JP2955786B2 - Bath 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 apparatus, and more particularly to a bath apparatus in which the temperature of hot water in a bathtub can be raised by a circulating heating system or a hot water bath system.

[0002]

2. Description of the Related Art As a bath apparatus of the above-mentioned type, a bath apparatus disclosed in Japanese Patent Application Laid-Open No. Hei. In this method, when the temperature of the hot water in the bathtub is increased by circulating heating or hot water, high-temperature water supplied into the bathtub diffuses into the bathtub from a base provided at the bottom of the bathtub. When the temperature of the hot water in the inside of the bath is raised to a predetermined temperature, the unevenness in the temperature in the upper part and the lower part in the bathtub can be eliminated.

However, in this conventional apparatus, the piping between the water heater and the bathtub is troublesome, and special processing is required for the bathtub, so that it is difficult to use the bathtub as it is already used. It is. Also, there is a problem that it is difficult to repair and check the piping between the water heater and the bathtub.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and the first invention is to provide a hot water supply device and a bathtub with a filling pipe (12) and a suction pipe (11). A bath apparatus of the type that can increase the temperature of hot water in the bathtub from the water heater side while circulating hot water in the bathtub by connecting with a heating circuit having It is possible to use the existing bathtub with a part to make a bath device that can eliminate temperature unevenness in the upper and lower parts, and to simplify the work of connecting the piping between the water heater and the bathtub and repair and inspection of these. , In addition, the hot water in the bathtub from the water heater side,
It is an object of the present invention to discharge the heat without passing through a heat exchanger that is a part of the temperature raising circuit. The second invention is "The hot water supply type water heater and the bathtub are filled with hot water.
(12) a bath apparatus of the type that can be connected by a single heating circuit having a temperature and that can raise the temperature of hot water in the bathtub by hot water from the water heater side ”. It is to solve the problem.

[0004]

[0005]

[Technical Means] The technical means of the first invention for solving the above-mentioned problem is that "the bathtub (B) is provided on the side wall of the bathtub (B).
Connection bases (13) that are separately connected to 2) and suction pipe (11)
(17) is provided, and an upper chamber (26) having a plurality of discharge ports (25) (25) on the upper surface is provided at the bottom of the bathtub (B).
a) and a lower chamber (26b) having a plurality of suction ports (21) and (21) on the lower surface.
And the connecting terminal (13) of the relay device and the upper chamber (26a) are connected to a supply extension pipe.
(42) and the connection base (17) and the lower chamber
(26b) and an extension pipe (41) for suction, a pump (P) is inserted into the suction pipe (11) in the water heater (1), and a drain valve (16 (19)
A switching valve (K) that is closed at the time of drainage is inserted downstream of the branch of the drain pipe (19) in the pump discharge direction and upstream of the bath heat exchanger. It is that.

[0006]

The technical means of the first invention operates as follows. Connection base for relay (3) provided on the side wall of bathtub (B)
(13) Connect (17) and water heater (1) with hot water pipe (12) and suction pipe (1).
1), the connection fitting and the terminal are connected by a supply extension pipe (42) and a suction extension pipe (41), respectively, so that the inside of the bathtub (B) and the inside of the water heater (1) are connected. The circulating circuit for raising the temperature is connected in communication. In addition, during reheating by circulation heating, high-temperature hot water diffuses upward from the plurality of discharge ports (25) (25) formed on the upper surface of the upper chamber (26a).

[0007] Therefore, temperature unevenness in the bathtub hardly occurs.
At the time of drainage, when the drain valve (16) is opened and the pump (P) is operated, the inside of the bathtub (B) communicates with the drain pipe (19), and the water is drained from the water heater (1) side. You. At this time, the on-off valve
Since (K) is closed, the remaining hot water drawn from the bathtub (B) by the pump (P) does not reach the bath heat exchanger.

[0008]

[0009]

[0010]

[0011]

[Technical Means] The technical means of the second invention which has been taken to solve the above-mentioned problem is that "a relay tool (3) having a pair of connection bases (13) and (17) on a side wall of a bathtub (B)". A terminal device (2) communicating with the inside of the bathtub (B) is arranged at the bottom of the bathtub (B),
The hot water pipe (12) is connected to the terminal device (2) through the connection base (13) and an extension supply pipe (42) that is connected to the connection base (13), and is connected to the water heater (1) and the relay. Along with the tool (3), a suction pipe (11) is provided separately from the filling pipe (12),
A drain pump (P) is inserted into the suction pipe (11) inside the water heater (1), and the discharge side of the drain pump (P) The drain pipe (19) into which the valve (16) is inserted is connected and connected, and the suction pipe is connected to the relay tool.
(3) Connection base (17) and extension tube for suction connected to this connection base
(41) and is connected to the terminal device (2). "

[0012]

The above technical means of the second invention operates as follows. Since the water heater is a hot water bath type, the relay (3)
High-temperature hot water supplied to the terminal fixture (2) through the bathtub (B)
Diffuses from the bottom to the top. In addition, when draining the remaining hot water in the bathtub (B), the suction pipe (11), drainage pipe (19), and suction extension pipe (41 )
The water is discharged from the water heater side by a drainage pump (P) through a drainage circuit consisting of: Therefore, the remaining hot water does not pass through the heating circuit including the filling pipe (12) to which the high-temperature hot water is supplied and the extension supply pipe (42) when the temperature in the bathtub (B) is raised.

[0013] In the second invention, the "terminal device (2)
Is a terminal device placed and used on the bottom of the bathtub, the inside of which is communicated with the hollow body partitioned into an upper chamber (26a) and a lower chamber (26b), and A first hose end (27a) to which an extension pipe (42) can be connected; and a plurality of discharge ports (25) and (25) provided on the upper surface of the upper chamber; A terminal device having a second hose end (27b) to which an extension pipe for suction (41) can be connected, and a plurality of suction ports (21) (21) provided on the lower surface of the lower chamber. ], The hot water is discharged upward from the discharge ports (25) and (25) when hot water is supplied, so that the hot water is more easily diffused into the bathtub. Further, at the time of drainage, since the water is sucked from the plurality of suction ports (21) (21) on the lower surface of the lower chamber (26b), the remaining hot water in the bathtub can be reliably sucked and discharged.

In the above invention, "the plug (22) which fits into the drain port in the bathtub (B) is provided on the lower surface of the terminal (2)". When the plug is inserted into the drain of the bathtub (B), the stopper (22) is fixed to the drain of the bathtub (B). Further, the bath apparatus of the present invention can be very easily applied to a normal bathtub (B) already used.

The first and second inventions described above have the following specific effects. . In a device that heats the inside of the bathtub from the bottom of the bathtub (B), a relay (3) and a water heater (1) arranged on the side wall of the bathtub (B)
The connection of the heating circuit from the bathtub (B) to the water heater can be established by piping work with the water heater, so the water heater can be connected from the bottom side of the bathtub (B).
The piping connection work is simpler than in the case of directly connecting the heating circuit to (1). Repair and inspection of this circuit is also easy. . Since the bottom of the bathtub (B) is not specially processed and a base or the like is not attached, a conventional bathtub can be used as it is. . The entire piping connection of the heating circuit from the bottom of the bathtub (B) to the hot water heater (1) was performed by connecting the piping between the relay (3) and the water heater (1), and from the relay (3) to the terminal. It can be divided into pipe connection work to the fixture (2) (or work to connect the extension pipe equipped with the terminal fixture (2) to the relay fixture (3)), so that the piping work of the entire heating circuit is easy It is. . The high-temperature hot water supplied when the temperature in the bathtub (B) rises diffuses upward from the terminal (2) at the bottom of the bathtub (B).
Less uneven temperature. . The remaining hot water in the bathtub (B) can be drained from the water heater side, and at the time of draining, the remaining hot water does not reach the heat exchanger side. . In the first invention, the following specific effects are further obtained. Since the suction side at the time of circulation heating is a plurality of suction ports (21) (21) on the lower surface of the lower chamber (26b) of the terminal device (2), the high-temperature hot water supplies the suction ports (21) (21). The problem of short circuit suction can be prevented, and the temperature inside the bathtub can be raised efficiently.

[0015]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. [Embodiment 1] In Embodiment 1 shown in Figs. 1 to 7, a water heater (1) is connected to a bathtub (B).
The present invention is carried out after the bath can be heated and the inside of the bath (B) can be circulated and heated.

Therefore, as shown in FIG. 1, the water heater (1) and the bathtub
A circulation heating circuit is formed between the circulation heating circuit and the relay (3) disposed on the side wall of (B) .In this embodiment, from the water heater (1) to the bathtub (B) in the circulation heating circuit, A part of the supply pipe facing to the water also functions as a hot water pipe (12), and the hot water supply from the bathtub (B)
The suction pipe (11) directed to (1) is configured to also function as a drain pipe.

For this reason, in the water heater ( ₁ ) in which the heat exchanger for hot water supply (E ₁ ) and the heat exchanger for bath (E ₂ ) are built, the outlet side of the heat exchanger for hot water supply (E ₁ ) is provided. The check valve (14) on the outlet side of the bath heat exchanger (E ₂ ) is located in the middle of the hot water pipe (12) branched from the hot water supply circuit (W) and connected to the relay device (3). The connecting pipe (L) provided is joined and joined, and a filling valve (15) is inserted into the filling pipe (12) on the upstream side of the junction.
Also, a pump is installed in the suction pipe (11) in the water heater (1).
(P) is inserted, and a drain pipe (19) provided with a drain valve (16) is branched and connected to the discharge side, and a downstream end thereof is connected to a water heater.
It faces the drain (M) of the installation part of (1). An on-off valve (K) is inserted between the discharge side of the pump (P) and the bath heat exchanger (E ₂ ). On the other hand, the relay device (3) and the terminal device (2) arranged at the bottom of the bathtub (B) are an extension pipe (4).
In this embodiment, as shown in FIG. 3, the extension pipe (4) is connected to a supply extension pipe (42) connected to the filling pipe (12) and a suction pipe ( It is constituted by a suction extension pipe (41) connected to and connected to 11).

Therefore, the terminal device (2) → extension tube for suction (41) →
A circulation heating circuit is configured by the path of suction pipe (11) → heat exchanger for bath (E ₂ ) → connecting pipe (L) → hot water pipe (12) → supply extension pipe (42), and pump (P) The hot water in the bathtub (B) is forcibly circulated. The circulating heating circuit corresponds to the temperature increasing circuit described in the above-mentioned means. The relay (3)
As shown in FIG. 2, it is screwed and fixed to the side wall of the bathtub (B), and comprises a dish-shaped base (31) and a lid (32) covered therewith.
The fixed cylinder (33) protruding from the base (31) is penetrated through the side wall (G) of the bathtub (B), and the flange portion (34) of the fixed cylinder (33) and the bathtub (B) are formed. Airtight means (35) is interposed between the side wall and the side wall, and screwed with a nut (N) screwed to the end of the fixed cylinder (33). Thus, the base (31) is attached to the side wall (G) of the bathtub (B).

As shown in FIG. 4, a pair of connection bases (13) and (17) bent in an L-shape are attached to the bottom wall of the base (31), respectively. A water filling pipe (12) is connected to an outer end of the pipe, and a suction pipe (11) is connected to an outer end of the connection base (17) by brazing or the like. The ends of these connection bases inside the bathtub are connected to the relay (3).
As shown in FIG. 3, the hose end (1) of the connection base (13) is protruded downward from the lower end of the body.
3a) is a supply extension tube composed of an elastic tube such as a rubber tube
A similar suction extension pipe (41) is externally connected to the hose end (17a) of the connection mouthpiece (17).

The terminal device (2) is, as shown in FIG.
A plug (2) inserted into the drain (H) on the bottom wall (D) of (B)
2) with the upper chamber (26a) and the lower chamber inside
(26b), a seat (23) slightly larger than the drain port (H) is formed at the center of the lower surface of the hollow disk-shaped terminal (2), and the plug is inserted from the center of the seat (23). The part (22) protrudes. A plurality of ribs (24) (24) protrude from the peripheral edge of the lower surface of the terminal device (2) so that the height of the ribs matches the thickness of the seat (23). Therefore, the terminal device (2) is supported in a stable state with respect to the bottom wall (D) in a state where the stopper (22) is fitted into the drain port (H).

A plurality of suction ports are provided in an outer peripheral area of the seat (23).
(21) and (21) are formed, and these suction ports communicate with the lower chamber (26b) inside the terminal device (2), and the discharge port (25) is provided on the upper surface of the terminal device (2).
(25) are open and communicate with the upper chamber (26a). As shown in FIG. 6, the upper chamber (2)
6a) and a hose end (27b) communicating with the lower chamber (26b) project in parallel, and the hose ends (27b) communicate with the lower chamber (26b). )
And the suction extension pipe (41) are externally connected.

Therefore, in the above embodiment, the filling pipe
(12) Side is the above route and multiple outlets (25) (25) of terminal device (2)
To the bathtub, and the suction pipe (11)
It communicates with the inside of the bathtub (B) from the inlets (21) and (21) of (2). In this embodiment, when the filling operation is performed, the filling valve (15) is opened, the hot water supply heat exchanger (E ₁ ) is in the operating state, and the filling pipe (1) is operated.
2) → Connection base (13) of relay device (3) → Extension tube for supply (42) → Upper chamber (26a) of terminal device (2) → Hot water in bathtub (B) via route of discharge port (25) It is stretched. At this time, when the water level in the bathtub (B) reaches a predetermined level by a known means (not shown), the hot water filling valve (15) is closed and the operation of the hot water supply heat exchanger (E ₁ ) is started. Stopped automatically.

When circulating and heating the inside of the bathtub (B), the pump (P) and the bath heat exchanger (E ₂ ) are brought into operation by a predetermined operation. At this time, the on-off valve (K) is in the open state. As a result, hot water near the bottom wall (D) of the bathtub (B) is sucked from the suction ports (21) (21), and the lower chamber (26b) → hose end
(27b) → Extension tube for suction (41) → Connection base (17) → Suction pipe
(11) → Heat exchanger for bath (E ₂ ) → Connecting pipe (L) → Filling pipe (12)
→ Connection base (13) → Supply extension pipe (42) → Upper chamber (26a) outlet
(25) It is circulated and heated in the route of (25) → bathtub (B). And
The circulating heating is stopped by the stopping operation.

Next, in order to discharge the remaining hot water in the bathtub (B) after bathing, a drain operation is performed by a drain operation switch (S). As a result, the pump (P) was operated with the on-off valve (K) closed and the drain valve (16) opened, and suction was performed from the suction ports (21) (21) of the terminal device (2). Hot water is discharged to the drain (M) through the route of the suction extension pipe (41) → the suction pipe (11) → the drain pipe (19).

In this embodiment, when the drainage is completed by the drainage operation, the operation of the pump (P) is automatically stopped and the drainage valve (16) is returned to the closed state.
For this purpose, a control circuit shown in FIG. 7 is provided. When the drain operation switch (S) is turned on, this control circuit turns on the output contact (T ₁ ) and self-holds the timer (T)
And the relay conducted by the water flow switch (18)
(R) circuit, a pump (P) circuit that is turned on by an output contact (R ₁ ) of the circuit relay (R) or an output contact (T ₂ ) of the timer (T), and a circuit of the relay (R). comprising a circuit output contact (R ₂₎ to the open valve state by drain valve (16). Here, after the timer (T) starts operating, the output contacts (T ₁ ) (T
₂ ) is turned on for a certain period of time. In addition, relay
(R) and the drain valve (16) are connected in parallel with a delay capacitor (C) for delaying the operation stop time and the operation start time of the drain valve (16) for a predetermined time.

When this control circuit is employed, a drain switch
By turning on (S), the output contact of the timer (T) held by the output contact (T ₁ ) for a certain period of time
The pump (P) operates by (T ₂ ), and the drainage operation proceeds. Then, the relay (R) is activated by the operation of the water flow switch (18).
The pump (P) is kept in operation by the conduction of the output contact (R ₁ ), and the delay of the delay capacitor (C) by the conduction of the other output contact (R ₂ ). After a lapse of time, the drain valve (16) opens. When drainage is completed, no water flows in the suction pipe (11), so the water flow switch (18) is turned off, and after the delay time of the delay condenser (C) elapses, the relay (R) Is turned off and the pump (P) stops. Then, after the elapse of the delay time of the other delay capacitor (C), the drain valve (16) returns to the closed state. Therefore, when the drainage is completed, the drainage operation automatically stops.

If the remaining hot water in the bathtub cannot be completely drained by the draining operation, that is, the bottom (D) of the bathtub
If a small amount of residual water is generated, once the drainage is completed as described above, a certain amount of hot water or
It is also possible to replenish the bathtub (B) via 2) and then drain it again so that the remaining water at the bottom of the bathtub becomes clean hot water or water.

[Embodiment 2] In Embodiment 1 described above, the circuit for raising the temperature is used as a bathtub of the circulation heating circuit.
(B) (Piping pipe (L) and hot water pipe (12)) and the pipe returning from the bathtub (B) to the water heater (1) (Suction pipe (1)
Although it is a combination with 1)), when a high-temperature hot water supply type is used, the circuit for raising the temperature from the hot water supply unit (1) is provided with only the filling pipe (12). FIG. 8 to FIG.
A description will be given based on FIG.

In this embodiment, only the hot water supply heat exchanger (E ₁ ) is accommodated in the water heater (1). A hot water pipe (12) is connected from the hot water supply heat exchanger (E ₁ ) to the relay (3). The relay (3) is provided with connection bases (13) and (17) bent in an L-shape as in FIG. 2, and a supply extension pipe (42) is connected to a hose end (13a) inside the bathtub. The base (17)
Is connected to the extension pipe (41) for suction. This suction extension tube (4
1) is connected from the suction pipe (11) to the drain pipe (19) in the water heater through the relay (3). As shown in FIG. 9, the terminal device (2) employed in this embodiment has a single hollow chamber (26) as a whole, and a pair of hose ends (27) communicating with the hollow chamber (26). From which the supply extension pipe (42) is connected. A number of ribs (24) and (24) protrude from the lower surface in the vicinity of the peripheral edge of the terminal device (2), and a number of openings (28) and (28) penetrate through the lower surface constituting wall of the hollow chamber (26) within that range. Is formed.

The drain pipe (19) in the water heater (1) connected to the suction pipe (11) provided separately from the hot water pipe (12).
At the same time, a drain pump (P) and a drain valve (16) are inserted, and a water flow switch (18) is inserted. The downstream end of the drain pipe (19) faces the drain groove (M). In the bath apparatus of the second embodiment, the hot water supply heat exchanger (E ₁ ) is set to a temperature suitable for bathing, and the hot water filling valve (15) is opened. And the hot water pipe (12) → the connection base (13) of the relay (3) → the supply extension pipe (42) → the opening (28) (2) of the terminal (2)
Hot water can be filled in the bathtub (B) by the hot water supply route consisting of 8).

To increase the temperature of the hot water in the bathtub, the temperature of the hot water from the hot water supply heat exchanger (E ₁ ) is raised to a high temperature (for example, 80 ° C.).
(About 90 ° C) and supply it into the bathtub (B) through the above route. This will slightly increase the amount of hot water in the bathtub,
The temperature of the hot water in the bathtub is raised in accordance with the amount of the high-temperature hot water charged. To drain the hot water in the bathtub (B) after bathing, the drain valve (16) is opened in the same manner as in the first embodiment while the hot water filling valve (15) is kept closed. Put the pump (P) in operation. As a result, the remaining hot water in the bathtub (B) sucked from the openings (28) (28) is sucked by the pump (P) through the suction extension pipe (41) and the suction circuit (11), and drained. Tube (1
It is discharged to drain (M) through 9).

Incidentally, also in the case of this embodiment, the first embodiment is used.
By using the control circuit of FIG. 7 adopted in the above case as it is, the drainage operation proceeds by operating the drainage operation switch (S), and when the drainage is completed, the pump is automatically turned on.
The operation of (P) is stopped, and the drain valve (16) is returned to the closed state.

In the terminal device (2) of this embodiment, FIG.
As shown in FIG. 11, a pair of hose ends (27) and (27) project sideways from one hollow chamber (26), and the lower surface thereof has the terminal device of the first embodiment. Similarly to (2), a plug (22) may be attached and fixed to the drain port (H) of the bathtub (B). The plug protrudes from the center of the seat (23), and a large number of openings (28) and (28) are formed in the lower wall of the hollow chamber (26) in the outer peripheral area of the seat (23). I have.

On the other hand, the end of the suction pipe (11) in the water heater (1) faces the drain groove (M), and on the upstream side thereof, a drain valve (16), a pump (P), and a water flow switch ( 18) is inserted.
In this case, the temperature of the hot water in the bathtub (B) can be increased by supplying hot water which can be filled with water and has a high temperature.
When draining the remaining hot water, the hot water can be drained from the water heater (1) through a suction pipe (11) provided separately from the hot water pipe (12) and a circuit connected thereto.

[Others] The following changes can be made to each part of the above embodiment. Change to provide a suction pipe (11) separately from the circulation heating circuit. In this case, the relay (3)
Three pipes are required to connect to the water heater (1) side. . In order to fix the terminal device (2) at an arbitrary position on the bottom wall (D), a suction cup (29) may be provided on the lower surface of the terminal device (2) as shown in FIG. In this case, the plug portion (22) becomes unnecessary, and the drain port (H) is closed with a separate bath plug in order to make the above apparatus correspond to the bathtub (B) having the drain port (H). . Change the extension pipe (4) to an inflexible type of piping member.

The relay device (3) and the terminal device (2) are not necessarily made of metal, but may be made of synthetic resin. . As shown by the imaginary lines in FIG. 5, the seat (23) and the ribs (24) (2
An annular open-cell type porous member (V) such as a sponge having a thickness substantially equal to the height of the rib (24) may be provided between the porous member (V) and the rib (4). In this case, the remaining hot water stored on the bottom surface of the bathtub can be reliably sucked from the inlets (21) and (21) by the capillary action of the porous member (V). . The drain valve (16) of the embodiment of FIG. 1 may be a three-way valve of a switching type, so that only the drain circuit side is communicated when draining, and only the circulation circuit side is communicated in the circulating heating state.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view of an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the relay (3).

[Fig. 3] Front view of the relay (3) from the inside of the bathtub (B)

FIG. 4 is a cross-sectional plan view of the relay device (3).

FIG. 5 is a sectional view of the terminal device (2).

FIG. 6 is a plan view of the terminal device (2).

FIG. 7 is an explanatory diagram of a drainage control circuit.

FIG. 8 is an explanatory view of a second embodiment.

FIG. 9 is a sectional view of a terminal device (2) used for this.

FIG. 10 is a cross-sectional view of another example of a terminal device (2) used for this.

FIG. 11 is a bottom view of another example of the terminal device (2).

FIG. 12 is an explanatory view of another example of the terminal device (2).

[Explanation of symbols]

 (B) ... bathtub (1) ... water heater (3) ... side wall (P) ... pump (11) ... suction pipe (20) ... extension pipe (2)・ ・ ・ Terminal device (12) ・ ・ ・ Boiler tube (22) ・ ・ ・ Plug

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24H 1/00 302 G

Claims (4)

(57) [Claims] 1. A water heater and a bathtub are connected by a heating circuit having a hot water pipe (12) and a suction pipe (11), and while the hot water in the bathtub is circulated, the bathtub is connected from the water heater side. In a bath apparatus capable of raising the temperature of hot water in the bath, the hot water filling pipe (12) and suction pipe (11) are provided on the side wall of the bathtub (B).
And a relay device (3) having connection bases (13) and (17) connected separately to each other, and a plurality of discharge ports (25) (25) on the upper surface at the bottom of the bathtub (B).
A hollow terminal device (2) partitioned into an upper chamber (26a) having a lower chamber and a lower chamber (26b) having a plurality of suction ports (21) and (21) on the lower surface is placed, and The connection base (13) and the upper chamber (26a) are connected by a supply extension pipe (42), and the connection base is connected.
(17) and the lower chamber (26b) are connected by a suction extension pipe (41), and a pump (P) is connected to the suction pipe (11) in the water heater (1).
A drain pipe (19) provided with a drain valve (16) is branched and connected to the discharge side thereof, and a drain pipe (19) for the bath is provided on the downstream side of the branch part of the drain pipe (19) in the pump discharge direction. A bath unit with an on-off valve (K) that is closed when draining is inserted upstream of the heat exchanger. 2. A high-temperature hot-water supply type water heater and a bathtub are connected by a single heating circuit having a hot-water filling pipe (12),
In a bath apparatus of a type in which the temperature of hot water in a bathtub can be raised by hot water from a water heater side, a relay (3) having a pair of connection bases (13) (17) on a side wall of the bathtub (B). ), A terminal (2) communicating with the bathtub (B) is disposed at the bottom of the bathtub (B), and the hot water pipe (12) is connected to the connection base (13) and the connection base (13). The extension pipe (42) is connected to the terminal (2), and the hot water supply pipe (1) and the relay (3) are connected between the hot water pipe (1)
A suction pipe (11) is provided separately from 2), and a drainage pump is provided in the water heater (1) in the suction pipe (11).
(P), and a drain pipe (19) inserted with a drain valve (16) that is opened at the time of drainage is connected to the discharge side of the drain pump (P). ) Is the connection base (17) of the relay (3).
And a bath apparatus connected to the terminal device (2) via a suction extension pipe (41) connected thereto. 3. The terminal device (2) is a terminal device which is used by being placed on the bottom of a bathtub, wherein the interior of the terminal device (2) is divided into an upper chamber (26a) and a lower chamber (26b). A first hose end (27a) that is in communication with the upper chamber and that can connect a supply extension pipe (42); and a plurality of discharge ports (25) (25) provided on the upper surface of the upper chamber. 25), a second hose end (27b) communicated with the lower chamber and capable of connecting a suction extension pipe (41), and a plurality of suction ports (21) provided on the lower surface of the lower chamber. 3. The bath apparatus according to claim 2, wherein the terminal apparatus is provided with (21). 4. The bath apparatus according to claim 1, further comprising a plug (22) fitted into a drain port in a bathtub (B) on a lower surface of said terminal device (2).