What is the function of a filter drier in a refrigeration system?

The function of a filter drier in a refrigeration system is primarily to remove moisture and contaminants from the refrigerant, which is critical for the protection and proper functioning of the system's components. Moisture can lead to corrosion, ice formation, and chemical reactions that can cause significant damage to the refrigeration system, such as blockages and breakdowns. By filtering out these impurities and moisture, the filter drier helps maintain the integrity and efficiency of the system, ensuring reliable operation over time.

This aspect is particularly important because clean refrigerant helps to prevent compressor failures, avoids system inefficiencies, and extends the lifespan of various components like the expansion valve and evaporator. The filter drier essentially acts as a safeguard to ensure a healthy refrigerant environment within the system, thus promoting optimal performance.

Other options, while related to the operation of a refrigeration system, do not accurately describe the role of a filter drier. Increasing pressure levels, assisting in heat exchange, and monitoring refrigerant flow rate involve different components and functions that are not associated with the filter drier specifically.