Patent attributes
An air conditioning machine is provided by which refrigerant collected into an outdoor heat exchanger is suppressed from counter-flowing through a discharge hole of a compressor toward a side of an indoor heat exchanger after the end of a pump down operation. The air conditioning machine includes a refrigerant circuit, a refrigerant leakage sensor that senses leakage of the flammable refrigerant from the refrigerant circuit, and a control unit that carries out a pump down operation for accumulating the flammable refrigerant in the outdoor heat exchanger when the leakage of the flammable refrigerant is sensed. At the end of the pump down operation, the pump down operation control unit controls the compressor so that the compression member stops at a position where the compression member overlaps at least a portion of the discharge hole when viewed in an axial direction of the cylinder chamber.
