JPH071122B2 - Control method for 1-can 2-circuit hot water bath kettle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for controlling a one-can, two-circuit type hot-water bathtub.

(Prior Art) Conventionally, in a one-can, two-circuit type hot water bath bath, the heat absorption amount of the hot water passing through the bath-side can body is constant, as disclosed in Japanese Patent Laid-Open No. 1-314845. There is provided a device for controlling the circulating amount of hot water so that the above, and a capacity control device for controlling the hot water supply temperature on the hot water supply side to a predetermined set temperature.

(Problems to be Solved by the Invention) In the above-mentioned conventional example, in the transitional period from when hot water supply is started when the bath heating is used alone to when the temperature reaches the set temperature and stabilizes, The amount of heat absorbed by the bath was reduced to the target value.
At this time, the amount of heat absorption required for the hot water supply side is calculated from the incoming water temperature, the set temperature, and the flow rate, and the total amount of heat absorption is added to the target value of the amount of heat absorption on the bath side. It was performed by the capacity control device. However, when the target value of the heat absorption amount on the bath side differs from the actual heat absorption amount, the heat absorption amount on the hot water supply side also differs from the actual heat absorption amount, so the hot water outlet temperature also differs from the set temperature. However, there is a problem that it takes time to reach the set temperature even if the hot water temperature is fed back and the amount of gas is adjusted to eliminate this difference.

The present invention has been made in view of the above problems, and it is a one-can-two-circuit system that stabilizes the hot water discharge performance during the transition period from when hot water supply is started when the bath heating is used alone until the temperature reaches the set temperature and stabilizes. An object of the present invention is to provide a method for controlling a hot-water supply bath kettle.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a method for controlling a one-can, two-circuit hot water supply bath kettle. The control device is characterized in that the hot water is supplied to the bath-side can body once with a flow rate of 0, and the hot water is supplied and the bath is heated at the same time after the hot water supply temperature stabilizes.

(Example) Hereinafter, the present invention will be specifically described with reference to the drawings. In the figure, (1) is a can body in which the hot water supply side can body (1a) and the bath side can body (1b) share the fin (2). (3) is a hot water supply side can body hot water temperature sensor consisting of a thermistor, (4) is a water amount sensor for detecting the hot water supply flow rate, (5) is a water temperature sensor consisting of a thermistor, (6) is a fixed type water governor. It is provided in the circuit (10). (7) is a water flow control valve,
The hot and cold water mixing ratio is adjusted so that the hot water mixing temperature, which is provided in the first bypass water channel (9) and is detected by the hot water mixing temperature sensor (8) including a thermistor, becomes a set temperature.
(11) is a gas solenoid valve, (12) is a gas proportional valve, (13) is a burner that heats the can body, (14) is a signal from the temperature sensor or water amount sensor, and controls the heating amount of the burner. Capacity control circuit, which constitutes a capacity control device. (2
The bath circulation circuit (0) is a bath temperature sensor (24) consisting of a circulation pump (25) for forced circulation of bath water and a thermistor.
A ball type water amount sensor (22) and a bath-side hot water temperature sensor (26) including a thermistor for detecting the circulating hot water temperature. (23) is a switching servo valve and a circulation pump (25)
And a ball type water amount sensor (22) and a branch point of the second bypass channel (28). Reference numeral (27) is a circulation amount control circuit which receives signals from the above-mentioned sensors to drive and control loads such as a circulation pump and a switching servo valve (23), and constitutes a circulation amount control device together with the above loads. .

Next, the control method in the above configuration will be described with reference to the flowchart in FIG. In this one-can, two-circuit type hot water bath kettle, when the bath heating is used independently (step 1), the switching servo valve (23) is moved to the bath side can body (1b) side by the circulation amount control circuit (27). By switching, the flow rate of the second bypass channel (28) is set to 0 so that the entire amount of bath water flows through the bath side can body (1b) (step 2). The capacity control circuit (14) controls the opening of the gas proportional valve (12) so that the amount of gas is constant when the bath is used alone (step 3). When hot water is used while using the bath heating alone as described above (step 4), the switching servo valve (23) should be completely switched to the second bypass channel (28) side. The flow rate QF of the bath-side can body (1b) is reduced to 0 so that all the bath water flows through the bypass water channel (28) (step 5). That is, the amount of heat absorbed by the bath is set to zero. Next, the capacity control circuit (14) obtains a gas amount when the hot water is used alone from the detection values of the water amount sensor (4) and the water temperature sensor (5) (step 6), and the hot water supply side can body hot water temperature sensor (3) The detected value of is fed back to control the opening of the gas proportional valve (12) so as to reach the set temperature (step 7). in this case,
There is no effect of the amount of heat absorbed by the bath, and the temperature of the hot water on the hot water supply side immediately reaches the set temperature and stabilizes. After the capacity control device (14) detects that the detection value of the hot water temperature sensor (3) has stabilized (step 8), the bath water is circulated through the bath side can body (1b) to supply hot water and heat the bath. Start simultaneous use (steps 9 to 1)
1).

(Effects of the Invention) As described above, the present invention is a one-can, two-circuit type hot water bath kettle, and in the transition period from when hot water starts to be used when bath heating is used alone to when the temperature reaches a set temperature and stabilizes, circulation amount control is performed. Since the apparatus once controlled the flow rate of the bath-side can body to 0 so as to use the hot water alone, the hot water supply performance became stable.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention. FIG. 2 is a flow chart showing the operation of the present invention. (1) …… Can body (1a) …… Hot water side can body (1b) …… Bath side can body (2) …… Fin (14) …… Performance control circuit (25) …… Circulation pump (27)… Circulation amount control circuit

Claims (1)

[Claims] 1. A hot-water supply side can body 1a and a bath-side can body 1b sharing a fin, a hot water supply temperature sensor 8 provided on the hot water supply side can body for detecting a hot water supply side hot water temperature, and heating the can body. The burner 13, the proportional valve 12 that adjusts the amount of fuel supplied to the burner in order to adjust the amount of heat to be heated by the burner, and the opening of the proportional valve is controlled and the stability of the detected value of the hot water temperature sensor is determined. 1-can 2-circuit hot water supply provided with a capacity control circuit 14, a switching servo valve 23 for adjusting the amount of bathtub passing through the bath-side can body, and a circulation amount control circuit 27 for controlling switching of the switching servo valve. In the bath heater, when the bath heating is used independently, the switching servo valve is switched to the bath side can body by the circulation amount control circuit and the bath water is poured into the bath side can body, and when hot water supply is used when the bath heating is used alone, Circulation amount control circuit Switch the switching servo valve so that the flow rate becomes 0, and once use hot water independently, and after the capacity control circuit determines that the detected value of the hot water temperature sensor is stable, the switching servo valve is switched to the bath side by the circulation amount control circuit. A method for controlling a one-can, two-circuit type hot water bath kettle, characterized by switching to the can side and flowing hot water to the bath side can for simultaneous use of hot water and bath heating.