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The primary function of a compressor in a refrigeration system is to compress the refrigerant vapor. This process increases the pressure and temperature of the refrigerant, allowing it to flow through the system and absorb heat from the environment. As the refrigerant is compressed, it transitions from a low-pressure gas to a high-pressure gas, which is essential for the refrigeration cycle to effectively transfer heat from the interior of the space being cooled to the outside environment. This compression is crucial as it enables the refrigerant to circulate through the system and undergo phase changes that facilitate cooling.

Understanding the role of the compressor is key for anyone involved in refrigeration, as it is a vital component that directly influences the efficiency and effectiveness of the entire cooling process.