JPS5849006Y2 - Hot water supply and cooling equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hot water supply and cooling system, and more specifically, it effectively utilizes the waste heat released by the outdoor heat exchanger during cooling operation to supply hot water, and also when cooling operation is stopped. It is possible to supply hot water.

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is a refrigerant compressor, 2 is a water inlet 3 and a hot water outlet 4
6 is a receiver tank, 7 is a pressure reducing device for hot water supply to which the first solenoid valve 8 is connected in parallel, and 9 is a room equipped with an outdoor blower 10. An outside heat exchanger, 11 a cooling pressure reducing device, and 12 an indoor heat exchanger equipped with an indoor blower 13 are connected in series.

14 is a bypass circuit provided in parallel with the indoor heat exchanger 12, and has a second solenoid valve 15.

And the first. The second solenoid valves 8, 15, compressor 1, and blower 10.13 are controlled by a control circuit shown in FIG.

16 is an operation switch; 17, 18, and 19 are cooling/hot water switching switches that are switched in conjunction with each other; FMI is a motor for the indoor blower 13; FMO is a motor for the outdoor blower 10;
R1 is the auxiliary relay, and ■1 is the normally closed contact R1 of the relay R1.
□ is the coil for the first solenoid valve 8 which is connected in series, ■2 is the coil for the second solenoid valve 15 which is connected in series with the normally open contact R12 of the relay R1, CM is the motor for the compressor 1, and 20 is the hot water supply This hot water switch closes the high temperature side contact 20a when the water temperature in the tank 5 is above a predetermined value, and closes the low temperature side contact 20b when the water temperature is below a predetermined value.

In such a configuration, the operation switch 16 is pressed to perform cooling operation.
, and set the changeover switches 17, 18, and 19 to the cooling side.

Then, the first. Since the second solenoid valves 8 and 15 open and close, the refrigerant does not flow into the bypass pipe 14, but circulates in the order of 1 → 2 → 6 → 8 → 9 → 11 → 12 → 1 as shown by the solid line arrow. Initially, the contact 20a of the hot water switch 20 is open, so the outdoor fan motor FMO is stopped.

Therefore, the gas discharged from the compressor 1 is mainly condensed in the hot water supply heat exchanger 2, and the water in the hot water supply tank 5 is warmed by the waste heat released.

Due to this action, when the water temperature rises and the high-pressure refrigerant pressure increases, the contact point 20a of the hot water switch 20 closes and the outdoor fan motor FMO rotates, so that the high-pressure pressure does not rise too much and the outdoor heat exchanger 9 A predetermined condensing capacity is obtained.

The refrigerant thus condensed is depressurized by a pressure reducing device 11 and evaporated by an indoor heat exchanger 12, thereby performing a cooling action.

Next, to perform hot water supply operation when cooling operation is not being performed, such as in summer or winter, close the operation switch 16 and selector switch 17, 18.1.
9 is the hot water supply side.

Then, the refrigerant flows into the bypass pipe 14, so it circulates in the order of 1 → 2 → 7 → 9 → 15 → 1 as shown by the broken line arrow, with the hot water supply heat exchanger 2 acting as a condenser and the outdoor heat exchanger 9 acting as an evaporator. Therefore, the water in the hot water tank 5 is warmed by the hot water heat exchanger 2.

Due to these actions, the hot water temperature rises and the hot water switch 2
0 contact 20b opens and motor CM.

The FMO is stopped, and the operation of the compressor 1 and blower 10 is stopped.

When the water temperature in the hot water supply tank 20 becomes low, the contact 20b of the hot water switch 20 closes and the hot water supply operation described above is restarted.

In the above embodiment, one hot water switch 20 controls the blower during cooling operation and the hot water supply operation when cooling operation is stopped; however, the hot water switch 20 controls the blower 10 during cooling operation. The present invention is not limited to the switch, but may be controlled by separately providing a pressure switch (not shown) that opens and closes depending on the pressure or temperature of the high-pressure side refrigerant.

Further, the bypass pipe line 14 may be provided as shown by broken lines A and B, and a three-way solenoid valve 21 may be provided in place of the second solenoid valve 15.

Note that the items surrounded by two-dot chain lines indicate the outdoor unit (O) and the indoor unit (I).

The present invention is configured as described above, and it is possible to effectively utilize the waste heat from the outdoor heat exchanger to supply hot water without having to operate or stop the outdoor fan during cooling operation, thereby causing no hindrance to cooling. It has great practical value, such as being able to store heat in the hot water tank even when the air conditioner is not in operation.

[Brief explanation of drawings]

FIG. 1 is a refrigerant circuit diagram of an embodiment of the present invention, and FIG. 2 is an electric control circuit of the same embodiment. 1... Compressor, 2... Heat exchanger for hot water supply, 5... Hot water tank, 7... Pressure reducing device for hot water supply, 8... ...First solenoid valve, 9...Outdoor heat exchanger, 10...Outdoor blower, 11...
...Air conditioning pressure reducing device, 12...Indoor heat exchanger, 14...Bypass pipe line, 15.21...
...Second solenoid valve.

Claims (1)

[Scope of utility model registration request] A compressor, a heat exchanger for hot water supply disposed in the hot water tank, a pressure reducing device for hot water supply, a parallel circuit of a first solenoid valve that opens during cooling operation and closes during hot water supply operation, an outdoor heat exchanger equipped with an outdoor blower, A cooling pressure reducing device and an indoor heat exchanger are connected in series, and a bypass pipe is provided in parallel with the indoor heat exchanger and cooling pressure reducing device, and no refrigerant is flowed through the bypass pipe during cooling operation. A second solenoid valve is provided to flow the refrigerant during the hot water supply operation, and the outdoor side blower is stopped and operated when the temperature and pressure of the high pressure refrigerant during the cooling operation or the water temperature of the hot water tank is high and low, respectively, and when the hot water supply tank is operated during the hot water supply operation, the outdoor blower is stopped and operated. The hot water supply and cooling system is configured to stop and operate the compressor and outdoor fan when the water temperature is high or low, respectively.