Flow-guiding hood for guiding a flow of air

1. A flow-guiding hood that guides a flow of air in a computer or an electronic device comprising a plurality of individual parts which comprises:

a first flow-guiding element made of a substantially planar first material, shaped such that the first flow-guiding element is composed of two-dimensional regions, each of which are flat and have straight edges, and the first flow-guiding element that channels the flow by providing a main flow channel that causes a rough, approximate flow pattern, and

at least one second flow-guiding element made of foamed plastics material as a different, second material and likewise channels the flow,

wherein the second flow-guiding element rests on and/or is attached to the first flow-guiding element, and the second flow-guiding element finely controls the flow pattern.

2. The flow-guiding hood according to claim 1 , wherein the second flow-guiding element is cut to size, punched or otherwise shaped such that it is defined predominantly by flat faces.

3. The flow-guiding hood according to claim 1 , wherein the second flow-guiding element has one or more flat faces adhesively attached over a whole area thereof, to the first flow-guiding element.

4. The flow-guiding hood according to claim 1 , wherein the planar material of the first flow-guiding element is foldable, bendable or deformable to form a plurality of flat segments.

5. The flow-guiding hood according to claim 1 , wherein the planar material of the first flow-guiding element is a plastics sheet or, a sheet metal or cardboard.

6. The flow-guiding hood according to claim 1 , wherein the first flow-guiding element is a punched shaped part.

7. The flow-guiding hood according to claim 1 , wherein the first flow-guiding element is divided into a plurality of flat segments.

8. The flow-guiding hood according to claim 7 , wherein the flat segments of the first flow-guiding element are differently oriented and are delimited from each other by bends, folds, perforations, punchings or by straight edges.

9. The flow-guiding hood according to claim 1 , wherein the first flow-guiding element is shaped so that on a first surface it defines a main flow channel, and all of one or more second flow-guiding elements are attached on a same face of the planar first material of the main channel.

10. The flow-guiding hood according to claim 1 , wherein one or more second flow-guiding elements are arranged on a same face of the first planar material of the main channel such that they locally constrict the main flow channel into a plurality of part-flow channels.

11. An electronic device comprising the flow-guiding hood according to claim 1 .

12. A computer comprising the flow-guiding hood according to claim 1 .

13. The flow-guiding hood according to claim 1 , wherein one or more second flow-guiding elements are arranged on a same face of the first planar material of the main channel such that they locally divide the main flow channel into a plurality of part-flow channels.

14. A flow-guiding hood that guides a flow of air in a computer or an electronic device comprising a plurality of individual parts which comprises:

a first flow-guiding element made of a substantially planar first material, shaped such that the first flow-guiding element is composed of two-dimensional regions, each of which are flat and have straight edges, and the first flow-guiding element that channels the flow by providing a main flow channel that causes a rough, approximate flow pattern, and

at least one second flow-guiding element made of foamed plastics material as a different, second material and likewise channels the flow,

wherein the second flow-guiding element rests on and/or is attached to the first flow-guiding element, and the second flow-guiding element finely controls the flow pattern, and both the first flow-guiding element and the at least one second flow-guiding element actively channel the flow pattern.