DE102020213873A1 - Compressible screen component for a separation system - Google Patents

Abstract

A sieve component (103) for a separating system is described, the separating system comprising a housing (100) for accommodating the sieve component (103). The screen component (103) comprises a supporting structure (161, 162, 330) with a sheet-like screen material, through which, in an expanded state of the screen component (103), a longitudinal axis (109) of the screen component (103) extending, cylindrical screen surface (154) is formed. The screen component (103) is designed to be upset along the longitudinal axis (109) with a certain degree of compression in order to convert the screen component (103) into a compressed state for reception in the housing (100) of the separation system. Furthermore, the screen component (103) is designed in such a way that an effective area of the screen surface (154) available for filtering an air flow (121) in the compressed state does not exceed the effective area of the screen surface (154) in the expanded state, or by less than the degree of compression falls below

Description

The invention relates to a screen component for a separating system. In particular, the invention relates to a screen component with the largest possible screen or active surface.

A suction device with a separating system typically has a suction mouth, via which impurities, in particular dust particles, are sucked up from a surface to be cleaned by means of a (suction) air flow. The air flow can be effected by a fan arranged behind an air filter of the separation system. The dirt, in particular relatively large dust particles, are conveyed by the air flow from the suction mouth into a collection container or collection area. However, smaller and/or relatively light particles, in particular fluff, can be conveyed to the air filter with the air flow, which can lead to the air filter becoming clogged relatively quickly and thus to reduced suction power.

To protect the air filter, a (lint) filter can be arranged in front of the air filter, which is designed to hold back relatively small and/or light particles in order to prevent the air filter from clogging too quickly. The sieve should have the largest possible sieve or active surface in order to enable the highest possible suction power over the longest possible period of time.

This document deals with the technical task of providing a screen component that can be produced efficiently and has the largest possible effective area.

The object is solved by the subject matter of the independent patent claim. Advantageous embodiments are defined in particular in the dependent patent claims, described in the following description or shown in the attached drawing.

According to one aspect of the invention, a screen component for a separation system is described. The screen component can be designed to screen the suction air flow in advance of filtering a suction air flow through an air filter (e.g. through a fine dust filter and/or through a HEPA filter and/or through a lamellar filter), to remove relatively coarse dirt from the suction air flow. The screen component can include a screen surface with a screen material that has a specific pore size or mesh size.

The separating system has a housing for accommodating the screen component. In this case, the housing can have a (cylindrical, in particular circular-cylindrical) housing wall which is arranged around a longitudinal axis of the housing. Furthermore, the housing (in particular on the underside) can have a cover, in particular a flap, which can be opened in order to be able to insert or remove the screen component along the longitudinal axis into the housing. Furthermore, by opening the cover, the collection area of the separation system can be opened and emptied of impurities. The cover can be closed for the operation of the separation system.

The screen component includes a supporting structure with a sheet-like screen material, so that when the screen component is in an expanded state, a cylindrical screen surface is formed running around the longitudinal axis of the screen component or the housing. The screen component can thus form a screen cylinder in the expanded state. The (cylindrical) screen component can then be pushed into the (cylindrical) housing along the longitudinal axis.

The screen component can be designed to be upset along the longitudinal axis with a certain degree of compression in order to convert the screen component into a compressed state for accommodation in the housing of the separation system. A degree of compression of 15% or more, or of 20% or more, can preferably be made possible here. The housing may be formed such that the housing has a length along the longitudinal axis that is less than the length of the screen member along the longitudinal axis (in the expanded state). The relative difference in length can correspond to the degree of compression. In order to still be able to arrange the screen component in the housing (with the cover closed), the screen component can be designed to be compressible along the longitudinal axis. In the compressed state, the screen component then has the length of the housing.

The screen component is also designed in such a way that the effective area of the screen surface of the screen component available for filtering or screening an air flow in the compressed state is not at all or less than the degree of compression less than the effective area of the screen surface of the screen component in the expanded state . The screen component can thus be designed to be compressible in such a way that the expansion of the screen component along the longitudinal axis can be reduced (in order to reduce the space required for the screen component), but that the effective surface of the screen component is not or only is partially reduced. A screen component with a relatively large effective area can thus be provided in a space-efficient manner. The enlargement of the effective effective area allows It is also important to reduce the screen openings or the pore size of the screen material in order to reduce the dust content for the downstream filter.

The screen component, in particular the supporting structure of the screen component and/or the screen material, can be designed in such a way that, in the compressed state, the screen surface does not have a section in which several layers of the screen material lie directly on top of each other, or at least that the proportion of the screen surface in which several layers of the screen material lie directly on top of each other is smaller than the degree of compression. The (at least partial or complete) preservation of the active surface can thus be achieved in a reliable manner by preventing the formation of overlapping screen material (also during suction operation of the separating system).

The screen material can, for. B. have such a high rigidity that even in the compressed state of the screen component, several layers of the screen material do not lie directly on top of each other. A compressible screen component can thus be provided in a particularly efficient manner by selecting a suitable screen material.

The screen material can have a plurality of support ribs, the support ribs being distributed, in particular, on the lateral surface of the cylindrical screen component, i. H. on the screen surface, can be arranged. A support rib can, for. B. include a punched into the screen material crease of the screen material. Alternatively or additionally, the support rib can comprise a contour sprayed, cast, glued and/or painted onto the screen material.

The support ribs can be designed to support and/or fold the screen material in the compressed state of the screen component, in particular in such a way that folds of the screen material that form due to the compression are kept at a distance from one another (also during suction operation of the separating system) . A compressible screen component can be provided in an efficient manner by attaching and/or integrating support ribs on or in the screen material. In particular, the ribs can cause the screen component to be tensioned in such a way, even in the compressed state, that the screen surface does not lie on top of one another, or not substantially in several layers.

The supporting structure can comprise a first support frame (in particular a support ring) to which a first edge of the (cylindrical) screen surface is fixed. The first support frame can e.g. B. be arranged on the lower edge of the screen surface, and/or the first support frame can be arranged on the edge facing the lid of the housing of the separation system. Furthermore, the supporting structure can comprise a second support frame (in particular a support ring) to which the second edge of the screen surface opposite the first edge is fastened (which eg faces the fan of the separating system or the suction device).

The screen component can be designed in such a way that the first support frame can be brought closer to the second support frame in order to upset the screen component along the longitudinal axis. By providing a support frame, a stable, load-bearing and compressible structure of the screen component can be provided.

The supporting structure may comprise one or more (e.g. two, three or more) struts, each running along a helix (on the lateral surface of the screen component) around the longitudinal axis between the first support frame and the second support frame. The screen material can be attached to the one or more struts. The one or more struts can each be designed as a torsion spring.

The supporting structure can be designed, in particular due to the one or more struts, to be compressed along the longitudinal axis when the first support frame is twisted relative to the second support frame, in particular in the direction of rotation specified by the helix. A twisting of the screen material or the screen surface can thus be brought about in order to bring about a compression along the longitudinal axis in a reliable manner, without reducing the effective surface of the screen component.

The supporting structure can comprise a basket which is connected to the first support frame and which encloses the area of the screen surface which faces the first support frame. For example, 30% or more of the screen area can be enclosed by the basket. The screen surface is preferably not attached to the basket, apart from being attached to the first support frame.

The basket can include one or more guide elements, in particular sliding blocks and/or rollers, which are designed to be guided in one or more corresponding guide grooves on the inside of the housing, in particular on the inside of the housing wall of the housing, in order to have one or more to form links which cause the first support frame to rotate relative to the second support frame (to upset the screen component) when the first support frame is moved towards the second support frame (e.g. when the lid is closed, and thereby on acts on the first support frame). By providing one or more (in particular two, three or more) links, the twisting to compress the screen component can be effected in a particularly reliable and convenient manner.

The basket can be designed in such a way that the second support frame rests on the basket on the side facing away from the first support frame when the screen component is in the compressed state. A particularly stable screen component can thus be provided.

Alternatively or in addition, the supporting structure can comprise a plurality of hinge strips which each run between the first support frame and the second support frame. The screen material can be attached to the hinge strips. A hinge strip may include one or more hinges and (rigid) connecting webs adjacent to the one or more hinges. The one or more hinges may each be configured to flex radially toward or away from the longitudinal axis to reduce the spacing between the first support frame and the second support frame. A screen component can thus be provided which can be folded together in a manner similar to an accordion. The screen material can be reliably kept at a distance by the hinge strips even in the folded or compressed state.

The hinge strips can be designed in such a way that the arc length of the screen surface in the tangential direction around the longitudinal axis remains unchanged when the screen component is compressed. In this case, the arc length can remain unchanged, in particular at all heights of the screen component along the longitudinal axis. This can be brought about in particular by a defined arrangement of the hinge strips in relation to one another. By maintaining the arc length, i. H. of the circumference, of the screen surface, mechanical stress on the screen material when the screen component is compressed can be avoided in a reliable manner.

The supporting structure may comprise at least two hinge strips 180° offset from each other (i.e. directly opposite each other) attached to the first and second support frames, respectively. The one or more hinges of the two hinge strips can each be arranged in pairs at the same height along the longitudinal axis. Furthermore, the hinges of the two hinge strips that are at the same level can have the same buckling direction radially away from the longitudinal axis or up to the longitudinal axis.

Alternatively or additionally, the load-bearing structure can comprise at least two hinge strips, which are each attached to the first and second support frames offset by 90° with respect to one another. The one or more hinges of the two hinge strips can each be arranged in pairs at the same height along the longitudinal axis. The hinges of the two hinge strips, which are at the same height, can have opposite bending directions.

Such a coordinated arrangement of the hinge strips and/or the buckling direction of the hinges can ensure in an efficient and reliable manner that the arc length of the screen surface remains unchanged when the screen component is compressed. In particular, the hinge strips can be arranged and/or designed in such a way that the cross section (perpendicular to the longitudinal axis) of the screen surface (at a kink) changes from a circle in the uncompressed state to an ellipse in the compressed state with a constant arc length. An ellipse rotated by 90° around the longitudinal axis can then be formed in the compressed state at the level of the subsequent buckling point of the hinge strips.

The supporting structure can comprise a number of foldable elements which can be arranged at different points on the outer surface of the screen component. The foldable elements can each be connected to the first support frame on a first side and to the second support frame on a second side, so that the individual foldable elements are folded together when the first support frame is moved towards the second support frame.

The foldable elements can each be connected to the screen surface at a connection point. Furthermore, the foldable elements can each be designed to displace the screen surface at the respective connection point in a tangential direction around the longitudinal axis when the respective foldable element is folded together. A tangential displacement of the screen material can thus be brought about when the screen component is compressed, in order to maintain the effective surface of the screen component even in the compressed state.

According to a further aspect, a separating system for a suction device (in particular for a vacuum cleaner or a vacuum robot) is described. The separation system includes a housing having a housing wall extending around the longitudinal axis of the housing. Furthermore, the separating system includes a screen component described in this document, which is configured compressed along the longitudinal axis to be to arrange the screen component in the housing.

As already explained above, the housing can include a cover, in particular a flap, which is designed to cover the housing wall. The screen member may be configured to automatically transition from the expanded state to the compressed state when the lid is closed. Alternatively or additionally, the sieve component can be designed to automatically change from the compressed state to the expanded state when the lid is opened. In this way, a particularly convenient compression and/or cleaning of the screen component can be effected.

According to a further aspect, a suction device is described which comprises the separation system described in this document.

It should be noted that any aspect of the screen component and/or the separating system described in this document can be combined with one another in a variety of ways. In particular, the features of the patent claims can be combined with one another in many different ways.

• 1a ein beispielhaftes Gehäuse eines Abscheidesystems für eine Saugvorrichtung mit einem geöffneten Deckel;
• 1b das Gehäuse aus 1a mit einem geschlossenen Deckel;
• 1c und 1d ein beispielhaftes Sieb-Bauteil in einem ausgedehnten Zustand;
• 1e das Sieb-Bauteil aus 1c in einem gestauchten Zustand;
• 2a und 2b ein beispielhaftes Sieb-Bauteil mit Scharnierbalken bzw. Scharnierstreifen;
• 2c das Gehäuse eines Abscheidesystems mit dem Sieb-Bauteil aus 2a;
• 3a und 3b Sieb-Bauteile mit unterschiedlich verlaufenden Stütz- bzw. Formrippen; und
• 3c und 3d Sieb-Bauteile mit einem tangentialen Verschiebemechanismus.

The invention is described in more detail below with reference to exemplary embodiments illustrated in the attached drawing. show:

• 1a an exemplary housing of a separation system for an aspirator with an open lid;
• 1b the housing off 1a with a closed lid;
• 1c and 1d an exemplary screen component in an expanded state;
• 1e the sieve component 1c in an upset condition;
• 2a and 2 B an exemplary screen component with hinge beams or hinge strips;
• 2c the housing of a separation system with the screen component 2a ;
• 3a and 3b Sieve components with differently running supporting or shaped ribs; and
• 3c and 3d Screen components with a tangential displacement mechanism.

As explained at the outset, the present document deals with the provision of a screen component that can be produced efficiently and is space-efficient and has the largest possible effective area. In this context shows 1a an exemplary housing 100 of a separation system for an aspirator. The housing 100 comprises a housing wall 101, possibly cylindrical, which encloses a cavity for receiving a screen component 103. The screen component 103 can have the form of a hollow cylinder in which the impurities sucked up by the suction device are collected.

The suction air flow 121 coming from a suction mouth of the suction device can enter the housing 100, in particular the cavity 105 of the screen component 103, through an inlet channel 102. The air flow 121 can then pass through the screen surface of the screen component 103 from the inside out, with the impurities in the air flow 121 being retained in the cavity 105 of the screen component 103 . The cavity 105 enclosed by the sieve component 103 thus forms a collection area for impurities that have been sucked up.

After passing through the screen surface, e.g. B. tangential to the screen surface of the screen component 103, to an air filter 104, wherein the air filter 104 is set up to filter fine impurities from the air flow 122. The filtered air flow 123 then reaches a fan (not shown) of the suction device, which is set up to generate the suction air flow 121 .

The housing 100 can e.g. B. have a cover 113 on an underside, which is designed to cover the (cylindrical) housing wall 101 and / or the cavity 105 of the screen component 103. The cover 113 can thus ensure that the impurities collected in the cavity 105 remain in the cavity 105 . Furthermore, the housing 100 can be designed in such a way that the cover 113 can be removed from the housing wall 101 (e.g. opened) in order to open the cavity 105 for emptying. in the in 1a In the example shown, the cover 113 is movably attached to the housing 110 via an axis 114, so that the cover 113 can be opened or closed.

This in 1a The sieve component 103 shown is configured such that the length of the sieve component 103 in an expanded state along the longitudinal or vertical axis 109 of the sieve component 103 is greater than the length of the cavity formed by the housing wall 101 and the closed cover 113 is. For example, when expanded, the screen component 103 may be 20% or more longer than the cavity of the housing 100 for receiving the screen component 103 .

Furthermore, the screen component 103 can be designed to be compressed and/or compressed along the longitudinal or vertical axis 109 of the screen component 103 . This is an example in 1b shown. In particular shows 1b the case 100 off 1a with a closed lid 113. Off 1b it can be seen that the screen surface 154 of the screen component 103 has a constriction 156 which is caused by the upsetting 131 of the screen component 103 along the longitudinal or vertical axis 109 of the screen component 103 . Furthermore, as part of the compression 131, a relative rotation 130 of the edges 141, 142 of the screen component 103 about the longitudinal or vertical axis 109 of the screen component 103 can be brought about, so that the screen surface 154 is tensioned and thus also in the compressed state of the Sieve component 103 the effective surface of the sieve component 103 is retained. In particular, it can be achieved in this way that essentially the entire screen surface 154 of the screen component 103 is retained as the active surface of the screen component 103 .

A screen component 103 is thus described which is compressed by closing the cover 113 of the housing 100 of a separating system, but which at least largely retains the effective surface of the screen component 103 . In the suction mode of the suction device, a suction air flow 121 can thus be made possible through a sieve component 103 with a relatively large effective area in order to collect impurities in the cavity 105 enclosed by the sieve component 103 .

The screen component 103 may be configured (e.g., spring-like) such that when the lid 113 is opened, the screen component 103 automatically expands from the compressed state to the expanded state. This movement of the sieve component 103 has the effect that impurities adhering to the sieve surface 154 are automatically shaken off the sieve surface 154, so that the sieve component 103 can be cleaned easily.

1c and 1d show an example screen component 103 in the expanded state. The screen component 103 can have a (cylindrical) basket 155 on a first edge 141 , which encloses a partial area, in particular the partial area facing the first edge 141 , of the screen surface 154 . The basket 155 can have a lattice structure with openings, so that the basket 155 covers the sieve surface 154 as little as possible.

The screen component 103, in particular the supporting structure of the screen component 103, can have a first support frame, in particular a support ring, 161 on the first edge 141 and a second support frame, in particular a support ring, on the opposite second edge 142 along the longitudinal axis 109. 162 have. The support frames 161, 162 may each be circular. Furthermore, the screen component 103 can have ribs 153 which run between the two support frames 161, 162, e.g. B. run obliquely, as in 1c shown. The screen surface 154, in particular the sheet-like screen material of the screen surface 154, can be attached to the support frames 161, 162 and the ribs 153. The (circular-cylindrical) shape of the screen surface 154 can be formed by the support frames 161, 162 and the ribs 153. In particular, the supporting structure for the screen surface 154 can be formed by the support frames 161, 162 and the ribs 153.

The supporting structure formed by the support frames 161, 162 and the ribs 153 can be designed to be flexible in such a way that the structure can be compressed along the longitudinal axis 109 of the screen component 103. Furthermore, as part of the upsetting 130, the support frames 161, 162 can be twisted relative to one another (about the longitudinal axis 109) in order to maintain the tension of the screen surface 154. In particular, the supporting structure can be designed in such a way that the compression along the longitudinal axis 109 is brought about by the relative twisting of the support frames 161, 162 with respect to one another.

the 1c and 1d 12 further show an access opening 152 of the screen component 103, the access opening 152 facing the inlet channel 102 of the housing 100 of the separation system. In particular, the air flow 121 can be directed from the suction mouth of the suction device through the access opening 152 into the cavity 105 enclosed by the screen component 103 . The air flow 121 can then penetrate through the screen surface 154 from the inside to the outside, so that impurities from the air flow 121 are retained on the inside of the screen surface 154 .

1e shows the screen component 103 of FIGS 1c and 1d in compressed condition. In the compressed state, the second support frame 162 can optionally rest on the basket 155 of the screen component 103, so that the second support frame 162 forms a cover for the basket 155. The screen component 103 may be in the compressed state when the screen component 103 is in the housing 100 of a suction device with the lid 113 closed. When the lid 113 is opened, the screen member 103 can be automatically brought into the expanded state (as shown in Figs 1c and 1d shown).

On the inside of the housing wall 101 of the housing 100, one or more guide grooves (running obliquely upwards) (not shown places) be arranged, in which one or more corresponding guide elements 159 (e.g. bolts or rollers or wheels) of the basket 155 are movably arranged. In particular, two, three or more guide grooves and corresponding guide elements 159 can be provided. The one or more guide grooves and guide elements 159 can automatically cause a relative rotation of the basket 155 (and thus the first support frame 161) relative to the second support frame 162 when the basket 155, e.g. B. when closing the lid 113, in the housing 100 is pressed. Reliable compression of the sieve component 103 can thus be made possible.

2a and 2 B 12 shows an exemplary screen component 103 with hinge webs 205 that extend between the support frames 161, 162 of the screen component 103 to form a supporting structure for the screen surface 154. FIG. A hinge web 205 can include one or more segments that are connected to one another in pairs via a movable hinge 204 . By folding the hinge webs 205 together, the sieve component 103 can be compressed. Furthermore, the folding of the hinge webs 205 causes a deformation of the sieve surface 154 without reducing the effective surface of the sieve component 103 in the process. In particular, the screen component 103 can be deformed in such a way that on an imaginary plane, perpendicular to the longitudinal axis 109, the screen surface 154 or the screen material is pulled outwards on two opposite hinges 204, while in the same plane by 90° twists two more opposing hinges 204 to push the screen material inward. In this way, an ellipse with the same arc length as the circle in the uncompressed state is created in this plane.

As in 2c shown, the screen component 103 can be designed to be positioned in the housing 100 of a separating system in such a way that at least one hinge web 205 is folded together when the cover 113 is closed. Reliable upsetting 131 of the screen component 103 can thus be made possible. In particular, a lever 206 on the cover 113 can be used to ensure that the screen component 103 is not pushed to the side by the closing cover 113 and is jammed between the cover 113 and the housing, but that the screen component 103 is pushed along the longitudinal axis 109 by the Lid 113 is raised and thereby folds together neatly.

3a and 3b show exemplary screen components 103 with support ribs 303, which are attached to the screen surface 154 as supports and/or are integrated into the screen surface 154. For example, the one or more support ribs 303 can be implemented by local reinforcement or gluing of the screen material. In the 3a Supporting ribs 303 shown are arcuate, and the 3b Supporting ribs 303 shown are curved. The support ribs 303 can be designed to stiffen the screen surface 154 in such a way that the screen component 103 is in the expanded state without the action of an external force. On the other hand, the support ribs 303 can be designed to be flexible and/or elastic in such a way that the support ribs 303 can be deformed by an external force in order to convert the screen component 103 into the compressed state. The one or more support ribs 303 can be used to ensure that, even when the screen component 103 is compressed, several layers of the screen material do not cover one another, which would lead to a reduction in the effective area.

3c and 3d Figure 12 shows an exemplary screen assembly 103 that includes one or more hinged support members 335 that allow the screen surface 154 to be displaced in a tangential direction about the longitudinal axis 109. A foldable element 335 can e.g. B. be designed to be collapsed when the screen component 103 is compressed along the longitudinal direction 109. The folding joint 336 of a folding element 335 can be moved laterally, in particular in a tangential direction about the longitudinal axis 109 . The folding joint 336 can be connected to the sieve surface 154 at a connecting element 334 so that the lateral displacement of the folding joint 336 causes a lateral displacement of the sieve surface 154 .

In the in the 3c and 3d In the example shown, the sieve component 103 has an upper and a lower, non-compressible segment 331, between which a compressible segment 332 is arranged. The foldable elements 335 of the collapsible segment 332 can be attached to support frames 330 of the two non-collapsible segments 331 .

3c shows the screen component 103 in the compressed state and 3d shows the screen component 103 in the expanded state. By shifting the screen material or the screen surface 154 in a tangential direction around the longitudinal axis 109 of the screen component 103, a particularly reliable compression of the screen component 103 can be brought about without a (significant) reduction in the effective area.

A screen component 103 is thus described in this document, which comprises a tubular and/or circular-cylindrical screen surface 154 . The screen surface 154 can by a porous, sheet-like, screen material (e.g. gauze), which is formed into a tube and connected (e.g. glued together, welded and/or overmoulded) at one longitudinal edge, along the longitudinal axis 109. At the two open ends or edges 141, 142, the material can each be attached to a support frame 161, 162 (in particular to a ring).

In order to provide the largest possible active surface, the screen component 103, in particular the screen surface 154 of the screen component 103, can be designed to be compressible. For this purpose, the two support frames 161, 162 preferably have no rigid connection to one another (in particular no rigid longitudinal webs). If necessary, the two support frames 161, 162 are only connected to one another via the flexible screen material itself.

It can thus be a screen tube, d. H. a screen component 103 can be provided with the screen surface 154, which has a length along the longitudinal axis 109 which is greater than the length of the housing 100 of the separation system in which the screen tube 103 is to be installed. In order to still be able to accommodate the overly long screen tube in the housing 100, the screen tube is compressed, possibly irregularly, in the installed state. In order to prevent several layers of the screen material from being superimposed and thereby reducing the effective surface of the screen component 103, a supporting or carrying structure can be provided for the screen surface 154 and/or for the screen material. Alternatively or in addition, a screen material can be used that is so stiff that the screen material does not come into contact with one another as a result of the suction pressure during operation of the suction device.

As a supporting structure, as in the 1c until 1e shown, torsion springs 153 and sloping guide links are used to tension the screen material or the screen surface 154 . In the installed and/or compressed state, the lower support frame 161 of the screen tube is rotated about the longitudinal axis 109 (e.g. by approximately 30°). In the process, the screen material is also twisted and several (e.g. six) (equal) wavy strands are formed, as a result of which the screen material is tensioned and as a result it is possible to prevent the screen material from lying against one another.

The lower support frame 161 or the in 1d The basket 155 of the screen component 103 shown can be guided in grooves (not shown) of the housing 100 that run upwards at an angle, so that the lower support frame 161 is lifted when the flap 113 of the housing 100 of the separating system is closed and in relation to the stationary upper support frame 161 twisted. As a result, the screen material folds inward. Furthermore, the springs 153 are tensioned, which automatically relax again when the flap 113 is opened, thereby smoothing out the screen material.

In a variant without springs 153 and connecting link, the screen material can be pushed together when the flap 113 is closed. The screen material can be made stiff enough to prevent multiple layers of the screen material from lying one on top of the other.

As in the 2a and 2 B shown, several (e.g. four) folding hinges 205 can be used, which are arranged and/or fastened (in particular glued) around the screen cylinder 103 (e.g. 90° to one another). A hinge strip or beam 205 may have multiple (e.g. two or three) hinge locations 204, e.g. B. are distributed evenly over the length of the hinge strip 205. The individual hinge points 204 can be (slightly) pre-curved in the direction of the buckling. Furthermore, the buckling direction can be oriented alternately outwards and inwards. The position of the hinge points 204 is preferably at the same level for all hinge strips 205 (along the longitudinal direction 109). Opposite hinge points 204 preferably both bend outwards or both bend inwards when they are compressed 130 . The hinge strips 205, which are each offset by 90°, can also bend in the other direction, which means that the base length is almost retained at every point of the screen cylinder 103 (and the screen material is therefore not overstretched). Furthermore, overlapping of the screen material can be reliably prevented.

A wavy ellipsoid with a constant arc length perpendicular to the longitudinal axis 109 is thus produced from a circular cylinder by the compression 130 . The hinge points 204 can be realized as follows in terms of construction or material technology: by means of soft segments fastened to rigid connecting webs; one-piece due to flexible thin areas (e.g. plastic hinges) and stiff, thick-walled areas; and/or as a preformed, bonded spring wire.

In the 3c and 3d describes a screen component 103 in which the screen material can be pushed together (in the tangential direction) (if necessary with or without tensioning). When the emptying cover 113 attached to the bottom of the housing 100 is opened, the lower fluff filter ring 161 falls down under its own weight, the filter material is stretched and adhering dirt is loosened and falls down. When closing the cover 113, an arcuate ramp or nose or insertion aid 340 on the inside may be provided side of the cover 113 by means of a moderate incline in the leading edge, the lower part of the screen basket 331 can be retracted or pushed in without friction. A tongue and groove guide directly above the insertion wedge 340 can support the friction-free insertion.

As in the 3a and 3b shown, a supporting structure of the screen surface 154 can be effected in that kinks 303 (ie supporting ribs) are punched into the screen material in such a way that folding of the screen material during compression 131 is avoided. Alternatively or additionally, contours 303 can be applied (e.g. sprayed, cast and/or painted) to the screen material, which ensure that the screen material folds in in an orderly manner when it is compressed 131 and cannot lie against one another.

The present invention is not limited to the exemplary embodiments shown. In particular, it should be noted that the description and the figures are only intended to illustrate the principle of the proposed screen component and/or the separating system described.

Reference List

100

Housing

101

housing wall

102

inlet channel

103

screen component

104

air filter

105

collection area

109

longitudinal axis

113

lid / flap

114

axis (cover)

121

(dirty) airflow

122

(screened) air flow

123

(filtered) airflow

130

twist

131

compression

141

(bottom) edge / border

142

(top) edge / border

152

access opening

153

strut

154

screen surface

155

Basket

156

constriction

159

Guide element / role

161

(lower) support frame / support ring

162

(upper) support frame / support ring

204

hinge

205

hinge strips

206

lever

303

support rib

330

Support frame / support ring

331

(non-compressible) segment

332

(compressible) segment

334

Connection element / connection point

335

collapsible element

336

joint

340

Nose

Claims (15)

Screen component (103) for a separating system, the separating system comprising a housing (100) for receiving the screen component (103); whereby - The screen component (103) comprises a supporting structure (161, 162, 330) with a sheet-like screen material, through which, in an expanded state of the screen component (103), a longitudinal axis (109) of the screen Component (103) extending, cylindrical screen surface (154) is formed; - the screen component (103) is designed to be upset along the longitudinal axis (109) with a certain degree of compression in order to convert the screen component (103) into a compressed state for accommodation in the housing (100) of the separating system; - the degree of compression is in particular 15% or more; and - the screen component (103) is designed in such a way that an effective area of the screen surface (154) available for filtering an air flow (121) in the compressed state does not fall short of the effective area of the screen surface (154) in the expanded state or by less than the degree of compression . Screen component (103) according to claim 1 , wherein the screen component (103), in particular the supporting structure (161, 162, 330) and/or the screen material, is designed such that in the compressed state - the screen surface (154) has no section in which several Layers of the screen material lie directly on top of each other; or - a proportion of the screen surface (154) in which several layers of the screen material lie directly on top of one another is smaller than the degree of compression. Screen component (103) according to one of the preceding claims, wherein the screen material has such a high degree of rigidity that even in the compressed state of the screen component (103) several layers of the screen material do not lie directly on top of each other. Screen component (103) according to any one of the preceding claims, wherein - the screen material has a plurality of support ribs (303); - A support rib (303) comprises in particular - a crease of the screen material punched into the screen material; and or - A contour sprayed, cast, glued and/or painted onto the screen material; and - the support ribs (303) are designed to support and/or fold the screen material in the compressed state of the screen component (103), in particular in such a way that folds of the screen material that form due to the compression (131) are kept spaced apart will. Screen component (103) according to any one of the preceding claims, wherein - the supporting structure (161, 162, 330) comprises a first support frame (161) to which a first edge (141) of the screen surface (154) is fixed; - the supporting structure (161, 162, 330) comprises a second support frame (162) to which a second edge (142) of the screening surface (154) opposite the first edge (141) is fixed; and - The screen component (103) is designed such that the first support frame (161) can be brought closer to the second support frame (162) in order to upset the screen component (103) along the longitudinal axis (109). Screen component (103) according to claim 5 , wherein - the supporting structure (161, 162, 330) comprises a plurality of foldable elements (335); - the foldable elements (335) are each connected to the first support frame (161) on a first side and to the second support frame (162) on a second side, so that the individual foldable elements (335) are folded together when the first support frame (161) is moved toward the second support frame (162); - The foldable elements (335) are each connected at a connection point (334) to the screen surface (154); and - the foldable elements (335) are each adapted to displace the screen surface (154) at the respective connection point (334) in a tangential direction about the longitudinal axis (109) when the respective foldable element (335) is folded up. Sieve component (103) according to any one of Claims 5 until 6 wherein - the supporting structure (161, 162, 330) comprises a plurality of hinge strips (205) each extending between the first support frame (161) and the second support frame (162); - the screen material is attached to the hinge strips (205); - A hinge strip (205) comprises one or more hinges (204) and the one or more hinges (204) adjoining connecting webs; and - the one or more hinges (204) are each adapted to be folded radially toward or away from the longitudinal axis (109) to provide a spacing between the first support frame (161) and the second support frame (162) to reduce. Screen component (103) according to claim 7 , wherein the hinge strips (205) are designed in such a way that an arc length of the screen surface (204) in the tangential direction around the longitudinal axis (109) remains unchanged when upsetting (131) the screen component (103), in particular for all heights of the screen - Component (103) along the longitudinal axis (109). Sieve component (103) according to any one of Claims 7 until 8th wherein - the load-bearing structure (161, 162, 330) comprises at least two hinge strips (205) which are 180° offset from one another and are fixed to the first and second support frames (161, 162), respectively; - The one or more hinges (204) of the two hinge strips (205) are arranged in pairs at the same height along the longitudinal axis (109); and - the hinges (204) of the two hinge strips (205) at the same height have the same bending direction radially away from the longitudinal axis (109) or towards the longitudinal axis (109). Sieve component (103) according to any one of Claims 7 until 9 wherein - the supporting structure (161, 162, 330) comprises at least two hinge strips (205) which are mutually fixed at 90° to the first and second support frames (161, 162); - The one or more hinges (204) of the two hinge strips (205) are arranged in pairs at the same height along the longitudinal axis (109); and - the hinges (204) of the two hinge strips (205) have opposite bending directions at the same height. Sieve component (103) according to any one of Claims 5 until 10 , wherein - the supporting structure (161, 162, 330) comprises one or more struts (153), each along a helix about the longitudinal axis (109) between the first support frame (161) and the two th support frame (162); - the screening material is attached to the one or more struts (153); and - the supporting structure (161, 162, 330) is designed, in particular due to the one or more struts (153), to be compressed along the longitudinal axis (109) when the first support frame (161) is moved relative to the second support frame (162 ), in particular in a direction of rotation predetermined by the helix. Screen component (103) according to claim 11 , wherein - the supporting structure (161, 162, 330) comprises a basket (155) connected to the first support frame (161) and enclosing an area of the screen surface (154) facing the first support frame (161); - The screen surface (154), apart from the first support frame (161), is in particular not attached to the basket (155); and - the basket (155) comprises one or more guide elements (159), in particular sliding blocks and/or rollers, which are designed to fit in one or more corresponding guide grooves on an inside of the housing (100), in particular on an inside of a housing wall ( 101) of the housing (100) to be guided to form one or more link(s) by which a rotation (130) of the first support frame (161) relative to the second support frame (162) is effected when the first support frame (161 ) is moved towards the second support frame (162). Screen component (103) according to claim 12 , wherein the basket (155) is designed in such a way that the second support frame (162) rests on the basket (155) on a side facing away from the first support frame (161) when the screen component (103) is in the compressed state . Separation system for a suction device, the separation system comprising, - A housing (100) having a housing wall (101) running around a longitudinal axis (109) of the housing (100); and - A screen component (103) according to any one of the preceding claims, which is arranged to be upset along the longitudinal axis (109) in order to arrange the screen component (103) in the housing (100). Separation system according to Claim 14 , wherein - the housing (100) comprises a cover (113), in particular a flap, which is designed to cover the housing wall (101); and - the screen member (103) is adapted to - automatically transition from the expanded condition to the compressed condition when the lid (113) is closed; and - automatically changing from the compressed condition to the expanded condition when the lid (113) is opened.

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