The Detachable plane dissemination flow device is adopted a new style and materials, in general assembly, to removal the disseminate flow device inter frame at first, and than to set the external tank fit over the top of the ceiling and to securing all the ceiling around by means of screws. If the screws head basset the surface of external frame, to affect the fitment fa?ade of the hotel and restaurant, and that it is not nice – look. The produce is using a new kind of material, to secure the plane of the L shape by screw, and to buckle the surface of cover board to the exterior surface of the blast inlet in L shape frame. To cover the connection screw head and the connection screws head is not exposed, and than to assembly is easy and nice – look.