Air Conditioning System

How in the world can my car take the air from outside at 90F and turn it into a cold 50F breeze?

Interactive Tool

System
Mouse over this button to see the flow of fluid through the system. The system is comprised of 4 major components. The radiator, the expansion valve, the compressor, and the blower. Gases and Liquid expand and contract to take air at 70F+ down to 40F.
Radiator
Radiator
The radiator blows cool air over its coils and takes the refrigerant, R-134a, from a high temperature to a lower temperature. The radiator in this context contains a fan, a fan motor, and the coils that the refrigerant flows through. 
Expansion
Valve
Compressor
As the refrigerant flows through the compressor it goes from a cold to hot gas. It basically "prepares" the refrigerant to be turned into a liquid after the radiator.
Compressor
Under The Hood
Blower
The blower blows the cold air from the coils into your cabin. The blower is the thing that makes the loud noise as you crank up the air speed on your dials. It takes a cold liquid and blow the "cold" out of it. As it does this the refrigerant turns to gas or evaporates before it gets to the expansion valve.
In The Cabin
Expansion
Valve
Blower
A lot is happening here. The refrigerant coming from the radiator expands rapidly turns cold, around 40F, as it passes through the valve. The refrigerant coming from the blower coils slightly draws some heat from the radiator refrigerant before it passes into the condensor. This takes some load off of the compressor making the process more efficient.

Various Air Conditioning Pictures

  1. AC system
  2. air conditioning system
  3. air conditioning system
  4. air conditioning system
  5. air conditioning system
  6. Managing Director

High Pressure Port

Compressor

High Pressure Port Line
After Compressor

Low Pressure Port Line
Going to Compressor

High Pressure Line
After Exp. Valve

Low Pressure Port Line

High Pressure Port Line
After Compressor