A heat dissipation device

Abstract

The application discloses a heat dissipation device for dissipating heat of devices in an inverter, comprising a fan, the fan comprising a frame member and a fan blade member; the frame member comprises an outer frame and a supporting part connected to the outer frame; the fan blade member comprises an inner frame, a plurality of blades and a shaft core; the inner frame is in a cylindrical structure and is arranged opposite to the outer frame along the axial direction of the fan; the plurality of blades are connected to the inner circumferential surface of the inner frame and extend from the inner circumferential surface of the inner frame to the center of the fan blade member; and the shaft core is rotatably connected to the supporting part to rotate the fan blade member relative to the frame member. The blades of the fan blade member are connected to the inner circumferential surface of the inner frame, thereby facilitating the avoidance of the generation of a gap between the blades and the inner frame, reducing the risk of the blades being stuck, improving the operation reliability of the fan in a harsh environment, and further improving the reliability of the heat dissipation device.

Description

Technical Field

[0001] This application relates to the field of air-cooled heat dissipation technology, and in particular to a heat dissipation device. Background Technology

[0002] For electrical equipment, such as inverters and distribution cabinets, heat dissipation devices are often installed at the bottom or sides of the equipment to facilitate heat dissipation. The most common type of heat dissipation device is the air-cooled heat dissipation device, which involves installing one or more cooling fans at the bottom or side of the equipment to dissipate heat.

[0003] However, in related technologies, there is a gap between the outer edge of the fan blades of the heat dissipation device and the inner wall of the frame. For electrical equipment installed in the external environment, when foreign objects such as sand or gravel fall into the gap, the entire impeller may be stuck by the foreign objects, thus preventing the fan from working properly and adversely affecting the heat dissipation effect of the heat dissipation device. Utility Model Content

[0004] One object of this application is to provide a heat dissipation device that can solve or at least partially alleviate at least one of the defects in the above-mentioned background art.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a heat dissipation device for dissipating heat from components in an inverter, comprising: a fan, the fan comprising: a frame, the frame comprising an outer frame and a support portion connected to the outer frame; a fan blade, the fan blade comprising an inner frame, a plurality of blades and a shaft core; the inner frame having a cylindrical structure, the inner frame and the outer frame being disposed opposite to each other along the axial direction of the fan; the plurality of blades being connected to the inner circumferential surface of the inner frame and extending from the inner circumferential surface of the inner frame to the center of the fan blade; the shaft core being rotatably connected to the support portion, so that the fan blade is rotated relative to the frame.

[0006] As a preferred embodiment, the outer frame includes an annular rim extending toward the fan blades along the axial direction of the fan, and at least a portion of the rim is disposed opposite to the inner circumferential surface of the inner frame along the radial direction of the fan.

[0007] Preferably, the inner frame is larger in dimension along the axial direction of the fan than the blades are in dimension along the axial direction of the fan.

[0008] As a preferred embodiment, the fan blade further includes a mounting portion, the inner frame surrounds the outer periphery of the mounting portion, and a plurality of blades connect the inner frame and the mounting portion; the mounting portion has a receiving groove extending along the axial direction of the fan; the inner periphery of the receiving groove is adapted to mount a magnetic sleeve of the drive assembly; the shaft core is fixed to the mounting portion, and the support portion of the frame extends into the receiving groove so as to be rotatably inserted into the shaft core.

[0009] As a preferred embodiment, the mounting portion includes a peripheral wall and a bottom wall, the peripheral wall having a cylindrical structure, the bottom wall being connected to the end of the peripheral wall to define the receiving groove between the peripheral wall and the bottom wall, and the shaft core being fixed to the bottom wall; the fan also includes a reinforcing member embedded in the mounting portion, at least a portion of the reinforcing member being located on the bottom wall and surrounding the shaft core.

[0010] As a preferred embodiment, the reinforcing member includes a first reinforcing portion, a second reinforcing portion, and a third reinforcing portion; the first reinforcing portion is cylindrical and disposed on the peripheral wall; the second reinforcing portion is annular and disposed on the bottom wall; the third reinforcing portion is cylindrical and connected to the inner edge of the second reinforcing portion, and the third reinforcing portion extends toward the frame member to surround the shaft core.

[0011] As a preferred embodiment, the third reinforcing portion includes a first segment and a second segment; the first segment is connected to the inner edge of the second reinforcing portion and extends toward the frame member; the second segment is connected to the end of the first segment away from the second reinforcing portion, and the second segment extends rotatably away from the frame member from the first segment, wherein the first segment is located on the outer periphery of the second segment, and the second segment is arranged around the shaft core.

[0012] As a preferred embodiment, the outer frame further includes a first frame portion, a second frame portion, and a plurality of spokes. The first frame portion is located on the outer periphery of the second frame portion, and the plurality of spokes connect the first frame portion and the second frame portion. The first frame portion and the inner frame of the fan blade are disposed opposite to each other along the axial direction of the fan. The surrounding edge is connected to the first frame portion and extends from the first frame portion toward the inner frame, so as to be disposed opposite to the inner frame along the radial direction of the fan. The second frame portion and the mounting portion of the fan blade are disposed opposite to each other along the axial direction of the fan, so as to cover the receiving groove. The second frame portion can be connected to the support portion.

[0013] As a preferred embodiment, the fan further includes a bearing disposed between the shaft and the support portion to support the rotation of the shaft.

[0014] As a preferred embodiment, the heat dissipation device further includes a housing and a plurality of heat dissipation components connected to the device; the housing has a sealing cavity and a heat dissipation cavity, the sealing cavity and the heat dissipation cavity being separated, the sealing cavity accommodating the device, and the heat dissipation cavity accommodating the heat dissipation components and the fan, the fan being located below or to the side of the heat dissipation components.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: Compared to traditional fan blades where there is a gap between the blades and the inner wall of the frame, in this application, the blades of the fan blade are connected to the inner circumferential surface of the inner frame. This helps to avoid gaps between the outer edge of the blades and the inner frame, thereby reducing the risk of the blades getting stuck, improving the operational reliability of the fan in harsh environments, and thus improving the reliability of the heat dissipation device. Attached Figure Description

[0016] Figure 1 This is a 3D schematic diagram of a fan based on related technologies.

[0017] Figure 2 This is a front view of a fan based on related technology.

[0018] Figure 3 This is a perspective view of the front of a fan according to some embodiments of this application.

[0019] Figure 4 This is a perspective view of the back of a fan according to some embodiments of this application.

[0020] Figure 5 This is a cross-sectional view of a fan according to some embodiments of this application.

[0021] Figure 6 This is a perspective view of a fan blade component according to some embodiments of this application.

[0022] Figure 7 This is a perspective view of a fan reinforcement according to some embodiments of this application.

[0023] Figure 8 This is a cross-sectional view of a fan reinforcement according to some embodiments of this application.

[0024] Figure 9 This is a perspective view of a fan frame according to some embodiments of this application.

[0025] Figure 10 This is a front view of a heat dissipation device according to some embodiments of this application.

[0026] Figure 11 This is a side view of a heat dissipation device according to some embodiments of this application.

[0027] Figure 12 This is a front view of a heat dissipation device according to some other embodiments of this application.

[0028] Figure 13 This is a front view of a heat dissipation device according to some other embodiments of this application.

[0029] In the diagram: 1. Fan; 10. Frame component; 11. Outer frame; 111. First frame section; 112. Second frame section; 113. Spokes; 114. Edge band; 12. Support section; 20. Fan blade component; 21. Inner frame; 22. Blade; 221. Side edge; 23. Mounting section; 231. Receiving groove; 232. Peripheral wall; 233. Bottom wall; 24. Shaft core; 30. Reinforcing member; 31. First reinforcing part; 32. Second reinforcing part; 3 3. Third reinforcing section; 331. First segment; 332. Second segment; 2. Heat dissipation device; 40. Housing; 41. Sealed cavity; 42. Heat dissipation cavity; 50. Heat dissipation component; 51. First radiator; 511. Substrate; 512. First fin; 52. Second radiator; 521. Box; 522. Second fin; 60. Semiconductor device; 70. Magnetic device; 301. Frame; 302. Fan blade; 303. Gap. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] like Figure 1 and Figure 2 As shown, a fan in the related technology has a gap 303 between the outer edge of the fan blade 302 and the inner wall of the frame 301. For electrical equipment installed in the external environment, when foreign objects such as sand or gravel fall into the gap 303, the entire impeller may be stuck by the foreign objects, which will prevent the fan from working properly and have an adverse effect on the heat dissipation effect of the heat dissipation device.

[0034] To solve or at least partially alleviate the problem of impellers being blocked by foreign objects such as sand and gravel, this application provides a heat dissipation device 2 to dissipate heat from the components in the inverter, such as... Figures 3-13 As shown, the fan 1 includes a frame 10 and fan blades 20. The frame 10 includes an outer frame 11 and a support portion 12 connected to the outer frame 11. The fan blades 20 include an inner frame 21, a plurality of blades 22, and a shaft core 24. The inner frame 21 has a cylindrical structure and is arranged opposite to the outer frame 11 along the axial direction of the fan 1. The plurality of blades 22 are connected to the inner circumferential surface of the inner frame 21 and extend from the inner circumferential surface of the inner frame 21 to the center of the fan blades 20. The shaft core 24 is rotatably connected to the support portion 12 so that the fan blades 20 can rotate relative to the frame 10.

[0035] In other words, the blade 22 is connected to the inner frame 21, and the blade 22 and the inner frame 21 rotate together, which helps to avoid gaps between the outer edge of the blade 22 and the inner frame 21, thereby reducing the risk of the blade 22 getting stuck, improving the operational reliability of the fan 1 in harsh environments, and thus improving the reliability of the heat dissipation device 2.

[0036] It is understandable that in related technologies, when a foreign object gets stuck in the gap 303 between the outer edge of the fan blade 302 and the inner wall of the frame 301, the magnitude and direction of the squeezing force exerted on the sand by the outer edge of the fan blade 302 and the inner wall of the frame 301 remain constant. Consequently, the fan blade 302, under the driving force of the motor, cannot overcome the resistance generated by the stuck sand or other foreign object, causing the impeller to fail to rotate, which may eventually lead to motor overload and damage. In this embodiment, even if a foreign object enters the axial installation gap between the outer frame 11 and the inner frame 21, the foreign object is very likely to be thrown out by the centrifugal force of the rotating inner frame 21, thereby effectively reducing the risk of the fan blade 20 getting stuck.

[0037] In some embodiments, such as Figure 5 As shown, the outer frame 11 includes an annular rim 114 extending axially toward the fan blade 20 along the fan 1. At least a portion of the rim 114 is radially opposed to the inner circumferential surface of the inner frame 21. It should be understood that the rim 114 creates a labyrinthine mounting gap between the outer frame 11 and the inner frame 21, further reducing the risk of foreign objects becoming lodged in the axial mounting gap between the outer frame 11 and the inner frame 21.

[0038] It is worth mentioning that, such as Figure 5 and Figure 6 As shown, one side of the blade 22 is positioned close to the outer frame 11 along the side edge 221, thus having an axial gap between it and the surrounding edge 114. Even if a foreign object enters the gap between the side edge 221 of the blade 22 and the surrounding edge 114, since the side edge 221 of the blade 22 is very narrow and the blade 22 rotates at high speed, the foreign object is very likely to be dislodged by the blade 22 and discharged from the fan 1 between two adjacent blades 22, thereby effectively reducing the risk of the fan blade 20 being stuck.

[0039] In some embodiments, such as Figure 5 As shown, the dimension of the inner frame 21 along the axial direction of the fan 1 is larger than the dimension of the blade 22 along the axial direction of the fan 1. That is, let the dimension of the inner frame 21 along the axial direction of the fan 1 be H, and the dimension of the blade 22 along the axial direction of the fan 1 be h, satisfying: H > h. Furthermore, along the axial direction of the fan 1, the two end faces of the inner frame 21 extend beyond the two end faces of the blade 22. This arrangement ensures that when foreign objects such as sand or gravel approach the fan 1, they can preferentially contact the inner frame 21 and be thrown away by the rotating inner frame 21, thereby reducing damage to the blade 22 from sand or gravel and extending the service life of the fan blade component 20.

[0040] In some embodiments, the fan 1 further includes a drive assembly, which includes a stator coil and a magnetic sleeve. The stator coil is disposed on the outer periphery of the support portion 12, and the magnetic sleeve is fixed to the fan blade 20. The magnetic sleeve and the stator coil are arranged opposite each other at a radial distance along the fan 1, so as to drive the fan blade 20 to rotate relative to the frame member 10.

[0041] In some embodiments, such as Figure 5 and Figure 6 As shown, the fan blade assembly 20 also includes a mounting portion 23, with an inner frame 21 surrounding the outer periphery of the mounting portion 23, and a plurality of blades 22 connecting the inner frame 21 and the mounting portion 23. Furthermore, the mounting portion 23 has a receiving groove 231 extending axially along the fan 1; the inner circumferential surface of the receiving groove 231 is suitable for mounting the magnetic sleeve of the drive assembly; the shaft core 24 is fixed to the mounting portion 23, and the support portion 12 of the frame member 10 extends into the receiving groove 231, allowing it to be rotatably inserted into the shaft core 24. It should be understood that the fact that both the shaft core 24 and the magnetic sleeve are fixed to the mounting portion 23 and housed in the receiving groove 231 improves the integration of the fan blade assembly 20, making its structure more compact. In addition, the mounting portion 23 provides protection for the shaft core 24, the magnetic sleeve, and the support portion 12.

[0042] In some embodiments, such as Figure 6As shown, the mounting portion 23 includes a peripheral wall 232 and a bottom wall 233. The peripheral wall 232 has a cylindrical structure, and the bottom wall 233 is connected to the end of the peripheral wall 232 to define a receiving groove 231 between the peripheral wall 232 and the bottom wall 233. The shaft core 24 is fixed to the bottom wall 233. That is, the shaft core 24 is connected to the bottom wall 233 and extends from the bottom wall 233 along the axial direction of the fan 1 toward the frame member 10, thereby being rotatably inserted into the support portion 12. The magnetic sleeve is fixed to the inner circumferential surface of the peripheral wall 232, thereby being able to be disposed opposite to the stator coil disposed on the outer circumferential side of the support portion 12. Through the cooperative action of the magnetic sleeve and the stator coil, the fan blade member 20 can be driven to rotate relative to the frame member 10. Furthermore, the fan 1 also includes a reinforcing member 30 embedded in the mounting portion 23. At least a portion of the reinforcing member 30 is located on the bottom wall 233 and is arranged around the shaft core 24. This helps to improve the structural strength of the portion of the bottom wall 233 located on the outer periphery of the shaft core 24, thereby reducing the risk of cracks or damage to the bottom wall 233.

[0043] In at least one embodiment, the inner frame 21, blades 22, and mounting portion 23 of the fan blade 20 are integrally molded plastic parts, while the shaft core 24 is made of metal to improve the structural strength and rigidity of the shaft core 24. It should be understood that when the metal shaft core 24 is inserted into the mounting hole on the bottom wall 233, it will compress the bottom wall 233, potentially causing cracks or damage. By providing a reinforcing member 30 on the bottom wall 233, and by having the reinforcing member 30 surround the shaft core 24, the structural strength of the portion of the bottom wall 233 located on the outer periphery of the shaft core 24 is improved. This helps prevent cracks and damage to the bottom wall 233, improves the structural reliability of the fan blade 20, and extends the service life of the fan blade 20.

[0044] It is worth mentioning that the reinforcing member 30 can be embedded in the interior of the bottom wall 233; the reinforcing member 30 can also be exposed on the surface of the bottom wall 233, for example, exposed on the surface of the mounting hole to directly contact the shaft core 24. This application does not impose specific limitations on this.

[0045] In some embodiments, such as Figure 7 and Figure 8 As shown, the reinforcing member 30 includes a first reinforcing part 31, a second reinforcing part 32, and a third reinforcing part 33. Specifically, the first reinforcing part 31 is cylindrical and disposed on the peripheral wall 232, which can improve the structural strength of the peripheral wall 232. It should be understood that during the high-speed rotation of the fan blade 20, the magnetic sleeve with a large mass will be deformed by centrifugal force and exert a force on the peripheral wall 232. Through the first reinforcing part 31, the overall structural strength of the peripheral wall 232 can be improved, thereby reducing the risk of radial deformation of the peripheral wall 232, making the air gap between the magnetic sleeve and the stator coil more uniform, the magnetic field strength more stable, and thus improving the dynamic stability of the fan 1.

[0046] The second reinforcing part 32 is in the form of a ring-shaped plate, such as Figure 7 As shown, the reinforcement 32 is located on the bottom wall 233, which improves the structural strength of the bottom wall 233. It should be understood that since the shaft core 24 is fixed to the bottom wall 233, if the bottom wall 233 is twisted or deformed due to insufficient rigidity, the shaft core 24 may become misaligned, causing the fan 1 to vibrate violently and generate noise during operation. In this embodiment, the second reinforcement 32 improves the overall bending rigidity of the bottom wall 233, which helps to keep the shaft core 24 rotating on a preset axis, thus enabling the fan 1 to operate smoothly and quietly.

[0047] The third reinforcing section 33 is cylindrical, such as Figure 7 As shown, the third reinforcing part 33 extends toward the frame member 10 and is connected to the inner edge of the second reinforcing part 32 to surround the shaft core 24, thereby improving the structural strength of the portion of the bottom wall 233 located on the outer periphery of the shaft core 24 and reducing the risk of cracks or damage to the bottom wall 233.

[0048] In some embodiments, such as Figure 8 As shown, the third reinforcing part 33 includes a first segment 331 and a second segment 332; the first segment 331 is connected to the inner edge of the second reinforcing part 32 and extends toward the frame member 10; the second segment 332 is connected to the end of the first segment 331 away from the second reinforcing part 32, and the second segment 332 extends rotatably away from the frame member 10 from the first segment 331, wherein the first segment 331 is located on the outer periphery of the second segment 332, and the second segment 332 is arranged around the shaft core 24. That is to say, the first segment 331 and the second segment 332 are arranged opposite each other in the radial direction of the fan 1. It should be understood that the zigzag arrangement of the first segment 331 and the second segment 332 is beneficial to improving the connection strength between the third reinforcing part 33 and the bottom wall 233. Furthermore, the third reinforcing part 33 also has a certain degree of elasticity, thereby absorbing and attenuating some of the vibration energy generated by the rotation of the shaft core 24, improving the fatigue life of the mounting part 23, which helps to make the rotation of the fan blade part 20 more stable, the noise less, and extend the service life of the fan blade part 20.

[0049] In some embodiments, such as Figure 5 and Figure 9As shown, the outer frame 11 also includes a first frame portion 111, a second frame portion 112, and a plurality of spokes 113. Specifically, the first frame portion 111 is located on the outer periphery of the second frame portion 112, and the plurality of spokes 113 connect the first frame portion 111 and the second frame portion 112, thereby creating a large air intake channel between the first frame portion 111 and the second frame portion 112. The first frame portion 111 and the inner frame 21 of the fan blade 20 are arranged opposite each other along the axial direction of the fan 1. The surrounding edge 114 is connected to the first frame portion 111 and extends from the first frame portion 111 toward the inner frame 21, so that it is arranged opposite to the inner frame 21 along the radial direction of the fan 1. Thus, through the cooperation of the first frame portion 111, the surrounding edge 114, and the inner frame 21, a labyrinthine mounting gap is formed. The second frame portion 112 and the mounting portion 23 are arranged opposite each other along the axial direction of the fan 1, thereby shielding the receiving groove 231. Furthermore, the second frame portion 112 is connected to the support portion 12 and supports the mounting stator coil.

[0050] In at least one embodiment, the outer frame 11 is implemented as a one-piece molded plastic part, and the support part 12 is implemented as a metal part, such as a copper sleeve, to improve the structural strength and rigidity of the support part 12, thereby more reliably supporting the shaft core 24.

[0051] In at least one embodiment, the fan 1 further includes a bearing disposed between the shaft 24 and the support portion 12 to support the rotation of the shaft 24. It should be understood that the bearing helps to avoid wear on the shaft 24 and the support portion 12, thereby extending the service life of the fan 1.

[0052] In some embodiments, such as Figures 10-13 As shown, the heat dissipation device 2 also includes a housing 40 and several heat dissipation components 50. The heat dissipation components 50 are connected to the device to conduct heat from the device. The housing 40 has a sealed cavity 41 and a heat dissipation cavity 42, which are separated from each other. The sealed cavity 41 can accommodate the device, which helps to prevent dust, particles and other foreign objects brought in by the fan 1 from affecting the operation of the device. The heat dissipation cavity 42 can accommodate the heat dissipation components 50 and the fan 1. The fan 1 is located below or to the side of the heat dissipation component 50, which can make the airflow pass through the heat dissipation cavity 42 from bottom to top or pass through the heat dissipation cavity 42 laterally, thereby cooling the heat dissipation component 50.

[0053] In some embodiments, such as Figure 11 and Figure 13As shown, the heat sink 50 includes a first heat sink 51, which includes a substrate 511 and a plurality of first fins 512 connected to the substrate 511. Specifically, the substrate 511 is attached to the semiconductor device 60 to conduct heat from the semiconductor device 60, thereby cooling the semiconductor device 60. Furthermore, the first fins 512 increase the heat dissipation area of ​​the first heat sink 51, thereby improving the heat dissipation efficiency of the first heat sink 51. It should be understood that at least a portion of the substrate 511 extends into the sealed cavity 41, allowing it to be attached to the semiconductor device 60 in the sealed cavity 41; and the sealed connection between the substrate 511 and the housing 40 helps to ensure the sealing performance of the sealed cavity 41.

[0054] In at least one instance, such as Figures 10-13 As shown, at least one fan 1 is located below or to the side of the first heat sink 51, and the axis of the fan 1 is consistent with the extension direction of the first fin 512, so that the airflow blown out from the fan 1 can quickly pass through the gap between two adjacent first fins 512, thereby improving the heat dissipation efficiency.

[0055] In some embodiments, such as Figure 11 and Figure 13 As shown, the heat sink 50 also includes a second heat sink 52, which includes a housing 521 and a plurality of second fins 522 connected to the housing 521. Specifically, the housing 521 accommodates the magnetic device 70, and the heat from the magnetic device 70 can be conducted to the second fins 522 through the housing 521, thereby cooling the magnetic device 70. Furthermore, the second fins 522 can increase the heat dissipation area of ​​the second heat sink 52, thereby improving the heat dissipation efficiency of the second heat sink 52. It should be understood that at least a portion of the housing 521 is located within the sealed cavity 41 to accommodate the magnetic device 70, and the housing 521 is sealed to the housing 40, which helps to ensure the sealing performance of the sealed cavity 41.

[0056] In one instance, at least one fan 1 is located below or to the side of the second heat sink 52, and the axis of the fan 1 is aligned with the extension direction of the second fins 522, so that the airflow blown out from the fan 1 can quickly pass through the gap between two adjacent second fins 522, thereby improving the heat dissipation efficiency.

[0057] In at least one instance, such as Figure 11 and Figure 12 As shown, the extension direction of the first fins 512 of each first radiator 51 in the heat dissipation device 2 and the extension direction of the second fins 522 of each second radiator 52 are the same. This is conducive to the unidirectional and rapid flow of air blown out by the fan 1, reducing turbulence and improving heat dissipation efficiency.

[0058] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation device for dissipating heat from components in an inverter, characterized in that, Includes: a fan, the fan comprising, A frame component, the frame component including an outer frame and a support portion connected to the outer frame; A fan blade assembly includes an inner frame, a plurality of blades, and a shaft core. The inner frame has a cylindrical structure and is disposed opposite to the outer frame along the axial direction of the fan. The plurality of blades are connected to the inner circumferential surface of the inner frame and extend from the inner circumferential surface of the inner frame to the center of the fan blade assembly. The shaft core is rotatably connected to the support portion so that the fan blade assembly can rotate relative to the frame assembly.

2. The heat dissipation device according to claim 1, characterized in that, The outer frame includes an annular rim that extends axially toward the fan blades, and at least a portion of the rim is disposed radially opposite the inner circumferential surface of the inner frame to the fan blades.

3. The heat dissipation device according to claim 2, characterized in that, The inner frame has a dimension along the axial direction of the fan that is larger than the blades have a dimension along the axial direction of the fan.

4. The heat dissipation device according to any one of claims 2-3, characterized in that, The fan blade also includes a mounting portion, the inner frame surrounds the outer periphery of the mounting portion, and a plurality of blades connect the inner frame and the mounting portion; The mounting portion has a receiving groove that extends along the axial direction of the fan; the inner circumferential surface of the receiving groove is adapted to mount the magnetic sleeve of the drive assembly; the shaft core is fixed to the mounting portion, and the support portion of the frame member extends into the receiving groove so as to be rotatably inserted into the shaft core.

5. The heat dissipation device according to claim 4, characterized in that, The mounting portion includes a peripheral wall and a bottom wall. The peripheral wall has a cylindrical structure, and the bottom wall is connected to the end of the peripheral wall to define the receiving groove between the peripheral wall and the bottom wall. The shaft core is fixed to the bottom wall. The fan also includes a reinforcing member embedded in the mounting portion, at least a portion of which is located on the bottom wall and is disposed around the shaft core.

6. The heat dissipation device according to claim 5, characterized in that, The reinforcing member includes a first reinforcing part, a second reinforcing part, and a third reinforcing part; the first reinforcing part is cylindrical and disposed on the peripheral wall; the second reinforcing part is annular and disposed on the bottom wall; the third reinforcing part is cylindrical and connected to the inner edge of the second reinforcing part, and the third reinforcing part extends toward the frame member to surround the shaft core.

7. The heat dissipation device according to claim 6, characterized in that, The third reinforcing part includes a first segment and a second segment; the first segment is connected to the inner edge of the second reinforcing part and extends toward the frame member; The second segment is connected to the end of the first segment away from the second reinforcement, and the second segment extends rotatably away from the frame member from the first segment, wherein the first segment is located on the outer periphery of the second segment, and the second segment is arranged around the shaft core.

8. The heat dissipation device according to claim 4, characterized in that, The outer frame further includes a first frame portion, a second frame portion, and a plurality of spokes. The first frame portion is located on the outer periphery of the second frame portion. The plurality of spokes connect the first frame portion and the second frame portion. The first frame portion and the inner frame of the fan blade are arranged opposite to each other along the axial direction of the fan. The surrounding edge is connected to the first frame portion and extends from the first frame portion toward the inner frame, so as to be arranged opposite to the inner frame along the radial direction of the fan. The second frame portion and the mounting portion of the fan blade are arranged opposite to each other along the axial direction of the fan, so as to cover the receiving groove. The second frame portion can be connected to the support portion.

9. The heat dissipation device according to any one of claims 1-3, characterized in that, The fan also includes a bearing disposed between the shaft and the support portion to support the rotation of the shaft.

10. The heat dissipation device according to any one of claims 1-3, characterized in that, The heat dissipation device further includes a housing and several heat dissipation components, which are connected to the device. The housing has a sealing cavity and a heat dissipation cavity, which are separated from each other. The sealing cavity can accommodate the device, and the heat dissipation cavity can accommodate the heat dissipation components and the fan. The fan is located below or to the side of the heat dissipation components.

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