CN113198284A - Filter equipment and dust collecting equipment - Google Patents

Abstract

The invention relates to a filtering device and dust collection equipment, belongs to the technical field of household appliances, and aims to solve the problem that the existing dust collection equipment is long in overall length. The filtering apparatus of the present invention comprises: the first filtering component is used for carrying out primary filtering on the fluid entering the filtering device; the second filtering component is positioned at the downstream of the first filtering component and is used for carrying out secondary filtering on the fluid filtered by the first filtering component; wherein the second filter assembly comprises a cyclone cone and a motor assembly cavity; the motor assembling cavity is used for assembling a motor; the cyclone cones are arranged in a plurality of surrounding positions outside the motor assembly cavity for cyclone filtration of fluid entering the second filter assembly. The filter device is provided with the motor assembling cavity for assembling the motor, so that the length of the dust collection equipment can be effectively reduced, and the use body feeling of the dust collection equipment is improved.

Description

Filter equipment and dust collecting equipment

Technical Field

The invention relates to the technical field of household appliances, in particular to a filtering device and dust collection equipment.

Background

At present, among the current dust collecting equipment, motor element is located filter equipment's rear, and this leads to dust collecting equipment whole length longer, is unfavorable for the user operation, reduces dust collecting equipment's use body and feels.

Disclosure of Invention

In view of the foregoing analysis, an embodiment of the present invention is directed to a filtering device and a dust collecting apparatus, so as to solve the problem of a long overall length of the existing dust collecting apparatus.

In one aspect, the present invention provides a filter apparatus comprising:

the first filtering component is used for carrying out primary filtering on the fluid entering the filtering device;

the second filtering component is positioned at the downstream of the first filtering component and is used for carrying out secondary filtering on the fluid filtered by the first filtering component;

wherein the second filter assembly comprises a cyclone cone and a motor assembly cavity;

the motor assembling cavity is used for assembling a motor;

the cyclone cones are arranged in a plurality of surrounding positions outside the motor assembly cavity for cyclone filtration of fluid entering the second filter assembly.

Furthermore, the first filter assembly is provided with a central dust collecting space for storing the dust filtered out by the second filter assembly;

the second filtering component further comprises a dust guide piece, and the dust guide piece is communicated with the middle dust collecting space and the cyclone cone respectively so as to guide the dust filtered by the cyclone cone into the central dust collecting space.

Further, the first filter assembly comprises a fluid pipeline, a filter part, a flow guide part and a dust collecting annular wall;

the fluid pipeline is provided with a fluid inlet and a fluid outlet, and at least one part of the fluid pipeline is enclosed inside the side wall of the first filtering component;

the filter part is arranged around the outer side of the fluid pipeline and forms a part of the side wall of the first filter assembly;

one end of the flow guide part is connected with the fluid outlet, and the other end of the flow guide part faces the filtering part so as to guide the fluid in the fluid pipeline to the filtering part;

the dust collecting annular wall is positioned between the fluid pipeline and the side wall of the first filtering component, the bottom end of the dust collecting annular wall is connected with the bottom plate of the first filtering component, and gaps are formed between the dust collecting annular wall and the fluid pipeline as well as between the dust collecting annular wall and the side wall of the first filtering component;

the central dust collecting space is enclosed among the dust collecting annular wall, the fluid pipeline and the bottom plate of the first filtering component;

and a circulation space is defined among the dust collecting annular wall, the bottom plate of the first filtering component and the first filtering component so as to allow the fluid after primary filtering to circulate.

Further, the flow guide part extends spirally from the fluid outlet to the filter part.

Further, the water conservancy diversion portion includes diaphragm and spiral plate, and the diaphragm is located the top of fluid outlet, the spiral plate is connected with the diaphragm, and the spiral direction orientation of spiral plate the filter house.

Furthermore, the flow guide part also comprises a baffle plate, one end of the baffle plate is vertically connected with the transverse plate, the other end of the baffle plate is connected with the spiral plate, and the inner side of the baffle plate is connected with the side wall of the first filtering component.

Further, the dust guide piece is positioned below the motor assembling cavity and the cyclone cone;

the bottom of the dust guide part is in butt joint with the top of the side wall of the first filter assembly.

Furthermore, the bottom of the dust guide piece is provided with a gas guide port and a dust collection port, the gas guide port is communicated with the circulation space, and the dust collection port is communicated with the central dust collection space.

Furthermore, lead the dirt spare and include toper rampart and bottom, the bottom is connected with toper rampart bottom, and the bottom is seted up lead gas port and dust collection mouth.

Further, the bottom cover comprises a cover plate part, and the cover plate part is covered on the top end of the fluid pipeline;

the bottom end of the conical annular wall is matched with the top of the dust collecting annular wall in shape, one part of the bottom end of the conical annular wall is connected with the upper end face of the cover plate part, and the rest part of the bottom end of the conical annular wall is butted with the dust collecting annular wall;

the bottom end of the conical annular wall and the cover plate part enclose the dust collecting opening;

the air guide port is positioned on the outer side of the conical annular wall.

Furthermore, a plurality of supporting bars are arranged in the air guide port, one ends of the supporting bars are connected with the conical annular wall, and the other ends of the supporting bars are connected with the side wall of the bottom cover;

and a supporting plate is arranged between the top end surface of the bottom cover and the conical annular wall.

Further, the conical annular wall is gradually inclined outwards from bottom to top.

Furthermore, the outer edge of the top end of the conical annular wall is arranged at the outer side of the bottom of the cyclone cone and the motor assembling cavity in a surrounding mode.

Furthermore, the cyclone cone is provided with an air inlet, an air outlet and a dust guide port;

the dust guide port is positioned at the lowest point of the cyclone cone, and the conical annular wall is arranged around the outer side of the dust guide port;

the air inlet is formed in the side wall of the cyclone cone;

the air outlet is formed in the top end of the cyclone cone.

Furthermore, a connecting plate is arranged between every two adjacent cyclone cones and extends from the top end of the side wall of each cyclone cone to the bottom end of the side wall of each cyclone cone;

the air inlet is positioned on the outer side of the connecting plate;

the top of the conical ring wall is hermetically butted with the connecting plate and the bottom of the cyclone cone, and the conical ring wall is arranged outside the dust guide opening in a surrounding mode.

Furthermore, the second filter assembly also comprises a cover body which is covered on the top of the motor assembly cavity, the cyclone cone and the connecting plate;

the lid is equipped with air guide district, air inlet district and air-out district, and the air-out district encloses the outside of locating the air inlet district, and the air guide district encloses the outside of locating the air-out district, and the air guide district with whirlwind awl, connecting plate are corresponding, air inlet district and air-out district with the motor assembly chamber is corresponding.

Furthermore, the air guide area is provided with air guide ports, the air guide ports correspond to the cyclone cones one by one, and the air guide ports are communicated with the air outlet;

the air inlet area is provided with an air inlet communicated with the motor assembly cavity;

the air outlet area is provided with an air outlet communicated with the motor assembly cavity.

Furthermore, a partition plate is arranged at the top end of the side wall of the first filtering assembly, the partition plate surrounds the outer side of the side wall of the first filtering assembly, and the partition plate is located above the flow guide portion.

In another aspect, the invention provides a dust collecting device comprising the filter device.

Furthermore, the dust collection equipment also comprises a dust collection cup, and the filter device is detachably arranged in the dust collection cup;

the partition plate of the first filter assembly and the cover body of the second filter assembly are in sealing contact with the side wall of the dust collecting cup.

Compared with the prior art, the invention can realize at least one of the following beneficial effects:

(1) the filtering device is provided with a motor assembling cavity for assembling the motor, so that the length of the dust collection equipment can be effectively reduced, and the use body feeling of the dust collection equipment is improved;

(2) the cyclone cone arranged around the outer side of the motor assembly cavity can effectively reduce noise and vibration generated by high-speed rotation of the motor, and has good noise reduction and vibration reduction effects;

(3) the filtering device comprises a first filtering component and a second filtering component, and the dust-containing fluid entering the filtering device is filtered twice to realize classified filtering, so that the filtering device has a good filtering effect;

(4) the guide part of the first filter assembly extends to the filter part from the fluid outlet in a spiral mode so as to guide the fluid in the fluid pipeline to the filter part in a cyclone mode, and on one hand, the guide part guides the fluid entering the first filter assembly so that the fluid can be quickly guided to the filter part; on the other hand, the guide part enables the fluid to form cyclone outside the first filtering component, so that dust with larger particles in the fluid is separated out under the centrifugal action, the filtering pressure of the filtering part is reduced, and the filtering part has a better filtering effect.

In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic diagram of a filter apparatus according to an embodiment;

FIG. 2 is an exploded view of a filter assembly according to an embodiment;

FIG. 3 is a cross-sectional view of a filter assembly according to an embodiment;

FIG. 4 is a schematic diagram of a first filter assembly according to an embodiment;

FIG. 5 is a schematic view of another angle of the first filter assembly in accordance with an embodiment;

FIG. 6 is a schematic view of a combined structure of a first filter assembly and a dust guide in an embodiment;

FIG. 7 is a schematic view of a first filter assembly and a dust guide at another angle in combination according to an embodiment;

FIG. 8 is a schematic structural diagram of a dust guide member according to an embodiment;

FIG. 9 is a schematic structural view of a dust guide member according to an embodiment (II);

FIG. 10 is a schematic structural view (III) of a dust guide in an embodiment;

FIG. 11 is a schematic structural view (IV) of a dust guide in an embodiment;

FIG. 12 is a schematic diagram of a second filter assembly according to an embodiment;

FIG. 13 is a schematic view of another angle of the second filter assembly according to an embodiment;

FIG. 14 is a cross-sectional view of a second filter assembly in an embodiment;

FIG. 15 is a schematic view of an embodiment of a second filter assembly with a dust guide removed;

FIG. 16 is a schematic view of a second filter assembly according to an embodiment with the cover removed;

FIG. 17 is a schematic view of a cover according to an embodiment;

FIG. 18 is a schematic view of another angle of the cover according to an embodiment;

FIG. 19 is a schematic view of a dust collector according to an embodiment;

FIG. 20 is a schematic view of a filter assembly and dirt cup assembly according to an embodiment;

FIG. 21 is a schematic view of another angle of the filter assembly and dirt cup assembly according to an embodiment;

figure 22 is a sectional view of a filter assembly and dirt cup assembly according to an embodiment.

Reference numerals:

1-a first filter assembly; 101-a fluid inlet; 102-a fluid outlet; 11-a fluid conduit; 111-straight-flow pipe; 112-a cyclone tube; 112 a-central part; 112 b-arc; 12-a filtration section; 121-dust board; 13-a flow guide part; 131-a transverse plate; 132-a spiral plate; 133-a baffle; 14-a base plate; 15-dust collecting ring wall; 16-a separator; 17-a rib plate; 2-a second filter assembly; 201-gas guide port; 202-dust collecting port; 203-air inlet; 204-gas outlet; 205-dust guide port; 206-air guide port; 207-air inlet; 208-an air outlet; 21-a motor assembly chamber; 22-cyclone cone; 221-a cyclone part; 222-a cone portion; 23-a dust guide; 231-conical ring wall; 232-bottom cover; 232 a-cover plate portion; 232 b-support bar; 232 c-support plate; 24-a connecting plate; 25-a cover body; 251-a wind guiding zone; 252-an air intake zone; 253-air outlet area; 254-an air duct; 26-a guide; 261-a lower plate; 262-side plate; 3-a dust collecting cup; 301-dust suction opening.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention and not to limit its scope.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.

The general working surface of the invention can be a plane or a curved surface, can be inclined or horizontal. For convenience of explanation, the embodiments of the present invention are placed on a horizontal plane and used on the horizontal plane, and are defined as "high and low" and "up and down".

Example one

The present embodiment provides a filter device, as shown in fig. 1 to 18, including:

a first filtering component 1 for performing primary filtering on the fluid entering the filtering device;

the second filter assembly 2 is positioned at the downstream of the first filter assembly 1 and is used for carrying out secondary filtration on the fluid filtered by the first filter assembly 1;

wherein, the second filter assembly 2 comprises a cyclone cone 21 and a motor assembling cavity 21;

the motor assembling cavity 21 is used for assembling a motor;

the plurality of the cyclone cones 22 are provided, and the cyclone cones 22 are arranged around the outside of the motor assembling chamber 21 for performing cyclone filtration on the fluid entering the second filter assembly 2.

Compared with the prior art, the filter device is provided with the motor assembly cavity 22 for assembling the motor, so that the length of equipment (such as dust collection equipment) provided with the filter device can be effectively reduced, and the use body feeling of the equipment is improved; secondly, the cyclone cone arranged around the outer side of the motor assembly cavity 22 can effectively reduce noise and vibration generated by high-speed rotation of the motor, and has good noise reduction and vibration reduction effects; finally, the first filtering component 1 and the second filtering component 2 are arranged to filter the dusty fluid entering the first filtering component for two times, namely, the first filtering component 1 filters the dusty fluid for one time and the second filtering component 2 filters the dusty fluid (the fluid after the first filtering) for two times (namely, cyclone filtering), so that classified filtering is realized, and the filtering device has a good filtering effect.

The first filter assembly 1 comprises a fluid conduit 11, a filter portion 12 and a flow guide portion 13.

The fluid conduit 11 is provided with a fluid inlet 101 and a fluid outlet 102, the dust laden fluid entering the first filter assembly 1 (filter device) through the fluid inlet 101.

The filter portion 12 is ready to filter the fluid entering the first filter assembly 1. In particular, the filter house 12 is enclosed outside the fluid duct 11, and the filter house 12 constitutes a part of the side wall of the first filter assembly 1.

At least a part of the fluid pipeline 11 is enclosed inside the sidewall of the first filtering component 1, and a gap is reserved between the sidewall of the fluid pipeline 11 and the sidewall of the first filtering component 1, so that the fluid filtered by the filtering part 12 can flow through the gap.

One end of the flow guide 13 is connected to the fluid outlet 102, and the other end of the flow guide 13 faces the filter 12 to guide the fluid in the fluid pipe 11 to the filter 12. Specifically, the fluid outlet 102 is opened on the side wall of the first filter assembly 1, and the flow guide portion 13 is located on the outer side surface of the side wall of the first filter assembly 1 (the side surface far away from the central axis of the first filter assembly 1).

Further, a flow guide portion 13 extends spirally from the fluid outlet 102 to the filtering portion 12 to guide the fluid in the fluid pipeline 11 to the filtering portion 12 in a cyclone manner, on one hand, the flow guide portion 13 guides the fluid entering the first filtering assembly 1 to be quickly guided to the filtering portion 12; on the other hand, the guide part 13 makes the fluid form cyclone outside the first filter assembly 1, so that the dust with larger particles in the fluid is separated out under the centrifugal action, the filtering pressure of the filter part 12 is reduced, and the filter part 12 has better filtering effect.

In order to ensure the filtering effect of the filtering part 12, the fluid outlet 102 and the flow guide part 13 are positioned above the filtering part 12, so that the fluid can be filtered by the whole filtering part 12 as far as possible, and the filtering effect of the filtering part 12 is fully exerted.

Specifically, the flow guiding portion 13 includes a horizontal plate 131 and a spiral plate 132, the horizontal plate 131 is located above the fluid outlet 102, the spiral plate 132 is connected to the horizontal plate 131, and the spiral direction of the spiral plate 132 faces the filtering portion 12, so as to guide the fluid to the filtering portion 12 for primary filtering and dust removal.

In this embodiment, the spiral plate 132 includes a connecting end and an extending end, the connecting end is connected to the horizontal plate 131, the connecting end extends spirally downward to the extending end, the extending end is located below the fluid outlet 102, and the extending end is located above the filtering portion 12.

It should be noted that the cross plate 131 and the spiral plate 132 are vertically connected to the side wall of the first filter assembly 1 to guide the fluid to the filter portion 12 more quickly and better.

The horizontal plate 131 projects downward to completely cover the fluid outlet 102, that is, the length of the horizontal plate 131 is greater than the length of the fluid outlet 102 (the length of the fluid outlet 102 refers to the longest distance between the left and right ends of the fluid outlet 102), so as to ensure that the fluid guided out from the fluid outlet 102 can be guided by the horizontal plate 131, and in addition, the influence on the outward guiding speed of the fluid caused by the blocking of the fluid outlet 102 by the flow guiding part 13 can be avoided.

In this embodiment, the horizontal plate 131 is disposed along the upper edge of the fluid outlet 102, and the lower end surface of the horizontal plate 131 is flush with the upper end surface of the fluid outlet 102, so as to ensure that the fluid in the fluid outlet 102 is smoothly guided out. The extended end of the spiral plate 132 is connected to the lower edge of the fluid outlet 102, and specifically, the lower end surface of the extended end is flush with the lower end surface of the fluid outlet 102.

In order to better enable the fluid flowing out of the fluid outlet 102 to flow to the filter part 12 along the flow guiding part 13, the flow guiding part 13 further comprises a baffle plate 133 at one end of the fluid outlet 102 connected with the extending end of the spiral plate 132, and the baffle plate 133 is connected with the transverse plate 131, the spiral plate 132 and the side wall of the first filter assembly 1. Specifically, the upper end of the baffle 133 is vertically connected with the lower end face of the transverse plate 131, the lower end of the baffle 133 is vertically connected with the upper end face of the spiral plate 132, the inner end face of the baffle 133 is vertically connected with one end of the fluid outlet 102 close to the extending end of the spiral plate 132, so that the fluid can only be guided to the filtering portion 12 along the transverse plate 131 after being guided out from the fluid outlet 102, and the speed of the fluid to be guided to the filtering portion 12 is increased, thereby increasing the filtering speed of the filtering portion 12, and meanwhile, the fluid is prevented from being reversely guided from the other end, turbulence is caused to occur in the fluid, and the filtering effect and the filtering speed of the first filtering assembly 1 are influenced.

In order to guide the fluid to the filtering part 12 as soon as possible, the spiral angle alpha of the guiding part 13 is less than 360 degrees, and simultaneously, in order to ensure that the fluid can form cyclone in the guiding part 13, the angle alpha is less than or equal to 180 degrees, so the angle alpha is less than or equal to 180 degrees. In this embodiment, α refers to the helix angle between the connection end and the extension end of the spiral plate 132.

In order to ensure that the fluid is better guided at the flow guiding part 13 and forms a cyclone, the fluid duct 11 includes a straight flow tube 111 and a cyclone tube 112, one end of the straight flow tube 111 is provided with a fluid inlet 101, and the other end of the straight flow tube 111 is connected with the cyclone tube 112 in a sealed and through manner, so that the fluid entering the straight flow tube 111 is completely guided into the cyclone tube 112.

The cyclone tube 112 includes a central portion 112a and an arc portion 112b, the bottom of the central portion 112a is communicated with the straight flow tube 111, the sidewall of the central portion 112a is provided with an opening, one end of the arc portion 112b is communicated with the central portion 112a through the opening, the other end of the arc portion 112b is provided with the fluid outlet 102, that is, one end of the arc portion 112b is connected with the central portion 112a, the other end is connected with the sidewall of the first filter assembly 1, and the connection with the central portion 112a is opened with an opening, and the connection with the first filter assembly 1 is opened with the fluid outlet 102. In this embodiment, the opening in the sidewall of the central portion 112a extends from a top end to a bottom end of the sidewall.

The arc-shaped part 112b is provided with an arc-shaped channel therein, so that the fluid is guided to form a cyclone, and the fluid is guided to the fluid outlet 102 and then is better guided along the guide part 13.

It should be noted that the arc of the arc part 112b faces the flow guide part 13, that is, the arc direction of the arc passage of the arc part 112b is consistent with the spiral direction of the spiral plate 132, so that the fluid is guided to the filtering part 12 from the flow guide part 13 more quickly, and at the same time, the fluid is more likely to form a cyclone.

Further, the arc-shaped transition of the side wall of the central portion 112a to the outer side wall of the arc-shaped portion 112b (the side wall far from the central axis of the central portion 112 a), and the arc-shaped transition of the inner side wall of the arc-shaped portion 112b (the side wall near the central axis of the central portion 112 a) to the side wall of the first filter assembly 1, makes the opening of the fluid outlet 102 as large as possible, so that the fluid can be guided to the flow guiding portion 13 more quickly, and furthermore, the two arc-shaped transitions make the fluid guiding smoother and the cyclone formation easier.

It should be noted that the bottom wall of the arc-shaped portion 112b is hermetically connected to the side wall of the central portion 112a, and the inner and outer side walls of the arc-shaped portion 112b are hermetically connected to the side wall of the central portion 112a, respectively, so as to ensure that the fluid in the central portion 112a can completely enter the arc-shaped channel of the arc-shaped portion 112 b. In the present embodiment, the lower end surface of the bottom wall of the arc-shaped portion 112b is flush with the bottom end surface of the side wall of the central portion 112a, and the opening extends from the top to the bottom of the side wall of the central portion 112a to ensure that the fluid in the central portion 112a enters the arc-shaped portion 112b quickly and smoothly.

After entering the first filter assembly 1 from the fluid inlet 101, the dusty fluid is guided by the straight flow tube 111, the central portion 112a and the arc portion 112b of the cyclone tube 112, and then guided to the guide portion 13 from the fluid outlet 102, and guided by the horizontal plate 131 and the spiral plate 132 of the guide portion 13, and then guided to the filter portion 12 for primary filtration.

In this embodiment, the straight flow pipe 111 is a cylindrical pipe, the upper end of the straight flow pipe is located inside the sidewall of the first filter assembly 1, the lower end of the straight flow pipe is located below the sidewall of the first filter assembly 1, the fluid inlet 101 is opened at the lower end of the straight flow pipe 111, and the upper end of the straight flow pipe 111 is hermetically connected with the central portion 112a of the cyclone pipe 112. The central axis of the straight pipe 111 is collinear with the central axis of the first filter assembly 1.

In this embodiment, the cyclone tube 112 is surrounded by the sidewall of the first filter assembly 1, the central portion 112a of the cyclone tube 112 is cylindrical, the diameter of the central portion 112a is the same as that of the straight-flow tube 111, the sidewalls of the cyclone tube and the straight-flow tube are flush, and the central axis of the central portion 112a is collinear with the central axis of the first filter assembly 1. The outer side wall of the arc portion 112b is arc-shaped in transition with the side wall of the central portion 112a, and the inner side wall of the arc portion 112b is arc-shaped in transition with the side wall of the first filter assembly 1.

The first filter assembly 1 further comprises a bottom plate 14, the bottom end of the side wall of the first filter assembly 1 is covered by the bottom plate 14, a through hole for the fluid pipeline 11 to pass through is formed in the center of the bottom plate 14, specifically, the bottom plate 14 is detachably and hermetically connected with the side wall of the first filter assembly 1, and the bottom plate 14 is hermetically connected with the side wall of the fluid conduit 11.

In this embodiment, the straight flow pipe 111 passes through the through hole of the base plate 14 and is connected to the cyclone pipe 112, the sidewall of the straight flow pipe 111 is hermetically connected to the base plate 14, a part of the straight flow pipe 111 is located above the base plate 14, a part of the straight flow pipe is located above the base plate 14, and the fluid inlet 101 is located below the base plate 14.

In this embodiment, the bottom end of the filter part 12 is detachably and hermetically connected to the bottom plate 14, the filter part 12 forms a lower side wall of the first filter assembly 1, and the fluid filtered by the filter part 12 enters a gap between the side wall of the first filter assembly 1 and the fluid pipeline 11.

The first filter assembly 1 further comprises a dust collecting annular wall 15, the dust collecting annular wall 15 is located between the fluid pipeline 11 and the side wall of the first filter assembly 1, that is, the dust collecting annular wall 15 is enclosed outside the straight-through pipe 111 and the central portion 112, the side wall of the first filter assembly 1 is enclosed outside the dust collecting annular wall 15, and gaps are reserved between the dust collecting annular wall 15 and the fluid pipeline 11 and between the dust collecting annular wall 15 and the side wall of the first filter assembly 1.

The bottom end of the dust collecting annular wall 15 is detachably and hermetically connected with the bottom plate 14, and the top end of the dust collecting annular wall 15 is flush with the top end face of the side wall of the first filter assembly 1.

It should be noted that the dust collecting annular wall 15 is provided with a notch for the arc-shaped portion 112b of the cyclone tube 112 to pass through, and the integrated annular wall 15 is hermetically connected with the side wall and the bottom wall of the arc-shaped portion 112 b.

The bottom plate 14, the dust collecting ring wall 15 and the side wall of the fluid conduit 11 are enclosed to form a central dust collecting space in which the dust filtered by the second filter assembly 2 is collected. The bottom of the second filter assembly 2 is butted against the top end of the dust collecting ring wall 15 to guide the dust filtered by the second filter assembly 2 into the central dust collecting space.

A space (called as a flow space) for the fluid filtered by the filter part 12 to flow is defined between the bottom plate 14, the dust collecting annular wall 15 and the side wall of the first filter assembly 1, i.e. the fluid filtered by the first stage of the filter part 12 enters the flow space and is led out from the top of the first filter assembly 1.

In order to ensure that the dust filtered by the first filtering component 1 is not guided to the filtering portion 12, the bottom end of the filtering portion 12 is provided with a dust baffle 121, the dust baffle 121 is surrounded at the bottom end of the filtering portion 12, and the dust baffle 121 is horn-shaped and extends to the bottom end from the top end of the dust baffle 121 outwards and downwards, i.e. the opening direction of the dust baffle 121 faces the direction far away from the filtering portion 12, so as to prevent the dust filtered by the first filtering component from being guided to the filtering portion 12 again.

In order to enable the first-stage filtered dust to have an independent dust storage space in the dust collecting cup, a partition plate 16 is arranged at the top end of the side wall of the first filter assembly 1, the partition plate 16 is arranged around the outer side of the side wall of the first filter assembly 1, and the partition plate 16 is positioned above the flow guide part 13. When the filter device is installed in the dust collecting cup, the fluid inlet 101 of the fluid pipeline is in sealed communication with the dust suction port of the integrated cup, the partition plate 16 is in sealed contact with the side wall of the dust collecting cup, an independent dust storage space is formed among the bottom of the dust collecting cup, the side wall of the first filter component 1, the side wall of the fluid pipeline 1 and the partition plate 16, and dust filtered by the filter part 12 is located in the dust storage space.

It can be seen from the above that the dust filtered by the first filter assembly 1 is stored in the dust storage space, the dust filtered by the second filter assembly 2 is stored in the central dust collecting space, and the two spaces are separated by the dust collecting annular wall 15 and the bottom plate 14 and are independent of each other, so that the dust of different levels can be stored in different areas, and the cleaning by a user is facilitated.

In this embodiment, the partition 16 is in a horn shape, and extends from the bottom end of the partition 16 to the top end in an outward and upward inclined manner, that is, the opening of the partition 16 faces the second filter assembly 2, so as to guide the fluid after the first-stage filtration, and guide the fluid to the second filter assembly 2 as soon as possible.

In order to stabilize the fluid duct 11 and the dust collecting annular wall 15 in the side wall of the first filter assembly 1, a plurality of ribs 17 are disposed between the side wall of the fluid duct 11, the dust collecting annular wall 15 and the side wall of the first filter assembly 1, and in this embodiment, the ribs 17 connected to the fluid duct 11 are located on the side wall of the central portion 112a of the cyclone tube 112.

It should be noted that the number and size of the ribs 17 are arranged such that they do not affect the direction of the primary filtered fluid to the second filter assembly 2 and the direction of the secondary filtered dust from the second filter assembly 2 to the central dust collecting space.

In this embodiment, the side wall of the first filter assembly 1 except the filter part 12 is referred to as an upper side wall, the flow guide part 13 is located on the upper side wall, the fluid outlet 102 is formed on the upper side wall, the rib 17 does not exceed the upper and lower ends of the upper side wall, the length of the central part 112a is the same as that of the upper side wall, and the upper side wall, the flow guide part 13, the cyclone tube 112, the dust collecting ring wall 15, the partition plate 16 and the rib 17 are integrally formed for convenience of processing and assembly and stability of the first filter assembly 1.

In this embodiment, the top end of the filter part 12 is hermetically connected to the bottom end of the upper side wall part, and the bottom end of the filter part 12 is detachably and hermetically connected to the bottom plate 14. Specifically, the filtering portion 12 is a filtering mesh enclosure, the top of the filtering mesh enclosure is hermetically connected with the bottom of the upper side wall portion, and the bottom of the filtering mesh enclosure is detachably and hermetically connected with the bottom plate.

In this embodiment, the bottom end of the dust collecting ring wall 15 is detachably and hermetically connected to the bottom plate 14, so that it is ensured that the dust in the central dust collecting space does not leak from the bottom plate 14, and the dust in the central dust collecting space is conveniently cleaned.

The second filter assembly 2 further comprises a dust guide 23 for guiding the dust secondarily filtered by the cyclone cone 22 into a central dust collecting space surrounded by the dust collecting annular wall 15.

The dust guide part 23 is positioned below the motor assembly cavity 21 and the cyclone cone 22, the bottom of the dust guide part 23 is in butt joint with the top of the side wall of the first filtering component 1, the bottom of the dust guide part 23 is provided with a gas guide opening 201 and a dust collection opening 202, fluid filtered by the first filtering component 1 is guided out from the gas guide opening 201, and dust filtered by the second filtering component of the cyclone cone 22 is guided into the central dust collection space through the dust collection opening 202.

Specifically, the dust guide 23 includes a conical annular wall 231 and a bottom cover 232, the bottom cover 232 is connected to the bottom of the conical annular wall 231, and the air guide opening 201 and the dust collection opening 202 are opened on the bottom cover 232.

The bottom cover 232 further comprises a cover plate portion 232a, the cover plate portion 232a can cover the top end of the fluid conduit 11, so that the fluid entering the fluid conduit 1 is guided out from the fluid outlet 102 on the side wall of the first filter assembly 1, and the shape of the cover plate portion 232a is matched with the top of the fluid conduit 11 to ensure the top end of the fluid conduit 11 is closed. In this embodiment, the cover portion 232a covers the top of the cyclone tube 112, and the shape of the cover portion 232a is matched with the shape of the top of the cyclone tube 112.

One part of the bottom end of the conical annular wall 231 is connected with the upper end surface of the cover plate part 232a, the other part of the bottom end and the cover plate part 232a enclose the dust collection port 202, and the dust collection port 202 is communicated with the central dust collection space. Meanwhile, the bottom end of the conical annular wall 231 is matched with the top shape of the dust collecting annular wall 15, and the other parts of the bottom end of the conical annular wall 231 except the part connected with the cover plate part 232a are butted with the dust collecting annular wall 15, so that the dust after secondary filtration guided by the conical annular wall 231 is completely stored in the central dust collecting space.

The air guide opening 201 is located outside the conical annular wall 231, and the air guide opening 201 is communicated with the above-mentioned flowing space (i.e. the space surrounded by the dust collecting annular wall 15, the side wall of the first filter assembly 1 and the bottom plate 14), and the fluid after the first stage of filtering is completely guided out by the air guide opening 201.

In this embodiment, the bottom end of the side wall of the bottom cover 232 is matched with the top end of the side wall of the first filter element 1, and the bottom end of the side wall of the bottom cover 232 is butted with the top end of the side wall of the first filter element 1.

The outer wall of the cover plate 232a forms a part of the side wall of the bottom cover 232, and the side wall of the bottom cover 232 excluding the cover plate 232a and the tapered annular wall 231 surround the air guide opening 201.

In order to improve the structural stability of the bottom cover 232, a plurality of support bars 232b are provided in the air guide port 201, and one end of each support bar 232b is connected to the tapered circumferential wall 231 and the other end is connected to the side wall of the bottom cover 232. Further, a supporting plate 232c is further disposed between the top end surface of the bottom cover 232 and the conical annular wall 231, and the supporting plate 232c plays a role of triangular support between the bottom cover 232 and the conical annular wall 231, so as to improve the overall stability of the dust guide member 23.

It should be noted that the number and size of the support bars 232b and the support plates 232c are ensured not to affect the flow of the fluid at the air guide port 201.

The conical annular wall 231 extends outwardly from the bottom end to the top end, i.e., it slopes inwardly from the top end to the bottom end, allowing secondary filtered dust to fall more quickly into the central dust collecting space under the guidance of the conical annular wall 231.

In this embodiment, the tapered annular wall 231 is shaped like a trumpet, and the tapered annular wall 231 opens toward the motor mounting cavity 21 and the direction of the cyclone cone 22.

The top outer edge of the conical annular wall 231 is surrounded at the outer sides of the bottom of the cyclone cones 22 and the motor assembling cavity 21, and a dust guiding space for guiding dust after secondary filtration is surrounded at the conical annular wall 231, the bottom of all the cyclone cones 22 and the bottom of the motor assembling cavity 21. Specifically, the top end of the conical annular wall 231 is connected to the bottom end of the cyclone cone 22.

The cyclone cone 22 is provided with an air inlet 203, an air outlet 204 and a dust guide opening 205, the fluid after the primary filtration is guided out from the air guide opening 201 and enters the cyclone cone 22 through the air inlet 203, after the cyclone filtration (i.e. the secondary filtration) of the cyclone cone 22, the fluid after the secondary filtration is guided out of the cyclone cone 22 through the air outlet 204, and the dust filtered out by the secondary filtration is guided into the central dust collecting space through the dust guide opening 205 and the dust guide member 23.

The cyclone cone 22 comprises a cyclone part 221 and a cone part 222, wherein a cyclone cavity is arranged in the cyclone part 221, a conical cavity is arranged in the cone part 222, the cyclone cavity is communicated with the conical cavity, and the conical cavity is inverted (the inverted vertex of the cone is positioned right below the conical bottom surface, and the vertex and the bottom surface have the geometric significance of the cone) and positioned below the cyclone cavity. The cyclone chamber provides a cyclone for the fluid entering it and the cone chamber serves to direct the filtered dust out of the cyclone cone 22 more quickly. In particular, the sidewall of the cyclone chamber is an arcuate sidewall that enables the fluid to form a cyclone.

The air inlet 203 and the air outlet 204 are arranged on the cyclone part 221, and the two are communicated with the cyclone chamber.

The dust guiding opening 205 is opened at the bottom end of the cone portion 222, and the dust guiding opening 205 is communicated with the cone-shaped cavity, i.e. the dust guiding opening 205 is located at the top of the cone-shaped cavity.

It should be noted that the dust guiding opening 205 is located at the lowest point of the cyclone cone 22, and the top of the conical ring wall 231 is surrounded outside all the dust guiding openings 205, so as to ensure that the dust filtered out by the second stage can be completely guided out of the cyclone cone 22 through the dust guiding opening 205, and then stored in the central dust collecting space under the guidance of the dust guiding member 23.

The dust-containing fluid enters the cyclone part 221 from the air inlet 203, cyclone is formed in the cyclone cavity, dust in the fluid after primary filtration falls into the conical cavity along the cavity wall of the cyclone cavity under the centrifugal action of the cyclone and the gravity action of the dust, the dust after secondary filtration is guided out of the cyclone cone 22 through the dust guide opening 205 under the guide of the cavity wall of the conical cavity, and the fluid after secondary filtration is guided out of the cyclone cone 22 through the air outlet 204.

In order to ensure that the fluid does not interfere with each other when entering and exiting the cyclone cone 22 and to enable the fluid to form cyclone in the cyclone cone 22 better, the air inlet 203 is opened on the side wall of the cyclone part 221, and the air outlet 204 is opened on the top of the cyclone part 221.

In this embodiment, the cyclone part 221 is cylindrical, and encloses a cylindrical cyclone chamber, and a central axis of the cyclone part 221 (cyclone chamber) is parallel to a central axis of the second filter assembly. The cone portion 222 is conical, a conical tapered cavity is defined, the top of the cone portion 222 is in butt joint with the bottom of the cyclone portion 221 (namely, no separation exists between the cyclone cavity and the conical cavity), the radius of the bottom surface of the conical cavity is equal to that of the cyclone cavity, and the central axis of the cone portion 222 (the conical cavity) is collinear with the cyclone portion 221. The wall thicknesses of the cyclone part 221 and the cone part 222 are the same, so that the inner cavity wall surface and the outer wall surface of the cyclone cone 22 are smooth, and the filtering effect of the cyclone cone 2 is improved.

The cyclone part 221 is tangent to the outer side surface of the side wall of the motor assembly cavity 21, so that the cyclone part 221 is prevented from occupying the assembly space of the motor and influencing the assembly of the motor.

Each cyclone cone 22 has the same shape, and the air inlet 203 on each cyclone cone is arranged at the same position, so that the cyclone direction and the cyclone speed in each cyclone cone 22 are consistent, and the vibration of the second filtering component caused by different wind directions and wind speeds in each cyclone cone 22 and inconsistent filtering effect are avoided.

Because the air inlet 203 is arranged on the side wall of the cyclone cones 22, a certain distance is kept between the adjacent cyclone cones 22, namely the cyclone cones 22 are arranged alternately, namely the cyclone cones 22 are not contacted with each other, so as to ensure that the air inlet 203 can smoothly enter air.

Be equipped with connecting plate 24 between two adjacent cyclone cones 22, connecting plate 24 extends to the bottom of cyclone cone 2 lateral wall from cyclone cone 22 lateral wall top all the time, and all air inlets 203 are located the outside of connecting plate 24, avoid setting up of connecting plate 24 to influence air inlet 203 and admit air. In this embodiment, the top end surface of the connecting plate 24 is flush with the top end surface of the cyclone cone 22, the bottom end surface of the connecting plate 24 is flush with the bottom end surface of the cyclone cone 22, the end surfaces of the two sides of the connecting plate 24 are respectively connected with the side walls of the adjacent different cyclone cones 22, and the outer wall surface of the connecting plate 24 is flush with the inner end surface of the air inlet 203.

It should be noted that the top of the conical annular wall 231 is in sealing contact with the connecting plate 24 and the bottom of the cyclone cone 22, and the conical annular wall 231 is arranged around the outer side of the dust guiding opening 205 to prevent the dust after the secondary filtration from leaking out, so that the dust is all stored in the central dust collecting space.

So connecting plate 24, two adjacent whirlwind cones 22 and motor assembly chamber 21's outside wall encloses a cavity, be called as separating the chamber with the cavity, make motor assembly chamber 21 outside be separated the chamber completely, whirlwind cone 22, toper rampart 231 wraps up, and whirlwind cone 22 is equipped with whirlwind chamber and toper chamber again, so motor assembly chamber 21 is separated the chamber, the whirlwind chamber, the toper chamber, lead the cladding of dirt space at the center, can effectively reduce vibration and noise that motor during operation produced in motor assembly chamber 21, produce good damping, noise reduction effect.

In order to further improve the noise reduction effect who separates the chamber, separate the intracavity and be filled with the amortization cotton to further reduce the noise that the motor during operation produced, improve second filtering component's noise reduction effect.

The second filter assembly further comprises a cover body 25, and the cover body 25 is covered on the top of the side wall of the second filter assembly, namely the cover body 25 is covered on the top of the motor assembling cavity 21, the cyclone cone 22 and the connecting plate 24.

Specifically, the cover 25 is provided with an air guiding area 251, an air inlet area 252 and an air outlet area 253, the air outlet area 253 is surrounded on the outer side of the air inlet area 252, the air guiding area 251 is surrounded on the outer side of the air outlet area 253, the air guiding area 251 corresponds to the cyclone cone 22 and the connecting plate 24, the air inlet area 252 and the air outlet area 253 correspond to the motor assembly cavity 21, the air guiding area 251 is used for guiding out fluid after secondary filtration, and the air inlet area 252 and the air outlet area 253 are used for enabling the fluid to enter and exit the motor assembly cavity 21, so that fluid interaction between the motor assembly cavity 21 and the outside is achieved.

The wind guiding area 251 is provided with a wind guiding opening 206 to guide the fluid after the secondary filtration out of the cyclone cone 22. In this embodiment, the number of the air guiding holes 206 is the same as that of the cyclone cones 22, the air guiding holes 206 correspond to the cyclone cones 22 one by one, and the air guiding holes 206 are communicated with the air outlet 204, so that the filtered fluid is guided out of the second filter assembly through the air guiding holes 206.

The air inlet area 252 is provided with an air inlet 207 communicated with the motor assembly chamber 21, and fluid enters the motor assembly chamber 21 from the air inlet 207.

The air outlet area 253 is provided with an air outlet 208 communicated with the motor assembly cavity 21, and fluid in the motor assembly cavity 21 is discharged out of the motor assembly cavity 21 through the air outlet 208. A plurality of air outlets 208 are provided, and the air outlets 208 are arranged around the outside of the air inlet 207.

In this embodiment, the air inlet area 252 is located at the center of the cover 25, and the air inlet 207 is located at the center of the cover 25.

In order to introduce fluid into motor mounting cavity 21 more quickly, air inlet region 252 gradually bulges outward from the edge toward the center (i.e., bulges away from motor mounting cavity 21), i.e., air inlet region 252 forms a downward slope from the center to the edge, and specifically air inlet region 252 is shaped like a trumpet that opens toward motor mounting cavity 21. As such, the intake vent 207 is higher (or more outward) than the exhaust vent 208 to allow fluid to be more quickly directed from the intake vent 207 into the motor mounting cavity 21.

In this embodiment, the air outlets 208 are fan-shaped, the arc shape of the air outlets 208 faces the air inlet area 252, the number of the air outlets 208 is 5, and the air outlets 208 are uniformly distributed in the air outlet area 253, so that the total area of the air outlets 208 is large enough, the outward discharge of fluid is not affected, and the stability and strength of the air inlet area 252 can be ensured.

In order to make the cyclone cone 22 have better filtering effect and accelerate the guiding out of the filtered fluid, the cover 25 is provided with an air guide pipe 254, one end of the air guide pipe 254 is in butt joint communication with the air guide opening 206, the other end of the air guide pipe 254 extends into the cyclone cone 22 from the air guide opening 206, and the port located in the cyclone cone 22 is located below the air inlet 203, so as to prevent the fluid after primary filtering from being directly guided out of the cyclone cone 22 without cyclone filtering.

In this embodiment, the air inlet 203 is opened at the top of the sidewall of the cyclone part 221, that is, the top of the sidewall of the cyclone part 221 is opened with the air inlet 203 downward, so that the dust-containing fluid entering the cyclone chamber from the air inlet 203 can be better cyclone-cleaned.

In this embodiment, the length of the air guiding pipe 254 is greater than or equal to 1/3 of the length of the cyclone part 221 and less than or equal to 2/3 of the length of the cyclone part 221, so as to ensure that the fluid after the first-stage filtration can be subjected to the second-stage filtration in the cyclone part 221, and the fluid after the second-stage filtration can be guided to be discharged out of the cyclone cone 22 as soon as possible.

In order to better enable the fluid to form cyclone in the cyclone part 221, a guide part 26 is arranged at the air inlet 203, and the fluid after the primary filtration enters the cyclone part 221 in a tangential manner with the side wall of the cyclone cavity under the guide effect of the guide part 26. Specifically, the guiding portion 26 is provided with an air inlet passage communicated with the air inlet 203, the air inlet passage is tangent to the side wall of the cyclone chamber, and the fluid after primary filtration is guided by the air inlet passage to form cyclone in the cyclone chamber more quickly and easily, so that the filtering effect of the cyclone cone 22 is improved.

In this embodiment, the guiding portion 26 includes a lower plate 261 and a side plate 262, the side plate 262 is tangent to the sidewall of the cyclone portion 221, and the connecting plate 24, the lower plate 261, the side plate 262 and the cover 25 together enclose an air inlet passage tangent to the cyclone chamber. Specifically, hypoplastron 261 sets up and flushes with air inlet 203 bottom along the air inlet bottom, and curb plate 262 sets up and flushes with air inlet 203 outer end along air inlet 203 outer end, and curb plate 262 bottom is connected with hypoplastron 261, and curb plate 262 top and lid 25 butt, the outside and the curb plate 262 of hypoplastron 261 are connected, and the inboard and the connecting plate 24 of hypoplastron 261 are connected.

It should be noted that the central axes of the first filter assembly 1 and the second filter assembly 2 are collinear and are the central axis of the filter device. In this embodiment, the central axes of the fluid conduit 11, the filter part 12, the dust collecting annular wall, the upper side wall part, the dust guiding member 23, the motor assembling cavity 21 and the cover 25 are all collinear with the central axis of the filter device, so that the filter device has a compact and stable overall structure, and is convenient to produce and process.

Example two

The embodiment provides a dust suction device, as shown in fig. 19 to 22, comprising the filter device provided in the first embodiment.

Compared with the prior art, the dust collection equipment provided by the invention has the beneficial effects of the filtering device provided by the first embodiment, and the description is omitted.

The dust collection equipment further comprises a dust collection cup 3, and a dust collection port 301 is formed in the bottom of the dust collection cup 3.

The filter device is detachably arranged in the dust cup 3, the bottom end of the fluid pipeline 11 is in sealing contact with the bottom of the dust cup 3, and the fluid inlet 101 is communicated with the dust suction port 301, so that the dust-containing fluid entering the dust cup from the dust suction port 301 is completely led into the filter device (first filter component) through the fluid inlet 101.

The partition plate 16 is in sealing contact with the side wall of the dust collecting cup, and the cover body 25 is in sealing contact with the side wall of the dust collecting cup, so that the first filter assembly 1 and the second filter assembly 2 are divided into a closed dust removing space which are not interfered with each other, and the dust collecting equipment has better dust removing effect.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (20)

1. A filter device, comprising:

a first filtering component (1) for performing primary filtering on the fluid entering the filtering device;

the second filtering component (2) is positioned at the downstream of the first filtering component (1) and is used for carrying out secondary filtering on the fluid filtered by the first filtering component (1);

wherein the second filter assembly (2) comprises a cyclone cone (21) and a motor assembly cavity (21);

the motor assembling cavity (21) is used for assembling a motor;

the cyclone cones (22) are arranged in a plurality of positions, and the cyclone cones (22) are arranged on the outer side of the motor assembly cavity (21) in a surrounding mode so as to filter fluid entering the second filtering component (2) in a cyclone mode.

2. A filter device as claimed in claim 1, wherein the first filter assembly (1) is provided with a central dust collecting space for storing the dust secondarily filtered out by the second filter assembly (2);

the second filtering component (2) further comprises a dust guide piece (23), wherein the dust guide piece (23) is communicated with the middle dust collecting space and the cyclone cone (22) respectively so as to guide the filtered dust of the cyclone cone (22) into the central dust collecting space.

3. A filter arrangement as claimed in claim 2, c h a r a c t e r i z e d in that the first filter assembly (1) comprises a fluid conduit (11), a filter house (12), a flow guide (13) and a dust collecting ring wall (15);

the fluid pipeline (11) is provided with a fluid inlet (101) and a fluid outlet (102), and at least one part of the fluid pipeline (11) is enclosed inside the side wall of the first filtering component (1);

the filter part (12) is arranged around the outer side of the fluid pipeline (11), and the filter part (12) forms a part of the side wall of the first filter assembly (1);

one end of the flow guide part (13) is connected with the fluid outlet (102), and the other end of the flow guide part (13) faces the filtering part (12) so as to guide the fluid in the fluid pipeline (11) to the filtering part (12);

the dust collection annular wall (15) is positioned between the fluid pipeline (11) and the side wall of the first filtering component (1), the bottom end of the dust collection annular wall (15) is connected with the bottom plate of the first filtering component (11), and a gap is formed between the dust collection annular wall (15) and the fluid pipeline (11) as well as between the dust collection annular wall and the side wall of the first filtering component (1);

the central dust collecting space is enclosed among the dust collecting annular wall (15), the fluid pipeline (11) and the bottom plate (14) of the first filtering component (1);

and a circulation space is defined among the dust collection annular wall (15), the bottom plate (14) of the first filtering component (1) and the first filtering component (1) so as to provide fluid circulation after primary filtering.

4. A filter device as claimed in claim 3, wherein the flow guide (13) extends helically from the fluid outlet (102) to the filter portion (12).

5. A filter device as claimed in claim 4, wherein the flow guide portion (13) comprises a cross plate (131) and a spiral plate (132), the cross plate (131) being located above the fluid outlet (102), the spiral plate (132) being connected to the cross plate (131), and the spiral direction of the spiral plate (132) being towards the filter portion (12).

6. The filtering device according to claim 5, wherein the flow guide part (13) further comprises a baffle plate (13), one end of the baffle plate (13) is vertically connected with the transverse plate (131), the other end of the baffle plate (131) is connected with the spiral plate (132), and the inner side of the baffle plate (13) is connected with the side wall of the first filtering assembly (1).

7. A filter device as claimed in claim 3, characterised in that the dust guide (23) is located below the motor assembly chamber (21) and the cyclone cone (22);

the bottom of the dust guide piece (23) is butted with the top of the side wall of the first filter assembly (1).

8. A filter device as claimed in claim 7, wherein the dust guide (23) is provided at its bottom with a gas guide opening (201) and a dust collection opening (202), the gas guide opening (201) being in communication with the flow-through space and the dust collection opening (202) being in communication with the central dust collecting space.

9. The filtering device as claimed in claim 8, wherein the dust guiding member (23) comprises a conical ring wall (231) and a bottom cover (232), the bottom cover (232) is connected with the bottom of the conical ring wall (231), and the bottom cover (232) is provided with the air guiding opening (201) and the dust collecting opening (202).

10. The filtering device according to claim 9, wherein the bottom cover (232) comprises a cover plate portion (232a), the cover plate portion (232a) being provided to cover a top end of the fluid duct (11);

the bottom end of the conical annular wall (231) is matched with the top of the dust collecting annular wall (15) in shape, one part of the bottom end of the conical annular wall (231) is connected with the upper end face of the cover plate part (232a), and the rest part of the bottom end of the conical annular wall (231) is butted with the dust collecting annular wall (15);

the bottom end of the conical annular wall (231) and the cover plate part (232a) enclose the dust collection port (202);

the air guide opening (201) is positioned on the outer side of the conical annular wall (231).

11. The filtering device as claimed in claim 10, wherein a plurality of support bars (232b) are provided in the air guide opening (201), one end of the support bars (232b) is connected with the tapered annular wall (231), and the other end of the support bars (232b) is connected with the side wall of the bottom cover (232);

and a supporting plate (232c) is arranged between the top end surface of the bottom cover (232) and the conical annular wall (231).

12. The filtering device according to claim 10, characterized in that said conical annular wall (231) is inclined progressively outwards from bottom to top.

13. A filter device as claimed in claim 10, wherein the top outer edge of the conical annular wall (231) is arranged around the outside of the cyclone cone (22) and the bottom of the motor assembly chamber (21).

14. A filter device as claimed in claim 13, characterized in that the cyclone cone (22) is provided with an air inlet (203), an air outlet (204) and a dust guide opening (205);

the dust guide opening (205) is positioned at the lowest point of the cyclone cone (22), and the conical annular wall (231) is arranged around the outer side of the dust guide opening (205);

the air inlet (203) is formed in the side wall of the cyclone cone (22);

the air outlet (204) is formed in the top end of the cyclone cone (22).

15. The filtering device according to claim 14, characterized in that a connecting plate (24) is arranged between two adjacent cyclone cones (22), and the connecting plate (24) extends from the top end of the side wall of the cyclone cone (22) to the bottom end of the side wall of the cyclone cone (2);

the air inlet (203) is positioned outside the connecting plate (24);

the top of the conical annular wall (231) is in sealing butt joint with the connecting plate (24) and the bottom of the cyclone cone (22), and the conical annular wall (231) is arranged around the outer side of the dust guide opening (205).

16. The filtering device according to claim 15, characterized in that the second filtering assembly (2) further comprises a cover body (25), wherein the cover body (25) is arranged on the top of the motor assembling cavity (21), the cyclone cone (22) and the connecting plate (24);

lid (25) are equipped with air guide district (251), air inlet district (252) and air-out district (253), and air-out district (253) encloses the outside of locating air inlet district (252), and air guide district (251) encloses the outside of locating air-out district (253), and air guide district (251) with whirlwind awl (22), connecting plate (24) are corresponding, air inlet district (252) and air-out district (253) with motor assembly chamber (21) is corresponding.

17. The filtering device according to claim 16, wherein the air guiding area (251) is provided with air guiding ports (206), the air guiding ports (206) correspond to the cyclone cones (22) one by one, and the air guiding ports (206) are communicated with the air outlet (204);

the air inlet area (252) is provided with an air inlet (207) communicated with the motor assembly cavity (21);

the air outlet area (253) is provided with an air outlet (208) communicated with the motor assembly cavity (21).

18. The filter device according to any one of claims 2 to 17, wherein a partition (16) is arranged at the top end of the side wall of the first filter assembly (1), the partition (16) is arranged around the outer side of the side wall of the first filter assembly (1), and the partition (16) is positioned above the flow guide part (13).

19. A vacuum cleaning apparatus comprising a filter device as claimed in any one of claims 1 to 18.

20. The suction device as claimed in claim 19, further comprising a dirt cup, said filter means being removably mounted in said dirt cup;

the partition plate (16) of the first filter assembly (1) and the cover body (25) of the second filter assembly (2) are in sealing contact with the side wall of the dust collecting cup.

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