What is a characteristic feature of a suction accumulator?

A suction accumulator is specifically designed to collect excess refrigerant and manage liquid refrigerant that might return to the compressor. One of its defining features is that it includes both an inlet and an outlet. The inlet is where the vapor refrigerant enters the accumulator, allowing any liquid refrigerant to settle at the bottom, while the outlet provides a path for the vapor to exit towards the compressor. This design helps to prevent liquid refrigerant from entering the compressor, which could cause damage.

The other options do not accurately describe the primary function of a suction accumulator. It does not filter gases, as that is not one of its purposes. Additionally, while it helps manage refrigerant flow, it does not inherently regulate the temperature of the overall system nor does it shut down the compressor when needed. Instead, its primary role is to ensure only vapor, not liquid, enters the compressor, which is critical for maintaining the efficiency and safety of the refrigeration system.