JP2003088865A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment apparatus in which strong bactericidal activity is exhibited and stable sterilization is performed in the water treatment apparatus for sterilizing water to be treated using an electrolytic cell. SOLUTION: In the water treatment apparatus provided with a water tank storing water to be treated, the diaphragmless electrolytic cell for sterilizing the water to be treated by energizing an electrode group composed of at least 2 pieces of the electrodes to cause an electrochemical decomposition and a water treatment route for introducing the water to be treated from the water tank and refluxing the water to be treated after sterilization to the water tank, a pH adjusting means for adjusting the pH of the water to be treated is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is stored in various water tanks, from large water tanks such as pools and bathtubs to water tanks arranged on rooftops of buildings and small water tanks such as baths for general households. The present invention relates to a novel water treatment device capable of sterilizing treated water.

[0002]

2. Description of the Related Art For example, a pool installed indoors or outdoors, or a bathtub in an inn or a public bath, is called a so-called (salmon powder) to maintain its water quality.
It is necessary to sterilize by adding an aqueous solution of highly-polished powder) or sodium hypochlorite (NaCIO). However, in the past, this work has been done manually by employees at pools and baths, and since the aqueous solution of bleach and sodium hypochlorite is irritating, it is especially necessary to put it in during business hours. You have to be very careful when working,
There has been a problem that it takes a lot of labor to process it. Therefore, the applicant of the present invention has invented a water treatment device that introduces the water to be treated stored in each of the above-mentioned water tanks into the electrolytic tank and sterilizes it by an electrochemical reaction. In the water treatment device according to the present invention, the water to be treated is supplied to the electrolytic bath having the electrodes, and an electrochemical reaction (so-called electrolysis) is performed on the water to be treated. Chlorine gas, hypochlorous acid (HCIO), hypochlorite ion, etc. are generated by the applied electrochemical reaction, and these act on the treated water, so that the treated water is sterilized. ing. An object of the present invention is to provide a novel water treatment device that can easily and efficiently sterilize the water to be treated stored in the above various water tanks.

[0003]

Generally, hypochlorous acid in an aqueous solution is affected by PH of the aqueous solution as shown in FIG. 7, and chlorine gas (Cl ₂ ) and molecular hypochlorous acid (HClO) are generated. an ion-like hypochlorite ions (ClO ^-) abundance ratio of the changes. That is, the presence ratio of chlorine gas on the strongly acidic side, the hypochlorous acid on the weakly acidic side, and the hypochlorite ion on the weakly alkaline side increases. Of these, hypochlorous acid has the highest bactericidal activity, and in general, the bactericidal activity of hypochlorous acid and hypochlorite ion is 10
It is known to be 0 to 1000 times different. Therefore, in order to increase the bactericidal activity, it is preferable to set the pH of the aqueous solution in the weakly acidic range where the abundance ratio of hypochlorous acid is the highest as can be seen from FIG.

However, in general, when electrolysis is carried out in a non-diaphragm electrolytic cell, the PH value of the aqueous solution shifts to the higher side. That is, since the pH changes to the weakly alkaline side, there is a problem that the abundance ratio of hypochlorous acid (HClO), which has a relatively strong bactericidal power, decreases, resulting in a weak bactericidal power.

When an aqueous solution containing an electrolyte solution such as salt water is electrolyzed to produce hypochlorous acid, the conversion efficiency into hypochlorous acid is determined by the amount of chlorine passing between the electrodes per unit time. And is affected by the value of the current flowing between the electrodes. Therefore, in the case of a water treatment device in which salt water is added to the water to be treated from a salt water tank to generate an electrolyte solution of a predetermined concentration, and the electrolyte solution is electrolyzed to sterilize the water to be treated, it is added to the water to be treated. If the amount of supplied salt water is not accurately controlled, the chlorine concentration of the electrolyte solution will fluctuate, resulting in an unstable conversion efficiency to hypochlorous acid. Similarly, even if the flow rate of the electrolyte solution supplied to the electrolytic cell fluctuates, the flow rate of the electrolyte solution passing between the electrodes does not become constant, which causes a problem that the conversion efficiency to hypochlorous acid becomes unstable. Had. An object of the present invention is to solve the above problems and to provide a novel water treatment device capable of performing stable sterilization treatment with strong sterilizing power.

[0006]

According to the invention described in claim 1, electricity is supplied to the water to be treated by energizing a water tank for storing the water to be treated and an electrode set composed of at least two electrode plates. In the water treatment device comprising an electrolysis tank sterilized by chemical decomposition, and a water treatment path that introduces the treated water from the water tank to the electrolysis tank and circulates it back to the water tank after sterilization treatment in the electrolytic tank, the treated water The water treatment apparatus is provided with a PH adjusting means for adjusting the PH of the.

Further, the invention of claim 2 is a water tank for storing water to be treated, an electrolysis cell for conducting electrolysis by energizing an electrode set consisting of at least two electrode plates, and chlorine ions in the electrolysis cell. And filled with an electrolyte solution having an action of promoting an electrochemical reaction, by electrolyzing the electrolyte by energizing the electrode set to produce a sterilizing solution having a sterilizing action, and the produced sterilizing solution. In the water treatment device, the water treatment device is provided with a supply path for supplying water to the water tank. The water treatment device is provided with PH adjusting means for adjusting the PH of the water to be treated.

The invention of claim 3 is the same as claim 1 or 2.
In the water treatment device according to [1], the water to be treated in the water tank is
Further having a PH measuring unit for measuring PH, the PH adjusting means,
The water treatment apparatus is characterized in that a PH adjuster is added to the water to be treated after being electrolyzed in the electrolytic cell based on the measured value from the PH measuring unit.

The invention of claim 4 is based on claims 1 to 3.
In the water treatment apparatus according to any one of 1 to 3, the PH adjusting means adjusts the PH value of the water to be treated in the range of 5.8 to 7.0.

Further, the invention of claim 5 is a water tank for storing water to be treated, an electrolysis tank for conducting electrolysis by energizing an electrode set consisting of at least two electrode plates, and chlorine ions in the electrolysis tank. And filled with an electrolyte solution having an action of promoting an electrochemical reaction, by electrolyzing the electrolyte by energizing the electrode set to produce a sterilizing solution having a sterilizing action, and the produced sterilizing solution. A water treatment device having a supply path for supplying water to the water tank, and having a constant voltage power supply for applying a predetermined voltage to the electrode set, and applying a direct current or an alternating current to the electrode set by the constant voltage power supply. Is a water treatment device.

The invention of claim 6 is the water treatment apparatus according to claim 5, in which a tank containing an electrolyte solution containing chlorine ions and having an action of promoting an electrochemical reaction, and an electrolyte in the tank are stored. A water treatment apparatus comprising: a supply unit that supplies a predetermined amount of a solution to the electrolytic cell; and a quantitative unit that adjusts the supply of the electrolyte solution by the supply unit to a constant flow rate.

The invention of claim 7 relates to claims 5 and 6.
In the water treatment apparatus according to the item 1, further includes a current detection unit that detects a current value flowing through the electrode, and has a life determination unit that determines the life of the electrode based on the output of the current detection unit. It is a water treatment device.

Further, the invention of claim 8 includes a water tank for storing the water to be treated, an electrolytic cell containing an electrode set composed of at least two electrode plates, and chlorine ions contained in the electrolytic cell, In a state of being filled with an electrolyte solution having an action of promoting an electrochemical reaction, the electrode set is energized to electrolyze the electrolyte to produce a sterilizing liquid having a sterilizing action, and the produced sterilizing liquid is placed in a water tank. Supply route to supply,
A sensor that measures the residual chlorine concentration of the water to be treated in the water tank, and based on the data from this sensor, while controlling the energization of the electrode set, activate the supply path to determine the residual chlorine concentration of the water in the water tank. In the water treatment device provided with a control means for adjusting the concentration to a predetermined level, the control means controls the residual chlorine concentration in the water tank to a normal 1.2% at night or while the water tank is not used.
It is a water treatment device characterized by being controlled so that the concentration becomes ˜2 times.

The invention according to claim 9 is the water treatment apparatus according to claim 8, wherein the control means keeps the residual chlorine concentration in the water tank during normal operation within a range of 0.4 to 1.0 mg / l. The water treatment apparatus is characterized in that the residual chlorine concentration at night is controlled to be in the range of 1 to 2 mg / l.

According to the first to fourth aspects of the present invention, the pH in the treated water storage tank can always be maintained within the range of the weak acid region,
Since the abundance ratio of molecular hypochlorous acid can be constantly increased, efficient sterilization can be performed with a small amount of chlorine.

According to the fifth aspect of the present invention, the voltage is applied to the electrode set by using the constant voltage power source, so that the concentration of the electrolyte solution supplied into the electrolytic cell is affected by, for example, the influence of the ambient temperature. Even if is changed, the current flowing through the electrode is automatically increased by using the constant voltage power source, so that stable conversion efficiency of hypochlorous acid can be obtained.

According to the invention of claim 6, the flow rate of the electrolyte solution flowing between the electrode sets becomes constant by adjusting the flow rate of the electrolyte solution flowing into the electrolytic cell to a constant flow rate by the quantifying means, so that the flow rate is more stable. According to the invention of claim 7, wherein the conversion efficiency of the hypochlorous acid can be obtained, by using a constant voltage power supply, if the titanium oxide is formed on the anode electrode due to catalyst elution and peeling, the current value is increased. Therefore, the degree of wear of the electrode can be detected by measuring this, and the life of the electrode can be determined based on this detected value. Therefore, it is possible to perform reliable maintenance and maintain stable performance for a long period of time.

According to the eighth and ninth aspects of the present invention, the sterilization of the water to be treated and the decomposition of organic matters can be promoted at night or when the water tank is not used, and the water quality can be maintained excellently. In addition, by effectively using night power, running costs can be significantly reduced.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a simplified view showing a structure in which a water treatment device 1 according to an embodiment of the present invention is incorporated in a large water tank 2 such as a pool or a bath tub. As shown in the figure, in the water tank 2, a main circulation path 20 for constantly circulating a large amount of water to be treated by a circulation pump 22 in a direction indicated by a double solid line arrow in the figure.
Is installed.

Reference numeral 21 is a filter for sand filtration, and 23 is a heat exchanger. The water treatment route 10 of the water treatment device 1 is branched from a branch point J1 of the main circulation route 20 between the filter 21 and the heat exchanger 23, as shown by the solid line arrow in the figure, and a plurality of electrodes are provided. After passing through a gas-liquid separation tank 13 which also incorporates an electrode set E1 made of a plate and a filter 12 for removing fine bubbles, and which also functions as an electrolytic cell, at the confluence point J2 on the downstream side of the branch point J1, the main circulation is performed again. It is connected to join the path 20. Junction point J of the water treatment route 10
On the way from 1 to the gas-liquid separation tank 13, the on-off valve B
1, a regulating valve B2 for regulating the flow rate, a flow meter S1, and a solenoid valve B4 are arranged.

Of the above, adjusting valve B2 and adjusting valve B4
An adjusting valve B10 for adjusting the flow rate at a position between
A branch path 11 is connected to a drain port 11a via a residual chlorine sensor 26 for measuring the residual chlorine concentration. Then, the drain port 11a of this branch path 11 is connected to the space above the water surface of the gas-liquid separation tank 13 described later,
The water discharged from the drain port 11a is released to the atmosphere and then drained into the gas-liquid separation tank 13.

On the way from the gas-liquid separation tank 13 to the confluence J2 of the water treatment path 10, the treated water is sent out from the gas-liquid separation tank 13 in order, so that the treated water is treated in the water treatment path 10. A delivery pump P1, a flow meter S4, a regulating valve B7, a check valve B8 for preventing backflow, and a regulating valve B9 for regulating the flow rate are arranged.

A supply conduit 32 of PH adjusting means 35 for adjusting the pH of the water to be treated is connected to J3 on the downstream side of the confluence J2 of the main circulation path 20. The pH adjusting means includes, for example, an adjusting tank 30 in which a drug such as sodium bisulfate is stored, and an adjusting tank 31 in which a drug such as sodium carbonate is stored.
0 and 31 are connected to the medicine injection device 33 via electromagnetic valves B11 and B12. The medicine injection device is composed of, for example, a pump and is connected to the main circulation path 20 via the supply pipe 32 having a check valve B13 in the middle thereof.

The water tank 2 is provided with a PH measuring section 34 for constantly monitoring the PH of the water to be treated, and the medicine feeding device 3 is controlled by the control means based on the measured value from the PH measuring section 34.
3. The operations of the solenoid valves B12 and B11 are controlled.

In order to adjust the pH of the water to be treated using the PH adjusting means 35, the control means is, for example, the water tank 2.
If the pH of the water to be treated in the inside exceeds 7.0, the chemical injection device 33 is operated and the chemical valve (heavy weight) for lowering the PH stored in the adjustment tank 30 by opening the electromagnetic valve B11. An appropriate amount of sodium sulfate or the like) is supplied to the water tank through the main circulation path 20. On the other hand, the pH of the water to be treated in the water tank
Is less than 5.8, an appropriate amount of a chemical (sodium carbonate or the like) for opening the solenoid valve B12 and increasing the PH stored in the adjustment tank 31 is supplied.

As a result, the pH adjusting agent is introduced into the main circulation path 20 and dissolved in the water to be treated in the water tank 2,
The pH value is controlled to be suitable for sterilization of the water to be treated with hypochlorous acid. Although sodium bisulfate and sodium carbonate are exemplified as the pH adjuster, for example, those easily available from the group of organic acids such as citric acid, acetic acid and phosphoric acid may be used.

The gas-liquid separation tank 13 is composed of a box-shaped tank body 13 that is the main body of the gas-liquid separation tank 13 and a lid 13e that closes the upper opening 13c of the tank body 13 and constitutes the upper surface of the gas-liquid separation tank 13. The inside of the tank main body 13 is divided into two gas-liquid separation regions 13a and 13b by the filter 12 for removing the fine bubbles.

Then, these two gas-liquid separation regions 13a, 1
In the gas-liquid separation region 13a on the most upstream side of 3b, the electrode set E1 including a plurality of electrode plates described above is arranged,
The gas-liquid separation tank 13 also serves as an electrolytic tank for electrochemical reaction. Further, an outlet 13d for the water to be treated is formed at the bottom of the gas-liquid separation region 13b on the most downstream side,
The delivery pump P1 described above is arranged on the pipe forming the latter half of the water treatment route 10 from the delivery port 13d.

At the position directly above the gas-liquid separation region 13b in the lid 13e, a suction for forcibly discharging the gas originating from the fine bubbles separated from the water to be treated by the filter 12 out of the tank. An exhaust pipe 34 having a mold blower F1 disposed in the middle is connected, and on the other hand, at a position directly above the gas-liquid separation region 13a, the blower F1 replaces the gas discharged to the outside of the tank into the tank. An air inlet (not shown) for introducing air is formed, and a pipe forming the first half of the water treatment route 10 is connected.

Further, in the lid 13e, the gas-liquid separation area 1
At an upper position of 3a, a water level sensor W1 as a water level detecting means for controlling the water level in the gas-liquid separation area 13a within a certain range.
However, the detector is arranged so as to be inserted into the gas-liquid separation area 13a, and a water level sensor W2 for detecting the water level of the gas-liquid separation area 13b is provided above the gas-liquid separation area 13b. It is provided.

The water level sensor W1 detects the water level of the water to be treated in the gas-liquid separation region 13a on the most upstream side, and opens / closes the valve B1.
By opening and closing, and adjusting the flow rate by adjusting valve B2,
The outflow rate to the water treatment path is adjusted by adjusting the inflow rate of the water to be treated into the gas-liquid separation tank 13 or by adjusting the flow rate of the pump P1 for delivery.
The water level of the water to be treated 3a is controlled to a predetermined water level.

The water level sensor W2 is used in the gas-liquid separation area 1
The water level of 3b is detected, and the clogging of the gas-liquid separation filter 12 is determined from the water level difference with the water level sensor W1.

FIG. 2 is a block diagram showing the electrical construction of the water treatment device shown in FIG. The water treatment device is provided with a control unit including a microcomputer. The outputs of the residual chlorine sensor 26, the PH sensor 34, and the water level sensors W1 and W2 are given to the control unit. A memory and a timer are provided in the control unit.

The control section 40 controls the operation of the water treatment device 1 in accordance with a predetermined operation program in accordance with the given detection signals. Specifically, a control signal is applied to the driver 43, and the driver 43 controls energization such as energization output (energization current) and energization time to the electrode set E1 based on the applied signal, and each valve B1 The opening / closing and adjustment of B13 to B13, the drive control of the pumps P1 and 22, the blower motor F1, and the energization control of the medicine feeding device 23 are performed.

Using the water treatment device 1 having the above-mentioned parts,
In order to sterilize the water to be treated in the water tank 2, first, the circulation pump 22 is operated so that a large amount of the water to be treated is constantly supplied in the main circulation path 20 as indicated by a double solid arrow in FIG. While circulating, the delivery pump P1 is operated and the valves B1 to B10 are opened.

Then, a part of the water to be treated circulating in the main circulation passage 20 flows into the water treatment passage 10,
First, the flow rate is adjusted through the adjusting valve B2, and then the flow rate is measured by the flow meter S1 and the residual chlorine concentration is measured by the residual chlorine sensor 26. The adjustment of the flow rate by the adjusting valve B2 is adjusted according to the flow rate measured by the flow meter S1.

Next, the water to be treated is sent to the gas-liquid separation region 13a on the most upstream side of the gas-liquid separation tank 13 and the region 13a concerned.
The electrode set E1 is energized based on the measurement result of the residual chlorine concentration measured by the residual chlorine sensor 26, so that it is sterilized by an electrochemical reaction and then passes through the filter 12 to pass the gas on the downstream side. While being successively sent to the liquid separation region 13b, fine bubbles are removed by the filter 12 to make the appearance clear and clear. Further, at this time, the gas derived from the fine bubbles removed from the water to be treated rides on the flow of air flowing from the air introduction port (not shown) to the suction port, which is generated by operating the blower F1. Removed from the gas-liquid separation tank 13,
It is discharged to the outside of the tank through the exhaust pipe 34.

On the other hand, the water to be treated which has undergone the sterilization treatment and in which the fine bubbles have been removed is operated by the delivery pump P1.
From the gas-liquid separation region 13b on the most downstream side, it is sent out of the tank through a delivery port 13d provided at the bottom of the region, and passes through a flow meter S4, a regulating valve B7, a check valve B8, and a regulating valve B9, and joins. It is returned to the main circulation path 20 at J2 and is returned to the water tank 2.

During operation of the water treatment apparatus, the pH measuring unit 34 constantly or periodically P the water to be treated in the water tank 2.
H is measured and the tank 30 is adjusted according to the pH of the water to be treated.
Alternatively, the medicine in 31 is injected into the main circulation path 20 by the action of the injection device 33.

FIG. 3 is a flow chart showing the contents of control performed by the control unit.

When the administrator turns on the power of the water treatment device,
The control unit activates the circulation pump P1 and stops the stop valve B.
1, open B7, adjust the other valves B2-B13,
The water W to be treated is taken from the main circulation passage 20 into the water treatment passage 10 and starts circulation to return to the main circulation passage via the gas-liquid separation tank. Next, the pH measuring unit takes in the pH of the water to be treated in the water tank 2 (step S1).

The fetched PH value Z is compared with the upper limit reference value (PH7) registered in the memory (step S
2) If Z> PH7 or more, the solenoid valve B11 is opened and the charging device 33 is driven to drive the storage tank 3
The chemical in 0 (sodium bisulfate) is caused to flow into the main circulation path 20 and is caused to work so that the pH of the water to be treated becomes PH7 or less (steps S3 and S4). On the other hand, when the captured PH value Z is not Z> PH7 or more, the lower limit reference value (PH
5.8) (step S5) and when Z <PH 5.8 or less, the solenoid valve B12 is opened and the charging device 33 is driven to mainly remove the chemical agent (sodium carbonate) in the storage tank 31. It is introduced into the circulation path 20 and worked so that the PH value of the water to be treated becomes equal to or higher than PH 5.8 (steps S6 and S7).

As a result of the above-described control, the pH of the water to be treated in the water tank can always be kept within the range of 5.8 to 7.0, and the abundance ratio of molecular hypochlorous acid can be controlled. Almost 8
Since it can be maintained at 0% or more, efficient sterilization can be performed with a small amount of chlorine.

FIG. 4 is a diagram showing the structure of a water treatment device 2 according to another embodiment of the present invention. The main difference of the water treatment device 1 from the previous example is that the water treatment route 10 including the gas-liquid separation tank 13 is replaced by a batch treatment electrolytic tank 14. Hereinafter, the same parts as those in the previous example will be described by giving the same numbers.

The batch processing electrolytic cell 14 has a built-in electrode set E2 composed of a plurality of electrode plates. The batch processing electrolytic cell 14 contains chloride ions such as salt and undergoes an electrochemical reaction. A sterilizing solution having a sterilizing action is produced by energizing the electrode assembly E2 to electrolyze the electrolyte solution for a certain period of time in a state of being filled with an aqueous solution of an electrolyte having a accelerating action, and the produced sterilizing solution is stored in a storage tank. It is designed to be stored in 14d. And the storage tank 14d
A supply path 35 for connecting the sterilizing liquid therein to the main circulation path 20 at any time is connected.

More specifically, the branching point J1 branches off from the main circulation path 20 to open and close the valve B1 and the branching point J8 to the treated water supply path.
After passing through the adjusting valve B11, the solenoid valve B12, the confluence J9 of the supply path of the electrolyte solution containing chlorine ions, the electrolytic bath 14 for batch processing, and the pump P9 for delivery, the check valve B
The supply path 35 is formed so as to join the main circulation path 20 again through the adjustment valve B14.

Further, the solenoid valve B1 in the supply path 35
Branch point J located between 2 and the electrolytic bath 14 for batch processing
A supply path 51 from a salt water tank 50 described later is connected to 9 via a metering pump P6.

The salt water tank adjusts and stores high-concentration salt water, for example, saturated salt water. In this case, a large amount of salt is supplied to the salt water tank, and at the branch point J8 located upstream of the solenoid valve B11.
In the above, the untreated water feed path 52 branched from the supply path 35 is connected, and the solenoid valve B is connected via the adjusting valve B15.
By 16 and the water level sensor W3, the water to be treated is supplied at any time so that the water level in the salt water tank will always be a constant water level.

Of the above, the on-off valve B1 and the adjusting valve B1
In the position between 1 and 1, there is a regulating valve B17 for regulating the flow rate.
And a residual chlorine sensor 26 for measuring the residual chlorine concentration
A branch path 10b is connected to the drain port 10a via the and.

The batch processing electrolytic cell 14 comprises a box-shaped case main body 14a, which is the main body of the batch processing electrolytic cell 14, and a lid 14b which constitutes the upper surface of the batch processing electrolytic cell 14 by closing the upper opening of the case main body 14a. It is configured. A rectangular resin box serving as the electrolytic cell 14c is provided in a separate compartment in the case main body, and the space other than the electrolytic cell 14c in the case main body stores the sterilizing liquid produced in the electrolytic cell 14c. It is also used as the storage tank 14d.

In the electrolytic cell 14c, an electrode set E2 composed of a plurality of electrode plates is arranged in a diaphragm-free state, and a constant voltage power source G is connected to each electrode set, and a constant voltage is applied to each electrode. Function to apply a DC voltage or an AC voltage. Further, in the electrolytic cell 14C, a supply path 35 for supplying an electrolytic solution generated by the concentrated liquid from the salt water tank 50 and the water to be treated from the water treatment path 10 into the electrolytic cell 14c.
The pipe of the first half part of (1) penetrates the lid 14b and is inserted into the electrolytic cell 14c.

On the most downstream side of the case body 14a which also serves as the storage tank 14d, a pipe in the latter half of the sterilizing liquid supply path 35 is arranged with its suction port 35a located at the bottom of the storage tank 14d. , Pump P for delivery on the way
9 is connected.

The lid 14b located immediately above the most downstream side of the body case 14a has a suction blower for forcibly discharging the gas generated by electrolysis in the electrolytic cell 14c to the outside of the body case 14a. Exhaust pipe 3 with F2 in the middle
3 is connected.

Further, a water level sensor W4 as a water level detecting means for controlling the water level of the sterilizing liquid in the storage tank 14d within a certain range is arranged at a substantially central position of the lid 14b.

When the metering pump P6 and the solenoid valve B12 are driven, the saturated saline solution in the salt water tank is mixed with the water to be treated which has passed through the solenoid valve 12 to adjust it to a dilute saline solution having a predetermined concentration. The diluted saline solution is supplied to the electrolytic cell 14c as an electrolytic solution.

Then, in the electrolytic cell 14c, the supplied electrolyte solution is electrolyzed to produce a sterilizing solution containing hypochlorous acid or hypochlorite ion. The produced sterilizing liquid fills the electrolytic cell 14c and overflows from the upper part of the electrolytic cell 14c, and the storage tank 1 disposed around the electrolytic cell 14c.
It is stored in 4d.

The water level sensor W4 is provided in the storage tank 14d.
By detecting the water level of the sterilizing liquid of No. 1 and adjusting the driving of the metering pump P6 and the opening / closing of the electromagnetic valve B12, the electrolytic cell 14c
The amount of the sterilizing solution in the storage tank 14d is adjusted by controlling the inflow amount of the electrolytic solution flowing into the storage tank 14d, thereby controlling the sterilizing solution overflowing from the electrolytic cell 14c. The water level is controlled to a predetermined level.

FIG. 5 is a block diagram showing the electrical construction of the water treatment device 2. As shown in the figure, the water treatment device 2 controls the operation of the constant voltage power supply to control the energization of the electrode set E2, while operating the respective parts constituting the water treatment route 10 and the supply route 35 as a control unit. Is equipped with.

Water level sensors W4 and W3, residual chlorine sensor 2
The output of 6 is given to the control unit. The control unit is provided with a timer for defining the operating time period and the operation stop time period of the device, and a memory for registering initial values such as the amount of water stored in the pool and the reference chlorine concentration, for example.

The control unit controls the sensors 26, W3 and W4.
Output, the time zone defined by the timer, and the initial value registered in the memory, the following calculation is performed, and the control signal is given to the driver based on the calculation. The driver then, based on the signal provided,
Energization output to the electrode set E2, energization control such as energization time, etc. are performed, and opening / closing and adjustment of each valve B1 to B17 and drive control of each pump P6, P9, 22 are performed.

In order to generate electrolyzed water using the electrolyzer, in order to stabilize the conversion efficiency of the electrolyte solution to hypochlorous acid to a constant value, the current value flowing between the electrodes in the electrolyzer is adjusted. Must be set to the optimum value. In this embodiment, since the electric power supplied to the electrode set is composed of the constant voltage power source,
For example, even if the ambient temperature rises and the chlorine concentration of the electrolyte solution supplied to the electrolytic cell increases, the constant voltage power supply is used, so the impedance between the electrodes increases as the conductivity of the electrolyte solution increases. By decreasing, the current supplied to the electrode increases, and the conversion efficiency is automatically kept constant.

In order to stabilize the conversion efficiency of the electrolyte solution into hypochlorous acid, it is necessary to keep the amount of electrolyte passing between the electrodes constant. Therefore, the electrolyte solution supplied to the electrolytic bath 14 for batch processing is supplied in a fixed amount through a metering unit such as a metering pump or a metering valve so that the flow rate passing between the electrodes does not change. Similar to the above, stable conversion efficiency can be obtained.

FIG. 6 is a flow chart showing the contents of control performed by the control unit. The control operation of the control unit will be described according to the flow of this flowchart.

When the administrator turns on the power of the water treatment device 2, the controller operates the circulation pump 22 to circulate the water to be treated in the main circulation passage. Next, it is determined whether the storage tank 14d is full. If not full, valves B1 and B1
1, B12 is opened to start water supply to the batch processing electrolytic tank 14, and the pump P6 is driven to supply the electrolyte from the salt water tank to the batch processing electrolytic tank 14 to produce an electrolyte solution of a predetermined concentration ( Step S11).

Next, the energization of the electrode set E2 is started, and the electrolysis of the electrolyte solution is continued until the energization time reaches a certain time, and then the energization of the electrode set E2 is stopped. As a result, a high-concentration sterilizing solution is produced in the electrolytic cell (step S12).

After that, the control unit controls the residual chlorine sensor 26.
The residual chlorine concentration X (mg / l) measured by is taken in (step S13).

Next, it is determined whether the present time is the operation time zone or the operation stop time zone (step S14), and if it is the operation stop time zone, the residual chlorine concentration X is 1.2 mg / reference value stored in the memory. It is determined whether or not l or less (step S15).
If the residual chlorine concentration in the water to be treated is 1.2 mg / l or less, operate the pump and open valves B18 and B14 to supply a fixed amount of the sterilizing solution in the electrolytic cell to the main circulation path. The sterilizing liquid is returned to the water tank 2 through the circulation path 20 (step S17).

On the other hand, when the residual chlorine concentration is 1.2 mg / l or more in step S15 (NO in step S15), the process proceeds to step S16, and the residual chlorine concentration X is 1.5 mg as the reference value.
It is determined whether / l or less. If it is determined in step S16 that the residual chlorine concentration X is 1.5 mg / l or less,
The sterilizing liquid is supplied to the main circulation path as described above (step S
17). In step S16, the residual chlorine concentration X is 1.5 mg / l
When it is determined that the above is the case (YES in step S16), the process directly returns to step S14.

On the other hand, if the current operating time zone is determined in step S14, the process proceeds to step S18, and the residual chlorine concentration X is set to another reference value 0.4 mg stored in the memory.
It is determined whether / l or less. Residual chlorine concentration X is 0.
If it is 4 mg / l or less, the sterilizing solution is supplied to the main circulation path (step S20). In addition, 0.4 mg / l or more (Step S
If NO in step 18, the process proceeds to step S19 to determine whether the residual chlorine concentration X is 1.0 mg / l or more, and 1.0 mg / l
In the following cases, sterilizing liquid is supplied (step S20), and 1.0
When mg / l or more (YES in step S19), step S
Return to 14.

In the above-mentioned embodiment, the operating hours of the apparatus such as pool and bath hours are controlled so that the residual chlorine concentration of the water to be treated in the water tank is in the range of 0.4 to 1.0 mg / l. Residual chlorine concentration is 1.
An example of controlling the concentration to be in the range of 2 to 1.5 mg / l has been shown, but the present invention is not limited to this, and it is possible to operate by setting the residual chlorine concentration during the operation stop time to 1.2 to 2 times that of normal operation. Even if the residual chlorine concentration is in the range of 1 to 2 mg / l, preferably 1 to 1.5 mg / l, the same effect can be obtained.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

[Brief description of drawings]

FIG. 1 is a simplified view of a water treatment device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the water treatment device.

FIG. 3 is a flowchart showing control of PH adjustment of the water treatment device.

FIG. 4 is a schematic view showing a water treatment device according to another embodiment of the present invention.

5 is a block diagram showing an electrical configuration of the water treatment device of FIG.

FIG. 6 is a flow chart showing control of residual chlorine concentration in the water treatment device of FIG.

FIG. 7: Distribution of residual chlorine concentration by PH region

[Explanation of symbols]

1 Water treatment device 2 aquarium E1 electrode assembly 35 PH adjusting means

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) C02F 1/50 550 C02F 1/50 550D 550L 560 560F 560Z 1/76 1/76 A (72) Inventor Noro Takuya Osaka Prefecture 2-5-5 Keihanhondori, Moriguchi-shi Sanyo Electric Co., Ltd. F term (reference) 4D050 AA10 AB06 BB04 BC10 BD04 BD06 BD08 CA10 CA13 CA15 4D061 DA07 DB10 EA02 EB01 EB04 EB12 EB37 EB39 FA11 FA13 GA07 GA12 GC06 GC14 GC18

Claims (9)

[Claims] 1. A water tank for storing water to be treated, an electrolysis tank for energizing an electrode set consisting of at least two electrode plates to sterilize the water to be treated by electrochemical decomposition, and electrolyzing the water to be treated from the water tank. In a water treatment device having a water treatment route introduced into a tank and returning to a water tank after sterilization in an electrolytic tank, water characterized by comprising a PH adjusting means for adjusting the PH of the water to be treated. Processing equipment. 2. A water tank for storing water to be treated, and at least 2.
An electrolyzer that conducts electrolysis by energizing an electrode set consisting of a single electrode plate, and the above electrode set in a state of being filled with an electrolytic solution containing chlorine ions and having an action of promoting an electrochemical reaction. By electrolyzing the electrolyte by electrolyzing the electrolyte to produce a sterilizing solution having a sterilizing action, in a water treatment device having a supply path for supplying the produced sterilizing solution to the water tank, the pH of the water to be treated is A water treatment device comprising a PH adjusting means for adjusting the water. 3. The water treatment apparatus according to claim 1 or 2, further comprising a PH measuring section for measuring the PH of the water to be treated in the water tank, wherein the PH adjusting means is provided from the PH measuring section. A water treatment apparatus, characterized in that a PH adjuster is added to water to be treated after being electrolyzed in the electrolytic cell based on a measured value. 4. The water treatment apparatus according to any one of claims 1 to 3, wherein the PH adjusting means adjusts the PH value of the water to be treated to 5.
A water treatment device characterized by being adjusted to a range of 8 to 7.0. 5. A water tank for storing water to be treated, and at least 2.
An electrolyzer that conducts electrolysis by energizing an electrode set consisting of a single electrode plate, and a state in which the electrolytic bath contains chlorine ions and has an action of promoting an electrochemical reaction is filled with the electrode set. By electrolyzing the electrolyte by energizing the electrolyte to produce a sterilizing solution having a sterilizing action, in a water treatment device provided with a supply path for supplying the produced sterilizing solution to the water tank, a predetermined amount is provided for the electrode set. A water treatment device having a constant voltage power source for applying a voltage, wherein direct current or alternating current is applied to the electrode set by the constant voltage power source. 6. The water treatment apparatus according to claim 5, wherein a tank containing an electrolytic solution containing chlorine ions and having an action of promoting an electrochemical reaction, and an electrolytic solution in the tank are provided in the electrolytic cell. A water treatment apparatus comprising: a supply unit for supplying a fixed amount; and a supply unit for adjusting the supply of the electrolyte solution by the supplying unit to a constant flow rate. 7. The water treatment apparatus according to claim 5 or 6, further comprising current detection means for detecting a value of a current flowing through the electrode, and determining the life of the electrode based on the output of the current detection means. A water treatment apparatus having a life determining unit. 8. A water tank for storing water to be treated, and at least 2.
An electrolysis cell containing an electrode set consisting of a single electrode plate, and the electrolysis cell is filled with an electrolyte solution containing chlorine ions and having an action of promoting an electrochemical reaction, and the electrode set is energized. By electrolytically treating the electrolyte to produce a sterilizing solution having a sterilizing action, a supply path for supplying the produced sterilizing solution to the water tank, and a sensor for measuring the residual chlorine concentration of the water to be treated in the water tank, Based on data from this sensor, while controlling the energization of the electrode set, while operating the supply path, a water treatment apparatus comprising a control means for adjusting the residual chlorine concentration of water in the water tank to a predetermined concentration, The control means controls the residual chlorine concentration in the water tank to be 1.2 to 2 times the normal concentration at night or while the water tank is not being used. 9. The water treatment apparatus according to claim 8, wherein the control means controls the residual chlorine concentration in the water tank during normal operation to 0.4.
A water treatment device, which is controlled to be in the range of 1.0 mg / l and the residual chlorine concentration at night is controlled to be in the range of 1 to 2 mg / l.