INSULATING GLAZING UNIT, IN PARTICULAR A TRIPLE INSULATING GLAZING UNIT, AND METHOD FOR PRODUCING AN INSULATING GLAZING UNIT

Abstract

An insulating glazing unit, in particular a triple insulating glazing unit, includes at least one spacer shaped to form a peripheral spacer frame and defining an inner region, a first outer pane, which is arranged on a first pane contact surface of the spacer frame and a second outer pane, which is arranged on a second pane contact surface of the spacer frame, at least one central pane, which is introduced into at least one intermediate space of at least one retaining profile and which retaining profile is shaped to form a peripheral retaining profile frame, which frames the central pane, wherein the central pane is arranged with the retaining profile frame within the inner region of the spacer frame and between the outer panes.

Claims

1. Insulating glazing unit, comprising: at least one spacer, shaped to form a peripheral spacer frame and defining an inner region, wherein the spacer consists of a first pane contact surface and an oppositely arranged second pane contact surface that are joined by an inner surface and an outer surface to form at least one hollow chamber, a first outer pane, which is arranged on the first pane contact surface of the spacer frame and a second outer pane, which is arranged on the second pane contact surface of the spacer frame, at least one central pane, which is introduced into at least one intermediate space of at least one retaining profile and the retaining profile is shaped to form a peripheral retaining profile frame, which frames the central pane, wherein the central pane with the retaining profile frame is arranged within the inner region of the spacer frame and between the outer panes and the retaining profile has at least one through opening that connects the side of the retaining profile facing the central pane to the side facing away from the central pane.

2. Insulating glazing unit according to claim 1, wherein the retaining profile includes or consists of a main body, and two retaining strips that form the intermediate space are arranged on the side of the main body facing the central pane.

3. Insulating glazing unit according to claim 1, wherein the retaining profile includes or consists of a main body, and a groove that forms the intermediate space is molded into the main body on the side facing the central pane.

4. Insulating glazing unit according to claim 2, wherein the main body has, on the side facing away from the central pane, at least two spacing strips.

5. Insulating glazing unit according to claim 4, wherein the spacing strips are discontinuous and are arranged only in sections along the main body of the retaining profile.

6. Insulating glazing unit according to claim 1, wherein the retaining profile has at least two through openings.

7. Insulating glazing unit according to claim 1, wherein the retaining profile contains or is made of a plastic.

8. Insulating glazing unit according to claim 1, wherein the retaining profile contains or is made of natural or synthetic rubber, or a metal.

9. Insulating glazing unit according to claim 1, wherein the inner region between the outer panes is filled with a protective gas.

10. Insulating glazing unit according to claim 1, wherein an outer region between an outer surface of the spacer frame and the outer edges of the outer panes contains, peripherally, a seal, and the pane assembly comprising the outer panes and the spacer frame is hermetically sealed.

11. Insulating glazing unit according to claim 10, wherein the retaining profile frame is implemented such that a gas exchange can occur between an inner subregion between the first outer pane and the central pane and the inner subregion between the central pane and the second outer pane.

12. Method for producing an insulating glazing unit according to claim 1, the method comprising: a) introducing at least one central pane into at least one intermediate space of at least one retaining profile and the retaining profile is shaped to form a peripheral retaining profile frame, which frames the central pane, and joining a first outer pane to a first pane contact surface of a spacer, wherein the spacer is shaped to form a peripheral spacer frame in the edge region of the first outer pane and an inner region is framed, b) arranging the central pane with the retaining profile frame in the inner region of the spacer frame, c) joining a second outer pane to a second pane contact surface of the spacer, and d) pressing together and fixedly bonding the pane assembly comprising the first outer pane, the second outer pane, and the spacer frame.

13. Method for producing an insulating glazing unit according to claim 12, wherein after the step c) and before the step d), the inner region between the outer panes is filled with a protective gas.

14. Method for producing an insulating glazing unit according to claim 12, wherein after the pane assembly comprising the first outer pane, the second outer pane, and the spacer frame is closed and pressed together, a seal is filled peripherally in the outer region between the outer surface of the spacer frame and the outer edges of the outer panes.

15. A method comprising utilizing an insulating glazing unit produced according to claim 1 in construction and architecture indoors and outdoors.

16. Insulating glazing unit according to claim 1, wherein the insulating glazing unit is a triple insulating glazing unit.

17. Insulating glazing unit according to claim 2, wherein the main body is a rectangular main body.

18. Insulating glazing unit according to claim 3, wherein the main body is a rectangular main body.

19. Insulating glazing unit according to claim 4, wherein the main body has, on the side facing away from the central pane, at least four spacing strips.

20. Insulating glazing unit according to claim 6, wherein at least one of the at least two through openings is arranged on one side relative to the intermediate space and at least another one of the at least two through openings is arranged on the opposite side relative to the intermediate space.

21. Insulating glazing unit according to claim 7, wherein the plastic is softer than the material of the spacer and is selected from the group consisting of polyethylene (PE), polycarbonates (PC), polystyrene, polyesters, polyurethanes, polymethyl methacrylates, polyacrylates, polyamides, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), preferably acrylonitrile butadiene styrene, (ABS) acrylonitrile styrene acrylester (ASA), acrylonitrile butadiene styrene-polycarbonate (ABS/PC), styrene acrylonitrile (SAN), PET/PC, polypropylene (PP), PBT/PC, and copolymers and mixtures thereof.

22. Insulating glazing unit according to claim 7, wherein the plastic is foamed.

23. Insulating glazing unit according to claim 8, wherein the rubber is butadiene rubber (BR), styrene butadiene rubber, acrylonitrile butadiene rubber (NBR), butyl rubber (IIR), ethylene propylene diene rubber (EPDM), chloroprene rubber (CR), and/or polyisoprene rubber (IR), and the metal is aluminum or stainless steel.

24. Insulating glazing unit according to claim 9, wherein the protective gas is an inert gas that is argon, krypton, or mixtures thereof.

25. Insulating glazing unit according to claim 10, wherein the seal is made of an organic polysulfide.

Description

[0067] In the following, the invention is explained in detail with reference to drawings and examples. The drawings are purely schematic representations and not true to scale. They in no way restrict the invention. They depict:

[0068] FIG. 1A a plan view of a central pane framed by a retaining profile frame;

[0069] FIG. 1B a perspective view of a cross-section through the central pane framed by a retaining profile frame of FIG. 1A;

[0070] FIG. 2 a detail of the central pane with a retaining profile;

[0071] FIG. 3 a cross-sectional view of the insulating glazing unit according to the invention;

[0072] FIG. 4 a schematic view of an insulating glazing unit according to the invention during the method according to the invention;

[0073] FIG. 5 a flowchart of a possible embodiment of the method according to the invention; and

[0074] FIG. 6 a perspective view of a cross-section through an alternative embodiment of a module according to the invention.

[0075] FIG. 1A depicts a plan view of a central pane 2 framed by a retaining profile frame 1 according to the invention. FIG. 1B depicts a perspective view of a cross-section through the central pane 2 framed by the retaining profile frame 1 according to the invention of FIG. 1A.

[0076] The retaining profile frame 1 consists of four sections of the retaining profile 1, which are in each case arranged on the sides of the rectangular central pane 2. The four sections of the retaining profile 1 are joined in the corners of the central pane 2 at a 90 angle in each case. The main body 1.1 of the retaining profile 1 has two retaining strips 6, wherein in the view of FIG. 1A, only the retaining strip 6 positioned at the top in the plane of the figure is visible, since in the projection through the central pane 2, the retaining strips 6 are arranged congruently one above another. The two retaining strips 6 form an intermediate space 7. The edge region of the central pane 2 is in each case set into the recess 7 and is secured in the retaining profile frame 1 by the retaining strips 6.

[0077] The result is a module 10 comprising the central pane 2, which is anchored in the intermediate space 7 formed by the retaining strips 6 of the retaining profile 1 and is completely framed by the retaining profile 1 to form a retaining profile frame 1.

[0078] The retaining profile 1 consists in this example of a solid main body 1.1 without hollow spaces in the interior. The retaining profile 1 comprising the main body 1.1, the retaining strips 6, and the spacing strips 8 is, for example, one piece and made of a single material. The retaining profile 1 is made, for example, from a solid material; in other words, the retaining profile 1 is formed without hollow spaces. The retaining profile 1 is made, for example, of foamed styrene acrylonitrile (SAN). The plastic of the retaining profile 1 is selected soft such that it enables largely tension-free mounting of the central pane 2, but at the same time, still securely fixes the central pane 2. The width b.sub.H of the main body 1.1 of the retaining profile 1 is, for example, 20 mm. The thickness, i.e. the height h.sub.H of the main body 1.1 of the retaining profile 1 is, for example, 1.5 mm. The height h.sub.h of a retaining strip 6 is, for example, 3 mm; the width b.sub.h is, for example, 1 mm.

[0079] FIG. 2 depicts a detail of a cross-section of a central pane 2 that is secured in a retaining profile 1. The retaining profile has a rectangular main body 1.1. The main body 1.1 has two retaining strips 6 on the side facing the central pane 2, which form an intermediate space 7. The central pane 2 is arranged in the edge region in the intermediate space 7. The main body 1.1 has four spacing strips 8, on the side facing away from the central pane 2, for example. The spacing strips 8 facilitate the sliding of the module 10 comprising the central pane 2 and the retaining profile frame 1 into the subsequent insulating glazing unit 100. Moreover, the spacing strips 8 facilitate the filling of the interior in the insulating glazing unit 100 with a protective gas. The spacing strips 8 can be continuous and can extend over the entire length of the respective retaining profile 1. Alternatively, the spacing strips 8 can be discontinuous and run only in sections along the retaining profile 1. Moreover, openings can be arranged in the main body (see, in this regard, FIG. 6).

[0080] FIG. 3 schematically depicts an insulating glazing unit 100 according to the invention, using the example of a triple insulating glazing unit. The insulating glazing unit 100 comprises a spacer 4 that is shaped to form a peripheral spacer frame 4 and defines an inner region 9 completely along the frame. A module 10 comprising a central pane 2 that is secured in a retaining profile frame 1 is arranged in the inner region 9. The module 10 corresponds, for example, to the module 10 that is described in FIGS. 1A, 1B, and 2. The module 10 subdivides the inner region 9 into a first inner subregion 9.1 and a second inner subregion 9.2. The first inner subregion 9.1 is delimited by the first outer pane 3a, a section of the spacer frame 4, and the central pane 2. The second inner subregion 9.2 is, correspondingly delimited by the second outer pane 3b, a section of the spacer frame 4, and the central pane 2. The spacer 4 is a customary prior art spacer for two outer panes in a double insulating glazing unit, as is known, for example, from WO 2016/046081 A1.

[0081] The first outer pane 3a of the insulating glazing unit 100 is connected via an adhesive connection 5 to the first pane contact surface 4.1 of the spacer 4, while the second outer pane 3b is connected via an adhesive connection 5 to the second pane contact surface 4.2. The adhesive connection 5 additionally has a sealing effect and is made, for example, of polyisobutylene or butyl rubber.

[0082] The spacer 4 consists, for example, of a polymeric spacer main body 41 that has at least one hollow chamber 42. The hollow chamber 42 is filled with a desiccant. The desiccant contains, for example, molecular sieves such as natural and/or synthetic zeolites. The spacer main body 41 has, on the surface facing the inner region 9, a plurality of openings (not shown here), enabling a gas exchange between the hollow chamber 42 with the desiccant and the inner region 9. As a result, the desiccant can withdraw moisture from the inner region 9 of the insulating glazing unit 100, preventing an undesirable fogging and increasing, and thus improving, the thermal insulation of the insulating glazing unit 100.

[0083] An insulating film 43 is applied on the outer surface 44 of the spacer 4, i.e., on the side of the spacer main body 41 facing away from the central pane 2, which film reduces the heat transfer through the polymeric spacer main body 41 into the inner region 9 of the insulating glazing unit 100. The insulating film 43 can, for example, be secured on the polymeric spacer main body 41 with a polyurethane hot melt adhesive. The insulating film 43 contains, for example, three polymeric layers made of polyethylene terephthalate with a thickness of 12 m and three metallic layers made of aluminum with a thickness of 50 nm. The metallic layers and the polymeric layers are in each case applied alternatingly, with the two outer layers formed by polymeric layers. In other words, the layer sequence consists of a polymeric layer, followed by a metallic layer, followed by an adhesive layer, followed by a polymeric layer, followed by a metallic layer, followed by an adhesive layer, followed by a metallic layer, followed by a polymeric layer.

[0084] The spacer main body 41 is made, for example, of glass-fiber-reinforced styrene acrylonitrile (SAN). The coefficient of thermal expansion of the spacer main body 41 can be varied and adapted through the selection of the glass fiber content in the spacer main body 41. By adapting the coefficient of thermal expansion of the spacer main body 41 and of the insulating film 43, temperature-induced tensions between the different materials and flaking of the insulating film 43 can be avoided. The spacer main body 41 has, for example, a glass fiber content of 35%. At the same time, the glass fiber content in the spacer main body 41 improves strength and stability.

[0085] The first outer pane 3a and the second outer pane 3b protrude beyond the spacer 4 such that a peripheral edge region having an outer region 20 is created. The outer region 20 is filled with a seal 11. This seal 11 is formed, for example, by an organic polysulfide. Thus, optimal mechanical stabilization of the edge seal is achieved. At the same time, the inner region is protected against penetrating moisture and foreign influences from the outside.

[0086] The first outer pane 3a and the second outer pane 3b are made, for example, of soda lime glass with a thickness of 3 mm, whereas the central pane 2 is formed from soda lime glass with a thickness of 2 mm. The first outer pane 3a and the second outer pane 3b have, for example, dimensions of 1000 mm1200 mm, whereas the central pane 2 has dimensions of 980 mm1180 mm.

[0087] FIG. 4 schematically depicts the individual steps of a method according to the invention for producing an insulating glazing unit 100 according to the invention. FIG. 5 depicts a flowchart of a possible embodiment of the method according to the invention.

[0088] S1: In a first step S1, a module 10 is formed. For this, a central pane 2 is introduced into an intermediate space 7 of a retaining profile 1 introduced and four sections of the retaining profile 1 are shaped to form a complete peripheral retaining profile frame 1, which frames the central pane 2.

[0089] S2: In a second step S2, a first outer pane 3a is joined to a first pane contact surface 4.1 of a spacer 4, wherein the spacer 4 is shaped to form a peripheral spacer frame 4 in the edge region of the first outer pane 3a. The spacer frame 4 frames an inner region 9 (depicted in FIG. 4 as a dashed frame). The inner region 9 is the volume delimited, in width, length, and height, in the interior of the spacer frame. The spacer frame 4 is offset inwardly in the edge region of the first outer pane 3a and forms an outer region 20 between the outer perimeter of the spacer frame 4 and the edge of the first outer pane 3a. The connecting of the first pane contact surface 4.1 of the spacer 4 to the first outer pane 3a is done via an adhesive connection 5 using an adhesive that was applied to the first pane contact surface 4.1 before the connecting.

[0090] Of course, the steps S1 and S2 can also be carried out simultaneously or in reverse order.

[0091] S3: In a third step S3, the module 10 comprising the central pane 2 and the retaining profile frame 1 is arranged in the inner region 9 of the spacer frame 4. Spacer frame 4 and retaining profile frame 1 were coordinated such that the retaining profile frame 1 can be arranged precisely fitting within the spacer frame 4. Specifically, the width b.sub.H of the retaining profile 1 is equal to or slightly less than the width b.sub.A of the spacer 4. The central pane 2 is arranged parallel to the first outer pane 3a and thus at a constant distance therefrom.

[0092] S4: In a fourth step S4, a second outer pane 3b is joined to a second pane contact surface 2.2. The connecting is done via an adhesive connection 5 using an adhesive 5 that was applied to the second pane contact surface 2.2. The module 10 is arranged in the inner region 9 of the spacer frame 4 between the first outer pane 3a and the second outer pane 3b.

[0093] S5: In a fifth step S5, the pane assembly comprising the first outer pane 3a, the second outer pane 3b, and the spacer frame 4 is pressed together and thus fixedly bonded in a durable manner.

[0094] Of course, a quadruple glazing unit or a multiple glazing unit can be produced by arranging two or more modules 10 parallel to one another. Alternatively, a module 10 can also have more than one central pane 2 secured in additional intermediate spaces 7. The additional intermediate spaces 7 can, for example, be formed by additional retaining strips 6. In this manner as well, a quadruple glazing unit or multiple glazing unit can be produced economically.

[0095] FIG. 6 depicts a detail of a cross-section through an alternative module 10 according to the invention, wherein a central pane 2 is secured in an alternative retaining profile frame 1. The retaining profile 1 of the retaining profile frames 1 has, in this example, a plurality of openings 12 and here, for example, two openings 12 per side, into which the retaining profile main body 1.1 has pierced. The openings 12 form a through cutout from the side facing the central 2 to the side facing away from the central pane 2. The openings 12 facilitate, among other things, the exchange of gas during filling of the insulating glazing unit with protective gas as well as the diffusion of moisture out of the inner region 9 to the desiccant in the hollow chambers 42 of the spacer 4. The openings 12 are, for example, circular and have, for example, a diameter of 2 mm.

[0096] In the example depicted, four spacing strips 8, for example, are in each case arranged on the retaining profile 1. The spacing strips 8 have a plurality of discontinuities 14, for example, three discontinuities 14 in each case, each with a length of 10 cm. The discontinuities 14 of the spacing strips 8 enable, in particular in combination with the openings 12, a particularly effective and selective gas exchange between the first inner subregion 9.1 and the second inner subregion 9.2, both during the filling with protective gas and also during the subsequent use of the insulating glazing unit 100 at the site of use. The openings 12 and the spacing strips 8 are, for example, arranged such that a gas exchange between the first inner subregion 9.1 and the second inner subregion 9.2 can occur. In other words, the openings 12 and the spacing strips 8 form an open channel system through which a gas exchange can take place.

[0097] The combination of openings 12 and spacing strips 8 has a number of special advantages. First, the escape of air or protective gas from the first inner subregion 9.1 during assembly of the retaining profile frame 1 plus central pane 2 into inner region 9 of the spacer frame 4 is facilitated. Furthermore, the gas exchange during filling of the inner subregions 9.1,9.2 between the panes with protective gas is facilitated. Furthermore, the diffusion of moisture out of the inner subregions 9.1,9.2 to the desiccant in the hollow chamber 42 of the spacer 4 is facilitated. Furthermore, pressure fluctuations between the two inner subregions 9.1,9.2 are more readily compensated. These result from the fact that, in everyday use, insulating glazing units 100 are subject to strong temperature fluctuations and temperature differences between the inner side and the outer side. These are caused, on the one hand, by different temperatures in the inner and outer region of the insulating glazing unit as well as by heating from sunlight and cooling from shadows. If one of the panes is coated, for example, by an infrared reflecting coating that is transparent to visible light, the effect of asymmetric heating is further amplified. The temperature differences result in temperature fluctuations in the gas-filled, sealed pane inner region 9 and thus in a different volume change of the gas in the inner subregions 9.1,9.2 between the panes. This can result in an undesirable mechanical loading of the central pane 2. By means of the system of openings 12 and discontinuous spacing strips 8, pressure equalization between the inner subregions 9.1,9.2 can occur and the mechanical loading of the central pane 2 is reduced. This was unexpected and surprising for the person skilled in the art.

LIST OF REFERENCE CHARACTERS

[0098] 1 retaining profile [0099] 1.1 main body of the retaining profile 1 [0100] 1 retaining profile frame [0101] 2 central pane [0102] 3a,3b outer pane [0103] 4 spacer [0104] 4.1 first pane contact surface [0105] 4.2 second pane contact surface [0106] 4.4 outer surface [0107] 4.5 inner surface [0108] 4 spacer frame [0109] 5 adhesive connection [0110] 6 retaining strip [0111] 7 intermediate space [0112] 8 spacing strip [0113] 9 inner region [0114] 9.1,9.2 inner subregion [0115] 10 module [0116] 11 seal [0117] 12 opening [0118] 15 discontinuity [0119] 20 outer region [0120] 41 spacer main body [0121] 42 hollow chamber [0122] 43 insulating film [0123] 44 outer surface of the spacer 4 [0124] 45 inner surface of the spacer 4 [0125] 100 insulating glazing unit [0126] b.sub.A width of the spacer 4 [0127] b.sub.a width of the spacing strip 8 [0128] b.sub.H width of the retaining profile 1 [0129] b.sub.h width of the retaining strip 6 [0130] h.sub.A height of the spacer 4 [0131] h.sub.a height of the spacing strip 8 [0132] h.sub.H height of the retaining profile 1 [0133] h.sub.h height of the retaining strip 6 [0134] S1,S2,S3,S4,S5 step