| 摘要 |
PURPOSE: A heating control method of a heater pump-type multiple air conditioner is provided to prevent the lack of refrigerant and to increase the heating performance of an indoor device that is driven by recovering liquid refrigerant remaining in a heat exchanger of the stopping indoor device by opening an electronic expansion valve of the indoor device that stops. CONSTITUTION: A heating control method of a heater pump-type multiple air conditioner is composed of steps for detecting operation states of plural indoor devices(S1) and for opening an electronic expansion valve of the indoor device that stops if some of the indoor devices stop and the rest of the indoor devices are under a heating operation(S2,S3). In the electronic expansion valve opening step, the maximum opening degree of the electronic expansion valve of the stopping indoor device is within 1/10¯1/5.
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