Principle of Operation: Drier

From the condenser, liquid refrigerant under high pressure flows to the receiver/drier. The drier consists of a cylindrical tank to hold the refrigerant and a solid drier. The solid drier is made from zeoliite, molecular sieves and aluminum oxides. The drier is designed to separate the refrigerant vapor from the liquid so that only the liquid is fed to the expansion valve.

After the refrigerant has passed through the condenser the remaining gas in the refrigerant liquefies and passes through the desiccant and filter removing moisture and solid impurities. The refrigerant flows into the sub-cooler section where it is further cooled resulting in the refrigerant at the outlet being almost 100% liquid.