JPS6018729Y2 - hot water heater - Google Patents

Description

[Detailed description of the invention] This invention relates to improving hot water heaters, improving thermal efficiency,
The purpose is to make the equipment smaller.

If a conventional hot water heater has a one-can type structure, for example, during heating, the combustion amount is small, ranging from a fraction of the amount of gas burned during hot water supply to one W, resulting in an excessive amount of combustion air. , the thermal efficiency was decreasing.

In addition, in the case of a two-can type, for example, a No. 15 hot water heat exchanger and a No.
The container configuration became larger, with heat exchangers of the same size installed side by side, and the price was also high.

The present invention solves the problems of the conventional hot water heaters as described above, and an embodiment thereof will be described below with reference to the drawings.

In the figure, 1 is a heat exchanger for heating, 2 is a heat exchanger for hot water supply,
3 is a heating burner section provided corresponding to the heating heat exchanger 1, and combustion is controlled by sensing the temperature of the hot water outlet pipe 4, etc. and turning on/off the heating gas valve 5. It is something.

Reference numeral 6 denotes a hot water supply burner section provided corresponding to the hot water supply heat exchanger 2, and its gas combustion is controlled by a hot water supply gas valve 8 that opens and closes in conjunction with the operation of the hot water supply water valve.

The hot water supply water valve 7 connects the city water supply port 9 to the high pressure conduit 10.
, a low-pressure conduit 12 is separately provided from the tap water outlet 11, and when water is flowing, the differential pressure is sensed and activated, and the valve part 15 is moved to one valve seat while resisting the elasticity of the spring 14 via the operating rod 13. 16.

Further, this valve 7 does not operate when the water flow is stopped, so that the repulsive force of the spring 14 presses the valve portion 15 against the other valve seat 17.

The figure shows the state of the valve when water is flowing.

In addition, in the figure, 18 is a circulation pump, 19 is a heating radiator,
20 is an indirect cylinder provided in the heating bypass path 21.

Further, 22 is a three-way valve body associated with the water valve 7, which includes a hot water supply port 23, a hot water supply outlet 24, and a hot water supply return port 25.
and a heating outlet 26.

Reference numeral 27 denotes an O-ring, which is installed in the O-ring groove 28 to keep this part watertight even when the operating rod 13 is in operation.

According to the above configuration, since the hot water supply water valve 7 does not operate when only heating is used, the valve portion 15 is brought into pressure contact with one of the valve seats 17, so that the circulating water flows from the valve seat 16 to the heating outlet 26. Only the heat exchanger 1 for street heating is circulated.

In addition, when using hot water supply, the hot water supply water valve 7 moves the valve part 15 to the valve seat 1.
6, the circulating water flows from the valve seat 17 to the hot water supply outlet 24, the hot water heat exchanger 2, the hot water return port 25, the heating outlet 26, and the heating heat exchanger 1. It flows through the exchanger and undergoes heat exchange with the water supplied by the indirect cylinder 20.

As detailed above, in this invention, the heat exchangers that were used individually in the conventional two-can system can be used simultaneously when hot water is supplied.
As a heat exchanger for hot water supply, the capacity can be reduced, and the price can therefore be reduced.

Moreover, it is extremely valuable as it does not reduce the thermal efficiency as a heat exchanger for heating.

Note that the indirect cylinder may be a double heat exchanger, and the three-way valve 22 is not only linked to the hot water supply water valve 7, but can also be operated manually if an operating cock 29 is provided. .

[Brief explanation of the drawing]

The figure shows a circuit configuration of a hot water circulating section of a hot water heater in an embodiment of the present invention. 1... Heat exchanger for heating, 2... Heat exchanger for hot water supply, 3, 6... Burner section, 7...
・Water valve for hot water supply, 20... Indirect cylinder, 22... Three-way valve body, 23...
・Hot water inlet, 24... Hot water supply outlet, 25...
... Return port for hot water supply, 26 ... Output port for heating.

Claims (1)

[Scope of utility model registration request] It has a plurality of heat exchangers, a burner section corresponding to each heat exchanger, a hot water supply water valve and a three-way valve body that operate when hot water is supplied,
The three-way valve body has a hot water inlet communicating with the one heat exchanger, a hot water supply outlet communicating with the hot water inlet and leading to the other heat exchanger, and a hot water return port leading from the other heat exchanger. and a heating outlet that allows the flow to flow to one of the heat exchangers, and a first valve seat part is provided inside the passage leading from the hot water inlet to the hot water return port and the heating outlet; A second valve seat part is provided in the passage leading to the hot water supply, and a valve part that responds to the operation of the hot water supply water valve is provided, and this valve part closes only the first valve seat part when hot water is being supplied, and closes the second valve seat part when hot water is not being supplied. A hot water heater that closes a valve seat and burns a burner corresponding to a heat exchanger that circulates hot water.