The compressor is the pump part of the system that moves the cooling solution, Freon, through the auto air conditioning system. While moving through the system, the Freon, which is a gas and a liquid, is forced through different sized metal and rubber hoses and tubes, through what is known as an expansion valve. This continuous pressure and condensing and expanding of the Freon makes it get extremely cold within the metal and rubber hoses. As the Freon moves into the dash area of the automobile, it is moved into a metal tube system that is called the evaporator core.
This system is similar in function to a radiator, nonetheless, the extremely cold Freon within the interior of the metal tubes in the evaporator core cools the air that the air conditioner fan blows from the back of the dash to the front. This cooled air is then blown into the passenger area of the automobile through the vents found in the dash.
The control on the dash that the motorist or passenger can readjust does not control the temperature of the evaporator core, rather, it controls how much air is blown across the core. The greater the amount of air, the more cold air that is pushed into the automobiles cab or passenger area. More advanced auto air conditioning systems have a thermostat that automatically readjusts the fan and controls the temperature of the passenger area. As the temperature rises, the thermostat sends out a signal to the fan to speed up and produce more cold air, lowering the temperature.
Car air conditioning systems likewise get rid of heat from the automobile with the Freon that is returning from the evaporator core to the condenser Web site . This is done at the front of the engine, usually close to the radiator. The warmed Freon is moved to the condenser, which is like the evaporator core, however, instead of allowing the cold Freon to cool the air, it permits the hot Freon to release the heat to metal fins, then a fan blows this heat away from the engine. In this way, the auto air conditioning system works as both a cooling and a heat elimination system as the Freon circulates through the hoses and metal condenser.