Nowadays, ”air multiplier” are attracting attention.
Air multiplier is also called ”bladeless fan”.
The advantages are that small children do not hurt their fingers and that the wind power is constant and calm.
In fact, the blades are hidden inside the body.
The wind sent from there blows out from the small holes scattered around the top ring.
At this time, a phenomenon occurs in which a small wind entrains the surrounding air to create a large wind.
This is called the “entrainment effect” and is said to create a wind that is 15 times stronger than the original.
– Dyson: Dyson Cool Cooling Fan