Flow dividing structure

Abstract

The invention provides a flow dividing structure which comprises a main body part, a flow dividing plate, a flow dividing plate and a flow dividing plate, wherein the main body part is provided with flow dividing cavities and flow dividing holes; the number of the flow dividing holes is multiple, the flow dividing branch pipes and the flow dividing holes are arranged in a one-to-one correspondence mode, and the flow dividing branch pipes are arranged at the positions of the corresponding flow dividing holes; wherein the flow dividing cavity comprises a flow inlet section and a flow dividing section; in the axial direction of the main body part, the flow dividing section is closer to the flow dividing hole than the flow inlet section, the flow dividing section communicates with the flow inlet section and the multiple flow dividing branch pipes, and the flow section of the flow dividing section is larger than that of the flow inlet section. By adopting the technical scheme provided by the invention, the technical problem of poor shunting uniformity of a shunting structure in the prior art can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of flow splitting structures for air duct heat exchangers, and in particular to a flow splitting structure. Background Art

[0002] At present, the flow diversion structure used in the air duct heat exchanger in the prior art is generally used to divert the fluid in the concentrated cavity into multiple branches, so that the multiple branches flow into different pipelines respectively, thereby achieving a flow diversion effect.

[0003] However, the flow splitting structure in the prior art often has the problem of uneven mixing, and the uneven mixing will also make the flow splitting uniformity of the flow splitting structure poor. Summary of the invention

[0004] The main purpose of the present invention is to provide a flow diversion structure to solve the technical problem of poor flow diversion uniformity of the flow diversion structure in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a diversion structure, including: a main body, the main body has a diversion cavity and a diversion hole; a plurality of diversion branches, there are a plurality of diversion holes, the plurality of diversion branches are arranged one-to-one corresponding to the plurality of 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 plurality of diversion branches, and the flow cross-section of the diversion section is larger than the flow cross-section of the inlet section.

[0006] Furthermore, the main body includes: a main pipe and a diverter plate; the diverter plate is welded to one end of the main pipe, and at least part of the diverter plate is located in the diverter cavity; or, the main pipe and the diverter plate are integrally formed; and a plurality of diverter holes are arranged on the diverter plate.

[0007] Furthermore, a positioning step hole is provided at one end of the main pipe 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.

[0008] Furthermore, at least a portion of the branch pipe extends into the branch cavity.

[0009] Furthermore, the diverter hole comprises a diverter hole section and a positioning hole section which are connected in sequence, the positioning hole section is located on a side of the diverter hole section away from the diverter cavity, the shape of the positioning hole section is adapted to the shape of the diverter branch pipe, and the diverter branch pipe is positioned and welded at the positioning hole section;

[0010] Wherein, 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.

[0011] 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.

[0012] Further, the maximum diameter of the flow cross-section of the diverter section is defined as D1, the diameter of the flow cross-section of the inlet section is defined as D2, 1<D1 / D2≤2; and / or, the length of the diverter 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 diverter 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.

[0013] 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 spacing between the centers of any two adjacent diverter holes in the plurality of diverter holes is S, and 0.5≤S / D3≤2.

[0014] Further, the plurality of diverter holes are arranged in an annular manner and spaced apart;

[0015] 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,

[0016] The projection of the hole wall of each flow-dividing 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.

[0017] Furthermore, the maximum wall thickness of the main body is m, m≥2mm; and / or,

[0018] The main body also includes a diverter plate, and the thickness of the diverter plate is n, where n≥0.5 mm.

[0019] Furthermore, the flow-dividing structure further comprises a flange; the flange comprises a main plate body and a connecting plate connected to each other, the main plate body is adapted to the shape of the outer side wall of the main body, and the flange is welded to the outer side wall of the main body through the main plate body; or the flange is integrally formed with the main body;

[0020] There are two connecting plates, and the angle between the two connecting plates is α; 90°≤α≤180°.

[0021] By applying the technical solution of the present invention, 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, which facilitates the full mixing of the fluid entering the diversion section, improves the fluid mixing uniformity in the diversion section, and facilitates the fluid to enter each diversion branch pipe more evenly after passing through the diversion section, thereby improving the fluid diversion uniformity in each diversion branch pipe and avoiding the situation where the fluid in each diversion branch pipe has large differences. Therefore, the technical solution provided by the present invention can solve the technical problem of poor diversion uniformity of the diversion structure in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic structural diagram of a flow diversion structure according to a first embodiment of the present invention is shown at a viewing angle;

[0024] Figure 2 A schematic structural diagram of the flow diversion structure according to the first embodiment provided by the present invention at another viewing angle is shown;

[0025] Figure 3 A cross-sectional view of a flow dividing structure according to a first embodiment of the present invention is shown;

[0026] Figure 4 A top view of a flow dividing structure according to a first embodiment of the present invention is shown;

[0027] Figure 5 A cross-sectional view showing a main body portion of a flow dividing structure according to a second embodiment of the present invention;

[0028] Figure 6 A cross-sectional view of a flow dividing structure according to a second embodiment of the present invention is shown.

[0029] The above drawings include the following reference numerals:

[0030] 10. Main body;

[0031] 11, flow diversion chamber; 111, flow inlet section; 112, flow diversion section; 1121, gradual expansion section; 1122, constant flow section;

[0032] 12. diverter hole; 13. main body; 131. positioning step hole; 14. diverter plate;

[0033] 20. Branch pipe;

[0034] 30. Flange; 31. Main board; 32. Connecting plate. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] like Figures 1 to 6 As shown, an embodiment of the present invention provides a diversion structure, which includes a main body 10 and a plurality of diversion branches 20, wherein 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 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.

[0037] By adopting the flow diversion structure provided in this embodiment, the fluid enters the flow diversion section 112 through the inlet section 111. Since the flow cross section of the flow 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 flow diversion section 112, so that the fluid entering the flow diversion section 112 is fully mixed, and the fluid mixing uniformity in the flow diversion section 112 is improved, so that the fluid can enter each flow diversion branch 20 more evenly after passing through the flow diversion section 112, thereby improving the fluid diversion uniformity in each flow diversion branch 20 and avoiding the situation where the fluid in each flow diversion branch 20 has a large difference. Therefore, by adopting the flow diversion structure provided in this embodiment, the diversion uniformity of the fluid diverted to each flow diversion branch 20 can be effectively increased, and the difference of the fluid in each flow diversion branch 20 can be reduced, so that the fluid in each flow diversion branch 20 can play a roughly similar role.

[0038] In the present embodiment, the plurality of branch pipes 20 and the main body 10 are 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 will be 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, thereby also being able to avoid the loss of flow velocity as much as possible, and keeping the flow velocity difference between the flow velocity in the main body 10 and the flow velocity in the plurality of branch pipes 20 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 the subsequent flow to other components. Therefore, the diversion structure provided in the present embodiment can solve the technical problem of large flow velocity loss in the diversion structure in the prior art.

[0039] In this embodiment, the main body 10 includes a main pipe 13 and a diverter plate 14 .

[0040] like Figure 6 As shown, the diverter plate 14 can be welded to one end of the main pipe 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, so that the diverter plate 14 and the main pipe 13 can be welded and assembled into a shape according to actual needs.

[0041] like Figure 5 As shown, the main body 10 is an integrally formed structure, that is, the main body 10 is cast by an integrally formed process. With such a configuration, the integrity of the main body 10 can be ensured, and the structural strength of the main body 10 can be effectively ensured.

[0042] Specifically, the axes of the plurality of flow diversion holes 12 extend along the axis direction of the main body 13. With such a structural arrangement, the consistency of the axes of the flow diversion holes 12, the main body 13 and the flow diversion branch pipe 20 can be further ensured, so as to effectively ensure the structural consistency of the installation of the three, so as to better ensure the consistency of the flow velocity direction, and better avoid the situation where the flow velocity changes greatly when the flow velocity enters the diversion plate 14 through the main body 13, resulting in a greater reduction in the flow velocity loss.

[0043] 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 a part of the diverter cavity 11, 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. With such a structural setting, it is convenient to effectively position the diverter plate 14, thereby facilitating the stability of welding after the diverter plate 14 is effectively positioned, avoiding the position displacement of the diverter plate 14 during the welding process, and thus better ensuring the structural strength of the welding.

[0044] Specifically, a plurality of shunt branches 20 are welded to the main body 10, which can facilitate welding and assembly, and facilitate production and manufacturing. Alternatively, the shunt structure is an integrally formed structure, that is, the shunt structure is cast through an integrally formed process. With such a setting, it is easy to effectively ensure the integrity of the shunt structure and effectively ensure the structural strength of the shunt structure.

[0045] Specifically, at least a portion of the branch pipe 20 can be extended into the branch chamber 11, so as to accelerate the diversion of the fluid in the branch chamber 11, and facilitate the rapid entry of the fluid mixed more evenly in the branch chamber 11 into each branch pipe 20, further improving the uniformity of diversion. Specifically, the axial length of the branch pipe 20 extending into the branch chamber 11 should exceed 1 / 2 of the axial length of the branch chamber 11, so as to ensure that the fluid in the branch chamber 11 enters each branch pipe 20 after being evenly mixed, so as to facilitate further improving the uniformity of diversion of multiple branch pipes 20.

[0046] 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 pipe 20, and the diverter branch pipe 20 is positioned and welded at the positioning hole section. Among them, 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 pipe 20, thereby facilitating the stability of welding after effectively positioning the diverter branch pipe 20, avoiding the position displacement of the diverter branch pipe 20 during the welding process, and thus better ensuring the structural strength of the welding. The inner diameter of the diverter branch pipe 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 pipe 20 can be maintained at a certain flow velocity, so that it can flow smoothly to the predetermined structure.

[0047] Specifically, along the extension direction of the diversion section 112 of the inlet section 111, 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 the gradually increasing flow cross-section, so as to further improve the uniformity of distribution.

[0048] Specifically, in one embodiment, the flow cross section of the flow diverter section 112 gradually increases. In another embodiment, the flow 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, and the flow cross section of the constant flow section 1122 is a constant value.

[0049] 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, it is convenient to connect with other structures through the thread, thereby ensuring the reliability and stability of the connection.

[0050] 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, and 1≤D1 / D2≤2. With such a setting, it is convenient to effectively ensure the mixing uniformity of the diverter section 112, so that the fluid is mixed evenly in the diverter section 112. When D1 / D2 is too small and specifically less than 1, it is not convenient to effectively mix evenly, which is not conducive to the uniformity of diversion; when D1 / D2 is too large and specifically greater than 2, the flow velocity may be reduced due to the large difference in diameter between the diverter section 112 and the inlet section 111, and a large flow velocity loss may occur.

[0051] 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. With such a setting, it is convenient to effectively ensure the mixing uniformity of the diverter section 112, so that the fluid is mixed evenly 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 too long in the diverter section 112 with a larger cross-section, and the flow velocity is longer, resulting in greater flow loss; when L1 / L2 is too large and specifically greater than 3, it may be difficult to effectively mix evenly and to achieve uniform diversion because the length of the diverter section 112 is too small.

[0052] The length of the thread is L3, the length of the main body 10 is L, and 0.3≤L3 / L≤0.9. With such a setting, the connection strength can be effectively guaranteed. Specifically, when the thread length is too small and L3 / L is less than 0.3, the structural connection strength cannot be effectively guaranteed; when the thread length is too large and L3 / L is greater than 0.9, it will cause certain influence and interference on the flow of the fluid and affect the flow rate.

[0053] The plurality of diverter holes 12 are arranged in an annular pattern, the flow cross-sectional diameter of each of the plurality of diverter holes 12 is D3, the spacing between the centers of any two adjacent diverter holes 12 is S, and 0.5≤S / D3≤2. Such an arrangement can effectively ensure sufficient diverter flow and uniform diverter flow, thereby facilitating uniform mixing.

[0054] In this embodiment, the plurality of flow diversion holes 12 are arranged in an annular manner so as to ensure the flow diversion uniformity of the plurality of flow diversion holes 12 .

[0055] Among them, the projection of the hole wall of each of the multiple diverter 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 multiple diverter 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. With such a structural arrangement, each of the diverter holes 12 can be effectively arranged relative to the inlet section 111, so that the fluid can smoothly enter each of the diverter branches 20 through each of the diverter holes 12, thereby effectively avoiding a large change in flow direction, avoiding a large flow loss, and facilitating full mixing and diversion.

[0056] Specifically, the flow splitter structure is made of stainless steel material to effectively ensure the structural strength. The maximum wall thickness of the main body 10 is m, m ≥ 2 mm, so that the structural strength of the main body 10 can be effectively ensured. The thickness of the splitter plate 14 is n, n ≥ 0.5 mm, so as to effectively ensure the structural strength of the splitter plate 14.

[0057] The splitter plate 14 is made by laser cutting or stamping, so that the manufacturing process is simple and the manufacturing cost is reduced.

[0058] In this embodiment, the flow-dividing structure further includes a flange 30, and the flange 30 includes a main plate body 31 and a connecting plate 32 connected to each other. The main plate body 31 can be adapted to 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 through the main plate body 31; or, the flange 30 and the main body 10 can be integrally formed.

[0059] There are two connecting plates 32, and the angle between the two connecting plates 32 is α. 90°≤α≤180°. With such a flange 30 structure, the connection stability of the flange 30 is ensured while the space occupied by the flange 30 is reduced, thereby improving the compactness of the structural layout.

[0060] Specifically, the connecting plate 32 is disposed protruding from a side of the main plate body 31 away from the main body 10 , so as to facilitate the connecting plate 32 to be connected with other components to be connected.

[0061] 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.

[0062] From the above description, it can be seen that the above-mentioned embodiments of the present invention 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 to be 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 velocity is reduced due to the bent pipe structure, and can solve the technical problem of large flow velocity loss in the diversion structure in the prior art.

[0063] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps 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 accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0065] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present 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, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0067] 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.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

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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