Which component helps ensure that only vapor enters the compressor?

The accumulator is a crucial component in a refrigeration or air conditioning system that plays a vital role in ensuring that only vapor enters the compressor. Its primary function is to collect excess refrigerant, particularly liquid refrigerant, in order to prevent it from entering the compressor, where it can cause damage.

When the refrigerant cycles through the system, it transitions from a liquid to a gas and then back to a liquid. If any liquid refrigerant were to enter the compressor, it could lead to a phenomenon known as "liquid slugging," which can cause severe mechanical failure or damage to the compressor's internal components.

By capturing excess liquid refrigerant, the accumulator ensures that the gas sent to the compressor is free of liquid, maintaining optimal performance and longevity of the compressor. This is especially important in systems where the refrigerant load can vary significantly, helping to manage fluctuations effectively.

The other components mentioned have their own specific functions, but they do not primarily focus on preventing liquid refrigerant from entering the compressor. For instance, the condenser is responsible for releasing heat and condensing the refrigerant from vapor to liquid, while the liquid receiver stores the refrigerant in liquid form. The sight glass serves as a visual indicator for liquid refrigerant in the system