JP2009245138A - Smoke sensor - Google Patents

Smoke sensor Download PDF

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Publication number
JP2009245138A
JP2009245138A JP2008090580A JP2008090580A JP2009245138A JP 2009245138 A JP2009245138 A JP 2009245138A JP 2008090580 A JP2008090580 A JP 2008090580A JP 2008090580 A JP2008090580 A JP 2008090580A JP 2009245138 A JP2009245138 A JP 2009245138A
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Prior art keywords
fan
pipe
smoke
sampling
air
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JP2008090580A
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Japanese (ja)
Inventor
Hiroyuki Yokota
博之 横田
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Nohmi Bosai Ltd
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Nohmi Bosai Ltd
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Application filed by Nohmi Bosai Ltd filed Critical Nohmi Bosai Ltd
Priority to JP2008090580A priority Critical patent/JP2009245138A/en
Priority to KR1020090011302A priority patent/KR101529735B1/en
Priority to CN201110104049.8A priority patent/CN102243797B/en
Priority to CN2011101040341A priority patent/CN102176273A/en
Priority to CN2009101181380A priority patent/CN101540088B/en
Priority to AU2009200921A priority patent/AU2009200921B2/en
Priority to US12/382,390 priority patent/US8089366B2/en
Priority to EP20100005736 priority patent/EP2221787B1/en
Priority to EP20090250784 priority patent/EP2112638B1/en
Priority to TW98109176A priority patent/TWI437514B/en
Publication of JP2009245138A publication Critical patent/JP2009245138A/en
Priority to US13/089,760 priority patent/US8077018B2/en
Priority to US13/089,730 priority patent/US8106785B2/en
Pending legal-status Critical Current

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  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a smoke sensor allowing stable supply of air discharged from a smoke detection part from a vent hole of a fan interposed in an air current pipe through a flow passage confluence part. <P>SOLUTION: This smoke sensor 1 is provided with: the smoke detection part 4 having an inflow port 8 and an outflow port 9; the air current pipe 2 connected to a sampling pipe laid in a monitoring space, interposing the fan 3; a flow passage branch part 5 formed in the air current pipe 2, and connected to the inflow port 8 of the smoke detection part 4; and the flow passage confluence part 11 formed in the air current pipe 2, and connected to the outflow port 9 of the smoke detection part 4 through a sampling air-discharging line 10. The flow passage confluence part 11 has a nozzle part 12 having an opening larger than the sampling air-discharging line 10, for performing jetting to the vent hole 3a having a pressure lower than the flow passage branch part 5 of the fan 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、火災により発生する空気中に浮遊する煙等の汚染物質を光学的に検知し、火災を報知する煙感知器に関するものである。   The present invention relates to a smoke detector that optically detects pollutants such as smoke floating in the air generated by a fire and notifies the fire.

火災予防や煙発生時の検知システムとして、或いは、一定の環境保全を必要とする半導体製造工場や食品工場において、煙感知器が使用されている。   Smoke detectors are used as a fire prevention and smoke detection system, or in semiconductor manufacturing factories and food factories that require certain environmental protection.

従来の煙検出システムは、入口マニホールドはファンの吸入口に接続されている。このファンは空気をパイプを介して入口マニホールドに吸引させる。
ファンを通る全空気流れのうち、サンプリング目的で使用される非常に小さな割合を除き、ファンからの出口は排気ラインを介して大気に直接あるいは排気パイプに排気される。
そして、サンプリング目的に使用される流れの部分は、フィルタを通過して、煙検出器の検出チャンバーの入口に入る。検出チャンバーの出口は入口マニホールドに接続されていた。（特許文献１） In conventional smoke detection systems, the inlet manifold is connected to the fan inlet. This fan draws air into the inlet manifold through a pipe.
Except for a very small percentage of the total air flow through the fan that is used for sampling purposes, the outlet from the fan is exhausted directly to the atmosphere via an exhaust line or to an exhaust pipe.
The portion of the flow used for sampling purposes then passes through the filter and enters the detection chamber inlet of the smoke detector. The outlet of the detection chamber was connected to the inlet manifold. (Patent Document 1)

特表２０００−５０９５３５公報Special Table 2000-509535

従来の煙検出システムは、入口マニホールドはファンの吸入口に接続されている。このファンは空気をパイプを介して入口マニホールドに吸引させる。ファンを通る全空気流れのうちサンプリング目的で使用される非常に小さな割合を除き、ファンからの出口は排気ラインを介して大気に直接あるいは排気パイプに排気される。   In conventional smoke detection systems, the inlet manifold is connected to the fan inlet. This fan draws air into the inlet manifold through a pipe. Except for a very small percentage of the total air flow through the fan that is used for sampling purposes, the outlet from the fan is exhausted directly to the atmosphere via an exhaust line or to an exhaust pipe.

そして、サンプリング目的で使用される流れの部分は、フィルタを通過して、煙検出器の検出チャンバーの入口に入る。検出チャンバーの出口は入口マニホールドに接続されていた。ただし、接続部分の開口が小さく、サンプリング用の分岐部の流れの圧力損失が大きくなっていた。   The portion of the stream used for sampling purposes then passes through the filter and enters the detection chamber inlet of the smoke detector. The outlet of the detection chamber was connected to the inlet manifold. However, the opening of the connecting portion was small, and the pressure loss of the flow at the sampling branch was large.

この発明は、上記の事情に鑑み、検煙部を有する分岐部流れの圧力損失を小さくするとともに、検煙部から排出されたサンプリング空気流れと、ファンが吸引した気流管のサンプリング空気流れと、を安定して合流させることができるようにすることを目的とする。   In view of the above circumstances, the present invention reduces the pressure loss of the branch portion flow having the smoke detecting portion, the sampling air flow discharged from the smoke detecting portion, the sampling air flow of the airflow pipe sucked by the fan, It aims at enabling it to be made to join together stably.

この発明は流入口と流出口とを有する検煙部と、監視空間に敷設されたサンプリング管と、該サンプリング管に連結され、ファンを介在する気流管と、該気流管に設けられ、前記検煙部の流入口に連結された流路分岐部と、前記気流管に設けられ、前記検煙部の流出口に排出用配管を介して連結された流路合流部とを設ける煙感知器において、前記流路合流部は、前記ファンの前記流路分岐部より圧力が低い通気口に対して噴射する前記排出用配管より大きい開口を有するノズル部を設けることを特徴とする煙感知器としたことである。   The present invention provides a smoke detector having an inlet and an outlet, a sampling pipe laid in a monitoring space, an airflow pipe connected to the sampling pipe and interposing a fan, and provided in the airflow pipe. In a smoke detector, comprising: a flow path branch portion connected to an inlet of a smoke portion; and a flow passage junction portion provided in the airflow pipe and connected to an outlet of the smoke detector portion via a discharge pipe. The smoke sensor is characterized in that the flow path merging portion is provided with a nozzle portion having an opening larger than the discharge pipe that injects into a vent having a lower pressure than the flow path branching portion of the fan. That is.

また、前記ノズル部の開口が調整可能であることを特徴とする煙感知器としたことである。   Further, the smoke detector is characterized in that the opening of the nozzle portion is adjustable.

この発明は、以上の様に構成したので、流路分岐部と流路合流部との間に発生する圧力差により、気流管内を流れるサンプリング空気の一部は、前記流路分岐部から検煙部内に導入され、前記検煙部を通って流路合流部から前記気流管に戻される。
このとき、検煙部から排出用配管を介して排出されたサンプリング空気が、ファンの流路分岐部より圧力が低い通気口に対してほぼ均一に広がって噴射する排出用配管より大きい開口を有するノズル部を備えた流路合流部を経て合流される。
従って、検煙部を有する分岐部流れの圧力損失を小さくできるので、分岐部流れの流量を増加させることができる。また、検煙部から排出されたサンプリング空気流れと、ファンが吸引した気流管のサンプリング空気流れとを、安定して合流させることができる。 Since the present invention is configured as described above, a part of the sampling air flowing in the airflow pipe is smoked from the flow path branch portion due to the pressure difference generated between the flow path branch portion and the flow path junction portion. It is introduced into the part, passes through the smoke detection part, and is returned from the flow path joining part to the airflow pipe.
At this time, the sampling air discharged from the smoke detection section through the discharge pipe has an opening larger than the discharge pipe for injecting almost uniformly to the vent having a lower pressure than the flow path branching section of the fan. It merges through the flow path confluence | merging part provided with the nozzle part.
Therefore, since the pressure loss of the branch part flow having the smoke detecting part can be reduced, the flow rate of the branch part flow can be increased. Further, the sampling air flow discharged from the smoke detector and the sampling air flow of the airflow pipe sucked by the fan can be stably merged.

さらに、流路合流部のノズルの開口の幅を調整可能とするため、様々な大きさのファンが使用できる。   Furthermore, in order to be able to adjust the width of the nozzle opening of the flow path merging portion, various sizes of fans can be used.

この発明の実施の形態を実施例に基づき図面を参照して説明する。
図１及び図２は、この発明の煙感知器の実施例であり、煙感知器１は、図示していない監視空間に配置したサンプリング管に気流管２を接続し、該気流管２の上流部（１次側）に監視空間の汚染空気を、サンプリング空気Ａとして吸引及び排出するファン３（例えば、ブロアファン）を配設し、前記気流管２の下流部（２次側）に、前記ファン３から排出されたサンプリング空気Ａの一部、すなわち、感知対象となるサンプリング空気ＳＡを検煙部４に流入させる流路分岐部５を形成して成る。 Embodiments of the present invention will be described based on examples with reference to the drawings.
1 and 2 show an embodiment of the smoke detector according to the present invention. The smoke detector 1 is connected to a sampling pipe disposed in a monitoring space (not shown) and an air flow pipe 2 is connected upstream of the air flow pipe 2. A fan 3 (for example, a blower fan) that sucks and discharges the contaminated air in the monitoring space as sampling air A is disposed in the section (primary side), and the downstream section (secondary side) of the airflow pipe 2 A part of the sampling air A discharged from the fan 3, that is, a flow path branching portion 5 for allowing the sampling air SA to be detected to flow into the smoke detecting portion 4 is formed.

前記流路分岐部５には、感知対象となるサンプリング空気ＳＡを流通させるサンプリング空気流入用配管６が接続され、該サンプリング空気流入用配管６の一端を、フィルタ７及び図示されていない発光素子とフォトダイオード受光素子から成る光学的煙検出手段、空気の流量の測定手段等から成る煙検出ユニットを内蔵する検煙部４のサンプリング空気ＳＡの流入口８に接続する。   The flow path branching section 5 is connected to a sampling air inflow pipe 6 through which the sampling air SA to be sensed flows, and one end of the sampling air inflow pipe 6 is connected to a filter 7 and a light emitting element (not shown). It is connected to the inlet 8 of the sampling air SA of the smoke detecting section 4 incorporating a smoke detecting unit comprising an optical smoke detecting means comprising a photodiode light receiving element, an air flow rate measuring means and the like.

一方、検煙部４のサンプリング空気ＳＡの流出口９に、サンプリング空気排出用配管１０の一端を接続し、該検煙部４を通ったサンプリング空気排出用配管１０の他端の流路合流部を、前記ファン３の回転翼の周縁直近などの流路分岐部より圧力が低い通気口３ａに接続する。   On the other hand, one end of the sampling air discharge pipe 10 is connected to the sampling air SA outlet 9 of the smoke detection section 4, and the flow path confluence section at the other end of the sampling air discharge pipe 10 passing through the smoke detection section 4. Is connected to the vent 3a having a pressure lower than that of the flow path branching portion such as near the periphery of the rotor blade of the fan 3.

流路合流部１１は、サンプリング空気排出用配管１０より大きい開口が形成されたファン３の通気口３ａと、一端はサンプリング空気排出用配管１０に接続し、他端はファン３の通気口３ａとほぼ同じ開口を有し、ファン３の通気口３ａに対してほぼ均一に広がる流れをもってサンプリング空気ＳＡを噴射可能なノズル１２を設けて成るものである。
これにより、検煙部４を有する分岐部流れの圧力損出を小さくするとともに、検煙部４から排出されたサンプリング空気流れと、ファン３が吸引した気流管２のサンプリング空気流れと、を安定して合流させることができる。 The flow path junction 11 has a vent 3 a of the fan 3 in which an opening larger than the sampling air discharge pipe 10 is formed, one end connected to the sampling air discharge pipe 10, and the other end connected to the vent 3 a of the fan 3. A nozzle 12 having substantially the same opening and capable of injecting sampling air SA with a flow that spreads substantially uniformly with respect to the vent 3a of the fan 3 is provided.
As a result, the pressure loss of the flow at the branch portion having the smoke detecting section 4 is reduced, and the sampling air flow discharged from the smoke detecting section 4 and the sampling air flow of the airflow pipe 2 sucked by the fan 3 are stabilized. And can be merged.

また、前記ノズル１２の一例を図３により説明する。検煙部４を通ったサンプリング空気排出用配管１０の他端の流路合流部１１を形成する開口端に、図３（ａ）に示す様に、ファン３の通気口３ａの開口径とほぼ同じ開口Ｗ１を有する外筒１３を設けて成るもので、この外筒１３は、図３の（ｂ）に示す様に伸縮可能に形成することによりノズル１２の噴射口の大きさを、ファン３の通気口３ａの開口より大きい開口Ｗ２に調整可能に構成して成るものである。
通気口３ａに安定したほぼ均一流れを供給するために、ノズル１２の先端が徐々に広がる形状にしてもよい。 An example of the nozzle 12 will be described with reference to FIG. As shown in FIG. 3 (a), the opening diameter of the air vent 3a of the fan 3 is substantially the same as the opening diameter of the flow path merging section 11 at the other end of the sampling air discharge pipe 10 passing through the smoke detecting section 4. An outer cylinder 13 having the same opening W1 is provided. The outer cylinder 13 is formed so as to be extendable and contractable as shown in FIG. The opening W2 is larger than the opening of the vent 3a.
In order to supply a stable and almost uniform flow to the vent 3a, the tip of the nozzle 12 may be gradually widened.

なお、実施例では外筒１３の内部に左右に伸縮可能な内筒１４を内蔵させ、リベット等の留め具１５が留め穴１６に差し込まれことで、開口Ｗ１又はＷ２の所定の幅とすることができる。
なお、伸縮可能なノズルが上記実施例のものに限定されるものでない。
図中Ｐ１は空気流入口、Ｐ２は空気排出口である。 In the embodiment, the inner cylinder 14 that can be expanded and contracted to the left and right is built in the outer cylinder 13, and a fastener 15 such as a rivet is inserted into the retaining hole 16, so that the opening W1 or W2 has a predetermined width. Can do.
In addition, the extendable nozzle is not limited to the above-described embodiment.
In the figure, P1 is an air inlet and P2 is an air outlet.

この発明の煙感知器の構成図である。It is a block diagram of the smoke detector of this invention. この発明の要部の説明図である。It is explanatory drawing of the principal part of this invention. 図（ａ）は、本発明に用いるノズルの斜視図であり、図（ｂ）は図（ａ）のノズルを伸ばした斜視図である。Fig. (A) is a perspective view of a nozzle used in the present invention, and Fig. (B) is a perspective view in which the nozzle of Fig. (A) is extended.

符号の説明Explanation of symbols

１ 煙感知器
２ 気流管
３ ファン
３ａ 通気口
４ 検煙部
５ 流路分岐部
６ サンプリング空気流入用配管
７ フィルタ
８ 流入口
９ 流出口
１０ サンプリング空気排出用配管
１１ 流路合流部
１２ ノズル部 1 Smoke detector 2 Airflow tube 3 Fan 3a Vent
4 Smoke detection section 5 Flow path branch section 6 Sampling air inflow pipe 7 Filter 8 Inlet 9 Outlet 10 Sampling air exhaust pipe 11 Flow path confluence 12 Nozzle section

Claims (2)

流入口と流出口とを有する検煙部と、監視空間に敷設されたサンプリング管に連結され、かつ、ファンを介在する気流管と、該気流管に設けられ、前記検煙部の流入口に連結された流路分岐部と、前記気流管に設けられ、前記検煙部の流出口に排出用配管を介して連結された流路合流部とを設ける煙感知器において、
前記流路合流部は、前記ファンの前記流路分岐部より圧力が低い通気口に対して噴射する前記排出用配管より大きい開口を有するノズル部を設けることを特徴とする煙感知器。 A smoke detector having an inlet and an outlet, an airflow pipe connected to a sampling pipe laid in the monitoring space and interposing a fan, and provided in the airflow pipe, to the inlet of the smoke detector In a smoke detector provided with a connected flow path branching section and a flow path merging section provided in the airflow pipe and connected to an outlet of the smoke detection section via a discharge pipe,
The smoke detector, wherein the flow path merging portion is provided with a nozzle portion having an opening larger than the discharge pipe that injects into a vent having a lower pressure than the flow path branching portion of the fan. 前記ノズル部の開口が調整可能であることを特徴とする請求項１記載の煙感知器。
The smoke detector according to claim 1, wherein an opening of the nozzle portion is adjustable.
JP2008090580A 2008-03-21 2008-03-31 Smoke sensor Pending JP2009245138A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
JP2008090580A JP2009245138A (en) 2008-03-31 2008-03-31 Smoke sensor
KR1020090011302A KR101529735B1 (en) 2008-03-21 2009-02-12 Smoke sensing device
CN201110104049.8A CN102243797B (en) 2008-03-21 2009-03-04 smoke detector
CN2011101040341A CN102176273A (en) 2008-03-21 2009-03-04 Smoke detector
CN2009101181380A CN101540088B (en) 2008-03-21 2009-03-04 Smoke detector
AU2009200921A AU2009200921B2 (en) 2008-03-21 2009-03-10 Smoke detector
US12/382,390 US8089366B2 (en) 2008-03-21 2009-03-16 Smoke detector
EP20100005736 EP2221787B1 (en) 2008-03-21 2009-03-20 Smoke detector
EP20090250784 EP2112638B1 (en) 2008-03-21 2009-03-20 Smoke detector
TW98109176A TWI437514B (en) 2008-03-21 2009-03-20 Smoke sensor
US13/089,760 US8077018B2 (en) 2008-03-21 2011-04-19 Smoke detector
US13/089,730 US8106785B2 (en) 2008-03-21 2011-04-19 Smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008090580A JP2009245138A (en) 2008-03-31 2008-03-31 Smoke sensor

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JP2009245138A true JP2009245138A (en) 2009-10-22

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Application Number Title Priority Date Filing Date
JP2008090580A Pending JP2009245138A (en) 2008-03-21 2008-03-31 Smoke sensor

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101113012B1 (en) 2011-10-04 2012-02-16 주식회사 씨플러스 Smoke detection device for duct
KR101125188B1 (en) * 2011-09-08 2012-03-20 주식회사 엔케이 Smoke detecting apparatus for fire extinguishment
WO2015186847A1 (en) * 2014-06-02 2015-12-10 에너바이오텍(주) Smoke sensing device
US9395345B2 (en) 2010-03-05 2016-07-19 Xtralis Technologies Ltd Dust discrimination for sensing systems

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10253046A (en) * 1997-03-12 1998-09-25 Hitachi Zosen Corp Variable supply amount air nozzle
JP2004078807A (en) * 2002-08-22 2004-03-11 Hochiki Corp Sampling tube type smoke detector
JP2007272582A (en) * 2006-03-31 2007-10-18 Nohmi Bosai Ltd Fire detection device
JP2008543664A (en) * 2005-06-24 2008-12-04 ダイムラー・アクチェンゲゼルシャフト Air blowing nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10253046A (en) * 1997-03-12 1998-09-25 Hitachi Zosen Corp Variable supply amount air nozzle
JP2004078807A (en) * 2002-08-22 2004-03-11 Hochiki Corp Sampling tube type smoke detector
JP2008543664A (en) * 2005-06-24 2008-12-04 ダイムラー・アクチェンゲゼルシャフト Air blowing nozzle
JP2007272582A (en) * 2006-03-31 2007-10-18 Nohmi Bosai Ltd Fire detection device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9395345B2 (en) 2010-03-05 2016-07-19 Xtralis Technologies Ltd Dust discrimination for sensing systems
TWI565937B (en) * 2010-03-05 2017-01-11 愛克斯崔里斯科技有限公司 Sensing systems for detecting particles in an air volume and methods of sensing particles in an air volume
KR101125188B1 (en) * 2011-09-08 2012-03-20 주식회사 엔케이 Smoke detecting apparatus for fire extinguishment
KR101113012B1 (en) 2011-10-04 2012-02-16 주식회사 씨플러스 Smoke detection device for duct
WO2015186847A1 (en) * 2014-06-02 2015-12-10 에너바이오텍(주) Smoke sensing device

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