JPS62268953A - Hot water supplier with bath boiler - Google Patents

Abstract

PURPOSE:To keep the temperature of hot water in a bathtub constant all the time by enabling the same heat quantity as radiated heat to be continuously supplied to water in the bathtub by a method in which the opening degree of a three-way valve is controlled by a temperature sensor and a control circuit in such a way as to keep the temperature of hot water in the hot water circulating circuit. CONSTITUTION:Water in a bathtub 27 is heated by supply of the heat of hot water from a boiler 1. In this case, a three-way valve 19 is fully opened to a heat exchanger 16, and when the water of the bathtub 27 reaches a given temperature (t), the valve 19 is switched to be fully opened to a bypass circuit 18 by an output circuit 26, and the timer of a timer circuit 24 is actuated. When a given time period T is elapsed, signal from the circuit 24 is transmitted to a sensor circuit 23 and an arithmetic circuit 25, and the temperature t2 of water in the bathtub 27 is further detected and transmitted to the circuit 25. In this case, by the circuit 25, radiated heat quantity is calculated on the basis of time T and temperatures t1 and t2 information, and the opening degree of the value 19 is set up to equalize the radiated heat quantity with heat quantity supplied through the circuit 26. Thereby, distribution of flow rate to the exchanger 16 and the bypass circuit 18 is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water heater with a bath kettle for home use.

BACKGROUND OF THE INVENTION As shown in FIG. 3, a conventional water heater with a bathtub includes a water heater 3 having a burner 1 and a specimen 2, a circulation pump 4 for circulating water in a bathtub 10, and a temperature detector 5. It was equipped with a hot water circulation circuit 6 and a control circuit 9 having a detection circuit 7 and an output circuit 8.

Problems to be Solved by the Invention In the conventional configuration described above, the water heater 3 detects the water temperature by the temperature detector 5 and the detection circuit 7, and when the water temperature drops to a predetermined water temperature, the circulation pump 4 is started to operate by the output circuit 8. On the other hand, when the water temperature reaches a predetermined value, the circulation pump 4 is stopped by the output circuit 8, and the water temperature in the bathtub 1o connected to the hot water circulation circuit 6 is controlled. However, in such an operation, since the supply of heat to the water in the bathtub 10 is intermittent, as shown in FIG.
The temperature of the water inside was changing over time. And bathtub 10
The temperature of the water inside the bathtub 10 is not directly detected, but instead is detected by the temperature of the water in the hot water circulation circuit 6, so depending on the heat retention status of the bathtub 10 and the difference in season, the temperature inside the bathtub 10 may change as shown by a in Fig. 4. There were times when the temperature change in the water became large.

An object of the present invention is to provide a water heater with a bathtub that solves these problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a hot water circulation circuit that exchanges heat with the hot water inside the housing and transfers the heat to a bathtub, etc., and a hot water circulation circuit that controls the flow of water in this hot water circulation circuit. A control circuit for controlling the
The hot water circulation circuit has a circulation pump, a temperature sensor, a bypass circuit, and a three-way valve whose opening degree can be adjusted, and the control circuit has a detection circuit, a timer circuit, an arithmetic circuit, and an output circuit, and the temperature sensor The water temperature in the hot water circulation circuit is kept constant by adjusting the opening degree of the three-way valve by a control circuit.

For production The effect of this technical means is as follows.

While the circulation pump is constantly operating, the three-way valve is switched so that all the water in the hot water circulation circuit flows to the bypass circuit, and the temperature drop is detected over a certain period of time using a temperature detector, detection circuit, and timer circuit. , the heat dissipation amount of hot water in the bathtub and hot water circulation circuit is calculated by an arithmetic circuit. Thereafter, the opening degree of the three-way valve is set by the output circuit based on the calculated value, and the distribution of the flow rate to the bypass circuit is adjusted according to the amount of heat radiation. As a result, heat equivalent to the amount of heat radiated can be continuously supplied to the water in the bathtub, so that the temperature of the water in the bathtub can always be kept constant.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, reference numeral 11 denotes a water heater, which is composed of a burner 12, a baffle 13, and an electric body 14. 15 is a hot water circulation circuit, which is composed of a heat exchanger 16 installed in the cone 14, a circulation circuit 17, and a bypass circuit 18, and a branch point between the circulation circuit 17 and the bypass circuit 18. A three-way valve 19 with adjustable opening is provided, a circulation pump 20 is provided on the outlet side 17a from the heat exchanger 16 of the circulation circuit 17, and a temperature detection device is provided on the inlet side 17b of the circulation circuit 17 to the heat exchanger 16. A container 21 is provided respectively. 22 is a control circuit, which includes a detection circuit 23 and a timer circuit 2.
The detection circuit 23 is electrically connected to the temperature sensor 21, and the output circuit 26 is electrically connected to the three-way valve 19. 27 is a bathtub connected to the hot water circulation circuit 15.

The operation of the above configuration will be explained next.

The heat generated by the burner 12 is transferred to the electric body 14 with heat exchange promoted by the baffle 13, and the water in the cone 14 is boiled and used for purposes such as hot water supply. On the other hand, the water in the hot water circulation circuit 15 is forcedly circulated between the heat exchanger 16 and the bathtub 27 by the circulation pump 20, and the heat of the hot water in the cone 14 is supplied to the water in the bathtub 27. The water inside is heated. At this time, three-way valve 1
9 is fully opened to the heat exchanger 16 side, but when the water in the bathtub 27 reaches a predetermined temperature t1, the temperature detector 21 and the detection circuit 23 send a signal to the timer circuit 24, the calculation circuit 25, and the output circuit. 26, the output circuit 26 switches the three-way valve 19 to the bypass circuit fully open to the 1st day side, and at the same time, the timer of the timer circuit 24 is started. When the three-way valve 19 is fully open to the bypass circuit 18 side, the heat of the hot water in the cone 14 is not supplied to the water in the bathtub 27, but on the contrary, heat is radiated from the bathtub 27 and the hot water circulation circuit 15 into the bathtub 27. water temperature decreases. Eventually, when a predetermined time T elapses, a signal is sent from the timer circuit 24 to the detection circuit 2.
Furthermore, the water temperature t2 in the bathtub 27 is detected by the detection circuit 23 and the temperature detector 21, and is transmitted to the calculation circuit 25. At this time, the arithmetic circuit 25 calculates the amount of heat radiated from the bathtub 27 and the hot water circulation circuit 15 based on the information on the time T and temperatures t1 and t2, and controls the three-way valve through the output circuit 26 so that the amount of heat radiated and the amount of heat supplied are equal. 19 is set, and the distribution of the flow rate to the heat exchanger 16 side and the bypass circuit 18 side is adjusted.

As a result, the temperature of the water in the bathtub 27 is always kept constant as shown in FIG.

Effects of the Invention As described above, according to the present invention, the opening degree of the three-way valve is adjusted using a temperature sensor and a control circuit to continuously supply heat equal to the amount of heat radiated to the water in the bathtub. Therefore, the temperature of the water in the bathtub can always be kept constant, and since the heat radiation amount is calculated each time by a calculation circuit, the above effects can be obtained regardless of the thermal insulation status of the bathtub or the difference in season. is 0

[Brief explanation of the drawing]

Fig. 1 is a system configuration diagram of a water heater with a bathtub according to an embodiment of the present invention, Fig. 2 is a bathtub water temperature characteristic diagram of a water heater according to an embodiment of the present invention, and Fig. 3 is a diagram of a conventional bathtub. FIG. 4, which is a system configuration diagram of an attached water heater, is a bathtub water temperature characteristic diagram using a conventional water heater. 11... Water heater, 14... Ring body, 15
...Hot water circulation circuit, 18 ...Bypass circuit, 19 ... Three-way valve, 20 ... Circulation pump, 21 ... Temperature detector , 22...
・Control circuit, 23...Detection circuit, 24...
...Timer circuit, 25... Arithmetic circuit, 26.
...output circuit, 27...--bathtub. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Zuginseki

Claims (1)

[Claims] The hot water circulation circuit includes a hot water circulation circuit that exchanges heat with the hot water in the housing and transfers the heat to a bathtub, etc., and a control circuit that controls the flow of water in this hot water circulation circuit, and the hot water circulation circuit includes a circulation pump, a temperature detector, It has a bypass circuit and a three-way valve whose opening can be adjusted, and the control circuit has a detection circuit, a timer circuit, an arithmetic circuit, and an output circuit, and the opening of the three-way valve is adjusted by the temperature sensor and the control circuit. A water heater with a bath pot configured to maintain a constant temperature of water in the hot water circulation circuit.