JPH042362Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a water heater equipped with a bath water reheating circulation system.

[Prior Art] In recent years, water heaters have been remotely controlled using a remote control installed in the kitchen of a general household to supply hot water to a bathroom or circulate hot water in a bathtub to the water heater for reheating. A hot water system has been developed.

Such a water heater is equipped with a hot water supply piping mechanism that supplies water from a tap or the like to a heat exchanger of a combustion machine to heat it up, and then supplies the heated hot water into a bathtub. As the reheating piping mechanism, one can be considered that has a configuration in which hot water in the bathtub is circulated through the heat exchanger of the combustor via a water flow detection switch and a circulation pump to reheat the bathtub. The mechanism can be controlled remotely using a remote control.

[Problems to be solved by the invention] However, in the above-mentioned water heaters, especially in the bath water circulation reheating system, for example, when the circulation pump is stopped, the circulation flow path, or the circulation opening facing into the bathtub is exposed to limescale. If the filter installed to prevent water from entering the circulation flow path remains clogged with dirt, that is, the bath water is not circulating, but the water flow detection switch remains ON and does not turn OFF. If the water flow detection switch itself is malfunctioning, the combustor will continue to operate even though the bath water is not circulating, causing the combustor's heat exchanger to overheat and cause a malfunction. This can cause the heat exchanger to overheat.

Another problem was that malfunctions in the water flow detection switch could not be discovered until a serious accident such as dry firing occurred.

This idea was developed based on the above circumstances, and its purpose is to quickly detect abnormalities that occur in the hot water reheating circulation system and automatically control the operation of the combustor. An object of the present invention is to provide a water heater that can reliably prevent abnormal combustion in a combustor and dry heating in a heat exchanger.

[Means for Solving the Problems] In order to solve the above-mentioned problems, this invention has a hot water supply piping mechanism that supplies water to the heat exchanger of the combustor and heats the hot water into the bathtub. , a reheating piping mechanism for circulating hot water in the bathtub through a heat exchanger of the combustor via a water flow detection switch and a circulation pump to reheat the bath; The water heater is capable of being remotely controlled, and the combustor is automatically driven by promptly detecting a normal state or an abnormal state of the reheating piping mechanism based on mutual operating states of the water flow detection switch and the circulation pump. This configuration includes a protective mechanism for controlling the air conditioner.

[Function] In other words, this invention has the above-described configuration, detects the operating state of the water flow detection switch and the operating state of the circulation pump, and determines whether the reheating piping mechanism is normal based on these mutual operating states. Or, because it detects an abnormality and automatically controls the operation of the combustor, even if the water flow detection switch is out of order, it reliably prevents abnormal combustion in the combustor and dry firing due to abnormal heating in the heat exchanger. It is possible to do so.

Furthermore, since the combustion machine is stopped immediately upon detecting an abnormality, it is possible to prevent the heat exchanger from receiving unnecessary (abnormal) heating.

[Example] Hereinafter, this invention will be explained in detail with reference to an illustrated example.

FIG. 1 is a circuit diagram schematically showing a hot water supply system for a bathroom equipped with a water heater according to this invention.
In the figure, 1 is the main body of the water heater. In this water heater main body 1, water C and W from a water supply etc. are supplied to a heat exchanger 4 of a combustor 3 that burns kerosene F supplied from a kerosene tank 2 as fuel.
Hot water H/W heated and heated by the heat exchanger 4
A hot water supply piping mechanism 5 supplies hot water into the bathtub A, and hot water in the bathtub A, that is, bath water H/W, is supplied to the heat exchanger 4 of the combustor 3 via circulation ports 6 and 7 facing the bathtub A. It is composed of a reheating piping mechanism 8 that circulates through and reheats the bathtub, and a filter 9 is provided at the circulation ports 6 and 7 facing into the bathtub A.

In the circulation flow path 10 on the return hot water circulation port 6 side of the reheating piping mechanism 8, there is a water flow detection switch 11 on the upstream side that detects the normal flow of hot water H/W in the bathtub A when it is in the ON state. Further, circulation pumps 12 for forcibly circulating the hot water H and W in the bathtub A are installed on the downstream side, and as shown in FIG. The normal state or abnormal state of the reheating piping mechanism 8 is determined based on the operating state, and the normal state or abnormal state of the reheating piping mechanism 8 is determined by installing the reheating piping mechanism 8 in a kitchen or the like away from the bathroom. The hot water supply piping mechanism 5 and the reheating piping mechanism 8 are displayed on an indicator 14 of a remote control 13 that remotely controls the hot water supply piping mechanism 5 and reheating piping mechanism 8, and a protection mechanism is configured to automatically drive and control the combustion machine 3.

Note that this invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without changing the gist of this invention.

[Effects of the invention] As is clear from the above description, according to this invention, there is provided a hot water supply piping mechanism that supplies water to a heat exchanger of a combustor and heated and heated water into a bathtub; and a reheating piping mechanism that reheats the hot water by circulating it through the heat exchanger of the combustor via a water flow detection switch and a circulation pump, and enables remote control of the hot water supply piping mechanism and the reheating piping mechanism. The water heater is provided with a protection mechanism that detects a normal state or an abnormal state of the reheating piping mechanism based on the mutual operating states of the water flow detection switch and the circulation pump, and automatically controls the drive of the combustor. Therefore, it is possible to quickly detect abnormal operating conditions of the circulation pump due to dirt clogging in the circulation channel or filter, and abnormal conditions such as circulation pump failure.Furthermore, it is possible to detect failures of the water flow detection switch itself. be able to.

In addition, since the operation of the combustor is stopped immediately when an abnormality is detected, even if the water flow detection switch is malfunctioning, dry firing due to abnormal combustion of the combustor or abnormal heating of the heat exchanger can be prevented. This has the excellent effect of being able to reliably prevent the heat exchanger from receiving unnecessary (abnormal) heating.

[Brief explanation of drawings]

Fig. 1 is a circuit configuration diagram schematically showing an embodiment in which the water heater according to this invention is applied to a hot water supply system for a bathroom, and Fig. 2 is a schematic explanatory diagram of a protection mechanism installed in the reheating piping mechanism. It is. 1... Water heater main body, 3... Burner, 4... Heat exchanger, 5... Hot water supply piping mechanism, 6, 7... Circulation port, 8... Reheating piping mechanism, 10... Circulation flow path, 11... Water flow detection switch, 12... Circulation pump, 13... Remote control, 14... Indicator, A... Bathtub, CW... Water, HW... Bath water.

Claims (1)

[Scope of utility model registration request] a hot water supply piping mechanism that supplies water to a heat exchanger of the combustion machine and heats and raises the temperature of the hot water into a bathtub; and a hot water supply piping mechanism that supplies hot water that has been heated and heated to a heat exchanger of the combustion machine into the bathtub; and a hot water supply system that supplies hot water in the bathtub to the heat exchanger of the combustion machine via a water flow detection switch and a circulation pump In addition to being equipped with a reheating piping mechanism that circulates through and reheats,
The hot water supply system is capable of remotely controlling the hot water piping mechanism and the reheating piping mechanism, and detects the normal state or abnormal state of the reheating piping mechanism based on the mutual operating states of the water flow detection switch and the circulation pump, A water heater characterized in that a protection mechanism is provided to automatically drive and control the combustion machine.