CN101449948A

CN101449948A - Cyclone system for dust collector and dust collector with the same

Info

Publication number: CN101449948A
Application number: CNA2007101904855A
Authority: CN
Inventors: 斯特凡·博科特; 陈酹滔
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd
Priority date: 2007-11-29
Filing date: 2007-11-29
Publication date: 2009-06-10
Anticipated expiration: 2027-11-29
Also published as: DE102008044184A1; CN101449948B

Abstract

The invention relates to a cyclone separating device (1) used on a dust collector (2), comprising a cyclone cavity (10) which is provided with an air current inlet (11), a side wall (12) and an end wall (13), wherein in use, the air flow including rubbish collected by the dust collector comes into the cyclone cavity (10) via the air flow inlet (11) and rotationally moves along the side wall (12); an immersionpipe (20), which immerses into the cyclone cavity (10) and is provided with a pipe mouth (21), through which the air flow separated by the cyclone can come into the immersionpipe (20) and leave the cyclone cavity (10); and a barrier element which is arranged between the pipe mouth (21) and the end wall (13); wherein, an air inlet (41) is formed between the pipe mouth (21) and the barrier element (30). Based on the prior cyclone separating device, the cyclone separating device (1) used on a dust collector (2) is characterized in that: the barrier element (30) is provided with an outer surface (31) which is continuous and which shrinks gradually to the top (32) of the barrier element (30) along the direction of the end wall (13) of the cyclone cavity (10). The cyclone separating device (1) can be applied in the dust collectors.

Description

Cyclone separation device for dust collector and dust collector with same

[ technical field ]

The invention relates to a cyclonic separating apparatus for a vacuum cleaner, comprising a cyclone chamber having an airflow inlet, a side wall and an end wall, wherein, in use, an airflow containing refuse drawn in by the vacuum cleaner enters the cyclone chamber through the airflow inlet and rotates along the side wall; a dip tube immersed in the cyclone chamber and having a nozzle through which the cyclonic airflow may enter the dip tube and exit the cyclone chamber; and a blocking element disposed between the spout and the end wall; wherein an air inlet is formed between the nozzle and the blocking element. The invention also relates to a vacuum cleaner having such cyclonic separating apparatus.

[ background art ]

Such cyclonic separating apparatus is known from us patent US6,896,711B2. According to the disclosure of the specification, such prior cyclonic separating apparatus comprises a debris barrier member which has a spherical surface and is constructed like an image plate. The inner surface of the blocking element faces the end wall of the cyclone chamber and the exiting airflow will collide with the inner surface of the blocking element so that the refuse contained in the airflow is blocked by the blocking element and falls into a refuse receptacle. A disadvantage of this cyclonic separating apparatus is that the debris which is retained by the retaining member may be recaptured by the airflow which subsequently exits the cyclone chamber. Thus, there is a higher probability that refuse will leave the cyclone chamber.

[ summary of the invention ]

It is therefore an object of the present invention to overcome the above problems of the prior art, and thereby separate the vast majority of the waste from the airflow, and in particular it should be possible that the risk that the finest particles can leave the cyclone chamber is minimised.

The present invention relates to a cyclone separating apparatus for a vacuum cleaner, comprising: a cyclone chamber having an airflow inlet through which an airflow containing debris drawn in by the cleaner enters the cyclone chamber and rotates along the side wall, a side wall and an end wall; a dip tube immersed in the cyclone chamber and having a nozzle through which the cyclonic airflow may enter the dip tube and exit the cyclone chamber; and a blocking element disposed between the spout and the end wall; wherein, form the air intake between the mouth of pipe and the barrier element, its characterized in that: the blocking member has an outer surface which is continuous and tapers to a top in a direction towards the end wall of the cyclone chamber.

Before the airflow enters the dipleg to leave the cyclone chamber, the airflow collides with the outer surface of the blocking element, whereby at least some of the particles contained in the airflow can be separated from the airflow by the collision and, due to the shape of the outer surface, the debris can move towards the side wall of the cyclone chamber. The dirt moving towards the side wall can be entrained in the incoming airflow containing the dirt and subjected to cyclonic separation again, whereby the separation efficiency of the cyclonic separating apparatus can be significantly improved.

Other features which are considered as characteristic for the invention, individually or in combination with other features, are set forth in the following appended claims.

According to an additional feature of the invention, the blocking element is arranged in association with the immersion tube.

Preferably, the blocking element is connected to the immersion tube by a connecting element, which is provided in one piece with the blocking element, thereby simplifying the assembly of the separation device.

According to a preferred embodiment of the invention, the blocking element is arranged in association with a cone arranged beside the end wall.

Preferably, the outer surface has a positive or negative curvature so that the air flow can be smoothly directed toward the side wall along the curvature.

Preferably, the blocking element is conical, which shape is particularly advantageous for the movement of the air flow.

According to an advantageous embodiment of the invention, the total area of the air inlet openings is greater than or substantially equal to the cross-sectional area of the immersion tube, so that no air pressure is lost due to the provision of the blocking element. As a particularly preferred way, the total area of the air inlet openings is substantially equal to the cross-sectional area of the dipleg, so that there is substantially the same air pressure at the air inlet openings and the inlet openings.

According to a further feature of the present invention, the sidewall is provided with a waste outlet through which the cyclone chamber is in fluid communication with a waste receptacle. Preferably, the side wall forms part of the waste container.

According to a particularly preferred embodiment of the invention, the waste outlet has a boundary which is closest to the nozzle in the axial direction of the cyclone chamber, wherein at least a portion of the blocking element is located between the nozzle and the boundary.

The invention is suitable for the dust collector.

The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

[ description of the drawings ]

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Wherein,

figure 1 is a cross-sectional view of cyclonic separating apparatus according to a preferred embodiment of the invention.

Figure 2 is a perspective view of a vacuum cleaner incorporating cyclonic separating apparatus in accordance with a preferred embodiment of the invention.

[ description of the preferred embodiments ]

In the following detailed description of the preferred embodiments, like or similar features have like reference numerals.

Please refer to the drawings, and particularly to fig. 1. Figure 1 shows cyclonic separating apparatus 1 according to a preferred embodiment of the invention. The cyclonic separating apparatus 1 comprises a cylindrical cyclone chamber 10 and a dipleg 20. The cyclone chamber 10 has an airflow inlet 11, a side wall 12 and an end wall 13. In use, an airflow containing debris enters the cyclone chamber 10 through the airflow inlet 11 and moves rotationally along the side wall 12. A debris outlet 15 is formed in the side wall 12 and the cyclone chamber 10 is in fluid communication with the debris receptacle 50 via the debris outlet 15 such that debris can be separated from the airflow by centrifugal force and collected in the debris receptacle 50. Preferably, the side wall 12 forms part of a waste receptacle 50. A cone 14 is provided within the cyclone chamber 10 adjacent the end wall 13. Preferably, the cone 14 is formed as part of said end wall 13. In this embodiment, the end wall 13 is provided as a separate component from the cyclone chamber 10. Preferably, the end wall 13 is removably mounted on the cyclonic separating apparatus 1. A dipleg 20 is submerged in the cyclone chamber 10 and has a mouth 21 through which the cyclonic separated airflow reflected by the end wall 13 can enter the dipleg 20 to exit the cyclone chamber 10.

A blocking element 30 is provided between the mouth 21 of the dip tube 20 and the end wall 13 of the cyclone chamber 10. The blocking element 30 is spaced from the mouth 21 of the dipleg 20 such that an air inlet 41 is formed between said mouth 21 and the blocking element 30, such that the cyclone chamber 10 is in fluid communication with the dipleg 20 via said air inlet 41. Through the air inlet 41, the cyclonic airflow enters the dipleg 20 via the nozzle 21 and leaves the cyclone chamber 10 thereafter.

The blocking member 30 has an outer surface 31, the outer surface 31 being continuous and tapering to a top 32 in a direction towards the end wall 13 of the cyclone chamber 10. Preferably, the blocking element 30 is hollow and conical.

A blocking element 30 is arranged in connection with the immersion tube 20. In particular, the blocking element 30 is connected to the immersion tube 20 by means of a connecting element 40. Said connecting element 40 is connected at one end to the peripheral wall of the immersion tube 20 and at its other end to the bottom edge of the blocking element 30. Preferably, the connection element 40 is of unitary construction with the blocking element 20, such that the blocking element 30 can be easily arranged within the cyclone chamber 10 by connecting the connection element 40 to the dip tube 20. In the embodiment shown in fig. 1, the blocking element 30, the connecting element 40 and the immersion tube 20 are integrally formed. However, in an alternative embodiment, the blocking element 30 may also be provided separately from the immersion tube 20 and then assembled together.

Although not shown, in another embodiment, the blocking element 30 may also be connected to the cone 15.

The connecting element 40 is arranged in such a way that: it allows the total area of the air inlet 41 between the blocking element 30 and the mouth 21 of the dipleg 20 to be greater than or substantially equal to the cross-sectional area of the dipleg 20, thus avoiding the air pressure loss caused by the arrangement of the blocking element 30.

The outer surface 31 of the blocking element 30 has a curvature 33 so that the flow of air can be guided by the curvature 33 to facilitate its movement towards the side wall 12, the curvature 33 being negative in this embodiment. However, the curved portion 33 may also be positive.

In the present embodiment, the top 32 of the blocking element 30 extends to such an extent that: it overlaps the waste outlet 15 in a direction perpendicular to the axis a of the cyclone chamber 10. However, at least part of the blocking element 30 is not exposed to the waste outlet 15, i.e. at least part of the blocking element 30 is located between the nozzle 21 and a boundary 16 of the waste outlet 15, wherein the boundary 16 is closest to the nozzle 21 in the direction of the axis A of the cyclone chamber 10. In an alternative embodiment, none of the blocking element 30 is exposed to the waste outlet 15.

The invention is suitable for the dust collector. Figure 2 shows a vacuum cleaner 2. The cleaner 2 comprises a main body 5, a suction nozzle (not shown) for sucking air containing debris, a motor-driven fan (not shown) for generating suction and arranged in a compartment of the main body, and cyclonic separating apparatus 1. An air flow path is formed between the cleaner head and the motor-driven fan. The cyclonic separating apparatus 1 is arranged in the airflow path to separate debris from the airflow before the airflow enters the compartment. The suction nozzle may be connected to the main body 5 by a hose or may be directly connected to the main body 5.

In use, a dirt-laden airflow drawn in by the cleaner 2 enters the cyclone chamber 10 through the airflow inlet 11 and the cyclonic separation process commences. In particular, the airflow loaded with waste is spirally rotated along the side wall 12 in a direction towards the end wall 13. Thus, most of the refuse, especially the heavier refuse, is separated from the airflow by the centrifugal force through the refuse outlet 15 in the side wall 12 and collected in the refuse receptacle 50. The airflow containing the remaining waste (e.g. dust particles, etc.) is reflected back by the end wall 13 and rotates helically with a smaller diameter of rotation towards the mouth 21 of the dipleg 20. Before the airflow enters the dipleg 20 to leave the cyclone chamber 10, the airflow collides with the outer surface 31 of the blocking member 30, so that at least part of the garbage contained in the airflow is separated from the airflow by the collision, and the garbage moves towards the sidewall 12 of the cyclone chamber 10 due to the shape of the blocking member 30, and the airflow after the garbage separation enters the dipleg 20 through the air inlet 41 to leave the cyclone chamber. These refuse moving towards the side wall 12 will be entrained by the incoming air flow carrying the refuse rotating helically along the side wall 12. Thus, the separated refuse by the blocking elements 30 is again subjected to the cyclonic separation process, thereby significantly improving the refuse separation efficiency of the cyclonic separating apparatus 1.

After leaving the cyclone chamber 10 through the dip tube 20, the airflow flows towards a compartment provided with a motor driven fan (not shown). Preferably, a filter 60 is provided in the air path between the cyclonic separating apparatus 1 and the motor-driven fan to filter the finest particles remaining in the airflow. It is noted that it is also possible to arrange a further cyclonic separation stage before the filter 60, or to replace said filter 60 with the further cyclonic separation stage.

List of reference numerals

1 cyclonic separating apparatus

2 dust collector

5 main body

10 cyclone chamber

11 gas flow inlet

12 side wall

13 end wall

14 conical body

15 garbage outlet

20 dip tube

21 dip tube 20 spout

30 blocking element

31 blocking the outer surface of the element 30

32 blocking the top of the element 30

40 connecting element

41 air inlet

50 refuse receptacle

60 filter

Claims

1. Cyclonic separating apparatus (1) for a vacuum cleaner (2), comprising:

a cyclone chamber (10), the cyclone chamber (10) having an airflow inlet (11), a side wall (12) and an end wall (13), in use, an airflow containing debris drawn in by the cleaner entering the cyclone chamber (10) through the airflow inlet (11) and rotating along the side wall (12);

a dipleg (20) which is submerged in the cyclone chamber (10) and has a nozzle (21) through which the cyclonic airflow can enter the dipleg (20) and exit the cyclone chamber (10); and a blocking element (30) arranged between the spout (21) and the end wall (13);

wherein an air inlet (41) is formed between the nozzle (21) and the blocking element (30);

the method is characterized in that:

the blocking element (30) has an outer surface (31), the outer surface (31) being continuous and tapering to a top (32) in a direction towards the end wall (13) of the cyclone chamber (10).

2. Cyclonic separating apparatus (1) as claimed in claim 1, wherein: the blocking element (30) is arranged in association with the immersion tube (20).

3. Cyclonic separating apparatus (1) as claimed in claim 1 or 2, characterized in that: the blocking element (30) is connected to the immersion tube (20) by means of a connecting element (40), the connecting element (40) being provided in one piece with the blocking element (30).

4. Cyclonic separating apparatus (1) as claimed in any one of claims 1 to 3, wherein: the blocking element (30) is arranged in association with a cone (14), the cone (14) being arranged alongside the end wall (13).

5. Cyclonic separating apparatus (1) as claimed in any one of the preceding claims, wherein: the outer surface has a positively or negatively curved portion (33).

6. Cyclonic separating apparatus (1) as claimed in any one of the preceding claims, wherein: the blocking element (30) is conical.

7. Cyclonic separating apparatus (1) as claimed in any one of the preceding claims, wherein: the total area of the air inlet openings (41) is greater than or substantially equal to the cross-sectional area of the dipleg (21).

8. Cyclonic separating apparatus (1) as claimed in any one of the preceding claims, wherein: the side wall (12) is provided with a waste outlet (15), and the cyclone chamber (10) is in fluid communication with a waste container (50) through the waste outlet (15).

9. Cyclonic separating apparatus (1) as claimed in claim 8, wherein: the waste outlet (15) has a boundary (16) closest to the nozzle (21) in an axial direction of the cyclone chamber (10), wherein at least a portion of the blocking element (30) is located between the nozzle (21) and the boundary (16).

10. Cyclonic separating apparatus (1) as claimed in claim 8, wherein: the side wall (12) forms part of the waste container (50).

11. A vacuum cleaner comprising cyclonic separating apparatus (1) as claimed in any one of the preceding claims.