JP3299644B2 - Electrolyzed water generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolyzed water generating apparatus for generating electrolyzed water by electrolyzing salt water between an anode and a cathode.

[0002]

2. Description of the Related Art Conventionally, there has been known an electrolyzed water generating apparatus of a type which electrolyzes a saline solution between two electrodes provided opposite to an electrolytic cell, and FIG. The concentrated salt water tank 70 for storing the concentrated salt water prepared by dissolving the water-soluble salt S, and the diluted salt water prepared by appropriately diluting the concentrated salt water supplied from the concentrated salt water tank 70 through the discharge pipe 71 are stored. A dilute salt water tank 72 is provided, and the dilute salt water in the dilute salt water tank 72 is sent out by pumps 80 and 81 to an electrolytic cell 90 to which a DC voltage is applied, and electrolysis is performed in the electrolytic cell 90 to continuously perform anode treatment. An electrolyzed water generator configured to generate acidic and alkaline water at 91 and cathode 92 is shown.

In the conventional electrolyzed water generator configured as described above, when the salt water is continuously used in the electrolytic cell 90, the level of the dilute salt water in the dilute salt water tank 72 drops.
Therefore, based on signals from a liquid level sensor 73 and a concentration sensor 74 for detecting the level and concentration of the dilute salt water in the dilute salt water tank 72, a control circuit (not shown) controls the dilute salt water tank 72.
The water supply valve 75 and the pinch valve 76 are operated in cooperation with each other so that the water level and the concentration of the dilute salt water therein are maintained at predetermined values or more. Thus, the diluted salt water tank 7
2 to maintain the concentration of the diluted salt water in the tank 2 properly.
When the concentrated salt water in the tank is supplied into the diluted salt water tank 72, the water level in the concentrated salt water tank 70 decreases. Then, when the liquid level sensor 77 in the concentrated salt water tank 70 detects a decrease in the level of the concentrated salt water, the control circuit opens the water supply valve 78 to replenish the water until the water level in the concentrated salt water tank 70 reaches the predetermined water level.

[0004]

In the conventional electrolyzed water generator, when the electrolyzed salt water is electrolyzed to generate electrolyzed water such as acidic water having a bactericidal action, the mineral content and hardness of the electrolyzed salt water are reduced. The physicochemical properties (eg, pH, redox potential) of the electrolyzed water obtained by the fluctuation are different. For example, when the mineral content of the salt water is large, the pH of the generated acidic water does not become sufficiently low, and it is not possible to obtain the acidic water having the intended effect. Such a change in the mineral content and hardness of the salt water is due to the difference in the mineral content and hardness of the raw water (for example, tap water and well water) used for preparing the diluted salt water. The generator has a problem that it is not possible to always generate electrolytic water having a constant physicochemical property in response to the fluctuation of the mineral content and the hardness.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electrolyzed water which can always supply electrolyzed water having constant physical properties even if the mineral content and hardness of raw water used for preparing the diluted salt water used for electrolysis are different. It is an object to provide a generating device.

[0006]

Was to achieve the above object, there is provided a means for solving]
Therefore, the present invention provides a method for controlling the concentrated salt water supplied from the concentrated salt water supply means.
Raw water such as tap water and well water supplied from an external water source
A diluted salt water tank for storing the diluted salt water diluted and adjusted,
The dilute salt water supplied from the dilute salt water tank is electrolyzed and
An electrolytic cell for producing a lysate, and stored in the dilute salt water tank.
Water level detection means for detecting the water level of the diluted salt water, and the water level detection
Controlling the supply amount of the raw water based on the value of the detection signal of the means.
The level of the dilute salt water stored in the dilute salt tank
Water supply control means for maintaining the water content within the range, and the diluted salt water tank
Salt water conductivity detector to detect the conductivity of diluted salt water stored inside
Output means and the value of the detection signal of the diluted salt water conductivity detection means.
Controlling the concentrated salt water supply means to the diluted salt water tank.
Concentrated salt water that maintains the concentration of the stored salt water within a specified range
An electrolyzed water generating apparatus provided with a supply control means,
Raw water that detects the conductivity of raw water supplied from an external water source
Conductivity detection means, and a detection signal of the raw water conductivity detection means.
The value of the detection signal of the diluted salt water conductivity detection means based on the value
Correction means for correcting the
To ensure that the physicochemical properties of the electrolyzed water
To provide an electrolyzed water generating apparatus characterized by
You.

[0007]

In the electrolyzed water generating apparatus according to the present invention, the dilute salt water in the dilute salt water tank is supplied to the electrolysis tank, and the level of the dilute salt water in the dilute salt water tank is reduced. When the water is detected by the position detection means, the water supply control means controls the water supply means to supply water into the dilute salt water tank. As a result, the concentration in the dilute salt water tank decreases. Then, when the diluted salt water conductivity detecting means detects that the conductivity of the diluted salt water in the diluted salt water tank has decreased, the concentrated salt water supply control means controls the concentrated salt water supply means to store the concentrated salt water in the diluted salt water tank. Is supplied.

At this time, the conductivity of the raw water supplied from the external water supply source is detected by the raw water conductivity detecting means, and the correcting means corrects the signal from the diluted salt water conductivity detecting means based on the detection signal. The concentration of the dilute salt water is adjusted, so that the physicochemical properties of the electrolytic water generated in the electrolytic cell are kept constant.

Therefore, according to the present invention, even if the mineral content and hardness of the raw water used for preparing the dilute salt water used for electrolysis are different, the electrolysis is performed based on the conductivity of the raw water supplied to the dilute salt tank. Since the concentration of the salt water is adjusted, the physicochemical properties such as the concentration, pH, and sterilizing ability of the electrolyzed water generated in the electrolytic cell can be constantly maintained.

[0010]

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of an electrolyzed water generating apparatus according to the present embodiment. The electrolyzed water generator includes a concentrated salt water tank 10 disposed above for preparing and storing a saturated saline solution (having a salt concentration of about 26%).
The diluted salt water (approximately 0.07%) prepared by appropriately diluting the saturated saline solution supplied from the concentrated salt water tank 10 through the discharge pipe 41 by operating the pinch valve 42 and disposed below the
Having a salt concentration of ) Is stored. The treated water stored in the dilute salt water tank 20 is introduced into the anode chamber 32 and the cathode chamber 33 of the electrolytic cell 30 through the treated water supply pipes 45 and 46 by the pumps 43 and 44, and is electrolyzed therein. To produce acidic water and alkaline water, and electrolyzed water of both amphoteric and acidic water and an alkaline water discharge pipe 48 and 4 respectively.
9.
(Note that the concentrated salt water tank 10, the discharge pipe 41, and the pinch valve 42 integrally correspond to the concentrated salt water supply means of the present invention.) The tank interior of the concentrated salt water tank 10 is divided into two chambers by a partition wall 11. And the first chamber 12 into which the salt S is introduced.
And a second chamber 13 into which the saturated saline solution generated in the first chamber 12 flows over the partition wall 11. In the second chamber 13, a float type liquid level sensor 14 for detecting that the level of the saturated saline solution stored in the second chamber 13 has become equal to or lower than the lower limit water level and equal to or higher than the upper limit water level is provided. The saturated saline solution in the second chamber 13 is supplied through the discharge pipe 41 to the diluted saline solution tank 2 as described above.
0 is supplied. On the other hand, the dilute salt water tank 20 has a float type liquid level sensor (2) for detecting that the level of the dilute salt water stored in the dilute salt water tank 20 has fallen below the lower limit water level and rises above the upper limit water level.
1: Corresponds to the diluted salt water level detecting means of the present invention. )When,
Dilute salt water conductivity detection sensor (2)
2: It corresponds to the diluted salt water conductivity detecting means of the present invention. ) Is provided.

Above these salt water tanks 10, 20, there are provided water supply valves (15, 23: external water supply source and water supply valve 23) for supplying raw water from an external water supply source (not shown), respectively. Is provided, and is configured to supply raw water when the stored salt water level falls below a predetermined water level. In addition, dilute salt water tank 2
A raw water conductivity detection sensor (24: corresponding to the raw water conductivity detection means of the present invention) is provided in the route for supplying raw water to 0, and the conductivity of the raw water used can be measured. It has become. An overflow pipe 47 is provided in communication with both of the salt water tanks 10 and 20. When the salt water in each of the salt water tanks 10 and 20 exceeds a predetermined amount, the overflow pipe 47 is provided.
It is configured to be able to discharge more.

The electrolyzed water generating apparatus includes a conventionally known electrolyzer 30. The electrolytic cell 30 has a diaphragm 31 inside.
Is divided into an anode chamber 32 and a cathode chamber 33 by
A pair of electrodes 34 and 35 are disposed opposite to each of the electrode chambers 32 and 33, and a DC power supply 51 is connected to the electrodes 34 and 35 via a voltage supply circuit 52.

The power switch SW1, the reference concentration setting switch SW2, the two liquid level sensors 14, 21, the diluted salt water conductivity detection sensor 22, and the raw water conductivity detection sensor 24 are connected to a control circuit 60. The control circuit 60 is constituted by, for example, a microcomputer, and repeatedly executes a program corresponding to the flowcharts shown in FIGS. 2 and 3 to provide two water supply valves 15, 23, a pinch valve 42, two pumps 43, 44, and control the operation of the voltage supply circuit 52.

Next, the operation of the embodiment constructed as described above will be described with reference to the flowcharts of FIGS. When the operation of the electrolyzed water generator is started by turning on the power switch SW1 (step 100), the control circuit 6
In step 102, the control circuit 60 operates the two water supply valves 15, 23 and the pinch valve 42 to store a predetermined amount of concentrated water in the concentrated salt water tank 10 by the liquid level sensor 14. The salt water and a predetermined amount of the salt water detected by the liquid level sensor 21 are stored in the salt water tank 20. When the concentrated salt water tank 10 and the diluted salt water tank 20 are filled with the salt water in this way, step 1
At 04, the control circuit 60 switches the voltage supply circuit 52 to apply the voltage from the DC power supply 51 to both electrodes 34, 35 of the electrolytic cell 30, and at the same time, activates the pumps 43, 44 to supply the diluted salt water tank to the electrolytic cell 30. 20 to supply treated water. Thereby, the electrolysis of the treated water is continuously performed in the electrolytic cell 30, and the acidic water is supplied from the anode chamber 32 to the cathode chamber 3.
At 3, alkaline water is generated. After starting the generation of the electrolyzed water in step 104, the control circuit 60 proceeds to step 10
The circulation processing consisting of 6 to step 118 is continuously executed.

Step 106 is a process for maintaining the level of the concentrated salt water in the concentrated salt water tank 10 within a predetermined range. The control circuit 60 controls the water supply valve 15 based on a signal from the liquid level sensor 14. Provide raw water from an external water source. When the level of the concentrated salt water in the concentrated salt water tank 10 is adjusted to a predetermined range in step 106, the control circuit 60
Advances the program to step 108.

The next circulation process consisting of steps 108 to 118 is a process for maintaining the level of the dilute salt water in the dilute salt water tank 20 within a predetermined range and adjusting the concentration of the dilute salt water to the corrected concentration. In this process, first, the control circuit 60 receives the electric conductivity σ ₁ detected by the dilute salt water conductivity detection sensor 22 provided in the dilute salt water tank 20 in step 108 and the dilute salt water tank 20 in step 110. Raw water conductivity detection sensor 2 provided in the water supply path to
Conductivity sigma ₂ detected by 4 is input. Then, in step 112, the control circuit 60 calculates a new corrected electric conductivity σ (= σ ₁ −σ ₂ ) by subtracting the electric conductivity σ _{2 of the} raw water from the input electric conductivity σ ₁ of the dilute salt water. , Step 112 corresponds to the correcting means of the present invention.) Subsequently, in step 114, the control circuit 60 derives the dilute salt water concentration C with respect to the corrected electric conductivity σ based on a table (see FIG. 4) provided in the control circuit 60. Next, in step 116, the reference density Co (for example, 0.07%) set by the reference density setting switch SW2 in step 116 is input to the control circuit 60. Then, the control circuit 60 determines in step 118 the control circuit 6 based on the input reference concentration Co, the derived dilute salt water concentration C, and the signal from the liquid level sensor 21.
0 executes a control routine for controlling the operation of the water supply valve 23 and the pinch valve 42.

As shown in detail in FIG. 3, the control routine starts to be executed at step 200. FIG. 5 shows the control states of the water supply valve 23 and the pinch valve 42 controlled by this control routine. The control circuit 60 determines whether the level h of the dilute salt water detected by the liquid level sensor 21 in step 202 is equal to or higher than the upper limit level, or lower than the lower limit level, or higher than the lower limit level and lower than the upper limit level (ie, (Within a predetermined range).

If the level h of the dilute salt water is lower than the lower limit level, it is determined in step 202 that “h <lower limit”, and the program proceeds to step 210. Step 2
In step 10, the diluted salt water concentration C derived in step 114 is compared with the reference concentration Co input in step 116, and the diluted salt water concentration C is set to the lower limit of the allowable error of the reference concentration Co (Co−ΔC). ), Or more than the upper limit of the allowable error of the reference density Co (Co + ΔC), or within the allowable error of the reference density Co (Co−
It is determined whether it is not less than ΔC and less than Co + ΔC), and the program proceeds to the corresponding steps 212, 216, and 214, respectively. In steps 212, 214, and 216, the control circuit 60 controls the water supply valve 23 and the pinch valve 42 to respective states (corresponding to the states 301, 304, and 307 in FIG. 5). Thereafter, the control circuit 60 advances the program to step 240 to end the series of control routines, and then returns the program to step 106.

If the dilute salt water level h is within the predetermined range, it is determined in step 202 that “lower limit ≦ h <upper limit”, the program proceeds to step 220, and the derived dilute salt water concentration C and the aforementioned Is compared with the input reference density Co in the same manner as in step 210.
If the result of the determination is that the diluted salt water concentration C is less than the lower limit of the allowable error of the reference concentration Co (Co−ΔC), or if the diluted salt water concentration C is the upper limit of the allowable error of the reference concentration Co (Co +
If ΔC) or more, the program proceeds to step 222 and step 224 (corresponding to state 302 and state 308 in FIG. 5), respectively, and the pinch valve 42
After performing the control in step 240, the control routine is ended in step 240. Further, the determination result in step 220 indicates that the concentration C of the dilute salt water is within the allowable error range of the reference concentration Co (C
If it is not less than o−ΔC and less than Co + ΔC), the program proceeds to step 240 and the control routine ends. Control circuit 6 following the end of the control routine
0 returns the program to step 106.

If the dilute salt water level h is equal to or higher than the upper limit water level, it is determined in step 202 that “h ≧ upper limit”, and the program proceeds to step 230, where the derived dilute salt water concentration C and the input The comparison determination with the reference density Co is performed in the same manner as in step 210, and the program is executed based on the determination result in step 232, step 2
34, proceed to step 236. This step 232,
In steps 234 and 236, the control circuit 60
Controls the water supply valve 23 and the pinch valve 42 to respective states (corresponding to the states 303, 306, and 309 in FIG. 5, respectively). Thereafter, the program proceeds to step 240 to end the series of control routines, and returns the program to step 106.

Next, an example of the control state of the water supply valve 23 and the pinch valve 42 when the program corresponding to the flowchart of this control routine is repeatedly executed will be described with reference to FIGS. First, in step 102, the dilute salt water is supplied to the electrolytic tank 30 from the dilute salt water tank 20 in which a predetermined amount of dilute salt water is stored, and the level of the dilute salt water in the dilute salt water tank 20 is reduced by the liquid level sensor 21. When detected, the control circuit 60 controls the water supply valve 23 to supply raw water into the dilute salt water tank 20. Thereby, the concentration of the dilute salt water in the dilute salt water tank 20 decreases. And
The dilute salt water level h is less than the lower limit water level and the dilute salt water concentration C
Is smaller than the lower limit of the allowable error of the reference concentration Co in steps 202 and 210, the control circuit 60 proceeds to step 212 in FIG. 3, that is, as shown in the state 301 in FIG. Then, both the pinch valve 42 and the pinch valve 42 are opened to supply raw water into the dilute salt water tank 20 from an external water supply source and concentrated salt water from the concentrated salt water tank 10. Then, when it is determined in steps 202 and 210 that the diluted salt water concentration C is equal to or more than the upper limit of the allowable error of the reference concentration Co while the diluted salt water level h is still lower than the lower limit water level, the control circuit 60 controls the water supply valve 23. Is closed, the pinch valve 42 is closed. In this case, the control state of the water supply valve 23 and the pinch valve 42 is changed from the state 301 in FIG. 5 (step 212 in FIG. 3) to the state 3.
After that, the state shifts to the state 307 (step 216).

In the state where the water supply valve 23 is opened and the pinch valve 42 is closed as shown in this state 307, if the control circuit 60 continues to supply the raw water from the water supply valve 23 to the diluted salt water tank 20, the dilution is continued. The salt water level h increases. Then, when it is determined in step 202 that the water level is equal to or higher than the upper limit water level, the control circuit 60 advances the program to step 236. Where dilute salt water concentration C
Remains above the upper limit of the allowable error of the reference density Co,
The program proceeds to step 236. This step 236 corresponds to the state 309 in FIG. 5, in which the water supply valve 23 is open regardless of the dilute salt water level h being equal to or higher than the upper limit water level, and the excess dilute salt water in the dilute salt water tank 20 overflows. It is discharged from the pipe 47. As a result, the concentration C of the dilute salt water in the dilute salt water tank 20 is promptly adjusted within the predetermined concentration range, and the state shifts to the state 306.

When raw water and concentrated salt water are supplied to the diluted salt water tank 20 (step 212, that is, state 3).
01), when the liquid level sensor 21 detects that the dilute salt water level h has become equal to or higher than the upper limit water level while the dilute salt water concentration C remains below the lower limit of the allowable error of the reference concentration Co, the control circuit 60 causes the control circuit 60 to operate. Only the water supply valve 23 is closed to stop the supply of raw water. That is, the control state of the water supply valve 23 and the pinch valve 42 is the state 301 in FIG. 5 (step 2 in FIG. 3).
12) through state 302 (step 222) to state 3
03 (Step 232).

In the state where the water supply valve 23 is closed and the pinch valve 42 is open as shown in a state 303 (step 232), the control circuit 60 continues to supply the concentrated salt water from the concentrated salt water tank 10 to the diluted salt water tank 20. If the supply is continued, the concentration C of the dilute salt water becomes high and becomes higher than the upper limit of the allowable error of the reference concentration Co. If the salt water level remains at or above the upper limit, the flow shifts to state 309 (step 236). In this state 309, as described above, the water supply valve 23 is open even though the dilute salt water level h is equal to or higher than the upper limit water level, and excess dilute salt water in the dilute salt water tank 20 is discharged from the overflow pipe 47. Is discharged.
As a result, the diluted salt water in the diluted salt water tank 20 is diluted, the concentration C of the diluted salt water is promptly adjusted to a predetermined concentration range, and the state shifts to the state 306.

In this control routine, when the dilute salt water is sent to the electrolytic cell 30, the dilute salt water level in the dilute salt water tank 20 drops. For example, the state 303 and the state 306 where the supply valve 23 is closed are changed. Then, the state shifts to the state 301 or the state 307 due to a decrease in the diluted salt water level.

As described above, the respective states shown in FIG. 5 shift to each other based on the determination results of step 202, step 210, step 220, and step 230. that time,
The water supply valve 23 in the states 302, 305, and 308 is kept open if the water supply valve 23 in the previous state is open, and is kept closed if the water supply valve 23 in the previous state is closed. Also, state 304, state 30
5. The pinch valve 442 in the state 306 is kept open if the pinch valve 42 in the previous state is open, and is kept closed if the pinch valve 42 in the previous state is closed.

By executing the control routine in this manner, the dilute salt water level in the dilute salt water tank 20 is between the lower limit water level and the upper limit water level, and the dilute salt water concentration C is within the allowable error range of the reference concentration Co (co-ΔC or more). (Less than Co + ΔC).
By the way, as described above, the dilute salt water concentration C is calculated from the electric conductivity σ ₁ detected by the dilute salt water electric conductivity detection sensor 22 by the processing of steps 108 to 114 to the electric conductivity σ ₂ detected by the raw water electric conductivity detection sensor 24. Is the diluted salt water concentration C corresponding to the new corrected electric conductivity σ calculated by subtracting. For example, when the mineral content contained in the raw water is large, the conductivity σ _{2 of the} raw water is larger than when the mineral content is small, so that the dilute salt water concentration C is smaller when the mineral content is large, and steps 210, 220,
By the determination at 230, the control is performed such that the conductivity σ _{1 of the} dilute salt water detected by the dilute salt water conductivity detection sensor 22 becomes larger than when the mineral content is small.

Therefore, according to this embodiment, even if the mineral content and hardness of the raw water supplied to the dilute salt tank 20 for preparing the dilute salt water used for electrolysis are different, the conductivity of the raw water is detected. Therefore, since the concentration of the salt water to be electrolyzed is adjusted based on the electric conductivity, the physicochemical properties such as the concentration, the pH, and the sterilization ability of the electrolyzed water generated in the electrolytic cell 30 must be constantly maintained. Can be.

In the above embodiment, the correction electric conductivity σ is calculated using the relationship shown in the graph of FIG. 4 on the assumption that the dilute salt water concentration C does not change even if the dilute salt water temperature T changes.
The dilute salt water concentration C was determined based only on this. Strictly speaking, however, the concentration C of the diluted salt water changes in relation to the electric conductivity and the temperature. Therefore, the concentration C of the diluted salt water may be determined based on the corrected electric conductivity σ and the temperature T of the diluted salt water. In this case, a temperature sensor Ts (indicated by a phantom line in FIG. 1) for detecting the temperature T of the dilute salt water is additionally provided in the dilute salt water tank 20 of the electrolyzed water generating apparatus shown in FIG. This sensor T
The control signal 60 from the control circuit 60 for executing a program in which the step 114 of the flowchart shown in FIG. 2 is replaced with the steps 114a and 114b shown in FIG.
It is led to. In the control circuit 60, FIG.
A table corresponding to the graph shown in FIG. 7 is provided instead of the table corresponding to the graph of FIG. For this reason, after the processing of steps 106 to 112, a detection signal indicating the temperature T from the temperature sensor Ts is input to the control circuit 60 in step 114a, and the control circuit 60 executes the processing based on the σ calculated in step 112. C is derived with reference to the table corresponding to the graph of FIG. As a result, according to this modification, the concentration C of the dilute salt water is accurately calculated, and thus the concentration and pH of the electrolytic water generated in the electrolytic cell 30 are adjusted.
Physicochemical properties such as sterilization ability can always be kept constant.

Further, in the above embodiment, the corrected electric conductivity σ is calculated, and the diluted salt water concentration C corresponding to the corrected electric conductivity σ is calculated.
And the reference density Co input by the reference density setting switch SW2 are compared and determined in steps 210, 220, and 230. The conductivity corresponding to the input reference density Co is derived and calculated. The water supply valve 23 and the pinch valve 42 are controlled so that the physicochemical properties of the electrolyzed water generated in the electrolytic cell 30 are kept constant based on the judgment result. You may make it.

Further, in the above embodiment, the electrolytic cell of the type separated into the two electrode chambers 32 and 33 by the diaphragm 31 is used as the electrolytic cell 30, but the electrolytic cell without the diaphragm may be used. .

Further, in the above embodiment, the liquid level sensor 14 or 21 which can detect that the salt water level has become lower than the lower limit water level and higher than the upper limit water level, respectively, is employed as the water level detecting means. However, using a liquid level sensor that can detect the salt water level as a water level detection means,
The detection signal may be compared with a signal indicating the lower limit water level and the upper limit water level by program processing to determine whether the salt water level is lower than the lower limit water level or higher than the upper limit water level.

In the above embodiment, the concentrated salt water supply means is constituted by the concentrated salt water tank 10, the discharge pipe 41, the pinch valve 42
Was constructed in a may be configured to supply the concentrated brine to dilute water tank from concentrated brine tank 10 using electrodeposition dynamic pump instead of the pinch valve 42.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an electrolyzed water generating apparatus according to one embodiment of the present invention.

FIG. 2 is a flowchart corresponding to a program executed by a control circuit shown in FIG. 1;

FIG. 3 is a flowchart showing details of a control routine of FIG. 2;

FIG. 4 is a graph showing a change characteristic of a dilute salt water concentration C with respect to a corrected conductivity σ.

FIG. 5 is a diagram illustrating a control state of a water supply valve 23 and a pinch valve 42.

FIG. 6 is a flowchart showing a part of a program related to an electrolyzed water generating apparatus according to another embodiment of the present invention.

FIG. 7 is a graph showing a change characteristic of a dilute salt concentration C with respect to a dilute salt water temperature T and a corrected conductivity σ.

FIG. 8 is a schematic diagram of a conventional electrolyzed water generation device.

[Explanation of symbols]

10: concentrated salt water tank, 14: liquid level sensor, 15, 23 ...
Water supply valve, 24: raw water conductivity detection sensor, 20: dilute salt water tank, 21: liquid level sensor, 22: dilute salt water conductivity detection sensor, 30: electrolytic cell, 34, 35 ... electrode, 42: pinch valve, 43, 44: pump, 51: DC power supply, 52
... voltage supply circuit, 60 ... control circuit, SW1 ... power switch, SW2 ... reference density setting switch.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-246265 (JP, A) JP-A-7-132291 (JP, A) JP-A 8-11616 (JP, A) JP-A-7-132 323289 (JP, A) Japanese Utility Model Application Hei 6-57496 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/46

Claims (4)

(57) [Claims] (1) removing concentrated salt water supplied from a concentrated salt water supply means;
Raw water such as tap water and well water supplied from
A dilute salt water tank for storing the diluted and adjusted dilute salt water , and electrolyzing the dilute salt water supplied from the dilute salt water tank by electrolysis.
An electrolytic cell that generates water and stored in the dilute salt water tank
A water level detecting means for detecting a water level of the dilute salt water;
Controlling the supply amount of the raw water based on the value of the detection signal of the stage
The level of the dilute salt water stored in the dilute salt water tank is adjusted to a predetermined level.
Water supply control means for maintaining the water content within the range,
Salt water conductivity detection to detect the conductivity of dilute salt water stored in the sea
Means based on the value of the detection signal of the diluted salt water conductivity detection means.
The concentrated salt water supply means is controlled to store in the diluted salt water tank.
A concentrated salt water supply control means for maintaining the concentration of the dilute salt water to be kept within a predetermined range, wherein the raw water conductivity detection means for detecting the conductivity of the raw water supplied from the external water supply source; by providing a correction means for correcting the value of the detection signal of the raw water conductivity detecting means of the detection signal of the rare brine conductivity detecting means based on the value, the physical chemistry of electrolytic water produced by the electrolytic cell Characteristic is one
An electrolyzed water generator characterized by being kept constant . 2. The dilute salt water conductivity detecting means according to claim 2,
The raw water conductivity is determined from the conductivity of the dilute salt water detected by
The conductivity of the raw water detected by the detection means is subtracted and compensated.
Positive conductivity is determined, and the concentrated salt water supply control means controls the correction
Dilute salt concentration corresponding to the corrected conductivity determined by the step
Is within the tolerance of the predetermined reference density?
And the concentration of the dilute salt water stored in the dilute salt water tank.
So that the concentrated salt water supply means is maintained within a predetermined range.
The electrolyzed water generation apparatus according to claim 1, wherein the apparatus is controlled. 3. The dilute salt water stored in the dilute salt water tank.
Temperature detecting means for detecting a temperature;
Controlling means for correcting the conductivity obtained by the correcting means;
Temperature of the base of the dilute brine that has been detected by said temperature detecting means
The diluted salt water concentration calculated based on the
It is determined whether or not the difference is within the range and the diluted salt water tank
The concentration of the stored salt water is maintained within a predetermined range.
3. The method according to claim 2, wherein the concentrated salt water supply means is controlled.
The electrolyzed water generating apparatus according to the above. 4. The dilute salt water conductivity detecting means according to claim 1, wherein
The raw water conductivity is determined from the conductivity of the dilute salt water detected by
The conductivity of the raw water detected by the detection means is subtracted and compensated.
Positive conductivity is determined, and the concentrated salt water supply control means controls the correction
The corrected conductivity obtained by the step is the reference concentration determined in advance.
Is within the tolerance of the conductivity corresponding to
The concentration of the dilute salt water stored in the dilute salt water tank
Controlling the concentrated salt water supply means so that it is maintained within a fixed range
The electrolyzed water generator according to claim 1, wherein