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Photoelectric double-scattering smoke fire detector

A smoke sensing fire and double scattering technology, applied in fire alarms, instruments, alarms, etc., can solve problems such as false alarms or missed alarms, hindering detection, etc., and achieve the effect of improving reliability and accurate alarm analysis

Inactive Publication Date: 2010-03-03
BEIJING AOTENGXUNDA SCI & TECH
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  • Description
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AI Technical Summary

Problems solved by technology

However, since the detector is equipped with holes for smoke penetration, flying insects and the like will crawl into the detector along these holes. When these foreign objects are in some special areas in the detector, it will seriously hinder the detection and cause false report or omit report

Method used

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  • Photoelectric double-scattering smoke fire detector

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Embodiment Construction

[0008] see figure 1 , the photoelectric double-scattering smoke detector includes a housing composed of a top cover, a side wall and a base. , these spacings should be moderate so as to allow air and smoke to pass through these gaps smoothly into the casing, but not allow external light to directly enter the casing, and the casing is provided with a first light emitter and a first light emitter separated from each other. receiver, the photosensitive area of ​​the first light receiver and the irradiation area of ​​the first light emitter intersect each other, so that when the light emitted by the light emitter is irradiated to the intersecting area, if there is The smoke will scatter the light, and part of the scattered light will be received by the light receiver to form a detection signal. A second light emitter and a second light receiver separated from each other are also arranged in the housing, the photosensitive area of ​​the second light receiver intersects with the ir...

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Abstract

The invention relates to a photoelectric double-scattering smoke fire detector. A photoelectric double-scattering smoke fire detector comprises a shell consisting of a top cover, a sidewall and a base, wherein the sidewall is formed by a plurality of folded plates, the folded plates are distributed at intervals, a space is reserved between the adjacent folded plates, a first light emitter and a first light receiver which are mutually separate are arranged in the shell, a photosensitive area of the first light receiver and an irradiating area of the first light emitter are mutually crossed, a second light emitter and a second light receiver which are mutually separated from each other are also arranged in the shell, a photosensitive area of the second light receiver and an irradiating areaof the second light emitter are also mutually crossed, and the shell is further provided with a partial clapboard inside, the first light emitter and the first light receiver are arranged at one sideof the local clapboard and the second light emitter and the second receiver are arranged at the other side of the local clapboard. The photoelectric double-scattering smoke fire detector reduces the probability of omissive alarm and false alarm and can be mainly applied to indoor smoke detection and a fire alarm system.

Description

technical field [0001] The invention relates to a photoelectric double-scattering smoke-sensing fire detector, which can be mainly used in indoor smoke detection and fire alarm systems. Background technique [0002] Photoelectric smoke detectors are currently the main detectors used in the field of fire detection. They use the light scattering characteristics of smoke particles to indirectly sense changes in smoke concentration by measuring the intensity of scattered light, thereby realizing the fire alarm function. However, since the detector is equipped with holes for smoke penetration, flying insects and the like will crawl into the detector along these holes. When these foreign objects are in some special areas in the detector, it will seriously hinder the detection and cause false reported or missed. Contents of the invention [0003] In order to solve the above problems, the present invention provides a photoelectric photoelectric double-scattering smoke detector, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/107
CPCG08B17/107G08B17/113
Inventor 耿立英
Owner BEIJING AOTENGXUNDA SCI & TECH
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