Outer rotor motor, fan component and air conditioner

Abstract

The utility model discloses an external rotor motor, a fan component and an air conditioner, the external rotor motor comprises a stator assembly and a rotor assembly, the stator assembly comprises a stator, and the stator is provided with a central hole; the rotor assembly comprises an end cover part, an annular part, a rotating shaft and a wind wheel, the end cover part is arranged at one axial end of the stator, the annular part is connected with the end cover part and surrounds the circumferential side of the stator, the rotating shaft is connected with the end cover part and penetrates through the center hole, the wind wheel is connected with at least one of the end cover part, the annular part and the rotating shaft, and the air inlet end or the air outlet end of the wind wheel faces the stator; wherein the outer rotor motor is internally provided with a cooling air duct, and the cooling air duct is communicated with the air inlet end and / or the air outlet end of the air wheel. According to the external rotor motor provided by the embodiment of the utility model, the wind wheel can rotate along with the rotor assembly so as to drive the air flow in the cooling air channel to flow, heat generated when the external rotor motor works can be continuously taken away, and the power density and the performance of the external rotor motor can be improved.

Description

Technical Field

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

[0002] In related technologies, outer rotor motors generally dissipate heat through natural convection of air. Under some harsh heat dissipation conditions, key components such as bearings and stator windings may be in a high temperature state, which may affect the performance of the outer rotor motor. However, in some technologies, the structural design of the outer rotor motor is not reasonable enough and cannot meet the use requirements well. 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 an outer rotor motor, a fan component and an air conditioner, wherein the fan wheel can rotate with the rotor assembly to form an air pressure difference between the rotor assembly and the stator assembly, so as to drive the air flow in the cooling air duct, and can continuously take away the heat generated by the outer rotor motor during operation, so that the operating temperature of the outer rotor motor is maintained within a reasonable range, which is conducive to improving the power density and performance of the outer rotor motor.

[0004] In a first aspect, an embodiment of the present application provides an outer rotor motor, comprising: a stator assembly, the stator assembly comprising a stator, the stator having a center hole; a rotor assembly, the rotor assembly comprising an end cover portion, an annular portion, a rotating shaft and a wind wheel, the end cover portion being arranged at one axial end of the stator, the annular portion being connected to the end cover portion and surrounding the circumference of the stator, the rotating shaft being connected to the end cover portion and passing through the center hole, the wind wheel being connected to at least one of the end cover portion, the annular portion and the rotating shaft, the air inlet end or the air outlet end of the wind wheel being arranged toward the stator; wherein a cooling air duct is arranged inside the outer rotor motor, and the cooling air duct is connected to the air inlet end and / or the air outlet end of the wind wheel.

[0005] In the above technical solution, by setting a wind wheel to connect at least one of the end cover part, the annular part and the rotating shaft, the air inlet end or the air outlet end of the wind wheel is set toward the stator, and the outer rotor motor is provided with a cooling air duct, and the cooling air duct is connected to the air inlet end and / or the air outlet end of the wind wheel. Therefore, the wind wheel and the cooling air duct of the outer rotor motor are arranged in various ways, and the outer rotor motor has a variety of structures, which is conducive to improving the applicability of the outer rotor motor. Secondly, the wind wheel can rotate with the rotor assembly to form an air pressure difference between the rotor assembly and the stator assembly to drive the air flow in the cooling air duct, that is, it can drive the air circulation inside the outer rotor motor and the external environment, so that the airflow circulating in the cooling air duct can continuously take away the heat generated by the outer rotor motor during operation, so that the operating temperature of the outer rotor motor is maintained within a reasonable range, which is conducive to improving the power density and performance of the outer rotor motor.

[0006] In some embodiments of the present application, a mounting hole is provided on the annular portion, the mounting hole is through-going at least on one side facing the stator, and the wind wheel is arranged in the mounting hole; an end gap is provided between the stator and the end cover portion, and the cooling air duct is arranged on the stator assembly and connected to the end gap.

[0007] In some embodiments of the present application, one end of the cooling air duct facing the end cover portion is an air duct opening, the minimum distance between the inner wall of the air duct opening and the axis of the rotating shaft is a first distance L1, and the maximum distance between the inner wall of the air duct opening and the axis of the rotating shaft is a second distance L2; the outer diameter of the wind wheel is less than or equal to the first distance L1, or the inner diameter of the wind wheel is greater than or equal to the second distance L2.

[0008] In some embodiments of the present application, the mounting hole is axially penetrated on the annular portion, and the air inlet end of the wind wheel is arranged toward the stator.

[0009] In some embodiments of the present application, the stator includes a bearing seat and a bearing arranged in the bearing seat, the center of the bearing seat forms the center hole, the rotating shaft passes through the bearing seat, the bearing is located in the center hole and is sleeved on the rotating shaft, and the cooling air duct is formed on the bearing seat.

[0010] In some embodiments of the present application, there are at least two cooling air ducts, which are spaced apart and distributed around the central hole.

[0011] In some embodiments of the present application, there are at least two cooling air ducts, and the interval between two adjacent cooling air ducts is at least 2 mm; the minimum distance between the inner surface of the cooling air duct and the inner surface of the center hole is L1, L1 is greater than or equal to 2 mm, and the minimum distance between the inner surface of the cooling air duct and the outer surface of the bearing seat is L2, L2 is greater than or equal to 2 mm.

[0012] In some embodiments of the present application, the bearing seat is a heat conductor.

[0013] In some embodiments of the present application, the annular portion is an injection-molded part, and the wind wheel is fixedly connected to the annular portion by injection molding of the annular portion.

[0014] In a second aspect, an embodiment of the present application provides a wind turbine component, including a crossflow impeller and an outer rotor motor according to the embodiment of the first aspect, wherein the outer rotor motor is connected to one axial end of the crossflow impeller.

[0015] In the above technical solution, by adopting the above outer rotor motor, the working stability of the fan components can be improved.

[0016] In a third aspect, an embodiment of the present application provides an air conditioner, comprising a fan component according to the embodiment of the second aspect above.

[0017] In the above technical solution, the performance of the air conditioner can be improved by adopting the above fan component.

[0018] 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

[0019] 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:

[0020] Figure 1 is a schematic diagram of an outer rotor motor provided in some embodiments of the present application;

[0021] Figure 2 yes Figure 1 An exploded view of an outer rotor motor shown in;

[0022] Figure 3 yes Figure 1 Another exploded view of the outer rotor motor shown in;

[0023] Figure 4 is a schematic diagram of a stator winding and a stator provided in some embodiments of the present application;

[0024] Figure 5 is a cross-sectional view of an outer rotor motor provided in some embodiments of the present application;

[0025] Figure 6 It is a partial cross-sectional view of an outer rotor motor provided in some embodiments of the present application.

[0026] Reference numerals:

[0027] Outer rotor motor 100, end gap 10,

[0028] Stator assembly 1, stator 11, bearing seat 111, center hole 1111, groove 1112, cooling air duct 1113, air duct opening 1114, bearing 112, stator body 113, coil slot 1131, installation cavity 1132, stator winding 12,

[0029] Rotor assembly 2, end cover portion 21, annular portion 22, magnetic ring 221, injection molding portion 222, mounting hole 223, rotating shaft 23, wind wheel 24,

[0030] Support seat 3, retaining ring 4, screw column 5. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] Hereinafter, an outer rotor motor 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0035] like Figure 1 , Figure 3 and Figure 5 As shown, the outer rotor motor 100 according to the embodiment of the utility model includes a stator assembly 1, the stator assembly 1 includes a stator 11, and the stator 11 has a center hole 1111; a rotor assembly 2, the rotor assembly 2 includes an end cover portion 21, an annular portion 22, a rotating shaft 23 and a wind wheel 24, the end cover portion 21 is arranged at one axial end of the stator 11, the annular portion 22 is connected to the end cover portion 21, and the annular portion 22 surrounds the circumference of the stator 11, the rotating shaft 23 is connected to the end cover portion 21, and the rotating shaft 23 is passed through the center hole 1111, the wind wheel 24 is connected to at least one of the end cover portion 21, the annular portion 22 and the rotating shaft 23, and the air inlet end or the air outlet end of the wind wheel 24 is arranged toward the stator 11; wherein, a cooling air duct 1113 is arranged inside the outer rotor motor 100, and the cooling air duct 1113 is connected to the air inlet end and / or the air outlet end of the wind wheel 24.

[0036] Therefore, by setting a wind wheel 24 to connect at least one of the end cover part 21, the annular part 22 and the rotating shaft 23, the air inlet end or the air outlet end of the wind wheel 24 is set toward the stator 11, and the outer rotor motor 100 is provided with a cooling air duct 1113, and the cooling air duct 1113 is connected to the air inlet end and / or the air outlet end of the wind wheel 24, then the wind wheel 24 can rotate with the rotor assembly 2 to form an air pressure difference between the rotor assembly 2 and the stator assembly 1, so as to drive the air flow in the cooling air duct 1113, that is, it can drive the air circulation inside the outer rotor motor 100 and the external environment, so that the airflow circulating in the cooling air duct 1113 can continuously take away the heat generated by the outer rotor motor 100 during operation, so that the operating temperature of the outer rotor motor 100 is maintained within a reasonable range, which is beneficial to improving the power density and performance of the outer rotor motor 100.

[0037] It should be noted that the wind wheel 24 is connected to at least one of the end cover part 21, the annular part 22 and the rotating shaft 23, and the wind wheel 24 can be connected to one of the end cover part 21, the annular part 22 and the rotating shaft 23, or two of them are connected, or all three are connected; the cooling air duct 1113 is connected to the air inlet end and / or the air outlet end of the wind wheel 24, and the cooling air duct 1113 can be connected to the air inlet end of the wind wheel 24, or the air inlet end of the wind wheel 24, or both the air inlet end and the air outlet end of the wind wheel 24 are connected.

[0038] Optionally, the wind wheel 24 is arranged on at least one of the end cover 21, the annular portion 22 and the rotating shaft 23, and the wind wheel 24 is located outside the rotor assembly 2, on the rotor assembly 2, or inside the rotor assembly 2. For example, the wind wheel 24 is arranged on the outside of the end cover 21 and connected to the end cover 21, and the cooling air duct 1113 is connected to the air inlet end or the air outlet end of the wind wheel 24; or, the wind wheel 24 is arranged on the end cover 21, such as the end cover 21 is formed with a mounting groove, the wind wheel 24 is arranged in the mounting groove, and the cooling air duct 1113 is connected to the air inlet end or the air outlet end of the wind wheel 24; or, the wind wheel 24 is arranged in the end cover 21 and connected to the end cover 21, such as the wind wheel 24 is arranged between the end cover 21 and the stator 11, that is, the wind wheel 24 is arranged in the cooling air duct 1113, and the cooling air duct 1113 is connected to the air inlet end and the air outlet end of the wind wheel 24.

[0039] For example, in combination Figure 5, the wind wheel 24 is arranged between the annular portion 22 and the end cover portion 21, and the opposite sides of the wind wheel 24 are respectively connected to the annular portion 22 and the end cover portion 21, and the air inlet end of the wind wheel 24 is connected to the cooling air duct 1113. The outer rotor motor 100 includes a stator assembly 1 and a rotor assembly 2. The stator assembly 1 includes a stator 11. The stator 11 is constructed as a cylindrical structure, and the stator 11 is provided with a center hole 1111 extending axially therethrough. The rotor assembly 2 includes an end cover portion 21, an annular portion 22, a rotating shaft 23 and a wind wheel 24. The end cover portion 21 is provided at one axial end of the stator 11. The annular portion 22 is constructed as a cylindrical structure, and the annular portion 22 surrounds the outer circumference of the stator 11. The annular portion 22 is connected to the edge of the end cover portion 21. The rotating shaft 23 is connected to the end cover portion 21. One end of the rotating shaft 23 protrudes from the end cover portion 21 in a direction away from the stator 11 and is passed through the center hole 1111. The wind wheel 24 is connected to the end cover portion 21, and the air inlet end of the wind wheel 24 is arranged toward the stator 11, and the air outlet end of the wind wheel 24 is arranged toward the direction away from the stator 11, that is, the air outlet end of the wind wheel 24 is connected to the external environment.

[0040] Among them, a cooling air duct 1113 is provided in the outer rotor motor 100, and one end of the cooling air duct 1113 away from the end cover portion 21 penetrates the stator assembly 1 along the axial direction of the stator 11, that is, the end of the cooling air duct 1113 away from the end cover portion 21 is connected to the external environment, and the end of the cooling air duct 1113 close to the end cover portion 21 is connected to the air inlet end of the wind wheel 24. When the outer rotor motor 100 is working, the rotor assembly 2 rotates to synchronously drive the wind wheel 24 to rotate, and the wind wheel 24 rotates to form an air pressure difference between the air inlet end and the air outlet end, that is, the air pressure at the air inlet end is lower than the air pressure at the air outlet end, so that the air flow of the cooling air duct 1113 flows toward the air inlet end, so that the gas of the external environment is sucked into the cooling air duct 1113 and flows toward the air inlet end, and the wind wheel 24 rotates to blow the gas sucked in by the air inlet end from the air outlet end to the external environment, for example, in combination Figure 5 , the gas from the external environment is sucked into the cooling air duct 1113 from the lower side of the outer rotor motor 100 and flows to the air inlet end, and then the wind wheel 24 blows the airflow out from the air outlet end to the upper side of the outer rotor motor 100. Therefore, as the wind wheel 24 rotates to realize the circulation of the airflow in the outer rotor motor 100 along the cooling air duct 1113, the airflow exchanges heat with the outer rotor motor 100 to continuously take away the temperature generated by the operation of the outer rotor motor 100, so that the operating temperature of the outer rotor motor 100 is maintained within a reasonable range, which is conducive to improving the power density and performance of the outer rotor motor 100.

[0041] In addition, the power for the rotation of the wind wheel 24 comes from the rotor assembly 2, that is, the wind wheel 24 can rotate with the rotation of the rotor assembly 2, effectively utilizing the characteristics of the outer rotor motor 100 and avoiding the need to design a corresponding drive structure separately for the wind wheel 24, so that the design of the wind wheel 24 and the rotor assembly 2 is more clever, which can simplify the structure of the outer rotor motor 100, and is conducive to improving the performance of the outer rotor motor 100 and achieving the miniaturization and lightweight effect of the outer rotor motor 100.

[0042] Optionally, the cooling air duct 1113 may be a rotation gap between the stator assembly 1 and the rotor assembly 2, or a rotation gap between the stator 11 and the rotating shaft 23, etc.; or, the cooling air duct 1113 may be formed on the stator assembly 1, for example, the cooling air duct 1113 is formed on the stator 11. Optionally, the cooling air duct 1113 may include a plurality of air duct sections, and the plurality of air duct sections may be arranged in parallel (for example, the air outlets of the plurality of air duct sections are connected to the air inlet end or the air outlet end of the fan, and the air inlet ends of the plurality of air duct sections are connected to the external environment) or arranged in series (for example, the plurality of air duct sections are connected in sequence, one of the air duct sections located at the head and tail ends is connected to the air inlet end or the air outlet end of the fan, and the other is connected to the external environment), one of the plurality of air duct sections may be a rotation gap between the stator assembly 1 and the rotor assembly 2, or a rotation gap between the stator 11 and the rotating shaft 23, etc., and / or, one of the plurality of air duct sections may be formed on the rotor assembly 2.

[0043] In the above technical solution, a wind wheel 24 is provided to connect at least one of the end cover portion 21, the annular portion 22 and the rotating shaft 23, the air inlet end or the air outlet end of the wind wheel 24 is arranged toward the stator 11, and a cooling air duct 1113 is arranged inside the outer rotor motor 100, and the cooling air duct 1113 is connected to the air inlet end and / or the air outlet end of the wind wheel 24. Therefore, the settings of the wind wheel 24 and the cooling air duct 1113 of the outer rotor motor 100 are diverse, and the outer rotor motor 100 has a variety of structures, which is beneficial to improving the applicability of the outer rotor motor 100. Secondly, the wind wheel 24 can rotate with the rotor assembly 2 to form an air pressure difference between the rotor assembly 2 and the stator assembly 1, so as to drive the air flow in the cooling duct 1113, that is, it can drive the air circulation inside the outer rotor motor 100 and the external environment, so that the airflow circulating in the cooling duct 1113 can continuously take away the heat generated by the outer rotor motor 100 during operation, so that the operating temperature of the outer rotor motor 100 is maintained within a reasonable range, which is beneficial to improving the power density and performance of the outer rotor motor 100.

[0044] In some embodiments of the present application, Figure 5A mounting hole 223 is provided on the annular portion 22, and the mounting hole 223 is through-set at least on one side facing the stator 11, and the wind wheel 24 is arranged in the mounting hole 223; an end gap 10 is provided between the stator 11 and the end cover portion 21, and a cooling air duct 1113 is arranged on the stator assembly 1 and connected to the end gap 10.

[0045] For example, the end cover 21 is located at one axial end of the stator 11, and an end gap 10 is formed between the stator 11 and the end cover 21. The annular portion 22 is connected to the end cover 21, and the annular portion 22 is arranged around the stator 11 so that the end cover 21 and the annular portion 22 are covered on the outside of the stator 11. The annular portion 22 is provided with a mounting hole 223, and the mounting hole 223 is arranged to penetrate to one side toward the stator 11. Part of the wind wheel 24 can be arranged in the mounting hole 223 to ensure reliable connection between the wind wheel 24 and the mounting hole 223. The wind wheel is located in the outer rotor motor 100, and the air inlet end of the wind wheel 24 is arranged toward the stator 11. The end cover 21 is formed with an air outlet, and the air outlet is connected to the external environment. The air outlet end of the wind wheel 24 is arranged toward the air outlet. The cooling air duct 1113 is formed on the stator assembly 1 (for example, the stator 11), and the cooling air duct 1113 is connected to the end gap 10. Therefore, when the outer rotor motor 100 is working, the wind wheel 24 rotates to drive the air flow inside the outer rotor motor 100, and the air from the external environment flows into the cooling air duct 1113 and flows to the end gap 10. Then the air flows from the end gap 10 to the air inlet end of the wind wheel 24 and flows out from the air outlet end through the air outlet to realize the circulation of the air flow inside the outer rotor motor 100, so as to continuously cool the outer rotor motor 100.

[0046] Optionally, the annular portion 22 is provided with a mounting hole 223 that penetrates the annular portion 22 axially or radially along the stator 11. For example, the annular portion 22 is formed with mounting holes 223 that penetrate the thickness of the annular portion 22 along the radial direction of the stator 11 on both sides. The wind wheel 24 is arranged in the mounting hole 223. The wind inlet end of the wind wheel 24 faces the external environment, and the wind outlet end of the wind wheel 24 faces the stator 11. The wind outlet end of the wind wheel 24 is connected to the end gap 10. One end of the cooling air duct 1113 is connected to the end gap 10, and the other end is connected to the external environment. When the wind wheel 24 rotates, the air of the external environment is sucked in from the air inlet end and blown toward the stator 11 from the air outlet end. Then the airflow flows to the end gap 10 and flows into the cooling air duct 1113, and finally flows from the cooling air duct 1113 to the external environment, so as to realize the circulation of the airflow in the outer rotor motor 100, so as to continuously cool the outer rotor motor 100.

[0047] In the above technical solution, the annular portion 22 is provided with a mounting hole 223, and the wind wheel 24 is arranged in the mounting hole 223, so that the annular portion 22 can accommodate at least a part of the wind wheel 24, which can reduce the space occupied by the wind wheel 24 in the outer rotor motor 100, and by providing an end gap 10 between the stator 11 and the end cover portion 21, and the cooling air duct 1113 is connected to the end gap 10, the wind wheel 24 can utilize the end gap 10 to connect to the cooling air duct, which can reduce the axial space occupied by the wind wheel 24 in the outer rotor motor 100, which is beneficial to control the axial length of the outer rotor motor 100 and to achieve the miniaturization of the outer rotor motor 100 in the axial direction.

[0048] In some embodiments of the present application, Figure 4 and Figure 5 The end of the cooling air duct 1113 facing the end cover portion 21 is an air duct opening 1114, the minimum distance between the inner wall of the air duct opening 1114 and the axis of the rotating shaft 23 is a first distance L1, and the maximum distance between the inner wall of the air duct opening 1114 and the axis of the rotating shaft 23 is a second distance L2; the outer diameter of the wind wheel 24 is less than or equal to the first distance L1, or the inner diameter of the wind wheel 24 is greater than or equal to the second distance L2.

[0049] For example, combined with Figure 4 and Figure 5 The wind wheel 24 is connected to the annular portion 22, and the wind wheel 24 is formed into an annular structure. An end gap 10 is provided between the end cover portion 21 and the stator 11. A cooling air duct 1113 is formed on the stator 11. One end of the cooling air duct 1113 facing the end cover portion 21 is an air duct opening 1114. The air duct opening 1114 is connected to the end gap 10, and in the radial direction of the stator 11, the interior of the air duct opening 1114 is spaced apart from the inner diameter of the wind wheel 24, and the inner diameter of the wind wheel 24 is located radially outside the inner wall of the air duct opening 1114. Therefore, the air duct opening 1114 and the wind wheel 24 are staggered in the radial direction of the stator 11, and the air flow between the wind wheel 24 and the cooling flow channel will turn, and the air flow needs to flow in the end gap 10, so that the contact area between the air flow and the outer rotor motor 100 can be increased, and the air flow can exchange heat with the part between the end cover portion 21 and the stator 11, which is beneficial to improving the cooling effect of the outer rotor motor 100.

[0050] In the above technical solution, by setting the outer diameter of the wind wheel 24 to be less than or equal to the first distance L1, or the inner diameter of the wind wheel 24 to be greater than or equal to the second distance L2, the air duct opening 1114 and the wind wheel 24 are staggered in the radial direction of the stator 11, and the air flow between the wind wheel 24 and the cooling channel will be turned, and the air flow needs to flow in the end gap 10, so that the contact area between the air flow and the outer rotor motor 100 can be increased, and the air flow can exchange heat with the part between the end cover part 21 and the stator 11, which is beneficial to improve the cooling effect of the outer rotor motor 100.

[0051] In some embodiments of the present application, Figure 5 The mounting hole 223 is axially penetrated on the annular portion 22 , and the air inlet end of the wind wheel 24 is arranged toward the stator 11 .

[0052] For example, combined with Figure 5 The mounting hole 223 penetrates the annular portion 22 along the axial direction of the stator 11, the wind wheel 24 is arranged in the mounting hole 223, and the air inlet end of the wind wheel 24 is arranged toward the stator 11, and the air outlet end of the wind wheel 24 is connected to the external environment. There is an end gap 10 between the end cover 21 and one axial end of the stator 11, and the end gap 10 is connected to the air inlet end of the fan. The stator assembly 1 is formed with a cooling air duct 1113, one end of the cooling air duct 1113 is connected to the end gap 10, and the other end is connected to the external environment. When the wind wheel 24 rotates, the air pressure at the air inlet end of the wind wheel 24 is lower than the air outlet end of the wind wheel 24, so as to form a low pressure between the stator 11 and the annular portion 22, and the air in the outer rotor motor 100 is sucked to the space between the stator 11 and the annular portion 22 through the end gap 10 and the cooling air duct 1113, and then blown to the external environment through the wind wheel 24, so as to realize the circulation of the air flow in the outer rotor motor 100. Therefore, by forming a low pressure between the stator 11 and the annular portion 22 , the resistance of the airflow in the outer rotor motor 100 can be reduced, which is beneficial to improving the smoothness of the airflow, thereby improving the heat dissipation effect of the outer rotor motor 100 .

[0053] In the above technical solution, by setting the mounting hole 223 on the annular portion 22 and penetrating it axially, and the air inlet end of the wind wheel 24 is facing the stator 11, a low pressure can be formed between the stator 11 and the annular portion 22. The wind wheel 24 draws air from the axial side of the stator 11, which can reduce the resistance of the airflow in the outer rotor motor 100, which is beneficial to improving the smoothness of the airflow, thereby improving the heat dissipation effect of the outer rotor motor 100.

[0054] In some embodiments of the present application, Figure 3 and Figure 5 The stator 11 includes a bearing seat 111 and a bearing 112 arranged in the bearing seat 111. A center hole 1111 is formed in the center of the bearing seat 111. The rotating shaft 23 is passed through the bearing seat 111. The bearing 112 is located in the center hole 1111 and is sleeved on the rotating shaft 23. A cooling air duct 1113 is formed on the bearing seat 111.

[0055] For example, combined with Figure 3 and Figure 5The stator 11 includes a bearing seat 111 and a bearing 112. A center hole 1111 is formed at the center of the bearing seat 111. The center hole 1111 penetrates the bearing seat 111 along the axial direction of the stator 11. The bearing seat 111 is formed with two grooves 1112. The two grooves 1112 are respectively located at one axial end of the bearing seat 111. The bearing 112 includes a first bearing and a second bearing. The first bearing and the second bearing are arranged on the rotating shaft 23 at intervals along the axial direction of the stator 11. The first bearing and the second bearing are respectively arranged in the corresponding grooves 1112 to ensure that the position of the bearing 112 arranged in the bearing seat 111 is stable. The end cover 21 is located at one axial end of the stator 11, and the end cover 21 is connected to the rotating shaft 23. One axial end of the annular portion 22 is connected to the end cover 21 and surrounds the circumference of the stator 11.

[0056] The bearing seat 111 is formed with a cooling air duct 1113, which runs through the axial ends of the bearing seat 111. The wind wheel 24 is connected to the end cover 21, and the air inlet side of the wind wheel 24 faces one axial end of the stator 11. The annular portion 22 may include a permanent magnet, which interacts with the electromagnetic coil (such as the stator winding 12) provided in the stator 11. The end cover 21, the annular portion 22 rotating shaft 23 and the wind wheel 24 start to rotate, and the wind wheel 24 forms a low pressure between the end cover 21 and the stator 11. The airflow in the cooling air duct 1113 will flow toward the air inlet end of the fan, and the cooling air duct 1113 will inhale air from the end of the bearing seat 111 away from the end cover 21, and flow from the end of the bearing seat 111 close to the end cover 21 toward the wind wheel 24, so as to achieve airflow. The air circulates in the bearing seat 111, and the air flow can exchange heat with the bearing seat 111 to take away the heat of the bearing seat 111. The bearing seat 111 is a part of the stator 11, and the bearing seat 111 is in contact with the bearing 112. Therefore, the heat of the stator 11 (for example, the heat of the stator winding 12 when it is working) and the heat generated by the mechanical movement friction of the bearing 112 can be taken away by the bearing seat 111, thereby reducing the temperature of the outer rotor motor 100 and improving the power density and performance of the outer rotor motor 100.

[0057] In the above technical solution, by arranging the cooling air duct 1113 formed on the bearing seat 111, the space occupied by the bearing seat 111 can be effectively utilized, and the influence on the arrangement of other components can be avoided to a certain extent.

[0058] Optionally, combined Figure 3The outer rotor motor 100 further includes a retaining spring 4, which is disposed on the rotating shaft 23 and clamped on the side of the bearing 112 away from the bearing seat 111. The retaining spring 4 has a certain limiting effect, which can limit the position of the bearing 112 on the rotating shaft 23. For example, the outer rotor motor 100 further includes two bearings 112 and two retaining springs 4, the two bearings 112 are spaced apart on the rotating shaft 23, and the two retaining springs 4 are respectively clamped on the sides of the two bearings 112 that are away from each other.

[0059] Optionally, combined Figure 3 The stator 11 further includes a stator body 113 , and the stator body 113 is formed with a mounting cavity 1132 , and the mounting cavity 1132 can be provided with a bearing seat 111 .

[0060] For example, combined with Figure 3 and Figure 5 The stator 11 includes a stator body 113, a bearing seat 111 and a bearing 112. The stator body 113 is formed with a mounting cavity 1132. The mounting cavity 1132 penetrates the stator body 113 along the axial direction of the stator 11. The bearing seat 111 is arranged in the mounting cavity 1132, and the bearing seat 111 is tightly matched with the cavity wall of the mounting cavity 1132. The end cover portion 21 is located at one axial end of the stator body 113, and the end cover portion 21 is connected to the rotating shaft 23. One axial end of the annular portion 22 is connected to the end cover portion 21 and surrounds the circumference of the stator body 113.

[0061] The stator 11 further includes a stator winding 12, a stator body 113 is formed with a coil slot 1131, the stator winding 12 is arranged in the coil slot 1131, the annular portion 22 further includes a magnetic ring 221 (for example, a permanent magnet), the magnetic ring 221 interacts with the stator winding 12, the end cover 21, the annular portion 22, the rotating shaft 23 and the wind wheel 24 start to rotate, the wind wheel 24 forms a low pressure between the end cover 21 and the stator body 113, the airflow in the cooling air duct 1113 will flow toward the air inlet end of the fan, and the cooling air duct 1113 will inhale air from the end of the bearing seat 111 away from the end cover 21, and from the end of the bearing seat 111 close to the end cover 21 toward the wind. The wheel 24 flows to realize the circulation of airflow in the bearing seat 111, and the airflow can exchange heat with the bearing seat 111 to take away the heat of the bearing seat 111. The bearing seat 111 is in contact with the stator body 113, and the bearing seat 111 can exchange heat with the stator winding 12 to take away the heat of the stator winding 12. The bearing seat 111 is in contact with the bearing 112, and the bearing seat 111 can exchange heat with the bearing 112 to take away the heat generated by the mechanical movement friction of the bearing 112, so that the heat generated by the heat source of the outer rotor motor 100 can be taken away through the bearing seat 111, and the power density and performance of the outer rotor motor 100 can be improved. For example, the outer rotor motor 100 is an outer rotor permanent magnet synchronous motor, such as an electromagnetic topology structure of 18 slots and 16 poles, and 18 windings are evenly distributed in the coil slots 1131 around the center line of the stator body 113. The tooth slot torque of the motor is small, the operation is more stable, and the efficiency is high.

[0062] Optionally, combined Figure 3 The outer rotor motor 100 further includes a support seat 3 (e.g., a stator BMC support seat), which is used to fix the stator 11 to ensure that the stator 11 is stably and reliably arranged. Optionally, the stator 11 and the support seat 3 are integrally injection molded, which is beneficial to improving the overall strength of the stator 11 and the support seat 3, and is beneficial to simplifying the assembly difficulty of the outer rotor motor 100.

[0063] In some embodiments of the present application, Figure 3 and Figure 4 There are at least two cooling air ducts 1113 , which are spaced apart around the central hole 1111 .

[0064] For example, combined with Figure 3 and Figure 4 The bearing seat 111 is formed with a plurality of cooling air ducts 1113 , which are arranged in sequence and equidistantly around the center hole 1111 , and the inner walls of the cooling air ducts 1113 are spaced apart from the outer peripheral wall of the bearing seat 111 and the hole wall of the center hole 1111 .

[0065] In the above technical solution, there are at least two cooling air ducts 1113, which are spaced apart around the center hole 1111, which can increase the air flow in the outer rotor motor 100 and ensure the uniformity of heat dissipation of each part of the bearing seat 111, which is beneficial to improving the heat dissipation effect of the outer rotor motor 100.

[0066] In some embodiments of the present application, Figure 4 There are at least two cooling air ducts 1113, and the interval between two adjacent cooling air ducts 1113 is at least 2 mm; the minimum spacing between the inner surface of the cooling air duct 1113 and the inner surface of the center hole 1111 is L1, which is greater than or equal to 2 mm, and the minimum spacing between the inner surface of the cooling air duct 1113 and the outer surface of the bearing seat 111 is L2, which is greater than or equal to 2 mm. In this way, it can be ensured that the bearing 112 chamber has a suitable strength, and to a certain extent, the deformation of the bearing 112 chamber can be avoided to cause noise when the outer rotor motor 100 is working.

[0067] For example, combined with Figure 4 A plurality of cooling air ducts 1113 are formed on the bearing seat 111, and the plurality of cooling air ducts 1113 are equidistantly arranged in sequence along the circumference of the stator 11. In the radial direction of the stator 11, the minimum spacing between the inner surface of the cooling air duct 1113 and the inner surface of the center hole 1111 is L1, and the minimum spacing between the inner surface of the cooling air duct 1113 and the outer surface of the bearing seat 111 is L2.

[0068] In some embodiments of the present application, the bearing seat 111 is a heat conductor.

[0069] For example, the bearing seat 111 is a metal part (such as an aluminum part, etc.).

[0070] In the above technical solution, by setting the bearing seat 111 as a heat conductor, the heat transfer efficiency of the bearing seat 111 can be improved. The bearing seat 111 can quickly transfer the heat generated by the heat source components of the outer rotor motor 100 (such as the stator winding 12 and the bearing 112), and diffuse the heat to the external environment through the cooling air duct 1113, thereby improving the heat dissipation effect of the outer rotor motor 100.

[0071] In some embodiments of the present application, the annular portion 22 is an injection molded part, and the wind wheel 24 is fixedly connected to the annular portion 22 by injection molding of the annular portion 22. Thus, the connection strength between the wind wheel 24 and the annular portion 22 can be improved, thereby improving the working stability of the wind wheel 24.

[0072] Optionally, combined Figure 3 and Figure 5The annular portion 22 includes a magnetic ring 221 and an injection molding portion 222, and the injection molding portion 222 connects the magnetic ring 221 and the wind wheel 24. For example, the magnetic ring 221 and the wind wheel 24 are connected together by injection molding, and the injection-molded component is the injection molding portion 222, and the injection molding portion 222 connects the magnetic ring 221 and the wind wheel 24 so that the magnetic ring 221 and the wind wheel 24 are injection-molded as an integral part, wherein the injection molding portion 222 is formed with a mounting hole 223, and the wind wheel 24 is arranged in the mounting hole 223.

[0073] Optionally, in some embodiments, the annular portion 22, the wind wheel 24 and the end cover portion 21 are integrally injection molded, which can improve the connection strength of the annular portion 22, the wind wheel 24 and the end cover portion 21 and simplify the assembly difficulty of the outer rotor motor 100. Figure 1 and Figure 3 The annular portion 22, the wind wheel 24 and the end cover portion 21 are fixedly connected as an integral part by injection molding. A plurality of screw columns 5 are provided on the upper side of the end cover portion 21. The screw columns 5 are used to connect with components (such as the cross-flow wind wheel described below) to facilitate the operation of the outer rotor motor 100 to drive the components to rotate.

[0074] In a second aspect, an embodiment of the present application provides a fan component, including a crossflow impeller and an outer rotor motor 100 according to the embodiment of the first aspect, wherein the outer rotor motor 100 is connected to one axial end of the crossflow impeller.

[0075] In the above technical solution, by adopting the above outer rotor motor 100, the working stability of the fan components can be improved.

[0076] In a third aspect, an embodiment of the present application provides an air conditioner, comprising a fan component according to the embodiment of the second aspect above.

[0077] In the above technical solution, the performance of the air conditioner can be improved by adopting the above fan component.

[0078] In the description of the present utility model, it should be understood that the terms "center", "length", "thickness", "upper", "lower", "inner", "outer", "axial", "radial" 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.

[0079] 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.

[0080] 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.

[0081] 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. 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, the rotor assembly comprising an end cover, an annular portion, a rotating shaft and a wind wheel, the end cover is arranged at one axial end of the stator, the annular portion is connected to the end cover and surrounds the circumference of the stator, the rotating shaft is connected to the end cover and penetrates the center hole, the wind wheel is connected to at least one of the end cover, the annular portion and the rotating shaft, and the wind wheel has an air inlet end or an air outlet end arranged toward the stator; Wherein, the outer rotor motor is arranged in a cooling air duct, and the cooling air duct is connected to the air inlet end and / or the air outlet end of the wind wheel.

2. The outer rotor motor according to claim 1, characterized in that: The annular portion is provided with a mounting hole, the mounting hole is through-set at least on a side facing the stator, and the wind wheel is arranged in the mounting hole; An end gap is provided between the stator and the end cover portion, and the cooling air duct is arranged on the stator assembly and communicates with the end gap.

3. The outer rotor motor according to claim 2, characterized in that: One end of the cooling air duct facing the end cover is an air duct opening, the minimum distance between the inner wall of the air duct opening and the axis of the rotating shaft is a first distance L1, and the maximum distance between the inner wall of the air duct opening and the axis of the rotating shaft is a second distance L2; The outer diameter of the wind wheel is less than or equal to the first distance L1, or the inner diameter of the wind wheel is greater than or equal to the second distance L2.

4. The outer rotor motor according to claim 2, characterized in that: The mounting hole is axially penetrated on the annular portion, and the air inlet end of the wind wheel is arranged toward the stator.

5. The outer rotor motor according to claim 1, characterized in that: The stator includes a bearing seat and a bearing arranged in the bearing seat, the center of the bearing seat forms the center hole, the rotating shaft passes through the bearing seat, the bearing is located in the center hole and is sleeved on the rotating shaft, and the cooling air duct is formed on the bearing seat.

6. The outer rotor motor according to claim 5, characterized in that: There are at least two cooling air ducts, which are spaced apart and distributed around the central hole.

7. The outer rotor motor according to claim 5, characterized in that: There are at least two cooling air ducts, and the interval between two adjacent cooling air ducts is at least 2 mm; The minimum distance between the inner surface of the cooling air duct and the inner surface of the central hole is L1, and L1 is greater than or equal to 2 mm. The minimum distance between the inner surface of the cooling air duct and the outer surface of the bearing seat is L2, and L2 is greater than or equal to 2 mm.

8. The outer rotor motor according to claim 5, characterized in that: The bearing seat is a heat conductor.

9. The outer rotor motor according to any one of claims 1 to 8, characterized in that: The annular portion is an injection-molded part, and the wind wheel is fixedly connected to the annular portion by injection-molding the annular portion.

10. A fan component, characterized in that: It comprises a crossflow wind wheel and an outer rotor motor according to any one of claims 1 to 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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