How Do Bladeless Fans Work?

How do bladeless fans, such as those made by Dyson, work? 

Back In 2009, Dyson, which is a British tech manufacturer, released a new product called the Air Multiplier. This was a fan that was quieter and safer than others. Safer because it had no fan blades

How Do Bladeless Fans Work? 

How does this work? How can a fan with no fan blades be a fan?

The airflow process starts with air flowing through slots at the base of the fan assembly. Inside the base is a small brushless electric motor that runs a tiny fan. This fan has asymmetrically aligned blades. The fan pushes air through a set of stationary blades that smooth the airflow.

This air is then directed up to the hoop-like tube at the top of the device where it’s forced out of a circular narrow slit running around the hoop. Originally it was a hoop at first, though more modern and bigger editions of this fan, the bladeless tower fans, are more of a long oval shape.

At the base of the hoop, the passage is wide. As it nears the top of the passage it narrows, squeezing the air and accelerating it. This is the first point at which air is multiplied. You will also notice, if you look at one of these fans, that the hoop is curved, like how the wing of an aircraft is. 

This means that the air around the hoop is also vacuumed, sucked through, the hoop – thanks to a principle of fluid dynamics- something known as an inducement. Basically, the air behind the tube is pulled along with when air from the fan.

Whatever the shape, circular or oval, they all work in the same way with air coming out of the small slit that goes around the circular or oval loop. This is also the element of the fan that turns if you have that motion set.

You can control the speed of the fan inside the unit which in turn controls the amount of air being pushed out of the fan.

Why use a bladeless fan? 

The main benefit to a bladeless fan is that there are no moving external parts. As such they are very safe, with little risk of injury. No fan blades mean you can’t put anything in them.

A major appeal to bladeless fans is that they require no moving parts, apart from the motor itself. They also do not require airflow channels for the air to pass through, and therefore have no sharp edges or other components where blades could potentially be attached.

Would You Buy A Bladeless Fan?

Really, this is a question you can only ask yourself. Personally, my answer is yes. A bladeless fan is something I had been looking to buy for some time, and I am happy with mine. I would happily recommend it to others.

The main thing I like about these bladeless fans is their safety. There is the potential for them to be easily used by children in a safe manner. They cannot be operated by little fingers getting caught up in the blades.

There also models that can push cold or hot air meaning they can be used all year round. I would say that this can be a good option if you live in a place where the temperature is quite temperamental.

There are some common annoyances with bladeless fans, however. Without blades, you cannot have the breeze that you’d get from an ordinary fan. This means no air movement or any cool breezes to play with your hair – if you like that cinematic look for your photos.

It’s also hard to judge how well these fans work because there is no guarantee about how much air they push out or their noise level.

All this aside, I would still recommend bladeless fans.

Note: This post is not a technical breakdown on how a bladeless cooling fans works, more a laymen’s terms breakdown. If you are really interested in the mechanics there are a number of good sources. Check out the video below as a starting point:

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