Heat Exchanger

Abstract

The disclosure provides a heat exchanger. The heat exchanger includes: a heat exchange tube bank, where the heat exchange tube bank includes a flat tube and a connection joint; the flat tube includes a first straight tube section, a bent tube section and a second straight tube section, and the first straight tube section, the bent tube section and the second straight tube section are sequentially connected to form a U-shaped tube structure; the plurality of flat tubes are disposed at intervals, and the connection joint is disposed between two adjacent flat tubes; the connection joint has a first connection port and a second connection port that are in communication with each other, the first connection port is connected with the first straight tube section, and the second connection port is connected with the second straight tube section; and the connection joint is a U-shaped joint.

What is claimed is: 
     
         1 . A heat exchanger, comprising:
 a heat exchange tube bank, wherein the heat exchange tube bank comprises a plurality of flat tubes and a connection joint; each of the plurality of flat tubes comprises a first straight tube section, a bent tube section and a second straight tube section, and the first straight tube section, the bent tube section and the second straight tube section are sequentially connected to form a U-shaped tube structure; and the plurality of flat tubes are disposed at intervals, and two adjacent flat tubes are in communication with each other through the connection joint.   
     
     
         2 . The heat exchanger as claimed in  claim 1 , wherein the connection joint has a first connection port and a second connection port that are in communication with each other; the first connection port is connected with the first straight tube section, and the second connection port is connected with the second straight tube section; and the connection joint is a U-shaped joint, and the first connection port and the second connection port are disposed at two ends of the U-shaped joint respectively. 
     
     
         3 . The heat exchanger as claimed in  claim 1 , wherein the plurality of flat tubes are uniformly distributed in rows to form a flat tube bank structure, the flat tube bank structure comprises a plurality of flat tube rows disposed at intervals in a first preset direction, the flat tube row comprises a plurality of flat tubes disposed at intervals in a second preset direction, and the first preset direction and the second preset direction are set with a predetermined angle therebetween; and
 the connection joint is disposed between two adjacent flat tubes in each flat tube row, and the connection joint is disposed between two adjacent flat tube rows, such that the flat tubes in the each flat tube row are in communication with one another and then in communication with an adjacent flat tube row.   
     
     
         4 . The heat exchanger as claimed in  claim 3 , wherein the connection joints comprise:
 a first connection joint disposed between the two adjacent flat tubes of the each flat tube row, wherein a first connection port of the first connection joint and a second connection port of the first connection joint are disposed at an interval in the second preset direction.   
     
     
         5 . The heat exchanger as claimed in  claim 3 , wherein the connection joints comprise:
 a second connection joint disposed between the two adjacent flat tube rows, wherein a first connection port of the second connection joint and a second connection port of the second connection joint are disposed at an interval in the first preset direction.   
     
     
         6 . The heat exchanger as claimed in  claim 5 , wherein the flat tube rows are disposed in a staggered manner, and the first connection port of the second connection joint and the second connection port of the second connection joint are disposed at an interval in the second preset direction. 
     
     
         7 . The heat exchanger as claimed in  claim 3 , further comprising:
 a fin, wherein the fin is provided with a plurality of snap-fit portions, the plurality of snap-fit portions and the plurality of flat tube rows are disposed in a one-to-one correspondingly manner, and each of the plurality of snap-fit portions is snapped on a corresponding flat tube row.   
     
     
         8 . The heat exchanger as claimed in  claim 7 , wherein the flat tube bank structure comprises two flat tube rows disposed at an interval, the plurality of snap-fit portions comprise a plurality of first snap-fit open slots disposed at intervals in the second preset direction and a plurality of second snap-fit open slots disposed at intervals in the second preset direction, the first snap-fit open slot and the second snap-fit open slot are disposed at two sides of the fin respectively, and an opening direction of the first snap-fit open slot is opposite to an opening direction of the second snap-fit open slot. 
     
     
         9 . The heat exchanger as claimed in  claim 3 , wherein
 a distance between two adjacent flat tube rows is Wp, and 15≤Wp≤65.   
     
     
         10 . The heat exchanger as claimed in  claim 1 , wherein a plurality of heat exchange tube banks are arranged, and the plurality of heat exchange tube banks are disposed at intervals; each of the plurality of heat exchange tube banks has an inlet tube and an outlet tube, and the heat exchanger further comprises an inlet distribution head; and the inlet tube is in communication with the inlet distribution head. 
     
     
         11 . The heat exchanger as claimed in  claim 10 , further comprising an outlet manifold, wherein the outlet tube is in communication with the outlet manifold. 
     
     
         12 . The heat exchanger as claimed in  claim 3 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35. 
     
     
         13 . The heat exchanger as claimed in  claim 6 , wherein a distance between two adjacent flat tube rows is Wp, and 15≤Wp≤65. 
     
     
         14 . The heat exchanger as claimed in  claim 8 , wherein a distance between two adjacent flat tube rows is Wp, and 15≤Wp≤65. 
     
     
         15 . The heat exchanger as claimed in  claim 4 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35. 
     
     
         16 . The heat exchanger as claimed in  claim 5 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35. 
     
     
         17 . The heat exchanger as claimed in  claim 6 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35. 
     
     
         18 . The heat exchanger as claimed in  claim 7 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35. 
     
     
         19 . The heat exchanger as claimed in  claim 8 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35. 
     
     
         20 . The heat exchanger as claimed in  claim 9 , wherein a distance between two adjacent flat tubes in each flat tube row is Lp, and 6.5≤Lp≤35.