Outer rotor motor, cross-flow fan and air conditioner

Abstract

The utility model discloses an external rotor motor, a cross-flow fan and an air conditioner, the external rotor motor comprises a motor body and a motor cover, the motor body comprises a rotor and a stator, the rotor comprises a rotor ring, and at least part of the stator extends into the rotor ring; the stator is fixedly installed on the motor cover, the motor cover comprises an annular ring and a cover end cover, the annular ring surrounds the motor body in the circumferential direction of the motor body, and the cover end cover is arranged on one axial side of the motor body and covers an opening in the axial side of the annular ring. The cover end cover and the annular ring jointly define a wire passing opening, and a wire bunching structure is arranged on the side, away from the motor body, of the cover end cover. Therefore, the wiring direction of the connecting wire can be limited, so that the connecting wire and the motor cover are easy to keep relatively static, and the connection stability between the motor body and the connecting wire can be improved.

Description

Technical Field

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

[0002] In some external rotor motors in related technologies, the motor wires need to extend from the motor housing and connect to the power supply, etc. However, due to environmental vibration and other factors, the reliability of the connection between the motor wires and the motor body inside the motor housing will be affected and needs to be improved. 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, in which the connecting wires and the motor housing are easily kept relatively stationary, and the connection stability between the motor body and the connecting wires is high, thus improving the reliability of the external rotor motor.

[0004] An external rotor motor according to an embodiment of the present invention includes: a motor body, the motor body including a rotor and a stator, the rotor including a rotor ring, at least a portion of the stator extending into the rotor ring; a motor cover, the stator being fixedly mounted on the motor cover, the motor cover including an annular ring and a cover end cap, the annular ring surrounding the motor body circumferentially, the cover end cap being disposed on one axial side of the motor body and covering the axial opening of the annular ring, the cover end cap and the annular ring together defining a wire passage, and a wire harness structure being provided on the side of the cover end cap opposite to the motor body.

[0005] According to the embodiment of the present invention, the external rotor motor has a wire harness structure on the side of the end cover away from the motor body. The wire harness structure can be used to fix the connecting wires of the stator on the end cover to restrict the routing direction of the connecting wires. The connecting wires and the motor cover can easily remain relatively stationary, which can improve the connection stability between the motor body and the connecting wires and improve the reliability of the external rotor motor.

[0006] In some embodiments, the cable pass is located at the outer peripheral edge of the motor cover.

[0007] In some embodiments, the axis of the motor body is perpendicular to the direction of gravity, and the cable passage is located at the lower part of the motor cover in the direction of gravity.

[0008] In some embodiments, in the axial projection of the external rotor motor, the line connecting the axis of the wire passage and the axis of the motor cover is a first line, and the angle α between the first line and the direction of gravity is less than or equal to 30°.

[0009] In some embodiments, in the axial projection of the external rotor motor, a vertical baseline extending along the direction of gravity is drawn through the axis of the motor cover, and the lowest point of the line opening is lower than or level with the lowest point where the vertical baseline intersects the motor cover.

[0010] In some embodiments, the edge of the annular ring has a first mating portion, and the edge of the end cap has a second mating portion. The first mating portion protrudes from the outer peripheral surface of the annular ring, and the second mating portion protrudes from the outer peripheral surface of the end cap. The wire passage is defined by the first mating portion and the second mating portion and is located at the end of the first mating portion and the second mating portion away from the axis of the motor cover.

[0011] In some embodiments, the end cap extends into the annular ring, the peripheral wall of the annular ring surrounds the peripheral wall of the end cap, the first mating portion defines a mating groove, the mating groove is open on the side of the motor body facing the end cap in the axial direction, and the second mating portion is embedded in the mating groove from the open side of the mating groove.

[0012] In some embodiments, the second mating portion defines a wire passage groove, which is open on the side of the motor body facing the first mating portion in the axial direction. A wire passage channel is formed between the wire passage groove and the mating groove, and the wire passage channel connects the interior of the motor cover with the wire passage opening.

[0013] In some embodiments, the annular ring includes an arc segment and a clearance segment continuously arranged along the circumference of the motor body. In the axial projection of the external rotor motor, the outer contour of the arc segment is a superior arc, the outer contour of the clearance segment is located within the range enclosed by the base circle line where the outer contour of the arc segment is located, and a clearance area is left between the clearance segment and the base circle line. The wire passage protrudes outside the arc segment.

[0014] In some embodiments, the axis of the motor body is perpendicular to the direction of gravity, the wire passage is located at the lower part of the motor cover in the direction of gravity, and in the axial projection of the outer rotor motor, a transverse baseline perpendicular to the direction of gravity is drawn through the axis of the motor cover. The wire harness structure is lower than the transverse baseline and higher than the wire passage.

[0015] In some embodiments, in the axial projection of the external rotor motor, a vertical baseline extending along the direction of gravity is drawn through the axis of the motor cover, and the wire harness structure and the wire passage are located on the same side of the vertical baseline.

[0016] In some embodiments, the wire harness structure is formed as a wire buckle, which first extends axially outward from the motor housing and then extends upward.

[0017] In some embodiments, the stator includes a stator body and a limiting protrusion. The limiting protrusion is located at one end of the stator body near the end cap and protrudes from the outer circumferential surface of the stator body. A limiting groove is formed inside the annular ring. The limiting groove is open on the side of the motor body facing the end cap in the axial direction to form a slot, and a bottom wall is formed on the side away from the end cap. A vibration damping sleeve is provided outside the limiting protrusion. The vibration damping sleeve at least covers the two axial end faces of the limiting protrusion. The limiting protrusion and the vibration damping sleeve extend from the slot into the limiting groove along the axial direction of the stator and are clamped between the end cap and the bottom wall of the groove along the axial direction of the motor body. The wire passage and the limiting protrusion are spaced apart along the circumferential direction of the motor body.

[0018] In some embodiments, the limiting protrusions are multiple and spaced apart along the circumference of the motor body, the limiting grooves are multiple and correspond one-to-one with the multiple limiting protrusions, the vibration damping sleeve also covers the radial outer surface and the two circumferential sides of the limiting protrusions; and / or, the end cap and the annular ring are engaged by a snap-fit ​​structure and fixedly connected by fasteners.

[0019] This utility model also proposes a cross-flow fan.

[0020] The cross-flow fan according to an embodiment of the present utility model includes a cross-flow impeller and an external rotor motor according to any of the above embodiments. The external rotor motor is disposed at one axial end of the cross-flow impeller, and the rotor ring is coaxially arranged and fixedly connected to the cross-flow impeller.

[0021] According to the embodiments of the present invention, the cross-flow fan has high connection stability between the stator and the connecting wires, and good reliability of the external rotor motor, which helps to improve the overall performance of the cross-flow fan.

[0022] This utility model proposes another type of air conditioner.

[0023] An air conditioner according to an embodiment of the present invention includes: an air conditioner body and a cross-flow fan according to any of the above embodiments, wherein the external rotor motor is fixedly installed on the air conditioner body through the motor cover.

[0024] According to the embodiment of the present invention, the air conditioner has high connection stability between the stator and the connecting wires, and good reliability of the external rotor motor, which helps to improve the overall performance of the cross-flow fan and enhance the product competitiveness of the air conditioner.

[0025] In some embodiments, the annular ring includes an arc segment and a clearance segment continuously arranged circumferentially along the motor body. In the axial projection of the external rotor motor, the outer contour of the arc segment is a superior arc, and the outer contour of the clearance segment is located within the range enclosed by the base circle line where the outer contour of the arc segment is located, and a clearance area is left between the clearance segment and the base circle line. The air conditioner is a wall-mounted air conditioner, the air conditioner body includes a chassis, a cross-flow fan with its axis in the left-right direction, the motor cover is mounted on the chassis, the clearance segment is located on the rear side of the motor cover, the chassis includes a chassis back plate located on the rear side of the cross-flow fan, the chassis back plate is recessed into the clearance area at the location corresponding to the clearance segment to define a clearance space that intrudes forward into the front side of the rear surface of the chassis back plate, and a refrigerant pipe passes through the clearance space.

[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] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a cross-sectional view of a cross-flow fan according to some embodiments of the present invention;

[0029] Figure 2 This is a schematic diagram of an external rotor motor according to some embodiments of the present invention;

[0030] Figure 3 This is an exploded view of an external rotor motor according to some embodiments of the present invention;

[0031] Figure 4 This is a schematic diagram showing the fit between the motor cover and the connecting wires according to some embodiments of the present utility model;

[0032] Figure 5 This is an isometric view of the annular ring according to some embodiments of the present invention;

[0033] Figure 6 This is a schematic diagram of the end cap according to some embodiments of the present utility model;

[0034] Figure 7 This is a front view of a motor cover according to some embodiments of the present invention;

[0035] Figure 8 This is a partial schematic diagram of an air conditioner according to some embodiments of the present utility model;

[0036] Figure 9This is a partial exploded view of an air conditioner according to some embodiments of the present invention;

[0037] Figure 10 This is a cross-sectional schematic diagram of the chassis according to some embodiments of the present utility model.

[0038] Figure label:

[0039] Air conditioner 1000; vertical baseline H; horizontal baseline L; first connecting line S; lowest point P1 at the line opening; lowest point P2 where the vertical baseline intersects the motor cover;

[0040] Cross-flow fan 100; Air conditioner body 200; Chassis 201; Chassis back panel 2011; Space clearance 2012; Cover 300;

[0041] External rotor motor 1; Motor body 10;

[0042] Rotor 11; Rotor ring 111; Shaft 112;

[0043] Stator 12; Stator body 121; Limiting protrusion 122; Shaft hole 123; Sliding bearing 124;

[0044] Motor cover 13; annular ring 131; arc segment 1311; clearance segment 1312; snap-fit ​​groove 1313; first connecting part 1314; limiting groove 1315; mounting ear 1316; first mating part 1317; mating groove 13171; base circle line C1; clearance area C2;

[0045] Cover end cap 132; snap-fit ​​protrusion 1321; second connecting part 1322; second mating part 1323; wire channel 13231; wire harness structure 1324; wire buckle 1325; wire opening 133;

[0046] 14. Threaded fastener; 15. Vibration damping sleeve; 16. Snap-fit ​​structure; 17. Fastener; 18. Connecting wire; 181. Return water section;

[0047] Cross-flow wind turbine 2. Detailed Implementation

[0048] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0049] In the description of this utility model, it should be understood that the terms "axis," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] Hereinafter, with reference to the accompanying drawings, an external rotor motor 1 according to an embodiment of the present invention will be described.

[0052] like Figures 1-10 As shown, the external rotor motor 1 according to an embodiment of the present invention includes: a motor body 10 and a motor cover 13. The motor body 10 includes a rotor 11 and a stator 12. The rotor 11 includes a rotor ring 111. At least a portion of the stator 12 extends into the rotor ring 111. The stator 12 is fixedly mounted on the motor cover 13. The motor cover 13 includes an annular ring 131 and a cover end cap 132. The annular ring 131 surrounds the motor body 10 circumferentially. The cover end cap 132 is located on the axial F side of the motor body 10 and covers the axial opening of the annular ring 131. The cover end cap 132 and the annular ring 131 together define a wire passage 133. A wire harness structure 1324 is provided on the side of the cover end cap 132 away from the motor body 10.

[0053] According to the embodiment of the present invention, the external rotor motor 1 has a wire harness structure 1324 on the side of the end cover 132 away from the motor body 10. The wire harness structure 1324 can be used to fix the connecting wires 18 of the stator 12 on the end cover 132, so as to restrict the routing direction of the connecting wires 18, which is conducive to standardized wiring, so that the connecting wires 18 are less likely to interfere with other components or structures, and make it easy for the connecting wires 18 and the motor cover 13 to remain relatively stationary. This can improve the connection stability between the motor body 10 and the connecting wires 18, and improve the reliability of the external rotor motor 1.

[0054] First, such as Figures 1-4 As shown, the external rotor motor 1 includes a motor body 10 and a motor cover 13. The motor body 10 includes a rotor 11 and a stator 12. The rotor 11 includes a rotor ring 111. At least a portion of the stator 12 extends into the rotor ring 111, thereby eliminating the axial fitting clearance between the rotor 11 and the stator 12, improving the fit compactness, and facilitating a reduction in the axial dimensions of the external rotor motor 1, thus saving space.

[0055] The stator 12 has a central shaft hole 123, within which a sliding bearing 124 is disposed. A rotating shaft 112 is disposed within the rotor ring 111, and the rotating shaft 112 is fixedly connected to the rotor ring 111 (e.g., directly or indirectly). The rotating shaft 112 passes through the sliding bearing 124 and is rotatably engaged with the stator 12 via the sliding bearing 124. This allows for relative rotation between the rotor 11 and the stator 12, and reduces the difficulty of assembly, improving assembly efficiency. The rotor ring 111 can be an annular magnetic ring, and the stator 12 can include a stator core and stator windings.

[0056] The stator 12 is fixedly installed in the motor cover 13. The motor cover 13 includes an annular ring 131 and a cover end cap 132. The annular ring 131 surrounds the motor body 10 circumferentially and has an axial opening. The cover end cap 132 is located on the axial F side of the motor body 10 and covers the axial opening of the annular ring 131. The cover end cap 132 is connected to the annular ring 131 and is used to fix the stator 12 inside the motor cover 13.

[0057] The design includes a cover 132 and an annular ring 131 that together define a wire passage 133. The wire passage 133 is used to pass through the connecting wire 18 of the stator 12, which supplies power to the stator 12. A wire harness structure 1324 can be provided on the side of the cover 132 facing away from the motor body 10 to secure the connecting wire 18 to this side. This design restricts the routing direction of the connecting wire 18, facilitating standardized wiring, reducing the possibility of interference between the connecting wire 18 and other components or structures, and fixing the connecting wire 18 to the stator 12 to improve the connection stability.

[0058] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the cable pass 133 can be located at the outer peripheral edge of the motor housing 13. This allows the connecting wire 18 to be bent at the outer peripheral edge of the motor housing 13 to form a water return section 181. The water return section 181 restricts water flow along the connecting wire 18 into the motor housing 13, achieving a waterproof effect and improving the reliability of the external rotor motor 1.

[0059] In some embodiments of this utility model, such as Figure 4 As shown, the axis of the motor body 10 is perpendicular to the direction of gravity, and the cable pass 133 can be positioned at the lower part of the motor cover 13 in the direction of gravity. For example, the axis of the motor body 10 can be set as... Figure 1 The left and right directions are shown, and the direction of gravity is set as... Figure 4 The up and down directions are shown.

[0060] With the above settings, the return water section 181 of the connecting wire 18 can be located at the lower part of the motor cover 13 in the direction of gravity, which helps to improve the waterproof effect of the return water section 181 and ensures the reliability of the external rotor motor 1.

[0061] In some embodiments of this utility model, such as Figure 4 As shown, in the axial projection of the external rotor motor 1, the line connecting the axis of the cable outlet 133 and the axis of the motor cover 13 can be designated as the first connecting line S, and the angle α between the first connecting line S and the direction of gravity is set to be less than or equal to 30°. For example, the angle α between the first connecting line S and the direction of gravity can be set to 5°, 10°, 15°, 20°, 25°, 30°, etc.

[0062] With the above settings, the return water section 181 of the connecting wire 18 can be located at the bottom of the connecting wire 18, so that the liquid on the connecting wire 18 can drip directly from the return water section 181 to the bottom of the motor cover 13, thereby preventing the liquid from flowing into the motor cover 13 and improving the reliability of the external rotor motor 1.

[0063] In some embodiments of this utility model, such as Figure 4 As shown, in the axial projection of the external rotor motor 1, a vertical baseline H extending along the direction of gravity is drawn through the axis of the motor housing 13. The lowest point P1 of the wire passage 133 is lower than or level with the lowest point P2 where the vertical baseline H intersects with the motor housing 13. For example, the distance between the lowest point of the wire passage 133 and the lowest point where the vertical baseline H intersects with the motor housing 13 can be set to 3 mm.

[0064] By setting the above, the bending radius of the return water section 181 of the connecting wire 18 can be increased, which helps to improve the waterproof effect of the return water section 181 and ensures the reliability of the external rotor motor 1.

[0065] In some embodiments of this utility model, such as Figure 2 as well as Figures 4-5 As shown, the edge of the annular ring 131 has a first mating portion 1317, and the edge of the end cap 132 has a second mating portion 1323. The first mating portion 1317 protrudes from the outer peripheral surface of the annular ring 131, and the second mating portion 1323 protrudes from the outer peripheral surface of the end cap 132. The second mating portion 1323 is disposed opposite to the first mating portion 1317. The wire passage 133 is defined by the first mating portion 1317 and the second mating portion 1323, and the wire passage 133 is located at the end position of the first mating portion 1317 and the second mating portion 1323 away from the axis of the motor cover 13.

[0066] It is understandable that by setting the wire passage 133 to be jointly defined by the first mating part 1317 and the second mating part 1323, the molding difficulty of the wire passage 133 can be reduced. Furthermore, by setting the wire passage 133 at the end position of the first mating part 1317 and the second mating part 1323 away from the axis of the motor cover 13, the wire passage 133 can protrude from the outer peripheral edge of the motor cover 13, which is beneficial to increase the size of the return water section 181 of the connecting wire 18, thereby improving the waterproof effect of the return water section 181.

[0067] In some embodiments of this utility model, the end cap 132 extends into the annular ring 131, the peripheral wall of the annular ring 131 surrounds the peripheral wall of the end cap 132, the first mating part 1317 defines the mating groove 13171, the mating groove 13171 is open on the side of the motor body 10 facing the end cap 132 in the axial direction F, and the second mating part 1323 is embedded in the mating groove 13171 from the open side of the mating groove 13171.

[0068] For example, refer to Figures 2-6As shown, the end cap 132 can be matched with the annular ring 131 so that the end cap 132 can extend into the annular ring 131. The peripheral wall of the annular ring 131 surrounds the peripheral wall of the end cap 132. The first mating part 1317 defines a mating groove 13171. The mating groove 13171 passes through the peripheral wall of the annular ring 131 along the axial direction of the wire passage 133 to form a through groove.

[0069] The mating groove 13171 is open on one side of the motor body 10 facing the end cover 132 in the axial direction F. The second mating part 1323 is matched with the mating groove 13171. The second mating part 1323 can be embedded in the mating groove 13171 from the open side of the mating groove 13171, so that the first mating part 1317 and the second mating part 1323 can define the wire passage 133 at the mating groove 13171.

[0070] The above-mentioned arrangement increases the mating area between the end cap 132 and the annular ring 131, which helps to improve the installation stability of the end cap 132 and the annular ring 131, and also improves the structural stability of the wire passage 133, thereby improving the reliability of the external rotor motor 1.

[0071] In some embodiments of this utility model, such as Figures 4-5 As shown, the second mating part 1323 defines a wire passage groove 13231. The wire passage groove 13231 is open on the side of the motor body 10 facing the first mating part 1317 in the axial direction F. A wire passage channel is formed between the wire passage groove 13231 and the mating groove 13171. The wire passage channel connects the interior of the motor cover 13 with the wire passage opening 133.

[0072] The above arrangement increases the mating area between the first mating part 1317 and the second mating part 1323, which helps to improve the structural stability of the wire passage 133. Furthermore, the size of the wire passage 133 can be adjusted by adjusting the size of the wire passage groove 13231, making the arrangement of the wire passage 133 more flexible and diverse, which helps to meet different design requirements.

[0073] In some embodiments of this utility model, such as Figure 5 and Figure 7 As shown, the annular ring 131 includes an arc segment 1311 and a clearance segment 1312, which are continuously arranged along the circumference of the motor body 10. In the axial projection of the external rotor motor 1, the outer contour of the arc segment 1311 is a superior arc, and the outer contour of the clearance segment 1312 is located within the range enclosed by the base circle line C1 where the outer contour of the arc segment 1311 is located. Furthermore, a clearance area C2 is left between the outer contour of the clearance segment 1312 and the base circle line C1, and the wire passage 133 protrudes outside the arc segment 1311.

[0074] It should be noted that the arc segment 1311 is the arc-shaped part continuously arranged along the circumference of the annular ring 131, forming the basic outline of the annular ring 131; the outer outline of the clearance segment 1312 is located inside the base circle line C1 where the arc segment 1311 is located, which means that relative to the entire base circle line C1, the clearance segment 1312 is recessed inward towards the center of the base circle line C1 to form the clearance area C2. The clearance area C2 can be used to accommodate other components or structures to avoid interference between the motor cover 13 and other components or structures, and can make full use of space to make the structure of the external rotor motor 1 more compact.

[0075] Understandably, by setting the wire passage 133 to protrude outside the arc segment 1311, the size of the return water segment 181 of the connecting wire 18 can be increased, which is beneficial to improving the waterproof performance of the return water segment 181 and improving the reliability of the external rotor motor 1. In addition, the setting of the avoidance segment 1312 makes it easier to position the annular ring 131 and the cover end cap 132 during assembly, which is beneficial to improving assembly efficiency.

[0076] The outer contour shape of the avoidance section 1312 is not limited to the chord shape shown in the figure. For example, the shape of the avoidance section 1312 can be a curve. The size and position of the avoidance section 1312 are also not limited to the situation shown in the figure. They should be designed according to the size of the avoidance space and the stress situation of the annular ring 131.

[0077] In some embodiments of this utility model, such as Figure 4 As shown, the axis of the motor body 10 can be set to be perpendicular to the direction of gravity. The cable pass 133 can be set to be located at the lower part of the motor cover 13 in the direction of gravity. In the axial projection of the outer rotor motor 1, the axis of the motor cover 13 is drawn as a horizontal baseline L perpendicular to the direction of gravity. The cable bundle structure 1324 is lower than the horizontal baseline L and higher than the cable pass 133.

[0078] With the above settings, a suitable distance can be maintained between the wire harness structure 1324 and the wire passage 133. This can prevent the bending angle of the connecting wire 18 from being too large due to the small distance between the wire harness structure 1324 and the wire passage 133. It can also ensure the limiting effect of the wire harness structure 1324 on the connecting wire 18, improve the installation stability of the connecting wire 18 in the wire passage 133, reduce the friction between the connecting wire 18 and the wire passage 133, and extend the service life of the connecting wire 18.

[0079] In some embodiments of this utility model, such as Figure 4As shown, in the axial projection of the external rotor motor 1, a vertical baseline H extending along the direction of gravity is drawn through the axis of the motor cover 13. The wire harness structure 1324 and the wire passage 133 can be located on the same side of the vertical baseline H. This shortens the length of the connecting wire 18, reducing costs, and also reduces the probability of interference between the connecting wire 18 and other components or structures, thus improving the connection stability between the connecting wire 18 and the stator 12.

[0080] In some embodiments of this utility model, such as Figure 4 As shown, the wire harness structure 1324 can be configured as a wire clip 1325. The wire clip 1325 extends axially outward from the motor cover 13 and then upward, so that the wire clip 1325 and the motor cover 13 can define an upwardly open wire-holding groove. During installation, the connecting wire 18 can be aligned vertically with the wire-holding groove, and then driven downward into the groove to engage with the wire clip 1325. This reduces the difficulty of installing the connecting wire 18.

[0081] In some embodiments of this utility model, the stator 12 includes a stator body 121 and a limiting protrusion 122. The limiting protrusion 122 is located at one end of the stator body 121 near the end cap 132 and protrudes from the outer circumferential surface of the stator body 121. A limiting groove 1315 is formed inside the annular ring 131. The limiting groove 1315 is open on the side of the motor body 10 facing the end cap 132 in the axial direction F, forming a groove opening. The side away from the end cap 132 forms a groove bottom wall. A damping sleeve 15 is provided outside the limiting protrusion 122. The damping sleeve 15 at least covers the two axial end faces of the limiting protrusion 122. The limiting protrusion 122 and the damping sleeve 15 extend together from the groove opening into the limiting groove 1315 along the axial direction of the stator 12 and are clamped between the end cap 132 and the groove bottom wall along the axial direction F of the motor body 10. The wire passage 133 and the limiting protrusion 122 are spaced apart along the circumferential direction of the motor body 10.

[0082] For example, refer to Figures 1-6 As shown, the stator 12 includes a stator body 121 and a limiting protrusion 122. The limiting protrusion 122 is located at one end of the stator body 121 near the end cap 132, and protrudes from the outer circumferential surface of the stator body 121. A limiting groove 1315 is formed inside the annular ring 131. On the axial direction F of the motor body 10, the side of the limiting groove 1315 facing the end cap 132 is open to form a groove opening, and the side of the limiting groove 1315 away from the end cap 132 forms a groove bottom wall.

[0083] A damping sleeve 15 is provided outside the limiting protrusion 122. The damping sleeve 15 can be made of elastic materials such as silicone rubber. The damping sleeve 15 at least covers the two end faces of the limiting protrusion 122 on the axial direction F of the motor body 10. The limiting groove 1315 is matched with the damping sleeve 15. The limiting protrusion 122, together with the damping sleeve 15, can extend from the groove opening into the limiting groove 1315 along the axial direction of the stator 12. The limiting protrusion 122 can be limited and engaged with the bottom wall of the groove along the axial direction F of the motor body 10. The end cap 132 can be connected to the annular ring 131 and limited and engaged with the limiting protrusion 122 along the axial direction F of the motor body 10, so as to clamp the limiting protrusion 122 between the end cap 132 and the bottom wall of the groove, and the damping sleeve 15 is used to separate the limiting protrusion 122 from the end cap 132 and the bottom wall of the groove.

[0084] Understandably, by clamping the limiting protrusion 122 of the stator 12 between the end cover 132 and the bottom wall of the slot, the stator 12 can be restricted from moving relative to the motor cover 13, which helps to ensure the installation stability of the stator 12 and the motor cover 13, thereby improving the operating stability of the external rotor motor 1. In addition, by wrapping the damping sleeve 15 around the axial end faces of the limiting protrusion 122, the damping sleeve 15 can separate the limiting protrusion 122 from the end cover 132 and the bottom wall of the slot, which can prevent the limiting protrusion 122 from directly colliding with the end cover 132 and the bottom wall of the slot. The damping sleeve 15 can also be used to eliminate the mating clearance, thereby improving the installation stability of the stator 12.

[0085] In some embodiments of this utility model, such as Figure 3 As shown, multiple limiting protrusions 122 can be provided, and these multiple limiting protrusions 122 are spaced apart along the circumference of the stator 12. Multiple limiting grooves 1315 can also be provided, with each limiting groove 1315 corresponding to one of the multiple limiting protrusions 122. The multiple limiting protrusions 122 are used to extend into their respective limiting grooves 1315 to engage with the annular ring 131. The damping sleeve 15 also covers the radial outer surface and circumferential sides of the limiting protrusions 122. The damping sleeve 15 can be used to separate the limiting protrusions 122 from the circumferential and radial sidewalls of the limiting grooves 1315.

[0086] With the above configuration, multiple limiting protrusions 122 can limit the stator 12 from different circumferential positions to restrict the stator 12 from moving relative to the motor cover 13 in the axial, radial or circumferential direction, thereby improving the installation stability of the stator 12 and dispersing the force between the stator 12 and the motor cover 13, avoiding structural damage caused by excessive local force, thus enhancing structural stability and improving the reliability of the external rotor motor 1.

[0087] In addition, by setting the vibration damping sleeve 15 as a buffer, the vibration energy between the limiting protrusion 122 and the motor cover 13 can be effectively absorbed, thereby reducing the noise and vibration during mechanical operation. On the other hand, the vibration damping sleeve 15 can reduce the direct friction and collision between the limiting protrusion 122 and the motor cover 13, extending the service life of both and avoiding structural damage or wear caused by long-term vibration. Furthermore, by selecting vibration damping sleeves 15 of different materials or thicknesses, the vibration damping effect can be adjusted to meet the vibration and noise control requirements under different working conditions. Moreover, the vibration damping sleeve 15 can produce elastic deformation, and the stator 12 can generate a small displacement by squeezing the vibration damping sleeve 15. The stator 12 can adaptively adjust its position relative to the motor cover 13 to improve the coaxiality of the rotor 11 and the stator 12. Of course, this utility model is not limited to this. For example, in other embodiments of this utility model, the vibration damping sleeve 15 can be omitted, and the limiting protrusion 122 and the motor cover 13 can directly abut against each other.

[0088] In some embodiments of this utility model, the end cap 132 and the annular ring 131 are engaged by a snap-fit ​​structure 16 and fixedly connected by a fastener 17.

[0089] For example, in the specific installation process, the annular ring 131 can be first fitted onto the outside of the motor body 10, and then the end cover 132 can be installed on the axial F side of the motor body 10. The end cover 132 can be engaged with the annular ring 131 through the snap-fit ​​structure 16 to achieve the positioning of the end cover 132 and the annular ring 131. At this time, the end cover 132 and the annular ring 131 can be fixedly connected together by the fastener 17. The limiting protrusion 122 can be clamped between the annular ring 131 and the end cover 132 to achieve the fixed installation of the stator 12 and the motor cover 13. Finally, the stator 12 can be engaged with the rotor 11 to complete the assembly of the external rotor motor 1.

[0090] It is understandable that, since the motor cover 13 includes an annular ring 131 and a cover end cap 132, the structure of the motor cover 13 is simple and easy to process. By setting the cover end cap 132 and the annular ring 131 to be engaged by the snap-fit ​​structure 16 and fixedly connected by the fastener 17, the assembly efficiency and reliability of the motor cover 13 can be taken into account. This allows the stator 12 to be stably fixed inside the motor cover 13, so as to avoid the stator 12 from shifting. This helps to ensure that the stator 12 and the rotor 11 have good concentricity and improves the overall performance of the external rotor motor 1.

[0091] In some embodiments of this utility model, the snap-fit ​​structure 16 includes a first snap-fit ​​portion disposed on the annular ring 131 and a second snap-fit ​​portion disposed on the end cap 132. One of the first snap-fit ​​portion and the second snap-fit ​​portion is a snap-fit ​​protrusion 1321 and the other is a snap-fit ​​groove 1313. The snap-fit ​​protrusion 1321 and the snap-fit ​​groove 1313 engage in snap-fit ​​cooperation.

[0092] For example, refer to Figure 3 , Figure 5 and Figure 6 As shown, the snap-fit ​​structure 16 includes a first snap-fit ​​part and a second snap-fit ​​part. The first snap-fit ​​part is disposed on the annular ring 131, and the second snap-fit ​​part is disposed on the end cap 132. The end cap 132 can be snapped and connected to the first snap-fit ​​part of the annular ring 131 through the second snap-fit ​​part, so as to snap and fix the end cap 132 on the annular ring 131.

[0093] In this configuration, one of the first and second snap-fit ​​portions can be configured as a snap-fit ​​protrusion 1321 and the other as a snap-fit ​​groove 1313. The snap-fit ​​protrusion 1321 and the snap-fit ​​groove 1313 engage to connect the end cap 132 to the annular ring 131. For example, the first snap-fit ​​portion can be configured as a snap-fit ​​protrusion 1321 and the second snap-fit ​​portion as a snap-fit ​​groove 1313; or, the second snap-fit ​​portion can be configured as a snap-fit ​​protrusion 1321 and the first snap-fit ​​portion as a snap-fit ​​groove 1313.

[0094] The above-described design reduces the installation difficulty between the annular ring 131 and the end cap 132, simplifies the structure of the motor cover 13, and reduces its processing cost. Of course, this application is not limited to this. For example, both can be machined as snap-fit ​​protrusions 1321, with transition pieces having snap-fit ​​grooves 1313 that snap-fit ​​with both respectively; or both can be machined as snap-fit ​​grooves 1313, with transition pieces having snap-fit ​​protrusions 1321 that snap-fit ​​with both respectively, etc., which will not be elaborated upon here.

[0095] In some embodiments of this utility model, such as Figures 5-6 As shown, the annular ring 131 has a first connecting portion 1314, and the end cover 132 has a second connecting portion 1322. The second connecting portion 1322 overlaps the first side of the first connecting portion 1314 along the axial direction F of the motor body 10. The fastener 17 is a threaded fastener 14. The threaded fastener 14 passes through the second connecting portion 1322 and is threadedly connected to the first connecting portion 1314 to fix the end cover 132 on the annular ring 131.

[0096] The above-described configuration improves the connection stability between the annular ring 131 and the end cover 132, enhances the reliability of the motor cover 13, and facilitates easy disassembly and assembly of the annular ring 131 and the end cover 132 for subsequent maintenance. Of course, this application is not limited to this; for example, bolts and nuts, rivets, etc., can also be used as fasteners 17.

[0097] This utility model also proposes a cross-flow fan 100.

[0098] like Figure 1As shown, the cross-flow fan 100 according to an embodiment of the present utility model includes a cross-flow impeller 2 and an external rotor motor 1 according to any of the above embodiments. The external rotor motor 1 is located at one axial end of the cross-flow impeller 2. The rotor ring 111 is coaxially arranged and fixedly connected to the cross-flow impeller 2. The stator 12 can drive the cross-flow impeller 2 to rotate by driving the rotor 11 to rotate.

[0099] According to the embodiment of the present utility model, the cross-flow fan 100 has high connection stability between the motor body 10 and the connecting wire 18, and the external rotor motor 1 has good reliability, which is conducive to improving the overall performance of the cross-flow fan 100.

[0100] This utility model also proposes an air conditioner 1000.

[0101] like Figure 8 As shown, the air conditioner 1000 according to an embodiment of the present utility model includes: an air conditioner body 200 and a cross-flow fan 100 according to any of the above embodiments, wherein an external rotor motor 1 is fixedly installed on the air conditioner body 200 through a motor cover 13.

[0102] According to the embodiment of the present utility model, the air conditioner 1000 has high connection stability between the motor body 10 and the connecting wire 18, and good reliability of the external rotor motor 1, which is conducive to improving the overall performance of the cross-flow fan 100 and enhancing the product competitiveness of the air conditioner 1000.

[0103] In some embodiments of this utility model, the annular ring 131 includes an arc segment 1311 and a clearance segment 1312 continuously arranged along the circumference of the motor body 10. In the axial projection of the external rotor motor 1, the outer contour of the arc segment 1311 is a superior arc, and the outer contour of the clearance segment 1312 is located within the range enclosed by the base circle line C1 where the outer contour of the arc segment 1311 is located, and a clearance area C2 is left between the clearance segment 1312 and the base circle line C1; the air conditioner 1000 is a wall-mounted air conditioner, and the air conditioner body 200 The system includes a chassis 201, a cross-flow fan 2 with its axis pointing left and right, a motor cover 13 mounted on the chassis 201, and a clearance section 1312 located on the rear side of the motor cover 13. The chassis 201 includes a chassis back plate 2011 located on the rear side of the cross-flow fan 100. The chassis back plate 2011 is recessed into the clearance area C2 at the corresponding clearance section 1312 to define a clearance space 2012 that intrudes forward into the front side of the rear surface of the chassis back plate 2011. A refrigerant pipe passes through the clearance space 2012.

[0104] For example, refer to Figures 8-10As shown, the annular ring 131 includes an arc segment 1311 and a clearance segment 1312 continuously arranged along the circumference of the stator 12. In the axial projection of the external rotor motor 1, the outer contour of the arc segment 1311 is a superior arc, and the outer contour of the clearance segment 1312 is located within the range enclosed by the base circle line C1 where the outer contour of the arc segment 1311 is located. Furthermore, a clearance area C2 is left between the outer contour of the clearance segment 1312 and the base circle line C1.

[0105] It should be noted that the arc segment 1311 is the arc-shaped part continuously arranged along the circumference of the ring 131, forming the basic outline of the ring 131; the outer outline of the avoidance segment 1312 is located inside the base circle line C1 where the arc segment 1311 is located, which means that relative to the entire base circle line C1, the avoidance segment 1312 is recessed inward towards the center of the base circle line C1 to form the clearance area C2.

[0106] The air conditioner 1000 is a wall-mounted air conditioner. The air conditioner body 200 includes a chassis 201. The axis of the cross-flow fan 2 and the axis of the external rotor motor 1 are both in the left-right direction. The motor cover 13 is installed on the chassis 201. The clearance section 1312 is located on the rear side of the motor cover 13. The chassis 201 includes a chassis back plate 2011. The chassis back plate 2011 is located on the rear side of the cross-flow fan 100. The chassis back plate 2011 is recessed into the clearance area C2 at the corresponding clearance section 1312 to define a clearance space 2012 on the rear side of the chassis back plate 2011. The clearance space 2012 intrudes forward into the front side of the rear surface of the chassis back plate 2011. The clearance space 2012 is used for the passage of refrigerant pipes.

[0107] With the above configuration, the chassis back plate 2011 can provide clearance 2012 for the refrigerant pipe to pass through, which can prevent the refrigerant pipe from protruding from the rear surface of the chassis back plate 2011. This allows the chassis back plate 2011 of the chassis 201 to be installed close to the wall, reducing the size of the air conditioner 1000 in the front-rear direction. Furthermore, the refrigerant pipe does not occupy the outer space of the cross-flow fan 100 in the axial direction, thereby reducing the size of the air conditioner 1000 in the axial direction (i.e., the left-right direction), which is conducive to the miniaturization design of the air conditioner 1000.

[0108] In some embodiments of this utility model, such as Figure 5 as well as Figures 8-9 As shown, the air conditioner 1000 also includes a pressure cap 300. A mounting ear 1316 protrudes from the outer wall of the annular ring 131. The chassis 201 has mounting holes. The pressure cap 300 is used to press onto the side of the motor cover 13 facing away from the chassis 201. Fasteners 17 can penetrate the pressure cap 300 and the mounting ear 1316 to extend into the mounting holes, thereby fixing the pressure cap 300 and the motor cover 13 to the chassis 201. This improves the installation stability of the external rotor motor 1.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0110] 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 electric machine characterized by, include: An electric motor body, the electric motor body including a rotor and a stator, the rotor including a rotor ring, and at least a portion of the stator extending into the rotor ring; The motor cover includes an annular ring and a cover end cap. The annular ring surrounds the motor body circumferentially. The cover end cap is located on one axial side of the motor body and covers the open opening on the axial side of the annular ring. The cover end cap and the annular ring together define a wire passage. A wire harness structure is provided on the side of the cover end cap opposite to the motor body.

2. An external rotor electric machine according to claim 1, characterized in that The cable pass-through port is located on the outer peripheral edge of the motor cover.

3. An external rotor electric machine according to claim 2, characterized in that, The axis of the motor body is perpendicular to the direction of gravity, and the cable passage is located at the lower part of the motor cover in the direction of gravity.

4. An external rotor electric machine according to claim 3, characterized in that, In the axial projection of the external rotor motor, the line connecting the axis of the wire passage and the axis of the motor cover is the first line, and the angle α between the first line and the direction of gravity is less than or equal to 30°.

5. An external rotor electric motor as claimed in claim 3, characterised in that, In the axial projection of the external rotor motor, a vertical baseline extending along the direction of gravity is drawn through the axis of the motor cover. The lowest point of the line opening is lower than or level with the lowest point where the vertical baseline intersects the motor cover.

6. The external rotor motor according to claim 2, characterized in that, The annular ring has a first mating portion on its edge, and the end cap has a second mating portion on its edge. The first mating portion protrudes from the outer circumferential surface of the annular ring, and the second mating portion protrudes from the outer circumferential surface of the end cap. The wire passage is defined by the first mating portion and the second mating portion, and is located at the end of the first mating portion and the second mating portion away from the axis of the motor cover.

7. An external rotor electric motor as claimed in claim 6, characterised in that, The end cap extends into the annular ring, the peripheral wall of the annular ring surrounds the peripheral wall of the end cap, the first mating part defines a mating groove, the mating groove is open on the side of the motor body facing the end cap in the axial direction, and the second mating part is embedded in the mating groove from the open side of the mating groove.

8. An external rotor electric motor as claimed in claim 7, characterised in that, The second mating part defines a wire passage groove, which is open on the side of the motor body facing the first mating part in the axial direction. A wire passage channel is formed between the wire passage groove and the mating groove, and the wire passage channel connects the interior of the motor cover with the wire passage opening.

9. An external rotor electric motor as claimed in claim 2, characterised in that, The annular ring includes an arc segment and a clearance segment continuously arranged along the circumference of the motor body. In the axial projection of the external rotor motor, the outer contour of the arc segment is a superior arc. The outer contour of the clearance segment is located within the range enclosed by the base circle line where the outer contour of the arc segment is located, and a clearance area is left between the clearance segment and the base circle line. The wire passage protrudes outside the arc segment.

10. The external rotor electric machine of claim 1, wherein, The axis of the motor body is perpendicular to the direction of gravity. The wire passage is located at the lower part of the motor cover in the direction of gravity. In the axial projection of the outer rotor motor, a horizontal baseline perpendicular to the direction of gravity is drawn through the axis of the motor cover. The wire harness structure is lower than the horizontal baseline and higher than the wire passage.

11. An external rotor electric motor as claimed in claim 10, characterised in that, In the axial projection of the external rotor motor, a vertical baseline extending along the direction of gravity is drawn through the axis of the motor cover, and the wire harness structure and the wire passage are located on the same side of the vertical baseline.

12. The external rotor electric machine of claim 10, wherein, The wire harness structure is formed as a wire buckle, which first extends axially outward from the motor cover and then extends upward.

13. The external rotor electric machine of claim 1, wherein, The stator includes a stator body and a limiting protrusion. The limiting protrusion is located at one end of the stator body near the end cap and protrudes from the outer circumferential surface of the stator body. A limiting groove is formed inside the annular ring. The limiting groove is open on the side of the motor body facing the end cap in the axial direction to form a slot, and a bottom wall is formed on the side away from the end cap. A vibration damping sleeve is provided outside the limiting protrusion. The vibration damping sleeve at least covers the two axial end faces of the limiting protrusion. The limiting protrusion and the vibration damping sleeve extend from the slot into the limiting groove along the axial direction of the stator and are clamped between the end cap and the bottom wall of the groove along the axial direction of the motor body. The wire passage and the limiting protrusion are spaced apart along the circumference of the motor body.

14. An external rotor electric machine according to claim 13, characterized in that, The limiting protrusions are multiple and spaced apart along the circumference of the motor body; the limiting grooves are multiple and correspond one-to-one with the multiple limiting protrusions; the damping sleeve also covers the radial outer surface and the two circumferential sides of the limiting protrusions; and / or, the end cap and the annular ring are engaged by a snap-fit ​​structure and fixedly connected by fasteners.

15. A cross-flow fan characterized by It includes a cross-flow impeller and an external rotor motor according to any one of claims 1-14, wherein the external rotor motor is disposed at one axial end of the cross-flow impeller, and the rotor ring is coaxially arranged and fixedly connected to the cross-flow impeller.

16. An air conditioner characterized by comprising: include: The air conditioner body and the cross-flow fan according to claim 15, wherein the external rotor motor is fixedly installed on the air conditioner body through the motor cover.

17. The air conditioner of claim 16, wherein The annular ring includes an arc segment and a clearance segment continuously arranged along the circumference of the motor body. In the axial projection of the external rotor motor, the outer contour of the arc segment is a superior arc, and the outer contour of the clearance segment is located within the range enclosed by the base circle line where the outer contour of the arc segment is located, and a clearance area is left between the clearance segment and the base circle line. The air conditioner is a wall-mounted air conditioner. The air conditioner body includes a chassis, a cross-flow fan with its axis pointing left and right, a motor cover mounted on the chassis, a clearance section located behind the motor cover, and a chassis back plate located behind the cross-flow fan. The chassis back plate is recessed into the clearance area at the location corresponding to the clearance section to define a clearance space that intrudes forward into the front side of the rear surface of the chassis back plate. A refrigerant pipe passes through the clearance space.

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