To securely collect a refrigerant and refrigerating machine oil in the refrigerant channel of a lower indoor machine into an outdoor machine in the case of pump- down operation.

In the air-conditioner with a heat pump type refrigeration circuit, a refrigerant being discharged from the discharge port of a compressor 2 is circulated to the suction port of the compressor through a four-way valve 3, a first three-way valve 5, a first indoor heat exchanger 6, a first two-way valve 7, a first electronic expansion valve 8, an outdoor heat exchanger 9, and the four-way valve, at the same time the refrigerant being discharge from the compressor is branched and is circulated to the outdoor heat exchanger through a first solenoid switching valve 11, a second three-way valve 12, a second indoor heat exchanger 13, a second two-way valve 14, and a second electronic expansion valve 16, further the four-way valve is connected to the first three-way valve and then the first solenoid switching valve is connected to the second three-way valve by a capillary tube 17. In the air-conditioner, the discharge port of the compressor is connected to the four-way valve and the second two-way valve is connected to the second electronic expansion valve by a bypass circuit 18 with a second switching valve 9, a pressure-accumulation container 22, and a third switching valve 23.