Patent ID: 7980086
Filing Date: 2011-07-19
Classification: F25B

Abstract:
1. An air conditioner in which the refrigerant is charged using a cylinder containing the refrigerant, the air conditioner comprising: a refrigerant circuit having and 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 charge port being configured to charge the refrigerant into the refrigerant circuit from the cylinder, the charge port being provided between the utilization side heat exchanger and the compressor of the refrigerant circuit; a first temperature sensor being provided in the vicinity of the charge port of the refrigerant circuit between the charge port and the compressor; a charge judging unit being configured to judge whether or not the cylinder is emptied based on a change in at least one of a temperature detected by the first temperature sensor or a superheating degree; and an output unit being configured to output an indication when the charge judging unit judges that the cylinder is emptied, the charge judging unit judging that the cylinder is emptied when a value relating to at least one of a temperature detected by the first temperature sensor or a superheating degree became equal to or greater than a predetermined judgment value.