PHOTOELECTRIC SMOKE DETECTOR Russian patent published in 2019 - IPC G08B17/10 G08B17/107 G01N21/53 

FIELD: security means.

SUBSTANCE: invention relates to fire-fighting equipment, namely to smoke detectors. Photoelectric smoke detector includes an explosion-proof housing having a circuit arrangement chamber for accommodating a circuit board, an inlet chamber provided in the housing and communicating with the special explosion-proof zone, a light-emitting part provided in the inlet chamber, and a light-receiving part provided in the inlet chamber. Light-emitting part includes a first light guide, guiding light emitted by the light-emitting element, into the inlet chamber, and a first supporting portion surrounding and holding the first light guide and communicating with the circuit placement chamber. Light-receiving part includes a second light guide receiving light emitted by the light emitting element in the supply chamber and guiding light to the light receiving element, and a second supporting portion surrounding and holding the second light guide and communicating with the circuit placement chamber. First supporting part and the second supporting part are made with possibility to prevent the flame outflow from the chamber for arrangement of the circuit in the inlet chamber.

EFFECT: wider range of equipment.

12 cl, 31 dwg