DETECTOR UNIT AND SENSING CHAMBER THEREFOR

摘要

According to one embodiment, a hazard detector may include a back plate and a front casing coupled to the back plate to define a housing having an interior region and an opening through which air flows into the interior region. A circuit board may be coupled to the back plate and have a plurality of components mounted thereon. A smoke chamber may be mid-mounted on the circuit board, mid-mounting being characterized in the smoke chamber extending through a hole formed in the circuit board such that a top surface of the smoke chamber is positioned above a top surface of the circuit board and a bottom surface of the smoke chamber is positioned below a bottom surface of the circuit board, whereby an interior region of the smoke chamber is accessible to smoke from both the top and bottom surfaces of the circuit board.

主权项

1. A hazard detection unit comprising:
a housing; a circuit board positioned within the housing and having a plurality of components mounted thereon; and a sensing chamber for detecting one or more types of airborne substances indicative of a hazardous condition, the sensing chamber having a top surface, a bottom surface, and at least one air permeable side surface that allows air flow into and out of an interior of the sensing chamber; wherein said circuit board has an aperture formed therein, and wherein said sensing chamber is disposed within the aperture such that the top surface of the sensing chamber is positioned on a first side of the circuit board and the bottom surface of the sensing chamber is positioned on a second side of the circuit board so that air is flowable into and out of the interior of the sensing chamber from both the first side and the second side of the circuit board.