Fin and heat exchanger having the same

Abstract

The application provides a fin and a heat exchanger with the same, the fin comprising: a first connecting section, a second connecting section and a third connecting section, the second connecting section being used for bending, the second connecting section having oppositely arranged first and second connecting ends, the first connecting end being arranged on the side of the second connecting end away from the third connecting section; along the length direction of the second connecting section, the second connecting section is in a straight strip structure before bending, and is in an arc strip structure after bending; the first, second and third connecting sections are all in a corrugated structure, the first connecting section has a first wave distance Fp1, the second connecting section has a second wave distance Fp2, and the third connecting section has a third wave distance Fp3; wherein, Fp2>Fp1 and Fp2>Fp3. Through the technical scheme provided by the application, the technical problem that the fin is inconvenient to bend in the prior art can be solved, the heat exchange performance of the product can be improved, the heat exchange area can be increased, and the corrosion resistance of the product can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fin bending, in particular to a fin and a heat exchanger with the same. BACKGROUND

[0002] At present, some heat exchangers in the prior art have a bending section, and the flat tube of the heat exchanger is twisted in a bending reserved area to realize the bending of the flat tube. In order to avoid the inconvenience of bending the fin and the instability of the fin in the bending, generally no fin is arranged in the bending reserved area of the flat tube, so that a fin-free area is formed in the bending section of the heat exchanger.

[0003] However, a large gap will appear in the fin-free area, causing air leakage, affecting the heat exchange performance, and reducing the corrosion resistance of the fin. SUMMARY

[0004] The main purpose of the present application is to provide a fin and a heat exchanger with the same, so as to solve the technical problem of inconvenience in bending the fin in the prior art.

[0005] In order to achieve the above purpose, according to one aspect of the present application, a fin is provided, comprising: a first connecting section, a second connecting section and a third connecting section, the second connecting section being arranged between the first connecting section and the third connecting section, the second connecting section being used for bending, the second connecting section having a first connecting end and a second connecting end arranged oppositely, the first connecting end being arranged on the side of the second connecting end away from the third connecting section; the extension direction from the first connecting end to the second connecting end being the length direction of the second connecting section; along the length direction of the second connecting section, the second connecting section is a straight strip structure before bending and an arc-shaped strip structure after bending; the first connecting section, the second connecting section and the third connecting section are all corrugated structures, the first connecting section has a first wave distance Fp1, the second connecting section has a second wave distance Fp2, and the third connecting section has a third wave distance Fp3; wherein Fp2>Fp1 and Fp2>Fp3.

[0006] Further, the length direction of the second connecting section and the height direction of the second connecting section are both perpendicular to the width direction of the second connecting section, the width of the second connecting section along the width direction of the second connecting section is Fw2, the width of the first connecting section is Fw1, and the width of the third connecting section is Fw3; wherein Fw1=Fw2=Fw3.

[0007] Further, the length of the second connecting section is BL, and the width of the second connecting section is Fw2; wherein 1.5Fw2≤BL≤5.5Fw2.

[0008] Further, the width of the second connecting section is Fw2, and the bending radius of the second connecting section is R 弯 ; wherein 2Fw2≤R 弯≤7Fw2.

[0009] Furthermore, the first connecting segment is spaced apart from the second connecting segment; and / or, the third connecting segment is spaced apart from the second connecting segment.

[0010] Furthermore, the height of the first connecting segment is Fh1, the height of the second connecting segment is Fh2, and the height of the third connecting segment is Fh3; where Fh2≤Min(Fh1,Fh3).

[0011] Furthermore, Fp1 = Fp3.

[0012] Furthermore, Fh1 = Fh3.

[0013] According to another aspect of the present invention, a heat exchanger is provided, the heat exchanger comprising the fins provided above.

[0014] Furthermore, the heat exchanger also includes: an inlet manifold, located at one end of the fins, with a radius of R1; and an outlet manifold, located at the other end of the fins, with a radius of R2; wherein, Fw2 < R1 < R2.

[0015] By applying the technical solution of this invention, and by making the second wave pitch greater than the first wave pitch and the second wave pitch greater than the third wave pitch, a sparse fin region is formed in the second connecting section. The fin corrugations at the second connecting section are gently bent, facilitating bending and avoiding excessive force during bending, thus preventing damage to the fins in the second connecting section. Therefore, the fins provided in this embodiment can solve the technical problem of inconvenient fin bending in the prior art. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A front view of a finned heat exchanger provided according to an embodiment of the present invention is shown before bending.

[0018] Figure 2 A top view of a finned heat exchanger provided according to an embodiment of the present invention is shown before bending.

[0019] Figure 3 A schematic diagram of a first connecting segment with a window structure provided according to an embodiment of the present invention is shown;

[0020] Figure 4 A schematic diagram of a second connecting segment with a window structure according to an embodiment of the present invention is shown;

[0021] Figure 5 A structural schematic view of a second connecting section provided with a window structure according to another embodiment of the present application is shown;

[0022] Figure 6 A structural schematic view of a second connecting section provided with a window structure according to another embodiment of the present application is shown;

[0023] Figure 7 A structural schematic view of a heat exchanger with fins after being bent into a double-row structure according to an embodiment of the present application is shown;

[0024] Figure 8 A partial enlarged schematic view of Figure 7 is shown;

[0025] Figure 9 A structural schematic view of a heat exchanger with fins after being bent into a double-row structure according to an embodiment of the present application is shown;

[0026] Figure 10 A front view of a heat exchanger with fins after being bent into a double-row structure according to an embodiment of the present application is shown;

[0027] Figure 11 A structural schematic view of a heat exchanger with fins after being bent into an A-shaped structure according to an embodiment of the present application is shown;

[0028] Figure 12 A front view of a heat exchanger with fins after being bent into an A-shaped structure according to an embodiment of the present application is shown;

[0029] Figure 13 A left view of a heat exchanger with fins after being bent into an A-shaped structure according to an embodiment of the present application is shown.

[0030] Among the above drawings, the following reference signs are included:

[0031] 10, fin; 11, first connecting section; 12, second connecting section; 13, third connecting section; 14, window structure; 20, inlet header; 30, outlet header; 40, heat exchange flat tube. DETAILED DESCRIPTION

[0032] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] As Figures 1 to 6As shown, the embodiment one of the present application provides a fin 10, the fin 10 includes a first connecting section 11, a second connecting section 12 and a third connecting section 13, the second connecting section 12 is located between the first connecting section 11 and the third connecting section 13, the second connecting section 12 is used for bending, the second connecting section 12 has oppositely arranged first connecting end and second connecting end, the first connecting end is located on the side away from the third connecting section 13 of the second connecting end; the extension direction along the first connecting end to the second connecting end is the length direction of the second connecting section 12. Along the length direction of the second connecting section 12, the second connecting section 12 is a straight strip structure before bending, and the second connecting section 12 is an arc strip structure after bending; the first connecting section 11, the second connecting section 12 and the third connecting section 13 are all corrugated structures, the first connecting section 11 has a first wave distance Fp1, the second connecting section 12 has a second wave distance Fp2, and the third connecting section 13 has a third wave distance Fp3; wherein, Fp2>Fp1, Fp2>Fp3.

[0034] By using the fin 10 provided by the embodiment, the second wave distance is greater than the first wave distance, and the second wave distance is greater than the third wave distance, so that the second connecting section 12 forms a sparse fin area, the corrugated bending of the fin 10 at the second connecting section 12 is gentle, the process processing difficulty is reduced, the bending is facilitated, the stress is avoided to be large when bending due to the large bending degree of the fin 10, and the damage to the fin 10 of the second connecting section 12 is avoided. In addition, the air side heat exchange area can be improved by the second connecting section 12, and thus the heat exchange capacity of the overall heat exchanger is improved. Therefore, by using the fin 10 provided by the embodiment, the technical problem that the fin 10 is not convenient to bend in the prior art can be solved.

[0035] It should be noted that when bending, the bending roller is in contact with the heat exchange flat tube 40 of the heat exchanger, the heat exchange flat tube 40 is bent and curved into a U-shaped structure, and the heat exchange flat tube 40 has a certain torsional deformation at the U-shaped portion, so that the plate body of the plate-shaped heat exchange flat tube 40 can form effective shielding. At the same time, the heat exchange flat tube 40 drives the fin 10 connected with the heat exchange flat tube 40 to bend, specifically, the second connecting section 12 is bent, and the second connecting section 12 is bent into a U-shaped structure, and the second connecting section 12 has a certain torsional deformation, so that the second connecting section 12 can form effective shielding. As shown, Figures 7 to 10 As shown, the heat exchanger is bent into a double-row structure. Or as shown, Figures 11 to 13 As shown, the heat exchanger is bent into an A-shaped structure.

[0036] Preferably, in the embodiment, 2Fp1Fp2≤6Fp1, 2Fp1Fp2≤6Fp1, so that the second connecting section 12 is within a suitable range, and the second connecting section 12 is convenient to bend.

[0037] It should be noted that after the second connecting section 12 is bent, the second connecting section 12 will be partially twisted, and the adjacent two pieces will also be collapsed.

[0038] In the embodiment, the length direction of the second connecting section 12 and the height direction of the second connecting section 12 are both perpendicular to the width direction of the second connecting section 12, the width of the second connecting section 12 along the width direction of the second connecting section 12 is Fw2, the width of the first connecting section 11 is Fw1, and the width of the third connecting section 13 is Fw3; wherein Fw1=Fw2=Fw3. By adopting such a structure, the production and manufacturing are facilitated, and the production difficulty is reduced.

[0039] Specifically, the length of the second connecting section 12 in the embodiment is BL (BL is the abbreviation of Bending Length), and the width of the second connecting section 12 is Fw2; wherein 1.5Fw2≤BL≤5.5Fw2. By adopting such a structure, the second connecting section 12 can have sufficient extension length, so as to facilitate the bending of the second connecting section 12, facilitate the production and manufacturing. Specifically, when the length is less than 1.5Fw2, the fin 10 is prone to be damaged during bending; when the length is greater than 5.5Fw2, the second connecting section 12 (the second connecting section 12 can be understood as a sparse fin section) is too long, which will affect the heat exchange capacity per unit area of the fin 10, and the heat exchange capacity will be reduced. Specifically, Fw is the abbreviation of Fin Width, and Tw is the abbreviation of Tube width, which represent the width value respectively.

[0040] In the embodiment, the width of the second connecting section 12 is Fw2, and the bending radius of the second connecting section 12 is R 弯 ; wherein 2Fw2≤R 弯 ≤7Fw2. By adopting such a structure, the second connecting section 12 can be effectively bent, avoiding the inconvenience of bending due to too small bending radius, and avoiding the influence of overall layout due to too large bending radius. At the same time, by setting in this size range, the difficulty of process processing can be reduced.

[0041] Specifically, the first connecting section 11 and the second connecting section 12 can be spaced apart, so that the second connecting section 12 can have a certain expansion space in the gap between the first connecting section 11 and the second connecting section 12 when being bent, avoiding the deformation limitation of the first connecting section 11 on the second connecting section 12, facilitating the bending deformation of the part of the second connecting section 12 close to the first connecting section 11. Alternatively, the third connecting section 13 and the second connecting section 12 can be spaced apart, so that the second connecting section 12 can have a certain expansion space in the gap between the third connecting section 13 and the second connecting section 12 when being bent, avoiding the deformation limitation of the third connecting section 13 on the second connecting section 12, facilitating the bending deformation of the part of the second connecting section 12 close to the third connecting section 13. Alternatively, the first connecting section 11 and the third connecting section 13 can be spaced apart from the second connecting section 12, so that the second connecting section 12 can have a certain expansion space in the gap between the first connecting section 11 and the second connecting section 12 and the gap between the third connecting section 13 and the second connecting section 12 when being bent, avoiding the deformation limitation of the first connecting section 11 and the third connecting section 13 on the second connecting section 12, facilitating the overall deformation of the second connecting section 12.

[0042] Preferably, the first connecting section 11 and the third connecting section 13 in the embodiment are spaced apart from the second connecting section 12, facilitating the bending deformation of the second connecting section 12. Specifically, the distance between the first connecting section 11 and the second connecting section 12 is Gap1, and the distance between the third connecting section 13 and the second connecting section 12 is Gap2.

[0043] In the embodiment, the first connecting section 11 and the second connecting section 12 can have a first gap Gap1 therebetween, and the second connecting section 12 and the third connecting section 13 can have a second gap Gap2 therebetween; wherein Gap1>0; and / or, Gap2>0.

[0044] Specifically, the height of the first connecting section 11 is Fh1, the height of the second connecting section 12 is Fh2, and the height of the third connecting section 13 is Fh3; wherein Fh2≤Min(Fh1, Fh3), that is, Fh2 is less than the minimum of Fh1 and Fh3. With such a structure, it is convenient to form a height difference between the second connecting section 12 and the first connecting section 11, or between the second connecting section 12 and the third connecting section 13, and the height difference also facilitates the bending of the second connecting section 12. At the same time, the second connecting section 12 is not completely welded to the flat tube (at this time, the first connecting section 11 and / or the third connecting section 13 can be connected to the second connecting section 12 to ensure the stability of the second connecting section 12), thereby facilitating bending.

[0045] Specifically, Fp1=Fp3. With such a structure, the first connecting section 11 and the third connecting section 13 are formed in the same structure, facilitating production.

[0046] Specifically, Fh1=Fh3. With such a structure, the first connecting section 11 and the third connecting section 13 are formed in the same structure, facilitating production.

[0047] In the first embodiment, the fin 10 is an integral fin 10 integrated with the body heat exchanger, but in order to facilitate process processing and production, Fp2>Fp1 and Fp2>Fp3 are generally true, and Fp1=Fp3. In order to facilitate process processing and production, Fw1=Fw2=Fw3=Tw and Gap1≥0 and Gap2≥0 are generally true.

[0048] In order to facilitate process bending, a large number of experiments prove that 1.5Tw≤BL (the length of the sparse fin area or the length of the bending area) ≤5.5Tw is the best range.

[0049] The product bending radius and the flat tube width have a certain relationship, and satisfy 2Tw≤Rbend (bending radius) ≤7Tw.

[0050] The bending angle θ of the product after bending can be within the range of 0° to 180°.

[0051] The height Fh2 of the fin 10 in the sparse fin area is less than or equal to Fh1 and Fh2≤Fh3. Since the height of the fin 10 is reduced, the welding rate of the middle bending sparse fin area is reduced or the fin 10 is not completely welded to the flat tube.

[0052] In this way, the windward area of the product can be increased, the bending area also has the fin 10 to enhance heat exchange, and the overall heat exchange capacity is strengthened; the product corrosion resistance is improved (there is no bare flat tube without fins), the product life is prolonged, and the reliability is improved. The overall product appearance is guaranteed. The overall fin 10 facilitates one-time processing of the fin 10 by the equipment; the product is bent in the sparse fin area, and the bending feasibility is high, and a certain angle or folding can be achieved.

[0053] In the second embodiment, the heights of the two side fins 10 are consistent, the two side fin distances are consistent, and the height of the middle fin 10 is reduced.

[0054] Fp2>Fp1 and Fp2>Fp3, and Fp1=Fp3; Fw2<Fw1=Fw3 and GAP1≥0 and GAP2≥0.

[0055] In the third embodiment, the heights of the two side fins 10 are consistent, the two side fin distances are consistent, and the height of the middle fin 10 is increased.

[0056] Fp2 > Fp1 and Fp2 > Fp3, while Fp1 = Fp3; Fw2 < Fw1 = Fw3.

[0057] In the fourth embodiment, the heights of the two fins 10 are not the same, the fin spacing on both sides is the same, and the height of the middle fin 10 is less than or equal to the height of the lowest fin 10 on either side.

[0058] Fp2 > Fp1 and Fp2 > Fp3, while Fp1 = Fp3; Fw2 ≤ Min(Fw1, Fw3).

[0059] In the fifth embodiment, the heights of the two fins 10 are not the same, the fin spacing on both sides is the same, and the height of the middle fin 10 is greater than or equal to the height of the highest fin 10 on either side.

[0060] Fp2 > Fp1 and Fp2 > Fp3, while Fp1 = Fp3; Fw2 ≥ Max(Fw1, Fw3).

[0061] In the sixth embodiment: the heights of the two fins 10 are not the same, the fin spacing on both sides is the same, and the height of the middle fin 10 is greater than that of the lowest fin 10 on both sides but less than that of the highest fin 10.

[0062] Fp2 > Fp1 and Fp2 > Fp3, while Fp1 = Fp3; Min(Fw1,Fw3) < Fw2 < Max(Fw1,Fw3).

[0063] In the seventh embodiment: it meets the requirements of any of the above alternative solutions, and the inconsistent spacing between the two sides is also within the scope of protection of this patent.

[0064] Fp2 > Fp1 and Fp2 > Fp3, while Fp1 > Fp3 or Fp1 < Fp3.

[0065] In the eighth embodiment: the fins 10 in the bending region gradually become sparse from the middle to both ends to accommodate the amount of deformation in the bending region.

[0066] like Figures 3 to 6 As shown in the attached figures (the Tw direction represents the width direction of the fin 10), in all the above embodiments, the first connecting segment 11, the second connecting segment 12, and the third connecting segment 13 are all provided with window structures 14. The window openings of the window structures 14 on the first connecting segment 11 and the third connecting segment 13 extend along the width direction perpendicular to the fin 10. A portion of the window opening of the window structure 14 on the second connecting segment 12 extends along the width direction perpendicular to the fin 10, while another portion of the window opening of the window structure 14 on the second connecting segment 12 extends along the width direction of the fin 10. The window extending along the width direction of the fin 10 facilitates bending of the second connecting segment 12 to better accommodate the deformation of the fin 10 in the length direction.

[0067] According to another embodiment of the present application, a heat exchanger is provided, which comprises the fin 10 and the heat exchange flat tube 40 provided above, and the heat exchange flat tube 40 is multiple, the multiple heat exchange flat tubes 40 are arranged at intervals, and the fin 10 is arranged between two adjacent heat exchange flat tubes 40.

[0068] In the embodiment, the heat exchanger further comprises an inlet header 20 and an outlet header 30, the inlet header 20 is arranged at one end of the fin 10, the radius of the inlet header 20 is R1; the outlet header 30 is arranged at the other end of the fin 10, the radius of the outlet header 30 is R2; wherein Fw2 < R1 < R2. By adopting the structure, the resistance of the medium in the heat exchanger can be reduced, especially the resistance of the inlet and outlet headers.

[0069] The distance between the insertion ends of the two adjacent heat exchange flat tubes 40 is Tp, which can make Fh2 < Tp, so as to facilitate the bending of the second connecting section 12.

[0070] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: the windward area of the product is improved, the bending area also has the fin 10 to enhance heat exchange, the overall heat exchange capacity is strengthened, and the to-be-bent section is facilitated to be bent.

[0071] It is to be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0072] Unless otherwise specifically stated, the relative arrangements of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the application. At the same time, it should be understood that, for the convenience of description, the sizes of various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technology, methods and devices known to those skilled in the relevant art can not be discussed in detail, but under appropriate circumstances, the technology, methods and devices should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0073] In the description of the application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; The orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0074] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0075] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as a limitation on the scope of protection of the application.

[0076] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A fin characterized in that, The fin comprises: a first connecting section (11), a second connecting section (12) and a third connecting section (13), the second connecting section (12) is arranged between the first connecting section (11) and the third connecting section (13), the second connecting section (12) is used for bending, the second connecting section (12) has oppositely arranged first and second connecting ends, the first connecting end is arranged on the side of the second connecting end away from the third connecting section (13), the extension direction from the first connecting end to the second connecting end is the length direction of the second connecting section (12), along the length direction of the second connecting section (12), the second connecting section (12) is a straight strip structure before bending, and the second connecting section (12) is an arc-shaped strip structure after bending; The first connecting section (11), the second connecting section (12) and the third connecting section (13) are all corrugated structures, the first connecting section (11) has a first wave distance Fp1, the second connecting section (12) has a second wave distance Fp2, and the third connecting section (13) has a third wave distance Fp3; Wherein, Fp2>Fp1, Fp2>Fp3; 2Fp1≤Fp2≤6Fp1; The length of the second connecting section (12) is BL, and the width of the second connecting section (12) is Fw2; wherein, 1.5Fw2≤BL≤5.5Fw2; The bending radius of the second connecting section (12) is R 弯 ; wherein 2Fw2≤R 弯 ≤7Fw2.

2. The fin of claim 1, wherein The length direction of the second connecting section (12) and the height direction of the second connecting section (12) are both perpendicular to the width direction of the second connecting section (12), the width of the second connecting section (12) along the width direction of the second connecting section (12) is Fw2, the width of the first connecting section (11) is Fw1, and the width of the third connecting section (13) is Fw3; Wherein, Fw1=Fw2=Fw3.

3. The fin according to claim 1, wherein: The first connecting section (11) and the second connecting section (12) are arranged in a spaced manner; and / or The third connecting section (13) and the second connecting section (12) are arranged in a spaced manner.

4. The fin of claim 1, wherein The height of the first connecting section (11) is Fh1, the height of the second connecting section (12) is Fh2, and the height of the third connecting section (13) is Fh3; Wherein, Fh2≤Min(Fh1, Fh3).

5. The fin of claim 4, wherein Fh1=Fh3.

6. The fin according to any one of claims 1 to 5, characterized in that Fp1=Fp3.

7. A heat exchanger, characterized by The heat exchanger comprises the fin according to any one of claims 1 to 6.

8. The heat exchanger of claim 7, wherein The heat exchanger further comprises: An inlet header (20) arranged at one end of the fin, the radius of the inlet header (20) is R1; An outlet header (30) arranged at the other end of the fin, the radius of the outlet header (30) is R2; Wherein, Fw2<R1<R2.

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