What is the primary function of the receiver-dryer in a vapor-cycle cooling system?

The receiver-dryer in a vapor-cycle cooling system primarily serves as a reservoir for the refrigerant. Its main purpose is to store the liquid refrigerant that has been condensed from the gas phase. This storage function is crucial because it allows for a consistent supply of refrigerant to the expansion device, where the refrigerant will enter the evaporator coil to absorb heat and provide cooling.

In addition to being a reservoir, the receiver-dryer typically contains a desiccant material that removes moisture from the refrigerant, preventing any potential issues associated with water contamination, which could lead to system corrosion or freeze-up. This dual role of storing refrigerant and ensuring its purity is vital for the efficient operation and longevity of the cooling system.

The other functions mentioned, such as converting refrigerant phases, regulating temperature, or controlling pressure, are responsibilities typically handled by other components within the vapor-cycle system, making the receiver-dryer specifically focused on its role as a holding point for the liquid refrigerant and ensuring its quality.