R12 and R22 cannot generally be substituted for each other. Commonly used refrigerants for refrigerators include R12, R134, R600, R152/R22. Commonly used refrigerants for azeotropic air conditioners include R22, and new refrigerants include R404 large-scale refrigeration equipment, for general use, ammonia, lithium bromide, liquid nitrogen, R22, R404, R407 , R23 is used for individual thermal shock boxes (rarely). General thermal shock boxes are used. R22 and R404 refrigerator repairs can be replaced by R12 instead of R134 and R600a systems. The main difference is the difference between refrigerating oil.
According to the driving mode, it is divided into independent type (a dedicated engine drives the compressor, which has large cooling capacity and stable operation, but high cost, large volume and weight, mostly used in large and medium-sized passenger cars) and non-independent type (air-conditioning compressor is provided by the car) Driven by the engine, the cooling performance is greatly affected by the work of the engine, and the stability is poor. It is mostly used in small passenger cars and cars).
According to air-conditioning performance, it is divided into: single-function type (install cooling, heating, and ventilation systems separately, operate separately, without interference, and mostly used in large passenger cars and trucks) and integrated cooling and heating (cooling, heating, and ventilation sharing blower and wind It can be controlled on the same control panel, and it can be divided into a combined type where the cold and warm air work separately and a mixed temperature adjustment type where the cold and warm air can work simultaneously.
According to the control mode, it is divided into manual type (toggle the function keys on the control panel to control the temperature, wind speed, and wind direction) and electronically controlled pneumatic adjustment (using the vacuum control mechanism, when the air conditioning function key is selected, it can be within the predetermined temperature Automatic control of temperature and air volume).
