Flow distribution structure

Abstract

The present application provides a flow distribution structure. The flow distribution structure comprises: a main body part, the main body part having a flow distribution cavity and flow distribution holes; and a plurality of flow distribution branch pipes, a plurality of flow distribution holes being provided, the plurality of flow distribution branch pipes being arranged in one-to-one correspondence with the plurality of flow distribution holes, and the flow distribution branch pipes being arranged at corresponding flow distribution holes. The flow distribution cavity comprises a flow inlet section and a flow distribution section; along the axial direction of the main body part, the flow distribution section is arranged closer to the flow distribution holes than the flow inlet section; the flow distribution section is communicated with the flow inlet section and the plurality of flow distribution branch pipes; and the flow cross-section of the flow distribution section is larger than that of the flow inlet section. By using the technical solution provided by the present application, the technical problem in the prior art of poor flow distribution uniformity of flow distribution structures can be solved.

Description

Diversion structure

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on August 31, 2023, with application number 202311123502.9 and application name “Diversion Structure”. Technical Field

[0002] The present application relates to the technical field of shunt structures for air duct heat exchangers, and in particular to a shunt structure. Background Art

[0003] At present, the diversion structure used in the existing air duct heat exchanger is generally used to divert the fluid in the centralized cavity into multiple branches, so that the multiple branches flow into different pipelines respectively, thereby achieving a diversion effect.

[0004] However, the flow diversion structure in the prior art often has uneven mixing, which will also lead to poor diversion uniformity of the flow diversion structure.

[0005] Summary of the Invention

[0006] The main purpose of the present application is to provide a diversion structure to solve the technical problem of poor diversion uniformity of the diversion structure in the prior art.

[0007] In order to achieve the above-mentioned purpose, the present application provides a diversion structure, including: a main body, the main body having a diversion cavity and a diversion hole; a plurality of diversion branches, there are multiple diversion holes, the multiple diversion branches are arranged in a one-to-one correspondence with the multiple diversion holes, and each diversion branch is arranged at the corresponding diversion hole; wherein, the diversion cavity includes an inlet section and a diversion section; along the axial direction of the main body, the diversion section is arranged closer to the diversion hole than the inlet section, the diversion section connects the inlet section and the multiple diversion branches, and the flow cross-section of the diversion section is larger than the flow cross-section of the inlet section.

[0008] Furthermore, the main body includes: a main body and a diverter plate; the diverter plate is welded to one end of the main body, and at least part of the diverter plate is located in the diverter cavity; or, the main body and the diverter plate are integrally formed; a plurality of diverter holes are provided on the diverter plate.

[0009] Furthermore, a positioning step hole is provided at one end of the main body, the diverter cavity includes the positioning step hole, the positioning step hole is adapted to the shape of the diverter plate, and the diverter plate is positioned and welded at the positioning step hole.

[0010] Furthermore, at least a portion of the branch pipe extends into the branch cavity.

[0011] Furthermore, the diversion hole includes a diversion hole section and a positioning hole section connected in sequence, the positioning hole section is located on a side of the diversion hole section away from the diversion cavity, the shape of the positioning hole section is adapted to the shape of the diversion branch pipe, and the diversion branch pipe is positioned and welded at the positioning hole section;

[0012] The aperture of the positioning hole section is larger than the aperture of the diverting hole section; and / or the inner diameter of the diverting branch pipe is smaller than or equal to the aperture of the diverting hole section.

[0013] Furthermore, along the extension direction from the inlet section to the diverter section, the flow cross section of at least part of the diverter section gradually increases.

[0014] Further, the maximum diameter of the flow cross-section of the diversion section is defined as D1, the flow cross-section diameter of the inlet section is defined as D2, 1<D1 / D2≤2; and / or, the length of the diversion section is defined as L1, the length of the inlet section is defined as L2, 0.2≤L1 / L2≤3; and / or, a thread is provided on the inner wall of the inlet section at one end away from the diversion section, the length of the thread is defined as L3, the length of the main body is defined as L, 0.3≤L3 / L≤0.9.

[0015] Furthermore, the plurality of diverter holes are arranged in an annular pattern, and the flow cross-sectional diameter of each diverter hole is defined as D3. The distance between the centers of any two adjacent diverter holes in the plurality of diverter holes is S, and 0.5≤S / D3≤2.

[0016] Furthermore, the plurality of diversion holes are arranged in an annular manner and spaced apart;

[0017] wherein the projection of the hole wall of each diversion hole close to the edge of the main body on the flow cross section of the inlet section is located within the flow cross section of the inlet section; or,

[0018] The projection of the hole wall of each diversion hole close to the edge of the main body on the flow cross section of the inlet section is flush with the inner wall of the inlet section.

[0019] Furthermore, the maximum wall thickness of the main body is m, m ≥ 2 mm; and / or,

[0020] The main body also includes a diverter plate, and the thickness of the diverter plate is n, where n≥0.5 mm.

[0021] Furthermore, the flow diversion structure further includes a flange; the flange includes a main plate body and a connecting plate connected to each other, the main plate body is adapted to the shape of the outer wall of the main body, and the flange is welded to the outer wall of the main body through the main plate body; or the flange is integrally formed with the main body;

[0022] There are two connecting plates, and the angle between the two connecting plates is α; 90°≤α≤180°.

[0023] By applying the technical solution of the present application, the fluid enters the diversion section through the inlet section. Since the flow cross-section of the diversion section is larger than the flow cross-section of the inlet section, the flow velocity of the fluid becomes relatively slow after entering the diversion section, thereby facilitating the full mixing of the fluid entering the diversion section, improving the fluid mixing uniformity in the diversion section, and facilitating the fluid to enter each diversion branch more evenly after passing through the diversion section, thereby improving the fluid diversion uniformity in each diversion branch and avoiding the situation where the fluid in each diversion branch has large differences. Therefore, the technical solution provided by the present application can solve the technical problem of poor diversion uniformity of the diversion structure in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0025] FIG1 shows a schematic structural diagram of a diversion structure according to a first embodiment of the present application at one viewing angle;

[0026] FIG2 shows a schematic structural diagram of the diversion structure according to the first embodiment provided by the present application from another perspective;

[0027] FIG3 shows a cross-sectional view of a diversion structure according to a first embodiment of the present application;

[0028] FIG4 shows a top view of a diversion structure according to a first embodiment of the present application;

[0029] FIG5 shows a cross-sectional view of the main body of the diversion structure according to the second embodiment provided by the present application;

[0030] FIG6 shows a cross-sectional view of a diversion structure according to a second embodiment of the present application.

[0031] Among them, the above-mentioned drawings include the following figure marks: 10, main body; 11, diverter cavity; 111, inlet section; 112, diverter section; 1121, gradually expanding section; 1122, constant flow section; 12, diverter hole; 13, main body; 131, positioning step hole; 14, diverter plate; 20, diverter branch pipe; 30, flange; 31, main body; 32, connecting plate. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] As shown in Figures 1 to 6, an embodiment of the present application provides a diversion structure, which includes a main body 10 and a plurality of diversion branches 20. The main body 10 has a diversion cavity 11 and a plurality of diversion holes 12 connected to the diversion cavity 11. The plurality of diversion branches 20 are arranged in a one-to-one correspondence with the plurality of diversion holes 12, and each diversion branch 20 is arranged at a corresponding diversion hole 12. The diversion cavity 11 includes an inlet section 111 and a diversion section 112; along the axial direction of the main body 10, the diversion section 112 is arranged closer to the diversion hole 12 than the inlet section 111, and the diversion section 112 connects the inlet section 111 and the plurality of diversion branches 20, and the flow cross-section of the diversion section 112 is larger than the flow cross-section of the inlet section 111.

[0034] By adopting the diversion structure provided in this embodiment, the fluid enters the diversion section 112 through the inlet section 111. Since the flow cross-section of the diversion section 112 is larger than the flow cross-section of the inlet section 111, the flow velocity of the fluid becomes relatively slow after entering the diversion section 112, thereby facilitating the full mixing of the fluid entering the diversion section 112 and improving the uniformity of the fluid mixing in the diversion section 112. This facilitates the fluid to enter each diversion branch 20 more evenly after passing through the diversion section 112, thereby improving the uniformity of fluid diversion in each diversion branch 20 and avoiding the situation where there are large differences in the fluids in each diversion branch 20. Therefore, by adopting the diversion structure provided in this embodiment, the diversion uniformity of the fluid diverted to each diversion branch 20 can be effectively increased, the differences in the fluids in each diversion branch 20 can be reduced, and the fluids in each diversion branch 20 can play roughly the same role.

[0035] In this embodiment, the plurality of branch pipes 20 and the main body 10 are all straight pipe structures, and the plurality of branch pipes 20 extend along the axial direction of the main body 10. By setting the plurality of branch pipes 20 and the main body 10 as straight pipe structures, the flow direction of the fluid in the main body 10 is roughly the same as the flow direction of the fluid in the plurality of branch pipes 20, thereby avoiding the situation where the fluid in the main body 10 flows into the plurality of branch pipes 20 and undergoes a large change in direction, thereby greatly reducing the impact of the internal fluid due to the change in direction, and thus minimizing the loss of flow velocity. The flow velocity difference between the flow velocity in the main body 10 and the flow velocity in the plurality of branch pipes 20 is kept as small as possible, so that the flow velocity of the fluid flowing out through the branch pipes 20 still retains sufficient kinetic energy, thereby facilitating subsequent flow to other components. Therefore, the diversion structure provided by this embodiment can solve the technical problem of large flow velocity loss in the diversion structure in the prior art.

[0036] In this embodiment, the main body 10 includes a main pipe 13 and a diverter plate 14 .

[0037] As shown in Figure 6, the diverter plate 14 can be welded to one end of the main body 13 so that at least part of the diverter plate 14 is located in the diverter cavity 11, and a plurality of diverter holes 12 are provided on the diverter plate 14. This makes it easy to weld and assemble the diverter plate 14 and the main body 13 according to actual needs.

[0038] As shown in FIG5 , the main body 10 is an integrally formed structure, that is, the main body 10 is cast through an integral molding process. This arrangement can ensure the integrity of the main body 10 and effectively ensure the structural strength of the main body 10.

[0039] Specifically, the axes of the plurality of diverter holes 12 extend along the axis of the main body 13. This structural arrangement further ensures the consistency of the axes of the diverter holes 12, the main body 13, and the diverter branch pipe 20, thereby effectively ensuring the structural consistency of the installation of the three, thereby better ensuring the consistency of the flow velocity direction, and better avoiding the situation where the flow velocity changes greatly when entering the diverter plate 14 through the main body 13, resulting in a significant reduction in flow velocity loss.

[0040] Specifically, in one embodiment, a positioning step hole 131 is provided at one end of the main body 13. The positioning step hole 131 is part of the diverter cavity 11 and matches the shape of the diverter plate 14. The diverter plate 14 is positioned and welded at the positioning step hole 131. This structural arrangement facilitates effective positioning of the diverter plate 14, thereby facilitating the stability of the welding after the diverter plate 14 is effectively positioned, preventing the diverter plate 14 from shifting during the welding process, and thereby better ensuring the structural strength of the weld.

[0041] Specifically, multiple branch pipes 20 are welded to the main body 10, which facilitates welding and assembly, facilitating manufacturing. Alternatively, the branch structure can be integrally molded, that is, cast using an integral molding process. This arrangement effectively ensures the integrity of the branch structure and its structural strength.

[0042] Specifically, at least a portion of the branch pipe 20 can be extended into the diverter cavity 11 to accelerate the diversion of the fluid in the diverter cavity 11, allowing the fluid that is relatively evenly mixed in the diverter cavity 11 to quickly enter each branch pipe 20, further improving the uniformity of the diversion. Specifically, the axial length of the branch pipe 20 extending into the diverter cavity 11 should exceed 1 / 2 of the axial length of the diverter cavity 11 to ensure that the fluid in the diverter cavity 11 enters each branch pipe 20 after being evenly mixed, thereby further improving the uniformity of the diversion of the multiple branch pipes 20.

[0043] Alternatively, the diverter hole 12 includes a diverter hole section and a positioning hole section connected in sequence, the positioning hole section is located on the side of the diverter hole section away from the diverter cavity 11, the shape of the positioning hole section is adapted to the shape of the diverter branch 20, and the diverter branch 20 is positioned and welded at the positioning hole section. The aperture of the positioning hole section is larger than the aperture of the diverter hole section. With such a structural setting, it is convenient to effectively position the diverter branch 20, thereby facilitating the stability of the welding after the diverter branch 20 is effectively positioned, avoiding the position displacement of the diverter branch 20 during the welding process, and thus better ensuring the structural strength of the welding. The inner diameter of the diverter branch 20 is less than or equal to the aperture of the diverter hole section. In this way, it is convenient to effectively ensure the throttling and diverting effect, so that the flow velocity of the fluid in the diverter branch 20 can be maintained at a certain flow velocity, so that it can flow smoothly into the predetermined structure.

[0044] Specifically, along the extension direction from the inlet section 111 to the diversion section 112, the flow cross-section of at least part of the diversion section 112 gradually increases, so that the fluid in the inlet section 111 can effectively ensure the uniform mixing effect in the diversion section 112 as it enters at least part of the diversion section 112 with a gradually increasing flow cross-section, so as to further improve the uniformity of distribution.

[0045] Specifically, in one embodiment, the flow cross-section of the diverter section 112 gradually increases. In another embodiment, the diverter section 112 includes a gradually expanding section 1121 and a constant flow section 1122. The gradually expanding section 1121 is located between the constant flow section 1122 and the inlet section 111. The flow cross-section of the gradually expanding section 1121 gradually increases, while the flow cross-section of the constant flow section 1122 is a constant value.

[0046] Specifically, a thread is provided on the inner wall of the end of the inlet section 111 away from the diversion section 112. With such a structural arrangement, the thread can be easily connected to other structures, thereby ensuring the reliability and stability of the connection.

[0047] In this embodiment, the maximum diameter of the flow cross section of the diverter section 112 is defined as D1, and the diameter of the flow cross section of the inlet section 111 is defined as D2, where 1≤D1 / D2≤2. This configuration effectively ensures the mixing uniformity of the diverter section 112, so that the fluid is evenly mixed within the diverter section 112. When D1 / D2 is too small, specifically less than 1, effective mixing is not facilitated, which is detrimental to the uniformity of diversion. When D1 / D2 is too large, specifically greater than 2, the large difference in diameter between the diverter section 112 and the inlet section 111 may result in a reduction in flow velocity and a significant loss of flow velocity.

[0048] The length of the diverter section 112 is L1, and the length of the inlet section 111 is L2, and 0.2≤L1 / L2≤3. This setting can effectively ensure the mixing uniformity of the diverter section 112, so that the fluid is evenly mixed in the diverter section 112. When L1 / L2 is too small and specifically less than 0.2, the difference between the diverter section 112 and the inlet section 111 is small, which will cause the fluid to flow for too long in the diverter section 112 with a larger cross-section, with a longer flow rate, resulting in greater flow loss; when L1 / L2 is too large and specifically greater than 3, the diverter section 112 may be too short, which may be detrimental to effective mixing and diversion uniformity.

[0049] The length of the thread is L3, and the length of the main body 10 is L, where 0.3 ≤ L3 / L ≤ 0.9. This arrangement effectively ensures connection strength. Specifically, if the thread length is too short, and L3 / L is less than 0.3, the structural connection strength cannot be effectively guaranteed. If the thread length is too long, and L3 / L is greater than 0.9, it will affect and interfere with the flow of the fluid, affecting the flow rate.

[0050] The plurality of diverter holes 12 are arranged in an annular pattern with intervals. The flow cross-sectional diameter of each diverter hole 12 is D3. The center spacing between any two adjacent diverter holes 12 is S, and 0.5≤S / D3≤2. This arrangement effectively ensures sufficient and uniform diversion, thereby facilitating uniform mixing.

[0051] In this embodiment, the plurality of diverter holes 12 are arranged in an annular manner to ensure diverter uniformity of the plurality of diverter holes 12 .

[0052] The projection of the hole wall of each of the plurality of diverter holes 12 near the edge of the main body 10 on the flow cross section of the inlet section 111 is located within the flow cross section of the inlet section 111, or the projection of the hole wall of each of the plurality of diverter holes 12 near the edge of the main body 10 on the flow cross section of the inlet section 111 is flush with the inner wall of the inlet section 111. This structural arrangement allows each diverter hole 12 to be effectively positioned relative to the inlet section 111, facilitating smooth flow entry into each diverter branch pipe 20 through each diverter hole 12, thereby effectively avoiding significant changes in flow direction, avoiding significant flow losses, and facilitating sufficient mixing and diversion.

[0053] Specifically, the diverter structure is made of stainless steel to effectively ensure structural strength. The maximum wall thickness of the main body 10 is m, where m ≥ 2 mm, which effectively ensures the structural strength of the main body 10. The thickness of the diverter plate 14 is n, where n ≥ 0.5 mm, which effectively ensures the structural strength of the diverter plate 14.

[0054] The diverter plate 14 is made by laser cutting or stamping, which simplifies the manufacturing process and reduces the manufacturing cost.

[0055] In this embodiment, the flow diversion structure further includes a flange 30, which comprises a main plate 31 and a connecting plate 32 that are interconnected. The main plate 31 can be configured to match the shape of the outer wall of the main body 10, and the flange 30 can be welded to the outer wall of the main body 10 via the main plate 31; alternatively, the flange 30 can be integrally formed with the main body 10.

[0056] There are two connecting plates 32, and the angle between them is α, where 90°≤α≤180°. This flange 30 structure ensures the connection stability of the flange 30 while also minimizing the space occupied by the flange 30, thereby improving the compactness of the structural layout.

[0057] Specifically, the connecting plate 32 is provided to protrude from a side of the main plate body 31 away from the main body 10 , so as to facilitate the connection of the connecting plate 32 with other components to be connected.

[0058] Specifically, the flange 30 can be welded to the main body 10 or directly formed integrally with the main body 10. The provision of the flange 30 can further facilitate the installation of the diversion structure.

[0059] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: by setting the diversion branch pipe 20 and the main body 10 of the straight pipe structure, the flow direction of the fluid in the main body 10 can be made roughly the same as the flow direction of the fluid in the multiple diversion branch pipes 20, thereby avoiding the situation where the fluid is impacted and the flow rate is reduced due to the bent pipe structure, and can solve the technical problem of large flow rate loss in the diversion structure in the prior art.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0062] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0065] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A diversion structure, characterized in that: include: A main body (10), wherein the main body (10) has a flow diversion cavity (11) and a flow diversion hole (12); A plurality of flow branch pipes (20), the plurality of flow branch holes (12), the plurality of flow branch pipes (20) being arranged in one-to-one correspondence with the plurality of flow branch holes (12), and each of the flow branch pipes (20) being arranged at a corresponding flow branch hole (12); The diversion cavity (11) comprises an inlet section (111) and a diversion section (112); along the axial direction of the main body (10), the diversion section (112) is arranged closer to the diversion hole (12) than the inlet section (111); the diversion section (112) connects the inlet section (111) and the plurality of diversion branch pipes (20); and the flow cross section of the diversion section (112) is larger than the flow cross section of the inlet section (111).

2. The flow diversion structure according to claim 1, characterized in that: The main body (10) comprises: a main pipe (13) and a diverter plate (14); The diverter plate (14) is welded to one end of the main pipe (13), and at least a portion of the diverter plate (14) is located in the diverter cavity (11); or, the main pipe (13) and the diverter plate (14) are integrally formed; The diverter plate (14) is provided with a plurality of diverter holes (12).

3. The flow diversion structure according to claim 2, characterized in that: A positioning step hole (131) is provided at one end of the main body (13); the diverter cavity (11) includes the positioning step hole (131); the positioning step hole (131) is adapted to the shape of the diverter plate (14); and the diverter plate (14) is positioned and welded at the positioning step hole (131).

4. The flow diversion structure according to claim 1, characterized in that: At least a portion of the flow branch pipe (20) extends into the flow branch cavity (11).

5. The flow diversion structure according to claim 1, characterized in that: The diverter hole (12) comprises a diverter hole section and a positioning hole section which are connected in sequence, the positioning hole section being located on a side of the diverter hole section away from the diverter cavity (11), the shape of the positioning hole section being adapted to the shape of the diverter branch pipe (20), and the diverter branch pipe (20) being positioned and welded at the positioning hole section; Wherein, the aperture of the positioning hole section is larger than the aperture of the diverter hole section; and / or, The inner diameter of the flow branch pipe (20) is smaller than or equal to the aperture of the flow branch hole section.

6. The flow diversion structure according to claim 1, characterized in that: Along the extension direction from the inlet section (111) to the diverter section (112), the flow cross section of at least part of the diverter section (112) gradually increases.

7. The flow dividing structure according to any one of claims 1 to 6, characterized in that: The maximum diameter of the flow cross section of the diversion section (112) is defined as D1, the diameter of the flow cross section of the inlet section (111) is defined as D2, 1<D1 / D2≤2; and / or, The length of the diversion section (112) is defined as L1, the length of the inlet section (111) is defined as L2, and 0.2≤L1 / L2≤3; and / or, A thread is provided on the inner wall of one end of the inlet section (111) away from the diversion section (112), and the length of the thread is defined as L3. The length of the main body (10) is L, and 0.3≤L3 / L≤0.

9.

8. The flow diversion structure according to claim 2 or 3, characterized in that: The plurality of diverter holes (12) are arranged in an annular pattern, and the flow cross-sectional diameter of each diverter hole (12) is defined as D3. The spacing between the centers of any two adjacent diverter holes (12) in the plurality of diverter holes (12) is S, and 0.5≤S / D3≤2.

9. The flow diversion structure according to claim 1, characterized in that: The plurality of diverter holes (12) are arranged in an annular manner and spaced apart from each other; wherein the projection of the hole wall of each of the flow dividing holes (12) close to the edge of the main body (10) on the flow cross section of the inlet section (111) is located within the flow cross section of the inlet section (111); or, The projection of the hole wall of each of the flow dividing holes (12) close to the edge of the main body (10) on the flow cross section of the inlet section (111) is flush with the inner wall of the inlet section (111).

10. The flow dividing structure according to any one of claims 1 to 6, characterized in that: The maximum wall thickness of the main body (10) is m, m≥2 mm; and / or, The main body (10) further comprises a diverter plate (14), the thickness of the diverter plate (14) being n, where n≥0.5 mm.

11. The flow dividing structure according to any one of claims 1 to 6, characterized in that: The flow splitting structure further comprises a flange (30); The flange (30) comprises a main plate (31) and a connecting plate (32) connected to each other, the main plate (31) is adapted to the shape of the outer wall of the main body (10), and the flange (30) is welded to the outer wall of the main body (10) through the main plate (31); or, the flange (30) and the main body (10) are integrally formed; There are two connecting plates (32), and the angle between the two connecting plates (32) is α; 90°≤α≤180°.

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