Countries to limit the use of Bromofluorocarbons, bromochloromethane and other substances refrigerant, compressor refrigerant to more environmentally friendly R410a, R290, R32, rapid conversion, because these environmentally friendly refrigerant heat transfer performance is better, more efficient, to improve the performance of power frequency conversion compressor to a certain extent. Ultra-small compressor is also an important growth point in the future, its compact structure, smooth operation, high efficiency, brushless motor drive, become the first choice of high-end, mobile or portable small refrigeration system. Our country has been able to produce the international leading super-miniature compressor with comprehensive performance. Compared with the ordinary compressor, the volume is reduced by 20% , the weight is reduced by 30% , the voltage range is widened by 20% , not only the consumption of steel and electric energy is saved, but also the space is saved, to meet the needs of larger refrigerators, air-conditioning thinner demand. But because this technology has not yet universal, ultra-small compressor quality is uneven, whether to develop into the mainstream of the market remains to be tested. With the increasing number of car owners, but also for the car air conditioning to create a broader market environment. At present, the air-conditioning configuration ratio of cars on passenger cars in our country is close to 100% . The variable displacement compressor has become one of the main products. This kind of compressor is compact, fuel-saving, and has good shock resistance.