EP3818232B1 - Cover element for busbar - Google Patents

Description

The invention relates to insulating glazing containing a spacer and the use of insulating glazing.

Insulating glazing is used extensively as glazing in buildings. Insulating glazing is also increasingly being installed in glass facades for aesthetic reasons, especially if the facade is optically designed as an all-glass facade.

Insulating glazing consists of at least two panes that are kept at a distance from each other by a spacer. The panes may have a coating, such as a thermal and/or solar control coating. Coatings containing silver in particular enable low transmission of infrared radiation and thus reduce the temperature inside the building. The thermal insulation of insulating glazing is significantly better than that of single glazing and can be further improved with triple glazing.

In addition to the important property of thermal insulation, functional as well as optical and aesthetic features are increasingly playing an important role in the field of building glazing. Functional coatings or functional elements are generally required for this. Such functional coatings or functional elements usually have to be electrically contacted with a supply voltage, for which further components, such as connection elements and busbars, have to be provided. In principle, each additional component increases the complexity of insulating glazing and can worsen the insulating effect.

In addition, the optical transparency and the overall optical impression of the insulating glazing are often impaired. For example, insulating glazing with an electrochromic coating requires electrical connections and busbars. A problem associated with, for example, the busbars present in insulating glazing is that the busbars are visible from the outside which reduces the visible area of the window and is also unattractive from an aesthetic point of view.

The prior art has typically resorted to an opaque coating, usually screen printed onto a disk, or an opaque component applied to a disk so as to obscure the busbar. However, such a solution is associated with a number of disadvantages.

On the one hand, this requires an additional production step to apply the opaque coating or component, which increases production costs and processing time. Second, the aesthetic benefit is limited because relatively large areas of the pane must be provided with the opaque coating or component to achieve adequate coverage of the busbar, unduly limiting the visible area of the insulating glass. In addition, for reasons of production technology, the opaque coating or component and the spacer used usually have different colors, which is also undesirable for aesthetic reasons.

In addition, the opaque coating or component can also affect the thermal properties of insulating glazing, as they usually have different thermal characteristics, e.g. thermal expansion, than the panes, which can lead to mechanical stress or even thermal breakage during temperature changes.

EP 2626496 A1 relates to a spacer comprising outer sidewalls, each sidewall having an inner projection. The document also describes an insulating pane comprising at least two glazing panes spaced from the spacer profile, the inner projections of the spacer profile being in the formed space and serving to retain a space element located in the space.

EP 2628884 A2 describes a kit for insulating glass, comprising a plurality of spacer elements, each spacer element being made of plastic and comprising at least one metallic insert, the spacer elements in one embodiment having a projection on a side surface of the spacer element which protrudes into the interior of the insulating glass.

WO 2006/075922 A1 relates to an insulating glass comprising an inner roller shutter and a spacer, the spacer having a protruding part in the space between the insulating glass, which is shaped as a rail or wing and is provided with a sliding element.

DE 3432113 A1 relates to a pane assembly formed by spacers and panes with reflector profiles arranged in the air gap, which are used to control the passage of light through the pane assembly, the reactor profiles being able to be suspended in the spacers at the front and these spacers having extensions.

US6108999A describes a window glazing unit comprising a first pane of glass, a shatter resistant thermoplastic pane and a second pane of glass. In one drawing, a spacer is shown separating the first and second glass panes and having a depression in the center in which the thermoplastic sheet is placed. The spacer has projections on both sides of the depressions.

U.S. 2014/247475 A1 relates to an insulating glass unit comprising a first glass substrate, a second glass substrate, an electrochromic device positioned on the first or second glass substrate, two bus bars electrically connected to the electrochromic device, and a spacer. The spacer may have cutouts or notches at the top and bottom inside corners of the spacer.

DE 10 2015 004913 A1 and SE 513 554 C2 also disclose insulating glazing comprising at least two panes and at least one spacer, in which the at least two panes form at least one glazing interior with the spacer.

The object of the present invention was therefore to overcome the problems in the prior art listed above. In particular task The object of the invention was to improve the aesthetic appearance and to increase the transparent surface of an insulating glass pane in which there are elements to be concealed, such as busbars, as for example in the case of an insulating glass pane with electrochromic coating. The task was also to produce such insulating glazing more cost-effectively and to improve its thermal stability.

The inventors have now found that this object can be achieved by attaching a privacy screen directly to the spacer of the insulating glazing to conceal the area where the component to be concealed, such as a bus bar, is located in the insulating glazing.

The object of the present invention is therefore achieved according to the invention by an insulating glazing according to claim 1. Preferred embodiments emerge from the dependent claims.

• der ein Grundkörper A ist, der eine erste Scheibenkontaktfläche, eine parallel dazu verlaufende zweite Scheibenkontaktfläche, eine Verglasungsinnenraumfläche und eine Außenfläche aufweist, oder
• der ein Grundkörper B ist, der eine erste Scheibenkontaktfläche und eine parallel dazu verlaufende zweite Scheibenkontaktfläche, eine erste Verglasungsinnenraumfläche, eine zweite Verglasungsinnenraumfläche, eine erste innere Seitenfläche, eine zweite innere Seitenfläche und eine Außenfläche aufweist, wobei die beiden inneren Seitenflächen zwischen den beiden Scheibenkontaktflächen und parallel dazu verlaufen und zusammen mit den beiden Verglasungsinnenraumflächen und der Außenfläche eine Nut zur Aufnahme einer Scheibe ausbilden, wobei der Abstandshalter mindestens eine auf der Verglasungsinnenraumfläche des Grundkörpers A oder mindestens eine auf mindestens einer der beiden Verglasungsinnenraumflächen des Grundkörpers B angeordnete und parallel zur beiden Scheibenkontaktflächen verlaufende Sichtschutzwand aus undurchsichtigem Material aufweist.

Accordingly, the present invention relates to insulating glazing, the spacer comprising a base body,

• which is a base body A having a first pane contact surface, a second pane contact surface running parallel thereto, a glazing interior surface and an exterior surface, or
• which is a base body B, which has a first pane contact surface and a second pane contact surface running parallel thereto, a first glazing interior surface, a second glazing interior surface, a first inner side surface, a second inner side surface and an outer surface, the two inner side surfaces between the two pane contact surfaces and parallel thereto and, together with the two interior glazing surfaces and the exterior surface, form a groove for receiving a pane, the spacer being at least one on the interior glazing surface of the base body A or at least one on at least one of the two interior glazing surfaces of the base body B and parallel to the has a screen wall made of opaque material running along both pane contact surfaces.

A significant improvement in the aesthetic appearance of the insulating glazing can be achieved by using the spacer in insulating glazing which has components to be covered, such as busbars. For example, compared to an opaque coating mentioned above, the coverage area can be made smaller with the same effect because the privacy window is closer to the component to be covered. This also increases the transparent surface of the insulating glazing. Furthermore, the screening wall and the spacer can easily have the same color, which is necessarily the case in some embodiments, which makes the appearance more uniform.

Another advantage is that no additional production steps, such as the application of a screen print, are required for the cover, which reduces production costs and shortens processing times. In addition, this leads to improved thermal properties of the insulating glazing, since the use of opaque coatings for covering, which have different thermal properties compared to the panes used, can be avoided. With normal insulating glazing, breakage can occur when the temperature changes if the area of the screen print to cover is too large. Larger coverage areas are possible thanks to the spacers.

The invention is explained in detail below.

In the present specification and appended claims, the following relative spatial assignments apply to the spacer and, correspondingly, to the insulating glazing containing the spacer, unless otherwise specified. The outer surface of the spacer is "down" and the glazing interior surface is "up". Accordingly, the disc contact surfaces are "lateral". The direction from a side contact surface to a perpendicular at the center of the outer surface of the spacer is from "outside" to "inside". Accordingly, the two side contact surfaces are on the outside.

The width of a base body relates to the direction from the first side contact area to the second side contact area. The height of a body relates to the direction from the exterior surface to the interior glazing surface(s). The longitudinal direction is correspondingly perpendicular to the width and height along the side contact area. Cross-section refers to the cross-section across the two disc contact surfaces unless otherwise noted.

Insulating glazing comprises at least two panes that are kept at a distance from one another by a spacer. Another name for insulating glazing is multi-pane insulating glass. For example, there is double-pane insulating glass, which comprises two panes, and triple-pane insulating glass, which comprises three panes, and four-pane insulating glass, which comprises four panes.

The spacer for insulating glazing comprises a base body and at least one screening wall.

Spacers that space two panes apart are common. These can be used in general for multi-pane insulating glass, such as double-pane insulating glass, triple-pane insulating glass and four-pane insulating glass. Accordingly, two or three such spacers are required for three-pane insulating glass and four-pane insulating glass, a first spacer for spacing one outer pane from the inner pane and a second spacer for spacing the other outer pane from the inner pane. Spacers are also used, which can space three panes apart.

A body of a spacer that can hold two panes at a distance from each other is referred to herein as body A. A body of a spacer that can keep three panes at a distance from one another is referred to here as base body B. Unless otherwise specified, the term "body" as used herein generally refers to both body A and body B.

The spacer comprises a base body, which is a base body A described below, or a base body, which is a base body B described below.

The base body A has a first pane contact surface, a second pane contact surface running parallel to the first pane contact surface, a glazing interior surface and an outer surface. The outer surface, often also referred to as the bonding surface, can be connected directly to the first and second disc contact surfaces. In a preferred embodiment, the outer surface is connected to the first and/or the second disk contact surface via connecting surfaces, i.e. via a first connecting surface to the first disk contact surface and/or via a second connecting surface to the second disk contact surface, with both disk contact surfaces preferably being connected via such connecting surfaces to the outer surface are connected. For example, the connecting surface may be at an angle in the range of 30° to 60° to the outer surface. The two disk contact surfaces are generally approximately perpendicular or perpendicular to the plane in which the outer surface is located.

The glazing interior surface of the base body A can usually be connected directly to the first and second pane contact surfaces. This direct connection is generally preferred, but the glazing interior surface can also be connected to the first and/or the second pane contact surface via connection surfaces. In this way, each pane contact surface is connected directly or indirectly to the exterior surface on one side and directly or indirectly to the interior glazing surface on the opposite side. The two pane contact surfaces are generally approximately perpendicular or perpendicular to the plane in which the interior glazing surface is located. It usually is preferred that the outer surface and glazing interior surface run parallel to each other.

The base body A can optionally have one or more cavities in the interior. The glazing interior surface preferably has openings in order to facilitate the absorption of atmospheric moisture by desiccants that may be present in the base body.

It goes without saying that the dimensions of the base body depend on the dimensions of the insulating glazing in which it is to be used. The width of the base body A can be, for example, in the range of 4 to 30 mm, preferably 8 to 16 mm. The height of the base body A can be, for example, in the range from 5 to 15 mm, preferably 5 to 10 mm.

The base body B, which is suitable for the spacing of three panes, has a first pane contact surface and a second pane contact surface running parallel to the first pane contact surface, a first glazing interior surface, a second glazing interior surface, a first inner side surface, a second inner side surface and an outer surface. The two inner side surfaces run between the two pane contact surfaces and parallel thereto and together with the two glazing interior surfaces and the outer surface form a groove for receiving a pane. The groove is suitable for accommodating an inner or third pane. As already mentioned, two individual spacers can also be used for three-pane insulating glass to separate two panes.

The outer surface of the base body B can be connected directly to the first and second disc contact surfaces. In a preferred embodiment, the outer surface is connected to the first and/or the second disk contact surface via connecting surfaces, i.e. via a first connecting surface to the first disk contact surface and/or via a second connecting surface to the second disk contact surface, with both disk contact surfaces preferably having such connecting surfaces with the outer surface are connected. the For example, the connecting surface may be at an angle in the range of 30° to 60° to the outer surface. The two disk contact surfaces are generally approximately perpendicular or perpendicular to the plane in which the outer surface is located.

The first glazing interior surface of the base body B can usually be connected directly to the first pane contact surface and the first inner side surface. The direct connection is generally preferred, but the first interior glazing surface can also be connected to the first pane contact surface and/or the first inner side surface via connection surfaces. The side of the first interior side surface opposite the side that is bonded to the first interior glazing surface is typically bonded to the exterior surface in an interior region thereof. The second glazing interior surface of the base body B can usually be connected directly to the second pane contact surface and the second inner side surface. This direct connection is generally preferred, but the second interior glazing surface can also be connected to the second pane contact surface and/or the second inner side surface via connection surfaces. The side of the second interior side surface opposite the side that is bonded to the second interior glazing surface is typically bonded to the exterior surface in an interior region thereof.

The two pane contact surfaces are generally approximately perpendicular or perpendicular to the plane in which the first and second interior glazing surfaces are located. As a rule, it is preferred that the outer surface and the two inner glazing surfaces run parallel to one another.

The base body B can optionally have one or more cavities in the interior, eg a cavity between the first disk contact surface and the first inner side surface and a cavity between the second disk contact surface and the second inner side surface. The two interior glazing surfaces preferably have openings in order to facilitate the absorption of atmospheric moisture by desiccants that may be present in the base body.

It goes without saying that the dimensions of the base body depend on the dimensions of the insulating glazing in which it is to be installed. The width of the base body B can be, for example, in the range from 10 to 50 mm, preferably 20 to 36 mm. The height of the base body B can be, for example, in the range from 5 to 15 mm, preferably 5 to 10 mm.

The spacer has at least one privacy wall made of opaque material.

In the case of the spacer with the base body A, the at least one screening wall is located on the interior glazing surface of the base body. In the case of the spacer with the base body B, the at least one screening wall is located on at least one of the two interior glazing surfaces of the base body B. The at least one screening wall runs parallel to the first pane contact surface and parallel to both the base body A and the base body B the first disc contact area.

The privacy wall is made of opaque material, so that an object located behind the wall cannot be seen.

The height of the privacy screen can vary as required and depends, among other things, on the position and dimensions of the element to be concealed in the insulating glazing, the position of the privacy screen relative to the element to be concealed and the desired degree of privacy with regard to the viewing angles to be considered.

The height h of the privacy screen refers to the distance between the interior glazing surface on which the privacy screen is located and the top of the privacy screen. In general, it has proven to be useful if the height h of the screening wall is the same as or higher than the height of the element to be covered, eg a bus bar. The height of the element to be covered is understood to be the distance between the plane of the interior glazing surface on which the screening wall is located and the upper end of the element to be covered.

The screen wall can have a height h in the range from 2 to 50 mm, preferably from 4 to 40 mm, particularly preferably from 4 to 15 mm. The height h is as defined above, compare also 4 .

The spacer comprising a base body, which is the base body A, preferably has one or two screening walls, more preferably one screening wall. The spacer comprising a base body, which is the base body B, preferably has one, two, three or four screen walls, more preferably one or two screen walls.

The screen wall is usually located along the entire length of the base body. However, it is possibly conceivable that the screening wall is located over only part of the length of the base body.

The screen wall is preferably arranged in the edge area of the glazing interior surface. The edge area can be the area close to the first or second side contact surface (in the case of base body A or base body B) or to the first or second inner side surface (in the case of base body B).

The privacy wall can have any geometry in cross section, which can be selected according to the expediency. The screening wall can, for example, have a rectangular basic shape in cross section, or the screening wall can taper in cross section at least partially from bottom to top, for example trapezoidal or triangular.

The basic rectangular shape includes, for example, a rectangular shape or a rectangular shape with rounded edges at the top of the privacy screen. A screening wall which at least partially tapers from bottom to top in cross-section, preferably conically tapering, can be advantageous for manufacturing and/or stability reasons. In this embodiment, it is particularly advantageous if one side of the privacy screen is flush with the respective side surface, i.e. with the first side contact surface, the second side contact surface, the first inner side surface or the second inner side surface, and the opposite side of the privacy screen is at least partially tapers from bottom to top, in particular conically tapered. In an alternative embodiment, the screening wall, which at least partially tapers in cross section from bottom to top, can be trapezoidal or have a triangular shape.

The width of the privacy screen can vary noticeably. If the screening wall tapers, there is also no uniform width. In general, the maximum width of the privacy wall, typically the width at the bottom of the privacy wall, is less than 40%, preferably less than 30%, of the width of the interior glazing panel on which the privacy panel is located. If the screening wall has an essentially uniform width, i.e. does not taper, e.g. in the case of the rectangular basic shape, the width b can be in the range from 0.2 to 5 mm, preferably from 0.5 to 3 mm.

In preferred embodiments, at least one screening wall is flush with the first or second pane contact surface on the outward-facing side and/or at least one screening wall is flush with the first or second inner side surface on the inward-facing side.

The base body (base body A or base body B) of the spacer can be formed in one piece with the at least one screening wall or the base body (base body A or base body B) and the at least one screen wall form separate parts that are connected to one another.

If the base body and the at least one screening wall are separate parts, they can be connected to one another in any manner known to those skilled in the art, e.g. by gluing or a plug-in or clip system. The bonding can be done, for example, by means of an adhesive layer or tapes that are adhesive on both sides. Suitable plug and clip systems can also be used. In the case of a plug-in or click system, the base body and screen wall can be provided with appropriate connectors, for example, which enable them to be plugged together. If the body and screen are made of metal, a connection can also be made by soldering.

In a particularly preferred embodiment, the base body is formed in one piece with the at least one screening wall, i.e. the base body and the at least one screening wall are made of one piece or are monolithic. This is particularly advantageous when the base body and the at least one screen are formed from an extrudable material such as plastic. In this case, the base body can be produced together with the privacy screen or walls in one step by extrusion.

The base body (base body A or base body B) and the at least one screening wall can be formed from a different material or from the same material. The base body and the at least one screening wall are preferably made of the same material. If the base body is designed in one piece with the at least one screening wall, this is usually the case.

The base body and the at least one screening wall are preferably formed independently of one another from metal or plastic. Examples of suitable metals are steel and aluminum. Plastic is preferred, although materials with lower thermal conductivity, so-called "warm edge" systems, can be used to advantage. Plastic base bodies are also referred to as polymer base bodies.

The usual polymers can be used for the plastic base body and the plastic screening wall. The base body and the screening wall contain, for example, independently of one another, polyethylene (PE), polycarbonate (PC), polypropylene (PP), polystyrene, polybutadiene, polynitrile, polyester, polyurethane, polymethyl methacrylate, polyacrylate, polyamide, polyethylene terephthalate (PET), silicone, polybutylene terephthalate (PBT ), preferably acrylonitrile-butadiene-styrene (ABS), acrylester-styrene-acrylonitrile (ASA), acrylonitrile-butadiene-styrene-polycarbonate (ABS/PC), styrene-acrylonitrile (SAN), PET/PC, PBT/PC and/ or copolymers or mixtures thereof. The base body and the screening wall are preferably made of the same material. However, they can also be made of different materials, in particular different polymeric materials. This could be advantageous for cost reasons, for example.

The plastics used for the base body and/or the screening wall are preferably thermoplastic materials. The base body and the screening wall made of such a material can be produced as a prefabricated profile, either as separate parts which are then connected to one another, or in one piece, and the spacer obtained is then fixed between the panes to produce the insulating glazing. In this case, the disc contact surfaces of the spacer are connected to the discs via a sealant.

Alternatively, the body and at least the privacy wall can be extruded directly onto the pane, in this case as one piece. As a rule, no separate sealant is then required for the connection to the pane, the base body is connected directly to the pane. For this purpose, for example, injectable thermoplastic spacers (TPS spacers) made of sealing materials such as polyisobutylene and butyl rubber are used, which can contain desiccants in the matrix. These sealing materials can also be used to produce the base body and at least the screening wall in one piece.

The base body and the screening wall, in particular those made of plastic, can optionally contain one or more additives independently of one another, which are customary for such materials, for example desiccants, coloring agents, for example pigments or dyes, reinforcing materials, fillers, light stabilizers, stabilizers, release agents and the like. Desiccants can be contained in cavities or recesses in the base body or in the plastic matrix of the base body or the screening wall. Other additives are usually included in the plastic matrix of the body and/or privacy wall. Examples of suitable desiccants are silica gels, molecular sieves, CaCl ₂ , Na ₂ SO ₄ , activated carbon, silicates, bentonites, zeolites and/or mixtures thereof.

In a preferred embodiment, the base body is not transparent, i.e. opaque like the screening wall. The base body and the at least one screening wall can have a different color or preferably the same color. Common colors for the base body and/or the privacy screen are, for example, black, white, brown, or gray, especially when it comes to a base body or a privacy screen made of plastic. Appropriate coloring agents, such as pigments or dyes, can be contained in the base body and/or the screening wall for coloring purposes. As an alternative or in addition, the base body and/or the screening wall can be provided with a colored coating. In the case of a base body and/or a screen made of metal, the color usually results from the material used. It goes without saying that in the case of one-piece spacers, the base body and the screening wall are usually made of the same material and therefore also have the same color.

The invention relates to insulating glazing which comprises at least two panes and at least one spacer as described above. It is preferably an insulating glazing consisting of two, three or four panes, preferably two or three panes. In general, the insulating glazing also has at least one element to be covered, which is to be covered by the at least one screening wall. The element to be covered is a busbar and/or a connecting line, such as an electrical one Connection element and / or an electrical contact element, which is preferably a busbar.

The at least two panes together with the spacer form at least one glazing interior, in which the element to be covered, in particular a busbar, is arranged on one pane, with the screen wall of the spacer covering the element to be covered when viewed from the outside at least from certain viewing angles.

The element to be concealed, in particular the bus bar, is attached to an inner face of one of the two outer panes or, if present, to one of the sides of an inner pane, generally at a level which is above the plane(s) which is formed by the glazing interior surface or surfaces of the spacer or spacers built into the insulating glazing. The element to be covered, in particular the busbar, is located in the glazing interior, which is formed by two panes and a glazing interior surface of the spacer.

The spacer built into the insulating glazing has been described in detail above.

According to the invention, at least the screening wall is arranged in the edge area or at the edge of the pane contact surface or the inner side surface of the spacer that is in contact with the pane to which the element to be covered, in particular the bus bar, is attached.

In a preferred embodiment of the insulating glazing according to the invention (with base body A or base body B), the at least one screening wall is therefore arranged in the edge area or at the edge of a side surface of the spacer that is in contact with the pane on which the element to be covered, in particular a busbar, is attached. In this case that is to be covered Element, in particular the bus bar, arranged between the screening wall and the pane on which the element to be covered is attached, it being preferred that the element to be covered, in particular the bus bar, and the screening wall are spaced apart.

Such a spacing means that the element to be covered, in particular the bus bar, and the screening wall are not in direct contact with one another. This can be advantageous in order to avoid contamination, chemical reactions and/or mechanical effects, in particular if the pane to which a bus bar is attached is provided with an electrochromic coating.

In a preferred embodiment of the insulating glazing according to the invention (with base body A or base body B), the at least one screening wall is therefore arranged in the edge area or at the edge of a side surface of the spacer that is in contact with the pane on which the element to be covered, in particular a Busbar is attached, wherein the element to be covered, in particular the busbar, and the privacy wall are spaced apart. As a result, a gap is formed between the element to be covered, in particular the bus bar, and the screening wall, the gap width preferably being in the range of 1.4 mm to 3 mm.

The privacy wall and the pane closest thereto are generally spaced apart. The gap thus formed between the screen and this pane can, for example, have a gap width of more than 1.4 mm to 3.1 mm.

If the element to be covered is attached to the inner pane of three-pane insulating glass or four-pane insulating glass, it may also be preferable for two privacy screens to be arranged in the edge area or at the edge of the two pane contact surfaces or inner side surfaces that are in contact with the inner pane are.

In an advantageous embodiment of the insulating glazing according to the invention, the panes can be made of flat glass, float glass, soda-lime glass, quartz glass or borosilicate glass, independently of one another. The thickness of each slice can vary and thus be adapted to the requirements of the individual case. Preferably discs with standard thicknesses from 1 mm to 19 mm and preferably from 2 mm to 8 mm are used. The discs can be colorless or colored. At least one pane can be designed as structured glass.

The panes of the insulating glazing are, in particular, insulating glass panes, laminated panes or single glass panes. A composite pane can comprise at least two panes which are connected to one another via an intermediate layer. The intermediate layer can preferably be a thermoplastic such as polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU), polyethylene terephthalate (PET) or several layers thereof, preferably with thicknesses of 0.3 mm to 0.9 mm.

The insulating glazing preferably comprises at least one pane, which is a float glass pane, a laminated pane, structured glass or colored or frosted glass. More preferably, at least one pane is a float glass pane.

In a preferred embodiment, at least one pane of the insulating glazing has at least partially an electrically conductive and/or electrically switchable coating or an electrically switchable and/or electrically conductive functional element. The electrically conductive and/or electrically switchable coating or the electrically switchable and/or electrically conductive functional element is generally provided on an inside of one of the two outer panes or, if present, on one of the sides of an inner pane. Such a coating or such a functional element can function, for example, as lighting, heating or an antenna, or can be used in electrically switchable glazing such as displays or electrochromic glazing. Such a coating or such a functional element can also be suitable, for example, for an alarm glass for burglar alarms or a glass for protection against electromagnetic radiation.

The electrically switchable and/or electrically conductive coating or the electrically switchable and/or electrically conductive functional element is preferably an electrochromic coating, a transparent, electrically conductive coating or one or more photovoltaic elements such as solar cells for generating electricity, with an electrochromic coating being particularly preferred.

The electrochromic coating preferably comprises at least two electrode layers and two electrochemically active layers located between the two electrode layers, which are separated from one another by an electrolyte layer. The two active layers are each capable of reversibly intercalating small ions, with at least one of the two layers consisting of an electrochromic material which has different oxidation states which correspond to the intercalated and deintercalated state of the ions and have a different colour. By applying electrical voltages of different polarity, the incorporation and deintercalation of the ions can be controlled in order to specifically influence the optical transmission of the coating.

The transparent, electrically conductive coating can be permeable to electromagnetic radiation, preferably electromagnetic radiation with a wavelength of 300 to 1300 nm, in particular visible light of 390 nm to 780 nm. "Transparent" means that the overall transmission of the pane is particularly preferably >70% and in particular >75% permeable for visible light.

The transparent, electrically conductive coating is preferably a functional coating, more preferably a functional coating with a sun protection effect. A coating with a sun protection effect has reflective properties in the infrared range. The transparent, electrically conductive coating can have particularly low emissivities (Low-E). This advantageously reduces heating of the interior of a building as a result of solar radiation.

Such coatings typically contain at least one metal, in particular silver or a silver-containing alloy. The transparent, electrically conductive coating can comprise a sequence of several individual layers, in particular at least one metallic layer and dielectric layers, which contain at least one metal oxide, for example. The metal oxide preferably includes zinc oxide, tin oxide, indium oxide, titanium oxide, silicon oxide, aluminum oxide, or the like, and combinations of one or more thereof. The dielectric material may also include silicon nitride, silicon carbide, or aluminum nitride. This layered structure is generally obtained by a sequence of deposition operations carried out by a vacuum process such as magnetic field assisted sputtering.

Particularly suitable transparent, electrically conductive coatings contain at least one metal, preferably silver, nickel, chromium, niobium, tin, titanium, copper, palladium, zinc, gold, cadmium, aluminum, silicon, tungsten or alloys thereof, and/or at least one metal oxide layer , preferably tin-doped indium oxide (ITO), aluminum-doped zinc oxide (AZO), fluorine-doped tin oxide (FTO, SnO2:F), antimony-doped tin oxide (ATO, SnO2:Sb), and/or carbon nanotubes and/or optically transparent, electrically conductive polymers, preferably poly(3,4-ethylenedioxythiophene), polystyrene sulfonate, poly(4,4-dioctylcyclopentadithiophene), 2,3-dichloro-5,6-dicyano-1,4-benzoquinone, mixtures and/or copolymers from that

The transparent, electrically conductive coating preferably has a layer thickness of 10 nm to 5 μm and particularly preferably of 30 nm to 1 μm. The surface resistance of the transparent, electrically conductive coating is, for example, from 0.35 ohms/square to 200 ohms/square, preferably from 0.6 ohms/square to 30 ohms/square and in particular from 2 ohms/square to 20 ohms/square.

For contacting the electrically switchable and/or electrically conductive coating, in particular the electrochromic coating, or the electrically switchable and/or electrically conductive functional element, in particular additionally provided at least two busbars, which are electrically connected to the coating or the functional element.

The bus bar is an element to be concealed, as described above. The bus bar is, for example, in the form of a strip or a wire. The bus bar is preferably arranged on a pane in a glazing interior formed by two panes and a glazing interior surface of the spacer. The busbar runs in particular parallel to the glazing interior surface of the spacer.

The busbar is made of an electrically conductive material such as silver, copper, copper alloy, or aluminum. It can be produced, for example, by printing a conductive silver paste onto the electrically conductive and/or electrically switchable coating for electrical contacting. The conductive silver paste contains silver particles and optionally glass frits. The layer thickness of the baked conductive paste is, for example, about 5 µm to 20 µm. The bus bar may also be formed from metal foil strips or metal wires containing or formed from copper, a copper alloy, or aluminum. The metal foil strips or metal wires can be applied to the electrically conductive and/or electrically switchable coating by means of an electrically conductive adhesive.

Furthermore, the insulating glazing preferably has one or more, preferably at least one or two, electrical connection elements for connection to a power supply and one or more, preferably at least one or two, electrical contact elements for electrically connecting the bus bars to the electrical connection elements.

The connection elements can be, for example, a cable and/or a flexible printed circuit board with at least one electrical component. The cable can be a flat cable or a round cable, for example. The cable can have one or more conductors. Flexible printed circuit boards usually have a flexible plastic carrier on which an electronic circuit is printed.

The electrical contact element for the electrical connection of the busbars to the electrical connection element is, for example, a spring contact, or contact is preferably made by means of soldering, but adhesive contacts are also conceivable.

A variant of a double-pane insulating glass and two variants of a triple-pane insulating glass are described below for the insulating glazing according to the invention. With regard to the individual components listed there for these preferred embodiments of the insulating glazing, reference is also made to the above statements on this, which also apply to them.

• eine erste Scheibe und eine zweite Scheibe, wobei eine innenseitige Oberfläche der ersten Scheibe oder der zweiten Scheibe zumindest teilweise eine elektrisch schaltbare und/oder elektrisch leitfähige Beschichtung oder ein elektrisch schaltbares und/oder elektrisch leitfähiges Funktionselement sowie mindestens zwei Sammelleiter zur Kontaktierung der Beschichtung oder des Funktionselements aufweist,
• einen die erste und zweite Scheibe umlaufenden Abstandshalter, der ein Abstandshalter mit dem Grundkörper A ist, wobei die erste Scheibe mit der ersten Scheibenkontaktfläche des Abstandshalters direkt oder über ein Dichtmittel verbunden ist und die zweite Scheibe mit der zweiten Scheibenkontaktfläche des Abstandshalters direkt oder über ein Dichtmittel verbunden ist,
• einen zwischen der Verglasungsinnenraumfläche des Abstandshalters und der ersten und der zweiten Scheibe gebildeten Verglasungsinnenraum,
• einen äußeren Scheibenzwischenraum angrenzend an die Außenfläche, in dem eine äußere Abdichtung eingebracht ist, und
• ein oder mehrere elektrische Anschlusselemente zur Verbindung mit einer Stromversorgung und ein oder mehrere elektrische Kontaktelemente zur elektrischen Verbindung der Sammelleiter mit den elektrischen Anschlusselementen,

wobei mindestens ein Sammelleiter sich im Verglasungsinnenraum befindet und bei Betrachtung von außen zumindest unter bestimmten Blickwinkeln die mindestens eine Sichtschutzwand des Abstandshalters den Blick auf den Sammelleiter verdeckt.In a preferred embodiment, the insulating glazing comprises:

• a first pane and a second pane, wherein an inside surface of the first pane or the second pane has at least partially an electrically switchable and/or electrically conductive coating or an electrically switchable and/or electrically conductive functional element as well as at least two busbars for contacting the coating or the has functional element,
• a spacer surrounding the first and second panes, which is a spacer with the base body A, the first pane being connected to the first pane contact surface of the spacer directly or via a sealant and the second pane being connected to the second pane contact surface of the spacer directly or via a sealant connected is,
• a glazing cavity formed between the glazing cavity surface of the spacer and the first and second panes,
• an outer pane cavity adjacent the outer surface in which an outer seal is placed, and
• one or more electrical connection elements for connecting to a power supply and one or more electrical contact elements for electrically connecting the busbars to the electrical connection elements,

wherein at least one busbar is located in the glazing interior and when viewed from the outside at least from certain viewing angles, the at least one screening wall of the spacer covers the view of the busbar.

• eine erste Scheibe, eine zweite Scheibe und eine dritte Scheibe, wobei die dritte Scheibe (innere Scheibe) zwischen der ersten und zweiten Scheibe und parallel dazu angeordnet ist,
• wobei eine innenseitige Oberfläche der ersten Scheibe oder der zweiten Scheibe oder eine Oberfläche der dritten Scheibe zumindest teilweise eine elektrisch schaltbare und/oder elektrisch leitfähige Beschichtung oder ein elektrisch schaltbares und/oder elektrisch leitfähiges Funktionselement sowie mindestens zwei Sammelleiter zur Kontaktierung der Beschichtung oder des Funktionselements aufweist,
• einen ersten Abstandshalter, der ein Abstandshalter mit dem Grundkörper A ist, und einen zweiten Abstandshalter, wobei der zweite Abstandshalter ebenfalls ein Abstandshalter mit dem Grundkörper A ist oder ein üblicher Abstandshalter ist, der eine erste Scheibenkontaktfläche, eine parallel dazu verlaufende zweite Scheibenkontaktfläche, eine Verglasungsinnenraumfläche und eine Außenfläche aufweist, wobei der erste Abstandshalter die erste und dritte Scheibe umläuft, wobei die erste Scheibe mit der ersten Scheibenkontaktfläche des ersten Abstandshalters direkt oder über ein Dichtmittel verbunden ist und die dritte Scheibe mit der zweiten Scheibenkontaktfläche des ersten Abstandshalters direkt oder über ein Dichtmittel verbunden ist, und der zweite Abstandshalter die zweite und dritte Scheibe umläuft, wobei die zweite Scheibe mit der zweiten Scheibenkontaktfläche des zweiten Abstandshalters direkt oder über ein Dichtmittel verbunden ist und die dritte Scheibe mit der ersten Scheibenkontaktfläche des zweiten Abstandshalters direkt oder über ein Dichtmittel verbunden ist,
• einen zwischen der ersten und der dritten Scheibe und der Verglasungsinnenraumfläche des ersten Abstandshalters mit dem Grundkörper A gebildeten ersten Verglasungsinnenraum und einen zwischen der zweiten und der dritten Scheibe und der Verglasungsinnenraumfläche des zweiten Abstandshalters gebildeten zweiten Verglasungsinnenraum,
• einen ersten äußeren Scheibenzwischenraum angrenzend an die Außenfläche des ersten Abstandshalters mit dem Grundkörper A, in dem eine äußere Abdichtung eingebracht ist, und einen zweiten äußeren Scheibenzwischenraum angrenzend an die Außenfläche des zweiten Abstandshalters, in dem eine äußere Abdichtung eingebracht ist, und
• ein oder mehrere elektrische Anschlusselemente zur Verbindung mit einer Stromversorgung und ein oder mehrere elektrische Kontaktelemente zur elektrischen Verbindung der Sammelleiter mit den elektrischen Anschlusselementen,

wobei mindestens ein Sammelleiter sich im ersten oder zweiten Verglasungsinnenraum befindet und bei Betrachtung von außen zumindest unter bestimmten Blickwinkeln die mindestens eine Sichtschutzwand des ersten Abstandshalters den Blick auf den Sammelleiter verdeckt.In a further preferred embodiment, the insulating glazing comprises:

• a first pane, a second pane and a third pane, the third pane (inner pane) being disposed between and parallel to the first and second panes,
• wherein an inside surface of the first pane or the second pane or a surface of the third pane at least partially has an electrically switchable and/or electrically conductive coating or an electrically switchable and/or electrically conductive functional element and at least two busbars for contacting the coating or the functional element ,
• a first spacer, which is a spacer with the base body A, and a second spacer, the second spacer also being a spacer with the base body A or a conventional spacer, which has a first pane contact surface, a second pane contact surface running parallel thereto, a glazing interior surface and an outer surface, wherein the first spacer surrounds the first and third panes, the first pane being bonded to the first pane-contacting surface of the first spacer directly or through a sealant, and the third pane being bonded to the second pane-contacting surface of the first spacer directly or through a sealant and the second spacer surrounds the second and third panes, the second pane being connected to the second pane contact surface of the second spacer directly or via a sealant and the third pane to the first pane contact surface of the second spacer is connected directly or via a sealant,
• a first glazing cavity formed between the first and third panes and the glazing cavity surface of the first spacer with the body A and a first glazing cavity formed between the second and the second glazing interior formed by the third pane and the glazing interior surface of the second spacer,
• a first outer pane space adjacent to the outer surface of the first spacer with the body A, in which an outer seal is placed, and a second outer pane space adjacent to the outer surface of the second spacer, in which an outer seal is placed, and
• one or more electrical connection elements for connecting to a power supply and one or more electrical contact elements for electrically connecting the busbars to the electrical connection elements,

wherein at least one busbar is located in the first or second glazing interior and when viewed from the outside at least from certain viewing angles, the at least one screening wall of the first spacer covers the view of the busbar.

• eine erste Scheibe, eine zweite Scheibe und eine dritte Scheibe, wobei die dritte Scheibe (innere Scheibe) zwischen der ersten und zweiten Scheibe und parallel dazu angeordnet ist,
• wobei eine innenseitige Oberfläche der ersten Scheibe oder der zweiten Scheibe oder eine Oberfläche der dritten Scheibe zumindest teilweise eine elektrisch schaltbare und/oder elektrisch leitfähige Beschichtung oder ein elektrisch schaltbares und/oder elektrisch leitfähiges Funktionselement sowie mindestens zwei Sammelleiter zur Kontaktierung der Beschichtung oder des Funktionselements aufweist,
• einen die erste und zweite Scheibe umlaufenden Abstandshalter, der ein Abstandshalter mit dem Grundkörper B ist, wobei die erste Scheibe mit der ersten Scheibenkontaktfläche des Abstandshalters direkt oder über ein Dichtmittel verbunden ist und die zweite Scheibe mit der zweiten Scheibenkontaktfläche des Abstandshalters direkt oder über ein Dichtmittel verbunden ist und die dritte Scheibe in der Nut des Abstandshalters aufgenommen ist,
• einen zwischen der ersten und der dritten Scheibe und der ersten Verglasungsinnenraumfläche des Abstandshalters ausgebildeten ersten Verglasungsinnenraum und einen zwischen der zweiten und der dritten Scheibe und der zweiten Verglasungsinnenraumfläche des Abstandshalters ausgebildeten zweiten Verglasungsinnenraum,
• einen äußeren Scheibenzwischenraum angrenzend an die Außenfläche des Abstandshalters, in dem eine äußere Abdichtung eingebracht ist, und
• ein oder mehrere elektrische Anschlusselemente zur Verbindung mit einer Stromversorgung und ein oder mehrere elektrische Kontaktelemente zur elektrischen Verbindung der Sammelleiter mit den elektrischen Anschlusselementen,

wobei mindestens ein Sammelleiter sich im ersten oder zweiten Verglasungsinnenraum befindet und bei Betrachtung von außen zumindest unter bestimmten Blickwinkeln die mindestens eine Sichtschutzwand des Abstandshalters den Blick auf den Sammelleiter verdeckt.In a further preferred embodiment, the insulating glazing comprises:

• a first pane, a second pane and a third pane, the third pane (inner pane) being disposed between and parallel to the first and second panes,
• wherein an inside surface of the first pane or the second pane or a surface of the third pane at least partially has an electrically switchable and/or electrically conductive coating or an electrically switchable and/or electrically conductive functional element and at least two busbars for contacting the coating or the functional element ,
• a spacer surrounding the first and second panes, which is a spacer with the base body B, the first pane being connected to the first pane contact surface of the spacer directly or via a sealant and the second pane being connected to the second pane contact surface of the spacer directly or via a sealant connected and the third disc is received in the groove of the spacer,
• a first glazing cavity formed between the first and third panes and the first glazing cavity surface of the spacer and a second glazing cavity formed between the second and third panes and the second glazing cavity surface of the spacer,
• an outer pane cavity adjacent the outer surface of the spacer in which an outer seal is placed, and
• one or more electrical connection elements for connecting to a power supply and one or more electrical contact elements for electrically connecting the busbars to the electrical connection elements,

wherein at least one busbar is located in the first or second glazing interior and when viewed from the outside at least from certain viewing angles, the at least one screening wall of the spacer covers the view of the busbar.

The sealant for connecting the side contact surface of the spacer and the disc, if used, serves on the one hand to bond the spacer and on the other hand to seal the gap between the spacer and the disc. Suitable sealants are based, for example, on butyl rubber, polyisobutylene, polyethylene vinyl alcohol, ethylene vinyl acetate, polyolefin rubber, copolymers and/or mixtures thereof. With the spacers described above, which are extruded directly onto the pane (TPS spacer), a separate sealing material is not required, as this function is already fulfilled by the spacer itself.

The one or more, preferably at least two, electrical connection elements of the insulating glazing are suitably positioned below the outer surface of the spacer. The one or more, preferably at least two, electrical connection elements of the insulating glazing are preferably routed to the outside from the sealed outer space between the panes.

The outer seal can border directly on the outer surface of the base body or be connected to it via a sealant. The sealants described above, for example, are suitable as intermediate sealants. The outer seal usually fills the entire width of the outer pane cavity or the first and second outer pane spaces between the panes.

The outer seal preferably contains a polymer or a silane-modified polymer, particularly preferably organic polysulfides, silicones, silicone rubber, which can be crosslinked at room temperature, crosslinked at high temperature, crosslinked peroxide and/or crosslinked by addition, polyurethanes and/or butyl rubber. Such substances have very good adhesion to glass, so that the outer seal is primarily used to bond the panes and contributes to the mechanical stability of the insulating glazing. In an optional embodiment, additives to increase the resistance to aging, for example UV stabilizers, can also be present.

The glazing interior formed between the panes and the spacer or spacers can be filled with air or another gas, in particular an inert gas such as argon or krypton.

The insulating glazing according to the invention is particularly suitable as interior glazing for buildings, exterior glazing for buildings or facade glazing.

The invention is explained in more detail below with reference to drawings and exemplary embodiments. The drawings are schematic representations and not to scale. The drawing does not limit the invention in any way.

Figur 1

eine Querschnittdarstellung einer Isolierverglasung mit einer elektrisch leitfähigen und/oder elektrisch schaltbaren Beschichtung auf einer Scheibenseite,

Figur 2

eine Querschnittdarstellung einer nicht erfindungsgemäßen Isolierverglasung mit einer elektrisch leitfähigen und/oder elektrisch schaltbaren Beschichtung auf einer Scheibenseite,

Figur 3a

eine Querschnittdarstellung eines Abstandhalters,

Figur 3b

eine Querschnittdarstellung eines weiteren Abstandhalters,

Figur 4

eine Querschnittdarstellung einer erfindungsgemäßen Isolierverglasung,

Figur 5

eine Querschnittdarstellung einer weiteren erfindungsgemäßen Isolierverglasung,

Figur 6

eine Querschnittdarstellung einer weiteren erfindungsgemäßen Isolierverglasung,

Fig. 7a

eine perspektivische Ansicht einer weiteren erfindungsgemäßen Isolierverglasung,

Fig. 7b

eine perspektivische Ansicht einer weiteren erfindungsgemäßen Isolierverglasung,

Fig. 8a

eine perspektivische Ansicht einer weiteren erfindungsgemäßen Isolierverglasung,

Fig. 8b

eine perspektivische Ansicht einer weiteren erfindungsgemäßen Isolierverglasung.

Show it:

figure 1

a cross-sectional view of insulating glazing with an electrically conductive and/or electrically switchable coating on one side of the pane,

figure 2

a cross-sectional view of insulating glazing not according to the invention with an electrically conductive and/or electrically switchable coating on one side of the pane,

Figure 3a

a cross-sectional representation of a spacer,

Figure 3b

a cross-sectional view of another spacer,

figure 4

a cross-sectional view of an insulating glazing according to the invention,

figure 5

a cross-sectional view of another insulating glazing according to the invention,

figure 6

a cross-sectional view of another insulating glazing according to the invention,

Figure 7a

a perspective view of another insulating glazing according to the invention,

Figure 7b

a perspective view of another insulating glazing according to the invention,

Figure 8a

a perspective view of another insulating glazing according to the invention,

Figure 8b

a perspective view of another insulating glazing according to the invention.

1 shows a representation of insulating glazing in cross section. The insulating glazing comprises a first pane 19 and a second pane 20 which are connected via a spacer 5 . The spacer 5 is fitted between the first pane 19 and the second pane 20 arranged parallel thereto. The spacer 5 has a base body which has a first pane contact surface 7.1, a second pane contact surface 7.2, which runs parallel to the first pane contact surface, an outer surface 9 and a glazing interior surface 8. The outer surface 9 is connected to the two pane contact surfaces 7.1, 7.2 via a connecting surface. The base body has a cavity 10 in which a desiccant 11 is contained. A glazing interior 3 is defined by the first pane 19, the second pane 20 and the glazing interior surface 8 of the base body. The first disc 19 is connected via a sealant 4 to the first disk contact surface 7.1 and the second disk 20 is connected via a sealant to the second disk contact surface 7.2. An outer space 13 between the panes is delimited by the first pane 19 , the second pane 20 and the outer surface 9 of the base body and is filled with an outer seal 6 .

The second pane 20 has an electrically conductive and/or electrically switchable coating 1 on the inside surface. The coating 1 extends almost completely over the inside surface of the pane, minus an edge decoating from the edge of the pane. The coating 1 is contacted by a bus bar 22 (bus bar). The insulating glazing has electrical connection elements 14, such as ribbon cables or cables, which are arranged underneath the outer surface 9 of the spacer and can be connected to a voltage source (not shown). Connection element 14 and bus bar 22 are electrically conductively connected to one another via an electrical contact element 2 . The electrical contact between the electrically conductive and/or electrically switchable coating 1 and the busbar 22 and between the busbar 22 and the contact element 2 can be established by soldering or gluing with an electrically conductive adhesive. The contact element 2 can consist of a flexible cable. The cable can be T-shaped and have two metallic contacting surfaces on its two side arms, which are provided for contacting the busbar 22 .

The bus bar 22 was produced by printing a conductive paste and electrically contacted on the electrically conductive coating 1 . The conductive paste, also known as silver paste, contains silver particles and glass frits. The layer thickness of the baked conductive paste is, for example, about 5 μm to 20 μm. Alternatively, thin and narrow metal foil strips or metal wires can also be used as busbars 22, which contain or are formed from copper, a copper alloy or aluminum. The bus bar 22 runs on the second pane in the glazing interior 3 and parallel to the glazing interior surface 8 of the base body.

The first pane has an opaque coating 23 on the outside which is a black coating. The coating is applied in the form of a strip and is located approximately in an area at the level between the glazing interior surface 8 and the upper end of the busbar 22. The opaque coating 23 can be approximately 15 to 30 mm wide (from the edge of the glass). The coating 23 restricts the see-through area of the insulating glazing and completely covers the bus bar 22 when viewed from the outside within a certain viewing angle range.

2 shows a representation of an insulating glazing not according to the invention in cross section. The insulating glazing corresponds to the in 1 insulating glazing shown, except that the in 1 spacer shown is replaced by a spacer and the in 1 shown opaque coating 23 is not present. Apart from these differences, the information applies to 1 also for 2 , which is referred to.

The spacer 5 has a base body which has a first pane contact surface 7.1, a second pane contact surface 7.2, which runs parallel to the first pane contact surface, an outer surface 9 and a glazing interior surface 8. The base body has a cavity 10 in which a desiccant 11 is contained. Furthermore, the spacer 5 has a screen wall 12 on the glazing interior surface 8, which is arranged at the edge of the first pane contact surface 7.1.

The electrically conductive and/or electrically switchable coating 1 is an electrochromic coating.

The base body is formed in one piece with the screening wall 12 and can be produced in one step by an extrusion process. The base body and the screen are made of the same material, which is opaque and can be of any colour, preferably black, grey, white or brown. The base body has, for example, a height of about 6 mm and a width of about 15 mm. The dimensioning is of course based on the respective requirements adapt, for example, the width must be adapted to the requirements of good thermal insulation. The screen wall is rectangular and has a height of about 10 mm. The width of the privacy screen is about 1 mm.

The first pane 19 is a float glass, possibly as toughened safety glass ESG, partially toughened safety glass TVG or as laminated safety glass VSG. The thickness is about 4 mm. The second pane 20 is a float glass and has a thickness of about 4 mm.

The base body and the screening wall are made of styrene-acrylonitrile (SAN), which is opaque and has any color, preferably black, gray, white or brown. The distance from the plane of the glazing interior surface 8 to the upper end of the bus bar 22 is about 9 mm. Butyl was used as the sealant 4 and silicone was used as the outer seal 6 .

The busbar 22 is completely covered by the visual protection wall 12 of the spacer when viewed from the outside within a specific viewing angle range. The spacer saves one production step, since the application of an opaque coating to one of the panes, which according to the in 1 is necessary, is no longer necessary. Another advantage is that the base body and the privacy screen are the same color, while as in 1 1, the opaque coating 23 and the spacer are typically of different colors for manufacturing reasons, thereby improving the aesthetic appearance of the insulating glazing.

The omission of the outer cover (screen printing) leads to a uniform appearance of the entire pane, as the reflection behavior of the pane is identical over the entire surface.

Figure 3a shows a representation of a spacer in cross section in the insulating glazing of 4 was used. Reference is made to the information on the spacer provided there.

Figure 3b shows a representation of a spacer in cross section, which is suitable for a triple insulating glass. The spacer comprises a base body (base body B), which has a first pane contact surface 7.1 and a second pane contact surface 7.2 running parallel thereto, a first interior glazing surface 8.1, a second interior glazing surface 8.2, a first inner side surface 7.3, a second inner side surface 7.4 and an outer surface 9 . The two inner side faces extend between and parallel to the two pane contact faces and together with the two glazing interior faces and the outer face form a groove 15 for receiving a pane. A screening wall 12 is arranged on the first inner side surface 7.3 at the edge of the first inner side surface 7.3. A second screen wall 12 is arranged on the second inner side surface 7.4 at the edge of the second inner side surface 7.4.

The base body is formed in one piece with the two screening walls 12 and can be produced in one step by an extrusion process. The base body and the screening wall are made of the same material, such as SAN, which is opaque and has any color, preferably black, grey, white or brown.

4 shows a representation of an insulating glazing according to the invention in cross section. In principle, the insulating glazing corresponds to the in 2 insulating glazing shown, except that in 4 shown spacer the spacer 5 has a screen wall 12 on the glazing interior surface 8, which is arranged at the edge to the second pane contact surface 7.2. In this way, the screen wall 12 is in close proximity to the busbar 22 attached to the second pane 20.

Electrical connection elements and contact elements are not shown for reasons of clarity.

The spacer corresponds to the in 2 and 3a shown spacer, except that it is in the arrangement according to 4 compared to 2 was positioned in reverse. The information on the spacer in 2 and 3a apply accordingly. the to 2 The advantages mentioned in terms of saving a production step and improved aesthetic appearance of the insulating glazing also result from this variant. In addition, a further improved concealment of the bus bar can be seen, which is not visible from the outside even when viewed from a very oblique angle.

figure 5 shows a representation of a further insulating glazing according to the invention in cross section, which represents a triple insulating glass. There are two spacers according to here 2 or 3a used. The information on the spacer in 2 and 3a apply accordingly.

The insulating glazing comprises a first pane 19, a second pane 20 and a third pane 21, the third pane 21 (inner pane) being arranged between the first and second panes and parallel thereto. Both sides of the third pane are each partially provided with an electrically switchable and/or electrically conductive coating 1, such as an electrochromic coating, which is contacted by a bus bar 22, which was produced by screen printing with a silver paste and baking.

A first spacer 5 with the base body A is arranged circumferentially between the first and third panes. A second spacer with the base body A is arranged circumferentially between the second and third panes. The first pane contact surface of the first spacer is connected to the first pane via a sealant 4 . The second pane contact surface of the first spacer is connected to the third pane via a sealant 4 . The first pane contact surface of the second spacer is connected to the third pane via a sealant 4 . The second pane contact surface of the second spacer is connected to the second pane via a sealant 4 . Between the first and the third disc 19, 21 and the A first glazing interior 3.1 is formed between the glazing interior surface 8 of the first spacer and a second glazing interior 3.2 is formed between the second and third panes 20, 21 and the glazing interior surface of the second spacer. Furthermore, there is a first outer space between the panes 13.1 adjacent to the outer surface of the first spacer, in which an outer seal 6 is introduced, and a second outer space between the panes 13.2 adjacent to the outer surface of the second spacer, in which an outer seal 6 is introduced. Electrical connection elements and contact elements are not shown for reasons of clarity.

The first spacer has a privacy wall 12 on the interior glazing surface at the edge to the second pane contact surface so that the privacy wall 12 is in close proximity to the bus bar 22 located on the side of the third pane 21 opposite the first pane. The second spacer has a privacy wall 12 on the interior glazing surface at the edge to the first pane contact surface so that this privacy wall 12 is in close proximity to the bus bar 22 located on the side of the third pane 21 opposite the second pane.

the for 4 mentioned benefits are also noted here. In the figure 5 For aesthetic reasons, the variant of the spacer shown also makes sense for an analogous embodiment in which, instead of both sides, only one side of the third pane is partially provided with an electrically switchable and/or electrically conductive coating 1, such as an electrochromic coating is contacted by a busbar 22.

6 shows a representation of a further insulating glazing according to the invention in cross section, which represents a triple insulating glass. The structure essentially corresponds to the structure of figure 5 . In contrast to figure 5 are here but the two electrically switchable and / or electrically conductive coatings 1 and the bus bars 22 connected thereto are arranged on the inside of the first pane 19 and on the inside of the second pane 20 .

Furthermore, the first spacer has a privacy screen 12 on the interior glazing surface at the edge of the first pane contact surface, so that the privacy screen 12 is in the immediate vicinity of the bus bar 22 that is arranged on the first pane 19 . Furthermore, the second spacer has a privacy screen 12 on the interior glazing surface at the edge of the second pane contact surface, so that this privacy screen 12 is in close proximity to the bus bar 22 that is arranged on the second pane 20 .

the for 4 mentioned benefits are also noted here. It may also be useful to apply an opaque outer coating as in 1 shown as 23 by means of screen printing on the first disc 19 to prevent the bus bar from being seen from the outside. The same applies to the inside side of disc 20. As far as in figure 5 As shown, the electrochromic coating is applied to the central disc 21, the screen printing can be applied to the inner or outer sides of the discs 19 or 20 as desired.

Figure 7a shows a perspective view of a further insulating glazing according to the invention in cross section, which represents a triple insulating glass. In this structure, a spacer is installed with a base body B which corresponds to that in Figure 3b spacer shown. The information given there applies accordingly.

The insulating glazing comprises a first pane 19, a second pane 20 and a third pane 21, the third pane 21 (inner pane) being arranged between the first and second panes 19, 20 and parallel thereto. The side of the third pane 21 opposite the first pane is partially provided with an electrically switchable and/or electrically conductive coating 1, such as an electrochromic coating, which is contacted by a bus bar 22.

The first pane contact surface 7.1 of the spacer is connected to the first pane 19 via a sealant 4. The second pane contact surface 7.2 of the spacer is connected to the second pane 20 via a sealant 4. The third disc 21 is received in the groove 15 of the spacer. The arrangement creates a first glazing interior 3.1 between the first and third panes and a second glazing interior 3.2 between the first and third panes. Furthermore, there is an outer space between the panes 13 adjacent to the outer surface 9 of the spacer, in which an outer seal is introduced. Electrical connection elements and contact elements are not shown for reasons of clarity, only the electrical connections 17 leading out of the insulating glass are indicated schematically.

The screening wall 12 on the first interior glazing surface 8.1 at the edge of the first inner side surface 7.3 of the spacer and the screening wall 12 on the second interior glazing surface 8.2 at the edge of the second inner side surface 7.4 of the spacer are close to the bus bar 22 and can largely cover it.

Figure 7b shows a perspective view of a further insulating glazing according to the invention in cross section, which represents a triple insulating glass. This structure is a variant of the structure according to FIG Figure 7a . The only difference is that the screens are not rectangular in shape, but have a shape that tapers from bottom to top. The side of the screening wall that is flush with the first or second inner side surface 7.3, 7.4 is flat, while the opposite side tapers conically upwards. This has advantages in terms of stability and the manufacture of the spacer from one piece. Furthermore, this can result in an even more attractive appearance.

Figure 8a shows a perspective view of a further insulating glazing according to the invention in cross section, which represents a triple insulating glass. This structure is a variant of the structure according to FIG Figure 7a . The difference is that the spacer is designed in two parts here with respect to the longitudinal direction. A separate spacer end piece 16 is provided for feeding in the wiring, which is additionally provided with openings in order to enable easier routing of the wiring.

Figure 8b shows a perspective view of a further insulating glazing according to the invention in cross section, which represents a triple insulating glass. This structure is a variant of the structure according to FIG Figure 7b . The difference is that the spacer here is designed in two parts with respect to the longitudinal direction. A separate spacer end piece 16 is provided for feeding in the wiring, which is additionally provided with openings in order to enable easier routing of the wiring.

Reference List

1

electrically conductive and/or electrically switchable coating

2

electrical contact element

3

glazing interior

3.1

first glazing interior

3.2

second glazing interior

4

sealant

5

spacers

6

outer sealing

7.1

first disc contact area

7.2

second disc contact surface

7.3

first inner face

7.4

second inner side surface

8th

glazing interior surface

8.1

first glazing interior surface

8.2

second glazing interior surface

9

outer surface

10

cavity

11

desiccant

12

privacy wall

13

outer space between the panes

13.1

first outer pane cavity

13.2

second outer pane cavity

14

cable or ribbon cable

15

groove

16

Spacer end piece

17

electrical connection lines

19

first disc

20

second disc

21

third disc

22

busbar

23

opaque coating

H

Height of privacy screen

b

wide privacy screen,

Claims (13)

1. Insulating glazing, comprising at least two panes and at least one spacer in which the at least two panes form, together with the spacer, at least one glazing interior, in which an element to be concealed, which is a bus bar (22), a connection line, and/or an electrical contact element, in particular a bus bar (22), is arranged on a pane, and at least one screen panel (12) of the spacer obscures the element to be concealed when viewed from the outside, at least from certain viewing angles, wherein the spacer comprises a main body,

   which is a main body A comprising a first pane contact surface (7.1), a second pane contact surface (7.2) extending parallel thereto, a glazing interior surface (8), and an outer surface (9), or

   which is a main body B comprising a first pane contact surface (7.1) and a second pane contact surface (7.2) extending parallel thereto, a first glazing interior surface (8.1), a second glazing interior surface (8.2), a first inner lateral surface (7.3), a second inner lateral surface (7.4), and an outer surface (9), wherein the two inner lateral surfaces extend between the two pane contact surfaces and parallel thereto and, together with the two glazing interior surfaces and the outer surface, form a groove (15) for receiving a pane,

   wherein the spacer has at least one screen panel (12) made of an opaque material arranged on the glazing interior surface (8) of the main body A or at least one screen panel (12) arranged on at least one of the two glazing interior surfaces (8.1, 8.2) of the main body B and extending parallel to the two pane contact surfaces (7.1, 7.2),

   wherein the at least one screen panel (12) is arranged in the edge region or at the edge toward a lateral surface of the spacer, which is in contact with the pane on which the element to be concealed, in particular a bus bar, is attached, wherein the lateral surface of the spacer is selected from the first pane contact surface, the second pane contact surface, the first inner lateral surface, or the second inner lateral surface.
2. Insulating glazing according to claim 1, characterized in that the at least one screen panel (12) has a height h in the range from 2 to 50 mm, preferably from 4 to 40 mm, particularly preferably 4 to 15 mm.
3. Insulating glazing according to claim 1 or 2, characterized in that the at least one screen panel (12) has, in cross-section, a rectangular basic shape, or the at least one screen panel (12) tapers, in cross-section, at least partially from bottom to top.
4. Insulating glazing according to any one of claims 1 through 3, characterized in that the at least one screen panel (12) is flush with the first or the second pane contact surface (7.1, 7.2) on the outwardly directed side, and/or the at least one screen panel (12) is flush with the first or the second inner lateral surface (7.3, 7.4) on the inwardly directed side.
5. Insulating glazing according to any one of claims 1 through 4, characterized in that the main body is formed in one piece with the at least one screen panel (12), or the main body and the at least one screen panel (12) form separate parts that are connected to one another.
6. Insulating glazing according to any one of claims 1 through 5, characterized in that the main body is made of metal or plastic, and/or the main body and the at least one screen panel (12) are made of the same material.
7. Insulating glazing according to any one of claims 1 through 6, comprising

   • a first pane (19) and a second pane (20), wherein an interior-side surface of the first pane or the second pane has, at least partially, an electrically switchable and/or electrically conductive coating (1) or an electrically switchable and/or electrically conductive functional element, as well as at least two bus bars (22) for contacting the coating (1) or the functional element,

   • the spacer with the main body A surrounding the first and second pane, wherein the first pane (19) is connected to the first pane contact surface (7.1) of the spacer directly or via a sealant (4), and the second pane (20) is connected to the second pane contact surface (7.2) of the spacer directly or via a sealant (4),

   • a glazing interior (3) formed between the glazing interior surface (8) of the spacer and the first and the second pane (19, 20),

   • an outer interpane space (13) adjacent the outer surface (9), in which an outer seal (6) is inserted,

   • and one or a plurality of electrical connection elements (14) for connecting to a power supply and one or a plurality of electrical contact elements (2) for the electrical connection of the bus bars (22) to the electrical connection elements (14),

   wherein at least one bus bar (22) is situated in the glazing interior (3), and when viewed from the outside, at least from certain viewing angles, the at least one screen panel (12) of the spacer obscures the view of the bus bar (22).
8. Insulating glazing according to any one of claims 1 through 6, comprising

   • a first pane (19), a second pane (20), and a third pane (21), wherein the third pane (21) is arranged between the first and second pane (19, 20) and parallel thereto,

   • wherein an interior-side surface of the first pane (19) or the second pane (20) or a surface of the third pane (21) has, at least partially, an electrically switchable and/or electrically conductive coating (1) or an electrically switchable and/or electrically conductive functional element as well as at least two bus bars (22) for contacting the coating (1) or the functional element,

   • the spacer with the main body A as a first spacer and a second spacer, wherein the second spacer is likewise a spacer with the main body A or a spacer that has a first pane contact surface, a second pane contact surface extending parallel thereto, a glazing interior surface, and an outer surface, wherein the spacer with the main body A surrounds the first and third pane, wherein the first pane (19) is connected to the first pane contact surface (7.1) of the spacer directly or via a sealant (4), and the third pane (21) is connected to the second pane contact surface (7.2) of the spacer directly or via a sealant (4), and the second spacer surrounds the second and third pane, wherein the second pane (19) is connected to the second pane contact surface of the spacer directly or via a sealant (4), and the third pane (21) is connected to the first pane contact surface of the spacer directly or via a sealant (4), or
   the spacer with the main body B surrounding the first and second pane, wherein the first pane (19) is connected to the first pane contact surface (7.1) of the spacer directly or via a sealant (4), and the second pane (20) is connected to the second pane contact surface (7.2) of the spacer directly or via a sealant (4), and the third pane (21) is received in the groove (15) of the spacer,

   • a first glazing interior (3.1) formed between the first and the third pane (19, 21) and the glazing interior surface (8) of the first spacer with the main body A, and a second glazing interior (3.2) formed between the second and the third pane (20, 21) and the glazing interior surface of the second spacer, or
   a first glazing interior (3.1) formed between the first and the third pane (19, 21) and the first glazing interior surface (8.1) of the spacer with the main body B, and a second glazing interior (3.2) formed between the second and the third pane (20, 21) and the second glazing interior surface (8.2) of the spacer with the main body B,

   • a first outer interpane space (13.1) adjacent the outer surface (8) of the first spacer with the main body A, in which an outer seal (6) is inserted, and a second outer interpane space (13.2) adjacent the outer surface of the second spacer, in which an outer seal (6) is inserted, or
   an outer interpane space (13) adjacent the outer surface (8) of the spacer with the main body B, in which an outer seal (6) is inserted,

   • and one or a plurality of electrical connection elements (14) for connecting to a power supply and one or a plurality of electrical contact elements (2) for the electrical connection of the bus bars (22) to the electrical connection elements (14),

   wherein at least one bus bar (22) is situated in the first or second glazing interior (3.1, 3.2), and when viewed from the outside, at least from certain viewing angles, the at least one screen panel (12) of the spacer obscures the view of the bus bar (22).
9. Insulating glazing according to claim 7 or claim 8, characterized in that the electrically switchable and/or electrically conductive coating (1) or the electrically switchable and/or electrically conductive functional element is an electrochromic coating, a transparent, electrically conductive coating, or one or a plurality of photovoltaic elements.
10. Insulating glazing according to any one of claims 1 through 9, characterized in that at least one of the first pane (19), the second pane (20), and, if present, the third pane (21) is a float glass pane, a composite pane, a textured glass, or a colored or satin glass.
11. Insulating glazing according to any one of claims 1 through 10, characterized in that the at least one screen panel is arranged in the edge region or at the edge toward a lateral surface of the spacer, which is in contact with the pane on which the element to be concealed, in particular a bus bar, is attached such that the element to be concealed, in particular the bus bar, is arranged between the at least one screen panel and the pane on which the element to be concealed is attached, wherein the element to be concealed, in particular the bus bar, and the at least one screen panel are preferably spaced apart from one another.
12. Insulating glazing according to any one of claims 1 through 11, characterized in that the at least one screen panel is arranged in the edge region or at the edge toward a lateral surface of the spacer, which is in contact with the pane on which the element to be concealed, in particular a bus bar, is attached, wherein the element to be concealed, in particular the bus bar, and the at least one screen panel are spaced apart from one another, as a result of which a gap is formed between the element to be concealed, in particular the bus bar, and the at least one screen panel, which preferably has a gap width in the range from 1.4 mm to 3 mm.
13. Use of an insulating glazing according to any one of claims 1 through 12 as building interior glazing, building exterior glazing, and/or façade glazing.

Images