Heat exchange tube and heat exchanger having same

Abstract

A heat exchange tube is a flat tube, and the flat tube includes a tube body, a tube cavity, a first member and a welding portion. The tube body includes a first side wall. The flat tube further includes a plurality of channels. The welding portion is positioned in at least one channel. On a cross section of the flat tube, a cross section of the welding portion partially overlaps a flow cross section of the channel and is connected to the first side wall, a maximum height of the cross section of the welding portion in a height direction of the flat tube is D, and D meets the following condition: N*(Wb+0.2D)>0.0017Wt 2 +0.0175Wt+0.3713, or N*(Wb+0.2D)<0.0119Wt 2 +0.086Wt+2.9649. A quantity of the channels of the flat tube is N, a thickness of the first member is Wb, and a width of the flat tube is Wt.

1 . A heat exchange tube, wherein the heat exchange tube is a flat tube, and the flat tube comprises;
 a tube body and a tube cavity defined in the tube body, wherein the tube body comprises a first side wall and a second side wall that are arranged in a height direction of the flat tube;   a plurality of channels arranged at intervals in the tube cavity in a width direction of the flat tube, wherein length directions of the plurality of channels are parallel to a length direction of the flat tube;   a first member, a part of the first member being located between two adjacent channels; and   a welding portion located in at least one of the channels and welding the first member with the tube body,   wherein on a cross section of the flat tube, a cross section of the welding portion partially overlaps a flow cross section of the channel and is connected to the first side wall, a maximum height of the cross section of the welding portion in the height direction of the flat tube is D, and D meets at least one following condition of:
   N*(Wb+0.2D)>0.0017Wt 2 +0.0175Wt+0.3713; or 
   N*(Wb+0.2D)<0.0119Wt 2 +0.086Wt+2.9649; 
   wherein a quantity of the channels of the flat tube is N, a thickness of the first member is Wb, and a width of the flat tube is Wt.   
     
     
         2 . The heat exchange tube according to  claim 1 , wherein a height of the flat tube is H, the height H of the flat tube, the quantity N of the channels of the flat tube, and the width Wt of the flat tube meet the following conditions:
   {(N−2)/20} 2 *{(Wt−16)/16} 3 >0.05; and
     H*Wt<80.   
     
     
         3 . The heat exchange tube according to  claim 4 , wherein a height of the flat tube is H, the height H of the flat tube, the quantity N of the channels of the flat tube, and the width Wt of the flat tube meet the following conditions:
   {(N−2)/20} 2 *{(Wt−16)/16} 3 >0.3; and
     H*Wt<80.   
     
     
         4 . The heat exchange tube according to  claim 1 , wherein D meets: 0.1<(H−4*D)/H<0.9. 
     
     
         5 . A heat exchange tube, wherein the heat exchange tube is a flat tube, and the flat tube comprises;
 a tube body and a tube cavity defined in the tube body, wherein the tube body comprises a first side wall and a second side wall that are arranged in a height direction of the flat tube;   a plurality of channels, arranged at intervals in the tube cavity in a width direction of the flat tube, wherein length directions of the plurality of channels are parallel to a length direction of the flat tube;   a first member, a part of the first member being located between two adjacent channels; and   a welding portion located in at least one of the channels and welding the first member with the tube body,   wherein on a cross section of the flat tube, a cross section of the welding portion partially overlaps a flow cross section of the channel and is connected to the first side wall; and on the flow cross section of the channel, the cross section of the welding portion comprises a contour line, the contour line comprises a plurality of circular arcs, a radius of curvature of the circular arc is R, and at least one R meets at lease one following condition of:
   N*(Wb+0.15R)>0.0017Wt 2 +0.0175Wt+0.3713; or 
   N*(Wb+0.15R)<0.0119Wt 2 +0.086Wt+2.9649; 
   wherein a quantity of the channels is N, a thickness of the first member is Wb, and a width of the flat tube is Wt.   
     
     
         6 . The heat exchange tube according to  claim 5 , wherein a height of the flat tube is H, the height H of the flat tube, the quantity N of the channels of the flat tube, and the width Wt of the flat tube meet the following conditions:
   {(N−2)/20} 2 *{(Wt−16)/16} 3 >0.05; and
     H*Wt<80.   
     
     
         7 . The heat exchange tube according to  claim 5 , wherein a height of the flat tube is H, the height H of the flat tube, the quantity N of the channels of the flat tube, and the width Wt of the flat tube meet the following conditions:
   {(N−2)/20} 2 *{(Wt−16)/16} 3 >0.3; and
     H*Wt<80.   
     
     
         8 . The heat exchange tube according to  claim 1 , wherein the width Wt of the flat tube is less than 40 mm and greater than 16 mm, and the quantity N of the channels of the flat tube is greater than 14. 
     
     
         9 . The heat exchange tube according to  claim 1 , wherein the width Wt of the flat tube is less than 36 mm and greater than 16 mm, and the quantity N of the channels of the flat tube is greater than 20. 
     
     
         10 . The heat exchange tube according to  claim 2 , wherein a ratio of the height H of the flat tube to the width Wt of the flat tube is less than 0.0512. 
     
     
         11 . A heat exchanger, comprising:
 a first pipe and a second pipe; and   a heat exchange tube, wherein the heat exchange tube communicates the first pipe with the second pipe, the heat exchange tube is a flat tube, and the flat tube comprises:
 a tube body and a tube cavity defined in the tube body, wherein the tube body comprises a first side wall and a second side wall that are arranged in a height direction of the flat tube; 
 a plurality of channels arranged at intervals in the tube cavity in a width direction of the flat tube, wherein length directions of the plurality of channels are parallel to a length direction of the flat tube; 
 a first member, a part of the first member being located between two adjacent channels; and 
 a welding portion located in at least one of the channels and welding the first member with the tube body, 
 wherein on a cross section of the flat tube, a cross section of the welding portion partially overlaps a flow cross section of the channel and is connected to the first side wall, a maximum height of the cross section of the welding portion in the height direction of the flat tube is D, and D meets at least one following condition of:
   N*(Wb+0.2D)>0.0017Wt 2 +0.0175Wt+0.3713; or 
   N*(Wb+0.2D)<0.0119Wt 2 +0.086Wt+2.9649; 
 
 wherein a quantity of the channels of the flat tube is N, a thickness of the first member is Wb, and a width of the flat tube is Wt. 
   
     
     
         12 . The heat exchange tube according to  claim 5 , wherein the width Wt of the flat tube is less than 40 mm and greater than 16 mm, and the quantity N of the channels of the flat tube is greater than 14. 
     
     
         13 . The heat exchange tube according to  claim 5 , wherein the width Wt of the flat tube is less than 36 mm and greater than 16 mm, and the quantity N of the channels of the flat tube is greater than 20. 
     
     
         14 . The heat exchange tube according to  claim 3 , wherein a ratio of the height H of the flat tube to the width Wt of the flat tube is less than 0.0512. 
     
     
         15 . The heat exchange tube according to  claim 6 , wherein a ratio of the height H of the flat tube to the width Wt of the flat tube is less than 0.0512. 
     
     
         16 . The heat exchange tube according to  claim 7 , wherein a ratio of the height H of the flat tube to the width Wt of the flat tube is less than 0.0512.