JPH0733086Y2 - Hot water supply device for bubble bath - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a hot-water supply device for a bubble bath for supplying hot water to the bathtub and ejecting bubbles. 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. There is also used a hot water supply device for a bubble bath, which has a bubble jet nozzle at 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.

In addition, when the reheating device is provided, hot water heated by the reheating device may be supplied when hot water is supplied, and excessively hot water may be stored in the bathtub.

[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. The hot water supply device is provided with a hot water supply device for supplying hot water to the bath tub, and the hot water supply device is an improvement of the hot water supply device for the bubble bath, in which the water inlet is connected to the water supply source and the hot water is discharged by the water supply pressure.

In the hot water supply device for a bathtub according to the present invention, the outlet of the water heater is connected to the hot water inlet of the hot water mixing valve via the hot water pipe, and the hot water supply pipe is connected to the water inlet of the hot water mixing valve. The mixed water outlet of the hot and cold water mixing valve is directly connected to each of the bath tub 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 mixed water outlet of the hot and cold water mixing valve, two branch hot water supply pipes are branched from the common hot water supply pipe, and one of these branch 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 location close to is connected to the reheating device.

Further, branch hot water supply pipes are connected by a bypass pipe on the bathtub side of this connection portion, and a flow path switching means for opening / closing the bypass pipe is provided, and a branch hot water supply between the connection portion and the bathtub is provided. A circulation pump is provided in the pipe, and a bubble ejection nozzle is provided at the circulation return port of the bath.

[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 mixing valve and the bath.
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 the connection portion and the check valve are close to each other, the length of the portion where water is difficult to escape is short, and the residual water in the pipe is extremely small.

In the present invention, hot water is supplied to each branch hot water supply pipe from a common hot water supply pipe at the same pressure. For this reason, the hot water does not go around to the reheating device during hot water supply. As a result, excessively high temperature hot water heated by the reboiler is not discharged during hot water supply.

In the present invention, when the circulation pump is operated with the bypass pipe open, the hot water in the bathtub is circulated through the bypass pipe. Then, a bubble flow containing air can be ejected from the bubble nozzle.

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 to the water supply port 14, the water supply pipe 16, and the water supply pipe 16 respectively.
Safety valve integrated decompression check valve 17 and branch port provided in the middle of
18. It is introduced into the heating tank 22 in the water heater 12 via the water supply pipe 20, and is heated by the heating means 24 such as a burner and a fan to become hot water. Part of this hot water can be supplied from the outlet 28 to demand places such as bathroom showers and kitchens. The water supply pipe 16 is connected to the water inlet of the hot and cold water mixing valve 34, and the hot water outlet 30 of the heating tank 22 is connected to the hot water inlet of the hot and cold water mixing valve 34 via the hot water outlet pipe 32. Heating tank 22
The hot water is sent to the mixing valve 34 through the hot water outlet 30 and the hot water outlet pipe 32, and has an appropriate temperature (for example, 40
After being mixed with the hot water mixing valve 34, the hot water mixing valve 34 sends out the hot water supply pipe (common hot water supply pipe) 44 from which a solenoid valve 38, a check valve 42, and a flow rate sensor 40 are provided.

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, the pipe 70, the three-way valve 71, the pipe 70a, the circulation pump 72 and the pipe 70b. There is. 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. In the present embodiment, the pump 72 is provided near the three-way joint 74.

In the horizontal pipe 76, the two-way joint 78 side is connected to the bathtub 10 via the pipe 82.
Is connected to the circulation return port 84 of the. The two-way joint 80 is closed by a blind plug.

A nozzle 85 for ejecting bubbles is installed at the circulation return port.
An air tube 85a is connected to the nozzle 85, and an air valve 85b is provided on the air tube 85a.

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.

The middle of the pipe 53 is connected to the three-way valve 71 via a bypass pipe 91.

A controller 93 is provided in the bathroom. The controller 93 is provided with a hot water filling switch 96, a reheating switch 98, and a bubble jetting switch (JET switch) 94, the operation signals of which are control devices in the water heater casing 57.
Entered in 100. 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, the three-way valve 71, the pump 72 and the air valve 85b.

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 bubble bath thus configured, when the hot water filling switch 96 is pressed, the solenoid valve 38 is opened.
In addition, the three-way valve selects a flow path so that the pipes 70 and 70a communicate with each other. As a result, the hot water from the water heater 12 is mixed with the mixing valve 34.
After making hot water at an appropriate temperature, the common hot water supply pipe 44 to two hot water supply pipes
46, 48 (further piping 46a, 53, 56, 62 and piping 48a, 7
0, 70a, 70b, 76, 82. These pipes also constitute a branch hot water supply pipe. ), It can be supplied to the bathtub 10 to be filled with water. When the pump 72 is stopped, the water (hot water) flows through the pump 72 as it is.

Since the hot water is supplied from the two pipes in this way, the hot water supply speed is high. Therefore, hot water filling and hot water can be rapidly performed. The branch hot water supply pipes 46 and 48 are supplied with hot water from the common hot water supply pipe 44 at the same pressure. Therefore, equal hot water supply pressure is applied to the pipes 86 and 92, and hot water does not flow into the tube 88. Therefore, at the time of filling the hot water, the hot water supplied is not heated by the reheating device at all, and the hot water having the temperature set by the mixing valve 34 is stored in the bathtub 10.

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.

In the device of this embodiment, when the reheating switch 98 is pressed, the pump
When 72 is operated, the three-way valve 71 selects a flow path so as to connect the pipes 70 and 70a. Thereby, the hot water in the bathtub 10 is the circulation outlet 64, the pipes 62, 56, 53, 86, the tube 88,
It is circulated through the pipes 92, 70, 70a, the pump 72, the pipes 70b, 76, 82, and the circulation return port 84, and is heated in the tube 60 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.

When the JET switch 94 is pressed, the bypass pipe 91
After the flow path of the three-way valve 71 is selected so as to communicate with 0a, the pump 70 is operated and the air valve 85b is opened.

As a result, the hot water in the bathtub will be pipes 62, 56, 53, 91, 70a, 7
A large amount flows in the order of 0b, 76, 82. And the air tube
A large amount of air is mixed from 85a, and is ejected from the nozzle 85 together with bubbles into the bath.

In the apparatus of this embodiment, the water heater 12 is used by utilizing the tap water supply pressure.
Since the hot water is directly supplied to the bathtub 10, there is no need for a hot water supply pump or receiver tank as in the conventional case.

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,
These pipes 46a and 48a are made extremely short by being close to 66 (normally about 10 to 20 mm). Therefore, these pipes
The water in 46a and 48a easily spreads to the side of 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.

In this embodiment, since the pump 72 is provided close to the three-way joint 74, the pipeline length to the bathtub 10 on the downstream side of the pump 72 is short. Therefore, the installation level of the bathtub 10 is two-way joints 58, 78.
Even if it is above, when the pump 72 is operated to drain the water in the pipe, all the water in the pipe on the upstream side of the pump 72 is discharged, and the water on the downstream side of the pump 72 is very small. Water will only remain in the short compartments. Therefore, it is sufficient to provide the antifreezing heater only in a limited section downstream of the pump 72 (on the bathtub 10 side).

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

In this embodiment, when the pump 72 is operated to drain water from the pipe, the circulation return port may be covered with a cap so that the direction of water ejected from the nozzle 85 is directed downward. FIG. 2 is a sectional view showing an example of such a cap 200, and FIG. 3 is a view taken along the line III-III in FIG. Code 20
Reference numeral 2 denotes a nozzle mounting port, and 204 denotes an outflow port.

[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 can reliably supply hot water of an appropriate temperature to the bath. The device of the present invention makes it easy to extract water from the pipe,
Excellent antifreeze function. Also, the number of antifreeze heaters can be reduced.

In the present invention, it is possible to circulate a large amount of hot water and eject a large amount of bubbles by opening the bypass pipe during the bubble ejection operation.

[Brief description of drawings]

FIG. 1 is a system diagram showing an apparatus according to an embodiment of the present invention. Second
The figure is a cross-sectional view of the cap 200, and FIG. 3 is a front view of the same. 10 ... Bathtub, 12 ... Water heater, 16 ... Water pipe, 32 ... Hot water pipe, 34 ...
Mixing valve, 44 ... Common hot water supply pipe, 46, 46a, 48, 48a, 53, 56,
62, 70, 76, 82 ... Piping for hot water supply, 42, 50, 66 ... Check valve,
70 ... Pump, 71 ... Bypass pipe, 84 ... Circulation return port, 64 ... Circulation outlet, 94 ... JETC switch, 96 ... Water filling 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 a hot water supply device for a bathtub, in which a water inlet is connected to a water supply source to discharge hot water by water supply pressure, a water supply pipe is connected to a water inlet, and the hot water inlet is connected to the hot water supply pipe through the hot water supply pipe. A hot and cold water mixing valve connected to the hot water outlet of the machine is installed, one common hot water supply pipe is connected to the mixed water outlet of the hot and cold water mixing valve, and two branch hot water supply pipes branch from the common hot water supply pipe. , One of these branch hot water supply pipes is connected to the circulation outlet and the other is connected to the circulation return port, and the common hot water supply pipe and each branch hot water supply pipe are respectively provided with check valves, which are provided in the branch hot water supply pipe. Is closer to the bath than the check valve,
Moreover, a portion close to the check valve is connected to the reheating device, the branch hot water supply pipes are connected by a bypass pipe on the bathtub side of this connection portion, and a flow path switching means for opening and closing the bypass pipe is provided. A hot water supply device for a bubble bath is provided with a circulation pump provided in a branch hot water supply pipe between the connection portion and the bath, and a bubble jet nozzle provided at a circulation return port of the bath. .