Heat exchanger and manufacturing method thereof

Abstract

A heat exchanger includes a main body portion and a cover. The main body portion includes a heat exchange core, a collecting pipe portion and a first mounting shell. The collecting pipe portion includes a first collecting pipe portion and a second collecting pipe portion. Both the first collecting pipe portion and the second collecting pipe portion are provided with mounting end plates. Two ends of the first mounting shell are hermetically connected to the mounting end plates by brazing. The first mounting shell encloses part of the heat exchange core in a circumferential direction. Two ends of the cover are hermetically connected to the mounting end plates by bonding. The cover and the first mounting shell are arranged in an enclosing manner in the circumferential direction. The heat exchanger improves stability and reliability. A manufacture method of the heat exchanger is also disclosed.

What is claimed is: 
     
         1 . A heat exchanger, comprising: a main body portion and a cover;
 the main body portion comprising a heat exchange core, a collecting pipe portion and a first mounting shell;   the heat exchange core comprising at least one heat exchange tube, the heat exchange tube having at least one tube inner channel and a tube wall located on a periphery of the tube inner channel;   the collecting pipe portion comprising a first collecting pipe portion and a second collecting pipe portion, the first collecting pipe portion and the second collecting pipe portion being located on two sides of the heat exchange core along a length direction of the heat exchange core, respectively; each of the first collecting pipe portion and the second collecting pipe portion comprising a mounting end plate; the mounting end plates being hermetically connected to the heat exchange tube by brazing; the tube inner channel of the heat exchange tube being in communication with an inner cavity of the first collecting pipe portion and an inner cavity of the second collecting pipe portion; and   the first mounting shell enclosing a part of the heat exchange core in a circumferential direction of the heat exchange core, two ends of the first mounting shell along the length direction of the heat exchange core being hermetically connected to the mounting end plates by brazing; two ends of the cover along the length direction of the heat exchange core being hermetically connected to the mounting end plates by bonding; the cover and the first mounting shell being arranged in an enclosing manner along the circumferential direction of the heat exchange core, and the cover and the first mounting shell being hermetically connected along the length direction of the heat exchange core by bonding.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein the first mounting shell comprises a first connecting wall and two first side walls, the two first side walls are opposite to each other, the two first side walls are connected to opposite sides of the first connecting wall along the length direction of the heat exchange core, and the first side walls extend from the first connecting wall along a height direction of the heat exchange core. 
     
     
         3 . The heat exchanger according to  claim 2 , wherein the heat exchange tube is provided with a plurality of channels, the plurality of channels are arranged along a direction parallel to the first connecting wall. 
     
     
         4 . The heat exchanger according to  claim 2 , wherein the first mounting shell further comprises a first flange portion connected to an end of the first side wall, the first flange portion extends from the first side wall in a direction away from the heat exchange core; and
 the cover comprises a second connecting wall and two extension portions connected to the second connecting wall, the two extension portions are located on different sides in a width direction of the second connecting wall, respectively, at least part of the heat exchange core is located between the first connecting wall and the second connecting wall, the extension portion and the first flange portion are at least partially arranged oppositely along the height direction of the heat exchange core, and the extension portion is at least partially bonded to the first flange portion.   
     
     
         5 . The heat exchanger according to  claim 4 , wherein a side of the cover facing the heat exchange core is further provided with a first boss, two sides of the first boss in a width direction of the heat exchange core are in contact with the two first flange portions, respectively, and at least part area of the extension portion located on a periphery of the first boss is connected to the first flange portion by bonding. 
     
     
         6 . The heat exchanger according to  claim 5 , wherein a height of the first boss is 0.1 mm to 1 mm; and a width of an area of the extension portion for bonding with the first flange portion along an extension direction away from the second connecting wall is greater than or equal to 3 mm. 
     
     
         7 . The heat exchanger according to  claim 5 , wherein the first boss is provided with a recessed portion, the recessed portion is recessed from an end in a convex direction of the first boss along a direction away from the heat exchange core, and the heat exchange core is connected with a side of the recessed portion by direct contact, or by bonding. 
     
     
         8 . The heat exchanger according to  claim 7 , wherein a distance between a bottom of the recessed portion and a side of the cover away from the heat exchange core is greater than or equal to a distance from the bottom of the recessed portion to a top of the first boss. 
     
     
         9 . The heat exchanger according to  claim 4 , wherein the first mounting shell further comprises a second flange portion connected to an end of the first flange portion, the second flange portion extends from the first flange portion along the height direction of the heat exchange core; and
 the second flange portion is arranged opposite to at least part area of a side wall of the extension portion along a width direction of the heat exchange core, and a side of the second flange portion facing the side wall of the extension portion is connected with the at least part area of the side wall of the extension portion by bonding.   
     
     
         10 . The heat exchanger according to  claim 2 , wherein the cover comprises a second connecting wall and two second side walls, the two second side walls are connected to different sides in a width direction of the second connecting wall; the second side walls extend from the second connecting wall to a heat exchange core locating side; and the heat exchange core is located between the first connecting wall and the second connecting wall; and
 along the height direction of the heat exchange core, a length of the first side wall is greater than a length of the second side wall; and the second side wall is fixed to a side of the first side wall away from the heat exchange core by bonding.   
     
     
         11 . The heat exchanger according to  claim 1 , wherein the mounting end plate comprises a first plate portion and a second boss, the second boss protrudes from the first plate portion toward a side of the heat exchange core; the mounting end plate is provided with an insertion hole, a part of the heat exchange tube is received in the insertion hole, the insertion hole extends through the second boss and the first plate portion, an end of the cover close to the mounting end plate is provided with a third flange portion extending in a direction away from the heat exchange core, and at least part area of the first plate portion located on a periphery of the second boss is fixed to the third flange portion by bonding. 
     
     
         12 . The heat exchanger according to  claim 1 , wherein a material of the cover is a non-metallic material. 
     
     
         13 . The heat exchanger according to  claim 1 , wherein a glue located between the cover and the first mounting shell, and located between the cover and the mounting end plate is a high-strength epoxy-based two-component structural glue, or a high-strength epoxy-based single-component sealing structural glue, and a thickness of the glue is 0.1 mm to 0.5 mm. 
     
     
         14 . The heat exchanger according to  claim 13 , wherein surfaces of the cover, the first mounting shell and the mounting end plate for contacting respectively with the glue are selected from one of a flat surface and an uneven tongued and grooved surface. 
     
     
         15 . A manufacturing method of a heat exchanger, comprising following steps:
 providing a heat exchange core, a first collecting pipe portion, a second collecting pipe portion and a first mounting shell, the heat exchange core comprising at least one heat exchange tube, each of the first collecting pipe portion and the second collecting pipe portion comprising a mounting end plate, the mounting end plate being provided with an insertion hole adaptable to the heat exchange tube; inserting one end of the heat exchange tube in a length direction of the heat exchange tube into the insertion hole provided on the mounting end plate of the first collecting pipe portion, inserting the other end of the heat exchange tube in the length direction into the insertion hole provided on the mounting end plate of the second collecting pipe portion, and arranging the first mounting shell in close contact with the heat exchange core along a length direction of the heat exchange core;   fixing the heat exchange core, the first collecting pipe portion, the second collecting pipe portion and the first mounting shell as a whole by brazing; wherein a tube wall of the heat exchange tube is hermetically connected to the mounting end plate at the insertion hole, and a tube inner channel of the heat exchange tube is in communication with an inner cavity of the first collecting pipe portion and an inner cavity of the second collecting pipe portion; and   providing a cover, hermetically connecting the cover and the first mounting shell in the length direction of the heat exchange core by bonding, and hermetically connecting the cover and the mounting end plate by bonding; the cover and the first mounting shell being arranged in an enclosing manner along a circumferential direction of the heat exchange core.   
     
     
         16 . A heat exchanger, comprising: a first collecting pipe defining a first chamber extending along a height direction;
 a second collection pipe extending parallel to the first collecting pipe, the second collection pipe defining a second chamber, the first collecting pipe and second collection pipe forming a refrigerant inlet and a refrigerant outlet;   a plurality of heat exchange tubes connecting the first collecting pipe and the second collecting pipe, each exchange tube extending along a length direction perpendicular to the height direction and forming a plurality of micro-channels fluid communication with the first and second collecting pipes, the micro-channels being arranged along a width direction perpendicular to the height direction and the length direction, the micro-channels in fluid communication with the first chamber, the second chamber, the refrigerant inlet and the refrigerant outlet; and   an outer shell connecting between the first and second heat exchange tubes and enclosing around the heat exchange tubes, the outer shell forming a third chamber located therein, a coolant inlet fluid communication with the third chamber and a coolant outlet fluid communication with the third chamber, the outer shell comprising a first shell and a second shell assembled together;   wherein the first shell and second shell are retained to each other by bonding.   
     
     
         17 . The heat exchanger according to  claim 16 , wherein the first collecting pipe, the second collecting pipe, the second shell are retained together by brazing, and the first shell are retained to the first and second collecting pipes by bonding. 
     
     
         18 . The heat exchanger according to  claim 16 , wherein the second shell forms a receiving slot for receiving all of the heat exchange tubes therein;
 the second shell comprise a bottom wall and two side walls extending upwardly from the bottom wall along the height direction;   the first shell comprises a top wall, a pair of first flanges connecting with two opposite sides of the top wall in the width direction, respectively, and a pair of second flanges connecting with two opposite sides of the top wall in the length direction, respectively;   the first flanges are bonded to two corresponding side walls, and the second flanges are bonded to the first and second collecting pipes, respectively.   
     
     
         19 . The heat exchanger according to  claim 18 , wherein the first flange extends downwardly from top wall along the height direction, the second flange extending upwardly from the top wall and extending outwardly from the first flange. 
     
     
         20 . The heat exchanger according to  claim 18 , further comprising a first pipe and a second pipe disposed at two opposite sides of the second shell, the first pipe fluid communication with the third chamber, the second pipe fluid communication with the third chamber;
 the first pipe being disposed closer to the first collecting pipe than the second pipe, the second pipe being disposed closer to the second collecting pipe than the first pipe;   the first pipe being disposed closer to the top wall than the second pipe, the second pipe being disposed closer to the bottom wall than the first pipe.