Outer rotor motor, cross-flow fan and air conditioner

Abstract

The utility model discloses an external rotor motor, cross-flow fan and air conditioner, the external rotor motor includes: rotor, stator, stator mounting piece and vibration damping structural member, rotor includes rotor ring, stator includes stator body and mounting portion, stator body extends into the ring hole of rotor, mounting portion is located the rotor axial outer side, and the mounting portion is located in the ring hole of rotor ring. And the mounting part is connected with the shaft end of the stator body, and at least part of the mounting part protrudes out of the peripheral surface of the stator body. The stator mounting piece is used for fixing the mounting part, and the damping structural piece is spaced between the mounting part and the stator mounting piece. According to the external rotor motor provided by the utility model, the vibration damping structural member which plays a role in vibration damping is arranged, so that the vibration noise which is transmitted outwards by the external rotor motor can be reduced, and the installation stability of the external rotor motor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning equipment field especially a kind of outer rotor motor, cross-flow fan and air conditioner. BACKGROUND

[0002] Outer rotor motor is widely used in air conditioning field in recent years due to its small axial dimension and other characteristics.The stator of outer rotor motor is located in the inside of rotor, and rotor and stator can rotate together.However, there are problems such as vibration noise and unstable installation when outer rotor motor operates, and there is room for improvement. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides an outer rotor motor, which can improve the vibration noise transmitted outward during operation.

[0004] The utility model further provides a cross-flow fan with the above-mentioned outer rotor motor.

[0005] The utility model further provides an air conditioner with the above-mentioned cross-flow fan.

[0006] According to the outer rotor motor of the utility model, the vibration structure member is arranged to reduce vibration, which can reduce the vibration of the stator relative to the stator mounting member, thereby reducing the vibration noise transmitted outward by the outer rotor motor.

[0007] According to the outer rotor motor of the utility model, the vibration structure member is arranged to reduce vibration, which can reduce the vibration of the stator relative to the stator mounting member, thereby reducing the vibration noise transmitted outward by the outer rotor motor.

[0008] In some embodiments, the stator mounting member includes an annular ring that surrounds the mounting portion in the circumferential direction of the stator, and the vibration structure member includes a first vibration reduction portion that is spaced between the outer peripheral surface of the mounting portion and the inner peripheral surface of the annular ring.

[0009] In some embodiments, the stator mounting member further comprises two end limiters arranged at the axial ends of the annular ring, the mounting portion is clamped between the two end limiters, and the damping structure further comprises a second damping portion, and the axial ends of the mounting portion are respectively spaced from the end limiters by the second damping portion.

[0010] In some embodiments, the first damping portion is integrally connected with the second damping portion, the axial ends of the first damping portion respectively extend towards the radially inner side by the second damping portion, the second damping portions at the axial ends and the first damping portion form a slot, and the mounting portion is inserted into the slot so that the damping structure is sleeved outside the mounting portion.

[0011] In some embodiments, the first damping portion has a first protrusion protruding towards the direction of the annular ring, and / or the second damping portion has a second protrusion protruding towards the direction of the end limiter, and / or at least one of the first damping portion and the second damping portion is provided with a through hole.

[0012] In some embodiments, the mounting portion comprises a protrusion protruding from the outer circumferential surface of the stator body, the protrusion is a plurality of and is arranged at intervals along the circumference of the stator, and the damping structure is a plurality of and is arranged one-to-one corresponding to the plurality of protrusions, so that the damping structure is sleeved on each of the protrusions.

[0013] In some embodiments, the inner wall of the annular ring has a plurality of limit grooves, and the plurality of limit grooves correspond one-to-one to the plurality of protrusions.

[0014] In some embodiments, the two end limiters at the axial ends of the annular ring are a flange and an end cover respectively, the flange is arranged integrally with the annular ring and protrudes towards the inner ring area of the annular ring, and the end cover is assembled with the annular ring.

[0015] In some embodiments, the flange is arranged close to the rotor relative to the end cover, the flange is annular and has an inner diameter greater than the outer diameter of the rotor ring, and part of the second damping portion protrudes opposite the inner ring area of the flange and is spaced between the mounting portion and the rotor ring.

[0016] In some embodiments, the end of the rotor away from the stator is provided with a rotor end plate, the axial spacing between the rotor end plate and the stator body is d1, the axial spacing between the part of the second damping portion spaced between the mounting portion and the rotor ring and the rotor ring is d2, and the limit compression distance of the second damping portion is d0, d1>d0+d2.

[0017] In some embodiments, the annular ring comprises a circular arc segment arranged continuously along the circumference and the avoiding part, the circular arc segment is a major arc, the avoiding part is located inside a base circle formed by the circular arc segment, the mounting part comprises a cut edge part which is in shape matching with the avoiding part and opposite to the avoiding part in the circumference, the damping structure is opposite to the circular arc segment in the circumference to be spaced between the mounting part and the circular arc segment.

[0018] In some embodiments, the stator mounting part further comprises a protection ring, an outer diameter of the protection ring is smaller than an outer diameter of the circular arc segment, the protection ring is connected with the annular ring and surrounds the rotor ring outside, and is in gap matching with the rotor ring.

[0019] In some embodiments, an outer wall of the circular arc segment protrudes a first mounting ear, a second mounting ear and a positioning plug, the avoiding part is located at one side of a central vertical plane of the stator, the first mounting ear and the positioning plug are respectively arranged at two ends of the avoiding part in the circumference, and are located at the same side of the central vertical plane as the avoiding part, the positioning plug is lower than the first mounting ear, the second mounting ear is located at two sides of the central vertical plane as the avoiding part, and is lower than a central horizontal plane of the stator.

[0020] In some embodiments, the positioning plug is externally provided with a first damping sleeve; and / or, at least one of the first mounting ear and the second mounting ear is provided with a second damping sleeve.

[0021] In some embodiments, the avoiding part comprises a straight cut edge segment extending along a chord line of a base circle where the circular arc segment is located, the avoiding part comprises a plurality of the straight cut edge segments, and the plurality of the straight cut edge segments are arranged in sequence and abut along the circumference.

[0022] According to the cross-flow fan of the second aspect of the utility model, the cross-flow fan comprises: a fan wheel and a motor, the fan wheel is a cross-flow fan wheel, and the motor is an outer rotor motor according to the first aspect of the utility model, the outer rotor motor is arranged at one end of the fan wheel in the axial direction, and the rotor is coaxially arranged with and fixedly connected to the fan wheel.

[0023] According to the cross-flow fan of the utility model, by arranging the outer rotor motor of the first aspect, vibration noise of the cross-flow fan wheel can be reduced, and working reliability of the cross-flow fan wheel is improved.

[0024] According to the air conditioner of the third aspect of the utility model, the air conditioner comprises: a fan and a bottom plate, the fan is a cross-flow fan according to the second aspect, and the outer rotor motor is fixedly arranged on the bottom plate through the stator mounting part.

[0025] According to the air conditioner of the utility model, by arranging the cross-flow fan of the second aspect of the utility model, working reliability of the air conditioner can be improved.

[0026] In some embodiments, the air conditioner is an air conditioner hanging machine, the axial direction of the cross-flow fan wheel is left-right direction, the axis of the stator is horizontally arranged, the rear plate of the bottom plate is formed with a giving space intruding towards the direction of the outer rotor motor at the position corresponding to the outer rotor motor, the outer rotor motor is the outer rotor motor described above, the avoiding part is located at the rear side of the circular arc segment and is arranged corresponding to the giving space, and the refrigerant pipe of the heat exchanger of the air conditioner is arranged in the giving space.

[0027] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is an exploded view of the structure of the outer rotor motor according to an embodiment of the present application;

[0029] Figure 2 is a sectional view of the outer rotor motor according to an embodiment of the present application;

[0030] Figure 3 is a partial structure exploded view of the outer rotor motor according to an embodiment of the present application;

[0031] Figure 4 is a structure schematic view of the damping structure according to an embodiment of the present application;

[0032] Figure 5 is a structure schematic view of the stator and the damping structure according to an embodiment of the present application;

[0033] Figure 6 is an exploded view of the structure of the stator and the damping structure according to an embodiment of the present application;

[0034] Figure 7 is a front view of the damping structure according to an embodiment of the present application;

[0035] Figure 8 is a sectional view of the damping structure according to an embodiment of the present application;

[0036] Figure 9 is an exploded view of the structure of the stator, the damping structure and the stator mounting according to an embodiment of the present application;

[0037] Figure 10 is an assembly schematic view of the stator, the damping structure and the stator mounting according to an embodiment of the present application;

[0038] Figure 11 is a local enlarged view of the A area according to the example shown in Fig. Figure 2 ;

[0039] Figure 12 is a structural schematic view of a stator mounting member according to one embodiment of the present application;

[0040] Figure 13 is a structural schematic view of a stator mounting member according to another embodiment of the present application;

[0041] Figure 14 is a structural exploded view of a cross-flow fan according to one embodiment of the present application;

[0042] Figure 15 is a partial structural schematic view of an air conditioner according to one embodiment of the present application;

[0043] Figure 16 is a partial structural side view of an air conditioner according to one embodiment of the present application.

[0044] Reference signs:

[0045] Air conditioner 1000;

[0046] Fan 100; cross-flow fan 100a;

[0047] Outer rotor motor 10;

[0048] Rotor 1; rotor ring 11; rotor end plate 12; rotating shaft 13;

[0049] Stator 2; stator body 21; mounting portion 22; protrusion 221; cut edge portion 22b; central vertical plane S1 of stator; central horizontal plane S2 of stator;

[0050] Stator mounting member 3; annular ring 31; limiting groove 311; positioning rib 312; circular arc segment 31a; avoiding portion 31b; straight cut edge segment 31b1; end limiting member 32; flange 321; end cover 322; protection ring 33; first mounting lug 34; second mounting lug 35; positioning bolt 36; fixing screw 37;

[0051] Damping structure member 4; first damping portion 41; first protrusion 411; through hole 412; second damping portion 42; second protrusion 421; embedding groove 43;

[0052] First damping sleeve 5;

[0053] Second damping sleeve 6;

[0054] Impeller 70; cross-flow impeller 70a;

[0055] Chassis 800; back plate 81; accommodation space 8a;

[0056] Refrigerant pipe 900. DETAILED DESCRIPTION

[0057] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0058] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of the specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0059] The outer rotor motor 10 of the first aspect of the present application will be described below with reference to the drawings.

[0060] According to the outer rotor motor 10 of the embodiment of the present application, as shown in Figure 1 and Figure 2 The outer rotor motor 10 includes a rotor 1, a stator 2, a stator mounting member 3, and a damping structure member 4, the rotor 1 includes a rotor ring 11, the stator 2 includes a stator body 21 and a mounting portion 22, the stator body 21 extends into the ring hole of the rotor ring 11, the mounting portion 22 is located on the axial outer side of the rotor ring 11 and is connected to the shaft end of the stator body 21, and at least part of the mounting portion 22 protrudes from the outer peripheral surface of the stator body 21. The stator mounting member 3 is used to fix the mounting portion 22, and the damping structure member 4 is spaced between the mounting portion 22 and the stator mounting member 3.

[0061] When the outer rotor motor 10 is powered on, the magnetic field generated by the stator 2 and the magnetic field generated by the rotor 1 interact to allow the rotor 1 to rotate relative to the stator 2. The stator body 21 of the outer rotor motor 10 is located on the inner side of the rotor ring 11, and the rotor ring 11 surrounds the stator body 21. Compared with the transmission inner rotor motor, the axial size of the outer rotor motor 10 is shorter, which is conducive to the arrangement and assembly of the outer rotor motor 10.

[0062] The stator 2 further comprises a mounting portion 22, and the stator 2 is fixedly connected with the stator mounting member 3 through the mounting portion 22. The mounting portion 22 is connected with an axial end portion of the stator body 21 and protrudes radially from an outer peripheral surface of the stator body 21, the stator body 21 is located in the annular hole of the rotor ring 11, the mounting portion 22 on the outer peripheral surface of the stator body 21 is located at an axial outer side of the rotor ring 11, the mounting portion 22 does not interfere with the movement of the rotor ring 11, and the working reliability of the outer rotor motor 10 is improved.

[0063] In the prior art, the stator is not stably mounted with the stator mounting member, vibration noise is generated when the outer rotor motor operates, and there is room for improvement.

[0064] The mounting portion 22 of the stator 2 is fixedly connected with the stator mounting member 3 through the damping structure member 4, the damping structure member 4 is spaced between the mounting portion 22 and the stator mounting member 3, the damping structure member 4 can play a damping role, the vibration of the stator 2 relative to the stator mounting member 3 can be reduced, and the damping structure member 4 has a higher friction coefficient, so that the connection stability of the stator 2 and the stator mounting member 3 is improved.

[0065] According to the outer rotor motor 10 provided in the embodiment of the utility model, the damping structure member 4 that plays a damping role is arranged, the vibration of the stator 2 relative to the stator mounting member 3 can be reduced, so that the vibration noise transmitted outward by the outer rotor motor 10 can be reduced, the vibration of the stator 2 relative to the stator mounting member 3 is reduced, the external mounting of the stator mounting member 3 is more reliable, and the mounting stability of the outer rotor motor 10 can be improved.

[0066] In some embodiments of the utility model, the damping structure member 4 is a damping material member, the damping structure member 4 can be elastically deformed, the stator 2 can produce a smaller displacement by extruding the damping structure member 4, the stator 2 can be adaptively adjusted in position relative to the stator mounting member 3, the coaxiality of the rotor ring 11 and the stator 2 is met, and the stability of the rotation of the rotor 1 relative to the stator 2 is improved.

[0067] In some embodiments of the utility model, as shown in Figures 1-3 The stator mounting member 3 comprises an annular ring 31, the annular ring 31 surrounds the mounting portion 22 in the circumferential direction of the stator 2, and the damping structure member 4 comprises a first damping portion 41, and the first damping portion 41 is spaced between the outer peripheral surface of the mounting portion 22 and the inner peripheral surface of the annular ring 31.

[0068] The annular ring 31 surrounds at least the mounting portion 22 of the stator 2, the annular ring 31 is connected with the mounting portion 22 of the stator 2 in the circumferential direction, and the connection stability of the stator 2 and the stator mounting member 3 is improved. The first damping portion 41 is spaced between the outer peripheral surface of the mounting portion 22 and the inner peripheral surface of the annular ring 31, the stator 2 is damped in the radial direction, the vibration of the stator 2 in the radial direction is reduced, and the mounting stability of the stator 2 and the stator mounting member 3 is improved.

[0069] In some embodiments of the utility model, as shown in Figure 2 The stator mounting piece 3 further comprises two end limiters 32 arranged at the axial two ends of the annular ring 31, and the mounting portion 22 is clamped between the two end limiters 32, as shown in Figure 4 The damping structure piece 4 further comprises a second damping portion 42, and the axial two side end faces of the mounting portion 22 are respectively spaced from the two end limiters 32 by the second damping portion 42.

[0070] In the axial direction of the stator 2, the two ends of the annular ring 31 are provided with the end limiters 32, and after the stator 2 is mounted on the annular ring 31, the mounting portion 22 of the stator 2 is located between the two end limiters 32 in the axial direction. By arranging the end limiters 32, the stator 2 can be limited, and the stator 2 is prevented from moving in the axial direction relative to the stator mounting piece 3.

[0071] The second damping portion 42 is spaced between the mounting portion 22 and the end limiter 32 in the axial direction, and the second damping portion 42 is two, respectively spaced between the mounting portion 22 and the two end limiters 32, and the stator 2 is damped in the axial direction, which can reduce the vibration of the stator 2 in the axial direction and improve the mounting stability of the stator 2 and the stator mounting piece 3.

[0072] In some embodiments of the utility model, as shown in Figures 4-6 The first damping portion 41 and the second damping portion 42 are integrally connected, the axial two ends of the first damping portion 41 respectively extend towards the radial inner side with the second damping portion 42, the second damping portion 42 at the axial two ends and the first damping portion 41 form a recess 43, and the mounting portion 22 is inserted into the recess 43, so that the damping structure piece 4 is sleeved outside the mounting portion 22.

[0073] The first damping portion 41 and the second damping portion 42 are integrally connected, which can improve the integrity and structural stability of the damping structure piece 4, and the recess 43 is formed between the first damping portion 41 and the second damping portion 42, the mounting portion 22 is directly inserted into the recess 43 and cooperates with the damping structure piece 4, the damping structure piece 4 is simple in assembly mode, and the assembly efficiency can be improved.

[0074] In some embodiments of the utility model, as shown in Figure 5 , Figure 7 and Figure 8 The first damping portion 41 has a first protrusion 411 protruding towards the direction of the annular ring 31. By arranging the first protrusion 411 on the first damping portion 41, the surface friction of the first damping portion 41 can be increased, the first damping portion 41 is better in contact with the inner circumferential surface of the annular ring 31, and the connection stability of the first damping portion 41 and the annular ring 31 can be improved.

[0075] In some embodiments of the utility model, as shown in Figure 5As shown, the second damping part 42 has a second protrusion 421 protruding towards the direction of the end limiting part 32. By arranging the second protrusion 421 on the second damping part 42, the surface friction of the second damping part 42 can be increased, the second damping part 42 is better in contact with the end limiting part 32, and the connection stability of the second damping part 42 and the end limiting part 32 can be improved.

[0076] In some embodiments of the utility model, as shown in Figure 5 and Figure 8 As shown, at least one of the first damping part 41 and the second damping part 42 is provided with a through hole 412. By arranging the through hole 412 on the first damping part 41 or the second damping part 42, the material usage of the damping structure 4 can be reduced, and the manufacturing cost can be reduced. Moreover, the hardness of the damping structure 4 can be changed, the damping coefficient can be changed, and the vibration isolation and noise reduction effect of the damping structure 4 can be improved.

[0077] It is worth noting that the hardness of the damping structure 4 can be changed, the damping coefficient can be changed, and the vibration isolation and noise reduction effect of the damping structure 4 can be improved by changing the number of the first protrusion 411 or the through hole 412 on the first damping part 41 and by changing the number of the second protrusion 421 or the through hole 412 on the second damping part 42.

[0078] In some embodiments of the utility model, as shown in Figure 5 and Figure 6 As shown, the mounting part 22 comprises a plurality of protrusions 221 protruding from the outer circumferential surface of the stator body 21, the damping structures 4 are provided in one-to-one correspondence with the plurality of protrusions 221, and each of the protrusions 221 is provided with a damping structure 4.

[0079] It is worth noting that the protrusions 221 protrude from the outer circumferential surface of the stator body 21, which means that, in the axial projection of the outer rotor motor 10, the protrusions 221 protrude outside the contour line of the stator body 21 on the projection surface. The stator body 21 can comprise a stator core, a stator coil and a wrapping part, the stator core and the stator coil form a stator assembly, and the wrapping part wraps the stator assembly and defines the outer circumferential surface of the stator body 21. The projection of the outer circumferential surface of the wrapping part is the contour line of the stator body 21.

[0080] The protrusions 221 protrude from the outer circumferential surface of the stator body 21, the stator 2 is fixedly connected with the stator mounting part 3 through the protrusions 221, and the damping structures 4 are respectively arranged on the plurality of protrusions 221. Compared with the case that the entire outer circumferential surface of the stator body 21 is connected with the stator mounting part 3, the cooperation area can be reduced by using several protrusions 221 to cooperate with the stator mounting part 3, and the material usage of the damping structures 4 can be reduced, thereby saving the manufacturing cost.

[0081] In some embodiments of the utility model, as shown in Figure 9And Figure 10 As shown in the drawings, the inner wall of the annular ring 31 has a plurality of limiting grooves 311, which are one-to-one matched with the plurality of protrusions 221.

[0082] By setting the limiting grooves 311 on the inner wall of the annular ring 31 and cooperating with the damping structure 4 on the protrusion 221, the damping structure 4 is limited, so as to limit the relative rotation of the stator 2 and the stator mounting member 3, improve the installation stability of the stator 2, and reduce wear.

[0083] In some embodiments of the utility model, as shown in the drawings, Figure 9 As shown in the drawings, the inner wall of the annular ring 31 is provided with a plurality of positioning ribs 312, which are matched with the first protrusion 411 on the first damping part 41 and / or the second protrusion on the second damping part 42, so as to limit the damping structure, limit the relative rotation of the stator 2 and the stator mounting member 3, improve the installation stability of the stator 2, and reduce wear.

[0084] In some embodiments of the utility model, as shown in the drawings, Figure 1 And Figure 2 As shown in the drawings, the two end limiting members 32 at the axial ends of the annular ring 31 are flanges 321 and end covers 322 respectively, the flange 321 is integrally arranged with the annular ring 31 and protrudes towards the inner ring area of the annular ring 31, and the end cover 322 is assembled and connected with the annular ring 31.

[0085] The flange 321 is arranged on the side of the annular ring 31 close to the rotor 1, and the end cover 322 is connected on the side of the annular ring 31 away from the rotor 1, the flange 321 and the end cover 322 jointly limit the stator mounting member 3 in the axial direction. As shown in the drawings, Figure 12 The flange 321 is integrally arranged with the annular ring 31, which can improve the structural stability of the flange 321 and the annular ring 31.

[0086] It can be understood that the side of the annular ring 31 close to the rotor 1 is arranged with the rotor 1, so the space for arranging the flange 321 is small, the flange 321 is annular and the inner diameter is larger than the outer diameter of the rotor ring 11, the flange 321 limits the stator mounting member 3 and does not interfere with the rotor ring 11; the side of the annular ring 31 away from the rotor 1 has a larger arrangement space, so the end cover 322 is a plate-shaped structure, the end cover 322 covers the annular ring 31 in the axial direction to improve the limiting effect on the stator 2.

[0087] In some embodiments of the utility model, as shown in the drawings, Figure 3 As shown in the drawings, the end cover 322 is fixedly connected with the annular ring 31 through a plurality of fixing screws 37.

[0088] In some embodiments of the utility model, as shown in the drawings, Figure 2 And Figure 11As shown, the flange 321 is arranged close to the rotor 1 relative to the end cover 322, the flange 321 is annular and the inner diameter is greater than the outer diameter of the rotor ring 11, and the second damping part 42 is partially protruded to be opposite to the inner annular area of the flange 321 and is spaced between the mounting part 22 and the rotor ring 11.

[0089] The limiting of the flange 321 to the second damping part 42 does not cause interference to the rotor ring 11, the flange 321 avoids the rotor ring 11 in the radial direction, so the flange 321 does not completely wrap the second damping part 42 in the radial direction, and the second damping part 42 is partially protruded inwardly to the flange 321 in the radial direction, and this part of the second damping part 42 is spaced between the rotor ring 11 and the mounting part 22.

[0090] When the rotor 1 is impacted to move towards the stator 2, the rotor ring 11 abuts on the second damping part 42, and the second damping part 42 can play a damping role to reduce the impact on the rotor ring 11 and improve the working stability of the rotor 1.

[0091] In some embodiments of the utility model, as shown in Figure 11 As shown, the end of the rotor 1 away from the stator 2 is provided with a rotor end plate 12, the axial spacing between the rotor end plate 12 and the stator body 21 is d1, the axial spacing between the part of the second damping part 42 spaced between the mounting part 22 and the rotor 1 and the rotor 1 is d2, the limit compression distance of the second damping part 42 is d0, and d1>d0+d2.

[0092] The second damping part 42 can produce elastic deformation, and the part of the second damping part 42 spaced between the rotor ring 11 and the mounting part 22 can alleviate the vibration impact of the rotor 1 towards the stator 2, thereby improving the working stability of the rotor 1.

[0093] As shown in Figure 2 and Figure 11 The stator body 21 extends into the annular hole of the rotor ring 11, and the stator body 21 is arranged opposite to the rotor end plate 12 in the axial direction. When the rotor 1 is impacted to move towards the stator 2, the axial spacing d2 between the rotor ring 11 and the second damping part 42 is less than the axial spacing d1 between the stator body 21 and the rotor end plate 12, so the rotor ring 11 will first abut on the second damping part 42. The second damping part 42 can produce elastic deformation and is compressed by the rotor ring 11, and the limit compression distance of the second damping part 42 is d0.

[0094] The axial spacing between the rotor end plate 12 and the stator body 21 is d1, which is greater than the sum of the axial spacing d2 between the rotor ring 11 and the second damping part 42 and the limit compression distance d0 of the second damping part 42, so the second damping part 42 will abut the rotor ring 11 and prevent the stator body 21 from impacting on the rotor end plate 12, thereby improving the working stability of the stator 2.

[0095] In some embodiments of the utility model, the limit compression distance d0 of the second damping part 42 is 0.5mm-1.5mm.

[0096] In some embodiments of the utility model, as shown in Figure 1 And Figure 2 The rotor 1 includes the rotor ring 11 and the rotating shaft 13 arranged at the center of the rotor ring 11, the stator body 21 extends into the rotor ring 11, the rotating shaft 13 extends into the shaft hole at the center of the stator body 21, and is in clearance fit with the stator body 21, which is beneficial to improving the reliability of the rotating fit between the rotor 1 and the stator 2.

[0097] In some embodiments of the utility model, as shown in Figure 9 、 Figure 10 And Figure 12 The annular ring 31 includes the circular arc segment 31a and the avoiding part 31b arranged continuously along the circumference, the circular arc segment 31a is an arc of advantage, the avoiding part 31b is located inside the base circle formed by the circular arc segment 31a, the mounting part 22 includes the cutting edge part 22b in shape fit with the avoiding part 31b and opposite in circumference, and the damping structure 4 is opposite in circumference to the circular arc segment 31a to be spaced between the mounting part 22 and the circular arc segment 31a.

[0098] The annular ring 31 includes the circular arc segment 31a and the avoiding part 31b, the circular arc segment 31a is formed into an arc larger than a semicircle, the avoiding part 31b is recessed towards the inside relative to the avoiding part 31b, and the avoiding part 31b is located inside the base circle formed by the circular arc segment 31a.

[0099] The mounting part 22 includes the cutting edge part 22b in shape fit with the avoiding part 31b, so that the mounting part 22 is fit with the annular ring 31, and the stability of the mounting part 22 and the annular ring 31 is improved. The damping structure 4 is spaced between the mounting part 22 and the circular arc segment 31a, and the stator 2 is damped in the radial direction, so that the vibration of the stator 2 in the radial direction is reduced, and the mounting stability of the stator 2 and the stator mounting part 3 is improved.

[0100] In some embodiments of the utility model, as shown in Figure 13 The stator mounting part 3 further includes the protection ring 33, the outer diameter of the protection ring 33 is smaller than the outer diameter of the circular arc segment 31a, the protection ring 33 extends from the annular ring 31 towards the stator body 21, and surrounds the outside of the rotor ring 11 and is in clearance fit with the rotor ring 11.

[0101] The protection ring 33 can protect the inside stator body 21, and can improve the damage to the stator body 21 in the transportation and movement process. After the stator 2 and the rotor 1 are assembled, the protection ring 33 can also protect the inside rotor ring 11, prevent impurities such as water from contacting the inside stator body 21 and the rotor ring 11, and improve the working reliability of the outer rotor motor 10.

[0102] In some embodiments of the utility model, as shown in Figure 10 、 Figure 12 and Figure 16 , the outer wall of the arc segment 31a protrudes with the first mounting ear 34, the second mounting ear 35 and the positioning bolt 36, the avoiding part 31b is located on one side of the central vertical surface S1 of the stator 2, the first mounting ear 34 and the positioning bolt 36 are respectively arranged at the circumferential two ends of the avoiding part 31b, and are located on the same side of the central vertical surface S1 with the avoiding part 31b, the positioning bolt 36 is lower than the first mounting ear 34, and the second mounting ear 35 is located on both sides of the central vertical surface S1 with the avoiding part 31b, and is lower than the central horizontal surface S2 of the stator 2.

[0103] After the stator 2 is fixedly installed on the stator mounting part 3, the stator mounting part 3 is fixedly connected with other structures, so that the stator 2 is stably arranged. The outer wall of the arc segment 31a protrudes with the first mounting ear 34, the second mounting ear 35 and the positioning bolt 36 for fixedly connecting the stator mounting part 3 with other structures, the stator mounting part 3 is installed and positioned through the positioning bolt 36, and then is fixedly connected through the first mounting ear 34 and the second mounting ear 35, forming an assembly process of positioning first and then fixing, which can improve the assembly efficiency and assembly accuracy.

[0104] As shown in Figure 16 , the central vertical surface S1 of the stator 2 is based on the orientation of the stator 2 in the working state, the avoiding part 31b, the first mounting ear 34 and the positioning bolt 36 are located on the same side of the central vertical surface S1 of the stator 2, and the second mounting ear 35 is located on the other side of the central vertical surface S1 of the stator 2. The structure of the avoiding part 31b is not uniform, so that the avoiding part 31b is clamped through the positioning bolt 36 and the first mounting ear 34, which can improve the arrangement stability of the stator mounting part 3.

[0105] In some embodiments of the utility model, as shown in Figure 3 and Figure 10 , the positioning bolt 36 is externally provided with the first damping sleeve 5.

[0106] The first damping sleeve 5 can reduce the vibration of the positioning bolt 36 after insertion, improve the installation stability of the stator mounting part 3 and reduce the wear of the bolt.

[0107] In some embodiments of the utility model, as shown in Figure 3 and Figure 10 , at least one of the first mounting ear 34 and the second mounting ear 35 is provided with the second damping sleeve 6. The second damping sleeve 6 can reduce vibration and improve connection stability.

[0108] Exemplarily, the fasteners respectively pass through the first mounting ear 34 and the second mounting ear 35 to fixedly connect the stator mounting 3, and the second damping sleeve 6 is arranged in at least one of the first mounting ear 34 and the second mounting ear 35, so that the connection stability can be improved and the abrasion can be reduced.

[0109] In some embodiments of the present application, as shown in Figure 10 and Figure 12 The avoiding portion 31b includes a straight tangent edge segment 31b1 extending along a chord of the base circle of the circular arc segment 31a, and the avoiding portion 31b includes a plurality of straight tangent edge segments 31b1, which are sequentially and adjacently arranged in the circumferential direction.

[0110] By arranging the avoiding portion 31b as a plurality of straight tangent edge segments 31b1, the switching of the circular arc segment 31a to the avoiding portion 31b is smoother, the stress concentration is reduced, the structural strength of the annular ring 31 can be ensured, and the risk of deformation of the annular ring 31 is reduced.

[0111] The cross-flow fan 100a according to the second aspect of the present application will be described below with reference to the accompanying drawings.

[0112] According to the cross-flow fan 100a of the embodiment of the present application, as shown in Figure 14 The cross-flow fan 100a includes a fan wheel 70 and a motor, the fan wheel 70 is a cross-flow fan wheel 70a, and the motor is an outer rotor motor 10 according to the first aspect of the present application, the outer rotor motor 10 is arranged at one end of the fan wheel 70 in the axial direction, and the rotor 1 is coaxially arranged with and fixedly connected to the fan wheel 70.

[0113] The outer rotor motor 10 drives the cross-flow fan wheel 70a to rotate, thereby generating flowing air. The outer rotor motor 10 has a shorter axial dimension compared with a conventional inner rotor 1 motor, and can facilitate the assembly and use of the cross-flow fan 100a.

[0114] According to the cross-flow fan 100a of the embodiment of the present application, by arranging the outer rotor motor 10 of the first aspect of the present application, the vibration noise of the cross-flow fan wheel 70a can be reduced, and the working reliability of the cross-flow fan wheel 70a can be improved.

[0115] The air conditioner 1000 according to the third aspect of the present application will be described below with reference to the accompanying drawings.

[0116] According to the air conditioner 1000 of the embodiment of the present application, as shown in Figure 15 The air conditioner 1000 includes a fan 100 and a bottom plate 800, the fan 100 is a cross-flow fan 100a according to the second aspect of the present application, and the outer rotor motor 10 is fixedly mounted to the bottom plate 800 through the stator mounting 3.

[0117] The stator 2 is fixedly installed on the stator mounting member 3, and the stator mounting member 3 is fixedly connected with the bottom plate 800, so that the stator 2 is fixed relative to the bottom plate 800. After the stator 2 and the bottom plate 800 are stably installed, the coaxiality of the rotor ring 11 and the stator 2 is improved, the reliability of the rotation cooperation between the rotor ring 11 and the stator 2 is improved, the friction between the rotor ring 11 and the stator 2 is reduced, the oscillation of the stator 2 is reduced, and the working stability of the air conditioner 1000 is improved.

[0118] According to the air conditioner 1000 in the embodiment of the utility model, the cross-flow fan 100a of the second aspect of the utility model is arranged, and the working reliability of the air conditioner 1000 can be improved.

[0119] In some embodiments of the utility model, as shown in Figure 15 The air conditioner 1000 is an air conditioner hanging machine, the axial direction of the cross-flow fan wheel 70a and the axial direction of the outer rotor motor 10 are both left-right directions, and the axis of the stator 2 is horizontally arranged.

[0120] The air conditioner 1000 is an air conditioner hanging machine, which is convenient to use in a space-limited environment, and the cross-flow fan wheel 70a is arranged, which is conducive to reducing the space occupation of the air conditioner hanging frame in the left-right direction, reducing the volume of the air conditioner 1000, and facilitating the arrangement and use of the air conditioner 1000.

[0121] As shown in Figure 16 The rear plate 81 of the bottom plate 800 forms a giving space 8a (for example, a perforation or a groove, etc.) intruding towards the direction of the outer rotor motor 10 at the position corresponding to the outer rotor motor 10, the outer rotor motor 10 is the outer rotor motor 10 described above, the avoiding part 31b is located at the rear side of the circular arc segment 31a and is arranged corresponding to the giving space 8a, and the refrigerant pipe 900 of the heat exchanger of the air conditioner 1000 is arranged in the giving space 8a.

[0122] In the above technical solution, the avoiding part 31b is formed on the stator mounting member 3 of the outer rotor motor 10, which is equivalent to removing some parts of the motor, saving space to enable the rear plate 81 of the bottom plate 800 to form the giving space 8a intruding towards the avoiding part 31b, so that the giving space 8a does not occupy the outer side space of the rear plate 81 of the bottom plate 800 (i.e. the space on the side of the rear plate 81 of the bottom plate 800 away from the fan 100), so that when the refrigerant pipe 900 is arranged in the giving space 8a, at least part of the refrigerant pipe 900 can also occupy the space within the outer contour range of the rear plate 81 of the bottom plate 800, without occupying the outer side space of the rear plate 81 of the bottom plate 800, thereby improving the cooperation compactness of the fan 100, the bottom plate 800 and the refrigerant pipe 900, and reducing the size of the air conditioner 1000.

[0123] The air conditioner 1000 is an air conditioner hanging machine, the axial direction of the cross-flow fan wheel 70a is the left-right direction, the rear plate 81 of the chassis 800 is located at the rear side of the fan 100, and the rear end of the rear plate 81 of the chassis 800 abuts against the wall for installation, the space 8a is invaded to the front side of the rear surface of the rear plate 81 of the chassis 800, the refrigerant pipe 900 penetrating the space 8a is located at the front side of the rear surface of the rear plate 81 of the chassis 800, and the avoiding part 31b is located at the rear part of the outer peripheral wall of the outer rotor motor 10. The refrigerant pipe 900 penetrating the space 8a is embedded in the rear plate 81 of the chassis 800 instead of protruding at the rear side of the rear end of the rear plate 81 of the chassis 800, so that the space occupation in the front-rear direction of the air conditioner 1000 can be reduced, and the size of the air conditioner 1000 in the front-rear direction can be reduced; and since the refrigerant pipe 900 penetrating the space 8a is not located outside the axial direction of the fan 100, the space occupation in the axial direction of the fan 100 can be reduced, that is, the size of the air conditioner 1000 in the left-right direction can be reduced, and the arrangement and use of the air conditioner 1000 are facilitated.

[0124] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0125] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0126] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0127] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0128] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0129] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An external rotor electric machine characterized by, The application relates to a rotor and a stator. The rotor comprises a rotor ring. The stator comprises a stator body and a mounting part, the stator body extends into the ring hole of the rotor ring, the mounting part is located on the axial outer side of the rotor ring and is connected with the shaft end of the stator body, and at least part of the mounting part protrudes from the outer peripheral surface of the stator body. The stator mounting part is used for fixing the mounting part. The damping structure part is spaced between the mounting part and the stator mounting part.

2. An external rotor electric machine according to claim 1, characterized in that The stator mounting part comprises an annular ring which surrounds the mounting part along the circumference of the stator, and the damping structure part comprises a first damping part which is spaced between the outer peripheral surface of the mounting part and the inner peripheral surface of the annular ring.

3. An external rotor electric machine according to claim 2, characterized in that The stator mounting part further comprises two end limiters which are arranged at the axial two ends of the annular ring, the mounting part is clamped between the two end limiters, and the damping structure part further comprises a second damping part which is spaced between the axial two end faces of the mounting part and the two end limiters.

4. An external rotor electric motor as claimed in claim 3, characterised in that, The first damping part and the second damping part are integrally connected, the axial two ends of the first damping part respectively extend towards the radial inner side and are provided with the second damping part, the second damping part at the axial two ends and the first damping part form a slot, the mounting part is inserted into the slot, and the damping structure part is sleeved outside the mounting part.

5. An external rotor electric machine according to claim 4, characterized in that, The first damping part is provided with a first protrusion which protrudes towards the annular ring, and / or the second damping part is provided with a second protrusion which protrudes towards the end limiter, and / or at least one of the first damping part and the second damping part is provided with a through hole.

6. An external rotor electric motor as claimed in claim 4, characterised in that, The mounting part comprises a protruding block which protrudes from the outer peripheral surface of the stator body, the protruding block is multiple and is arranged in the circumference of the stator, the damping structure part is multiple and is arranged in one-to-one correspondence with the multiple protruding blocks, so that the damping structure part is sleeved on each protruding block.

7. An external rotor electric motor as claimed in claim 6, characterised in that, The inner wall of the annular ring is provided with multiple limiting grooves which are in one-to-one correspondence with the multiple protruding blocks.

8. An external rotor electric motor as claimed in claim 3, characterised in that, The two end limiters at the axial two ends of the annular ring are respectively a flange and an end cover, the flange is integrally arranged with the annular ring and protrudes towards the inner ring area of the annular ring, and the end cover is assembled with the annular ring.

9. An external rotor electric motor as claimed in claim 8, characterised in that, The flange is arranged close to the rotor relative to the end cover, the flange is annular and has an inner diameter greater than the outer diameter of the rotor ring, and part of the second damping part protrudes to the inner ring area of the flange and is spaced between the mounting part and the rotor ring.

10. An external rotor electric machine according to claim 9, characterized in that, The end of the rotor away from the stator is provided with a rotor end plate, the axial spacing between the rotor end plate and the stator body is d1, the axial spacing between the part of the second damping part which is spaced between the mounting part and the rotor ring and the rotor ring is d2, the limit compression distance of the second damping part is d0, and d1>d0+d2.

11. An external rotor electric motor as claimed in claim 2, characterised in that, The annular ring comprises circular arc segments arranged continuously along the circumference and an avoiding portion, the circular arc segments are major arcs, the avoiding portion is inside a base circle formed by the circular arc segments, the mounting portion comprises a cut edge portion which is in shape fit with the avoiding portion and opposite to the avoiding portion in the circumference, the damping structure is opposite to the circular arc segments in the circumference to be spaced between the mounting portion and the circular arc segments.

12. An external rotor electric motor as claimed in claim 11, characterised in that, The stator mounting member further comprises a protection ring, an outer diameter of the protection ring is smaller than an outer diameter of the circular arc segments, the protection ring is connected with the annular ring and surrounds the rotor ring outside, and is in gap fit with the rotor ring.

13. The external rotor electric machine of claim 11, wherein, An outer wall of the circular arc segments protrudes a first mounting ear, a second mounting ear and a positioning plug, the avoiding portion is located at one side of a central vertical plane of the stator, the first mounting ear and the positioning plug are respectively arranged at two ends of the circumference of the avoiding portion, and are located at the same side of the central vertical plane as the avoiding portion, the positioning plug is lower than the first mounting ear, the second mounting ear is located at two sides of the central vertical plane as the avoiding portion, and is lower than a central horizontal plane of the stator.

14. An external rotor electric motor as claimed in claim 13, characterised in that, The positioning plug is sleeved with a first damping sleeve; and / or, at least one of the first mounting ear and the second mounting ear is penetrated by a second damping sleeve.

15. The external rotor electric machine of claim 11, wherein, The avoiding portion comprises straight cut edge segments which extend along chord lines of a base circle where the circular arc segments are located, the avoiding portion comprises a plurality of the straight cut edge segments, and the plurality of the straight cut edge segments are arranged in sequence and abut along the circumference.

16. A cross-flow fan characterized by, Comprise: A wind wheel and a motor, the wind wheel is a cross-flow wind wheel, the motor is an outer rotor motor according to any one of claims 1-15, the outer rotor motor is arranged at an axial end of the wind wheel, and the rotor is coaxially arranged and fixedly connected with the wind wheel.

17. An air conditioner characterized by comprising: Comprise: A fan and a chassis, the fan is a cross-flow fan according to claim 16, and the outer rotor motor is fixedly installed on the chassis through the stator mounting member.

18. The air conditioner of claim 17, wherein The air conditioner is an air conditioner hanging machine, an axial direction of the cross-flow wind wheel is a left-right direction, an axis of the stator is horizontally arranged, a back plate of the chassis forms a space for giving way which invades in a direction towards the outer rotor motor at a position corresponding to the outer rotor motor, the outer rotor motor is an outer rotor motor according to any one of claims 11-15, the avoiding portion is located at a rear side of the circular arc segments and is arranged corresponding to the space for giving way, and a refrigerant pipe of a heat exchanger of the air conditioner is penetrated in the space for giving way.

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