EP0753640B1 - Noise deadening device for insulated glazing - Google Patents

Description

The present invention relates to a device sound deadening for insulating glass of the so-called type "breathable", comprising in itself known in the technique at least two parallel panes, preferably mounted in a common frame and separated by a space containing a intermediate air space, the main advantage of which is considerably increase the thermal insulation created between the exterior and interior of the room or the like closed by the glazing.

In this type of insulating glass, it is obviously essential to provide means to avoid penetration of dust in the space separating the two panes containing the intermediate air space, and above all to prevent fogging of the glass surface in this space, which has been considered by making the latter hermetically sealed and by filling it a layer of very dry air, to eliminate condensation possible when the atmosphere outside the glazing is particularly cold, creating a temperature difference sensitive with the interior.

However, the solution of a completely sealed space was quickly revealed to be insufficient, in particular due to stresses imposed on the glazing during its use, due changes in atmospheric pressure, changes in temperature, at the pressure difference between the air space and the atmospheres on both sides of the glazing, to the effect of aging of the materials which make the seal (seals made of elastomer or rubber, sealing glue, etc.), chassis deformation under the effects of wind and actions mechanical which are necessarily imposed during assembly and / or the use of glazing.

To overcome these drawbacks as widely as possible, the technique is to make the air space, not waterproof and confined in a totally enclosed space, but by organizing a gas exchange and pressure balancing through this space, under controlled conditions.

For this purpose, the frame carrying the two parallel panes includes at least one opening into the space intermediate between these panes and allowing a flow air to settle, which sweeps the opposite faces of the panes in avoiding condensation thereon and further reducing risks of glass breakage due to variations in temperature and pressure.

Advantageously, the communication opening presents relatively small dimensions to avoid renewal high flow air which would affect performance thermal insulation of the glazing. By the way, to prevent the entry of dust or other foreign bodies, such as especially as insects in the intermediate space it is usual to provide, across the communication opening, a filter, preferably made in the form of a canvas or a pad of polyamide or other material, which allows air to pass and water vapor but comes in the way of everything any solid element. Such a device is known from document US-A-4,242,386.

Preferably this filter is removably mounted in opening for periodic replacement.

However, at the same time as this solution promotes exchanges gaseous with the outside air, it weakens the sound insulation normally provided by double glazing when space it contains is hermetically sealed.

The invention aims to avoid this drawback thanks to a insulating glazing of the "breathable" type, that is to say in which the frame which supports the two parallel panes present at less communication opening between the outside of the glazing and the space that separates these panes, for which the acoustic and phonic performances are greatly improved.

To this end, the device considered, adapted to a double insulating glass with a support frame for two parallel windows delimiting between them an intermediate space containing an air space, this space being related to the outside atmosphere by at least one opening of communication provided in the chassis and in which is mounted a filter preventing dust from entering the space or other solid bodies, is characterized in that it comprises, mounted to the right of the communication opening, inside the intermediate space, a parallelepiped box, applied against the frame by covering the opening over the filter, this box comprising at least one cutout for the evacuation of air in the intermediate space and a plurality of partitions delimiting in the internal volume of the housing a baffled path for air circulation, the outside towards the inside of this intermediate space.

Advantageously, the box is made of a material flexible, in particular made of elastomer or any other similar material having absorbent properties from a point of view acoustic, molding or other suitable process.

Preferably, the box has a plurality of partitions transverse, baffled and extending perpendicular to the parallel faces opposite this box.

Where appropriate and according to an advantageous characteristic, although already known in the art, the walls of the partitions transverse, as well as the opposite faces of the box, may include raised projections, in particular in the form of diamond tips, to improve the acoustic attenuation of noises carried by the air circulating in space intermediate.

• La Figure 1 est une vue en perspective partielle d'un châssis de fenêtre à double vitrage, muni du dispositif selon l'invention.
• La Figure 2 est une vue en coupe transversale, à plus grande échelle, d'une partie du caisson entrant dans la réalisation de ce dispositif.

Other characteristics of a sound silencing device established in accordance with the invention will become more apparent from the following description of an exemplary embodiment, given by way of non-limiting example, with reference to the appended drawing in which:

• Figure 1 is a partial perspective view of a double glazed window frame, provided with the device according to the invention.
• Figure 2 is a cross-sectional view, on a larger scale, of a part of the box used in the production of this device.

In Figure 1, reference 1 designates as a whole a window frame or the like, comprising in particular a metal support profile 2 and double glazing 3, consisting of two parallel panes, respectively 4 and 5, delimiting between them a space 6 in which a air blade.

In itself well known in the art, the window 4 for example is held between a support element 7 belonging to profile 2 and an external glazing bead 8, added on this profile, the support element and the glazing bead being provided with seals, 9 and 10 respectively. The window 4 rests on a support wedge 11 via an element flexible 12.

Similar arrangements can be implemented for mounting and maintaining the second window 5, but do not are not illustrated in the drawing. In addition, it must be understood that these provisions are given only for example and do not directly matter to the invention.

In order to allow the "breathing" of the air space contained in the intermediate space 6 which separates the panes 4 and 5, in particular to authorize a gas exchange with the outside and pressure balancing, the profile 2 of the chassis 1 comprises at least one communication opening 13, connecting the outside atmosphere with space 6, this opening being here delimited by two parallel walls 14 and 15 between which is arranged a filter (16), which in the case considered is represented in the form of a tampon of a material whose structure allows the passage of air and water vapor but prevents that of any solid body, in particular dust and insects.

Of course, the filter used could have a different structure, for example being made up of a canvas, in particular of a polyamide material, forming a screen, with a sufficiently narrow mesh to prevent the introduction of any dirt in the space 6.

In accordance with the invention, there is, on top of the communication opening 13 an elongated box 17, of form rectangular, preferably made by molding a elastomeric or similar material, the underside 18 of which is open and bears against the wall 19 of the profile 2 between the parallel panes 4 and 5.

In its end faces, respectively 20 and 21, the box has cutouts such as 22, allowing exhaust air to the interior of the intermediate space 6, in which it can then move freely, avoiding its condensation on the glass surfaces directed towards this space.

To produce according to the invention an appropriate deafening noise carried by the air thus circulated by the outside towards the inside of the intermediate space, the box 17 is subdivided into a plurality of adjoining rooms and successive such as 24 and 25, delimited between the walls parallel and opposite sides 26 and 27 of the box and a series of transverse partitions 28 (see in particular the view in enlarged section of Figure 2), which extend perpendicular to these walls and form between them, the interior of each of the successive chambers 24 and 25, a baffle path allowing air passing through filter 16 in the opening 13 and penetrating under the box 17, to undergo multiple reflections on these walls and partitions before evacuate out of this box by the cutouts 22 of the faces end 20 and 21.

Advantageously, the walls of the partitions 28, as well as the opposite faces 26 and 27 of the box, may include a multiplicity of diamond point projections (not shown), which further improve the deafening effect sound, in particular as envisaged in FR-A-2 728 600, filed in the name of the Company plaintiff.

This produces a very simple design device which keeps all the advantages of breathable glazing, with air circulation in the space between the two panes parallels of this glazing, but removing the inconvenience of this type of achievement which leads to sound insulation relatively poor. With the device of the invention, the isolation obtained is in every way comparable to that of a glazing comprising a closed and sealed intermediate space.

Of course, it goes without saying that the invention is not limited to the example of embodiment more especially described above in reference to the accompanying drawing; on the contrary, she embraces all variants. In particular, the box and the filter that it covers could be made in one piece and not separately as in this example.

Claims (4)

1. A sound deadening device for use with insulating double glazing (3) comprising a support frame (1) for two parallel panes of glass (4, 5) defining between them an intermediate space (6) containing a layer of air, said space being put into communication with the outside atmosphere via at least one communication opening (13) provided in the frame and in which a filter (16) is mounted to prevent dust or other solid bodies from penetrating into the space, the device being characterized in that it includes a rectangular box (17) mounted inside the intermediate space (6) in register with the communication opening (13), said box being pressed against the frame and covering the opening (13) over the filter (16), and having at least one cutout (22) for evacuating air into the intermediate space (6) and a plurality of partitions (28) defining a baffle path inside the inside volume of the box (17) for the flow of air from the outside to the inside of said intermediate space (6).
2. A device according to claim 1, characterized in that the box (17) is made of a flexible material, in particular an elastomer or any other analogous material having absorbent properties from the acoustic point of view, being made by molding or any other suitable method.
3. A device according to claim 1 or 2, characterized in that the box (17) has a plurality of transverse partitions (28) disposed as a baffle and extending perpendicularly to the facing parallel faces (26, 27) of the box.
4. A device according to claim 3, characterized in that the walls of the partitions (28) and the facing faces (26, 27) of the box (17) can have projections in relief, in particular in the form of diamond points.

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