EP2679132B1 - Vacuum cleaner with dust filter - Google Patents

Description

Field of the invention

The invention relates to a vacuum cleaner comprising at least one Lufteinströmöffnung and at least one Luftausströmöffnung, and having between a Lufteinströmöffnung and a Luftausströmöffnung a dust filter can flow through the air from the Lufteinströmöffnung to Luftausströmöffnung and which is attached to a first frame structure.

Background of the invention

The DE 101 642 79 A1 shows and describes a grid arrangement of a vortex-dust collecting device for a vacuum cleaner. The grid assembly comprises a grid body, a sealing member and a filter device. The filter device has a filter support part and a filter carried by the filter support part. The filter support member is integrally formed with the seal member and the filter is attached to the filter support member. A similar grid arrangement is also known from US 2004/0163207 A1 known.

The publication DE 1951306 A teaches an electric vacuum cleaner. The vacuum cleaner has a dust removal unit. The dust removal unit consists of a main filter, from a substantially cylindrical housing accommodating the main filter, from a prefilter clamped by a frame pivotally mounted at a front end of the housing, to a perforated end plate in the vicinity a rear end of the housing is mounted, and a slider which is slidably mounted on the perforated end plate. The housing and the perforated end plate are releasably inserted in annular grooves of a sealing frame made of elastic material, which holds the main filter along its circumference, whereby the prefilter, the main filter and the slider are assembled to the dust removal unit.

The JP 2005-237469 A teaches a filter for a vacuum cleaner. The filter has a flexible frame that can be deformed. By bending the filter so that recesses are widened in the filter surface, dust can be released in a simplified manner. The flexible frame of the filter is supported on another frame.

From the US 2008/0010958 A1 a filter device for vacuum cleaners is known. A filter construction of the filter device comprises a filter support having a rectangular shape. A filter element is adapted to be mounted in the filter carrier. The filter carrier can be used in a vacuum cleaner side filter receiver.

The US 2003/0208878 A1 teaches a removable dust removal unit for a vacuum cleaner. It has a filter construction. To assemble the filter construction, an aperture is first attached to a filter element. Both are then attached to a wall bracket.

The German patent application DE 103 16 668 A1 discloses a dust receptacle for a vacuum cleaner detachably mounted in a suction chamber of a nipple body to filter out dust from the dust-laden air sucked into the suction chamber through an air suction port connected to the outside. The dust receptacle includes a dust receptacle housing including a communication port connected to the air intake port and an outflow section for discharging the intake air, and a dust filter assembly having at least three dust filters removably mounted in the outflow section. The dust filter assembly comprises a first, a second and a third dust filter, which are porous type and arranged sequentially, wherein the pores of the second dust filter are smaller than those of the first dust filter and the pores of the third dust filter are smaller than those of the second dust filter and wherein dust-laden, sucked through the connection opening air flows in order through the first, the second and the third dust filter. The US patent application US 2007/0209340 A1 discloses a vacuum cleaner with a vortex separator. The Staubabscheideeinheit the vortex separator comprises an air inlet, which is arranged at the top of the separation unit. A dust-laden fluid passes over the air inlet via the dust collection unit and is passed over a spiral ramp. The Staubabscheideeinheit comprises in its interior a dust filter of a fine network. The dust filter may include an inner dust filter and an outer circumferential filter having a shell surface which may be disposed parallel to the air outlet of the dust collecting unit.

From the US patent application US 2006/0 053 757 A1 For example, a swirling separator with a dust collecting device and a vacuum cleaner with such a device are known. The dust collecting device comprises a cylindrical body with a grid. A helically shaped flange is integrally formed on the lower outer circumference of the cylindrical body. The flange directs heavy debris or debris down the spiral of the flange to accommodate heavy debris or debris in a dust collection chamber. A second guide member is disposed on the inner circumference of the cylindrical shell of the Staubabscheideeinheit. The air, which has been freed of heavy dirt or debris by centrifugal force, is filtered by passing through perforations on the cylindrical body of the grate.

The British patent application GB 2 483 885 A describes a vacuum cleaner. The vacuum cleaner apparatus includes a filter housing having at least one air inlet for receiving an airflow, a filter assembly removably disposed in the filter housing for removing debris from the airflow, and a channel for receiving the airflow discharged from the filter assembly. The filter assembly includes a filter body having a filter frame. In addition, the filter assembly includes a filter attached to the filter body, which filter may include a plurality of layers of filter material. In addition, the filter assembly includes a biased coupling member that is movable relative to the filter body to engage the channel. The coupling element has an air outlet through which the air flow is discharged from the filter assembly.

The US patent application US 2004/0 098 826 A1 describes a dust collector filter for a vacuum cleaner that can be reused after it has been emptied and washed. The dust collection filter includes a filter housing having a back surface and a side surface extending vertically from an edge of the back surface to thereby define a predetermined space. The back surface has an air outlet hole formed therein in fluid communication with the air outlet, a cover having an air inlet hole in fluid communication with the air inlet and detachably connected to the filter housing, and a dust filter means mounted in the filter housing for filtering dust the air sucked in through the air inflow hole and discharged through the air outlet hole. The dust filter means comprises a frame and a network body arranged on the frame. Accordingly, since the dust collecting filter can be reused after being emptied and washed, it is not necessary to replace the dust collecting filter.

The problem underlying the invention

The invention has for its object to provide a vacuum cleaner, which is improved over the prior art.

Inventive solution

The reference numbers in all claims have no limiting effect, but are only intended to improve their readability. The object underlying the invention is achieved by a vacuum cleaner according to claim 1.

A vacuum cleaner according to the invention is an electrically operable canister vacuum cleaner, stick vacuum cleaner, table vacuum cleaner or an upright vacuum cleaner. Such a vacuum cleaner usually comprises a motor with a suitable fan for sucking air or liquid. It can be a dry and / or wet vacuum cleaner accordingly. 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 air inflow opening according to the invention is an opening in a vacuum cleaner, is sucked through the dust-laden air or liquid in a region of the vacuum cleaner. For example, it is the opening through which suction via external suction means of the vacuum cleaner, such as a suction hose, suction air is sucked into the vacuum cleaner housing. Also, an opening in spaces within the vacuum cleaner, is sucked through the suction air in these rooms, is an air inlet opening in the context of the invention. The dust is thus supplied via the air inlet opening to the vacuum cleaner or rooms in the vacuum cleaner.

An air outlet opening in the sense of the invention is an opening in a vacuum cleaner through which air or liquid cleaned by dusts emerges. In this case, such an opening is a Luftausströmöffnung, which is still within the vacuum cleaner housing and emits in another part of the vacuum cleaner housing purified air or liquid, as well as an opening which is located directly on the outer surface of the housing and purified air from the housing interior the environment gives off. Purified air or liquid in the sense of the invention is that air or liquid which, due to the treatment in the vacuum cleaner, has less dirt than before the treatment in the vacuum cleaner. It does not have to be completely dust-free.

A dust filter according to the invention is a barrier between a region of the vacuum cleaner with dust-laden air or liquid and a region of the vacuum cleaner with less dust-laden air or liquid, which can be penetrated by suction and / or sucked liquid. The barrier may have openings of different sizes, depending on the size of the dust particles that are to be held up by this dust filter.

A frame structure according to the invention is an element that gives the dust filter increased stability. For this purpose, the dust filter is attached to the frame structure.

The term supports means in the sense of the invention that the second frame structure counteracts a deformation of the first frame structure by forces acting on the first frame structure. For example, such a force is the force that is exerted by the suction air flow when flowing through the dust filter on this and with sufficient force effect could deform the dust filter carrying the first frame structure or solve their position. It is expedient, but not mandatory, to arrange the second frame structure relative to the first frame structure such that it unfolds its supporting effect exactly opposite to the force acting on the first frame structure.

By the vacuum cleaner according to the invention, the advantage can be achieved that a dust filter, which is attached to a first frame structure, which has a circular cylindrical shape, improved against the vacuum acting in the vacuum cleaner may be supported. The first frame structure is elastically deformable with less force compared to the second frame structure. In particular, this may be the case when a light or elastic material is used for the first frame structure for holding the dust filter. Such a material may be advantageous because it allows the frame structure with the filter to be better cleaned, for example by tapping, washing or wringing. By the second frame structure can be prevented that the dust filter is released with the first frame structure by the negative pressure from its position and self-sucked, or that it dissolves at its edges from the vacuum cleaner and thus arise areas that are no longer covered by the dust filter so that suction air can penetrate unfiltered from the dust-contaminated area of the vacuum cleaner in the less dust-polluted area of the vacuum cleaner. The vacuum cleaner according to the invention thus allows a vacuum cleaner to be provided with an improved cleaning action, in particular when the first frame structure is made of a relatively soft material of low rigidity. In addition, the ease of use can be improved because less maintenance on the vacuum cleaner must be carried out and the dust filter can be cleaned more easily.

Preferred embodiment 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.

It is preferred that the vacuum cleaner is a vacuum cleaner with Wirbelabscheidetechnologie. Vortex separation technology means that the vacuum cleaner's operating principle is based on the separation of dust from the suction air due to centrifugal force in a suction air duct. Such a vacuum cleaner can provide a particularly good suction performance and in such a vacuum cleaner can act on the dust filter due to the technology used special forces, so this can benefit greatly by its first frame structure is supported by a second frame structure in the vacuum cleaner. Preferably, such a vacuum cleaner with Wirbelabscheidetechnologie is a vacuum cleaner with Vorbelsenkabscheider. In a vortex precipitator, there is typically a separator lip which retains dust in a fixed area of the vortex trap, namely in a dust collection chamber. Such a rib can be designed as a projection. However, the dust collecting chamber can also be arranged separately from the vortex scraper and connected to an opening with this. Alternatively, however, the vacuum cleaner can also be one with Wirbelrohrabscheider or Zyklonabscheider. However, a conventional vacuum bag vacuum cleaner may also have a dust filter attached to the first frame structure supported by a second frame structure.

In a preferred embodiment, a Staubabscheideeinheit the vacuum cleaner on the second frame structure. A dust collecting unit in a vacuum cleaner is the part of the vacuum cleaner in which dust is separated from the air. Preferably, this may be arranged in a vacuum cleaner with Wirbelabscheidetechnologie. Such a dust collecting unit may include a housing, an air inflow port, a grate structure having a dust filter function, an air outflow port and a dust collection chamber, or a connection to an external dust collection chamber without being limited to these features. It can be permanently or detachably connected to the vacuum cleaner. Typically, in a dust collecting unit according to the invention, dirt from suction air flowing in via the air inflow opening or the plurality of air inflow openings is extracted from the suction air by centrifugal force away, along the housing wall of Staubabscheideeinheit down into a dust collection space, which may be formed in the Staubabscheideeinheit itself or outside, forwarded and discharged the purified suction air from the Luftausströmöffnung. In this case, the suction air flows through the dust filter before exiting, which can remove not yet separated dust residues from the suction air, so that they remain in the Staubabscheideeinheit. Preferably, the dust collecting unit has the second frame structure for supporting the first frame structure on an outside of the dust collecting unit. It is particularly preferred, however, that the second frame structure is disposed within the Staubabscheideeinheit. Thus, a dust filter can be used which has a much larger surface than would be possible if the vacuum cleaner dust filter, for example, located directly above the Lufteinströmöffnung on the outside of Staubabscheideeinheit, since this opening usually has only a small diameter. Dealing with the Staubabscheideeinheit and their openings alone, z. As to clean the dust filter, it may be easier for the user than having to open the whole vacuum cleaner. Thus, the user-friendliness of a vacuum cleaner can be improved when the second frame structure supporting the dust filter is disposed in the dust collecting unit of the vacuum cleaner.

It is preferred that the first frame structure and the second frame structure are releasably connected to each other. As a result, the advantage can be achieved that the first frame structure together with the dust filter can be removed from the vacuum cleaner in a particularly simple manner. A dirty dust filter can thus be cleaned more easily or easily replaced if heavily soiled. Preferably, the first frame structure and the second frame structure are arranged displaceable against each other. Particularly preferably, they are positively connected. Alternatively, you can also be screwed. It is particularly preferred that the first frame structure is detachable from the second frame structure through an opening in the vacuum cleaner and then removable and reusable through the same opening. Preferably, this opening is located in the Staubabscheideeinheit the vacuum cleaner. This is particularly preferably a Staubabscheideeinheit a Vorbelsenkabscheiders. Again, particularly preferably, this opening is the air outlet opening of the vortex sinker.

It is preferable that the first frame structure is a lattice structure. A grid structure can particularly advantageously support a dust filter. Thus, it may have improved stability, although the dust filter per se is formed of, for example, a thin fleece or a similar thin material of low rigidity. Such a grid structure may, for example, extend over the entire surface of the dust filter and support the dust filter particularly well in this particularly preferred manner of construction. Preferably, the grid structure is arranged only on one side of the dust filter. Alternatively, it is also possible to arrange a lattice structure on both sides of a dust filter and to keep it clamped, for example, between the two lattice structures. For example, a clamping holder of two grid structure elements, which are connected to each other via a hinge and between which the dust filter can be inserted, particularly preferred. However, the dust filter on the grid structure can also be connected in a material-locking manner, for example glued on. Thus, a particularly user-friendly grid structure with a dust filter can be provided in which the dust filter can not accidentally come off the grid structure. But the dust filter can also be carried out separable from the grid structure and be releasably connectable to this by pockets or similar projections on the grid structure.

It is preferred that the first frame structure has at least two dust filters. This can have the advantage that dusts of different sizes can be removed from several dust filters on the frame structure. For example, a dust filter with a dust filter property on the front side of the first frame structure and a dust filter with another dust filter property on the back side of the first frame structure may be arranged. Also, the two dust filters can be arranged one above the other, so resting on each other, only on one side of the frame structure. But it can also be used several same dust filter. The dust filter itself can be formed, for example, from fleece, foam or a coarse grid. This can be dependent on which types of dust are to be filtered by the respective dust filter. It is particularly preferred that the first frame structure has on one side a fleece for filtering fine dusts and on another side a coarser dust filter for filtering relatively coarse dust. One of the dust filters is preferably designed as a foam.

Furthermore, it is preferable that the second frame structure is a lattice structure. Through a grid structure suction air can penetrate particularly well, so that the suction power of the vacuum cleaner can be little affected by a second frame structure. If both the first frame structure and the second frame structure are a lattice structure, this can have a particularly advantageous effect on the supporting effect of the two frame structures without substantially impairing suction air flow through the vacuum cleaner.

It is particularly preferred that the first frame structure has a smaller torsional rigidity compared to the second frame structure. This may have the advantage that the first frame structure carrying the dust filter, for example, by the user can be elastically twisted or otherwise deformed, whereby a particularly simple removal of dust from the dust filter can be achieved, for example by tapping. It is particularly preferred that the torsional stiffness of the first frame structure is so small that the user can wring out the dust filter. Both dust filters and the first frame structure attached thereto are preferably washable. Then, namely, the dust filter can be particularly preferably removed from the vacuum cleaner together with the first frame structure and washed, for example in a washing machine or a hand basin and then wrung out by the user. A suitable suitable material for the first frame structure may be, for example, a relatively soft rubber compound, rubber or a flexible polymer. Accordingly, as a material for the second frame structure, a comparatively harder plastic, a comparatively hard polymer material, a flexurally strong metal construction or a similar solid structure are suitable. If the second frame structure is made of a rigid material and the first frame structure is made of a relatively comparatively flexible material, the relative support effect of the second frame structure with respect to the first frame structure with the dust filter can be particularly pronounced.

It is preferable to find a cylindrical design of the first frame structure in vortex separators. A cylindrical frame structure is preferably arranged coaxially with the dust separation unit of the vortex separator, more preferably its lateral surface extends parallel to the wall of the dust separation unit. Particularly preferably, it is arranged concentrically in the Staubabscheideeinheit. Having a first frame structure with a cylindrical shape in a Staubabscheideeinheit a Vacuum cleaner with vortex separation technology, so on the outer surface of the first frame structure, a particularly large-area dust filter can be provided, which covers a large area on the first frame structure. Thus, the cleaning effect of the vacuum cleaner can be improved. The dust filter may surround the jacket of the first frame structure in a tubular manner, but also be placed on one or both ends of the first frame structure in a hat-like manner, ie be concentric over the first frame structure as a cylinder open to one side and cover one end of the first frame structure with a closure surface , Instead of a circular cylindrical shape is for the first frame structure and a cylindrical shape in question, in which the frame structure in cross-section angular, for example, three, four, five, six, seven, eight, nine or ten toe is executed. The cylindrical shape of the frame structure can also be designed so that it has in cross section so many corners, that in turn describes a nearly circular cylinder. In the case of a cylindrical first frame structure, the dust filter may be disposed on the inside, the outside or on both surfaces of the cylindrical frame. It may be integrally connected to the cylindrical frame or be detachable from this. In this case, it is preferable that the dust filter is connected to the frame structure via pockets or similar brackets. Then, the dust filter can be easily detached from the frame structure by the user to clean or replace the dust filter. However, it is preferred that the dust filter is arranged cohesively on a cylindrical frame structure, for example with a water-insoluble adhesive. If the first frame structure then has a comparatively small torsional stiffness, then the cylindrical frame structure with the filter arranged thereon can be wrung out particularly well by the user after it has been cleaned, for example, in a washing machine or in the washbasin.

It is preferred that the second frame structure has a cylindrical shape. Preferably, this is circular cylindrical, more preferably it has the same cross-sectional shape of the cylinder as the first frame structure. Preferably, it is arranged within the first frame structure, more preferably coaxially to it, particularly preferably concentric with the first frame structure, even more preferably in a vortex separator, again particularly preferably concentric with the vortex separator, which is particularly preferably a Staubabscheideeinheit. Alternatively, however, the second frame structure may be the first frame structure supporting the dust filter. surrounded and supported from the outside. Preferably, the second frame structure of the vacuum cleaner is releasable. Particularly preferably, it is detachable from the Staubabscheideeinheit the vacuum cleaner. Again particularly preferably, the second frame structure is further arranged axially displaceable relative to the vortex separator. As a result, it can be removed in a simplified manner together with the first frame structure and the dust filter arranged thereon from the vortex separator. If the first frame structure and the second frame structure are cylindrically shaped, the advantage can be achieved that a particularly large dust filter surface can be provided in a vacuum cleaner and preferably in a vortex separator, and the available surface can be utilized in an improved manner.

In a preferred embodiment, in the operating state of the vacuum cleaner, the first and the second frame structure are arranged concentrically in a third frame structure. It is preferred that the third frame structure is integrally connected to the vacuum cleaner. It is particularly preferred that it is integrally connected to the Staubabscheideeinheit the vacuum cleaner. The third frame structure can thus form a bearing for the first and the second frame structure, so that a secure hold in the vacuum cleaner is made possible for the first and the second frame structure. It is furthermore preferred that a seal is arranged between the third and the second frame structure. This can prevent dirt-laden suction air from flowing between these two elements instead of flowing through the dust filter on the first frame structure.

It is preferred that the first frame structure is separable from the vacuum cleaner together with the second frame structure. Preferably, both can be removed together from a Staubabscheideeinheit the vacuum cleaner and thereby separable from him. Preferably, these are removed from the vacuum cleaner coaxially to Staubabscheideeinheit. Particularly preferably, the first frame structure is separable from the vacuum cleaner together with the second frame structure, and the first frame structure can in turn be separated from the second frame structure. In addition, if the first frame structure can still be wringed out and washed, the step-wise separation of the first frame structure from the second frame structure and the vacuum cleaner makes it possible to clean the dust filter in a particularly simple and advantageous manner for the user.

It is preferred that the second frame structure for the user is non-detachably connected to the third frame structure. Preferably, it is integrally connected to the third frame structure. For example, the Staubabscheideeinheit be releasably connected to the vacuum cleaner, so that by removing the Staubabscheideeinheit from the vacuum cleaner at the same time the first frame structure is separable from the vacuum cleaner together with the second frame structure. Alternatively, the second frame structure can be removed together with the first frame structure but also from the Staubabscheideeinheit. That is, in this case, the dust-collecting unit is detachably connected to the second frame structure. The particular advantage that can be achieved is that the user may have less trouble cleaning the dust filter disposed on the first frame structure.

It is preferred that the second frame structure for the user is non-detachably connected to the third frame structure and the first frame structure for the user is detachably connected to the second frame structure. This can have the advantage that the first frame structure with the dust filter can be very well supported by the second frame structure and, for cleaning the dust filter, the first frame structure only has to be removed from the second frame structure. The second frame structure remains in a Staubabscheideeinheit the vacuum cleaner and may be useful in reinserting the first frame structure to their orientation. It is preferred that the first frame structure can be placed in a plurality of positions on the second frame structure or slipped over it. This has the advantage that the user does not have to cumbersome find a single attachment position for the first frame structure to mount over the second frame structure.

It is preferred that at least one of the second and the third frame structure has at least one dust filter. As a result, the cleaning performance of the vacuum cleaner can be greatly improved. For example, both the first and the second and the third frame structure may have a dust filter. If, for example, dust filters are arranged on the inside and outside of all three frame structures, then six different or the same dust filters can be arranged on the three frame structures. However, more or less than six dust filters may be disposed on the three frame structures. For example, the third frame structure do not carry any dust filter while the second and the first frame structure carry one, two, three or four dust filters. Also, more than six dust filters may be disposed on the three frame structures when, for example, dust filters are stacked. The dust filter of these stacks are then preferably integrally connected to each other, for example glued. Due to the large number of dust filters, different dusts can be removed from the suction air without overloading a single dust filter. For example, they may be arranged so that a coarse dust filter is the outermost dust filter, followed by a dust filter for medium sized dust, followed by a dust filter for particulate matter immediately or spaced apart. Thus, the advantage can be achieved that the air can be particularly well cleaned of existing dust in it before it is blown out through the Luftausströmöffnung back into the ambient space.

Brief description of the drawings

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

Fig. 1

einen Längsschnitt durch einen erfindungsgemäßen Staubsauger, bei dem die dritte Rahmenstruktur, die zweite Rahmenstruktur und die erste Rahmenstruktur aus einer Staubabscheideeinheit des Staubsaugers entfernbar sind;

Fig. 2

einen Längsschnitt durch eine dritte Rahmenstruktur sowie eine zweite und erste Rahmenstruktur;

Fig. 3

einen Längsschnitt durch eine zweite und eine erste Rahmenstruktur;

Fig. 4

eine Staubabscheideeinheit für einen erfindungsgemäßen Staubsauger, bei der die dritte Rahmenstruktur mit der zweiten Rahmenstruktur nicht lösbar verbunden ist und

Fig. 5

einen Längsschnitt durch eine Staubabscheideeinheit für einen erfindungsgemäßen Staubsauger und eine erste Rahmenstruktur mit einem Staubfilter.

They show schematically:

Fig. 1

a longitudinal section through a vacuum cleaner according to the invention, in which the third frame structure, the second frame structure and the first frame structure from a Staubabscheideeinheit the vacuum cleaner are removable;

Fig. 2

a longitudinal section through a third frame structure and a second and first frame structure;

Fig. 3

a longitudinal section through a second and a first frame structure;

Fig. 4

a Staubabscheideeinheit for a vacuum cleaner according to the invention, wherein the third frame structure with the second frame structure is not detachably connected, and

Fig. 5

a longitudinal section through a Staubabscheideeinheit for a vacuum cleaner according to the invention and a first frame structure with a dust filter.

Detailed description of embodiments of the invention

The FIGS. 1 to 5 show vacuum cleaner 1 according to the invention or elements which are of particular importance for such a vacuum cleaner 1.

Shown are two possible embodiments of the present invention. In the one variant, shown in the FIGS. 1 to 3 , Three frame structures 2, 3, 4 are present, which are each detachable from each other and are also releasably connected to the Staubabscheideeinheit 5 of a vacuum cleaner 1. The assembled state of these components is in FIG. 1 to see.

Fig. 1 shows a vacuum cleaner 1 with a Staubabscheideeinheit 5. In this, the Vorbelsenkabscheidetechnologie is used. Dust-laden air is drawn into the dust collecting unit 5 through a motor (not shown) via an air inflow port 6. There, it is set in helical rotation along the outer wall of the dust collecting unit 5, whereby dust is deposited downwards and outwards by the centrifugal force. This accumulates in the dust collection chamber 7 below the projection 8, which is arranged on the third frame structure 4. The now less heavily dust-laden air then flows through the third frame structure 4, which is designed as a lattice structure and shaped substantially circular cylindrical, in the direction Luftausströmöffnung 9 Staubabscheideeinheit 5. Then the suction air continues to flow through the vacuum cleaner 1 until, as previously described by Dust largely released, is released back into the environment.

A tubular dust filter 10 is according to Fig. 1 arranged on the lateral surface of the lattice-shaped first frame structure 2, which is arranged within the third frame structure 4 and concentrically coaxial therewith. The dust filter 10 is made of a porous foam and has the purpose of residual dust, not by the centrifugal force were transported into the dust collection chamber 7, to retain and absorb barrier-like before the discharge of the suction air from the Staubabscheideeinheit 5 and to let pass purified suction air. The dust filter 10 surrounds the first frame structure 2 concentrically coaxially over almost its entire length. He completely covers the openings of this first frame structure 2. The first frame structure 2 and the dust filter 10 are connected to each other by waterproof bonding. The first frame structure 2 is formed of a soft polymer material, so that it is possible to deform the first frame structure 2 by a slight force. The first frame structure 2 additionally has on its inside a thin filter fleece (not shown). It serves to filter out finer residual dust particles, which the dust filter 10 can not stop outside on the first frame structure 2.

In order to improve the rigidity of the first frame structure 2 during operation and to prevent it being deformed or displaced by the suction air, the first frame structure 2 is supported by a second frame structure 3 in the operating state. The second frame structure 3 is likewise substantially circular-cylindrical in shape and designed as a lattice structure. It is arranged within the first lattice structure 2 and is surrounded by this concentric coaxial. The second frame structure 3 also has on its inside a filter fleece (not shown). It serves to filter out the finest residual dust particles, which the dust filter 10 and the filter fleece on the first frame structure 2 can not stop.

The second frame structure 3 has a greater torsional rigidity compared to the first frame structure 2, because it is made of a solid plastic. Thus, the second frame structure 3, the first frame structure 2, which is formed in relation to its elastic, support well against the suction air. In order to optimize the supporting effect, the inner diameter of the first frame structure 2 is just slightly larger than the outer diameter of the second frame structure 3, so that the first frame structure 2 and the second frame structure 3 are axially displaceable relative to each other only with the application of a certain force, and therefore an unintentional displacement, for example, by suction or jerky movements of the vacuum cleaner 1 is much more difficult.

As in FIG. 2 can be seen, the first frame structure 2 can be removed in this embodiment, together with the second frame structure 3 from the third frame structure 4, after all three frame structures 2, 3, 4 have been taken together from the Staubabscheideeinheit 5. This happens, for example, when the dust collection chamber 7 of the dust separation unit 5 is to be emptied and to the third frame structure 4 with the projection 8 must be temporarily removed. However, it is also possible to leave the third frame structure 4 in the dust separation unit 5 and to remove only the second frame structure 3 and the first frame structure 2 from the third frame structure 4. The removal of the three frame structures 2, 3, 4 takes place coaxially to the air outlet opening 9 of the Staubabscheideeinheit. 5

As in FIG. 3 1, the first frame structure 2 can be subtracted from the second frame structure 3 supporting it. The first frame structure 2 with the dust filter 10 is such that it is washable together with it and can then be wrung out by the user. This has the advantage that the dust filter 10 can remain on the first frame structure 2 and thus obtains a certain basic rigidity, but nevertheless can be cleaned much better than a dust filter 10 on a very rigid lattice structure as a frame structure. After cleaning the dust filter 10, the filter fabric, not shown, and the residual dust filter, not shown, on the second frame structure 3, the second frame structure 3 can be used without much effort for the user again in the first frame structure 2. Then both can be connected together again with the third frame structure 4. The third frame structure 4 can then be returned to the Staubabscheideeinheit ( FIG. 1 ) are used. This means that in the same step in which the Staubabscheideeinheit 5 can be emptied, a thorough, but easy cleaning of the dust filter 10 and the other residual dust filter can be done. Thus, a particularly simple handling and yet intensive cleaning of these dust filter elements is possible.

The FIGS. 4 and 5 show another embodiment of the present invention. As in FIG. 4 can be seen, the second frame structure 3 is firmly connected to the third frame structure 4 in this case. Between the first frame structure 2 and the second frame structure 3, a seal 11 is arranged to the suction air flow through to prevent any gaps between them. For cleaning the dust filter 10 on the first frame structure 2, the user can simply peel it off the second frame structure 3 through the air discharge opening 9 of the dust separation unit 5, while the second frame structure 3 remains in the dust separation unit 5 together with the third frame structure 4. This is in FIG. 5 clarified.

This embodiment can have the advantage that the insertion of the first frame structure 2 with the dust filter 10 can be simplified because the second frame structure 3 remains in the dust collecting unit 5 and can be used for centering the first frame structure 2 with the dust filter. Thus, a likewise simplified handling of the dust filter system can be achieved. In this case too, however, it is possible to remove the third frame structure 4 with the two other frame structures 2, 3 from the dust separation unit 5, then to empty the dust separation unit 5 and to clean the dust filter 10 and further residual dust filters not shown in the same train. The dust filter 10 is also designed to be washable and wringable with the first frame structure 2, thus enabling an advantageously thorough and simple cleaning for the user.

According to the above, advantages of the invention are that the relatively soft first frame structure 2 with the dust filter 10 can be better supported against the suction air flowing through it and that the cleaning of a dust filter 10, further residual dust filters and their handling in a vacuum cleaner 1 can be improved. The dust filter 10 can be easily removed from the vacuum cleaner 1 or the Staubabscheideeinheit 5 of the vacuum cleaner 1, cleaned and then connected to the Staubabscheideeinheit 5 again. A particular advantage is the fact that can be wrung out, knocked out and possibly also washed by dispensing with a very rigid grid structure as a carrier of the dust filter 10, the dust filter 10 and the first frame structure surrounded by it. Subsequently, the first frame structure 2 together with the second frame structure 3 helps to reinstall the dust filter 10, so that this process can be simplified for the user. Thus, the reusability of the dust filter 10 is improved, whereby for the user a longer service life at the same Filter performance is enabled and the environmental impact can be reduced by reducing the amount to be disposed dust filter material.

LIST OF REFERENCE NUMBERS

1

vacuum cleaner

2

first frame structure

3

second frame structure

4

third frame structure

5

Staubabscheideeinheit

6

air inflow opening

7

Dust collection chamber

8th

projection

9

air discharge opening

10

dust filter

11

poetry

Claims (13)

1. Vacuum cleaner (1), which comprises at least one air inflow opening (6) and at least one air outflow opening (9), and which has a dust filter (10) between an air inflow opening (6) and an air outflow opening (9), through which suction air can flow from the air inflow opening (6) to the air outflow opening (9) and which is fastened to a first frame structure (2), which has a circular cylindrical shape, wherein the first frame structure (2) is supported by a second frame structure (3), characterised in that the first frame structure (2) is an element which lends the dust filter (10) increased stability, wherein the first frame structure (2) can be resiliently deformed with less exerted force compared to the second frame structure (3), so that the second frame structure counteracts a deformation of the first frame structure by forces which act on the first frame structure.
2. Vacuum cleaner (1) according to claim 1, characterised in that the vacuum cleaner (1) is a vacuum cleaner (1) with vortex separating technology.
3. Vacuum cleaner according to one of the preceding claims, characterised in that a dust separating unit (5) of the vacuum cleaner (1) has the second frame structure (3).
4. Vacuum cleaner according to one of the preceding claims, characterised in that the first frame structure (2) and the second frame structure (3) are interconnected in a releasable manner.
5. Vacuum cleaner according to one of the preceding claims, characterised in that the first frame structure (2) is a lattice structure.
6. Vacuum cleaner according to one of the preceding claims, characterised in that the first frame structure (2) has at least two dust filters (10).
7. Vacuum cleaner according to one of the preceding claims, characterised in that the second frame structure (2) is a lattice structure.
8. Vacuum cleaner (1) according to one of the preceding claims, characterised in that the second frame structure (2) has a cylindrical shape.
9. Vacuum cleaner (1) according to one of the preceding claims, characterised in that in the operating state of the vacuum cleaner (1) the first frame structure (2) and the second frame structure (3) are respectively arranged in a coaxial manner in a third frame structure (4) and concentrically thereto.
10. Vacuum cleaner (1) according to one of the preceding claims, characterised in that the first frame structure (2) can be removed from the vacuum cleaner together with the second frame structure (3).
11. Vacuum cleaner (1) according to one of the preceding claims, characterised in that the second frame structure (3) is connected to the third frame structure (4) such that it cannot be released by the user.
12. Vacuum cleaner (1) according to one of the preceding claims, characterised in that the second frame structure (3) is connected to the third frame structure (4) such that it cannot be released by the user and the first frame structure (2) is connected to the second frame structure (3) such that it can be released by the user.
13. Vacuum cleaner (1) according to one of the preceding claims, characterised in that at least one of the second frame structure (3) and the third frame structure (4) has at least one dust filter (10).

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