Glazing with improved sound insulation and moisture absorption performance

Abstract

Glazing with improved sound insulation and moisture absorption performance. The invention relates to glazing (10; 30; 40) comprising at least two glazed panes (7; 27; 37) forming a cavity between them, wherein the cavity comprises a multi-chamber device including at least one first plate (3; 23), said first plate (3; 23) comprising a plurality of perforations (6) arranged periodically and delimiting a first chamber (2) disposed within the cavity, said perforations providing fluidic communication between said first chamber (2) and a portion of the cavity external to the multi-chamber device, the multi-chamber device further comprising at least one second chamber (2') containing a desiccant, the second chamber being disposed outside the first chamber. Figure for the abstract: Fig. 1

Description

Title of the invention: Glazing with improved acoustic insulation and moisture absorption performance Prior art

[0001] The present invention belongs to the general field of glazing manufacturing. It relates more particularly to a multi-chamber device configured to improve the acoustic insulation performance of a glazing unit as well as to limit the presence of humidity between glazed walls of said glazing unit. It also relates to a glazing unit comprising at least one such device. The invention finds a particularly advantageous, although in no way limiting, application in the case of building glazing.

[0002] Double glazing consisting of two panes separated by a cavity filled with gas, typically air, is conventionally used in windows and building facades for its thermal and acoustic insulation performance.

[0003] However, the loss of sound transmission caused by such double glazing decreases for frequencies surrounding the so-called "mass / spring / mass" frequency corresponding to the resonance frequency of the double glazing and located in the low frequencies. This phenomenon, called the mass / spring / mass effect, is due to significant variations in pressure in the air cavity at the mass / spring / mass frequency.

[0004] Also, in order to improve the acoustic insulation performance of glazing, different solutions have been developed. For example, document WO 2022 / 234237 relates to a glazing comprising at least two glazed walls forming a cavity between them, in which the cavity comprises at least one device comprising at least one plate, said plate comprising a plurality of perforations arranged periodically and delimiting a chamber arranged in the cavity.

[0005] Document WO 2011 / 04681Al describes an insulating glazing comprising at least two flat parallel panes, positioned on either side of a closed spacer profile, in such a way that a cavity is created. In the cavity between the two parallel panes and at a distance from the spacer profile, an elongated perforated wall element dividing the cavity is arranged.

[0006] Beyond the acoustic improvement of the glazing, the solutions envisaged are also subject to problems of managing the presence of humidity between the panes forming a glazing. More particularly, it is a question of being able to absorb the residual water vapor in the cavity between the panes during the manufacture of the glazing, and during its use.

[0007] There is therefore a real need to provide a system for improving the acoustic insulation properties of glazing, particularly at low frequencies, as well as the latter's performance in terms of moisture absorption. Statement of the invention

[0008] The present invention aims to remedy all or part of the drawbacks of the prior art, in particular those set out above, by proposing a solution which makes it possible to obtain glazing which is much more effective than those of the solutions of the prior art in terms of acoustic insulation but also of absorption of humidity between glazed walls of said glazing.

[0009] Thus, and according to a first aspect, the invention relates to a glazing comprising at least two glazed walls forming a cavity between them, in which the cavity comprises a multi-chamber device comprising at least a first plate, said first plate comprising a plurality of perforations arranged periodically and delimiting a first chamber arranged in the cavity, said perforations placing said first chamber and a portion of the cavity external to the multi-chamber device in fluid communication, the multi-chamber device further comprising at least a second chamber containing a desiccant, the second chamber being arranged outside the first chamber.

[0010] In particular embodiments, the glazing may further comprise one or more of the following characteristics, taken individually or in all technically possible combinations.

[0011] In embodiments, said second chamber is delimited by at least one second plate.

[0012] In embodiments, the second plate comprises a plurality of perforations.

[0013] In embodiments, a porous absorbent material is present within said first chamber, preferably selected from the group consisting of mineral wools, textile fibers, polymeric foams and combinations thereof.

[0014] In embodiments, the device comprises a profile or box formed from a plurality of walls, the first plate being one of the walls of the profile or box, and the first chamber being an internal space of the profile or box delimited by the walls.

[0015] In embodiments, the device comprises a rectilinear bar forming the first plate, the first chamber being delimited by the first plate and the second plate or by the first plate and an edge of the glazing.

[0016] In embodiments, the device comprises: - a profile or box formed from a plurality of walls, the second plate being one of the walls of the profile or box, and the second chamber being an internal space of the profile or box delimited by the walls, or - a rectilinear bar forming the second plate, and the second chamber being delimited by the second plate and an edge of the glazing or by the first plate and the second plate.

[0017] In embodiments, the second chamber is arranged between the first chamber and an edge of the glazing.

[0018] In embodiments, the first chamber and the second chamber are arranged next to each other along the edge of the glazing, the device preferably comprising at least one box formed from a plurality of walls.

[0019] In embodiments, the desiccant comprises granules.

[0020] In embodiments, the first plate comprises at least three perforations, preferably at least four perforations.

[0021] In embodiments, the device comprises at least two first plates, preferably at least three first plates, each comprising a plurality of perforations arranged periodically and delimiting a first chamber arranged in the cavity, and preferably the periodicities of the perforations of at least two of the first plates, more preferably of at least three first plates, are different from each other.

[0022] In embodiments, the first chamber that said first plate delimits is configured to resonate at low frequency and preferably at the mass / spring / mass frequency of the glazing.

[0023] In embodiments, the device is positioned in a peripheral area of ​​the glazing cavity.

[0024] In embodiments, the glazing is building glazing, such as building facade, window or door glazing or interior glazing.

[0025] The invention also relates to a spacer device comprising a multi-chamber device comprising at least a first plate, said first plate comprising a plurality of perforations arranged periodically and delimiting a first chamber, the multi-chamber device further comprising at least a second chamber containing a desiccant, the second chamber being arranged outside the first chamber, said spacer device being suitable for the manufacture of a glazing unit as described above.

[0026] The present invention makes it possible to meet the need expressed above. It provides more particularly a glazing device making it possible to obtain glazing having improved acoustic insulation, in particular in the low and medium frequencies, but also in high frequencies, while making it possible to meet the need for moisture absorption between the glass walls of said glazing.

[0027] This is achieved by the presence, in the device, of a first plate comprising a plurality of perforations arranged periodically, said first plate allowing the formation of a first chamber. The combination of the presence of said first chamber with the presence of perforations on the plate, these perforations being periodic, allows the creation of resonators making it possible to absorb at least a portion of the sound energy in the cavity of the glazing formed by the two glazed walls, which makes it possible to reduce the transmission of sound through the glazing. In particular, the resonators absorb the sound energy significantly for frequencies close to their resonance frequency(ies).In addition, the absorption of energy also for the harmonic frequencies of the resonators as well as physical phenomena related to the modification of the properties of the gas cavity of the glazing, due to the presence of the resonators, make it possible to also improve the acoustic insulation at frequencies higher than the resonant frequencies of the resonators.

[0028] Furthermore, the present invention also makes it possible to meet the need for moisture absorption between glass walls of said glazing. This is accomplished by the presence of a second chamber containing a desiccant, said desiccant being configured to absorb moisture between glass walls of said glazing. A chamber allocated to a desiccant makes it possible to simplify the process of filling the desiccant during the manufacture of double glazing, by avoiding the need to adapt a means of storing devices that contain a desiccant. Indeed, thanks to the invention, it is possible to manufacture the multi-chamber device in a first location while leaving the second chamber empty and to fill the second chamber at the last moment, in a second location, namely just before the moment of mounting the device between the two glass walls the second chamber to form the glazing.

[0029] It should be noted that the various components forming the device according to the invention may be opaque or transparent or semi-transparent. This makes it possible to improve the visual appearance of the glazing according to the invention.

[0030] Such a multi-chamber device configuration can be advantageous, particularly when the first chamber comprises a porous absorbent material, because chemical interactions between the porous absorbent material and the desiccant can be avoided.

[0031] Furthermore, the multi-chamber device according to the invention does not require complex and specific processes and tools, which allows simple manufacturing. Brief description of the drawings

[0032] Other characteristics and advantages of the present invention will emerge from the description given below, with reference to the appended drawings which illustrate an exemplary embodiment thereof without any limiting character. In the figures: [Fig.l], [Fig.l] represents a schematic and perspective view of an example of a multiple-chamber device (first variant) according to the invention; [Fig.2], [Fig.2] represents on its left part an example of glazing according to the invention and, on its right part, an enlarged and perspective schematic view of the device of [Fig.l] present in this example of glazing; [Fig.3], [Fig.3] represents on its left part another example of glazing according to the invention (second variant) and, on its right part, an enlarged and perspective schematic view of another example of the multi-chamber device present in this example of glazing; [Fig.4], [Fig.4] schematically represents a particular mode of glazing according to the invention comprising another example of device (third variant); [Fig.5], [Fig.5] represents a schematic top view (seen from the cavity) of another example (fifth variant) of a multi-chamber device according to the invention; and [Fig.6], [Fig.6] is a longitudinal sectional view of the device of [Fig.5].

[0033] Description of embodiments

[0034] The invention is now described in more detail and in a non-limiting manner in the following description.

[0035] The invention relates firstly to a multi-chamber device for glazing.

[0036] The remainder of the description aims firstly to set out, according to embodiments, aspects of configuration of said device allowing the glazing equipped therewith to provide excellent performance in terms of acoustic insulation.

[0037] The configuration aspects of the device allowing the glazing equipped with it to significantly limit the presence of humidity between the glazed walls of the glazing are described later.

[0038] The glazing may be any type of glazing comprising at least two glazed walls defining a cavity between them. For the purposes of the present invention, the cavity of a glazing is defined as being the volume comprised between two glazed walls of said glazing. For the cavity of the glazing, a thickness corresponding to the distance between the two glazed walls and a length corresponding to the dimension of the cavity in a direction perpendicular to the direction of the thickness of the cavity may be defined.

[0039] The multi-chamber device according to the invention may be a spacer device for glazing. By "spacing device" is meant any device allowing the spacing distance between the glass walls of the glazing in which it is intended to be placed to be fixed.

[0040] Alternatively, the device according to the invention may not be used as a spacing device.

[0041] The device according to the invention comprises at least a first plate comprising a plurality of perforations arranged periodically (also called “perforated plate” hereinafter).

[0042] Preferably, the first plate of the device comprises, or is made of, a metallic material, such as aluminum and / or stainless steel, and / or a polymeric material, such as polyethylene, polycarbonate, polypropylene, polystyrene, polybutadiene, polyisobutylene, polyester, polyurethane, polymethyl methacrylate, polyacrylate, polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylonitrile, butadiene styrene, acrylonitrile styrene acrylate, a styrene-acrylonitrile copolymer, or a combination thereof, optionally reinforced with glass fibers.

[0043] The first plate comprises two main faces opposite each other and carrying the perforations, called in the present text "external face" (corresponding to the face intended to be closest to the edge of the glazed walls of the glazing) and "internal face" (corresponding to the face intended to face the center of the cavity formed between the glazed walls of the glazing).

[0044] By "edge" of a glazed wall is meant one side of this glazed wall (which extends in a direction perpendicular to the thickness of the glazing between the glazed walls). For example, for a glazed wall of rectangular or square shape, the edges correspond to the four sides of the rectangle or square. By "edge" of the glazing is meant a peripheral end of the glazing delimited by corresponding edges facing the glazed walls.

[0045] For the first perforated plate, a length can be defined, corresponding to the largest dimension of the first plate in the plane of its main faces (also called the "main plane of the first plate"), a width, corresponding to the dimension of the first plate in a direction perpendicular to the direction of the length of the first plate, in the main plane of the first plate, and a thickness, corresponding to the dimension of the first plate in a direction perpendicular to the main plane of the first plate (and therefore corresponding to the dimension of the first plate between its two main faces).

[0046] The first perforated plate is preferably rectangular parallelepiped (i.e. it has a constant length, width and thickness).

[0047] When the device according to the invention is a spacing device, the width of the first perforated plate preferably determines the distance of the spacing between the glass walls (i.e. the thickness of the cavity between the glass walls) of the glazing in which the spacer device is intended to be used. The width of the first plate may be from 6 to 30 mm, preferably from 10 to 20 mm, for example 16 mm or 20 mm, particularly in embodiments in which the device is a spacer device.

[0048] The thickness of the first perforated plate is advantageously from 0.1 to 15 mm, more preferably from 0.2 to 1 mm. In particular, the first perforated plate may have a thickness of 0.1 to 0.2 mm, or from 0.2 to 0.4 mm, or from 0.4 to 0.6 mm, or from 0.6 to 0.8 mm, or from 0.8 to 1 mm, or from 1 to 1.2 mm, or from 1.2 to 1.5 mm, or from 1.5 to 2 mm, or from 2 to 3 mm, or from 3 to 4 mm, or from 4 to 5 mm, or from 5 to 10 mm, or from 10 to 15 mm.

[0049] The first plate comprises a plurality of perforations arranged periodically. By "plurality of perforations" is meant at least two perforations. More particularly, the first plate may comprise two, or three, or at least three, or four, or at least four, or five, or at least five, or six, or at least six, or seven, or at least seven, or eight, or at least eight, or nine, or at least nine, or ten, or at least ten, perforations arranged periodically. The more perforations the first plate comprises arranged periodically, the more the acoustic insulation of the glazing in which the device is present is improved. In a particularly preferred manner, the first plate comprises at least three perforations, more preferably at least four perforations, arranged periodically.

[0050] By "periodically arranged perforations" is meant that said perforations are identical and are present at regular intervals in the first plate (i.e. the distance between the centers of two adjacent perforations is constant). The perforations are made over the entire thickness of the first plate (they extend from the internal face of the first plate to its external face) and put the spaces located on either side of said first plate into fluid communication (i.e. they allow the circulation of a fluid, and more particularly of a gas, from one space to the other). Advantageously, the periodic perforations are all aligned, more preferably along a longitudinal axis of the first plate (i.e. along the direction of its length).Even more advantageously, the perforations are arranged along a longitudinal axis of the first plate located in the middle of the width of the first plate.

[0051] The perforations may have any suitable shape. In embodiments, they have a cross-section, in the main plane of the first plate, which is circular or substantially circular.

[0052] Advantageously, the perforations of the first plate are microperforations. By "microperforations" is meant holes whose diameter or the maximum dimension (in the main plane of the first plate) is less than or equal to 8 mm. Preferably, the perforations have a diameter, or a maximum dimension (in the main plane of the first plate) of 0.2 to 8 mm, more preferably of 0.5 to 8 mm. In embodiments, the diameter or the maximum dimension of the perforations may be 0.2 to 0.5 mm, or 0.5 to 1 mm, or 1 to 2 mm, or 2 to 3 mm, or 3 to 4 mm, or 4 to 5 mm, or 5 to 6 mm, or 6 to 7 mm, or 7 to 8 mm.

[0053] In a particularly preferred manner, the periodic perforations are distributed over the entire length of the first plate. Alternatively, the perforations may be arranged periodically over only a portion of the length of the first plate, for example over a portion of the first plate having a length less than or equal to 90%, or less than or equal to 80%, or less than or equal to 70%, or less than or equal to 60%, or less than or equal to 50%, or less than or equal to 40%, or less than or equal to 30%, or less than or equal to 20%, or less than or equal to 10%, of the length of the first plate.

[0054] For each perforation, a geometric center of said perforation can be defined (hereinafter simply called "center"). The distance between the centers of two adjacent perforations is preferably 5 to 200 mm, more preferably 10 to 110 mm. The distance between the centers of two adjacent periodic perforations may be 5 to 10 mm, or 10 to 20 mm, or 20 to 30 mm, or 30 to 40 mm, or 40 to 50 mm, or 50 to 60 mm, or 60 to 70 mm, or 70 to 80 mm, or 80 to 90 mm, or 90 to 100 mm, or 100 to 110 mm, or 110 to 120 mm, or 120 to 140 mm, or 140 to 160 mm, or 160 to 180 mm, or 180 to 200 mm.

[0055] Advantageously, the open area ratio (i.e. the ratio of the surface area of ​​all the perforations arranged periodically to the total surface area of ​​the first plate (including the surface area of ​​the perforations)) is from 0.01 to 8%, preferably from 0.05 to 0.8%. The open area ratio can be 0.01 to 0.05%, or 0.05 to 0.1%, or 0.1 to 0.2%, or 0.2 to 0.3%, or 0.3 to 0.4%, or 0.4 to 0.5%, or 0.5 to 0.6%, or 0.6 to 0.7%, or 0.7 to 0.8%, or 0.8 to 0.9%, or 0.9 to 1%, or 1 to 2%, or 2 to 3%, or 3 to 4%, or 4 to 5%, or 5 to 6%, or 6 to 7%, or 7 to 8%.

[0056] The first perforated plate delimits a first chamber, in the device itself or in the glazing in which it is arranged. The first chamber is located inside the cavity of the glazing. The periodic perforations of the first plate put the space delimited by the first chamber and a part of the cavity outside the multi-chamber device (i.e. a part of the cavity which is not occupied by the device) into fluid communication. In other words, they allow the circulation of a fluid, and more particularly of a gas, between the space delimited by the first chamber and the part of the cavity external to the device.

[0057] The thickness of the first chamber is preferably from 2 to 200 mm, more preferably from 5 to 50 mm. The thickness of the first chamber corresponds to the dimension of the first chamber in a direction perpendicular to the main plane of the first plate. In embodiments, the first chamber has a thickness of 2 to 5 mm, or 5 to 10 mm, or 10 to 20 mm, or 20 to 30 mm, or 30 to 40 mm, or 40 to 50 mm, or 50 to 60 mm, or 60 to 70 mm, or 70 to 80 mm, or 80 to 90 mm, or 90 to 100 mm, or 100 to 120 mm, or 120 to 140 mm, or 140 to 160 mm, or 160 to 180 mm, or 180 to 200 mm.

[0058] The sizing and configuration of the first plate, its perforations and the first chamber can be chosen according to the frequency at which the assembly formed by the first plate and the first chamber is desired to resonate. Indeed, the relationship between the resonance frequency / of the first perforated plate and the thickness of the first plate, the thickness of the first chamber, the spacing between the perforations and the size and distribution of the perforations can be estimated by the formula:

[0059] [Math.l] f = 54000.^;,,

[0060] In this equation 1, o is the open area ratio (dependent on the size of the perforations and their distribution), L is the thickness of the first plate in m, D is the thickness of the first chamber in m and d is the distance between the centers of two adjacent perforations in m.

[0061] Advantageously, the system consisting of the first plate and the first chamber is configured to resonate at low frequencies. By "low frequencies" is meant sound waves with a frequency of less than 300 Hz. For example, the system consisting of the first plate and the first chamber may be configured to resonate at a frequency of less than or equal to 250 Hz, or less than or equal to 225 Hz, or less than or equal to 200 Hz, or less than or equal to 175 Hz, or less than or equal to 150 Hz. In other embodiments, the system consisting of the first plate and the first chamber may be configured to resonate at a frequency of less than or equal to 400 Hz, or less than or equal to 350 Hz.

[0062] The first plate preferably comprises a single series of perforations arranged periodically. Alternatively, it may comprise several series of perforations arranged periodically in the first plate, such as at least two series or at least three series, each series being different from the others (for example, the size of the perforations and / or the distance between the centers of two perforations adjacent may be different in each series). When the first plate comprises several series of periodic perforations, each series is located in a different portion of the first plate (depending on its length). The presence of several different series of periodic perforations allows the system consisting of the first plate and the first chamber to resonate at several frequencies, each portion of the assembly of the first plate and the first chamber which comprises a different series of periodic perforations having a different resonance frequency.

[0063] The first chamber may comprise a porous absorbent material inside. Preferably, the term "porous absorbent material" means a material characterized by a porosity greater than or equal to 0.7 and / or a resistivity to the passage of air of between 5,000 and 150,000 Nsm4. The porosity of the material may be measured using a porosimeter according to the fluid saturation method, by mercury intrusion. The resistivity to the passage of air may be measured according to standard NF EN ISO 9053-1. The presence of such a porous absorbent material in the first chamber may make it possible to increase the acoustic performance of the device and therefore to further improve the acoustic insulation of the glazing in which it is placed.

[0064] The porous absorbent material may have a porosity greater than or equal to 0.75, or greater than or equal to 0.8, or greater than or equal to 0.85, or greater than or equal to 0.9, or greater than or equal to 0.95, for example a porosity of 0.7 to 0.75, or 0.75 to 0.8, or 0.8 to 0.85, or 0.85 to 0.90, or 0.90 to 0.95, or 0.95 to 0.99. Particularly preferably, the porous absorbent material has a porosity of 0.7 to 0.99, and more preferably greater than or equal to 0.9. The air resistance of the porous absorbent material may be from 5,000 to 10,000 Nsm 4, or from 10,000 to 20,000 Nsm 4, or from 20,000 to 40,000 Nsm 4, or from 40,000 to 60,000 Nsm4, or from 60,000 to 80,000 Nsm4, or from 80,000 to 100,000 Nsm 4, or from 100,000 to 120,000 Nsm 4, or from 120,000 to 140,000 Nsm4, or from 140,000 to 150,000 Nsm 4. Preferably, the porous absorbent material has a air resistance of air which is worth from 20,000 to 100,000 Nsm4.

[0065] The porous absorbent material is advantageously a textile fibrous material, a mineral wool, a polymer foam, or a combination thereof. The textile fibrous material may be a textile made of cotton fibers, linen fibers, hemp fibers, coconut fibers, polyester fibers, cellulose fibers, or a combination thereof. The mineral wool may be selected from the group consisting of glass wool, rock wool, and combinations thereof. Preferably, the polymer foam comprises (or consists of) open cells. The polymer foam may be selected from the group consisting of melamine foams, polyurethane foams, polyolefin foams (and in particular polyethylene), silicone foams, and combinations thereof.

[0066] The porous absorbent material may be held in a fixed position inside the first chamber. The porous absorbent material may fill the entire first chamber. It is therefore understood that maintaining said porous absorbent material in a fixed position results from this configuration within the first chamber. Alternatively, the porous absorbent material may be present in only a portion of the first chamber, for example the volume of the porous absorbent material may be from 2 to 20%, or from 20 to 40%, or from 40 to 60%, or from 60 to 80%, or from 80 to 98%, of the total volume of the first chamber. In this case, the absorbent material is held fixed inside the first chamber according to any method known to those skilled in the art, for example by using suitable adhesive means.

[0067] Alternatively, or additionally, the first chamber may comprise a gas. The gas may in particular be air and / or argon, and / or carbon dioxide, and / or krypton and / or xenon.

[0068] The perforations of the first plate may be covered by a fabric, in part or, preferably, in full. For example, the fabric may be glued by any suitable means to the first plate, such as to the inner face of the first plate. Alternatively, or additionally, the fabric may be arranged on a porous absorbent material as described above, for example glued to said porous absorbent material, the porous absorbent material being placed inside the first chamber, so that the fabric is against all or part, preferably all, of the perforations. The fabric thus forms a screen having a certain resistivity against the perforations.Without wishing to be bound by a theory, the inventors believe that when the sound wave passes through the fabric to enter the first chamber, it encounters a resistivity due to the presence of the fabric, which improves the absorption of sound energy and therefore the acoustic insulation of the glazing comprising the device at low, medium and high frequencies. When the fabric is fixed on a porous absorbent material positioned in the first chamber, the acoustic insulation of the glazing is further improved. The fabric advantageously has a thickness ranging from 0.1 to 3 mm, preferably from 0.2 to 1 mm. The fabric can be made of any woven natural or synthetic fibers, such as for example cotton fibers and / or linen fibers. The fabric preferably has a porosity of 0.07 to 0.99, and more preferably of 0.5 to 0.99, and / or a resistivity to the passage of air of 90,000 to 3,500,000 Nsm4, more preferably of 300,000 to 3,000,000 Nsm 4.Air resistance and porosity can be measured as above. The fabric may have . a porosity of 0.07 to 0.2, or 0.2 to 0.4, or 0.4 to 0.6, or 0.6 to 0.8, or 0.8 to 0.99. The air resistance of the fabric can be from 90,000 to 300,000 Nsm 4 , or from 300,000 to 500,000 Nsm4, or from 500,000 to 1,000,000 Nsm4, or from 1,000,000 to 1,500,000 Nsm 4, or from 1,500,000 to 2,000,000 Nsm 4, or from 2,000,000 to 2,500,000 Nsm4, or from 2,500,000 to 3,000,000 Nsm 4, or from 3,000,000 to 3,500,000 Nsm4.

[0069] Advantageously, the interior of the first chamber consists of gas and / or one or more porous absorbent materials as described above, optionally covered with a fabric as described above.

[0070] The multi-chamber device according to the invention may comprise a profile or box formed from a plurality of walls, the first plate being one of the walls of the profile or box. In this case, the first chamber is an internal space of the profile or box delimited by the walls. When the device comprises a profile or box formed from a plurality of walls, the wall facing the perforated plate may comprise at least one perforation. Everything described in relation to the perforations of the first plate applies to the perforation (or perforations) of the wall facing the first plate. Advantageously, the first plate and the wall facing the first plate comprise identical perforations in order to facilitate the manufacture of the device.

[0071] Alternatively, the multi-chamber device according to the invention may comprise a rectilinear bar forming the first plate. In this case, the first chamber is delimited by the first plate and a second plate (as described in more detail below) delimiting the second chamber or by the first plate and an edge of the glazing. It should be noted that the edge of the glazing may be delimited by a seal. The seal is described in more detail later.

[0072] As mentioned previously, the multi-chamber device according to the invention is also remarkable in that it makes it possible to significantly limit the presence of humidity between the glazed walls of the glazing. Such properties are therefore added to those described above in connection with acoustic insulation, so as to obtain glazing that is much more efficient than those of the prior art.

[0073] In its general principle, as regards the aspects linked to the limitation of the presence of humidity between the glazed walls of the glazing, the invention consists in equipping the glazing device with a second chamber containing a desiccant agent configured to absorb humidity between the glazed walls of the glazing, the second chamber being arranged outside the first chamber.

[0074] By "desiccant agent", we conventionally refer to an agent which has the property of drying out the atmosphere in which it is placed, or, in other words, to absorb all or part of the moisture contained in this atmosphere. The use of such a desiccant is based on a desire to absorb said moisture before it transforms into water.

[0075] The desiccant agent may comprise granules, preferably in a non-agglomerated manner (i.e. in an individualized manner). Said granules are for example made of molecular sieve, silica gel, calcium chloride (CaCl2), sodium sulfate (Na2SO4), activated carbon, zeolites with the chemical formulation M2 / nO.Al2O3 .xSiO2.yH2O; M may designate Ca, Mg, K, Na. Generally, any material known to those skilled in the art for producing desiccant agents may be used as granules.

[0076] The desiccant may fill the entire second chamber. Alternatively, the desiccant may be present in only a portion of the second chamber, for example the volume of the desiccant may be 2 to 20%, or 20 to 40%, or 40 to 60%, or 60 to 80%, or 80 to 98%, of the total volume of the second chamber. The absorbent material may be held fixed within the second chamber by any method known to those skilled in the art, for example by using suitable adhesive means.

[0077] In addition, the second chamber may comprise a gas. The gas may in particular be air and / or argon, and / or carbon dioxide, and / or krypton and / or xenon.

[0078] When the device according to the invention comprises a profile or box delimiting the first chamber (the first plate being one of the walls of the profile or box), the second chamber can be delimited by the profile or box (by its wall facing the first perforated plate) and by the edge of the glazing, that is to say that the second chamber can be arranged between the first chamber and an edge of the glazing.

[0079] The second chamber may also be delimited by at least one second plate.

[0080] Preferably, the second plate of the device comprises, or is made of, a metallic material, such as aluminum and / or stainless steel, and / or a polymeric material, such as polyethylene, polycarbonate, polypropylene, polystyrene, polybutadiene, polyisobutylene, polyester, polyurethane, polymethyl methacrylate, polyacrylate, polyamide, polyethylene terephthalate, polybutylene terephthalate, acrylonitrile, butadiene styrene, acrylonitrile styrene acrylate, a styrene-acrylonitrile copolymer, or a combination thereof, optionally reinforced with glass fibers.

[0081] Everything described in this text in relation to the two main faces (external face and internal face), the shape and the dimensions (length, width, thickness) of the first plate applies to the second plate.

[0082] The second plate may comprise a plurality of perforations. The "plurality of perforations" is as defined above in relation to the first plate; it may be periodic or non-periodic. The perforations may be arranged in any suitable manner, allowing the desiccant to absorb moisture between the glass walls of the glazing.

[0083] The perforations of the second plate may have any suitable shape. In embodiments, they have a cross-section (i.e., in the main plane of the second plate) which is circular or substantially circular.

[0084] Advantageously, the perforations of the second plate are microperforations. The “microperforations” are as defined above in relation to the first plate.

[0085] In a particularly preferred manner, the perforations of the second plate are distributed over the entire length of the second plate. Alternatively, the perforations may be arranged over only a portion of the length of the second plate, for example over a portion of the second plate having a length less than or equal to 90%, or less than or equal to 80%, or less than or equal to 70%, or less than or equal to 60%, or less than or equal to 50%, or less than or equal to 40%, or less than or equal to 30%, or less than or equal to 20%, or less than or equal to 10%, of the length of the second plate.

[0086] For each perforation of the second plate, the distance between the geometric centers (as defined above in relation to the first plate) of two adjacent perforations is preferably from 5 to 200 mm, more preferably from 10 to 110 mm. The distance between the centers of two adjacent perforations may be 5 to 10 mm, or 10 to 20 mm, or 20 to 30 mm, or 30 to 40 mm, or 40 to 50 mm, or 50 to 60 mm, or 60 to 70 mm, or 70 to 80 mm, or 80 to 90 mm, or 90 to 100 mm, or 100 to 110 mm, or 110 to 120 mm, or 120 to 140 mm, or 140 to 160 mm, or 160 to 180 mm, or 180 to 200 mm.

[0087] Advantageously, the open area ratio (i.e. the ratio of the surface area of ​​all the perforations of the second plate and the total surface area of ​​the second plate (including the surface area of ​​the perforations)) is from 0.01 to 10%, preferably from 0.05 to 1%. The open area ratio can be 0.01 to 0.05%, or 0.05 to 0.1%, or 0.1 to 0.2%, or 0.2 to 0.3%, or 0.3 to 0.4%, or 0.4 to 0.5%, or 0.5 to 0.6%, or 0.6 to 0.7%, or 0.7 to 0.8%, or 0.8 to 0.9%, or 0.9 to 1%, or 1 to 2%, or 2 to 3%, or 3 to 4%, or 4 to 5%, or 5 to 6%, or 6 to 7%, or 7 to 8%.

[0088] The perforations of the second plate may be covered by a fabric, in part or, preferably, in full. For example, the fabric may be glued by any suitable means to the second plate, such as to the inner face of the second plate. Alternatively, or additionally, the fabric may be arranged on the desiccant, for example glued to said desiccant, so that the fabric is against all or part, preferably all, of the perforations. The fabric thus forms a screen against the perforations having a certain resistivity.

[0089] The device according to the invention may comprise a profile or box formed from a plurality of walls, the second plate being one of the walls of the profile or box. In this case, the second chamber is an internal space of the profile or box delimited by the walls. When the second chamber is arranged above the first chamber (i.e., when the first chamber is arranged between the second chamber and the edge of the glazing), the second plate and the wall facing the second plate may comprise perforations. Everything described in relation to the perforations of the second plate applies to the perforations of the wall facing the second plate. Advantageously, the second plate and the wall facing the second plate comprise identical perforations in order to facilitate the manufacture of the device.Thus, the first chamber may be in fluid communication with the portion of the cavity external to the device, via the perforations of the second plate, the perforations of the wall facing the second plate as well as the perforations of the first plate of the first chamber.

[0090] Alternatively, the device according to the invention may comprise a rectilinear bar forming the second plate. In this case, the second chamber may be delimited by the second plate and an edge of the glazing (for example, when the second chamber is arranged between the first chamber and the edge of the glazing, or when the second chamber and the first chamber are arranged next to each other, as described below), or by the second plate and the first plate of the first chamber (for example, when the first chamber is arranged between the second chamber and the edge of the glazing).

[0091] When the device comprises a profile (or box) delimiting the first chamber as well as a profile (or box) delimiting the second chamber, the two profiles (or the two boxes, or a profile and a box) can be formed from a single piece, in other words they can form a single profile comprising the two chambers. In this case, a wall of the profile (or box) delimiting the first chamber can be merged with a wall of the profile of the profile (or box) delimiting the second chamber (as shown in [Fig.4]). The single piece comprising the two chambers can be manufactured by extrusion or molding, for example. This simplifies the manufacturing process of the device.

[0092] With reference to [Fig.l], according to a first variant, the multi-chamber device 100 according to the invention comprises the first chamber 2 and the second chamber 2' containing a desiccant 70. The two chambers are each delimited by a rectilinear tubular profile. By "tubular profile" is meant a hollow profile, i.e. comprising a cavity or chamber. By "rectilinear profile" is meant that the profile is straight in the direction of its length (a longitudinal axis of the profile can therefore be defined). According to this variant, the device is advantageously a spacing device.

[0093] The tubular profile 1 delimiting the first chamber 2 and the tubular profile 1' delimiting the second chamber 2' each comprise at least one upper wall 3, 3', one lower wall 4, 4' and two side walls 5, 5' defining the chamber 2, 2' of the profile. In the present text, the terms "upper" and "lower" are used with reference to the orientation of the device 100 shown on the right-hand side of [Fig.2]. However, the device 100 can of course have any possible orientation, such as for example an orientation in which the longitudinal axis of the profile is vertical or an orientation in which the upper wall is below the lower wall (as shown on the left-hand side of [Fig.2]).

[0094] The upper wall 3 of the first chamber comprises a plurality of perforations 6 arranged periodically. Thus, the profile 1 delimiting the first chamber 2 according to the invention is also called “perforated (tubular) (rectilinear) profile” in the present text. The perforations 6 are made over the entire thickness of the upper wall and put the first chamber 2 delimited by the profile 1 into fluid communication with the environment external to the profile (that is to say they allow the circulation of a fluid, and more particularly of a gas, from the first chamber 2 of the profile 1 to the external environment and vice versa).

[0095] In this first variant, the upper wall 3 of the profile 1 corresponds to the first plate comprising a plurality of perforations arranged periodically of the device described above, and the chamber 2 of the profile 1 corresponds to the first chamber delimited by the first plate described above. Thus, everything described in the present text in relation to the first perforated plate and in relation to the first chamber delimited by the first perforated plate applies to the upper wall 3 of the profile 1 and to the chamber 2 of the profile 1, respectively. Similarly, the upper wall 3' of the profile 1' corresponds to the second plate of the device described above, and the chamber 2' delimited by the profile 1' corresponds to the second chamber delimited by the second plate described above.Thus, everything described in this text in relation to the second plate and in relation to the second chamber delimited by the second plate applies to the upper wall 3' of the profile 1' and to the chamber 2' of the profile 1', respectively.

[0096] In this first variant, it is possible to define for the profile 1,1' a length corresponding to the dimension of the profile 1,1' along the longitudinal axis of the profile 1, 1' rectilinear, a width corresponding to the dimension of the profile 1,1' in a direction perpendicular to the longitudinal axis of the profile 1,1' rectilinear, in the main plane of the upper wall 3, 3' of the profile 1, 1', and a thickness corresponding to the dimension of the profile 1,1' in a direction perpendicular to the main plane of the upper wall 3, 3' (and therefore corresponding to the dimension of the profile 1, 1' between the upper wall 3, 3' and the lower wall 4, 4'). The profile 1 containing the first chamber 2 may have the same dimensions as the profile 1' containing the second chamber 2', or different dimensions (for example the same length or a different length, the same width or a different width, the same thickness or a different thickness).

[0097] Where the device is a spacer device, the width of the profile preferably determines the distance of the spacing between the glass walls (i.e. the thickness of the cavity between the glass walls) of the glazing in which the device is intended to be used.

[0098] The upper wall 3, 3' and the lower wall 4, 4' of the profile 1, 1' may be connected by two side walls 5, 5' (each of the two side walls 5, 5' connecting a longitudinal edge of the upper wall 3, 3' to a longitudinal edge of the lower wall 4, 4'). In other embodiments, the upper wall 3, 3' and the lower wall 4, 4' may be connected to each other by any number of walls.

[0099] Advantageously, the main plane of the upper wall 3, 3' and the main plane of the lower wall 4, 4' are parallel to each other and, even more advantageously, they are perpendicular to the main planes of the two side walls 5, 5'. Alternatively, the main plane of the upper wall 3, 3' and the main plane of the lower wall 4, 4' are parallel to each other, and the side walls 5, 5' may form an angle of 30° to 60° with respect to the upper wall, as well as with respect to the lower wall. For example, the chamber arranged below may have side walls forming an angle of approximately 45° with respect to the upper wall and with respect to the lower wall. For example, the second chamber may have the shape of an isosceles trapezoid (perpendicular to the main planes), as shown in [Fig.4].Such a shape of the lower chamber can improve the stability of the device and facilitate the fixing of the device in the glazing and its insulation.

[0100] Preferably, the rectilinear profile 1 comprises, or is made of, a material as mentioned above in relation to the first perforated plate. Similarly, the rectilinear profile 1' comprises, or is made of, a material as mentioned above in relation to the second plate.

[0101] Preferably, the lower wall 4 and / or each of the two side walls 5 has a rectangular parallelepiped shape. Likewise, preferably, the wall lower 4' and / or each of the two side walls 5' has a rectangular parallelepiped shape.

[0102] A porous absorbent material 50 may be present inside said first chamber 2.

[0103] Although [Fig.l] only shows the perforations 6 of the upper wall 3 of the profile 1, the lower wall 4 of the profile 1 and / or the upper wall 3' of the profile 1' may also comprise perforations.

[0104] With reference to [Fig.2], the second chamber 2' is arranged between the first chamber 2 and an edge of the glazing.

[0105] In particular, as visible in [Fig.2], the first chamber 2 and the second chamber 2' are stacked on top of each other in a direction substantially perpendicular to the main plane of the first perforated plate 3.

[0106] The profile 1 delimiting the first chamber 2 and the profile 1 delimiting the second chamber 2' may be assembled together, for example by means of staples, glue, clips and / or by interlocking or welding. Alternatively, the two profiles 1, 1' may be formed from a single piece, in other words they may form a single profile comprising the two chambers. In this case, the lower wall 4 of the profile containing the first chamber 2 may be merged with the upper wall 3' of the profile containing the second chamber 2'.

[0107] The length of the upper wall 3 of the profile 1 is advantageously equal to the length of the cavity between the glazed walls 7 of the glazing 10 in which the device is intended to be placed, in the same direction.

[0108] Considering the two chambers 2 and 2' delimited by the profiles 1 and 1' does not constitute a limitation of the invention. Of course, for example, the chamber 2' comprising the desiccant can be delimited by the first chamber (the lower wall 4) and the edge of the glazing between the two glazed walls of the glazing 10. Alternatively, the chamber 2' comprising the desiccant can be delimited by a rectilinear bar forming the second plate and the edge of the glazing between the two glazed walls of the glazing 10. Alternatively, the chamber 2' comprising the desiccant can be delimited by a box, as described below.

[0109] Furthermore, considering the second chamber 2' of the profile 1' arranged between the first chamber 2 of the profile 1 and the edge of the glazing does not constitute a limitation of the invention. Of course, the first chamber 2 of the profile 1 can be arranged between the second chamber 2' of the profile 1' and the edge of the glazing.

[0110] With reference to [Fig.3], according to a second variant, the multi-chamber device 210 according to the invention comprises at least one rectilinear box. By "box" is meant a hollow closed structure, i.e. comprising at least one cavity or chamber.

[0111] The box 21 delimiting the first chamber 2 and the box 21' delimiting the second chamber 2' each comprise at least one upper wall 23, 23', one lower wall 24, 24', two longitudinal side walls 25, 25' (preferably opposite each other) and two transverse side walls 28, 28' (preferably opposite each other). By "longitudinal side wall" is meant a side wall parallel to the longitudinal axis of the rectilinear box and by "transverse side wall" is meant a side wall perpendicular to the longitudinal axis of the rectilinear box. In the present text, the terms "upper" and "lower" are used with reference to the orientation of the device 210 shown on the right part of [Fig.3]. Of course, the device can have any other possible orientation, as for example shown on the left part of [Fig.3].The upper wall 23 of the box 21 corresponds to the wall intended to face the center of the cavity formed between the glazed walls 27 of the glazing 30. The upper wall 23 is in contact with a gas blade of the glazing. The lower wall 24 corresponds to the wall of the box 21 intended to be in contact with the upper wall 23' of the box 21' delimiting the second chamber 2'. The longitudinal side walls 25 are intended to be parallel to the glass walls 27 and the transverse side walls 28 are intended to be perpendicular to the glass walls 27. The lower wall 24' corresponds to the wall of the box 21' intended to be closest to the edge of the glass walls 27 of the glazing 30, the longitudinal side walls 25' are intended to be parallel to the glass walls 27 and the transverse side walls 28' are intended to be perpendicular to the glass walls 27.

[0112] The upper wall 23 and the lower wall 24 of the box 21 may be connected by two longitudinal side walls 25 (each of the two longitudinal side walls 25 connecting a longitudinal edge of the upper wall 23 to a longitudinal edge of the lower wall 24). In other less preferred embodiments, the upper wall 23 and the lower wall 24 may be connected to each other by any number of longitudinal walls 25. The upper wall 23 and the lower wall 24 of the box 21 are preferably connected to each other by two transverse side walls 28 (each of the two transverse side walls 28 connecting a transverse edge of the upper wall 23 to a transverse edge of the lower wall 24).

[0113] Advantageously, the main plane of the upper wall 23 and the main plane of the lower wall 24 are parallel to each other. Preferably, the main planes of the longitudinal side walls 25 are parallel to each other. Preferably, the main planes of the transverse side walls 28 are parallel to each other. Even more advantageously, the main planes of the upper 23 and lower 34 walls are perpendicular to the main planes of the two longitudinal side walls 25 and to the main planes of the two transverse side walls 28. In a particularly preferred manner, the box 21 according to the invention has the shape of a parallelepiped, even more preferably the shape of a rectangular parallelepiped.

[0114] Each of the walls of the box 21 can independently have a rectangular parallelepiped shape, preferably each of the walls of the box 21 has a rectangular parallelepiped shape.

[0115] In this second variant, it is possible to define for the box 21 a length corresponding to the dimension of the box 21 along the longitudinal axis of the rectilinear box, a width corresponding to the dimension of the box 21 along a direction perpendicular to the longitudinal axis of the rectilinear box, in the main plane of the upper wall 23 of the box 21, and a thickness corresponding to the dimension of the box 21, along a direction perpendicular to the main plane of the upper wall 3 (and therefore corresponding to the dimension of the box 21 between the upper wall 3 and the lower wall 4). In a particularly preferred manner, the width of the box 21 is less than the thickness of the cavity between the glazed walls 27 (along the same direction) of the glazing 30 in which it is intended to be placed. Thus, in this variant, the device 210 is preferably not a spacing device.Preferably, at least one of the longitudinal side walls 25 (one or both) is not in contact with a glazed wall 27 when the box 21 is placed in a glazing 30. When the length of the box is less than the length of the cavity between the glazed walls, the box can be located in any location in the peripheral zone of the glazing cavity.

[0116] The width of the box 21 may be from 1 to 99% of the thickness of the cavity between the glazed walls of the glazing, for example from 1 to 10%, or from 10 to 20%, or from 20 to 30%, or from 30 to 40%, or from 40 to 50%, or from 50 to 60%, or from 60 to 70%, or from 70 to 80%, or from 80 to 90%, or from 90 to 99%, of the thickness of the cavity between the glazed walls 27. The width of the box 21 may be from 5 mm to less than the thickness of the cavity between the glazed walls 27, for example the width of the box 21 may be from 5 mm to 29 mm, or from 5 mm to 19 mm, or from 5 mm to 15 mm.

[0117] The length of the box 21 may be less than or equal to the length of the cavity between the glazed walls 27 of the glazing 30 in which it is intended to be placed, in the same direction. Preferably, it is less than the length of the cavity in the same direction. The length of the box 21 may be from 1 to 100% of the length of the cavity, for example from 1 to 10%, or from 10 to 20%, or from 20 to 30%, or from 30 to 40%, or from 40 to 50%, or from 50 to 60%, or from 60 to 70%, or from 70 to 80%, or from 80 to 90%, or from 90 to 95%, or from 95 to 100%, of the length of the cavity between the glazed walls 27. In embodiments, the length of the box 21 may be from 5 cm to the length of the cavity between the glass walls 27 (in the same direction as the length of the box 21).

[0118] Everything described above in relation to the upper wall 23, the lower wall 24, each of the two longitudinal side walls 25, and each of the transverse side walls 28 of the box 21 delimiting the first chamber 2 applies to the upper wall 23', the lower wall 24', the two longitudinal side walls 25' and the two transverse side walls 28' of the box 21' delimiting the second chamber 2' which contains a desiccant. The box 21 containing the first chamber 2 may have the same dimensions as the box 21' containing the second chamber 2', or different dimensions (for example the same length or a different length, the same width or a different width, the same thickness or a different thickness).

[0119] The upper wall 23 comprises a plurality of perforations 6 arranged periodically. The lower wall 24 or one of the longitudinal side walls 25 (intended not to be in contact with a glazed wall 27 of the glazing 30 when the box is placed in a glazing) may also comprise a plurality of perforations arranged periodically. Thus, the box 21 according to the invention is also called “perforated (rectilinear) box” in the present text. The perforations 6 are made over the entire thickness of the wall and put the first chamber of the box 21 into fluid communication with the environment outside the box 21.

[0120] In this second variant, the wall of the box 21 comprising the periodic perforations 6 corresponds to the first plate comprising a plurality of perforations arranged periodically of the device described above, and the chamber of the box 21 corresponds to the first chamber delimited by the first plate described above. Thus, everything described in the present text in relation to the first perforated plate and in relation to the first chamber delimited by the first perforated plate applies to the perforated wall of the box 21 and to the chamber of the box 21, respectively. Similarly, one of the walls of the box 21' corresponds to the second plate of the device described above, and the chamber 2' of the box 21' corresponds to the second chamber delimited by the second plate described above.Thus, everything described in this text in relation to the second plate and in relation to the second chamber delimited by the second plate applies to a wall of the box 21' and to the chamber 2' of the box 21', respectively.

[0121] Preferably, the box 21 comprises, or is made of, a material as mentioned above in relation to the first perforated plate. Similarly, the box 21' comprises, or is made of, a material as mentioned above in relation to the second plate.

[0122] The box 21 delimiting the first chamber 2 and the box 21' delimiting the second chamber 2' may be assembled together, for example by means of staples, glue, clips and / or by interlocking or welding. Alternatively, the two boxes 21, 21' may be formed from a single piece, in other words they may form a single box comprising the two chambers. In this case, the lower wall 24 of the box containing the first chamber 2 may be merged with the upper wall 23' of the box containing the second chamber 2'.

[0123] Considering the two chambers 2 and 2' delimited by the boxes 21 and 21' does not constitute a limitation of the invention. Of course, for example, the chamber 2' comprising the desiccant can be delimited by the first chamber (the lower wall 24 of the box 21) and the edge of the glazing between the two glazed walls of the glazing 30. Alternatively, the chamber 2' comprising the desiccant can be delimited by a rectilinear bar forming the second plate and the edge of the glazing between the two glazed walls of the glazing 30. Alternatively, the chamber 2' comprising the desiccant can be delimited by a profile, as described above.

[0124] Furthermore, considering the second chamber 2' of the box 21' arranged between the first chamber 2 of the box 21 and the edge of the glazing does not constitute a limitation of the invention. Of course, the first chamber 2 of the box 21 may be arranged between the second chamber 2' of the box 21' and the edge of the glazing.

[0125] [Fig. 3] illustrates the periodic perforations 6 of the upper wall 23 of the box 21. However, the lower wall 24 of the box 21 can of course comprise perforations. Similarly, the upper wall 23' of the box 21' can also comprise perforations.

[0126] With reference to [Fig.4], according to a third variant, the multi-chamber device 310 comprises a structure similar to that of the device of [Fig.2] or that of the device of [Fig.3], except that the two profiles (or boxes) are formed from a single piece, and that the shape of the second chamber is different.

[0127] According to this variant, the two profiles (or boxes) 31, 31' form a single profile (or box) comprising the two chambers 2, 2'. The lower wall of the profile (or box) delimiting the first chamber 2 (which may comprise a porous absorbent material 50) is therefore merged with the upper wall of the profile (or box) delimiting the second chamber 2' (comprising a desiccant 70), forming a separation wall 39. The separation wall 39 may comprise at least one perforation 6'.

[0128] In this variant, two side walls (longitudinal) 35' of the second chamber form an angle other than 90° with respect to the lower wall 34', thus than with respect to the dividing wall 39. Thus, the width of the lower wall of the profile (or box) 31' delimiting the second chamber may be less than that of the upper wall (i.e., the dividing wall 39), the internal space of the second chamber being flared and widening from the lower wall towards the side (longitudinal) walls 35'.

[0129] As shown in [Fig.4], the device 310 is placed in the cavity between the two glazed walls 37 of the glazing 40. The glazed walls 37 are attached to the device by an adhesive 90, such as a polyisobutylene (PIB)-based adhesive. A seal 80 is also present on the external face of the lower wall 34' of the profile (or box) delimiting the second chamber (when the second chamber is arranged between the first chamber and the edge of the glazing). More preferably, the seal extends from the external face to the edge of the glazed walls. This seal can be made with a mastic (called a "sealing mastic") based on polyurethane, polysulfide and / or silicone.

[0130] [Fig.4] illustrates the device 310 as a spacer device. However, the device according to the invention may not be a spacer device, for example when it comprises one or more perforated boxes. In this case, said device may be placed on a spacer device.

[0131] According to a fourth variant, the multi-chamber device according to the invention comprises at least one rectilinear bar. By “bar” is meant a solid of rectangular parallelepiped shape. The bar may comprise a plurality of perforations 16 arranged periodically. Thus, the bar according to the invention is also called “perforated (rectilinear) bar” in the present text. According to this fourth variant, the device is advantageously a spacing device.

[0132] In this fourth variant, the perforated bar corresponds to the first plate comprising a plurality of perforations arranged periodically in the device. Thus, everything described in the present text in relation to the first perforated plate applies to the perforated bar. In this variant, the second chamber is delimited by at least one second plate.

[0133] When the perforated bar is placed in a glazing unit (between two glazed walls of the glazing unit), the perforated bar defines a first chamber between the glazed walls. This first chamber may extend from the perforated bar to the second chamber. When the second chamber is delimited by a profile or box of a plurality of walls, the second plate being one of the walls of the profile or box, the first chamber may extend from the perforated bar to the upper wall of the profile or box (for example when the second chamber is arranged between the first chamber and the edge of the glazing unit) or from the perforated bar to the edge of the glazing unit (for example, when the first chamber and the second chamber are next to each other along the edge of the glazing, as described below, or when the first chamber is arranged between the second chamber and the edge of the glazing. When the second chamber is delimited by a rectilinear bar forming the second plate, the first chamber extends from the perforated bar to the second plate (rectilinear bar) or from the perforated bar to the edge of the glazing.

[0134] In this variant, the thickness of the first chamber corresponds to the dimension of the first chamber between the perforated bar and the second chamber or between the perforated bar and the edge of the glazing.

[0135] Advantageously, the length of the perforated bar (dimension corresponding to the largest dimension of the perforated bar) is equal to the length of the cavity between the glazed walls of the glazing in which it is intended to be placed, in the same direction.

[0136] With reference to Figures 5 and 6, according to a fifth variant of the device, the first chamber 2 and the second chamber 2' are next to each other along an edge of the glazing. Advantageously, at least one of the first chamber 2 and the second chamber 2' is delimited by a box so that the two chambers are not in fluid communication with each other in order to avoid, for example, chemical interactions between the porous absorbent material in the first chamber and the desiccant in the second chamber.

[0137] For example, in this variant, the device comprises two first chambers 2 (each capable of containing an absorbent porous material) each delimited by a perforated box (comprising the perforations 6), and a second chamber 2' (containing the desiccant) delimited by a profile. Advantageously, the upper wall of the profile delimiting the second chamber 2' comprises perforations 6'.

[0138] It should be noted that the number of first chambers and the number of second chambers do not constitute a limitation of the invention. Thus, it is possible to provide, along one edge (or along each edge) of the glazing: a single first chamber next to a single second chamber; or a single second chamber surrounded by two first chambers, as illustrated; or a single first chamber surrounded by two second chambers; or any alternation of two or more first chambers with two or more second chambers.

[0139] The device according to the invention may comprise other variants having combinations of different types of first and second chambers described above, for example, combinations of a perforated profile delimiting a first chamber and a (perforated) profile delimiting a second chamber; of a perforated profile delimiting a first chamber and a (perforated) box delimiting a second chamber; of a perforated profile delimiting a first chamber and a (perforated) bar delimiting a second chamber; of a perforated box delimiting a first chamber and a (perforated) profile delimiting a second chamber; of a perforated box delimiting a first chamber and a (perforated) box delimiting a second chamber; of a perforated box delimiting a first chamber and a (perforated) bar delimiting a second chamber; of a perforated bar delimiting a first chamber and a (perforated) profile delimiting a second chamber; of a perforated bar delimiting a first chamber and a (perforated) box delimiting a second chamber; of a perforated bar delimiting a first chamber and a (perforated) bar delimiting a second chamber.

[0140] Thus, the device according to the invention can be according to several of the variants described above at the same time. Thus, the device according to the invention can comprise both one or more perforated profiles and one or more perforated bars; both one or more perforated profiles and one or more perforated boxes; both one or more perforated bars and one or more perforated boxes; or both one or more perforated profiles, one or more perforated bars and one or more perforated boxes.

[0141] With regard to the first chamber, the device according to the invention may comprise a single first perforated plate. In particular, the device according to the invention may comprise a single rectilinear tubular profile comprising perforations in its upper wall or a single perforated rectilinear bar or a single perforated rectilinear box. However, preferably, the device comprises several first perforated plates. More particularly, it advantageously comprises several rectilinear tubular profiles each comprising an upper wall comprising perforations arranged periodically and / or several rectilinear bars comprising perforations arranged periodically and / or several rectilinear boxes comprising perforations arranged periodically in one of its walls.When the device comprises several first perforated plates, for example several perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated boxes, said first perforated plates, perforated rectilinear tubular profiles, perforated rectilinear bars and perforated rectilinear boxes may each independently be as described above.

[0142] Preferably, when the device comprises several first perforated plates, at least some of them are different from each other and they may all be different from each other and / or at least some first chambers delimited by said first perforated plates are different from each other and they may all be different from each other. In particular, when the device comprises several perforated rectilinear tubular profiles, preferably at least some of them are different from each other and they may all be different from each other. More particularly, they may have perforations with a different periodicity, i.e. perforations of different size and / or perforations arranged differently in the upper wall (for example the distance between the centers of two adjacent perforations may be different). Alternatively, or additionally, they may have an upper wall of different thickness and / or a first chamber of different thickness. When the device comprises several perforated bars, preferably at least some of them are different from each other and they may all be different from each other.In particular, they may have perforations with a different periodicity, i.e. perforations of different size and / or perforations arranged differently (for example the distance between the centers of two adjacent perforations may be different), and / or have a different thickness. Alternatively, or additionally, at least some first chambers 2 defined between said perforated bars and the second chambers (the upper walls of the second chambers in the case of profiles or boxes, or the second plates in the case of bars) may be different from each other and they may all be different from each other, in particular the first chambers may have a different thickness. When the device comprises several perforated rectilinear boxes, preferably at least some of them are different from each other and they may all be different from each other.More particularly, they may have perforations with a different periodicity, i.e. perforations of different size and / or perforations arranged differently in the wall (for example the distance between the centers of two adjacent perforations may be different). Alternatively, or additionally, they may have a wall comprising perforations of different thickness and / or a first chamber of different thickness. Thus, preferably, the first perforated plates (in particular the perforated rectilinear tubular profiles and / or the perforated rectilinear bars and / or the perforated rectilinear boxes) and the first chambers which they delimit are such that at least some of the first perforated plates, or all of them, resonate, with the first chambers which they delimit, at different frequencies.

[0143] The device may comprise two or at least two first perforated plates (for example, two or at least two perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes) (as described above), or three or at least three first perforated plates (for example, three or at least three perforated rectilinear tubular profiles and / or perforated rectilinear bars perforated and / or perforated rectilinear boxes), or four or at least four first perforated plates (for example, four or at least four perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes), or five or at least five first perforated plates (for example, five or at least five perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes).Preferably, at least two of the first perforated plates (e.g., at least two of the perforated profiles and / or perforated bars and / or perforated rectilinear boxes) have perforations with a different periodicity (i.e., the periodicity of the perforations of a first plate (e.g., of a profile or a bar or a box) is different from the periodicity of the perforations of another first plate (e.g., of another profile or another bar or another box)), more preferably, at least three of the first perforated plates (e.g., at least three of the perforated profiles and / or perforated bars and / or perforated boxes) have perforations with a different periodicity.

[0144] In a particularly preferred manner, the device according to the invention comprises three first perforated plates, and more particularly three perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes, or at least three first perforated plates, more particularly at least three perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes, and more preferably four (or at least four) first perforated plates, and more particularly four (or at least four) perforated rectilinear tubular profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes. More preferably three or at least three of these first plates (in particular three or at least three of these profiles and / or bars and / or boxes), with the first chambers that they delimit, are configured to resonate at different frequencies.

[0145] Even more preferably, the device comprises at least: - a first perforated plate delimiting a first chamber (in particular a first perforated profile or a first bar or a first box), the system constituted by the first perforated plate and the first chamber being configured to resonate at a first frequency, - a second first perforated plate delimiting a second first chamber (in particular a second perforated profile or a second bar or a second box), the system constituted by the second first perforated plate and the second first chamber being configured to resonate at a second frequency corresponding to a third of an octave below the first frequency, and - a third first perforated plate delimiting a third first chamber (in particular a third perforated profile or a third bar or a third box), the system constituted by the third first perforated plate and the third first chamber being configured to resonate at a third frequency corresponding to a third octave above the first frequency.

[0146] The device may further comprise one or more first plates (for example one or more profiles, preferably tubular and preferably rectilinear, and / or bars, preferably rectilinear, and / or boxes, preferably rectilinear) not perforated and / or one or more first plates (for example one or more profiles, preferably tubular and preferably rectilinear, and / or bars, preferably rectilinear and / or boxes, preferably rectilinear) comprising non-periodic perforations.

[0147] Preferably, the device comprises at least as many first plates (more particularly profiles and / or bars and / or boxes) as the glazed walls of the glazing in which it is intended to be placed comprise sides, for example it comprises four first plates (and more particularly four profiles and / or bars and / or boxes).

[0148] The device may comprise one or more assemblies, each assembly comprising at least one first chamber (delimited by a first plate) and at least one second chamber (delimited by a second plate). Each assembly may be arranged along a different edge of the glazing. For example, for a glazing having four edges, the device may comprise three assemblies arranged along three of the edges, or four assemblies arranged along all four edges.

[0149] The assemblies may be disjointed (all or some of them) or may be joined to each other (all or some of them), preferably at their ends. Preferably, when the device according to the invention is a spacing device, all the assemblies of the spacing device may be joined so as to form a frame. When the assemblies are joined, they may form a single piece (the assemblies coming for example from a single assembly folded in one or more places, for example to form the corners of the frame) or may be assembled together by any suitable means, for example by means of staples, glue, clips and / or by interlocking or welding.In particular, when the assemblies comprise profiles delimiting the first chambers and / or the second chambers, these may be disjointed (all or some of them) or may be joined to each other (all or some of them), preferably at their ends. Preferably, all the profiles located at the ends of the assemblies are joined so as to form a frame. When the profiles are joined, they may form a single piece (the rectilinear profiles coming for example from a . single profile bent in one or more places, for example to form the corners of the frame) or can be assembled together by any suitable means, for example by the means indicated above. Similarly, when the assemblies comprise rectilinear bars delimiting the first chambers and / or the second chambers, these can be disjointed (all or some of them) or can be joined to each other (all or some of them), preferably at their ends. Preferably, all the bars located at the ends of the assemblies are joined so as to form a frame. When the bars are joined, they can form a single piece or can be assembled together by any suitable means, for example by the means indicated above.In embodiments in which the device comprises an assembly comprising one or more profiles and another assembly comprising one or more bars, the upper walls of the profiles and the bars may be joined or disjointed. When the device comprises assemblies comprising rectilinear boxes delimiting the first chambers and / or the second chambers, they are advantageously disjointed.

[0150] When the assemblies each comprising at least one first chamber and at least one second chamber are joined to each other, the assemblies (for example the first and second chambers of one assembly and the first and second chambers of another assembly) may be closed relative to each other (i.e. the chambers of one assembly and the chambers of another assembly are not directly in fluid communication with each other), for example by the presence of a partition between the assemblies, or may be communicating with each other, or some may be closed relative to each other and others communicating with each other.However, when the assemblies of the device comprise rectilinear boxes, the assemblies, i.e. the chambers within said boxes of the assemblies, are closed relative to each other (i.e., they are not directly in fluid communication with each other).

[0151] A seal may also be present, preferably arranged on the external face of the spacing device (i.e. the face of the spacing device closest to the edge of the glass walls), which is preferably the external face of the assembly(s). More preferably, the seal extends from this external face to the edge of the glass walls. This seal may be made with a sealant (called a "sealing sealant") based on polyurethane, polysulfide and / or silicone. However, when the spacing device comprises a perforated strip, preferably no sealant is present on said strip.

[0152] When the device according to the invention is a spacing device, the spacing device makes it possible to fix the distance of the spacing between the glass walls. The distance of this spacing (i.e. the thickness of the cavity between the glass walls) can be from 6 to 30 mm, preferably from 10 to 20 mm, for example 16 mm.

[0153] When the device according to the invention is not a spacing device, for example when it comprises one or more perforated boxes delimiting one or more first chambers and one or more (perforated) boxes delimiting one or more second chambers, said device, and in particular the assembly(s) comprising the boxes, may be placed on a spacing device. More preferably, the external face of the assembly may rest on the spacing device. When the length of the assembly (dimension corresponding to the largest dimension of the assembly) is less than the length of the cavity between the glazed walls (in the same direction), the device may be located in any location in the peripheral zone of the glazing cavity.

[0154] Advantageously, with regard to the first chamber, at least one of the first perforated plates of the device and the first chamber that it delimits are such that the assembly consisting of said first perforated plate and said first chamber resonates at the so-called "mass / spring / mass" frequency of the glazing (for example, at least one of the profiles of the device comprising on its upper wall perforations arranged periodically is such that it resonates at the mass / spring / mass frequency of the glazing and / or at least one of the bars comprising perforations arranged periodically and the first chamber that it delimits are such that they resonate at the mass / spring / mass frequency of the glazing and / or at least one of the boxes comprising perforations arranged periodically is such that it resonates at the mass / spring / mass frequency of the glazing).The presence in the glazing according to the invention of first plates (and more particularly of profiles and / or bars and / or boxes) and first chambers configured to resonate at the mass / spring / mass frequency of the glazing or at a frequency close to this makes it possible to increase the loss of sound transmission at frequencies close to the mass / spring / mass frequency of the glazing but also at frequencies higher than the mass / spring / mass frequency.

[0155] The mass / spring / mass frequency fmsm of the glazing can be determined by the following formula:

[0156] [Math.2]

[0157] In equation 2, p0 is the air density in kg / m3, c0 is the speed of sound in the air cavity in m / s, d is the thickness of the air cavity between the two glass walls in m and msi and ms2 are respectively the masses per unit area of ​​the first and second glass walls in kg / m2.

[0158] Preferably, at least one of the first perforated plates of the device and the first chamber that it delimits (more particularly at least one of the profiles of the device comprising on its upper wall perforations arranged periodically and / or at least one of the bars of the device comprising perforations arranged periodically and the first chamber that it delimits and / or at least one of the boxes of the device comprising perforations arranged periodically) are configured to resonate at a frequency corresponding to a third of an octave lower than the mass / spring / mass frequency of the glazing, or at a frequency close to it. This makes it possible to increase the loss of sound transmission at frequencies close to this frequency.

[0159] Preferably, at least one of the first perforated plates of the device and the first chamber that it delimits (more particularly at least one of the profiles of the device comprising on its upper wall perforations arranged periodically and / or at least one of the bars of the device comprising perforations arranged periodically and the first chamber that it delimits and / or at least one of the boxes of the device comprising perforations arranged periodically) are configured to resonate at a frequency corresponding to a third of an octave higher than the mass / spring / mass frequency of the glazing, or at a frequency close to this frequency. This makes it possible to increase the loss of sound transmission at frequencies close to this frequency.

[0160] The presence, in the glazing, of a device comprising at least two first perforated plates delimiting a first chamber (in particular at least two perforated profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes) of which at least one first plate forms with the first chamber that it delimits a system configured to resonate at the mass / spring / mass frequency of the glazing and at least one other first plate forms with the first chamber that it delimits a system configured to resonate at a third of an octave higher or lower than the mass / spring / mass frequency of the glazing,and preferably at least three first perforated plates delimiting a first chamber (in particular at least three perforated profiles and / or perforated rectilinear bars and / or perforated rectilinear boxes) of which at least one first plate forms with the first chamber that it delimits a system configured to resonate at the mass / spring / mass frequency of the glazing, at least one other first plate forms with the first chamber that it delimits a system configured to resonate at a third of an octave higher than the mass / spring / mass frequency of the glazing and at least one other first plate forms with the first chamber that it delimits a system configured to resonate at a third, octave lower than the mass / spring / mass frequency of the glazing, makes it possible to smooth out the sound transmission loss around the mass / spring / mass frequency of the glazing and to improve the acoustic insulation of the glazing over a wider frequency band around the mass / spring / mass frequency of the glazing.

[0161] The invention also relates to a glazing comprising a multi-chamber device as described above.

[0162] The glazing according to the invention comprises at least two glazed walls. Advantageously, the glazed walls are parallel or essentially parallel to each other.

[0163] In embodiments, the glazing according to the invention may comprise exactly two glazed walls (it is then called “double glazing”), or exactly three glazed walls (it is then called “triple glazing”), or at least three glazed walls, for example four glazed walls (it is then called “quadruple glazing”).

[0164] For the purposes of the present invention, a “glazed wall” designates any structure comprising (or consisting of) at least one glass sheet or a glazed assembly. By “glazed assembly” is meant a multi-layer glazed element of which at least one layer is a glass sheet. Thus, the glazed walls may for example independently comprise a single glass sheet or a glazed assembly, for example consisting of laminated glazing (as described in more detail below).

[0165] The glass sheet can be made of organic or mineral glass. It can be made of tempered glass.

[0166] The glazed walls (or one of the glazed walls) may comprise (or consist of) a glazed assembly comprising at least one glass sheet which may be as described above. The glazed assembly is preferably a laminated glazing. By "laminated glazing" is meant at least two glass sheets between which is inserted at least one interlayer film generally made of viscoelastic plastic material. The interlayer film made of viscoelastic plastic material may comprise one or more layers of a viscoelastic polymer such as poly(vinyl butyral) (PVB) or an ethylene-vinyl acetate copolymer (EVA), or ethylene copolymer (corresponding to the definition of an ionomer), more preferably PVB. The interlayer film may be made of standard PVB or acoustic PVB (such as single-layer or three-layer acoustic PVB).Acoustic PVB is generally made up of three layers: two outer layers of standard PVB and an inner layer of PVB with added plasticizer to make it less rigid than the outer layers. The use of glass walls including laminated glazing improves the sound insulation of the glazing, the sound insulation being further increased when the interlayer film is made of acoustic PVB.

[0167] Each glass wall has two main faces opposite each other corresponding to the faces of the glass wall having the largest surface areas. Advantageously, the glazed walls independently have a thickness (between their two main faces) greater than or equal to 1.6 mm, for example a thickness of 1.6 to 24 mm, preferably 2 to 12 mm, more preferably 4 to 10 mm, for example 4 or 6 mm. The glazed walls of the glazing according to the invention may all have the same thickness or have different thicknesses. The greater the thickness and / or the higher the density of the glazed walls, the greater the acoustic insulation will be. In addition, the thicker the glazed walls, the lower the mass / spring / mass frequency of the glazing will be.

[0168] Preferably, all the glazed walls of the glazing have an identical height and width. The glazing according to the invention may have any possible shape, and preferably has a quadrilateral shape, in particular a rectangular or essentially rectangular shape. Alternatively, the glazing may have a circular, or essentially circular, shape, or an elliptical, or essentially elliptical shape, or a trapezoidal or essentially trapezoidal shape.

[0169] The glazed walls define a cavity between them. Each of the glazed walls defining the cavity comprises an inner face corresponding to the main face of the glazed wall facing the cavity in question and an outer face corresponding to the second main face of the glazed wall, i.e. corresponding to the main face of the glazed wall opposite the face facing the cavity.

[0170] Advantageously, the device according to the invention is positioned in the cavity of the glazing, more particularly in a peripheral zone of the cavity of the glazing. By "peripheral zone of the cavity" is meant a zone of the cavity adjacent to the edges of the glazed walls and preferably of width (i.e. in a direction orthogonal to the edge of the glazed walls, in the plane of the glazed walls) less than or equal to 20 cm, more preferably less than or equal to 10 cm, more preferably less than or equal to 5 cm.

[0171] Preferably, when the device is a spacing device (in particular, when it comprises one or more perforated profiles and / or perforated bars), the first perforated plate(s) and / or the second plate(s) of the spacing device are each parallel to an edge of the glazed walls (for example, the rectilinear (perforated) profile(s) and / or the rectilinear (perforated) bars are each parallel to an edge of the glazed walls). When the device comprises one or more (perforated) boxes, the (perforated) box(es) are preferably each parallel to an edge of the glazed walls.

[0172] In a particularly preferred manner, the device is placed in the cavity of the glazing so that the first chamber delimited by the first perforated plate is in fluid communication with the cavity of the glazing formed between the glazed walls via the perforations of the first plate. Thus, preferably, when the devicecomprises at least one perforated profile delimiting a first chamber, the perforated profile is placed in the glazing cavity so that the upper wall of the profile(s) faces the inside of the glazing cavity, the lower wall of the profile(s) facing outwards and the edges of the glazing, in contact with the second chamber. Thus, when the second chamber is arranged between the first chamber and the edge of the glazing, the first chamber of the perforated profile(s) is in fluid communication with the glazing cavity via the perforations 6 present in the upper wall of said profiles (i.e. a fluid, and preferably a gas, can circulate from the glazing cavity to the inside of the first chamber 2 of the profiles 1, and vice versa).When the first chamber is arranged between the second chamber and the edge of the glazing, the first chamber of the perforated profile(s) is in fluid communication with the part of the cavity of the glazing, via the perforations present in the upper wall of said profiles as well as the perforations of the second plate of the second chamber and the perforations of the wall facing the second plate (in the case of a profile or a box delimiting the second chamber).

[0173] When the device comprises at least one perforated box, it is placed in the glazing cavity so that the wall comprising the periodic perforations either faces the center of the glazing cavity, or faces a glazed wall without being in contact with it.

[0174] When the device is a spacer device, the two glass walls are fixed to the spacer device.

[0175] More preferably, when the spacing device comprises at least one perforated profile, the two glazed walls are fixed to the side walls of the profile(s) of the spacing device, even more preferably their inner face is each fixed to a side wall of the profile(s) of the spacing device.

[0176] When the spacing device comprises at least one perforated bar, the two glazed walls are preferably fixed to lateral faces opposite each other of the bar.

[0177] Advantageously, the glass walls are attached to the spacer device by gluing, for example by an adhesive, such as a polyisobutylene (PIB) based adhesive, by a silicone sealant or by a double-sided adhesive tape.

[0178] Preferably, the cavity of the glazing (between the glazed walls) comprises a gas. The gas may be air and / or carbon dioxide, and / or argon, and / or krypton and / or xenon. The use of argon, krypton or xenon, in addition to or instead of air, makes it possible to improve the thermal insulation of the glazing.

[0179] The glazing according to the invention may be totally opaque, totally transparent, or partly opaque and partly transparent. Preferably, the glazing is at least partly transparent.

[0180] One (or more) of the glazed walls may be tinted in the thickness over all or part of its surface. One (or more) of the glazed walls may be wholly or partly covered with an opaque coating, for example, a paint and / or an enamel. The opaque coating may be present on the inner face of the glazed wall, or on its outer face, or on both faces, preferably it covers the inner face of the glazed wall. In embodiments, only one of the glazed walls of the glazing is covered with an opaque coating. This glazed wall is advantageously the glazed wall intended to be the outermost glazed wall of the glazing when the latter is used in a facade or exterior window of a building.

[0181] In embodiments, the glazed walls of the glazing, or at least one of the glazed walls, may have undergone a treatment to improve the thermal insulation of the glazing. In particular, the glazed wall(s) may comprise one (or more) insulating layer(s) such as an insulating layer based on metal and / or metal oxide, on one or more of their main faces, preferably on the inner face. When the glazed wall is also covered with an opaque coating (such as an enamel and / or a paint), an insulating layer compatible with the opaque coating is preferably used. Alternatively, the insulating layer and the opaque coating may be arranged on different faces of the glazed wall (for example, the insulating layer may be on the inner face and the opaque coating on the outer face).Alternatively, when at least one of the glass walls is a glass assembly, the insulating layer may be interposed in the glass assembly, for example between a layer of PVB and a sheet of glass.

[0182] In advantageous embodiments, the glazing according to the invention may have higher acoustic insulation (determined for example by a measurement of the acoustic reduction index, in particular according to the ISO 10140 standard) than an identical glazing but not comprising perforations arranged periodically in the first plates of the device, over a frequency range from 200 to 2000 Hz, preferably from 100 Hz to 5000 Hz, more preferably from 50 Hz to 20,000 Hz.

[0183] The glazing according to the invention can be used in any application using glazing. In particular, the glazing according to the invention can be building glazing. The glazing can be intended to provide the interface between the exterior and the interior of the building, and can for example be facade glazing, window glazing or door glazing. Alternatively, the glazing can be intended to be placed inside the building.

[0184] The invention also relates to a method of manufacturing glazing as described above comprising: - the supply of at least two glass walls; - the supply of a device as described above; - the arrangement of the two glass walls so as to form a cavity between them; and - the introduction of the device into the cavity.

[0185] For example, when the device comprises a profile or box delimiting a first chamber and a profile or box delimiting a second chamber, the step of providing a device as described above may comprise a step of manufacturing the profile (or box) for each chamber by extrusion; a step of filling a desiccant into the second chamber and / or an absorbent material into the first chamber; a step of bonding the two chambers (for example, the first chamber being arranged above the second chamber); and a step of forming perforations in the first plate (upper wall) and possibly the lower wall of the profile (or box) delimiting the first chamber as well as the upper wall of the profile (or box) delimiting the second chamber.

[0186] Where the device comprises a single part comprising the first chamber and the second chamber (e.g., the first chamber being disposed above the second chamber), the step of providing a device as described above may comprise a step of manufacturing the part by extrusion; a step of filling a desiccant into the second chamber and / or an absorbent material into the first chamber; and a step of forming the perforations as described above. Manufacturing such a single part may simplify the method of manufacturing the device.

[0187] Preferably, when the device is a spacing device, the manufacturing method comprises a step of fixing the two glazed walls to the spacing device. More preferably, when the spacing device comprises at least one profile (delimiting a first chamber and / or a second chamber), the two glazed walls are fixed to the spacing device so that the first plate of the spacing device comprising the perforations arranged periodically faces the cavity formed between the glazed walls of the glazing.

[0188] The multi-chamber device described above makes it possible to obtain glazing having improved acoustic insulation, in particular in the low and medium frequencies, but also in the high frequencies, while allowing the absorption of humidity between glazed walls of said glazing. The improved acoustic insulation by means of perforated plates as described above is illustrated in the experimental part of WO 2022 / 234237.

Claims

Claims

1. Glazing (10; 30; 40) comprising at least two glazed walls (7; 27; 37) forming a cavity between them, in which the cavity comprises a multi-chamber device comprising at least a first plate (3; 23), said first plate (3; 23) comprising a plurality of perforations (6) arranged periodically and delimiting a first chamber (2) arranged in the cavity, said perforations placing said first chamber (2) and a portion of the cavity external to the multi-chamber device in fluid communication, the multi-chamber device further comprising at least a second chamber (2') containing a desiccant, the second chamber being arranged outside the first chamber.

2. Glazing (10; 30; 40) according to claim 1, wherein said second chamber (2') is delimited by at least one second plate (3'; 23').

3. Glazing (10; 30; 40) according to claim 2, wherein the second plate (3'; 23') comprises a plurality of perforations (6').

4. Glazing (10; 30; 40) according to any one of claims 1 to 3, wherein a porous absorbent material (50) is present inside said first chamber (2), preferably selected from the group consisting of mineral wools, textile fibers, polymer foams and combinations thereof.

5. Glazing (10; 30; 40) according to any one of claims 1 to 4, in which the device comprises: - a profile (1) or box (21) formed from a plurality of walls, the first plate (3; 23) being one of the walls of the profile (1) or box (21), and the first chamber (3; 23) being an internal space of the profile (1) or box (21) delimited by the walls.

6. Glazing (10; 30; 40) according to any one of claims 1 to 4 taken in combination with claim 2, in which the device comprises: - a rectilinear bar forming the first plate, the first chamber (2) being delimited by the first plate (3; 23) and the second plate (3'; 23') or by the first plate (3; 23) and an edge of the glazing.

7. Glazing (10; 30; 40) according to any one of claims 1 to 6 taken in combination with claim 2, wherein the device comprises: - a profile (1') or box (21') formed of a plurality of walls, the second plate (3'; 23') being one of the walls of the profile or box, and the second chamber (2') being an internal space of the profile (1') or box (21') delimited by the walls, or - a rectilinear bar forming the second plate (3'; 23'), and the second chamber (2') being delimited by the second plate and an edge of the glazing or by the first plate and the second plate.

8. Glazing (10; 30; 40) according to any one of claims 1 to 7, in which the second chamber (2') is arranged between the first chamber (2) and an edge of the glazing.

9. Glazing (10; 30; 40) according to any one of claims 1 to 7, wherein the first chamber (2) and the second chamber (2') are arranged next to each other along the edge of the glazing, the device preferably comprising at least one box formed of a plurality of walls.

10. Glazing (10; 30; 40) according to any one of claims 1 to 9, in which the desiccant comprises granules.

11. Glazing (10; 30; 40) according to any one of claims 1 to 10, in which the first plate (3; 23) comprises at least three perforations (6), preferably at least four perforations (6).

12. Glazing (10; 30; 40) according to any one of claims 1 to 11, wherein the device comprises at least two first plates (3; 23), preferably at least three first plates (3; 23), each comprising a plurality of perforations (6; 26) arranged periodically and delimiting a first chamber (2) arranged in the cavity, and preferably the periodicities of the perforations (6; 26) of at least two of the first plates (3; 23), more preferably of at least three first plates (3; 23), are different from each other.

13. Glazing (10; 30; 40) according to any one of claims 1 to 12, wherein the first chamber that said first plate delimits is configured to resonate at low frequency and preferably at the mass / spring / mass frequency of the glazing (10; 30; 40).

14. Glazing (10; 30; 40) according to any one of claims 1 to 13, wherein the device is positioned in a peripheral zone of the cavity of the glazing (10, 30).

15. Glazing (10; 30; 40) according to any one of claims 1 to 14, being building glazing, such as building facade, window or door glazing or interior glazing.

16. A spacer device comprising a multi-chamber device comprising at least one first plate (3; 23), said first plate (3; 23) comprising a plurality of perforations (6) arranged periodically and delimiting a first chamber (2), the multi-chamber device further comprising at least one second chamber (2') containing a desiccant, the second chamber being arranged outside the first chamber, said spacer device being suitable for the manufacture of a glazing unit according to any one of claims 1 to 15.