generation mechanism, 10a ... Electrolysis tank, 10b ... Switching valve, R1, R2 ... Electrolysis chamber, 11 ... Tank body, 12 ... Septum, 1
3, 14 ... electrode, 15a, 15b ... outflow line, 16 ... valve body, 17 ... switching valve body, 18a, 18b ... discharge line, 2
0 ... salt water preparation mechanism, 21 ... concentrated salt water tank, 22 ... concentrated salt water supply line, 23 ... salt water supply pump, 24 ... water supply line,
25: Water supply valve, 26: Concentration adjusting pipeline, 28a, 27b ...
Salt water supply line, 30: power supply mechanism, 31: DC power supply,
32: electromagnetic switch, 33: current sensor, 40: control device.

Claims (5)

[Claims] 1. An electrolytic cell provided with a pair of electrodes is supplied with a salt water set at a predetermined electrolytic concentration, and a voltage set at a predetermined electrolytic voltage is applied to both electrodes through an electromagnetic switch. In the method of electrolyzing the salt water to generate electrolyzed water, when applying the electrolysis voltage to the two electrodes, a voltage higher than the electrolysis voltage by a predetermined pressure is applied to the two electrodes for a predetermined time, and Wherein a salt water having a predetermined concentration lower than the electrolytic concentration is supplied for a predetermined time. 2. The method for producing electrolyzed water according to claim 1, wherein a voltage higher than the electrolysis voltage by a predetermined pressure is applied to the two electrodes for a predetermined time at the start of electrolysis and at the restart of electrolysis, and
A method for producing electrolyzed water, comprising supplying salt water having a predetermined concentration lower than the electrolytic concentration to the electrolytic cell for a predetermined time. 3. The method for producing electrolyzed water according to claim 1, wherein the method for producing electrolyzed water is performed by temporarily interrupting the generation of electrolyzed water and alternately switching the polarity of a voltage applied to the two electrodes. A method for producing electrolyzed water that resumes production of
At the time of switching the polarity of the applied voltage to both electrodes, a voltage higher than the electrolysis voltage by a predetermined pressure is applied to both electrodes for a predetermined time,
In addition, a method for producing electrolyzed water, comprising supplying salt water having a predetermined concentration lower than the electrolysis concentration to the electrolysis tank for a predetermined time. 4. An electrolyzed water generating apparatus for performing the electrolyzed water generating method according to claim 1, 2 or 3, wherein the electrolyzed water is supplied to the electrolyzer provided with a pair of electrodes and the electrolyzer. A saltwater preparation means for adjusting the saltwater concentration, and an electromagnetic switch which operates by applying an operating voltage from a power supply and applies a voltage to the two electrodes, and the saltwater concentration to be supplied to the electrolytic cell is calculated from the electrolytic concentration. First control means for controlling the salt water preparation means to set the predetermined concentration to a low predetermined concentration for a predetermined time; and operating in conjunction with the salt water low concentration preparation operation of the salt water preparation means to apply an applied voltage to both electrodes by an electrolytic voltage. A second control means for controlling the power supply so as to set a predetermined voltage higher than the predetermined voltage for a predetermined time. 5. The apparatus for generating electrolyzed water according to claim 4, wherein said electromagnetic switch has a function of switching the polarity of a voltage applied to both electrodes, and a high voltage applied to both electrodes of said power supply. A third control means for controlling the electromagnetic switch so as to switch the polarity of the voltage applied to both electrodes by operating in conjunction with the setting operation of the electrolyzed water.