Fan assembly and outer rotor fan

Abstract

The utility model discloses a fan assembly and an outer rotor fan with the fan assembly, the fan assembly comprises a rotor device and an impeller device, the rotor device comprises a rotating shaft, an end plate, a magnet yoke and a plurality of permanent magnets; the impeller device is connected with the rotor device, and the impeller device comprises a structure which integrally forms the rotating shaft, the end plate, the magnet yoke and the permanent magnet. According to the fan assembly disclosed by the embodiment of the utility model, the rotor device and the impeller device are integrally formed, so that the fan assembly can be conveniently manufactured, and the assembly of the rotor device, the impeller device and the fan is favorably simplified. In addition, the integrated fan assembly is also beneficial to reducing the initial dynamic balance of the fan, so that the noise vibration of the fan is reduced, the service life of the product is prolonged, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan assembly and an outer rotor fan with the fan assembly. Background Art

[0002] In the related art, air handling units usually use external rotor centrifugal fans for air circulation. The permanent magnets in the rotor assembly are glued to the inner surface of the yoke with glue, and the impeller device is fixed to the yoke flange with screws. The assembly process is complicated, and after multiple assemblies, the initial dynamic balance of the fan assembly is large, resulting in large fan noise and vibration, and poor user experience. Utility Model Content

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a fan assembly comprising a rotor device and an impeller device in one body.

[0004] Another object of the present invention is to provide an external rotor fan, comprising the aforementioned fan assembly.

[0005] According to an embodiment of the present invention, a fan assembly includes: a rotor device and an impeller device, wherein the rotor device includes a rotating shaft, an end plate, a yoke and a plurality of permanent magnets; the impeller device is connected to the rotor device, and the impeller device includes a structure in which the rotating shaft, the end plate, the yoke and the permanent magnets are integrally formed.

[0006] The fan assembly according to the present invention integrates the rotor assembly and the impeller assembly, facilitating manufacture and simplifying assembly of the rotor assembly, the impeller assembly, and the fan. Furthermore, the integrated fan assembly reduces the fan's initial dynamic balance, thereby reducing noise and vibration, extending product life, and enhancing the user experience.

[0007] In addition, the fan assembly according to the above embodiment of the utility model may also have the following additional technical features:

[0008] In some examples of the present invention, the impeller device includes a main body portion arranged around the rotating shaft, and the main body portion is integrally formed.

[0009] In some examples of the present invention, the main body integrally forms the rotating shaft, the end plate, the yoke, and the permanent magnet.

[0010] In some examples of the present invention, the impeller device includes a first cover plate, the first cover plate is connected to the main body, and the first cover plate is integrally formed.

[0011] In some examples of the present invention, the fan assembly also includes a second cover plate and a plurality of blades, and the plurality of blades are arranged at intervals around the periphery of the main body; the opposite ends of the blades are respectively connected to the first cover plate and the second cover plate, and the first cover plate, the second cover plate and the plurality of blades are integrally formed.

[0012] In some examples of the present invention, a plurality of first reinforcing ribs and a plurality of second reinforcing ribs are provided on the first cover plate, one end of the first reinforcing rib is connected to the main body, and the other end is connected to the second reinforcing rib, and the second reinforcing rib is connected to the first cover plate.

[0013] In some examples of the present invention, a first flange is provided on a side of the first cover away from the main body, and the first flange extends in a direction away from the main body.

[0014] In some examples of the present invention, the second cover plate is opposite to the first cover plate along the extension direction of the rotating shaft, the second cover plate includes a plate portion, the multiple blades are connected to the plate portion, the plate portion is annular, the outer periphery of the plate portion is provided with a second flange, the second flange extends in a direction away from the first cover plate, the inner periphery of the plate portion is provided with a flow guide extending in the same direction as the second flange, and the inner diameter of the flow guide gradually decreases in the direction away from the plate portion.

[0015] In some examples of the present invention, the end plate is arranged on one side of the main body and connects the main body and the rotating shaft. The end plate includes a flat plate portion and a folded edge portion. The outer periphery of the flat plate portion is connected to the folded edge portion. A through hole is provided on the inner side of the flat plate portion. The rotating shaft is passed through the through hole. The folded edge portion is integrally formed on the peripheral wall of the main body and extends toward the permanent magnet.

[0016] In some examples of the present invention, the main body includes a sleeve, an inner wall of the sleeve is connected to the rotating shaft, and the sleeve is connected to the flat plate portion.

[0017] In some examples of the present invention, the flat plate portion is provided with a plurality of ribs, and the plurality of ribs are arranged at intervals.

[0018] In some examples of the present invention, a plurality of through holes are provided on the flat plate portion, and the plurality of through holes are arranged at intervals, and a portion of the main body portion passes through the through holes.

[0019] In some examples of the present invention, the protruding directions of the plurality of ribs are away from the peripheral wall of the main body.

[0020] In some examples of the present invention, the plurality of ribs are arranged divergently on the flat plate portion.

[0021] In some examples of the present invention, the plurality of through holes are arranged in a divergent manner on the flat plate portion.

[0022] In some examples of the present invention, the plurality of ribs and the plurality of through holes are arranged at intervals.

[0023] In some examples of the present invention, the permanent magnet and the magnetic yoke are provided on a peripheral wall of the main body, and an outer wall of the permanent magnet is in contact with an inner wall of the magnetic yoke.

[0024] In some examples of the present invention, the permanent magnet is arc-shaped, and the diameter of the inner peripheral wall of the main body is the same as the diameter of the inner wall of the permanent magnet.

[0025] In some examples of the present invention, the inner side of the permanent magnet is approximately flush with the inner circumferential wall of the main body.

[0026] In some examples of the present invention, the peripheral wall of the main body is configured to form a first accommodating cavity and several second accommodating cavities, the first accommodating cavity surrounds the peripheral wall, the several second accommodating cavities are arranged on the inner side of the peripheral wall at intervals along the circumferential direction, the several second accommodating cavities are all connected to the first accommodating cavity, the magnetic yoke is arranged in the first accommodating cavity, and the several permanent magnets are correspondingly arranged in the several second accommodating cavities.

[0027] In some examples of the present invention, the impeller device is injection molded, and the rotor device is integrally molded in the impeller device.

[0028] An outer rotor fan according to an embodiment of the present invention includes a stator assembly and the aforementioned fan assembly, wherein the fan assembly is connected to the stator assembly.

[0029] According to the outer rotor fan of the embodiment of the present invention, by applying the aforementioned fan assembly, the impeller device and the rotor device can be assembled on the fan at the same time, which is beneficial to simplifying the assembly process and improving the assembly efficiency of the outer rotor fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a fan assembly in some embodiments of the present invention;

[0031] Figure 2 Yes Figure 1 A partial enlarged view of the center circle A;

[0032] Figure 3 is a schematic structural diagram of a fan assembly in some embodiments of the present invention (the rotor device is not shown);

[0033] Figure 4 is an exploded view of a fan assembly in some embodiments of the present invention;

[0034] Figure 5 It is a schematic structural diagram of the end plate in some embodiments of the present invention.

[0035] Reference numerals:

[0036] 100. Fan assembly; 10. Rotor assembly; 11. Rotating shaft; 12. End plate; 121. Flat plate portion; 1211. Raised rib; 101. First through hole; 102. Second through hole; 122. Folded edge portion; 103. Through hole; 13. Yoke; 14. Permanent magnet; 20. Impeller assembly; 21. Main body portion; 211. Peripheral wall; 212. Bottom wall; Accommodating groove; 220; 22. Sleeve; 221. Support member; 201. First accommodating cavity; 202. Second accommodating cavity; 23. Blade; 24. First cover plate; 241. First flange; 251. First reinforcing rib; 252. Second reinforcing rib; 26. Second cover plate; 261. Plate portion; 262. Second flange; 263. Guide member. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] Combine Figures 1 to 5 According to an embodiment of the present invention, a fan assembly 100 includes: a rotor device 10 and an impeller device 20. The rotor device 10 includes a rotating shaft 11, an end plate 12, a yoke 13, and a plurality of permanent magnets 14. The impeller device 20 is connected to the rotor device 10, and the impeller device 20 includes a structure in which the end plate 12, the yoke 13, the plurality of permanent magnets 14, and the rotating shaft 11 are integrally formed, which can be convenient for manufacturing and assembly. Specifically, the rotor device 10 includes multiple components, and the components of the rotor device 10 can be integrally formed with the impeller device 20. As a result, the rotating shaft 11, the end plate 12, the yoke 13, and the plurality of permanent magnets 14 of the rotor device 10 do not need to be assembled and connected to the impeller device 20 separately, which can improve assembly efficiency. In addition, when the fan assembly 100 in which the rotor device 10 and the impeller device 20 are integrally formed is applied to a fan, it can be directly assembled with the stator assembly of the fan, which is conducive to improving the assembly efficiency of the fan.

[0039] According to the fan assembly 100 of the embodiment of the present invention, by integrating the components of the rotor device 10 and the impeller device 20, the fan assembly 100 can be easily manufactured and the assembly of the rotor device 10, the impeller device 20 and the fan can be simplified.

[0040] Combine Figure 1In some embodiments of the present invention, the impeller device 20 includes a main body 21 arranged around the rotating shaft 11 so that the impeller device 20 rotates with the rotating shaft 11, and the main body 21 is formed in one piece. The main body 21 integrally forms the end plate 12, the yoke 13, the plurality of permanent magnets 14, and the rotating shaft 11. Therefore, when manufacturing the main body 21, the aforementioned components can be directly assembled to the main body 21, thereby improving assembly efficiency and structural stability. In addition, the integrated fan assembly 100 is also conducive to reducing the initial dynamic balance of the fan, thereby reducing the noise and vibration of the fan, extending the service life of the product, and improving the user experience.

[0041] In some embodiments of the present invention, Figure 1 The impeller device 20 includes a first cover plate 24, which is connected to the main body 21. The first cover plate 24 can protect the impeller device 20 and its internal structure. The first cover plate 24 is integrally formed and can be easily manufactured.

[0042] Specifically, in some embodiments of the present invention, Figure 1 The first cover plate 24 is provided with a plurality of first reinforcing ribs 251 and a plurality of second reinforcing ribs 252. One end of the first reinforcing rib 251 is connected to the main body 21, and the other end is connected to the second reinforcing rib 252. The second reinforcing rib 252 is connected to the first cover plate 24. In other words, the first reinforcing rib 251 and the second reinforcing rib 252 can be used to connect the first cover plate 24 and the main body 21 and help improve the structural strength of the connection. Specifically, one end of the first reinforcing rib 251 is connected to the main body 21 and extends in a direction away from the main body 21. The plurality of first reinforcing ribs 251 are connected to the first cover plate 24 and the main body 21 in a divergent shape. The plurality of second reinforcing ribs 252 are connected in a ring shape and surround the first cover plate 24 and are connected to the plurality of first reinforcing ribs 251.

[0043] Optionally, combined Figure 3 A plurality of first reinforcing ribs 251 and a plurality of second reinforcing ribs 252 are provided on the first cover plate 24. The first reinforcing ribs 251 extend radially, with one end of the first reinforcing rib 251 connected to the main body 21 and the other end connected to the second reinforcing rib 252. The width of the first reinforcing rib 251 gradually narrows from the main body 21 to the second reinforcing rib 252.

[0044] Optionally, a convex strip is provided on the first cover plate 24 , and the convex strip extends into at least a portion of the first reinforcing rib 251 .

[0045] Combine Figure 1 and Figure 3In some embodiments of the present invention, a first flange 241 is provided on a side of the first cover plate 24 away from the main body 21. The first flange 241 extends in a direction away from the blades 23, which can improve the structural strength of the impeller device 20 and facilitate the assembly of the impeller device 20 with other components. During manufacturing, the main body 21, the multiple first reinforcing ribs 251 and the multiple second reinforcing ribs 252, the first cover plate 24, and the first flange 241 on the first cover plate 24 can be injection molded as a whole, thereby facilitating manufacturing. In combination with the above, when the impeller device 20 is injection molded, the rotor device 10 can cooperate with the main body 21, so that during the injection molding process, the rotor device 10 and the main body 21 are integrally molded. More specifically, the first flange 241, the first reinforcing rib 251, and the second reinforcing rib 252 can all be configured to extend or protrude along the axial direction of the rotating shaft 11, so that the mold can be separated along the axial direction when demolding after injection molding.

[0046] In some embodiments of the present invention, the impeller assembly 20 further includes a second cover plate 26 and a plurality of blades 23, which are spaced apart around the outer circumference of the main body 21. Opposite ends of the blades 23 are connected to the first cover plate 24 and the second cover plate 26, respectively. The first cover plate 24, the second cover plate 26, and the plurality of blades 23 are integrally formed, which facilitates the manufacture of the impeller assembly 20. For example, the first cover plate 24, the second cover plate 26, and the plurality of blades 23 are arranged axially. During manufacture, the mold can be demolded along the axial direction to create a one-piece structure.

[0047] The first cover plate 24 can connect the main body 21 and the blades 23 . When the rotor device 10 rotates, it can drive the impeller device 20 to rotate, thereby driving the blades 23 to rotate.

[0048] In some embodiments of the present invention, Figure 3 The second cover plate 26 is opposite to the first cover plate 24 along the extension direction of the rotating shaft 11. The second cover plate 26 includes a plate portion 261, and multiple blades 23 are connected to the plate portion 261. The second cover plate 26 can be connected to the end of the blade 23 away from the first cover plate 24, thereby improving the structural stability of the impeller device 20.

[0049] Plate portion 261 is annular and has a second flange 262 formed on its outer periphery. This flange 262 extends away from first cover plate 24, enhancing the structural strength of impeller assembly 20 and facilitating assembly of impeller assembly 20 with other components. Furthermore, the fact that second flange 262 extends away from blades 23 also facilitates demolding during manufacturing.

[0050] The inner periphery of plate portion 261 is provided with a flow guide 263 extending in the same direction as second flange 262. The inner diameter of flow guide 263 gradually decreases as it moves away from the plate portion, thereby increasing air intake and reducing flow resistance during fluid passage, thereby improving fluid flow efficiency. Specifically, flow guide 263 is constructed with an arc-shaped bell mouth, with the bell mouth opening facing away from end plate 12. This bell mouth shape improves fan efficiency, facilitates uniform airflow diffusion, and enhances fan efficiency, thereby improving fan performance.

[0051] Combine Figure 2 In some embodiments of the present invention, the end plate 12 is provided on one side of the main body 21 and connects the main body 21 and the rotating shaft 11. Specifically, since the main body 21 is provided around the rotating shaft 11 and the main body 21 and the rotating shaft 11 are spaced apart, the end plate 12 can connect the main body 21 and the rotating shaft 11. The end plate 12 can be supported between the main body 21 and the rotating shaft 11, thereby improving the structural stability between the main body 21 and the rotating shaft 11, thereby improving the structural stability of the impeller device 20 and the rotor device 10 after they are matched. In other words, the end plate 12 of the rotor device 10 can play a connecting and supporting role, thereby improving the stability of the rotor device 10 and the impeller device 20 after they are connected.

[0052] More specifically, the end plate 12 includes a flat portion 121 and a folded edge portion 122. The outer periphery of the flat portion 121 is connected to the folded edge portion 122. A through hole 103 is provided on the inner side of the flat portion 121. The rotating shaft 11 is passed through the through hole 103. The folded edge portion 122 is integrally formed with the peripheral wall 211 of the main body and extends toward the permanent magnet 14. The through hole 103 on the inner side of the flat portion 121 can cooperate with the rotating shaft 11, so that the end plate 12 can connect the main body 21 with the rotating shaft 11. The outer periphery of the flat portion 121 is provided with the folded edge portion 122, which is connected to the peripheral wall 211 of the main body. As a result, the flat portion 121 can be supported between the rotating shaft 11 and the peripheral wall 211 of the main body in the radial direction of the rotating shaft 11, thereby improving the stability of the connection. The folded edge portion 122 can further improve the stability of the connection between the end plate 12 and the main body portion 21, and the extension direction of the folded edge portion 122 is different from that of the flat plate portion 121. Thus, the flat plate portion 121 and this edge portion extend in two different directions respectively, thereby improving the supporting effect of the end plate 12 and improving the stability of the cooperation between the end plate 12 and the main body portion 21.

[0053] Combine Figure 2 The flat plate portion 121 may be a flat plate perpendicular to the axis of the rotor device 10 or the rotating shaft 11 , and the folded edge portion 122 is connected to the periphery of the flat plate portion 121 and extends toward the permanent magnet 14 .

[0054] Combine Figure 2 and Figure 3In some embodiments of the present invention, the main body 21 includes a sleeve 22, the inner wall of which is connected to the rotating shaft 11, and the sleeve 22 is connected to the flat plate portion 121. In other words, the sleeve 22 can be provided between the flat plate portion 121 and the rotating shaft 11, and the rotating shaft 11 is inserted into the sleeve 22. The sleeve 22 can protect the rotating shaft 11 and improve the matching accuracy between the rotating shaft 11 and the impeller device 20.

[0055] Further, combined with Figure 2 and Figure 3 The main body 21 further includes a bottom wall 212, which is connected to the peripheral wall 211 of the main body and the sleeve 22. The bottom wall 212 is formed with a receiving groove 220, which surrounds the sleeve 22, and the flat plate portion 121 is disposed within the receiving groove 220. The impeller device 20 further includes a support member 221, which is connected to the sleeve 22 and the bottom wall 212 of the main body. The support member 221 extends along the axial direction of the sleeve 22, and the width of the support member 221 gradually increases in the direction approaching the bottom wall 212. Specifically, the support member 221 can be configured as a right triangle, with its two right-angled sides respectively connected to the outer wall of the sleeve 22 and the bottom wall 212.

[0056] Combine Figure 2 and Figure 5 In some embodiments of the present invention, the flat plate portion 121 is provided with a plurality of ribs 1211 , which are arranged at intervals. The ribs 1211 can improve the structural stability of the flat plate portion 121 , thereby improving the stability of the connection between the main body portion 21 and the rotating shaft 11 .

[0057] Combine Figure 5 In some embodiments of the present invention, a plurality of through holes are provided on the flat plate portion 121, and the plurality of through holes are arranged at intervals, and a portion of the main body portion 21 passes through the through holes, which can further improve the tightness of the connection between the main body portion 21 and the end plate 12, and improve the structural strength after assembly. In combination with the above, the folded edge portion 122 of the end plate 12 can be connected to the peripheral wall 211 of the main body portion, and the flat plate portion 121 is connected to the main body portion 21, which can further improve the connection strength, so that the main body portion 21 can be connected to the end plate 12 in different directions. During actual assembly, the impeller device 20 and the rotor device 10 can be in the form of injection molding, and the plastic of the main body portion 21 can enter the through holes. After molding, the main body portion 21 can be directly fixedly connected to the flat plate portion 121. Thus, on the basis of realizing the integrated structure of the rotor device 10 and the impeller device 20, the tightness of the connection between the two can be improved.

[0058] Further, combined with Figure 2In some embodiments of the present invention, the protrusion direction of the multiple ribs 1211 can be away from the peripheral wall 211 of the main body, which can improve the side of the end plate 12 away from the main body 21, thereby improving the stability of the structure. Specifically, the flat plate portion 121 can have a first side and a second side. The first side can be the side facing the peripheral wall 211 of the main body, and the second side can be the side facing away from the peripheral wall 211 of the main body. On the first side of the flat plate portion 121, the main body 21 can provide support; and the multiple ribs 1211 protruding toward the second side can provide support on the second side of the flat plate portion 121, thereby improving the stability of the structure.

[0059] In some embodiments of the present invention, the plurality of ribs 1211 are arranged in a divergent pattern on the flat plate portion 121. In other words, the plurality of ribs 1211 may be arranged radially or diffusely along a specific pattern, thereby providing support in multiple directions on the flat plate portion 121, facilitating uniform pressure distribution and reducing local stress concentration.

[0060] Furthermore, in some embodiments of the present invention, multiple through holes are arranged divergently on the flat plate portion 121 and can be connected to the main body portion 21 in multiple directions, which is beneficial to improving the tightness of the connection between the flat plate portion 121 and the main body portion 21.

[0061] Specifically, in some embodiments of the present invention, the plurality of ribs 1211 and the plurality of through holes can be arranged at intervals, whereby the ribs 1211 can also improve the structural strength at the connection position between the flat plate portion 121 and the main body portion 21, thereby improving the stability after the connection. Figure 5 The plurality of ribs 1211 and the plurality of through holes are arranged in a divergent shape. Specifically, the plurality of through holes may include a first through hole 101 and a second through hole 102. The plurality of first through holes 101 are arranged in a straight line along the radial direction of the flat plate portion 121. The plurality of second through holes 102 are arranged in a straight line along the radial direction of the flat plate portion 121. The plurality of first through holes 101 and the plurality of second through holes 102 are spaced apart along the circumference of the flat plate portion 121. The ribs 1211 are provided at the intervals between the first through holes 101 and the second through holes 102. Since the plurality of first through holes 101 and the second through holes 102 are provided on the flat plate, the structural strength of the flat plate portion 121 may be weak at the through holes. Providing the ribs 1211 around the first through holes 101 and the second through holes 102 can improve the stability and balance of the flat plate portion 121.

[0062] The ribs 1211 may be trapezoidal in shape, with the width of the ribs 1211 gradually increasing towards the periphery of the flat plate portion 121. Since the plurality of first through holes 101 and the plurality of second through holes 102 divide the flat plate portion 121 into a plurality of fan-shaped structures, the plurality of ribs 1211 may also be fan-shaped.

[0063] Combine Figure 2 In some embodiments of the present invention, the outer wall of the permanent magnet 14 fits with the inner wall of the yoke 13, which can improve the coordination effect between the permanent magnet 14 and the yoke 13, so that the yoke 13 can form a closed magnetic circuit around the permanent magnet 14, and can also provide support for the permanent magnet 14. More specifically, the permanent magnet 14 and the yoke 13 are arranged on the peripheral wall 211 of the main body, thereby achieving the coordination between the permanent magnet 14 and the yoke 13 and the main body 21, which can improve the tightness of the connection. The permanent magnet 14 and the yoke 13 need to be arranged around the outer periphery of the rotating shaft 11, and the peripheral wall 211 of the main body is arranged around the outer periphery of the rotating shaft 11. The permanent magnet 14 and the yoke 13 are arranged on the peripheral wall 211 of the main body to achieve the functionality of the permanent magnet 14 and the yoke 13 and facilitate assembly. Specifically, during assembly, the main body 21 , the permanent magnet 14 and the yoke 13 can be injection molded, that is, the permanent magnet 14 and the magnet can be placed in a mold. After the main body 21 is injection molded, the permanent magnet 14 and the yoke 13 can be fixedly connected to the main body 21 .

[0064] In some embodiments of the present invention, Figure 2 The permanent magnet 14 is arc-shaped, and the diameter of the inner circumferential wall of the main body 21 is the same as the inner diameter of the permanent magnet 14. This maximizes the contact area between the permanent magnet 14 and the main body 21, improving the magnetic energy output and structural stability of the motor. It also improves the compactness of the structure and reduces errors.

[0065] In some embodiments of the present invention, the inner side of the permanent magnet 14 is approximately flush with the inner circumferential wall of the main body 21 , which helps to improve the integrity and structural stability of the fan assembly 100 .

[0066] Specifically, combined Figure 3 In some embodiments of the present invention, the peripheral wall 211 of the main body is configured to form a first accommodating cavity 201 and a plurality of second accommodating cavities 202. The first accommodating cavity 201 surrounds the peripheral wall, and the plurality of second accommodating cavities 202 are circumferentially spaced apart on the inner side of the peripheral wall. The plurality of second accommodating cavities 202 are all connected to the first accommodating cavity 201. The yoke 13 is provided in the first accommodating cavity 201, and the plurality of permanent magnets 14 are correspondingly provided in the plurality of second accommodating cavities 202. Thus, the peripheral wall 211 of the main body can support and fix the yoke 13 and the permanent magnet 14, and the first accommodating cavity 201 and the second accommodating cavity 202 are connected so that the outer wall of the permanent magnet 14 can fit the inner wall of the yoke 13.

[0067] In some embodiments of the present invention, the impeller device 20 is an integrally formed structure, and the rotor device 10 is integrally formed in the impeller device 20 to facilitate manufacturing and assembly.

[0068] Specifically, the impeller device 20 is injection molded, which is beneficial to improving the manufacturing efficiency and manufacturing accuracy of the impeller device 20. In addition, the rotor device 10 and the impeller device 20 can be injection molded as one piece, which is beneficial to improving the manufacturing efficiency and structural stability of the fan assembly 100. In the related art, the multiple components of the rotor need to be connected to the impeller separately, the assembly process is complicated, and the assembly accuracy requirements are high. The fan assembly 100 proposed in this application can form the multiple components of the rotor device 10 and the impeller device 20 as one piece, which is beneficial to improving assembly efficiency and reducing assembly errors. In the related art, the impeller made of metal needs to process the impeller upper cover, lower cover, and blades separately, and then assemble them into a whole through processes such as riveting or welding. On the one hand, the impeller processed in this way is heavier, and the corresponding motor power also needs to be designed to be larger. On the other hand, through the assembly of the three components, the initial dynamic balance is difficult to control, and the efficiency of the fan will also be greatly affected. The impeller device 20 in the present application can improve manufacturing efficiency and facilitate lightweighting through one-piece injection molding. In addition, the injection-molded impeller device 20 in the present application can also inject the rotating shaft 11, end plate 12, yoke 13 and multiple permanent magnets 14 of the rotor device 10 into the main body 21 of the impeller device 20. Therefore, the yoke 13 and the permanent magnet 14 do not need to be separately fixed on the fan stator assembly, which helps to simplify the assembly process.

[0069] According to an embodiment of the present invention, the outer rotor fan includes a stator assembly and the aforementioned fan assembly 100. The fan assembly 100 is connected to the stator assembly, so that the impeller device 20 and the rotor device 10 can be assembled on the fan at the same time, which is conducive to simplifying the assembly process and improving the assembly efficiency of the outer rotor fan.

[0070] It should be noted that the fan assembly in this application can be understood as a rotor assembly. An external rotor fan is generally composed of a stator assembly and a rotor assembly. Therefore, the fan assembly in this application can be connected to the stator assembly to form an external rotor fan.

[0071] A fan assembly 100 according to a specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0072] Combine Figures 1 to 5 According to an embodiment of the present invention, a fan assembly 100 includes an impeller assembly 20 and a rotor assembly 10. The rotor assembly 10 includes an end plate 12, a yoke 13, a permanent magnet 14, and a rotating shaft 11. The impeller assembly 20 includes a main body 21, a first cover plate 24, a second cover plate 26, and a plurality of blades 23.

[0073] The blades 23 extend axially. The first cover plate 24 is connected to the first axial end of the blades 23, and the second cover plate 26 is connected to the second axial end of the blades 23. The first cover plate 24 is connected to the main body 21 via reinforcing ribs. The yoke 13 and the permanent magnet 14 are disposed on the peripheral wall 211 of the main body. The rotating shaft 11 is disposed within the sleeve 22 of the main body 21. The end plate 12 is supported between one side of the peripheral wall 211 of the main body and the sleeve 22. The end plate 12 is disposed on one side of the permanent magnet 14 on the rotating shaft 11 and is not directly connected to the permanent magnet 14 or the rotating shaft 11. The inner wall of the yoke 13 is in contact with the outer wall of the permanent magnet 14. The impeller device 20 is integrally connected to the end plate 12, the yoke 13, the permanent magnet 14, and the rotating shaft 11 by injection molding. The impeller device 20 is integrally injection molded. During manufacturing, the end plate 12, the yoke 13, the permanent magnet 14 and the rotating shaft 11 can be pre-placed in the mold. After injection molding, the aforementioned components can be directly connected to the impeller device 20, which is conducive to improving manufacturing accuracy.

[0074] According to the rotor assembly of the present invention, the end plate 12, the yoke 13, the permanent magnet 14 and the rotating shaft 11 are formed into a whole through the impeller device 20. The integrated rotor device 10 has high size and shape and position accuracy. In addition, it reduces the assembly errors of the various components, improves the initial dynamic balance accuracy of the rotor, and is beneficial to improving the overall efficiency of the fan.

[0075] Combine Figure 3 The aforementioned axial direction can refer to the up and down direction in the figure, and the aforementioned radial direction can refer to the left and right direction in the figure.

[0076] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "left", "right", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0078] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0079] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A fan assembly, characterized in that: include: A rotor device, comprising a rotating shaft, an end plate, a yoke and a plurality of permanent magnets; An impeller device is connected to the rotor device, and the impeller device includes a structure in which the rotating shaft, the end plate, the magnetic yoke and the permanent magnet are integrally formed.

2. The fan assembly according to claim 1, characterized in that The impeller device comprises a main body portion arranged around the rotating shaft, and the main body portion is integrally formed.

3. The fan assembly according to claim 2, characterized in that: The main body integrally forms the rotating shaft, the end plate, the yoke, and the permanent magnet.

4. The fan assembly according to claim 2, characterized in that: The impeller device includes a first cover plate, the first cover plate is connected to the main body, and the first cover plate is integrally formed.

5. The fan assembly according to claim 4, characterized in that: The impeller device also includes a second cover plate and a plurality of blades, which are arranged at intervals around the outer circumference of the main body; the opposite ends of the blades are respectively connected to the first cover plate and the second cover plate, and the first cover plate, the second cover plate and the plurality of blades are integrally formed.

6. The fan assembly according to claim 4, characterized in that: The first cover plate is provided with a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, one end of the first reinforcing rib is connected to the main body, and the other end is connected to the second reinforcing rib, and the second reinforcing rib is connected to the first cover plate; and / or A first flange is provided on a side of the first cover away from the main body, and the first flange extends in a direction away from the main body.

7. The fan assembly according to claim 5, characterized in that: The second cover plate is opposite to the first cover plate along the extension direction of the rotating shaft. The second cover plate includes a plate portion. The multiple blades are connected to the plate portion. The plate portion is annular. The outer periphery of the plate portion is provided with a second flange. The second flange extends in a direction away from the first cover plate. The inner periphery of the plate portion is provided with a flow guide extending in the same direction as the second flange. The inner diameter of the flow guide gradually decreases in the direction away from the plate portion.

8. The fan assembly according to claim 2, characterized in that: The end plate is arranged on one side of the main body and connects the main body and the rotating shaft. The end plate includes a flat plate portion and a folded edge portion. The outer periphery of the flat plate portion is connected to the folded edge portion. A through hole is provided on the inner side of the flat plate portion. The rotating shaft is passed through the through hole. The folded edge portion is integrally formed on the peripheral wall of the main body and extends toward the permanent magnet.

9. The fan assembly according to claim 8, characterized in that: The main body includes a sleeve, an inner wall of the sleeve is connected to the rotating shaft, and the sleeve is connected to the flat plate portion.

10. The fan assembly according to claim 8, characterized in that The flat plate portion is provided with a plurality of ribs, and the plurality of ribs are arranged at intervals; and / or The flat plate portion is provided with a plurality of through holes, the plurality of through holes are arranged at intervals, and a portion of the main body portion passes through the through holes.

11. The fan assembly according to claim 10, characterized in that: The protrusion direction of the plurality of ribs is away from the peripheral wall of the main body; and / or The plurality of ribs are arranged divergently on the flat plate portion; and / or The plurality of through holes are arranged in a divergent manner on the flat plate portion; and / or The plurality of ribs and the plurality of through holes are arranged at intervals.

12. The fan assembly according to claim 2, characterized in that The permanent magnet and the magnetic yoke are arranged on the peripheral wall of the main body, and the outer wall of the permanent magnet is in contact with the inner wall of the magnetic yoke; The permanent magnet is arc-shaped, and the diameter of the inner peripheral wall of the main body is the same as the diameter of the inner wall of the permanent magnet; or The inner side of the permanent magnet is approximately flush with the inner peripheral wall of the main body.

13. The fan assembly according to claim 2, characterized in that The peripheral wall of the main body is configured to form a first accommodating cavity and a plurality of second accommodating cavities, wherein the first accommodating cavity surrounds the peripheral wall, and the plurality of second accommodating cavities are arranged on the inner side of the peripheral wall at intervals along the circumferential direction, and the plurality of second accommodating cavities are all connected to the first accommodating cavity, the magnetic yoke is arranged in the first accommodating cavity, and the plurality of permanent magnets are correspondingly arranged in the plurality of second accommodating cavities.

14. The fan assembly according to any one of claims 1 to 13, characterized in that: The impeller device is injection-molded, and the rotor device is integrally formed in the impeller device.

15. External rotor fan, characterized in that: include: stator assembly, The fan assembly according to any one of claims 1 to 14, wherein the fan assembly is connected to the stator assembly.

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