Dyson Unveils His Bladeless Fan (w/ Videos)
October 14, 2009 by John Messina
Using 'Air Multiplier' technology, air is pushed forward, dragging air from behind and from the sides.Without rotor blades, a smooth airflow is created.
(PhysOrg.com) -- James Dyson, inventor of the bag-less vacuum cleaners has taken his invention one step further with the unveiling of the bladeless fan. Using 'Air Multiplier' technology the bladeless fan pushes 119 gallons of air per second.
Unlike conventional fans that rely on fan blades to chop the air and push it forward, the bladeless fan technology uses an airflow principle modeled after an airplane wing.
Air is pulled into the machine's cylindrical base using a small brushless motor. The motor's impeller pushes air into a hollow ring and is then forced out a slit that runs all around the ring. The air is then accelerated into the circular chamber which is called a loop amplifier. The video below illustrates the airflow technology.
There are several advantages in using the 'Air Multiplier' technology:
• Since there are no visible moving parts there is no need for a safety grill. This also makes it safe around small children.
• Cleaning is greatly reduced.
• Runs on a small brushless motor.
• Airflow is regulated with the use of a dimmer switch.
In an interview with Dyson, he said: "I've always been disappointed by fans. Their spinning blades chop up the airflow, causing annoying buffeting. They're hard to clean and children always want to poke their fingers through the grille. So we've developed a new type of fan that doesn't use blades."
More information: For detailed information on the design and how the bladeless fan works, visit the Dyson website.
© 2009 PhysOrg.com
Apr 30, 2009 |
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It seems to use a pump (in the base) rather than blades. In addition to smoothing airflow, which would be useful in industrial tasks where you want to dry a substance without disrupting it, I would wager that it would make the fan quieter because the pump could be sheilded in the base whereas sheilding the central motor of a fan risks making it top heavy.
Sorry, my mistake - it is a "rotor" rather than a pump but it would be smaller than a full size fan blade.
I'm surprised to hear that. Have these been on the market long? If so, why are people buying them if they are so loud and if not, where did you get to see (hear) one?
Sort of. I have seen articles about a new windmill design that uses a couple of similar wing shaped cylinders cowls to concentrate and accelorate the wind through a smaller blade.
Funny how good ideas often get issolated in one field until they are rediscovered in another.
There is no way this fan would be as anywhere near as eff as a prop fan. I could make a 6" regular fan blow it's doors off.
It will sell though as art.
Really? I thought this was alright since it was a rotorless and apparently silent fan. But if it still makes noise then its completely useless.
but the final power required for propelling air needs to be given by fan in base. it will require small but powerful fan.(which may create noise)
cleaning of dust caugth inside air chamber will be biggest difficulty.
also water in air may condence near vents as it happens on airplane wings
still-it is a technological advancement
hope to see cheaper versions hit the market soon.
given that and the fact you have no dangerous voltages or fan blades for little fingers to touch I think this has excellent commercial viability.
Really? it did not sound any louder than any other fan I have seen.