Flow channel structure of smoke detector with dustproof performance and smoke detector

Abstract

The invention relates to a flow channel structure of a smoke detector with dustproof performance. The flow channel structure comprises a bottom shell and an annular upper cover, wherein the top of the bottom shell is provided with an inverted-truncated-cone-shaped groove, and an annular dust isolation plate is arranged between the bottom shell and the upper cover; dust isolation plate through holes are formed in the dust isolation plate in the circumferential direction at intervals, the outer edge of the upper surface of the dust isolation plate extends to form a dust blocking part, and the outer edge of the lower surface of the dust isolation plate extends downwards and outwards to form an arc-shaped abutting part. The bottom shell is connected to the lower surface of the dust isolation plate, the bottom of the upper cover is provided with a plurality of connecting plates in the circumferential direction, the connecting plates are connected with the dust isolation plate and separate the dust isolation plate through holes, and meanwhile the invention further discloses a smoke detector adopting the flow channel structure. While the smoke sensing performance of the detector is guaranteed, the dustproof effect is achieved, and the false alarm phenomenon of the detector is reduced.

Description

technical field [0001] The invention relates to the security field, in particular to a flow channel structure of a smoke detector with dustproof performance and the smoke detector. Background technique [0002] At present, photoelectric smoke detectors on the market are mainly based on the principle of particle optical Mie scattering and use optical mazes to detect the concentration of smoke particles. When the concentration of smoke particles reaches the alarm threshold, the detector will alarm. Since the photoelectric smoke detector essentially detects the light scattering signal of particles, non-smoke particles can also cause light scattering, such as dust, water vapor, etc., which is consistent with the light scattering principle of smoke particles. Dust is ubiquitous in the daily environment, especially in places with strong wind and sand, and the accumulation of dust in the detector maze often leads to false alarms. The products on the market today focus on the smoke...

AI Technical Summary

Problems solved by technology

Dust is ubiquitous in the daily environment, especially in places with strong wind and sand, the accumulation of dust in the detector maze often leads to false alarms

The products on the market today focus on the smoke-sensing performance of the detector. In terms of structure, the smoke-sensing part of the maze is kept unobstructed as much as possible, and the maze is directly in contact with the external environment. Although it is easy to ensure the smoke-sensing performance of the detector, However, there is no effective dust-proof effect, and it is easy to accumulate dust and cause false alarms.

Images