JP3398104B2 - Water treatment equipment - Google Patents

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, a bath in an inn or a public bath, and so on, have a so-called bleaching powder to maintain the quality of the water. However, it is necessary to sterilize it by adding an aqueous solution of high-grade coconut powder) or sodium hypochlorite (NaClO). However, in the past, this work was
Workers at pools and baths are doing it by hand, and since the aqueous solution of bleach and sodium hypochlorite is irritating, pay particular attention when putting it in during business hours. There is a problem in that it requires a great deal of effort to perform the processing because it must be done.

[0003] In particular, since the khaki is a solid powder,
It took a long time for the solution to dissolve and become uniform in concentration after being charged, and there was also a problem that the pool or bath could not be used during that time. In addition, a water tank placed on the roof of the building,
Or, in the case of bathtubs for general households, the current situation is that they rely only on the sterilizing power of chlorine ions contained in tap water, and especially in the case of water tanks, the quality of water is increased due to the growth of algae inside. Deterioration is one social problem.

Further, in the case of a bathtub for general household use, it is usually considered that there is no problem in terms of water quality because the water is replaced approximately every 1 to 2 days. However, in the boiler connected to the bathtub, Since it cannot be cleaned frequently, bacteria and fungi easily proliferate, and there is a concern that the water quality will deteriorate. 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.

[0005]

The invention according to claim 1 is connected to a water tank for storing water to be treated,
Water to be treated is introduced from the water tank, sterilized by an electrochemical reaction, and then a water treatment path for refluxing to the water tank is provided, and two sets of electrodes, which are used in the electrochemical reaction and are composed of at least two electrode plates, are provided. above, respectively placed on the water treatment path energizable state separately, by the residual chlorine sensor, based on the measurement results of the residual chlorine concentration in the for-treatment water, switches the number of electrode pairs to be energized, the electrode
In order to make the plate wear uniform among multiple electrode pairs,
Memorize the number of energizations of the pole set, and
The water treatment device is characterized in that electricity is preferentially applied .

The invention according to claim 2 stores the water to be treated.
Connected to a water tank, and introduce the water to be treated from the water tank,
Water sterilized by a chemical reaction and then returned to a water tank
It has a processing route and is used for the above electrochemical reaction.
2 or more electrode sets consisting of at least 2 electrode plates
On the water treatment route, each can be individually energized.
The residual chlorine sensor to detect residual chlorine in the water to be treated.
Based on the concentration measurement results, cut the number of electrode pairs that are energized.
And replace the electrode plate evenly across multiple electrode pairs.
So that the electrode set that is energized at regular intervals
It is a water treatment device characterized by switching priorities .

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015] According to the configuration of the 請 Motomeko 1, first from the water bath,
If necessary, sodium chloride (NaCl), calcium chloride (CaC) may be added to the water to be treated introduced through the water treatment route.
12), hydrochloric acid (HCl) and the like are added, and an electrode set consisting of at least two electrode plates is energized.

Then, hypochlorous acid (HClO) and hypochlorite ion (C
lO ^-), or chlorine-containing compounds such as chlorine gas (Cl _2), or a very short time in the reaction process, occurs to active oxygen (O ₂ ^-) after the treatment water is sterilized, such as by,
It is returned to the water tank through the water treatment route again. (Anode side) 4H ₂ O-4e ⁻ → 4H ⁺ + O ₂ ↑ + 2H ₂ O 2Cl ⁻ → Cl ₂ + 2e ⁻ H ₂ O + Cl ₂ ⇔ HClO + H ⁺ + Cl ⁻ (Cathode side) 4H ₂ O + 4e ⁻ → 2H ₂ ↑ + 4OH ⁻ ( Anode side + cathode side) H ⁺ + OH ⁻ → H ₂ O For example, the operator manually operates a pump for circulating water through the water treatment path and energizes the electrode set. Is performed with almost no human intervention and without the operator directly touching the water to be treated.
Further, the water treatment can be completely automated by automatically operating the pump and energizing the electrode set by using a timer or a residual chlorine sensor described later.

Therefore, according to the structure of claim 1, the water to be treated stored in the water tank can be sterilized easily and efficiently. Moreover, after the sterilization treatment, the water to be recirculated to the water tank contains only extremely low concentration of ions as compared with the conventional treatment agents such as solid powder calcination or an aqueous solution of sodium hypochlorite. The above treatment can be performed regularly even during business hours such as at a pool or a bath, or arbitrarily according to the water quality of the water to be treated, which changes depending on the number of visitors, weather, temperature, and the like.

Therefore, in a pool or a bathtub of a bathhouse, it is possible to completely omit the work of sterilizing by adding chlorinated material, or to significantly reduce the number of times, and to remarkably reduce the burden on the operator. In addition, good water quality can be maintained. In addition, in a water tank or the like arranged on the rooftop of a building, for example, if the above series of work is performed manually or automatically every fixed amount of water used, or at fixed intervals regardless of the amount of water used. It is possible to prevent the algae from growing, which is a problem, and prevent the deterioration of water quality.

Further, in a bathtub for general household use,
For example, at the end of a day's bathing or before draining the bath water, if the above-mentioned series of work is performed manually or automatically, bacteria and mold in the boiler connected to the bathtub, etc. It is possible to prevent the reproduction of water and prevent the deterioration of water quality. Further, in the structure of claim 1, two or more electrode sets, which are used for the electrochemical reaction and are composed of at least two electrode plates, are arranged on the water treatment route in such a manner that they can be individually energized to remove residual chlorine. The number of energized electrode sets is switched based on the measurement result of the residual chlorine concentration in the water to be treated by the sensor.

Therefore, as described above, the processing capacity of the apparatus can be arbitrarily adjusted according to the water quality of the water to be treated, which changes depending on the number of visitors, the weather, the temperature, etc., for example, during business hours such as a pool. Even if the number of visitors increases rapidly, the water quality can be kept almost constant, and the power consumption when the number of visitors is small and the consumption of the electrode plate can be suppressed. it can. Also, sequentially, by changing the priority of energization of the multiple electrode set,
Depletion of electrode plates by deposition of scale (mainly calcium, magnesium and their oxides, hydroxides, etc.) on the cathode surface and erosion of the anode surface by hypochlorous acid and active oxygen Since it is possible to make uniform between the sets, it is possible to prevent the electrode plates of a specific electrode set from being consumed specifically and becoming unusable, and to extend the life of the entire system.

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

[0036]

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, a large amount of water W to be treated is constantly provided in the figure by a circulation pump 23 in which a filter 21 for sand filtration and a heat exchanger 22 for heating the water to be treated are incorporated in the water tank 2. A main circulation path 20 for circulating in the direction indicated by the one-dot chain line arrow is installed in the water treatment apparatus 1. The water treatment path 10 of the water treatment apparatus 1 is a branch point J1 of the main circulation path 20 on the downstream side of the filter 21. After passing through the electrolytic cell 12 in which the electrode set 11 composed of a plurality of electrode plates 110 is built in, the flow path is branched into the main circulation path 20 again at the confluence J2 on the downstream side of the heat exchanger 22. It is connected to the.

On the way from the branch point J1 of the water treatment route 10 to the electrolytic cell 12, a stop valve B1, a pressure reducing valve B2 for reducing the pressure, a circulation pump P1 for circulating the water to be treated, and a flow rate adjusting in order. The adjusting valve B7, the conductivity sensor S1 for measuring the total concentration of ions in the water to be treated, the filter 13 for filtering the water to be treated, the ion exchange resin 14, and the stop valve B3 are arranged. In addition, of the above, adjustment valve B
7 is connected to a position between the conductivity sensor S1 and a branch path 10b reaching the drain port 10a via a regulating valve B4 for regulating the flow rate and a residual chlorine sensor S2 for measuring the residual chlorine concentration. Has been done.

Due to its structure, the residual chlorine sensor S2 is arranged as described above because it is necessary to continuously keep a very small amount of water to be treated, which is smaller than the amount of water flowing through the water treatment route 10. A stop valve B5, a circulation pump P2 for circulating the water to be treated, and a check valve B6 for preventing backflow are arranged in this order on the water treatment path 10 from the electrolytic cell 12 to the confluence J2. Also, electrolytic cell 12 and stop valve B5
And a pressure gauge S3 for measuring the water pressure of the water to be treated.
Are connected.

When the water treatment device 1 is provided with a plurality of electrode sets 11 ... As described in claim 1,
Each of the electrode sets 11 is, for example, as shown in FIG. 2, on the main flow path in the electrolytic cell 12 where the flow of the water to be treated does not stay,
That is, in the figure, it is preferable to dispose them on the flow path (indicated by the dashed line arrow) from the inflow port 12a of the water to be treated to the outflow port 12b of the electrolytic cell 12. Each electrode set 11 ...
Is driven by switching the number of energized currents based on the measurement result of the residual chlorine concentration in the water to be treated by the residual chlorine sensor S2.

For example, in the case of a pool, when the number of visitors is large, the number of visitors is rapidly increasing, the weather is fine, rain is conversely, or the temperature is high, the residual chlorine concentration in the water to be treated is high. In order to show a tendency to decrease rapidly, a larger number of two or more of each electrode set 11 ... Is energized according to the concentration value to rapidly change the residual chlorine concentration to a predetermined threshold value. Try to recover. At this time, the energization interval may be shortened or the energization time for one time may be lengthened.

On the other hand, when the number of visitors is small, when the weather is cloudy, or when the temperature is low, the degree of decrease in the residual chlorine concentration is mild, so that the electrode set 1 that is energized is energized.
The number of 1 ...
It suffices to shorten the one-time energization time. When the number of times of energization of each electrode set 11 is stored as described in claim 1 and the one with the smaller number of driving is preferentially energized, the consumption of the electrode plate 110 is reduced to a plurality of electrode sets 11.・ It can be made uniform. At this time, it is preferable to continuously store the number of energizations from the start of the operation of the water treatment device 1 regardless of whether the device is in operation or at rest, in order to accurately grasp the consumption.

Further, as described in claim 2 , the priority of the electrode set 11 to be energized may be switched at regular intervals. For example, the four electrode sets 11 ...
・ Assuming that A, B, C, and D are in order from the left and the switching criterion is 1 business day, the priority on the first day is ABCC-
D, B-C-D-A on the 2nd day, C-D-A-B on the 3rd day
.., the consumption of the electrode plate 110 can be made uniform among the plurality of electrode sets 11.

Each electrode set 11 has three electrodes as shown in FIG.
It is configured by arranging a plurality of plate-shaped electrode plates 110 ... In parallel with each other. And at that time, claim 5
As described in 1. and as shown in FIG.
If the wiring for energization is connected to only the two electrode plates 110a at both ends, the wiring structure can be simplified, and the number of portions to be pulled out from the electrolytic cell 12 for wiring can be reduced. Therefore, the watertightness of the electrolytic cell 12 is improved,
It is possible to obtain the water treatment device 1 which is unlikely to leak water.

In the figure, the two electrode plates 110 at both ends are shown.
a, 110a, two bipolar electrode plates 110b, 110b which are not wired are arranged at equal intervals, and 36V is provided between the two electrode plates 110a, 110a at both ends.
Application of the DC voltage of the two electrode plates 110b,
110b is polarized on both the front and back surfaces to generate a potential difference of 12 V between adjacent electrode plates, whereby the sterilization treatment of the water to be treated by the electrochemical reaction is performed.

However, the actual electrode set 11 is composed of a larger number of electrode plates 110 in order to enhance the efficiency of the sterilization process. In that case, if wiring is performed only on the two electrode plates at the outermost ends, a sufficient potential difference is generated between the adjacent electrode plates to sterilize the water to be treated due to the electrochemical reaction. It is necessary to set the applied voltage between them to be quite high. However, since the maximum value of the voltage applied between the electrode plates forming the electrode set is preferably 45 V or less as described in claim 9, while maintaining this voltage range, each of the adjacent electrodes is maintained. In order to generate a sufficient potential difference between the plates, for example, as shown in FIG. 3B, the electrode plate 110a to be wired is provided not only at both ends but also in the middle thereof.
Is preferably arranged regularly (every three sheets in the figure), and a predetermined voltage of 45 V or less is applied between the nearest electrode plates 110a. This arrangement corresponds to a combination of a plurality of units with the arrangement of FIG. (A) as one unit while reversing the polarities.

Further, as described in claim 6 and as shown in FIGS. 4 (a) and 4 (b), the two electrode plates 110a, 110a at both ends of the plurality of electrode plates 110 are placed inside the electrolytic cell 12. If they are placed in close contact with the wall surface, it becomes possible to prevent scale buildup more effectively and extend the life of the system.
Further, as shown in FIGS. 3 (a) (b) and 4 (a) (b), the respective electrode plates 110 are arranged in the electrolytic cell 12 in parallel with each other in a substantially vertical direction. When the inflow port 12a of the water to be treated is arranged below the electrolytic bath 12 and the outflow port 12b is arranged above the oxygen, oxygen generated on the surface of the electrode plates 110 by an electrochemical reaction is generated as described in claim 10. Gas and hydrogen gas bubbles can be flowed out to the downstream side of the water treatment route 10 without staying in the electrolytic cell 12, thus improving safety.

The configurations of FIGS. 3 and 4 described above are applied when only one set of electrodes 11 is arranged in the electrolytic cell 12 as shown in the respective drawings, and in addition to the above-mentioned plurality of electrodes. Set 1
The present invention can be applied to a device including 1 ..., In which case, each of the electrode sets 11 may be configured as described above. As the electrode plate 110, a thin film of a noble metal such as gold (Au), platinum (Pt), palladium (Pd), or platinum-iridium (Pt-Ir) is plated on the entire surface of a substrate made of titanium (Ti) by a plating method. What is coated by a baking treatment or the like is used.

The interval between the adjacent electrode plates 110 is set in the range of 1 mm or more and 5 mm or less as described in claim 7. The voltage applied to each electrode plate 110 is defined as in claim 8.
It is preferable that the polarity is reversed at regular intervals as described in Section 1, and the time until the reversal is changed according to the hardness of the water to be treated. That is, when the hardness of the water to be treated is high, the scale deposition rate is high, so the time until the reversal is set to be short, and when the hardness is low, it may be lengthened.

As shown in FIG. 1, the electrolytic cell 12 has an inlet 12c for injecting a cleaning liquid on the upper surface thereof and a drain port 12d for discharging the cleaning liquid on the lower surface thereof.
Are arranged so as to sandwich the electrode set 11, respectively.
Then, at the time of maintenance, the stop valves B3 and B5 arranged in front of and behind the electrolysis tank 12 are closed, and in a state where the electrolysis tank 12 is shut off from the water treatment route 10, a cleaning liquid is injected from the injection port 12c to perform electrolysis. The scale attached to the inside of the tank 12 or the surface of the electrode plate 110 is removed.

It is preferable that such an operation is carried out periodically as described in claim 17 or automatically when necessary while observing the adhesion state of the scale. For that purpose, although not shown, electromagnetic valves and the like are respectively connected to the injection port 12c and the drain port 12d as described above, and the cleaning liquid is supplied to the injection port 12c via the electromagnetic valve and the like. It suffices to connect a device (such as a hopper) and operate each of the above parts under the control of a timer or the like.

As the cleaning liquid, for example, inorganic acids such as hydrochloric acid and sulfuric acid, or organic acids such as acetic acid are preferably used. Using the water treatment device 1 including the above-mentioned parts, a water tank 2
In order to sterilize the water to be treated W in the inside, first, the circulation pump 23 is operated as usual to move the inside of the main circulation path 20 into a state shown in FIG.
While a large amount of the water W to be treated is constantly circulated as indicated by the one-dot chain line arrow, the circulation pumps P1 and P2 are operated to introduce a part of the water to be treated W into the water treatment route 10.

Then, the water to be treated introduced into the water treatment passage 10 first passes through the pressure reducing valve B2 and the regulating valve B7 to be adjusted in water pressure and flow rate, and then the total concentration of ions is measured by the conductivity sensor S1. After the residual chlorine concentration is measured by the residual chlorine sensor S2, the residual chlorine concentration is sent to the filter 13 to remove organic substances and the like. The amount of pressure reduction by the pressure reducing valve B2 is adjusted according to the water pressure measured by the pressure gauge S3.
As the filter 13, for example, a non-woven fabric of polypropylene fiber is used.

Next, the water to be treated is sent to the ion exchange resin 14 to remove the ions such as calcium and magnesium, and then sent to the electrolytic cell 12, in which the water is treated.
The electrode set 11 is energized based on the measurement result of the residual chlorine concentration measured by the residual chlorine sensor S2 to be sterilized by an electrochemical reaction and then passed through a check valve B6 for preventing backflow to pass through a heat exchanger. It is returned to the main circulation path 20 at a confluence J2 provided on the downstream side of 22 and is returned to the water tank 2.

When the total ion concentration measured by the conductivity sensor S1 is low, there is a possibility that an efficient electrolysis reaction cannot be performed. So in that case,
As described above, it is preferable to replenish sodium chloride (NaCl), calcium chloride (CaCl ₂ ), hydrochloric acid (HCl) and the like in the water treatment route 10 in the form of an aqueous solution, if necessary. Further, as shown by a chain double-dashed line in the figure, the confluence point J2 of the water treatment path 10 with the main circulation path 20 is provided at a position as close as possible to the terminal end portion 20a of the main circulation path 20. This is preferable in order to reduce the size of P2.

The water treatment apparatus 1 having the above-mentioned parts is actually installed in a facility such as a pool in a unitized state as shown in FIGS. 5 (a) and 5 (b). That is, the filter 13 and the ion exchange resin 1 are provided in the cabinet 1a.
4 and the like, each member such as a filter 1b, an electrolytic cell 12 and a circulation pump P2, and an electrode set 11 in the electrolytic cell 12.
While energizing (not shown), the circulation pump P2,
Power supply device 1 for driving a constant flow pump P3 described later
c and a control device (sequencer) 1d for operating these members in accordance with a predetermined procedure, and a tank 1e for storing the above-mentioned aqueous solution of sodium chloride or the like adjacent to and outside the cabinet 1a. When,
By arranging a constant flow pump P3 for supplying the aqueous solution into the water treatment route 10 from the tank 1e and connecting these members with a pipe 10c forming a part of the water treatment route 10, The processing device 1 is configured.

In the figure, reference numeral 1f is a drain port 10a of the water treatment path 10 and a drain port 12 of the electrolytic cell 12.
This is a pan that receives the drainage from the d and the like, and the drainage received by the pan 1f is discharged to the outside of the apparatus through the total discharge port 1g.
Next, FIG. 6 shows a simplified structure in which the water treatment device 1 according to one embodiment of the present invention is incorporated into a small water tank 3 such as a water tank arranged on the roof of a building or a bathtub for general households. It is a figure.

As shown in the figure, in this example, since the main circulation path 20 described above is not originally provided, the water treatment path 10 of the water treatment apparatus 1 is directly connected to the water tank 3. , The overall configuration is simplified. Of the water treatment route 10,
On the way from the water tank 3 to the electrolytic tank 12, the stop valve B1,
Circulation pump P1 for circulating the treated water, adjusting valve B7 for adjusting the flow rate, conductivity sensor S1 for measuring the total concentration of ions in the treated water, filter 13 for filtering the treated water, ion exchange resin 14 and a stop valve B3 are arranged. The pressure reducing valve B2 for pressure reduction is omitted because it is not necessary.

At the position between the adjusting valve B7 and the conductivity sensor S1 among the above, the adjusting valve B for adjusting the flow rate is provided.
4 and a branch path 10b reaching the drain port 10a via a residual chlorine sensor S2 for measuring the residual chlorine concentration. The configuration and arrangement of the electrode set 11 in the electrolytic cell 12 can be the same as those in the examples described above. That is, although two sets of electrodes 11 are described in the example of the drawing, the number of sets of electrodes 11 may be one or three or more. In addition, each electrode plate 11 that constitutes each electrode set 11
It is preferable that 0 is a bipolar type array, and two electrode plates 110a and 110a at both ends to be wired at that time are arranged.
Is preferably brought into close contact with the inner wall surface of the electrolytic cell 12.

From the electrolytic cell 12 to the water cell 3 of the water treatment route 10.
A circulation pump P2 for circulating the water to be treated and a check valve B6 for preventing backflow are arranged in the order of reaching the water to be treated, and the water to be treated is provided between the electrolytic cell 12 and the circulation pump P2. A pressure gauge S3 for measuring the water pressure is connected. Of these, the check valve B6 connects the end of the water treatment route 10 below the normal water surface of the water W to be treated in the water tank 3 to the inside of the water treatment route 10 in the example of the drawing. It is provided at this position because it is necessary to prevent the backflow of the water W to be treated.

For example, the end of the water treatment route 10 is connected to the water tank 3
In the case of connecting above the normal water surface of the water to be treated W and opening it to the atmosphere, the check valve B6 can be omitted. The procedure for sterilizing the water to be treated W in the water tank 3 using the water treatment device 1 including the above-described units is the same as in the previous example. That is, first, when the circulation pumps P1 and P2 are operated to introduce the water to be treated W in the water tank 3 into the water treatment route 10,
The flow rate of the introduced water to be treated is first adjusted through the adjusting valve B7, and then the total concentration of ions is measured by the conductivity sensor S1 and the residual chlorine concentration is measured by the residual chlorine sensor S2. It is sent to 13 to remove organic substances and the like.

Next, the water to be treated is sent to the ion exchange resin 14 to remove the ions such as calcium and magnesium, and then sent to the electrolytic cell 12, in which the water is treated.
By energizing the electrode set 11 based on the measurement result of the residual chlorine concentration measured by the residual chlorine sensor S2,
After being sterilized by an electrochemical reaction, it is returned to the water tank 3 through a check valve B6 for preventing backflow. 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 shows a water treatment device according to an embodiment of the present invention,
It is a figure which simplifies and shows the structure incorporated in a large-sized water tank, such as a pool and a bathtub of a bathhouse.

FIG. 2 is a lateral cross-sectional view showing an example of an arrangement of electrode plates in an electrolytic cell, which is a main part of the water treatment device.

FIG. 3 (a) shows the arrangement of electrode plates in an electrolytic cell,
A vertical cross-sectional view showing another example, and FIG. 6B is a front view showing still another example of the arrangement of the electrode plates.

FIG. 4 (a) shows the arrangement of electrode plates in an electrolytic cell,
Yet another example, a cross-sectional view taken along line IV-IV of FIG. (B), FIG. (B)
[FIG. 4] is a front view of an electrolytic cell containing the above electrode plate.

5 (a) and 5 (b) are a front view and a side view, respectively, of a unit in which the water treatment device of the present invention is arranged in a cabinet. It is a figure of the state which removed the panel of.

FIG. 6 shows a water treatment device according to an embodiment of the present invention,
It is a figure which simplifies and shows the structure incorporated in a small water tank such as a water tank arranged on the roof of a building or a bathtub for general households.

[Explanation of symbols]

1 Water treatment device 10 Water treatment route 11 electrodes 110 electrode plate A few tanks S2 Residual chlorine sensor W treated water

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kazushi Kawamura 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Minoru Nakanishi 2-5 Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5 In Sanyo Electric Co., Ltd. (72) Inventor Minoru Kishi 2-5-5 Keihan Hondori, Moriguchi City, Osaka Prefecture 5-5 Sanyo Electric Co., Ltd. (72) Inventor Takaaki Yonezawa 2-5 Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5 In Sanyo Electric Co., Ltd. (72) Inventor Yasuhiko Shimizu 2-chome, Keihan Hondori, Moriguchi City, Osaka Prefecture 5-5 Sanyo Electric Co., Ltd. (72) In Yasuto Kondo, 2-chome Keihan Hondori, Moriguchi City, Osaka Prefecture No. 5-5 Sanyo Electric Co., Ltd. (56) Reference JP 6-15276 (JP, A) JP 11-33532 (JP, A) JP 9-70581 (JP, A) JP 7-80459 (JP, A) Japanese Patent Laid-Open No. 3-192 (JP, A) Japanese Patent Laid-Open No. 9-174057 (JP, A) Japanese Patent Laid-Open No. 8-39072 (JP, A) Japanese Patent Laid-Open No. 11-319832 (JP, A) Japanese Patent Laid-Open No. 5-115870 (JP , A) JP 8-141569 (JP, A) JP 11-132560 (JP, A) JP 11-179364 (JP, A) JP 9-327407 (JP, A) JP 63-59390 (JP, A) JP-A-2001-47049 (JP, A) Jitsukaihei 2-108794 (JP, U) JP-B 41-5196 (JP, B1) (58) Fields investigated (Int.Cl . ⁷ , DB name) C02F 1/46 C02F 1/50 C02F 1/76 C25B 9/00

Claims (2)

(57) [Claims] 1. A water treatment route that is connected to a water tank for storing water to be treated, introduces the water to be treated from the water tank, sterilizes it by an electrochemical reaction, and then circulates it back to the water tank. Two or more electrode sets consisting of at least two electrode plates to be used are individually placed on the water treatment route in a state where they can be energized, and the residual chlorine sensor measures the residual chlorine concentration in the treated water. Based on this, the number of electrode groups to be energized is switched and the electrode plate is
Each electrode so that the consumption of
Memorize the number of times of energization of the group, and
A water treatment device characterized in that electricity is applied in advance . 2. A water tank for storing water to be treated,
Water to be treated is introduced from the water tank and sterilized by an electrochemical reaction.
After that, it is equipped with a water treatment route to return to the water tank.
In addition, at least two sheets of electricity used in the above electrochemical reaction
It is possible to individually energize two or more electrode sets consisting of electrode plates.
Placed on the water treatment route in an effective state and used as a residual chlorine sensor.
Based on the measurement results of residual chlorine concentration in the treated water
Switch the number of electrode groups to be energized, and
At a certain time so that the consumption of
A water treatment device characterized in that the priority of the electrode set to be energized is switched for each interval .