The dynamic characteristics of automobile operation and the changeable external environment have put forward some special requirements for the performance and structure of automobile air-conditioning compressors, which are reflected in:
1. To have good low-speed performance, the compressor is required to have a large cooling capacity and high efficiency when the car engine is low-speed and no-load.
2. The input power of the car is low when driving at high speed, which not only saves fuel consumption, but also reduces the power consumption of the engine for air conditioning and improves the power performance of the car itself.
3. The compressor should be small and lightweight, which can save the space of the car, the installation location is convenient, and the consumption of materials and fuel can be saved.
4. It must be able to withstand the test of harsh operating conditions and have a high degree of reliability and durability. When idling, the temperature in the engine compartment of the car is sometimes as high as 80°C and the condensing pressure is high, which requires the compressor to withstand high temperature and high pressure and limited overload. The car always has bumps and vibrations on the road, which also requires the compressor to have good shock resistance and reduce refrigerant leakage to a minimum.
5. Do not adversely affect the car. The compressor is required to run smoothly, with little vibration, low noise, little influence of start and stop on the engine speed, and little start-up torque.
