JP2002248471A - Electrolyzed water making apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolyzed water making apparatus operated with a proper applied current value corresponding to an integrated current so as to bring the dissolved hydrogen concentration of electrolyzed water close to a target dissolved hydrogen concentration. SOLUTION: The electrolyzed water making apparatus is equipped with an electrolytic cell 10 receiving the supply of raw water, the electrodes 14 and 15 provided in the electrolytic cell 10 and a power supply 30 for applying voltage across the electrodes 14 and 15. Preformed characteristics for showing the relation of the test applied current value applied across the electrodes 14 and 15, the integrated value obtained by integrating the same and the dissolved hydrogen concentration at the point of time of integration are stored. The electrolyzed water making apparatus calculates the integrated current value of the current values each of which is detected at each time when the current value is detected from the start point of time of electrolysis and operates the applied current value on the basis of the integrated current value at the point of time of calculation, the preset target dissolved hydrogen concentration and the stored characteristics to electrolyze raw water on the basis of the first applied current value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolyzed water generator for electrolyzing raw water supplied from an external water supply source in an electrolyzer to generate acidic water and alkaline water, and more particularly to an amount of dissolved hydrogen in alkaline water. To a device for measuring

[0002]

2. Description of the Related Art Conventionally, this type of electrolyzed water generating apparatus has
It is known that raw water supplied from an external water supply source is electrolyzed by applying a voltage between a pair of electrodes accommodated in an electrolytic cell to generate acidic water and alkaline water.

[0003] As such an electrolyzed water generating apparatus, for example, as disclosed in Japanese Patent Application Laid-Open No. H11-64274, the pH of the generated electrolyzed water is calculated and the electrolyzed water is adjusted so that the calculated pH becomes a predetermined value. Some devices adjust the voltage value, the electrolytic current value, or the supply amount of raw water to generate electrolytic water having a desired pH. However, when alkaline water is used, it may be more desirable to use alkaline water generated by paying attention to physical properties (characteristic values) other than pH, for example, the amount of dissolved hydrogen exhibiting the reducing property of alkaline water. There is a demand for an electrolyzed water generator that generates alkaline water having a desired dissolved hydrogen amount.

In order to realize this, a commercially available dissolved hydrogen meter is provided internally or externally, and the dissolved hydrogen amount from the dissolved hydrogen meter is input, and the input dissolved hydrogen amount becomes a predetermined value. There has been proposed an electrolyzed water generation apparatus that adjusts an electrolysis voltage value, an electrolysis current value, or a raw water supply amount so as to generate alkaline water having a desired dissolved hydrogen amount.

[0005]

However, in such an electrolyzed water generator provided with such a commercially available dissolved hydrogen meter, there is a problem that the electrolyzed water generator is expensive because the dissolved hydrogen meter is expensive. .

Accordingly, an object of the present invention is to detect a characteristic value that is correlated with the amount of dissolved hydrogen in the generated alkaline water and calculate the amount of the dissolved hydrogen in accordance with the detected value to obtain a desired amount of dissolved hydrogen. It is an object of the present invention to provide an inexpensive electrolyzed water generating apparatus capable of generating water.

[0007]

In order to achieve the above-mentioned object, a structural feature of the present invention is to apply a voltage between a pair of electrodes containing raw water supplied from an external water supply source therein. In an electrolyzed water generating apparatus provided with an electrolyzer for generating acidic water and alkaline water by electrolysis, detection means for detecting the oxidation-reduction potential of alkaline water generated in the electrolyzer, and measurement and determination in advance Storage means for storing in advance an arithmetic expression or a table representing a correlation between the oxidation-reduction potential and the amount of dissolved hydrogen, and a generator in the electrolytic cell based on the arithmetic expression or the table according to the oxidation-reduction potential detected by the detection means. Calculation means for calculating the amount of dissolved hydrogen in the alkaline water to be supplied, and control means for adjusting the voltage applied between the electrodes so that the amount of dissolved hydrogen calculated by the calculation means becomes a predetermined value. . (Claim 1) Another structural feature of the present invention is that raw water supplied from an external water supply source is electrolyzed by applying a voltage between a pair of electrodes housed therein, so that acidic water and alkaline water are obtained. Detecting means for detecting the surface tension of alkaline water generated in the electrolytic cell, and the correlation between the surface tension and the amount of dissolved hydrogen determined in advance in the electrolytic water generating apparatus having the electrolytic cell for producing Storage means for storing in advance an arithmetic expression or a table representing the formula, and arithmetic means for calculating the amount of dissolved hydrogen in the alkaline water generated in the electrolytic cell based on the arithmetic expression or the table in accordance with the surface tension detected by the detecting means And control means for adjusting the voltage applied between the electrodes so that the amount of dissolved hydrogen calculated by the calculation means becomes a predetermined value. (Claim 4) The control means of the present invention may be replaced with a control means for adjusting a current applied between the electrodes so that the amount of dissolved hydrogen calculated by the calculation means becomes a predetermined value. Item 5), may be replaced with control means for adjusting the flow rate of raw water supplied to the electrolytic cell so that the amount of dissolved hydrogen calculated by the calculation means becomes a predetermined value. (Claim 3 and Claim 6) In the present invention, a display means for displaying the amount of dissolved hydrogen calculated by the calculation means on a display may be further provided. (Claim 7)

[0008]

According to the present invention, the oxidation-reduction potential (or surface tension) of the generated alkaline water is detected, and the oxidation-reduction potential (or surface tension) and the amount of dissolved hydrogen are determined according to the detected value. Calculate the amount of dissolved hydrogen in the alkaline water based on the previously stored equation or table that represents the correlation with
The voltage, current or flow rate of the raw water supplied to the electrolytic cell is adjusted between the electrodes contained in the electrolytic cell so that the calculated dissolved hydrogen amount becomes a predetermined value. Some alkaline water is produced. Therefore, it is not necessary to use a conventional expensive dissolved hydrogen meter, and it is possible to provide an inexpensive electrolyzed water generation device that accurately generates a desired amount of dissolved hydrogen.

[0009]

DETAILED DESCRIPTION OF THE INVENTION a. First Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 schematically shows an electrolyzed water generating apparatus.

This electrolyzed water generating apparatus includes an electrolyzer 10. The inside of the electrolytic cell 10 is partitioned into a pair of electrode chambers 12 and 13 by a diaphragm 11, and the two electrode chambers 12 and 13 are each supplied with an external water supply (for example, tap water) via a water supply pipe 20.
It is connected to the. The water supply pipe 20 is provided with a pressure reducing valve 21 and a water valve 22 serving as an on-off valve in order from the upstream (the one closer to the external water supply source). The pressure reducing valve 21 is for reducing the pressure of raw water (tap water) from an external water supply source, and the water valve 22 is controlled to be opened and closed (on / off) by a control circuit 60. Thus, when the water valve 22 is opened, the decompressed raw water is supplied to the electrolytic cell 10 (the two electrode chambers 12 and 13) via the water supply pipe 20.

Each of the electrode chambers 12, 13 has a pair of electrodes 14,
15 are housed so as to face each other.
A DC voltage from a power supply 40, which is a constant voltage power supply, is applied between the electrodes 4 and 15, and in each of the electrode chambers 12 and 13, the supplied raw water is electrolyzed as described above to generate electrolyzed water.
In the electrode chamber 12 containing the electrode (anode) 14, acidic electrolyzed water (hereinafter, referred to as acidic water) is generated, and in the electrode chamber 13 containing the electrode (cathode) 15, alkaline electrolyzed water (hereinafter, referred to as alkaline water) is generated. . The power supply 40 is connected to the electrodes 14, 15
The direction in which the voltage is applied to (the direction of the current flowing between the electrodes 14 and 15) can be switched.
The application direction, voltage value, and the like are controlled by the control circuit 60. Further, a constant current power supply may be employed as the power supply 40.

One of a pair of conducting wires connecting the power source 40 and the pair of electrodes 14 and 15 respectively has the two electrodes 14 and 14 connected thereto.
There is provided a current sensor 70 that detects a current flowing between 15 and outputs the detected current value to the control circuit 60.

Outlet tubes 16 and 17 are connected to the electrode chambers 12 and 13 of the electrolytic cell 10, respectively. Each electrode chamber 1
The alkaline water and the acidic water respectively generated in 2 and 13 are discharged to the outside from outlet pipes 16 and 17, respectively.

The outlet pipe 16 is provided with a detection sensor 80 for detecting the oxidation-reduction potential of the liquid. This sensor 80 has a working electrode made of platinum and silver (Ag) -silver chloride (A
gCl) is provided, and a potential difference between both electrodes immersed in an alkaline water as an object to be measured is detected as an oxidation-reduction potential. The detection sensor 80 is a control circuit 6
0, and outputs the detected oxidation-reduction potential to the control circuit 60.

A display 90 is connected to the control circuit 60. The display 90 displays the physical properties (for example, the amount of dissolved hydrogen) of the electrolytic water detected by the detection sensor 80.
At this time, the indicator 90 may display the numerical values of the physical properties of the electrolyzed water, or may display the magnitude of the physical properties of the electrolyzed water in a plurality of stages.

The control circuit 60 is connected to an operation section 45 including a display lamp group 43 and a switch group 41.
Note that the operation section 45 may be configured separately or integrally with the apparatus main body. The display lamp group 43 is turned on in response to a display control signal from the control circuit 60, and has a lamp or the like indicating that generated water is being generated. The switch group 41 includes a pouring / stop switch 41a and a dissolved hydrogen amount setting switch 41b.
“a” sends to the control circuit 60 an operation signal including a start signal and an end signal for instructing each section in the apparatus main body to start and end the operation of electrolytic water generation. Note that the pouring / stop switch 41a is configured to maintain the ON state when the user presses the switch once, and to maintain the OFF state when the user presses the switch again. The dissolved hydrogen amount setting switch 41b is for setting the dissolved hydrogen amount of the generated alkaline water to a desired value. In this specification, the amount of dissolved hydrogen refers to the concentration of hydrogen dissolved in electrolyzed water.

The electrolyzed water generator includes the control circuit 60 connected to the water valve 22, the power supply 40, the display lamp group 43, the switch group 41, the current sensor 70 and the display 90 as described above. The control circuit 60 includes a microcomputer and a storage device, and controls opening and closing of the water valve 22 and operation of the power supply 40, the display lamp group 43, and the display 90.

A curve (arithmetic expression) as shown in FIG. 2 is stored in a storage device in the control circuit 60 in advance. This curve shows the correlation between the oxidation-reduction potential and the amount of dissolved hydrogen, and was created as follows. A distilled water producing apparatus for producing distilled water, an oxidation-reduction potential measuring apparatus for measuring an oxidation-reduction potential, and a dissolved hydrogen meter for measuring a dissolved hydrogen amount are prepared.

Tap water is distilled by a distilled water producing device to produce distilled water. This distilled water contains sodium chloride (NaC
l) is added at a rate of 100 mg / L to produce an aqueous solution. This ratio corresponds to the ratio of general electrolyte contained in tap water. Hydrogen gas is blown into this aqueous solution to generate a solution in which hydrogen is dissolved. At this time, the dissolved hydrogen amount was changed to a desired value by adjusting the amount of hydrogen gas blown while measuring the dissolved hydrogen amount of the solution with a dissolved hydrogen meter, and the amount of dissolved hydrogen in each measurable range was changed. The oxidation-reduction potential of this solution is measured by an oxidation-reduction potential measuring device. Based on these measured values, a curve showing the correlation between the oxidation-reduction potential and the amount of dissolved hydrogen is created, or an arithmetic expression is calculated. Then, this curve (arithmetic expression) is applied to the control circuit 60.
Is stored in the storage device. The oxidation-reduction potential at each dissolved hydrogen amount in the entire measurable range may be stored in the storage device of the control circuit 60 as a table.

A curve showing the correlation between the oxidation-reduction potential and the amount of dissolved hydrogen may be created as follows. An electrolyzed water generator having the same configuration as described above, an oxidation-reduction potential measuring device for measuring an oxidation-reduction potential, and a dissolved hydrogen meter for measuring a dissolved hydrogen amount are prepared. Note that the electrolyzed water generation device is a detection sensor 8
0 may not be mounted.

The apparatus for producing electrolyzed water supplies raw water to an electrolyzer and applies a voltage between a pair of electrodes housed in the electrolyzer to perform electrolysis of the electrolyzed water to perform a test electrolysis, thereby obtaining an acidic water and an electrolyzed water. Generates alkaline water. At this time,
The oxidation-reduction potential and the amount of dissolved hydrogen of the generated alkaline water are measured by a redox potential measurement device and a dissolved hydrogen meter, respectively. Then, based on the measured amount of dissolved hydrogen, the dissolved hydrogen amount generated by adjusting the voltage, current or flow rate of the raw water supplied to the electrolytic cell applied between the electrodes accommodated in the electrolytic cell is desired. And the oxidation-reduction potential of the generated alkaline water at each dissolved hydrogen amount in the entire measurable range is measured. A curve indicating the correlation between the oxidation-reduction potential of the alkaline water generated based on these measured values and the amount of dissolved hydrogen is created, or an arithmetic expression is calculated.
This curve (arithmetic expression) is stored in the storage device of the control circuit 60. The oxidation-reduction potential at each dissolved hydrogen amount in the entire measurable range may be stored in the storage device of the control circuit 60 as a table.

This curve is preferably created for each area where the electrolyzed water generator is used, so that errors in the amount of dissolved hydrogen in alkaline water generated by electrolyzing raw water in that area can be eliminated. .

Next, the generation of electrolyzed water by the electrolyzed water generation apparatus configured as described above will be described. Control circuit 60
Microcomputer executes the routine of FIG. 3 at predetermined time intervals. Specifically, the control circuit 60 starts generating the electrolyzed water when the pouring / stop switch 41a is pressed and turned on after the power switch (not shown) is turned on (steps 110 and 120). That is, the control circuit 60 opens the water valve 22 to start supplying raw water to the electrolytic cell 10, turns on the power supply 40, and starts applying a voltage between the pair of electrodes 14 and 15 in the electrolytic cell 10. Next, the control circuit 60 presses the ejection / stop switch 41a to
The generation of the electrolyzed water is continued until the state becomes the FF state (steps 100 to 170).

During the generation of the electrolyzed water, the control circuit 60
Inputs the oxidation-reduction potential detected by the detection sensor 80 every predetermined time (step 130), and calculates the input oxidation-reduction potential and the dissolved hydrogen amount at the time of input based on the curve already stored in the storage device. Calculate (Step 14
0). Then, the control circuit 60 displays on the display 90 whether the calculated amount of dissolved hydrogen is in a numerical value or in which stage (degree) it is divided into a plurality of stages (step 15).
0).

The control circuit 60 performs feedback control of the electrolytic current value detected by the current sensor 70 so that the dissolved hydrogen amount at the time of calculation becomes a desired dissolved hydrogen amount set in advance by the dissolved hydrogen amount setting switch 41b. Adjustment (step 160). That is, if the calculated dissolved hydrogen amount is smaller than the predetermined value, the dissolved hydrogen amount is increased by increasing the electrolytic current value, and if the calculated dissolved hydrogen amount is larger than the predetermined value, the dissolved hydrogen amount is decreased by decreasing the electrolytic current value. The amount of hydrogen has been reduced. Further, the control circuit 60 may adjust the electrolytic voltage value detected by the power supply 40 by performing feedback control. That is, if the calculated dissolved hydrogen amount is smaller than a predetermined value, the dissolved hydrogen amount is increased by increasing the electrolytic voltage value, and if the calculated dissolved hydrogen amount is larger than the predetermined value, the dissolved hydrogen amount is decreased by decreasing the electrolytic voltage value. The amount of hydrogen has been reduced. Further, the control circuit 60 may adjust the flow rate of the raw water detected by a flow rate sensor (not shown) provided in the water supply pipe 20 to detect the flow rate of the raw water by feedback control. That is, if the calculated dissolved hydrogen amount is smaller than a predetermined value, the dissolved hydrogen amount is increased by reducing the flow rate of the raw water, and if the calculated dissolved hydrogen amount is larger than the predetermined value, the dissolved hydrogen amount is increased by increasing the flow rate of the raw water. The amount of hydrogen has been reduced.

When the pouring / stop switch 41a is pressed during the generation of the electrolyzed water, the control circuit 60 stops the generation of the electrolyzed water (steps 110 and 180). That is,
The supply of raw water to the electrolytic cell 10 is stopped by closing the water valve 22, the power supply 40 is turned off, and the application of voltage between the pair of electrodes 14 and 15 in the electrolytic cell 10 is stopped. This stops the electrolysis of the raw water and stops the generation of the electrolyzed water.

As described above, in the first embodiment, the oxidation-reduction potential of the generated alkaline water is detected by the relatively inexpensive detection sensor 80, and the detected oxidation-reduction potential is already stored. The dissolved hydrogen amount is calculated based on the curve (arithmetic expression) (step 140), and the electrolysis applied between the electrodes 14 and 15 accommodated in the electrolytic cell 10 is adjusted so that the calculated dissolved hydrogen amount becomes a predetermined value. Since the current value, the electrolytic voltage value, or the flow rate of the raw water supplied to the electrolytic cell 10 is adjusted (step 160), alkaline water having a desired dissolved hydrogen amount is generated. Therefore, it is not necessary to use a conventional expensive dissolved hydrogen meter, and it is possible to provide an inexpensive electrolyzed water generation device that accurately generates a desired amount of dissolved hydrogen.

B. Second Embodiment Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 schematically shows an electrolyzed water generating apparatus.
The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

In this electrolyzed water generating apparatus, a detection sensor 180 for detecting the surface tension of the generated alkaline water is replaced with a detection sensor 180 for detecting the oxidation-reduction potential of the alkaline water provided in the apparatus according to the first embodiment. It is provided. The detection sensor 180 is connected to the outlet pipe 16 via the outlet pipe 181. The discharge pipe 181 is provided with a solenoid valve 182. When the solenoid valve 182 is opened, the alkaline water in the discharge pipe 16 is sent to the detection sensor 180 via the discharge pipe 181. The detection sensor 180 detects the surface tension of the liquid. For example, an image of an alkaline water droplet that is naturally dropped from the tip of the discharge pipe 181 is taken, and the volume or weight of the droplet is calculated based on the image. Then, the surface tension is calculated and detected based on the calculated value. The detection sensor 180 is connected to the control circuit 60 and outputs the detected surface tension to the control circuit 60. An electromagnetic valve 182 is also connected to the control circuit 60, and the control circuit 60
2 is controlled to open and close.

A curve (arithmetic expression) as shown in FIG. 5 is stored in the storage device in the control circuit 60 in advance. This curve shows the correlation between the surface tension and the amount of dissolved hydrogen, and was created as follows. An electrolyzed water generator, a distilled water producing apparatus for producing distilled water, a surface tensiometer for measuring surface tension, and a dissolved hydrogen meter for measuring the amount of dissolved hydrogen are prepared. Note that the electrolyzed water generation device may not include the detection sensor 180.

Raw water (tap water) is distilled by a distilled water producing apparatus to produce distilled water. Sodium chloride (NaCl) is added to the distilled water at a rate of 100 mg / L to produce an aqueous solution. This ratio corresponds to the ratio of general electrolyte contained in tap water. This aqueous solution is supplied to the electrolyzed water generator. The electrolyzed water generator supplies the supplied aqueous solution to the electrolytic cell, applies a voltage between a pair of electrodes housed in the electrolytic cell, and performs an electrolysis of the aqueous solution to perform a test electrolysis. Producing water. At this time, the surface tension and the amount of dissolved hydrogen of the generated alkaline water are measured by a surface tensiometer and a dissolved hydrogen meter, respectively. Then, based on the measured dissolved hydrogen amount, the dissolved hydrogen amount generated by adjusting the voltage, current or flow rate of the aqueous solution supplied to the electrolytic bath applied between the electrodes contained in the electrolytic bath is desired. And the surface tension of the generated alkaline water at each dissolved hydrogen amount in the entire measurable range is measured. A curve showing the correlation between the amount of dissolved hydrogen in the alkaline water generated based on these measured values and the surface tension is created, or an arithmetic expression is calculated. This curve (arithmetic expression) is stored in the storage device of the control circuit 60. The surface tension at each dissolved hydrogen amount in the entire measurable range may be stored in the storage device of the control circuit 60 as a table.

Also, a curve showing the correlation between the surface tension and the amount of dissolved hydrogen may be created by electrolyzing raw water as it is, instead of electrolyzing raw water distilled as described above. Good. At this time, it is preferable that the curve is created for each area where the electrolyzed water generation device is used, whereby errors in the amount of dissolved hydrogen in alkaline water generated by electrolyzing raw water in the area can be eliminated.

Next, the generation of electrolyzed water by the electrolyzed water generation apparatus configured as described above will be described. In the electrolyzed water generation device according to the second embodiment, the microcomputer of the control circuit 60 executes the routine of FIG. 3 every predetermined time as in the first embodiment.

However, step 130 and step 1
The processing of steps 210 and 220 is executed instead of 40 to calculate the amount of dissolved hydrogen. Specifically, during the generation of the electrolyzed water, the control circuit 60 inputs the surface tension detected by the detection sensor 180 every predetermined time, and based on the input surface tension and the curve already stored in the storage device. The amount of dissolved hydrogen at the time of input is calculated. In step 160, the control circuit 60 sets the dissolved hydrogen amount at the time of calculation to the dissolved hydrogen amount setting switch 41.
b so that the desired dissolved hydrogen amount set in advance by b
As in the first embodiment, the electrolytic current value, the electrolytic voltage value, or the supply amount of raw water is adjusted by feedback control.

As described above, also in the second embodiment, the surface tension of the generated alkaline water is detected by the relatively inexpensive detection sensor 180, and the detected surface tension and the already stored curve ( The dissolved hydrogen amount is calculated based on the calculation formula (Step 220), and the electrolytic current value applied between the electrodes 14 and 15 accommodated in the electrolytic cell 10 so that the calculated dissolved hydrogen amount becomes a predetermined value. Since the electrolysis voltage value or the flow rate of the raw water supplied to the electrolysis tank 10 is adjusted (step 160), alkaline water having a desired dissolved hydrogen amount is generated. Therefore, it is not necessary to use a conventional expensive dissolved hydrogen meter, and it is possible to provide an inexpensive electrolyzed water generation device that accurately generates a desired amount of dissolved hydrogen.

Although the present invention has been applied to the diaphragm type as in each of the above embodiments, it can also be applied to a non-diaphragm type.

The present invention can also be applied to a device provided with an electrolysis accelerator supply means for adding an aqueous solution of an inorganic salt as an electrolysis accelerator for accelerating electrolysis.

In addition, the present invention applies a voltage to the electrodes 14 and 15 in opposite directions at predetermined time intervals, or removes the scale attached to the electrodes 14 and 15 in order to uniformly consume the electrodes 14 and 15. The present invention can also be applied to a case where a voltage is applied to the electrodes 14 and 15 in the opposite direction to that for removing them. In this case, both outlet pipes 16,
17, a detection sensor 80 (or a detection sensor 180) may be attached to each of them, a detection sensor of a lead pipe from which the alkaline water is led may be selected, and the detected hydrogen value may be used to calculate the amount of dissolved hydrogen. In addition, the detection sensor 80 (or the detection sensor 180) may be attached only to the outlet pipe 16, and a switching mechanism for leading the alkaline water only to the outlet pipe 16 may be provided. This switching mechanism is provided between the electrode chambers 12 and 13 and the detection sensor, and communicates with the electrode chambers 12 and 13 to the outlet pipes 16 and 17 in a switchable manner in accordance with the direction of the voltage applied to the electrodes 14 and 15. Thus, only the alkaline water is led out from the outlet pipe 16.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram schematically showing an electrolyzed water generation device according to a first embodiment of the present invention.

FIG. 2 is a curve (characteristic) showing a correlation between an oxidation-reduction potential and an amount of dissolved hydrogen stored in a storage device of a control circuit shown in FIG.

FIG. 3 is a flowchart executed by a control circuit (microcomputer) shown in FIG. 1;

FIG. 4 is an overall configuration diagram schematically showing an electrolyzed water generation device according to a second embodiment of the present invention.

5 is a curve (characteristic) showing a correlation between a surface tension and an amount of dissolved hydrogen stored in a storage device of the control circuit shown in FIG.

FIG. 6 is a part of a flowchart executed by the control circuit (microcomputer) shown in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electrolyzer, 14, 15 ... Electrode, 16, 17 ... Lead-out tube, 40 ... Power supply, 60 ... Control circuit, 70 ... Current sensor,
80, 180 ... detection sensor, 90 ... display.

Claims (7)

[Claims] 1. An electrolytic water generating apparatus comprising an electrolytic cell for generating an acidic water and an alkaline water by electrolyzing raw water supplied from an external water supply source by applying a voltage between a pair of electrodes accommodated therein. In the apparatus, a detecting means for detecting an oxidation-reduction potential of the alkaline water generated in the electrolytic cell, and an arithmetic expression or a table representing a correlation between the oxidation-reduction potential and the amount of dissolved hydrogen obtained by measuring in advance. A storage unit that stores in advance; and a calculation unit that calculates the amount of dissolved hydrogen in the alkaline water generated in the electrolytic cell based on the calculation formula or the table according to the oxidation-reduction potential detected by the detection unit. An electrolyzed water generating apparatus comprising: a control unit that adjusts a voltage applied between the electrodes so that the amount of dissolved hydrogen calculated by the calculation unit becomes a predetermined value. 2. The method according to claim 1, wherein said control means is replaced with control means for adjusting a current applied between said electrodes so that the amount of dissolved hydrogen calculated by said calculation means becomes a predetermined value. Characterized electrolytic water generator. 3. The control means according to claim 1, wherein said control means adjusts the flow rate of raw water supplied to said electrolytic cell so that the amount of dissolved hydrogen calculated by said calculation means becomes a predetermined value. An electrolyzed water generation device characterized by the above-mentioned. 4. An electrolyzed water generator comprising an electrolytic cell for electrolyzing raw water supplied from an external water supply source by applying a voltage between a pair of electrodes housed therein to generate acidic water and alkaline water. In the apparatus, a detecting means for detecting the surface tension of the alkaline water generated in the electrolytic cell, and an arithmetic expression or a table representing a correlation between the surface tension and the dissolved hydrogen amount obtained by measuring in advance are stored in advance. Storage means for calculating, based on the surface tension detected by the detection means, a calculation means for calculating the amount of dissolved hydrogen in the alkaline water generated in the electrolytic cell based on the calculation formula or table; An electrolyzed water generation apparatus comprising: a control unit that adjusts a voltage applied between the electrodes so that the calculated amount of dissolved hydrogen becomes a predetermined value. 5. The control means according to claim 4, wherein said control means adjusts a current applied between said electrodes so that the amount of dissolved hydrogen calculated by said calculation means becomes a predetermined value. Characterized electrolytic water generator. 6. The control means according to claim 4, wherein said control means adjusts the flow rate of raw water supplied to said electrolytic cell so that the amount of dissolved hydrogen calculated by said calculation means becomes a predetermined value. An electrolyzed water generation device characterized by the above-mentioned. 7. An electrolyzed water generating apparatus according to claim 1, further comprising a display means for displaying on the display a dissolved hydrogen amount calculated by said calculating means. .