Heat exchanger and air conditioning system

Abstract

A heat exchanger and an air conditioning system including the heat exchanger. The heat exchanger includes heat exchange tubes and fins, with the fin including a fin body and heat exchange tube grooves formed in the fin body, into which at least one heat exchange tube is inserted. The heat exchange tube groove includes an open first groove end, a second groove end and two groove walls. At least one of the groove walls includes a plurality of heat exchange tube guiding segments, which include first and second heat exchange tube guiding segments arranged in sequence from the first groove end to the second groove end. A line connecting between two endpoints of the first heat exchange tube guiding segment is inclined at a first angle relative to a reference plane defined by the first and second directions, and a line connecting between two endpoints of the second heat exchange tube guiding segment is inclined at a second angle relative to the reference plane when viewed in a direction perpendicular to the fin body, and the second angle is greater than the first angle and less than 90 degrees. Therefore, a performance of the heat exchanger and air conditioning system may be improved.

What is claimed is: 
     
         1 . A heat exchanger comprising:
 a plurality of heat exchange tubes arranged in a first direction; and   a plurality of fins arranged in a second direction perpendicular to the first direction, each of which comprises a fin body and a plurality of heat exchange tube grooves formed in the fin body, with at least one of the plurality of heat exchange tubes being inserted into each of at least some of the plurality of heat exchange tube grooves,   wherein the heat exchange tube groove comprises:   an open first groove end and a second groove end opposite to the first groove end; and   two opposite groove walls, and at least one of the two groove walls of at least one of the plurality of heat exchange tube grooves of at least one of the plurality of fins comprises a plurality of heat exchange tube guiding segments comprising:
 a first heat exchange tube guiding segment and a second heat exchange tube guiding segment arranged in sequence from the first groove end to the second groove end, wherein, a line connecting between two endpoints of the first heat exchange tube guiding segment is inclined at a first angle relative to a reference plane defined by the first and second directions, and a line connecting between two endpoints of the second heat exchange tube guiding segment is inclined at a second angle relative to the reference plane when viewed in a direction perpendicular to the fin body, and the second angle is greater than the first angle and less than 90 degrees. 
   
     
     
         2 . The heat exchanger according to  claim 1 , wherein
 the plurality of heat exchange tube guiding segments further comprise a third heat exchange tube guiding segment between the second heat exchange tube guiding segment and the second groove end, a line connecting between two endpoints of the third heat exchange tube guiding segment is inclined at a third angle relative to the reference plane when viewed in the direction perpendicular to the fin body, and the third angle is greater than the second angle and less than 90 degrees.   
     
     
         3 . The heat exchanger according to  claim 1 , wherein
 the plurality of heat exchange tubes comprise a plurality of rows of heat exchange tubes arranged in the first direction, each row of heat exchange tubes consisting of one heat exchange tube or a plurality of heat exchange tubes;   the one heat exchange tube or the plurality of heat exchange tubes of each of the plurality of rows of heat exchange tubes are inserted into one of the plurality of heat exchange tube grooves; and   the length of at least one of the plurality of heat exchange tube grooves of at least one of the plurality of fins in a third direction perpendicular to the first and second directions is greater than a heat exchange tube size of a row of heat exchange tubes inserted therein in the third direction, in the case where the row of heat exchange tubes is consisted of one heat exchange tube, the heat exchange tube size is the size of that one heat exchange tube in the third direction, while in the case where the row of heat exchange tubes is consisted of a plurality of heat exchange tubes, the heat exchange tube size is a sum of the sizes of the plurality of heat exchange tubes in the third direction.   
     
     
         4 . The heat exchanger according to  claim 3 , wherein
 the heat exchange tubes in the rows of the heat exchange tubes disposed in the plurality of heat exchange tube grooves of the plurality of fins comprise a plurality of columns of heat exchange tubes arranged in the third direction, and each of the plurality of columns of heat exchange tubes comprises a plurality of heat exchange tubes arranged in the first direction.   
     
     
         5 . The heat exchanger according to  claim 4 , wherein
 a heat exchange tube in a plurality of columns of heat exchange tubes comprises a first end located on one side of the heat exchange tube in the second direction and a second end located on the other side of the heat exchange tube in the second direction; and   the heat exchanger further comprises a connecting portion, through which the first ends of the heat exchange tubes in one of the plurality of columns of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in another one of the plurality of columns of heat exchange tubes respectively; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends of the heat exchange tubes in one column of heat exchange tubes, and the other of which is connected to and in fluid communication with the second ends of the heat exchange tubes in another column of heat exchange tubes respectively.   
     
     
         6 . The heat exchanger according to  claim 5 , wherein
 the connecting portion comprises a plurality of connecting tubes, through which the first ends of the heat exchange tubes in the one column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the another column of heat exchange tubes respectively.   
     
     
         7 . The heat exchanger according to  claim 6 , wherein
 the heat exchange tubes in the one column of heat exchange tubes, the connecting tubes, and the heat exchange tubes in the another column of heat exchange tubes that are interconnected with one another are formed by a single bent tube.   
     
     
         8 . The heat exchanger according to  claim 4 , wherein
 the heat exchange tube in a plurality of columns of heat exchange tubes comprise a first end located on one side of the heat exchange tube in the second direction and a second end located on the other side of the heat exchange tube in the second direction;   the plurality of columns of heat exchange tubes comprise a first column of heat exchange tubes, a second column of heat exchange tubes, a third column of heat exchange tubes, and a fourth column of heat exchange tubes arranged in sequence in the first direction;   the heat exchanger further comprises a first connecting portion and a second connecting portion, wherein the first ends of the heat exchange tubes in the first column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the third column of heat exchange tubes through the first connecting portion respectively, and the first ends of the heat exchange tubes in the second column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the fourth column of heat exchange tubes through the second connecting portion respectively; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends of the heat exchange tubes in the first column of heat exchange tubes and the second column of heat exchange tubes respectively, and the other of which is connected to and in fluid communication with the second ends of the heat exchange tubes in the third column of heat exchange tubes and the fourth column of heat exchange tubes respectively.   
     
     
         9 . The heat exchanger according to  claim 8 , wherein
 the first connecting portion comprises a plurality of first connecting tubes, through which the first ends of the heat exchange tubes in the first column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the third column of heat exchange tubes respectively; and   the second connecting portion comprises a plurality of second connecting tubes, through which the first ends of the heat exchange tubes in the second column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the fourth column of heat exchange tubes respectively.   
     
     
         10 . The heat exchanger according to  claim 9 , wherein
 the heat exchange tubes in the first column of heat exchange tubes, the first connecting tubes, and the heat exchange tubes in the third column of heat exchange tubes that are interconnected with one another are formed by a single bent tube; and   the heat exchange tubes in the second column of heat exchange tubes, the second connecting tubes, and the heat exchange tubes in the fourth column of heat exchange tubes that are interconnected with one another are formed by a single bent tube.   
     
     
         11 . The heat exchanger according to  claim 1 , wherein
 the plurality of heat exchange tube grooves comprise a plurality of columns of the heat exchange tube grooves arranged in a third direction perpendicular to the first and second directions, each of the plurality of columns of the heat exchange tube grooves comprising a plurality of heat exchange tube grooves arranged in the first direction.   
     
     
         12 . The heat exchanger according to  claim 11 , wherein
 at least two of a plurality of heat exchange tube grooves in at least one of a plurality of columns of heat exchange tube grooves of the plurality of fins have different lengths in the third direction.   
     
     
         13 . The heat exchanger according to  claim 11 , wherein
 a plurality of heat exchange tube grooves in at least one of a plurality of columns of heat exchange tube grooves of the plurality of fins and a plurality of heat exchange tube grooves in at least another one of a plurality of columns of heat exchange tube grooves of the plurality of fins are alternately arranged in the first direction.   
     
     
         14 . The heat exchanger according to  claim 1 , wherein
 the width of the portion of the heat exchange tube groove where the plurality of heat exchange tube guiding segments are provided is configured to gradually decrease in a direction from the first groove end to the second groove end when viewed in the direction perpendicular to the fin body.   
     
     
         15 . The heat exchanger according to  claim 1 , wherein
 the plurality of heat exchange tube guiding segments are straight line segments, circular arc segments, or a combination of the straight line segments and circular arc segments when viewed in the direction perpendicular to the fin body.   
     
     
         16 . (canceled) 
     
     
         17 . (canceled) 
     
     
         18 . The heat exchanger according to  claim 1 , wherein
 a gap between at least one portion of at least one groove wall of the heat exchange tube groove located between the plurality of heat exchange tube guiding segments and the second groove end and the heat exchange tube is less than or equal to 0.15 mm.   
     
     
         19 . (canceled) 
     
     
         20 . The heat exchanger according to  claim 1 , wherein
 one of the two endpoints of the first heat exchange tube guiding segment that is close to the second heat exchange tube guiding segment and one of the two endpoints of the second heat exchange tube guiding segment that is close to the first heat exchange tube guiding segment are configured to substantially overlap with each other when viewed in the direction perpendicular to the fin body.   
     
     
         21 . The heat exchanger according to  claim 2 , wherein
 one of the two endpoints of the first heat exchange tube guiding segment that is close to the second heat exchange tube guiding segment and one of the two endpoints of the second heat exchange tube guiding segment that is close to the first heat exchange tube guiding segment are configured to substantially overlap with each other, and one of the two endpoints of the second heat exchange tube guiding segment that is close to the third heat exchange tube guiding segment and one of the two endpoints of the third heat exchange tube guiding segment that is close to the second heat exchange tube guiding segment are configured to substantially overlap with each other when viewed in the direction perpendicular to the fin body.   
     
     
         22 . The heat exchanger according to  claim 21 , wherein
 the first heat exchange tube guiding segment and the third heat exchange tube guiding segment are straight line segments, and the second heat exchange tube guiding segment is a circular arc segment when viewed in the direction perpendicular to the fin body.   
     
     
         23 . The heat exchanger according to  claim 1 , wherein
 at least one of the plurality of heat exchange tubes is inserted into each of the plurality of the heat exchange tube grooves.   
     
     
         24 . (canceled)