JPH073239Y2 - Hot water supply device for bathtub - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a hot water supply device for a bathtub for supplying hot water to a bathtub. More specifically, the present invention relates to a device for directly supplying water to a bathtub by using water supply pressure. More specifically, the present invention relates to a hot water supply device for bathtubs provided with anti-freezing measures.

[Prior Art] Conventionally, a water heater has been used in which tap water is heated to supply hot water to a bathtub. Further, there is also used a device in which hot water (or water) in the bathtub is extracted from the circulation outlet, heated by a reheating device, and returned to the bath via the circulation return port.

[Problems to be solved by the invention] In a conventional hot water supply device, hot water from a water heater is mixed with tap water by a hot water mixing valve to obtain mixed water of an appropriate temperature, which is once received by a receiver tank and then pumped from this tank. To supply to the bathtub, and extra parts (receiver tank, pump, etc.) were required.

Further, in general, there is a demand of a customer who wants to supply hot water to the bathtub as quickly as possible and shorten the time required for filling the hot water.

Further, in a hot water supply device for a bathtub installed in a cold region, it is required that water in the pipe is easily drained in order to prevent water from freezing in the pipe.

[Means for Solving the Problems] In order to solve the above problems, the present invention is a device for supplying hot water to a bathtub having a circulation outflow port and a circulation return port connected to an additional heating device. A water heater for supplying hot water to the bathtub, the water heater having an inlet for water connected to a water source,
The hot water supply device for hot tubs is provided by tapping the hot water supply pressure, and the hot water supply device of the hot water supply device is an improved hot water supply device for bath tubs which is directly connected to a bath tub via a hot water supply pipe.

In the hot water supply device for a bathtub according to the present invention, the hot water outlet of the hot water supply device is directly connected to each of the bathtub circulation outflow port and the circulation return port by a hot water supply pipe so that hot water can be directly supplied to the bathtub by the water supply pressure.

That is, one common hot water supply pipe is connected to the hot water outlet of the water heater, two branched hot water supply pipes branch from the common hot water supply pipe, and one of these branched hot water supply pipes is connected to the circulation outlet. The other is connected to the circulation return port, and a check valve is provided in each of the common hot water supply pipe and each branch hot water supply pipe, and the branch hot water supply pipe is closer to the bathtub than the check valve and is also a check valve. The nearest point of is connected to the reheating device.

[Operation] In the hot water supply device for a bathtub of the present invention, after the tap water supplied from the water supply pipe is heated by the water heater, the tap water is directly supplied to the bathtub by the water supply pressure without passing through the receiver tank or the pump. To be done. Therefore, the number of parts is small.

Further, since the hot water from the water heater is supplied to the bathtub from the circulation outflow port and the circulation return port, the hot water supply speed at the time of supplying water to the bathtub at the time of filling water is high.

In the present invention, two check valves are installed in series in each of the two hot water supply lines that connect the hot water supply device and the bathtub.
Backflow is reliably prevented. In addition, since the downstream side portion close to these check valves is connected to the reheating device (this connecting portion may be referred to as "connecting portion"), when draining water from inside the pipe, residual water The amount of will be very small. That is, when draining water from the inside of the pipe, it is difficult for water to drain between the connection portion and the check valve. In the present invention, since this connection portion is provided in the position immediately near the check valve,
The length of the part where water does not easily escape is short, and the residual water in the pipe is extremely small.

Embodiments Embodiments will be described below with reference to the drawings. FIG. 1 is a system diagram showing an apparatus according to an embodiment of the present invention.

In FIG. 1, reference numeral 10 is a bathtub, and reference numeral 12 is a water heater. Water is supplied from a water supply port 14, a water supply pipe 16, a safety valve integrated decompression check valve 17 provided in the middle of the water supply pipe, a branch port 18, a water supply pipe 20.
It is introduced into the heating tank 22 in the water heater 12 via the, and is heated to high temperature hot water by the heating means 24 including a burner and a fan. Part of this hot water can be supplied from the outlet 28 to demand places such as bathroom showers and kitchens.
Further, the hot water in the heating tank 22 is sent to the mixing valve 34 through the hot water outlet 30 and the hot water outlet pipe 32, and after being mixed with the water sent through the water supply pipe 36 at an appropriate temperature (for example, 40 ° C.), Hot water supply pipe with solenoid valve 38, check valve 42, and flow rate sensor 40 (common hot water supply pipe)
Sent by 44.

The hot water supply pipe 44 is branched into hot water supply pipes (branch hot water supply pipes) 46 and 48 from the middle. The branch hot water supply pipe 46 is a three-way joint in the middle of the horizontal pipe 56 via the check valve 50, the pipe 46a, the three-way joint 52 and the pipe 53.
Connected to 54. Horizontal pipe 56 is the water heater casing
57 This is for taking hot water out of the casing 57.
Two-way joints 58, 60 are provided at both ends so that hot water can be taken out from either side (left side and right side in the figure) of the.
In this embodiment, the two-way joint 60 is sealed with a blind plug or the like. The two-way joint 58 side of the horizontal pipe 56 is connected to the circulation outlet 64 of the bathtub 10 via the pipe 62.

The branch hot water supply pipe 48 is connected to the three-way joint 74 in the middle of the horizontal pipe 76 via the check valve 66, the pipe 48a, the three-way joint 68, and the pipe 70. The horizontal pipe 76 is also provided with two-way joints 78 and 80 at both ends, and hot water can be discharged from either side of the casing 57. A circulation pump 72 is provided in the middle of the pipe 70. The horizontal pipe 76 is connected to the circulation return port 84 of the bathtub 10 via the pipe 82 on the side of the two-way joint 78. Two way joint
The 80 is sealed by a blind plug.

A pipe 86 is connected to the three-way joint 52, and this pipe 86 is connected to an inlet 88a of a heating tube 88 arranged in the heating tank 22. The outlet 88b of the heating tube 88 is connected to the three-way joint 68 via a pipe 92.

A controller 94 is provided in the bathroom. The controller 94 is provided with a hot water filling switch 96 and a reheating switch 98, and the operation signal thereof is input to the control device 100 in the hot water supply device casing 57. It should be noted that the detection signals of the temperature sensor 102 for detecting the bath water temperature provided in the flow rate sensor 40 and the three-way joint 54 are also input to the control device 100. The control device 100 outputs a control signal to the solenoid valve 38 and the pump 72.

The horizontal pipes 56, 76 are provided with heaters 104, 106. The heaters 104 and 106 are for preventing freezing.

In the hot water supply device for a bathtub configured as described above, when the hot water filling switch 96 is pressed, the solenoid valve 38 is opened. As a result, after the hot water from the hot water heater 12 is turned into an appropriate temperature hot water by the mixing valve 34, the common hot water supply pipe 44 to the hot water supply pipes 46, 48 of the two systems (further, the pipes 46a, 53, 56, 62 and the pipes 48a, 70). , 76, 82) to supply water to the bathtub 10 for filling. When the pump 72 is stopped, the water (hot water) flows through the pump 72 as it is.

In this embodiment, the flow sensor 40 detects the amount of hot water supplied to the bathtub 10 through the hot water supply pipe 44. In the control device 100, the total hot water supply amount is a predetermined amount (for example, the water level in the bathtub 10 is 8
When the amount reaches the minute), the electromagnetic valve 38 is closed and the hot water supply is stopped.

Also, when the additional heating switch 98 is pressed, the pump 72 is activated,
The hot water in the bathtub 10 is the circulation outlet 64, the pipes 62, 56, 53, 86, the tube 60, the pipes 92, 70, the pump 72, the pipes 76, 82, the circulation return port.
It is circulated through 84 and heated in a tube 88 on the way. Therefore, it is possible to reheat the hot water in the bathtub 10. The reheating may be automatically stopped when the temperature detected by the temperature detector 102 reaches a predetermined upper limit temperature.

As described above, in the device of the present embodiment, the hot water of the hot water supply device 12 is directly supplied to the bathtub 10 by using the water supply pressure of the tap water, and a pump for hot water supply and a receiver tank are not required as in the conventional case. Is. Further, since hot water is supplied by two hot water supply pipes, a large amount of hot water can be rapidly supplied even if the flow path length is large. Therefore, water filling and hot water can be rapidly performed.

In the above embodiment, since the check valves 42, 50, 66 are provided, the hot water on the downstream side of the check valves 50, 66 does not flow back toward the water pipe. Particularly, in this embodiment, the check valve 42 and
Since 50 is arranged in series and the check valves 42 and 66 are also arranged in series, backflow is reliably prevented.

In this embodiment, when the hot water in the bathtub 10 is discharged, the piping
62, a portion of the horizontal pipe 56 between the two-way joint 58 and the three-way joint 54, the pipe 53, the pipe 86, the tube 88, the pipe 92, the pipe 70,
The water in the pipe 82 and the portion of the horizontal pipe 76 between the three-way joint 74 and the two-way joint 78 quickly flows into the bathtub 10. (Note that the pump 72 may be operated to forcibly discharge.) Therefore, freezing of water is prevented in these pipes. The portions of the horizontal pipes 56, 76 between the three-way joints 54, 74 and the two-way joints 60, 80 are heated by the heaters 104, 106 to prevent freezing. (These heaters 104 and 106 are automatically turned on and off by a bimetal type switch, but the control device 100 may output a control signal based on the detection value of the temperature sensor.) The three-way joint 52 Piping 46a between check valve 50 and three-way joint 6
In the pipe 48a between the check valve 66 and the check valve 66, it is difficult for water to drain even when the bath 10 is drained or the pump 72 is operated. However, in this embodiment, the three-way joints 52, 68 are connected to the check valve 50,
The pipes 46a, 48a are provided very close to 66 and are extremely short (normally about 10 to 20 mm). Therefore, the water in these pipes 46a and 48a easily spreads toward the pipes 53 and 70,
Almost no water remains in a and 48a. Even if the residual water freezes in the pipes 46a and 48a, it does not reach a level where the pipes 46a and 48a are frozen and blocked. Therefore, these pipes 46
It is not necessary to provide a freeze prevention heater on a and 48a.

Although the flow rate sensor 40 detects the amount of hot water supplied to the bathtub 10 in the above embodiment, the water level in the bathtub 10 may be detected by an appropriate sensor such as a pressure switch in the present invention.

In the present invention, a bubble jet nozzle may be attached to the circulation return port 84 to form a bubble bath. In this case,
A bypass pipe that short-circuits the pipe 86 and the pipe 92 may be provided, and a large amount of hot water may be circulated during the bubble ejection operation.

In the present invention, the hot and cold water mixing valve 34 may be provided with a mixed water temperature varying mechanism.

[Advantages of the Invention] As described above, according to the hot water supply device for a bathtub of the present invention, hot water can be supplied to the bathtub by the water supply pressure, a hot water supply pump and a receiver tank are not required, and the configuration is simple. In addition, two hot water supply pipes are provided so that filling and hot water can be quickly performed.

According to the hot water supply device for a bathtub of the present invention, a plurality of check valves are installed in series to reliably prevent backflow.

INDUSTRIAL APPLICABILITY The hot water supply device for a bath according to the present invention has an excellent antifreezing function because water in the pipe can be easily extracted. Also, the number of antifreeze heaters can be reduced.

[Brief description of drawings]

FIG. 1 is a system diagram showing an apparatus according to an embodiment of the present invention. 10 …… Bathtub, 12 …… Water heater, 34 …… Mixing valve, 44 …… Common hot water supply pipe, 46, 46a, 48, 48a, 53, 56, 62, 70, 76, 82…
… Hot water supply pipes, 42, 50, 66 …… Check valve, 84 …… Circulation return port, 64 …… Circulation outlet, 94 …… Controller, 96 …… Hot water switch, 98 …… Reheating switch , 100 ... Control device.

Claims (1)

[Scope of utility model registration request] 1. A device for supplying hot water to a bathtub having a circulation outlet and a circulation return port connected to a reheating device, comprising a water heater for heating the water supply to supply hot water to the bathtub. In the hot water supply device for a bathtub, in which a water inlet is connected to a water supply source and hot water is discharged by a water supply pressure, and the hot water outlet of the water heater is directly connected to the bathtub through a hot water supply pipe, One common hot water supply pipe is connected to the hot water outlet, two branch hot water supply pipes are branched from the common hot water supply pipe, one of these branch hot water supply pipes is connected to the circulation outflow port, and the other is connected to the circulation return port. In addition, the common hot water supply pipe and each branch hot water supply pipe are respectively provided with check valves, and the branch hot water supply pipe is on the bathtub side of the check valve,
In addition, a hot water supply device for a bathtub, characterized in that a portion immediately near the check valve is connected to the reheating device.