Fan and air conditioner

Abstract

The fan comprises a rotating assembly and a stator, the rotating assembly comprises fan blades, a rotor and a rotating shaft, the fan blades and the rotor are of an integrated structural part, the fan blades are located at one end of the rotor in the axial direction, the rotating shaft comprises a first shaft section, and the first shaft section is connected to the end, away from the rotor, of the fan blades; the stator is annular and is arranged around the periphery of the rotor. The fan is simple in assembly process, compact in structure, capable of saving axial installation space and good in installability.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a fan and air conditioner of a kind of fan. BACKGROUND

[0002] In the existing fan, motor structure and fan blade are usually designed in split type, when assembling, fan blade needs to be installed to the rotating shaft of motor structure, and is fixed by locking device, production process is complex, and the axial space occupied by fan whole is larger, and installability is poorer. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved. To this end, the utility model provides a kind of fan, assembly procedure is simple, compact structure, can save axial installation space, and installability is good.

[0004] The utility model further provides a kind of air conditioner with the above-mentioned fan.

[0005] According to the fan of the first aspect embodiment of the utility model, including rotating assembly, including fan blade, rotor and rotating shaft, the fan blade and the rotor are integrated structural member, and the fan blade is located at the end of the rotor along the axial direction, the rotating shaft includes first shaft section, and the first shaft section is connected to the end of the fan blade away from the rotor;Stator, annular and around the outer periphery of the rotor is arranged.

[0006] According to the fan of the first aspect embodiment of the utility model, at least has following beneficial effect: by making fan blade and rotor set as integrated structural member, when assembling fan, fan blade does not need to be installed to rotating shaft and locked by locking device, effectively simplifies the assembly procedure of fan, assembly procedure is simple, and it is favorable to improve assembly efficiency. At the same time, make fan blade connect to the end of rotor along the axial direction, so that the shaft section between rotor and fan blade in rotating shaft is saved, the axial structure of fan is more compact, effectively saves the axial installation space of fan, reduces installation difficulty, improves installability.

[0007] According to some embodiments of the utility model, the rotor is annular and is provided with an inner cavity, and an end of the inner cavity away from the fan blade has an opening.

[0008] According to some embodiments of the utility model, the rotating assembly further includes a support member, the support member is connected to the inner peripheral wall of the inner cavity and connected with the rotating shaft, and the support member, the fan blade and the rotor are integrated structural members.

[0009] According to some embodiments of the utility model, the support member divides the inner cavity into a first cavity and a second cavity arranged in sequence along the axial direction, the support member is provided with at least one through hole, and the through hole communicates the first cavity and the second cavity.

[0010] According to some embodiments of the present application, the rotating shaft further comprises a second shaft segment coaxially arranged with the first shaft segment, and the second shaft segment is connected with the support.

[0011] According to some embodiments of the present application, the fan further comprises a first bearing and a second bearing, the first bearing is mounted on the first shaft segment and rotationally cooperates with the first shaft segment, and the second bearing is mounted on the second shaft segment and rotationally cooperates with the second shaft segment.

[0012] According to some embodiments of the present application, the rotating shaft, the fan blade and the rotor are an integral structure.

[0013] According to some embodiments of the present application, the stator is provided with an opening at each end along the axial direction, and the inner circumferential wall of the stator and the outer circumferential wall of the rotor are spaced apart in the radial direction of the rotor and define a first heat dissipation channel, and the two ends of the first heat dissipation channel extend to the openings at the two ends of the stator respectively.

[0014] According to some embodiments of the present application, along the radial direction, the maximum outer diameter of the fan blade is greater than the maximum outer diameter of the rotor, the fan blade and the stator are spaced apart in the axial direction and define a second heat dissipation channel, and the second heat dissipation channel communicates with the first heat dissipation channel.

[0015] According to some embodiments of the present application, along the axial direction, the maximum length of the rotor is greater than the maximum length of the stator, and the two ends of the rotor protrude from the two end faces of the stator respectively.

[0016] According to some embodiments of the present application, the rotor is an injection molded magnet.

[0017] The air conditioner according to the second aspect of the present application comprises the fan according to the first aspect of the present application.

[0018] The air conditioner according to the second aspect of the present application has at least the following beneficial effects: due to the adoption of the above fan, the fan blade and the rotor are arranged as an integral structure, and when assembling the fan, the fan blade does not need to be mounted to the rotating shaft and locked by the locking device, thereby effectively simplifying the assembly process of the fan, the assembly process is simple, and the assembly efficiency is improved. At the same time, the fan blade is connected to one end of the rotor along the axial direction, thereby eliminating the shaft segment between the rotor and the fan blade in the rotating shaft, the axial structure of the fan is more compact, the axial installation space of the fan is effectively saved, the installation difficulty is reduced, and the installability is improved.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a cross-sectional view of a wind turbine in the prior art;

[0022] Figure 2 This is a cross-sectional view of the fan in an embodiment of this utility model;

[0023] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0024] Figure label:

[0025] Rotating assembly 100; fan blade 110; rotor 120; support member 122; through hole 1221; inner cavity 123; first cavity 1231; second cavity 1232; rotating shaft 130; first shaft section 131; second shaft section 132; first bearing 140; second bearing 150;

[0026] Stator 200; First heat dissipation channel 210; Second heat dissipation channel 220;

[0027] Motor 300; stator assembly 310; cavity 311; rotor assembly 320; rotor shaft 330; motor bearing 340;

[0028] Wind turbine 400; shaft 410; limit ring 420; locking device 430; support bearing 440. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as setting, installing, connecting, assembling, and cooperating should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Reference Figure 1 As shown, Figure 1 The structure shown is a prior art fan structure, including a motor 300 and a fan wheel 400. The motor 300 includes a stator assembly 310, a rotor assembly 320, and a rotor shaft 330. The stator assembly 310 has a cavity 311. The rotor assembly 320 is rotatably mounted in the cavity 311 of the stator assembly 310. The rotor shaft 330 is fixedly connected to the rotor assembly 320 and is mounted to the stator assembly 310 via two motor 300 bearings. One end of the rotor shaft 330 extends outside the stator assembly 310. One end of the fan wheel 400 is mounted on the section of the rotor shaft 330 extending outside the stator assembly 310 and is fixed to the rotor shaft 330 via a limiting ring 420 and a locking device 430. The other end of the fan wheel 400 has a shaft portion 410, which is mounted to an air conditioner bracket (not shown) via a support bearing 440. The shaft portion 410 and the support bearing 440 are rotatably engaged. This is how the motor 300 drives the wind turbine 400 to rotate.

[0034] Therefore, in existing wind turbines, the impeller 400 and motor 300 are separate designs. During assembly, the impeller 400 needs to be installed onto the motor 300 rotor shaft 330 and secured using a locking device 430. This process is complex and inefficient. Furthermore, a section of the rotor shaft 330 exists between the rotor assembly 320 and the impeller 400, and this section relies on the motor 300 bearings for support. This results in a large axial space occupied by the wind turbine, increasing installation difficulty and improving installability. Additionally, the wind turbine requires a large number of bearings—two motor 300 bearings and one support bearing 440—leading to high costs.

[0035] Therefore, referring to Figure 2 and Figure 3As shown, the utility model discloses a fan, be applied to the indoor unit of air conditioner, provide power for realizing indoor air circulation, namely realize the air supply of indoor unit. Fan includes rotating assembly 100 and stator 200.

[0036] It can be understood that the stator 200 is generally annular and has an inner hole in the middle, and the stator 200 generally includes a stator core and a winding wound on the stator core, which can generate a magnetic field after being energized.

[0037] Referring to Figure 2 As shown, it can be understood that the rotating assembly 100 includes a fan blade 110, a rotor 120 and a rotating shaft 130. Among them, the outer shape of the rotor 120 is approximately cylindrical, and the rotor 120 is rotatably installed in the inner hole of the stator 200, that is, the stator 200 is arranged around the outer periphery of the rotor 120. The rotor 120 has a rotating axis, and the direction of the rotating axis of the rotor 120 is the axial direction of the rotor 120, and the direction around the rotating axis of the rotor 120 is the circumferential direction of the rotor 120. It is easy to understand that the rotor 120 is an injection molded magnet and has magnetism, and the magnetic field generated by the stator assembly 310 can drive the rotor 120 to rotate after the winding is energized.

[0038] Specifically, the rotor 120 is an injection molded magnet, specifically, the rotor 120 is composed of plastic powder and magnetic powder, and is obtained by injection molding process. That is, the plastic powder and the magnetic powder are mixed and heated, and then the mixed material is injected into the mold, and the rotor 120 is obtained after cooling. It is easy to understand that the rotor 120 of this structure is a structure without magnetic yoke and magnetic tile, and the magnetic field of the rotor 120 is continuous in the circumferential direction of the rotor 120, which is beneficial to weaken the no-load harmonic and reduce the torque fluctuation, thereby effectively reducing the noise.

[0039] Referring to Figure 2 As shown, it can be understood that the outer shape of the fan blade 110 is also cylindrical. The central axis of the fan blade 110 coincides with the rotating axis of the rotor 120. The fan blade 110 is located at one end of the stator 200 along the axial direction of the rotor 120, and along the axial direction of the rotor 120, one end of the fan blade 110 is connected with one end of the rotor 120. Therefore, when the rotor 120 rotates, the rotor 120 and the fan blade 110 rotate synchronously to realize air supply. Generally speaking, the maximum outer diameter of the fan blade 110 is greater than the maximum outer diameter of the stator 200 to meet the performance requirements of large air volume.

[0040] Referring to Figure 2As shown, it can be understood that the rotating shaft 130 is connected with the rotor 120 and the fan blade 110, and the central axis of the rotating shaft 130 coincides with the rotating axis of the rotor 120 and the central axis of the fan blade 110. The two ends of the rotating shaft 130 in the axial direction of the rotor 120 respectively protrude from the rotor 120 and the fan blade 110 in the axial direction of the rotor 120, that is, the two ends of the rotating shaft 130 respectively protrude from the two ends of the rotor 120 and the fan blade 110 which are away from each other in the axial direction of the rotor 120, so as to provide radial support for the rotor 120 and the fan blade 110 through the rotating shaft 130.

[0041] Referring to Figure 2 As shown, it can be understood that the rotor 120 is annular and is provided with an inner cavity 123, one end of the inner cavity 123 close to the fan blade 110 is closed by the fan blade 110, and the other end of the inner cavity 123 away from the fan blade 110 is provided with an opening which is open. That is, the rotor 120 is substantially cylindrical. At this time, the rotating shaft 130 can be arranged in the inner cavity 123 of the rotor 120 and fixedly connected with the fan blade 110. Therefore, on the one hand, the material cost of the rotor 120 can be reduced, and on the other hand, the weight of the rotor 120 can be reduced, thereby reducing the overall weight of the fan and meeting the lightweight design requirement, which is beneficial to improve the performance of the fan. At the same time, the moment of inertia of the rotor 120 is reduced, which is beneficial to improve the speed of responding to the control signal and improve the control accuracy. In addition, due to the hollow inside of the rotor 120, the contact area between the rotor 120 and the air can be increased, and the air in the outer space of the rotor 120 can flow through the inner cavity 123 of the rotor 120 through the opening, so as to enhance the heat dissipation capacity of the rotor 120, improve the heat dissipation performance, and improve the performance of the fan.

[0042] Referring to Figure 2 As shown, it can be understood that, in order to improve the structural strength of the rotor 120, in the embodiment, the rotating assembly 100 further comprises a support 122. The support 122 is a circular plate structure and is connected to the inner circumferential wall of the inner cavity 123 of the rotor 120, and the support 122 is perpendicular to the rotating axis of the rotor 120. In this way, the support 122 can provide radial support for the rotor 120, reduce the deformation of the rotor 120, thereby enhancing the structural strength of the rotor 120 and improving the rotating stability of the rotor 120. At this time, the rotating shaft 130 can be fixedly connected to the support 122.

[0043] In other embodiments, the rotor 120 can also be a solid body, which has better structural strength.

[0044] Referring to Figure 2As shown, it can be understood that in the embodiment, the support 122 is located approximately at the middle position of the rotor 120 in the axial direction, and the support 122 divides the inner cavity 123 into a first cavity 1231 and a second cavity 1232 arranged in sequence in the axial direction of the rotor 120. The space between the support 122 and the fan blade 110 is defined as the first cavity 1231, and the space on the side of the support 122 away from the fan blade 110 is defined as the second cavity 1232. Obviously, the end of the second cavity 1232 away from the support 122 has an opening and can communicate with the external space of the rotor 120. In order to enable the first cavity 1231 to also communicate with the external space of the rotor 120, the support 122 is provided with at least one through hole 1221, and the through hole 1221 communicates the first cavity 1231 and the second cavity 1232. Specifically, the number of through holes 1221 is multiple, for example, two, three, four or more. The multiple through holes 1221 can be arranged at any position of the support 122 and spaced apart, or the multiple through holes 1221 are arranged equidistantly along the circumference of the rotor 120. In this way, the first cavity 1231 communicates with the external space of the rotor 120 through the through hole 1221 and the second cavity 1232. Therefore, the air in the external space of the rotor 120 can flow through the first cavity 1231 and the second cavity 1232 to meet the heat dissipation requirement of the rotor 120 and improve the heat dissipation performance.

[0045] With reference to Figure 2 As shown, it can be understood that the rotating shaft 130 includes a first shaft segment 131 and a second shaft segment 132, and the first shaft segment 131 and the second shaft segment 132 are arranged spaced apart and coaxially along the axial direction of the rotor 120. Among them, the second shaft segment 132 is connected with the rotor 120 and protrudes from the rotor 120 in the direction away from the fan blade 110, specifically, the second shaft segment 132 is connected with the support 122, and the first shaft segment 131 is connected to the end of the fan blade 110 away from the rotor 120 and protrudes from the fan blade 110 in the direction away from the rotor 120. Therefore, the fan blade 110 and the rotor 120 can be radially supported by the first shaft segment 131 and the second shaft segment 132. In this way, the shaft segment of the rotating shaft 130 located between the rotor 120 and the fan blade 110 can be omitted, the material usage of the rotating shaft 130 is reduced, and the material cost is reduced; at the same time, the bearing for supporting the shaft segment can also be omitted, further reducing the cost. It can be easily understood that the omission of part of the shaft segment of the rotating shaft 130 and the bearing for supporting the shaft segment can also reduce the weight of the whole fan to some extent, meet the requirement of lightweight design, and be beneficial to improving the performance of the fan.

[0046] In some other embodiments, the rotating shaft 130 can also extend from one end of the rotor 120 to the other end of the rotor 120 and the fan blade 110, i.e. the rotating shaft 130 extends through the entire rotor 120 and the fan blade 110, which is beneficial to improve the structural strength of the rotating assembly 100 as a whole. In addition, since the fan blade 110 is directly connected to one end of the rotor 120, the bearing between the fan blade 110 and the rotor 120 can be omitted, which is beneficial to reduce the weight and cost.

[0047] In some other embodiments, the rotating shaft 300 only includes the first shaft segment 131, which is connected to one end of the fan blade 110 away from the rotor 120 and protrudes from the fan blade 110 in a direction away from the rotor 120. Therefore, the fan blade 110 and the rotor 120 can be radially supported by the magnetic force between the stator 200 and the rotor 120 and the first shaft segment 131.

[0048] It can be understood that the fan blade 110, the rotor 120 and the rotating shaft 130 are an integral structure.

[0049] It can be understood that the support 122 is a plastic part and is obtained by an injection molding process. The rotor 120 and the support 122 are an integral structure, and after the rotor 120 and the support 122 are respectively injection molded, the rotor 120 and the support 122 are connected into an integral structure by fusion welding or bonding, which is simple in processing technology and good in structural stability.

[0050] It can be understood that the fan blade 110 and the rotating shaft 130 are plastic parts and are obtained by an injection molding process. Similarly, after the fan blade 110, the first shaft segment 131 and the second shaft segment 132 of the rotating shaft 130 are respectively injection molded, the second shaft segment 132 is fusion welded or bonded to the support 122, one end of the fan blade 110 along the axial direction of the rotor 120 is fusion welded or bonded to one end of the rotor 120, and the first shaft segment 131 is fusion welded or bonded to the other end of the fan blade 110. Thus, the fan blade 110, the rotor 120, the support 122, the first shaft segment 131 and the second shaft segment 132 of the rotating shaft 130 are connected into an integral structure, which is simple in processing technology. That is, when assembling the fan, the fan blade 110, the support 122, the rotor 120 and the rotating shaft 130 are provided as an integral structure. Forming the fan blade 110, the support 122, the rotor 120 and the rotating shaft 130 into an integral structure can omit the process of mounting the fan blade 110 to the rotating shaft 130.

[0051] In some other embodiments, the fan blade 110 and the rotor 120 can be obtained by a secondary injection molding process. For example, in the same mold, the fan blade 110 is first injection molded, and then the rotor 120 and the fan blade 110 are combined by secondary injection molding based on the obtained fan blade 110.

[0052] In some other embodiments, the second shaft segment 132 and the support 122 can be an integral structure, i.e. an integral structure of the second shaft segment 132 and the support 122 is directly obtained by injection molding, without the need of fusion welding or bonding the second shaft segment 132 to the support 122. Similarly, the impeller 110 and the first shaft segment 131 can also be an integral structure, i.e. an integral structure of the impeller 110 and the first shaft segment 131 is directly obtained by injection molding, without the need of fusion welding or bonding the first shaft segment 131 to the impeller 110. Thus, after fusion welding or bonding the integral structure of the second shaft segment 132 and the support 122 to the inner circumferential wall of the inner cavity 123 of the rotor 120, and fusion welding or bonding the integral structure of the first shaft segment 131 and the impeller 110 to the end of the rotor 120 along the axial direction, the impeller 110, the rotor 120, the first shaft segment 131 and the second shaft segment 132 of the rotating shaft 130 are connected into an integral whole, with better structural stability and simpler production process.

[0053] Therefore, the impeller 110, the support 122, the rotor 120 and the rotating shaft 130 are provided as an integral structure, which can increase the connection strength of the impeller 110 and the rotor 120, and the impeller 110 is less likely to deform or shake during rotation, and can still maintain good stability at high speed, which is conducive to reducing vibration and thus reducing noise. Meanwhile, when assembling the fan, the impeller 110 does not need to be installed to the rotating shaft 130 and locked by the locking device 430, which reduces the number of parts and effectively simplifies the assembly process of the fan, with simple assembly process and improved assembly efficiency.

[0054] In addition, the impeller 110 is connected to the end of the rotor 120 along the axial direction, so that the shaft segment between the rotor 120 and the impeller 110 in the rotating shaft 130 and the bearing for supporting the shaft segment are omitted, further reducing the number of parts, and the axial structure of the fan is more compact, effectively saving the axial installation space of the fan, reducing the installation difficulty and improving the installability.

[0055] In some other embodiments, the rotor 120 can also be a magnetic ring obtained by sintering process, the magnetic ring is bonded to one end of the impeller 110, or the one end of the impeller 110 is plastic-coated on the surface of the magnetic ring by injection molding process, and the support 122 is bonded to the magnetic ring. In this way, the rotor 120, the impeller 110 and the rotating shaft 130 can also form an integral structure, effectively simplifying the assembly process of the fan, with simple assembly process and improved assembly efficiency.

[0056] Reference Figure 2As shown, it can be understood that the fan further comprises a first bearing 140 and a second bearing 150. Specifically, the first bearing 140 is mounted on the first shaft segment 131 of the rotating shaft 130 and rotationally cooperates with the first shaft segment 131, that is, the first bearing 140 is mounted on the shaft segment of the rotating shaft 130 protruding from the fan blade 110, the second bearing 150 is mounted on the second shaft segment 132 of the rotating shaft 130 and rotationally cooperates with the second shaft segment 132, that is, the second bearing 150 is mounted on the shaft segment of the rotating shaft 130 protruding from the rotor 120, and the first bearing 140 and the second bearing 150 are coaxially arranged. In this way, the fan blade 110 and the rotor 120 are jointly supported by the first bearing 140 and the second bearing 150, that is, the fan blade 110 and the rotor 120 share a set of bearings, which is beneficial to save the axial installation space of the fan, compact structure, and improve the installability. Moreover, the bearings between the fan blade 110 and the rotor 120 are omitted, the number of parts is reduced, the cost is reduced, the overall weight of the fan is reduced, and the lightweight of the fan is realized.

[0057] It is easy to understand that when the fan is installed, the rotating assembly 100 composed of the fan blade 110, the rotor 120 and the rotating shaft 130 is inserted into the inner hole of the stator 200, the stator 200 is fixedly installed on the bracket of the indoor unit, and the rotating assembly 100 is installed on the bracket of the indoor unit through the first bearing 140 and the second bearing 150 to provide support for the rotating assembly 100. The installation operation is simple and the installability is good.

[0058] Referring to Figure 2 As shown, it can be understood that the stator 200 is provided with an open end at each end in the axial direction of the rotor 120, that is, the stator 200 is provided with no end cover structure at each end in the axial direction of the rotor 120. Therefore, the space occupied by the stator 200 in the axial direction of the rotor 120 can be reduced, which is beneficial to reduce the volume of the fan and save the axial installation space, improve the installability. Moreover, the weight of the fan can be reduced, and the lightweight of the fan is realized.

[0059] Referring to Figure 3 As shown, it can be understood that the inner circumferential wall of the stator 200 and the outer circumferential wall of the rotor 120 are arranged in the radial direction of the rotor 120, and the first heat dissipation channel 210 is defined between the inner circumferential wall of the stator 200 and the outer circumferential wall of the rotor 120, that is, the first heat dissipation channel 210 is the air gap between the stator 200 and the rotor 120. At the same time, the first heat dissipation channel 210 extends to the open ends of the stator 200 at both ends in the axial direction of the rotor 120, so that the first heat dissipation channel 210 is in communication with the external space of the stator 200. Therefore, when the rotor 120 rotates, the air in the external space of the stator 200 can flow through the first heat dissipation channel 210 to enhance the heat dissipation effect of the stator 200 and the rotor 120, and improve the heat dissipation performance. For example, the air carrying heat in the first heat dissipation channel 210 flows out to the external space of the stator 200 in a direction away from the fan blade 110 to achieve heat dissipation.

[0060] Referring to Figure 3 As shown in the figure, it can be understood that the maximum outer diameter of the fan blade 110 is greater than the maximum outer diameter of the rotor 120 in the radial direction of the rotor 120, and the maximum outer diameter of the fan blade 110 is also greater than the maximum outer diameter of the stator 200. The fan blade 110 and the stator 200 are arranged in the axial direction of the rotor 120 and define a second heat dissipation channel 220. On the one hand, the stator assembly 310 avoids affecting the rotation of the fan blade 110, and on the other hand, one end of the second heat dissipation channel 220 close to the rotor 120 is in communication with the first heat dissipation channel 210, and the other end of the second heat dissipation channel 220 away from the rotor 120 is in communication with the external space of the stator 200. Therefore, the air carrying heat in the first heat dissipation channel 210 can also flow out to the external space of the stator 200 through the second heat dissipation channel 220, so as to further enhance the heat dissipation effect of the stator 200 and the rotor 120 and improve the heat dissipation effect.

[0061] Referring to Figure 2 As shown in the figure, it can be understood that the maximum length of the rotor 120 is greater than the maximum length of the stator 200 in the axial direction of the rotor 120, and the two ends of the rotor 120 protrude from the two end faces of the stator 200. That is, the rotor 120 covers the stator 200 in the axial direction, which can enhance the magnetic field of the rotor 120 on the one hand, and fully exert the magnetic field effect of the stator 200 on the other hand, thereby improving the efficiency of the fan.

[0062] The air conditioner of the second aspect embodiment of the utility model, including the fan of the utility model first aspect embodiment, the air conditioner can be split type air conditioner, integral type air conditioner, central air conditioning and the like, this place does not repeat.

[0063] The air conditioner adopts the fan of all the technical solutions of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments.

[0064] The above-mentioned embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A fan characterised in that, The fan comprises: a rotating assembly comprising a fan blade, a rotor and a rotating shaft, the fan blade and the rotor being an integral structure, and the fan blade being located at an end of the rotor along an axial direction, the rotating shaft comprising a first shaft section connected to an end of the fan blade away from the rotor; a stator arranged annularly around an outer periphery of the rotor.

2. The fan of claim 1, wherein: The rotor is annular and provided with an inner cavity, an end of the inner cavity away from the fan blade being provided with an opening.

3. The fan of claim 2, wherein: The rotating assembly further comprises a support connected to an inner peripheral wall of the inner cavity and connected to the rotating shaft, the support, the fan blade and the rotor being an integral structure.

4. The fan of claim 3, wherein: The support divides the inner cavity into a first cavity and a second cavity arranged sequentially along the axial direction, the support being provided with at least one through hole communicating the first cavity and the second cavity.

5. The fan of claim 3, wherein: The rotating shaft further comprises a second shaft section coaxially arranged with the first shaft section, the second shaft section being connected to the support.

6. The fan of claim 5, wherein: The fan further comprises a first bearing and a second bearing, the first bearing being mounted to the first shaft section and rotationally fitted with the first shaft section, and the second bearing being mounted to the second shaft section and rotationally fitted with the second shaft section.

7. The fan of claim 1 or 5, wherein: The rotating shaft, the fan blade and the rotor are an integral structure.

8. The fan of claim 1, wherein: The stator is provided with openings at two ends thereof along the axial direction, an inner peripheral wall of the stator and an outer peripheral wall of the rotor are spaced apart in a radial direction of the rotor and define a first heat dissipation channel, two ends of the first heat dissipation channel extending to the openings at the two ends of the stator respectively.

9. The fan of claim 8, wherein: In the radial direction, a maximum outer diameter of the fan blade is greater than a maximum outer diameter of the rotor, the fan blade and the stator are spaced apart in the axial direction and define a second heat dissipation channel, the second heat dissipation channel being communicated with the first heat dissipation channel.

10. The fan of claim 1, wherein: In the axial direction, a maximum length of the rotor is greater than a maximum length of the stator, and two ends of the rotor are respectively protruded from two end faces of the stator.

11. The fan of claim 1, wherein: The rotor is an injection molded magnet.

12. An air conditioner characterized by The fan comprises any one of claims 1 to 11. The fan comprises any one of claims 1 to 11.

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