APPARATUS FOR SIGNALING FIRE DANGER UTILIZING INDOOR PRESSURE FLUCTUATION

摘要

The present invention relates to an apparatus for signaling fire danger designed and manufactured so as to comprise: a fixed plate provided with an air passage hole; a base member fixed to the fixed plate and defining a hollow portion; and a signaling portion installed with one end fixed around the air passage hole of the fixed plate and the other end defining an air passage hole, wherein the signaling portion is configured as bellows to project from or be inserted into the base member according to an indoor pressure fluctuation to visually indicate the pressure fluctuation in a confined indoor space or to issue an audio alert or an electrical signal indicating a state of danger of the indoor space in the event of fire.