Patent ID: 8020394
Filing Date: 2011-09-20
Classification: F25B,Y02B

Abstract:
1. An air conditioner comprising: an outdoor unit having an outdoor heat exchanger for heat exchange between outdoor air and a refrigerant, and a compressor for compressing the refrigerant; at least one indoor unit, each indoor unit having an indoor heat exchanger for heat exchange between indoor air and the refrigerant; at least one refrigerant pipe, each refrigerant pipe corresponding to a single indoor heat exchanger of an indoor unit, and connecting the outdoor heat exchanger to the corresponding indoor heat exchanger; an expansion valve provided on each refrigerant pipe for the expansion of the refrigerant; a temperature sensor provided on each refrigerant pipe; a pressure sensor provided at the compressor; and a control device configured to: wherein, when the oil recovery operation mode is selected, the control device operates the air conditioner to recover oil into the compressor, changing the operation capacity of the compressor.