What is the main role of an accumulator in a refrigeration system?

The main role of an accumulator in a refrigeration system is to store excess refrigerant and prevent liquid from entering the compressor. This is crucial for the efficient operation of the refrigeration system. The accumulator acts as a buffer that collects any liquid refrigerant escaping from the evaporator before it reaches the compressor. By ensuring that primarily vapor refrigerant enters the compressor, the accumulator protects against potential damage caused by liquid slugging, which can lead to compressor failure. Additionally, it allows the system to maintain an optimal charge of refrigerant, aiding in better cooling performance and efficiency.

Other roles such as cycling the refrigerant, cooling it before entering the evaporator, or assisting in the defrost cycle do not specifically describe the accumulator's functionality in the context of its protection and regulation roles within the refrigeration system.