DE20209893U1 - Slats solar panel - Google Patents

Description

Description

The invention relates to a facade attachment serving as sun protection, which is designed as a solar collector.

Such solar collectors are used to convert the sun's radiant energy into heat and, by means of a heat-storing medium, such as water, either supply it to the heating of a building; the water heated in this way can also be used as hot domestic water.

Known solar or vacuum solar collectors are usually mounted on sloping roof surfaces and have a fixed angle to the sun. However, such retrofitting is very complex. In addition, the angle of such fixed solar collectors to the sun is constant, so that optimal solar radiation and heating of the water can only occur for a relatively short time during the day.

The object of the present invention is to create a solar collector of the type described above, which can be subsequently installed at relatively low cost.

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can be built which ensures maximum utilization of solar radiation and at the same time provides protection against excessive solar radiation.

The object is achieved by the measures according to claim 1, in particular with a solar collector consisting of a plurality of slats arranged in groups, having a hollow space and pivotable about an axis of rotation, the axis of rotation of which is alternately associated with a water inlet and a water outlet, and the water outlet of one slat is fluidly connected to the water inlet of the next adjacent slat.

These measures create a solar collector that can be subsequently installed in front of a window front or a glass facade of a building. The rotating slats allow the angle of the surface facing the sun to be changed and adjusted depending on the position of the sun. This adjustment of the angle of attack can be carried out automatically using a control device that regulates itself depending on the position of the sun.

Further advantageous measures are described in the subclaims. The invention is illustrated in the accompanying drawing and is described in more detail below; it shows:

Figure 1 is a schematic representation of a building with a glass façade in front of which a sun protection device held by the side post is placed as a façade attachment;

Figure 2 shows a schematic representation of slats that can be rotated in side posts in the case of flat sunlight (a), oblique sunlight (b) and steep sunlight (c);

Figure 3 shows a detailed view of a rotating,

a hollow lamella, with

baffles arranged in the cavity

and a control device, partially in section;

Figure 4 shows the section through a facade attachment consisting of a large number of slats, in which the slats are pivotally mounted in posts at both ends and are connected via the pivot bearings by water inlets and outlets and

are fluidly connected to one another;

Figure 5 shows a schematic detailed view of a slat, sectioned, with stiffening spacers and thermal insulation (a), with baffles and thermal insulation (b)

and with a honeycomb structure filling its cavity and thermal insulation (c) .

A facade attachment is placed in front of the building 10 shown schematically in Figure 1 as a sun protection device. With this facade attachment 11, which can also be installed later, a glass facade or a window front 12 of a building can be protected from too intense sunlight. This facade attachment 11 is designed according to the invention as a solar collector.

As shown in Figure 2, rotating slats 14 are arranged between side posts 13. The rotating slats 14 can be rotated about a rotation axis 15 and their angle of attack can be adjusted to the respective solar radiation 16. Thus, at a, an almost horizontal solar radiation 16 is shown schematically, at b a relatively steep one and at c an oblique one.

The lamella 14 shown as an example in Figure 3 is provided with a cavity 19. In the cavity 19 baffles 20 are arranged, which can be provided with openings 21.

The slat 14 can be pivoted about its axis of rotation 15 via a control device 17 acting on the side. The upper side 18 of the slat facing the solar radiation 16 can be provided with a heat-absorbing coating, for example a black coating.

As shown in Figure 4, a water inlet 22 and a water outlet 23 are alternately assigned to the rotation axis 15. The water outlets 23 of a slat 14 are fluidically connected to the water inlet 22 in the next adjacent slat 14a via overflow lines 29 guided through the posts.

The heat transfer medium, such as water, is heated by solar radiation and thus its density is reduced. The water, which becomes lighter, rises from lamella to lamella and a circulating, upward flow is created.

In order to avoid cooling when changing from one slat to another, the overflow lines 29 in the posts 13 are protected by thermal insulation material 24.

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As shown in Figure 5 at a, the rear sides 25 of the slats 14 facing the solar radiation also have thermal insulation 26. Baffle plates 20 are provided in the cavity 19 of the slat 14.

In another embodiment, as shown at b, stiffening spacers 27 can also be provided in the cavity 19. The spacers 27 keep the upper side 18 of the slat facing the heat radiation and the rear side 25 of the slat facing away from the solar radiation at a distance in order to ensure the cavity 19.

In a further embodiment, shown in Figure 5 at c, the cavity 19 is provided with a honeycomb-like structure 28.

Reference symbols

10 buildings

11 Facade attachment

12 Glass facade

13 posts

14 .. 14a rotating slat ■"■ ■ ,,

15 Rotation axis

16 Solar radiation

17 Adjusting device

18 Slat top

19 Cavity

20 baffle plate

21 Breakthrough

22 Water inlet

23 Water drainage 2 4 Thermal insulation

25 Slat back

2 6 Thermal insulation

27 stiffening spacer

28 honeycomb structure

29 Overflow line

Claims (12)

1. Solar collector, consisting of a plurality of slats ( 14) arranged in groups, having a hollow space (19 ) and pivotable about an axis of rotation (15 ) , a water inlet ( 22 ) and a water outlet ( 23 ) are alternately assigned to the axes of rotation ( 14 ), and the water outlet ( 23 ) of one slat ( 14 ) is fluidly connected to the water inlet ( 22 ) of the next adjacent slat ( 14a ). 2. Solar collector according to claim 1, characterized in that the slats ( 14 , 14a . . . 14n ) are rotatably mounted with their axes of rotation ( 15 ) in lateral posts ( 13 ). 3. Solar collector according to claims 1 and 2, characterized in that the lateral posts ( 13 ) are provided with overflow lines ( 29 ) and the overflow lines ( 29 ) are fluidly connected to the water inlets ( 22 ) and water outlets ( 23 ) of the slats ( 14 ). 4. Solar collector according to claims 1 to 3, characterized in that the lateral posts ( 13 ) are filled with thermal insulation material ( 24 ). 5. Solar collector according to claims 1 to 4, characterized in that the surface ( 18 ) of the slats facing the radiation is coated to absorb heat. 6. Solar collector according to claims 1 to 5, characterized in that the rear side of the slats ( 25 ) facing away from the radiation is provided with thermal insulation ( 26 ). 7. Solar collector according to claims 1 to 6, characterized in that baffles ( 20 ) are provided in the cavities ( 19 ) of the rotatable slats ( 14 ). 8. Solar collector according to claims 1 and 7, characterized in that the baffle plates ( 20 ) are provided with openings ( 21 ). 9. Solar collector according to claim 1, characterized in that the lamella surfaces ( 18 , 25 ) are kept at a distance by spacer means ( 20 , 27 , 28 ). 10. Solar collector according to claim 1, characterized in that the cavity ( 19 ) of a lamella ( 14 ) is provided with stiffening spacers ( 27 ). 11. Solar collector according to claim 1, characterized in that the cavity ( 19 ) of a lamella ( 14 ) is provided with a honeycomb-like structure ( 28 ). 12. Solar collector according to claims 1 to 11, characterized in that an adjusting device ( 17 ) is associated with the slats ( 14 ).