The term “Air Multiplier” is most commonly associated with Dyson’s bladeless fan technology, introduced in 2009. It refers to the unique mechanism Dyson uses in their fans (and some heaters and purifiers) to produce a smooth, powerful stream of air without visible blades.
💨 What Is an Air Multiplier?
The Dyson Air Multiplier uses aerodynamic principles to draw in air and amplify it up to 15–18 times. This creates a cooling airflow without the buffeting caused by traditional fan blades.
🛠️ How Does the Dyson Air Multiplier Work?
- Air Intake:
A brushless electric motor pulls air in through the base of the fan. - Acceleration Through the Loop Amplifier:
The air is forced up into the hollow ring (loop amplifier), which has a slit all the way around. - Air Multiplication via Inducement & Entrainment:
- The air is accelerated through the slit at high speed, creating an area of low pressure behind it.
- This draws in surrounding air (called inducement).
- Nearby air is also pulled along by the stream due to entrainment.
- This process amplifies the total airflow without adding noise or turbulence.
✅ Advantages of Air Multiplier Fans
- Bladeless Design: Safer for kids and pets.
- Smooth Airflow: No choppy buffeting like traditional fans.
- Quieter Operation: Less noise even at higher speeds.
- Easy to Clean: No grille or blades to disassemble.
❌ Disadvantages
- Expensive: Typically priced higher than conventional fans.
- Less Cooling Effect in Humid Areas: Doesn’t actually cool the air like an AC.
- Limited Air Direction Control: Not as adjustable as some mechanical fans.
🔍 Common Devices That Use Air Multiplier Tech
- Dyson Cool Fans (e.g., AM06, AM07)
- Dyson Hot+Cool (e.g., HP series) – Includes heating and purification.
- Dyson Pure Cool (air purifiers with fan functionality)
🧠 Did You Know?
The design of the Air Multiplier is inspired by aerofoil technology used in jet engines and turbochargers.