Rotor assembly, outer rotor motor, fan component and air conditioner

Abstract

The utility model discloses a rotor assembly, an external rotor motor, a fan component and an air conditioner, the rotor assembly comprises a support frame, a rotating shaft and a magnetic ring, and the rotating shaft is connected to the support frame; the magnetic ring is connected to the edge of the supporting frame, the magnetic ring is in a circular tube shape and surrounds the rotating shaft, and the magnetic ring and the supporting frame are matched to form a stator containing cavity with one open end; wherein the magnetic ring is a nylon magnetic powder mixed integral injection molding part. According to the rotor assembly provided by the embodiment of the utility model, the magnetic ring adopts a processing mode of mixing nylon and magnetic powder and integrally forming, so that the precision of the magnetic ring can be improved, and miniaturization and light weight of an external rotor motor can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor assembly, an outer rotor motor, a fan component and an air conditioner. Background Art

[0002] In related technologies, the rotor assembly is generally composed of a magnetic tile, a magnetic yoke, a rotating shaft, and a support frame that plays a necessary connecting and supporting role. Multiple magnetic tiles are generally connected to the magnetic yoke through processes such as gluing or injection molding. However, in some technologies, the design of the rotor assembly is not reasonable, which may affect the performance of the motor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a rotor assembly, an outer rotor motor, a fan component and an air conditioner, wherein the magnetic ring is processed by a nylon and magnetic powder mixed integral molding method, which can improve the precision of the magnetic ring and is conducive to miniaturization and lightness of the outer rotor motor.

[0004] An embodiment of the present application provides a rotor assembly, comprising: a support frame; a rotating shaft, the rotating shaft being connected to the support frame; a magnetic ring, the magnetic ring being connected to the edge of the support frame, the magnetic ring being in a cylindrical shape and being arranged around the rotating shaft, the magnetic ring and the support frame cooperating to form a stator accommodating cavity with one end open; wherein the magnetic ring is a nylon magnetic powder mixed one-piece injection molded part.

[0005] In the above technical scheme, by adopting the method of mixing nylon and magnetic powder to form a magnetic ring, that is, the magnetic ring can be injection molded in a mold, the dimensional accuracy of the magnetic ring can be effectively improved, and the subsequent processing of the magnetic ring is convenient, which is beneficial to improving the uniformity of the rotor air gap, and is beneficial to improving the stability of the operation of the outer rotor motor, and reducing the occurrence of vibration, noise and other problems in the outer rotor motor. Secondly, in some embodiments, nylon and magnetic powder are mixed and molded into a magnetic ring, so that the magnetic ring can be magnetized in a molten state, and the magnetic powder in the magnetic ring can be arranged according to the magnetizing magnetic field, which can eliminate or reduce the occurrence of magnetic leakage on the outside of the magnetic ring. After the magnetic ring is arranged in this way, the setting of the yoke can be cancelled, and it is beneficial to the light weight and high strength characteristics of nylon, which is conducive to the miniaturization and lightweight of the outer rotor motor.

[0006] In some embodiments of the present application, the rotor assembly further includes at least two connecting members, one end of the connecting member is connected to the support frame, and the other end of the connecting member is located on a side of the support frame away from the stator accommodating cavity to connect to a wind wheel.

[0007] In some embodiments of the present application, the connecting member is a screw column evenly spaced along the circumferential direction, each of the screw columns includes an anti-rotation section and a threaded section, one end of the anti-rotation section is connected to the support frame, and the threaded section is connected to the other end of the anti-rotation section.

[0008] In some embodiments of the present application, the rotor assembly further includes: heat dissipation blades disposed on the support frame.

[0009] In some embodiments of the present application, the heat dissipation blade includes: an inner blade ring, which is arranged around the rotating shaft; an outer blade ring, which is arranged around the inner blade ring at intervals; and a plurality of blades, which are connected between the inner blade ring and the outer blade ring at intervals along the circumferential direction.

[0010] In some embodiments of the present application, the heat dissipation blade is an integral injection-molded part.

[0011] In some embodiments of the present application, the support frame includes: a first support frame, the rotating shaft is connected to the center of the first support frame; a second support frame, the second support frame is annular and is arranged around the first support frame, the heat dissipation blades are annular and connected between the first support frame and the second support frame, and the magnetic ring is connected to the edge of the second support frame.

[0012] In some embodiments of the present application, the support frame is an integral injection-molded part, and the rotating shaft and the magnetic ring are fixedly connected to the support frame through injection molding of the support frame.

[0013] In a second aspect, an embodiment of the present application provides an external rotor motor, comprising: a stator assembly, the stator assembly comprising a stator, the stator having a center hole; a rotor assembly, the rotor assembly being the rotor assembly according to the embodiment of the first aspect of the utility model, the magnetic ring being rotatably covered on the outside of the stator, the rotating shaft being passed through the center hole, the rotating shaft and the stator being rotatably engaged through a bearing engaged in the center hole and sleeved on the outside of the rotating shaft.

[0014] In the above technical solution, by adopting the above rotor assembly, the miniaturization and lightness of the outer rotor motor can be achieved.

[0015] In a third aspect, an embodiment of the present application provides a fan component, including a crossflow impeller and an outer rotor motor according to the embodiment of the second aspect of the utility model, wherein the outer rotor motor is connected to one axial end of the crossflow impeller.

[0016] In the above technical solution, by adopting the above outer rotor motor, the stability of the fan components can be improved.

[0017] In a fourth aspect, an embodiment of the present application provides an air conditioner, comprising a fan component according to the embodiment of the third aspect of the utility model.

[0018] In the above technical solution, the performance of the air conditioner can be improved by adopting the above fan component.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a schematic diagram of a stator assembly provided in some embodiments of the present application;

[0022] Figure 2 is a cross-sectional view of a stator assembly provided in some embodiments of the present application;

[0023] Figure 3 is an exploded view of a stator assembly provided in some embodiments of the present application;

[0024] Figure 4 is a schematic diagram of an outer rotor motor provided in some embodiments of the present application;

[0025] Figure 5 is a cross-sectional view of an outer rotor motor provided in some embodiments of the present application;

[0026] Figure 6 It is an exploded diagram of an outer rotor motor provided in some embodiments of the present application.

[0027] Reference numerals:

[0028] Outer rotor motor 200, annular gap 6, end gap 7,

[0029] Stator assembly 101, stator 1011, bearing seat 10111, center hole 10111a, groove 10111b, cooling air duct 10111c, stator body 10112, installation cavity 10112a, stator winding 1012, bearing 1013, support seat 1014, retaining spring 1015,

[0030] Rotor assembly 100,

[0031] Support frame 1, mounting hole 11, first support frame 12, second support frame 13,

[0032] Axis 2,

[0033] Magnetic ring 3, stator accommodating cavity 31,

[0034] Connecting piece 4, screw column 41, anti-rotation section 411, threaded section 412,

[0035] Heat dissipation blades 5 , inner blade ring 51 , outer blade ring 52 , and blades 53 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0038] Hereinafter, a rotor assembly 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0039] like Figure 1-Figure 3 As shown, according to the embodiment of the utility model, the rotor assembly 100 includes a support frame 1, a rotating shaft 2 and a magnetic ring 3, wherein the rotating shaft 2 is connected to the support frame 1; the magnetic ring 3 is connected to the edge of the support frame 1, the magnetic ring 3 is in a cylindrical shape and is arranged around the rotating shaft 2, and the magnetic ring 3 cooperates with the support frame 1 to form a stator accommodating cavity 31 with one end open; wherein the magnetic ring 3 is a nylon magnetic powder mixed one-piece injection molding.

[0040] Therefore, by setting nylon (such as PA66, polymerized polyamide resin) and magnetic powder (such as ferrite magnetic powder) to be mixed and integrally injected to form the magnetic ring 3, it is convenient to process and mold the magnetic ring 3, and after the magnetic ring 3 is injection molded, it is convenient to fine-process the magnetic ring 3, and the dimensional accuracy of the magnetic ring 3 can be improved. Secondly, during the injection molding process of the magnetic ring 3 (for example, the magnetic ring 3 is in a molten state), it is convenient to magnetize the magnetic ring 3 through a magnetizing device (such as a magnetizing coil), so that the magnetic powder can be arranged according to the magnetizing magnetic field, so that the magnetic ring 3 has a more rational magnetic field, so that the magnetic ring 3 has better performance. For example, during the injection molding process, the magnetizing device chooses to perform sinusoidal magnetization when the magnetic ring 3 is in a molten state, so that the magnetic powder or magnetic domains in the magnetic ring 3 are arranged according to a certain rule, so that the magnetic lines of force on the magnetic ring 3 present a sinusoidal distribution.

[0041] It should be noted that, during the injection molding process of the magnetic ring 3, the nylon is in a fluid state, and the nylon is mixed with magnetic powder and injected into the mold together. The magnetic powder is a solid particle. When the nylon is solidified and cooled, the magnetic powder is mixed with the nylon and molded into the desired shape and size of the magnetic ring 3. The mold can improve the dimensional accuracy of the magnetic ring 3. Thus, the nylon and the magnetic powder are mixed and formed into the magnetic ring 3 by injection molding, so that the proportion (such as content) of the magnetic powder in the magnetic ring 3 and the uniformity of the mixing of the magnetic powder and the nylon are controllable, which is convenient for adjusting the magnetic force of the magnetic ring 3. The nylon is light in weight, which is conducive to reducing the weight of the magnetic ring 3. The injection molded magnetic ring 3 is easy to process and is conducive to improving the dimensional accuracy of the magnetic ring 3. Among them, the melted nylon and the magnetic powder are mixed more evenly, and the nylon fluid can effectively support the magnetic powder. The magnetic ring 3 can be magnetized in a molten state so that the magnetic powder can move according to the magnetizing magnetic field and be arranged according to a certain rule.

[0042] In some technologies, the magnetic ring includes multiple magnetic tiles, which are formed into an annular structure by a mold or tooling, such as by gluing or injection molding, so that the multiple magnetic tiles are formed into a rotor magnetic material. The assembly difficulty is relatively high, and the roundness of the magnetic ring will be affected by the size and individual performance differences of the magnetic tiles, and the dimensional accuracy of the tooling or mold, which may cause the air gap (such as the annular gap below) between the stator assembly and the rotor assembly to be uneven, that is, it may cause the motor to be prone to unstable fluctuations, vibrations, or noise during operation, affecting the efficiency of the motor. In addition, the magnetic ring formed by multiple magnetic tiles requires a yoke to form a magnetic circuit during radial magnetization to avoid magnetic leakage, but the presence of the yoke is not conducive to the miniaturization and lightweight of the outer rotor motor.

[0043] In the embodiment of the present application, by adopting the method of mixing nylon and magnetic powder to form a magnetic ring 3, that is, the magnetic ring 3 is injection molded in a mold, the dimensional accuracy of the magnetic ring 3 can be effectively improved, and the subsequent processing of the magnetic ring 3 is convenient, which is conducive to improving the uniformity of the rotor air gap, and is conducive to improving the smooth and stable operation of the outer rotor motor 200, and reducing the occurrence of vibration, noise and other problems of the outer rotor motor 200. Secondly, in some embodiments, nylon and magnetic powder are mixed and molded into a magnetic ring 3, so that the magnetic ring 3 can be magnetized in a molten state, and the magnetic powder in the magnetic ring 3 can be arranged according to the magnetizing magnetic field. For example, the magnetic ring 3 is sinusoidally magnetized, and the magnetic lines of force of the magnetic ring 3 are sinusoidally distributed, which can eliminate or reduce the occurrence of magnetic leakage outside the magnetic ring 3. The magnetic ring 3 is set in this way, the setting of the yoke can be cancelled, and it is conducive to the light weight and high strength characteristics of nylon, which is conducive to the miniaturization and lightweight of the outer rotor motor 200.

[0044] In some embodiments of the present application, Figure 1 and Figure 3 The rotor assembly 100 further includes at least two connectors 4, one end of the connector 4 is connected to the support frame 1, and the other end of the connector 4 is located on the side of the support frame 1 away from the stator accommodating cavity 31 to connect the wind wheel. For example, the wind wheel is connected to the end face of the rotor assembly 100 (such as the support frame 1) by flange connection, and is positioned by multiple connectors 4 to fix the wind wheel to the rotor assembly 100, so that the end face of the wind wheel matches the end face of the rotor assembly 100. Thus, when the motor is working, the rotor assembly 100 rotates, and the rotor assembly 100 transmits torque to the wind wheel through multiple connectors 4 to drive the wind wheel to rotate.

[0045] In the above technical solution, by setting a connector 4 to connect the support frame 1 and the wind wheel (such as the crossflow wind wheel hereinafter), that is, by using the connector 4 to drive the wind wheel to rotate the rotor assembly 100, the shaft 2 does not play the role of transmitting torque to drive the wind wheel to rotate, and the use strength requirement of the shaft 2 can be reduced, that is, the size of the shaft 2 can be appropriately reduced (for example, the diameter of the shaft 2 can be reduced), which is conducive to reducing the size and mass of the rotor assembly 100, that is, it is conducive to achieving lightweight and miniaturization of the outer rotor motor 200. For example, in some examples, the diameter of the shaft 2 is 8mm. Compared with the design scheme of transmitting torque through the shaft 2, the shaft 2 of the present application can adopt a smaller shaft diameter and a shorter shaft length, which is conducive to miniaturization and lightweight of the outer rotor motor 200.

[0046] Optionally, combined Figure 1, multiple connectors 4 are sequentially arranged on the support frame 1 along the circumference of the magnetic ring 3, and the connectors 4 are spaced apart from the rotating shaft 2 along the radial direction of the magnetic ring 3. Therefore, the distance between the connectors 4 and the rotating shaft 2 is appropriate, so the force radius of the connectors 4 is large and the shear force is small, which facilitates the rotor assembly 100 to stably drive the wind wheel to rotate through the connectors 4, and improves the stability and reliability of the outer rotor motor 200 driving the wind wheel to rotate.

[0047] In some embodiments of the present application, Figure 1 and Figure 3 The connecting member 4 is a screw column 41 evenly spaced along the circumferential direction. Each screw column 41 includes an anti-rotation section 411 and a threaded section 412. One end of the anti-rotation section 411 is connected to the support frame 1, and the threaded section 412 is connected to the other end of the anti-rotation section 411.

[0048] For example, combined with Figure 1 and Figure 3 The support frame 1 is formed with three screw holes, and three screw columns 41 are respectively arranged in the corresponding screw holes, and the three screw columns 41 are arranged at equal intervals along the circumference of the magnetic ring 3, and the three screw columns 41 are arranged on the radial outer side of the rotating shaft 2, each screw column 41 includes an anti-rotation section 411 and a threaded section 412, the anti-rotation section 411 is formed into a rectangular structure, and one end of the anti-rotation section 411 is connected to the support frame 1, and the threaded section 412 is arranged at the end of the anti-rotation section 411 away from the support frame 1, and the threaded section 412 is connected to the wind wheel, so that the anti-rotation section 411 can prevent the screw column 41 from rotating relative to the support frame 1 to a certain extent, so as to improve the connection stability between the screw column 41 and the support frame 1, and facilitate the stability of the rotating assembly driving the wind wheel to rotate through the three screw columns 41. For example, in some examples, the screw column 41 adopts a specification of 3mm in diameter, which can make the screw column 41 have suitable strength and a small volume.

[0049] In the above technical solution, by setting one end of the anti-rotation section 411 to be connected to the support frame 1, the anti-rotation section 411 can prevent the screw column 41 from rotating relative to the support frame 1 to a certain extent, so as to improve the connection stability between the screw column 41 and the support frame 1, and facilitate the stability of the rotating assembly driving the wind wheel to rotate through the three screw columns 41.

[0050] In some embodiments of the present application, Figure 1 and Figure 2 The rotor assembly 100 also includes a heat dissipation blade 5 arranged on the support frame 1.

[0051] In the above technical solution, by arranging the heat dissipation blades 5 arranged on the support frame 1, the heat dissipation blades 5 can rotate with the rotor assembly 100 to flow air in the stator accommodating cavity 31, that is, the air flow can flow in the outer rotor motor 200, so as to realize the air circulation flow between the stator accommodating cavity 31 and the external environment, so that the circulating air flow can continuously take away the heat generated by the outer rotor motor 200 during operation, so that the operating temperature of the outer rotor motor 200 is maintained within a reasonable range, which is beneficial to improving the power density and performance of the outer rotor motor 200.

[0052] Optionally, combined Figure 1 and Figure 2 The support frame 1 is provided with a mounting hole, and the mounting hole is set through at least one side facing the stator accommodating cavity 31, and the wind wheel is set in the mounting hole. Therefore, by providing the mounting hole on the support frame 1 and arranging the heat dissipation fan blade 5 in the mounting hole, the support frame 1 can accommodate at least part of the heat dissipation fan blade 5, and the space occupied by the heat dissipation fan blade 5 in the stator accommodating cavity 31 can be reduced.

[0053] In some embodiments of the present application, Figure 1 and Figure 3 The heat dissipation fan blade 5 includes an inner blade ring 51, an outer blade ring 52 and a plurality of blades 53. The inner blade ring 51 is arranged around the rotating shaft 2; the outer blade ring 52 is arranged around the inner blade ring 51 at intervals; and the blades 53 are connected between the inner blade ring 51 and the outer blade ring 52 at intervals along the circumferential direction. Thus, the heat dissipation fan blade 5 is fixedly arranged by the inner blade ring 51 and the outer blade ring 52, and the plurality of blades 53 rotate with the rotor assembly 100 to form an airflow, so that the outer rotor motor 200 can be continuously cooled.

[0054] For example, combined with Figure 1 and Figure 3 The support frame 1 is formed with a mounting hole, the magnetic ring 3 is connected to the edge of the support frame 1, and the magnetic ring 3 is arranged around the rotating shaft 2, and the heat dissipation fan 5 is arranged on the mounting hole, the end of the heat dissipation fan 5 facing the external environment is the air outlet end, and the end of the heat dissipation fan 5 facing the stator accommodating chamber 31 is the air inlet end, and the heat dissipation fan 5 includes an inner blade ring 51, an outer blade ring 52 and a plurality of blades 53, the inner blade ring 51 and the outer blade ring 52 are arranged around the rotating shaft 2, and the outer blade ring 52 and the inner blade ring 51 are arranged radially spaced, the inner blade ring 51 is arranged on the inner wall of the mounting hole, the outer blade ring 52 is arranged on the outer wall of the mounting hole, and the plurality of blades 53 are arranged between the inner blade ring 51 and the outer blade ring 52. Thus, the heat dissipation fan 5 can rotate with the rotor assembly 100, and the plurality of blades 53 form an air pressure difference between the air inlet end and the air outlet end, so that the air in the stator accommodating chamber 31 is directed toward the air inlet end, so as to realize the air circulation flow between the stator accommodating chamber 31 and the external environment.

[0055] In some embodiments of the present application, the heat dissipation blade 5 is an integral injection molded part, thereby improving the structural strength of the heat dissipation blade 5, improving the working performance of the heat dissipation blade 5, and simplifying the processing difficulty of the heat dissipation blade 5. For example, the heat dissipation blade 5 can be an aluminum alloy injection molded part.

[0056] In some embodiments of the present application, Figure 1 and Figure 3 , the support frame 1 includes a first support frame 12 and a second support frame 13, the rotating shaft 2 is connected to the center of the first support frame 12; the second support frame 13 is annular and arranged around the first support frame 12, the heat dissipation blades 5 are annular and connected between the first support frame 12 and the second support frame 13, and the magnetic ring 3 is connected to the edge of the second support frame 13. Therefore, the first support frame 12 and the second support frame 13 can realize the coordination between the rotating shaft 2 and the magnetic ring 3, and it is convenient to arrange the heat dissipation blades 5 between the first support frame 12 and the second support frame 13, which is conducive to making the arrangement of the components of the rotor assembly 100 compact. For example, combined with Figure 3 A mounting hole is defined between the first support frame 12 and the second support frame 13, and the heat dissipation blade 5 is arranged in the mounting hole.

[0057] In some embodiments of the present application, the support frame 1 is an integral injection-molded part, and the rotating shaft 2 and the magnetic ring 3 are fixedly connected to the support frame 1 through injection molding of the support frame 1. Therefore, the rotating shaft 2 and the magnetic ring 3 can be connected through the injection molding process of the support frame 1, thereby improving the overall connection strength of the support frame 1, the rotating shaft 2 and the magnetic ring 3, and simplifying the processing difficulty of the rotor assembly 100, making it easier to assemble the outer rotor motor 200.

[0058] Optionally, in some embodiments, the rotor assembly 100 further includes a connector 4 and a heat dissipation blade 5, one end of the connector 4 is connected to the support frame 1, and the other end of the connector 4 is located on a side of the support frame 1 away from the stator accommodating cavity 31 to connect to the wind wheel, and the heat dissipation blade 5 is provided on the support frame 1. The rotating shaft 2, the magnetic ring 3, the connector 4 and the heat dissipation blade 5 are all fixedly connected to the support frame 1 through injection molding of the support frame 1. Thus, the rotating shaft 2, the magnetic ring 3, the connector 4, the heat dissipation blade 5 and the support frame 1 can be integrally injection molded, which can improve the connection strength of the rotor assembly 100, and can simplify the processing difficulty and assembly difficulty of the rotor assembly 100, and facilitate the assembly of the outer rotor motor 200. For example, the shaft 2, the magnetic ring 3, the connector 4 and the heat dissipation fan 5 are injection molded together in a mold (such as an injection mold), and the injection molded component is a support frame 1, which connects the shaft 2, the magnetic ring 3, the connector 4 and the heat dissipation fan 5, wherein the support frame 1 is formed with a mounting hole, and the heat dissipation fan 5 is arranged in the mounting hole. Therefore, by positioning the mold, the assembly accuracy of multiple components of the rotor assembly 100 can be improved, such as the concentricity of the magnetic ring 3 and the shaft 2, or the distance accuracy between the connector 4 and the shaft 2, etc.

[0059] In the second aspect, the embodiment of the present application provides an outer rotor motor 200 including a stator assembly 101 and a rotor assembly 100, the stator assembly 101 including a stator 1011, the stator 1011 having a center hole 10111a; the rotor assembly 100 is a rotor assembly 100 according to the embodiment of the first aspect of the utility model, the magnetic ring 3 is rotatably covered on the outside of the stator 1011, the rotating shaft 2 is passed through the center hole 10111a, and the rotating shaft 2 and the stator 1011 are rotatably matched through a bearing 1013 that is matched in the center hole 10111a and sleeved on the outside of the rotating shaft 2.

[0060] In the above technical solution, by adopting the above rotor assembly 100, the outer rotor motor 200 can be miniaturized and lightweight.

[0061] Optionally, the support frame 1 is an integral injection molded part, and the rotating shaft 2 and the magnetic ring 3 are fixedly connected to the support frame 1 through injection molding of the support frame 1. The concentricity of the rotating shaft 2 and the magnetic ring 3 can be improved, and the rotating shaft 2 cooperates with the bearing 1013 (such as the inner ring of the bearing), which can improve the concentricity of the magnetic ring 3 and the stator 1011, facilitate the concentricity of the magnetic ring 3 and the stator 1011, and help improve the uniformity of the air gap between the stator assembly 101 and the rotor assembly 100 (such as the stator 1011 and the magnetic ring 3). For example, in some examples, the designed air gap between the stator assembly 101 and the rotor assembly 100 is 0.5 mm, which can make the outer rotor motor 200 have better efficiency.

[0062] In some embodiments of the present application, Figure 4-Figure 6 A mounting hole is provided on the support frame 1, and the mounting hole is through-set at least on the side facing the stator 1011. The rotor assembly 100 also includes a heat dissipation blade 5 assembled in the mounting hole, and the air inlet end or the air outlet end of the heat dissipation blade 5 is arranged toward the stator 1011; the outer rotor motor 200 is provided with a cooling air duct 10111c, and the cooling air duct 10111c is connected to the mounting hole.

[0063] For example, combined with Figure 5 and Figure 6The support frame 1 is located at one axial end of the stator 1011, and an end gap 7 is provided between the stator 1011 and the support frame 1. The magnetic ring 3 is connected to the support frame 1 and is arranged around the stator 1011 so that the magnetic ring 3 and the support frame 1 are covered on the outside of the stator 1011, and an annular gap 6 is formed between the magnetic ring 3 and the stator 1011, and the annular gap 6 is connected with the end gap 7. The support frame 1 is provided with a mounting hole, and the mounting hole is arranged through a side toward the stator 1011, and a heat dissipation fan 5 is provided in the mounting hole to ensure that the connection between the heat dissipation fan 5 and the mounting hole is reliable. The air inlet end of the heat dissipation fan 5 is arranged toward the stator 1011, and the air outlet end of the heat dissipation fan 5 is arranged toward the external environment, and a cooling air duct 10111c is provided in the outer rotor motor 200, and the cooling air duct 10111c is connected with the end gap 7.

[0064] When the outer rotor motor 200 is working, the heat dissipation blades 5 rotate to drive the air flow in the outer rotor motor 200, and the air from the external environment flows into the cooling air duct 10111c and flows to the end gap 7, and then the air flows from the end gap 7 to the air inlet end of the heat dissipation blade 5 and flows out from the air outlet end through the air outlet. Thus, the heat dissipation blades 5 rotate to drive the air flow in the outer rotor motor 200, and the air from the external environment flows into the cooling air duct 10111c and flows to the end gap 7, and then the air flows from the end gap 7 to the air inlet end of the wind wheel and flows out from the air outlet end through the air outlet, so as to realize the circulation of the air flow in the outer rotor motor 200, so as to continuously cool the outer rotor motor 200.

[0065] Optionally, the support frame 1 is provided with a mounting hole that penetrates the support frame 1 axially or radially along the stator 1011. For example, the support frame 1 is formed with mounting holes that penetrate the thickness of the support frame 1 on both sides along the radial direction of the stator 1011. The heat dissipation fan blade 5 is arranged in the mounting hole, the air inlet end of the heat dissipation fan blade 5 faces the external environment, the air outlet end of the heat dissipation fan blade 5 faces the stator 1011, the air outlet end of the heat dissipation fan blade 5 is connected with the end gap 7, one end of the cooling air duct 10111c is connected with the end gap 7, and the other end is connected with the external environment. When the heat dissipation fan blade 5 rotates, the air of the external environment is sucked in from the air inlet end of the radial outer side of the outer rotor motor 200 and blown toward the stator 1011 from the air outlet end, and then the airflow flows to the end gap 7 and flows into the cooling air duct 10111c, and finally flows from the cooling air duct 10111c to the external environment, so as to realize the circulation of the airflow in the outer rotor motor 200, so as to continuously cool the outer rotor motor 200.

[0066] In the above technical solution, a mounting hole is provided on the support frame 1, and the heat dissipation blades 5 are arranged in the mounting hole. The heat dissipation blades 5 can rotate with the support frame 1 to form an air pressure difference between the support frame 1 and the stator 1011, so as to drive the air flow in the cooling duct 10111c, that is, it can drive the air circulation inside the outer rotor motor 200 and the external environment, so that the airflow circulating in the cooling duct 10111c can continuously take away the heat generated by the outer rotor motor 200 during operation, so that the operating temperature of the outer rotor motor 200 is maintained within a reasonable range, which is beneficial to improving the power density and performance of the outer rotor motor 200.

[0067] In some embodiments of the present application, Figure 6 The stator 1011 includes a bearing seat 10111, and a cooling air duct 10111c is formed on the bearing seat 10111. Therefore, by arranging the cooling air duct 10111c to be formed on the bearing seat 10111, the occupied space of the bearing seat 10111 can be effectively utilized, and the arrangement of other components can be avoided to a certain extent.

[0068] For example, combined with Figure 5 and Figure 6 The stator 1011 includes a bearing seat 10111, a center hole 10111a is formed at the center of the bearing seat 10111, and the center hole 10111a penetrates the bearing seat 10111 along the axial direction of the stator 1011, and two grooves 10111b are formed in the bearing seat 10111, and the two grooves 10111b are respectively located at one axial end of the bearing seat 10111, and the bearing 1013 includes a first bearing and a first bearing, and the first bearing and the first bearing are arranged on the rotating shaft 2 along the axial direction of the stator 1011, and the first bearing and the first bearing are respectively arranged in the corresponding grooves 1011b to ensure that the position of the bearing 1013 arranged in the bearing seat 10111 is stable. The support frame 1 is located at one axial end of the stator 1011, and the support frame 1 is connected to the rotating shaft 2, and one axial end of the magnetic ring 3 is connected to the support frame 1 and surrounds the circumference of the stator 1011.

[0069] Among them, the bearing seat 10111 is formed with a cooling air duct 10111c, which runs through the axial ends of the bearing seat 10111. The heat dissipation blade 5 is connected to the support frame 1, and the air inlet side of the heat dissipation blade 5 faces one axial end of the stator 1011. The magnetic ring 3 interacts with the electromagnetic coil (stator winding 1012) included in the stator 1011, and the magnetic ring 3, the support frame 1, the rotating shaft 2 and the heat dissipation blades 5 begin to rotate. The wind wheel forms a low pressure between the support frame 1 and the stator 1011, and the air flow in the cooling duct 10111c will flow toward the air inlet end of the heat dissipation blades 5. The cooling duct 10111c then inhales air from the end of the bearing seat 10111 away from the support frame 1, and flows from the end of the bearing seat 10111 close to the support frame 1 toward the heat dissipation blades 5, so as to realize the circulation of air flow in the bearing seat 10111, and the air flow can exchange heat with the bearing seat 10111 to take away the heat of the bearing seat 10111. The bearing seat 10111 is a part of the stator 1011, and the bearing seat 10111 is in contact with the bearing 1013. Therefore, the heat of the stator 1011 (for example, the heat generated when the electromagnetic coil is working) and the heat generated by the mechanical movement friction of the bearing 1013 can be taken away through the bearing seat 10111, thereby reducing the temperature of the outer rotor motor 200 and improving the power density and performance of the outer rotor motor 200.

[0070] Optionally, the bearing seat 10111 is a heat conductor. Thus, the heat transfer efficiency of the bearing seat 10111 can be improved, and the bearing seat 10111 can quickly transfer the heat generated by the heat source components (such as the stator winding 1012 and the bearing 1013) of the outer rotor motor 200, and diffuse the heat to the external environment through the cooling air duct 10111c, thereby improving the heat dissipation effect of the outer rotor motor 200. For example, the bearing seat 10111 is a metal part (such as an aluminum part, etc.).

[0071] Optionally, combined Figure 5 The outer rotor motor 200 further includes a retaining spring 1015, which is disposed on the rotating shaft 2 and clamped on the side of the bearing 1013 away from the bearing seat 10111. The retaining spring 1015 has a certain limiting effect, which can limit the position of the bearing 1013 on the rotating shaft 2. For example, the outer rotor motor 200 further includes two bearings 1013 and two retaining springs 1015, the two bearings 1013 are spaced apart on the rotating shaft 2, and the two retaining springs 1015 are respectively clamped on the sides of the two bearings 1013 that are away from each other.

[0072] Optionally, combined Figure 5 The stator 1011 also includes a stator body 10112 , and the stator body 10112 is formed with a mounting cavity 10112 a , and the mounting cavity 10112 a can be provided with a bearing seat 10111 .

[0073] For example, combined with Figure 5 The stator 1011 includes a stator body 10112 and a bearing seat 10111. The stator body 10112 is formed with an installation cavity 10112a. The installation cavity 10112a penetrates the stator body 10112 along the axial direction of the stator 1011. The bearing seat 10111 is arranged in the installation cavity 10112a, and the bearing seat 10111 is tightly matched with the cavity wall of the installation cavity 10112a. The support frame 1 is located at one axial end of the stator body 10112. The support frame 1 includes a first support frame 12 and a second support frame 13. The first support frame 12 is connected to the rotating shaft 2, and the second support frame 13 is arranged around the first support frame 12, and a mounting hole is defined between the second support frame 13 and the first support frame 12. One axial end of the magnetic ring 3 is connected to the second support frame 13 and surrounds the circumference of the stator body 10112. The heat dissipation blade 5 is arranged in the installation hole.

[0074] Among them, the stator 1011 also includes a stator winding 1012, and the stator body 10112 is formed with a coil slot, and the stator winding 1012 is arranged in the coil slot. The magnetic ring 3 interacts with the stator winding 1012, and the magnetic ring 3, the first support frame 12, the second support frame 13, the rotating shaft 2 and the heat dissipation fan blade 5 begin to rotate. The wind wheel forms a low pressure between the support frame 1 and the stator body 10112, and the airflow in the cooling air duct 10111c will flow toward the air inlet end of the fan. The cooling air duct 10111c inhales air from the end of the bearing seat 10111 away from the support frame 1, and flows toward the wind wheel from the end of the bearing seat 10111 close to the support frame 1, so as to realize the airflow in the bearing seat 101 11 circulates, and the airflow can exchange heat with the bearing seat 10111 to take away the heat of the bearing seat 10111. The bearing seat 10111 contacts the stator body 10112, and the bearing seat 10111 can exchange heat with the stator winding 1012 to take away the heat of the stator winding 1012. The bearing seat 10111 contacts the bearing 1013, and the bearing seat 10111 can exchange heat with the bearing 1013 to take away the heat generated by the mechanical movement friction of the bearing 1013, so that the heat generated by the heat source of the outer rotor motor 200 can be taken away through the bearing seat 10111, and the power density and performance of the outer rotor motor 200 can be improved. For example, the outer rotor motor 200 is an outer rotor permanent magnet synchronous motor, such as an 18-slot 16-pole electromagnetic topology structure, and 18 windings are evenly distributed in the coil slots around the center line of the stator body 10112. The motor has a smaller tooth slot torque, runs more smoothly, and has a higher efficiency.

[0075] Optionally, combined Figure 5The outer rotor motor 200 further includes a support seat 1014 (e.g., a stator BMC support seat), which is used to fix the stator 1011 to ensure that the stator 1011 is stably and reliably arranged. Optionally, the stator 1011 and the support seat 1014 are integrally injection molded, which is beneficial to improving the overall strength of the stator 1011 and the support seat 1014, and is beneficial to simplifying the assembly difficulty of the outer rotor motor 200.

[0076] In some embodiments of the present application, Figure 6 There are at least two cooling air ducts 10111c, which are spaced around the central hole 10111a. Thus, the air flow in the outer rotor motor 200 can be increased, and the heat dissipation uniformity of each part of the bearing seat 10111 is ensured, which is conducive to improving the heat dissipation effect of the outer rotor motor 200.

[0077] For example, combined with Figure 6 The bearing seat 10111 is formed with a plurality of cooling air ducts 10111c, which are arranged in sequence and equidistantly around the center hole 10111a, and the inner wall of the cooling air duct 10111c is spaced from the outer wall of the bearing seat 10111 and the hole wall of the center hole 10111a.

[0078] In a third aspect, an embodiment of the present application provides a fan component, including a crossflow impeller and an outer rotor motor 200 according to the embodiment of the second aspect of the utility model, wherein the outer rotor motor 200 is connected to one axial end of the crossflow impeller.

[0079] In the above technical solution, by adopting the above outer rotor motor 200, the stability of the fan components can be improved.

[0080] In a fourth aspect, an embodiment of the present application provides an air conditioner, comprising a fan component according to the embodiment of the third aspect of the utility model.

[0081] In the above technical solution, the performance of the air conditioner can be improved by adopting the above fan component.

[0082] In the description of the present utility model, it is necessary to understand that the terms "center", "thickness", "upper", "lower", "rear", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0083] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 utility model. In this specification, the schematic representation of the above terms does 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.

[0085] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor assembly, characterized in that: include: Support frame; A rotating shaft, the rotating shaft is connected to the supporting frame; A magnetic ring, the magnetic ring is connected to the edge of the support frame, the magnetic ring is in a cylindrical shape and is arranged around the rotating shaft, and the magnetic ring cooperates with the support frame to form a stator accommodating cavity with one end open; Wherein, the magnetic ring is a nylon magnetic powder mixed integral injection molded part.

2. The rotor assembly according to claim 1, characterized in that It also includes at least two connecting members, one end of which is connected to the support frame, and the other end of which is located on a side of the support frame away from the stator accommodating cavity to connect to the wind wheel.

3. The rotor assembly according to claim 2, characterized in that: The connecting member is a screw column evenly spaced along the circumferential direction, each of the screw columns includes an anti-rotation section and a threaded section, one end of the anti-rotation section is connected to the support frame, and the threaded section is connected to the other end of the anti-rotation section.

4. The rotor assembly according to claim 1, characterized in that: Also includes: Heat dissipation blades are arranged on the support frame.

5. The rotor assembly according to claim 4, characterized in that: The heat dissipation blades include: An inner blade ring, the inner blade ring is arranged around the rotating shaft; An outer blade ring, the outer blade ring is arranged around the inner blade ring at intervals; A plurality of blades are connected between the inner blade ring and the outer blade ring at circumferential intervals.

6. The rotor assembly according to claim 4, characterized in that: The heat dissipation fan blade is an integral injection-molded part.

7. The rotor assembly according to claim 4, characterized in that The support frame comprises: A first support frame, wherein the rotating shaft is connected to the center of the first support frame; The second support frame is in the shape of a circular ring and is arranged around the first support frame. The heat dissipation blades are in the shape of a ring and are connected between the first support frame and the second support frame. The magnetic ring is connected to the edge of the second support frame.

8. The rotor assembly according to any one of claims 1 to 7, characterized in that: The support frame is an integral injection-molded part, and the rotating shaft and the magnetic ring are fixedly connected to the support frame through injection molding of the support frame.

9. An outer rotor motor, characterized in that: include: A stator assembly, the stator assembly comprising a stator, the stator having a central hole; A rotor assembly, wherein the rotor assembly is a rotor assembly according to any one of claims 1 to 8, wherein the magnetic ring is rotatably covered on the outside of the stator, the rotating shaft is passed through the center hole, and the rotating shaft and the stator are rotatably matched through a bearing that is matched in the center hole and sleeved on the outside of the rotating shaft.

10. A fan component, characterized in that: It comprises a crossflow wind wheel and an outer rotor motor according to claim 9, wherein the outer rotor motor is connected to one axial end of the crossflow wind wheel.

11. An air conditioner, characterized in that: Comprising the fan component according to claim 10.

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