JP2001219169A - Electrolytic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take in electrolytic water with accurate desired concentration from low concentration to high concentration in a diaphragm-free electrolytic apparatus. SOLUTION: Water is electrolyzed in a state stagnated in an electrolytic cell 20 and a mixing means 29 is controlled correspondingly to the concentration of formed electrolytic water to supply electrolytic water with arbitrary concentration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolysis apparatus in which an aqueous solution of sodium chloride is supplied to a non-diaphragm electrolytic cell and electrolyzed (hereinafter referred to as electrolysis) so that electrolyzed water can be supplied as sterilized water.

[0002]

2. Description of the Related Art Conventionally, there has been an electrolysis apparatus which can supply electrolyzed water as sterilized water by supplying an aqueous sodium chloride solution to a non-diaphragm electrolyzer and electrolyzing it (for example, see Japanese Patent Application Laid-Open No. Hei 4
-94785).

As shown in FIG. 5, this electrolyzer 1 is a non-diaphragm type electrolysis tank, in which a pair of a cathode 2 and an anode 3 are formed. A water supply pipe 4 is connected to a water supply side of the electrolytic cell 1 and a water discharge pipe 5 is connected to an outlet side of the electrolytic cell 1 to constitute a continuous electrolytic water generating apparatus.

A sodium chloride addition device 7 for adding an aqueous solution of sodium chloride (NaCl) 6 to water and a hydrochloric acid addition device 9 for adding an aqueous solution of hydrochloric acid (HCl) 8 to the water supply pipe 4 connect the chemical supply pipes 12 and 13 to each other. Connected through.

Further, chemical supply pipes 12, 13 of the water supply pipe 4 are provided.
A bypass pipe 15 branched at the raw water branching section 14 is connected to the upstream of the connecting section so as to join the flow of the water discharge pipe 5 at the mixing section 16.

Reference numeral 17 denotes a valve for adjusting the flow rate of the electrolyzed water, which is provided in the water supply pipe 4, and reference numeral 18 denotes a bypass pipe 15 for the raw water.
A valve for adjusting the flow rate is provided in the bypass pipe 15.

Reference numeral 19 denotes a DC power supply for supplying electricity to the cathode 2 and the anode 3.

In the above configuration, when the raw water is supplied from the water supply pipe 4 and the flowing water is electrolyzed while the sodium chloride adding device 7 and the hydrochloric acid adding device 9 are driven, a large amount of hypochlorous acid water is contained in the electrolytic cell 1. The water is discharged from the water discharge pipe 5 as electrolyzed water. On the other hand, the raw water from the bypass pipe 15 is combined with the electrolyzed water in the mixing section 16, diluted, mixed, and taken in. This mixing ratio is determined by adjusting the opening degrees of the valves 17 and 18.

[0009]

The above-described conventional electrolysis apparatus has the following problems.

(1) In a kitchen, high-concentration sterilizing water is required not only for sterilization of fingers but also for bleaching of a towel and prevention of slimming of a drain port. In a conventional example, a continuous electrolytic water generating apparatus is used. Since the electrolysis operation is performed while flowing water, the electrolysis energy per unit water amount at the time of electrolysis is reduced, so that a high concentration of hypochlorous acid cannot be generated. In order to achieve this, it is necessary to increase the electrode area and also increase the amount of electricity required for electrolysis, which leads to an increase in the size and cost of the electrolytic device and an increase in running costs.

(2) The concentration of hypochlorous acid in electrolyzed water can be changed by changing the ratio of dilution and mixing. However, there is no way to know how much the concentration is. Or low concentrations without bactericidal effects.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a water supply means and at least a pair of electrodes, wherein water supplied from the water supply means stays inside. An electrolytic cell that generates electrolyzed water by electrolysis, and a chlorine ion supply means connected to the electrolytic cell and capable of supplying chlorine ions to the electrolytic cell, and connected to the upstream side of the electrolytic cell, Mixing means capable of mixing the water supplied from the water supply means, an electrolytic water supply path capable of taking in the mixed water mixed by the mixing means, setting means for setting the concentration of the electrolytic water in the mixed water, and water supply means And control means for controlling at least one operation of the electrolytic cell, the chlorine ion supply means, and the mixing means, wherein the control means controls the mixing means in accordance with the set value of the setting means and the electrolytic water concentration of the electrolytic cell. Is what you do.

The gist of the present invention is that water is retained in an electrolytic cell,
Electrolysis water produced by electrolysis in a batch state is supplied at an arbitrary concentration by mixing means, water is supplied from the water supply means to the electrolytic tank by the control means, and then the electrolytic water is supplied to the electrolytic tank by the chlorine ion supply means. After supplying chlorine ions to the electrodes and supplying electricity to the electrodes to generate electrolyzed water in the electrolytic cell, water is supplied again by the water supply means and the electrolytic water in the electrolytic cell is discharged. The discharged electrolyzed water is mixed with water from the water supply means at a predetermined ratio by the mixing means, so that water diluted to a predetermined concentration can be collected. Therefore, water containing high to low concentration of electrolyzed water can be produced by the mixing means, so that it can be used for various purposes such as sterilization of fingers (hypochlorous acid concentration of 50 ppm or less) to bleaching of cloth width (hypochlorous acid concentration of 1000 ppm or more). The concentration of electrolyzed water can be obtained.

[0014]

An electrolyzing apparatus according to a first aspect of the present invention has a water supply means and at least a pair of electrodes. Water supplied from the water supply means stays inside, and is electrolyzed by electrolysis. An electrolytic cell for generating water, a chlorine ion supply means connected to the electrolytic cell and capable of supplying chlorine ions to the electrolytic cell, and an upstream side of the electrolytic cell connected to the electrolytic cell and supplied from the water supply means. Mixing means capable of mixing water, an electrolytic water supply path capable of taking mixed water mixed by the mixing means, setting means for setting an electrolytic water concentration of the mixed water, a water supply means, an electrolytic cell, and chlorine ion Supply means and control means for controlling at least one operation of the mixing means, wherein the control means controls the mixing means by predicting or detecting the set value of the setting means and the concentration of electrolytic water in the electrolytic cell. Like that.

Then, water is supplied from the water supply means into the electrolytic cell by the control means, and then chlorine ions are supplied into the electrolytic cell by the chlorine ion supply means, and electricity is supplied to the electrodes, so that the electrolytic water is supplied into the electrolytic cell. After generation, water is supplied again by the water supply means, and the electrolytic water in the electrolytic cell is discharged. The discharged electrolyzed water is mixed with water from the water supply means at a predetermined ratio by the mixing means according to the concentration of the electrolyzed water, so that water diluted to a predetermined concentration can be collected.

Further, the control means of the electrolysis apparatus according to claim 2 of the present invention predicts a change in the concentration of electrolytic water in the electrolytic cell, and sets the mixing ratio of the mixing means from the predicted concentration based on the set value of the setting means. And the mixing means is controlled according to the mixing ratio.

Since the concentration of electrolytic water in the electrolytic cell, which constantly changes, is predicted and the mixing ratio is determined based on the predicted value, water diluted to a predetermined concentration can be taken accurately.

In the electrolyzing apparatus according to a third aspect of the present invention, an electrolyzed water sensor is provided in the electrolyzer, and as control means, during supply of water, according to a deviation between the electrolyzed water sensor and a set value of the setting means. The mixing means is controlled.

Since the concentration of the electrolyzed water in the electrolytic cell, which constantly changes, is detected by the electrolyzed water sensor, and the mixing means is controlled based on this value, the water diluted to the predetermined concentration can be taken out accurately. .

In the electrolyzing apparatus according to a fourth aspect of the present invention, an electrolyzed water sensor is provided in the electrolyzed water supply path, and the control means controls a difference between the electrolyzed water sensor and a set value of the setting means during water supply. To control the mixing means.

Then, the mixing means is feedback-controlled so that the concentration of the electrolyzed water detected by the electrolyzed water sensor becomes a set value. Can take water.

Further, in the electrolysis apparatus according to claim 5 of the present invention, when the remaining amount of the electrolyzed water in the electrolyzer decreases to a predetermined value or less, the electrolysis is started and the supply of the electrolyzed water is prohibited. I am trying to do it.

Then, electrolysis is performed so that the electrolyzed water in the electrolyzer does not become lower than a predetermined value, and the supply of the electrolyzed water is stopped during electrolysis. Therefore, even if the electrolyzed water is insufficient, the electrolyzed water concentration does not become lower than the predetermined value. Therefore, the electrolyzed water can maintain a predetermined or higher sterilizing effect.

In the electrolyzing apparatus according to a sixth aspect of the present invention, the concentration prediction according to the second aspect is preliminarily stored with an electrolytic water concentration decay characteristic determined from an electrolytic water generation concentration, an elapsed time, and a water supply amount to the electrolytic cell. The concentration of the electrolyzed water is predicted from the electrolyzed water concentration attenuation characteristics.

From the elapsed time and the attenuation characteristics due to water supply, which are the main factors of the concentration attenuation of the electrolyzed water, the concentration of the electrolyzed water is predicted based on the actual elapsed time and the amount of water supply, based on the electrolyzed water generation concentration immediately after electrolysis. Therefore, an accurate density change is required.

In the electrolyzing apparatus according to a seventh aspect of the present invention, the electrolyzed water generation concentration according to the sixth aspect is stored in advance with an electrolyzed water generation concentration characteristic determined by a chlorine ion supply amount and an amount of electricity supplied to the electrode. The concentration of electrolyzed water generation is determined from the characteristics of electrolyzed water generation concentration.

Since the concentration of the electrolyzed water is determined on the basis of the main factors, that is, the amount of chloride ions and the amount of electricity to the electrodes, the accurate concentration of the electrolyzed water can be known.

Further, in the electrolysis apparatus according to claim 8 of the present invention, the control means is configured to discharge the electrolyzed water from the electrolyzer when the elapsed time from the generation of the electrolyzed water exceeds a predetermined time.

When the electrolyzed water is left for a long time (predetermined time) after the electrolyzed water is generated, the electrolyzed water is discharged, so that the concentration decrease due to the electrolyzed water concentration decay is reset and new electrolysis can be performed. Therefore, accurate and high-concentration electrolyzed water can be held.

In the electrolyzing apparatus according to the ninth aspect of the present invention, an electrolyzed water sensor is provided in the electrolyzer, and as a control means, the amount of electricity supplied to the electrode is controlled according to the rate of increase in the electrolyzed water concentration during electrolysis. Is what you do.

The rate of increase in the concentration of the electrolyzed water changes depending on the variation in the supply amount of chlorine ions. Therefore, an accurate amount of electrolyzed water can be obtained by determining the amount of electricity to the electrode required for the electrolyzed water concentration to be the target concentration according to the rising speed and performing electrolysis.

Further, in the electrolysis apparatus according to claim 10 of the present invention, an electrolysis water sensor is provided in the electrolysis tank, and the control means includes:
The amount of chlorine ions supplied by the chlorine ion supply means is controlled in inverse proportion to the rate of increase in the concentration of electrolyzed water during electrolysis.

The rate of increase in the concentration of the electrolyzed water is proportional to the supply amount of chlorine ions. From this, the supply amount of chlorine ions is estimated from the rising speed of the electrolyzed water immediately after the start of electrolysis, and if the rising speed is low, more chlorine ions are additionally supplied. Adjust to supply volume. Therefore, it is possible to supply chlorine ions accurately.

The electrolyzing apparatus according to the eleventh aspect of the present invention has a plurality of selection switches as setting means, and the control means controls a plurality of set values of the electrolytic water concentration and the water supply amount according to the selection switches. , A set of set values is called out, the water supply means is controlled according to the selected water supply amount, and the mixing means is controlled according to the selected electrolytic water concentration.

When a switch suitable for the intended use is turned on from among the selection switches, the concentration of the electrolyzed water and the amount of water supply associated with the switch are selected, and the electrolyzed water having the selected concentration and amount can be taken. Therefore, versatile electrolyzed water can be selected with a single switch.

[0036]

(Embodiment 1) FIG. 1 is a schematic diagram of an electrolytic apparatus showing Embodiment 1 of the present invention. In FIG. 1, reference numeral 20 denotes the anode 2
An electrolytic cell in which a pair of electrodes 1 and a cathode 22 are installed facing each other. A water outlet 23 is provided at an upper portion, a water inlet 24 is provided at a central portion, and a saline solution inlet 25 is provided at a lower portion. 26 is a water supply channel 27
The water supply means is provided in communication with the water inlet 24 of the electrolytic cell 20, and is configured to be able to supply water into the electrolytic cell 20. The water supply means 26 is an electric on-off valve.

Reference numeral 28 denotes a water discharge passage, which is connected so that the electrolytic water from the water discharge port 23 is communicated with the mixing means 29. Reference numeral 30 denotes a bypass passage, which connects the water on the downstream side of the water supply means 26 of the water supply path 27 to the mixing means 29. Mixing means 2
9 mixes the electrolyzed water in the water discharge passage 28 and the water in the bypass passage 30 at an arbitrary mixing ratio, and mixes the mixed water with the electrolyzed water supply passage 31.
It is piped to discharge to The mixing means 29 is composed of a mixing valve that changes the mixing ratio by an electric motor (not shown).

Reference numeral 32 denotes a drain valve provided in the water discharge passage 28 for switching the flow of the water discharge passage 28 between the mixing means 29 side and the drain passage 33 side.

Reference numeral 34 denotes a DC power supply for applying a voltage to both electrodes 21 and 22 to electrolyze water. 35 is an electrolytic cell 20
Is a chlorine ion supply means for supplying a salt solution to a salt tank 37 filled with salt 36 in a solid state and an electrolytic tank 20.
A water supply pump 39 for supplying a saline solution via a water supply pipe 38 branched from the upstream of the water supply line and a salt supply passage 40, and a predetermined amount of a saturated saline solution (a salt concentration of 26%) is supplied in the electrolytic cell 20.

Reference numeral 41 denotes an electrolyzed water sensor.
1 is provided to detect the concentration of electrolyzed water. This electrolyzed water refers to hypochlorous acid.

Reference numeral 42 denotes control means for controlling the above-mentioned components based on the set values set by the setting means 43. The setting means 43 is provided with three types of use-specific selection switches 44.

Next, the operation and operation of this embodiment in the above configuration will be described with reference to FIGS.

In FIG. 2, when operation is started at 50, 5
Perform the drainage operation of 1. This drainage operation is performed first by the drain valve 32.
Is switched to the drain passage 33 side, and the water supply means 26 is opened.
Then, the water flows into the electrolytic cell 20 from the water supply channel 27, and the electrolytic water remaining in the electrolytic cell 20 is discharged through the drainage channel 33.

Next, the operation shifts to the salt supply operation of 52. Here, the water supply pump 39 is operated to supply water into the salt tank 37 via the water supply pipe 40, and the saturated saline solution inside the electrolytic tank 20 is supplied.
And stored at the bottom of the electrolytic cell 29.

Next, in the electrolytic operation of 53, the DC power supply 34 is operated, a voltage is applied between the electrodes 21 and 22, and electrolysis is started.

Immediately after the start of electrolysis, most of the electrodes 21 and 22 are in contact with water, so that electrolysis of water occurs preferentially and hydrogen and oxygen gas are generated between the electrodes 21 and 22. Since these gases are lighter than tap water, the electrolytic cell 20
Ascends to the upper part of. The movement of this gas causes the electrode 2
An upward flow of water occurs between 1 and 22. And
The saline solution retained at the bottom of the electrolytic cell 20 is sucked up between the electrodes 21 and 22 by the flow of water generated by the floating of the gas, and diffuses into the water in the electrolytic cell 20. Generally, the higher the chloride ion concentration, the more chlorine compounds such as hypochlorous acid (hereinafter, referred to as
It is said that the production efficiency of (hypochlorous acid) is increased, and the reaction of (Chem. 1) is likely to occur.

[0047]

Embedded image

When hypochlorous acid is produced by electrolysis, the amount of the supplied saline greatly affects the production efficiency of hypochlorous acid. That is, when the supply amount of the saline solution to the electrolytic cell 20 increases, the generation efficiency increases, the concentration of generated hypochlorous acid in the electrolytic cell 20 increases, and when the supply amount of the saline solution decreases, the hypochlorous acid decreases. Since the concentration of the generated acid is low, a fixed amount of saturated saline is sent by the water supply pump 39.

Further, a DC power supply 34 is provided between the electrodes 21 and 22.
Therefore, if current is supplied for a predetermined time at a constant current, hypochlorous acid having substantially the same concentration can be generated each time. That is, the production concentration of hypochlorous acid, which is electrolyzed water, depends on the supply amount of salt and the electrodes 21 and 22.
Is determined by the amount of current supplied to the When the electrolysis operation is completed, the drain valve 32 is switched to the mixing means 29 side.

Next, the process proceeds to the determination of the selection switch at 54. This is to switch the set value of electrolyzed water for each application when the selection switch 44 is pressed, and set the electrolyzed water concentration setting A to 50 ppm at 55 when the hand washing switch is pressed,
Set the water supply time B to 30 seconds. When the sterilization switch is pressed, the electrolytic water concentration setting A is set to 200 ppm at 56 and the water supply time B is set to 10 seconds. When the bleaching switch is pressed, the electrolytic water concentration setting A is set to 1000pp at 57.
Set to m and water supply time B to 120 seconds. In this way, a plurality of electrolytic water concentration set values and water supply times suitable for the intended use are stored, and a set of conditions can be called from the storage means in accordance with the selection switch 44.

At 58, the operation is judged. Here, the selection switch 44 is not pressed, or the selected water supply time B
Has elapsed, the water supply means 26 is closed at 59 and 5
The process returns to the selection switch determination of 4. Also, the selection switch 44
Is pressed, and if the elapsed time is within the range of the selected water supply time B, the water supply means 26 is opened at 60 and the supply operation of the electrolytic water is performed. Further, when the elapsed time from the previous electrolysis operation exceeds a predetermined time such as 24 hours, the operation is returned to the drainage operation of 51.

When the water supply means 26 is opened at 60, water is supplied to the electrolytic cell 20, and high-concentration (for example, 2000 ppm) electrolytic water in the electrolytic cell 20 is supplied to the mixing means 29 through the water discharge passage 28.
Is discharged. On the other hand, water is supplied to the mixing means 29 from the bypass path 30, and the mixed and diluted electrolytic water is taken from the electrolytic water supply path 31.

At 61, the concentration of hypochlorous acid in the mixed and diluted electrolytic water is detected by the electrolytic water sensor 41 provided in the electrolytic water supply passage 31.

At 62, the mixing ratio of the mixing means 29 is feedback-controlled so that the deviation (AC) between the electrolytic water concentration setting A and the concentration C detected by the electrolytic water sensor 41 becomes zero. That is, when the deviation is positive, the ratio is increased, and when the deviation is negative, the ratio is decreased.

Step 63 predicts the concentration of hypochlorous acid in the electrolytic cell. If there is enough concentration, the operation returns to the selection switch determination of 54 to continue the operation. , 64, the supply of the electrolyzed water is stopped, and the operation returns to the draining operation of 51.

In order to predict the concentration of hypochlorous acid in the electrolytic cell, the electrolytic water concentration decay characteristic is experimentally obtained in advance, and the concentration is predicted from the characteristic. (Equation 1) shows a characteristic example.

X = D−E · t−F · Δw (1) where X: predicted value of hypochlorous acid concentration D: initial concentration of hypochlorous acid immediately after electrolysis E: coefficient of elapsed time t: from the end of electrolysis F: Coefficient of water supply amount Σw: Integrated value of water supply amount from the end of electrolysis And, when this predicted value decreases below a predetermined value (for example, 1000 ppm), it is determined that the concentration is insufficient and water supply is stopped. .

The concentration of electrolyzed water, which is the initial concentration D of hypochlorous acid, depends on the supply amount s of salt and the electrode 21, as described above.
22 is determined by the amount of current q. Therefore, it is obtained from (Equation 2).

D = G · s · q (2) where G: coefficient of the amount of supplied salt and the amount of supplied electricity (non-linear amount of supplied salt s
As described above, according to the present embodiment, an appropriate amount of electrolyzed water having a required hypochlorous acid concentration can be taken by simply pressing the selection switch 44 for each intended use. Here, 50 ppm of hypochlorous acid-concentrated electrolyzed water is used for hand washing for 30 seconds. When a sterilizing switch is pressed as sterilizing water used for sterilizing a kitchen knife, a cutting board, or the like, electrolytic water having a concentration of 200 ppm can be taken for 10 seconds. In addition, for bleaching sterilization of cloths, cups, etc., pressing the bleaching switch causes a high concentration of 1000 ppm of electrolyzed water to reach 12%.
Can take water for 0 seconds.

At this time, the concentration of hypochlorous acid in the electrolyzed water is detected by the electrolyzed water sensor, and the mixing ratio of the mixing means is feedback-controlled, so that the electrolyzed water of a required concentration can be obtained with high accuracy.

In addition, it is determined in advance that the concentration of hypochlorous acid in the electrolytic cell will be insufficient due to the decrease in the concentration of hypochlorous acid in the electrolytic cell caused by using or leaving the electrolytic water. The required concentration is not lost during feeding. Since the attenuation of the hypochlorous acid concentration is estimated from the amount of supplied salt, the amount of electricity supplied to the electrodes, the elapsed time, and the amount of water supply, there is no need for a sensor or the like, and no cost is required.

Further, before starting the electrolytic operation, the electrolytic cell 2
Since the remaining electrolyzed water in the water within 0 is drained, the concentration of hypochlorous acid in the electrolyzer 20 is temporarily reset to the level of tap water,
Electrolyzed water having an accurate concentration can be obtained by the amount of supplied salt and the amount of electricity supplied to the electrodes 21 and 22.

Further, when a certain required time (for example, 24 hours) elapses from the electrolysis operation, the remaining electrolyzed water in the electrolysis tank 20 is automatically drained and the electrolysis operation is performed again. Can be kept.

(Embodiment 2) Next, the invention of Embodiment 2 will be described.

The difference between the second embodiment and the first embodiment is that
In the control of the mixing means in 2, the concentration of hypochlorous acid in the electrolytic cell is predicted, and when the predicted value of hypochlorous acid concentration X and the water to be supplied are mixed, the concentration of the mixed electrolytic water becomes The point is that the mixing ratio of the mixing means 29 is controlled so as to achieve the water concentration setting A. That is, the relationship between the drive amount of the mixing means 29 and the mixing ratio is determined in advance, and the mixing is driven to achieve the required mixing ratio. The components having the same structure as the electrolytic device of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The hypochlorous acid concentration prediction X is the same as described in the first embodiment.

The mixing ratio Y of the electrolytic water in the mixing means 29 is obtained by (Equation 3).

Y = (A−G) / (X−G) (3) where G: concentration of hypochlorous acid in water (If X is at a level of 1000 ppm, there is no problem ignoring G) Since there is no detection delay of the electrolytic water sensor, a predetermined concentration of hypochlorous acid can be taken from the start of supply.

Further, since the present invention can be realized even without the electrolytic water sensor, the cost can be reduced.

(Embodiment 3) Next, the invention of Embodiment 3 will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 3 is a schematic view of an electrolyzer according to a third embodiment.

The difference between the third embodiment and the first embodiment is that an electrolytic water sensor 45 for detecting the concentration of hypochlorous acid in the electrolytic bath 20 of FIG. 3 is provided, and the electrolytic water sensor 61 shown in FIG. In the concentration detection, the concentration of hypochlorous acid in the electrolytic cell 20 is detected by the electrolytic water sensor 45, the mixing means 29 is controlled based on the detected value at 62 in FIG. The point 63 is that the insufficient density is determined based on the detected value. The components having the same structures as those of the electrolysis devices of Example 1 and Example 2 are denoted by the same reference numerals, and detailed description is omitted.

The control of the mixing means 29 at 62 is such that the hypochlorous acid concentration predicted value X in the second embodiment is replaced by the detected value Z of the electrolyzed water sensor 45. That is, the mixing ratio Y of the electrolytic water in the mixing means 29 is obtained by (Equation 4).

Y = (AG) / (Z−G) (4) According to this method, the concentration of hypochlorous acid is directly detected by the electrolyzed water sensor 45, so that more accurate mixing control can be performed.

The determination of whether the concentration is insufficient is also made by replacing the predicted value of hypochlorous acid concentration X of the first embodiment with the detection value Z of the electrolyzed water sensor 45.

Embodiment 4 Next, the invention of Embodiment 4 will be described.

FIG. 4 is a flowchart of the salt supply and electrolysis operation control in the fourth embodiment.

The fourth embodiment differs from the first and third embodiments in that the supply of salt and the control of the electrolytic operation of 52 and 53 in FIG. 2 are controlled as shown in FIG. In addition, the same code | symbol is attached | subjected to the thing of the same structure as the electrolysis apparatus of Example 1 and Example 3,
Detailed description is omitted.

In FIG. 4, at 71, the water supply pump 39 operates to supply the saturated saline solution in the salt tank into the electrolytic tank 20 and accumulate at the bottom of the electrolytic tank 29. Here, the saline solution is supplied to be smaller than the supply amount considered to be the target amount. Then, at 72, a voltage is applied between the electrodes 21 and 22 to start electrolysis, and at 73, the concentration of hypochlorous acid in the electrolytic cell 20 is detected by the electrolytic water sensor 45. Numeral 74 is obtained by calculating the rate of rise of the detected density. At 75, if the rising speed does not reach the predetermined value, the flow returns to the salt supply at 71.

If the rising speed exceeds a predetermined value, the operation proceeds to the electrolysis operation of 76. Here, the rate of increase in the concentration of hypochlorous acid is 7
The amount of hypochlorous acid is closely related to the amount of chloride ion, which is closely related to the amount of saline solution supplied in step 1.
Therefore, if the amount of current supplied to the electrodes is constant, the supply rate of chlorine ions is derived from the rate of generation of hypochlorous acid. That is, the supply amount of the salt can be known, and the salt can be supplied with high accuracy. The fact that the rising speed has not reached the predetermined value in 75 means that the supply amount of salt is insufficient, and that the rising speed exceeds the predetermined value means that the supply amount of salt has reached the predetermined value. means.

At 76, a normal electrolysis operation is performed. And 77
Then, it is determined whether the time required to reach the predetermined concentration from the rate of increase in the concentration of hypochlorous acid has elapsed, and the electrolysis operation of 76 is repeated until the time has elapsed. By generating the predetermined concentration of hypochlorous acid from the rate of increase in hypochlorous acid concentration,
Even if the variation in the absolute value of the electrolyzed water sensor 45 is large, the target concentration of hypochlorous acid can be obtained as long as the relative value is accurate.

[0082]

As is apparent from the above description, according to the electrolysis apparatus according to the first aspect of the present invention, water is supplied from the water supply means into the electrolytic cell by the control means, and then the water is supplied by the chlorine ion supply means. After supplying chlorine ions into the electrolytic cell and energizing the electrodes to generate electrolytic water in the electrolytic cell, water is supplied again by the water supply means and the electrolytic water in the electrolytic cell is discharged. The discharged electrolyzed water is mixed with water from the water supply means at a predetermined ratio by the mixing means according to the concentration of the electrolyzed water, so that water diluted to an arbitrary predetermined concentration can be taken.

According to the electrolyzing apparatus of the second aspect of the present invention, the change in the concentration of the electrolyzed water in the electrolytic cell is predicted, and the mixing ratio of the mixing means is determined from the predicted concentration with the set value of the setting means as a target. Since the mixing means is controlled in accordance with the mixing ratio, even if the concentration of the electrolyzed water in the electrolytic cell changes, the change can be predicted, and the water diluted to a predetermined concentration can be taken out accurately.

According to the electrolysis apparatus of the third aspect of the present invention, the water fed from the water supply means and the electrolyzed water are sent to the equalizing tank, whereby the electrolyzed water and the water sent from the water supply means are stirred. Therefore, even when the specific gravity difference is large, a constant concentration can be maintained when water is taken from the electrolytic water supply passage.

According to the electrolysis apparatus of the fourth aspect of the present invention, the mixing means is feedback-controlled so that the concentration of the electrolyzed water detected by the electrolyzed water sensor provided in the electrolyzed water supply passage becomes a set value. Irrespective of the change of water and the nature of the water to be diluted, it is possible to always and stably and accurately take out water diluted to a predetermined concentration.

According to the electrolysis apparatus of the fifth aspect of the present invention, when the remaining amount of the electrolyzed water in the electrolyzer decreases to a predetermined value or less, electrolysis is started and the supply of the electrolyzed water is prohibited.
Even if the amount of electrolyzed water is insufficient, the concentration of electrolyzed water does not fall below a predetermined value. Therefore, the electrolyzed water can maintain a predetermined or higher sterilizing effect.

According to the electrolysis apparatus of the sixth aspect of the present invention, based on the elapsed time and the attenuation characteristics due to water supply, which are the main factors of the concentration attenuation of the electrolyzed water, the actual concentration of the electrolyzed water generated immediately after electrolysis is used as a reference. Since the concentration of the electrolyzed water is predicted based on the elapsed time and the amount of supplied water, an accurate change in the concentration is required.

According to the electrolysis apparatus according to the seventh aspect of the present invention, since the concentration of electrolyzed water is determined based on the main factors, that is, the amount of chloride ions and the amount of electricity to the electrodes, the concentration of electrolyzed water generated is accurately determined. You can know.

According to the electrolysis apparatus of the present invention, if the electrolyzed water is left for a long time (predetermined time) after the electrolyzed water is generated, the electrolyzed water is discharged. Since the concentration decrease due to the attenuation is reset and new electrolysis can be performed, accurate and high-concentration electrolyzed water can be held.

According to the electrolysis apparatus of the ninth aspect of the present invention, the rate of increase in the concentration of the electrolyzed water changes depending on the variation in the supply amount of chlorine ions. Therefore, an accurate amount of electrolyzed water can be obtained by obtaining the amount of electricity to the electrode required for the electrolyzed water concentration to be the target concentration according to the rising speed and performing electrolysis.

According to the electrolyzing apparatus of the tenth aspect of the present invention, the rate of increase in the concentration of the electrolyzed water is proportional to the supply amount of chlorine ions. From this, the supply amount of chlorine ions is estimated from the rising speed of the electrolyzed water immediately after the start of electrolysis, and if the rising speed is low, more chlorine ions are additionally supplied. Adjust to supply volume. Therefore, it is possible to supply chlorine ions accurately.

According to the electrolysis apparatus according to the eleventh aspect of the present invention, when a switch suitable for the intended use is turned on from among the selection switches, the electrolytic water concentration and the water supply amount associated with the switch are selected, and the selection is made. Electrolyzed water of the concentration and amount of value can be taken. Therefore, versatile electrolyzed water can be selected with a single switch.

[Brief description of the drawings]

FIG. 1 is a schematic view of an electrolyzer according to a first embodiment of the present invention.

FIG. 2 is a flowchart of the electrolysis apparatus.

FIG. 3 is a schematic view of an electrolysis apparatus showing Examples 3 and 4 of the present invention.

FIG. 4 is a flowchart of an electrolysis apparatus showing a fourth embodiment of the present invention.

FIG. 5 is a schematic view of an electrolysis apparatus showing a conventional example.

[Explanation of symbols]

 Reference Signs List 20 electrolytic bath 21, 22 electrode 26 water supply means 29 mixing means 31 electrolytic water supply path 35 chloride ion supply means 41 electrolytic water sensor 42 control means 43 setting means 44 selection switch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/50 560 C02F 1/50 560F 1/76 1/76 A C25B 1/00 C25B 1/00 Z 9 / 00 9/00 D (72) Inventor Tomohide Matsumoto 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture F-term (reference) 4D050 AA04 BB04 BD04 BD08 4D061 DA03 DB01 DB10 EA02 EB02 EB04 EB14 EB19 EB20 EB37 EB39 ED12 ED13 FA20 GA20 GC04 GC06 GC12 4K021 AA03 BA03 BA05 BB01 BC03 CA08 CA10 DA01 DA10 DC11

Claims (11)

[Claims] An electrolytic cell having a water supply means and at least one pair of electrodes, wherein the water supplied from the water supply means stays inside, and is electrolyzed to generate electrolyzed water. A chlorine ion supply means capable of supplying chlorine ions to the electrolytic cell, a mixing means connected to the upstream side of the electrolytic cell and capable of mixing electrolytic water and water supplied from a water supply means, and mixing by the mixing means. Electrolytic water supply path capable of taking the mixed water to be taken, and setting means for setting the concentration of the electrolytic water of the mixed water,
Water supply means, an electrolytic cell, a chlorine ion supply means, and control means for controlling at least one operation of the mixing means, wherein the control means predicts or detects the set value of the setting means and the concentration of electrolytic water in the electrolytic cell. Electrolyzer that controls the mixing means by doing. 2. The control means predicts a change in the concentration of electrolyzed water in the electrolytic cell, calculates a mixing ratio of the mixing means from the predicted concentration with a target value set by the setting means as a target, and determines the mixing means in accordance with the mixing ratio. The electrolyzer according to claim 1, which controls the following. 3. An electrolytic water sensor is provided in the electrolytic cell, and the control means calculates a mixing ratio of the mixing means from the detected concentration of the electrolytic water sensor with a target value set by the setting means as a target. The electrolytic device according to claim 1, wherein the mixing device is controlled. 4. The electrolysis apparatus according to claim 1, wherein an electrolyzed water sensor is provided in the electrolyzed water supply path, and the control means controls the mixing means during water supply according to a deviation between the electrolyzed water sensor and a set value of the setting means. apparatus. 5. The method according to claim 1, wherein the controller starts electrolysis and inhibits the supply of the electrolyzed water when the remaining amount of the electrolyzed water in the electrolyzer falls below a predetermined value. Electrolysis equipment. 6. A concentration predicting means for storing in advance an electrolytic water concentration attenuation characteristic determined from an electrolytic water generation concentration, an elapsed time, and a water supply amount to an electrolytic cell, and predicting the electrolytic water concentration from the electrolytic water concentration attenuation characteristic. Item 3. The electrolytic device according to Item 2. 7. An electrolyzed water generation concentration, wherein an electrolyzed water generation concentration determined by a supply amount of chlorine ions and an amount of electricity supplied to an electrode is stored in advance, and the electrolyzed water generation concentration is determined from the electrolyzed water generation concentration characteristics. Electrolysis equipment. 8. The electrolysis apparatus according to claim 1, wherein the control means discharges the electrolyzed water from the electrolyzer when the elapsed time from the generation of the electrolyzed water exceeds a predetermined time. 9. The electrolysis water sensor according to claim 1, wherein an electrolysis water sensor is provided in the electrolysis tank, and the control means controls the amount of electricity supplied to the electrode in accordance with the rate of increase in the electrolysis water concentration during electrolysis. Electrolysis equipment. 10. An electrolytic water sensor provided in an electrolytic cell, wherein the control means controls the chlorine ion supply amount by the chlorine ion supply means in inverse proportion to the rate of increase of the electrolytic water concentration during electrolysis. The electrolytic device according to any one of claims 9 to 13. 11. The setting means has a plurality of selection switches, and the control means calls a set of set values from among a plurality of set values of the concentration of electrolytic water and the amount of supplied water in accordance with the selection switches. The water supply means is controlled according to the supplied water supply amount, and the mixing means is controlled according to the selected electrolytic water concentration.
11. The electrolytic device according to any one of claims 10 to 10.