Piston

The piston in a car’s air conditioning compressor is a component that compresses the refrigerant by moving up and down inside a cylinder. It’s typically a circular or cylindrical part that is attached to a connecting rod and moves in a reciprocating motion. As the piston moves down, it creates a vacuum that draws in refrigerant, and as it moves up, it compresses the refrigerant, raising its temperature and pressure. This compression process is essential for the proper functioning of the air conditioning system, as it helps to circulate and cool the refrigerant.