Connecting Tube and Heat Exchanger

Abstract

The disclosure provides a connecting tube and a heat exchanger. The connecting tube is configured to be connected with flat tubes. The connecting tube includes: two connection sections and a bent section, the two connection sections are disposed at two ends of the bent section respectively, the two connection sections are connected with the bent section to form a U-shaped tube, and an end, far away from the bent section, of the connection section is provided with a connection port; and the connection port has a flat mouth structure. According to a technical solution provided by the disclosure, a technical problem that a manufacturing process of a flat tube in the art known to inventors is complicated can be solved.

What is claimed is: 
     
         1 . A connecting tube, configured to be connected with flat tubes, and comprising:
 two connection sections and a bent section, the two connection sections are disposed at two ends of the bent section respectively, the two connection sections are connected with the bent section to form a U-shaped tube, and an end, far away from the bent section, of each of the two connection sections is provided with a connection port; and   the connection port has a flat mouth structure.   
     
     
         2 . The connecting tube as claimed in  claim 1 , wherein the bent section is a round tube, each of the two connection sections comprises a transition zone and a flat tube zone, an end, connected with the bent section, of the transition zone is provided with a round mouth, and an end, connected with the flat tube zone, of the transition zone is provided with a flat mouth. 
     
     
         3 . The connecting tube as claimed in  claim 2 , wherein each of the two connection sections further comprises a connection flange, and the connection flange is disposed at an end, far away from the transition zone, of the flat tube zone. 
     
     
         4 . The connecting tube as claimed in  claim 3 , wherein the connection flange is folded towards an outer side of the connecting tube. 
     
     
         5 . The connecting tube as claimed in  claim 1 , wherein the two connection sections are disposed at an interval, and a projection of one connection section on a central plane of an other connection section is disposed to be staggered from the central plane of the other connection section. 
     
     
         6 . The connecting tube as claimed in  claim 5 , wherein
 a longitudinal distance between the two connection sections is set as H1, and 5 mm<H1≤15 mm; or,   a transverse distance between the two connection sections is set as W, and 12 mm<W≤45 mm.   
     
     
         7 . The connecting tube as claimed in  claim 1 , wherein the two connection sections are disposed at an interval, and a projection of one connection section on a central plane of an other connection section is disposed to coincide with the central plane of the other connection section. 
     
     
         8 . The connecting tube as claimed in  claim 7 , wherein a longitudinal distance between the two connection sections is set as H2, and 5 mm<H2≤15 mm. 
     
     
         9 . The connecting tube as claimed in  claim 1 , wherein
 a length of the bent section is set as L1, and 15 mm≤L1≤35 mm; or,   a length of each of the two connection sections is set as L2, and 0 mm<L2≤8 mm.   
     
     
         10 . A heat exchanger, comprising:
 a plurality of flat tubes, and the plurality of flat tubes are disposed at intervals; and   a connecting tube, wherein the connecting tube is the connecting tube as claimed in  claim 1 , and the connecting tube is disposed between two adjacent flat tubes, the two adjacent flat tubes are in communication with each other through the connecting tube.   
     
     
         11 . The connecting tube as claimed in  claim 1 , wherein a width of the connection port is set as d, and 5 mm≤d≤30 mm; or,
 a height of the connection port is set as h, and 1.3 mm≤h≤4.5 mm 
 
     
     
         12 . The connecting tube as claimed in  claim 1 , wherein a diameter of the bent section is set as φA, and 5 mm≤φA≤15.88 mm 
     
     
         13 . A heat exchanger, comprising:
 a plurality of flat tubes, and the plurality of flat tubes are disposed at intervals; and   a connecting tube, wherein the connecting tube is the connecting tube as claimed in  claim 4 , and the connecting tube is disposed between two adjacent flat tubes, the two adjacent flat tubes are in communication with each other through the connecting tube.