DE102004055187B4 - Moldings pair for photovoltaic modules - Google Patents

Abstract

Two complementary as a pair, each one-piece Moldings (1, 3) for mounting photovoltaic modules (2), wherein at each profile strip (1, 3) on a lower base part (5) a substantially vertical support member (7) connects to the End transversely, a support part (9) with a flat mounting surface parallel to the base part (5) is arranged, wherein the base part (5) has a longitudinal Paragraph (11), which results in a graduated approach (13) has, which arranged at a profile strip (1) of the pair below is and at the other profile strip (3) of the pair arranged above is, so the approaches (13) come to rest one above the other when the profile strips are pushed together, being at least one of the paragraphs (11) serves as a stop, and wherein both lugs (13) with recesses (15) are equidistant, in the assembled state at zusammengeschobenem profile strip pair (1, 3) each at least partially cover.

Description

The The invention refers to two complementary pairs one-piece Moldings.

In photovoltaic systems, a plurality of modules are arranged in a matrix-like manner on a support structure. The support structure may, for. B. have two running at different heights purlins or beams, on the way in which it is the case in roof truss, slats are arranged. Such a construction is for example from the DE 102 46 161 A1 known. Conventionally, the frameless photovoltaic modules are attached by means of brackets in the manner of tongue and groove boards on this battens. Another known approach provides to previously glue the photovoltaic modules in the frame and then connect the frame with the support structure. Both methods involve the risk of not exactly the same gap between the modules and are still relatively expensive during assembly.

A further problem lies with respect the strength of the connection of the profile strip with the photovoltaic module in front. This connection is usually made with silicone that has the property only on his Edge area, where there is a sufficient supply of air to cure. Corresponding is the required traction only about 10 mm from the left and ensures the right edge of the profile strip. In the middle area The silicone compound remains soft and causes only a weak adhesive effect.

From the DE 202 15 462 U1 is a profile strip for the assembly of PV modules is known in which a laminate is fixed with a molded part, which is provided on its side facing the laminate with integrated support elements that allow direct mounting of the module on a mounting base.

From the JP 2003124493 A is a Profileistenpaar disclosed, which should be used as a roofing. For this purpose, an upper and a lower frame part are nested. The two frame parts each have a smooth, continuous floor surface.

From the US 2004/0187909 A1 is a pair of profile strips known, which forms a drainage channel in the assembled state. For this purpose, one part has water-removing ribs and the other has a covering part projecting beyond the ribs.

From the JP 2003056147 A a profile strip is known, the base part is provided with a recess through which a screw can be guided for attachment to a substructure. The base parts are made identical and can be superimposed against each other in the limits of the opening.

From the DE 40 14 200 A1 are known profile strips for PV modules, which have a rectangular cross-section, one side is used to attach the laminate and the opposite side is connected to the substructure. Furthermore, a profile strip with mounting foot is presented.

In the DE 39 16 124 A1 a profile strip for a PV module is described, which has a trapezoidal cross-section. The longer side of the trapezoid carries the PV laminate and the shorter one is on the mounting surface. Another side of the trapezium serves as a support part and is provided with a laminate projecting approach.

The The present invention has for its object to provide means with which the collector modules in a simple way to the support structure can be applied at a defined distance from each other.

The upper, free side of the carrier part, which faces away from the vertical support part, is glued to the photovoltaic module (preferably factory) so that the edge of the module is flush with the edge of the support member, under which the lugs are formed. If two carrier modules are then pushed together, this results in the 2 Picture shown: The lugs slide over each other until reaching the heel. Then lie the profile strips and thus the modules mounted on them at a defined distance from each other. The distance can be adjusted over the selected width of the lugs and should be sufficient to the required fastening tool, such. As a nut to be able to push through between the adjacent collector modules.

It is advantageous, the carrier part on its flat mounting surface with at least one groove for the formation of the ventilation channel and possibly still to take superfluous glue to provide. This measure allows a planar resting of the collector modules on the upper carrier part surface. The Groove should run along the attachment line at which the vertical supporting part attached to the carrier part is. This has the advantage that the associated with the groove material removal not a big one Influence on the stability the support surface has.

Another advantageous embodiment of the invention provides that the paragraph is on the line, which results when the edge of the support member is projected perpendicular to the base part. In this case, the gap which, after assembly of the two moldings between the ge opposite edges of the support member (and thus between the photovoltaic modules) results, defined by the width of the approach. If the recesses are arranged centrally on the lugs, then they are also centered to the resulting intermediate gap and can be easily reached with the tool, such as a screwdriver or ratchet.

It arises as a significant advantage of all embodiments that the photovoltaic module free lies and not by supernumerary Components is shadowed. Furthermore, snow can easily slip off. The Profile strip is self-cleaning and both as a partial or as a full frame easy to produce.

Of the Self-cleaning is in the construction of photovoltaic modules to pay a lot of attention The module also enclosing profile strips above to lead forcibly to a backlog of particle-contaminated rainwater. After drying remains a dirt layer, the light on the Module and in particular on its photovoltaic cells by reflection and absorption hindered and reduced. As the efficiency of a module from the yield of the in-line weakest cell is determined, are not the module edge cross profile strips a significant contribution to the increase the efficiency.

Further Advantages will become apparent from the description of an embodiment based on the figures.

It demonstrate:

1 a sectional view of two opposing profile strips in the separated state;

1a 1 with a registered, advantageous dimensioning of the profile strips;

2 a sectional view of two opposing profile strips in the assembled state with photovoltaic modules;

3 a sectional view of a photovoltaic module with glued profile strips;

4 a view of a photovoltaic module with glued profile strips;

5 a sectional view of a non-inventive profile strip for explanatory purposes;

5a 5 with a registered, advantageous dimension of the profile strip;

6 a sectional view of two opposing moldings in the assembled state with photovoltaic modules with module clamp; and

7 a sectional view of stacked for transport photovoltaic modules.

The left half of the 1 shows a single-storey profile strip 1 as for the assembly of photovoltaic modules 2 is used. The profile bar 1 has a base or base below 5 , which will be screwed onto the beams or slats of the scaffolding of the photovoltaic system later. From the base part 5 from extends substantially perpendicularly a support member 7 , about which the weight of the photovoltaic modules 2 and the forces bearing on them on the base part 5 be transmitted.

The support part 7 may be a continuous web, a double-walled element, a perforated perforated plate or any other suitable component for transmitting forces. At the upper end of the support part 7 closes a transverse carrier part 9 at. The free upwardly facing surface of the support part 9 serves for bonding to the photovoltaic module 2 , Preferably, the carrier part 9 centered to the support part 7 arranged as it is in 1 is shown.

The base part 5 has a longitudinal paragraph 11 on, of a graduated approach 13 entails. Paragraph 11 runs in the longitudinal direction of the profile strip 1 and its thickness is preferably chosen to be up to half the material thickness. In this way, the step-shaped approach arises 13 , in the profile bar shown on the left 1 lies down and thus an extension of the lower surface of the base part 5 forms.

When in the 1 right profile strip 3 , which is basically the same structure, is the step-shaped approach 13 formed above lying, so that he an extension of the upper surface of the base part 5 forms.

To facilitate the gluing of the profile strips 1 . 3 to an edge of the photovoltaic module 2 and to achieve a high strength of the adhesive bond, is the support part 9 a longitudinal groove 17 intended. A favorable place for the groove 17 lies in the extension of the vertical support part 7 , Then starting from the end of a V-shaped branch can be configured, wherein at the ends of the V, the horizontal, ie parallel to the base part 5 lying surfaces of the support member 9 connect. The groove 17 is then also V-shaped. When designing has groove 17 that the support part 9 in two carrier strips 18a . 18b Care should be taken to ensure that their cross-section is chosen so large that after gluing the strip to the photovoltaic module 2 a free ventilation duct 20 remains so that oxygen reaches the edges of the Adhesive, usually a silicone product, can get. The two approaches 13 are with recesses 15 , such as B. extending in the strip direction oblong holes, which preferably have the same distance from each other.

The 1a shows the pair of profile strips after the 1 with registered dimensions of the individual parts. Depending on the size and weight of the photovoltaic modules 2 For example, the dimension may deviate from the specified dimension in a range of approximately plus or minus 30 percent. It is particularly advantageous if the strength of the support part 7 smaller than the base part 5 , Through the thinner support part 7 is causing a bump in the substructure possible bending forces not directly on the fracture-sensitive photovoltaic module 2 transmitted, but are intercepted by acting as a spring support member. An additional advantage is the compensation of temperature-induced changes in length of the modules 1 . 3 , The thin support member can bend in a serpentine manner and thus compensate for an offset in the horizontal plane, although a minimal lowering of the module 2 entails, but which has no technical disadvantages.

In the 2 is that in the 1 illustrated profile strip pair 1 . 3 in the collapsed state, so shown ready for assembly. On top of the carrier parts 9 are each photovoltaic modules 2 glued, their edge with the edge of the profile strip 1 . 3 flees. The moldings 1 . 3 are expediently already so with the photovoltaic module 2 pre-assembled, that on the construction site no more gluing work is done. During assembly, the two moldings 1 . 3 pushed together until one of the approaches 13 at the heel 11 the other profile strip abuts.

In the shown mirror-symmetrically shaped profile strips 1 . 3 Both approaches are used 13 to the paragraphs serving as a stop 11 come to the concern. It is appropriate that paragraph ( 11 ) half the material thickness of the base part ( 5 ) having. In principle, it is also conceivable, more complicated overlaps than the above and below approaches 13 provided. So z. B. may be provided with a centrally located groove in the manner of a tongue and groove joint, a profile strip. The other profile strip is then equipped with two approaches, one of which is located above and the other below the central counterpart.

The approaches 13 are with recesses 15 provided, which are preferably arranged at the same distance from each other. The moldings 1 . 3 are to be glued to the photovoltaic modules so that in the ready-to-mount position the recesses 15 are opposite.

Manufacturing and assembly tolerances are compensated in the usual way that the recesses 15 at least one of the moldings 1 . 3 are longitudinally extending slots. Thus, a fastener, such. B. a screw with washer through which resulting between two photovoltaic modules gap are performed and through the recesses 15 be bolted through with the substructure of the supporting framework. The width of the gap is determined by the length of the lugs 13 determined and chosen so that the desired tool such as a screwdriver or nut fits through.

If a rectangular photovoltaic module 2 is used, as it is in the 3 and 4 shown are expediently the long edges of the module 2 each with one of the profile strips 1 and 3 Mistake. The bonding is done so that the edge of the module with the edge of the mounting surface of the support part 9 Aligns as it is in the 3 is shown. It can also be seen that the paragraph 11 is located on a line that results when the edge of the carrier part 9 perpendicular to the base part 5 is projected. Or in other words, the edge of the fastener 9 Aligns along the dashed line 21 with the paragraph 11 ,

5 shows for demonstration purposes, another embodiment of a one-piece profile strip 1a as used for mounting photovoltaic modules or solar collector modules 2a is used. The profile bar 1a has a base or base below 5a on, which should later come to rest on the beams or slats of the scaffolding of the collector system. From the base part 5a from extends substantially perpendicularly a support member 7a , about which the weight of the photovoltaic modules 2a and the forces bearing on them on the base part 5a be transmitted. The support part 7a may be a continuous web, a double-walled element, a perforated perforated plate or any other suitable component for transmitting forces. At the upper end of the support part 7a closes its a transversely lying carrier part 9a at. The free upwardly facing surface of the support part 9a serves for bonding to the photovoltaic module 2a , Preferably, the support member closes 9a flush with the edge of the supporting part 7a as it is in the 5 is shown.

On the support part 9a is relatively close to the support part 9a a survey 22a provided, which runs longitudinally in the profile strip direction and preferably has a rectangular cross-section. The assessment 22a serves as a stop for the photovoltaic module 2a during the sticking process. The height of the survey 22 is to be dimensioned such that no rainwater residues reach the plastic film, which is usually different layers of the photovoltaic module 2 separates each other. Accordingly, the height should be about one third of the module height. In the gluing process is by means of an adhesive 24a the photovoltaic module 2a in one about the survey 22a defined distance to the outer edge of the profile strip 1a glued to this. To create a free ventilation duct 20a after mounting the module 2a on the frame and to facilitate the sticking of the profile strip 1a to the edge of the photovoltaic module 2a , is in the carrier part 9a a longitudinal groove 17a intended.

In addition, depending on the available dimensions and the selected adhesive 24a be provided further grooves, which can also extend transversely or obliquely to the profile strip direction. Especially in the presence of one of the moldings 1a formed, closed frame, make sure that the ventilation duct 20a possibly by additional holes, recesses or transverse grooves does not lose its air supply property.

The base part 5a has a longitudinal ridge or approach 26a on, at the edge of the base part 5a lies and whose, in the case shown right-hand conclusion forms. In this case, the base part 5a a width that, except for adhesive residues maximum the distance between the survey 22a and the edge of the carrier part 9a corresponds to the support part 7a is facing. By this measure, a good stackability with the profile strip 1a preassembled photovoltaic modules are achieved, as can be seen from the 7 is apparent.

The 6 shows two photovoltaic modules 2a , side by side by means of a module clamp 25a on a substructure 26a are screwed on. For this purpose, the module bracket 25a a hole through which a fixing screw 28a is guided. Depending on the material of the substructure 26a Wood or machine screws are used. The module clamp 25a is at its bottom with two bars 30a . 32a each provided as a stop for one of the adjacent profile strips 1a serve. The other side of the footbridges 30a . 32a outwardly projecting part of the module clamp 25a is equal to the distance between the survey 22a and the edge of the carrier part 9a , the support part 9a is facing.

Claims (8)

Two pairs of profiles, each in one piece, 1 . 3 ) for mounting photovoltaic modules ( 2 ), with each profile strip ( 1 . 3 ) at a lower base part ( 5 ) a substantially vertical support member ( 7 ), at the end transversely a support part ( 9 ) with a flat mounting surface parallel to the base part ( 5 ), wherein the base part ( 5 ) a longitudinal section ( 11 ), which has a graduated approach ( 13 ), which in a profile strip ( 1 ) of the pair is arranged below and at the other profile strip ( 3 ) of the pair is arranged above, so that the approaches ( 13 ) come to lie one above the other when the profile strips are pushed together, wherein at least one of the paragraphs ( 11 ) serves as a stop, and whereby both approaches ( 13 ) with recesses ( 15 ) are provided at the same distance, which in the assembled state with zusammengeschobenem profile strips pair ( 1 . 3 ) at least partially cover. Profile strip pair according to claim 1, characterized in that the carrier part ( 9 ) on its flat mounting surface at least one groove ( 17 ) to form a ventilation channel ( 20 ) and for receiving unnecessary adhesive. Profile strip pair according to one of claims 1 or 2, characterized in that the groove ( 17 ) along the attachment line, at which the vertical support part ( 7 ) with the carrier part ( 9 ) is attached. Profile strip pair according to one of claims 1 to 3, characterized in that the recesses ( 15 ) at least one of the profile strips ( 1 . 3 ) are elongated slots. Profile strip pair according to one of claims 1 to 4, characterized in that the vertical support part ( 7 ) is a continuous web. Profile strip pair according to one of claims 1 to 5, characterized in that the vertical support part ( 7 ) at one edge of the base part ( 5 ) is arranged. Profile strip pair according to one of claims 1 to 6, characterized in that the paragraph ( 11 ) is on the line that results when the edge of the support member ( 9 ) perpendicular to the base part ( 5 ) is projected. Profile strip pair according to one of claims 1 to 7, characterized in that the paragraph ( 11 ) half the material thickness of the base part ( 5 ) having.