Heat exchanger and fin thereof

Abstract

The present application relates to a kind of heat exchanger and its fin, the fin includes fin main body, and the fin main body includes first sub-fin part and second sub-fin part;The fin has avoidance gap, and first sub-fin part and second sub-fin part are located on the two sides of avoidance gap respectively;The fin further has at least one reinforcing portion, and the wall forming avoidance gap includes at least part reinforcing portion;Reinforcing portion is between first sub-fin part and second sub-fin part, and one end of reinforcing portion is fixedly connected with first sub-fin part or is integrated structure, and the other end of reinforcing portion is fixedly connected with second sub-fin part or is integrated structure.The reinforcing portion between first sub-fin part and second sub-fin part is set, and the reinforcing portion is fixedly connected with fin main body or integrated structure, and the rigidity and strength of the whole fin can be improved.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and in particular to a heat exchanger for a refrigeration system and its fins. Background Technology

[0002] Plate heat exchangers consist of multiple stacked plates, with inter-plate channels formed between adjacent plates to allow fluid flow. Two fluids can flow on opposite sides of the plates to achieve heat exchange between them. In related technologies, finned structures are often added to plate heat exchangers to improve their heat exchange performance. However, the central area of ​​the finned structure has large clearance gaps, making the fins prone to deformation during manufacturing, assembly, and brazing, which affects the product's yield and reliability. Summary of the Invention

[0003] Therefore, it is necessary to provide a fin with higher strength and rigidity to address the above problems.

[0004] On the one hand, the technical solution adopted by the present invention is as follows:

[0005] A fin includes a fin body, the fin body including a first sub-fin portion and a second sub-fin portion; the fin has an avoidance notch, the first sub-fin portion and the second sub-fin portion are respectively located on both sides of the avoidance notch;

[0006] The fin also has at least one reinforcing portion, and the wall forming the clearance notch includes at least a portion of the reinforcing portion; the reinforcing portion is located between the first sub-fin portion and the second sub-fin portion, and one end of the reinforcing portion is fixedly connected to the first sub-fin portion or is an integral structure therewith, and the other end of the reinforcing portion is fixedly connected to the second sub-fin portion or is an integral structure therewith.

[0007] A reinforcing part is provided between the first sub-fin section and the second sub-fin section of the technical solution of this application. The reinforcing part is fixedly connected to the fin body or is an integral structure, which can improve the overall rigidity and strength of the fin.

[0008] On the other hand, the present invention also adopts the following technical solution:

[0009] A heat exchanger includes an interplate channel and fins, wherein the plates forming the interplate channel include a second partition protruding toward the interplate channel;

[0010] The fin includes a fin body, the fin body includes a first sub-fin portion and a second sub-fin portion; the fin has an avoidance notch, the first sub-fin portion and the second sub-fin portion are located on both sides of the avoidance notch;

[0011] The fin also has at least one reinforcing portion, and the wall forming the clearance notch includes at least a portion of the reinforcing portion; the reinforcing portion is located between the first sub-fin portion and the second sub-fin portion, and one end of the reinforcing portion is fixedly connected to the first sub-fin portion or is an integral structure therewith, and the other end of the reinforcing portion is fixedly connected to the second sub-fin portion or is an integral structure therewith.

[0012] The second partition is embedded in the avoidance gap.

[0013] The technical solution of this application provides a reinforcing part between the first sub-fin part and the second sub-fin part of the fin. The reinforcing part is fixedly connected to the fin body or is an integral structure, which can improve the overall rigidity and strength of the fin. During assembly and brazing processes, the deformation of the fin can be reduced, thereby improving the qualification rate and reliability of the heat exchanger product. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the heat exchanger of the present invention;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure after the first and second plates are assembled and the fins are hidden;

[0016] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0017] Figure 4 for Figure 2 Another structural diagram from a different perspective;

[0018] Figure 5 for Figure 4 A cross-sectional view along the BB direction;

[0019] Figure 6 for Figure 1 A schematic diagram of the structure after the first plate, the second plate, and the fins are assembled.

[0020] Figure 7 for Figure 6 A cross-sectional view along the CC direction;

[0021] Figure 8 for Figure 1 A schematic diagram of the structure of the first embodiment of the fins in the diagram;

[0022] Figure 9 for Figure 6 Another structural diagram from a different perspective;

[0023] Figure 10 for Figure 9 A cross-sectional view along the DD direction;

[0024] Figure 11 This is a schematic diagram of the second embodiment of the fin.

[0025] Figure 12 for Figure 1 The first plate, the second plate, and Figure 11 A cross-sectional view of the assembled fins;

[0026] Figure 13 This is a schematic diagram of the third embodiment of the fin;

[0027] Figure 14 for Figure 1 The first plate and Figure 13 A schematic diagram of the structure after the fins are assembled.

[0028] Figure 15 for Figure 1 The first plate, the second plate, and Figure 13 A cross-sectional view of the three components of the fin after assembly.

[0029] Reference numerals: 1. Heat exchanger; 2. Cover plate; 3. Heat exchange core; 4. Fluid inlet; 5. Fluid outlet; 6. First inter-plate channel; 7. Fin; 8. First plate; 9. Second plate; 10. Second partition; 11. First region; 12. Second region; 13. First flow port; 14. Second flow port; 15. Inlet corner hole; 16. Outlet corner hole; 17. Heat exchange zone; 18. Fin body; 19. First sub-fin section; 20. Second sub-fin section; 21. Third sub-fin section; 22. Clearance notch; 23. Reinforcing section; 24. First end; 25. Second end; 26. Reinforcing fin section; 27. Reinforcing plate section; 28. Flat plate section; 29. ​​First partition section; 30. First inner sidewall; 31. Second inner sidewall; 32. Inlet; 33. First sub-clearance notch; 34. Second sub-clearance notch; 35. First sub-sidewall; 36. Second sub-sidewall; 37. Third sub-sidewall; 38. Fourth sub-sidewall; 39. Outlet. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] This embodiment discloses a heat exchanger 1, such as Figure 1As shown, the device includes a cover plate 2 and a heat exchange core 3. The cover plate 2 has a fluid inlet 4 and a fluid outlet 5. The heat exchange core 3 includes multiple plates, which are stacked alternately to form multiple first inter-plate channels 6 and multiple second inter-plate channels. The first inter-plate channels 6 and the second inter-plate channels are isolated from each other and are arranged alternately. Fluid enters the first inter-plate channels 6 in the heat exchange core 3 through the fluid inlet 4. The fluid in the first inter-plate channels 6 exchanges heat with the fluid in the second inter-plate channels through the plate walls and finally flows out from the fluid outlet 5.

[0032] like Figure 1 , and 9 and Figure 10 As shown, the heat exchanger 1 also includes fins 7. The fins 7 can be disposed only within the first inter-plate channel 6; or, the fins 7 can be disposed only within the second inter-plate channel; of course, fins 7 can be disposed in both the first and second inter-plate channels simultaneously. Taking the first inter-plate channel 6 as an example, fluid flows into the first inter-plate channel 6 through the fluid inlet 4. Since the first inter-plate channel 6 is equipped with fins 7, the fins 7 can turbulentize the fluid, which is beneficial to improving the heat exchange effect of the heat exchanger 1. In addition, the fins 7 can also support the plates, which is beneficial to improving the structural strength of the heat exchanger 1. Specifically, the fins 7 can be fixed between two adjacent plates by brazing.

[0033] For example, such as Figures 2-5 As shown, the plates forming the first inter-plate channel 6 include a first plate 8 and a second plate 9. The first plate 8 has a second partition 10 protruding towards the first inter-plate channel 6. The second partition 10 is fixedly connected to or clearance-fitted with the base plate portion of the second plate 9. The first inter-plate channel 6 has a first region 11 and a second region 12, which are located on both sides of the second partition 10. The first inter-plate channel 6 also has a flow port that connects the first region 11 and the second region 12. The flow port includes a first flow port 13 and a second flow port 14. The first flow port 13 is located at one end of the second partition 10, and the second flow port 14 is located at the other end of the second partition 10. The plates forming the first inter-plate channel 6 also have an inlet corner hole 15 and an outlet corner hole 16. The inlet corner hole 15 is located in the first region 11, and the outlet corner hole 16 is located in the second region 12. Fluid enters the first region 11 through the inlet corner hole 15, then enters the second region 12 through the flow port, and finally flows out through the outlet corner hole 16. From the perspective of fluid distribution, the first interplate channel 6 includes a distribution zone and a heat exchange zone 17. The distribution zone includes a first distribution zone and a second distribution zone, which are located on both sides of the heat exchange zone 17. The heat exchange of the fluid is mainly concentrated in the heat exchange zone 17.

[0034] like Figures 6-8As shown, the fin 7 includes a fin body 18, which includes a first sub-fin portion 19, a second sub-fin portion 20, and a third sub-fin portion 21, all of which are integrally formed by stamping. The fin 7 also has a clearance notch 22, with the first sub-fin portion 19 and the second sub-fin portion 20 located on opposite sides of the clearance notch 22. The fin 7 is assembled into the heat exchanger 1, and the clearance notch 22 serves to avoid the second partition portion 10 of the plate, i.e., the second partition portion 10 is embedded within the clearance notch 22. The fin 7 also has at least one reinforcing portion 23, and the wall forming the clearance notch includes at least a portion of the reinforcing portion 23. The reinforcing portion 23 is located between the first sub-fin portion 19 and the second sub-fin portion 20, and one end of the reinforcing portion 23 is fixedly connected to the first sub-fin portion 19 or is integrally formed therefrom, while the other end of the reinforcing portion 23 is fixedly connected to the second sub-fin portion 20 or is integrally formed therefrom. Thus, a reinforcing portion 23 is provided between the first sub-fin portion 19 and the second sub-fin portion 20. This reinforcing portion 23 is fixedly connected to the fin body 18 or is an integral structure, which can improve the overall rigidity and strength of the fin 7. During manufacturing, assembly, and brazing processes, it can reduce the deformation of the fin 7, thereby improving the product qualification rate and reliability. Specifically, along the length direction of the fin 7, the fin 7 has a first end 24 and a second end 25. The third sub-fin portion 21 is located at the second end 25 of the fin 7, and the reinforcing portion 23 is located at the first end 24 of the fin 7. That is, the reinforcing portion 23 and the third sub-fin portion 21 are arranged opposite to each other.

[0035] There is no specific limit to the number of reinforcement sections 23; there can be one, two, or more. For example, such as... Figures 6-8 As shown, the fin 7 has a reinforcing portion 23, which is located near the edge of the fin 7; or, the fin 7 has at least two reinforcing portions 23, which are spaced apart along the length of the clearance notch 22, and at least one reinforcing portion 23 is located near the edge of the fin 7. The portion of the first sub-fin portion 19 closer to the edge of the fin 7 is more prone to deformation because there is no external force pulling it. By having one or at least two reinforcing portions 23, and at least one reinforcing portion 23 near the edge of the fin 7, the overall rigidity and strength of the fin 7 can be increased, especially the strength of the portion of the fin 7 near the edge, thus reducing the occurrence of fin deformation.

[0036] The specific structure of the reinforcing section 23 can be the same as that of the fin body 18 to increase the heat exchange efficiency of the fluid passing through the reinforcing section 23; of course, the specific structure of the reinforcing section 23 can also be a plate-like structure, which can form a flow port with the plate opposite it, thereby reducing the pressure drop of the fluid passing through the reinforcing section 23 and thus reducing energy consumption. The details are as follows:

[0037] In the first implementation, such as Figures 8-10As shown, the reinforcing part 23 is a reinforcing fin part 26, which is an integral structure with the fin body 18, meaning that the structure of the reinforcing fin part 26 is the same as that of the fin body 18. For example, the reinforcing fin part 26 and the fin body 18 can be formed into an integral structure by stamping. Thus, the structure and processing steps of the integrally formed fin 7 are relatively simple. Furthermore, when this fin 7 is assembled into the heat exchanger 1, it increases the turbulence of the fluid at the reinforcing fin part 26, thereby improving the heat exchange efficiency of the fluid passing through the reinforcing part 23.

[0038] In the second implementation, such as Figures 11-12 As shown, the reinforcing part 23 is a reinforcing plate part 27, which is an integral structure with the fin body 18. That is, the structure of the reinforcing plate part 27 is different from that of the fin body 18, and the reinforcing plate part 27 is a plate-shaped structure. For example, the reinforcing plate part 27 is a flat plate structure. The reinforcing plate part 27 and the fin body 18 can be formed into an integral structure by stamping. In this way, the structure and processing steps of the integral fin 7 are relatively simple. In addition, when the fin 7 is assembled into the heat exchanger 1, the reinforcing plate part 27 can form a flow port with the adjacent plate, which can reduce the pressure drop of the fluid passing through the reinforcing plate part 27, thereby reducing energy consumption.

[0039] In the third embodiment, the main difference from the second embodiment is that: Figures 13-14 As shown, the reinforcing plate portion 27 has a first partition portion 29 protruding in the thickness direction Z toward the fin body 18, wherein the direction perpendicular to the plate surface is the thickness direction Z of the fin body 18; more specifically, the reinforcing plate portion 27 includes a flat plate portion 28, and the reinforcing plate portion 27 also has a first partition portion 29 protruding relative to the flat plate portion 28; the fin 7 is assembled into the heat exchanger 1, and the first partition portion 29 can be fixedly connected or clearance-fitted with the plate forming the first inter-plate channel 6; thus, the first partition portion 29 can prevent fluid from flowing through the reinforcing plate portion 27 into the second region 12. Furthermore, the first partition portion 29 and the second partition portion 10 are clearance-fitted, preventing fluid from flowing from the first end 24 of the fin 7 to the second region 12, causing more fluid to flow through the heat exchange zone 17 and from the second end 25 of the fin 7 to the second region 12, so that the fluid achieves efficient heat exchange in the heat exchange zone 17, thereby improving the heat exchange efficiency of the heat exchanger 1.

[0040] like Figure 8As shown, the reinforcing part 23 has a first inner sidewall 30, and the first inner sidewall 30 is arc-shaped. Thus, the arc-shaped structure of the fin 7 at the fluid bend improves the flow field uniformity at the point where the fluid flows over the first inner sidewall 30. Furthermore, the third sub-fin part 21 connects the first sub-fin part 19 and the second sub-fin part 20; the third sub-fin part 21 has a second inner sidewall 31, which is opposite to the first inner sidewall 30 and is arc-shaped. Thus, the arc-shaped structure of the fin 7 at the fluid bend improves the flow field uniformity at the point where the fluid flows over the second inner sidewall 31.

[0041] like Figure 8 As shown, along the extension direction X of the clearance notch 22, the extension length of the reinforcing part 23 is T1, and the extension length of the third sub-fin part 21 is T2. T1 and T2 satisfy the following relationship: 6T1≤T2≤13T1. In this way, on the one hand, the reinforcing part 23 can be adapted to the extension length of the first flow port 13 and the third sub-fin part 21 can be adapted to the extension length of the second flow port 14, which facilitates the assembly of the fin 7; on the other hand, the larger extension length of the third sub-fin part 21 can ensure that the fin body 18 has a certain strength and rigidity.

[0042] like Figure 8 As shown, fin 7 has an inlet 32; the clearance notch 22 includes a first sub-clearance notch 33 and a second sub-clearance notch 34. The first sub-clearance notch 33 is closer to the inlet 32 ​​than the second sub-clearance notch 34, and the flow cross-sectional area of ​​the first sub-clearance notch 33 is smaller than that of the second sub-clearance notch 34. Thus, the flow cross-sectional area of ​​the second sub-clearance notch 34 is larger than that of the first sub-clearance notch 22, allowing more fluid to bypass through the second sub-clearance notch 34, which can adapt to operating conditions with low heat exchange requirements.

[0043] like Figure 7 and Figure 8As shown, the direction perpendicular to the extension direction of the clearance gap 22 is defined as the first direction; the wall forming the first sub-clearance gap 33 includes a first sub-sidewall 35 and a second sub-sidewall 36, and the distance between the first sub-sidewall 35 and the second sub-sidewall 36 along the first direction is L1; the wall forming the second sub-clearance gap 34 includes a third sub-sidewall 37 and a fourth sub-sidewall 38, and the distance between the third sub-sidewall 37 and the fourth sub-sidewall 38 along the first direction is L2; ​​L1 and L2 satisfy the following relationship: L1 < L2. Thus, the larger the distance between the two sub-sidewalls, the larger the flow cross-sectional area of ​​the corresponding clearance gap 22. The distance L1 between the first sub-sidewall 35 and the second sub-sidewall 36 is smaller than the distance L2 between the third sub-sidewall 37 and the fourth sub-sidewall 38. The flow cross-sectional area of ​​the first sub-clearance gap 33 is smaller than the flow cross-sectional area of ​​the second sub-clearance gap 34, which allows more fluid to bypass from the second sub-clearance gap 34, reducing heat exchange requirements. Specifically, in heat exchanger 1, the distance from the first sub-sidewall 35 to the second partition 10 is M1, the distance from the second sub-sidewall 36 to the second partition 10 is M2, the distance from the third sub-sidewall 37 to the second partition 10 is M3, and the distance from the fourth sub-sidewall 38 to the second partition 10 is M4; M1, M2, M3 and M4 satisfy the following relationship: (M1+M2)<(M3+M4).

[0044] like Figures 6-8 As shown, fin 7 also has an outlet 39; along the first direction Y, the wall forming the first sub-avoidance notch 33 also includes at least a portion of the first inner wall 30, and the inlet 32, outlet 39, and first inner wall 30 are located on the same side of fin 7. When fin 7 is assembled into heat exchanger 1, since the inlet 32, outlet 39, and first inner wall 30 are located on the same side of fin 7, after the fluid enters the first region 11 from the inlet 32, part of it flows through the heat exchange zone 17 to the second end 25 of fin 7, then enters the second region 12 from the second end 25 of fin 7, and again flows through the heat exchange zone 17 to the first end of fin, and finally flows out from the outlet. The fluid can achieve efficient heat exchange in the heat exchange zone 17.

[0045] In heat exchanger 1, such as Figure 1 , Figure 6 , Figure 7 and Figure 8As shown, the plate forming the inter-plate channel includes a second partition 10 protruding towards the inter-plate channel; the fin 7 includes a fin body 18, the fin body 18 includes a first sub-fin portion 19 and a second sub-fin portion 20; the fin 7 has a clearance notch 22, the first sub-fin portion 19 and the second sub-fin portion 20 are located on both sides of the clearance notch 22; the fin 7 also has at least one reinforcing portion 23, the reinforcing portion 23 is located between the first sub-fin portion 19 and the second sub-fin portion 20, and one end of the reinforcing portion 23 is fixedly connected to the first sub-fin portion 19 or is an integral structure, and the other end of the reinforcing portion 23 is fixedly connected to the second sub-fin portion 20 or is an integral structure; the second partition 10 is embedded in the clearance notch 22. Thus, a reinforcing part 23 is provided between the first sub-fin section 19 and the second sub-fin section 20. The reinforcing part 23 is fixedly connected to the fin body 18 or is an integral structure, which can improve the rigidity and strength of the overall fin 7. During assembly and brazing processes, the deformation of the fin 7 can be reduced, thereby improving the pass rate and reliability of the heat exchanger 1 product.

[0046] like Figures 13-15 As shown, along the extension direction X of the clearance notch 22, the reinforcing portion 23 and the second partition portion 10 are fixedly connected or spaced apart; wherein, the fixed connection includes welding. Thus, the fixed connection between the reinforcing portion 23 and the second partition portion 10 can reduce deformation of the reinforcing portion 23. Further, the reinforcing portion 23 has a first partition portion 29 protruding towards the inter-plate channel; along the extension direction X of the clearance notch 22, the first partition portion 29 and the second partition portion 10 are sealed by welding or spaced apart; along the thickness direction Z of the fin body 18, one side of the first partition portion 29 is fixedly connected or clearance-fitted with one of the plates forming the inter-plate channel, and the other side of the first partition portion 29 is fixedly connected or clearance-fitted with the other plate forming the inter-plate channel. Thus, the first partition portion 29 can reduce the flow of fluid from the first flow port 13 into the second region 12, allowing more fluid to flow through the heat exchange zone 17 towards the second flow port 14, and then re-enter the second region 12 from the second flow port 14. The fluid achieves efficient heat exchange in the heat exchange zone 17, thereby improving the heat exchange efficiency of the heat exchanger 1.

[0047] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications without departing from the inventive concept, and these modifications all fall within the protection scope of this invention.

Claims

1. A fin, characterized in that, The fin body (18) includes a first sub-fin portion (19) and a second sub-fin portion (20); the fin (7) has a clearance notch (22), and the first sub-fin portion (19) and the second sub-fin portion (20) are located on both sides of the clearance notch (22); The fin (7) also has at least one reinforcing part (23), and the wall forming the clearance notch (22) includes at least a portion of the reinforcing part (23); the reinforcing part (23) is located between the first sub-fin part (19) and the second sub-fin part (20), and one end of the reinforcing part (23) is fixedly connected to the first sub-fin part (19) or is an integral structure thereon, and the other end of the reinforcing part (23) is fixedly connected to the second sub-fin part (20) or is an integral structure thereon.

2. The fin according to claim 1, characterized in that, The fin (7) has a reinforcing portion (23) and the reinforcing portion (23) is close to the edge of the fin (7); or, the fin (7) has at least two reinforcing portions (23) arranged at intervals along the extension direction X of the clearance notch (22) and at least one reinforcing portion (23) is close to the edge of the fin (7).

3. The fin according to claim 1 or 2, characterized in that, The reinforcing part (23) is a reinforcing fin part (26), and the reinforcing fin part (26) and the fin body (18) are an integral structure.

4. The fin according to claim 1 or 2, characterized in that, The reinforcing part (23) is a reinforcing plate part (27), and the reinforcing plate part (27) and the fin body (18) are an integral structure.

5. The fin according to claim 4, characterized in that, The reinforcing plate portion (27) has a first partition portion (29) that protrudes in the thickness direction Z toward the fin body (18).

6. The fin according to any one of claims 1 to 5, characterized in that, The reinforcing part (23) has a first inner sidewall (30), and the first inner sidewall (30) is arc-shaped.

7. The fin according to claim 6, characterized in that, The fin (7) further includes a third sub-fin portion (21), which connects the first sub-fin portion (19) and the second sub-fin portion (20); the third sub-fin portion (21) has a second inner sidewall (31), which is disposed opposite to the first inner sidewall (30), and the second inner sidewall (31) is arc-shaped.

8. The fin according to claim 7, characterized in that, Along the extension direction X of the clearance notch (22), the extension length of the reinforcing part (23) is T1, and the extension length of the third sub-fin part (21) is T2. T1 and T2 satisfy the following relationship: 6T1≤T2≤13T1.

9. The fin according to claims 1 to 8, characterized in that, The fin (7) has an inlet (32); the clearance gap (22) includes a first sub-clearance gap (33) and a second sub-clearance gap (34), the first sub-clearance gap (33) being closer to the inlet (32) than the second sub-clearance gap (34), and the flow cross-sectional area of ​​the first sub-clearance gap (33) being smaller than the flow cross-sectional area of ​​the second sub-clearance gap (34).

10. The fin according to claim 9, characterized in that, The direction perpendicular to the extension direction X of the avoidance gap (22) is defined as the first direction Y; the wall forming the first sub-avoidance gap (33) includes a first sub-side wall (35) and a second sub-side wall (36), and the distance between the first sub-side wall (35) and the second sub-side wall (36) along the first direction Y is L1; the wall forming the second sub-avoidance gap (34) includes a third sub-side wall (37) and a fourth sub-side wall (38), and the distance between the third sub-side wall (37) and the fourth sub-side wall (38) along the first direction Y is L2; ​​L1 and L2 satisfy the following relationship: L1 < L2.

11. The fin according to claim 9 or 10, characterized in that, The fin (7) also has an outlet (39); along the first direction Y, the wall forming the first sub-avoidance notch (33) also includes at least a portion of the first inner wall (30), and the inlet (32), the outlet (39) and the first inner wall (30) are located on the same side of the fin (7).

12. A heat exchanger, characterized in that, Includes an interplate channel and fins (7), wherein the plate forming the interplate channel includes a second partition (10) protruding toward the interplate channel; The fin (7) includes a fin body (18), the fin body (18) includes a first sub-fin portion (19) and a second sub-fin portion (20); the fin (7) has a clearance notch (22), the first sub-fin portion (19) and the second sub-fin portion (20) are located on both sides of the clearance notch (22); The fin (7) also has at least one reinforcing part (23), and the wall forming the clearance notch (22) includes at least a portion of the reinforcing part (23). The reinforcing part (23) is located between the first sub-fin portion (19) and the second sub-fin portion (20), and one end of the reinforcing part (23) is fixedly connected to the first sub-fin portion (19) or is an integral structure thereon, and the other end of the reinforcing part (23) is fixedly connected to the second sub-fin portion (20) or is an integral structure thereon. The second partition (10) is embedded in the avoidance notch (22).

13. The heat exchanger according to claim 12, characterized in that, Along the extension direction X of the avoidance gap (22), the reinforcing part (23) and the second partition part (10) are fixedly connected or spaced apart.

14. The heat exchanger according to claim 12 or 13, characterized in that, The reinforcing part (23) has a first partition (29) protruding toward the inter-plate channel; along the extension direction X of the clearance notch (22), the first partition (29) and the second partition (10) are sealed by welding or spaced apart; along the thickness direction Z of the fin body (18), one side of the first partition (29) is fixedly connected or clearance-fitted with one of the plates forming the inter-plate channel, and the other side of the first partition (29) is fixedly connected or clearance-fitted with another plate forming the inter-plate channel.

15. The heat exchanger according to claim 14, characterized in that, The fin (7) has an inlet (32); the clearance notch (22) includes a first sub-clearance notch (33) and a second sub-clearance notch (34), the first sub-clearance notch (33) being closer to the inlet (32) than the second sub-clearance notch (34); The direction perpendicular to the extension direction X of the avoidance gap (22) is defined as the first direction Y; the wall forming the first sub-avoidance gap (33) includes a first sub-side wall (35) and a second sub-side wall (36), and along the first direction Y, the distance from the first sub-side wall (35) to the second partition (10) is M1, and the distance from the second sub-side wall (36) to the second partition (10) is M2; The wall forming the second sub-avoidance gap (34) includes a third sub-side wall (37) and a fourth sub-side wall (38). The distance from the third sub-side wall (37) to the second partition (10) is M3, and the distance from the fourth sub-side wall (38) to the second partition (10) is M4. M1, M2, M3 and M4 satisfy the following relationship: (M1+M2)<(M3+M4).

Images