DESC:TECHNICAL FIELD
[001] The embodiments herein generally relate to cooling appliances and more particularly, to a window mounting type air cooler which uses indirect-direct evaporative cooling system for cooling air.

BACKGROUND
[002] Evaporative air cooler is a device which cools air through evaporation of water and are commonly used in homes, offices and hot or dry air environment. A typical evaporative air cooler has a water pump that applies water to one or more evaporative cooling pads and a fan or blower that blows ambient air over the evaporative cooling pads. The air evaporates the water in the evaporative cooling pads and thus removes heat from the air through evaporative cooling. The cool moist air is then delivered to users in room or other conditioned space through air vents of the air cooler. Conventional domestic air cooler uses a single stage direct evaporative cooling system which is not efficient enough and has “wet bulb depression” (WBD) efficiency of @ 60 ~ 90 % in high humidity areas thereby limiting the cold air flow from the air cooler to user. The single stage direct evaporative cooling system of the domestic air cooler is not capable of cooling air without addition of humidity that makes occupants uncomfortable. Further, the air throw from the air coolers is not high such that the users who are away from the air cooler may not receive the required cold air therefrom. Further, in the conventional domestic air coolers, the blower (fan) is mounted just behind the air throw grill, so the user is directly exposed to the acoustic noise of the running blower thereby resulting in irritation to the user and is undesirable. Most air coolers are movable trolley type air coolers or tower type air coolers. For example, the air coolers are placed on stands or tables or raised platforms. Some air coolers are mounted on wall. The wall mounted air cooler may not provide desired cool air to the user(s) if the air cooler is not mounted onto the wall at a desired height or the user is not within the required distance from the air cooler. Furthermore, it typically takes conventional evaporative air coolers a time to begin cooling air because the filter device must soak up water from the reservoir before the cooling process can begin. In other words, conventional evaporative air coolers do not instantly produce cooler air.
[003] Conventional domestic air conditioners does not use two stage cooling or single stage evaporative cooling, instead the domestic air conditioners uses vapor compression based cooling. Conventional air conditioners require a room with closed doors and windows for getting cooling affect. Therefore, there is no continuous circulation of fresh air. Further, the air conditioners consume higher electrical energy and are not capable of running on inverter.
[004] Therefore, there exists a need for an air cooler, which obviates the aforementioned drawbacks.

OBJECTS
[005] The principal object of embodiments herein is to provide an air cooler which uses indirect-direct evaporative cooling system for cooling air.
[006] Another object of embodiments herein is to provide a domestic air cooler.
[007] Another object of embodiments herein is to provide an air cooler which uses dry air and moist air evaporative cooling system.
[008] Another object of embodiments herein is to provide a window mounting type air cooler.
[009] Another object of embodiments herein is to provide an air cooler which has better cooling efficiency.
[0010] Another object of embodiments herein is to provide trolley type air cooler which uses indirect-direct evaporative cooling system for cooling rooms.
[0011] Another object of embodiments herein is to provide tower type air cooler which uses indirect direct evaporative cooling system for cooling rooms.
[0012] Another object of embodiments herein is to provide an air cooler having air throw enhancing member (nozzles) in a front fascia (front grill) for increasing air throw of the air cooler.
[0013] Another object of embodiments herein is to provide an air cooler with a two stage evaporative cooling, i.e., indirect and direct evaporative cooling system.
[0014] Another object of embodiments herein is to provide an air cooler which is capable of cooling air without addition of humidity when it uses indirect evaporative cooling.
[0015] Another object of embodiments herein is to provide an air cooler which uses a multi stage evaporative cooling (indirect and direct evaporative cooling system) in which the wet bulb depression is greater than 90% in hot and dry climates thereby capable of achieving superior cooling with air conditioner feel.
[0016] Another object of embodiments herein is to provide an air cooler which has air throw enhancing member (nozzles) connected to vertical louver for improving air throw and also for saving space in grill area.
[0017] Another object of embodiments herein is to provide an enclosed air cooler that reduces the effect of acoustic noise experienced by the user.
[0018] Another object of embodiments herein is to provide a domestic air cooler which consumes electrical energy which is comparable with existing air coolers and lower than existing window air conditioners.
[0019] Another object of embodiments herein is to provide a domestic air cooler which is capable of running in power outage situations using sources like household inverters.
[0020] Another object of embodiments herein is to provide an air cooler which has reduced noise characteristics by placing an air intake blower (fan) away from the air throw grill and towards the rear end of the air cooler.
[0021] These and other objects of embodiments herein will be better appreciated and understood when considered in conjunction with following description and accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF DRAWINGS
[0022] The embodiments are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0023] Fig. 1 depicts an exploded view of an air cooler, according to embodiments as disclosed herein;
[0024] Fig. 2 depicts a cross-sectional view of the air cooler, according to embodiments as disclosed herein;
[0025] Fig. 3a depicts a perspective view of the air cooler showing coolant feeding system, according to embodiments as disclosed herein;
[0026] Fig. 3b depicts another perspective view of the air cooler showing coolant feeding system, according to embodiments as disclosed herein;
[0027] Fig. 4 depicts a perspective view of a base of the air cooler, according to embodiments as disclosed herein;
[0028] Fig. 5 depicts a perspective view of the air cooler showing the sealing members, according to embodiments as disclosed herein;
[0029] Fig. 6a depicts another cross-sectional view of the air cooler, according to embodiments as disclosed herein;
[0030] Fig. 6b depicts a detailed view of the cross sealing member between a first air cooling module and the base, according to embodiments as disclosed herein;
[0031] Fig. 7a depicts a cross sectional view of the air cooler showing the sealing members between the top cover and the first and second air cooling modules, according to embodiments as disclosed herein;
[0032] Fig. 7b depicts a detailed view of the sealing member between the top cover and the first and second air cooling modules, according to embodiments as disclosed herein;
[0033] Fig. 8a depicts a perspective view of the air cooler being mounted to a wall of indoor room, according to embodiments as disclosed herein;
[0034] Fig. 8b depicts a bottom view of a bottom portion of enclosure, according to embodiments as disclosed herein;
[0035] Fig. 9a depicts a perspective view of the top cover, according to embodiments as disclosed herein;
[0036] Fig. 9b depicts a cross sectional view of the top cover and enclosure showing the air outlets, according to embodiments as disclosed herein;
[0037] Fig. 10a depicts a exploded view of horizontal louvers, vertical louvers and air throw enhancing member, according to embodiments as disclosed herein;
[0038] Fig. 10b depicts a perspective view of horizontal louvers, vertical louvers and air throw enhancing member in assembled condition, according to embodiments as disclosed herein;
[0039] Fig. 11a depicts a perspective view of the air throw enhancing member, according to embodiments as disclosed herein;
[0040] Fig. 11b depicts cross sectional view of the air throw enhancing member, according to embodiments as disclosed herein; and
[0041] Fig. 12 depicts a perspective view of the first air cooling module, according to embodiments as disclosed herein.

DETAILED DESCRIPTION
[0042] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0043] The embodiments herein achieve a window mounting type air cooler which utilize indirect direct evaporative cooling system for cooling indoor air. Referring now to the drawings Figs 1 through 12, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0044] Fig. 1 depicts an exploded view of an air cooler (100), according to embodiments as disclosed herein. In an embodiment, the air cooler (100) includes a base (102), a drain plug (103), an enclosure (104), an enclosure front strip (104FS), an enclosure rear strip (104RS), an air cooling system (106), a plurality of longitudinal sealing members (107LA, 107LB, 107LC, 107LD), a plurality of cross sealing members (107CSA, 107CSB), a plurality of vertical sealing members (107VSA, 107VSB), a top cover (107TC), an air intake blower (108), a blower housing (109H), an air filter (109F), an air blower control knob (109K), a blower switch cover (109C), a coolant feeding system (110), a pump control switch (111S), a pump switch cover (111C), a plurality of vertical louvers (112), a plurality of horizontal louvers (114), an air throw enhancing member (116), a front fascia (118), a cool and swing control knob (120), a coolant inlet flap (122), a humidity control knob (124), a coolant level indicator (126) and a humidity control valve (128). In an embodiment, the air cooler (100) is considered to be a window mounting type air cooler. In another embodiment, the air cooler (100) is considered to be one of a trolley type air cooler or a tower type air cooler. For the purpose of this description and ease of understanding, the air cooler (100) is explained herein with below reference to cooling indoor air particularly in a domestic application. For example, the air cooler (100) is considered to be an evaporative domestic air cooler. However, it is also within the scope of the invention to cool indoor air in any of schools, buildings, offices and other small sized rooms without otherwise deterring the intended function of the air cooler (100) as can be deduced from the description and corresponding drawings.
[0045] The base (102) is adapted to store coolant and also to support the air cooling system (106). The base (102) defines a coolant storage chamber (102T), as shown in fig. 1) adapted to store coolant. For example, the coolant is water. The base (102) is considered to be a water reservoir. The base (102) includes a bottom wall (102B), a plurality of side walls (102S), a front wall (102F), a rear wall (102R) and a plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF). Each side wall (102S) transversely extends from corresponding side end of the bottom wall (102B) in an upward direction. The front wall (102F) transversely extends from the front end of the bottom wall (102B) in an upward direction. The rear wall (102R) transversely extends from the rear end of the bottom wall (102B) in an upward direction. The plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF) extends from the bottom wall (102B) in an upward direction, where the plurality of inner partition (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF) is defined within the side walls (102S), the front wall (102F) and the rear wall (102R). The plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF) is adapted to support the resting of the first air cooling module (106A), the second air cooling module (106B) and the blower housing (109H) thereon. The plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF) includes a first cross partition (102VSA), a second cross partition (102VSB), a third cross partition (102VSC), a plurality of fourth cross partitions (102VSD), a plurality of first longitudinal partitions (102VSE) and a plurality of second longitudinal partitions (102VSF). Each first longitudinal partition (102VSE) extends between corresponding ends of the first and second cross partition (102VSA, 102VSB). Each second longitudinal partition (102VSF) extends between corresponding ends of the second and third cross partition (102VSB, 102VSC). A center portion or ends of each first and second longitudinal partitions (102VSE, 102VSF) is spaced in relation with respect to the bottom wall (102B) of the base (102) to facilitate coolant flow thereof. The rear wall (102R) of the base (102) defines a coolant overflow outlet (102X) adapted to facilitate exit of coolant from the coolant storage chamber (102T) of the base (102) to ambient when the coolant in the coolant storage chamber (102T) is more than required coolant level. For the purpose of this description and ease of understanding, the coolant stored in the coolant storage chamber (102T) of the base (102) is considered to be water. It is also within the scope of the invention to provide any other type of coolants instead of water. The drain plug (103) is mounted under the bottom wall (102B) of the base (102). The drain plug (103) is adapted to be removed to facilitate draining of coolant stored in the coolant storage chamber (102T) of the base (102). The coolant storage chamber (102T) defines a slope portion towards the drain plug (103) thereby facilitating easier draining of the coolant from the coolant storage chamber (102T) of the base (102) when the drain plug (103) is removed. The enclosure (104) is adapted to enclose the air cooling system (106) and the blower housing (109H). The enclosure (104) includes a top wall (104T), a plurality of side walls (104S), only one of which is shown in fig. 8a) and a plurality of bottom portions (104B), (only one of which is shown in fig. 8b). Each bottom portion (104B) of the enclosure (104) defines a rail (104BR) adapted to facilitate sliding of the enclosure (104). At least one side wall (104S) of the enclosure (104) defines a plurality of air outlets (104SV), as shown in fig. 8a) adapted to facilitate exit of warm secondary air from the air cooling system (106) to ambient. The enclosure (104) substantially defines a U shape or C shape.
[0046] The air cooling system (106) comprises a first air cooling module (106A) and a second air cooling module (106B). The first air cooling module (106A) is placed on the first cross partition (102VSA), the second cross partition (102VSB) and the plurality of first longitudinal partitions (102VSE) of the base (102). The second air cooling module (106B) is placed on the second cross partition (102VSB), the third cross partition (102VSC) and the plurality of second longitudinal partitions (102VSF).
[0047] Fig. 12a depicts a perspective view of the first air cooling module (106A), according to embodiments as disclosed herein. The first air cooling module (106A) comprises a plurality of cooling facilitating units (106AC), a plurality of conduits (106AP) and a top cellulose unit (106ATC). The top cellulose unit (106ATC) is disposed above the cooling facilitating units (106AC). Each cooling facilitating units (106AC) from the plurality of cooling facilitating units (106AC) comprises a first polymer substrate (106AF), a second polymer substrate (not shown), a first compliant non-woven material (106AW), a second compliant non-woven material (not shown) and at least two polymer strips (106AS).
[0048] One surface of the first polymer substrate (106AF) is being rendered hydrophilic and another surface of the first polymer substrate (106AF) being hydrophobic. One surface of the second polymer substrate is being rendered hydrophilic and another surface of the second polymer substrate being hydrophobic. Before one surface of each first and second polymer substrates (106AF) is rendered substantially hydrophilic, both surfaces of the first and second polymer substrates are substantially hydrophobic. The rendering of one surface of each first and second polymer substrates (106AF) to hydrophilic is obtained, in one instance, by corona treating the surface. In other instances, the surface is rendered substantially hydrophilic by a method such as plasma discharge, plasma jet flame treatment or acid etching. It is also within the scope of the invention to employs any other methods for rendering the surface of each of each first and second polymer substrates (106AF) to substantially hydrophilic. The first polymer substrate (106AF) and the second polymer substrate being adjacent to one another. In one embodiment, the first and second polymer substrates (106AF) of each cooling facilitating units (106AC) are comprised of an extruded thermoplastic polymer such as but not limited to extruded polypropylene (PP). The plurality of conduits (106AP) is disposed between and attached to another surface of the first polymer substrate (106AF) and another surface of the second polymer substrate. In another embodiment, the first and second polymer substrates (106AP) and the conduits (106AP) disposed between them comprise an extruded polymer unit.
[0049] The first compliant nonwoven material (106AW) being disposed on and fixedly attached at a plurality of locations on the one surface of the first polymer substrate (106AF). The second compliant nonwoven material being disposed on and fixedly attached to at another plurality of locations on the one surface of the second polymer substrate. The substantially compliant nonwoven material can be a spunbonded material, a melt blown material, hydroentangled (spunlaced) material or made through any other processes such as co-forming, airlaying, wetlaying, carding webs, thermal bonding, needle punching, chemically bonding or combinations thereof. Embodiments of spunbonded material include polyolefin, Polyethylene terephthalate (PET) and nylon. Embodiments of melt blown material include polyolefin, Polyethylene terephthalate (PET) and nylon. Embodiments of hydroentangled material include cotton, rayon or viscose staple fiber, lyocell staple fiber, polyolefin staple fiber, polyester staple fiber and nylon staple fiber. The embodiment employs nonwoven materials that are typically made from fibers or filaments. Typically, these are made as a very thin web with a very low density described as GSM (grams per square meter). The lower the density, the thinner the nonwoven web. The structure of the nonwoven web used in the embodiment consists of a three dimensional non-uniform arrangement of the fibers/filaments in various orientations. Nonwoven webs can be formed from fibers and filaments based on hydrophobic or hydrophilic polymers. Representative, but not complete, examples of polymers that are hydrophobic for making nonwoven webs are polyolefins and polyethylene terephthalate. Representative, but not complete, examples of hydrophilic polymers for making nonwoven webs include cellulosic materials like cotton, rayon or viscose etc. The application of the fact that under suitable conditions of porosity, fiber/filament diameter, density (GSM) etc, significant capillary action and wicking of water can occur in a web. The air cooler (100) utilizes the porosity of certain porous nonwoven webs that can often be sufficient to enable the easy transport of water and other fluids because of wicking caused by capillary action. In the air cooler (100), while the hydrophilic nonwoven would swell, retaining the thinnest film of the water to facilitate better heat transfer and evaporation. Porous low density nonwoven webs made from hydrophobic fibers or filaments can transfer water through wicking action. Water can flow along, around and over but not through the hydrophobic polymer fibers. The porosity and associated wicking action by a porous nonwoven web can render the nonwoven web effectively hydrophilic in terms of its capability to be wet and easily spread water even if the fibers or filaments constituting the nonwoven web are made from hydrophobic polymers. The air cooler (100) employs the materials known to be hydrophobic for the retention of water as required. This maintains rigidity of heat exchanger pads due to the use of hydrophilic material. Examples of fibers that are hydrophobic are polyolefins and polyethylene terephthalate. Porous low density nonwoven webs made from these hydrophobic fibers or filaments can be hydrophilic through wicking action.
[0050] The at least two polymer strips (106AS) interposed between and fixedly securing together two adjacent cooling facilitating units (106AC) from the at least two cooling facilitating units (106AC) from the plurality of cooling facilitating units (106AC) such that the two adjacent cooling facilitating units (106AC) are separated one from another. During operation of the air cooler (100), the coolant is distributed to the first and second compliant nonwoven material (106AW) of each cooling facilitating units (106AC) and the secondary air is conducted within a space separating each of cooling facilitating units (106AC) with heat being exchanged between the coolant and the secondary air stream, and the primary air stream being conducted (flows) through at least some conduits (106AP) from the plurality of conduits (106AP), where the primary air stream being provided to the second air cooling module (106B), during operation of the air cooler (100), coolant from the base (102) is distributed to the second air cooling module (106B) with heat being exchanged between the coolant and the primary air stream. A portion of the primary air stream, after flowing through at least the first air cooling module (106A), is provided to the second air cooling module (106B) as the secondary air stream. The second air cooling module (106B) being-positioned downstream from the first air cooling module (106A) and receiving at least another portion of the primary air stream from the first air cooling module (106A).
[0051] The second air cooling module (106B) is adapted to cool the cold air received from the first air cooling module (106A). The second air cooling module (106B) comprises a main cellulose unit (106BMC), a cellulose front frame (106BF) and a top cellulose unit (106BTC). The cellulose front frame (106BF) is connected to the main cellulose unit (106BMC). The top cellulose unit (106BTC) is disposed above the main cellulose unit (106BMC). The main cellulose unit (106BMC) is adapted to facilitate cooling of the colder primary air from the first air cooling module (106A). For the purpose of this description and ease of understanding, the first air cooling module (106A) is considered to be an indirect evaporative cooling module and the second air cooling module (106B) is considered to be a direct evaporative cooling module. The second air cooling module (106B) is positioned downstream from the first air cooling module (106A) and receives another portion of the primary air stream from the first air cooling module (106A).
[0052] The plurality of longitudinal sealing members (107LA, 107LB, 107LC, 107LD) are adapted to restrict air flow between the first air cooling module (106A) and the second air cooling module (106B) or the base (102). The plurality of longitudinal sealing members (107LA, 107LB, 107LC, 107LD) includes a first longitudinal sealing member (107LA), a second longitudinal sealing member (107LB), a third longitudinal sealing member (107LC) and a fourth longitudinal sealing member (107LD), as shown in fig. 5. The first longitudinal sealing member (107LA) is engaged to the corresponding first and second longitudinal partitions (102VSE, 102VSF) of the base (102) and the bottom edge portion of first and second air cooling modules (106A, 106B) at a left side. The second longitudinal sealing member (107LB) is engaged to corresponding another first and second longitudinal partitions (102VSE, 102VSF) of the base (102) and another bottom edge portion of first and second air cooling modules (106A, 106B) at a right side. The third longitudinal sealing member (107LC) is engaged to the top edge portion of first and second air cooling modules (106A, 106B) at the left side. The fourth longitudinal sealing member (107LD) is engaged to another top edge portion of first and second air cooling modules (106A, 106B) at the right side. Each longitudinal sealing member (107LA, 107LB, 107LC, 107LD) extends along a lengthwise direction of the air cooler (100). Each longitudinal sealing member (107LA, 107LB, 107LC, 107LD) is a L shaped sealing member.
[0053] The plurality of cross sealing members (107CSA, 107CSB) is adapted to restrict air flow between the first air cooling module (106A) and the second air cooling module (106B). The plurality of cross sealing members (107CSA, 107CSB) includes a first cross sealing member (107CSA) and a second cross sealing member (107CSB), as shown in fig. 5). The first cross sealing member (107CSA) is engaged to the first cross partition (102VSA) of the base (102) and the bottom edge portion of first air cooling module (106A) at a front end. The second cross sealing member (107CSB) is engaged to the top edge portion of the first air cooling module (106A) at the front end. Each cross sealing member (107CSA, 107CSB, 107CSC, 107CSD) extends along a widthwise direction of the air cooler (100). Each cross sealing member (107CSA, 107CSB) is a L shaped sealing member. In an embodiment, the air cooler (100) includes a third cross sealing member (107CSC) engaged to the top portion of the second air cooling module (106B) and the cellulose front frame (106BF) and is positioned inside the top cover (107TC). The third cross sealing member (107CSC) is a L shaped sealing member.
[0054] The plurality of vertical sealing members (107VSA, 107VSB) is adapted to restrict air flow between the first air cooling module (106A) and the second air cooling module (106B). The plurality of vertical sealing members (107VSA, 107VSB) includes a first vertical sealing member (107VSA) and a second vertical sealing member (107VSB), as shown in fig. 5). The first vertical sealing member (107VSA) is engaged to the side edge portion of the first air cooling module (106A) at the front end. The second vertical sealing member (107VSB) is engaged to another side edge portion of the first air cooling module (106A) at the front end. Each vertical sealing member (107VSA, 107VSB) extends along a height wise direction of the air cooler (100). Each vertical sealing member (107VSA, 107VSB) is a L shaped sealing member.
[0055] The air intake blower (108) is located at rear-end of the air cooler (100). The intake air blower (108) is adapted to circulate intake air in a direction towards the first air cooling module (106A). The air intake blower (108) is positioned at a distance of at least 195 mm from the first air cooling module (106A). It is also within the scope of the invention to vary the distance between the air intake blower (108) and the first air cooling module (106A) as per requirement. The intake air is received in an air chamber and is separated into primary air stream and a secondary air stream, where the primary air stream flows inside the conduits (106AP) of the first air cooling module (106A). The intake air blower (108) is a backward curve centrifugal type blower. The blower housing (109H) is adapted to house the air intake blower (108). The air filter (109F) is adapted to filter the intake air. The blower knob (109K) is adapted to switch ON/OFF the air intake blower (108). The blower switch cover (109C) is adapted to accommodate the blower knob (109K).
[0056] The coolant feeding system (110) comprises a pump (110P), a plurality of first sprinklers (110S) and a plurality of second sprinklers (110R). The pump (110P) is adapted to circulate coolant from the coolant storage chamber (102T) of the base (102) to the plurality of first and second sprinklers (110S, 110R). The pump (110P) is disposed between corresponding first longitudinal partition (102VSE) and the side wall (102S) of the base (102) thereby consuming less packaging space. The first sprinklers (110S) are adapted to sprinkle the coolant onto the first air cooling module (106A) thereby facilitating cooling of primary air. For example, the first sprinklers (110S) are adapted to sprinkle the coolant onto the top cellulose unit (106ATC) and therefrom the coolant contacts the at least one cooling facilitating units (106AC) thereby facilitating cooling of primary air. The second sprinklers (110R) are adapted to sprinkle the coolant onto the main cellulose unit (106BMC) through the top cellulose unit (106BTC) of the second air cooling module (106B). Each first and second sprinkler (110S, 110R) defines a plurality of coolant outlets (not shown) defined on one or both side portions of the sprinkler (110S, 110R). The coolant outlets defined on the side portion of the sprinkler (110S, 110R) reduces the scaling effect. The secondary air stream is vented to the atmosphere through air outlets (107TCX, 104SV) defined in the top cover (107TC) and the enclosure (104). The top cover (107TC) is adapted to restrict air flow between the first air cooling module (106A) and the second air cooling module (106B) and also to facilitate venting of warm secondary air to the atmosphere. The top cover (107TC) includes top wall (107TCT), a plurality of side walls (107TCS), (only one of which is shown in fig. 9a) a front wall (107TCF), a rear wall (107TCR) and at least one sealing partition (107TCP), as shown in fig. 7a and fig. 7b). The sealing partition (107TCP) is adapted to restrict the secondary air flow from the first air cooling module (106A) to the second air cooling module (106B). The sealing partition (107TCP) of the top cover (107TC) transversely extends from the top wall (107TCT) in a downward direction and is located between the front and rear walls (107TCF, 107TCR) of the top cover (107TC). The rear wall (107TCR) of the top cover (107TC) defines at least air outlet (107TCX) adapted to facilitate exit of warm secondary air from the first air cooling module (106A) to the ambient through the air outlets (104SV) of the side wall (104S) of the enclosure (104). The base (102) includes at least one partition adapted to restrict the intake air flow to the coolant stored in the coolant storage chamber (102T) of the base (102).
[0057] The pump control switch (111S) is adapted to switch ON/OFF the pump (100P). The pump switch cover (111C) is adapted to accommodate the pump control switch (111S).
[0058] The plurality of vertical louvers (112) is adapted to control direction of cool air dispensed along a first direction. The plurality of horizontal louvers (114) is adapted to control direction of cool air dispensed along a second direction which is transverse to the first direction. The air throw enhancing member (116) is disposed between the vertical louver system (112) and the front fascia (118). The air throw enhancing member (116) is adapted to increase air throw of cool air received from the air cooling system (106). The front fascia (118) is disposed at a front end of the air cooler (100). The air throw enhancing member (116) includes a peripheral frame (116F) and a plurality of air deflecting portions (116D), where the air deflecting portions (116) is adapted to deflect the cool air to said horizontal louvers (114). The humidity control knob (124) is adapted to control the humidity level of cool air being provided by the air cooler (100) to the indoor room. The coolant level indicator (126) is adapted to indicate coolant level in the coolant storage chamber (102T) of the base (102).In another embodiment, the air cooler (100) includes at least one air disinfection unit for disinfecting the air dispensed by the air cooler (100).
[0059] The technical advantages of the air cooler (100) are as follows. The air cooler which has better cooling efficiency. The air cooler (100) is capable of window mounting and can be retrofitted in the space of a window air conditioner. The air cooler (100) has improving air throw. The air cooler (100) is capable of cooling air without addition of humidity when it uses indirect evaporative cooling. The air cooler (100) is capable of achieving superior cooling with air conditioner feel. The air cooler reduces the effect of acoustic noise experienced by the user. The air cooler (100) consumes electrical energy which is comparable with existing air coolers and lower than existing window air conditioners. The air cooler (100) is capable of running in power outage situations using sources like household inverters. The air cooler (100) has reduced noise characteristics by placing an air intake blower (fan) away from the air throw grill and towards the rear end of the air cooler (100).
[0060] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modifications within the spirit and scope of the embodiments as described herein.
,CLAIMS:We claim:
1. An air cooler (100) comprising:
an air cooling system (106) comprising a first air cooling module (106A), said first air cooling module (106A) comprises a plurality of conduits (106AP);
an intake air blower (108) located at a rear-end of said air cooler (100), said intake air blower (108) is adapted to circulate intake air in a direction towards said first air cooling module (106A);
a base (102), said base (102) defines a coolant storage chamber (102T) adapted to store coolant; and
a coolant feeding system (110) comprising a pump (110P) and a plurality of first sprinklers (110S),
wherein
the intake air is received by an air chamber and is bifurcated into primary air stream and a secondary air stream, where the primary air stream flows inside said conduits (106AP) of said first air cooling module (106A);
said pump (106P) is adapted to circulate coolant from said coolant storage chamber (102T) of said base (102) to said first sprinklers (110S); and
said first sprinklers (110S) are adapted to sprinkle the coolant onto said first air cooling module (106A) thereby facilitating cooling of the primary air flowing inside said conduits (106AP).

2. The air cooler (100) as claimed in claim 1, wherein said air cooler (100) comprises a second air cooling module (106B) adapted to cool the cold air received from said first air cooling module (106A), where said second air cooling module (106B) comprises,
a main cellulose unit (106BMC);
a cellulose front frame (106BF) connected to said main cellulose unit (106BMC) at a front end; and
a top cellulose unit (106BTC) disposed above said main cellulose unit (106BMC),
wherein
said coolant feeding system (110) comprises a plurality of second sprinklers (110R) adapted to receive coolant from said pump (110P), where said second sprinklers (110R) are adapted to sprinkle the coolant onto said main cellulose unit (106BMC) through said top cellulose unit (106BTC);
each of said first and second sprinklers (110S, 110R) defines a plurality of coolant outlets defined on one or both side portions of said sprinkler (110S, 110R), where said coolant outlets is adapted to facilitate exit of coolant from said spriklers (110S, 110R); and
said main cellulose unit (106BMC) is adapted to facilitate cooling of the colder primary air received from said first air cooling module (106A).

3. The air cooler (100) as claimed in claim 2, wherein said first air cooling module (106A) comprises,
a plurality of cooling facilitating units (106AC); and
a top cellulose unit (106ATC) disposed above said plurality of cooling facilitating units (106AC), wherein each of said cooling facilitating unit (106AC) from said plurality of cooling facilitating units (106AC) comprises,
a first polymer substrate (106AF), one surface of said first polymer substrate (106AF) being rendered hydrophilic and another surface of said first polymer substrate (106AF) being hydrophobic;
a second polymer substrate, one surface of said second polymer substrate being rendered hydrophilic and another surface of said second polymer substrate being hydrophobic;
a first compliant nonwoven material (106AW) being disposed on and fixedly attached at a plurality of locations on said one surface of said first polymer substrate (106AF);
a second compliant nonwoven material being disposed on and fixedly attached to at another plurality of locations on said one surface of said second polymer substrate; and
at least two polymer strips (106AS) interposed between and fixedly securing together two adjacent cooling facilitating units (106AC) rom said plurality of cooling facilitating units (106AC) such that said two adjacent cooling facilitating units (106AC) are separated one from another,
wherein
said first polymer substrate (106AF) and said second polymer substrate being adjacent one another, where said plurality of conduits (106AP) is disposed between and attached to said another surface of said first polymer substrate (106AF) and said another surface of said second polymer substrate;
said first sprinklers (110S) are adapted to sprinkle the coolant onto said top cellulose unit (106ATC) which allows the coolant to pass therethrough and the coolant is distributed to said first and second compliant nonwoven material (106AW) of each cooling facilitating units (106AC) and the secondary air is conducted within a space separating each of said cooling facilitating units (106AC) with heat being exchanged between the coolant and the secondary air stream, and the primary air stream being conducted through said at least some conduits (106AP) from said plurality of conduits (106AP), where the primary air stream being provided to said second air cooling module (106B), during operation of said air cooler (100), coolant from the base (102) is distributed to said second air cooling module (106B) with heat being exchanged between the coolant and the primary air stream;
a portion of said primary air stream, after flowing through said conduits (106AP) of said first air cooling module (106A), is provided to said first air cooling module (106A) as the secondary air stream; and
said second air cooling module (106B) being-positioned downstream from said first air cooling module (106A) and receiving at least another portion of said primary air stream from said first air cooling module (106A).

4. The air cooler (100) as claimed in claim 3, wherein said air cooler (100) comprises,
a top cover (107TC) adapted to be disposed above said top cellulose unit (106ATC) of said first air cooling module (106A) and said top cellulose unit (106BTC) of said second air cooling module (106B); and
an enclosure (104) adapted to enclose said air cooling system (106), wherein said enclosure (104) includes a top wall (104T) , a plurality of side walls (104S), where each of said side wall (104S) extends from corresponding end of said top wall (104T), and a plurality of bottom portions (104B,
wherein
said top cover (107TC) includes a top wall (107TCT), a plurality of side walls (107TCS), a front wall (107TCF), a rear wall (107TCR) and at least one sealing partition (107TCP), where said sealing partition (107TCP) is adapted to restrict the secondary air flow from said first air cooling module (106A) to said second air cooling module (106B);
said rear wall (107TCR) of said top cover (107TC) defines at least air outlet (107TCX) adapted to facilitate exit of warm secondary air from said first air cooling module (106A) to the ambient;
each bottom portion (104B) of said enclosure (104) defines a rail (104BR) adapted to facilitate sliding of said enclosure (104); and
said side wall (104S) of said enclosure (104) defines a plurality of air outlets (104SV) adapted to facilitate exit of warm secondary air from the at least air outlet (107TCX) of the rear wall (107CTR) of said top cover (107TC) to ambient.

5. The air cooler (100) as claimed in claim 1, wherein said air cooler (100) comprises,
a front fascia (118) disposed at a front end of said air cooler (100);
a plurality of vertical louvers (112) adapted to control direction of cool air dispensed along a first direction;
a plurality of horizontal louvers (114) adapted to control direction of cool air dispensed along a second direction which is transverse to the first direction; and
a air throw enhancing member (116) disposed between said second air cooling module (106B) and said front fascia (118), said air throw enhancing member (116) is adapted to increase air throw of cool air received from said air cooling system (106).

6. The air cooler (100) as claimed in claim 4, wherein said base (102) is adapted to support said air cooling system (106), said base (102) includes a bottom wall (102B), a plurality of side walls (102S), a front wall (102F), a rear wall (102R) and a plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF), where said plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF) is adapted to support resting of said first air cooling module (106A), said second air cooling module (106B) and a blower housing (109H) thereon,
wherein
said plurality of inner partitions (102VSA, 102VSB, 102VSC, 102VSD, 102VSE, 102VSF) includes a first cross partition (102VSA), a second cross partition (102VSB), a third cross partition (102VSC), a plurality of fourth cross partitions (102VSD), a plurality of first longitudinal partitions (102VSE) and a plurality of second longitudinal partitions (102VSF);
each first longitudinal partition (102VSE) extends between corresponding ends of the first and second cross partition (102VSA, 102VSB);
each second longitudinal partition (102VSF) extends between corresponding ends of the second and third cross partition (102VSB, 102VSC);
a center portion or ends of each first and second longitudinal partitions (102VSE, 102VSF) is spaced in relation with respect to the bottom wall (102B) of said base (102) to facilitate coolant flow thereof;
the rear wall (102R) of said base (102) defines a coolant overflow outlet (102X) adapted to facilitate exit of coolant from the coolant storage chamber (102T) of said base (102) to ambient when the coolant in the coolant storage chamber (102T) is more than required coolant level;
the coolant storage chamber (102T) defines a slope portion towards a drain plug (103) thereby facilitating easier draining of the coolant from the coolant storage chamber (102T) of said base (102) when the drain plug (103) is removed;
said base (102) is a coolant reservoir;
said intake air blower (108) is opposite to said front fascia (118);
said air intake blower (108) is positioned at a distance of at least 195 mm from the first air cooling module (106A);
said pump (110P) is disposed between corresponding said first longitudinal partition (102VSE) and the side wall (102S) of said base (102) thereby consuming less packaging space;
said intake air blower (108) is a backward curve centrifugal type blower;
said air cooler (100) is a window mounting type air cooler;
said first air cooling module (106A) is an indirect evaporative cooling module;
said second air cooling module (106B) is a direct evaporative cooling module; and
said air cooler (100) is one of a trolley type air cooler or a tower type air cooler

7. The air cooler (100) as claimed in claim 5, wherein said air throw enhancing member (116) defines a peripheral frame (116F) and a plurality of air deflecting portions adapted to deflect the cool air to said horizontal louvers (114).

8. The air cooler (100) as claimed in claim 6, wherein said air cooler (100) comprises a plurality of longitudinal sealing members (107LA, 107LB, 107LC, 107LD) adapted to restrict air flow between said first air cooling module (106A) and said second air cooling module (106B) or said base (102),
wherein
said plurality of longitudinal sealing members (107LA, 107LB, 107LC, 107LD) includes,
a first longitudinal sealing member (107LA) engaged to corresponding first and second longitudinal partitions (102VSE, 102VSF) of said base (102) and the bottom edge portion of first and second air cooling modules (106A, 106B) at a left side;
a second longitudinal sealing member (107LB) engaged to corresponding another first and second longitudinal partitions (102VSE, 102VSF) of said base (102) and another bottom edge portion of said first and second air cooling modules (106A, 106B) at a right side;
a third longitudinal sealing member (107LC) engaged to the top edge portion of said first and second air cooling modules (106A, 106B) at the left side; and
a fourth longitudinal sealing member (107LD) engaged to another top edge portion of said first and second air cooling modules (106A, 106B) at the right side.

9. The air cooler (100) as claimed in claim 6, wherein said air cooler (100) comprises a plurality of cross sealing members (107CSA, 107CSB) adapted to restrict air flow between said first air cooling module (106A) and said second air cooling module (106B),
wherein
said plurality of cross sealing members (107CSA, 107CSB) includes,
a first cross sealing member (107CSA) engaged to the first cross partition (102VSA) of said base (102) and the bottom edge portion of first air cooling module (106A) at a front end; and
a second cross sealing member (107CSB) engaged to the top edge portion of the first air cooling module (106A) at the front end, where said air cooler (100) comprises a third cross sealing member (107CSC) engaged to the top portion of said second air cooling module (106B) and the cellulose front frame (106BF) and is positioned inside said top cover (107TC). .

10. The air cooler (100) as claimed in claim 6, wherein said air cooler (100) comprises a plurality of vertical sealing members (107VSA, 107VSB) adapted to restrict air flow between the first air cooling module (106A) and the second air cooling module (106B),
wherein
said plurality of vertical sealing members (107VSA, 107VSB) includes,
a first vertical sealing member (107VSA) engaged to the side edge portion of the first air cooling module (106A) at the front end;
a second vertical sealing member (107VSB) engaged to another side edge portion of the first air cooling module (106A) at the front end.