The internal and external circulation of the correct use of the car is very important for those who drive，Not only affects the environment in the car, but also may affect the safety of driving，First of all, take everyone to distinguish the logo of the inside and outside of the car，Let's take a look at the figure below，The location of each car button may be designed differently，But you only need to recognize the graphic logo!

During the driving process，Car owners often close the window，I'm afraid there will be a cold air flowing into the car。But do you find it，When driving in the city，The taste of the car is often filled with the taste of the car，When driving in an empty place or on high -speed roads，But feel dizzy and chest tight。This is because the owner is during driving，No correct use、。

In -car、What is the role of the outer cycle? When should I use internal circulation，When should we use an external cycle? Car maintenance and maintenance public platform reminds car owners，During the seabet logindriving process，If you cannot correctly master the use of internal and external circulation，The dirty air will cause great damage to the body。

Seabet

Inner cycle: blocking the dirty gas

Actually，Fan in the car opens，There are two types of use in external circulation and internal circulation，It is achieved through the conversion switch。outer circulation status is to use the fan to draw the air from the outside of the car to the inside of the car，That is to say, the airway outside the car and the inside of the car is circulating，The wind from the fan comes from outside the car，Even if the fan is not opened，Vehicle still has airflow inhaled in the car，Fresh air in the car。Sometimes I feel that it is still winding when the fan is turned off，Sometimes I feel that it is still winding when the fan is turned off。When driving in the city, when you encounter a congestion in the city，The inside of the car will be full of tail odor，This is caused by the use of external circulation。

Inner circulation status is to close the air flow channel inside and outside the car，Without the ventilator, there is no air circulation，The airflow inhaled during the ventilator is only from the car，Forms an air circulation inside the vehicle。Inner loop mainly prevent external dust and harmful gases from entering the car，For example, through smoke、Dust、When the odor area or the vehicle is dense and compact,，Blocking harmful tail gas from the front car。Another role is insulation。

Internal circulation of traffic jams, high -speed external circulation

Use external circulation，You can breathe fresh air outside the car，High -speed driving，After a long time, I feel that the air in the car seabet loginis turbid，People are uncomfortable，Can't open the window，It should be used to come in with outer circulation; warm wind feels too hot in winter，Turn off the fan，Open the outer cycle，Keep both the temperature in the car，There are fresh air，It feels more comfortable。

But if the air conditioner is turned on to reduce the temperature in the car，Do not turn on an external circulation at this time，You can open an outer cycle for a while，Replace some fresh air。Someone uses air conditioners to complain in the summer to complain that the cooling effect is not good，In fact, it was accidentally set as an external circulation state，The hot air source outside the car is continuously flowing into the car，Of course, the temperature cannot be reduced。So if you want to refrigerate, you must set it to the inner circulation state; if the temperature is not too hot，Tay a little air conditioner to adjust，You can drive to the outer cycle，People are more comfortable，There is a breeze again，People are more comfortable。

Another，Because most car owners are driving in the city，So remind the owner，Drise section at the peak period of commuting，Especially in the tunnel，Internal circulation should be used as much as possible。When the car starts to drive normally,，It should be opened to the outer cycle state。Another，Auto maintenance and maintenance public platform reminds car owners，Anyway section of the dusty soil，While closing the window，Don’t forget to close the external cycle to block the external airflow。Usually when parking, it is best to set it to inner circulation status，Due to the external cycle state，The dust from the wind can easily enter the car，increase the dust in the car。