JPH0224031Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is equipped with a natural circulation type solar water heater and a water heater using gas or oil as the heat source, and the hot water supply source can be arbitrarily switched between the solar water heater and the water heater. The present invention relates to a water heater using solar heat.

Conventionally, in this type of water heater, the hot water supply pipes of both water heaters are connected in parallel to an indoor hot water supply cylinder, and the hot water supply cylinder is provided with a switching operation section, and the hot water supply source is switched using the operation section. Therefore, in the conventional type, piping during construction is troublesome, and furthermore, when used, switching operations are required, which is troublesome.

The present invention is intended to solve these conventional problems, and will be specifically explained below based on an embodiment shown in the drawings.

Reference numeral 1 denotes a solar water heater, and the water heater 1 is a known natural circulation water heater consisting of a heat collector 2 and a hot water storage tank 3 placed above the heat collector 2. 4 is a water supply pipe, and this water supply pipe 4 is connected to a ball tap valve (not shown) in the hot water storage tank 3, and controls the water supply so that the water level in the hot water storage tank 3 is maintained at a constant level. Reference numeral 5 denotes a water heater using gas as a heat source, and in this embodiment, this water heater is constructed of a one-can, two-circuit type bathtub with a water heater. That is 6
is a heat exchanger for hot water supply, 7 is a circulation heat exchanger, 8 is a common gas burner that heats both heat exchangers, 9 is a gas valve that responds to the water supply pressure and is also opened by an operator to be described later. 10 is a bathtub.

Reference numeral 11 denotes a water supply pipe connected to a water pipe, and a water stop valve 12 is interposed therein, which is opened from a remote location by operating a hot water supply operation using an operating device, which will be described later. 13 is a drain plug. Reference numeral 14 denotes a hot water supply system installed indoors. The hot water supply system 14 is connected to a hot water supply pipe 15, and the hot water supply pipes 16 and 17 of both water heaters 1 and 5 are connected to check valves 18 and 19, respectively. Connected through an intermediary. 2
0 is the operating device for the water heater 5, and as shown in Fig. 2, when it is rotated 90 degrees from its original position, the pilot light (not shown) is activated.
If you ignite it and turn it another 90 degrees, it will be in the hot water supply position, open the water stop valve 12 and close the drain valve 13, and then turn it 90 degrees.
It is set to close the water stop valve 12, open the drain valve 13, and open the gas valve 9 when turned 90 degrees.

In the above configuration, hot water can be obtained by opening the hot water tap 14, and when the water heater 5 is not in use, the stop valve 12 is closed, so the hot water in the hot water storage tank 3 is supplied from the hot water outlet pipe 16. Hot water is supplied from the hot water supply line 14 via a pipe 15. In addition, in order to obtain hot water supply from the water heater 5, if the operator 20 is set to the hot water supply position in advance, the opening of the hot water supply ring 14 generates a water flow in the water supply pipe 11, opens the gas valve 9, and hot water comes out. Hot water is supplied from pipe 17 via hot water supply pipe 15 .
At this time, the check valve 18 is closed by the water pressure from the hot water outlet pipe 17, so hot water from the water heater 5 may flow backward from the hot water outlet pipe 16 to the hot water storage tank 3, and hot water is also supplied from the hot water storage tank 3. There is nothing to be done.

Therefore, as explained in the embodiments above, according to the present invention, piping for indoor hot water supply can be done with a single pipe, so piping construction is easy, and furthermore, there is no need to provide a switching operation part on the hot water supply. It is possible to use only an ordinary collar, and the operation is extremely simple.

The stop valve 12 described in the embodiment may be of an electromagnetic valve type, and the water heater may also be of a single function of hot water supply.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
FIG. 2 is an operation story diagram of the water heater. 1... Solar water heater, 5... Water heater, 12
...Water stop valve, 14...Hot water supply ring, 15...Hot water supply pipe, 16...Hot water outlet pipe, 17...Hot water outlet pipe, 18...
Check valve, 19...Check valve.

Claims (1)

[Scope of utility model registration request] The hot water pipe of a natural circulation type solar water heater and a stop valve that is opened from a remote location when the hot water supply operation is operated by an operator are installed in the water channel. Gas or oil is used as the heat source, and the water flow is detected and the heating operation is performed. The hot water supply pipes of the hot water heaters are connected to a common hot water supply pipe, and this hot water supply pipe is connected to an indoor hot water supply system, in which the hot water supply pipes of both water heaters are each provided with a check valve. A solar water heating system that uses solar heat.