| 摘要 |
Described is a grille element (9; 9') intended for placing in a ventilation opening (8), which element is made up of a number of metal, U-shaped sections (16; 26), which are disposed next to each other and opposite each other with the legs engaging in each other, so that an S-shaped flow route (30) for air flow is defined. A thermoexpansion material (51) is arranged on the inside surface of the bottoms (10; 20) of said U-shaped sections, preferably with a sounddamping material (52) on top of it. In a fire situation, the thermal radiation on the outside surface of the bottoms of said U-shaped sections (16; 26), will cause the thermoexpansion material (51) to swell up, with the result that said S-shaped flow routes (30) are shut off. |
