What is the primary purpose of an accumulator in a heat pump system?

What is the primary purpose of an accumulator in a heat pump system?

• A. To prevent slugging
• B. To increase refrigerant charge
• C. To reduce noise
• D. To improve efficiency of the compressor

Answer: (A)

An accumulator’s main job is to protect the compressor by preventing liquid refrigerant from slugging back into it. It sits on the suction side after the evaporator and acts as a small reservoir that captures any liquid that might be carried with the vapor. By allowing that liquid to separate and vaporize before reaching the compressor, it keeps the compressor from being struck by liquid, which can cause mechanical damage and poor lubrication, especially during startup or rapid load changes. It also helps dampen suction surges a bit. It isn’t designed to increase refrigerant charge, reduce noise, or directly boost efficiency; its primary benefit is protecting the compressor from liquid slugging.

An accumulator’s main job is to protect the compressor by preventing liquid refrigerant from slugging back into it. It sits on the suction side after the evaporator and acts as a small reservoir that captures any liquid that might be carried with the vapor. By allowing that liquid to separate and vaporize before reaching the compressor, it keeps the compressor from being struck by liquid, which can cause mechanical damage and poor lubrication, especially during startup or rapid load changes. It also helps dampen suction surges a bit. It isn’t designed to increase refrigerant charge, reduce noise, or directly boost efficiency; its primary benefit is protecting the compressor from liquid slugging.