Receiver Dryer: Description and Operation

Receiver Dryer (Desiccant Container)
The function if this is both to store and desiccate refrigerant. The refrigerant which comes in to the desiccant container is in liquid form and under high pressure.

It passes through the filter unit where it is dehydrated and any particles are separated. The refrigerant is then led on in liquid form to the expansion valve. There is a pressure switch on the desiccant container which disconnects the compressor if pressure becomes too low in the system.

There is a sight glass on the desiccant container which indicates the amount of refrigerant in the system.