Micro-channel heat exchanger

Abstract

A micro-channel heat exchanger is provided. The micro-channel heat exchanger includes a plurality of fins and a plurality of flat tubes, wherein the plurality of fins are arranged in parallel to form multiple rows, and the fins are provided with insertion slots; and the plurality of flat tubes are arranged in parallel to form multiple layers, and the flat tubes are arranged in the insertion slots in a penetrating manner. The micro-channel heat exchanger further comprises a distributor and adapter tubes, wherein the distributor is provided with a plurality of capillary tubes, one end of the adapter tube is connected to and in communication with the capillary tubes, and the other end of the adapter tube is connected to and in communication with the flat tubes.

What is claimed is: 
     
         1 . A micro-channel heat exchanger, comprising
 a plurality of fins and a plurality of flat tubes, wherein the plurality of fins are arranged in parallel to form a plurality of rows, each of the plurality of fins is provided with a insertion slot, the plurality of flat tubes are arranged in parallel to form a plurality of layers, and the plurality of flat tubes penetrate through the insertion slots;   the micro-channel heat exchanger further comprises a distributor and an adapter, the distributor is provided with a plurality of capillary tubes, an end of the adapter is connected to and in communication with a corresponding one of the plurality of capillary tubes, and the other end of the adapter is connected to and in communication with a corresponding one of the plurality of flat tubes.   
     
     
         2 . The micro-channel heat exchanger of  claim 1 , wherein the micro-channel heat exchanger comprises a plurality of adapters, one end of one part of the plurality of adapters is connected to and in communication with the plurality of capillary tubes, the other end of the one part of the plurality of adapters is connected to and in communication with the plurality of flat tubes, and both ends of another part of the plurality of adapters are connected to and in communication with the plurality of flat tubes; and/or,
 each of the plurality of adapters comprises a first tube orifice matching with the plurality of flat tubes, the first tube orifice is configured for allowing insertion of the plurality of flat tubes, an inner surface of each of the plurality of adapters is provided with a limiting portion, and the limiting portion abuts against one end of corresponding one of the plurality of flat tubes and/or a sidewall of corresponding one of the plurality of flat tubes and is configured for limiting corresponding one of the plurality of flat tubes.   
     
     
         3 . The micro-channel heat exchanger of  claim 2 , wherein the limiting portion comprises a first protruding portion and a second protruding portion, the first protruding portion and the second protruding portion are arranged at intervals along a length direction of corresponding one of the plurality of adapters, the first protruding portion is disposed away from the first tube orifice relative to the second protruding portion, a height of the first protruding portion protruding out of the inner wall of corresponding one of the plurality of adapters is greater than a height of the second protruding portion protruding out of the inner wall of corresponding one of the plurality of adapters, the first protruding portion is configured for abutting against the end of corresponding one of the plurality of flat tubes, and the second protruding portion is configured for abutting against an outer surface of corresponding one of the plurality of flat tubes. 
     
     
         4 . The micro-channel heat exchanger of  claim 3 , wherein the height of the second protruding portion protruding out of the inner surface of corresponding one of the plurality of adapters is defined as H 4 , a height of the plurality of flat tubes is defined as H 1 , each of the plurality of adapters comprises a first inner surface and a second inner surface opposite to each other, the second protruding portion is disposed on the first inner surface and/or the second inner surface, a distance between the first inner surface and the second inner surface is defined as H 2 , and the height H 4  of the second protruding portion protruding out of the inner surface of corresponding one of the plurality of adapters, the distance H 2  between the first inner surface and the second inner surface and the height H 1  of the plurality of flat tubes satisfy the following formula: 0 mm≤[H 4 −(H 2 −H 1 )]≤0.2 mm; and/or,
 the height of the first protruding portion protruding out of the inner surface of corresponding one of the plurality of adapters is defined as H 3 , a height of the plurality of flat tube is defined as H 1 , each of the plurality of adapters comprises a first inner surface and a second inner surface opposite to each other, the first protruding portion is disposed on the first inner surface and/or the second inner surface, a distance between the first inner surface and the second inner surface is defined as H 2 , and the height H 3  of the first protruding portion protruding out of the inner surface of corresponding one of the plurality of adapters, the distance H 2  between the first inner surface and the second inner surface and the height H 1  of the plurality of flat tubes satisfy the following formula: 0.2 mm≤[H 3 −(H 2 −H 1 )]≤3 mm; and/or, 
 a distance between the first protruding portion and an end surface of the first tube orifice is defined as L 3 , and the distance L 3  between the first protruding portion and the end surface of the first tube orifice satisfies the following formula: 2 mm≤L 3 ≤10 mm. 
 
     
     
         5 . The micro-channel heat exchanger of  claim 1 , wherein a height of the plurality of flat tubes is defined as H 1 , each of the plurality of adapters comprises a first inner surface and a second inner surface opposite to each other, a distance between the first inner surface and the second inner surface is defined as H 2 , and the distance H 2  between the first inner surface and the second inner surface and the height H 1  of the plurality of flat tubes satisfy the following formula: 0.02 mm≤(H 2 −H 1 )≤0.4 mm. 
     
     
         6 . The micro-channel heat exchanger of  claim 2 , each of the plurality of adapters comprises a second tube orifice, the second tube orifice is located at an end of the each of the plurality of adapters away from the first tube orifice, and the second tube orifice is circle-shaped; or, the plurality of adapters are curved-shaped and the first tube orifice is located at both ends of each of the plurality of adapters. 
     
     
         7 . The micro-channel heat exchanger of  claim 1 , the micro-channel heat exchanger further comprises a shrinking tube and a flared tube, the flared tube is connected to and in communication with a corresponding one of the plurality of adapters, and the shrinking tube is connected to and in communication with a corresponding one of the plurality of flat tubes, the shrinking tube is formed by a part of corresponding one of the plurality of flat tubes shrinking, and the flared tube is formed by a part of corresponding one of plurality of adapters flaring; or, the shrinking tube is connected to and in communication with the corresponding one of the plurality of adapters, and the flared tube is connected to and in communication with a corresponding one of the plurality of flat tubes, the flared tube is formed by a part of corresponding one of plurality of flat tubes flaring, and the shrinking tube is formed by a part of corresponding one of the plurality of adapters shrinking; and, the shrinking tube is sleeved with a welding ring, and the shrinking tube penetrates into the flared tube and is connected to the flared tube by welding; and/or,
 the micro-channel heat exchanger further comprises a shrinking tube and a flared tube, an outer surface of the shrinking tube is in clearance fit with an inner surface of the flared tube and a gap is defined between the outer surface of the shrinking tube and the inner surface of the flared tube, the gap between the outer surface of the shrinking tube and the inner surface of the flared tube is defined as H, and the gap H between the outer surface of the shrinking tube and the inner surface of the flared tube satisfies the following formula: 0.1 mm≤H≤0.35 mm.   
     
     
         8 . The micro-channel heat exchanger of  claim 7 , wherein the shrinking tube comprises a first section and a second section connected to each other, an outer size of the first section gradually decreases along a direction from the first section to the second section, the welding ring is sleeved outside the first section, a length of the first section is defined as L 1  along an axis of the shrinking tube, and a dimension of a cross section of the welding ring is defined as D 1 , and the dimension D 1  of the cross section of the welding ring and the length L 1  of the first section satisfy the following formula: D 1 ≤L 1 ≤1.2D 1 ; and/or,
 the shrinking tube comprises a first section and a second section connected to each other, a length of the second section is defined as L 2 , and the length L 2  of the second section satisfies the following formula: 3 mm≤L 2 ≤5 mm; and/or, 
 the shrinking tube comprises a first section and a second section connected to each other, the first section is connected to corresponding one of the plurality of flat tubes, a width of the plurality of flat tubes is defined as W 1 , a width of the second section is defined as W 2 , the welding ring is elliptical ring-shaped, and a long axis of an inner ring of the welding ring is defined as D, and the width W 1  of the plurality of flat tubes, the width W 2  of the second section and the long axis D of the inner ring of the welding ring satisfy the following formula: W 2 ≤D≤W 1 ; and/or, 
 the shrinking tube comprises a first section and a second section connected to each other, the first second is connected to corresponding one of the plurality of flat tubes, and a width of the plurality of flat tubes is defined as W 1 , and the dimension D 1  of the cross section of the welding ring and the width W 1  of the plurality of flat tubes satisfy the following formula: D 1 =0.06W 1 ; and/or, 
 the shrinking tube comprises a first section and a second section connected to each other, the first section is connected to corresponding one of the plurality of flat tubes, an inner width of the shrinking tube is defined as W 3 , and an inner width of each of the plurality of adapters is defined as W 4 , and the inner width W 3  of the shrinking tube and the inner width W 4  of each of the plurality of adapters satisfy the following formula: 0.8W 4 ≤W 3 ≤1.2W 4 . 
 
     
     
         9 . The micro-channel heat exchanger of  claim 1 , wherein the micro-channel heat exchanger comprises at least two columns of flat tubes, the micro-channel heat exchanger further comprises a plurality of bending pipes, adjacent two of the at least two columns of flat tubes are connected to and in communication with each other via the plurality of bending pipes, and the plurality of bending pipes and the at least two columns of flat tubes are disposed separately; and/or, flat tubes in the same column of the at least two columns of flat tubes are connected to and in communication with each other via the plurality of bending pipes, and the plurality of bending pipes and the at least two columns of flat tubes are disposed separately. 
     
     
         10 . The micro-channel heat exchanger of  claim 1 , wherein the plurality of flat tubes are disposed at intervals, each of the plurality of fins is provided with a plurality of insertion slots, the plurality of insertion slots are disposed at intervals along a direction each of the plurality of fins; a shape of each of the plurality of insertion slots correspondingly matches with a shape of each of the plurality of flat tubes, allowing the plurality of fins to insert on the plurality of flat tubes via the plurality of insertion slots; and the micro-channel heat exchanger further comprises a bending pipe, the bending pipe comprises two connecting sections and a bending section, the two connecting sections are disposed at both ends of the bending sections respectively, the two connecting sections and the bending section are connected to and in communication with each other to define a U-shaped tube structure, and the two connecting sections are connected to and in communication with two of the plurality of flat tubes, respectively, wherein a depth of the connecting section being sleeved on the flat tube is defined as P, and the depth P of the connecting section being sleeved on the flat tube satisfies the following formula: 2 mm≤P≤20 mm; and/or,
 a width of each of the plurality of insertion slots is defined as Gw, a height of each of the plurality of insertion slots is defined as Gt, and the width Gw of each of the plurality of insertion slots and the height GI of each of the plurality of insertion slots satisfy the a following formula: 1.5≤Gw/Gt≤10. 
 
     
     
         11 . The micro-channel heat exchanger of  claim 10 , wherein the inner surface of the connecting section is consisted of a top surface, a first side surface, a bottom surface and a second side surface in order, both the top surface and the bottom surface are planes; both the first side surface and the second side surface are arc-shaped surfaces; or, both the first side surface and the second side surface are planes, an arc-shaped transition surface is defined between top surface and the first side surface and between the bottom surface and the first side surface, respectively, and an arc-shaped transition surface is defined between top surface and the second side surface and between the bottom surface and the second side surface, respectively; or, both the first side surface and the second side surface are ellipsoid-shaped surfaces; or, both the first side surface and the second side surface are bended surfaces. 
     
     
         12 . The micro-channel heat exchanger of  claim 10 , wherein each of the two connecting sections of the bending pipe has an axisymmetric structure, symmetry centers of the two connecting sections define a connecting axis, an angle between the connecting axis and a length of a orifice of the bending pipe is defined as α, and the angle α between the connecting axis and the length of the orifice of the bending pipe satisfies the following formula: 0≤α≤90°. 
     
     
         13 . The micro-channel heat exchanger of  claim 1 , wherein the plurality of fins are provided with a plurality of first protrusions and the plurality of first protrusions are round-shaped, crescent-shaped, triangle-shaped, square-shaped, S-shaped or corrugation-shaped; and/or,
 the plurality of first protrusions are provided with a stripe-shaped slot, and an air passage is defined by the stripe-shaped slot that penetrates through a surface of the plurality of fins.   
     
     
         14 . The micro-channel heat exchanger of  claim 1 , wherein the plurality of fins comprises a first side and a second side, the plurality of fins are provided with a plurality of second protrusions on a side of the plurality of fins adjacent to the first side, the plurality of second protrusions are disposed in sequence along a width direction of the plurality of fins and form a corrugation-shaped structure, both ends of the corrugation structure extend along a length direction of the plurality of fins and penetrate through both ends of corresponding one of the plurality of fins. 
     
     
         15 . The micro-channel heat exchanger of  claim 10 , wherein the plurality of fins comprise a body portion and a flanging structure connected to each other, the plurality of insertion slots are disposed on the body portion, the flanging structure is disposed adjacent to the plurality of inserting slots, the flanging structure protrudes out of the body portion, and the flanging structure is configured for matching with the plurality of flat tubes. 
     
     
         16 . The micro-channel heat exchanger of  claim 15 , wherein the flanging structure comprises a first flanging, and the first flanging is disposed along a peripheral circumference of corresponding one of the plurality of inserting slots and defines a shape matching with the plurality of flat tubes; and/or,
 the flanging structure comprises a first flanging, a height of the first flanging is defined as H 7 , and the height H 7  of the first flanging satisfies the following formula: 0<H 7 ≤1 mm.   
     
     
         17 . The micro-channel heat exchanger of  claim 16 , wherein the flanging structure further comprises a plurality of second flangings, the plurality of second flangings are disposed on the first flanging at intervals along the peripheral circumference of the insertion slot, and a plane defined by the plurality of second flangings coincides with a plane defined by the first flanging; and/or,
 the flanging structure further comprises a plurality of second flangings, a height of each of the plurality of second flangings is defined as H 8 , and a height of each of the plurality of second flangings is defined as Gt, and the H 8  height of each of the plurality of second flangings and height Gt of each of the plurality of second flangings satisfy the following formula: 0.25<H 8 /Gt<1; and/or,   the flanging structure further comprises a plurality of second flangings, the flanging structure further comprises a plurality of third flangings, the plurality of third flangings are disposed corresponding to the plurality of second flangings, each of the plurality of third flanging is disposed at a side of corresponding one of the plurality of second flangings away from the first flanging, a preset angle is defined between one of the plurality of second flangings and corresponding one of the plurality of third flangings, and the plurality of third flangings are capable of giving way to the plurality of insertion slots.   
     
     
         18 . The micro-channel heat exchanger of  claim 10 , wherein a minimum distance between the plurality of fins and the two connecting sections is defined as C, and the minimum distance C between the plurality of fins and the two connecting sections satisfy the following formula: 0≤C≤80 mm. 
     
     
         19 . The micro-channel heat exchanger of  claim 1 , wherein the plurality of fins are arranged as at least two columns of fins, and each of the at least two columns of fins comprises a plurality of rows of fins disposed at intervals, fins in the same row of the at least two columns of fins are separately disposed, and insertion slots in the same row of the at least two columns of fins are interlaced disposed; and/or,
 insertion slots in the same column of the at least two columns of fins are interlaced disposed.   
     
     
         20 . The micro-channel heat exchanger of  claim 1 , wherein the micro-channel heat exchanger comprises a collecting pipe, the plurality of flat tubes comprises at least a first column of flat tubes and a second column of flat tubes parallel to each other, the first column of flat tubes are connected to and in communication with a corresponding one of the plurality of adapters, the second column of flat tubes are connected to and in communication with the collecting pipe; or, the plurality of flat tubes is arranged in one column, an end of each of the plurality of flat tubes is connected to and in communication with a corresponding one of the plurality of adapters, the other end of each of the plurality of flat tubes is connected to and in communication with the collecting pipe.