CN114847823A

CN114847823A - Centrifugal filter device and sweeper

Info

Publication number: CN114847823A
Application number: CN202210499025.5A
Authority: CN
Inventors: 黄信铭; 黄术生; 向江山
Original assignee: Shenzhen Water World Co Ltd
Current assignee: Shenzhen Water World Co Ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-08-05

Abstract

The invention discloses a centrifugal filter device and a sweeper, comprising: the first centrifugal filtering component comprises a first flat plate, the first flat plate is provided with a first opening used for being communicated with the filter screen, a first annular side wall is arranged along a first direction corresponding to the first opening, the first direction is a vertical downward direction, a second annular side wall is formed on the outer side of the first flat plate along the first direction, and an air inlet hole is formed in the second annular side wall; the second centrifugal filter assembly comprises a second flat plate and an air deflector, and the air deflector is arranged on the second flat plate; the second annular side wall is connected with the second plate to form a chamber; an air gap is formed between the first annular side wall and the second flat plate. The air flow containing dust flows to the centrifugal filter device, enters the centrifugal filter device from the air inlet hole on the outer side of the first centrifugal filter component, passes through the air deflector and the chamber on the second centrifugal filter component, and is rotated to generate a centrifugal phenomenon so as to be centrifugally filtered and collected, so that the problem that the dust blocks the air channel to enter the fan is effectively solved.

Description

Centrifugal filter device and sweeper

Technical Field

The invention relates to the technical field of household appliances, in particular to a centrifugal filtering device and a sweeper.

Background

Along with the gradual improvement of science and technology, more and more families begin to use the machine of sweeping the floor to clean, and when the machine of sweeping the floor cleaned ground, its principle was through the rotatory suction that produces of the fan of inside setting. The existing sweeper is generally provided with a fan, the fan is installed in an installation chamber, a filter screen is arranged between the installation chamber and a dust box for protecting the fan from being damaged by sand and dust, so that the circulation of air flow is realized, dust particles contained in the air flowing to the fan are reduced, but the filter screen is easily blocked by the dust particles, and the efficiency of the fan is greatly reduced, and even an air channel is directly blocked.

Disclosure of Invention

The invention provides a centrifugal filtering device and a sweeper, and aims to solve the technical problem that dust blocks an air duct and enters a fan.

In order to achieve the above object, the present invention provides a centrifugal filter device comprising:

the first centrifugal filtering assembly comprises a first flat plate, the first flat plate is provided with a first opening, the first opening is used for being communicated with a filter screen, a first annular side wall is arranged along a first direction corresponding to the first opening, the first direction is a vertical downward direction, the outer side of the first flat plate forms a second annular side wall along the first direction, and the second annular side wall is provided with a plurality of air inlet holes;

the second centrifugal filter assembly comprises a second flat plate and an air deflector, and the air deflector is arranged on the second flat plate;

the second annular side wall is connected with the second flat plate to form a wind guide chamber; an air passing gap is reserved between the first annular side wall and the second flat plate, and the air guide plates are located between the first annular side wall and the second annular side wall and form cyclone for air flow entering the air guide chamber through the air inlet holes.

Further, the middle position of the second flat plate is recessed towards the first direction to form a recessed part;

the first annular side wall extends into the depressed part, wherein the air passing gap is reserved between the first annular side wall and the bottom wall of the depressed part.

Further, the first annular side wall is vertically arranged, and the side wall of the concave part is vertically arranged.

Further, the first annular side wall is vertically arranged, and the side wall of the concave part shrinks along the direction towards the bottom wall to form a shrinking type inner cavity.

Furthermore, a first conical body is arranged on the bottom wall of the recessed portion towards a second direction, the second direction is a vertical upward direction, and two extending portions horizontally extend from the bottom wall of the recessed portion and are fixedly connected with the first conical body;

wherein the first taper tapers in cross-sectional area in the second direction, the first taper extending into the first annular sidewall; the second direction is opposite to the first direction.

Further, a second taper is arranged in the first annular side wall along the first direction;

wherein the second taper tapers in cross-sectional area towards the first direction; the second cone is secured within the first annular sidewall by a support structure.

Furthermore, the air deflector is arc-shaped, and a plurality of air deflectors are arranged around the first annular side wall;

the lower end face, facing the second flat plate, of the first flat plate is provided with a plurality of first grooves, the shapes, the number and the positions of the first grooves are matched with the air guide plate, and the air guide plate is embedded into the first grooves and connected with the first flat plate.

Furthermore, a plurality of buckles are arranged on the outer side wall of the second annular plate, the same number of clamping grooves are convexly arranged on the periphery of the second plate, and the sizes and the positions of the buckles are matched with the clamping grooves.

Further, the lateral wall of second annular lateral wall is close to one side of first flat board is provided with connecting portion, the connecting portion surface is the arcuation, connecting portion are used for being connected with the counterpoint portion of sweeping the floor machine's dirt box looks adaptation.

The sweeper according to the second aspect of the invention comprises a dust box and the centrifugal filter device of the first aspect of the invention described above.

According to the embodiment of the invention, the centrifugal filter device has at least the following technical effects: the air current that contains the dust flows to centrifugal filter, form the first order by a plurality of fresh air inlets in the first centrifugal filter subassembly outside and filter the back, reentrant centrifugal filter's inside, through a plurality of aviation baffles on the second centrifugal filter subassembly, the cooperation of air gap with the wind-guiding cavity, the rotatory centrifugation phenomenon that takes place of air current that contains the dust and then collected by centrifugal filtration, form the second grade and filter, after twice filtering, the content of dust granule in the air current has been improved, the problem that the dust probably blocks the wind channel filter screen or gets into the fan has been solved effectively.

Drawings

FIG. 1 is a cross-sectional view of a centrifugal filter device according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a centrifugal filter device according to another embodiment of the present invention.

Fig. 3 is an exploded view of a centrifugal filter device according to an embodiment of the present invention.

FIG. 4 is a block diagram of a first centrifugal filter assembly according to one embodiment of the invention.

FIG. 5 is a block diagram of a second centrifugal filter assembly according to one embodiment of the invention.

The centrifugal filter comprises a first centrifugal filter component 100, a first annular side wall 110, a second annular side wall 120, a first groove 130, a buckle 140, a connecting part 150, a second centrifugal filter component 200, a concave part 210, an air deflector 220, a clamping groove 230, a first conical body 300, a second conical body 400 and a filter screen 500;

the implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

An embodiment of the present invention provides a centrifugal filter device, including: the first centrifugal filter assembly 100 comprises a first flat plate, the first flat plate is provided with a first opening, the first opening is used for communicating the filter screen 500, a first annular side wall 110 is arranged along a first direction corresponding to the first opening, the first direction is a vertical downward direction, a second annular side wall 120 is formed on the outer side of the first flat plate along the first direction, and a plurality of air inlet holes are formed in the second annular side wall 120; a first centrifugal filter assembly 200, the first centrifugal filter assembly 200 comprising a second plate and an air deflector 220, the air deflector 220 being mounted on the second plate; wherein, the second annular sidewall 120 is connected with the second plate to form a wind guide chamber; an air passing gap is reserved between the first annular side wall 110 and the second flat plate, and a plurality of air guide plates 220 are positioned between the first annular side wall 110 and the second annular side wall 120, so that air flow entering the air guide chamber through the air inlet holes forms cyclone.

Referring to fig. 1, 2 and 3, in particular, the first plate in this embodiment has a circular shape, and a first opening is formed at a central portion of the first plate concentrically with the first plate, and the first opening forms a first annular sidewall 110 protruding along a first direction, the first direction is vertical downward, and the first annular sidewall 110 is a cavity structure. A second annular sidewall 120 is formed at the outermost side of the first plate downward in the same direction as the first annular sidewall 110, and the thickness of the second annular sidewall 120 is set as predetermined. A plurality of air inlet holes are laid on the second annular side wall 120, the air inlet holes all penetrate through the second annular side wall 120, and the air inlet holes are circular. In other embodiments of the present invention, the shape of the air inlet openings can be rectangular, triangular, square, etc. The air inlet holes are parallelly laid on the side wall of the second protrusion, and a spacing distance is reserved between every two air inlet holes. The second plate of the second filter assembly is configured in a circular shape, and the shape of the second plate is the same as the shape of the first plate. A plurality of air deflectors 220 are disposed on the second plate, and the air deflectors 220 are installed between the first annular sidewall 110 and the second annular sidewall 120. The air deflector 220 forms an air guiding chamber between the second annular sidewall 120 and the second plate, an air passing gap is left between the first annular sidewall 110 and the second plate, and when air flows enter the air guiding chamber through the air inlet holes, the air flows form a cyclone. The first filter assembly is disposed above the second filter assembly, and when dust-containing wind blows toward the centrifugal filter device, the dust-containing wind enters the interior of the centrifugal filter device through the plurality of wind inlet holes in the second annular sidewall 120, and due to the wind guide plate 220, the wind entering from the wind inlet holes forms a cyclone through the wind guide plate 220, and the generated cyclone rotates in the wind guide chamber and enters the air passing gap formed between the first annular sidewall 110 and the second plate. Because the wind containing dust is changed into cyclone, and the wind rotates at high speed in the gap between the wind guide chamber and the air passing gap, when the force applied on the dust is not enough to provide the centripetal force required by the circular motion, the centrifugal force of the dust is larger than that applied on the dust, the dust can move away from the circle center, the centrifugal phenomenon is generated in the gap between the wind guide chamber and the air passing gap, the dust in the cyclone can be separated from the cyclone due to the centrifugal phenomenon, and the problem that the dust can block a filter screen of an air channel or enter a fan is effectively solved.

In one embodiment of the present invention, the middle position of the second plate is recessed toward the first direction to form a recess 210; the first annular sidewall 110 extends into the recess 210, wherein the air passing gap is left between the first annular sidewall 110 and the sidewall and the bottom wall of the recess 210.

Referring to fig. 1 and 2, dust is blown into the centrifugal filter device to form a cyclone, and the cyclone rotates at a high speed in a flow direction in the air guide chamber and the air passing gap, when the force applied to the dust is not enough to provide a centripetal force required by circular motion, the centrifugal force of the dust is greater than the centripetal force applied to the dust, the dust can move away from the center of a circle, a centrifugal phenomenon is generated in the air guide chamber and the air passing gap, the dust in the cyclone can be separated from the cyclone due to the centrifugal phenomenon, and part of the dust collides with the side wall of the recess 210 and then falls to the bottom wall of the recess 210, so that the dust stops at the bottom wall of the recess 210, and the possibility of dust particles entering a fan is effectively reduced.

In one embodiment of the present invention, the first annular sidewall 110 is vertically disposed and the sidewall of the recess 210 is vertically disposed.

Referring to fig. 1, specifically, the sidewalls of the first annular sidewall 110 and the recess 210 may be designed to be vertical from top to bottom, and the vertical length of the first annular sidewall 110 is less from the bottom of the recess 210, at this time, the height difference formed between the second flat plate and the lower end surface of the first annular sidewall 110 will be larger, and thus the length of the air gap formed between the first annular sidewall 110 and the sidewall of the recess 210 is also longer. Similarly, when wind containing dust blows towards the centrifugal filter device, the plurality of air deflectors 220 generate cyclone, the cyclone continuously rotates in the air passing gap to generate a centrifugal phenomenon, the longer air passing gap enables the cyclone to rotate in the air passing gap for a longer time to generate a longer centrifugal phenomenon, and more dust is separated from the wind by the centrifugal phenomenon and collides with the first annular side wall 110 to fall. Through the vertical setting first annular lateral wall 110 and the lateral wall of depressed part 210 can let the difference in height increase between the lower terminal surface of second flat plate and first annular lateral wall 110, let the dust can last centrifugal motion for a longer time in hollow channel, and then more dust centrifugation drops and then is collected, the efficiency of the centrifugal collection dust of improvement.

In one embodiment of the present invention, the first annular sidewall 110 is vertically disposed, and the sidewall of the recess 210 is shrunk in a direction toward the bottom wall to form a shrink-type inner cavity.

Referring to fig. 2, specifically, the sidewall of the recess 210 is designed to be contracted toward the bottom wall to form an arc-shaped curved sidewall, and the first annular sidewall 110 is designed to be vertical from top to bottom and collides with the sidewall of the recess 210 to fall off when the dust generates a centrifugal phenomenon, and the arc-shaped sidewall is designed to allow the dust to fall off to the bottom wall of the recess 210 along the curved direction of the sidewall of the recess 210 when the dust falls off, so that more dust is concentrated on the bottom wall of the recess 210, and the dust is collected more effectively. In another embodiment of the invention, the side wall of the recess is tapered in a direction toward the bottom wall to form an inner cavity of an inclined shape.

In an embodiment of the present invention, the bottom wall of the recessed portion 210 of the second annular sidewall 120 is provided with a first conical body 300 facing a second direction, the second direction is a vertical upward direction, and the bottom wall of the recessed portion 210 of the second annular sidewall 120 horizontally extends to form two extending portions fixedly connected with the first conical body 300 of the second annular sidewall 120; wherein the cross-sectional area of the first conical body 300 of the second annular sidewall 120 in the second direction decreases gradually towards the second annular sidewall 120, and the first conical body 300 of the second annular sidewall 120 protrudes into the first annular sidewall 110 of the second annular sidewall 120; the second annular sidewall 120 second direction is opposite the second annular sidewall 120 first direction.

Referring to fig. 1, in particular, the bottom wall of the recess 210 of the second annular side wall 120 is provided with a first taper 300 toward a second direction, the first direction and the second direction being opposite, the second direction being vertically upward. The shape of the first conical body 300 is similar to the shape of a conical body, the surface of the first conical body 300 is smooth, one end of the first conical body 300 with a large area is the end close to the bottom wall of the recess 210, the first conical body 300 is vertically arranged and coaxial with the first annular side wall 110, the left end and the right end of the bottom wall of the recess 210 extend inwards to form two horizontal plates respectively, and the horizontal plates are connected with the first annular side wall 110 to fix the first conical body 300. When the wind containing dust swirls through the wind deflector 220, some dust is centrifugally dropped and collected through the hollow channel, but some dust is not completely collected, and the wind containing dust enters the bottom wall of the recess 210 through the air gap, and flows from the bottom wall of the recess 210 to the top of the first annular sidewall 110. The first cone 300 is vertically arranged on the top of the first annular sidewall 110, and collides with the first cone 300 when the wind containing dust flows to the top of the first annular sidewall 110, because the first cone 300 has a cone shape, the upper and lower ends are inclined and the surface of the cone surface is smooth; moreover, the end of the first conical body 300 with a large area is close to the top end of the first annular sidewall 110, and the end with a large area is closer to the first annular sidewall 110, so that more dust is blocked from leaving the centrifugal filter device from the opening of the first annular sidewall 110. The dust falling from the first cone 300 contacting the first cone 300 falls to the bottom, so that the dust falls and concentrates in a specific area, thereby improving the efficiency of collecting and cleaning.

In one embodiment of the present invention, a second taper 400 is disposed in the first annular sidewall 110 along the first direction; wherein the cross-sectional area of the second cone 400 decreases gradually towards the first direction; the second cone 400 is secured within the first annular sidewall 110 by a support structure.

Referring to fig. 2, in particular, a second taper 400 is disposed in the first annular sidewall 110 along a first direction, which is vertically downward. The second cone 400 is a cone, and the surface of the second cone 400 is smooth. The end of the second cone 400 with a large area is designed at the end close to the first opening, the other end faces the first direction, the second cone 400 is vertically arranged coaxially with the first annular side wall 110, two horizontal plates extend inwards from the left end and the right end of the first annular side wall 110 respectively, and the horizontal plates are connected and fixed with the second cone 400. When the wind containing dust swirls through the wind guide plate 220, some dust is centrifugally dropped and collected through the wind guide chamber, but some dust is not completely collected, the wind containing dust enters the bottom of the recess 210 through the wind guide chamber, and the wind containing dust flows from the bottom of the recess 210 to the top of the first protrusion. The second cone 400 having a tapered shape is vertically designed and has a cross-sectional area decreasing from top to bottom, and when the wind containing dust collides with the second cone 400 while flowing to the top of the first protrusion, the dust contacting the second cone 400 falls to the bottom of the recess 210, and further, more dust is collected without being separated in the first passage, thereby improving the efficiency of collecting and cleaning.

In an embodiment of the present invention, the material of the air deflector 220 may be made of a composite material, and a ceramic matrix composite material, a polymer matrix composite material, or the like may be used as the material of the air deflector 220. When wind blows the centrifugal filter device, dust-containing wind enters the centrifugal filter device from the air inlet hole and contacts with the air deflector 220, and the dust-containing wind may contain hard objects such as stone particles with high hardness and the like, and can continuously impact the air deflector 220 under the driving of high-speed rotating wind, even damage the air deflector 220. The air deflector 220 made of high-density composite material has very high fatigue, impact and fracture toughness due to its characteristics, and can resist the impact of hard objects such as stone particles. Moreover, the composite material is light and much smaller than the metal material with the same volume, and the air deflector 220 made of the composite material enables the centrifugal filter device to have smaller mass.

In one embodiment of the present invention, the air deflector 220 is arc-shaped, and the plurality of air deflectors 220 are disposed around the first annular sidewall 110; in an embodiment of the present invention, a plurality of first grooves 130 are disposed on a lower end surface of the first plate facing the second plate, the number and the positions of the first grooves 130 are matched with those of the air guiding plate 220, and the air guiding plate 220 is embedded in the first grooves 130 and connected with the first plate.

Referring to fig. 4 and 5, the air guide plates 220 are designed to be arc-shaped and are arranged near the first opening, and the air containing dust enters the centrifugal filter device from the air inlet hole and contacts with the air guide plates 220, because the air guide plates 220 are designed to have a certain curved radian, the flow direction of the air containing dust can be changed, the air can rotate more along the direction of the radian, the rotation of the air is enhanced, further, the wind can generate a centrifugal phenomenon more quickly, the separation of the dust from the air is improved, and the dust collection efficiency is improved. A plurality of first grooves 130 are formed in the lower end face of the first flat plate, and the first grooves 130 are arc-shaped and matched with the air deflector 220 in shape; the number of the first grooves 130 is matched with that of the air deflectors 220; the position of the first groove 130 on the lower end surface of the first plate is matched with the position of the air deflector 220 on the second plate. Air deflection plate 220 can be inserted into first recess 130 for engagement when first centrifugal filter assembly 100 and first centrifugal filter assembly 200 are connected. By arranging the first groove 130 matched with the arc-shaped stripe, the air deflector 220 can be combined with the first groove 130 to fix the air deflector 220, and the air deflector 220 can more stably provide stable cyclone in the operation process of the centrifugal filter device.

In an embodiment of the present invention, a plurality of fasteners 140 are disposed on an outer side wall of the second annular side wall 120, the same number of slots 230 are protruded from an outer periphery of the second flat plate, and sizes and positions of the fasteners 140 are matched with the slots 230.

Referring to fig. 4 and 5, specifically, four buckles 140 are disposed on the outer side wall of the second annular side wall 120, and the area of the buckle 140 close to the second annular side wall 120 is larger than that of the other end, wherein the buckles 140 are disposed on two opposite sides of the circular first flat plate, and the buckles 140 are in the shape of a staircase with inclined sides. And the second flat plate extends outwards to form mounting brackets at the opposite peripheries of the two ends of the second flat plate, and the two extending mounting brackets are arranged oppositely. Each mounting bracket is provided with two clamping grooves 230, and the quantity of the clamping grooves 230 is matched with that of the clamping buckles 140 on the same side; the shape of the card slot 230 is formed to match the shape of the clip 140, and the distance between two adjacent clips 140 is the same as the distance between two adjacent card slots 230. Through setting up buckle 140 at first centrifugal filter assembly 100 respectively, set up draw-in groove 230 at first centrifugal filter assembly 200, can pass the mode of letting first centrifugal filter assembly 100 and first centrifugal filter assembly 200 can cross nimble dismantlement through draw-in groove 230 connection between first centrifugal filter assembly 100 and first centrifugal filter assembly 200, improve the efficiency of dismantling when the centrifugal filter device is inside to be cleaned.

In an embodiment of the present invention, a connecting portion 150 is disposed on a side of an outer side wall of the second annular side wall 120 close to the first plate, a surface of the connecting portion 150 is arc-shaped, and the connecting portion 150 is used for connecting with an opposite portion adapted to a dust box of the sweeper.

Referring to fig. 4 and 5, two connecting portions 150 are further disposed on the outer side wall of the second annular side wall 120, the two connecting portions 150 are oppositely disposed on two sides of the outer side wall of the second annular side wall 120, and an angle formed by the two connecting portions 150 to the center of the second flat plate is about 180 degrees. The surface of the connecting portion 150 is mostly arc-shaped. Because the surface of the connecting part 150 is designed to be smooth arc, when the centrifugal filter device is connected with the dust box, the whole centrifugal filter device can be connected with the opposite position part of the dust box of the sweeper in a rotating mode, and the connection and disassembly efficiency of the centrifugal filter device and the dust box of the sweeper can be improved.

In one embodiment of the present invention, the screen 500 being disposed at the upper end of the first plate, the screen 500 having an area larger than that of the first opening to cover the first opening.

Referring to fig. 1, 2 and 3, in particular, the screen 500 has a circular shape with an area larger than that of the first opening. The filter screen 500 that sets up in first annular lateral wall 110 upper end also can play filterable effect, blow to centrifugal filter device and enter into the upper end that the wind-guiding chamber flowed to first annular lateral wall 110 again from the fresh air inlet at the wind that contains the dirt ash, and filter screen 500 of first annular lateral wall 110 upper end also can filter the dirt ash that has not filtered out from the wind yet and adsorb, it does not let the dirt ash leave centrifugal filter device along with wind to block more dirt ash, improve centrifugal filter device's filter capacity, let less dirt ash enter into the fan.

The sweeper according to the second aspect of the invention comprises a dust box and the centrifugal filter device according to the first aspect of the invention, wherein the centrifugal filter device is installed corresponding to the air outlet of the dust box.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A centrifugal filter device, comprising:

2. The centrifugal filter apparatus of claim 1, wherein the second plate is recessed toward the first direction at an intermediate position to form a recess;

3. The centrifugal filter apparatus of claim 2, wherein the first annular sidewall is vertically disposed and the sidewall of the recess is vertically disposed.

4. The centrifugal filter apparatus of claim 2, wherein the first annular sidewall is vertically disposed, and the sidewall of the recess converges in a direction toward the bottom wall to form a converging cavity.

5. The centrifugal filter device as recited in claim 2, wherein the bottom wall of the recess is provided with a first conical body facing a second direction, the second direction is a vertical upward direction, and the bottom wall of the recess extends horizontally with two extending portions fixedly connected with the first conical body;

6. The centrifugal filter apparatus of claim 1 wherein a second cone is disposed in said first annular sidewall along said first direction;

7. The centrifugal filter apparatus of claim 1 wherein said air deflector is arcuate in shape, and a plurality of said air deflectors are disposed about said first annular sidewall;

8. The centrifugal filter device of claim 1, wherein the outer side wall of the second annular side wall is provided with a plurality of fasteners, the periphery of the second flat plate is provided with a same number of fastening grooves in a protruding manner, and the size and the position of the fasteners are matched with the fastening grooves.

9. The centrifugal filter device of claim 1, wherein a connecting portion is disposed on a side of the outer side wall of the second annular side wall close to the first flat plate, a surface of the connecting portion is arc-shaped, and the connecting portion is used for connecting with a positioning portion adapted to a dust box of a sweeper.

10. A sweeper, characterized by comprising a dust box and a centrifugal filter device according to any one of claims 1 to 10;

the centrifugal filter device is arranged corresponding to the air outlet of the dust box.