| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent excess accumulation of a refrigerant in a compressor of a part of outdoor units even when the outdoors units in a heating/cooling operation state and in a stop state are mixed in the plurality of outdoor units. <P>SOLUTION: A plurality of indoor units 40a-40d respectively comprise indoor heat exchangers 41a-41d and indoor expansion valves 42a-42d, and the plurality of outdoor units 10a, 10b respectively comprise the compressors 11a, 11b, check valves 12a, 12b, four-way valves 13a, 13b, outdoor heat exchangers 14a, 14b, and outdoor expansion valves 15a, 15b. The plurality of indoor units and the plurality of outdoor units are connected by liquid connection piping 35 and gas connection piping 36, opening/closing mechanisms 16a, 16b are respectively disposed between the four-way valve and a suction side of the compressor, and when at least one of the plurality of outdoor units performs the heating operation, the opening/closing mechanism of the stopped outdoor unit among the remaining outdoor units is closed, and the opening/closing mechanism of the outdoor unit performing a defrosting operation is closed, or its opening is adjusted. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
