JPH09108678A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve filtration (purification) performance without increasing pressure drop across a filtration tank and further to use a metal compound deposited by electrolysis as an auxiliary filter medium to increase performance. SOLUTION: This water purifier is constituted of a flocculation tank 26 connected to a filtration tank 17, an electrolytic decomposition means for eluting metallic ions installed in the flocculation tank 26, and a mixing means 14, 15, 25 for mixing flocculated liquid which have been electrolyzed by the flocculation tank 26 into a circulating circuit 13. In this way, the flocculation effect of a material and the purification performance due to the clogging of the surface of the filter medium are not only improved but also they make the flocculated liquid be that of high concentration containing many high polymer compounds, thus facilitating the generation of rush phenomenon (phenomenon apt to cause clogging) and removing suspended materials in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial or domestic water purification device for purifying water such as bath water and pool water.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional water purifying apparatus of this type includes a bath 1 and a circulation pump 2 for circulating water in the bath 1, a filtration tank 3 having a filter medium filled therein, and a filtration tank. 3, an intake nozzle 4 provided in the water inlet 3, an ozone generator 5 connected to the intake nozzle 4, three-way valves 6 and 7 that switch the circulation path to filtration, cleaning, etc., and a switch that switches ozone suction and stop. One-way valve 8 and exhaust port 9 provided in the upper part of the filtration tank 3.
The water in the water tank 1 passes through the three-way valve 6 by the circulation pump 2 and the intake nozzle 4 provided in the water inlet of the filtration tank 3. At the same time, when the two-way valve 8 is closed, a negative pressure is generated in the intake nozzle 4, so that the ozone generated by the ozone generator 5 is sucked. Intake nozzle 4
The water in the bath containing ozone which has passed through is sent into the filter tank 3, where ozone is sterilized and organic substances are decomposed, and at the same time, large suspended matters such as scales are removed by the filter medium. The bath water filtered in the filtration tank 3 passed through the three-way valve 8 and returned to the water tank 1 (for example, Japanese Utility Model Laid-Open No. 63-136714).

[0003]

However, in the above-mentioned constitution, in order to filter suspended solids in water, the particle size of the filter medium can be reduced to improve the filtering performance. However, there was a problem that the pressure loss of No. 2 increased and the size of the purification (filtration) tank increased.

The present invention solves such a conventional problem, and by dissolving metal ions by electrolysis to generate a polymer colloid, fine particles such as bacteria smaller than the gaps formed by the granular filter medium are formed. Purification is possible by aggregating suspended substances to form flocs larger than the gaps formed by the granular filter media, and in addition, a high-concentration polymer colloid with aggregating action is stored in an aggregating tank provided separately from the aggregating means. It is an object of the present invention to provide a water purification device that improves the filtration performance of a filtration means in a short time by utilizing the rush phenomenon, which is a flocculation liquid and tends to occur if the fine particles contained in the permeated liquid have a high concentration. .

[0005]

In the water purifying apparatus of the present invention, a condensing tank connected to a filtering tank, which is a purifying means, and an electrolyzing means for eluting metal ions provided in the condensing tank, And a mixing means for mixing the condensate electrolyzed in the condensing tank into the circulation circuit. According to the present invention, the purification performance is improved without increasing the pressure loss of the filtration tank. In addition, the purification performance is improved because the compound, which is a metal that is electrolyzed and is used as the auxiliary passage material, is improved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The water purification apparatus of the present invention comprises a circulation circuit for circulating water to be purified, a forced circulation means provided in the circulation circuit, a purification means provided in the circulation circuit, and a purification means. It was composed of a separate coagulation tank, a coagulation means provided in the coagulation tank for eluting metal ions by electrolysis, and a mixing means for mixing the coagulation liquid electrolyzed in the coagulation tank with the upstream portion of the purification means. It is a thing.

A circulation circuit for circulating the water to be purified,
A forced circulation means provided in the circulation circuit, a purification means provided in the circulation circuit, a flocculation tank covered with an insulator provided separately from the purification means, and electrically insulated from the circulation circuit, and a flocculation tank It is composed of an aggregating means provided inside and eluting metal ions by electrolysis, and a mixing means for mixing the aggregating liquid electrolyzed in the aggregating tank into the upstream part of the purifying means.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, aggregation means provided upstream of the purification means for eluting metal ions by electrolysis, and energization time and current value of the aggregation means When the product becomes equal to or more than a predetermined value, it is constituted by first control means for stopping energization of the aggregating means.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, a coagulation tank provided separately from the purification means, electrolysis means for eluting metal ions, and electrolysis means And a first control means for stopping energization of the aggregating means when the product of the energizing time and the current value to the electrolyzing means exceeds a predetermined value. It is a thing.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, aggregation means provided upstream of the purification means for eluting metal ions by electrolysis, and pressure loss detection for detecting pressure loss in the purification means And a second control means for stopping the electrolysis of the aggregating means when the signal from the pressure loss detecting means is received and the value becomes equal to or more than the set value.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, a coagulation tank provided separately from the purification means, electrolysis means for eluting metal ions, and electrolysis means A mixing means for mixing the aggregating liquid into the purifying means, a pressure loss detecting means for detecting the pressure loss of the purifying means, and the electrolysis of the aggregating means when the signal from the pressure loss detecting means reaches a set value or more. It is composed of two control means.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, aggregation means provided upstream of the purification means for eluting metal ions by electrolysis, and metal ion concentration detection provided in the circulation circuit And a third control means for stopping the electrolysis of the aggregating means when a signal from the metal ion concentration detecting means is received and the value exceeds a preset value.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, a coagulation tank provided separately from the purification means, electrolysis means for eluting metal ions, and electrolysis means A mixing means for mixing the condensed liquid into the purifying means, a metal ion concentration detecting means provided in the circulation circuit,
The third control means stops the electrolysis of the aggregating means when it receives a signal from the metal ion concentration detecting means and exceeds a preset value.

A circulation circuit for circulating the water to be purified,
Forced circulation means provided in the circulation circuit, purification means provided in the circulation circuit, a flocculation tank provided separately from the purification means, and aluminum in one electrode provided in the flocculation tank,
An aggregating means for electrolyzing silver or copper on the other electrode, a current switching means for switching the polarity of the electric current applied during the electrolysis of the aggregating means, and a purifying means for purifying the aggregating liquid electrolyzed in the aggregating tank. It is composed of a mixing means to be mixed in the upstream part.

A circulation circuit for circulating the water to be purified,
The forced circulation means provided in the circulation circuit, the purification means provided in the circulation circuit, the coagulation tank provided separately from the purification means, and the aluminum provided in both electrodes provided in the coagulation tank A flocculation means for decomposing, a current switching means for switching the polarity of the current passed during electrolysis of the flocculation means, and a mixing means for mixing the flocculation liquid electrolyzed in the flocculation tank with the upstream portion of the purification means Is.

With the above structure, the invention according to claim 1 is such that when electrolysis is carried out by the aggregating means, metal ions are dissolved from the electrode of the anode into the aggregating tank, and at the same time, a colloidal polymer compound which is a metal compound. Will be deposited in the flocculation tank while having an electrical positive (+) potential. When the electrolysis solution in which the metal ions are dissolved and the metal compound is deposited is mixed into the cleaning means by the mixing means, the colloidal polymer compound which is a metal compound circulates in the circulation circuit on the surface of the filter medium filled in the cleaning means. Fine particles such as dust having an electrically negative (-) potential are captured. At this time, even fine particles such as dust that pass through the gaps of the filter medium are electrically coupled with the dissolved metal ions or the flocs of the precipitated metal compound to form larger flocs, which are captured on the surface of the filter medium. Like Further, since the electrically coupled flocs are captured on the surface of the filter medium, the gap between the filter medium on the surface of the filter medium is further reduced, and the purification performance of the purification means is improved. Bacteria) are removed. In addition, since the coagulation tank is provided separately from the purifying means, it is possible to store until the amount of the metal compound deposited in the electrolysis tank reaches a certain amount or more, and many deposited metal compounds can be stored in the purification tank at once. Rush phenomenon on the surface of the filter medium by mixing it with (when passing a low concentration liquid containing a certain particle through a substance to be passed with an opening larger than a certain particle size, a liquid with a high concentration is passed through This is more likely to cause clogging), and a cake layer is formed on the surface of the filter medium in a short time, improving the performance of the purification means.

Further, in the invention according to claim 2, since the connecting portion between the purifying means (filter tank) and the circulation circuit is electrically insulated, even if a current flows during electrolysis, only in the coagulation tank. Electricity is turned on, and it is safe to prevent electric shock accidents to the human body.

In the invention according to claim 3, the amount of metal dissolved is roughly calculated by Faraday's law by counting the product of the time for electrolysis and the current value of electrolysis. If the absolute amount of circulating water is known, the metal ion concentration can be detected. By roughly calculating the metal ion concentration and stopping the electrolysis by the first control means, the metal ion concentration can be maintained below a certain level, and the purification performance by aggregation can be stably ensured.

Further, in the invention according to claim 4, the metal ion concentration is roughly calculated by counting the product of the time for electrolysis and the current value of the electrolysis, and the electrolysis is performed by the first control means. By stopping the decomposition, the concentration of metal ions can be kept below a certain level, and the purification performance by aggregation can be secured stably.In addition, even after the electrolysis is stopped by the first control means, the suspended solids are suspended by the aggregation liquid in the aggregation tank. Grow into large floc particles, and by using this floc as an auxiliary filter medium, the purification performance can be secured in a short time.

Further, in the invention according to claim 5, since fine particles such as dust flowing in the circulation circuit are captured on the surface of the filter medium of the purifying means, the pressure loss of the purifying means slightly increases. Further, at this time, the flocs, which are metal compounds produced by the electrolysis means, are also filtered, so that the pressure loss of the purification means is considerably increased. However, if the floc which is a metal compound is not formed by stopping the electrolysis of the aggregating means, the purifying means will not be blocked by the metal compound floc and the pressure loss will be maintained, and good purification performance will be maintained. In addition, the increase of internal pressure is suppressed and the safety is improved.

Further, in the invention according to claim 6, when the flocculating liquid electrolyzed from the flocculation tank is mixed into the purifying means, the flocs, which are metal compounds produced by the electrolyzing means, are also filtered by the purifying means. Blockage due to flock progresses,
Good purification performance can be maintained, and stable purification performance can be secured in a short time by mixing an appropriate amount of flocs from the aggregation layer while detecting the internal pressure.

Further, in the invention according to claim 7, since the metal ion concentration is constantly monitored by the metal ion detecting means provided in the circulation circuit, the electrolysis can be finely controlled and the circulation circuit can be By keeping the flowing metal ion concentration constant, it is possible to control the optimum conditions for aggregation and ensure stable purification performance.

Further, in the invention according to claim 8, the metal ion concentration detecting means makes it possible to obtain optimum conditions for agglomeration and ensure stable purification performance, and at the same time, a high-concentration aggregating liquid which has been electrolyzed in advance in the aggregating tank is provided. By supplying it, the inside of the circulation circuit can be adjusted to an appropriate metal ion concentration in a short time.

In the invention according to claim 9, the aluminum hydroxide polymer colloid having a positive charge and aluminum is electrically coupled to fine particles having a negative charge such as dust and bacteria. As a result, many suspended substances are removed and the purification performance is improved because they are captured on the surface of the filter medium, and when electricity is applied with a reverse polarity, silver or copper dissolves into ions and dissolves, resulting in an antibacterial action against water (such as bacteria). It becomes possible to break the cispin bond of amino acids in the microparticles and stop the growth function of bacteria). Further, at this time, the cathode aluminum electrode is subjected to a reducing action to remove the oxide film, so that stable aggregation performance can be maintained.

The invention according to claim 10 not only improves the purification performance due to the formation of aluminum hydroxide but also allows the aluminum hydroxide to be constantly eluted even when the current switching means is switched. The surface is subjected to a reducing action and the oxide film is removed, so that stable aggregation performance can be maintained.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, 10 is a bathtub,
The bathtub 10 is provided with a suction port 11 and a discharge port 12. Further, a circulation circuit 13 is provided from the suction port 11 to the discharge port 12.
Is a forced circulation means, circulation pump 14, three-way valve (A) 1
5, three-way valve (B) 16, filter tank 17 as a purifying means, sterilizing means 18, two-way valve (A) 19, metal ion concentration detecting means 2
0, a heater 21 as a heating means is connected. Further, the filter tank 17 includes a straightening plate 17 (a), a granular filter material 17 (a), a filter bed 1
It is composed of 7 (c). Further, the inflow portion and the outflow portion 18 of the filtration tank 17 are connected to the differential pressure detection means 22 of the filtration tank 17. A discharge pipe 23 is connected above the filtration tank 17 through a two-way valve (B) 24. Also, three-way valve (A)
A mixing pipe 25 is provided from 15 to an upstream portion of the three-way valve (B) 16 via a coagulation tank 26 so as to bypass a part of the circulation circuit 13. The flocculation tank 26 has an electrolytic plate (c) having an aluminum plate 26 (a) as an anode and silver or copper 26 (a) as a cathode, and a check valve 26 made of a non-conductive resin at the inflow and outflow parts. It has (d). Further, a washing pipe 27 is provided upstream of the three-way valve (B) 16 to the two-way valve (A) 19 so as to bypass the circulation circuit 13 and the filtration tank 17.

Reference numeral 28 is for detecting the electrolysis time of the electrolysis means and the current value of the electrolysis, respectively, and calculating the product of the current value and the time of the electrolysis, and stopping the electrolysis when the value exceeds a preset value. A controller (A) which is one control means, and a controller (A) which is a second control means for switching the three-way valve (A) 15 which is a part of the mixing means in response to the detection signal of the differential pressure detection means 22 (29). B), 30 is a controller (C) which is a third control means for receiving the detection signal of the metal ion concentration detection means and switching the three-way valve (A) 15 which is a part of the mixing means, and 31 is an electric It is a current switching means of a direct current capable of switching the current of the disassembling means 26 (c) to plus and minus. The mixing means is composed of a three-way valve (A) 15, a mixing pipe 25 and a circulation pump 14. 32, 3
Reference numerals 3 and 34 are arrows showing the flow of water when the electrolysis solution is mixed and in the cleaning operation, when the electrolysis solution is not mixed and in the cleaning operation, and when the cleaning means is washed.

Next, the operation during the cleaning operation will be described with reference to FIGS. 1 and 2. The coagulation tank 26 side of the three-way valve (A) 15 is opened, the washing pipe 27 side of the three-way valve (B) 16 is closed, and the two-way valve (A) 19
When the circulation pump 14 is operated with the two-way valve (B) 24 open and the two-way valve (B) 24 closed, the bath water in the bathtub 10 is sucked into the circulation pump 14 from the suction port 11 and the three-way valve (A) from the circulation pump 14 is drawn.
It passes through 15 and flows into the flocculation tank 26. The bath water flowing into the aggregating tank 26 becomes an aggregating liquid containing flocs in which aluminum ions are dissolved and aluminum hydroxide is agglomerated by the electrolyzing means 26 (c) and passes through the mixing pipe 25 and the three-way valve (B) 16. It flows into the filtration tank 17. Filtration tank 1
The bath water flowing into 7 and mixed with the aggregating liquid is the rectifying plate 17
The flow is rectified by (a) and large dirt and aggregated bacteria are separated by the granular filter material 17 (a) and passed through the filter bed 17 (c), and the sterilization means 18, two-way valve (A) 19, metal ion Concentration detection means 2
0, passes through the heater 21, and is purified and discharged from the discharge port 12 into the bath 10. This metal ion concentration detecting means 20
Always detects the metal ion concentration, and when the detected signal exceeds the set value set by the controller (C) 30, the three-way valve (A) 15 is switched from the flocculation tank 26 side to the circulation circuit 13 side, The aluminum ion concentration in the bath water will not increase.

At this time, the electrolysis means 26 (c) calculates the product of the current value from the start of electrolysis and the electrolysis time, and if it is equal to or more than the set value, the electrolysis is performed by the controller (A) 28. Be stopped.

As described above, before the aluminum ion concentration reaches the set value of the controller (C) 30, the controller (A)
Before the detection value of 28 reaches the set value, the flocs of aluminum hydroxide and the fine particles such as aggregated bacteria and dirt are bound to the surface of the granular filter material 17 (c) of the filtration tank 17 and gradually filtered.
In some cases, the pressure loss of No. 7 increases. At this time, filter tank 1
The differential pressure detection means 22 of 7 detects the differential pressure,
(B) When the value exceeds the set value of 29, a three-way valve that is a mixing means
(A) 15 can be switched from the coagulation tank 26 side to the circulation circuit 13 side, and purification can be performed without increasing the pressure loss of the filtration tank 17. At the same time, electrolysis proceeds in the coagulation tank 26, and dirt, bacteria, and the like contained in the bath water contained in the coagulation tank 26 coagulate with the flocs of aluminum hydroxide to be present as large particles.

After electrolysis in the coagulation tank 26 to produce aluminum hydroxide, a three-way valve (A) as a mixing means is used.
When 15 is switched from the circulation circuit 13 side to the flocculation tank 26 side, the flocculation liquid containing a lot of aluminum hydroxide flocs flows into the filtration medium 17 (B) to flow into the filtration medium 17 (B) surface. In this case, the rush phenomenon is likely to occur, a cake layer is formed, and the purification performance of the filtration tank 17 is improved in a short time.

Next, the operation at the time of cleaning the filter tank 19 will be described with reference to FIG. Open the three-way valve (A) 15 side of the flocculation tank 26,
When the circulation pump 14 is operated with the three-way valve (B) 16 on the cleaning pipe 27 side, the two-way valve (A) 19 closed, and the two-way valve (B) 24 open, the bath water in the bathtub 10 The three-way valve (A) 1 is sucked from the suction port 11 to the circulation pump 14 and then from the circulation pump 14.
It passes through 5 and flows into the flocculation tank 26. The bath water flowing into the coagulation tank 26 becomes a liquid for sterilizing electrolysis in which silver ions or copper ions are dissolved by the electrolyzing means 26 (c), and is a mixing pipe 25, a three-way valve (B) 16, a cleaning pipe 27, and sterilization. It flows through the means 18 and into the filter tank 17. The bath water that has flowed into the filtration tank 17 is rectified by the filter bed 17 (c) and flows from the lower side to the upper side to raise the granular filter material 17 (a) to raise the granular filter material 1
The two-way valve from the drain pipe 23 containing the dirt and the agglomerated bacteria that have accumulated on the surface layer of the granular filter medium 17 (a) after washing 7 (a)
(B) It is discharged via 24. Further, the oxide film is also removed from the surface of the aluminum electrode of the cathode. If a sterilizing means is also used for cleaning, bath water that has been sterilized during cleaning is used, and it is possible to reduce the growth of bacteria in the filtration tank 17.

Next, the operation of cleaning the filter tank 19 when both electrodes are made of aluminum will be described. With the coagulation tank 26 side of the three-way valve (A) 15 closed, the washing pipe 27 side of the three-way valve (B) 16 open, the two-way valve (A) 19 closed, and the two-way valve (B) 24 open. When the circulation pump 14 is operated, the bath water in the bathtub 10 is sucked into the circulation pump 14 through the suction port 11, and the three-way valve (A) 15, the three-way valve (B) 16, the cleaning pipe 27, and the sterilizing means 18 are supplied from the circulation pump 14. To flow into the filtration tank 17.
The bath water flowing into the filtration tank 17 is rectified by the filter bed 17 (c) and flows upward from below to raise the granular filter material 17 (a) to wash the granular filter material 17 (a) and to remove the granular filter material 17 (a). ) Containing dirt and agglomerated bacteria accumulated on the surface layer of the above) is discharged from the drainage pipe 23 through the two-way valve (B) 24. At this time, if electrolysis is performed by the electrolysis means 26 (c), the oxide film on the surface of the aluminum electrode of the cathode is removed, aluminum ions are dissolved from the anode, and aluminum hydroxide is formed. It is possible to dissolve aluminum ions and produce aluminum hydroxide while preventing the formation of an oxide film on the aluminum electrode by switching the electricity supply to the electrolysis means 26 (c) by the current switching means 31. The cleaning operation is the same as that described above except that aluminum ions are dissolved at the aluminum electrode of the anode and the oxide film is removed at the same time on the anode.

Further, FIGS. 4 and 5 show a filter tank 3 as a purifying means.
5, a flow regulating plate 35 (a) for controlling the flow inside the filter 5, a filter bed 35 (a) for supporting the granular filter medium (c), and an electrolyzing means which is an aggregating means provided on the upstream side of the granular filter medium 35 (c). Aluminum electrode 3
5 (d) and a silver or copper electrode 35 (e), which is a second embodiment. Regarding the operation, since the three-way valve 15 is eliminated from the first embodiment, the electrolysis means is controlled to be turned on and off by the controller (A) 28, and the control method is slightly different but the other is the same and omitted. To do.

According to this embodiment, it is not possible to freely form the amount of flocs of agglomeration due to electrolysis while performing the purification operation, but it is possible to design compactly by incorporating two functions in one. .

[0036]

As is apparent from the above description, the following effects can be obtained by the water purifying apparatus according to the first aspect of the invention. In addition to improving the purification effect because the particle size of the suspended substance can be increased by the aggregating action, metal compounds produced by electrolysis become particles (some of which become polymer colloids) It can be used as an auxiliary filter medium to improve the filtration performance of the filtration tank.
Furthermore, by separating the coagulation tank from the purification means (filtration tank), the concentration of the metal compound can be adjusted regardless of the purification operation, and the amount of floc formation of the metal compound can be adjusted to improve the purification performance by the rush effect as an auxiliary filter medium. be able to.

According to the water purifying apparatus of the second aspect of the present invention, by electrically insulating the coagulation tank from the circulation circuit, electrolysis can be performed even during bathing and there is no fear of electric shock.
In addition to being able to bathe with peace of mind, it is possible to electrolyze by increasing the voltage and current, and it is possible to produce a large amount of polymer colloids in a short time and to exhibit purification performance in a short time.

According to the water purifying apparatus of the third aspect of the present invention, the amount of metal ions can be easily grasped by knowing the electrolysis time and the amount of energization during electrolysis, and the metal ion concentration is detected. It is possible to grasp the metal ion concentration without needing to obtain stable purification performance at low cost.

Further, according to the water purifying apparatus of the invention as claimed in claim 4, the metal ion concentration can be grasped at a low cost and a stable purifying performance can be secured, and the suspended solids are large due to the flocculating liquid in the flocculating tank. The purification performance can be secured in a short time by growing the floc particles and using them as an auxiliary filter medium.

Further, according to the water purifying apparatus of the invention as claimed in claim 5, not only does the pressure loss of the purifying means be suppressed within a predetermined value even if the pressure loss of the purifying means increases, and the safety is improved. , Can maintain good purification performance.

Further, according to the water purifying apparatus of the invention of claim 6, not only the pressure loss of the purifying means is suppressed and the safety is improved, but also the purifying means having good purifying performance can be maintained. Further, while detecting the internal pressure of the purifying means, a stable purification performance can be secured by mixing an appropriate amount of flock-like particles from the coagulation tank.

Further, according to the water purifying apparatus of the invention as claimed in claim 7, since the metal ion concentration detecting means is provided in the circulation circuit to control the aggregating means, the metal ion concentration can be controlled with high accuracy and is stable. Agglomeration performance can be secured.

According to the water purifying apparatus of the invention of claim 8, stable coagulation performance can be secured by controlling the metal ion concentration with high accuracy, and the high concentration obtained by electrolyzing in advance in the coagulation tank is obtained. By supplying the aggregating liquid of (3), the inside of the circulation circuit can be adjusted to an appropriate metal ion concentration in a short time, and an appropriate aggregating performance can be secured in a short time.

According to the water purifying apparatus of the invention of claim 9, aluminum is used as the anode of the electrolyzing means and silver and copper are used as the cathode of the electrolysis means, whereby aluminum hydroxide can be agglomerated by the polymer colloid and stabilized. In addition to ensuring the purification performance, the oxide film on the aluminum electrode can be removed by energizing in the opposite polarity, and stable cohesiveness can be secured. Furthermore, sterilizing water can be produced by dissolving silver ions or copper ions, and highly reliable purification performance can be obtained.

Further, according to the water purifying apparatus of the invention as set forth in claim 10, by using aluminum for the anode and the cathode of the electrolyzing means, aluminum hydroxide can be agglomerated by the polymer colloid and stable purification performance can be secured. In addition, it is possible to remove the oxide film of the aluminum electrode and regenerate the surface by energizing in the opposite polarity, so that stable aggregation performance can be secured.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing a water purification apparatus in an aggregated state and a purified state in an embodiment of the first to tenth inventions.

FIG. 2 is a system configuration diagram showing a non-aggregated state and a purified state of the apparatus.

FIG. 3 is a system configuration diagram showing a cleaning state of the device.

FIG. 4 is a system configuration diagram showing a water purification apparatus in a condensed state and a purified state in a second embodiment of the third, fifth, and seventh inventions.

FIG. 5 is an enlarged view of the filtration tank of the device.

FIG. 6 is a schematic configuration diagram of a conventional water purification device.

[Explanation of symbols]

 10 bath 13 circulation circuit 14 circulation pump 15 three-way valve (A) 16 three-way valve (B) 17 filtration tank 20 metal ion concentration detection means 22 differential pressure detection means 25 mixing pipe 26 electrolysis tank 26 (a) aluminum electrode 26 (a) ) Silver or copper electrode 26 (d) Check valve (insulator) 28 Controller (A) 29 Controller (B) 30 Controller (C) 31 Current switching means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Furuta 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (11)

[Claims] 1. A circulation circuit for circulating purified water, a forced circulation means provided in the circulation circuit, a purification means provided in the circulation circuit, and a coagulation tank provided separately from the purification means. A water purification apparatus comprising: an aggregating unit that is provided in the aggregating tank to elute metal ions by electrolysis; and a mixing unit that mixes the aggregating liquid electrolyzed in the aggregating tank into an upstream portion of the purifying unit. 2. The water purifier according to claim 1, wherein the coagulation tank is covered with an insulator and electrically insulated from the circulation circuit. 3. A circulation circuit for circulating water to be purified, a forced circulation means provided in the circulation circuit, a purification means provided in the circulation circuit, and a metal provided by electrolysis provided upstream of the purification means. A water purifying device comprising an aggregating unit for eluting ions and a first control unit for stopping the energizing of the aggregating unit when the product of the energizing time and the current value to the aggregating unit exceeds a predetermined value. 4. An aggregating means, an aggregating tank provided separately from the purifying means, an electrolyzing means for eluting metal ions, and a mixing means for mixing the aggregating liquid produced by the electrolyzing means with the purifying means. The water purification device according to claim 3, wherein the water purification device comprises: 5. A circulation circuit for circulating water to be purified, a forced circulation means provided in the circulation circuit, a purification means provided in the circulation circuit, and a metal provided by electrolysis provided upstream of the purification means. An aggregating unit that elutes ions, a pressure loss detecting unit that detects a pressure loss of the purifying unit, and a second that stops the electrolysis of the aggregating unit when a signal exceeds a set value upon receiving a signal from the pressure loss detecting unit. A water purification device including a control means. 6. The aggregating means comprises an aggregating tank provided separately from the purifying means, an electrolyzing means for eluting metal ions, and a mixing means for mixing the aggregating liquid produced by the electrolyzing means with the purifying means. The water purification device according to claim 5, wherein the water purification device comprises: 7. A circulation circuit for circulating water to be purified, a forced circulation means provided in the circulation circuit, a purification means provided in the circulation circuit, and a metal provided by electrolysis provided upstream of the purification means. An aggregating means for eluting ions, a metal ion concentration detecting means provided in the circulation circuit, and a signal for receiving the signal from the metal ion concentration detecting means to stop electrolysis of the aggregating means when the value exceeds a preset value. A water purification device equipped with three control means. 8. An aggregating means, an aggregating tank provided separately from the purifying means, an electrolyzing means for eluting metal ions, and a mixing means for mixing the aggregating liquid produced by the electrolyzing means with the purifying means. The water purification device according to claim 7, which is constituted by 9. The water purifier according to claim 1, 3, 5 or 7, wherein aluminum is used for the electrolysis positive electrode of the aggregating means. 10. A current switching means for switching the polarity of a current applied during electrolysis of the aggregating means, wherein aluminum is used for one electrode of the electrolysis of the aggregating means and silver or copper is used for the other electrode. Item 1. The water purification device according to item 1, 2, 4, 6 or 8. 11. An aluminum electrode is used for both electrodes of the electrolysis of the aggregating means, and a current switching means for switching the polarity of the current to be applied during the electrolysis of the aggregating means is provided. 8. The water purifier according to 8.