More and more people have joined the car-owning community and become one of its members. However, knowing how to drive but not knowing how to drive may endanger your life and bring serious consequences. Driving also requires intelligence and skills, both of which are indispensable. Otherwise, some details are ignored when driving, that is, incorrect operation methods. When running on the highway, the car will be in a sweltering state for a long time. At this time, should the car turn on the internal circulation or the external circulation? The veteran driver reminds all riders, don’t make a mistake. It is very dangerous to use it incorrectly. Don’t wait until the situation is irreversible to suddenly realize it.
Car internal and external circulation plays a very important role. It can circulate the air inside and outside the car and maintain the temperature inside the car to achieve a good effect. If the car is closed for a long time, the internal air quality is too poor and unhealthy air is sucked into the mouth. , it affects our body.
Driving on the highway, because the speed of the car is relatively fast, and most of the highways are in the suburbs, so as long as there are no traffic jams on the highway, the air quality is actually relatively good. It is much better than in the city, so the external air environment Under relatively good conditions, many friends want to turn on external circulation to circulate air inside and outside, but there is another problem here, because highway speeds are relatively fast.
When the external circulation is turned on, usually the car does not have a small hole in the lower edge of the front hood of the car. When the external circulation of the car air conditioner is turned on, the small hole will open to allow air to flow , but there is still a hole inside the car hood. There is an engine, and the temperature inside can be said to be quite high. As shown in the picture, the small hole is not far from it. When the external circulation is turned on, the hot air from the outside will blow into the car through the small hole at high speed. In this case, the air conditioner is turned on. It basically doesn’t have much effect, so you can only turn the air conditioner temperature lower. So is this really the case?
In fact, under normal circumstances, if you drive on the highway in summer, the temperature is very high, especially at noon. It is very possible for the road temperature to reach 37 or 8 degrees or even 40 degrees. In this case, if you turn on the external circulation, the temperature outside will be very high. The hot air and the heat of the engine enter the car through the air inlet, which will indeed increase the temperature inside the car to a certain extent and make people very uncomfortable. Some cars may even drive to the lowest speed if the space effect is not good. Everyone will feel the same as if it is turned on or not turned on, but this effect is not absolutely correct. Generally, it will only occur when the outside temperature is very high and the vehicle speed is very fast, such as the temperature is 30 degrees or even 31 degrees. Secondly, when the car speed is less than 100, there is actually no need to worry about this.
Moreover, if the external circulation is not turned on, there is a big disadvantage of turning on the internal circulation for a long time, that is, the oxygen content in the car will be reduced. Although the car is not 100% sealed, it does not mean that there is only a little air in the car after the internal circulation is turned on. They can't get in, but compared with external circulation, the air replacement and circulation are indeed significantly reduced. Therefore, if the internal circulation is long-term and driving for a long time, the person will easily become sleepy and fatigued, and driving in this state on the highway is very dangerous.
So when driving at high altitude, if there is no traffic jam and the road conditions are good, if you want to maintain the temperature, you can turn on the internal circulation for a long time, but you must switch to the external circulation for 5 to 10 minutes within an hour to let the outside Bring fresh air in to increase the oxygen content in the car, and learn to use the internal and external circulation flexibly. For example, in tunnels where the air is relatively poor, you can switch to the internal circulation. This can well prevent dirty air from outside the car from entering the car. Internal and external circulation, no matter which one is used for a long time, it is wrong. Flexible use of staggered use according to the actual situation is the correct approach.
