Why is a receiver used in a refrigeration system?

A receiver plays a vital role in a refrigeration system by storing liquid refrigerant and helping to maintain system balance. When the refrigerant passes through the evaporator and condenses, it becomes liquid and needs to be temporarily stored before it is sent back into the expansion valve or evaporator. This storage capability allows the system to avoid fluctuations in refrigerant flow and pressure, ensuring more consistent operation and efficiency.

The receiver also allows for the separation of vapor from the liquid refrigerant, ensuring that only liquid enters the expansion device. This contributes to the reliability and performance of the refrigeration system. By maintaining a reserve of liquid refrigerant, the receiver supports system stability, especially during varying load conditions. It can also provide a buffer against refrigerant migration and other operational issues.

Thus, the essential function of the receiver aligns perfectly with its design and purpose within the refrigeration cycle.