Fan and air conditioner with same

Abstract

The fan comprises a wind wheel and a motor, the wind wheel is a cross-flow wind wheel, the motor is arranged at one axial end of the wind wheel and comprises a stator and a rotor, the rotor and the wind wheel are coaxially arranged and fixedly connected, the rotor comprises a rotor ring and a rotating shaft arranged in the center of the rotor ring, and the rotating shaft is arranged in the center of the rotor ring. The stator comprises a stator body and a bearing, the stator body extends into the rotor ring, the bearing is arranged in the stator body and arranged outside the rotating shaft in a sleeving mode, and a heat dissipation structure is formed on the bearing. According to the fan provided by the utility model, the heat dissipation structure is formed on the bearing, and the heat dissipation structure can accelerate heat dissipation of the bearing, so that the aging speed of the bearing is slowed down, and the service life of the motor is prolonged. And the heat dissipation structure is arranged on the bearing, so that the heat dissipation of the stator is facilitated, the overheating failure of the motor can be reduced, and the working reliability of the motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment, and in particular to a fan and an air conditioner having the same. Background Technology

[0002] Some fans in related technologies include a cross-flow impeller and a drive motor. The drive motor is located at one axial end of the cross-flow impeller, and the drive motor extends a rotating shaft towards the cross-flow impeller. The end of the rotating shaft is connected to the cross-flow impeller to drive the cross-flow impeller to rotate. This type of fan has a large overall axial length and occupies a lot of space. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a fan that uses an external rotor motor with the rotor fixed to a wind turbine, thereby reducing the axial length of the fan. Furthermore, a heat dissipation structure is formed on the bearings within the stator of the motor, which accelerates heat dissipation, slows down bearing aging, improves the coaxiality and stability of the stator and rotor rotation, enhances the reliability of the motor, and extends its service life.

[0004] This utility model also proposes an air conditioner having the above-mentioned fan.

[0005] According to a first aspect of the present invention, a fan includes: a wind turbine, wherein the wind turbine is a cross-flow wind turbine; a motor, wherein the motor is disposed at one axial end of the wind turbine and includes a stator and a rotor, the rotor being coaxially disposed and fixedly connected to the wind turbine, and the rotor including a rotor ring and a rotating shaft disposed at the center of the rotor ring, the stator including a stator body and a bearing, the stator body extending into the rotor ring, the bearing being disposed within the stator body and sleeved outside the rotating shaft, and a heat dissipation structure being formed on the bearing.

[0006] According to this utility model, the axial length of the fan can be reduced by using an external rotor motor and fixing the rotor to the impeller. Furthermore, by forming a heat dissipation structure on the bearings, the heat dissipation structure can accelerate the heat dissipation of the bearings, thereby slowing down the aging of the bearings, improving the coaxiality and stability of the stator and rotor rotational engagement, and thus extending the service life of the motor. Moreover, the heat dissipation structure on the bearings also facilitates the heat dissipation of the stator, reducing the occurrence of motor overheating failure and improving the operational reliability of the motor.

[0007] In some embodiments, the heat dissipation structure includes a heat dissipation groove disposed on the outer surface of the bearing facing the stator body and open in the direction toward the stator body.

[0008] In some embodiments, the heat dissipation groove extends from the side of the bearing away from the impeller to the side of the bearing closer to the impeller.

[0009] In some embodiments, the heat dissipation slots extend along the axial direction of the motor and are provided in multiple circumferentially spaced along the motor.

[0010] In some embodiments, the outer surface of the bearing has ribs that extend along the axial direction of the motor. There are multiple ribs that are spaced apart circumferentially, and the heat dissipation groove is defined between adjacent circumferential ribs.

[0011] In some embodiments, the outer contour of the cross-section of the rib is an outwardly convex curve.

[0012] In some embodiments, the bearing includes a bearing body and a bearing housing. The bearing body is disposed within the bearing housing and engages with the rotating shaft. The center of the stator body has an axially extending shaft hole. The bearing housing is installed within the shaft hole. The heat dissipation groove is disposed on the bearing housing and opens toward the wall of the shaft hole.

[0013] In some embodiments, the bearing housing includes a first housing segment, a second housing segment, and a third housing segment arranged sequentially along the axial direction. The outer diameter of the second housing segment is smaller than the outer diameter of one of the first housing segment and the third housing segment at the end closest to the second housing segment. A locking protrusion protrudes from the shaft hole. The locking protrusion is correspondingly arranged with the second housing segment and is locked axially between the first housing segment and the third housing segment to restrict the axial movement of the bearing housing relative to the stator body.

[0014] In some embodiments, the bearing body is disposed within the first seat section. The first seat section includes a first shaft portion and a first rib protruding from the outer peripheral surface of the first shaft portion. The second seat section includes a second shaft portion and a second rib protruding from the outer peripheral surface of the second shaft portion. The first ribs extend axially and are a plurality of circumferentially spaced ribs. A heat dissipation groove is formed between two circumferentially adjacent first ribs. The second ribs extend axially and are a plurality of circumferentially spaced ribs. A heat dissipation groove is formed between two circumferentially adjacent second ribs. The positions of the plurality of first ribs and the plurality of second ribs are arranged in a one-to-one correspondence in the circumferential direction.

[0015] In some embodiments, the axial length of the first rib is greater than 1 / 2 of the axial length of the first shaft portion; wherein the outer contour of the cross-section of the first rib is an outwardly convex curve; and / or, the first seat segment further includes a thinning rib protruding from the outer peripheral surface of the first shaft portion, the thinning rib being located at one end of the first rib near the second seat segment, the protrusion height of the thinning rib being less than the protrusion height of the first rib, and the protrusion height of the thinning rib gradually decreasing along the direction near the second seat segment; and / or, the first seat segment further includes a widening rib protruding from the outer peripheral surface of the first shaft portion, the widening rib being located at one end of the first rib away from the second seat segment, the circumferential width of the widening rib being greater than the circumferential width of the first rib, the widening ribs being correspondingly arranged one-to-one with the first ribs and forming a flow gap between the circumferentially adjacent widening ribs, the protrusion height of the widening rib being greater than or equal to the protrusion height of the first rib, and the widening rib having an interference fit with the shaft hole.

[0016] In some embodiments, a recess is formed at the end of the first shaft portion near the second seat section. The recess is located within the heat dissipation groove and is formed by a recess in the outer peripheral surface of the first shaft portion. The recess opens toward the second seat section.

[0017] In some embodiments, the axial length of the first seat segment is greater than the axial length of the second seat segment, the bearing body is disposed within the first seat segment, the axial length of the third seat segment is less than the axial length of the second seat segment, and the outer diameter of the third seat segment gradually decreases along the direction away from the first seat segment, so that the side surface of the third seat segment away from the first seat segment is formed as a guide surface.

[0018] In some embodiments, the bearing body is a sliding bearing, the rotating shaft is rotatably clearance-fitted with the sliding bearing, a central through hole is formed in the bearing housing along the axial direction, the central through hole includes a spherical cavity and a cylindrical cavity, there are two cylindrical cavities located on both sides of the spherical cavity, the maximum diameter of the spherical cavity is greater than the diameter of the cylindrical cavity, and the outer surface of the bearing body is spherical and embedded in the spherical cavity.

[0019] In some embodiments, the bearing housing is a vibration-damping material.

[0020] An air conditioner according to a second aspect of the present invention includes a chassis and a fan according to a first aspect of the present invention, wherein the fan is mounted on the chassis.

[0021] According to the air conditioner of this utility model, by incorporating the fan of the first aspect of this utility model, heat dissipation of the bearing can be accelerated, thereby slowing down the aging of the bearing and extending the service life of the motor. Furthermore, the motor has high assembly efficiency and strong structural stability, which can improve the operational reliability of the motor.

[0022] In some embodiments, the air conditioner is a wall-mounted air conditioner, and the axis of the cross-flow fan is in the left-right direction.

[0023] 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

[0024] Figure 1 This is an exploded view of a portion of the structure of a fan according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a bearing according to an embodiment of the present invention;

[0026] Figure 3 This is an axial view of a bearing according to an embodiment of the present invention;

[0027] Figure 4 This is an exploded view of the structure of a bearing according to an embodiment of the present invention;

[0028] Figure 5 This is a partial cross-sectional view of a fan according to an embodiment of the present invention;

[0029] Figure 6 This is an assembly cross-sectional view of the bearing housing and stator body according to an embodiment of the present utility model;

[0030] Figure 7 This is a side view of a bearing according to an embodiment of the present invention;

[0031] Figure 8 This is a structural schematic diagram of a bearing according to one embodiment of the present invention from another angle;

[0032] Figure 9 It is based on Figure 6 A magnified view of region A in the example shown;

[0033] Figure 10 This is a schematic diagram of the structure of a fan and chassis according to an embodiment of the present invention.

[0034] Reference numerals:

[0035] Air conditioner 1000;

[0036] Fan 100;

[0037] Wind turbine 10; Cross-flow wind turbine 10a;

[0038] Motor 20;

[0039] Rotor 3; Rotor ring 31; Shaft 32;

[0040] Stator 4;

[0041] Stator body 41; shaft hole 411; locking protrusion 412;

[0042] Bearing 42; Heat dissipation structure 42a; Heat dissipation groove 42a1; Rib 42b; Bearing body 421; Bearing seat 422; First seat section 422a; First shaft portion 4221; First rib 4222; Thinning rib 4223; Widening rib 4224; Flow gap 4224a; Slot 4225; Second seat section 422b; Second shaft portion 4226; Second rib 4227; Third seat section 422c; Guide surface 422c1; Flow notch 422c2; Central perforation 422d; Spherical cavity 4228; Cylindrical cavity 4229;

[0043] Chassis 500. Detailed Implementation

[0044] 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 intended to explain this utility model, and should not be construed as limiting this utility model.

[0045] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0046] The fan 100 of the first aspect of this utility model is described below with reference to the accompanying drawings.

[0047] According to the embodiment of the present utility model, the fan 100, such as Figure 1 and Figure 2As shown, the fan 100 includes: a fan wheel 10 and a motor 20. The fan wheel 10 is a cross-flow fan wheel 10a. The motor 20 is located at one axial end of the fan wheel 10 and includes a stator 4 and a rotor 3. The rotor 3 is coaxially arranged with the fan wheel 10 and fixedly connected. The rotor 3 includes a rotor ring 31 and a rotating shaft 32 located at the center of the rotor ring 31. The stator 4 includes a stator body 41 and a bearing 42. The stator body 41 extends into the rotor ring 31. The bearing 42 is located inside the stator body 41 and sleeved outside the rotating shaft 32. A heat dissipation structure 42a is formed on the bearing 42.

[0048] The motor 20 is the driving component, driving the cross-flow impeller 10a to rotate along its axis, thereby generating airflow. The motor 20 includes a rotor 3 and a stator 4. When the motor 20 is energized, the magnetic field generated by the stator 4 and the magnetic field generated by the rotor 3 interact, allowing the rotor 3 to rotate relative to the stator 4. The rotor 3 is fixedly connected to the impeller 10, and when the rotor 3 rotates relative to the stator 4, it drives the impeller 10 to rotate.

[0049] The stator body 41 extends into the rotor ring 31. The motor 20 is an external rotor motor. Compared with a traditional internal rotor motor, the gap between the motor 20 and the cross-flow impeller 10a can be eliminated. The axial dimension of the motor 20 after mating with the impeller 10a is shorter, which is beneficial for reducing the size. The bearing 42 is set inside the stator body 41, and the rotating shaft 32 extends into the bearing 42 and is rotatably engaged with the bearing 42, thereby improving the rotational stability between the rotor 3 and the stator 4.

[0050] In related technologies, after the motor is powered on, the stator body will generate heat, which is directly transferred to the rotating shaft inside the stator body. Excessive heat will accelerate the aging of the bearings and shorten the service life of the motor.

[0051] Therefore, in this embodiment of the invention, a heat dissipation structure 42a is formed on the bearing 42 inside the stator 4. The heat dissipation structure 42a can transfer the heat transferred from the stator 4 to the bearing 42, which can accelerate the heat dissipation of the bearing 42, thereby slowing down the aging rate of the bearing 42 and helping to extend the service life of the motor 20. Furthermore, by providing a heat dissipation structure 42a on the bearing 42, it is also beneficial to the heat dissipation of the stator 4, which can reduce the occurrence of overheating failure of the motor 20 and improve the working reliability of the motor 20.

[0052] According to the embodiment of the present invention, the fan 100 uses an external rotor motor and fixes the rotor 3 on the impeller 10, thereby reducing the axial length of the fan 100. Furthermore, by forming a heat dissipation structure 42a on the bearing 42, the heat dissipation structure 42a can accelerate the heat dissipation of the bearing 42, thereby slowing down the aging rate of the bearing 42, improving the coaxiality and stability of the rotational engagement between the stator 4 and the rotor 3, and thus extending the service life of the motor 20. Moreover, by providing the heat dissipation structure 42a on the bearing 42, it also facilitates the heat dissipation of the stator 4, reducing the occurrence of overheating failure of the motor 20 and improving the operational reliability of the motor 20.

[0053] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the heat dissipation structure 42a includes a heat dissipation groove 42a1, which is disposed on the outer surface of the bearing 42 facing the stator body 41 and is open in the direction of the stator body 41.

[0054] The heat dissipation structure 42a includes a heat dissipation groove 42a1. By setting the heat dissipation groove 42a1 on the surface of the bearing 42, a gap can be formed between the bearing 42 and the stator body 41, which can reduce the contact area between the bearing 42 and the stator body 41. The gap allows airflow to pass through, thereby accelerating the heat dissipation of the bearing 42 by increasing the heat exchange efficiency between the stator body 41 and the bearing 42 and the air.

[0055] In some other embodiments of the present invention, the heat dissipation structure 42a includes a heat dissipation groove 42a1, which penetrates the bearing 42 along the axial or radial direction of the bearing 42 to form a channel for air to flow through the bearing 42, thereby increasing the heat exchange efficiency between the bearing 42 and the air and accelerating the heat dissipation of the bearing 42.

[0056] In some embodiments of this utility model, such as Figure 2 As shown, the heat dissipation groove 42a1 extends from the side of the bearing 42 away from the impeller 10 to the side of the bearing 42 near the impeller 10.

[0057] The longer length of the heat dissipation groove 42a1 increases the gap between the bearing 42 and the stator body 41, thereby increasing the airflow and improving the heat dissipation speed of the bearing 42. Furthermore, the heat dissipation groove 42a1 is formed as a through groove extending from the bearing 42 towards the impeller 10. This through groove further facilitates airflow within the groove, thereby improving the heat dissipation speed of both the bearing 42 and the stator body 41.

[0058] It is worth noting that the heat dissipation groove 42a1 can extend along a straight line, a curve, or a spiral, which can be selected according to actual needs.

[0059] Optionally, the heat dissipation groove 42a1 can be a straight groove extending along a straight line; or, alternatively, the heat dissipation groove 42a1 can also be an arc-shaped groove extending along a curve.

[0060] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the heat dissipation slots 42a1 extend along the axial direction of the motor 20, and multiple slots are provided at intervals along the circumference of the motor 20.

[0061] The heat dissipation groove 42a1 is a straight groove extending along the axial direction of the motor 20. The opening of the heat dissipation groove 42a1 is relatively simple and can reduce the manufacturing difficulty.

[0062] By setting multiple heat dissipation slots 42a1, the contact area between air and bearing 42 can be increased, accelerating the heat dissipation of bearing 42; and by setting multiple heat dissipation slots 42a1 at intervals in the circumferential direction, it is beneficial to position the center of gravity of bearing 42 and improve the working stability of bearing 42.

[0063] It is understandable that the bearing 42 is sleeved outside the rotating shaft 32, and the rotating shaft 32 and the bearing 42 cooperate to rotate relative to the stator 4. Therefore, it is best to keep the central axis of the bearing 42, the axis of the stator 4, and the axis of the rotor 3 on the same straight line to improve the rotational stability of the rotor 3.

[0064] In some embodiments of this invention, the circumferential spacing between two adjacent heat dissipation slots 42a1 is consistent. The bearing 42 has a uniform mass, and its center of mass is located in the center position, which can improve the reliability of the fit between the bearing 42 and the rotor 3.

[0065] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the outer surface of the bearing 42 has a rib 42b, which extends along the axial direction of the motor 20. There are multiple ribs 42b, which are spaced apart in the circumferential direction. A heat dissipation groove 42a1 is defined between adjacent circumferential ribs 42b.

[0066] Compared to forming a heat dissipation groove 42a1 by opening two grooves inward on the outer surface of the bearing 42, some embodiments of the present invention provide outwardly protruding ribs 42b on the outer surface of the bearing 42, and the heat dissipation groove 42a1 is defined between two adjacent ribs 42b, which can reduce the manufacturing difficulty of the bearing 42 and reduce the manufacturing cost.

[0067] In some embodiments of this utility model, such as Figure 3 As shown, the outer contour of the cross-section of the rib 42b is an outwardly convex curve.

[0068] The bearing 42 is located inside the stator body 41. The outer contour of the cross section of the rib 42b is an outwardly convex curve, and the outer surface of the rib 42b is an arc-shaped surface. That is, the outer surface of the bearing 42 is an arc-shaped surface. The assembly of the bearing 42 and the stator body 41 is faster, which is conducive to improving assembly efficiency and production efficiency.

[0069] Furthermore, by designing the outer contour of the cross-section of the rib 42b as a convex curve, such as... Figure 3 As shown, the heat dissipation groove 42a1 defined between two adjacent ribs 42b increases in size in the radial outward direction of the bearing 42, which helps to increase the gap volume between the bearing 42 and the stator body 41 and improve the heat dissipation speed of the bearing 42.

[0070] In some embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the bearing 42 includes a bearing body 421 and a bearing housing 422. The bearing body 421 is disposed in the bearing housing 422 and cooperates with the rotating shaft 32. The center of the stator body 41 has a shaft hole 411 extending axially. The bearing housing 422 is installed in the shaft hole 411. The heat dissipation groove 42a1 is disposed on the bearing housing 422 and is open towards the hole wall of the shaft hole 411.

[0071] The bearing body 421 is housed within the bearing housing 422. The bearing body 421 mates with the rotating shaft 32. The shaft 32 extends deep into the bearing 42, improving the rotational stability of the rotor 3 relative to the stator 4 and reducing displacement of the rotor 3 relative to the stator 4. The bearing housing 422 is installed within the shaft hole 411 of the stator 4 and mates with the stator 4. Therefore, the heat dissipation groove 42a1 is provided on the bearing housing 422, reducing the contact area between the bearing housing 422 and the stator 4, decreasing heat transfer from the stator 4 to the bearing 42, and increasing the heat dissipation rate of the bearing housing 422.

[0072] The bearing 42 comprises two parts, allowing the bearing body 421 and the bearing housing 422 to be made of different materials, facilitating flexible design. For example, the bearing housing 422 may be made of rubber to reduce vibration, support the rotation of the bearing body 421, and reduce wear; the bearing body 421 may be made of plastic to improve operational stability and reduce wear.

[0073] In some embodiments of this utility model, such as Figure 6 and Figure 7As shown, the bearing housing 422 includes a first housing section 422a, a second housing section 422b, and a third housing section 422c arranged sequentially along the axial direction. The outer diameter of the second housing section 422b is smaller than the outer diameter of the end of either the first housing section 422a or the third housing section 422c closest to the second housing section 422b. A locking protrusion 412 protrudes from the shaft hole 411. The locking protrusion 412 is correspondingly arranged with the second housing section 422b and is locked along the axial direction between the first housing section 422a and the third housing section 422c to restrict the axial movement of the bearing housing 422 relative to the stator body 41.

[0074] The outer diameter of the end of the third housing segment 422c closest to the second housing segment 422b is larger than the outer diameter of the second housing segment 422b, and the outer diameter of the end of the first housing segment 422a closest to the second housing segment 422b is larger than the outer diameter of the second housing segment 422b. When the bearing housing 422 is installed in place, if... Figure 6 As shown, the axial end face of the locking protrusion 412 facing the first seat section 422a abuts against the axial end face of the first seat section 422a, and the axial end face of the locking protrusion 412 facing the third seat section 422c abuts against the axial end face of the third seat section 422c, thereby restricting the axial movement of the bearing housing 422 relative to the stator body 41. The locking protrusion 412 provided in the shaft hole 411 limits the bearing housing 422, which can prevent the bearing housing 422 from coming out of the shaft hole 411 axially, thereby improving the assembly stability of the bearing 42 and the stator body 41.

[0075] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, in the direction from the impeller 10 to the motor 20, the first bearing housing 422a, the second bearing housing 422b, and the third bearing housing 422c are arranged sequentially. The axial dimension of the third bearing housing 422c is smaller than that of the first bearing housing 422a. The bearing housing 422 is inserted axially into the shaft hole 411 of the stator body 41. The third bearing housing 422c is inserted into the shaft hole 411 from the end of the shaft hole 411 closest to the impeller 10 until the second bearing housing 422b is locked by the locking protrusion 412, which indicates that the bearing 42 is installed in place.

[0076] Since the outer diameter of the end of the third seat section 422c that is closer to the second seat section 422b is larger than the outer diameter of the second seat section 422b, the third seat section 422c will provide a force feedback after passing through the locking protrusion 412, indicating that the bearing 42 is installed in place, which is beneficial to improving assembly efficiency and finished product qualification rate.

[0077] In some embodiments of the present invention, Figure 7 and Figure 8As shown, the bearing body 421 is disposed within the first seat section 422a. The first seat section 422a includes a first shaft portion 4221 and a first rib 4222 protruding from the outer peripheral surface of the first shaft portion 4221. The second seat section 422b includes a second shaft portion 4226 and a second rib 4227 protruding from the outer peripheral surface of the second shaft portion 4226. The first ribs 4222 extend axially and are a plurality of ribs spaced circumferentially. A heat dissipation groove 42a1 is formed between two circumferentially adjacent first ribs 4222. The second ribs 4227 extend axially and are a plurality of ribs spaced circumferentially. A heat dissipation groove 42a1 is formed between two circumferentially adjacent second ribs 4227. The positions of the plurality of first ribs 4222 and the plurality of second ribs 4227 are arranged one-to-one in the circumferential direction.

[0078] The first shaft portion 4221 is configured as a shaft extending along the axial direction of the motor 20. The outer surface of the first shaft portion 4221 has a first rib 4222. The first rib 4222 extends along the axial direction of the motor 20. There are multiple first ribs 4222 and they are spaced apart in the circumferential direction. A heat dissipation groove 42a1 extending along the axial direction of the motor 20 is defined between circumferentially adjacent first ribs 4222.

[0079] Correspondingly, the second shaft portion 4226 is configured as a shaft extending along the axial direction of the motor 20. The outer surface of the second shaft portion 4226 has a second rib 4227. The second rib 4227 extends along the axial direction of the motor 20. There are multiple second ribs 4227 and they are spaced apart in the circumferential direction. A heat dissipation groove 42a1 extending along the axial direction of the motor 20 is defined between circumferentially adjacent second ribs 4227.

[0080] The heat dissipation grooves 42a1 formed on the first segment 422a and the heat dissipation grooves 42a1 formed on the second segment 422b are correspondingly arranged in the axial direction of the motor 20 and connected, so that air can flow into the corresponding part of the second segment 422b from at least the end of the first segment 422a, thereby improving the heat exchange efficiency of the stator body 41 and the bearing 42.

[0081] In some embodiments of the present invention, Figure 7 and Figure 8 As shown, an overcurrent notch 422c2 is provided on the third section 422c, and the overcurrent notch 422c2 and the heat dissipation slot 42a1 on the second section 422b are positioned in a circumferential direction corresponding to each other.

[0082] Therefore, the heat dissipation groove 42a1 formed on the first section 422a, the heat dissipation groove 42a1 formed on the second section 422b, and the flow passage 422c2 on the third section 422c extend from the side of the bearing 42 away from the impeller 10 to the side of the bearing 42 near the impeller 10, which is conducive to the flow of air between the bearing 42 and the stator body 41, thereby improving the heat dissipation speed of the bearing 42 and the stator body 41.

[0083] In some embodiments of the present invention, Figure 7 As shown, the axial length of the first rib 4222 is greater than 1 / 2 of the axial length of the first shaft portion 4221, such as... Figure 8 As shown, the outer contour of the cross-section of the first rib 4222 is an outwardly convex curve.

[0084] The first rib 4222 protrudes from the outer peripheral surface of the first shaft portion 4221. The relatively long axial length of the first rib 4222 can improve the fit stability between the bearing 42 and the stator body 41. The first rib 4222 is directly opposite the hole wall of the shaft hole 411. The outer contour of the cross-section of the first rib 4222 is set as an outwardly convex curve. The contact area between the first rib 4222 and the hole wall of the shaft hole 411 is small, which facilitates the assembly of the bearing 42 into the shaft hole 411 and can improve assembly efficiency.

[0085] In some embodiments of the present invention, Figure 7 and Figure 8 As shown, the first seat section 422a also includes a thinning rib 4223 protruding from the outer peripheral surface of the first shaft portion 4221. The thinning rib 4223 is located at one end of the first rib 4222 near the second seat section 422b. The protrusion height of the thinning rib 4223 is less than the protrusion height of the first rib 4222, and the protrusion height of the thinning rib 4223 gradually decreases along the direction near the second seat section 422b.

[0086] It is worth noting that the protrusion height of the thinning rib 4223 is based on the outer peripheral surface of the bearing seat 422, indicating the size of the thinning rib 4223 or the first rib 4222 protruding radially from the outer peripheral surface of the first shaft portion 4221.

[0087] Thinning ribs 4223 and first ribs 4222 are provided in a one-to-one correspondence. Thinning ribs 4223 are connected to the end of the first rib 4222 near the second seat section 422b. By setting thinning ribs 4223, a smooth transition can be formed between the first rib 4222 and the second seat section 422b, improving the integrity of the bearing seat 422 and facilitating the forming of the bearing seat 422.

[0088] In some embodiments of this utility model, in the direction from the impeller 10 to the motor 20, the first seat section 422a, the second seat section 422b, and the third seat section 422c are arranged sequentially. The bearing seat 422 is inserted into the shaft hole 411 of the stator body 41 along the axial direction. The third seat section 422c is inserted into the shaft hole 411 from the end of the shaft hole 411 near the impeller 10 until the second seat section 422b is locked by the locking protrusion 412, which indicates that the bearing 42 is installed in place.

[0089] By setting the thinning rib 4223 to have a protrusion height that gradually decreases along the direction close to the second seat section 422b, it can guide the installation of the bearing seat 422, making the assembly of the bearing seat 422 and the stator body 41 faster, which is conducive to improving assembly efficiency and production efficiency.

[0090] In some embodiments of this utility model, such as Figure 7 and Figure 8 As shown, the first seat section 422a also includes a widening rib 4224 protruding from the outer peripheral surface of the first shaft portion 4221. The widening rib 4224 is located at the end of the first rib 4222 away from the second seat section 422b. The circumferential width of the widening rib 4224 is greater than the circumferential width of the first rib 4222. The widening ribs 4224 and the first rib 4222 are arranged in a one-to-one correspondence and are circumferentially adjacent to each other, forming a flow gap 4224a. The protrusion height of the widening rib 4224 is greater than or equal to the protrusion height of the first rib 4222. The widening rib 4224 is interference-fitted with the shaft hole 411.

[0091] The widening ribs 4224 and the first convex ribs 4222 are arranged in a one-to-one correspondence, and an overflow gap 4224a is formed between the circumferentially adjacent widening ribs 4224, so that air can flow into the corresponding part of the second seat section 422b from at least the end of the first seat section 422a, thereby improving the heat exchange efficiency of the stator body 41 and the bearing 42.

[0092] The circumferential width of the widening rib 4224 is greater than the circumferential width of the first rib 4222, and the protrusion height of the widening rib 4224 is greater than the protrusion height of the first rib 4222. When the bearing seat 422 is inserted into the shaft hole 411, the widening rib 4224 and the shaft hole 411 are interference-fitted, which can improve the fit stability between the bearing 42 and the stator body 41, thereby limiting the movement of the bearing seat 422 relative to the stator body 41.

[0093] In some embodiments of this utility model, such as Figure 8 As shown, the outer contour of the cross-section of the second rib 4227 is an outwardly convex curve. Similarly, the second rib 4227 is directly opposite the wall of the shaft hole 411. By setting the outer contour of the cross-section of the second rib 4227 as an outwardly convex curve, the contact area between the second rib 4227 and the wall of the shaft hole 411 is small, which facilitates the assembly of the bearing 42 into the shaft hole 411 and can improve assembly efficiency.

[0094] In some embodiments of this utility model, the first rib 4222 has a large protrusion height. When the bearing seat 422 is inserted into the shaft hole 411, the first rib 4222 and the shaft hole 411 are interference-fitted, which can further improve the fit stability between the bearing 42 and the stator body 41, so as to limit the movement of the bearing seat 422 relative to the stator body 41.

[0095] In some other embodiments of this utility model, the second rib 4227 has a larger protrusion height. When the bearing seat 422 is inserted into the shaft hole 411, the second rib 4227 and the locking protrusion 412 are interference-fitted, which can further improve the fit stability between the bearing 42 and the stator body 41.

[0096] In some embodiments of this utility model, such as Figure 9 As shown, the first rib 4222 has a larger protrusion height, and the second rib 4227 also has a larger protrusion height. When the bearing housing 422 is inserted into the shaft hole 411, the widened rib 4224 has an interference fit with the shaft hole 411, and the first rib 4222 also has an interference fit with the shaft hole 411, while the second rib 4227 also has an interference fit with the locking protrusion 412, which can improve the fit stability between the bearing 42 and the stator body 41. By setting the outer contour of the cross-section of the first rib 4222 and the outer contour of the cross-section of the second rib 4227 as an outwardly convex curve, the assembly efficiency of the bearing housing 422 and the stator body 41 can be improved. Furthermore, the axial end face of the locking protrusion 412 facing the first seat section 422a abuts against the axial end face of the first seat section 422a, and the axial end face of the locking protrusion 412 facing the third seat section 422c abuts against the axial end face of the third seat section 422c, thereby restricting the axial movement of the bearing housing 422 relative to the stator body 41, and further improving the installation stability of the bearing 42.

[0097] In some embodiments of this utility model, such as Figure 7 and Figure 8 As shown, a groove 4225 is formed at the end of the first shaft portion 4221 near the second seat section 422b. The groove 4225 is located inside the heat dissipation groove 42a1 and is formed by a recess in the outer peripheral surface of the first shaft portion 4221. The groove 4225 is open toward the second seat section 422b.

[0098] The second seat section 422b is correspondingly provided with the locking protrusion 412, and the axial end face of the locking protrusion 412 facing the first seat section 422a abuts against the axial end face of the first seat section 422a, thereby reducing the gap between the bearing seat 422 and the inner wall of the shaft hole 411 at the locking protrusion 412. Therefore, a groove 4225 is formed at the end of the first shaft portion 4221 near the second seat section 422b. The groove 4225 is formed in the heat dissipation groove 42a1 formed in the first seat section 422a, and the groove 4225 is axially connected to the heat dissipation groove 42a1 formed in the second seat section 422b, thereby connecting the heat dissipation groove 42a1 formed in the first seat section 422a and the heat dissipation groove 42a1 formed in the second seat section 422b, which is beneficial to improving the heat dissipation speed of the bearing 42.

[0099] In some embodiments of this utility model, such as Figure 8As shown, the outer peripheral surface of the second shaft portion 4226 and the bottom of the groove 4225 are located on the same surface, which facilitates the connection between the groove 4225 and the heat dissipation groove 42a1 formed by the second seat section 422b, and can improve the structural stability of the bearing seat 422.

[0100] In some embodiments of the present invention, Figure 7 and Figure 9 As shown, the axial length of the first seat section 422a is greater than the axial length of the second seat section 422b. The bearing body 421 is disposed inside the first seat section 422a. The axial length of the third seat section 422c is less than the axial length of the second seat section 422b. The outer diameter of the third seat section 422c gradually decreases along the direction away from the first seat section 422a, so that the side surface of the third seat section 422c away from the first seat section 422a is formed as a guide surface 422c1.

[0101] In the direction from the impeller 10 to the motor 20, the first bearing housing 422a, the second bearing housing 422b, and the third bearing housing 422c are arranged sequentially. Among the first bearing housing 422a, the second bearing housing 422b, and the third bearing housing 422c, the third bearing housing 422c has the smallest axial dimension. Therefore, when the bearing housing 422 is inserted axially into the shaft hole 411 of the stator body 41, the third bearing housing 422c is inserted into the shaft hole 411 from the end of the shaft hole 411 closest to the impeller 10 until the second bearing housing 422b is locked by the locking protrusion 412, which indicates that the bearing 42 is installed in place.

[0102] By setting the outer diameter of the third seat section 422c to gradually decrease along the direction away from the first seat section 422a, the surface of the third seat section 422c away from the first seat section 422a is formed as a guide surface 422c1, which can guide the installation of the bearing housing 422. The assembly of the bearing housing 422 and the stator body 41 is faster, which is conducive to improving assembly efficiency and production efficiency.

[0103] In some embodiments of the present invention, Figure 4 and Figure 9 As shown, the bearing body 421 is a sliding bearing, and the rotating shaft 32 is rotatably clearance-fitted with the sliding bearing. A central through hole 422d is formed in the bearing housing 422, which includes a spherical cavity 4228 and a cylindrical cavity 4229. There are two cylindrical cavities 4229 located on both sides of the axial direction of the spherical cavity 4228. The maximum diameter of the spherical cavity 4228 is larger than the diameter of the cylindrical cavity 4229. The outer surface of the bearing body 421 is spherical and is embedded in the spherical cavity 4228.

[0104] The diameters of the spherical cavity 4228 and the cylindrical cavity 4229 are both larger than that of the rotating shaft 32. The rotating shaft 32 is inserted into the sliding bearing and is clearance-fitted with the sliding bearing. Compared with setting the rolling bearing 42 in the shaft hole 411, the assembly of the rotating shaft 32 and the sliding bearing is faster, which is conducive to improving assembly efficiency and production efficiency.

[0105] In some embodiments of the present invention, Figure 4 As shown, the bearing body 421 is a ball bearing, which is housed within a spherical cavity 4228. When the shaft 32 is inserted into the bearing body 421, the ball bearing 42 can be rotated to finely adjust its angle, allowing the shaft 32 to be inserted quickly, thus improving assembly efficiency and reducing assembly difficulty.

[0106] In some embodiments of this utility model, the bearing housing 422 is a vibration-damping material component. The bearing housing 422 being a vibration-damping material component can reduce vibration and is beneficial for reducing wear.

[0107] Furthermore, the bearing housing 422 is made of vibration damping material, and the bearing housing 422 can undergo elastic deformation, which facilitates the installation of the bearing housing 422 onto the stator body 41 and can improve the connection stability after the bearing housing 422 is assembled.

[0108] The air conditioner 1000 of the second aspect of this utility model is described below with reference to the accompanying drawings.

[0109] According to an embodiment of the present utility model, the air conditioner 1000, such as Figure 10 As shown, the air conditioner 1000 includes a fan 100 and a chassis 500. The fan 100 is the fan 100 according to the first aspect of this utility model, and the fan 100 is mounted on the chassis 500.

[0110] According to the air conditioner 1000 of this utility model embodiment, by providing the fan 100 of the first aspect of this utility model, the heat dissipation of the bearing 42 can be accelerated, thereby slowing down the aging rate of the bearing 42 and helping to extend the service life of the motor 20. Furthermore, the motor 20 has high assembly efficiency and strong structural stability, which can improve the operational reliability of the motor 20.

[0111] In some embodiments of the present invention, Figure 10 As shown, air conditioner 1000 is a wall-mounted air conditioner, and the axis of the cross-flow fan 10a is in the left-right direction.

[0112] Air conditioner 1000 is a wall-mounted air conditioner, which is convenient for use in environments with limited space. By setting the aforementioned motor 20, the axial dimension of motor 20 can be shortened, which helps to reduce the space occupied by the wall-mounted air conditioner in the left and right directions, and helps to reduce the size of air conditioner 1000, making it easier to arrange and use air conditioner 1000.

[0113] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0114] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0115] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0116] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0118] 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. A fan, characterized in that, include: Wind turbine, wherein the wind turbine is a cross-flow wind turbine; The motor is located at one axial end of the wind turbine and includes a stator and a rotor. The rotor is coaxially arranged and fixedly connected to the wind turbine. The rotor includes a rotor ring and a rotating shaft located at the center of the rotor ring. The stator includes a stator body and a bearing. The stator body extends into the rotor ring. The bearing is located inside the stator body and sleeved outside the rotating shaft. A heat dissipation structure is formed on the bearing.

2. The fan according to claim 1, characterized in that, The heat dissipation structure includes a heat dissipation groove, which is disposed on the outer surface of the bearing facing the stator body and is open in the direction of the stator body.

3. The fan according to claim 2, characterized in that, The heat dissipation groove extends from the side of the bearing furthest from the impeller to the side of the bearing closest to the impeller.

4. The fan according to claim 3, characterized in that, The heat dissipation grooves extend along the axial direction of the motor and are arranged in multiple circumferentially along the motor.

5. The fan according to claim 4, characterized in that, The bearing has raised ribs on its outer surface. The raised ribs extend along the axial direction of the motor. There are multiple raised ribs that are spaced apart circumferentially. The heat dissipation groove is defined between adjacent raised ribs in the circumferential direction.

6. The fan according to claim 5, characterized in that, The cross-sectional outer contour of the rib is an outwardly convex curve.

7. The fan according to claim 2, characterized in that, The bearing includes a bearing body and a bearing housing. The bearing body is disposed in the bearing housing and cooperates with the rotating shaft. The center of the stator body has a shaft hole extending axially. The bearing housing is installed in the shaft hole. The heat dissipation groove is disposed on the bearing housing and is open towards the hole wall of the shaft hole.

8. The fan according to claim 7, characterized in that, The bearing housing includes a first housing section, a second housing section, and a third housing section arranged sequentially along the axial direction. The outer diameter of the second housing section is smaller than the outer diameter of the end of either the first housing section or the third housing section closest to the second housing section. A locking protrusion protrudes from the shaft hole. The locking protrusion is arranged corresponding to the second housing section and is locked axially between the first housing section and the third housing section to restrict the axial movement of the bearing housing relative to the stator body.

9. The fan according to claim 8, characterized in that, The bearing body is disposed within the first seat section. The first seat section includes a first shaft portion and a first rib protruding from the outer peripheral surface of the first shaft portion. The second seat section includes a second shaft portion and a second rib protruding from the outer peripheral surface of the second shaft portion. The first ribs extend axially and are a plurality of ribs spaced apart circumferentially. A heat dissipation groove is formed between two circumferentially adjacent first ribs. The second ribs extend axially and are a plurality of ribs spaced apart circumferentially. A heat dissipation groove is formed between two circumferentially adjacent second ribs. The positions of the plurality of first ribs and the plurality of second ribs are arranged one-to-one in the circumferential direction.

10. The fan according to claim 9, characterized in that, The axial length of the first protruding rib is greater than 1 / 2 of the axial length of the first shaft portion; Wherein, the outer contour of the cross-section of the first rib is an outwardly convex curve; And / or, the first seat segment further includes a thinning rib protruding from the outer peripheral surface of the first shaft portion, the thinning rib being located at one end of the first rib near the second seat segment, the protrusion height of the thinning rib being less than the protrusion height of the first rib, and the protrusion height of the thinning rib gradually decreasing along the direction near the second seat segment; And / or, the first seat section further includes a widening rib protruding from the outer peripheral surface of the first shaft portion. The widening rib is located at the end of the first rib away from the second seat section. The circumferential width of the widening rib is greater than the circumferential width of the first rib. The widening ribs are arranged in a one-to-one correspondence with the first ribs and are circumferentially adjacent to each other to form a flow gap. The protrusion height of the widening rib is greater than or equal to the protrusion height of the first rib. The widening rib is interference-fitted with the shaft hole.

11. The fan according to claim 9, characterized in that, A recessed groove is formed at the end of the first shaft near the second seat section. The recessed groove is located inside the heat dissipation groove and is formed by a recess in the outer peripheral surface of the first shaft. The recessed groove is open toward the second seat section.

12. The fan according to claim 8, characterized in that, The axial length of the first seat segment is greater than the axial length of the second seat segment, the bearing body is disposed in the first seat segment, the axial length of the third seat segment is less than the axial length of the second seat segment, and the outer diameter of the third seat segment gradually decreases along the direction away from the first seat segment, so that the surface of the third seat segment away from the first seat segment is formed as a guide surface.

13. The fan according to claim 7, characterized in that, The bearing body is a sliding bearing, and the rotating shaft is rotatably clearance-fitted with the sliding bearing. A central through hole is formed in the bearing housing along the axial direction. The central through hole includes a spherical cavity and a cylindrical cavity. There are two cylindrical cavities located on both sides of the spherical cavity. The maximum diameter of the spherical cavity is larger than the diameter of the cylindrical cavity. The outer surface of the bearing body is spherical and is embedded in the spherical cavity.

14. The fan according to any one of claims 7-13, characterized in that, The bearing housing is made of vibration-damping material.

15. An air conditioner, characterized in that, include: The chassis and the fan according to any one of claims 1-14, wherein the fan is mounted on the chassis.

16. The air conditioner according to claim 15, characterized in that, The air conditioner is a wall-mounted air conditioner, and the axis of the cross-flow fan is in the left-right direction.

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