Many friends joked that among the greatest inventions in the world today, air conditioning can be regarded as one! To be honest, I agree with this view! Because blowing the air conditioner is really cool! But when it comes to air conditioning, most of our cars are also equipped with air conditioning, but the difference between car air conditioning and household air conditioning is that it is divided into internal circulation and external circulation, so what is the difference between the two? Old driver: if you drive wrong, not only the fuel consumption is higher, but also it is more dangerous for our safety.

First of all, the external circulation, as the name suggests, is the circulation of exhaust and suction between the air inside the vehicle and outside the vehicle. In short, the external circulation is to suck the air outside the vehicle into the air conditioner for refrigeration, and then send it into the vehicle. Therefore, the greatest function of the external circulation is to keep the fresh air inside the vehicle while cooling. The other function is that the air outside the vehicle is usually drier, The use of external circulation can play a better effect of glass defrosting and defogging.

The internal circulation is also well understood, that is, the air circulates in the car, that is, the air conditioner sucks in the air in the car and then sends it back to the car after refrigeration. In this cycle, the internal circulation has a biggest advantage over the external circulation, that is, the refrigeration effect is stronger! The energy consumption of the car will also be lower! When the weather is hot, the external air temperature is very high. When the external circulation is turned on, the air conditioner needs to consume a lot of power to cool the external high-temperature air. Therefore, not only the refrigeration effect is worse, but also the energy consumption will be lower. Therefore, the internal circulation can be regarded as a cost-effective way to turn on the air conditioner, but if the internal circulation is turned on all the time, it will also cause more serious consequences.

Therefore, we conclude that turning on the air conditioner can not only turn on one mode. If you keep turning on the external circulation, it will cause unnecessary waste of power consumption and improve the fuel consumption of the vehicle, while turning on the internal circulation all the time will lead to fatigue driving of the personnel in the vehicle. Therefore, the best way is to open the window for ventilation after turning on the circulation for a period of time, Or switch to the external circulation for blowing for a while, and then switch back to the internal circulation.

It's worth mentioning that it's best to use internal circulation when in a traffic jam or parking for a short rest, because there are cars around in a traffic jam, and the tail gas of the car accumulates in the air. If you turn on external circulation, these harmful gases may be inhaled into the car, which will cause great harm to our body, The same is true when passing through some sections with serious air pollution.