U.S. patent application number 12/590103 was filed with the patent office on 2011-05-05 for ceiling fan.
Invention is credited to Anandvishnu T. A., Aparna T. A., Vijayan Thirumalai Anandampillai.
Application Number | 20110103982 12/590103 |
Document ID | / |
Family ID | 43925639 |
Filed Date | 2011-05-05 |
United States Patent
Application |
20110103982 |
Kind Code |
A1 |
A.; Aparna T. ; et
al. |
May 5, 2011 |
Ceiling fan
Abstract
The invention is an improved ceiling fan for cleaning polluted
air. A fan rod (1) has upper clamp. for roof and a lower motor (2).
The motor has a ring (3) supported on radial arms (4) fixed to the
motor (2). The ring has multiple smaller blades (5) for more air
sweeping. A woven or nonwoven washable filter fabric (6) with
needed pores mounted on radial rods (7) fixed to a clamp (8) on the
fan rod (1) forms air purifying canopy above the motor and blades.
The motor is modified with a lower weight plastic casing with heat
radiating holes (18). More number of blades with lower weight motor
gives more air for same power. Ionizer (14) is fixed to fan rod
(1). Water bottle (15) with wick (16) spreading water on an
evaporating sponge (17) spread above the filter cools air in hot
summer for cool healthy air.
Inventors: |
A.; Aparna T.; (Chennai,
IN) ; A.; Anandvishnu T.; (Chennai, IN) ;
Anandampillai; Vijayan Thirumalai; (Chennai, IN) |
Family ID: |
43925639 |
Appl. No.: |
12/590103 |
Filed: |
November 2, 2009 |
Current U.S.
Class: |
417/423.9 |
Current CPC
Class: |
F24F 7/007 20130101;
F24F 6/16 20130101; F24F 1/0007 20130101; F04D 29/70 20130101; Y02B
30/545 20130101; F04D 25/088 20130101; Y02B 30/54 20130101 |
Class at
Publication: |
417/423.9 |
International
Class: |
F04B 17/03 20060101
F04B017/03 |
Claims
1. An improved electric ceiling fan with a fan rod(1)having an
upper roof clamp and a lower motor(2), the said motor has radial
arms(4) with a ring(3), the said ring(3) having larger number of
smaller blades (5) fixed, the said fan rod has a washable filter
fabric (6) mounted on rods(7) of the clamp(8) fixed to the fan
rod(1) above the said blades and motor, the said filter fabric
trapping dust for a clean air.
2. An improved electric ceiling fan as claimed in claim 1, wherein
the filter fabric(6) is a woven or nonwoven washable plastic mesh
with needed small pores to filter the dust with clean air flow, the
said fabric is fitted on supporting radial rods (7) for easy
removal and refitting for years of use.
3. An improved electric ceiling fan as claimed in claim 1, wherein
the said ring (3) has two or more radial arms (4) to fix to the
said motor casing by screws at the inner end, the said ring having
many blades(5) fixed firmly for air circulation.
4. An improved electric ceiling fan as claimed in claim 1, wherein
the blades (5) of chosen size and air cutting edges are fixed to
the ring firmly for years of air circulation.
5. An improved electric ceiling fan as claimed in claim 1, wherein
a water bottle (15) with a wick(16), is fixed to stator rod
bottom(13), the said wick lifts water by capillary to a evaporating
sponge(17) for real cooling, the said sponge being spread above the
said filter cloth(6).
6. An improved electric ceiling fan as claimed in claim 1 wherein
the said ionizer(14) is attached to the fan rod(1) or the lower end
of stator rod(13) and connected to electrical circuit for healthy
negative ions
7. An improved electric ceiling fan as claimed in claim 1 wherein
the motor(2) has an upper(9) and lower (10) plastic(lower weight)
casing with the inner stator and rotor, the said casing has
threaded holes for radial arms (4) screws, the said casing having
holes (18) for motor cooling.
Description
TECHNICAL FIELD
[0001] This invention in general relates to electric fans. More
particularly this invention relates to a pollution decreasing
electric fans with no extra power saving on pollution diseases and
energy.
STATE OF ART
[0002] Existing electric fans are ceiling fans hung from roof or
table/wall/pedestal/exhaust fans--all having a motor to turn blades
for air throw. Ceiling fans have the largest sweep and largest air
flow for lowest power. The ceiling fans have a rotating motor with
3-5 blades and suspended on a fan rod hung from the roof. The
blades sweep & circulate air with dust all over room. With
increasing pollution of industrialization there is a large dust
build up with a lot of pollutants, pathogens causing asthma, TB,
cancer of lung, pneumonias & fetal death too. Existing fans are
decades old and not meant for polluted air of our cities.
Eliminating dust and pathogens saves health and money. There are no
simple fans to decrease pollution till date.
[0003] Ideal modern fans should be: 1. give more breeze for same
energy. 2. Trap and decrease dust and pollutants for healthy air.
3. Long life with minimal wear and tear of use. 4. Easy to fix, run
and use. 5. Safe and reliable. 6. Save on energy. There is no
effective pollution decreasing fans as of now. The following
description gives critical examination of the ceiling fans known in
the art. It also discusses the shortcomings of the conventional
methods. Further in order to overcome the problem associated with
fans, the invention offers the solution to overcome the impediments
in the construction and the process of using the same.
[0004] Constraints in all existing ceiling fans are as follows:
[0005] 1. None has effective pollution decreasing attachments.
[0006] 2. Only the outer half of the blades sweep air, not the
whole length of blades. [0007] 3. Filters are now attached to top
of blades, stressing the blades with difficult cleaning. [0008] 4.
The number of blades attached to the motor is few- three to six.
[0009] 5. There is no economic, efficient use of energy. [0010] 6.
There is no cooling but air circulation wellness. Actually, the air
is hotter in summer & colder in cooler months.
[0011] Accordingly the object of the invention is to identify the
problem associated with the conventional ceiling fans. An extensive
search has been carried out using the Internet and related patent
specifications were studied for fans with air filtering. The
present invention is radically different, with better air flow,
dust decrease and cooling too
[0012] U.S. Pat. No. 4,840,650 of Matherene Elmer has a box with
filter attached to top of blades by a clamp. Rotating this blade
attached box stresses the blades & is inefficient U.S. Pat. No.
3,126,263 of L. Schwab titled "Gas Deflecting and Filtering"
discloses a fan having filter material which is rotated and through
which air passes. As shown in figures, the filter material not only
covers the rotating vanes, but also the space between them thereby
presenting the appearance of a rotating disc. It would be
impractical to cover the multiple blades of a ceiling fan with one
large circular disc as described.
[0013] U.S. Patent No. 3,347,025 of M. Wiley titled "Air
Circulation System" and U.S. Pat. No. 3,577,710 of E. I Feldman
titled "Air-Treatment Apparatus" both disclose fans having their
air passages covered by stationary filter elements. Again, for the
reasons cited above, to place a stationary filter material either
above or below the rotating blades would not only be cumbersome,
but would also significantly reduce the circulating effect. U.S.
Pat. No. 4,422,824 issued to C. A. Eisenhardt, Jr. titled
"Germicidal Ceiling Fan Blade" discloses a ceiling fan blade having
a hollow chamber into which a germicidal light is placed. Filtering
pads 28 thereof are installed along the leading and trailing edges
of each blade enabling air and air-borne micro-organisms to pass
into the chamber. Once in the chamber, the germicidal light
destroys any micro-organisms contained in the passing air. This
adds weight to the blades for a higher weight motor. U.S. Pat. No.
4,596,585 of D. W. Moeller, et al. titled "Method and Apparatus for
Reduction of Radon Decay Product Exposure" is an ion-generator
suspended just below the rotating blades to create special
distribution of air-borne charged ions. These ions are used to
reduce the amount of the radon decay products suspended in the
air.
[0014] U.S. Pat. No. 4,676,721 of S. D. Hardee titled "Room Air
Cleaner" and EP 196-337-A both disclose a fan whose blade surface
is covered by an enveloping filter material. As the covered vanes
rotate, the filter material traps air-borne particles. The foam
blocks of the patent need to be accurately cut so as to maintain
the critical balance of the rotating blades while the vane sock of
Hardee '721 must be tailored for each blade.
[0015] It is thus an object of this invention to provide a
practical ceiling fan filter that does not have the shortcomings
mentioned hereinabove. It is a further object of this invention to
provide a ceiling fan with a filter that is lightweight, compact,
unobtrusive, and functional.
[0016] The invention is directed to a novel type of electric
ceiling fans with a larger number of blades sweeping the effective
sweep area, with fixed filters above the motor, a water evaporative
cooling in tropics, an ionizer. For same energy, more air flow with
healthy air is a new invention.
[0017] Accordingly it is the primary object of the invention to
invent a novel pollution decreasing efficient ceiling fan, which is
unique in design and construction, working and use. Further objects
of the invention will be clear from the ensuing description.
SUMMARY OF THE INVENTION
[0018] The device comprises of fan rod with a rotating motor. The
motor has radial arms with a ring (circular) frame. The ring has
larger number of smaller blades in the effective sweep area with
low resistance but easy air cutting margins for a larger air flow.
There is a washable, detachable filter spread over the motor and
blades and fixed on the fan rod, not on the blades. The filter of
woven or nonwoven mesh traps the dust pollens, pathogens for
healthy air. Added ioniser may be placed on the fan rods for health
ions with needed electrical connections. The motor may be modified
with a lower weight but same rotor and stator by using a plastic
enclosure instead of metal. The fan has more air cutting blades
with a lighter motor body with same rotor stator weight for same
power. A water bottle with a wick connected to a spongy fabric
placed above the filter fabric cools in summer.
STATEMENT OF DRAWINGS
[0019] These and other objects and features of the invention will
become more apparent upon perusal of following description taken in
conjunction with accompanying drawings wherein:
[0020] FIG. 1 shows in elevation the details of the new fan.
[0021] FIG. 2 shows the various components.
[0022] FIG. 3 shows modification with water evaporating
cooling.
[0023] FIG. 4 shows a normal fan
DESCRIPTION OF PREFERRED EMBODIMENTS
[0024] The following specification describes salient features of
invention, the method of construction, the method of use and the
advantages of the novel invention.
[0025] Existing ceiling fans in FIG. 4 has a fan rod (1) with a
motor (2) with 3-4 blades (5) attached at the center. As the fan
motor rotates the blades rotate spreading air with dust all over
the room. There are no filters too for clean air. The air delivered
is determined by the speed of rotation and air cutting area of
blades. Only the outer half of fan produces the entire air
sweep.
[0026] The new device has a fan rod with an upper clamp for the
roof hook. At the lower end is the motor. The motor has a ring with
a larger number of blades with a higher air cutting area. A
filtering fabric is attached to the fan rod as a canopy above the
blades. An added ionizer may be clamped to the rod. As the blades
rotate the air is sucked through the filter, the dust particles are
trapped in the fabric for cleaner air. The fabric is removed to
clean and destroy the dust for reuse. There is no extra power as
the filter is stationery and not fitted to blades.
[0027] The device comprises of a fan rod (1) with a top clamp for
the roof hook. The lower end has a motor (2). The motor has a ring
(3) with radial arms (4) fixed to the motor. The ring carries a
number of plastic/aluminum blades (5) of smaller size with easy air
cutting edges. The air delivered is more as the blades are more in
number. A filter fabric (6) is spread on supporting radial rods (7)
which are fixed at the central end on the fan rod by a clamp (8).
The filter assembly forms a canopy over the blades. The fabric may
be woven or nonwoven plastic meshed fabric for reuse. The large
pores may be used for non asthmatics, smaller for severe asthmatics
to trap all the dust, pollens or pathogens. The filter may decrease
air flow but the added blades give more air for same power &
efficiency.
[0028] The motor may be modified. The motor has an upper (9) and
lower (10) plastic not metal casing with a central stator (11) and
a peripheral rotor (12). The stator has a central hollow rod (13)
fixed to lower end of fan rod (1). The stator and rotor of same
weight of existing technology may be used. Plastic casing instead
of heavy metal casing helps for energy saving. A few holes (18) in
the casing dissipate motor heat.
[0029] Added ionizer (14) may be fixed to the fan rod or at the
center of fan motor rod (13). This is connected to the fan main
circuit for releasing ions when in use.
[0030] Added cooling can be made with a plastic water bottle (15)
fitted to the lower end of stator hollow rod (13). A wick (16)
lifts water to a spongy fabric (17) spread over the top of filter
and evaporates producing the cooling. Alternately a mini pump
(extra electric power) may be used to pump water on the spongy
fabric for fast evaporation. The bottle may be screwed to lower end
of stator rod (13).
[0031] To use, the fan rod is hung on the roof hook. The filter
fabric clamp (8) is fixed to the fan rod (1). The clamp has a bolt
and nut or a tensioning mechanism for attaching to the fan rod
firmly. The radial rods of fabric, fabric are fitted to form an air
filtering canopy. The motor is fixed to lower end of fan rod. The
blade radial arms (4), ring (3), blades (5) are fixed. The
electrical fittings are connected to switches. Ionizer (14) may be
fixed to fan rod. When switched on, the motor rotates, the ring
with the blades suck air trapping dust and pollutants in air filter
fabric and circulates air with no dust. The ionizer adds healthy
ions. The clean air saves us from diseases. The filter is unclamped
washed and refitted for years of use.
[0032] The device may be modified. Two layers of filters may also
be used supported on two radial arms on the same clamp. The fabric
can carry decorative colored figures. Lights may be fixed for
decoration too on the fan rod (1) or stator rod (13). In the
cooling model, the water is filled in the plastic bottle (15) and
fixed to the stator rod (13). The wick (16) or mini pump lifts
water to the spongy evaporative fabric (17) for cooling in summer.
The filter fabric may be in two halves for easy removal or
reattaching by Velcro, zips or fasteners. The blades, ring may be
made of plastics for lower weight. Ionizers, cooling bottle may be
optional attachments. The radial rods with ring and blades are
screwed to the motor casing firmly. The blades are attached to ring
by snapping on or by screws or moulding. Two blade rings may be
used for stronger blade support too. The blades (made of plastics)
are made of needed length and air cutting margins. Plastic parts
may be injection moulded, metals cast as needed. Since fans come in
different size, the ring size, blades shape and number, the filter
size may vary for size.
[0033] It will be apparent to those skilled in the art that
modifications to the invention described herein can readily be made
without departing from the spirit of the invention. Protection is
sought for all the subject matter described herein including any
such modifications.
Advantages of the New Invention:
[0034] 1. The filter fabric is above the blades as a canopy and
traps dust allergens, pathogens. [0035] 2. The ring has more number
of blades with more air sweeping, air flow. [0036] 3. The motor
plastic encasing reduces motor weight for same rotor stator weight!
[0037] 4. Electrical Energy conversion to air circulation is more
with more air (increased blade numbers, lower motor casing weight).
[0038] 5. Life of device is more, as there are few moving parts.
[0039] 6. Evaporative cooling with water helps in summer for no
extra power. [0040] 7. Reusable washable filter fabric helps for
low cost long years of use. [0041] 8. Millions Of fans can trap
tons of dust helping a cleaning of outside air too. [0042] 9.
Filter cloth can be decorated for pleasing looks.
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