Patent Publication Number: US-2022220975-A1

Title: Columnar air moving devices, systems and methods

Description:
RELATED APPLICATIONS 
     This application is a continuation of U.S. application Ser. No. 16/926,269 filed Jul. 10, 2020, titled COLUMNAR AIR MOVING DEVICES, SYSTEMS AND METHODS, which is a continuation of U.S. application Ser. No. 16/250,426, filed Jan. 17, 2019, titled COLUMNAR AIR MOVING DEVICES, SYSTEMS AND METHODS, now U.S. Pat. No. 10,724,542, which is a continuation of U.S. application Ser. No. 14/729,905, filed Jun. 3, 2015, titled COLUMNAR AIR MOVING DEVICES, SYSTEMS AND METHODS, now U.S. Pat. No. 10,221,861 issued on Mar. 5, 2019, which claims the benefit of U.S. Provisional Application No. 62/008,776, filed Jun. 6, 2014, titled COLUMNAR AIR MOVING DEVICES, SYSTEMS AND METHODS. The entire contents of the above-identified patent applications are incorporated by reference herein and made a part of this specification for all purposes. Any and all priority claims identified in the Application Data Sheet, or any correction thereto, are hereby incorporated by reference under 37 CFR § 1.57. 
    
    
     FIELD OF THE INVENTIONS 
     The present application relates generally to systems, devices and methods for moving air that are particularly suitable for creating air temperature de-stratification within a room, building, or other structure. 
     DESCRIPTION OF THE RELATED ART 
     The rise of warm air and the sinking of cold air can create significant variation in air temperatures between the ceiling and floor of buildings with conventional heating, ventilation and air conditioning systems. Air temperature stratification is particularly problematic in large spaces with high ceilings such as grocery stores, warehouses, gymnasiums, offices, auditoriums, hangers, commercial buildings, residences with cathedral ceilings, agricultural buildings, and other structures, and can significantly increase heating and air conditioning costs. Structures with both low and high ceiling rooms can often have stagnant or dead air, as well, which can further lead to air temperature stratification problems. 
     SUMMARY 
     An aspect of at least one of the embodiments disclosed herein includes the realization that it can be desirable to de-stratify air in a localized manner. For example, it is desirable to de-stratify air between coolers or freezer aisles in a grocery store setting without moving warm air directly onto the coolers or freezers. 
     Therefore, it would be advantageous to not only have an air de-stratification device that is designed to de-stratify the air in a room and reduce pockets of high temperature near the ceiling, but also to have an air de-stratification device that directs air in a localized, elongate pattern. De-stratifying air in a localized, elongate pattern could permit use of fewer air moving devices in a given aisle or other narrow area while reducing the amount of air passage to areas adjacent the aisle of narrow area. In some embodiments, de-stratifying air in such a pattern can reduce overall energy requirements to maintain a given temperature in the aisles or other narrow areas of a grocery store or other enclosure. 
     In some cases, de-stratifying air in an elongate pattern can warm the environment in the aisles (e.g., freezer aisles) of a grocery store while reducing or eliminating movement of air directly onto freezers or other refrigeration devices adjacent to the aisles. Warming up the aisles of a grocery store can increase comfort for shoppers and, thus allows for more time for the shopper to spend in the aisles actually buying products. Increasing the time shoppers spend in the grocery aisles can increase sales for the entire grocery store. 
     In some embodiments, de-stratifying air in the aisles of a freezer or refrigeration section of a grocery store can reduce or eliminate fogging or other condensation on the display windows of the freezer or refrigerator units. In some cases, de-stratifying the air in these aisles can dry up water on the floor of the aisle. Drying the aisle floors can reduce hazards in the grocery store and/or reduce the store&#39;s exposure to liability due to the condensation from the windows which may cause a slippery floor. 
     Thus, in accordance with at least one embodiment described herein, a columnar air moving device can include a housing. The housing can have a first end and a second end. In some embodiments, the housing has a longitudinal axis extending between the first end and the second end. The air moving device can include an impeller. The impeller can be rotatably mounted within the housing adjacent the first end of the housing. In some embodiments, the impeller has one or more rotor blades capable of directing a volume of air toward the second end of the housing. In some cases, the impeller is configured to rotate about an axis (e.g., a rotational axis) parallel or coincident to the longitudinal axis of the housing. The air moving device can include a nozzle. The nozzle can be mounted in the housing between the impeller and the second end of the housing. The nozzle can have an inlet with a circular cross-section. In some embodiments, the nozzle has an outlet with an oblong cross-section. The oblong cross-section can have a major axis and a minor axis. In some cases, one or more stator vanes are positioned within the nozzle. In some embodiments, at least one of the stator vanes has a first end at or adjacent to the inlet of the nozzle and a second end at or adjacent to the outlet of the nozzle. In some embodiments, the first end of the at least one stator vane is positioned closer to the longitudinal axis of the housing than the second end of the at least one stator vane. 
     According to some variants, a gap between a downstream edge of the rotor blades and an upstream edge of one or more of the stator vanes is less than one half of a diameter of the impeller. In some cases, one of the stator vanes is parallel to and positioned along the longitudinal axis of the housing. In some embodiments, the air moving device comprises an inner housing positioned at least partially within the housing, wherein the two one or more stator vanes are positioned within the inner housing. The air moving device can include a hanger capable of attaching to the air moving device. The hanger can be configured to facilitate attachment of the air moving device to a ceiling or other structure. In some embodiments, the hanger is hingedly attached to the air moving device. In some embodiments, the air moving device includes an inlet cowl comprising a curved surface configured to reduce generation of turbulence at the first end of the housing. In some cases, a length of the minor axis of the outlet of the nozzle is less than ⅓ of a length of the major axis of the outlet of the nozzle. In some embodiments, a cross-sectional area of the outlet of the nozzle is less than the cross-sectional area of the inlet of the nozzle. 
     A method of de-stratifying air within an enclosure can include positioning an air moving device above a floor of the enclosure. The air moving device can have a longitudinal axis. In some embodiments, the air moving device includes a nozzle mounted in the housing between the impeller and the second end of the housing. The nozzle can have an inlet with a circular cross-section and an outlet with an oblong cross-section. In some embodiments, the oblong cross-section has a major axis and a minor axis. The cross-section (e.g., circular cross-section) of the inlet can have a greater area than the cross-section (e.g., oblong cross-section) of the outlet. In some cases, the method includes actuating an impeller of the air moving device, the impeller having a rotational axis substantially parallel to or coincident the longitudinal axis of the air moving device. The method can include directing an oblong column of air toward the floor from the air moving device, the oblong column of air having a major axis and a minor axis, the major axis of the oblong column of air being greater than the minor axis of the oblong column of air. In some embodiments, the method includes moving the air moving device toward or away from the floor to vary a cross-sectional area of a portion of the oblong column of air which impinges upon the floor. According to some variants, the method includes changing an angle of a stator vane within the nozzle to change the length of the major axis of the oblong column of air. 
     In accordance with at least one embodiment of the present disclosure, an air moving device can include a housing. The housing can have a first end, a second end, and a longitudinal axis extending between the first end and the second end. In some cases, the device includes an impeller. The impeller can be rotatably mounted within the housing. In some embodiments, the impeller is mounted adjacent the first end of the housing. The impeller can have one or more rotor blades capable of directing a volume of air toward the second end of the housing. In some embodiments, the impeller is configured to rotate about a rotational axis. In some cases, the device includes a nozzle. The nozzle can be connected to the housing. In some cases, the nozzle is connected to the housing between the impeller and the second end of the housing. The nozzle can have an inlet and an outlet. The outlet can have an oblong cross-section. In some embodiments, the oblong cross-section has a major axis and a minor axis. The device can include one or more stator vanes. The one or more stator vanes can be positioned within the nozzle. In some embodiments, at least one of the stator vanes has a first end at or adjacent to the inlet of the nozzle and a second end at or adjacent to the outlet of the nozzle. In some embodiments, the first end of the at least one stator vane is positioned closer to the longitudinal axis of the housing than the second end of the at least one stator vane. In some embodiments, a cross-sectional shape of the inlet of the nozzle is different from the cross-section of the outlet of the nozzle. 
     In some embodiments, a gap between a downstream edge of the rotor blades and an upstream edge of one or more of the stator vanes is less than one half of a diameter of the impeller. In some cases, one of the stator vanes is parallel to and positioned along the longitudinal axis of the housing. In some embodiments, the device comprises an inner housing positioned at least partially within the housing. In some cases, the one or more stator vanes are positioned within the inner housing. In some embodiments, the air moving device includes a hanger capable of attaching to the air moving device. The hanger can be configured to facilitate attachment of the air moving device to a ceiling or other structure. In some embodiments, the hanger is hingedly attached to the air moving device. Preferably, the air moving device includes an inlet cowl comprising a curved surface configured to reduce generation of turbulence at the first end of the housing. In some embodiments, a length of the minor axis of the outlet of the nozzle is less than a length of the major axis of the outlet of the nozzle. In some cases, a cross-sectional area of the outlet of the nozzle is less than a cross-sectional area of the inlet of the nozzle. In some cases, the inlet of the nozzle has an elliptical shape. In some embodiments, the inlet of the nozzle has a circular shape. In some embodiments, the nozzle decreases in cross-sectional area from the inlet to the outlet. 
     According to at least one embodiment of the present disclosure, a method of de-stratifying air within an enclosure can include utilizing an air moving device above a floor of the enclosure. The air moving device can have a longitudinal axis. In some embodiments, the air moving device includes a nozzle. The nozzle can be mounted in the housing. In some embodiments, the nozzle is mounted in the housing between the impeller and the second end of the housing. In some cases, the nozzle has an inlet with a circular cross-section. In some embodiments, the nozzle has an outlet with an oblong cross-section. The oblong cross-section can have a major axis and a minor axis. In some embodiments, the circular cross-section of the inlet can have a greater area than the oblong cross-section of the outlet. In some cases, the method includes actuating an impeller of the air moving device. The impeller can have a rotational axis substantially parallel to the longitudinal axis of the air moving device. The method can include directing an oblong column of air toward the floor from the air moving device. The oblong column of air can have a major axis and a minor axis. The major axis of the oblong column of air can be greater than the minor axis of the oblong column of air. 
     According to some variants, the method includes changing an angle of a stator vane within the nozzle to change a length of the major axis of the oblong column of air. The method can include moving the air moving device toward or away from the floor to vary a cross-sectional area of a portion of the oblong column of air which impinges upon the floor. 
     In accordance with at least one embodiment of the present disclosure, an air moving device can include an impeller assembly. The impeller assembly can have an inlet end and an outlet end. The impeller assembly can include an impeller. The impeller can be positioned between the inlet end and the outlet end. The impeller can have a first impeller blade and a second impeller blade. In some embodiments, the impeller has an axis of rotation wherein rotation of the first and second impeller blades about the axis of rotation draws air into the inlet end of the impeller assembly and pushes air out of the outlet end of the impeller assembly. The air moving device can include a nozzle assembly. The nozzle assembly can be positioned downstream from the outlet end of the impeller assembly. In some embodiments, the nozzle assembly has a nozzle housing. The nozzle housing can have a nozzle inlet and a nozzle outlet positioned further from the impeller assembly than the nozzle inlet. The nozzle housing can define a nozzle interior between the nozzle inlet and the nozzle outlet. In some embodiments, the nozzle assembly includes a nozzle axis. The nozzle assembly can include a first stator vane. The first stator vane can be positioned at least partially within the nozzle interior. In some embodiments, the first stator vane has an upstream end and a downstream end. The nozzle assembly can include a second stator vane. The second stator vane can be positioned at least partially within the nozzle interior. In some embodiments, the second stator vane has an upstream end and a downstream end. In some cases, the upstream end of the first stator vane is bent at a first angle with respect to the nozzle axis. Preferably, the upstream end of the second stator vane is bent at a second end with respect to the nozzle axis. In some embodiments, the first angle is less than the second angle. 
     According to some variants, the nozzle outlet has an oblong cross-section as measured perpendicular to the nozzle axis. In some configurations, the air moving device includes a third stator vane. The third stator vane can be positioned at least partially within the nozzle interior. The third stator vane can have an upstream end and a downstream end. In some embodiments, the upstream end of the third stator vane is bent at a third angle with respect to the nozzle axis. Preferably, the third angle is greater than the second angle. In some cases, the downstream end of the second stator vane is parallel to the nozzle axis. In some embodiments, the air moving device includes a fourth stator vane. The fourth stator vane can be positioned at least partially within the nozzle interior. In some embodiments, the fourth stator vane has an upstream end and a downstream end, wherein the upstream end of the fourth stator vane is bent at a fourth angle with respect to the nozzle axis. Preferably, the fourth angle is equal to the first angle. In some cases, the upstream end of the fourth stator vane is bent in a direction opposite the bend of the upstream end of the first stator vane, with respect to the nozzle axis. In some embodiments, the nozzle assembly includes a cross-vane having an upstream end and a downstream end. The cross-vane can separate the nozzle interior into a first nozzle chamber and a second nozzle chamber. In some embodiments, the first stator vane is positioned within the first nozzle chamber and the fourth stator vane is positioned within the second nozzle chamber. In some embodiments, the air moving device includes an outer housing having a housing inlet, a housing outlet, and a housing interior between the housing inlet and the housing outlet. In some cases, each of the impeller assembly and the nozzle assembly are positioned at least partially within the housing interior. In some embodiments, during a single revolution of the first and second impeller blades about the axis of rotation of the impeller, the first impeller blade passes the first stator vane before passing the second stator vane. In some embodiments, during a single revolution of the first and second impeller blades about the axis of rotation of the impeller, the first impeller blade passes the first stator vane before passing the third stator vane. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       These and other features and advantages of the present embodiments will become more apparent upon reading the following detailed description and with reference to the accompanying drawings of the embodiments, in which: 
         FIG. 1  is a top perspective view of an air moving device in accordance with an embodiment. 
         FIG. 2A  is a cross-sectional view of the device of  FIG. 1 , taken along line  2 - 2  in  FIG. 1 . 
         FIG. 2B  is a top perspective cross-sectional view of the device of  FIG. 1 , taken along line  2 - 2  in  FIG. 1 . 
         FIG. 3A  is a cross-sectional view of the device of  FIG. 1 , taken along line  3 - 3  in  FIG. 1 . 
         FIG. 3B  is a top perspective cross-sectional view of the device of  FIG. 1 , taken along line  3 - 3  in  FIG. 1 . 
         FIG. 4  is a top plan view of the device of  FIG. 1 . 
         FIG. 5  is a bottom plan view of the device of  FIG. 1 . 
         FIG. 6A  is a cross-sectional view of the device of  FIG. 1 , taken along line  2 - 2  in  FIG. 1 , and a column of moving air leaving an outlet of the device. 
         FIG. 6B  is a cross-sectional view of the device of  FIG. 1 , taken along line  3 - 3  in  FIG. 1 , and a column of moving air leaving an outlet of the device. 
         FIG. 7  is a top plan view of a dispersion pattern of the column of moving air which impinges the floor of an enclosure. 
         FIG. 8  is a top plan view of an embodiment of an air moving device wherein one or more of the stator vanes has a bent upstream end. 
         FIG. 9  is a cross-sectional view of the device of  FIG. 8 , taken along the line  9 - 9  of  FIG. 8 . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     As illustrated in  FIG. 1 , an air moving device  100  can include an outer housing  110 . The outer housing  110  can have a generally cylindrical shape, though other shapes are possible. For example, the outer housing  110  can have an annularly symmetric shape with varying diameters along a length of the outer housing  110 . The air moving device  100  can have an inlet  112  and an outlet  114 . As illustrated, the air moving device  100  can have a central axis CL extending through the air moving device  100  between the inlet  112  and the outlet  114 . 
     A hanger  116  may be attached to the outer housing  110 . For example, the hanger  116  may be hingedly attached to the outer housing  110  via one or more hinge points  118 . The hanger  116  can facilitate installation of the air moving device  100  at or near a ceiling or other structure within an enclosure (e.g., a warehouse, retail store, grocery store, home, etc.). Further, the hanger  116  may advantageously space the inlet  112  from a mounting surface (e.g., a ceiling or other mounting surface). The hinged connection between the hanger  116  and the outer housing  110  can permit tilting of the air moving device  100  about the hinge points  118  before and/or after installation of the air moving device  100 . In certain embodiments, no hanger may be used. 
     As illustrated in  FIGS. 2A-3B , the air moving device  100  can include a nozzle assembly  120 . The nozzle assembly  120  can include an inner housing  122 . The inner housing  122  can be attached to the outer housing  110 . In some embodiments, the inner housing  122  is positioned entirely within the outer housing  110 . In some embodiments, a portion of the inner housing  122  extends out from the inlet  112  and/or from the outlet  114  of the outer housing  110 . In some applications, the air moving device  100  does not include an outer housing  110 . In some such cases, the hanger  116  is attached directly to the inner housing  122 . 
     The air moving device  100  can include an impeller  124 . The impeller  124  can be positioned at least partially within the inner housing  122 . As illustrated, the impeller  124  can be positioned within an impeller housing  125 . In some embodiments, the impeller housing  125  and inner housing  122  form a single and/or monolithic part. The impeller  124  can be configured to rotate one or more impeller blades  126 . The impeller blades  126  can be fixed to a hub  123   a  of the impeller  124 . In some embodiments, as illustrated in  FIG. 3A , the impeller blades  126  are fixed to the hub  123   a  of the impeller  124  and fixed to an outer impeller body portion  123   b . An axis of rotation of the impeller  124  can be substantially parallel to the central axis CL of the air moving device  100 . For example, the impeller  124  and impeller blades  126  can act as an axial compressor within the air moving device  100  when the air moving device  100  is in operation. The impeller  124  can be configured to operate at varying power levels. For example, the impeller  124  can operate between 5 and 10 watts, between 7 and 15 watts, between 12 and 25 watts, and/or between 20 and 50 watts. In some embodiments, the impeller  124  is configured to operate at a power greater than 5 watts, greater than 10 watts, greater than 15 watts, and/or greater than 25 watts. Many variations are possible. In some cases, the power usage and/or size of the impeller used is determined by the height at which the air moving device  100  is installed within an enclosure. For example, higher-powered impellers  124  can be used for air moving devices  100  installed further from the floor of an enclosure. 
     The inlet  112  can include an inlet  112  cowl. The inlet  112  cowl can be sized and shaped to reduce turbulence of flow of air entering inlet  112  of the air moving device  100 . For example, as illustrated in  FIG. 2A , the inlet cowl  128  can have a curved shape. The curved shape of the inlet cowl  128  can extend from an outer perimeter of the inlet  112  to an inlet to the impeller housing  125 . The curved shape of the inlet cowl  128  can reduce the amount of sharp corners or other turbulence-inducing features faced by air approaching the impeller  124  from the inlet  112 . 
     In some embodiments, the nozzle assembly  120  includes one or more stator vanes. For example, as illustrated, the nozzle assembly  120  can include a center vane  130 . The center vane  130  can be planar, and/or parallel to the central axis of the air moving device  100 . The center vane  130  can be positioned in a substantial center of the nozzle assembly  120  as measured on the plane of  FIG. 2A . 
     The nozzle assembly  120  can include one or more angled vanes  132   a ,  132   b . The angled vanes  132   a ,  132   b  can be planar (e.g., straight) and/or curved (e.g., S-shaped, double-angled, etc.). In some embodiments, the nozzle assembly  120  includes one angled vane on each side of the center vane  130 . In some embodiments, more than one angled vane is positioned on each side of the center vane  130 . Many variations are possible. The angle θ of the angled vanes  132   a ,  132   b  with respect to the central axis CL of the air moving device  100  can be greater than or equal to 5°, greater than or equal to 10°, greater than or equal to 15°, greater than or equal to 25°, and/or greater than or equal to 45°. In some cases, the angle θ of the angled vanes  132   a ,  132   b  with respect to the central axis CL of the air moving device  100  is between 5° and 65°. Many variations are possible. In some embodiments, the nozzle assembly  120  has an even number of stator vanes. In some cases, the nozzle assembly  120  does not include a center vane  130  and only includes one or more angled vanes. The air moving device  100  can be constructed such that the nozzle assembly  120  is modular with respect to one or more of the other components of the air moving device  100 . For example, in some embodiments, a nozzle assembly  120  can be removed from the air moving device  100  and replaced with another nozzle assembly  120  (e.g., a nozzle assembly having a larger outlet, a smaller outlet, more or fewer stator vanes, greater or lesser vane angles, etc.). In some cases, the inner housing  122  of the nozzle assembly  120  is constructed in two halves, each half connected to the other half via one or more fasteners  127  or other fastening devices. In some such cases, the two halves of the inner housing  122  can be separated to permit replacement of one or more of the stator vanes  130 ,  132   a ,  132   b.    
     Referencing  FIGS. 3A-3B , the nozzle assembly  120  can include one or more cross-vanes  136 . The one or more cross-vanes  136  can be planar and/or curved. The one or more cross-vanes may be positioned within the nozzle assembly  120  perpendicular to one or more of the vanes  130 ,  132   a ,  132   b . For example, the nozzle assembly  120  can include a single cross-vane  136  that is substantially perpendicular to the center vane  130 . The cross-vane  136  can be positioned in a substantial center of the nozzle assembly  120  as measured on the plane of  FIG. 3A . 
     As illustrated in  FIG. 4 , the inlet  112  of the air moving device  100  can have a substantially circular cross-section. In some case, an upstream end or inlet (e.g., the upper end with respect to  FIG. 2A ) of the nozzle assembly  120  has a substantially circular cross-section. In some embodiments, as illustrated in  FIG. 5 , the outlet  114  of the air moving device  100  (e.g., the outlet of the nozzle assembly  120 ) has a substantially rectangular, oval-shaped, and/or oblong cross-section. For example, the outlet of the nozzle assembly  120  can have a pair of long sides  115   a ,  115   b  and a pair of short sides  117   a ,  117   b . Each of the long sides  115   a ,  115   b  can be substantially identical in length. In some embodiments, each of the short sides  117   a ,  117   b  are substantially identical in length. The length of the short sides  117   a ,  117   b  can be substantially equal to a length of a minor axis of the oblong shape of the outlet of the nozzle assembly  120 . In some embodiments, the length of the long sides  115   a ,  115   b  of the outlet of the nozzle assembly  120  is substantially equal to a length of a major axis of the oblong shape of the outlet of the nozzle assembly  120 . The length of the short sides  117   a ,  117   b  can be less than or equal to ⅛, less than or equal to ⅙, less than or equal to ¼, less than or equal to ⅓, less than or equal to ½, less than or equal to ⅝, less than or equal to ¾, and/or less than or equal to 9/10 of the length of the long sides  115   a ,  115   b . In some cases, the length of the short sides  117   a ,  117   b  is between ⅛ and ½, between ⅓ and ¾, and/or between ⅜ and 9/10 of the length of the long sides  115   a ,  115   b . Many variations are possible. In some embodiments, the outlet of the nozzle assembly can be elliptical or rectangular in shape. 
     The cross-sectional area of the outlet of the nozzle assembly  120  is less than or equal to 95%, less than or equal to 90%, less than or equal to 85%, less than or equal to 75% and/or less than or equal to 50% of the cross-sectional area of the inlet of the nozzle assembly  120 . In some embodiments, the cross-sectional area of the outlet of the nozzle assembly  120  is between 75% and 95%, between 55% and 85%, between 70% and 90%, and/or between 30% and 60% of the cross-sectional area of the inlet of the nozzle assembly  120 . Many variations are possible. 
     As illustrated in  FIGS. 2B and 5 , the hanger  116  can be connected to the outer housing  110  at hinge points  118  having an axis of rotation generally perpendicular to the center vane  130  (e.g., generally parallel to the major axis of the outlet to the nozzle assembly  120 ). In some such arrangements, the air moving device  100  can be mounted offset from a centerline of an aisle and rotated about the hinge points  118  to direct air toward the center of the floor of the aisle. For example, the air moving device  100  can be installed adjacent to a light fixture, where the light fixture is positioned over a centerline of the aisle. 
     In some embodiments, the nozzle assembly  120  can be rotatable within the outer housing  110 . For example, the nozzle assembly  120  can be rotated about the axis of rotation of the impeller  124  with respect to the hanger  116 . In some such embodiments, the nozzle assembly  120  can be releasable or fixedly attached to the outer housing  110  in a plurality of rotational orientations. For example, the inner housing  122  and/or nozzle assembly  120  can be installed in the outer housing  110  such that the axis of rotation of the hanger  116  is generally perpendicular to the major axis of the outlet of the nozzle assembly  120 . 
     In some embodiments, the air moving device  100  includes one or more bezels  138 . The bezels  138  can be positioned between the inner housing  122  and the outer housing  110  at the outlet  114  of the air moving device  100 . For example, the bezels  138  can be positioned between the oblong wall of the outlet  114  of the air moving device  100  and the substantially circular wall of the outer housing  110  adjacent the outlet  114 . The bezels  138  can provide structural stability at the outlet end  114  of the air moving device  100 . For example, the bezels  138  can reduce or eliminate later motion (e.g., motion transverse to the central axis CL of the air moving device  100 ) between the outlet of the nozzle assembly  120  and the outlet end of the outer housing  110 . The bezels  138  can be configured to be interchangeable. For example, the bezels  138  can be replaced with bezels of varying sizes and shapes to correspond with nozzle outlets of various sizes and shapes. In some cases, interchangeable bezels can be mounted adjacent the nozzle inlet to correspond to nozzle inlets having various sizes and shapes. 
     As illustrated in  FIG. 2A , a gap  134  between the impeller blades  126  and one or more of the vanes can be small. For example, a height HG (measured parallel to the axis of rotation of the impeller  124 ) of the gap  134  between the downstream edge of the impeller blades  126  and an upstream edge of one or more of the stator vanes can be proportional to the diameter of the impeller  124  (e.g., diameter to the tip of the impeller blades  126 ). Preferably, the height HG of the gap  134  is less than or equal to one half the diameter of the impeller  124 . 
     Referring to  FIGS. 6A and 6B , the air moving device  100  can be configured to output a column of air  140 . The column of moving air  140  can extend out from the outlet  114  of the air moving device  100 . In some embodiments, the column of moving air  140  flairs outward in a first direction while maintaining a substantially constant width in a second direction. For example, the column of moving air  140  may flair outward from the central axis CL of the air moving device in a plane parallel to the plane of the cross-vane  136  (e.g., the plane of  FIG. 6A ). The column of moving air  140  can flair out at an angle β with respect to the central axis CL of the air moving device  100 . Angle β can be greater than or equal to 3°, greater than or equal to 7°, greater than or equal to 15°, greater than or equal to 25°, and/or greater than or equal to 45°. In some embodiments, angle β is between 2° and 15°, between 8° and 25°, between 20° and 45°, and/or between 30° and 60°. Many variations are possible. The angle β of the column of moving air  140  can be proportional to the angle θ of the angled vanes  132   a ,  132   b . For example, increasing the angle θ of the angled vanes  132   a ,  132   b  can increase the angle β of the column of moving air  140  (e.g., to widen the column of moving air  140 ). In some cases, reducing the angle θ of the angled vanes  132   a ,  132   b  can reduce the angle β of the column of moving air  140 . As illustrated in  FIG. 6B , the column of moving air  140  may have a generally columnar (e.g., vertical or non-flaring) pattern in a plane perpendicular to the plane of the cross-vane  136  (e.g., the plane of  FIG. 6B ). 
     In some embodiments, the dispersion pattern  142  of the air column  140  which impinges the floor  144  of the enclosure in which the air moving device  100  is installed has a width W and a length L. The length L can be greater than the diameter D or cross-sectional width of the air moving device  100 , as illustrated in  FIG. 6A . For example, the length L of the dispersion pattern  142  can be greater than or equal to 1.1 times, greater than or equal to 1.3 times, greater than or equal to 1.5 times, greater than or equal to 1.7 times, greater than or equal to 2 times, greater than or equal to 2.3 times, greater than or equal to 2.7 times, and/or greater than or equal to 4 times the diameter D of the air moving device  100 . In some cases, the length L of the dispersion pattern  142  is between 1 and 1.8 times greater, between 1.7 and 2.9 times greater, and/or between 2.7 and 5 times greater than the diameter D of the air moving device  100 . 
     In some embodiments, the width W is less than or equal to the diameter of the air moving device  100 , as illustrated in  FIG. 6B . For example the width W of the dispersion pattern  142  can be between ¼ and ¾, between ½ and ⅞, and/or between ¾ and 9/10 of the diameter D of the air moving device  100 . In some cases, the width W of the dispersion pattern  142  is greater than the diameter D of the air moving device  100  (e.g., when the column of moving air  140  expands at a distance from the outlet  114  of the air moving device  100 ). For example, the width W of the dispersion pattern can be between 1 and 1.4 times, between 1.3 and 1.8 times, and/or between 1.5 and 2.5 times the diameter D of the air moving device  100 . The width W can be sized and shaped to fit between two or more storage units  144  (e.g., within an aisle) in a grocery store or other retail setting. In some cases, the width W is less than ⅛, less than ¼, less than ⅓, less than ½, less than ⅔, less than ¾, and/or less than 9/10 of the length L of the dispersion pattern  142 . The width W can be between 1/10 and ¼, between ⅛ and ⅓, between ½ and ¾, and/or between ⅝ and 9/10 of the length of the dispersion pattern  142 . Many variations are possible. Each of the above ratios between the width W of the dispersion pattern  142 , the length L of the dispersion pattern  142 , and the diameter D of the air moving device  100  can be attained when the air moving device  100  is mounted at a given height H from the floor  144 . For example, the height H can be between 8 feet and 12 feet, between 10 feet and 15 feet, between 14 feet and 20 feet, and/or between 18 feet and 40 feet. At a given height, the angles θ of the angled vanes  132   a ,  132   b  can be modified to modify the ratio between the width W of the dispersion pattern  142 , the length L of the dispersion pattern  142 , and the diameter D of the air moving device  100 . 
     A user of the air moving device  100  can vary the first width W 1  of the dispersion pattern  142 . For example, the user can increase the height H at which the air moving device  100  is installed within the enclosure. Increasing the height H can increase the distance over which the column of moving air  140  flairs outward, increasing the width W 1 . Conversely, decreasing the height H can decrease the width W 1  of the dispersion pattern  142 . 
       FIGS. 8 and 9  illustrate an embodiment of an air moving device  1100 . Numerical reference to components is the same as previously described, except that the number “1” has been added to the beginning of each reference. Where such references occur, it is to be understood that the components are the same or substantially similar previously-described components unless otherwise indicated. For example, in some embodiments, the impeller  1124  of the air moving device  1100  can be the same or substantially similar in structure and/or function to the impeller  124  of the air moving device  100  described above. The air moving device  1100  can include a hanger (not shown) having the same or a similar structure to the hanger  116  described above. 
     As illustrated in  FIGS. 8 and 9  the air moving device  1100  can include a plurality of stator blades  1132   a ,  1132   b ,  1132   c ,  1132   d ,  1132   e , and/or  1132   f  (hereinafter, collectively referred to as stator blades  1132 ). Each of the stator blades  1132  can include an upstream end  1133  and a downstream end  1135  (hereinafter, specific upstream and downstream ends of specific stator blades are identified by like letters, e.g., upstream and downstream ends  1133   a ,  1135   a  of stator blade  1132   a ). In some cases, the upstream end(s) of one or more of the stator blades  1132  is curved away from or bent at an angle with respect to the axis of rotation of the impeller  1124 . In some embodiments, the axis of rotation of the impeller  1124  is parallel to and/or collinear with the central axis CL (e.g., nozzle axis) of the air moving device  1100 . The upstream end(s) of one or more of the stator blades  1132  can be curved away from or bent to reduce the angle of attack on the upstream end of the stator blade of the air exiting the impeller  1124 . Reducing the angle of attack on the upstream end of the stator blade of the air exiting the impeller  1124  can reduce turbulent flow within the device  1100 . Reducing turbulent flow in the device  1100  can reduce noise and/or increase efficiency (e.g., exit flow rate compared to electricity used) of the device  1100 . 
     In some embodiments, the bent upstream portions of the stator blades  1132  are curved away from or bent in directions parallel to the cross-vane  1136  of the nozzle assembly  1120 . For example, the cross-vane  1136  can separate the interior of the nozzle assembly  1120  (e.g., the interior of the inner housing  1122 ) into two separate chambers  1137   a ,  1137   b . In some cases, multiple cross-vanes separate the interior of the nozzle assembly into three or more separate chambers. As illustrated, the first, second, and third stator vanes  1132   a - c  are positioned in one chamber (e.g., first chamber  1137   a ) of the interior of the nozzle and the fourth, fifth, and sixth stator vanes  1132   d - f  are positioned in another chamber (e.g., second chamber  1137   b ) of the interior of the nozzle. The stator vanes positioned on one side of cross-vane  1136  (e.g., in a first chamber of the nozzle interior) are curved or bent in a direction opposite the direction in which the stator vanes positioned on the opposite side of the cross-vane  1136  (e.g., in a second chamber of the nozzle interior) are curved or bent. 
     As illustrated, the impeller  1124  of the air moving device  1100  is configured to rotate in the clockwise direction (e.g., in the frame of reference of the plane of  FIG. 8 ) about the axis of rotation of the impeller  1124  when moving air into the inlet  1112  and out through the outlet  1114  of the device  1100 . The cross-vane lateral component of the air exiting the impeller  1124  can be defined as the velocity component parallel to the cross-vane  1136  and perpendicular to the axis of rotation of the impeller  1124 . The cross-vane lateral component of the air exiting a given rotor blade  1126  can changer as the blade  1126  rotates about the axis of rotation of the impeller  1124 . For example, the cross-vane lateral component of the air exiting a given rotor blade can be close to zero as the rotor blade passes the cross-vane  1136 . The cross-vane lateral component of the air exiting the given rotor blade will increase as the rotor blade continues to move about the axis of rotation of the impeller  1124 , before diminishing as the impeller blade approaches the cross-vane  1136  on an opposite side of the device  1100  from the point at which the impeller blade had previously crossed the cross-vane  1136 . 
     As illustrated in  FIG. 9 , one or more of the stator vanes  1132  can be curved or bent at their respective first ends  1133  to an inlet angle. For example, the inlet end  1133   a  of the first stator vane  1132   a  can be curved or bent to a first inlet angle IA 1 . The inlet end  1133   b  of the second stator vane  1132   b  can be curved or bent to a second inlet angle IA 2 . The inlet end  1133   c  of the third stator vane  1132   c  can be curved or bent to a third inlet angle IA 3 . As illustrated, in some cases, the first inlet angle IA 1  is less than the second inlet angle IA 2 . In some cases, the first inlet angle IA 1  is less than the third inlet angle IA 3 . In some cases, the second inlet angle IA 2  is less than the third angle IA 3 . 
     In some embodiments, the downstream end  1135  of one or more of the stator vanes  1132  is angled with respect to (e.g., bent and/or curved away from) the axis of rotation of the impeller  1124  by an outlet angle. For example, the downstream end  1135   a  of the first stator vane  1132   a  can be angled with respect to the axis of rotation of the impeller  1124  by an outlet angle OA 1 . The outlet end  1135   b  of the second stator vane  1132   b  can be angled with respect to the axis of rotation of the impeller  1124  by an outlet angle OA 2 . The outlet end  1135   c  of the third stator vane  1132   c  can be angled with respect to the axis of rotation of the impeller  1124  by an outlet angle OA 3 . One or more of the outlet angles (e.g., the outlet angle OA 2  of the second stator vane  1132   b ) can be zero. In some cases, the outlet angles OA 1 , OA 3  of the first and third stator vanes  1132   a ,  1132   c  are opposite each other such that the outlet ends  1135   a ,  1135   c  of the first and third stator vanes  1132   a ,  1132   c  flare outward or taper inward with respect to the axis of rotation of the impeller  1124 . One or both of the outlet angles OA 1 , OA 3  of the first and third stator vanes  1132   a ,  1132   c  can be similar to or equal to the angle θ of the angled vanes  132   a ,  132   b  with respect to the axis of rotation of the impeller  1124 . 
     The stator vanes positioned within the second chamber  1137   b  of the interior of the nozzle assembly  1120  can have the same or similar construction and features of the stator vanes positioned within the first chamber  1137   a , wherein the vanes in the second chamber  1137   b  are mirrored about the centerline CL of the device  1100  with respect to the vanes in the first chamber  1137   a . For example, the fourth stator vane  1132   d  can have the same or a similar overall shape and position in the second chamber  1137   b  as the first stator vane  1132   a  has in the first chamber  1137   a . The same can be true when comparing the fifth stator vane  1132   e  to the second stator vane  1132   b , and/or when comparing the sixth stator vane  1132   f  to the third stator vane  1132   c . In some embodiments, the angles of attack on the upstream ends of the stator vanes  1132   d - f  of the air exiting a given impeller blade as it passes the stator vanes  1132   d - f  are the same as or similar to the angles of attack on the upstream ends of the stator vanes  1132   a - c , respectively, of the air exiting the impeller blade as it passes the stator vanes  1132   d - f.    
     The terms “approximately”, “about”, “generally” and “substantially” as used herein represent an amount close to the stated amount that still performs a desired function or achieves a desired result. For example, the terms “approximately”, “about”, “generally,” and “substantially” may refer to an amount that is within less than 10% of the stated amount. 
     Although these inventions have been disclosed in the context of certain preferred embodiments and examples, it will be understood by those skilled in the art that the present inventions extend beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the inventions and obvious modifications and equivalents thereof. In addition, while several variations of the inventions have been shown and described in detail, other modifications, which are within the scope of these inventions, will be readily apparent to those of skill in the art based upon this disclosure. It is also contemplated that various combinations or sub-combinations of the specific features and aspects of the embodiments can be made and still fall within the scope of the inventions. It should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the disclosed inventions. Thus, it is intended that the scope of at least some of the present inventions herein disclosed should not be limited by the particular disclosed embodiments described above.