10-4 A/C system 10. A/C and Safety System 4.2 Operating principle of system High pressure gas High pressure liquid Low pressure liquid Low pressure gas Cold air Evaporator Hot air in the vehicle Compressor Blower Expansion valve Condenser Dryer Outside air – When the A/C system is refrigerating, the compressor sucks the low-temperature and low-pressure gaseous refrigerant from the evaporator. After compression, the temperature and pressure of the refrigerant increase, and the compressed refrigerant will be sent to the condenser.
In the condenser, the high temperature and high pressure gaseous refrigerant passes through the condenser to dissipate the heat, and is liquefied into the high temperature and high pressure liquid refrigerant. – The high-temperature and high-pressure liquid refrigerant passes through the drier reservoir and high- pressure pipeline, quickly flows through the expansion valve, and is then throttled via the throttle expansion valve, thus being transformed from liquid to gas following a rapid temperature and pressure decline. At last, it is sent to the evaporator through the liquid separator head.
– In the evaporator, the air blower draws the air in the vehicle into the surface of the evaporator, and the air exchanges heat with the low-temperature, low-pressure aerosol refrigerant through the evaporator fins. After absorbing the air heat in the vehicle, the low temperature, low pressure vaporous refrigerant is evaporated into the low temperature, low pressure gaseous refrigerant, and then sent to the low pressure side of the compressor through the pipe for the next cycle. – The cold air released by the heat exchange is sent into the vehicle by the blower to reduce the vehicle temperature. VOYAH FREE