DE20109699U1 - Divided vortex dust filter for a vacuum cleaner - Google Patents

Description

Divided vortex dust filter for a vacuum cleaner

The present utility model discloses a divided vortex dust filter for a vacuum cleaner, having a container, a dirty air inlet and a clean air outlet arranged on the container. The container is divided into a coarse dirt chamber and a fine dirt chamber. A rotary insert is arranged in the coarse dirt chamber. A shielding tube is arranged in the rotary insert. The dirty air inlet is arranged at the top of the coarse dirt chamber. A rotary cone profile is arranged in the fine dirt chamber. A clean air outlet is arranged at the top of the rotary cone profile. A guide tube connected to the rotary cone profile is arranged at the top of the shielding tube. The divided vortex dust filter for a vacuum cleaner according to the present utility model uses a filter mechanism that differs from that of a known vacuum cleaner. By using the divided vortex dust filter, the polluted air is filtered more effectively without increasing the dust collection resistance of the engine and also offers greater comfort to the end user.

The present utility model relates to a vacuum cleaner.

Common vacuum cleaners use a filter hood or dust bag to filter the dirty air sucked in by the vacuum cleaner motor and to retain the dust in the dust collection insert or dust bag. After a certain period of use, the end user must clean or replace the filter hood or dust bag. Otherwise, the filter grille of the filter hood or dust bag may become clogged with fine dust. This may increase the dust filter resistance of the vacuum cleaner motor, which may even lead to the destruction of the motor. Therefore, common vacuum cleaners have many structural deficiencies. These may not only cause some inconvenience to the end user, but also have a negative impact on the performance of the vacuum cleaner.

The object of the present utility model is to provide a divided vortex dust filter for a vacuum cleaner which has a modified filter mechanism compared to the known vacuum cleaners. By using the divided vortex dust filter according to the present utility model, the polluted air is filtered more efficiently without increasing the dust collection resistance of the motor and also offers more convenience to the end user.

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DTS Munich 31215.KAN. GIlODE .&iacgr;. ..'*..' *

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According to one aspect of the present utility model, it provides a divided vortex dust filter for vacuum cleaners, which has a container, a dirty air inlet and a clean air outlet, both of which are formed on the container. The container is divided into a coarse dirt space and a fine dirt space. A rotary insert is arranged at the upper part of the coarse dirt space. A shield tube is arranged in the rotary insert coaxially therewith. The dirty air inlet is arranged at the top of the coarse dirt space so as to communicate with the space formed between the rotary insert and the shield tube. A rotary cone profile having an opening at its bottom is arranged in the fine dirt space. The rotary cone profile is arranged at a distance from the bottom of the container. A clean air outlet is formed at the upper end of the rotary cone profile. A guide tube, which is connected to the upper part of the rotary cone profile, is arranged at the top of the shielding tube and projects into the rotary cone profile in a tangential direction.

According to another aspect of the present utility model, this provides a divided vortex dust filter for vacuum cleaners, comprising a container. A dirty air inlet and a clean air outlet are formed on the container. The container is divided into a coarse dirt space and a fine dirt space. A rotary insert is arranged at the upper part of the coarse dirt space. A shield tube is arranged in the rotary insert coaxially therewith. The dirty air inlet is arranged on the surface of the coarse dirt space so as to communicate with the space formed between the rotary insert and the shield tube. A rotary cone profile having an opening at its lower end is arranged in the fine dirt space. The rotary cone profile is arranged at a distance from the bottom of the container. A clean air outlet is formed at the top of the rotary cone profile. A guide tube connected to the upper part of the rotary cone profile is arranged on the top of the shield tube and protrudes into the rotary cone profile in a tangential direction. The container comprises a lid and a dust container, between which a partition is arranged. The dirty air inlet, the clean air outlet and the guide tube are formed on the lid. The rotary insert and the rotary cone profile are arranged on the bottom of the partition. A sealing plate is arranged under the dirty air inlet and the guide tube. The shield tube is arranged under the sealing plate.

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DTS Munich 31215.KAN. GIlODE

17.07.2001 S/Br/ma

According to another aspect of the present invention, there is provided a divided vortex dust filter for vacuum cleaners, comprising a container. A dirty air inlet and a clean air outlet are formed on the container. The container is divided into a coarse dirt space and a fine dirt space. A rotary insert is formed at the upper part of the coarse dirt space. A shield tube is arranged in the rotary insert coaxially therewith. The dirty air inlet is arranged on the surface of the coarse dirt space so as to communicate with the space formed between the rotary insert and the shield tube. A rotary cone profile having an opening at its bottom is arranged in the fine dirt space. The rotary cone profile is arranged at a distance from the bottom of the container. A clean air outlet is formed at the top of the rotary cone profile. A guide tube connected to the upper part of the rotary cone profile is arranged on the top of the shielding tube and projects tangentially into the rotary cone profile. The container has a lid and a dust container, between which a partition is arranged. The dirty air inlet, the clean air outlet and the guide tube are formed on the lid. The rotary insert and the rotary cone profile are formed on the underside of the partition. A sealing plate is arranged under the dirty air inlet and the guide tube. The shielding tube is arranged under the sealing plate. A spiral flow guide plate is arranged on the front surface of the upper part of the shielding tube to set the incoming dirty air into a vortex-shaped flow. The shielding tube is as deep as the rotary insert. The bottom of the shielding tube is closed and a cone is arranged on its front side to prevent the submerged coarse dirt from clumping together again. A convex cylinder connected to the rotary cone profile via a guide device is arranged in the opening at the bottom of the rotary cone profile so that the fine dust cannot re-enter the rotary cone profile. An outlet duct extending downward is arranged at the clean air outlet and arranged coaxially with the rotary cone profile. An air flow protector is formed on the side of the guide tube. The dust container is divided into a coarse dirt space and a fine dirt space by an arcuate partition wall. A sealing sponge is arranged between the upper end surface of the arcuate partition wall and the partition wall.

The present utility model has the following advantages:
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1. By adopting the vortex separation principle, the vacuum cleaner of the present utility model separates the incoming dirty air into dust and clean air.

DTSMunich 31215.KAN. GIlODE · ^; · ··"" * 47&digr;4 "*

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It retains the dust in the dust container and expels the clean air through the outlet. The separation is carried out more effectively.

2. According to the vacuum cleaner of the present utility model, a coarse dirt chamber and a fine dirt chamber are provided. The two chambers provide a double separation option for the dirty air, so that the separation of dust from the dirty air is carried out thoroughly.

Short description of the drawings

Figure 1 is an exploded view of the present utility model;

Figure 2 is a longitudinal section through the present utility model;

Figure 3 is the bottom view of the lid of the present utility model

sters;

Figure 4 is a top view of the dust container of the present utility model;
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Figure 5 shows a view of the flows in the present utility model.

The numbers used below mean:

1. Container

2. Inlet for dirty air

3. Outlet for clean air

4. Coarse dirt room

5. Fine dirt room
6. Rotation insert

7. Shielding tube

8. Rotation cone profile

9. Guide tube

10. Lid

11. Dust container

12. Partition wall

13. Sealing plate

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14. Spiral guide plate

15. Cone

16. Guide device

17. Convex cylinder
18. Exhaust port

19. Air flow protection

20. Radial partition wall

21. Sealing sponge

The present utility model is described in more detail below with reference to the accompanying drawings.

According to the figures, the divided vortex dust filter for vacuum cleaners of the present utility model comprises a container 1. A dirty air inlet 2 and a clean air outlet 3 are arranged on the container 1. The container 1 is divided into a coarse dirt space 4 and a fine dirt space 5. A rotary insert 6 is arranged in the upper part of the coarse dirt space 4. A shielding tube 7 is arranged coaxially therewith in the rotary insert 6. The dirty air inlet 2 is arranged on the top of the coarse dirt space 4 at a position which is connected to the space between the rotary insert 6 and the shielding tube 7. A rotary cone profile 8 having an opening at its bottom is arranged in the fine dirt space 5. The rotary cone profile 8 is arranged at a distance from the bottom of the container 1. A clean air outlet 3 is formed on the top of the rotary cone profile 8. A guide tube 9, which is connected to the upper part of the rotary cone profile 8, is arranged on the upper side of the shielding tube 7 and projects into the rotary cone profile 8 in a tangential direction. The container 1 further comprises a lid 10 and a dust container 11, which are separated from each other by a partition wall 12. The inlet 2 for the dirty air, the outlet 3 for the clean air and the guide tube 9 are formed on the lid 10. The rotary insert 6 and the rotary cone profile 8 are arranged on the underside of the partition wall 12. A sealing plate 13 is arranged below the inlet 2 for the dirty air and below the guide tube 9. The shielding tube 7 is arranged below the sealing plate 13. A spiral air guide plate 14 is arranged on the end face of the upper part of the shielding tube 7 in order to set the incoming air into a vortex flow. The shielding tube 7 is designed to be as deep as the rotary insert 6. The bottom of the shielding tube 7 is closed and a cone 15 is arranged on the front surface to prevent the submerged coarse dust from clumping together again. A convex cylinder 17, which is connected to the rotary cone profile 8

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connected by a guide device 16 is arranged in the opening at the bottom of the rotary cone profile 8 to prevent the fine dust from re-entering the rotary cone profile 8. An outlet channel 18 extending downward is arranged at the outlet 3 for the clean air and is formed coaxially with the rotary cone profile 8. An air flow protector 19 is formed on the side of the guide tube 9. The dust container 11 is divided by an arcuate dividing wall 20 into a coarse dirt space 4 and a fine dirt space 5. A sealing sponge 21 is arranged between the lower end face of the arcuate dividing wall 20 and the partition wall 12.

The vacuum cleaner of the present utility model comprises two independent vortex dust filters. The first is the coarse dust filter, which essentially comprises an inlet 2 for the dirty air, a shielding tube 7, a rotary insert 6 and a coarse dirt chamber 4. The second is a fine dirt filter, which essentially comprises a guide tube 9, a rotary cone profile 8, an outlet 3 for clean air and a fine dirt chamber 5.

During operation, the dirty air containing dust flows into the coarse dirt space 4 through the dirty air inlet 2 and circulates along the inner wall of the rotary insert 6 by the guide of the spiral guide plate 14. Due to the centrifugal force, the dust is collected on the inner wall of the rotary insert 6 while the air is sucked into the center of the shielding pipe 7. Since the rotary insert 6 is not connected to the bottom of the dust container 11, most of the dust will gradually settle on the bottom of the coarse dirt space 4 due to gravity and centrifugal force. When the dust rotates downward and leaves the rotary insert 6, it loses its grip on the rotary insert 6. Since the rotary insert 6 and the dust container 11 are not arranged coaxially with each other and the cross section for retaining the deposit is irregular, the coarse dust can no longer rotate quickly. When it hits the dust container 11, it precipitates. At the same time, the cone 15 arranged under the shielding tube 7 has the function of stopping the dust. This further improves the effect of removing the dust; the air and the remaining fine dust move upwards and away from the coarse dirt space 4 through the shielding tube 7.

A number of openings are formed on the shielding tube 7 through which air carrying fine dust passes. This air flows upwards through the guide tube 9 and leaves the coarse dirt chamber 4. The outflowing air flows via the guide tube 9 from the coarse dirt chamber 4 into the fine dirt chamber 5 along the inner wall of the rotary

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DTS Munich 31215.KAN. Gl IODE

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ons cone profile 8 in a tangential direction. The air and the fine dust rotate in the rotary cone profile 8 and form a vortex-shaped flow. This further separates the fine dust and the air from each other. The fine dust accumulates along the inner wall of the rotary cone profile 8 and passes through the gap between the side wall of the convex cylinder 17, which has a guide device 16, and the inner wall of the rotary cone profile 8. In doing so, it enters the lower part of the fine dirt space 5. The clean air flows upwards in the middle of the rotary cone profile 8 and leaves the fine dirt space 5 through the outlet channel 18 and the outlet 13 for clean air.

On the side of the guide tube 9, an air flow protector 19 is arranged which communicates with the outside air. When the vacuum cleaner is running under normal working conditions, the air flow protector 19 is not active. When the perforations of the shielding tube 7 are blocked or the outlet channel 18 of the rotary cone profile 8 does not function normally due to some reason, the air flow protector 19 opens to let the outside air flow directly into the outlet channel 18 so that the motor continues to operate normally.

The critical dimensions of some elements of the present utility model are given below:

1. The diameter and number of holes in the shielding tube 7

The diameter and number of perforations of the shielding tube 7 directly influence the effects of dust filtering by the shielding tube 7 in the coarse dirt space 4. Experiments have shown that the diameter of a perforation is particularly preferably in the range of 1.5 to 2.0 mm. If the diameter of the perforations is in this range, dust with large diameters can be effectively prevented from entering the fine dirt space 5. The larger the number of perforations, that is, the larger their proportion of the total surface, the less pressure is on the individual perforations. This reduces the probability of perforations being clogged by the relatively light waste. The diameter of the shielding tube 7 is 40 mm and the height of the shielding tube 7 is 64 mm. According to an embodiment of the present utility model, 21 rows of perforations are formed on the shielding tube 7 and there are 36 perforations in most rows. The total number of breakthroughs is 600. The total area of the breakthroughs

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DTS Munich 31215.KAN. GIlODE ·* δ7idiagr;*4

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The openings are approximately 1884 mm ² , which is larger than the area of the dirty air inlet 2 (the area for the dirty air inlet is approximately 961.6 mm ² ). The openings effectively prevent larger dust particles from entering the fine dirt chamber 5.
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2. The wall thickness of the shielding tube 7

It has been found that the best results are obtained when the wall thickness is in the range of 1.5 to 2.0 mm. Based on the embodiment of the present utility model, it has been found that due to the small diameter, the wall thickness can be kept relatively small. It is approximately 1.5 mm.

3. The distance between the lower face of the rotary cone profile 8 and the dust container 11

The distance of the lower face of the rotary cone profile 8 from the dust container 11 should be considerable. If the distance is too small, the dirty air would be sucked in from the outgoing exhaust duct 18, which affects the removal of the dust. If the distance is too large, the wall inclination of the rotary cone profile is affected, which also affects the removal of the dust. Experimental results show that the preferred distance is in the range of 8 to 80 mm.

4. The opening angle of the rotary cone profile 8 and the diameter of the upper and lower connection

The opening angle of the rotary cone profile 8 greatly affects the efficiency of dust filtration. The included angle (between the inner wall and the vertical) should be in the range of 10 to 20°. If the opening angle is too large or too small, the rotation speed will change, thus affecting the effectiveness of dust filtration. The diameter of the upper port should not be too small. Otherwise, the space for air rotation is too small, which may cause the air to exit through the outlet duct 18 arranged on the cover 10 without being thoroughly cleaned, which affects the efficiency of dust removal. The diameters should not be smaller than 60 mm. The diameter of the small port should be in the range of 15 to 36 mm, observing the above opening angle.

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5. The diameter of the inlet 2 for dirty air

The diameter of the dirty air inlet 2 is 35 mm and the area of the opening is 961.6 mm ² .

6. The distance between the inner wall of the rotary insert 6 and the shielding tube?

The distance between the inner wall of the rotary insert 6 and the shielding tube 7 is 24.8 mm. This is also the distance of the space for the dirty air to rotate. This is a parameter that has a great influence on dust removal. It should be in the range of 12 to 28 mm. If the distance is too small, the dirty air cannot rotate freely, which may cause the holes in the shielding tube 7 to be blocked, thus affecting the effect of dust filtration.

7. The size of the convex cylinder 17 with the guide device 16 in the rotary cone profile 8

If the dimensions of the convex cylinder 17 with the guide device 16 are too large, the path for the air flow becomes too small. Then the convex cylinder 17 cannot prevent the small dust particles from returning to the rotary cone profile 8. The distance from the side wall of the convex cylinder 17 to the lower connection of the rotary cone profile 8 has a great influence on the effect of dust cleaning. It should be in the range of 3 to 10 mm. The height of the convex cylinder 17 is in the range of 10 to 20 mm. The guide device 16 is provided to support the convex cylinder 17 and at the same time guide the small dust particles into the lower part of the dust container. The heel angle should correspond to the rotation direction of the rotating air flow.

8. The ratio of the inner diameter of the outlet channel 18 to the diameter of the upper connection of the rotary cone profile 8 should be significantly smaller than 1:1.

Experiments have shown that a better dust filtering effect is achieved when this ratio is in the range of 1:2 to 1:4. At the same time, the length of the outlet channel 18 inserted into the rotary cone profile 8 (the distance from the lower

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front face of the outlet channel 18 to the upper front face of the rotary cone profile 8) must be in a range of 5 to 25 mm, otherwise the effect of dust filtration decreases significantly.

It is clear to those skilled in the art that the present utility model is not limited to the above-mentioned embodiment. It goes without saying that any modification, change and improvement that does not lie outside the inventive concept of the present utility model fall within the scope of protection defined by the following claims.

Claims (16)

1. Divided vortex dust filter for vacuum cleaners with a container ( 1 ), an inlet ( 2 ) for dirty air and an outlet ( 3 ) for clean air, which are formed on the container ( 1 ), characterized in that the container ( 1 ) is divided into a coarse dirt chamber ( 4 ) and a fine dirt chamber ( 5 ), has a rotary insert ( 6 ) arranged on the upper part of the coarse dirt chamber ( 4 ), that a shielding tube ( 7 ) is arranged coaxially thereto in the rotary insert ( 6 ), that the inlet ( 2 ) for the dirty air is arranged on the upper side of the coarse dirt chamber ( 4 ) at a location which aims into the space between the rotary insert ( 6 ) and the shielding tube ( 7 ), that a rotary cone profile ( 8 ) with an opening at its lower end is arranged in the fine dirt chamber ( 5 ), that the rotary cone profile ( 8 ) is arranged at a distance from the bottom of the container ( 1 ), that the outlet ( 3 ) for clean air is arranged at the upper end of the rotary cone profile ( 8 ), that a guide tube ( 9 ) communicates with the upper part of the rotary cone profile ( 8 ) and is arranged at the upper part of the shielding tube ( 7 ), and that the guide tube ( 9 ) projects tangentially into the rotary cone profile ( 8 ). 2. A divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the container ( 1 ) has a lid ( 10 ) and a dust container ( 11 ) between which a partition wall ( 12 ) is arranged, that the inlet ( 2 ) for the dirty air, the outlet ( 3 ) for the clean air and the guide tube ( 9 ) are arranged on the lid ( 10 ), that the rotary insert ( 6 ) and the rotary cone profile ( 8 ) are arranged on the underside of the partition wall ( 12 ), that a sealing plate ( 13 ) is arranged under the inlet ( 2 ) for the dirty air and under the guide tube ( 9 ), and that the shielding tube ( 7 ) is arranged under the sealing plate ( 13 ). 3. A divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that a spiral air guide plate ( 14 ) is arranged on the end face of the upper part of the shielding tube ( 7 ) to convert the incoming dirty air into a vortex flow. 4. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the shielding tube ( 7 ) projects as far down as the rotary insert ( 6 ), that the bottom of the shielding tube ( 7 ) is closed and a cone ( 15 ) is arranged on its front surface in order to prevent the sunken coarse dust from clumping together. 5. A divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that a convex cylinder ( 17 ) connected to the rotary cone profile ( 8 ) via a guide device ( 16 ) is arranged at the opening in the bottom of the rotary cone profile ( 8 ) to prevent fine dust from re-entering the rotary cone profile ( 8 ). 6. A divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that an outlet channel ( 18 ) extending downward is arranged at the clean air outlet ( 3 ), and that the outlet channel ( 18 ) is arranged coaxially with the rotary cone profile ( 8 ). 7. A divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that an air flow protector ( 19 ) is arranged on the side of the guide tube ( 9 ). 8. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the dust container ( 11 ) is divided by an arcuate dividing wall ( 20 ) into a coarse dirt chamber ( 4 ) and a fine dirt chamber ( 5 ) and that a sealing sponge ( 21 ) is arranged between the upper end face of the arcuate dividing wall ( 20 ) and the partition wall ( 12 ). 9. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the diameter of the openings on the shielding tube ( 7 ) is particularly preferably in the range of 1.5 to 2.0 mm. 10. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the wall thickness of the shielding tube ( 7 ) is preferably in the range of 1.5 to 2.0 mm. 11. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the distance of the lower end of the rotary cone profile ( 8 ) to the bottom of the dust container ( 11 ) is preferably in the range of 8 to 30 mm. 12. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the angle enclosed by the inner wall of the rotary cone profile ( 8 ) and the vertical is particularly preferably in a range of 10 to 20°, that the diameter of the upper connection is at least 60 mm and that the diameter of the lower connection is particularly preferably in the range of 15 to 36 mm. 13. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the diameter of the inlet ( 2 ) for the dirty air is particularly preferably 35 mm. 14. Divided vortex dust filter for a vacuum cleaner according to claim 1, characterized in that the distance between the rotary insert ( 6 ) and the shielding tube ( 7 ) is particularly preferably in the range of 12 to 28 mm. 15. Divided vortex dust filter for a vacuum cleaner according to claim 5, characterized in that the height of the convex cylinder ( 17 ) is particularly preferably in the range of 10 to 20 mm, and that the opening between the convex cylinder ( 17 ) and the rotary cone profile ( 8 ) is particularly preferably in a range of 3 to 10 mm. 16. Divided vortex dust filter for a vacuum cleaner according to claim 6, characterized in that the ratio of the diameter of the outlet channel ( 18 ) to the diameter of the upper connection of the rotary cone profile ( 8 ) is particularly preferably in the range from 1:2 to 1:4, and that the distance between the lower end face of the outlet channel ( 18 ) and the upper end face of the rotary cone profile ( 8 ) is particularly preferably in the range from 5 to 25 mm.