Heat exchanger

Abstract

A heat exchanger includes a plurality of fins, and a plurality of flat tubes to perform heat exchange of air passing in a first direction between the tubes and fins. Each fin includes a plurality of through hole portions through which the flat tubes pass, a connecting portion that extends in a second direction intersecting the first direction without being passed through by the tubes, and at least one fin pitch defining portion in contact with an adjacent fin. In each fin, one fin pitch defining portion is provided for every N flat tubes. N is an integer of at least two. The fin pitch defining portion of each fin includes at least two raised portions formed by cutting and raising, in at least two directions, a heat transfer portion of each fin. The heat transfer portion is located at a position other than the connecting portion.

1 . A heat exchanger comprising:
 a plurality of fins; and   a plurality of flat tubes, the heat exchanger being configured to perform heat exchange of air passing in a first direction between the plurality of flat tubes and the plurality of fins,   each of the fins including
 a plurality of through hole portions through which the plurality of flat tubes pass, 
 a connecting portion that extends in a second direction intersecting the first direction without being passed through by the plurality of flat tubes, and 
 at least one fin pitch defining portion in contact with an adjacent fin and defining a fin pitch, 
   in each of the fins, one fin pitch defining portion being provided for every N flat tubes, where N is an integer of at least two, and   the fin pitch defining portion of each of the fins including at least two raised portions formed by cutting and raising, in at least two directions, a heat transfer portion of each of the fins, the heat transfer portion being located at a position other than the connecting portion.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein
 the fin pitch defining portion of each of the fins includes three raised portions formed by cutting and raising, in three directions, the heat transfer portion of each of the fins, the heat transfer portion being located at the position other than the connecting portion.   
     
     
         3 . The heat exchanger according to  claim 1 , wherein
 the fin pitch defining portion of each of the fins includes four raised portions formed by cutting and raising, in four directions, the heat transfer portion of each of the fins, the heat transfer portion being located at the position other than the connecting portion.   
     
     
         4 . The heat exchanger according to  claim 1 , wherein
 the number of flat tubes is at least four, and   one fin pitch defining portion is provided for every four flat tubes.   
     
     
         5 . The heat exchanger according to  claim 1 , wherein
 the number of flat tubes is at least six, and   one fin pitch defining portion is provided for every six flat tubes.   
     
     
         6 . The heat exchanger according to  claim 1 , wherein
 a number of fin pitch defining portions in each of the fins is at least three, and   the at least three fin pitch defining portions of each of the fins are arranged such that a number of flat tubes between adjacent fin pitch defining portions is identical.   
     
     
         7 . The heat exchanger according to  claim 1 , wherein
 each of the through hole portions of each of the fins includes
 a first upright portion that rises along a corresponding flat tube and is in contact with an adjacent fin, and 
 a second upright portion that rises along the corresponding flat tube and is not in contact with the adjacent fin. 
   
     
     
         8 . The heat exchanger according to  claim 1 , wherein
 air passing in the first direction is indoor air that undergoes heat exchange in an indoor unit that performs indoor air conditioning.   
     
     
         9 . The heat exchanger according to  claim 2 , wherein
 the number of flat tubes is at least four, and   one fin pitch defining portion is provided for every four flat tubes.   
     
     
         10 . The heat exchanger according to  claim 2 , wherein
 the number of flat tubes is at least six, and   one fin pitch defining portion is provided for every six flat tubes.   
     
     
         11 . The heat exchanger according to  claim 2 , wherein
 a number of fin pitch defining portions in each of the fins is at least three, and   the at least three fin pitch defining portions of each of the fins are arranged such that a number of flat tubes between adjacent fin pitch defining portions is identical.   
     
     
         12 . The heat exchanger according to  claim 2 , wherein
 each of the through hole portions of each of the fins includes
 a first upright portion that rises along a corresponding flat tube and is in contact with an adjacent fin, and 
 a second upright portion that rises along the corresponding flat tube and is not in contact with the adjacent fin. 
   
     
     
         13 . The heat exchanger according to  claim 3 , wherein
 the number of flat tubes is at least four, and   one fin pitch defining portion is provided for every four flat tubes.   
     
     
         14 . The heat exchanger according to  claim 3 , wherein
 the number of flat tubes is at least six, and   one fin pitch defining portion is provided for every six flat tubes.   
     
     
         15 . The heat exchanger according to  claim 3 , wherein
 a number of fin pitch defining portions in each of the fins is at least three, and   the at least three fin pitch defining portions of each of the fins are arranged such that a number of flat tubes between adjacent fin pitch defining portions is identical.   
     
     
         16 . The heat exchanger according to  claim 3 , wherein
 each of the through hole portions of each of the fins includes
 a first upright portion that rises along a corresponding flat tube and is in contact with an adjacent fin, and 
 a second upright portion that rises along the corresponding flat tube and is not in contact with the adjacent fin. 
   
     
     
         17 . A heat exchanger comprising:
 a plurality of flat tubes; and   a plurality of fins,   each of the fins including a plurality of through hole portions through which the plurality of flat tubes pass, and   each of the through hole portions including a first upright portion that rises along a corresponding flat tube and is in contact with an adjacent fin.   
     
     
         18 . The heat exchanger according to  claim 17 , wherein
 the first upright portion is provided only on one of two side surfaces of each of the flat tubes in a longitudinal direction of each of the fins.   
     
     
         19 . The heat exchanger according to  claim 18 , wherein
 each of the through hole portions includes, as a portion other than the first upright portion, a second upright portion that rises along the corresponding flat tube and is not in contact with the adjacent fin, and   the first upright portion rises higher than the second upright portion.   
     
     
         20 . The heat exchanger according to  claim 17 , wherein
 each of the through hole portions includes, as a portion other than the first upright portion, a second upright portion that rises along the corresponding flat tube and is not in contact with the adjacent fin, and   the first upright portion rises higher than the second upright portion.