Claims:WE CLAIM
1.Fully closable air outlet assembly 22 for an evaporative air cooler 10 wherein said air outlet assembly 22, located around front panel 12, comprises a horizontal louver (or air outlet) 15, vertical louver (or air outlet) 16, horizontal movement link 19 for the said horizontal louver 15, horizontal fixing link 20 and side horizontal fixing link 21; wherein components of said front panel assembly 22 are so arranged to provide closed type horizontal or vertical movement to horizontal louver (or air outlet) 15, or vertical louver (or air outlet) 16 respectively.
2. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein the air outlet assembly 22 is manually operated towards full opening and full closing of the air outlets.
3. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein in one preferred embodiment of the said air outlet assembly 22 the horizontal louvers 15 is provisioned for performing vertical (upward-downward) movement, when the horizontal movement link 19 of said horizontal louvers 15 is operated manually, particularly for the opening or closing of the air outlet(s).
4. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein in one preferred embodiment of the said air outlet assembly 22 is characterized in manually closable louver 15 or 16, when air delivery is stopped by switching Off the said air cooler 10 and vice-versa.
5. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein the most preferred embodiment of the said evaporative air cooler 10 is provisioned for accommodating at least one said fully closable air outlet assembly 22 and wherein said air cooler 10 is characterized in manually closable air outlet 15 or 16, when air delivery is stopped by switching off the said air cooler 10 and wice-versa.
6. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein the preferred embodiment of said fully closable air outlet assembly 22 is provided with the fully closable horizontal louver (or air outlet) 15 or fully closable vertical louver (or air outlet) 16; wherein further said fully closable air outlet assembly 22 is characterized in an arrangement where such an air outlet 15 or 16 is manually closed after the air cooler is switched OFF/not in use and, wherein such air outlet can be manually opened before the air cooler is switched ON again.
7. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein said fully closable louvers, either 15 or 16, operates using mechanism which can allow oscillation/swing of the louvers and at the same time which can control the angular position of such louvers by manual louver setting.
8. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein either horizontal louvers 15 or vertical louvers 16 is provisioned to be brought to a complete close position.
9. Fully closable air outlet assembly 22 for an evaporative air cooler 10, as claimed in claim 1, wherein the louvers (either horizontal louvers 15 or vertical louvers 16 is characterized it's in its manual operation towards opening before the fan motor of said air cooler 10 is switched ON and wherein said the louvers (either horizontal louvers 15 or vertical louver 16) is further characterized in its manual operation towards closing after fan motor of said air cooler 10 is switched OFF or when air cooler is not in working.
10. An evaporative air cooler 10 comprising of the fully closable air outlet assembly 22; wherein said evaporative air cooler 10 comprises:
• an evaporative air cooler body 11 which itself comprises front panel 12, back grill 13, side grill 14, top cover 18, water storage base tank 17, an evaporative cooling media, a pump to circulate water from said water storage chamber to the said evaporative cooling media, means to blow out air from within the said cooler body 11;and
• an air outlet assembly 22, preferably located on or around the front panel 12, comprising a horizontal louver (or air outlet) 15, vertical louver (or air outlet) 16, horizontal movement link 19 for horizontal louver 15, horizontal fixing link 20 and side horizontal fixing link 21; wherein components of said fully closable air outlet assembly 22 are so arranged to provide closed type horizontal or vertical movement to horizontal louver (or air outlet) 15, vertical louver (or air outlet) 16 respectively;
And wherein said evaporative air cooler 10 is characterized in manually closable air outlet 15 or 16, when air delivery is stopped by switching Off the said air cooler 10 and vice-versa.

, Description:Field of the invention:
The present invention generally relates to manually closable air outlet assembly for use in evaporative air cooler, wherein said assembly comprises of at least one fully closable air outlet(s), which are provisioned to be guided multi-directionally through the movement of horizontal and vertical louvers. The invention further relates to an evaporative air cooler wherein said air outlet(s) can manually be fully closed after switching Off the air cooler and similarly wherein said air outlet(s) can manually be opened before switching ON the air cooler.

Background of the invention:
The principles of evaporative air cooling have been exploited for several decades by people of many countries to obtain relief from uncomfortably warm environments. Air coolers are more effective in dry, hot and tropical locations. Present day air coolers typically comprise of a body, a water tank, fibre pads of different possible materials, air moving device (axial or centrifugal or cross flow fans) and water circulation system. An air moving device mounted within the body of the air cooler — with fibre pads mounted on at least one of the sides of the air cooler — blows the cool air from the air outlet(s),usually at front and/or top of the air cooler. The loosely woven fibres of the fibre pads are preferably made of hay or cellulose. In case when fibre pads are made of hay, hay wool is filled in the cotton net of the fibre pad and in the case when fibre pads are made of cellulose, the fibre pad consist of paper and special adhesive with multiple layer of corrugated paper arranged in honeycomb manner. The fibres of the pads are kept wetted using a water distribution system.
Air outlet in an evaporative air cooler is often guided by louvers placed in vertical or horizontal orientation, or both. Often, either horizontal or vertical guides (called louvers) are moveable manually. These louvers help to guide the air delivery to different directions as required by the user from time to time.
Problems associated with the prior art:
Conventionally, air outlet grills of the evaporative air cooler are always kept open, in order to allow for air to be delivered from the air cooler. Such an air cooler has no provision of closing the air outlet and the said conventional air outlet has to be kept open during air delivery. One can’t place any air filter at the air outlet, since the air velocities are usually very high and any filter would block the air delivery and substantially reduce the air pressure and will substantially affect the efficiency of the air cooler. As a result, the conventional air outlets are kept open in all the evaporative air coolers of the prior art.
When the air cooler is not in use, dust and/or insects can easily enter the air cooler through such grills of air outlets. Ingress of dust and other particles into the air cooler lead to unpleasant smell issues over a period of time.
Further, the insides of the air cooler (tank, pad) are often wet for some time after the air cooler is switched off. Hence, ingress of microbial particles and insects into the air cooler lead to further breeding ground for mosquitoes.
Many household users cover the air cooler using a cloth or suitable cover while not in use. This is cumbersome and also often does not properly close the air outlet grill.

OBJECTS OF THE INVENTION:
Prime object of the present invention is to provide fully closable air outlet assembly for use in evaporative air cooler, wherein said air outlet assembly is provisioned for manual operations towards complete closing and opening of the air outlet(s).
Another object of the present invention is to provide fully closable air outlet assembly for use in evaporative air cooler, wherein said assembly comprises of at least one fully closable air outlet(s), which are provisioned to be guided multi-directionally through the movement of horizontal and vertical louvers.
Another object of the present invention is to provide an evaporative air cooler wherein the air outlet(s) can manually be fully closed after switching Off the air cooler and similarly wherein said air outlet(s) can manually be opened before switching ON the air cooler.
Another object of the present invention is to provide an evaporative air cooler with at least one fully closable air outlet assembly, preferably manually closable air outlet, when air delivery is stospped by switching off the air cooler.
Further another object of the invention is to provide optional provision that either horizontal louvers or vertical louvers of the air outlet assembly(s) in the evaporative air cooler are fully closable; wherein such fully closable horizontal or vertical louvers are fixed to close manually when the fan (axial or centrifugal or cross-flow fan) is switched OFF.
Further, another object of the invention is to provide such fully closable horizontal or vertical louvers in the air outlet assembly(s) in the evaporative air are fixed to open manually before the fan (axial or centrifugal or cross-flow fan) is switched ON.
Further, another object of the invention is to provide such fully closable louvers in the air outlet assembly(s), operated by manually which can allow oscillation/swing of the louvers and at the same time which can precisely control the angular position of such louvers, mainly the closing position.
Further, another object of the invention is to provide such an evaporative air cooler, which prevents entry of dust and/or insects/mosquitoes inside its body and microbial breeding therein, specifically due to manually On/Off provisions of fully closable air outlet assembly(s).
Another object of the invention is to provide such an evaporative air cooler comprising of instant air outlet assembly(s),which substantially eliminates/alleviates the disadvantages associated with the conventional air outlet(s) used in the prior known air coolers.

SUMMARY OF THE INVENTION:
The present invention relates to an improved evaporative air cooler construction having a cooler body (front and side panels, top panel and bottom panel), a cooler pad assembly (adjacent to at least one of the side panels), An air moving device (axial or centrifugal or cross-flow fan), a water circulation system and a water storage tank. The air delivery in the present invention cooler is guided by a set of horizontal and vertical louvers (air guides). Both horizontal as well as vertical louvers can oscillate. Further, either horizontal louvers or vertical louvers are fully closable.
Such fully closable horizontal or vertical louvers are fixed to close manually after the fan(axial or centrifugal or cross-flow fan) is switched OFF. Further, such fully closable horizontal or vertical louvers are fixed to open manually before the fan (axial or centrifugal or cross-flow fan) is switched ON.
Such fully closable louvers are operated by manually, which can allow oscillation/swing of the louvers and at the same time, which can precisely control the angular position of such louvers, mainly the closing position.
With this arrangement, we can achieve an evaporative air cooler with much improved aesthetics and which deliver dust free, healthy and smell free air at all the times.
The air cooler of the present invention is designed to be used for the convenient cooling of any room or similarly enclosed or open space such as house, office, shop, warehouse, manufacturing location, process industry, assembly hall, restaurant etc.
This invention mainly offers the following advantages:
1) Fully closable air outlet grills, when cooler is not in use
2) Manually closing of the air outlet grills after the fan (axial or centrifugal or cross-flow fan), is switched OFF
3) Manually opening of the air outlet grills before the fan (axial or centrifugal or cross-flow fan), is switched ON
4) No ingress of dust, mosquitoes etc. when cooler is not in use
5) Dust free, smell free and healthy air delivery at all times
6) Improved aesthetics.
In some incidences, when the air cooler is placed at certain critical positions, namely at window of a room, from outside, at higher floor of a building, it becomes difficult to change the water of base tank of the air cooler at regular interval. Similarly, in some incidences, when the user stops using the air cooler and does not empty water from the base tank for few days, mosquito and microbial growth starts in the said contaminated and stationary water of the air cooler tank, which may enter into the human comfort zone through the continuously open air outlet(s).
The instant disclosure provides such an air-outlet assembly in the air-cooler, which can be fully opened manually as well as fully closed manually so that the cool air from the air cooler device, in switched on condition, can be enjoyed and in the switch-off condition, said air outlet(s) of the air cooler can be completely closed.

DETAILED DESCRIPTION OF THE INVENTION:
The invention will now be described with reference to the accompanying drawings wherein numerals are used to denote major structural components of the proposed evaporative air cooler, its fully closable air outlet assembly and the mechanism of said novel fully closable air outlet. However, it is made clear that the description and the drawings only illustrate the invention and in no way limit the same.
FIG. 1 is a schematic complete view of the proposed evaporative air cooler in its assembled form,
FIG. 2 is an exploded schematic view of the proposed evaporative air cooler illustrating the main components thereof, including the front view of the fully closable air out assembly.
In one most preferred embodiment, an evaporative air cooler 10 comprises an evaporative cooler body 11 which itself comprises front panel 12, back grill/ panel 13,side grill/panel 14, base tank 17 and top cover 18. Front panel 12 comprises the fully closable air outlet assembly 22, which is a customized component of the said air cooler 10 and is provisioned for operating manually towards: (a) its full opening manually, to allow blowing of cool air from the air-cooler 10 to the human comfort zone, preferably once the said air-cooler is made functional (switched on); (b) its full closing manually, to stop and control the air-out blow from the air cooler 10 as well as to restrict entry of any dust material or insect into the body of the air cooler 10; and (c) restricting any foul odour coming from the base tank 17 of the air cooler 10 or entry of any insect/mosquito into the room from the inner body of said air cooler 10 by keeping the said air outlet assembly 22 in completely closed position, mainly when the said air cooler 10 remains in switch-off condition for several days and the base tank 17 thereof contains some water therein.
The fully closable air outlet assembly 22 comprises of a horizontal louver15, vertical louver 16,horizontal movement link 19 for the horizontal louver, horizontal fixing link 20 and side horizontal fixing link 21 Components of said air outlet assembly 22, preferably mounted on front panel 12 of the air cooler 10 is so arranged to provide closed type horizontal movement. The side grill/panel 14, back grill/panel 13, and top cover 18 are assembled within the body of the air cooler 10 in known manner, as per the schematic representation in FIG. 2.
The preferred embodiment, as illustrated in drawings 1 and 2, comprises the arrangement of the air outlet assembly 22 and its components as controlling mechanism in such a manner that it’s horizontal louvers 15 corresponds to the proposed ‘fully closable function of the louvers (air outlets)’. Similar arrangement can optionally be done in case of closable vertical louvers too.
Said horizontal louvers 15 performs vertical movement, when its horizontal movement link 19 is operated manually, particularly for the opening or closing of the air outlet(s). Before switching on the air cooler 10, the horizontal movement link 19 is made to slide upward by manually holding its holder. Once the air cooler 10 is switched off, the user again holds the said horizontal movement link 19 at its holder and slides it downwardly. Through such manual sliding of the horizontal movement link 19 of the horizontal louvers 15, the air outlets of the air outlet assembly 22 is opened or closed partially or completely.
Further these figures show horizontal louver 15, vertical louver 16, horizontal movement link 19 for horizontal louver 15, horizontal fixing link 20 and side horizontal fixing link 21.One possible swing/oscillation mechanism is shown here only as a reference and as described below. It may be noted that variety of optional swing/oscillating mechanisms would be possible in the air cooler of the present invention.
In alternate preferred embodiment of the air outlet assembly 22 used in the air cooler 10, vertical louvers 16 can be provisioned with suitable horizontal movement link 19 therein towards complete opening and closing of the said vertical louvers 16.
In the most preferred embodiment of the air cooler 10, as shown in figures 1 and 2, the air inlets are positioned at the back and side grilled panels 13 and 14; wherein the position of the air outlet assembly 22 is provisioned at front panel 12 only as one reference. Typically, the air cooler could have one or many air inlets as well as one or many air outlets.
Referring to the figures for understanding the swing mechanism, a pip 23 embedded in the inside of the hole in the side horizontal fixing link 21, that is, each louver 15 rotated about the pip 23. This optional swing mechanism includes horizontal movement link 19, flexed on the horizontal lover 15. Said horizontal movement link 19 on the creation of a horizontal louver 15 locking pip 24 corresponding to the jack of each horizontal louver 15 locking pip 24 is movably inserted. When two louvers, getting hinged with the horizontal movement link 19 of the horizontal louvers 15, it is noted that the locking pip 24 can set the horizontal louvers 15 in the left & right side, but also it can set up in the centre or anywhere on the horizontal louvers 15 and it does not affect its function.
By doing the horizontal louver 15 up & down, horizontal movement link 19 swings up & down. As horizontal louvers 15 and horizontal movement link 19 are hinged together, bobbing up and down even when the horizontal movement link 19 drives horizontal louvers 15 to get rotated about the pip 23. The horizontal louvers 15 get completely closed or open, as per the requirement at the time of switching on or switching off the air cooler 10. The distance between locking pip 25 should ensure that it can be driven evenly when the horizontal movement link 19 drives the horizontal louver 15 to get rotated up to maximum angle, not greater than the extent required for oscillation.
A brief consideration of the above embodiment will indicate that the invention is extremely simple. The invention provides an evaporative air cooler the efficiency of which is much higher than that of prior art units.
In addition to the above mentioned embodiments, it is to be understood that various modifications and alterations with regard to the types of the materials used, their method of joining together, and the attachments, and, the shape of the air cooler, the structure of the air cooler, the shapes / dimensions / orientations of the components as describes, the absence of certain optional components as described, and/or function may be made to the disclosed embodiments by one skilled in the art without departing from the invention as defined by the claims. Accordingly, the above disclosure is not to be considered as limiting and the appended claims are to be interpreted as encompassing the entire spirit and scope of the invention.