EP2842470B1 - Eddy tube separator with ejection opening for coarse dirt - Google Patents

Description

Field of the invention

The invention relates to a Wirbelrohrabscheider for a vacuum cleaner, wherein the Wirbelrohrabscheider comprises a separation chamber and a dust collection space, which are interconnected by a first ejection opening, wherein the first ejection opening has a region with a first gap. The invention further relates to a vacuum cleaner.

Background of the invention

The European patent application EP 1 681 099 A2 discloses a cyclone dust removal apparatus comprising a cyclone chamber and a dirt collection chamber connected by an annular spout. In this case, cyclone chamber and dirt collecting chamber are formed as concentric cylindrical chambers. The Zyklonstaubabscheidevorrichtung comprises an annular wall arranged on the lid, which is intended to prevent dust from the dirt collecting chamber back into the cyclone chamber.

In the European patent application EP 1 371 318 A2 We disclose an electric vacuum cleaner equipped with a combination of a cyclone separation cylinder and a dust collection container, wherein cyclone separation cylinders and dust collection containers communicate with each other via an opening and can be removed separately from the vacuum cleaner. The sucked air is first passed through the cyclone separation cylinder and pre-cleaned and can then be cleaned by filter elements which are arranged in the dust collector.

The European patent application EP 1 743 558 A2 discloses a dust collecting device for a vacuum cleaner, which consists of a housing, a cyclone unit and a dust collecting part, wherein the housing has a substantially semicircular shape. On a bottom surface of the cyclone unit, an air inlet and an air outlet are arranged parallel to each other.

The European patent application EP 1 938 734 A2 discloses a dust collection device for a vacuum cleaner comprising a cyclone chamber surrounded by a dust collection chamber, the cover of the dust collection chamber having an inwardly directed towards the center of the cyclone chamber substantially spherical bulge. By the bulge and by an additional annular skirt between the inner cyclone chamber and the outer dust collection chamber, it can be prevented that dust from the dust collection chamber gets back into the cyclone chamber. In addition, the bulge is to increase the centrifugal force acting on the dust in an upper region of the cyclone chamber.

The international patent application WO 2009/026710 A1 discloses a vacuum cleaner with a cyclone separator, the side walls of which taper towards an upper end, wherein the entrained in the air dust is passed via an impact surface in a dust collector surrounding the cyclone. The distance between the impact surface and the outlet opening of the cyclone separator is constant along the circumference of the outlet opening.

The international patent application WO 2010/044541 A2 describes a dust collector arranged in a vacuum cleaner, which separates dust from dust-laden air and discharges the filtered air to the outside. The dust collecting device includes a cyclone unit and a dust collecting unit that contains the dust ejected from the cyclone unit, and a dust collecting space of the dust collecting unit may vary.

The European patent application EP 2 201 880 A2 describes a vacuum cleaner with a removable Staubabscheideeinheit. The vacuum cleaner comprises a vacuum cleaner housing, a Staubabscheideeinheit for separating the dust from the air and a housing formed in the nipple housing, which is intended to removably attach the Staubabscheideeinheit to the nipple housing. When the dust collecting unit is inserted into the receptacle, the dust collecting unit forms part of the external appearance of the sucker housing.

The US patent application US 2004/0060146 A1 describes a debris collection system for a floor care appliance. The debris collection system includes a debris cup formed by a cylindrical side wall having a disk-shaped portion that divides the debris cup into an upper portion and a lower portion. The dirty air flow flows from the upper portion past the disc-shaped part through a narrow gap between the outer edge of the disc-shaped part and the Side wall of the dirt cup in the lower section. The disc-shaped member is supported by a centrally located tube having apertured walls both above and below the disc-shaped member. The apertured walls allow the airflow to flow into the pipe. The apertured wall above the disc-shaped member improves long-term performance by allowing the airflow to continue to flow through the dirt cup as the lower portion of the dirt cup fills with large particles of dirt and the apertured wall below the disc shaped member increases is closed.

The US patent application US 2002/0062632 A1 describes a cyclone dust collecting device for a vacuum cleaner. The cyclone collecting device comprises a cyclone body for connection to a telescoping extension tube of the vacuum cleaner, the cyclone body producing a swirling flow from an inflow of air and contaminants, and a cyclone housing detachably connected to the cyclone body, the cyclone housing having a spiral partition comprising the cyclone body Interior of the cyclone housing divided into an upper area for separating the contaminants from the air by guiding the vortex flow of air and a lower area for collecting the pollution separated from the air.

The US patent US Pat. No. 6,896,720 B1 describes an apparatus for separating particulate matter from an air stream, the apparatus comprising a housing having a particulate air inlet and a purified air outlet, the apparatus comprising a primary swirl generator for the inlet air, and wherein the housing has a separation zone with first and a second separation chamber, each associated with a respective particle collector, and including a connector, the connector being configured to generate a second vortex in the second separation chamber.

The problem underlying the invention

The invention has for its object to provide a comparison with the prior art improved Wirbelrohrabscheider for vacuum cleaners, wherein the Wirbelrohrabscheider comprises a separation chamber and a dust collection chamber. In particular, the invention makes it possible to provide a coarse dirt ejection window, whereby a clogging of the ejection openings avoided and a more uniform filling of the dust collection chamber is to be achieved. In addition, an improved vacuum cleaner is to be provided.

Inventive solution

The solution of the object is achieved by providing a Wirbelrohrabscheiders for a vacuum cleaner, wherein the Wirbelrohrabscheider comprises a separation chamber and a dust collection space, which are interconnected by a first ejection opening, wherein the first ejection opening is formed as an ejection gap between an ejection edge and a top surface the top surface is an inner surface of a lid closing the vortex tube separator, the ejection gap defining an area with a first gap dimension and
has an area with a further gap that is greater than the first gap. According to the invention, the inner surface of the lid on a bulge, which is formed by a recessed grip in the lid, wherein the different gap dimensions are generated by the bulge of the lid.

By the invention can be advantageously achieved that large, designated as coarse dirt particles that do not fit due to their size through the region of the first ejection opening with a first gap, can be ejected in the region of the larger gap. This makes it possible to prevent clogging of the discharge openings by particularly large coarse dirt particles and also to achieve a more uniform filling of the separation chamber.

A vacuum cleaner in the context of the invention is an electrically operable floor, hand or stick vacuum cleaner. Such a vacuum cleaner usually comprises a motor with a suitable fan for the intake of air and / or liquids. It can be a dry and / or wet vacuum cleaner accordingly. It can be a domestic or industrial vacuum cleaner. In particular, the invention may be intended for use in a bagless vacuum cleaner. By means of the vacuum cleaner, a user is able to generally free a room and in particular furniture, curtains or floor coverings of soiling, in particular dusts and hairs.

An inventive vacuum cleaner uses a centrifugal separator. In a centrifugal separator, a suction air flow is set in rotation and, due to the resulting centrifugal force, solid and / or liquid dirt particles entrained in the suction air flow are at least partially separated from the suction air flow. A swirl tube separator according to the invention is a special form of centrifugal separator, in which the particles are deposited tangentially in the direction of the centrifugal force via at least one ejection opening and pass into a flow-calmed dust collecting space.

A swirl tube separator according to the invention comprises a separating chamber, which essentially has the shape of a hollow cylinder, and which can have a conically tapering shape at least in sections. A cylinder is described by a lateral surface, a top surface and a base surface and has a central cylinder axis. The base area is referred to below as ground. The lateral surface of the hollow cylinder, hereinafter referred to as the inner wall, delimits the separation space circumferentially and has ejection openings whose size is described by a gap. The gap is the size of the opening measured in a direction parallel to the cylinder axis. An ejection opening may be substantially rectangular, rounded or even circular. The width of an ejection opening which is measured perpendicular to the gap is at least as large as the gap of the discharge opening. For example, the gap dimension of a circular ejection opening is the diameter. Ejection openings are usually arranged in the immediate vicinity of the top surface.

In addition, a swirl tube separator according to the invention comprises a dust collecting space, which is connected to the separating chamber via the ejection openings. Dirt particles pass from the separator into the dust collection chamber through an ejection opening.

According to the invention, the separation chamber has one or more ejection openings with at least two regions of different sized gap dimensions, a first gap dimension and a further gap dimension that is greater than the first gap dimension. The at least two areas may be located in the same or in different ejection openings. The areas with different sized gaps, to allow a preferred ejection of dirt particles of different grain size in different, possibly separate areas of the dust collection space. The area with the larger gap size serves as an ejection window for coarse dirt and the area with the smaller gap dimension as an ejection window for fine dirt. An ejection of fine dirt by the ejection window for coarse dirt is not excluded but is more likely to be done by ejection window for fine dirt. Coarse dirt refers to those dirt particles which, due to their size, do not fit through the ejection window for fine dirt. Fine dirt, on the other hand, is understood to mean all those particles whose grain size is smaller than the first gap size. In particular, fine dirt particles have a smaller grain size than coarse dirt particles, wherein the grain size can generally be measured by sieving.

The solution of the problem is also achieved by providing a vacuum cleaner which comprises an aforementioned Wirbelrohrabscheider.

Preferred embodiments of the invention

Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.

A preferred vortex tube separator further comprises at least one air inlet, which is usually arranged close to the floor, and preferably at least one air outlet. Typically, an air outlet is formed as a cylindrical dip tube coaxial with the Penetration room protrudes and pierces the ground. The height of the dip tube, measured from the bottom to the opening of the dip tube, is usually smaller than the height of the inner wall, measured from the bottom to the next ejection opening. A preferred vacuum cleaner comprises a motor-blower unit which is arranged in the housing of the vacuum cleaner. The motor-blower unit generates a suction air flow. Through the air inlet of the separating space of the contaminated with dirt particles suction air flow is supplied. The suction air flow can be supplied to the separation chamber, for example in the tangential direction, which favors the formation of the air vortex. The suction air stream rotates along the inner wall, describing a helical path. Due to the resulting centrifugal force, the dirt particles are accelerated radially outward toward the inner wall. Upon reaching an ejection opening, the dirt particles are deposited tangentially into the dust collection chamber. The largely freed from dirt Saufluftstrom is deflected in the area of the lid surface and discharged through the air outlet. The deflection is usually harsh, whereby the deposition of dirt particles can be done very effectively.

It is preferred that the first ejection opening is formed as a single contiguous ejection gap surrounding the separation chamber. Through the ejection gap an ejection edge is formed. A preferred ejection edge lies in a plane. A preferred plane is perpendicular to the cylinder axis of the separation chamber. A flat ejection edge has the advantage that the dust container can be filled up to the full height of the inner wall, without dirt getting back into the separation chamber. In an embodiment with a flat separating edge, the different gap dimensions are formed by the surface lying opposite the separating edge. In an alternative embodiment, in particular a part of the ejection edge can not lie in a plane, so that the different large gap dimensions are formed for example by a recess, wherein the recess can serve as ejection window for coarse dirt.

Preferably, the first gap dimension and the further gap dimension are arranged on opposite sides of the separation space. Particularly preferably in opposite areas of a single ejection gap which extends over the entire circumference of the separation chamber. The term "opposite" refers to the cylinder axis of the separation chamber. In an alternative embodiment, two separate mutually opposite ejection openings each have a minimum and a maximum gap. Thus, depending advantageously, one ejection window each for coarse dirt and fine dirt can be arranged in connection with one area of a dust collecting space for coarse dirt and fine dirt.

It is preferred that the ejection gap is formed between a top surface which closes the vortex tube separator and an ejection edge. A preferred deck surface is disposed at an upper end of the swirl tube separator. A preferred ejection edge lies in a plane which is preferably perpendicular to the axis of the cylinder forming the separation chamber. The Wirbelrohrabscheider is completed on one side by the top surface substantially airtight. The top surface is spaced from the ejector edge, thereby forming the ejection gap. The top surface is preferably shaped such that the gap dimension of the ejection gap has at least a maximum and a minimum. This should advantageously at least one ejection window for coarse dirt and fine dirt are formed.

It is preferred that the top surface is an inner surface of a cap closing the vortex tube separator. The lid is preferably releasably attached to the vortex tube separator and closes the vortex tube separator substantially airtight. Preferably, the lid is disposed at an upper end of the swirl tube separator. The inner surface of the lid may preferably serve as a rebound surface, which deflects dirt particles into a dust container. In particular, dirt particles having a velocity component in the direction of the lid are deflected upon impact with the inner surface of the lid in the dust container.

Preferably, the inner surface of the lid has a bulge. A preferred bulge divides a preferred ejection gap into at least two regions. The areas have different sized gaps between the inside of the lid and the ejector edge. The ejection gap preferably has at least two different gap dimensions: a maximum gap dimension and a minimum gap dimension. Particularly preferably, the different gap dimensions are generated by the shape of the lid. Again, particularly preferably, the two gap dimensions are constant within a region over a large part of the relevant region of the ejection gap. In particular, between two areas there may be a transition area in which a monotone change occurs from the minimum to the maximum gap size. Alternatively, the change in the gap dimension abruptly, for example, when the bulge is formed as a step. In particular, the change in distance is achieved by a trough-shaped bulge of the lid.

It is preferred that the bulge of the lid is formed by a recessed grip in the lid. A preferred lid includes a handle that is accessible from the outside. A recessed grip is a recess formed under the handle and a user make it easier to insert his hand and grasp the handle. The recess of the recessed grip on the outside of the lid thus generates the bulge on the inside of the lid. The handle can be used to transport the Wirbelrohrabscheiders. The handle can also be combined with a handle, by the actuation of the Wirbelrohrabscheider can be unlocked from the vacuum cleaner housing. Thus, the unlocking, removal and carrying the Wirbelrohrabscheiders can be done very easily by grasping and pressing a single handle. Another achievable advantage of the bulge on the lid is that this allows to realize a ejection window for coarse dirt, without making a recess in the ejection edge. As a result, the dust container can be filled to the full height of the inner wall, without dirt falling back into the separation chamber.

A preferred vortex tube separator has an apex cone disposed on the top surface, which is arranged and configured to direct a suction air flow from an outer to an inner region of the separation chamber. An apex cone can advantageously support the separation of dirt particles. A preferred apex cone is releasably attached to the top surface. The achievable advantage here is that the user has another operating mode without Apexkegel available.

A preferred vortex tube separator comprises a dust collection chamber surrounding the separation chamber. A preferred dust collecting space is formed by the gap between an outer wall surrounding the inner wall and the inner wall. Preferably, a floor connects the outer wall and the inner wall at a lower end of the two walls and thereby limits the dust collecting space down. The distance between the inner wall and the outer wall may have a shape that differs significantly from the cylindrical shape, which is usually adapted to the shape of the recess in the vacuum cleaner housing, in which the Wirbelrohrabscheider is used. As a result, the capacity of the dust collection chamber can be optimized. Due to the different shape of inner wall and outer wall, the distance between inner wall and outer wall along the circumference and along the height of the inner wall is generally not uniform.

It is preferred that a large part of a volume of the dust collection chamber surrounds the separation chamber in the region of the ejection opening with the larger gap. Particularly preferably, the volume fraction in this area is more than 70%. In this way, an advantageous division of the dust collecting space can be achieved in areas for coarse and fine dirt. Coarse dirt particles by the larger Ejection hole ejected, claim a larger volume than fine dirt particles. A uniform filling of the dust collection chamber can therefore be advantageously favored by differently sized filling areas. Accordingly, it is preferable that a smaller proportion of the volume of the dust collecting space surrounds the separating space in the region of the ejection opening with a smaller gap. Particularly preferably, the volume fraction here is less than 30% of the total volume.

Preferably, the maximum clearance range extends over an angular range of 90 to 270 degrees (based on a 360 degree full circle) along the circumference of the separation space. Particularly preferably, the range with the maximum gap dimension extends over an angular range of 180 Gad. The angular range is measured in a plane perpendicular to the axis of the separation space and is a measure of a proportion of the circumference of the inner wall.

It is preferable that the larger gap size is at least 28 mm. Particularly preferably, the larger gap is a maximum gap and is at least 30 mm, more preferably at least 35 mm. The ejection opening with maximum gap size preferably serves as ejection window for coarse dirt. The larger the gap dimension of this ejection opening, the larger dirt particles can be deposited unhindered into a dust collecting space behind it. A particularly large gap size can have the advantage that particularly large particles of dirt can be ejected. A preferred ejection window for coarse dirt is suitable for ejecting dirt particles having a grain size of at least 10 mm, more preferably at least 20 mm, even more preferably at least 25 mm. In this way, the advantage can be achieved that larger objects sucked in, for example coins or bottle caps, which could otherwise clog an ejection opening, are ejected through the coarse dirt window into the dust collecting space.

It is preferable that the first gap is at most 20 mm. Particularly preferably, the first gap is a minimum gap and is at most 15 mm, more preferably still at most 10 mm. As a result, an ejection window for fine dirt can be realized, which allows an advantageous sorting in fine dirt and coarse dirt. Through the discharge opening with a minimum gap size larger dirt particles can not be ejected. In this way, it can be achieved that dirt particles are sorted by size and distributed in volume regions of the dust collection chamber adapted to the size of the dirt particles. In a preferred embodiment a particularly small minimum clearance can be achieved by a preferred bulge is formed particularly deep in a preferred lid, whereby a particularly ergonomic recessed grip can be realized in the lid. Preferably, the ejection window is arranged with minimal clearance very close to the top surface. As a result, the effect of the inside of the top surface as a rebound surface for fine dirt can be improved. Furthermore, advantageously a preferred ejection of fine dirt through the ejection opening can be achieved with minimal gap, since a bounce surface arranged closer to the ejection edge can increase the likelihood that fine dirt particles are deflected by impact against the rebound surface into a dust container located behind the ejection opening.

Brief description of the drawings

Further advantageous embodiments will be described in more detail below with reference to an embodiment shown in the drawings, to which the invention is not limited.

Figur 1:

Fig. 1 zeigt eine perspektivische Schnittansicht eines erfindungsgemässen Wirbelrohrabscheiders.

Figur 2:

Fig. 2 zeigt eine Detail-Schnittansicht eines erfindungsgemässen Wirbelrohrabscheiders.

It shows schematically:

FIG. 1:

Fig. 1 shows a perspective sectional view of an inventive Wirbelrohrabscheiders.

FIG. 2:

Fig. 2 shows a detail sectional view of an inventive Wirbelrohrabscheiders.

Detailed description of the invention with reference to an embodiment

In the following description of a preferred embodiment of the present invention, like reference characters designate like or similar components.

Fig. 1 shows an embodiment of a Wirbelrohrabscheiders 1 in a perspective view, which is partially shown in section. A cylindrical separating chamber 2 is arranged centrally in a dust collecting space 3 and opened upwards. The lateral surface of the cylindrical separating chamber 2 forms an inner wall 8. The upper edge of the inner wall 8 forms an ejection edge 9. A distance from the inner wall 8 Outer wall 7 surrounds the inner wall 8, wherein the intermediate space forms a dust collecting space 3. The vortex tube separator 1 is substantially hermetically sealed by a detachable lid 4 which is fixed to an upper end of the outer wall 7. A bottom 5 connects the outer wall 7 with the inner wall 8 and closes the Wirbelrohrabscheider 1 downwards. The outer wall 7 of the dust collection chamber 3, the inner wall 8 of the separation chamber 2 and the bottom 5 are made in one piece by injection molding of plastic, whereby the Wirbelrohrabscheider 1 can be produced in a particularly cost in large quantities. A one-piece design also avoids the occurrence of gaps or cracks in which dirt can settle. Through an air inlet 6, which pierces the outer wall 7, the separation chamber 2 is supplied tangentially with a dirt-laden suction air flow. The inflow direction is indicated by an arrow. In the separation chamber 2, an air vortex is generated, which is indicated by a curved arrow. Due to the resulting centrifugal force, dirt particles are accelerated outwards towards the inner wall 8. In addition, the air vortex flows helically upwards in the direction of the cover 4 and conveys dirt in the direction of the ejection edge 9. Upon reaching the ejection edge 9, the dirt particles are deposited in the flow-calmed dust collecting space 3. Due to the distance between an inner surface 10 of the lid 4 to the ejection edge 9, an ejection gap with two areas of different sized gaps is formed, as in detail in Fig. 2 is shown. A maximum gap h2 is 28 mm wide, a minimum gap h1 is 20 mm wide. Due to the different width gaps to be achieved that coarse dirt and fine dirt is deposited in preferably in different areas. Coarse dirt is preferably deposited on the discharge gap with maximum gap h2. The volume fraction of the dust collecting space 3 surrounding the range of the maximum gap h2 is about 70% of the total volume of the dust collecting space 3. Thus, a larger volume fraction is provided for collecting coarse dirt. Since coarse dirt particles are more voluminous than fine dirt particles, it can thereby be achieved that emptying of the dust collection space must be less frequent. Fine dirt is preferably deposited in the area with the minimum gap h1. The volume fraction of the dust collecting space 3, which surrounds the area of the minimum gap h1 is about 30% of the total volume of the dust collecting space 3. The smaller fine dirt particles take up less space. Thus, should be achieved by the division of coarse dirt and fine dirt the advantage that the dust collection chamber 3 is used more efficiently. The preferred separation of fine dirt on the smaller ejection gap can be achieved by the action of the inner surface 10 of the lid 4 as a rebound surface. Since the inner surface 10 is located closer to the ejection edge in this area, increases the likelihood that fine dirt collides with the inner surface 10 and in the Dust container 3 is deflected. The different sized volumes in the dust collection chamber 3 are generated by correspondingly different distances between the inner wall 8 and outer wall 7. This also allows an adaptation of the shape of the Wirbelrohrabscheiders provided for this recess in the vacuum cleaner.

The different sized gap dimensions are realized by a bulge 11 on the inner surface 10 of the lid 4. This bulge 11 makes it possible to form a recessed grip 12 in the cover 4, which simplifies the engagement of a handle 13. The handle 13 allows the user to remove the Wirbelrohrabscheider 1 from a vacuum cleaner housing, not shown. By pressing the handle 13, a locking device with which the Wirbelrohrabscheider 1 can be fixed in the vacuum cleaner housing solved. The handle 13 also serves to transport the Wirbelrohrabscheiders 1. The lid 4 is detachably attached and can be opened to empty the dust collection chamber 3. The areas of the ejection gap with minimum gap h1 and maximum gap h2 each extend over an angular range of about 180 degrees along the ejection edge 9. This can provide the advantage that the dust collection chamber is designed to collect fine dirt and coarse dirt.

The vortex tube separator 1 is inserted in a vacuum cleaner housing in such a way that the cylindrical separation chamber 2 is as vertical as possible, the bottom 5 being oriented downwards and the cover 4 oriented upwards. As a result, an overflow of collected dirt back into the separation chamber 2 can be prevented.

The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in any combination for the realization of the invention in its various forms.

LIST OF REFERENCE NUMBERS

1

Vortex Tube

2

separating chamber

3

Dust collection chamber

4

cover

5

ground

6

air intake

7

outer wall

8th

inner wall

9

ejection edge

10

Inner surface of the lid

11

bulge

12

grip

13

Handle

h1

minimal gap

h2

maximum gap

Claims (9)

1. Eddy tube separator (1) for a vacuum cleaner, wherein the eddy tube separator (1) comprises a separating chamber (2) and a dust collecting chamber (3), which are connected to one another by means of a first ejection opening,
   wherein the first ejection opening is embodied as an ejection gap circumferentially linking the separating chamber (2) between an ejection edge (9) and a cover area (10), wherein the cover area (10) is an inner area of a cover (4) closing the eddy tube separator (1), wherein the ejection gap has a region with a first clearance (h1) and a region with a further clearance (h2) which is larger than the first clearance (h1),
   wherein the inner area of the cover (4) has a bulge (11), wherein the different clearances are generated by the bulge of the cover (4),
   characterised in that the bulge (11) is formed by a recessed grip (12) in the cover (4).
2. Eddy tube separator (1) according to claim 1, characterised in that the first clearance (h1) and the further clearance (h2) are arranged on opposing sides of the separating chamber (2).
3. Eddy tube separator (1) according to claim 1 or claim 2, characterised in that an apex cone is arranged and embodied on the cover area (10) such that it directs a flow of suction air from an outer into an inner region of the separating chamber (2).
4. Eddy tube separator (1) according to one of the preceding claims, characterised in that the eddy tube separator (1) comprises a dust collecting chamber (3), which surrounds the separating chamber (2).
5. Eddy tube separator (1) according to claim 4, characterised in that a large part of a volume of the dust collecting chamber (3) surrounds the separating chamber (2) in the region of the ejection gap with the larger clearance (h2).
6. Eddy tube separator (1) according to one of the preceding claims, characterised in that the region with the larger clearance (h2) extends beyond an angular range of 90 to 270 degrees along the periphery of the separating chamber (2).
7. Eddy tube separator (1) according to one of the preceding claims, characterised in that the larger clearance (h2) amounts to at least 28 mm.
8. Eddy tube separator (1) according to one of the preceding claims, characterised in that the first clearance (h1) amounts to at most 20 mm.
9. Vacuum cleaner, characterised in that the vacuum cleaner comprises an eddy tube separator (1) according to one of the preceding claims.

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