Patent ID: 8033123
Filing Date: 2011-10-11
Classification: F25B

Abstract:
1. An air conditioner comprising: a refrigerant circuit including a compressor, a heat source side heat exchanger, an expansion mechanism, and a utilization side heat exchanger interconnected together; a refrigerant quantity calculating section configured to calculate a refrigerant quantity in the refrigerant circuit taking into account a dissolved refrigerant quantity that is the quantity of refrigerant dissolved in the refrigerating machine oil in the compressor, based on an operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit; and a refrigerant quantity judging section configured to judge adequacy of the refrigerant quantity in the refrigerant circuit based on the refrigerant quantity calculated by the refrigerant quantity calculating section, the refrigerant quantity calculating section being further configured to calculate the dissolved refrigerant quantity based on operation state quantities that at least include ambient temperature outside the compressor or an operation state quantity equivalent to temperature, the operation state quantities used for calculating the dissolved refrigerant quantity further including temperature of the refrigerant in contact with the refrigerating machine oil in the compressor or an operation state quantity equivalent to the temperature, and the operation state quantities used for calculating the dissolved refrigerant quantity further including a period of time from a start/stop of the compressor.