What role does an accumulator serve in a refrigeration system?

An accumulator plays a crucial role in a refrigeration system by storing excess refrigerant vapor. Located between the evaporator and the compressor, its primary function is to capture and hold refrigerant vapor that may not be completely converted from liquid to gas by the evaporator. This is particularly important in providing a buffer to prevent liquid refrigerant from entering the compressor, which can cause damage. By ensuring that only vapor enters the compressor, the accumulator helps maintain system efficiency and prolongs the life of the compressor.

In addition, the ability of the accumulator to store excess vapor allows the refrigeration system to accommodate varying levels of load, helping it operate smoothly under different conditions. This feature facilitates a more reliable and efficient performance of the system as a whole. The other choices do not accurately describe the function of the accumulator, reinforcing the importance of its specific role in managing refrigerant vapor.