JPH023081Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention mainly relates to an operating power supply device for a gas instantaneous water heater.

(Prior Art) Conventionally, this type of water heater has a direct current low voltage generation source consisting of a transformer and a rectifier circuit on the output side of the water heater, which houses a heat exchanger and a gas burner for heating the water heater. Types that include an electromagnetic safety valve and other electrical appliances connected to the valve, and a control board having a control circuit on the input side thereof are known.

(Problem to be solved by the invention) However, in this case, the generation source is generally housed in the main body, and in such a case, the main body as a whole is relatively It is large and comes with some disadvantages.

(Means for Solving the Problems) The purpose of the present invention is to provide a device that does not have such inconveniences, that is, a device whose main body is relatively compact. A control system that has an electromagnetic safety valve and other electric appliances connected to a direct current low voltage source consisting of a transformer and a rectifier circuit on its output side, and a control circuit on its input side, inside the water heater body that houses a gas burner and a rectifier circuit on its output side. An AC adapter that can be plugged into an AC 100V outlet provided on the wall in the kitchen or elsewhere is provided on the outside of the main body, and the source is housed in the AC adapter. At the same time, the generation source is connected to the plug on the input side of the transformer, and to the input terminal of the control board in the main body in a conductor connected to the output side of the rectifier circuit and led out from the adapter. It consists of

(Example) An example of implementing the present invention will be explained with reference to attached drawings.

In the drawings, reference numeral 1 indicates a water heater main body, and the main body 1 is installed approximately along the lower surface of a hanging cabinet 3 on the ceiling surface in a kitchen or other room 2, as shown in FIG. 1, for example. Inside, as clearly shown in FIG. 2, for example, there is a horizontal structure in which a heat exchanger 4, a gas burner 5 that heats the heat exchanger 4, and a combustion fan 6 that forcibly guides combustion air to the heat exchanger 4 are sequentially connected. A control board that accommodates a longitudinally elongated heat exchanger unit 7, and has an electromagnetic safety valve 9 and other electrical appliances connected to a DC low voltage generation source 8, which will be described later, on its side, and a control circuit 10 on its input side. 11. The main body 1 further includes a water passage 12 connected to the heat exchanger 4 and a water governor 13 interposed therein, and a gas passage 14 connected to the gas burner 5 and interposed therein. The electromagnetic safety valve 9 is located upstream of the gas governor 15 and inserted into the gas passage 14.

The above is not particularly different from the conventional one, and the generation source 8 is composed of a transformer 8a and a rectifier circuit 8b on the output side thereof, and this point is also not particularly different from the conventional one.

According to the present invention, an AC adapter 19 which can be freely inserted into an AC 100V outlet 17 prepared on a wall surface 16 in the kitchen or other places is provided on the outside of the main body 1, and the AC adapter 19 can be connected to the above-mentioned generation sources. 8, and the source 8 is connected to the plug 18 and the rectifier circuit 8b on the input side of the transformer 8a.
A conductive wire 20 connected to the output side of the adapter 19 and led out from the adapter 19 is connected to the input terminal 11a of the control board 11 in the main body 1.

To explain further, for example, as shown in the first diagram, the outlet 17 is buried in the lower wall of the chamber 1, and the adapter 19 is inserted into and removed from it.
As clearly shown in FIG. 3, the adapter 19 is, for example, in the form of a frame housing having a plug 18 on the back surface facing the outlet 17, and the conductor 20 is guided downward.

Furthermore, in the illustrated embodiment, an AC 100V outlet 21 is provided on the front surface of the adapter 19, and this can be freely connected to a ventilation fan 23 provided at the upper part of the room 1 via a conductor 22. Operator 25a of the switch 25 that opens and closes the side connection circuit 24
is provided on the lower side of the front surface, and further includes a relay contact 2 interposed in a side path 26 parallel to the connection circuit 24.
7a is prepared in the adapter 19 and is connected to the main body 1 side via a conductor 28, and when a combustion detection element (not shown) on the main body 1 side operates, the relay contact 27a closes. Therefore, the ventilation fan 23 is automatically operated even when the switch 25 is in the open state. Furthermore, the adapter 19 has the aforementioned 100V outlet 21.
Separately, a 100V lead wire 29 is provided and guided to the main body 1 side together with the above-mentioned lead wire 20, so that it can be prepared for the operation of the 100V type member inside the main body 1.

(Function) To explain its operation, when the AC adapter 19 is plugged into the outlet 17, the DC low voltage source 8 inside it is activated, and the electromagnetic safety valve inside the main body 1 is activated. 9 Other electric appliances are prepared for operation and ready for use, and at this time, the generation source 8 is provided outside the main body 1, which allows the main body 1 to be miniaturized and the It is protected from the heat inside the main body 1 and is not damaged by it.

(Effect of the invention) As described above, according to the invention, the DC low voltage source that operates the electromagnetic safety valve and other electric appliances inside the water heater body is connected to an external source separate from the main body.
It is installed inside the AC adapter, which eliminates the inconveniences of conventional systems in which the generation source is installed inside the main body.Furthermore, the adapter is easy to use, as it only needs to be plugged into an outlet on the wall using its plug. It has certain effects.

[Brief explanation of the drawing]

FIG. 1 is a side view of an example of the present device, FIG. 2 is an enlarged cross-sectional view taken along the line -, FIG. 3 is an enlarged perspective view of the adapter portion thereof, and FIG. 4 is a circuit diagram thereof. 1... Water boiler body, 4... Heat exchanger, 5... Gas burner, 8... DC low voltage source, 8a... Transformer, 8b... Rectifier circuit, 9... Electromagnetic safety valve,
10...control circuit, 11...control board,
17...AC 100V outlet, 18...Plug, 19...AC adapter, 20...Conductor, 1
1a...Input terminal.

Claims (1)

[Scope of utility model registration request] Inside the water heater body, which houses a heat exchanger and a gas burner that heats it, there are electromagnetic safety valves and other electrical appliances connected to a DC low voltage source consisting of a transformer and a rectifier circuit on its output side. A control board with a control circuit on the input side is equipped with an AC adapter that can be plugged into an AC 100V outlet provided on the wall in the kitchen or elsewhere via a plug, on the outside of the main body. hand,
The generation source is accommodated in this, and the generation source is connected to the input side of the transformer with a plug, and the conductor connected to the output side of the rectifier circuit and led out from the adapter controls the generation source in the main body. An operating power supply device for a water heater, which is connected to an input terminal of a circuit board.