| 摘要 |
In a refrigerant circuit ( 20 ), a refrigerator circuit ( 110 ) and a freezing circuit ( 30 ) are connected in parallel to an outdoor circuit ( 40 ). In the freezing circuit ( 30 ), a freezer circuit ( 130 ) and a booster circuit ( 140 ) are connected in series. A booster compressor ( 141 ) and a four-way switch valve ( 142 ) are provided in the booster circuit ( 140 ). During the time when a freezer heat exchanger ( 131 ) performs cooling operation for cooling the inside air, refrigerant evaporated in the freezer heat exchanger ( 131 ) is compressed in the booster compressor ( 141 ), and then, is sucked into a variable capacitance compressor ( 41 ). On the other hand, during defrosting of the freezer heat exchanger ( 131 ), the refrigerant evaporated in a refrigerator heat exchanger ( 111 ) is compressed in the booster compressor ( 141 ), and then, is supplied to the freezer heat exchanger ( 131 ). The refrigerant condensed in the freezer heat exchanger ( 131 ) during the defrosting operation is sent back to the refrigerator heat exchanger ( 111 ).
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