Flow guide cover and fan

Abstract

The utility model discloses a flow guide cover and a fan, and belongs to the technical field of fans, the flow guide cover comprises a flow guide structure provided with an air guide channel, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the air guide channel; and the mesh enclosure structure is connected to the flow guide structure, the mesh enclosure structure is arranged at the air inlet and / or the air outlet, and the mesh enclosure structure is connected with the flow guide structure. By arranging the mesh enclosure structure on the flow guide cover, the mesh enclosure structure corresponds to the air inlet or the air outlet, or the mesh enclosure structure corresponds to the air inlet and the air outlet at the same time, airflow can make contact with the mesh enclosure structure when passing through the air inlet or the air outlet, the mesh enclosure structure can play a role in rectifying the airflow, and the flow speed of air is reduced; therefore, noise generated in the flowing process of the air can be reduced.

Description

Technical Field

[0001] This application belongs to the field of wind turbine technology, and specifically relates to a flow guide and a wind turbine. Background Technology

[0002] Wind turbines, as a traditional type of fluid machinery, are widely used in various fields of economic development, such as energy engineering, and are used in products like photovoltaic inverters and energy storage devices. During operation, the structure of a wind turbine collides with the air, generating considerable noise. Utility Model Content

[0003] The purpose of this application is to provide a flow guide to overcome the technical problem of large noise generated by the fan during use; another purpose of this application is to provide a fan.

[0004] Technical solution: A flow guide according to an embodiment of this application, the flow guide comprising:

[0005] The airflow guiding structure has an airflow guiding channel, and an air inlet and an air outlet connected to the airflow guiding channel;

[0006] A mesh structure is provided at the air inlet and / or the air outlet, and the mesh structure is connected to the air guide structure.

[0007] In some embodiments, the mesh structure includes:

[0008] The main body of the mesh cover is connected to the air guiding structure and is correspondingly arranged with the air inlet and / or the air outlet;

[0009] The noise reduction unit is connected to the main body of the mesh cover.

[0010] In some embodiments, the mesh body includes:

[0011] Multiple first grilles are arranged at intervals around the central axis of the air guide channel, with one end of each first grille connected to the air guide structure and the other end extending toward the central axis.

[0012] The noise reduction part is disposed on at least one of the first grilles, and the noise reduction part is disposed on at least one side corresponding to the first grille.

[0013] In some embodiments, the noise reduction unit is disposed on the side of the first grille facing and / or away from the adjacent first grille.

[0014] In some embodiments, the noise reduction part is any one of a protruding structure, a grooved structure, a sawtooth structure, a wavy structure, or a combination of multiple structures.

[0015] In some embodiments, a plurality of the first grids are arranged radially.

[0016] In some embodiments, each of the first grilles is an arc-shaped structure.

[0017] In some embodiments, the mesh body includes:

[0018] Multiple second grilles are provided, each of which is arranged around the central axis of the air guide channel. The multiple second grilles are arranged in a multi-layered ring structure and are respectively connected to each of the first grilles.

[0019] The noise reduction part is disposed on at least one of the second grilles, and the noise reduction part is disposed on at least one side corresponding to the second grille.

[0020] In some embodiments, the noise reduction element is disposed on the side of the second grille facing and / or away from the adjacent second grille.

[0021] In some embodiments, at least a portion of the mesh structure protrudes along the direction from the air inlet to the air outlet; or, at least a portion of the mesh structure protrudes along the direction from the air outlet to the air inlet.

[0022] In some embodiments, the mesh structure is disposed outside the flow guiding structure, and the flow guiding structure further includes a support structure, through which the mesh structure is connected to the flow guiding structure.

[0023] In some embodiments, the inner diameter of the air inlet of the air guide structure is greater than or equal to the inner diameter of the air outlet.

[0024] In some embodiments, the inner wall of the air guide channel is at least partially arc-shaped in the direction from the air inlet to the air outlet.

[0025] In some embodiments, the airflow guiding structure further includes a plurality of rectifiers located on the side of the air outlet away from the air inlet, and the plurality of rectifiers are arranged around the central axis of the airflow guiding channel.

[0026] This application also provides a fan, comprising:

[0027] Fan body;

[0028] A flow guide shroud, as described above, is disposed on the main body of the fan.

[0029] In some embodiments, the wind turbine body includes:

[0030] The base, and the flow guiding structure of the flow guide shroud is connected to the base;

[0031] A fan frame is connected to the base on the side opposite to the flow guide structure.

[0032] Beneficial Effects: The air guide cover of this application embodiment includes: an air guide structure having an air guide channel, and an air inlet and an air outlet communicating with the air guide channel; and a mesh cover structure, wherein the air inlet and / or air outlet are provided with a mesh cover structure, and the mesh cover structure is connected to the air guide structure. By providing a mesh cover structure on the air guide cover, such that the mesh cover structure is correspondingly set with the air inlet or air outlet, or the mesh cover structure is simultaneously correspondingly set with both the air inlet and air outlet, the airflow will come into contact with the mesh cover structure when passing through the air inlet or air outlet. The mesh cover structure can rectify the airflow, reduce the air velocity, and thus reduce the noise generated during airflow. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A perspective view of the fairing provided in an embodiment of this application;

[0035] Figure 2 A top view of the fairing provided in an embodiment of this application;

[0036] Figure 3 A top view of the first grille provided in an embodiment of this application;

[0037] Figure 4 A top view of another form of the first grille provided in an embodiment of this application;

[0038] Figure 5 A top view of the second grille provided in an embodiment of this application;

[0039] Figure 6 A top view of another form of the second grille provided in an embodiment of this application;

[0040] Figure 7 This is a front sectional view of the fairing provided in an embodiment of this application, wherein the mesh structure has a protruding portion;

[0041] Figure 8a A perspective view of the flow guide provided in an embodiment of this application, wherein the mesh structure is located at the bottom of the flow guide structure;

[0042] Figure 8b This is a perspective view of a flow guide provided in an embodiment of this application, wherein the mesh structure is located at the top of the flow guide structure;

[0043] Figure 8c This is a perspective view of a flow guide provided in an embodiment of this application, wherein the mesh structure is located inside the flow guide structure;

[0044] Figure 9a This is a front sectional view of the flow guiding structure provided in an embodiment of this application, wherein the flow guiding structure is a conical structure;

[0045] Figure 9b This is a front sectional view of the flow guiding structure provided in an embodiment of this application, wherein the inner wall of the flow guiding structure is at least partially arc-shaped;

[0046] Figure 10 A perspective view of a fairing with a rectifier provided for an embodiment of this application;

[0047] Figure 11 A perspective view of the fan provided in an embodiment of this application;

[0048] Reference numerals: 10-Fan body; 11-Base; 12-Fan frame; 20-Guide structure; 21-Air guide channel; 22-Air inlet; 23-Air outlet; 24-Rectifier; 30-Mesh structure; 31-Mesh body; 311-First grille; 312-Second grille; 32-Noise reduction part; 40-Support structure; 50-Central axis. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0051] As a traditional fluid machinery, wind turbines are widely used in various fields of economic development, such as energy engineering, and in products like photovoltaic inverters and energy storage devices. To meet heat dissipation requirements, high-speed operation and simultaneous operation of multiple turbines are often employed, inevitably leading to significant noise pollution and even impacting people's physical and mental health. With continuous optimization of motor and mechanical noise, aerodynamic noise has become the main noise source for axial flow fans. Based on aerodynamic generation mechanisms, wind turbine aerodynamic noise is mainly divided into discrete noise and broadband noise. Discrete noise is generated by the blades striking the surrounding gas medium during high-speed rotation, causing pressure pulsations in the surrounding gas. Broadband noise is mainly due to eddy current noise generated by pressure pulsations in the airflow caused by turbulent boundary layer formation and shedding from the blades. Research on the aerodynamic noise characteristics of wind turbines in new energy equipment such as photovoltaic inverters, energy storage devices, and charging piles shows that discrete noise accounts for a relatively high proportion of wind turbine aerodynamic noise.

[0052] In view of the above, embodiments of this application provide a flow deflector to overcome at least one of the above-mentioned technical problems.

[0053] Please see Figure 1 and Figure 2 In this embodiment of the application, the flow guide includes a flow guide structure 20 and a mesh structure 30.

[0054] The airflow guiding structure 20 has an airflow guiding channel 21, and an air inlet 22 and an air outlet 23 connected to the airflow guiding channel 21. A mesh cover structure 30 is provided at one or both of the air inlet 22 and the air outlet 23 of the airflow guiding structure 20, and the mesh cover structure 30 is connected to the airflow guiding structure 20.

[0055] The airflow guiding structure 20 can be a cylindrical structure with an internal airflow guiding channel 21. The airflow guiding structure 20 includes an air inlet 22 and an air outlet 23 arranged opposite each other. Airflow can enter the interior of the airflow guiding channel 21 through the air inlet 22, flow along the airflow guiding channel 21, and then flow out from the air outlet 23. A mesh structure 30 is also connected to the airflow guiding structure 20. The mesh structure 30 can be a mesh structure or a perforated structure, etc. (e.g., Figure 1 As shown), it can be configured to correspond with the air inlet 22 of the airflow guiding structure 20 (e.g., Figure 8a For example, it can be set on the opening edge of the air inlet 22, or it can be set on the side of the air inlet 22 facing the inside of the air guide channel 21, or it can be set on the side of the air inlet 22 facing the outside of the air guide channel 21. In this case, as shown in 8b, the mesh structure 30 has a certain distance from the air inlet 22. Similarly, it can be set corresponding to the air outlet 23 of the air guide structure 20, or simultaneously corresponding to both the air inlet 22 and the air outlet 23 of the air guide structure 20 (e.g., Figure 8cThe specific arrangement of the shroud is similar to the positional relationship of the air inlet 22 of the airflow guide structure 20. The airflow guide is generally installed on a fan. Under the action of the fan, airflow enters the interior of the airflow guide channel 21 through the air inlet 22, and then exits through the air outlet 23. During the airflow process, the gas comes into contact with the mesh structure 30. The mesh structure 30 can rectify and reduce the speed of some of the airflow, thereby reducing noise. Simultaneously, since air forms vortices during flow, the mesh structure 30 can reduce the size and intensity of the vortices, thus significantly reducing the broadband noise of vortices caused by vortex shedding and separation, and consequently reducing the aerodynamic noise generated by the fan rotation, achieving a noise reduction effect.

[0056] In addition, the air guide channel 21 can be configured as a trumpet-shaped structure, a straight cylindrical structure, an L-shaped elbow structure, or an arc-shaped structure. The mesh structure 30 on the air guide can isolate the blades of the fan from direct contact with the outside without affecting the air intake, preventing fingers or foreign objects from entering the fan and playing a safety protection role.

[0057] Please see Figure 1 and Figure 2 In conjunction with the above embodiments, in some embodiments, the mesh structure 30 includes a mesh body 31 and multiple noise reduction parts 32. The mesh body 31 is connected to the airflow guiding structure 20, and during installation, it can be configured to correspond to the air inlet 22 of the airflow guiding structure 20 (e.g., Figure 8a Alternatively, it can be configured to correspond with the air outlet 23 of the airflow guiding structure 20 (e.g., Figure 8b ), or simultaneously corresponding to the air inlet 22 and air outlet 23 of the airflow guiding structure 20 (e.g. Figure 8c Multiple noise reduction sections 32 are provided on the main body 31 of the fan guard. As air flows around the main body 31, the unstable vortices generated by the high-speed rotation of the fan pass through the multiple noise reduction sections 32. The noise reduction sections 32 can transform the large-sized vortices formed around the main body 31 into small-sized vortices, reducing the intensity of the vortices. This greatly reduces the broadband noise of the vortices caused by the shedding and separation of the boundary layer of the airflow on the fan blades, thereby reducing the aerodynamic noise generated by the rotation of the fan and further playing a role in noise reduction.

[0058] Please see Figure 1 and Figure 2In conjunction with the above embodiments, in some embodiments, a plurality of first grilles 311 are provided on the main body 31 of the mesh cover. The plurality of first grilles 311 are spaced apart around the central axis 50 of the air guide channel 21, so that the airflow can flow between or around the first grilles 311. Since one end of each first grille 311 is connected to the air guide structure 20 and the other end extends toward the central axis 50, each first grille 311 can have high stability. When the gas flows through the first grille 311, the first grille 311 is not prone to vibration, reducing the source of noise and reducing noise to a certain extent. Extending toward the central axis 50 can increase the length of the first grille 311, thereby increasing the contact area between the first grille 311 and the gas, which can adjust the airflow velocity and reduce the intensity of the vortex formed around the first grille 311, thereby achieving the effect of reducing noise.

[0059] Furthermore, at least a portion of the first grille 311 is arc-shaped, and at least a portion of the first grille 311 protrudes or recesses circumferentially along the guide structure 20. That is, the first grille 311 can be formed entirely by an arc-shaped structure, or it can be formed by a combination of a partially arc-shaped structure and a partially straight structure. The arc-shaped structure is beneficial for adjusting the airflow velocity and reducing the intensity of the vortex formed around the first grille 311, thereby achieving the effect of noise reduction. At the same time, a noise reduction part 32 is provided on the first grille 311. The noise reduction part 32 can be provided on one side of the first grille 311 in a direction perpendicular to the central axis 50, that is, on the side of the first grille 311 facing the adjacent first grille 311, or on the side facing away from the adjacent first grille 311, or noise reduction parts 32 can be provided on both sides, so that the airflow direction is basically perpendicular to the setting direction of the noise reduction part 32, reducing the airflow velocity and further playing a role in noise reduction. The noise reduction section 32 can also be set on one or both sides of the first grille 311 along the Y direction. Since the gas flow is uncertain, some gas will also flow perpendicular to the Y direction. The gas flowing perpendicular to the Y direction will pass through the noise reduction section 32 set along the Y direction. The noise reduction section 32 is basically perpendicular to the flow direction of the corresponding gas, which can also reduce the flow rate of this part of the gas and further play the role of noise reduction.

[0060] Please see Figure 1 In conjunction with the above embodiments, in some embodiments, when multiple first grilles 311 are connected to the airflow guiding structure 20, they can be arranged in a radial distribution, with the first grilles 311 extending radially along the airflow guiding structure 20. This radial distribution helps to guide airflow more effectively. Furthermore, as... Figure 2As shown, when multiple first grilles 311 are connected to the airflow guiding structure 20, they can be arranged in a vortex-radial pattern. This vortex-radial distribution further helps to guide airflow more effectively. Each grille faces the same direction, reducing airflow resistance and making airflow smoother. The radial distribution can also help disperse vibration and noise, thereby reducing the noise level during operation and providing a quieter user experience. In some cases, the radial distribution can improve the overall structural strength of the grilles, making them more durable and less prone to deformation or damage during operation.

[0061] In practical applications, in order to adapt to more working conditions, the multiple first grids 311 can be linear, the multiple first grids 311 are arranged in parallel with each other at intervals, and the array arrangement structure formed by the multiple first grids 311 serves as the mesh cover structure 30.

[0062] Please see Figure 1 and Figure 2 In conjunction with the above embodiments, in some embodiments, the mesh cover body 31 includes a plurality of second grilles 312. The plurality of second grilles 312 are arranged around the central axis 50 of the air guide channel 21, and the plurality of second grilles 312 are arranged in a multi-layered annular structure and are respectively connected to each first grille 311. The plurality of second grilles 312 can be annular structures with different radii. The annular structure can adjust the airflow velocity and reduce the intensity of the vortex formed near the second grille 312, thereby achieving the effect of reducing noise.

[0063] At least one second grille 312 is provided with a noise reduction part 32, and the noise reduction part 32 is disposed on at least one side of the corresponding second grille 312. That is, the noise reduction part 32 can be disposed on the side of the second grille 312 facing the adjacent second grille 312, or on the side away from the adjacent second grille 312, or on one or both sides of the second grille 312 along the Y direction. The placement position, density, and size of the noise reduction part 32 on the second grille 312 can be flexibly adjusted according to the actual noise reduction requirements. Generally speaking, the more noise reduction parts 32 there are, the better the noise reduction effect. By providing the noise reduction part 32 on the first grille 311, and the placement direction of the noise reduction part 32 is basically perpendicular to the air flow direction, the air velocity can be reduced when passing around the noise reduction part 32, further playing a role in noise reduction.

[0064] Please see Figure 3 , Figure 4 , Figure 5 and Figure 6In conjunction with the above embodiments, in some embodiments, the noise reduction part 32 can be configured as any one or a combination of a protruding structure, a grooved structure, a sawtooth structure, and a wavy structure. The noise reduction part 32 has a relatively simple structure, which can reduce the processing cost and difficulty of the mesh structure 30, while also reducing the airflow velocity and improving the rectification and noise reduction effect of the first grille 311 and the second grille 312. The shape of the noise reduction part 32 is not limited; it can be a protruding structure, a grooved structure, a sawtooth structure, a wavy structure, an arc structure, a rectangular structure, or an irregular shape. The number of protruding or grooved structures can be set as needed.

[0065] Please see Figure 7 In conjunction with the above embodiments, in some embodiments, at least a portion of the mesh structure 30 protrudes along the direction from the air inlet 22 to the air outlet 23, or at least a portion of the mesh structure 30 protrudes along the direction from the air outlet 23 to the air inlet 22, or a portion of the mesh structure 30 protrudes along the direction from the air inlet 22 to the air outlet 23, while a portion of the mesh structure 30 protrudes along the direction from the air outlet 23 to the air inlet 22.

[0066] It is understandable that the surface of a typical mesh cover is a planar structure. By making a portion of the mesh cover structure 30 bulge along the direction from the air inlet 22 to the air outlet 23, or a portion of the mesh cover structure 30 bulges along the direction from the air outlet 23 to the air inlet 22, that is, at least a portion of the mesh cover structure 30 bulges or is recessed along the Y direction, and the mesh cover structure 30 can also have both bulges and recesses in this Y direction, this arrangement can increase the contact area between the mesh cover structure 30 and the air. By setting at least a portion of the first grille 311 on different planes, or at least a portion of the second grille 312 on different planes, or both the first grille 311 and the second grille 312 having at least a portion set on different planes, the mesh cover structure 30 can form a concave-convex structure. This concave-convex structure can increase the air rectification area of ​​the mesh cover structure 30, making the reduction of air pressure pulsation more significant and the noise reduction effect better.

[0067] Please see Figure 8a and Figure 8b In conjunction with the above embodiments, in some embodiments, the mesh structure 30 is disposed outside the flow guiding structure 20, and the flow guiding structure also includes a support structure 40, and the mesh structure 30 is connected to the flow guiding structure 20 through the support structure 40.

[0068] Understandably, traditional air hoods are typically located inside the airflow guide structure 20. When the fan directs the gas flow in the Y direction, the gas flow is concentrated within the airflow guide channel 21, resulting in a greater force exerted by the gas on the air hood structure 30, which may generate significant noise. This application places the air hood structure 30 outside the airflow guide structure 20. When the fan directs the air flow from the air inlet 22 to the air outlet 23, it delays the contact time between the air and the air hood structure 30, reducing the airflow velocity to some extent. The force generated when the flowing air contacts the air hood structure 30 is smaller, thus reducing noise to a certain degree. Specifically, the air hood structure 30 can be located outside the airflow guide structure 20 and corresponding to the air outlet 23 (e.g., ...). Figure 8a The mesh structure 30 can cover the air outlet 23, or it can be set with a certain distance between it and the air outlet 23 (the mesh structure 30 is set outside the air guide structure 20, which can delay the contact time between the mesh structure 30 and the airflow, so that the flowing gas needs to travel a longer distance before contacting the mesh structure 30, resulting in a reduction in the flow velocity of the gas when it contacts the mesh structure 30, thereby reducing noise to a certain extent). In this setting, the mesh structure 30 completely overlaps with the air outlet 23 in the Y direction, or it can partially overlap with the air outlet 23 in the Y direction; or it can be set corresponding to the air inlet 22 (e.g., Figure 8b The mesh structure 30 can cover the air inlet 22, or there can be a certain gap between it and the air inlet 22. In this case, the mesh structure 30 completely overlaps with the air inlet 22 in the Y direction, or it can partially overlap with the air inlet 22 in the Y direction.

[0069] Please see Figure 9a In conjunction with the above embodiments, in some embodiments, the inner diameter of the air inlet 22 of the air guide structure 20 is greater than or equal to the inner diameter of the air outlet 23. For example, the cross-sections at both ends of the inner wall of the air guide channel 21 are larger, and the cross-section at the center is smaller.

[0070] It is understandable that the airflow guiding structure 20 is generally a cylindrical structure with a uniform inner diameter. This means that the inner diameter of the air inlet 22 to the air outlet 23 on the airflow guiding structure 20 will not change; the inner diameters will always remain equal. However, the inner diameter of the air inlet 22 on the airflow guiding structure 20 can also be larger than the inner diameter of the air outlet 23, and can be set as follows: Figure 9a The conical annular structure shown, with its larger air inlet 22, helps to slow down the air velocity as it enters the guide structure 20, reducing turbulence and vortex generation, thereby lowering the noise level during operation. The larger air inlet 22 also allows for more uniform airflow, avoiding localized high or low pressure conditions, which helps improve overall aerodynamic performance and reduce energy loss.

[0071] Please see Figure 9bIn conjunction with the above embodiments, in some embodiments, the inner wall of the air guide channel 21 is at least partially arc-shaped from the air inlet 22 to the air outlet 23.

[0072] It is understandable that the gas flow direction is the same as or opposite to the Y direction. In the Y direction, the inner wall of the air guide channel 21 has an arc-shaped structure. That is, part of the inner wall of the air guide channel 21 extends along the Y direction, and another part extends inclined to the Y direction, and this part has an arc-shaped structure, forming a structure like... Figure 9b The flared air inlet 22 or flared air outlet 23 are shown. Alternatively, the inner wall of the air guide channel 21 extends entirely along the inclined Y direction. This part has an arc-shaped structure, so when air flows in the arc-shaped position, the arc-shaped structure can better rectify the air and reduce the air velocity, thereby achieving the effect of noise reduction.

[0073] Please see Figure 10 In conjunction with the above embodiments, in some embodiments, the airflow guiding structure 20 further includes a plurality of rectifiers 24, which are located on the side of the air outlet 23 away from the air inlet 22, and are arranged around the central axis 50 of the airflow guiding channel 21.

[0074] It is understood that multiple rectifying parts 24 can be provided on the airflow guiding structure 20. The rectifying parts 24 can be protrusions or grooves, and the shape of the protrusions or grooves can be triangular, arc-shaped, rectangular, or irregular. Preferably, if the multiple rectifying parts 24 are located on the side of the air outlet 23 away from the air inlet 22, the multiple rectifying parts 24 are provided at the air outlet 23 position of the airflow guiding structure 20; the multiple rectifying parts 24 can also be provided at the air inlet 22 position of the airflow guiding structure 20, and protrude in a direction away from the airflow guiding structure 20 along the extension direction of the central axis 50, so that the edge of the airflow guiding structure 20 can form a sawtooth or wavy edge; or, the airflow guiding structure 20 can be recessed along the extension direction of the central axis 50, so that the edge of the airflow guiding structure 20 can form a sawtooth or wavy edge.

[0075] This design allows the gas to form smaller vortices as it passes through multiple rectifier sections 24, reducing vortex intensity and significantly decreasing broadband noise caused by vortex shedding and separation. This, in turn, reduces aerodynamic noise generated by the fan's rotation, thus achieving noise reduction. If the guide structure 20 folds outward at the outlet 23 and extends horizontally, with multiple rectifier sections 24 connected to this folded portion, some airflow will pass through these rectifier sections 24 due to the uncertainty of the airflow direction. This also helps reduce noise in that portion of the airflow.

[0076] Please see Figure 8cIn conjunction with the above embodiments, in some embodiments, the flow guiding structure 20 and the mesh cover structure 30 are integrally formed. It is understood that the flow guiding structure 20 and the mesh cover structure 30 can be integrally formed using a mold during processing, reducing processing steps and lowering processing difficulty, eliminating the need for separate processing of the flow guiding structure 20 and the mesh cover structure 30. The integral flow guiding structure 20 and the mesh cover structure 30 have higher connection strength, reducing the probability of separation and ensuring the stability of their connection.

[0077] Please see Figure 10 In conjunction with the above embodiments, this application provides a fan, including a fan body 10 and a guide shroud disposed on the fan body 10. The fan body 10 is the core part of the fan, consisting of a motor, impeller (or blades), and casing, and is mainly used to convert mechanical energy into airflow energy. The guide structure 20 is installed above or around the fan body 10 to improve fan efficiency and reduce operating noise by optimizing the airflow direction.

[0078] Please see Figure 11 In conjunction with the above embodiments, in some embodiments, the fan body 10 includes a base 11 and a fan frame 12. The airflow guide structure 20 of the base 11 shroud is connected to the base 11. The fan frame 12 is connected to the side of the base 11 opposite to the airflow guide structure 20. The base 11 is the basic support component of the fan, and the airflow guide structure 20 of the shroud is connected to the base 11 in a specific way to optimize the airflow direction. Meanwhile, the fan frame 12 is connected to the side of the base 11 opposite to the airflow guide structure 20, and typically houses key components such as impellers or blades, responsible for converting mechanical energy into airflow energy. This design allows the fan to efficiently drive airflow during operation, while reducing noise and energy loss through the optimization effect of the airflow guide, thereby achieving higher performance and lower energy consumption. The shape of the base 11 can be set according to actual needs; for example, the projection of the base 11 onto a plane perpendicular to the Y direction can be circular, rectangular, elliptical, etc.

[0079] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0080] The above provides a detailed description of the air guide and fan provided in the embodiments of this application, and uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A fairing, characterized by, The fairing comprises: A flow guide structure (20) having a wind guide channel (21), and an air inlet (22) and an air outlet (23) communicating with the wind guide channel (21); A mesh cover structure (30) provided at the air inlet (22) and / or the air outlet (23), the mesh cover structure (30) being connected with the flow guide structure (20).

2. The fairing of claim 1, wherein, The mesh cover structure (30) comprises: A mesh cover body (31) connected with the flow guide structure (20) and provided corresponding to the air inlet (22) and / or the air outlet (23); A noise reduction part (32) connected with the mesh cover body (31).

3. The fairing of claim 2, wherein, The mesh cover body (31) comprises: A plurality of first gratings (311) arranged at intervals around a central axis (50) of the wind guide channel (21), one end of each of the first gratings (311) being connected with the flow guide structure (20) and the other end extending towards the central axis (50); The noise reduction part (32) is provided on at least one side of at least one of the first gratings (311).

4. The fairing of claim 3, wherein, The noise reduction part (32) is provided on the side of the first grating (311) facing and / or away from the adjacent first grating (311).

5. The fairing of claim 2, wherein, The noise reduction part (32) is any one of a convex structure, a groove structure, a sawtooth structure, a wave structure, or a combination of multiple thereof.

6. The fairing of claim 3, wherein, The plurality of first gratings (311) are distributed radially. Alternatively, each of the first gratings (311) is an arc structure.

7. The fairing of claim 3, wherein, The mesh cover body (31) comprises: A plurality of second gratings (312), each of the second gratings (312) being arranged around the central axis (50) of the wind guide channel (21), the plurality of second gratings (312) being arranged in a multi-layer annular structure and connected with each of the first gratings (311); The noise reduction part (32) is provided on at least one side of at least one of the second gratings (312).

8. The fairing of claim 7, wherein, The noise reduction part (32) is provided on the side of the second grating (312) facing and / or away from the adjacent second grating (312).

9. The fairing of claim 1, wherein, At least part of the mesh cover structure (30) is convex in the direction from the air inlet (22) to the air outlet (23); Alternatively, at least part of the mesh cover structure (30) is convex in the direction from the air outlet (23) to the air inlet (22); Alternatively, the mesh cover structure (30) is provided outside the flow guide structure (20), and the fairing further comprises a support structure (40), the mesh cover structure (30) being connected with the flow guide structure (20) through the support structure (40).

10. The fairing of claim 1, wherein, The inner diameter of the air inlet (22) of the flow guide structure (20) is greater than or equal to the inner diameter of the air outlet (23); Alternatively, the inner wall of the wind guide channel (21) is at least partially arc-shaped in the direction from the air inlet (22) to the air outlet (23).

11. The fairing of claim 1, wherein, The flow guide structure (20) further comprises a plurality of rectifying portions (24), and the plurality of rectifying portions (24) are located on edges of the flow guide structure (20) corresponding to the air outlet or the air inlet (22); The plurality of rectifying portions (24) are arranged around a central axis (50) of the air guide channel (21) and are protruded or recessed along an extension direction of the central axis (50).

12. A fan, characterized by The fan comprises: A fan body (10); The flow guide cover as claimed in any one of claims 1 to 11 is arranged on the fan body (10).

13. The fan of claim 12, wherein, The fan body (10) comprises: A base (11), and the flow guide structure (20) of the flow guide cover is connected to the base (11); A fan frame (12) connected to a side of the base (11) away from the flow guide structure (20).

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