What is the primary function of the compressor in the refrigeration cycle?

The primary function of the compressor in the refrigeration cycle is to raise the pressure of the refrigerant vapor. When the refrigerant vapor enters the compressor, it is typically at a low pressure and temperature. The compressor draws in this vapor, compresses it, and raises its pressure significantly. This increase in pressure results in a corresponding increase in temperature, preparing the refrigerant for the next stages of the refrigeration cycle.

The high-pressure vapor then moves to the condenser, where it releases heat and condenses into a liquid. By elevating the pressure of the refrigerant, the compressor is essential in enabling the refrigerant to absorb heat from the surrounding environment during the evaporator phase and subsequently reject that heat once it's compressed. This transformation and movement of heat is what allows the refrigeration cycle to maintain low temperatures in the desired space.

The other options do not accurately reflect the compressor's primary role within the cycle, as they describe functions that are either not directly related to the compressor or pertain to other components of the refrigeration system.