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Smoke sensor with independent condensation recognition bin and using method

A smoke sensor, independent technology, applied in instruments, alarms, fire alarms, etc., can solve the problems of weakening the anti-condensation effect, false alarms, easy damage to the coating, etc., achieve long service life and avoid false alarms , The effect of eliminating false alarms

Active Publication Date: 2020-09-04
深圳市高新投三江电子股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual use process, affected by the change of ambient temperature, condensation will occur in the optical dark room, and the condensation will produce a diffuse reflection effect on the light emitted by the transmitting tube, and the receiving tube will receive part of the diffusely reflected light, which will eventually lead to false alarms
In response to this problem, many manufacturers apply anti-fogging agents in the optical darkroom, but the anti-fogging agent is only effective for a period of time, and the dust in the optical darkroom is often cleaned during use, which is easy to damage the coating, further weakening the anti-condensation Effect

Method used

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  • Smoke sensor with independent condensation recognition bin and using method
  • Smoke sensor with independent condensation recognition bin and using method
  • Smoke sensor with independent condensation recognition bin and using method

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a smoke sensor with an independent condensation identification chamber, such as Figure 1-Figure 3 As shown, it includes a casing 10; a smoke detection chamber 11 is fixed inside the casing 10, and a condensation recognition chamber 12 is arranged side by side with the smoke detection chamber 11;

[0026] The inside of the smoke detection chamber 11 is fixed with a first emission tube 13 that emits detection light toward its central region, a first receiving tube 14 that receives scattered light when the smoke scatters the detection light emitted by the first emission tube 13, and prevents the first The detection light emitted from the side of the launch tube 13 shoots to the first partition plate 15 of the first receiving tube 14; the side surface of the smoke detection chamber 11 is provided with a plurality of first smoke inlets 180; the first smoke inlet 180 and the smoke detection chamber 11 Internal connectivity;

[0027] The inner surfac...

Embodiment 2

[0040] This embodiment provides a smoke sensor with an independent condensation recognition chamber, and the similarities with Embodiment 1 will not be repeated, but the differences are:

[0041] Such as Figure 4 As shown, the inside of the condensation recognition compartment 12 is also fixed with a light shield 117 to prevent external light from directly hitting the second receiving tube 18 , so as to reduce the influence of external ambient light on the second receiving tube 18 .

[0042] Such as Figure 4 As shown, there are multiple sets of shading plates 117, and they are scattered and distributed; two sets of shading plates 117 adjacent in the vertical direction are distributed on both sides of the condensation identification chamber 12, and multiple sets of shading plates 117 cooperate to form a circuitous path. , making it difficult for particles to enter the optically sensitive area of ​​the condensation recognition chamber 12 .

Embodiment 3

[0044] This embodiment provides a method for using a smoke sensor, which includes the following steps:

[0045] Step S1: Both the first emission tube and the second emission tube emit detection light.

[0046] Step S2: Obtain a first reverse current value corresponding to the first receiving tube, and a second reverse current value corresponding to the second receiving tube.

[0047] Step S3: If the first receiving tube and the second receiving tube have no reverse current change, the control board does not operate; if the first receiving tube and the second receiving tube have reverse current changes, and the first reverse current value and The difference between the second reverse current value is not greater than the preset trigger threshold, and the control board does not act; if both the first receiving tube and the second receiving tube have reverse current changes, and the first reverse current value and the second reverse current value If the difference between the cu...

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Abstract

The invention relates to a smoke sensor with an independent condensation recognition bin and a using method. The smoke sensor comprises a shell. The shell is fixedly provided with a smoke detection bin and a condensation recognition bin. The smoke detection bin is fixedly provided with a first transmitting tube, a first receiving tube and a first partition plate; the smoke detection bin is provided with a first smoke inlet; a reflection column is fixedly arranged in the condensation recognition bin; the condensation recognition bin is fixedly provided with a second transmitting tube, a secondreceiving tube and a second partition plate; the second transmitting tube and the second receiving tube are positioned at the middle upper part of the condensation recognition bin; the reflecting column is used for reflecting the detection light emitted by the second emitting tube, and the second receiving tube is not in the emergent area of the light reflected by the reflecting column; the condensation recognition bin is provided with an air inlet; the shell is provided with a plurality of second smoke inlets; the shell is further provided with a control panel. The control panel is used for outputting an alarm signal when the difference between the reverse current value of the second receiving tube and the reverse current value of the first receiving tube is greater than a trigger threshold value; and the condition of false alarm is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of smoke sensors, more specifically, to a smoke sensor with an independent condensation identification chamber and a use method thereof. Background technique [0002] Photoelectric smoke detectors, with smoke as the main detection object, are suitable for places where there is a smoldering stage in the initial stage of a fire. Among them, the photosensitive element and the optical darkroom are the main components of the smoke detector. The photosensitive element is composed of several emitting tubes and receiving tubes. In a dark room, the smoke particles have a scattering effect on the light, thereby scattering part of the light emitted by the transmitting tube to the receiving tube, and the receiving tube receives the optical signal and transmits it to the central chip, thereby triggering an alarm. [0003] However, in actual use, due to the influence of ambient temperature changes, condensation will occu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/107
CPCG08B17/107Y02A50/20
Inventor 高庆斌肖学波
Owner 深圳市高新投三江电子股份有限公司
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