Fans and cleaning equipment

Abstract

The present invention discloses a fan and cleaning equipment, which relates to the technical field of fans, wherein the fan includes a hood, an impeller, a diffuser, a stator assembly and a rotor assembly; the diffuser is connected to the hood, the diffuser includes an inner wall, an outer wall and a diffuser blade arranged between the inner wall and the outer wall, a diffuser channel is formed between the inner wall and the outer wall, and an accommodating cavity is formed on the inner wall; at least part of the stator assembly is located in the accommodating cavity, and the stator assembly is connected to the diffuser by fasteners; the rotor assembly includes a rotor and a rotating shaft, one end of the rotating shaft is connected to the impeller, the rotor is mounted on the rotating shaft, and cooperates with the stator assembly to drive the impeller to rotate. The diffuser of the present invention wraps at least part of the stator assembly, which can reduce the axial size of the fan, so that the fan has a high degree of integration; the stator assembly is connected to the diffuser by fasteners, so that the connection between the stator assembly and the diffuser is more stable, thereby making the operation of the fan more stable and more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to a fan and a cleaning device. Background Art

[0002] With the development and rapid growth of demand for vacuum cleaners and other related household appliances, high-speed fans, as the core power components of products, their reliability and other related indicators are the key to the quality of vacuum cleaners and other products. In related technologies, the small size and low weight requirements of high-speed fans will lead to reduced reliability of high-speed fans, so it is also necessary to optimize the product structure to solve the above problems. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a fan that can meet the needs of small size and has high reliability.

[0004] The present invention also provides a cleaning device having the above-mentioned blower.

[0005] According to an embodiment of the first aspect of the present invention, the fan comprises: a fan cover, an impeller is arranged inside, an air inlet channel is formed between the impeller and the fan cover; a diffuser, connected to the fan cover and located at the air outlet end of the air inlet channel, the diffuser comprises an inner wall, an outer wall and diffuser blades arranged between the inner wall and the outer wall, a diffuser channel connected to the air inlet channel is formed between the inner wall and the outer wall, and an accommodating cavity is formed on the inner wall; a stator assembly is at least partially located in the accommodating cavity, the stator assembly is connected to the diffuser by fasteners; a rotor assembly comprises a rotor and a rotating shaft, one end of the rotating shaft is connected to the impeller, the rotor is mounted on the rotating shaft, and cooperates with the stator assembly to drive the impeller to rotate.

[0006] The fan according to the embodiment of the present invention has at least the following beneficial effects:

[0007] By arranging the diffuser at the air outlet end of the air inlet channel formed by the wind cover and the impeller, a diffusion channel is formed between the inner wall and the outer wall of the diffuser, and the rotor assembly and the stator assembly cooperate to drive the impeller to rotate to form an airflow, and the airflow enters the diffusion channel through the air inlet channel, thereby increasing the efficiency of the fan; the stator assembly is located in the accommodating cavity formed by the diffuser, and the diffuser wraps at least a part of the stator assembly, which can reduce the axial size of the fan and make the fan highly integrated; the stator assembly and the diffuser are connected by fasteners, so that the connection between the stator assembly and the diffuser is more stable, and the stability of the coordination between the stator assembly and the rotor assembly is improved, thereby making the operation of the fan more stable and more reliable.

[0008] According to some embodiments of the present invention, the diffuser further includes a mounting hub disposed in the accommodating cavity, the mounting hub is provided with a first positioning hole, the stator assembly is provided with a mounting hole, and the fastener is passed through the mounting hole and the first positioning hole to fix the stator assembly and the diffuser.

[0009] According to some embodiments of the present invention, the diffuser includes a first diffuser and a second diffuser, the first diffuser is connected to the wind cover, the first diffuser is provided with the mounting hub, the mounting hub is provided with a first positioning ear, the first positioning hole is provided at the first positioning ear, the second diffuser is connected to an end of the first diffuser away from the wind cover, a second positioning ear is provided inside the second diffuser, the second positioning ear is paired with the first positioning ear along the axial direction of the rotating shaft, and a second positioning hole paired with the first positioning hole is provided, and the fastener is passed through the mounting hole, the second positioning hole and the first positioning hole.

[0010] According to some embodiments of the present invention, the diffuser also includes a third diffuser, which is connected to one end of the second diffuser away from the first diffuser, and a third positioning ear is provided inside the third diffuser, and the third positioning ear is paired with the second positioning ear along the axial direction of the rotating shaft, and a third positioning hole paired with the second positioning hole is provided, and the fastener is passed through the mounting hole, the third positioning hole, the second positioning hole and the first positioning hole.

[0011] According to some embodiments of the present invention, the mounting ear, the third positioning ear, the second positioning ear and the first positioning ear are sequentially connected along the axial direction of the rotating shaft and abut against each other for positioning.

[0012] According to some embodiments of the present invention, the mounting hub is provided with a bearing mounting seat and a stator mounting seat, the rotating shaft is mounted on the bearing mounting seat via at least one bearing, and the stator assembly is mounted on the stator mounting seat.

[0013] According to some embodiments of the present invention, the stator mounting seat includes a plurality of support structures arranged at intervals along the circumference of the diffuser, one end of the plurality of support structures is fixedly connected to the mounting hub, and the other end is formed with a circumferential positioning portion and an axial positioning portion, and the stator assembly is positioned and matched with the stator mounting seat through the circumferential positioning portion and the axial positioning portion.

[0014] According to some embodiments of the present invention, the stator assembly includes an insulating frame, an iron core and a winding, the iron core is wrapped around the outer side of the insulating frame, and the winding is wound around the inner side of the insulating frame; the insulating frame is provided with a positioning groove at one end along the axial direction of the rotating shaft away from the mounting hole, and the positioning groove is positioned and matched with the axial positioning portion.

[0015] According to some embodiments of the present invention, a plurality of the positioning grooves are provided at intervals along the circumference of the insulating frame, and cooperate with the plurality of the axial positioning portions in a one-to-one correspondence.

[0016] According to some embodiments of the present invention, at least two first positioning ears are arranged at intervals along the circumferential direction of the inner wall of the first diffuser.

[0017] According to some embodiments of the present invention, the first diffuser includes a first inner wall, a first outer wall and a first diffuser blade, the second diffuser includes a second inner wall, a second outer wall and a second diffuser blade, the third diffuser includes a third inner wall, a third outer wall and a third diffuser blade, and the first inner wall, the second inner wall and the third inner wall are sealed and connected.

[0018] According to some embodiments of the present invention, the first outer wall is provided with a first positioning edge, one end of the second outer wall is provided with a second positioning edge that cooperates with the first positioning edge, the other end of the second outer wall is provided with a third positioning edge, and the third outer wall is provided with a fourth positioning edge that cooperates with the third positioning edge.

[0019] According to some embodiments of the present invention, the fan further includes an electric control board connected to one end of the diffuser away from the wind cover, the electric control board is provided with a plug-in terminal, and the stator assembly is provided with a wiring terminal that cooperates with the plug-in terminal.

[0020] According to some embodiments of the present invention, the fan further comprises a connecting arm, wherein the connecting arm is connected to the diffuser, and the connecting arm is provided with a mounting groove for positioning and cooperating with the electric control board.

[0021] According to some embodiments of the present invention, a magnetic ring is provided at one end of the rotating shaft away from the impeller, and the electric control board is provided with a speed measuring module cooperating with the magnetic ring.

[0022] According to some embodiments of the present invention, the wind hood includes a hood body and a mounting wall, one end of the hood body is connected to the mounting wall, a boss and a slot are provided between the mounting wall and the outer wall, one of the boss and the slot is provided on the mounting wall, and the other is provided on the outer wall, and the slot is configured to accommodate the boss.

[0023] According to some embodiments of the present invention, reinforcing ribs are provided between the cover body and the mounting wall, and a plurality of the reinforcing ribs are provided and are spaced apart along the circumference of the mounting wall.

[0024] The cleaning device according to the second embodiment of the present invention comprises the fan described in the above embodiment.

[0025] The cleaning device according to the embodiment of the present invention has at least the following beneficial effects:

[0026] The fan adopts the first aspect of the embodiment, and the fan forms a diffusion channel between the inner wall and the outer wall of the diffuser by arranging the diffuser at the air outlet end of the air inlet channel formed by the wind cover and the impeller. The rotor assembly and the stator assembly cooperate to drive the impeller to rotate to form an airflow, and the airflow enters the diffusion channel through the air inlet channel, thereby increasing the efficiency of the fan; the stator assembly is located in the accommodating cavity formed by the diffuser, and the diffuser wraps at least part of the stator assembly, which can reduce the axial size of the fan and make the fan highly integrated; the stator assembly and the diffuser are connected by fasteners, so that the connection between the stator assembly and the diffuser is more stable, and the stability of the cooperation between the stator assembly and the rotor assembly is improved, so that the operation of the fan is more stable and the reliability is higher, thereby improving the reliability of the cleaning equipment and extending the service life of the cleaning equipment.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 A schematic structural diagram of a fan according to an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A cross-sectional view of

[0031] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0032] Figure 4 A partial exploded view of a fan according to an embodiment of the present invention;

[0033] Figure 5 An exploded view of a stator assembly and a diffuser according to an embodiment of the present invention;

[0034] Figure 6 An exploded view of a stator assembly and a diffuser according to another embodiment of the present invention;

[0035] Figure 7 An enlarged view of a first diffuser at one angle according to an embodiment of the present invention;

[0036] Figure 8 An enlarged view of the first diffuser of an embodiment of the present invention from another angle;

[0037] Fig. 9 An enlarged view of a stator assembly at one angle according to an embodiment of the present invention;

[0038] Fig.10 An enlarged view of a stator assembly of an embodiment of the present invention from another angle;

[0039] Fig.11 for Fig.10 Exploded diagram of

[0040] Fig.12 is an enlarged view of a third diffuser according to an embodiment of the present invention;

[0041] Fig.13 An exploded view of a stator assembly, an electric control board and a third diffuser according to an embodiment of the present invention;

[0042] Fig.14 for Figure 1 A magnified view of one angle of the stroke mask;

[0043] Fig.15 for Figure 1 A zoomed-in view of the stroke shield from another angle.

[0044] Figure Number:

[0045] Fan 1000;

[0046] Wind cover 100; air inlet channel 110; cover body 120; air inlet 121; air outlet 122; mounting wall 130; notch 131; reinforcing rib 140;

[0047] Impeller 200;

[0048] Diffuser 300; diffuser channel 310; inner wall 320; outer wall 330; diffuser blade 340; accommodating chamber 350;

[0049] first diffuser 360; first inner wall 361; first outer wall 362; first positioning edge 3621; boss 3622; first diffuser blade 363; first diffuser channel 364; mounting hub 365; first positioning hole 3651; guide surface 3652; first positioning ear 366; bearing mounting seat 367; circular hole 3671; stator mounting seat 368; support structure 369; circumferential positioning portion 3691; axial positioning portion 3692;

[0050] second diffuser 370; second inner wall 371; second outer wall 372; second positioning edge 3721; third positioning edge 3722; second diffuser blade 373; second diffuser channel 374; second positioning ear 375; second positioning hole 3751;

[0051] A third diffuser 380; a third inner wall 381; a third outer wall 382; a fourth positioning edge 3821; a third diffuser blade 383; a third diffuser channel 384; a third positioning ear 385; a third positioning hole 3851; a connecting arm 386; and a mounting groove 387;

[0052] Rotor assembly 400; rotating shaft 410; rotor 420; bearing 430; balancing block 440; magnetic ring 450;

[0053] stator assembly 500; mounting ear 510; mounting hole 511; groove 512; iron core 520; winding 530; insulation frame 540; first insulation frame 541; second insulation frame 542; positioning groove 550; connection terminal 560;

[0054] Bolt 600;

[0055] Electric control board 700; plug-in terminal 710. DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0057] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 on the present invention.

[0058] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0059] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0060] Reference Figure 1 As shown, Figure 1Schematic diagram of the structure of a fan 1000 according to an embodiment of the present invention. The fan 1000 according to an embodiment of the present invention can be used in cleaning equipment such as vacuum cleaners, especially portable equipment such as handheld vacuum cleaners or sweeping robots that require a smaller volume. The fan 1000 according to the embodiment of the present invention has a very high rotation speed, generally reaching between 80,000 rpm and 150,000 rpm. When the fan 1000 runs at such a high rotation speed, the operating stability of its rotor assembly 400 and stator assembly 500 is the key to the reliability and life of the fan 1000.

[0061] Reference Figure 1 and Figure 2 As shown, Figure 2 1 is a cross-sectional view of a fan 1000 according to an embodiment of the present invention. The fan 1000 according to an embodiment of the present invention comprises a fan housing 100, an impeller 200, a diffuser 300, a stator assembly 500 and a rotor assembly 400. The impeller 200 is installed inside the fan housing 100, and an air inlet channel 110 is formed between the impeller 200 and the fan housing 100. The impeller 200 is drivingly connected to the rotor assembly 400, and the rotor assembly 400 cooperates with the stator assembly 500 to drive the impeller 200 to rotate.

[0062] It is understandable that the impeller 200 rotates to form an airflow, and after the airflow passes through the air inlet channel 110, the kinetic energy of the airflow increases. The diffuser 300 is installed at the rear end of the impeller 200 along the airflow direction. The diffuser 300 is provided with a pressure diffuser channel 310, which is connected to the air inlet channel 110. The pressure diffuser channel 310 is located at the air outlet end of the air inlet channel 110. After the airflow enters the pressure diffuser channel 310, the pressure diffuser channel 310 converts the kinetic energy of the airflow into air pressure energy, thereby increasing the pressure of the airflow, so that the airflow flowing out of the air outlet end of the diffuser 300 is blown farther, thereby increasing the efficiency of the fan 1000 and making the wind force of the fan 1000 stronger.

[0063] Continue to refer to Figure 2As shown, the diffuser 300 of the embodiment of the present invention includes an inner wall 320, an outer wall 330 and a diffuser blade 340, and the diffuser blade 340 is arranged in the interval space between the inner wall 320 and the outer wall 330. It should be noted that the diffuser blade 340 is a stationary blade, that is, the diffuser blade 340 is fixed to the inner wall 320, or fixed to the outer wall 330, and can also be fixed to the inner wall 320 and the outer wall 330 at the same time, which is not specifically limited here. The diffuser channel 310 is enclosed between the inner wall 320 and the outer wall 330, and the diffuser channel 310 is connected with the air inlet channel 110, so that the airflow flows smoothly from the air inlet channel 110 into the diffuser channel 310, and the airflow is pressurized by the action of the diffuser blade 340. It can be understood that the diffuser blades 340 can be arranged at intervals along the circumference of the diffuser 300, and the diffuser blades 340 can also be arranged in multiple groups along the axial direction of the diffuser 300, each group of diffuser blades 340 is arranged at intervals along the axial direction of the diffuser 300, and the parameters of each group of diffuser blades 340 can be set to be the same or different, and the specific form is not specifically limited here.

[0064] Reference Figure 2 and Figure 3 As shown, Figure 3 It is a partial cross-sectional enlarged view of a fan 1000 according to an embodiment of the present invention. The inner wall 320 of the diffuser 300 encloses a receiving cavity 350, the stator assembly 500 is located in the receiving cavity 350, and the diffuser 300 is wrapped in the stator assembly 500. Part of the structure of the stator assembly 500 is located in the receiving cavity 350, or the entire structure of the stator assembly 500 is located in the receiving cavity 350. The rotor assembly 400 is inserted into the receiving cavity 350. Therefore, the stator assembly 500 and the rotor assembly 400 are both built into the diffuser 300, so that the axial dimension of the fan 1000 can be reduced. The overall integration of the fan 1000 is high, and the external dimensions of the fan 1000 are reduced to the greatest extent, thereby meeting the requirements of small size and low weight of the fan 1000.

[0065] Reference Figure 4 As shown, Figure 4It is a partial exploded view of a fan 1000 according to an embodiment of the present invention. The rotor assembly 400 according to the embodiment of the present invention includes a rotating shaft 410, a rotor 420, a balancing block 440 and a bearing 430. The rotor 420 is a permanent magnet, and the rotor 420 is mounted on the rotating shaft 410. Correspondingly, the stator assembly 500 includes an iron core 520 and a winding 530, and the iron core 520 and the winding 530 are arranged around the outer periphery of the rotating shaft 410. The rotor 420 corresponds to the axial position of the iron core 520 and the winding 530 along the rotating shaft 410, so that the rotor 420 and the stator assembly 500 can rotate relative to each other, thereby driving the rotating shaft 410 to rotate, and one end of the rotating shaft 410 is connected to the impeller 200, thereby driving the impeller 200 to rotate. The balancing block 440 is mounted on the rotating shaft 410. The balancing block 440 and the rotor 420 are distributed along the axial direction of the rotating shaft 410. One or more balancing blocks 440 can be provided. The balancing block 440 is set at the corresponding position of the rotating shaft 410 according to the parameter requirements of different fan 1000 products, so that the force on the rotating shaft 410 is more balanced and the rotation is more stable, thereby further improving the stability of the rotation of the impeller 200.

[0066] Reference Figure 2 and Figure 4 As shown, the diffuser 300 of the embodiment of the present invention is provided with a mounting hub 365, and the mounting hub 365 is located in the accommodating cavity 350. The mounting hub 365 can be fixedly connected to any position of the inner wall 320 along the axial direction of the diffuser 300. It should be noted that in the embodiment of the present invention, "fixed connection" can be interpreted as connection in a manner that cannot be relatively displaced. The mounting hub 365 is provided with a bearing mounting seat 367, and the bearing mounting seat 367 is provided with a circular hole 3671. The bearing 430 is sleeved on the rotating shaft 410, and the bearing 430 and the wall surface of the circular hole 3671 are interference fit, so that the rotating shaft 410 is installed on the bearing mounting seat 367 through the bearing 430, so that the rotating shaft 410 and the mounting hub 365 are stably connected, and the rotating shaft 410 can achieve stable rotation relative to the diffuser 300. It is understandable that there may be a plurality of mounting hubs 365, each of which is provided with a bearing mounting seat 367, and the rotating shaft 410 is respectively connected to the corresponding bearing mounting seats 367 through a plurality of bearings 430, thereby achieving a stable connection with the diffuser 300. In addition, the bearing mounting seat 367 may also be provided as a structure capable of accommodating a plurality of bearings 430, and the rotating shaft 410 is mounted on the bearing mounting seat 367 through a plurality of bearings 430, thereby achieving a stable connection with the diffuser 300.

[0067] It should be noted that, according to the specific structural arrangement of the fan 1000 product, the rotating shaft 410 can also be installed at the wind cover 100 or other positions of the fan 1000, which is not specifically limited here.

[0068] Continue to refer to Figure 2 and Figure 3As shown, in the fan 1000 of the embodiment of the present invention, the stator assembly 500 and the diffuser 300 are connected by bolts 600, and the bolts 600 are respectively inserted into the stator assembly 500 and the diffuser 300 to achieve fixed connection. For example, connecting ears are formed between the stator assembly 500 and the diffuser 300. The bolts 600 are sequentially inserted into the connecting ears and fixed, so that the stator assembly 500 and the diffuser 300 are stably connected, and the rotor assembly 400 and the diffuser 300 are stably connected through the bearing 430, thereby improving the stability of the stator assembly 500 and the rotor assembly 400, so that the operation of the fan 1000 is more stable and reliable. It can be understood that the bolts 600 can also be replaced by fasteners such as screws, rivets, and pins. The structure and principle of the bolts 600 can refer to the embodiment of the bolt 600. In order to avoid redundancy, it will not be repeated here.

[0069] Reference Figure 1 As shown, it can be understood that the larger the length dimension (i.e., the length along the axial direction) of the diffuser 300, the higher the efficiency of the fan 1000, and the stronger the wind force of the fan 1000; however, due to the limitation of the overall size of the fan 1000, the length of the diffuser 300 needs to be designed according to the actual product, so as to maximize the increase in length. In addition, the longer the length of the diffuser 300, the greater the production difficulty. Therefore, the diffuser 300 of the embodiment of the present invention can also be a multi-stage diffuser 300, and the multi-stage diffuser 300 is composed of at least two diffusers 300 manufactured separately and then assembled and combined, thereby effectively reducing the processing difficulty and improving the processing quality. Moreover, the number, thickness, inlet angle, outlet angle and other parameters of the diffuser blades 340 between the multiple diffusers 300 can be respectively designed through simulation to obtain a better combination form, thereby improving the performance of the diffuser 300. Therefore, by manufacturing and assembling the multi-stage diffuser 300 separately, the processing difficulty of the combination structure of different diffuser blades 340 can be reduced. For example, when the diffuser 300 is injection molded, a solution in which the multi-stage diffusers 300 are manufactured separately can ensure the convenience of demolding between different diffuser blades 340, improve the processing accuracy and yield rate, and enhance the performance of the fan 1000.

[0070] Reference Figure 5 As shown, Figure 5 1 is an exploded view of a stator assembly 500 and a diffuser 300 of an embodiment of the present invention. The diffuser 300 of the embodiment of the present invention is configured as a two-stage diffuser 300. The diffuser 300 includes a first diffuser 360 and a second diffuser 370. One end of the first diffuser 360 is connected to the wind cover 100, and the other end of the first diffuser 360 is connected to the second diffuser 370. The first diffuser 360 and the second diffuser 370 can be stably connected by bonding, clamping, etc.

[0071] The first diffuser 360 includes a first inner wall 361, a first outer wall 362, and a first diffuser blade 363. The first diffuser blade 363 is disposed between the first inner wall 361 and the first outer wall 362, and a first diffuser passage 364 is formed between the first inner wall 361 and the first outer wall 362. The first diffuser blade 363 may be fixedly connected to the first inner wall 361, or fixedly connected to the first outer wall 362, or fixedly connected to both the first inner wall 361 and the first outer wall 362. The second diffuser 370 includes a second inner wall 371, a second outer wall 372, and a second diffuser blade 373. The second diffuser blade 373 is disposed between the second inner wall 371 and the second outer wall 372, and a second diffuser passage 374 is formed between the second inner wall 371 and the second outer wall 372. The second diffuser blade 373 may be fixedly connected to the second inner wall 371, or fixedly connected to the second outer wall 372, or fixedly connected to both the second inner wall 371 and the second outer wall 372. In the fan 1000 of the embodiment of the present invention, the airflow enters the first diffuser channel 364 and the second diffuser channel 374 in sequence from the air outlet end of the air inlet channel 110, and the first diffuser blades 363 and the second diffuser blades 373 pressurize the airflow, thereby improving the efficiency of the fan 1000.

[0072] Continue to refer to Figure 4 and Figure 5 As shown, it can be understood that the mounting hub 365 is provided on the first diffuser 360, and the mounting hub 365 is fixedly connected to the first inner wall 361. The mounting hub 365 is provided with three first positioning holes 3651, and the three first positioning holes 3651 are spaced and evenly arranged along the circumference of the first inner wall 361, and the three first positioning holes 3651 are blind holes. The stator assembly 500 is provided with a mounting ear 510, and the mounting ear 510 is provided with a mounting hole 511, and the mounting hole 511 is provided with three and is arranged one-to-one with the three first positioning holes 3651. The mounting hub 365 and the stator assembly 500 are fixed by three bolts 600, and each bolt 600 is respectively passed through the corresponding mounting hole 511 and the first positioning hole 3651, and is tightened to the first positioning hole 3651, so that the diffuser 300 and the stator assembly 500 are fixed. In addition, the first positioning hole 3651 can also be provided with an internal thread matching the bolt 600. As another embodiment of the present invention, the first positioning hole 3651 can also be replaced by a through hole, and each bolt 600 is respectively passed through the corresponding mounting hole 511 and the first positioning hole 3651, and is fixed by connecting to a nut matching the bolt 600 at one end of the first positioning hole 3651 away from the mounting hole 511.

[0073] It can be understood that the combination structure of the first positioning hole 3651, the mounting hole 511 and the bolt 600 can also be provided with two groups, four groups or more groups. The specific number needs to be determined according to parameters such as the weight of the stator assembly 500 and the inner diameter of the accommodating cavity 350 in different products, and is no longer specifically limited here.

[0074] It can be understood that, as another embodiment of the present invention, the mounting hub 365 can also be installed on the second diffuser 370, that is, the mounting hub 365 is fixedly connected to the second inner wall 371. The structure and principle of this embodiment are similar to the embodiment in which the mounting hub 365 is installed on the first diffuser 360, and can be appropriately referred to for understanding. In order to avoid redundancy, it will not be repeated here.

[0075] Continue to refer to Figure 5 As shown, the first diffuser 360 of the embodiment of the present invention includes a first positioning ear 366, which is disposed on the mounting hub 365 or on the first inner wall 361. The first positioning ear 366 is a columnar structure extending along the axial direction of the diffuser 300. There are three first positioning ears 366, and the three first positioning ears 366 are respectively provided with a first positioning hole 3651, which can be a blind hole or a through hole.

[0076] The second diffuser 370 includes three second positioning ears 375 , which are evenly distributed along the circumference of the second inner wall 371 on the side of the second inner wall 371 facing the accommodating cavity 350 , and the second positioning ears 375 are provided with second positioning holes 3751 , which are through holes.

[0077] The three second positioning ears 375 and the three first positioning ears 366 are matched along the axial direction of the rotating shaft 410, so that the mounting hole 511, the second positioning hole 3751 and the first positioning hole 3651 are matched. The three bolts 600 are sequentially passed through the mounting hole 511 and the second positioning hole 3751, and fixed to the first positioning hole 3651, thereby being fixed to the first diffuser 360.

[0078] The bolts 600 connect the stator assembly 500, the first diffuser 360, and the second diffuser 370 into a stable structure, thereby limiting the axial freedom of the first diffuser 360 and the second diffuser 370, and effectively preventing the first diffuser 360 and the second diffuser 370 from axial movement. Furthermore, the three bolts 600 are respectively inserted into the first positioning ear 366 and the second positioning ear 375, so that the circumferential freedom of the first diffuser 360 and the second diffuser 370 can be limited, and the mutual rotation between the first diffuser 360 and the second diffuser 370 can be effectively prevented.

[0079] It is understandable that the combination structure of the second positioning hole 3751, the first positioning hole 3651, the mounting hole 511 and the bolt 600 can also be provided with two groups, four groups or more groups, which is not specifically limited here.

[0080] Reference Figure 6 As shown, Figure 6FIG. 1 is an exploded view of a stator assembly 500 and a diffuser 300 according to another embodiment of the present invention. The diffuser 300 according to the embodiment of the present invention is configured as a three-stage diffuser 300. The diffuser 300 includes a first diffuser 360, a second diffuser 370, and a third diffuser 380. The structure of the first diffuser 360 and the structure of the second diffuser 370 are similar to those of FIG. Figure 5 The third diffuser 380 is connected to an end of the second diffuser 370 away from the first diffuser 360. The third diffuser 380 includes a third inner wall 381, a third outer wall 382 and a third diffuser blade 383. The third diffuser blade 383 is disposed between the third inner wall 381 and the third outer wall 382. A third diffuser channel 384 is formed between the third inner wall 381 and the third outer wall 382. The third diffuser blade 383 can be fixedly connected to the third inner wall 381, or fixedly connected to the third outer wall 382, ​​or fixedly connected to both the third inner wall 381 and the third outer wall 382. In the fan 1000 of the embodiment of the present invention, the airflow enters the diffuser channel 310 formed by the first diffuser channel 364, the second diffuser channel 374 and the third diffuser channel 384 in sequence from the air outlet end of the air inlet channel 110, and the first diffuser blade 363, the second diffuser blade 373 and the third diffuser blade 383 pressurize the airflow, thereby improving the efficiency of the fan 1000.

[0081] The third diffuser 380 of the embodiment of the present invention includes a third positioning ear 385. There are three third positioning ears 385. The three third positioning ears 385 are evenly distributed along the circumference of the third inner wall 381 on the side of the third inner wall 381 facing the accommodating cavity 350. The third positioning ear 385 is provided with a third positioning hole 3851, and the third positioning hole 3851 is a through hole.

[0082] The three third positioning ears 385, the three second positioning ears 375 and the three first positioning ears 366 are matched along the axial direction of the rotating shaft 410, so that the mounting hole 511, the third positioning hole 3851, the second positioning hole 3751 and the first positioning hole 3651 are matched. The three bolts 600 are sequentially passed through the mounting hole 511, the third positioning hole 3851 and the second positioning hole 3751, and fixed to the first positioning hole 3651, thereby being fixed to the first diffuser 360.

[0083] The bolts 600 connect the stator assembly 500, the first diffuser 360, the second diffuser 370 and the third diffuser 380 into a stable structure, thereby limiting the axial freedom of the first diffuser 360, the second diffuser 370 and the third diffuser 380, and effectively preventing the first diffuser 360, the second diffuser 370 and the third diffuser 380 from axial movement. Moreover, the three bolts 600 are respectively inserted into the first positioning ear 366, the second positioning ear 375 and the third positioning ear 385, so that the circumferential freedom of the first diffuser 360, the second diffuser 370 and the third diffuser 380 can be limited, and the mutual rotation of the first diffuser 360, the second diffuser 370 and the third diffuser 380 can be effectively prevented.

[0084] Reference Figure 2 and Figure 3 As shown, it can be understood that the mounting ear 510, the third positioning ear 385, the second positioning ear 375 and the first positioning ear 366 are sequentially connected along the axial direction of the rotating shaft 410. Moreover, the mounting ear 510 and the third positioning ear 385 abut against each other, the third positioning ear 385 and the second positioning ear 375 abut against each other, and the second positioning ear 375 and the first positioning ear 366 abut against each other, so that the mounting ear 510, the third positioning ear 385, the second positioning ear 375 and the first positioning ear 366 abut against each other and position, thereby improving the connection stability of the stator assembly 500, the third diffuser 380, the second diffuser 370 and the first diffuser 360, and improving the overall stability of the diffuser 300. It is understandable that the third positioning ear 385, the second positioning ear 375 and the first positioning ear 366 may be provided with corresponding anti-rotation structures, such as a matching structure of a slot and a column, so as to further prevent the first diffuser 360, the second diffuser 370 and the third diffuser 380 from rotating relative to each other.

[0085] Reference Figure 3 and Figure 6 As shown, it can be understood that, through the fixed connection between the bolt 600 and the first positioning ear 366, the second positioning ear 375 and the third positioning ear 385, the first inner wall 361, the second inner wall 371 and the third inner wall 381 are sealed and connected, so that the inner wall 320 of the diffuser 300 forms a sealing structure, which can seal and isolate the diffuser channel 310 and the accommodating chamber 350, avoid mutual air flow between the diffuser channel 310 and the accommodating chamber 350, improve the sealing performance of the diffuser channel 310, and ensure the diffusion effect of the diffuser 300 on the airflow.

[0086] Reference Figure 5As shown, it can be understood that the first outer wall 362 is provided with a first positioning edge 3621, and one end of the second outer wall 372 is provided with a second positioning edge 3721 that is positioned and matched with the first positioning edge 3621. The first positioning edge 3621 is formed by the thickness of the inner cut-away portion of the first outer wall 362, and the second positioning edge 3721 is formed by the thickness of the outer cut-away portion of the second outer wall 372 toward one end of the first outer wall 362. The first positioning edge 3621 cooperates with the second positioning edge 3721, thereby limiting the relative movement of the first diffuser 360 and the second diffuser 370 along the axial direction, so that a stable connection is achieved between the first diffuser 360 and the second diffuser 370. The wall thickness formed after the first positioning edge 3621 and the second positioning edge 3721 are installed and matched is the same as the first outer wall 362 and the second outer wall 372, thereby reducing the influence of the connection on the airflow of the pressure diffuser channel 310; and the matching structure of the first positioning edge 3621 and the second positioning edge 3721 can improve the sealing effect of the outer wall 330 and prevent the pressure diffuser channel 310 from leaking. It is understandable that the connection between the first positioning edge 3621 and the second positioning edge 3721 can also be provided with an adhesive such as glue to achieve a better sealing effect. As another embodiment, the structural form of the first positioning edge 3621 and the second positioning edge 3721 can be interchangeable, that is, the first positioning edge 3621 is formed by the thickness of the outer cut-out portion of the first outer wall 362, and the second positioning edge 3721 is formed by the thickness of the inner cut-out portion of the second outer wall 372.

[0087] Reference Figure 6As shown, the other end of the second outer wall 372 is provided with a third positioning edge 3722, and the third outer wall 382 is provided with a fourth positioning edge 3821 that cooperates with the third positioning edge 3722. The third positioning edge 3722 is formed by the thickness of the inner cut-away portion of the second outer wall 372 toward one end of the third outer wall 382, ​​and the fourth positioning edge 3821 is formed by the thickness of the outer cut-away portion of the third outer wall 382. The third positioning edge 3722 cooperates with the fourth positioning edge 3821, thereby limiting the relative movement of the second diffuser 370 and the third diffuser 380 along the axial direction, so that a stable connection is achieved between the second diffuser 370 and the third diffuser 380. The wall thickness formed after the third positioning edge 3722 and the fourth positioning edge 3821 are installed and matched is the same as that of the second outer wall 372 and the third outer wall 382, ​​thereby reducing the influence of the connection on the airflow of the pressure diffuser channel 310; and the matching structure of the third positioning edge 3722 and the fourth positioning edge 3821 can improve the sealing effect of the outer wall 330 and prevent the pressure diffuser channel 310 from leaking. It is understandable that the connection between the third positioning edge 3722 and the fourth positioning edge 3821 can also be provided with adhesives such as glue to achieve a better sealing effect. As another embodiment, the structural forms of the third positioning edge 3722 and the fourth positioning edge 3821 can be interchangeable, that is, the third positioning edge 3722 is formed by the thickness of the outer cut-out portion of the second outer wall 372, and the fourth positioning edge 3821 is formed by the thickness of the inner cut-out portion of the third outer wall 382.

[0088] Therefore, the first outer wall 362, the second outer wall 372 and the third outer wall 382 are sealed and connected, so that the outer wall 330 of the diffuser 300 forms a sealing structure, which can prevent the diffuser channel 310 from leaking air outward, improve the sealing performance of the diffuser channel 310, and ensure the diffusion effect of the diffuser 300 on the airflow.

[0089] Reference Figure 7 As shown, Figure 7 This is an enlarged bottom view of a first diffuser 360 according to an embodiment of the present invention. It can be understood that the mounting hub 365 is provided with a stator mounting seat 368, and the stator mounting seat 368 includes three support structures 369 arranged at intervals along the circumference of the diffuser 300. The support structures 369 can position or positionally install the stator assembly 500. Two, four or more support structures 369 can also be provided.

[0090] Reference Figure 7 and Figure 8 As shown, Figure 8 This is an enlarged top view of the first diffuser 360 of an embodiment of the present invention. It can be understood that the first inner wall 361 is formed by the outer wall of the mounting hub 365, and the first positioning ear 366 is stably connected to the outer wall and the bottom wall of the mounting hub 365, so that the structure of the first positioning ear 366 is more stable.

[0091] Continue to refer to Figure 7 As shown, it can be understood that the positions of the three support structures 369 and the three first positioning ears 366 are staggered along the circumference of the first diffuser 360, so that the support structures 369 and the bolts 600 are staggered with each other to avoid interference with each other, and the force on the stator assembly 500 is more balanced, which can effectively improve the stability of the connection between the stator assembly 500 and the diffuser 300.

[0092] Reference Fig. 9 and Fig.10 As shown, Fig. 9 This is an enlarged bottom view of a stator assembly 500 according to an embodiment of the present invention. Fig.10 It is an enlarged top view of a stator assembly 500 of an embodiment of the present invention. The stator assembly 500 is mounted on three support structures 369. The stator assembly 500 and the support structure 369 can be fixed by means of snap connection, bonding, etc., so that assembly is more convenient, and the matching structure of the stator assembly 500 and the rotor 420 is stable, thereby achieving stable operation of the wind turbine 1000. The stator assembly 500 includes an insulating frame 540, an iron core 520 and a winding 530. The iron core 520 surrounds the outer circumference of the insulating frame 540 and is fixed to the insulating frame 540. There are three windings 530, and the three windings 530 are wound around the inner side of the insulating frame 540 at intervals along the circumference of the insulating frame 540, so that the stator assembly 500 forms a stable structure.

[0093] Reference Fig.11 As shown, Fig.11 4 is an exploded view of a stator assembly 500 according to an embodiment of the present invention. The insulating frame 540 includes a first insulating frame 541 and a second insulating frame 542, which are respectively connected to both ends of the core 520 along the axial direction of the rotating shaft 410, so as to facilitate the assembly of the insulating frame 540. It should be noted that the first insulating frame 541 of this embodiment is located at one end facing the mounting hub 365, and the second insulating frame 542 is located at one end away from the mounting hub 365.

[0094] Continue to refer to Fig. 9As shown, the end of the second insulating frame 542 away from the mounting hub 365 is provided with a mounting ear 510 and a terminal 560, three mounting ears 510 are provided, and three terminal 560 are also provided. The mounting ears 510 and the terminal 560 are arranged at intervals along the circumference of the second insulating frame 542 on the outside of the second insulating frame 542, so that the installation of the stator assembly 500 is more convenient. In addition, the mounting ear 510 is provided with a groove 512 at the end away from the mounting hub 365, and the groove 512 can accommodate the bolt head, so as to position the bolt head, further improve the stability of the installation of the bolt 600, and avoid interference between the bolt head and other components of the fan 1000, further improving the reliability of the fan 1000.

[0095] Reference Figure 7 and Fig. 9 As shown, three support structures 369 are arranged at intervals along the circumference of the first diffuser 360, one end of the three support structures 369 is fixedly connected to the mounting hub 365 respectively, and the other end is a free end. A circumferential positioning portion 3691 and an axial positioning portion 3692 are formed at the other end of the support structure 369, and the circumferential end surface of the core 520 is positioned and matched with the circumferential positioning portion 3691, thereby limiting the circumferential freedom of the stator assembly 500, and the end surface of the first insulating frame 541 facing the mounting hub 365 is positioned and matched with the axial positioning portion 3692, thereby limiting the axial freedom of the stator assembly 500, thereby improving the installation accuracy of the stator assembly 500 and preventing the stator assembly 500 from shifting during the operation of the fan 1000.

[0096] Continue to refer to Fig.10 and Fig.11 As shown, it can be understood that the end surface of the first insulating frame 541 facing the mounting hub 365 (i.e., the end portion away from the mounting hole 511 along the axial direction of the rotating shaft 410) is provided with a positioning groove 550, and the positioning groove 550 is positioned and matched with the axial positioning portion 3692. The axial positioning portion 3692 can be inserted into the positioning groove 550, so that the positioning groove 550 and the axial positioning portion 3692 are positioned and connected, thereby facilitating the stator assembly 500 to be guided and installed on the stator mounting seat 368. Moreover, the matching structure of the positioning groove 550 and the axial positioning portion 3692 can limit the freedom of the stator assembly 500 in the circumferential and axial directions, further improve the installation accuracy of the stator assembly 500, avoid the displacement of the stator assembly 500 during the operation of the fan 1000, and improve the stability of the installation of the stator assembly 500.

[0097] In this embodiment, three positioning grooves 550 are provided, and the three positioning grooves 550 are matched with the three axial positioning parts 3692 in a one-to-one correspondence. It should be noted that the number and position of the positioning grooves 550 are set in accordance with the number and position of the axial positioning parts 3692, that is, the positioning grooves 550 can also be provided with two, four or more. The three positioning grooves 550 are evenly distributed along the circumference of the first insulating frame 541, and are positioned and connected one by one with the axial positioning parts 3692 at the three corresponding positions, so that the installation accuracy of the stator assembly 500 is higher, the installation of the stator assembly 500 and the stator mounting seat 368 is more stable, and the stability of the operation of the fan 1000 is further improved.

[0098] It should be noted that the stator assembly 500 and the support structure 369 are fixed by adhesive connection, and can also be fixed by interference fit connection or snap connection, so that after the stator assembly 500 is positioned with the circumferential positioning portion 3691 and the axial positioning portion 3692, it can be easily and quickly assembled with the stator mounting seat 368 and form a stable matching structure.

[0099] In the fan 1000 of the embodiment of the present invention, the stator assembly 500 is fixed to the mounting hub 365 by passing the bolt 600 through the mounting ear 510 and connecting the mounting hub 365, and the stator assembly 500 is also fixed to the mounting hub 365 by the stator mounting seat 368, so that the connection between the stator assembly 500 and the mounting hub 365 is more reliable. In addition, the bearing mounting seat 367 is provided on the mounting hub 365, so that the connection between the rotor assembly 400 and the mounting hub 365 is more reliable. Therefore, both the rotor assembly 400 and the stator assembly 500 can achieve a stable connection with the mounting hub 365, so that the connection between the diffuser 300, the rotor assembly 400 and the stator assembly 500 is more reliable, and the reliability of the fan 1000 is further improved.

[0100] Reference Fig.13 As shown, Fig.13 1 is an exploded view of a stator assembly 500, an electric control board 700 and a third diffuser 380 according to an embodiment of the present invention. It is understandable that the wind turbine 1000 further includes an electric control board 700, and the electric control board 700 is fixedly connected to the third diffuser 380. In addition, the electric control board 700 can also be connected to the stator assembly 500. The electric control board 700 is provided with three plug-in terminals 710, and the three plug-in terminals 710 are matched with the three wiring terminals 560 of the stator assembly 500 in a one-to-one correspondence. The wiring terminals 560 and the plug-in terminals 710 make the electrical connection structure between the stator assembly 500 and the electric control board 700 more stable, thereby improving the reliability of the wind turbine 1000.

[0101] Reference Fig.12 and Fig.13 As shown, Fig.12It is an enlarged view of the third diffuser 380 of an embodiment of the present invention. It is understood that the fan 1000 also includes a connecting arm 386, which is located at the end of the third diffuser 380 facing away from the second diffuser 370, and the connecting arm 386 is connected to the third outer wall 382 and is set as an integral structure, so that the structural strength of the connecting arm 386 is higher. Moreover, when the connecting arm 386 is set on the third outer wall 382, ​​the connecting arm 386 is not easy to interfere with the stator assembly 500, thereby improving the convenience of installation between the stator assembly 500 and the diffuser 300. It is understood that there are three connecting arms 386, and the three connecting arms 386 are arranged at intervals along the circumference of the third outer wall 382, ​​and the outer circumference of the electric control board 700 is set in a circular shape, and the end of the connecting arm 386 away from the third diffuser 380 is provided with a mounting groove 387, and the three mounting grooves 387 are respectively engaged with the electric control board 700, so as to achieve stable installation of the electric control board 700. The installation position of the installation groove 387 can also be set at any position of the connecting arm 386 along the axial direction of the rotating shaft 410, which is not specifically limited here.

[0102] Of course, the outer periphery of the electric control board 700 can also be set to a square structure, but the mounting groove 387 of the connecting arm 386 needs to match the outer periphery of the electric control board 700 to achieve a stable connection structure. In addition, two, four or more connecting arms 386 can also be set, which is not specifically limited here.

[0103] Reference Figure 2 and Figure 4 As shown, it can be understood that the rotating shaft 410 is provided with a magnetic ring 450, and the magnetic ring 450 is located at one end of the rotating shaft 410 away from the impeller 200. Correspondingly, the electric control board 700 is provided with a speed measuring module (not shown in the figure) at a position cooperating with the magnetic ring 450, so as to realize the speed measurement of the rotating shaft 410.

[0104] Reference Fig.14 and Fig.15 As shown, Fig.14 This is an enlarged view of an angle of the wind shield 100 in the fan 1000 of an embodiment of the present invention. Fig.15 This is an enlarged view of the fan 1000 from another angle in an embodiment of the present invention. The fan 100 includes a cover body 120 and a mounting wall 130. The cover body 120 is provided with an air inlet 121 at one end along the rotating shaft 410, and an air outlet 122 at the other end along the rotating shaft 410. The cover body 120 is connected to the mounting wall 130 at one end of the air outlet 122, and the mounting wall 130 is provided with a notch 131. Figure 8As shown, the first outer wall 362 is provided with a boss 3622. In the fan 1000 of the embodiment of the present invention, the notch 131 can accommodate the boss 3622, that is, the notch 131 and the boss 3622 have the same size, or the notch 131 is larger than the boss 3622.

[0105] Reference Figure 4 As shown, when the cover body 120 is installed on the first diffuser 360, the installation of the wind cover 100 and the impeller 200 is achieved by the cooperation of the boss 3622 and the slot 131, and then the cover body 120 and the first diffuser 360 are rotated relative to each other so that the boss 3622 abuts against the end face of the mounting wall 130, so that a gap is formed between the cover body 120 and the first diffuser 360, thereby forming an air gap between the impeller 200 and the inner wall 320 of the wind cover 100.

[0106] It is understandable that the design of the boss 3622 and the notch 131 can conveniently adjust the air gap between the hood 100 and the impeller 200, and the gap consistency of each position is high. In addition, the height of the boss 3622 can be adjusted to reduce the air gap between the hood 100 and the impeller 200, that is, the gap of the air inlet channel 110 can be reduced, thereby simultaneously reducing the fluid eddy loss caused by the leakage of the air inlet channel 110, and thus reducing the aerodynamic noise of the fan 1000. The matching structure of the notch 131 and the boss 3622 can be provided with multiple, and the multiple notches 131 and the multiple bosses 3622 are arranged one by one, so that the connection between the hood 100 and the first diffuser 360 is more stable, and the gap between the inner wall 320 of the hood 100 and the impeller 200 is also more stable. As another embodiment, the mounting wall 130 can be provided with a boss 3622, and the corresponding first outer wall 362 is provided with a notch 131.

[0107] Continue to refer to Fig.15 As shown, it can be understood that a reinforcing rib 140 is provided between the cover body 120 and the mounting wall 130, and a plurality of reinforcing ribs 140 are provided. The plurality of reinforcing ribs 140 are arranged at circumferential intervals along the mounting wall 130, so that the structural strength of the wind cover 100 is higher, and the wind cover 100 is prevented from shaking or deforming and causing damage to the impeller 200, and the stability of the fan 1000 is further improved.

[0108] Continue to refer to Fig.14 As shown, the inner wall 320 of the cover body 120 is a streamlined multi-section arc transition surface, which facilitates the smooth introduction of the airflow generated by the impeller 200 from the air inlet channel 110 into the pressure diffuser channel 310, thereby reducing the kinetic energy loss of the airflow. Figure 8As shown, one end of the mounting hub 365 facing the wind hood 100 is set as an arc-shaped guide surface 3652, which cooperates with the inner side of the hood body 120 to guide the airflow, further reduce the impact on the airflow, increase the airflow of the fan 1000, and improve the performance of the fan 1000.

[0109] Reference Figure 1 and Figure 2 As shown, a cleaning device according to an embodiment of the present invention can be a handheld vacuum cleaner, a barrel vacuum cleaner, or a sweeping robot, or other cleaning devices. The cleaning device according to this embodiment includes the fan 1000 of the above embodiment. The fan 1000 is a core component of the cleaning device, and generates an airflow that meets the cleaning needs during operation, thereby achieving the cleaning needs of the user.

[0110] The cleaning device of the embodiment of the present invention adopts the fan 1000 of the first aspect embodiment. The fan 1000 is configured by arranging the diffuser 300 at the air outlet end of the air inlet channel 110 formed by the wind cover 100 and the impeller 200. A diffusion channel 310 is formed between the inner wall 320 and the outer wall 330 of the diffuser 300. The rotor assembly 400 and the stator assembly 500 cooperate to drive the impeller 200 to rotate to form an airflow. The airflow enters the diffusion channel 310 through the air inlet channel 110, thereby increasing the efficiency of the fan 1000.

[0111] The stator assembly 500 is located in the accommodating cavity 350 formed by the diffuser 300 . The diffuser 300 wraps at least a portion of the stator assembly 500 , which can reduce the axial dimension of the fan 1000 , thereby making the fan 1000 highly integrated.

[0112] The stator assembly 500 and the diffuser 300 are connected by bolts 600, so that the connection between the stator assembly 500 and the diffuser 300 is more stable, and the stability of the coordination between the stator assembly 500 and the rotor assembly 400 is improved, so that the operation of the fan 1000 is more stable and more reliable, thereby improving the reliability of the cleaning equipment and extending the service life of the cleaning equipment.

[0113] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fan, characterized in that: include: An air hood, wherein an impeller is provided inside, and an air inlet channel is formed between the impeller and the air hood; a diffuser connected to the wind cover and located at the air outlet end of the air inlet channel, the diffuser comprising an inner wall, an outer wall and a diffuser blade disposed between the inner wall and the outer wall, a diffuser channel communicating with the air inlet channel is formed between the inner wall and the outer wall, and a receiving cavity is formed on the inner wall; a stator assembly, at least partially located in the accommodating cavity, the stator assembly being connected to the diffuser via a fastener; A rotor assembly, comprising a rotor and a rotating shaft, one end of the rotating shaft being connected to the impeller, the rotor being mounted on the rotating shaft and cooperating with the stator assembly to drive the impeller to rotate; The diffuser further comprises a mounting hub disposed in the accommodating cavity, the mounting hub is provided with a first positioning hole, the stator assembly is provided with a mounting hole, and the fastener is passed through the mounting hole and the first positioning hole to fix the stator assembly and the diffuser; The mounting hub is provided with a bearing mounting seat and a stator mounting seat, the rotating shaft is mounted on the bearing mounting seat through at least one bearing, and the stator assembly is mounted on the stator mounting seat; The stator mounting seat includes a plurality of support structures arranged at intervals along the circumference of the diffuser, one end of the plurality of support structures is fixedly connected to the mounting hub, and the other end is formed with a circumferential positioning portion and an axial positioning portion, the stator assembly is positioned and matched with the stator mounting seat through the circumferential positioning portion and the axial positioning portion, and the plurality of support structures and the fasteners are staggered along the circumference.

2. The fan according to claim 1, characterized in that: The diffuser includes a first diffuser and a second diffuser, the first diffuser is connected to the wind cover, the first diffuser is provided with the mounting hub, the mounting hub is provided with a first positioning ear, the first positioning hole is provided at the first positioning ear, the second diffuser is connected to an end of the first diffuser away from the wind cover, a second positioning ear is provided inside the second diffuser, the second positioning ear is matched with the first positioning ear along the axial direction of the rotating shaft, and a second positioning hole matched with the first positioning hole is provided, and the fastener is passed through the mounting hole, the second positioning hole and the first positioning hole.

3. The fan according to claim 2, characterized in that: The diffuser also includes a third diffuser, which is connected to one end of the second diffuser away from the first diffuser, and a third positioning ear is provided inside the third diffuser, and the third positioning ear is matched with the second positioning ear along the axial direction of the rotating shaft, and a third positioning hole matched with the second positioning hole is provided, and the fastener is passed through the mounting hole, the third positioning hole, the second positioning hole and the first positioning hole.

4. The fan according to claim 3, characterized in that: The mounting ear, the third positioning ear, the second positioning ear and the first positioning ear are sequentially connected along the axial direction of the rotating shaft and abut against each other for positioning.

5. The fan according to claim 1, characterized in that: The stator assembly includes an insulating frame, an iron core and a winding, wherein the iron core is wrapped around the outer side of the insulating frame, and the winding is wound around the inner side of the insulating frame; a positioning groove is provided at one end of the insulating frame away from the mounting hole along the axial direction of the rotating shaft, and the positioning groove is positioned and matched with the axial positioning portion.

6. The fan according to claim 5, characterized in that: A plurality of positioning grooves are arranged at intervals along the circumferential direction of the insulating frame and are matched with the plurality of axial positioning portions in a one-to-one correspondence.

7. The fan according to claim 2, characterized in that: At least two first positioning ears are arranged at intervals along the circumferential direction of the inner wall of the first diffuser.

8. The fan according to claim 3, characterized in that: The first diffuser includes a first inner wall, a first outer wall and a first diffuser blade, the second diffuser includes a second inner wall, a second outer wall and a second diffuser blade, and the third diffuser includes a third inner wall, a third outer wall and a third diffuser blade. The first inner wall, the second inner wall and the third inner wall are sealed and connected.

9. The fan according to claim 8, characterized in that: The first outer wall is provided with a first positioning edge, one end of the second outer wall is provided with a second positioning edge that cooperates with the first positioning edge, the other end of the second outer wall is provided with a third positioning edge, and the third outer wall is provided with a fourth positioning edge that cooperates with the third positioning edge.

10. The fan according to claim 1, characterized in that: The fan further comprises an electric control board, which is connected to one end of the diffuser away from the wind cover, the electric control board is provided with a plug-in terminal, and the stator assembly is provided with a wiring terminal matched with the plug-in terminal.

11. The fan according to claim 10, characterized in that: The fan further comprises a connecting arm, the connecting arm is connected to the diffuser, and the connecting arm is provided with a mounting groove which is positioned and matched with the electric control board.

12. The fan according to claim 1, characterized in that: The wind hood includes a hood body and a mounting wall, one end of the hood body is connected to the mounting wall, a boss and a slot are provided between the mounting wall and the outer wall, one of the boss and the slot is provided on the mounting wall, and the other is provided on the outer wall, and the slot is configured to accommodate the boss.

13. The fan according to claim 12, characterized in that: A reinforcing rib is provided between the cover body and the mounting wall, and a plurality of the reinforcing ribs are provided and are spaced apart along the circumference of the mounting wall.

14. Cleaning equipment, characterized in that: A fan comprising the fan as claimed in any one of claims 1 to 13.

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