Patent Publication Number: US-2020300531-A1

Title: Evaporative personal air cooler with clip

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation-in-part of U.S. patent application Ser. No. 16/239,161, filed on Jan. 3, 2019, the entire disclosure of which is incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The present disclosure relates generally to an evaporative personal air cooler with a clip. 
     BACKGROUND 
     Evaporative personal air coolers are commonly used to cool air in a home, office, or other hot, dry air environment. Conventional evaporative air coolers operate by drawing ambient air into the evaporative air cooler and direct it through a water-soaked filter device. As warm air passes through the water-soaked filters, heat from the ambient air evaporates water trapped in the water-soaked filter device. The evaporated water cools the air as it leaves the water-soaked filter device and exits the evaporative air cooler. 
     Conventional evaporative air coolers typically include a fan, a filter device, and a water distribution system. The fan draws outside air into the evaporative air cooler, pushes it through the filter device to produce cooler air, and then pushes the cooler air out of the evaporative air cooler. More specifically, the water distribution system provides water to the filter device so that the filter device becomes water soaked. The water distribution system includes a water pump that draws water from a reservoir and distributes the water to a bottom surface of the filter device which soaks upwards. Depending on the type of filter and the amount of water in the reservoir, the water may travel only partially up the filters. If the filters are not fully soaked with water, the evaporative air cooler is less effective at producing cooler air. Filter devices typically include filters made of a paper-like material that have to be replaced often. The filters cannot be reused or easily cleaned. 
     Some of the water distributed to the filter device evaporates as air flows through the filters. The water in the reservoir depletes as the evaporative air cooler operates due to the evaporation. Any unabsorbed water that recirculates within the evaporative air cooler returns to the reservoir. When the reservoir is fully depleted of water but the filter device is soaked with water, the evaporative air cooler can still produce cooler air, but it becomes less effective. The evaporative air cooler will cease producing cooler air when the filter device is dry. Thus, additional water must be constantly added to replace the water that has been evaporated. 
     It typically takes conventional evaporative air coolers a considerable period of 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. 
     Furthermore, conventional evaporative air coolers are typically placed on a flat surface, such as a table, a countertop, or a desk in order to cool people in a room. Conventional evaporative air coolers are not configured to attach onto devices, such as an end of a shelf or a stroller handle. 
     SUMMARY 
     This section provides a general summary of the present disclosure and is not a comprehensive disclosure of its full scope or all of its features, aspects, and objectives. 
     Disclosed herein are implementations of an evaporative air cooler. The evaporative air cooler includes a housing defining an interior of the evaporative air cooler; a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; a filter structure with a filter, wherein the filter is configured to absorb the mist; a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist and the filter, and wherein the fan directs the air through the filter structure and from the interior; and a clip coupled to the housing. 
     Also disclosed herein are implementations of an evaporative air cooler comprising a housing defining an interior of the evaporative air cooler; a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; a filter structure with a filter, wherein the filter is configured to absorb the mist; a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist and the filter, and wherein the fan directs the air through the filter structure and from the interior; an angling member coupled to the housing, wherein the angling member is configured to rotate the housing; and a clip coupled to the angling member. 
     Also disclosed herein are implementations of an evaporative air cooler comprising a housing defining an interior of the evaporative air cooler; a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; a filter structure with a filter and a second filter, wherein the filter and the second filter are configured to absorb the mist; a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist, the filter, and the second filter, and wherein the fan directs the air through the filter structure and from the interior; and a clip coupled to the housing. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The disclosure is best understood from the following detailed description when read in conjunction with the accompanying drawings. It is emphasized that, according to common practice, the various features of the drawings are not to-scale. On the contrary, the dimensions of the various features are arbitrarily expanded or reduced for clarity. 
         FIG. 1  is a perspective view of an evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 2  is a side view of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 3  is a front view of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 4  is a perspective view of an internal assembly of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 5  is a perspective view of an interior of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIGS. 6A-6B  are perspective views of a filter structure of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 6C  is a top view of a filter structure of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 7  is a front perspective view of the evaporative personal air cooler after the internal assembly is removed in accordance with aspects of the present disclosure. 
         FIG. 8  is a front view of a fan cover assembly of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 9  is a top view of a water tank of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 10  is a perspective view of an exemplary embodiment of an evaporative personal air cooler attached to an exemplary stroller in accordance with aspects of the present disclosure. 
         FIG. 11  is a side view of the evaporative personal air cooler in accordance with aspects of the present disclosure. 
         FIG. 12  is a side view of the evaporative air cooler with a lid open in accordance with aspects of the present disclosure. 
         FIG. 13  is a top view of the evaporative air cooler with the lid open in accordance with aspects of the present disclosure. 
         FIG. 14  is a front view of the evaporative air cooler in accordance with aspects of the present disclosure. 
         FIG. 15  is an exploded view of the evaporative air cooler in accordance with aspects of the present disclosure. 
         FIGS. 16A-C  are a views of a filter structure of the evaporative air cooler in accordance with aspects of the present disclosure. 
         FIG. 17  is a front perspective view of the evaporative personal air cooler after the internal assembly is removed in accordance with aspects of the present disclosure. 
         FIG. 18  is a back perspective view of an evaporative air cooler in accordance with aspects of the present disclosure. 
         FIG. 19  is a perspective view of a clip of an evaporative air cooler in accordance with aspects of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The following description is merely exemplary in nature and is not intended to limit the disclosure in its application or uses. For purposes of clarity, the same reference numbers are used in the description and drawings to identify similar elements. 
     The present disclosure relates generally to an evaporative personal air cooler by which it draws in ambient air, cools the ambient air, and blows out the cooled ambient air. In this disclosure, the evaporative personal air cooler may be referred to as an evaporative air cooler, a portable evaporative air cooler, or any other desirable air cooler. 
     The evaporative air cooler  10  can include a housing  20  having a power adapter, a water tank  40 , a v-shaped shroud  44 , a fan  48 , a drawer  50 , and a filter structure  56 . 
       FIG. 1  illustrates an exemplary evaporative air cooler  10 . The evaporative air cooler can include the housing  20  with a top face  22 , a bottom face  24 , and four lateral faces, such as a front face  26 , a back face  28 , and side faces  30 . The housing  20  can be formed as a cube housing, a rectangular housing, or any other desirable configuration or shape. The housing  20  can be formed from plastic or any other desirable material. 
     The top face  22  can include a lid, such as a hinged lid  32 .  FIG. 2  illustrates the evaporative air cooler  10  with the hinged lid  32  opened for access to the water tank  40 . The hinged lid  32  can be located along a front portion of the top face  22 . The hinged lid  32  can include a lid tab  76  positioned in the front of the hinged lid  32  or any other desirable location. The hinged lid  32  can be opened to allow for water to fill the water tank  40 . For example, a user can pull the lid tab  76  upward to open the hinged lid  32 . The hinged lid  32  can be formed from plastic or any other desirable material. The opening to the water tank  40  can be any desirable opening and is not limited to the hinged lid  32  described in this disclosure. 
     The top face  22  can also include buttons, such as a power button  34 , a light button  36 , or any other desirable button. The top face  22  can also include one or more lights, such as an indicator light  38  or any other desirable light or indicator. The indicator light  38  may be used to indicate a fan speed, a level of water located within the water tank  40 , whether filters  58  should be replaced, or any other desirable indication. For example, at a high speed, all three indicator lights  38  can be powered ON. At a medium speed, two indicator lights  38  can be powered ON. At a low speed, one indicator light  38  can be powered ON. In one embodiment, if the power button  34  is held down for at least three seconds, the indicator lights  38  can all turn off. The indicator light  38  may include one or more lights. The indicator light  38  may display a blinking light or a solid light. The indicator light  38  may display different light colors, such as green, red, amber, or any other desirable color. 
     The power button  34  can be configured to activate (e.g., power ON), change the fan speed of the fan  48 , and deactivate (e.g., power OFF) the evaporative air cooler  10 . For example, when the power button  34  is first activated, the indicator light  38  (e.g., three indicator lights  38 ) can turn ON, the fan  48  can turn ON (e.g., to a high speed), and an aperture  42  positioned in the water tank  40  can allow water to flow out of the tank  40  to begin the evaporative air cooling process. When the power button  34  is activated a second time, one of the indicator lights  38  can turn OFF (e.g., two indicator lights  38  remain ON), the fan speed can decrease (e.g., to a medium speed), and the aperture  42  can allow less water to flow out of the tank  40 . When the power button  34  is activated a third time, one of the indicator lights  38  can turn OFF (e.g., one indicator light  38  remain ON), the fan speed can decrease (e.g., to a low speed), and the aperture  42  can allow less water to flow out of the tank  40 . When the power button  34  is activated a fourth time, one of the indicator lights  38  can turn OFF (e.g., no indicator lights  38  remain ON), the fan  48  can turn OFF, and the aperture  42  can stop the water from flowing out of the tank  40 . In other words, the power button  34  can be activated to deactivate, or power OFF the evaporative air cooler  10 . In one embodiment, when the power button  34  is activated (e.g. pressed downward) for three or more seconds, it can turn OFF the indicator lights  38  and the evaporative air cooler  10 . 
     The fan  48  can be wired to the evaporative air cooler  10 . The wires can be soldered to electrically connect the fan  48  to the evaporative air cooler  10 , or attached in any other desirable way. The wires can be hidden in a wire compartment or any other desirable compartment within the evaporative air cooler  10 . 
     A light, such as a blue LED light, can be positioned within the water tank  40 , such as beneath the power button  34 , or any other desirable area for illuminating the water tank  40 . The light can be used for ambiance, as a nightlight, or any other desirable purpose. The light may be on by default when the evaporative air cooler  10  is powered ON. The user can lower the brightness of the light or turn OFF the blue LED completely by pressing the light button  36 . For example, after the power button  34  is pressed, the light is on a high brightness mode. When the user presses the light button  36  for a first time, the light can reduce its brightness (e.g., to a low brightness mode). When the user presses the light button for a second time, the light can turn OFF. In one embodiment, if the light button  36  is activated for a minimum amount of time (e.g., three seconds), an illumination setting can be selected and/or locked. 
     As illustrated in  FIG. 2 , the bottom face  24  can include feet  62  that project outward from the bottom face  24 . The feet  62  can be configured to elevate the evaporative air cooler  10  from a surface it is placed on. The feet  62  can also be configured to prevent the evaporative air cooler  10  from damaging the surface. For example, when sliding the evaporative air cooler  10  across the surface, the feet  62  can prevent the scratching of the surface. The feet  62  may be formed from rubber, plastic, grips, or any other desirable material. The bottom face  24  can include a plurality of feet  62 . The feet  62  may be formed as circular feet  62 , ovular feet  62 , square feet  62 , rectangular feet  62 , or any other desirable shape. The feet  62  can be positioned toward each corner of the bottom face  24 , or any other desirable location. In an alternative embodiment, the bottom face  24  does not include feet  62 . 
     The lateral faces can include a front face  26 , a back face  28 , and two side faces  30 . The lateral faces can be positioned between the top face  22  and the bottom face  24  about their outer perimeters. The lateral faces can be positioned adjacent each other. The lateral faces can include a framed portion  64  and a face portion  66 . The framed portion  64  can be positioned about a perimeter of a lateral face, wherein the face portion  66  is positioned within the framed portion  64 . For example, the side faces  30  can include an upper portion  68 , the framed portion  64  positioned adjacent the upper portion  68  and along the side and bottom edges of the side faces  30 , and a face portion  66  positioned within the framed portion  64 . 
     As illustrated in  FIG. 3 , the front face  26  can include an upper portion  68  and a framed portion  64  positioned adjacent the upper portion  68  and along the side and bottom edges of the top face  22 . The front face  26  can also include an outlet vent  52  positioned within the framed portion  64 . The outlet vent  52  can include a plurality of vents  70 , an air direction tab  72 , and a filter drawer tab  120 . The plurality of vents  70  can include a fixed vent  122  and an adjustable vent  124 . For example, the fixed vent  122  may be positioned as the lowest vent  70  on the outlet vent  52 . The remainder of the plurality of vents  70  may consist of the adjustable vent  124 . Each of the plurality of vents  70  can be positioned horizontally in the outlet vent  52 . Each of the adjustable vents  124  can be movably connected to the air direction tab  72 . The air direction tab  72  can be positioned to direct air flowing from inside the evaporative air cooler  10  through the outlet vent  52 . 
     For example, if the air direction tab  72  is positioned upward, the adjustable vents  124  may be positioned in an upward position to direct the airflow upward. Similarly, if the air direction tab  72  is positioned downward, the adjustable vents  124  may be positioned in a downward position to direct the airflow downward. If the air direction tab  72  is positioned in a center position, the adjustable vents  124  may be positioned in a substantially horizontal position, directing the air to flow horizontally from the evaporative air cooler  10 . The air direction tab  72  can direct the air to flow at any angle between the downward and upward angles. 
     The face portion  66  of the front face  26 , such as the outlet vent  52 , can be connected to an internal assembly  74  that is removable from the housing  20 . As illustrated in  FIGS. 4 and 5 , the internal assembly  74  of the evaporative air cooler  10  can include the filter structure  56  including filters  58 , the drawer  50  including a water tray  54 . The internal assembly  74  can fit tightly around the circumference of the fan  48 . For example, the internal assembly  74  can form a seal around the fan  48  to direct air out of the evaporative air cooler  10 . The internal assembly  74  can be configured to increase the force of the air as it exits the evaporative air cooler  10  to increase the cooling effect of the evaporative air cooler  10 . The internal assembly  74  may also be configured to decrease noises produced during operation of the evaporative air cooler  10 . For example, the seal, such as an airtight seal, reduces the amount of air escaping from the evaporative air cooler  10  and reduces air vibrating off of other components or the walls of the evaporative air cooler  10 . 
     The drawer  50  can be attached to the outlet vent  52 . The outlet vent  52  can be removed from the evaporative air cooler  10 . For example, the fixed vent  122  can include a filter drawer tab  120 . The user can pull on the filter drawer tab  120  to remove the outlet vent  52  from the evaporative air cooler  10 . The outlet vent  52  can have one or more tabs or any other desirable device for removing the outlet vent  52  from the evaporative air cooler  10 . An interior side of the side faces  30  can include a drawer guide  108 . The drawer guide  108  is configured to assist the user in slidably removing and inserting the drawer from and into the housing  20 . 
     The drawer  50  can include the water tray  54 . The water tray  54  can be positioned in the drawer  50 . The water tray  54  can be formed as the bottom of the housing  20 . The water tray  54  can be angled for any liquid on the water tray  54  to flow in a direction toward the filter structure  56 . For example, the water tray  54  can be higher toward a back end  78  of the drawer  50  than toward the front end  80  of the drawer. The water tray  54  can be configured for cleaning. For example, when the drawer  50  is removed from the evaporative air cooler  10  and the filter structure  56  is removed from the water tray  54 , the water tray  54  can be easily accessible for cleaning. The user can wipe down and dry or otherwise clean the water tray  54 . Cleaning the water tray  54  may result in less mold or other bacteria. 
     The drawer  50  can be configured to support the filter structure  56 . The filter structure  56  can be removably attached to the drawer  50 . The drawer  50  can have a drawer notch  128  to secure the filter structure  56  in place. For example, the filter structure  56  can be placed on a top surface of the water tray  54  between the outlet vent  52  and the drawer notch  128 . 
     As illustrated in  FIGS. 6A-6C , the filter structure  56  can include a filter frame  82  and a plurality of filter holders  84  attached to opposing sides of the filter frame  82 . In one exemplary embodiment, as illustrated in  FIG. 6C , the filter frame  82  can include a top opening  86  and a bottom opening  88 . The top opening  86  can be configured to allow for a mist  118  to contact top portions  112  of the filters  58 . The bottom opening  88  can be configured to allow for the mist  118  and/or liquid, such as water, to contact bottom portions  114  of the filters  58 . For example, if liquid has collected in the water tray  54 , the liquid can contact bottom portions  114  of the filters  58 . The sponge material  60  of the filters  58  may soak up the liquid. The sponge material  60  may also soak up the mist  118  as it contacts the filters  58 . The filter holders  84  can define a plurality of holes, or filter openings  90 . Each filter opening  90  can be configured for one filter  58  to be positioned within it. The filter holders  84  can be positioned substantially parallel to each other within the filter structure  56 . The filter holders  84  can be configured to hold the filters  58  in place. The filters  58  can be positioned substantially parallel to each other and to opposing sides of the filter structure  56 . The filter holders  84  can be configured with space, such as air gaps  92 , between each filter holder  84  to allow for the mist  118  and/or liquid to contact the filters  58 . The air and/or the mist  118  may also flow through the air gaps  92  and out of the evaporative air cooler  10 . The filter structure  56  can be formed from plastic, metal, or any other desirable material. 
     As shown in  FIGS. 4-6 , the filter structure  56  can include a plurality of filters  58  mounted vertically. The filters  58  can be positioned parallel to the direction of airflow. The filters  58  can be formed from a sponge material  60 . The filters  58  can be soaked prior to use. For example, the user can pull the filter drawer tab  120  on the outlet vent  52  to pull out the internal assembly  74 , including the drawer  50 , water tray  54 , and the filter structure  56 . The internal assembly  74  can slide out from within the evaporative air cooler  10 . The filter structure  56  can be removed from drawer  50 . The filter structure  56  can be placed in liquid, such as water, placed under running water, or any other desirable method to soak the filters  58 . After the filters  58  are wet, the filter structure  56  can be placed in the freezer, or any other desirable cooling device. If the wet filters  58  are frozen, the cooling effect of the evaporative air cooler  10  can be enhanced. When complete, the user can put the filter structure  56  on the drawer  50  and slide the internal assembly  74  back into the evaporative air cooler  10 . If the filters  58  are pre-moistened, the initial cooling effect can increase because air travels through the wet filters  58  when the evaporative air cooler  10  first starts running. If the filters  58  are not presoaked, the evaporative air cooler  10  can produce cool air, but it may not be at capacity. 
     The filter structure  56 , including the plurality of filters  58 , can be constructed of sponge material  60 , plastic and sponge material  60 , or any other desirable material. The filter structure  56 , together with the filters  58 , can be configured for cleaning. For example, the plastic and sponge material  60  can be cleaned using various methods, such as handwashing, soaking, dishwasher, or any other desirable method. The filter structure  56 , including the filters  58 , can be sanitized. For example, the filter structure  56 , including the filters  58 , can be sanitized in a microwave or any other desirable method. The filters  58  can be handled, washed, and used more vigorously than filters formed from paper material. The filters  58  can be reusable, used longer while wet, re-moistened and re-dried, and have an overall longer lifetime and usability than paper filters. The filter structure  56  can be replaced, for example, after three to six months of use. 
     The evaporative air cooler  10  can also be powered ON without water in the water tank  40  to dry out the filters  58  and the interior of the evaporative air cooler  10 . For example, if a user plans to not use the evaporative air cooler  10  for an extended period of time, the user can empty the water tank  40 , press the power button  34  to turn the evaporative air cooler  10  ON to the high mode for a period of time, such as for four hours. 
     The back face  28  can include the upper portion  68  and the framed portion  64 . The back face  28  can include a power port for the power adapter. The power adapter includes a cord with a first power adapter plug on one end that is configured to plug into the power port and a second power adapter plug on the opposite end of the cord that is configured to plug into an outlet, such as a wall outlet or a power strip. The power port can be located in the upper portion  68  of the back face  28  or any other desirable location on the evaporative air cooler  10 . In another embodiment, the evaporative air cooler  10  can be powered using batteries or another power source. 
     The back face  28  can also include a grate  94 . The grate  94  can be positioned within the framed portion  64 . The grate  94  can include a plurality of ribs positioned horizontally or vertically along the back face  28 . As shown in  FIGS. 5 and 6 , the grate  94  includes both horizontal ribs  96  and vertical ribs  98  that define a plurality of grate openings  100 . The plurality of grate openings  100  are configured to allow air to flow from outside the evaporative air cooler  10  to inside the evaporative air cooler  10 . The grate  94  may also have a cord guide for securing the cord of the power adapter in place. The cord guide may be located along one side of the grate  94  and adjacent to the framed portion  64 , or any other desirable location. The grate  94  may have one or more cord guides tabs. Additionally, some of the horizontal ribs  96  may be shorter to allow for the cord to be positioned flush with the horizontal ribs  96 . 
     As illustrated in in  FIGS. 7 and 8 , the fan cover assembly  102  can include the grate  94 , the fan  48 , and a fan cover  46 . The fan cover assembly  102  can be configured to reduce vibration and other movement within the evaporative air cooler  10 . By doing so, the fan cover assembly  102  can reduce the noise of operation of the evaporative air cooler  10 . The fan cover assembly  102  can also efficiently direct airflow. For example, the fan cover assembly  102  can effectively direct air outward from the evaporative air cooler  10 . 
     For example, the fan  48  can direct airflow from the back face  28  toward the front face  26 . The fan  48  can be positioned inside the housing  20  between the grate  94  and the fan cover  46 . The fan cover  46  can be configured to further direct the airflow. For example, the fan cover  46  can provide an optimal volume of air flow for the size and type of the evaporative air cooler  10 . The fan cover  46  can be configured to maximize the technical and electrical specifications of the fan  48 . 
     The user can control the speed of the fan  48 . For example, the user can press the power button  34  to toggle the fan speed between three different speeds (e.g., high, medium, and low speeds). Changing the fan speed can change the water flow rate through the aperture  42 . The change in the water flow rate can be proportional to the change in the fan speed. At the high speed, the water flow rate can be at a high rate. At the medium speed, the water flow rate can be at a medium rate. At the low speed, the water flow rate can be at a low rate. 
     Thus, the misting structure  104  can be configured to produce a variable volume of the mist  118 . The volume of the mist  118  produced can be based on the fan speed. For example, as the fan speed increases, the volume of the mist  118  can increase. The increase in the volume of the mist  118  may allow for an optimal amount of moisture to enter into the air, which can result in a better cooling effect. As the fans speed decreases, so may the mist volume. 
     For example, when the power button  34  is pressed, the evaporative air cooler  10  can turn on. The fan  48  can begin spinning, and the mist  118  can begin to spray from a misting structure  104 . The default fan speed can be the high speed when the evaporative air cooler  10  is first powered ON, or any other desirable fan speed. The user can adjust the cooling effect of the evaporative air cooler  10 , including the amount of the mist  118  and/or the airflow speed using the power button  34 . The user can adjust the airflow direction (e.g., from top to bottom) using the air direction tab  72  on the outlet vent  52 . The power button  34  can be pressed again to turn off the evaporative air cooler  10 . 
     As illustrated in  FIG. 7 , the v-shaped shroud  44  can be positioned on an underside of the top internal panel  110  to allow liquid to transform into the mist  118 . The top internal panel  110  can be a wall between the evaporative air cooler  10  and the water tank  40 , the bottom of the water tank  40 , or any other desirable structure. The v-shaped shroud  44  can be configured to distribute the mist  118  evenly toward the filters  58 . An even distribution of liquid on the filters  58  provides an effective cooling effect for the user. The v-shaped shroud  44  can be configured to maximize airflow to the user. 
     For example, the v-shaped shroud  44  can extend from the bottom of the water tank  40  into the evaporative air cooler  10 . The fan  48  used with the v-shaped shroud  44  can turn the liquid into the mist  118  and direct the mist  118  toward the filter structure  56  and filters  58 . Some of the mist  118  may evaporate, and some of the mist  118  may travel between the sponge material  60  and through outlet vent  52  to cool the air outside of the housing  20 . Some of the mist  118  can soak into the sponge material  60 , allowing for later evaporative cooling. Some of the mist  118  can fall into the water tray  54 , where it can collect and turn into liquid. The liquid can be absorbed into the filters  58  via capillary action, to allow for additional evaporative cooling. The water tray  54  can be constructed with a slight angle. The slight angle can cause excess or unabsorbed liquid to flow toward the filters  58 . The excess liquid can be absorbed by the filters  58  and wicked up, allowing for a longer cooling effect. Also, wicking up the excess water can result in a reduction of water spills if the evaporative air cooler  10  is moved or the drawer  50  is removed from the evaporative air cooler  10 . 
     As illustrated in  FIGS. 4 and 9 , the housing  20  can include a container or a tank, such as the water tank  40  positioned beneath the top face  22 . Liquid, such as water, can be placed into the water tank  40 . For example, when the hinged lid  32  is open, liquid can be poured into the water tank  40  using a pitcher or any other desirable means. The water tank  40  can have an opening, such as the aperture  42 , to release liquid from the water tank  40  into the evaporative air cooler  10 . The aperture  42  can be positioned in the bottom of the water tank  40 . The aperture  42  can be positioned between the v-shaped shroud  44  and the front face  26 . More specifically, the aperture  42  can be positioned between the v-shaped shroud  44  and the filter structure  56 . 
     The evaporative air cooler  10  can use a two-stage cooling for its cooling process. The first stage can incorporate a misting structure  104 . The misting structure  104  can include a microporous mister, such as a mister  106 . The second stage can incorporate a filter structure  56  having an evaporative sponge filter, such as filters  58  made from sponge material  60 . The combination of both stages can produce an instant cooling effect and a prolonged cooling effect. 
     The mister  106  can provide the instant cooling effect. For example, when the evaporative air cooler  10  is powered ON, the mist  118  begins spraying from a mister  106 . The power of the fan  48  can be positioned behind the mist  118  to distribute the mist  118  into the ambient air, or air, and onto the filters  58 . As the mister  106  runs for a continued period of time, the filters  58  may become more wet (e.g., damp filters). The air that encounters the mist  118  can feel cooler to the user due to the evaporative cooling process. As air continually travels through the damp filter  58 , the cooling effect can be prolonged. When the liquid is depleted from the water tank  40 , the mist  118  may cease but the filters  58  can remain wet for a time period, allowing at least some evaporative cooling to continue. 
     The misting structure  104  can be located or partially located within the water tank  40 . For example, the mister  106  can be assembled through the aperture  42  of the water tank  40 . The misting structure  104  can be coupled to the bottom of the water tank  40 , the top internal panel  110 , or any other desirable location using a misting structure coupling  126 . The misting structure coupling  126  can include a screw inserted through a screw hole, or any other desirable attachment. The mister  106  can be positioned upside down within the top-filled water tank  40 . The mister  106  can release water downward into the interior of the evaporative air cooler  10 . Liquid can be fed directly into the mister  106 . The mister  106  can distribute mist  118  (e.g., moisture) to the sponge filter. By misting the filters  58  from an upper portion of the evaporative air cooler  10 , the mist  118  can more effectively soak into the filters  58 . The mister  106  can create an even distribution of the mist  118  to the filters  58 , including to a top portion  112  of the filters  58 . Walls of the water tank  40  can have angles configured to allow for an increased volume of liquid to reach the mister  106 . 
     The mister  106  can be configured to restrict water flow from the aperture  42  when the evaporative air cooler  10  is turned OFF. 
     The misting structure  104  can be wired to the evaporative air cooler  10 . The wires can be soldered to electrically connect the misting structure  104  to the evaporative air cooler  10 , or attached in any other desirable way. The wires can be hidden in the wire compartment or any other desirable compartment within the evaporative air cooler  10 . 
     The evaporative air cooler  10  can operate for a period of time. The period of time may depend on various factors, such as the amount of water in the water tank  40 , whether the filter  58  are presoaked, whether the filters  58  were initially frozen, and a cooling mode selected based on the fan speed. In one embodiment, the evaporative air cooler  10  can operate for eight hours on the high mode, ten hours on the medium mode, and twelve hours on the low mode without refilling the water tank  40 . 
     The evaporative air cooler  10  can include additional and/or fewer components and is not limited to those illustrated in the figures. 
     In an example embodiment, the evaporative air cooler  10  includes the water tank  40 , the misting structure  104 , the filter structure  56 , and the fan  48 . The water tank  40  can include the liquid inlet (e.g., via the hinged lid  32 ) and the liquid outlet (e.g., via the aperture  42 ). Liquid can enter the water tank  40  through the liquid inlet and exit the water tank through the liquid outlet. The misting structure  104  can be in liquid communication with the water tank  40 . The misting structure  104  can be configured to produce mist  118  as the liquid flows through the liquid outlet. The filter structure  56  can include the plurality of filters  58  positioned substantially parallel to each other and defining air gaps  92  between the plurality of filters  58 . The fan  48  can be configured to draw ambient air into the evaporative air cooler  10  and direct the ambient air through the filter structure and out of the evaporative air cooler  10 . Thus, the ambient air can be cooled before exiting the evaporative air cooler  10 . 
     The misting structure  104  can distribute the mist  118  into the ambient air and onto the plurality of filters  58 . The misting structure  104  can include a mister  106 . The mister  106  can be positioned adjacent the water tank  40 . The mister  106  can also be positioned within the water tank  40 . Liquid can flow through a top portion of the mister  106  from the water tank  40  toward a bottom portion of the mister  106 . The mister  106  can project the mist  118  from the misting structure  104  into the ambient air within the evaporative air cooler  10 . The mist  118  can cool the ambient air. 
     The misting structure  104  can produce a first volume of mist  118  when the fan  48  is at a first speed. The misting structure  104  can produce a second volume of mist  118  when the fan is at a second speed. The first volume can be larger than the second volume and the first speed can be faster than the second speed. In other words, when the fan is on high, more mist  118  can spray from the mister  106 . 
     The evaporative air cooler  10  can include an internal assembly  74  configured to form a seal  116  with the fan  48 . The seal  116  can cause the ambient air to exit the evaporative air cooler  10  with a greater force than when entering the evaporative air cooler  10 . The internal assembly  74  can include at least one of the filter structure  56 , and a drawer  50 . The internal assembly  74  can be removably attached to the evaporative air cooler  10 . The internal assembly  74  can comprises a drawer  50  attached to the outlet vent  52 . The drawer  50  can include a water tray  54  angled toward the outlet vent  52 . The filter structure  56  can be positioned on the water tray  54  adjacent the outlet vent  52 . Any condensation or liquid in the drawer  50  can flow toward the outlet vent  52 . The plurality of filters  58  can be formed from sponge-like material, such as sponge material  60 . Thus, if the filter structure  56  is positioned adjacent the outlet vent  52 , the plurality of filters  58  can soak up the liquid as it flows toward the outlet vent  52 . If the plurality of filters  58  are at a liquid capacity, the sponge material  60  may not soak up additional liquid. The liquid in the filters  58  can be used to cool the ambient air. When the liquid in the filters  58  cools the ambient air, the liquid may evaporate from the filters  58 . The filters  58  may not be at the liquid capacity after evaporation occurs and thus, can soak up more liquid. 
     The filter structure  56  can be configured for removal from the evaporative air cooler  10 . The filter structure  56  and the plurality of filters  58  can be washable and reusable. The plurality of filters  58  can be presoaked with liquid and inserted into the evaporative air cooler  10 . Presoaking the filters  58  can prolong the cooling of the evaporative air cooler  10 . 
     The evaporative air cooler  10  can include a shroud, such as the v-shaped shroud  44 , adjacent to the underside of the water tank  40 . The shroud can be v-shaped or any other desirable shape. 
     In an example embodiment, the portable evaporative air cooler  10  for cooling ambient air includes the misting structure  104 , the filter structure  56 , and the fan  48 . The misting structure  104  can be configured to evaporate liquid within the portable evaporative air cooler  10 . The filter structure  56  can include the plurality of filters  58  configured to absorb liquid. The fan  48  can be configured to draw the ambient air into the portable evaporative air cooler  10 . The ambient air can be cooled by at least one of the mist  118  and the filter structure  56 . The fan  48  can direct the ambient air thorough the filter structure  56  and out of the portable evaporative air cooler  10 . 
     The plurality of filters  58  can be formed from a sponge material  60  and positioned to define gaps, such as air gaps  92 , between the plurality of filters  58 . The plurality of filters  58  can be removable from the portable evaporative air cooler  10 . The plurality of filters  58  can be soaked with liquid prior to entering the portable evaporative air cooler  10 . 
     The filter structure  56  can be positioned in a drawer  50 . The drawer  50  can be removable from the portable evaporative air cooler  10 . The portable evaporative air cooler  10  can include a front grill, such as the outlet vent  52 , with the air direction tab  72  for directing air flow and the filter drawer tab  120  for pulling the drawer  50  from the portable evaporative air cooler  10 . 
     In an example embodiment, the personal air cooler  10  comprises the housing  20 , the tank, such as the water tank  40 , the misting structure  104 , the filter structure  56 , and the v-shaped shroud  44 . The housing includes a top panel (e.g., the top face  22 ), a bottom panel (e.g., the bottom face  24 ), and side panels (e.g., the front face  26 , the back face  28 , and the side faces  30 ) that can define an interior of the personal air cooler  10 . The tank can be positioned adjacent the top panel and at least one of the side panels and configured to receive, store, and release liquid. The misting structure  104  can be in fluid communication with the tank and configured to create the mist  118 . The filter structure  56  can be adjacent the bottom panel and at least one of the side panels. The v-shaped shroud  44  can be positioned underneath the tank and configured to direct the mist  118  toward the filter structure  56 . 
     The personal air cooler  10  can include the fan  48  positioned adjacent one of the side panels. The personal air cooler  10  can also include a fan cover  46  adjacent the fan  48  and configured to direct air from outside the personal air cooler  10  toward the v-shaped shroud  44 . The v-shaped shroud  44  can direct mist  118  toward a top portion of the filter structure  56  and through the filter structure  56 . 
     The filter structure  56  can include a plurality of filters  58  positioned substantially parallel to each other. Each of the plurality of filters  58  can be spaced apart a specific distance, such as 1 cm, or any other desirable distance. Thus, the plurality of filters  58  can define a plurality of air gaps  92 . The plurality of filters  58  can store the mist  118 . The air can be cooled by the mist  118 . The cooled air can travels through the air gaps  92  and exit the personal air cooler through one of the side panels. The side panel can be the side panel adjacent the filter structure  56  and include the outlet vent  52 . 
       FIGS. 10-19  illustrate an evaporative air cooler  200  for cooling air. The evaporative air cooler  200  can include the housing  220  with a top face  222 , a bottom face  224 , and four lateral faces, such as a front face  226 , a back face  228 , and side faces  230 . The housing  220  may be formed in the shape of a cube, a cuboid, a half sphere, or any other suitable shape. The housing  220  may be formed from plastic or any other desirable material. 
     The top face  222  can include a lid, such as a lid  232 .  FIGS. 12 and 13  illustrate the evaporative air cooler  200  with the lid  232  opened for access to the tank  240 . The lid  232  can be located along a front portion of the top face  222 . The lid  232  can include a lid tab  276  formed as a back portion of the lid  232  or any other desirable location. The lid  232  can be opened to allow for water to fill the tank  240 . For example, a user can pull the lid tab  276  upward to open the lid  232 . The lid  232  can be formed from plastic or any other desirable material. A tank opening  244  to the tank  240  can be any desirable opening. When in a closed position, the lid  232  can be configured to form a seal over the tank opening  244 . The lid  232  and the tank opening  244  may be ovular or any other suitable shape or configuration. 
     The front face  226  can also include buttons, such as a power button  234  or any other desirable button. The power button  234  can be configured to activate (e.g., power ON), change the fan speed of the fan  248 , and deactivate (e.g., power OFF) the evaporative air cooler  200 . For example, when the power button  234  is first activated, an indicator light  238  can turn ON, the fan  248  can turn ON (e.g., to a high speed), and an aperture  242  positioned in the tank  240  can allow water to flow out of the tank  240  to begin the evaporative air cooling process. When the power button  234  is activated a second time, the fan speed can decrease (e.g., to a medium speed) and the aperture  242  can allow less water to flow out of the tank  240 . When the power button  234  is activated a third time the fan speed can decrease (e.g., to a low speed) and the aperture  242  can allow less water to flow out of the tank  240 . When the power button  234  is activated a fourth time, the indicator light  238  can turn OFF (e.g., no indicator lights  238  remain ON), the fan  248  can turn OFF, and the aperture  242  can stop the water from flowing out of the tank  240 . In other words, the power button  234  can be activated to deactivate, or power OFF the evaporative air cooler  200 . In one embodiment, when the power button  234  is activated (e.g. depressed) for three or more seconds, it can turn OFF the indicator light  238  and the evaporative air cooler  200 . 
     The front face  226  can be configured to emit one or more lights, such as an indicator light  238  or any other desirable light or indicator. The front face  226  may include a semi-transparent section, such as a window  250 . The indicator light  238  may comprise one or more lights, such as a blue LED light, positioned within the tank  240 , or any other desirable area for illuminating the tank  240  and/or the window  250 . The light can be used for ambiance, such as for a nightlight, to indicate fan speed, to indicate that the evaporative air cooler  200  is ON, or any other desirable purpose. The light may be on by default when the evaporative air cooler  200  is powered ON. The brightness of the indicator light  238  may be configured to change. For example, after the power button  234  is pressed, the light may be on a high brightness mode. When the user presses the power button  234  for a second time, the light can reduce its brightness (e.g., to a medium brightness mode). When the user presses the light button for a third time, the light can reduce its brightness (e.g., to a low brightness mode). When the user presses the power button  234  for a fourth time, the indicator light  238  can turn OFF. In one embodiment, if the power button  234  is activated for a minimum amount of time (e.g., three seconds), an illumination setting can be selected and/or locked. 
     The power indicator light  236  may be used to indicate a that the evaporative air cooler  200  is low on battery, charging, or fully charged; whether the filter  258  should be replaced; or any other desirable indication. The power indicator light  236  may display a blinking light or a solid light. The power indicator light  236  may display different light colors, such as green, red, amber, or any other desirable color. 
     The evaporative air cooler  200  can include the housing  220 . The housing  220  can define an interior  254  of the evaporative air cooler  200 . The interior  254  can be configured to receive a filter structure  256 . The filter structure  256  can include a filter frame  282 . The filter frame  282  can be formed from plastic or any other desired material. The filter structure  256  may be square, rectangular, or any other desired shape. The filter frame  282  can include a  330  bottom wall, two side walls  332 , and a top wall  334 . As shown in  FIGS. 15 and 16A -C, the bottom wall  330  can be coupled to a base  336 . The bottom wall  330  can be configured to lock into the base  336 . The bottom wall  330  can include bottom bars  338  that define bottom openings  340 .  FIG. 15  illustrates the filter structure  256  with the second filter  262  removed. The top wall  334  can include an upper top wall  342  and a lower top wall  344 . The upper top wall  342  and the lower top wall  344  can be configured to lock together. The upper and lower top walls  342 ,  344  can define top openings  346 . The upper top wall  342  can comprise one or more slits  370  between the top openings  346 . The lower top wall  344  can comprise one or more bars  368 . Each of the one or more bars  368  can be positioned within one of the one or more slits  370 . The lower top wall  344  can comprise one or more tabs  372 . Each of the one or more tabs  372  can be positioned within one of the top openings  346 . Each of the one or more tabs  372  can comprise a snap  374 . The snap  374  can be configured to overlap the edge of the top opening  346 . The snap  374  can be configured to secure the upper and lower top walls  342 ,  344  into a locked position. The upper and lower top walls  342 ,  344  can couple together via snaps or any other suitable means. The tabs  372  can be configured to angle downward toward a center portion of the filter structure  256 . The tabs  372  can be configured to direct the mist  118 , water, and the like toward the back of the filter structure  256 . When the filter structure  256  is within the interior  254  of the evaporative air cooler  200 , the tabs  372  can direct the water, the mist  118 , and the like toward the fan  248 . 
     The filter structure  256  can comprise one or more filters, such as filters  258 ,  262 . The filter  258  can be positioned through one of the bottom openings  340  from one side of one of the bottom bars  338  to other side of that bottom bar  338 . The filter  258  can be positioned around the top portion of one of one of the top bars  368 . When the upper and lower top walls  342 ,  344  are in a locked position, the filter  258  and the top bars  368  are positioned within the slits  370 . The filter  258  can include this configuration for each of the bars  338 ,  368  to form a zig-zag configuration of the filter  258 . Each of the ends of the filter  258  can couple to one of the side walls  332 , the bottom wall  330 , or any other suitable component. For example, the side walls  332  can include hooks  364  and each of the ends of the filter  258  can include an opening configured for insertion of one of the hooks  364 . 
     The filter structure  256  can include a filter holder  284 . The filter holder  284  can be coupled to the filter frame  282 . For example, the filter holder  284  can be snapped to each of the side walls  332  of the filter frame  282 . The filter holder  284  can be coupled to the filter frame  282  at a middle portion of each of the side walls  332 . The filter structure  256  can be configured for removal from the interior  254 . The filter holder  284  can include a pull tab  272 . The pull tab  272  can be positioned on a front side  348  of the filter structure  256 . The pull tab  272  can be configured for a user to pull the pull tab  272  to remove the filter structure  256  from the interior  254  of the housing  220  and/or to insert the filter structure  256  into the interior  254 . In this example, the user can remove a grill  252  from the housing  220  and pull the pull tab  272  to remove the filter structure  256 . The filter structure  256 , including the filters  258 ,  262  can be reusable. The filter structure  256  and the filters  258 ,  262  can be washed. The filter structure  256  and the filters  258 ,  262  can be replaced. 
     The interior  254  can include filter structure stoppers  308 . The filters structure stoppers  308  can be coupled or formed into interior portions of the side faces  230  and/or the back face  228 . The filter structure stoppers  308  can be formed from plastic or any other desired material. The filter structure stoppers  308  can be configured to position the filter structure  256  into a desired position within the interior  254 . In other words, the filter structure stoppers  308  stop and/or generally hold the filter structure stoppers  308  into place adjacent to, but not touching the fan  248 . As illustrated in  FIGS. 15 and 16A -C, the filter structure  256  can comprise filter structure stopper tabs  310  coupled to or formed into the front side portions of the filter structure  256 . The filter structure stopper tabs  310  can be formed from plastic or any other desired material. The filter structure stopper tabs  310  can be configured to position the filter structure  256  into a desired position within the interior  254 . In other words, the filter structure stopper tabs  310  stop and/or generally hold the filter structure stoppers  308  into place adjacent to, but not touching the fan  248 . 
     The filter holders  284  can include bars  296  that define openings, such as slits  298 . The bars  296  of the filter holders  284  extend from one side of the filter holder  284  to the opposing side of the filter holder  284 . The filter  258  can be positioned through each of the filter holders  284 . The filter holder  284  can provide additional support for securing the filter  258  to the filter frame  282 . The filter holder  284  can further assist in maintaining the configuration of the filter  258  in the zig-zag formation when the filter  258  is dry, damp, wet, or a combination thereof. 
     A second filter  262  can be coupled to at least a portion of a perimeter  302  of the filter structure  256 . In one embodiment, the second filter  262  is positioned adjacent the outer perimeter  302  of the top wall  334  and the side walls  332 . Each of the ends of the second filter  262  can be coupled to the a bottom portion of each of the side walls  332 . For example, the side walls  332  can include hooks  364  and each of the ends of the second filter  262  can include an opening configured for insertion of one of the hooks  364 . The second filter  262  can be configured to absorb the mist  118 . The second filter  262  can be formed from the same material as the filter  258 , such as the sponge material  260 , or any other suitable material. The second filter  262  can be in fluid communication with the filter  258 . The filter  258  can absorb the liquid and/or mist  118  absorbed by the second filter  262 . For example, portions of the filter  258  can be positioned through the top wall  334  of the filter structure  256  and are adjacent to the second filter  262  positioned adjacent to the top wall  334  (e.g., along the perimeter  302  of a portion of the filter frame  282 ). The filters  258 ,  262  may be touching or in close proximity to each other. The second filter  262  can be coupled to the two side walls  332 , the bottom wall  330 , any other suitable wall, or combination thereof. In one embodiment, the filters  258 ,  262  are the same filter. In another embodiment, the second filter  262  is not included in the filter structure  256 . 
     The filter  258  can be configured in a zig-zag formation and define air gaps  292 . The filter  258  can be configured to store liquid, such as mist  118 , water, any other suitable liquid, or combination thereof. The filter is configured to absorb the mist  118  from the mister, absorb liquid from being pre-soaked, store liquid via being frozen, or any other suitable means to absorb or store liquid. The air gaps  292  are configured to allow for air to flow through the filter structure  256 , contact the filters  258 ,  262  to cool the air, and exit the interior  254 . 
     The filter structure  256  can include a fan cover  246 . The fan cover  246  can be coupled to a back side  278  of the filter structure  256 . The fan cover  246  can be positioned adjacent the fan. The fan cover  246  can be configured to direct air from the fan toward the filter structure  256 . The fan cover  246  can be configured to form a suction with the fan, such as to provide additional force in directing the air from outside of the housing  220  through the fan cover  246 , the filter structure  256 , and the grill  252 . In this way, the fan cover  246  can be configured to direct air flow through the interior  254  of the evaporative air cooler  200 . 
     The fan  248  can be positioned adjacent one of the sides of the housing  220 , such as the back face  228 . The fan  248  can be configured to draw the air into the evaporative air cooler  200 , such as through grate openings  300  in the back face  228  of the housing  220 . The air can be cooled by at least one of the mist  118  and the filters  258 ,  262 . The fan  248  can include blades  264 . The fan  248  may include four blades  264  or any other suitable number of blades. The fan  248  may include a motor  266 . The motor  266  can be used to control the fan  248  to rotate the blades  264 . The motor  266  can rotate the blades  264  at various speeds. The speed of rotation of the blades  264  can change the amount (e.g., volume) of air and the speed for which the air flows through the filter structure  256  and out of the interior  254  of the evaporative air cooler  200 . The evaporative air cooler  200  can include different levels of speed, each of which can be configured to direct air. A higher level may direct a larger amount of air at a first speed. A mid-range level may direct a mid-range amount of air at a second speed. A lower level may direct a lower amount of air at a third speed. The first speed may be greater than the second speed. The second speed may be greater than the third speed. The evaporative air cooler  200  can be configured to have predefined speeds, a variable speed, or any combination thereof. 
     The fan  248  can be wired to the evaporative air cooler  200 . The wire  322  can be soldered to electrically connect the fan  248  to the evaporative air cooler  200 , or attached in any other desirable way. The wire  322  can be hidden in a wire compartment or any other desirable compartment within the evaporative air cooler  200 . 
     As illustrated in  FIG. 18 , the back face  228  can include a grate  294  defining grate openings  300 . The grate openings  300  can be configured throughout the grate  294 . The grate  294  can be a portion of the back face  228 , such as a central portion of the back face  228 . The grate  294  can be a rectangle, a square, a circle, an oval, or any other suitable shape. The grate openings  300  can include one or more shapes (e.g., circular, rectangular, ovular, any other suitable shape, or combination thereof). Air, such as ambient air, can enter from outside of the housing  220  through the grate openings  300  of the grate  294  and into the interior  254  of the evaporative air cooler  200 . The grate  294  may be configured to protrude from the back face  228 . The fan  248  can be coupled to the back face  228 . More specifically, the grate  294  may include a fan coupling  288  to couple to the fan  248 . The protrusion of the grate  294  from the back face  228  can be configured for housing the fan  248 . 
     The evaporative air cooler  200  can be powered by a power source, such as a battery or any other suitable power source. The battery can be a rechargeable battery, such as a Lithium-ion battery (LIB) or any other rechargeable power source. The evaporative air cooler  200  can include a charging port (not shown) to charge the rechargeable battery. The charging port can be disposed on the back face  228  or any other desirable location on the evaporative air cooler  200 . The charging port (not shown) can be configured to receive the charger  268 . The evaporative air cooler  200  can operate using a rechargeable battery and/or when plugged into an electrical outlet. 
     As illustrated in  FIGS. 14 and 17 , the front face  226  of the housing  220  may define an opening, such as a front opening  286 . The grill  252  can be coupled to the front face  226  to cover the front opening  286 . The grill  252  may include grill tabs  274  configured to secure the grill  252  to the housing  220 . The grill tabs  274  may be couple to or formed into the grill  252 . The grill tabs  274  may be positioned in each of the corners of the grill  252 . The grill  252  can be configured to removably couple to the front face  226  of the housing  220 . Each of the grill tabs  274  can be inserted into one of the openings  324  in the housing  220 . The openings  324  can be located in the bottom face  224 , the frong face  226 , or any other desired location in the housing  220 . When coupled to the housing  220 , the grill  252  can provide a front side to the housing  220 . The grill  252  can include vents  270  (e.g., bars). The vents  270  may be configured in a horizontal configuration, an angled configuration, any other suitable configuration, or combination thereof. The vents  270  may be stationary. The vents  270  can be configured to rotate. Each of the vents  270  may be aligned parallel to one another such that the vents  270  are configured to allow for air to pass through the vents  270 . 
     The evaporative air cooler  200  can include an angling member  210 . The angling member can be coupled to the housing  220 . The angling member can include arms  352 ,  354  and a base  356 . A first arm can be rotatably coupled to one of the side faces  230  of the housing  220 . A second arm  354  can be rotatably coupled to the opposing side face  230 . In one embodiment, the first and second arms  352 ,  354  couple to a center portion of the side faces  230 . The arms may be coupled to the sides via a coupling  358 , such as a ratchet system or any other desired rotatable attachment. The angling member can be configured to rotate the housing  220 . The angling member can rotate the housing  220  to position the housing  220  in an angle that a user desires. The angling member can be configured to rotate the housing  220  in a vertical direction. The angling member  210  can be configured to rotate the housing  220  360 degrees. The angling member  210  can maintain a position, or angle, of the housing  220  relative to the angling member  210 . For example, if a user would like the evaporative air cooler  200  to blow cool air toward the user&#39;s face, the user may rotate the housing  220  upward to direct the cooled air upward. Similarly, the user can rotate the housing  220  downward to direct the cooled air downward. The arms  352 ,  354  can be coupled to the sides such that the housing  220  is stationary and cannot be rotated about the arms. 
     The first and second arms  352 ,  354  can protrude from either side of the base  356 . The first and second arms  352 ,  354  can be formed with the base  356  or coupled to the base  356 . The base  356  can be formed from plastic or any other suitable material. The base  356  can be coupled to a clip  202  via a coupling  360 , such as a ratchet system or any other desired rotatable attachment. The coupling  360  can be configured to rotate housing  220  via the base  356  in either direction (e.g., to the right or to the left) 360 degrees or any other desirable degree rotation. 
     The evaporative air cooler  200  can include a fastener, such as the clip  202 . The clip  202  can be a device that is rotatable or worked by a spring  380  for holding an object or objects together or in place. For example, the clip  202  can be configured to removably couple the evaporative air cooler  200  to the handle  206  of the stroller  204 , the countertop  208 , a desk, a table, or any other suitable object. The clip  202  may include grips  382 ,  384  on one or more components of the clip  202 . For example, the grip  382  may be configured on a grip side  388  of the clip  202  and the grip  384  may be configured on a grip side  390  of a clip base  376 . The grips  382 ,  384  can be configured to more securely attach the evaporative air cooler  200  to the object. The grips  382 ,  384  can be formed from rubber, plastic, or any other desired material. The grips  382 ,  384  may be formed as ridges and/or a smooth surface. The smooth surface may be configured to protect the object to which the clip  202  attaches to, such that the clip  202  does not damage (e.g., scrape, scratch, etc.) the object. 
     The clip  202  can be coupled to the clip base  376  via a coupling  392 . The coupling  392  can comprise a rod  386  configured for insertion into rod holders  394 ,  396 . The rod holders  394  can be coupled to or formed at the end of one of the sides of the clip. The rod holders  396  can be coupled to or formed on the grip side  390  of the base. Each of the rod holders  394 ,  394  can define an opening for the rod  386  to insert through. A spring  380  can define an opening be configured for the rod  386  to insert through. The spring  380  can provide tension to the clip  202  relative to the clip base  376 . In a closed position, the clip  202  may be configured such that one end of the clip  202  (e.g., a grip end  398 ) extends further than the clip base  376 . The grip end  398  is configured for a user to rotate the clip  202  by exerting force on the grip end  398  to rotate the clip  202  about the coupling  392 . The user can open the clip  202  for an object to be inserted into the clip  202 . When the user releases the clip  202 , the tension provided by the spring  380  couples the clip  202  to the object and secures the evaporative air cooler  200  into the desired place. 
     The clip  202  can include one or more support members  400 . The one or more support members  400  can be configured on opposing sides of the clip  202 , along the clip  202 , or any other desired position. The one or more support members  400  can be configured to support the evaporative air cooler  200  in an upright position when the clip  202  is in a closed position. In other words, the the one or more support members  400  support the evaporative air cooler  200  so that the evaporative air cooler  200  does not easily tip over when it is placed on a surface. Similarly, the clip base  376  may comprise a front face  378  configured to provide support for the evaporative air cooler  200  when the evaporative air cooler  200  is placed on a surface (e.g., with the clip in the closed position). The front face  378  may protect components of the coupling  392  from being damaged. For example, the front face  378  can stop the clip  202  from being rotated too far such that the spring  380  is overextended. 
     The clip  202  can be coupled to the angling member  210 . Specifically, the clip base  376  can be coupled to the base  356  of the angling member.  210  The clip base  376  can be rotatably coupled to the base  356 , such as to a bottom portion of the base  356 . The clip base  376  may be coupled to the base  356  via the coupling  360 , such as a ratchet system or any other desired rotatable attachment. The base  356  can be configured to rotate the housing  220  about the clip base  376  in a horizontal direction. The base  356  can rotate about the clip base  376  in either direction horizontally 0-360 degrees. For example, a user can attach the evaporative air cooler  200 , via the clip  202 , to the countertop  208 . The user can rotate the housing  220  of the evaporative air cooler  200  horizontally, via the base  356 , toward the user. The user can further rotate the housing  220  vertically, via the angling member  210 , toward the user. In this way, when the evaporative air cooler  200  is turned on, the cooled air can be directed toward the user. In another embodiment, the housing  220  can be coupled to the angling member  210  and the base  356  can be coupled to the clip base  376  such that the housing  220  is stationary and cannot be rotated in horizontal and/or vertical directions. 
     As illustrated in  FIGS. 13 and 14 , the evaporative air cooler  200  can include a tank  240 . The tank  240  can be positioned adjacent to a top face  222  of the housing  220 . Portions of the interior of the top face  222 , the front face  226 , the back face  228 , and the side faces  230  of the housing  220  may form portions of the tank  240 . For example, the tank  240  can be configured within the housing  220  such that the top portion of the tank  240  is an underside of the top face  222  of the housing  220 . The tank  240  can include a front side and a bottom side coupled to the housing  220 . The front side and the bottom side of the tank  240  may comprise the window  250 . A light, such as the power indicator  236  can be disposed adjacent to the bottom side of the tank  240 , or any other desired location. The bottom side of the tank  240  and the front portion of the tank  240  may comprise the window  250  and be configured to emit light produced by the power indicator  236  throughout the tank  240 . The power indicator  236  may also be configured to emit light into the interior  254  and toward the outside of the evaporative air cooler  200 . 
     The tank  240  can include a liquid inlet  312  and a liquid outlet  314 . The top portion of the housing  220  can define an opening, such as liquid inlet  312 . The liquid inlet  312  can be ovular, circular, or any other desirable shape. The bottom portion of the tank  240  can define an opening, such as the liquid outlet  314 . The liquid outlet can be ovular, circular, or any other desirable shape. The liquid outlet  314  can be positioned in the bottom of the tank  240 . The liquid outlet  314  can be positioned in a central location in the bottom of the tank  240 . The liquid outlet can be positioned adjacent a filter structure  256 . The liquid outlet  314  can be configured to receive a misting structure  304  comprising a mister  306 . Liquid, such as water, can enter the tank  240  through the liquid inlet  312  and exit the tank  240  through the liquid outlet  312 . In response to the liquid flowing through the liquid outlet  314 , the mister  306  can be configured to create, from the liquid, a mist in the interior  254  of the evaporative air cooler  200 . 
     As illustrated in  FIGS. 12 and 13 , a lid  232  can be coupled to the top face  222 , or any other suitable portion of the housing  220 . The lid  232  can be coupled to the top face  222  via a hinge, a cord, or any other suitable attachment. A portion of the lid  232  can be configured to fit within the liquid inlet  312 . For example, if the liquid inlet  312  is an oval shape, the lid  232  can be a slightly smaller oval shape so as to fit within the liquid inlet  312  and form a seal  316  when the lid  232  is in a closed position. The lid  232  may include an ovular seal  316  to form a seal with the liquid inlet  312  such that liquid remains in the tank  240 . The lid  232  may be formed from plastic or any other desirable material. The seal  316  may be formed from rubber or any other desirable material. The tank  240  can be configured to receive, store, and release liquid. For example, when the lid  232  is open (see  FIG. 13 ), liquid can be poured into the tank  240  using a pitcher, a faucet, a water bottle, or any other desirable filling means. 
     The mister  306  can be positioned adjacent the tank  240 . The mister  306  can be coupled to the liquid outlet  314 . The mister  306  can be in fluid communication with the tank  240 . Liquid can flow through a top portion of the mister  306  from the tank  240  toward a bottom portion of the mister  306 . The mister  306  can be configured to create the mist  118  from the liquid stored in the tank  240 . The mister  306  can distribute the mist  118  into the air into the interior  254  of the evaporative air cooler  200  and onto a filter, such as the second filter  262 . The mist  118  can cool the air within the interior  254 . 
     When the evaporative air cooler  200  is operating, the mister  306  can produce mist  118 . For example, the mister  306  can be configured to create a first volume of mist  118  when a fan  248  is at a first speed. The mister  306  can be configured to create a second volume of mist  118  when the fan  248  is at a second speed (the aperture  242  of the misting structure  304  can allow less water to flow out of the tank  240 ). The mister  306  can be configured to create a third volume of mist  118  when the fan  248  is at a third speed. The first volume can be greater than the second volume and the first speed can be faster than the second speed. In other words, when the fan  248  is on high, a higher volume of mist  118  can spray from the mister  306 . Similarly, the first and second volumes can be greater than the third volume and the first and second speeds can be faster than the third speed. The evaporative air cooler  200  can have a button, such as the power button  234 , for controlling the speed of the fan  248 . For example, when the power button  234  is engaged a first time, the fan  248  can operate at the first speed. When the power button  234  is engaged for a second time, the fan  248  can operate at the second speed. When the power button  234  is engaged for a third time, the fan  248  can operate at the third speed. When the power button  234  is engaged for a fourth time, the fan  248  can turn off (i.e., to end operation of the fan  248 ). The evaporative air cooler  200  may have any number of speeds and is not limited to those described in this disclosure. The evaporative air cooler  200  can have a light (e.g., the power indicator  236 ), such as an LED light or any other desired light, to indicate that the evaporative air cooler  200  is operating. The power indicator  236  can be configured to indicate the speed of operation. 
     The evaporative air cooler  200  can include a safety interlock  320 . The safety interlock  320  can be configured to prevent operation of the evaporative air cooler  200 . For example, if at least one of the grill  252  and the filter structure  256  is removed from the housing  220 , the safety interlock  320  can shut off operation of the evaporative air cooler  200 . The safety interlock  320  can function as a safety feature such that a user does not touch the blades of the fan while the fan is spinning in operation. 
     In one embodiment, the evaporative air cooler  200  for cooling air comprises the housing  220 , the tank  240 , the mister, the filter structure  256 , the fan, and a clip  202 . The housing  220  defines the interior of the evaporative air cooler  200 . The tank  240  is positioned adjacent to the top portion of the housing  220 . The tank  240  is configured to receive, store, and release liquid. The mister is configured to be in fluid communication with the tank  240 . The mister is configured to create a mist  118  from the liquid. The mist  118  can be created in the interior. The filter structure  256  includes a filter. The filter is configured to absorb the mist. The fan is configured to draw the air into the interior. The air is cooled by at least one of the mist  118  and the filter. The fan directs the air through the filter structure  256  and out of the evaporative air cooler  200 . The clip  202  coupled to the housing  220 . The angling member coupled to the housing  220 . The angling member is configured to rotate the housing  220 . The angling member is configured to rotate the housing  220  in at least one of a vertical direction and a horizontal direction. The angling member is configured to rotate the housing  220  0-360 degrees in a vertical direction. The angling member is configured to rotate the housing  220  0-360 degrees in a horizontal direction. The clip  202  is configured to removably couple the evaporative air cooler  200  to an object. This embodiment may have fewer or additional features and is not limited to this configuration. 
     In another embodiment, the evaporative air cooler  200  for cooling air comprises the housing  220 , the tank  240 , the mister, the filter structure  256 , the fan, and a clip  202 . The housing  220  defines the interior of the evaporative air cooler  200 . The tank  240  is positioned adjacent to the top portion of the housing  220 . The tank  240  is configured to receive, store, and release liquid. The mister is configured to be in fluid communication with the tank  240 . The mister is configured to create a mist  118  from the liquid. The mist  118  can be created in the interior. The filter structure  256  includes a filter and a second filter. The filter and the second filter are configured to absorb the mist. The filter is configured in a zig-zag formation and defines air gaps. The second filter is coupled to at least a portion of a perimeter  302  of the filter structure  256 . The second filter is in fluid communication with the filter. The fan is configured to draw the air into the interior. The air is cooled by at least one of the mist, the filter, and the second filter. The fan directs the air through the filter structure  256  and from the interior. The clip  202  coupled to the housing  220 . This embodiment may have fewer or additional features and is not limited to this configuration. 
     Consistent with the above disclosure, the examples of systems and method enumerated in the following clauses are specifically contemplated and are intended as a non-limiting set of examples. 
     Clause 1. An evaporative air cooler for cooling ambient air, comprising: 
     a housing with a top panel, a bottom panel, and side panels defining an interior of the evaporative air cooler; 
     a tank positioned adjacent the top panel and at least one of the side panels, wherein the tank is configured to receive, store, and release liquid; 
     a misting structure comprising a mister and a misting structure coupling, wherein the misting structure is configured to create a mist within the evaporative air cooler; 
     a filter structure with a plurality of filters, wherein the plurality of filters are configured to absorb the mist; and 
     a fan configured to draw the ambient air into the evaporative air cooler, wherein the ambient air is cooled by at least one of the mist and the filter structure, and wherein the fan directs the ambient air thorough the filter structure and from the interior. 
     Clause 2. The evaporative air cooler of any preceding clause, wherein the plurality of filters are formed from a sponge material and positioned to define gaps between the plurality of filters. 
     Clause 3. The evaporative air cooler of any preceding clause, wherein the filter structure is positioned in a drawer; and 
     wherein the drawer is removable from the evaporative air cooler. 
     Clause 4. The evaporative air cooler of any preceding clause, further comprising a front grill with a tab for pulling the drawer from the evaporative air cooler. 
     Clause 5. The evaporative air cooler of any preceding clause, wherein the plurality of filters are removable from the evaporative air cooler and configured to be soaked with liquid prior to entering the evaporative air cooler. 
     Clause 6. The evaporative air cooler of any preceding clause, wherein the plurality of filters are aligned parallel to each other and define air gaps between the plurality of filters; and 
     wherein the ambient air is cooled before exiting the evaporative air cooler. 
     Clause 7. The evaporative air cooler of any preceding clause, wherein the misting structure distributes the mist into the ambient air and onto the plurality of filters. 
     Clause 8. The evaporative air cooler of any preceding clause, wherein the tank comprises a liquid inlet and a liquid outlet; 
     wherein liquid enters the tank through the liquid inlet and exits the tank through the liquid outlet; 
     wherein the misting structure is in liquid communication with the tank and configured to create a mist as the liquid flows through the liquid outlet; and 
     wherein the mister is positioned within the tank wherein the liquid flows from the tank toward the mister. 
     Clause 9. The evaporative air cooler of any preceding clause, wherein the misting structure creates a first volume of mist when the fan is at a first speed; and 
     wherein the misting structure creates a second volume of mist when the fan is at a second speed. 
     Clause 10. The evaporative air cooler of any preceding clause, wherein the first volume is larger than the second volume; and 
     wherein the first speed is faster than the second speed. 
     Clause 11. The evaporative air cooler of any preceding clause, further comprising: 
     an internal assembly configured to form a seal with the fan, wherein the seal causes the ambient air to exit the evaporative air cooler with a greater force than when entering the evaporative air cooler. 
     Clause 12. The evaporative air cooler of any preceding clause, wherein the internal assembly comprises the filter structure and a drawer. 
     Clause 13. The evaporative air cooler of any preceding clause, wherein the filter structure is configured for removal from the interior; and 
     wherein the filter structure and the plurality of filters are washable and reusable. 
     Clause 14. The evaporative air cooler of any preceding clause, wherein the plurality of filters are formed from sponge-like material. 
     Clause 15. The evaporative air cooler of any preceding clause, further comprising: 
     a shroud adjacent to an underside of the tank, wherein the shroud is v-shaped. 
     Clause 16. An evaporative air cooler for cooling ambient air, comprising: 
     a housing with a top panel, a bottom panel, and side panels defining an interior of the evaporative air cooler; 
     a tank positioned adjacent to the top panel and at least one of the side panels and configured to receive, store, and release liquid; 
     a misting structure comprising a mister and a misting structure coupling, wherein the misting structure is in fluid communication with the tank, and wherein the misting structure is configured to create a mist within the evaporative air cooler; 
     a filter structure with a plurality of filters, wherein the plurality of filters are configured to absorb the mist, and wherein the filter structure is adjacent to the bottom panel and at least one of the side panels; 
     a fan configured to draw the ambient air into the evaporative air cooler, wherein the ambient air is cooled by at least one of the mist and the filter structure, and wherein the fan directs the ambient air through the filter structure and from the interior; and 
     a v-shaped shroud positioned underneath the tank and configured to direct the mist toward the filter structure. 
     Clause 17. The evaporative air cooler of any preceding clause, further comprising: 
     a fan cover adjacent to the fan and configured to direct air from outside the evaporative air cooler toward the v-shaped shroud, wherein the fan is positioned adjacent to at least one of the side panels. 
     Clause 18. The evaporative air cooler of any preceding clause, wherein the v-shaped shroud directs the mist toward a top portion of the filter structure and through the filter structure. 
     Clause 19. The evaporative air cooler of any preceding clause, wherein the filter structure comprises a plurality of filters aligned parallel to each other and defining air gaps; 
     wherein the plurality of filters stores the mist; and 
     wherein air is cooled by the mist, travels through the air gaps, and exits the evaporative air cooler through one of the side panels. 
     Clause 20. The evaporative air cooler of any preceding clause, further comprising: 
     an internal assembly attached to one of the side panels, wherein the one of the side panels is configured to detach from the evaporative air cooler; 
     wherein the internal assembly comprises a drawer attached to the one of the side panels; 
     wherein the drawer includes a water tray angled toward the one of the side panels; and 
     wherein the filter structure is positioned on the water tray, and the filter structure is positioned adjacent to the one of the side panels. 
     Clause 21. An evaporative air cooler for cooling air, comprising: 
     a housing defining an interior of the evaporative air cooler; 
     a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; 
     a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; 
     a filter structure with a filter, wherein the filter is configured to absorb the mist; 
     a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist and the filter, and wherein the fan directs the air through the filter structure and from the interior; and 
     a clip coupled to the housing. 
     Clause 22. The evaporative air cooler of any preceding clause, wherein the filter is formed from a sponge material. 
     Clause 23. The evaporative air cooler of any preceding clause, wherein the filter is configured in a zig-zag formation and defines air gaps. 
     Clause 24. The evaporative air cooler of any preceding clause, further comprising a second filter coupled to at least a portion of a perimeter of the filter structure, wherein the second filter is configured to absorb the mist. 
     Clause 25. The evaporative air cooler of any preceding clause, wherein the second filter is in fluid communication with the filter. 
     Clause 26. The evaporative air cooler of any preceding clause, wherein the filter structure is configured for removal from the interior; 
     wherein the filter structure and the filter are washable and reusable; and 
     wherein the filter is configured to store liquid. 
     Clause 27. The evaporative air cooler of any preceding clause, further comprising an angling member coupled to the housing, wherein the angling member is configured to rotate the housing. 
     Clause 28. The evaporative air cooler of any preceding clause, wherein the angling member is configured to rotate the housing in at least one of a vertical direction and a horizontal direction. 
     Clause 29. The evaporative air cooler of any preceding clause, wherein the angling member is configured to rotate the housing 360 degrees. 
     Clause 30. The evaporative air cooler of any preceding clause, wherein the clip is coupled to the angling member. 
     Clause 31. The evaporative air cooler of any preceding clause, wherein the clip is configured to removably couple the evaporative air cooler to an object. 
     Clause 32. The evaporative air cooler of any preceding clause, further comprising a grill configured to removably couple to the housing. 
     Clause 33. The evaporative air cooler of any preceding clause, further comprising a safety interlock configured to prevent operation of the evaporative air cooler if at least one of the grill and the filter structure is removed from the housing. 
     Clause 34. The evaporative air cooler of any preceding clause, wherein the tank comprises a liquid inlet and a liquid outlet; 
     wherein liquid enters the tank through the liquid inlet and exits the tank through the liquid outlet; and 
     wherein, in response to the liquid flowing through the liquid outlet, the mister is configured to create the mist. 
     Clause 35. The evaporative air cooler of any preceding clause, further comprising: 
     a fan cover adjacent to the fan, wherein the fan cover is configured to direct the air from the fan toward the filter structure. 
     Clause 36. An evaporative air cooler for cooling air, comprising: 
     a housing defining an interior of the evaporative air cooler; 
     a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; 
     a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; 
     a filter structure with a filter, wherein the filter is configured to absorb the mist; 
     a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist and the filter, and wherein the fan directs the air through the filter structure and from the interior; 
     an angling member coupled to the housing, wherein the angling member is configured to rotate the housing; and 
     a clip coupled to the angling member. 
     Clause 37. The evaporative air cooler of any preceding clause, wherein the angling member is configured to rotate the housing in at least one of a vertical direction and a horizontal direction. 
     Clause 38. The evaporative air cooler of any preceding clause, wherein the clip is configured to removably couple the evaporative air cooler to an object. 
     Clause 39. An evaporative air cooler for cooling air, comprising: 
     a housing defining an interior of the evaporative air cooler; 
     a tank positioned adjacent to a top portion of the housing, wherein the tank is configured to receive, store, and release liquid; 
     a mister in fluid communication with the tank, wherein the mister is configured to create a mist from the liquid; 
     a filter structure with a filter and a second filter, wherein the filter and the second filter are configured to absorb the mist; 
     a fan configured to draw the air into the interior, wherein the air is cooled by at least one of the mist, the filter, and the second filter, and wherein the fan directs the air through the filter structure and from the interior; and 
     a clip coupled to the housing. 
     Clause 40. The evaporative air cooler of any preceding clause, wherein the filter is configured in a zig-zag formation and defines air gaps; 
     wherein the second filter is coupled to at least a portion of a perimeter of the filter structure; and 
     wherein the second filter is in fluid communication with the filter. 
     No part of the description in this application should be read as implying that any particular element, step, or function is an essential element that must be included in the claim scope. The scope of patented subject matter is defined only by the claims. Moreover, none of the claims is intended to invoke 35 U.S.C. § 112(f) unless the exact words “means for” are followed by a participle. 
     The foregoing description, for purposes of explanation, use specific nomenclature to provide a thorough understanding of the described embodiments. However, it should be apparent to one skilled in the art that the specific details are not required to practice the described embodiments. Thus, the foregoing descriptions of specific embodiments are presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the described embodiments to the precise forms disclosed. It should be apparent to one of ordinary skill in the art that many modifications and variations are possible in view of the above teachings. 
     While the disclosure has been described in connection with certain embodiments, it is to be understood that the disclosure is not to be limited to the disclosed embodiments but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims, which scope is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures as is permitted under the law.