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Photoelectric smoke detector

A smoke detector, photoelectric technology, applied in the field of smoke detectors, can solve the problems of reduced detection sensitivity, false alarms of photoelectric smoke detectors, increased response time, etc., to achieve improved sensitivity, simple structure, and reduced response time Effect

Pending Publication Date: 2020-04-28
BEIJING SENSORO
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] Photoelectric smoke detectors have a wide range of applications, but if water vapor enters the photoelectric smoke detector, a beam of light from the transmitter hits the water vapor, and the water vapor scatters the light. After the receiver receives the scattered light, it is easy to cause False alarms from photoelectric smoke detectors, or reduced detection sensitivity and increased response time

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Embodiment Construction

[0028] Here, exemplary embodiments will be described in detail. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] Such as Figure 1 to Figure 4 As shown, this embodiment discloses a photoelectric smoke detector. The photoelectric smoke detector includes a bottom shell 17 and a face shell 4. The bottom shell 17 is provided with a first PCB board 9 and a second PCB board 14, the first PCB board 9 is provided with a condensation detection device for detecting the concentration of water vapor, the second PCB board 14 is provided with a smoke detectio...

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Abstract

The invention relates to the technical field of smoke detectors, in particular to a photoelectric smoke detector. According to the invention, a condensation detection device used for detecting the water vapor concentration in the environment and a smoke detection device used for detecting the smoke in the environment are arranged in the photoelectric smoke detector at the same time. When the condensation detection device detects that the water vapor concentration in the environment is high, the detection result obtained in the smoke detection device corresponds to the water vapor concentrationdetected by the condensation detection device, so that the influence of the water vapor concentration on the smoke detection device is eliminated, and the correct smoke concentration is obtained. Thesmoke detector is simple in structure and convenient to install, interference of water vapor on the smoke detector can be eliminated, false alarm of the smoke detector due to high water vapor concentration is prevented, the sensitivity of the smoke detector is improved, and the reaction time is shortened.

Description

Technical field [0001] The invention relates to the technical field of smoke detectors, in particular to a photoelectric smoke detector. Background technique [0002] Photoelectric smoke detector is a device that uses fire smoke to absorb and scatter light to detect fire. When smoke particles interact with light, there are two different processes: the particles can re-radiate the received energy at the same wavelength, and re-radiation can occur in all directions, but the radiation intensity in different directions is different, which is called scattering; the other On the one hand, radiant energy can be transformed into other forms of energy, such as thermal energy, chemical energy, or secondary radiation of different wavelengths, which is called absorption. In order to detect the presence of smoke, a beam of light emitted by the transmitter can be hit on the smoke: if it is in the light path, the method of determining the smoke by measuring the attenuation effect of the smoke ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/107
CPCG08B17/107
Inventor 赵武阳苏臻李燕平
Owner BEIJING SENSORO
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