Receiver Dryer: Description and Operation

The dryer bottle has two separate functions. First it is a storage tank, since the amount of refrigerant required by the evaporator varies under different operating conditions. It receives the high pressure warm refrigerant liquid from the condenser through its inlet line and delivers the refrigerant to an expansion valve through its outlet line. Secondly it contains a filter and desiccant to remove and retain foreign particles as well as moisture from the refrigerant which would he harmful to the system if allowed to circulate with the system.