JPH01222141A - Heating device for both hot water heating and bath - Google Patents

Abstract

PURPOSE:To permit the automatic control of the supplementing of water, by a method wherein three-way valves, provided in both of the circulating pipes of a hot-water heater, are switched alternately by proper times into additional heating operation and the operation of a room heating circuit. CONSTITUTION:When circulating water is reduced due to evaporation, a float switch FS detects a low water level in a circulating water tank 15 and switches three-way valves 5, 6 automatically to start the additional heating of a bathtub 10. After a given period of time, the three-way valves 5, 6 are switched automatically to operate a room heating circuit for a fan coil unit 13 for room heating. When a water temperature has arrived at a first set temperature, the three-way valves 5, 6 are switched automatically by a thermistor 9 to effect the additional heating operation of the bathtub 10. When the water temperature has arrived at a second set temperature by the additional heating of the bathtub 10, the thermistor 9 switches the three-way valves 5, 6 automatically to effect the operation of the room heating circuit for the fan coil unit 13 for heating. The additional heating operation and the operation of the room heating circuit are effected alternately by a predetermined times in such a manner whereby the circulating water may be supplemented automatically.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a so-called can dual-circuit type hot water heating and bath heating device that heats hot water for hot water heating and bath heating using a single heater. It is related to.

[Prior art]

Conventionally, in a hot water heating and bath heating device, as shown in FIG. , a water flow switch 8, and a thermistor 9, and the three-way valve 5.6 is provided with a bath circulation circuit consisting of a circulation pipe 1112 and a bathtub 10, a circulation pipe 16 connected to the three-way valve 5, and a circulation water tank 1.
A heating circulation circuit consisting of a ring pipe 14, a heating fan coil unit 13, and a circulation pipe 17 is connected in a switchable manner, and a water supply pipe 118 having a solenoid valve 117 is connected to the top opening of the circulation water tank 15. It was installed.

[Problem to be solved by the invention]

Conventional hot water heating and bath heating devices are configured as described above, so when automatically replenishing water to the circulating water tank to compensate for the decrease in circulating water due to evaporation, an electromagnetic pipe is connected to the water supply pipe. A valve is indispensable, and in order to open and close the solenoid valve, the structure becomes multiple, the number of parts increases, and there is a problem in that the production cost becomes high economically.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bath heating device that can automatically control water replenishment with a simple and inexpensive configuration similar to manual water replenishment.

[Means to solve problems]

In order to achieve the above object, the bath heating device for hot water heating and bath heating of the present invention is a one-can, two-circuit type hot water heating device that heats hot water for hot water heating and bath heating with a single heater. By switching the three-way valve installed in the recirculation pipe of the heater, reheating operation of the bathtub is started when the circulating water in the heating circuit decreases, and after a predetermined period of time, the three-way valve is switched to operation of the heating circuit, and the water temperature is increased. When the first set temperature is reached, the three-way valve is switched to reheating operation, and when the water temperature drops below the second set temperature, the three-way valve is switched to heating circuit operation,
Circulating water is replenished by alternately switching between reheating operation and heating circuit operation an appropriate number of times.

[Function] In the hot water heating/bath heating device with the above configuration, since the second set temperature is lower than the first set temperature, the heat exchanger of the hot water heater and the recirculation pipe between the two three-way valves are The weight of the water present in the bathtub is greater when it drops below the second set temperature due to reheating operation of the bathtub than when it reaches the first set temperature due to operation of the heating circuit. By switching between operation and heating circuit operation, 2.
The water present in the heat exchanger and recirculation pipe of the hot water heater between the three-way valves is exchanged, i.e. the amount (weight) of water present when the bathtub is reheated and the amount present when the heating circuit is operated. This means that the difference in the amount of water (weight) is transferred from the circulation circuit of the bathtub to the heating circuit, and the circulation water is replenished to the heating circuit.

〔Example] An embodiment of the present invention will be described based on FIG.

Return side circulation pipe 3 connected to the heat exchanger 2 of the hot water heater 1
and the outgoing circulation pipe 4 are connected to the three-way valve 5.6, respectively,
The return side circulation pipe 3 is provided with a circulation pump 7, a water flow switch 8, and a thermistor 9. The three-way valve 5 has a bathtub 1
A return circulation pipe 11 for the bath from 0 and a pipe 16 connected to the return circulation pipe 14 for heating from the heating fan coil unit 13 via a circulation water tank 15 are switchably connected. A return circulation pipe 12 for a bath and a return circulation pipe 17 for heating are connected to the three-way valve 6 so as to be switchable. Each circulation pipe 12, 14, 17 is provided with a drain plug 18, respectively.

In the circulating water tank 15, a water supply pipe 19 and an overflow pipe 20 are opened for communication, and a float switch FS for detecting the water level in the circulating water tank 15 is provided.

To explain the operation of this embodiment, when the circulating water decreases due to evaporation, the float sinch FS detects a low water level in the circulating water tank 15, and manually switches the three-way valve 5.6 to the position shown in the figure to remove the water from the bathtub 15. (The reheating of the bathtub 10 may be started automatically.)

After reheating the bathtub 10 for a certain period of time, the three-way valve 5.6
heating fan coil unit 13.
When the water temperature reaches the first set temperature (temporarily 80°C), the thermistor 9 detects this and automatically switches the three-way valve 5.6 to open the bathtub as shown in the figure. Perform 10 reheating operations. When the water temperature falls below the second set temperature (temporarily assumed to be 50°C) due to reheating operation of the bathtub 10, the thermistor 9 automatically switches the three-way valve 5.6 to supply heating to the heating fan coil unit 13. Operate the circuit. In this way, by alternately performing the reheating operation and the heating circuit operation a predetermined number of times, the circulating water is automatically replenished. Note that there is no need to supply water from the water supply pipe 19 at this time.

(Effects of the Invention) As configured as described above, the present invention has the following effects.

The water present in the outbound and return circulation pipes to the hot water heater between the two three-way valves and the heat exchanger is transferred to the bathtub by switching between the reheating operation of the bathtub and the operation of the heating circuit. The vIN ring circuit and the heating circuit are interchangeable, but due to the temperature difference between the first set temperature (hypothetical value 80°C) and the second set temperature (hypothetical value 50°C), the reheating operation of the bathtub is Because the specific gravity of water differs depending on the time and when the heating circuit is operating,
The weight of water present in the heat exchanger and the outward and return circulation pipes to the hot water heater between the two three-way valves is different during both operations. Using the assumed value, when the water temperature drops from 80＠C to 50°C, it is approximately 1! (can be confirmed by experiment), that is, at the time the bathtub reheating operation is switched to the heating circuit operation, the outgoing and return side circulation to the hot water heater between the two three-way valves This means that the amount of water present in the pipes and heat exchanger is approximately 15 g per 12 times more than when the heating circuit was in operation before the reheating operation.

In other words, the water in the circulation circuit including the bathtub flows into the heating circuit by 15 minutes.
This means that he was given gf3. Therefore, if the switching operation between the reheating operation of the bathtub and the operation of the heating circuit is performed 10 times, the amount of circulating water can be increased by 150 g. The above explanation has been made using the weight of water, but it goes without saying that an increase in weight results in an increase in volume converted into specific gravity at a predetermined temperature.

In this way, it is possible to automatically replenish circulating water by simply switching the three-way valve, and at that time, there is no need to operate the lees water electricity (valve A), so the structure is simple and inexpensive. A bath heating device for hot water heating can be provided.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional example. 1-Hot water heater, 2-Heat exchanger, 3-Return side circulation pipe, 4
... Outward circulation pipe, 5.6-Three-way valve, 7-Circulation pump, 8-Water flow switch, 9-Thermistor, 10--Bathtub, 11.12-Bath circulation pipe, 13-Fan coil unit, 14.17 - Heating circulation pipe, 15 - Circulation water tank, 19 - Water supply pipe, FS - Float switch.

Claims (1)

[Claims] (1) In a one-can two-circuit type hot water heating device that heats hot water for hot water heating and hot water for bath heating using a single heater, reheating operation of the bathtub is started when the circulating water in the heating circuit decreases, After a predetermined period of time, the heating circuit operation is switched on, and when the water temperature reaches the first set temperature, it is switched to the reheating operation, and when the water temperature falls below the second set temperature, it is switched to the heating circuit operation, and the reheating operation and the heating circuit are activated. A hot water heating and bath heating device characterized in that circulating water is replenished by alternately operating the bath.