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A Basic Overview of Automotive A/C....
Evaporator with Blower Fan
1
the A/C evaporator allows the refrigerant to absorb the heat from the air passing over it. The blower fan
moves cool air out into the car interior.
Compressor
2
The compressor pumps and circulates the refrigerant through the system.
Condenser
3
The condenser is a heat exchanger mounted at the front of the vehicle. Heat drawn
out of the interior of the car is expelled here.
Receiver/Drier
4
The drier not only dries refrigerant, it also filters the refrigerant and stores it
under certain operating conditions.
High Pressure Switch
5
pressure is detected, basically it acts as a safety switch.
S U C
T I O
N H
3
O S E
In order to remove the heat from the air in the vehicle,
A pressure switch is used to shut down the system if high or low
1
L I Q
U I D
G R O
H O
P O W
S E
E R
2
5
4
Receiver
Drier
U N D
The air conditioning system in your car is comprised of a compressor,
condenser, expansion valve, receiver/drier, and evaporator. Refrigerant (also
known as Freon) is compressed in the compressor. In the condenser, gas is
cooled to a liquid state and travels to the expansion valve. As the liquid refrigerant
goes through the expansion valve it rapidly cools in the evaporator. A fan blows
over the evaporator and cools the air that blows out your vents
OUTSIDE AIR
Suction
Valve Discharge
Condenser
Expansion Valve
AIR FROM INSIDE VEHICLE
Evaporator Unit
COLD AIR INTO VEHICLE
www.classicautoair.com • 866.435.7801
Valve
Compressor
Firewall
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