Fan device and electronic device

Abstract

The embodiment of the present application provides a fan device and electronic equipment, the fan device comprises a moving blade assembly and a guide vane assembly located on one side of the air outlet of the moving blade assembly, wherein the moving blade assembly comprises a plurality of rotating blades and a driving mechanism for driving the plurality of rotating blades to rotate; characterized in that the guide vane assembly comprises a first frame, a plurality of guide vanes and a plurality of automatic adjusting structures, wherein the plurality of guide vanes are located on the inner side of the first frame and are movably connected with the first frame; each automatic adjusting structure is connected with each guide vane in one-to-one correspondence, and each automatic adjusting structure is used for automatically adjusting the installation angle of the corresponding guide vane according to the wind power at the air outlet of the first frame. The fan device and electronic equipment provided by the embodiment of the present application can not only ensure the airflow matching of the rotating blades and the guide vanes in the whole working section, but also can reduce the discrete noise caused by the interference between the rotating blades and the guide vanes.

Description

Technical Field

[0001] This invention relates to the field of electronic communication technology, and more specifically, to a fan device and electronic equipment. Background Technology

[0002] With the rapid development of the electronic communication field, the performance of carrier, fixed network, wireless baseband processing unit (BBU), server storage, energy products and other products is constantly improving, resulting in an increase of about 20% in the power consumption of each generation of products. In order to meet the heat dissipation requirements of air-cooled products, the fan speed needs to be increased accordingly, but this will lead to increased noise of the whole machine, thus making it difficult to reduce fan noise. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art, and proposes a fan device and electronic equipment that can not only ensure airflow matching between the rotating blades and the guide blades throughout the entire working section and improve fan efficiency, but also reduce discrete noise caused by interference between the rotating blades and the guide blades, thereby improving the overall heat dissipation performance.

[0004] To achieve the purpose of this invention, a fan device is provided, including a moving blade assembly and a guide vane assembly located on the air outlet side of the moving blade assembly, wherein the moving blade assembly includes a plurality of rotating blades and a drive mechanism for driving the plurality of rotating blades to rotate; the guide vane assembly includes a first frame, a plurality of guide vanes and a plurality of automatic adjustment structures, wherein the plurality of guide vanes are all located inside the first frame and are movably connected to the first frame;

[0005] Each of the automatic adjustment structures is connected to each of the guide vanes in a one-to-one correspondence. Each automatic adjustment structure is used to automatically adjust the installation angle of the corresponding guide vane according to the wind force at the air outlet of the first frame.

[0006] Optionally, each of the automatic adjustment structures includes a wind shield and a transmission mechanism, wherein the wind shield is located on the air outlet side of the first frame and is movably connected to the first frame, and a portion of the wind shield protrudes from the inner sidewall of the first frame toward the inner side of the first frame so as to be able to move axially along the air outlet of the first frame under the action of wind.

[0007] The transmission mechanism is movably connected to the wind turbine cover and the corresponding guide vane, respectively, and is used to drive the guide vane to rotate when the wind turbine cover moves, so as to change the installation angle.

[0008] Optionally, the transmission mechanism includes a first connecting rod, a second connecting rod, an elastic element, and a limiting structure. A limiting groove is provided on the first frame, extending through the inner and outer sides of the first frame. The first connecting rod passes through the limiting groove and is movable along its extension direction. One end of the first connecting rod is connected to the guide vane, and the other end of the first connecting rod is movably connected to one end of the second connecting rod. The other end of the second connecting rod is movably connected to the wind turbine cover.

[0009] The limiting structure is disposed on the first frame and is movably connected to the wind turbine cover, so as to limit the wind turbine cover to move axially along the air outlet of the first frame within a preset range of movement;

[0010] The elastic element is connected to the first frame and the wind turbine cover respectively, and is used to apply an elastic force to the wind turbine cover to reset it to its initial position.

[0011] Optionally, the extending direction of the limiting groove is arc-shaped, and one end of the limiting groove is closer to the air outlet of the first frame than the other end.

[0012] Optionally, the limiting structure includes a connector and at least one limiting rod, wherein the connector is located outside the first frame and connected to the wind turbine cover, and at least one guide through hole is provided on the connector;

[0013] The limiting rod is connected to the first frame and is inserted into the guide through hole in a one-to-one correspondence. The limiting rod can move relative to the corresponding guide through hole when the wind turbine moves.

[0014] Optionally, the end of the first frame where the air outlet is located is provided with a boss that protrudes from the outer side wall of the first frame toward the outer side of the first frame, and the wind shield is stacked with the boss when it is in the initial position; and a through hole is provided on the boss that extends through the boss along the axial direction of the air outlet of the first frame, so that the connector can pass through and extend to the location of the limiting rod.

[0015] Optionally, the elastic element includes a tension spring, the axis of which is parallel to the axial direction of the air outlet of the first frame.

[0016] Optionally, the guide vane assembly further includes a first hub, with a plurality of guide vanes arranged around the first hub; each guide vane includes a vane body, a first fixing rod, and a second fixing rod, wherein,

[0017] The first fixing rod is arranged radially along the first hub, and the two ends of the first fixing rod are respectively movably connected to the blade body and the first hub, so that the blade body can rotate around the first fixing rod;

[0018] The second fixing rod is coaxially arranged with the first fixing rod, and the two ends of the second fixing rod are respectively movably connected to the blade body and the first frame.

[0019] Optionally, the moving blade assembly further includes a second frame and a second hub disposed inside the second frame, wherein the second frame is fixedly connected to the first frame;

[0020] The plurality of rotating blades are arranged around and connected to the second hub; the drive mechanism is connected to the second hub to drive the plurality of rotating blades to rotate through the second hub.

[0021] As another technical solution, embodiments of the present invention also provide an electronic device, including the fan device described above in embodiments of the present invention.

[0022] The embodiments of the present invention have the following beneficial effects:

[0023] The fan device provided in this embodiment of the invention features multiple automatic adjustment structures connected to multiple guide vanes. Each automatic adjustment structure automatically adjusts the installation angle of the corresponding guide vane according to the wind force at the air outlet of the first frame. This allows the guide vane's angle of attack to be optimally adjusted whenever the rotational speed of the rotating blades changes. This not only ensures airflow matching between the rotating blades and guide vanes throughout the entire operating range, reducing airflow loss and improving fan efficiency, but also avoids airflow separation at the suction surface of the guide vanes. This reduces discrete noise caused by airflow interference between the rotating blades and guide vanes, thereby improving the overall heat dissipation performance.

[0024] The electronic device provided in this embodiment of the invention, by employing the fan device provided in this embodiment of the invention, can not only ensure airflow matching between the rotating blades and the guide blades throughout the entire working section, reducing airflow loss and thus improving fan efficiency; but also avoid the problem of airflow separation on the suction surface of the guide blades, thereby reducing discrete noise caused by interference between the rotating blades and the guide blades, and thus improving the overall heat dissipation performance. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the fan device provided in an embodiment of the present invention;

[0026] Figure 2This is a structural diagram of the guide vane assembly used in an embodiment of the present invention on the air outlet side;

[0027] Figure 3 This is a side view of the guide vane assembly used in an embodiment of the present invention;

[0028] Figure 4 This is a partial structural diagram of the guide vane assembly used in an embodiment of the present invention;

[0029] Figure 5 This is a partial cross-sectional view of the guide vane assembly used in an embodiment of the present invention;

[0030] Figure 6 This is a partial cross-sectional view of the wind shield and the first frame used in an embodiment of the present invention;

[0031] Figure 7 This is a structural diagram of the guide vane used in an embodiment of the present invention;

[0032] Figure 8 This is a diagram showing the state of the transmission mechanism used in this embodiment of the invention when the wind turbine is in two different positions. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions of the present invention, the fan device and electronic equipment provided in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0035] Please see Figure 1 and Figure 2 This invention provides a fan device, including a moving blade assembly 1 and a guide vane assembly 2 located on one side of the air outlet of the moving blade assembly 1. The moving blade assembly 1 includes multiple rotating blades 11 and a drive mechanism (not shown) for driving the multiple rotating blades 11 to rotate. The guide vane assembly 2 includes a first frame 21, multiple guide vanes 23, and multiple automatic adjustment structures, wherein, as... Figure 2 As shown, multiple guide vanes 23 are located inside the first frame 21 and are movably connected to the first frame 21.

[0036] In some alternative embodiments, such as Figure 1 As shown, the guide vane assembly 1 also includes a second frame 13 and a second hub 12 disposed inside the second frame 13. The second frame 13 is located on the air inlet side of the first frame 21 and is fixedly connected to the first frame 21. The first frame 21 and the second frame 13 respectively define channels for gas flow on their inner sides. Multiple rotating blades 11 are arranged around and connected to the second hub 12. The aforementioned drive mechanism is connected to the second hub 12 to drive the multiple rotating blades 11 to rotate via the second hub 12. This drive mechanism is, for example, a rotary motor. Driven by the drive mechanism, the multiple rotating blades 11 rotate to generate airflow, which flows towards the guide vane assembly 2 in the direction of airflow. Figure 1 The X direction is shown in the figure.

[0037] In practical applications, the number of rotating blades 11 is generally two or more. In some optional embodiments, the two or more rotating blades 11 are evenly distributed in the circumferential direction of the second hub 12. This ensures the uniformity of load-bearing in the circumferential direction of the second hub 12 connected to each rotating blade 11, thereby improving structural stability. For example, the number of rotating blades 11 can be two, three, four, five, six, etc. Taking six rotating blades 11 as an example... Figure 1 As shown, the six rotating blades 11 are evenly distributed in the circumferential direction of the second hub 12.

[0038] In practical applications, the number of guide vanes 23 is generally two or more. In some optional embodiments, the number of guide vanes 23 is the same as the number of rotating vanes 11. Of course, in practical applications, the number of guide vanes 23 may be less or more than the number of rotating vanes 11 depending on different needs. The embodiments of the present invention do not have any particular limitations on this.

[0039] In some alternative embodiments, such as Figure 2 As shown, the guide vane assembly 2 also includes a first hub 25, around which a plurality of guide vanes 23 are arranged; and, as Figure 7As shown, each guide vane 23 includes a vane body 231, a first fixing rod 232, and a second fixing rod 233. The first fixing rod 232 is arranged radially along the first hub 25 (i.e., in the diametrical direction passing through the center of the radial section of the first hub 25), and its two ends are movably connected to the vane body 231 and the first hub 25, respectively, so that the vane body 231 can rotate around the first fixing rod 232. The second fixing rod 233 is coaxially arranged with the first fixing rod 232, and its two ends are movably connected to the vane body 231 and the first frame 21, respectively. That is, the first fixing rod 232 and the second fixing rod 233 can be used as the rotation axis of the vane body 231, and the vane body 231 can rotate around the rotation axis to change the angle between the vane body 231 (e.g., the suction surface) and the radial section of the first hub 25 (hereinafter referred to as the installation angle of the guide vane).

[0040] In some alternative embodiments, the inner diameters of the first frame 21 and the second frame 13 are the same, and the first hub 25 and the second hub 12 are coaxially arranged.

[0041] Each automatic adjustment structure is connected to each guide vane 23 in a one-to-one correspondence. Each automatic adjustment structure is used to automatically adjust the installation angle of the corresponding guide vane 23 according to the wind force at the air outlet of the first frame 21. That is, under the adjustment of the automatic adjustment structure, the installation angle of the guide vane 23 can change with the wind force at the air outlet of the first frame 21. As can be seen from the blade velocity triangle, when the rotational speed of the rotating blade 11 increases, its circumferential velocity will increase, thereby causing the air intake angle of the guide vane 23 to increase. If the installation angle of the guide vane 23 remains unchanged, the air intake angle of the guide vane 23 will increase, resulting in airflow separation on the suction surface of the guide vane 23. This situation will not only increase airflow loss and reduce fan efficiency, but also cause an increase in discrete noise due to airflow interference between the rotating blade 11 and the guide vane 23. To address this issue, the fan device provided in this embodiment of the invention utilizes the aforementioned automatic adjustment structure to automatically adjust the installation angle of the corresponding guide vane 23 based on the wind force at the air outlet of the first frame 21. This allows the guide vane 23 to maintain its optimal angle of attack whenever the rotational speed of the rotating blade 11 changes. This not only ensures airflow matching between the rotating blade 11 and the guide vane 23 throughout the entire operating range, reducing airflow loss and improving fan efficiency, but also prevents airflow separation at the suction surface of the guide vane 23. This reduces discrete noise caused by airflow interference between the rotating blade 11 and the guide vane 23, thereby improving the overall heat dissipation performance.

[0042] In some alternative embodiments, such as Figure 1and Figure 2 As shown, each automatic adjustment structure includes a wind turbine 24 and a transmission mechanism 22, wherein, as Figure 3 As shown, the wind turbine cover 24 is located on the air outlet side of the first frame 21 and is movably connected to the first frame 21, and, as... Figure 6 As shown, a portion of the wind turbine cover 24 protrudes from the inner wall of the first frame 21 toward the inner side of the first frame 21, so that it can move along the axial direction of the air outlet of the first frame 21 under the action of wind (i.e., Figure 1 The wind turbine 24 can move in the X direction. Optionally, the wind turbine 24 is an annular cover with an inner diameter smaller than that of the first frame 21, so that the inner part of the annular cover can protrude from the inner wall of the first frame 21. Of course, in practical applications, the wind turbine 24 can also be any other structure, as long as it can move under the action of wind.

[0043] The aforementioned transmission mechanism 22 is movably connected to the wind turbine cover 24 and the corresponding guide vane 23, respectively, and is used to drive the guide vane 23 to rotate when the wind turbine cover 24 moves, thereby changing its installation angle. When the wind turbine cover 24 moves under the action of wind, the power generated by the movement of the wind turbine cover 24 is converted into rotational power through the aforementioned transmission mechanism 22 and transmitted to the guide vane 23, thereby realizing the automatic adjustment of the installation angle of the guide vane 23. Moreover, the magnitude of the displacement of the wind turbine cover 24 determines the amount of change in the installation angle of the guide vane 23.

[0044] The structure of the aforementioned transmission mechanism 22 can be varied, for example, as follows: Figures 3 to 5 As shown, the aforementioned transmission mechanism includes a first connecting rod 227, a second connecting rod 223, an elastic element 221, and a limiting structure. A limiting groove 226 is provided on the first frame 21, extending through the inner and outer sides of the first frame 21. The first connecting rod 227 passes through the limiting groove 226 and is movable along the extending direction of the limiting groove 226. Furthermore, as... Figure 5 As shown, one end of the first link 227 is connected to the guide vane 23, and the other end of the first link 227 is movably connected to one end of the second link 223; the other end of the second link 223 is movably connected to the wind turbine cover 24.

[0045] In some alternative embodiments, such as Figure 5As shown, one end of the first connecting rod 227 is located inside the first frame 21 and is threadedly connected to the guide vane 23. The other end passes through the limiting groove 226 from the inside to the outside and extends to the outside of the first frame 21, where it is movably connected to the second connecting rod 223. The movable connection between the first connecting rod 227 and the second connecting rod 223 can be, for example, a hinge. Specifically, a mounting hole is provided on the second connecting rod 223, through which the first connecting rod 227 passes and can rotate within the mounting hole. A limiting part is provided at the end of the first connecting rod 227 near the mounting hole to prevent the second connecting rod 223 from disengaging from the first connecting rod 227. Of course, in practical applications, any other method can be used to achieve the movable connection between the first connecting rod 227 and the second connecting rod 223.

[0046] The aforementioned limiting structure is disposed on the first frame 21 and is movably connected to the wind turbine 24, thereby limiting the axial movement of the wind turbine 24 along the air outlet of the first frame 21 within a preset range of movement (i.e., Figure 3 The wind turbine 24 moves in the X direction, meaning the aforementioned limiting structure is used to limit the direction and range of movement of the wind turbine 24. In some optional embodiments, such as... Figure 3 As shown, the second link 223 is movably connected to the wind turbine 24 through the limiting structure. However, the embodiments of the present invention are not limited to this. In practical applications, the second link 223 can also be directly movably connected to the wind turbine 24.

[0047] In some alternative embodiments, such as Figure 3 As shown, the aforementioned limiting structure includes a connector 222 and two limiting rods 224. The connector 222 is located on the outside of the first frame 21 and is connected to the wind turbine cover 24. The connection method is, for example, welding or integral molding, etc., and two guide through holes 225 are provided on the connector 222. Figure 4 and Figure 5 As shown, each limiting rod 224 is connected to the first frame 21 and is correspondingly inserted into each guide through hole 225. The limiting rod 224 can move relative to the corresponding guide through hole 225 when the wind turbine cover 24 moves. Optionally, such as... Figure 3 As shown, the aforementioned guide hole 225 is, for example, an elongated hole, and the major axis of the elongated hole is perpendicular to the direction of the major axis. Figure 3 The X-direction of the holes is parallel to each other, and the limiting rod 224 can move along the major axis of the elongated hole, thereby limiting the movement direction of the wind turbine 24 to the X-direction. Furthermore, the length of the elongated hole along its major axis limits the movement range of the wind turbine 24. It should be noted that the number of limiting rods 224 is not limited to two in this embodiment. In practical applications, depending on specific needs, the number of limiting rods 224 can be one or more.

[0048] Optionally, one end of the aforementioned limiting rod 224 is threadedly connected to the first frame 21, and the other end is provided with a limiting part to prevent it from detaching from the connecting member 222.

[0049] It should be noted that in this embodiment, the number of connectors 222 is the same as the number of guide vanes 23, and they correspond one-to-one. However, the embodiments of the present invention are not limited to this. In practical applications, the connectors 222 can also adopt an integral structure, that is, multiple connectors 222 are connected as one, for example, a ring structure.

[0050] The aforementioned elastic element 221 is connected to both the first frame 21 and the wind turbine 24, and is used to apply a spring force to the wind turbine 24 to reset it to its initial position. Specifically, the elastic element 221 is connected to the connector 222, so that the wind turbine 24 is reset via the connector 222. The reset direction of the wind turbine 24 is... Figure 3 The X direction is opposite, and the initial position of the wind shield 24 is the position where it contacts the end of the first frame 21 where the air outlet is located.

[0051] In some alternative embodiments, such as Figure 3 As shown, the elastic element 221 includes a tension spring, the axis of which is parallel to the axial direction (i.e., the X direction) of the air outlet of the first frame 21. This arrangement ensures that the direction of the elastic force applied by the tension spring to the wind turbine cover 24 is parallel to the X direction, thereby guaranteeing that the wind turbine cover 24 can smoothly return to its original position.

[0052] In some alternative embodiments, such as Figure 5 As shown, the end of the first frame 21 where the air outlet is located is provided with a boss 211 protruding from the outer side wall of the first frame 21 towards the outside of the first frame 21. When the wind shield 24 is in the above-mentioned initial position, it is stacked with the boss 211. Furthermore, a through hole is provided on the boss 211 along the axial direction (i.e., the X direction) of the air outlet of the first frame 21, so that the connecting member 222 can pass through and extend to the position of the limiting rod 224.

[0053] In some alternative embodiments, such as Figure 3 As shown, the limiting groove 226 extends in an arc shape, and one end of the limiting groove 226 is closer to the air outlet of the first frame 21 than the other end. This arrangement can guide the rotation direction of the guide vane 23. Of course, in practical applications, the limiting groove 226 can also adopt any other shape, as long as the guide vane 23 can rotate.

[0054] Please see Figure 8 When the wind turbine 24 is not subjected to wind or the wind force is insufficient to move the wind turbine 24, the wind turbine 24 remains in its initial position, i.e., in the position shown below. Figure 8At position a1 shown in Figure (a), connector 222 is located at position b1 shown in Figure (a), and first connecting rod 227 is located at the end of limiting groove 226 away from the air outlet of first frame 21, i.e., at position c1 shown in Figure (a). In this case, the installation angle of guide vane 23 is at the initial angle, which can be freely set according to specific needs. When the wind force acting on wind shield 24 can drive wind shield 24 to move, wind shield 24 moves from the above initial position along the direction away from the air outlet of first frame 21 (i.e., the X direction). For example, the position corresponding to the maximum displacement of wind shield 24 is located at... Figure 8 As shown in Figure (b), at position a2, during this process, the wind shield 24 drives the connector 222 to move synchronously from position b1 relative to the limit rod 224 along the X direction until it reaches the position shown in Figure (b). Figure 8 At position b2 shown in Figure (b), the first link 227 moves counterclockwise along the limiting groove 226 (i.e., along...). Figure 8 (Move in the Y direction) until it is located at the end of the limiting groove 226 near the air outlet of the first frame 21, that is, at position c2 as shown in Figure (a). In this case, the installation angle of the guide vane 23 rotates a certain angle from the initial angle mentioned above. Thus, the installation angle of the guide vane 23 is automatically adjusted.

[0055] It should be noted that in practical applications, the adjustable range of the installation angle of the guide vane 23 can be set by designing the position of the limiting groove 226 on the first frame 21 and the extension arc length of the limiting groove 226, and the position and size of other components can be adjusted accordingly.

[0056] In summary, the fan device provided in this embodiment of the invention, by setting multiple automatic adjustment structures and connecting them one-to-one with multiple guide vanes, allows each automatic adjustment structure to automatically adjust the installation angle of the corresponding guide vane according to the wind force at the air outlet of the first frame. This automatic adjustment ensures that the air intake angle of the guide vane is always optimal when the rotational speed of the rotating blade changes. This not only guarantees airflow matching between the rotating blade and the guide vane throughout the entire operating range, reducing airflow loss and improving fan efficiency, but also avoids airflow separation on the suction surface of the guide vane, thereby reducing discrete noise caused by airflow interference between the rotating blade and the guide vane, and ultimately improving the overall heat dissipation performance.

[0057] As another technical solution, embodiments of the present invention also provide an electronic device, which includes the fan device described above in embodiments of the present invention.

[0058] The electronic devices provided in the embodiments of the present invention are, for example, carrier networks, fixed networks, wireless baseband processing units (BBUs), server storage, energy products, etc.

[0059] The electronic device provided in this embodiment of the invention, by employing the fan device provided in this embodiment of the invention, can not only ensure airflow matching between the rotating blades and the guide blades throughout the entire working section, reducing airflow loss and thus improving fan efficiency; but also avoid the problem of airflow separation on the suction surface of the guide blades, thereby reducing discrete noise caused by interference between the rotating blades and the guide blades, and thus improving the overall heat dissipation performance.

[0060] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A fan device, characterized in that, The device includes a moving blade assembly and a guide vane assembly located on one side of the air outlet of the moving blade assembly. The moving blade assembly includes multiple rotating blades and a drive mechanism for driving the multiple rotating blades to rotate. The guide vane assembly includes a first frame, multiple guide vanes and multiple automatic adjustment structures. The multiple guide vanes are all located inside the first frame and are movably connected to the first frame. Each of the automatic adjustment structures is connected to each of the guide vanes in a one-to-one correspondence. Each automatic adjustment structure is used to automatically adjust the installation angle of the corresponding guide vane according to the wind force at the air outlet of the first frame. Each of the aforementioned automatic adjustment structures includes a wind shield and a transmission mechanism, wherein the wind shield is located on the air outlet side of the first frame and is movably connected to the first frame, and a portion of the wind shield protrudes from the inner sidewall of the first frame toward the inner side of the first frame so as to be able to move axially along the air outlet of the first frame under the action of wind. The transmission mechanism is movably connected to the wind turbine cover and the corresponding guide vane, respectively, and is used to drive the guide vane to rotate when the wind turbine cover moves, so as to change the installation angle.

2. The fan device according to claim 1, characterized in that, The transmission mechanism includes a first connecting rod, a second connecting rod, an elastic element, and a limiting structure. A limiting groove is provided on the first frame, extending through the inner and outer sides of the first frame. The first connecting rod passes through the limiting groove and is movable along the extending direction of the limiting groove. One end of the first connecting rod is connected to the guide vane, and the other end of the first connecting rod is movably connected to one end of the second connecting rod. The other end of the second connecting rod is movably connected to the wind turbine cover. The limiting structure is disposed on the first frame and is movably connected to the wind turbine cover, so as to limit the wind turbine cover to move axially along the air outlet of the first frame within a preset range of movement; The elastic element is connected to the first frame and the wind turbine cover respectively, and is used to apply an elastic force to the wind turbine cover to reset it to its initial position.

3. The fan device according to claim 2, characterized in that, The limiting groove extends in an arc shape, and one end of the limiting groove is closer to the air outlet of the first frame than the other end.

4. The fan device according to claim 2, characterized in that, The limiting structure includes a connector and at least one limiting rod, wherein the connector is located on the outside of the first frame and connected to the wind turbine cover, and at least one guide through hole is provided on the connector; The limiting rod is connected to the first frame and is inserted into the guide through hole in a one-to-one correspondence. The limiting rod can move relative to the corresponding guide through hole when the wind turbine moves.

5. The fan device according to claim 4, characterized in that, The end of the first frame where the air outlet is located is provided with a boss that protrudes from the outer side wall of the first frame toward the outer side of the first frame. When the wind shield is in the initial position, it is stacked with the boss. Furthermore, a through hole is provided on the boss that extends through the boss along the axial direction of the air outlet of the first frame, so that the connector can pass through and extend to the location of the limiting rod.

6. The fan device according to claim 2, characterized in that, The elastic element includes a tension spring, the axis of which is parallel to the axis of the air outlet of the first frame.

7. The fan device according to any one of claims 1-6, characterized in that, The guide vane assembly further includes a first hub, and a plurality of guide vanes are arranged around the first hub; each guide vane includes a vane body, a first fixing rod, and a second fixing rod, wherein, The first fixing rod is arranged radially along the first hub, and the two ends of the first fixing rod are respectively movably connected to the blade body and the first hub, so that the blade body can rotate around the first fixing rod; The second fixing rod is coaxially arranged with the first fixing rod, and the two ends of the second fixing rod are respectively movably connected to the blade body and the first frame.

8. The fan device according to any one of claims 1-6, characterized in that, The moving blade assembly further includes a second frame and a second hub disposed inside the second frame, wherein the second frame is fixedly connected to the first frame; The plurality of rotating blades are arranged around and connected to the second hub; the drive mechanism is connected to the second hub to drive the plurality of rotating blades to rotate through the second hub.

9. An electronic device, characterized in that, Includes the fan device as described in any one of claims 1-8.

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