JPS6269061A - Bath boiler - Google Patents

Abstract

PURPOSE:To obtain jet bubbles and to reduce a radiation loss by providing a three-way changeover valve connected to a pipeline leading to a downstream pipeline of a pump, an upstream pipeline of a heat exchanger and a bathtub, and forming a venturi part in a pipeline leading to the bathtub. CONSTITUTION:A three-way changeover valve 8 is provided in a downstream pipeline of a self-suction type pump 7, and further is connected to a hot waver return pipe 9 and a jet pipe 12, respectively. Further, an air suction pipe 14 is connected to the slot portion 13a of a venturi part 13 of the jet pipe 12 whereby a jet having an ample flow amount and an ample flow speed and containing a lot of bubbles is obtained. At the time of functioning a jet hot water bath, by changing over the three-way changeover valve 8, a jet circuit in a route of bathtub 5 self-suction type changeover valve 8 jet pipe 12 venturi part 13 jet port 15 bathtub 5, is formed. By the venturi effect of the venturi part 13, a lot of bathroom bubbles are obtained from the air suction pipe 14 into the jet, and bubbles are produced in bathwater. Since the jet circuit can be constructed with short pipelines, a water flow resistance in the bathwater can be reduced, the flow amount and flow speed of the jet can be made large. Further, the radiation loss of the pipelines can be restricted to the minimum.

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 pump and a heat exchanger.

BACKGROUND OF THE INVENTION Conventionally, this type of bath heating device only had the function of heating the bathtub with a spit, which was insufficient in response to the recent pursuit of comfort functions that rely on generating jets 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 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 transferred to the gas heater 3.
The heated water flows through the hot water inlet pipe 10 and the bathtub population 11,
The person enters the bathtub 5, and by continuously repeating this process, the water in the bathtub s 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 temperature in the bathtub reaches an appropriate temperature and the heater is stopped, the hot water pipe is thin and long. , sufficient flow rate and velocity cannot be secured.

In addition, the only way to ensure this is to make the pipes thicker and shorter, or to increase the pump capacity. Also, the pipe line 9.
10, and because the discharge also passes through the heat source device 1, there is a problem that the discharge loss becomes large and the temperature of the hot water in the bathtub decreases.

In view of the above-mentioned problems, the present invention aims to improve the flow rate and
Ensuring sufficient flow velocity to provide a comfortable bathing experience with a jet stream, and achieving an efficient running water bath with little heat loss, which means your intestines won't get cold, and a bubble bath function that mixes air bubbles into the jet stream. To provide a bath heating device easily and inexpensively.

Means for Solving the Problems In order to solve the above problems, the bath heating device of the present invention has the following features:
a three-way switching valve connected between the downstream pipe of the pump and the upstream pipe of the heat exchanger and connected to the pipe to the bathtub, and forming a venturi part in the pipe to the bathtub; A tube is led out from the throat, and the end of the tube is positioned above the water level of the bathtub, and is opened to the atmosphere (bathroom open).

Effect of the present invention With the above-described configuration, by switching the three-way valve, the pipe line that generates the jet flow in the bath water is shortened, water flow resistance is reduced, and a larger flow rate and flow velocity can be obtained with a pump of the same capacity. Moreover, since it does not go through a heat exchanger etc., heat radiation loss is reduced. In addition, air is sucked into the venturi section of the pipe leading to the bathtub, and many air bubbles are mixed into the jet stream. In addition, by switching the three-way switching valve, the heating function of a conventional bath can be maintained.

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

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

FIG. 1 shows the configuration of a bath heating device according to an embodiment of the present invention. The same parts as those in the conventional technology described above are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained. . Reference numeral 8 denotes a three-way switching valve, which is provided in the hot water return pipe 9 between the downstream of the self-priming pump 7 and the upstream of the heat exchanger 2.

A jet pipe 12 connects the three-way switching valve 8 and the bathtub 5. 14 is an air suction pipe connected to the throat part 13a of the venturi part 13, and the venturi part 1a is provided in the middle of the jet pipe 12. 15, the jet port 16 indicates the water level of the bathtub 5.

Figure 1 shows the bath heating device configured as described above.
The operation will be explained using FIG. 2.

First, when heating a bath, a hot water circuit consisting of the bathtub 5 - self-priming pump 7 - three-way switching valve 8 - hot water return pipe 9 - heat exchanger 2 - hot water outgoing pipe 10 - bathtub 5 is formed to heat the bath.

On the other hand, when the jet hot bath function is activated, by switching the three-way switching valve 8, a jet stream consisting of the bathtub 5, the self-priming pump 7, the three-way switching valve 8, the jet pipe 12, the vent IJ, the $13, the jet port 15, and the bathtub 5 is activated. This will form a circuit. At this time, the venturi section 13 has the configuration shown in FIG. 2, so that many bathroom air bubbles are taken into the jet stream by the air suction pipe 14 due to the venturi effect, and bubbles are generated in the bath water. Furthermore, since the jet circuit can have a short pipe line, it is possible to reduce the flow resistance of the pipe line, increase the flow rate and flow velocity of the jet flow, and also minimize the heat radiation loss from the pipe line.

Note that the pipe end of the air suction pipe 14 is connected to the water level 16 of the bathtub 5.
By keeping the hot water in the bathtub 5 at a higher level, even when the operation is stopped, the hot water in the bathtub 5 will not flow backward and overflow from the end of the air suction pipe 14.

As described above, the three-way switching valve 8 is provided in the downstream pipeline of the self-priming pump 7, is connected to the hot water return pipe 9 and the jet pipe 12, and is connected to the throat part of the venturi part 13 of the jet pipe 12. By connecting an air suction pipe to 13a, a jet stream with a sufficient flow rate and a large number of bubbles can be obtained, and furthermore, a drop in the temperature of the hot water in the bathtub can be prevented.

Effects of the Invention As described above, the present invention includes a three-way switching valve connected between the downstream pipe of the pump and the upstream pipe of the heat exchanger, and connected to the pipe to the bathtub. By forming a venturi part in the pipe line, guiding the pipe line from the throat part, positioning the pipe end above the water level of the bathtub, and opening it to the atmosphere, there is a sufficient flow rate and flow rate in the bathtub. It provides a jet stream that is large and contains bubbles, and prevents the temperature of the water in the bathtub from dropping, making it easy to enjoy a warm bath function with a comfortable and efficient jet stream.
Moreover, it can be realized at a low cost, and the conventional heating function can provide the same performance.

[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 partially enlarged sectional view of FIG. 1, and FIG. 3 is a block diagram of a conventional bath heating device. 2... Heat exchanger, 5... Bathtub, 7...
・Self-priming pump, 8... Three-way switching valve, 9...
...Hot water return pipe, 10...Hot water outgoing pipe, 12...
...Jet tube, 13 Venturi, 14...
・Air suction pipe, 16... water level. Name of agent: Patent attorney Toshio Nakao and 1 other person13
---Hentaiyuso 14--1 air opening 2βI) 1 Hi 16--Ki 1 water surface

Claims (1)

[Claims] A pump that sucks up water in the bathtub, a heat exchanger that directly heats the water sucked by the pump, and a pipeline that is connected between the downstream pipe of the pump and the upstream pipe of the heat exchanger, and that is connected to the bathtub. a three-way switching valve connected to the bathtub, a venturi section is formed in the pipeline to the bathtub, a tube is led out from the throat section, and the tube end is positioned above the water level of the bathtub, and A bath heating device open to the atmosphere.