CN1987426A - Vertical two-way dispersion smoke sensing detector labyrinth - Google Patents
Vertical two-way dispersion smoke sensing detector labyrinth Download PDFInfo
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- CN1987426A CN1987426A CN 200510104607 CN200510104607A CN1987426A CN 1987426 A CN1987426 A CN 1987426A CN 200510104607 CN200510104607 CN 200510104607 CN 200510104607 A CN200510104607 A CN 200510104607A CN 1987426 A CN1987426 A CN 1987426A
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- labyrinth
- power valve
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- central optical
- receiving tube
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Abstract
The labyrinth includes probing chamber composed of labyrinth cover and labyrinth base, as well as forward scattering light path and back scattering light path constituted from transmitting tube (3), transmitting tube (6) and receiving tube. Dual scattering light paths including two transmitting paths and one receiving path are adopted in the invention. Using characteristics of different responses on particles in different colors from forward or back scatterings, the method recognizes smog in different colors and grain sizes in order to distinguish not fire alarm factors such as water spray, dust etc so as to raise responsibility of detector, and lower rate of false alarm. Comparing prior art, the invention possesses advantages of superior orientation responsibility, reasonable design, balanced responses for smog in different colors and grain sizes, and lower cost. The invention is applicable to spot type optical detector of fire smoke in auto fire alarm system.
Description
Technical field:
The utility model relates to the automatic fire alarm technical field, exactly is a kind of labyrinth member that is used for spot-type photoelectric smoke detector.
Background technology:
Widely used smoke fire detector has two kinds of ion smoke detector, optical detector of fire smokes in automatic fire alarm system.Though ion smoke detector is balanced to versicolor smog response, contains low-energy αFang Sheyuan, can't adapt to the Product Green environmental protection requirement, is replaced by optical detector of fire smoke substantially.
Vertical or the horizontal forward scattering labyrinth of the general employing of optical detector of fire smoke at present, constitute optical axis included angle greater than 90 ° forward scattering light path by infraluminescence pipe and receiving tube, the infrared light that power valve sends under the normal smokeless situation is absorbed by the labyrinth sidewall, and receiving tube does not receive signal; When smoke particle entered the labyrinth detecting area, smog had scattering process to infrared light, and receiving tube can receive the scattered light signal that is directly proportional with smokescope.
The forward scattering labyrinth is sensitive to the glow greyish white cigarette response that produces of timber, cotton cord, but has only about 1/4 of greyish white cigarette because of the forward scattering intensity of black smoke, and is blunt to the solid, the response of liquid fire that produce black smoke.The naked light of generation particle diameter less than 0.4 μ m particle do not responded substantially, can't distinguish simultaneously for particle diameter such as water smoke, dust and the similar non-fire alarm disturbing factor of smoke particle, therefore limited its application place, in GB GB50116-98 " Code for design of automatic fire alarm systems ", just clearly list " may produce black smoke; May produce steam and mist of oil " the place should not select optical detector of fire smoke.
The place that may produce black smoke when being applicable to increasing fire, two kinds of methods that adopt are usually: the one, improve detector sensitivity, the 2nd, adopt horizontal back scattering labyrinth.Improve detector sensitivity and detector need be reduced 3-4 doubly to the response threshold of greyish white cigarette, detector is improved greatly because of the wrong report probability that non-pyric factors such as dust, water smoke cause, reduced reliability of products.Adopting horizontal back scattering labyrinth is that to utilize the backscatter intensity of black smoke particle be the 2-3 characteristics doubly of greyish white cigarette, improves the response performance to black smoke.But power valve and receiving tube form big entity near lateral wall place, labyrinth, influence the orientation response performance of detector; Be that the direct static background values that causes that reflects of lengthening light path, reduction infrared light is excessive in addition, the radial dimension in labyrinth installs lens additional more greatly and before adopting power valve, receiving tube more, cause that the detector volume is big, the increase of cost, the inconvenience of production, simultaneously the responding range to smog reduce, to the accumulation sensitivity of dust.
The vertical two-way dispersion labyrinth that has advanced an idea at present is to adopt one two mode of receiving i.e. a power valve, two receiving tubes, power valve central optical axis and printed board plane parallel, power valve forms big entity near lateral wall place, labyrinth, influences the orientation response performance of detector; Need install lens in addition additional, increase the big circuit of a socket folding and unfolding, increase production cost equally, produced the assembling complexity.
Summary of the invention:
At the deficiency of prior art existence, the object of the present invention is to provide the vertical two-way dispersion smoke sensing detector labyrinth of two one debit's formulas of a kind of employing, improve the orientation response performance, reduce the detector volume, simplify the mould design, conveniently produce assembling; Distinguish the smog and the non-fire alarm disturbing factor of different colours, particle diameter simultaneously, adopt different threshold value settings, eliminate wrong report.
For achieving the above object, the invention provides a kind of vertical two-way dispersion smoke sensing detector labyrinth, it mainly comprises: labyrinth lid 1, labyrinth seat 2, power valve 3 and receiving tube 6, and power valve 3 all is installed on the labyrinth seat 2 with receiving tube 6, and labyrinth lid 1 is formed detecting chamber with labyrinth seat 2; Power valve 3 constitutes the forward scattering light path with receiving tube 6, the power valve 3 central optical axis 3a of forward scattering light path and the angle α of receiving tube 6 central optical axis 6a are 120 °-150 °, and the angle that plane H that the power valve 3 central optical axis 3a of forward scattering light path and receiving tube 6 central optical axis 6a constitute and printed board 4 place plane P constitute is 90 °; Also be provided with power valve 5 on the labyrinth seat 2, power valve 5 constitutes the back scattering light path with receiving tube 6, the power valve 5 central optical axis 5a of back scattering light path and the angle β of receiving tube 6 central optical axis 6a are less than 90o, and the power valve 5 central optical axis 5a of back scattering light path are 50 °-80 ° with the angle that the plane M that receiving tube 6 central optical axis 6a constitute becomes with printed board 4 place plane P.
According to above-described vertical two-way dispersion smoke sensing detector labyrinth, the plane M that constitutes to the power valve central optical axis 5a of scattering light path and receiving tube central optical axis 6a is 65 ° ± 5 ° with the angle of printed board 4 place plane P formations thereafter.
According to above-described vertical two-way dispersion smoke sensing detector labyrinth, it is 80 ° ± 5 ° to the power valve central optical axis 5a of scattering light path and the angle β of receiving tube central optical axis 6a thereafter.
According to above-described vertical two-way dispersion smoke sensing detector labyrinth, the cylindrical cavity lamp hole that it is 8-12mm that the position that power valve and receiving tube be set on the labyrinth seat 2 is provided with three length, power valve 3, power valve 5 and receiving tube 6 place three lamp holes respectively.
According to above-described vertical two-way dispersion smoke sensing detector labyrinth, thereafter to power valve central optical axis 5a, receiving tube central optical axis 6a on the printed board 4 place surface levels between projection 5b and 6b angle be 90 °.
According to above-described vertical two-way dispersion smoke sensing detector labyrinth, its forward emitted tube hub optical axis 3a, the back to power valve central optical axis 5a on the printed board 4 place surface levels between projection 3b and 5b angle be 90 °.
According to above-described vertical two-way dispersion smoke sensing detector labyrinth, wherein the blue light tube of 460nm wavelength or the ruddiness pipe of 660nm wavelength are adopted to power valve 5 in the back, improve the response performance of detector to naked light.
Vertical two-way dispersion smoke sensing detector labyrinth provided by the invention, adopt two one debit's formulas, its forward scattering light path is inherited the vertical labyrinth design of compact conformation, the lateral wall of labyrinth lid 1 is provided with fume inlet passage, in baffling enters detecting chamber, because two power valves and a receiving tube all are arranged on the seat of labyrinth, do not take the sidewall in labyrinth, fume inlet passage is had no effect, 1 all directions are covered in the labyrinth does not have entering of any entity part obstruct smog, have a good orientation response performance, solved that power valve forms the problem that big entity influences detector orientation response performance near the labyrinth lateral wall in the prior art; Power valve central optical axis 5a, power valve central optical axis 3a and receiving tube central optical axis 6a intersect at a point, it is the longitudinal space that the formation in backscatter sounding district (back to emission, receive the juncture area of optical axis) is also utilized labyrinth seat 2, the identical labyrinth seat 2 that all is in the forward scattering detecting area covers 1 internal layer 1b formation central zone of space with the labyrinth, and most of area coincidence, thereby made full use of limited space, and need not increase the radial dimension in labyrinth; The back to power valve central optical axis 5a, forward emitted tube hub optical axis 3a on the printed board 4 place surface levels between projection 3b and 5b angle be 90 °, the back scattering light path has no effect to fume inlet passage, need not strengthen the volume in labyrinth.
On Mould design, on the basis in existing vertical forward scattering labyrinth, only need seat 2 correspondence positions in labyrinth are set up power valve 5, the forward scattering light path is not produced any influence.The circular cylindrical cavity lamp hole of power valve, receiving tube rises and converges guide effect emission light, scattered light, on cost, need not increase by one two and receive the required another set of amplification receiving circuit of light path, need not increase emission, receiver lens; Simplify Mould design and produced installation.
Vertical two-way dispersion smoke sensing detector labyrinth provided by the present invention adopts two one debit's formulas, comprises that the forward scattering light path of 120 °-150 ° of optical axis included angles and optical axis included angle are less than 90 ° back scattering light path; Constitute the ratio of the receiving tube 6 response output valves of forward scattering light path and back scattering light path respectively by real-time calculating and power valve 3, power valve 5, according to difference to the ratio of the particle of shades of colour, particle diameter, repeatedly judge to confirm to enter non-fire alarm factors such as the color of detecting chamber smoke particle and water smoke, dust, and adjust the response lag of detector according to the color of smoke particle, realize equalizer response to shades of colour smog.
Vertical two-way dispersion smoke sensing detector labyrinth provided by the present invention, power valve 3, power valve 5 timesharing are carried out luminous, 6 pairs of power valves 3 of receiving tube, power valve 5 response output valves are averaged at interval with certain hour, judge the accumulation degree of dust in the labyrinth according to two mean values.Accumulation compensates for the dust of slow variation, and what exceed the qualification amplitude provides the pollution alarm signal.
According to above-mentioned vertical two one receipts two-way dispersion smoke sensing detector labyrinths, power valve 3 is selected the infraluminescence pipe of wavelength 880nm for use, to realize the sensitivity response of forward scattering to greyish white cigarette.Power valve 5 can be selected the blue light tube of 460nm wavelength or the ruddiness pipe of 660nm wavelength for use, according to the theory that rayleigh scattering coefficient and optical wavelength biquadratic are inversely proportional to, improves producing the response performance of particle diameter less than the naked light of 0.4 μ m particle.
In sum, the present invention compared with prior art has the remarkable advantage that the orientation response performance is more superior, design is more reasonable, practical, when realizing, simplified design, reduced production cost, made things convenient for and produced assembling different colours, particle diameter smog equalizer response.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 concerns synoptic diagram for the position on scattering light path plane and printed board plane;
Fig. 4 is power valve, the perspective view of receiving tube central optical axis on the printed board plane;
Fig. 5 is the H face cut-open view of Fig. 3;
Fig. 6 is the M face cut-open view of Fig. 3.
Embodiment:
Referring to Fig. 1, shown in Figure 2, the present invention is fastened with labyrinth seat 2 by labyrinth lid 1 and forms, and is two-layer inside and outside the labyrinth lid 1 minute, is concentric circles.Outer 1a sidewall is provided with into cigarette mesh, and internal layer 1b adopts the sawtooth pattern design than the high 5-6mm of outer 1a, internal layer 1b madial wall and end face 1c, effectively absorbs bias light, reduces the reflection that the dust accumulation causes.Inside and outside two-layer formation baffling fume inlet passage and optical trap, the detecting area that internal layer 1b and labyrinth seat 2 are constituted forms the darkroom, prevents the interference of ambient light, guarantees that smog is without hindrance every entering detecting chamber, has good orientation response performance.
Forward emitted pipe 3, back are set to the position of power valve 5 and receiving tube 6 circular cylindrical cavity lamp hole 2a, 2b, 2c that to be provided with three length be 10mm on labyrinth seat 2, the cylindrical lens encapsulation is adopted to power valve 5 and receiving tube 6 in forward emitted pipe 3, back, be respectively charged in lamp hole 2a, 2b, the 2c, the lamp hole design has stopper slot.Power valve, receiving tube can only be installed by the direction that limits, and avoid occurring oppositely, insert printed board 4 after emission, the bending of receiving tube pin, and be easy for installation, and fixation is played in the labyrinth.
Referring to shown in Figure 3, the angle that plane H that the central optical axis 3a of the forward emitted pipe 3 of forward scattering light path of the present invention and the central optical axis 6a of receiving tube 6 constitute and printed board 4 place plane P constitute is 90 °, belongs to vertical scattering labyrinth.
Constitute forward scattering light path and back scattering light path by forward emitted pipe 3, back respectively to power valve 5 and receiving tube 6, the angle that plane M that the power valve 5 central optical axis 5a of back scattering light path and receiving tube 6 central optical axis 6a constitute and printed board 4 place plane P constitute is 65 °.Adopt two one debit's formulas, need not increase another set of amplification receiving circuit, need not increase emission, receiver lens, simplify production operation.
Forward emitted pipe 3, back are carried out luminous to power valve 5 timesharing, calculate 6 pairs of forward emitted pipes 3 of receiving tube, back respond ratio from output valves to power valve 5 in real time, difference according to ratio, judge that repeatedly the back confirms to enter non-fire alarm factors such as the color of detecting chamber smoke particle and water smoke, dust, and adjust the response lag of detector according to the color of smoke particle, improve response sensitivity for black smoke,, eliminate wrong report for the filtering of non-fire alarm factor.
By time sharing sampling receiving tube 6 in forward emitted pipe 3, back forward scattering response output valve when power valve 5 is luminous and back scattering response output valve, and average at interval with certain hour, accumulation degree according to dust in two mean values judgement labyrinths realizes the automatic compensation to polluting.
Referring to shown in Figure 4, forward emitted pipe 3 central optical axis 3a of the present invention, back are 90 ° to power valve 5 central optical axis 5a, receiving tube 6 central optical axis 6a angle between printed board 4 place surface level P projection 3b and 5b, 5b and 6b, promptly from labyrinth seat 2 top views, the opening of 3 lamp hole 2a, 2b, 2 c is uniform in semicircle.
Referring to shown in Figure 5, forward scattering optical routing forward emitted pipe 3 of the present invention, receiving tube 6 are formed, and the angle α of forward emitted pipe 3 central optical axis 3a and receiving tube 6 central optical axis 6a is 135 °.
Forward emitted pipe 3 is selected the infraluminescence pipe of wavelength 880nm for use, to realize the sensitivity response to greyish white cigarette.
Referring to shown in Figure 6, to form to power valve 5, receiving tube 6 behind the back scattering optical routing of the present invention, the back is 82 ° to the angle β of power valve 5 central optical axis 5a and receiving tube 6 central optical axis 6a.
The back can be selected the infraluminescence pipe of wavelength 880nm for use to power valve 5, the theory that is inversely proportional to according to rayleigh scattering coefficient and optical wavelength biquadratic, for improving, can use the blue light tube of 460nm wavelength or the ruddiness pipe of 660nm wavelength to producing the response performance of particle diameter less than the naked light of 0.4 μ m particle.
Claims (7)
1, vertical two-way dispersion smoke sensing detector labyrinth, it mainly comprises: labyrinth lid (1), labyrinth seat (2), power valve (3) and receiving tube (6), power valve (3) all is installed on the labyrinth seat (2) with receiving tube (6), and labyrinth lid (1) is formed detecting chamber with labyrinth seat (2); Power valve (3) constitutes the forward scattering light path with receiving tube (6), the power valve of forward scattering light path (3) central optical axis (3a) is 120 °-150 ° with the angle α of receiving tube (6) central optical axis (6a), and the power valve of forward scattering light path (3) central optical axis (3a) is 90 ° with the plane H of receiving tube (6) central optical axis (6a) formation and the angle of printed board (4) place plane P formation; It is characterized in that: also be provided with power valve (5) on the labyrinth seat (2), power valve (5) constitutes the back scattering light path with receiving tube (6), the angle β of the power valve of back scattering light path (5) central optical axis (5a) and receiving tube (6) central optical axis (6a) is less than 90 °, and the power valve of back scattering light path (5) central optical axis (5a) is 50 °-80 ° with the plane M of receiving tube (6) central optical axis (6a) formation and the angle of printed board (4) place plane P formation.
2, according to the vertical two-way dispersion smoke sensing detector labyrinth of claim 1, it is characterized in that: the power valve central optical axis (5a) of back scattering light path is 65 ° ± 5 ° with the plane M of receiving tube central optical axis (6a) formation and the angle of printed board (4) place plane P formation.
3, according to the vertical two-way dispersion smoke sensing detector labyrinth of claim 1, it is characterized in that: the power valve of back scattering light path (5) central optical axis (5a) is 80 ° ± 5 ° with the angle β of receiving tube (6) central optical axis (6a).
4, according to the vertical two-way dispersion smoke sensing detector labyrinth of claim 1, it is characterized in that: the circular cylindrical cavity lamp hole that it is 8-12mm that the position that power valve and receiving tube be set on the labyrinth seat 2 is provided with three length, power valve (3), power valve (5) and receiving tube (6) place three lamp holes respectively.
5, according to the vertical two-way dispersion smoke sensing detector labyrinth of claim 1, it is characterized in that: power valve (5) central optical axis (5a), receiving tube (6) central optical axis (6a) on the surface level of printed board (4) place between projection 5b and 6b angle be 90 °.
6, according to the vertical two-way dispersion smoke sensing detector labyrinth of claim 1, it is characterized in that: power valve (3) central optical axis (3a), power valve (5) central optical axis (5a) on the surface level of printed board (4) place between projection 3b and 5b angle be 90 °.
7, according to the vertical two-way dispersion smoke sensing detector labyrinth of claim 1, it is characterized in that: power valve (5) adopts the blue light tube of 460nm wavelength or the ruddiness pipe of 660nm wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510104607 CN1987426A (en) | 2005-12-23 | 2005-12-23 | Vertical two-way dispersion smoke sensing detector labyrinth |
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| CN 200510104607 CN1987426A (en) | 2005-12-23 | 2005-12-23 | Vertical two-way dispersion smoke sensing detector labyrinth |
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| CN1987426A true CN1987426A (en) | 2007-06-27 |
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| CN103093574A (en) * | 2013-01-08 | 2013-05-08 | 中国科学技术大学 | Active inspiration type point type photoelectric smoke detector |
| CN103140882A (en) * | 2011-09-30 | 2013-06-05 | 西门子公司 | Evaluation of scattered light signals in an optical alarm system and evaluating both a weighted smoke density signal and a weighted dust/steam density signal |
| CN103400469A (en) * | 2013-07-31 | 2013-11-20 | 武光杰 | Smoke module |
| CN104408863A (en) * | 2014-11-05 | 2015-03-11 | 中国科学技术大学先进技术研究院 | Dual light path fire smog detection smoke chamber |
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| CN105973769A (en) * | 2016-04-28 | 2016-09-28 | 清华大学深圳研究生院 | Device and method for measurement of size of suspended submicron particulate matter |
| CN108416967A (en) * | 2018-02-06 | 2018-08-17 | 深圳市泛海三江电子股份有限公司 | A kind of back scattering labyrinth |
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| CN109427170A (en) * | 2017-08-31 | 2019-03-05 | 西门子瑞士有限公司 | Smoke alarm |
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| CN109979154A (en) * | 2019-04-19 | 2019-07-05 | 汉威科技集团股份有限公司 | Vertical double light path smoke detection labyrinth and its detection method |
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| CN103140882A (en) * | 2011-09-30 | 2013-06-05 | 西门子公司 | Evaluation of scattered light signals in an optical alarm system and evaluating both a weighted smoke density signal and a weighted dust/steam density signal |
| CN103140882B (en) * | 2011-09-30 | 2015-02-04 | 西门子公司 | Evaluation of scattered light signals in an optical alarm system and output of both a weighted smoke density signal and a weighted dust/steam density signal |
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| CN108734917A (en) * | 2018-06-15 | 2018-11-02 | 东莞茂强电子科技有限公司 | A method of it prevents water mist from causing the smoke alarm of alarm and its prevents wrong report |
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