Precooling Circuit Technology
Auxiliary flow path: The auxiliary expansion device receives the refrigerant liquid from the condenser and expands it to lower both the temperature and the pressure of the refrigerant liquid. The sub-cooler the cold liquid refrigerant from the auxiliary expansion device and evaporates it into the cold gas cold air. The body refrigerant is returned to the compressor to complete the refrigeration cycle.
External circulation principle: The humid air reaches the saturated steam state after passing through the microchannel precooler, and the evaporator cools the air to below the dew point, hence increasing the water vapor condensation rate to a liquid, therefore, dehumidifying the air. The dehumidified air is heated by the condenser, then discharged.