| 摘要 |
PURPOSE: A diffuser is provided to enable the construction to be easily and rapidly completed since after a housing is inserted into the ceiling or the wall, two bolts are fastened and a cap member is connected. CONSTITUTION: A diffuser comprises a housing(10) and a cap member(60). A flange(30) is formed under a main pipe(20), a rib(22) is formed on the inner circumferential surface of the main pipe, a nut is built in the center of the rib, a separation preventing protrusion is formed on the outer circumferential surface of the main pipe and a connecting protrusion(28) is formed on the upper part of the inner circumferential surface of the main pipe. The cap member comprises an upper plate of a convex shape, a lower plate of a concave shape and a cap bolt(66). The upper plate and the lower plate are connected, the cap bolt is built in the center of the upper plate and is connected to the nut. The housing comprises connecting units(40), which are installed on two places of one side of the edge, at which the main pipe and the flange are connected. The housing is connected to a diffuser mounting hole by the connecting unit.
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