Carbon monoxide poisoning in automobile air conditioning Because the doors and windows of the automobile are sealed, the air inside and outside the automobile is difficult to convection. When the automobile is parked, carbon monoxide generated by the engine is likely to gather in the automobile, causing poisoning, unconsciousness and even death in severe cases. The following is an introduction about automobile air conditioning: 1. Brief introduction: Automobile air conditioner is an air conditioning system composed of compressor, condenser, throttling element, evaporator, fan and necessary control elements, which regulates the temperature and humidity in the car and provides a comfortable environment for passengers. 2. Working principle: When the compressor is working, the compressor sucks low-temperature and low-pressure gaseous refrigerant from the evaporator, and the temperature and pressure of the compressed refrigerant are increased and sent to the condenser. The high-temperature and high-pressure gaseous refrigerant in the condenser transfers heat to the outside air passing through the condenser and liquefies into liquid. When the liquid refrigerant flows through the throttling device, the temperature and pressure decrease and enter the evaporator.