CN111001252A - Filtering component and dust collection cup body - Google Patents

Abstract

The invention relates to a filter assembly and a dust collection cup body, belongs to the field of cleaning equipment, and solves the problems that the filter assembly in the existing dust collector has high working pressure, and dust in a dust storage area can be guided to the filter assembly again. The filter assembly comprises an outer cover body, an air deflector and a filter housing, wherein the filter housing is positioned in the outer cover body; a spiral channel is formed among the air deflector, the outer cover body and the filter cover; the fluid entering the filtering component is centrifugally filtered by the spiral channel, and is guided to the filtering cover for next filtering after flowing out of the spiral channel. The spiral channel is arranged, so that the dust-containing fluid can centrifugally rotate in the conduction process to realize centrifugal filtration and dust removal, and the working pressure of the filter cover on the dust-containing fluid filtration is reduced; through setting up the outer cover body, separate the filter mantle with the dust storage area of collection dirt cup body effectively to prevent that the dust in the dust storage area from leading the filter mantle once more, thereby reduce filter assembly's operating pressure.

Description

Filtering component and dust collection cup body

Technical Field

The invention relates to the technical field of cleaning equipment, in particular to a filter assembly and a dust collection cup body.

Background

In the existing dust collector, the dust-containing fluid directly flows to the filtering component for filtering through the suction pipeline, and the dust-containing fluid can only remove dust through the filtering component, so that the working pressure of the filtering component is overlarge. In addition, the dust storage area is positioned below the filter assembly, when the negative pressure suction force is larger, dust particles in the dust storage area can still be guided to the filter assembly again, and the working pressure of the filter assembly is increased.

Disclosure of Invention

In view of the above, the present invention provides a filter assembly and a dust cup body, which are used to solve the problems of the prior art that the filter assembly has a high working pressure and the dust in the dust storage area is guided to the filter assembly again.

In one aspect, the invention provides a filter assembly, which comprises an outer cover body, an air deflector and a filter housing, wherein the filter housing is positioned in the outer cover body, and the air deflector is positioned between the outer cover body and the filter housing; a spiral channel is formed among the air deflector, the outer cover body and the filter cover; the fluid entering the filtering component is centrifugally filtered by the spiral channel, and is guided to the filtering cover for next filtering after flowing out of the spiral channel.

Furthermore, the outer cover body is of a hollow structure with an open rear end, an air inlet is formed in the front end face of the outer cover body, and the air inlet is communicated with the inlet of the spiral channel.

Furthermore, a dust outlet is formed in the rear end face of the outer cover body and communicated with the outlet of the spiral channel.

Further, the dust outlet extends from the top of the outer cover body to the bottom of the outer cover body along one side of the side wall of the outer cover body.

Further, the filter cover comprises a closed part and a filter part, and the spiral channel is formed among the closed part, the outer cover body and the air guide plate.

Furthermore, the filtering part is of a hollow structure with an open rear end, and filtering meshes are arranged on the side wall of the filtering part.

Further, the air deflector is a spiral plate, the spiral plate extends to the dust outlet of the outer cover body along the central axis of the filter cover from the front end face of the outer cover body in a spiral manner, and a cavity between the filter cover and the outer cover body is constructed into the spiral channel.

Further, a sleeve is sleeved outside the filter cover;

the air deflector is positioned between the sleeve and the outer cover body, and forms the spiral channel with the sleeve and the outer cover body.

Furthermore, the dust shield also comprises a dust shield plate which is positioned at the bottom of the outer cover body.

In another aspect, the present disclosure provides a dirt cup body including the filter assembly described above.

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

(1) by arranging the spiral channel, the dust-containing fluid can be centrifugally rotated in the conduction process, so that centrifugal filtration and dust removal are realized, and the working pressure of the filter cover on the dust-containing fluid filtration is reduced;

(2) by arranging the outer cover body, the filter cover is effectively separated from the dust storage area of the dust collection cup body, so that dust in the dust storage area is prevented from being guided to the filter cover again, and the working pressure of the filter assembly is reduced;

(3) the filter cover comprises a sealing part and a filtering part, the sealing part, the outer cover body and the air deflector form a spiral channel, fluid discharged from the spiral channel is guided to the filtering part, after the fluid containing dust centrifugally rotates in the spiral channel, large-particle dust is centrifugally filtered and then thrown out of the filter assembly from the dust outlet, after the fluid containing dust is further filtered by the filtering part, small-particle dust is filtered and then discharged out of the filter assembly from the dust outlet, so that the filter assembly realizes graded filtering, and the dust removal and filtration effects are remarkably improved;

(4) the bottom of the outer cover body is provided with the dust baffle plate, so that cyclone can be prevented from being generated in the dust storage area in the dust collection cup body, and dust in the dust storage area is effectively prevented from being guided to the dust outlet along with the cyclone;

(5) after entering the dust collecting cup body through the fluid inlet, the dust-containing fluid is subjected to three-stage filtration through the spiral channel, the filtering part and the filtering layer, the three are relatively independent, and the dust-containing fluid is filtered by the dust-containing fluid with different particle sizes, so that the dust collecting cup body realizes graded filtration of the dust-containing fluid, and the improvement is obviously improved;

(6) the dust-containing fluid enters the interior of the outer cover body through the guide of the inlet pipe, and the dust-containing fluid is favorable for centrifugally rotating around the filter cover under the guide of the air deflector.

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 block diagram of a filter assembly according to a first embodiment;

FIG. 2 is a partial cross-sectional view of a filter assembly according to the first embodiment;

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

FIG. 4 is a partial structural view of a dust cup body according to the second embodiment;

FIG. 5 is a partial sectional view of the dirt cup body of the second embodiment;

FIG. 6 is a partial structural view of a dust cup body according to the second embodiment;

FIG. 7 is a sectional view of the dirt cup body of the second embodiment;

figure 8 is a cross-sectional view of the dirt cup body of the second embodiment.

Reference numerals:

1-a filter assembly; 101-outlet of spiral channel; 11-an outer cover body; 111-a dust outlet; 12-a wind deflector; 13-a filter mantle; 131-a sealing part; 132-a filter section; 133-bar-shaped grooves; 134-card board; 14-a sleeve; 15-dust board;

2-a sidewall portion; 3-front end; 31-a fluid inlet; 32-an introduction tube; 4-a cover plate; 41-a communication port; 5-a filter layer; 6-rear end cap; 61-a fluid outlet; 7-a dust storage area; 8-front cover body; 81-fluid line.

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. 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 embodiment provides a filter assembly, as shown in fig. 1 to 3, which includes an outer cover 11, an air deflector 12 and a filter housing 13, where the filter housing 13 is located in the outer cover 11, and the air deflector 12 is located between the outer cover 11 and the filter housing 13, and forms a spiral channel together with the outer cover 11 and the filter housing 13. The fluid entering the filter assembly 1 is firstly centrifugally filtered by the spiral channel, and then is guided to the filter cover 13 for further filtering after flowing out of the spiral channel.

Specifically, the dust-containing fluid enters from the inlet of the spiral channel, centrifugally rotates through the spiral channel, the dust with larger particles is separated out under the centrifugal action and is discharged out of the filter assembly through the outlet 101 of the spiral channel, and the fluid is discharged out of the outlet 101 of the spiral channel and then is guided to the filter housing 13 for further filtering. It should be noted that the fluid led out from the outlet 101 of the spiral channel flows in a direction toward the rear end of the filter housing 13, so as to ensure that the fluid can be filtered in the next step.

Compared with the prior art, the filter assembly 1 of the embodiment enables the dust-containing fluid to be centrifugally rotated in the conduction process by arranging the spiral channel, so that centrifugal filtration and dust removal are realized, and the working pressure of the filter cover 13 on the dust-containing fluid filtration is reduced. In addition, by providing the outer cover body 11, the filter cover 13 is effectively separated from the dust storage area of the dust cup body to prevent dust in the dust storage area from being guided to the filter cover 13 again, thereby reducing the operating pressure of the filter assembly.

The outer cover body 11 is hollow structure, specifically, the outer cover body 11 is the open hollow structure in rear end, and the air intake has been seted up to the preceding terminal surface, and the air intake is sealed link up with spiral passage's entry, guarantees that the fluid of flowing through filtering component 1 can both pass through spiral passage centrifugal filtration. The dust-containing fluid enters from the front end of the outer cover body 11, after centrifugal filtration through the spiral channel, large-particle dust is discharged from the rear end of the outer cover body, and the fluid is guided to the rear part of the filter cover 13 for next filtration.

The rear end face part of the outer cover body 11 is sunken to form the dust outlet 111 towards the front end face direction, namely the dust outlet 111 is opened at the rear end face of the outer cover body 11, and the dust outlet 111 is communicated with the outlet 101 of the spiral channel, so that large particle dust filtered by centrifugation is smoothly discharged from the outer cover body 11.

In this embodiment, the outer cover 11 is a cylinder structure with both open front and back ends, the inlet of the spiral channel is an air inlet, the dust outlet 111 extends from the top of the outer cover 11 to the bottom of the outer cover 11 along one side of the side wall of the outer cover 11, the outlet 101 of the spiral channel is located at the bottom of the outer cover 11, the outlet 101 of the spiral channel is communicated with the dust outlet 111, the back end face of the air deflector 12 is connected with the lower edge of the dust outlet 111, it is ensured that no barrier exists between the outlet 101 and the dust outlet 111 of the spiral channel, and dust filtered by the centrifugal filter and dust filtered by the filter cover 13 quickly fall into the dust storage area from the dust outlet 111.

The edges and corners of the dust outlet 111 are in arc transition, so that fluid can pass through the dust outlet conveniently, dust is not easy to gather, and the dust outlet 111 can prevent a user from being scratched when the filter assembly 1 is used.

The filter cover 13 is located in the outer cover body 11, specifically, the central axis of the filter cover 13 coincides with the central axis of the outer cover body 11, the filter cover 13 includes a sealing portion 131 and a filter portion 132, the filter portion 132 is located behind the sealing portion 131, the front end face and the side wall of the sealing portion 131 are closed wall faces, the sealing portion 131, the outer cover body 11 and the air deflector 12 form a spiral channel, the filter portion 132 does not participate in the formation of the spiral channel, it is ensured that the spiral channel only carries out centrifugal filtration on dust-containing fluid, so that the filter assembly realizes classified filtration, and a better dust removal and filtration effect is achieved. The filter part 132 is located behind the spiral channel, the dust-containing fluid is centrifugally filtered by the spiral channel and then guided to the filter part 132 for further filtering, and the dust filtered by the filter part 132 falls into the dust storage area from the dust outlet 111.

The filtering portion 132 is a hollow structure with an open rear end, and the side wall of the filtering portion 132 is provided with a filtering mesh, so that the dust-containing fluid flows out from the rear end of the filtering portion 132 after being further filtered by the filtering mesh.

Since the fluid guided out from the spiral channel is not directly blown to the filter part 132 under the centrifugal guiding effect, in order to better guide the fluid into the filter part 132, the filter meshes are arranged to be meshes with certain inclination, the inclination direction of the filter meshes is consistent with the spiral direction of the spiral channel, namely the filter meshes are not vertical to the central axis of the filter part 132, the inclination direction of the filter meshes is consistent with the flowing direction of the fluid guided to the filter part 132 from the outlet 101 of the spiral channel, and the fluid is more quickly guided into the filter part 132.

In this embodiment, the filter cover 13 is a tubular structure with a closed front end and an open rear end, the filter cover 13 and the outer cover body 11 are coaxially arranged, the front end surface of the filter cover 13 is a closed structure, the front end surface of the filter cover is flush with the front end surface of the outer cover body 11, the rear end surface of the filter cover 13 is an open opening, the rear end surface of the filter cover is flush with the rear end surface of the outer cover body 11, and fluid filtered by the filter cover 13 is discharged from the rear end port of the filter cover. The sealing portion 131 and the filtering portion 132 of the filter cover 13 are integrally formed, the sealing portion 131 is a tube with a closed front end surface and a closed side wall, the filtering portion 132 is a tube with a side wall full of filter meshes and an open rear end, and the filtering portion 132 corresponds to the dust outlet 111, so that dust can be conveniently discharged from the dust outlet 111.

In this embodiment, the width of the dust outlet 111 is not less than the length from the outlet 101 of the spiral channel to the rear end face of the filter part 132, so that the dust centrifugally discharged from the spiral channel and the dust filtered by the filter part 132 can be rapidly discharged out of the filter assembly 1 from the dust outlet 111.

The sealing portion 131 is of a solid structure, so that the fluid is prevented from forming a vortex in the filter housing 13 and being rapidly discharged from the rear end of the filter housing 13.

The air deflector 12 is located between the filter cover 13 and the outer cover body 11, and forms a spiral channel together with the filter cover 13 and the outer cover body 11. Specifically, the air deflector 12 is a spiral plate, and the spiral plate extends spirally from the front end face of the outer cover body 11 to the dust outlet 111 along the central axis of the filter cover 13, so as to configure the cavity between the filter cover 13 and the outer cover body 11 into a spiral channel, that is, the inner spiral side of the spiral plate is in sealed connection with the outer side wall of the filter cover 13, the outer spiral side of the spiral plate is in sealed connection with the inner side wall of the outer cover body 11, and the front end face of the spiral plate is flush with the front end faces of the outer cover body 11 and the filter cover 13.

After entering the filter assembly 1 from the front end face of the outer cover body 11, the dusty fluid is guided by the spiral plate, centrifugally rotates around the filter cover 13, and is guided to the dust outlet 111 from the front end face of the outer cover body 11, and in the process, larger particles in the dusty fluid are directly thrown out of the filter assembly 1 under the centrifugal action and fall into a dust storage area when approaching the dust outlet 111; smaller particles in the dust-containing fluid are guided to the filtering part 132 of the filtering cover 13 along with the fluid, filtered by the filtering meshes and then fall into the dust storage area from the dust outlet 111; and the fluid after twice filtering and dust removing is discharged out of the filter assembly 1 from the rear port of the filter portion 132.

It should be noted that the central angle of the spiral plate is α ≥ 360 °, that is, the number of spiral turns of the spiral plate around the central axis of the filter housing 13 is at least one, so that the spiral plate has good spiral guiding effect on the dust-containing fluid and improves the centrifugal dust removing effect of the spiral channel, however, the central angle of the spiral plate should not be too large, so as to avoid the dust-containing fluid passing through the spiral channel for too long time, which reduces the filtering rate of the filter assembly 1, and large particle dust may be retained in the channel due to the too long spiral channel, which is not beneficial to dust discharge, even causes the channel to be blocked, which affects the fluid circulation, therefore, α < 720 °, in short, 360 ° ≦ α < 720 °.

In this embodiment, α is 400 °, and the rear end face of the spiral plate faces the dust outlet 111 and contacts with the bottom edge of the dust outlet 111, so that large particle dust is discharged from the spiral channel and directly falls into the dust storage area from the dust outlet 111 under the action of gravity.

In order to improve the stability of the filter cover 13 and facilitate replacement and maintenance of the filter cover 13, a sleeve 14 is sleeved outside the filter cover 13, specifically, the sleeve 14 is sleeved outside the sealing portion 131, at this time, the air guide plate 12 is located between the sleeve 14 and the outer cover body 11 and forms a spiral channel together with the sleeve 14 and the outer cover body 11, the filter cover 13 can be taken out from the sleeve 14, and the filter cover 13 and the sleeve 14 are connected in a detachable connection manner.

In this embodiment, the sleeve 14 is a cylinder structure with a closed front end and an open rear end, the filter housing 13 is detachably sleeved in the sleeve 14, and the outer diameter of the filter housing 13 is equal to the inner diameter of the sleeve 14, so that the filter housing 13 is stable and does not shake in the sleeve 14. Because the inner wall of the sleeve 14 is tightly attached to the outer wall of the filter housing 13, in order to conveniently take and place the filter housing 13, the outer side wall of the filter housing 13 is provided with a strip-shaped groove 133, the strip-shaped groove 133 extends from the foremost end to the rearmost end of the outer side wall of the filter housing 13, the strip-shaped groove 133 is a linear groove, and the straight line is parallel to the central axis of the filter housing 13. In this embodiment, three strip grooves 133 are disposed on the outer sidewall of the filter housing 13 and are uniformly distributed on the outer sidewall of the filter housing 13.

In order to prevent the filter cover 13 from being separated from or loosened from the sleeve 14 in the use process of the filter assembly 1, a clamping plate 134 is arranged in the strip-shaped groove 133, the clamping plate 134 can slide in the strip-shaped groove 133, the clamping plate 134 can be clamped between the filter cover 13 and the sleeve 14, so that the filter cover 13 is fixed in the sleeve 14, the filter cover 13 is not easy to fall off or loosen from the sleeve 14, and when the filter cover 13 is detached from the sleeve 14, external force is applied to the clamping plate 134 to slide out the clamping plate from the space between the filter cover 13 and the sleeve 14, namely, the filter cover 13 can be taken out from the sleeve 14.

In this embodiment, the sleeve 14, the air deflector 12 and the outer cover 11 are integrally formed, so that the filter assembly 1 has good stability.

It should be noted that, when the filter assembly 1 includes the sleeve 14, the filter housing 13 may remove the sealing portion 131, and only the filter portion 132 is provided, and at this time, the front end surface of the sleeve 14 is a closed structure, and the filter portion 132 is detachably connected to the rear end of the sleeve 14, for example, the filter portion 132 is detachably connected to the rear end of the sleeve 14 by a threaded connection, a clamping connection, or the like, so as to replace and maintain the filter portion 132. The sleeve 14 may also be of solid construction.

In order to further prevent the dust in the dust storage area from being guided to the dust outlet 111 again, the filter assembly 1 further comprises a dust baffle plate 15, the dust baffle plate 15 is located at the bottom of the outer cover 11, and the dust baffle plate 15 is arranged along the central axis direction of the outer cover 11, so that the dust storage area in the dust collection cup can be prevented from generating whirlwind, and the dust in the dust storage area can be effectively prevented from being guided to the dust outlet 11 along with the whirlwind. In this embodiment, the dust guard 15 has the following two structures:

(1) the dust guard 15 is a vertical plate, specifically, the vertical plate is located at the front end of the bottom of the outer cover 11, and the vertical plate is perpendicular to the end face of the bottom of the outer cover 11, that is, the central axis of the outer cover 11 is located on the plane where the vertical plate is located. As shown in fig. 1-3, the distance from the dust outlet 111 to the front end surface of the outer cover 11 (i.e., the distance from the edge of the most front side of the dust outlet 111 to the front end surface of the outer cover 11) is S, the length of the vertical plate is L, and S/3 is not less than L and not more than S.

(2) The dust guard 15 is an inclined plate, specifically, the inclined plate is located on the bottom end surface of the outer cover 11, an included angle between a plane where the inclined plate is located and a plane where the bottom end surface of the outer cover 11 is an acute angle, and the inclined plate is inclined toward the direction where the dust outlet 111 is located. In this embodiment, the length of swash plate equals the length of the outer cover body 11 (i.e. the distance from the front end face to the rear end face of the outer cover body 11), and the swash plate meets with the bottom edge of dust outlet 111, so, the swash plate can not only effectively prevent the dust in dust storage area from leading to dust outlet 111, makes the dust can be detained in dust storage area, can also lead to dust storage area fast with the dust that dust outlet 111 discharges.

The filter assembly provided by the embodiment has at least one of the following beneficial effects:

(1) by arranging the spiral channel, the dust-containing fluid can be centrifugally rotated in the conduction process to realize centrifugal filtration and dust removal, so that the working pressure of the filter cover on the dust-containing fluid filtration is reduced;

(2) by arranging the outer cover body, the filter cover is effectively separated from the dust storage area of the dust collection cup body, so that dust in the dust storage area is prevented from being guided to the filter cover again, and the working pressure of the filter assembly is reduced;

(3) the filter cover comprises a sealing part and a filtering part, the sealing part, the outer cover body and the air deflector form a spiral channel, fluid discharged from the spiral channel is guided to the filtering part, after the fluid containing dust centrifugally rotates in the spiral channel, large-particle dust is centrifugally filtered and is thrown out of the filter assembly from the dust outlet, after the fluid containing dust is further filtered by the filtering part, small-particle dust is filtered and is discharged out of the filter assembly from the dust outlet, so that the filter assembly realizes classified filtration and has better dust removal and filtration effects;

(4) the bottom of the outer cover body is provided with the dust baffle plate, so that cyclone can be prevented from being generated in the dust storage area in the dust collection cup body, and dust in the dust storage area is effectively prevented from being guided to the dust outlet along with the cyclone.

Example two

The present embodiment provides a dirt cup body, as shown in fig. 4-8, including the filter assembly 1 and dirt cup provided in the first embodiment, with the filter assembly 1 positioned within the dirt cup.

The dust cup comprises a side wall portion 2, a front end portion 3, a cover plate 4, a filter layer 5 and a rear end cap 6.

The side wall part 2, the front end part 3 and the rear end cover 6 together form a shell of the dust collection cup body, specifically, the front end part 3 is positioned in front of the side wall part 2, the rear end cover 6 is detachably covered at the rear end of the side wall part 2, the front end part 3 is provided with a fluid inlet 31, the rear end cover 6 is provided with a fluid outlet 61, dust-containing fluid enters the dust collection cup body from the fluid inlet 31, and is discharged out of the dust collection cup body from the fluid outlet 61 after being filtered and dedusted, so that the front end part 3 and the side wall part 2 and the rear end cover 6 and the side wall part 2 are in sealed connection, and fluid can only enter and exit the dust collection.

The filter assembly 1, the cover plate 4 and the filter layer 5 are sequentially arranged in a shell formed by the side wall part 2, the front end part 3 and the rear end cover 6, the filter assembly 1 is limited between the front end part 3 and the cover plate 4, the filter layer 5 is arranged in the cover plate 4, and the cover plate 4 is provided with a communication port 41 for fluid circulation. Specifically, the front end face of the outer cover 11 is connected with the front end portion 3 in a sealing manner, and the air inlet of the outer cover 11 is communicated with the fluid inlet 31; the rear end face of the filter housing 13 is connected to the cover plate 4 in a sealing manner, and the rear end port of the filter housing 13 communicates with the communication port 41.

In order to ensure the filtering effect of the filter housing 13 on the fluid, the rear end face of the outer housing 11 (excluding the rear end face where the dust outlet 111 is formed) is hermetically connected to the cover plate 4, so that the fluid discharged from the spiral passage and guided to the filter portion 132 does not flow away from the gap between the rear end face of the outer housing 11 and the cover plate 4, and the filtering effect of the filter portion 132 on the fluid is not affected, so that the cyclone is not formed in the dust storage region 7.

The inner wall of the side wall part 2, the outer wall of the outer cover 11, the cover plate 4 and the front end part 3 together enclose a dust storage area 7 of the dust cup body. The cover plate 4 is hermetically connected with the rear end cover 6, and jointly encloses an assembly cavity for assembling the filter layer 5, the shape of the filter layer 5 is matched with that of the assembly cavity, so that all fluid flowing into the assembly cavity from the communication port 41 is filtered by the filter layer 5 and then discharged from the fluid outlet 61. The material of the filter layer 5 adopts filter cotton or filter hypa.

In this embodiment, the top end of the outer wall of the outer cover 11 contacts the top end of the outer wall of the side wall portion 2, so that the dust storage area 7 is located below the outer cover 11, thereby facilitating dust storage. Correspondingly, the position of the communication port 41 is also located on the upper center of the cover plate 4 and is matched with the position of the rear port of the filter cover 13.

After the dirty fluid gets into the collection dirt cup body from fluid entry 31, earlier through the helical passage centrifugal filtration that carries on, throw away large granule dust filtering component and fall into in the dust storage area, fluid is followed helical passage discharge back direction filter part 132, after filter part 132 further filters the fluid, the tiny particle dust falls into in the dust storage area, fluid is from filter part 132 back port direction filter layer 5 in the cover plate 4, filter layer 5 filters the back to the fluid, the fluid is followed fluid outlet 61 and is discharged, so, the dust cup body can realize tertiary filtration to the dirty fluid that flows in, has fabulous dust removal effect.

The rear end cover 6 is detachably connected with the side wall part 2, so that the cover plate 4, the filter layer 5 and the filter assembly 1 are conveniently taken, replaced and maintained, and dust in the dust storage area 7 is conveniently cleaned.

For the dust in more convenient clearance dust storage area 7, offer the clearance mouth that is used for empting the dust at lateral wall portion 2 bottom or lateral wall, be equipped with on the clearance mouth rather than the looks adaptation, can open closed apron, and the apron is located the outside of lateral wall portion 2, and apron and clearance mouth adopt sealing connection, guarantee the leakproofness of collection dirt cup body. The apron can cover on the clearance mouth through buckle spare, slider etc. when the dust in the dust storage area 7 is cleared up to needs, opens the apron or slides open, emptys out the dust through the clearance mouth, then with the apron lid back or slide back to the clearance mouth on.

In order to introduce the dust-containing fluid into the dust cup body better, an introduction pipe 32 is arranged on the fluid inlet 31 of the front end part 3, the front end of the introduction pipe 32 is an inclined end, the rear end surface of the introduction pipe 32 is connected with the front end part 3 in a sealing way, namely, the rear port of the introduction pipe 32 is communicated with the fluid inlet 31, and the dust-containing fluid flows into the spiral channel through the guidance of the introduction pipe 32.

The dust collection cup body further comprises a front cover body 8, the front cover body 8 is detachably covered on one side, far away from the side wall portion 2, of the front end portion 3, the front cover body 8 is provided with a flow guide pipeline 81 communicated with the leading-in pipe 32, an outlet of the flow guide pipeline 81 is matched with a front port of the leading-in pipe 32, namely the outlet of the flow guide pipeline 81 is an inclined port, and dust-containing fluid is guided to the leading-in pipe 32 through the fluid pipeline 81, so that the structure of the dust collection cup body is firmer and the fluid circulation is smoother.

In order to improve the flow rate of the dust-containing fluid entering the filter assembly 1, the inlet aperture of the flow guide pipeline 81 is larger than the outlet aperture, namely, the flow guide pipeline 81 is a tapered pipeline, so that the flow rate of the dust-containing fluid entering the filter assembly 1 is effectively improved, the centrifugal force of the fluid in the spiral channel is further improved, and the filter assembly has a better centrifugal dust removal effect.

Compared with the prior art, the beneficial effects of the dust collection cup body provided by the embodiment include not only the beneficial effects of the filter assembly provided by the first embodiment (which are not described herein any more), but also one of the following beneficial effects:

(1) after entering the dust collecting cup body through the fluid inlet, the dust-containing fluid is filtered step by step through the spiral channel, the filtering part and the filtering layer, and the three parts are relatively independent to each other and filter the dust with different particle sizes in the dust-containing fluid, so that the dust collecting cup body realizes the classified filtration of the dust-containing fluid and has excellent filtering effect;

(2) the dust-containing fluid enters the interior of the outer cover body through the guide of the inlet pipe, and the dust-containing fluid is favorable for centrifugally rotating around the filter cover under the guide of the air deflector.

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 (10)

1. A filter assembly is characterized by comprising an outer cover body (11), an air deflector (12) and a filter cover (13), wherein the filter cover (13) is positioned in the outer cover body (11), and the air deflector (12) is positioned between the outer cover body (11) and the filter cover (13);

a spiral channel is formed among the air deflector (12), the outer cover body (11) and the filter cover (13);

the fluid entering the filter assembly (1) is centrifugally filtered by the spiral channel, flows out of the spiral channel and is guided to the filter cover (13) for next-step filtration.

2. The filter assembly according to claim 1, wherein the outer cover (11) is a hollow structure with an open rear end, and an air inlet is formed in a front end surface of the outer cover (11) and is communicated with an inlet of the spiral passage.

3. The filter assembly according to claim 2, wherein the rear end face of the outer cover (11) is provided with dust outlet (111), and the dust outlet (111) is communicated with the outlet (101) of the spiral channel.

4. A filter assembly according to claim 3, wherein the dust outlet (111) extends from the top of the housing (11) along one side of the housing (11) side wall to the bottom of the housing (11).

5. The filter assembly according to claim 1, wherein the filter housing (13) comprises a closed portion (131) and a filter portion (132), and the spiral channel is formed between the closed portion (131) and the outer housing body (11) and the air deflector (12).

6. The filter assembly according to claim 5, wherein the filter part (132) is a hollow structure with an open rear end, and a filter mesh is provided on a side wall of the filter part (132).

7. The filter assembly according to claim 1, wherein the air deflector (12) is a spiral plate which extends spirally from the front end face of the outer cover body (11) along the central axis of the filter cover (13) to the dust outlet (111) of the outer cover body (11), and the cavity between the filter cover (13) and the outer cover body (11) is configured as the spiral channel.

8. A filter assembly as claimed in claims 1 to 7, wherein the filter housing (13) is externally sheathed with a sleeve (14);

the air deflector (12) is positioned between the sleeve (14) and the outer cover body (11), and forms the spiral channel with the sleeve (14) and the outer cover body (11).

9. A filter assembly as claimed in claims 1 to 7, further comprising a dust guard (15), the dust guard (15) being located at the bottom of the outer housing (11).

10. A dust cup body, characterized in that it comprises a filter assembly (1) according to claims 1-9.

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