JPH0336814Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a bath reheating device. More specifically, the present invention relates to an improvement of a bath reheating device using a water heater.

(Prior art) Conventionally, in a bath reheating device using a water heater, a heat exchanger and burner for reheating are installed in the water heater separately from those for hot water supply, and the heat exchanger and the outer wall of the bathtub are connected. There is one that is connected to the bus heater through piping (for example, Utility Model Application No. 125944/1983).

(Problem to be solved by the invention) According to the conventional bath reheating device described above, two independent piping systems are required, one for supplying hot water to the bathtub and one for reheating the bathtub water, resulting in an increase in the number of piping. It had some defects that made construction time-consuming. In addition, the hot water heater needs to be able to handle both hot water supply and reheating, which has the drawback of increasing the size of the water heater.

The present invention was developed in view of the conventional circumstances as described above, and its first purpose is to share the hot water supply system for bathtub water as a circulation path for high-temperature water that serves as a heat source for reheating. The object is to eliminate the above-mentioned conventional drawbacks. The second purpose is to prevent the hot water from being contaminated by the bath water in the event that the heat exchanger that exchanges heat between the high temperature water and the bath water is damaged.

(Means for Solving the Problems) In order to achieve each of the above objects, the bath reheating device of the present invention includes a water supply pipe connecting to a water supply source,
It has a hot water supply system in which a hot water supply pipe branched from the water supply pipe and having a water heater arranged in the middle thereof is connected to a mixing faucet,
The downstream side of the hot water supply pipeline from the hot water supply machine and the downstream side of the hot water supply pipeline branch point of the water supply pipeline are connected by a communicating pipeline, and the downstream side of the hot water supply pipeline branch point of the water supply pipeline is connected with a first reverse A stop valve is provided, and the communication pipe is equipped with a second check valve, a heat exchanger, a circulation pump,
Third check valves are sequentially provided, and a bathtub water circulation path is provided between the heat exchanger and the bathtub.

(Function) According to the above configuration, when hot water is supplied to the bathtub, the third check valve stops the water flowing from the water supply pipe to the communication pipe, and the water from the water supply source flows into the water supply pipe. When the circulation pump stops the hot water flowing from the hot water supply pipe to the communication pipe, the hot water from the water heater is sent to the mixer faucet via the hot water supply pipe, and these Mix hot water to the appropriate temperature using a mixing faucet and discharge water into the bathtub.

In addition, when reheating the bathtub water, the hot water from the water heater that flows into the communication pipe from the hot water supply pipe is operated by the second check valve, the heat exchanger,
The hot water flows backward through the water supply pipe through the circulation pump and the third check valve, and the first check valve stops the hot water flowing backward through the water supply pipe, so that the hot water is supplied from the hot water supply pipe. Circulate to machine. Then, this circulating flow heats the bathtub water circulating in the circulation path via a heat exchanger, thereby reheating the bathtub water.

Next, in the unlikely event that the heat exchanger is damaged, contaminated bath water in the bath water circulation path will flow into the communication pipe, but from the upstream side of the communication pipe
The check valve, the heat exchanger, and the third check valve of the circulation pump are arranged in this order, so unless the circulation pump is used, the second check valve and the circulation pump function to stop water.
It is possible to prevent the water supply pipe and the hot water supply pipe from being contaminated by bath water.

In addition, since the third check valve is disposed downstream of the circulation pump, it is possible to prevent water pressure from the water supply pipe from being applied to the circulation pump, thereby increasing the resistance of the circulation pump.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in the drawing, the bath reheating device includes a hot water supply system A ₁ that mixes water from the water supply pipe 2 and hot water from the hot water supply pipe 1 and supplies hot water to the bathtub b, and the water supply pipe 2 and the hot water supply pipe. It consists of a bathtub water reheating system A and a bathtub water reheating system A and a bathtub water reheating system A and a bathtub water reheating system A and a bathtub water reheating system A and a bathtub water reheating system _A and a bathtub water reheating system.

Hot water system A ₁ is a water supply pipe 2 that connects to water supply source c.
, a hot water supply pipe 1 which is branched from the water supply pipe 2 and has a water heater a in the middle thereof, and each of these pipes 1,
The hot water supplied from the respective pipes 1 and 2 is mixed at an appropriate temperature with the mixing tap 3 and discharged into the bathtub b.

Branch point 2 of the hot water supply pipe 1 in the water supply pipe 2
A first check valve 9 is provided upstream of a and close to the branch point 2a.

The reheating system A ₂ has a high-temperature water circulation path that shares the piping path in the hot water supply system mentioned above, and a bathtub water circulation path 7.
It consists of.

The high-temperature water circulation path connects the downstream side of the hot water supply pipe 1 from the water heater a and the downstream side of the branch point 2a of the hot water supply pipe 1 in the water supply pipe 2 through a communication pipe 6, and this communication A second check valve 10, a heat exchanger 5, a circulation pump _P2 , and a third check valve 11 are sequentially arranged in the pipe line 6 with the hot water supply pipe line 1 side facing upstream.

The above-mentioned circulation pump P ₂ has the function of stopping the hot water flowing from the hot water supply pipe 1 to the communication pipe 6 when it is stopped (for example, a positive displacement pump), and the third check valve 11 has the function of stopping the hot water flowing from the hot water supply pipe 1 to the communication pipe 6. This is to stop the water flowing from the pipe 2 to the communication pipe 6, and by using these circulation pump P ₂ and the third check valve 11, the hot water in the hot water supply pipe 1 and the water in the water supply pipe 2 are stopped. is reliably sent to the mixing faucet 3 during hot water supply.

Even if the heat exchanger 5 is damaged and the bathtub water in the circulation path 7 flows into the communication pipe 6, the second check valve 10 works together with the circulation pump _P2 to stop the bathtub water. This prevents water from flowing into the water supply pipe 13.

Then, hot water, that is, high-temperature water that has flowed from the hot water supply pipe 1 into the communication pipe 6, is transferred from the second check valve 10 to the heat exchanger 5 to the circulation pump _P2 by the operation of the circulation pump _P2.
→The water flows backward through the water supply pipe 2 through the third check valve 11, and is further stopped by the first check valve 9, and then the water flows backward through the water supply pipe 2.
The water is circulated through the hot water heater a to heat the heat exchanger 5.

The operation of the circulation pump _P2 is prohibited when hot water is supplied to the bathtub. That is, the connection point 6a of the communication pipe line 6 in the water supply pipe line 2 and the mixing faucet 3
A flow switch 12 is provided between the mixing faucet 3 and the flow switch 12, which senses the flow of water in the direction of the mixing faucet 3 and closes the flow switch 12.
2 is connected to the circulation pump P ₂ via a control section (not shown), and the operation of the circulation pump P ₂ is prohibited when the flow switch 20 is closed. Also,
As described above, the circulation pump P ₂ performs a water stop function together with the second check valve 10 and prevents the bathtub water in the circulation path 7 from flowing into the water supply pipe 2 . Also, when it is detected that the heat exchanger 5 is damaged, the circulation pump P ₂
It is also possible to prevent contamination of hot water supply water by bathtub water.

A bathtub water circulation path 7 is formed between the heat exchanger 5 and the bathtub b, and this circulation path 7 includes a thermistor 8 that senses the temperature of the bathtub water and operates the circulation pump _P2. and a circulation pump _P1 for forcibly circulating the bathtub water.

The circulation pump _P1 is designed to operate at all times when the bathtub b is filled with bathtub water.

According to the bath reheating device of this embodiment as described above, the hot water from the hot water supply pipe 1 and the water from the water supply pipe 2 are mixed to a desired temperature by the mixing faucet 3, and a predetermined amount of water is poured into the bathtub b. Supply water (Figure 1).

Furthermore, when the hot water temperature in the bathtub decreases after the hot water supply is stopped, the thermistor 8 senses the decrease in the hot water temperature and activates the circulation pump _P2 , and between the water heater a and the heat exchanger 5, High-temperature water circulates through the hot water supply pipe 1, the communication pipe 6, and the water supply pipe 2 (FIG. 2). The heat exchanger 5 then heats the bathtub water circulating through the circulation path 7, and reheats the bathtub water to keep the temperature of the bathtub water substantially constant.

(Effect of the invention) Since the bath reheating device of the present invention is configured as explained above, it reheats the bath water by using the hot water supply pipe and the water supply pipe that are the hot water supply system to the bathtub, and also reheats the bath water. When hot water is supplied to the bathtub, hot water in the hot water supply pipe and water in the water supply pipe are reliably sent to the mixing faucet, and the mixing faucet at an appropriate temperature can be supplied to the bathtub.

In addition, in the event that the heat exchanger is damaged during reheating, the circulation pump is installed downstream of the heat exchanger so that the hot water in the bathtub water circulation path can be redirected to the hot water supply system. To prevent dirty hot water from flowing downstream, dirty hot water in the bathtub water circulation path is prevented from flowing into the hot water supply system.

Therefore, it is possible to omit piping dedicated to reheating, which was conventionally necessary, and construction can be easily performed.
Furthermore, it is possible to use a water heater that only has a hot water supply function as it is, which has the advantage of preventing the water heater from becoming larger.

In addition, even if the heat exchanger is damaged, contaminated bath water in the bath water circulation path will flow into the communication pipe, but from the upstream side of the communication pipe, the second check valve Since the exchanger, circulation pump, and third check valve are arranged in this order, unless the circulation pump is used, the second check valve and circulation pump function to stop water, and the water supply pipe is blocked by bath water. and can prevent hot water supply pipes from being contaminated.

In addition, since the third check valve is disposed downstream of the circulation pump, it is possible to prevent water pressure from the water supply pipe from being applied to the circulation pump, thereby increasing the resistance of the circulation pump.

[Brief explanation of the drawing]

The drawings are simplified diagrams showing one embodiment of the bath reheating device of the present invention, with FIG. 1 showing the hot water supply state and FIG. 2 showing the reheating state. In addition, in the figure, a: water heater, 1: hot water supply pipe, c: water supply source, 2: water supply pipe, 3: mixer faucet, b: bathtub,
A ₁ : Hot water supply system, 9: First check valve, 10: Second check valve, 11: Third check valve, 5: Heat exchanger, P ₂ : Circulation pump, A ₂ : Reheating system, 7 : Bathtub water circulation path.

Claims (1)

[Scope of utility model registration request] It has a hot water supply system that connects a water supply pipe that connects to a water supply source, and a hot water supply pipe that is branched from the water supply pipe and has a water heater placed in the middle, and connects it to a mixing faucet. The downstream side and the downstream side of the hot water supply pipe branching point of the water supply pipe are connected by a communicating pipe, and a first check valve is provided upstream of the hot water supply pipe branching point of the water supply pipe, and the communicating pipe 2nd line with the hot water supply pipe side upstream.
A bath reheating device comprising a check valve, a heat exchanger, a circulation pump, and a third check valve sequentially provided, and a bathtub water circulation path provided between the heat exchanger and the bathtub.