| 摘要 |
A refrigeration cycle has high-pressure and low-pressure refrigerant sides and causes at least a variable-capacity compressor and an outdoor heat exchanger, both of which are arranged outside the room to be air-conditioned, to communicate with an indoor heat exchanger arranged inside the room. The refrigeration cycle is operated in a heating operation mode. An inverter generates an output having a predetermined operating frequency to be supplied to the variable-capacity compressor. A fan commonly supplies an air flow to the outdoor heat exchanger and the inverter. A detector detects a signal corresponding to the pressure of the high-pressure refrigerant in the refrigeration cycle. A first control section provides a command for causing the inverter to gradually decrease the predetermined operating frequency when a detection signal from the detector exceeds a predetermined value. A second control section monitors a decrease in the predetermined operating frequency in the inverter due to the first control section, and provides a stop command to the fan when the predetermined operating frequency is decreased to a predetermined value or less.
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