REFRIGERANT CHARGING DEVICE, REFRIGERATION DEVICE, AND REFRIGERANT CHARGING METHOD

摘要

Suppression of variation in the charging time of refrigerant into a refrigerant circuit is enabled. A refrigerant charging device includes: an electric valve (49) provided in a supply pipe (47); a flow rate control unit (50) for controlling the degree of opening of the electric valve (49) such that the flow rate in the supply pipe (47) lies within a predetermined range, on the basis of a pressure difference between pressure of refrigerant supplied to the supply pipe (47) and the pressure of refrigerant on the suction side of a compressor (14); an outdoor air temperature sensor (36) for detecting outdoor air temperature; and a low-pressure side pressure sensor (34) for detecting refrigerant pressure on the suction side of the compressor (14). The pressure difference is a difference between a saturation pressure corresponding to the outdoor air temperature detected by the outdoor air temperature sensor (36) and refrigerant pressure detected by the low-pressure side pressure sensor (34).