DE102009031325B4 - Filter wall for ventilation and air conditioning systems in buildings - Google Patents

Abstract

Filter wall for ventilation and air conditioning systems in buildings, comprising: 1.1. an outer frame, which is divided into at least two frame segments (10), characterized in that 1.2. a frame segment (10) is formed by at least two T-shaped transverse struts (2), wherein 1.3. the at least two transverse struts (2) are manufactured in one piece from a multiply folded and / or folded sheet metal and are arranged crosswise, 1.4. the at least two transverse struts (2) are designed to fit into one another at their crossing regions (14), 1.5. at each crossing region (14) at least one of the intersecting transverse struts (2) has a slot (4) into which the other transverse strut (2) can be inserted flush, and 1.6. the intersecting transverse struts (2) each have at least one layer less in the overlapping intersection region (14), 1.7. for fixing two transverse struts (2) a connecting element is provided.

Description

The invention relates to a filter wall for ventilation systems in buildings, comprising an outer frame which is divided into at least two frame segments.

Filters for ventilation and air conditioning systems are known and versatile. They are used, for example, in operating rooms, conventional office buildings or factory buildings in which painting work is carried out, for example. An example is from the utility model DE 20 2008 011 099 U1 a filter for ventilation systems with several each angular, in particular rectangular, formed cell frame known. These cell frames, so the filter wall, consist of several frame parts, wherein adjacent frame parts are interconnected. The connection of adjacent frame parts is in this case designed such that, on the one hand, at least one frame part of each cell frame has a tab, which is designed to be bendable with respect to the contour of the cell frame, and, on the other hand, a frame part has at least one recess which engages with a tab of an adjacent frame part of an adjacent frame part Cell frame by insertion and inward bending of the tab is formed fixed to each other. Furthermore, it is also possible to rivet or welded adjacent frame parts.

A disadvantage of these variants is that the frame parts of adjacent cell frames are not flush with each other. Through the connection of tabs and recesses, by rivets or by welding points, a narrow gap can always remain, in which dust or bacteria can accumulate. As a result, such a filter does not meet the specific hygiene regulations which must be complied with in certain application locations of the filter, for example in an operating room. In order to avoid this problem, the connection areas of adjacent cell frames are previously sealed with sealant consuming, with hygiene devices in relation to the air flow in the flow channel even on both sides. This caulking is time consuming and incurs additional manufacturing costs.

An additional disadvantage of such filters is the unstable statics in the flow channel. To improve the statics, a support plate is attached to adjoining frame parts in order to apply the required statics. However, this also requires another step and additional material costs occur.

In addition, the utility model will continue to be used DE 86 26 425 U1 and the utility model DE 87 10 286 U1 directed.

The publication DE 86 26 425 U1 shows a filter frame for loading with air filter cells, consisting of a plurality of mounting pieces and the mounting pieces connecting profile sections, each profile section is formed essentially of a longitudinal box section on the at least one side, a support of the air filter cells forming flange is formed. Here, the box profile of the profile sections at least one web-like inner wall and the front side of each of the connecting arms of the mounting pieces is provided in the region of the continued outer profile of the profile sections with an at least partially covering the cavity of the box profile end wall. Furthermore, the connecting means are formed as the end wall of the connecting arms of the mounting pieces engaging behind and in the web-like inner wall of the box sections resistive tension elements.

The publication DE 87 10 286 U1 shows a filter wall / ceiling for clean room facilities, with filter cells inserted into a framework composed of carrier profiles, each of the filter cells is provided with a circumferential filter cell frame, wherein the filter cell frames are formed from side profile sections having trough-shaped recesses for receiving the filter pack and the both sides the trough-shaped depressions are provided with extensions, of which the dichtmittelseitige profile extension with the associated sealing flange of the corresponding carrier profile and the Spannmittelseitige profile extension cooperate with the clamping means and further the supernatant of the dichtmittelseitigen profile extension is at most equal to the thickness of the formed as a circumferential sealing profile sealant, and the outer Projection of the sealing flange at least the depth of the circumferential trough-shaped depression corresponds.

Also in these filter walls mentioned above, there is the problem that the frame parts of adjacent cell frames are not flush with each other.

It is therefore an object of the invention to describe an improved filter wall.

This object is solved by the features of the independent claim. Advantageous developments of the invention are the subject of the subordinate claims.

The inventors have realized that it is possible to design a filter for ventilation and air conditioning systems in buildings from individual frame segments, in which the individual frame segments not riveted to each other, welded or connected with tabs. Thereby, the formation of gaps between adjacent frame parts of the frame segments, in which dust and bacteria can accumulate, can be avoided without the need for a costly sealing with additional sealant. In each frame segment is a filter insert, which is fixed by special fasteners.

For this purpose, the outer frame of several, preferably arranged at right angles, crossing cross members is divided into a plurality, also preferably rectangular frame segments, wherein the outer frame also consists of, preferably arranged at right angles to each other, side panels. The cross struts have a T-shaped cross-section with a first and a second T-leg, wherein the first T-leg are oriented transversely to the air flow and the second T-leg parallel to the air flow. The cross struts are multiply folded and / or folded several times, wherein the first T-legs of the cross struts have at their crossing areas one position less and the second T-legs are at least double-layered.

Furthermore, the cross struts have a plug-in system, with which they can be inserted into each other, preferably at right angles. At the intersection of the transverse struts is located in a transverse strut or in two transverse struts a slot into which the other cross strut can be inserted flush. In the case of two-ply transverse struts, exactly the same number of plies are again present at the crossing regions after mating, ie two, as in the remaining regions of the short T-limbs, since here each cross strut has one layer less, ie only one. As a result, the first T-legs over the entire surface of the filter form a plane. In addition, the crossing areas of the transverse struts can be fixed by means of connecting elements and thus the right angles are stabilized. This connecting element can be realized for example by a folded cross plate, by spot welds or a rivet. To seal the joints of the cross plates and the crossing areas between the components can additionally be applied a sealing adhesive.

The four side parts of the outer frame are also multiply folded in the same way and / or folded and have an L-shaped cross-section, wherein the first L-legs are in the plane of the first T-leg and the second L and T Legs in the same direction, ie in the flow channel forward, are oriented. The trained by the first L and T-legs level is consistently without column, with the exception, of course, the clearances between the cross braces and side panels for the filter cartridges. At their ends, the four side parts kinking, so umbiegbare tabs, on, with which they can be connected. For connecting the transverse struts with the side parts, these are held together by means of a combination of tabs at the ends of the cross struts and recesses at the corresponding positions in the side parts. For this purpose, these fastening tabs are simply pushed through the corresponding recesses and bent.

In principle, it is favorable if both the first T-legs and the first L-legs are shorter than the second T- or L-legs, so as to keep the flow resistance of the filter in the air duct as low as possible. In the context of the invention, however, it is also possible to make either all the T and L legs the same length or even to make the second T and L legs shorter than the first T and L legs.

Due to the complex bends of the T and L profile and the plug-in system, there are no spaces between adjacent frame segments that would have to be manually sealed. Open edges are positioned so that they are automatically closed when applying a sealant, such as a PUR foam seal (PUR = polyurethane), for sealing the filter cartridges.

Furthermore, the filter is replaced by the plug-in system a very stable statics in its entire size, since it does not consist of individual interconnected segments, but the frame segments are virtually all interconnected via the continuous cross struts.

According to this basic idea, the inventors propose to improve a filter for ventilation and air conditioning systems in buildings, comprising an outer frame which is divided into at least two frame segments, in that a frame segment is formed by at least two T-shaped transverse struts, wherein the at least two transverse struts are made in one piece from a multiply folded and / or folded sheet metal and are arranged crosswise, the at least two cross struts are designed to be nestable at their intersections, at each crossing region at least one of the intersecting cross struts has a slot into which the other cross strut can be inserted flush, and the intersecting transverse struts in the overlapping crossing region each have at least one layer less, wherein furthermore for fixing two cross struts a connecting element is provided.

A preferred embodiment of the filter wall provides that the outer frame is rectangular. Furthermore, a preferred embodiment provides that the at least two frame segments are formed at right angles. The at least two transverse struts are arranged at right angles in a likewise preferred embodiment. In a further preferred embodiment, the at least two transverse struts are embodied at right angles to one another at their intersection regions.

In an advantageous embodiment of the filter wall according to the invention, the T-shaped cross sections of the transverse struts are aligned uniformly. In this case, the cross struts each have a first T-leg and a second T-leg, wherein the first T-legs form a plane and the second T-legs are aligned parallel to each other and oriented in the same direction.

In this case, it is furthermore advantageous if in each case the second T-leg of a transverse strut is at least double-layered and the first T-leg of a transverse strut, with the exception of the crossing regions, is at least double-sided at the edge, so that the sum of the superimposed plies exceeds the number of plies outside corresponds to the crossing area. In a particularly advantageous embodiment of the filter wall according to the invention, the second T-legs of the transverse struts are double-layered and the first T-legs of the transverse struts, with the exception of the crossing regions, are designed to be double-layered at least on the edge. This ensures that the gaps do not create any open gaps. In this case, the crossing regions would then be single-layered on the first T-legs, so that the first T-legs are again double-layered everywhere through the assembly of the transverse struts and thus form a plane. An advantage of this flat surface is, for example, that there are no elevations on the side of the filter facing the air flow, on which dust particles could get caught.

The only offset on the front of the filter is due to the fasteners. These can advantageously be arranged at the crossing regions of two transverse struts on the first T-legs of the crossing transverse struts. In this case, a connecting element may for example be a folded cross plate. In this variant, it is possible to manufacture the cross plates of very thin material and flush mounted on the crossbars, so that this offset is very small and negligible. In addition, the connection of the cross plates to the crossing cross struts can be further sealed by applying a sealing adhesive on the cross struts, which is pressed outwards during attachment of the cross plate and thus seals possible clearances.

Furthermore, it is also possible to carry out at least one spot weld or at least one rivet as a connecting element.

In a further advantageous embodiment of the filter wall according to the invention, the outer frame may consist of four multi-layered side parts, which are also made of the same way as the crossbars repeatedly folded and / or folded sheet metal. In this case, each side part can have an L-shaped cross section with a first L-leg and a second L-leg. The first L-legs are preferably in the plane of the first T-legs of the transverse struts and point into the interior of the outer frame, ie to the frame segments, while the second L-legs parallel in the same direction as the second T-legs of the crossbars are aligned. In this case, it makes sense if the number of layers of the side parts corresponds to the number of layers of the transverse struts at least at the first L and T thighs. As a result, a production of a uniform material is possible and the design of the plane of the first L and T-legs is simplified.

To connect the four side panels, they can be made to fit together. For example, this can be done with the help of umbiegbaren attachment tabs at the ends of the side parts, which are bent during assembly around the side parts to be joined. This creates a stable outer frame. It is possible to provide in each case two side parts to be joined only one side part with fastening tabs that can be bent around the other side part, or to provide both sides with mutually attached mounting straps, between each of which there is a free space in which a fastening tab of the other side panel can be bent.

A similar connection can advantageously be made possible between the transverse struts and the outer frame, in that the cross struts likewise have attachment tabs at their ends, which can be pushed into recesses in the side parts and then bent over. In addition, the cross braces may still have another fastening tab, which is not guided by a recess, but is bent from below around the lower edge of the side part. These connections stabilize the outer frame and, together with the plug-in system, enable rectangular stable frame segments.

Advantageously, one, in particular rectangular, filter insert is located in the individual frame segments. It is useful, for example, in terms of the functionality of the filter and the simple attachment of the filter inserts when the surface of a filter insert corresponds to that of the respective frame segment.

To attach the filter cartridges in the frame segments, brackets can be mounted in each frame segment, these brackets preferably in the corners, ie in the crossing region of the cross braces and or the side parts of the second T and L legs are arranged.

To attach these brackets, at least one clip tab may be provided on a second T and / or L-leg, and at least two clip eyelets may be provided on the other second T and / or L-leg. The filter insert can then be clamped with the corners of its filter frame between the brackets and the first T and / or L-leg and thus secured against slipping out. Furthermore, the clip can be additionally prevented from slipping out by a locking device, for example a bendable pin. In order to adapt this fastening device, consisting of staple tab and eyelets to different filter cartridges with possibly different thickness filter frame, it is advantageous to attach at least two superimposed rows of staple tabs and eyelets, as well as the pin. Advantageously, the clip tabs and loops and the pins are formed and punched from an outer layer of the multilayer cross member. The punching takes place preferably already on the later to the T or L profile to be edged sheet. In this way it can be achieved that in the areas of the punched out on the legs of the T- or L-profile closed, ie without through openings, remains.

In addition, at least on the first T and / or L legs, a sealing compound may be provided to seal the filter insert in a frame segment, which seals the bearing surface of the filter insert. This sealant may be, for example, a polyurethane foam seal (= PUR), which is sprayed on during the manufacturing process. Also glued rubber seals, such as sponge rubber, or plugged profile or hollow chamber seals are advantageously used here. In order to position the filter insert in each case in the middle of the frame segment, at least two of the surrounding long T and L legs, preferably two adjacent second T and / or L legs, can each have at least one shape elevation. With the help of these Formerhebungen the filter element can be moved parallel to the plane of the first L and T-legs and adjusted.

Advantageously, the filter cartridge is a pocket filter or a cartridge filter. Above all, these filter cartridges have a large attack surface for the incoming air, whereby the separation efficiency of the filter is positively influenced and a large volume of dust storage is available.

Of course, in the context of the invention, transverse struts made of three or four layers of folded and folded sheet metal are also possible, the sum of the positions of the intersecting transverse struts corresponding to the number of layers of the second T-side of a transverse strut at the crossing regions.

In the following the invention will be described in more detail by means of a preferred embodiment with the aid of the figures, wherein it is pointed out that only the elements essential for the immediate understanding of the invention are shown.

They show in detail:

1 : Exploded view of a filter wall;

2 : Partially composite filter wall;

3 : Detail A off 2 ;

4 : Bottom view of the 3 ;

5 : Detail B off 2 ;

6 : Detail C off 2 ;

7 Partially assembled filter wall with filter cartridges;

8th : Detail D off 7 ;

9 : Front view of a filter wall according to the invention with filter cartridges;

10 : Rear view of a filter wall according to the invention with filter cartridges;

11 : Detail E off 10 ;

12 : Cut FF from the 10 ;

13 : Detail G from the 12 ;

14 : First longitudinal section through a crossbar;

15 : Second longitudinal section through a crossbar.

The 1 shows an exploded view of a filter according to the invention, wherein only the cross struts 2 , the four side parts 1 of the outer frame and the cross plates 3 are shown. In this exemplary case, the rectangular outer frame of the six cross struts 2 , which are arranged at right angles to each other - three vertically and three horizontally - divided into 16 equal rectangular rectangular frame segments. Outwardly, the respective frame segments of the side panels 1 limited.

The cross struts 2 are connected to each other via a plug-in system. In addition, in the assembled state, the crossing areas with cross plates 3 strengthened. The cross plates 3 are located in the flow channel on the front, so the incoming air side facing, and are glued and sealed by an additional non-visible sealing adhesive with the crossing areas.

The 2 shows the front of a partially assembled filter. Here are also only the side panels, the cross struts 2 and a cross plate 3 pictured, with only four cross struts here 2 available. These are arranged to divide the outer frame into eight rectangular frame segments - four larger ones and four smaller ones. Three cross struts are arranged at right angles to the fourth cross strut.

At the three crossing areas of the transverse struts the different assembly stages are illustrated. At the right intersection - marked with detail A - are the cross struts 2 not yet put together. In the already assembled cross struts 2 the middle intersection - marked with detail B - form the first T-legs of the cross braces 2 a level. This is achieved in that in the crossing region, the first T-legs have one layer less than usual. In order to additionally stabilize the crossings of the cross braces, is a cross plate 3 attached to the crossing area. This is shown at the left intersection - marked with detail C -.

The cross struts have at their ends a plurality of fastening tabs which can be introduced for fixing these components on the outer frame in recesses in the side panels and then bent. This is in the 8th shown. Similarly, the side panels can be interconnected.

In the 3 is the detail A from the 2 shown greatly enlarged. In this illustration, the two slots 4 of the plug-in system in the second T-legs 2.2 of the components, as well as the crossing area 14 , one sheet of sheet metal less than the remaining first T-legs 2.1 has, easy to recognize. In the case of two-ply cross struts, this is done in the intersection area 14 at the upper cross strut, the lower layer at the first T-leg 2.1 and in the lower transverse strut, the upper layer on the first T-leg 2.1 spared. After the mating of the cross struts is the crossing area 14 thus again two-ply and the first T-thighs 2.1 form a plane over the entire surface of the filter. In the upper cross strut is the slot 4 the plug system in the lower half of the second T-leg 2.2 and in the lower cross strut is the slot 4 in the upper half. So can the upper cross strut in the slot 4 the lower cross strut are positioned and vice versa.

The 4 shows the cross struts from the 3 again from below. A description of the eyelets to be seen 5 , Staple tabs 6 and formations 13 on the second T-thighs 2.2 the cross struts take place in the 5 and 6 , Furthermore, the crossing areas 14 , So to see the areas of the first T-leg of the cross struts, in which one position is less.

The right angle mated cross struts - Detail B from the 2 - are in the 5 shown. The transverse struts can be folded in such a way that open gaps between the individual frame segments in the flow channel are avoided. Otherwise, they would have to be laboriously sealed in order to prevent accumulation of dirt. In this enlarged view is also good to see that the first T-leg 2.1 the cross struts form a plane.

At the second T-thighs 2.2 the cross braces are arranged in two rows one above the other, each two eyelets 5 and a staple tab 6 , In them, a clip, which is used for attaching the filter cartridges in the frame segments, be fixed. They are located in each crossing area of the transverse struts, as well as at the connection points of the cross struts with the side parts of the outer frame.

The 6 shows in detail C according to the 2 two ready-made cross braces with attached bracket 7 and mounted cross plate 3 , The cross plate 3 For example, to attach to the intersection of the cross braces to the Edges of the first T-legs of the cross struts are at least partially bent around or riveted to the cross struts. In this variant, the inner corners of the cross plate 3 about the first T-legs tilted - reference numerals 15 , Above all, it is important that the cross plate 3 is as thin as possible and a possible positive conclusion without too strong elevations is made to the cross braces, so that in the flow channel existing dirt particles as possible can not get caught and the transitions of the cross braces are covered.

In the two clamp eyes 5 and the clip tab 6 The upper row has a curved bracket 7 , It is used to fix the filter element. Your one end - here on the right - is starting from the middle of the crossing through both grommets 5 pushed, bent back to the intersection and in a further pointing away from the intersection bow to staple tab 6 led on the left side. The left end of the bracket 7 is also bent around. The filter insert to be fastened can then be placed between the middle arch of the clamp 7 and the first T-legs of the cross struts are clamped. To lock the clamp 7 can a pin 17 who is next to the grommets 5 is located after the insertion of the clip 7 , be bent out, leaving the bracket 7 is additionally secured. In this illustration is the pin 17 not yet bent out. With the two rows arranged one above the other, this possibility of attachment can be adapted to filters of different thicknesses.

In the 7 is the ready assembled outer frame with several cross struts according to the 2 together with several filter cartridges 8th to see, with a filter cartridge for each frame segment 8th is provided. For the filter inserts shown here 8th are so-called cassette filters. In the upper part are the cassettes, so the actual filter unit, are collected in the dirt particles on the side facing away from the flow, and in the lower part of this filter has a filter frame 9 , For attachment, the filter frame 9 be clamped at each of four corners between a bracket and the first T-legs of the cross braces.

The connection of the side parts with the cross braces via fastening straps 12 and recesses 11 , This is in detail D in the 8th shown greatly enlarged. At the end of the crossbar 2 There are several fastening straps 12 passing through recesses 11 in the second L-leg 1.2 pushed the side part and then be bent. In addition, the cross strut has a fastening strap 12.1 on, from below around the lower edge of the second L-leg 1.2 of the side part is bent around. Thus, a simple to manufacture and stable connection of these components is possible, which is stabilized mainly by the totality of the cross members connected to the side panels.

The 9 and 10 show a front view 9 - and a rear view 10 - The filter wall according to the invention. The frame segments 10 have due to the arrangement of perpendicularly interconnected cross braces on two different sizes. Only half of the frame segments 10 is equipped with a filter insert. On the front view are still the cross plates 3 to see.

The front of the cassette filter cartridges in the 9 shows the cassettes, while from behind the edge of the filter insert still the filter frame 9 is to recognize. In the lower right frame segment, the brackets are already attached in the corners. The corners of the filter frame 9 be clamped between the curved brackets and the first T-legs of the cross braces and the first L-leg of the side panels.

The back of such a jammed corner of a filter frame 9 is in the 11 as an enlarged detail E of 10 to see. The clip 7 is in the grommets 5 and the clip tab 6 fixed. In its middle, it is shaped in opposite directions to the crossing region of the transverse struts, so that the bearing surface of the filter frame 9 on the bracket 7 gets bigger. To seal the filter frame in addition to the first T or L legs, a sealant can be applied to the first pages. This is not visible on the front side.

The 12 shows a section FF through the back of the filter with filter cartridge 8th according to the 10 , The filter frame 9 is according to the 10 clamped and fixed between the bracket and the first T or L-leg. On the side part shown here are three Formerhebungen 13 - The right is not visible behind the filter element 8th , They serve to center the filter cartridge 8th within the filter segment.

At the bottom of the drawing is the sealant 16 See, for example, a foam gasket made of polyurethane. It is sprayed onto the second T-side of the cross brace during manufacture.

In the 13 is again a corner of the filter cartridge 8th shown enlarged - detail G according to the 12 , You can see the filter frame 9 that under the bracket 7 is stuck. In the lower part of the drawing is the sealant 16 for sealing the filter frame indicated.

The 14 and 15 each show a section through a two-ply transverse strut parallel to a slot with upwardly pointing second T-leg 2.2 , In the 14 is the line of sight to the eyelets 5 and in the 15 to the staple tabs 6 , The clamp eyes 5 and clip tabs 6 are used to fix the clip with which a filter element can be attached in each frame segment. The pins for locking the clip are not bent out here and thus not visible. These details, so clip tabs 6 , Clamp eyes 5 and tenons, may be from the outer layer of the two-ply second T-leg 2.2 the cross strut are shaped and or punched.

Both the first and second T-legs 2.1 and 2.2 here are double-layered, except for a small area on the first T-leg 2.1 on the side facing away from the air flow. Due to the special bends of the cross braces is located on the front, so the first T-leg 2.1 , no gap in which dirt particles or bacteria contained in the air flow can penetrate.

Both figures are located at the end of the transverse strut oriented towards the plane of the drawing on the second T-leg 2.2 alternately two bent fastening straps on both sides 12 , In addition, there is an upwardly bendable fastening strap at the lower end 12.1 , To attach the crossbar to a side panel, they can be pushed through recesses in this side part and then bent.

A filter wall with such cross braces, which form the individual frame segments, has no open spaces in the air flow, which would have to be sealed. This saves material and time and thus the hygiene requirements can be met.

It is understood that the abovementioned features of the invention can be used not only in the respectively specified combination but also in other combinations or in isolation, without departing from the scope of the invention.

LIST OF REFERENCE NUMBERS

1

side panel

1.1

first L-leg of a side part

1.2

second L-leg of a side part

2

crossmember

2.1

first T-leg of a cross brace

2.2

second T-leg of a cross brace

3

cross sheet

4

slot

5

Klammeröse

6

clip strap

7

clip

8th

filter cartridge

9

filter frame

10

frame segment

11

recess

12

mounting tab

12.1

lower fastening strap

13

form survey

14

crossing area

15

Tilts of the cross plate

16

sealant

17

spigot

Claims (36)

Filter wall for ventilation and air conditioning systems in buildings, comprising: 1.1. an outer frame formed in at least two frame segments ( 10 ), characterized in that 1.2. a frame segment ( 10 ) by at least two T-shaped transverse struts ( 2 ), 1.3. the at least two transverse struts ( 2 ) are made in one piece from a multiply folded and / or folded sheet metal and are arranged crosswise, 1.4. the at least two transverse struts ( 2 ) at their intersections ( 14 ) are designed to fit into one another, 1.5. at each intersection ( 14 ) at least one of the intersecting transverse struts ( 2 ) a slot ( 4 ), in which the other transverse strut ( 2 ) can be inserted flush, and 1.6. the crossing cross struts ( 2 ) in the overlapping intersection area ( 14 ) each have at least one layer less, further 1.7. for fixing two transverse struts ( 2 ) A connecting element is provided. Filter wall according to the preceding claim 1, characterized in that the outer frame is rectangular. Filter wall according to one of the preceding claims 1 to 2, characterized in that the at least two frame segments ( 10 ) are formed at right angles. Filter wall according to one of the preceding claims 1 to 3, characterized in that the at least two transverse struts ( 2 ) are arranged at right angles. Filter wall according to one of the preceding claims 1 to 4, characterized in that the at least two transverse struts ( 2 ) at their intersections ( 14 ) are designed at right angles nestable. Filter wall according to one of the preceding claims 1 to 4, characterized in that the T-shaped transverse struts each have a uniformly arranged first T-leg ( 2.1 ) and a uniformly arranged second T-leg ( 2.2 ), wherein the first T-legs ( 2.1 ) form a plane. Filter wall according to the preceding claim 6, characterized in that the second T-leg ( 2.2 ) a cross strut ( 2 ) at least two layers and the first T-leg ( 2.1 ) a cross strut ( 2 ) with the exception of the crossing areas ( 14 ) is carried out at least on the edge side at least two layers, so that the sum of the superimposed layers of the number of layers outside the crossing region ( 14 ) corresponds. Filter wall according to one of the preceding claims 1 to 7, characterized in that the second T-legs ( 2.2 ) of the transverse struts ( 2 ) two-ply and the first T-legs ( 2.1 ) of the transverse struts ( 2 ) with the exception of the crossing areas ( 14 ) are executed at least on the edge of two layers. Filter wall according to one of the preceding claims 1 to 8, characterized in that the connecting element at the crossing areas ( 14 ) of two transverse struts ( 2 ) on the first T-legs ( 2.1 ) of the crossing cross struts ( 2 ) is provided. Filter wall according to one of the preceding claims 1 to 9, characterized in that the connecting element is a folded cross plate ( 3 ). Filter wall according to the preceding claim 10, characterized in that between the cross plate ( 3 ) and the first T-legs ( 2.1 ) of the transverse struts ( 2 ) A sealing adhesive is provided. Filter wall according to one of the preceding claims 1 to 11, characterized in that the connecting element is at least one spot weld. Filter wall according to one of the preceding claims 1 to 11, characterized in that the connecting element is at least one rivet. Filter wall according to one of the preceding claims 1 to 13, characterized in that the outer frame of four side parts ( 1 ) is made of multi-folded and / or folded sheet metal. Filter wall according to the preceding claim 14, characterized in that each side part ( 1 ) of the outer frame has an L-shaped cross-section with a first L-leg ( 1.1 ) and a second L-leg ( 1.2 ), wherein the first L-limbs ( 1.1 ) in the plane of the first T-legs ( 2.1 ) of the transverse struts ( 2 ) and into the interior of the outer frame and the second L-legs ( 1.2 ) parallel to the second T-legs ( 2.2 ) of the transverse struts ( 2 ) are aligned. Filter wall according to the preceding claim 15, characterized in that the four side parts ( 1 ) of the outer frame are designed to be plugged together. Filter wall according to the preceding claim 16, characterized in that the four side parts ( 1 ) of the outer frame at least at one end bendable fastening tabs ( 12 ) exhibit. Filter wall according to one of the preceding claims 1 to 17, characterized in that the transverse struts ( 2 ) on the outer frame by a combination of bendable fastening tabs ( 12 ) and outer frame-side recesses ( 11 ) are designed fixable. Filter wall according to one of the preceding claims 1 to 18, characterized in that in the frame segments ( 10 ) one, in particular rectangular, filter insert ( 8th ) is provided. Filter wall according to the preceding claim 19, characterized in that for fastening the filter insert ( 8th ) in a frame segment ( 10 ) Brackets ( 7 ) are provided. Filter wall according to the preceding claim 20, characterized in that these brackets ( 7 ) at the second T and L legs ( 2.2 . 1.2 ) in the intersection areas ( 14 ) are arranged. Filter wall according to the preceding claim 21, characterized in that for fastening the brackets ( 7 ) in the intersection areas ( 14 ) on a second T or L leg ( 2.2 . 1.2 ) at least one staple tab ( 6 ) and in each case on the other second T or L leg ( 2.2 . 1.2 ) at least two clips ( 5 ) are provided. Filter wall according to one of the preceding claims 21 and 22, characterized in that for locking the brackets ( 7 ) A locking device is provided. Filter wall according to the preceding claim 23, characterized in that this locking device at least one bendable pin ( 17 ). Filter wall according to one of the preceding claims 22 and 24, characterized in that the at least two clip eyes ( 5 ), which has at least one clip tab ( 6 ) and the at least one pin ( 17 ) from an outer layer of a multi-layered second T-leg ( 2.2 ) a cross strut ( 2 ) are shaped and or punched. Filter wall according to one of the preceding claims 19 to 25, characterized in that for sealing the filter cartridge ( 8th ) at least at the first T and L legs ( 2.1 . 1.1 ) a sealant ( 16 ) is provided. Filter wall according to the preceding claim 26, characterized in that the sealing compound ( 16 ) is a foam seal, preferably made of polyurethane. Filter wall according to the preceding claim 27, characterized in that the foam seal is sprayed in the manufacturing process. Filter wall according to the preceding claim 26, characterized in that the sealing compound ( 16 ) is a rubber seal, preferably a foam rubber seal, is. Filter wall according to the preceding claim 29, characterized in that the rubber seal is adhered in the manufacturing process. Filter wall according to the preceding claim 29, characterized in that the sealing compound ( 16 ) is a profile or hollow chamber seal. Filter wall according to the preceding claim 31, characterized in that the profile or hollow chamber seal is plugged in the manufacturing process. Filter wall according to one of the preceding claims 18 to 32, characterized in that for centering the filter insert ( 8th ) within the frame segment on at least two of the surrounding long T and L legs ( 2.2 . 1.2 ) at least one shape survey ( 13 ) is provided. Filter wall according to one of the preceding claims 18 to 33, characterized in that the filter cartridge ( 8th ) is a pocket filter. Filter wall according to one of the preceding claims 18 to 33, characterized in that the filter cartridge ( 8th ) is a cassette filter. Filter wall according to one of the preceding claims 6 to 35, characterized in that the second T-legs ( 2.2 ) of the transverse struts ( 2 ) three-layered or four-layered and the first T-legs ( 2.1 ) of the transverse struts ( 2 ) with the exception of the crossing areas ( 14 ) are three-layered or four-layered.

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