EP4356803A1

EP4356803A1 - Separation structure for dust cup of vacuum cleaner

Info

Publication number: EP4356803A1
Application number: EP21830310.5A
Authority: EP
Inventors: Pengfei LU
Original assignee: Shenzhen Shermon Technology Co Ltd
Current assignee: Shenzhen Shermon Technology Co Ltd
Priority date: 2021-06-16
Filing date: 2021-11-23
Publication date: 2024-04-24
Also published as: US20220400919A1; JP2023534564A

Abstract

A separation structure for a dust cup of a vacuum cleaner is provided and includes a cyclone separator. The cyclone separator is provided with a connecting ring, a plurality of arc blades, a plurality of flat plates, a conical tube and a cylindrical tube. Each arc blade has a top fixedly connected with the connecting ring and a bottom fixedly connected with a respective flat plate. The flat plates are fixedly mounted at a large end of the conical tube. A plurality of air inlets are formed by gaps defined by the connecting ring, the arc blades and the flat plates. The cylindrical tube is fixedly connected with and communicated with the conical tube. A small end of the conical tube is received in the cylindrical tube. An included angle between each arc blade and the respective flat plate is an obtuse angle.

Description

TECHNICAL FIELD

The present disclosure relates to relates to the technical field of vacuum cleaners, in particular to a separation structure for a dust cup of a vacuum cleaner.

BACKGROUND

In a present vacuum cleaner, a filter unit and including a single-cone single-stage cyclone filter structure or a multi-cone multi-stage cyclone filter structure is provided to facilitate cleaning. The single-cone single-stage cyclone filter structure includes a cyclone separation structure with only one stage, for once separating air flow from which impurities is to be separated. The multi-cone multi-stage cyclone filter structure includes a cyclone separation structure with two or more stages, where a direction of the air flow being discharged from an air outlet of a primary cyclone separation structure is substantially the same as a direction of the air flow entering a secondary cyclone separation structure. A cross-sectional area of the air outlet of the primary cyclone separation structure is generally larger than a cross-sectional area of an air inlet of the secondary cyclone separation structure, so that the air flow entering the secondary cyclone separation structure will be continuously speeded up to improve cyclone separation effect. At present, the single-cone single-stage cyclone filter structure is usually employed for a small-sized vacuum cleaner, and due to its low cyclone separation efficiency, it is difficult to achieve effective dust separation and filtration. The multi-cone and multi-stage cyclone filter structure is of structural complexity and occupies a large space, which makes it difficult to follow development of the vacuum cleaner towards miniaturization. Therefore, both the single-cone single-stage cyclone filter structure and the multi-cone multi-stage cyclone filter structure at present have unavoidable disadvantages, resulting in undesirable user experience and low cleaning efficiency.

SUMMARY

In order to solve the above problems, the present disclosure provides a separation structure for a dust cup of a vacuum cleaner.
The present disclosure is realized by the following technical schemes.
The present disclosure provides a separation structure for a dust cup of a vacuum cleaner. The separation structure includes a cyclone separator provided with a connecting ring, a plurality of arc blades, a plurality of flat plates, a conical tube and a cylindrical tube. Each of the plurality of arc blades has a top fixedly connected with the connecting ring and a bottom fixedly connected with a respective one of the plurality of flat plates. The plurality of flat plates are fixedly mounted at a large end of the conical tube. A plurality of air inlets are formed by gaps defined by the connecting ring, the plurality of arc blades and the a plurality of flat plates. The cylindrical tube is fixedly connected with and communicated with the conical tube. A small end of the conical tube is received in the cylindrical tube. An included angle between each of the plurality of arc blades and the respective one of the plurality of flat plates is an obtuse angle.
In an embodiment, the cyclone separator is provided with four arc blades and four flat plates. The four arc blades and the four plates are uniformly arranged at the large end of the conical tube along a circumference of the large end to define four air inlets.
In an embodiment, the small end of the conical tube is provided with four dust discharging openings and one dust falling opening.
In an embodiment, the separation structure further includes a dust cup, a dust-proof skirt, and a filter screen. A bottom of the filter screen is fixedly connected to the dust-proof skirt. The dust-proof skirt and the filter screen are received in the dust cup. A bottom of the cylindrical tube abuts on a bottom wall of the dust cup.
In an embodiment, a height from an upper surface of the connecting ring to a lower surface of the flat plate is H1, a height of the conical tube is H2, and a ratio of H2 to H1 is in a range of 2 to 3.
In an embodiment, a height of the filter screen is H3, and a ratio of H3 to H1 is in a range of 2 to 2.5.
In an embodiment, a maximum outer diameter of the air inlet along a central axis is D1, an outer diameter of the filter screen is D2, and a ratio of D1 to D2 is in a range of 0.8 to 0.9.
In an embodiment, a distance from an outermost side of the dust-proof skirt to an inner side surface of the dust cup is D3, which is in a range of 6mm to 10mm.
The present disclosure has the following advantageous effects.
The separation structure according to the present disclosure is a single-cone cyclone filter structure. A primary separation may occur between a side wall of the dust cup and the filter screen, a secondary separation and a tertiary separation may occur in the cyclone separator. Herein, the secondary separation occurs in a region from the connecting ring to the plate, and the tertiary separation occurs in the conical tube below a bottom of the plate. Three stages of separation are performed with the single-cone cyclone filter structure, which effectively improves separation effect, so that the separation structure according to the present disclosure has both advantages of the single-cone cyclone filter structure and the multi-cone cyclone filter structure. The flow section of the conical tube along a central axis is gradually reduced to ensure continuous acceleration of the rotating air flow, resulting in a better separation effect. After entering the cyclone separator from the air inlets, the air flow rotates in a high speed and meanwhile is accelerated downward, resulting in a good separation effect in the secondary separation and thus ensuring that the air flow enters the tertiary separation with a higher-speed rotating.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solutions according to the embodiments of the present disclosure more clearly, the accompanying drawings for describing the embodiments are introduced briefly in the following. Apparently, the accompanying drawings in the following description are merely some embodiments of the present disclosure, and those skilled in the art may derive other drawings from the accompanying drawings without creative efforts.

FIG. 1 is a sectional view of a separation structure for a dust cup of a vacuum cleaner according to an embodiment of the present disclosure.
FIG. 2 is a perspective view of a cyclone separator according to an embodiment of the present disclosure.
FIG. 3 is another perspective view of the cyclone separator according to an embodiment of the present disclosure.
FIG. 4 is a sectional view of the cyclone separator according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

For clearer and complete description to the technical schemes of the present disclosure, the present disclosure is described further with reference to the accompanying drawings.
Referring to FIGS. 1-4, the present disclosure provides a separation structure for a dust cup of a vacuum cleaner. The separation structure includes a cyclone separator 10 which is provided with a connecting ring 11, a plurality of arc blades 12, a plurality of flat plates 13, a conical tube 14 and a cylindrical tube 15. A top of each arc blade 12 is fixedly connected with the connecting ring 11, a bottom of each arc blade 12 is fixedly connected with a respective flat plate 13. The flat plates 13 are fixedly mounted at a large end of the conical tube 14. Gaps defined by the connecting ring 11, the arc blades 12 and the flat plates 13 form air inlets 21. The cylindrical tube 15 is fixedly connected with and communicated with the conical tube 14. A small end of the conical tube 14 is received in the cylindrical tube 15. An included angle α between each arc blade 12 and a respective flat plate 13 is an obtuse angle. The cyclone separator 10 is provided with four arc blades 12 and four flat plates 13, which are uniformly arranged at the large end of the conical tube 14 along a circumference of the large end to define four air inlets 21. The small end of the conical tube 14 is provided with four dust discharging openings 16 and one dust falling opening 17, and the number of the dust discharging openings 16 corresponds to the number of the air inlet openings 21. The separation structure further includes a dust cup 18, a dust-proof skirt 19, and a filter screen 20. The filter screen 20 is made from, for example, stainless steel. A bottom of the filter screen 20 is fixedly connected to the dust-proof skirt 19. The dust-proof skirt 19 and the filter screen 20 are received in the dust cup 18. A bottom of the cylindrical tube 15 abuts on a bottom wall of the dust cup 18.
In this embodiment, the included angle α between the arc blade 12 and the flat plate 13 is 95.5°. A primary separation may occur between a side wall of the dust cup 18 and the filter screen 20, a secondary separation and a tertiary separation may occur in the cyclone separator 10. Herein, the secondary separation occurs in a region from the connecting ring 11 to the plate 13, with a height H1, and the tertiary separation occurs in the conical tube 14 below a bottom of the plate 13, with a height H2. After entering the cyclone separator 10 from the air inlets 21, the air flow rotates in a high speed and meanwhile is accelerated downward, resulting in a good separation effect in the secondary separation and thus ensuring that the air flow enters the tertiary separation with a higher-speed rotating. The flow section of the conical tube 14 along a central axis is gradually reduced to ensure continuous acceleration of the rotating air flow, resulting in a better separation effect. The conical tube 14 is provided at its bottom the dust discharging openings 16 and the dust falling opening 17, with the number of the dust discharging openings 16 corresponding to the number of the air inlet 21, so that it is ensured that the fine dust is removed from the air flow more uniformly at the bottom.
Further, a height from an upper surface of the connecting ring 11 to a lower surface of the flat plate 13 is H1, i.e., the height for the secondary separation, and the height of the conical tube 14 is H2, i.e., the height of the tertiary separation, and a ratio of H2 to H1 is in a range of 2 to 3. The height of the filter screen is H3, and a ratio of H3 to H1 is in a range of 2 to 2.5. A maximum outer diameter of the air inlet 21 along the central axis is D1, that is, an outer diameter of the connecting ring 11 is D1, and an outer diameter of the filter screen is D2, and a ratio of D1 to D2 is in a range of 0.8 to 0.9. A distance from an outermost side of the dust-proof skirt to an inner side surface of the dust cup is D3, which is in a range of 6mm to 10mm.
In the present embodiment, the mixture of air and waste is sucked into the dust cup 18 from an inlet of the dust cup 18. A rotating air flow is first formed in a flow space between the side wall of the dust cup 18 and the filter screen 20. The primary separation is completed by a combined action of the centrifugal force and the filter screen 20, and a part of the waste with large volume is gradually deposited to the bottom of the dust cup 18. The air flow carrying small particles of the waste through the filter screen 20 enters the cyclone separator 10. Due to the special structural design of the cyclone separator 10, rotation of the air flow is speeded up, so that the small particles are completely separated from the air flow. The air flow enters a filter cotton of the dust cup 18 from a return pipe of the dust cup 18, is sucked and discharged with a motor of the dust cup 18. The small particles of the waste is gradually deposited to the cylindrical tube 15 at the bottom. The ratio of D1 to D2 is greater than 0.8 to ensure air intake efficiency. D3 is in the range of 6mm to 10mm, so as to prevent the waste at the bottom from floating up with stirring by the air flow.
It should be appreciated that the present disclosure may have various embodiments, and other embodiments obtained by those skilled in the art based on the embodiment in the present description without any creative effort fall within the protection scope of the present disclosure.

Claims

A separation structure for a dust cup of a vacuum cleaner comprising a cyclone separator, wherein the cyclone separator is provided with a connecting ring, a plurality of arc blades, a plurality of flat plates, a conical tube and a cylindrical tube, each of the plurality of arc blades has a top fixedly connected with the connecting ring and a bottom fixedly connected with a respective one of the plurality of flat plates, the plurality of flat plates are fixedly mounted at a large end of the conical tube, a plurality of air inlets are formed by gaps defined by the connecting ring, the plurality of arc blades and the a plurality of flat plates, the cylindrical tube is fixedly connected with and communicated with the conical tube, a small end of the conical tube is received in the cylindrical tube, and an included angle between each of the plurality of arc blades and the respective one of the plurality of flat plates is an obtuse angle.
The separation structure according to claim 1, wherein the cyclone separator is provided with four arc blades and four flat plates, the four arc blades and the four plates are uniformly arranged at the large end of the conical tube along a circumference of the large end to define four air inlets.
The separation structure according to claim 2, wherein the small end of the conical tube is provided with four dust discharging openings and one dust falling opening.
The separation structure according to claim 3, further comprising a dust cup, a dust-proof skirt, and a filter screen, wherein a bottom of the filter screen is fixedly connected to the dust-proof skirt, the dust-proof skirt and the filter screen are received in the dust cup, and a bottom of the cylindrical tube abuts on a bottom wall of the dust cup.
The separation structure according to claim 4, wherein a height from an upper surface of the connecting ring to a lower surface of the flat plate is H1, a height of the conical tube is H2, and a ratio of H2 to H1 is in a range of 2 to 3.
The separation structure according to claim 5, wherein a height of the filter screen is H3, and a ratio of H3 to H1 is in a range of 2 to 2.5.
The separation structure according to claim 6, wherein a maximum outer diameter of the air inlet along a central axis is D1, an outer diameter of the filter screen is D2, and a ratio of D1 to D2 is in a range of 0.8 to 0.9.
The separation structure according to claim 7, wherein a distance from an outermost side of the dust-proof skirt to an inner side surface of the dust cup is D3, which is in a range of 6mm to 10mm.