How does a liquid receiver function in a refrigeration system?

A liquid receiver plays a crucial role in a refrigeration system by storing liquid refrigerant and ensuring a steady supply to the expansion valve. After the refrigerant has been vaporized in the evaporator and compressed in the compressor, it enters the condenser where it releases heat and transforms back into a liquid state. The liquid receiver collects this liquid refrigerant from the condenser, allowing it to be stored until it is needed for cooling.

By maintaining a buffer of liquid refrigerant, the receiver ensures that the expansion valve receives the right amount of refrigerant at the right pressure and temperature, enabling efficient operation of the refrigeration cycle. This is critical for maintaining the system's overall efficiency and performance, as it helps to prevent fluctuations in the supply of refrigerant that could impact cooling effectiveness.

Other options do not accurately describe the primary function of a liquid receiver. While some components in the refrigeration system perform cooling or filtering tasks, those roles are not the primary purpose of the liquid receiver.