Accumulator
Accumulator turns up in 2 fields: HVAC, mechanical. Here is what it means to the people in each one.
Accumulator in HVAC
A tank in the suction line that catches liquid refrigerant before it can reach and damage the compressor.
Liquid drops to the bottom and boils off slowly, while vapor leaves from the top through a U-tube with a small oil return hole so oil keeps moving to the compressor. Accumulators are standard on heat pumps, which flood back during defrost and changeover, and on many fixed orifice systems. A sweating or frosted accumulator on a running system means liquid is coming back.
"Accumulator is frosted down to the base, it's flooding back, check airflow inside before you touch the charge."
Accumulator in mechanical
A pressure vessel that stores hydraulic fluid under pressure to release energy on demand.
This component acts as an energy storage device in hydraulic systems, typically using compressed gas behind a bladder or piston to maintain fluid pressure. It provides a quick burst of flow to assist a pump during peak demand, absorbs pressure spikes, and maintains system pressure if the main pump fails.
"The accumulator lost its nitrogen charge, which is why the hydraulic cylinders are reacting so sluggishly."