| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner, satisfying the pressure use limit of a refrigerant compressor even in a wide range of temperature conditions to perform stable cooling and heating operation. SOLUTION: In this air conditioner, the refrigerant compressor 2, a four-way switching valve 3, an outdoor heat exchanger 4, an expansion valve 5 and an indoor heat exchanger 6 are sequentially connected to each other by a refrigerant pipe 7 to construct a heat pump cycle 8 capable of performing cooling and heating operation. The air conditioner 1 includes a control part 10 for controlling the opening of an expansion valve 5 so that a difference between a discharge pipe temperature of the refrigerant compressor 2 and the outdoor heat exchanger temperature in cooling, and a difference between the discharge pipe temperature of the refrigerant compressor 2 and the indoor heat exchanger temperature in heating are respectively within a target range. The control part 10 is provided with an outside air temperature lowest opening setting means 20 for setting the lowest opening of the expansion valve 5 to the outside air temperature. COPYRIGHT: (C)2008,JPO&INPIT
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