Which component's primary function is to compress refrigerant vapor?

The primary function of the compressor in a refrigeration system is to compress the refrigerant vapor. This process involves the compressor drawing in low-pressure refrigerant vapor from the evaporator and compressing it to a higher pressure, converting it into a high-pressure vapor. By increasing the pressure and temperature of the refrigerant, the compressor enables effective heat exchange in the subsequent components of the system, particularly in the condenser. The operation of the compressor is essential for maintaining the refrigerant cycle, as it moves the refrigerant through the entire system, facilitating the absorption and rejection of heat.

The other components play different roles within the refrigeration cycle. The condenser is responsible for releasing heat from the refrigerant as it transitions from a gas to a liquid. The expansion valve reduces the pressure of the refrigerant, allowing it to expand and cool before entering the evaporator. The evaporator, on the other hand, absorbs heat from the environment, causing the refrigerant to evaporate and cool the air or liquid that passes over it. Each component is crucial, but the compressor's unique role in compressing vapor is what distinguishes it in this context.