RU2553198C2 - Dust suction device containing vacuum cleaner and filtration bag - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: invention relates to a dust suction device containing a vacuum cleaner and a filtration bag where the filtration bag is represented by a filtration bag made of a non-woven material, a replacement filtration bag or a flat bag containing the first and the second filtration bag walls. The filtration bag has at least one surface fold, each surface fold having three areas lying within the filtration bag wall plane and areas that may project over the filtration bag wall plane so that to enable their unfolding during the vacuum cleaner operation. The vacuum cleaner has a hollow for accommodation of the filtration bag with rigid walls; provided for on the walls of the hollows for accommodation of the filtration bag is at least one first device ensuring holding at a distance (so that the device holds the areas lying within the filtration bag wall plane of at least one surface fold at a distance from the wall of the hollow for accommodation of the filtering bag) and at least one second device ensuring holding at a distance (so that the device holds the unfolded areas of at least one surface fold at a distance from the wall of the hollow for accommodation of the filtering bag).

EFFECT: design improvement.

7 cl, 4 dwg

Description

The technical field of the invention

The invention relates to dust suction devices comprising a vacuum cleaner and a filter bag, which is made in the form of a filter bag of non-woven material, in the form of a replaceable filter bag and in the form of a flat bag with surface folds.

State of the art

Filter bags in the form of replaceable flat non-woven bags are those filter bags that are currently used most often. The advantage of non-woven bags (compared to paper filter bags) is a significantly larger dust-collecting capacity of the filter bag with higher separation performance and longer service life. The shape of a flat bag is the most common shape of non-woven bags, since a bag with this shape can be made in a very simple way. Since, unlike paper filter material used in filter bags made of paper, non-woven filter material can be folded for a long time only with very great difficulty due to the high elasticity of recovery, the production of more complex shapes of bags, for example, bags with a rectangular bottom or other shapes of a bag containing the bottom is very labor intensive and expensive.

A flat bag in the sense of the present invention is understood to mean a filter bag whose walls are formed of two separate layers of filter material with identical surfaces, so that both separate layers are connected to each other only at their peripheral edges (of course, the concept of the same surfaces does not exclude that both separate layers differ from each other in that one of the layers has an inlet).

The connection of the individual layers can be realized by means of a weld or adhesive joint along the entire periphery of both separate layers. It can also be accomplished by bending one separate layer of filter material around one of its axes of symmetry, and the remaining open peripheral edges of the two separate layers thus formed are welded or glued (the so-called bag bag). Accordingly, in this manufacture three welded or adhesive joints are required. In this case, two of these seams form the edge of the filter bag, and the third weld can also form the edge of the filter bag or can be located on one of the walls of the filter bag.

Moreover, one separate layer of filter material, taken by itself, can consist of one or more layers, which, for example, can be layered on top of each other.

Flat bags in the sense of the present invention may also have so-called side folds. Moreover, these lateral folds can be made with the possibility of full expansion. A flat bag with such side folds is described, for example, in DE 202005000917 U1 (see FIG. 1 with folded side folds and FIG. 3 with extended side folds). Alternatively, the lateral folds may be welded with portions of the peripheral edge. Such a flat bag is described in DE 102008006769 A1 (see there, in particular, FIG. 1).

From the above definition of the concept of a flat bag, it inevitably follows that immediately after manufacture, the flat bags are two-dimensional products, that is, before use, they have an internal volume that is essentially zero.

Of course, a filter bag with an internal volume, which (before use) is essentially zero, is not necessarily a flat bag in the sense of the present invention. Bag shapes containing a bottom and described, for example, in DE 202005016309 U1 or DE 202009004433 U1, are not flat bags, since they do not consist of two separate layers with identical surfaces that are connected to each other only at their peripheral edges.

Taking into account the above definitions, it goes without saying that the shapes of the bags, which after manufacturing are already three-dimensional products and thus have an internal volume other than zero, and which are described, for example, in WO 00/00269 (see there Fig.27 and 28) and in DE 102007060748 (see there, in particular, Fig.9), are not flat bags in the sense of the present invention.

A non-woven filter bag in the sense of the present invention comprises a non-woven filter material. The non-woven material may be a non-woven fabric laid in a dry or wet manner, or an extrusion non-woven material, in particular a microfiber non-woven fabric obtained by melt molding (non-woven fabric obtained by melt blowing), or spunbond non-woven material (Spunbond). Additionally, layers of nanofibers may also be present. The distinction between wet laid nonwovens (Nonwovens) and traditional wet laid paper is made according to the definition below, which is also used in EDANA (International Association of Nonwovens and Related Services). Thus, traditional (filter) paper is not a nonwoven.

Non-woven material may include staple fibers or elementary fibers. Technologically, several layers of staple fibers or elementary fibers can also be provided, which are reinforced with the formation of exactly one layer of non-woven material.

The filtering material may also be a layered material consisting of several layers of nonwoven materials, for example, filament spunbond nonwoven material and meltblown nonwoven fabric (SMS, SMMS or Sn × MS). Such a laminate may be laminated with hot melt adhesive or calendaring. The meltblown nonwoven layer may be creped.

The term “Nonwoven” is used according to the definition of ISO 9092: 1988 or the standard EN 29092. In particular, as follows, the concepts of fleece or woven and non-woven are distinguished in the field of non-woven materials in the manner described below, and they should also be understood in the sense of the present invention. For the manufacture of non-woven material used fibers and / or elementary fibers. Loose or loose and not yet bonded fibers and / or elementary fibers are designated as a comb or fleece (Web). By means of the so-called weaving bonding step, a nonwoven material is finally formed from such a fleece that is sufficiently strong to, for example, be wound into rolls. In other words, through hardening, the nonwoven material becomes self-supporting (Details of the application of the definitions and / or methods described here can also be found in the standard textbook “Vliesstoffe”, W. Albrecht, H. Fuchs, W. Kittelmann, Wiley-VCH, 2000).

The wall of the filter bag has at least one surface fold. How such surface folds can be formed is described, for example, in European patent application 10163463.2 (see, in particular, FIG. 10a and FIG. 10b, or FIG. 11a and FIG. 11b). If the wall of the filter bag includes several surface folds, this material is also referred to as pleated filter material. Such pleated walls of the filter bag are described in European Patent Application 10002964.4.

Figure 1 and figure 2 in cross section shows a filter bag with a wall, which respectively has two surface folds. Thanks to such surface folds, the filtering surface of the filter bag increases, resulting in a large dust-collecting capacity of the filter bag with higher separation performance and longer service life (respectively, compared to a filter bag with the same outer dimensions and without surface folds).

1 shows a filter bag 1 comprising a wall 10 of a filter bag, which has two surface folds 11 in the form of so-called dovetail folds. The filter bag is shown here in cross section through its middle. In accordance with this, the longitudinal axis of the surface folds extend in a plane which, in turn, extends perpendicular to the plane of the drawing, and the surface folds pass at their longitudinal ends into welds of the filter bag extending parallel to the plane of the drawing and located in front of and behind the drawing plane . Thus, surface folds can be most flattened in the middle. The filter bag is shown here in a state in which the surface folds are already slightly flattened. Each dovetail fold 11 has regions 11a that lie in the plane of the filter bag wall 12 and regions 11b that protrude above the plane of the filter bag wall 12. These areas 11b during the initial insertion of the filter bag into the vacuum cleaner are not yet straightened.

2 shows a filter bag 2 comprising a wall 20 of a filter bag that has two surface folds 21 in the form of so-called triangular folds. The filter bag is also shown here in cross section through its middle. In accordance with this, the longitudinal axis of the surface folds extend in a plane which, in turn, extends perpendicular to the plane of the drawing, and the surface folds pass at their longitudinal ends into welds of the filter bag extending parallel to the plane of the drawing and located in front of and behind the drawing plane . Thus, surface folds can be most flattened in the middle. The filter bag is also shown here in a state in which the surface folds are already slightly flattened. Each triangular fold 21 has regions 21a that lie in the plane of the wall 22 of the filter bag and regions 21b that protrude above the plane of the wall 22 of the filter bag. These areas 21b during the initial insertion of the filter bag into the vacuum cleaner are not yet straightened.

The second wall of the filter bag shown in FIG. 1 and FIG. 2 does not have surface folds. Of course, this second wall of the filter bag may also have one or more surface folds.

Along with the surface folds shown in FIGS. 1 and 2, surface folds with other shapes are also possible. The fact that in the embodiments of FIGS. 1 and 2 surface folds extend perpendicular to the edge of the bag is not to be understood as a limitation. Of course, surface folds can also extend at an angle to the edges of the bag.

Vacuum cleaners known in the art have cavities for accommodating a rigid-walled filter bag. In order for the filter bag to be able to exert its filtering effect, these walls have spacing devices in the form of ribs or sections in the form of ribs, which prevent the filter bag from adhering its filter surface to the wall of the cavity to accommodate the filter bag, and effective the filtering surface is therefore reduced.

Description of the invention

In view of this state of the art, the invention is based on the task of improving the prior art dust suction device comprising a vacuum cleaner and a filter bag, in such a way that the dust collecting capacity of the filter bag is further increased with higher separation performance and longer service life.

This problem is solved by means of a device for suctioning dust containing a vacuum cleaner and a filter bag according to claim 1, that is, by means of a device in which the filter bag is made in the form of a filter bag of non-woven material, in the form of a replaceable filter bag and in the form of a flat bag comprising the first and second walls of the filter bag, and in which the filter bag has at least one surface fold, with each surface fold having regions that lie in a plane walls of the filter bag, and areas that protrude above the plane of the wall of the filter bag and are arranged to expand during operation of the vacuum cleaner, and in which the vacuum cleaner has a cavity for accommodating the filter bag with rigid walls, at least at least one wall is provided on the walls of the cavity for accommodating the filter bag one first distance-holding device in such a way that it holds the regions of at least one surface fold lying in the plane of the filter bag wall and a distance from the wall of the cavity to accommodate the filter bag, and at least one second distance-holding device, so that it holds the straightened areas of at least one surface fold at a distance from the wall of the cavity to accommodate the filter bag.

Due to the presence of these special distance-holding devices for areas of surface folds that lie in the plane of the filter bag wall and the special distance-holding devices for areas of surface folds that protrude above this plane, the surface folds can be expanded in such a way that large part of the surface of the filter material forming surface folds. Due to this, the effective filtering surface of the filter bag is increased (compared with the use in a traditional vacuum cleaner), so that, compared to this traditional device, the dust bag dust storage capacity can be further increased with higher separation performance and longer service life.

According to one preferred refinement of the invention, the height of the first and / or second distance-holding devices with respect to the wall of the cavity for accommodating the filter bag may be in the range of 5 mm to 60 mm, preferably 10 mm to 30 mm. Due to these dimensions, the optimum adaptation of the cavity can be achieved to accommodate the filter bag to the filter bag with surface folds.

In accordance with another improvement of the invention described above, each first and every second distance-holding device may be in the form of a jumper having the shape of a section jumper, a bracket having the shape of a section bracket, a rib having the shape of a section rib and / or protrusion. Due to this improvement, a relatively uniform optimum flow around the filter surface of the entire filter bag can be achieved in the cavity for receiving the filter bag of the vacuum cleaner.

According to another improvement of the invention described above, each first and every second distance-holding devices can be integrally formed with the wall of the cavity to accommodate the filter bag. For example, a cavity for accommodating a filter bag of a vacuum cleaner can be manufactured by a die casting method. This provides a simple and economical manufacture of cavities for accommodating the filter bag.

Alternatively, all the first and all second distance-holding devices may be in the form of a cage-shaped insert, which is provided in the cavity for receiving the filter bag. Thanks to this improvement, existing vacuum cleaners can be additionally equipped. In this case, the cell-shaped insert can be adapted to be removed from the cavity to accommodate the filter bag and reinserted into it.

According to one improvement of the invention described above, the filter bag may have several, preferably from three to seven, surface folds in the first layer of the wall of the filter bag and / or several, preferably from three to seven, surface folds in the second layer of the wall of the filter bag. Unexpectedly, it turned out that with this configuration, an optimal ratio can be achieved between the dust collecting capacity of the filter bag with high separation performance and long service life and the economical manufacture of the filter bag

Brief Description of the Drawings

The following drawings serve to explain the state of the art and invention. They depict:

figure 1 - filter bag, known in the art, containing two surface folds in the form of a dovetail;

figure 2 - filter bag, known in the art, containing two surface folds in the form of triangular folds;

figure 3 is a first embodiment of the present invention; and

4 is a second embodiment of the present invention.

Description of Preferred Embodiments

Figure 3 shows a first embodiment of the present invention. This embodiment is particularly suitable for a dovetail pleated filter bag, which is shown in FIG.

Figure 3 shows a filter bag with fully extended surface folds 31. The regions 31a that lie in the plane of the wall 32 of the filter bag are held at a distance from the wall of the cavity 33 to accommodate the filter bag with the first distance-holding device 35. The regions 31b that protrude the plane of the wall 32 of the filter bag are held at a distance from the wall of the cavity 33 to accommodate the filter bag with the second distance-holding device 36.

As is apparent from FIG. 3, the height of the first and second distance-holding devices depends on both the size of the surface fold and the shape of the cavity for accommodating the filter bag. If the cavity for accommodating the filter bag has, as in the embodiment of FIG. 3, a shape that is similar to the shape of the filter bag during operation, the distance-holding device can be made smaller than when the cavity for accommodating the filter bag, as this is the usual state of the art, has a substantially rectangular parallelepiped shape. In the latter case, in particular, if the filter bag has several surface folds, the first distance-holding devices for different surface folds have different sizes. The same applies to the second distance-holding devices (see, in this respect, the embodiment described with reference to FIG. 4).

The first and second distance-holding devices are made in the present embodiment in the form of sections made in the form of jumpers that partially extend along the surface folds.

According to this embodiment, the first and second distance-holding devices are integrally formed with the wall of the cavity 33 for receiving the filter bag. This makes it possible to easily manufacture a cavity for accommodating a filter bag, for example, by means of an injection molding method.

Alternatively, the first and second distance-holding devices may also be in the form of ribs having the form of ribs of a portion and / or protrusion.

Figure 4 shows a second embodiment of the present invention. This embodiment is particularly suitable for a filter bag with triangular folds, which is shown in figure 2.

Fig. 4 shows a filter bag with fully extended surface folds 41. The regions 41a that lie in the plane of the wall of the filter bag 42 are held at a distance from the cavity wall to accommodate the filter bag with the first distance-holding device 45. The regions 41b that protrude above the plane the walls 42 of the filter bag are held at a distance from the wall of the cavity to accommodate the filter bag with the second distance-holding device 46.

With regard to the shape and dimensions of the first and second distance-holding devices, the same applies as for the first embodiment.

According to a third embodiment of the invention (not shown), the first and second distance-holding devices are provided in the form of a cage. In this case, the outer shape of this cell is defined by the second distance-holding devices that hold the areas of surface folds protruding outward above the plane of the wall of the filter bag. In a rational manner, all the rods that form the second distance-holding devices extend substantially parallel to each other and substantially parallel to the surface folds of the filter bag when it is properly inserted into the cage. Also, substantially parallel to these rods are rods that form the first distance-holding devices. These rods display the shape of the planes of the filter bag and, accordingly, protrude into the cell formed by the second distance-holding devices.

If required, cage rods can also be provided that extend at an angle, in particular perpendicular to those rods that form the first and second distance-holding devices. Such angled rods serve to stabilize certain areas of the filter bag, such as the inlet region.

Claims (7)

1. A device for suctioning dust, containing a vacuum cleaner and a filter bag, in which
the filter bag is made in the form of a filter bag of non-woven material, in the form of a replaceable filter bag and in the form of a flat bag containing the first and second walls of the filter bag,
the filter bag has at least one surface fold, wherein each surface fold has areas that lie in the plane of the wall of the filter bag, and areas that protrude above the plane of the wall of the filter bag and can be expanded when the vacuum cleaner is operating,
the vacuum cleaner has a cavity for accommodating a filter bag with rigid walls, while on the walls of the cavity for accommodating a filter bag
at least one first distance-holding device is provided in such a way that it holds the regions of the at least one surface fold lying in the plane of the filter bag wall at a distance from the cavity wall to accommodate the filter bag, and
at least one second distance-holding device is provided so that it holds the expanded areas of at least one surface fold away from the cavity wall to accommodate the filter bag. 2. The device according to claim 1, in which the height of the first and / or second distance-keeping devices with respect to the wall of the cavity for accommodating the filter bag is in the range from 5 mm to 60 mm, preferably from 10 mm to 30 mm. 3. The device according to one of claims 1 and 2, in which each first and every second distance-holding device is made in the form of a jumper having the shape of a section jumper, a bracket having the shape of a section bracket, a rib having the shape of a section rib and / or protrusion . 4. The device according to one of claims 1 and 2, in which each first and every second distance-holding devices are made integrally with the wall of the cavity to accommodate the filter bag. 5. The device according to one of claims 1 and 2, in which all the first and all second distance-holding devices are made in the form of a cell-shaped insert, which is provided in the cavity for accommodating the filter bag. 6. The device according to claim 5, in which the cell-shaped insert is made with the possibility of extraction from the cavity to accommodate the filter bag and reinsert it. 7. The device according to one of claims 1 and 2, 6, in which the filter bag has several, preferably from three to seven, surface folds in the first layer of the wall of the filter bag and / or several, preferably from three to seven, surface folds in the second a layer of the wall of the filter bag.

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