CN213405895U - Filter assembly and dust box unit - Google Patents

Abstract

The utility model discloses a filter assembly and dust box unit, which comprises an inner layer filter cartridge and an outer layer filter cartridge, wherein one end of the inner layer filter cartridge is provided with an annular installation part, the outer layer filter cartridge is sleeved outside the inner layer filter cartridge, and the open part of the outer layer filter cartridge is connected to the annular installation part through a detachable structure; one end of the dust box is open, the filter assembly is integrally plugged into an inner cavity of the dust box in an inward mode, and the outer wall of the annular mounting part is clamped on the inner wall of the open end of the dust box; consequently, inside and outside two-layer cartridge filter has realized reciprocal anchorage, avoids separating or misplacing because of the influence of gravity, has guaranteed filtering component's normal use, and annular installation department has still realized the whole being connected with the dirt box of filtering component simultaneously, and connection structure is simple easy to operate, and the user uses easy dismounting laborsaving.

Description

Filter assembly and dust box unit

Technical Field

The utility model relates to a dust catcher technical field especially relates to a hand-held type cleaning device's dirt box unit.

Background

The hand-held vacuum cleaner is used for household cleaning due to the advantages of small volume, light total weight and convenient carrying and use.

Handheld dust catcher mainly includes host computer and dirt box unit, and the during operation makes the inside negative pressure that generates of dirt box unit and produces suction through the dust absorption motor in the host computer to inhale the air that will include dust or foreign matter through the suction nozzle, and with dust, impurity and air separation through stretching into the inside air filter who inhales dirt box unit, then the air that will handle is discharged at the air outlet through setting up, and dust, impurity are concentrated in the dirt box unit.

The hand-held cleaning equipment with the publication number of CN104172986A comprises a dust cylinder, a filtering device and a separating device, wherein the dust cylinder is arranged below the separating device, and the filtering device is arranged above the separating device. There are also hand-held cleaning devices like CN102755135A, etc.

The inventor designs a novel hand-held type cleaning device, and among this type of hand-held type cleaning device, built-in dirt box that has filter assembly is installed at the front end of host computer, and the back end of host computer is the portion of gripping, and the front end of dirt box is equipped with the dust absorption mouth.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a dirt box unit convenient to it is clean is provided, further provide the hand-held type cleaning device who has above-mentioned dirt box unit.

The utility model provides a technical scheme that above-mentioned technical problem provided does: the filter assembly is arranged on a dust box of the handheld cleaning equipment and comprises an inner layer filter cartridge and an outer layer filter cartridge, wherein one end of the inner layer filter cartridge is provided with an annular installation part, the outer layer filter cartridge is sleeved outside the inner layer filter cartridge, and the open part of the outer layer filter cartridge is connected to the annular installation part through a detachable structure.

The utility model discloses further optimized technical scheme does: the annular installation part comprises a first annular body and a second annular body which are distributed in a step-shaped manner, the inner layer filter cylinder is connected with the first annular body, the opening part of the outer layer filter cylinder is sleeved outside the first annular body, and the end face of the opening part abuts against the second annular body.

The utility model discloses further optimized technical scheme does: the outer cartridge filter include the tube-shape support and arrange the filter screen on the tube-shape support, detachable structure set up in tube-shape support and first ring body between.

The utility model discloses further optimized technical scheme does: the inner layer filter cartridge comprises a plastic chassis and a cylindrical HEPA filter element with one end sealed by the plastic chassis, and the open end of the cylindrical HEPA filter element is connected to the first annular body.

The utility model discloses further optimized technical scheme does: the detachable structure including locate on the outer wall of first ring body along at least one arc smooth muscle of circumference distribution and at least one arc spout of tube-shape support inner wall, the smooth muscle card of arc go into the arc spout in to fix the outer cartridge filter outside the inlayer cartridge filter.

The utility model discloses further optimized technical scheme does: the outer wall of the annular mounting part extends outwards to form a deformable first sealing ring; the inner wall of the air outlet in the center of the annular mounting part extends outwards to form a deformable second sealing ring.

The utility model discloses further optimized technical scheme does: the plastic chassis is provided with a wrapping edge wrapped on the outer side of the cylindrical HEPA filter element. The plastic chassis and the cylindrical HEPA filter element insert are integrally molded by injection.

The utility model discloses further optimized technical scheme does: the inner hole of the annular installation part is internally provided with a handle part, and the handle part is used for separating the filtering component from the dust box.

The utility model discloses a another protection topic does: the dirt box unit includes filtering component and dirt box, the one end of dirt box open, filtering component with inwards in the mode is wholly filled in the inner chamber of dirt box, the outer wall card of annular installation department in the dirt box open on the end inner wall.

The utility model discloses further optimized technical scheme does: the inner wall of the opened end of the dust box is provided with an annular boss, and the outer wall of the annular mounting part is placed on the annular boss.

Compared with the prior art, the utility model has the advantages that one end of the inner layer filter cartridge is provided with an annular installation part for being placed on the dust box, the outer layer filter cartridge is sleeved outside the inner layer filter cartridge, the open part of the outer layer filter cartridge is connected to the annular installation part through a detachable structure, so that the inner layer filter cartridge and the outer layer filter cartridge are mutually fixed through the annular installation part, the separation or dislocation caused by the influence of gravity between the two layers is avoided, the normal use of the filter assembly is ensured, the disassembly and the assembly between the two layers are convenient, and the replacement and the cleaning of the filter assembly are facilitated; meanwhile, the annular installation part also realizes the connection of the whole filter assembly and the dust box, the connection structure is simple and easy to operate, and the user can use the dust box conveniently and labor-saving.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a first schematic view of a hand-held cleaning device according to a preferred embodiment of the present invention;

FIG. 2 is a second schematic view of a hand-held cleaning device in accordance with a preferred embodiment of the present invention;

FIG. 3 is an exploded view of a hand-held cleaning device in accordance with a preferred embodiment of the present invention;

FIG. 4 is a second exploded view of the hand-held cleaning device in accordance with a preferred embodiment of the present invention;

FIG. 5 is a diagram illustrating a state of use of the hand-held cleaning device in accordance with a preferred embodiment of the present invention;

FIG. 6 is a schematic view of a hand-held cleaning body according to a preferred embodiment of the present invention;

FIG. 7 is an exploded view of a hand-held cleaning body according to a preferred embodiment of the present invention;

fig. 8 is an exploded view of a hand-held cleaning body according to a preferred embodiment of the present invention;

fig. 9 is a schematic perspective view of a main dust suction unit according to a preferred embodiment of the present invention;

fig. 10 is a first schematic view of a dust box unit according to a preferred embodiment of the present invention;

fig. 11 is a second schematic view of a dust box unit according to a preferred embodiment of the present invention;

fig. 12 is a third schematic view of a dust box unit according to a preferred embodiment of the present invention;

fig. 13 is an exploded view of a first dust box unit according to a preferred embodiment of the present invention;

fig. 14 is an exploded view of a second dust box unit according to a preferred embodiment of the present invention;

FIG. 15 is a first schematic view of a filter assembly according to a preferred embodiment of the present invention;

FIG. 16 is a second schematic view of a filter assembly according to a preferred embodiment of the present invention;

fig. 17 is an exploded view of a filter assembly according to a preferred embodiment of the present invention;

fig. 18 is a schematic view of an inner filter cartridge according to a preferred embodiment of the present invention;

fig. 19 is a schematic view of an outer filter cartridge according to a preferred embodiment of the present invention;

fig. 20 is a perspective view of a dust box according to a preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 8, the handheld cleaning device includes a handheld cleaning main body 100 and a cup-shaped protective cover 200, the handheld cleaning main body 100 includes a dust suction main body 101 and a dust box unit 102 having a filter assembly 05 built therein, and the dust box unit 102 is installed at a front end of the dust suction main body 101.

As shown in fig. 1-4, the cup-shaped protecting cover 200 is composed of a bottom portion 201 with a supporting plane S and a peripheral portion 202, the bottom portion 201 and the peripheral portion 202 form an accommodating chamber K with an upward opening, and the dust box unit 102 of the handheld cleaning main body 100 is inserted downwards into the accommodating chamber K, so that the whole handheld cleaning device can be stably and vertically placed on any flat plane through the supporting plane S.

Moreover, the cup-shaped protective cover 200 covers the front end of the handheld cleaning main body 100 to form a relatively integral and smooth handheld cleaning device. The cup-shaped protective cover 200 protects the front of the hand-held cleaning main body 100 from being damaged by collision or scratch, and prevents external dust from being deposited on the outer surface of the front of the hand-held cleaning main body 100.

As shown in fig. 6 to 8, the handheld cleaning main body 100 of the handheld cleaning device provided in this embodiment includes a dust box unit 102 and a dust suction main body 101 which are connected back and forth along the same axis. The main dust collection unit 101 includes a cylindrical housing 01, a rechargeable battery 02, and an air suction motor 03. The cylindrical housing 01 is divided into a front cylindrical housing 011 and a rear cylindrical housing 012 on the same axis according to the position of the front and rear sections, the suction motor 03 is located in the front cylindrical housing 011 to form a dust suction unit 111 of the device, the rear cylindrical housing 012 is a holding part 112 of the device, and the charging battery 02 is arranged in the holding part 112.

Through the arrangement, the handheld cleaning equipment integrally forms a rod-shaped part, so that a user can use the equipment to clean more conveniently, and the appearance of the equipment is smooth and beautiful. In addition, the great motor 03 that induced drafts of weight is close to the portion of gripping 112, and rechargeable battery 02 is located the portion of gripping 112 for the weight of whole equipment is concentrated on the equipment rear portion, and the focus is closer to the user more, and consequently the overall arrangement of equipment is more reasonable, and it is laborsaving to relax more when user's handheld device cleans.

As shown in fig. 2, more specifically, the handheld cleaning main body 100 is provided with a charging interface C, and in the present embodiment, the charging interface C is disposed on a lower surface F2 of the dust collection main body 101, and a user can charge the charging interface C according to a use condition. And preferably, the cruising ability of the handheld cleaning equipment in the technical scheme can be matched according to the actually required cleaning space area, and the technical means is realized by equipping batteries with different cruising abilities.

As shown in fig. 6 to 8, it is preferable that the front cylindrical housing 011 and the rear cylindrical housing 012 are each cylindrical or truncated cone-shaped, and the outer diameter of the front cylindrical housing 011 is larger than the outer diameter of the rear cylindrical housing 012, that is, the maximum outer diameter of the grip portion 112 is smaller than the minimum outer diameter of the dust suction unit 111. This is to make the outer diameter of the grip portion 112 more suitable for the hand structure of the human body, and to facilitate the user to use the cleaning device.

Specifically, the dust box unit 102 includes a dust box 04 and a filter assembly 05 built in the dust box 04. The dust collection nozzle part 1 is provided at the front end of the dust box 04, and the dust collection opening 001 of the dust collection nozzle part 1 is formed at the front end opening of the dust box 04. The rear end of the dust box 04 is connected to the front end of the dust collection main body 101. An air inlet 3 is arranged on the front end face of the dust collection main machine 101, an air outlet 2 is arranged on the rear end of the dust box 04, and when the dust box unit 102 is assembled on the dust collection main machine 101, the air outlet 2 is in butt joint with the air inlet 3.

As shown in fig. 1, 2 and 6, preferably, the upper surface F1 of the main dust suction machine 101 is provided with at least one of a switch button 4 and a function button 5 for controlling the suction fan. It should be understood that the switch buttons 4 and the function buttons 5 may be provided in a push-to-activate type or a touch-to-activate type. In this embodiment, the upper surface F1 of the main dust collector 101 is provided with a switch button 4 for turning on and off the suction fan and a function button 5 for adjusting the gear of the suction fan.

As shown in fig. 6 and 7, the rear end of the dust box 04 is detachably mounted on the front end of the dust collection main body 101 by a rotary positioning structure; when the dust box unit 102 is fitted to the use state, the dust suction port 001 is inclined downward away from the upper surface F1 of the housing of the dust suction main body 101.

Therefore, when in use, the user holds the holding part 112 to incline the handheld cleaning device at a certain angle with the surface to be cleaned, and at this time, the dust box unit 102 is located below, and the dust suction opening 001 of the dust suction nozzle part 1 can be horizontally attached to the surface to be cleaned, so that the user can push the device conveniently, the action area of the dust suction opening 001 is as large as possible, and the dust suction effect of the device is ensured. Meanwhile, the switch button 4 and the function button 5 are located on the upper surface of the dust collection host 101, so that when a user grips the equipment with one hand, the thumb can press the switch to realize control while cleaning, operation is more convenient and easier, and experience feeling is better.

In other words, as shown in fig. 10 and 11, the dust suction opening 001 intersects the dust box upper surface 041 to form an upper edge 002, and intersects the dust box lower surface 042 to form a lower edge 003, and the upper edge 002 is located forward of the lower edge 003 in the axial direction, so that the dust suction opening 001 is inclined downward away from the upper surface F1 of the housing of the dust suction main unit 101.

As shown in fig. 2, preferably, the lower surface F2 of the front cylindrical housing 011 of the dust suction unit 111 is provided with an air outlet 6, and a noise reduction sponge is provided inside the air outlet 6. The air outlet 6 is arranged on the lower surface, so that hot air blown out of the dust suction unit 111 is prevented from directly facing a user, the use comfort of the equipment is improved, and the noise of the equipment is reduced due to the use of the noise reduction sponge.

In the technical scheme, the outer surface of the front cylindrical shell 011 at the position of the air outlet 6 is in a grid shape or a mesh shape, and the grid-shaped or mesh-shaped outer surface can prevent foreign matters from accidentally falling into the air outlet 6, so that the aim of protecting the air outlet 6 is fulfilled.

As shown in FIGS. 10-12, the dirt box upper surface 041 preferably extends obliquely downward to an upper edge 002 and the dirt box lower surface 042 preferably extends obliquely upward to a lower edge 003. The upper surface 041 and the lower surface 042 of the dust box are plane or curved. The outer contour of the dust box 04 is gradually reduced from back to front, so that the front end of the dust box 04 forms a fish mouth-like shape, and the dust suction mouth part 1 is positioned at the fish mouth shape. The dust suction nozzle portion 1 includes a nozzle cavity M recessed from the dust suction opening 001 toward the inside of the dust box 04, and a dust inlet 004 formed in a rear wall of the nozzle cavity M, in addition to the dust suction opening 001 located at the foremost end of the dust box 04.

Wherein, the nozzle chamber M includes an upper wall 005 extending inward from an upper edge 002 of the dust suction port 001, a lower wall 006 extending inward from a lower edge 003 of the dust suction port 001, and side walls 007 at both sides, the upper wall 005 and the lower wall 006 being parallel to the central axis of the apparatus. Further, it is preferable that a dust blocking sheet 7 whose airflow can be opened is provided on the inner side of the dust inlet 004. The dust-blocking sheet 7 can prevent excessive debris or hard objects from accidentally entering the dust box 04, and prevent the dust box 04 from being overloaded or the filter assembly 05 of the dust box 04 from being damaged.

In actual use, a user holds the holding portion 112 of the hand-held cleaning device with the dust box unit 102 down with one hand, so that the device is inclined at an acute angle to the surface to be cleaned, and the dust suction opening 001 of the dust suction nozzle portion 1 can be horizontally attached to the surface to be cleaned. Then, the switch button 4 is pressed by a thumb to turn on the device, the suction fan of the dust suction unit 111 operates to form a negative pressure in the airflow chamber at the front side thereof, so that dust and foreign matters on the surface to be cleaned are sucked in from the dust suction port 001 together with the outside air, and flow through the nozzle chamber M, are filtered by the first pass of the dust blocking sheet 7, and then enter the dust box unit 102 for filtering. The clean air filtered by the filter assembly 05 flows from the air outlet 2 of the dust box unit 102 to the air inlet 3 of the suction fan and finally flows back to the external environment again from the air outlet 6 of the device, while the dust and foreign objects are retained in the dust box 04.

As shown in fig. 5, in addition, other different dust-absorbing accessories can be inserted into the dust-absorbing opening 001 to complete different cleaning works, such as cleaning the floor by matching with a floor brush, cleaning a sofa surface, a bed sheet, a curtain and the like by matching with a flat hairbrush Y, and removing dust at small corners and dirt in some household appliances and adsorbing sewage by matching with a small suction nozzle.

As shown in fig. 9 to 12, as a specific embodiment of the connection structure between the dust box unit 102 and the dust collection main unit 101, in this embodiment, the rear end of the dust box 04 is provided with the connection portion 8, the front end of the dust collection main unit 101 is provided with the connection cavity 9, and the connection portion 8 is inserted into the connection cavity 9 to connect the two. The dust box unit 102 and the dust collection host 101 are stably connected through the rotary positioning structure, the positioning is more accurate, and the dismounting process is simple and convenient.

Specifically, the rotary positioning structure comprises a protruding piece 81 on the outer wall of the connecting part 8 and a notch 82 on the inner wall of the connecting cavity 9, and the notch 82 can be matched with the protruding piece 81 and rotate. The notch 82 includes a guide groove 82a and a positioning groove 82b, the guide groove 82a extends outward to the outer edge of the connection chamber 9, the positioning groove 82b communicates with the guide groove 82a, the connection portion 8 is inserted into the connection chamber 9 and rotated at a certain angle, and the protrusion 81 is rotated through the guide groove 82a into the positioning groove 82b and positioned at the root of the positioning groove 82 b.

The specific structure of the dirt box unit 102 is described in connection with FIGS. 13-20: the dust box unit 102 includes a filter assembly 05 and a dust box 04, one end of the dust box 04 is open, and the filter assembly 05 is integrally inserted into an inner cavity of the dust box 04 in an inward manner. This makes filter assembly 05 pull out to insert and installs in dirt box 04, has saved the use of fastener, makes the installation more convenient, and the dismouting is more convenient light, and filter assembly 05's clean change is more laborsaving.

As shown in fig. 17, the filter assembly 05 includes an inner filter cartridge 051 and an outer filter cartridge 052. In the traditional technology, the inner layer filter cartridge 051 and the outer layer filter cartridge 052 are sleeved, but are not fixedly connected with each other and can be freely separated. And when the hand-held type cleaning device that this embodiment provided used, dirt box 04 orientation, if inner filter cartridge 051 and outer filter cartridge 052 are unfixed each other, when the operation, because of the influence of gravity, the inside and outside two-layer of filter component 05 will separate and drop or misplace to influence filter component 05's normal use.

As shown in fig. 15 to 18, in this embodiment, an annular mounting portion 10 is provided at one end of the inner filter cartridge 051, the outer filter cartridge 052 is sleeved outside the inner filter cartridge 051, the open portion of the outer filter cartridge 052 is detachably coupled to the annular mounting portion 10, and the outer wall of the annular mounting portion 10 is caught on the inner wall of the open end of the dust box 04. Therefore, the inner and outer layers of filter cartridges are fixed with each other through the annular mounting part 10, and separation or dislocation caused by gravity influence between the inner and outer layers of filter cartridges is avoided; meanwhile, the annular mounting part 10 also realizes the connection of the whole filtering component 05 and the dust box 04, and the structure is simple and the assembly and disassembly are convenient.

Preferably, as shown in fig. 20, the inner wall of the open end of the dust box 04 is provided with an annular boss 11, and the outer wall of the annular mounting portion 10 of the filter assembly 05 rests on the annular boss 11. The annular boss 11 limits the downward sliding of the filter assembly 05 when the device is in use, and ensures the normal use of the device.

Specifically, as shown in fig. 15 to 18, the annular mounting portion 10 includes a first annular body 10a and a second annular body 10b which are distributed in a step shape, the inner layer filter cartridge 051 is connected to the first annular body 10a, the open portion of the outer layer filter cartridge 052 is fitted outside the first annular body 10a, and the end surface of the open portion abuts against the second annular body 10 b.

In this embodiment, the inner diameter of the outer filter cartridge 052 is slightly larger than the outer diameter of the first ring body 10a, so that it can be smoothly fitted over the first ring body 10 a.

As shown in fig. 16, the deformable first seal ring 12 is formed by extending the outer wall of the second annular body 10b of the annular attachment portion 10 in the direction of the dust suction unit 111 toward the outside. The outer diameter of the first sealing ring 12 is larger than the inner diameter of the dust box 04 at the intersection of the filter assembly 05 and the dust box 04, when the annular mounting portion 10 is embedded into the dust box 04, the annular mounting portion and the dust box 04 are in interference fit, the first sealing ring 12 deforms and always keeps an outward acting force on the inner wall of the dust box 04, and sealing of the filter assembly 05 and the dust box 04 is achieved.

As shown in fig. 17 and 19, the outer filter cartridge 052 includes a cylindrical support 052a and a filter net 052b disposed on the cylindrical support 052a, and a detachable structure is provided between the cylindrical support 052a and the first ring body 10 a.

As shown in fig. 18 and 19, the detachable structure includes at least one arc-shaped sliding rib 20 and at least one arc-shaped sliding groove 21 on the inner wall of the cylindrical support 052a, which are circumferentially distributed on the outer wall of the first ring body 10a, and the arc-shaped sliding rib 20 is clamped into the arc-shaped sliding groove 21, so that the outer-layer filter cartridge 052 is fixed outside the inner-layer filter cartridge 051. Make the mutual dismouting process of ectonexine cartridge filter 052 simple convenient through detachable structure, make the cleanness of filtering component 05 and the change of filter core laborsaving high-efficient more.

As shown in fig. 18, preferably, the inner layer filter cartridge 051 includes a plastic bottom disc 051a and a cylindrical hypa filter core 051b, an open end of the cylindrical hypa filter core 051b is connected to the inside of the first ring body 10a of the ring-shaped mounting part 10, and the plastic bottom disc 051a seals the other end of the cylindrical hypa filter core 051 b.

As shown in fig. 9 and 16, it will be understood that the circular air outlet 2 at the center of the annular mounting portion 10 is in butt joint with the air inlet 3 at the front end face of the main vacuum cleaner 101. The inner wall of the circular air outlet 2 at the center of the annular mounting part 10 extends towards the outside of the dust collection main machine 101 to form a deformable second sealing ring 13. The second sealing ring 13 is tightly attached to the front end surface of the dust collection main body 101 and is pressed and deformed to form a sealing structure, thereby ensuring the air tightness between the dust box unit 102 and the dust collection unit 111.

Preferably, the front end face of the dust collection main machine 101 is provided with a boss 14, the air inlet 3 of the dust collection main machine 101 is arranged on the front end face of the boss 14, and the peripheral side part X of the boss 14 is an inclined surface; correspondingly, the second sealing ring 13 is in a horn shape matched with the peripheral side part X of the boss 14, and in this way, the contact area between the second sealing ring 13 and the front end surface of the dust collection main machine 101 is increased within the same distance, and the sealing between the second sealing ring 13 and the front end surface of the dust collection main machine is further enhanced.

Preferably, as shown in fig. 18, the first ring body 10a and the plastic chassis 051a are provided with a hem wrapped outside the cylindrical hypa filter 051 b. The plastic chassis 051a and the cylindrical HEPA filter core 051b are integrally molded by injection. Through the mode, the folding sea handkerchief paper is firmly and three-dimensionally connected to the plastic chassis 051a and the annular mounting part 10, the rigidity of the cylindrical sea handkerchief filter core 051b is enhanced, and the stress deformation of the inner layer filter cartridge 051 is prevented.

As shown in fig. 12, a handle portion 16 is disposed in the inner hole of the annular mounting portion 10, and the handle portion 16 is used for separating the filter assembly 05 from the dust box 04, so as to further enhance the convenience of cleaning the dust box 04.

It is right above the utility model provides a filtering component and dirt box unit have carried out detailed introduction, and it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been elucidated, and the description of above embodiment is only used for helping to understand the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. The filter assembly is arranged on a dust box of the handheld cleaning equipment and is characterized by comprising an inner layer filter cartridge and an outer layer filter cartridge, wherein one end of the inner layer filter cartridge is provided with an annular installation part, the outer layer filter cartridge is sleeved outside the inner layer filter cartridge, and the open part of the outer layer filter cartridge is connected to the annular installation part through a detachable structure.

2. The filter assembly of claim 1, wherein the annular mounting portion comprises a first annular body and a second annular body distributed in a step shape, the inner filter cartridge is connected with the first annular body, the open part of the outer filter cartridge is sleeved outside the first annular body, and the end surface of the open part abuts against the second annular body.

3. The filter assembly of claim 2, wherein the outer filter cartridge comprises a cylindrical support and a filter screen disposed on the cylindrical support, and the removable structure is disposed between the cylindrical support and the first annular body.

4. The filter assembly of claim 2, wherein the inner filter cartridge comprises a plastic base plate and a cylindrical HEPA filter element having one end closed by the plastic base plate, the cylindrical HEPA filter element having an open end connected to the first annular body.

5. The filter assembly according to claim 3, wherein the detachable structure comprises at least one arc-shaped sliding rib circumferentially disposed on the outer wall of the first annular body and at least one arc-shaped sliding groove on the inner wall of the cylindrical support, and the arc-shaped sliding rib is clamped into the arc-shaped sliding groove, so as to fix the outer-layer filter cartridge outside the inner-layer filter cartridge.

6. The filter assembly of claim 1, wherein the outer wall of the annular mounting portion extends outwardly to form a deformable first seal ring; the inner wall of the air outlet in the center of the annular mounting part extends outwards to form a deformable second sealing ring.

7. The filter assembly of claim 4, wherein the plastic chassis is provided with a hem that wraps the outside of the cylindrical HEPA filter element, and the plastic chassis and the cylindrical HEPA filter element are integrally injection-molded.

8. The filter assembly of claim 1, wherein the annular mounting portion has a handle portion disposed within the inner bore, the handle portion adapted to separate the filter assembly from the dirt box.

9. A dust box unit, characterized in that, it includes the filter assembly and the dust box as in any of claims 1-8, one end of the dust box is open, the filter assembly is plugged into the inner cavity of the dust box integrally in an inward mode, the outer wall of the annular mounting part is blocked on the inner wall of the open end of the dust box.

10. The dust box unit of claim 9, wherein the inner wall of the open end of the dust box is provided with an annular boss, and the outer wall of the annular mounting portion rests on the annular boss.

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