Filter module

Abstract

The present invention relates to a filter module for separating particles from contaminated air, comprising a receiving element which has an inlet side for the inlet of an air flow to be cleaned and an outlet side for the outlet of the cleaned air flow, wherein the inlet side and the outlet side are arranged opposite one another on the receiving element, at least one filter insert which is received in the receiving element, wherein the filter insert has at least one transverse wall with at least one opening, wherein at least one air guide element is arranged at the opening and is inclined with respect to a plane of the transverse wall such that the air flow can be deflected from the inlet side towards the outlet side by the air guide element. The invention further relates to a method for producing a transverse wall for a filter module.

Description

FIELD OF THE INVENTIONThe present invention relates to a filter module for separating particles from contaminated air. The invention further relates to a method for producing a transverse wall for a filter module.BACKGROUND ARTFilter modules are used for different applications. For example, these can be used in the area of spray booths for absorbing paint mist. The filter modules serve to clean the air discharged from the spray booth. The paint particles which do not adhere to an object to be sprayed can be separated by the filter modules. Accordingly, filter modules of this type can likewise be referred to as separators or separator modules.Usually, filter modules have an inlet side which is designed for the entry of an air stream to be cleaned. On an opposite side, an outlet side is preferably arranged, which serves for the outlet of the cleaned air flow.For example, a plurality of similar filter modules can be arranged next to one another or one on top of the other, so that a coherent surface is produced, which can be arranged, for example, below or also laterally next to the object to be sprayed. In this case, all the entry sides are arranged on one side of the contiguous surface. Preferably, a negative pressure is generated behind the filter modules so to speak, so that an air flow is produced through the filter modules, which flows from the inlet side in the direction of the outlet side. The air to be cleaned is guided through the filter modules and cleaned by the air flow in that the particles adhere within the filter modules or are separated on the filter modules.Filter modules are known from the prior art, which are formed from a paper stock. At least two walls are arranged within the filter module, which are arranged transversely to the direction of the incoming air flow. The walls each have openings, wherein the openings of the walls become smaller from the inlet side towards the outlet side and / or can be arranged offset with respect to one another. The walls form chambers within the base body. The air stream to be cleaned is guided in meandering fashion through the differently arranged openings in the walls arranged one behind the other.It is also possible to connect the walls to one another via a stabilizing wall oriented transversely thereto. A plurality of such cleaning structures can be arranged one behind the other within the hollow body and thus form the filter module. Through the openings in the walls and in the stabilizing wall, the air to be purified is guided in meandering fashion alternately through the walls and through the stabilizing walls through the filter module.A disadvantage of such filter modules is that the adhesions of the particles within the filter module are very different, i.e. unequally distributed. This results from the meandering guidance of the air flow, wherein the air flow is redirected in different spatial directions after entry on the entry side into openings. As a result of this pure diversion of the air flow, for example to the left, right, top or bottom inside the filter module, abrupt and very strong deceleration takes place, as a result of which the air flow increasingly loses speed. In a first chamber between a first and a second wall, which the air flow to be cleaned first reaches, most particles are consequently separated. Chambers arranged further behind are only reached by a few particles. In addition, an increased energy requirement is required in order to maintain the air flow in the rear chambers at a required and effective speed as well. The efficiency and service life of each filter module are thereby reduced. The filter modules often have to be replaced already if regions arranged further back within the filter module have only very small particle accumulations.It is likewise known from the prior art to individually remove individual cleaning structures which are arranged one behind the other within the base body. As a result, the cleaning structure, which is arranged closest to the inlet side, can be exchanged.During operation in a jump cabin, wherein usually a plurality of identically constructed filter modules are arranged next to one another or on top of one another to form a coherent surface, the exchange of individual cleaning structures from each individual filter module is possible only with great time expenditure, however. In particular, each individual hollow body must be opened for the exchange of a cleaning structure from each individual filter module. This is not possible with filter modules arranged next to one another and on top of one another. Accordingly, the contiguous surface of filter modules would have to be disassembled first, so that each individual filter module is accessible. This results in enormous time expenditure. In practice, therefore, the exchange of individual cleaning elements is hardly possible. Consequently, experience has shown that the filter modules are already completely replaced when only the first cleaning element is contaminated in such a way that the air flow can no longer flow through this one cleaning element.With regard to the prior art, reference can be made to CN 111714992 A, CN 114082257 A, CN 209060752 U, CN 210332061 U, CN 217472978 U and CN 105848751 A, which show different technological backgrounds on paint mist filters.SUMMARY OF THE INVENTIONAgainst this background, the object of the present invention is to specify an improved filter module which has an improved service life. In particular, it is the object of the invention to provide a filter module with a better separation behavior, wherein a lower energy requirement is required for operation.According to the invention, this object is achieved by a filter module having the features of claim 1.Accordingly, the following is provided:A filter module for separating particles from contaminated air, in particular for separating colour particles from an air flow, comprising a receiving element which has an inlet side for the inlet of an air flow to be cleaned and an outlet side for the outlet of the cleaned air flow, wherein the inlet side and the outlet side are arranged opposite the receiving element, at least one filter insert which is received in the receiving element, wherein the filter insert has at least one transverse wall with at least one opening, wherein at least one air guiding element is arranged on the opening, which air guiding element is arranged inclined with respect to a plane of the transverse wall, so that the air flow can be deflected from the inlet side in the direction of the outlet side by the air guiding element.The invention further relates to a method for producing a transverse wall for a filter module, wherein the transverse wall and the air guiding element are formed in one piece, wherein the inclination of the air guiding element relative to the transverse wall is formed by a pressing method, wherein in particular the air guiding element is fixed immovably at a predetermined angle with respect to the plane of the transverse wall by a stiffening adhesive material.The finding on which the present invention is based consists in the fact that a long-lived and effective filter module can be formed by uniform distribution of the particles between the inlet side and the outlet side.The idea underlying the present invention is to accelerate the air flow within the filter module in order to enable a balanced adhesion of the particles to all transverse walls within the receiving element and at the same time to save energy when generating the air flow. The concept is implemented with at least one air guiding element, wherein the air flow flows through the air guiding element, guided at least in sections, in the direction of the outlet side. A surface of the air guiding element oriented obliquely to the flow direction can guide the air flow instead of simply deflecting it. The air flow can, for example, sweep over the surface of the air guiding element, wherein, as a result of the orientation at an angle to a connecting plane between the inlet side and the outlet side, an acceleration of the air flow can take place, since the flow behind the opening is virtually constricted, as a result of which the air flow accelerates in accordance with the Venturi principle.Furthermore, it is advantageously possible in this way to form an air duct in any direction relative to the plane of the transverse wall without using a longitudinal wall and without connecting adjacent transverse walls to one another. In other words, a flow area behind and / or in front of the opening can be influenced. Because the air guiding element is arranged inclined with respect to the plane of the transverse wall, in particular at an angle not equal to 90° with respect to the transverse wall, a deflection of the air flow can take place directly before and / or directly after the opening.Advantageously, the at least one air guiding element is inclined with respect to the plane of the transverse wall and with respect to a plane angled at 90° thereto. Accordingly, the air guiding element runs in particular obliquely and can enable an air line in any direction within the filter element. In particular, the air guiding element can be inclined at an angle between 20° and 80° with respect to the mentioned planes.Advantageously, the air guiding element is designed as a type of wing element which touches or contacts the transverse wall but is not connected to any further element.An inclined arrangement of the air guiding element enables, in particular, the air flow to be accelerated in a targeted manner, such that a sufficient speed for an optimized separation behavior can be achieved within the filter insert. Thus, the air guiding element can have a free side edge which forms a tear-off edge for the air flow. Droplets of the deposited particles can form at the separation edge. The separation edge can facilitate a drip behavior of particles separated therefrom, so that the service life of the filter module can be extended. In particular, separated particles can drip down, wherein the filter insert is saturated less quickly by particles. In particular in comparison with embodiments from the prior art in which the transverse walls are connected to longitudinal walls, an extension of the service life and an improvement of the separation behavior of more than 100% can thereby be achieved. Droplet formation of this type is not possible with the known filter modules, since these do not have any free separation edges within the filter module.A transverse wall is to be understood as an element which is arranged transversely to the air flow within the receiving element. Because the free air flow through the opening is partially influenced by the air guiding element, so that the air flow is deflected from the inlet side in the direction of the outlet side before and / or after the opening, an air flow can be formed which can be deflected and accelerated as desired. The air is consequently not simply guided through openings, but rather guided along the air guiding element in a targeted manner behind or in front of the opening. The air guiding element can therefore be understood as a type of guide flap, by means of which the air flow is directed along in a targeted manner after or before the opening. In particular, the flow behavior can be specifically influenced by the opening, wherein the air flow can be specifically accelerated.An opening is to be understood as a recess within the transverse wall. The opening may have any shapes. In particular, the opening is rectangular or square.In addition, such a filter module has a single filter insert which does not have to be exchanged over the complete service life of the filter module, wherein all elements of the filter insert can be used until unusable, i.e. until blocked by separated particles.In particular, the separation behavior can be improved by more than 100% compared to known filter modules. This can be implemented in particular in that the air guiding element carries out a specific diversion and guidance of the air flow after passing through the opening, so that the air flow within the filter insert is accelerated by the combination of the opening with the at least one air guiding element. Therefore, the service life and the separation behavior can be increased by at least 100% compared to filter modules from the prior art. In particular, energy can be saved, which is used in the prior art for forming the air flow. The saving in energy is at least 30% compared to filter modules from the prior art.Since, in particular, the separation behavior can be improved by more than 100%, wet lacquers can drain down. The filter module can reach a high fill level and become heavy. In order in particular to avoid an overflow of the filter module, a kind of collecting trough or trough can be arranged under the filter module or under the filter insert. This can be formed from the same material as the filter module, in particular from a cardboard material, preferably with a coating which is wet-resistant on one side. This can prevent the filter module from overflowing and the installation from becoming dirty if the wet lacquers are collected in the collecting trough or trough.Advantageous embodiments and refinements emerge from the further dependent claims and from the description with reference to the figures of the drawing.According to an advantageous embodiment, two air guiding elements can be arranged on the at least one transverse wall, so that a flow opening is formed which is offset with respect to the opening in the transverse wall, and the air flow can flow through the flow opening. The flow opening is preferably formed between the two air guiding elements, wherein a respective side edge of each air guiding element can preferably form a lateral delimitation of the flow opening. Offset means in particular that the flow opening is arranged offset, in particular with respect to a plane of the transverse wall, so that a type of nozzle can be formed, by means of which the air flow is constricted and accelerated. In particular, the flow opening is arranged offset with respect to the transverse wall. An acceleration can be effected according to the Venturi principle. The flow opening is preferably closer to the outlet side than the opening in the transverse wall, so that the air flow is accelerated in the direction of the outlet side. In particular, a type of flat nozzle can be formed. As a result, a flow area behind the opening can be influenced without using a longitudinal wall.If the air guiding elements are oriented in such a way that the flow opening is closer to the inlet side than the plane of the transverse wall, a type of storage surface or receiving region for the particles can be formed, wherein particles separated in this region can collect.The remaining wall between the openings can likewise serve for receiving the particles and form a type of frame element. The wall may be formed from a paper material so that the apertures can be easily punched out or cut out.According to an advantageous embodiment, the at least one transverse wall can have three openings, wherein at least one air guiding element is arranged on each opening. As a result, each opening can be formed to be many times smaller than the area of the transverse wall, wherein the air flow can flow through the transverse wall at different positions. In particular, at least one air guiding element can be arranged behind each opening, which deflects the air flow behind the opening in the direction of the outlet side in a desired direction inclined to the plane of the transverse wall.According to an advantageous embodiment, the at least one opening can be slot-shaped, wherein the opening runs almost over a complete width or a complete height of the transverse wall. For example, at least three, in particular three or four, slots can be arranged parallel to one another, wherein identical air guiding elements are formed on at least two slots. The outermost slots can have air guiding elements of a different type than the inner slots or the inner slot, so that an air flow can be directed in a targeted manner, and no vortices occur in the edge regions of the filter insert. All slots can likewise have identical air guiding elements. In a preferred embodiment, the two embodiments just described can be arranged alternately one behind the other in order to form a filter insert. The air guiding elements of adjacent transverse walls are preferably either aligned with one another or pointing away from one another. Thus, a targeted air line can be achieved which has a plurality of storage surfaces and a plurality of nozzles for accelerating the air flow.According to an advantageous embodiment, a plurality of transverse walls can be arranged parallel to one another in the receiving element, wherein, in the case of transverse walls arranged one behind the other, the openings are arranged offset from one another. For example, a transverse wall with three slots can be arranged alternately with a transverse wall with four slots in order to achieve the slots arranged offset from one another.In other words, a plurality of transverse walls are preferably arranged one behind the other in such a way that the openings are formed at different positions on the transverse wall. The positions may be arranged next to one another and / or may overlap. Thus, the air flow can be decelerated and / or deflected differently at different positions, wherein in particular a wave-shaped and laminar flow can be formed.According to an advantageous embodiment, the air guiding elements of adjacent transverse walls can be aligned on opposite sides with respect to the plane of the respective transverse wall, such that the air guiding elements of adjacent transverse walls are either aligned with one another or point away from one another. As a result, nozzles can be formed in a transverse wall, and storage areas or receiving areas for particles in the following transverse wall. This can be repeated, so that nozzles and storage surfaces are formed alternately within the filter insert. The storage surfaces are in particular formed as U-shaped or V-shaped regions, wherein the particles can collect therein.The air can therefore be continuously accelerated while continuously providing storage areas for the separation of particles. The particles are deposited in particular by the particles not being deflected in the trajectory according to Newton's law, while the air is deflected. Deposition can therefore take place in the storage surfaces while the air flows to the next nozzle. By depositing the particles, the passages are further reduced, and the nozzle function can be further increased.According to an advantageous embodiment, the filter insert can have at least three, in particular three to ten, transverse walls. The transverse walls can have, for example, alternately identically openings and identically oriented air guiding elements, so that a looped air path can be formed.Preferably, the transverse walls are arranged at least partially at different distances from one another. In one embodiment, the transverse walls that are closer to the inlet side can be arranged at a greater distance from one another than the transverse walls that are closer to the outlet side. This makes it possible to ensure that even in the region of the inlet side, blocking by adhering particles is avoided if a large number of particles already adhere to the transverse walls there.In a further embodiment, the transverse walls can be formed alternately with a greater and a smaller spacing. As a result, a greater distance, in particular a greater cavity, from the next transverse wall can be present in front of a nozzle than behind the nozzle, so that sufficient air can be sucked in. In particular, in front of the nozzle, the air guiding elements of the previously arranged transverse wall are oriented in the direction of the nozzle. As a result, air guidance through the air guiding elements takes place within the gap between the two transverse walls. In other words, the larger distances or cavities are partially spanned by the air guiding elements, so that the air can be guided in a desired direction in the larger cavities.In a further embodiment, the transverse walls can all be arranged equidistant from one another. The different filter thicknesses can be formed by the size and geometry of the openings and the size, geometry and inclination of the air guiding elements.According to an advantageous embodiment, the air guiding element can contact the transverse wall with one side edge, and in particular remaining side edges of the air guiding element can be designed as free edges. For example, the air guiding element can have a rectangular shape. The side edge with which the air guiding element contacts the transverse wall can be a long side edge of the rectangular shape. As a result, a type of wing can be formed which is connected to the transverse wall with one side edge and is present with the remaining three side edges without contact with the transverse wall. A separation edge for the air flowing past can be formed on the free edge, wherein particles can separate there. The free edge allows droplet formation, so that the particles can drip down. As a result, the filter module can accommodate more particles, since open air guidance is made possible over a longer period of time. In particular, the side edge with which the air guiding element contacts the transverse wall is connected to a side edge of the opening. The air guiding element can be formed, for example, as a developed part of the transverse wall.The air guiding element can in particular have a surface area which is smaller than or equal to the surface area of the opening. In particular, the air guiding element has a surface which is formed to be less than or equal to half the surface of the opening. Thus, for example, two air guiding elements can be arranged on the right and left of the opening, i.e. in particular on two opposite side edges of the opening. The two opposing air guiding elements can be identically formed and, for example, formed integrally with the transverse wall as an angled part of the transverse wall.According to an advantageous embodiment, the air guiding element can be inclined at an angle of 10° to 80°, in particular 40° to 70°, with respect to the plane of the transverse wall. For example, the air guiding element can be inclined at an angle of 30 to 45° with respect to the plane of the transverse wall. If air guiding elements are provided on two opposite lateral edges of the opening, these may have the same inclination, wherein in particular both air guiding elements point into the middle of the opening or are aligned with the middle of the opening. As a result, a flow opening can be formed which results from two side edges of the two air guiding elements lying next to one another.According to a further development, the air guiding element can be formed integrally with the transverse wall. In particular, each air guiding element can be formed as an angled part of the transverse wall, so that a recess-free transition of the transverse wall to the air guiding element results. The air guiding element can be formed as a kind of wing or flap which is formed inclined with respect to the plane of the opening and the plane of the transverse wall. In order to make it possible to angle the air guiding element from a manufacturing point of view, slots can be provided in the bending plane between the air guiding element and the transverse wall. Thus, the air guiding element can be formed from at least a part of the material which is removed from the transverse wall in order to form the opening.According to a further development, the air guiding element can be aligned rigidly with respect to the transverse wall, so that it is not moved by the air flow, wherein in particular the at least one transverse wall is formed in two layers. If the transverse wall consists, for example, of two layers, in particular two layers of a paper material, these can be bonded to one another. The two layers can be glued to one another already in such an orientation that the at least one inclined air guiding element is shaped and fixed in the angled position by the adhesive layer. For this purpose, a mold and a pressing tool can be used, for example.According to one embodiment, a flow region which is funnel-shaped in a plane can be formed by two air guiding elements, wherein the opening is formed larger than the flow opening. This can be achieved, for example, by arranging one air guiding element on each of two opposite side edges of the opening, wherein in particular the two air guiding elements are oriented in the direction of a central axis of the opening. A type of nozzle can be formed which accelerates the air according to the Venturi principle. For example, a flow opening can be formed on the central axis of the opening. It is furthermore conceivable for the two air guiding elements to be configured differently, such that the flow opening does not lie on the central axis of the opening. If, for example, one air guiding element is formed to be less wide than the other, the flow opening can be formed more in the region of the less wide air guiding element. As a result, an even more targeted air guidance in a desired direction can be achieved.According to one embodiment, the at least one transverse wall can be oriented transversely to a connecting plane between the inlet side and the outlet side. The transverse wall can thus be oriented transversely to an air flow. The transverse wall is preferably oriented orthogonally to the air flow. In contrast, the air guiding element is preferably oriented at an angle to the connecting plane between the inlet side and the outlet side, and in particular at an angle to the plane of the transverse wall. As a result, a flow can be generated which is not aligned parallel to a connecting plane between the inlet side and the outlet side. By means of a plurality of openings with air guiding elements arranged thereon, the flow within the filter module can thereby be controlled in a targeted manner. For example, a plurality of different wave-shaped, and in particular laminar, flows can be achieved from the inlet side in the direction of the outlet side.According to an advantageous embodiment, the transverse walls can be arranged parallel to one another. All transverse walls can thus be oriented transversely to the air flow, so that the air flow is deflected in the flow direction by the at least one air guiding element.According to a preferred embodiment, the transverse walls can be connected to one another at at least one side edge via a longitudinal connection, so that a continuous filter insert is formed. As a result, a modular system can be formed, wherein the filter insert can be inserted in one piece into the receiving element. The longitudinal connection can be pivotably fastened to the transverse walls, so that the filter insert can be pushed together, so that the transverse walls are arranged parallel and contact one another for transport. For example, two longitudinal connections can be arranged on two opposite sides, into which the transverse walls are inserted.According to a further development, the transverse walls can run over a complete length between the inlet side and the outlet side and / or the at least one longitudinal wall can run over a complete width of the receiving element, so that only one filter insert spans an interior space of the receiving element. Due to the uniform distribution of the particles on all transverse walls or all longitudinal walls, an exchange of individual elements of the filter insert is therefore not necessary in order to ensure continuous operation.According to one embodiment, the inlet side of the receiving element can have at least one opening which is larger than the at least one opening of the transverse wall closest to the inlet side. As a result, the entry of the air stream to be cleaned into the receiving element can be optimized.In an advantageous embodiment, the receiving element and / or the filter insert can contain a recyclable material and / or the filter module can be designed as a paper filter module. Preferably, the transverse walls and the receiving element consist of cardboard. Such a filter module can also be easily disposed of, in particular burnt, with adhering particles. In addition, the manufacturing costs are minimal.According to an advantageous embodiment, at least one sensor for measuring the speed of the cleaned air flow and / or for measuring a resistance value can be arranged at the outlet opening. Advantageously, it is thereby possible to determine when a filter module has to be replaced. If the speed of the cleaned air flow is below a threshold value, for example, it can be assumed that the filter module is contaminated in such a way that hardly any more air can flow through.According to a further development, a chamber can be arranged on the outlet side within the receiving element, which serves to receive a filter element. In this way, a stage for ultra-fine filtering can be formed which filters out the smallest particles from the air stream.According to an advantageous embodiment, the receiving element can be resealable or re-openable, wherein at least one closure element is formed on a side surface of the receiving element. Preferably, the closure element can be completely recessed within the side wall of the receiving element, so that it does not prevent a plurality of filter modules from being arranged on top of one another or next to one another, in order to form a contiguous surface.According to a further concept, a method for assembling a filter module can be provided. In this case, prior to the placement, by contacting the at least one longitudinal connection over the entire surface with the transverse walls, an essentially two-dimensional structure without cavities can be present, which is transformed by the placement into a three-dimensional structure with transverse walls spaced apart from one another, without the transverse walls or the at least one longitudinal connection being kinked.Advantageously, the receiving element can likewise be present as an essentially two-dimensional structure, and can be constructed in a comparable manner to a cardboard. Both elements, i.e. the receiving element and the filter insert, can thereby be transported in a space-saving manner. The assembly of the filter module is also possible in a time-saving manner and without prior knowledge.In an advantageous embodiment of the method for producing the transverse wall, a mold and a pressing tool can be used. The mold can consist of two molded components, between which the transverse wall with the air guiding elements can be arranged. In a first shaped component, a support surface and a support surface inverse thereto can be provided in a second shaped component, wherein the support surfaces simulate the shape of the transverse wall with the air guiding elements angled thereto. By pressing the two molded components against one another, the transverse wall with the at least one angled air guiding element can thereby be produced. This can be achieved in particular by the transverse wall being formed from two layers which can be fixed to one another by means of an adhesive layer. The surfaces of the two layers that are bonded to one another allow the angled section of the air guiding element to be fixed with respect to the transverse wall.The above embodiments and developments can be combined with one another as desired, if appropriate. Further possible embodiments, developments and implementations of the invention also include combinations of features of the invention described above or below with respect to the exemplary embodiments, which combinations are not explicitly mentioned. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.CONTENT INDICATION OF THE DRAWINGThe present invention is explained in more detail below with reference to the exemplary embodiments indicated in the schematic figures of the drawing. The following are shown: FIG. 1 shows different embodiments of transverse walls of a filter insert; FIG. 2 shows a further embodiment of a transverse wall of a filter insert; FIG. 3 shows an embodiment of a filter module in a schematic illustration; FIG. 4 is an isometric view of a filter insert; FIG. 5 shows a flow behavior within a filter module; FIG. 6 shows a top view of embodiments of the filter module; FIG. 7 shows a top view of embodiments of the filter module; FIG. 8 shows detailed views of the air guiding elements; FIG. 9 shows a method step in the production of a transverse wall; FIG. 10 shows a detailed view of the air guiding elements before the completion of the transverse wall; FIG. 11 shows an embodiment of a filter module in an isometric illustration with a detailed view of a closure element.The accompanying figures of the drawing are intended to provide a further understanding of the embodiments of the invention. They illustrate embodiments and, in conjunction with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the advantages mentioned are evident with reference to the drawings. The elements of the drawings are not necessarily shown to scale with respect to each other.In the figures of the drawing, elements, features and components that are the same, functionally the same and act the same-unless stated otherwise-are each provided with the same reference numerals.DESCRIPTION OF EMBODIMENTSFIG. 1 shows different embodiments of transverse walls 7 of a filter insert 6. the transverse walls 7 each have openings 8, at least one air guiding element 9 being provided at each opening 8. The openings are slot-shaped, each opening 8 running almost over a complete height of the transverse wall 7.As shown in FIG. 1( a), in this embodiment the transverse wall 7 has three openings 8, wherein two air guiding elements 9 are provided in each opening 8. Each of the air guiding elements 9 is in contact with the transverse wall 7 with a side edge, so that each air guiding element 9 is formed as a type of wing or as a type of tab. In this embodiment, the respective air guiding elements 9 of an opening 8 are aligned with a central axis of the opening 8, so that a flow opening 27 is formed between two free side edges of the air guiding elements 9. This is characterized in FIG. 2. It would likewise be conceivable for the two air guiding elements 9 to have a different width, such that the flow opening 27 does not lie on a central axis of the opening 8. As a result, the air flow can be deflected in a further desired direction and a type of nozzle can be formed.The free side edges can form a separation edge for the air flowing past, so that particles can separate there. The free side edge allows droplet formation of the particles separated there, so that the particles can drip down in the filter module. The service life can thereby be considerably improved, since not all separated particles adhere to the side walls until the end of the running time of the filter and block the latter at an early stage. An open air guidance is therefore possible for a substantially longer time than in known filters with interconnected transverse and longitudinal walls.In the embodiment according to FIG. 1( b), the transverse wall 7 has four openings 8. The two central openings 8 are formed identically to the openings 8 in FIG. 1( a). The two outer openings 8 each have only one air guiding element 9, which is connected at one side edge to a side edge of the opening 8. If the two transverse walls 7 of FIGS. 1( a) and 1( b) shown are arranged one behind the other, then a flow can be generated which alternately provides nozzles and storage areas or receiving spaces, as shown for example in FIGS. 5 and 6.FIG. 2 shows a further embodiment of a transverse wall 7 with openings 8. It can be seen thereby that in this embodiment the air guiding elements 9 have a plurality of slots 31 on a side edge of each air guiding element 9 in a bending plane, in particular in a fold 30. As a result, an angle of the air guiding element 9 relative to a plane of the transverse wall 7 can be simplified. Furthermore, the transverse wall 7 has recesses 24 on two opposite side edges, which recesses are formed with receptacles 23 for a longitudinal connection 14, as shown in FIG. 4. Furthermore, the flow opening 27 is illustrated by way of example at an opening 8, wherein the flow opening 27 is formed by two opposite side edges of two adjacent air guiding elements 9 and is arranged offset in the plane with respect to the plane of the transverse wall 7. The flow opening 27 has a smaller area than the opening 8, and a nozzle can thereby be formed which has a funnel-shaped flow region 10, as shown by way of example in FIG. 8( b).FIG. 3 shows a filter module 1 with a receiving element 2 and a filter insert 6 with the lid 29 open. The openings 8 in the transverse walls 7 are not shown for reasons of clarity. On the inlet side 3 an opening 13 is arranged which can correspond for example to the opening 8 (not shown) of the transverse wall 7 which is arranged closest to the inlet side 3. Opposite the inlet side 3, an outlet side 5 is arranged on the receiving element 2, which outlet side has an opening 28. The opening 28 is preferably formed almost over the entire side surface of the receiving element 2, in order to ensure removal of the cleaned air 4 bas quickly as possible.Below the filter module 1, in particular below the receiving element 2 or also in the receiving element 2, in particular below the filter insert 6 and / or on a base of the receiving element 2, a type of collecting trough or trough can be arranged. This can be formed from the same material as the filter module, in particular from a cardboard material, preferably with a coating which is wet-resistant on one side. This can prevent the filter module from overflowing and the installation from becoming soiled, in particular if wet lacquers drip off downward.FIG. 4 shows an isometric view of a filter insert 6. At a lateral end of the transverse walls 7, the transverse walls 7 can be connected to one another via longitudinal connections 14. For this purpose, each transverse wall 7 can have receptacles 23 and recesses 24. The three-dimensional structure can be produced by the longitudinal connections 14. The longitudinal connection 14 can have recesses 22, for example, into which an operator can engage with the fingers. As a result, the longitudinal connection 14 can be easily placed. Advantageously, the longitudinal connection 14 also has a fold 25 which extends over the length of the longitudinal connection 14. If an operator now engages in the recesses 22 with the fingers, the longitudinal connection 14 folds along the fold 25, so that the latter can be placed more easily. The longitudinal connection 14 is preferably formed somewhat longer than the distance between the two receptacles 23, so that the latter can be securely braced therebetween.FIG. 5 shows a flow behavior within a filter module. The transverse walls 7 are each arranged in mirror-image with respect to one another, such that the air guiding elements 9 of adjacent transverse walls 7 are either aligned with one another or point away from one another. Accordingly, the transverse walls 7 are alternately aligned either as shown in position A or as shown in position B. Thus, either nozzles or U-shaped or V-shaped receptacles are formed. As a result, the air flow 4 is redirected in a serpentine manner as shown. In particular, the distance, i.e. the cavity 19, from A to B can be greater than the distance from B to A, so that the flow can be optimized.When the air stream 4 ato be cleaned flows through an opening 8 of the first transverse wall 7 (uppermost transverse wall in the illustration which is marked A) through the two air guiding elements 9, in each case, the air stream 4 ais accelerated in accordance with the Venturi principle. The air with the particles impinges against the next transverse wall 7 (marked B), wherein the transverse wall 7 has in the region an, in particular U-shaped or V-shaped, receiving region through two air guiding elements 9 of adjacent openings 8. Particles can collect in the receiving area, wherein these are separated by deflecting the air according to Newton's law. The particles are therefore not deflected in the acceleration direction and land in the receiving region while the air is deflected. The direction of the particles is represented by the small arrows which point in the direction of the U-shaped or V-shaped receiving regions, and the direction of the air is characterized by the contiguous and deflected arrows. The receiving regions are identified in FIG. 5( b) by the dashed regions, for which reason the flow arrows are shown partially covered. It should therefore be noted that the flow of FIG. 5( b) corresponds to that of FIG. 5( a). The air guiding elements 9 of the second transverse wall (uppermost transverse wall B) are oriented in the direction of the first transverse wall 7 (uppermost transverse wall A). As a result, the air is accelerated again in the direction of the first transverse wall, wherein, as it were, further particles can be deposited in a receiving region from the rear side of the first transverse wall 7. Particles are thus deposited continuously in the dashed areas in FIG. 5( b), as a result of which the air is accelerated further and further owing to the narrowing nozzle. In particular, this makes it possible to save energy, preferably more than 30%, in comparison with known filters, since the open air conduction makes it possible to keep the air resistance (differential pressure) low for a long time.FIG. 5( c) shows the detail C from FIG. 5( a), wherein the air guidance by the air guiding elements 9 and the deflection of the air by the air guiding elements 9 of the adjacent transverse wall 7 is shown. The nozzle shape can be seen here, wherein the air guiding elements 9 of the first transverse wall 7 (at the top) form in particular a flat nozzle. Furthermore, the receiving region can be seen through the second transverse wall 7 (at the bottom), wherein the air is deflected by the air guiding elements 9 of the second transverse wall, namely in the direction of the first transverse wall 7. Subsequently, the air is deflected again in the direction of the second transverse wall 7, then flows through the openings 8 of the second transverse wall 7 and through the air guiding elements 9 of a third transverse wall (not shown). The principle is then repeated, wherein the air is accelerated by the air guiding elements 9 of the third transverse wall 7, which form a nozzle shape.FIG. 6 shows two plan views or sectional representations of two further embodiments. The direction of the air flow 4 is represented by the arrows. Each of the air flows 4 is formed as a wave-shaped or serpentine flow. Such a flow can be formed in particular by alternately arranging two different embodiments of transverse walls 7 one behind the other. The two embodiments can be embodied as in FIG. 1. If such transverse walls 7 are arranged with intermediate cavities 19, the air flow 4 can be guided in a wave-shaped manner through the openings 8. The air flow can be accelerated by the respective transverse walls 7, in which the air guiding elements 9 form a funnel-shaped flow region. By means of the respective following transverse wall 7, a receiving region or a storage surface for separated particles can be formed by the air guiding elements 9.Two embodiments are shown in FIG. 6, each of which has a different number of openings 8 and a different number of transverse walls 7.These are exemplary, wherein arrangements differing therefrom are possible.In FIG. 6 ( a), the receiving element 2 has a chamber 15 on the outlet side 5, in which a filter element 16 is arranged. The filter is in particular designed as an integrated fine and / or post filter. As a result, the air 4 ato be cleaned can be very finely cleaned in a final step.Figs. 7(a) and 7(b) each show a plan view of another embodiment. In this embodiment, the transverse walls 7 are arranged at different distances from one another (the air guiding elements are not shown). The transverse walls 7 are preferably arranged at a greater distance from one another in the region of the inlet side 3, since most particles from the air to be purified adhere to the filter insert 6 in this region. In the region of the outlet side 5, the transverse walls 7 are arranged closer to one another. This allows fine cleaning of the air flow. In such an arrangement, a uniform distribution of the particles over the complete filter insert 6 can particularly preferably be achieved, so that the filter module 1 can be effectively used over a particularly long period of time.Each transverse wall of FIGS. 6 and 7 can be formed, for example, as in FIG. 1 or FIG. 2.FIG. 8 shows the air guidance through an opening 8 with two air guiding elements 9 in detail. According to FIG. 8( a), the transverse wall 7 is formed integrally with the two air guiding elements 9, and is produced from one component. According to FIG. 8( b), the transverse wall 7 with the two air guiding elements 9 is formed in two layers, wherein the two layers are connected to one another via an adhesive bond or adhesive layer. With both embodiments, in the plane of the transverse wall 7 a type of frame element 11 can be formed which is formed around the openings 8. The air guiding elements 9 are formed at an angle 34 to the plane of the transverse wall 7 or of the frame element 11 and are arranged on one side of the transverse wall 7. According to an advantageous embodiment, the angle 34 can be between 10° to 80°, in particular 40° to 70°. For example, the air guiding element 9 can be inclined at an angle 34 of 30 to 45° with respect to the plane of the transverse wall 7. It would likewise be conceivable for the two air guiding elements 9 to be oriented in two different directions with respect to the plane of the transverse wall 7, correspondingly one upward and one downward in the illustration.FIG. 9 shows a method for producing, wherein two molded components 33 serve as pressing tools. The shape of the transverse wall 7 is reproduced on a surface of the molded components 33, wherein a second molded component 33 has the inverse surface to a first molded component 33. By pressing, illustrated in the arrow direction, the angled orientation of the air guiding elements 9 with respect to the transverse wall 7 or the frame element 11 can be achieved. This can be achieved in particular by the transverse wall 7 and the air guiding elements 9 being formed in two layers, wherein an adhesive bond is formed on mutually aligned surfaces of the layers. If this adhesive layer cures, the air guiding elements 9 can be fixed at an angle to the plane of the transverse wall 7.In FIG. 10, the geometry of the air guiding elements 9 with respect to the opening 8 is shown in detail. In the enlarged illustration, the air guiding elements 9 are shown before they are oriented at an angle to the plane of the transverse wall 7. It can be seen here that the air guiding elements 9 are formed from a part of the material which is removed from the opening 8 and / or which is suspended from the frame element of the transverse wall 7. In order to make it possible to angle the air guiding elements 9 relative to the plane of the transverse wall 7, i.e. relative to the frame element 11, in particular a plurality of slots 31 can be provided in a bending plane between the air guiding elements 9 and the transverse wall 7 or the opening 8. The bending plane is described by the fold 30. In order to further optimize production, recesses 32 can be provided, so that the air guiding elements 9 are connected to the transverse wall 7 only with one side edge, and are formed at the three further side edges at a distance from the opening 8 or the transverse wall 7. This makes it possible to simplify the angling of the air guiding elements 9 relative to the plane of the transverse wall or to the frame element 11.FIG. 11 shows an embodiment of a filter module 6 in an isometric illustration with a detailed view of a closure element 18. The top side 20 has four elements which together form a cover 29. Two closure elements 18 are arranged on two of the elements. Two further elements of the cover 29 each have two slots 27. The slots 27 are offset from each other. Consequently, the closure elements 18 are also arranged offset relative to one another in the same way.In the detailed view in FIG. 11( b), it can be seen that the closure element 18 consists of a tab 26 which can engage in a slot 27 in a further element of the cover 29. The tab 26 is inserted into the slot 27 from above and bent in the direction of the arrow. As a result, the receiving element 2 has a planar upper side 20. The top side 20 is configured in a comparable manner to a packaging carton, having two inner flaps and two outer flaps which together form a lid 29.In this embodiment, the receiving element 2 has four substantially rectangular openings 13 on the side face which forms an inlet side 3. Before the filter module 1 is used, these can be closed by removable elements in order to prevent soiling of the filter insert 6. These removable elements can easily be removed manually via engagement holes or recesses. For this purpose, the shape of the openings 13 is preferably characterized by a perforation. Similarly, on the outlet side 5, the opening 28 can first be closed by a removable element.Although the present invention has been fully described above with reference to preferred exemplary embodiments, it is not restricted thereto, but can be modified in a variety of ways.For example, the openings 8 can have different configurations. The shape can deviate from the rectangular or square slot shape shown. Likewise, the arrangement of the openings may differ from the manner shown. Furthermore, the air guiding elements 9 can have different geometric configurations from the representations or can be angled differently with respect to the plane of the transverse wall 7.List of reference characters1 Filter module 2 Receiving element 3 Inlet side 4 Air flow 5 Outlet side 6 Filter insert 7 Transverse wall 8 Opening of the transverse wall 9 Air guiding element 10 Flow region 11 Frame element 12 Interior space 13 Opening of the inlet side 14 Longitudinal connection 15 Chamber 16 Filter material 17 Side surface 18 Closure element 19 Cavity 20 Upper side 21 Plate element 22 Recess 23 Receiving of the transverse wall 24 Recess 25 Fold 26 Tab 27 Flow opening 28 Opening of the outlet side 29 Cover 30 Fold 31 Slot 32 Recess 33 Molded component 34 Angle

Claims

Filter module (1) for separating particles from contaminated air, in particular for separating colour particles from an air stream, having a receiving element (2) which has an inlet side (3) for the inlet of an air stream (4a) to be cleaned and an outlet side (5) for the outlet of the cleaned air stream (4b), wherein the inlet side (3) and the outlet side (5) are arranged opposite one another on the receiving element (2), at least one filter insert (6) which is received in the receiving element (2), wherein the filter insert (6) has at least one transverse wall (7) with at least one opening (8), wherein at least one air guiding element (9) is arranged on the opening (8), which is arranged inclined with respect to a plane of the transverse wall (8), such that the air flow (4) can be deflected from the inlet side (3) in the direction of the outlet side (5) by the air guiding element (9).Filter module (1) according to claim 1, characterised in that two air guiding elements (9) are arranged on the opening (8), so that a flow opening (27) is formed, which is formed offset to the opening in the transverse wall (7), and the air flow (4) can flow through the flow opening (27).Filter module (1) according to one of the preceding claims, characterized in that the at least one transverse wall (7) has at least three openings (8), wherein at least one air guiding element (9) is arranged on each opening (8), and / or in that in particular the at least one opening (8) is slot-shaped, wherein the opening extends virtually over a complete width or a complete height of the transverse wall (7).Filter module (1) according to one of the preceding claims, characterized in that a plurality of transverse walls (7) are arranged parallel to one another in the receiving element (2), wherein, in the case of transverse walls (7) arranged one behind the other, the openings (8) are arranged offset from one another.Filter module (1) according to Claim 4, characterized in that the air-guiding elements (9) of adjacent transverse walls (8) are oriented on opposite sides with respect to the plane of the respective transverse wall (8), such that the air-guiding elements (9) of adjacent transverse walls (8) are either oriented towards one another or point away from one another.Filter module (1) according to claim 4 or 5, characterised in that the filter insert (6) has at least two, in particular three to ten, transverse walls (7).Filter module (1) according to one of the preceding claims, characterized in that the air guiding element (9) contacts the transverse wall (7) with one side edge, and in particular remaining side edges of the air guiding element (9) are designed as free edges.Filter module (1) according to one of the preceding claims, characterized in that the air guiding element (9) is inclined at an angle of 10° to 80°, in particular 40° to 70°, with respect to the plane of the transverse wall (7).Filter module (1) according to one of the preceding claims, characterized in that the air guiding element (9) is formed integrally with the transverse wall (7).Filter module (1) according to one of the preceding claims, characterized in that the air guiding element (9) is aligned rigidly with respect to the transverse wall (7) so that it is not moved by the air flow (4), wherein in particular the at least one transverse wall (7) is formed in two layers.Filter module (1) according to one of Claims 2 to 10, characterized in that a flow region (10) which is funnel-shaped in a plane is formed by two air-guiding elements (9), the opening (8) being formed larger than the flow opening (27).Filter module (1) according to one of the preceding claims, characterized in that the at least one transverse wall (7) is oriented transversely to a connecting plane between the inlet side (9) and the outlet side (8), and the at least one air guiding element (9) is oriented at an angle between the inlet side (9) and the outlet side (8).Filter module (1) according to one of the preceding claims, characterized in that the transverse walls (7) are connected to one another at at least one side edge via a longitudinal connection (14), such that a coherent filter insert (6) is formed, and / or in that the at least one transverse wall (7) extends over a complete width of the receiving element (2), such that only one filter insert (6) spans an interior space (12) of the receiving element (2).Filter module (1) according to one of the preceding claims, characterized in that the inlet side (3) of the receiving element (2) has at least one opening (13) which corresponds larger than the at least one opening (8) of the transverse wall (7) closest to the inlet side (3).Filter module (1) according to one of the preceding claims, characterized in that the receiving element (2) and / or the filter insert (6) contain a recyclable material.Method for producing a transverse wall for a filter module according to one of Claims 1 to 15, characterized in that the transverse wall (7) and the air-guiding element (9) are formed in one piece, wherein the inclination of the air-guiding element (9) relative to the transverse wall (7) is formed by a pressing method, wherein the air-guiding element (9) is fixed immovably at a predetermined angle (34) with respect to the plane of the transverse wall (7) in particular by a stiffening adhesive material.

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