Smoke-sensitive detector labyrinth and smoke-sensitive detector adopting same

The invention relates to a smoke-sensitive detector labyrinth which comprises a labyrinth base and a labyrinth cover, a filter screen is arranged in the labyrinth cover in a surrounding mode, a first groove and a second groove in half cone shapes are formed in the symmetrical positions of the surface of the bottom of a labyrinth chamber along the center axis, a first groove cover is arranged at the tail end of the wide portion of the first groove, and a second groove cover is arranged at the tail end of the wide portion of the second groove. The invention further relates to a smoke-sensitive detector adopting the labyrinth. The smoke-sensitive detector comprises the labyrinth, a circuit board, a base, an upper shell and a lower shell. The structures of the grooves of the labyrinth and the structures of the groove covers of the labyrinth are improved, and the interference resisting capacity of the smoke-sensitive detector is improved; in addition, a programmable photoelectric smoke detector chip RE46C190 powered by a 3V lithium battery is adopted, the system power consumption is reduced, and the size of the smoke-sensitive detector is reduced.