A hand-held vacuum cleaner

Abstract

The present application relates to a kind of handheld vacuum cleaner, including vacuum cleaner main body, dust cup and filter assembly, dust cup is connected on vacuum cleaner main body, dust cup is provided with suction inlet knot, filter assembly includes filter core, annular separator, filter core is connected on vacuum cleaner main body and is located in dust cup, annular separator is set in filter core outside, airflow passage is formed between dust cup and annular separator, airflow passage is communicated with suction inlet structure, annular separator has multiple channels, the channel is communicated with filter core, the inlet of channel is located in airflow passage side, the outlet of channel is located in filter core side, the angle between the extension direction of channel from its inlet to outlet and the flow direction of airflow in airflow passage is obtuse angle.The present application slows down the dust adhesion rate of filter core outer surface, realizes good protection to filter core, improves the service life of filter core, guarantees filtering effect, and annular separator has simple overall structure, is easy to install, and has lower cost.

Description

Technical Field

[0001] This invention belongs to the field of vacuum cleaner technology, specifically relating to a handheld vacuum cleaner. Background Technology

[0002] A vacuum cleaner is a common cleaning device that creates negative air pressure to suck up dust or debris accumulated on floors, carpets, walls, or other surfaces into its dust collection device. Vacuum cleaners can be categorized by structure into upright, canister, and handheld types. Handheld vacuum cleaners are widely used due to their small size, light weight, and ease of use. A typical handheld vacuum cleaner consists of a main body, a dust cup, and a filter. The main body houses the vacuum cleaner motor, the dust cup is connected to the main body and has a suction port, and the filter is located inside the dust cup. When the handheld vacuum cleaner is working, the vacuum cleaner motor in the main body creates negative pressure inside the dust cup, generating suction to draw dust or debris through the suction port. The filter separates larger dust and debris particles from the air and collects them in the dust cup. The filtered air is then exhausted through an exhaust grille on the main body.

[0003] However, after a period of use, the outer surface of the filter element in a handheld vacuum cleaner usually accumulates a large amount of dust, leading to a decrease in suction power and a reduction in the filter's filtration efficiency. At this point, the filter element needs to be disassembled for cleaning or replacement. Currently, to extend the lifespan of the filter element and prevent frequent cleaning or replacement, handheld vacuum cleaners with filter cleaning devices have emerged. See Chinese invention patent CN208573588U, which discloses a dust filtration assembly and a vacuum cleaner. The dust filtration assembly includes a bracket, a filter screen, a scraper, and a drive device. The filter screen is rotatably mounted on the bracket, and the drive device drives the filter screen to rotate. The scraper is mounted on the bracket, and its blade abuts against the outer surface of the filter screen to scrape away dust adhering to it as the filter screen rotates. However, the scraper requires a drive device to operate, resulting in a complex internal structure for the handheld vacuum cleaner. This makes simple modifications to the existing structure impossible, leading to higher costs. Furthermore, the drive device generates noise and is cumbersome to operate. Summary of the Invention

[0004] The purpose of this invention is to provide a handheld vacuum cleaner that solves problems such as dust easily adhering to the outer surface of the filter element and the complex structure of existing cleaning devices.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A handheld vacuum cleaner includes a vacuum cleaner body, a dust collection cup, and a filter assembly. The dust collection cup is connected to the vacuum cleaner body and has an inlet structure. The filter assembly includes a filter element connected to the vacuum cleaner body and located inside the dust collection cup. The filter assembly further includes an annular separator sleeved on the outside of the filter element. An airflow channel is formed between the dust collection cup and the annular separator, and the airflow channel communicates with the inlet structure. The annular separator has multiple channels connecting the airflow channel and the filter element. The inlet of each channel is located on one side of the airflow channel, and the outlet of each channel is located on one side of the filter element. The angle between the extension direction of each channel from its inlet to its outlet and the flow direction of the airflow in the airflow channel is an obtuse angle.

[0007] Preferably, the plurality of channels are evenly distributed on the sidewall of the annular separator.

[0008] Preferably, the annular separator includes a top ring, a bottom ring, and multiple plates, with the multiple plates connected between the top ring and the bottom ring, and a channel formed between two adjacent plates.

[0009] More preferably, the plate is arc-shaped and bends away from the flow direction of the airflow in the airflow channel, thereby improving the separation effect of the annular separator on dust particles.

[0010] Preferably, the filter element includes a filter support and a filter screen, the filter screen being disposed on the filter support, and the annular separator being connected to the filter support.

[0011] More preferably, the height of the annular separator is not less than the height of the filter screen, so that the annular separator completely covers the filter screen and prevents any part of the filter screen from being exposed in the airflow channel.

[0012] Preferably, the annular separator and the filter element are detachably connected, making it easier to disassemble the annular separator.

[0013] Preferably, the dust collection cup, filter element, and annular separator are arranged coaxially.

[0014] Preferably, the inlet structure includes an inlet, an outlet, and an inlet channel connecting the inlet and the outlet, the airflow channel is annular, and the outlet is tangent to the airflow channel.

[0015] More preferably, the inlet structure further includes two guide plates disposed within the inlet channel, the extension direction of the two guide plates being consistent with the orientation of the outlet, and the outlet being formed between the two guide plates.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] This invention reduces the probability of dust particles in the airflow directly acting on the outer surface of the filter element by setting an annular separator with channels on the outside of the filter element, slows down the dust adhesion rate on the outer surface of the filter element, achieves good protection for the filter element, improves the service life of the filter element, and ensures the filtration effect. The annular separator has a simple overall structure and is easy to install. It can be directly modified and installed on existing handheld vacuum cleaners at a low cost. Attached Figure Description

[0018] Appendix Figure 1 This is an explosion diagram of the handheld vacuum cleaner in this embodiment;

[0019] Appendix Figure 2 This is a front view schematic diagram of the handheld vacuum cleaner in this embodiment;

[0020] Appendix Figure 3 For the appendix Figure 2 Schematic diagram of the cross section of AA;

[0021] Appendix Figure 4 For the appendix Figure 3 A magnified view of a portion of point B in the middle;

[0022] Appendix Figure 5 For the appendix Figure 3 Cross-sectional view of CC;

[0023] Appendix Figure 6 This is a three-dimensional schematic diagram of the annular separator in this embodiment.

[0024] In the attached diagrams: 1. Vacuum cleaner body; 2. Dust collection cup; 20. Airflow channel; 21. Bottom cover; 3. Filter assembly; 31. Filter element; 311. Filter bracket; 312. Filter screen; 32. Annular separator; 320. Channel; 321. Top ring; 322. Bottom ring; 323. Plate; 4. Suction inlet structure; 41. Inlet; 42. Outlet; 43. Suction channel; 44. Guide plate. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] A handheld vacuum cleaner, such as Figure 1 and Figure 2 As shown, the vacuum cleaner includes a main body 1, a dust collection cup 2, and a filter assembly 3. The dust collection cup 2 is connected to the main body 1 and has an intake structure 4. The intake structure 4 is connected to the interior of the dust collection cup 2. The filter assembly 3 is located inside the dust collection cup 2 and is used to filter dust, foreign objects, etc. in the airflow drawn into the dust collection cup 2 from the intake structure 4.

[0029] The following is a detailed introduction to each component:

[0030] A connecting part is provided at the bottom of one side of the vacuum cleaner body 1, and the top of the dust cup 2 is detachably connected to the connecting part of the vacuum cleaner body 1. The bottom of the dust cup 2 is sealed by the bottom cover 21, that is, the bottom cover 21 is detachably connected to the bottom of the dust cup 2. Specifically, it can be connected by means of hinge, threaded connection, etc., but it is not limited to these two methods.

[0031] The filter assembly 3 is installed inside the dust collection cup 2. The filter assembly 3 is used to filter dust, foreign objects, etc. in the airflow entering the dust collection cup 2, such as... Figures 3 to 5As shown, the filter assembly 3 includes a filter element 31 and an annular separator 32. The filter element 31 is connected to the vacuum cleaner body 1 and located inside the dust collection cup 2. The annular separator 32 is sleeved on the outside of the filter element 31, forming an airflow channel 20 between the dust collection cup 2 and the annular separator 32. Specifically:

[0032] Filter element 31 includes filter support 311 and filter screen 312, such as Figure 5 As shown, the top of the filter bracket 311 is detachably connected to the connecting part of the vacuum cleaner body 1. The filter screen 312 is the core component for filtering dust, foreign objects and other debris in the airflow. The filter screen 312 is sleeved on the filter bracket 311. The filter bracket 311, the filter screen 312 and the dust collection cup 2 are coaxially arranged.

[0033] The annular separator 32 is detachably connected to the filter support 311, and is coaxially arranged with the dust collection cup 2, the filter support 311, and the filter screen 312. This can be achieved using methods such as snap-fit ​​connection or threaded connection, but is not limited to these two methods. The height of the annular separator 32 is not less than the height of the filter screen 312; that is, when the annular separator 32 is connected to the filter support 311, it can completely cover the filter screen 312, preventing any part of the filter screen 312 from being directly exposed in the airflow channel 20. Multiple channels 320 are formed on the side wall of the annular separator 32, evenly distributed circumferentially around the axis of the annular separator 32. The channels 320 connect the airflow channel 20 and the filter element 31. The inlet of the channel 320 is located on one side of the airflow channel 20, and the outlet of the channel 320 is located on one side of the filter element 31. Figure 4 As shown, the angle α between the extension direction of channel 320 from its inlet to its outlet and the flow direction of the airflow in airflow channel 20 is obtuse, in order to achieve effective separation of dust and foreign objects. Specifically:

[0034] The annular separator 32 includes a top ring 321, a bottom ring 322, and a plate 323, such as Figure 6 As shown, multiple plates 323 are provided, with the tops of the multiple plates 323 connected to the top ring 321 and the bottoms of the multiple plates 323 connected to the bottom ring 322; as Figure 4 As shown, one side of plate 323 faces filter element 31, and the other side of plate 323 faces airflow channel 20. A channel 320 is formed between adjacent plates 323. Multiple plates 323 are evenly distributed circumferentially around the axis of the annular separator 32, ensuring that the dimensions of the multiple channels 320 are consistent. Plate 323 is generally arc-shaped and bends away from the flow direction of the airflow in airflow channel 20, which improves the separation effect of the annular separator 32 on dust particles in the airflow. In this embodiment, because the airflow flows counterclockwise within airflow channel 20, plate 323 bends clockwise.

[0035] The suction inlet structure 4 is connected to the airflow channel 20 and is used to draw dust, debris, etc., into the airflow channel 20 of the dust collection cup 2. Specifically, the suction inlet structure 4 includes an inlet 41, an outlet 42, and a suction channel 43. The inlet 41 and the outlet 42 are connected by the suction channel 43, and the outlet 42 is inclined, specifically, the direction of the outlet 42 is tangent to the annular airflow channel 20, guiding the airflow entering the airflow channel 20 to flow clockwise or counterclockwise. Specifically, two guide plates 44 are provided inside the suction channel 43, and the extension direction of the two guide plates 44 is consistent with the direction of the outlet 42, forming the outlet 42 between the two guide plates 44. In this embodiment, the two guide plates 44 extend inclinedly to the same side, causing the airflow to enter the airflow channel 20 from the outlet 42 and flow counterclockwise.

[0036] The working process of this embodiment is described in detail below:

[0037] When the handheld vacuum cleaner is turned on, the airflow carrying dust and debris enters the suction channel 43 through the inlet 41 of the suction inlet structure 4 and enters the airflow channel 20 between the dust collection cup 2 and the annular separator 32 through the outlet 42. When the airflow flows through the airflow channel 20, the airflow will be blocked to a certain extent before entering the channel 320 of the annular separator 32. During this process, some of the dust and debris in the airflow will fall directly to the bottom of the dust collection cup 2 due to the obstruction of the plate 323. Then the airflow passes through the filter element 31 for filtration, which can reduce the probability of dust and debris in the airflow directly acting on the outer surface of the filter screen 312, slow down the dust adhesion rate on the outer surface of the filter screen 312, achieve good protection for the filter element 31, improve the service life of the filter element 31, and ensure the filtration effect.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A handheld vacuum cleaner, comprising a vacuum cleaner body (1), a dust collection cup (2), and a filter assembly (3), wherein the dust collection cup (2) is connected to the vacuum cleaner body (1), and the dust collection cup (2) is provided with a suction inlet structure (4); the filter assembly (3) includes a filter element (31), the filter element (31) is connected to the vacuum cleaner body (1) and located inside the dust collection cup (2), the filter element (31) includes a filter support (311) and a filter screen (312), the filter screen (312) being disposed on the filter support (311), characterized in that: The filter assembly (3) further includes an annular separator (32), which is sleeved on the outside of the filter element (31) and connected to the filter support (311). An airflow channel (20) is formed between the dust collection cup (2) and the annular separator (32). The airflow channel (20) is connected to the suction port structure (4). The annular separator (32) has multiple channels (320) connecting the airflow channel (20) and the filter element (31). The multiple channels (320) are evenly distributed on the side wall of the annular separator (32). The inlet of each channel (320) is located in the airflow channel (20). On one side, the outlet of the channel (320) is located on one side of the filter element (31). The angle between the extension direction of the channel (320) from its inlet to its outlet and the flow direction of the airflow in the airflow channel (20) is obtuse. The annular separator (32) includes a top ring (321), a bottom ring (322) and a plurality of plates (323). The plurality of plates (323) are connected between the top ring (321) and the bottom ring (322). The channel (320) is formed between two adjacent plates (323). The plates (323) are arc-shaped and bend away from the flow direction of the airflow in the airflow channel (20).

2. The handheld vacuum cleaner according to claim 1, characterized in that: The height of the annular separator (32) is not less than the height of the filter screen (312), so that the annular separator (32) completely covers the filter screen (312).

3. The handheld vacuum cleaner according to claim 1, characterized in that: The annular separator (32) is detachably connected to the filter element (31).

4. The handheld vacuum cleaner according to claim 1, characterized in that: The dust collection cup (2), filter element (31) and annular separator (32) are arranged coaxially.

5. The handheld vacuum cleaner according to claim 1, characterized in that: The inlet structure (4) includes an inlet (41), an outlet (42) and an inlet channel (43) connecting the inlet (41) and the outlet (42). The airflow channel (20) is annular, and the outlet (42) is tangent to the airflow channel (20).

6. The handheld vacuum cleaner according to claim 5, characterized in that: The inlet structure (4) further includes two guide plates (44) disposed in the inlet channel (43), the extension direction of the two guide plates (44) is consistent with the orientation of the outlet (42), and the outlet (42) is formed between the two guide plates (44).

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