Patent ID: 6720886
Filing Date: 2004-04-13
Classification: A62C,G08B,H02B

Abstract:
In a switchgear cabinet (10) including a smoke indicator (1) having an intake pipe (3) and in a housing (2) a smoke sensor (4) and a fan or ventilator (5), which is disposed downstream of the smoke sensor in a flow path and draws air from an interior of the switchgear cabinet (10) into the housing (2) via an inlet aperture in a lower housing wall (2.12) and discharges the air via an outlet into the space outside the housing (2), the improvement comprising:the intake pipe (3) communicating by an upper end region with the inlet aperture, and the housing (2) enclosed in a sealing manner apart from the inlet aperture and the outlet disposed in the interior of the switchgear cabinet (10); the housing (2) disposed in an upper region of the interior of the switchgear cabinet (10) at a spacing from a switchgear cabinet covering wall (10.3); the intake pipe (3) connected with the lower housing wall (2.12) and extending therefrom, the intake pipe (3) having air inlet apertures (3.1) over a length of the intake pipe (3).