| 摘要 |
<p>A ceiling construction with air-cooled lighting fixtures and arranged for air supply and/or removal to/from the underlying room according to the invention is comprising a plurality of parallel channel tubes 1 suspended in spaced relation below a ceiling slab 2. At least some of them serve as ventilation air channels and are connected to a collection or distribution system. The tubes have apertures 18 facing the spaces 17 between said channel tubes. The channel tubes are suspended in separate mountings 3 which are provided with upper support means 11 which support carrier plates 12 arranged between the tubes. Lighting fixtures 13 are fixed to the underside of the carrier plates. The mounting means have also lower support means 14 which, in the areas where the light fixtures are situated, support transparent or translucent optical under plates 15 and in the other areas support other under plates 16, such as acoustic under plates, cover plates or the like, located below the level of the mentioned apertures 18. The under plates are arranged or designed in such a way that air current connection (as at 21) is ensured between the room below and the spaces in which the lighting fixtures are situated. Preferably the tubes have circular cross section and are spiral-coiled made from a strip of sheet material. At least some of the support mountings comprise a two-part stirrup with a top piece 4 designed to be fastened to the underside of a ceiling, a beam or the like, and a bottom piece 6 which can be vertically adjusted in relation to the top piece. The lower part of said bottom piece is adapted to the external cross section shape of the channel tube and being connected at the top to the top piece.</p> |
