JPS6269062A - Bath heater - Google Patents

Abstract

PURPOSE:To obtain comfortableness in taking bath due to a jet and to reduce a radiation loss by providing a three-way changeover valve connected to the downstream side of a self- suction type pump and the upstream pipeline of a heat exchanger, further connected to the downstream pipeline or the upstream pipeline of the heat exchanger via a bypass pipe or connected to the downstream pipeline of the heat exchanger and further connected to the downstream pipeline of a self-suction type pump via bypass pipe. CONSTITUTION:When heating the bath, a self-suction type pump 7 is operated and a three-way changeover valve 8 is changed over to a hot water return pipe 9, a hot water circuit having a route of bathtub 5 self-suction type pump 7 three-way changeover valve 8 hot water return pipe 9 heat exchanger 2 hot water outgoing pipe 10 bathtub 5, is formed, and hot water circulates on this circuit to heat the bath water. At the time of functioning as a flowing water hot bath, the three-way changeover valve 8 is changed over to the side of a bypass pipe 12 whereby a flowing water circuit on a route of bathtub 5 self-suction type pump 7 three-way changeover valve 8 bypass pipe bathtub inlet 11 bathtub 5, is formed. Therefore,since the pipeline is short and a passing water resistance is small, a sufficient flowing water hot bath function can be obtained and the radiation loss from pipelines can be restricted to the minimum. Hence,the lowering of the temperature of hot water within the bathtub can also be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bath heating device that directly heats water in a bathtub using a self-priming pump and a heat exchanger.

BACKGROUND OF THE INVENTION Conventional bath heating devices of this type have only the function of boiling the bath, and are insufficient in response to the recent pursuit of comfort functions using the water flow generated in the bath water in the bathtub.

An example of a conventional bath heating device will be described below with reference to the drawings.

Figure 3 shows the configuration of a conventional gas bath heating device.
1 is a heat source device, 2 is a heat exchanger, 3 is a gas heater, 4 is a bath device, 5 is a bathtub, 6 is a bathtub outlet, 7 is a self-priming pump, 9
1 is a hot water return pipe, 10 is a hot water outgoing pipe, and 11 is a bathtub entrance.

The operation of the bath heating device configured as described above will be explained below.

Water that enters the heat exchanger 2 from the bathtub 5 via the bathtub outlet 6 and the hot water return pipe 9 by the self-priming pump 7 is heated by the gas heater 3 and flows through the hot water outgoing pipe 10° and the bathtub inlet 11.
Enter bathtub 5. By continuously repeating this, the water in the bathtub 5 is boiled.

Problems to be Solved by the Invention However, with the above configuration, if you want to obtain a comfortable hot bath function using water flow after the water in the bathtub reaches an appropriate temperature and the heater is stopped, the hot water pipe is thin and long. Unable to secure sufficient flow rate and velocity.

In addition, the only way to ensure this is to make the pipes thicker and shorter, or to increase the pump capacity. In addition, the pipe line 9,
1o and the inside of the heat source device 1, there was a problem in that heat radiation loss was significant and the temperature of the hot water in the bathtub decreased.

In view of the above-mentioned problems, the present invention provides a comfortable bathing experience by ensuring sufficient flow rate and flow velocity with a single pump of the same capacity, and also provides efficient water flow with little heat loss, that is, the hot water does not cool. To provide a bath heating device capable of hot bath operation.

Means for Solving the Problems In order to solve the above problems, the bath heating device of the present invention has the following features:
Connect the downstream side of the self-priming pump to the upstream side line of the heat exchanger, and read the downstream side line of the heat exchanger or the upstream side line of the t/i exchanger through a bypass pipe. Alternatively, it is equipped with a three-way valve connected to the IJ line downstream of the heat exchanger and connected to the downstream line of the self-priming pump via a bypass line.

Effects of the present invention With the configuration described in -, by switching the three-way valve, the pipe resistance that generates a jet in the bath water is reduced, so that a larger flow rate and flow rate can be obtained with a pump of the same capacity, and, By shortening the pipe line, heat radiation loss is reduced, making it possible to obtain a running water hot bath function that is more comfortable and energy-saving.In addition, it becomes a device that does not degrade the conventional heating function.

EXAMPLE Hereinafter, a bath heating device according to an example of the present invention will be described with reference to the drawings.

Note that the same parts as those in the conventional example described above are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

Figure 1 shows R1ζ of a bath heating device in an embodiment of the present invention.
8 is a three-way I; T connected to the hot water return pipe 9 between the downstream side of the self-priming pump 7 and the upstream side of the heat exchanger 2.
The I switching valve is also connected to the outgoing pipe 1o on the downstream side of the heat exchanger 2 via the bypass pipe 12.

The operation of the gas bath heating device configured as described above will be explained. First, when heating the bath, operate the self-priming pump 7, and change the three-way switching valve 8 to the hot water return pipe 9. A hot water circuit is formed including the natural exchanger 2, the hot water inlet pipe 10, and the bathtub 5, and the bath water circulates through this circuit to heat the bath.

On the other hand, when using the running water hot bath function, the three-way switching valve 8 is connected to the bypass pipe 1.
By changing the 2nd side, the bath can be changed to 5-self-priming bomb 7-
Three-way switching valve 8 - bypass pipe 12 - bathtub inlet 11 - bathtub 5
This creates a running water circuit, and the pipes are short.
Since there is little resistance to water flow, the water flow is vigorously ejected into the bathtub 5, providing a comfortable hot bath function with running water.

FIG. 2 shows another embodiment of the present invention, which differs from the above embodiment in that a three-way switching valve 8 is provided downstream of the self-priming pump 7 and downstream of the heat exchanger, and a bypass pipe 12 is provided downstream of the self-priming pump 7 and downstream of the heat exchanger. This point is connected to the downstream side of the self-priming pump 7 via. The same effects as those of the above embodiment can be expected.

As described above, according to the above embodiment, the three-way switching valve is installed on the downstream side of the pump and in the hot water outgoing pipe through the hot water return pipe and the bypass pipe, or in the hot water outgoing pipe on the downstream side of the pump via the bypass pipe. By connecting each to the hot water return pipe, it is possible to ensure a sufficient flow rate and flow rate of water into the bathtub, and a sufficient running water hot bath function can be obtained. Heat radiation loss can also be kept to a minimum, and a drop in the temperature of the water in the bathtub can also be prevented.

Effects of the Invention As described above, the present invention provides a method for connecting between the downstream side of a self-priming pump and the upstream pipe line of a heat exchanger, or to the downstream pipe of a heat exchanger on the downstream side of a self-priming pump, In addition, by providing a three-way switching valve that is connected to the downstream pipe of the heat exchanger or the upstream pipe of the heat exchanger through the bypass pipe, it is possible to obtain a water flow with a sufficient flow rate and velocity in the bathtub,
In addition, it is possible to obtain a warm bath function with comfortable running water that prevents the temperature of the water in the bathtub from decreasing, and the conventional bath heating function can maintain the same performance as before.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a bath heating device according to an embodiment of the present invention, FIG. 2 is a block diagram of another embodiment, and FIG. 3 is a block diagram of a conventional bath heating device. 1...Heat source machine, 2...Heat exchanger, 4...
-Bath equipment, 5...Bathtub, 7...Self-priming pump, 8...Three-way exchange valve, 9...Hot water return pipe, 10...Hot water going Pipe, 12... bypass pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person! ?
---Nogui bus service

Claims (1)

[Claims] A self-priming pump that sucks water in the bathtub, a heat exchanger that directly heats the water sucked by the self-priming pump, and a pipe connected downstream of the pump and upstream of the heat exchanger. , and connected to the downstream line of the heat exchanger through a bypass pipe, or connected to the downstream line of the heat exchanger and connected to the downstream line of the self-priming pump through a bypass pipe. A bath heating device characterized by comprising a valve.