Royal Mechanical Engineering

Automotive air conditioning is done to control the temperature, humidity, purity of the atmospheric of the air and circulate the same in the automobile to make the journey of passengers comfortable so that they Should not feel too much cold in winter and too hot in summers. Earliest, most of cars were having the cooling provision only as shown in Figure. It consists of refrigeration system, an air circulation and distribution system and a control system as shown in the layout. It includes the compressor, condensor, dehydrator and connecting lines in addition to expansion valve, orifice tube, suction throttle valve and high pressure cut off  switch. The commonly used refrigerant is freon 12 . The compressor driven by a belt from the engine pulley through an electromagnetic clutch sucks the low temperature and low pressure refrigerant vapour from the evaporator ad compresses it to high temperature and high pressure vapor. Then it is discharged to the condenser Air is caused to flow acros