Fin heat exchanger
By employing a design that combines straight and bent sections in the finned heat exchanger, and controlling the length of the straight sections within a specific range, the problems of looseness and misalignment between fins are solved, thereby improving the structural robustness and heat exchange performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHUHAI DUNAN THERMAL TECH CO LTD
- Filing Date
- 2020-09-28
- Publication Date
- 2026-07-21
AI Technical Summary
When the combined length of existing finned heat exchangers is not appropriate, the fins are prone to loosening and misalignment, which leads to increased wind-side resistance and reduced heat exchange performance.
The design combines straight and bent sections. The straight sections have evenly spaced integrated fins, while the bent sections have evenly spaced split fins. By controlling the length L of the straight sections within the range of [A-(R+N*F)]/2≤L≤A-(R+N*F), the structure is ensured to be robust and not easily deformed, while also enhancing heat exchange performance.
This results in a more robust structure for the finned heat exchanger, making it less prone to deformation, reducing wind-side resistance, and improving heat exchange performance.
Smart Images
Figure CN114279239B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of heat exchanger technology, and more particularly to a finned heat exchanger. Background Technology
[0002] Current finned heat exchangers use a single-row finned bending structure, which is stacked together and formed into an integral structure by fixing the end plates at both ends, or multiple rows of integral bending are used, with some being integral fins, thereby achieving the function of heat exchange.
[0003] However, when using integral fins, if the combined length is too large, the bending part will not be able to fully utilize the integral fins due to differences in radius and length; if the combined length is too small, the structure between the fins will be loose and unreliable, and gaps and misalignments will easily appear between the rows after bending, increasing wind-side resistance; and when there are many rows, the heat exchange performance will be greatly reduced. Summary of the Invention
[0004] In view of this, and to address the aforementioned technical problems, it is necessary to provide a finned heat exchanger that is more robust, less prone to deformation, and has higher heat exchange performance.
[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:
[0006] A finned heat exchanger includes a straight section and a bent section, the straight section being connected to the bent section; the straight section has a plurality of integral fins evenly distributed at intervals, and the bent section has a plurality of rows of split fins evenly distributed at intervals; the overall length of the finned heat exchanger after bending is A, the length of the straight section is L, the width of the split fins is F, the number of split fins in each row is N, and the bending radius of the bent section is R, and the relationship between A, L, F, N, and R is as follows: [A-(R+N*F)] / 2≤L≤A-(R+N*F).
[0007] In this application, the length of the straight segment is L. When using integrated fins, if the combined length L > A - (R + N * F), the bending segment will cause the integrated fins to be underutilized due to differences in radius and length. If the combined length L < [A - (R + N * F)] / 2, the structure between the fins of the finned heat exchanger will be loose and unreliable, and gaps and misalignments will easily appear between the rows after bending, increasing the air resistance. Therefore, the length of the straight segment is: [A - (R + N * F)] / 2 ≤ L ≤ A - (R + N * F). This setting makes the structure of the finned heat exchanger robust and less prone to deformation, while also enhancing the heat exchange performance.
[0008] In one embodiment, the finned heat exchanger is U-shaped, and the two ends of the straight segment are respectively connected to bent segments, wherein L≤A-2*(R+N*F).
[0009] With this configuration, when L>A-2*(R+N*F), the bending section will not be able to fully utilize the integrated fins due to the difference in radius and length. At the same time, since the straight section is the main stress-bearing part in the bending process, placing the straight section between the bending sections can distribute the stress, thereby reducing the deformation caused by concentrated stress.
[0010] In one embodiment, the finned heat exchanger is U-shaped, and there are two bending sections. The two ends of the two bending sections are respectively connected to the corresponding straight sections, wherein L≤A-2*(R+N*F).
[0011] This design increases the number of straight segments, further strengthening the structure of the finned heat exchanger and reducing the stress on each straight segment, making it less prone to deformation and enhancing heat exchange performance.
[0012] In one embodiment, the finned heat exchanger is G-shaped, and the straight section is connected to the bent section.
[0013] This design eliminates the gaps caused by the use of separate fin connections, thereby avoiding increased wind resistance and performance degradation due to fin misalignment.
[0014] In one embodiment, the finned heat exchanger further includes a connector and multiple end plates, the multiple end plates being connected to one end of the bent section and connected in series via the connector.
[0015] This configuration allows the end plates to be tightly connected, further strengthening the structural rigidity between the split fins in the bending section, thereby reducing loosening between the split fins and enhancing heat exchange performance.
[0016] In one embodiment, the end plate is a sheet metal part.
[0017] This design results in low cost, high strength, and high stamping quality for sheet metal parts.
[0018] In one embodiment, the finned heat exchanger further includes multiple heat exchange tubes, which are inserted between the split fins and the integral fins.
[0019] This configuration enhances heat exchange performance.
[0020] In one embodiment, when the spacing between the sides of the multiple rows of split fins is 2mm-2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.115mm.
[0021] In one embodiment, when the spacing between the sides of the multiple rows of split fins is greater than 2.5 mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.13 mm.
[0022] With this configuration, the excessive spacing between the sides of the split fins will lead to large gaps, increasing wind resistance and reducing heat exchange performance. Therefore, the split fins can be thickened to prevent deformation after bending and improve heat exchange performance.
[0023] In one embodiment, the split fins are windowed fins, and when the spacing between the sides of the distributed fins is greater than 1.8 mm, the split fins on the heat exchange tube with the longest arc length of the bending section are corrugated fins.
[0024] This design replaces the split-type fins, which are prone to collapsing when bent, with corrugated fins to enhance structural strength and improve heat exchange performance.
[0025] Compared with the prior art, the finned heat exchanger provided in this application has a straight section length of L. When using integrated fins, if the combined length L > A - (R + N * F), the bending section will not be able to fully utilize the integrated fins due to differences in radius and length. If the combined length L < [A - (R + N * F)] / 2, the structure between the fins of the finned heat exchanger will be loose and unreliable, and gaps and misalignments will easily appear between the rows after bending, increasing the air-side resistance. Therefore, the length of the straight section is: [A - (R + N * F)] / 2 ≤ L ≤ A - (R + N * F). This setting makes the structure of the finned heat exchanger more robust and less prone to deformation, while also enhancing the heat exchange performance. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the finned heat exchanger provided in this application.
[0027] Figure 2 for Figure 1 A schematic diagram of a finned heat exchanger after bending.
[0028] Figure 3 A schematic diagram of a U-shaped finned heat exchanger in another embodiment provided in this application.
[0029] Figure 4 A schematic diagram of a U-shaped finned heat exchanger in another embodiment provided in this application.
[0030] Figure 5 A schematic diagram of a G-type finned heat exchanger in another embodiment provided in this application.
[0031] Figure 6 This is a schematic diagram from one perspective showing the connection between the connector provided in this application and the end plate.
[0032] In the diagram, 100 is the finned heat exchanger; 10 is the straight section; 11 is the integrated fin; 20 is the bent section; 21 is the split fin; 30 is the connector; 40 is the end plate; and 50 is the heat exchange tube. Detailed Implementation
[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0034] It should be noted that when a component is said to be "mounted on" another component, it can be directly mounted on the other component or may be interspersed with a component. When a component is said to be "set on" another component, it can be directly set on the other component or may be interspersed with a component. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or may be interspersed with a component.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.
[0036] like Figures 1-6 As shown, the present invention provides a finned heat exchanger 100 for exchanging heat with the outside environment.
[0037] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of a finned heat exchanger 100 according to one embodiment of the present invention. Figure 2 for Figure 1A schematic diagram of the finned heat exchanger 100 after bending. The finned heat exchanger 100 includes a straight section 10 and a bent section 20. The straight section 10 and the bent section 20 are connected. The straight section 10 has multiple integrated fins 11 evenly distributed at intervals, and the bent section 20 has multiple rows of split fins 21 evenly distributed at intervals. It can be understood that combining the integrated fins 11 and the split fins 21 enhances the overall performance of the finned heat exchanger 100, making the structure robust and not loose. At the same time, the overall length of the finned heat exchanger 100 after bending is A, the length of the straight section 10 is L, the width of the split fins is F, the number of split fins in each row is N, and the bending radius of the bent section 20 is R. The relationship between A, L, F, N, and R is as follows: [A-(R+N*F)] / 2≤L≤A-(R+N*F); the maximum value of the length L of the straight section 10 is the starting point of the arc of the bent section 20.
[0038] It needs to be explained that when using the integrated fin 11, if its combined length L > A - (R + N * F), the bending section 20 will not be able to fully utilize the integrated fin 11 due to the difference in radius and length; if its combined length L < [A - (R + N * F)] / 2, the structure between the fins of the finned heat exchanger 100 will be loose and unreliable, and gaps and misalignments will easily appear between the rows after bending, increasing the wind-side resistance; therefore, the length of the straight section 10 is: [A - (R + N * F)] / 2 ≤ L ≤ A - (R + N * F). This setting makes the structure of the finned heat exchanger 100 more robust and less prone to deformation, and at the same time, it can enhance the heat exchange performance of the finned heat exchanger 100.
[0039] In one embodiment, when L is set to 120mm, and A = 227.7mm, F = 12.7mm, N = 1, and R = 65mm, substituting these data into the formula: [A-(R+N*F)] / 2≤L≤A-(R+N*F), the resulting value range should be: 75mm≤L≤150mm. This results in a more robust structure that is less prone to loosening and has better heat exchange performance. Therefore, the setting of L conforms to this range. Furthermore, L can also be set to other lengths, such as 100mm, 130mm, or 150mm. The structure is most robust when L is set to 150mm, as L is the starting point of the 20mm arc of the bending segment.
[0040] In another embodiment, when L is set to 180mm, and A = 316.4mm, F = 18.2mm, N = 2, R = 80mm, substituting these data into the formula: [A-(R+N*F)] / 2≤L≤A-(R+N*F), the resulting value range should be: 100mm≤L≤200mm. This results in a more robust structure that is less prone to loosening and has better heat exchange performance. Therefore, the setting of L conforms to this range. In this case, L can also be set to other lengths, such as 160mm, 190mm, or 200mm. The structure is most robust when L is set to 200mm, as L is the starting point of the 20mm arc of the bending segment.
[0041] In another embodiment, when L is set to 250mm, and A = 442.15mm, F = 19.05mm, N = 3, R = 85mm, substituting these data into the formula: [A-(R+N*F)] / 2≤L≤A-(R+N*F), the resulting value range should be: 150mm≤L≤300mm. This results in a more robust structure that is less prone to loosening and has better heat exchange performance. Therefore, the setting of L conforms to this range. Furthermore, L can also be set to other lengths, such as 200mm, 260mm, or 300mm. The structure is most robust when L is set to 300mm, as L is the starting point of the 20mm arc of the bending segment.
[0042] In another embodiment, when L is set to 350mm, and A = 586.6mm, F = 21.65mm, N = 4, R = 100mm, substituting these data into the formula: [A-(R+N*F)] / 2≤L≤A-(R+N*F), the resulting value range should be: 200mm≤L≤400mm. This results in a more robust structure that is less prone to loosening and has better heat exchange performance. Therefore, the setting of L conforms to this range. Furthermore, L can also be set to other lengths, such as 250mm, 300mm, or 400mm. The structure is most robust when L is set to 400mm, as L is the starting point of the 20mm arc of the bending segment.
[0043] In one embodiment, please refer to Figure 3 , Figure 3 This is a schematic diagram of the finned heat exchanger 100 in this embodiment. The finned heat exchanger 100 is U-shaped, with bent sections 20 connected to both ends of the straight section 10, where L≤A-2*(R+N*F). It should be explained that when L>A-2*(R+N*F), the bent sections 20 will not be able to fully utilize the integral fins 11 due to differences in radius and length. At the same time, since the straight section 10 is the main stress-bearing part during the bending process, placing the straight section 10 between the bent sections 20 can distribute the stress, thereby reducing the deformation of the straight section 10 caused by concentrated stress.
[0044] Preferably, please refer to Figure 4 , Figure 4 The diagram below shows a U-shaped finned heat exchanger 100 with two bent sections 20. The two ends of each bent section 20 are connected to corresponding straight sections 10, where L ≤ A - 2*(R + N*F). The increased number of straight sections 10 in the U-shaped finned heat exchanger 100 further strengthens the structure of the finned heat exchanger 100 and reduces the stress on each straight section 10, making it less prone to deformation and enhancing heat exchange performance.
[0045] In another embodiment, please refer to Figure 5 , Figure 5 This is a schematic diagram of the finned heat exchanger 100 in this embodiment. The finned heat exchanger 100 is G-shaped and uses a straight segment 10. The straight segment 10 is connected to the bent segment 20 to form the G-shaped finned heat exchanger 100, thereby eliminating the gaps caused by the use of split fins 21 for connection, thus avoiding the increase in wind resistance and performance degradation caused by fin misalignment. Of course, in other embodiments, the G-shaped finned heat exchanger 100 may not be limited to using a single straight segment 10, such as two, three or four.
[0046] like Figure 6 As shown, the finned heat exchanger 100 also includes multiple end plates 40, which are connected to one end of the bent section 20 to enhance the rigidity of the bent section 20. Some end plates 40 can also be connected to one end of the straight section 10 to further fix the integral fins 11 of the straight section 10. When the sheet metal part on the side of the straight section 10 needs to enlarge the original round hole, if the straight section 10 uses split fins 21, it is easy for the split fins 21 to loosen. Using integral fins 11 makes it less likely to loosen.
[0047] Furthermore, the finned heat exchanger 100 also includes multiple connectors 30, and multiple end plates 40 are connected in series through multiple connectors 30. The connectors 30 are used to connect adjacent end plates 40. Connecting the end plates 40 in series can further strengthen the structural rigidity between the split fins 21 of the bending section 20, eliminate the gap between the split fins 21, thereby reducing the looseness between the split fins 21 and further enhancing the heat exchange performance.
[0048] Preferably, the end plate 40 is a sheet metal part, which has low cost, high strength and high stamping quality.
[0049] Specifically, the finned heat exchanger 100 also includes multiple heat exchange tubes 50, which are inserted between the split fins 21 and the integrated fins 11 to better enhance the heat exchange performance.
[0050] In one embodiment, the longest arc length of the bending section 20 is L1, where L1 = 2*π*(R+N*FF / 2) / 4. When the spacing between the sides of the multi-row split fins 21 is 2mm-2.5mm, the thickness of the split fins 21 on the heat exchange tube 50 with the longest arc length of the bending section 20 is greater than 0.115mm; when the thickness is less than 0.115mm, the split fins 21 will become loose due to excessive wind resistance, and the structure will be unreliable. Therefore, it is thickened to prevent deformation after bending and further improve the heat exchange performance.
[0051] In another embodiment, when the spacing between the sides of the multi-row split fins 21 is greater than 2.5 mm, the thickness of the split fins 21 on the heat exchange tube 50 with the longest arc length of the bending section 20 is greater than 0.13 mm; when the thickness is less than 0.13 mm, the gaps will be too large due to the excessive spacing between the sides of the split fins 21, which will increase the wind-side resistance and reduce the heat exchange performance; therefore, the split fins 21 can be thickened so that they are not easily deformed after bending, thereby improving the heat exchange performance.
[0052] In another embodiment, when the split fin 21 is a windowed fin and the spacing between the sides of the distributed fins is greater than 1.8 mm, the split fin 21 on the heat exchange tube 50 with the longest arc length of the bending section 20 is a corrugated fin. Since the split fin 21 is a windowed fin that is prone to collapsing when bent, it is replaced with a corrugated fin to enhance the structural strength and improve the heat exchange performance.
[0053] The finned heat exchanger 100 proposed in this application has a straight section 10 with a length of L. When using integrated fins 11, if the combined length L > A - (R + N * F), the bending section 20 will not be able to fully utilize the integrated fins 11 due to differences in radius and length. If the combined length L < [A - (R + N * F)] / 2, the structure between the fins of the finned heat exchanger 100 will be loose and unreliable, and gaps and misalignments will easily appear between the rows after bending, increasing the air resistance. Therefore, the length of the straight section 10 is: [A - (R + N * F)] / 2 ≤ L ≤ A - (R + N * F). This setting makes the structure of the finned heat exchanger 100 more robust and less prone to deformation, while also enhancing the heat exchange performance.
[0054] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.
[0055] 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.
[0056] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any appropriate changes and variations made to the above embodiments within the essential spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. A finned heat exchanger, comprising a straight section and a bent section, wherein the straight section and the bent section are connected; the straight section has a plurality of integral fins evenly distributed at intervals, and the bent section has a plurality of rows of split fins evenly distributed at intervals. Its features are, The overall length of the finned heat exchanger after bending is A, the length of the straight segment is L, the width of the split fins is F, the number of split fins in each row is N, and the bending radius of the bent segment is R. The relationship between A, L, F, N, and R is as follows: ; The longest arc length of the bending segment is L1, where When the spacing between the sides of the multiple rows of split fins is 2mm-2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.115mm; when the spacing between the sides of the multiple rows of split fins is greater than 2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.13mm.
2. A finned heat exchanger, comprising a straight section and a bent section, wherein the straight section and the bent section are connected; the straight section has a plurality of integral fins evenly distributed at intervals, and the bent section has a plurality of rows of separate fins evenly distributed at intervals, characterized in that, The finned heat exchanger is U-shaped, with bent sections connected to both ends of the straight section. The overall length of the finned heat exchanger after bending is A, the length of the straight section is L, the width of the split fins is F, the number of split fins in each row is N, and the bending radius of the bent section is R. The relationships between A, L, F, N, and R are as follows: ; The longest arc length of the bending segment is L1, where When the spacing between the sides of the multiple rows of split fins is 2mm-2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.115mm; when the spacing between the sides of the multiple rows of split fins is greater than 2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.13mm.
3. A finned heat exchanger, comprising a straight section and a bent section, wherein the straight section and the bent section are connected; the straight section has a plurality of integral fins evenly distributed at intervals, and the bent section has a plurality of rows of separate fins evenly distributed at intervals, characterized in that, The finned heat exchanger is U-shaped, with two bent sections. Each bent section has two ends connected to a corresponding straight section. The overall length of the finned heat exchanger after bending is A, the length of each straight section is L, the width of each split fin is F, the number of split fins in each row is N, and the bending radius of each bent section is R. The relationships between A, L, F, N, and R are as follows: ; The longest arc length of the bending segment is L1, where When the spacing between the sides of the multiple rows of split fins is 2mm-2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.115mm; when the spacing between the sides of the multiple rows of split fins is greater than 2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.13mm.
4. A finned heat exchanger, comprising a straight section and a bent section, wherein the straight section and the bent section are connected; the straight section has a plurality of integral fins evenly distributed at intervals, and the bent section has a plurality of rows of separate fins evenly distributed at intervals, characterized in that, The finned heat exchanger is G-shaped, with the straight section connected to the bent section. The overall length of the finned heat exchanger after bending is A, the length of the straight section is L, the width of the split fins is F, the number of split fins in each row is N, and the bending radius of the bent section is R. The relationship between A, L, F, N, and R is as follows: ; The longest arc length of the bending segment is L1, where When the spacing between the sides of the multiple rows of split fins is 2mm-2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.115mm; when the spacing between the sides of the multiple rows of split fins is greater than 2.5mm, the thickness of the split fins on the heat exchange tube with the longest arc length of the bending section is greater than 0.13mm.
5. The finned heat exchanger according to claim 1, characterized in that, The finned heat exchanger also includes a connector and multiple end plates, which are connected to one end of the bent section and are connected in series through the connector.
6. The finned heat exchanger according to claim 5, characterized in that, The end plate is a sheet metal part.
7. The finned heat exchanger according to claim 1, characterized in that, The finned heat exchanger also includes multiple heat exchange tubes, which are inserted between the split fins and the integrated fins.
8. The finned heat exchanger according to claim 1, characterized in that, When the split fins are windowed and the spacing between the sides of the split fins is greater than 1.8 mm, the split fins on the heat exchange tube with the longest arc length of the bending section are corrugated fins.