Automotive air conditioning has become nearly universal, with all new cars coming equipped with it. Air conditioning has worked pretty much the same way for it’s entire existence. There are three main parts to the system, the compressor, condenser, and evaporator!
Starting at the compressor, the refrigerant is compressed into a high pressure, high temperature gas, typically about 200psi, and then the compressor pumps the refrigerant vapour under high pressure to the condenser.
The condenser is a device used to change the high-pressure refrigerant vapor to a liquid. The high-pressure refrigerant, now in liquid form then flows into the receiver dryer. The receiver dryer has two functions, to dry the refrigerant and to store the liquid refrigerant as it comes out of the condenser.
Once the refrigerant leaves the receiver dryer, it flows to the expansion valve. The valve removes pressure from the liquid refrigerant so that it can expand and become refrigerant vapour in the evaporator.
Located inside the vehicle, the evaporator serves as the heat absorption component. As the cold low-pressure refrigerant is passed into the evaporator, it vaporises and absorbs heat from the air in the passenger compartment. The blower fan inside the passenger compartment pushes air over the outside of the evaporator, so cold air is circulated inside the car.
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