There is a radiator in the front of the car, and there will be 1 or two fans behind the radiator. People take it for granted that this fan can freeze the cooler and cool the liquid to a certain extent when passing through the radiator, but in fact, this fan does not blow the radiator, but drives the air in front of the radiator to suck it in through the wind in the engine room, so that it can absorb heat when the engine rotates at high speed.
Using the temperature difference between the inside and outside of the car to reduce the temperature The reason why the fan installed behind the radiator at the front of the car can cool the engine is actually because the temperature difference between the inside and outside of the car has a certain deviation, so that the convective wind blowing in at high speed is very strong, and the fan itself can't beat it. Such a strong airflow, but when the fan blows inward, can use the low temperature outside the car to quickly dissipate heat at low speed, especially when the car is driving at medium and high speed, the wind dispersion is completely static.
The engine is connected with a generator to drive more. In fact, the engine is connected to the generator in the car, and the generator has been generating electricity. Many people also think that this power can be used, but in fact, there is a certain driving aperture inside the generator. When this circle is in a bright state, the power generation will be adjusted. When the power demand of the car increases, the current that the generator can adjust will also increase. The faster the engine runs, the greater the driving force is, and the running speed of the fan is almost very slow, but it can also reduce the temperature of the wind blowing in the fan to some extent.
The working principle of the cooling fan is mainly exhaust, and the pushing resistance is probably the working principle of the cooling fan, which is mainly used to pull the wind out of the engine compartment, and then the resistance can be further pushed away during driving. Many people mistakenly think that he uses a blower as a pre-cooling device to cool the water temperature in the water tank, but this common sense is wrong. Cars need to overcome certain resistance, especially wind resistance. Under the action of gravity, society is surrounded by cars. At this time, in order to push away this gravity, a fan is needed to blow air in to reduce the loss of the car, and then the airflow can go backwards, and the car can start smoothly.
In short, the wind direction of the cooling fan in the car is actually blowing inward. Because the wind resistance is static, backward blowing actually sucks air out of the engine compartment, and then forms turbulence, which leads to a fixed airflow and has a certain cooling effect, which can make the car drive at a constant speed safer.