Fan blade assembly and axial flow fan

Abstract

The invention relates to the technical field of axial flow fans, and discloses a fan blade assembly and an axial flow fan, the fan blade assembly comprises a rotation driving part and an impeller, and the rotation driving part is provided with a power output end; the impeller comprises an impeller body and blades, a mounting hole is formed in the impeller body, and at least part of the power output end of the rotary driving part penetrates through the mounting hole and is connected to the impeller body; the blades are connected to the peripheral wall of the wheel body; and a heat insulation space is formed between the inner peripheral wall of the mounting hole and the outer peripheral wall of the power output end, so that the service life of the impeller can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of axial flow fan technology, specifically to a fan blade assembly and an axial flow fan. Background Technology

[0002] A fan blade structure typically includes a drive component and an impeller. The drive component rotates the impeller to produce airflow. During operation, the heat generated by the fan blade structure is transferred to the impeller, which is prone to high-temperature deformation, thus affecting its lifespan. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a fan blade assembly that can extend the service life of the impeller.

[0004] The present invention also proposes an axial flow fan having the above-described fan blade assembly.

[0005] According to a first aspect of the present invention, a fan blade assembly includes a rotary drive member and an impeller. The rotary drive member has a power output end. The impeller includes a wheel body and blades. The wheel body is provided with a mounting hole. The power output end of the rotary drive member passes through at least part of the mounting hole and is connected to the wheel body. The blades are connected to the outer peripheral wall of the wheel body. A heat insulation space is formed between the inner peripheral wall of the mounting hole and the outer peripheral wall of the power output end.

[0006] The fan blade assembly and axial flow fan according to embodiments of the present invention have at least the following beneficial effects: The impeller includes a wheel body and blades. The wheel body is provided with a mounting hole. The power output end of the rotary drive is at least partially inserted into the mounting hole and connected to the wheel body. The blades are connected to the outer peripheral wall of the wheel body, so that the rotary drive can drive the wheel body and blades to rotate to achieve air outlet. A heat insulation space is formed between the inner peripheral wall of the mounting hole and the outer peripheral wall of the power output end. This heat insulation space can separate the power output end and the wheel body, reducing the direct contact area for heat conduction between the power output end and the wheel body. This helps to reduce the transfer of heat to the wheel body, thereby improving the situation where the wheel body and blades deform due to excessive temperature, extending the service life of the impeller, and improving the situation where the outlet air temperature rises due to excessive impeller temperature.

[0007] According to some embodiments of the present invention, the inner peripheral wall of the mounting hole and the outer peripheral wall of the power output end are spaced apart to form an annular heat insulation space.

[0008] According to some embodiments of the present invention, the rotary drive includes a first mounting portion connected to the outer peripheral wall of the power output end; the impeller also includes a second mounting portion located within the heat insulation space and connected to the inner peripheral wall of the mounting hole; the second mounting portion and the outer peripheral wall of the power output end are spaced apart; the first mounting portion is connected to the second mounting portion.

[0009] According to some embodiments of the present invention, the first mounting part is provided with a first connecting hole; the second mounting part includes a body and a heat sink, the body is connected to the inner peripheral wall of the mounting hole and is provided with a second connecting hole; the heat sink is connected to the second connecting hole and is provided with a third connecting hole; the first connecting hole and the third connecting hole are opposite to each other; the fan blade assembly further includes a locking member, which passes through the first connecting hole and the second connecting hole.

[0010] According to some embodiments of the present invention, the mounting hole extends through the wheel body along the axial direction of the power output end.

[0011] According to some embodiments of the present invention, the blade includes a first edge and a second edge spaced apart and opposite to each other, the first edge being connected to the outer peripheral wall of the wheel body; the blade has a windward side and a leeward side spaced apart and opposite to each other along the thickness direction, the blade is provided with a wind-collecting groove, the opening of the wind-collecting groove being located on the windward side; the wind-collecting groove is located at one end of the blade near the first edge.

[0012] According to some embodiments of the present invention, the blade has at least one reinforcing portion protruding from its surface along the thickness direction at one end near the second edge, the reinforcing portion extending along the rotation direction of the blade, and the protrusion height of the reinforcing portion gradually increasing from the middle to both ends; and / or, the first edge extends in an arc.

[0013] According to some embodiments of the present invention, there are multiple blades, and the multiple blade bodies are distributed circumferentially in sequence; the blades also include a third edge and a fourth edge that are spaced apart and opposite to each other, the third edge being located on one side of the fourth edge in the direction of rotation of the blade; the fourth edge is provided with multiple notches, and the notches are distributed circumferentially in sequence along the extension direction of the fourth edge.

[0014] According to some embodiments of the present invention, the rotary drive includes a stator, the power output end includes a rotor, the rotor is rotatably sleeved outside the stator; the rotor is at least partially inserted into a mounting hole and connected to a wheel body, and a heat insulation space is formed between the inner peripheral wall of the mounting hole and the outer peripheral wall of the rotor.

[0015] An axial flow fan according to a first aspect of the present invention includes the fan blade assembly of any of the above embodiments.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 A schematic diagram of the structure of an axial flow fan provided in an embodiment of the present invention is shown; Figure 2 A cross-sectional structural schematic diagram of an axial flow fan provided in an embodiment of the present invention is shown; Figure 3 It shows Figure 2 Enlarged structural diagram at point III; Figure 4 This diagram shows a partially exploded structural schematic of an axial flow fan provided in an embodiment of the present invention. Figure 5 A schematic diagram of the fan blade assembly provided in an embodiment of the present invention is shown; Figure 6 A schematic diagram of the impeller structure provided in an embodiment of the present invention is shown; Figure 7 A cross-sectional structural diagram of the fan blade assembly provided in an embodiment of the present invention is shown; Figure 8 It shows Figure 7 Enlarged structural diagram at point VIII.

[0018] Figure label: Axial flow fan 10; First mesh shell 100; Mesh shell body 110; Middle frame 120; First fixing part 121; Third hole 1211; Second mesh shell 200; Second fixing part 210; Fourth hole 211; Blocking part 220; Connector 300; First connecting part 310; First hole 311; Limiting groove 313; Second connecting part 320; Second hole 321; Installation space 330; Third connecting part 340; Fastener 400; Locking rod 410; Locking sleeve 420; Fan blade assembly 500; Rotary drive component 510; Power output end 511; Rotor 5110; First mounting part 5111; First connecting hole 5113; Stator 513; Impeller 520; Wheel body 521; Mounting hole 5210; Second mounting part 5220; Body 5221; Heat sink 5223; Third connecting hole 5227; Blade 523; First edge 5231; Second edge 5233; Air collection slot 5235; Reinforcing part 5237; Third edge 5239; Fourth edge 5241; Notch 5243; Heat insulation space 530; Locking component 540; The accommodating cavity is 600. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Please see Figure 1 This application provides an axial flow fan 10, which can be a fan, an exhaust fan, or other axial flow fan 10. The fan can be a floor fan, a table fan, a portable small fan, or other types of fans.

[0025] Please see Figures 2 to 4 The axial flow fan 10 includes a first mesh shell 100, a second mesh shell 200, a connector 300, a fan blade assembly 500, and fasteners 400.

[0026] The first mesh shell 100 and the second mesh shell 200 are arranged opposite to each other, and a receiving cavity 600 is formed between the first mesh shell 100 and the second mesh shell 200. Both the first mesh shell 100 and the second mesh shell 200 may be provided with a number of holes to allow airflow.

[0027] The fan blade assembly 500 includes a rotary drive 510 and an impeller 520. The rotary drive 510 is connected to the second mesh shell 200 and has a power output end 511 located in the accommodating cavity 600. The impeller 520 is connected to the power output end 511, so that the rotary drive 510 can drive the blades 523 to rotate through the power output end 511 to achieve air output. The air output direction can be towards the first mesh shell 100.

[0028] As an example, the first mesh shell 100 and the second mesh shell 200 can be distributed relative to each other along the axial direction of the power output end 511.

[0029] The periphery of the first mesh shell 100 includes a first fixing part 121, and the periphery of the second mesh shell 200 includes a second fixing part 210. The first fixing part 121 and the second fixing part 210 can be connected and fixed by a connector 300.

[0030] The connector 300 includes a first connecting part 310 and a second connecting part 320 connected to each other, and an installation space 330 is formed between the first connecting part 310 and the second connecting part 320. The first fixing part 121 is disposed in the installation space 330. In this way, the installation space 330 can provide an accurate installation position for the first fixing part 121, which helps to improve assembly efficiency.

[0031] The second fixing part 210 is located on the side of the second connecting part 320 opposite to the first connecting part 310. Fasteners 400 are sequentially inserted through the second fixing part 210, the second connecting part 320, the first fixing part 121, and the first connecting part 310 to lock the first mesh shell 100, the connector 300, and the second mesh shell 200. Thus, the connector 300 is a separate structural component. It is only necessary to install the connector 300 in the installation space 330 of the first fixing part 121, and then lock the first mesh shell 100 and the second mesh shell 200 with the fasteners 400. There is no need to weld nuts on the first mesh shell 100 or the second mesh shell 200, making assembly more convenient, reducing the assembly difficulty of the axial flow fan 10, and improving production efficiency. In addition, the connector 300 is a separate structural component. The first mesh shell 100 and the second mesh shell 200 can be painted separately. After the painting process is completed, the first mesh shell 100, connector 300 and second mesh shell 200 are assembled. There is no need to consider the impact of paint on the connector 300, which further reduces the assembly difficulty of the axial flow fan 10 and further improves production efficiency.

[0032] Specifically, in related technologies, after welding the nuts to the mesh shell, considering factors such as the texture of the mesh shell's appearance and the impact of exposed weld marks on the appearance of the axial flow fan, a painting process is required. During the painting process, paint can easily enter the threads of the nut, causing the nut to fail and requiring re-tapping. However, this application uses a separate structural connector 300 to connect the first mesh shell 100 and the second mesh shell 200. Both the first mesh shell 100 and the second mesh shell 200 can be painted independently, without the connector 300 participating in the painting process. The first mesh shell 100, connector 300, and second mesh shell 200 are assembled after the painting process is completed, eliminating the need to consider the paint affecting the connector 300. This reduces the assembly difficulty of the axial flow fan 10 and improves production efficiency.

[0033] In some embodiments, the connector 300 is a plastic connector 300, which can buffer the vibration generated when the fan blade assembly 500 is working, reduce the rigid impact between the first mesh shell 100 and the connector 300, reduce the rigid impact between the second mesh shell 200 and the connector 300, reduce noise, improve the user experience, and reduce the manufacturing cost of the connector 300. In addition, the plastic part has good toughness. During the tightening process of the fastener 400, the first connecting part 310 and the second connecting part 320 can deform, so that the first connecting part 310 and the second connecting part 320 can better abut against the opposite sides of the first fixing part 121, reduce the shaking of the connector 300, and help the first mesh shell 100 and the second mesh shell 200 to be more firmly connected.

[0034] As an example, both the first mesh shell 100 and the second mesh shell 200 can be metal mesh shells to extend their service life. By placing the plastic connector 300 between the first mesh shell 100 and the second mesh shell 200, with the first mesh shell 100 and the connector 300 being in metal-plastic contact, and the second mesh shell 200 and the connector 300 also being in metal-plastic contact, rigid impact can be reduced, which helps to reduce noise.

[0035] Understandably, the first mesh shell 100 and the second mesh shell 200 can also be made of plastic mesh shells, which helps to reduce the manufacturing cost of the axial flow fan 10.

[0036] In some embodiments, the first connecting portion 310 is provided with a first hole 311, the second connecting portion 320 is provided with a second hole 321, the first fixing portion 121 is provided with a third hole 1211, and the second fixing portion 210 is provided with a fourth hole 211. The fourth hole 211, the second hole 321, the third hole 1211, and the first hole 311 are sequentially distributed and arranged opposite to each other. The fastener 400 is sequentially inserted through the fourth hole 211, the second hole 321, the third hole 1211, and the first hole 311 to lock the second fixing portion 210, the second connecting portion 320, the first fixing portion 121, and the first connecting portion 310. This makes installation convenient and can effectively lock the first mesh shell 100 and the second mesh shell 200. It also makes it easy to disassemble the fastener 400 to remove the first mesh shell 100, the second mesh shell 200, and the fastener 400, which is convenient for cleaning and maintenance.

[0037] As an example, the first hole 311 can be a threaded hole, and the fastener 400 can be inserted through the fourth hole 211 and then passed through the second hole 321 and the third hole 1211 in sequence, and then threadedly locked with the first hole 311. The end of the fastener 400 near the fourth hole 211 can be used to abut against the second fixing part 210, so that the second fixing part 210, the second connecting part 320, the first fixing part 121 and the first connecting part 310 can be locked by rotating the fastener 400.

[0038] As another example, the fourth hole 211 can be a threaded hole. The fastener 400 can be inserted through the first hole 311 and then passed through the third hole 1211 and the second hole 321 in sequence, and then threadedly locked with the fourth hole 211. The end of the fastener 400 near the first hole 311 can be used to abut against the second fixing part 210, so that the second fixing part 210, the second connecting part 320, the first fixing part 121 and the first connecting part 310 can be locked by rotating the fastener 400.

[0039] Fastener 400 can be screws, bolts, rivets or other fastening structures.

[0040] In some embodiments, the periphery of the second mesh shell 200 may surround the periphery of the first mesh shell 100. Then, along the radial direction of the fastener 400, the second fixing part 210, the second connecting part 320, the first fixing part 121 and the first connecting part 310 may be distributed sequentially from the outside of the accommodating cavity 600 to the inside of the accommodating cavity 600.

[0041] As an example, as described above, the first hole 311 can be a threaded hole, and the fastener 400 can be inserted through the fourth hole 211. The end of the fastener 400 near the fourth hole 211 can be used to abut against the side of the second fixing part 210 opposite to the second connecting part 320.

[0042] In some embodiments, fastener 400 may include locking lever 410 and locking sleeve 420.

[0043] The locking rod 410 may include a head and a rod portion connected together. The rod portion passes through the fourth hole 211, the second hole 321, the third hole 1211, and the first hole 311. The head contacts the second fixing part 210. The locking sleeve 420 is threadedly connected to the rod portion and contacts the first connecting part 310, thereby locking the second fixing part 210, the second connecting part 320, the first fixing part 121, and the first connecting part 310. The rod portion can be inserted into the fourth hole 211 from the outside of the second mesh shell 200 without structural interference, which helps to further improve production efficiency.

[0044] As an example, the diameter of the rod can be smaller than the diameter of the head, and the diameter of the head can be larger than the diameter of the fourth hole 211, thereby preventing the head from passing through the fourth hole 211. The head can be used to abut against the second fixing part 210, which helps the fastener 400 to lock the second fixing part 210, the second connecting part 320, the first fixing part 121 and the first connecting part 310.

[0045] The locking sleeve 420 can be a nut or other locking structure.

[0046] In some embodiments, a limiting groove 313 may be provided on the side of the first connecting portion 310 facing away from the second connecting portion 320.

[0047] The limiting groove 313 can connect to the first hole 311, and the rod can also pass through the limiting groove 313. The locking sleeve 420 can be sleeved on the rod and located in the limiting groove 313, so that the locking sleeve 420 can be hidden in the limiting groove 313. This helps to make the overall structure more compact and can prevent the locking sleeve 420 from being exposed and rotated by other structures. This also helps the fastener 400 to fix the first mesh shell 100, the connector 300 and the second mesh shell 200 more stably, reducing the possibility of loosening.

[0048] In some embodiments, a first anti-rotation structure may be provided between the locking sleeve 420 and the first connecting portion 310 to limit the rotation of the locking sleeve 420, which helps to further improve the situation where it is rotated by other structures, so that the fastener 400 can more stably fix the first mesh shell 100, the connecting member 300 and the second mesh shell 200, reducing the possibility of loosening.

[0049] There are several options for the first anti-rotation structure.

[0050] As an example, the first anti-rotation structure can be an adhesive component that can be bonded between the locking sleeve 420 and the first connecting portion 310, thereby fixing the locking sleeve 420 to the first connecting portion 310.

[0051] As another example, when the locking sleeve 420 is disposed within the limiting groove 313, the outer peripheral surface of the locking sleeve 420 may include a first surface, and the peripheral wall of the limiting groove 313 may include a second surface. The first and second surfaces may be in contact or spaced apart. The second surface abuts against the first surface to restrict the rotation of the locking sleeve 420. The first and second surfaces can be planar or curved. For example, the locking sleeve 420 may be a polygonal nut, and the shape of the limiting groove 313 may be adapted to the shape of the locking sleeve 420. Any surface of the outer peripheral surface of the polygonal nut can serve as the first surface.

[0052] In some embodiments, the connector 300 may further include a third connecting portion 340, and the periphery of the second mesh shell 200 may be provided with a blocking portion 220.

[0053] The first connecting part 310 and the second connecting part 320 are both connected to the third connecting part 340. An installation space 330 is formed between the first connecting part 310, the third connecting part 340 and the second connecting part 320. The blocking part 220 contacts the side of the third connecting part 340 that is away from the installation space 330. In this way, the blocking part 220 can press the connector 300 against the first fixing part 121, which helps to position the connector 300 and facilitates the subsequent installation of the fastener 400, further improving production efficiency and further reducing the shaking of the connector 300.

[0054] In some embodiments, the periphery of the first mesh shell 100 may include a plurality of first fixing portions 121 distributed circumferentially, and the periphery of the second mesh shell 200 may include a plurality of second fixing portions 210 distributed circumferentially. The number of connectors 300 and fasteners 400 is also plurality.

[0055] The first fixing parts 121 can be evenly distributed or periodically distributed.

[0056] The first fixing part 121 and the second fixing part 210 can correspond one to one and are connected by the connector 300 and the fastener 400, which helps to make the connection between the first mesh shell 100 and the second mesh shell 200 more stable.

[0057] The first fixing part 121 and the second fixing part 210 can be connected and fixed by a connector 300 and at least one fastener 400.

[0058] In some embodiments, the first mesh shell 100 may include a mesh shell body 110 and a middle frame 120.

[0059] The mesh shell body 110 and the second mesh shell 200 are respectively connected to the opposite sides of the middle frame 120, and a receiving cavity 600 is formed between the mesh shell body 110, the middle frame 120 and the second mesh shell 200. In this way, the middle frame 120 can better support the first mesh shell 100 and the second mesh shell 200, and can reduce the deformation of the first mesh shell 100 and the second mesh shell 200 under stress.

[0060] As an example, the mesh shell body 110 may have several holes to allow airflow. The middle frame 120 may be a metal middle frame 120, and the mesh shell body 110 may be a metal mesh shell body 110.

[0061] The periphery of the side of the middle frame 120 facing the second mesh shell 200 may include a first fixing part 121, a fastener 400 and a connector 300 for locking the middle frame 120 and the second mesh shell 200.

[0062] It should be noted that the mesh shell body 110 can be snapped, welded, glued, or connected to the middle frame 120 by a fastening structure, which can be bolts, screws, rivets, or other fastening structures. Alternatively, the mesh shell body 110 can also be connected to the middle frame 120 by a connector 300, as detailed in the above embodiments, which will not be repeated here.

[0063] Please see Figure 2 , Figure 5 and Figure 6 In some embodiments, the impeller 520 includes a wheel body 521 and blades 523.

[0064] The wheel body 521 is provided with a mounting hole 5210. The power output end 511 of the rotary drive 510 is at least partially inserted into the mounting hole 5210 and connected to the wheel body 521. The blade 523 is connected to the outer peripheral wall of the wheel body 521. Thus, the rotary drive 510 can drive the wheel body 521 and the blade 523 to rotate, so as to realize air outlet.

[0065] A heat insulation space 530 is formed between the inner peripheral wall of the mounting hole 5210 and the outer peripheral wall of the power output end 511. The heat insulation space 530 can separate the power output end 511 and the wheel body 521, reducing the area of ​​direct heat conduction between the power output end 511 and the wheel body 521. This helps to reduce the transfer of heat to the wheel body 521, thereby improving the deformation of the wheel body 521 and blades 523 due to excessive temperature, extending the service life of the impeller 520, and improving the situation where the outlet air temperature rises due to excessive impeller temperature.

[0066] As an example, the mounting hole 5210 may include a first orifice, which may be located on the end face of the wheel body 521 along the axial direction of the power output end 511. The power output end 511 may pass through the mounting hole 5210 via the first orifice.

[0067] In some embodiments, the inner peripheral wall of the mounting hole 5210 and the outer peripheral wall of the power output end 511 are spaced apart to form an annular heat insulation space 530, thereby increasing the size of the heat insulation space 530 and preventing the inner peripheral wall of the mounting hole 5210 and the power output end 511 from contacting each other for heat conduction, thus further improving the heat transfer to the impeller 520.

[0068] In some embodiments, the rotary drive 510 may include a first mounting portion 5111, and the impeller 520 may also include a second mounting portion 5220.

[0069] The first mounting part 5111 is connected to the outer peripheral wall of the power output end 511, and the second mounting part 5220 is connected to the inner peripheral wall of the mounting hole 5210. The first mounting part 5111 is connected to the second mounting part 5220, so that the power output end 511 and the impeller 520 can be connected and fixed through the first mounting part 5111 and the second mounting part 5220. The power output end 511 and the impeller 520 are only in contact through the first mounting part 5111 and the second mounting part 5220, thereby reducing the heat conduction area and reducing the amount of heat transferred to the impeller 520.

[0070] In some embodiments, the first mounting portion 5111 may be located outside the heat-insulating space 530, which helps the first mounting portion 5111 to exchange heat with the outside air.

[0071] In some embodiments, the second mounting portion 5220 is located within the heat insulation space 530, which helps to prevent the second mounting portion 5220 from being located on the outer periphery of the impeller 520 and affecting the position of the blade 523 and wind resistance.

[0072] In some embodiments, the second mounting portion 5220 may be spaced apart from the outer peripheral wall of the power output end 511, which helps to avoid the situation where the second mounting portion 5220 directly contacts the outer peripheral wall of the power output end 511, thereby increasing the heat conduction area and reducing the amount of heat transferred to the impeller 520.

[0073] Please see Figures 6 to 8 In some embodiments, the second mounting portion 5220 may include a body 5221 and a heat sink 5223, and the fan blade assembly 500 may also include a locking member 540.

[0074] The body 5221 can be connected to the inner peripheral wall of the mounting hole 5210. For example, the body 5221 can be integrally formed with the wheel body 521.

[0075] The first mounting part 5111 may be provided with a first connecting hole 5113, the body 5221 may be provided with a second connecting hole, and the heat sink 5223 may be connected to the second connecting hole to fix the heat sink 5223 and the body 5221.

[0076] As an example, the heat sink 5223 and the body 5221 can be integrally molded, and the heat sink 5223 can be fixed to the third connecting hole 5227 by overmolding.

[0077] As another example, the heat sink 5223 can be a heat sink sleeve. The outer peripheral wall of the heat sink 5223 can be provided with external threads, and the inner peripheral wall of the third connecting hole 5227 can be provided with matching internal threads. The heat sink 5223 can be threadedly connected to the third connecting hole 5227.

[0078] The heat sink 5223 may be provided with a third connecting hole 5227. The first connecting hole 5113 and the third connecting hole 5227 are opposite to each other. The locking member 540 passes through the second connecting hole to lock the first mounting part 5111 and the heat sink 5223. Some of the heat from the first mounting part 5111 can be transferred to the heat sink 5223 through the locking member 540. The heat sink 5223 can dissipate the heat, which helps to avoid local overheating at the contact point between the first mounting part 5111 and the second mounting part 5220.

[0079] As an example, the first connecting hole 5113 can be a threaded hole, and the locking member 540 can be inserted through the third connecting hole 5227 and threadedly connected to the first connecting hole 5113, thereby fixing the first mounting part 5111 and the heat sink 5223.

[0080] As another example, the third connecting hole 5227 can be a threaded hole, and the locking member 540 can be inserted through the first connecting hole 5113 and threadedly connected to the third connecting hole 5227, thereby fixing the first mounting part 5111 and the heat sink 5223.

[0081] The locking element 540 can be a screw, bolt, rivet or other fastening structure. For example, the structure of the locking element 540 can be the same as the structure of the fastener 400 in the above embodiment, or the structure of the locking element 540 can be the same as the structure of the locking rod 410 in the above embodiment, which will not be described in detail here.

[0082] In some embodiments, the heat sink 5223 can contact the first mounting portion 5111, so that the heat from the first mounting portion 5111 can be directly transferred to the heat sink 5223, further improving the situation of local overheating at the contact point between the first mounting portion 5111 and the second mounting portion 5220.

[0083] As an example, both the body 5221 and the heat sink 5223 can be in the form of a columnar structure extending axially along the power output end 511, and one end of the heat sink 5223 along the axial direction can contact the first mounting part 5111.

[0084] It should be noted that the main body 5221 can be in contact with the first mounting portion 5111, or it can be spaced apart from the first mounting portion 5111. When the main body 5221 and the first mounting portion 5111 are spaced apart, it helps to separate the first mounting portion 5111 and the main body 5221, reducing the possibility of the main body 5221 overheating due to the direct transfer of heat from the first mounting portion 5111 to the main body 5221, and further improving the heat transfer to the blade 523.

[0085] In some embodiments, the heat sink 5223 can be a metal heat sink, which helps to better transfer and diffuse heat, further improving the situation of local overheating at the contact point of the first mounting part 5111 and the second mounting part 5220.

[0086] As an example, the heat sink 5223 can be made of copper, stainless steel, aluminum or other metal.

[0087] In some embodiments, there can be multiple first mounting portions 5111 and multiple second mounting portions 5220. Multiple first mounting portions 5111 can be connected to the outer peripheral wall of the power output end 511 and are distributed at intervals along the circumference. Multiple second mounting portions 5220 can be connected to the inner peripheral wall of the mounting hole 5210 and are distributed at intervals along the circumference. Each first mounting portion 5111 can correspond to one second mounting portion 5220, which helps to more stably fix the impeller 520 to the power output end 511.

[0088] In some embodiments, the mounting hole 5210 can penetrate the wheel body 521 axially, thereby forming two opposing openings at both ends of the wheel body 521. The heat insulation space 530 can communicate with the external space through the two openings, which helps to better diffuse the heat in the heat insulation space 530 to the external environment and reduces the accumulation and temperature rise of heat in the heat insulation space 530. In addition, when the impeller 520 rotates, it can also drive the airflow in the heat insulation space 530 to conduct the heat out of the heat insulation space 530, further reducing the accumulation and temperature rise of heat in the heat insulation space 530.

[0089] As an example, the mounting hole 5210 may further include a second orifice. The first and second orifices may be respectively located on the end faces of the wheel body 521 at both ends along the axial direction of the power output end 511. Along the axial direction of the power output end 511, the first orifice may be positioned opposite to the first mesh shell 100, and the second orifice may be positioned opposite to the second mesh shell 200. The power output end 511 may pass through the mounting hole 5210, and also through the first and second orifices.

[0090] Please see Figure 2 , Figure 5 and Figure 6In some embodiments, the blade 523 may include a first edge 5231 and a second edge 5233 spaced apart, and the blade 523 has a windward side and a leeward side spaced apart along the thickness direction.

[0091] The first edge 5231 can be connected to the outer peripheral wall of the wheel body 521, and the second edge 5233 is the edge of the blade 523 along the radial direction away from the wheel body 521 at the power output end 511.

[0092] The blade 523 is provided with an air collecting groove. The opening of the air collecting groove is located on the windward side. The air collecting groove is located at one end of the blade 523 near the first edge 5231. The air collecting groove 5235 can collect airflow. When the blade 523 rotates, it can fan out the collected airflow, thereby increasing the air volume.

[0093] As an example, along the axial direction of the power output end 511, the windward side can face the second mesh shell 200, and the leeward side can face the first mesh shell 100. The slot of the wind converging groove 5235 can be located on the windward side.

[0094] The shape of the air concentrator 5235 can be flexibly set according to requirements. For example, the air concentrator 5235 can be a circular air concentrator, an elliptical air concentrator, or other shapes. The edge of the air concentrator 5235 and the surface of the blade 523 can be rounded to help avoid stress concentration that could cause the blade 523 to break, and also to help the airflow be smoother.

[0095] In some embodiments, the blade 523 may further include a third edge 5239 and a fourth edge 5241 spaced apart from each other.

[0096] Among them, the third edge 5239 is located on the side of the fourth edge 5241 in the rotation direction of the blade 523, and the blade 523 can achieve air outlet by rotating in the rotation direction.

[0097] In some embodiments, the first edge 5231 and the second edge 5233 are both connected between the third edge 5239 and the fourth edge 5241. The first edge 5231, the third edge 5239, the second edge 5233 and the fourth edge 5241 can be connected end to end in sequence.

[0098] In some embodiments, the first edge 5231 includes a first end and a second end spaced apart in the extending direction, the first end being connected to a third edge 5239 and the second end being connected to a fourth edge 5241. Understandably, both the first end and the second end are connected to the outer peripheral wall of the wheel body 521.

[0099] Along the axial direction of the power output end 511, the second end is closer to the second mesh shell 200 than the first end, so that the blades 523 can be tilted to better fan the airflow and increase the air volume.

[0100] In some embodiments, at least one reinforcing portion 5237 is provided on the surface of the blade 523 along the thickness direction.

[0101] The reinforcing part 5237 is located at the end of the blade 523 near the second edge 5233, which helps to improve the structural strength of the end of the blade 523 away from the wheel body 521.

[0102] As an example, the reinforcement 5237 can be located on the leeward side, which helps to reduce wind resistance.

[0103] At least one reinforcing part 5237 may be one reinforcing part 5237, two reinforcing parts 5237, three reinforcing parts 5237, or other numbers of reinforcing parts 5237. When there are two or more reinforcing parts 5237, each reinforcing part 5237 may be distributed sequentially at intervals along the second edge 5233 toward the first edge 5231.

[0104] The reinforcing part 5237 can extend along the distribution direction of the third edge 5239 and the fourth edge 5241. In this way, the reinforcing part 5237 can extend approximately along the rotation direction of the blade 523, which helps to reduce the possibility of the blade 523 breaking during rotation.

[0105] In some embodiments, the two ends of the reinforcing portion 5237 may be connected to the third edge 5239 and the fourth edge 5241 respectively; or, the two ends of the reinforcing portion 5237 may be spaced apart from the third edge 5239 and the fourth edge 5241 respectively; or, one end of the reinforcing portion 5237 may be connected to the third edge 5239 and the other end may be spaced apart from the fourth edge 5241; or, one end of the reinforcing portion 5237 may be connected to the fourth edge 5241 and the other end may be spaced apart from the third edge 5239.

[0106] In some embodiments, the height of the reinforcing part 5237 can gradually increase from the middle to both ends. The blade 523 is subjected to greater force on the side near the third edge 5239 and the side near the fourth edge 5241. By increasing the height of the reinforcing part 5237, the structural strength of the blade 523 on the side near the third edge 5239 and the side near the fourth edge 5241 can be improved, further reducing the possibility of blade 523 breakage.

[0107] In some embodiments, a reinforcing part 5237 may be connected to the second edge 5233, which helps to further enhance the structural strength of the end of the blade 523 away from the wheel body 521.

[0108] In some embodiments, the first edge 5231 may extend in an arc, which helps to improve the connection strength between the first edge 5231 and the wheel body 521 and reduces the possibility of cracking at the connection position between the blade 523 and the wheel body 521.

[0109] An arc can be a circular arc, an elliptical arc, or an arc of other shapes, or a combination of one or more of these.

[0110] In some embodiments, the recessed direction of the first edge 5231 can be approximately the same as the recessed direction of the wind converging groove 5235, that is, the first edge 5231 can be recessed from the windward side to the leeward side.

[0111] In some embodiments, the number of blades 523 can be multiple, and multiple blades 523 can be connected to the outer peripheral wall of the wheel body 521 and distributed sequentially along the circumference of the wheel body 521, which helps to increase the air volume. Multiple can refer to two or more.

[0112] In some embodiments, the fourth edge 5241 is provided with a plurality of notches 5243, and the notches 5243 are distributed sequentially at intervals along the extension direction of the fourth edge 5241, thereby reducing the wind resistance at the fourth edge 5241. The airflow can pass through the notches 5243 and enter the next blade 523, which helps the next blade 523 to fan more airflow and increase the air volume.

[0113] As an example, consider two adjacent blades 523, which can be referred to as the first blade and the second blade for ease of description. Airflow can pass through the notch 5243 of the first blade, allowing the windward side of the second blade to fan more airflow. Furthermore, the air-collecting slot 5235 of the second blade can more effectively store airflow, further increasing the output air volume.

[0114] In some embodiments, when there are multiple blades 523, the second mounting portion 5220 and the blades 523 can be staggered along the circumference of the wheel body 521, that is, the second mounting portion 5220 is approximately between two blades 523. This helps to avoid the second mounting portion 5220 and the blades 523 being radially opposite each other along the wheel body 521, further reducing the heat transfer of the second mounting portion 5220 to the blades 523, and further improving the high-temperature deformation of the blades 523.

[0115] It should be noted that the circumferential direction of the wheel body 521, the circumferential direction of the power output end 511, and the rotation direction of the impeller 520 are roughly in the same direction, and the axial direction of the wheel body 521, the axial direction of the mounting hole 5210, and the axial direction of the power output end 511 are roughly in the same direction.

[0116] Please see Figure 2 and Figure 7In some embodiments, the rotary drive 510 includes a stator 513 and the power output end 511 includes a rotor 5110.

[0117] The rotor 5110 is rotatably mounted on the outside of the stator 513, which helps to make the structure of the rotary drive component 510 more compact. The specific working principles of the stator 513 and the rotor 5110 can be referred to the existing technology, and will not be repeated here.

[0118] The rotor 5110 is at least partially inserted through the mounting hole 5210 (e.g., Figure 6 (As shown) and connected to the wheel body 521, a heat insulation space 530 is formed between the inner peripheral wall of the mounting hole 5210 and the outer peripheral wall of the rotor 5110 (as shown). Figure 5 (As shown).

[0119] Understandably, the first mounting part 5111 can be connected to the outer peripheral wall of the rotor 5110, for example, the first mounting part 5111 and the rotor 5110 can be integrally formed.

[0120] In the fan blade assembly 500 and axial flow fan 10 provided in this application embodiment, the impeller 520 includes a wheel body 521 and blades 523. The wheel body 521 is provided with a mounting hole 5210. The power output end 511 of the rotary drive member 510 is at least partially inserted into the mounting hole 5210 and connected to the wheel body 521. The blades 523 are connected to the outer peripheral wall of the wheel body 521. Thus, the rotary drive member 510 can drive the wheel body 521 and blades 523 to rotate, so as to realize air output. A heat insulation space 530 is formed between the inner peripheral wall of the mounting hole 5210 and the outer peripheral wall of the power output end 511. The heat insulation space 530 can separate the power output end 511 and the wheel body 521, reducing the area of ​​direct heat conduction between the power output end 511 and the wheel body 521. This helps to reduce the transfer of heat to the wheel body 521, thereby improving the deformation of the wheel body 521 and blades 523 due to excessive temperature, extending the service life of the impeller 520, and improving the situation where the outlet air temperature rises due to excessive impeller temperature.

[0121] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A fan blade assembly, characterized in that, include: A rotary drive component with a power output end; An impeller includes a wheel body and blades. The wheel body has a mounting hole. At least part of the power output end of the rotary drive component passes through the mounting hole and is connected to the wheel body. The blades are connected to the outer peripheral wall of the wheel body. A heat insulation space is formed between the inner peripheral wall of the mounting hole and the outer peripheral wall of the power output end.

2. The fan blade assembly according to claim 1, characterized in that, The inner peripheral wall of the mounting hole and the outer peripheral wall of the power output end form an annular heat insulation space.

3. The fan blade assembly according to claim 1, characterized in that, The rotary drive component includes a first mounting portion, which is connected to the outer peripheral wall of the power output end; The impeller further includes a second mounting portion, which is located within the heat insulation space and connected to the inner peripheral wall of the mounting hole; the second mounting portion and the outer peripheral wall of the power output end are spaced apart. The first mounting part is connected to the second mounting part.

4. The fan blade assembly according to claim 3, characterized in that, The first mounting part is provided with a first connecting hole; The second mounting part includes a body and a heat sink. The body is connected to the inner peripheral wall of the mounting hole and is provided with a second connecting hole. The heat sink is connected to the second connecting hole and is provided with a third connecting hole. The first connecting hole and the third connecting hole are opposite to each other; the fan blade assembly also includes a locking member, which passes through the first connecting hole and the second connecting hole.

5. The fan blade assembly according to claim 1, characterized in that, The mounting hole extends through the wheel body along the axial direction of the power output end.

6. The fan blade assembly according to claim 1, characterized in that, The blade includes a first edge and a second edge spaced apart from each other, the first edge being connected to the outer peripheral wall of the wheel body; The blade has a windward and leeward side spaced apart along its thickness direction. The blade is provided with a wind-gathering groove, the opening of which is located on the windward side. The wind-gathering groove is located at one end of the blade near the first edge.

7. The fan blade assembly according to claim 6, characterized in that, The blade has at least one reinforcing portion protruding from its surface along the thickness direction at one end near the second edge. The reinforcing portion extends along the rotation direction of the blade, and the protrusion height of the reinforcing portion gradually increases from the middle to both ends. And / or, the first edge extends in an arc.

8. The fan blade assembly according to claim 6, characterized in that, The number of blades is multiple, and the multiple blades are distributed circumferentially in sequence with the wheel body; The blade also includes a third edge and a fourth edge spaced apart from each other, the third edge being located on one side of the fourth edge in the direction of rotation of the blade; The fourth edge has multiple notches, and each notch is distributed at intervals along the extension direction of the fourth edge.

9. The fan blade assembly according to any one of claims 1 to 8, characterized in that, The rotary drive component includes a stator, and the power output end includes a rotor, which is rotatably sleeved on the stator. The rotor is at least partially inserted into the mounting hole and connected to the wheel body, and the heat insulation space is formed between the inner peripheral wall of the mounting hole and the outer peripheral wall of the rotor.

10. An axial flow fan, characterized in that, Includes the fan blade assembly according to any one of claims 1 to 9.

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