EP0968634A2

EP0968634A2 - Screening device for protecting a room against sources of electromagnetic interference

Info

Publication number: EP0968634A2
Application number: EP98919124A
Authority: EP
Inventors: Paul Vanbutsele; Diethard MÖHR; Kurt Bertuleit; Johan De Schacht
Original assignee: Schlegel
Current assignee: Schlegel
Priority date: 1997-03-21
Filing date: 1998-03-21
Publication date: 2000-01-05
Also published as: DE19712036A1; WO1998043468A2; WO1998043468A3

Abstract

The invention relates to a screening device for protecting a room against sources of electromagnetic interference. The device consists of a screening material (6) with which floor, wall and ceiling areas of the room are coated. In order to additionally obtain a satisfactory screening effect in respect of windows, for example, the screening device has a blind (7) for each window (3) of the room that is to be screen-protected, by means of which the aperture (2) of the respective window (3) can be blocked, and said blind (7) has a screening coating (8).

Description

description

Screening device to protect a room against electromagnetic interference

The invention relates to a shielding device for protecting a room against electromagnetic interference, with shielding material by means of which the floor, wall and ceiling surfaces of the room are coated.

The invention is based on the object of developing the generic shielding device described above in such a way that the shielding effect of the device is significantly improved with a comparatively low technical and structural outlay.

This object is achieved in that the shielding device has a roller blind for each window of the room to be shielded, by means of which a window opening of the respective window can be closed and which has a shielding layer. According to the invention, the space to be shielded can also be secured at the window openings breaking through the wall against the ingress of interference pulses originating from electromagnetic interference sources.

If the roller blinds are each arranged between an adjustable window sash and a fixed inner frame, the window can be opened without further ado without the shielding effect of the roller blind being impaired.

A further improvement in the shielding effect of the shielding ^device according to the invention is achieved if the shielding ^{device has} a shielding layer for each door of the room to be shielded, with a shielding layer shielding the door opening of the respective door when the door is closed. In order to dispense with any additional measures when opening the door or when passing through the door, the shielding layer should, in an advantageous embodiment of the invention, be on the inner surface of the door and on the surface sections of the door edge surfaces that extend between the inner surface and a shield seal that sits on the door edge surfaces be arranged. This ensures that no interfering impulses enter the space to be shielded even through the space between the door and the wall.

In order to prevent or eliminate impairments of the shielding effect due to small breakthroughs in the shielding material, such breakthroughs in the shielding material are very often inevitable if objects have to be attached or fastened to the wall, the ceiling or the floor, it is expedient , if the shielding device has the shielding material on the floor, wall and ceiling surfaces penetrating opening of the opening associated with the cover plate, which is fixed by a conductive adhesive.

Be ushered to secure those points where the pipes in the space to be shielded against the ingress of originating from sources of electromagnetic interference noise pulses is advantageous when the shielding device according to the space to be shielded inside led pipe a on the circumference of the pipe arranged concentrically From ^¬ has a shielding element which rests with an end face against the floor, wall or ceiling surface of the room to be shielded, which is coated with the shielding material.

To securely attach the shielding element to the floor, wall or ceiling surface, the shielding element should preferably be fixed to the floor, wall or ceiling surface of the space to be shielded by means of a holder surrounding it screwed, be.

If the room to be shielded is provided with a suspended ceiling, it is advantageous if, on the ceiling surface of the room to be shielded with the shielding material, shielded suspension fastenings are attached, in which suspension cables for a suspended ceiling can be fixed. No measures are then required on the suspended ceiling itself in order to maintain the safe shielding of the room to be shielded.

In order to reliably shield even such weak points that are associated with line filters assigned to input lines, it is expedient if the shielding material arranged on the floor, wall or ceiling surface of the room to be shielded has the relevant floor, wall or Cover surface forms a cavity in which the for input lines, for example Power, data and telephone lines, line filters provided are arranged.

To secure the shielding material protruding from the inside of the wall, it is advantageous if the shielding material is covered on its section forming the cavity by means of a protective cover attached to the floor, wall or ceiling surface.

In the case of line filters arranged outside the room, the shielding device can have a shielding box which is arranged on the outside of the wall coated on the inside with the shielding material and on the outside of which the line filters provided for the input lines, for example energy, data and telephone lines are arranged, said shield also comprising, a Lei ^¬ tung shield surrounding a shielding box to be connected with an on the inside of the wall provided on the shielding fuse box supply line. In an advantageous embodiment, the shielding material of the shielding device, in particular the shielding layers, consists of a nonwoven made of synthetic fibers, yarns or the like, for example of a polyamide or polyester, and a metal layer, which covers every fiber, every thread or the like. of the fleece encased all around.

If the fleece has a weight of 10 to 40 and the metal pads have a weight of 25 to 50 g / m2, the shielding material has excellent shielding effects, while the handling of the shielding material remains guaranteed.

Polyamide 6 (Perlon) or polyamide 6/6 (nylon) can be provided as the actual fleece-forming material. The fleece made from these materials, especially nylon, is tear-resistant, surface-stable and breathable. The thickness of the fibers, yarns or the like forming the fleece. should expediently be between 1 and 30, preferably between 3 and 20 dtex, which ensures sufficient strength with sufficient elastic properties.

If the nonwoven is produced as a spunbonded fabric from intermingled endless spun threads, it has no closed fiber layers, which means that it has considerably more favorable properties with regard to its tear strength.

Since the metal layer, which preferably consists of copper and / or silver, nickel or tin, encloses each individual fiber of the spunbonded fabric separately, no closed ones are created

Surfaces, the breathability of the shielding material is maintained with a high metal content, which is advantageous for the shielding effect. In addition, there is due to the complete covering of the fibers, yarns or the like forming the nonwoven. no difference between the front and back ^¬ side effect of shielding. The preferably as copper Fer- or metal layer formed metal pad is soft and ductile, so that the mechanical properties of the fleece, namely its elasticity, its permeability and its ability to be cut, are fully preserved. In order to protect the near-surface metal, in particular the copper, against adverse effects resulting from moisture and similar influences, the metal coating is expediently coated with a corrosion-preventing material, which can be an acrylate-based surface coating. Although such an acrylate-based surface coating offers reliable protection of the metal layer against the influences mentioned, it has no effect on the surface conductivity of the metal layer, which is particularly important for the shielding effect, since only a high surface conductivity results in good electronic shielding.

In a further embodiment of the invention, the surface coating is designed as a two-component acrylate copoly er.

If the shielding material should also shield interference pulses in the low frequency range below 1 MHz, that is, the magnetic field component of an electromagnetic field, which prevails in this frequency range, it is advantageous if the metal support comprises particles of a ferromagnetic mate rial ^¬. In this way, magnetic fields can be shielded, such as those that are present in cables with current flowing through them, in the vicinity of railway systems or in the vicinity of transformers.

The particles of the ferromagnetic material can be attached to the metal support; it is also possible to coat the metal coating with the particles made of the ferromagnetic material. With the particles of the ferromagnetic material, the rule ^¬ from the fleece and the metal support obtained existing shielding a certain permeability.

Finely ground ferrite powder, ultra-fine iron particles and / or ultra-fine nickel particles can be used as the ferromagnetic material. This ensures that the material properties of the shield with regard to corrosion, breathability and elasticity are not impaired, so that it is ensured that all conceivable with the correspondingly developed material according to the invention for shielding against electromagnetic interference

Surfaces from building walls to housing surfaces etc. can be pasted and clad.

The aforementioned ferromagnetic materials can particularly advantageously be designed in the form of laminate layers. Insulation layers are advantageously arranged between the laminate layers. In this way, the metal pad remains unchanged and retains its good effect.

Alloys containing ferrites, iron and / or nickel, which are so-called μ-metals, have proven to be particularly useful for shielding against the magnetic field component of an electromagnetic interference source. These should be used as fine particles for use as otherwise the flexibility or Elastizi ^¬ ty of the shield-forming material may be impaired.

In the following the invention is explained in more detail by means of embodiments with reference to the drawings. It gen ^¬ zei:

1 shows a plan view of a window provided with a particularly simple shielding device according to the invention;

2 shows an external view of a with an inventive Roller blind screen provided window; IG 3 is a side view of the with an inventive

Roller blind screen provided window; IG 4 a door provided with a shielding device according to the invention; IG 5 another door provided with a shielding device according to the invention; IG 6 is a side view of the door provided with a shielding device according to the invention; 7 shows a dowel device provided with a shielding device according to the invention; 8 shows a pipeline provided with a shielding device according to the invention; 9 shows a suspended ceiling in a room provided with a shielding device according to the invention and

10 and 11 show two embodiments of shielding devices according to the invention which shield line filters.

1 describes a particularly simple shielding solution for a window. A wall 1 of a room has a window opening 2 in which a window 3 is arranged.

The window 3 includes a window sash 4 which can be moved with respect to a fixed window frame 5 for opening the window 3.

On its inside facing the room, the entire wall 1 is coated with a shielding material 6, by means of which the radiation emanating from electromagnetic interference sources is to be prevented from entering the room.

The window 3 and the window opening 2 is a Abschirmma ^¬ terialbahn assigned to 7, by means of which the window opening 2 is closed down to the room. The material web 3 is fastened in contact with conductive adhesive strips or Velcro strips. 2 and 3 show roll designs. On its inside facing the room, the roller blind 7 is provided with a shielding layer 8, which is similar to that of the shielding material 6 applied flatly on the inside of the wall 1.

The roller blind 7, as can be seen in particular from FIG. 3, is arranged between the window sash 4 and an inner frame 9. The roller blind can be rolled up on a drivable roller 10 and unrolled from this roller.

At its lower end, the roller blind 7 can have a weight 11, by means of which it can be pretensioned in the vertical direction in its operating position.

A door 13 shown in FIG. 4, which opens outward about a joint 12, is provided on its inner surface 14 with a shielding layer 15, which consists of the same or a similar material as the shielding material 6 arranged on the inside of the wall 1 Shielding layer 15 also covers surface sections 16, which extend between the inner surface 14 of the door 13 and a shielding seal 17, which surrounds the door 13 on the door edge surfaces and a gap 18 between the door 13 and the wall 1 against the penetration of electromagnetic interference pulses in shields the room.

5 shows a representation similar to FIG. 4, in which the door 13 opens around the joint 12 to the inside of the wall 1.

6 shows how the shielding seal 17 is arranged on the upper door edge surface between the door 13 and the wall 1 and on the lower door edge surface between the door 13 and a threshold 19, which is also shielded. 7 shows an opening seal. A dowel device 20 arranged on the inside of the wall 1 has an opening 21 which breaks through the shielding material 6, which is attached to the inside of the wall 1. The opening 21 itself is covered by a cover plate 22 and by a dowel screw 23 or the like. closed. In order to prevent interference pulses emanating from electromagnetic interference sources through a possible space between a contact surface 24 facing the wall 1 and the wall 1 or the shielding material 6, the cover plate 22 has a conductive contact on its contact face 24 facing the wall 1 Adhesive layer 25. Adhesives of this type are known, for example from the field of contacting wires.

A pipe 26 shown in FIG. 8 breaks through the wall 1. The inside of the wall 1 is coated with the shielding material 6.

On the inside of the wall 1 sits on the pipe 26 a shielding element 27, which is made of the same or a similar material as the shielding material 6. The shielding element 27 is secured by means of a suitable holder 28, which is screwed to the wall 1 , fixed on the outer circumference of the pipeline 26 or on the inside of the wall 1.

As shown in FIG. 9, a suspended ceiling 30 is attached to a ceiling 29 of the room coated with the shielding material 6.

To attach the suspended ceiling 30 to the ceiling 29, shielded suspension fasteners 31 are provided on the ceiling 29 or on the shielding material 6, to which suspension cables 32 are fastened, on which in turn the suspended ceiling 30 is appropriately attached.

10 shows a cavity 33, which is formed by the inside of the wall 1 and the shielding material 6, which at this point is spaced apart from the inside of the wall 1. Line filters 34, 35, 36 are arranged within the cavity 33 and are assigned, for example, to an energy line, a data line and a telephone line.

The cavity 33 and the shielding material 6 arranged around the outside of the cavity is covered by a protective cover 37 which is connected in a suitable manner to the wall, e.g. screwed, is.

The connection to a fuse box 38, which is located on the inside of the wall 1 or the shielding material 6, is made by means of a feed line 39.

In the embodiment shown in FIG. 11, the line filters 34, 35, 36 are arranged on the outside of a shielding box 40 which is attached to the outer surface of the wall 1. Between the shield box 40 and on the inside of the wall 1 and the shielding material 6 Toggle parent fuse box 38 extends an the wall 1 by breaking feed line 41, the abge against electromagnetic interference by a shield line 42 is ^¬ shields.

Wherein in the case of the shielding according to the invention coming to use shielding material is a nonwoven fabric of synthetic fibers, or the like yarns., For example, from egg ^¬ nem polyamide or polyester, which is seen with a metal coating ver ^¬ that each fiber, each Yarn or the like of the fleece encased all around. The fleece has a weight of 10 to 40, the metal pad 1 from 25 to 50 g / m2. In one embodiment, the nonwoven is made of polyamide 6 (Perlon) or polyamide 6/6 (nylon).

The thickness of the fibers, yarns or the like forming the fleece. is between 1 and 30, preferably between 3 and 20 dtex.

The fleece is expediently produced as a spunbonded fabric from intermingled endless filaments.

In the case of the metal coating, copper and / or silver as well as nickel and tin are used.

The metal coating is provided with a surface coating, which is a two-component acrylate copolymer.

In order to also switch off the essentially magnetic interference components of the electromagnetic interference source, the metal layer has particles made of a ferromagnetic material.

The particles can be attached to the metal support or the metal support can be coated with the particles. The arrangement in laminated, mutually insulated layers is particularly advantageous.

As the ferromagnetic material finely ground ferrite, fine iron particles and / or fine Nickelpar ^¬ Tikel can be used.

Alternatively, ferrites, ^iron and / or nickel-containing alloys can be provided as the ferromagnetic material, which are, for example, my-metals that are used in very ^fine particles.

Claims

claims

1. Shielding device for protecting a room against electromagnetic interference, with shielding material (6), by means of the floor, wall and ceiling surfaces of the room are coated, characterized in that the shielding device has a roller blind (7) for each window (3) of the room to be shielded , by means of which a window opening (2) of the respective window (3) can be closed and which has a shielding layer (8).

2. Shielding device according to claim 1, the roller blinds (7) are each arranged between an adjustable window sash (4) and a fixed inner frame (9).

3. shielding device for protecting a room against electromagnetic interference, with shielding material (6), by means of the floor, wall and ceiling surfaces of the room are coated, preferably according to claim 1 or 2, characterized in that the shielding device per door (13) of the shielding Room has a shielding layer (15) which shields the door opening of the respective door (13) when the door (13) is closed.

4. Shielding device according to claim 3, wherein the shielding layer (15) on the inner surface (14) of the door (13) and on the surface sections (16) extending between the inner surface (14) and a shield seal (17) seated on the door edge surfaces. the door edge surfaces is arranged.

5. shielding device to protect a room against electromagnetic interference, with shielding material (6), by means of the floor, wall and ceiling surfaces of the room, preferably according to one of claims 1 to 4, since - characterized in that the shielding device each the shielding material (6) on the floor, An opening (21) penetrating wall and ceiling surfaces has a shielding lip (25) surrounding the opening (21) on the intact shielding material (6), which has a contact surface (24) on one of the openings (24) facing the floor, wall or ceiling. 21) assigned cover plate (22) sits.

6. shielding device for protecting a room against electromagnetic interference, with shielding material (6), by means of the floor, wall and ceiling surfaces of the room are coated, preferably according to one of claims 1 to 5, characterized in that the shielding device each in the room to be shielded inserted pipe (26) has a concentrically arranged on the circumference of the pipe (26) shielding element (27), which rests with an end face against the shielded material (6) floor, wall or ceiling surface of the room to be shielded.

7. shielding device according to claim 6, the shielding element (27) by means of a surrounding bracket (28) on the

Floor, wall or ceiling surface of the room to be shielded is fixed, preferably screwed.

8. shielding device for protecting a room against electromagnetic interference, with shielding material (6), by means of the floor, wall and ceiling surfaces of the room, preferably according to one of claims 1 to 7, since ^{¬ characterized in} that at the the shielding material are attached (6) coated ceiling surface of the ERS-shielding space shielded suspension mounts (31), in which suspension cable (32) can be fixed for a abge ^¬ suspended ceiling (30).

9. Shielding device for protecting a room against electromagnetic interference sources, with shielding material (6), coated by means of the floor, wall and ceiling surfaces of the room are, preferably according to one of claims 1 to 8, characterized in that the shielding material arranged on the floor, wall or ceiling surface of the room to be shielded forms a cavity (33) with the relevant floor, wall or ceiling surface , in which line filters (34, 35, 36) are provided for input lines, for example energy, data and telephone lines.

10. Shielding device according to claim 9, wherein the shielding material (6) at its portion forming the cavity (33) is covered by means of a protective cover (37) attached to the floor, wall or ceiling surface.

11. Shielding device for protecting a room against electromagnetic interference, with shielding material (6) by means of which the floor, wall and ceiling surfaces of the room are coated, preferably according to one of claims 1 to 8, characterized in that the shielding device comprises a shielding box ( 40), which is coated on the outside with the shielding material (6), and on the outside for input lines, for example Energy, data and telephone lines, line filters (34, 35, 36) are arranged, and a line shield (42) which has a shielding box (40) with one on the inside of the wall (1) on the shielding material (6 ) provided fuse box (38) connecting supply line (41) surrounds.

12. Shielding device according to one of claims 1 to 11, in which the shielding material of the shielding device or the shielding layers (8, 15) and the like. or the like from a fleece of synthe ^¬ tables fibers, yarns., for example, consists of a polyamide or polyester, and a metal layer, each fiber, each yarn or the like. of the fleece encased all around.

13. Shielding device according to claim 12, wherein the fleece has a weight of 10 to 40 and the metal coating has a weight of 25 to 50 g / m2.

14. Shielding device according to claim 12 or 13, wherein the fleece is made of polyamide 6 (Perlon) or polyamide 6/6 (nylon).

15. Shielding device according to one of claims 12 to 14, wherein the thickness of the fibers, yarns or the like forming the fleece or the like. is between 1 and 30, preferably 3 and 20 dtex.

16. Shielding device according to one of claims 12 to 15, in which the fleece as a spunbonded fabric of intermingled endless

Spun threads is made.

17. Shielding device according to one of claims 12 to 16, wherein the metal coating consists of copper and / or silver.

18. Shielding device according to one of claims 12 to 17, wherein the metal coating is provided with a surface coating on an acrylate basis.

19. Shielding device according to claim 18, wherein the surface coating is a two-component acrylate copolymer.

20. shielding according to one of claims 12 to 19, wherein the metal coating comprises particles of a ferromagnetic material ^¬ rule.

21. Shielding device according to claim 20, wherein the Parti ^¬ kel of the ferromagnetic material are attached to the metal pad.

22. Shielding device according to claim 20, wherein the metal coating is coated with the particles of the ferromagnetic material.

23. Shielding device according to one of claims 20 to 22, in which the ferromagnetic material is finely ground ferrite powder, finest iron particles and / or finest nickel particles.

24. Shielding device according to one of claims 20 to 23, in which as ferromagnetic material ferrites, iron and / or nickel containing alloys, e.g. μ-metals are provided in very fine particles.

25. Shielding device according to one of claims 20 to 24, characterized in that the fer ^¬ romagnetic material is arranged in laminate layers, which are preferably formed insulated from each other.