EP1975896A3 - Smoke detector and sampling air supplying method for smoke detector - Google Patents

Smoke detector and sampling air supplying method for smoke detector Download PDF

Info

Publication number
EP1975896A3
EP1975896A3 EP08251196A EP08251196A EP1975896A3 EP 1975896 A3 EP1975896 A3 EP 1975896A3 EP 08251196 A EP08251196 A EP 08251196A EP 08251196 A EP08251196 A EP 08251196A EP 1975896 A3 EP1975896 A3 EP 1975896A3
Authority
EP
European Patent Office
Prior art keywords
smoke detection
gas flow
smoke detector
pipe
detection portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08251196A
Other languages
German (de)
French (fr)
Other versions
EP1975896B1 (en
EP1975896A2 (en
Inventor
Hiroyuki c/oNohmi Bosai Ltd. Yokota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nohmi Bosai Ltd
Original Assignee
Nohmi Bosai Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nohmi Bosai Ltd filed Critical Nohmi Bosai Ltd
Publication of EP1975896A2 publication Critical patent/EP1975896A2/en
Publication of EP1975896A3 publication Critical patent/EP1975896A3/en
Application granted granted Critical
Publication of EP1975896B1 publication Critical patent/EP1975896B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Abstract

In order to enable supply of a sampling air to a smoke detection portion at a stable flow velocity, the present invention provides a smoke detector including: a black box (21) including a smoke detection portion (25) having an inflow port and an outflow port; a sampling pipe (30) laid in a monitor space; a gas flow pipe (P) connected to the sampling pipe and which houses a fan (3) therein; a flow path branching portion (33) provided to the gas flow pipe on a secondary side of the fan and connected to the inflow port of the smoke detection portion; and a flow path merging portion (32) which is provided to the gas flow pipe on the secondary side of the fan and connected to the outflow port of the smoke detection portion, and at which a pressure of a fluid flowing through the gas flow pipe is lower than a fluid flowing through the gas flow pipe at the flow path branching portion. Such pressure difference ensures that a constant flow rate is maintained in the smoke detection portion, thereby enabling a reliable smoke detection.
EP08251196A 2007-03-30 2008-03-28 Smoke detector and sampling air supplying method for smoke detector Not-in-force EP1975896B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007091276A JP4932567B2 (en) 2007-03-30 2007-03-30 Smoke detector and sampling air supply method thereof

Publications (3)

Publication Number Publication Date
EP1975896A2 EP1975896A2 (en) 2008-10-01
EP1975896A3 true EP1975896A3 (en) 2009-03-18
EP1975896B1 EP1975896B1 (en) 2010-05-05

Family

ID=39535800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08251196A Not-in-force EP1975896B1 (en) 2007-03-30 2008-03-28 Smoke detector and sampling air supplying method for smoke detector

Country Status (7)

Country Link
EP (1) EP1975896B1 (en)
JP (1) JP4932567B2 (en)
KR (1) KR101391550B1 (en)
CN (1) CN101275910B (en)
AU (1) AU2008201308B2 (en)
DE (1) DE602008001120D1 (en)
TW (1) TWI437513B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108837651A (en) * 2018-06-24 2018-11-20 江苏兰丰环保科技有限公司 A kind of desulphurization denitration dedusting collaboration processing unit

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8098166B2 (en) * 2009-04-23 2012-01-17 Honeywell International Inc. Variable air speed aspirating smoke detector
CA2764010C (en) * 2009-06-05 2018-07-10 Xtralis Technologies Ltd Gas detector apparatus
JP5280347B2 (en) * 2009-12-17 2013-09-04 能美防災株式会社 Photoelectric smoke detector
CN101763708B (en) * 2009-12-28 2012-01-18 公安部沈阳消防研究所 Wind pipe smoke-sensing fire detector
CN101958032B (en) * 2010-09-27 2012-05-23 江苏大学 Wireless sensor smoke detection device for fire protection
US8952821B2 (en) 2012-04-29 2015-02-10 Valor Fire Safety, Llc Smoke detector utilizing ambient-light sensor, external sampling volume, and internally reflected light
US9140646B2 (en) 2012-04-29 2015-09-22 Valor Fire Safety, Llc Smoke detector with external sampling volume using two different wavelengths and ambient light detection for measurement correction
US8907802B2 (en) 2012-04-29 2014-12-09 Valor Fire Safety, Llc Smoke detector with external sampling volume and ambient light rejection
CN103063614A (en) * 2013-01-04 2013-04-24 吉林大学 Laser type extinction smoke meter system for measuring smoke intensity of tail gas of diesel engine
JP6407295B2 (en) 2013-10-30 2018-10-17 ヴァラー ファイヤー セーフティー， エルエルシー Smoke detector with external sampling volume and ambient light rejection
CN109030295A (en) * 2018-08-30 2018-12-18 安徽乐锦记食品有限公司 A kind of bread processing anomaly alarming device smog extraction detection device
US11506586B2 (en) 2020-08-17 2022-11-22 Carrier Corporation Photoelectric smoke sensor tube
CN115240358A (en) * 2022-05-25 2022-10-25 中国船舶重工集团公司第七0三研究所 A formula of breathing in smoke is felt and is surveyed structure for smog concentration detection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678487A (en) * 1971-02-08 1972-07-18 Environment One Corp Multi-zone incipient or actual fire and/or dangerous gas detection system
US5103212A (en) * 1989-07-03 1992-04-07 Worcester Polytechnic Institute Balanced fluid flow delivery system
GB2347541A (en) * 1999-03-04 2000-09-06 Pittway Corp Smoke detector for a duct
US20040035184A1 (en) * 2002-08-22 2004-02-26 Naoto Yamano Sampling tube-type smoke detector

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5851392A (en) * 1981-09-24 1983-03-26 Fujitsu Ltd File copying system
JP3312712B2 (en) 1995-01-31 2002-08-12 ホーチキ株式会社 Optimal threshold setting method for high-sensitivity smoke detector
JP3648307B2 (en) * 1995-11-24 2005-05-18 日本フエンオール株式会社 Smoke detection system
US5926098A (en) * 1996-10-24 1999-07-20 Pittway Corporation Aspirated detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678487A (en) * 1971-02-08 1972-07-18 Environment One Corp Multi-zone incipient or actual fire and/or dangerous gas detection system
US5103212A (en) * 1989-07-03 1992-04-07 Worcester Polytechnic Institute Balanced fluid flow delivery system
GB2347541A (en) * 1999-03-04 2000-09-06 Pittway Corp Smoke detector for a duct
US20040035184A1 (en) * 2002-08-22 2004-02-26 Naoto Yamano Sampling tube-type smoke detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108837651A (en) * 2018-06-24 2018-11-20 江苏兰丰环保科技有限公司 A kind of desulphurization denitration dedusting collaboration processing unit

Also Published As

Publication number Publication date
JP2008250684A (en) 2008-10-16
CN101275910B (en) 2011-06-08
KR20080089167A (en) 2008-10-06
TW200901093A (en) 2009-01-01
EP1975896B1 (en) 2010-05-05
EP1975896A2 (en) 2008-10-01
KR101391550B1 (en) 2014-05-07
JP4932567B2 (en) 2012-05-16
AU2008201308B2 (en) 2011-07-28
TWI437513B (en) 2014-05-11
AU2008201308A1 (en) 2008-10-16
DE602008001120D1 (en) 2010-06-17
CN101275910A (en) 2008-10-01

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