JPH10314771A - Purification device for bathwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a purification device for bathwater in which there is no smell of ozone gas even if a large amount of ozone gas is mixed into bathwater to accelerate the sterilizing and deodorizing actions of the mixed ozone gas. SOLUTION: In the purification device for bathwater including a filter device 1, activating device 10, and water pump 8, there are further provided an ozone gas mixing device 20 for mixing ozone gas into bathwater and an ozone gas reactor tank 40 for accelerating the reaction of ozone gas mixed into the bathwater by the device 20. And the bathwater mixed with ozone gas is returned to a bathtub via the reactor tank 40. And a gas vent valve 48 is provided on the reactor tank 40 and a gas purification device 50 filled with active carbon for adsorption of ozone gas is attached to a vent pipe C of the valve 48.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a filtering device, an activating device, a water pump and the like. When the water pump is driven, hot water in the bathtub circulates between the bathtub, the filtering device and the activating device. Further, the present invention relates to a bath hot water purifying apparatus in which the bath hot water is subjected to processes such as filtration and purification.

[0002]

2. Description of the Related Art A filtration device for removing solid matter such as human hair in bath water, a water pump for forcibly circulating bath water,
An activation device containing activated stones such as ceramics, shell fossils and barley stone, an ozone gas generator for generating ozone gas having an action of sterilization and deodorization, a heater for heating bath water to a predetermined temperature, The bath water purifying device equipped with a control device for controlling the mixing time of the ozone gas, the heater, etc.
Applicant has disclosed Japanese Utility Model Laid-Open No. 6-48893, Japanese Patent Laid-Open No. 7-1.
Many proposals have been made, for example, in US Pat. Since these bath water purifying devices are provided with an activating device, when the bath water passes through the activating device,
Bacteria that propagate on the activated stones and live in other nutrients decompose organic matter, for example, Ammonya, which causes the bath water to decompose, and purify the bath water. Further, the bath water is ion-exchanged, and active ingredients such as magnesium, zinc, calcium, and sodium are dissolved in the bath water, and the hydrogen ion concentration of the bath water is adjusted to be slightly alkaline. Thereby, a bath effect is imparted to the bath water.

[0003] In addition, since the ozone gas generator is provided, various bacteria in the bath water are sterilized by the ozone gas. Legionella bacteria, which are said to cause pneumonia, are particularly effectively sterilized. In addition, an action such as decomposition and deodorization of organic substances having a large molecular weight that bacteria cannot be decomposed can be obtained. Furthermore, the ozone gas becomes dissolved oxygen to assist the propagation of the aerobic bacteria growing in the activation device, and the effect of further promoting the purification by the bacteria can be obtained.

[0004]

As described above, according to the bath hot water purifying apparatus proposed by the present applicant, the bath hot water has a bathing effect, bacteria are almost completely sterilized, and the predetermined temperature is maintained. , It is possible to enjoy an excellent effect of being able to enjoy bathing in a healthy manner for 24 hours. However, some points need to be improved. For example, ozone gas is mixed into bath water through an orifice or a throttle, but it is only mixed and no special treatment is performed, so ozone gas can be sterilized, decomposed organic substances, deodorized, etc. Do not like to contribute enough to the action of. Further, when the ozone gas exerts actions such as sterilization, decomposition, deodorization, etc., it becomes oxygen gas. If the ozone gas is not sufficiently reacted, the ozone gas is discharged as it is, and the smell peculiar to the ozone gas may be emitted.

Furthermore, if the ozone gas mixing device is composed of an orifice, a throttle, and the like, there is an advantage that the mixing device has no moving parts and can be used semi-permanently. There is also the problem that you cannot self-prime. This problem can be solved to some extent by using a high-power water pump so that a large negative pressure is generated in the throttle. However, a high-output water pump is expensive, and when bath water is circulated so as to generate a large negative pressure, another problem arises in that the pressure loss increases accordingly and the power cost increases.

SUMMARY OF THE INVENTION The present invention aims at providing a bath water purifying apparatus which solves the above-mentioned points or problems to be improved. Specifically, an ozone gas mixing apparatus has no mechanically movable parts. , Although it can be used semi-permanently,
It is an object of the present invention to provide a bath water purifying apparatus in which a large amount of ozone gas is mixed into bath water and sterilization, deodorization and the like by the mixed ozone gas are further enhanced. Also,
Another object of the present invention is to provide, in addition to the above objects, a bath hot water purifying apparatus free from the smell of ozone gas. Still another object of the present invention is to provide an apparatus for purifying a bath which can be freely obtained for 24 hours.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for efficiently mixing ozone gas into bath water, in addition to a filtration device, an activation device, a water pump, an ozone gas generator, and the like. An ozone gas mixing device and an ozone gas reaction tank are provided so that the mixed ozone gas exerts effects such as sterilization and deodorization more completely. That is, the present invention
In order to achieve the above object, a filtration device, an activation device, a water pump and the like are provided, and when the water pump is driven, hot water in a bathtub circulates between the bathtub, the filtration device, the activation device and the like. A bath water purifying apparatus in which the bath water is subjected to a treatment such as filtration and purification, wherein the bath water purifying apparatus further comprises an ozone gas mixing apparatus for mixing ozone gas into the bath water. And an ozone gas reaction tank for accelerating the reaction of the ozone gas mixed by the ozone gas mixing device, and the bath water mixed with the ozone gas is configured to return to the bath tub via the ozone gas reaction tank. . The invention according to claim 2 includes a filtration device, an activation device, a water pump, and the like. When the water pump is driven, hot water in the bathtub circulates between the bathtub, the filtration device, the activation device, and the like. A bath water purifying apparatus in which the bath water is subjected to a treatment such as filtration and purification, wherein the bath water purifying apparatus further includes ozone gas mixing for mixing ozone gas into the bath water. An ozone gas reaction tank for accelerating the reaction of the ozone gas mixed by the ozone gas mixing apparatus, a heater, and a control device, wherein the bath water mixed with the ozone gas passes through the ozone gas reaction tank And the temperature of the bath water is controlled by the control device. The third aspect of the present invention is the first aspect.
Alternatively, the ozone gas mixing device described in claim 2 is provided downstream of the activation device, and the invention described in claim 4 is based on claim 1.
The ozone gas mixing apparatus according to any one of the above-described items, the swirling body, a mixing supply pipe that supplies bath water to the swirling body, a mixing discharge pipe that discharges the bath water swirled in the swirling body, An ozone gas supply pipe for supplying ozone gas, wherein the mixing supply pipe and the mixing discharge pipe are provided substantially tangentially to the body of the revolving drum, and the ozone gas supply pipe opens at a substantially central portion of the revolving drum. It is configured as follows. Claim 5
The revolving drum according to claim 4 comprises a first revolving drum and a second revolving drum, these revolving drums are connected in series, the center portion is opened, and the mixing supply pipe is provided. In the first revolving drum, the mixing and discharging pipe is provided substantially tangentially to the second revolving drum, and the ozone gas supply pipe is opened at a substantially central portion of the first revolving drum or the second revolving drum. According to a sixth aspect of the present invention, there is provided an ozone gas reaction tank according to any one of the first to fifth aspects, wherein the ozone gas reaction vessel comprises a reaction tube, a gas vent tube provided inside the reaction tube, and the gas vent tube. A gas vent valve provided at an upper portion of the reaction tube, an opening of the gas vent tube is opened at a predetermined position of the reaction tube, and a reaction supply tube for supplying hot water to the reaction tube is provided with the gas vent tube. The invention according to claim 7 is arranged so as to be located higher than the opening of A gas purifier is connected to the discharge pipe of the drain valve, and the gas purifier is filled with activated carbon that adsorbs ozone gas, a reducing agent that reacts with ozone gas, and the like. The apparatus for purifying bath water according to any one of Items 1 to 7, includes an air pump, and is configured such that compressed air is directly injected from the air pump into the bath water in the bathtub.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a schematic perspective view of a bath hot water purification device according to the present embodiment. The bath hot water purification device according to the present embodiment includes a filtration device 1, a water pump 8, an activation device 10,
The apparatus includes an ozone gas mixing device 20, an ozone gas reaction tank 40, an air pump 60, and the like.

The filtration device 1 is described in Japanese Utility Model Application Laid-Open No. 6-48893 proposed by the present applicant, and therefore is not described in detail, but includes a filtration tank 2. And
A plurality of tubular filters 3, 3,... Are housed inside. Above the filtration tank 2, a filtration supply pipe a for hot water whose one end is open to the bathtub is connected, and below it, a filtration discharge pipe b is connected. And this filtration discharge pipe b
Is connected to the suction port 7 of the water pump 8. Therefore, when the water pump 8 is started, the bath water in the bathtub (not shown) is sucked into the filtration device 1 from the filtration supply pipe a and exits from the filtration discharge pipe b. During this time, solid matter such as human hair in the bath water is removed.

The activating device 10 is also disclosed in Japanese Utility Model Laid-Open No. Hei 6-48893 and Japanese Patent Laid-Open No. Hei 7-185574 proposed by the present applicant.
No. 6-23203, etc.,
Although not described in detail, an activation tank 11 is provided therein, and activated stones 12 such as shell fossils, barley stone, and ceramics are provided therein.
Is stored. An activation supply pipe c is attached to the bottom thereof, and one end of the filtration supply pipe c is
It is connected to the discharge port 9 of the water pump 8. An activation discharge pipe d is connected to the top of the activation tank 11, and the activation discharge pipe d serves as a mixing supply pipe e and is connected to an ozone gas mixing device 20d described below.

The ozone gas mixing device 20 has a revolving drum. In the present embodiment, the revolving torso includes a first revolving torso 21 and a second revolving torso 31 as shown in FIG. 2 in an enlarged manner. The first revolving drum 21 has a substantially cylindrical shape as a whole, and one is closed by a side wall 23. The other is open, and a flange 24 extending outward is integrally formed on the periphery thereof. The mixing supply pipe e for supplying the bath water to the first rotating body 21 is provided substantially in a tangential direction on the cylindrical portion 22 of the first rotating body 21. Therefore, when the bath water is supplied from the mixing supply pipe e to the first turning cylinder 21, the bath water turns within the first turning cylinder 21, and a negative pressure region is formed at the center. Then, an ozone gas supply pipe A made of, for example, a silicon pipe is provided so as to open from the side wall (23) of the first rotating body 21 to this negative pressure region. As shown in FIG. 1, a check valve 23, an electromagnetic on-off valve 24, an ozone gas generator 25, and the like are interposed in the ozone gas supply pipe A, and connected to a compressed air discharge pipe B of an air pump 60. ing. As described above, in the present embodiment, since the ozone gas supply pipe A is connected to the compressed air discharge pipe B, the ozone gas is forcibly mixed into the bath water.

The second revolving drum 31 forms a pair with the first revolving drum 21, and has the same size and shape as the first revolving drum 21, and has a substantially cylindrical shape as a whole. Is closed by a side wall 33. A flange 34 is formed integrally with the periphery of the other opening. A mixing / discharging pipe f through which the swirled bath water flows out is provided in the cylindrical portion 32 of the second rotating body 31 in a substantially tangential direction. The first revolving drum 21 and the second revolving drum 3 thus configured
1, the flanges 24, 34 butt against each other with a partition wall 35 interposed therebetween, and bolt nuts 36, 36,
… Are integrated by tightening. The partition 35 separates the first revolving drum 21 and the second revolving drum 31, and has an opening 37 in the center as shown in FIG. Therefore, the bath water swirled in the first swirling body 21 enters the second swirling body 31 through the opening 37, and also swirls also in the second swirling body 31 from the mixing and discharging pipe f as shown in FIG. The next ozone gas reaction tank 40 is discharged.

The ozone gas reaction tank 40 is provided with a vertical reaction tube 41 as shown in FIG.
A reaction supply pipe g connected to the mixing and discharging pipe f is provided near the upper part of the reaction tube 41. The reaction supply pipe g is provided in the reaction tube 41 in a tangential direction, and opens into the reaction tube 41. Therefore, the bath water supplied from the reaction supply pipe g turns in the reaction tube 41. At a position near the lower part of the reaction tube 41, a partition 43 having a plurality of through holes 42, 42,... Is provided. The reaction discharge pipe h is attached to the peripheral wall of the hot water collection chamber 44 so as to open. The other end of the reaction discharge pipe h opens directly into a bath (not shown).

The upper part of the reaction tube 41 is closed by a lid 45. Then, a predetermined length of gas vent tube 4 is attached to the lid 45.
6 is attached. The gas vent tube 46 is connected to the reaction tube 41
The opening 47 at the lower end thereof is located below the mounting position of the reaction supply pipe g. Therefore, ozone gas, air, and the like in the bath water supplied from the reaction supply pipe g are not discharged from the gas vent pipe 46 in a short-circuit manner. The gas vent tube 46 protrudes upward from the lid 45, and is provided with a gas vent valve 48. A commercially available product is applied to the gas vent valve 48, and a gas discharge pipe C made of, for example, a silicon pipe is connected to a top portion thereof. A conventionally known check valve 49, an electromagnetic on-off valve 49 ', a gas purification device 50, and the like are interposed in the gas discharge pipe C. The gas purification device 50 is filled with activated carbon that adsorbs ozone gas, a reducing agent that reduces ozone gas, and the like.

The compressed air discharge pipe B of the air pump 60 has:
As shown in FIG. 1, the solenoid on-off valve 61 and the check valve 6
2 are interposed and open at predetermined positions in a bathtub not shown.

Next, the operation of the above embodiment will be described. Although not shown in the figure, for example, the control unit of the power supply is set to be automatic, and the mixing time of the ozone gas is set. Then, when the ozone gas mixing time comes, the water pump 8 is started, and the electromagnetic on-off valve 24 of the ozone gas supply pipe A and the electromagnetic on-off valve 49 ′ of the gas discharge pipe C are turned on and opened. Also,
The air pump 60 and the ozone gas generator 25 are also energized and activated. The bath water in the bath is supplied from the filtration supply pipe a to the filtration device 1 and flows to the water pump 8, the activation device 10, the ozone gas mixing device 20, and the ozone gas reaction tank 40 below.
Then, the gas is directly returned from the ozone gas reaction tank 40 to the bath tank via the reaction discharge pipe h.

At this time, in the filtration device 1, as disclosed in the above-mentioned gazette proposed by the present applicant,
Solid matter such as human hair in the bath water is filtered, and the bath water is purified and adjusted in the activation device 10.

Further, in the ozone gas mixing device 20,
The bath water supplied from the mixing supply pipe e into the first turning cylinder 21 turns. The bath water swirled in the first swirling body 21 is
5 into the second swirling cylinder 31 through the opening 37,
The turning body 31 also turns. Then, it exits from the mixing discharge pipe f. Since the bath water turns in the first and second turning cylinders 21 and 31, a negative pressure region is formed in the center. Therefore, the ozone gas generated by the ozone gas generator 25 and the remaining air that did not become the ozone gas are self-primed from the ozone gas supply pipe A into the negative pressure region, and are mixed into the bath water.

The bath water into which ozone gas has been mixed is sent under pressure to the next ozone gas reaction tank 40. Ozone gas reaction tank 40
In the above, the bath water supplied from the reaction supply pipe g rotates inside the reaction tube 41. When turning, the reaction of the ozone gas is promoted, microorganisms, Legionella bacteria, etc. in the bath water are sterilized, and malodors are deodorized. Organic substances having a large molecular weight that bacteria cannot decompose are decomposed by ozone gas. The bath water treated with the ozone gas in this way passes through the through holes 42, 42,.
And returns to the bath from the reaction discharge pipe h. The bath water returned to the bathtub contains a large amount of ozone gas as dissolved oxygen,
It helps the aerobic bacteria growing in the activation device 10 to grow, and the bacteria further promote purification. Thereby, the bath water is maintained in a clean state.

Since the bath water swirls in the reaction tube 41, gas OG such as ozone gas and air having a small specific gravity that has contributed to the reaction is collected in the center by the action of the centrifugal force. The gas is discharged to the outside through the gas vent valve 48. At this time, the ozone gas is subjected to treatment such as adsorption by activated carbon or the like of the gas purification device 50. Thus, the ozone gas is not discharged to the outside and emits an irritating odor. When the processing with the ozone gas is performed for the set time, the water pump 8, the ozone gas generator 25, the electromagnetic on-off valve 2
4th class stops. It is clear that when the air pump 60 is activated, the electromagnetic on-off valve 61 in the compressed air discharge pipe B can be turned on to inject compressed air into the bathtub.

The present invention can be implemented in various forms without being limited to the above embodiment. For example, a ceramic heater may be provided as a heater, and the ceramic heater may be controlled by a control device so that the temperature of the bath water is always maintained at a predetermined temperature so that the user can enjoy bathing at any time. Also,
The arrangement order of the filtration device 1, the water pump 8, the activation device 10, the ozone gas mixing device 20, and the ozone gas reaction tank 40 is not limited to the above-described embodiment. For example, the activation device 10 may be provided downstream of the ozone gas reaction tank 40. Can also be provided. Further, the present invention can be implemented without the gas purification device 50. At this time, the gas discharge pipe C of the ozone gas reaction tank 40
Is desirably taken out of the bathroom so that ozone gas does not enter the bathroom.

The first and second revolving drums 21, 31 of the ozone gas mixing device 20 can also be constituted by one revolving drum. At this time, the mixing supply pipe e and the mixing outlet pipe f are desirably provided so as to be shifted from each other in the axial direction of the revolving drum so that the bath water does not short circuit. The ozone gas supply pipe A is connected to the second
It can also be provided from the side wall 33 side of the revolving drum 31. Furthermore, if the opening of the ozone gas supply pipe A faces the negative pressure region, the cylindrical part 2 of the first and second revolving drums 21 and 31 can be used.
It can also be provided on the 2, 32 side. Further, according to the present embodiment, since the ozone gas mixing device 20 includes the first and second revolving drums 21 and 31, a large negative pressure region is formed inside the revolving drums 21 and 31. Is done. Therefore, it is also possible to use a self-priming method to suck ozone gas.

[0023]

As described above, according to the present invention, a filtering device, an activating device, a water pump and the like are provided, and when the water pump is driven, the hot water in the bathtub is converted into a bathtub, a filtering device, an activating device, and the like. A bath water purifying apparatus in which the bath water is subjected to a treatment such as filtration and purification during that time, further comprising an ozone gas mixing apparatus for mixing ozone gas into the bath water, and an ozone gas mixing apparatus. And an ozone gas reaction tank for accelerating the reaction of the ozone gas mixed therein, so that the bath water containing the ozone gas is returned to the bathtub through the ozone gas reaction tank. The bath water is more effectively sterilized by ozone gas, organic substances are decomposed, and malodors are deodorized. Further, the ozone gas more effectively exerts actions such as sterilization, decomposition, deodorization, etc., and becomes an oxygen gas, thereby reducing the amount of the ozone gas. Furthermore, the ozone gas becomes dissolved oxygen in the ozone gas reaction tank, which assists the propagation of aerobic bacteria growing in the activation device, thereby further promoting the purification by the bacteria. According to the second aspect of the present invention, the bath water purifying apparatus further comprises an ozone gas mixing device for mixing ozone gas into the bath water, and an ozone gas reaction tank for accelerating the reaction of the ozone gas mixed by the ozone gas mixing device. And a heater and a control device, the bath water mixed with ozone gas is configured to return to the bath bath through the ozone gas reaction tank, and the mixing of ozone gas, the temperature of the bath water, and the like are controlled by the control device. In addition to the above-described effects, the bath water is always filtered and purified, and is heated to a predetermined temperature. According to yet another aspect of the present invention, an ozone gas mixing device includes a swirling body, a mixed supply pipe for supplying bath water to the swirling body, a mixed discharge pipe for discharging the bath water swirled in the swirling body, and an ozone gas for supplying ozone gas. The mixing supply pipe and the mixing discharge pipe are provided substantially tangentially to the body of the revolving drum, and the ozone gas supply pipe is opened substantially at the center of the revolving drum. The bath water that has entered the body turns, forming a large negative pressure area in the center.
Therefore, according to the present invention, the effect of ozone gas being self-absorbed in a large amount in the negative pressure range and being mixed into the bath water is further enhanced. In addition, the ozone gas mixing device has no moving parts, and an effect that can be used semipermanently is obtained. According to another aspect of the present invention, the reactor includes a reaction tube, a gas vent tube provided inside the reaction tube, and a gas vent valve provided at an upper portion of the gas vent tube. The reaction supply pipe which opens at a predetermined position of the cylinder and supplies the bath water to the reaction cylinder is located above the opening of the gas vent pipe, so that the mixed ozone gas sterilizes and purifies the bath water. It is more effectively used for deodorization. According to still another invention, a gas purifier is connected to the discharge pipe of the gas vent valve, and the gas purifier is filled with activated carbon that adsorbs ozone gas, a reducing agent that reacts with ozone gas, and the like. There is no possibility that the ozone gas that did not participate in the reaction is washed away to the outside and emits an irritating odor. According to another aspect of the present invention, the air pump is provided, and the bath water in the bathtub is configured so that the compressed air is directly injected from the air pump, so that the air is injected into the bathtub regardless of the ozone gas. Then, the bath water can be aerated with air, and the air bath can be enjoyed.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an embodiment of the present invention.

FIG. 2 is a view schematically showing an embodiment of an ozone gas mixing apparatus according to the present invention, wherein (a) is a perspective view and (b) is a schematic sectional view thereof.

FIG. 3 is a perspective view schematically showing an embodiment of an ozone gas reaction tank according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Filtration apparatus 8 Water pump 10 Activator 20 Ozone gas mixing apparatus 21 1st revolving body 25 Ozone gas generator 31 2nd revolving body 40 Ozone gas reaction tank 46 Degassing tube 48 Gas venting valve 50 Gas purification device 60 Air pump

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 510 C02F 1/50 531R 520 540A 531 550H 540 560A 550 560Z 560 560H 3/06 ZAB F24H 9/00 W 3/06 ZAB B01D 35/02 J F24H 9/00 53/34 120B

Claims (8)

[Claims] 1. A filter device, an activation device, a water pump and the like are provided, and when the water pump is driven, hot water in a bathtub circulates between the bathtub, the filtration device, the activation device, and the like. A bath hot water purifying apparatus, wherein the bath hot water is subjected to processes such as filtration and purification, wherein the bath hot water purifying apparatus further includes an ozone gas mixing apparatus for mixing ozone gas into the bath hot water, An ozone gas reaction tank for accelerating the reaction of the ozone gas mixed by the ozone gas mixing device, wherein the bath water mixed with the ozone gas is configured to return to the bath tank through the ozone gas reaction tank. Bath water purifier. 2. A filter device, an activation device, a water pump and the like are provided, and when the water pump is driven, hot water in a bathtub circulates between the bathtub, the filtration device, the activation device, and the like. A bath hot water purifying apparatus, wherein the bath hot water is subjected to processes such as filtration and purification, wherein the bath hot water purifying apparatus further includes an ozone gas mixing apparatus for mixing ozone gas into the bath hot water, An ozone gas reaction tank for promoting the reaction of the ozone gas mixed by the ozone gas mixing device, a heater, and a control device,
The bath containing the ozone gas is configured to return to the bath through the ozone gas reaction tank, and the mixing of the ozone gas, the temperature of the bath, and the like are controlled by the control device. Hot water purifier. 3. An apparatus for purifying bath water, wherein the ozone gas mixing device according to claim 1 or 2 is provided downstream of the activation device. 4. The ozone gas mixing apparatus according to claim 1, wherein the swirling body, a mixing supply pipe for supplying bath water to the swirling body, and a bath water swirled in the swirling body. And an ozone gas supply pipe for supplying ozone gas. The mixture supply pipe and the mixture discharge pipe are provided substantially tangentially to the body of the revolving body, and the ozone gas supply pipe is A bath water purification device that opens at the approximate center of the trunk. 5. The revolving drum according to claim 4, comprising a first revolving drum and a second revolving drum, these revolving drums are connected in series, the central portion thereof is open, and the mixing supply pipe is connected to the revolving drum. The mixing and discharging pipe is provided on the first revolving drum substantially tangentially to the second revolving drum, and the ozone gas supply pipe is opened at a substantially central portion of the first revolving drum or the second revolving drum. , Bath water purification device. 6. The ozone gas reaction tank according to any one of claims 1 to 5, wherein a reaction tube, a gas vent tube provided inside the reaction tube, and an upper portion of the gas vent tube are provided. An opening of the gas vent tube is opened at a predetermined position of the reaction tube, and a reaction supply tube for supplying hot water to the reaction tube is above the opening of the gas vent tube. Bath water purification device located in 7. A gas purifying device is connected to the discharge pipe of the gas vent valve according to claim 6, and the gas purifying device is filled with activated carbon that adsorbs ozone gas, a reducing agent that reacts with ozone gas, and the like. , Bath water purification device. 8. The bath water purifying apparatus according to claim 1, further comprising an air pump, wherein compressed air is directly injected from the air pump into the bath water in the bathtub. Bath water purification device configured as follows.