JP3392130B2 - Electrolyzed water generator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the electrolysis of tap water and the like.
Continuous generation of alkaline ionized water and acidic ionized water
The present invention relates to an electrolyzed water generator. 2. Description of the Related Art Conventionally, electrolytic water generation as shown in FIG.
An apparatus is provided. This is a filter medium 31 made of activated carbon.
Water purifier 3 provided with a filter medium 32 formed of a hollow fiber membrane
And the electrolytic cell 2, and two kinds of
Disposed with electrodes 21 and 22 separated by electrolytic membrane 20
Have been. A switching unit attached to a tap water faucet 99
The water sent from the knit 98 to the water purifier 3 is inside the water purifier 3
DC voltage is applied to the electrodes 21 and 22
Is sent to the electrolytic cell 2 which has been
And alkaline ionized water on the electrode side that is the cathode,
Acidic ion water is generated on the electrode side serving as the anode.
Of these two types of ionized water, the main use water (generally used for drinking)
Is discharged from the discharge port 23.
The secondary use water (acid ion water) is discharged from the discharge port 24 to the drain port.
Sent to 64. The voltage applied to the electrodes 21 and 22 of the electrolytic cell 2 is
The start of application is established by connecting between the switching unit 98 and the water purifier 3.
Pressure sensing with a diaphragm 68 installed in a water channel
Switch PS. In addition, water purifier 3 and electricity
The water channel connecting with the tank 2 is also connected to the drain port 64.
But the ball valve 66 is closed by water pressure
Then, the water flowing toward the electrolytic cell 2 flows directly to the drain port 64.
I can't wait. [0005] The water supply from the switching unit 98 is stopped.
If the pressure detection switch PS is turned off, the electrolytic cell 2
While the power to the electrodes 21 and 22 is cut off,
The water in tank 2 is open because there is no water pressure difference
The water is discharged to a drain port 64 through a ball valve 66. Ma
In the electrolytic cell 2, the electrode 2
The scale will be deposited on the surface of 1,22,
Does this scale reduce the electrolytic capacity?
When the water supply was stopped, the electrodes 21 and
Instead of immediately stopping the voltage application to 22,
For about 30 seconds, a voltage of the opposite polarity is applied to the electrode 2.
By performing the reverse polarity electrolysis applied to 1, 22
Has also been eluted. SUMMARY OF THE INVENTION
Electrolyzed aquatic water used for conventional home use
Check the pH value of the electrolyzed water that is actually discharged.
For this purpose, simple analysis using reagents, etc., must be performed separately.
I didn't. In addition, in order to obtain electrolyzed water with the desired pH value,
If you need to adjust the set voltage and flow rate manually
In addition, including the time required to confirm the pH value,
Electrolyzed water of H value could not be obtained reliably. For this purpose, a pH sensor is used to
The pH value is detected, and the electrolytic voltage is controlled according to the detected value.
Japanese Patent Laid-Open No. 5-64785, etc.
In this case, electrolyzed water at the desired pH value is
But still have the following problems:
You. That is, depending on the quality of the raw water for electrolysis,
Is sufficient alkaline electrolyzed water (pH
10 or more) or strongly acidic ionic water (pH 3-2)
Or not. For example, relatively high carbonic acid content
Sufficient pH value, such as when using groundwater that contains water as raw water
Is not observed. The present invention has been made in view of the above points.
The main purpose is to determine the desired pH value.
Electrolyzed water can be obtained and the influence of the quality of raw water
An object of the present invention is to provide an electrolyzed water generation device that can suppress the generation. [0010] Accordingly, the present invention relates to an electrolysis device.
To produce alkaline ionized water and acidic ionized water
Equipped with an electrolytic tank that discharges electrolytic water separately
PH sensor that continuously measures the pH value of electrolyzed water
And the pH value and target pH value obtained from this pH sensor
And the feedback of the electrolytic voltage applied to the electrolytic cell.
And a control circuit for controlling the
The circuit is equipped with an electrolyzer for obtaining electrolyzed water of the target pH value.
The pH value of the electrolyzed water obtained when pressure is applied reaches the target pH value.
If the target pH value is not reached and the electrolysis voltage is controlled,
It has the characteristic that it is. According to the present invention, the electrolytic water actually discharged
The electrolysis voltage is adjusted so that the pH value of
Electrolysis of the required pH value to be controlled
Water can be obtained, and the target p
Obtained when an electrolysis voltage is applied to obtain electrolyzed water with an H value
PH value does not reach the target pH value within the required time
Sometimes the target pH value is raised to control the electrolysis voltage
Therefore, even if there is a problem with the raw water quality,
Electrolyzed water with a near pH value can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;
More specifically, this electrolyzed water generator is shown in FIG.
Thus, the electrolytic cell 2, the backwashing unit 4, the switching valves 5, 6
And flow control valve 65, pH sensor 7, calcium agent
The cylinder 80, the activated carbon cartridge 85, etc. are housed (see FIG.
(Not shown). The electrolytic cell 2 has two types of cells as in the conventional example.
Poles 21 and 22 and an electrolytic diaphragm 20 for partitioning the poles 21 and 22
With inlets 25 and 26 at the bottom and discharge at the top
Ports 23 and 24, and these discharge ports 23 and 24
Are connected to the discharge pipes 17 and 18 via the switching valve 6.
You. Here, the inflow port 25 and the discharge port 23
An inlet 26 and an outlet 24 communicate with a space surrounding the electrode 21.
Is connected to the space surrounding the other electrode 22
However, the inlet 25 is narrower than the inlet 26,
The flow rate flowing into the electrode 21 side is the flow rate flowing into the electrode 22 side.
The ratio of 1: 3 to 1: 4
I have. The switching valve 6 includes a discharge port 23 and a discharge pipe 17.
When the discharge port 24 and the discharge pipe 18 are connected,
When the discharge port 23 and the discharge pipe 18 communicate with each other, the discharge port
24 and an electromagnetic rotary valve that communicates with the discharge pipe 17.
Has been established. The water purifier 3 comprises a filter medium 31 made of activated carbon and a medium.
And a filter medium 32 made of a hollow fiber membrane.
One of the two openings provided is a backwash unit
The other end is connected to a switching valve 5. The above
The two filter media 31, 32 are contained in a single cartridge.
And is configured so that each cartridge can be replaced.
I have. The backwashing unit 4 includes a filter medium 3 in the water purifier 3.
By passing the clogging of 1,32 once through the water purifier 3
By performing backwashing, in which the filtered purified water flows back to the water purifier 3,
This is to eliminate the cylinder as shown in FIG.
40, a piston 41 disposed in the cylinder 40,
While slidably engaging with the stone 41,
The valve body 43 is pulled against the spring 45 as the
It consists of an interlocking pin 42 for lowering the cylinder 40
A port 46 connected to the water purifier 3 and a valve
It opens when the valve 43 descends and closes when the valve element 43 rises
A discharge port 44 is provided.
The space below the piston 41 is formed by the port of the switching valve 5 described below.
Port 55. It is attached below the backwash unit 4.
The switching valve 5 has ports 51 and 54 at both ends.
And three ports on the circumferential surface that are offset in the axial direction
52, 53, and 55, and a movable
Move with the pressure of the water that selectively flows in from ports 51 and 54
As a result, communication between the ports 51 and 52 shown in FIG.
In addition, the ports 55 and 53 form the outer peripheral space 57 of the movable body 56.
When the movable body 56 moves to the right in the drawing,
Between the ports 54 and 55 and the outer peripheral space.
The communication between the ports 52 and 53 through 57 is cut off.
Replace it. In addition, what is connected to the water purifier 3 is
Port 52 is connected to the drain pipe 19
I have. Also, ports 51 and 54 are provided in faucet 99.
It is connected to the switching unit 98 and switches to port 51
A flow control valve 65 is provided between the unit and the unit 98.
You. The discharge port 44 of the backwash unit 4
Is connected to the inlets 25 and 26 of the electrolytic cell 2 by a pipe 47.
The pipe 47 has a flow meter
66 is provided and the calcium agent is added.
A tube 80 is provided. In addition, calcium agent addition cylinder 8
0 and the inlets 25 and 26 are connected by a check valve 67
It is connected to the drain port 19 through. This check valve 67
Is closed when water pressure is applied to the pipe 47 side.
Open when the water pressure is no longer applied to the 47
The internal water and the water in the pipe 47 are discharged from the drain port 19. The discharge pipe 18 is connected to the discharge pipe 18 through an electromagnetic three-way valve 86.
And the activated carbon cartridge 85 is connected
PH sensor downstream of activated carbon cartridge 85
7 is connected. The pH sensor 7 is connected to the discharge pipe 1
Part or all of the water flowing through 8 was made to pass
Here, as shown in FIG.
A small amount of Cl reagent is added to the water passing through the water passage
Then, the pH value is measured based on the electrical conductivity of water at this time.
As shown in FIG. 7 (b),
It is configured to output a voltage of 0 to 5 V.
After the output voltage of the control circuit C is subjected to A / D conversion,
It is taken in. In addition, the pH value of
When measurement becomes impossible, the output voltage is 0V or
Is set to 5 V, so that the control circuit C
The presence or absence of the reagent of the sensor 7 can be determined.
When the control circuit C determines that the pressure
A display for prompting the replenishment of the reagent of the server 7 is provided.
You. The display section Lp in FIGS. 8 and 9 is a display for this purpose.
Department. The electrolyzed water generating apparatus thus formed is:
As described above, the two ports 5 in the switching valve 5
1, 54 are connected to the switching unit 98 via individual piping
Is done. This switching unit 98 is operated by lever operation.
Stop the water supply to the electrolyzed water generator and
Switching between water supply and water supply to port 54 side
Is made possible. Next, the flow of water when extracting the electrolyzed water will be described.
In the switching unit 98, water is switched by a switching valve.
5 to the port 51 side, the port in the switching valve 5
The water that has reached 51 is moved by the movable body 56 in the switching valve 5 by the water pressure.
To press the port 52, as shown in FIG.
It entered the water purifier 3 and was filtered by the filter media 30 and 31
Thereafter, the flow reaches the port 46 of the backwashing unit 4. And port
Water entering the cylinder 40 of the backwash unit 4 from 46
Presses down the piston 41 first with water pressure,
The discharge port 44 closed by the valve body 43 is opened,
Calcium agent addition cylinder 80 through discharge pipe 44 through pipe 47
Through the inlets 25 and 26 of the electrolytic cell 2
And is electrolyzed here. The power supply to the electrolytic cell 2 is
The flow rate obtained from the flow meter 66 disposed in the middle of the storage pipe 47
Started by the information. And an instruction to obtain alkaline ionized water.
Is performed, the electrode 21 of the electrolytic cell 2 becomes the anode,
Since an electrolytic voltage is applied so that the electrode 22 becomes a cathode,
Then, acidic ionized water is supplied to the discharge port 23 side, and
Lucari ionized water is obtained, and at this time, the switching valve 6 is shown in FIG.
And the alkaline ionized water is discharged
On the 18 side, the acidic ionized water is discharged to the discharge pipe 17 side. When an instruction to obtain acidic ionized water is given.
The next two waters depending on the indicated acidity
It becomes a flow. First, in the case of weakly acidic ionic water, the electrolytic cell 2
Electrode so that the electrode 21 becomes the cathode and the electrode 22 becomes the anode
Since the voltage is applied, the alkali ion
As a result, acidic ionized water is obtained on the discharge port 24 side.
At this time, the switching valve 6 is in the state shown in FIG.
Acid ionized water is discharged to the discharge pipe 17 side
It is discharged to the pipe 18 side. This weakly acidic ionic water is selected.
If it is selected, the electromagnetic three-way valve 86 is switched,
The weakly acidic ionized water passes through the activated carbon cartridge 85,
At this time, free residual chlorine and hypochlorous acid are removed. In the case of strongly acidic ionic water, the voltage of the electrolytic cell 2 is
Electrolysis voltage so that pole 21 is the anode and electrode 22 is the cathode
Is applied, acidic ion water is provided on the discharge port 23 side,
Alkaline ionized water is obtained at the discharge port 24 side.
The switching valve 6 is in a state different from the above two states as shown in FIG.
To be switched, the alkaline ionized water is discharged from the discharge pipe 17.
The acidic ion water is discharged to the discharge pipe 18 side. this
To discharge the strongly acidic ionic water from the discharge pipe 18 side
In this case, the electrode 21 side is used as an anode, as described above.
The inflow port 25 on the electrode 21 side is referred to as the inflow port 26 on the electrode 22 side.
Squeezed to reduce inflow, strongly acidic ions
This is because it is easy to obtain water. Then, in the switching unit 98, water is removed.
If it flows to the port 54 side of the switching valve 5, the movable body by water pressure
With the movement of 56, the switching valve 5 is switched, and from the port 54
The entered water is passed through the port 55 to the backwash unit 4.
Flows into the space below the piston 41,
The discharge port 44 is closed by the valve 43 and
Filtered purified water that has accumulated in the space above Stone 41
The water flows backward from the port 46 to the water purifier 3 side. This backwater
As shown in FIG. 5, the filter media 32 and 31 are backwashed to remove the filter media.
After washing off impurities adhering to 32, 31
It is discharged from the drain port 19 through the ports 52 and 53 of the valve 5.
You. At this time, the inflow of water from the switching unit 98
Moves the piston 41 in the backwash unit 4 to the top dead center.
It ends when it is moved. And at the time of such backwash
Or when water is stopped in the switching unit 98, the electrolytic cell
Check that the water in 2 is open because there is no pressure difference
The water is discharged from the drain 19 through the valve 67. FIG. 1 shows a block diagram of the electrolyzed water generating apparatus.
Circuit diagram, in which C is a one-chip microcomputer.
D is an operation display unit.
You. Control to which the pH sensor 7 and the flow meter 66 are connected
The circuit C includes an electrolytic cell applied to the electrodes 21 and 22 of the electrolytic cell 2.
So that the pressure can be controlled by PWM control
The target pH value and the pH sensor 7
PH value of electrolyzed water being discharged through discharge pipe 18 obtained
Comparison circuit C with ₁ Built-in pH value detected at target pH value
The feedback control of the electrolytic voltage
I will do it. FIG. 8 shows an example of the display operation section D. Operation unit
As the power switch SW ₁ Besides, pH switch
Switch _Two , Switch SW for indicating strong electrolysis _Three , Raw water
Switch SW for checking _Four Switch to acidic
Switch SW _Five To obtain alkaline ionized water for storage
Switch SW ₆ , A switch for fine adjustment of pH at this time
Switch ₇ In addition to the current time setting switch S
W ₈ Turn on / off the sound indicating that the electrolytic operation is in progress
Switch SW for ₉ , And integration in the control circuit C
Switch for resetting the accumulated use time of the water purifier 3
SW _Ten It has. As a display unit, the data obtained with the pH sensor 7 was used.
The display section La that displays the pH value to be displayed numerically, the flow meter 66
Display section Lb for displaying the obtained flow rate information,
Lc to display the time to be displayed, switch SW _Two , S
W _Three , SW _Five , SW ₆ A display unit Ld for displaying a selection state of
Display L indicating that electrodes 21 and 22 are being cleaned
e, display unit L for prompting replacement of filter media 31 and 32 of water purifier 3
f, Indicate whether the content of carbon dioxide in raw water is large
Display Lg, display for prompting the replenishment of the reagent of pH sensor 7
Equipped with a fluorescent display tube made of Lp
In addition to the above, a display section L for indicating a power supply state ₁ , Switch SW _Two , S
W _Three , SW _Four , SW ₆ Discharge of alkaline ionized water
Display section L that lights up when selected _Two , Switch SW _Five To
Therefore, which of the two types of acidic ionic water can be selected
Display section L that indicates whether the _Three , L _Four Emission display such as
It has a part. The cleaning of the electrodes 21 and 22 is performed by cleaning the electrodes 21 and 22.
22 to remove the scale generated on the
66, when water stoppage is detected, the electrodes 21 of the electrolytic cell 2
Applying a voltage of the opposite polarity to that for a short time to 22
Done by Cleaning water containing scale at this time
Is discharged from the inflow ports 25 and 26 through the drain port 19.
It is. The operation display unit D as described above is provided.
Power switch SW ₁ If you enter
Indicator L ₁ Lights up, and in this state the switch SW _Two If you press
Depending on the number of presses, the level of "purified water" or "1-4"
Can be selected and the selected state is displayed
Is displayed in the section Ld and passed through the switching unit 98.
Then, the selected action is performed. "Pure
When “Water” is selected, “Purification” in the display Ld
The “Water” part is illuminated and displayed, and the
Since no solution voltage is applied, the discharge pipe 18 is
Only water purified by the water dispenser 3 is discharged.
The flow rate and pH value of the water are displayed on the display sections La and Lb.
You. When any one of levels 1 to 4 is selected
Is the application of the electrolytic voltage together with the sensing of the water flow by the flow meter 66.
At this time, the control circuit C is selected.
To a preset target pH value according to the level
Electrolytic voltage is applied to the electrodes 21 and 22 and the pH
Electrolytic water discharged from the discharge pipe 18 obtained from the sensor 7
Performs feedback control of the electrolytic voltage according to the pH value.
U. That is, as the target pH value, for example,
H9.0, pH 9.5 for level 2 and pH 1 for level 3
0.0, pH 10.5 is set at level 4,
When level 2 is selected, it will be adjusted according to this pH value.
Apply the set electrolysis voltage to the electrodes 21 and 22
When the electrolysis operation is started,
PH value to be detected by receiving feedback of the pH value
The value is 9.5 ± 0.5 to 9.5 ± 0.5, which is the target pH value.
Thus, the electrolytic voltage is controlled. At this time,
The pH value is displayed numerically by the display unit La
The flow rate detected by the flow meter 66 is displayed on the display Lb.
Is displayed. Switch SW _Three Indicate strong electrolysis by
If, for example, strong electrolysis is indicated on the display Ld,
For example, 11 is set as the target pH value, and
Electrolyte so that the pH value detected by the
Pressure feedback control is performed. Switch SW
_Four Is a predetermined voltage of about 20 to 25 V when pressed.
Is applied to the electrodes 21 and 22 for a predetermined time,
PH of electrolyzed water at a certain time after the start of electrolysis
The value is detected by the pH sensor 7,
PH value does not reach a predetermined value of about 9.5 to 10.5
When 8.5 to 9.5 or less is indicated, the write
Water to the purified water through the water purifier 3
(CO ^Two ) To the user that
You. Water quality check for adaptability to raw water electrolysis
Is displayed, and this result is displayed.
Therefore, the user can know the water quality. Further, the control circuit C performs the above-mentioned water quality check.
In the result, the electrolysis obtained when applying a certain electrolysis voltage
When the pH value of water does not reach a predetermined value, the target pH value is
Replace it with a value about 0.5 higher than the initial setting.
After that, the feedback is performed using this target pH value.
Performs the lock control. The electrolysis voltage will be set higher.
This makes it easier to obtain electrolyzed water with the desired pH value.
It is. The discharge mode of ordinary alkaline ionized water
In the case of electrolysis, p
If the H value does not reach the target pH value,
It is designed to carry out
In response to the above indication, the flow control valve 65 is squeezed to flow into the electrolytic cell 2.
If the incoming flow rate is reduced, it will pass between the electrodes 21 and 22.
PH value that matches the target pH value
Of electrolyzed water can be obtained. Of course,
Reducing the flow rate as in
This is effective for obtaining alkaline ionized water. Switch SW ₆ When you press, the control circuit
For C, set a value of 10 to 10.5 as the target pH value
Start electrolysis. At this time, the feedback system of electrolytic voltage
The control is the same as in the case described above. like this
Switch the mode to SW _Two What is provided separately is the discharge
To provide the alkaline ionized water that is used for drinking on the spot
If you want to put it in a container like a plastic bottle
Considering that, alkaline ions with an electrolysis degree suitable for storage
It makes it easy to obtain water. In addition,
If the pH value is 9.5 or less, carbon dioxide in air or water
Although the alkalinity tends to decrease depending on the concentration, etc., the pH value is 1
Alkaline ion water of about 0 to 10.5 has carbon dioxide concentration
The pH value does not drop much without being affected by
It is suitable for storing once. Switch SW _Five If you press
Therefore, it can be used as astringent water
Display that indicates that weakly acidic ionic water has been selected
L _Three Indicates that the selection of strongly acidic ionic water has been made.
Display section L _Four And are alternately lit, and the selected
A target pH value according to the electrolytic strength is set. here
In the case of weakly acidic ionic water, set the target pH value to 5.8 and
In the case of ionic water, set the target pH value to 3 to 2,
Acidity of pH value within ± 0.3 of target pH value
The electrolytic voltage is adjusted so that the ionized water is discharged to the discharge pipe 18.
Perform feedback control. The flow path for weakly acidic ionic water is shown in FIG.
As shown in Fig. 4, the flow path for strongly acidic ionic water is shown in Fig. 4.
As shown above, it is as described above.
By switching between them, that is, strongly acidic ionic water
Reducing the flow rate to the obtained anode electrode 21 side
With the addition of sodium chloride
Water is easily available. Weakly acidic
When obtaining on-water, a weak acid from the electrolytic cell 2 to the discharge pipe 18
Ionic water is an activated carbon cartridge filled with fibrous activated carbon.
Free chlorine and hypochlorous acid are removed.
Suitable for use as astringent water
It will be. FIG. 9 shows another example of the display unit D. This is pH
A display unit that displays the pH value detected by the sensor 7
In addition to the display section La that displays the pH value with numbers,
According to the pH value of test materials such as mass test paper and aqua check solution
Display unit Lm for displaying a color matching the color
The value can be communicated to the user more effectively visually
This is shown in FIG. 9 (a).
Is the number of stages in which the degree of electrolysis can be set as the display section Lm.
(Level) in accordance with the display of the display section Ld
If the number of colors can be displayed according to the level setting
Also, in the case of alkaline ionized water, above the display Ld
In the case of acidic ionized water, it is displayed below the display section Ld.
This is shown in FIG. 9 (b).
Was divided into 11 stages from pH 2 to pH 12.
The display units Lm are arranged in a horizontal line as the number of colors.
You. By the way, the color coding used here is shown in FIG.
In the illustration, the upper side of the alkaline side is grease corresponding to purified water.
Light blue corresponding to level 1, level 2
Blue, dark blue corresponding to level 3, level 4
6 levels of light purple corresponding to strong electrolysis and lower level
The acid side of the green corresponds to clean water, level 1
Yellow-green, light yellow corresponding to level 2, corresponding to level 3
Dark yellow, light orange corresponding to level 4, strong electrolysis
The corresponding dark orange has six levels, as shown in FIG. 9 (b).
Is dark orange, light orange, dark yellow, light yellow in order from one end
Color, yellow green, green, light blue, blue, dark blue
ー, light purple, each purple color corresponding to the pH value 2-11
I have. As described above, in the present invention, the actual
Adjust the pH value of the discharged electrolytic water to the desired pH value.
Electrolysis is performed because the electrolysis voltage is feedback-controlled.
Without being affected by the quality of raw water, etc.
Electrolyzed water of H value can be obtained, and electrolyzed water of required pH value
Therefore, the effect of the above can be surely obtained. Only
Also, the electrolysis voltage for obtaining electrolyzed water of the target pH value
Target pH value of electrolyzed water obtained when added within required time
When the pH value is not reached, increase the target pH value to control the electrolytic voltage.
If it is something to control, there is a problem with the quality of the raw water
Even when the H value is not easily reached, it is closer to the target pH value.
Electrolyzed water with a high pH value can be obtained more quickly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block circuit diagram of one embodiment. FIG. 2 is a schematic view showing the same at the time of discharging alkaline ionized water. FIG. 3 is a schematic diagram showing the same when weakly acidic ionized water is discharged. FIG. 4 is a schematic view showing the same when strongly acidic ionized water is discharged. FIG. 5 is a schematic view showing the same during backwashing. FIG. 6 is a cross-sectional view of a backwash unit and a switching valve according to the third embodiment. FIGS. 7A and 7B show the same pH sensor as the above, wherein FIG. 7A is a schematic cross-sectional view and FIG. FIG. 8 is a front view showing an example of the operation display unit of the above. FIGS. 9A and 9B are front views each showing another example of the display unit. FIG. 10 is a schematic sectional view of a conventional example. [Explanation of symbols] C control circuit 2 electrolytic cell 7 pH sensor

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toru Watanabe 1048 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor Ryo Shimizu 1048 Kadoma Kadoma, Kadoma City, Osaka Matsushita Electric Works Co., Ltd. (72) Inventor Hiroyuki Noguchi 1048 Kadoma Kadoma, Kadoma City, Osaka Pref. (72) Inventor Juichi Nishikawa 1048 Kadoma Kadoma, Kadoma City, Osaka Pref. Matsushita Electric Works Co., Ltd. (56) References JP-A-5-64785 (JP) JP-A-5-49096 (JP, A) JP-A-4-150994 (JP, A) JP-A-4-326985 (JP, A) JP-A-5-22093 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) C02F 1/46

Claims (1)

(57) [Claims 1] An electrolytic tank for generating alkaline ionized water and acidic ionized water by electrolysis and discharging the electrolyzed water separately, and a pH value of the electrolyzed water PH sensor that continuously measures pH and pH obtained from this pH sensor
A control circuit that compares the value with the target pH value and performs feedback control on the electrolytic voltage applied to the electrolytic cell, and the control circuit controls the electrolytic voltage for obtaining the electrolytic water having the target pH value. An electrolyzed water generation apparatus characterized in that when the pH value of electrolyzed water obtained at the time of addition does not reach the target pH value, the target pH value is increased to control the electrolysis voltage.