JPH04236054A - Hot water heater - Google Patents

Abstract

PURPOSE:To provide the title heater of one-boiler and two-water path type, which can be simultaneously used as additional-heating for a bath and heating for hot-water supply, in a hot water-supplying machine used for a domestic hot-water supply type bath or the like. CONSTITUTION:The title machine is composed so that a heat-exchanger 1 for which a heat-transfer pipe 3 for hot-water supply and a heat-transfer pipe 2 for a bath, which have heat-absorbing fins 16 for common use, are mounted above a combustion burner 9, is provided, and in a controller 14, the combustion burner 9 and a circulation pump 4 are controlled by a signal from a thermister 7 and setting of a remote-control device 15. During a hot water-supplying operation, when an additional-heating operation for the bath is turned on with the remote-control device 15, the circulation pump 4 is started, and water in the bath is circulated and is heated. At this time, when a temperature detected by a thermister 7 for the hot-water supply does not reach a preset temperature on the remote-control device, the operation of the circulation pump 4 is stopped.

Description

[Detailed description of the invention]

0001

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

0002

[Prior Art] In general, when a hot water bath pot with a shared combustion burner, in which the combustion amount can be varied by a one-can two-channel heat exchanger that shares heat-absorbing fins, is used at the same time for reheating the bath and heating the hot water, Because the bath reheating and hot water supply temperature cannot be controlled, resulting in an unstable state, the bath reheating is stopped under any conditions when hot water is being used, as shown in the sequence in Figure 3. .

0003

[Problem to be Solved by the Invention] In a hot water bath boiler having a common combustion burner in which the combustion amount can be varied by a one-can, two-channel heat exchanger that shares heat-absorbing fins, the above-mentioned hot water supply use is possible. However, the problem with the control for stopping reheating of baths was that it was not possible to use reheating of baths and hot water heating at the same time.

[0004] The present invention has been made to solve the problems of the prior art, and an object thereof is to provide a one-can, two-channel water heater that can be used for reheating a bath and heating hot water at the same time.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a heat exchanger tube for hot water supply, and a heat exchanger tube for bath use in which the heat exchanger tube and heat absorption fins are shared and a circulation circuit is formed via a circulation pump. In a heat exchanger equipped with a heat transfer tube and a combustion burner that can vary the amount of combustion and is shared by the heat transfer tube for hot water supply and the heat transfer tube for hot water supply, when reheating a bath and simultaneously using hot water heating, the hot water outlet It is equipped with a control device that stops the circulation pump when the temperature detected by the hot water temperature detector installed on the side does not reach the set temperature on the remote control.

[0006]

[Function] According to the above-mentioned structure, even if the bath reheating operation is performed when hot water is being used, if the hot water supply temperature does not reach the set temperature of the remote control, the hot water heating operation will be started without stopping the bath reheating operation. It is possible to use the bath and reheat it at the same time.

[0007]

Embodiments An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows an example of the configuration of the present invention.

A heat exchanger 1 is provided above the combustion burner 9 and is equipped with a hot water supply heat transfer tube 3 and a bath heat transfer tube 2 that share heat absorption fins 16. Hot water and bath water 8 are heated. A hot water supply thermistor 7 is provided on the exit side of the hot water supply heat transfer pipe 3 to detect the temperature of hot water. The bath circulation circuit 10 constitutes a circuit that circulates and heats the bathtub 8 using the circulation pump 4. The control unit 14 includes a bath hot water temperature thermistor 5,
It consists of a detection comparison section 11 that compares the signals from the bath water temperature thermistor 6 and the hot water supply thermistor 7, a combustion control section 12, and a drive section 13. The signal from the hot water supply thermistor 7 and the setting of the remote control 15 are used to control the circulation with the combustion burner 9. The pump 4 is controlled.

The operation of the above configuration will be explained based on the sequence shown in FIG. During the hot water supply operation, if the bath reheating operation is turned on in the bath using the remote control 15, the circulation pump 4 is operated, the bathtub water 8 is circulated, and the bathtub water 8 is heated. At this time, since hot water supply heating operation and bath reheating operation are performed simultaneously, the combustion amount of the combustion burner is adjusted. Even after adjusting the combustion amount, if the temperature of the hot water thermistor 7, which detects the hot water supply temperature, does not reach the set temperature of the remote controller 15 and is below the set temperature (the reasons for not reaching the set temperature are insufficient capacity, hot water supply temperature, etc.). (There is a large difference between the water temperature and the bathtub water temperature, etc.) The circulation pump 4 stops and operates only to heat the hot water. Moreover, in cases other than the above-mentioned case where the temperature is below the set temperature, the simultaneous operation of hot water supply heating operation and bath reheating operation is continued.

0010

[Effects of the Invention] As described above, the present invention provides a heat exchanger tube for hot water supply,
In a heat exchanger equipped with a bath heat transfer tube that shares the hot water supply heat transfer tube and heat absorption fins and forms a circulation circuit with the bathtub via a circulation pump, and a combustion burner whose combustion amount is variable, A control device is installed that stops the circulation pump when the temperature detected by a hot water temperature detector such as a hot water thermistor installed on the hot water outlet side does not reach the set temperature on the remote control when reheating and hot water heating are used simultaneously. Because of the configuration, even if bath reheating is performed during hot water heating operation, as long as the hot water supply temperature does not reach the temperature set on the remote control, the bath reheating operation will not be stopped and hot water heating and bath reheating will continue. can be used simultaneously.

[Brief explanation of the drawing]

[Fig. 1] A configuration diagram showing an embodiment of the present invention.

[Fig. 2] Sequence diagram of the embodiment of the present invention

[Figure 3] Sequence diagram of conventional example

[Explanation of symbols]

1 Heat exchanger 2 Bath heat exchanger tube 3 Heat exchanger tube for hot water supply 4 Circulation pump 7 Hot water thermistor 8 Bathtub water 9 Combustion burner 10 Bath circulation circuit 14 Control section 15 Remote control

Claims (1)

[Claims] Claim 1: A heat exchanger equipped with a hot water supply heat exchanger tube, a bath heat exchanger tube that shares the hot water supply heat exchanger tube and heat absorption fins, and forms a circulation circuit with the bathtub via a circulation pump; For those with a variable combustion burner, when the temperature detected by the hot water temperature detector installed on the hot water outlet side does not reach the set temperature on the remote control when reheating the bath and heating hot water at the same time, the circulation pump is activated. A water heater characterized by being equipped with a control device that stops the water heater.