JPH0243974B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bath water supply device having a bath reheating function and a hot water supply function.

Structure of conventional example and its problems As shown in FIG. 1, this type of conventional bath water heater has a hot water supply heat exchanger 1 installed inside, and a can body 3 storing a heat medium 2 for antifreeze liquid is used to store water in a bathtub 4. connected to a bath heat exchanger 5 for heating by an outgoing pipe 6 and a returning pipe 7,
A closed circuit was formed. When the heating medium 2 in the can body 3 is heated by the burner 8, the temperature of hot water is raised in the hot water heat exchanger 1, and the hot water is supplied to the bathtub 4 of the bath.
Furthermore, if you want to raise the temperature of the hot water in the bathtub 4 after hot water has been supplied, the pump 9 provided in the outgoing pipe 6 circulates the high temperature heat medium 2 in the can body 3 to the bath heat exchanger 5. I was reheating the bath. This configuration requires maintenance such as replenishment of the antifreeze solution due to evaporation of the heat medium 2 and control of the concentration of the solution, and there are also problems in that the pump 9 is used at high temperatures, which may cause failures.

Purpose of the invention The present invention solves such conventional problems,
The purpose of the present invention is to realize an economical bath water heater that does not require maintenance and management of heating medium, is highly reliable, and has low running costs.

Structure of the Invention In order to achieve this object, the present invention includes a generator that evaporates a working fluid as a latent heat medium and has a hot water supply heat exchanger installed therein, and a bath heat exchanger that heats water in a bathtub. A return pipe connects the liquid storage tank, which is installed above the generator and has a liquid level detection means inside, to the bath heat exchanger. The generator is connected by a return pipe through a valve, and the upper part of the generator and the upper part of the liquid storage tank are connected by a communication pipe through a valve that opens and closes in response to a signal from the liquid level detection means. With this configuration, the reheating circuit of the bath becomes a closed circuit containing the hydraulic fluid as a latent heat medium, so the hydraulic fluid is not released into the atmosphere, and maintenance such as replenishment is not required. Furthermore, the working fluid is heated and evaporated to allow natural circulation, allowing heat to be transferred without power.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 2, a generator 11 is equipped with a hot water heat exchanger 1 and a working fluid 10 as a latent heat medium is sealed under reduced pressure.
is connected by an outgoing pipe 6 to a bath heat exchanger 5 that heats hot water in the bathtub 4. A liquid storage tank 13 having a float 12 therein as liquid level detection means is provided above the generator 11, and is connected to the bath heat exchanger 5 by a return pipe 7 via a check valve 14a. The lower part of the liquid storage tank 13 and the generator 11 were connected by a return pipe 15 via the check valve 14b, and the upper part of the liquid storage tank 13 and the upper part of the generator 11 were directly connected to the shaft of the float 12. They are connected via a valve 16 and a communication pipe 17 . The burner 8 that heats the generator 11 controls the gas flow rate according to the signal from the pressure sensor 18 provided in the generator 11 via the control valve 1.
9 and configured to be regulated by the generator 11
The internal pressure can be arbitrarily set using the setting device 20. On the other hand, a shutoff valve 21 is provided on the outgoing pipe 6,
A water supply pipe 22 is connected to the inlet of the heat exchanger 1 for hot water supply, and a hot water supply pipe 23 is connected to the outlet thereof.
Note that the same members as in FIG. 1 are given the same numbers.

In the above configuration, when hot water is supplied to the bathtub 4, the generator 11 is heated by the burner 8 with the stop valve 21 closed, and the working fluid 10 is evaporated. On the other hand, when the hot water supply pipe 23 is opened, the generator 1
The steam of the working fluid 10 condenses outside the hot water supply heat exchanger 1 in the hot water supply heat exchanger 1, and the temperature of the water supply rises within the hot water supply heat exchanger 1 by receiving the latent heat of condensation, and the high temperature hot water passes through the hot water supply pipe 23. , hot water is supplied to the bathtub 4. At this time, setting device 2
By setting the pressure in the generator 11 to a predetermined value by setting the pressure in the generator 11 to a predetermined value by using You can get the temperature of the water.

On the other hand, if the temperature of the water in the bathtub 4 has decreased and you want to heat the water, close the stop valve 21 and turn the burner 8
The working fluid 10 in the generator 11 is heated. When heating starts, there is no working fluid 10 in the liquid storage tank 13, so the float 12 is at the lowest position and the valve 16 is closed.
is in a closed state. Therefore, when the internal pressure of the generator 11 rises, the high-temperature working fluid 10 is forced through the outgoing pipe 6 to the bath heat exchanger 5, radiates heat to the hot water in the bathtub 4, becomes low temperature, and passes through the returning pipe 7. Liquid storage tank 13
flows into. As the liquid level of the working fluid 10 in the liquid storage tank 13 rises, the float 12 also rises, and eventually the valve 16 becomes open, and the steam in the generator 11 passes through the communication pipe 17 to the liquid storage tank 13. be introduced. Therefore, since the internal pressures of the generator 11 and the liquid storage tank 13 are approximately equal, the working fluid 10 in the liquid storage tank 13 is returned to the generator 1 through the return pipe 15 due to its own weight.
1. When the liquid level of the working liquid 10 in the liquid storage tank 13 falls, the float 12 also falls, and the valve 16 also closes, returning to the initial state, so that the working liquid 10 is again forced to be sent to the bath heat exchanger 5. becomes. Thereafter, by repeating the same operation, the heat obtained by the generator 11 can be transferred to the bath heat exchanger 5 and the hot water in the bathtub 4 can be heated. Furthermore, by using a heating radiator such as a fan coil unit in place of the bath heat exchanger 5, it can also be used as a heating system.

Effects of the invention (1) Since the circuit connecting the generator of the heating part and the bath heat exchanger which is the heat radiating part constitutes a closed circuit, the enclosed heat medium is not discharged outside the circuit. There is no need for maintenance management such as replenishment of heat medium.

(2) The heat medium conveyance for reheating the bath uses the vapor pressure that accompanies the evaporation of the latent heat medium, so it does not consume electrical energy like a pump and does not have high-speed sliding parts. Therefore, an economical and highly reliable device can be realized.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional bath water supply device, and FIG. 2 is a block diagram showing an embodiment of the bath water supply device of the present invention. 1... Heat exchanger for hot water supply, 4... Bathtub, 5... Heat exchanger for bath, 6... Outgoing pipe, 7... Returning pipe, 10...
... Working fluid, 11 ... Generator, 12 ... Float (liquid level detection means), 13 ... Liquid storage tank, 14 ...
Check valve, 15...Return pipe, 16...Valve, 17...Communication pipe.

Claims (1)

[Claims] 1. A generator that evaporates a working fluid as a latent heat medium, a hot water heat exchanger installed inside the generator, a bath heat exchanger that heats water in a bathtub, and a hot water supply heat exchanger installed above the generator. a liquid storage tank having a surface detection means therein; an outgoing pipe connecting the generator and the bath heat exchanger; a return pipe connecting the bath heat exchanger and the liquid storage tank; a return pipe connecting the lower part of the liquid storage tank and the generator; a communication pipe connecting the upper part of the generator and the upper part of the liquid storage tank; and a line of the communication pipe in response to a signal from the liquid level detection means. A bath water supply device comprising a valve that opens and closes and a check valve provided in the return pipe.