Heat exchanger

Abstract

A heat exchanger including: a collecting pipe that has a collecting pipe wall; and a plurality of flat pipes. The plurality of flat pipes include two groups of first flat pipes, which are positioned on the outermost side in an axial direction of the collecting pipe, and a second flat pipe, which is positioned between the two groups of first flat pipes; and the collecting pipe includes two first parts, which correspond to the two groups of first flat pipes in the axial direction of the collecting pipe, and a second part, which is positioned between the two first parts. The tensile strength of at least one group of first flat pipes from the two groups of first flat pipes in the axial direction of the collecting pipe is greater than the tensile strength of the second flat pipe in the axial direction of the collecting pipe and/or the tensile strength of at least one first part from the two first parts of the collecting pipe in the axial direction of the collecting pipe is greater than the tensile strength of the second part of the collecting pipe in the axial direction of the collecting pipe. By means of the heat exchanger in the present invention, the bursting strength of the heat exchanger can be improved.

1 . A heat exchanger, comprising:
 a header, comprising a header wall having multiple through-holes; and   multiple flat tubes, the multiple flat tubes being arranged in an axial direction of the header, and ends of the multiple flat tubes being respectively inserted into multiple through-holes of the header wall of the header and connected to the header wall,   wherein the multiple flat tubes comprise two sets of first flat tubes that are outermost in the axial direction of the header, and a second flat tube between the two sets of first flat tubes; the header comprises two first parts corresponding to outermost flat tubes in the axial direction of the header, and a second part between the two first parts, and   wherein the tensile strength of at least one set of first flat tubes in the two sets of first flat tubes in the axial direction of the header is greater than the tensile strength of the second flat tube in the axial direction of the header, and/or the tensile strength of at least one first part of the two first parts of the header in the axial direction of the header is greater than the tensile strength of the second part of the header in the axial direction of the header.   
     
     
         2 . The heat exchanger as claimed in  claim 1 , wherein:
 the flat tube comprises multiple channels, and a spacing wall between adjacent channels; a dimension, in the direction of arrangement of the spacing wall, of at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is greater than a dimension, in the direction of arrangement of the spacing wall, of the spacing wall of the second flat tube.   
     
     
         3 . The heat exchanger as claimed in  claim 2 , wherein:
 the at least one spacing wall of at least one first flat tube in the at least one set of first flat tubes is a spacing wall located in the middle in a width direction of the first flat tube.   
     
     
         4 . The heat exchanger as claimed in  claim 2 , wherein:
 the dimensions, in the direction of arrangement of the spacing walls, of multiple spacing walls of at least one first flat tube in the at least one set of first flat tubes are the same.   
     
     
         5 . The heat exchanger as claimed in  claim 1 , wherein:
 at least one first flat tube in the at least one set of first flat tubes is a solid flat tube.   
     
     
         6 . The heat exchanger as claimed in  claim 1 , wherein:
 at least one first flat tube in the at least one set of first flat tubes comprises multiple secondary flat tubes, the multiple secondary flat tubes being spaced apart in a width direction of the flat tube; and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises multiple secondary through-holes, the multiple secondary through-holes being spaced apart in a circumferential direction of the header, and ends of the multiple secondary flat tubes being respectively inserted into the multiple secondary through-holes and connected to the header wall.   
     
     
         7 . The heat exchanger as claimed in  claim 6 , wherein:
 adjacent secondary flat tubes in the multiple secondary flat tubes of at least one first flat tube in the at least one set of first flat tubes are connected via a connecting part, the multiple secondary flat tubes being formed integrally with the connecting part.   
     
     
         8 . The heat exchanger as claimed in  claim 6 , wherein:
 at least one first flat tube in the at least one set of first flat tubes comprises two secondary flat tubes, and the through-hole in the header wall of the header corresponding to the at least one first flat tube comprises two secondary through-holes.   
     
     
         9 . The heat exchanger as claimed in  claim 1 , wherein:
 a dimension, in a circumferential direction of the header, of the through-hole in the header wall of the header corresponding to at least one first flat tube in the at least one set of first flat tubes is less than a dimension, in the circumferential direction of the header, of the through-hole in the header wall of the header corresponding to the second flat tube.   
     
     
         10 . The heat exchanger as claimed in  claim 9 , wherein:
 when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is inclined relative to the axial direction of the header.   
     
     
         11 . The heat exchanger as claimed in  claim 9 , wherein:
 when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes has a curved shape.   
     
     
         12 . The heat exchanger as claimed in  claim 9 , wherein:
 when viewed in an axial direction of the flat tube, the through-hole in the header wall of the header corresponding to the at least one first flat tube in the at least one set of first flat tubes is parallel to the through-hole in the header wall of the header corresponding to the second flat tube.   
     
     
         13 . The heat exchanger as claimed in  claim 1 , wherein:
 each set of first flat tubes in the two sets of first flat tubes comprises one or more first flat tubes.