Working Principle

Refrigerant with low temperature and low pressure is compressed by the compressor to high temperature and high pressure vapour, then cools in the condenser (This is a forced air cooling process: room air passes condenser surface, absorbs the refrigerant's heat in the condenser by heat exchange, then the room air warms up and the warm air is exhausted through the air exhaust duct,) to become high pressure liquid. The liquid flows through capillary tube to lower its pressure to become low temperature low pressure liquid. After absorbing the heat of air in the surface of evaporator (A forced air cooling process too: room air passes evaporator surface, its heat is absorbed by refrigerant in tube, it cools down and flows into room to lower the room temperature). The low temperature low pressure liquid is evaporated in the evaporator. The refrigerant becomes vapour and flows back to compressor. Then the refrigerant vapour is compressed in compressor again. Thus the room temperature is lowered by circulating this operation.

fan motor

cool air (heating)

upper fan

lower fan motor