DE202011102874U1 - Sun protection device with solar element - Google Patents

Abstract

Sun protection device with a solar element, comprising a support element (2) and a solar module (6), characterized in that the support element (2) on the side facing the sun comprises a recess (3) for receiving the solar module (6) and the solar module (6) in Is essentially flush with the sun-facing surface in the recess (3).

Description

Field of application of the invention

The present invention relates to a solar protection device with solar element for generating electrical energy. Such sun protection devices, also called Louver, are well known in the building industry and are used in building technology as shading elements. Louver provide a good outer sun protection and can be found both on facades, as well as in superimposed manner on buildings or facades. In the course of the ever-increasing scarcity of raw materials and the increasing demand for energy, alternative energy sources are increasingly gaining ground, which are also known as so-called "renewable energies". A part of these renewable energies is the solar technology, which can transform the energy flow of the sun radiated on the earth into other forms of energy, like electric current and heat. To use this energy to a large extent, installations with solar modules on roofs and / or façade surfaces are well known. In order to cover the energy demand of a building at least proportionately regeneratively, newly planned buildings or buildings to be modernized can be equipped with one or more solar protection devices with solar elements. Such a sun protection device with a solar element can thus contribute significantly to the generation of energy, both self-sufficient as a single installation, as well as in connection with already installed solar modules on the roof or on the wall.

State of the art

An embodiment of a shading element is known from DE 4302883 known, which describes a photovoltaic shading device with glass fins, wherein the flat glass fins are provided with translucent photovoltaic modules. The glass fins, which are also used here as shading element, have a transmission value of 10-20% to let a portion of the light in the interior, here, however, solar rays are reflected so that not the full radiant energy is available for the solar cell. An elaborate motor control leads the lamellae to the position of the sun, in order to avoid shading.

Another embodiment is known from DE 10 2008 014 561 A1 known, in which a connection element for a sunshade is described, which is provided with a flexible solar module. The connection element is in this case formed monolithically with the carrier element and holds the solar module with a profile strip overlapping the solar module. A disadvantage of this arrangement, however, is the formation of a heel between the top of the solar module and the profile part, so that it can come to this paragraph to moisture or dirt deposits. Dirt deposits reduce the active surface of the solar module and thus also the available power, since partial areas of the solar cells are shaded by such moisture or dirt deposits. Furthermore, moisture accumulations on the solar module can favor diffusion of moisture through the edge regions. Ingress of moisture can reduce the power output of the solar modules and even cause a total failure of the solar module. The electrical connection is arranged in this arrangement in a cavity in the region of the paragraph, therefore, costly protective measures must be taken to prevent ingress of moisture into the cavity.

From the DE 10 2004 025 954 A1 is a sunshade known which is designed as a blind. In this arrangement, flexible solar foils are mounted on the slats of the blind. Alternatively, the solar cells form the lamella. The lamellae with the solar foils attached thereto are protected only with the help of a plastic film, so that only a small protection against external weather conditions is given.

Summary of the invention

The invention is therefore based on the object, a sun protection device with solar element, hereinafter also called Louver with solar element to provide the type mentioned, with which a high degree of electrical energy can be provided and which is effectively protected against external weather and dirt ,

In addition, a particular object of the present invention is to achieve an improvement in the self-cleaning effect of a Louver.

Furthermore, a particular object of the present invention is to provide a solar element Louver that ensures good heat dissipation and improved cooling of the solar element.

Furthermore, it is a particular object of the present invention to provide a solar protection device with solar elements, which is inexpensive to manufacture and easy to assemble.

The above-mentioned objects and others of the following description Tasks are fulfilled by a sun protection device with solar element according to claim 1. Further advantageous embodiments of the present invention are the subject of the dependent claims.

In a first embodiment, the louver is provided with solar element, in this case in a wing-like support element on the sun-facing side with photovoltaic elements, or PV elements. The PV elements are located between a highly transparent, elastically moldable material on the sun-facing side and an elastically moldable material on the back of the solar module and are in a heat-activated, transparent plastic, eg. B. EVA, embedded on all sides. The plastic is also flexible and can be bent together with the highly transparent, moldable material on the sun-facing side and the moldable material on the back of the solar module. In the present specification, the invention is exemplified on a glass / glass solar module, wherein the solar cells are embedded between a front glass pane and a rear glass pane. However, the invention is not limited to the use of glass as a front and rear side member for a solar module. Thus, other elastically moldable materials, eg. As special plastics that meet the same requirements for high transparency and deformability on the sun-facing side and deformability of the back of the solar module can be used. The material on the back, however, does not claim to be transparent. The PV elements are preferably designed as so-called cell strings, wherein a plurality of strip-shaped thin-film solar cells is interconnected in a composite. The solar module is divided into an upper and a lower part. The upper part of the solar module comprises a front element, which consists of a highly transparent, elastically moldable material, for. As a flexible front glass pane, and embedded in the heat-activatable plastic PV elements, eg. B. cell strings. The lower part comprises the rear element of an elastically moldable material, for. B. a flexible glass. The glass pane in the lower part of the solar module has a larger area than the upper area of the solar module, so that the protruding areas can be used as fastening elements on the carrier element.

In particular, the solar module is particularly flexible and comprises not only one or more flexible PV elements, for example thin-film PV elements, but also flexible front and rear side elements, for example made of flexible glass or a transparent plastic.

The Louver is designed as a hollow support element. On the sun-facing side of the Louver, the support member has a recess in which a solar module is disposed on the substantially entire convex surface. The surface of the solar module is substantially flush with the surface of the Louvers. However, this does not mean that there is no spacing or groove between the surface of the Louver and the solar module. Rather, to compensate for thermal movements of the elements, a gap is provided which is filled with a suitable filling material, such as butyl material or silicone, so that then a smooth surface without gap is formed.

The large-area arrangement of the solar cells on the sun-facing side of the Louver allows high space utilization in the conversion of solar energy into electrical energy. The front glass pane of the solar module is arranged in the recess on the sun-facing side of the support member so that a substantially smooth surface is formed, which is aligned with the curvature of the sun-facing side of the support element and thereby also creates a visually homogeneous and aesthetic overall picture, which is the original Louverform corresponds. The solar module is in the planar state, i. e. in the non-bent state, inserted or inserted into the carrier element, so that the upper part of the solar module is positioned in the recess of the carrier element. The solar module is then bent under tension to the bending radius of the support member and the lower part of the solar module is fixed on the inside of the support member, preferably with an adhesive bond. To stabilize the solar module may additionally be a support structure between the underside of the solar module and the inside of the support member may be present. Particularly preferably, the solar module engages on the side facing away from the sun on at least two locations, the support element in the form that this can be secured, for example by means of an adhesive bond to the inside of the support member.

The front glass pane preferably has a transmission value of> 92%, in order to achieve a good absorption of solar radiation to the solar element. In addition, the front glass pane can still be provided with an antireflection coating in order to increase the absorption of solar radiation to the solar element.

The solar module is thus an integral part of the sun-facing surface of the support element. The front glass pane can also be colored or to match aesthetic appearance or to adapt to a building be provided with a print. The PV elements used are preferably made of thin-film solar cells, which are produced in a roll-to-roll process, wherein the individual ribbon solar cells can be produced in so-called cell strings of various sizes. The cell strings consist of a plurality of tailored, individual interconnected band solar cells. However, other suitable, flexible solar modules can be used.

The cross section of the Louvers is preferably lenticular, in particular biconvex lenticular, but may also be rectangular, triangular, semicircular or configured in any other suitable form.

The smooth, sun-facing surface of the Louver with solar element effectively prevents the accumulation of moisture, dirt or moss formation on the surface of the Louver and thus prevents performance in partial shading by dirt or moss formation. The convex, sun-facing surface of the Louver advantageously allows rapid drainage of rain, snow and dirt and thus provides a high degree of self-cleaning during operation, whereby cost-intensive cleaning of the Louver need not be performed so often.

In a further embodiment, the solar module z. B. prefabricated as glass / glass module first plan according to the prior art. In this case, a thermoplastic material, in particular an ionomer, is used as the embedding material for the solar cells. The plan prefabricated solar module is brought in a second step in one of the surface geometry of the sun-facing side of the Louver adapted shape by being first heated and held until cooling in this form, so that the achieved shape can be permanently maintained. The solar module can then simply be inserted into the recess in the Louver. The lower part of the solar module is fixed on the inside of the support element, preferably with an adhesive bond.

In a further embodiment, the PV elements in the solar module on the sun facing side of the Louver are arranged as individual separate PV elements on the substantially entire surface either parallel or orthogonal to the body axis of the Louver or in a mixture of all the aforementioned arrangements. In a partial shading of one or more of the separate PV elements in a series circuit can lead to the failure of the entire solar module, so that no more electrical energy is produced. The separate PV elements are electrically connected to prevent a failure in parallel and / or in a combination of series and parallel connection, so as to ensure a high efficiency and reliability of the solar modules. An arrangement with 2, 4, 6, 8, 10 or more PV elements can still convert a high proportion of solar energy on the non-shaded PV elements into electrical energy even with partial shading.

In another advantageous embodiment, the material of the carrier element itself or a special coating of the carrier element can enable a partial reflection, so as to supply building-proximate areas of the solar module with solar energy, which are shaded. The surface is provided on the underside of the Louver support member with a reflective surface that reflects the incident on the underside sunlight of the Louver support member and deflects to an adjacent, underlying Louver, so that a more homogeneous utilization of the solar module in z. B. partially shaded areas is achieved. In this arrangement, also back-reflected light, the z. B. reflected from clouds or from the ground can be used by the reflection on the back of a Louver on the solar element of an underlying Louver.

In a further embodiment of the solar protection device with a solar module, the support element is provided with ventilation openings to dissipate the heat occurring during operation of the solar control device with solar element heat from the interior of the Louver with solar element and to direct cooler outside air into the interior of the Louver with solar element. Since, as is known, the power of a solar module decreases with increasing temperature of the solar module, an improved performance at high outside temperatures or high irradiation powers can be achieved. In a first embodiment, the ventilation openings are arranged on the upper side and the lower side of the solar-powered Louver so that cool outside air can flow into the interior of the Louver and the warmer air can flow out by convection through the ventilation openings at the top of the support element. The end faces can also be equipped with ventilation openings, in addition to allow cool ambient air to flow into the interior of the Louver and to transport the solar module flowing past the heated air to the outside. Also, the ventilation openings can be divided into individual areas, eg. B. no ventilation openings in the region of the support element.

Ventilation openings have proved to be advantageous, which are spaced about 5 cm, other distances such as 3 cm or 1 cm from each other are conceivable. For architectural or aesthetic purposes are also arranged differently Ventilation openings conceivable. As a result, such Louver with solar element are very flexible and leave z. For example, an architect has a lot of freedom in designing and integrating into a building. The ventilation openings may in this case be formed from a multiplicity of geometric shapes. Thus, have proved to be advantageous oval, square, rectangular, and diamond-shaped openings. Other embodiments of the Louver with solar element with ventilation holes only near the building are also conceivable. On the back of the support member and / or on the support element cooling fins may be additionally attached, so as to achieve a further heat dissipation.

The Louver can be mounted in a conventional manner on the facade or any other desired position to a building.

Brief description of the figures

Other features and advantages of the present invention as well as the operation of the exemplary embodiment of the present invention will be described below with reference to the accompanying drawings.

The accompanying drawings illustrate the present invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

For the rest of the further description, the following definition applies: If a figure is included in a figure for the sake of graphic clarity, but not explained in the directly associated descriptive text, reference is made to its mention in the preceding figure descriptions.

In the interests of clarity, the repeated designation of components in subsequent figures is usually dispensed with, as long as the drawings clearly show that they are components already used in previous figures.

In the following, the invention will be described in more detail with reference to an embodiment shown in the drawing, without being limited thereto.

1 a sectional view of a Louver with solar element in mounted view according to an embodiment of the invention;

2 a sectional view of the Louver with solar element according to another embodiment of the invention;

3 a sectional view of the Louver with solar element according to another embodiment of the invention;

4 a sectional view of the Louver with solar element according to another embodiment of the invention;

5 a perspective view of the Louver with solar element off 1 ;

6 a perspective view of a Louver with solar element in assembled representation according to another embodiment of the invention.

Description of the preferred embodiments of the invention

With reference to 1 A presently preferred embodiment of a sun protection device with solar element, hereinafter also referred to as a Louver with solar element, according to the present invention will be described, generally with reference numerals 1 is designated. A Louver with solar element 1 comprises a first carrier element 2 which is substantially similar to a hollow aircraft wing and monolithic. The sun-facing area has a recess 3 the for receiving the solar module 6 serves. The solar module 6 is here on the substantially entire surface of the sun-facing side of the support element 2 arranged and completes with this flush. The solar module 6 is flexible and preferably produced in a thin-film process. The lower region of the carrier element 2 , which is defined as the sun-facing area in the mounted state, has a substantially convex surface. The carrier element 2 is hollow inside and is z. B. made of a metal, in particular aluminum, which is characterized by a low weight, has good mechanical and heat dissipating properties. However, other materials as a carrier material are also conceivable, such as. As weatherproof plastics or wood. The carrier elements 2 can be made of aluminum in a z. B. extrusion process cost-effectively and economically. The lower region of the carrier element 2 goes on his body axis 100 at both ends in a sun-facing first sub-element 4 and a second subelement 5 over, each having a curved shape. Between the open ends of the first subelement 4 and the second subelement 5 there is the recess 3 , which is the upper part of the solar module 6 receives. The upper part of the solar module is defined here as the part that consists of the PV element 6A and the front element laminated thereon 9A , z. B. a front glass pane exists. The upper part of the solar module 6 has smaller dimensions than the lower part of the solar module 6 that of the back element 9B , z. B. a glass pane, the solar module 6 is formed. The dimensions of the upper part of the solar module 6 that in the recess 3 can be used are less than the opening width of the recess 3 , so that there is a gap between the outer edges of the upper part of the solar module 6 and the edges 7 . 8th the carrier element 2 forms. On the one hand, this gap enables easy insertion of the solar module 6 in the recess 3 and on the other hand allows temperature-induced changes in length of the front glass pane 9A and / or the carrier element 2 , the tension on the front glass pane 9A exercise, balance. The gap is then filled with a suitable filler material, for example a butyl material or silicone, to protect against weathering and to form a smooth surface. The permanently elastic sealing material advantageously allows temperature-induced material expansion of the carrier element 2 or the front glass pane 9A be compensated. The solar module 6 is in the range of a first inside 10 and a second inside 12 the carrier element 2 attached. The back glass pane 9B is with the protruding ends that over the area of the upper part of the solar module 6 on a first inside 10 at a first junction 11 and a second inside 12 at a second connection point 13 the carrier element 2 that of the recess 3 are adjacent, glued flat. In assembled form, this creates a homogeneous, even surface on the sun-facing side, extending from the body axis 100 convex over the subelement 4 that in the recess 3 embedded domed solar module 6 and about the subelement 5 extends.

2 shows a further embodiment of the Louver with solar element 1 in which a support element 14 in the interior of the support element 2 between a part of the inner surface of the carrier element 2 and the solar module 6 is arranged so as to the solar module 6 in its shape the outer course of the support element 2 between the first subelement 4 and the second subelement 5 at the same time permanently fixing it in its position and arched shape. The support element 14 is essentially a double T-shaped element with a bottom part 15 attached to the inside of the underside of the support element 2 is applied. At the bottom part 15 closes a cross element 16 on, perpendicular to the bottom part 15 stands. To the cross element 16 closes a headboard 17 in the installation position with the headboard 17 large area on the solar module 6 is applied. The bottom part 15 and the headboard 17 are substantially arched to the same extent as the curvature of the support element 2 , The support element 14 can advantageously consist of a metal with high thermal conductivity, are particularly well suited for. As aluminum or an aluminum alloy, or similar materials. For better heat dissipation, the support element 14 and / or the sun-remote side of the support element 2 also be provided with cooling fins (not shown). The cooling fins provide for an increase in the surface area and thus for better heat dissipation, since the power of a solar module is known to increase with heat, for. B. at high ambient temperatures, decreases.

The support element 14 may be designed as a monolithic element, which is on the substantially entire length in the interior of the support element 2 for supporting the solar module 6 serves. However, it is also possible the solar module 6 with the help of separate support elements 14 which are spaced apart and which are between the solar module 6 and the inner surface of the lower part of the support member 2 be used to support.

3 shows a further embodiment of the Louver with solar element 1 out 1 in which the carrier element 2 Has ventilation openings. A plurality of first vents 18 can on the side facing away from the sun of the support element 2 be arranged so that cool ambient air can enter and so the solar module 6 can cool, as in the operation of the Louver with solar element 1 very easy to reach temperatures above 50 ° C. At a temperature increase of the solar module 6 It is known that the efficiency of solar cells decreases. A cooling of the solar module 6 thus allows a higher efficiency, since the operating temperature of the solar module 6 is lowered. On the sun-facing side of the support element 2 can have a plurality of second vents 19A in the first subelement 4 and a plurality of third vents 19B in the second subelement 5 be arranged, which the heated air by convection upwards from the carrier element 2 promoted. However, the ventilation openings can only partially, z. B. in blocks in the support element 2 be arranged. The subelement 4 can also without vents 19A be executed and shorter than the sub-element 5 the carrier element 2 his, so the solar panel 6 on the building side of the Louver close to the body axis 100 can be brought.

4 shows a further embodiment of the Louver with solar element 1 , The sun-remote lower area of the Louver with solar element 1 is here with a reflective surface 20 provided to the reflective surface 20 striking sunbeams 21 on the sun-facing side of a respective underlying Louver with solar element 1' to steer. The underlying Louver with solar element 1' is identical to the Louver with solar element 1 , The reflective surface 20 Advantageously, it directs reflected sunlight to an underlying Louver 1' , In this way, even with a partial shading by an overlying Louver with solar element teilabgeschattete solar element area contribute to energy.

5 shows the embodiment of the Louver with solar element 1 from 1 in three-dimensional representation. The front side 22 may be provided with a cover plate (not shown), which is preferably made of the same material as the carrier element 2 consists. The cover plate may, like the carrier element 2 , be provided with ventilation openings to cool outside air into the interior of the support element 2 to lead. The solar module 6 extends here essentially on the entire sun-facing surface of the Louver with solar element 1 and is monolithic.

6 shows a further embodiment of the Louver with solar element 1 according to the present invention, wherein on the sun-facing surface of the Louver with solar element 1 a solar module with different PV elements is arranged. In particular, a substantially rectangular PV element 61 near the forehead area 22 arranged, which occupies about a third of the entire sun-facing surface of the Louver with solar element 1 claimed. The PV element 61 adjacent closes a first gap 23 on to which a second PV element 62 , a third PV element 63 and a fourth PV element 64 connect. The PV elements 62 . 63 and 64 are essentially strip-shaped and parallel to the body axis 100 arranged and through the third space 25 and the fourth space 26 separated from each other. The total area of PV elements 62 . 63 and 64 corresponds to about 50 to 100 percent of the area of the first PV element 61 , A second space 24 forms between the PV elements 62 . 63 and 64 and a fifth PV element 65 so that these are midway between the fifth 65 and the first 61 PV element are arranged. The fifth PV element 65 is rectangular and occupies about one third of the entire solar facing surface of the Louver with solar element 1 , The gaps 23 . 24 . 25 and 26 are designed with small dimensions that are in the range of less than 5 mm.

The thus arranged PV elements are preferably connected in parallel, but may also be connected in series and a mixture of a series circuit and a parallel circuit.

Other embodiments with two or more parallel on the entire surface of the Louver arranged PV elements, in the region of the recess 3 the carrier element 2 are arranged, have also proved to be advantageous.

When technical features mentioned in any of the claims are provided with a reference numeral, these reference numerals have been included only to enhance the intelligibility of the claims. Accordingly, these reference numbers have no limiting effect on the scope of protection of each element, which is exemplified by such reference numerals. LIST OF REFERENCE NUMBERS 1 Louver 17 headboard 2 support element 18 1. Ventilation opening 3 recess 19A 2. Ventilation opening 4 1st subelement 19B 3. Ventilation opening 5 2nd subelement 20 reflection surface 6 solar module 21 Sunbeams 6A PV element 23 1st space 7 1st edge 24 2nd space 8th 2nd edge 25 3rd gap 9A front element 26 4th gap 9B Back element 61 1. solar element 10 1. inside 62 2. solar element 11 1. connection point 63 3. solar element 12 2nd inside 64 4. solar element 13 2. connection point 65 5. solar element 14 support element 100 body axis 15 the bottom part 16 crossmember

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4302883 [0002]
• DE 102008014561 A1 [0003]
• DE 102004025954 A1 [0004]

Claims (17)

Sun protection device with solar element, comprising a support element ( 2 ), and a solar module ( 6 ), characterized in that the carrier element ( 2 ) on the sun-facing side a recess ( 3 ) for receiving the solar module ( 6 ) and the solar module ( 6 ) substantially flush with the sun-facing surface in the recess ( 3 ) is used. Sun protection device according to claim 1, wherein the solar side facing away from the solar module ( 6 ) in the interior of the carrier element ( 2 ) is arranged and at least partially engages behind the carrier element. Sunshade device according to one or more of the preceding claims, wherein the sunshade device has a cross section in the form of a substantially biconvex lens. Sunshade device according to one or more of the preceding claims, wherein the solar module ( 6 ) is flexible. Sunshade device according to one or more of the preceding claims, wherein the solar module ( 6 ) a front element ( 9A ), at least one PV element ( 6A ) and a back element ( 9B ). Sunshade device according to claim 5, wherein the front element ( 9A ) and the back element ( 9B ) consist of glass or plastic. Sunshade device according to one or more of the preceding claims, wherein a support element ( 14 ) between the solar module ( 6 ) and an inner surface of the carrier element ( 2 ) is releasably inserted. Sunshade device according to one or more of the preceding claims, wherein the support element ( 2 ) Ventilation openings ( 18 . 19A . 19B ) having. Sunshade device according to one or more of the preceding claims, wherein the ventilation openings ( 18 . 19A . 19B ) on the sun-remote side of the support element ( 2 ) and the sun-facing side of the support element ( 2 ) are mounted. Sunshade device according to claim 7 or 8, characterized in that the ventilation openings ( 18 ) on the front side ( 22 ) of the carrier element ( 2 ) are mounted. Sunshade device according to one or more of claims 9 to 11, wherein the ventilation openings ( 18 . 19A . 19B ) are oval, square, rectangular, or diamond-shaped. Sunshade device according to one or more of the preceding claims, wherein the sun-remote side of the support element ( 2 ) with a reflective surface ( 20 ) is irradiated by the incident sunlight or reflected sunlight onto an adjacent sun protection device with solar element ( 1' ) is distracted. Sunshade device according to one or more of the preceding claims, wherein the sun-facing side of the carrier element ( 2 ) on the substantially entire surface of a solar module ( 6 ) having. Sunshade device according to one or more of the preceding claims, wherein the sun-facing side of the carrier element ( 2 ) on the substantially entire surface separate PV elements ( 61 . 62 . 63 . 64 . 65 ), which are along the body axis ( 100 ) of the carrier element ( 2 ) is arranged. A sunshade device according to claim 14, wherein the PV elements ( 61 . 62 . 63 . 64 . 65 ) have different shapes. Sunshade device according to one or more of the preceding claims, wherein the support element ( 2 ) is made of aluminum. Sunshade device according to one or more of claims 7 to 16, wherein the support element ( 14 ) is equipped with cooling fins.

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