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).

Abstract: The present disclosure provides a method, apparatus, and system for a centralized microchannel cooling system in precision cooling applications, such as mission-critical systems with data centers or cabinets or rooms with medical equipment. The microchannel condenser is designed to provide sufficient cooling for such applications by configuring multiple microchannel slabs together in a fashion that advantageously can increase the overall cooling abilities of multiple slabs not heretofore known. The system can provide a retrofit condenser for some existing precision cooling systems that have limitations on size, while satisfying cooling capacity requirements. The multiple slabs can be cooled by flowing a fluid such as air or a liquid across them. One or more microchannel slabs can be mounted horizontally, vertically, or in an inclined position. Further, the system can allow for multiple passes of refrigerants through the microchannel slabs.