OPTOELECTRONIC SMOKE SENSOR WITH CASING FOR CONDITIONS COMPLICATED BY PRESENCE OF SUSPENDED CEMENT PARTICLES INSIDE ROOM Russian patent published in 2025 - IPC G08B17/10 

FIELD: fire-fighting means.

SUBSTANCE: invention relates to the field of fire alarm, in particular to the optical-electronic smoke detectors (annunciators) of fire alarm with scattered light, in which horizontally ventilated smoke chambers are used. Optoelectronic smoke sensor with a casing for conditions complicated by the presence of suspended cement particles inside a room contains a socket with a fastener, plastic housing in the form of a truncated cone with slotted holes in the side part of the housing, a circuit board, an indicator, an optical module. Housing is made with the rigidly connected to the receptacle base forming the protrusion upper base, a casing in the form of two hollow truncated cones is placed in parallel to the housing side surface, rigidly connected to each other by a common smaller base forming an internal horizontal partition, and upper hollow bases with a radius equal to the radius of the socket base, casing is fixed to the housing lower base by means of four bolts installed in the holes in the housing lower base and the casing inner horizontal partition, upper and lower nuts, in casing upper truncated cone side surface lower part slotted holes are made with width by 30 % larger than that of holes in housing side part, and on the inner side of the casing above the slotted holes below the level of the housing there is a smoke-directing element in the form of a ring with an inner diameter smaller than the diameter of the lower base of the housing, on casing horizontal partition upper surface inside circle formed by holes for bolted joints, and on the upper surface of the smoke-directing element inside the annular space limited by the level of the lower base of the housing, faces are made at angle of 70 degrees, performing the function of dust collectors.

EFFECT: high efficiency of protecting the detector from false triggering while providing high operating reliability of the smoke detector in case of fire, particularly operation of which is complicated by presence of suspended particles of cement and/or construction dust inside a room.

1 cl, 2 dwg