An outer rotor motor and industrial equipment

Abstract

This application relates to the field of motor technology, disclosing an external rotor motor and industrial equipment. The external rotor motor includes a stator assembly, a rotor assembly, a heat dissipation assembly, and a rear cover. The stator assembly is provided with bearings, and the rotor assembly is connected to the stator assembly through the bearings. The rotor assembly includes a rotor shaft, a rotor support, a magnetic plate assembly, and a housing. The rotor shaft is connected to the rotor support, the magnetic plate assembly is disposed on the rotor support, the housing is sleeved on the rotor support, the heat dissipation assembly is disposed on the rotor assembly, and the heat dissipation assembly is at least partially disposed in the gaps of the magnetic plate assembly. The rear cover is connected to the rotor assembly. Through the above method, this application embodiment can establish a direct heat transfer channel from the heat source to the heat dissipation end, effectively solving the problem of long heat transfer paths in the prior art.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to an external rotor motor and industrial equipment. Background Technology

[0002] External rotor motors, as an important type of motor, are widely used in various industrial equipment. The structural characteristic of the external rotor being located outside the stator makes heat dissipation design a key factor affecting the performance of external rotor motors. Existing external rotor motor cooling systems employ a single forced convection heat transfer method, primarily relying on the centrifugal force generated by the rotation of the external rotor fan to create a negative pressure within the motor, drawing in cool air from the bottom of the motor and removing internal heat through airflow. The efficiency of this cooling method is directly limited by the motor speed and the local structural design parameters of the external rotor fan, including the number of fan blades, blade height, outlet outer diameter, shape, and size.

[0003] In the implementation of this application, the inventors discovered that the heat generated during the operation of the external rotor motor, such as iron loss, copper loss, and eddy current loss of the magnetic sheet, needs to be gradually transferred to the surface through the natural heat conduction of the internal structure of the motor, and then dissipated by air convection. The entire heat transfer process has obvious thermal resistance bottlenecks, which makes the heat transfer path of the current heat dissipation method single and the efficiency limited. Utility Model Content

[0004] The main technical problem solved by the embodiments of this application is to provide an external rotor motor. By setting a heat dissipation component and installing the heat dissipation component at least partially in the gap of the magnetic plate component, a direct heat transfer channel from the heat source to the heat dissipation end is established, which effectively solves the problem of the long heat transfer path in the prior art, improves the heat dissipation efficiency, and the direct contact setting between the heat dissipation component and the magnetic plate component realizes the rapid heat dissipation and reduces the thermal resistance loss in the heat transfer process.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application embodiment is: providing an external rotor motor, including a stator assembly, a rotor assembly, a heat dissipation assembly, and a rear cover. The stator assembly is provided with a bearing, and the rotor assembly is connected to the stator assembly through the bearing. The rotor assembly includes a rotor shaft, a rotor support, a magnetic plate assembly, and a housing. The rotor shaft is connected to the rotor support, the magnetic plate assembly is disposed on the rotor support, the housing is sleeved on the rotor support, the heat dissipation assembly is disposed on the rotor assembly, and the heat dissipation assembly is at least partially disposed in the gap of the magnetic plate assembly. The rear cover is connected to the rotor assembly.

[0006] Optionally, the magnetic sheet assembly includes a plurality of magnetic sheets spaced apart along the circumferential direction of the rotor support, and the heat dissipation assembly includes a plurality of heat pipes disposed in the gap between adjacent magnetic sheets.

[0007] Optionally, the heat pipe includes a first tube body and a second tube body, the first tube body and the second tube body are connected, and the first tube body is sandwiched in the gap between adjacent magnetic sheets.

[0008] Optionally, the heat pipe further includes a connecting portion, which connects the first pipe body and the second pipe body respectively, and the second pipe body is connected to the connecting portion to form an arc-shaped transition portion.

[0009] Optionally, the heat pipe has an "L" shaped structure.

[0010] Optionally, the rotor support is further provided with a mounting assembly for fixing the heat dissipation assembly and the magnetic plate assembly.

[0011] Optionally, the mounting assembly includes multiple mounting portions and multiple positioning portions, with one mounting portion and one positioning portion being spaced apart along the circumferential direction of the rotor support. One mounting portion is used to mount one of the heat pipes, and one positioning portion is used to position one of the magnetic sheets.

[0012] Optionally, the mounting part and the positioning part are provided with mounting grooves, and one end of the heat pipe is disposed in the mounting groove.

[0013] Optionally, the stator assembly further includes an iron core, a winding assembly, and a stator, wherein the winding assembly is disposed on the iron core, the iron core is disposed on the stator, the bearing is disposed between the stator and the rotor shaft, and the rear cover cooperates with the stator assembly to seal the rotor assembly.

[0014] To solve the above-mentioned technical problems, another technical solution adopted in the embodiments of this application is to provide an industrial device, including the external rotor motor described in any of the above-mentioned claims.

[0015] This application provides an external rotor motor, including a stator assembly, a rotor assembly, a heat dissipation assembly, and a rear cover. The stator assembly is provided with a bearing, and the rotor assembly is connected to the stator assembly through the bearing. The rotor assembly includes a rotor shaft, a rotor support, a magnetic plate assembly, and a housing. The rotor shaft is connected to the rotor support, the magnetic plate assembly is disposed on the rotor support, and the housing is fitted onto the rotor support. The heat dissipation assembly is disposed on the rotor assembly, and at least partially disposed in the gaps of the magnetic plate assembly. The rear cover is connected to the rotor assembly. By setting the heat dissipation assembly in the rotor assembly and at least partially installing the heat dissipation assembly in the gaps of the magnetic plate assembly, a direct heat transfer channel from the heat source to the heat dissipation end is established, effectively solving the problem of long heat transfer paths in the prior art, improving heat dissipation efficiency, and the direct contact between the heat dissipation assembly and the magnetic plate assembly enables rapid heat dissipation, reducing thermal resistance loss during heat transfer. At the same time, this application achieves improved heat dissipation performance while maintaining the original external dimensions of the motor. The heat dissipation assembly cleverly utilizes the space between the magnetic plates, avoiding the problem of increasing the overall size of the motor, demonstrating the engineering advantages of compact design. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of an external rotor motor according to an embodiment of this application;

[0018] Figure 2 This is an exploded view of the external rotor motor according to an embodiment of this application;

[0019] Figure 3 This is an exploded view of the external rotor motor from another perspective in an embodiment of this application;

[0020] Figure 4 This is another schematic diagram of the rotor assembly according to an embodiment of this application;

[0021] Figure 5 yes Figure 4 Enlarged view of part A in the middle;

[0022] Figure 6 This is a schematic diagram of the heat pipe structure according to an embodiment of this application;

[0023] Figure 7 This is an exploded view of the rotor assembly according to an embodiment of this application.

[0024] The reference numerals in the detailed embodiments are as follows: 100, external rotor motor; 10, stator assembly; 11, bearing; 12, iron core; 13, winding assembly; 14, stator; 20, rotor assembly; 21, rotor shaft; 22, rotor support; 23, magnetic plate assembly; 231, magnetic plate; 24, housing; 25, mounting assembly; 251, mounting part; 252, positioning part; 253, mounting groove; 30, heat dissipation assembly; 31, heat pipe; 311, first tube body; 312, second tube body; 313, connecting part; 40, rear cover. Detailed Implementation

[0025] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "vertical," "horizontal," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0027] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0028] Please see Figure 1 and Figure 2The external rotor motor 100 includes a stator assembly 10, a rotor assembly 20, a heat dissipation assembly 30, and a rear cover 40. The stator assembly 10 is equipped with a bearing 11, which provides support and guidance for the rotational movement of the rotor assembly 20. The rotor assembly 20 is connected to the stator assembly 10 via the bearing 11, forming the basic motion mechanism of the motor. The rotor assembly 20 includes a rotor shaft 21, a rotor support 22, a magnetic plate assembly 23, and a housing 24. The rotor shaft 21 is connected and fixed to the rotor support 22, forming the main frame of the rotor. The magnetic plate assembly 23 is disposed on the rotor support 22, forming the magnetic circuit system of the motor. The housing 24 is fitted around the rotor support 22, providing protection and support for the entire rotor assembly 20. The heat dissipation component 30 is disposed inside the rotor assembly 20, ensuring that it is at least partially located within the gaps of the magnetic plate assemblies 23. This arrangement allows the heat dissipation component 30 to directly contact or approach the main heat source, significantly shortening the heat conduction path and improving heat dissipation efficiency. The heat dissipation component 30 fully utilizes the natural gap space between the magnetic plate assemblies 23, achieving effective integration of heat dissipation functions without increasing the overall size of the motor. This design concept reflects the engineering requirements of optimized space utilization and structural compactness. The rear cover 40, as a closed component of the motor, establishes a connection with the rotor assembly 20, completing the structural enclosure of the entire external rotor motor 100. This not only ensures the integrity of the internal structure of the motor but also provides necessary protection for the working environment of the heat dissipation component 30. Through the above structural arrangement, this embodiment realizes the transformation from traditional single convection heat dissipation to a composite heat dissipation mode. The design of the heat dissipation component 30 located within the gaps of the magnetic plate assemblies 23 establishes a direct heat transfer channel from the heat source to the heat dissipation end, effectively solving the technical problem of long heat transfer paths in the prior art.

[0029] Please see Figure 3The magnetic plate assembly 23 includes multiple magnetic plates 231 spaced apart along the circumference of the rotor support 22. These magnetic plates 231 are evenly distributed around the circumference of the rotor support 22 at a predetermined angular spacing, forming a regular magnetic pole arrangement. The number of magnetic plates 231 is determined based on the motor power rating and magnetic circuit design requirements, and is typically an even number to ensure the symmetry and balance of the magnetic circuit. Each magnetic plate 231 occupies a specific arc length range in the circumferential direction of the rotor support 22, and a designed gap distance is maintained between magnetic plates 231. The width of the gap must meet the magnetic circuit performance requirements while providing sufficient space for the installation of the heat dissipation assembly 30. The circumferential positioning of the magnetic plates 231 is achieved through a positioning structure on the rotor support 22, ensuring the positional stability of the magnetic plates 231 under high-speed rotation. The heat dissipation assembly 30 includes multiple heat pipes 31, which are positioned in the gaps between adjacent magnetic plates 231. The number of heat pipes 31 corresponds to the number of magnetic plates 231, forming a one-to-one or appropriately proportioned configuration. Each heat pipe 31, as an independent heat transfer unit, possesses complete phase change heat transfer functionality. The coordinated operation of multiple heat pipes 31 effectively covers the entire circumferential heat source of the rotor assembly 20, avoiding the generation of heat dissipation dead zones. The spatial arrangement of the heat pipes 31 in the rotor assembly 20 follows a correspondence with the gaps between the magnetic plates 231. Each heat pipe 31 is positioned within the gap space formed between adjacent magnetic plates 231, achieving direct thermal contact between the heat pipe 31 and the surface of the magnetic plate 231.

[0030] Furthermore, the heat pipe 31 is positioned in the gap between adjacent magnetic plates 231, forming a close heat conduction contact. A direct heat conduction channel is established between the outer surface of the heat pipe 31 and the side surface of the magnetic plate 231, allowing the eddy current loss heat generated by the magnetic plate 231 during motor operation to be rapidly transferred to the interior of the heat pipe 31. The geometry of the gap provides a stable mounting position for the heat pipe 31, while ensuring its position remains fixed during motor rotation.

[0031] In this embodiment, the external rotor motor 100 achieves a significant improvement in heat dissipation performance through the cooperation of the magnetic sheet assembly 23 and the heat pipe 31 heat dissipation assembly 30. The high thermal conductivity of the heat pipe 31, combined with the space utilization of the gap between the magnetic sheet 231, establishes an efficient heat transfer path from the heat source of the magnetic sheet 231 to the external heat dissipation environment. The distributed configuration of multiple heat pipes 31 ensures the even distribution of heat dissipation load and avoids the performance degradation problem caused by local heat concentration.

[0032] For further details, please refer to Figure 4 , Figure 5 , Figure 6The heat pipe 31 includes a first tube body 311, a second tube body 312, and a connecting portion 313. The connecting portion 313 connects the first tube body 311 and the second tube body 312, and the second tube body 312 is connected to the connecting portion 313 to form an arc-shaped transition portion. The first tube body 311 is sandwiched in the gap between adjacent magnetic sheets 231. The first tube body 311 is used to directly contact the surface of the magnetic sheet 231 and undertakes the functions of heat absorption and initial conduction. The second tube body 312 is responsible for further heat transfer and final heat dissipation. The two tube bodies form a complete heat conduction channel through the connecting portion 313. The first tube body 311 is installed by clamping and is embedded in the gap space between adjacent magnetic sheets 231 to ensure that the first tube body 311 and the surface of the magnetic sheet 231 form a stable physical contact and maximize the heat conduction contact area. The clamping installation method provides reliable mechanical fixation, preventing the first tube 311 from shifting or loosening during the high-speed rotation of the motor. In the clamped state, the first tube 311 and the magnetic sheet 231 form a heat conduction assembly, realizing the efficient transfer of heat from the magnetic sheet 231 to the heat pipe 31.

[0033] The connection between the second tube 312 and the connecting part 313 forms an arc-shaped transition section. This arc-shaped design effectively eliminates sharp corners and stress concentration at the connection point. The heat pipe 31 is a hollow structure containing a phase change working fluid. The first tube 311, acting as the evaporation section, directly receives heat conducted by the magnetic plate 231. After absorbing heat and vaporizing, the internal working fluid flows through the connecting part 313 to the second tube 312. The connecting part 313 ensures unobstructed vapor flow between the evaporation and condensation sections, while the arc-shaped transition section optimizes flow characteristics and reduces pressure loss. The second tube 312, acting as the condensation section, releases heat and re-liquefies the working fluid in this area. Under the combined action of gravity and centrifugal force generated by the motor rotation, the liquefied working fluid flows back to the first tube 311 through the connecting part 313, completing a full phase change heat transfer cycle. The clear division of labor in the dual-tube structure improves the heat transfer efficiency of the heat pipe 31, and the optimized design of the connecting part 313 and the arc-shaped transition section ensures the stability and continuity of the working fluid cycle.

[0034] In this embodiment, the heat pipe 31 has an "L"-shaped structure, and the connecting part 313 is manufactured using an integrated molding process to eliminate connection gaps and potential leakage risks. The L-shaped heat pipe 31 is installed using a radial insertion method. The positioning depth of the first pipe in the gap ensures sufficient contact area between the heat pipe 31 and the magnetic plate 231, while avoiding any impact on the normal function of the magnetic plate 231. Furthermore, the surface of the first pipe and the side of the magnetic plate 231 form a surface contact thermal conduction relationship, maximizing heat transfer efficiency.

[0035] Please refer to the following: Figure 2 And see Figure 7The rotor support 22 is further provided with a mounting assembly 25, which is used to fix the heat dissipation assembly 30 and the magnetic plate assembly 23, achieving accurate positioning and reliable fixation of the heat pipe 31 and the magnetic plate 231. Specifically, the mounting assembly 25 includes multiple mounting parts 251 and multiple positioning parts 252. One mounting part 251 and one positioning part 252 are spaced apart along the circumferential direction of the rotor support 22. One mounting part 251 is used to mount one heat pipe 31, ensuring the precise position and stable installation of the magnetic plate 231 on the rotor support 22. One positioning part 252 is used to position one magnetic plate 231. The mounting parts 251 are distributed at predetermined intervals along the circumferential direction of the rotor support 22, and the distribution interval precisely corresponds to the position of the gap between the magnetic plates 231. The spatial arrangement of the mounting section 251 ensures that the heat pipe 31 can be accurately embedded into the gap of the magnetic plate 231 after installation, achieving effective heat conduction contact between the heat pipe 31 and the magnetic plate 231. The positioning section 252 and the mounting section 251 are alternately distributed in the circumferential direction of the rotor support 22, forming a regular interval layout. The positioning section 252 ensures that the gap size between the magnetic plate 231 and the heat pipe 31 is formed as required by the design, which satisfies the heat dissipation requirements and ensures the magnetic circuit performance. The positioning section 252 provides dual constraints on the magnetic plate 231 in the radial and axial directions to prevent the magnetic plate 231 from shifting during motor operation. Furthermore, in the external rotor motor 100, the positional accuracy of the magnetic plate 231 directly affects the electromagnetic performance and operational stability of the motor. The positioning section 252 ensures that each magnetic plate 231 can be accurately installed in the preset position, avoiding performance degradation due to installation errors. The rotor bracket 22 is provided with both a mounting part 251 for fixing the heat pipe 31 and a positioning part 252 for positioning the magnetic plate 231. This dual-function structural layout reflects the optimized consideration of space utilization. The reasonable spacing between the two structures ensures that the installation of the magnetic plate 231 and the heat pipe 31 do not interfere with each other, while maximizing the functional integration of the rotor bracket 22.

[0036] Furthermore, the mounting part 251 and the positioning part 252 are provided with mounting grooves 253, and one end of the heat pipe 31 is disposed in the mounting groove 253. Specifically, the second pipe is disposed in the mounting groove 253. In this embodiment, the second pipe of the heat pipe 31 adopts a flat plate design, and the flat plate structure simultaneously undertakes the dual functions of heat dissipation and air drive. The flat plate of the second pipe is designed as a component of the motor rotor fan blades, forming an integrated configuration with the traditional fan blade structure. The flat plate fan blades of the second pipe generate an enhanced air drive effect during motor rotation. Increasing the number of flat plate fan blades is equivalent to increasing the effective number of fan blades of the rotor fan, thereby improving the motor's air drive capability. The enhanced air drive force promotes the acceleration of airflow inside the motor, increasing the total amount of air flowing through the motor. The increase in the total amount of air directly improves the convective heat transfer conditions inside the motor, accelerating the transfer of heat from the inside of the motor to the external environment. The enhanced airflow also increases the convective heat transfer coefficient of the flat plate surface of the second pipe, further enhancing the heat dissipation effect of the heat pipe 31. The dual increase in air drive force and heat dissipation area forms a synergistic effect, achieving a multiplier effect in heat dissipation performance. Through the above configuration, the coupled enhanced heat dissipation method organically combines phase change heat transfer and forced convection heat dissipation through heat pipe 31. Heat pipe 31 undertakes the function of rapid heat transfer from the heat source to the heat dissipation surface, while the second pipe is configured as a flat fan blade structure to efficiently dissipate heat to the environment. The coupling effect of the two heat dissipation mechanisms overcomes the limitations of traditional single heat dissipation methods, achieving a significant improvement in heat dissipation performance.

[0037] The efficient heat absorption of the first pipe of heat pipe 31 and the enhanced heat dissipation of the flat blades of the second pipe form a complete heat transfer chain. The first pipe ensures the rapid removal of heat from the heat source, avoiding localized overheating. The flat blades of the second pipe ensure the rapid dissipation of the removed heat, maintaining the operating temperature difference and heat transfer driving force of heat pipe 31. The coordinated operation of the coupled system achieves optimized matching of each link in the heat transfer process.

[0038] Please reconsider. Figure 1The stator assembly 10 further includes an iron core 12, a winding assembly 13, and a stator 14. The winding assembly 13 is disposed on the iron core 12, and the iron core 12 is disposed on the stator 14. The bearing 11 is disposed between the stator 14 and the rotor shaft 21. The rear cover 40 cooperates with the stator assembly 10 to seal the rotor assembly 20. The iron core 12, as the main carrier of the magnetic circuit, undertakes the functions of magnetic flux conduction and magnetic field regulation. The winding assembly 13 plays a key role in the conversion of electrical energy into magnetic energy, generating a rotating magnetic field through current excitation. The stator 14, as the structural foundation of the entire stator assembly 10, provides mechanical support and spatial positioning functions. The stator assembly 10 and the rotor assembly 20 form a complete motor structure through the bearing 11 system. The rear cover 40 sealing system ensures the sealing and reliability of the motor. The iron core 12 and the winding assembly 13 of the stator assembly 10 generate a rotating magnetic field, driving the rotor assembly 20 to rotate. The heat pipe 31 heat dissipation system inside the rotor assembly 20 effectively manages the heat generated during motor operation.

[0039] This application provides an external rotor motor 100, including a stator assembly 10, a rotor assembly 20, a heat dissipation assembly 30, and a rear cover 40. The stator assembly 10 is provided with a bearing 11, and the rotor assembly 20 is connected to the stator assembly 10 through the bearing 11. The rotor assembly 20 includes a rotor shaft 21, a rotor support 22, a magnetic plate assembly 23, and a housing 24. The rotor shaft 21 is connected to the rotor support 22, the magnetic plate assembly 23 is disposed on the rotor support 22, the housing 24 is sleeved on the rotor support 22, and the heat dissipation assembly 30 is disposed on the rotor assembly 20, and the heat dissipation assembly 30 is at least partially disposed in the gap of the magnetic plate assembly 23. The rear cover 40 is connected to the rotor assembly 20. By setting a heat dissipation component 30 in the rotor assembly 20 and installing the heat dissipation component 30 at least partially in the gap of the magnetic plate assembly 23, a direct heat transfer channel from the heat source to the heat dissipation end is established, which effectively solves the problem of the long heat transfer path in the prior art and improves the heat dissipation efficiency. Furthermore, the direct contact between the heat dissipation component 30 and the magnetic plate assembly 23 enables rapid heat dissipation and reduces thermal resistance loss during the heat transfer process. At the same time, this application achieves improved heat dissipation performance while maintaining the original appearance size of the motor. The heat dissipation component 30 cleverly utilizes the space between the magnetic plates, avoiding the problem of increasing the overall size of the motor and demonstrating the engineering advantages of compact design.

[0040] This application also provides an embodiment of industrial equipment (not shown in the figure), which includes the external rotor motor 100 described above. For the specific structure and function of the industrial equipment, please refer to the above embodiment, which will not be repeated here.

[0041] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An external rotor electric machine characterized by, The outer rotor motor comprises: a stator assembly provided with a bearing; a rotor assembly connected with the stator assembly through the bearing, the rotor assembly comprising a rotor shaft, a rotor support, a magnetic sheet assembly and a housing, the rotor shaft being connected with the rotor support, the magnetic sheet assembly being arranged on the rotor support, and the housing being arranged on the rotor support; a heat dissipation assembly arranged on the rotor assembly and at least partially arranged in a gap of the magnetic sheet assembly; a back cover connected with the rotor assembly.

2. The outer rotor motor according to claim 1, wherein: the magnetic sheet assembly comprises a plurality of magnetic sheets arranged at intervals along the circumferential direction of the rotor support, and the heat dissipation assembly comprises a plurality of heat pipes arranged in the gaps between adjacent magnetic sheets.

3. The outer rotor motor according to claim 2, wherein: the heat pipe comprises a first pipe body and a second pipe body, the first pipe body and the second pipe body are connected, and the first pipe body is clamped in the gap between adjacent magnetic sheets.

4. The outer rotor motor according to claim 3, wherein: the heat pipe further comprises a connecting portion, the connecting portion is connected with the first pipe body and the second pipe body respectively, and the second pipe body is connected with the connecting portion to form an arc-shaped transition portion.

5. The outer rotor motor according to claim 2, wherein: the heat pipe has an "L" shaped structure.

6. The outer rotor motor according to claim 2, wherein: the rotor support is further provided with a mounting assembly, the mounting assembly is used for fixing the heat dissipation assembly and the magnetic sheet assembly.

7. The outer rotor motor according to claim 6, wherein: the mounting assembly comprises a plurality of mounting portions and a plurality of positioning portions, one mounting portion and one positioning portion are arranged at intervals along the circumferential direction of the rotor support, one mounting portion is used for mounting one heat pipe, and one positioning portion is used for positioning one magnetic sheet.

8. The outer rotor motor according to claim 7, wherein: the mounting portion and the positioning portion are provided with a mounting groove, and one end of the heat pipe is arranged in the mounting groove.

9. The outer rotor motor according to claim 1, wherein: the stator assembly further comprises an iron core, a winding assembly and a stator, the winding assembly is arranged on the iron core, the iron core is arranged on the stator, the bearing is arranged between the stator and the rotor shaft, and the back cover cooperates with the stator assembly to close the rotor assembly.

10. An industrial plant, characterized in that, The outer rotor motor according to any one of claims 1-9.

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