OPTOELECTRONIC SMOKE DETECTOR Russian patent published in 2024 - IPC G08B17/10 

FIELD: fire alarm.

SUBSTANCE: invention relates to the field of fire alarm, namely to optoelectronic smoke detectors of fire alarm with diffused light, which are designed to detect fire, accompanied by the appearance of smoke in closed rooms with high content of dust. Optoelectronic smoke detector comprises a socket with a fastener, a plastic housing with slotted holes in the upper part of the side cylindrical surface of the housing and with a base, a board, indicator, an optical module, a protective grid, a dust collector, a smoke guide element in the form of a hollow cylinder, fixed by means of pins in slots to the lower inner part of the socket, bottom of the smoke guide element is located below the slotted holes of the housing. In addition, on the base of the housing and coaxially to the housing there is a cylindrical casing in the form of an inverted cup fixed on the outer side by stops made on the base of the housing. On the upper base of the casing, a lower smoke-guiding element is rigidly installed, made in the form of an inverted truncated cone, the angle between the generatrix of the cone of the lower smoke-guiding element and the base of the casing is equal to 45°, truncated cone is made with height providing placement of base of truncated cone between upper smoke guide element and protective net in form of hollow cylinder without bases, made of nylon with cell of 0.3×0.8 mm and installed by the upper base into the slots on the lower inner part of the socket, and by the lower base into the slots on the upper base of the cylindrical casing. On the outer surface of the base of the casing, which is limited by the lower end of the lower smoke guide element, there are faces of the dust collector. Holes are made on the side surface of the casing and on the base of the casing between the smoke guide element and the slots for the nylon net. Inside the casing there is a metal mesh with cell 1×1 mm in the form of a hollow cylinder without bases, rigidly connected to the side surface.

EFFECT: increased efficiency of detector operation in closed rooms with increased content of dust due to improved quality of air filtration, penetrating inside the housing through slotted holes.

1 cl, 1 dwg