DE8707079U1 - Filter module for clean room ceilings and walls etc. - Google Patents

Description

PATENT ATTORNEYS HEMMERlCM''MÜLLER" ¹ QRO^SE%f ^# OLÄ.MEIER · MEY

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Heinrich Nickel ÖrabH, Siegstrasse 28-34, 5240 Betzdorf

Filter module for cleanroom ceilings
and walls or the like

The innovation relates to a filter module for clean room ceilings and walls or the like, which is formed by a pressure chamber and a ceiling or wall cavity kept at negative pressure and contains a suspended matter filter which can be interchangeably fixed to the pressure chamber by means of a surrounding frame via clamping elements engaging thereon and associated sealing elements for the ceiling or wall cavity.

The innovation also concerns filter modules in which the pressure chamber consists of a pressure box provided with a connection nozzle, which can be inserted into the ceiling or wall cavity kept at negative pressure, whereby the suspended matter filter can be fixed to the pressure box by means of the surrounding frame via clamping elements acting on it and associated sealing elements for the ceiling or wall cavity.

Such filter modules are used to neutralize the risk of leaks in suspended matter filter ceilings or walls. They are designed and installed in such a way that by maintaining a negative pressure in the ceiling or wall cavity the flow direction through a leak is reversed so that the occurrence of such leaks is irrelevant because the leakage air flows away from the clean room into the ceiling or wall cavity.

PATENT ATTORNEYS HEMMSRICH« ^WX'lER «-«(3RO3SE ^.PÖLtMEIER ■ MEY

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When using such filter modules for filter |

ceilings or walls is between the filter module and the |

associated contact surfaces of the ceiling or wall construction |.

only one sealing area is provided, which |

between the front surface facing the room side on the frame |

the suspended matter filter and the contact or support surfaces of the ceiling or wall cavity, as is usual with normal filter ceilings or walls, where only suspended matter filters with surrounding frames are installed directly in the ceiling or wall cavity, i.e. are not separated from it by special pressure chambers.

However, practical experience has shown that the filter modules of the known type can only inadequately meet the requirements placed on them in most applications.

The innovation is therefore based on the task of creating filter modules of the type initially specified for clean room ceilings and walls f or the like, which, with simple construction means, make leaks that occur in the seal between the respective suspended matter filter and the associated contact surfaces of the ceiling or wall cavity irrelevant, but nevertheless ensure that the suspended matter filters and their frames can be easily replaced. The solution to this problem, according to the characterizing part of claim 1, consists in the fact that the ceiling or wall cavity is positioned in front of the pressure chamber as a whole and accommodates the frame surrounding the suspended matter filter via its construction depth, that at least two sealing areas spaced apart from one another are formed between the frame of the suspended matter filter and the pressure chamber, and that the spacing area delimited by these sealing areas is only open into the ceiling or wall cavity.

PATENT ATTORNEYS HEMMER ICH·"MÖLLER*-.'GBGSSE'.PÖLmEIER · MEY ~ ⁸

The same task is solved in filter modules that have a pressure box provided with a connection piece that can be inserted into a ceiling or wall cavity kept under negative pressure, according to the characterizing part of claim 2, in that at least two sealing areas spaced apart from one another are formed between the frame of the suspended matter filter and the pressure box, and that the spacing area delimited by these sealing areas is only open into the ceiling or wall cavity.

It is obvious that in both cases, by sealing the distance area corresponding to the ceiling or wall cavity, any leakage air that may occur is transported away by the negative pressure in the ceiling or wall cavity before it can reach the actual clean room.

An innovative further development measure according to claim 3 consists in the fact that the two sealing areas are provided at least approximately on the same level, on the one hand between the frame of the suspended matter filter and the pressure box, and on the other hand between a contact surface of the ceiling cavity and a pressure frame gripped by the clamping elements, and that the pressure frame is designed as an installation frame that accommodates the suspended matter filter and its frame over the entire height. The entire suspended matter filter, including the frame that supports it, is therefore enclosed by the installation frame and, through the latter, is kept in flow connection with the ceiling or wall cavity kept at a negative pressure.

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In this case, a design according to claim 4 has proven particularly useful, which consists in the frame of the suspended matter filter being held in contact with the installation frame by an additional third seal on its front surface facing the room. The gap that may exist between the frame of the suspended matter filter and the installation frame that accommodates it is also held in flow connection with the ceiling or wall cavity in this way.

Another innovative design option for a filter module is, according to claim 5, that the two sealing areas are at least approximately on the same level, on the one hand, assigned to the frame of the suspended matter filter and on the other hand to a contact surface of the ceiling or wall cavity, and that a sealing frame that encloses the suspended matter filter and the ceiling or wall cavity can be pressed against both sealing areas at the same time by means of the clamping elements. Such a design is particularly recommended when not only the construction height of the pressure box of the filter modules, but also their suspended matter filters with frames are to be accommodated within the ceiling cavity.

Here too, according to the proposal of claim 6, it is recommended that the frame of the suspended matter filter is kept in contact with the pressure box by an additional third seal in order to further improve the achievable sealing effect while preventing leakage of air into the free space.

In a further embodiment of the innovative concept, according to claim 7, each sealing area is formed by an independent sealing element.

PATENT ATTORNEYS HEMMER ICH"'-'MÖLLER - GSO^SE *<PÖL£mEIER · MEY ¹⁰

In many cases, however, it proves to be particularly advantageous if, according to claim 8, both sealing areas are formed on a common sealing element, which preferably has a channel profile, wherein the space of the channel profile remaining free when the sealing areas are sealed is connected to the ceiling or wall cavity.

A further possible design for a filter module according to the innovation is, according to claim 9, that both sealing areas are assigned to the ends facing away from each other on the frame of the suspended matter filter, that the upper Ωδιδι-

&bull;J sealing area on the pressure box and the lower sealing area

''I can be placed on a supporting surface of the ceiling cavity, and that

* the support surface of the ceiling cavity and the pressure chamber

_; i st through the clamping elements against each other and against the

Sealing areas can be clamped.

Finally, an innovation feature according to claim 10 is

S can also be seen in the fact that the distance range between

the sealing areas by a cover between

\ Pressure box and ceiling or wall cavity provided

&igr; Slots, holes or similar openings with the ceiling

, or wall cavity is in constant connection.

However, the scope of the innovation also includes, according to claim lI, a design for a filter module, which is characterized in that the frame of the suspended matter filter is provided on its front face with a collar that projects beyond its outer contour, which forms the pressure surface for the two sealing areas that are at least approximately on the same level, with one sealing area in front of the face of the frame on the collar and on the pressure box

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While the other sealing area is arranged between the part of the collar that protrudes beyond the frame and a contact surface of the ceiling cavity.

In this case, according to claim 12, it is also recommended that the collar has a stiffening or stabilizing bend on its outer edge.

According to claim 13, the Swiss branch can use the dish- |

areas through the boundary edge of the cover of the |

Ceiling or wall cavity in constant connection with this^ |

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In the drawing, the subject of the innovation is shown in examples of implementation.

Figure 5 shows a simplified schematic representation of a vertical section through a section of a filter module in a modified design,

Figure 6 shows a further possible modification for a filter module in a representation corresponding to Figure 5 and

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Figure 1 shows a sectioned side view of a section of | a cleanroom ceiling, |

Figure 2 is a view in the direction of arrow II of Fig. 1, |

Figure 3 is a partial view in the direction of arrow III of Fig. 1,

Figure 4 shows on a larger scale and in more detail the section marked III in Fig. 1, i

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Figure 7 again shows a schematically simplified vertical section representation another possible design for a filter module, while

FigUE 8 shows a modified design compared to Fig. 4 for a filter module,

Figure S in sinsis of Fig; 1 similar detail another/ particularly advantageous embodiment for a filter module and

Figure 10 a section along the line X-X in Fig. 9*

Figures 1 to 4 of the drawing show, as an example of the application of the innovation, a so-called clean room filter ceiling, which is attached in the usual way as a substructure via hanging rods 1 or the like to a building ceiling (not shown). The hanging rods 1 or the like engage with support rails 2 via vibration isolators 3, whereby the support rails 2 can have a Z-shaped cross-section, for example. The hanging rods 1 or the like engage close to the upper horizontal profile leg of the support rails 2 via their vibration isolators 3, while the lower horizontal leg of the same is used to attach essentially flat, plate-shaped covers to the ceiling substructure.

Each individual plate-like cover 4 is provided with a cutout 5, behind which a pressure box 6 is located, which is provided with a connection piece 7 for the supply line 8 of the raw air.

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The pressure box 6 is located entirely behind the level of the cover 4, which delimits a ceiling cavity 9 at the bottom.

At the bottom, a suspended matter filter 10 is connected to the pressure box 6 or to the cutout 5 of the cover 4, which is surrounded over its entire height by a frame 11 made of rigid, pressure-tight material.

The suspended matter filter 10 is housed in a frame 11 in a mounting frame 12, for example made of relatively thin sheet metal, the legs of which have a substantially Z-shaped profile cross-section, as can essentially be seen in Figs. 1 and 4.

The frame 11 of the suspended matter filter 10 rests with its lower flat front surface 11a on the lower inward-facing flange 12a of the installation frame 12, with a relatively flat but wide seal 13 in between, while its upper flat front surface 11b is assigned to a seal 14 which is also flat but wide and which is located adjacent to the cutout 5 on the underside of the cover 4.

The upper horizontal flange 12b of the installation frame 12 is directed outwards parallel to the cover 4 and interacts with a relatively thin but flat seal 15, which is on the same level as the seal 14, but is spaced from it all around such that a frame-like free space 16 remains between the two seals 14 and 15.

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The seals 13, 14 and 15 can also have cross-sectional shapes other than those shown. For example, they can be provided with a round cross-section; however, they can also have a tapered, e.g. trapezoidal, cross-sectional shape.

The lower horizontal flange of the support rails 2 and also the cover 4 held by them are penetrated from top to bottom by threaded bolts 17, which can also reach through associated holes on the upper flange 12b of the frame 12. The installation frame 12 can be clamped in its upper horizontal flange 12b against the seal 15 and via this against the cover 4 using wing nuts 18, which work together with the threaded bolts 17 as clamping elements. By tightening the clamping elements, the seal 13 between the installation frame 12 and the frame 12 is also clamped.

* see the lower horizontal flange 12a and the frame 11

of the suspended matter filter 10 as well as the seal 14 between the frame 11 of the suspended matter filter 10 and the cover 4 are placed under sealing prestress. The free space 16 between the two seals 14 and 15 is connected to the gap 19, which is enclosed between the outer peripheral surface of the frame 11 and the inner surface of the web 12c on the installation frame 12.

The ceiling cavity 9 above the cover and around the pressure box 6 is constantly kept under a negative pressure. This negative pressure acts on the free space 16 in the distance area between the two seals 14 and 15 through slots 20, holes or similar openings provided in the cover 4. In the event that leaks should develop in the area between the seal 14, the front surface 11b of the frame 11 and the cover 4 or the pressure box for any reason, the

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s thereby as leakage air into the free space 16 and the gap space &iacgr;

19 passing through the slots 20 or the like f

into the ceiling cavity 9 and therefore cannot be used in §

enter the clean room. Only the particles that pass through the suspended matter filter |

Clean air that has passed through 10 can therefore enter the clean room with a downward flow.

The design of a filter module shown in Fig. 5 of the drawing differs from that shown in Figs. 18? to 4 essentially in that not only the pressure box f 6 , but also the suspended matter filter | 10 located in front of it and the frame 11 containing it are laid behind the level of the covers 4 of the ceiling substructure.

This filter module lacks the installation frame 12 with the Z-shaped profiled legs. Instead, an essentially flat ^sealing frame 21 works together with the clamping elements, which can consist of threaded bolts 17 and wing nuts 18.

The seal 14 in the filter module according to Fig. 5 has the same arrangement and design as in the filter module according to Figs. 1 to 4, i.e. it is clamped there between the flange frame 22 delimiting the opening side ? of the pressure box 6 and the flat end face 11b of the frame 11 surrounding the suspended matter filter 10, facing it.

The seal 13 also has the same installation position as in the case of the embodiment according to Fig. 4, i.e. it is assigned to the downward-facing, flat front surface 11a of the frame 11.

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PATENT ATTORNEYS HEMMERICH · MÜLLER · GROSSE'" I ³ OIlLMEIER .·. &Mgr;&egr;&Udigr;'..' ~! ¹⁶ ~

However, according to Fig. 5, the seal 15 is not in the same plane as the seal 14, but rather in the same plane as the seal 13 on the underside of the cover 4 of the ceiling substructure. Both seals 13 and 15 work together here with the sealing frame 21, which can be clamped using the clamping elements 17/18 and thereby closes off the free space 16 between the two seals 13 and 15 towards the clean room.

The free space 16 is constantly connected to the cavity 9 kept under pressure via slots 20 which remain free between the boundary edge of the cutout 5 in the cover 4 and the outer peripheral surface of the frame 11 surrounding the suspended matter filter 10.

Any untreated air that may pass the sealing element 14 from the pressure box 6 cannot enter the clean room, but is sucked out at the latest from the area of the free space 16 between the two sealing elements 13 and 15 and the sealing space 21 into the ceiling cavity 9.

A design of a filter module similar to the embodiment according to Figs. 1 to 4 is shown in Fig. 6.

S With this filter module, however, only one seal is installed between the frame 11 of the suspended matter filter 10/ the pressure box 6 and the cover 4 of the ceiling substructure and is pre-tensioned using the tensioning elements 17/18.

The seal 23 essentially has a channel cross-section with two parallel sealing webs 23a and 23b, one of which is attached to the flange frame 22 of the pressure box 6 and the other near the cutout 5 on the cover 4 for

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PATENT ATTORNEYS HEMMERICH · MÜLLER · GROSSE*· PDLLM*EfEFf '-'MEY "'*" ¹⁷

The channel part located between the two sealing webs 23a and 23b delimits the free space _16r which is in constant suction connection with the ceiling cavity 9 through the slot 20 between the flange frame 22 of the pressure box 6 and the cutout 5 of the cover 4. Here too, raw air passing the sealing web 23a of the seal 23 as leakage air cannot get into the clean room, but rather it is discharged from the free space 16 within the seal 23.

Compared to the filter module according to Fig. 1 to 4, the filter module according to Fig. 6 is not only structurally simpler because only one seal, namely a channel profile seal 23, is used instead of three. Rather, the installation frame 12 can also be dispensed with here because the clamping elements 17/18, which each consist of a threaded bolt 17 and a wing nut 18, for example, can work together with a simple flat clamping frame 24 that engages the frame 11 of the suspended matter filter 10.

A design for a filter module similar to the filter module in Fig. 5 is again shown in Fig. 7 of the drawing. Here too, in addition to the pressure box 6, the suspended matter filter 10 with its frame 11 is installed behind the cover 4 of the ceiling substructure, relocated.

However, the filter module according to Fig. 7 differs from the design according to Fig. 6 in that only the two seals 13 and 14 are provided, while the third seal 15 and the sealing frame 21 are omitted.

The frame 11 of the suspended matter filter 10 is secured by means of the two seals 13 via the clamping elements 17/18, which here can also consist of threaded bolts and wing nuts.

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PATENT ATTORNEYS HEMMERICH · MÜLLER · GROSS&· VoLLMBER.^EY'. ·'

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and 14 are clamped directly between the cover 4 of the ceiling substructure and the flange frame 22 of the pressure box 6.

In particular, the raw air that may possibly leak past the seal 14 enters directly into the ceiling cavity 9, which is kept at a negative pressure, and therefore cannot penetrate into the clean room.

Fig. 8 shows a modified and significantly simplified design compared to Fig. 4 for filter modules used in clean room filter ceilings.

Behind the plate-shaped cover 4 of the ceiling substructure, there is also a pressure box 6, which connects with its opening to the cutout 5 of the cover 4. The pressure box 6 is surrounded by the ceiling cavity 9 below the cover 4.

The pressure box 6 or the cutout 5 of the cover 4 is connected to the suspended matter filter 10, which is surrounded by the frame 11 made of rigid, pressure-tight material.

The upper front surface 11b of the frame 11 carries a collar 25, which is made of sheet metal, for example, and has a stiffening or stabilizing bend 26 at least on its outer boundary edge. The collar 25 is attached to the front surface 11b of the frame 11, for example screwed. Its profile width is larger than the wall thickness of the frame 11, such that it projects beyond the outer contour of the frame 11 by a considerable amount, as can be clearly seen from Fig. 8.

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The main plane of the collar 25 extends parallel to the plate-shaped cover 4 of the ceiling substructure. Ef forms the pressure surface for two seals 14 and 15, which are approximately on the same plane and are spaced apart from each other all around such that they define a frame-like clearance 16 between them.

The seal 14 lies on the collar 25 in the area in front of the front surface 11b of the frame 11^, while the seal 15 lies on the section of the collar 25 that projects beyond the outer contour of the frame 11.

With the help of the collar 25, the seals 14 and 15 \

against the cover 4 of the ceiling substructure I

tend to be clamped. Threaded bolts can be used as clamping elements j

zen 17 and wing nuts 18 are used, as shown in t

Fig. 4. These clamping elements can be I

either directly between the collar 2 5 of the frame 11 )

and the ceiling substructure are made effective in )

t in a similar way, as shown in Fig. 4. However, they can also be arranged and designed as shown, for example, in |

Yt Fig. 6 of the drawing can be seen. &iacgr;

In any case, it is essential that the frame-like free space 16 between the seals 14 and 15 and the collar 25 is connected to the ceiling cavity 9 above the cover 4 through slots 20, holes or similar openings provided in the cover 4, which is constantly kept under negative pressure.

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The design of the filter module according to Fig. 8 is considerably simplified compared to that according to Fig. 4* because not only the mounting frame 12 but also the seal 13 provided between it and the lower end face 11a of the frame 11 can be dispensed with.

In the clean room filter ceiling according to Fig. 8 and 9, the pressure chamber 6 is provided directly below the building ceiling, i.e. no special pressure box is provided here. The ceiling or wall cavity 9 is located in front of this pressure chamber 6, as can be clearly seen in Fig. 9.

What is important in this design of a filter module is that the ceiling or wall cavity 9 accommodates the frame 11 containing the suspended matter filter 10 over its construction depth.

Within the ceiling cavity 9, which is subjected to a negative pressure, the frame 11 of the suspended matter filter 10 is held in an exchangeable manner by means of the sealing frame 21 via the clamping elements 17/18, whereby the cover 4 forming the outer boundary of the ceiling or wall cavity 9 has a boundary edge 27 which is angled parallel to the outer boundary surface of the frame 11 and which protrudes into the ceiling or wall cavity.

The pressure chamber 6 is pressure-tightly separated from the ceiling or wall cavity 9 by a cover 28* which also has an angled boundary edge 29 that protrudes into the pressure chamber 6.

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PATENT ATTORNEYS HEMMERICH · MÜLLER · GROSSE < POLLMEIER · MEY

The cover 28 for the pressure chamber 6 is dimensioned such that when the suspended matter filter 10 is inserted into the ceiling or wall cavity 9, its boundary edge 29 overlaps the frame 11 of the same by approximately the thickness of its wall, so that the boundary edge 23 comes to lie approximately on the same level as the inner surface of the frame 11, as can be clearly seen in Fig. 9.

The arrangement of the three seals 13, 14 and 15 relative to the suspended matter filter 10 or to its frame 11 as well as to the pressure chamber 6 and to the ceiling or wall cavity 9 essentially corresponds to the arrangement as already explained above in connection with Fig. 5 of the drawing.

The seal 13 is located between the lower, flat face 11a of the frame 11 containing the suspended matter filter 10 and the sealing frame 21. The seal 14 is provided between the upper, flat face 11b of the frame 11 and the cover 28 of the pressure chamber 6. Finally, the seal 15 is located between the cover 4 of the ceiling or wall cavity 9 and the sealing frame 21.

The free space 16 delimited by the two seals 13 and 15 and the sealing frame 21 is constantly connected to the ceiling or wall cavity 9 through the gap between the angled boundary edge 27 of the cover 4 and the outer boundary surface of the frame 11 containing the suspended matter filter 10. Leakage air that enters the free space 16 is therefore safely drawn off into the ceiling or wall cavity 9. Leakage air that passes the upper seal 14 is also drawn off in this ceiling or wall cavity 9, and therefore cannot get past the suspended matter filter 10 into the clean room.

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It should also be mentioned that the seals 13, 14 and 15 have a cross-sectional shape that tapers trapezoidally over part of their thickness. The seals 13 and 14 each rest with their broad base surface on the flat end faces 11a and 11b of the frame 11, while their narrower head surface is in contact with the sealing frame 21 or the cover 28.

Oil seal 15, on the other hand, rests with its broad base surface on the sealing frame 21, while its narrower head surface is brought into contact with the cover 4.

With the help of the tensioning elements 17/18, all three seals 13, 14 and 15 are jointly pre-stressed and the floating filter 10 is thus interchangeably fixed via its frame II within the construction depth of the ceiling or thermal cavity 9.

Claims (13)

1. Filter module for clean room ceilings and walls or the like, which is formed by a pressure chamber and a ceiling or wall cavity maintained at negative pressure and contains a suspended matter filter which can be fixed to the pressure chamber by means of a frame surrounding it via clamping elements engaging thereon and associated sealing elements to the ceiling or wall cavity in an exchangeable manner is, characterized" that the ceiling or wall cavity (9) is positioned in front of the pressure chamber (6) and accommodates the frame (11) surrounding the suspended matter filter (10) over its construction depth, that at least two sealing areas (14, 15; 13, 15; 23a, 23b; 13, 14) spaced apart from one another are formed between the frame (11) of the suspended matter filter (10) and the pressure chamber (6), and that the spacing area (16) delimited by these sealing areas is only open (20) into the ceiling or wall cavity (9). 2. Filter module for clean room ceilings and walls or the like, consisting of a pressure box provided with a connection piece, which can be inserted into a ceiling or wall cavity kept at negative pressure, and of a suspended matter filter/ which is connected to the air by means of a PATENT ATTORNEYS HEMMERICW MEY the frame can be fixed to the pressure box using clamping elements that engage with it and associated sealing elements for the ceiling or wall cavity, characterized,
that at least two spaced-apart sealing areas (14p, 15; 13, 15; 23a, 23b; 13, 14) are formed between the frame (11) of the suspended matter filter (10) and the pressure box (6), and that the distance area (16) delimited by these sealing areas is only open (20) into the ceiling or wall cavity (9). 3. Filter module according to claim 2, characterized, that the two sealing areas (14, 15) are provided at least approximately on the same level, on the one hand between the frame (11) of the suspended matter filter (10) and the pressure box (6) and on the other hand between a contact surface (4) of the ceiling or wall cavity (9) and a pressure frame (12) that can be gripped by the clamping elements (17/18), and that the pressure frame (12) is designed as a mounting frame that accommodates the sponge filter (10) and its frame (11) over the entire height (Fig. 1 to 4). 4. Filter module according to claim 3, characterized, that the frame (11) of the suspended matter filter (10) is held in contact with the installation frame (12) by an additional, third seal (13) on an end face (11a) facing the clean room (12a; Fig. 1 to 4). till it 44** · * 4444 4· ItI » # 4 4 « V lit 4 Φ P- 44· f I · 4 · &iacgr; 4 >·· J ** ·· .4H .tllllc ti*» «till f I PATENT ATTORNEYS HEMMERlCH-^MUllER^kOQSSE '-.SOLUv)EI ER - ^and Filter module according to claim 1 or claim 2,
characterized
that the two sealing areas (13, 15) are at least approximately on the same level and are assigned on the one hand to the frame (11) of the suspended matter filter (10) and on the other hand to a contact surface (4) of the ceiling or wall cavity (9), and that a sealing frame (21) which encloses the suspended matter filter (10) and the basin or wall cavity (9) can be pressed against both sealing areas (13, 15) simultaneously by means of the clamping elements (17/18) (Fig. 5 and 9)* 6. Filter module according to claim 5,
characterized, that the frame (11) of the suspended matter filter (10) is held in contact with the pressure chamber or pressure boxes (6) by an additional - third - seal (14) (Fig. 5 and 9). 7. Filter module according to one of claims 1 to 6,
characterized, that each sealing area (13, 14, 15) is formed by an independent sealing element (Fig. 4, 5, 7, 8 and 9). 8. Filter module according to one of claims 2, 3 and 5,
characterized by that both sealing areas (23a, 23b) are formed on a common sealing element (23), which preferably has a groove profile (Fig. 6). · · "44 PATENT ATTORNEYS HEMMERICH'^'MÖLLER* "GRCESE ^f «PÖLtMElER · MEV 9. Filter module according to claim 1 or claim 2, characterized by, jj that both sealing elements (13, 14) are assigned to the opposite ends (Ha and lib) on the frame (11) of the suspended matter filter (10),
that the upper sealing area (14) can be placed on the pressure chamber or pressure box (6) and the lower sealing area (13) on a support surface (4) of the ceiling or wall cavity (9), and that the support surface (4) of the ceiling or wall cavity (9) and the pressure chamber or pressure box (6) can be clamped against each other and against the sealing areas (13, 14) by the clamping elements (17/18). 10. Filter module according to claim 2,
characterized, that the spacing area (16) between the sealing areas (14/15 or 13, 15 or 23a, 23b) is in constant communication with the ceiling or wall cavity (9) through slots (20), holes or similar openings provided in a cover (4) between the pressure box (6) and the ceiling or wall cavity (9). 11. Filter module according to claim 2,
characterized, that the frame (11) of the suspended matter filter (10) is provided on its upper end face (Hb) with a collar (25) projecting beyond its outer contour, which forms the pressure surface for the two sealing areas (14, 15) lying at least approximately on the same plane, whereby one sealing area (14) in front of the end face (Hb) of the frame (11) is on the collar (25) and on the pressure box (6) PATENT ATTORNEYS HEMMER I* Il Uli Il I < <· &bull;Möller -.oro£se -',ROLtMEiEn · mey While the other sealing area (15) is arranged between the section of the collar (25) projecting beyond the frame (11) and a contact surface (4) of the ceiling or wall cavity (9). 12. Filter module according to claims 2 and 11,
characterized. that the collar (25) has a stiffening or reinforcement strip on its outer boundary edge. 13. Fiitefmodului according to claim 1,
characterized, that the spacing area (16) between the sealing areas (14, 15) is in constant connection with the ceiling or wall cavity (9) through the boundary edge (27) of the cover (4).