What does Dyson air multiplier look like? What is the principle?

The structure of air multiplier is very similar to Toshiba patent. The fan blades built in the base send air into the hollow ring, and the air is supplied through the gap provided in the ring. The circular cross section of the air multiplier is similar to the shape of an airplane wing, and the coanda effect and the same effect as the wing lift are used to improve the air volume. Toshiba's patent also has a similar description: "The wind in the gap can drive the surrounding air, so the air supply volume is greater than the air intake volume."