What role does a filter drier play in a refrigeration system?

A filter drier is a crucial component in refrigeration and air conditioning systems, primarily responsible for removing moisture and contaminants from the refrigerant. Moisture in a refrigerant system can lead to various problems, including corrosion, freezing, and the formation of acids, which can severely damage the system's components. The filter drier contains a desiccant material that actively absorbs moisture and provides filtration to capture solid impurities. This dual function helps maintain the integrity and efficiency of the refrigeration cycle, ensuring the system operates smoothly and prolongs its lifespan.

While filtering air, regulating flow rate, and compressing refrigerant are important operations in a refrigeration system, they are not the primary functions of the filter drier. Its focus is predominantly on moisture removal and contaminant filtration, making the chosen answer essential for understanding the maintenance and reliability of refrigeration systems.