Copyright
© Françoise Herrmann
Hot!
Hot! Hot! You have probably seen those very elegant bladeless Dyson fans called
air-multipliers. There are in fact many
patents associated with this brilliant invention. The Dyson bladeless fan produces a gentle
airflow, with none of the choppiness and turbulence associated with blades. It is both safe (you can stick your hand straight through the hoop generating
the airflow), and very energy efficient (at 40 watts compared to 2500 watts for
an air conditioner).
Dyson
patents, associated with the air-multiplier bladeless fan, cover the special
components of the fan: the nozzle and airflow system (GB2452490),
the tilting mechanism (GB2468315), the adjustable surface for control of airflow (GB2486749),
air changing means (GB2493231), as well as variations
of the assembly and fan, such as a ceiling mounted bladeless fan (WO2012085527) or a bladeless fan for including ionizer (GB24999041),
a bladeless fan with electrostatic precipitator (GB2499044), a bladeless fan with removable nozzle (GB2500008), a bladeless fan with a tapering nozzle (GB2496464),
plus more patented variations and components.
Below
you will find the Abstract for one of the bladeless fan patents, GB2502106, titled
Bladeless fan, a patent drawing of the fan, and an image of the marketed product. A 3-minute YouTube video of Sir James Dyson explaining his air-multiplying
invention is also included.
Abstract
GB2502106
A fan for generating an air current
includes a body 12 having an air inlet 14, and a nozzle 18 connected to the body.
The nozzle includes an interior passage 42 and an air outlet 20 from which the
air flow is emitted from the fan. The interior passage extends about an opening
or bore 32 through which air from outside the nozzle is drawn by air emitted
from the air outlet. The body includes a duct 60 having a first end defining an
air inlet 62 of the duct and a second end located opposite to the first end and
defining an air outlet 64 of the duct, an impeller 70 is located within the
duct for drawing the air flow through the duct, and a motor 94 for driving the impeller.
A diffuser section of the duct is annular in shape and converges towards the outlet
end of the diffuser. The cross-sectional area of the diffuser varies along the diffuser
section by no more than 20% of the crosssectional area of the air flow path at
the inlet of the diffuser.
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NB. Errata: Sir James Dyson was knighted in Great Britain according
to the Queen’s 2006 New Year’s Honours List, which explains the honorary form
of address “Sir” in this post, and errata in my previous posts concerning Dyson
inventions.
For
a biographical note: Sir James Dyson trained as an artist prior to training as
an engineer. His first invention “the ballbarrow” is reviewed in Patents on the soles of your shoes on 3/23/2013 in a post titled: Oh, patents! The Ballbarrow. His
famous wind tunnel vacuum cleaner came four and half years later after 5,127
prototypes! The secret of the Dyson design and Dyson engineering firm, valued
at 1 billion dollars, according to Sir James Dyson, in a BBC News article:
(Dec. 2006) is: “Making things people
want to buy”.
That’s
for sure!...
References
- Oh,
patents! The Ballbarrow. Patents on the soles of your shoes - March,
23, 2013 http://tinyurl.com/ns33aav
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