JP3438938B2 - Bathtub cleaning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water cleaning device, and more particularly to a sterilization device for this device.

[0002]

2. Description of the Related Art Bath water forcibly circulated in a bathtub by using a circulation pump to remove dirt from the hot water by a filtration device provided in a circulation path and then activated in an activated stone tank The purifying device has been conventionally developed.

More recently, in addition to simply removing dirt and activating it in hot water, it is heated by a heater to always maintain an appropriate temperature so that the user can take a bath at any time for 24 hours.

In this case, it is needless to say that the hot water must be kept clean, but sterilization is also necessary in order to prevent the generation of a bad odor.

In the past, sterilization of hot water was conventionally performed by chlorine sterilization with chemicals, but recently, a small high-pressure discharge type ozone generator, so-called ozonizer, was developed.
As shown in FIG. 8, most devices use an ozonizer for easy sterilization.

In this apparatus, the hot water 2 in the bathtub 1 is sucked up by a circulating pump 6 from a hot water pipe 3 having a prefilter 10 attached to the tip thereof to a main body 4 of the apparatus in which various cleaning treatment devices are collectively housed. The cleaning process is performed, and the hot water after the cleaning process is ejected again into the bathtub 1 from the spout tube 9 having the jet nozzle 11 attached to the tip thereof.

The apparatus body 4 is provided with a filtration tank 5 filled with various types of granular filter media such as activated carbon, barley stone, zeolite, a circulation pump 6 for forcedly circulating hot water, and a heater 7 for keeping the hot water at an appropriate temperature. Etc. are connected and connected in series by a connecting pipe, and one end of the hot water suction pipe 3 is connected to the hot water inlet of the filtration tank 5.
One end of the spout tube 9 is connected to the discharge port of the circulation pump 7 to form a series cleaning circulation path for the hot water 2 in the bath 1.

The jet nozzle 11 attached to the tip of the spout tube 9 is provided with an ejector portion for inhaling air by using a negative pressure formed by accelerating the flow velocity of the hot water to mix air into the hot water. An intake pipe 12 having a solenoid valve 13 provided at the intake port is connected to the intake pipe 12, and an ozonizer 8 for ozone-izing the sucked air is attached to the intake pipe 12.

In the above apparatus, the hot water 2 in the bathtub 1 is sucked up from the hot water pipe 3 while the dirt is removed by the prefilter 10 by the operation of the circulation pump 6 and the apparatus main body 4
First, it is filtered in the filtration tank 5, and then the heater 7
After being kept warm by, it is jetted again into the bathtub 1 from the jet nozzle attached to the tip of the spout tube 9.

At this time, air is sucked into the intake pipe 12 when the solenoid valve 13 provided at the intake port is open, and a jet flow mixed with air is jetted from the jet nozzle 11 into the bathtub 1.
It becomes a so-called bubble bath that is jetted into the interior, and when the ozonizer 8 is operating, the air that is drawn in is ozoned,
The hot water 2 in the bathtub 1 is sterilized by ozone.

[0011]

However, as described above, when ozone is sterilized by directly mixing ozone into the hot water circulating in the cleaning pipe, the reaction is completed with a short reaction time according to the circulation rate of the hot water. Since it has to be sterilized, excess ozone is inevitably mixed in the hot water.

As a result, a large amount of unreacted ozone remains in the hot water, and when hot water containing a large amount of unreacted ozone is jetted into the bathtub, a large amount of ozone is discharged from the bathtub to the bathroom. It is released into the bath and the bather not only becomes uncomfortable by sniffing the unique ozone odor, but it is also anxious about the health hazard if inhaled.

As described above, in order to prevent ozone from being released into the bathroom and harming the bather, ozone is mixed into the hot water in a pipe line upstream from the bathtub to remove the ozone from the hot water before entering the bathtub. It is also conceivable that unreacted ozone is separated by a gas-liquid separation device, the separated ozone is decomposed by a decomposition device to be harmless, and then exhausted.

However, since the gas-liquid separation device is provided, the cleaning device itself becomes complicated and expensive, and the ozone separated from the hot water cannot be easily decomposed because it is moist, and the decomposition is completely completed. In order to do so, a fairly large-scale and expensive disassembling device is required, which is not practical as a device for cleaning bath water.

Recently, in order to overcome the drawbacks of the ozone sterilization method in which ozone generated by the ozonizer is directly mixed with the hot water circulating in the cleaning pipeline, ultraviolet sterilization is often used.

In this sterilization method, an ultraviolet irradiating device having an ultraviolet irradiating lamp is installed in a cleaning conduit of bath water together with other cleaning equipment such as a filtering device in series, and the cleaning conduit is circulated. It is a method of sterilizing hot water by irradiating it with ultraviolet rays.

When the ultraviolet sterilizer is arranged in series in the cleaning pipe as described above, the sterilization time is determined by the circulation speed of the hot water and the size of the ultraviolet irradiation device, and the effect of other cleaning treatments such as filtration. Considering the above, the circulation speed of the hot water cannot be so slow, and the ultraviolet irradiation device cannot be made so large considering the size of the device, so the sterilization time was naturally shortened and it was difficult to completely sterilize the hot water.

The present invention solves the above-mentioned drawbacks of the prior art, and provides a bath water purifying device which has no fear of harming the human body due to unreacted ozone and is capable of completely sterilizing hot water. The purpose is to do.

[0019]

SUMMARY OF THE INVENTION The present invention relates to a bath water purifying device for circulating hot water in a bath in a circulation path to filter dirt on the bath with a filtering device. Cleaning means for sucking up the hot water pipe to circulate the circulation path including the filtering means and returning it from the first hot water pipe to the bath to filter dirt on the hot water; and hot water in the bath from the second hot water pipe. Sterilizing and circulating means for circulating the circulation path including the sucking and sterilizing means to return the second hot water pipe to the bath to sterilize the hot water, and to circulate the circulation speed of the hot water circulating through the circulation path of the sterilizing and circulating means to the cleanliness. The problem was solved by providing a bathtub hot water cleaning device characterized in that it is slower than the circulation speed of the hot water of the purifying means. Further, the present invention relates to a bath water purifying device which circulates the hot water in the bathtub through a circulation path to filter dirt of the hot water by a filtering device, and sucks the hot water in the bathtub from a first hot water pipe to filter means. A cleaning means for circulating a circulation path including the water from the first spout pipe back to the bath to filter dirt in the hot water;
Of the hot water circulating in the circulation path of the sterilization circulation means by circulating the circulation path containing the sterilization means from the hot water suction pipe and returning it from the second hot water pipe to the bath to sterilize the hot water. The problem has been solved by providing a bathtub hot water cleaning device characterized in that the time for which sterilization is effective can be set. Furthermore, the present invention provides a bathtub hot water purifying device characterized in that the circulation path of the sterilization circulation means is provided with a tank for sterilization for temporarily storing circulating hot water. Settled.

[0020]

The present invention is constructed as described above, and since the ultraviolet ray sterilization pipeline is independent of the main purification pipeline mainly composed of filtration, it is not affected by the hot water treatment rate of the main purification pipeline. Then, it can be sterilized by UV light for the required time depending on how dirty the hot water is.

Therefore, even if the ultraviolet sterilization method is adopted as the sterilization method, the ultraviolet irradiator can be effectively sterilized because it can be sterilized in a sufficient amount of time even if it is small.

When the sterilization spout tube of the sterilization line is connected to the main cleaning line, if the connection position is the suction side line of the circulation pump, the suction force of the circulation pump is used as it is, and the connection position is the circulation pump. In the case of the discharge side pipe, the suction force of the edger part that narrows the pipe diameter to speed up the flow rate of hot water is used to circulate the main purification line without installing a circulation pump in the sterilization line. The hot water can be circulated by the action of the pump.

Further, a diffusing plate is provided in the ultraviolet sterilization tank to mix air into the hot water, and the wavelength is 100 to 300 nm.
When ultraviolet rays containing a short wavelength to a long wavelength are irradiated, the air mixed with the short wavelength ultraviolet rays having a wavelength of about 185 nm is ozonized and the effect of ozone sterilization is also given in addition to the sterilizing effect of the ultraviolet rays themselves.

Moreover, the ozone which is generated by the irradiation of short wavelength ultraviolet rays and remains unreacted is decomposed into harmless oxygen when irradiated with long wavelength ultraviolet rays having a wavelength of around 250 nm, and the oxygen generated by this decomposition is active. Furthermore, since it acts to sterilize and decomposes inorganic and organic substances in hot water, not only does unreacted ozone remain in the hot water and it does not harm the human body, but cleaning of the hot water becomes more effective. .

[0025]

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

First, the basic construction of the present invention will be described with reference to the basic block diagram of FIG.

In the present invention, the circulation path for the hot water 2 in the bathtub 1 is a main purification line 14 which mainly comprises filtration by the filtration device 5.
And an ultraviolet sterilization tank 15 in which the ultraviolet sterilization tank 18 performs ultraviolet sterilization by the ultraviolet sterilization tank 18, and two independent pipelines.

The main cleaning pipeline 14 is a pipeline obtained by removing the sterilizing function from the above-mentioned conventional cleaning pipeline, so the description thereof will be omitted. However, the ultraviolet sterilizing pipeline 15 includes the hot water 2 in the bathtub 1. The sterilizing hot water suction pipe 16 to be pumped up, the sterilizing sterilizing circulation pump 17 for circulating the hot water in the pipeline, the sterilizing hot water are stored, and the collected hot water is mixed with air from the air diffuser 23 as necessary. Meanwhile, an ultraviolet sterilization tank 18 that irradiates ultraviolet rays with an ultraviolet irradiation device 20 to sterilize the ultraviolet rays, and an ultraviolet sterilization tank 1
It is composed of a sterilizing spout tube 19 for spraying the sterilized hot water stored in 8 again into the bathtub 1.

Reference numeral 27 is a control device for controlling the device as a whole by using a microcomputer.
7, by driving the sterilization circulation pump for storing hot water in the ultraviolet sterilization tank 18 or ejecting the stored hot water that has been sterilized into the bath tub 1, irradiating the stored hot water with ultraviolet light from the ultraviolet irradiation device 20. The operation of the air pump 25 provided in the air supply pipe 24 and the opening and closing of the solenoid valve 26 for mixing air from the air diffuser plate 23 into the hot water.
All operations of UV sterilization of the hot water 2 in the bath tub 1 via 5 are controlled.

Next, the concrete constitution of the present invention will be explained based on the piping diagram.

FIG. 2 shows a first embodiment of the present invention,
The main cleaning line 14 mainly for filtration is a line obtained by removing the sterilizing function from the conventional cleaning line, and the ozonizer 8 is removed from the intake pipe 12 connected to the jet nozzle 11.

Reference numeral 15 is an ultraviolet ray sterilization line completely independent of the main cleaning line 14, and the ultraviolet ray sterilization line 15 is equipped with a prefilter 28 at the tip of the hot water 2 in the bathtub 1 for sterilization circulation. Pump 17 and check valve 29
A sterilization hot water pipe 16 in which is provided, an ultraviolet sterilization tank 18 for storing sterilization hot water and performing ultraviolet sterilization, and a sterilization hot water pipe 19 for again squirting the hot water stored in the ultraviolet sterilization tank 18 and sterilized into the bath 1. It consists of

The sterilization tank 18 is provided with an ultraviolet irradiator 20 in the center, and the bottom is provided with a diffuser plate 23 for uniformly ejecting air into the tank and mixing it in the hot water. An air pump 25, which is connected to the tip of the air pump 25, is connected to the air supply pipe 24.

The ultraviolet irradiator 20 has an ozone tube 21 covered with a quartz glass tube 22 and emits ultraviolet rays having a wavelength of 100 to 260 nm including both wavelengths for ozone generation near 185 nm and ozone decomposition near 250 nm. .

In the apparatus of the present embodiment constructed as described above, the hot water 2 in the bathtub 1 is first pumped by the operation of the circulation pump 6 while filtering large dirt from the hot water pipe 3 with the prefilter 10. After being filtered by the filtration tank 5 and kept at an appropriate temperature by the heater 7, it is circulated through the main cleaning pipe line 14 mainly composed of the filtration that is jetted again from the molten metal pipe 9 into the bath 1.

In the circulation of the main cleaning pipe line 14, since the jet nozzle 11 to which the intake pipe 12 is connected to the negative pressure portion is attached to the tip of the spout pipe 9, the solenoid valve 13 should be opened to intake air from the intake pipe 12. As a result, a jet flow containing air is ejected from the jet nozzle 11 to form a bubble bath.

The hot water 2 in the bathtub 1 is the circulating pump 6 described above.
Separately from the circulation of the main cleaning line 14 by the operation of, the sterilization circulation pump 17 is operated to remove large dirt with the prefilter 28 in the sterilization hot water pipe 16 and is sterilized in the sterilization line 15.

That is, the sterilization circulation pump 17 is first operated for a time sufficient for the hot water 2 in the bathtub 1 to be stored in the sterilization tank 18 up to a predetermined water level, and automatically when the hot water is stored in the sterilization tank 18 up to the predetermined water level. Stop.

When the hot water is stored in the sterilization tank 18 to a predetermined water level and the sterilization circulation pump 17 is stopped, the electromagnetic valve 26 is opened and the air pump 25 is operated at the same time to operate the air supply pipe 24 so that the air is diffused from the air diffuser plate 23. It jets into the stored hot water, and at the same time, the ozone tube 21 of the ultraviolet irradiation device 20 is turned on to sterilize it with ultraviolet rays.

When the sterilization for a predetermined time is completed, the solenoid valve 26
At the same time as closing, the air pump 25 is stopped to stop the air blow from the air diffuser 23, and the ultraviolet irradiation device 2
The ozone pipe 21 of 0 is turned off, the irradiation of ultraviolet rays is stopped and the ultraviolet sterilization is terminated, and then the circulation pump 17 is operated again for a predetermined time to sterilize the sterilized hot water in the sterilization tank 18 from the sterilization spout pipe 19 into the bathtub 1. And simultaneously pump up hot water 2 for the next sterilization from the bath 1.

The hot water 2 in the bath 1 circulates through the sterilization pipe 15 while repeating the above-mentioned operations under the control of the above-mentioned control device 27, and the main cleaning pipe 14 mainly performs filtration. UV sterilization is performed by a batch process regardless of the conventional cleaning process.

Therefore, the time of the ultraviolet sterilization treatment depends on the degree of contamination of the hot water, regardless of the circulation speed of the hot water in the main cleaning pipe 14 for the continuous cleaning treatment mainly including filtration. It is freely defined, and it allows complete sterilization no matter how dirty the hot water is.

It is needless to say that the sterilization time can be adjusted manually, but it can also be automatically controlled by the control device 27 using, for example, a fixed time interval, turbidity of hot water, and the number of people bathing as an index.

As described above, since the ultraviolet ray irradiating apparatus emits ultraviolet rays having wavelengths of ozone generation near 185 nm and ozone decomposition near 250 nm, the hot water stored in the ultraviolet sterilization tank 18 Air diffuser 2
The air spouted and mixed in from No. 3 is ozonized by ultraviolet rays around 185 nm, and ozone sterilization is also used, and sterilization is more complete.

Moreover, even if ozone sterilization is used in combination with ultraviolet sterilization as described above, excess ozone is not generated by adjusting the amount of air mixed in the hot water, and unreacted ozone is ultraviolet light having a wavelength of about 250 nm. Will be decomposed by
Almost no unreacted ozone can be contained in the hot water spouted from the sterilization spout tube 19 in the bathtub, so that even if the ultraviolet sterilization treatment accompanied by the generation of ozone is performed during bathing, it does not harm the bather. Absent.

Next, a second embodiment will be described with reference to FIG.

The basic construction of this embodiment is the same as that of the first embodiment, and the ejector section for forming a negative pressure by accelerating the flow velocity of the hot water by making the diameter of the spout 9 of the main cleaning pipe 14 thin. 30 is provided, and the end of the germicidal spout tube 19 of the ultraviolet ray germicidal conduit 15 is connected to this edger section 30.

In this embodiment, since the hot water 2 in the bathtub 1 is circulated to the ultraviolet ray sterilization conduit 15 by the suction force of the ejector section 30, the ultraviolet ray sterilization circulation path 15 has the same structure as in the first embodiment. It is not necessary to provide the sterilization circulation pump 17, and instead, the sterilization hot water suction pipe 16 is provided with a solenoid valve 31 for opening and closing the hot water suction passage.

Further, in the first embodiment, air is supplied from the air supply pipe 24 to the ultraviolet sterilization tank 18 by the air pump 25.
However, since the suction force of the ejector unit 30 can be used in this embodiment, the air pump 2 is used.
There is no problem even if 5 is omitted.

Therefore, in this embodiment, the main cleaning line 1
Under the control of the controller 27 when hot water is circulating in 4,
The electromagnetic valve 31 is opened for a predetermined time, the hot water 2 in the bathtub 1 is stored in the ultraviolet sterilization tank 18 to a predetermined water level, the electromagnetic valve 26 is opened to mix air into the hot water, and the ultraviolet irradiation device 20 is further opened for a predetermined time.
The ozone tube 21 can be turned on to perform ultraviolet sterilization in combination with ozone sterilization.

Next, a third embodiment will be described with reference to FIG.

In this embodiment, in the second embodiment, the jet nozzle 11 attached to the tip of the jet ejector portion 30 provided in the middle of the spout pipe 9 of the main cleaning pipe 14 also serves as the sterilization spout pipe 19 of the ultraviolet sterilization pipe 15. 1 is the jet nozzle
It is connected to the first ejector section, and the sterilizing operation in this embodiment is exactly the same as in the second embodiment.

In the present embodiment, as shown in FIG. 5, the electromagnetic valve 30 of the sterilization hot water absorption pipe 16 is closed so that no water is stored in the ultraviolet sterilization tank 18 and the ozone pipe of the ultraviolet irradiation device 20 is turned off. If the solenoid valve 25 of the air supply pipe 24 is opened, a jet flow containing air is jetted from the jet nozzle 11 at the tip of the spout pipe 9 to form a bubble bath.

Next, a fourth embodiment will be described with reference to FIG.

In this embodiment, in the second and third embodiments, the sterilizing spout pipe 16 of the ultraviolet sterilizing pipe 15 is connected to the spout pipe 9 which is the discharge side of the circulation pump 6 of the main cleaning pipe 14. On the other hand, it is connected to the suction pipe 3 on the suction side through the three-way switching valve 32.

Therefore, the bathtub 1 to the ultraviolet ray sterilization pipeline 15
Since the circulation of the hot water 2 in the inside can be performed by using the suction force of the circulation pump 6 of the main cleaning pipe line 14, the sterilization spout pipe 19 of the ultraviolet sterilization pipe line 15 is used as in the second and third embodiments. There is no need to connect to the main cleaning line 14 via the edger section.

Therefore, in this embodiment, under the control of the control device 27, the three-way switching valve 32 of the hot water suction pipe 3 of the main cleaning pipe 14 is moved in the direction of the sterilization hot water pipe 19 of the ultraviolet sterilization pipe 15 for a predetermined time. If you switch it so that it also leads to, bathtub 1
The hot water 2 therein is circulated through the main cleaning pipeline 14, and at the same time, it is pumped up to a predetermined water level in the ultraviolet sterilization tank 18, and the solenoid valve 26
Then, air is mixed into the hot water, and the ozone tube 21 of the ultraviolet irradiation device 20 is further turned on for a predetermined time to perform ultraviolet sterilization in combination with ozone sterilization.

As shown in the above second to fourth embodiments, the ultraviolet sterilization conduit 15 is provided with a special circulation pump even if the sterilization spout pipe 19 is connected at any position of the main cleaning conduit 14. UV sterilization tank 18 for hot water 2 in bathtub 1
It becomes possible to sterilize a predetermined amount.

The control relating to the sterilization of the control device 27 of the device of the present invention configured as described above will be described with reference to the control block diagram of FIG.

The control device 27 is basically a central processing unit 33 and a program ROM storing a control program.
34, and R for temporarily storing data for arithmetic processing
It is a micro computer composed of AM35.

The input device is provided with a sterilization condition setting key 36 for setting the sterilization condition, which is provided with an automatic / manual switching key and a sterilization interval and sterilization time for determining the sterilization interval and sterilization time according to the degree of contamination of the hot water. There are provided a hot water stain degree setting key for setting the stain degree of large, medium, and small, or a bathing person number setting key for setting the number of bathing persons per day to be determined by the number of bathing persons.

In addition, in order to automatically determine the sterilization interval and sterilization time depending on the turbidity which is the degree of dirt in the hot water, for example, a turbidity sensor 37 for optically detecting the transparency of the hot water is installed in the bathtub 1. Deploy, set the sterilization interval and sterilization time,
A timer 38 for measuring this elapsed time is also provided.

Reference numeral 39 denotes a sterilization control data storage device, which stores the overall control program data of the ultraviolet sterilization pipeline 15 such as the relationship between the degree of soiling of hot water and the sterilization conditions, which has been obtained by experiments in advance. Has been done.

That is, in the sterilization control day storage device 38,
The sterilization hot water pipe 16 for the sterilization time interval according to the degree of contamination of the hot water and the amount of hot water absorption according to the capacity of the ultraviolet sterilization tank 18
Sterilization circulation pump 17 or solenoid valve 31, or hot water pipe 3
Various sterilization control data such as hot water absorption time after activating the three-way switching valve 32, ultraviolet irradiation time according to sterilization time, and air feeding time are stored.

In the control device configured as described above, the CPU 33 controls the sterilization conditions such as the degree of contamination of hot water set by the sterilization condition setting key 36 to be large, medium, small, and the number of bathing persons, and the turbidity sensor 37. Sterilization control data according to sterilization conditions such as turbidity of the sterilization control data storage device 39 is called, and the sterilization circulation pump 17 of the sterilization water suction pipe 16 is used to circulate the hot water in the ultraviolet sterilization pipe 15 based on this data. Alternatively, the operation of the solenoid valve 31 or the three-way switching valve 32 of the hot water pipe 3 is first controlled.

Further, the CPU 33 also determines the operating time of the ultraviolet irradiation device 20 and the air pump 25 according to the set sterilization condition based on the sterilization control data called from the sterilization control data storage device 39 according to the degree of contamination of the hot water. Control to ensure complete UV sterilization.

[0067]

The present invention has the above-described structure and operation, and is provided with an ultraviolet sterilization conduit provided with an ultraviolet sterilization tank independently of the main cleaning conduit mainly composed of filtration. Therefore, the sterilization can be completely carried out as a batch process, taking a sufficient time depending on the contamination of the hot water, regardless of the cleaning in the main cleaning line.

Further, for the ultraviolet sterilization, since air mixed with air in the treated hot water is ozonized by ultraviolet rays having a wavelength of about 185 nm and ozone sterilization is also used, more complete sterilization can be performed.

Moreover, even if ozone sterilization is used in combination with ultraviolet sterilization as described above, excess ozone is not generated by adjusting the amount of air mixed in the hot water, and unreacted ozone is ultraviolet light having a wavelength of about 250 nm. Will be decomposed by
Unreacted ozone can be made to be hardly contained in the hot water spouted from the sterilization hot water pipe in the bathtub, so that even if the ultraviolet sterilization treatment accompanied by the generation of ozone during bathing is done, no harm is given to the bather. .

Further, the apparatus is constructed so that the germicidal spout tube of the ultraviolet ray sterilization pipeline is connected to the main cleaning pipeline so that the ultraviolet ray sterilization pipeline does not need to be provided with a special circulation pump, which is extremely inexpensive and simple. it can.

Further, in this apparatus, if the sterilization time is adjusted by using the control device by the micro computer which uses the turbidity of the hot water or the number of bathers as an index, the sterilization time of the optimum time according to the dirt of the hot water can be obtained. It can be done automatically.

[Brief description of drawings]

[Figure 1] Basic block diagram,

FIG. 2 is a first embodiment,

FIG. 3 is a second embodiment,

FIG. 4 is a third embodiment (sterilized state),

FIG. 5: Third embodiment (foam bath state),

FIG. 6 is a fourth embodiment,

FIG. 7 is a control block diagram,

FIG. 8 shows a conventional example.

[Explanation of symbols]

1 bathtub 2 hot water 3 Hot water pipe 4 Device body 5 Filtration tank 6 circulation pumps 7 heater 8 Ozonizer 9 Hot water pipe 11 Jet nozzle 14 Main purification line 15 UV sterilization pipeline 16 Sterilizing hot water pipe 17 Sterilization circulation pump 18 UV sterilization tank 19 Sterilization fountain tube 20 UV irradiation device 21 ozone tube 22 Quartz glass tube 23 Air diffuser 24 Air tube 27 Control device 30 Edger section 32 three-way switching valve

Claims (3)

(57) [Claims] Claim: What is claimed is: 1. A bathtub hot water purifying device, wherein hot water in a bathtub is circulated in a circulation path and dirt of hot water is filtered by a filter device. A cleaning means for circulating the circulation path including the water from the first spout tube to the bath to filter dirt in the hot water, and a circulation path including the sterilization means for sucking hot water in the bath from the second water suction tube. And a sterilizing / circulating means for circulating and returning the second hot water pipe to the bath to sterilize the hot water. The circulation speed of the hot water circulating in the circulation path of the sterilizing circulation means is higher than the circulation speed of the hot water of the cleaning means. A bathtub hot water cleaning device characterized by low speed. 2. A bathtub hot water purifying device which circulates hot water in a bathtub through a circulation path to filter dirt on the hot water by a filter device, wherein the hot water in the bathtub is sucked up from a first hot water pipe and a filtering means is provided. A cleaning means that circulates a circulation path that includes the first hot water pipe to return to the bathtub to filter dirt in the hot water, and a circulation path that includes the sterilization means that sucks the hot water in the bathtub from the second hot water pipe. And a sterilizing / circulating means for sterilizing the hot water by returning from the second spout pipe to the bathtub, and it is possible to set a time during which the sterilizing of the hot water circulating in the circulation path of the sterilizing / circulating means is effective. Cleaner for bath water. 3. The bath water purifying apparatus according to claim 1, wherein the circulation passage of the sterilization circulation means is provided with a sterilization tank for temporarily storing the circulating hot water. ..