| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner suppressing deterioration of heating capacity by suppressing radiation from a refrigerant of an outdoor heat exchanger to outside air when an outside air temperature is low during heating operation. SOLUTION: When the the temperature of the outside air is lower than a set temperature during the heating operation, valve closing operation of closing an opening and closing valve 71 is carried out by a control means 75. Consequently, inflow of the refrigerant from an upstream side into the outdoor heat exchanger 14 can be suppressed. And a reverse flow of the refrigerant from a junction 19h side of a bypass passage 19 to an outdoor heat exchanger 14 side is prevented by a check valve 72. Accordingly, deterioration of heating efficiency due to the inflow of the refrigerant into the outdoor heat exchanger 14 during low temperature heating can be suppressed. COPYRIGHT: (C)2006,JPO&NCIPI
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