EP4174278A1 - Current discharge system for a shading device and shading device therefor - Google Patents

Abstract

The invention relates to a current discharge system for a shading device with a large number of slats (7) which are each movably mounted by means of guide bolts (10, 20) in at least one lateral guide rail (1, 1a, 1b), the shading device having photovoltaic elements for generating electricity. which are electrically connected to the guide bolts (10, 20) of the respective slat (7), with the at least one guide rail (1, 1a, 1b) having a total of at least two electrical busbars (4), so that electrical contact is made with the photovoltaic elements of the Lamellas (7) is present to dissipate the electricity generated. The invention also relates to a shading device with a large number of slats (7), each with at least one photovoltaic element for generating electricity, with a current discharge system according to the invention being present for dissipating the generated electricity.

Description

The invention relates to a current removal system for a shading device with a large number of slats which are each movably mounted by means of guide bolts in at least one lateral guide rail and each have at least one photovoltaic element for generating electricity.

The invention also relates to a shading device with a large number of slats, which are each movably mounted by means of guide bolts in at least one lateral guide rail and each have at least one photovoltaic element for generating electricity.

External venetian blinds with slats on which photovoltaic elements (also called photovoltaic cells) are applied are already known from the prior art. For this purpose, for example, reference is made to the publications DE 10 2007 031 236 A1 or DE 10 2014 200 359 A1 referred.

Furthermore, it is from the pamphlet DE 21 2019 000 358 U1 known to connect the slats by means of a conductor wire for current dissipation. However, this conductor wire is visually unattractive and has a negative effect on the handling and functionality of the external venetian blind.

From the pamphlets EP 3690176 A1 and EP 3892813 A1 generic current removal systems are also known, whereby on the one hand there are no busbars that run over the entire height of the shading device, so that the electrical contact is only made at certain points, and on the other hand the electrical contact between the busbar and contact means is rigid, i.e. not spring-loaded.

The pamphlet CN 110094153B shows a photovoltaic blind with a contact means designed as a spring contact pin, the spring force being exerted in the longitudinal direction of the slat or the guide bolt.

Reference is also made to the publication as further prior art CN 202047738 U referred.

It is therefore the object of the invention to provide an alternative current discharge for a shading device with photovoltaic slats and a shading device for this.

This object is solved by the features of the independent patent claims. Advantageous developments of the invention are the subject matter of subordinate claims.

The inventors have recognized that there is an alternative possibility of dissipating the electrical energy generated in the photovoltaic elements on the movable slats of an external venetian blind or a blind to a power grid or power storage device and of avoiding the disadvantages of the prior art.

The invention therefore describes the possibility of dissipating current via the guide rail without complex wiring of the individual slats.

An electrically conductive metal pin, for example made of aluminum or a copper alloy, can be inserted into the guide bolts of the slats. The guide pin is made of an electrically non-conductive material, such as plastic. Electrically conductive busbars can be inserted into the guide rail on both sides or on one side, which create a sliding contact with the metal pin. The busbars can be resiliently mounted in the guide rail so that they can be gently rested against the guide bolts or the metal pins. Excessive friction impedes the function of the external venetian blind and leads to jamming when the slats are raised and lowered.

The electrical energy generated in the photovoltaic elements of the slats is diverted via the contact to the busbar in the guide rail to a power grid or a power storage unit.

In order to increase the voltage of the current dissipation system so that there are fewer losses, several slats can be connected in series in different ways. Ideally, the voltage can be increased to 24 to 30 volts, so that an additional voltage converter is not required. In principle, it is also possible for the slats to be connected to one another via a parallel connection in order to increase the current intensity that is dissipated.

The weather resistance of the power supply system is an important part of the construction due to its location on an outside facade. In order to be able to guarantee a long service life, external influences such as dirt and rain on the grinding elements should be reduced in order to avoid dirt or corrosion. In addition to accelerated wear, the occurrence of contamination or corrosion can lead to an increase in the electrical resistance of the conductors, which leads to power losses.

For example, brush strips or brush seals can be inserted into the openings of the guide rails, which at least partially cover the openings. The guide bolts can be easily moved by the brushes when the slats are raised and lowered. Above all, the brushes used should be water-repellent, highly flexible, weather- and temperature-resistant from ideally -30°C to +60°C and UV-resistant. Brushes made from substitute materials such as, inter alia, polyamides, polyvinyl chloride, polystyrene, polyester or polypropylene are particularly suitable. Among the polyamides, nylon and perlon have become the best known. The product polyamide is suitable, for example, for ceiling brushes, for various brushes or brooms. Polyester fibers are very stiff and hardly absorb any water. Polypropylene becomes brittle below 0°C and is environmentally harmless if it is not plasticized.

Likewise, rubber seals or sealing lips can be used in the openings of the guide rails. These can hold off a little more dirt and water and protect against self-contamination, as is the case, for example, with brushes that are becoming brittle. The rubber seals can also be fitted on either side of the openings and will stretch as a guide pin moves up or down the middle of the two seals. The rubber seals used should above all be water-repellent, permanently flexible, weather-resistant, especially UV-resistant, and temperature-resistant from ideally -30°C to +60°C and have the lowest possible coefficient of static friction. Above all, rubber seals made of silicone rubber are suitable due to its permanent elasticity with low compression set (absolutely elastic), high resistance to aging, very high UV and temperature resistance and full resistance to water-dilutable and conventional paints.

Furthermore, flexible fabric webs can also be attached between the guide bolts of adjacent slats, which at least partially cover the openings of the guide rails when the external venetian blind or venetian blind is in the lowered state. Above all, the fabric used should be water-repellent, flexible, weatherproof and temperature-resistant from ideally -30°C to +60°C, especially UV-resistant, tear-resistant and as breathable as possible.

Different photovoltaic elements can be used on the slats. The different concepts for the photovoltaic slats can be divided according to the different technologies of the photovoltaic elements used. First generation photovoltaic elements (wafer-based photovoltaic elements) and second generation photovoltaic elements are characterized by not exceeding the Shockley-Queisser (SQ) limit for single band section devices. Third-generation photovoltaic elements, on the other hand, have an efficiency potential above the SQ limit. The SQ limit describes the maximum achievable conversion efficiency of solar energy for a specific material. The frontier is the benchmark against which new photovoltaic technologies are compared. A certain material has a certain band gap, which is responsible for the fact that only certain spectrums of light can be absorbed. The remaining spectra cannot be absorbed and therefore cannot be used to convert them into electricity (first and second generation photovoltaic elements). Photovoltaic elements of the third generation circumvent this fact, for example with so-called tandem photovoltaic elements, in which several materials are used in different layers in order to be able to also absorb the remaining spectrum of the light and convert it into electricity.

First generation conventional photovoltaic elements:
First-generation photovoltaic elements, i.e. wafer-based photovoltaic elements, are used here. This technology is advantageous because, due to many years of research and its large market share, it has a particularly high degree of long-term testing and a very good price-performance ratio as well as a very high efficiency. A major disadvantage, however, is that mass-produced photovoltaic modules using this technology are only available in sizes that cannot be applied to the slats. Therefore, slats fitted with conventional photovoltaic elements must be manufactured in such a way that the photovoltaic elements on the raw slats themselves form a module connected and laminated. Since individual standard photovoltaic elements are too large for the slats, these have to be cut through.

Second and third generation photovoltaic elements:
These photovoltaic elements have the advantage that they can be produced in almost any size with significantly fewer modifications of the production process, partly due to other production methods. As a result, the existing surface of the slat can be used without free spaces and thus more efficiently. On the other hand, a decisive disadvantage is that, based on the current state of the art, photovoltaic elements of the second and third generation often cannot compete with the photovoltaic elements of the first generation in terms of their efficiency. Some manufacturing processes allow the photovoltaic cell layer, which is a thin film, to be vapour-deposited directly onto the lamellae, which then act as a substrate. It may be beneficial to do this by pre-coating the lamellae so that they have more suitable properties for their role as a substrate. The methods used during the manufacturing process include thermal evaporation, sputter deposition, laser deposition and metal-organic vapor phase epitaxy.

Adhesive photovoltaic elements of the second and third generation:
Photovoltaic elements of the second and third generation are also used here, although they are not produced on the slat itself, but on a foil and then glued to the slats. This concept has the decisive advantage that a spatial separation between the production of the slats and the production of the photovoltaic elements is possible. The photovoltaic foil can be manufactured by the meter and pre-stored in the correct width and cut to size.

In addition, different slats can also be used. Positive effects can result from the use of lamellas that are less curved in the application area of the photovoltaic elements, for example flat lamellas. On the one hand, the photovoltaic elements only have to adapt to a less pronounced bend, which simplifies the production process and reduces the demands on the photovoltaic elements themselves. On the other hand, the photovoltaic elements can be protected more easily from external influences. It is crucial that the encapsulation of the photovoltaic cell layer at the edges of the slats is sufficiently strong and adheres reliably so that it can unfold its encapsulating effect. Since expansion or contraction of the lamellae can cause detachment at weak points such as the edges, it makes sense to take special precautions here. For example, the encapsulation can be wrapped around one or more outer edges of the lamellae, so that the film can also adhere to the underside of the lamellae. Since the flat lamella has no flanging on the outer edges, the film can be folded over without any problems. In the case of a lamella with a beaded edge, the film would not be able to be turned over and laminated without problems and the package height would continue to increase, since the film would reach over the bead and thus further thicken the thickest part of the lamella. The film can then be attached particularly strongly to the underside by other possible methods such as gluing.

Accordingly, the inventors propose a power dissipation system for a shading device, in particular an external venetian blind or a blind, with a large number of slats, which are each movably mounted by means of guide bolts in at least one lateral guide rail and each have at least one photovoltaic element for generating electricity, which is connected to the guide bolts of the respective slat is electrically connected, with a total of at least two electrical busbars being present in the at least one guide rail, so that there is electrical contact with the photovoltaic elements of the slats in order to dissipate the electricity generated, two lateral guide rails being formed and a total of at least two in the two guide rails electrical busbars are present, and a guide pin has at least one contact means, which forms the electrical contact to the busbar, to the effect that the at least one contact means is designed as an electrically conductive pin, which is inserted in the non-conductive guide pin and has an enlarged head for contacting which has at least one busbar, the electrical contacting of the busbar being perpendicular to the longitudinal direction of the guide bolt, and the electrical contact between the busbar and head having a compression spring, so that a spring force presses the busbar and the head together perpendicular to the longitudinal direction of the guide bolt.

The power dissipation system according to the invention serves to feed the power generated in the photovoltaic elements of the slats into a power grid or a power storage device. Depending on the design of the current dissipation system an inverter is advantageously additionally provided. The shading device is preferably a venetian blind or a blind, in particular a blind canopy. The invention is described below using a shading device designed as an external venetian blind.

According to the invention, two lateral guide rails are formed in which the guide bolts are movably mounted, ie one guide rail on each side of the shading device. Accordingly, there are a total of at least two electrical busbars in the two guide rails. In the following, the invention is described for an embodiment with two laterally attached guide rails, ie one guide rail on each side. However, an embodiment with only one guide rail, so that the shading device is movably mounted in a guide rail on only one side, is also within the scope of the invention.

As with conventional external venetian blinds, the slats of the external venetian blind are movably mounted in the lateral guide rails by means of the guide bolts attached to the short longitudinal ends. When the slats are raised and lowered, the guide pins move in the guide rails.

The photovoltaic elements of the slats are electrically connected to the guide bolts, for example by means of soldering or copper wire. One embodiment of the current dissipation system therefore provides that the at least one photovoltaic element of a lamella is electrically connected to the at least one contact means, for example via a soldered connection or a cable connection.

According to the invention, there are a total of at least two electrical busbars in the two guide rails of an external venetian blind or a slat pack. The movable guide bolts, which are electrically connected to the photovoltaic elements, make contact with the stationary busbars, so that the electricity generated is discharged into the electricity grid or into an electricity storage device. There is preferably a sliding contact between the contact means on the guide pin and the busbar.

Each lamella has at least two contact means, ie at least one contact means at each longitudinal end, ie at least two in total per lamella.

Advantageously, the longitudinal ends of the lamellae or the guide bolts are of the same design with regard to the number, arrangement and design of the contact means. The contact means are attached to the guide bolts of the slats. A guide pin therefore advantageously has at least one contact means which forms the electrical contact with the busbar. During operation, each contact means generates an electrical connection or an electrical contact only to a single potential. In total, each lamella then has contact to two potentials.

In a variant of the current discharge system, each guide pin of a slat has exactly one contact means, with one contact means making contact during operation, ie with active current discharge, one or two busbars of the same potential. For this variant, there can be either one or two busbars in the guide rail.

Correspondingly, in one embodiment, the guide rail has precisely one busbar. The one contact means forms precisely one electrical contact with this one busbar.

In an alternative embodiment, the guide rail has exactly two busbars. During operation, these two busbars can either be at the same potential or at different potentials. One embodiment provides that the two busbars are at the same potential during operation. Another embodiment provides that the two busbars are at different potentials during operation. One contact means forms exactly one electrical contact with each of the two busbars.

The bus bar(s) is/are located either opposite the longitudinal opening of the guide bar or on the sides of the longitudinal opening in the guide bar. In an embodiment with two busbars, these two busbars are preferably arranged opposite one another on the two sides of the longitudinal opening.

In another variant of the current dissipation system, each guide bolt of a lamella has two contact means, with the contact means each contacting a busbar, with the busbars having different potentials during operation. Advantageously, therefore, lies from each Contact means only have an electrical contact to a busbar, the two contact means being in total contact with two different potentials at the two longitudinal ends of a lamella. The two contact means are advantageously insulated from one another in the guide pin.

According to the invention, the electrical contact between the busbar and the contact means has compression springing so that the busbar and the head are pressed against one another perpendicularly to the longitudinal direction of the guide pin. This ensures that contact means and busbar are always pressed against one another, for example manufacturing inaccuracies are compensated for and the electrical connection is not unintentionally released. The compression springing can be designed in different ways. In a simple embodiment, the busbar is designed to be resilient or is mounted resiliently or prestressed. An alternative embodiment provides an additional insert in the guide rail, in which the busbar is arranged, with the insert supporting the busbar in a resilient manner or being designed in a resilient manner. If an additional insert is used in the guide rail, the busbar is preferably either glued into the insert or clipped into it.

Furthermore, a piping-like plastic insert or rubber lips is preferably arranged in the longitudinal opening of the guide rail, advantageously on both sides, in order to ensure friction-free sliding of the guide bolts through the longitudinal opening. The plastic insert or the rubber lips are advantageously made of a non-conductive material, like the guide rail.

The busbars are basically made of a material that is as conductive as possible. In a preferred embodiment, a metal or an alloy, for example (made of) copper or aluminum, is suitable for this. Furthermore, the busbars are preferably designed as a flat strip or flat rod. A busbar advantageously extends over the entire height of a guide rail.

As an alternative embodiment, the busbars can be designed as electrically conductive brushes.

Furthermore, it is favorable if at least one lower end of the busbars is insulated in order to avoid a short circuit when installed in a metal window sill or when it rains, etc.

According to the invention, the at least one contact means is designed as an electrically conductive pin which is inserted in the non-conductive guide pin and has an enlarged head for contacting the at least one busbar, with the electrical contacting of the busbar being made perpendicular to the longitudinal direction of the guide pin. The pin is inserted in the guide bolt along the longitudinal direction of the slat and protrudes beyond this into the guide rail. The guide pin forms a kind of insulating shaft around the pin. At the free end of the pin, i.e. the end not arranged in the guide pin, this has a significantly enlarged head. The electrical contact to the busbar(s) is made with the pin head, ie the pin head rests on the busbar and slides along it when the lamella moves up or down.

In a variant with one contact means per guide pin, the pin is either T-shaped, with the T-bar being formed by the head and the ends of the bar being able to contact a total of one or two busbars. Or the pin is L-shaped, with the end of the short leg of the L being able to contact a busbar.

In a variant with two contact means per guide pin, the pins are advantageously L-shaped and the ends of the L-legs each contact a busbar.

In addition, the guide rail is preferably designed in such a way that a temperature-related change in length of the slat, in particular in its longitudinal direction, can be compensated for in the guide rail. To ensure trouble-free operation of the current dissipation system, a break in the electrical contact between the busbar and the contact means should be prevented. A simple variant provides that, in the case of a contact means designed as a pin with an enlarged head, the head has a smaller width than the busbar when viewed in the longitudinal direction of the lamina. This allows the head to move back and forth in the longitudinal direction of the slat without losing electrical contact.

A further variant of the power dissipation system also provides that two guide rails are formed on each side of the shading device, with the guide bolts of adjacent slats being arranged alternately in the two guide rails on each side. The guide rails are advantageously arranged next to one another and parallel in their longitudinal direction. Correspondingly, the guide bolts that engage in the guide rail arranged on the outside are longer than the guide bolts that engage in the guide rail that is arranged further inwards. During operation, the two guide rails on one side are either at the same potential or at different potentials, with each lamella being connected to two different potentials.

Furthermore, the current discharge system according to the invention is advantageously protected from the effects of the weather such as rain, solar radiation, etc., in order to ensure the longest possible service life with little wear.

One embodiment of the current dissipation system therefore provides that rubber seals and/or brush seals are inserted at least in sections into the longitudinal openings of the guide rails. These seals do not completely close the longitudinal opening, but allow the guide pins to slide up and down through the seals.

• die einfache Umsetzbarkeit durch vorgefertigte Leisten, die entlang der Längsöffnungen aufgebracht werden können;
• Bürstendichtungen sind witterungs- und wasserbeständig;
• der Austausch von Lamellen wird dadurch nicht beeinflusst; und
• Schutz in allen Positionen der Lamellen.

The advantages of brush seals, for example made of nylon or perlon, are:

• the ease of implementation thanks to prefabricated strips that can be applied along the longitudinal openings;
• Brush seals are weather and water resistant;
• this does not affect the replacement of slats; and
• Protection in all positions of the slats.

However, individual bristles can come loose and thus soil the busbars. A brush seal also does not offer complete protection against the ingress of moisture and dust.

• Schutz vor Spritzwasser und Schmutz;
• leichte Installation;
• der Austausch von Lamellen wird dadurch nicht beeinflusst;
• Schutz in allen Positionen der Lamellen.

The advantage of rubber seals, for example made of silicone rubber, is:

• protection against splashing water and dirt;
• easy installation;
• this does not affect the replacement of slats;
• Protection in all positions of the slats.

However, there are high demands on the material of the rubber seals, as they should be permanently elastic and not become brittle. The friction of the guide pins on the seal is significantly greater with a rubber seal than with a brush seal.

Another embodiment of the power dissipation system provides that a fabric insert is arranged between the guide bolts of adjacent slats, which is stretched when the slats are in the lowered state and at least partially covers the openings of the guide rails. The material used is advantageously as flexible as possible, weather-resistant and breathable as well as waterproof and UV-proof.

• die Längsöffnungen werden staub- und wasserdicht abgedeckt;
• Installation schon mit mittlerem Aufwand möglich; und
• eingedrungene Feuchtigkeit kann wieder verdunsten.

The advantage of fabric inserts is:

• the longitudinal openings are covered to make them dustproof and watertight;
• Installation possible with moderate effort; and
• Penetrated moisture can evaporate again.

However, a fabric insert only protects the longitudinal opening when the slats are lowered. Depending on the material, the individual fabric areas can fray on the sides. Replacing individual slats is made more difficult by the fabric inserts attached to the slats.

In an advantageous embodiment of the power dissipation system according to the invention of a shading device with a large number of slats with photovoltaic elements, it is proposed that at least two slats in each case be electrically connected to one another in series to form a set of slats, with the connection points between the two slats of a set of slats being parallel to one another via a busbar in each case are electrically coupled.

• die potentialgleichen Verbindungsstellen zwischen der jeweils ersten Lamelle und der zweiten Lamelle eines Lamellensatzes über eine Sammelschiene auf einer ersten Seite der Beschattungseinrichtung elektrisch verbunden sind, und
• jeder Lamellensatz an je eine positive und eine negative Sammelschiene auf der zur ersten Seite gegenüberliegenden zweiten Seite der Beschattungseinrichtung elektrisch angeschlossen ist. Hieraus ergibt sich dann, dass die Lamellen bezüglich ihrer Polarität von oben nach unten alternierend angeordnet sind.

If several sets of slats are used in the shading device, each consisting of two slats connected in series, this can be implemented by having exactly two slats connected in series for each set of slats, where:

• the equipotential connection points between the respective first slat and the second slat of a set of slats are electrically connected via a busbar on a first side of the shading device, and
• each set of slats is electrically connected to a positive and a negative busbar on the second side of the shading device, opposite the first side. From this it follows that the lamellae are arranged alternately with regard to their polarity from top to bottom.

• die potentialgleichen Verbindungsstellen zwischen den jeweils ersten Lamellen und den zweiten Lamellen über eine erste Sammelschiene auf einer ersten Seite der Beschattungseinrichtung elektrisch verbunden sind,
• die potentialgleichen Verbindungsstellen zwischen den jeweils zweiten Lamellen und den dritten Lamellen über eine zweite Sammelschiene auf einer zweiten - der ersten Seite gegenüberliegenden - Seite der Beschattungseinrichtung elektrisch verbunden sind, und
• jeder Lamellensatz an eine positive Sammelschiene und eine negative Sammelschiene auf jeweils einer Seite der Beschattungseinrichtung elektrisch angeschlossen ist.

If several sets of slats are used in the shading device, each consisting of three slats connected in series, this can be achieved by designing a current dissipation system in such a way that there are exactly three slats connected in series for each set of slats, where:

• the equipotential connection points between the respective first slats and the second slats are electrically connected via a first busbar on a first side of the shading device,
• the equipotential connection points between the respective second slats and the third slats are electrically connected via a second busbar on a second side of the shading device, opposite the first side, and
• each set of slats is electrically connected to a positive bus bar and a negative bus bar on either side of the shading device.

The invention also relates to a shading device, in particular an external venetian blind or a venetian blind, at least having a hanging with a large number of slats, which are each movably mounted by means of guide bolts in at least one lateral guide rail and each have at least one photovoltaic element for generating electricity, with the discharge of the generated Stromes a current removal system described above, according to the invention is present.

The shading device is preferably a venetian blind or a blind, in particular a blind canopy. The invention is also described in terms of a shading device designed as an external venetian blind.

The structure of the external venetian blind corresponds to that of a conventional external venetian blind. Photovoltaic elements for power generation are attached to the slats, for example as a complete coating of the slats or individual areas on the slats. It can be both conventional Photovoltaic elements of the first generation so also photovoltaic elements of the second or third generation are used.

One embodiment of the shading device, in particular an external venetian blind, provides that the curtain comprises at least a first slat pack and a second slat pack, the slat packs being tilted differently about the respective longitudinal axes of the slats. This type of curtain is also generally referred to as a two-part curtain. Preferably, an upper set of disks can be rotated or tilted separately from the remaining disks. For example, a lower area of the curtain can be completely closed for power generation, while an upper area is still open or at least partially open to allow daylight to enter a room.

The invention is described in more detail below on the basis of the preferred exemplary embodiments with the aid of the figures, with only the features necessary for understanding the invention being shown.

FIG 1:

eine schematische Perspektivansicht eines Raffstores mit Stromabführungssystem mit einer Führungsschiene,

FIG 2:

eine geschnittene Perspektivansicht des Raffstores mit Stromabführungssystem gemäß der Figur 1,

FIG 3:

eine schematische Querschnittsansicht durch die eine Führungsschiene mit Führungsbolzen gemäß der Figur 1,

FIG 4:

eine schematische Perspektivansicht eines Raffstores mit Stromabführungssystem mit zwei Führungsschienen,

FIG 5:

eine geschnittene Perspektivansicht des Raffstores mit Stromabführungssystem gemäß der Figur 4,

FIG 6:

eine schematische Perspektivansicht der zwei Führungsschienen mit Führungsbolzen gemäß der Figur 4,

FIG 7:

eine schematische Unteransicht des Raffstores mit Stromabführungssystem gemäß der Figur 4,

FIG 8:

eine schematische Querschnittsansicht des Raffstores mit Stromabführungssystem gemäß der Figur 4,

FIG 9:

eine schematische Darstellung eines Raffstores mit Stromabführungssystem und einer ersten Reihenschaltung der Lamellen,

FIG 10:

schematisch vereinfachte Darstellung der elektrischen Serienschaltung des Raffstores gemäß Figur 9,

FIG 11:

eine schematische Darstellung eines Raffstores mit Stromabführungssystem und einer weiteren Reihenschaltung der Lamellen, und

FIG 12:

schematisch vereinfachte Darstellung der elektrischen Serienschaltung des Raffstores gemäß der Figur 11.

They show in detail:

1:

a schematic perspective view of an external venetian blind with a power dissipation system with a guide rail,

2:

a sectional perspective view of the external venetian blind with power dissipation system according to the figure 1 ,

3:

a schematic cross-sectional view through a guide rail with guide pins according to figure 1 ,

4:

a schematic perspective view of an external venetian blind with a power dissipation system with two guide rails,

5:

a sectional perspective view of the external venetian blind with power dissipation system according to the figure 4 ,

6:

a schematic perspective view of the two guide rails with guide pins according to FIG figure 4 ,

7:

a schematic view from below of the external venetian blind with power dissipation system according to FIG figure 4 ,

8:

a schematic cross-sectional view of the external venetian blind with current discharge system according to FIG figure 4 ,

9:

a schematic representation of an external venetian blind with power dissipation system and a first series connection of the slats,

10:

schematically simplified representation of the electrical series circuit of the external venetian blind according to figure 9 ,

11:

a schematic representation of an external venetian blind with power dissipation system and a further series connection of the slats, and

12:

schematically simplified representation of the electrical series connection of the external venetian blind according to figure 11 .

The Figures 1 to 3 each show different representations of an external venetian blind with a power dissipation system with a single guide rail 1 on one side.

In the figure 1 a schematic perspective view is shown, only two slats 7 and the guide rail 1 being shown for a better overview. A photovoltaic element is arranged on each of the slats 7, which generates electricity during operation, which is discharged by means of the current discharge system according to the invention via the guide rail 1 to the power grid or a power storage device. A guide pin 10 , 20 is formed on the longitudinal sides of the slats 7 and is movably mounted in the guide rail 1 . The guide rail 1 has a longitudinal opening 3 for the guide bolts 10,20. Both guide pins 10, 20 are arranged in one guide rail 1 one above the other. Both sides of the shading device or both longitudinal ends of the slats with one guide rail on both sides are of the same design.

Two busbars 4 are arranged opposite one another in the guide rail 1 . The guide pins 10, 20 each have a contact means 11, 21, which on the one hand an electrical connection 6 to the Photovoltaic element of the respective lamella 7 and on the other hand forms the electrical contact to the busbars 4 . The two busbars 4 are at the same potential.

In the figure 2 a sectional perspective view is shown. The guide bolts 10, 20 are of the same length and are positioned one below the other in one guide rail 1.

The contact means 11, 21 each have an elongated pin 12, 22. The guide pin 10, 20 forms a shaft aligned in the longitudinal direction of the slat 7 or the guide pin 10, 20, which insulates the internal electrically conductive pin 12, 22 from the outside, in particular from the guide rail 1 in the area of its longitudinal opening 3. At the end of the pin 12, 22 positioned in the guide rail 1, an enlarged, circular disk-like head 13, 23 is formed. The pin 12, 22 and the head 13, 23 are T-shaped in longitudinal cross section. The head 13, 23 of the contact means 11, 22 rests on both sides of the busbar 4, with the two busbars 4 being at the same potential.

In the figure 3 is a schematic cross-sectional view through a guide rail 1 and through a guide pin 10 according to FIG figure 1 shown. The busbars 4 are designed as flat copper bars or strips and extend over the entire height of the guide rail 1. In order to ensure permanent contact between the busbar 4 and the head 13, the busbars 4 are spring-mounted in the guide rail 1. For this purpose, an additional insert 2 is introduced between the busbar 4 and the guide rail 1, which has two spring legs 2a on its side facing away from the busbar 4, which are prestressed in such a way that the busbar 4 is in the middle of the guide rail 1 in the direction of the head 13 is pressed.

The guide rail 1 has a longitudinal opening 3 through which the guide pins 10, 20 protrude. Piping-like plastic inserts 5 are formed on both sides along the longitudinal opening 3, which on the one hand ensure less sliding friction of the guide bolts 10 along the longitudinal opening 3 and on the other hand additionally isolate the guide rail 1 from the guide bolts 10, 20 or the pins 12, 22.

Furthermore, it is easy to see that the round, disc-shaped head 13 is narrower than the busbar 4 when viewed in the longitudinal direction, so that changes in the length of the lamella 7 due to temperature fluctuations are compensated for.

The Figures 4 to 8 each show different representations of an external venetian blind with a power dissipation system with two guide rails 1a, 1b on each side. In the following, only the differences between the two versions will be discussed. Otherwise, the same components are identified by the same reference symbols.

In the figure 4 a schematic perspective view is shown, only two slats 7 and the two guide rails 1a, 1b being shown for a better overview. The two guide rails 1a, 1b are arranged one behind the other in the longitudinal direction of the slats 7 and have a common longitudinal opening 3a for the guide bolts 10, 20. The guide pin 20 of the lower slat 7 protrudes through the longitudinal opening 3a, first through the right or inner guide rail 1a and through a further longitudinal opening 3b into the left or outer guide rail 1b, where it is movably mounted. The guide rails 1a, 1b are thus integrated with one another as one component. Two busbars 4 are arranged in each of the guide rails 1a, 1b.

In the figure 5 a sectional perspective view is shown. Here it is easy to see that the guide pins 10, 20 are of different lengths, so that with the same configuration of the slats 7, the upper guide pin 10 extends into the guide rail 1a arranged further inwards, while the lower guide pin 20 is longer and extends into the further to reach outside arranged guide rail 1b.

The contact means 11, 21 are of the same design in both embodiments except for the length of the pins 12, 22. The head 13 of the contact means 11 of the upper lamella 7 is arranged in the first guide rail 1a and rests on both sides of a busbar 4, the two busbars 4 of this one guide rail 1a being at the same potential. The head 23 of the other contact means 21 of the lower lamella 7 protrudes through the first guide rail 1a into the second guide rail 1b and rests on both sides of a busbar 4, with the two busbars 4 of this other guide rail 1b are at a different potential than the busbars 4 of the first guide rail 1a.

In the figure 6 a schematic perspective view of the two guide rails 1a, 1b with the guide bolts 10, 20 is shown. The busbars 4 are also designed as flat copper bars or strips and extend over the entire height of the guide rails 1a, 1b. In order to ensure permanent contact between the busbar 4 and the head 13, 23, the busbars 4 are resiliently mounted in the guide rails 1a, 1b here as well.

The two guide rails 1a, 1b have a common longitudinal opening 3a through which the two guide pins 10, 20 protrude. Piping-like plastic inserts 5 are formed on both sides along the longitudinal opening 3a.

Furthermore, the round, disk-shaped heads 13, 23 of the contact means 11, 21 are narrower than the busbars 4 viewed in the longitudinal direction of the slats 7, so that changes in the length of the slats 7 due to temperature fluctuations are compensated for.

In the figure 7 a schematic bottom view is also shown. The longitudinal openings 3a, 3b through which the guide bolts 10, 20 protrude into the guide rails 10, 20 can be seen. The guide pin 20 is fastened to the underside of the lower lamella 7 and has an electrical connection 6 to the photovoltaic element arranged on the upper side of the lamella 7 .

In the figure 8 a schematic cross-sectional view is also shown. You can see the longitudinal ends of the slats 7 with the guide bolts 10, 20 of different lengths. The guide bolt 10 of the upper slat 7 is shorter and protrudes only through the first, outer longitudinal opening 3a into the first right or inner guide rail 1a, where the head 13 contacted the two busbars 4. The guide bolt 20 of the lower slat 7 is longer and protrudes through the first, outer longitudinal opening 3a and through the first guide rail 1a through the second, inner longitudinal opening 3b to the second left or outer guide rail 1b, where the head 23 connects the two busbars 4 contacted.

The figure 9 shows an inventive embodiment of the upper part of an external venetian blind with a slat box 8 and a curtain whose slats 7.1 and 7.2 are provided with photovoltaic elements which are connected to one another in sets in series and each form a set of slats 7. In this case, photovoltaic elements of the slats are connected in sets to the busbars 4+ and 4- for current discharge, with one connection of the photovoltaic elements to the busbar 4.z being established for each set in such a way that a total of each set of slats 7 has a serial connection between the photovoltaic elements of the two slats 7.1 and 7.2 arises and thus the voltage U1 and U2 generated with the photovoltaic elements is added to a total voltage Uges and is doubled in the ideal case. How from the figure 9 As can be seen, the busbar for the intermediate potential 4z runs on one side on the left in one guide rail 1, while the two current discharge rails 4+ and 4- run in the right-hand guide rail 1.

For a clearer presentation, the schematic electrical circuit of the photovoltaic elements mounted on the slats 7.1 and 7.1 is shown in FIG figure 9 again in the figure 10 shown. In this case, the negative or grounded busbar 4- is arranged on the left, from which derivatives lead to the respective first lamella 7.1 of a lamella set 7. The first and second laminations 7.1 and 7.2 are connected together and with reversed polarity to the busbar 4.z, a common intermediate potential of the voltage U1 being present there between the respective first and second laminations 7.1 and 7.2. The respective second slats 7.2 are then connected to the positive side of their photovoltaic elements with their voltage U2 to the busbar 4+, with a total voltage Uges=U1+U2 being generated between the busbars 4- and 4+. The two busbars 4+ and 4- serve to carry away current with the potential of the total voltage Uges and combine the total power output of the external venetian blind according to the invention.

The external venetian blind according to the invention thus consists of a large number of slat sets 7 connected in parallel from slats 7.1 and 7.2 connected in series, the intermediate potential between all the first slats 7.1 and all second slats 7.2 being connected to one another.

Another embodiment of the external venetian blind according to the invention provides that three slats 7.1, 7.2 and 7.3 of a set of slats 7 are connected in series and the sets of slats 7 of the entire external venetian blind are connected in parallel and the first, second and third slats 7.1, 7.2 and 7.3 are connected to one another in parallel . Such an embodiment is exemplified in figure 11 shown. This shows the upper part of an external venetian blind with a slat box 8 with laterally arranged guide rails 1 designed according to the invention and three sets of slats 7. Each set of slats 7 contains a first, second and third slat 7.1, 7.2 and 7.3, each with a photovoltaic element arranged thereon. A busbar 4+ and 4- is arranged on the right and left in the guide rails, which on the one hand is connected to an external power connection and on the other hand electrically connects the sets of laminations 7 . In addition, a busbar 4.z is arranged in each of the lateral guide rails 1, which connects the individual slats 7.1 with 7.2 and 7.2 with 7.3 in series and at the same time all first slats 7.1, all second slats 7.2 and all third slats 7.3 in parallel.

A schematic representation of this electrical circuit from the figure 11 is in the figure 12 shown. There are four sets of slats 7, each consisting of the three slats 7.1 to 7.3. These three slats 7.1, 7.2 and 7.3 are connected to one another in series for each set of slats 7. At the same time, the sets of laminations are each connected in parallel via busbars 4- and 4+. In addition, there is also a parallel connection to the same intermediate potentials of the individual slats 7.1 and 7.2 via the two busbars 4.z, with these busbars 4.z each being designed to be insulated from the outside. In this way, the operating voltage Uges achieved can be increased to the sum of the individual voltages U1+U2+U3 of the first, second and third segments 7.1, 7.2 and 7.3 in order to keep transmission losses as low as possible. At the same time, the power output of the slat sets 7 is added up according to their number in the external venetian blind.

Overall, the invention therefore proposes a power removal system for a shading device with a large number of slats, which are each movably mounted by means of guide bolts in at least one lateral guide rail, the shading device having photovoltaic elements for generating electricity, which are electrically connected to the guide bolts of the respective slat , wherein there are at least two electrical busbars in the at least one guide rail, so that there is electrical contact with the photovoltaic elements of the slats in order to dissipate the electricity generated. Furthermore, a shading device with a large number of slats, each with at least one photovoltaic element for generating electricity, is proposed, with a current discharge system according to the invention being present for dissipating the generated current.

Although the invention has been illustrated and described in detail by the preferred embodiment, the invention is not limited by the disclosed examples and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention. In particular, the invention is not limited to the specified combinations of features, but other combinations and sub-combinations that are obviously executable for the person skilled in the art can also be formed from the disclosed features. Embodiments are therefore also to be regarded as included and disclosed by the invention which are not explicitly shown or explained in the figures, but which result from the explained embodiments and can be generated by means of separate combinations of features. Likewise, it is also within the scope of the invention to cause a mechanical reversal of the functions of the individual mechanical elements of the invention.

1. I. Stromabführungssystem für eine Beschattungseinrichtung, insbesondere einen Raffstore oder eine Jalousie, mit einer Vielzahl von Lamellen (7), welche jeweils mittels Führungsbolzen (10, 20) in mindestens einer seitlichen Führungsschiene (1, 1a, 1b) beweglich gelagert sind, wobei die Beschattungseinrichtung Photovoltaikelemente zur Stromerzeugung aufweist, welche mit den Führungsbolzen (10, 20) der jeweiligen Lamelle (7) elektrisch verbunden sind, wobei
   in der mindestens einen Führungsschiene (1, 1a, 1b) insgesamt mindestens zwei elektrische Sammelschienen (4) vorliegen, sodass ein elektrischer Kontakt mit den Photovoltaikelementen der Lamellen (7) vorliegt, um den erzeugten Strom abzuführen.
2. II. Stromabführungssystem gemäß dem voranstehenden Ausführungsbeispiel I, dadurch gekennzeichnet, dass zwei seitliche Führungsschienen (1, 1a, 1b) ausgebildet sind und in den beiden Führungsschienen (1, 1a, 1b) insgesamt mindestens zwei elektrische Sammelschienen (4) vorliegen.
3. III. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis II, dadurch gekennzeichnet, dass ein Führungsbolzen (10, 20) mindestens ein Kontaktmittel (11, 21) aufweist, welches den elektrischen Kontakt zur Sammelschiene (4) ausbildet.
4. IV. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis III, dadurch gekennzeichnet, dass das mindestens eine Photovoltaikelement einer Lamelle (7) mit dem mindestens einen Kontaktmittel (11, 21) elektrisch verbunden ist.
5. V. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis IV, dadurch gekennzeichnet, dass jeder Führungsbolzen (10, 20) einer Lamelle (7) genau ein Kontaktmittel (12, 21) aufweist, wobei das eine Kontaktmittel (21, 21) im Betrieb eine oder zwei Sammelschienen (4) gleichen Potentials kontaktiert.
6. VI. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis V, dadurch gekennzeichnet, dass die Führungsschiene (1, 1a, 1b) genau eine Sammelschiene (4) aufweist.
7. VII. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis V, dadurch gekennzeichnet, dass die Führungsschiene (1, 1a, 1b) genau zwei Sammelschienen (4) aufweist.
8. VIII. Stromabführungssystem gemäß dem voranstehenden Ausführungsbeispiel VII, dadurch gekennzeichnet, dass die zwei Sammelschienen (4) im Betrieb auf gleichem Potential liegen.
9. IX. Stromabführungssystem gemäß dem voranstehenden Ausführungsbeispiel VII, dadurch gekennzeichnet, dass die zwei Sammelschienen (4) im Betrieb auf unterschiedlichem Potential liegen.
10. X. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis IV, dadurch gekennzeichnet, dass jeder Führungsbolzen (10, 20) einer Lamelle (7) zwei Kontaktmittel (11, 21) aufweist, wobei die Kontaktmittel (11,2 21) jeweils eine Sammelschiene (1, 1a, 1b) kontaktieren, wobei die Sammelschienen (1, 1a, 1b) im Betrieb unterschiedliches Potential aufweisen.
11. XI. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis X, dadurch gekennzeichnet, dass der elektrische Kontakt zwischen Sammelschiene (7) und Kontaktmittel (11, 21) eine Andruckfederung aufweist.
12. XII. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XI, dadurch gekennzeichnet, dass die mindestens eine Sammelschiene (4) als Flachband oder Flachstange aus einem Metall oder einer Legierung ausgebildet ist.
13. XIII. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XII, dadurch gekennzeichnet, dass die mindestens eine Sammelschiene (4) als elektrisch leitende Bürste ausgebildet ist.
14. XIV. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XIII, dadurch gekennzeichnet, dass das mindestens eine Kontaktmittel (11, 21) als elektrisch leitender Stift (12, 22) ausgebildet ist, welcher in dem nicht-leitenden Führungsbolzen (10, 20) steckt und einen vergrößerten Kopf (13, 23) zum Kontaktieren der mindestens einen Sammelschiene (4) aufweist.
15. XV. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XIV, dadurch gekennzeichnet, dass die Führungsschiene (1, 1a, 1b) derart ausgebildet ist, dass eine temperaturbedingte Längenänderung der Lamelle (7) in der Führungsschiene (1, 1a, 1b) kompensiert werden kann.
16. XVI. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XV, dadurch gekennzeichnet, dass auf jeder Seite der Beschattungseinrichtung zwei Führungsschienen (1, 1a, 1b) ausgebildet sind, wobei die Führungsbolzen (10, 20) benachbarter Lamellen (7) auf jeder Seite abwechselnd in den beiden Führungsschienen (1, 1a, 1b) angeordnet sind.
17. XVII. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XVI, dadurch gekennzeichnet, dass in die Längsöffnungen (3, 3a, 3b) der mindestens einen Führungsschiene (1, 1a, 1b) zumindest abschnittsweise Gummidichtungen und/oder Bürstendichtungen eingesetzt sind.
18. XVIII. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XVII, dadurch gekennzeichnet, dass zwischen den Führungsbolzen (10, 20) benachbarter Lamellen (7) jeweils ein Stoffeinsatz angeordnet ist, welcher im heruntergelassenen Zustand der Lamellen (7) die Längsöffnungen (3, 3a, 3b) der mindestens einen Führungsschiene (1, 1a, 1b) zumindest teilweise abdeckt.
19. XIX. Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XVIII, dadurch gekennzeichnet, dass mehrfach jeweils mindestens zwei Lamellen (7.1, 7.2, 7.3) untereinander seriell elektrisch zu jeweils einem Lamellensatz (7) verbunden sind, wobei die Verbindungsstellen (9) zwischen den Lamellen (7.1 mit 7.2 und 7.2 mit 7.3) untereinander parallel über jeweils eine Sammelschiene (4.z) elektrisch gekoppelt sind.
20. XX. Stromabführungssystem gemäß dem voranstehenden Ausführungsbeispiel XIX, dadurch gekennzeichnet, dass je Lamellensatz (7) genau zwei seriell geschaltete Lamellen (7.1, 7.2) vorliegen, wobei:
    • die potentialgleichen Verbindungsstellen (9) zwischen der jeweils ersten Lamelle (7.1) und der zweiten Lamelle (7.2) über eine Sammelschiene (4.z) auf einer ersten Seite der Beschattungseinrichtung elektrisch verbunden sind, und
    • jeder Lamellensatz (7) an die positiven und negativen Sammelschienen (4+, 4-) auf der zur ersten Seite gegenüberliegenden zweiten Seite der Beschattungseinrichtung elektrisch angeschlossen sind, wobei die Polarität (+, -) der Lamellen in der Beschattungseinrichtung von oben nach unten alternierend ausgeführt ist.
21. XXI. Stromabführungssystem gemäß dem voranstehenden Ausführungsbeispiel XIX, dadurch gekennzeichnet, dass je Lamellensatz (7) genau drei seriell geschaltete Lamellen (7.1, 7.2, 7.3) vorliegen, wobei:
    • die potentialgleichen Verbindungsstellen (9) zwischen der jeweils ersten Lamelle (7.1) und der zweiten Lamelle (7.2) über eine erste Sammelschiene (4.z) auf einer ersten Seite der Beschattungseinrichtung elektrisch verbunden sind,
    • die potentialgleichen Verbindungsstellen (9) zwischen der jeweils zweiten Lamelle (7.2) und der dritten Lamelle (7.3) über eine zweite Sammelschiene (4.z) auf einer zweiten - der ersten Seite gegenüberliegenden - Seite der Beschattungseinrichtung elektrisch verbunden sind,
    • jeder Lamellensatz (7) an eine positive Sammelschiene (4+) und eine negative Sammelschiene (4-) auf jeweils einer Seite der Beschattungseinrichtung elektrisch angeschlossen ist.
22. XXII. Beschattungseinrichtung, insbesondere ein Raffstore oder eine Jalousie, zumindest aufweisend einen Behang mit einer Vielzahl von Lamellen (7), welche jeweils mittels Führungsbolzen (10, 20) in mindestens einer seitlichen Führungsschiene (1, 1a, 1b) beweglich gelagert sind und jeweils mindestens ein Photovoltaikelement zur Stromerzeugung aufweisen, dadurch gekennzeichnet, dass
    zur Abführung des erzeugten Stromes ein Stromabführungssystem gemäß einem der voranstehenden Ausführungsbeispiele I bis XXI vorliegt.
23. XXIII. Beschattungseinrichtung gemäß dem voranstehenden Ausführungsbeispiel XXII, dadurch gekennzeichnet, dass der Behang zumindest ein erstes Lamellenpaket und ein zweites Lamellenpaket umfasst, wobei die Lamellenpakete unterschiedlich um die jeweiligen Längsachsen der Lamellen gekippt werden können.

Particularly favorable variations of exemplary embodiments of the invention described above are described below:

1. I. Current dissipation system for a shading device, in particular an external venetian blind or a venetian blind, with a large number of slats (7), which are each movably mounted by means of guide bolts (10, 20) in at least one lateral guide rail (1, 1a, 1b), the Has shading device photovoltaic elements for power generation, which are electrically connected to the guide bolts (10, 20) of the respective slat (7), wherein
   in the at least one guide rail (1, 1a, 1b) there are a total of at least two electrical busbars (4), so that there is electrical contact with the photovoltaic elements of the slats (7) in order to dissipate the electricity generated.
2. II. Current removal system according to the above exemplary embodiment I, characterized in that two lateral guide rails (1, 1a, 1b) are formed and in the two guide rails (1, 1a, 1b) there are at least two electrical busbars (4).
3. III. Current removal system according to one of the preceding exemplary embodiments I to II, characterized in that a guide pin (10, 20) has at least one contact means (11, 21) which forms the electrical contact with the busbar (4).
4. IV. Current removal system according to one of the preceding exemplary embodiments I to III, characterized in that the at least one photovoltaic element of a lamella (7) is electrically connected to the at least one contact means (11, 21).
5. V. Current dissipation system according to one of the preceding exemplary embodiments I to IV, characterized in that each guide pin (10, 20) of a slat (7) has exactly one contact means (12, 21), with one contact means (21, 21) having a or contacted two busbars (4) of the same potential.
6. VI. Current removal system according to one of the preceding exemplary embodiments I to V, characterized in that the guide rail (1, 1a, 1b) has precisely one busbar (4).
7. VII. Current removal system according to one of the preceding exemplary embodiments I to V, characterized in that the guide rail (1, 1a, 1b) has exactly two busbars (4).
8. VIII. Current removal system according to the preceding exemplary embodiment VII, characterized in that the two busbars (4) are at the same potential during operation.
9. IX. Current removal system according to the preceding exemplary embodiment VII, characterized in that the two busbars (4) are at different potentials during operation.
10. X. Current removal system according to one of the preceding exemplary embodiments I to IV, characterized in that each guide pin (10, 20) of a slat (7) has two contact means (11, 21), the contact means (11, 2 21) each having a busbar ( 1, 1a, 1b), the busbars (1, 1a, 1b) having different potentials during operation.
11. XI. Current dissipation system according to one of the preceding exemplary embodiments I to X, characterized in that the electrical contact between the busbar (7) and the contact means (11, 21) has a compression spring.
12. XII. Current removal system according to one of the preceding exemplary embodiments I to XI, characterized in that the at least one busbar (4) is designed as a flat strip or flat bar made from a metal or an alloy.
13. XIII. Current removal system according to one of the preceding exemplary embodiments I to XII, characterized in that the at least one busbar (4) is designed as an electrically conductive brush.
14. XIV. Current removal system according to one of the preceding exemplary embodiments I to XIII, characterized in that the at least one contact means (11, 21) is designed as an electrically conductive pin (12, 22) which is inserted in the non-conductive guide bolt (10, 20). and an enlarged head (13, 23) for contacting the at least one busbar (4).
15. XV. Current dissipation system according to one of the preceding exemplary embodiments I to XIV, characterized in that the guide rail (1, 1a, 1b) is designed in such a way that a temperature-related change in length of the lamella (7) in the guide rail (1, 1a, 1b) can be compensated.
16. XVI Current dissipation system according to one of the preceding exemplary embodiments I to XV, characterized in that two guide rails (1, 1a, 1b) are formed on each side of the shading device, with the guide bolts (10, 20) of adjacent slats (7) on each side alternating in the both guide rails (1, 1a, 1b) are arranged.
17. XVIII. Current removal system according to one of the preceding exemplary embodiments I to XVI, characterized in that rubber seals and/or brush seals are inserted at least in sections into the longitudinal openings (3, 3a, 3b) of the at least one guide rail (1, 1a, 1b).
18. XVIII. Current removal system according to one of the preceding exemplary embodiments I to XVII, characterized in that between a fabric insert is arranged on each of the guide bolts (10, 20) of adjacent slats (7), which at least partially covers the longitudinal openings (3, 3a, 3b) of the at least one guide rail (1, 1a, 1b) when the slats (7) are in the lowered state .
19. XIX. Current dissipation system according to one of the preceding exemplary embodiments I to XVIII, characterized in that at least two lamellae (7.1, 7.2, 7.3) are electrically connected to one another in series to form a lamellae set (7), the connection points (9) between the lamellae (7.1 with 7.2 and 7.2 with 7.3) are electrically coupled to one another in parallel via a respective busbar (4.z).
20. XX Power dissipation system according to the preceding exemplary embodiment XIX, characterized in that there are exactly two series-connected lamellae (7.1, 7.2) for each lamella set (7), with:
    • the equipotential connection points (9) between the respective first slat (7.1) and the second slat (7.2) are electrically connected via a busbar (4.z) on a first side of the shading device, and
    • each set of slats (7) are electrically connected to the positive and negative bus bars (4+, 4-) on the second side of the shading device opposite the first side, the polarity (+, -) of the slats in the shading device alternating from top to bottom is executed.
21. XXI. Current dissipation system according to the preceding exemplary embodiment XIX, characterized in that there are exactly three series-connected lamellae (7.1, 7.2, 7.3) for each lamella set (7), with:
    • the equipotential connection points (9) between the respective first slat (7.1) and the second slat (7.2) are electrically connected via a first busbar (4.z) on a first side of the shading device,
    • the equipotential connection points (9) between the respective second slat (7.2) and the third slat (7.3) are electrically connected via a second busbar (4.z) on a second side of the shading device - opposite the first side,
    • each fin set (7) to a positive busbar (4+) and a negative busbar (4-) is electrically connected on each side of the shading device.
22. XXII. Shading device, in particular an external venetian blind or a venetian blind, at least having a hanging with a large number of slats (7), which are each movably mounted by means of guide bolts (10, 20) in at least one lateral guide rail (1, 1a, 1b) and each have at least one Have photovoltaic element for power generation, characterized in that
    a current discharge system according to one of the above exemplary embodiments I to XXI is present for dissipating the current generated.
23. XXIII. Shading device according to the above exemplary embodiment XXII, characterized in that the curtain comprises at least a first set of slats and a second set of slats, the slat sets being able to be tilted differently about the respective longitudinal axes of the slats.

Reference List

1

guide rail

1a

right, inner guide rail

1b

left, outer guide rail

2

Mission

2a

struts

3

longitudinal opening

3a

first, outer longitudinal opening

3b

second, inner longitudinal opening

4

busbar

4+

positive busbar

4-

negative busbar

4.z

Busbar for intermediate potential

5

piping insert

6

Connection between contact means and photovoltaic element

7

Louvers with photovoltaic elements

7.1

first slat with photovoltaic element of a serial set of slats

7.2

second slat with photovoltaic element of a serial set of slats

7.3

third slat with photovoltaic element of a serial set of slats

8th

slat box

9+

positive busbar

9-

negative busbar

10, 20

guide pin

11, 21

contact means

12, 22

Pen

13, 23

Head

Claims (15)

Power dissipation system for a shading device, in particular an external venetian blind or a venetian blind, with a large number of slats (7), which are each movably mounted by means of guide bolts (10, 20) in at least one lateral guide rail (1, 1a, 1b), the shading device having photovoltaic elements for generating electricity, which are electrically connected to the guide bolts (10, 20) of the respective lamella (7), wherein
in the at least one guide rail (1, 1a, 1b) there are a total of at least two electrical busbars (4), so that there is electrical contact with the photovoltaic elements of the slats (7) in order to dissipate the electricity generated, 1.1. two lateral guide rails (1, 1a, 1b) are formed and there are a total of at least two electrical busbars (4) in the two guide rails (1, 1a, 1b), and 1.2. a guide bolt (10, 20) has at least one contact means (11, 21) which forms the electrical contact to the busbar (4),
characterized in that 1.3. the at least one contact means (11, 21) is designed as an electrically conductive pin (12, 22) which is inserted in the non-conductive guide bolt (10, 20) and has an enlarged head (13, 23) for contacting the at least one busbar ( 4), wherein the electrical contacting of the busbar (4) takes place perpendicularly to the longitudinal direction of the guide pin (10, 20), and 1.4. the electrical contact between the busbar (7) and the head (13, 23) has spring pressure so that a spring force presses the busbar (7) and the head (13, 23) together perpendicularly to the longitudinal direction of the guide pin (10, 20). Current dissipation system according to the preceding claim 1, characterized in that each guide pin (10, 20) of a slat (7) has exactly one contact means (12, 21), one contact means (21, 21) being one or two busbars (4th ) contacted the same potential. Current removal system according to one of the preceding claims 1 to 2, characterized in that the guide rail (1, 1a, 1b) has exactly one busbar (4). Current removal system according to one of the preceding claims 1 to 2, characterized in that the guide rail (1, 1a, 1b) has exactly two busbars (4). Current removal system according to the preceding patent claim 3, characterized in that the two busbars (4) are at the same potential during operation. Current removal system according to the preceding patent claim 3, characterized in that the two busbars (4) are at different potentials during operation. Current removal system according to the preceding claim 1, characterized in that each guide pin (10, 20) of a slat (7) has two contact means (11, 21), the contact means (11, 2 21) each having a busbar (1, 1a, 1b ) contact, wherein the busbars (1, 1a, 1b) have different potentials during operation. Current removal system according to one of the preceding claims 1 to 7, characterized in that the guide rail (1, 1a, 1b) is designed in such a way that a temperature-related change in length of the lamella (7) in the guide rail (1, 1a, 1b) can be compensated. Current dissipation system according to one of the preceding claims 1 to 8, characterized in that two guide rails (1, 1a, 1b) are formed on each side of the shading device, with the guide bolts (10, 20) of adjacent slats (7) on each side alternating in the both guide rails (1, 1a, 1b) are arranged. Current removal system according to one of the preceding claims 1 to 9, characterized in that the longitudinal openings (3, 3a, 3b) of the at least one guide rail (1, 1a, 1b) rubber seals and/or brush seals are used at least in sections. Current dissipation system according to one of the preceding claims 1 to 10, characterized in that at least two lamellae (7.1, 7.2, 7.3) are electrically connected to each other in series to form a lamellae set (7), the connection points (9) between the lamellae (7.1 with 7.2 and 7.2 with 7.3) are electrically coupled to one another in parallel via a respective busbar (4.z). Current dissipation system according to the preceding claim 11, characterized in that there are exactly two series-connected lamellae (7.1, 7.2) for each lamella set (7), with: - the equipotential connection points (9) between the respective first slat (7.1) and the second slat (7.2) are electrically connected via a busbar (4.z) on a first side of the shading device, and - each slat set (7) is electrically connected to the positive and negative busbars (4+, 4-) on the second side of the shading device opposite the first side, the polarity (+, -) of the slats in the shading device being from top to bottom is performed alternately. Current dissipation system according to the preceding claim 11, characterized in that there are exactly three series-connected lamellae (7.1, 7.2, 7.3) for each lamella set (7), with: - the equipotential connection points (9) between the respective first slat (7.1) and the second slat (7.2) are electrically connected via a first busbar (4.z) on a first side of the shading device, - the equipotential connection points (9) between the respective second slat (7.2) and the third slat (7.3) are electrically connected via a second busbar (4.z) on a second side of the shading device - opposite the first side, - Each set of slats (7) is electrically connected to a positive busbar (4+) and a negative busbar (4-) on either side of the shading device. Shading device, in particular an external venetian blind or a venetian blind, at least having a hanging with a large number of slats (7), which are each movably mounted by means of guide bolts (10, 20) in at least one lateral guide rail (1, 1a, 1b) and each have at least one Have photovoltaic element for power generation, characterized in that
a current discharge system according to one of the preceding patent claims 1 to 13 is present for dissipating the current generated. Shading device according to the preceding claim 14, characterized in that the curtain comprises at least a first set of slats and a second set of slats, wherein the slat sets can be tilted differently about the respective longitudinal axes of the slats.

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