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What is the role of a car ventilation system?

The so-called car ventilation system refers to a device that can circulate air in the car compartment. Its function is to introduce fresh air from outside the car into the car, and at the same time discharge the dirty air from the car.

There are generally three types of ventilation systems in automobiles, namely natural ventilation, forced ventilation and comprehensive ventilation.

The so-called natural ventilation refers to the use of the pressure difference between the inside and outside of the car to allow the air to circulate inside and outside the car. 

For example, opening the glass or sunroof is the simplest natural ventilation. 

When the doors and windows of the car are fully closed, the car can still feel cool. 

The wind is also the credit of natural ventilation; forced ventilation refers to the use of air-conditioning blowers to force the fresh air outside the car into the cabin, and finally achieve ventilation; comprehensive ventilation refers to the use of natural ventilation and forced ventilation in the car at the same time. Generally, vehicles use comprehensive ventilation during normal driving.

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