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

The primary function of a filter drier in a refrigeration system is to remove moisture and contaminants from the refrigerant. Moisture in the refrigeration system can lead to a variety of problems, such as corrosion, ice formation, and chemical reactions that can degrade system performance and efficiency. Additionally, contaminants like dirt and debris can hinder the operation of various components, potentially causing blockages or damage.

By effectively filtering out these impurities and moisture, the filter drier ensures that the refrigerant remains clean and dry, which is crucial for maintaining the system's reliability and longevity. This not only enhances the overall efficiency of the refrigeration cycle but also protects sensitive components such as compressors and expansion devices from potential damage.

Options related to expanding the refrigerant, regulating temperature, or injecting refrigerant pertain to different components and functions within the refrigeration cycle, but they do not accurately describe the specific purpose of a filter drier.