| 摘要 |
Disclosed herein is a control method for a multiple heat pump. In the control method, when one of multiple indoor units (4) operates in the heating mode and the other indoor units (1, 2 and 3) shut down, electronic expansion valves (15, 16 and 17) of the shutdown indoor units (1, 2 and 3) are controlled to have an opening degree (X 1 ) higher than a standard opening degree (X 0 ) if an outlet temperature of compressors (22) is higher than a preset temperature, so as to permit a liquid refrigerant, remaining in the shutdown indoor units (1, 2 and 3), to be more readily recovered to the compressors. This eliminates a refrigerant shortage phenomenon of the compressors (22) and prevents deterioration of heating performance as well as reduction of life-span of the compressors (22).
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