BRIEF DESCRIPTION OF DRAWINGS
The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
FIG. 1 shows an embodiment of a cowling of the invention;
FIG. 2 is a schematic view in a different view angle of the cowling shown in FIG. 1;
FIG. 3 is a front view of a cowling applied to a wind power generator of the invention;
FIG. 4 is a cross-sectional view of the cowling shown in FIG. 3;
FIGS. 5 to 7 are schematic views to show all kinds of empennages;
FIG. 8 is a schematic view of another embodiment of a cowling of the invention;
FIG. 9 is a schematic view of another embodiment of a cowling of the invention;
FIG. 10 is a schematic view to show a first opening of a cowling facing side of an impeller;
FIG. 11 is a front view the cowling shown in FIG. 10.
DETAILED DESCRIPTION OF INVENTION
The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope df the invention is best determined by reference to the appended claims.
Referring to FIGS. 1 to 3, a cowling 1 of the invention comprises a cover body 10 and an empennage 12 connected to the cover body 10. The cover body 10 comprises an accommodating space 101 and a first opening 103. The accommodating space 101 is communicated to the first opening 103. An impeller 2 for generating electric power is disposed in the accommodating space 101. The first opening 103 is located at one side of the cover body 10 and has an air inlet for transmission of the wind. The position of the empennage 12 is located at the side of the cover body 10 opposite to the first opening 103. The empennage 12 can be adjusted by the wind so the first opening 103 faces the blowing wind. In this embodiment, the first opening 103 is a rectangle and an end 121 of the empennage 12 is a circle.
Referring to FIG. 4, in detail, the impeller 2 further comprises a shaft 21 passing through the center of the impeller 2. The cowling 1 is supported by the shaft 21 via two bearings 22, thus, when the impeller 2 rotates, the cowling 1 can simultaneously rotate without interference.
Note that an end shape of the empennage 12 is not limited. The end of the empennage 12 may be rhombus, polygon, T-shape of fin shape shown in FIGS. 5 to 7. The end of the empennage 12 can be any other shape enabling the cowling 1 to change direction.
The cover body 10 of the cowling 1 further comprises a second opening 105 shown in FIG. 2 opposite to the first opening 103. After the wind passes through the impeller 2, airflow exits from an air outlet, e.g. the second opening 105, to prevent interference between the wind and the airflow.
If the wind is multidirectional turbulence, the empennage 12 rotates along one direction of the multidirectional turbulence. Thus, the first opening 103 of the cowling 1 is adjusted to a stable position so that the first opening 103 faces the wind. One direction of the multidirectional turbulence can pass through the impeller 2 from the first opening 103 to drive the impeller 2. The cover body 10 blocks turbulent wind from other directions entering the cowling 1 and interfering with the impeller 2. Thus, the impeller 2 works efficiently and the lifespan of the impeller 2 is prolonged.
FIG. 8 shows another embodiment of the invention. Compared with FIG. 1, the first opening 303 of the cowling 3 is a bell shape for enlarging the area of the air inlet and concentrating the wind to drive the impeller.
Referring to FIG. 9, the cowling 3 further comprises a plurality of air-guiding elements 305 installed in the first opening 303 shown in FIG. 8 for adjusting the wind. Thus, the impeller 2 works efficiently.
Moreover, the first openings can be located corresponding to one side of the impeller shown in FIGS. 10 to 11. Compared with FIG. 1, the first opening 403 of the cowling 4 does not correspondingly face the impeller 2, but faces the side of the impeller 2. In another word, the first opening 403 faces one side of the blades of the impeller 2. Thus, after entering the first opening, the wind directly drives the blades, thus increasing efficiency.
While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Patent Application
20070248449
