| 摘要 |
Provided is a device which can satisfactorily collect a refrigerant to an outdoor unit by a pump down operation even if the volume of an indoor heat exchanger is greater than the volume of an outdoor heat exchanger. This air conditioning device is provided with an outdoor unit (20), an indoor unit (40) which has an indoor heat exchanger (42), and a control unit which executes a pump down operation. The outdoor unit (20) has an accumulator (22) which has a volume (Va), a compressor (24), an outdoor heat exchanger (28), an expansion valve (33), a large-diameter pipe (30), and the like, and such elements are interconnected by refrigerant piping (31). The volume (Vhi) of the indoor heat exchanger (42) is larger than the volume (Vho) of the outdoor heat exchanger (28). The large-diameter pipe (30) is provided so that the volume (Vt) of the large-diameter pipe (30) having a larger diameter than the refrigerant piping (31) satisfies the following relationship: volume (Vt) > volume (Vhi) - volume (Vho) - volume (Va). |
