Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
  • E06B3/67—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light
  • E06B3/6707—Units comprising two or more parallel glass or like panes permanently secured together characterised by additional arrangements or devices for heat or sound insulation or for controlled passage of light specially adapted for increased acoustical insulation
• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
  • E06B3/66—Units comprising two or more parallel glass or like panes permanently secured together
  • E06B3/6612—Evacuated glazing units

Definitions

• the present invention relates to glazing with improved acoustic insulation performance.
• Insulating glass is commonly used in the building to improve the thermal insulation of premises.
• the glazings in question comprise two sheets of glass generally of different thickness, associated by means of an intermediate frame which keeps them at a certain distance from each other by trapping between them a blade of a gas, such as the air.
• Various means have so far been proposed for improving the acoustic performance of insulating glazing, as has been reported in international PCT application WO 00/75473.
• These means may in particular consist of a waveguide which is arranged at the periphery of the glazing and which communicates with the air gap by several orifices whose shape, section and position are determined so as to detune the acoustic waves and mechanical which arise respectively in the air space and on the glass sheets when the glazing is subjected to an incident sound field.
• an acoustic insulating double glazing comprising internally, in order to improve the acoustic performance, an additional profile attached to the peripheral intermediate frame via 'an elastic bond.
• the Applicant Company sought to further improve the acoustic performance of such glazing and it has developed a new type of profile configuration attached to an intermediate frame or associated with it, this profile forming against the walls of transparent substrate micro-cavities in which the acoustic waves are caused to "exhaust" by friction against their facing walls, causing losses thermo-viscous, that is to say transforming waves into heat energy and, by. there, decreasing the acoustic energy.
• the glazings according to the present invention can thus be qualified as glazings "with a thermo-viscous loss effect" and, as the results indicated below show, allow significant improvements in acoustic performance.
• the present invention therefore firstly relates to an acoustic insulating glazing comprising at least two sheets of substrate, assembled at their periphery using a device forming a tight seal and intermediate frame, which defines with the two sheets of substrate a flat cavity filled with a gas, characterized in that, on at least part of the periphery of said cavity, is formed at least one micro-cavity constituting an area of thermo-viscous losses from said cavity along '' at least one of the internal walls of the two sheets of substrate delimiting said cavity, the dimensions of a micro-cavity being chosen to favor the propagation of part of the acoustic waves from the cavity towards the micro-cavity, generating thermo-viscous losses and thus reducing the acoustic energy of said cavity, means being provided for containing the acoustic waves escaping from said micro-cavity.
• part of the acoustic waves of a glazing cavity is absorbed mainly in the medium and high frequencies.
• a micro-cavity is advantageously in the form of a thin blade whose width is between 0.2 mm and 1 mm limits included and the useful height is at least equal to 6 mm, preferably at least equal to 11 mm .
• the thickness of a micro-cavity is greater than a millimeter, the expected effect of reducing the acoustic energy of the cavity will not be obtained. It is moreover important that the useful height of the microcavity is sufficient so that the friction surface of the acoustic wave is made large, leading to the thermo-viscous losses which are estimated to be the cause of the reduction in acoustic energy. It should however be emphasized that the increase in the useful height of the micro-cavity will be limited by the need to keep an acceptable view in the case of transparent glazing.
• At least one micro-cavity is formed on at least one face and at least one of the sides of the glazing; in particular, provision may be made for at least one micro-cavity to be formed on each of the faces of the glazing, in particular over the entire periphery of the latter.
• a micro-cavity is formed between the internal wall of a substrate sheet and a wall opposite a profile disposed at the internal periphery of the cavity and delimiting an internal chamber in communication with the microcavity by at least one opening in said wall of the profile, said chamber for containing the acoustic wave's escaping from the micro-cavity.
• an opening is formed by a continuous or discontinuous longitudinal slot over the entire length of a profile. We prefer a discontinuous slot to maintain the rigidity of the profile.
• the slot (s) will be arranged in the lower part of the profile opposite the cavity, namely, as close as possible to the bottom of the micro-cavities in order to maximize the useful height of the micro-cavity and therefore the surfaces friction.
• useful height of a micro-cavity means "the distance between the upper plane of the slot and that where the micro-cavity opens into the cavity.
• a slot could for example have a height of the order of 1 mm.
• the slots have the role of ensuring a natural circulation of the gas (air) to force it to enter the microcavity. This circulation is improved if a configuration is provided with microcavities on each face of the glazing, which represents a preferred embodiment.
• the profile is advantageously constituted by an element having a section at least in a U whose bottom in contact with the cavity filled with gas and the wings delimit the interior chamber and the wings each delimit a micro-cavity with the wall facing the substrate and cooperate at their base with the device forming a seal and an intermediate frame.
• the device forming a waterproof seal and intermediate frame is constituted by a frame having a bottom in contact with a peripheral sealing joint adhering to the internal edges of the two facing sheets of substrate, and wings arranged facing the sheets of substrate with interposition of a bonding and sealing bead, continuous or discontinuous, the U-shaped profile for forming micro-cavities being attached to said intermediate frame or being formed in one piece with it, in which case the wings of the intermediate frame extend to form those of said U-shaped profile.
• the device forming a tight seal and intermediate frame is constituted by a peripheral strip adhering to the edges of the two sheets of substrate, the U-shaped profile for forming micro-cavities being attached to said strip.
• the substrate sheets which form the double glazing or multiple glazing according to the present invention may consist of monolithic glass, laminated glass, or so-called “acoustic” laminated glass, that is to say that is to say incorporating, as an interlayer sheet situated between the glass sheets, at least one film of particular plastic materials having acoustic properties.
• acoustic acoustic performance due to these films with acoustic properties will be added to those due to the configuration known as “with thermo-viscous loss effect” of the present invention.
• Figure 1 is a schematic view in partial cross section in an edge region of a double glazing according to a first variant of the invention
• Figures 2 and 3 are views similar to Figure 1 of n double glazing according to a second and a third variant of the invention, respectively
• FIG. 4 represents the curves of the sound reduction index as a function of the frequency for different heights of microcavities and with respect to a reference glazing without microcavity.
• acoustic insulating double glazing which includes two glass sheets 2, 3, of different thickness, which are kept separate by means of a peripheral device 4 forming a tight seal and intermediate frame, the sheets 2, 3 and the device 4 delimiting a flat cavity 5, tight, containing a gas such as air.
• the device 4 consists of an intermediate frame 6 consisting of a profile which has two side walls ⁇ a, ⁇ b, each in contact with the facing glass sheet with the interposition of a longitudinal bead of bonding and sealing respectively 7a, 7b.
• the bonding and sealing beads 7a, 7b are continuous.
• the frame 6 can be metallic (for example aluminum) or composite material, and the bonding and sealing cords, for example butyl rubber.
• the two side walls 6a, 6b are closed on the internal side by a front transverse wall 6c and on the external side by a transverse bottom wall 6d adhering to a plane peripheral sealing joint 8 made of polysulphide which is glued to the internal edges of the two sheets of glass 2 and 3 opposite.
• the sealing joint provides, in addition to the gluing and mechanical holding function of the glazing, the functions of sealing against gases, dust and liquid water. Note that the water vapor tightness is ensured by the butyl cords 7a. 7b and by the presence of aluminum opposite 6d.
• the two walls 6a, 6b of the profile 6 each have, parallel to the respective bonding and sealing bead 7a, 7b, a longitudinal slot 9a, 9b respectively, which can be continuous or discontinuous.
• micro-cavity 5a and 5b having the shape of thin blades - opening into the cavity 5, the gas contained therein circulating through these micro-cavities 5a, 5b and through the slots 9a, 9b in the inner chamber 6e of the intermediate frame 6, which also constitutes the section known as “with thermo loss effect”. viscous "which is a feature of the present invention.
• Thickness of the cavity 5 20 mm - Thickness of a bead 7a, 7b / width of a micro-cavity 5a, 5b: 0.2 mm
• FIG. 1 There is symbolically shown in Figure 1, by arrow F, the path of a sound wave in the microcavity 5a.
• the configuration of the present invention is such that the wave is encouraged to move in this micro-cavity by undergoing friction against the walls delimiting this micro-cavity, its acoustic energy decreasing thanks to these thermo-viscous losses.
• FIG. 1 requires modifying the height of a typical intermediate frame, such as that which was used for the reference double glazing.
• reference numbers 10 times greater than those used to designate similar elements in Figure 1 were used.
• This variant differs from that of Figure 1 in that used a typical intermediate frame closed by a transverse wall 16f disposed in the plane of the upper edge of the cords 17a, 17b and that, on this frame, a section 16 has been added comprising a bottom 16c and two wings 16a, 16b comprising the slots respectively 19a, 19b.
• Profile 16 can be attached to the typical intermediate frame by any means such as gluing, welding or coextrusion.
• FIG. 3 To illustrate the alternative embodiment of Figure 3, reference numbers 20 times higher than those used to designate similar elements in Figure 1 were used.
• This variant differs from that of Figure 1 in that the device 24 is limited to a peripheral strip 28 adhering to the edges of the two glass sheets 22 and 23, and that the U-shaped section 26, which comprises the bottom 26c and the wings 26a and 26b with the slots respectively 29a and 29b, is directly attached to the strip 28.
• the strip 28 is for example made of aluminum and thus ensures total tightness.
• the invention has been described for insulating glazing comprising at least two sheets of transparent glass substrate. It also applies to insulating glazing whose substrates are not necessarily transparent and / or glass, such as metal, polycarbonate, methacrylate substrates.

Landscapes

• Engineering & Computer Science (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• Acoustics & Sound (AREA)
• Securing Of Glass Panes Or The Like (AREA)
• Joining Of Glass To Other Materials (AREA)
• Building Environments (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=29763883

Family Applications (1)

Country Status (9)

Families Citing this family (3)

Family Cites Families (5)

• 2002
  • 2002-07-15 FR FR0208937A patent/FR2842242B1/fr not_active Expired - Fee Related
• 2003
  • 2003-07-09 EP EP03753633A patent/EP1521895A1/de not_active Withdrawn
  • 2003-07-09 CN CNB038167905A patent/CN100439647C/zh not_active Expired - Fee Related
  • 2003-07-09 KR KR1020057000657A patent/KR20050025599A/ko not_active Application Discontinuation
  • 2003-07-09 BR BR0312018-0A patent/BR0312018A/pt not_active Application Discontinuation
  • 2003-07-09 AU AU2003271798A patent/AU2003271798A1/en not_active Abandoned
  • 2003-07-09 US US10/520,514 patent/US7537813B2/en not_active Expired - Fee Related
  • 2003-07-09 JP JP2004520744A patent/JP2005533204A/ja active Pending
  • 2003-07-09 WO PCT/FR2003/002138 patent/WO2004007886A1/fr active Application Filing

Non-Patent Citations (1)

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