Sheet metal structure and heat exchanger

Abstract

The application relates to a sheet metal structure and a heat exchanger. The sheet metal structure comprises a first sheet metal plate and a second sheet metal plate. The first sheet metal plate is spliced with the second sheet metal plate through a connecting structure. A surface where the first sheet metal plate and the second sheet metal plate are spliced is defined as a splicing surface. The connecting structure has at least two groups and is arranged along the length direction of the splicing surface at intervals. The connecting structure comprises a convex part and a slot which are inserted and matched. One of the convex part and the slot is arranged on the splicing surface of the first sheet metal plate, and the other of the convex part and the slot is arranged on the splicing surface of the second sheet metal plate. The foregoing arrangement mode makes the whole disassembly process convenient and fast, and avoids the complexity caused by fastener connection.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, and in particular to a sheet metal structure and a heat exchanger. Background Technology

[0002] Current heat exchangers typically include a sheet metal structure, which encloses a space to accommodate heat exchange components such as heat exchange fins. The sheet metal plates in the sheet metal structure usually have mounting holes for easy installation of heat exchange tubes.

[0003] In existing sheet metal structures, adjacent sheet metal plates are fixed together using fasteners such as rivets, bolts, or screws. When using fasteners, corresponding holes need to be drilled, and during installation, these holes must be aligned, resulting in low installation efficiency and the possibility of using unsuitable fastener materials. Furthermore, special tools are required to tighten the fasteners during assembly and disassembly, making the process inconvenient. Utility Model Content

[0004] Therefore, it is necessary to provide a sheet metal structure that does not require fasteners to facilitate easy assembly and disassembly.

[0005] This application provides a sheet metal structure, including a first sheet metal plate and a second sheet metal plate. The first sheet metal plate is spliced ​​together with the second sheet metal plate through a connecting structure. The surface where the first sheet metal plate and the second sheet metal plate are spliced ​​is defined as the splicing surface. There are at least two sets of connecting structures, which are arranged at intervals along the length direction of the splicing surface. The connecting structure includes a protrusion and a slot that interlock. One of the protrusion and the slot is disposed on the splicing surface of the first sheet metal plate, and the other of the protrusion and the slot is disposed on the splicing surface of the second sheet metal plate.

[0006] In one embodiment, the board on which the splicing surface with the slot is located is defined as a wall panel, the splicing surface extending along the width direction of the wall panel, and the splicing surface with the protrusion is defined as a first splicing surface.

[0007] In one embodiment, the width direction of the wall panel is defined as a first direction, and the length direction of the wall panel is defined as a second direction. The slots in at least two sets of the connection structures extend along the second direction and are defined as first slots; or, in two adjacent sets of the connection structures, the slots in one set of the connection structures extend along the second direction and are defined as first slots, while the slots in the other set of the connection structures extend along the first direction and are defined as second slots.

[0008] In one embodiment, the connection structure has three sets, wherein the slots in two sets of the connection structure are the first slots, and the slots in the other set of the connection structure are the second slots, the second slots are located between the two first slots, and the protrusions on the second sheet metal plate that match the corresponding second slots are interference-fitted into the second slots.

[0009] In one embodiment, the protrusion that matches the first slot is defined as a first protrusion, and the protrusion that matches the second slot is defined as a second protrusion. The first splicing surface includes two first side edges arranged at intervals along the first direction and a second side edge connecting the two first side edges. The second side edge extends along the first direction. The first protrusion is disposed on the corresponding first side edge, and the second protrusion is disposed on the second side edge.

[0010] In one embodiment, both first side edges extend toward each other along the first direction to form an extension plate, and the first protrusion is disposed on the corresponding extension plate; and / or, the second side edge of the second sheet metal plate extends toward the first splicing surface to form a protrusion plate, and the second protrusion of the second sheet metal plate is disposed on the protrusion plate and extends outward along the thickness direction of the protrusion plate.

[0011] In one embodiment, the wall of the second sheet metal plate has an opening that allows the groove wall of the second slot to deform in the thickness direction of the second protrusion.

[0012] In one embodiment, when the first side edge is provided with the extension plate and the second side edge is provided with the protruding plate, when the first sheet metal plate and the second sheet metal plate are in a spliced ​​state, the outer wall surface of the extension plate and the outer wall surface of the protruding plate both abut against the inner wall surface of the oppositely arranged wall panel; and / or, the outer wall surface of the extension plate is flush with the adjacent second side edge.

[0013] In one embodiment, the first protrusion is flush with the second protrusion; and / or, the distance between the first protrusion and the extension plate along the second direction is H1, and the distance between the second protrusion and the second side edge along the second direction is H2, wherein the distances H1 and H2 satisfy: 0.8mm < H1 ≤ 2mm, 0.8mm < H2 ≤ 2mm.

[0014] In one embodiment, the two short sides of the wall panel arranged opposite each other along its own length direction are a first short side and a second short side, the slot is arranged close to the first short side, and both the first sheet metal plate and the second sheet metal plate include the wall panel and the first splicing surface, the first splicing surface being connected to the second short side corresponding to the wall panel.

[0015] In one embodiment, the first sheet metal plate and the second sheet metal plate are at an angle to each other, and there are two of each type of sheet metal plate. The wall of the first sheet metal plate is defined as the first wall, and the wall of the second sheet metal plate is defined as the second wall. The length of the second wall is less than the length of the first wall. The two first sheet metal plates are arranged at intervals relative to each other along the length direction of the second wall, and the two second sheet metal plates are arranged at intervals relative to each other along the length direction of the first wall. The two ends of each first sheet metal plate are respectively connected to the second sheet metal plate on the corresponding side through the connecting structure. The sheet metal structure is formed by sequentially and alternately splicing the first sheet metal plate and the second sheet metal plate.

[0016] In one embodiment, the distance between the inner wall surfaces of the two first wall panels is L, the distance between the slot furthest from the first short side and the second short side is L1, and the wall thickness of the first sheet metal plate is h. L, L1 and h satisfy: h+L≤L1≤2h+L.

[0017] This application also discloses a heat exchanger, including a sheet metal structure, wherein the sheet metal structure is the sheet metal structure described in any of the above embodiments, and a mounting hole for mounting a heat exchange tube is provided on the wall of one of the first sheet metal plate and the second sheet metal plate.

[0018] Compared with the prior art, in the sheet metal structure provided in this application, the first sheet metal plate and the second sheet metal plate are spliced ​​together by a connecting structure. The splicing is carried out by at least two sets of connecting structures arranged at intervals along the length direction of the splicing surface, which improves the stability of the connection between the first sheet metal plate and the second sheet metal plate. The connecting structure adopts a structure in which the protrusion and the slot are inserted and matched. During installation, it is only necessary to insert the protrusion into the slot on the corresponding side, which is convenient for installation. During disassembly, it is only necessary to disengage the protrusion from the slot. The entire disassembly and assembly process is convenient and quick, avoiding the cumbersomeness brought about by fastener connection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a sheet metal structure according to an embodiment of this application;

[0021] Figure 2 for Figure 1 A magnified view of a section at point I;

[0022] Figure 3 for Figure 1 A schematic diagram of the three-dimensional exploded structure;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of the first sheet metal plate in the middle;

[0024] Figure 5 for Figure 4 Another structural diagram;

[0025] Figure 6 for Figure 1 Schematic diagram of the structure of the second sheet metal plate;

[0026] Figure 7 for Figure 6 Enlarged view of section II in the middle;

[0027] Figure 8 for Figure 6 Another structural diagram;

[0028] Figure 9 for Figure 8 A magnified view of a section at point III;

[0029] Figure 10 This is a schematic diagram of a sheet metal structure according to another embodiment of this application;

[0030] Figure 11 for Figure 10 A magnified view of a section at point IV in the middle;

[0031] Figure 12 for Figure 10 Mid-section view;

[0032] Figure 13 for Figure 12 A magnified view of the middle V section;

[0033] Figure 14 for Figure 10 A structural schematic diagram of the second sheet metal plate.

[0034] Reference numerals: 1. First sheet metal plate; 11. First wall panel; 2. Second sheet metal plate; 21. Second wall panel; 211. Mounting hole; 3. Connecting structure; 31. First slot; 32. Second slot; 33. Extension plate; 331. First protrusion; 34. Second protrusion; 4. First splicing surface; 41. First side edge; 42. Second side edge; 421. Protruding plate; 422. Connecting part; 51. First short side; 52. Second short side; 53. Flanged edge; 6. Opening part. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, and may be at an angle to the axial direction.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0041] See Figures 1-9 As shown, this application discloses a sheet metal structure. The sheet metal structure includes a first sheet metal plate 1 and a second sheet metal plate 2. The first sheet metal plate 1 is spliced ​​together with the second sheet metal plate 2 through a connecting structure 3. The surface where the first sheet metal plate 1 and the second sheet metal plate 2 are spliced ​​is defined as the splicing surface. There are at least two sets of connecting structures 3, which are arranged at intervals along the length direction of the splicing surface. The connecting structure 3 includes a protrusion and a slot that interlock. One of the protrusion and the slot is located on the splicing surface of the first sheet metal plate 1, and the other of the protrusion and the slot is located on the splicing surface of the second sheet metal plate 2.

[0042] Understandably, the first sheet metal plate 1 and the second sheet metal plate 2 are spliced ​​together by the connecting structure 3. The splicing is carried out by at least two sets of connecting structures 3 arranged at intervals along the length of the splicing surface, which improves the stability of the connection between the first sheet metal plate 1 and the second sheet metal plate 2. The connecting structure 3 adopts a structure in which the protrusion and the slot are interlocked. During installation, it is only necessary to insert the protrusion into the slot on the corresponding side, which is convenient for installation. During disassembly, it is only necessary to disengage the protrusion from the slot. The entire disassembly and assembly process is convenient and quick, avoiding the cumbersomeness brought about by fastener connection.

[0043] The panel containing the slotted splicing surface is defined as a wall panel, and the splicing surface extends along the width of the wall panel, such as... Figure 2 As shown, the splicing surface with the protrusion is defined as the first splicing surface 4. Schematic, the first sheet metal plate 1 and the second sheet metal plate 2 can be sequentially spliced ​​along the length of the first sheet metal plate 1, in which case the splicing surface extends along the width of the wall panel. Alternatively, the first sheet metal plate 1 and the second sheet metal plate 2 can be sequentially spliced ​​along the width of the first sheet metal plate 1, in which case the splicing surface extends along the length of the wall panel.

[0044] In this embodiment, such as Figure 1 As shown, the first sheet metal plate 1 and the second sheet metal plate 2 form an angle with each other, which is illustrative and may include right angles, obtuse angles, or acute angles. The following detailed explanation will take the perpendicular splicing of the first sheet metal plate 1 and the second sheet metal plate 2 as an example.

[0045] The width direction of the wall panel is defined as the first direction A, and the length direction of the wall panel is defined as the second direction B. In one embodiment, the slots in at least two sets of connection structures 3 extend along the second direction B and are defined as the first slot 31. Specifically, there are only two sets of connection structures 3, and the slots in each set of connection structures 3 extend along the second direction B.

[0046] In other embodiments, in two adjacent sets of connection structures 3, the slot in one set of connection structures 3 extends along the second direction B and is defined as the first slot 31, while the slot in the other set of connection structures 3 extends along the first direction A and is defined as the second slot 32. Illustratively, there are only two sets of connection structures 3.

[0047] In this embodiment, such as Figure 1 , Figures 3-6 As shown, the connection structure 3 has three sets. Two sets of connection structures 3 have slots that are first slots 31, and the other set has slots that are second slots 32, located between the two first slots 31. It can be understood that this design method can achieve both limiting constraints on the first sheet metal plate 1 and the second sheet metal plate 2 in the first direction A and the second direction B, while also increasing the constraint area of ​​the splicing surface, which is beneficial to improving the reliability of the connection between the first sheet metal plate 1 and the second sheet metal plate 2.

[0048] like Figures 1-3 As shown, the protrusion that matches the first slot 31 is defined as the first protrusion 331, and the protrusion that matches the second slot 32 is defined as the second protrusion 34. Figure 4 , Figures 6-9 As shown, the first splicing surface 4 includes a first side edge 41 and a second side edge 42. There are two first side edges 41, which are arranged at intervals along a first direction A. The second side edge 42 is located between the two first side edges 41 and extends along the first direction A. Both ends of the second side edge 42 are connected to the corresponding ends of the corresponding first side edges 41, that is, the second side edge 42 connects between the two first side edges 41. Figure 7 As shown, the first protrusion 331 is provided on the corresponding first side edge 41, that is, the first side edge 41 is provided with the first protrusion 331, and the aforementioned second protrusion 34 is provided on the second side edge 42. It can be understood that by providing the first protrusion 331 and the second protrusion 34 on the corresponding side edges, the formation of the first protrusion 331 and the second protrusion 34 can be facilitated.

[0049] In this embodiment, such as Figures 5-9As shown, both first side edges 41 extend towards each other along the first direction A to form extension plates 33, and first protrusions 331 are disposed on the corresponding extension plates 33. It can be understood that the presence of the extension plates 33 allows the first protrusions 331 and the extension plates 33 to form a spring-loaded latch, that is, the first protrusions 331 can move relative to the wall panel along the second direction B under the action of the extension plates 33, which facilitates the insertion of the first protrusions 331 into the corresponding first slots 31.

[0050] When the first sheet metal plate 1 and the second sheet metal plate 2 are in the assembled state, the outer wall surface of the extension plate 33 abuts against the inner wall surface of the oppositely arranged wall panel 21. That is, the outer wall surface of the extension plate 33 on the first sheet metal plate 1 abuts against the inner wall surface of the second wall panel 21. Furthermore, the outer wall surface of the extension plate 33 on the second sheet metal plate 2 abuts against the inner wall surface of the first wall panel 11. See details [link to documentation]. Figure 2 As shown.

[0051] Understandably, increasing the stress-bearing area at the joint between the first sheet metal plate 1 and the second sheet metal plate 2 reduces stress concentration and helps improve the reliability of the connection between the first sheet metal plate 1 and the second sheet metal plate 2.

[0052] Furthermore, in this embodiment, such as Figure 2 , Figure 5 and Figure 8 As shown, when the first sheet metal plate 1 and the second sheet metal plate 2 are in the assembled state, the outer wall surface of the extension plate 33 is flush with the adjacent second side edge 42. That is to say, as Figure 5 As shown, the outer wall surface of the extension plate 33 on the first sheet metal plate 1 is flush with the second side edge 42 of the first sheet metal plate 1. Figure 9 As shown, the outer wall surface of the extension plate 33 on the second sheet metal plate 2 is flush with the second side edge 42 of the second sheet metal plate 2. Since the outer wall surface of the extension plate 33 abuts against the inner wall surface of the oppositely arranged wall panel, the second side edge 42 also abuts against the inner wall surface of the corresponding side wall panel. The aforementioned arrangement further increases the stress-bearing area at the joint between the first sheet metal plate 1 and the second sheet metal plate 2.

[0053] In other embodiments, the extension plate 33 may be omitted.

[0054] like Figure 5 and Figure 9 As shown, the first protrusion 331 and the second protrusion 34 are flush. It is understandable that after the first sheet metal plate 1 and the second sheet metal plate 2 are assembled, there will be no height difference, i.e., no uneven appearance. Furthermore, it facilitates insertion during assembly, avoiding the problem of wobbling during insertion due to inconsistent heights.

[0055] The distance between the first protrusion 331 and the extension plate 33 along the second direction B is H1, and the distance between the second protrusion 34 and the second side edge 42 along the second direction B is H2. The distances H1 and H2 satisfy: 0.8mm < H1 ≤ 2mm, 0.8mm < H2 ≤ 2mm. It is understandable that if the dimensions are too small, the first protrusion 331 and the second protrusion 34 are prone to detaching from their corresponding slots. If the dimensions are too large, too much of the first protrusion 331 and the second protrusion 34 will be exposed, affecting the appearance and increasing the risk of scratches. Using the above-mentioned size range increases the reliability after assembly.

[0056] like Figure 2 and Figure 6 As shown, the two short sides of the aforementioned wall panel, arranged opposite each other along its length, are the first short side 51 and the second short side 52, respectively, with the slot positioned close to the first short side 51. Both the first sheet metal plate 1 and the second sheet metal plate 2 include the aforementioned wall panel and a first splicing surface 4, which is connected to the second short side 52 of the corresponding wall panel. The wall panel of the first sheet metal plate 1 is defined as the first wall panel 11, and the wall panel of the second sheet metal plate 2 is defined as the second wall panel 21. Thus, in the first sheet metal plate 1, the first splicing surface 4 is connected to the second short side 52 of the first wall panel 11. In the second sheet metal plate 2, the first splicing surface 4 is connected to the second short side 52 of the second wall panel 21. In this embodiment, the second short side 52 is the aforementioned second side edge 42.

[0057] In other words, slots and protrusions are respectively provided on both sides of the length direction of the first sheet metal plate 1, and protrusions and slots are also respectively provided on both sides of the length direction of the second sheet metal plate 2. After the first sheet metal plate 1 and the second sheet metal plate 2 are assembled, it is convenient for subsequent components to be connected to the side of the first sheet metal plate 1 away from the second sheet metal plate 2.

[0058] In addition, except for the second short side 52, all the side edges of the aforementioned wall panels extend outward along the thickness direction of the wall panels to form flanges 53. The flanges 53 increase the overall robustness of the first sheet metal plate 1 and the second sheet metal plate 2.

[0059] In this embodiment, such as Figures 1-3 As shown, there are two of each of the above-mentioned first sheet metal plate 1 and second sheet metal plate 2. The two first sheet metal plates 1 are arranged at intervals relative to each other along the length direction of the second wall panel 21, and the two second sheet metal plates 2 are arranged at intervals relative to each other along the length direction of the first wall panel 11. The two ends of each first sheet metal plate 1 are connected to the corresponding second sheet metal plate 2 through the connecting structure 3. The sheet metal structure is formed by sequentially and alternately splicing the first sheet metal plate 1 and the second sheet metal plate 2. That is to say, the sheet metal structure is a ring-shaped frame structure.

[0060] It is understandable that, such as Figure 1 and Figure 3As shown, the two sides of the first sheet metal plate 1 are connected to the corresponding second sheet metal plate 2 via a connecting structure 3 that engages with protrusions and slots, facilitating the assembly of the two ends of the first sheet metal plate 1. Furthermore, the two ends of one of the first sheet metal plates 1 are inserted into the corresponding second sheet metal plate 2 along the first direction A and the second direction B, respectively, thus achieving limiting in the second direction B and the first direction A. The two ends of the other first sheet metal plate 1 are inserted into the corresponding second sheet metal plate 2 along the second direction B and the first direction A, respectively, thus achieving limiting in the first direction A and the second direction B, further increasing the reliability after assembly. Figure 1 and Figure 3 As shown, two second sheet metal plates 2 are arranged at intervals along the length of the first wall panel 11. The distance between the inner walls of the two first wall panels 11 is L, and the distance between the slot furthest from the first short side 51 and the second short side 52 is L1. The wall thickness of the first sheet metal plate 1 is h, and L, L1, and h satisfy: h+L≤L1≤2h+L. It can be understood that by adopting the aforementioned dimensional relationship, it is convenient to assemble the second sheet metal plate 2 with the two first sheet metal plates 1, reducing the probability of interference between the two ends of the second sheet metal plate 2 and the corresponding sides of the first sheet metal plate 1. In this embodiment, as... Figure 3 As shown, the wall thickness of the flange at the first short side 51 is equal to the wall thickness of the first sheet metal plate 1.

[0061] like Figure 1 , Figure 3 and Figure 10 As shown, the length of the second wall panel 21 is less than the length of the first wall panel 11. Therefore, the length direction of the sheet metal structure is the length direction of the first wall panel, and the width direction of the sheet metal structure is the length direction of the second wall panel 21.

[0062] Furthermore, the second protrusion 34 of the second sheet metal plate may also have a different structure from the second protrusion 34 of the first sheet metal plate. Specifically, for example... Figures 10-14 As shown, the second protrusion 34 of the second sheet metal plate 2 is interference-fitted into the corresponding second slot 32. This allows for limiting the length of the sheet metal structure, improving the reliability of the assembly of the sheet metal structure in the length direction.

[0063] like Figure 13 and Figure 14As shown, a protruding plate 421 is formed by extending the second side edge 42 of the second sheet metal plate 2 into the first splicing surface 4, and the protruding plate 421 is located between the two extension plates 33. In the second sheet metal plate 2, the protruding plate 421 is formed by extending from the second side edge 42 of the second wall panel 21 into the area enclosed by the two extension plates and the second side edge. The second protrusion 34 of the second sheet metal plate 2 is provided on the protruding plate 421 and extends outward along the thickness direction of the protruding plate 421. It can be understood that this allows for better deformation of the second protrusion 34, facilitating the insertion and assembly of the second protrusion 34 with the corresponding second slot 32. In this embodiment, as... Figure 14 As shown, the second protrusion 34 is connected to the protrusion 421 via a connecting part 422 near the center of its side edge facing the protrusion 421. Therefore, a gap exists between the second protrusion 34 and the protrusion 421 in the area excluding the connecting part 422. This allows for better deformation of the second protrusion 34 in its thickness direction, further facilitating the insertion and assembly of the second protrusion 34 with the corresponding second slot 32.

[0064] Furthermore, when the first sheet metal plate 1 and the second sheet metal plate 2 are in a spliced ​​state, such as Figures 10-13 As shown, the outer wall surface of the protruding plate 421 abuts against the inner wall surface of the oppositely arranged wall panel. That is, the outer wall surface of the protruding plate 421 abuts against the inner wall surface of the first wall panel 11. In this way, the stress-bearing area at the splice in the width direction of the sheet metal structure is increased, stress concentration is reduced, and the reliability of the connection in the width direction of the sheet metal structure is improved.

[0065] Furthermore, the second sheet metal plate 2 has an opening 6 on its wall panel, which allows the groove wall of the second slot 32 to deform in the thickness direction of the second protrusion 34. This facilitates the insertion and assembly of the second protrusion 34 and the second slot 32. The aforementioned opening 6 can be located on the inner or outer side of the second slot 32.

[0066] This utility model also discloses a heat exchanger. The heat exchanger includes the aforementioned sheet metal structure. One of the first sheet metal plate 1 and the second sheet metal plate 2 has mounting holes for installing heat exchange tubes on its wall panel. In this embodiment, as... Figure 1 , Figure 3 , Figure 6 , Figure 8 and Figure 10 As shown, the second wall panel 21 of the second sheet metal plate 2 has multiple mounting holes 211 distributed thereon.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A sheet metal structure, comprising a first sheet metal plate (1) and a second sheet metal plate (2), wherein the first sheet metal plate (1) is spliced ​​together with the second sheet metal plate (2) via a connecting structure (3), and the surface where the first sheet metal plate (1) and the second sheet metal plate (2) are spliced ​​is defined as the splicing surface, characterized in that, The connecting structure (3) has at least two sets and is arranged at intervals along the length of the splicing surface. The connecting structure (3) includes a protrusion and a slot that are interlocked. One of the protrusion and slot is disposed on the splicing surface of the first sheet metal plate (1), and the other of the protrusion and slot is disposed on the splicing surface of the second sheet metal plate (2).

2. The sheet metal structure according to claim 1, characterized in that, The board containing the splicing surface with the slot is defined as a wall panel, the splicing surface extends along the width direction of the wall panel, and the splicing surface with the protrusion is defined as the first splicing surface (4).

3. The sheet metal structure according to claim 2, characterized in that, The width direction of the wall panel is defined as the first direction (A), and the length direction of the wall panel is defined as the second direction (B). The slots in at least two sets of the connecting structures (3) extend along the second direction (B) and are defined as the first slot (31); or, in two adjacent sets of the connecting structures (3), the slots in one set of the connecting structures (3) extend along the second direction (B) and are defined as the first slot (31), and the slots in the other set of the connecting structures (3) extend along the first direction (A) and are defined as the second slot (32).

4. The sheet metal structure according to claim 3, characterized in that, The connection structure (3) has three sets, in which the slots in two sets of the connection structure (3) are the first slots (31), and the slots in the other set of the connection structure (3) are the second slots (32). The second slots (32) are located between the two first slots (31), and the protrusions on the second sheet metal plate (2) that match the corresponding second slots (32) are interference-fitted into the second slots (32).

5. The sheet metal structure according to claim 4, characterized in that, The protrusion that matches the first slot (31) is defined as the first protrusion (331), and the protrusion that matches the second slot (32) is defined as the second protrusion (34). The first splicing surface (4) includes two first side edges (41) spaced apart along the first direction (A) and a second side edge (42) connected between the two first side edges (41). The second side edge (42) extends along the first direction (A). The first protrusion (331) is disposed on the corresponding first side edge (41), and the second protrusion (34) is disposed on the second side edge (42).

6. The sheet metal structure according to claim 5, characterized in that, Both first side edges (41) extend toward each other along the first direction (A) to form extension plates (33), and the first protrusion (331) is disposed on the corresponding extension plate (33); and / or, the second side edge (42) of the second sheet metal plate (2) extends toward the first splicing surface (4) to form a protrusion plate (421), and the second protrusion (34) of the second sheet metal plate (2) is disposed on the protrusion plate (421) and extends outward along the thickness direction of the protrusion plate (421).

7. The sheet metal structure according to claim 5, characterized in that, The second sheet metal plate (2) has an opening (6) on its wall panel that allows the groove wall of the second slot (32) to deform in the thickness direction of the second protrusion (34).

8. The sheet metal structure according to claim 6, characterized in that, When the first side edge (41) is provided with the extension plate (33) and the second side edge (42) is provided with the protruding plate (421), when the first sheet metal plate (1) and the second sheet metal plate (2) are in the splicing state, the outer wall surface of the extension plate (33) and the outer wall surface of the protruding plate (421) are both in contact with the inner wall surface of the oppositely arranged wall panel; and / or, the outer wall surface of the extension plate (33) is flush with the adjacent second side edge (42).

9. The sheet metal structure according to claim 6, characterized in that, The first protrusion (331) is flush with the second protrusion (34); and / or, the distance between the first protrusion (331) and the extension plate (33) along the second direction (B) is H1, and the distance between the second protrusion (34) and the second side edge (42) along the second direction (B) is H2, and the distances H1 and H2 satisfy: 0.8mm < H1 ≤ 2mm, 0.8mm < H2 ≤ 2mm.

10. The sheet metal structure according to any one of claims 2 to 9, characterized in that, The two short sides of the wall panel arranged opposite each other along its own length are the first short side (51) and the second short side (52). The slot is arranged close to the first short side (51). The first sheet metal plate (1) and the second sheet metal plate (2) both include the wall panel and the first splicing surface (4). The first splicing surface (4) is connected to the second short side (52) of the corresponding wall panel.

11. The sheet metal structure according to claim 10, characterized in that, The first sheet metal plate (1) and the second sheet metal plate (2) are at an angle to each other, and there are two of each of the first sheet metal plate (1) and the second sheet metal plate (2). The wall of the first sheet metal plate (1) is defined as the first wall (11), and the wall of the second sheet metal plate (2) is defined as the second wall (21). The length of the second wall (21) is less than the length of the first wall (11). The two first sheet metal plates (1) are arranged relatively at intervals along the length direction of the second wall (21), and the two second sheet metal plates (2) are arranged relatively at intervals along the length direction of the first wall (11). The two ends of each first sheet metal plate (1) are connected to the corresponding second sheet metal plate (2) through the connecting structure (3). The sheet metal structure is formed by sequentially and alternately splicing the first sheet metal plate (1) and the second sheet metal plate (2).

12. The sheet metal structure according to claim 11, characterized in that, The distance between the inner walls of the two first wall panels (11) is L, the distance between the slot furthest from the first short side (51) and the second short side (52) is L1, the wall thickness of the first sheet metal plate (1) is h, and L, L1 and h satisfy: h+L≤L1≤2h+L.

13. A heat exchanger, comprising a sheet metal structure, characterized in that, The sheet metal structure is the sheet metal structure according to any one of claims 1 to 12, and a mounting hole (211) for mounting heat exchange tubes is provided on the wall panel of one of the first sheet metal plate (1) and the second sheet metal plate (2).

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