The difference between the inner cycle and the outer cycle of the car, how to use it correctly?

Air conditioning is our indispensable partner, whether it is in the cold winter or hot summer, it can provide us with comfortable temperatures. The car air conditioning has two ventilation Settings of internal circulation and external circulation, and the different circulation mode will also make the temperature and air quality in the car different. Therefore, during the driving process, the correct choice of inner or outer cycle is crucial.

Innerl cycle, simply put, is that the air inside the car circulates inside the car, closing the channel for the outside air to enter the car. It is equivalent to closing all doors in a space to avoid the entry of outside air and carry out internal air circulation.

Innerl cycle can not only effectively isolate external dust and pollutants, but also improve the air quality in the car. In addition, the internal circulation can quickly cool or heat the compartment.

The outer cycle is to use the fan to pump fresh air into the car, and then through the air conditioning system to exhaust the dirty air inside the car, and the air inside and outside the car is circulating. It is equivalent to opening all the doors in a space to let in outside air.

Outer cycle can not only improve the air quality in the car, but also prevent the concentration of carbon dioxide in the car. In addition, in the colder season, when the car needs rapid defrosting, the external cycle can quickly solve the problem.

Inner cycle

◆  When passing through the tunnel, because the ventilation effect in the tunnel is poor and the air is relatively dirty, the use of internal circulation can prevent the smoke and exhaust gas in the tunnel from entering the car and ensure the air quality in the car.

◆   When the interior needs rapid heating and cooling, the use of internal circulation can improve efficiency and make the interior temperature reach the ideal state.

◆   When there is a traffic jam in the urban area for a short time, the use of internal circulation can reduce the harmful gases entering the carriage and protect the health of passengers due to the intensive exhaust emissions outside the vehicle.

Outer cycle

◆   There are more harmful substances in the new car that has just been bought, and opening the external circulation at this time can effectively exhaust the odor in the car and improve the air quality in the car.

◆   When driving long distances or on the highway, the concentration of carbon dioxide in the car may rise, and the appropriate use of external circulation can keep the air in the car fresh and avoid driver fatigue.

◆   After the vehicle is exposed to the sun, first open the window to let in the air, and at the same time start the external circulation, so that the fresh air from the outside quickly flows in, taking away the hot and harmful gases.

When driving in rainy days, if the glass is found to be fogging, the use of external circulation can quickly absorb fog, improve the clarity of sight, and ensure driving safety.

▍▍▍▍▍▍

To sum up, choosing the right circulation mode of automobile air conditioning is not only crucial to the control of the temperature inside the car and the improvement of air quality, but also can effectively improve the comfort and safety of driving. However, to choose which type of cycle, the owner should choose flexibly according to the actual road conditions and weather conditions.