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 for detecting a presence of smoke, the smoke detection unit comprising:
a housing having an interior region within which components of the smoke detection unit are contained, the housing having a plurality of openings through which air is flowable into the interior region of the housing, the housing comprising: a back plate that is couplable to a wall of the building or structure so as to secure the smoke detection unit relative thereto; a front casing coupled to the back plate to define the interior region of the housing; a circuit board coupled to the back plate and having a plurality of components mounted thereon so as to support the components and electrically couple the components; an alarm device mounted on the circuit board, the alarm device being activatable upon the detection of the presence of smoke so as to warn an occupant of the building or structure of a potential danger; and a smoke chamber mounted on the circuit board, the smoke chamber having a top surface facing outwardly in a direction of the front casing, a bottom surface facing toward a direction of the back plate, and one or more sides that define an interior chamber, the smoke chamber having one or more components configured to detect the presence of smoke in the interior chamber so as to trigger the alarm device, the smoke chamber comprising a plurality of baffles positioned on at least one side through which smoke is able to flow into the interior chamber, wherein the smoke chamber is mounted on the circuit board such that the top surface of the smoke chamber is positioned above a top surface of the circuit board and the bottom surface of the smoke chamber is positioned below a bottom surface of the circuit board with the baffles extending below the bottom surface of the circuit board and above the top surface of the circuit board such that the interior chamber is accessible to smoke from both the top surface of the circuit board and the bottom surface of the circuit board.