JPH09323093A - Hot water circulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a hot water circulator capable of sterilizing useless bacteria. SOLUTION: A ceramic heater 40 is arranged outside the inner cylinder 32 of the purification cylinder 30 of this hot water circulator 10. The bathwater introduced into the inner cylinder 32 is heated in the inner cylinder 32. The bathwater is heated by the ceramic heater 40 to 45 deg.C, hence the various germs such as Staphylococcus and Escheichia coli are sterilized, however the Bacillus Subtilis ATCC 6603 depositing on a granular ceramic 40 in the inner cylinder 32 are still alive. Consequently, the various germs are surely sterilized without lowering the org. matter decomposing and purifying effect of the Bacillus Subtilits ATCC 6603, and the water in the bath 12 is always kept clean.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water circulator that takes in bath water in a bathtub, purifies it, and then returns it back into the bathtub.

[0002]

2. Description of the Related Art In recent years, hot water circulators, which purify hot water in a bathtub by the action of a filtering material and microorganisms, return the bathwater to the bathtub, and are always used, have been used at home.

[0003] The hot water circulator uses a pump to remove bath water from a water intake section arranged in a bath tub, from which relatively large debris such as hair, towel lint, and a portion of reds have been removed through a pre-filter. The collected bath water is passed through a sterilizer to sterilize bacteria in the bath water, and further passed through a filtration tank to adsorb ammonia, red, and fats in the bath water, and to decompose organic substances by the action of microorganisms, thereby purifying the bath. The water is heated to a required temperature by a heater and then returned to the bathtub through the discharge section. Thereby, the bath water is purified and heated without changing the bath water every day, so that the bath can be taken at any time for 24 hours, and the bath can be used very conveniently and water is saved.

[0004] The mechanism of purification of water quality of the hot water circulator is as follows. That is, coarse dust such as hair is filtered by a prefilter (for example, a hair catcher) made of urethane foam or the like.

[0005] Further, bacteria derived from the human body taking a bath are sterilized by a sterilizer that sterilizes with ultraviolet rays, ozone and the like.

[0006] In addition, organic substances (for example, amino acids and proteins contained in body fluids or keratinized skin etc.) secreted from the body in the bath water are decomposed in the filtration tank and continuously purified.

Here, the principle of purifying organic matter secreted from the body in a filtration tank will be described below. That is, the filter tank contains a natural stone such as barley stone, or a filter medium such as a granular ceramic obtained by pulverizing such a natural stone and sintering it in a porous state. When bath water is circulated in the filtration tank, organic substances are adsorbed on the filter medium, and microorganisms propagate. Then, the purified microorganisms, which are the propagated microorganisms, decompose organic substances such as ammonia and proteins contained in the bath water, so that the bath water is purified.

[0008]

However, in the above-mentioned conventional hot water circulator, the microorganisms that propagate in the filtration tank are not only purified bacteria but also bacteria and the like in the bath water that could not be sterilized by the sterilizer. In some cases. In such a case, bath water mixed with various bacteria comes out from the filtration tank and is circulated into the bath tub.

In consideration of the above facts, an object of the present invention is to obtain a hot water circulator capable of sterilizing unnecessary germs.

[0010]

A hot water circulator according to claim 1, wherein the hot water circulator is arranged in a bathtub and takes in bath water from the bathtub, and the bath arranged in the bathtub and taken by the water intake portion. A discharge part for discharging water into the bath, and a heat-resistant purifying bacterium capable of decomposing organic substances contained in the bath water inside the discharge part. The discharge part is installed between the water intake part and the discharge part. A purification device for purifying the taken bath water, and a heater for heating the bath water to a predetermined temperature at which the purifying bacteria can live and other bacteria other than the purifying bacteria can be sterilized.

According to the warm water circulator having the above-mentioned structure, when the bath water in the bathtub is taken in by the water intake portion and fed into the purifying device, the organic matter contained in the bath water (for example, keratinized skin) And amino acids contained in body fluids) are decomposed and purified by purification bacteria in the purification device. The purified bath water is returned from the discharge part into the bath and used again.

The hot water circulator is equipped with a heater so that when the bath water is circulated and purified, or when the bath water is drained, the bath water taken from the water intake portion is removed by the heater except the purified bacteria. It is heated to a predetermined temperature at which germs such as Staphylococcus and Escherichia coli can be sterilized. As a result, miscellaneous bacteria other than the above-mentioned purified bacteria are heat-sterilized. Further, in this case, since the heating temperature of the heater is set to a temperature at which the above-described purification bacteria can inhabit, the purification bacteria in the purification device will not be sterilized even if the bacteria are sterilized by heating. The bath water can always be kept clean without impairing the water purification effect, that is, the effect of decomposing organic substances by the purification bacteria.

A hot water circulator according to a second aspect is the hot water circulator according to the first aspect, wherein the heater is provided in the purifying device.

According to the hot water circulator having the above structure, the heater is provided in the purifying device, and the inside of the purifying device is directly heated by the heater. Here, since the bacteria and microorganisms such as the miscellaneous bacteria described above are easily proliferated mainly in the purification device, if the inside of the purification device is directly heated by the heater, the miscellaneous bacteria propagated in the purification device are extremely efficiently and effectively sterilized. To be done.

The hot water circulator according to claim 3 is the hot water circulator according to claim 1 or 2, wherein the purifying bacterium is a microorganism belonging to Bacillus subtilis.

According to the warm water circulator having the above-mentioned structure, microorganisms belonging to Bacillus subtilis such as Bacillus Subtilis ATCC 6603 are used as the purifying bacteria. Here, since the microorganisms belonging to Bacillus subtilis are capable of inhabiting in a high temperature atmosphere of 70 to 100 degrees Celsius, the staphylococcus, Escherichia coli, etc., which die at 45 to 50 degrees Celsius, are killed. Even if the bath water in the purifying device is sufficiently heated to sterilize various bacteria, the purifying bacteria (ie, microorganisms belonging to Bacillus subtilis) are not killed. For this reason, various germs can be sufficiently sterilized without reducing the purifying effect of the bacterium on the bath water.

[0017]

1 is a schematic diagram of a system of a hot water circulator 10 according to a first embodiment of the present invention. As shown in this figure, the hot water circulator 10 includes a water intake section 12. This water intake section 12 is installed inside a bathtub 14. Further, the water intake unit 12 is connected to a pump 18 via a pipe 16, and by operating a control device (not shown) of the hot water circulator 10 to operate the pump 18, the inside of the bathtub 14 from the water intake unit 12 is operated. It is possible to pump up (water intake) the bath water.

A hair catcher 20 is detachably attached inside the water intake section 12. The hair catcher 20 is made of a material having open cells such as urethane foam. When the bath water in the bathtub 14 is pumped up from the water intake part 12, coarse dust such as hair in the bathwater is removed by the hair catcher 20. Capture,
It is a configuration that prevents coarse dust from flowing into the water intake section 12 and thereafter.

On the other hand, the side of the pump 18 opposite to the water intake 12 (that is, the discharge side) is connected to an ultraviolet sterilizer 24 via a pipe 22, and the bath water pumped up from the water intake 12 is ultraviolet sterilizer 24. Can be sent in. An ultraviolet sterilizing lamp (not shown) is housed inside the ultraviolet sterilizing device 24, and can sterilize various bacteria such as staphylococci and Escherichia coli in the bath water supplied from the pump 18.

The ultraviolet sterilizer 24 is connected to a purifying cylinder 30 as a purifier through a pipe 28,
Purifying cylinder 30 for bath water that has passed through the inside of the ultraviolet sterilizer 24
Can be sent in. The purification cylinder 30 includes an inner cylinder portion 32 formed of a thermosetting resin material such as phenol resin and melamine resin, and an outer cylinder portion 34 formed of a thermosetting resin material similar to the inner cylinder portion 32. It has a double structure in which two types of cylinders are stacked. The pipe 28 that connects the ultraviolet sterilizer 24 and the purification cylinder 30 is attached to the upper end of the inner cylinder 32 through the outer cylinder 34, and the bath water from the ultraviolet sterilizer 24 is supplied to the inner cylinder 32. It is configured to be sent to the inside of. Further, inside the inner cylindrical portion 32, for example, a large number of filter stones 36 such as natural stones such as barley stone, or granular ceramics formed into a porous body by pulverizing and sintering such natural stones are used. It is housed. Bacillus Subtilis ATCC 6603, which is a bacterium belonging to Bacillus subtilis, is attached to a part or all of these filter media 36. This Bacillus Subtilis ATCC 6603
Like other bacteria belonging to Bacillus subtilis, decomposes organic substances and certain inorganic substances, and propagates using these organic substances and certain inorganic substances as nutrient sources. Also, Bacillus S
ubtilis ATCC 6603, like other bacteria belonging to Bacillus subtilis, is capable of inhabiting in a high temperature atmosphere, and has the characteristic that it can inhabit hot water at 70 to 100 degrees Celsius, for example. ing.

On the other hand, a ceramic heater 40 as a heater is arranged between the inner cylinder portion 32 and the outer cylinder portion 34.
The ceramic heater 40 has a bottomed tubular shape,
It is arranged so as to cover the periphery of the inner cylinder portion 32, and heat is generated by electric power from a power source 42 arranged outside the outer cylinder portion 34, so that the bath water in the inner cylinder portion 32 can be heated via the inner cylinder portion 32.

Here, in the ceramic heater 40, the temperature of the bath water fed into the inner tube portion 32 (cleaning tube 30) is 4 degrees Celsius.
It is set to heat up to 5 degrees, cannot be completely sterilized by the ultraviolet sterilizer 24, and the inner tube 32 together with the bath water.
Other bacteria such as Staphylococcus and Escherichia coli sent to the (cleaning cylinder 30) are sterilized.

A pipe 48 is provided at the lower end of the inner tubular portion 32.
Is attached to one end thereof, and is connected to a discharge part 50 installed in the bathtub 14 through the pipe 48.

Next, the operation of the present embodiment will be described. In the hot water circulator 10, a control device (not shown) is operated to operate the pump 18, and the water intake section 12 to the bath 14
When you pump up the bath water inside, first, hair catcher 20
As a result, coarse dust such as hair in the bath water is captured and removed. Next, the bath water that has passed through the hair catcher 20 is sent to the inside of the ultraviolet sterilizer 24, and is irradiated with ultraviolet rays from an ultraviolet sterilization lamp (not shown). Thereby, various bacteria such as staphylococci and E. coli in the bath water are sterilized.

Further, the bath water that has passed through the ultraviolet sterilizer 24 is fed into the inner tube portion 32 of the purification tube 30. Inside the inner tube portion 32, the Bacillus attached to the filter medium 36
Subtilis ATCC 6603 decomposes organic substances contained in the bath water (for example, amino acids and proteins contained in body fluids, keratinized skin, etc.) to purify the bath water. Further, in this state, the temperature of the bath water inside the inner cylindrical portion 32 is heated to 45 degrees Celsius by the ceramic heater 40. As a result, miscellaneous bacteria such as staphylococcus and Escherichia coli that have not been completely sterilized by the ultraviolet sterilizer 24 and have been fed into the inner cylinder portion 32 (cleaning cylinder 30) together with the bath water are heat-sterilized. here,
Since the temperature of the bath water heated by the ceramic heater 40 is 45 degrees Celsius, the Bacillus Subtilis ATCC 6603 can live in hot water at 70 to 100 degrees Celsius.
Naturally, they live without dying. Therefore, Baci
Purification effect of llus Subtilis ATCC 6603 (ie,
It is possible to reliably heat-sterilize various bacteria such as Staphylococcus and Escherichia coli without deteriorating the decomposition effect of organic substances).

In this way, the purification in the purification cylinder 30
The sterilized bath water is discharged from the discharge unit 50 into the bath 14 for reuse. Here, since the bath water is heated up to 45 degrees Celsius in the purifying cylinder 30, it is possible to take a bath without specially reboiling the bath water in the bathtub 14.

As described above, the hot water circulator 10 is used.
Then, not only the germs in the bath water are sterilized by the ultraviolet sterilizer 24, but also the germs which cannot be sterilized by the ultraviolet sterilizer 24 are sterilized by heating by the ceramic heater 40. Can be sterilized. Therefore, the bath water in the bathtub 14 can always be kept clean, and the bath water can be used repeatedly.

Further, since the temperature of the bath water heated by the ceramic heater 40 is set to 45 degrees Celsius, the inner cylindrical portion 3
Bacillus Subtilis ATCC 6 attached to filter media 36 in 2
603 will never die, Bacillus Subtilis ATCC 66
Does not impair the decomposition and purification effect of organic substances in bath water by 03.

Further, since the ceramic heater 40 for heating the bath water is installed so as to cover the inner tube portion 32, the bath water in the purification tube 30 can be quickly and uniformly heated. Moreover,
Since the ceramic heater 40 is used for the heater,
In addition to the effect of far infrared rays emitted from the ceramic heater 40, heating can be performed more quickly and uniformly, and heat sterilization can be performed efficiently and effectively in a short time.

Further, since the ceramic heater 40 heats the bath water and discharges it from the discharge part 50 into the bath 14,
The bath water in the bathtub 14 can be used for bathing without being reboiled, and it is not necessary to separately provide a heating means for reboiling the bath water.

In this embodiment, the cylindrical ceramic heater 40 is used to heat the bath water in the purification tube 30 (inner tube portion 32). However, for example, as shown in FIG. Alternatively, instead of the ceramic heater 40, a tape-shaped heater 62 may be wound around the inner cylindrical portion 32. Even in this case, the effects described above are not impaired.

Further, in the present embodiment, the cylindrical ceramic heater 40 is arranged outside the inner cylinder portion 32 of the purification cylinder 30, and the bath water is heated through the inner cylinder portion 32. It is not always necessary to dispose the heater outside the inner cylindrical portion 32. That is, instead of having the purifying cylinder 30 having a double structure, for example, as shown in FIG. 3, a purifying cylinder 70 having a single structure is applied, and a spiral heater 72 is provided inside the purifying cylinder 70. Alternatively, the bath water may be heated directly. Further, as shown in FIG. 4, instead of the heater 72, a disk-shaped heater 82 may be arranged in the vicinity of the bottom inside the purification cylinder 70, and as shown in FIG.
The heater 92 may be arranged in a donut shape near the bottom inside the purifying cylinder 70. Further, as shown in FIG. 6, a rod-shaped heater 102, which is long in the axial direction of the purification cylinder 70, may be inserted into the purification cylinder 70 from above to directly heat the bath water. In any of these configurations, the effects described above are not impaired.

Further, in the present embodiment, the bath water is heated to 45 degrees Celsius by the ceramic heater 40 to heat and sterilize various bacteria, and thereafter the bath water is simply returned to the bath 14. A cooling unit for cooling the temperature of the bath water flowing between the cylinder 30 and the discharge unit 50 is provided, and the temperature of the bath water after heat sterilization is a temperature suitable for bathing (for example, 37 to 42 degrees Celsius). After cooling to (4), the water may be returned to the inside of the bath 14 from the discharge part 50 and the bath water may be used again for bathing. In this case, Bacillus Sub
Suitable for bathing by cooling means when returning the bath water to the bathtub 14 even if the temperature of the bath water in the purification tube 30 is raised to a temperature at which tilis ATCC 6603 can inhabit, that is, 70 to 100 degrees Celsius. Since it can be cooled to a high temperature, the purification cylinder 30
The internal bath water can be heated to a higher temperature to surely kill germs. Further, with such a configuration, when the circulation speed of the bath water by the warm water circulator 10 is high, the temperature of the filter medium 36 is about 45 to 50 degrees Celsius in order to kill the bacteria attached to the filter medium 36. And heat it with ceramic heater 40
It is also possible to adjust the final temperature of the circulating bath water (that is, the temperature in the bath 14) to a temperature suitable for bathing at 37 to 42 degrees Celsius.

Next, a second embodiment of the present invention will be described. The same parts as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted.

FIG. 7 shows an outline of the system of the hot water circulator 110 according to the second embodiment of the present invention.
As shown in this figure, the hot water circulator 110 includes a ceramic heater 112 as a heater. This ceramic heater 112 is used for the pump 1 of the ultraviolet sterilizer 24.
8 is installed on the opposite side to 8 and is connected to the ultraviolet sterilizer 24 via a pipe 114. This ceramic heater 1
12 generates heat by electric power from a power supply 113 arranged outside, and can heat the bath water from the ultraviolet sterilizer 24 to a desired temperature. Further, the ceramic heater 112 is connected to a purifying cylinder 120 as a purifying device via a pipe 116.

The purification cylinder 120 is formed of a thermosetting resin material such as phenol resin or melamine resin in a bottomed cylinder shape, and has a Bacillus Subtilis ATCC 6603 inside.
The filter medium 36 to which is attached is stored. Further, the lower end of the purification tube 120 is connected to the valve 126 via the pipe 124. The valve 126 is a so-called three-way valve, one side of the valve 126 opposite to the pipe 124 is connected to the discharge unit 50 via a pipe 128, and the other side is a drain pipe opened outside the bath 14. It is connected to 130. That is, the valve 126 enables the circulation of bath water by closing the drain pipe 130 side and opening the pipe 128 side, and closing the pipe 128 side and opening the drain pipe 130 side allows drainage of the bath water. It is possible.

In the hot water circulator 110 having the above structure, when circulating the bath water to purify the bath water, first, the control device (not shown) is operated to operate the valve 126, and the valve 12
6, the drain pipe 130 side is closed, the pipe 128 side is opened, and the pump 18 is operated. As a result, the bath water in the bathtub 14 from which water has been taken from the water intake unit 12 and coarse dust such as hair has been removed by the hair catcher 20 is fed into the ultraviolet sterilization device 24, and the ultraviolet sterilization lamp in the ultraviolet sterilization device 24 ( Ultraviolet rays from (not shown) sterilize bacteria such as Staphylococcus and Escherichia coli in the bath water. Then
The bath water after the germs are sterilized in the ultraviolet sterilizer 24 is supplied to the ceramic heater 112. In the ceramic heater 112, the fed bath water is heated to a predetermined temperature. Here, in this case (when purifying the bath water), since the bath water is returned to the bathtub 14 again for bathing, the temperature suitable for bathing in the state returned to the bathtub 14, That is, the ceramic heater 112 heats the bath water to about 37 to 42 degrees Celsius. The temperature range described here is a temperature range generally considered to be suitable for bathing, and there is no problem even if the temperature setting is different from this. Next, the bath water heated by the ceramic heater 112 is fed to the purification column 120. Purification cylinder 1
In No. 20, Bacillus Subtilis ATCC attached to the filter medium 36
6603 decomposes organic substances contained in the bath water (for example, amino acids and proteins contained in body fluids, keratinized skin, etc.) to purify the bath water. The bath water purified by the purification column 120 is discharged from the discharge part 50 into the bath 14 through the valve 126 and is reused.

By the way, when the circulation of the bath water is repeated in this way, there is a possibility that various bacteria which cannot be sterilized in the ultraviolet sterilizer 24 adhere to the filter medium 36 of the purification cylinder 120 and propagate. In consideration of this, the purifying cylinder 120 is regularly (for example, once a week and once an hour).
It is preferable to sterilize the germs propagated inside. In this case, first, the control device is operated to operate the valve 126,
The pipe 128 side of the valve 126 is closed and the drain pipe 130 side is opened. Further, the ultraviolet sterilizer 24 is deactivated and the pump 18 is activated. As a result, the bath water taken from the water intake unit 12 and passed through the inside of the ultraviolet sterilizer 24 is supplied to the ceramic heater 112. Here, in this state, the ultraviolet sterilizer 24 is in a non-operating state, and the bath water simply passes through the inside of the ultraviolet sterilizer 24.

In the ceramic heater 112, the fed bath water is heated to a predetermined temperature and fed to the purification column 120. Here, in this case, various bacteria that have propagated in the purification column 120 (that is, various bacteria that have adhered to the filter medium 36 and have propagated).
In order to surely sterilize the water, the ceramic heater 112 heats the bath water to a temperature at which bacteria can be sterilized while being fed to the purification tube 120, that is, a temperature of 45 to 70 degrees Celsius. In this way, when the heated bath water is fed into the purification column 120, the germs propagated in the purification column 120 are surely heat-sterilized. Further, the bath water that has sterilized various bacteria in the purification column 120 is sent to the drain pipe 130 via the valve 126 and drained from the drain pipe 130 to the outside of the bath 14. As a result, it is possible to suppress the propagation of various bacteria in the purification tube 120 and keep the inside of the purification tube 120 always clean. In addition, here, the ceramic heater 112
Since the temperature of the bath water heated by the water and fed into the purification column 120 is 45 to 70 degrees Celsius, Bacillus S that can live in hot water at 70 to 100 degrees Celsius.
ubtilis ATCC 6603 naturally lives without dying. Therefore, even if the bath water is circulated again after the sterilization is completed, the purification effect of the bath water by Bacillus Subtilis ATCC 6603 is not impaired.

Although the ceramic heater 112 is installed between the ultraviolet sterilizer 24 and the purification tube 120 in the present embodiment, the installation location of the ceramic heater 112 is not limited to this. That is, when circulating and purifying the bath water, the bath water is heated to a temperature suitable for bathing, and when sterilizing various bacteria propagated in the purification cylinder 120, the bath water is heated to a sterilizable temperature. Considering that the purpose is to provide the ceramic heater 112, the installation location of the ceramic heater 112 is the purification cylinder 1.
It may be between 20 and the intake part 12, for example, the pump 1
8 and the ultraviolet sterilizer 24 between the ceramic heater 112
May be installed. Further, the purification cylinder 120 may be provided with the ceramic heater 112.

Further, in the present embodiment, the bath water after heating and sterilizing the inside of the purification cylinder 120 is drained from the drain pipe 130, but, for example, flows between the purification cylinder 120 and the discharge part 50. A cooling unit for cooling the temperature of the bath water is provided, and the temperature of the bath water after heat sterilization is cooled to a temperature suitable for bathing (for example, 37 to 42 degrees Celsius) by the cooling unit, and then the discharge unit 50 is used to cool the bath water. It may be configured such that the water is returned to the inside of 14 and bath water is again used for bathing. In this case, the bath water can be reused after sterilization, so that the bath water can be further saved.

Further, in the present embodiment, the purification cylinder 120
When heating and sterilizing the inside, the heater 112 is arranged so that the temperature of the bath water becomes 45 to 70 degrees Celsius in the purification tube 120.
The bath water was heated by the heater, but this heater 1
The heating temperature of the bath water by 12 is not limited to this. That is, it may be better to change the temperature of the bath water depending on various conditions such as heat resistance of the purifying bacteria to be applied.

Further, in each of the above embodiments,
Although it was a configuration using Bacillus Subtilis ATCC 6603, other microorganisms belonging to Bacillus subtilis, or even other microorganisms not belonging to Bacillus subtilis can decompose the above-mentioned organic matter, and further, such as Staphylococcus or Escherichia coli. If it is a microorganism that can live even at a temperature at which various bacteria can be sterilized, it may be applied instead of Bacillus Subtilis ATCC 6603.

[0044]

As described above, in the warm water circulator of the present invention, not only can the organic matter contained in the bath water be decomposed to purify the bath water, but also various bacteria such as staphylococcus and Escherichia coli can be surely sterilized. Therefore, the bath water in the bath can be kept clean at all times, and the bath water can be repeatedly used, which is an extremely excellent effect.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of a system of a hot water circulator according to a first embodiment of the present invention.

FIG. 2 is a view showing a modified example of the hot water circulator according to the first embodiment of the present invention, and is a view showing a modified example in which the shape of the heater is changed.

FIG. 3 is a view showing a modified example of the hot water circulator according to the first embodiment of the present invention, and is a view showing a modified example of the configuration in which the heater is provided inside the purifying device.

FIG. 4 is a view showing a modified example of the hot water circulator according to the first embodiment of the present invention, and is a view showing a modified example of the configuration in which the heater is provided inside the purifying device.

FIG. 5 is a diagram showing a modified example of the hot water circulator according to the first embodiment of the present invention, and is a diagram showing a modified example of the configuration in which the heater is provided inside the purifying device.

FIG. 6 is a view showing a modified example of the hot water circulator according to the first embodiment of the present invention, and is a view showing a modified example of the configuration in which the heater is provided inside the purifying device.

FIG. 7 is a diagram showing an outline of a system of a hot water circulator according to a second embodiment of the present invention.

[Explanation of symbols]

 10 Hot Water Circulator 12 Water Intake Part 14 Bathtub 30 Purification Cylinder (Purification Device) 40 Ceramic Heater (Heater) 50 Discharge Unit 62 Heater 70 Purification Cylinder (Purification Device) 72 Heater 82 Heater 92 Heater 102 Heater 110 Hot Water Circulator 112 Ceramic Heater ( Heater) 120 Purification cylinder (purification device)

Claims (3)

[Claims] 1. A water intake unit arranged in a bathtub for taking bath water from the bathtub; a discharge unit arranged in the bathtub for discharging the bath water taken by the water intake unit into the bathtub; A purification device having heat-resistant purifying bacteria capable of decomposing organic substances contained in the bath water, which is installed between the water intake portion and the discharge portion to purify the bath water taken by the water intake portion, and the purification A hot water circulator comprising: a heater that heats the bath water to a predetermined temperature at which bacteria can live and sterilize other bacteria other than the purified bacteria. 2. The hot water circulator according to claim 1, wherein the heater is provided in the purification device. 3. The hot water circulator according to claim 1, wherein the purifying bacterium is a microorganism belonging to Bacillus subtilis.