| 摘要 |
PROBLEM TO BE SOLVED: To prevent a compressor from suctioning a liquid refrigerant upon restart of heating operation even when a heat exchanger using a flat multi-hole tube as a heat transfer tube is employed as an outdoor heat exchanger in an air conditioning device which is switchable between cooling operation and heating operation by a four-way switching valve.SOLUTION: An air conditioning device (1) has a refrigerant circuit (10) to which a compressor (21), a four-way switching valve (22), an outdoor heat exchanger (23), an expansion valve (24) and an indoor heat exchanger (41) are connected. The outdoor heat exchanger (23) is a heat exchanger which uses a flat multi-hole tube as a heat transfer tube (231). When heating operation is stopped, the air conditioning device (1) switches the four-way switching valve (22) from a heating cycle state to a cooling cycle state to stop the compressor (21) and performs control to equalize pressure of the refrigerant circuit (10). |
