Fairing, fan structure and air duct structure

Abstract

The utility model discloses a fairing, a fan structure and an air duct structure, and belongs to the technical field of fans, the fairing comprises a plurality of bent parts, at least two bent parts are sequentially arranged in a sleeving mode, and rectification openings are formed in the bent parts; in the first direction, the projections of at least two bending parts in the plurality of bending parts are overlapped. When flowing in the first direction, airflow can sequentially pass through the at least two bending parts, and the airflow can be rectified by the bending parts every time the airflow passes through the bending parts, so that vortexes generated in the gas flowing process are reduced, and noise generated by the airflow is reduced. When the airflow flowing in the first direction passes through the two or more bending parts, the multiple bending parts can rectify the airflow for multiple times, so that the noise of the airflow in the flowing process is gradually reduced, and the rectifying and noise reducing effects are obvious.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fans, and particularly relates to a fairing, a fan structure and an air duct structure. BACKGROUND

[0002] As a traditional fluid machine, a fan is widely used in various fields of economic development such as energy engineering, photovoltaic inverters, energy storage devices and the like. A fairing structure is generally installed on the fan to straighten airflow and reduce noise. However, the effect of the fairing on straightening and noise reduction is not obvious. CONTENT OF THE INVENTION

[0003] The application aims to overcome the technical problem that the effect of the fairing on straightening and noise reduction is not obvious. Another object of the application is to provide a fan structure. A third object of the application is to provide an air duct structure.

[0004] TECHNICAL SCHEME The fairing provided by the application comprises:

[0005] A plurality of bending portions, at least two of which are sequentially sleeved, and each of the bending portions is provided with a straightening port.

[0006] In the first direction, the projections of at least two of the bending portions are overlapped.

[0007] In some embodiments, in the first direction, the projections of the straightening ports on the at least two bending portions are all overlapped.

[0008] Alternatively, in the first direction, the projections of the straightening ports on the at least two bending portions are partially overlapped.

[0009] Alternatively, in the first direction, the projections of the straightening ports on the at least two bending portions are completely staggered.

[0010] In some embodiments, the fairing comprises an intermediate portion arranged between two adjacent bending portions, at least part of the intermediate portion is a convex structure, or at least part of the intermediate portion is a concave structure, or at least part of the intermediate portion extends in the first direction.

[0011] In some embodiments, in the first direction, the intermediate portion extends in any one of an arc shape, a wave shape and a straight line shape.

[0012] In some embodiments, the fairing is formed by interlacing a plurality of first gratings and a plurality of second gratings, the plurality of first gratings are radially spaced around the central axis, the second gratings each extend circumferentially around the central axis and are connected with the plurality of first gratings, and the plurality of first gratings and the plurality of second gratings are interlaced to form the plurality of fairing ports.

[0013] In some embodiments, the surface of the first grating and / or the second grating is provided with a noise reduction structure, which is any one of a sawtooth structure, a protruding structure, and a groove structure.

[0014] In some embodiments, the included angle between the first side of each first grating facing the adjacent first grating and the horizontal plane is a, satisfying: 0° < a < 90°.

[0015] In some embodiments, the height of the vertex on the first grating gradually decreases or gradually increases in a direction perpendicular to the central axis X.

[0016] In some embodiments, the second grating has two second sides facing away from each other in a direction parallel to the central axis, and the included angle between the second side and the horizontal plane is b, satisfying: 0° < b < 90°.

[0017] In some embodiments, the fairing has an opening, and the fairing includes a protective portion provided at the opening, and the protective portion has a through hole communicating with the opening.

[0018] A fan structure, comprising:

[0019] a fan body;

[0020] a base provided on one side of the fan body;

[0021] The fairing of any one of the above, the fairing is provided on the side of the base away from the fan body.

[0022] In some embodiments, the starting end of the fairing extends away from the fan body, and the end of the fairing extends towards the fan body;

[0023] Alternatively, the starting end of the fairing extends towards the fan body, and the end of the fairing extends away from the fan body.

[0024] A duct structure, comprising a duct shell and the fan structure described above;

[0025] The fan mounting port is formed on the duct shell, and the fan structure is arranged on the fan mounting port.

[0026] In some embodiments, the fan mounting port is arranged at a middle portion of the air duct housing;

[0027] An air inlet or an air outlet is arranged at an end portion of the air duct housing away from the fan mounting port.

[0028] Beneficial effects: The fairing of the embodiment of the application comprises: a plurality of bending portions, at least two bending portions are sequentially sleeved, and each of the bending portions is provided with a fairing port; in a first direction, projections of the at least two bending portions in the plurality of bending portions overlap. When the airflow flows in the first direction, the airflow can sequentially pass through the at least two bending portions, and the airflow is rectified by each bending portion to reduce vortex generated in the process of gas flow and reduce noise generated by the airflow. The airflow flowing in the first direction passes through two or more bending portions, and the plurality of bending portions rectify the airflow multiple times, thereby gradually reducing the noise of the airflow in the process of flow, and the effect of rectification and noise reduction is obvious. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 A perspective view of the fairing provided by the embodiment of the application is shown;

[0031] Figure 2 A top view structural schematic diagram of the fairing provided by the embodiment of the application is shown, wherein the fairing is a circular structure;

[0032] Figure 3 A top view structural schematic diagram of the fairing provided by the embodiment of the application is shown, wherein the fairing is a square structure;

[0033] Figure 4 A top view structural schematic diagram of the fairing provided by the embodiment of the application is shown, wherein the fairing is a C-shaped structure;

[0034] Figure 5 A structural schematic diagram of the fairing provided by the embodiment of the application is shown, wherein the bending portions of the fairing are not directly connected;

[0035] Figure 6 A structural schematic diagram of the fairing provided by the embodiment of the application is shown, wherein the cross section of the fairing is roughly sawtooth-shaped;

[0036] Figure 7 A perspective view of the fairing provided by the embodiment of the application is shown, wherein the middle portion of the fairing is at least partially in a convex structure;

[0037] Figure 8 A perspective view of a fairing provided in an embodiment of this application, wherein at least part of the middle portion of the fairing has a recessed structure;

[0038] Figure 9 This is a perspective view of a fairing provided in an embodiment of this application, wherein a first grille and a second grille are staggered to form a fairing, and the first grille has a transition section;

[0039] Figure 10 A schematic diagram showing that the transition section on the first grille in this embodiment is a straight-line structure;

[0040] Figure 11 A schematic diagram showing that the transition section on the first grille provided in this application is a raised arc-shaped structure;

[0041] Figure 12 A schematic diagram showing that the transition section on the first grille provided in this application is a recessed arc-shaped structure;

[0042] Figure 13 A schematic diagram showing that the transition section on the first grille in this embodiment of the application has a wavy structure;

[0043] Figure 14 A schematic diagram of a noise reduction structure provided on a fairing according to an embodiment of this application;

[0044] Figure 15 A perspective view of the first grille provided in an embodiment of this application, wherein a noise reduction structure is provided on the first grille;

[0045] Figure 16 A perspective view of a fairing provided in an embodiment of this application, wherein the first grille on the fairing is disposed at an angle;

[0046] Figure 17 A partial structural schematic diagram of the fairing provided in an embodiment of this application;

[0047] Figure 18 A perspective view of a fairing provided in an embodiment of this application, wherein the second grille on the fairing is disposed at an angle;

[0048] Figure 19 A schematic diagram illustrating the distance from the vertex of the first grille to the reference plane, provided in an embodiment of this application;

[0049] Figure 20 This is a schematic diagram of the structure between the second grille and the horizontal plane provided in an embodiment of this application;

[0050] Figure 21 A perspective view of a fairing provided in an embodiment of this application, wherein a protective portion is provided on the fairing;

[0051] Figure 22 A perspective view of the fan structure provided in the embodiments of this application;

[0052] Figure 23 The diagram shows the structure of the starting and ending ends of the fairing provided in the embodiment of this application, wherein the starting end extends away from the fan body and the ending end extends toward the fan body.

[0053] Figure 24 The diagram shows the structure of the starting and ending ends of the fairing provided in the embodiment of this application, wherein the starting end extends toward the fan body and the ending end extends away from the fan body.

[0054] Figure 25 This is a schematic diagram of the air duct structure provided in an embodiment of this application, wherein the two ends of the air duct shell are air inlets;

[0055] Figure 26 This is a schematic diagram of the air duct structure provided in an embodiment of this application, wherein the two ends of the air duct shell are air outlets;

[0056] Reference numerals: 10-base; 20-fairing; 21-rectifier port; 22-middle section; 23-bend; 24-first grille; 241-first section; 242-transition section; 243-second section; 244-first side; 25-second grille; 251-second side; 26-noise reduction structure; 27-opening; 28-protective part; 281-through hole; 29-connection structure; 30-fan body; 40-duct housing; 41-fan mounting port; 50-starting end; 60-ending end; X-central axis; Y-first direction. Detailed Implementation

[0057] 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.

[0058] 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.

[0059] As an introduction to the embodiments of this application, a shroud installed on a fan is introduced. Fans, as a traditional fluid machinery, are widely used in various sectors of the national economy, 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 fans are often employed, inevitably leading to significant noise pollution and even affecting people's physical and mental health. With the continuous optimization of motor and mechanical noise, aerodynamic noise has become the main noise source for axial flow fans. According to the aerodynamic generation mechanism, fan 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 the turbulent boundary layer of the blades and its shedding. Through research on the aerodynamic noise characteristics of fans in new energy equipment such as photovoltaic inverters, energy storage devices, and charging piles, discrete noise accounts for a high proportion of fan aerodynamic noise, mainly caused by the fundamental frequency and harmonic noise of the fan.

[0060] To reduce fan noise, a shroud can be installed on the fan. Traditional shrouds are generally horn-shaped air guides, which can rectify the airflow near the wall of the air guide, thus reducing noise. However, the noise reduction of the shroud is limited and the rectification effect is not good. Some shrouds have a grid-like structure with rectification ports, which can rectify more airflow. However, the airflow can only be rectified and reduced in noise through one rectification port, so the rectification and noise reduction effect is not obvious.

[0061] In view of this, embodiments of this application provide a fairing to overcome at least one of the above-mentioned technical problems.

[0062] Please see Figure 1 In this embodiment, the fairing 20 includes multiple bends 23, with at least two bends 23 sequentially nested together, and each bend 23 has a flow-rectifying port 21. In the first direction Y, the projections of at least two of the multiple bends 23 overlap. Each bend 23 can be an annular structure, and each annular bend 23 has the same central axis X, i.e., the multiple bends 23 can be in a concentric circle structure (e.g., ...). Figure 2 Each bend 23 can also be square (e.g., Figure 3 ), polygonal or C-shaped structures (such as Figure 4 The multiple bends 23 are distributed sequentially along the first direction Y. Adjacent bends 23 can be directly connected to each other; or they can be spaced apart and connected by a connecting structure 29 (e.g., ...). Figure 5 ).

[0063] In the first direction Y, at least two of the multiple bends 23 are sequentially nested together, where nesting means that the bends 23 can be arranged as follows: Figure 1 One of the bends 23 shown is located inside the other bend 23. The structure of the bend 23 can be annular, square, or C-shaped. The height of two or more bends 23 in a nested configuration is not limited; the height of each bend 23 is not limited. Adjacent or spaced bends 23 can have the same height or different heights (height refers to the distance from the top of the bend 23 to a reference plane perpendicular to the central axis X in the direction of the central axis X).

[0064] Each bend 23 is provided with a rectifier port 21. The number of rectifier ports 21 on each bend 23 can be one or more. Through the rectifier ports 21, the gas flowing through the rectifier shroud 20 can be guided. When the fan is working, the flowing gas can pass through the rectifier ports 21 on the bend 23 (the shape of the rectifier ports 21 is not limited, and can be polygonal, circular, elliptical, or irregular in shape, such as triangular, quadrilateral, or pentagonal). After the action of the rectifier ports 21, the large vortices originally formed by the gas can be transformed into smaller vortices, dispersing the energy of the airflow, reducing the generation of turbulence, and thus achieving the effect of noise reduction.

[0065] In the first direction Y, the projections of at least two of the multiple bends 23 overlap. When the airflow flows along the first direction Y, it can pass through at least two bends 23 in sequence. The surface of the bend 23 is generally an arc-shaped surface, which can rectify the airflow. Each time the airflow passes through a bend 23, it will be rectified by that bend 23 to reduce the eddies generated during the gas flow and reduce the noise generated by the airflow. During the flow, the airflow will pass through two or more bends 23. Multiple bends 23 can rectify the airflow flowing along the first direction Y multiple times, thereby successively reducing the noise of the airflow during the flow. The rectification and noise reduction effects are obvious.

[0066] The surface of the bent portion 23 is generally provided with an arc-shaped structure (e.g. Figure 1 Alternatively, a planar structure can be designed. When a planar structure is designed, multiple bends 23 are nested together sequentially, resulting in a sawtooth-shaped vertical cross-sectional structure for the fairing (e.g., Figure 6 ).

[0067] Please see Figure 1In conjunction with the above embodiments, in some embodiments, in the first direction Y, the projections of the rectifier ports 21 on at least two bends 23 completely overlap. Alternatively, in the first direction Y, the projections of the rectifier ports 21 on at least two bends 23 partially overlap. Alternatively, in the first direction Y, the projections of the rectifier ports 21 on at least two bends 23 are completely offset.

[0068] It is understood that, in the first direction Y, the rectifier port 21 on each bend 23 has a projection (this projection is located on a plane perpendicular to the first direction Y). Among the multiple bends 23, the projections of the rectifier ports 21 on at least two bends 23 overlap. This overlap can be partial or complete (partial overlap can mean that the projections of one rectifier port 21 on a single bend 23 and one rectifier port 21 on another single bend 23 partially overlap, or that the projections of M rectifier ports 21 on a single bend 23 and N rectifier ports 21 on another single bend 23 partially overlap). The overlapping portion of the rectifier ports 21 in the first direction Y allows the airflow to directly pass through at least two bends 23 with overlapping portions during its flow along the first direction Y. By using the rectifier ports 21 on at least two bends 23, the multiple rectifier ports 21 rectify the airflow, allowing for multiple rectifications of the flowing airflow, thereby gradually reducing the noise during the flow process. At the same time, there is no need to change the direction of airflow, so that the airflow can maintain a certain flow rate and the airflow passes through the fairing 20 with high efficiency.

[0069] In the multiple bends 23, the projections of the rectifier ports 21 on two or more bends 23 can be completely staggered, so that when the airflow flows along the first direction Y, after passing through the rectifier port 21 on one bend 23, it will collide with the solid position of another bend 23 on the flow path, thereby weakening the flow velocity of the airflow, reducing the eddies generated during the gas flow, reducing the energy of the airflow, and thus achieving the effect of noise reduction.

[0070] Please see Figure 1 , Figure 7 and Figure 8 In conjunction with the above embodiments, in some embodiments, the fairing 20 includes a middle portion 22, which is disposed between two adjacent bends 23. At least a portion of the middle portion 22 is a protruding structure, or at least a portion of the middle portion 22 is a recessed structure, or at least a portion of the middle portion 22 extends along a first direction Y.

[0071] Understandably, a central section 22 is also provided on the fairing 20. The central section 22 connects two adjacent bends 23 distributed along the first direction Y, serving to connect the two bends 23. Simultaneously, a rectifier port 21 can also be provided on the central section 22, allowing some airflow to be rectified and noise reduced through the rectifier port 21 on the central section 22. Figure 7 At least a portion of the middle portion 22 protrudes along the direction of the central axis X, or, as Figure 8 At least a portion of the middle section 22 is recessed along the direction of the central axis X (the protrusion refers to a more protruding portion relative to the two bends 23 on both sides of the middle section 22, and the recess refers to a more concave portion relative to the two bends 23 on both sides of the middle section 22). The middle section 22, with its protrusion or concavity along the direction of the central axis X, increases the flow area of ​​the shroud 20, allowing it to contact more airflow and increasing the rectification range of the airflow, thus achieving a better rectification and noise reduction effect. The rectification ports 21 can be located on the protruding sides or the concave sides of the middle section 22, allowing airflow flowing along the first direction Y to pass through at least two rectification ports 21 on the middle section 22, thereby achieving a rectification and noise reduction effect on that portion of the airflow.

[0072] At least a portion of the intermediate portion 22 may also extend along the first direction Y, that is, the intermediate portion 22 is configured as a planar structure to connect the two bent portions 23 (e.g., Figure 1 At least one rectifier port 21 is provided on the middle part 22. The orientation of the rectifier port 21 can intersect with the first direction Y. The orientation of the rectifier port 21 can be along the direction of the central axis X, or it can be inclined to the direction of the central axis X. This facilitates the passage of airflow in other directions (other directions are different from the first direction Y) and has the effect of rectifying and reducing noise in the airflow in other directions.

[0073] Please see Figure 1 , Figure 7 and Figure 8 In conjunction with the above embodiments, in some embodiments, the middle portion 22 extends along the first direction Y in any one of the following shapes: arc, wave, and straight.

[0074] It is understandable that, in the first direction Y, the intermediate portion 22 can extend in an arc shape, that is, the intermediate portion 22 is convex or concave along the direction of the central axis X, thus forming an arc shape. The intermediate portion 22 can also extend in a wave-like structure, that is, the intermediate portion 22 has both convex and concave portions along the direction of the central axis X, with the convex and concave portions connected sequentially along the first direction Y, thus forming a wave-like structure. The intermediate portion 22 can also extend in a straight line, that is, extend on a certain plane. All these extension structures of the intermediate portion 22 can increase the area of ​​the fairing 20, allowing more airflow to pass through the fairing 20 for rectification, thereby improving the efficiency of rectification and noise reduction.

[0075] Please see Figure 9 In conjunction with the above embodiments, in some embodiments, the fairing 20 is formed by a plurality of first grilles 24 and a plurality of second grilles 25 in an alternating manner. The plurality of first grilles 24 are arranged radially at intervals around the central axis X, and the second grilles 25 are all arranged circumferentially around the central axis X and connected to the plurality of first grilles 24. The plurality of first grilles 24 and the plurality of second grilles 25 are interwoven to form a plurality of rectifier ports 21.

[0076] The first grille 24 includes a first section 241, a transition section 242, and a second section 243 connected in sequence. A plurality of second grilles 25 are connected to a plurality of first sections 241 and a plurality of second sections 243 to form a plurality of bends 23. A plurality of second grilles 25 are connected to a plurality of transition sections 242 to form an intermediate section 22.

[0077] The first grille 24 may also include only the first segment 241 and the second segment 243 connected in sequence, and multiple second grilles 25 are connected to multiple first segments 241 and multiple second segments 243 to form multiple bends 23.

[0078] Understandably, the fairing 20 is primarily a mesh structure formed by multiple interlaced first grilles 24 and multiple second grilles 25. The first grilles 24 are strip-shaped structures, arranged radially around the central axis X, and spaced apart from each other. Each second grille 25 is an annular structure and connected to multiple first grilles 24, with each second grille 25 extending circumferentially around the central axis X. The inner diameter of each second grille 25 is different, and the multiple second grilles 25 radiate outward from the central axis X, allowing the multiple second grilles 25 and multiple first grilles 24 to interweave and connect, forming multiple evenly distributed rectification ports 21, enabling the multiple rectification ports 21 to uniformly rectify the gas.

[0079] The first grille 24 can be composed of a first segment 241, a transition segment 242, and a second segment 243 connected sequentially. Multiple first segments 241 connected to multiple second grilles 25, and multiple second segments 243 connected to multiple second grilles 25, can form the aforementioned bend 23. Multiple second grilles 25 connected to multiple transition segments 242 can form the aforementioned middle section 22. The second segment 243 has a specific bending direction, such that the second segment 243 overlaps with the first segment 241 in the first direction Y. When gas flows along the first direction Y, it can pass through the rectifier port 21 formed by the first segment 241 and the second grille 25, or through the rectifier port 21 formed by the second segment 243 and the second grille 25. Passing through multiple rectifier ports 21 achieves multiple rectifications, improving noise reduction. A transition segment 242 connects between the first segment 241 and the second segment 243. The transition segment 242 is generally a straight structure (e.g., ...). Figure 10 The transition section 242 increases the surface area of ​​the fairing 20, allowing more gas to contact the surface of the fairing 20. At the contact point, the gas velocity decreases, achieving a rectification effect. The transition section 242 increases the rectification area of ​​the fairing 20, resulting in better noise reduction.

[0080] Transition segment 242 can be configured as an arc-shaped structure (e.g.) Figure 11 and Figure 12 The transition section 242 can be convex upwards or concave downwards. While maintaining a constant length along the first direction Y, the arc-shaped structure has a larger surface area, further increasing the contact area between the transition section 242 and the gas. This allows the transition section 242 and the multiple second grilles 25 connected to it to rectify more gas, resulting in better noise reduction. The transition section 242 can also be configured in a wavy shape (e.g.,...). Figure 13 The wavy transition section 242 extends towards the central axis X. Understandably, while maintaining a constant length along the first direction Y, the wavy structure has a larger surface area, increasing the contact area between the transition section 242 and the airflow. This allows the transition section 242 and the multiple second grilles 25 connected to it to rectify more gas. Furthermore, because the wavy transition section 242 extends towards the central axis X, it has overlapping areas along the first direction Y. These overlapping areas connect with the multiple second grilles 25, forming multiple rectification ports 21. When the gas flows in a direction perpendicular to the central axis X, it can sequentially pass through the multiple rectification ports 21 formed by the transition section 242 and the second grilles 25, increasing the number of rectification ports 21 through which the gas passes. This further improves the multi-stage rectification and noise reduction effect of the hood, significantly enhancing the control of aerodynamic noise.

[0081] The first grille 24 may also include only the first segment 241 and the second segment 243 connected in sequence. Multiple second grilles 25 are connected to multiple first segments 241 and multiple second segments 243 to form multiple bends 23. The structure of the first grille 24 can be set as needed.

[0082] Please see Figure 14 and Figure 15 In conjunction with the above embodiments, in some embodiments, the surface of the first grille 24 and / or the second grille 25 is provided with a noise reduction structure 26, which is any one of a serrated structure, a raised structure, or a groove structure.

[0083] It is understandable that multiple noise reduction structures 26 can be provided on the first grille 24 or the second grille 25, or multiple noise reduction structures 26 can be provided on both the first grille 24 and the second grille 25 simultaneously. The noise reduction structures 26 can be located on any one or more sides of the first grille 24 and the second grille 25. The noise reduction structures 26 can further reduce the noise generated by the gas and the shroud 20. The noise reduction structures 26 can be any of the following: sawtooth structure, protrusion structure, and groove structure. By setting these structures, the large vortices generated on the surface of the first grille 24 and the second grille 25 can be transformed into smaller vortices, thereby reducing the vortex noise generated by the high-speed rotation of the fan and achieving the effect of noise reduction.

[0084] Please see Figure 16 and Figure 17 In conjunction with the above embodiments, in some embodiments, the angle between the first side 244 of each first grille 24 facing the adjacent first grille 24 and the horizontal plane is α, which satisfies: 0° < α < 90°.

[0085] It is understandable that the first grille 24 can be set in an inclined state, meaning that the angle α between the first side 244 of the first grille 24 and the horizontal plane is in the range of 0° < α < 90°; or, the first grille 24 is set in a circumferential spiral inclined position along the shroud 20, with an inclination angle of α, 0° < α < 90°. The inclined setting of the first grille 24 can further adapt to the direction of fan rotation. The inclined first grille 24 can change the path and speed of airflow, thereby reducing friction and vibration between the airflow and the shroud 20, reducing noise generation, and contributing to a quieter working environment. Simultaneously, the inclined setting of the first grille 24 changes the direction and speed of airflow, helping to optimize the airflow of the fan, making the fan's intake and exhaust smoother, improving the fan's efficiency and performance, while reducing energy loss.

[0086] Please see Figure 18 and Figure 19In conjunction with the above embodiments, in some embodiments, the height of the vertices on the first grid 24 gradually decreases or gradually increases along the direction perpendicular to the central axis X.

[0087] It is understandable that during the extension of the first grille 24, it has a highest position, i.e., a vertex. Defining the plane containing the bottom of the fairing 20 as the reference plane S, the distance from the highest position of the first grille 24 to the reference plane is the height h of the vertex (e.g., ...). Figure 19 Along a direction perpendicular to the central axis X, the height h of the apexes of the plurality of first grilles 24 on the fairing 20 gradually decreases or gradually increases, facilitating the setting of the top surface of the fairing 20 as an inclined surface. This allows the fairing 20 to rectify the flow in the inclined direction according to the needs of the operating conditions, better meeting user requirements. The inclination angle can also be set as needed, by adjusting the height difference between the plurality of first grilles 24.

[0088] Please see Figure 18 and Figure 20 In conjunction with the above embodiments, in some embodiments, the second grille 25 has two second side surfaces 251 arranged opposite to each other along a direction parallel to the central axis X, and the angle between the second side surface 251 and the horizontal plane is b, satisfying: 0° < b < 90°.

[0089] It is understandable that the second grille 25 has two opposing second sides 251 along a direction parallel to the central axis X. These two opposing second sides 251 can be considered parallel to each other, and the angle between the second side 251 and the horizontal plane is b, satisfying: 0° < b < 90°. In other words, the second grille 25 is also tilted, facilitating the overall tilting of the fairing 20. Depending on the operating conditions, the fairing 20 can be oriented in a specific direction to rectify the airflow in that direction, achieving noise reduction and better meeting usage requirements. The tilt angle can also be set as needed by adjusting the tilt angle of the second grille 25.

[0090] Please see Figure 21 In conjunction with the above embodiments, in some embodiments, the fairing 20 has an opening 27, the fairing 20 includes a protective part 28, the protective part 28 is disposed at the opening 27, and the protective part 28 has a through hole 281 communicating with the opening 27.

[0091] Understandably, the opening 27 is for facilitating gas flow, and its shape can be circular, elliptical, rectangular, polygonal, or other irregular. A protective section 28 can be installed inside the opening 27 to prevent debris from entering the fan and to prevent accidental hand contact that could cause injury. The protective section 28 can be a mesh or grid structure, with through holes 281 communicating with the opening 27. Multiple through holes 281 can be provided, and their shapes can be circular, elliptical, rectangular, polygonal, or other irregular, facilitating gas flow and reducing obstruction by the protective section 28.

[0092] Please see Figure 22 In conjunction with the above embodiments, a fan structure in this application includes a fan body 30, a base 10, and the aforementioned shroud 20. The base 10 is disposed on one side of the fan body 30, and the shroud 20 is disposed on the side of the base 10 opposite to the fan body 30.

[0093] Understandably, the fairing 20 can be mounted on the base 10 via bolts or welding. The base 10 is then mounted on the fan body 30 using bolts, clips, or other connecting structures. The fan body 30 and the fairing 20 are located on opposite sides of the base 10, facilitating connection between the fairing 20 and the fan body 30 via the base 10. A fan is installed inside the fan body 30. The fan's rotation allows external air to enter the fan body 30 through the fairing 20, or allows air within the fan body 30 to be discharged to the outside through the fairing 20. The fairing 20 can be circular, square, polygonal, elliptical, or other shapes, and the base 10 can also be circular, square, polygonal, elliptical, or other shapes to accommodate the fairing 20.

[0094] Please see Figure 22 , Figure 23 and Figure 24 In conjunction with the above embodiments, in some embodiments, the starting end 50 of the fairing 20 extends away from the direction of the fan body 30, and the ending end 60 of the fairing 20 extends towards the direction of the fan body 30 (e.g., Figure 23 Alternatively, the starting end 50 of the fairing 20 extends toward the fan body 30, and the ending end 60 of the fairing 20 extends away from the fan body 30 (e.g., Figure 24 ).

[0095] It is understood that the outermost edge of the fairing 20 is the starting end 50, which can be connected to the base 10, and the innermost edge is the ending end 60. The starting end 50 can extend in a direction away from the fan body 30 and towards the central axis X, so that the starting end 50 has a convex structure at the starting end 50 position. The angle between the extension direction of the starting end 50 and the horizontal direction is not limited. The ending end 60 of the fairing 20 extends towards the fan body 30, so that the fairing 20 has a concave structure at the ending end 60 position. This facilitates the partial overlap of the projections of at least two parts on the fairing 20 in the first direction Y, allowing the airflow along the first direction Y to pass through these at least two parts, which can rectify the airflow at least twice, increasing the number of rectifications and improving the rectification and noise reduction effect. Similarly, extending the starting end 50 of the shunting cover 20 toward the fan body 30, making the starting end 50 have a concave structure, and extending the ending end 60 of the shunting cover 20 away from the fan body 30, making the ending end 60 have a convex structure, also helps to partially overlap the projections of at least two parts on the shunting cover 20 in the first direction Y, so that the airflow along the first direction Y can pass through the at least two parts, and the airflow can be rectified at least twice, increasing the number of rectifications and improving the rectification and noise reduction effect.

[0096] Please see Figure 25 and Figure 26 In conjunction with the above embodiments, the present application provides a duct structure including a duct housing 40 and the aforementioned fan structure.

[0097] A fan mounting port 41 is provided on the air duct housing 40; the fan structure is set on the fan mounting port 41.

[0098] Understandably, airflow can circulate within the duct housing 40 of the duct structure. A fan mounting port 41 is provided on the duct housing 40, allowing the fan structure to be installed at the location of the fan mounting port 41. This ensures that the shunting shield 20 on the fan structure at least partially penetrates the fan mounting port 41 and is embedded inside the duct housing 40. When airflow from inside the duct housing 40 enters the fan structure, or vice versa, it must pass through the shunting shield 20 on the fan structure, thus achieving airflow rectification and noise reduction.

[0099] Please see Figure 25 and Figure 26 In conjunction with the above embodiments, in some embodiments, the fan mounting port 41 is located in the middle of the duct housing 40. An air inlet or outlet is provided at the end of the duct housing 40 away from the fan mounting port 41.

[0100] It is understandable that the fan mounting port 41 can be located in the middle of the duct housing 40, and the fan structure can also be located in the middle of the duct housing 40. One end of the duct housing 40 can be designated as an air inlet or outlet, or both ends of the duct housing 40 can be designated as air inlets or outlets. If the airflow is like... Figure 24 As shown, air enters from the inlets at both ends of the duct housing 40, passes through the rectifier 20, and exits from the bottom of the fan body 30. Because the fan structure is located in the middle of the duct housing 40, the airflow velocity after passing through the rectifier 20 is relatively low, resulting in less noise. If the airflow is as follows... Figure 25 As shown, the air enters from the bottom of the fan body 30 and exits from both ends of the duct housing 40. Since the fan structure is located in the middle of the duct housing 40, the airflow takes a long time to reach the outlets at both ends of the duct housing 40, and the flow velocity will be reduced, resulting in less noise when the airflow is discharged, which can also achieve the effect of noise reduction.

[0101] 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.

[0102] The fairing, fan structure, and duct structure provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are 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 (20), characterized in that, include: Multiple bends (23), at least two of the bends (23) are sequentially nested, and each bend (23) is provided with a flow port (21); In the first direction (Y), the projections of at least two of the plurality of bending portions (23) overlap.

2. The fairing (20) according to claim 1, characterized in that, In the first direction (Y), the projections of the rectifier ports (21) on at least two of the bends (23) completely overlap; Alternatively, in the first direction (Y), the projected portions of the rectifier ports (21) on at least two of the bends (23) overlap; Alternatively, in the first direction (Y), the projections of the rectifier ports (21) on at least two of the bends (23) are completely offset.

3. The fairing (20) according to claim 1, characterized in that, The fairing (20) includes a middle portion (22) disposed between two adjacent bends (23). At least a portion of the middle portion (22) is a protruding structure, or at least a portion of the middle portion (22) is a recessed structure, or at least a portion of the middle portion (22) extends along the first direction (Y).

4. The fairing (20) according to claim 3, characterized in that, Along the first direction (Y), the middle portion (22) extends in any one of the following shapes: arc-shaped, wavy, and straight.

5. The fairing (20) according to claim 3, characterized in that, The fairing (20) is formed by a plurality of first grilles (24) and a plurality of second grilles (25) interlaced. The plurality of first grilles (24) are arranged radially at intervals around the central axis (X). The second grilles (25) are all arranged circumferentially around the central axis (X) and connected to the plurality of first grilles (24). The plurality of first grilles (24) and the plurality of second grilles (25) intertwine to form a plurality of fairing ports (21).

6. The fairing (20) according to claim 5, characterized in that, The surface of the first grille (24) and / or the second grille (25) is provided with a noise reduction structure (26), which is any one of a sawtooth structure, a raised structure, or a groove structure.

7. The fairing (20) according to claim 5, characterized in that, The angle between the first side (244) of each of the first grilles (24) facing the adjacent first grille (24) and the horizontal plane is α, which satisfies: 0° < α < 90°.

8. The fairing (20) according to claim 5, characterized in that, Along a direction perpendicular to the central axis (X), the height of the vertices on the first grid (24) gradually decreases or gradually increases.

9. The fairing (20) according to claim 5, characterized in that, The second grille (25) has two opposite second sides (251) arranged in a direction parallel to the central axis (X), and the angle between the second side (251) and the horizontal plane is b, satisfying: 0° < b < 90°.

10. The fairing (20) according to claim 1, characterized in that, The fairing (20) has an opening (27), and the fairing (20) includes a protective part (28), which is disposed at the opening (27) and has a through hole (281) communicating with the opening (27).

11. A fan structure, characterized in that, include: Fan body (30); A base (10) is disposed on one side of the fan body (30); The fairing (20) according to any one of claims 1 to 10, wherein the fairing (20) is disposed on the side of the base (10) opposite to the fan body (30).

12. The fan structure according to claim 11, characterized in that, The starting end (50) of the fairing (20) extends away from the fan body (30), and the ending end (60) of the fairing (20) extends toward the fan body (30). Alternatively, the starting end (50) of the fairing (20) extends toward the fan body (30), and the ending end (60) of the fairing (20) extends away from the fan body (30).

13. A duct structure, characterized in that, Includes a duct housing (40) and a fan structure as described in claim 11 or 12; The air duct housing (40) is provided with a fan mounting port (41); the fan structure is provided on the fan mounting port (41).

14. The air duct structure according to claim 13, characterized in that, The fan mounting port (41) is located in the middle of the air duct housing (40); The end of the duct housing (40) away from the fan mounting port (41) is provided with an air inlet or an air outlet.

Images