Outer rotor motor, cross-flow fan and air conditioner

Abstract

The outer rotor motor comprises a stator and a rotor, the stator comprises a stator body, the rotor comprises a rotor ring and a rotor cover, the rotor ring surrounds the stator body, the rotor cover is fixedly connected to one axial end of the rotor ring, the rotor cover is provided with turbulent flow ribs, and the turbulent flow ribs are arranged on the stator body. The turbulent flow ribs are opposite to the inner ring area of the rotor ring and protrude towards the stator body, and gaps are formed between the turbulent flow ribs and the stator body. According to the external rotor motor provided by the utility model, the rotor cover is provided with the turbulent flow ribs, and the turbulent flow ribs rotate to accelerate turbulent flow and accelerate diffusion of heat of the stator body from a heat accumulation position to other areas, so that the temperature of each part of the stator body is more uniform, and the problem that the service life is shortened due to overhigh local temperature is solved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment, and in particular to an external rotor motor, a cross-flow fan, and an air conditioner. Background Technology

[0002] External rotor motors, due to their small axial dimensions, have been widely used in the air conditioning industry in recent years. The stator of an external rotor motor is located inside the rotor. In related technologies, the windings inside the stator generate heat when energized. However, since the windings are not evenly distributed throughout the stator, a large amount of heat accumulates in certain areas, causing excessively high local temperatures and affecting heat dissipation. Excessive heat accelerates stator aging and shortens the motor's lifespan. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an external rotor motor, wherein the rotor of the external rotor motor is provided with turbulence ribs. The rotation of the turbulence ribs can accelerate turbulence, making the temperature more uniform throughout the stator and improving the problem of reduced lifespan caused by excessively high local temperatures.

[0004] This utility model also proposes a cross-flow fan having the aforementioned external rotor motor.

[0005] This utility model also proposes an air conditioner having the above-mentioned cross-flow fan.

[0006] According to a first aspect of the present invention, an external rotor motor includes: a stator, the stator including a stator body; and a rotor, the rotor including a rotor ring and a rotor cover, the rotor ring surrounding the stator body, the rotor cover being fixedly connected to one axial end of the rotor ring, the rotor cover having a turbulence rib, the turbulence rib being opposite to the inner ring region of the rotor ring, the turbulence rib protruding toward the stator body and having a gap between it and the stator body.

[0007] According to the external rotor motor of this utility model, by setting turbulence ribs on the rotor cover, the rotation of the turbulence ribs can accelerate the turbulence and accelerate the diffusion of heat from the heat accumulation point to other areas of the stator body, making the temperature of the stator body more uniform and improving the problem of reduced lifespan caused by excessive local temperature. In addition, when the temperature of the stator body is uniform, it is beneficial to dissipate heat through the entire surface of the stator body, which can increase the heat dissipation area of ​​the stator body and improve the heat dissipation speed of the stator.

[0008] In some embodiments, the turbulence ribs are multiple and spaced apart circumferentially along the rotor.

[0009] In some embodiments, the turbulence ribs are formed as strips extending from the axis of the rotor toward the edge of the rotor cover.

[0010] In some embodiments, each of the baffle ribs has the same specifications and the plurality of baffle ribs are evenly spaced along the circumference of the rotor.

[0011] In some embodiments, the ribs are formed as straight ribs extending in a straight line along the radial direction of the rotor.

[0012] In some embodiments, the stator further includes a mounting portion located on the outside of the rotor ring at an axial direction away from the rotor cover and fixedly connected to the shaft end of the stator body. The external rotor motor further includes a stator cover, the mounting portion being fixedly mounted on the stator cover, the stator cover being disposed outside the mounting portion, and the stator cover having heat dissipation holes.

[0013] In some embodiments, the stator cover includes an annular ring and a cover end cap. The annular ring surrounds the mounting portion around the stator circumferentially, and the cover end cap covers the shaft end of the annular ring away from the rotor. The cover end cap has the heat dissipation holes.

[0014] In some embodiments, the axis of the stator is horizontally arranged, and the portion of the end cover located below the central horizontal plane of the stator and the portion located above the central horizontal plane are both provided with the heat dissipation holes.

[0015] In some embodiments, the end cap has a plurality of hole rows, each hole row including a plurality of heat dissipation holes arranged radially spaced along the stator, and the plurality of hole rows arranged circumferentially spaced along the stator.

[0016] In some embodiments, the rotor further includes a rotating shaft connected to the rotor cover and located at the center of the rotor ring, and the stator further includes a bearing disposed within the stator body and sleeved outside the rotating shaft, and the bearing has a heat dissipation structure formed on it.

[0017] In some embodiments, the heat dissipation structure includes a heat dissipation groove disposed on the outer surface of the bearing facing the stator body and open in the direction toward the stator body.

[0018] In some embodiments, the bearing includes a bearing body and a bearing housing. The bearing body is disposed within the bearing housing and engages with the rotating shaft. The center of the stator body has an axially extending shaft hole. The bearing housing is installed within the shaft hole. The heat dissipation groove is disposed on the bearing housing and opens toward the wall of the shaft hole.

[0019] In some embodiments, the bearing housing is cylindrical, and the heat dissipation grooves extend axially along the bearing housing and are multiple and spaced apart circumferentially along the bearing housing.

[0020] In some embodiments, the bearing body is a sliding bearing, and the rotating shaft is rotatably clearance-fitted with the sliding bearing.

[0021] According to a second aspect of the present invention, a cross-flow fan includes a wind turbine and a motor. The wind turbine is a cross-flow wind turbine, and the motor is an external rotor motor according to a first aspect of the present invention. The motor is located at one axial end of the wind turbine, and the rotor is coaxially arranged and fixedly connected to the wind turbine.

[0022] According to the present invention, by setting the external rotor motor of the first aspect, the stator heats up faster, which is beneficial to extending the service life of the external rotor motor and also beneficial to reducing the axial length of the cross-flow fan.

[0023] An air conditioner according to a third aspect of the present invention includes: a fan and a chassis, wherein the fan is a cross-flow fan according to the second aspect described above and is mounted on the chassis.

[0024] According to the present invention, by incorporating a cross-flow fan as described in the second aspect of the present invention, the operational reliability of the air conditioner can be improved.

[0025] In some embodiments, the air conditioner is a wall-mounted air conditioner, and the axis of the cross-flow fan is in the left-right direction.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Figure 1 This is an exploded view of the structure of an external rotor motor according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of an external rotor motor according to an embodiment of the present invention;

[0029] Figure 3 This is a front view of a rotor according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of an external rotor motor according to an embodiment of the present invention;

[0031] Figure 5 This is a front view of the end cap according to an embodiment of the present utility model;

[0032] Figure 6 This is a schematic diagram of the structure of a bearing according to an embodiment of the present invention;

[0033] Figure 7This is a cross-sectional view of the bearing and stator body according to an embodiment of the present invention;

[0034] Figure 8 This is an exploded view of the structure of a bearing according to an embodiment of the present invention;

[0035] Figure 9 This is an exploded view of a portion of the structure of a cross-flow wind turbine according to an embodiment of the present invention;

[0036] Figure 10 This is a partial structural diagram of an air conditioner according to the present invention.

[0037] Figure label:

[0038] Air conditioner 1000;

[0039] Fan 100; Cross-flow fan 100a;

[0040] External rotor motor 10;

[0041] Stator 1; Stator body 11; Shaft hole 111; Mounting part 12; Bearing 13; Heat dissipation structure 13a; Heat dissipation groove 13a1; Bearing body 131; Bearing seat 132; Rib 13b;

[0042] Rotor 2; Rotor ring 21; Rotor cover 22; Turbine rib 23; Shaft 24;

[0043] Stator cover 3; annular ring 31; cover end cap 32; heat dissipation hole 321; hole row 32a;

[0044] Wind turbine 40; Cross-flow wind turbine 40a;

[0045] Chassis 500. Detailed Implementation

[0046] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0048] The external rotor motor 10 of the first aspect of this utility model is described below with reference to the accompanying drawings.

[0049] According to the embodiment of the present utility model, the external rotor motor 10, such as Figure 1 and Figure 2 As shown, the external rotor motor 10 includes a stator 1 and a rotor 2. The stator 1 includes a stator body 11, and the rotor 2 includes a rotor ring 21 and a rotor cover 22. The rotor ring 21 surrounds the stator body 11, and the rotor cover 22 is fixed to one axial end of the rotor ring 21. The rotor cover 22 has a turbulence rib 23, which is opposite to the inner ring area of ​​the rotor ring 21. The turbulence rib 23 protrudes toward the stator body 11 and has a gap with the stator body 11.

[0050] The rotor ring 21 can be a magnetic ring, and the stator body 11 can include a stator core and stator coils. When the external rotor motor 10 is energized, the magnetic field generated by the stator 1 and the magnetic field generated by the rotor 2 interact, allowing the rotor 2 to rotate relative to the stator 1. The stator body 11 of the external rotor motor 10 is located inside the rotor ring 21, and the rotor ring 21 surrounds the stator body 11. Compared with the internal rotor motor, the axial dimension of the external rotor motor 10 is shorter, which is beneficial for the arrangement and assembly of the external rotor motor 10.

[0051] The rotor cover 22 is fixedly connected to one axial end of the rotor ring 21. A turbulence rib 23 is provided on the side of the rotor cover 22 facing the rotor ring 21. The turbulence rib 23 is opposite to the inner ring area of ​​the rotor ring 21. The turbulence rib 23 will not interfere with the rotor ring 21. The turbulence rib 23 protrudes towards the stator body 11 and has a reduced distance from the stator body 11. The turbulence rib 23 will not interfere with the stator body 11 and will not affect the normal operation of the external rotor motor 10.

[0052] In related technologies, heat is generated when electricity is applied to parts of the stator body. Large amounts of heat accumulate in certain areas of the stator body, causing the local temperature of the stator body to become too high, which affects the heat dissipation rate. Excessive heat will accelerate the aging of the stator and shorten the service life of the motor.

[0053] For example, the stator body 11 may include a stator core, a stator coil, and a retaining element. The stator core and the stator coil form a stator assembly, and the retaining element encloses the stator assembly and defines the outer peripheral surface of the stator body 11. However, the temperature at the stator core and the stator coil will accumulate, causing the local temperature of the stator body to be too high.

[0054] The external rotor motor 10 of this utility model provides turbulence ribs 23 on the rotor cover 22. When the external rotor motor 10 is working, the rotor 2 rotates relative to the stator 1, and the turbulence ribs 23 rotate relative to the stator 1, stirring the airflow. This can accelerate the turbulence and accelerate the diffusion of heat from the heat accumulation point of the stator body 11 to other areas, making the temperature of the stator body 11 more uniform and improving the problem of reduced lifespan caused by excessive local temperature.

[0055] Furthermore, the temperature is uniform throughout the stator body 11, and heat is dissipated through the entire surface of the stator body 11. Compared to the stator body 11 where the local temperature is too high and heat can only be dissipated through a local area, the heat dissipation area of ​​the stator body 11 can be increased, which is beneficial to improving the heat dissipation speed of the stator body 11.

[0056] According to the embodiment of the present invention, the external rotor motor 10 has turbulence ribs 23 provided on the rotor cover 22. The rotation of the turbulence ribs 23 can accelerate the turbulence and accelerate the diffusion of heat from the heat accumulation point to other areas of the stator body 11, making the temperature of the stator body 11 more uniform and improving the problem of reduced lifespan caused by excessively high local temperatures. In addition, when the temperature of the stator body 11 is uniform, it is beneficial to dissipate heat through the entire surface of the stator body 11, which can increase the heat dissipation area of ​​the stator body 11 and improve the heat dissipation speed of the stator 1.

[0057] In some embodiments of this utility model, such as Figure 3 As shown, there are multiple turbulence ribs 23, which are spaced apart circumferentially along the rotor 2. By setting multiple turbulence ribs 23, the turbulence can be accelerated, which is beneficial to improving the heat diffusion rate of the stator body 11.

[0058] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the turbulence rib 23 is formed as a strip-shaped rib extending from the axis of the rotor 2 to the edge of the rotor cover 22.

[0059] The turbulence rib 23 extends from the center of the rotor cover 22 to the edge of the rotor cover 22, thereby increasing the turbulence coverage of the turbulence rib 23 and improving the turbulence effect of the turbulence rib 23.

[0060] Optionally, the baffle rib 23 can be a straight strip extending in a straight line; or, alternatively, the baffle rib 23 can also be a curved strip extending in a curve. For example, when the baffle rib 23 is a straight strip, it can extend radially along the rotor 2 or extend at an angle to the radial direction of the rotor 2. For example, when the baffle rib 23 is a curved strip, it can be an arc-shaped rib or an S-shaped rib, etc.

[0061] In some embodiments of this utility model, such as Figure 3 As shown, each rib 23 has the same specifications and multiple ribs 23 are evenly spaced along the circumference of the rotor 2.

[0062] Rotor 2 rotates relative to stator 1. Ideally, the center of rotor 2 and the axis of stator 1 should be on the same straight line. Therefore, the specifications of the turbulence ribs 23 are consistent and they are evenly distributed along the circumference of rotor 2, so that the overall mass distribution of rotor 2 is uniform, thereby improving the rotational stability of rotor 2.

[0063] In some embodiments of this utility model, such as Figure 3 As shown, the strip ribs are formed as straight ribs extending in a straight line along the radial direction of the rotor 2.

[0064] The ribs are straight, which reduces manufacturing difficulty, and the center of mass of straight ribs is easier to determine, which is beneficial for positioning the center of mass of the ribs on the rotor cover 22.

[0065] In some embodiments of this utility model, such as Figure 2 As shown, the stator 1 also includes a mounting portion 12, which is located on the outer side of the rotor ring 21 axially away from the rotor cover 22 and is fixedly connected to the shaft end of the stator body 11. Figure 1 and Figure 2 As shown, the external rotor motor 10 also includes: a stator cover 3, a mounting part 12 is fixedly mounted on the stator cover 3, the stator cover 3 covers the mounting part 12, and the stator cover 3 is provided with heat dissipation holes 321.

[0066] The mounting part 12 is fixedly connected to the end of the stator body 11 away from the rotor 2. The stator 1 is fixedly connected to the stator cover 3 through the mounting part 12. The stator cover 3 then fixes the stator 1 to other structures, thereby playing the role of fixing the stator 1 in place.

[0067] The stator cover 3 is located on the side of the stator body 11 away from the rotor 2. By opening heat dissipation holes 321 on the stator cover 3, air can come into contact with the stator body 11 through the heat dissipation holes 321 to exchange heat, which can improve the heat dissipation speed of the stator body 11.

[0068] In some embodiments of the present invention, the external rotor motor 10 can accelerate the heat dissipation of the part of the stator body 11 near the rotor 2 by providing turbulence ribs 23 on the rotor cover 22; and can accelerate the heat dissipation of the part of the stator body 11 away from the rotor 2 by opening heat dissipation holes 321 on the stator cover 3, thereby further improving the heat dissipation effect of the stator 1 and improving the working reliability of the external rotor motor 10.

[0069] It is understandable that the external rotor motor 10 is a driving component. In use, the stator 1 is usually fixed, and the rotor 2 is connected to the driven component to drive the driven component to rotate. Therefore, the axial side of the stator body 11 facing the rotor 2 is relatively closed. By setting the turbulence ribs 23 on the rotor cover 22 to accelerate the turbulence, the heat dissipation rate of the part of the stator body 11 facing the rotor 2 is improved. On the other hand, the axial side of the stator body 11 away from the rotor 2 is relatively open. Therefore, heat dissipation holes 321 are set on the stator cover 3 to accelerate the heat dissipation of the part of the stator body 11 away from the rotor 2 by utilizing air flow.

[0070] In some embodiments of this utility model, the stator 1 is provided with an airflow channel that can pass through along the axial direction, connecting the part of the stator 1 facing the rotor 2 and the part of the stator 1 away from the rotor 2, so that the turbulence rib 23 and the heat dissipation hole 321 can cooperate with each other to accelerate the heat dissipation of the stator 1.

[0071] The airflow disturbed by the rotation of the baffle 23 can flow through the airflow channel through the stator 1 to the side of the stator 1 away from the rotor 2, and connect with the outside of the external rotor motor 10 through the heat dissipation hole 321, thereby forming a complete airflow path, so that the airflow can be discharged after exchanging heat with the stator 1, and the heat dissipation of the stator 1 can be accelerated through air heat exchange.

[0072] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the stator cover 3 includes an annular ring 31 and a cover end cover 32. The annular ring 31 surrounds the mounting part 12 around the stator 1 in the circumferential direction. The cover end cover 32 is placed on the shaft end of the annular ring 31 away from the rotor 2. The cover end cover 32 has heat dissipation holes 321.

[0073] An annular ring 31 surrounds the stator 1, and a cover end 32 is disposed at the axial end of the stator 1, connected to the side of the annular ring 31 away from the rotor 2. The cover end 32 and the annular ring 31 together limit the movement of the stator 1, thereby improving the installation stability of the stator 1.

[0074] By providing heat dissipation holes 321 on the end cover 32, the air flowing into the stator cover 3 from the heat dissipation holes 321 comes into contact with the axial end face of the stator 1. The area of ​​contact between the stator 1 and the air is large, which can improve the heat dissipation speed of the stator 1.

[0075] In some embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the axis of the stator 1 is set horizontally, and the portion of the end cover 32 located below the central horizontal plane of the stator 1 and the portion located above the central horizontal plane are provided with heat dissipation holes 321.

[0076] Understandably, hot air will rise naturally. By providing heat dissipation holes 321 on both the portion of the end cover 32 below and above the center horizontal plane of the stator 1, when the stator 1 generates heat during operation, it heats the surrounding air. The hot air flows out from the higher heat dissipation holes 321 on the end cover 32, while the cooler air outside the external rotor motor 10 flows into the motor cover from the lower heat dissipation holes 321 on the end cover 32 under the action of air pressure to dissipate heat from the stator 1, thereby increasing the heat dissipation speed of the stator 1.

[0077] In some embodiments of this utility model, such as Figure 5 As shown, the end cover 32 has a plurality of hole rows 32a, each hole row 32a including a plurality of heat dissipation holes 321 arranged radially at intervals along the stator 1, and the plurality of hole rows 32a arranged circumferentially at intervals along the stator 1.

[0078] By setting multiple heat dissipation holes 321, the airflow area can be increased, the airflow for heat exchange with stator 1 can be increased, which is beneficial to improving the heat dissipation speed of stator 1.

[0079] like Figure 5 As shown, the heat dissipation holes 321 radiate from the center of the end cover 32 to the edge on the end cover 32. In actual use, the number and position of the heat dissipation holes 321 can also be changed.

[0080] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the rotor 2 also includes a rotating shaft 24, which is connected to the rotor cover 22 and located at the center of the rotor ring 21. The stator 1 also includes a bearing 13, which is located inside the stator body 11 and sleeved outside the rotating shaft 24. Figure 6 As shown, a heat dissipation structure 13a is formed on the bearing 13.

[0081] The bearing 13 is installed inside the stator body 11, and the rotating shaft 24 extends into the bearing 13 and is rotatably engaged with the bearing 13, thereby improving the rotational stability between the rotor 2 and the stator 1.

[0082] In related technologies, after the motor is powered on, the stator body 11 will generate heat, which is directly transferred to the rotating shaft 24 inside the stator body 11. Excessive heat will accelerate the aging of the bearing 13 and shorten the service life of the motor.

[0083] Therefore, a heat dissipation structure 13a is formed on the bearing 13. The heat dissipation structure 13a can transfer the heat transferred from the stator 1 to the bearing 13, which can accelerate the heat dissipation of the bearing 13, thereby slowing down the aging rate of the bearing 13 and helping to extend the service life of the motor. Furthermore, by setting the heat dissipation structure 13a on the bearing 13, it is also beneficial to the heat dissipation of the stator 1, which can reduce the occurrence of motor overheating failure and improve the operational reliability of the motor.

[0084] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the heat dissipation structure 13a includes a heat dissipation groove 13a1, which is disposed on the outer surface of the bearing 13 facing the stator body 11 and is open in the direction of the stator body 11.

[0085] The heat dissipation structure 13a includes a heat dissipation groove 13a1. By providing the heat dissipation groove 13a1 on the surface of the bearing 13, a gap can be formed between the bearing 13 and the stator body 11, which can reduce the contact area between the bearing 13 and the stator body 11. The gap allows airflow to pass through, thereby accelerating the heat dissipation of the bearing 13 by increasing the heat exchange efficiency between the stator body 11 and the bearing 13 and the air.

[0086] In some embodiments of this utility model, such as Figure 6 As shown, the outer surface of the bearing 13 has a rib 13b. The rib 13b extends along the axial direction of the bearing 13. There are multiple ribs 13b and they are spaced apart in the circumferential direction. A heat dissipation groove 13a1 is defined between adjacent circumferential ribs 13b.

[0087] In some embodiments of this utility model, the heat dissipation groove 13a1 extends from the side of the bearing 13 away from the rotor cover 22 to the side of the bearing 13 near the rotor cover 22.

[0088] The longer length of the heat dissipation groove 13a1 increases the gap between the bearing 13 and the stator body 11, thereby increasing the airflow and improving the heat dissipation speed of the bearing 13. Furthermore, the heat dissipation groove 13a1 is formed as a through groove, connecting the part of the stator 1 facing the rotor 2 and the part of the stator 1 away from the rotor 2, so that the baffle rib 23 and the heat dissipation hole 321 can cooperate with each other to accelerate the heat dissipation of the stator 1.

[0089] The airflow disturbed by the rotation of the baffle 23 can flow to the side of the stator 1 away from the rotor 2 through the heat dissipation groove 13a1, and connect with the outside of the external rotor motor 10 through the heat dissipation hole 321, thereby forming a complete airflow path, so that the airflow is discharged after exchanging heat with the stator 1, thereby improving the heat dissipation speed of the stator 1.

[0090] In some embodiments of this utility model, such as Figure 2 and Figure 8As shown, the bearing 13 includes a bearing body 131 and a bearing housing 132. The bearing body 131 is disposed in the bearing housing 132 and cooperates with the rotating shaft 24. The center of the stator body 11 has a shaft hole 111 extending axially. The bearing housing 132 is installed in the shaft hole 111. The heat dissipation groove 13a1 is disposed on the bearing housing 132 and is open towards the hole wall of the shaft hole 111.

[0091] The bearing body 131 is housed within the bearing housing 132. The bearing body 131 mates with the rotating shaft 24. The rotating shaft 24 extends into the bearing 13, which improves the rotational stability of the rotor 2 relative to the stator 1 and reduces the displacement of the rotor 2 relative to the stator 1. The bearing housing 132 is installed in the shaft hole 111 of the stator 1 and mates with the stator 1. Therefore, the heat dissipation groove 13a1 is provided on the bearing housing 132, which reduces the contact area between the bearing housing 132 and the stator 1, reduces the heat transfer from the stator 1 to the bearing 13, and improves the heat dissipation rate of the bearing housing 132.

[0092] The bearing 13 comprises two parts, allowing the bearing body 131 and the bearing housing 132 to be made of different materials, facilitating flexible design. For example, the bearing housing 132 is made of rubber, which reduces vibration, supports the rotation of the bearing body 131, and helps reduce wear; the bearing body 131 can be made of plastic to improve operational stability and reduce wear.

[0093] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the bearing housing 132 is cylindrical, and the heat dissipation grooves 13a1 extend along the axial direction of the bearing housing 132 and are multiple and spaced apart along the circumference of the bearing housing 132.

[0094] By setting multiple heat dissipation slots 13a1, the contact area between air and bearing 13 can be increased, accelerating the heat dissipation of bearing 13; and by setting multiple heat dissipation slots 13a1 at intervals in the circumferential direction, it is beneficial to position the center of gravity of bearing 13 and improve the working stability of bearing 13.

[0095] In some embodiments of this utility model, such as Figure 2 and Figure 8 As shown, the bearing body 131 is a sliding bearing, and the rotating shaft 24 is rotatably fitted with the sliding bearing with a clearance.

[0096] The rotating shaft 24 is inserted into the sliding bearing and has a clearance fit with the sliding bearing. Compared with setting the bearing body as a rolling bearing, the assembly of the rotating shaft 24 and the sliding bearing is faster, which is conducive to improving assembly efficiency and production efficiency.

[0097] In some embodiments of this utility model, the bearing housing 132 is a vibration damping material, which can reduce vibration and is beneficial to reducing wear.

[0098] Furthermore, the bearing housing 132 is made of vibration damping material, and the bearing housing 132 can undergo elastic deformation, which facilitates the installation of the bearing housing 132 onto the stator body 11 and can improve the connection stability after the bearing housing 132 is assembled.

[0099] The second aspect of this utility model, a cross-flow fan 100a, is described below with reference to the accompanying drawings.

[0100] According to the embodiment of the present utility model, the cross-flow fan 100a, such as Figure 9 As shown, the cross-flow fan 100a includes: a fan wheel 40 and a motor. The fan wheel 40 is a cross-flow fan wheel 40a, and the motor is an external rotor motor 10 according to the first aspect of this utility model. The motor is located at one axial end of the fan wheel 40, and the rotor 2 is fixedly connected to the fan wheel 40.

[0101] The external rotor motor 10 drives the cross-flow fan 40a to rotate, thereby generating airflow. Compared with the traditional internal rotor motor, the external rotor motor 10 has a shorter axial dimension, which facilitates the assembly and use of the cross-flow fan 100a.

[0102] According to the cross-flow fan 100a of the present invention, by setting the external rotor motor 10 of the first aspect of the present invention, the stator 1 has a faster heat dissipation speed, which is beneficial to extending the service life of the external rotor motor 10.

[0103] The air conditioner 1000 of the third aspect of this utility model is described below with reference to the accompanying drawings.

[0104] According to an embodiment of the present utility model, the air conditioner 1000, such as Figure 10 As shown, the air conditioner 1000 includes a fan 100 and a chassis 500. The fan 100 is a cross-flow fan 100a according to the second aspect of the present invention and is installed on the chassis 500.

[0105] According to the embodiment of the present invention, the air conditioner 1000 can improve its operational reliability by providing a cross-flow fan 100a according to the second aspect of the present invention.

[0106] In some embodiments of this utility model, the stator 1 is fixed to the chassis 500 by the stator cover 3.

[0107] The stator 1 is fixedly installed on the stator cover 3, which is fixedly connected to the chassis 500, thereby fixing the stator 1 and the chassis 500 relatively. After the stator 1 and the chassis 500 are stably installed, it is beneficial to improve the coaxiality of the rotor 2 and the stator 1, improve the reliability of the rotational cooperation between the rotor 2 and the stator 1, reduce the friction between the rotor 2 and the stator 1, reduce the oscillation of the stator 1, and also improve the working stability of the air conditioner 1000.

[0108] In some embodiments of this utility model, such as Figure 10As shown, air conditioner 1000 is a wall-mounted air conditioner, and the axis of the cross-flow fan 40a is in the left-right direction.

[0109] Air conditioner 1000 is a wall-mounted air conditioner, which is convenient for use in environments with limited space. By setting the aforementioned cross-flow fan 40a, the space occupied by the wall-mounted air conditioner in the left and right directions can be reduced, which helps to reduce the size of air conditioner 1000 and facilitates the placement and use of air conditioner 1000.

[0110] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0111] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0112] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0113] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0114] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0115] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An external rotor motor, characterized in that, include: Stator, the stator comprising a stator body; The rotor includes a rotor ring and a rotor cover. The rotor ring surrounds the stator body, and the rotor cover is fixed to one axial end of the rotor ring. The rotor cover has a turbulence rib, which is opposite to the inner ring region of the rotor ring. The turbulence rib protrudes toward the stator body and has a gap with the stator body.

2. The external rotor motor according to claim 1, characterized in that, The turbulence ribs are multiple and spaced apart along the circumference of the rotor.

3. The external rotor motor according to claim 2, characterized in that, The turbulence ribs are formed as strip-shaped ribs extending from the axis of the rotor toward the edge of the rotor cover.

4. The external rotor motor according to claim 3, characterized in that, Each of the aforementioned baffles has the same specifications and the plurality of the aforementioned baffles are evenly spaced along the circumference of the rotor.

5. The external rotor motor according to claim 3, characterized in that, The ribs are formed as straight ribs extending in a straight line along the radial direction of the rotor.

6. The external rotor motor according to claim 1, characterized in that, The stator further includes a mounting portion, which is located on the outer end of the rotor ring away from the rotor cover along the axial direction and is fixedly connected to the shaft end of the stator body. The external rotor motor further includes: The stator cover is fixedly installed on the mounting part, the stator cover is provided outside the mounting part, and the stator cover is provided with heat dissipation holes.

7. The external rotor motor according to claim 6, characterized in that, The stator cover includes an annular ring and a cover end cap. The annular ring surrounds the mounting portion around the stator circumferentially, and the cover end cap is disposed on the shaft end of the annular ring away from the rotor. The cover end cap has the heat dissipation holes.

8. The external rotor motor according to claim 7, characterized in that, The stator's axis is horizontally positioned, and the portion of the end cover located below the central horizontal plane of the stator and the portion located above the central horizontal plane are both provided with heat dissipation holes.

9. The external rotor motor according to claim 7, characterized in that, The end cap has multiple rows of holes, each row of holes including multiple heat dissipation holes spaced radially along the stator, and the multiple rows of holes spaced circumferentially along the stator.

10. The external rotor motor according to claim 1, characterized in that, The rotor also includes a rotating shaft, which is connected to the rotor cover and located at the center of the rotor ring. The stator also includes a bearing, which is disposed within the stator body and sleeved outside the rotating shaft. A heat dissipation structure is formed on the bearing.

11. The external rotor motor according to claim 10, characterized in that, The heat dissipation structure includes a heat dissipation groove, which is disposed on the outer surface of the bearing facing the stator body and is open in the direction of the stator body.

12. The external rotor motor according to claim 11, characterized in that, The bearing includes a bearing body and a bearing housing. The bearing body is disposed in the bearing housing and cooperates with the rotating shaft. The center of the stator body has a shaft hole extending axially. The bearing housing is installed in the shaft hole. The heat dissipation groove is disposed on the bearing housing and is open towards the hole wall of the shaft hole.

13. The external rotor motor according to claim 12, characterized in that, The bearing housing is cylindrical, and the heat dissipation grooves extend along the axial direction of the bearing housing and are multiple and spaced apart along the circumference of the bearing housing.

14. The external rotor motor according to claim 12, characterized in that, The bearing body is a sliding bearing, and the rotating shaft is rotatably clearance-fitted with the sliding bearing.

15. A cross-flow fan, characterized in that, include: The wind turbine and the motor are provided, wherein the wind turbine is a cross-flow wind turbine, and the motor is an external rotor motor according to any one of claims 1-14. The motor is located at one axial end of the wind turbine, and the rotor is coaxially arranged and fixedly connected to the wind turbine.

16. An air conditioner, characterized in that, include: A fan and a chassis, wherein the fan is a cross-flow fan according to claim 15 and is mounted on the chassis.

17. The air conditioner according to claim 16, characterized in that, The air conditioner is a wall-mounted air conditioner, and the axis of the cross-flow fan is in the left-right direction.

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