Single -cooling air conditioner

The utility model discloses a single -cooling air conditioner, include: double -cylinder compressor, outdoor heat exchanger, indoor heat exchanger, vapour and liquid separator, refrigerant radiator, the induction port and the first reservoir intercommunication of first cylinder, the value range of the exhaust volume ratio of second cylinder and first cylinder is 1%~10%, vapour and liquid separator includes gas outlet, first interface and second interface, and the gas outlet links to each other with the second cylinder, and it has a throttling element of fixed aperture to establish ties between first interface and the outdoor heat exchanger, and it has the 2nd throttling element of aperture adjustable to establish ties between second interface and the indoor heat exchanger. The refrigerant radiator is established ties between a throttling element and first interface, perhaps the refrigerant radiator is established ties between the 2nd throttling element and second interface. The utility model discloses a singl