JPH06272881A - Hot-water circulating unit for bathtub - Google Patents

Abstract

PURPOSE:To permit bathroom heating by branching hot-water from a circulating port for additional heating system and circulating it through the inside of a hot-water mat. CONSTITUTION:A three-way valve 45 is attached to a hot-water sending pipe 43 in the main body 40 of a unit and the three-way valve 45 is switched to the side of a hot-water mat whereby hot-water in a bathtub 27 is circulated through the inside of the hot-water mat by the effect of a circulation pump in a full-automatic bath hot-water supplying machine and the heating of a bathroom is permitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a wall of a bathtub in order to send hot water sent from a fully automatic bath water heater into the bathtub and send hot water in the bathtub to the fully automatic bath water heater side. The present invention relates to a hot water circulation unit (circulation port) for a bathtub.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional hot water circulation port is provided with connection ports 2 and 3 for connecting a fully automatic bath water heater (not shown) at the rear of a main body 1 and a hot water outgoing line 4. The connection port 2 is connected, the hot water return line 5 and the connection port 3 are connected, and the hot water heated by the fully automatic bath water heater passes from the hot water outgoing line 4 through the connection port 2 to the bathtub discharge port 6 to the bathtub 8 The hot water in the bathtub 8 flows back into the fully automatic bath water heater from the hot water return port 7 through the connection port 3 and the hot water return line 5.

[0003]

Therefore, for example, a bathroom is heated by laying a hot water mat in the bathroom and circulating the hot water in the bathtub 8 in the hot water mat using a fully automatic bath water heater. In this case, a pipe connecting the hot water mat and the bathtub and a circulation pump are required, which may increase the construction cost and may not be compatible with the existing facility.

An object of the present invention is to take hot water from a recirculation port for reheating attached to a bathtub toward a hot water mat for hot water heating, and return the warm water to the circulation port. Is to propose.

[0005]

The structure of the hot water circulation unit according to the present invention is as follows.

[0006] A hot water outflow pipe for feeding hot water sent from a fully automatic bath water heater into a bathtub and a hot water in the bathtub are fully automatic bath A hot water return pipe for sending out to the water heater side is installed, a three-way valve is attached to the hot water outflow pipe, a hot water mat outflow port is formed on the branch side of this three-way valve, and at the downstream side of the three-way valve in the hot water outflow pipe. A hot water circulation unit for bathtubs that forms a hot water mat return port.

[0007]

When the hot water in the bathtub is reheated by using the fully automatic bath water heater, the three-way valve is switched to the bathtub side. As a result, the hot water that entered the unit from the hot water outgoing line through the connection port is sent to the three-way valve → hot water outgoing pipe → hot water discharge port → bath, and at the same time the hot water in the bathtub is bath → hot water return port → hot water. Return pipe → Connection port → Hot water return line →
Fully automatic bath water heater → hot water going line → connection port → three-way valve →
It circulates from the hot water outflow pipe to the hot water discharge port to the bathtub.

Next, when the heating operation is started by using the hot water mat, the hot water mat going line is connected to the hot water mat outgoing port and the hot water mat return line is connected to the hot water mat returning port. , The three-way valve is switched to the hot water mat outlet side, and at the same time, the circulation pump in the fully automatic bath water heater starts to drive, and the hot water in the bathtub goes through the fully automatic bath water heater once. It enters the three-way valve from the line, flows to the hot water mat side here, makes a round of the hot water mat and releases the heat to heat the bathroom, and the return hot water is a unit from the hot water mat return line via the hot water mat return port. It returns to the inside of the hot water outlet pipe, and then returns to the inside of the bathtub via the hot water discharge port. It is also possible to ignite the gas burner in the fully automatic bath water heater to circulate the heated hot water in the hot water mat when the hot water temperature in the bathtub is low during the heating of the bathroom.

[0009]

1 and 2 show an embodiment of a hot water circulation unit according to the present invention. The hot water circulation unit 40 has a hot water outflow pipe 43 for sending hot water sent from the fully automatic bath water heater to the unit main body 41 side formed by fixing means 42 for the bath 27 to the inside of the bath 27. A hot water return pipe 44 for sending hot water in the bathtub 27 to the fully automatic bath water heater side is incorporated, and the three-way valve 4 is attached to the hot water outgoing pipe 43.
5, a hot water mat outflow port 47 is formed at a branch port 46 of the three-way valve 45, and a hot water mat return port 48 is formed downstream of the three-way valve 45 in the hot water outflow pipe 43. 43 'is a hot water discharge port, 44' is a hot water return port, 45 'is a three-way valve drive motor, 49 is a temperature detection sensor, 50 is a hot water outgoing line connection port, and 51 is a hot water return line connection port.

FIG. 3 shows a hot water circulation unit 40 according to the present invention.
3 is an explanatory view of a bathroom heating system using a hot water mat, and in FIG. 3, 20 is a fully automatic bath water heater, 21 is a heat exchanger, 22 is a gas burner, 23 is a gas control valve, and 24 is a circulation pump. , 25 are hot water return lines, and the return line 25 is the connection port 5 of the circulation unit 40.
Connected to 1. 26 is a hot water going line, and this hot water going line 26 is a connection port 50 of the circulation unit 40.
It is connected to the. 27 is a bathtub, 28 is a return temperature detection sensor, 29 is a controller, 30 is a remote controller, 31
Is a room temperature detection sensor, 32 is a warm water mat, 33 is a warm water mat going line, and this warm water mat going line 33
Is connected to a hot water mat outlet 47 connected to a branch port 46 of the three-way valve 45. 34 is a hot water mat return line, and this hot water mat return line 34 is a hot water outflow pipe 43.
Is connected to the warm water mat return port 48.

Next, an operation example of the above embodiment will be described.

When the hot water in the bathtub 27 is so-called reheated by using the fully automatic bath water heater 20, the three-way valve 45 is set to the bathtub 2.
Switch to 7 side. As a result, the hot water going line 26
The hot water entering the unit 40 through the connection port 50 from the three-way valve 45 → the hot water outflow pipe 43 → the hot water discharge port 43 ′ → the bath 27 at the same time, the hot water in the bath 27 is the bath 27 → the hot water return. Port 44 '→ hot water return pipe 44 → connection port 5
1 → Hot water return line 25 → Fully automatic bath water heater 20 (circulation pump 24) → Hot water outgoing line 26 → Connection port 50 → Three-way valve 45 → Hot water outgoing pipe 43 → Hot water discharge port 43 ′ → Bath 27
And circulate.

Next, in the hot water mat 32, the hot water mat going line 33 is connected to the hot water going port 47 and the hot water mat return line 34 is connected to the returning port 48, so that the three-way valve 45 is turned on when the heating operation switch is turned on. Is switched to the branch port 46 side (position of the three-way valve in FIGS. 1 and 2), and at the same time, the circulation pump 24 in the fully automatic bath water heater 20 starts driving,
The hot water in the bathtub 27 once enters the three-way valve 45 from the hot water going line 26 via the fully automatic bath water heater 20, flows to the hot water mat 32 side here, and circulates the hot water mat 32 to release the heat to the bathroom. The inside of the hot water is heated, and the return hot water is returned from the warm water mat return line 34 via the return port 48
Return to the inside of the bathtub 2 via the hot water outlet 43 '.
Return to 7 When the temperature in the bathtub 27 is low (detected by the hot water temperature detection sensor 28) during the heating of the bathroom, the gas burner 22 in the fully automatic bath water heater 20 is ignited and the hot water heated by the heat exchanger 21 is heated. It is also possible to circulate in the warm water mat 32.

[0014]

As described above, the present invention is configured so that the bathroom heating can be performed by circulating the hot water in the bath on the hot water mat side by utilizing the function of the fully automatic bath water heater. When heating the bathroom using the hot water mat, no special plumbing work is required. Further, when laying a hot water mat in an existing facility, it is only necessary to replace the circulation port of the bathtub with the hot water circulation unit according to the present invention.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a hot water circulation unit according to the present invention.

FIG. 2 is a sectional view taken along the line AA ′.

FIG. 3 is an explanatory diagram of an example in which the hot water circulation unit according to the present invention is applied to a reheating system that uses a fully automatic bath water heater.

FIG. 4 is an explanatory view of a conventional circulation port.

[Explanation of symbols]

 40 Unit Main Body 43 Hot Water Outgoing Pipe 44 Hot Water Returning Pipe 45 Three-way Valve 47 Hot Water Mat Outgoing Port 48 Hot Water Mat Returning Port 49 Temperature Detection Sensor

Claims (1)

[Claims] 1. A hot water outflow pipe for feeding hot water sent from a fully automatic bath water heater into a bathtub and a hot water in the bathtub to a unit body formed by mounting means for attaching to the wall of the bathtub on the outside. A hot water return pipe for sending out to the automatic bath water heater side is installed, a three-way valve is attached to the hot water outflow pipe, a hot water mat outflow port is formed on the branch side of this three-way valve, and the hot water outflow pipe is downstream of the three-way valve. A hot water circulation unit for bathtubs that has a hot water mat return port on the side.