Electric fan and cleaning equipment

Abstract

The present invention discloses an electric blower and cleaning equipment. The electric blower includes a housing assembly, a hood, a rotating impeller, and a diffuser. A stator assembly and a rotor assembly are provided inside the housing assembly. The hood is connected to the housing assembly. The rotating impeller is located inside the hood and is connected to the rotating shaft of the rotor assembly. The diffuser is provided at one end of the housing assembly facing the hood, and the diffuser is located between the rotating impeller and the housing assembly. The outer wall of the housing assembly is provided with a cylindrical portion, and the end of the cylindrical portion facing away from the hood is provided with a plurality of circumferentially distributed mounting feet, and the mounting feet are used to cooperate with the assembly structure of the cleaning equipment. The rotating impeller and the hood cooperate to generate a high-speed airflow, and the high-speed airflow is diffused by the diffuser to generate a larger suction force to meet the use requirements of the cleaning equipment. The housing assembly is provided with a plurality of mounting feet, and the mounting feet can cooperate with the assembly structure of the cleaning equipment, which helps to assemble the electric blower into the cleaning equipment and improve efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electric blowers, and in particular to an electric blower and cleaning equipment. Background Art

[0002] In the related art, electric blowers used in handheld vacuum cleaners have advantages such as small size and high speed. When the blower's motor drives the impeller to rotate, a high vacuum is created at the hood inlet. Air is drawn in through the hood opening, gains significant kinetic energy through the impeller's flow path, and then flows out through the downstream diffuser. However, the installation structure of the electric blower in a handheld vacuum cleaner is relatively complex, making it difficult to assemble and maintain. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an electric blower that is easy to assemble into a cleaning device, reduces assembly difficulty, and is convenient for later maintenance.

[0004] The present invention also proposes a cleaning device using the electric blower.

[0005] According to an embodiment of the first aspect of the present invention, an electric blower is applied to cleaning equipment, and the electric blower includes a housing assembly, a wind hood, a rotating impeller, and a diffuser. A stator assembly and a rotor assembly are arranged inside the housing assembly, the wind hood is connected to the housing assembly, the rotating impeller is located inside the wind hood, and the impeller is connected to the rotating shaft of the rotor assembly, the diffuser is arranged at one end of the housing assembly facing the wind hood, and the diffuser is located between the rotating impeller and the housing assembly; the outer wall of the housing assembly is provided with a cylindrical portion, and the end of the cylindrical portion facing away from the wind hood is provided with a plurality of circumferentially distributed mounting feet, and the mounting feet are used to cooperate with the assembly structure of the cleaning equipment.

[0006] The electric blower according to the first embodiment of the present invention has at least the following beneficial effects: the rotor assembly drives the rotating impeller to rotate at high speed, and the rotating impeller and the wind shield cooperate to generate a high-speed airflow, which is diffused by the diffuser to generate a strong suction force that meets the requirements of cleaning equipment. The housing assembly is provided with multiple mounting feet that can be compatible with the assembly structure of the cleaning equipment, facilitating the assembly of the electric blower into the cleaning equipment, simplifying the structure, and reducing assembly time.

[0007] According to some embodiments of the first aspect of the present invention, along the radial direction of the housing assembly, the mounting legs protrude from the outer wall of the cylindrical portion.

[0008] According to some embodiments of the first aspect of the present invention, along the axial direction of the shell assembly, a connecting portion is provided at the root of the mounting foot connected to the cylindrical portion, and the connecting portion extends toward the wind shield and connects to the outer wall of the cylindrical portion.

[0009] According to some embodiments of the first aspect of the present invention, the cylindrical portion and the mounting foot are an integrally formed structure.

[0010] According to some embodiments of the first aspect of the present invention, the cylindrical portion and the mounting foot are an integral plastic or metal part.

[0011] According to some embodiments of the first aspect of the present invention, a control board is further included, wherein the inner side surface of the mounting foot facing the center of the shell assembly is provided with a step surface, the control board abuts against the step surface, and the control board is fixedly connected to the mounting foot by fasteners.

[0012] The cleaning device according to the second embodiment of the present invention includes the electric blower described in the first embodiment.

[0013] According to some embodiments of the second aspect of the present invention, the cleaning equipment has a mounting sleeve, the electric blower is arranged in the inner cavity of the mounting sleeve, one end of the mounting sleeve wraps the outer wall of the wind hood, and the other end of the mounting sleeve is provided with a plurality of exhaust holes on the peripheral wall. A mounting pad is provided in the mounting sleeve, and the mounting pad has a socket that cooperates with the mounting foot.

[0014] According to some embodiments of the second aspect of the present invention, the mounting sleeve includes two half shells, and the two half shells are detachably connected along the axial direction of the electric blower.

[0015] According to some embodiments of the second aspect of the present invention, the inner wall of the mounting sleeve is provided with a soft cover, which surrounds the wind shield and abuts against the outer wall of the wind shield.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 sectional views of electric blowers according to some embodiments of the first aspect of the present invention;

[0019] Figure 2 A cross-sectional view of the cooperation between the rotating impeller and the stator impeller in an embodiment of the present invention;

[0020] Figure 3is a cross-sectional view of a stator impeller according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the stator impeller using axial blades in an embodiment of the present invention;

[0022] Figure 5 This is a schematic structural diagram of a stator impeller using radial blades in an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the rotating impeller in an embodiment of the present invention;

[0024] Figure 7 1 is a schematic diagram of the structure of a housing assembly from a top view according to an embodiment of the present invention;

[0025] Figure 8 Schematic diagram of the structure of the housing assembly connected to the stator in the embodiment of the present invention Figure 1 ;

[0026] Figure 9 for Figure 8 Schematic diagram of the structure of the stator impeller with hidden diffuser blades;

[0027] Figure 10 Schematic diagram of the structure of the housing assembly connected to the stator in the embodiment of the present invention Figure 2 ;

[0028] Figure 11 for Figure 10 Schematic diagram of the structure of the stator impeller with hidden diffuser blades;

[0029] Figure 12 A top view of the housing assembly connected to the stator impeller in an embodiment of the present invention;

[0030] Figure 13 Schematic diagram of an exploded view of a housing assembly and a stator impeller in an embodiment of the present invention;

[0031] Figure 14 is a cross-sectional view of a housing assembly and a stator assembly in some embodiments of the present invention;

[0032] Figure 15 are cross-sectional views of housing assemblies and stator assemblies in other embodiments of the present invention;

[0033] Figure 16 2 is a schematic diagram of the structure of the housing assembly in an embodiment of the present invention from a bottom-up perspective;

[0034] Figure 17 is a bottom view of the housing assembly according to an embodiment of the present invention;

[0035] Figure 18 1. It is an exploded bottom view schematic diagram of a housing assembly and a stator assembly according to an embodiment of the present invention;

[0036] Figure 19 1. It is a schematic structural diagram of a housing assembly and a stator assembly in an embodiment of the present invention from a bottom view;

[0037] Figure 20 This is a schematic diagram of the structure of the electric blower from an upward perspective according to an embodiment of the present invention;

[0038] Figure 21 Cross-sectional views of electric blowers according to other embodiments of the first aspect of the present invention;

[0039] Figure 22 This is a front view of the housing assembly in an embodiment of the present invention;

[0040] Figure 23 This is a schematic structural diagram of a mounting pad in an embodiment of the second aspect of the present invention;

[0041] Figure 24 This is a schematic structural diagram of the installation sleeve in an embodiment of the second aspect of the present invention;

[0042] Figure 25 A cross-sectional view of the mounting sleeve and the electric blower in an embodiment of the second aspect of the present invention;

[0043] Figure 26 This is a schematic structural diagram of a cleaning device in an embodiment of the second aspect of the present invention.

[0044] The accompanying figures are as follows:

[0045] Housing assembly 100, diffuser passage 101, secondary diffuser passage 102, blade retaining slot 103, cylindrical portion 110, stator mounting portion 120, mounting slot 121, first end surface 122, ventilation slot 123, inner cylindrical portion 124, secondary diffuser blade 130, rotor mounting portion 140, reinforcing rib 141, threaded hole 142, retaining slot 143, mounting foot 150, connecting portion 151, stepped surface 152;

[0046] Stator assembly 200, fluid channel 201, stator core 210, first end portion 211, winding 220, mounting portion 230, and terminal 240;

[0047] Rotor assembly 300, rotating shaft 310;

[0048] Stator impeller 400, groove 401, through hole 402, diffuser blade 410, side plate 420, second inclined surface 421, sleeve 430, retaining ring 431, inner ring plate 440, mounting cylinder 450, and limiting portion 451;

[0049] Rotating impeller 500, convex ring portion 501, first inclined surface 502, rotating blades 510, shaft sleeve 520, umbrella cover 530;

[0050] Air hood 600, air inlet 601;

[0051] Control panel 700;

[0052] Handheld vacuum cleaner 800 , cleaning portion 810 , casters 811 , connecting rod 820 , handle 830 , mounting sleeve 840 , exhaust hole 841 , mounting pad 850 , socket 851 , and soft cover 860 . DETAILED DESCRIPTION

[0053] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0054] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0055] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0056] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0057] Cleaning equipment is used to remove dust, with vacuum cleaners being the most commonly used type of cleaning equipment. The working principle of a vacuum cleaner is that the electric blower inside the vacuum cleaner rotates at high speed, sucking in air and dust from the suction port. The dust is trapped in the filter element, and the filtered air is discharged outside the vacuum cleaner.

[0058] The electric blower is the core component of a vacuum cleaner and serves as its power source. The main components of the electric blower include the blower assembly, which in turn includes a hood, a diffuser, and a rotating impeller. The diffuser and the housing remain relatively stationary (fixedly connected), and the rotating impeller rotates at high speed driven by the rotor. The air inside the rotating impeller is thrown out by centrifugal force, with large radial and tangential velocities. On the one hand, negative pressure is formed inside the rotating impeller, and external air continuously flows from the air inlet of the hood to the rotating impeller; on the other hand, the high-speed airflow thrown out by the rotating impeller is diffused by the diffuser blades on the diffuser and finally discharged. As the rotating impeller rotates at high speed, the electric blower can continuously inhale air, meeting the functional requirements of the vacuum cleaner.

[0059] The diffuser in the electric blower cooperates with the rotating impeller. In the working state, the rotating impeller rotates to generate airflow, and the airflow flows through the diffuser from the inside to the outside. The flow rate of the airflow decreases when it flows through the diffuser, thereby converting the kinetic energy of the gas into static pressure energy to achieve supercharging. Diffusers can be divided into bladed diffusers and bladeless diffusers. As the name suggests, the bladed diffuser is a diffuser with blades. The shape and angle of the blades limit the flow direction of the airflow, forcing the airflow to flow through a channel of a given geometric shape to achieve a smaller size and smaller flow loss. The diffuser involved in the present invention is a bladed diffuser, and the diffusers referred to below are all bladed diffusers. Specifically, the airflow passes through the channel formed between two adjacent blades of the diffuser. During the flow, the flow rate of the gas is reduced, thereby achieving the purpose of supercharging.

[0060] like Figure 1As shown, 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 rotating impeller 500, a wind cover 600 and a control panel 700. The housing assembly 100 is the 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 the stator mounting portion 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 cover 600 is connected to the end of the housing assembly 100, an air guide cavity is formed inside the wind cover 600, and the wind cover 600 is sealed with the outer wall of the housing assembly 100, and the rotating impeller 500 is located at the wind cover 60 0, the rotating shaft 310 of the rotor assembly 300 is fixedly connected to the rotating impeller 500, and the rotating impeller 500 is driven to rotate by the rotor assembly 300; the outer wall of the shell assembly 100 is provided with a cylindrical portion 110, and the middle part of the shell assembly 100 is provided with a stator mounting portion 120, and a diffusion channel 101 is formed between the cylindrical portion 110 and the stator mounting portion 120. The diffusion channel 101 is annular and communicates with the air guide cavity. The diffuser 400 is mounted on the stator mounting portion 120. The diffuser 400 has a plurality of diffusion blades 410, and the diffusion blades 410 are located in the diffusion channel; the shell assembly 100 can also be provided with a secondary diffusion channel 102, which is located downstream of the diffusion channel 101, and the secondary diffusion channel 102 is provided with secondary diffusion blades 130. The control board 700 is connected to one end of the housing assembly 100 away from the wind shield 600 . The control board 700 is electrically connected to the stator assembly 200 , and the operation of the driving mechanism is controlled by the control board 700 .

[0061] Reference Figures 2 to 6 As can be understood, the end of the diffuser 400 facing the rotating impeller 500 is the outer end, formed with a groove 401. A raised ring portion 501 is provided on the end of the rotating impeller 500 facing the diffuser 400. The raised ring portion 501 mates with the groove 401 and is annular in shape, extending into the interior of the groove 401. Axially, the diffuser 400 and the raised ring portion 501 partially intersect, providing a double barrier to reduce air leakage. Furthermore, the raised ring portion 501 and the inner wall of the groove 401 form a curved channel, increasing flow resistance and helping to reduce air leakage.

[0062] like Figure 2As shown, when the electric blower is running, the rotor assembly 300 drives the rotating impeller 500 to rotate at a high speed, and the rotating impeller 500 and the wind cover 600 cooperate to generate a high-speed airflow, which flows into the diffuser channel 101. Through the action of the multiple diffuser blades 410 of the diffuser 400, the airflow is decelerated and pressurized. Since the convex ring portion 501 of the rotating impeller 500 extends into the groove 401 of the diffuser 400, a staggered blockage is formed in the axial direction of the rotating impeller 500, which can greatly reduce the high-speed airflow from leaking out of the gap between the diffuser 400 and the rotating impeller 500, thereby reducing air leakage and improving the performance of the electric blower.

[0063] Reference Figure 3 As will be appreciated, the outer end of the diffuser 400 is provided with a side plate 420. Considering the high-speed rotation required by the rotating impeller 500, the annular collar 501 needs to avoid collision with other components during rotation. Therefore, the side plate 420 is also designed as an annular structure. The concentric arrangement of the collar 501 and the side plate 420 further reduces the distance between the collar 501 and the side plate 420, thereby helping to reduce air leakage. The side plate 420 can be positioned in the middle of the outer end or at the edge of the outer end, with placement at the edge being the preferred option. The proximity of the side plate 420 to the diffuser passage 101 helps to curb lateral airflow diffusion.

[0064] It is understandable that the groove 401 is located inside the side plate 420, and the convex ring portion 501 extends into the groove 401. In the axial direction of the rotating impeller 500, the side plate 420 and the convex ring portion 501 are staggered to block airflow and reduce air leakage.

[0065] It is understandable that the groove 401 can be circular, that is, the entire space within the side plate 420 is the groove 401, and the convex ring portion 501 can extend into it without affecting the rotation of the rotating impeller 500; the groove 401 can also be annular, and a sleeve 430 is further provided on the inner side of the side plate 420 at the outer end of the diffuser 400, forming an annular groove 401 between the sleeve 430 and the side plate 420. The sleeve 430 can also increase the flow resistance, thereby helping to reduce the amount of leaked air.

[0066] Reference Figure 3 and Figure 4 It is understandable that an inner ring plate 440 is also provided at the outer end portion. 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 on both sides of the convex ring portion 501. The three form a maze 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, which helps to reduce the amount of leaked air. In addition, the inner ring plate 440 also plays a role in increasing strength and improving the structural stability of the diffuser 400. Figure 1As shown, the inner ring plate 440 extends toward the rotating impeller 500 , and the gap between the inner ring plate 440 and the rotating impeller 500 is small. The direction of the leaked airflow is opposite to the flow direction driven by the rotating impeller 500 , which is beneficial to further reduce air leakage.

[0067] Reference Figure 2 It is understood that the smaller the distance between the convex ring portion 501 and the side plate 420, the more conducive it is to reducing air leakage. The opposing surfaces of the convex ring portion 501 and the side plate 420 are configured as a first inclined surface 502 and a second inclined surface 421. The first inclined surface 502 and the second inclined surface 421 are both inclined, forming an acute angle with the axis of the rotating impeller 500. A 40° angle between the first inclined surface 502 and the axis of the rotating impeller 500 is preferred. The second inclined surface 421 can be parallel to the first inclined surface 502 or non-parallel. The angle between the second inclined surface 421 and the first inclined surface 502 is controlled to be between 0 and 10°. The gap between the first inclined surface 502 and the second inclined surface 421 is narrow, and the flow length is large, which helps reduce leakage. Furthermore, during high-speed rotation of the rotating impeller 500, the first inclined surface 502 and the second inclined surface 421 are less likely to interfere with each other, which promotes stable operation of the rotating impeller 500.

[0068] Reference Figure 1 It is understood that the center of the housing assembly 100 has a rotor mounting portion 140 for mounting the rotor assembly 300. The diffuser 400 is mounted on the rotor mounting portion 140 via a sleeve 430. The sleeve 430 is connected to the outer wall of the rotor mounting portion 140. The outer wall of the rotor mounting portion 140 is a cylindrical surface, and the sleeve 430 is fitted to the cylindrical surface. Figure 4 and Figure 7 As shown, the diffuser 400 is provided with a through-hole 402. A plurality of circumferentially evenly distributed reinforcing ribs 141 are disposed between the rotor mounting portion 140 and the stator mounting portion 120. Some of the reinforcing ribs 141 are provided with threaded holes 142 that mate with the through-holes 402. Screws passing through the through-holes 402 and engaging the threaded holes 142 secure the diffuser 400. The inner ring plate 440 has notches to accommodate the screws. Alternatively, the sleeve 430 and the rotor mounting portion 140 may be secured to the diffuser 400 using an interference fit.

[0069] Reference Figure 1 As will be appreciated, to ensure axial positioning during assembly of the diffuser 400, a retaining ring 431 is provided on the inner wall of the sleeve 430. A retaining groove 143 is provided on the outer wall of the end portion of the rotor mounting portion 140 to accommodate the retaining ring 431. The retaining ring 431 fits into the retaining groove 143, ensuring axial positioning of the diffuser 400, facilitating assembly and improving efficiency. Furthermore, the retaining ring 431 fits snugly against the inner wall of the retaining groove 143, forming a multi-bend gap that helps prevent air leakage.

[0070] Reference Figure 2 and Figure 6 As can be understood, the center of the rotating impeller 500 is a shaft sleeve 520, which is used to connect to the rotating shaft 310 of the rotor assembly 300. The outer periphery of the rotating impeller 500 is an umbrella-shaped cover 530, and the outer wall of the umbrella-shaped cover is arranged with multiple rotating blades 510. The rotating impeller 500 is a one-piece structure, and the end of the umbrella-shaped cover 530 is a convex ring portion 501. The umbrella-shaped cover 530 as a whole has the function of preventing air leakage and guiding airflow during rotation. The shape of the wind shield 600 is similar to that of the umbrella-shaped cover 530. The wind shield 600 encloses the rotating impeller 500 and has an air inlet 601 for intake air.

[0071] Reference Figure 4 It can be understood that the diffuser blades of the diffuser 400 are axial blades; or, referring to Figure 5 , the diffuser blades use radial blades, which can achieve the effect of deceleration and pressure increase.

[0072] Reference Figure 1 According to some embodiments of the first aspect of the present invention, the two side walls of the diffuser channel 101 are the inner side wall and the outer side wall, and the plurality of diffuser blades 410 of the diffuser 400 are partially disposed in the diffuser channel 101. Figure 12 As shown, along the radial direction of the shell assembly 100, the width dimension of the diffuser channel 101 is S1, and the width dimension of the diffuser blade 410 is S2, satisfying S2>S1, and the width of the diffuser blade 410 is greater than that of the diffuser channel 101; Figure 8 and Figure 9 As shown, the diffuser 400 is mounted outside the stator mounting portion 120. The outer wall of the diffuser 400 serves as the inner wall of the diffuser passage 101. Blade retaining slots 103 are provided on the outer wall of the diffuser passage 101, and the outer wall is provided on the cylindrical portion 110. When the diffuser 400 is assembled, the outer ends of the diffuser blades 410 snap into the blade retaining slots 103. Blade retaining slots 103 provide ample space to accommodate the diffuser blades 410 without affecting their shape, ensuring a stable and reliable diffusion effect.

[0073] It is understandable that if Figure 10 and Figure 11 As shown, the diffuser blade 410 can also be connected to the outer wall of the diffuser channel 101, and the blade slot 103 is set on the inner wall of the diffuser channel 101. Similarly, when assembling the diffuser 400, the inner end of the diffuser blade 410 is inserted into the blade slot 103. The blade slot 103 has enough space to accommodate the diffuser blade 410, will not affect the shape of the diffuser blade 410, and the diffusion effect is stable and reliable.

[0074] Diffuser blades 410 extend into blade slots 103, eliminating the gap between them and the wall, substantially eliminating air duct leakage and improving diffusion performance. Leveraging the accommodating capacity of blade slots 103, the shape and dimensional accuracy of diffuser blades 410 can be reduced, helping to lower production costs. The curved gap formed between diffuser blades 410 and the inner wall of blade slots 103 creates a high flow resistance, reducing air leakage.

[0075] Reference Figure 1 As will be understood, the diffuser 400 is provided with a mounting tube 450, which is mounted on the stator mounting portion 120. The peripheral wall of the stator mounting portion 120 is provided with a mounting groove 121 for accommodating the mounting tube 450. A step is formed at the base of the mounting groove 121 to support the mounting tube 450. Along the radial direction of the housing assembly 100, the depth of the mounting groove 121 is equal to the thickness of the mounting tube 450. After the diffuser 400 is assembled, the outer wall of the mounting tube 450 remains flush with the peripheral wall of the stator mounting portion 120. This means that the inner wall of the diffuser passage 101 is smooth, facilitating airflow and reducing resistance.

[0076] Reference Figure 1 It can be understood that the mounting cylinder 450 is provided with a limiting portion 451, and the limiting portion 451 is located on the side facing the stator mounting portion 120. When assembling the diffuser 400, the limiting portion 451 abuts against the stator mounting portion 120 to achieve axial positioning, thereby improving the accuracy and speed of assembly and improving efficiency.

[0077] Reference Figure 12 It can be understood that, on the cross section of the housing assembly 100, the projection of the blade slot 103 is greater than or equal to the projection of the diffuser blade 410, which facilitates the installation of the diffuser blade 410 into the blade slot 103. That is, along the circumferential direction of the diffuser channel 101, the arc length occupied by the projection of the diffuser blade 410 is L1, and the arc length occupied by the projection of the blade slot 103 is L2, satisfying L2 ≥ L1. Figure 13 As shown, when the diffuser 400 is assembled to the housing assembly 100 , the diffuser blades 410 correspond to the blade slots 103 one by one, and each blade slot 103 is large enough to accommodate the diffuser blade 410 to avoid deformation of the diffuser blade 410 due to interference.

[0078] It is understandable that the smaller the gap between the diffuser blade 410 and the inner wall of the blade slot 103, the smaller the air leakage. Designing the blade slot 103 to match the shape of the diffuser blade 410 can minimize the gap, which is conducive to reducing air leakage.

[0079] It is understood that, considering that diffuser blades 410 are fixed and do not need to rotate or move during operation of the electric blower, the inner wall of blade retaining slot 103 can abut against diffuser blades 410, thereby better defining diffuser blades 410 and eliminating gaps to prevent air leakage. Furthermore, the inner wall of blade retaining slot 103 provides support for diffuser blades 410, helping diffuser blades 410 withstand airflow pressure, reducing deformation, and improving stability.

[0080] It is understandable that the inner wall of the blade slot 103 includes the bottom wall and the side wall facing the diffuser blade 410 , and may be in full contact or in partial contact.

[0081] Reference Figure 21 According to some embodiments of the first aspect of the present invention, the stator assembly 200 of the electric blower generally has a stator core 210 and a winding 220. The winding 220 is wound on the stator core 210, and the winding 220 generally protrudes to the axial ends of the stator core 210. During the operation of the electric blower, the winding 220 generates heat, but the stator assembly 200 is installed inside the housing assembly 100, and the heat dissipation condition is poor. Therefore, a fluid channel 201 is set between the stator core 210 and the stator mounting portion 120. One end of the fluid channel 201 is connected to the diffuser channel 101, and the other end is connected to the space where the winding 220 is located. The fluid channel 201 is used to promote air flow to take away heat and help cool the winding 220.

[0082] It should be understood here that, for an electric blower with only a diffuser 400, the fluid channel 201 is connected to the diffuser channel 101; for an electric blower with a two-stage diffuser, the fluid channel 201 is connected to the secondary diffuser channel 102. The following description will be made using an electric blower with a two-stage diffuser as an example.

[0083] Reference Figure 21 When the blower is in operation, high-speed air flows through the secondary diffuser channel 102 and passes through the secondary diffuser blades 130 to reduce the flow rate and expand the pressure. A fluid channel 201 is defined between the stator core 210 and the stator mounting portion 120. The high-speed airflow in the secondary diffuser channel 102 drives air flow in the fluid channel 201, removing heat and dissipating heat from the windings 220. This improves the operational stability of the stator assembly 200 and contributes to its service life.

[0084] Reference Figures 16 to 19It can be understood that the stator core 210 has a first end portion 211, which faces the air hood 600, and the stator mounting portion 120 has a first end surface 122, and the first end portion 211 abuts against the first end surface 122. A ventilation slot 123 is provided on the first end surface 122, and the ventilation slot 123 is the fluid channel 201 or the ventilation slot 123 is a part of the fluid channel 201. The ventilation slot 123 is used to connect the outside of the stator core 210 and the space where the winding 220 is located. In particular, the end of the winding 220 close to the air hood 600 is basically closed and difficult to dissipate heat. The ventilation slot 123 is used to connect the inside and the outside. Part of the airflow in the secondary diffuser channel 102 can flow into the ventilation slot 123 to dissipate heat for the winding 220, or the air in the ventilation slot 123 can be pulled by the airflow in the secondary diffuser channel 102. As long as there is air flow, the winding 220 can be helped to dissipate heat.

[0085] It is understood that the ventilation slots 123 have enough space for airflow to pass through. Figure 16 As shown, along the circumference of the stator core 210 , the ventilation slots 123 occupy an arc of at least 30 degrees.

[0086] like Figure 17 As shown, three ventilation slots 123 are provided along the circumference of the stator core 210. The arc occupied by the three ventilation slots 123 is half of the circumference, or the arc occupied by the three ventilation slots 123 exceeds half of the circumference, that is, the arc line of the ventilation slot 123 corresponding to the first end face 122 contacting the stator core 210 is at least 180 degrees, which has a large ventilation area, is conducive to air flow, and is conducive to heat dissipation of the winding 220.

[0087] It can be understood that there are more than three ventilation slots 123 and they are evenly distributed along the circumference of the shell assembly 100, which can dissipate heat in multiple directions and have a better heat dissipation effect.

[0088] It is understandable that if Figure 14 As shown, the stator mounting portion 120 is provided with an inner cylindrical portion 124, which is located at the edge of the first end surface 122 and forms the inner wall of the secondary diffuser channel 102. A gap is reserved between the inner cylindrical portion 124 and the stator core 210, and this gap is part of the fluid channel 201. A portion of the airflow flowing through the secondary diffuser channel 102 is transported through this gap and the ventilation slots 123 to the contact winding 220, helping to dissipate heat from the winding 220. Alternatively, the high-speed airflow in the secondary diffuser channel 102 draws air from the gap and the ventilation slots 123, and the air in the space surrounding the winding 220 follows this flow, thus dissipating heat.

[0089] It is understandable that if Figure 14As shown, in the axial direction of the shell assembly 100, the end of the secondary diffuser blade 130 away from the wind cover 600 is the tail end, and the tail end does not exceed the inner cylinder 124, that is, the length of the secondary diffuser channel 102 is greater than the length of the secondary diffuser blade 130. Through the blocking effect of the inner cylinder 124, the airflow flowing through the tail end reduces radial diffusion, which helps to improve the diffusion performance.

[0090] It is understandable that if Figure 14 As shown, the first end 211 is closer to the fan housing 600 than the tail end of the secondary diffuser blade 130, making the blower more compact and compact, making it easier to install in a vacuum cleaner. Of course, the tail end of the secondary diffuser blade 130 can also be located between the first end 211 and the fan housing 600, so that the airflow passing through the tail end can contact a larger surface area of ​​the stator core 210, helping to dissipate heat.

[0091] It is understandable that if Figure 15 As shown, the first end face 122 extends to the diffuser channel 101, and the tail end of the secondary diffuser blade 130 is located between the first end 211 and the wind cover 600. A portion of the airflow passing through the tail end flows along the first end face 122, and then flows through the ventilation slot 123, thereby dissipating heat to the winding 220. The airflow speed is fast, which improves the heat dissipation effect.

[0092] It is understandable that if Figure 18 As shown, on the one hand, the stator assembly 200 abuts against the first end face 122 of the stator mounting portion 120 through the first end portion 211 of the stator core 210. On the other hand, the stator assembly 200 is fixedly mounted on the stator mounting portion 120 through a plurality of mounting portions 230. The mounting portions 230 are fixedly connected to the stator mounting portion 120 through fasteners such as screws, etc., which facilitates disassembly and subsequent maintenance.

[0093] Reference Figure 21 According to some embodiments of the first aspect of the present invention, the electric blower is applied to cleaning equipment. A mounting foot 150 is provided at one end of the cylindrical portion 110 away from the wind cover 600. The multiple feet 150 are evenly distributed along the circumference, among which three mounting feet 150 are used as a preferred solution. The following is an explanation using three mounting feet 150 as an example. The function of the mounting feet 150 is to assemble in conjunction with the assembly structure of the cleaning equipment, to facilitate the fixation of the electric blower, to help assemble the electric blower into the cleaning equipment, to simplify the structure, and to reduce assembly time.

[0094] When the electric blower is in operation, the rotor assembly 300 drives the impeller 500 to rotate at high speed. The impeller 500 and the fan cover 600 cooperate to generate a high-speed airflow. This high-speed airflow passes through the diffuser channel 101, where it is decelerated and diffused by the multiple diffuser blades 410 to generate a strong suction force, meeting the requirements of the cleaning device. The high-speed rotation of the impeller 500 causes the electric blower to vibrate. The multiple mounting legs 150, in conjunction with the assembly structure of the cleaning device, restrain the electric blower, reduce the impact of vibration, and improve operational reliability.

[0095] It is understandable that the mounting foot 150 and the cylindrical portion 110 are an integral structure, and can be an injection-molded plastic part or a metal part, both of which can meet the strength requirements.

[0096] Reference Figure 22 It can be understood that in the radial direction of the shell assembly 100, the thickness of the mounting foot 150 is greater than the thickness of the cylindrical portion 110, the inner side of the mounting foot 150 is flush with the cylindrical portion 110, and the outer side of the mounting foot 150 protrudes from the outer wall of the cylindrical portion 110. The structural strength of the mounting foot 150 is greater, and it is more stable and reliable when assembled into the cleaning equipment.

[0097] Reference Figure 22 It can be understood that the mounting foot 150 is provided with a connecting portion 151, which is located at the root of the mounting foot 150 connected to the cylindrical portion 110. The connecting portion 151 extends along the axial direction of the shell assembly 100 and toward the wind cover 600. The connecting portion 151 is connected to the outer wall of the cylindrical portion 110 as a whole. The connecting portion 151 increases the stability of the connection between the mounting foot 150 and the cylindrical portion 110, and at the same time provides supporting force, reduces the risk of bending and breaking of the mounting foot 150, increases structural strength, and improves durability.

[0098] Reference Figure 20 As will be understood, the control board 700 is assembled using mounting legs 150. Three mounting legs 150 surround the control board 700. A stepped surface 152 is provided in the middle of the mounting legs 150. Stepped surface 152 abuts against the control board 700, and thus is located on the inner side of the mounting legs 150. The control board 700 is mounted on the stepped surface 152 using fasteners, which are screws, for ease of assembly and disassembly and maintenance. Furthermore, the terminal blocks 240 of the stator assembly 200 extend to the control board 700 and are electrically connected thereto via soldering. The three mounting legs 150 provide stable support for the control board 700 and protect it from collisions.

[0099] The second embodiment of the present invention provides a cleaning device, such as Figure 26As shown, taking a handheld vacuum cleaner 800 as an example, the handheld vacuum cleaner 800 includes a cleaning part 810 at the lower end, a connecting rod 820 and a handle 830. The cleaning part 810 can be provided with casters 811 for movement. The cleaning part 810 has a dust suction port. The two ends of the connecting rod 820 are connected to the cleaning part 810 and the handle 830. The handle 830 is for the user to hold. The electric fan is installed in the middle of the connecting rod 820. The electric fan generates suction when it runs, and the dust is sucked in from the dust suction port to achieve the purpose of cleaning.

[0100] Reference Figure 24 and Figure 25 It is understood that the handheld vacuum cleaner 800 is assembled with the electric blower through the mounting sleeve 840. The mounting sleeve 840 has an inner cavity for accommodating the electric blower. One end of the mounting sleeve 840 wraps around the outer wall of the wind shield 600 to prevent the electric blower from escaping from the inner cavity. The other end is a closed structure, and the peripheral wall is provided with multiple exhaust holes 841 to allow the electric blower to exhaust air. A mounting pad 850 is provided in the inner cavity, and the mounting pad 850 corresponds one-to-one with the mounting foot 150. Figure 23 The mounting pad 850 has a socket 851. During assembly, the mounting foot 150 is inserted into the socket 851 and accurately positioned, and the mounting pad 850 provides support.

[0101] Reference Figure 24 and Figure 25 It can be understood that the mounting sleeve 840 is composed of two half shells. In the axial direction of the electric blower, the two half shells are detachably connected or fixedly connected. The split mounting sleeve 840 is used to facilitate the installation of the electric blower into the inner cavity of the mounting sleeve 840 and the installation of the mounting pad 850.

[0102] Reference Figure 25 It can be understood that a soft cover 860 is provided between the mounting sleeve 840 and the electric blower. The soft cover 860 is mounted on the outer wall of the wind hood 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. Considering that the electric blower will generate vibration during operation, the soft cover 860 and the mounting pad 850 are used to absorb vibration and reduce noise, thereby improving the user experience of the handheld vacuum cleaner 800.

[0103] It is understandable that the cleaning equipment includes all technical solutions of the electric blower and has all technical effects of the electric blower, which will not be described in detail.

[0104] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the spirit of the present invention.

Claims

1. A cleaning device, characterized in that: The electric blower comprises an electric blower and a mounting sleeve. The cleaning device is assembled with the electric blower through the mounting sleeve. The mounting sleeve comprises two half shells, which are detachably connected along the axial direction of the electric blower so as to install the electric blower into the inner cavity of the mounting sleeve. One of the half shells wraps around the outer wall of the wind shield to prevent the electric blower from falling out of the inner cavity. A mounting pad is provided in the other half shell, and the mounting pad is provided with a socket for positioning the electric blower. The electric blower comprises: A housing assembly, wherein a stator assembly and a rotor assembly are disposed inside the housing assembly; an air hood connected to the housing assembly; a rotating impeller, located inside the wind shield and connected to the rotating shaft of the rotor assembly; a diffuser, disposed at one end of the housing assembly facing the wind shield, and located between the rotating impeller and the housing assembly; The outer wall of the housing assembly is provided with a cylindrical portion, and a plurality of mounting legs distributed along the circumferential direction are provided on one end of the cylindrical portion away from the wind shield, and the mounting legs are inserted into the insertion holes; The inner wall of the mounting sleeve is provided with a soft cover, the soft cover surrounds the wind shield and abuts against the outer wall of the wind shield and the inner wall of the mounting sleeve; The cleaning device further comprises a connecting rod, the two ends of which are connected to the cleaning portion and the handle, and the electric blower is mounted on the middle portion of the connecting rod through the mounting sleeve.

2. The cleaning device according to claim 1, characterized in that Along the radial direction of the housing assembly, the mounting legs protrude from the outer wall of the cylindrical portion.

3. The cleaning device according to claim 2, characterized in that Along the axial direction of the shell assembly, a connecting portion is provided at the root of the mounting leg connected to the cylindrical portion. The connecting portion extends toward the wind shield and is connected to the outer wall of the cylindrical portion.

4. The cleaning device according to claim 2 or 3, characterized in that The cylindrical portion and the mounting legs are integrally formed.

5. The cleaning device according to claim 4, characterized in that The cylindrical portion and the mounting foot are an integrated plastic or metal part.

6. The cleaning device according to claim 1, characterized in that It also includes a control board, the inner side surface of the mounting foot facing the center of the shell assembly is provided with a step surface, the control board abuts against the step surface, and the control board is fixedly connected to the mounting foot by fasteners.

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