- Dyson’s bladeless fans use entrainment to multiply airflow by pulling in air from the room.
- New formats like Cone and Star nozzle designs make fans smaller but just as powerful.
- Cone models use the Coanda effect to direct airflow without needing to rotate.
- Some Dyson models are designed purely for cooling, while others focus on air purification.
Dyson has always been known for taking everyday household technology and turning it into something extraordinary. Its bladeless fans have been puzzling people for years because they seem to push out a powerful stream of air without any visible blades.
Sophie Harold, who works as an acoustics and vibration engineer at Dyson, shared insights about how these futuristic-looking devices work. What she revealed is a mix of clever design, smart use of science, and a whole lot of innovation.
The Secret Behind the “Air Multiplier” Effect
Dyson’s bladeless fans are often referred to as Loops, Amps (short for Air Amplifiers), or even Race Tracks within the company. The loop design is the traditional format most people recognize. At first glance, it looks like the device is magically pulling air out of nowhere, but the secret is something called entrainment.
According to Harold, the loop has a gap in the middle and slots on the side. Fast-moving air passes through the outer plastic frame, which then pulls in surrounding air from the room. This combined flow is what Dyson calls air multiplication.
To put it simply, the motor generates some airflow, but the clever design drags in even more air from the rest of the room, multiplying the effect. That is why when you place a Dyson fan on a desk, the breeze you feel is more than what the motor alone could create.
Compact Cones and New Shapes
Dyson has not stopped with the loop design. Some of its newer air purifiers have shifted to what is called a Cone format. Instead of a hollow center, the cone looks like a bowl. This change makes the devices more compact and in some cases more powerful without having to grow in size.
The Dyson Purifier Big+Quiet is one example that uses the cone design. The shape allows it to control the air without needing to physically oscillate like a loop fan. Instead, it relies on something called the Coanda effect, the same principle used in Dyson’s Airwrap hair tool.
The airflow clings to the surface of the cone, which directs the stream upward or downward. That means the fan can change the direction of the air simply by adjusting the strength at the top or bottom, giving users a smooth, adaptable breeze.
The Star Nozzle: Dyson’s New Experiment
Dyson’s latest compact air purifier, the HushJet Purifier Compact, introduces yet another design. Instead of a loop or cone, it uses what the team calls a Star nozzle. The star shape is not just for looks. It bends the airflow in a way that pulls in surrounding air, creating entrainment just like the loop but without needing the large open center.
Harold explained that the bending edges of the star encourage nearby air to join the jet, making it both fast and powerful. The result is a compact machine that performs like a much bigger device. It has been compared to a jet engine or the concentrator nozzle on a hair dryer because of how it accelerates the airflow.
The star nozzle also ensures that the air mixes efficiently with the room environment, helping purify more quickly while remaining relatively small in size.
Fans and Purifiers: Different Goals, Different Designs
Not all Dyson fans are purifiers, and not all purifiers are designed to work like personal fans. Harold explained that the design focus depends on the purpose of the product.
For purifiers, the priority is to circulate and mix the air in the entire room while pushing it through high-quality filters. The goal is cleaner, healthier air, not necessarily a direct stream of cooling airflow at your face.
For fans like the Dyson Cool CF1, the focus shifts. These models do not include filters, which allows the motor to run more efficiently with lower costs. This design delivers a strong, targeted stream of air for personal comfort without the added resistance of filtration.
This split in design thinking is what makes Dyson’s product lineup so diverse. Whether you want a cool breeze at night or a purifier that works quietly in the background, the company has a format for it.
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