AT505674B1 - FILTRATION DEVICE FOR FILTRATION OF PARTICLE LOADED AIR FLOWS - Google Patents

Abstract

The invention relates to a filter device (1) for particle-laden air streams, comprising a housing (2) with an air inlet opening (3) for contaminated air, an air outlet opening (4) for filtered air, a partition wall (6), the housing (2). subdividing into a dirty air chamber (7) and into a clean air chamber (8), a filter element (9) whose filter medium (10) projects into the dirty air chamber (7) and builds a filtering air flow connection between it and the clean air chamber (8). In addition, a coupling device (12) for interchangeable mounting of the filter element (9) is formed which comprises at least one electrical conductor or at least partially made of an electrically conductive material, wherein a on the support member (16) arranged coupling member (14) has a hook-shaped extension and a, on the filter element (9) arranged, rod-shaped coupling member (15) engages behind and is designed to transfer electrostatic charges starting from the filter element (9) on the housing (2) and thus for dissipation from ground potential. Furthermore, a collecting device (35) for receiving particles filtered out of the air stream is formed. This collecting device (35) comprises a disposable collecting container made of electrically conductive material, which is electrically conductively connected to the collecting device (35) by means of at least one electrically conductive contacting point and is designed to transfer electrostatic charges to the housing (2).

Description

Austrian Patent Office AT505 674B1 2010-03-15

Description: [0001] The invention relates to a filtering device for filtering particle-laden air streams, as specified in claims 1 and 13, respectively.

From the prior art known standard constructions of filtering devices have an outwardly substantially airtight housing, which has at least one air inlet opening for the laden with particles raw gas and at least one air outlet opening for the filtered clean gas. This housing is divided by means of a partition in at least one dirty air chamber and in at least one clean air chamber. At least one replaceable filter element, whose filter medium preferably projects into the dirty air chamber, produces a particle-filtering flow connection between the dirty air chamber and the clean air chamber. The filter medium of the filter element preferably projects into the dirty air chamber and flows through the raw gas to be purified, starting from the outside of the filter medium through the filter element. In order to clean or replace filter elements which are either heavily contaminated or at the end of their usefulness, either threaded spindle arrangements or bayonet-type coupling connections are provided between the filter element and the partition wall or a mounting flange for the filter element. For discharging particles separated from the airflow, either outlet or cleaning openings or discharge devices, such as e.g. Augers, provided. However, the handling of such filtering devices is only partially satisfactory. In addition, the filtering devices known from the prior art can not meet increased operational reliability requirements.

DE 698 11 354 T2 describes an air filter which is held in a replaceable filter cartridge, which is inserted into a mounted between the radiator and wall air distributor. The air distributor is provided with adjustable air openings and distributes the respective amount of fresh air along the rear side of the radiator, to allow a good mixing with the room air. The air distributor acts as a reservoir for moisture, which gets into the air distributor with the fresh air.

In DE 195 30 526 A1, a fuel filter made of electrically conductive material is described, which allows in an expedient embodiment a simple connection of an electrical grounding cable. A tool-free and thus quicker and more comfortable change of the filter is not possible hiebei.

DE 299 05 847 U1 describes a holder for a liquid filter whose coupling device parts are made of an electrically non-conductive plastic, wherein the grounding specific electrically conductive material can be attached later to the bracket.

The present invention has for its object to provide a filtering device of the type mentioned, which has an increased reliability and at the same time has a high degree of error safety with regard to operating and maintenance activities on the filtering device.

This object of the invention is achieved on the one hand by a filtering device according to claim 1.

In the filtering device according to the invention has the advantage that it has a particularly high level of error safety with regard to operating and maintenance operations and this error safety benefits increased reliability of the filtering device. In addition, a high operating and handling comfort for the operating and maintenance personnel of the filtering device is achieved. In particular, a filter element to be removed from the filtering device for cleaning or replacement purposes can be removed relatively quickly and conveniently, or a new or cleaned filter element can be reused particularly quickly and fail-safe. In particular, via the coupling device, a rapid installation and removal or a rapid replacement of a 1/25 Austrian Patent Office AT505 674B1 2010-03-15

Filter element achieved. The coupling device for the filter element is preferably without tools or without the need for auxiliary tools to use, so at any time rapid maintenance is possible or spontaneous service or maintenance can be performed. A significant advantage of the filtering device according to the invention lies in the fact that carelessness or forgetfulness or forgetfulness of an operator or maintenance person for the filtering device can not lead to a deterioration of the reliability of the filtering device. In particular, the grounding of the filter element is automatically or forcibly ensured when installing a new or cleaned filter element in the filtering device via the coupling device. That is, a properly positioned or ready-to-use positioned filter element is reliably grounded and thus gradually emerging on the filter element electrostatic charges are continuously derived from ground potential. This is achieved in a particularly advantageous manner without separate or without additional manual grounding measures on the filter element. In particular, an electrically conductive connection between the filter element and the housing of the filtering device is established solely by the coupling of the filter element to the filtering device by means of the coupling device. Forgetfulness or carelessness can thus not lead to critical operating conditions in the filtering device according to the invention and also the time required for a filter change or filter replacement is as low as possible, so that maintenance-related downtime can be reduced to a minimum.

Furthermore, a quick and at the same time as comfortable as possible change or removal and installation of a filter element is achieved after a quick and easy handling can be achieved by means of a mechanical coupling connection. A particular advantage is further that no tools are required to operate the positive-acting coupling device can. By making and canceling the positive connection between the support member and the filter element also a particularly simple or intuitively quickly traceable mounting process or process for a filter change is reached.

Furthermore, on the one hand a high handling comfort can be achieved by the inventive design and on the other hand, a handling of the filter elements can be achieved, which excludes person-dependent mishaps as far as possible. In particular, it is made possible by the hook-shaped extension to mount the filter element in the hook-shaped extension and accomplish this hook-shaped load-receiving means as needed raising and lowering of the filter element relative to the filter housing. The mounting and unmounting of the filter element relative to the hook-shaped extension is relatively easy to handle and easily executable even for untrained personnel. In addition, by this construction, an undesirable dropping of the filter element into the dirty air chamber, which filter element or which dirty air chamber is naturally relatively heavily dust- or particle-laden after prolonged use, can be avoided. Unwanted contamination when changing or replacing a filter element can thus be largely excluded.

It can further create a particularly cost-effective, lightweight and at the same time stable coupling member on the filter element. An essential advantage lies in the fact that the functionality or the purpose of this rod-like coupling element for the operating and maintenance personnel of the filtering device is clearly and unmistakably recognizable. In addition, this can be created in a simple manner, a central force introduction point relative to the filter element, so that the most uniform or tightest possible connection of the filter element is ensured to the corresponding sealing surface or to the corresponding mounting location within the filtering device. In addition, a skew-angled positioning of the filter element relative to the mounting or sealing surface is largely avoided by a central force application point on the rod-like, bridging coupling element. In addition, this central force introduction point a particularly tight connection of the filter element to the corresponding Austrian Patent Office AT505 674B1 2010-03-15

Ensures sealing or mounting surface within the dirty air chamber. Another advantage of this embodiment is that the rod-like coupling element can be protected from contamination or from an adhesion of deposited particles.

In the embodiment according to claim 2 it is advantageous that the support element for the filter element is positioned on the clean air side and thus protected from contamination or from an under certain circumstances abrasive loading of particles contained in the air flow. Another advantage is that the support element is provided both for supporting or holding the filter element in the removal-ready pivot angle position as well as for holding and positioning of the filter element when taking the operational pivot angle position. In particular, it can be switched or selected by adjusting the support element in a simple manner between a maintenance or removal position and an operational position.

By the measures according to claim 3, a mounting and dismounting of a filter element can be made without the need for auxiliary tools. Another advantage of this embodiment is that it is structurally particularly simple, so that a cost-effective production of the filtering device is made possible. In addition, with this embodiment, a continuous relative adjustment between the filter element and the corresponding counter or sealing surface on the housing of the filtering device are made so that any tolerances, for example. In the construction of the filter element, can be easily compensated by means of this actuator.

In the embodiment according to claim 4 is of advantage that the adjusting device also forms a pressing device, which ensures a reliable sealing of the filter element relative to the corresponding sealing surface or against a mounting or sealing flange within the dirty air chamber. The coupling device is thus designed such that when assuming the intended use position of the filter element a reliable seal with respect to bypass air flows is ensured.

By the measures according to claim 6, a reliable electrical connection between the filter element and the surrounding metallic components, in particular to the grounded housing of the filtering device is ensured. Above all, this achieves the result that the lowest possible electrical connection between the filter element and the coupling device is established, so that electrical charges arising at the filter element, which are primarily caused by the so-called frictional electricity, are continuously dissipated from ground potential and thus no fire damage. or safety-critical charges may arise.

By the measures according to claim 7, a good electrical connection is ensured in the transition region or at the contact point between the coupling device and the filter element. A secure electrical connection or a low contact resistance is achieved in particular by the fact that the current or charge transfer takes place directly within the power transmission zone between the coupling members.

The measures according to claim 8 ensures that the filter element resulting electrostatic friction charges are derived continuously or continuously and are guided via the electrical conductor in those sections of the filtering device, in which then a reliable or secure Ab- or Forwarding to ground potential occurs.

By the measures according to claim 9 it is achieved that already by the action of gravity on the filter element a good electrical contact or a sufficient electrical conductivity between the filter element and the coupling device or the housing of the filtering device is constructed. In particular, a relatively large-area contacting zone between the coupling member on the filter element and the coupling member of the coupling device is ensured, even with slight deviations from the desired position between the filter element and the coupling device, a reliable 300254 674B1 2010-03-15 electrical connection is constructed, which avoids electrostatic charges of the filter element during operation of the filtering device.

Due to the configuration of claim 10, a lifting or mounting aid is virtually created, with which a simple assembly and disassembly of a filter element is made possible. In addition, an assembly and disassembly process is thereby made possible, which almost precludes an accidental or caused by a mishap falling of the filter element in the dirty air chamber. In particular, the filter element is carried by the hook-shaped extension or held in suspension until it is grasped by the operator and removed from the dirty air chamber. Thus, contamination or contamination of the surrounding area around the filtering device can be avoided as much as possible.

In the embodiment according to claim 11 it is advantageous that the rod-like coupling element is formed or arranged on the clean air side, in particular within the filter element and is thus protected from contamination by suspended particles or from exposure to particle flows. As a result, the electrical conductivity of the coupling element is maintained long term or the electrical contact resistance between the Koppele-ment and the coupling member is kept long term at the lowest possible value.

Due to the embodiment according to claim 12, the coupling device, in particular the support element, directly positioned and stored in the clean air chamber or clean air side and only has to protrude its hook-shaped extension in the dirty air chamber. As a result, the proper functioning of the coupling device and also the electrical conductivity of the coupling device are secured in the long term. In addition, by the measure that the hook-shaped extension is surrounded dust-tight by the filter element, and the hook-shaped extension protected from contamination or contact damage.

Regardless of the aforementioned inventive solution, the object of the invention is also achieved by a filtering device according to claim 13.

It is advantageous that the ease of use of this filtering device, in particular the handling comfort in connection with the removal of separated and gradually accumulated particles is particularly high. In particular, the disposable collection container can be supplied either together with the separated particles or separated from the corresponding filter material of the corresponding disposal or recycling. Contamination of the surrounding areas is avoided as far as possible by the disposable collecting container of the collecting device. A particular advantage of the filtering device according to the invention is that in addition to the increased ease of use and pollution-safe handling high reliability is achieved. In particular, the risk of personal injury or property damage due to electrostatic charging is virtually eliminated. In particular, electrostatic charges of the plastic disposable collection container can not lead to critical conditions in connection with personal hazardous voltage flashovers. In addition, electrostatic discharges are avoided, so that no fire can be triggered in fire-prone areas. This would be critical in particular because of the dust-laden ambient air in the filtering device. Such flashovers or arc discharges could ignite dusts explosively or combustible materials can be ignited in the event of repeated voltage discharges. In the filtering device according to the invention, it is advantageous that charges arising at the disposable collecting container or potential differences caused by static electricity are safely discharged. This derivation of electrostatic charges of the disposable collection container with respect to ground potential is long-term reliable and particularly failsafe accomplished.

The advantage here is an embodiment according to claim 14, since this is a particularly cost-effective disposable collection container, which can be easily fed to the appropriate disposal or recycling. In addition, a highly contamination-free handling of the deposited particles, which are mainly formed by dusts Austrian patent office AT505 674B1 2010-03-15, allows.

The embodiment according to claim 15 enables a high receiving volume for separated particles, with only a particularly low storage volume or a particularly low space requirement for an empty, held in stock bag is required. In particular, a collection container designed as a bag for separated particles can be kept in stock in large numbers, without requiring an increased storage volume. In an advantageous manner, a plurality of bags can be stored in the smallest space and, if required, a corresponding bag can be inserted or installed at any time as a disposable collection container for particles to be separated into the filtering device.

Of particular advantage is also the embodiment according to claim 16 and / or 17, since this is a support or holding element for the inherently unstable disposable collection container is created. Thus, inter alia, a high degree of filling for the disposable collection container can be achieved. The disposable collection container can also be better protected against damage, especially from tearing during filling or during installation in the filtering device.

The measure according to claim 18, a structurally simple and yet functionally reliable hold for a bag-like disposable collection container is achieved. In particular, a bag-like disposable collection container can be supported or held and opened such that the highest possible degree of filling and a clean filling of the bag-like container is achieved.

By the measures according to claim 19, on the one hand, the tightness of the collecting device is improved during the filling or during the operation of the filtering device. Another advantage is that the bag-like disposable collection container is secured against slipping or sliding against the holding element.

By the measures according to claim 20, the bag or bag-type disposable collection container is kept particularly stable in the desired or proper receiving position. In addition, the replacement of a filled or the insertion of a new or unused disposable collection container can be done very easily and quickly. A particular advantage lies in the fact that the disposable collecting container, which consists of electrically conductive plastic, is particularly well contacted with electrically conductive, in particular with the metallic components of the filtering device, so that a reliable electrical connection to ground potential is achieved.

The measures according to claim 21, an orderly or preferably pollution-free entry of deposited particles in the baggy disposable collection container is achieved.

Of particular advantage is also the embodiment according to claim 22, since a very intimate or relatively large-area electrical contact between the disposable collecting container and the collecting device or the housing of the filtering device is produced. The emergence of electrostatic charges on plastic disposable collection container is thereby almost impossible.

The embodiment according to claim 23 ensures a secure electrical contact between the disposable collection container and the metallic parts of the filtering device under all operating conditions. In particular, a continuous and long-term good electrical contact is ensured by the mechanical bias. In addition, the bag-like disposable collection container is also reliably held in the proper or planned position during the filling process, in which the total mass continuously increases.

By the measures according to claim 24, the handling of the collecting device can be further improved. In particular, a rapid change or rapid insertion of a new, unfilled disposable collection container is made possible in the collection device. Of particular advantage is also the embodiment according to claim 25, as a result of the filtering device can be made all in all particularly compact, without causing interference in the handling of the collecting device. In particular, the collection device for maintenance purposes or for removing the disposable collection container can be easily pulled out of the filtering device. Then there is sufficient space or space to carry out the necessary measures quickly and easily. In particular, the cover element of the collecting device can be folded up or removed, removed the bag-like disposable collection container and a new disposable collection container can be used.

The embodiment according to claim 26 ensures that even if the collecting device has been completely removed or moved out of the filtering device, an electrically conductive connection remains, which avoids a build-up of electrostatic charges or an unwanted discharge of electrostatic charges.

By the measures according to claim 27, a reliable electrical connection between the cover member and the metallic components of the filtering device is also ensured if after long-term use contamination of the surfaces has occurred within the collecting device.

The embodiment according to claim 28 prevents an operator from electrically separating the collecting device from the filtering device. In particular, there always remains an electrically conductive connection between the collecting device and the filtering device, so that any electrostatic charges are continuously dissipated. A further advantage with respect to the electrical connection, which is fundamentally inseparable for an operator, is that erroneous operations or carelessness of the operating or maintenance personnel in relation to the safety-related, electrical connection can be excluded. In particular, an interruption and subsequent forgetting with respect to the production of the electrically conductive connection between the collecting device and the housing of the filtering device is excluded after this electrical connection by the operating or maintenance personnel can not be separated in principle. In addition, this avoids that the grounding for the preferably completely withdrawable from the housing collecting device is omitted due to comfort or carelessness.

Advantageous embodiments of the invention will be explained in more detail below with reference to the embodiments illustrated in the drawings.

[0039] [0048] [0048] [0048] [0048] [0048] [0049]

Show it:

1 shows an embodiment of the filtering device according to the invention in a perspective exploded view;

Fig. 2 is a sectional view of the filtering device of Fig. 1;

3 shows a coupling device of the filtering device with a carrying device for a filter element in a perspective representation;

4 is a sectional view through a filter element and through the coupling device for the filter element in a perspective view.

FIG. 5 shows a collecting device for particles deposited in the filtering device in a perspective view obliquely from above; FIG.

FIG. 6 shows the collecting device according to FIG. 5 in side view; FIG.

FIG. 7 shows the collecting device according to FIG. 5 in front view; FIG.

FIG. 8 shows the collecting device according to FIG. 5 in top view; FIG.

FIG. 9 shows the collecting device according to FIG. 5 in a sectional illustration; FIG.

FIG. 10 shows a detailed view of the sectional representation according to FIG. 9; FIG. 6/25 Austrian Patent Office AT505 674B1 2010-03-15 [0050] FIG. 11 shows the collecting device according to FIG. 5 with the cover element open; FIG. 12 shows the collecting device according to FIG. 5 with a disposable device inserted therein. FIG.

Collecting container in the manner of a plastic sack.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis transferred to like parts with the same reference numerals or identical component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these are mutatis mutandis to transfer to a new position on a change in position.

1 and 2, an embodiment of the filtering device 1 according to the invention is illustrated. This filtering device 1 serves to filter out air streams laden with particles, in particular with dust particles. In particular, particles or dusts contained in an air stream, such as e.g. Powder dusts, deposited from the air flow and preferably collected within or outside the filtering device 1. The filtering device 1 is above all suitable for being integrated into technical processes in which airborne dust can occur and for protecting the environment or the working area from the effects of dust, in particular against contamination, health hazards and the like. Of course, the filtering device 1 according to the invention can also be used for filtering or purifying gases. In particular, the terms air or air flow also include gases or gas compositions, such as e.g. Flue gases or the like. To understand.

The filtering device 1 comprises a preferably self-standing executed housing 2, in which the required technical components of the filtering device 1 are housed. The housing 2 preferably has standardized dimensions, in particular standardized dimensions of an electrical control cabinet. The filtering device 1 can thus be optimally or space-saving to existing electrical distribution systems for the technical process, in particular to electrical cabinets, strung. The outer dimensions of the housing 2 of the filtering device 1 according to the invention are particularly compact. In particular, the width of the housing 2 can be only 600 mm, the depth 700 mm and the height of the housing 2 approximately 2,100 mm, the filtering device 1, despite these compact external dimensions, being suitable for filtering large volume flows of air contaminated with floating particles. The filtering device 1 according to the invention is suitable for the treatment of air flows of up to 5000 m3 / h, preferably of about 4000 m3 / h.

The housing 2 has at least one air inlet opening 3 for the raw gas to be cleaned, in particular for the contaminated or particle-laden air. In the air flow direction after the at least one air inlet opening 3, at least one air outlet opening 4 for the correspondingly treated, in particular for the filtered, air is formed in the housing 2. The air inlet opening 3 is performed twice in the embodiment shown in the lower end portion of the front side of the housing 2. These air inlet openings 3 are designed for connecting hoses or pipelines, in which the air to be cleaned is supplied. The at least one air outlet opening 4 for purified air is preferably carried out in the upper end portion of the housing 2. In particular, the air outlet opening 4 is formed by a plurality of slots in the upper cladding element 5 of the housing 2. This means that the filter performance or the filtering quality of the filtering device 1 is so high that the filtered air can escape directly into the environment around the filtering device 1. Of course, it is also possible to associate the air outlet opening 4 with a collecting duct in order to discharge the cleaned air from the filtering device 1 and, for example, to divert it into an outdoor or outdoor area.

In the filtering device 1 further at least one partition 6 is executed, which subdivides the housing 2 into at least one dirty air chamber 7 and into at least one clean air chamber 8.

The filtering device 1 further comprises at least one filter element 9, whose filter medium 10 preferably projects into the dirty air chamber 7. This at least one filter element 9 produces a particle-filtering air flow connection between the dirty air chamber 7 and the clean air chamber 8. For this purpose, at least one breakthrough 11 is formed in the partition 6, which is covered by the filter element 9 or bypasses particle filter.

In the illustrated embodiment, two fluidically parallel filter elements 9 are arranged within the dirty air chamber 7. Of course, it is also possible to provide only one filter element 9 or more than two filter elements 9. Regardless of this, it is also possible within the scope of the invention, the at least one filter element 9, especially if the filter element 9 is designed as a hollow cylinder, to project into the clean air chamber 8 and supply the air to be filtered to the interior or cavity of the filter element 9. In the preferred embodiment shown, however, the filter element 9 protrudes into the dirty air chamber 7 and is thereby surrounded or lapped around the outer surface of the dirty air. The air cleaned or filtered by means of the filter element 9 is then transferred, starting from the inner cavity of a preferably hollow cylindrical filter element 9, into the clean air chamber 8. On the lateral surface of the filter element 9, the particles floating in the air flow are separated from the air flow. The deposited particles then fall under the effect of gravity and / or under the action of shaking and / or compressed air at least partially from the lateral surface of the filter element 9 and can be collected below the filter element 9. A part of the particles is naturally also secreted within the filter medium 10 from the air flow.

As is well known, the filtering device 1 further comprises at least one coupling device 12 for interchangeable support of at least one filter element 9 within the housing 2. According to an embodiment of the invention, this coupling device 12 has at least one electrical conductor 13 or is the coupling device 12 at least partially made of an electrically conductive material, such as Iron, aluminum or copper, formed. It is essential that the electrically conductive coupling device 12 is designed such that it is designed to transfer electrostatic charges, in particular for the transmission of electrostatic charges, starting from the filter element 9. In particular, the coupling device 12 or its electrical conductor 13 is designed to transfer electrostatic charges of the filter element 9 to the housing 2 or to ground potential. This means that the coupling device 12 ensures equipotential bonding between the filter element 9 and ground potential and prevents or does not give rise to electrostatic charging of the filter element 9. The coupling device 12 is designed such that separate manual activities for the production of the equipotential bonding or grounding of the filter element 9 are preferably completely unnecessary. In particular, the coupling device 12 is automated in such a way that, when the filter element 9 is ready for operation or ready for use, a grounding connection between the filter element 9 and ground potential, in particular an electrical connection to the housing 2, is also forcibly and automatically produced. Carelessness or forgetfulness of the maintenance or operating personnel can thus not lead to electrostatic charging of the filter element 9 during operation of the filtering device 1. The reliability and ease of use of the filtering device 1 are thereby significantly improved.

As can best be seen from FIG. 2, the at least one coupling device 12 for interchangeable mounting or positioning of at least one filter element 9 has a first coupling element 14 which corresponds to at least one second coupling element 15 or can be displaced in positive connection is. The first coupling member 14 is formed on a support member 16 mounted in the housing 2 for the filter element 9. The second coupling member 15, which can interact with the first coupling member 14 in positively coupling or form-fitting connecting interaction, 8 is formed on the filter element 9. Preferably, the first coupling member 14 is formed by a hook-shaped extension 17. This hook-shaped extension 17 projects preferably from the support element 16 in the vertical direction downwards and represents a hook-shaped load-receiving means, with which the filter element 9 can be received load-transmitting. Preferably, the first coupling member 14, in particular its hook-shaped extension 17, for engaging behind the second coupling member 15 is formed. The second coupling member 15 is preferably formed by a rod-like coupling element 18 which extends like a bridge between opposite ends or wall portions of a filter element 9 designed as a hollow cylinder 19. Alternatively, it is also possible to design the second coupling member 15 as a depression or opening in the upper side or in a cover element of the filter element 9 in such a way that the first coupling element 14, in particular its extension 17, can engage behind an undercut or an edge section around the opening , The coupling element 18 on the filter element 9 can therefore also be designed as an undercut or as an opening with marginal retaining lugs or as a loop-shaped extension.

The support member 16 supports the at least one filter element 9 within the housing 12, in particular in the clean air chamber 8, wherein the support member 16 is preferably pivotally mounted. In particular, a rotary bearing 20 is designed, with which a limited pivoting mobility of the support element 16 is accomplished. The support member 16 is within a predefined pivoting angle range in a first pivoting angle position 21 - exemplified by a dotted line - for removal of the filter element 9 from the housing 2 and at least in a second pivot angle position 22 for operational or operational positioning of the filter element 9 within the Housing 2 convertible. This second pivoting angle position 22 of the support element 16, in the receipt of which the corresponding filter element 9 is operational or ready for use in the filtering device 1 is shown in FIG. 2 in full lines and symbolized by the dashed line 22 exemplified Service.

By transferring the support element 16, starting from the shown in Fig. 2 ready positioning of the filter element 9 in the first pivoting angle position 21, in which a removal or maintenance of the filter element 9 is possible, is preferably carried out by lowering the support element 16. When taking the maintenance position or the first pivoting angle position 21, the filter element 9 continues to hang on the support member 16 after the filter element 9 is retained by means of the hook-shaped extension 17 and is secured against falling into the dirty air chamber 7. The hook-shaped extension 17 allows a pivotable tilting or rotation of the filter element 9 relative to the dirty air chamber 7, after the filter element 9 about its rod or about its bolt-like coupling element 18 is rotated or tilted. When taking the maintenance or replacement position, in particular the first pivoting angle position 21, the filter element 9 within the dirty air chamber 7 quasi free-floating but suspended on the support member 16 and can be particularly easy and comfortable posted by an operator or by a maintenance person and then from the Housing 2 are removed. In the operational, second pivot position 22, however, the filter element 9 is pressed firmly or sealingly against the partition 6 and against a mounting flange to prevent bypass air flows against the filter element 9.

As best seen in a synopsis of Fig. 2 and Fig. 3, the support member 16 is provided with an adjusting device 23, which can also be referred to as tool-operated quick-release device provided or coupled. In particular, the support element 16 is in motion connection with a threaded spindle arrangement 24 or a traveling nut arrangement for the relative adjustment of the support element 16 relative to the housing 2. The adjusting device 23, which is preferably operated without tools, may alternatively be formed by quick-release devices, for example by clamping lever arrangements or by Exzenterhebelspanner. The adjusting device 23 is provided in any case for generating a sufficient contact force of the filter element 9 against the partition 6 or 9/25 Austrian Patent Office AT505 674B1 2010-03-15 against an adequate mounting or sealing surface in the housing 2. The adjusting device 23 is designed such that an elastically flexible sealing element 25 -Fig. 1 - on the filter element 9, in particular on the upper end plate 26, dustproof against the partition wall 6 or against a corresponding sealing surface, which is formed for example as a mounting flange within the housing 2, can be pressed.

As further best seen from a combination of FIGS. 2 to 4, it is advantageous if the support element 16 for the filter element 9 at the same time forms a feed channel 27 for supplying cleaning compressed air into the interior of a filter element 9 designed as a hollow cylinder 19 and / or holds. In the illustrated embodiment, the feed channel 27 for cleaning compressed air for periodic or demand-controlled cleaning of the filter element 9 is formed by particles adhering thereto by a hollow profile-like portion of the support member 16. In addition, adjoining these hollow profile-like, in particular tubular portion of the support member 16 is a flexible or variable length, for example, a telescopic connecting channel 28, which allows a pivoting movement of the support member 16 about the pivot bearing 20 without dismantling, in particular coupling and Abkoppelvorgänge with respect to a Supply line 29 for cleaning compressed air are required. The supply line 29 for cleaning compressed air is preferably connected to a reservoir 30, in particular to a pressure accumulator for receiving compressed air. The reservoir 30 is also preferably positioned within the housing 2. Within the supply line 29 into the interior of the hollow cylindrical filter element 9 is a controllable valve 31, in particular a solenoid valve, for controllable, in particular for timed, demand-controlled and / or manually activated cleaning of the filter element 9 by targeted supply of cleaning compressed air from the reservoir 30 into the interior the filter element 9 is provided. The support element 16 or its hollow profile has at least one outlet opening, via which the supplied cleaning compressed air is selectively guided into the interior of the filter element 9 and flows against the inner surfaces of the hollow cylindrical filter element 9. The reservoir 30 is preferably connected to a compressed air supply system, as is customary in industrial work environments, connectable.

As best seen in FIGS. 3 and 4 can be seen, comprises the automatically building, conductive connection of the filter element 9 to ground potential, in particular with respect to the housing 2 of the filtering device 1, an electrically conductive conductor 13 as an electrical connection between the surfaces The automatic or mandatory structure of this electrical connection is carried out via the coupling device 12, in particular during operational or operationally ready attachment of the filter element 9 within the housing 2. Das means that when attaching or mounting the filter element 9 forcibly also the electrical connection of the filter element 9 is performed with ground potential, so there is always a potential equalization of the air or particle flow around the filter element 9 to earth.

This electrical conductor 13 is formed at least within a load or force transmission zone 32 between the filter element 9 and the coupling device 12. In particular, at least one electrical conductor 13 extends at least until the power transmission zone 32 between the first and the second coupling member 14, 15. The electrical conductor 13, which is designed for example as an electrical contact plate or may have such a contact plate, provides an intimate electrical contact between the Filter element 9, in particular between the coupling member 15, and the coupling device 12, in particular its coupling member 14 safe.

The electrical conductor 13 may be formed by a sheet metal strip 33, in particular by a copper sheet strip. This electrically conductive sheet metal strip 33 extends at least within the power transmission zone 32 between the first and the second coupling member 14, 15. Preferably, the sheet metal strip 33, in particular a copper sheet strip, attached to the first coupling member 14 and extending from the power transmission zone 32 at least in the proximity of the support element 16 or preferably to 10/25 Austrian Patent Office AT505 674B1 2010-03-15 to the support member 16 and contacted this electrically conductive. It is useful if the sheet metal strip 33, the load receiving portion, in particular the hook-shaped extension 17 of the first coupling member 14 at least partially lined or lined. As a result, a long-term reliable or contact-safe electrical connection between the filter element 9 and the normally grounded housing 2 is ensured or achieved, without the operator or maintenance personnel having to carry out separate or separate grounding measures. In particular, the attachment of a grounding strap on the filter element 9 is not required. In the embodiment according to the invention, the dissipation of electrostatic charges or surface charges of the filter element 9 with respect to ground is ensured even under the prevailing adverse conditions within the filtering device 1. The handling or operation of the filtering device 1 when changing the filter elements designed as filter cartridges 9 also becomes significantly fail-safe and comfortable. In particular, a newly inserted filter element 9 for the filtering device 1 is merely to be suspended in the hook-shaped extension 17. Then, the filter element 9 via the support member 16 in the vertical direction comfortably in its ready position -Schwenkwinkelstellung 22 - are transferred, as shown in FIG. 2 can be removed. Similarly, a dirty or standing at the end of its life or operability filter element 9 can be lowered via the support member 16 in the vertical direction and in a removal position - pivot angle position 21 - transferred, as indicated in Fig. 2 with dotted lines. In this removal position then easy and comfortable removal of the exchanged filter element 9 is made possible. The rod-like coupling element 18 on the filter element 9, which can be displaced into and out of engagement with the hook-shaped extension 17, is preferably positioned within a cavity 34 of a filter element 9 designed as a hollow cylinder 19. That is, the hook-shaped extension 17 protrudes into the inner portion, in particular into the cavity 34 of a filter element 9 when the filter element 9 is received. For this purpose, the hook-shaped extension 17 extends from the bottom of the support member 16 in the vertical direction down to the upper end portion of the dirty air chamber 7. The filter element 9 is supported starting from the clean air chamber 8 via the downwardly projecting hook-shaped extension 17. This ensures that the coupling device 12, in particular its support element 16 and its hook-shaped extension 17 and the electrical conductor 13, are better protected against contamination, in particular against attachment or adhesion of deposited particles. The filter element 9 can also have an oval hollow cylindrical cross-sectional shape, wherein the rod-like coupling element 18 extends in a bridge-like manner between the closest side walls of a filter element 9 of oval cross-section.

The filtering device 1 further comprises a collecting device 35 for receiving particles or dusts filtered from the supplied air flow. This collecting device 35 is arranged in the lower end portion of the housing 2 or within the dirty air chamber 7, in particular below the filter elements 9. This ensures that particles falling off from the filter element 9 can be absorbed by the collecting device 35 by the action of gravity. Preferably, the bottom or the bottom portion of the dirty air chamber 7 is formed by a funnel-like sump 36 whose funnel-shaped narrowed outlet opening of the collecting device 35 is assigned, so that in the sump 36 incoming particles of a receiving opening 37 in the upper end of the collecting device 35 are supplied. This collecting device 35 comprises at least one container for receiving deposited particles, in particular powder-like dusts or the like. These particles or dusts are continuously accumulated in the collecting device 35 during the ongoing operation of the filtering device 1.

The collecting device 35 in this case comprises a disposable collecting container 38, which is preferably formed of electrically conductive plastic. In this disposable collecting container 38, the particles separated from the air flow are taken up. This disposable collection container 38 is easily and quickly removed from the collection device 35 and replaced by a new or empty disposable collection container 38. Upon reaching the upper 1150th Austrian Patent Office AT505 674B1 2010-03-15 or maximum level with separated particles so the disposable collection container 38 can be removed from the collection device 35 and in a simple manner by an empty or new disposable collection container 38 are replaced, so that the operation of the filtering device 1 as possible without interruption or with the shortest possible delays can be resumed. The disposable collection container 38 made of electrically conductive plastic and the particles accumulated therein can then be supplied to a common or separate disposal or recycling.

The replaceable disposable collecting container 38 of the collecting device 35 is connected via at least one electrically conductive contact point 39 with the collecting device 35 electrically conductive. This electrically conductive contacting point 39 between the disposable collecting container 38 and the collecting device 35 is provided for transmitting electrostatic charges or charges starting from a disposable collecting container 38 to the housing 2 of the filtering device 1. As a result, electrostatic charges of the disposable collection container 38 are diverted to ground or ground potential. Electrostatic charges of the disposable collection container 38, which may cause personal injury and may represent a risk of fire or explosion, are thus reliably and completely avoided. Such electrostatic charges are in particular caused by the fact that the flow of air and the particle flows around the filter element 9 or around the disposable collection container 35 and / or within the disposable collection container 35 generates a static electricity, which in the medium term to a high potential difference between the filter element or the one-way collection container 35 and the housing 2 or would lead to the environment. Such potential differences and associated electrostatic discharges are avoided by electrical connections, in particular by electrically conductive contacting points 39 between the disposable collecting container 38 and the collecting device 35 or by an electrical connection to the housing 2 and the ground connected thereto from the beginning.

The replaceable disposable collection container 38 is preferably formed by a bag or bag 40 made of electrically conductive plastic. This bag 40 is held in the collecting device 35 and received such that particles falling down by gravity in this bag 40 are taken as dust-free or loss-free as possible. Economical or cost, it is when the bag 40 is designed as a simple bag having two side walls, which are connected to at least three edge-side sections. The remaining or fourth, in particular the upper edge portion of this bag forms a receiving opening, can enter via the particles to be collected in the bag or sack 40 th.

An advantageous embodiment of the collecting device 35 is illustrated in FIGS. 5 to 12. This collecting device 35 for separated particles, in particular for powdery dusts, comprises a cup-shaped or hollow cylindrical holding element 41 for the disposable collecting container 38, in particular for the inherently unstable bag 40. The longitudinal center axis or cylinder axis of the holding element 41 preferably extends vertically, wherein an interior 42 of the preferably hollow cylindrical or cup-shaped holding element 41 is provided for receiving the disposable collecting container 38. In particular, the internal dimensions of the interior 42 of the holding element 41 are approximately adapted to the dimensions of a fully unfolded or completely filled bag 40, so that the bag 40 via its outside at least partially surrounding retaining element 41 is at least partially supported.

The pot-shaped or hollow cylindrical retaining element 41 is advantageously not necessarily dustproof execute, but can in the holding element 41 and individual breakthroughs, eg. For inspection of the level of the bag 40 and for sensory detection of the level of the bag 40th be trained. The dust or particle density of the collecting device 35 is ensured above all by a bag 40 inserted therein. The hollow cylindrical or cup-shaped holding element 41 is further designed such that its upper edge portion 43 is suitable for slipping over a bag-like disposable collection container 38. In particular, the upper edge portion 43 is designed such that the upper wall portions can be slipped over the upper edge portion 43 of the retaining element 41 around the bag opening. Preferably, an elastically yielding, in particular an elastomeric sealing element 44 is formed in the upper edge section 43 of the retaining element 41. This sealing element 44 extends continuously over the entire upper boundary edge of the retaining element 41 and is thus preferably designed circular closed. The upper, peripheral edge of the bag-like disposable collecting container 38 is preferably placed over this elastomeric sealing element 44 in order to ensure a receptive positioning or holding of the bag 40.

Preferably, the collecting device 35 also comprises a cover element 45. This cover element 45 is intended to press against the upper edge portion 43 of the hollow cylindrical or pot-shaped holding element 41. In particular, a bottom 46 of the cover element 45 is provided to exert a resilient bias on the upper edge portion 43, in particular on the sealing element 44.

The cover element 45 has at least one opening 47, via which an entry of separated particles into the bag-like disposable collection container 38 is made possible. A size of the opening 47 corresponds approximately to the size of the receiving opening of the holding element 41 and the bag 40 inserted therein.

The lid member 45, which serves, inter alia, for holding or fixing the bag 40 relative to the holding element 41, is carried out in accordance with an embodiment of the invention electrically conductive. Preferably, the lid member 45 is made galvanized to ensure long-term proper electrical connection between the bag 40 and the collecting device 35 and the housing 2 of the filtering device 1. In particular, this prevents rust formation and thus ensures the long-term electrical conductivity of the cover element 45 or the electrical connection to ground potential. After the bag-like disposable collection container 38 is pressed in the ready-to-use state by the lid member 45 against the upper edge portion 43 of the holding member 41, there is a good electrical connection between the bag-like disposable collecting container 38 and the collecting device 35 and the housing 2 of the filtering device 1. In particular the galvanized cover element 45 presses the electrically conductive bag 40 particularly intimately and over a sufficiently large contacting surface against the elastomeric sealing element 44 at the upper edge section 43 of the retaining element 41.

The cover element 45 is preferably connected via a flexible electrical line connection 48, in particular via a so-called antistatic strip, to the metallic holding element 41 or to the metallic collecting device 35. In addition, the metallic collecting device 35 or the holding device 41 is connected to the housing 2 via a further electrical line connection 49. The housing 2 is secured by the housing 2 contained in the housing 2 or built on the housing 2 electrical control device of the filtering device 1 connected to ground potential.

In order to achieve a continuous bias of the lid member 45 relative to the holding member 41, a clamping device 50 is formed. In particular, at least one tension lock 51 is provided with which the cover element 45 can be tensioned against the upper edge or against the upper edge section 43 of the retaining element 41. Among other things, a slip-proof or position-stable clamping of the bag 40 between the cover element 45 and the holding element 41 is achieved via this tensioning device 50 or via the at least one tension lock 51.

Preferably, the hollow cylindrical or cup-shaped holding element 41 is held in a cuboid receiving box 52. The cover element 45 is preferably mounted pivotably in the upper edge portion of this cuboid receiving box 52. Alternatively, it is also possible to store the cover element 45 on the hollow-cylindrical or cup-shaped retaining element 41.

The receiving box 52 for the holding member 41 is inserted into the dirty air chamber 7 or below the dirty air chamber 7 in the housing 2 and if necessary removed from the dirty air chamber 7, in particular from the housing 2 pulled out or removable. For this purpose, a rolling or guiding device 53 is formed in order to allow the smoothest possible relative adjustment between the receiving box 52 and the housing 2 of the filtering device 1, as was exemplified in Fig. 1.

In the embodiment shown, the receiving box 52 for the holding element 41 via the electrical line connection 49 to the housing 2 of the filtering device 1 is electrically connected. The length of this electrical line connection 49 is chosen such that when removing the collecting device 35 from the housing 2, the line connection 49 can remain connected and does not have to be disconnected. This ensures that the pot-shaped or cylindrical holding element 41 or the collecting device 35, which can be removed from the housing 2 as required, always remains connected to the housing 2. In particular, the electrical line connection 49 between the collecting device 35 and the housing 2 is not intended for a separation by operating or maintenance personnel and thus quasi fixed and basically inseparably connected to the housing 2.

The cup-shaped holding element 41 is preferably designed as a hollow cylinder in order to achieve an efficient receiving volume for a preferably bag-like disposable collecting container 38. Optionally, it is also possible to perform the holding element 41 in cross-section polygonal. This is especially true when the disposable collection container 38 to be used therein also has a polygonal receiving cross-section.

The filtering device 1 preferably comprises at least one vacuum generator 54, in particular a vacuum blower, as has been exemplified in FIGS. 1 and 2. This vacuum generator 54 is preferably disposed within the housing 2, in particular in the clean air chamber 8. Via this vacuum generator 54, the raw gas to be cleaned can be sucked and sucked through the dirty air chamber 8 or through the at least one filter element 9 and subsequently into the clean air chamber 7. Starting from the clean air chamber 7, the purified air may possibly escape into the environment or be discharged more widely. In addition, the filtering device 1 can of course also contain any known from the prior art or shown in Fig. 1 barrier flaps, slide elements, trim elements, door assemblies and the like ..

The illustrated embodiments show possible embodiments of the filtering device 1 and its technical components, it being noted at this point that the invention is not limited to the specifically illustrated embodiments, the sake of order, it should finally be pointed out that for a better understanding of Structure of the filtering device 1 whose components have been shown partially uneven and / or enlarged and / or reduced.

Above all, the individual in FIGS. 1; 2-4; 5-12 embodiments form the subject of independent solutions according to the invention. 14/25

Claims (28)

Austrian Patent Office AT505 674B1 2010-03-15 REFERENCE MARKETING 1 Filtering device 2 Housing 3 Air inlet opening 4 Air outlet opening 5 Paneling element 6 Partition wall 7 Dirt-air chamber 8 Clean-air chamber 9 Filter element 10 Filter medium 11 Breakthrough 12 Coupling device 13 Electrical conductor 14 First coupling element 15 Second coupling element 16 Support element 17 Hook-shaped extension 18 Rod-like Coupling element 19 hollow cylinder 20 pivot bearing 21 first pivot angle position 22 second pivot angle position 23 actuator 24 threaded spindle assembly 25 sealing element 26 end plate 27 feed channel 28 connecting channel 29 supply line 30 reservoir 31 valve 32 power transmission zone 33 sheet metal strip 34 cavity 35 collecting device 36 funnel-like sump 37 receiving opening 38 disposable collection container 39 conductive contacting 40th Sack 41 retaining element 42 interior 43 upper edge of the ex itt 44 sealing element 45 cover element 46 underside 47 opening 48 electr. Line connection 49 electr. Line connection 50 Tensioning device 51 Tensioning lock 52 Receiving box 53 Rolling or guiding device 54 Vacuum generator Patent claims 1. Filtering device (1) for filtering particle-laden air streams, comprising a housing (2) with an air inlet opening (3) for contaminated air, an air outlet opening (4) for filtered air, a partition wall (6) which divides the housing (2) into a dirty air chamber (7) and a clean air chamber (8), a filter element (9) whose filter medium (10) projects into the dirty air chamber (7) and a filtering air flow connection between the dirty air chamber (7) and the clean air chamber (8) builds up, and a coupling device (12) for interchangeable support of the filter element (9) in the housing (2), which coupling device (12) at least one electrical conductor (13) or at least partially made of an electrically conductive material and for the transmission of electro static charges starting from the filter element (9) on the housing (2) and thus designed for dissipation from earth potential, wherein the coupling device (12) a first coupling member (14) which on a support member (16) for the filter element (9) is, and a second coupling member (15), which is arranged on the filter element (9), characterized in that the first coupling member (14) has a hook-shaped extension (17 ), which is designed for engaging behind the second coupling member (15), and the second coupling member (15) by a rod-like coupling element (18) is formed which extends like a bridge between opposite walls of a hollow cylinder (19) designed as a filter element (9) , 2. Filtering device according to claim 1, characterized in that the support element (16) in the housing (2), in particular in the clean air chamber (8), is pivotally mounted and within its pivoting angle range in a first pivot angle position (21) for removing the filter element (9 ) from the housing (2) and in a second pivoting angle position (22) for operational or operational positioning of the filter element (9) within the housing (2) can be transferred. 3. Filtering device according to claim 1, characterized in that the support element (16) with an adjusting device (23), in particular a threaded spindle assembly (24) or a traveling nut arrangement, for relative displacement of the support element (16) relative to the housing (2) is in communication. 4. Filtering device according to claim 3, characterized in that the adjusting device (23) for generating a contact force of the filter element (9) against the partition wall (6) or a connection sealing surface in the housing (2) is formed such that an elastically resilient sealing element (25 ) on the filter element (9) dustproof to the partition wall (6) or against the connection sealing surface in the housing (2) can be pressed. 5. Filtering device according to claim 1, characterized in that the support element (16) forms a supply channel (27) for supplying cleaning compressed air into the interior of a hollow cylinder (19) designed as a filter element (9) and / or supports. 6. Filtering device according to one of the preceding claims, characterized in that the electrical conductor (13) extends at least into a power transmission zone (32) between the first and the second coupling member (14, 15) or at least formed within this power transmission zone (32) is. 7. Filtering device according to one of the preceding claims, characterized in that the electrical conductor (13) by a metal strip (33), in particular by a copper sheet strip, formed at least within a power transmission zone (32) between the first and second coupling member (13). 14, 15). 8. Filtering device according to claim 7, characterized in that the sheet metal strip (33), in particular the copper sheet strip, on the first coupling member (14) is fixed and extending from the power transmission zone (32) to the support element (16). 9. Filtering device according to claim 7, characterized in that the sheet metal strip (33) at least partially lines a hook-shaped load receiving portion of the first coupling member (14). 10. Filtering device according to claim 1, characterized in that in the hook-shaped extension (17) a filter element (9) can be suspended and that the filter element (9) via the support element (16) in the vertical direction in a removal position lowered and in the vertical direction in an operational position is mounted liftable. 11. Filtering device according to claim 1, characterized in that the rod-like coupling element (18) within the cavity (34) of a hollow cylinder (19) designed as a filter element (9) is positioned. 12. Filtering device according to claim 1, characterized in that the hook-shaped extension (17), starting from the underside of the support element (16) extends in the vertical direction downwards and extends into the upper end region of the dirty air chamber (7). 16/25 Austrian Patent Office AT505 674B1 2010-03-15 13. Filtering device (1) for filtering particle-laden air streams, comprising a housing (2) with an air inlet opening (3) for contaminated air, an air outlet opening (4) for filtered air, a partition wall (6), the housing (2 ) into a dirty air chamber (7) and into a clean air chamber (8), a filter element (9) whose filter medium (10) projects into the dirty air chamber (7) and a filtering air flow connection between the dirty air chamber (7) and the clean air chamber (8) and a collecting device (35) for receiving particles filtered from the air stream, characterized in that the collecting device (35) comprises a disposable collecting container (38) of electrically conductive material, in particular of electrically conductive plastic, which disposable collecting container (38) is electrically conductively connected to the collecting device (35) via at least one electrically conductive contacting point (39) and to the extender tion electrostatic charges starting from the disposable collection container (38) on the collecting device (35) and on the housing (2) and thus for discharging electrostatic charges of the disposable collecting container (38) is formed with respect to ground potential. 14. Filtering device according to claim 13, characterized in that the disposable collecting container (38) is formed by a bag (40) made of electrically conductive plastic. 15. Filtering device according to claim 14, characterized in that the bag (40) is designed as a bag with two side walls, which are dust-tightly connected to each other at three edge portions and the fourth edge portion forms a receiving opening for particles to be collected. 16. Filtering device according to one of claims 13 to 15, characterized in that the collecting device (35) comprises a cup-shaped or hollow cylindrical retaining element (41) for the disposable collecting container (38). 17. Filtering device according to claim 16, characterized in that an inner space (42) of the hollow cylindrical or pot-shaped holding element (41) for receiving a disposable collecting container (38) is provided. 18. Filtering device according to claim 16, characterized in that an upper edge portion (43) of the holding element (41) for slipping over a bag-like disposable collecting container (38) is formed. 19. Filtering device according to claim 16, characterized in that in the upper edge portion (43) of the hollow cylindrical or cup-shaped holding element (41) an elastically yielding, in particular an elastomeric, sealing element (44) is arranged. 20. Filtering device according to claim 16, characterized in that a cover element (45) is formed, which against the upper edge portion (43) of the hollow cylindrical or pot-shaped holding element (41) can be pressed. 21. Filtering device according to claim 20, characterized in that the cover element (45) has an opening (47) for the entry of filtered-out particles in a bag-like disposable collecting container (38). 22. Filtering device according to claim 20, characterized in that the cover element (45) is designed to be electrically conductive and a bag-like disposable collecting container (38) in the hollow cylindrical or pot-shaped holding element (41) against the upper edge portion, in particular against an elastically resilient sealing element ( 44) in the upper edge portion (43) of the holding element (41) presses. 23. Filtering device according to claim 20, characterized in that a clamping device (50), in particular at least one clamping closure (51) is formed, which for the mechanical bias of the cover element (45) relative to the upper edge portion (43) of the hollow cylindrical or pot-shaped holding element (41) is provided. 17/25 Austrian Patent Office AT505 674B1 2010-03-15 24. Filtering device according to claim 16, characterized in that the hollow cylindrical or cup-shaped holding element (41) in a cuboid receiving box (52) is supported and a cover member (45) is pivotally mounted at the upper edge of the cuboid receiving box (52). 25. Filtering device according to claim 24, characterized in that the receiving box (52) in the lower end of the dirty air chamber (7) is supported and by means of a rolling or guiding device (53) relative to the dirty air chamber (7), if necessary removed, in particular from this retractable, is stored. 26. Filtering device according to claim 24, characterized in that the receiving box (52) via an electrical line connection (49) to the housing (2) is connected. 27. Filtering device according to claim 24, characterized in that the cover element (45) via an electrical line connection (48) with the receiving box (52) is connected. 28. Filterangseinrichtung according to claim 16, characterized in that the cup-shaped or hollow cylindrical retaining element (41) via a flexibly deformable electrical line connection (49) fixed and inseparable from the housing (2) is connected. For this 7 sheets drawings 18/25