CN214887831U - Fan and cleaning equipment - Google Patents

Abstract

The utility model discloses a fan and cleaning equipment, relating to the technical field of fans, wherein the fan comprises a fan cover, an impeller, a diffuser, a stator assembly and a rotor assembly; the diffuser is connected with the fan cover and comprises an inner wall, an outer wall and diffuser blades arranged between the inner wall and the outer wall, a diffuser passage is formed between the inner wall and the outer wall, and an accommodating cavity is formed in the inner wall; at least part of the stator assembly is positioned in the containing cavity, and the stator assembly is connected with the diffuser through a fastener; the rotor subassembly includes rotor and pivot, and the one end and the impeller of pivot are connected, and the rotor is installed in the pivot to be used for driving impeller rotation with stator module cooperation. The diffuser of the utility model wraps at least part of the stator assembly, which can reduce the axial size of the fan and ensure high integration level of the fan; stator module and diffuser pass through the fastener and are connected for be connected more stably between stator module and the diffuser, thereby make the operation of fan more stable, the reliability is higher.

Description

Fan and cleaning equipment

Technical Field

The utility model relates to a fan technical field, in particular to fan and cleaning equipment.

Background

With the development of dust collectors and other related household appliances and the rapid increase of demand, the high-speed fan is used as a core power component of products, and related indexes such as reliability and the like are the key of the quality of the products such as the dust collectors. In the related art, the requirement of small size and low weight of the high-speed blower may result in reduced reliability of the high-speed blower, and therefore, it is also necessary to optimize the product structure in order to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a fan can satisfy the needs of small-size, and the reliability is high moreover.

The utility model discloses still provide a cleaning device who has above-mentioned fan.

According to the utility model discloses fan of first aspect embodiment, include: the fan cover is internally provided with an impeller, and an air inlet channel is formed between the impeller and the fan cover; the diffuser is connected with the fan cover and positioned 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 communicated with the air inlet channel is formed between the inner wall and the outer wall, and an accommodating cavity is formed in the inner wall; the stator assembly is at least partially positioned in the accommodating cavity and is connected with the diffuser through a fastener; the rotor assembly comprises a rotor and a rotating shaft, one end of the rotating shaft is connected with the impeller, and the rotor is installed on the rotating shaft and matched with the stator assembly to drive the impeller to rotate.

According to the utility model discloses fan has following beneficial effect at least:

the diffuser is arranged at the air outlet end of an air inlet channel formed by the fan cover and the impeller, a diffusion channel is formed between the inner wall and the outer wall of the diffuser, the rotor assembly and the stator assembly are matched to drive the impeller to rotate to form air flow, and the air flow enters the diffusion channel through the air inlet channel, so that the efficiency of the fan is improved; the stator assembly is positioned in the containing cavity formed by the diffuser, and the diffuser wraps at least part of the stator assembly, so that the axial size of the fan can be reduced, and the integration level of the fan is high; stator module and diffuser pass through the fastener and are connected for be connected more stably between stator module and the diffuser, improved stator module and rotor subassembly complex stability, thereby make the operation of fan more stable, the reliability is higher.

According to some embodiments of the utility model, the diffuser is still including locating the installation hub that holds the chamber, the installation hub is equipped with first locating hole, stator module is equipped with the mounting hole, the fastener is worn to locate the mounting hole with first locating hole is with fixed stator module with the diffuser.

According to the utility model discloses a some embodiments, the diffuser includes first diffuser and second diffuser, first diffuser with the fan housing is connected, first diffuser is equipped with the installation hub, the installation hub is equipped with first location ear, first locating hole is located first location ear, the second diffuser connect in first diffuser is kept away from the one end of fan housing, the inside of second diffuser is equipped with second location ear, second location ear with first location ear is followed the axial of pivot is mated, and be equipped with the second locating hole that first locating hole is mated, the fastener is worn to locate the mounting hole the second locating hole with first locating hole.

According to some embodiments of the utility model, the diffuser still includes the third diffuser, the third diffuser connect in the second diffuser is kept away from the one end of first diffuser, the inside of third diffuser is equipped with third location ear, third location ear with second location ear is followed the axial of pivot is mated, and be equipped with the third locating hole that the second locating hole is mated, the fastener is worn to locate the mounting hole the third locating hole the second locating hole with first locating hole.

According to the utility model discloses a some embodiments, stator module is equipped with the installation ear, the installation ear the third location ear the second location ear with first location ear is followed the axial of pivot links to each other in proper order and mutual butt location.

According to some embodiments of the utility model, the installation hub is equipped with bearing mount pad and stator mount pad, the pivot through at least one bearing install in the bearing mount pad, stator module install in the stator mount pad.

According to some embodiments of the utility model, the stator mount pad includes along a plurality of bearing structure of the circumference interval arrangement of diffuser, it is a plurality of bearing structure's one end with installation hub fixed connection, the other end are formed with circumference location portion and axial location portion, stator module passes through circumference location portion with axial location portion with stator mount pad location fit.

According to some embodiments of the invention, the stator assembly comprises an insulating frame, an iron core surrounding an outer side of the insulating frame, and a winding wound inside the insulating frame; the insulating frame is equipped with the constant head tank along the axial of pivot is kept away from the one end tip of mounting hole, the constant head tank with axial location portion location cooperation.

According to the utility model discloses a few embodiments, the constant head tank is followed insulating frame's circumference interval is equipped with a plurality ofly, and with a plurality of axial positioning portion one-to-one cooperation.

According to some embodiments of the invention, the first positioning lug is provided with at least two circumferential intervals along the inner wall of the first diffuser.

According to some embodiments of the utility model, the first diffuser includes first inner wall, first outer wall and first diffusion blade, the second diffuser includes second inner wall, second outer wall and second diffusion blade, the third diffuser includes third inner wall, third outer wall and third diffusion blade, first inner wall the second inner wall with third inner wall sealing connection.

According to some embodiments of the utility model, first outer wall is equipped with first location and follows, the one end of second outer wall be equipped with first location is followed along location complex second location, the other end of second outer wall is equipped with third location and is followed, the third outer wall be equipped with the third location is followed along complex fourth location.

According to some embodiments of the utility model, the fan still includes automatically controlled board, automatically controlled board with the diffuser is kept away from the one end of fan housing is connected, automatically controlled board is equipped with the inserted sheet terminal, stator module be equipped with inserted sheet terminal complex binding post.

According to some embodiments of the utility model, the fan still includes the linking arm, the linking arm with the diffuser is connected, the linking arm be equipped with automatically controlled board location fit's mounting groove.

According to some embodiments of the utility model, the pivot is kept away from the one end of impeller is equipped with the magnetic ring, automatically controlled board be equipped with the magnetic ring complex module that tests the speed.

According to some embodiments of the present invention, the fan housing includes a housing body and an installation wall, the one end of the housing body is connected with the installation wall, the installation wall with be equipped with boss and notch between the outer wall, the boss with one of them of notch is located the installation wall, another is located the outer wall, the notch is configured to hold the boss.

According to some embodiments of the utility model, the cover body with be equipped with the strengthening rib between the installation wall, the strengthening rib is equipped with a plurality ofly and follows the circumference interval setting of installation wall.

According to the utility model discloses cleaning device of second aspect embodiment, including the fan of above embodiment.

According to the utility model discloses cleaning device has following beneficial effect at least:

by adopting the fan in the embodiment of the first aspect, the diffuser is arranged at the air outlet end of the air inlet channel formed by the fan cover and the impeller, the diffusion channel is formed between the inner wall and the outer wall of the diffuser, the rotor assembly and the stator assembly are matched to drive the impeller to rotate to form airflow, and the airflow enters the diffusion channel through the air inlet channel, so that the efficiency of the fan is improved; the stator assembly is positioned in the containing cavity formed by the diffuser, and the diffuser wraps at least part of the stator assembly, so that the axial size of the fan can be reduced, and the integration level of the fan is high; stator module and diffuser pass through the fastener and are connected for be connected more stably between stator module and the diffuser, improved stator module and rotor subassembly complex stability, thereby make the operation of fan more stable, the reliability is higher, and then has promoted cleaning device's reliability, has prolonged cleaning device's life.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is a schematic structural diagram of a fan according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a partial exploded view of a fan according to an embodiment of the present invention;

fig. 5 is an exploded view of a stator assembly and diffuser according to an embodiment of the present invention;

fig. 6 is an exploded view of a stator assembly and diffuser according to another embodiment of the present invention;

fig. 7 is an enlarged view of an angle of a first diffuser according to an embodiment of the present invention;

fig. 8 is an enlarged view of another angle of the first diffuser according to an embodiment of the present invention;

fig. 9 is an enlarged view of one angle of a stator assembly according to an embodiment of the present invention;

fig. 10 is an enlarged view of another angle of a stator assembly according to an embodiment of the present invention;

FIG. 11 is an exploded view of FIG. 10;

fig. 12 is an enlarged view of a third diffuser according to an embodiment of the present invention;

fig. 13 is an exploded view of a stator assembly, an electrical control plate, and a third diffuser in accordance with an embodiment of the present invention;

FIG. 14 is an enlarged view of an angle of the hood of FIG. 1;

fig. 15 is an enlarged view of another angle of the fan housing of fig. 1.

Reference numerals:

a fan 1000;

a fan housing 100; an air intake passage 110; a cover 120; an air inlet 121; an air outlet 122; a mounting wall 130; a notch 131; a reinforcing rib 140;

an impeller 200;

a diffuser 300; a diffuser passage 310; an inner wall 320; an outer wall 330; diffuser vanes 340; a receiving cavity 350;

a first diffuser 360; a first inner wall 361; a first outer wall 362; first locating edge 3621; a boss 3622; a first diffuser vane 363; a first diffuser passage 364; a mounting hub 365; a first positioning hole 3651; a guide surface 3652; a first positioning ear 366; a bearing mount 367; circular holes 3671; a stator mount 368; a support structure 369; a circumferential positioning portion 3691; axial locating portions 3692;

a second diffuser 370; a second inner wall 371; a second outer wall 372; second locating edge 3721; third locating edge 3722; a second diffuser vane 373; a second diffuser passage 374; the second positioning ears 375; second locating holes 3751;

a third diffuser 380; a third inner wall 381; a third outer wall 382; a fourth positioning edge 3821; a third diffuser vane 383; a third diffuser passage 384; a third positioning ear 385; a third positioning hole 3851; a connecting arm 386; a mounting groove 387;

a rotor assembly 400; a rotating shaft 410; a rotor 420; a bearing 430; a weight 440; a magnetic ring 450;

a stator assembly 500; a mounting ear 510; a mounting hole 511; a recess 512; a core 520; a winding 530; an insulating frame 540; a first insulating frame 541; a second insulating frame 542; a positioning groove 550; a connection terminal 560;

a bolt 600;

an electronic control board 700; and blade terminals 710.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper and lower directions, is the orientation or positional relationship shown on the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention.

In the description of the present invention, a plurality means two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a fan 1000 according to an embodiment of the present invention. The utility model relates to a fan 1000 of embodiment can use in cleaning equipment such as dust catcher, especially the portable equipment such as the less hand-held type dust catcher of volume requirement or robot of sweeping the floor. The utility model discloses fan 1000 rotational speed is very high, generally reaches between 8 ten thousand rpm to 15 ten thousand rpm, and fan 1000 moves under so high rotational speed, and its rotor subassembly 400 and stator module 500's operating stability is the key of fan 1000 reliability and life-span.

Referring to fig. 1 and 2, fig. 2 is a cross-sectional view of a fan 1000 according to an embodiment of the present invention. The utility model relates to a fan 1000 of embodiment, including fan housing 100, impeller 200, diffuser 300, stator module 500 and rotor subassembly 400. The impeller 200 is installed inside the wind cowl 100, and the air intake passage 110 is formed between the impeller 200 and the wind cowl 100. Impeller 200 is drivingly connected to rotor assembly 400, and rotor assembly 400 cooperates with stator assembly 500 to drive impeller 200 to rotate.

It is understood that the impeller 200 rotates to form an air flow, and the kinetic energy of the air flow increases after the air flow passes through the air inlet passage 110. The diffuser 300 is installed at the rear end of the impeller 200 in the direction of the air flow. The diffuser 300 is provided with a diffuser passage 310, the diffuser passage 310 is communicated with the air inlet passage 110, the diffuser passage 310 is located at the air outlet end of the air inlet passage 110, and after the air flow enters the diffuser passage 310, the kinetic energy of the air flow is converted into air pressure energy by the diffuser passage 310, so that the pressure of the air flow is increased, the air flow flowing out of the air outlet end of the diffuser 300 is blown farther, the efficiency of the fan 1000 is increased, and the wind power of the fan 1000 is stronger.

With continued reference to fig. 2, a diffuser 300 according to an embodiment of the present invention includes an inner wall 320, an outer wall 330, and diffuser vanes 340, the diffuser vanes 340 being disposed in the interstitial space between the inner wall 320 and the outer wall 330. It should be noted that the diffuser blades 340 are stationary blades, that is, the diffuser blades 340 are fixed to the inner wall 320, or fixed to the outer wall 330, and may also be fixed to both the inner wall 320 and the outer wall 330, and are not limited in this respect. The inner wall 320 and the outer wall 330 enclose to form a diffuser passage 310, and the diffuser passage 310 is communicated with the air inlet passage 110, so that the air flow smoothly flows into the diffuser passage 310 from the air inlet passage 110, and the pressurizing effect of the air flow is realized through the action of the diffuser blades 340. It is understood that the diffuser vanes 340 may be spaced along the circumference of the diffuser 300, the diffuser vanes 340 may also be arranged in multiple sets along the axial direction of the diffuser 300, each set of diffuser vanes 340 is spaced along the axial direction of the diffuser 300, and the parameters of each set of diffuser vanes 340 may be set to be the same or different, and the specific form is not limited herein.

Referring to fig. 2 and 3, fig. 3 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 containing cavity 350, the stator assembly 500 is located in the containing cavity 350, and the diffuser 300 covers 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 arranged in the diffuser 300, so that the axial size of the fan 1000 can be reduced, the overall integration level of the fan 1000 is high, the external dimension of the fan 1000 is reduced to the greatest extent, and the requirements of small size and low weight of the fan 1000 are met.

Referring to fig. 4, fig. 4 is a partial explosion diagram of a fan 1000 according to an embodiment of the present invention. The rotor assembly 400 according to an embodiment of the present invention includes a rotation shaft 410, a rotor 420, a balance weight 440, and a bearing 430. The rotor 420 is a permanent magnet, and the rotor 420 is sleeved on the rotating shaft 410. Correspondingly, the stator assembly 500 includes a core 520 and windings 530, and the core 520 and the windings 530 surround the outer circumference of the rotating shaft 410. The rotor 420 corresponds to the iron core 520 and the winding 530 along the axial direction of the rotating shaft 410, so that the rotor 420 and the stator assembly 500 rotate relatively, the rotating shaft 410 is driven to rotate, one end of the rotating shaft 410 is connected with the impeller 200, and the impeller 200 is driven to rotate. The balance weight 440 is sleeved on the rotating shaft 410, the balance weight 440 and the rotor 420 are distributed along the axial direction of the rotating shaft 410, one or more balance weights 440 can be arranged, and the balance weights 440 are arranged at corresponding positions of the rotating shaft 410 according to parameter requirements of different fan 1000 products, so that the stress of the rotating shaft 410 is more balanced, the rotation is more stable, and the rotation stability of the impeller 200 is further improved.

Referring to fig. 2 and 4, the diffuser 300 according to an embodiment of the present invention is provided with a mounting hub 365, the mounting hub 365 is located in the accommodating cavity 350, and 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 embodiments of the present invention, "fixedly connected" may be interpreted as being connected in a manner incapable of relative displacement with respect to each other. The mounting hub 365 is provided with a bearing mounting seat 367, and the bearing mounting seat 367 is provided with a round hole 3671. The bearing 430 is sleeved on the rotating shaft 410, and the bearing 430 is in interference fit with the wall surface of the circular hole 3671, so that the rotating shaft 410 is mounted on the bearing mounting seat 367 through the bearing 430, the rotating shaft 410 is stably connected with the mounting hub 365, and the rotating shaft 410 can stably rotate relative to the diffuser 300. It is understood that the mounting hub 365 may be provided in plurality, each of the mounting hubs 365 is provided with a bearing mounting seat 367, and the rotating shaft 410 is connected to the corresponding bearing mounting seat 367 through a plurality of bearings 430, respectively, so as to achieve a stable connection with the diffuser 300. In addition, the bearing mount 367 may be configured to receive the plurality of bearings 430, and the rotating shaft 410 may be mounted to the bearing mount 367 through the plurality of bearings 430, thereby achieving a stable connection with the diffuser 300.

It should be noted that, according to the specific structural arrangement of the fan 1000 product, the rotating shaft 410 may also be installed on the fan housing 100 or other positions of the fan 1000, and is not limited in detail here.

Continuing to refer to fig. 2 and 3, in the blower 1000 according to the embodiment of the present invention, the stator assembly 500 is connected to the diffuser 300 through the bolts 600, and the bolts 600 respectively penetrate through the stator assembly 500 and the diffuser 300 to realize the fixed connection. For example, the stator assembly 500 and the diffuser 300 respectively form a connection lug therebetween. Bolt 600 wears to locate the engaging lug in proper order and fixes to make stator module 500 and diffuser 300 realize stable connection, realize stable connection through bearing 430 between rotor assembly 400 and the diffuser 300 moreover, consequently improved stator module 500 and rotor assembly 400 complex stability, thereby make fan 1000's operation more stable, the reliability is higher. It is understood that bolt 600 may be replaced by a screw, rivet, pin, or other fastener, and the structure and principle of bolt 600 may be referred to in the embodiments of bolt, and therefore, for avoiding redundancy, the description is not repeated here.

Referring to fig. 1, it can be understood that the larger the length dimension (i.e., the length in the axial direction) of the diffuser 300, the more efficient 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 length increase. Also, the longer the length of the diffuser 300, the greater the difficulty of production. 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 assembled and assembled after being manufactured respectively by at least two diffusers 300, thereby effectively reducing the processing difficulty and improving the processing quality. And parameters such as the number, thickness, inlet angle, outlet angle, etc. of the diffuser vanes 340 among the plurality of diffusers 300 can be respectively subjected to simulation design to obtain a better combination form, thereby improving the performance of the diffuser 300. Therefore, the multi-stage diffuser 300 can be manufactured and then assembled, so that the difficulty in processing different diffuser vane 340 combinations can be reduced. For example, when the diffuser 300 is formed by injection molding, the scheme that the multistage diffuser 300 is manufactured respectively is adopted, so that the convenience of demolding among different diffuser blades 340 can be ensured, the processing precision and the yield are improved, and the performance of the fan 1000 is improved.

Referring to fig. 5, fig. 5 is an exploded view of a stator assembly 500 and diffuser 300 according to 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 fan cover 100, the other end of the first diffuser 360 is connected to the second diffuser 370, and the first diffuser 360 and the second diffuser 370 may be stably connected through bonding, clamping, and the like.

The first diffuser 360 includes a first inner wall 361, a first outer wall 362 and a first diffuser vane 363, the first diffuser vane 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 vane 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 second diffuser vanes 373, the second diffuser vanes 373 are 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 vane 373 may be fixedly attached to the second inner wall 371, or to the second outer wall 372, or to both the second inner wall 371 and the second outer wall 372. The utility model discloses fan 1000, the air-out end that the air current was followed inlet air channel 110 gets into first diffusion passageway 364 and second diffusion passageway 374 in proper order, and first diffusion blade 363 and second diffusion blade 373 produce the pressurization effect to the air current, have promoted fan 1000's efficiency.

With continued reference to fig. 4 and 5, it will be appreciated that a mounting hub 365 is provided to the first diffuser 360, the mounting hub 365 being fixedly connected to the first inner wall 361. The mounting hub 365 is provided with three first positioning holes 3651, the three first positioning holes 3651 are circumferentially spaced and uniformly distributed along the first inner wall 361, and the three first positioning holes 3651 are blind holes. The stator assembly 500 is provided with mounting ears 510, the mounting ears 510 are provided with mounting holes 511, and the mounting holes 511 are provided in three and are provided in one-to-one correspondence 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 inserted into the corresponding mounting hole 511 and the first positioning hole 3651 and is tightly fixed to the first positioning hole 3651, so that the diffuser 300 and the stator assembly 500 are fixed. In addition, first positioning hole 3651 may be provided with an internal thread matching bolt 600. As another embodiment of the present invention, the first positioning hole 3651 may be replaced by a through hole, each bolt 600 is inserted into the corresponding mounting hole 511 and the first positioning hole 3651, and the end of the first positioning hole 3651 far away from the mounting hole 511 is connected to the nut matched with the bolt 600 to realize fixation.

It is understood that the combination structure of the first positioning hole 3651, the mounting hole 511 and the bolt 600 may also be provided with two, four or more groups, and the specific number is determined according to the weight of the stator assembly 500, the inner diameter of the accommodating cavity 350 and other parameters in different products, and is not limited in detail herein.

It is understood that, as another embodiment of the present invention, the mounting hub 365 may also be mounted to the second diffuser 370, i.e., the mounting hub 365 is fixedly connected to the second inner wall 371. The structure and principles of this embodiment are similar to the embodiment in which the mounting hub 365 is mounted to the first diffuser 360, and can be understood with appropriate reference to this embodiment, and will not be repeated here to avoid redundancy.

With continued reference to fig. 5, the first diffuser 360 of an embodiment of the present invention includes first positioning ears 366, where the first positioning ears 366 are disposed on the mounting hub 365 or on the first inner wall 361. The first positioning lugs 366 are columnar structures extending along the axial direction of the diffuser 300, three first positioning lugs 366 are provided, the three first positioning lugs 366 are respectively provided with a first positioning hole 3651, and the first positioning holes 3651 can be blind holes or through holes.

The second diffuser 370 includes the second positioning lug 375, the number of the second positioning lugs 375 is three, three second positioning lugs 375 are uniformly distributed along the circumference of the second inner wall 371 on one side of the second inner wall 371 facing the accommodating cavity 350, the second positioning lug 375 is provided with a second positioning hole 3751, and the second positioning hole 3751 is a through hole.

The three second positioning lugs 375 and the three first positioning lugs 366 are respectively 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 inserted 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.

The bolts 600 connect the stator assembly 500, the first diffuser 360 and the second diffuser 370 to form a stable structure, so that the degree of freedom of the first diffuser 360 and the second diffuser 370 in the axial direction is limited, and the axial movement between the first diffuser 360 and the second diffuser 370 is effectively avoided. And through three bolts 600 wear to locate first location ear 366 and second location ear 375 respectively, can restrict first diffuser 360 and second diffuser 370 along circumferential degree of freedom, effectively avoid taking place rotation each other between first diffuser 360 and the second diffuser 370.

It is understood that the combination structure of the second positioning hole 3751, the first positioning hole 3651, the mounting hole 511 and the bolt 600 may be provided with two, four or more groups, which is not specifically limited herein.

Referring to fig. 6, fig. 6 is an exploded view of a stator assembly 500 and diffuser 300 according to another embodiment of the present invention. The diffuser 300 of 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. Wherein the structure of the first diffuser 360 and the structure of the second diffuser 370 are the same as those of the embodiment shown in fig. 5. The third diffuser 380 is connected to an end of the second diffuser 370 remote from the first diffuser 360. The third diffuser 380 includes a third inner wall 381, a third outer wall 382, and third diffuser vanes 383, the third diffuser vanes 383 are disposed between the third inner wall 381 and the third outer wall 382, and a third diffuser passage 384 is formed between the third inner wall 381 and the third outer wall 382. The third diffuser vanes 383 can be fixedly attached to the third inner wall 381, or to the third outer wall 382, or to both the third inner wall 381 and the third outer wall 382. The utility model discloses fan 1000, the air-out end that the air current was followed inlet air channel 110 gets into first diffusion passageway 364, second diffusion passageway 374 and diffusion passageway 310 that third diffusion passageway 384 formed in proper order, and first diffusion blade 363, second diffusion blade 373 and third diffusion blade 383 produce the pressurization effect to the air current, have promoted fan 1000's efficiency.

The utility model discloses third diffuser 380 includes third location ear 385, and third location ear 385 is equipped with threely, and third inner wall 381 is located towards the one side that holds chamber 350 along the circumference equipartition of third inner wall 381 to three third location ear 385, and third location ear 385 is equipped with third locating hole 3851, and third locating hole 3851 is the through-hole.

The three third positioning lugs 385, the three second positioning lugs 375 and the three first positioning lugs 366 are respectively paired 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 paired. The three bolts 600 are sequentially inserted 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.

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, so that the axial degree of freedom of the first diffuser 360, the second diffuser 370 and the third diffuser 380 is limited, and the axial movement among the first diffuser 360, the second diffuser 370 and the third diffuser 380 is effectively avoided. Moreover, three bolts 600 are respectively arranged on the first positioning lug 366, the second positioning lug 375 and the third positioning lug 385 in a penetrating manner, so that the circumferential freedom degrees of the first diffuser 360, the second diffuser 370 and the third diffuser 380 can be limited, and the first diffuser 360, the second diffuser 370 and the third diffuser 380 can be effectively prevented from rotating mutually.

Referring to fig. 2 and 3, it can be understood that the mounting lug 510, the third positioning lug 385, the second positioning lug 375, and the first positioning lug 366 are connected in sequence along the axial direction of the rotation shaft 410. Moreover, the mounting lug 510 is abutted to the third positioning lug 385, the third positioning lug 385 is abutted to the second positioning lug 375, and the second positioning lug 375 is abutted to the first positioning lug 366, so that the mounting lug 510, the third positioning lug 385, the second positioning lug 375 and the first positioning lug 366 are abutted to each other for positioning, and further the connection stability of the stator assembly 500, the third diffuser 380, the second diffuser 370 and the first diffuser 360 is improved, and the overall stability of the diffuser 300 is improved. It is understood that the third positioning lug 385, the second positioning lug 375 and the first positioning lug 366 may be provided with an anti-rotation structure, such as a matching structure of a snap groove and a snap 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.

Referring to fig. 3 and 6, it can be understood that, by the fixed connection of the bolt 600 with the first positioning lug 366, the second positioning lug 375 and the third positioning lug 385, the first inner wall 361, the second inner wall 371 and the third inner wall 381 are in sealed connection, so that the inner wall 320 of the diffuser 300 forms a sealing structure, the diffuser passage 310 and the accommodating cavity 350 can be sealed and isolated, the mutual air leakage between the diffuser passage 310 and the accommodating cavity 350 is avoided, the sealing performance of the diffuser passage 310 is improved, and the diffuser effect of the diffuser 300 on the air flow is ensured.

Referring to fig. 5, it can be appreciated that first outer wall 362 is provided with a first locating edge 3621, and one end of second outer wall 372 is provided with a second locating edge 3721 which is in locating engagement with first locating edge 3621. The first positioning edge 3621 is formed by the thickness of an inner cut-away portion of the first outer wall 362, the second positioning edge 3721 is formed by the thickness of an outer cut-away portion of the second outer wall 372 towards one end of the first outer wall 362, and the first positioning edge 3621 and the second positioning edge 3721 are matched, so that the relative movement of the first diffuser 360 and the second diffuser 370 in the axial direction is limited, and the first diffuser 360 and the second diffuser 370 are connected stably. The wall thickness formed by the first locating edge 3621 and the second locating edge 3721 after installation and matching is the same as that of the first outer wall 362 and the second outer wall 372, so that the influence of the joint on the airflow of the diffuser passage 310 is reduced; 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 diffusion channel 310 from leaking. It is understood that the joint between the first positioning edge 3621 and the second positioning edge 3721 can be further provided with an adhesive such as glue, so as to achieve a better sealing effect. As another embodiment, the first positioning edge 3621 and the second positioning edge 3721 may be interchanged, i.e., 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.

Referring to fig. 6, 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 which is matched with the third positioning edge 3722. The third positioning edge 3722 is formed by cutting a portion of the thickness of the second outer wall 372 at an inner side thereof toward an end of the third outer wall 382, the fourth positioning edge 3821 is formed by cutting a portion of the thickness of the third outer wall 382 at an outer side thereof, and the third positioning edge 3722 and the fourth positioning edge 3821 are engaged with each other, so that relative movement of the second diffuser 370 and the third diffuser 380 in the axial direction is restricted, and a stable connection is achieved between the second diffuser 370 and the third diffuser 380. The third locating edge 3722 and the fourth locating edge 3821 have the same wall thickness as the second outer wall 372 and the third outer wall 382 after being installed and matched, so that the influence of the connection on the air flow of the diffuser passage 310 is reduced; moreover, the mating structure of the third locating edge 3722 and the fourth locating edge 3821 can improve the sealing effect of the outer wall 330 and prevent leakage from the diffuser passage 310. It is understood that the joint of the third positioning edge 3722 and the fourth positioning edge 3821 can be further provided with an adhesive such as glue, so as to achieve a better sealing effect. As another embodiment, the third positioning edge 3722 and the fourth positioning edge 3821 may be interchanged, 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.

Therefore, the first outer wall 362, the second outer wall 372 and the third outer wall 382 are connected in a sealing manner, so that the outer wall 330 of the diffuser 300 forms a sealing structure, air leakage from the diffuser passage 310 to the outside can be avoided, the sealing performance of the diffuser passage 310 is improved, and the diffuser effect of the diffuser 300 on the air flow is ensured.

Referring to fig. 7, fig. 7 is a bottom enlarged view of a first diffuser 360 according to an embodiment of the present invention. It will be appreciated that the mounting hub 365 is provided with a stator mounting 368, the stator mounting 368 including three support structures 369 spaced circumferentially along the diffuser 300, the support structures 369 being capable of locating, or being positionally mounted to, the stator assembly 500. Support structure 369 may also be provided in the form of two, four or more.

Referring to fig. 7 and 8, fig. 8 is an enlarged top view of a first diffuser 360 according to an embodiment of the present invention. It will be appreciated that the first inner wall 361 is formed by the outer wall of the mounting hub 365 and the first positioning ears 366 are stably connected to the outer wall and the bottom wall of the mounting hub 365, so that the structure of the first positioning ears 366 is more stable.

With continued reference to fig. 7, it can be understood that the positions of the three support structures 369 and the three first positioning lugs 366 are staggered along the circumferential direction of the first diffuser 360, so that the support structures 369 and the bolts 600 are staggered from each other, interference between the support structures 369 and the bolts 600 is avoided, the stress of the stator assembly 500 is balanced, and the connection stability of the stator assembly 500 and the diffuser 300 can be effectively improved.

Referring to fig. 9 and 10, fig. 9 is a bottom enlarged view of a stator assembly 500 according to an embodiment of the present invention, and fig. 10 is a top enlarged view of the stator assembly 500 according to an embodiment of the present invention. The stator assembly 500 is mounted on three support structures 369. Can realize fixedly through modes such as joint, bonding between stator module 500 and the bearing structure 369 for the assembly is more convenient, and stator module 500 and rotor 420's cooperation stable in structure moreover, thereby realizes fan 1000's steady operation. Stator assembly 500 includes an insulation frame 540, a core 520, and windings 530. The iron core 520 surrounds the outer circumference of the insulating frame 540 and is fixed to the insulating frame 540. The windings 530 are provided in three, and the three windings 530 are wound around the inside of the insulating frame 540 at intervals in the circumferential direction of the insulating frame 540, thereby constituting a stable structure of the stator assembly 500.

Referring to fig. 11, fig. 11 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, and the first insulating frame 541 and the second insulating frame 542 are respectively connected to both ends of the core 520 in the axial direction of the rotating shaft 410, thereby facilitating the assembly of the insulating frame 540. It should be noted that the first insulating frame 541 is located at an end facing the mounting hub 365, and the second insulating frame 542 is located at an end facing away from the mounting hub 365.

With continued reference to fig. 9, the end of the second insulating frame 542 away from the mounting hub 365 is provided with three mounting lugs 510 and three connection terminals 560, and the mounting lugs 510 and the connection terminals 560 are arranged outside the second insulating frame 542 at intervals along the circumferential direction of the second insulating frame 542, so that the stator assembly 500 is more conveniently mounted. And the one end that installation ear 510 orientation kept away from installation hub 365 is equipped with recess 512, and recess 512 can hold the bolt head to fix a position the bolt head, further improve the stability of bolt 600 installation, avoid moreover taking place to interfere between bolt head and the other parts of fan 1000, further promoted fan 1000's reliability.

Referring to fig. 7 and 9, three support structures 369 are spaced circumferentially about the first diffuser 360, with one end of each support structure 369 being fixedly coupled to the mounting hub 365 and the other end being a free end. The other end of bearing structure 369 is formed with circumference location portion 3691 and axial location portion 3692, the circumference terminal surface and the circumference location portion 3691 location fit of iron core 520, thereby restriction stator module 500 is along the degree of freedom of circumference, first insulating frame 541 is towards the terminal surface and the axial location portion 3692 location fit of installation hub 365, thereby restriction stator module 500 is along axial degree of freedom, and then stator module 500's installation accuracy has been improved, avoid fan 1000 operation in-process stator module 500 to take place to shift.

As shown in fig. 10 and 11, it can be understood that the end surface of the first insulating frame 541 facing the mounting hub 365 (i.e., the end portion far from the mounting hole 511 in the axial direction of the rotating shaft 410) is provided with a positioning groove 550, and the positioning groove 550 is in positioning fit with the axial positioning portion 3692. Axial locating portion 3692 is insertable into locating slot 550 to provide a locating connection between locating slot 550 and axial locating portion 3692 to facilitate guided mounting of stator assembly 500 to stator mount 368. Moreover, the matching structure of the positioning groove 550 and the axial positioning portion 3692 can limit the degree of freedom of the stator assembly 500 along the circumferential direction and the axial direction, so that the mounting precision of the stator assembly 500 is further improved, the stator assembly 500 is prevented from shifting in the operation process of the fan 1000, and the mounting stability of the stator assembly 500 is improved.

In this embodiment, the number of the positioning grooves 550 is three, and the three positioning grooves 550 are correspondingly matched with the three axial positioning portions 3692 one by one. It should be noted that the number and the positions of the positioning grooves 550 are correspondingly set according to the number and the positions of the axial positioning portions 3692, that is, two, four or more positioning grooves 550 may also be provided. Three constant head tank 550 sets up along first insulating frame 541's circumference equipartition, and with the axial positioning portion 3692 one-to-one location connection in the three corresponding position for stator module 500's installation accuracy is higher, and stator module 500 is more stable with stator mount 368's installation, has further improved the stability of fan 1000 operation.

It should be noted that, stator module 500 and support structure 369 are fixed through adhesive bonding, and also can be fixed through modes such as interference fit connection or joint for stator module 500 and circumference location portion 3691 and axial location portion 3692 location back can conveniently realize with the rapid Assembly of stator mount 368, and form stable cooperation structure.

The utility model discloses fan 1000, stator module 500 wear to locate the installation ear 510 and connect installation hub 365 through bolt 600 thereby to be fixed in installation hub 365 to stator module 500 is fixed in installation hub 365 still through stator mount 368, makes stator module 500 more reliable with being connected of installation hub 365. Furthermore, the bearing mount 367 is provided on the mounting hub 365 to provide a more secure attachment of the rotor assembly 400 to the mounting hub 365. Therefore, the rotor assembly 400 and the stator assembly 500 can be stably connected to the mounting hub 365, so that the connection among 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.

Referring to fig. 13, fig. 13 is an exploded view of a stator assembly 500, an electric control plate 700 and a third diffuser 380 according to an embodiment of the present invention. It is understood that the fan 1000 further includes an electronic control board 700, and the electronic control board 700 is fixedly connected to the third diffuser 380. Additionally, an electrical control plate 700 may also be coupled to stator assembly 500. Automatically controlled board 700 is equipped with three inserted sheet terminal 710, three inserted sheet terminal 710 and stator module 500's three binding post 560 one-to-one cooperation, and binding post 560 makes stator module 500 and automatically controlled board 700's electric connection structure more stable with the cooperation of inserted sheet terminal 710 to fan 1000's reliability has been improved.

Referring to fig. 12 and 13, fig. 12 is an enlarged view of a third diffuser 380 according to an embodiment of the present invention. It will be appreciated that the fan 1000 further includes a connecting arm 386, the connecting arm 386 being located at an end of the third diffuser 380 facing away from the second diffuser 370, the connecting arm 386 being connected to the third outer wall 382 and being provided as a unitary structure such that the connecting arm 386 is structurally stronger. And when the connection arm 386 is provided at the third outer wall 382, the connection arm 386 does not easily interfere with the stator assembly 500, thereby improving convenience of installation between the stator assembly 500 and the diffuser 300. It can be understood that there are three connecting arms 386, the three connecting arms 386 are arranged along the circumferential direction of the third outer wall 382 at intervals, the outer circumferential edge of the electronic control board 700 is arranged in a circular shape, and one end of the connecting arm 386 far away from the third diffuser 380 is provided with a mounting groove 387, and the three mounting grooves 387 are respectively clamped with the electronic control board 700, so as to realize stable mounting of the electronic control board 700. The installation position of the installation groove 387 may be set at any position of the connection arm 386 in the axial direction of the rotation shaft 410, and is not particularly limited herein.

Of course, the outer peripheral edge of the electronic control board 700 may be configured as a square, but the mounting groove 387 of the connecting arm 386 needs to be matched with the outer peripheral edge of the electronic control board 700, so as to realize a stable connecting structure. In addition, the connecting arm 386 may be provided in two, four or more, which is not particularly limited herein.

Referring to fig. 2 and 4, 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) at a position matched with the magnetic ring 450, so as to measure the speed of the rotating shaft 410.

Referring to fig. 14 and 15, fig. 14 is an enlarged view of one angle of the fan housing 100 in the fan 1000 according to an embodiment of the present invention, and fig. 15 is an enlarged view of another angle of the fan housing 100 in the fan 1000 according to an embodiment of the present invention. The fan housing 100 includes a housing 120 and a mounting wall 130, wherein an air inlet 121 is disposed at one end of the housing 120 along a rotation axis 410, and an air outlet 122 is disposed at the other end of the housing 120 along the rotation axis 410. One end of the housing 120 at the air outlet 122 is connected to a mounting wall 130, and the mounting wall 130 is provided with a notch 131. With continued reference to fig. 8, the first outer wall 362 is provided with a boss 3622. The utility model discloses fan 1000, notch 131 can hold boss 3622, and notch 131 is the same with boss 3622's size promptly, or the size of notch 131 is greater than boss 3622's size.

Referring to fig. 4, when the cover body 120 is mounted on the first diffuser 360, the wind shield 100 and the impeller 200 are mounted by the matching of the boss 3622 and the slot 131, and then the cover body 120 and the first diffuser 360 are relatively rotated, so that the boss 3622 abuts against the end surface of the mounting wall 130, a gap is formed between the cover body 120 and the first diffuser 360, and an air gap is formed between the impeller 200 and the inner wall 320 of the wind shield 100.

It can be appreciated that the design of the bosses 3622 and the slots 131 can conveniently adjust the air gap between the wind shield 100 and the impeller 200, and the uniformity of the gap at each position is high. In addition, the height of the design boss 3622 can be adjusted to reduce the air gap between the fan cover 100 and the impeller 200, that is, the gap of the air inlet channel 110 can be reduced, so that the fluid eddy loss caused by the leakage of the air inlet channel 110 is synchronously reduced, and the aerodynamic noise of the fan 1000 can be reduced. The matching structures of the slot 131 and the boss 3622 may be respectively provided in a plurality, and the plurality of slots 131 and the plurality of bosses 3622 are arranged in a one-to-one correspondence manner, so that the connection between the fan housing 100 and the first diffuser 360 is more stable, and the gap between the inner wall 320 of the fan housing 100 and the impeller 200 is also more stable. As another embodiment, the mounting wall 130 may be provided with a boss 3622, and the corresponding first outer wall 362 is provided with a notch 131.

With reference to fig. 15, it can be understood that a plurality of reinforcing ribs 140 are disposed between the cover 120 and the mounting wall 130, and the plurality of reinforcing ribs 140 are disposed at intervals along the circumferential direction of the mounting wall 130, so that the structural strength of the fan housing 100 is higher, the damage to the impeller 200 due to the shaking or deformation of the fan housing 100 is avoided, and the stability of the fan 1000 is further improved.

With continued reference to fig. 14, the inner wall 320 of the cover 120 is a streamline multi-segment arc transition surface, which facilitates smooth guiding of the airflow generated by the impeller 200 from the air intake channel 110 into the diffuser channel 310, thereby reducing the kinetic energy loss of the airflow. Correspondingly, referring to fig. 8, an end of the mounting hub 365 facing the fan housing 100 is provided with an arc-shaped guide surface 3652, and the guide surface cooperates with the inner side of the cover body 120 to guide the airflow, so that the influence on the airflow is further reduced, the airflow of the fan 1000 is increased, and the performance of the fan 1000 is improved.

Referring to fig. 1 and 2, the cleaning device according to an embodiment of the present invention may be a handheld vacuum cleaner, a bucket vacuum cleaner, or a floor sweeping robot, or may be another cleaning device. The cleaning device of the embodiment includes the fan 1000 of the above embodiment, and the fan 1000 is used as a core component of the cleaning device, and generates an air flow capable of meeting the cleaning requirement in the working process, so as to meet the cleaning requirement of a user.

The utility model discloses cleaning device adopts the fan 1000 of first aspect embodiment, and fan 1000 is through setting up diffuser 300 in the air-out end of the inlet air channel 110 that fan housing 100 and impeller 200 formed, forms diffusion passageway 310 between the inner wall 320 of diffuser 300 and outer wall 330, and rotor subassembly 400 and stator module 500 cooperation drive impeller 200 rotate and form the air current, and the air current passes through inlet air channel 110 and gets into diffusion passageway 310, has increased fan 1000's efficiency.

The stator assembly 500 is located in the accommodating cavity 350 formed by the diffuser 300, and the diffuser 300 wraps at least part of the stator assembly 500, so that the axial size of the fan 1000 can be reduced, and the integration level of the fan 1000 is high.

Stator module 500 passes through bolt 600 with diffuser 300 and is connected for being connected more stably between stator module 500 and the diffuser 300, having improved stator module 500 and rotor subassembly 400 complex stability, thereby making fan 1000's operation more stable, the reliability is higher, and then has promoted cleaning device's reliability, has prolonged cleaning device's life.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (17)

1. Fan, its characterized in that includes:

the fan cover is internally provided with an impeller, and an air inlet channel is formed between the impeller and the fan cover;

the diffuser is connected with the fan cover and positioned 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 communicated with the air inlet channel is formed between the inner wall and the outer wall, and an accommodating cavity is formed in the inner wall;

the stator assembly is at least partially positioned in the accommodating cavity and is connected with the diffuser through a fastener;

the rotor assembly comprises a rotor and a rotating shaft, one end of the rotating shaft is connected with the impeller, and the rotor is installed on the rotating shaft and matched with the stator assembly to drive the impeller to rotate.

2. The fan of claim 1, wherein: the diffuser is further arranged on the installation hub of the containing cavity, the installation hub is provided with a first positioning hole, the stator assembly is provided with an installation hole, and the fastener penetrates through the installation hole and the first positioning hole to fix the stator assembly and the diffuser.

3. The fan of claim 2, wherein: the diffuser includes first diffuser and second diffuser, first diffuser with the fan housing is connected, first diffuser is equipped with the installation hub, the installation hub is equipped with first location ear, first locating hole is located first location ear, the second diffuser connect in first diffuser is kept away from the one end of fan housing, the inside of second diffuser is equipped with second location ear, second location ear with first location ear is followed the axial of pivot is mated, and be equipped with the second locating hole that first locating hole is mated, the fastener is worn to locate the mounting hole the second locating hole with first locating hole.

4. The fan of claim 3, wherein: the diffuser still includes the third diffuser, the third diffuser connect in the second diffuser is kept away from the one end of first diffuser, the inside of third diffuser is equipped with the third location ear, the third location ear with the second location ear is followed the axial of pivot is mated, and be equipped with the third locating hole that the second locating hole is mated, the fastener is worn to locate the mounting hole the third locating hole the second locating hole with first locating hole.

5. The fan of claim 4, wherein: stator module is equipped with the installation ear, the installation ear the third location ear the second location ear with first location ear is followed the axial of pivot is consecutive and mutual butt location.

6. The fan according to any one of claims 2 to 5, wherein: 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.

7. The fan of claim 6, wherein: the stator mounting seat comprises a plurality of supporting structures arranged along the circumferential direction of the diffuser at intervals, one end of each supporting structure is fixedly connected with the mounting hub, a circumferential positioning portion and an axial positioning portion are formed at the other end of each supporting structure, and the stator assembly is in positioning fit with the stator mounting seat through the circumferential positioning portions and the axial positioning portions.

8. The fan of claim 7, wherein: the stator assembly comprises an insulating frame, an iron core and a winding, wherein the iron core surrounds the outer side of the insulating frame, and the winding is wound on the inner side of the insulating frame; the insulating frame is equipped with the constant head tank along the axial of pivot is kept away from the one end tip of mounting hole, the constant head tank with axial location portion location cooperation.

9. The fan of claim 8, wherein: the locating groove is provided with a plurality of locating grooves along the circumferential interval of the insulating frame, and the locating grooves are matched with the axial positioning parts in a one-to-one correspondence mode.

10. The fan of claim 3, wherein: the first positioning lug is provided with at least two positioning lugs at intervals along the circumferential direction of the inner wall of the first diffuser.

11. The fan of claim 4, wherein: the first diffuser includes first inner wall, first outer wall and first diffuser blade, the second diffuser includes second inner wall, second outer wall and second diffuser blade, the third diffuser includes third inner wall, third outer wall and third diffuser blade, first inner wall the second inner wall with third inner wall sealing connection.

12. The fan of claim 11, wherein: 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 matched with the first positioning edge in a positioning mode, 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 matched with the third positioning edge.

13. The fan of claim 1, wherein: the fan still includes automatically controlled board, automatically controlled board with the diffuser is kept away from the one end of fan housing is connected, automatically controlled board is equipped with the inserted sheet terminal, stator module be equipped with inserted sheet terminal complex binding post.

14. The fan of claim 13, wherein: the fan further comprises a connecting arm, the connecting arm is connected with the diffuser, and the connecting arm is provided with a mounting groove matched with the electric control plate in a positioning mode.

15. The fan of claim 1, wherein: the fan housing comprises a housing body and a mounting wall, one end of the housing body is connected with the mounting wall, a boss and a notch are arranged between the mounting wall and the outer wall, one of the boss and the notch is arranged on the mounting wall, the other one of the boss and the notch is arranged on the outer wall, and the notch is configured to accommodate the boss.

16. The fan of claim 15, wherein: the cover body with be equipped with the strengthening rib between the installation wall, the strengthening rib is equipped with a plurality ofly and follows the circumference interval setting of installation wall.

17. Cleaning apparatus, its characterized in that: a fan comprising any of claims 1 to 16.

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