Patent ID: 7997093
Filing Date: 2011-08-16
Classification: F25B

Abstract:
1. An air conditioner that adjusts the temperature in a target space, comprising: a refrigerant circuit being configured by the interconnection of a compressor, a heat source side heat exchanger, a utilization side expansion valve, and a utilization side heat exchanger; a temperature adjustment controller being configured to adjust the temperature such that the target space temperature satisfies a predetermined criterion temperature condition; and a refrigerant quantity judging device being configured to judge a refrigerant quantity in the refrigerant circuit based on at least one value of operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit, the refrigerant quantity judging device judging the refrigerant quantity in a state in which the target space temperature satisfies the predetermined criterion temperature condition, and when judging the refrigerant quantity while performing a cooling operation to lower the target space temperature, the temperature adjustment controller performing a heating operation to raise the target space temperature based on a judgment that the predetermined criterion temperature condition has not been satisfied.