Abstract: An air conditioner is disclosed. The compressor has an entrance coupled to an exit of the evaporator via the first ON/OFF valve; and an exit coupled to an entrance of the condenser via the first flow-direction valve. The liquid pump has an entrance coupled to an exit of the liquid accumulator via the second ON/OFF valve; and an exit coupled to an entrance of the throttling device via the second flow-direction valve. An exit of the condenser is coupled to an entrance of the liquid accumulator; an exit of the throttling device is coupled to an entrance of the evaporator. The compressor's bypass pipe has an entrance coupled to an exit of the evaporator; and an exit coupled to an entrance of the condenser. The liquid pump's bypass pipe has an entrance coupled to an exit of the liquid accumulator; an exit coupled to an entrance of the throttling device.

Abstract: An air conditioner includes an evaporator (9), a condenser (14), a compressor (11), a liquid pump (3), a liquid accumulator (1), a first ON/OFF control valve element (10), a first valve element for flow direction control (12), a second ON/OFF control valve element (2), a second valve element for flow direction control (5), a throttling device (8), a liquid pump's bypass pipe (16) with a third valve element for flow direction control (6) and a compressor's bypass pipe (18) with a forth valve element for flow direction control (13). An entrance of the compressor (11) is coupled to an exit of the evaporator (9) via the first ON/OFF control valve element (10); an exit of the compressor (11) is coupled to an entrance of the condenser (14) via the first valve element for flow direction control (12).