Heat exchanger

Abstract

The application provides a heat exchanger, which comprises a first header, a second header, a heat exchange tube and a distribution pipe. The heat exchange tube comprises a first end and a second end. The first end is connected with the first header, and the second end is connected with the second header. The distribution pipe comprises a row of first convex ridges and a row of second convex ridges. First gaps are formed between two adjacent first convex ridges, and second gaps are formed between two adjacent second convex ridges. The heat exchanger has flow channels which are connected with the first gaps and the second gaps. The flow channels are connected with through holes and first cavities. The first gaps and the second gaps are arranged staggeredly. When the refrigerant flows from the first gaps to the first cavities, the advancing direction of the refrigerant is blocked by the second convex ridges, and then the refrigerant flows from the staggered second gaps. The refrigerant disturbance is increased, the gas-liquid mixing degree of the refrigerant is improved, and the refrigerant distribution uniformity in the heat exchanger is good.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and in particular to a refrigerant distribution structure for a heat exchanger. Background Technology

[0002] The heat exchanger of the related technology includes a manifold and a distribution pipe disposed within the manifold. The inner cavity of the distribution pipe is connected to the inner cavity of the manifold. When the heat exchanger is working, refrigerant flows from the inner cavity of the distribution pipe to the inner cavity of the manifold. The distribution pipe includes a row of first ridges and a row of second ridges, with a first gap formed between two adjacent first ridges and a second gap formed between two adjacent second ridges. The first gap and the second gap are aligned, allowing the refrigerant to flow into the inner cavity of the manifold without significant obstruction, resulting in poor uniformity of refrigerant distribution. Summary of the Invention

[0003] This application provides a heat exchanger that improves the uniformity of refrigerant distribution.

[0004] A heat exchanger includes a first manifold, a second manifold, a heat exchange tube, and a distribution tube. The heat exchange tube includes a first end and a second end, the first end being connected to the first manifold, and the second end being connected to the second manifold.

[0005] The distribution pipe is disposed in the inner cavity of the first manifold, the distribution pipe includes a first surface facing the first end, the first manifold includes a first inner wall surface facing the first surface, and the heat exchanger has a first cavity located between the first surface and the first inner wall surface.

[0006] The distribution tube includes a first wall further away from the first end relative to the first surface, the first wall having a through hole extending through the first wall along the wall thickness direction, and the distribution tube having a second cavity, the through hole communicating with the second cavity;

[0007] The first wall includes a row of first protruding ridges and a row of second protruding ridges. A first gap is formed between two adjacent first protruding ridges, and a second gap is formed between two adjacent second protruding ridges. The heat exchanger has a flow channel that connects the first gap and the second gap. The flow channel connects the through hole and the first cavity. The first gap and the second gap are staggered.

[0008] By using a staggered first gap and a staggered second gap, when the heat exchanger is working, the refrigerant flows from the second cavity through the through hole and the flow channel to the first cavity. After the refrigerant is blocked by the second convex ridge in the direction of its advance from the first cavity, it flows through the staggered second gap, which increases the crosstalk of the refrigerant and improves the gas-liquid mixing degree of the refrigerant, thereby improving the uniformity of refrigerant distribution in the heat exchanger. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the heat exchanger in this application;

[0010] Figure 2 This is an exploded schematic diagram of the heat exchanger in this application;

[0011] Figure 3 This is a top view of the heat exchange tubes and fins of this application;

[0012] Figure 4 This is a three-dimensional sectional view of the heat exchanger of this application;

[0013] Figure 5 Is it like this? Figure 4 An enlarged view of circle A on the heat exchanger shown;

[0014] Figure 6 Is it like this? Figure 4 An enlarged view of circle B on the heat exchanger shown.

[0015] Figure 7 This is a partial cross-sectional schematic diagram of the heat exchanger in this application;

[0016] Figure 8 This is a three-dimensional schematic diagram of the distribution pipe of this application;

[0017] Figure 9 This is an exploded schematic diagram of the distribution pipe in this application;

[0018] Figure 10 Is it like this? Figure 9 A three-dimensional schematic diagram of the first pipe fitting shown;

[0019] Figure 11 This is a three-dimensional schematic diagram of the distribution pipe according to another embodiment of this application;

[0020] Figure 12 Is it like this? Figure 11 A three-dimensional schematic diagram of the distribution pipe from another perspective;

[0021] Figure 13 This is a partial cross-sectional schematic diagram of a heat exchanger according to another embodiment of this application; and

[0022] Figure 14 This is a partial cross-sectional schematic diagram of a heat exchanger according to another embodiment of this application. Detailed Implementation

[0023] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1 to 2As shown, this application provides a heat exchanger 100, which includes a first manifold 1, a second manifold 2, a plurality of heat exchange tubes 3, a plurality of fins 4, and a distribution pipe 5. The plurality of heat exchange tubes 3 are connected to the first manifold 1 and the second manifold 2, and the inner cavity of the heat exchange tubes 3 is connected to the inner cavity of the first manifold 1 and the inner cavity of the second manifold 2. The plurality of fins 4 are respectively disposed between two adjacent heat exchange tubes 3, and the distribution pipe 5 is disposed in one of the first manifold 1 and the second manifold 2.

[0025] Each heat exchange tube 3 includes a main body 33, a first end 31, and a second end 32. The first end 31 and the second end 32 are located on different sides of the length of the heat exchange tube 3. The first end 31 is connected to the first manifold 1, and the second end 32 is connected to the second manifold 2. The main body 33 is connected between the first end 31 and the second end 32. The width of the main body 33 is greater than the width of the first end 31, and the width of the main body 33 is greater than the width of the second end 32, so that the first end 31 and the second end 32 form a constricted shape, which facilitates the insertion and installation of the heat exchange tube 3 into the first manifold 1 and the second manifold 2, and also facilitates the control of the insertion depth of the heat exchange tube 3 into the first manifold 1 and the second manifold 2.

[0026] like Figure 3 As shown, the heat exchange tube 3 includes a row of microchannels 34 arranged along its width direction. The heat exchange tube 3 is a microchannel flat tube. The heat exchange tube 3 includes a first plane 35, a second plane 36, a first side surface 37, and a second side surface 38. The first plane 35 and the second plane 36 are located on different sides in the thickness direction of the heat exchange tube 3 and are arranged parallel to each other. The first side surface 37 and the second side surface 38 are located on different sides in the width direction of the heat exchange tube 3. The first side surface 37 connects between the first plane 35 and the second plane 36, and the second side surface 38 connects between the first plane 35 and the second plane 36. Both the first side surface 37 and the second side surface 38 are arc-shaped and protrude away from the first plane 35 and the second plane 36. The outer contour of the heat exchange tube 3, viewed from the front along its length, is approximately racetrack-shaped. The heat exchange tube 3 is a microchannel flat tube, which enhances the heat exchange capacity between the heat exchange tube 3 and the air.

[0027] In the illustrated embodiment, the heat exchanger further includes two side plates 83. Each fin 4 is disposed between two adjacent heat exchange tubes 3, or between the heat exchange tube 3 and the side plate 83. The fin 4 is fixedly connected to the heat exchange tube 3 and the side plate 83, respectively. The side plate 83 includes a plate body 831 and a bent portion 832. The extending direction of the plate body 831 is parallel to the extending direction of the heat exchange tube 3, and the extending direction of the bent portion 832 is perpendicular to the extending direction of the plate body 831. No fluid channels are provided within the side plate 83, and the side plate 83 stabilizes the outermost fin 4.

[0028] like Figure 2 and Figure 3 As shown, the fin 4 can be a corrugated fin 4, which includes multiple crests 41 and multiple troughs 42. The multiple crests 41 are connected to the second plane 36 of a heat exchange tube 3, and the multiple troughs 42 are connected to the first plane 35 of an adjacent heat exchange tube 3. Alternatively, the crests 41 and troughs 42 of the multiple fins are respectively connected between a heat exchange tube 3 and an adjacent side plate 83. In the illustrated embodiment, the fin 4 is not provided with windows, which improves the drainage performance of the fin 4. In an optional embodiment, the fin 4 is provided with several windows to improve the turbulence of the flowing air, thereby improving the heat exchange performance.

[0029] like Figures 2 to 6 As shown, the first manifold 1 has a first cavity / inner cavity 13, and the second manifold 2 has a second cavity 21. The first cavity 13 and the second cavity 21 are fluidly connected through the microchannel 34 of the heat exchange tube 3. The first manifold 1 has a first slot 14, and the first end 31 of the heat exchange tube 3 is inserted into the first slot 14. The first end 31 is fixedly connected to the corresponding slot wall of the first slot 14 and is sealed at the connection. The second manifold 2 has a second slot 22, and the second end 32 of the heat exchange tube 3 is inserted into the second slot 22. The second end 32 is fixedly connected to the corresponding slot wall of the second slot 22 and is sealed at the connection.

[0030] The heat exchanger 100 includes an inlet pipe 81 and an outlet pipe 82. The inlet pipe 81 is connected to one end of the first manifold 1, and the outlet pipe 82 is connected to one end of the second manifold 2. The inlet pipe 81 and the outlet pipe 82 are located on the same side of the heat exchange tube 3 in the width direction of the heat exchanger 100, which facilitates the connection of external pipelines from the same side of the heat exchanger and simplifies the connection process. During use, the refrigerant enters the distribution pipe 5 from the inlet pipe 81, is distributed by the distribution pipe 5, enters the first cavity 13 of the first manifold 1, flows through the microchannel 34 of the heat exchange tube 3 and exchanges heat with the air in the external environment, then enters the second cavity 21 of the second manifold 2, and is finally discharged from the outlet pipe 82.

[0031] like Figure 7 and Figure 13 The diagram shows two different configurations for distribution pipe 5. Figure 7 The distribution pipe 5 is a split-type structure. Figure 13 The distribution pipe 5 is an integral part. The distribution pipe 5 is disposed in the first cavity 13 of the first manifold 1. The distribution pipe 5 includes a first surface 51 facing the first end 31. The first manifold 1 includes a first inner wall surface 11 facing the first surface 51. The heat exchanger 100 has a first cavity 101 located between the first surface 51 and the first inner wall surface 11.

[0032] The distribution pipe 5 includes a first wall 52 located further away from the first end 31 than the first surface 51. The first wall 52 has a through hole 521 extending through the first wall 52 along its thickness direction. The distribution pipe 5 has a second cavity 50 for refrigerant to enter from the inlet pipe 81. The through hole 521 connects to the second cavity 50, allowing refrigerant to flow out of the distribution pipe 5 from the second cavity 50. The distribution pipe 5 includes a second wall 53 connected to the first wall 52, with the lower surface of the second wall 53 being the first surface 51. The first wall 52 is an arcuate wall, and the second wall 53 is a bottom wall connecting to the arcuate wall. The distribution pipe 5 is D-shaped. The distribution pipe has a second cavity 50 formed by the first wall 52 and the second wall 53, with the through hole 521 directly connecting to the second cavity 50.

[0033] like Figure 9 and Figure 10 As shown in the figure, the curved curves and the arrows connecting to the curved curves represent the flow direction of the refrigerant. The first wall 52 includes a row of first protruding ridges 54 and a row of second protruding ridges 55. A first gap 61 is formed between two adjacent first protruding ridges 54, and a second gap 62 is formed between two adjacent second protruding ridges 55. The heat exchanger 100 has a flow channel 65 connecting the first gap 61 and the second gap 62. The flow channel 65 connects the through hole 521 and the first cavity 101. The first gap 61 and the second gap 62 are staggered. The staggered arrangement of the first gap 61 and the second gap 62, because the corresponding second protruding ridges 55 obstruct the circumferential flow direction of the refrigerant around the first wall 52, forces the refrigerant to flow along the axial direction of the distribution pipe 5 before it can pass through the second gap 62. This increases the crosstalk of the refrigerant, improves the gas-liquid mixing degree of the refrigerant, and thus enhances the uniformity of refrigerant distribution.

[0034] The first wall 52 includes a row of third protruding ridges 56, with a third gap 63 formed between two adjacent third protruding ridges 56. The third gap 63 is directly connected to the first cavity 101 and extends along the flow channel 65. The second gap 62 is located between the first gap 61 and the third gap 63, and the third gap 63 and the second gap 62 are staggered. The staggered third gap 63 and the second gap 62, due to the obstruction of the refrigerant flow in the circumferential direction around the first wall 52 by the corresponding third protruding ridges 56, force the refrigerant to flow along the axial direction of the distribution pipe 5 through the channel 65 before passing through the third gap 63, thereby further increasing the crosstalk of the refrigerant, improving the gas-liquid mixing degree of the refrigerant, and thus further enhancing the uniformity of refrigerant distribution.

[0035] The first gap 61 is closer to the through hole 521 than the second gap 62, and the third gap 63 is closer to the first cavity 101 than the second gap 62. A row of first protrusions 54, a row of second protrusions 55, and a row of third protrusions 56 are all distributed along the length of the distribution pipe 5. The row of first gaps 61 and the row of second gaps 62 are staggered, and the row of second gaps 62 and the row of third gaps 63 are also staggered. This arrangement can further improve the gas-liquid mixing degree of the refrigerant and enhance the uniformity of refrigerant distribution.

[0036] Similarly, the first wall 52 may include more rows of protruding ribs and multiple rows of gaps, with adjacent rows of gaps staggered. In particular, the first wall 52 includes a row of fourth protruding ribs 57, which are located away from the through hole 521 and adjacent to the first cavity 101 in the direction of extension of the flow channel 65. A fourth gap 64 is formed between two adjacent fourth protruding ribs 57 for direct communication with the first cavity 101.

[0037] In some embodiments, such as Figure 11 and Figure 12 As shown in the figure, the curved curve and the arrow connecting to the curved curve represent the flow direction of the refrigerant. The distribution pipe 5 has a row of through holes 521 arranged along its length, and these through holes 521 are staggered from a row of first gaps 61. Because the through holes 521 and the first gaps 61 are staggered, when the refrigerant flowing from the through holes 521 flows circumferentially along the first wall 52, it is blocked by the first protruding ridge 54 and needs to flow along the length of the distribution pipe 5, creating crosstalk between the gaseous and liquid refrigerant, thereby enhancing the uniformity of refrigerant distribution.

[0038] In some embodiments, such as Figure 10 As shown, a row of through holes 521 are aligned with the first gap 61 to ensure the flow rate of refrigerant when it flows out of the through holes 521.

[0039] In some embodiments, such as Figures 1 to 10 As shown, the distribution pipe 5 includes a first fitting 71 and a second fitting 72. The first fitting 71 and the second fitting 72 are fixedly connected and sealed at the connection. The first wall 52 is located on the first fitting 71, and the second fitting 72 surrounds the first fitting 71. The fixed connection between the first fitting 71 and the second fitting 72 can be achieved through interference fit or other limiting connections, and then sealed and fixed by welding methods such as brazing or adhesive. The separate first fitting 71 and the second fitting 72 are fixed by assembly, which reduces the processing difficulty of the internal flow channel 65 compared to the integrated design.

[0040] A flow channel 65 is formed between the first wall 52 of the first pipe 71 and the inner wall 721 of the second pipe 72. In some embodiments, the outer wall 723 of the second pipe 72 is fixedly connected to the second inner wall surface 12 of the first manifold 1. In other embodiments, such as Figure 2 As shown, the heat exchanger 100 includes a cover 84, an inlet pipe 81 fixedly connected to the cover 84, and a distribution pipe 5 fixedly connected to the cover 84. The cover 84 is fixed to the axial end of the first manifold 1. The cover 84 axially seals the first cavity 13 of the first manifold 1, and the inlet pipe 81 and the distribution pipe 5 are connected through the cover 84. The distribution pipe 5 is spaced apart from the second inner wall surface 12 of the first manifold 1.

[0041] The flow channel 65 has a plurality of flow openings 651 formed on the first surface 51, wherein the flow openings 651 are directly connected to the first cavity 101. The flow openings 651 are formed by the fourth protrusion 57, the fourth gap 64, and the inner wall 721 of the second pipe 72. In some embodiments, such as Figure 8 and Figure 9 As shown, the second wall 53 has a plurality of serrated portions 531 and a plurality of grooved portions 532, wherein the plurality of serrated portions 531 and the plurality of grooved portions 532 are alternately arranged. The arrangement of the serrated portions 531 and the grooved portions 532 facilitates the distribution of refrigerant within the first cavity 101. In some embodiments, such as Figure 7 As shown, the first surface 51 of the second wall 53 can also be planar, thus making the structure of the second wall 53 simpler and easier to manufacture.

[0042] In some embodiments, such as Figure 9 and Figure 10 As shown, the first wall 52 of the first pipe fitting 71 includes a first base surface 66, and first protrusions 54, second protrusions 55, third protrusions 56, and fourth protrusions 57 all protrude from the first base surface 66 toward the second pipe fitting 72. The first wall 52 also includes a partition wall 67 protruding from the first base surface 66 toward the second pipe fitting 72. The outer surface 68 of the partition wall 67 is sealed to the inner wall surface 722 of the second pipe fitting 72, and the outer surfaces of the first protrusions 54, second protrusions 55, third protrusions 56, and fourth protrusions 57 are also sealed to the inner wall surface 722 of the second pipe fitting 72. The partition wall 67 prevents the refrigerant flowing out of the through hole 521 from flowing out of the distribution pipe 5 in only one direction, thereby reducing the uneven distribution caused by the separation of gaseous and liquid refrigerant when flowing out of the distribution pipe 5 in two directions.

[0043] The partition wall 67 and the first protruding ridge 54 are located on different sides of the through hole 521. The first base surface 66 is arc-shaped. Along the extension direction of the first base surface 66, the perimeter of the partition wall 67 is the same as the perimeter of the first protruding ridge 54. Here, "same" means approximately the same; a machining error of 10% is also within the scope of protection of this application. The strip-shaped partition wall 67 reduces the weight of the first pipe 71, thereby reducing the weight of the distribution pipe 5. Both the first pipe 71 and the second pipe 72 can be made of aluminum, thus resisting refrigerant corrosion and being lightweight. Figure 10 As shown, multiple partition walls 67 can also be set to enhance the connection reliability between the first pipe fitting 71 and the second pipe fitting 72, as well as the sealing reliability between the first pipe fitting 71 and the second pipe fitting 72.

[0044] In some embodiments, such as Figure 11 and Figure 12 As shown, the first wall 52 of the first pipe fitting 71 includes a first base surface 66, and the first protrusion 54, the second protrusion 55, the third protrusion 56, and the fourth protrusion 57 all protrude from the first base surface 66 toward the second pipe fitting 72. The first wall 52 also includes an arcuate wall 69 protruding from the first base surface 66 toward the second pipe fitting 72. The outer surface 68 of the arcuate wall 69 is in contact with the inner wall surface 722 of the second pipe fitting 72, and the outer surfaces of the first protrusion 54, the second protrusion 55, the third protrusion 56, and the fourth protrusion 57 are in contact with the inner wall surface 722 of the second pipe fitting 72.

[0045] The arc-shaped wall 69 and the first protruding ridge 54 are located on different sides of the through hole 521. The arc-shaped wall 69 extends continuously from a position near the through hole 521 to a position near the first cavity 101. The integrally formed arc-shaped wall 69 has a simpler processing procedure and manufacturing process compared to a separately formed partition wall 67 or multiple partition walls 67, resulting in lower manufacturing costs. The first pipe fitting 71 is provided with a limiting groove 711, and the second pipe fitting 72 is provided with a limiting protrusion (not shown). The limiting groove 711 and the limiting protrusion cooperate to limit and connect the first pipe fitting 71 and the second pipe fitting 72.

[0046] In some embodiments, such as Figure 13 As shown, the distribution pipe 5 is a single piece, with its first wall 52 fitting against the second inner wall 12 of the first manifold 1. This means the first manifold 1 directly replaces the function of the second pipe fitting 72 and simultaneously performs the functions of the first manifold 1. This arrangement reduces the material cost, volume, weight, and space occupied by the second pipe fitting 72, resulting in a lower cost, lighter weight, and smaller size for the assembly of the first manifold 1 and the distributor, thus contributing to the overall lightweight development of the heat exchanger 100.

[0047] The distribution pipe 5 includes a first limiting part (not shown), and the first collector pipe 1 includes a second limiting part (not shown). The first limiting part and the second limiting part cooperate to limit and connect the distribution pipe 5 to the first collector pipe 1. The first limiting part and the second limiting part can be one of a convex part and a concave part, respectively, so as to facilitate the installation of the distribution pipe 5 to the first collector pipe 1.

[0048] Figure 13 The integrated distribution pipe 5 in the heat exchanger 100 shown adopts Figure 11 and Figure 12 The distribution pipe 5 shown can, of course, also be used. Figure 10 The structure of distribution pipe 5 is shown. Further details will not be provided here.

[0049] like Figure 14 As shown, in another embodiment of the distribution pipe 5, the first wall 52 is semi-arc-shaped. One end of the first wall 52 is connected to the second wall 53, while the other end is not connected. The horizontal sides of the second wall 53 are fixedly connected to the inner wall of the first manifold 1, and the connection is sealed at the joint. The fixed connection can be achieved by brazing, gluing, or other methods. Preferably, the outer surface of the first wall 52 is brazed to the inner wall of the first manifold 1, and the welded joint is sealed. The semi-arc shape of the first wall 52 reduces the weight of the distribution pipe 5 and increases the refrigerant storage space, which not only facilitates the lightweight design of the heat exchanger 100 but also helps maintain the refrigerant charge within the heat exchanger 100.

[0050] The above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. The understanding of this specification should be based on those skilled in the art. For example, the directional descriptions such as "front", "back", "left", "right", "up", and "down" are important. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. A heat exchanger, characterized in that, It includes a first manifold, a second manifold, a heat exchange tube, and a distribution tube. The heat exchange tube includes a first end and a second end, the first end being connected to the first manifold, and the second end being connected to the second manifold. The distribution pipe is disposed in the inner cavity of the first manifold, the distribution pipe includes a first surface facing the first end, the first manifold includes a first inner wall surface facing the first surface, and the heat exchanger has a first cavity located between the first surface and the first inner wall surface. The distribution tube includes a first wall further away from the first end relative to the first surface, the first wall having a through hole extending through the first wall along the wall thickness direction, and the distribution tube having a second cavity, the through hole communicating with the second cavity; The first wall includes a row of first protruding ridges and a row of second protruding ridges, a first gap is formed between two adjacent first protruding ridges, and a second gap is formed between two adjacent second protruding ridges. The heat exchanger has a flow channel that connects the first gap and the second gap. The flow channel connects the through hole and the first cavity. The first gap and the second gap are staggered. The distribution pipe includes a first pipe fitting and a second pipe fitting, which are fixedly connected and sealed at the connection point. The first wall is located on the first pipe fitting, and the second pipe fitting surrounds the first pipe fitting. The flow channel is formed between the first wall of the first pipe fitting and the inner wall of the second pipe fitting.

2. The heat exchanger according to claim 1, characterized in that, The first wall includes a row of third protruding ridges, and a third gap is formed between two adjacent third protruding ridges. Along the direction of flow channel extension, the second gap is located between the first gap and the third gap, and the third gap is staggered from the second gap.

3. The heat exchanger according to claim 2, characterized in that, The first gap is closer to the through hole than the second gap, and the third gap is closer to the first cavity than the second gap; a row of first protrusions, a row of second protrusions and a row of third protrusions are all distributed along the length direction of the distribution pipe; a row of first gaps and a row of second gaps are staggered, and a row of second gaps and a row of third gaps are staggered.

4. The heat exchanger according to claim 1, characterized in that, The distribution pipe has a row of through holes arranged along the length of the distribution pipe, and the row of through holes is staggered from the row of the first gaps.

5. The heat exchanger according to claim 1, characterized in that, The outer wall of the second pipe fitting is fixedly connected to the second inner wall of the first manifold, or there is a gap between the outer wall of the second pipe fitting and the second inner wall of the first manifold.

6. The heat exchanger according to claim 5, characterized in that, The first wall of the first pipe fitting includes a first base surface, and the first convex ridge and the second convex ridge protrude from the first base surface to the second pipe fitting; the first wall also includes an arcuate wall protruding from the first base surface to the second pipe fitting, the outer surface of the arcuate wall is in contact with the inner wall surface of the second pipe fitting, and the outer surfaces of the first convex ridge and the second convex ridge are in contact with the inner wall surface of the second pipe fitting. The arc-shaped wall and the first protruding ridge are located on different sides of the through hole, and the arc-shaped wall extends continuously from the position near the through hole to the position near the first cavity.

7. The heat exchanger according to claim 5, characterized in that, The first wall of the first pipe includes a first base surface, and the first convex ridge and the second convex ridge protrude from the first base surface to the second pipe; the first wall also includes a partition wall protruding from the first base surface to the second pipe, the outer surface of the partition wall being sealed to the inner wall surface of the second pipe, and the outer surfaces of the first convex ridge and the second convex ridge being sealed to the inner wall surface of the second pipe. The partition wall and the first protruding ridge are located on different sides of the through hole. The first base surface is an arc surface. Along the extension direction of the first base surface, the perimeter of the partition wall is the same as the perimeter of the first protruding ridge.

8. A heat exchanger, characterized in that, It includes a first manifold, a second manifold, a heat exchange tube, and a distribution tube. The heat exchange tube includes a first end and a second end, the first end being connected to the first manifold, and the second end being connected to the second manifold. The distribution pipe is disposed in the inner cavity of the first manifold, the distribution pipe includes a first surface facing the first end, the first manifold includes a first inner wall surface facing the first surface, and the heat exchanger has a first cavity located between the first surface and the first inner wall surface. The distribution tube includes a first wall further away from the first end relative to the first surface, the first wall having a through hole extending through the first wall along the wall thickness direction, and the distribution tube having a second cavity, the through hole communicating with the second cavity; The first wall includes a row of first protruding ridges and a row of second protruding ridges, a first gap is formed between two adjacent first protruding ridges, and a second gap is formed between two adjacent second protruding ridges. The heat exchanger has a flow channel that connects the first gap and the second gap. The flow channel connects the through hole and the first cavity. The first gap and the second gap are staggered. The distribution pipe is a single piece, with its first wall fitting against the second inner wall of the first collector pipe and sealed at the fitting point.

9. The heat exchanger according to claim 8, characterized in that, The distribution pipe includes a first limiting part, and the first collector pipe includes a second limiting part. The first limiting part and the second limiting part cooperate to limit and connect the distribution pipe to the first collector pipe.

10. The heat exchanger according to claim 8, characterized in that, The first wall includes a first base surface, and the first and second protruding ridges protrude from the first base surface to the second pipe fitting; the first wall also includes an arcuate wall protruding from the first base surface to the second inner wall surface, the outer surface of the arcuate wall being sealed to the second inner wall surface of the first manifold, and the outer surfaces of the first and second protruding ridges being sealed to the second inner wall surface of the first manifold. The arc-shaped wall and the first protruding ridge are located on different sides of the through hole, and the arc-shaped wall extends continuously from the position near the through hole to the position near the first cavity.

Images