Energy-saving principle and effect of permanent magnet variable frequency air compressor: High-efficiency compressor mainframe produced by advanced screw profile technology; The ingenious design of the intake and exhaust system ensures that the compressor sucks in colder air at a lower temperature and improves the compression efficiency; The exhaust pipeline and exhaust port design fully consider the margin and reduce the turbulence to minimize the exhaust pressure resistance; The centrifugal suction fan ensures that each fin of the radiator is effectively used; The high-efficiency permanent magnet variable frequency motor adopts the IP54 structure and has an independent cooling fan to ensure that the motor itself does not have a high temperature when the compressor is running at low speed, and fundamentally avoids the phenomenon of magnetic weakening and demagnetization of the permanent magnet motor due to high temperature; Advanced and scientific design concept, cold and hot partition of the whole machine, detailed design for every bit to improve efficiency.