Heat exchanger processing device and processing method thereof

Abstract

The present application discloses a heat exchanger processing device and a processing method thereof, comprising a first mold core and a second mold core, the first mold core comprising a first base surface and a first convex portion and a second convex portion protruding relative to the first base surface, the second mold core comprising a second base surface and a first concave portion and a second concave portion recessed relative to the second base surface, wherein the height of the first convex portion relative to the first base surface is defined as H1, the maximum width of the projection of the first convex portion on the plane where the first base surface is located is defined as w1, the height of the second convex portion relative to the first base surface is defined as H2, the maximum width of the projection of the second convex portion on the plane where the first base surface is located is defined as w2, wherein H1 / w1<H2 / w2, and H1>H2, so that the surfaces of the first mold core and the second mold core are as closely fitted as possible to the surfaces of the processed heat exchange plates, thereby reducing the difference between the finally formed heat exchange plates and the heat exchange plates to be formed, and meeting the heat exchange requirements of the heat exchanger.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a heat exchanger processing device and a heat exchanger processing method. Background Art

[0002] The heat exchanger in the related art includes multiple stacked heat exchange plates with protrusions to increase the contact area between the plates and the heat exchange fluid and to disturb the heat exchange fluid to improve heat exchange performance. For compact plate heat exchangers, especially for applications such as automotive and high-efficiency refrigeration equipment, the flow channel size of the heat exchanger is significantly reduced, from the traditional 3-5mm hydraulic diameter to a hydraulic diameter level of less than 3mm, or even less than 2mm. In such scenarios, higher requirements are placed on the manufacturing precision of the heat exchange plates. In particular, the plate mold and stamping technology, brazing technology, etc., are significantly more technically difficult than related applications in traditional industries. Heat exchange plates are usually manufactured using full-profile mold technology. The mold is completely shaped according to the structure of the heat exchange plate, that is, the shape of the mold core is completely consistent with the structure of the heat exchange plate. However, during the processing, the shape of the mold core is usually not in full contact with the surface of the heat exchange plate, resulting in a difference between the structure of the final heat exchange plate and the structure of the heat exchange plate to be formed. In particular, the height of some protrusions or the depth of some grooves on the heat exchange plate are insufficient, affecting the heat exchange performance. Summary of the Invention

[0003] The purpose of this application is to provide a heat exchanger processing device and a processing method thereof, which can reduce the difference between the final formed heat exchange plate and the heat exchange plate to be formed by adjusting the heat exchanger processing device, thereby meeting the heat exchange requirements of the heat exchanger.

[0004] One aspect of an embodiment of the present application provides a processing device for a heat exchanger, including a first mold core and a second mold core, the first mold core including a first base surface, the first mold core being provided with a plurality of first convex portions and a plurality of second convex portions protruding relative to the first base surface, the second mold core including a second base surface, the second mold core being provided with a plurality of first concave portions and a plurality of second concave portions concave relative to the second base surface, the first convex portions being arranged corresponding to the first concave portions, the second convex portions being arranged corresponding to the second concave portions, the height of the first convex portion relative to the first base surface being defined as H1, the maximum width of the projection of the first convex portion on the plane where the first base surface is located being defined as w1, the height of the second convex portion relative to the first base surface being defined as H2, and the maximum width of the projection of the second convex portion on the plane where the first base surface is located being defined as w2, wherein H1 / w1<H2 / w2, and H1>H2.

[0005] An embodiment of the present application provides a processing device for a heat exchanger, wherein the height H1 of the first protrusion relative to the first base surface, the height H2 of the second protrusion relative to the first base surface, the maximum width w1 of the projection of the first protrusion on the plane where the first base surface is located and the maximum width w2 of the projection of the second protrusion on the plane where the second base surface is located satisfy H1 / w1<H2 / w2. Since the first protrusion has a larger height or smaller width relative to the second protrusion, during the processing, when the first protrusion acts on the heat exchange plate to be processed, the deformation of the corresponding area of ​​the heat exchange plate is large, the thickness of the top of the first protrusion formed by the processing of the heat exchange plate is thinned, and the top of the first protrusion cannot be completely fitted with the surface of the mold core. If the first protrusion is relatively The height of the first base surface is exactly the height of the corresponding first protrusion on the heat exchange plate to be formed. The heat exchange plate processed and formed has insufficient height of the first protrusion or insufficient depth of the first groove on the back of the first protrusion due to material thinning, which affects the heat exchange performance. The height of the first protrusion relative to the first base surface is greater than the height of the second protrusion relative to the first base surface, that is, the height of the first protrusion of the heat exchange plate is increased by increasing the height of the first protrusion, so that the surfaces of the first mold core and the second mold core are as close as possible to the surface of the processed heat exchange plate, reducing the difference between the finally formed heat exchange plate and the heat exchange plate to be formed, and meeting the heat exchange requirements of the heat exchanger.

[0006] Another aspect of an embodiment of the present application provides a method for processing a heat exchanger, including a heat exchange plate and a processing device for the heat exchanger, wherein the heat exchange plate has a first side surface and a second side surface, and the processing method includes:

[0007] a. placing the heat exchange plate between the first mold core and the second mold core, with the first side facing the first mold core and the second side facing the second mold core;

[0008] b. Move the first mold core and / or the second mold core, and close the mold together with the second mold core. During the closing process, the first convex portion pushes a portion of the heat exchange plate toward the first concave portion to form a first groove, and a first convex portion is formed on the back side of the first groove. The second convex portion pushes a portion of the heat exchange plate toward the second concave portion to form a second groove, and a second convex portion is formed on the back side of the second groove. The distance between the second convex portion and the second concave portion is greater than the distance between the first convex portion and the first concave portion.

[0009] The processing method of the heat exchanger provided in the embodiment of the present application moves the first mold core and / or the second mold core to process the heat exchange plate located between the first mold core and the second mold core, and acts on the corresponding area of ​​the heat exchange plate through the first protrusion and the second protrusion of the first mold core. Since the first protrusion has a larger height and a smaller width, during the processing, the thickness of the top of the first protrusion formed by the processing of the heat exchange plate is thinner than the thickness of the top of the second protrusion, resulting in insufficient height of the first protrusion. By making the height of the first protrusion relative to the first base surface of the first mold core greater than the height of the second protrusion relative to the first base surface of the first mold core, that is, the height of the first protrusion is greater than the height of the first protrusion of the heat exchange plate finally formed by the first protrusion, the material thinning of the top of the first protrusion during the forming process of the heat exchange plate is compensated by the height of the first protrusion of the first mold core, thereby reducing the difference between the finally formed heat exchange plate and the heat exchange plate to be formed, thereby meeting the heat exchange requirements of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of a three-dimensional structure of the heat exchanger of the present application;

[0011] Figure 2 This is a structural diagram of the heat exchange plate of this application;

[0012] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure at B in the middle;

[0013] Figure 4 yes Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0014] Figure 5 yes Figure 2 Schematic diagram of the cross-sectional structure in the AA direction;

[0015] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure at D in the middle;

[0016] Figure 7 yes Figure 6 Schematic diagram of the local structure;

[0017] Figure 8 This is another structural diagram of the heat exchange half-piece of the present application;

[0018] Figure 9 yes Figure 8 Schematic diagram of the enlarged structure at E in the middle;

[0019] Figure 10 yes Figure 8 Schematic diagram of the enlarged structure at F in the middle;

[0020] Figure 11This is another cross-sectional structural diagram of the heat exchange half plate of the present application;

[0021] Figure 12 yes Figure 11 Schematic diagram of the enlarged structure at G in the middle;

[0022] Figure 13 yes Figure 12 Schematic diagram of the local structure;

[0023] Figure 14 This is another partial structural diagram of the heat exchange plate of this application;

[0024] Figure 15 This is a reference diagram for the distribution of the heat exchange area and corner hole area of ​​the heat exchange plate of this application;

[0025] Figure 16 This is another partial structural diagram of the heat exchange plate of this application;

[0026] Figure 17 It is a schematic diagram of the three-dimensional structure of the first mold core in the processing device of the present application;

[0027] Figure 18 yes Figure 17 Schematic diagram of the enlarged structure at H in the middle;

[0028] Figure 19 yes Figure 17 Schematic diagram of the enlarged structure at I in the middle;

[0029] Figure 20 It is a structural schematic diagram of the second mold core in the processing device of this application;

[0030] Figure 21 yes Figure 20 Schematic diagram of the enlarged structure at J in the middle;

[0031] Figure 22 yes Figure 20 Schematic diagram of the enlarged structure at K in the middle;

[0032] Figure 23 This is another schematic diagram of the three-dimensional structure of the first mold core in the processing device of the present application;

[0033] Figure 24 yes Figure 23 Schematic diagram of the enlarged structure at L in the middle;

[0034] Figure 25 yes Figure 23 Schematic diagram of the enlarged structure at M in the middle;

[0035] Figure 26 This is a schematic diagram of the processing structure of the heat exchange plate before improvement;

[0036] Figure 27This is a schematic diagram of the processing structure of the improved heat exchange plate;

[0037] Figure 28 This is another schematic diagram of the processing structure of the improved heat exchange plate;

[0038] Figure 29 Reference diagram for the distribution of the heat exchange area and corner hole area of ​​the first mold core in the processing device of this application. DETAILED DESCRIPTION

[0039] See also Figure 1-16 , an embodiment of the present application provides a heat exchanger 1, comprising a plurality of heat exchange plates 10 stacked, a fluid channel is provided between adjacent heat exchange plates 10, and other components such as fins can be provided in the fluid channel, the heat exchanger 1 is further provided with a pipe 20 communicating with the fluid channel, the heat exchange plate 10 comprises a base plate 11, a first protrusion 12, a direction perpendicular to the base plate 11 is a first direction, and the first direction is Figure 1 、 Figure 5 、 Figure 8 In the direction N, the first protrusion 12 protrudes toward the direction N, the substrate 11 includes a first side surface 111 close to the first protrusion 12 and a second side surface 112 away from the first protrusion 12, and a first groove 14 is formed on the back of the first protrusion 12. The maximum width of the orthographic projection of the first groove 14 on the plane where the second side surface 112 of the substrate 11 is located is λ1, and the depth of the first groove 14 relative to the second side surface 112 of the substrate 11 is Dp1, wherein 2.5≤Dp1 / λ1≤5, and the height of the first protrusion 12 relative to the first side surface 111 of the substrate 11 is less than the depth of the first groove 14 relative to the second side surface 112 of the substrate 11. Since the first protrusion 12 has sufficient depth and small width, during the processing, when the mold core acts on the heat exchange plate 10, the corresponding area of ​​the heat exchange plate 10 is greatly deformed, and the first protrusion 12 formed by the processing of the heat exchange plate 10 The thickness of the top of a protrusion 12 is thinned, and the top of the first protrusion 12 cannot be completely fitted with the surface of the mold core. If the shape of the mold core completely adopts a structural shape consistent with the heat exchange plate 10, the heat exchange plate 10 processed and formed will have insufficient height of the first protrusion 12 on the processed and formed heat exchange plate 10 or insufficient depth of the first groove 14 on the back of the first protrusion 12 due to the thinning of the material, which affects the heat exchange performance. By changing the structure of the heat exchange plate, the depth of the first groove 14 of the heat exchange plate relative to the second side 112 of the substrate 11 is pre-designed to be greater than the height of the first protrusion 12 relative to the first side 111 of the substrate 11, so that the material thinning at the top of the first protrusion 12 is compensated by the depth of the first groove 14, thereby reducing the difference between the finally formed heat exchange plate 10 and the heat exchange plate 10 to be formed, and meeting the heat exchange requirements of the heat exchanger 1.

[0040] In order to improve the heat exchange performance and strength requirements of the heat exchange plate, the heat exchange plate is usually provided with protrusions of two or more different structures. In some embodiments, the heat exchange plate 10 is further provided with a second protrusion 13. The first protrusion 12 and the second protrusion 13 protrude in the same direction, both protruding in the first direction N. A second groove 15 is formed on the back of the second protrusion 13. The maximum width of the orthographic projection of the second groove 15 on the plane where the second side surface 112 of the substrate 11 is located is λ2, and the depth of the second groove 15 relative to the second side surface 112 of the substrate 11 is Dp2, wherein λ1 / DP1<λ2 / DP2, and DP1>DP2.

[0041] When the heat exchange plate 10 has two or more different protrusions, that is, the heat exchange plate 10 has at least a first protrusion 12 and a second protrusion 13, and the first protrusion 12 and the second protrusion 13 satisfy λ1 / DP1<λ2 / DP2, at this time, the maximum width of the orthographic projection of the first groove 14 on the back of the first protrusion 12 on the plane where the second side surface 112 of the substrate 11 is located is smaller than the maximum width of the orthographic projection of the second groove 15 on the back of the second protrusion 13 on the plane where the second side surface 112 of the substrate 11 is located, or the depth of the first groove 14 relative to the second side surface 112 of the substrate 11 is greater than the depth of the second groove 15 relative to the second side surface 112 of the substrate 11, the deformation of the heat exchange plate 10 in the area where the first protrusion 12 is located is greater than the deformation of the heat exchange plate 10 in the area where the second protrusion 13 is located, which is easy to cause The material thinning at the top of the first protrusion 12 is greater than that at the top of the second protrusion 13, that is, the thickness of the top of the first protrusion 12 is less than the thickness of the top of the second protrusion 13, which easily causes the top of the first protrusion 12 to be lower than the top of the second protrusion 13. By increasing the depth Dp1 of the first groove 14, that is, the depth DP1 of the first groove 14 is greater than the depth DP2 of the second groove 15, the thickness of the first groove 14 compensates for the thinning at the top of the first protrusion 12, reducing the height difference between the top of the first protrusion 12 and the top of the second protrusion 13, thereby reducing the risk of cold welding in the heat exchanger 1. In addition, this parameter relationship between the first protrusion 12 and the second protrusion 13 gives the heat exchanger 1 superior heat exchange performance, but in manufacturing, it is also necessary to combine the structural molding characteristics of the heat exchange plate 10 with the design, converting the differences in material molding into a heat exchange plate 10 structure that is beneficial to heat exchange performance, while also conforming to the heat exchange requirements and manufacturing characteristics of the heat exchanger 1.

[0042] The base plate refers to the portion of the heat exchange plate without protrusions or grooves, which can be the flat portion around the corner holes of the heat exchange plate, or the flat portion between adjacent protrusions or grooves.

[0043] In some embodiments, as Figure 2-15As shown, the first protrusion 12 is located in the middle of the length direction of the heat exchange plate 10, and the second protrusion 13 is close to the end of the length direction of the heat exchange plate 10. Specifically, the heat exchange plate 10 includes a first corner hole area 40, a second corner hole area 50 and a heat exchange area 60. Along the length direction of the heat exchange plate 10, the heat exchange plate 10 includes a first end and a second end. The first corner hole area 40 is close to the first end of the heat exchange plate 10, the second corner hole area 50 is close to the second end of the heat exchange plate 10, and the heat exchange area 60 is located between the first corner hole area 40 and the second corner hole area 50. Among them, the first protrusion 12 is provided in the heat exchange area 60, and the second protrusion 13 is provided in the first corner hole area 40 and / or the second corner hole area 50. The first protrusion 12 is provided in the heat exchange area 60. Due to λ1 / DP1<λ2 / DP2, and DP1>DP2. Through the superior material stretching and forming design, more heat exchange area and more delicate heat exchange space and protrusion structure are provided, giving priority to ensuring the heat exchange performance of the heat exchange zone 60. On the other hand, the second protrusion 13 is arranged in the first corner hole area 40 and / or the second corner hole area 50 to meet the distribution of fluid in the first corner hole area 40 and the second corner hole area 50, and ensure the wall thickness of the fluid channel in this area and the strength of the post-weld structure.

[0044] In some specific embodiments, Figure 8 、 Figure 15 As shown, the first corner hole area 40 and the second corner hole area 50 are provided with a plurality of corner holes 30, wherein, along the width direction of the heat exchange plate 10, the first corner hole area 40 is provided with a first corner hole 31 and a second corner hole 32, and the second corner hole area 50 is provided with a third corner hole 33 and a fourth corner hole 34, wherein the first corner hole 31 and the third corner hole 33 are located on the same side of the heat exchange plate 10, and the second corner hole 32 and the fourth corner hole 34 are located on the other side of the heat exchange plate 10, and a second protrusion 13 is provided between the first corner hole 31 and the second corner hole 32, and a second protrusion 13 is provided between the third corner hole 33 and the fourth corner hole 34, wherein the second protrusion 13 can be provided only in one of the corner hole areas, or the second protrusion can be provided in both corner hole areas. In addition, as Figure 2 、 Figure 8 As shown, a first guide area 70 can be set between the first corner hole area 40 and the heat exchange area 60, and a second guide area 80 can be set between the second corner hole area 50 and the heat exchange area 60. The second protrusion 13 is provided in the first guide area 70 and / or the second guide area 80 to ensure the distribution of the fluid. Of course, the heat exchange plate 10 may also not be provided with a guide area, and the second protrusion 13 may be located only in the corner hole area.

[0045] like Figure 8As shown, the heat exchange plate 10 is further provided with a plurality of protrusions 19 protruding toward the first direction, and the protrusions 19 are arranged around the edges of the first corner hole 31 and the third corner hole 33, and the first corner hole 31 and the third corner hole 33 are located at the top of the protrusion 19. In addition, the protrusions can also be arranged at other positions, for example, the protrusion 19 is located at the outer periphery of the second corner hole 32 and the fourth corner hole 34, and there is a predetermined distance between the protrusion 19 and the second corner hole 32 and the fourth corner hole 34, respectively. The back side of the protrusion top of the first protrusion 12 has a first flat portion 141, the back side of the protrusion top of the second protrusion 13 has a second flat portion 151, and the back side of the top of the protrusion 19 has a third flat portion 191, as shown in FIG. Figure 5 As shown, the width of the first flat portion 141 is Wb1, and the width of the second flat portion 151 is Wb2. Figure 11 As shown, the width of the third flat patch 191 is Wb3, and the width Wb1 of the first flat portion 141, the width Wb2 of the second flat portion 151, and the width Wb3 of the third flat portion 191 satisfy: Wb1≤Wb2<Wb3. Here, the width Wb1 of the first flat portion 141, the width Wb2 of the second flat portion 151, and the width Wb3 of the third flat portion 191 do not include the chamfered portion. Specifically, Wb1 is preferably not greater than 1.5 mm, and Wb3 is preferably not less than 2 mm. By providing the flat portion, the contact area between the heat exchange plates 10 and the heat exchange plates 10, or between the heat exchange plates 10 and the fins, is increased, thereby increasing the overall strength of the heat exchanger 1.

[0046] Of course, the first corner hole 31 and the fourth corner hole 34 can be located on the same side of the heat exchange plate 10, and the second corner hole 32 and the third corner hole 33 can be located on the other side of the heat exchange plate 10 to achieve diagonal flow of the heat exchange fluid, that is, the inlet and outlet of the fluid channel are located on different sides of the heat exchange plate.

[0047] In some specific embodiments, the first protrusion 12 may be a corrugated protrusion, and a plurality of corrugated protrusions are arranged along the length direction of the heat exchange plate 10, and a groove 18 is formed between two adjacent corrugated protrusions. Specifically, Figure 2 As shown, the first protrusion 12 is a single herringbone wave. The single herringbone wave means that the first protrusion 12 includes two extension sections 121 set at an angle. Each extension section 121 is inclined relative to the length direction of the heat exchange plate 10. The two extension sections 121 can be symmetrically set along the width direction of the heat exchange plate 10 or asymmetrically set. Some extension sections 121 can also extend along the length direction of the heat exchange plate 10. A first groove 181 is formed between adjacent corrugated protrusions, some of the second protrusions 13 are corrugated protrusions, and some of the second protrusions 13 are long strip protrusions.

[0048] In some embodiments, as Figures 8-15As shown, the first protrusion 12 is a corrugated protrusion. Specifically, the first protrusion 12 is a multiple herringbone wave. The multiple herringbone wave means that the first protrusion 12 includes multiple extension sections 121 arranged at an angle. Each extension section 121 is inclined relative to the length direction of the heat exchange plate 10. The number of extension sections 121 is greater than two. Figure 11 、 Figure 12 As shown, a third protrusion 16 protruding toward the first direction is provided between at least some adjacent two first protrusions 12, and a third groove 161 is formed on the back side of the third protrusion 16. The height of the third protrusion 16 relative to the first side surface 111 of the substrate 11 is less than the height of the first protrusion 12 relative to the first side surface 111 of the substrate 11, and a second groove 182 is provided between adjacent first protrusions and third protrusions. Through the arrangement of the third protrusion 16, an asymmetric structure of the heat exchange plate 10 is realized, that is, adjacent fluid channels have different flow areas, and different turbulence effects of the fluid channels are realized, and the heat exchange performance of the heat exchanger is improved through a more complex protrusion structure.

[0049] Of course, the asymmetric structure of the heat exchange plate can also adopt other structures, such as Figure 9 、 Figure 14 As shown, a fourth groove 171 recessed away from the first direction is provided between at least some adjacent two first protrusions 12, and a fourth protrusion 17 is formed on the back of the fourth groove 171. The height of the first protrusion 12 relative to the first side surface 111 of the substrate 11 is greater than the height of the fourth protrusion 17 relative to the second side surface 112 of the substrate 11. The first protrusion 12 is a corrugated protrusion, and multiple corrugated protrusions are arranged along the length direction of the heat exchange plate 10. The corrugated protrusion includes multiple extension sections 121, and the extension sections 121 are inclined relative to the length direction of the heat exchange plate 10. The fourth protrusion 17 is a corrugated protrusion and is located between two adjacent first grooves 14.

[0050] It is understandable that the first protrusion 12 may be a corrugated protrusion or other structures such as a dot wave. Figure 16 As shown, the dot wave refers to a concave structure formed on the back of the first protrusion 12. The structure of the first protrusion 12 corresponds to the structure of the concave structure, such as a circular protrusion or a polygonal pyramidal protrusion. The heat exchange plate 10 is also provided with a concave portion 113, and multiple first protrusions 12 are arranged around the concave portion 113. The second protrusion 13 can also adopt other structures. In addition to being closer to the ends of the heat exchange plate 10 relative to the first protrusion 12, the first and second protrusions 12, 13 can also be provided on both sides of the heat exchange plate 10 in the width direction, or at both ends in the length direction, etc. The distribution of the first and second protrusions 12, 13 can be adjusted according to the specific application requirements of the heat exchange plate 10.

[0051] like Figure 6 、 Figure 7As shown, the thickness of the substrate 11 of the heat exchange plate 10 is H, the depth of the first groove 14 relative to the second side surface of the substrate is Dp1, and the depth of the second groove 15 relative to the second side surface of the substrate is Dp2. The depth Dp1 of the first groove 14 relative to the second side surface of the substrate, the depth Dp2 of the second groove 15 relative to the second side surface of the substrate and the thickness H of the substrate 11 satisfy: Dp2<Dp1<Dp2+0.25H. Specifically, the thickness H of the substrate 11 can be 0.2-0.8 mm, and the depth Dp1 of the first groove 14 can be 0.9 mm. The depth Dp2 of the second groove 15 can be 0.85 mm. Since the thickness of the heat exchange plate 10 directly affects the degree of material thinning at the top of the protrusion, Dp2 is controlled to be less than Dp1 and less than Dp2+0.25H, so that the depths of the first groove 14 and the second groove 15 are reasonably adjusted according to the thickness of the heat exchange plate 10, thereby reducing the height difference between the top of the first protrusion 12 and the top of the second protrusion 13, and improving the flatness of the heat exchange plate 10. The flatness here means that the tops of the protrusions of the heat exchange plate 10 are at the same height as much as possible, and the height difference is controlled within a reasonable range.

[0052] In some specific embodiments, Figure 6 、 Figure 7 and Figure 12 、 Figure 13 As shown, the maximum width λ1 of the orthographic projection of the first groove 14 on the plane where the second side surface 112 of the substrate 11 is located, the maximum width λ2 of the orthographic projection of the second groove 15 on the plane where the second side surface 112 of the substrate 11 is located, and the depth Dp1 of the first groove 14 relative to the second side surface 112 of the substrate 11 and the depth Dp2 of the second groove 15 relative to the second side surface 112 of the substrate 11 satisfy: 0.55≤(λ1•DP2) / (λ2•DP1) ≤0.9. Since the maximum width of the orthographic projection of the groove on the plane where the second side surface 112 of the substrate 11 is located directly affects the degree of material thinning at the top of the protrusion, the smaller the maximum width of the orthographic projection of the groove on the plane where the second side surface 112 of the substrate 11 is located, the greater the deformation of the heat exchange plate 10 in the area where the groove is located, and the greater the degree of material thinning at the top of the protrusion, 0.55≤(λ1•DP2) / (λ2•DP1) ≤0.9 is controlled, so that the corresponding relationship between the depth of the first groove 14 and the depth of the second groove 15 is adjusted according to the maximum width of the orthographic projection of the first groove 14 and the second groove 15 on the plane where the second side surface 112 of the substrate 11 is located, thereby reducing the height difference between the top of the first protrusion 12 and the top of the second protrusion 13.

[0053] In some specific embodiments, the heat exchange plate 10 is made of an aluminum alloy plate, the thickness H of the substrate 11 is generally about 0.4-0.5 mm, the maximum width λ1 of the orthographic projection of the first groove 14 on the plane where the second side surface 112 of the substrate 11 is located and the depth Dp1 of the first groove 14 relative to the second side surface 112 of the substrate 11 satisfy: 2.5≤λ1 / DP1≤5, the maximum width λ2 of the orthographic projection of the second groove 15 on the plane where the second side surface 112 of the substrate 11 is located and the depth Dp2 of the second groove 15 relative to the second side surface 112 of the substrate 11 satisfy: 3.5≤λ2 / DP2≤7, so that the area where the first protrusion 12 is located has good heat exchange performance, and the top of the second protrusion has sufficient thickness to ensure the strength of the heat exchange plate 10. Specifically, on the one hand, the first protrusion 12 meets the technical requirement of 2.5≤λ1 / DP1≤5, prioritizing the product's heat exchange performance in the corresponding area. For example, placing the first protrusion 12 in the heat exchange zone 60 prioritizes the heat exchange performance of the heat exchange zone 60. This means that the first protrusion achieves superior material stretching design, providing more heat exchange area and a more detailed heat exchange space and structure. On the other hand, the second protrusion 13 meets the technical requirement of 3.5≤λ2 / DP2≤7, balancing the product's heat exchange performance and reliability in the corresponding area. For example, the second protrusion is placed in the corner hole area or the guide area between the corner hole area and the heat exchange area. Through appropriate material stretching, while meeting the flow and heat exchange requirements of the corresponding area, the wall thickness of the fluid channel and the strength of the post-weld structure are ensured. In addition, such an area prioritizes fluid distribution within the overall product's structural function, and the technical requirement of 3.5≤λ2 / DP2≤7 is also beneficial in this regard.

[0054] By providing the first and second protrusions 12, 13 on the heat exchange plate 10 and ensuring that the first and second protrusions 12, 13 conform to the aforementioned parameter relationship, the heat exchanger 1 achieves superior heat exchange performance and a reliable structure. On the one hand, in the heat exchange region 60, the fluid channel corresponding to the second side surface of the substrate 11 will have a denser and more uniform solder joint arrangement, enhancing the heat exchange effect and improving the structure of the fluid channel, making it particularly suitable for applications primarily using refrigerants. The first and second protrusions 12, 13 conforming to the aforementioned parameter relationship will further facilitate uniform material forming. Logically, superior heat exchange performance requires greater material thinning. This requires ensuring uniform forming of the heat exchange plate 10 during processing, minimizing the difference in maximum thinning between different areas, and eliminating local "shortcomings" in the product structure. This application, after effectively exploring the product's heat exchange performance and material forming characteristics, seeks to identify "commonly beneficial areas" for heat exchange performance and product strength, while meeting technical requirements. On the other hand, the two ends of the heat exchange plate 10 are key positions for the strength and distribution of the heat exchanger 1. The corner hole area of ​​the present application prioritizes strength and distribution, while taking into account superior heat exchange performance and reliable product structure.

[0055] In some embodiments, as Figure 7 、 Figure 13 As shown, the thickness of the top of the first protrusion 12 is h1, the thickness of the top of the second protrusion 13 is H3, the depth Dp1 of the first groove 14 relative to the second side surface 112 of the substrate 11, the depth Dp2 of the second groove 15 relative to the second side surface 112 of the substrate 11, the thickness h1 of the top of the first protrusion 12, and the thickness H3 of the top of the second protrusion 13 satisfy: -0.05mm≤(h1+ DP1)-(H3+ DP2) ≤ 0.05mm, so that the top of the first protrusion 12 and the top of the second protrusion 13 are basically at the same height, that is, the top of the first protrusion 12 and the top of the second protrusion 13 are basically in the same plane, so as to avoid the cold welding of the heat exchanger caused by the height of some protrusion tops being too low, wherein, the height of the top of the first protrusion and the top of the second protrusion is controlled not to exceed 0.05mm, and the cold welding of the heat exchanger can be easily avoided by solder filling and the like, thereby improving the overall performance of the heat exchanger. Specifically, the thickness h1 of the protrusion top of the first protrusion 12 can be 0.4mm, the thickness H3 of the protrusion top of the second protrusion 13 can be 0.45mm-0.5mm, the depth Dp1 of the first groove 14 relative to the second side surface 112 of the substrate 11 can be 0.9mm, and the depth Dp2 of the second groove 15 relative to the second side surface 112 of the substrate 11 can be 0.85mm-0.9mm.

[0056] The embodiment of the present application also provides a heat exchanger processing device, which is convenient for manufacturing the heat exchanger described in the above embodiment, such as Figures 17-29As shown, the processing device of the heat exchanger includes a first mold core 100 and a second mold core 200, the first mold core 100 includes a first base surface 101, wherein the first base surface 101 refers to the portion of the first mold core 100 without convex parts and concave parts, and the first mold core 100 is provided with a plurality of first convex parts 102 and second convex parts 105 protruding relative to the first base surface 101, the second mold core 200 includes a second base surface 201, the second base surface 201 refers to the portion of the second mold core 200 without convex parts and concave parts, and the second mold core 200 is provided with a plurality of first concave parts 202 and second concave parts 205 concave relative to the second base surface 201, the first convex parts 102 are correspondingly arranged with the first concave parts 202, the second convex parts 105 and the second concave parts 205 are correspondingly arranged, and the first convex parts 102 and the second concave parts 205 are correspondingly arranged. The first protrusion 102 and the first concave portion 202 correspond to the first protrusion 12 and the first groove 14 of the heat exchange plate 10, and the second protrusion 105 and the second concave portion 205 correspond to the second protrusion 13 and the second groove 15 of the heat exchange plate 10. The height of the first protrusion 102 relative to the first base surface 101 is defined as H1, the height of the second protrusion 105 relative to the first base surface 101 is defined as H2, the depth of the first concave portion 202 relative to the second base surface 201 is defined as H3, the depth of the second concave portion 205 relative to the second base surface 201 is defined as H4, the maximum width of the projection of the first protrusion 102 on the plane where the first base surface 101 is located is defined as w1, and the maximum width of the projection of the second protrusion 105 on the plane where the first base surface 101 is located is defined as w2. Among them, H1 / w1<H2 / w2, and H1>H2, because the first convex part 102 has a larger height or smaller width relative to the second convex part 105, during the processing, when the first convex part 102 acts on the heat exchange plate 10 to be processed, the corresponding area of ​​the heat exchange plate 10 is greatly deformed, the thickness of the top of the first convex part 12 formed by the processing of the heat exchange plate 10 is thinned, and the top of the first convex part 12 cannot be completely fitted with the surface of the mold core. If the height of the first convex part 102 relative to the first base surface 101 is exactly the height of the corresponding first convex part 12 on the heat exchange plate 10 to be formed, then the heat exchange plate 10 to be formed will be deformed due to the existence of material. Thinning results in insufficient height of the first protrusion 12 on the processed heat exchange plate 10 or insufficient depth of the first groove 14 on the back of the first protrusion 12, which affects the heat exchange performance. The height of the first protrusion 102 relative to the first base surface 101 is greater than the height of the second protrusion 105 relative to the first base surface 101, that is, the height of the first protrusion 12 of the heat exchange plate 10 is increased by increasing the height of the first protrusion 102, so that the surfaces of the first mold core 100 and the second mold core 200 are as closely fitted as possible to the surface of the processed heat exchange plate 10, reducing the difference between the finally formed heat exchange plate and the heat exchange plate to be formed, and meeting the heat exchange requirements of the heat exchanger.

[0057] The first mold core 100 or the second mold core 200 is moved, or the first mold core 100 and the second mold core 200 are moved simultaneously to process the heat exchange plate 10 located between the first mold core 100 and the second mold core 200. When the first base surface 101 of the first mold core 100 contacts one side of the substrate 11 of the heat exchange plate 10, and the second base surface 201 of the second mold core 200 contacts the other side of the substrate 11 of the heat exchange plate 10, or when the first mold core 100 and the second mold core 200 slightly squeeze the substrate 11 of the heat exchange plate 10, the first mold core 100 and the second mold core 200 are matched. When the first mold core 100 and the second mold core 200 are matched, the first mold core 100 and the second mold core 200 are matched. A predetermined distance is defined between the first base surface 101 and the second base surface 201. For example, the predetermined distance is set to the thickness of the substrate 11 of the heat exchange plate 10 to be processed, or slightly larger or smaller than the thickness of the substrate 11. This difference is mainly used to control the reasonable tolerance of the positions of the first mold core 100 and the second mold core 200. The predetermined distance between the first base surface 101 and the second base surface 201 is defined as H0. The height H1 of the first convex portion 102 relative to the first base surface 101 and the depth H3 of the first concave portion 202 relative to the second base surface 201 satisfy: 0

[0058] In some specific embodiments, Figure 23 、 Figure 29 ​As shown, the first mold core 100 includes a first corner hole area and a first heat exchange area 400, the first corner hole area includes a first sub-area 301 and a second sub-area 302, along the length direction of the first mold core 100, the first sub-area 301 is close to the first end of the first mold core 100, the second sub-area 302 is close to the second end of the first mold core 100, and the first heat exchange area 400 is located between the first sub-area 301 and the second sub-area 302, the second mold core 200 includes a second corner hole area and a second heat exchange area (not shown in the figure), the second corner hole area includes a third sub-area and a fourth sub-area (not shown in the figure), along the length direction of the second mold core 200, the third sub-area is close to the first end of the second mold core 200, the fourth sub-area is close to the second end of the second mold core 200, and the second heat exchange area is located Between the third sub-area and the fourth sub-area, the first corner hole area is corresponding to the second corner hole area, the first heat exchange area 400 is corresponding to the second heat exchange area, the first convex portion 102 is provided in the first heat exchange area 400, the first concave portion 202 is provided in the second heat exchange area, the first corner hole area is provided with a second convex portion 105, and the second corner hole area is provided with a second concave portion 205 corresponding to the second convex portion 105, wherein the second convex portion 105 can be provided only in the first sub-area 301 or the second sub-area 302, or can be provided in the first sub-area 301 and the second sub-area 302 at the same time, the second concave portion 205 can be provided only in the third sub-area or the fourth sub-area, or can be provided in the third sub-area and the fourth sub-area at the same time, when the first mold core 100 is provided in conjunction with the second mold core 200, the second convex portion The distance between the first protrusion 105 and the second concave portion 205 is greater than the distance between the first protrusion 102 and the first concave portion 202. Since the first heat exchange zone 400 of the first mold core 100 and the second heat exchange zone of the second mold core 200 correspond to the heat exchange zone 60 of the heat exchange plate 10, and the first corner hole zone of the first mold core 100 and the second corner hole zone 600 of the second mold core 200 correspond to the corner hole zone of the heat exchange plate 10, in order to improve the heat exchange performance of the heat exchange zone 60 and the wall thickness of the fluid channel in the corner hole zone and the strength of the structure after welding, the maximum width of the orthographic projection of the first groove 14 on the back side of the first protrusion 12 of the heat exchange zone 60 on the second side surface 112 of the substrate 11 is usually smaller than the maximum width of the orthographic projection of the second groove 15 on the back side of the second protrusion 13 in the corner hole zone on the second side surface 112 of the substrate 11. The maximum width of the positive projection of the second side surface 112, that is, the deformation of the heat exchange plate in the area corresponding to the first protrusion 12 is greater than the deformation of the heat exchange plate 10 in the area corresponding to the second protrusion 13, and the degree of thinning of the material at the top of the first protrusion 12 is greater than the degree of thinning of the material at the top of the second protrusion 13. In order to make the top of the first protrusion 12 and the top of the second protrusion 13 as close to the same height as possible and avoid cold welding of the heat exchanger, the distance between the second protrusion 105 and the second concave portion 205 is greater than the distance between the first protrusion 102 and the first concave portion 202, so that the top of the first protrusion 12 and the top of the second protrusion 13 are in contact with the first concave portion 202 and the second concave portion 205 of the corresponding second mold core 200 as much as possible, thereby reducing the height difference between the first protrusion 12 and the second protrusion 13.

[0059] In some specific embodiments, the height H1 of the first convex portion 102 relative to the first base surface 101 and the maximum width w1 of the projection of the first convex portion 102 on the plane where the first base surface 101 is located, as well as the height H2 of the second convex portion 105 relative to the first base surface 101 and the maximum width w2 of the projection of the second convex portion 105 on the plane where the first base surface 101 is located, satisfy the following conditions: 2.5≤H1 / w1≤5, 3.5≤H2 / w2≤7. The first protrusion 102 formed corresponding to the heat exchange plate 10 has sufficient depth and a smaller width, and has better heat exchange performance. The width or depth of the second protrusion 13 formed corresponding to the heat exchange plate 10 is smaller than the first protrusion 12, and has better structural reliability. By controlling the parameter relationship between the first protrusion 102 and the second protrusion 105, the heat exchange performance and product reliability of the heat exchanger are balanced. For example, the second protrusion 13 is arranged in the corner hole area or the guide area between the corner hole area and the heat exchange area. Through appropriate material stretching, while meeting the flow and heat exchange requirements of the corresponding area, the wall thickness of the fluid channel and the strength of the post-weld structure are ensured. In addition, in such an area, fluid distribution is prioritized in the structural function of the overall product. The technical requirement of 3.5≤λ2 / DP2≤7 is also beneficial in this regard.

[0060] In some specific embodiments, when the first protrusion 12 of the heat exchange plate 10 is a corrugated protrusion, the first protrusion 102 of the first mold core 100 is a corresponding corrugated protrusion, and multiple corrugated protrusions are arranged along the length direction of the first mold core 100. The corrugated protrusion includes multiple first extension sections 1021, and the first extension sections 1021 are inclined relative to the length direction of the first mold core 100. The first concave portion 202 is a corrugated groove, and the corrugated groove includes multiple second extension sections 2021, and the second extension sections 2021 are inclined relative to the length direction of the second mold core 200. Figures 17-22 As shown, the first convex portion 102 and the first concave portion 202 are single herringbone waveforms, and part of the second convex portion 105 and part of the second concave portion 205 can be single herringbone waveforms. The single herringbone waveform has been introduced in the above-mentioned heat exchange plate 10 and will not be repeated here. Part of the second convex portion 105 and part of the second concave portion 205 can be long strips or other shapes. Of course, the first convex portion 102 and the first concave portion 202 can also adopt other shapes.

[0061] In some specific embodiments, Figure 23 、 Figure 24 、 Figure 28As shown, a fourth recess 104 is provided between at least two adjacent first protrusions 102, and a height of the first protrusion 102 relative to the first base surface 101 is greater than a height of the first protrusion 102 relative to the fourth recess 104. A fourth protrusion 204 is provided between at least two adjacent first recesses 202, and a height of the first recess 202 relative to the second base surface 201 is greater than a height of the first recess 202 relative to the fourth protrusion 204. The fourth protrusion 204 and the fourth recess 104 are provided correspondingly, and a distance between the first protrusion 102 and the first recess 202 is smaller than a distance between the fourth protrusion 204 and the fourth recess 104, thereby forming an asymmetric convex structure on the front and back sides of the heat exchange plate 10, so that the flow areas of the fluid channel on the front side of the heat exchange plate 10 and the fluid channel on the back side of the heat exchange plate 10 are different, so as to meet the heat exchange requirements of different heat exchange media.

[0062] In some specific embodiments, Figure 27 As shown, a third convex portion 103 is provided between at least some adjacent two first convex portions 102, and the height of the third convex portion 103 relative to the first base surface 101 is less than the height of the first convex portion 102 relative to the first base surface 101. A third concave portion 203 is provided between at least some adjacent first concave portions 202, and the third convex portion 103 and the third concave portion 203 are correspondingly arranged. The distance between the first convex portion 102 and the first concave portion 202 is less than the distance between the third convex portion 103 and the third concave portion 203. Similarly, the heat exchange plate 10 forms an asymmetric convex structure on the front and back sides, so that the flow area of ​​the fluid channel on the front side of the heat exchange plate 10 is different from that of the fluid channel on the back side of the heat exchange plate 10, so as to meet the heat exchange requirements of different heat exchange media. In addition, this processing device is suitable for heat exchange plates with complex structures, can process complex curved surface shapes, and reduce the problems of cracking and insufficient depth of the heat exchange plate caused by relatively large material thinning during stamping.

[0063] In some embodiments, in order to process Figure 16 The first protrusion shown in the figure, the first concave portion 202 adopts a pit structure, the first protrusion 102 is a protrusion structure corresponding to the shape of the pit structure, the first mold core 100 is also provided with a fifth concave portion (not shown in the figure), and multiple first protrusions 102 are arranged around the fifth concave portion. The second mold core 200 is also provided with a fifth protrusion (not shown in the figure), and multiple first concave portions are arranged around the fifth protrusion, and the fifth protrusion is arranged corresponding to the fifth concave portion.

[0064] The present application also provides a heat exchanger processing method, including a heat exchange plate 10 and the heat exchanger processing device described above. The heat exchange plate 10 has a first side surface 111 and a second side surface 112. The processing method includes:

[0065] a. Place the heat exchange plate 10 between the first mold core 100 and the second mold core 200, with the first side 111 facing the first mold core 100 and the second side 112 facing the second mold core 200;

[0066] b. Move the first mold core 100 and / or the second mold core 200, and close the mold together with the second mold core 100. During the closing process, the first convex portion 102 pushes the local heat exchange plate 10 toward the first concave portion 202 to form a first groove 14. The back of the first groove 14 forms a first protrusion 12. The distance between the second convex portion 105 and the second concave portion 205 is greater than the distance between the first convex portion 102 and the first concave portion 202.

[0067] During the processing, when the first protrusion 102 acts on the heat exchange plate 10 to be processed, the deformation of the corresponding area of ​​the heat exchange plate 10 is large, and the thickness of the top of the first protrusion 12 formed by the heat exchange plate 10 is thinned. The top of the first protrusion 12 cannot be completely fitted with the surface of the mold core. If the height of the first protrusion 102 relative to the first base surface 101 is exactly the height of the corresponding first protrusion 12 on the heat exchange plate 10 to be formed, the heat exchange plate 10 formed by the processing will have insufficient height of the first protrusion 12 or insufficient depth of the first groove 14 on the back of the first protrusion 12 due to the thinning of the material, which affects the heat exchange performance. The thickness reduction amount of the top of the second protrusion 13 is less than the thickness reduction amount of the top of the first protrusion 12, and the distance between the top of the second protrusion 13 and the second mold core 200 is smaller than the distance between the top of the first protrusion 12 and the second mold core 200. The distance between the second protrusion 105 and the second recess 205 is greater than the distance between the first protrusion 102 and the first recess 202, and the distance between the top of the first protrusion 102 and the bottom of the first recess 202 is reduced, so that the surfaces of the first mold core 100 and the second mold core 200 are as close as possible to the surface of the processed heat exchange plate 10, reducing the difference between the finally formed heat exchange plate 10 and the heat exchange plate 10 to be formed, thereby meeting the heat exchange requirements of the heat exchanger 1.

[0068] It can be understood that the structures of the convex and concave parts of the first mold core 100 and the second mold core 200 can be any other structures, and the first mold core 100 and the second mold core 200 can ensure the corresponding settings of the positions of the convex and concave parts through limiting structures, such as through mold frames.

[0069] The heat exchanger provided by the present invention has been described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A heat exchanger processing device, comprising a first mold core and a second mold core, wherein the first mold core comprises a first base surface, the first mold core is provided with a plurality of first convex portions and a plurality of second convex portions protruding relative to the first base surface, the second mold core comprises a second base surface, the second mold core is provided with a plurality of first concave portions and a plurality of second concave portions recessed relative to the second base surface, the first convex portions are provided correspondingly to the first concave portions, and the second convex portions are provided correspondingly to the second concave portions, wherein: Define the height of the first convex portion relative to the first base surface as H1, define the maximum width of the projection of the first convex portion on the plane where the first base surface is located as w1, define the height of the second convex portion relative to the first base surface as H2, and define the maximum width of the projection of the second convex portion on the plane where the first base surface is located as w2, wherein H1 / w1<H2 / w2, and H1>H2.

2. The heat exchanger processing device according to claim 1, characterized in that: When the first mold core and the second mold core are arranged in cooperation, the first base surface and the second base surface have a predetermined distance, and the predetermined distance between the first base surface and the second base surface is defined as H0, wherein 0<H1-H2≤2.8H0, and / or, 0<H1-H3≤2.8H0.

3. The heat exchanger processing device according to claim 1, characterized in that: The height H1 of the first convex portion relative to the first base surface and the maximum width w1 of the projection of the first convex portion on the plane where the first base surface is located satisfy: 2.5≤H1 / w1≤5, and the height H2 of the second convex portion relative to the first base surface and the maximum width w2 of the projection of the second convex portion on the plane where the first base surface is located satisfy: 3.5≤H2 / w2≤7.

4. The heat exchanger processing device according to claim 2, characterized in that: The first convex portion is a corrugated protrusion, and multiple corrugated protrusions are arranged along the length direction of the first mold core. The corrugated protrusion includes multiple first extension segments, and the first extension segments are inclined relative to the length direction of the first mold core; the first concave portion is a corrugated groove, and the corrugated groove includes multiple second extension segments, and the second extension segments are inclined relative to the length direction of the second mold core.

5. The heat exchanger processing device according to claim 4, characterized in that: A third convex portion is provided between at least two adjacent first convex portions, and the height of the third convex portion relative to the first base surface is smaller than the height of the first convex portion relative to the first base surface. A third concave portion is provided between at least some adjacent first concave portions, and the third convex portion is arranged corresponding to the third concave portion, and the distance between the first convex portion and the first concave portion is smaller than the distance between the third convex portion and the third concave portion.

6. The heat exchanger processing device according to claim 4, characterized in that: A fourth recess is provided between at least two adjacent first recesses, and the height of the first recess relative to the first base surface is greater than the height of the first recess relative to the fourth recess. A fourth recess is provided between at least two adjacent first recesses, and the height of the first recess relative to the second base surface is greater than the height of the first recess relative to the fourth recess. The fourth recess and the fourth recess are arranged correspondingly, and the distance between the first recess and the first recess is less than the distance between the fourth recess and the fourth recess.

7. The heat exchanger processing device according to claim 2, characterized in that: The first concave portion is a pit structure, the first convex portion is a convex structure corresponding to the shape of the pit structure, the first mold core is also provided with a fifth concave portion, and multiple first convex portions are arranged around the fifth concave portion, the second mold core is also provided with a fifth convex portion, and multiple first concave portions are arranged around the fifth convex portion, and the fifth convex portion is arranged corresponding to the fifth concave portion.

8. The heat exchanger processing device according to any one of claims 1 to 7, characterized in that: The first mold core includes a first corner hole area and a first heat exchange area, the first corner hole area includes a first sub-area and a second sub-area. Along the length direction of the first mold core, the first sub-area is close to the first end of the first mold core, and the second sub-area is close to the second end of the first mold core. The first heat exchange area is located between the first sub-area and the second sub-area. The second mold core includes a second corner hole area and a second heat exchange area. The second corner hole area includes a third sub-area and a fourth sub-area. Along the length direction of the second mold core, the third sub-area is close to the first end of the second mold core, and the fourth sub-area is close to the second end of the second mold core. The second heat exchange area is located between the third sub-area and the fourth sub-area. In addition, the first corner hole area is arranged corresponding to the second corner hole area, and the first heat exchange area is arranged corresponding to the second heat exchange area. The first convex portion is arranged in the first heat exchange area, the first concave portion is arranged in the second heat exchange area, the second convex portion is arranged in the first corner hole area, and the second concave portion is arranged in the second corner hole area. When the first mold core and the second mold core are arranged in combination, the distance between the second convex portion and the second concave portion is greater than the distance between the first convex portion and the first concave portion.

9. The heat exchanger processing device according to claim 8, characterized in that: The first corner hole area is further provided with a boss portion protruding relative to the first base surface, the height of the boss portion is smaller than the height of the first convex portion, and the height of the boss portion is not greater than the height of the second convex portion.

10. A method for processing a heat exchanger, comprising a heat exchange plate and a heat exchanger processing device according to any one of claims 1 to 9, wherein the heat exchange plate has a first side surface and a second side surface, and the processing method comprises: a. placing the heat exchange plate between the first mold core and the second mold core, with the first side facing the first mold core and the second side facing the second mold core; b. Move the first mold core and / or the second mold core, and close the mold together with the second mold core. During the closing process, the first convex portion pushes a portion of the heat exchange plate toward the first concave portion to form a first groove, and a first convex portion is formed on the back side of the first groove. The second convex portion pushes a portion of the heat exchange plate toward the second concave portion to form a second groove, and a second convex portion is formed on the back side of the second groove. The distance between the second convex portion and the second concave portion is greater than the distance between the first convex portion and the first concave portion.

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