CN113775545A

CN113775545A - Electric fan and cleaning equipment

Info

Publication number: CN113775545A
Application number: CN202111040382.7A
Authority: CN
Inventors: 熊美健; 乔正忠
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-12-10

Abstract

The invention discloses an electric fan and cleaning equipment, wherein the electric fan comprises a shell assembly, a fan cover, a rotary impeller and a diffuser, a stator assembly and a rotor assembly are arranged in the shell assembly, the fan cover is connected with the shell assembly, the rotary impeller is positioned in the fan cover, the impeller is connected with a rotating shaft of the rotor assembly, the diffuser is arranged at one end, facing the fan cover, of the shell assembly, and the diffuser is positioned between the rotary impeller and the shell assembly; the outer wall of the shell component is provided with a cylindrical part, one end, deviating from the fan cover, of the cylindrical part is provided with a plurality of installation supporting feet distributed along the circumferential direction, and the installation supporting feet are used for being matched with an assembly structure of the cleaning equipment. The rotary impeller and the wind shield are matched to generate high-speed airflow, and the high-speed airflow is diffused through the diffuser to generate larger suction force, so that the use requirement of the cleaning equipment is met. The casing subassembly is provided with a plurality of installation stabilizer blades, and the installation stabilizer blade can cooperate cleaning equipment's assembly structure, helps assembling electric fan machine to cleaning equipment in, raises the efficiency.

Description

Electric fan and cleaning equipment

Technical Field

The invention relates to the technical field of electric fans, in particular to an electric fan and cleaning equipment.

Background

In the related art, the electric fan applied to the handheld dust collector has the advantages of small volume, high rotating speed and the like. When the motor of the electric fan drives the impeller to rotate, a large vacuum degree is formed at the inlet of the fan cover, airflow is sucked from the opening of the fan cover, and flows out through the downstream diffuser after obtaining large kinetic energy through the flow passage of the impeller. However, the mounting structure of the electric fan in the handheld dust collector is complex, and assembly and later maintenance are not facilitated.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the electric fan is convenient to assemble into cleaning equipment, reduces the assembly difficulty and is beneficial to later maintenance.

The invention also provides cleaning equipment applying the electric fan.

The electric fan comprises a shell assembly, a fan cover, a rotating impeller and a diffuser, wherein a stator assembly and a rotor assembly are arranged inside the shell assembly, the fan cover is connected to the shell assembly, the rotating impeller is positioned inside the fan cover and is connected with a rotating shaft of the rotor assembly, the diffuser is arranged at one end, facing the fan cover, of the shell assembly, and is positioned between the rotating impeller and the shell assembly; the outer wall of the shell assembly is provided with a cylindrical part, one end, deviating from the fan housing, of the cylindrical part is provided with a plurality of installation support legs distributed along the circumferential direction, and the installation support legs are used for being matched with an assembly structure of the cleaning equipment.

The electric fan according to the embodiment of the first aspect of the invention has at least the following beneficial effects: the rotor subassembly drives rotatory impeller high-speed rotatory, and rotatory impeller and fan housing cooperation produce high-speed air current, and high-speed air current carries out the diffusion through the diffuser to produce great suction, satisfy cleaning device's user demand. The shell assembly is provided with a plurality of installation supporting feet, and the installation supporting feet can be matched with an assembly structure of the cleaning equipment, so that the electric fan can be assembled in the cleaning equipment, the structure is simplified, and the assembly time is shortened.

According to some embodiments of the first aspect of the present invention, the mounting leg protrudes from an outer wall of the cylindrical portion in a radial direction of the housing assembly.

According to some embodiments of the first aspect of the present invention, a root of the mounting leg connected to the cylindrical portion is provided with a connecting portion extending toward the wind shield and connecting an outer wall of the cylindrical portion in an axial direction of the housing assembly.

According to some embodiments of the first aspect of the present invention, the cylindrical portion and the mounting leg are of an integrally formed structure.

According to some embodiments of the first aspect of the present invention, the cylindrical portion is a plastic or metal piece integral with the mounting leg.

According to some embodiments of the first aspect of the present invention, the mounting leg further comprises a control plate, an inner side surface of the mounting leg facing the center of the housing assembly is provided with a step surface, the control plate abuts against the step surface, and the control plate is fixedly connected to the mounting leg by a fastener.

The cleaning device according to the embodiment of the second aspect of the invention comprises the electric fan set forth in the embodiment of the first aspect.

According to some embodiments of the second aspect of the present invention, the cleaning device has a mounting sleeve, the electric blower is disposed in an inner cavity of the mounting sleeve, one end of the mounting sleeve wraps the outer wall of the fan housing, the peripheral wall of the other end of the mounting sleeve is provided with a plurality of air exhaust holes, a mounting pad is disposed in the mounting sleeve, and the mounting pad has a plug hole matched with the mounting support leg.

According to some embodiments of the second aspect of the present invention, the mounting sleeve comprises two half-shells detachably connected in the axial direction of the electric fan.

According to some embodiments of the second aspect of the present invention, an inner wall of the mounting sleeve is provided with a flexible cover surrounding the wind shield and abutting an outer wall of the wind shield.

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

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of an electric fan in accordance with some embodiments of the first aspect of the present invention;

FIG. 2 is a cross-sectional view of the mating of a rotating impeller and a stationary impeller in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a stationary vane in an embodiment of the present invention;

FIG. 4 is a schematic structural view of a fixed impeller of an embodiment of the present invention using axial blades;

FIG. 5 is a schematic structural view of a fixed impeller of an embodiment of the present invention using radial blades;

FIG. 6 is a schematic structural view of a rotary impeller according to an embodiment of the present invention;

FIG. 7 is a top view of the housing assembly in accordance with an embodiment of the present invention;

FIG. 8 is a first schematic structural view of the housing assembly coupled to the fixed impeller in an embodiment of the present invention;

FIG. 9 is a schematic view of a hidden diffuser vane of the fixed vane wheel of FIG. 8;

FIG. 10 is a second schematic structural view of the casing assembly coupled to the fixed impeller according to the embodiment of the present invention;

FIG. 11 is a schematic view of a hidden diffuser vane of the fixed vane wheel of FIG. 10;

FIG. 12 is a top view of the housing assembly coupled to the fixed impeller in accordance with an embodiment of the present invention;

FIG. 13 is an exploded view of the housing assembly and the stationary impeller in an embodiment of the present invention;

FIG. 14 is a cross-sectional view of a housing assembly and a stator assembly in accordance with certain embodiments of the present invention;

FIG. 15 is a cross-sectional view of a housing assembly and a stator assembly in accordance with further embodiments of the present invention;

FIG. 16 is a bottom view of the housing assembly of the present invention;

FIG. 17 is a bottom view of the housing assembly in an embodiment of the present invention;

FIG. 18 is a bottom exploded view of the housing assembly and stator assembly of an embodiment of the present invention;

FIG. 19 is a schematic bottom view of the housing assembly and stator assembly of an embodiment of the present invention;

FIG. 20 is a schematic view of a bottom view of an electric fan according to an embodiment of the present invention;

FIG. 21 is a cross-sectional view of an electric blower in accordance with further embodiments of the first aspect of the present invention;

FIG. 22 is a front view of the housing assembly in an embodiment of the present invention;

FIG. 23 is a schematic structural view of a mounting pad in an embodiment of the second aspect of the invention;

FIG. 24 is a schematic structural view of a mounting sleeve in an embodiment of a second aspect of the invention;

FIG. 25 is a cross-sectional view of a mounting sleeve and an electric fan in accordance with an embodiment of the second aspect of the present invention;

fig. 26 is a schematic structural view of a cleaning device in an embodiment of the second aspect of the present invention.

The reference numbers are as follows:

the structure comprises a shell assembly 100, a diffusion passage 101, a secondary diffusion passage 102, a blade clamping groove 103, a cylindrical part 110, a stator mounting part 120, a mounting groove 121, a first end face 122, a ventilation groove 123, an inner cylindrical part 124, a secondary diffusion blade 130, a rotor mounting part 140, a reinforcing rib 141, a threaded hole 142, a clamping groove 143, a mounting support leg 150, a connecting part 151 and a step face 152;

stator assembly 200, fluid passage 201, stator core 210, first end 211, winding 220, mounting portion 230, and connection terminal 240;

a rotor assembly 300, a rotation shaft 310;

the fixed impeller 400, the groove 401, the through hole 402, the diffuser blade 410, the side plate 420, the second inclined surface 421, the sleeve 430, the snap ring 431, the inner ring plate 440, the mounting cylinder 450 and the limiting part 451;

a rotating impeller 500, a convex ring part 501, a first inclined surface 502, a rotating blade 510, a shaft sleeve 520 and an umbrella-shaped cover 530;

a fan housing 600 and an air inlet 601;

a control board 700;

the hand-held cleaner 800, the cleaning part 810, the caster 811, the connecting rod 820, the handle 830, the mounting sleeve 840, the air exhaust hole 841, the mounting pad 850, the jack 851 and the soft cover 860.

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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to 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, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in 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 and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A cleaning apparatus is an apparatus for cleaning dust, of which a vacuum cleaner is the most commonly used cleaning apparatus. The working principle of the dust collector is that an electric fan in the dust collector runs at a high speed, air and dust are sucked from a dust suction port, the dust is retained in a filter element, and the filtered air is discharged to the outside of the dust collector.

The electric fan is a core component of the dust collector and is used as a power source of the dust collector. The electric fan mainly comprises a fan assembly, wherein the fan assembly comprises a fan cover, a diffuser and a rotary impeller. The diffuser and the shell are kept relatively static (fixedly connected), the rotating impeller rotates at a high speed under the drive of the rotor, and air in the rotating impeller is thrown out under the action of centrifugal force, so that the impeller has high radial and tangential speeds. On one hand, negative pressure is formed inside the rotary impeller, and external air continuously flows to the rotary impeller from an air inlet of the air cover; on the other hand, the high-speed airflow thrown out by the rotating impeller is diffused by the diffusion blades on the diffuser and finally discharged. Along with the high-speed rotation of the rotary impeller, the electric fan can continuously suck air, and the functional requirements of the dust collector are met.

A diffuser in the electric fan is matched with the rotary impeller, the rotary impeller rotates to generate airflow under the working state, the airflow flows through the diffuser from inside to outside, the flow speed of the airflow is reduced when the airflow flows through the diffuser, and therefore kinetic energy of the airflow is converted into static pressure energy, and pressurization is achieved. Diffusers can be divided into vaned diffusers, which as the name implies, are diffusers provided with vanes, which, by their shape and angle, limit the direction of flow, forcing the flow to pass through a passage of given geometry to achieve smaller dimensions and smaller flow losses. The diffuser related to the invention is a vaned diffuser, and the diffusers are all vaned diffusers. Specifically, the gas flow passes through a passage formed between two adjacent blades of the diffuser, and the flow velocity of the gas is reduced in the flowing process, so that the purpose of pressurization is achieved.

As shown in fig. 1, an embodiment of the first aspect of the present invention provides an electric blower, which includes a housing assembly 100, a stator assembly 200, a rotor assembly 300, a diffuser 400, a rotary impeller 500, a fan housing 600, and a control plate 700, where the housing assembly 100 is a main body of the electric blower, the stator assembly 200 and the rotor assembly 300 are installed inside the housing assembly 100, the stator assembly 200 is fixedly installed on a stator installation part 120 of the housing assembly 100, the rotor assembly 300 can rotate relative to the stator assembly 200, and the rotor assembly 300 and the stator assembly 200 constitute a driving mechanism; the wind shield 600 is connected to the end of the casing assembly 100, an air guide cavity is formed inside the wind shield 600, the wind shield 600 is hermetically connected to the outer wall of the casing assembly 100, the rotary impeller 500 is located in the air guide cavity of the wind shield 600, the rotating shaft 310 of the rotor assembly 300 is fixedly connected to the rotary impeller 500, and the rotary impeller 500 is driven to rotate by the rotor assembly 300; the outer wall of the shell assembly 100 is provided with a cylindrical part 110, the middle part of the shell assembly 100 is provided with a stator mounting part 120, a diffusion passage 101 is formed between the cylindrical part 110 and the stator mounting part 120, the diffusion passage 101 is annular, the diffusion passage 101 is communicated with the air guide cavity, the diffuser 400 is mounted on the stator mounting part 120, the diffuser 400 is provided with a plurality of diffusion blades 410, and the diffusion blades 410 are positioned in the diffusion passage; the casing assembly 100 may also be provided with a secondary diffuser passage 102, the secondary diffuser passage 102 being located downstream of the diffuser passage 101, the secondary diffuser passage 102 having secondary diffuser vanes 130 disposed therein. The control plate 700 is connected to one end of the casing assembly 100, which is away from the wind shield 600, the control plate 700 is electrically connected to the stator assembly 200, and the control plate 700 controls the driving mechanism to operate.

Referring to fig. 2 to 6, it can be understood that the end of the diffuser 400 facing the rotary impeller 500 is an outer end, the outer end is formed with a groove 401, one end of the rotary impeller 500 facing the diffuser 400 is provided with a convex ring portion 501, the convex ring portion 501 is matched with the groove 401, the convex ring portion 501 is circular and extends to the inside of the groove 401, in the axial direction of the rotary impeller 500, the diffuser 400 and the convex ring portion 501 form a structure in which parts are staggered with each other, and the diffuser 400 and the convex ring portion 401 provide double blocking to reduce air leakage. In addition, the convex ring part 501 and the inner wall of the groove 401 form a curved channel, which can increase the flow resistance and help to reduce the leaked air volume.

As shown in fig. 2, when the electric fan operates, the rotor assembly 300 drives the rotary impeller 500 to rotate at a high speed, the rotary impeller 500 and the fan housing 600 cooperate to generate a high-speed airflow, the high-speed airflow flows into the diffuser passage 101, and the airflow is decelerated and pressurized under the action of the plurality of diffuser blades 410 of the diffuser 400, and since the convex ring portion 501 of the rotary impeller 500 extends into the groove 401 of the diffuser 400, a staggered barrier is formed in the axial direction of the rotary impeller 500, so that the leakage of the high-speed airflow from a gap between the diffuser 400 and the rotary impeller 500 can be greatly reduced, the air leakage is reduced, and the performance of the electric fan is improved.

Referring to fig. 3, it can be understood that the outer end of the diffuser 400 is provided with the edge plate 420, and considering that the rotating impeller 500 needs to rotate at a high speed, the protruding ring part 501 is annular, and collision with other components needs to be avoided during rotation, the edge plate 420 is also provided as an annular structure, and the protruding ring part 501 and the edge plate 420 are concentrically arranged, so that the distance between the protruding ring part 501 and the edge plate 420 can be further reduced, and the reduction of the leaked air volume is facilitated. The edge plates 420 may be disposed in the middle of the outer end portions or at the edges of the outer end portions, wherein the edges disposed at the outer end portions are preferred, and the edge plates 420 are close to the diffusion channel 101, which is beneficial to restraining the lateral diffusion of the airflow.

It can be understood that the groove 401 is located inside the edge plate 420, the protruding ring part 501 extends into the groove 401, and the edge plate 420 and the protruding ring part 501 are staggered in the axial direction of the rotating impeller 500, so that the air flow is blocked, and the air leakage is reduced.

It is understood that the groove 401 may be circular, that is, the whole space in the side plate 420 is the groove 401, and the protruding ring part 501 can extend into the groove and does not affect the rotation of the rotary impeller 500; the groove 401 may also be circular, a sleeve 430 is further disposed at an outer end of the diffuser 400 inside the edge plate 420, the circular groove 401 is formed between the sleeve 430 and the edge plate 420, and the sleeve 430 can also play a role in increasing flow resistance and helping to reduce leaked air volume.

Referring to fig. 3 and 4, it can be understood that an inner ring plate 440 is further disposed at the outer end, the inner ring plate 440 is located between the sleeve 430 and the side plate 420, the inner ring plate 440 and the side plate 420 are distributed at two sides of the convex ring portion 501, the three form a labyrinth structure, the leaked wind must continuously bypass the side plate 420, the convex ring portion 501 and the inner ring plate 440, the flow resistance is large, and the amount of the leaked wind is reduced. In addition, the inner ring plate 440 also serves to increase strength and improve structural stability of the diffuser 400. As shown in fig. 1, the inner ring plate 440 extends toward the rotating impeller 500, a gap between the inner ring plate 440 and the rotating impeller 500 is small, and a flow direction of the leakage air flow is opposite to a flow direction driven by the rotating impeller 500, which is beneficial to further reducing the air leakage.

Referring to fig. 2, it can be understood that, the smaller the distance between the collar part 501 and the side plate 420 is, the more beneficial the reduction of the wind leakage, the first inclined surface 502 and the second inclined surface 421 are set on the opposite surfaces of the collar part 501 and the side plate 420, and both the first inclined surface 502 and the second inclined surface 421 are arranged obliquely, and the included angle formed between the first inclined surface 502 and the axis of the rotating impeller 500 is an acute angle, wherein the included angle between the first inclined surface 502 and the axis of the rotating impeller 500 is preferably 40 °, the second inclined surface 421 may be parallel to the first inclined surface 502 or non-parallel, and the included angle between the second inclined surface 421 and the first inclined surface 502 is controlled between 0 ° and 10 °. The narrow gap between the first inclined surface 502 and the second inclined surface 421 and the long flow length help to reduce the leakage. In addition, during the high-speed rotation of the rotary impeller 500, interference between the first inclined surface 502 and the second inclined surface 421 is not easily generated, which is advantageous for the stable operation of the rotary impeller 500.

Referring to fig. 1, it can be understood that the housing assembly 100 has a rotor mounting portion 140 at the center thereof for mounting the rotor assembly 300, and the diffuser 400 is mounted to the rotor mounting portion 140 through a sleeve 430, and the sleeve 430 is coupled to an outer wall of the rotor mounting portion 140. The outer wall of rotor installation department 140 is the face of cylinder, and sleeve 430 laminates in the face of cylinder, as shown in fig. 4 and 7, diffuser 400 is provided with through-hole 402, is provided with the strengthening rib 141 of a plurality of circumference equipartitions between rotor installation department 140 and the stator installation department 120, and partial strengthening rib 141 is provided with the screw hole 142 that cooperates through-hole 402, adopts the screw to pass through-hole 402 connecting thread hole 142 and can fix diffuser 400, and interior crown plate 440 has the breach in order to dodge the screw. Of course, the sleeve 430 may have an interference fit with the rotor mounting portion 140 to secure the diffuser 400.

Referring to fig. 1, it can be understood that, in consideration of the need for axial positioning when assembling diffuser 400, a snap ring 431 is disposed on an inner wall of a sleeve 430, a snap groove 143 fitted with the snap ring 431 is disposed on an outer wall of an end portion of a rotor mounting portion 140, and the snap ring 431 is fitted into the snap groove 143, so that the axial positioning of the diffuser 400 is achieved, the assembly is facilitated, and the efficiency is improved. Moreover, the snap ring 431 is attached to the inner wall of the slot 143 to form a multi-bending gap, which helps to prevent air leakage.

Referring to fig. 2 and 6, it can be understood that the center of the rotating impeller 500 is a shaft sleeve 520, the shaft sleeve 520 is used for connecting the rotating shaft 310 of the rotor assembly 300, the outer periphery of the rotating impeller 500 is an umbrella-shaped cover 530, the outer wall of the umbrella-shaped cover is provided with a plurality of rotating blades 510, the rotating impeller 500 is of an integral structure, the end of the umbrella-shaped cover 530 is a convex ring part 501, and the umbrella-shaped cover 530 has a wind-proof function as a whole to guide the airflow during the rotation. The wind shield 600 has a shape similar to that of the umbrella-shaped shield 530, and the wind shield 600 covers the rotary impeller 500 and has an air inlet 601 through which air is sucked.

Referring to fig. 4, it can be understood that the diffuser vanes of diffuser 400 are axial vanes; or, referring to fig. 5, the diffuser blades are radial blades, so that the effects of speed reduction and pressure increase can be achieved.

Referring to fig. 1, according to the electric blower fan of some embodiments of the first aspect of the present invention, two sidewalls of the diffuser passage 101 are inner sidewalls and outer sidewalls, and the plurality of diffuser blades 410 of the diffuser 400 are partially disposed in the diffuser passage 101, as shown in fig. 12, along a radial direction of the casing assembly 100, a width dimension of the diffuser passage 101 is S1, a width dimension of the diffuser blades 410 is S2, S2 > S1 is satisfied, and a width of the diffuser blades 410 is greater than that of the diffuser passage 101; as shown in fig. 8 and 9, the diffuser 400 is mounted outside the stator mounting portion 120, the outer wall of the diffuser 400 is the inner wall of the diffuser passage 101, the outer wall of the diffuser passage 101 is provided with the vane catching groove 103, and the outer wall is provided in the cylindrical portion 110. When the diffuser 400 is assembled, the outer end of the diffuser blade 410 is clamped into the blade clamping groove 103, the blade clamping groove 103 has enough space for accommodating the diffuser blade 410, the shape of the diffuser blade 410 cannot be influenced, and the diffuser effect is stable and reliable.

It can be understood that, as shown in fig. 10 and 11, the diffuser blade 410 may also be connected to the outer side wall of the diffuser passage 101, the blade slot 103 is disposed on the inner side wall of the diffuser passage 101, and likewise, when the diffuser 400 is assembled, the inner end of the diffuser blade 410 is clamped into the blade slot 103, and the blade slot 103 has enough space to accommodate the diffuser blade 410, so that the shape of the diffuser blade 410 is not affected, and the diffuser effect is stable and reliable.

The diffuser blade 410 extends into the blade slot 103, so that a gap between the diffuser blade 410 and the wall surface is eliminated, air duct leakage is basically eliminated, and the diffuser performance is improved. By utilizing the accommodation property of the blade clamping groove 103, the shape and size precision of the diffusion blade 410 can be reduced, which is beneficial to reducing the production cost. A bent gap is formed between the diffuser blade 410 and the inner wall of the blade clamping groove 103, so that the flow resistance is high, and the air leakage is reduced.

Referring to fig. 1, it can be understood that the diffuser 400 is provided with a mounting tube 450, the mounting tube 450 is fitted over the stator mounting part 120, a circumferential wall of the stator mounting part 120 is provided with a mounting groove 121 for receiving the mounting tube 450, a step is formed at a root of the mounting groove 121, and the mounting tube 450 is supported by the step. Along the radial direction of the casing assembly 100, the depth dimension of the installation groove 121 is equal to the thickness dimension of the installation cylinder 450, and after the diffuser 400 is assembled, the outer wall of the installation cylinder 450 is flush with the peripheral wall of the stator installation part 120, that is, the inner side wall of the diffuser passage 101 is flat, which is beneficial to airflow flowing and reduces resistance.

Referring to fig. 1, it can be understood that the mounting tube 450 is provided with a limiting portion 451, the limiting portion 451 is located on a side surface facing the stator mounting portion 120, and when the diffuser 400 is assembled, the limiting portion 451 abuts against the stator mounting portion 120 to achieve axial positioning, so that the assembling accuracy and speed are improved, and the assembling efficiency is improved.

Referring to fig. 12, it can be understood that, in the cross section of the casing assembly 100, the projection of the vane slot 103 is greater than or equal to the projection of the diffuser vane 410, which facilitates the installation of the diffuser vane 410 in the vane slot 103, that is, along the circumferential direction of the diffuser passage 101, the projection of the diffuser vane 410 occupies an arc length of L1, the projection of the vane slot 103 occupies an arc length of L2, and it is satisfied that L2 is greater than or equal to L1, as shown in fig. 13, when the diffuser 400 is assembled to the casing assembly 100, the diffuser vanes 410 and the vane slots 103 correspond one to one, and each vane slot 103 is sufficient to accommodate the diffuser vane 410, so as to avoid the diffuser vane 410 from being deformed due to interference.

It can be understood that the smaller the gap between the diffuser blade 410 and the inner wall of the blade clamping groove 103 is, the smaller the air leakage amount is, and the blade clamping groove 103 is designed to match the shape of the diffuser blade 410, so that the gap can be reduced as much as possible, and the air leakage amount can be reduced.

It will be appreciated that, considering that the diffuser blades 410 are fixed and do not need to rotate or move during the operation of the electric fan, the inner walls of the blade slots 103 may abut against the diffuser blades 410, thereby better defining the diffuser blades 410 and eliminating gaps to prevent air leakage. In addition, the inner wall of the blade slot 103 supports the diffuser blade 410, which is beneficial for the diffuser blade 410 to bear the pressure of the airflow, reduces the deformation and improves the stability.

It is understood that the inner wall of the vane slot 103 includes a bottom wall and a side wall facing the diffuser vane 410, and may be fully abutted or partially abutted.

Referring to fig. 21, in the blower according to some embodiments of the first aspect of the present invention, the stator assembly 200 generally has a stator core 210 and windings 220, the windings 220 are wound around the stator core 210, and the windings 220 generally protrude to two axial ends of the stator core 210, during operation of the blower, the windings 220 generate heat, but the stator assembly 200 is installed inside the casing assembly 100 and has poor heat dissipation conditions, so that a fluid passage 201 is provided between the stator core 210 and the stator mounting portion 120, one end of the fluid passage 201 communicates with the diffuser passage 101, and the other end communicates with a space where the windings 220 are located, and the fluid passage 201 is used to promote air flow to take away heat, thereby helping to cool the windings 220.

It should be understood herein that for an electric fan with only diffuser 400, then fluid passage 201 communicates with diffuser passage 101; for the electric blower having two-stage diffusion, the fluid passage 201 is communicated with the two-stage diffusion passage 102, and the electric blower having two-stage diffuser is described as an example below.

Referring to fig. 21, when the electric blower is operated, a high-speed airflow passes through the secondary diffuser passageway 102, and passes through the secondary diffuser vanes 130 to reduce the flow speed and the diffuser. Fluid passage 201 is arranged between stator core 210 and stator mounting portion 120, and the high-speed airflow flowing in secondary diffusion passage 102 can drive the air in fluid passage 201 to flow, thereby taking away the heat, helping winding 220 to dissipate heat, improving the stability of stator module 200 operation, and being beneficial to prolonging service life.

Referring to fig. 16 to 19, it can be understood that the stator core 210 has a first end 211, the first end 211 faces the wind shield 600, the stator mounting portion 120 has a first end surface 122, the first end 211 abuts against the first end surface 122, a ventilation slot 123 is disposed on the first end surface 122, the ventilation slot 123 is the fluid passage 201 or the ventilation slot 123 is a part of the fluid passage 201, the ventilation slot 123 is used to communicate the outside of the stator core 210 with the space where the winding 220 is located, especially the end of the winding 220 close to the wind shield 600, the position of the air inlet is basically closed, heat dissipation is difficult, the inside and the outside are communicated through the ventilation groove 123, part of the air flow in the secondary diffusion passage 102 may flow in through the ventilation slots 123 to dissipate heat of the winding 220, or the air in the ventilation slots 123 is pulled by the air flow in the secondary diffusion passage 102, so long as the air flow can help the winding 220 dissipate heat.

It is understood that the ventilation slots 123 have enough space for the air flow to pass through, and as shown in fig. 16, the ventilation slots 123 occupy an arc of at least 30 degrees in the circumferential direction of the stator core 210.

As shown in fig. 17, along the circumferential direction of the stator core 210, three ventilation slots 123 are provided, the circular arc occupied by the three ventilation slots 123 is half of the circumference, or the circular arc occupied by the three ventilation slots 123 exceeds half of the circumference, that is, the arc line of the ventilation slots 123 contacting the stator core 210 corresponding to the first end surface 122 is at least 180 degrees, and the ventilation area is large, which is beneficial to air flow and heat dissipation of the winding 220.

It can be understood that the ventilation slots 123 are more than three and are uniformly distributed along the circumferential direction of the housing assembly 100, so that heat dissipation is achieved in multiple directions, and the heat dissipation effect is better.

It is understood that, as shown in fig. 14, the stator mounting portion 120 is provided with an inner cylindrical portion 124, the inner cylindrical portion 124 is located at the edge of the first end surface 122, and the inner cylindrical portion 124 forms the inner wall of the secondary diffusion passage 102, and a gap is reserved between the inner cylindrical portion 124 and the stator core 210, which is a part of the fluid passage 201. Part of the air flow flowing through the secondary diffuser passage 102 is conveyed to the contact winding 220 through the gap and the ventilation slot 123 to help the winding 220 dissipate heat; alternatively, the air in the gap and the ventilation slot 123 is guided by the high-speed airflow in the secondary diffusion passage 102, and the air in the space where the winding 220 is located flows along with the air, so as to perform the heat dissipation function.

It can be understood that, as shown in fig. 14, in the axial direction of the casing assembly 100, the end of the secondary diffuser vane 130 facing away from the wind shield 600 is the tail end, and the tail end does not exceed the inner cylinder 124, that is, the length of the secondary diffuser passage 102 is greater than the length of the secondary diffuser vane 130, and by the blocking effect of the inner cylinder 124, the airflow flowing through the tail end reduces the radial diffusion, which helps to improve the diffuser performance.

It will be appreciated that as shown in fig. 14, the first end 211 is closer to the shroud 600 than the trailing end of the secondary diffuser blade 130, and the electric fan is more compact and compact in structure, and is easy to assemble into a vacuum cleaner. Of course, the tail end of the secondary diffuser blade 130 may also be located between the first end 211 and the wind shield 600, and the airflow passing through the tail end can contact a larger surface of the stator core 210 to help dissipate heat.

It can be understood that, as shown in fig. 15, the first end surface 122 extends to the diffuser passage 101, the tail end of the secondary diffuser blade 130 is located between the first end 211 and the wind shield 600, and a part of the airflow passing through the tail end flows through the first end surface 122 and then flows through the wind grooves 123, so as to dissipate heat from the windings 220, and the airflow speed is high, thereby improving the heat dissipation effect.

It can be understood that, as shown in fig. 18, on one hand, the stator assembly 200 abuts against the first end surface 122 of the stator mounting portion 120 through the first end portion 211 of the stator core 210, and on the other hand, the stator assembly 200 is fixedly mounted on the stator mounting portion 120 through the plurality of mounting portions 230, and the mounting portions 230 are fixedly connected to the stator mounting portion 120 through fasteners such as screws, which facilitates the disassembly and the post-maintenance.

Referring to fig. 21, in the electric fan according to some embodiments of the first aspect of the present invention, when the electric fan is applied to a cleaning device, the end of the cylindrical portion 110 away from the fan housing 600 is provided with the mounting feet 150, and the plurality of feet 150 are uniformly distributed along the circumferential direction, wherein three mounting feet 150 are preferred, and hereinafter, three mounting feet 150 are taken as an example for description, and the mounting feet 150 function to be assembled in cooperation with the assembling structure of the cleaning device, so as to fix the electric fan, facilitate assembling the electric fan into the cleaning device, simplify the structure, and reduce the assembling time.

When the electric fan operates, the rotor assembly 300 drives the rotating impeller 500 to rotate at a high speed, the rotating impeller 500 and the fan cover 600 are matched to generate high-speed airflow, and the high-speed airflow passes through the diffusion channel 101 and is decelerated and diffused by the aid of the plurality of diffusion blades 410 to generate large suction force, so that the use requirement of cleaning equipment is met. The rotating impeller 500 rotating at a high speed causes the electric fan to generate vibration, and the plurality of mounting legs 150 can limit the electric fan in cooperation with the assembly structure of the cleaning device, thereby reducing the influence of the vibration and improving the use reliability.

It can be understood that the mounting leg 150 and the cylindrical portion 110 are an integral structure, and may be an injection molded plastic part or a metal part, which can meet the strength requirement.

Referring to fig. 22, it can be understood that, in the radial direction of the housing assembly 100, the thickness of the mounting leg 150 is greater than that of the cylindrical portion 110, the inner side of the mounting leg 150 is flush with the cylindrical portion 110, the outer side of the mounting leg 150 protrudes out of the outer wall of the cylindrical portion 110, and the mounting leg 150 has greater structural strength and is more firmly and reliably assembled into the cleaning device.

Referring to fig. 22, it can be understood that the mounting leg 150 is provided with a connecting portion 151, the connecting portion 151 is located at a root of the mounting leg 150 connected to the cylindrical portion 110, the connecting portion 151 extends along an axial direction of the housing assembly 100 and is connected with an outer wall of the cylindrical portion 110 to form a whole towards the wind shield 600, and the connecting portion 151 increases the connection stability between the mounting leg 150 and the cylindrical portion 110, and simultaneously provides a supporting force, reduces the risk of bending and breaking of the mounting leg 150, increases the structural strength, and improves the durability.

Referring to fig. 20, it can be understood that the control panel 700 is assembled by the mounting legs 150, three mounting legs 150 surround the control panel 700, the middle portion of the mounting legs 150 is provided with a step surface 152, the step surface 152 abuts against the control panel 700, so that the step surface 152 is located on the inner side surface of the mounting legs 150, the control panel 700 is mounted on the step surface 152 by fasteners, and the fasteners are screws, which are convenient for disassembly and maintenance. In addition, the connection terminals 240 of the stator assembly 200 extend to the control board 700 and are electrically connected to the control board 700 by soldering. The three mounting legs 150 stably support the control panel 700 and can protect the control panel 700 to reduce a collision.

A cleaning apparatus according to an embodiment of the second aspect of the present invention is provided, as shown in fig. 26, in which a handheld vacuum cleaner 800 is taken as an example, the handheld vacuum cleaner 800 includes a cleaning portion 810 at a lower end, a connecting rod 820 and a handle 830, the cleaning portion 810 can be provided with casters 811 for movement, the cleaning portion 810 has a dust suction opening, two ends of the connecting rod 820 are connected to the cleaning portion 810 and the handle 830, the handle 830 is used for being held by a user, an electric fan is installed in the middle of the connecting rod 820, and the electric fan operates to generate suction force to suck dust from the dust suction opening, so as to achieve the purpose of cleaning.

Referring to fig. 24 and 25, it can be understood that the hand-held cleaner 800 is equipped with the electric fan through the mounting sleeve 840, the mounting sleeve 840 has an inner cavity for accommodating the electric fan, one end of the mounting sleeve 840 wraps the outer wall of the wind shield 600 to prevent the electric fan from being removed from the inner cavity, the other end is a closed structure, and the peripheral wall is provided with a plurality of air exhaust holes 841 for the electric fan to exhaust air. Mounting pads 850 are disposed in the internal cavity, the mounting pads 850 corresponding one-to-one with the mounting feet 150. Referring to fig. 23, mounting pad 850 has a socket 851, and mounting legs 150 are inserted into socket 851 and positioned accurately when assembled, and mounting pad 850 provides support.

Referring to fig. 24 and 25, it can be understood that the mounting sleeve 840 is composed of two half shells, and the two half shells are detachably connected or fixedly connected in the axial direction of the electric fan, and the split mounting sleeve 840 is adopted, so that the electric fan can be conveniently installed in the inner cavity of the mounting sleeve 840, and the mounting pad 850 can be conveniently installed.

Referring to fig. 25, it can be understood that a soft cover 860 is disposed between the mounting sleeve 840 and the electric fan, the soft cover 860 is sleeved on the outer wall of the fan housing 600 and abuts against the inner wall of the mounting sleeve 840, the soft cover 860 is made of soft materials such as rubber, and the mounting pad 850 is also made of soft materials such as rubber, so that the electric fan can vibrate during operation, and the soft cover 860 and the mounting pad 850 are used for absorbing vibration and reducing noise, thereby improving the use experience of the handheld dust collector 800.

It can be understood that all technical solutions of the cleaning device including the electric blower have all technical effects of the electric blower, and are not described in detail.

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 within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. An electric fan for a cleaning device, comprising:

the motor comprises a shell assembly, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are arranged inside the shell assembly;

the fan cover is connected to the shell assembly;

the rotating impeller is positioned inside the fan cover and is connected with the rotating shaft of the rotor assembly;

the diffuser is arranged at one end, facing the fan cover, of the shell assembly and is positioned between the rotary impeller and the shell assembly;

the outer wall of the shell assembly is provided with a cylindrical part, one end, deviating from the fan housing, of the cylindrical part is provided with a plurality of installation support legs distributed along the circumferential direction, and the installation support legs are used for being matched with an assembly structure of the cleaning equipment.

2. The electric fan of claim 1 wherein the mounting feet project from an outer wall of the cylindrical portion in a radial direction of the housing assembly.

3. The electric fan according to claim 2, wherein a connecting portion is provided at a root of the mounting leg connected to the cylindrical portion in an axial direction of the housing assembly, the connecting portion extending toward the fan housing and connecting an outer wall of the cylindrical portion.

4. The electric fan of claim 2 or 3, wherein the cylindrical portion and the mounting leg are of an integrally formed structure.

5. The electric fan of claim 4 wherein the cylindrical portion is a unitary plastic or metal piece with the mounting foot.

6. The electric fan according to claim 1, further comprising a control board, wherein a step surface is provided on an inner side surface of the mounting leg facing the center of the housing assembly, the control board abuts against the step surface, and the control board is fixedly connected to the mounting leg by a fastener.

7. Cleaning device, characterized in that it comprises an electric fan according to any one of claims 1 to 6.

8. The cleaning device as claimed in claim 7, wherein the cleaning device has a mounting sleeve, the electric fan is disposed in an inner cavity of the mounting sleeve, one end of the mounting sleeve wraps the outer wall of the fan housing, the peripheral wall of the other end of the mounting sleeve is provided with a plurality of air exhaust holes, a mounting pad is disposed in the mounting sleeve, and the mounting pad has a plug hole for fitting the mounting leg.

9. The cleaning apparatus defined in claim 8, wherein the mounting sleeve comprises two half-shells that are removably connected in an axial direction of the electric fan.

10. The cleaning apparatus defined in claim 8, wherein an inner wall of the mounting sleeve is provided with a flexible shroud that surrounds the hood and abuts an outer wall of the hood.