DOES AIR CONDITIONING SYSTEMS WORK?
The Air Conditioner
There are various kinds
of auto AC systems, basically they all work in the same manner. Warm air
passes over a refrigerant, transfers its heat to the refrigerant and becomes
cool air entering your vehicle.
Air passes through the vent
into the interior of the vehicle.
The Expansion Valve determines
the correct amount of refrigerant going into the evaporator, and it lowers
the pressure of the refrigerant. When the compression starts, the expansion
valve opens and the liquid refrigerant flows into it. Once in the expansion
valve, the refrigerant is correctly pressurized. As the evaporator calls
for more refrigerant, the expansion valve allows the required amount of
refrigerant into the coils.
The evaporator is a long
tube that goes back and forth through a set of cooling fins. The refrigerant
enters the evaporator and a fan blows warm air over the evaporator. The
cold refrigerant absorbs the heat from the warm air. Once it has absorbed
the heat from the warm air, the warm air isn't warm anymore. The same blower
that blows the warm air (that is now "cool" air) over the evaporator, keeps
on blowing it into the interior of your car, and you have -- air conditioning!
The compressor in your car
works in a similar way to the one in your refrigerator. The job of the
compressor is to move liquid refrigerant around in a pipe. The compressor
pumps the liquid from the evaporator into the condenser and expansion valve,
and then back to the evaporator.
The condenser is a long
tube that goes back and forth through a set of cooling fins. The condenser
is mounted in front of the radiator to catch the forced air provided by
the fan and the motion of the car. As the refrigerant flows into the condenser,
it gives off heat. The refrigerant is warmer than the air passing over
it so the condenser hands its heat off to the air and turns the refrigerant
back into cool liquid in the expansion valve, where it heads back to the