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 smoke detection unit for use in a building or structure comprising:
a housing having a back surface that faces a ceiling or wall of the building or structure and a front surface facing a floor or opposite wall of the building or structure, the housing comprising: a circuit board positioned within the housing and having a plurality of components mounted thereon so as to support and electrically couple the components; and a smoke chamber mounted on the circuit board, the smoke chamber having one or more components configured to detect the presence of smoke and having a plurality of baffles through which smoke flows, the smoke chamber being mounted on the circuit board so that at least some of the baffles extend above a top surface of the circuit board and below a bottom surface of the circuit board such that smoke is flowable into an interior of the smoke chamber from both the top surface of the circuit board and the bottom surface of the circuit board.