EP2524739B1 - Filter device for filtering the air of a room, in particular for renovation work in buildings - Google Patents

Description

Technical area

The invention relates to a filter device for room air filtration according to the preamble of claim 1.

Such air cleaners for building renovation or other applications provide a dust-free air, for example, during a conversion phase. The air circulates through a filter, collecting the harmful dust contained in the air and cleaning the room air.

State of the art

From the company brochure, for example DC AirCube 2000 from Dustcontrol ^® , an air cleaner for renovation work is known, which is designed as a filter car and has an air intake. For a vacuum build-up in sealed rooms, a 250mm vent hose can be used on the exhaust side. This device can be used as a negative pressure device.

Devices are also known in which a suction hose can be connected. The suction hose can be led to a workstation where the dust or contaminated air is produced.

From the DE 10 2008 013 383 A1 is a plant for cleaning microbially contaminated buildings known. In this case, at least one refurbishment blower with a diameter of 500 mm and an air flow of at least 10,000 m ³ per blower and hour is used. The rehabilitation blower is operated in the overpressure or underpressure process. The contaminated air is conveyed either directly or through a rehabilitator upstream particulate filter, namely a so-called HEPA filter (High Efficiency Particulate Air Filter) to the outside.

DESCRIPTION OF THE INVENTION: Problem, Solution, Advantages

The invention has for its object to provide a filter device that combines different applications in a single device.

This object is achieved by a filter device with the characterizing features of claim 1 in combination with its generic features.

In a basic state of the device according to the invention or the filter device are several, preferably three sides open to the air intake. The air is preferably sucked through coarse filter surfaces in the device in a main filter. In this mode, the device is used for air purification in the room.

In addition, however, the filter device according to the invention offers at least one further working mode. If necessary, e.g. all three sides with e.g. close plug-in cover plates or adapter plates. Two of these cover plates are (at least partially) provided with hose connections. The cover plates for the intake hoses have a corresponding air inlet opening. These are quasi designed as adapter plates. For a required pressure build-up, the third side is covered with a closed cover plate.

Instead of connecting two hoses, only one suction hose can be connected to one side. The other two sides are closed with cover plates.

The hoses to be connected can be led to the workplace in the room, where it can be sucked off. A dust extraction at the workplace is much more efficient than just pure room air filtration. In the mode "with hose connection for workplace extraction" then the other sides (one or two) of the device must be completely closed, so that enough suction builds up in the hoses. After the work has been completed, the device can be firmly sealed with all three cover plates (each without hose nozzle) so that no dust escapes.

With the filter device, various functions can be realized with a single device.

The various functions can be realized in that at one or more air inlet sides, a detachable adapter plate, such as a cover plate with an opening or with a connection for a suction hose or a detachable cover plate (eg cover plate) can be fastened, such that at one or more air inlet sides optionally a free one Air intake is possible when the adapter plate or cover plate is not mounted, or it can be suctioned through a suction hose with the adapter plate mounted.

Further, according to the invention, two opposite air outlet openings are provided on the housing. These ensure a uniform and effective air flow. If one of the air outlet openings of the housing is covered, then the discharge hose is connected in an L-shape.

The interchangeable side walls - once closed, once with hose connection - have created the possibility of both functions, i. free air filtration and hose suction to comply with a device.

The filter device according to the invention is suitable for example for the separation of fine and hazardous dust up to a size of about 0.3 microns. This particle size is e.g. fumed silica contained in concrete, bricks or mortar.

The air filter can be used for work such as demolition, wall grinding, concrete grinding, kitchen renovation or bathroom renovation.

Further advantageous embodiments of the invention are characterized in the subclaims.

In an advantageous development of the device according to the invention, it is provided that a discharge hose can be connected to at least one air outlet opening. With this blow-out hose, an additional vacuum function can be realized. The negative pressure allows fresh air to enter a room with the purged air coming out of the room in a clean condition. The fresh air significantly improves the indoor climate.

A solution for the flexible application of the vacuum function is created by the fact that two opposite air outlet openings are present. Preferably, at least one outlet hose can be connected. It is optionally available at all two air outlet openings a Ausblasschlauch or only at an air outlet opening a Ausblasschlauch available. The other air outlet opening is then covered by a closure element when connecting a single exhaust hose. Through several hoses several air outlet points, eg two windows, can be used simultaneously. Alternatively, only one hose can be used to use only one window. Instead of one or more windows, doors can also be used.

A particularly preferred development of the invention is characterized in that a coarse filter or prefilter can be fastened to each air inlet side. This filter can be used both for suction through a suction hose and for a free intake, ie directly into the housing. This coarse filter or pre-filter significantly prolongs the life of the HEPA filter. The coarse or prefilter preferably has a filter holder with a grid structure and a downstream filter plate in the flow direction. Thus, the filter effect is improved by temporally constant air volume through different filters for different particle sizes. The fine filter or microfilter (HEPA filter) is arranged in the housing and is designed like a hollow cylinder. Due to the filter plates in combination with the cylindrical shape, relatively large filter surfaces can be realized with compact device dimensions. Each coarse filter may have, for example, an area of 0.5 m ² - 1.2 m ² , wherein the microfilter (HEPA filter) has a total filter area of 5 m ² to 15 m ² .

In a further advantageous embodiment of the invention, the housing is provided with a total of three air inlet sides. The filter sides are eg walls of a filter box and can be used variably. All three sides can be used for free or direct filtering. Alternatively, only one side for Schlauchabsaugung be used, the hose is led to the workplace, for example in the vicinity of a grinder. With a hose, the other sides are closed. Alternatively, however, two sides can be provided with a hose. Then only one side is closed. In principle, even all three sides could be provided with a hose. Thus, it is expedient that on the housing optionally only an adapter plate with a suction hose is fastened, while the other two air inlet sides are provided with cover plates, and that on the housing optionally two of the three air inlet sides can be provided with an adapter plate with suction hose while the third air inlet side is provided with a cover plate, but also an adapter plate or a cover plate can not be attached to either side, so that all three sides can be selected as free intake sides.

In order to simplify the transport from one job to another job, the filter device is designed as a filter car.

A particularly preferred embodiment of the invention is characterized in that the housing comprises a box-shaped filter chamber in which a dust filter can be fastened, wherein a plurality of wall sides of the filter chamber form the air inlet sides, and that over the filter chamber, a housing hood is arranged, which is designed like a lid, to release the filter chamber, wherein the two opposite air outlet openings are arranged on the housing cover.

On the one hand, the box-like construction provides optimum accommodation of the components, and the filters can be exchanged or cleaned in a simple and convenient manner.

Brief description of the drawings

An embodiment will be explained in more detail with reference to the drawings, wherein further advantageous developments of the invention and advantages thereof are described.

• Fig. 1 eine erste perspektivische Darstellung der Filtervorrichtung im freien Saugmodus,
• Fig. 2 eine zweite perspektivische Darstellung der Filtervorrichtung im freien Saugmodus,
• Fig. 3 eine perspektivische Explosionsdarstellung der Filtervorrichtung,
• Fig. 4 eine Explosionsdarstellung der Filtervorrichtung von der Seite gesehen,
• Fig. 5 eine perspektivische Darstellung der Filtervorrichtung im Schlauch-Saugmodus,
• Fig. 6 eine perspektivische Darstellung der Filtervorrichtung im Unterdruckmodus,
• Fig. 7 eine Seitendarstellung der Filtervorrichtung im Unterdruckmodus,
• Fig. 8 eine perspektivische Darstellung der Filtervorrichtung im Schlauch-Saugmodus und Unterdruckmodus,
• Fig. 9 eine erste perspektivische Darstellung der Filtervorrichtung im Transportmodus
• Fig. 10 eine Darstellung der Filtervorrichtung von unten gesehen,
• Fig. 11 eine Darstellung der Filtervorrichtung von einer Seite gesehen,
• Fig. 12 eine Darstellung der Filtervorrichtung von der Frontseite gesehen, und
• Fig. 13 eine zweite perspektivische Darstellung der Filtervorrichtung im Transportmodus.

Show it:

• Fig. 1 a first perspective view of the filter device in the free suction mode,
• Fig. 2 a second perspective view of the filter device in the free suction mode,
• Fig. 3 an exploded perspective view of the filter device,
• Fig. 4 an exploded view of the filter device seen from the side,
• Fig. 5 a perspective view of the filter device in the hose suction mode,
• Fig. 6 a perspective view of the filter device in the vacuum mode,
• Fig. 7 a side view of the filter device in the vacuum mode,
• Fig. 8 a perspective view of the filter device in the hose suction mode and vacuum mode,
• Fig. 9 a first perspective view of the filter device in the transport mode
• Fig. 10 an illustration of the filter device seen from below,
• Fig. 11 an illustration of the filter device seen from one side,
• Fig. 12 an illustration of the filter device seen from the front, and
• Fig. 13 a second perspective view of the filter device in the transport mode.

In the figures, like parts are given the same reference numerals.

Preferred embodiment of the invention

The Figures 1 and 2 show from different perspectives a filter device 100 for room air filtration for renovation work in buildings.

The filter device 100 includes a housing 10 in which a dust filter 11 is disposed, as in FIG Fig. 3 is shown. The filter 11 is a fine filter, namely a hollow cylindrical HEPA filter. The filter is arranged in a box-shaped filter chamber 12 of the housing 11 or is fastened there. The filter chamber 12 is delimited by four wall sides 13 to 16, which in the Fig. 10 Marked are. The wall side 13 is a closed rear side, whereas the sides 14 to 16 are filter sides. The wall sides 14 to 16 of the filter chamber 12 form air inlet sides. These comprise a window-like frame 17, which forms an opening 18. Each of the three openings 18 can be covered by a coarse filter 19. Fig. 1 shows that the filter 19 has been removed from the side 15 and that the coarse filter is mounted on the side 16.

The filter 19 comprises a filter holder 20, in which a filter plate 21 is inserted, as the Figures 1 and 2 illustrate. The filter holder 20 has a lattice structure, wherein the filter plate 21 lies downstream in the flow direction.

About the filter chamber 12, a housing cover 22 is arranged, which in the FIGS. 3 and 4 is shown exploded. The housing cover 22 is removable and / or hinged. That is, the housing cover 22 is designed lid-like, to release the filter chamber 12. In open state ( Fig. 3, Fig. 4 ), the fine filter 11 can be removed through a filter opening 25 of the housing 10.

On the housing cover 22, two air outlet openings 26, 27 are arranged. An air outlet opening 26 is eg in Fig. 3 to see while the other air outlet opening 27 eg in Fig. 5 is shown.

In the area of the housing cover 22, a fan or blower is housed. On an outer front 28, the example in Fig. 3 is shown, control and / or display elements are mounted to switch eg different fan stages or to realize a level indicator or filter change indicator.

The device 100 thus comprises a HEPA filter and a fan for dust extraction, wherein the housing is provided with a plurality of air inlet sides or wall sides 14 to 16 and two air outlet openings 26, 27 for blowing out the sucked into the housing 10 by the fan air. The fan generates a negative pressure on each air outlet side.

According to the invention, one or more air inlet sides or wall sides 14 to 16 have a detachable adapter plate 29 or 30 (cf. Fig. 3 . Fig. 5 ) for a suction hose 31 or 32 or a detachable cover plate 33, 34 or 35 fastened (see. Fig. 3 . Fig. 9 . Fig. 13 ), so that at one or more air inlet sides optionally a free air intake at not mounted adapter plate 29, 30 or cover plate 33, 34, 35 (see. Fig. 1 and Fig. 2 ) or suction through a suction hose 31 or 32 with mounted adapter plate 29, 30 is possible.

In Fig. 1 a first mode of operation is shown, in which the filter device with only the filters 19 on all three sides 14, 15, 16 (see. Fig. 10 ) Is provided. There is thus a free air intake at not mounted adapter plate 29, 30 or cover plate 33 - 35 shown.

Fig. 5 shows a second mode of operation in which two tubes 31, 32 are connected to the housing 10. These suction hoses 31, 32 are led to a workstation, where the dust to be sucked off, eg as a result of grinding work, arises. For this mode, the adapter plates 29, 30 are simply attached via the filters 19. The adapter plates 29, 30 are detachable and expediently provided with a handle 36, 37 ( Fig. 3 ). To generate the required negative pressure, it is necessary to cover the third side. This is done with the cover plate eg 30. In Fig. 3 It is shown how the front side is closed with the cover plate 34. Because the adapter plates 29, 30 are above the filter 19, the filter effect of the coarse filter is maintained.

Not shown, but it is possible to connect only a single hose, on the side 14, 15 or 16. In this case, the other sides are covered by cover plates.

Each adapter plate 29, 30 consists of a metal plate which lies in or on the frame. The sheet metal plate has a e.g. circular opening 40 which carries an adapter ring 41, on which the tube 31, 32 can be inserted. The adapter ring 41 may be used together with the tube 31, 32 via a positive and / or non-positive connection, e.g. a screw or bayonet connection to be attached to the housing.

Corresponding adapter rings can also be used for the openings 26, 27, as Fig. 3 shows.

On the housing 10 is thus optionally only one adapter plate, for example, 30 with a suction hose 31 fastened, while the other two air inlet sides are provided with cover plates 33, 34. Optionally two of the three air inlet sides with an adapter plate 29, 30 with suction hose 31, 32 can be provided on the housing 10, while the third air inlet side is provided with a cover plate 34. As Fig. 1 shows, but can not be attached to either side of an adapter plate 29, 30 or a cover plate 33, 34.

The FIGS. 6 and 7 illustrate that at least one air outlet opening 26, 27, a blow-out 42 is connected. There are two opposite air outlet openings 26, 27 are present, wherein at each air outlet opening 26, 27, a blow-out 42 is connected. So it can be two Ausblasschläuche 42, 43, as Fig. 8 shows, to be connected. However, it is also possible for only one outlet hose 42 to be connected to an opening, for example, 26, in which case the other air outlet opening, for example, 27, can be connected by a closure element 44 which is in Fig. 9 shown can be covered.

Thus, it can optionally be present at both air outlet openings 26, 27 blow-out hoses 42, 43 or it may be present only at an air outlet opening a blow-42.

• Freie Lufteinsaugung und freie Luftausblasung gemäß Fig. 1.
• Lufteinsaugung mit einem oder mehreren Schläuchen und freie Luftausblasung gemäß Fig. 5.
• Freie Lufteinsaugung und Luftausblasung mit einem oder mehreren Ausblasschläuchen gemäß Fig. 6.
• Lufteinsaugung mit einem oder mehreren Schläuchen und Luftausblasung mit einem oder mehren Ausblasschläuchen gemäß Fig. 8.
• Verschluss aller Öffnungen mit Abdeckplatten 33 - 35 und Verschlusselementen 44 z.B. zu Transportzwecken gemäß Fig. 9 - 12.

Overall, the following combination options arise:

• Free air intake and free air blow-out according to Fig. 1 ,
• Air intake with one or more hoses and free air blow-out according to Fig. 5 ,
• Free air intake and air discharge with one or more outlet hoses according to Fig. 6 ,
• Air intake with one or more hoses and air blow with one or more Ausblasschläuchen according to Fig. 8 ,
• Closure of all openings with cover plates 33-35 and closure elements 44 eg for transport purposes according to Fig. 9 - 12 ,

As the figures show, the filter device is designed as a filter car. At the rear 13, two transport rollers 45 are fixed by a support member 46. In addition to the main rollers or transport rollers 45, two smaller support rollers 48 are provided on the underside of the housing.

In addition, a pivotable transport bracket 47 is attached to the housing, this in eg Fig. 1 collapsed and in Fig. 3 unfolded is shown.

Each tube 31, 32, 42, 43 may have a diameter of 150-400 mm and a length of 3 to 10 meters. The device can be designed for 1000 - 10000 m ³ / h.

The invention is not limited to this example, so the filter device may also have a deviating from the figures housing shape, for example cylindrical. The sides or coarse filters therefore do not have to be flat, but can also be curved, so that the walls 13 - 16 can also be other surfaces.

LIST OF REFERENCE NUMBERS

10

casing

11

dust filter

12

filter chamber

13-16

wall sides

17

frame

18

First opening

19

coarse filter

20

filter holder

21

filter plate

22

Body cap

23, 24

-

25

filter opening

26, 27

Air outlet openings

28

Exterior Front

29, 30

adapter plates

31, 32

suction hoses

33 - 35

cover

36, 37

handles

38, 39

-

40

Second opening

41

adapter ring

42, 43

Ausblasschläuche

44

closure element

45

transport wheels

46

support element

47

transport bracket

48

support rollers

100

filter means

Claims (9)

1. Filter device (100) for air filtering, in particular for renovation work in buildings, with a housing (10), in which at least one dust filter (11), especially a HEPA filter, and at least one fan for dust extraction are arranged, wherein the housing (10) is equipped with a plurality of air inlet sides as well as with at least one air outlet opening (26, 27) for blowing out the air sucked into the housing (10) by the fan and the fan generates a negative pressure at each air outlet side, wherein a detachable adapter plate (29, 30) for a suction hose (31, 32) or a detachable cover plate (33, 34, 35) can be attached to at several air inlet sides in such a way, that optionally a free air intake, if the adapter plate (29, 30) or cover plate (33, 34, 35) is not mounted, or a suction through a suction tube (31, 32), if the adapter plate (29, 30) is mounted, is possible at several air inlet sides, characterized in that there the housing (10) has a total of two air outlet openings (26, 27) opposite to each other.
2. Filter device according to claim 1, characterized in that a blow-out hose (42) can be connected to at least one air outlet opening (26).
3. Filter device according to claim 1 or 2, characterized in that a blow-out hose (42, 43) can be connected to each air outlet opening (26, 27), so that a blow-out hose (42, 43) is present either at all air outlet openings (26, 27) or only at a part of the air outlet openings (26, 27), wherein the remaining air outlet opening(s) (26, 27) can be covered by a closure element (44) or by several closure elements.
4. Filter device according to one of the preceding claims, characterized in that a coarse filter or a pre-filter (19) can be attached to each air inlet side.
5. Filter device according to one of the preceding claims, characterized in that the coarse filter or pre-filter (19) comprises a lattice structure and a filter plate (21) arranged behind it in the direction of flow, wherein the dust filter (11) in the housing (10), that is configured as a fine filter, in particular the HEPA filter, is configured as a hollow cylinder.
6. Filter device according to one of the preceding claims, characterized in that the housing (10) is provided with a total of three air intake sides.
7. Filter device according to claim 6, characterized in that alternatively only one adapter plate (30) with a suction hose (31) can be attached to the housing (10), while the other two air inlet sides are provided with cover plates (33, 34), and that at the housing (10) optionally two of the three air inlet sides can be provided with an adapter plate (29, 30) with a suction hose (31, 32), wherein also the adapter plate (29, 30) or cover plate (33, 34) could be attached to neither side, so that all three sides can be selected as free suction sides.
8. Filter device according to one of the preceding claims, characterized in a configuration as a filter carriage.
9. Filter device according to one of the preceding claims, characterized in that the housing (10) comprises a box-shaped filter compartment (12) in which a dust filter (11) can be attached, wherein several wall sides (13, 14, 15, 16) of the filter compartment (12) form the air inlet sides, and that a housing cover (22) is arranged across the filter chamber (12), which is configured like a cover to release the filter compartment (12), wherein the two air outlet openings (26) are arranged at the housing cover (22).

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