CN101540088B - Smoke detector - Google Patents
Smoke detector Download PDFInfo
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- CN101540088B CN101540088B CN2009101181380A CN200910118138A CN101540088B CN 101540088 B CN101540088 B CN 101540088B CN 2009101181380 A CN2009101181380 A CN 2009101181380A CN 200910118138 A CN200910118138 A CN 200910118138A CN 101540088 B CN101540088 B CN 101540088B
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Abstract
The invention provides a smoke detector enabling an air velocity of sampling air to be precisely measured. The smoke detector (S) includes: a smoke detection part (22) connected to a sampling pipe (11); a fan (12) that sucks sampling air (SA) into the sampling pipe; and an air velocity sensor (15) that measures an air velocity of the sampling air within the sampling pipe. The air velocity sensor (15) is disposed at a primary side of the fan (12), and a straightening vane (25) is disposed between the air velocity sensor (15) and a suction port (12a) of the fan (12).
Description
Technical field
The present invention relates to detect because of what fire produced and swim in polluter such as airborne cigarette and report the smoke detector of breaking out of fire with optical mode.
Background technology
As fire preventing or the detection system when producing cigarette, perhaps in the semiconductor fabrication factory or bakery and confectionery that need certain environment to save from damage, the usability smoke detector.
Existing smoke detector comprises: be connected sampling with the inspection cigarette portion on the pipe arrangement, the sampling air be attracted to this sampling with the fan in the pipe arrangement, the said sampling of measurement with the air velocity transducer (for example with reference to patent documentation 1) of the wind speed of the sampling air in the pipe arrangement.
In this smoke detector, import inspection cigarette portion to the part sampling air that flows in pipe arrangement in said sampling, and after carrying out the detection of cigarette with the smoke sensor of this inspection cigarette portion, turn back to said sampling air with in the pipe arrangement.At this moment, control said fan, make it to said inspection cigarette portion the sampling air is provided according to designing requirement according to the wind speed that said air velocity transducer is measured.
The air-breathing effluent road branching portion that existing smoke detector comprises inspection cigarette portion with inflow entrance and flow export, be laid on stopple coupon in the monitored space, be connected the gas flow tube that makes sampling air flow therein on this stopple coupon, be arranged on the said gas flow tube and be connected with the inflow entrance of said inspection cigarette portion and be arranged on said inflow entrance and a said air-breathing side branching portion between filtrator (for example with reference to patent documentation 2).
In this smoke detector; The part sampling air that in said gas flow tube, flows; Import from the air entry of a said air-breathing effluent road branching portion, remove dust etc. with filtrator after, offer inspection cigarette portion; And after the smoke sensor with this inspection cigarette portion carries out the detection of cigarette, turn back in the said gas flow tube through exhausr port one effluent road fluidic junction from flow export.
No. the 3714926th, patent documentation 1 jp patent publication
Summary of the invention
As shown in Figure 4, sampling is with being equipped with fan 2 in the pipe arrangement 1, and its end is provided with the peristome 3 that attracts sampling air SA.
Using with big air quantity under the situation of fan (fan blower) 2, the inlet 3a of extraction sampling air opens very big shown in dotted line, near the attraction mouth 4 of fan 2, can on the suction side one pipe arrangement of fan, reverse flow not take place, and causes air turbulence.
Open for a short time if extract the inlet 3a of sampling air, make to attract air quantity to reduce, then, begin to occur reverse flow because the rotation of the moving blade in the fan 2 will produce disorderly air-flow in import one side line of fan.
If make the inlet 3a of said extraction sampling air also littler than the peristome of representing with solid line 3; Further reduce and attract air quantity; The reverse flow air-flow L that then produces because of the disorderly air-flow from said fan 2 rotates in pipe arrangement 1 in said sampling, through air velocity transducer 5.Therefore air-flow is also unstable near air velocity transducer 5, so measuring wind exactly.
In order to solve above-described problem, can air velocity transducer 5 be left the enough distances of fan 2, make air velocity transducer 5 not influenced by reverse flow air-flow L, but this can make smoke detector maximize, so not preferred.
In view of said situation, first purpose of the present invention is to measure exactly the wind speed of sampling air.
In addition, in existing example, owing to directly import the part sampling air that contains dust etc. in the gas flow tube through filtrator, amounts of dust etc. is deposited in this filtrator and results in blockage sometimes.Therefore to frequently clean or change filtrator, so the upkeep operation of filtrator will spend great amount of time and expense.
In view of described situation, second purpose of the present invention is to reduce the quantity from the foreign matters such as dust that air entry attracted of an air-breathing effluent road branching portion.
The inlet diverter of existing smoke detection system is connected on the suction inlet of fan.This fan makes air be attracted in the inlet diverter through pipeline.Through in whole air-flows of fan, except with the part that is sampled as the very small scale that purpose uses, all the outlet from fan directly is discharged into the atmosphere through gas exhaust duct, or is discharged in the gas exhaust duct.
And partly pass through filtrator with the air-flow that is sampled as the purpose use, enter into the inlet of the sensing chamber of smoke detector.The outlet of sensing chamber is connected on the inlet diverter.But the opening of coupling part is little, causes the pressure loss of air-flow of the branching portion of sampling usefulness to become big.
In view of described situation, the 3rd purpose of the present invention is to reduce to have the pressure loss of the branching portion air-flow of examining cigarette portion, and can make stable the converging of sampling airflow from the gas flow tube that the sampling airflow and the fan of the discharge of inspection cigarette portion are attracted.
The smoke detector of first invention comprises: be connected sampling with the inspection cigarette portion on the pipe arrangement; Be attracted to this sampling to the sampling air with the fan in the pipe arrangement; Measure the air velocity transducer of said sampling with the sampling air wind speed in the pipe arrangement; It is characterized in that; Said smoke detector has inflow portion, and box shape is substantially made by said inflow portion, and the inlet of said sampling air is extracted in configuration in the side; Dispose the attraction mouth of said fan in the bottom surface; In said inflow portion, the airflow direction of the airflow direction of the said sampling air of said fan inlet one side and the attraction interruption-forming of said fan is vertical basically, in said inflow portion, is provided with said air velocity transducer and cowling panel; Said air velocity transducer is arranged on import one side of said fan; And between this air velocity transducer and said fan, be provided with said cowling panel, said cowling panel is arranged on the bottom surface of said inflow portion, is used to stop that the reverse flow air-flow that is produced by said fan is to said air velocity transducer one side shifting.
First invention is owing to import one side that is arranged on said air velocity transducer in said fan; And between this air velocity transducer and said fan, be provided with cowling panel; So the air-flow of the reverse flow that is produced by fan is blocked by said cowling panel, can not be to air velocity transducer one side shifting.Therefore near air velocity transducer, can not produce disorder in the flowing fluid, form stable air-flow, so measuring wind exactly.
Description of drawings
Fig. 1 is the amplification stereogram of first embodiment of first invention of expression.
Fig. 2 is the structural drawing of first embodiment of first invention of expression.
Fig. 3 is the vertical view of second embodiment of first invention of expression.
Fig. 4 is the amplification stereogram of first existing example of invention of expression.
Fig. 5 is the vertical view of the 3rd embodiment of second invention of expression.
Fig. 6 is the amplification profile diagram of the major part of presentation graphs 5.
Fig. 7 is the III-III line cut-open view of an air-breathing effluent road branching portion 133.
Fig. 8 is the front amplification view of the 4th embodiment of second invention of expression, is equivalent to Fig. 6.
Fig. 9 is the key diagram of the smoke detector major part of the 3rd invention.
Figure 10 (a) is the stereographic map of the nozzle of the 3rd invention use, and Figure 10 (b) is the stereographic map after extending the nozzle of Figure 10 (a).
Embodiment
With Fig. 1, Fig. 2 first embodiment of first invention is described.
Smoke detector S comprise through pipe arrangement 20 be connected sampling with the inspection cigarette portion 22 on the pipe arrangement 11, be arranged on inflow entrance 22a one side of said inspection cigarette portion 22 filtrator 23, attract to take a sample the fan (fan blower) 12, the said sampling of measurement of air SA in pipe arrangement 11 with the air velocity transducer (flow sensor) 15 of the sampling air SA wind speed in the pipe arrangement 11 in said sampling.
Though not expression among the figure, in said inspection cigarette portion 22, be provided with photo detectors (smoke sensor) such as light-emitting component and photodiode, light collector, collector lens, hole, or the like.
Box shape is substantially made by inflow portion 40; The inlet (not expression among the figure) of sampling air is extracted in configuration in the side; Dispose the attraction mouth 12a of said fan 12 in the bottom surface; In said inflow portion 40, the airflow direction of the said sampling air SA of said fan 12 imports one side is with vertical by the said airflow direction SB cardinal principle that attracts mouthful 12a to form of said fan 12.Between import one side (upper reaches one side) of said fan 12 and said air velocity transducer 15, be provided with cowling panel 25.Said cowling panel 25 is made substantially rectangle (for example, width is about 50mm, highly is about 10mm), and itself and bottom surface angulation α (for example about 90 °) are with the airflow direction angulation θ (for example about 90 °) of the air SA that takes a sample.
The inventor has carried out comparative experiments to situation of cowling panel 25 that in inflow portion 40, is provided with as shown in Figure 1 and situation that cowling panel 25 is not set; Can confirm: if configuration cowling panel 25, then there is proportional relation from little air quantity in the output of air velocity transducer 15 to big air quantity.That is, cowling panel 25 stops that the reverse flow air-flow L that follows fan 12 to attract the minimizing of air quantity and produce is to air velocity transducer 15 1 side shiftings.For the influence that prevents to attract the reverse flow airflow convection speed of mouthful 12a to measure from fan 12, the angle [alpha] of this cowling panel 25, θ according to the different set of fan 12 in about 45 °～90 ° scope.
In addition, the shape of said cowling panel 25 also can be square or triangle except being roughly rectangle, in the scope that can bring into play said function, can suitably select size etc.
Said cowling panel 25 on being arranged on the bottom surface, for example also can be arranged on end face etc., also can on bottom surface and end face, all be provided with, or be arranged on a plurality of positions.In addition, owing to can be configured in both sides (for example below the about 30mm of distance) to air velocity transducer 15 with attraction mouthful 12a near cowling panel 25, so can make inflow portion 40 enough little.
Action in the face of first embodiment describes down.
After the drive fan 12, the air of monitored space is inhaled into sampling with in the pipe arrangement 11, and sampling air SA flows in this takes a sample with pipe arrangement 11.
At this moment, said sampling air SA is after having measured wind speed by air velocity transducer 15, and the limit rotates in the fan 12 from attracting a mouthful 12a, and discharge from escape hole 12b on the limit, and part sampling air SA enters into inspection cigarette portion 22 through pipe arrangement 20, filtrator 23.After in this inspection cigarette portion 22, carrying out the detection of cigarette, turn back to said sampling with in the pipe arrangement 11 by smoke sensor (do not have among the figure expression).
Under the few situation of the air quantity that attracts (when hanging down wind speed), because of the rotation of the moving blade in the fan 12, it is disorderly that the air-flow of import one side line of fan 12 becomes, and produces reverse flow air-flow L.This reverse flow air-flow L attempts to expand to sampling with the upper reaches one side in the pipe arrangement 11, but because one side disposes cowling panel 25 at the upper reaches, so collide with this cowling panel 25.Therefore, this reverse flow air-flow L can not arrive near the air velocity transducer 15, so near this air velocity transducer 15, can in process fluid flow, not produce disorder, is stable air-flow, so can detect wind speed exactly.Therefore, can control fan 12 exactly according to the measured value of air velocity transducer 15, so, can carry out the detection of cigarette accurately according to designing requirement offering inspection cigarette portion 22 with taking a sample air-stable.In addition, can be arranged on position to air velocity transducer 15 with an attraction mouthful 12a, fully realize miniaturization near cowling panel 25.
With Fig. 3 second embodiment of first invention is described, with Fig. 1, Reference numeral that Fig. 2 is identical, its title is also identical with function.
The difference of this second embodiment and first embodiment is to be bearing in cowling panel 25 on the bottom surface or end face of inflow portion 40 with rotary mode through bolster p.Like this, can be according to the output of the revolution or the air velocity transducer 15 of fan 12, set cowling panel 25 for and stop the most effectively certain angle θ of reverse flow air-flow L, so even under the frequent situation about changing of wind speed, also can carry out the detection of cigarette accurately.
With Fig. 5, Fig. 6 the 3rd embodiment of second invention is described.
As shown in Figure 5, smoke detector 101 comprises: have the cigarette detecting unit 102 of camera bellows 121, the fan 103 that is transported to this cigarette detecting unit 102 as air (sampling air) SA of detected object, as the pipe arrangement 104 of air duct, be configured in photo detectors 112 such as light-emitting component 111 in the cigarette detecting unit 102, photodiode, measure the air flow sensor 113 of said fan 103 or air mass flow, to the power supply unit 114 of these air flow sensor 113 power supplies, be connected the fire judging part 115 on the photo detector 112.
Central part at the camera bellows 121 of cigarette detecting unit 102 is provided with inspection cigarette portion 125, is somebody's turn to do the cigarette portion 125 that examines to the sampling air SA importing after filtering through said pipe arrangement 104 usefulness filtrators 105.Light collector 123 is arranged on the light shielding part 122, and collector lens representes that with 124 the hole is represented with 126.
Fire judging part 115 comprises: the amplifying circuit that the output signal S of photo detector 112 is amplified, the signal of this amplifying circuit is converted to the A/D converter that detects level, reaches the comparison circuit that pre-set threshold is judged breaking out of fire when above detecting level; Or the like, carry out Comprehensive Control with CPU.
Form the air entry 133a of a said air-breathing effluent road branching portion 133 at the front end position that curves L shaped outstanding pipe 133P, the front end position of this outstanding pipe 133P towards with the opposite direction (downstream one side) of flow direction C of the sampling air SA that in gas flow tube P, flows.In addition; Form the exhausr port 132a of said exhaust one effluent road fluidic junction 132 at the front end position that curves L shaped outstanding pipe 132P, the front end position of this outstanding pipe 132P towards with the opposite direction (downstream one side) of flow direction C of the sampling air SA that in gas flow tube P, flows.Therefore, said air entry 133a and said exhausr port 132a are towards identical direction.
The camera bellows 121 of cigarette detecting unit 102 is arranged on outlet one side of said fan 103; The inflow entrance 133c of the inspection cigarette portion 125 of this camera bellows 121 is connected through filtrator 105 on the air entry 133a of a said air-breathing effluent road branching portion 133, and its flow export 132c is connected on the exhausr port 132a of said exhaust one effluent road fluidic junction 132.
Action in the face of the 3rd embodiment describes down.
After the drive fan 103; Air A in the monitored space is inhaled into gas flow tube P through stopple coupon (omitting among the figure); Discharge through fan diffuser portion 120; And this moment is because the flow velocity in the exhaust one effluent road fluidic junction 132 in the said fan diffuser portion 120 is different with the flow velocity in the air-breathing effluent road branching portion 133, so between two positions, produce pressure differential.
Utilize this pressure differential that produces; Contained smoke particle among the sampling air SA that in fan diffuser portion 120, flows is attracted by the air entry 133a from an air-breathing effluent road branching portion 133, gets into the inflow entrance 133c of inspection cigarette portion 125 through filtrator 105; The laser of illuminated light-emitting component 111; And the limit produces the scattering plain edge and in this inspection cigarette portion 125, advances, and from the exhausr port 132a of flow export 132c through exhaust one effluent road fluidic junction 132, turns back in the fan diffuser portion 120.
Contain dust F etc. among the sampling air SA that in said gas flow tube P, flows, but because this dust F geometric ratio smoke particle is heavy, so have big inertial force and flow further downstream to flow direction.Therefore different through near the dust F the said air entry 133a etc. with the lightweight smoke particle among the sampling air SA that is mixed in inhale mouth 133a; Because its advanced downstream in gas flow tube 4; So do not have dust F etc. to sneak into from air entry 133a, maybe can import considerably less sampling air SA.Therefore be deposited in dust F on the filtrator 105 etc. and compare with existing situation and reduce significantly, so can reduce cleaning or change the number of times of this filtrator etc.
Fig. 7 is the III-III line cut-open view of an air-breathing effluent road branching portion 133.
The outstanding pipe 133P of an air-breathing effluent road branching portion 133 makes L shaped; The air entry 133a of its leading section is one side towards downstream; But this leading section is not and the flow direction C fully opposite (axle center and flow direction C are consistent) of sampling air SA that angle [alpha] for example tilts 10 °.This angle is that the foreign matter that prevents that can prevent to sneak into foreign matter such as dust F gets into angle, and the scope of angle beta, γ for example can suitable selection in the scope of 0 ° (consistent with said flow direction C)～45 °.
With Fig. 8 the 4th embodiment of second invention is described, the Reference numeral identical with Fig. 6～Fig. 7, its title, function are also identical.
The difference of the 4th embodiment and the 3rd embodiment is following.
(1) spray orifice 136 is set and substitutes fan diffuser portion 120 as producing Differential Pressure Unit.This spray orifice 136 is arranged between the air-breathing effluent road branching portion 133 and exhaust one effluent road fluidic junction 132 of gas flow tube P.
(2) be arranged on an air-breathing effluent road branching portion 133 upper reaches one side of exhaust one effluent road fluidic junction 132, substitute and be arranged on its downstream one side.
In the 4th embodiment, be blended into dust F among the sampling air SA in the gas flow tube P etc. and utilize its inertial force, be difficult to change in the opposite direction from the direction of main flow air-flow.Therefore reduced dust F etc. and sneaked into air entry 133a,, can prolong the life-span of filtrator, and also can reduce the erroneous detection of the fire judging part that causes because of dust F etc. so compare with existing situation.
Describe with reference to the 5th embodiment of accompanying drawing the 3rd invention.
Fig. 9 is the embodiment of the smoke detector of the 3rd invention; Smoke detector 201 is connected gas flow tube 202 on the stopple coupon; Said stopple coupon configuration does not have in the monitored space of expression in the drawings; Upstream portion (import one side) configuration fan 203 (for example fan blower) in this gas flow tube 202; As air SA suction and the discharge of taking a sample,, make the contaminated air in the monitored space from the part of the sampling air SA of said fan 203 discharges, promptly examine cigarette portion 204 as the sampling air SA inflow of detected object at downstream portion (exporting a side) the formation stream branching portion 205 of said gas flow tube 202.
On said stream branching portion 205; Connection flows into pipe arrangement 206 the sampling air as the sampling air SA circulation of detected object; An end that flows into this sampling air with pipe arrangement 206 is connected on the inflow entrance 208 of the sampling air SA that examines cigarette portion 204, and inspection cigarette portion 204 inside are equipped with: filtrator 207; The optical profile type smoke detecting apparatus that constitutes by light-emitting component and photo detector of expression not among the figure; And the cigarette detecting unit that constitutes by device of Measurement of Air flow etc.
On the other hand; One end of discharging the sampling air with pipe arrangement 210 is connected on the flow export 209 of the sampling air SA that examines cigarette portion 204; Discharging stream fluidic junction, be connected than near the low blow vent 203a of the stream branching portion pressure that waits the moving blade surrounding edge of said fan 203 with pipe arrangement 210 other ends through the sampling air of this inspection cigarette portion 204.
Stream fluidic junction 211 has: the blow vent 203a of fan 203, and its forms than sampling air and discharges with the big opening of pipe arrangement 210; And nozzle 212; Its end is connected the sampling air and discharges with on the pipe arrangement 210; The other end has the blow vent 203a opening much at one with fan 203, can use the even air-flow of expansion almost with respect to the blow vent 203a of fan 203, sprays sampling air SA.
Therefore the pressure loss of the branching portion air-flow of examining cigarette portion 204 can be reduced to have, and stable the converging of sampling airflow from the gas flow tube 202 that the sampling airflow and the fan 203 of 204 discharges of inspection cigarette portion attract can be made.
With Figure 10 an example of said nozzle 212 is described.Shown in Figure 10 (a); Discharging the openend that forms stream fluidic junction 211 with the other end of pipe arrangement 210 through the sampling air of inspection cigarette portion 204; Be provided with urceolus 213; Said urceolus 213 has the opening W1 identical substantially with the opening diameter of the blow vent 203a of fan 203, so this urceolus 213 can be resized to the big opening W2 of opening than the blow vent 203a of fan 203 to the injection orifice of nozzle 212 through making the form that can stretch shown in Figure 10 (b).
For stable and almost uniform airflow offer blow vent 203a, can make the shape of expansion gradually to the front end of nozzle 212.
In addition in an embodiment, the inside of urceolus 213 be equipped with can about flexible inner core 214, through inserting stop hole 216 to jigs such as rivet 215, can make opening W1 or W2 width for regulation.
The nozzle that can stretch in addition, is not limited to the structure of the above embodiment.
P1 is an air inflow aperture among the figure, and P2 is an air outlet.
Claims (2)
1. smoke detector, it comprises:
Be connected sampling with the inspection cigarette portion on the pipe arrangement;
Be attracted to this sampling to the sampling air with the fan in the pipe arrangement;
Measure the air velocity transducer of said sampling with the sampling air wind speed in the pipe arrangement;
It is characterized in that,
Said smoke detector has inflow portion; Box shape is substantially made by said inflow portion; Extract the inlet of said sampling air in side configuration, dispose the attraction mouth of said fan in the bottom surface, in said inflow portion; The airflow direction of the airflow direction of the said sampling air of said fan inlet one side and the attraction interruption-forming of said fan is vertical basically
In said inflow portion, be provided with said air velocity transducer and cowling panel,
Said air velocity transducer is arranged on import one side of said fan; And between this air velocity transducer and said fan, be provided with said cowling panel; Said cowling panel is arranged on the bottom surface of said inflow portion, is used to stop that the reverse flow air-flow that is produced by said fan is to said air velocity transducer one side shifting.
2. smoke detector, it comprises:
Be connected sampling with the inspection cigarette portion on the pipe arrangement;
Be attracted to this sampling to the sampling air with the fan in the pipe arrangement;
Measure the air velocity transducer of said sampling with the sampling air wind speed in the pipe arrangement;
It is characterized in that said air velocity transducer is arranged on import one side of said fan, and between the attraction mouth of this air velocity transducer and said fan, be provided with cowling panel,
Said smoke detector has inflow portion, and said inflow portion attracts the said sampling air of said fan inlet one side through the attraction mouth of said fan,
Said cowling panel is bearing on the bottom surface or end face of said inflow portion with the mode that can rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110104049.8A CN102243797B (en) | 2008-03-21 | 2009-03-04 | smoke detector |
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-073492 | 2008-03-21 | ||
| JP2008073492 | 2008-03-21 | ||
| JP2008073492A JP5009208B2 (en) | 2008-03-21 | 2008-03-21 | smoke detector |
| JP2008-085505 | 2008-03-28 | ||
| JP2008085505A JP5026320B2 (en) | 2008-03-28 | 2008-03-28 | smoke detector |
| JP2008085505 | 2008-03-28 | ||
| JP2008090580A JP2009245138A (en) | 2008-03-31 | 2008-03-31 | Smoke sensor |
| JP2008-090580 | 2008-03-31 | ||
| JP2008090580 | 2008-03-31 |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110104049.8A Division CN102243797B (en) | 2008-03-21 | 2009-03-04 | smoke detector |
| CN2011101040341A Division CN102176273A (en) | 2008-03-21 | 2009-03-04 | Smoke detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101540088A CN101540088A (en) | 2009-09-23 |
| CN101540088B true CN101540088B (en) | 2012-06-13 |
Family
ID=41123259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101181380A Active CN101540088B (en) | 2008-03-21 | 2009-03-04 | Smoke detector |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5009208B2 (en) |
| CN (1) | CN101540088B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958032B (en) * | 2010-09-27 | 2012-05-23 | 江苏大学 | Wireless sensor smoke detection device for fire protection |
| KR101113012B1 (en) * | 2011-10-04 | 2012-02-16 | 주식회사 씨플러스 | Smoke detection device for duct |
| CN103093574A (en) * | 2013-01-08 | 2013-05-08 | 中国科学技术大学 | Active inspiration type point type photoelectric smoke detector |
| KR101407997B1 (en) | 2013-05-06 | 2014-06-18 | 대우조선해양 주식회사 | duct damper including smoke detector for vessels |
| US10161837B2 (en) * | 2013-10-16 | 2018-12-25 | Xtralis Technologies Ltd. | Aspirated particle detection with various flow modifications |
| CN104597207B (en) * | 2015-01-04 | 2016-06-01 | 深圳市查知科技有限公司 | Aspirated smoke detection system |
| CN110853291B (en) * | 2019-11-15 | 2021-07-27 | 安徽环嘉天一再生资源有限公司 | Renewable resource plant safety monitoring system based on big data |
| CN112748051B (en) * | 2020-12-23 | 2023-06-23 | 天津智易时代科技发展有限公司 | Negative pressure type oil smoke probe and detection method thereof |
| CN112669560B (en) * | 2020-12-30 | 2022-04-12 | 中汇宏飞智能科技无锡有限公司 | Production safety inspection alarm device |
| US11761875B2 (en) * | 2021-06-01 | 2023-09-19 | Honeywell International Inc. | Adjusting for air flow temperature changes in an aspirating smoke detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000509535A (en) * | 1996-05-03 | 2000-07-25 | ビジョン・プロダクツ・プロプライエタリー・リミテッド | Detection of floating contaminants |
| GB2347541A (en) * | 1999-03-04 | 2000-09-06 | Pittway Corp | Smoke detector for a duct |
| CN1485609A (en) * | 2002-08-22 | 2004-03-31 | ��֪����ʽ���� | Electrophoretic apparatus,electronic instrument |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3448157B2 (en) * | 1996-05-23 | 2003-09-16 | 中国電力株式会社 | Probe tube for gas sampling |
| JP2001183267A (en) * | 1999-12-28 | 2001-07-06 | Ishikawajima Harima Heavy Ind Co Ltd | Exhaust gas sampling apparatus |
| JP2004089898A (en) * | 2002-09-02 | 2004-03-25 | Hyogo Prefecture | Method and apparatus for isolating suspended particle in fluid |
| JP2005338044A (en) * | 2004-05-31 | 2005-12-08 | Hitachi Ltd | Hazardous particulate collector |
-
2008
- 2008-03-21 JP JP2008073492A patent/JP5009208B2/en not_active Expired - Fee Related
-
2009
- 2009-03-04 CN CN2009101181380A patent/CN101540088B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000509535A (en) * | 1996-05-03 | 2000-07-25 | ビジョン・プロダクツ・プロプライエタリー・リミテッド | Detection of floating contaminants |
| GB2347541A (en) * | 1999-03-04 | 2000-09-06 | Pittway Corp | Smoke detector for a duct |
| CN1485609A (en) * | 2002-08-22 | 2004-03-31 | ��֪����ʽ���� | Electrophoretic apparatus,electronic instrument |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平8-202970A 1996.08.09 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101540088A (en) | 2009-09-23 |
| JP2009230342A (en) | 2009-10-08 |
| JP5009208B2 (en) | 2012-08-22 |
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