JPH04300553A - Bathtub equipment - Google Patents

Abstract

PURPOSE:To give the constant comfortable blow sense and the massage effect to a bathing person by constituting the equipment so that end parts of a water suction piping and a water supply piping, and an end part of a water discharge piping are allowed to communicate with and connected to the lower stage impeller chamber of a circulating pump of a plural stage impeller type, and the upper impeller chamber, respectively. CONSTITUTION:A bathtub equipment A is provided with a circulating pump P of a plural stage impeller type, and between a bathtub maim body 1 and the lower stage impeller chamber 31 of the circulating pump P, the tip of a water suction piping 2 and the base end of a water supply piping 3 are allowed to communicate with and connected and a bath hot water circulating passage 4 is formed. Also, the base end of a water discharge piping 7 is allowed to communicate with and connected to the upper stage impeller chamber 30 of the circulating pump P, so that bath hot water can be discharged from a tip water discharge port 7a positioned in the upper part than the water level in the bathtub main body 1 Between the water supply piping 3 and the water discharge piping 7, a passage control means is provided, by which a simultaneous operation of a blow operation and a discharge operation or a single operation of one of them can be executed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub device capable of discharging bath water toward the shoulders of a bather.

0002

[Prior Art] Conventionally, a blow operation in which bath water is spouted into the bathtub body and a discharge blow operation in which bath water is discharged from above the water surface into the bathtub body (so-called shoulder blow operation) have not been carried out at the same time. As a bathtub device designed to
For example, there is one described in Japanese Utility Model Application Publication No. 2-130639.

[0003] Such a bathtub device has a bathwater circulation flow path consisting of a water suction pipe and a water supply pipe interposed between the bathtub body and the circulation pump, so that bathwater can be spouted into the bathtub body, and A base end of a water discharge pipe whose distal end outlet is located above the interior of the bathtub body is connected to the water supply pipe via a switching valve.

[0004] In this way, by operating the switching valve, one or both of the blowing operation and the discharge blowing operation can be performed.

[0005]

[Problems to be Solved by the Invention] However, in the case of the bathtub device described above, if the switching valve is operated during blowing operation, the amount and pressure of the hot water jetted change, and the blowing sensation for the bather changes. There is a problem in that it gives a feeling of discomfort to bathers who are enjoying bathing.

In particular, during the discharge blow operation, there is a problem in that pressure loss occurs due to the switching valve attached to the water discharge pipe, and sufficient discharge pressure cannot be obtained, resulting in a low massage effect.

[0007] Furthermore, since the bath water discharged from the outlet is used by circulating the bath water inside the bathtub body through the water suction piping and water discharge piping using a circulation pump, the bath water may become dirty due to long-term use. There is also the problem that if hot water is discharged from the outlet and directly hits the bather's face, the bather will feel uncomfortable.

[0008]

[Means for Solving the Problems] Therefore, in the present invention, a bath water circulation flow path consisting of a water suction pipe and a water supply pipe is interposed between the bathtub body and the circulation pump, so that the bath water can be heated inside the bathtub body. In a bathtub device capable of spouting water, the circulation pump is a multi-stage impeller type pump in the water suction pipe, and the tip of the water suction pipe and the base end of the water supply pipe are connected to the lower impeller chamber of the circulation pump, respectively, and the same is connected to the lower impeller chamber of the circulation pump. A base end of a water discharge pipe whose tip discharge port is located above the water surface in the bathtub body is connected to the upper impeller chamber of the circulation pump, and
It is an object of the present invention to provide a bathtub device characterized in that a filter is attached to a water discharge pipe, and bath water filtered by the filter is discharged from a distal end outlet.

The present invention is also characterized by the following configuration.

[0010] A flow path control means is provided between the water supply pipe and the water discharge pipe, and the flow path control means performs a blow operation in which bath water is spouted into the bathtub body through the water supply pipe and a tip discharge of bath water through the water discharge pipe. It is possible to simultaneously operate the discharge blow operation for discharging from the outlet, or to operate either of them independently.

[0011] A drain pipe is connected to a portion of the water discharge piping located between the circulation pump and the filter via a first three-way valve, and one end is connected to a portion of the water discharge piping located downstream of the filter mounting position. The other end of the filtration/backwashing pipe connected to the water supply pipe is connected via a second three-way valve, and a branch pipe is formed on the tip side of the water supply pipe, and the tip of the branch pipe is connected to the foot of the bathtub body. The first and second on-off valves are connected to the side walls and the back side respectively, and the first and second on-off valves are attached to each branch pipe, and the switching operation of the first and second three-way valves and the opening and closing operation of the first and second on-off valves are performed. By combining the following, the following operations can be performed.

■Blow operation in which bath water is spouted into the bathtub body from at least one of the foot side or the back side.

■Discharge blow operation in which bath water is discharged from the tip discharge port.

(2) Filtration operation in which bath water is filtered by a filter during blowing operation.

■ Simultaneous operation of blow operation and discharge blow operation.

[0016] ■ Backwash operation in which the filter is washed by flowing bath water back into the filter.

[0017]

[Operation] Blow operation that squirts bath water into the bathtub body is
By operating the circulation pump, bath water in the bathtub body can be sucked through the water suction pipe and can be jetted into the bathtub body through the water supply pipe.

[0018] In addition, the discharge blow operation in which bath water is discharged from the tip discharge port can also be performed by operating the circulation pump.
In addition to inhaling the bath water inside the bathtub body through the water absorption pipe,
The water is discharged through the spout piping and from the outlet at the end into the bathtub body, for example towards the shoulders of the bather (so-called shoulder blow).
You can do it by letting them do it.

At this time, a multi-stage impeller type pump is used as the circulation pump, and the tip of the water suction pipe and the base end of the water supply pipe are connected to the lower stage impeller chamber of the circulation pump, and the upper stage impeller chamber of the circulation pump is connected. Because the base end of the water discharge piping is connected to the base end of the water discharge pipe, the pressure of the bath water that has been increased in the lower impeller chamber can be further increased in pressure in the upper impeller room. Since it can be discharged from the tip outlet, the blow feeling can be kept constant even when the operation is changed, and the bather who is enjoying the blow bath will not feel uncomfortable.

[0020] Furthermore, the discharge blowing operation can provide a sufficient massage effect on the shoulders and the like of the bather.

[0021] Furthermore, by attaching a filter to the water discharging piping and discharging clear bath water that has been filtered by the filter from the dispensing outlet even during long-term use, the water can be directly sprayed onto the bather's face, etc. Even in the case of contact, it is possible to prevent the bather from feeling uncomfortable and provide a comfortable bathing experience.

A flow path control means is provided between the water supply pipe and the water discharge pipe, and the flow control means performs a blow operation to discharge the bath water into the bathtub body through the water supply pipe, and a blow operation to discharge the bath water through the water discharge pipe 7 to the tip. By making it possible to simultaneously operate the discharge blow operation for discharging from the discharge port or to operate either one of them independently, it is possible to provide a blow according to the preference of the bather.

Specifically, a drain pipe is connected via a first three-way valve to a portion of the water discharge piping located between the circulation pump and the filter, and a drain pipe is connected to a portion of the water discharge piping located downstream of the filter mounting position. A filtration system with one end connected to the water supply pipe is installed on the side.
The other end of the backwashing pipe is connected via a second three-way valve, a branch pipe is formed at the tip of the water supply pipe, and the tip of the branch pipe is connected to the foot and back side walls of the bathtub body, respectively. Connect them for communication, install the first and second on-off valves on each branch pipe,
By combining the switching operations of the first and second three-way valves and the opening and closing operations of the first and second on-off valves, a blow operation and a discharge blow operation that blow out bath water from at least one of the back side and foot side of the bathtub body and filtration are performed. In addition to operation, it is possible to perform a backwash operation in which bath water flows back through the filter to clean the filter.This backwash operation allows the filter to function normally and ensures that the bath water is can be filtered to provide a comfortable blow bath with always clear water.

[0024]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

A shown in FIG. 1 is a bathtub device according to the present invention, and the bathtub device A is equipped with a two-stage impeller type pump, which is a type of multi-stage impeller type pump, as a circulation pump P. Between the main body 1 and the lower impeller chamber 31 of the circulation pump P, a water suction pipe 2 and a water supply pipe 3 are interposed to form a bath water circulation passage 4, and an air intake part 5 is connected to the water supply pipe 3 to supply air. They are connected via piping 6 to enable spraying of bath water mixed with air bubbles into the bathtub body 1 (Figs. 2 and 3).
reference).

Moreover, the base end of the water discharge pipe 7 is connected to the upper impeller chamber 30 of the circulation pump P, and the distal end outlet 7a of the water discharge pipe 7 is connected to the headrest 1c provided in the bathtub body 1, which will be described later. It opens on the left and right sides, and a filter F is installed in the same discharge pipe 7.
is attached so that the bath water filtered by the filter F can be discharged from the distal end discharge port 7a. 32 is an upper stage impeller, 33 is a lower stage impeller, and 34 is an impeller shaft.

A flow path control means is provided between the water supply pipe 3 and the discharge pipe 7, and the flow path control means is located between the circulation pump P and the filter F of the water discharge pipe 7. In addition, the drain pipe 8 is connected in communication via the first electromagnetic three-way valve V1, and one end of the water discharge pipe 7 is connected in communication with the water supply pipe 3 at a location downstream of the filter installation position. The other end of the water supply pipe 9 is connected to the bathtub body 1 via a second electromagnetic three-way valve V2, and branch pipes 3a and 3b are formed on the tip side of the water supply pipe 3, and the tips of the branch pipes 3a and 3b are connected to the bathtub body 1 Each branch pipe 3 is connected to the foot side and dorsal side walls of the
a, 3b, respectively electromagnetic first and second on-off valves V3,
V4 is installed, and the following operations can be performed by combining the switching operations of the first and second three-way valves V1 and V2 and the opening and closing operations of the first and second on-off valves V3 and V4.

■Blow operation in which bath water is spouted into the bathtub body 1 from at least one of the foot side or the back side.

(2) Discharge blow operation in which bath water is discharged from the tip discharge port 7a.

(2) Filtration operation in which bath water is filtered by filter F during blowing operation.

■ Simultaneous operation of blow operation and discharge blow operation.

[0032] ■Backwash operation in which the filter is washed by flowing bath water back into the filter.

Furthermore, one end of a fume pipe 13 is connected to the bottom 1e of the bathtub body 1, and a compressor C is connected to the fume pipe 13, and an oxygen enrichment membrane device G is installed upstream of the compressor C. is installed, air is sucked in from the other end of the fumarole pipe 13 and the oxygen content has been increased by the oxygen enrichment membrane device G (for example, air with an oxygen content of 32%),
The water can be ejected from the bottom of the bathtub body 1. 14 is a check valve.

[0034] In this way, a jet blow operation in which air is jetted out from the bottom of the bathtub body 1 is also possible.

Further, a control section S is connected to the pump driving motor M of the circulation pump P via an inverter 10, so that the motor M can be controlled by the inverter.
The control section S includes first and second three-way valves V1, V2 and the first and second three-way valves V1 and V2.
The second on-off valves V3 and V4 are connected to the compressor C and the oxygen-enriching membrane device G, respectively, and the control unit S is operated at hand from the bathroom side wall adjacent to the bathtub body 1 or from the operation panel unit 11 attached to the bathtub body 1. Thus, each of the above operations can be performed selectively. 21 is a bath water pressure sensor that detects the discharge pressure of the bath water, and 22 is a bath water temperature sensor that detects the temperature of the bath water.

Next, each component will be explained.

As shown in FIGS. 2 and 3, the bathtub body 1 is formed into a box shape with an opening at the top, and has a brim-like edge 1a having a constant width around the periphery, so that only the rear wall is accessible to the bather. The backrest part 1b is formed in an inclined shape so that N can take a bath in an inclined position.The upper edge of the backrest part 1b has a headrest part 1c formed in the shape of a curved pillow that bulges upward. established,
The back of the head of the bather N can be hung on the head rest part 1c, and the left and right armrest parts 1d, 1d on which both arms of the bather N can be placed, respectively, are provided on the side walls.
It is formed in the shape of a bulge inward.

Two jet nozzles 1 for the foot side are installed on the front wall and the rear wall (backrest portion 1b) of the bathtub body 1, respectively.
5, 15 and dorsal side jet nozzles 16, 16 are attached, and shoulder jet nozzles 17, 16 are installed on the left and right sides of the head rest part 1c.
17 is attached, and a large number of jet nozzles 18 and a bath water outlet 20 are provided on the bottom portion 1e, and jet nozzles 19, 19 are also provided on the left and right armrest portions 1d, 1d, respectively.

[0039] Each jet nozzle 15, 15 for the foot side and the dorsal side.
, 16, 16, the ends of branch pipes 3a, 3b formed on the front end side of the water supply pipe 3 are connected to each other, and one end of the air supply pipe 6 is connected to the discharge nozzles 17, 17 for shoulder. connects the distal end outlet 7a of the water spouting pipe 7, one end of the air supply pipe 6, and connects the jet nozzle 18, 19 to the jet pipe 13.

[0040] Then, each jet nozzle 1 for the foot side and the dorsal side.
5, 15, 16, 16, and discharge nozzles 17, 17
Inside, the air sent out through the air supply pipe 6 is sucked into the bath water sent out through the water supply pipe 3 using the ejector effect, and further mixed, and
5, 15, 16, 16, and discharge nozzles 17, 17
This makes it possible to jet or discharge bathwater with more bubbles.

Further, the branch pipes 3a and 3b are respectively equipped with the first and second on-off valves V3 and V4, and by opening and closing the on-off valves V3 and V4, bath water is spouted from at least one of them. This enables blow operation.

Each jet nozzle 15, 15, 16, 16
, and the discharge nozzles 17, 17 can have the same structure.To explain the discharge nozzle 15 with reference to FIG. 4, the nozzle body support part 23 attached to the side wall of the bathtub body 1
, 24, 25, the nozzle body 15a is attached so as to be swingable vertically, horizontally, and diagonally, and inside the nozzle body 15a, a jet forming part 15b, an air mixing chamber 15c, a throat 15d, a water supply piping communication part 15e, and an air supply are installed. Piping communication part 1
5f is provided. 15g is air inlet, 15h
, 26 is a packing, 15i is a spacer, and 27 is a decorative cover.

The fume nozzle 18 provided on the bottom 1e of the bathtub body 1 and the fume nozzle 19 provided on the armrest portion 1d have the same structure, and to explain the fume nozzle 18, as shown in FIG. 5, it communicates with the fume piping 13. A connected nozzle main body 18a, a jet forming part 18b whose base end communicates with the nozzle main body 18a and whose distal end penetrates the bottom 1e (or armrest part 1d) of the bathtub main body 1, and the tip of the jet forming part 18b. Fumarole cover 1 installed in a covered state
It consists of 8c.

As shown in FIG. 6, the fume cover 18c is provided with a large number of fume holes 18d. 1
8e is a packing.

As the circulation pump P and the filter F, those described in Japanese Patent Application No. 2-16938 previously filed by the applicant can be used.

The oxygen enrichment membrane device G is disclosed in Japanese Unexamined Patent Application Publication No. 1986-
Those described in No. 16523 and JP-A-63-239101 can be used.

The embodiment of the present invention is constructed as described above, and according to this embodiment, the following operation modes can be selected.

That is, the operation modes that can be selected according to this embodiment are: (1) blow operation, (2) discharge blow operation, (2) filtration operation, (2) simultaneous operation of blow operation and discharge blow operation, (2) backwash operation, and (4) jet blow operation. Yes, circulation pump P, first three-way valve V1, second three-way valve V2, and compressor C,
The selection can be made by operating as shown in Table 1.

[0049]

[Table 1]

■Blow operation As shown in the first row of Table 1, the circulation pump P is turned on (operated), the first three-way valve V1 is switched so that a flow path is formed in the direction a shown in FIG. Figure 1 shows the second three-way valve V2.
By switching so that a flow path is formed in the direction c shown in FIG. 7, and opening at least one of the first and second on-off valves V3 and V4, a blow operation as shown in FIG. 7 can be performed.

At this time, compressor C is also turned on (operating).
It is also possible to perform the jet blow operation at the same time.

■Discharge blow operation As shown in the fifth row of Table 1, turn on the circulation pump P,
The first three-way valve V1 is switched so that a flow path is formed in direction b shown in FIG. 1, and the second three-way valve V2 is switched to c shown in FIG.
The switch is made so that a flow path is formed in the
By closing both second on-off valves V3 and V4,
A discharge blow operation as shown in FIG. 8 can be performed.

In such a discharge blow operation, since the filter F is installed in the middle of the water discharge pipe 7, the filter operation is also performed at the same time, and clear filtered bath water can be discharged.

At this time, also turn on compressor C,
Fumarole blowing operation can also be performed at the same time.

(2) Filtration Operation By performing the operations shown in the second row of Table 1, blowing operation and filtration operation as shown in FIG. 9 can be performed simultaneously.

[0056] At this time, also turn on compressor C,
Fumarole blowing operation can also be performed at the same time.

(1) Backwashing Operation By performing the operations shown in the third row of Table 1, the blowing operation and backwashing operation as shown in FIG. 10 can be performed simultaneously.

[0058] At this time, also turn on compressor C,
Fumarole blowing operation can also be performed at the same time.

(2) Simultaneous operation of blow operation and discharge blow operation By performing the operations shown in the fourth row of Table 1, the blow operation and discharge blow operation as shown in FIG. 11 can be performed simultaneously.

[0060] At this time, also turn on compressor C,
Fumarole blow operation can also be performed at the same time.

(2) Fumes Blowing Operation By performing the operations shown in the sixth row of Table 1, the fumes blowing operation as shown in FIG. 12 can be performed.

Each of these operations can be easily performed by manually operating an operation selection switch provided on the operation panel section 11.

As described above, according to the bathtub device A according to the present embodiment, the bather can freely select various operation modes according to his/her preference, and moreover, the bathtub device A is equipped with a filtration mode. Because it is equipped with filter F, the bath water can always be kept clear even when used for a long time, and in particular, only the bath water that has been filtered by filter F is discharged from the discharge nozzle 7, so that it is safe for bathers. can provide a comfortable bathing experience.

Furthermore, FIGS. 13 and 14 show structures of discharge nozzles as other embodiments, respectively.

That is, the discharge nozzle 17 shown in FIG. 13 is capable of spouting foamy bath water, and the nozzle body 1
7a, a swirling flow forming part 17b and a foam forming part 17c
A water sprinkler plate 17d and a water pipe communication portion 17e are provided.

Further, the discharge nozzle 17 shown in FIG. 14 is capable of spouting bath water in the form of a spray.
A water passage portion 17b, a water sprinkling plate stay 17h, a water sprinkling plate 17d, and a water pipe communication portion 17e are provided in the water pipe 7a. 17f and 17g are packings.

Further, as the jet nozzles 15, 16 and the discharge nozzle 17, the patent application filed in 1986 by the applicant
It is also possible to use those described in Japanese Patent Application No. 331772, Japanese Patent Application No. 2-16388, and Japanese Patent Application No. 2-294740.

FIG. 15 shows a bathtub device A as another embodiment.
In the bathtub device A, the tip side of the discharge pipe 7 is branched into a plurality of branches to form branch water discharge pipes 7a and 7b, and the tip of each branch water discharge pipe 7a and 7b is connected to the headrest part of the bathtub body 1. It is connected in communication with a plurality of discharge nozzles 17, 17 attached to 1c.

The discharge nozzles 17, 17 are arranged as shown in FIG.
, FIG. 13, and FIG. 14, as any of the structures shown in FIG.
It is possible to discharge different forms of bath water, for example, bubbly bath water, foam bath water, and spray bath water, and the bather selects the discharge nozzle 17 to discharge the bath water of his choice. This makes it possible to obtain an appropriate massage effect.

[0070] V5 and V6 are branch water discharge pipes 7, respectively.
It is an electromagnetic three-way valve attached to the drain pipes 35 and 36 on one side, and the drain pipes 35 and 36 are connected to each other.
This makes it easier to drain water.

[0071] Furthermore, an electromagnetic on-off valve V7 is attached to the filtration/backwashing piping 9, so that filtration operation and backwashing operation can be performed by opening and closing the on-off valve V7.

In this way, in the bathtub device A, in addition to the various operation modes that can be selected in the bathtub device A according to the first embodiment, the plurality of discharge nozzles 17, 17
A desired massage effect can be obtained by discharging different types of bath water selectively or simultaneously.

[0073]

[Effects] According to the present invention, the following effects can be obtained.

■A multi-stage emperor type pump is used as the circulation pump, and sufficiently pressurized bath water is discharged from the tip outlet through the discharge piping, so the blowing sensation changes even when the operation is changed. It provides a consistent and comfortable blow feeling and massage effect to the bather, and can accommodate complex blow variations.

■Since a multi-stage emperor pump is used as the circulation pump, the bathtub equipment itself is more compact and lower cost than when separate circulation pumps are provided for blow operation and discharge blow operation. The control load of the circulation pump can be reduced.

(2) Since the discharge blow is clear bath water filtered by a filter, it is possible to provide a comfortable bath without causing discomfort to the bather.

[0077] Since the blow operation and discharge blow operation can be operated simultaneously or either independently, the bather can enjoy blow bathing according to his or her preference.

■ A blow operation in which bath water is spouted from at least one of the foot side and the back side of the bathtub body, and a discharge blow operation;
In addition to filtration operation, backwash operation can be performed to clean the filter, so this backwash operation allows the filter to function properly and ensures that the bath water is filtered by the filter, ensuring that it is always clear. Comfortable blow bathing can be provided by spouting water.

[Brief explanation of drawings]

FIG. 1 is a conceptual explanatory diagram of a bathtub device according to the present invention.

FIG. 2 is a side view of the bathtub device.

FIG. 3 is a plan view of the bathtub device.

FIG. 4 is a cross-sectional side view of the jet nozzle.

FIG. 5 is a cross-sectional side view of the blowhole.

FIG. 6 is a plan view of the fumarole.

FIG. 7 is an explanatory diagram of blow operation.

FIG. 8 is an explanatory diagram of discharge blow operation.

FIG. 9 is an explanatory diagram of filtration operation.

FIG. 10 is an explanatory diagram of backwash operation.

FIG. 11 is an explanatory diagram of simultaneous operation of blow and discharge blow.

FIG. 12 is an explanatory diagram of a jet blow operation.

FIG. 13 is a cross-sectional side view of a discharge nozzle as another embodiment.

FIG. 14 is a cross-sectional side view of a discharge nozzle as another embodiment.

FIG. 15 is a conceptual explanatory diagram of a bathtub device as another embodiment.

[Explanation of symbols]

A Bathtub device C Compressor F Filter machine G Oxygen enrichment membrane device V1 1st three-way valve V2 2nd three-way valve V3 1st on-off valve V4 2nd on-off valve 1　Bathtub body 2 Water absorption piping 3 Water supply piping 4 Bath water circulation flow path 7 Water discharge piping 7a　Tip discharge port 8 Drain pipe 9 Filtration/backwash piping 13 Fumarole piping

Claims (4)

[Claims] [Claim 1] Between the bathtub body 1 and the circulation pump P,
This bathtub is provided with a bath water circulation path 4 consisting of a water suction pipe 2 and a water supply pipe 3, so that bath water sucked from inside the bathtub body 1 through the water suction pipe 2 can be spouted into the bathtub body 1 through the water supply pipe 3. In the apparatus, the circulation pump P is a multi-stage impeller type pump in the water suction pipe 2, and the tip of the water suction pipe 2 and the base end of the water supply pipe 3 are connected to the lower impeller chamber 31 of the circulation pump P, respectively, and A bathtub device characterized in that an upper impeller chamber 30 of a circulation pump P is connected to a base end of a water discharge pipe 7 whose tip discharge port 7a is located above the water surface in the bathtub body 1. 2. The bathtub device according to claim 1, wherein a filter F is attached to the water discharge pipe 7, and the bath water filtered by the filter F is discharged from the tip discharge port 7a. 3. A flow path control means is provided between the water supply pipe 3 and the water discharge pipe 7, and the flow path control means performs a blow operation in which bath water is spouted into the bathtub body 1 through the water supply pipe 3, and a water discharge pipe. 2. The bathtub device according to claim 1, wherein a discharge blow operation in which bath water is discharged from the distal end discharge port 7a through the tube 7 can be operated simultaneously or independently. [Claim 4] Circulation pump P and filter F of water discharge piping 7
A drain pipe 8 was connected to the water supply pipe 3 through the first three-way valve V1, and one end of the water discharge pipe 7 was connected to the water supply pipe 3 downstream of the filter installation position. The other end of the filtration/backwashing pipe 9 is connected through the second three-way valve V2, and branch pipes 3a and 3b are connected to the tip side of the water supply pipe 3.
The tips of the branch pipes 3a, 3b are connected to the foot and back side walls of the bathtub body 1, respectively, and the branch pipes 3a, 3b are provided with first and second on-off valves V3, V, respectively.
4 is installed so that the following operations can be performed by a combination of switching operations of the first and second three-way valves V1 and V2 and opening and closing operations of the first and second on-off valves V3 and V4. Item 3. The bathtub device according to item 3. ■Blow operation in which bath water is spouted into the bathtub body 1 from at least one of the foot side or the back side. ■Discharge blow operation in which bath water is discharged from the tip discharge port 7a. ■Filtration operation in which bath water is filtered by filter F during blow operation. ■Simultaneous operation of blow operation and discharge blow operation. ■
Backwash operation in which bath water flows back into the filter F to wash the filter F.