Studying cooling technology in general includes a general description of cooling techniques, Mollier diagrams, terms in cooling engineering, 1st law of thermodynamics, and coefficient of performance (COP); History of the development of car air conditioning, construction and working principles of car air conditioning, components of car air conditioning, electrical installation of car air conditioning, control devices for car air conditioning, refrigerant (Freon), charging refrigerant in car air conditioning, and maintenance of car air conditioning