| 摘要 |
The invention relates to a suction hood (3, 4, 5), preferably vortex hood or tornado hood, a) comprising a vortex generator (33, 43, 53) for generating a vortex air stream (336, 436, 536), b) wherein the vortex air stream comprises an at least substantially circular, cyclone, vortex and/or helix like air movement, c) such that fumes or smoke can be pulled into the suction hood (3, 4, 5) by the vortex air stream, d) comprising stabilizing means (32, 433, 54) for improving the stability of the vortex air stream. |
| 主权项 |
1. A suction hood comprising:
a vortex generator configured to generate a vortex air stream, wherein the vortex air stream comprises an at least substantially circular, cyclone, vortex and/or helix like air movement, such that fumes or smoke can be pulled into the suction hood by the vortex air stream from an area below the suction hood toward the vortex generator through a suction area of the vortex generator, and wherein the suction area of the vortex generator comprises an inner surface and a moveable skirt arranged at the inner surface, wherein the inner surface and the moveable skirt form a boundary of an opening in the suction hood in which the vortex air stream is generated and through which the fumes or smoke can be pulled, and wherein the inner surface comprises a cylindrical interior comprising lateral openings for guiding air with a tangential component with respect to the cylindrical interior, and wherein the moveable skirt is configured to be shifted down from a first position to a second position, wherein in the first position, the moveable skirt is arranged inside the vortex generator to block the lateral openings, and wherein in the second position, the moveable skirt is arranged below the vortex generator to extend the suction area of the vortex generator and the boundary of the opening in the suction hood downward away from the vortex generator for improving the stability of the vortex air stream. |
