| 摘要 |
PROBLEM TO BE SOLVED: To provide comfortable heating and cooling by preventing the return of liquid to a compressor and superheating caused by the excess or shortage state of a refrigerant being generated from the difference in the amount of required refrigerant of each operation mode of a heat storage type heating- cooling combination appliance, avoiding the risk for damaging the compressor, and at the same time controlling a refrigeration cycle to an optimum state. SOLUTION: One end of a receiver 15 that is provided at a chill storage bath 17 is connected to the inside of a chamber by a main liquid pipe flow control valve 13 via an on/off valve 25, and the other end is connected to a low-pressure gas pipe 12 that is connected to the suction side of the compressor via an on/off valve 26, thus avoiding risk for damaging the compressor and at the same time obtaining comfortable cooling or heating operation with an inexpensive configuration.
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