FIELD OF INVENTION:
The present invention relates to the field of desert air cooler. The present invention more particularly relates to gear arrangement for
horizontal louver movement of air cooler.
BACKGROUND AND PRIOR ART:
Conventional technique for horizontal louver movement in air cooler used was lever system in which lever knobs were used. In this kind of technique, the louver movement was restricted upto 80 degrees only. Further, the louver movement through lever knobs
was not completely closed. In comparison to the Lever mechanism, Gear arrangement , provides smooth movement. The louver movement through lever knobs was stiff. The louver movement
could not be adjusted at smaller angles and gradual change in angle was not possible. Earlier the louvers were not completely
closed which led to the entrance of dust particles and insects
inside the cooler while the cooler was not operating thus resulting
in an unhygienic environment. Insects could easily enter the air
cooler through louvers and cooling pads. Insects forming cluster
near the cooling pads and inside the tank could become a breeding
ground for mosquitoes which was a major cause of life threatening
diseases like ~ e & u e and Malaria. The accumulation of 'dust on
the live parts such as fan motor, pump and swing motor affected
the life/performance of these parts which led to the decrease in air
.delivery and cooling. Due to accumulation of dust, live parts
required servicing again and again.
Ventilation control structures are now.-a-days provided with louver
roller mechanism as well as with gear drive system. Now, reference
may be made to the following-
Publication No. CN204007302 (U) relates to 'air inlet shutter of an
I
evaporative cooler. The novel air inlet' shutter of the evaporative
I
!
! . cooler is capable of changing the opening and closing degree of
I blades and also capable of controlling the air inlet amount. The
novel air inlet shutter of the evaporative cooler comprises a
plurality of louver blades which are arranged in parallel, a zinc
plate frame, a hand wheel type air valve actuator which is arranged
in the zinc plate frame and used for controlling the opening and
closing degree of the louver blades, blade connecting devices, and a
. . connecting rod used for connecLi11g llle blade collilecting dcviccs.
The louver blades are arranged in the zinc plate frame. The blade
connecting devices are arranged on the left side and the right side
of each louver blade. The hand wheel type air valve actuator is
connected with the blade connecting devices through the
connecting rod, a handle is connected outside the hand wheel type
air valve actuator, and a worm and gear are arranged inside the
hand wheel type air valve actuator.
Publication No. US20152 1 1296 (Al) is related to a louver roller I
system with an intermittent gear turning system, comprising a
base and a top cover, wherein a roller system and an intermittent
gear turning system are mounted on the base. The roller
mechanism is wound with ladder tapes and is in axial connection
with the intermittent gear turning system, and the roller system
and the intermittent gear turning system are driven to rotate by a
square shaft. The roller system controls horizontal rising and
falling of secondary louver blades, and the roller within t.he roller
system rotates to wind or unwind the ladder tapes thereon and
sequentially drives various secondary louver blades to rise and fall
horizdntally. When various secondary louver blades rise to a
predeterm,ined position, the intermittent gear turning system
drives a turning cylinder to rotate so as to achieve turning of all
louver blades.
Publication No. W02011162469 discloses a ,louver module, which
includes: a frame in which vertical and horizontal frames are made
of a synthetic resin which, are assembled into a rectangular shape;
an opening and closing controller assembled with one of the
vertical frames to provide torque using a worm gear. A louver unit
is made of a synthetic resin, which includes a compartment
forming an air layer inside and a plurality of louvers that are
streamlined in at least one, of the outer - surfaces thereof;
symmetrically-shaped brackets being coupled so as to have both
ends in a longitudinal direction, and a reinforcing beam which
extends in a longitudinal direction and being assembled inside the
latter; and a power transmission device including a plurality of
holders disposed at positions corresponding to the longitudinaldirectional
ends of the louvers in the vertical frames, and shafts
arrangedin pairs in each of the vertical frames.
Publication No. KR20 130032450 (A) provides a louver
openingyclosing device to set slats at an angle desired by a user,
thereby setting the amount of sunshine and an air flowing rate
depending. on situations. The louver opening/closing device
.comprises an operating unit of a knob type, a scale plate, a first
I flat gear a second flat gear, a third flat gear, a fourth flat gear, a I
I rack gear, and a pinion gear. Scales and numbers are indicated on I
I the lower part of the knob of the scale plate. The first flat gear is I
jo. in.e d to the rotary shaft of the knob and transmits torque.
The second flat gear is teeth-joined with the first flat gear,, which
includes a rotatable boss on an upper part and the third flat gear I in a lower part. The third flat gear is formed into one body with the I
second flat gear and includes a boss capable of r~tate~supporting ! I
in a lower part.; The fourth gear incl6des a boss capable of rotate- I
I
supporting in an upper part and a rotary shaft formed to be
integrated in a lower part. The rack gear is joined to the fourth flat
gear and vertically moved.
Publication No. US2009264063 (Al) relates to an air damper
assembly for regulating an air flow that includes a frame, a
plurality of elongated damper blade rotatably mounted to the
frame, and a drive system for actuating the damper blades between
open and closed positions. The drive system illcludes a gear f~edly
secured to a distal end of each of the damper blades and an
. elongated rack slidably coupled to the frame. The rack meshingly
engages the gears such that linear movement of the rack in a first .
linear direction results in rotational movement of the damper .
blades in a first rotational direction and linear movement of the
rack in a second linear direction opposite the first linear direction I
which results in rotational movement of the damper blades in a I
I
second, rotational direction opposite the first rotational direction.
Publication No. us20 102 16386'( ~ 1r)e lates to an HVAC vent I
control system. A roof panel forms a set of air vents and ports. A
vent control unit includes left and right door units mounted for
rotation on the panel. Each door unit has a louver door and a gear
piece connected thereto. The louver doors are movable to control ,
airflow through the ports. The gear pieces are in .meshing ,
engagement with' the other so that the door units operate
symmetrically with respect to each other. A control knob is coupled
to the one of the gear pieces so that rotation of the knob causes 1
rotation of the first and second gear pieces and corresponding , 1
!
movement of the left and right l.ouver doors.
Publication No. US2005252086 (Al) relates to a louvkr rotation
system for use in .rotating a louvered shutter having louvers
rotationally engaged with a frame. The device features one or a I
. I
plurality of gear modules which are positionable to a fured location
on one or a plurality of rack bars. The gear modules may be spaced
on the rack bars to any number of positions wherein they will
engage with louver 'gears from an array of louvers engaged with the
f~anieA. high degree of cusloarizatiurl is provided by allowing the
use of the rack bars with any number of different sized louvers at
different spacing& in a frame by simply adjusting the positions of
the rack modules for operative engagement with the louver gears.
Publication No. JPH039154 (A) discloses a drive unit, which is
reciprocated and engaged with each collection-dispersion object to
move a guide frame, and an endless drive chain in which one of
the large and small compound chain wheels is driven by one of the
forward and return paths of the drive unit and the other of the
chain wheels is driven by the other path. When a drive system in 1
I
an end part chain wheel is turned, a chain is started to circulate, !
and a small wheel of each compound chain wheel is turned by a
forward path in an upper side, while a large wheel ,is turned
similarly in the clockwise direction by a return path in a lower
side. In both the forward and return paths, the chain is advanced
by the same number of pitches with both the small and large
wheels and turned by the same number of teeth, and by increasing
a rotary angle in the small wheel to roll-advance the large wheel on
the chain by that amount. The larger is a difference between
. numbers of teeth in the large and small wheels of the compound
chain wheel, the larger and faster a drive unit is moved.
Accordingly, by gradually increasing the difference between the
numbers of teeth in the large and small wheels. of the compound
chain wheel successively from the right end, each drive .unit,
'uniformly holding its adjacent space, is opened and closed.
Publication No. US4527355 (A) is directed to an opening and
closing type louver device comprising a louver in which a number
of blades are arranged in a row in a required spaced relation on
rotating shafts within a frame. Each blade 'is ~peneda nd closed by
a driving system while maintaining their parallel relation.
Publication No. KR20120012075 (A) relates to a driving unit for a
louver system to open and shut a louver at a minute angle because
the louver is minutely controlled by a worm gear: A driving device
for a louver system comprises a control device, a worm gear, a
shaft device, a openingishutting device, and a shaft device. The
control device is installed in an exterior of a frame and provides a
driving force. The worm .gear is installed in the frame while
comprising the worm rotating by the transferred primitive driving
force from the control unit and a first wheel rotating by connecting
with a rotation of the worm. The opening/shutting device is
installed in the frame and comprises a second wheel. The second
wheel is axis-linked to each other while being separated from the
first wheel to be in parallel. A torque of the second wheel is
transferred to the shaft device while transferring the torque to a
plurality of louvers. . .
Publication No. US20 132 13076 (Al) discloses an evaporative cooler
including an evaporative cooler housing with a .duct extending
therethrough, a plurality of -cooler louvers with respective porous
evaporative cooler pads, and a.working'fluid source conduit. The
cooler louvers are arranged within the duct and rotatably
connected to the cooler housing along respective louver axes. In
alternate embodiments, the cooler louvers may be connected to a
single actuator through, a gear train, one or more chains and
sprockets, one or more belts and pulleys, etc.
None of the above can fulfill the. requirements of the present
invention. Hence, the present invention has been introduced.
OBJECTS OF THE INVENTION:
The principal objective of the present invention is to provide gear
arrangement for horizontal louver movement of air cooler.
Another object of the present invention is to provide the desired
angular movement of horizontal louver.
Yet another object of the present invention is to provide smooth
horizontal louver movement in air cooler.
Still another objective of the present invention is to provide
collapsible louvers to restrict the insects from entering the cooler
thus preventing mosquito breeding inside the cooler.
Another objective of the present invention is to provide collapsible
louvers .to prevent dust from accumulating on the live parts such
as fan motor, pump and swing motor
SUMMARY OF THE INVENTION:
The present invention discloses a gear arrangement for horizontal
louver movement of' a. . n air cooler comprising of a gear box
accommodating a set of gears for respective side, of horizontal
louvers, wherein said set of gears includes a driver gear, a
trarisition gear and a driven gear.
The gear 'arrangement according to the present invention
comprises of multiple radio knobs which are provided .
on one side of the cooler to change the direction of air. It provides
smooth movement of the horizontal louvers. The direction of
horizontal louvers can be adjusted even at smaller angles with the.
help of radio knobs by gradually decreasing the angle. The gear
ar~zirrgerrrerlt helps to provide angular adjustn~ei~otf louver
movement up to 105 degree through radio knob. Radio knobs are
easy to operate as compared to lever knobs and desired angular
movement can be easily achieved even with lesser force. By using
this system the horizontal louver of desert air cooler can be
. .
completely closed through radio knobs. The invention also has
provision for collapsible louver which prevents dust .and insects
from entering the cooler while not in use thus resulting in hygienic
envircinment. Collapsible louvers restrict the insects from entering ,
the cooler thus prevents mosquito breeding inside the cooler.
Collapsible louvers also prevent dust from accumulating on the live
parts thereby increasing the life of parts and limiting re- servicing
of the parts.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more
apparent from the ensuing description when read in conjunction
with the accompanying drawings of exemplary embodiments of
invention and wherein:
Figure la shows: A gear box of gear arrangement;
Figure. I b. shows: The gear arrangement for .louver movement of
air cooler according to the present invention;
Figure lc shows: The gear arrangement installed inside the front
panel of the cooler;
Figure 2 shows: Adjustment of the direction of horizontal
louvers using radio knobs; wherein both upper
and bottom horizontal louvers open at 105O.
Figure 3, 3A and 3B shows: Various angular movements of louvers
using gear arrangement in which bottom horizontal louvers
partially open (A) , bottom horizontal louvers fully collapsed at 90
degrees (B), upper Horizontal Louvers Partially Open (C) and both
uppcr and bottom horizontal louvers fully collapsed at 90 degrees
DETAILED DESCRIPTION OF THE PREFERRED
EMBODIMENTS WITH REFERENCE TO THE ACCOMPANYING
DRAWINGS
The present invention pertains to gear arrangement for horizontal
louver movement of air cooler.
Referring to the fig. la, the gear arrangement consists of a gear
box. The gear box is divided into 2 parts. Each part has 3 gears
namely driver gear- (I), transition gear (2) and driven gear (3) as
I
I shown in fig. lb.
I
As shown in fig. lb, the gear arrangement works in the following
way. Two sets of three gears are used to transmit rotation from the
axis of one gear to the ,axis of another. The teeth of a gear on one
axis mesh with the teeth of a gear on another, thus creating a
relationship between rotations of two axes. When one axis is spun,
the other will spin too thus'rotating the other gear. The teeth of
driver gear (1) mesh with the teeth of transition gear (2) thus
creating a relationship between the rotations of the two axes. As
the driver gear rotates in anti-clockwise direction (9) thus rotating
the transition gear in clockwise direction (8). The transition gear (2)
further rotates driven gear (3) in anti-clockwise direction (8). The
driver gear (1)a' nd driven gear (3)b oth rotate in the same direction ' '
while the transition gear (2) rotates in 'the opposite direction. The
axle of the driven gear is connected to the horizontal louver
actuator (7). Horizontal louver actuators (7).a re connected to the
horizontal louvers (6) through snap locking (5). When driven gear
(3) rotates, its axle transmits motion to the horizontal louver
actuators (7). It results' in the movement of horizontal louvers (6) in
up and down direction. This gear arrangement is installed inside
the front panel of the cooler as shown in fig. lc.
The motion of horizontal louvers (6) becomes smooth and easy with
the help of gear arrangement. Referring to the fig. 2, the direction
of horizontal louvers can be adjusted even at smaller angles by
means of radio knobs (10) connected to gear arrangement and
louver by gradually decreasing the angle. Radio knobs (10) are
user-oriented. User can easily change the direction of louvers by
sliding the radio knobs in upward or downward direc'tion.
Now, reference may be made to the fig. 3. With the use of gear
arrangement, the louver movement can be adjusted upto 105
degrees as compared to upto 80 .degrees only in prior art. Further,
the collapsible louvers can address the issue of dust and insects
unlike prior art. Louver movement through gear arrangement is
fast and highly efficient (losses in precision-made, welllubricated
drives are '1-2 percent and under especially favorable
conditions, 0.5 Gear arrangement is well equipped with
self-lubrication thus resulting in longer life and reliable operation.
Gear arrangement reduces load on shafts and the load remains
concentrated on the inner gears. This enables the shaft to move
the louvers smoothly leading to ease in movement of the louvers.
Thus, the invention constitutes an excellent ventilation control
system. Horizontal louver movement is achieved through gear
arrangement. The louvers move smoothly thus reducing load on
the shafts and the load remains concentrated on the inner gears.
This prevents louvers from deviation. The horizontal louvers are
arranged'.parallel in the frame. The horizontal louvers and frame
a n "- - r *-..*. -..- - A". ---. --4 .. " . - - - - L - -. - - . - . - . - - .. - .- . .- . ... . .- - - -. . . - , .- . .- - - - .- . . . .. .. - ,- ..- - .-
are preferably made of any polymer of plastic without restricting
scope of the invention to the same. Thus, other materials readily
apparent to a person skilled in the art are understood to be within
perview of thc invcntion. The louvers are connected in the frame
with the help of snap locking. The axle of the driven gear is
curlrlected to the horizontal louver actuators which are provided on
both left and right sides. Said horizontal louver actuators are
connected to the horizontal louvers through snap locking. Radio
knobs are arranged in the frame to change the opening and closing
degree of louvers.
~umero'us modifications and adaptations of the system of the
present invention .will be apparent, to th.ose skilled in the art, and
thus it is intended by the appended claims to cover all such
modifications and adaptations which fall within the true spirit and
scope. of this invention.

WE CLAIM:
1. A gear arrulgernent for horizontal louver movement of an air cooler comprising of a gear box accommodating a set of gears
for respeche side of horizontal louvers, wherein said set of
gears includes a driver gear, a transition gear and a driven
gear.
2. A gear arrangement for horizontal louver movement of an air
cooler as claimed in claim 1 wherein one set of the gears is
provided for upper horizontal louvers and another set of the
gears is provided for lower horizontal louvers.
3. A gear arrangement for horizontal louver movement of an air
cooler as claimed in claim 1 or 2 wherein the gear
arrangement is installed inside the front panel of the.cooler.
4. A gear arrangement for horizontal louver movement'of an air
cooler as claimed in any of the preceding claims wherein the
, driver gear meshes with the transition gear.
5. A gear arrangement for horizontal louver movement of an air
cooler as claimed in any of the preceding claims wherein the
driver gear rotates in one direction providing rotation .of
, transition gear in opposite direction, wherein transition gear
further rotates the driven gear in the direction of the driver
gear.
6. A gear arrangement for horizontal louver movement of an air .
cooler as claimed in any of the preceding claims wherein the
axle of the driven gear is connected to the horizontal louver
actuator.
7. A gear arrangement for horizontal louver movement of an air
cooler as claimed in.any of the. preceding claims wherein the
horizontal louver actuators are connected to the horizontal
louvers through snap locking.
8. A gear arrangement for horizontal louver movement of an air
cooler as claimed in any of the preceding claims wherein the
driven gear actuates the horizontal louver actuators for
movement of horizontal louvers in up and down direction.
9. A gear arrangement for horizontal louver movement of an air
cooler as claimed in any of the preceding claims wherein the
direction of horizontal louvers are adjusted by sliding the
radio knobs connected to the gear arrangement and louvers in upward or downward direction, in which the louvers are collapsible louvers.
10. A gear arrangement for horizontal louver movement of an air cooler as claimed in any of the preceding claims wherein the louver movement is adjustable upto 105
degrees.