A multi-stage filtration hand vacuum cleaner

Abstract

This application belongs to the field of vacuum cleaner technology and discloses a handheld vacuum cleaner with multi-stage filtration, including a handheld handle, a battery, a suction tube, a filter cup, and a main unit. The suction tube has an arc-shaped mounting groove at its top, and air holes communicating with the tube cavity are provided on the bottom surface of the arc-shaped mounting groove. The filter cup is placed in the arc-shaped mounting groove, and its bottom has a first air inlet communicating with the air holes. A filter screen assembly is installed inside the filter cup. The main unit includes a cover, a sealing seat, an inner shell, and a fan assembly. Several internal air outlets are arranged on the inner shell, and several external air outlets are arranged on the cover. An air outlet sponge is placed between the inner shell and the cover. By setting up the filter screen assembly and the air outlet sponge, debris and larger dust particles are filtered by the filter screen assembly, while smaller dust particles are adsorbed onto the air outlet sponge, thereby ensuring that the air blown out from the external air outlets does not contain fine particulate dust or other pollutants, ensuring effective dust removal and cleaning.

Description

Technical Field

[0001] This utility model relates to the field of vacuum cleaner technology, and in particular to a handheld vacuum cleaner with multi-stage filtration. Background Technology

[0002] Handheld vacuum cleaners, as a type of portable cleaning device, are widely used in various scenarios such as homes, cars, and offices due to their advantages of flexible operation and portability.

[0003] Currently, most handheld vacuum cleaners on the market use a single filter (such as non-woven fabric filter, HEPA filter, etc.) to filter dust and debris. Their filtration accuracy is limited, making it difficult to effectively trap fine particulate matter in the air. As a result, the exhaust air still contains fine dust and other pollutants, causing secondary pollution and resulting in poor dust removal performance. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a handheld vacuum cleaner with multi-stage filtration.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a multi-stage filtration handheld vacuum cleaner, comprising a handheld handle, a storage battery, a suction pipe, a filter cup, and a main unit. The storage battery is located at the bottom of the handheld handle to provide power to the main unit. The suction pipe is located at the front end of the handheld handle, and its top is provided with an arc-shaped mounting groove. An air hole communicating with the suction pipe cavity is provided on the bottom surface of the arc-shaped mounting groove near the main unit. The filter cup is located within the arc-shaped mounting groove, and its bottom is provided with a first air inlet communicating with the air hole. The filter cup contains a filter screen assembly. The main unit includes a cover with an opening at the front end and located at the top of the handle. A sealing seat is located at the front end of the cover, and a second air inlet is located in the middle of the sealing seat. The open end of the filter cup is connected to the sealing seat. An inner shell with an opening at the front end is located inside the cover. Several internal air outlets are arranged in a ring at intervals on the rear side of the inner shell, and several external air outlets are arranged in a ring at intervals on the rear side of the cover. An air outlet sponge is provided between the inner shell and the cover. A fan assembly is located inside the inner shell.

[0006] By adopting the above technical solution, a filter assembly is installed inside the filter cup, and an air outlet sponge is installed between the inner shell and the outer shell. When the vacuum cleaner is working, the fan assembly is activated, and the suction force of the fan draws debris, dust, and air from the suction pipe. The airflow path is formed through the air hole, the first air inlet, the filter assembly, the second air inlet, the fan assembly, the inner air outlet, the air outlet sponge, and the outer air outlet. Debris and larger dust particles are filtered by the filter assembly and left in the filter cup, while smaller dust particles enter the fan assembly with the air and are finally adsorbed on the air outlet sponge by the filtration action of the air outlet sponge. This ensures that the air blown out from the outer air outlet does not contain fine particulate dust or other pollutants, thus ensuring the dust removal and cleaning effect.

[0007] Furthermore, the filter assembly includes a filter branch pipe, one end of which is detachably disposed at the open end of the filter cup, and the other end is in sealed contact with the bottom of the filter cup. The filter branch pipe has an opening on the side wall near the main unit and is provided with an annular metal filter screen. A HEPA filter element with its opening facing the main unit is disposed inside the filter branch pipe.

[0008] By adopting the above technical solution, a metal filter and a HEPA filter are installed. Larger impurities are first filtered through the metal filter, and then smaller impurities such as dust are filtered through the HEPA filter. In this way, the dust particles contained in the air entering the fan assembly are small due to the two-layer filtration effect of the metal filter and the HEPA filter, so as not to affect the normal operation of the fan assembly.

[0009] Furthermore, the filter branch pipe includes an installation pipe disposed at the opening end of the filter cup and a support pipe that is in sealed contact with the bottom of the filter cup. The installation pipe and the support pipe are connected by several connecting plates, and a metal filter screen is disposed on the connecting plates. An arc-shaped plate protrudes from the side of the installation pipe near the support pipe and is arranged close to the metal filter screen, and a stop block is disposed on the arc-shaped plate. A baffle is disposed on the side of the arc-shaped plate away from the installation pipe. The arc-shaped plate, the stop block, the baffle, and the side of the installation pipe together form an arc-shaped air guide groove. The cavity of the arc-shaped air guide groove is connected to the first air inlet on the filter cup. A flexible baffle plate protrudes from the stop block toward the arc-shaped air guide groove to block the first air inlet.

[0010] By adopting the above technical solution, an installation pipe and a support pipe are set up. The installation pipe is used to install the filter branch pipe inside the filter cup and to install the HEPA filter element. The support pipe is used to support the metal filter screen together with the installation pipe. Furthermore, by setting up arc-shaped plates, blocks, and baffles, together with the side of the installation pipe, an arc-shaped air guide channel is formed, allowing air to enter from the arc-shaped air guide channel. In this way, under the suction of the fan assembly, the drawn-in air will carry impurities and dust around the metal filter screen, ensuring the filtration effect of the metal filter screen.

[0011] Furthermore, a stepped groove is provided on the side of the sealing seat near the filter cup. The outer diameter of the bottom surface of the stepped groove is consistent with the inner wall diameter of the filter cup opening end. A snap-fit ​​block is also provided on the bottom surface of the stepped groove, and a corresponding snap-fit ​​groove is provided on the inner wall of the filter cup opening end.

[0012] By adopting the above technical solution, step grooves, snap-fit ​​blocks, and snap-fit ​​slots are provided to facilitate the connection between the filter cup and the sealing seat.

[0013] Furthermore, a sliding block is provided at the bottom of the arc-shaped mounting groove, and two vertical locking holes communicating with the arc-shaped mounting groove are arranged at intervals inside the sliding block. A wedge-shaped locking block is provided on one side of the vertical locking hole, and two buckles are correspondingly provided at the bottom of the filter cup.

[0014] By adopting the above technical solution, sliding blocks, vertical locking holes, wedge-shaped locking blocks, and buckles are set up to facilitate the snap-fit ​​connection between the filter cup and the arc-shaped mounting groove.

[0015] Furthermore, the side wall of the arc-shaped mounting groove is provided with a through hole, and a button is provided on the sliding block protruding into the through hole.

[0016] By adopting the above technical solution, and setting through holes and buttons, it is easy to control the sliding block, thereby facilitating the installation and disassembly of the filter cup.

[0017] In summary, this utility model has the following beneficial effects: In this application, by setting a filter assembly inside the filter cup and setting an air outlet sponge between the inner shell and the cover, when the vacuum cleaner is working, the fan assembly is activated, and under the suction of the fan, debris, dust and air are sucked in from the suction pipe. The air path is formed through the air hole, the first air inlet, the filter assembly, the second air inlet, the fan assembly, the inner air outlet, the air outlet sponge and the outer air outlet. Debris and larger dust are filtered by the filter assembly and left in the filter cup, while smaller dust enters the fan assembly with the air and is finally adsorbed on the air outlet sponge under the filtering action of the air outlet sponge. This ensures that the air blown out from the outer air outlet does not contain fine particulate dust or other pollutants, thus ensuring the dust removal and cleaning effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the handheld handle, storage battery, vacuum tube, and main unit of this utility model embodiment;

[0020] Figure 3 This is a cross-sectional structural diagram of the sliding block used to highlight an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the filter cup structure according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the filter assembly according to an embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional structural diagram of the host portion of an embodiment of this utility model.

[0024] In the diagram: 10. Hand handle; 20. Battery; 30. Vacuum hose; 31. Arc-shaped mounting groove; 32. Air vent; 33. Sliding block; 34. Vertical locking hole; 35. Wedge-shaped locking block; 36. Through hole; 37. Button; 40. Filter cup; 41. First air inlet; 42. Slot; 43. Buckle; 50. Main unit; 51. Cover; 52. Sealing seat; 521. Step groove; 522. Clip 53. Connecting block; 54. Second air inlet; 55. Inner shell; 56. Inner air outlet; 57. Outer air outlet; 58. Air outlet sponge; 59. Fan assembly; 60. Filter assembly; 61. Filter branch pipe; 62. Metal filter screen; 63. HEPA filter element; 64. Mounting pipe; 65. Support pipe; 66. Arc plate; 661. Block; 662. Baffle; 67. Arc-shaped air guide groove; 68. Flexible wind deflector. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] like Figure 1-6 As shown in the figure, this application discloses a multi-stage filtration handheld vacuum cleaner, including a hand handle 10, a battery 20, a suction pipe 30, a filter cup 40, and a main unit 50. The hand handle 10 is for the operator to hold and is provided with an on / off switch for controlling the opening and closing of the main unit 50. The battery 20 is located at the bottom of the hand handle 10 to provide power to the main unit 50. The suction pipe 30 is located at the front end of the hand handle 10 as a suction inlet, and its top is provided with an arc-shaped mounting groove 31. The filter cup 40 is located in the arc-shaped mounting groove 31 to filter the sucked-in debris and dust. The main unit 50 is located at the top of the hand handle 10 and is connected to the open end of the filter cup 40 to provide suction power.

[0027] The bottom surface of the arc-shaped mounting groove 31, near the main unit 50, has an air hole 32 communicating with the cavity of the suction pipe 30. The bottom of the filter cup 40 has a first air inlet 41 communicating with the air hole 32, allowing debris, dust, and air drawn in from the suction pipe 30 to enter the filter cup 40. Specifically, a sliding block 33 is horizontally slidably mounted on the bottom of the arc-shaped mounting groove 31. Two vertical locking holes 34 communicating with the arc-shaped mounting groove 31 are arranged at intervals within the sliding block 33. A wedge-shaped locking block 35 is provided on one side of each vertical locking hole 34, and two corresponding clips 43 are provided on the bottom of the filter cup 40. During installation, the two clips 43 on the bottom of the filter cup 40 are inserted into the vertical locking holes 34 and pressed downwards, causing the clips 43 to engage with the wedge-shaped locking block 35, thus achieving a snap-fit ​​connection between the filter cup 40 and the arc-shaped mounting groove 31.

[0028] A compression spring connected to the sliding block 33 is also provided at the bottom of the arc-shaped mounting groove 31. The compression spring provides support for the sliding block 33, so that the wedge-shaped locking block 35 on the sliding block 33 is always engaged with the buckle 43 at the bottom of the filter cup 40. A through hole 36 is provided on the side wall of the arc-shaped mounting groove 31. A button 37 is provided on the sliding block 33 protruding into the through hole 36. By pressing the button 37, the sliding block 33 is driven to slide, thereby pressing the compression spring and moving the wedge-shaped locking block 35 on the sliding block 33 away from the buckle 43 at the bottom of the filter cup 40, making it easier to remove the filter cup 40 for cleaning.

[0029] The filter cup 40 has a cup-shaped structure with its open end facing the main unit 50, and a filter assembly 60 is installed inside. The filter assembly 60 includes a filter branch pipe 61, one end of which is detachably attached to the open end of the filter cup 40, and the other end is in sealed contact with the bottom of the filter cup 40. An opening is provided on the side wall of the filter branch pipe 61 near the main unit 50, and an annular metal filter screen 62 is installed thereon. A HEPA filter element 63 is installed inside the filter branch pipe 61. Specifically, the filter branch pipe 61 includes an installation pipe 64 located at the open end of the filter cup 40 and a support pipe 65 in sealed contact with the bottom of the filter cup 40. The installation pipe 64 and the support pipe 65 are connected by several connecting plates, and a metal filter screen 62 is installed on the outer sleeve of the connecting plates. The metal filter screen 62 serves as the first line of filtration, used to filter larger particles of debris and dust. An arc-shaped plate 66 protrudes from the side of the mounting pipe 64 near the support pipe 65, close to the metal filter 62, and a baffle 661 is provided on the arc-shaped plate 66. A baffle 662 is provided on the side of the arc-shaped plate 66 away from the mounting pipe 64. The arc-shaped plate 66, the baffle 661, the baffle 662, and the side of the mounting pipe 64 together form an arc-shaped air guide groove 67. The cavity of the arc-shaped air guide groove 67 is connected to the first air inlet 41 on the filter cup 40, so that air enters from the arc-shaped air guide groove 67. Under the suction of the main unit 50, the sucked-in air carries impurities and dust around the metal filter 62, ensuring the filtration effect of the metal filter 62. A flexible baffle 68 protrudes from the baffle 661 toward the arc-shaped air guide groove 67 to block the first air inlet 41. Under the suction, the flexible baffle 68 will stick to the arc-shaped air guide groove 67, so that the first air inlet 41 is opened, making it easier for impurities and dust to enter. When the main unit 50 is not working, the flexible baffle 68 blocks the first air inlet 41, thus preventing debris sucked into the filter cup 40 from re-entering the suction pipe 30 through the first air inlet 41, and avoiding debris falling and affecting the cleaning effect. The HEPA filter 63 is installed inside the installation pipe 64, with its main body located inside the metal filter screen 62 and its opening facing the main unit 50. As a second line of filtration, the HEPA filter 63 filters the intake air through the metal filter screen 62 and then through the HEPA filter 63, which can filter out most of the dust, ensuring that the dust particles contained in the air entering the main unit 50 are small and will not affect the normal operation of the fan assembly 58.

[0030] The main unit 50 includes a cover 51 located on top of the hand handle 10 and open at the front. A sealing seat 52 is provided at the front of the cover 51, and the open end of the filter cup 40 is connected to the sealing seat 52. Specifically, a stepped groove 521 is provided on the side of the sealing seat 52 near the filter cup 40. The outer diameter of the bottom surface of the stepped groove 521 is the same as the inner wall diameter of the open end of the filter cup 40, so that the open end of the filter cup 40 can be fitted onto the stepped groove 521. A snap-fit ​​block 522 is also provided on the bottom surface of the stepped groove 521, and a corresponding snap-fit ​​groove 42 is provided on the inner wall of the open end of the filter cup 40. When the open end of the filter cup 40 is fitted onto the stepped groove 521, the snap-fit ​​block 522 is pressed into the snap-fit ​​groove 42 to achieve snap-fit.

[0031] An inner shell 54 with a front opening is provided inside the cover 51. The front end of the inner shell 54 is fixed to a sealing seat 52. A second air inlet 53 is provided in the middle of the sealing seat 52, and the second air inlet 53 communicates with the cavity of the inner shell 54. A fan assembly 58 is provided inside the inner shell 54 to provide airflow. Several internal air outlets 55 are arranged in a ring at intervals on the rear side of the inner shell 54, and several external air outlets 56 are arranged in a ring at intervals on the rear side of the cover 51. An air outlet sponge 57 is provided between the inner shell 54 and the cover 51. The air outlet sponge 57 acts as a third line of filtration, which can adsorb smaller dust and other particles, thereby ensuring that the air blown out from the external air outlets 56 does not contain fine dust or other pollutants, ensuring dust removal and cleaning effect.

[0032] This embodiment forms an air path from the suction pipe 30, air hole 32, first air inlet 41, arc-shaped air guide channel 67, metal filter 62, HEPA filter 63, second air inlet 53, fan assembly 58, inner air outlet 55, air outlet sponge 57 to outer air outlet 56. Under the suction of the fan assembly 58, debris, dust and air are sucked in. After three stages of filtration by the metal filter 62, HEPA filter 63 and air outlet sponge 57, debris and most of the dust can be left in the filter cup 40. A small amount of dust or other pollutants with smaller particle size are adsorbed on the air outlet sponge 57, thereby ensuring that the air discharged when the vacuum cleaner is working does not contain fine particulate dust or other pollutants, effectively ensuring the dust removal and cleaning effect.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A multi-stage filtration hand vacuum cleaner characterized by: The device includes a hand handle (10), a battery (20), a suction pipe (30), a filter cup (40), and a main unit (50). The battery (20) is located at the bottom of the hand handle (10) to provide power to the main unit (50). The suction pipe (30) is located at the front end of the hand handle (10), and its top is provided with an arc-shaped mounting groove (31). The bottom surface of the arc-shaped mounting groove (31) near the main unit (50) is provided with a vent (32) that communicates with the cavity of the suction pipe (30). The filter cup (40) is located in the arc-shaped mounting groove (31), and its bottom is provided with a first air inlet (41) that communicates with the vent (32). A filter assembly (60) is provided inside the filter cup (40). The machine (50) includes a cover (51) with an opening at the front end and located on the top of the hand handle (10). A sealing seat (52) is provided at the front end of the cover (51). A second air inlet (53) is provided in the middle of the sealing seat (52). The open end of the filter cup (40) is connected to the sealing seat (52). An inner shell (54) with an opening at the front end is provided inside the cover (51). A plurality of internal air outlets (55) are arranged in a ring at intervals on the rear side of the inner shell (54). A plurality of external air outlets (56) are arranged in a ring at intervals on the rear side of the cover (51). An air outlet sponge (57) is provided between the inner shell (54) and the cover (51). A fan assembly (58) is provided inside the inner shell (54).

2. The handheld vacuum cleaner with multi-stage filtration according to claim 1, characterized in that: The filter assembly (60) includes a filter branch pipe (61), one end of which is detachably disposed at the open end of the filter cup (40), and the other end is in sealed contact with the bottom of the filter cup (40). The filter branch pipe (61) has an opening on the side wall near the main unit (50) and is provided with an annular metal filter screen (62). The filter branch pipe (61) is provided with a HEPA filter element (63) with its opening facing the main unit (50).

3. A handheld vacuum cleaner with multi-stage filtration according to claim 2, characterized in that: The filter branch pipe (61) includes an installation pipe (64) disposed at the open end of the filter cup (40) and a support pipe (65) that is in sealed contact with the bottom of the filter cup (40). The installation pipe (64) and the support pipe (65) are connected by several connecting plates, and a metal filter screen (62) is sleeved on the several connecting plates. An arc-shaped plate (66) is protruding from the side of the installation pipe (64) near the support pipe (65) and arranged close to the metal filter screen (62), and a stop block (66) is disposed on the arc-shaped plate (66). 1) A baffle (662) is provided on the side of the arc plate (66) away from the mounting tube (64). The arc plate (66), the baffle (661), the baffle (662) and the side of the mounting tube (64) together form an arc-shaped air guide groove (67). The cavity of the arc-shaped air guide groove (67) is connected to the first air inlet (41) on the filter cup (40). A flexible baffle (68) that blocks the first air inlet (41) is provided on the baffle (661) protruding towards the arc-shaped air guide groove (67).

4. A handheld vacuum cleaner with multi-stage filtration according to claim 1, characterized in that: The sealing seat (52) is provided with a stepped groove (521) on the side near the filter cup (40). The outer diameter of the bottom surface of the stepped groove (521) is consistent with the inner wall diameter of the opening end of the filter cup (40). A snap-fit ​​block (522) is also provided on the bottom surface of the stepped groove (521). A corresponding snap-fit ​​groove (42) is provided on the inner wall of the opening end of the filter cup (40).

5. A handheld vacuum cleaner with multi-stage filtration according to claim 1, characterized in that: The bottom of the arc-shaped mounting groove (31) is provided with a horizontally sliding block (33). The sliding block (33) has two vertical locking holes (34) that communicate with the arc-shaped mounting groove (31) at intervals. A wedge-shaped locking block (35) is provided on one side of the vertical locking hole (34). The bottom of the filter cup (40) is provided with two corresponding buckles (43).

6. A handheld vacuum cleaner with multi-stage filtration according to claim 5, characterized in that: The arc-shaped mounting groove (31) has a through hole (36) on its side wall, and a button (37) protrudes from the sliding block (33) toward the through hole (36).

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