Accumulator HVAC: Description and Operation

Accumulator-Interior Parts:

Description

Connected to the evaporator outlet pipe, the sealed accumulator assembly acts as a refrigerant storing container receiving vapor and some liquid and refrigerant oil from the evaporator.

Operation

At the bottom of the accumulator is the desiccant which acts as a drying agent for moisture that may have entered the system. This desicant is specifically for R134a. An oil bleed hole is also located near the bottom of the accumulator outlet pipe to provide an oil return path to the compressor.