A filter unit and dust collecting cup

Abstract

The present invention relates to a filter unit and a dust cup body, belonging to the technical field of cleaning equipment, and is used to solve the problem that the working pressure of the filter unit in the existing vacuum cleaner is high and the dust in the dust storage area will be directed to the filter unit again. The filter unit of the present invention includes a pre-filter component and a post-filter component; the pre-filter component includes an outer cover body, an air guide plate and a filter cover, and a spiral channel is formed between the air guide plate and the outer cover body and the filter cover; the post-filter component includes a cover plate and a filter layer, and a connecting port for fluid circulation is opened on the cover plate; the fluid entering the filter unit is first centrifugally rotated in the spiral channel for the first step of filtration, and the fluid is discharged from the outlet of the spiral channel and then directed to the filter cover for the second step of filtration, and the fluid is discharged from the filter cover and then directed to the filter layer for the third step of filtration. The present invention can filter dust of different particle sizes in dust-containing fluid, so that the filter unit can achieve graded filtration of dust-containing fluid, and the filtering effect is significantly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment, and in particular to a filter unit and a dust collecting cup. Background Art

[0002] In existing vacuum cleaners, dust-laden fluid flows directly to the filter unit through the suction pipe for filtration, and the dust-laden fluid can only be removed by the filter unit, resulting in excessive working pressure of the filter unit. In addition, the dust storage area is located below the filter unit. When the negative pressure suction force is large, the dust particles in the dust storage area will still be directed to the filter unit again, increasing the working pressure of the filter unit. Summary of the invention

[0003] In view of the above analysis, the present invention aims to provide a filter unit and a dust cup to solve the problem that the filter unit in the existing vacuum cleaner has a high working pressure and the dust in the dust storage area will be redirected to the filter unit.

[0004] In one aspect, the present invention provides a filter unit, comprising a pre-filter assembly and a post-filter assembly; the pre-filter assembly comprises an outer cover, an air guide plate and a filter cover, a spiral channel is formed between the air guide plate, the outer cover and the filter cover; the post-filter assembly comprises a cover plate and a filter layer, a communication port for fluid circulation is provided on the cover plate;

[0005] The fluid entering the filter unit is first centrifugally rotated through the spiral channel for the first step of filtration, and then discharged from the outlet of the spiral channel and directed to the filter cover for the second step of filtration. After being discharged from the filter cover, the fluid is directed to the filter layer for the third step of filtration.

[0006] Further, the filter cover is located in the outer cover body, and the air guide plate is located between the outer cover body and the filter cover;

[0007] The filter layer is located inside the cover plate.

[0008] Furthermore, the outer cover body is a hollow structure with an open rear end, and an air inlet is provided on the front end surface of the outer cover body, and the air inlet is connected to the entrance of the spiral channel.

[0009] Furthermore, a dust outlet is provided on the rear end surface of the outer cover body, and the dust outlet is communicated with the outlet of the spiral channel.

[0010] Furthermore, the pre-filter assembly also includes a dust shield, which is located at the bottom of the outer cover.

[0011] Furthermore, the dust shield plate is an inclined plate, the angle between the inclined plate and the bottom end surface of the outer cover body is an acute angle, and the inclined plate is inclined toward the dust outlet of the outer cover body.

[0012] Furthermore, the front and rear ends of the inclined plate are flush with the front end surface of the outer cover body and the front edge of the dust outlet respectively.

[0013] Furthermore, the front and rear ends of the inclined plate are flush with the front and rear end surfaces of the outer cover respectively.

[0014] Furthermore, the dust shield is a vertical plate, which is located at the front end of the bottom of the outer cover body, and the vertical plate is perpendicular to the bottom end surface of the outer cover body.

[0015] Further, the filter cover includes a sealing portion and a filtering portion;

[0016] The spiral channel is formed between the sealing portion, the outer cover and the air guide plate;

[0017] The filter part is a hollow structure with an open rear end, a filter mesh hole is arranged on the side wall of the filter part, and a rear port of the filter part is communicated with the communication port.

[0018] On the other hand, the present invention provides a dust cup body, including the above-mentioned filter unit.

[0019] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0020] (1) The pre-filter assembly is provided with a spiral channel, so that the dust-containing fluid can be centrifugally rotated during the conduction process, realizing centrifugal filtration and dust removal, thereby reducing the working pressure of the filter cover on the dust-containing fluid filtration;

[0021] (2) The pre-filter assembly effectively separates the filter cover from the dust storage area of ​​the dust cup body by providing an outer cover body to prevent the dust in the dust storage area from being directed to the filter cover again, thereby reducing the working pressure of the pre-filter assembly;

[0022] (3) The filter cover includes a sealing part and a filtering part. The sealing part, the outer cover body and the air guide plate form a spiral channel. The fluid discharged from the spiral channel is guided to the filtering part. After the dust-containing fluid is centrifugally rotated in the spiral channel, large dust particles are centrifugally filtered and then thrown out of the pre-filter component from the dust outlet. After the dust-containing fluid is further filtered through the filtering part, small dust particles are filtered and then discharged from the pre-filter component from the dust outlet, so that the pre-filter component can achieve graded filtration, and the dust removal and filtration effect is significantly improved;

[0023] (4) A dust shield is provided at the bottom of the outer cover body to prevent a cyclone from being generated in the dust storage area in the dust collecting cup body, and effectively prevent the dust in the dust storage area from being guided to the dust outlet by the cyclone;

[0024] (5) After the dust-laden fluid enters the filter unit through the fluid inlet, it undergoes three-stage filtration through the spiral channel, filter section, and filter layer. The three are relatively independent of each other and filter dust of different particle sizes in the dust-laden fluid, so that the filter unit can achieve graded filtration of the dust-laden fluid, and the filtration effect is significantly improved.

[0025] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings are only for the purpose of illustrating specific embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0027] Figure 1 It is a structural diagram of a first pre-filter component of a specific embodiment;

[0028] Figure 2 It is a structural diagram of a second pre-filter assembly of a specific embodiment;

[0029] Figure 3 It is a structural diagram of a third pre-filter assembly of a specific embodiment;

[0030] Figure 4 is a cross-sectional view of a third pre-filter assembly of a specific embodiment;

[0031] Figure 5 It is a structural diagram of the first dust cup body of a specific embodiment;

[0032] Figure 6 A perspective view of a first dust collecting cup body according to a specific embodiment;

[0033] Figure 7 It is a structural diagram of a second dust cup body of a specific embodiment;

[0034] Figure 8 A perspective view of a second dust collecting cup body according to a specific embodiment;

[0035] Fig. 9 It is a structural diagram of a third dust cup body of a specific embodiment;

[0036] Fig.10 A perspective view of a third dust cup body of a specific embodiment;

[0037] Fig.11 It is a cross-sectional view of a third dust cup body of a specific embodiment.

[0038] Reference numerals:

[0039] 1-pre-filter assembly; 101-exit of spiral channel; 11-outer cover; 111-dust outlet; 12-air guide plate; 13-filter cover; 131-sealed part; 132-filter part; 133-strip groove; 134-card; 14-casing; 15-dust shield; 2-post-filter assembly; 21-cover plate; 211-connecting port; 22-filter layer;

[0040] 3-side wall portion; 4-front end portion; 41-fluid inlet; 42-introduction pipe; 5-rear end cover; 51-fluid outlet; 6-dust storage area; 7-front cover body; 71-flow guide pipe. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0042] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or an integral connection, which can be a mechanical connection, or an electrical connection, which can be a direct connection, or can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] The terms "top", "bottom", "above", "lower", and "on" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0044] The common working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the embodiment of the present invention is placed on a horizontal plane and used on the horizontal plane, and "high and low" and "up and down" are defined in this way.

[0045] Embodiment 1

[0046] This embodiment provides a filtering unit such as Figure 1-Figure 11 As shown, it includes a pre-filter component 1 and a post-filter component 2. The post-filter component 2 is located behind the pre-filter component 1. After the dust-containing fluid is filtered and dust-removed by the pre-filter component 1, it is guided to the post-filter component 2 for the next step of filtration.

[0047] The pre-filter assembly 1 comprises an outer cover 11, an air guide plate 12 and a filter cover 13. The filter cover 13 is located inside the outer cover 11. The air guide plate 12 is located between the outer cover 11 and the filter cover 13 and forms a spiral channel together with the outer cover 11 and the filter cover 13. The fluid entering the pre-filter assembly 1 is first centrifugally filtered through the spiral channel, and after flowing out of the spiral channel, it is guided to the filter cover 13 for the next step of filtering.

[0048] The post-filter assembly 2 includes a cover plate 21 and a filter layer 22. The cover plate 21 is provided with a connecting port 211 for fluid circulation. The filter layer 22 is located inside the cover plate 21. The filter cover 13 is connected to the connecting port 211. The fluid filtered by the filter cover 13 is guided from the connecting port 211 to the filter layer 22 inside the cover plate 21 for the next step of filtration.

[0049] Specifically, the dust-containing fluid enters from the entrance of the spiral channel, and is centrifugally rotated in the spiral channel to perform the first step of filtration. In the first step of filtration, larger dust particles are separated under the action of centrifugation and discharged from the pre-filter assembly through the outlet 101 of the spiral channel; after the fluid is discharged from the outlet 101 of the spiral channel, it is guided to the filter cover 13 for the second step of filtration. In the second step of filtration, smaller dust particles will be filtered out by the filter cover 13 and discharged from the pre-filter assembly; after the fluid is discharged from the filter cover 13, it is guided to the filter layer 22 for the third step of filtration. The third step filters finer dust and / or harmful components (such as PM2.5, mites, formaldehyde, etc.) in the fluid.

[0050] It should be noted that the fluid guided out from the outlet 101 of the spiral channel flows toward the rear of the filter cover 13, ensuring that the fluid can be filtered in the second step. The material of the filter layer 3 is filter cotton or filter Hepa.

[0051] The outer cover 11 is a hollow structure. Specifically, the outer cover 11 is a hollow structure with an open rear end, and an air inlet is provided on the front end surface. The air inlet is sealed and connected with the entrance of the spiral channel, so as to ensure that the fluid flowing through the pre-filter assembly 1 can be centrifugally filtered through the spiral channel. The dust-containing fluid enters through the front end of the outer cover 11, and after centrifugal filtration through the spiral channel, large particles of dust are discharged from the rear end of the outer cover, and the fluid is guided to the rear of the filter cover 13 for the second step of filtration.

[0052] The rear end face of the outer cover body 11 is recessed toward the front end face to form a dust outlet 111, that is, the rear end face of the outer cover body 11 is provided with a dust outlet 111, and the dust outlet 111 is connected with the outlet 101 of the spiral channel to ensure that large particles of dust filtered out by centrifugation are smoothly discharged from the outer cover body 11.

[0053] In this embodiment, the outer cover body 11 is a cylindrical structure with both the front and rear ends open. The entrance of the spiral channel is the air inlet, and the dust outlet 111 extends from the top of the outer cover body 11 along one side of the side wall of the outer cover body 11 to the bottom of the outer cover body 11, and the outlet 101 of the spiral channel is located at the bottom of the outer cover body 11. The outlet 101 of the spiral channel is connected with the dust outlet 111, and the rear end face of the air guide plate 12 is connected to the lower edge of the dust outlet 111, ensuring that there is no obstruction between the outlet 101 of the spiral channel and the dust outlet 111, so that the dust filtered by the centrifugal filter and the dust filtered by the filter cover 13 quickly fall from the dust outlet 111 into the dust storage area of ​​the dust collecting cup.

[0054] The edges and corners of the dust outlet 111 adopt arc-shaped transitions to facilitate the passage of fluid, prevent dust from accumulating, and prevent the user from being scratched by the dust outlet 111 when using the pre-filter assembly 1.

[0055] The filter cover 13 is located inside 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 surfaces. The sealing portion 131, the outer cover body 11 and the air guide plate 12 form a spiral channel. The filter portion 132 does not participate in the formation of the spiral channel, ensuring that the spiral channel only centrifugally filters the dust-containing fluid, so that the pre-filter assembly can achieve graded filtration and have a better dust removal and filtration effect. The filter portion 132 is located behind the spiral channel. After the dust-containing fluid is centrifugally filtered through the spiral channel, it is guided to the filter portion 132 for the second step of filtration. The dust filtered out by the filter portion 132 falls into the dust storage area from the dust outlet 111.

[0056] The filter portion 132 is a hollow structure with an open rear end, and filter mesh holes are provided on the side walls of the filter portion 132. The rear end surface of the filter portion 132 is in sealing contact with the cover plate 21, and the rear port of the filter portion 132 is connected to the connecting port 211. After the dust-containing fluid is filtered through the filter mesh holes in the second step, it is guided from the rear port of the filter portion 132 to the filter layer 22 behind the cover plate 21 for the third step of filtration.

[0057] Since the fluid discharged from the spiral channel is not blown directly to the filter part 132 under the action of centrifugal guidance, in order to better introduce the fluid into the filter part 132, the filter mesh is set to have a certain inclination, and the inclination direction of the filter mesh is consistent with the spiral direction of the spiral channel, that is, the filter mesh is not perpendicular to the central axis of the filter part 132, and the inclination direction of the filter mesh is consistent with the flow direction of the fluid guided from the outlet 101 of the spiral channel to the filter part 132, so that the fluid can be introduced into the filter part 132 faster.

[0058] In this embodiment, the filter cover 13 is a tubular structure with a closed front end and an open rear end, and the filter cover 13 is coaxially arranged with the outer cover body 11, the front end face of the filter cover 13 is a closed structure, and its front end face is flush with the front end face of the outer cover body 11, and the rear end face of the filter cover 13 is an open opening, and its rear end face is flush with the rear end face of the outer cover body 11, and the fluid filtered by the filter cover 13 is discharged from its rear port. The sealing part 131 and the filter part 132 of the filter cover 13 are integrally formed, the sealing part 131 is a tube body with a closed front end face and side wall, the filter part 132 is a tube body with side walls covered with filter mesh holes and an open rear end, and the filter part 132 corresponds to the dust outlet 111, so that dust is discharged from the dust outlet 111, and the rear end of the filter part 132 is connected with the connecting port 211, that is, the rear end of the filter part 132 and the connecting port 211 have the same shape and size, so as to ensure that the fluid discharged from the rear end of the filter part 132 is quickly guided to the cover plate 21.

[0059] 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 surface of the filter part 132, ensuring that the dust centrifuged by the spiral channel and the dust filtered by the filter part 132 can be quickly discharged from the pre-filter assembly 1 from the dust outlet 111.

[0060] It should be noted that the sealing portion 131 adopts a solid structure to prevent the fluid from forming a vortex in the filter cover 13 and quickly being discharged from the rear end of the filter cover 13 .

[0061] In order to ensure the filtering effect of the filter cover 13 on the fluid, the rear end face of the outer cover body 11 (excluding the rear end face forming the dust outlet 111) is sealed and connected to the cover plate 21 to prevent the fluid discharged from the spiral channel and guided to the filter part 132 from flowing away from the gap between the rear end face of the outer cover body 11 and the cover plate 21, thereby affecting the filtering effect of the filter part 132 on the fluid and avoiding the formation of a cyclone in the dust storage area.

[0062] The air guide plate 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 guide plate 12 is a spiral plate, which spirally extends from the front end surface of the outer cover body 11 along the central axis of the filter cover 13 to the dust outlet 111, thereby configuring the cavity between the filter cover 13 and the outer cover body 11 into a spiral channel, that is, the inner spiral side edge of the spiral plate is sealed with the outer side wall of the filter cover 13, the outer spiral side edge of the spiral plate is sealed with the inner side wall of the outer cover body 11, and the front end surface of the spiral plate is flush with the front end surfaces of the outer cover body 11 and the filter cover 13.

[0063] After the dust-containing fluid enters the pre-filter assembly 1 from the front end face of the outer cover body 11, it is guided by the spiral plate, centrifugally rotates around the filter cover 13, and is guided by the front end face of the outer cover body 11 to the dust outlet 111. In this process, when the larger particles in the dust-containing fluid approach the dust outlet 111, they are directly thrown out of the pre-filter assembly 1 and fall into the dust storage area under the action of centrifugation; the smaller particles in the dust-containing fluid are guided along with the fluid to the filter part 132 of the filter cover 13, and fall into the dust storage area from the dust outlet 111 after being filtered by the filter mesh; and the fluid after two-step filtration and dust removal is discharged from the pre-filter assembly 1 from the rear port of the filter part 132, and then guided by the connecting port 211 to the filter element 22 on the rear side of the cover plate 21 for the third step of filtration.

[0064] It should be noted that the central angle of the spiral plate is α, α≥360°, that is, the number of spiral turns of the spiral plate around the central axis of the filter cover 13 is at least one circle, so that the spiral plate has a good spiral guiding effect on the dust-containing fluid, and improves the effect of centrifugal dust removal in the spiral channel. However, the central angle of the spiral plate should not be too large, so as not to cause the dust-containing fluid to pass through the spiral channel for too long, reduce the filtration rate of the pre-filter component 1, and large particles of dust may be retained in the channel due to the excessive length of the spiral channel, which is not conducive to dust discharge, and even worse, cause the channel to be blocked, affecting the flow of fluid, therefore, α<720°, in short, 360°≤α<720°.

[0065] In this embodiment, α=400°, the rear end face of the spiral plate faces the dust outlet 111 and is connected to the bottom edge of the dust outlet 111, so that after large particles of dust are discharged from the spiral channel, they fall directly from the dust outlet 111 into the dust storage area under the action of gravity.

[0066] In order to improve the stability of the filter cover 13 and to facilitate the replacement and maintenance of the filter cover 13, a sleeve 14 is sleeved on the outside of the filter cover 13. Specifically, the sleeve 14 is sleeved on the outside of the closed 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 of the sleeve 14, and the filter cover 13 is connected to the sleeve 14 in a detachable manner.

[0067] In this embodiment, the sleeve 14 is a cylindrical structure with a closed front end and an open rear end. The filter cover 13 is detachably sleeved in the sleeve 14, and the outer diameter of the filter cover 13 is equal to the inner diameter of the sleeve 14, so that the filter cover 13 is stable and does not shake in the sleeve 14. Since the inner wall of the sleeve 14 and the outer wall of the filter cover 13 are tightly fitted together, in order to facilitate the removal of the filter cover 13, a strip groove 133 is provided on the outer wall of the filter cover 13. The strip groove 133 extends from the front end of the outer wall of the filter cover 13 to the rear end. The strip groove 133 is a linear groove, and the straight line is parallel to the central axis of the filter cover 13. In this embodiment, three strip grooves 133 are provided on the outer wall of the filter cover 13, and are evenly distributed on the outer wall of the filter cover 13.

[0068] In order to prevent the filter cover 13 from detaching from or loosening from the sleeve 14 during the use of the pre-filter assembly 1, a clamping plate 134 is provided in the strip groove 133. The clamping plate 134 can slide in the strip groove 133. The clamping plate 134 can be clamped between the filter cover 13 and the sleeve 14 to fix the filter cover 13 in the sleeve 14, so that the filter cover 13 is not easily detached from or loosened from the sleeve 14. When the filter cover 13 is removed from the sleeve 14, an external force is applied to the clamping plate 134 to slide it out from between the filter cover 13 and the sleeve 14, so that the filter cover 13 can be taken out of the sleeve 14.

[0069] In this embodiment, the sleeve 14, the air guide plate 12 and the outer cover 11 are integrally formed, so that the pre-filter assembly 1 has good stability.

[0070] It should be noted that, when the front filter assembly 1 includes a sleeve 14, the filter cover 13 can remove the sealing portion 131 and only provide the filter portion 132. At this time, the front end face 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 connected to the rear end of the sleeve 14 in a detachable manner such as a threaded connection or a snap connection to facilitate replacement and maintenance of the filter portion 132. At this time, the sleeve 14 can also adopt a solid structure.

[0071] In order to further prevent the dust in the dust storage area from being directed to the dust outlet 111 again, the pre-filter assembly 1 further includes a dust shield 15, which is located at the bottom of the outer cover 11 and is arranged along the central axis of the outer cover 11, so as to prevent the generation of a cyclone in the dust storage area in the dust cup body, and effectively prevent the dust in the dust storage area from being directed to the dust outlet 11 along with the cyclone. In this embodiment, the dust shield 15 is arranged in the following three structures:

[0072] (1) The dust shield 15 is an inclined plate. Specifically, the inclined plate is located at the bottom end surface of the outer cover 11, and the inclined plate is inclined toward the direction where the dust outlet 111 is located, that is, the angle between the plane where the inclined plate is located and the plane where the bottom end surface of the outer cover 11 is located is β, and β is an acute angle, specifically, 45°≤β<90°. In this embodiment, Figure 1 As shown, β=75°, the length of the inclined plate is equal to the distance from the front edge of the dust outlet 111 to the front end face of the outer cover body 11, and the front and rear ends of the inclined plate are flush with the front end face of the outer cover body 11 and the front edge of the dust outlet 111, respectively. In this way, the inclined plate can effectively prevent the dust in the dust storage area from being guided to the dust outlet 111, so that the dust can be retained in the dust storage area.

[0073] (2) The dust shield 15 is an inclined plate. Specifically, the inclined plate is located at the bottom end surface of the outer cover 11, and the inclined plate is inclined toward the direction where the dust outlet 111 is located, that is, the angle between the plane where the inclined plate is located and the plane where the bottom end surface of the outer cover 11 is located is β, and β is an acute angle, specifically, 45°≤β<90°. In this embodiment, Figure 2 As shown, β = 75°, the length of the inclined plate is equal to 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), that is, the front and rear ends of the inclined plate are flush with the front and rear end faces of the outer cover body 11, respectively, and the inclined plate is connected to the bottom edge of the dust outlet 111. In this way, the inclined plate can not only effectively prevent the dust in the dust storage area from being guided to the dust outlet 111, so that the dust can be retained in the dust storage area, but also can quickly guide the dust discharged from the dust outlet 111 to the dust storage area. 45°≤β<90°, while the inclined plate quickly guides the dust to the dust storage area, it will not hinder the dust outlet 111 from discharging dust due to the small angle, causing the dust to be retained in the front cover body 11.

[0074] (3) The dust shield 15 is a vertical plate. Specifically, the vertical plate is located at the bottom front end of the outer cover 11, and the vertical plate is perpendicular to the bottom end surface of the outer cover 11, that is, the central axis of the outer cover 11 is located in the plane where the vertical plate is located. Figure 3 As shown, the distance from the dust outlet 111 to the front end face of the outer cover body 11 (i.e., the distance from the frontmost edge of the dust outlet 111 to the front end face of the outer cover body 11) is S, the length of the vertical plate is L, S / 3≤L≤S, and by setting the vertical plate, which is located in the dust storage area, it can effectively prevent the formation of a cyclone in the dust storage area, and can block the dust in the dust storage area from being guided to the dust outlet 111, so that the dust can be retained in the dust storage area.

[0075] The filter assembly provided in this embodiment has at least one of the following beneficial effects:

[0076] (1) The pre-filter assembly is provided with a spiral channel, so that the dust-containing fluid can be centrifugally rotated during the conduction process, realizing centrifugal filtration and dust removal, thereby reducing the working pressure of the filter cover on the dust-containing fluid filtration;

[0077] (2) The pre-filter assembly effectively separates the filter cover from the dust storage area of ​​the dust cup body by providing an outer cover body to prevent the dust in the dust storage area from being directed to the filter cover again, thereby reducing the working pressure of the pre-filter assembly;

[0078] (3) The filter cover includes a sealing part and a filtering part. The sealing part, the outer cover body and the air guide plate form a spiral channel. The fluid discharged from the spiral channel is guided to the filtering part. After the dust-containing fluid is centrifugally rotated in the spiral channel, large dust particles are centrifugally filtered and then thrown out of the pre-filter component from the dust outlet. After the dust-containing fluid is further filtered through the filtering part, small dust particles are filtered and then discharged from the pre-filter component from the dust outlet, so that the pre-filter component can achieve graded filtration, and the dust removal and filtration effect is significantly improved;

[0079] (4) A dust shield is provided at the bottom of the outer cover body to prevent a cyclone from being generated in the dust storage area in the dust collecting cup body, and effectively prevent the dust in the dust storage area from being guided to the dust outlet by the cyclone;

[0080] (5) After the dust-laden fluid enters the filter unit through the fluid inlet, it undergoes three-stage filtration through the spiral channel, filter section, and filter layer. The three are relatively independent of each other and filter dust of different particle sizes in the dust-laden fluid, so that the filter unit can achieve graded filtration of the dust-laden fluid, and the filtration effect is significantly improved.

[0081] Embodiment 2

[0082] This embodiment provides a dust collecting cup body, such as Figure 5-Figure 11 As shown, it includes the filter unit and dust cup provided in Example 1, and the filter unit is located in the dust cup.

[0083] The dust cup is provided with a fluid inlet 41 and a fluid outlet 51 for fluid in and out, the inlet of the spiral channel is connected to the fluid inlet 41, and the cover plate 21 is connected to the fluid outlet 51. After the dust-containing fluid enters the dust cup from the fluid inlet 41, it is filtered in three steps by the filter unit and then discharged from the dust cup from the fluid outlet 51.

[0084] The dust cup includes a side wall portion 3, a front end portion 4 and a rear end cover 5. Specifically, the front end portion 4 is located in front of the side wall portion 3, and the rear end cover 5 is arranged at the rear end of the side wall portion 3. The front end portion 4 is provided with a fluid inlet 41, and the rear end cover 5 is provided with a fluid outlet 51. The dust-containing fluid enters the dust cup body from the fluid inlet 41, and is discharged from the dust cup body from the fluid outlet 51 after being filtered and dust removed. Therefore, a sealing connection is adopted between the front end portion 4 and the side wall portion 3, and between the rear end cover 5 and the side wall portion 3, so that the fluid can only enter and exit the dust cup body from the fluid inlet 41 and the fluid outlet 51.

[0085] In this embodiment, the side wall portion 3 and the front end portion 4 are integrally formed, and the rear end cover 5 is detachably mounted on the rear end of the side wall portion 3, so as to facilitate the removal, replacement and maintenance of the filter unit and the cleaning of dust in the dust cup.

[0086] The pre-filter assembly 1 is limited between the front end portion 4 and the cover plate 21. Specifically, the front end face of the outer cover body 11 is sealed and connected to the front end portion 4, and the spiral channel inlet is connected to the fluid inlet 41, ensuring that the fluid entering the dust cup body from the fluid inlet 41 can flow into the pre-filter assembly 1 for filtering and dust removal; the cover plate 21 is sealed and connected to the rear end cover 5, and together they enclose an assembly cavity for assembling the filter layer 22. The shape of the filter layer 22 is adapted to the assembly cavity, so that all fluids flowing into the assembly cavity from the connecting port 211 are filtered by the filter layer 22 and then discharged from the fluid outlet 51.

[0087] The inner wall of the side wall portion 3, the outer wall of the outer cover body 11, the cover plate 21 and the front end portion 4 together enclose a dust storage area 6 of the dust collecting cup body.

[0088] In this embodiment, the top of the outer wall of the outer cover 11 contacts the top of the outer wall of the side wall 3, so that the dust storage area 6 is located below the outer cover 11, which is convenient for storing dust. Correspondingly, the position of the connecting port 41 is also located above the center of the cover plate 21, which is compatible with the position of the rear port of the filter cover 13.

[0089] After the dust-containing fluid enters the dust collecting cup from the fluid inlet 41, it first undergoes the first step of centrifugal filtration through the spiral channel, and large particles of dust are thrown out of the filter assembly and fall into the dust storage area. After the fluid is discharged from the spiral channel, it is guided to the filter part 132. After the filter part 132 filters the fluid for the second step, small particles of dust fall into the dust storage area. The fluid is guided from the rear port of the filter part 132 to the filter layer 22 in the cover plate 21. After the filter layer 22 performs the third step of filtration on the fluid, the fluid is discharged from the fluid outlet 51. In this way, the dust collecting cup can achieve three-stage filtration of the inflowing dust-containing fluid, and has an excellent dust removal effect.

[0090] The rear end cover 5 is detachably connected to the side wall portion 3 , which is convenient for taking, replacing, and maintaining the cover plate 21 , the filter layer 22 , and the filter assembly 1 , and is also convenient for cleaning the dust in the dust storage area 6 .

[0091] In order to more conveniently clean the dust in the dust storage area 6, a cleaning port for dumping dust is provided at the bottom or side wall of the side wall portion 3, and a cover plate that is adapted thereto and can be opened and closed is provided on the cleaning port, and the cover plate is located on the outside of the side wall portion 3, and the cover plate and the cleaning port are sealed to ensure the sealing of the dust cup body. The cover plate can be covered on the cleaning port by a snap fastener, a sliding member, etc. When it is necessary to clean the dust in the dust storage area 6, the cover plate is opened or slid open, the dust is dumped out through the cleaning port, and then the cover plate is covered or slid back onto the cleaning port.

[0092] In order to better introduce the dust-containing fluid into the dust collecting cup, an inlet pipe 42 is provided on the fluid inlet 41 of the front end 4. The front end of the inlet pipe 42 is an inclined end, and the rear end face of the inlet pipe 42 is sealed and connected to the front end 4, that is, the rear port of the inlet pipe 42 is connected to the fluid inlet 41, so that the dust-containing fluid flows into the spiral channel through the guidance of the inlet pipe 42.

[0093] The dust cup body also includes a front cover body 7, and a detachable cover of the front cover body 7 is arranged on the side of the front end portion 4 away from the side wall portion 3. The front cover body 7 is provided with a guide pipe 71 connected to the inlet pipe 42. The outlet of the guide pipe 71 is adapted to the front port of the inlet pipe 42, that is, the outlet of the guide pipe 71 is an inclined port, and the dust-containing fluid is guided to the inlet pipe 42 through the guide pipe 71, so that the structure of the dust cup body is more stable and the fluid circulation is smoother.

[0094] In order to increase the flow rate of the dust-containing fluid when it enters the filter assembly 1, the inlet aperture of the guide pipe 71 is larger than the outlet aperture, that is, the guide pipe 71 is a tapered pipe, so as to effectively increase the flow rate of the dust-containing fluid entering the filter assembly 1, thereby increasing the centrifugal force of the fluid in the spiral channel, so that the filter assembly has a better centrifugal dust removal effect.

[0095] In order to improve the connection performance between the pre-filter assembly 1 and the dust cup, the outer cover body 11 is detachably connected to the dust cup. Specifically, the outer cover body 11 is detachably connected to the side wall portion 3 by a slide block, a slot block, etc. to improve the stability of the dust cup body.

[0096] Compared with the prior art, the beneficial effects of the dust cup provided in this embodiment are basically the same as the beneficial effects of the filter unit provided in Embodiment 1, and will not be described one by one here.

[0097] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A filter unit, characterized in that: It comprises a pre-filter component (1) and a post-filter component (2); The pre-filter assembly (1) comprises an outer cover body (11), an air guide plate (12) and a filter cover (13), wherein a spiral channel is formed between the air guide plate (12), the outer cover body (11) and the filter cover (13); The post-filter assembly (2) comprises a cover plate (21) and a filter layer (22); the cover plate (21) is provided with a communication port (211) for fluid circulation; The fluid entering the filter unit is first centrifugally rotated through the spiral channel for a first step of filtration, the fluid is discharged from the outlet (101) of the spiral channel and then directed to the filter cover (13) for a second step of filtration, and the fluid is discharged from the filter cover (13) and then directed to the filter layer (22) for a third step of filtration; The filter cover (13) is located inside the outer cover body (11), and the air guide plate (12) is located between the outer cover body (11) and the filter cover (13); The outer cover (11) is a hollow structure with an open rear end, and an air inlet is provided on the front end surface of the outer cover (11), the air inlet being connected to the entrance of the spiral channel; The rear end face portion of the outer cover body (11) is recessed towards the front end face to form a dust outlet (111), and the dust outlet (111) is connected to the outlet (101) of the spiral channel; The pre-filter assembly (1) further comprises a dust shield (15), wherein the dust shield (15) is located at the bottom of the outer cover (11); the dust shield (15) is arranged along the central axis direction of the outer cover (11); The dust shield plate (15) is an inclined plate, the angle between the inclined plate and the bottom end surface of the outer cover body (11) is an acute angle, and the inclined plate is inclined toward the dust outlet (111) of the outer cover body (11); The front and rear ends of the inclined plate are respectively flush with the front and rear end surfaces of the outer cover body (11).

2. The filter unit according to claim 1, characterized in that The filter layer (22) is located inside the cover plate (21).

3. The filter unit according to claim 1, characterized in that The filter cover (13) comprises a sealing portion (131) and a filter portion (132); The spiral channel is formed between the sealing portion (131), the outer cover (11) and the air guide plate (12); The filter portion (132) is a hollow structure with an open rear end, and filter mesh holes are provided on the side wall of the filter portion (132), and the rear port of the filter portion (132) is in communication with the communication port (211).

4. A dust collecting cup, characterized in that: The filter comprises the filter unit according to any one of claims 1 to 3.

Images