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, a rotor assembly and a retainer ring, the stator assembly comprises a stator, and the stator is provided with a central hole; the rotor assembly comprises a shell and a rotating shaft, the shell rotatably covers the outer side of the stator, an annular space is formed between the inner circumferential surface of the shell and the outer circumferential surface of the stator, and the rotating shaft is connected with the shell and penetrates through the center hole; the check ring is arranged on at least one of the stator and the shell, and the check ring is located at at least one end of the annular space in the axial direction. According to the external rotor motor provided by the embodiment of the utility model, the retainer ring can prevent sundries from entering the annular space, so that the working stability of the external rotor motor is 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 the related art, during the operation of the outer rotor motor, debris (such as dust, metal debris, etc.) may enter between the related components of the outer rotor motor, which may affect the operation of the outer rotor 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 an outer rotor motor, a fan component and an air conditioner, wherein the retaining ring can prevent debris from entering the annular gap, thereby improving the working stability of the outer rotor motor.

[0004] In a first 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 comprising a shell and a rotating shaft, the shell being rotatably covered on the outside of the stator, an annular gap being formed between the inner circumference of the shell and the outer circumference of the stator, the rotating shaft being connected to the shell and passing through the center hole; a retaining ring, the retaining ring being provided on at least one of the stator and the shell, the retaining ring being located at at least one end of the annular gap in the axial direction.

[0005] In the above technical solution, by arranging the retaining ring at at least one end of the annular gap in the axial direction, the gasket can have a certain blocking effect on the annular gap, so that the retaining ring can prevent foreign objects from entering the annular gap. At the same time, it can avoid foreign objects from being sucked into the annular gap due to the magnetism of the housing or the stator to a certain extent, thereby ensuring the normal operation of the outer rotor motor and improving the working stability of the outer rotor motor. Secondly, the solution of setting the retaining ring to achieve annular gap protection is simple in structure and can reduce the cost of the outer rotor motor.

[0006] In some embodiments of the present application, the housing includes: an end cover portion and an annular portion, the end cover portion is arranged at one axial end of the stator, and the annular portion is arranged around the circumference of the stator; at least a portion of the annular portion is a first excitation component, and the stator includes a second excitation component coupled to the first excitation component.

[0007] In some embodiments of the present application, the retaining ring includes a first retaining ring provided on an end surface of the stator facing the end cover portion, and the first retaining ring is spaced apart from the end cover portion.

[0008] In some embodiments of the present application, the retaining ring also includes a second retaining ring, which is disposed on the surface of the end cover portion facing the stator, or on the inner circumferential surface of the annular portion, and the first retaining ring and the second retaining ring are arranged radially, and the second retaining ring is spaced from the stator and the first retaining ring.

[0009] In some embodiments of the present application, the axial dimension of the retaining ring is 2-5 mm.

[0010] In some embodiments of the present application, the outer circumferential surface of the retaining ring is arranged flush with the outer circumferential surface of the stator.

[0011] In some embodiments of the present application, a mounting hole is provided on the annular portion, and the mounting hole is through-set at least on the side facing the stator, and the rotor assembly also includes a wind wheel assembled in the mounting hole; a cooling air duct is provided in the outer rotor motor, and the cooling air duct is connected to the mounting hole.

[0012] In some embodiments of the present application, the stator includes a bearing seat and a bearing disposed in the bearing seat, the rotating shaft is passed through the bearing seat, and the bearing is sleeved on the rotating shaft; the cooling air duct is formed on the bearing seat.

[0013] In some embodiments of the present application, the retaining ring is formed on the stator by integral injection molding.

[0014] In a second 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 first aspect of the utility model, 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 of the utility model.

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

[0022] Figure 3 is a partial cross-sectional view of an outer rotor motor provided by some embodiments of the present application;

[0023] Figure 4 is a partial schematic diagram of a first retaining ring and a second retaining ring provided in some embodiments of the present application;

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

[0025] Figure 6 is a schematic diagram of a second excitation member and a bearing seat provided in some embodiments of the present application;

[0026] Figure 7 is another exploded diagram of an outer rotor motor provided in some embodiments of the present application.

[0027] Reference numerals:

[0028] Outer rotor motor 100, air gap 8, annular gap 9, end gap 10,

[0029] 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, second excitation component 12,

[0030] Rotor assembly 2, housing 21, end cover 211, annular portion 212, first excitation member 2121, injection molding portion 2122, mounting hole 2123, rotating shaft 22, wind wheel 23,

[0031] Support seat 3, retaining ring 4, screw column 5,

[0032] Retaining ring 6, first retaining ring 61, second retaining ring 62. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] Hereinafter, an outer rotor motor 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0036] like Figure 1 and Figure 2 As shown, the outer rotor motor 100 according to the embodiment of the utility model includes a stator assembly 1, a rotor assembly 2 and a retaining ring 6, the stator assembly 1 includes a stator 11, and the stator 11 has a center hole 1111; the rotor assembly 2 includes a shell 21 and a rotating shaft 22, the shell 21 is rotatably covered on the outside of the stator 11, and an annular gap 9 is formed between the inner circumference of the shell 21 and the outer circumference of the stator 11, and the rotating shaft 22 is connected to the shell 21 and penetrates the center hole 1111; the retaining ring 6 is provided on at least one of the stator 11 and the shell 21, and the retaining ring 6 is located at at least one end of the annular gap 9 in the axial direction.

[0037] Thus, by arranging the retaining ring 6 at at least one end of the annular gap 9 in the axial direction, the gasket can have a certain blocking effect on the annular gap 9, so that the retaining ring 6 can prevent debris (such as impurities, dust, or metal debris, etc.) from entering the annular gap 9. At the same time, to a certain extent, it can avoid the magnetism of the housing 21 or the stator 11 from sucking the debris into the annular gap 9, thereby ensuring the normal operation of the outer rotor motor 100 and improving the working stability of the outer rotor motor 100. Secondly, the solution of setting the retaining ring 6 to achieve the protection of the annular gap 9 is simple in structure, which can reduce the cost of the outer rotor motor 100.

[0038] Optionally, the retaining ring 6 is provided on at least one of the stator 11 and the housing 21, and the retaining ring 6 is located at at least one end of the annular gap 9 in the axial direction. Then, the retaining ring 6 is provided on the stator 11, and there is one retaining ring 6, and the retaining ring 6 is located at one end of the annular gap 9 in the axial direction, or there are two retaining rings 6, and the two retaining rings 6 are respectively located at one end of the annular gap 9 in the axial direction; or the retaining ring 6 can be provided on the housing 21, and there is one retaining ring 6, and the retaining ring 6 is located at one end of the annular gap 9 in the axial direction, or there are two retaining rings 6, and the two retaining rings 6 are respectively located at one end of the annular gap 9 in the axial direction. Alternatively, there are two retaining rings 6, one of which is provided on the stator 11, and one of the retaining rings 6 is located at one end of the annular gap 9 in the axial direction, and the other is provided on the housing 21, and the other retaining ring 6 is located at the other end of the annular gap 9 in the axial direction.

[0039] For example, the following description is made by taking the case where there is one retaining ring 6, the retaining ring 6 is provided on the stator 11, and the retaining ring 6 is located at one end of the annular gap 9 in the axial direction. Figure 1 , Figure 2 and Figure 5 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 penetrating in the axial direction. The rotor assembly 2 includes a housing 21 and a rotating shaft 22. The housing 21 is sleeved on the outer side of the stator 11 and is rotatable relative to the stator 11. An annular gap 9 is formed between the inner circumference of the housing 21 and the outer circumference of the stator 11. The rotating shaft 22 is connected to the housing 21, and the rotating shaft 22 is penetrated in the center hole 1111. A bearing 112, such as a deep groove ball bearing 112, is sleeved on the rotating shaft 22. The outer side of the bearing 112 is used to cooperate with the inner wall of the center hole 1111, so as to rotatably cooperate the rotating shaft 22 with the stator 11. The housing 21 may include a permanent magnet, and the stator 11 includes an electromagnetic coil (such as a stator winding). When the permanent magnet interacts with the electromagnetic coil, the housing 21 will start to rotate.

[0040] Among them, the outer rotor motor 100 also includes a gasket, which is arranged at one axial end of the stator 11 and located between the outer shell 21 and the stator 11. The gasket is located at one axial end of the annular gap 9, and the outer peripheral side of the gasket is spaced from the inner peripheral surface of the outer shell 21. Therefore, the gasket increases the distance between the axial end of the annular gap 9 and the debris in the axial direction, and the gasket has a certain blocking effect on the debris in the radial direction, so that the gasket can reduce the dust, metal debris, etc. that enter the annular gap 9 due to the magnetic attraction of the permanent magnet or the electromagnetic coil, and can reduce the influence of the debris on the relative rotation between the outer shell 21 and the stator 11, which is beneficial to improve the working stability of the outer rotor motor 100.

[0041] In the above technical solution, by arranging the retaining ring 6 at at least one end of the annular gap 9 in the axial direction, the gasket can have a certain blocking effect on the annular gap 9, so that the retaining ring 6 can prevent debris (such as dust, metal debris, etc.) from entering the annular gap 9. At the same time, to a certain extent, it can avoid the magnetism of the housing 21 or the stator 11 from sucking the debris into the annular gap 9, thereby ensuring the normal operation of the outer rotor motor 100 and improving the working stability of the outer rotor motor 100. Secondly, the solution of setting the retaining ring 6 to achieve the protection of the annular gap 9 is simple in structure and can reduce the cost of the outer rotor motor 100.

[0042] In some embodiments of the present application, Figure 2 and Figure 5 The housing 21 includes an end cover 211 and an annular portion 212. The end cover 211 is disposed at one axial end of the stator 11, and the annular portion 212 is disposed around the circumference of the stator 11. At least part of the annular portion 212 is a first excitation member 2121, and the stator 11 includes a second excitation member 12 coupled to the first excitation member 2121. Thus, the first excitation member 2121 interacts with the second excitation member 12 to enable the housing 21 to rotate relative to the stator 11.

[0043] Optionally, the retaining ring 6 is disposed on the housing 21 , and the retaining ring 6 is disposed on the annular portion 212 , and the retaining ring 6 is located at one end of the annular gap 9 in the axial direction.

[0044] For example, combined with Figure 2 and Figure 5 The housing 21 includes an end cover portion 211 and an annular portion 212. The end cover portion 211 is located at one axial end of the stator 11 and is connected to the edge of the annular portion 212. The annular portion 212 includes a first excitation component 2121. The first excitation component 2121 is formed as a magnetic ring. The first excitation component 2121 is configured as a cylindrical structure and surrounds the outer peripheral side of the stator 11. The annular portion 212 is spaced apart from the stator 11. The stator 11 includes a second excitation component 12. The second excitation component 12 is an electromagnetic coil. The first excitation component 2121 is coupled to the second excitation component 12, and an annular gap 9 is formed between the first excitation component 2121 and the second excitation component 12. The retaining ring 6 is arranged at the end of the stator 11 facing the end cover portion 211, and the retaining ring 6 is spaced from the annular portion 212 and is located at the end of the annular gap 9 facing the end cover portion 211 in the axial direction. The retaining ring 6 can increase the distance between the axial end of the annular gap 9 and the debris, effectively reducing the debris from entering the annular gap 9 due to the magnetic attraction of the first excitation component 2121 or the second excitation component 12, thereby preventing the debris from entering the annular gap 9 and affecting the operation of the outer rotor motor 100 to a certain extent.

[0045] Optionally, the annular portion 212 includes a first excitation member 2121 (e.g., a magnetic ring), and in the axial direction of the stator 11, the first excitation member 2121 protrudes from the end surface of the stator 11 toward one end of the end cover portion 211, so that the outer rotor motor 100 can effectively utilize the performance of the stator 11 and improve the performance of the outer rotor motor 100. The retaining ring 6 is provided on at least one of the first excitation member 2121 and the stator 11, and the retaining ring 6 is located at one end of the annular gap 9 facing the end cover portion 211 in the axial direction, so that the retaining ring 6 can effectively prevent foreign objects from entering the annular gap 9, or prevent foreign objects from entering the annular gap 9 due to the magnetic attraction of the portion of the first excitation member 2121 protruding from the stator 11, thereby improving the performance of the outer rotor motor 100 while improving the operating stability of the outer rotor motor 100. Optionally, in the axial direction of the stator 11, the retaining ring 6 is arranged on the end face of the stator 11, and the retaining ring 6 protrudes from the end face of the first excitation member 2121, and the distance between the end face of the retaining ring 6 facing the end cover 211 and the end face of the first excitation member 2121 facing the end cover 211 is x1, 0.5mm≤x1≤0.75mm. So that the retaining ring 6 has a suitable thickness to effectively block the part of the first excitation member 2121 protruding from the stator 11, to a certain extent, to prevent foreign objects from entering the annular gap 9, or the first excitation member 2121 attracts foreign objects into the annular gap 9, which can improve the stability of the operation of the outer rotor motor 100.

[0046] In some embodiments of the present application, Figure 2 The retaining ring 6 includes a first retaining ring 61 disposed on the end surface of the stator 11 facing the end cover 211, and the first retaining ring 61 is spaced apart from the end cover 211. Thus, the retaining ring 6 can utilize the space between the stator 11 and the end cover 211 to facilitate the arrangement of the gasket, and the first retaining ring 61 is spaced apart from the end cover 211 to avoid interference between the first retaining ring 61 and the end cover 211 and affect the rotation of the housing 21.

[0047] Optionally, in the axial direction of the stator 11 , the distance between the first retaining ring 61 and the end cover portion 211 is x2, 3mm≤x2, so that there is a suitable spacing between the first retaining ring 61 and the end cover portion 211 to avoid interference between the first retaining ring 61 and the end cover portion 211 due to axial movement of the rotor assembly 2.

[0048] In some embodiments of the present application, Figure 4The retaining ring 6 also includes a second retaining ring 62, which is disposed on the surface of the end cover portion 211 facing the stator 11, or on the inner circumferential surface of the annular portion 212. The first retaining ring 61 and the second retaining ring 62 are arranged radially, and the second retaining ring 62 is spaced from the stator 11 and the first retaining ring 61. Thus, an air gap 8 is formed between the first retaining ring 61, the second retaining ring 62 and the stator 11, and the air gap 8 can effectively prevent the debris in the outer rotor motor 100 from moving toward the annular gap 9, thereby preventing the debris from entering the annular gap 9 and affecting the operation of the outer rotor motor 100.

[0049] Optionally, in the axial direction of the stator 11 , the distance between the second retaining ring 62 and the stator 11 is x3, 3mm≤x3, so that there is a suitable spacing between the second retaining ring 62 and the end surface of the stator 11 to avoid interference between the second retaining ring 62 and the stator 11 .

[0050] Optionally, the first retaining ring 61 is arranged on the end face of the stator 11 facing the end cover portion 211, the second retaining ring 62 is arranged on the surface of the end cover portion 211 facing the stator 11, or the second retaining ring 62 is arranged on the inner circumferential surface of the annular portion 212, the first retaining ring 61 and the second retaining ring 62 are arranged along the radial direction of the stator 11, and the second retaining ring 62 is spaced from the stator 11 and the first retaining ring 61, so that an air gap 8 is formed between the first retaining ring 61, the second retaining ring 62 and the stator 11, and one radial end of the air gap 8 is connected to the annular gap 9. Thus, the first retaining ring 61 and the second retaining ring 62 form an air gap 8, which can effectively prevent debris from moving toward the annular gap 9, thereby preventing debris from entering the annular gap 9 and affecting the operation of the outer rotor motor 100.

[0051] For example, combined with Figure 2 and Figure 4 The housing 21 includes an end cover portion 211 and an annular portion 212. The annular portion 212 is arranged around the circumferential side of the stator 11. An annular gap 9 is formed between the inner circumferential surface of the annular portion 212 and the outer circumferential surface of the stator 11. The first retaining ring 61 is arranged on the end surface of the stator 11 facing the end cover portion 211. The second retaining ring 62 is arranged on the inner circumferential surface of the annular portion 212, and the second retaining ring 62 is axially spaced from the end surface of the stator 11. The first retaining ring 61 is located radially inside the second retaining ring 62, and an air gap 8 is formed between the first retaining ring 61, the second retaining ring 62 and the stator 11. One radial end of the air gap 8 is connected to one axial end of the annular gap 9, and the air gap 8 is formed into a "∟"-shaped structure. Therefore, the air gap 8 can effectively prevent debris in the outer rotor motor 100 from moving toward the annular gap 9, thereby preventing debris from entering the annular gap 9 and affecting the operation of the outer rotor motor 100.

[0052] In some embodiments of the present application, the axial dimension of the retaining ring 6 is 2-5 mm. Thus, the axial dimension of the retaining ring 6 is within a suitable range, so that the gasket has a suitable height to prevent debris from entering the annular gap 9, and at the same time, it is helpful to reduce the influence of the gasket on the axial dimension of the outer rotor motor 100, which is conducive to maintaining the miniaturization of the outer rotor motor 100.

[0053] In some embodiments of the present application, Figure 2 The outer circumference of the retaining ring 6 is flush with the outer circumference of the stator 11, and the distance between the retaining ring 6 and the inner circumference of the housing 21 in the radial direction of the stator 11 is equal to the radial width of the annular gap 9, so that there is a suitable spacing between the outer circumference of the retaining ring 6 and the inner circumference of the housing 21 to avoid the retaining ring 6 affecting the airflow inside and outside the annular gap 9 and affecting the heat dissipation of the outer rotor motor 100, which is conducive to meeting the heat dissipation requirements of the outer rotor motor 100 at the annular gap 9. At the same time, interference between the retaining ring 6 and the housing 21 can be avoided.

[0054] In some embodiments of the present application, Figure 1 and Figure 2 A mounting hole 2123 is provided on the annular portion 212, and the mounting hole 2123 is through-set at least on the side facing the stator 11. The rotor assembly 2 also includes a wind wheel 23 assembled in the mounting hole 2123; a cooling air duct 1113 is provided in the outer rotor motor 100, and the cooling air duct 1113 is connected to the mounting hole 2123.

[0055] Optionally, the retaining ring 6 is provided on at least one of the stator 11 and the housing 21, and the retaining ring 6 is located at one end of the annular gap 9 facing the end cover 211. Thus, the retaining ring 6 is provided between the end cover 211 and the end of the stator 11, so that the retaining ring 6 can prevent the debris driven by the airflow to move toward the mounting hole 2123 from entering the annular gap 9, so that while the airflow is circulated in the outer rotor motor 100 to continuously cool the outer rotor motor 100, it is prevented that the debris enters the annular gap 9 and affects the operation of the outer rotor motor 100, thereby improving the working stability of the outer rotor motor 100.

[0056] For example, combined with Figure 1 and Figure 2The end cover 211 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 211. The annular portion 212 is connected to the end cover 211 and is arranged around the stator 11, so that the end cover 211 and the annular portion 212 are covered on the outside of the stator 11, and an annular gap 9 is formed between the annular portion 212 and the stator 11, and the annular gap 9 is connected with the end gap 10. The annular portion 212 is provided with a mounting hole 2123, and the mounting hole 2123 is penetrated toward one side of the stator 11, and a wind wheel 23 is arranged in the mounting hole 2123 to ensure reliable connection between the wind wheel 23 and the mounting hole 2123. The air inlet end of the wind wheel 23 is arranged toward the stator 11, and the air outlet end of the wind wheel 23 is arranged toward the external environment, and a cooling air duct 1113 is provided in the outer rotor motor 100, and the cooling air duct 1113 is connected with the end gap 10.

[0057] Among them, the retaining ring 6 is arranged on the end surface of the stator 11 and is located in the end gap 10, and the retaining ring 6 is located at one axial end of the annular gap 9. When the outer rotor motor 100 is working, the wind wheel 23 rotates to drive the air flow in 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, and then the air flow flows from the end gap 10 to the air inlet end of the wind wheel 23 and flows out from the air outlet end through the air outlet. As a result, the inhaled debris (such as dust, metal debris, etc.) will flow along the cooling air duct 1113 and the end gap 10 with the air flow, and the retaining ring 6 can prevent the debris driven by the air flow from entering the annular gap 9, so that while realizing the circulation of the air flow in the outer rotor motor 100, the outer rotor motor 100 is continuously cooled and cooled, and the debris is prevented from entering the annular gap 9 and affecting the operation of the outer rotor motor 100, thereby improving the working stability of the outer rotor motor 100.

[0058] Optionally, the annular portion 212 is provided with a mounting hole 2123 that penetrates the annular portion 212 axially or radially along the stator 11. For example, the annular portion 212 is formed with mounting holes 2123 that penetrate the thickness of the annular portion 212 along the radial direction of the stator 11 on both sides. The wind wheel 23 is arranged in the mounting hole 2123. The wind inlet end of the wind wheel 23 faces the external environment, the wind outlet end of the wind wheel 23 faces the stator 11, the wind outlet end of the wind wheel 23 is connected with the end gap 10, one end of the cooling air duct 1113 is connected with the end gap 10, and the other end is connected with the external environment. When the wind wheel 23 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, and 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.

[0059] In the above technical solution, a mounting hole 2123 is provided on the annular portion 212, and the wind wheel 23 is arranged in the mounting hole 2123. The wind wheel 23 can rotate with the outer shell 21 to form an air pressure difference between the outer shell 21 and the stator 11, 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.

[0060] In some embodiments of the present application, Figure 2 and Figure 5 The end of the cooling air duct 1113 facing the end cover portion 211 is the air duct opening 1114, the minimum distance between the inner wall of the air duct opening 1114 and the axis of the rotating shaft 22 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 22 is a second distance L2; the outer diameter of the wind wheel 23 is less than or equal to the first distance L1, or the inner diameter of the wind wheel 23 is greater than or equal to the second distance L2.

[0061] For example, combined with Figure 2 and Figure 5 The wind wheel 23 is connected to the annular portion 212, and the wind wheel 23 is formed into an annular structure. An end gap 10 is provided between the end cover portion 211 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 211 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 23, and the inner diameter of the wind wheel 23 is located radially outside the inner wall of the air duct opening 1114. Therefore, the air duct opening 1114 and the wind wheel 23 are staggered in the radial direction of the stator 11, and the air flow between the wind wheel 23 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 inner part of the outer rotor motor 100 can be increased, and the air flow can exchange heat with the part between the end cover portion 211 and the stator 11, which is beneficial to improving the cooling effect of the outer rotor motor 100.

[0062] In the above technical solution, by setting the outer diameter of the wind wheel 23 to be less than or equal to the first distance L1, or the inner diameter of the wind wheel 23 to be greater than or equal to the second distance L2, the air duct opening 1114 and the wind wheel 23 are staggered in the radial direction of the stator 11, and the air flow between the wind wheel 23 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 211 and the stator 11, which is beneficial to improve the cooling effect of the outer rotor motor 100.

[0063] In some embodiments of the present application, Figure 2 The mounting hole 2123 is axially penetrated on the annular portion 212 , and the air inlet end of the wind wheel 23 is arranged toward the stator 11 .

[0064] For example, combined with Figure 2 The mounting hole 2123 penetrates the annular portion 212 along the axial direction of the stator 11, the wind wheel 23 is arranged in the mounting hole 2123, and the air inlet end of the wind wheel 23 is arranged toward the stator 11, and the air outlet end of the wind wheel 23 is connected to the external environment. There is an end gap 10 between the end cover 211 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 11 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 23 rotates, the air pressure at the air inlet end of the wind wheel 23 is lower than the air outlet end of the wind wheel 23, so as to form a low pressure between the stator 11 and the annular portion 212, and the air in the outer rotor motor 100 is sucked to the space between the stator 11 and the annular portion 212 through the end gap 10 and the cooling air duct 1113, and then blown to the external environment through the wind wheel 23, 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 212 , 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 .

[0065] Among them, one axial end of the annular gap 9 is connected to the end gap 10. When the airflow in the cooling air duct 1113 flows toward the air inlet end of the fan, the airflow in the cooling air duct 1113 first passes through the end gap 10, and then the airflow flows toward the air inlet end of the fan. A retaining ring 6 is provided on the end surface of the stator 11 facing the end cover 211. The retaining ring 6 is located at the axial end of the annular gap 9 facing the end cover 211. Therefore, the retaining ring 6 can have a certain blocking effect, and can prevent the sundries (dust, metal debris, etc.) flowing with the airflow from entering the annular gap 9, thereby improving the operating stability of the outer rotor motor 100.

[0066] In the above technical solution, by setting the mounting hole 2123 on the annular portion 212 so as to penetrate axially, and the air inlet end of the wind wheel 23 is facing the stator 11, a low pressure can be formed between the stator 11 and the annular portion 212. The wind wheel 23 draws air from one 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.

[0067] In some embodiments of the present application, Figure 2 , Figure 5 and Figure 7The stator 11 includes a bearing seat 111 and a bearing 112 disposed in the bearing seat 111 , the rotating shaft 22 is passed through the bearing seat 111 , and the bearing 112 is sleeved on the rotating shaft 22 ; a cooling air duct 1113 is formed on the bearing seat 111 .

[0068] For example, combined with Figure 2-Figure 3 and Figure 7 The 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 22 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 portion 211 is located at one axial end of the stator 11, and the end cover portion 211 is connected to the rotating shaft 22. One axial end of the annular portion 212 is connected to the end cover portion 211 and surrounds the circumference of the stator 11.

[0069] The bearing seat 111 is formed with a cooling air duct 1113 , which runs through both axial ends of the bearing seat 111 . The wind wheel 23 is connected to the end cover 211 , and the air inlet side of the wind wheel 23 faces one axial end of the stator 11 . The annular portion 212 may include a first excitation component 2121 (for example, a permanent magnet), which interacts with a second excitation component 12 (for example, an electromagnetic coil) included in the stator 11, and the end cover 211, the annular portion 212, the rotating shaft 22 and the wind wheel 23 begin to rotate. The wind wheel 23 forms a low pressure between the end cover 211 and the stator 11, and the air flow in the cooling air duct 1113 flows toward the air inlet end of the fan. The cooling air duct 1113 then inhales air from the end of the bearing seat 111 away from the end cover 211, and flows from the end of the bearing seat 111 close to the end cover 211 toward the wind wheel 23, so as to realize the circulation of the air flow 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 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 generated when the stator winding is working) and the heat generated by the mechanical movement friction of the bearing 112 can be taken away through 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.

[0070] 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.

[0071] Optionally, combined Figure 2 The outer rotor motor 100 further includes a retaining spring 4, which is disposed on the rotating shaft 22 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 22. 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 22, and the two retaining springs 4 are clamped on the sides of the two bearings 112 that are away from each other.

[0072] Optionally, combined Figure 7 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 .

[0073] For example, combined with Figure 2 and Figure 7 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 211 is located at one axial end of the stator body 113, and the end cover portion 211 is connected to the rotating shaft 22. One axial end of the annular portion 212 is connected to the end cover portion 211 and surrounds the circumference of the stator body 113.

[0074] The stator 11 further includes a second excitation component 12, which is a stator winding. The stator body 113 is formed with a coil slot 1131, and the stator winding is arranged in the coil slot 1131. The annular portion 212 further includes a first excitation component 2121, and the first excitation component 2121 is a magnetic ring (such as a permanent magnet). The magnetic ring interacts with the stator winding, and the end cover 211, the annular portion 212, the rotating shaft 22 and the wind wheel 23 start to rotate. The wind wheel 23 forms a low pressure between the end cover 211 and the stator body 113, and the air flow in the cooling air duct 1113 will flow toward the air inlet end of the fan. The cooling air duct 1113 inhales air from the end of the bearing seat 111 away from the end cover 211, and exhausts air from the bearing seat. One end of the bearing 111 close to the end cover 211 flows toward the wind wheel 23 to realize the circulation of the 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 to take away the heat of the stator winding. 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 a slot pole, and each winding is evenly distributed in the coil slot 1131 around the center line of the stator body 113. The tooth torque of the motor is small, the operation is more stable, and the efficiency is high.

[0075] Optionally, combined Figure 1 and Figure 2 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.

[0076] In some embodiments of the present application, Figure 5 and Figure 7 There are at least two cooling air ducts 1113 , which are spaced apart around the central hole 1111 .

[0077] For example, combined with Figure 5 and Figure 7 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 .

[0078] 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.

[0079] In some embodiments of the present application, Figure 6 There are at least two cooling air ducts 1113, the interval between two adjacent cooling air ducts 1113 is at least 2 mm, and the interval between the cooling air duct 1113 and the inner wall and the outer wall of the bearing seat 111 is also at least 2 mm. In this way, it can be ensured that the bearing 112 chamber has a suitable strength, and to a certain extent, it can be avoided that the bearing 112 chamber is deformed and causes noise when the outer rotor motor 100 is working.

[0080] In some embodiments of the present application, the bearing seat 111 is a heat conductor.

[0081] For example, the bearing seat 111 is a metal part (such as an aluminum part, etc.).

[0082] 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 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.

[0083] In some embodiments of the present application, the annular portion 212 is an injection molded part, and the wind wheel 23 is fixedly connected to the annular portion 212 by injection molding of the annular portion 212. Thus, the connection strength between the wind wheel 23 and the annular portion 212 can be improved, thereby improving the working stability of the wind wheel 23.

[0084] Optionally, combined Figure 2 and Figure 5 The annular portion 212 includes a first excitation component 2121 and an injection molding portion 2122, and the injection molding portion 2122 connects the first excitation component 2121 and the wind wheel 23. For example, the first excitation component 2121 and the wind wheel 23 are connected together by injection molding, and the injection-molded component is the injection molding portion 2122, and the injection molding portion 2122 connects the first excitation component 2121 and the wind wheel 23, so that the magnetic ring and the wind wheel 23 are connected as an integral part by injection molding, wherein the injection molding portion 2122 is formed with a mounting hole 2123, and the wind wheel 23 is arranged in the mounting hole 2123.

[0085] Optionally, in some embodiments, the annular portion 212, the wind wheel 23 and the end cover portion 211 are integrally injection molded, which can improve the connection strength of the annular portion 212, the wind wheel 23 and the end cover portion 211 and simplify the assembly difficulty of the outer rotor motor 100. Figure 2 and Figure 5 The annular portion 212, the wind wheel 23 and the end cover portion 211 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 211. 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.

[0086] In some embodiments of the present application, the retaining ring 6 is formed on the stator 11 by integral injection molding. Thus, the connection strength between the retaining ring 6 and the stator 11 can be improved, which is conducive to simplifying the assembly difficulty of the outer rotor motor 100, and can eliminate the movement of the retaining ring 6 due to vibration and the like, which affects the setting position of the retaining ring 6, and can improve the stability and reliability of the retaining ring 6 in preventing debris from entering the annular gap 9.

[0087] 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 of the utility model, wherein the outer rotor motor 100 is connected to one axial end of the crossflow impeller.

[0088] In the above technical solution, by adopting the above outer rotor motor 100, the working stability of the fan components can be improved.

[0089] 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 of the utility model.

[0090] In the above technical solution, the performance of the air conditioner can be improved by adopting the above fan component.

[0091] In the description of the present utility model, it is necessary to understand that the terms "center", "width", "thickness", "upper", "lower", "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.

[0092] 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.

[0093] 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.

[0094] 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 a housing and a rotating shaft, the housing being rotatably covered on the outside of the stator, an annular gap being formed between the inner circumference of the housing and the outer circumference of the stator, the rotating shaft being connected to the housing and passing through the center hole; A retaining ring is provided on at least one of the stator and the housing, and the retaining ring is located at at least one end of the annular gap in the axial direction.

2. The outer rotor motor according to claim 1, characterized in that: The housing comprises: an end cover portion and an annular portion, wherein the end cover portion is arranged at one axial end of the stator, and the annular portion is arranged around the circumference of the stator; At least a portion of the annular portion is a first excitation component, and the stator includes a second excitation component coupled to the first excitation component.

3. The outer rotor motor according to claim 2, characterized in that: The retaining ring includes a first retaining ring provided on an end surface of the stator facing the end cover portion, and the first retaining ring is spaced apart from the end cover portion.

4. The outer rotor motor according to claim 3, characterized in that: The retaining ring also includes a second retaining ring, which is disposed on a surface of the end cover portion facing the stator, or on an inner circumferential surface of the annular portion. The first retaining ring and the second retaining ring are arranged radially, and the second retaining ring is spaced from the stator and the first retaining ring.

5. The outer rotor motor according to claim 3, characterized in that: The axial dimension of the retaining ring is 2-5 mm.

6. The outer rotor motor according to claim 3, characterized in that: The outer circumferential surface of the retaining ring is arranged flush with the outer circumferential surface of the stator.

7. The outer rotor motor according to any one of claims 2 to 6, 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 rotor assembly further comprises a wind wheel assembled in the mounting hole; The outer rotor motor is provided with a cooling air duct, and the cooling air duct is connected to the mounting hole.

8. The outer rotor motor according to claim 7, characterized in that: The stator comprises a bearing seat and a bearing arranged in the bearing seat, the rotating shaft is passed through the bearing seat, and the bearing is sleeved on the rotating shaft; The cooling air duct is formed on the bearing seat.

9. The outer rotor motor according to any one of claims 1 to 6, characterized in that: The retaining ring is formed on the stator by integral injection molding.

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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