JPH074441Y2 - 1 can 2 circuit hot water bath kettle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a one-can, two-circuit type hot water bath kettle in which a hot water supply side can body and a bath side can body share fins.

(Prior Art) Conventionally, in a one-can, two-circuit type hot water bath kettle, as shown in, for example, Japanese Patent Application Laid-Open No. 1-314845, the hot water outlet temperature on the hot water supply side is controlled to a predetermined set temperature. Along with a capacity control device, a device that controls the calculated amount of circulation of the bath water so that the endothermic amount of the bath water passing through the bath-side can is constant during simultaneous use of hot water supply and bath heating There is.

In this, the heat absorption on the bath side was controlled to be constant regardless of the heat absorption on the hot water supply side. Therefore, there is a difference in the amount of heat absorption, and in the hot water supply side can body and the bath side can body, the fin body having a smaller heat absorption amount has a higher fin pipe temperature than the one having a larger heat absorption amount.

For example, if the hot water supply side has a water input temperature of 20 ° C and the amount of water input is 7 liters, and the bath side has a return hot water temperature of 20 ° C and the bath water circulation is 3 liters, one can 2
When the circuit can body was heated, the amount of heat absorbed was smaller on the bath side than on the hot water supply side, and the fin pipe was at a high temperature.

(Problems to be solved by the invention) However, if there is a temperature difference between the hot water supply side and the bath side fin pipes as in the above-described conventional example, a difference in thermal strain also occurs, and the fin pipes and the fins are joined together. There is a possibility that stress may be generated in a portion or the like to cause a crack, which is not preferable in terms of durability of the can body.

(Means for Solving the Problem) The present invention is intended to solve the above-mentioned conventional problems, and therefore, in the present invention, the hot water supply side can body and the bath side can body share fins. In, the hot water supply side temperature sensor, hot water supply side can body hot water temperature sensor, hot water supply water amount sensor, bath side temperature sensor for detecting the return hot water temperature of the hot water, bath side hot water temperature sensor, water quantity A sensor, a bath bypass channel connecting the inlet side and the outlet side of the bath water of the bath side can body, and a switching servo valve for adjusting the flow rate of the bath water of the bath side can body are provided, and the inlet temperature sensor and The heat absorption amount of the hot water supply side can body is calculated based on the temperature obtained from the hot water supply side temperature sensor and the hot water supply side water amount obtained from the hot water supply water amount sensor. Bath temperature sensor and bath-side hot water temperature equal to the amount of heat absorbed by the body The amount of water on the bath side is calculated based on the temperature obtained from the temperature sensor,
A circulation amount control device is provided to control the opening / closing degree of the switching servo valve so that the amount of water on the bath side becomes the calculated amount.

(Example) Hereinafter, the present invention will be specifically described with reference to the drawings.

In FIG. 1, (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 composed of a thermistor, (4) is a hot water supply water amount sensor for detecting a hot water supply flow rate,
(5) is a water temperature sensor consisting of a thermistor, (6) is a fixed water governor, which is provided in the hot water supply circuit (10). (7) is a water amount control valve, which is provided in the hot water supply bypass channel (9) and adjusts the hot and cold water mixing ratio so that the mixed hot water temperature detected by the mixed hot water temperature sensor (8) composed of a thermistor becomes a set temperature. is there. (11) is a gas solenoid valve,
(12) is a gas proportional valve, (13) is a burner that heats the can body,
(14) is a capacity control circuit for controlling the heating amount of the burner by receiving signals from the temperature sensors and the water quantity sensor, and constitutes a capacity control device. (21) is a bath circulation circuit,
A circulation pump (22) for forced circulation of bath water, a bath temperature sensor (24) consisting of a thermistor, a ball-type water amount sensor (25), and a bath side tap temperature sensor (26) consisting of a thermistor for detecting the circulating tap temperature. And are arranged. (23) is a switching servo valve, which is provided at the branch point of the water passage between the circulation pump (22) and the ball type water amount sensor (25) and the bath bypass water passage (28), and is sent out by the circulation pump (22). The flow rate of the bath water to the bath side can body (1b) and the bath bypass waterway (28) is adjusted. When the switching servo valve (23) is fully opened to the bath-side can body (1b) side, all the bath water delivered by the circulation pump (22) flows to the bath-side can body (1b). (27)
Is a circuit for controlling the load of the circulation pump, the switching servo valve (23) and the like by receiving a signal from each of the sensors in the circulation control circuit, and constitutes a circulation amount control device together with the load.

In this one-can, two-circuit type hot water bath kettle, when using hot water supply and bath heating at the same time, a circulation amount control circuit (27)
However, from the incoming water temperature QTC, the outgoing hot water temperature QTH, and the water quantity QQ obtained from the incoming water temperature sensor (5), the hot water supply side can body hot water temperature sensor (3), and the water quantity sensor (4), first, the heat absorption amount CQ on the hot water supply side. To calculate. The heat absorption amount CQ is calculated by CQ = QQ * (QTH-QTC).

Next, based on the return hot water temperature FTC obtained by the bath temperature sensor (24) and the hot water discharge temperature FTH obtained by the bath side hot water temperature sensor (26), the circulation amount control means (27) determines the heat absorption amount CF of the hot water supply side. The opening / closing degree of the switching servo valve (23) is controlled so as to be equal to the heat absorption amount CQ, thereby controlling the flow rate of the bath-side can body (1b). The flow rate QF at this time is calculated by QF = CQ / (FTH-FTC).

(Effects of the Invention) As described above, according to the present invention, since the heat absorption amounts on the bath side and the hot water supply side are equal to each other, the temperature difference between the fin pipes on both sides is eliminated, and the fin pipes and the fins are joined to each other. It is possible to prevent the occurrence of cracks, and thus it is possible to provide a one-can, two-circuit type hot-water bath kettle having excellent durability.

[Brief description of drawings]

FIG. 1 is a block diagram of a one-can, two-circuit type hot-water bath kettle according to an embodiment of the present invention. FIG. 2 is a flowchart of the present invention. (1) …… Can body (1a) …… Hot water side can body (1b) …… Bath side can body (2) …… Fin (23) …… Switching servo valve (24) …… Bath temperature sensor (26) …… Bath side hot water temperature sensor (27) …… Circulation amount control circuit (28) …… Bath bypass waterway

Claims (1)

[Scope of utility model registration request] 1. A hot water supply side can body and a bath side can body share fins, wherein a hot water supply side temperature sensor, a hot water supply side can body discharge temperature sensor, a hot water supply amount sensor, and a bath side bath A bath temperature sensor that detects the return hot water temperature, a bath-side hot water temperature sensor, a water amount sensor, and a bath bypass waterway that connects the bath hot water entrance and exit and the bath hot water And a switching servo valve for adjusting the flow rate of the hot water, the hot water supply based on the temperature obtained from the water temperature sensor and the hot water supply side can body hot water temperature sensor and the hot water supply side water amount obtained from the hot water supply water amount sensor. Based on the temperature obtained from the bath temperature sensor and the bath side tap water temperature sensor, the heat absorption amount of the side can body is calculated so that the heat absorption amount of the bath side can body becomes equal to the heat absorption amount of the hot water supply side can body. Calculate the amount of water on the side, and the amount of water on the bath will be the calculated amount 1 can 2 circuit type water heater bathtub, characterized in that a circulation quantity control device for controlling the opening degree of the switching servo valve.