Patent ID: 9739521
Date: 2017-08-22
CPC Classifications: F25B,F25D

Claim:
1. An air conditioning apparatus comprising: at least one outdoor unit including: a compressor; a flow path switching valve; an outdoor heat exchanger; outdoor heat exchanger temperature detecting means for detecting a temperature of the outdoor heat exchanger; and sucking superheating degree detecting means for detecting a sucking superheating degree as a superheating degree of a refrigerant sucked into the compressor; a plurality of indoor units having an indoor heat exchanger; a refrigerant circuit in which the at least one outdoor unit and the indoor units are alternately connected by a plurality of refrigerant pipes; and a controller configured to control the air conditioning apparatus such that when both the temperature of the outdoor heat exchanger detected by the outdoor heat exchanger temperature detecting means becomes equal to or higher than a first predetermined temperature and the sucking superheating degree detected by the sucking superheating degree detecting means becomes equal to or lower than a second predetermined temperature while a reverse defrosting operation to thaw frost forming on the outdoor heat exchanger by causing the outdoor heat exchanger to function as a condenser is being performed, the air conditioning apparatus ends the reverse defrosting operation, wherein the air conditioning apparatus ends the reverse defrosting operation when the temperature of the outdoor heat exchanger detected by the outdoor heat exchanger temperature detecting means is equal to or higher than the first predetermined temperature and, concurrently, the sucking superheating degree detected by the sucking superheating degree detecting means is equal to or lower than the second predetermined temperature.