Why Bladeless Fans Are a Lie

Bladeless fans, despite their name, contain hidden blades in the base that push air upwards. The air is directed through a ring, creating a low-pressure zone that draws in surrounding air, a process known as inducement. Additionally, entrainment occurs as the air stream pulls in more air, making the fan highly efficient. The bladeless design is more about aesthetics and safety, as the actual mechanics involve conventional fan principles.

What is the main reason bladeless fans are not truly bladeless?

• They use a different type of blade.

• They are powered by magnets.

• They use hidden blades in the base.

• They rely on external wind sources.

How does Bernoulli's principle contribute to the functioning of bladeless fans?

• It increases the speed of the fan blades.

• It enhances the durability of the fan.

• It creates a zone of low pressure inside the ring.

• It reduces the noise produced by the fan.

What is the effect of inducement in bladeless fans?

• It pulls air from the center of the fan.

• It reduces the power consumption of the fan.

• It increases the temperature of the air.

• It changes the color of the fan.

What role does entrainment play in the operation of bladeless fans?

• It helps in cooling the fan motor.

• It drags surrounding air along with the main stream.

• It reduces the fan's noise.

• It stabilizes the fan's base.

How much more air can a bladeless fan blow compared to what it takes in?

• 30 to 40 times more

• 10 to 20 times more

• 5 to 7 times more

• 2 to 3 times more