Louvered fin

Abstract

The present disclosure provides a louvered fin including a leading edge, a trailing edge, and a surface extending between the leading edge and the trailing edge. The surface defines a first set of holes along a first axis, a second set of holes along a second axis and offset from the first set of holes, and a third set of holes along a third axis and offset from the second set of holes. Each of the first axis, the second axis, and the third axis extends substantially parallel to a longitudinal axis of the fin. A first offset distance between the second and first set of holes is greater than a second offset distance between the third and second set of holes. The second and the third set of holes define a substantially obtuse trapezoidal matrix.

What is claimed is: 
     
         1 . A fin comprising:
 a first edge;   a second edge opposite the first edge;   a surface extending between the first edge and the second edge;
 a first set of openings disposed on the surface and arranged along a first longitudinal axis, the first set of openings including a first opening and a second opening; 
 a second set of openings disposed on the surface and arranged along a second longitudinal axis, wherein the second longitudinal axis is parallel to the first longitudinal axis and separated by a distance from the first longitudinal axis, the second set of openings including at least a third opening, wherein: 
 a first center of the first opening is located at a first distance from a second center of the second opening; and 
 a third center of the third opening is located at a midpoint of the first distance. 
   
     
     
         2 . The fin of  claim 1 , further comprising:
 a third set of openings disposed on the surface and arranged along a third longitudinal axis, wherein the third longitudinal axis is parallel to the first longitudinal axis and the second longitudinal axis and wherein a fourth opening of the third set of openings is offset from the third opening by a second distance in a direction along a length of the fin.   
     
     
         3 . The fin of  claim 2 , wherein the first longitudinal axis is proximal to the first edge, the third longitudinal axis is proximal to the second edge, and the second longitudinal axis is disposed between the first longitudinal axis and the second longitudinal axis. 
     
     
         4 . The fin of  claim 2 , wherein the second distance is smaller than the first distance. 
     
     
         5 . The fin of  claim 1 , wherein the first edge or the second edge is a rippled edge. 
     
     
         6 . The fin of  claim 1 , further comprising a plurality of airflow structures arranged on the surface, wherein a first number of the plurality of airflow structures extend at an angle with respect to the surface. 
     
     
         7 . The fin of  claim 6 , wherein the angle is an acute angle. 
     
     
         8 . The fin of  claim 1 , further comprising:
 a plurality of airflow structures arranged on the surface, wherein the plurality of airflow structures include full length airflow structures and half-length airflow structures and wherein one or more of the half-length airflow structures are disposed proximate to the first edge or the second edge.   
     
     
         9 . The fin of  claim 1 , further comprising at least four full-length airflow structures and at least two half-length airflow structures disposed on the surface. 
     
     
         10 . An evaporator coil comprising:
 a plurality of fins, wherein a first fin of the plurality of fins comprises:
 a first set of openings arranged along a first longitudinal axis of the first fin; and 
   a second set of openings arranged along a second longitudinal axis of the first fin, the second longitudinal axis is separated from the first longitudinal axis by a first distance;   wherein:   the first set of openings include a first opening and a second opening;   the second set of openings include a third opening;   a first center point of the first opening is separated from a second center point of the second opening by a first distance; and   a third center point of the third opening is located at a midpoint of the first distance.   
     
     
         11 . The evaporator coil of  claim 10 , wherein the first fin further comprises a third set of openings arranged along a third longitudinal axis of the first fin, wherein two adjacent openings of the third set of openings are separated by a second distance, wherein the second distance is same as the first distance. 
     
     
         12 . The evaporator coil of  claim 11 , wherein:
 the first opening is offset from the third opening by a third distance in a direction along a length of the first fin; and   a fourth opening of the third set of openings is offset from the third opening by a fourth distance in the direction along the length of the first fin, wherein the fourth distance is smaller than the third distance.   
     
     
         13 . The evaporator coil of  claim 10 , wherein the first fin includes a plurality of airflow structures associated with the first opening and wherein the plurality of airflow structures include four full-length airflow structures and at least one half-length airflow structure. 
     
     
         14 . The evaporator coil of  claim 10 , wherein the first fin further comprises:
 a first edge and an opposing second edge; and   a surface extending between the first edge and the second edge, wherein the first set of openings and the second set of openings are disposed on the surface.   
     
     
         15 . The evaporator coil of  claim 14 , wherein the first edge or the second edge is a rippled edge. 
     
     
         16 . The evaporator coil of  claim 10 , wherein the first fin includes a cropped corner and a gagged portion proximal to the cropped corner. 
     
     
         17 . The evaporator coil of  claim 16 , wherein the gagged portion is around a periphery of the first opening or the second opening. 
     
     
         18 . The evaporator coil of  claim 16 , wherein the first fin includes a plurality of airflow structures and wherein the gagged portion is devoid of any airflow structures. 
     
     
         19 . The evaporator coil of  claim 10 , wherein the plurality of fins are stacked in an inclined manner with respect to each other. 
     
     
         20 . The evaporator coil of  claim 10 , wherein the first fin includes a plurality of airflow structures and wherein the plurality of airflow structures extend at an acute angle with respect to a surface of the first fin. 
     
     
         21 . A fin comprising:
 a first opening and a second opening disposed along a first longitudinal axis of the fin;   a third opening disposed along a second longitudinal axis of the fin, the second longitudinal axis being separated from the first longitudinal axis by a distance;   wherein:   a first center of the first opening and a second center of the seconding opening are separated by a first distance;   a third center of the third opening is offset from the first center by a second distance along the second longitudinal axis; and
 the second distance is half of the first distance.