Smoke detector

Abstract

The invention relates to a smoke detector which comprises a temperature sensor, a smoke sensor, a guide device, a base and an upper cover, wherein the guide device is arranged on the base; the temperature sensor and the smoke sensor are positioned between the base and the guide device; the upper cover is arranged on the guide device; the temperature sensor is arranged in the middle of the guide device of the smoke detector; the smoke sensor is arranged in the eccentric position of the guide device relative to the temperature sensor; the guide device is provided with a plurality of rib parts which extend towards the peripheral edge of the smoke detector and can guide the smoke direction; the rib parts are joined to a joining point above the smoke sensor, so that smoke is guided into the smoke sensor through the guide device. The smoke detector has the advantages of good directivity, flexible arrangement, very good universality and the like; moreover, the inlet smoke properties can be effectively improved, so that the responses of the smoke detector to the smoke in all directions are basically same.

Description

technical field [0001] The present invention is generally in the field of fire safety, and more particularly relates to a smoke detector. Background technique [0002] The US patent application US7616126 assigned by Brain J. Kadwell et al. to Gentex Corporation proposes a particle sensor. The patent discloses a particle detector, which includes a light source, a photoelectric sensor, and a controller, wherein the controller communicates with the light source and the photoelectric sensor. The controller is configured to reject substantially all signals except those generated by the light source. [0003] The Chinese utility model patent CN2831098Y assigned by Wang Wenqing and others to the Shenyang Fire Protection Research Institute of the Ministry of Public Security proposes a particle meter type smoke detector. The particle meter smoke detector disclosed in this patent includes a laser, a laser beam space correction lens, a beam space filter tube, a detection chamber, a l...

AI Technical Summary

Problems solved by technology

Since the intersection point a' of the guide device is not aligned with the detection area of ​​the smoke sensor, this has caused a large obstacle to the movement of the smoke, making the response of the smoke detector inconsistent in all directions, and due to the scattering of light by the white smoke The capacity is greater than that of black smoke, which causes the detector to respond sensitively to white smoke and slow to respond to black smoke, so it is easy to cause false alarms of white smoke and missed alarms of black smoke.

In addition, some existing smoke detectors achieve a balance of sensitivity in all directions by sacrificing the smoke inlet performance. Although this can also achieve directional consistency to a certain extent, it will cause a delay in the response of the detector and be sensitive to wind speed.

Images