EP3315684A1 - Light guiding building fitting device and building window device - Google Patents

Abstract

The invention relates to a light-guiding building installation device (3), in particular for a building window device (1), to a wall and / or roof structure (5) and / or a roof skin (6) of a building at least partially sweeping arrangement of the building. It is provided that the building installation device (3) has at least one light guide element (12) having a light-transmitting light entrance surface (13) arranged on the outside of the building installation device (3), a translucent light exit surface (14) arranged on the inside, and at least one reflective and curved one and / or kinked light concentrator (16), which reflects light incident through the light entry surface (13) in the direction of the light exit surface (14), so that the reflected light at least partially through the light exit surface (14) from the building installation device (3) into the light entry surface (13) emerges in the opposite direction. The invention further relates to a building window device (1).

Description

The invention relates to a light-guiding building installation device, in particular for a building window device, to a wall and / or roof structure and / or a roof skin of a building at least partially sweeping arrangement of the building. The invention further relates to a building window device.

The building installation device is provided, for example, for arrangement on the building, in particular a roof of the building, in particular a residential building. It may be part of the building window device, in which case it forms a structural unit together with a building window, in particular skylight, or at least is associated with the building window. The building installation device is arranged on the building such that it passes through the wall and / or roof construction and / or the roof skin, preferably both, in each case, in particular completely engages. The building installation device can be configured as a roof installation device. Analogously, the building window device can be present as a roof window device. Hereinafter, reference is made to such an embodiment. However, the embodiments are always generally transferable to the building installation device and / or the building window device.

The roof construction forms the load-bearing part of the roof, while the roof membrane seals the roof. The roof skin is arranged and / or fixed on the roof construction, insofar the roof construction is designed to support the roof skin. The roof skin can basically be configured as desired. It is for example in the form of a roof covering or a roof seal. In the former case, it consists of individual components, also referred to as roofing elements, which are arranged such that moisture is discharged through them due to a gravitational influence. The components from which the roofing is made, for example, as roof tiles, roof tiles or the like. On the other hand, the roof seal is preferably completely watertight and is present, for example, in the form of watertightly connected roof sealing elements. The roof sealing elements may be in the form of roofing membranes, for example bitumen roofing membranes or metal elements.

The wall construction or the roof defines an interior, in particular of the building, from an external environment. In the case of the roof, the roof skin is preferably on the side facing away from the interior or the outside environment facing side of the roof structure. The building installation device can now be arranged in such a way in the wall construction and / or the roof, that over it a connection between the external environment and the interior is made. The building installation device serves to supply light from the outside environment into the interior. With the aid of the building installation device, light, namely light originating from the outside environment, is to be passed through the wall construction and / or the roof, namely into the interior. In this respect, the building installation device is in the form of a light-guiding building installation device or is designed for guiding light.

It is an object of the invention to propose a building installation device, which has advantages over known building installation facilities, in particular allows a particularly efficient light management.

This is achieved according to the invention with a building installation device having the features of claim 1. It is provided that the building installation device has at least one light guide element, which has an outside arranged on the building installation device, translucent light entrance surface, an inside arranged, translucent light exit surface and at least one reflective and curved and / or kinked Lichtkonzentrator, the light incident through the light incident surface in the direction of light the light exit surface reflects, so that the reflected light at least partially exits through the light exit surface of the building installation device in the direction away from the light entrance surface direction.

The light guide element serves to selectively guide light from the outside environment in the direction of the interior. For this purpose, the light guide element has the light entry surface and the light exit surface. By the light entry surface, which is arranged on the outside of the building installation device, ie on the outside of the environment facing side of the building installation device, light can enter the building installation device. This light can on the opposite side of the light entry surface of the light guide element or the building installation device from the light exit surface emerge again. The light exit surface lies on the side facing the interior of the light guide element or the building installation device.

The light entry surface and the light exit surface can basically be configured as desired. For example, they are each completely in an imaginary plane, wherein the two planes are particularly preferably spaced apart from each other. In order to improve the passage of light through the light guide element or the building installation device, the light guide element has the light concentrator. This is arranged between the light entry surface and the light exit surface and consists of a reflective material. For example, the light concentrator, in particular for visible light, has a reflectance of at least 80%, at least 85%, at least 90% or at least 95%. The light concentrator is at least partially curved and / or kinked, namely such that it focuses light incident on it or concentrated and deflects in the direction of the light exit surface or reflected. In the case of the kinked embodiment, at least one buckling is provided, but preferably there are several bends. A combination of curvature and at least one buckling can be realized.

The light concentrator extends in cross-section, for example, substantially along an imaginary line connecting the light entry surface with the light exit surface. This line is particularly preferably on the light entry surface, the light exit surface or both perpendicular, especially if they are in the manner described above completely in each case in the imaginary plane. For example, the light concentrator has an extension in the direction of the imaginary line, which, based on the distance of the light exit surface from the light entry surface along this straight line at least 50%, at least 60%, at least 70%, at least 75%, at least 80%, at least 90% or at least 95%. It can also be provided that the light concentrator extends in cross-section from the light entry surface to the light exit surface.

It is particularly preferably provided that the light entry surface, viewed at least in cross section, has different dimensions than the light exit surface. For example, the light entry surface is seen in cross section larger than the light exit surface. This means that a comparatively large amount of light can enter through the light entry surface, which is then supplied to the light exit surface by means of the light concentrator. At the Light exit surface is insofar the light intensity of the light exiting there greater than the light intensity of the light entering through the light entrance surface. Accordingly, through the use of the building installation device, a comparatively small wall surface bounding the interior space and surrounding the building installation device is lost, in particular in comparison with a conventional building window or roof window, in which the light entry area usually corresponds to the light exit area.

Within the scope of a further embodiment of the invention, it is provided that the light guide element is weatherproof closed and / or covered on the outside and / or that the light guide element is closed on the inside and / or covered by light. Of course, the building installation device is weatherproof, thus preventing the entry of environmental influences from the outside into the interior. In particular, the building installation device prevents the entry of moisture into the interior. For this purpose, the light guide element, for example, outside weatherproof closed, so that the moisture can not enter the light guide element. The closing can be done by means of a divergence element, which will be discussed in more detail below. Additionally or alternatively, the light guide element is weatherproof covered, for example with a transparent cover through which light can pass and enter through the light entry surface in the light guide element.

In addition or as an alternative, it may of course be provided that the light guide element is closed on the inside so as to be translucent and / or covered. For this purpose, for example, on the inside of the light guide element there may be a light-transmitting light-conducting element or a light-transmitting light-scattering element. These will be discussed in more detail below. In the case of the translucently sealed light guide element, the light exit surface is preferably present on the light guide element or the light scattering element. It is particularly preferably provided that the light-permeable closing of the light guide element fluid-tight, in particular airtight, takes place, so that a flow exchange between the interior and the light passage space of the light guide element is prevented.

A further embodiment of the invention provides that the light concentrator seen in cross-section at least partially, in particular continuously, parabolic and / or with a changing curvature, in particular a continuously changing curvature is curved. The light concentrator has seen in cross-section a first end and a first end opposite the second end, both ends each having a free end form the light concentrator. Between the two ends of the light concentrator seen in cross section extends at least partially curved. However, the light concentrator is preferably continuously curved, that is to say that it has a curvature which differs from zero, starting from the first end up to the second end.

Particularly preferably, at least the sign of the curvature is constant, so that therefore the light concentrator is designed to be continuous concave or convex. The curvature of the concentrator is preferably parabolic, in particular continuous. In this case, it can have a changing curvature, that is to say a curvature which is not constant at least in regions. However, the curvature particularly preferably changes continuously, namely starting from the first end to the second end. The light concentrator is particularly preferably continuously curved continuously, so it has no discontinuities, for example in the form of a bend, a jump or the like on.

It can be provided that the light concentrator is curved and / or bent such that its focal point lies in the light exit surface, in particular in an edge of the light exit surface. The light concentrator reflects light that occurs in the direction of its focal point. The curvature and / or buckling of the light concentrator can now be realized so that the focal point lies in the light exit surface. By means of such an embodiment, the light entering through the light entry surface and impinging on the light concentrator is completely reflected in the direction of the light exit surface, so that it can enter through this into the interior.

However, it can also be provided that the light concentrator has a plurality of focal points, but at least no single focal point. With such a configuration, a concentrated light spot and the associated heat load can be avoided. Irrespective of the configuration of the light concentrator, the heat arising therefrom is preferably dissipated, for example by heat conduction. For this purpose, the light concentrator consists for example of a good heat-conducting material, in particular of aluminum. Additionally or alternatively, the light concentrator has a high degree of reflection. For this purpose, its surface is, for example, bare and / or polished.

A further preferred embodiment of the invention provides that, as seen in cross-section, the light concentrator at least partially delimits a light passage space extending from the light entry surface to the light exit surface. The light passage space is seen in cross-section between the light entry surface and the light exit surface before or includes these each with a. The light entry surface and the light exit surface limit the light passage space so far on opposite sides and are hereby spaced from each other. At least one further side of the light passage space is delimited by the light concentrator at least partially, preferably completely. In this case, the light concentrator preferably extends in the above-described manner from the light entry surface to the light exit surface. On its side facing the light passage space, the light concentrator is concavely curved, that is to say has a curvature directed away from the light passage space and / or a corresponding projection in cross section.

A development of the invention provides that the light passage space in cross-section is at least partially limited by a reflective, the light concentrator opposite another light concentrator or the light concentrator opposite wall. In addition to the light concentrator, it is thus possible to provide the further light concentrator, which is arranged opposite the light concentrator. The further light concentrator is preferably configured analogously to the light concentrator, so that reference is made in this respect to the corresponding explanations. As an alternative to the further light concentrator, the wall may be provided which has a lower degree of reflection than the light concentrator.

The further light concentrator is preferably curved in the opposite direction and / or kinked as the light concentrator, thus also has a curvature and / or a projection which faces away from the light passage space. The use of the further light concentrator further increases the intensity of the light exiting through the light exit surface because a larger part of the light entering the light guide element through the light entry surface is deflected in the direction of the light exit surface.

A further embodiment of the invention provides that the further light concentrator or the wall is configured symmetrically with respect to the light concentrator with respect to a plane of symmetry extending through the light passage space. In that regard, the light guide element is constructed symmetrically. The plane of symmetry intersects, for example, the light entry surface and / or the light exit surface, in particular, it is in each case perpendicular to the light entry surface and / or the light exit surface. In particular, the plane of symmetry intersects the light entry surface and the light exit surface in the middle, as viewed in cross section.

A further embodiment of the invention provides that the light concentrator and / or the further light concentrator or the wall each extend from the light entry surface to the light exit surface. On such a configuration has already been noted. The light passage space is seen in cross-section of the light entrance surface, the light exit surface and the light concentrator and the other light concentrator or the wall completely, especially uninterrupted bordered. With such an embodiment of the building installation device or the light guide element, a particularly strong concentration of the light entering through the light entry surface is achieved, so that only a small amount of light is lost due to losses.

A preferred further embodiment of the invention provides that the light entry surface is present on a translucent divergence element and / or the light exit surface on a translucent light guide element or a light-transmitting light scattering element. The divergence element serves to divide or split a light beam entering the light guide element into a plurality of light beams, for example by partial reflection and partial transmission of the light beam. Preferably, the plurality of light beams emanating from the light beam have the same light intensity or almost the same light intensity. The divergence element has, for example, a number of divergent plates which-seen in cross-section-are present between the light entry surface and the light exit surface. For example, the divergence plates are parallel to the plane of symmetry.

The divergence element is in the form of a honeycomb plate, for example, which consists of a transparent material or an at least partially transparent material. By dividing the light beam into a plurality of light beams, the light intensity and / or the divergence of the light beams at the light exit surface can be further improved, because despite any losses occurring in the divergence element, a larger amount of light is deflected by means of the light concentrator and / or the further light concentrator in the direction of the light exit surface and / or greater dispersion occurs. The divergence element is present at the light entry surface or conversely the light entry surface at the divergence element. Preferably, the light entry surface on a side facing away from the light passage space of the divergence element is present at this.

In addition or as an alternative to the divergence element, the light scattering element may be present. At this the light exit surface is formed. Preferably, the light exit surface is at one formed facing away from the light passage space side of the light scattering element. The light scattering element serves insofar as the scattering of the light emerging through the light exit surface. By means of the light scattering element, an expansion and / or a homogenization of the light emerging through the light exit surface is / is achieved. Alternatively or additionally, a scattering glass may be present or used as a light scattering element.

Additionally or alternatively, the light exit surface may be present on the light guide. The light guide allows a largely unhindered passage of light. For example, for this purpose, the light-guiding element has a transmittance which corresponds to a transmittance of window glass. For example, the light-guiding element is in the form of a glass pane, in particular a flat glass pane. The light-guiding element serves insofar as the light-permeable closing of the light-guiding element in particular.

A further embodiment of the invention provides that the divergence element and / or light guide element and / or the light scattering element at least partially engage in the light passage space, in particular completely present in it. This applies in particular to the divergence element, which preferably rests against the light concentrator and / or the further light concentrator, so that it is particularly preferably enclosed on opposite sides by the light concentrator and / or the further light concentrator. The divergence element preferably terminates flush with the light entry surface on its side facing away from the light passage space. The light entry surface is so far in the form of a surface facing away from the light passage space of the divergence element.

In summary, the divergence element should preferably be arranged completely in the light passage space. Of course, however, an arrangement of the divergence element can be realized in which this protrudes at least partially from the light passage space. An analogous arrangement may be provided for the light scattering element. However, the light scattering element is particularly preferably arranged completely outside the light passage space, so that a surface of the light scattering element facing the light passage space coincides with the light exit surface.

A development of the invention provides that the divergence element is arranged on the side of the light entry surface facing the light passage space and / or the light guide element and / or the light scattering element on the side of the light exit surface facing away from the light passage space. This again illustrates the above statements, according to which the Divergence element is preferably arranged completely in the light passage space and the light guide or the light scattering element completely outside the light passage space. The surface of the divergence element facing away from the light passage space coincides with the light entry surface and the surface of the light guide element or the light scattering element facing the light passage space with the light exit surface.

A preferred further embodiment of the invention provides that the divergence element has a honeycomb body, in particular made of a transparent material. Under the honeycomb body is to be understood a body having a plurality of honeycombs, which are preferably open on both sides. Insofar, the honeycombs completely penetrate the honeycomb body in one direction. The honeycombs are preferably open on the side facing away from the light passage space and the side facing the light passage space, so that longitudinal central axes of the honeycombs extend at least approximately in the direction of an imaginary straight line connecting the light entry surface with the light exit surface.

Preferably, the longitudinal center axes of the honeycombs are each aligned parallel to a line perpendicular to the light entry surface and / or light exit surface. The honeycombs are preferably designed peripherally closed in the honeycomb body, ie, each have a continuously closed edge, namely preferably in a plane which is arranged parallel to the light entry surface and / or the light exit surface.

With such a configuration of the honeycomb body or of the honeycombs, the light entering through the light entry surface can be reflected by the edges of the honeycombs. Preferably, the honeycomb body is made of a transparent material, so that each light beam partially reflects from the edge and partially passes through it, so that a plurality of light rays arise, which ultimately impinge on the light concentrator and / or the other light concentrator. The honeycomb body may be closed on its side facing the light passage space and / or its side facing away from the passage of light, for example by means of (in each case) a cover plate which is assigned to the divergence element in addition to the honeycomb body.

A further preferred embodiment of the invention provides that the light scattering element comprises a nonwoven material, a powder material, a frosted and / or surface-structured light passage element, a light-scattering film and / or an airgel, in particular a translucent or transparent and / or heat-insulating airgel. Basically, the light scattering element be designed as desired, as long as it has a light-scattering effect. Preferably, the light scattering element is configured such that the entire light entering it or at least a majority of the light entering it exits from it on its opposite side. The light scattering element should thus have a high efficiency or low losses. For example, at least half of the light entering it exits it again, but preferably at least 60%, at least 70%, at least 75%, at least 80%, at least 90% or at least 95%.

The light scattering element has, for example, a nonwoven material, by means of which, for example, a nonwoven fabric, in particular a non-absorbent nonwoven fabric, is realized. A powder material can also be used to realize the light scattering element. For example, the powder material is applied to a transparent support. The frosted light passage element is made of a transparent material whose surface or surfaces is frosted / are. In principle, the light passage element can have any surface structure which is adapted to the desired effect of the light passage element. For example, the light passage element made of frosted or roughened glass or plastic. Of course, a light-scattering film can be used as a light scattering element. The light-scattering film is particularly preferably applied to a light-transmitting carrier element, for example a glass pane, in particular a flat glass pane. Additionally or alternatively, a light deflecting glass can be used.

A particularly preferred embodiment of the invention provides that the light guide is a wall passage element. The wall passage element passes through a wall which delimits the interior of the roof construction of the roof. The wall is thus arranged on the interior of the facing side of the roof structure at this or fixed thereto. In other words, the wall on the side facing away from the roof skin of the roof construction is present at this. While the roof skin demarcates the roof construction from the outside environment, the wall is provided for delimiting the roof structure from the interior.

The wall passage element passes through this wall from the direction of the roof structure in the direction of the interior. Particularly preferably, the wall penetrating element terminates flush with an inner side of the wall facing the inner space or projects through the wall into the inner space, that is to say over the wall. Of course, it can also be provided that the wall passage element only partially penetrates the wall. At a Such a configuration, it is particularly preferably provided that the light concentrator is completely on the side facing away from the interior of the wall, so the wall does not pass through or engages in it. The wall passage element serves to lead at least a part of the light which has entered the light guide element through the light entry surface into the interior and thus to a good illumination of the interior.

A further embodiment of the invention provides that the light-guiding element has at least one light-transmitting pane or two panes spaced apart from one another by means of a spacer. The disc is preferably designed as a glass pane. Likewise, the discs are preferably in the form of glass sheets. If, in the context of this description, only the disc is mentioned, the corresponding embodiments can always be applied to each of the discs. The pane is translucent and for this purpose preferably has at least the transmittance of a glass pane.

It can be provided that the light-guiding element has only exactly one light-transmissive pane. Alternatively, a plurality of disks, in particular exactly two disks are provided, wherein these are spaced apart by means of the spacer. One of the discs is the light concentrator and the other facing the interior. The light exit surface is on the side facing the interior of the interior closest to the disc. In order to achieve an excellent thermal insulation effect, it can be provided that an intermediate space present between the panes is evacuated, that is to say in which there is a negative pressure relative to an air pressure in the outside environment or in the interior. Additionally or alternatively, a gas, in particular an insulating gas, for example a noble gas, may be present in the intermediate space. The spacer is preferably made of a material which is different from a material of the disc or the discs. For example, the material of the spacer has a lower coefficient of thermal conductivity than the material of the disc. The spacer is so far as a thermal insulation element. The spacer may additionally or alternatively comprise a water adsorption and / or absorbent or at least have a receptacle for such.

A particularly preferred further embodiment of the invention provides that the building installation device is associated with a roller blind for setting an effective light passage surface, wherein the roller blind is arranged outside the light guide element or within the light guide element on the part of the light entry surface or the light exit surface. The blind serves to set the desired light passage area, in other words, the setting of the desired amount of light that passes through the light guide element from the outside environment into the interior. In other words, the roller blind is provided for sun protection or for darkening. Under the shade is in particular an opaque element or an element with a lower light transmission to understand as the light guide element, which can be arranged in different positions. For example, the roller blind is rolled up or folded in a position, so that a larger first light passage area is present. In a second position, the blind is at least partially or completely unrolled or unfolded, so that a smaller second light passage area is set.

The blind can basically be arranged arbitrarily. For example, it is outside of the light guide element, namely on the side of the light entry surface or the light exit surface. In the former case, the blind is arranged in the outside environment and in the latter case in the interior. Preferably, however, the roller blind is arranged in the light guide element, so that it is protected from influences from the outside environment or the interior. If the roller blind is present in the light guide element, it is preferably arranged adjacent to the light entry surface, for example it adjoins it directly.

In other words, the roller blind is arranged closer to the light entry surface than to the light exit surface. Conversely, however, it can also be provided that the roller blind is arranged closer to the light exit surface than to the light entry surface, in particular adjacent to the light exit surface or directly adjacent to the light exit surface. For example, in this case, the roller blind between the two by means of the spacer spaced-apart discs of the light guide is arranged.

A further particularly preferred embodiment of the invention provides that the roller blind is present in the light-guiding element. This has already been pointed out. For example, the roller blind between the two discs of the light guide is arranged displaceably. As a result, a particularly good protection of the blind is realized from environmental influences.

A further preferred embodiment of the invention provides that the light passage space is divided into a plurality of subspaces by means of at least one light-permeable separating element. The light-permeable separating element is present, for example, in the form of a translucent pane, in particular a glass pane. Other materials, such as plastic, in particular Plexiglas, can be used for the separating element. The division of the light passage space in the plurality of subspaces has the advantage that a better thermal insulation of the light guide element is realized. For this purpose, the translucent separating element separates the light passage space into a plurality of subspaces, wherein one of the subspaces faces the light entry surface and another of the subspaces faces the light exit surface. For example, the separating element is arranged parallel to the light entry surface and / or the light exit surface. Preferably, the separating element passes through the entire light guide element seen in cross-section, thus separating the subspaces at least substantially or even completely fluidically from each other. In the former case, a pressure compensation opening may be formed in the separating element.

Within the scope of a further embodiment of the invention, it may be provided that the separating element consists of safety glass, in particular laminated glass or single-pane safety glass, which is present in particular as partially tempered safety glass. Due to the design of the separating element made of safety glass, damage to the separating element and a concomitant reduction in light transmittance are avoided on the one hand. Such damage can occur, for example, due to vibration and / or strong temperature differences. Should damage nevertheless occur, the use of the safety glass, in spite of the damage, will continue to ensure high light transmission of the separating element.

The safety glass is, for example, in the form of laminated glass or single-pane safety glass. Particularly preferably, the safety glass is partially prestressed, so it is provided in the light guide element with a bias before assembly so that it breaks when the damage occurs along a defined predetermined breaking line. The predetermined breaking line is arranged in particular in such a way that it does not or only slightly impair the light transmission of the light guide element even when the damage occurs.

A development of the invention provides that the light passage space is divided by means of several separating elements with different elemental strengths in the several subspaces. The plurality of separating elements are preferably arranged at a distance from one another in parallel and, for their part, are particularly preferably parallel to the light entry surface and / or light exit surface. The use of the plurality of separators, which also have the different element thicknesses, allows for excellent sound attenuation, for example, from external noise and / or rainfall noise generated by the Impact of raindrops on the building installation device or the light guide element caused. Under the element thickness is the material thickness of the separating elements to understand, so in particular a glass thickness or glass thickness. For example, the separating elements have significantly different element thicknesses from each other. For example, the factor between element thicknesses of the different separating elements is at least 1.5, at least 2, at least 3 or at least 4. For example, the separating elements have the following element thicknesses: 2 mm, 3 mm, 4 mm, 6 mm and / or 8 mm.

A particularly preferred embodiment of the invention provides that the separating elements have different distances from each other. With such a configuration, it is particularly easy to realize partial spaces with different volume contents. This has the advantage of a high soundproofing effect. Of course, the different volume contents can also be realized with separating elements, which have the same distance from each other. This in particular due to the course of the light concentrator, which is usually curved and / or kinked.

Within the scope of a further embodiment of the invention, it is provided that the separating element or at least one of the separating elements has an airgel or consists of airgel. The use of the airgel for the separator or one of the separators has the advantage of combining good thermal insulation with excellent soundproofing properties and simultaneous light scattering. The latter causes a uniform distribution of light in the interior. The airgel may, for example, be applied to a carrier material, for example a transparent carrier plate. However, the airgel can also be used without such a carrier element. As a result, in particular the excellent soundproofing effect of the airgel is exploited.

A development of the invention provides that the light concentrator and / or the further light concentrator each composed of several concentrator parts, which are spaced from each other by the at least one separating element. In other words, the light concentrator or the further light concentrator are separated from the at least one separating element (respectively) into a plurality of concentrator parts. The concentrator parts abut each other on opposite sides of the separating element and are in this way spaced apart from the separating element.

The splitting of the light concentrator or of the further light concentrator into the plurality of concentrator parts is preferably provided such that they continue to have the desired curvature. This may in particular be the case even if the curvature is continuous and / or changes continuously. In this case, the curvature of the light concentrator is an imaginary curvature to which the curvature of the individual concentrator parts is adapted. The curvature of the concentrator thus corresponds to the imaginary curvature at this point, so that no discontinuity in the course of the light concentrator or the other light concentrator is formed by the interruption of the light concentrator or the other light concentrator by the at least one separator.

A development of the invention provides that at least one of the concentrator parts is elastically connected to the separating element. In order to avoid stresses within the light guide element, the concentrator parts are not rigidly connected to the separating element. Rather, an elastic connection, in particular an elastic attachment, is provided.

A further embodiment of the invention provides that the light passage space and / or at least one or all of the subspaces is or are gastight relative to an external environment and / or an interior space. The outdoor environment is an area outside the building and outside the building. The interior corresponds to a limited space of the building and the building installation device. By means of the gas-tight design of the light passage space or the subspace or subspaces, a particularly good heat insulating effect and / or sound insulation effect of the building installation device can be achieved. Additionally or alternatively, penetration of moisture is prevented, so that the occurrence of moisture-related damage is effectively prevented.

A further preferred embodiment of the invention provides that at least one of the subspaces has a pressure compensation element or is fluidically connected to a pressure equalization chamber. This is the case in particular in the case of the gas-tight design of the light passage space and / or of the subspace. Due to different temperatures, different pressures can be set in the subspace. This in turn leads to a mechanical load on the light guide element, in particular of the separating element delimiting the subspace. For this reason, the pressure compensation element or the pressure compensation chamber is provided, with which the subspace is fluidically connected.

The pressure compensation element is, for example, a compressible element, which is compressed at an increase in pressure in the subspace and increases again in a pressure reduction, so that the pressure in the subspace always lies within a certain pressure range or even remains at least approximately constant. The pressure compensation element may be an intrinsically elastic element and in particular consist of a flexible material. Of course, it may also have at least one spring or the like, which is compressed in the pressure increase and relaxed at a pressure reduction. Alternatively or in addition to the pressure compensation element, the pressure equalization space can be provided. This is preferably outside of the light guide element and has a sufficiently large volume of fluid in order to absorb air flowing out of the subspace or, conversely, to supply air to the subspace. It is particularly preferably provided that the pressure compensation element is arranged in the pressure equalization chamber, wherein the pressure equalization chamber is fluidically connected to the subspace.

In a further embodiment of the invention it can be provided that at least two of the subspaces for pressure equalization are fluidically connected to one another, in particular by means of a capillary tube. The two subspaces are, for example, immediately adjacent subspaces, ie are separated from one another by the separating element or one of the separating elements. In order to avoid excessive pressure differences between the subspaces, which would mechanically load the separating element, a pressure equalization should be established between the subspaces. For this purpose, they are fluidically connected to each other, namely by means of a fluid line, for example by means of a tube. Alternatively, the pressure equalization can be realized via a pressure compensation opening formed in the separating element. In this case, the subspaces separated from one another by the separating element are fluidly connected to one another via the at least one pressure equalization opening.

Particularly preferably, the capillary tube serves to equalize the pressure. By the capillary tube is meant, for example, a tube whose longitudinal extent is significantly greater than its cross-sectional dimensions. For example, the capillary tube has a diameter of at most 0.25 mm, at most 0.5 mm, at most 0.75 mm or at most 1 mm. If there are more than two subspaces, then preferably all of the subspaces are fluidically connected to one another, namely in each case two of the subspaces, in particular in each case by means of a capillary tube. This means that each immediately adjacent subspaces are fluidically connected to each other. Accordingly, spaced apart spaces are only indirectly with each other connected, namely on an intermediate of the subspaces. It can be provided that at least one of the subspaces is in flow communication with the outside environment via another capillary tube. The further capillary tube preferably has smaller cross-sectional dimensions or a smaller flow cross-section than the capillary tube. Of course, an embodiment of the building installation device can be realized in which only the at least one further capillary tube, but no capillary tube is present.

A further embodiment of the invention provides that a water adsorption and absorption device is arranged in the light passage space and / or at least one or each of the subspaces. This device is used to absorb moisture in order to avoid a moisture-related reduction in the light transmission of the light guide element, which can occur for example by fogging. For example, the device is in the form of a molecular sieve which is a desiccant. In addition, a seal can be realized by means of butyl and / or polysulfide, one serves as a primary barrier and the other as a secondary barrier.

A further preferred embodiment of the invention provides that the light concentrator and / or the further light concentrator have a metal coating. The metal coating is used in particular for a gas-tight configuration of the light concentrator or of the further light concentrator. The metal coating realizes a diffusion-proof design so that the ingress of moisture is reliably prevented.

A further embodiment of the invention provides a light-guiding element which is designed for deflecting light beams in the direction of the light concentrator and / or the further light concentrator such that they are at a smaller first light incidence angle in the direction of the light entry surface and at a larger second light incidence angle in the direction of the light exit surface be reflected. By means of the light-guiding element, therefore, only light is deflected in the direction of the light exit surface, which enters the light guide element at a certain angle of incidence. The angle of incidence is preferably an angle between a surface normal perpendicular to the light entry surface and a light beam.

In the case of a conventional roof pitch, in this respect, for example, a smaller light incidence angle is present at noon than in the morning and / or in the evening. With the described embodiment of the light-guiding element, therefore, light is reflected in particular in the direction of the light exit surface, when less light enters the light guide element through the light entry surface. If, in contrast, a large amount of light enters the light guide element through the light entry surface anyway, for example at noon, excessive warming of the interior is to be prevented. This is realized by the back reflection of the light rays in the direction of the light entry surface. The light therefore at least partially does not enter the interior through the light exit surface. As a result, the heat insulating effect of the light guide element or a heat protection, especially in summer, improved.

Particularly preferably, the light-guiding element is adjustable so that the first light incidence angle and the second light incidence angle are variable. For example, in a first setting of the light-guiding element, a larger part of the light is reflected in the direction of the light exit surface than in a second setting. The setting of the light-guiding element takes place by means of an actuator, in particular an electrical actuator. However, a thermal actuator may also be provided, which makes the adjustment of the light-guiding element as a function of a temperature, in particular a temperature present in the building installation device. Additionally or alternatively, the adjustment can be made as a function of a season and / or a time and / or a light intensity.

A further embodiment of the invention provides that the light-guiding element is present as a structured glass pane or as awning having louvers. The structured glass pane is understood as meaning, for example, a so-called laser-cut panel, that is to say a glass pane structured by means of laser beams at least on one side, preferably on the outside. Of course, such a structured glass pane can also be present on the inside, for example as a light-conducting element or as part of it, for example in the form of the transparent pane. As an alternative to the configuration as a glass pane, the light-guiding element can also be present as an awning, which has lamellae, in particular reflective lamellae.

A preferred further embodiment of the invention provides that there is a reflector which is at a distance from the light exit surface and deflects light beams emerging through the light exit surface onto a projection surface which encloses the light exit surface in section. The reflector is arranged on the side facing away from the light guide member of the light exit surface and spaced from the light exit surface. He is so far in the interior. Preferably, the reflector engages over the light exit surface seen from the interior, so that for a person staying in the interior average person, the light exit surface is not directly visible, but is covered by the reflector.

The reflector is used for deflecting the light rays emerging through the light exit surface, namely such that they are deflected in the direction of the wall surrounding the light exit surface and impinge thereon. The wall in this case forms the projection surface, which encloses the light exit surface in the section, preferably completely encompasses. With the aid of the reflector, only indirect illumination of the interior is realized and, as a result, a glare effect is reduced or even completely prevented by the light entering the interior through the light guide element in a concentrated manner.

It may be provided independently of this that, spaced from the light exit surface, a further light-transmitting light-conducting element and / or a further light-transmitting light-scattering element is arranged. With regard to the further light-guiding element and the further light-scattering element, reference is made to the statements relating to the light-guiding element and the light-scattering element. It can be provided, for example, that the further light-guiding element and / or the further light-scattering element is arranged between the light exit surface and the reflector. It can also be provided that the reflector at least partially or completely surrounds the light-guiding element or the light-scattering element. In such an embodiment, central light rays are guided through the light guide element or the light scattering element, whereas edge light rays are reflected by the reflector.

A preferred embodiment of the invention provides that on the side facing away from the light passage space of the light concentrator a lighting device comprising at least one electric lamp and / or a ventilation device and / or an insulation is arranged. Due to the curvature of the light concentrator falls on the side facing away from the light passage space space, which can be used elsewhere, for example, to arrange the illumination device and / or the ventilation device. The illumination device preferably serves to illuminate the interior, that is to say it is arranged on the inside, that is to say on the side of the light guidance element which faces away from the light entry surface. The lighting device is so far arranged such that the light emitted by it radiates in the same direction as the light emerging from the light exit surface, at least in the interior is discharged into it. The lighting device has the at least one electric light, which in turn has an electrically operated light source.

The lighting device may additionally or alternatively be designed such that it emits light into the light passage space, in particular - at least in cross-section - in Direction of the light concentrator and / or the other light concentrator. The amount of light emitted by the illumination device, in particular into the light passage space, is preferably set such that the amount of light emerging from the light exit surface is independent of the amount of light entering through the light entry surface. The amount of light emitted by the illumination device is set correspondingly as a function of the amount of light entering through the light entry surface. Thus, a constant illumination or a constant illuminance is always achieved on the part of the light exit surface.

Additionally or alternatively, the ventilation device may be present. The ventilation device is used for ventilation of the interior and so far the realization of an air exchange between the outside environment and the interior. For example, fresh air is taken from the outside environment by means of the ventilation device and supplied to the interior as supply air and / or exhaust air taken from the interior and fed in the form of exhaust air of the external environment.

Additionally or alternatively, the insulation may be provided which, for example, at least partially or completely fills a cavity delimited by the light concentrator or the further light concentrator. For example, an entire side facing away from the light passage space of the light concentrator or of the further light concentrator is provided with such insulation, which rests directly against it or is attached. The insulation may consist of any insulating material, for example, mineral wool, a foam material, such as expanded polystyrene (EPS) or polyethylene is used. As a result, the insulating effect of the light guide element or the building installation device can be significantly improved.

A further embodiment of the invention provides that the illumination device is arranged on the inside of the building installation device. As already stated above, the illumination device is used to illuminate the interior. Accordingly, it is arranged on the inside or at least designed for emitting light in the direction of the interior. By way of example, a construction space in which the illumination device is arranged, on its side facing away from the light concentrator, is delimited by a surface which is arranged parallel or at least approximately parallel with respect to the plane of symmetry. In this case, the surface can be arranged such that it rests against the side of the light concentrator facing away from the light passage space. Due to the curvature of the light concentrator is thus - in cross section seen - created in the direction away from the light exit surface direction or the interior facing direction opening space in which readily the lighting device can be arranged.

A preferred embodiment of the invention provides that the illumination device has a ventilation channel, which is seen in cross section at least partially between the light concentrator, the other light concentrator or the wall on the one hand and a lining of a building window, in particular a roof window, on the other hand, in particular limited by these is. The ventilation duct is so far between the light guide element and the Gebäustefensterbeziehungsweise its inner lining. For example, it is seen in cross section by at least one element of the light guide element on the one hand and an element of the building window on the other hand limited.

For example, the ventilation channel of the light concentrator and a surface of the inner lining facing the light concentrator is limited or formed as seen in cross-section. Accordingly, no further air guide elements or air ducts must be provided. Alternatively, of course, the building installation device may have an outer wall which limits the ventilation duct, and to this extent be self-contained. The limitation of the ventilation duct by the light concentrator or the further light concentrator can also serve to control the temperature of the air guided in the ventilation duct. Due to the light deflected by means of the light concentrator or the losses occurring during the deflection, the light concentrator is heated and can accordingly also serve for heating the air.

Finally, it can be provided within the scope of a further embodiment of the invention that in addition to the ventilation duct another ventilation duct is present, wherein the ventilation duct and the further ventilation duct are designed as supply air duct and as exhaust duct, which are connected to each other heat transfer. The two ventilation channels can in principle be arranged arbitrarily to one another. For example, they are seen in cross-section fluidly separated from each other by a separating element, wherein the ventilation duct in the manner described above by the light concentrator, the further light concentrator and / or the wall on the one hand and the separating element on the other hand and the further ventilation duct of the separating element on the one hand and the Inner lining of the building window on the other hand limited. It can of course also be provided that the two ventilation channels are arranged side by side in plan view of the building installation device, so that each of the ventilation channels is arranged between the light concentrator, the further light concentrator or the wall on the one hand and the inner lining on the other hand or is limited by these.

The ventilation duct and the further ventilation duct are designed as supply air duct and exhaust air duct. Air from the outside environment can be supplied to the interior through the supply air duct, while air taken from the interior via the exhaust air duct is supplied to the outside environment. The supply air duct and the exhaust duct should be connected to each other to transmit heat. This means that the air present in the supply air duct is tempered, in particular heated, by means of the heat contained in the air present in the exhaust air duct. The ventilation device has so far about a heat recovery.

The invention further relates to a building window device with a building window, in particular roof window, and a light-guiding building installation device, in particular a building installation device according to the above, to a wall and / or roof construction and / or a roof of a building at least partially sweeping arrangement of the building. It is provided that the building installation device has at least one light guide element, which has an outside arranged on the building installation device, translucent light entrance surface, an inside arranged, translucent light exit surface and at least one reflective and curved and / or kinked Lichtkonzentrator, the light incident through the light incident surface in the direction of light the light exit surface reflects, so that the reflected light at least partially exits through the light exit surface of the building installation device in the direction away from the light entrance surface direction.

The advantages of such a configuration of the building installation device and the building window device has already been pointed out above. Both the building window device and the building installation device can be developed in accordance with the above explanations, so that reference is made to this extent.

The Gebäudefenstereinrichtung has in addition to the building installation device on the building window, in particular roof windows, which may have the above-mentioned inner lining. For example, the building window and the building installation device in the form of the building window device are designed for common arrangement on the roof and are fastened to one another in this respect. However, it may also be provided that the building installation device as an attachment for the building windows, so that the building window or the roof window is first arranged or fastened to the roof, and then the building installation device is attached to the building window or roof window. The mounting can be done during an initial installation of the building window or as part of a retrofitting with a time interval from the initial installation.

Figur 1

eine Querschnittdarstellung einer Gebäudefenstereinrichtung, welche eine Gebäudeeinbaueinrichtung sowie ein Gebäudefensteraufweist,

Figur 2

eine schematische Querschnittdarstellung eines Lichtführungselements der Gebäudeeinbaueinrichtung in einer ersten Ausführungsform,

Figur 3

eine schematische Darstellung des Lichtführungselements in einer zweiten Ausführungsform,

Figur 4

eine schematische Darstellung des Lichtführungselements in einer dritten Ausführungsform,

Figur 5

eine schematische Darstellung des Lichtführungselements in einer vierten Ausführungsform,

Figur 6

eine schematische Querschnittsdarstellung des Lichtführungselements mit einem vorgelagerten Reflektor, sowie

Figur 7

eine schematische Querschnittsdarstellung des Lichtführungselements.

The invention will be explained in more detail with reference to the embodiments illustrated in the drawings, without any limitation of the invention. Showing:

FIG. 1

a cross-sectional view of a building window device, which has a building installation device and a building window,

FIG. 2

a schematic cross-sectional view of a light guide element of the building installation device in a first embodiment,

FIG. 3

a schematic representation of the light guide element in a second embodiment,

FIG. 4

a schematic representation of the light guide element in a third embodiment,

FIG. 5

a schematic representation of the light guide element in a fourth embodiment,

FIG. 6

a schematic cross-sectional view of the light guide element with an upstream reflector, as well

FIG. 7

a schematic cross-sectional view of the light guide element.

The FIG. 1 shows a schematic cross-sectional view of a building window device 1, which is designed here purely by way of example as a roof window device. The building window device 1 has a building window 2, in particular a roof window, and a building installation device 3, in particular a roof installation device. The building window device 1 or the building window 2 and the building installation device 3 are each provided for arrangement on a building, in particular on a roof 4, which is merely indicated here. The roof 4 has a roof structure 5 and a roof skin 6, which is supported by the roof structure 5. The roof 4 separates an external environment 7 from an interior 8.

About the building window 2, however, an optical line of sight between the interior 8 and the outside environment 7 or vice versa is made. For this purpose, the building window 2 has a glazing 9, through which light from the outside environment 7 can enter the interior 8. Preferably, the building window 2 is to be opened. For this purpose, it has, for example, a frame attached to the roof 4 and a movable with respect to the frame sash. The glazing 9 is arranged on the casement, so together with this movable, in particular pivotable. For connection to a wall space 10 delimiting the interior 8, the building window 2 has an inner lining 11. About the inner lining 11, the window frame of the building window 2 is preferably optically tethered to the wall surface 10.

The building installation device 3 is seen in cross-section adjacent to the building window 2, in particular above the building window 2, respectively. Preferably, it connects directly to the building window 2. The building installation device 3 serves to guide light from the outside environment 7 into the interior 8. For this purpose, it has a light guide element 12 which has a light-transmitting light entry surface 13 arranged on the outside of the building installation device 3 and a light-transmitting surface 14 arranged on the inside. It should be noted that both the light entry surface 13 and the light exit surface 14 can each be present as a merely imaginary surface.

The light entry surface 13 and the light exit surface 14 define a light passage space 15 on opposite sides. The light entry surface 13 is arranged on the side of the light passage space 15 facing the outside environment 7 and the light exit surface 14 on the side of the light passage space 15 facing the interior 8. Preferably, the light entry surface 13 and the light exit surface 14 are each in an imaginary plane, these planes being parallel to each other. Alternatively, the planes may be angled against each other.

Seen in cross section, a light concentrator 16 extends between the light entry surface 13 and the light exit surface 14. This has a mirror surface 17 facing the light passage space 15, which is reflective. The mirror surface 17 is produced, for example, by means of a reflective coating of a main body of the light concentrator 16. Alternatively, you can Of course, the light concentrator 16 or its basic body itself be reflective.

The light concentrator 16 extends from the light entry surface 13 up to the light exit surface 14, thus connecting them in cross section. The light concentrator 16 opposite a further light concentrator 18 is arranged with a further mirror surface 19. The mirror surfaces 17 and 19 of the light concentrators 16 and 18 face each other, that is, in each case arranged on their side facing the light passage space 15 side. The light concentrator 18 also preferably connects the light entry surface 13 with the light exit surface 14.

The light concentrators 16 and 18 are basically preferably configured identically, but arranged in mirror image to each other. Accordingly, they are symmetrical to each other with respect to a plane passing through the light passage space 15 symmetry plane 20. The light concentrators 16 and 18 reflect light incident through the light entry surface 13 in the direction of the light exit surface 14, so that the reflected light at least partially exits the building installation device 3 through the light exit surface 14 in the direction away from the light entry surface 13.

In addition to the light guide element 12, the building installation device 3 is assigned an (optional) illumination device 21, which has at least one electric light 22. The luminaire 22 has an electrical luminous means, for example a light-emitting diode or the like. The illumination device 21 is arranged in a space 23 due to a curvature of the light concentrator 18.

Additionally or alternatively, the building installation device 3 may have a ventilation device 24. This has at least one ventilation channel 25, which is configured in the embodiment shown here as a supply air duct. Accordingly, 25 air in the direction of arrow 26 from the outside environment 7 are introduced into the interior 8 through the ventilation duct. For this purpose, the ventilation device 24 has at least one air conveying device 27, for example a fan or the like. The ventilation device 24 is preferably equipped with a heat recovery.

For example, air can be taken from the interior 8 by means of the ventilation device 24, which air is subsequently supplied to the outside environment 7. The air contained in this air Heat can be used to control the temperature of the interior 8 supplied air. It can be clearly seen that the ventilation channel 25, seen in cross section, is bounded on the one hand by the light concentrator 16 and on the other hand by the inner lining 11 of the building window 2. Again, therefore, the simple arrangement of the ventilation device 24 is possible mainly due to the curvature of the light concentrator 16.

The FIG. 2 shows a schematic cross-sectional view of the light guide element 12 in a first embodiment. It becomes clear that both light concentrators 16 and 18 are parabolically curved and in this case have a curvature which changes continuously from the light entry surface 13 all the way to the light exit surface 14. The light concentrator 16 is curved in such a way that it focuses the light incident on it at a focal point 28, while the light concentrator 18 focuses the light incident on it at a focal point 29. The focal points 28 and 29 are both in the light exit surface 14, in particular they limit this seen in cross section on opposite sides.

Also indicated are a plurality of light beams 30 which enter the light guide element 12 or the light passage space 15 through the light entry surface 13. These impinge on the light concentrator 18 or pass through the focal point 28. The light rays striking the light concentrator 18 are reflected, namely in the direction of the focal point 29, so that they pass through it. By suitable design of the light concentrator 16 can be achieved so far that all the rays through the light entrance surface 13 in an angular range of θ <θ _max . enter, are reflected in the direction of the light exit surface 14. For the light concentrator 18 applies accordingly. Due to the symmetrical structure of the light guide element 12, therefore, all the light rays within a symmetry plane 20 center enclosing angle range with the size 2θ _max . hit the light exit surface 14 and pass through it. A concentration C results for the construction of the light guide element 12 shown here $$C=\frac{A}{d}=\frac{1}{\sin \left({\theta }_{\mathrm{Max}}\right)}\mathrm{,}$$

For a height H of the light guide element 12 is obtained $$H=\frac{a}{2}\left(1+C\right)\sqrt{1-\frac{1}{C^2}}\mathrm{,}$$

Indicated here is an angular range 31 under which the light beams 30 shown here emerge through the light exit surface 14. In the equations given, A is the size of the light entry surface 13 and a is the size of the light exit surface 14.

The FIG. 3 shows a second embodiment of the light guide element 12. The foregoing is fully incorporated by reference. In addition, a divergence element 32 and a light scattering element 33 are now provided, both of which are optional. The divergence element 32 is here in the form of a honeycomb plate, which is arranged completely within the light guide element 12, or has such a. The divergence element 32 allows each of the incoming light rays 30 to pass in part and in addition partially reflects them. In a corresponding manner, further light beams emerge from each of the light beams 30, so that the light beams resulting from the light beam 30 partially impinge on the light concentrator 16 and partially on the light concentrator 18 and are correspondingly reflected in the direction of the focal points 28 and 29. With the aid of the light scattering element 33, however, a widening and homogenization of the light emerging through the light exit surface 14 can be achieved. The light-scattering element 33 can be present, for example, as a non-absorbent fiber flow with thin fibers, as a powder coating or else as a frosted glass.

For example, on a 45 ° inclined and south-facing roof 4 a range of z. Ex. 25 ° to 65 ° (sun peak in Germany at noon at the solstice) are covered, we obtain according to the above equation with symmetrical installation (symmetry plane 20 corresponds to a roof normal) and a consequent angle θ _max = 20 °, a concentration of C = 3. The concentration C corresponds to the sizes of the light entry surface 13 with respect to the size of the light exit surface 14 seen in cross section. In the present example, therefore, a width of the light entry surface 13 of 30 cm is reduced to a width of the light exit surface 14 of 10 cm. The height H of the light guide element 12 in this case is about 18.85 cm, but could be reduced by up to 50% without much loss. The building installation device 3 is thus very well suited for integration in the roof 4, in particular in interaction with the building window. 2

The FIG. 4 shows a schematic cross-sectional view of the building window device 1 in a third embodiment. In principle, reference is made to the above statements and discussed below the differences. These lie in the fact that the light concentrator 16 and the further light concentrator 18 are subdivided by means of a plurality of separating elements 34 into a plurality of concentrator parts 35 and 36, respectively. Two each of the concentrator parts 35 and 36 abut on opposite sides of each of the separating elements 34. In the embodiment shown here, the separating elements 34 from each other at the same distance. However, different distances can also be realized.

The dividing elements 34 subdivide the light passage space 15 into a plurality of subspaces 37. It is now preferably provided that the subspaces 37 are fluidically interconnected, namely via capillary tubes 38. Via the capillary tubes 38, a pressure equalization between the subspaces 37 can be realized. Another difference from the already described embodiments of the building installation device 1 is that the light exit surface 14 is now not directly adjacent to the light concentrator 16 and the light concentrator 18, but rather is present on a light guide 39, which is preferably configured as a wall passage element. The light guide 39 extends through the extent of the wall surface 10 (not shown here). It preferably closes flush with the wall surface 10 on the interior 8 side. However, it can also project beyond the wall surface 10 and protrude into the interior 8.

In the exemplary embodiment illustrated here, the light-guiding element 39 has two spaced-apart disks 40, which are spaced apart from one another by means of a spacer 41. In addition, the light-guiding element 39 is attached at a distance to a concentrator element 43 forming the light concentrator 16 and / or the further light concentrator via a further spacer 42. The spacer 42 is preferably flexible or elastic. Between the disks 40, a water adsorption and / or absorption device not shown separately may be arranged. For example, this is integrated in the spacer 41.

In addition to the above exemplary embodiments, an outside cover 44 is also shown for the light guide element 12 or the building installation device 1, by means of which the light guide element 12 is weatherproof closed on the outside. The cover 44 may be fastened at a distance from the concentrator element 43 via a further spacer 45. Preferably, the light entry surface 13 is present on this cover 44. Particularly preferably, the cover 44 is in the form of a light-guiding element, which in turn can be configured as a structured glass pane.

The FIG. 5 shows a fourth embodiment of the building installation device 1 in a schematic representation. It can be seen that the light-guiding element 39 serves as a wall-passage element and insofar as the wall surface 10 forming wall 46 passes through. In contrast to the embodiment of the building installation device 1 described above, only a single separating element 34 is provided. However, it is self-evident that basically any number of separating elements 34 can be present or the building installation device 1 can also be designed entirely without such a separating element 34.

The embodiment shown here has a roller blind 47, which is shown by way of example at three different positions. For example, the roller blind 47 is adjacent to or adjacent to the cover 44, at least within the light guide element 12. Alternatively, the roller 47 may also be arranged between the disks 40, ie in the light guide element 39 or in the interior in front of the light exit surface 14. By means of the roller blind 47, an effective light passage area of the building installation device 1 or of the light guide element 12 can be adjusted.

The FIG. 6 shows a schematic representation of the building installation device 1 and the light guide element 12 in a further embodiment. Basically, reference is made to the above statements. In addition, only a reflector 48 is shown here, which is arranged in front of the light exit surface 14 of the light guide element 12. In this case, the reflector 48 is at a distance from the light exit surface 14 and designed in such a way that light beams emerging through the light exit surface 14 are deflected onto a projection surface 49. The projection surface 49 protrudes against the wall 46 and is formed, for example, by the wall surface 10, thus forming part of the wall surface 10. The projection surface 49 preferably surrounds the light exit surface 14 completely. The reflector 48 is configured in such a way that it deflects the light beams in such a way that, viewed at least in section, they impinge on the projection surface 49 on both sides of the light exit surface 14. For this purpose, the reflector 48 consists, for example, of two mutually inclined mirror surfaces 50.

The FIG. 7 shows a schematic representation of the building installation device 1 and the light guide element 12, wherein light rays 30 are shown at different times. The light rays 30 emitted by a higher-standing sun 51 are present, for example, at lunchtime, whereas the light rays emitted by a lower-lying sun 52 are present in the morning or in the evening. It can be seen that the light beams 30 enter the light guide element 12 at different times of daylight for different times of the day.

As already explained above, the cover 44 is now designed as a light-guiding element, which is designed for deflecting light beams in the direction of the light concentrator 16 and the further light concentrator 18, that they at a smaller first angle of incidence in the direction of the light entrance surface 13 and a larger second Be reflected light incident angle in the direction of the light exit surface 14. This is indicated here. For example, the light-directing element is designed such that at the smaller first angle of incidence, a larger part of the light beams and at the larger second angle of incidence, a smaller part of the light beams 30, in particular a smaller part than for the first light incidence angle, in the direction of the light entrance surface 13 are reflected back.

Claims (15)

Light-guiding building installation device (3), in particular for a building window device (1), for a wall and / or roof construction (5) and / or a roof skin (6) of a building at least partially sweeping arrangement on the building, characterized in that the building installation device ( 3) has at least one light guide element (12) which has a translucent light entry surface (13) arranged on the outside of the building installation device (3), an interior light transmitting surface (14) and at least one reflective and curved and / or kinked light concentrator (16) has, by the light entering surface (13) incident light in the direction of the light exit surface (14) reflected, so that the reflected light at least partially through the light exit surface (14) from the building installation device (3) in the light entrance surface (13) facing away from the direction. Building installation device according to claim 1, characterized in that the light guide element (12) on the outside weatherproof closed and / or covered and / or that the light guide element (12) is inside translucent closed and / or covered. Building installation device according to one of the preceding claims, characterized in that the light concentrator (16) in cross-section at least partially, in particular continuously, parabolic and / or with a changing curvature, in particular a continuously changing curvature is curved. Building installation device according to one of the preceding claims, characterized in that the light concentrator (16) seen in cross-section at least partially limits a from the light entry surface (13) to the light exit surface (14) extending light passage space (15). Building installation device according to one of the preceding claims, characterized in that the light passage space (15) seen in cross section at least partially by a reflective, the light concentrator (16) opposite another Light concentrator (18) or a light concentrator (16) opposite wall is limited. Building installation device according to one of the preceding claims, characterized in that the further light concentrator (18) or the wall with respect to a through the light passage space (15) extending symmetry plane (20) symmetrically to the light concentrator (16) is configured. Building installation device according to one of the preceding claims, characterized in that the light concentrator (16) and / or the further light concentrator (18) or the wall each extend from the light entry surface (13) up to the light exit surface (14). Building installation device according to one of the preceding claims, characterized in that the light entry surface (13) on a light-permeable Divergenzelement (32) and / or the light exit surface (14) on a light-transmitting light-guiding element (39) or a light-transmitting light scattering element (33). Building installation device according to one of the preceding claims, characterized in that the divergence element (32) has a honeycomb body, in particular of a transparent material. Building installation device according to one of the preceding claims, characterized in that the light scattering element (33) is a nonwoven material, a powder material, a frosted and / or surface-structured light passage element, a light-scattering film and / or an airgel, in particular a translucent or transparent and / or heat-insulating airgel, having. Building installation device according to one of the preceding claims, characterized in that on the side facing away from the light passage space (15) of the Lichtkonzentrators (16) comprises at least one electric light (22) lighting device (21) and / or a ventilation device (24) and / or a Insulation is arranged. Building installation device according to one of the preceding claims, characterized in that the illumination device (21) is arranged on the inside of the building installation device (3). Building installation device according to one of the preceding claims, characterized in that the ventilation device (24) has a ventilation channel (25), seen in cross section at least partially between the light concentrator (16), the further light concentrator (18) or the wall on the one hand and an inner lining ( 11) of a building window (2) is arranged on the other hand, in particular of these is limited. Building installation device according to one of the preceding claims, characterized in that in addition to the ventilation channel (25) there is a further ventilation channel, wherein the ventilation channel (25) and the further ventilation channel are formed as a supply air duct and exhaust duct, which are heat-transmitting connected to each other. Building window device (1) with a building window (2) and a light-guiding building installation device (3), in particular a building installation device (3) according to one or more of the preceding claims, for a wall and / or roof construction (5) and / or a roof skin (6 ) of a building at least partially sweeping arrangement on the building, characterized in that the building installation device (3) has at least one light guide element (12), the outside of the building installation device (3) arranged light-transmitting light entrance surface (13), an inside arranged, translucent Light exit surface (14) and at least one reflective and curved and / or kinked Lichtkonzentrator (16) which reflects light incident through the light entrance surface (13) in the direction of the light exit surface (14), so that the reflected light at least partially through the light exit surface (14) from d he building installation device (3) in the light entrance surface (13) facing away from the direction.

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