The specific method is: to place the electric fan at a distance of 0.5~2.1 meters from the window and then blow against the open window to cool the room.
When the electric fan blows out of the window, it will form a low-pressure zone with high velocity, and the relatively static air outside the window will flow into the room because of the high pressure.
At the same time, because the air in the room is also blown out, the indoor area has become a low-pressure area, and the outdoor high-pressure air will be constantly sucked in to supplement.
This makes the indoor and outdoor air continuously circulate.
The fresh and cool air from the outside constantly enters the room, replacing the dull air in the room, greatly promoting the circulation of air, which also brings us a cool and light feeling.
This is why the fan blows out, but you can feel the room is cooler.