JP2836262B2 - Water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater using oil or gas as a heat source, which is mainly used for domestic hot water baths.

[0002]

2. Description of the Related Art In general, a single-can, two-channel heat exchanger sharing heat-absorbing fins can vary the amount of combustion. Since the hot water supply and the hot water supply temperature cannot be controlled and the state becomes unstable, when the hot water supply is used as shown in the sequence of FIG. 3, the control for stopping the hot water supply in any state is performed. .

[0003]

SUMMARY OF THE INVENTION In such a hot water supply bath having a common combustion burner in which the amount of combustion can be varied by a one-can, two-channel heat exchanger sharing a heat absorbing fin, the use of hot water as described above is considered. At the time, there is a problem that in the control for stopping the bath reheating, it is not possible to simultaneously use the bath reheating and the hot water heating.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a one-can, two-channel water heater capable of simultaneously using bath reheating and hot water heating.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a hot water supply heat transfer tube, and a bath having a circulation circuit formed through a circulation pump by using the heat transfer tube and the heat absorption fins in common. A heat exchanger equipped with a heat transfer tube, and a combustion burner that can vary the amount of combustion and have a common heat burner for the hot water supply heat transfer tube and the hot water supply heat transfer tube. When the temperature detected by the hot water supply temperature detector provided on the side does not reach the set temperature of the remote controller, a control device for stopping the circulation pump is provided.

[0006]

According to the present invention, when the hot water supply is used and the hot water supply operation does not reach the set temperature of the remote controller, the hot water supply and the hot water supply can be stopped without stopping the hot water supply operation. Simultaneous use of bath reheating is possible.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a configuration example of the present invention.

A heat exchanger 1 is provided above a combustion burner 9 and is provided with a heat transfer tube 3 for hot water supply and a heat transfer tube 2 for bath, which share heat absorbing fins 16. The heat exchanger 1 uses the heat of combustion of the combustion burner 9. Hot water and bathtub water 8 are heated. A hot water supply thermistor 7 for detecting the temperature of hot water supply is provided on the outlet side of the heat transfer pipe 3 for hot water supply. The bath circulation circuit 10 constitutes a circuit for circulating and heating the bathtub 8 by the circulation pump 4. The control unit 14 is provided with a bath hot water temperature thermistor 5,
It comprises a detection comparator 11 for comparing signals from the bath water temperature thermistor 6 and a signal from the hot water supply thermistor 7, a combustion controller 12 and a drive unit 13. The signal from the hot water supply thermistor 7 and the setting of the remote controller 15 circulate with the combustion burner 9. The pump 4 is controlled.

The operation of the above configuration will be described based on the sequence of FIG. During the hot water supply operation, if the bath reheating operation is turned on by the remote controller 15 in the bath, the circulating pump 4 operates to circulate the bathtub water 8 and heat the bathtub water 8.
At this time, since the hot water supply heating operation and the bath reheating are performed simultaneously, the combustion amount of the combustion burner is adjusted. If the temperature of the hot water supply thermistor 7 that detects the hot and cold water supply temperature does not reach the set temperature of the remote controller 15 even if the combustion amount is adjusted, and is lower than or equal to the set temperature (factors that do not reach the set temperature include insufficient capacity and hot water temperature). The circulation pump 4 is stopped, and only the hot water supply heating operation is performed. In addition, when the temperature is not lower than the set temperature as described above, the simultaneous operation of the hot water supply heating operation and the bath reheating is continued.

[0010]

As described above, the present invention provides a heat transfer tube for hot water supply,
A heat exchanger equipped with a bath heat transfer tube that shares the hot water supply heat transfer tube and the heat absorbing fins and forms a bathtub and a circulation circuit via a circulation pump, and a combustion burner with a variable combustion amount, A control device is provided to stop the circulating pump when the temperature detected by the hot water supply temperature detector such as a hot water supply thermistor provided on the hot water supply outlet side does not reach the set temperature of the remote controller at the time of reheating and simultaneous use of hot water supply heating. Due to the configuration, even if the bath water heating operation is performed for the hot water supply heating operation, unless the hot water supply hot water temperature reaches the set temperature of the remote control or lower, the hot water supply heating and the bath water heating will not be stopped without stopping the bath water heating operation. Can be used simultaneously.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a sequence diagram of an embodiment of the present invention.

FIG. 3 is a sequence diagram of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heat exchanger 2 bath heat transfer tube 3 heat transfer tube for hot water supply 4 circulation pump 7 hot water supply thermistor 8 bath water 9 combustion burner 10 bath circulation circuit 14 control unit 15 remote control

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F24H 1/00 604 F24H 1/00 602

Claims (1)

(57) [Claims] The present invention relates to a heat exchanger for hot water supply, a heat exchanger sharing the heat exchanger tube for heat water supply and heat absorbing fins, and having a heat exchanger for bath formed with a bathtub and a circulation circuit through a circulation pump. When the temperature detected by the hot water supply temperature detector provided on the hot water supply outlet side does not reach the set temperature of the remote control at the time of bath reheating and simultaneous use of hot water supply heating in a device having a variable combustion burner, the circulation pump is turned on. A water heater provided with a control device for stopping.