What is the function of a compressor in an air conditioning system?

The function of a compressor in an air conditioning system is to compress and move refrigerant. The compressor plays a critical role in the refrigeration cycle, which is the heart of any air conditioning system. When the refrigerant returns to the compressor as a low-pressure gas, the compressor compresses it into a high-pressure gas. This process increases the temperature of the refrigerant, allowing it to move through the condenser coil where it will release heat and condense into a liquid form. By compressing and moving the refrigerant, the compressor facilitates the entire cycle of heat transfer that ultimately cools the indoor environment.

It is important to note that while air circulation and cooling of the refrigerant are necessary processes within an HVAC system, they are not the primary functions of the compressor. Similarly, humidifying the air is unrelated to the compressor's role, as that function is usually managed by a separate piece of equipment or system component. Thus, understanding the essential role of the compressor clarifies its importance in the overall operation of an air conditioning system.