Rooftop wind generator for electricity generation on buildings

Abstract

A roof wind generator for electricity generation, characterized in that the roof wind generator (1) is permanently installed below the tip of the roof ridge and above the ridge beam (43) and the roof (4) has open areas on both sides next to the roof wind generator (1), so that wind can blow between the tip of the roof ridge and the ridge beam (43) and thereby drive a rotor (2) with a horizontal axis of rotation arranged parallel to the roof ridge, which is connected to the roof wind generator (1).

Description

TECHNICAL FIELD

[0001] The present invention relates to a roof-mounted wind generator for generating electricity on buildings. This primarily utilizes the wind flow, which is converged at the ridge due to the slope of roofs, to drive a three-blade rotor connected to the roof-mounted wind generator. STATE OF THE ART

[0002] A variety of generators are known for generating electricity using wind. Propellers, usually two- or three-bladed, are the most commonly used. Particular examples are the Savonius rotor and the Darrieus rotor, described in patent applications US1697574 and US1835018, respectively.

[0003] In addition to some mobile applications on sailboats – see, for example, European patent EP3754180B1 – and vehicles – see, for example, German utility model DE202015001640U1 – applications on the roofs of buildings dominate. International patent application WO2011010159A2 describes a wind turbine unit consisting of a rotor, an elongated rotor housing with a wind inlet and outlet, and a flow regulator. The wind turbine unit is preferably mounted on the roof ridge.

[0004] As the closest prior art, German utility model DE202008014689U1 discloses a wind turbine for generating energy in which several wind turbine modules are mounted on the roof ridge of buildings and electrically interconnected. Each wind turbine module consists primarily of a horizontally positioned wind turbine shaft and drives two generators at the ends of the shaft.

[0005] Currently, various wind turbines are commercially available that can be mounted on the roofs of buildings. There, they are exposed to the elements without protection and also impair the visual appearance of cities and towns when horizontally or vertically positioned rotors—with or without surrounding housing—reach into the sky. Furthermore, living creatures such as birds and bats can be caught by the rotor blades above the roofs. PRESENTATION OF THE INVENTION

[0006] Based on the cited prior art, the present invention seeks to mount a generator for generating electricity using wind power in such a way that, on the one hand, energy generation is not compromised and, on the other hand, the disadvantages of the prior art are overcome. This object is achieved by the roof-mounted wind generator according to claim 1, which is permanently installed below the peak of the roof ridge and above the ridge edge.

[0007] Preferably, grilles with narrow meshes are attached to the open areas of the roof below the peak of the ridge to prevent living and non-living objects larger than the mesh size from accessing the roof-mounted wind generator. This prevents birds, mice, bats, and other animals from reaching the electrical system or the rotor; leaves or other plant matter can also be blown through the grilles. Above all, the narrow mesh prevents certain animal species from nesting there. To increase effectiveness, the grilles can consist not only of punched holes but also of outwardly curved slats that are inserted into the cutouts.

[0008] Preferably, the roof wind generator is firmly connected to the ridge and / or rafters using a material bond, force fit, and / or form fit. For example, the roof wind generator could be permanently installed using adhesive, screws, nails, etc. below the usually horizontal upper edge of a sloping roof, i.e., below the ridge. The roof is not weakened by the installation of one or more roof wind generators, as the basic structure of the ridge and rafters remains intact.

[0009] It is also preferable for the connection cables for the roof-mounted wind generator to be installed under the roof. This protects the cables and associated electrical equipment from the elements and damage from animals, such as martens.

[0010] The horizontally mounted rotor is particularly preferably a three-blade rotor. Other rotor types are also possible, for example, a two-blade rotor or a rotor with more than three blades.

[0011] Even more preferable is arranging multiple roof-mounted wind generators along the length of the ridge to increase the power generated. The owner of these generators can thus generate at least some of their own electricity.

[0012] In addition, one or more inverters can be used to convert the direct current generated by the generators into alternating current. Grid-connected inverters synchronize the alternating current to the grid frequency before feeding it into the grid.

[0013] It may be advantageous to install one or more additional heating elements to prevent freezing or snowing in during the winter. These heating elements could be powered by the electricity generated by the rooftop wind generator. Advantageously, a battery is charged, which continuously supplies the heating elements as needed.

[0014] For aesthetic reasons, the grids in the open areas of the roof are matched to the color of the roof or roof tiles. The roof-mounted wind generators according to the invention can be installed in new buildings. However, they can also be retrofitted to older buildings. The grids and their frames are preferably made of stainless steel or recycled plastic to prevent weathering and thus last longer.

[0015] The object of the present invention is further achieved by a kit that includes all the components of a roof-mounted wind generator and its accessories. The kit allows for easy installation in the ridge of a house, allowing it to be installed by both a specialist company and a layperson in compliance with regulations.

[0016] Further embodiments and advantages of the invention will become apparent from the features further recited in the claims and from the exemplary embodiment given below. The features of the claims may be combined with one another in any way, provided they are not obviously mutually exclusive. SHORT DESCRIPTION OF THE DRAWING

[0017] The invention is described and explained in more detail below using an exemplary embodiment. In the following: Fig. 1 a plan view of a roof with an open area covered by a grid, under which a roof wind generator according to the invention is arranged, Fig. 2 a schematic sectional view through a roof with a roof wind generator along the section line AA in Fig. 1., Fig. 3 a perspective view of an advantageous embodiment of the roof wind generator according to the invention, which is permanently installed below the tip of the roof ridge and above the ridge fat, wherein the roof has open areas on both sides next to the roof wind generator, which are covered with a grid, and Fig. 4a, Fig. 4b a schematic perspective view of the roof wind generator according to the invention as a single and double version. WAYS TO CARRY OUT THE INVENTION

[0018] Fig. Figure 1 shows a section of a sloping roof 4 of a building with ridge tiles 41 and roof tiles 42. Below the tip of the ridge, a grid 3 is depicted, which conceals an open area in the roof 4. Below this is the roof wind generator 1 according to the invention for generating electricity using wind. The roof wind generator 1 is connected to a rotor 2 via a rotation axis arranged parallel to the roof ridge. The grid 3 depicted has narrow meshes to prevent living and non-living objects with dimensions larger than the mesh size from accessing the roof wind generator 1. On the other, concealed side of the sloping roof 4, at the same height, there is also a grid 3, which conceals an open area. Thus, wind can blow through the two grids 3, driving the rotor 2 and thus the roof wind generator 1. Furthermore, Fig. 1 a section plane AA is drawn.

[0019] In Fig. 2 a cross section along the section line AA of Fig. 1. Visible are a ridge tile 41, several roof tiles 42, the ridge ridge 43, and two rafters 44. The section through the rotor 2 reveals that a preferred 3-blade rotor 2 is installed. This is located in a free space between the ridge ridge 43 and the ridge tile 41. No weakening of the roof 4 is apparent, as the basic structure with the ridge ridge 43 and rafters 44 remains intact.

[0020] At Fig. Figure 3 is a perspective view of a roof 4 not yet covered with tiles 41 and 42, with a grid 3 shown and the roof wind generator 1 and rotor 2 located underneath. The roof wind generator 1 is connected in a materially bonded, force-locked, and / or form-locked manner to the ridge 43 and / or the rafters 44. It is worth mentioning that connection cables for the roof wind generator 1 are laid beneath the roof 4. Preferably, one or more inverters are additionally installed to convert the generated direct current into alternating current. Furthermore, it is advantageous to install one or more heating elements to prevent freezing or snowing in winter. Finally, a kit according to the invention contains all components of a roof wind generator 1 and its accessories, whereby the kit enables simple installation in the ridge of a house.

[0021] Fig. 4a and Fig.4b is a schematic perspective view of the roof wind generator 1 according to the invention as a single and double version which can be installed horizontally along the length of the ridge 43. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] US 1697574

[0002] US 1835018

[0002] EP 3754180B1

[0003] DE 202015001640U1

[0003] WO 2011010159A2

[0003] DE 202008014689U1

[0004]

Claims

[1] Roof-mounted wind generator for electricity generation, characterized by that the roof wind generator (1) is permanently installed below the tip of the roof ridge and above the ridge fat (43) and the roof (4) has open areas on both sides next to the roof wind generator (2) so that wind can blow through between the tip of the roof ridge and the ridge fat (43) and in the process drives a rotor (2) with a horizontal axis of rotation arranged parallel to the roof ridge, which axis is connected to the roof wind generator (1). [2] Roof wind generator according to claim 1, characterized by that grids (3) with narrow meshes are attached to the open areas in the roof (4) below the tip of the roof ridge in order to prevent living and non-living objects with dimensions larger than the mesh size from accessing the roof wind generator (1). [3] Roof wind generator according to claim 1 or 2, characterized bythat the roof wind generator (1) is connected in a materially bonded, force-locked and / or form-locked manner to the ridge fat (43) and / or the rafters (44). [4] Roof wind generator according to one of claims 1 to 3, characterized by that the connection cables for the roof wind generator (1) are laid under the roof (4). [5] Roof wind generator according to one of the preceding claims, characterized by that the horizontally mounted rotor (2) is a 3-blade rotor (2). [6] Roof wind generator according to one of the preceding claims, characterized by that several roof wind generators (1) are installed along the length of the ridge (43) in order to increase the generated power. [7] Roof wind generator according to one of the preceding claims, characterized by that one or more inverters are additionally installed to convert the generated direct current into alternating current. [8] Roof wind generator according to one of the preceding claims, characterized by that one or more heating elements are additionally installed to prevent freezing or snowing in winter. [9] Kit comprising all components of a roof wind generator (1) and its accessories, which allows easy installation in the roof ridge of a house.

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