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The air-conditioning system in a car works by manipulating refrigerant between a liquid and a gaseous state. As the refrigerant changes states, it absorbs heat and humidity from the vehicle and allows the system to give off cool, dry air.
To change the refrigerant between a liquid and a gaseous state, the air-conditioning system works to control pressure and temperature.
Car AC System Parts
Automotive air-conditioning systems have a few key components. Listed below are the main parts and their roles:
Compressor
Power unit of the system that separates the low-pressure side from the high-pressure side
Takes in low-pressure gas and compresses it into high-temperature/high-pressure gas
Mounted to front of engine and driven by serpentine belt
Condenser
Reduces temperature of refrigerant while it maintains high pressure
Refrigerant changes from gaseous state to liquid state as it cools
Similar to the engine radiator, it uses forced air (fan or vehicle movement) to transfer heat
Mounted in front of vehicle, behind grill
Dryer
Removes water from the refrigerant using a desiccant (drying agent)
Has some system-filtering properties
Mounted on high-pressure side of system, between condenser and metering device
Metering Device
Either expansion valve or fixed orifice tube
Lowers refrigerant pressure, which quickly drops refrigerant temperature
Refrigerant is still in liquid form after leaving
metering device
Mounted on high-pressure side of system, between dryer and firewall
Evaporator
Refrigerant changes back to gaseous state in the evaporator, causing a cooling effect
Cabin air is cooled and dried as it blows across the evaporator
Only component mounted inside passenger compartment, behind dashboard
Негізгі бет കാർ എയർ കണ്ടിഷനിങ് || Car air conditioning || air condioning || hvac
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