The condenser is a heat exchanger. The condenser cools down the refrigerant (heated up by the compressor) and becomes a liquid by transferring its heat to the flow of ambient air passing through it.
The evaporator fan motor circulates air through the coils of the evaporator to remove heat from the circulating air. It is a component of the overall refrigeration system.
The compressor is the key component of the HVAC system that generates high pressure before pumping refrigerant into the condenser, where it transforms from a gas to a liquid.