JP2001208428A - Hot water supply bath device provided with purifying function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the bad electrolysis caused by an electrode coming out of the liquid level, and also to stabilize the cohesive action by the electrode. SOLUTION: Hydrogen gas which arises and stays when electrolyzed by cohesion means 13 provided on upper side within a filtering means 12 is displaced and discharged, using a sub bypass pipe 21 connected to the top of the filtering means 12, by injecting the hot water supplied from a hot water heating means 14 or a bathtub 10 from the top of the filtering means 12. Hereby, the electrolysis can be performed stably without the electrode coming out of the liquid level, and the purifying performance is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply bath apparatus having a purifying function for purifying bath water for business use or home use.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional filtering apparatus of this type aggregates a suspended substance containing water and aggregates the suspended substance, and filters the enlarged suspended substance. There is a filter provided with a filtration unit and a water temperature control unit, and has a quick and stable filtration performance by filtering and separating a suspended substance contained in water in a short time (for example, Japanese Patent Application Laid-Open No. H8-11773).
No. 7).

In FIG. 1, reference numeral 1 denotes a pump which circulates hot water in a bathtub 2 through a flow path 3. Reference numeral 4 denotes a hydrogen ion concentration adjusting means provided in the flow path 3. Reference numeral 5 denotes an aggregating means for eluting aluminum ions and aggregating suspended substances in water, and is provided in the channel 3. Reference numeral 6 denotes a filtering means for filtering the aggregated suspended substance, and is provided with a filter medium 7 and a filter medium support plate 8 therein. Reference numeral 9 denotes an ultraviolet lamp serving as a sterilizing unit, and reference numeral 10 denotes an electric heater serving as a heating unit.
Reference numeral 11 denotes an arrow indicating the flow of hot water.

In this apparatus, water in a bath 2 kept at a constant temperature by an electric heater 10 is sent by a pump 1 through a flow path 3 and a hydrogen ion concentration adjusting means 4 to a flocculating means 5. At this time, aluminum ions are added in the aggregation means 4, and aluminum hydroxide is generated. Aluminum hydroxide is electrically positively charged, and electrically adsorbs to electrically negatively charged bacteria and suspended substances in hot water, whereby the suspended substance is enlarged. The large-sized suspended substance is supplied to the filter medium 7 filled in the filtration means 6.
And sterilized by the ultraviolet lamp 9 and returned to the bathtub 2.

[0005]

However, in the configuration of the water purifying apparatus as described above, hydrogen gas and oxygen gas are generated during the electrolysis of the aggregating means and accumulate in the aggregating means. An electrode for coagulating the suspended substance is built in the coagulation means, and the generated gas lowers the liquid level in the coagulation means,
The electrode may be exposed to the gas layer from below the liquid level.

[0006] Electrolysis cannot be performed at the electrode portion exposed from the liquid surface to the gas layer, and the electrolysis area is substantially reduced. When the electrolysis is performed at a constant current, the required electrolysis voltage increases or the electrolysis takes place. When the power supply voltage is exceeded, there is a problem that the electrolytic current value of the molten metal decreases and the purification performance due to coagulation decreases. The same can be considered for the case where the aggregating means is incorporated in the filtering means.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a circulating circuit for circulating bath water, a circulating pump provided in the circulating circuit, and a method for electrolyzing molten metal provided in the circulating circuit. Aggregating means for producing a metal hydrate and aggregating suspended substances contained in the bath water, a filtering means provided in a circulation circuit for physically filtering the aggregated suspended substances, and a filtration means connected to the circulation circuit A bypass circuit that bypasses the upstream side and the downstream side of the filter, a sub-bypass circuit that connects the upper part of the filtering means and the bypass circuit, and a hot water supply heating means that is connected to the circulation circuit. At the same time, the gas generated during the electrolysis is filtered by injecting the hot water supplied from the hot water supply heating means from the upper part of the filtering means or by operating the circulation pump to inject the circulating bath water from the upper part of the filtering means. Is obtained so as to replace discharged into tub from the means upward through the sub-bypass circuit and bypass circuit.

According to the above invention, when the hot water supplied from the hot water supply heating means or the bath water circulated by the circulation pump is injected from above the filtering means, the gas generated during the electrolysis is filtered in the filtering means. It is extruded from above the means into the sub-bypass circuit and the bypass pipe in order, and further discharged into the bathtub through the circulation circuit.

That is, by injecting water from above the filtration tank in accordance with the amount of electrolysis of the aggregating means, the electrolysis can be stably continued without the electrodes rising from the liquid level.

In addition, the electrode can always be immersed below the liquid level, and the adhesion of an oxide film to the electrode can be prevented.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A hot water supply bath with a purifying function according to claim 1 of the present invention comprises a circulation circuit for circulating bath water, a circulation pump provided in the circulation circuit, and a molten metal provided in the circulation circuit. Aggregating means for generating metal hydrates by electrolysis and aggregating suspended substances contained in bath water; filtering means for physically filtering the agglomerated suspended substances provided in the circulation circuit; A bypass circuit that is connected and bypasses the upstream and downstream sides of the filtration means, a sub-bypass circuit that connects the upper part of the filtration means and the bypass circuit, and a hot water supply heating means that is connected to the circulation circuit; In addition to being provided on the upper side, by injecting hot water supplied from the hot water supply heating means from the upper part of the filtering means, gas generated at the time of electrolysis is passed from above the filtering means through the sub-bypass circuit and the bypass circuit. It is intended to replace discharged to the tank.

Then, when water is injected from above the filtering means,
In the filtering means, the gas generated during the electrolysis is pushed out from the upper part of the filtering means to the sub-bypass circuit and the bypass pipe in order due to the difference in specific gravity. Is done.

In other words, by injecting water with the water supply means according to the amount of electrolysis of the aggregating means, it is possible to prevent the electrodes from being exposed from the liquid surface to the gas layer, and the electrolysis can be stably continued. Therefore, the aggregation effect is stabilized, and the purification performance is stabilized.

According to a second aspect of the present invention, there is provided a hot water supply bath apparatus having a purifying function, wherein a circulation circuit for circulating bath water, a circulation pump provided in the circulation circuit, and a molten metal provided in the circulation circuit for electrolyzing molten metal. Aggregating means for producing a metal hydrate and aggregating suspended substances contained in the bath water, a filtering means provided in a circulation circuit for physically filtering the aggregated suspended substances, and a filtration means connected to the circulation circuit A bypass circuit that bypasses the upstream side and the downstream side of the filter, a sub-bypass circuit that connects the upper part of the filtering means and the bypass circuit, and a hot water supply heating means that is connected to the circulation circuit. At the same time, the circulating pump is operated to inject bath water from the upper part of the filtering means, so that gas generated during electrolysis is replaced and discharged from above the filtering means to the bath tub via the sub-bypass circuit and the bypass circuit. It is obtained by way.

When the bath water circulated by the circulating pump is injected from above the filtering means, the gas generated during the electrolysis in the filtering means, due to the specific gravity difference, flows from above the filtering means to the sub-bypass circuit and the bypass pipe in order. The water is pushed out, the inside of the filtering means is filled with bath water, and the generated gas is discharged to the bath tub through the circulation circuit.

In other words, by injecting water with the water supply means according to the amount of electrolysis of the coagulation means, it is possible to prevent the electrodes from being exposed to the gas layer from below the liquid surface, and to stably continue electrolysis. Therefore, the aggregation effect is stabilized, and the purification performance is stabilized.

According to a third aspect of the present invention, in the hot water supply bath apparatus having a purifying function, when the electrolysis time in the aggregating means reaches a predetermined time, the degassing operation of the filtering means is performed.

When the electrolysis time is carried out for a predetermined time, a gas corresponding to the electric time is generated and stays in the upper part of the filtering means, but after a predetermined time, water is automatically injected from above the filtering means. By doing so, the gas generated during the electrolysis is pushed out of the sub-bypass circuit connected above the filtering means to the bathtub via the bypass circuit. Therefore,
Electrolysis is stably continued without the electrodes being exposed to the gas layer from below the liquid level.

A hot water supply bath with a purifying function according to a fourth aspect of the present invention is provided with gas detecting means for detecting the amount of gas generated by detecting the voltage or current at the time of electrolysis.

When electrolysis is performed using a constant current circuit, when the electrode rises above the liquid level, the electrode area usable for electrolysis decreases, and the electrolysis voltage rises. When electrolysis is performed using a constant voltage circuit,
When the electrode is exposed to the gas layer from below the liquid level, the electrode area available for electrolysis is reduced, and the electrolytic current is reduced. That is, by detecting a change in voltage or current during electrolysis, it is possible to detect a state in which the electrode is exposed to the gas layer from below the liquid level.

When it is detected that the electrode has risen above the liquid level, a gas venting operation is performed, and the amount of molten metal dissolved can be stabilized by reliably positioning the electrode below the liquid level.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a hot water supply bath apparatus having a purifying function according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 9 denotes a circulation pump which is a forced circulation means for circulating water in a bathtub 10, and reference numeral 11 denotes a circulation circuit. Reference numeral 12 denotes a filtering means provided in the circulation circuit 11, which supports a cylindrical casing 12a, a granular filter medium 12b mainly containing alumina, having a specific gravity of 3 to 4, and a granular filter medium 12b. It is composed of a filter bed 12c, an upper lid 12d and a lower lid 12e that connect circulation circuits 11 provided above and below the housing 12a, respectively.

Numeral 13 denotes an aggregating means for generating a metal hydrate by electrolysis and aggregating suspended substances contained in the bath water. The aggregating means 13 is provided with an anode 13a made of aluminum and a predetermined gap facing the anode 13a. And a power supply 13c for applying a voltage between the anode 13a and the cathode 13b and supplying a constant current. The aggregating means 13 is provided above the inside of the filtering means 12 so that the cathode 13b and the housing 12a form a predetermined gap.
The anode 13a, the cathode 13b, and the housing 12a each have a circular cross section and are provided concentrically.

Numeral 14 denotes a hot water supply heating means provided in the circulation circuit 11 for keeping and reheating the circulating water, pouring the water into the bathtub 10, supplying hot water at the time of back washing of the filtering means 12, and supplying water at the time of air purging. , A burner 14a, a heat exchanger 14b, a two-way pouring valve 14c, a flow control valve 14d, a check valve 14e, and a hot water supply pipe 14g including a thermistor 14f for detecting a pouring temperature.
It is composed of The hot water supply pipe 14g is connected to the circulation pump 9
Is connected to the circulation circuit 11 on the discharge side.

Reference numeral 15 denotes a circulating two-way valve provided between the position where the hot water supply pipe 14g is connected to the circulation circuit 11 and the discharge side of the circulation pump 9. Reference numerals 16 and 17 denote a water level sensor provided in the circulation circuit 11 between the circulation two-way valve 15 and the bathtub 10 for detecting a bathtub water level, and a thermistor for detecting the temperature of hot water in the bathtub 10.

Reference numeral 18 denotes a first flow path switching valve (electrically operated three-way valve), which is the outlet side of the circulation pump 9, the upper side of the filtration means 12,
It is provided so as to be connected to the bypass pipe 19. 20
Is a second flow path switching valve (electrically operated three-way valve),
2 is connected to the bypass pipe 19 on the downstream side of the bathtub 10. In addition, the bypass pipe 19 is the first flow path switching valve 1
8. A circulation circuit is formed which can switch the second flow path switching valve 20 to bypass the filtering means 12, and can supply hot water to the filtering means 12 and the bathtub 10 from below the filtering means 12. .

Reference numeral 21 denotes a sub-bypass pipe connecting the upper lid 12d of the filtering means 12 and the bypass pipe 19;
A check valve 22 is provided so as to flow in one direction from the upper part 2 to the bypass pipe 19.

Reference numeral 23 denotes a drain pipe connecting the upper side of the filtering means 12 and the downstream side of the second flow path switching valve 20, and a drain two-way valve 24 is provided.

25 is a circulation pump 9, a first flow path switching valve 1
8, second flow path switching valve 20, circulation two-way valve 15, drainage two-way valve 22, flow control valve 14d, pouring two-way valve 14c, operation of burner 14a, power supply 13c of aggregating means 13, water level sensor 16 , The thermistor 14f, the thermistor 17 and the like, and controls the operations of filtration, backwashing, hot water filling, hot water, additional heating, heat retention, and air purging.

Next, the operations and actions of the bath fully automatic operation will be described with reference to FIGS.

When an automatic bath operation (operation for automatically performing hot water, boiling and reheating operations) is performed in a state where the drain plug of the bathtub 10 is closed, an air purge operation for discharging air from the filtering means 12 is performed. The backwashing operation of the filtering means 12 is first performed continuously.

That is, in response to an operation instruction from the controller 25, the circulation two-way valve 15 is closed, and the first flow path switching valve 18 is brought into a state in which the bypass pipe 19 and the hot water supply heating means 14 are communicated. The two-way drainage valve 24 is switched from closed to open, with the valve 20 communicating the bypass pipe 19 and the filtering means 12.

In this state, the operation of opening the pouring two-way valve 14c for about one second and closing it for several seconds is performed.
g passed through the bypass pipe 19 and the filtration means 1
2 flows from below. The flowing water passes through the filter bed 12c and starts passing through the filter medium layer formed by the granular filter medium 12b, the water level in the filter means 12 rises gradually, and the inside of the filter means 12 is filled with water.

In this way, even if the filter medium layer formed of the granular filter medium 12b is in a relatively hardened state, the intermittent flow of water causes impact on the filter medium layer several times due to water pressure, A water path is formed in the filter medium layer, and the granular path materials 12b are separated.

Further, even if the particulate filter medium 31b may be temporarily wound up by the water flow, it will settle down by its own weight as soon as the flow stops. In addition, air remains near the filter medium layer formed by the granular filter medium 12b and the filter bed 12c,
Even if the bubbles rise as bubbles, the flow is intermittent, the bubbles are separated from the particulate filter medium 12b, and only the bubbles rise upward.

Therefore, the particulate filter medium 12b is not discharged from the filter means 12 to the outside. During this operation, the water flowing into the filtration means 12 passes through the drainage two-way valve 24 and is discharged to the outside from the drainage pipe 23.

Thereafter, when the number of opening / closing operations of the pouring two-way valve 14c reaches a predetermined number, the pouring two-way valve 14c is opened, and the amount of hot water is set to a predetermined value by the flow control valve 14d, and the thermistor 14 is turned on.
f, The water temperature is adjusted to about 50 ° C. by the burner 14a, and the process proceeds to the backwashing operation of the filtration means 12.

The filtration means is a favorable environment for bacteria to grow, because the filtration means supplements dirt in the bath water which becomes a nutrient such as bacteria at the same time as bacteria during filtration. It is difficult to achieve zero, and bacterial growth may progress during standing. Also, metabolites generated during the process of growing bacteria increase.

Therefore, the inside of the filtering means 12 is washed beforehand so that the dirt increased inside the filtering means 12 is not returned to the bath 10 from below the filtering means 12. The wastewater used for washing is discharged to the outside through the drainpipe 23.

When a predetermined time has elapsed for the backwashing operation, the two-way pouring valve 14c is closed, and the second flow switching valve 18 is brought into a state in which the bypass pipe 19 and the circulation pump 9 are communicated with each other. The circulation two-way valve 15 is switched to the open state with the flow path switching valve 20 communicating the bypass pipe 19 and the bathtub 10, and the backwashing operation ends.

Next, when the backwashing operation is completed, the operation proceeds to the filling operation. By the operation instruction of the controller 23, the circulation two-way valve 15 is changed from the open state to the closed state, the drainage two-way valve 22 is changed from the open state to the closed state, and the second flow path switching valve 20 communicates the bypass pipe 19 and the bathtub 10. Each can be switched. Thereafter, when the pouring two-way valve 14c is opened, the burner 14a is burned, and the hot water heated by the heat exchanger 14b starts flowing through the hot water supply pipe 14g.

Thereafter, the circulation circuit 11 via the circulation two-way valve 15 and the circulation pump 9 and the circulation circuit 11 via the first passage switching valve 18, the bypass pipe 19 and the second passage switching valve 20.
Are supplied to the bathtub 10 from two directions.

To detect the water level and hot water temperature in the bathtub 29, the two-way pouring valve 14c is closed and the circulating pump 9 is operated to completely discharge the air in the circulating circuit 11 into the bathtub. After that, the circulation pump 9 is stopped, the circulation two-way valve 15 is closed, and the water level in the bathtub 10 is checked by the water level sensor 17.

After the water level is confirmed, if the water level is lower than the set water level, the filling operation is performed again. The temperature of hot water flowing through the inside of the
To check the water temperature.

Further, after checking the water temperature, if the temperature is lower than the set water temperature, the burner 14a is burned while the circulation pump 9 is operated, the heat is received by the heat exchanger 14b, and the water in the bathtub 10 is additionally heated. When the set water temperature is reached, burner 1
The combustion of 4a and the operation of the circulation pump 9 are stopped.

When the filling operation is completed, the coagulation operation is performed next.
The degassing operation and the filtering operation are continuously performed. Agglomeration,
The operation and action of degassing and filtering will be described with reference to FIGS.

In response to an operation instruction from the controller 25, the drainage two-way valve 22 is closed, the first flow path switching valve 18 is in communication with the bypass pipe 19 and the hot water supply pipe 14d, and the second flow path switching valve 20 is turned on. The state is switched to a state in which the lower side of the filtering means 12 is closed. Further power 13c is ON, a constant current is controlled so as flowing between a cathode 13b made of an anode 13a and stainless made of aluminum, the predetermined time t ₁
Electrolyzed. In this case, aluminum is dissolved from the anode 13a and aluminum ions are eluted in water.

This aluminum ion chemically reacts with a hydroxyl group (OH ⁻ ) in the water to be present in the water as aluminum hydroxide which is electrically positively charged. At this time, hydrogen H ₂ is generated from the anode 13 a and accumulates above the filtering means 12.

In this coagulation operation, the circulation two-way valve 15 is closed, the water level sensor 17 detects the bathtub water level, the circulation two-way valve 15 is opened, and the circulation pump 9 circulates the bathwater. Sensing the bath tub temperature is being performed simultaneously.

At this time, if the water level is lower than the set water level, the hot water is added. If the water temperature is lower than the set water temperature, additional heating is performed.

Thereafter, when the electrolysis time reaches a predetermined time t ₁ , the operation shifts to a degassing operation. At this time, control is performed such that when the temperature of the hot water has not reached the set temperature, gas is released using a circulating pump.

First, a method for degassing when the water level is equal to or lower than the set water level will be described. Controller 25
, The circulation two-way valve is closed, the drainage two-way valve 24 is closed, and the first flow path switching valve 18 is connected to the filtration means 12 and the hot water supply pipe 14.
The second flow path switching valve 20 closes the lower side of the filtration means 12 and switches to a state where the bypass pipe 19 and the bathtub 10 communicate with each other so that the d side is communicated. Reference numeral 27 denotes a solid arrow indicating the flow of water when degassing is performed using the hot water supply heating unit 14.

The degree of opening of the flow control valve 14d is adjusted so that a flow necessary for the degassing operation flows, and the burner 14d is controlled so that the tap water temperature becomes the bath water keeping temperature.
The combustion amount of a is adjusted. Incidentally, pouring the two-way valve 14c is only open a predetermined time t _2, and then closed.

Next, a method of degassing when the temperature is equal to or lower than the set temperature will be described. Controller 25
, The circulation two-way valve is opened, the drainage two-way valve 24 is closed, and the first flow path switching valve 18 is connected to the filtering means 12 and the hot water supply pipe 14.
The second flow path switching valve 20 closes the lower side of the filtering means 12 in a state where the d side is communicated, and is switched to a state in which the bypass pipe 19 and the bathtub 10 are communicated, and the circulation pump 9 is operated.

The circulating pump 9 operates for a predetermined time t ₂ and then stops. The combustion of burners 14a is stopped when the bath water is increased to a predetermined temperature in within the predetermined time t _2, if the predetermined time t _2, and stops regardless bath water temperature. Reference numeral 28 is a broken line arrow indicating the flow of water when gas is released using the circulation pump 9.

When the temperature is at the set temperature and the set water level, the burner 14a is not burned and the circulating pump 9 is turned off.
Degassing is performed by a method using

As described above, by performing such a degassing operation, the hot water supplied from the hot water supply means or the bath water circulated by the circulation pump 9 is poured from above the filtration means, and is supplied from above the filtration means. The gas generated and retained during the electrolysis is discharged from the sub-bypass pipe 21 connected to the upper part of the filtering means 12 due to the difference in specific gravity and is replaced with hot water.
Further, the replaced gas is discharged from the bypass pipe 19 to the bathtub 10.

By performing this operation, the filtering means 12
The inside is filled with hot water again, and the bathtub temperature and the bathtub water level approach the set states.

Next, the operation and operation at the time of filtration will be described. In response to an operation instruction from the controller 25, the drainage two-way valve 24 is closed, the circulation two-way valve 15 is opened, and the first flow path switching valve 18 is connected to the filtration means 12 and the circulation pump 9 side. The path switching valve 20 is switched to a state in which the filtration means 12 and the bathtub 10 are communicated, and the circulation pump 9 is operated.

In this case, suspended substances electrically negatively charged such as dirt and bacteria contained in the bath water flow from the bathtub 10 into the filtering means 12.

The positively charged aluminum hydroxide generated by the electrolysis stays in the filtration means 12 and is mixed and agitated in the filtration means 12 by the inflow of the suspended matter, and Agglomerated flocs of the neutralized suspended matter are formed. The inventors have confirmed that the particle size of the aggregated floc is several tens to several hundreds μm.

In this way, the flocculated floc is separated by filtration in the filter medium layer composed of the particulate filter medium 12b having a particle diameter of 0.3 to 0.5 mm filled in the filter means 12. That is, the suspended matter contained in the bath water is removed and returned to the bathtub 10.

When the filtering operation is performed for a predetermined time t ₃ , the operation returns to the aggregation operation.

The degassing operation is controlled so as to automatically shift when electrolysis is performed for a predetermined time t _1. However, if air is accumulated or degassing does not go well, the anode degassing operation is stopped. When the cathode 13a and the cathode 13b rise from the liquid level, the electrolysis voltage at the power supply 13c rises. With this configuration, the gas generation detecting means 2 built in the controller 25
The electrolysis is stopped by 6 to perform a degassing operation, so that the liquid is reliably immersed below the liquid level.

Further, the coagulation operation is performed such that the coagulation operation is completed and the electrolysis is not performed if the total electrolysis time has elapsed t _4, and if the predetermined time t _{5 has} elapsed after completion of the filling, the heat retention / addition hot water and filtration are performed. The operation is controlled to end.

When the power of the hot water supply bath is turned on and the fully automatic operation is released, the reheating and adding hot water operation is not performed.

When the filtration operation is continued, dirt such as flocculated floc is accumulated from the upper layer to the middle layer of the filter medium layer formed by the particulate filter medium 12b inside the filter means 12 after the filtration operation. It is necessary to perform a backwashing operation to wash the inside of the cleaning device 12.

The backwashing operation is performed for a predetermined time t ₆ from the end of the hot water filling.
Is controlled so that it is automatically performed when the time elapses. The backwashing operation is as described above, and is omitted.

As described above, this embodiment has the following effects.

At the start of the collecting operation, the water level of the bath water is detected and the temperature of the hot water is checked, and the fully automatic operation of reheating and adding hot water is performed, so that the maximum filtering time can be reached within a limited time. it can. Therefore, the purification performance is improved.

Based on the water level and hot water temperature detection results during the coagulation operation, the hot water and additional heating operations can be performed at the time of degassing.

By performing a backwash operation prior to filling with hot water,
It is possible to prevent the contamination due to the bacterial growth in the filtration means accompanying the standing after the filtration means backwashing from returning to the bathtub.

When the granular filter medium is composed of alumina having a large specific gravity, the outflow of the granular filter medium can be reduced, and the particle size of the granular filter medium can be made relatively small, so that the filtering performance can be improved.

By supplying hot water from the hot water supply heating unit to the filtering means, the washing efficiency of the filtering means is improved.

[0077]

As is clear from the above description, according to the present invention, the following effects can be obtained.

In the hot-water supply bath apparatus with a purifying function according to the first aspect of the present invention, the gas generated during the electrolysis is replaced and discharged by pouring water from above the filtering means, and the electrode is prevented from coming out of the liquid surface. it can. Therefore, the electrolysis is stable, the coagulation effect is reliably obtained, and the purification performance can be secured. Also, at the same time as the degassing operation, the level of the bath water can be detected and the operation of adding hot water can be performed by hot water supply heating means.

Further, in the hot water supply bath apparatus with a purifying function according to claim 2 of the present invention, the bath water circulated by the circulating pump is injected from above the filtering means, thereby replacing and discharging the gas generated during the electrolysis, and Can be prevented from rising above the liquid level. Therefore, the electrolysis is stable, the coagulation effect is reliably obtained, and the purification performance can be secured. Further, the degassing operation can be performed without changing the bathtub water level, and the reheating operation of the bathwater can be performed at the time of degassing.

Further, in the hot water bath apparatus with a purifying function according to claim 3 of the present invention, the water is automatically injected from above the filter means when the electrolysis operation has passed for a predetermined time, so that the electrolyzer is operated from above the filter means. Can be replaced and discharged. That is, it is possible to maintain a state in which the electrode is immersed below the liquid surface, and it is possible to stabilize the coagulation action by electrolysis.

Further, the hot water supply bath apparatus with a purifying function according to the fourth aspect of the present invention can grasp the positional relationship between the electrode and the liquid level by detecting a voltage change during electrolysis. Even if the liquid level rises above the liquid level, it is possible to ensure that the liquid is immersed beneath the liquid level by performing the degassing operation, thereby stabilizing the coagulation action by electrolysis.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply bath apparatus with a purification function according to a first embodiment of the present invention.

FIG. 2 is a sequence diagram showing a state from a hot water filling operation to a backwashing operation of the apparatus.

FIG. 3 is a schematic configuration diagram of a conventional water purification device.

[Explanation of symbols]

 Reference Signs List 9 circulation pump 11 circulation circuit 12 filtration means 12b granular filter medium 13 coagulation means 13a anode 13b cathode 13c power supply 14 hot water supply heating means 15 circulation two-way valve 18 first flow path switching valve (electric three-way valve) 19 bypass pipe 20 second Flow path switching valve (electrically operated three-way valve) 21 Sub-bypass pipe 26 Gas generation detection means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3L024 CC02 CC10 DD02 DD17 DD19 DD21 DD27 DD32 GG05 GG06 GG07 GG12 GG38 GG41 HH13 HH26 HH42 HH45 4D061 DA07 DB15 EA06 EB27 EB28 EB37 EB39 FA01 FA13 FA20 GA04 GA09 GC04 4D064 AA11 BF32 BF33 BF34 BF36 BF40

Claims (4)

[Claims] A circulating circuit for circulating bath water, a circulating pump provided in the circulating circuit, and a metal hydrate formed by electrolyzing molten metal provided in the circulating circuit and contained in the bath water. An aggregating means for aggregating the suspended substance, a filtering means for physically filtering the suspended substance, a bypass circuit connected to the circulation circuit and bypassing the upstream and downstream sides of the filtering means, and an upper part of the filtering means And a sub-bypass circuit connecting the bypass circuit, and hot water supply heating means connected to the circulation circuit, wherein the aggregating means is provided on the upper inside of the filtration means, and the hot water supplied from the hot water supply heating means is With a purifying function for injecting gas generated during electrolysis from the upper part of the filtering means and replacing and discharging the gas generated from the upper part of the filtering means to the bathtub through the sub-bypass circuit and the bypass circuit. Hot water bath equipment. 2. A circulating circuit for circulating bath water, a circulating pump provided in the circulating circuit, and a metal hydrate formed by electrolyzing molten metal provided in the circulating circuit and contained in the bath water. An aggregating means for aggregating the suspended substance, a filtering means for physically filtering the suspended substance, a bypass circuit connected to the circulation circuit and bypassing the upstream and downstream sides of the filtering means, and an upper part of the filtering means And a sub-bypass circuit connecting the bypass circuit, and a hot water supply heating means connected to the circulation circuit.The flocculation means is provided inside the filtration means, and the circulation pump is operated to supply bath water. With a purifying function of injecting gas generated at the time of electrolysis by injecting from the upper part of the filtering means, and replacing and discharging the gas generated from the electrolysis means from above the filtering means to the bathtub through the sub bypass circuit and the bypass circuit. Hot water bath equipment. 3. The hot-water supply bath with a purifying function according to claim 1, wherein the degassing operation of the filtering means is performed when the electrolysis time in the aggregating means reaches a predetermined time. 4. The hot-water supply bath with a purifying function according to claim 1, further comprising gas detection means for detecting a generated gas amount by detecting a voltage or a current at the time of electrolysis.