Detection device for photoelectric smoke sensing

A detection device, photoelectric smoke technology, applied in fire alarms, instruments, alarms, etc., can solve the problems of low accuracy and weak scattering intensity of black and white smoke, so as to reduce false alarms, superior azimuth consistency, and improve screening. effect of ability

Pending Publication Date: 2020-11-17
BEIJING LEADER HUAXIN ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large background light of the backscattered optical path and the relatively weak scattering intensity for black and white smoke, the accuracy of photoelectric smoke detection devices on the market is low

Method used

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  • Detection device for photoelectric smoke sensing
  • Detection device for photoelectric smoke sensing
  • Detection device for photoelectric smoke sensing

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Embodiment Construction

[0024] In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

[0025] The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used...

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Abstract

The invention relates to the technical field of fire detection devices, and discloses a detection device photoelectric smoke sensing. The device comprises a first cylinder with a closed top, an open bottom and smoke inlet holes in the circumferential direction; a second cylinder body arranged in the first cylinder body and positioned on the open side; a base arranged below the first cylinder body;multiple anti-dazzling screens arranged on the top surface of the base and distributed in the radial direction of the base, wherein a smoke gathering cavity is jointly defined by the second cylinderbody, the base and all the anti-dazzling screens; a circuit board; a first transmitting tube; a second transmitting tube; a photosensitive receiving tube, wherein the first transmitting tube, the second transmitting tube and the photosensitive receiving tube are all connected with the circuit board, and the first transmitting tube, the second transmitting tube and the photosensitive receiving tubepenetrate through the base and face the interior of the smoke gathering cavity. The device can improve the smoke detection sensitivity and the smoke detection precision, and reduces the false alarm of a non-fire interference source.

Description

technical field [0001] The present application relates to the technical field of fire detection devices, for example, to a detection device for photoelectric smoke. Background technique [0002] In recent years, due to the frequent occurrence of fires, it has caused great losses to people's lives and property. Therefore, timely detection of fires and alarming are the key points to reduce losses. The basic principle of photoelectric smoke detectors is to detect the scattering of light by fire smoke particles. The particle size of the smoke is mostly in the range of 0.1 micron to 1 micron, and the wavelength range of the commonly used emission tube is 460 nm to 940 nm. The scattering of the smoke particles conforms to the Mie scattering principle, and its scattering parameter α=πd / λ, where, d denotes the particle diameter, and λ denotes the wavelength of the incident light. It can be seen that the scattering intensity is proportional to the particle diameter and inversely pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/103G08B17/107
CPCG08B17/103G08B17/107
Inventor 陈洪颖王世彪席红梅
Owner BEIJING LEADER HUAXIN ELECTRONICS
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