DE29907390U1 - Photovoltaic shading element - Google Patents

Description

Photovoltaic shading element

The present invention relates to a shading element, in particular a photovoltaic shading element, with the features specified in the preamble of claim 1.

On the one hand, slat-shaped shading elements are known from the state of the art, which reflect or absorb the excess light that is not required for room illumination.

On the other hand, large-area photovoltaic elements composed of several small photovoltaic cells in a mosaic manner are known.

These have the disadvantage that sunlight can pass unhindered between the numerous small photovoltaic cells. Effective shading in accordance with the Workplace Ordinance is not possible with such mosaic-shaped photovoltaic elements.

The object of the present invention is therefore to provide a photovoltaic shading element which does not reflect or absorb the excess light not required for lighting the room, but rather converts most of it into electrical energy and which, moreover, enables particularly effective shading which even meets the strict requirements of the Workplace Ordinance.

According to the invention, this object is achieved in a generic shading element by the features specified in the characterizing part of claim 1.

Particularly preferred embodiments are the subject of the subclaims.

Embodiments of the invention are described in more detail with reference to the drawings.
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Figure 1 shows a schematic front view of a photovoltaic or photoelectric slatted shading element according to the invention with a circuit board with electrically conductive connection options integrated in a gas-tight manner into the insulating glass spacer frame;

Figure 2 is a schematic front view of a shading element according to the invention, the slats of which are arranged in a fixed manner in slat supports aligned transversely to the slat longitudinal axis.

Figure 3 shows a schematic cross section through a lamella used according to the invention, which, on a carrier material underneath, initially carries a first large-area means (5) for generating electrical voltage and/or electrical current by irradiation with light, then an optionally lacquer-like separating layer and finally a second large-area means (5) for generating electrical voltage and/or electrical current by irradiation with light;

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Figure 4 is a schematic, partially sectioned side view of a shading element according to the invention with slats that can be moved vertically via a cable pull mechanism and a circuit board for electrical connections that is integrated in a gas-tight manner into the insulating glass spacer;

Figure 5 shows a schematic cross section through a lamella used according to the invention with a central carrier material, the top and bottom of which are each coated with a means (5) for generating electrical voltage and/or electrical current by irradiation with light;

Figure 6 shows a schematic cross section through a lamella used according to the invention without a carrier layer, which consists essentially completely of a means (5) for generating electrical voltage and/or electrical current by irradiation with light.

As can be seen from the figures, the optionally photovoltaic shading element according to the invention comprises one or more horizontally and/or vertically and/or diagonally aligned slats (1). These can be fixed or mounted so as to be vertically and/or horizontally and/or diagonally movable, for example in an insulating glass spacer frame (6).

In particularly preferred embodiments, the slats (1) are at least slightly pivotable about their longitudinal axis (2).

As a rule, the slats (1) are operated by means of at least one manual, magnetic, rope-type, rack-type, knob-type, mechanical, electrical, hydraulic

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vertically and/or horizontally and/or obliquely movable and/or pivotable about its longitudinal axis (2) by means of a hydraulic or pneumatic adjustment device.

Of course, it is possible to provide the slats (1) in such a way that they cannot pivot about their longitudinal axis (2).

As a rule, the slats (1) are essentially rectangular in plan view and have a straight or at least slightly curved cross-sectional area downwards or upwards.

The advantage in particular of a curved cross-sectional area of the slat (1) is that light incident on the shading element according to the invention can be redirected, for example to illuminate the ceiling area of a room.

An essential feature of the optionally photovoltaic shading element according to the invention is that one or more means (5) for generating electrical voltage and/or electrical current by irradiation with light are provided on the upper side (3) of the slats and/or on the lower side (4) of the slats.

This at least one means (5) can be designed over a large area or in the form of several subunits arranged next to one another and/or one above the other, as well as in one or more layers with or without intermediate separating layers.

Alternatively or additionally, it is possible to produce the at least one lamella (1) essentially completely from a

or several means (5) for generating electrical voltage and/or electrical current by irradiation with light.

The effect of the means (5) for generating electrical voltage or electrical current by irradiation with light can, for example, be based at least partly on a photo-voltaic effect.

As a rule, in such a photovoltaic means (5) for generating electrical voltage or electrical current by irradiation with light, a voltage occurs across a p-n junction when light is irradiated.

Such a means (5) for generating electrical voltage or electrical current by irradiation with light can in principle be any photovoltaically effective component or material.

Preferably, such a means (5) for generating electrical voltage and/or electrical current by irradiation of light is designed in the form of a complete or partial photo or solar cell, which is generally made essentially from one or more metals and/or one or more plastics, comprises no or one carrier material and has a single or multi-layer structure with or without separating layers.

It is also possible to use one or more semiconductor diodes, for example based on silicon, selenium or gallium arsenide, into whose p-n junction light is radiated.

Light quanta with an energy greater than the band gap are absorbed there and create electron-hole pairs. These are separated due to their opposite electrical charges in the field prevailing in the barrier layer and lead to a photovoltage when the terminals are open, and to a photocurrent when a consumer is connected.

Of course, it is possible to use one or more other semiconductor components or components as means (5) instead of one or more semiconductor diodes, which contain a p-n junction in which light is converted directly into electrical energy.

In principle, any material that has an external or internal photoelectric effect or a photoelectric or photoelectric and/or photo-voltaic effect can be used as a means (5) for generating electrical voltage and/or electrical current by irradiation with light.

Materials (5) ro.it Photoelectric effect are understood to mean in particular those materials which allow the generation of free, mobile charge carriers by absorbing light quanta (photons).

These include homogeneous or inhomogeneous or heterogeneous photoconductors, semiconductor diodes, photodiodes, photoelements and organic or inorganic molecular crystals.

The means (5) for generating electrical voltage or electrical current by irradiation with light can thus essentially be doped or undoped, monocrystalline or amorphous

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silicon, selenium or gallium arsenide or a photovoltaically active plastic or a mixture of these.

The means (5) for generating electrical voltage and/or electrical current by irradiating light on the top side (3) of the slats and on the bottom side (4) of the slats can be the same or different from one another.

Preferably, the at least one means (5) for generating electrical voltage and/or electrical current is applied by irradiating light onto the top side (3) of the slats and/or onto the bottom side (4) of the slats by chemical vapor deposition (CVD), spraying, spreading, squirting, sticking, attaching, laying, snapping, pulling on, clamping, ironing or in the form of a self-adhesive or glued foil, a thin layer or a film onto the slat carrier material (7).

Alternatively or additionally, the lamella (1) can be made essentially completely and in one or more pieces from the means (5) for generating electrical voltage and/or electrical current by irradiation with light, with partial or complete omission of a carrier material (7).

In principle, it is possible to provide the cladding element according to the invention within a double or multi-pane, coated or uncoated insulating glass pane.

Alternatively or additionally, it is possible to install the shading element according to the invention outside an existing glazing arrangement, at least on one side thereof.

Such installation outside of an existing glazing arrangement can be reversible or irreversible and can be factory fitted or retrofitted.

As a rule, the at least one means (5) for generating electrical voltage and/or electrical current is tapped in an electrically conductive manner once or multiple times by irradiating light on the upper side (3) of the slats and/or on the lower side (4) of the slats in order to take an electrical voltage and/or to take an electrical current.

The contacts that may be required for this purpose can be at least partially integrated into the means (5) or be attached thereto directly or indirectly, for example by soldering, welding, laser welding, gluing, plugging, snapping or screwing.

As already stated, the shading element according to the invention can be arranged within an insulating glass spacer frame (6).

For the essentially gas-tight passage of the voltage generated by the means (5) or the current generated thereby through the insulating glass spacer frame (6), one or more cables sealed through the insulating glass spacer (6) can be used.

However, if particularly high requirements are placed on the gas-tightness of the penetration through the insulating glass spacer (6), the use of one or more

several conductor track boards (8) integrated in the insulating glass spacer (6) in a substantially gas-tight manner have proven to be particularly advantageous. These preferably have one or more connection options on their inside and corresponding connection options on their outside.

In summary, it can be stated that the shading element according to the invention does not reflect or absorb the excess light that is not required for lighting the room, but rather converts most of it into electrical energy and makes it available. In addition, the shading element according to the invention enables particularly effective shading that even meets the strict requirements of the Workplace Ordinance.

Claims (12)

Protection claims 1. Shading element with one or more horizontally and/or vertically and/or diagonally aligned slats (1), which are fixed or vertically and/or horizontally and/or diagonally movable and which can be pivoted or not pivoted at least slightly about their longitudinal axis (2), characterized in that the top of the slats (3) and/or the slat underside (4) are provided with at least one means (5) for generating electrical voltage and/or electrical current by irradiation with light or that the at least one slat (1) essentially consists of one or more single or multi-piece means (5) for generating electrical voltage and/or electrical current by irradiation with light. 2. Shading element according to claim 1, characterized in that the slats (1) are essentially rectangular in plan view and have a straight or at least slightly curved downwards or upwards cross-sectional area. 3. Shading element according to one of the preceding claims, characterized in that the means (5) for generating electrical voltage and/or electrical current by irradiation of light in the form of a complete or partial photo or solar cell, a photoconductor, a homogeneous or heterogeneous photoconductor, a semiconductor diode, a photodiode or a Photoelement or inorganic or organic molecular crystals, individually or in combination with one another, as well as over a large area or in the form of several subunits arranged next to one another and/or one above the other and in one-5 or multiple layers with or without intermediate separating layers. 4. Shading element according to one of the preceding claims, characterized in that the effect of the means (5) for generating electrical voltage and/or electrical current by irradiation of light is based at least partially on a photovoltaic effect and/or on a photo effect and/or on a photoelectric effect and/or on a photoelectric effect. 5. Shading element according to one of the preceding claims, characterized in that the means (5) for generating electrical voltage and/or electrical current by irradiating light on the top side of the slats (3) and on the bottom side of the slats (4) are the same or different from one another. 6. Shading element according to one of the preceding claims, characterized in that the at least one means (5) for generating electrical voltage and/or electrical current by irradiating light on the slat top side (3) and/or on the slat bottom side (4) is applied by chemical vapor deposition (CVD), spraying, brushing, spraying, attaching, laying, gluing, snapping in, putting on, clamping, ironing or in the form of a self-adhesive or glued foil, a thin layer or a film. 7. Shading element according to one of the preceding claims, characterized in that the means (5) for generating electrical voltage and/or electrical current by irradiation with light essentially comprises doped or undoped, monocrystalline or amorphous silicon, selenium or gallium arsenide or essentially consists of a photovoltaically active plastic or represents a mixture thereof. 10 8. Shading element according to one of the preceding claims, characterized in that it is provided within a double or multi-pane, coated or uncoated insulating glass pane. 9. Shading element according to one of the preceding claims, characterized in that it is arranged outside an existing glazing arrangement on at least one side thereof, either at the factory or as a retrofittable assembly, and reversibly or irreversibly. 10. Shading element according to one of the preceding claims, characterized in that the at least one means (5) for generating electrical voltage and/or electrical current by irradiating light on the slat top side (3) and/or the slat bottom side (4) is tapped in an electrically conductive manner once or multiple times. · · I 11. Shading element according to one of the preceding claims, characterized in that the essentially gas-tight passage of the generated electrical voltage and/or the generated electrical current through the insulating glass spacer (6) takes place by means of one or more cables or by means of one or more circuit boards (8) integrated in the insulating glass spacer (6) in an essentially gas-tight manner, which have one or more connection options on their inside and corresponding connection options on their outside. 12. Shading element according to one of the preceding claims, characterized in that the slats (1) can be moved vertically and/or horizontally and/or obliquely and/or pivoted about their longitudinal axis (2) by means of at least one manual, magnetic, cable-like, rack-like, rotary knob-like, mechanical, electrical, hydraulic or pneumatic adjustment device.