| 摘要 |
PROBLEM TO BE SOLVED: To control an amount of refrigerant to a suitable refrigerant amount after a refrigeration cycle becomes securely stable.SOLUTION: Once air-conditioning operation is started, a control device 20 monitors a discharge temperature of a refrigerant discharged from a compressor 1. The control device 20 determines whether a discharge temperature becomes stable based upon variation in discharge temperature from the start of the air-conditioning operation. When the variation in discharge temperature becomes small, it is considered that the discharge temperature becomes stable and a refrigeration cycle becomes stable. The control device 20 controls the amount of the circulating refrigerant by controlling high pressure-side and low pressure-side flow control devices 6, 7 so that the amount of the circulating refrigerants reaches a suitable refrigerant amount. |
