| 摘要 |
PROBLEM TO BE SOLVED: To store heat only through a refrigerant circuit using night power. SOLUTION: A refrigerant low pressure vessel 8 is provided in the passage for carrying refrigerant from an evaporator 4 to a compressor 1, and a refrigerant high pressure vessel 5 is provided in the passage for carrying refrigerant from a condenser 2 to and expansion valve 3. A low pressure side valve 12 is provided near the refrigerant low pressure vessel 8 and a high pressure side valve 11 is provided near the refrigerant high pressure vessel 5. Valves 10, 9 are provided, respectively, on the suction side of the compressor 1 and on the delivery side of the condenser 2 and valves 6, 7 are provided, respectively, on the suction side of the expansion calve 3 and on the delivery side of the evaporator 4. Heat storage operation is started by closing the valves 6, 7, opening the low pressure side valve 12, the valves 9, 10 and the high pressure side valve 11, operating the compressor 1 and the condenser 2, and storing high pressure liquid refrigerant in the vessel 5. Heat radiating operation is started by closing the valves 9, 10, stopping the compressor 1 and the condenser 2, opening the low pressure side valve 12 and the high pressure side valve 11, and supplying liquid refrigerant stored in the vessel 5 to the evaporator 4 for refrigeration and cooling.
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