Bladeless fan! At that time, it was for the so-called silence to buy, and the result was that the sound was super large and the wind was super small! And then I did some research, your sister, plasma, technology! It is a hair dryer that uses the air pipe to produce air! There is a fan below blowing up into the hollow circle of blingbling above, and then there is a trough blowing forward in that circle, by the way, using the pressure difference between the front and the back to bring more air out!