JPH09141282A - Circulation purifying apparatus for contaminated liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus capable of preventing deterioration in decomposition action caused by the deposition of a decomposed product on a base material, on which a useful microorganisms are fixed, purifying a contaminated liquid even just after the apparatus is newly installed or the base material is cleaned and heating the contaminated liquid to a desired temp. by a burner combustion heating means. SOLUTION: This circulation purifying apparatus is constituted so as to store the liquid 12 contaminated with time in a liquid storing means 10 and to purify and sterilize the liquid 12 outside of the storing means 10 while circulating with a pump. In such a case, the apparatus is composed of a biological purifying means 40 for decomposing and purifying organic materials contained in the liquid 12 with microorganisms, an electrolyzing means 38 for electrolyzing the liquid 12 to accelerate the oxidation decomposition of the organic materials, a physical filtration means 42 for collecting and filtering contaminants in the liquid 12 and a liquid heating means 15 provided with a burner combustor 11 and a heat exchanger 13, and the circulation passage of the contaminated liquid is formed by connecting successively the biological purifying means 40, the electrolyzing means 38, the physical filtration means 42 and the liquid heating means 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for circulating and purifying contaminated liquid, and more particularly to circulating a liquid which is contaminated over time, such as bath water in a bathtub or water in a warm water pool. It can be purified and sterilized, and in addition, it can be heated to a required temperature by a burner type heating means for burning gas, petroleum, etc., and is particularly preferably used for household and commercial use. It relates to a circulation purification device.

[0002]

2. Description of the Related Art For example, bath water stored in a bathtub is unavoidably contaminated with dust, sand, and other organic substances such as dirt and hair during bathing, and is contaminated over time, resulting in turbidity, odor, and other sliminess. It is generally known that comfort during bathing is impaired. In addition, the situation is exactly the same in the pool as well, and with use, the stored water in the pool is contaminated over time, which impairs comfort during swimming and is unsanitary. In this case, if the stored water in the bathtub or pool is replaced with new water each time it is used, the problems described above will not occur, which is ideal, but the cost of using tap water and the cost of boiling it in hot water There are various drawbacks, such as the fact that (for example, in the case of a warm water pool) becomes bulky, it takes time to exchange water, and that it is impossible to enjoy bathing or swimming at any time.

As one solution proposal for such a problem, a circulation purification device for a bath generally known as a "24-hour bath" is known. This device is intended especially for domestic use and contains a cartridge in which useful microorganisms are propagated on an aggregate substrate such as crushed stone, gravel or other granular ceramic, and bath water is forced into the cartridge. It can be recycled. A filter made of, for example, sponge is provided in the communication path between the circulation device and the bath. At the time of use, the circulating pump incorporated in the device is driven to suck the bath water in the bathtub, and the sponge filter collects and filters large dust such as hair and thread waste mixed in the bath water. . Then, the pre-filtered bath water is passed through the cartridge, where organic substances such as dirt and body fat in the bath water are decomposed by microorganisms to be cleaned up to an allowable value or less.

[0004]

However, in the above-described purification apparatus according to the prior art, when the organic matter in the bath water is decomposed by the microorganisms propagated on the aggregating base material, fine contaminants produced by the decomposition action. Adhere to the surface of the substrate. For this reason, it is pointed out that if the purification of the bath water with microorganisms is continued, the contaminants cover the surface of the base material in a film form, and the decomposition action of the microorganisms is significantly reduced. In addition, when the amount or size of organic matter exceeds the ability to decompose microorganisms, it takes a considerable amount of time to completely decompose the organic matter, and accumulates on the substrate surface. It was causing a decline.

In addition, since aggregate base materials such as crushed stone, gravel and other granular ceramics, which function as a carrier for microorganisms, are considerably heavier than water, bath water is introduced into the cartridge filled with the base materials. However, it does not flow, and therefore, it is hardly expected that the organic substances adhered / deposited on the surface of the base material will be naturally peeled off by the inflow action of the bath water. For this reason, in the conventional device, it is necessary to wash water substantially forcibly by injecting water into the collective base material in the cartridge from the opposite direction or by aerating the base material with air. It was Further, depending on the model, it is also necessary to take out the cartridge from the apparatus and mechanically agitate the collective base material inside or the user manually agitate. In this way, when the base material is regularly cleaned, continuous purification of bath water is interrupted and bathing becomes impossible, and in most cases, the bath water has to be considerably discarded from the bath, which saves water and reduces costs. From a viewpoint, it is a big problem. Further, in order to sufficiently purify the bath water with the collective base material in which the microorganisms are propagated, it is necessary to secure the area where the base material comes into contact with water as much as possible, and therefore a considerable amount of base material is prepared. It is desirable to do. However, since the crushed stone, gravel, and other granular ceramics, etc. constituting the base material are considerably heavy, there is a drawback that the weight of the purifying device itself becomes heavy, which makes it inconvenient to handle.

Further, in order for the microorganisms to exert a sufficient decomposing power for organic substances, it is necessary that the microorganisms are properly propagated on the surface of the base material. However, since it is difficult to immobilize microorganisms in advance in the collective substrate typified by the above-mentioned granular ceramics, the bath water is circulated after the purification device is installed, and the microorganisms living in the bath water are circulated. It has to wait for the spores to naturally propagate and settle on the substrate surface. Further, when the collective substrate is washed regularly, the microorganisms already propagated and fixed on the substrate may be removed more than necessary. Propagation of microorganisms and stable colonization generally take several days to several weeks, during which purification of bath water by microorganisms can hardly be expected. For this reason, after the cleaning device is newly installed in the bathtub or after cleaning the collective base material in the cartridge, the cleaning function of the bath water does not work, and water stains progress, causing unpleasant turbidity and odor. There was an inconvenience that caused such problems. Therefore, after new equipment is installed or after cleaning the base material, it is necessary to refrain from bathing until the microbes are properly purified, and bath water is used several times until the microbes are stably propagated on the base material. There is a problem in that it takes time and labor to re-install, the amount of water used increases, and the cost increases.

Regarding the above-mentioned "24 hour bath",
In order to be able to take a bath at any time, it is necessary to keep the temperature of the bath water constantly at 38 ° C. to 40 ° C., which is a suitable bath temperature, and the conventional circulation purification device controls the temperature by an internal electric heater. I am supposed to do it. However, electric heaters generally do not have a large heat capacity, so when many people take a bath continuously and the water temperature drops,
It is difficult to raise the temperature in a short time during the season when the outside temperature decreases. The electric heater having a large heat capacity has a drawback that the manufacturing cost becomes high and the electricity cost increases. That is, as long as the electric heater is used as the heating source, the reheating function for rapidly raising the temperature of the bath water cannot be expected due to the manufacturing cost, electricity costs, and the like.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in order to suitably solve the problems inherent in the above-described conventional apparatus for purifying contaminated liquids, and is a base material on which microorganisms that decompose organic substances are fixed. It prevents degradation products from degrading due to the accumulation of decomposition products, and can clean the contaminated liquid even immediately after new equipment is installed or immediately after cleaning the base material. It is an object of the present invention to provide a circulation purification device that can raise the temperature of the liquid to a required temperature as needed.

[0009]

In order to overcome the above-mentioned problems and preferably achieve the intended purpose, the present invention stores a liquid contaminated with time in a liquid storage means and stores the contaminated liquid. In a circulation purification device for polluted liquids, which is purified and sterilized while being circulated by a pump outside the means, a microbial purification means for decomposing and purifying organic substances contained in the polluted liquid by microorganisms, and electrolysis of this polluted liquid And an electrolysis means for accelerating the oxidative decomposition of the organic matter, a physical filtration means for collecting and filtering pollutants contained in the polluted liquid, and a liquid heating means provided with a burner combustor and a heat exchanger. It is characterized in that a circulation path for the contaminated liquid is constituted by connecting a microbial purification means, an electrolysis means, a physical filtration means and a liquid heating means.

[0010] Similarly, in order to overcome the above problems and preferably achieve the intended purpose, another invention of the present application is to purify and sterilize the contaminated liquid by pumping up the contaminated liquid in the storage tank with a circulation pump. In the circulation purification device for contaminated liquid, which is then returned to the storage tank again, a microbial purification tank filled with a granular synthetic polymer gel in which microorganisms that adsorb and decompose organic substances contained in the contaminated liquid are present, A liquid comprising an electrolytic cell for electrolyzing the polluted liquid to accelerate the oxidative decomposition of the organic matter, a physical filter tank for collecting and filtering pollutants contained in the polluted liquid, a burner combustor and a heat exchanger It is characterized by comprising a heating device, and connecting the microbial purification tank, the electrolytic tank, the physical filtration tank, and the liquid heating device to form a circulation path for the contaminated liquid.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a circulating liquid purification apparatus for a contaminated liquid according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. As an example, a circulation purification device provided in a domestic bathtub as a heating source for boiling water by burning city gas or propane gas with a burner will be described, but in addition to this, it can be suitably used for a hot water pool or the like. Of course. Further, the heating source is not limited to the gas burner, and may be, for example, a type of burning petroleum with the burner.

(Regarding Overall Structure of Circulation Purification Device) FIG.
1 shows a schematic configuration of a circulation purification apparatus according to an embodiment of the present invention, which purifies bath water 12 stored in a bath 10 and contaminated with time while pumping circulation of the bath water 12 outside the bath 10. And sterilization. That is, as shown in FIG. 10, the circulation purification device according to the embodiment has a bathtub 10
It is basically composed of a water supply / drainage unit 14 which is detachably attached to the unit, and an apparatus main body 20 which is connected to the unit 14 via a water absorption hose 16 and a drainage hose 18. This device body 20 is installed, for example, at the edge of the bathtub 10 and is supplied with power via an earth leakage breaker 22 and a cable 24, and is surely grounded by an earth cable 26 to ensure complete protection against earth leakage and electric shock. Has been. As will be described later with reference to FIG. 11, the water supply / drainage unit 14 is detachably attached to the inner wall surface of the bathtub 10 by a suction cup 28 as an example, and is located below a general storage level of the bath water 12.

The water supply / drainage unit 14 shown in FIGS. 10 and 11 comprises, for example, a rectangular box-shaped casing 30,
On the front surface of the casing 30, there are provided a water suction port 32 for sucking the bath water in a vertical relationship and a discharge port 34 for returning the purified bath water to the bath 10. Further, the suction cup 28 is arranged on the back surface of the box-shaped case 30 so that the water supply / drainage unit 14 can be attached to the inner wall surface of the bathtub 10. The water suction port 32 is connected to the apparatus main body 20 through a water suction hose 16 and a filter 36 made of, for example, a sponge material is detachably provided at the opening of the water suction port 32 to remove large dusts mixed in the bath water. It is designed to collect and remove hair and other foreign matter. Further, the discharge port 34 is communicatively connected to the apparatus body 20 via the drain hose 18.
The water suction port 32 and the discharge port 34 are completely immersed in the bath water when the water supply / drainage unit 14 is attached to the inner wall surface of the bathtub 10. Then, when the circulation purification device described later is operated, the bath water in the bathtub 10 flows into the device body 20 through the water suction port 32 and the water suction hose 16 under the action of the circulation pump, and is purified and sterilized there. Drainage hose 18 after
And the cycle of returning to the bath 10 via the outlet 34 is repeated.

As shown in FIG. 1, the apparatus main body 20 of the circulation purifying apparatus has a microbial septic tank 40 for adsorbing and decomposing organic substances contained in the bath water 12 contaminated with time by microorganisms to purify it, and the bath water 12. An electrolytic bath 38 that electrolyzes and promotes oxidative decomposition of organic matter such as dirt contained therein;
A physical filtration tank 42 for collecting and filtering organic or inorganic pollutants contained in the bath water 12, a water heating device 15 having a gas combustor (hereinafter referred to as "burner") 11 and a heat exchange pipe 13. These tanks are connected to each other through a pipe in which the bath water 12 is circulated, and a part of the communication pipe is connected to the heat exchange pipe 13 of the water heating device 15. .

In FIG. 1, the water absorption hose 16 provided in the water supply / drainage unit 14 is connected to the inlet side of the microbial purification tank 40 via a bath water circulation pump 44, and the microorganism purification tank 40 is connected.
The outlet side of is connected to the inlet side of the electrolytic cell 38 via a pipe line 46. Further, the outlet side of the electrolysis tank 38 is connected to the inlet side of the physical filtration tank 42 via a pipe 48, and the outlet side of the physical filtration tank 42 is connected via a pipe 52 to a heat exchange tube in the water heating device 15. It is connected to the inlet side of 13. Further, the outlet side of the heat exchange pipe 13 in the water heating device 15 is provided with a pipe 54.
It is connected to the drain hose 18 via. A flow rate sensor 56 for detecting the flow rate of the bath water is inserted in the pipe 54 through which the bath water returns to the bath 10, and the outlet side of the physical filtration tank 42 and the inlet side of the water heating device 15 are connected. A temperature sensor 58 for detecting the temperature of the bath water is inserted in the pipe 52. Further, for example, inside the physical filtration tank 42, a water level sensor 60 for monitoring the water level in the tank is provided. The position of the water level sensor 60 is not limited to the physical filtration tank 42, and may be inside the electrolytic tank 38 or the microorganism purification tank 40. These sensors are
The control circuit 62 shown in the control block of FIG. 13 is connected to input information necessary for various controls of the apparatus main body 20 to the circuit 62.

(About water heating device) The water heating device 15
For example, as shown in FIG. 3, when only one bath water is provided, a closed loop pipe system for circulating bath water is formed between the bath 10 and the water heating device 15, and the bath water is exclusively used. It will be used only for reheating. However, as shown in FIGS. 1 and 2, a first heating device 17 for heating the bath water,
Second heating device 19 for heating tap water and supplying it to the hot water supply system
It is generally recommended to configure the water heating device 15 with That is, the first heating device 17 is mainly used for reheating the bath water, and in consideration of the durability of the heat exchange pipe 13 when the burner 11 is ignited, the heat exchange pipe 1
The bypass pipe 21 is communicatively connected between the inlet-side pipe line 52 and the outlet-side pipe line 54 of No. 3, and the first closing / opening valve 23 driven by an electromagnetic valve is inserted in the bypass pipe 21. . The second heating device 19 also has a burner 25 and a heat exchange pipe 27, and the inlet side of the heat exchange pipe 27 is connected to an external water supply system 29. Further, the heat exchange tube 27
The outlet side is branched into two, one is connected to a hot water supply system 31 such as a kitchen or a shower not shown, and the other is connected to the first
At the inlet side of the heat exchange pipe 13 in the heating device 17, the pipe 33
Connected through. A check valve 35 and a second open / close valve 37 driven by a solenoid valve are inserted in series in the conduit 33. Reference numeral 41 represents a blower provided in each of the first heating device 17 and the second heating device 19.

With the second closing valve 37 closed,
When the burner 11 of the first heating device 17 is ignited, the bath water circulated by the pump 44 is heated by the heat exchange tube 13 as will be described later, so-called reheated water is added to the bath 1
Returned to 0. When the burner 25 of the second heating device 19 is ignited, the tap water supplied from the water supply system 29 is heated by the heat exchange pipe 27 and the hot water is supplied to the hot water supply system 31.
Further, if the second close valve 37 is opened and both burners 11 and 25 of the first heating device 17 and the second heating device 19 are ignited,
After the temperature of the tap water from the water supply system 29 is raised by the second heating device 19, it is further raised by the first heating device 17,
Bath water reheated and bath water newly replenished are simultaneously supplied to the bathtub 10.

(About microbiological septic tank) Microbiological septic tank 40
Is for adsorbing and decomposing and purifying the organic matter contained in the bath water 12 by the decomposing action of microorganisms, and in this embodiment, a synthetic polymer gel is preferably used as a carrier for microorganisms. As the synthetic polymer gel, granular polyvinyl alcohol (hereinafter referred to as "PVA") gel having excellent water resistance, elasticity and flexibility and having high water content is preferably used. For example, as shown in FIG.
Is an upright cylindrical casing 70, a tubular water channel 72 disposed inside the casing 70 and extending along a central axis, an inflow port 70a and an outflow port opened at the bottom of the casing 70. 70b and the casing 70
It is basically composed of a required amount of PVA gel 74 filled inside. The inlet 70a and the outlet 70b are
A filter 76 having a mesh size that prevents the granular PVA gel 74 from flowing out is provided. Therefore, the bath water that has flowed into the casing 70 through the inflow port 70a reverses after rising in the centrally located tubular water flow path 72 and descending the annular water retention portion 78, and then outflow port 70b.
It is something that flows out from.

As the PVA gel 74, it is desirable to use the PVA gel which has been entrapped and fixed so that useful microorganisms that decompose organic substances such as dirt and body fat contained in bath water are included in advance. Examples of useful microorganisms of this kind include Pseudomonas spp., Aspergillus spp.
illus) and Saccharomycetes, microorganisms and enzymes, and other activated sludge used for wastewater treatment, nitrifying bacteria, denitrifying bacteria and the like. By comprehensively immobilizing such useful microorganisms on the PVA gel 74, the organic substances are decomposed by the microorganisms immediately after the start of using the apparatus. Each of the PVA gels 74 is in the form of particles having a diameter of about several mm, and the PVA gels 74 are filled so as to occupy about 20% to 50% of the casing 70. That is, by adjusting the filling amount of the PVA gel 74 to this extent, the bath water flowing into the casing 70 can freely flow the PVA gel 74, so that the residue produced after being decomposed by microorganisms is PVA. The disadvantage of adhering to the surface of the gel 74 is avoided. When a gel that has not been subjected to entrapping immobilization of microorganisms is used as the PVA gel 74, it waits for the microorganisms to naturally land on the PVA gel 74 and propagate.

(About Electrolyzer) As shown in FIG. 9, for example, the electrolyzer 38 includes an upright box-shaped casing 64 and two electrode portions 6 arranged inside the casing at a required interval.
6, 68, and by selecting the polarity of the DC voltage applied thereto, one electrode portion 66 can function as an anode and the other electrode portion 68 can function as a cathode. . As the material of the anode 66, aluminum, stainless steel, ferrite, platinum, platinum-coated titanium (Ti) or the like is preferably used, and as the cathode 68, aluminum, platinum, platinum-coated (Ti) or the like is preferably used. To be Among these electrode materials, stainless steel and aluminum tend to be eluted into the bath water by electrolysis. In this case, since the organic substances in the bath water are aggregated with the metal ions eluted in the bath water as nuclei, it can be expected that the organic substances can be easily collected and filtered in the subsequent process. In this embodiment, platinum-coated titanium (Ti) is used for both the anode 66 and the cathode 68. The casing 64 may have a cylindrical shape, or the casing 64 may serve as one of the electrodes. Furthermore, the number of electrodes does not have to be a plurality of pairs, and may be an odd number array.

(Regarding Physical Filter Tank) The physical filter tank 42 is
It is for physically collecting and filtering fine organic or inorganic pollutants contained in the bath water 12, and a so-called winding filter is internally loaded as a filtering material. For example, as shown in FIG. 5, the physical filtration tank 42 includes a cylindrical casing 80 that is vertically arranged, a winding filter 82 that is detachably concentrically arranged inside the casing 80, and an inlet port that is opened at the bottom of the casing 80. 80
It is basically composed of a and the outlet 80b. The winding filter 82 is constructed by winding a required number of windings of a linear material 86 around a cylindrical core 84 as shown in the drawing, and a large number of through holes 84b in a hollow portion 84a penetrating the center of the cylindrical core 84. Has been drilled. As the linear material 86,
For example, polypropylene yarn is preferably used, and its winding density is recommended to be, for example, about 10 to 100 μm. In the winding filter 82 of the illustrated example,
A winding density of about 10 to 20 μm was adopted. In addition to the winding filter, a non-woven fabric filter or a physical filter material such as zeolite or palm chit is appropriately used.

The bath water flowing into the physical filtration tank 42 through the inflow port 80a passes from the outer periphery of the winding filter 82 to the inner side in the radial direction of the filter, where fine pollutants contained in the bath water are contained. Physical collection / filtration is performed. The bath water that has passed through the fine wire layer of the filter 82 exits into the hollow portion 84a through a large number of through holes 84b formed in the tubular core 84, and then through the outlet 80b that communicates with the hollow portion 84a. It flows out of the tank. Also, the filtration tank 4
A part of the bath water flowing into 2 flows out of the tank as it is without passing through the winding filter 82.
That is, a part of the bath water rises in an annular space defined between the inner wall surface of the casing and the outer peripheral surface of the filter in the physical filtration tank 42, collides with the inner top portion of the casing 80 and is inverted, and then the tubular shape is obtained. Hollow part 84a provided in the core 84
To flow out of the tank through the outlet 80b. By the way, the winding filter 82 is gradually clogged due to long-term use, and the water flow resistance of the bath water passing through the filter 82 also gradually increases. In this case, in the bath water that has flowed into the physical filtration tank 42, without passing through the filter 82 and the through hole 84b of the tubular core 84, as described above, it flows out of the tank through the annular space and the hollow portion 84a. The proportion of bath water also increases. That is, when the winding filter 82 is gradually clogged, the proportion of the bath water that bypasses the filter 82 and directly goes to the outflow port 80b also increases, so that the decrease in the circulation amount of the bath water when the filter is clogged is effectively prevented. It

In this physical filtration tank 42, a normally closed valve 88 is provided in the hollow portion 84a of the cylindrical core 84, and when the winding filter 82 is clogged and the water flow resistance is gradually increased, it is gradually increased. The normally closed valve 88 may be gradually opened by the increasing pressure of the bath water to bypass a part of the bath water to the hollow portion 84a. That is, in the tubular core 84 of the winding filter 82, as shown in FIG.
As shown in FIG. 7, a normally closed valve 88 that closes the upper opening of the hollow portion 84a by the elastic force of the compression spring 90 is provided. The elasticity of the compression spring 90 is such that when the filter 82 is gradually clogged and the water resistance that increases gradually exceeds a predetermined value, the water pressure acting on the normally closed valve 88 from the outside is applied to the compression spring 90. It is set so that 90 can be gradually compressed. Therefore, as the filter 82 is gradually clogged and the water flow resistance increases, the bath water gradually opens the normally open valve 88 as shown in FIG. As a result, part of the bath water is
Without being filtered by the winding filter 82, it flows into the hollow portion 84a from the upper opening of the hollow portion 84a in the core 84, and flows out of the tank through the hollow portion 84a and the outlet port 80b.

FIG. 8 shows another embodiment of the physical filtration tank 42. The winding filter 82 loaded in the physical filtration tank 42 has a linear material 86 with a coarse winding pitch and a dense winding pitch. It is divided and wound so that it becomes a thing.
That is, the winding pitch of the upper half of the linear material 86 of the winding filter 82 is coarse, and the winding pitch of the lower half of the linear material 86 is dense. When the winding pitch of the linear material 86 is divided in this way, the passage resistance of water in the filter portion having a coarse winding pitch is smaller than that in the filter portion having a fine winding pitch. Therefore, during the filtration operation in the physical filtration tank 42, a partial difference occurs in the clogging of the winding filter 82 with time, and it is possible to adjust the time when the water flow resistance increases.

(About Ozonizer) The above-mentioned microbial purification tank 40, electrolysis tank 38, physical filtration tank 42 and water heating device 1
An ozonizer 96 shown in FIG. 13 may be separately inserted in a pipe line system for connecting 5 in communication. As will be described later, ozone is also generated when the bath water is electrolyzed in the electrolytic bath 38, and the sterilizing action is achieved. However, by additionally using the ozonizer 96, sterilization can be performed more reliably. The location of the ozonizer 96 may be in a pipeline through which the bath water circulates, but it is desirable that the ozonizer 96 is disposed at a position that does not inhibit the action of the microorganisms inhabiting the inside of the microorganism purification tank 40. The bath water circulation line and the ozonizer 96
Is connected via a solenoid valve 99 shown in FIG.
When the solenoid valve 99 is opened, ozone is injected into the bath water in the pipeline, and when the solenoid valve 99 is closed, ozone injection into the bath water is stopped.

(Regarding Control Block of Device) FIG.
The block for individually controlling the electrical components of the circulation purification apparatus according to the present invention is schematically shown, and the flow rate sensor 56, the temperature sensor 58, and the water level sensor 6 described above in the control circuit 62.
0 is connected to input the respective detection information to the control circuit 62. The memory (RAM) 98 stores various kinds of information and command data necessary for automatically operating the circulation purification device, and exchanges signals with the control circuit 62. The solenoid valve 99 is opened and closed by a valve drive circuit 89 which receives a control command from the control circuit 62.
Driven by Similarly, the circulation pump 44 is driven by a pump drive circuit 45, and the burner 11 (25) is driven by a burner drive circuit 93. The electrolytic cell 38 is driven by the electrolytic cell drive circuit 39, the ozonizer 96 is driven by the ozonizer drive circuit 97, and the display 94, which displays information necessary for various operations, is driven by the display drive circuit 95 in a timely manner. .

(Operation of Circulation Purification Device) Next, the operation of the circulation purification device according to the embodiment thus constructed will be described with reference to the flow chart shown in FIG. Prior to the operation of the purifying device, the temperature value of the bath water, the start and end times of electrolysis in the electrolytic bath 38, and the start and end times of the processing in the ozonizer 96 are set in the memory (RAM) 98. It has been done in advance. The memory
These set values input to the (RAM) are displayed on the display 94 so that they can be easily visually confirmed. Further, it is assumed that bath water is stored in the bathtub 10 to a required level of filling water.

In step S ₁ of FIG. 12, it is confirmed whether or not an operation key (not shown) provided in the circulation purification device is turned on (ON), and if the result is affirmative (YES), the circulation pump 4
4 is driven, and the bath water in the bath 10 starts to circulate in the pipeline system shown in FIG. Then, the circulating pump 44 is driven and the next operation is awaited. During this waiting, the process proceeds to step S ₂ and it is confirmed whether or not the water level of the bath water inside the physical filtration tank 42 has reached the specified value. If the result is negative (NO), an error is displayed on the display 94. The display is performed and the drive of the circulation pump 44 is stopped. The result goes to step S _3, if affirmative (YES), checks whether the flow rate of the bath water flowing through the conduit in the has reached a prescribed value, the result is negative (NO)
If so, an error message is also displayed on the display 94 and the drive of the circulation pump 44 is stopped. Positive result again
If (YES), the process proceeds to the next step S ₄ . The confirmation by the water level sensor 60 and the flow rate sensor 56 is affirmative (Y
ES), the operation of the circulation pump 44 is continued, and the bath water from the bathtub 10 contains the microbial purification tank 40, the electrolysis tank 38, the physical filtration tank 42, and the first heating device 17 (the heat exchange tube 13).
And then return to the bathtub 10 again. The process of purification / filtration in the microbial purification tank 40 and the physical filtration tank 42 in this case will be described later.

In step S ₄ , the temperature of the bath water flowing into (the heat exchange tube 13 of) the first heating device 17 is stored in the memory (RAM).
Check whether it is lower than the set value to 98, and the result is affirmative (Y
If ES, the burner 11 is automatically ignited (ON) to raise the temperature of the bath water passing through the heat exchange tube 13. If the result of step S ₄ is negative (NO), the burner 11 is automatically extinguished (OFF) and the process proceeds to the next step S ₅ . In this step S ₅ , it is confirmed whether or not the processing time in the electrolytic cell 38 previously set in the memory (RAM) 98 has come, and if the result is negative (NO), the electrolytic cell drive shown in FIG. 13 is performed. Circuit 3
9 is continuously turned off (OFF), and if the result is affirmative (YES), the electrolytic cell drive circuit 39 is turned on (ON) to start the electrolytic action of the electrolytic cell 38. The electrolysis process in this electrolysis tank 38 will be described later. Next, in step S ₆ , it is confirmed whether or not the processing time in the ozonizer 96 has come. If the result is negative (NO), the ozonizer drive circuit 97 and valve drive circuit 89 shown in FIG. 13 are continuously turned off (OFF), and if the result is affirmative (YES), the ozonizer drive circuit 97 and valve drive circuit are driven. The circuit 89 is turned on to inject ozone into the bath water in the pipeline. Then, in step S ₇ , it is confirmed whether or not the operation key is turned off (OFF). If the result is negative (NO), the process returns to the previous step S ₂ and the above-mentioned confirmation work is repeated. The result of step S ₇ is positive
If YES, the operation of the circulation pump 44 is stopped.

(Regarding Process in Microbial Septic Tank) As described above, the microbial septic tank 40 is filled with an amount such that the PVA gel 74 in which microorganisms such as bacteria have been propagated and fixed in advance can freely flow by the inflow of bath water. Has been done. Therefore, the contaminated bath water from the bathtub 10 is circulated by the circulation pump 44.
When the PVA gel 74 is sucked up by and is supplied to the microbial septic tank 40, the PVA gel 74 is tossed by the flow of the bath water and vigorously flows. When the bath water contaminated by use comes into contact with the PVA gel 74, the microorganisms propagated and fixed on the PVA gel 74 decompose organic matter such as dirt and body fat in the water to produce sludge-like contaminated residue. The contamination residue tends to adhere to the PVA gel 74 in a film form, but the PVA gel 74 is extremely difficult to adhere because it is flowing violently in the tank, and the contaminant adheres to the PVA gel 74. Even if the gel flows, it is easily peeled off. Therefore, the PVA gel 74 does not become clogged, and periodical maintenance such as cleaning processing and replacement of these PVA gels 74 becomes unnecessary. Further, since the PVA gel 74 flows violently, it is possible to secure a large effective contact area for the bath water supplied to the microbial septic tank 40, and it is possible to exert a sufficient purification power for the bath water.

Further, a part of the components of the PVA gel 74 tends to be eluted in the bath water, and the eluted components function as a coagulant for a part of the organic substances in the water and a part of the organic substances are aggregated. Leading to. Then, the partially aggregated organic matter is dispersed and mixed in the bath water together with the organic matter which is not decomposed by the microorganisms and the sludge-like pollution residue generated by the decomposition. In this example, since the PVA gel 74 used was one in which microorganisms were entrapped and fixed,
It is not necessary to wait for the microorganisms to propagate in the PVA gel 74 filled in the microorganism purification tank 40, and the ability of the microorganisms to purify organic substances can be sufficiently exhibited from the beginning of use. That is, since the organic substances are sufficiently decomposed from the beginning of the installation of the circulation purifying device, the bath water can be enjoyed bathing with clean bath water without causing turbidity or sliminess of the bath water at the beginning. However, even with PVA gel 74 that has not been subjected to entrapping immobilization of microorganisms, the elution of gel components has the effect of aggregating some organic substances as described above, so even before the microorganisms proliferate. The purification effect of is obtained.

(Regarding Process in Electrolytic Tank) In FIG. 1, the bath water, which has been purified by the microbial septic tank 40, flows into the electrolytic cell 38 through the pipe line 46, and a required DC voltage is applied. The positive electrode 66 and the negative electrode 68 are in contact with each other. Therefore, the bath water is electrolyzed to generate oxygen gas in the vicinity of the anode 66, and the hydrogen ion concentration of the bath water existing around the anode 66 becomes high and becomes acidic. Further, hydrogen gas is generated in the vicinity of the cathode 68, and the concentration of hydrogen ions in the bath water existing around the cathode 68 is lowered to become alkaline. Moreover, on the side of the anode 66, organic substances such as dirt and body fat contained in the bath water are oxidatively decomposed and become minute. A part of the oxidatively decomposed organic matter becomes insoluble and aggregates in a colony state.

Further, in the vicinity of the anode 66, active oxygen is produced in the form of ozone (O ₃ ) or hydrogen peroxide (H ₂ O ₂ ). Therefore, various bacteria in the bath water are sterilized to a considerable extent by this active oxygen. Furthermore, since the vicinity of the anode 66 becomes strongly acidic and the vicinity of the cathode 68 becomes strongly alkaline due to electrolysis, the sterilizing effect is exhibited even by such a change in the hydrogen ion concentration (pH). The anode 66
Oxygen gas and acidified water generated in the vicinity of the
Hydrogen gas and alkalized water generated in the vicinity of 8 do not exist in a clearly separated state, but exist in a state where steam water is mixed in the bath water. The bath water, which is partially sterilized by the electrolytic decomposition and in which the finely divided organic substances are aggregated, is supplied from the electrolytic cell 38 to the physical filtration tank 42 via the pipeline 48 on the downstream side.

When electrolysis is carried out in the electrolytic cell 38, the pH value in the vicinity of the cathode 68 rises due to the generation of alkaline water described above, and calcium ions and magnesium ions contained in the bath water are deposited on the surface of the cathode 68. To do.
When the surface of the cathode 68 is coated with these deposits in a layered manner as described above, there is a disadvantage that the electrolytic action is gradually reduced. Therefore, in the present embodiment, the amount of water flowing into the electrolytic cell 38 after the start of electrolysis is integrated and measured by the flow rate sensor 56, and when the measured value reaches the amount of water flowing preset in the memory (RAM). Cleaning is performed by applying a DC voltage of opposite polarity to the cathode 68 and the anode 66, and dissolving the deposit covering the cathode 68. It should be noted that instead of integrating the water flow rate of the bath water, the water flow time may be integrated as a function of polarity conversion in the electrodes.

The bath water that has passed through the electrolytic cell 38 (for the process in the physical filtration tank) flows into the physical filtration tank 42 through the pipe line 48. Then, as shown in FIG. 5, most of the bath water flowing from the inflow port 80a of the physical filtration tank 42 is
From the outer periphery of the winding filter 82, it passes inward in the radial direction of the filter, where fine contaminants contained in the bath water are physically collected and filtered. Further, part of the bath water flowing into the physical filtration tank 42 rises in the annular space defined between the inner wall surface of the casing of the physical filtration tank 42 and the outer peripheral surface of the filter 82, and is inverted at the inner top of the casing. Then, the hollow portion 84a of the tubular core 84 descends and flows out of the tank as it is from the outlet 80b. That is,
Organic matter remaining without being decomposed in the electrolysis tank 38 and the microbial purification tank 40, and sludge-like contaminant residues and other insoluble organic matter generated by decomposition are collected and filtered by the filter 82, and as a result, Purified bath water is obtained at the outlet 80b. In addition, part of the bath water is bypassed without passing through the winding filter 82 as described above,
It joins with the purified bath water at the outlet 80b. The bath water treated in the physical filtration tank 42 returns to the bath 10 via the pipe 52 and the heat exchange pipe 13 of the first heating device 17, and further via the pipe 56 and the drain hose 18. In addition,
The water level of the bath water in the physical filtration tank 42 is monitored by the water level sensor 60 provided therein, and when the reference water level is not reached, an error is displayed on the display 94 shown in FIG. 13 to operate the pump 44. It is supposed to stop.

As described above, the filter 82 is gradually clogged with its use, and the water passage resistance gradually increases. When the water resistance gradually increases in this manner, the amount of bath water that has been filtered through the filter 82 in the bath water that has flowed into the physical filtration tank 42 bypasses the filter 82 and flows. The proportion of the bath water that goes directly to the outlet 80b increases. Therefore, the decrease in the circulation amount of the bath water due to the clogging of the filter 82 is effectively prevented. Further, as described with reference to FIGS. 6 and 7, the normally closed valve 88 is provided in the hollow portion 84a of the tubular core 84, and when the winding filter 82 is gradually clogged and the water flow resistance increases, the water resistance increases accordingly. The normally closed valve 88 may be gradually opened against the elasticity of the spring 90 by the pressure of the bath water to bypass the bath water to the hollow portion 84a. Further, as described with reference to FIG. 8, the winding pitch of the linear material 86 in the winding filter 82 is set to
If the filter 82 is divided into a coarse one and a dense one, a partial difference occurs in the clogging of the filter 82 with time.
It is preferable because the water flow resistance does not increase at once. An increase in water flow resistance in the filter 82 is detected by, for example, the above-described flow rate sensor 56, and the detected value is compared with the allowable resistance value stored in the memory (RAM) 98 to determine the replacement time of the filter 82. The display 9
You may make it notify to a user by 4.

(Regarding Process in Water Heating Device) The bath water which has been filtered in the physical filtration tank 42 is passed through the pipe line 52 in which the temperature sensor 58 is installed to the water heating device 15 (first heating device 17). Supplied. The temperature sensor 58 measures and monitors the temperature of the bath water passing through the pipe line 52, and when the detection result of the sensor 58 is lower than the set value in the memory (RAM) 98 shown in FIG. 13, the control circuit 62. Controls the burner drive circuit 93 to ignite the burner 11 to perform so-called reheating of the bath water. On the contrary, the detection result of the temperature sensor 58 is stored in the memory.
If it is higher than the value set in (RAM) 98, the control circuit 6
2 gives a control command to the burner drive circuit 93 to extinguish the burner 11. In this way, the bath water passing through the heat exchange tube 13 in the first heating device 17 is reheated as necessary and maintained at a temperature suitable for bathing. Further, in the embodiment of FIGS. 1 and 2 provided with the two water heating devices 17 and 19, when the amount of water in the bathtub 10 decreases, as described above, the second closing valve 37 is opened. The first heating device 17 and the second heating device 19 are ignited. As a result, the tap water from the tap water supply system 29 is heated in the first heating device 17 after being heated in the second heating device 19, and the bath water after being heated in the bathtub 10 and the new replenishing bath water are generated. Supplied together. Two water heating devices 1 are used as the water heating device 15.
When equipped with 7, 19, as will be described later, normal operation mode → bypass mode that does not pass through each tank → water filling mode in which the bath is filled with water by simply modifying the pipeline system in which the bath water circulates. It is possible to easily select the normal operation mode and the reverse cleaning mode of the physical filtration tank.

With respect to the water heating device 15, the reason why the first closed / open valve 23 is inserted in the bypass pipe 21 as shown in FIG. 1 will be described. When the bath water is not reheated, the first open / close valve 23 is opened to bypass a part of the purified bath water from the heating device 17, and when the bath water is reheated. Is closed to allow the bath water to pass through the heat exchange tube 13 exclusively and to maintain the durability of the heat exchange tube 13 by lowering the water pressure feeding pressure. That is, since the heat exchange tube 13 is for raising the temperature of the bath water by the heat from the burner 11, the tube thickness is set thin and the inner diameter of the hollow hole is set small in order to increase the heat exchange efficiency. . Therefore, the durability of the heat exchange tube 13 is not sufficiently high with respect to the water pressure applied from the inside of the tube. In particular, the bath water of the present embodiment is supplied to the heat exchange pipe 13 under high pressure by the circulation pump 44, and is not preferable from the viewpoint of maintaining the durability of the pipe.

Therefore, when only circulating the bath water without reheating, the first closing valve 23 is opened to bypass a portion of the purified bath water to the pipe 54 via the pipe 21. When reheating is performed, the first closing / opening valve 23 is closed and the circulation pump 44 is switched to a low speed operation so that the bath water is supplied to the heat exchange pipe 13 at a low supply pressure. Is. This procedure will be described with reference to the flowchart of FIG. After initializing various operation requirements, an operation key (not shown) is turned on to turn on the circulation pump 44 in normal operation. Then, in step S ₁ , it is confirmed whether or not the bath water exceeds the set flow rate, and the result is affirmative.
If (YES), the process proceeds to step S ₂ . This step S
_If the confirmation result of ₂ is affirmative (YES), the first closing valve 23 is closed and the circulation pump 44 is switched to the low speed operation. As a result, the supply pressure of the bath water becomes low, so that the burner 11 of the first heating device 17 is ignited (ON). That is, although the reheating operation is started, since the bath water passing through the heat exchange pipe 13 of the first heating device 17 is maintained at a low pressure, the heat exchange pipe 13 is maintained.
Does not impair the durability of the.

If the confirmation result of the step S ₂ is negative (NO), the burner 11 of the first heating device 17 is extinguished (OFF) and the first closed / open valve 23 is opened. The circulation pump 44 is
Switch from low speed operation to steady operation. As a result, the reheating is stopped, and the purified bath water flows separately in both the heat exchange pipe 13 of the first heating device 17 and the pipe line 21 which is the bypass line. Also in this case, the heat exchange tube 1
The durability of No. 3 is not impaired, and the circulating resistance of bath water is not increased. In addition, a switching valve is provided at the branch portion of the pipe line 52 connected to the outflow side of the physical filtration tank 42.
By switching operation of this switching valve, when the reheating is not performed, the bath water is used as the heat exchange pipe 1 of the first heating device 17.
It may be configured such that only the bypass pipe 21 is allowed to pass, without passing through 3.

(Regarding Modifications of Each Configuration) The configuration of the present invention is not limited to the embodiment described in FIG.
Various changes can be made without departing from the spirit of the invention. For example, as shown in FIG. 2, the physical filtration tank 42, the microbial purification tank 40, the electrolytic tank 38, and the water heating device 15 may be arranged in this order in the flow direction of the bath water. In these embodiments shown in FIGS. 1 and 2, since the electrolytic cell 38 capable of performing a sterilizing action is located close to the bath 10, the bath 10
It is possible to further reduce the number of bacteria and microorganisms contained in the bath water returning to and to more effectively suppress the generation of slime. Further, as shown in FIG. 3, the electrolytic cell 38, the microbial purification tank 40, the physical filtration tank 42, and the water heating device 15 may be arranged in this order in the flowing direction of the bath water. In the electrolytic cell 38, active oxygen (hydrogen peroxide) generated near the anode 66 by electrolysis has the ability to kill not only the bacteria contained in the bath water but also useful microorganisms that decompose organic substances. There is. Therefore, when the electrolytic cell 38 is arranged on the upstream side of the microbial purification tank 40 as shown in FIG. 3, the bath water containing the active oxygen flows into the microbial purification tank 40, and the useful microorganisms propagated and fixed on the PVA gel 74 are fixed. There is also concern that it will be destroyed.
Of course, since the life of active oxygen is extremely short, even in the case of the example shown in FIG. 3, there is no problem if the electrolytic cell 38 and the microbial purification tank 40 are properly separated.
However, as shown in FIGS. 1 and 2, if the microbial septic tank 40 is arranged upstream of the electrolytic bath 38, the microbial septic tank 40 and the electrolytic bath 38 can be installed very close to each other, and the entire apparatus can be installed. It can contribute to compactification.

In the electrolytic cell 38 shown in FIG. 2, the inflow side conduit 48 and the outflow side conduit 52 are indicated by a two-dot chain line conduit 49.
Alternatively, a part of the bath water may flow into the downstream physical filtration tank 42 without passing through the electrolytic tank 38. This is effective in reducing the distance between the electrodes in the electrolytic cell 38. That is, in the electrolytic bath 38, by narrowing the distance between the electrodes 66, 68, electrolysis of bath water can be more efficiently performed by applying a low voltage DC. According to this, it is possible to reduce the load on the DC power source, and there is no fear of an electric shock accident, so that safety is improved. However, on the other hand, there is a problem in that the flow path resistance of the bath water in the electrolytic cell 38 increases, and the load on the circulation pump 44 increases conversely. In such a case, if the bypass conduit 49 is provided on the inflow side to the electrolytic cell 38 as described above, the overall flow path resistance can be suppressed low, and in addition to reducing the load on the DC power supply, The load on the circulation pump 44 can also be reduced.

Further, in the physical filtration tank 42 shown in FIG. 3, the inflow side conduit 48 and the outflow side conduit 52 are bypassed by the conduit 51 so that a part of the bath water does not pass through the filtration tank 42. It may be configured to flow into the water heating device 15 on the downstream side. This is the filter 8 provided in the physical filtration tank 42.
This is a solution to the problem that when 2 becomes clogged with time and the water flow resistance increases, the amount of bath water flowing out from the filtration tank 42 decreases and the load on the circulation pump 44 increases. That is, if the bypass conduit 51 is provided on the inflow side to the physical filtration tank 42, the overall flow path resistance can be suppressed to a low level, so that a decrease in the amount of bath water returning to the bath 10 can be prevented, and At the same time, the load on the circulation pump 44 can be reduced.

(Regarding the first operation mode when two water heating devices are provided) When the water heating device 15 is provided with the two heating devices 17 and 19 described above, it is shown in FIGS. The first operation mode and the second operation mode shown in FIGS.
The operation mode can be selectively adopted. First,
Explaining the operation mode, for example, in the basic arrangement shown in FIG. 1, a first switching valve 43 is provided on the inlet side of the heat exchange pipe 13 in the first heating device 17, and the first switching valve 4 is provided.
The pipe line 33 (leading out from the outlet side of the heat exchange pipe 27) is connected to the first switching side of No. 3, and the pipe line 52 (leading out from the outlet port of the physical filtration tank 42) is connected to the second switching side. Has been done. Further, a second switching valve 55 is provided on the discharge side of the circulation pump 44, and the conduit 53 is provided on the first switching side of the second switching valve 55.
(Derived from the inlet side of the microbial septic tank 40) is connected.
Further, a pipe line 47 is led out from between the check valve 35 and the second closing / opening valve 37 inserted in the pipe line 33, and the pipe line 47 is connected to the second switching side of the second switching valve 55. There is.

FIG. 15 shows the normal operation mode, in which the first switching valve 43 is switched to the second switching side which communicates with the pipe line 52, and the second switching valve 55 communicates with the microorganism purification tank 40. Is switched to the first switching side. Therefore, the bath water is not circulated in the pipe line 47. Further, the second closing / opening valve 37 is closed, and communication with the tap water supply system 29 is cut off. If the circulation pump 44 is operated in this state, the bath water in the bathtub 10 circulates through the route of the microorganism purification tank 40 → electrolysis tank 38 → physical filtration tank 42 → first heating device 17 as described above, A suitable purification of the bath water is achieved. In the first heating device 17, the burner 11 is additionally fired at appropriate times according to the temperature of the bath water.

FIG. 16 shows a bypass mode in which bath water does not pass through each tank. The first switching valve 43 is switched to the first switching side communicating with the pipe 33, and the second switching valve 43 is connected to the second switching valve 43.
The switching valve 55 is switched to the second switching side that communicates with the pipe line 47. Therefore, the discharge side of the circulation pump 44 is cut off from the communication with the microbial septic tank 40, and
It is in communication with 7. The second open / close valve 37 is also closed, and the supply of tap water is cut off. When the circulation pump 44 is operated in this state, the bath water in the bathtub 10 flows through the pipe line 47 and the pipe line 33, and passes through the first switching valve 43 and the first heating device 17 (heat exchange pipe 13) to the bathtub. The cycle of returning to 10 is repeated. That is, depending on the state of the bath water, purification or filtration may not be required, and at this time, the bath water is bypassed to the microbial purification tank 40, the electrolysis tank 38, and the physical filtration tank 42 without being circulated. . As a case where this mode is required, it is assumed that the burner 11 of the first heating device 17 is ignited to only reheat the bath water.

FIG. 17 shows a filling mode when the bathtub 10 is filled with water. In this case, as in the case of the bypass mode described above, the first switching valve 43 is connected to the conduit 3
3, and the second switching valve 55 is switched to the side communicating with the pipe line 47. However, the circulation pump 44 is stopped, and the second closing / opening valve 37 is opened to communicate with the tap water supply system 29. If tap water is supplied from the tap water supply system 29 in this state, the tap water flows under pressure through the heat exchange pipe 27 of the second heating device 19, and on the other hand, the pipe line 47 → the second switching valve. 55 → circulation pump 44 → supplied to the bathtub 10 via the path of the water absorption hose 16 and, on the other hand, the pipe 33
→ first switching valve 43 → heat exchange tube 13 of first heating device 17 →
The water is supplied to the bathtub 10 via the path from the pipe 54 to the drain hose 18. That is, tap water is supplied in a form bypassing the microbial purification tank 40, the electrolytic tank 38, and the physical filtration tank 42. At this time, by igniting the burners 11 and 25 of the first heating device 17 and the second heating device 19, the heated tap water is supplied to the bathtub 10 to perform the filling of the water. The water heating device 15 may ignite only the burner of either the first heating device 17 or the second heating device 19.

(Regarding the Second Operation Mode when Two Water Heating Devices are Provided) Next, the second operation mode implemented by the configuration shown in FIGS. 18 and 19 will be described. This second
In view of the fact that the filter 82 provided in the physical filtration tank 42 becomes clogged with time, the operation mode is for supplying water from the direction opposite to the inflow direction of the bath water to wash the filter 82. Is. The tank arrangement and the pipeline system shown in FIG. 18 are basically the same as those of the structure described with reference to FIG. However, the first switching valve 43 is of a type that can switch between the side where the pipeline 52 communicates with the pipeline 33 and the side where the pipeline 52 communicates with the inlet side of the heat exchange tube 13,
Further, the second switching valve 55 and the pipe line 47 are removed. Further, the physical filtration tank 42 is provided with a drain 57 which is controlled to be opened and closed by an electromagnetic valve at an appropriate position, and a check valve 59 is provided in the pipe line 48 which connects the electrolysis tank 38 and the physical filtration tank 42.
Is inserted. This check valve 59 is used in the electrolytic cell 38.
To allow the flow of bath water from the physical filtration tank 42 to the physical filtration tank 42, but prevent the flow of water from the opposite direction.

In the normal operation mode shown in FIG. 18, the first switching valve 43 is switched to the side communicating with the conduit 52, and the second closing / opening valve 37 is closed, so that the tap water supply system 2 is closed.
Communication with 9 is broken. Further, the drain 57 is also closed. If the circulation pump 44 is operated in this state,
The bath water in the bathtub 10 is a microbial septic tank 40 → electrolytic tank 38.
-> Physical filtration tank 42-> It circulates through the path | route of the 1st heating apparatus 17, and suitable purification | cleaning of this bath water is achieved. In the first heating device 17, the burner 11 is timely depending on the temperature of the bath water.
Is ignited and fired.

FIG. 19 shows the backwash mode of the physical filtration tank 42. When the filter 82 loaded in the physical filtration tank 42 is clogged with time and the degree of clogging reaches a certain standard, this is detected by a required sensor and the operation of the circulation pump 44 is stopped. Then, the first switching valve 43
Is switched to the side communicating with the pipe 33, the second closing / opening valve 37 is opened to communicate with the tap water supply system 29, and the drain 57 is opened. As a result, tap water supply system 29
Tap water flows into the outflow side of the physical filtration tank 42 via the line 52 under pressure. That is, since tap water enters the physical filtration tank 42 from the opposite direction, the filter 82
Residual organic matter and other contaminants collected in the filter 82 are removed from the fine mesh of the filter 82 together with the water flow. The removed residual organic substances and pollutants are mixed with water and discharged from the drain 57 to the outside. Therefore, the filtering / collecting ability of the filter 82 is restored,
It is suitable for reuse.

[0051]

As described above, according to the circulation purification apparatus of the first aspect of the present application, the microorganism purification means decomposes the organic matter contained in the contaminated liquid by the microorganisms to purify the liquid. By energizing the electrolysis means, the contaminated liquid is electrolyzed, active oxygen is generated and sterilized, and at the same time, the organic matter in the contaminated liquid is oxidatively decomposed. The physical filtration means collects and filters sludge-like contaminated residues generated from decomposed organic substances and organic substances that have not been decomposed. These microbial purification means, electrolysis means and physical filtration means work together to sterilize contaminated liquids, decompose organic substances contained in the liquids, and filter contaminated residues and undecomposed organic substances. Clean cleaning is achieved. Moreover, since the liquid heating means by the burner combustor is provided, there is an advantage that the purified liquid can be heated as needed to easily raise the temperature. Further, according to the circulation purification apparatus of the second aspect of the present application, in the microbial purification tank, the microorganisms present in the granular synthetic polymer gel decompose the organic matter contained in the contaminated liquid to purify the liquid. By energizing the electrolytic cell, the contaminated liquid is electrolyzed, active oxygen is generated and sterilized, and the organic matter in the contaminated liquid is oxidatively decomposed. The physical filtration tank collects and filters sludge-like polluted residues produced from decomposed organic substances and organic substances that have not been decomposed. The electrolytic cell, the microbial purification tank, and the physical filtration tank work together to sterilize the contaminated liquid, decompose organic substances contained in the liquid, and filter contaminated residues and undecomposed organic substances to efficiently clean the contaminated liquid. Is achieved. Moreover, since the liquid heating device using the burner combustor is provided, there is also an advantage that the temperature can be easily raised by heating the liquid if necessary.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a basic configuration of a circulation purification device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic view of a circulation purification device according to another preferred embodiment of the present invention.

FIG. 3 is a schematic view of a circulation purification device according to still another preferred embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a schematic structure of a microbial septic tank.

FIG. 5 is a vertical sectional view showing a schematic structure of a physical filtration tank.

6 is a partial cross-sectional view showing a state in which a normally closed valve is provided in the filter of the physical filtration tank shown in FIG. 5, in which the valve body is closed by spring pressure.

7 is a partial cross-sectional view showing a state in which a normally closed valve is provided in the filter of the physical filtration tank shown in FIG. 5, and as a result of the water pressure pushing down the valve body against the spring pressure, the valve body is It is open.

FIG. 8 is a vertical cross-sectional view of a physical filtration tank in which a filter is divided into a coarse filter and a dense filter.

FIG. 9 is a vertical sectional view showing a schematic structure of an electrolytic cell.

FIG. 10 is a schematic perspective view showing a state in which the circulation purification device for polluted liquid according to the present application is installed in a bathroom.

FIG. 11 is a vertical cross-sectional view showing a water supply / drainage unit that constitutes a part of the circulation purification device in a state where the water supply / drainage unit is attached to the inner wall surface of the bath.

FIG. 12 is a flowchart showing a control flow of the circulation purification device.

FIG. 13 is a schematic diagram showing a control block that can individually control electrical components of the circulation purification device.

FIG. 14 is a flowchart showing a control flow for determining whether or not additional heating is performed when a bypass opening / closing valve is inserted in the water heating device.

FIG. 15 is a schematic explanatory diagram showing a mode in which a normal circulation purification operation is performed in a configuration including two heating devices as a water heating device.

16 is a schematic explanatory diagram showing a bypass mode in which bath water is circulated without passing through each tank for circulation purification in the configuration shown in FIG. 15. FIG.

FIG. 17 is a schematic explanatory view showing a filling mode in which the bath is filled without circulating purification in the configuration shown in FIG. 15.

FIG. 18 shows a configuration in which two heating devices are provided as water heating devices so that the physical filtration tank can be backwashed.
It is a schematic explanatory drawing which shows the mode which performs a normal circulation purification operation.

FIG. 19 is a schematic explanatory view showing a mode of performing backwashing of the physical filtration tank in the configuration shown in FIG.

[Explanation of symbols]

 10 Bathtub 11 Gas Combustor (Burner) 12 Bath Water 13 Heat Exchange Tube 14 Water Supply / Drainage Unit 15 Water Heating Device 16 Water Absorption Hose 17 First Heating Device 18 Drain Hose 19 Second Heating Device 20 Device Main Body 21 Bypass Pipe 22 Electric Leak Breaker 23 No. 1 Closed Open Valve 24 Cable 25 Burner 26 Ground Cable 27 Heat Exchange Tube 28 Suction Cup 29 Water Supply System 30 Box Case 31 Hot Water Supply System 32 Water Intake Port 33 Pipeline 34 Discharge Port 35 Check Valve 36 Filter 37 Second Closed Open Valve 38 Electrolysis Tank 39 Electrolysis tank drive circuit 40 Microbial purification tank 41 Blower 42 Physical filtration tank 43 First switching valve 44 Circulation pump 45 Pump drive circuit 46 Pipeline 47 Pipeline 48 Pipeline 49 Bypass pipe 50 Electric heating tank 51 Bypass pipe 52 Pipeline 53 Pipe line 54 Pipe line 55 Second switching valve 56 Flow rate sensor 57 Do Len 58 Temperature sensor 59 Check valve 60 Water level sensor 62 Control circuit 64 Box casing 66,68 Electrode portion 70 Cylindrical casing 70a Inlet 70b Outlet 72 Tubular water flow passage 74 Synthetic polymer gel (PVA gel) 76 Filter 78 Water retention Part 80 Cylindrical casing 80a Inlet 80b Outlet 82 Winding filter 84 Cylindrical core 84a Hollow part 84b Through hole 86 Linear material 88 Normally closed valve 89 Valve drive circuit 90 Compression spring 93 Burner drive circuit 94 Display 95 Display drive circuit 96 Ozonizer 97 Ozonizer drive circuit 98 Memory (RAM) 99 Solenoid valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication C02F 1/465 C02F 1/50 540A 1/50 510 550D 520 550L 531 560A 540 560B 550 560F 560H 560 560Z 1/78 3/10 A F24H 9/00 W B01D 35/02 J 1/78 C02F 1/46 101Z 3/10 102 E04H 4/12 E04H 3/20 B F24H 9/00

Claims (22)

[Claims] 1. A circulation purification device for a contaminated liquid, wherein a liquid contaminated with time is stored in a liquid storage means, and the contaminated liquid is circulated and pumped outside the storage means for purification and sterilization. A microbial purification means for decomposing and purifying organic matter contained in the contaminated liquid by microorganisms, an electrolysis means for electrolyzing the contaminated liquid to promote oxidative decomposition of the organic matter, and a contaminant contained in the contaminated liquid. A physical filtration means for collecting and filtering, and a liquid heating means including a burner combustor and a heat exchanger are provided, and the microbial purification means, the electrolysis means, the physical filtration means and the liquid heating means are connected to each other to circulate the contaminated liquid A circulating-purification device for contaminated liquid, characterized in that 2. A contaminated liquid circulation purifying apparatus which pumps up a contaminated liquid in a storage tank with a circulation pump to purify and sterilize the contaminated liquid, and then returns the contaminated liquid to the storage tank again. A microbial septic tank filled with a granular synthetic polymer gel in which microorganisms for adsorbing / decomposing the contained organic matter are present, an electrolytic cell for electrolyzing the contaminated liquid to accelerate the oxidative decomposition of the organic matter, and the contaminated liquid It is equipped with a physical filtration tank for collecting and filtering the pollutants contained in, and a liquid heating device equipped with a burner combustor and a heat exchanger, and connecting these microbial purification tank, electrolysis tank, physical filtration tank and liquid heating device. A circulation purification device for a contaminated liquid, characterized in that the circulation route for the contaminated liquid is constituted. 3. The circulating purifying apparatus for polluted liquid according to claim 2, wherein the filling amount of the synthetic polymer gel is adjusted so that the polluted liquid flowing into the microorganism purification tank can freely flow. 4. The circulating purification apparatus for contaminated liquid according to claim 2 or 3, wherein the synthetic polymer gel is entrapped with microorganisms that adsorb and decompose organic substances. 5. The microbial septic tank is provided with an inlet and an outlet for a contaminated liquid, and a mesh filter for preventing the granular synthetic polymer gel from flowing out is disposed in the inlet and the outlet. Item 5. A circulation purification device for contaminated liquid according to any one of items 2 to 4. 6. The circulation of the contaminated liquid according to claim 2, wherein the inflow path of the contaminated liquid to the physical filtration tank is provided with a bypass flow path that is connected to a downstream side while avoiding the physical filtration tank. Purification device. 7. The physical filtration tank is loaded with a winding filter, which is obtained by winding a linear material around a core having a large number of through holes in a hollow portion, as a filtering material, and the contaminated liquid flowing into the physical filtration tank is Mainly flows into the filter from the outer periphery, is filtered and then flows out through the through hole and the hollow portion of the core, and as the water flow resistance in the filter increases, without passing through the through hole of the filter and the core. 7. The contaminated liquid circulation purification apparatus according to claim 2, wherein the ratio of the contaminated liquid flowing out only from the hollow portion is also increased. 8. The winding core of the winding filter is provided with a valve element at one of its openings which constantly opens the opening with spring pressure, and as the filter becomes clogged, the resistance at the passage of liquid increases. The pressure of the contaminated liquid flowing into the physical filtration tank also gradually increases, and with this increase in pressure, the valve body gradually opens against the spring pressure, without passing through the through hole of the filter and the core. 8. The circulating purification apparatus for a contaminated liquid according to claim 7, wherein the ratio of the contaminated liquid flowing out from the opening only through the hollow core portion is increased. 9. The winding filter is divided so that the winding pitch of its linear material is coarse and dense, and the liquid passage resistance increases with the clogging of the filter over time. Claim 2 wherein the timing can be adjusted,
6. The circulating purification apparatus for contaminated liquid according to any one of 6, 7, and 8. 10. The circulation purification device for polluted liquid according to claim 2, wherein a bypass flow passage is provided in an inflow passage of the polluted liquid to the electrolytic bath so as to avoid the electrolytic bath and communicate with a downstream side. . 11. The electrolytic cell is provided with two electrode portions, one electrode portion functions as an anode and the other electrode portion functions as a cathode.
0. A circulating purification apparatus for polluted liquid according to any one of 0 to 5. 12. The two electrode parts in the electrolytic cell are
The polarities can be alternately switched according to the amount and time of passage of the contaminated liquid.
The circulating purification apparatus for polluted liquid according to any one of 1. 13. The circulating purification apparatus for contaminated liquid according to claim 2, wherein the liquid heating device is used for reheating the contaminated liquid. 14. The pollution according to claim 2, wherein the liquid heating device includes a first heating device for heating a contaminated liquid and a second heating device for heating tap water to supply the hot water to a hot water supply system. Liquid circulation purification device. 15. The contaminated liquid reheated by the first heating device is always circulated through the microbial purification tank, electrolysis tank and physical filtration tank, and if necessary, these microbial purification tank and electrolysis tank may be circulated. And is circulated by bypassing the physical filtration tank, and at the time of filling the storage tank with hot water, the tap water is heated by the second heating device and / or the first heating device,
The circulating purification apparatus for contaminated liquid according to claim 2, wherein the circulating purification device for contaminated liquid can be supplied to the storage tank as a contaminated liquid by bypassing the microorganism purification tank, the electrolytic tank, and the physical filtration tank. 16. The contaminated liquid reheated by the first heating device is always circulated through the microbial purification tank, the electrolysis tank and the physical filtration tank, and the filter loaded in the physical filtration tank changes with time. When the filter is clogged, the inflow path of the contaminated liquid in the physical filtration tank is blocked, the drain is opened, and tap water heated by the second heating device is supplied to the physical filtration tank from the opposite direction to the filter. 3. The circulating purification apparatus for contaminated liquid according to claim 2, wherein the hot water and the hot water after washing are discharged from the drain to the outside of the system. 17. The circulation purification apparatus for polluted liquid according to claim 2, wherein the microbial purification tank, the electrolysis tank, the physical filtration tank, and the liquid heating device are sequentially arranged in a direction in which the polluted liquid circulates. 18. The circulation purification device for polluted liquid according to claim 2, wherein the physical filtration tank, the microbial purification tank, the electrolysis tank, and the liquid heating device are sequentially arranged in a direction in which the polluted liquid circulates. 19. The circulation purification device for polluted liquid according to claim 2, wherein the electrolytic cell, the microbial purification tank, the physical filtration tank, and the liquid heating device are sequentially arranged in a direction in which the polluted liquid circulates. 20. A bypass pipe communicates each pipe system connected to the liquid inflow side and the liquid outflow side of the liquid heating device, and an opening / closing valve is arranged in the bypass pipe to prevent non-ignition of the burner combustor. When the burner combustor is ignited, the on / off valve is opened and the purified contaminated liquid is circulated through both the bypass pipe and the liquid heating device. 3. The contaminated liquid circulation purification apparatus according to claim 2, wherein the contaminated liquid is circulated only through the liquid heating device, and the circulation pump is switched to a low speed operation. 21. A bypass pipe is branched from a pipe line system connected to a liquid inflow side of the liquid heating device, the bypass pipe is connected to a pipe line system connected to a liquid outflow side of the liquid heating device, and the bypass is connected. A switching valve is provided at a branch portion of the pipe, and when the burner combustor is not ignited, the switching valve is switched to the bypass pipe side to allow purified contaminated liquid to flow only to the bypass pipe. When the combustor is ignited, the switching valve is switched to the liquid inflow pipe side of the liquid heating device so that the purified contaminated liquid is circulated only to the liquid heating device and the circulation pump is switched to low speed operation. The circulating purification apparatus for polluted liquid according to claim 2. 22. An apparatus for circulating and purifying a contaminated liquid according to claim 2, wherein an ozone generator is disposed at an appropriate position in a contaminated liquid circulation path that connects the microbial purification tank, the electrolytic cell, and the physical filtration tank.