JPS62206699A - Fire detector by sampling tube - Google Patents
Fire detector by sampling tubeInfo
- Publication number
- JPS62206699A JPS62206699A JP5003286A JP5003286A JPS62206699A JP S62206699 A JPS62206699 A JP S62206699A JP 5003286 A JP5003286 A JP 5003286A JP 5003286 A JP5003286 A JP 5003286A JP S62206699 A JPS62206699 A JP S62206699A
- Authority
- JP
- Japan
- Prior art keywords
- suction
- sampling tube
- flow rate
- suction holes
- fire
- 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
Links
- 238000005070 sampling Methods 0.000 title claims description 39
- 239000000779 smoke Substances 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 25
- 239000011148 porous material Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔ｒｌＩＬ業上の利用分野〕
この発明は警戒地区に配置したサンプリング管を用いて
、煙、熱等を含んでいる空気をサンプリング吸引して火
災を検出するサンプリング管による火災検出装置に関す
るもので、家屋、船舶等の如き主として室内を警戒地区
とする火災の検出に利用できる。[Detailed description of the invention] [Field of application in the rlIL industry] This invention uses a sampling pipe placed in a restricted area to sample and suck air containing smoke, heat, etc. to detect a fire. This relates to a fire detection device and can be used to detect fires mainly indoors, such as in houses, ships, etc.
サンプリング管を用いて火災検出を行う火災検出装置と
して１例えば船艙の火災の検出及び消火に用いるものと
して、各船艙に煙管の夫々の開口さ幻た先端部をのぞま
せ、煙管の夫々の基端部を火災検出部にのぞませ吸引フ
ァンによって船艙の空気に含まれている煙等を火災検出
部によって検出し、火災を検出したときは、煙管を用い
てＣＯ意ガマ或いは粉末などの消火剤を先端部から船艙
に放出して消火を行うようＫｌｌ成したものが知られて
いる。As a fire detection device for detecting fire using sampling tubes 1, for example, as a device used for detecting and extinguishing fires in ship holds, the tip of each smoke pipe is exposed in each ship hold, and the base of each smoke pipe is The fire detector detects smoke, etc. contained in the air in the hold using a suction fan, and when a fire is detected, extinguishes the fire with CO or powder using a smoke pipe. It is known that the fire extinguisher is constructed so that the extinguishing agent is discharged from the tip into the hold of the ship to extinguish the fire.
そして上記公知の火災検出装置は、王として上記の消火
動作に便利であるように、煙管はその途中部には全く孔
が無くて先端部のみを開口しているため、先端部から吸
引された煙等が基端部の火災検出部に到達するまでにか
なりの時間が必要であって、火災の早期検出がむつかし
くなっている。The above-mentioned known fire detection device is convenient for extinguishing the fire as described above, since the smoke pipe has no holes in the middle and only opens at the tip. It takes a considerable amount of time for smoke etc. to reach the fire detection section at the proximal end, making early detection of fire difficult.
この発明は、煙等の火災現象をできるだけ速か疋火災検
出部に到達させることができるように。This invention allows fire phenomena such as smoke to reach the fire detection unit as quickly as possible.
煙等を吸引するサンプリング管に工夫を行ったものであ
って、その構成は、警戒地区（１）の煙等を含んだ空気
を長管によって形成されたサンプリング管（７）によっ
て吸引し、吸引された空気を基端部に設けている火災検
出部（８）にて火災を検出するように構成したサンプリ
ング管による火災検出装置において、サンプリング管（
７）の先端部に煙等を可及的速かに基端部へ送るのに必
要な空気を吸込むための吸込用開口部（５）を設け、か
つ、サンプリング管（７）に長手方向に沿って複数の吸
引小孔（６）を、複数の吸引小孔（６）の夫々の吸引流
量のうち、最小を示す最小吸引流量が吸引小孔（６）の
数に応じて変化するものであって、この最小吸引流量が
最大を示すときの吸引小孔（６）の数が存在し、吸引小
孔（６）のこの数を中心とする所定範囲内の個数に吸引
小孔（６）を設定し、て設けたことを特徴とするサンプ
リング管による火災検出装置である。This is a sampling tube that has been devised to suck smoke, etc., and its configuration is such that the air containing smoke, etc. in the restricted area (1) is sucked through the sampling tube (7) formed by a long tube, and In a fire detection device using a sampling tube, the sampling tube (
7) is provided with a suction opening (5) at the distal end to suck in the air necessary to send smoke, etc. to the proximal end as quickly as possible, and a suction opening (5) is provided in the sampling tube (7) in the longitudinal direction. A plurality of small suction holes (6) are arranged along the line, and the minimum suction flow rate indicating the minimum among the suction flow rates of each of the plurality of small suction holes (6) changes depending on the number of small suction holes (6). Then, there is a number of small suction holes (6) when this minimum suction flow rate shows the maximum, and the number of small suction holes (6) is within a predetermined range centered on this number of small suction holes (6). This is a fire detection device using a sampling tube, which is characterized in that it is set and provided with.
サンプリング管（力の先端部に設けである吸込用開口部
（５）によって、この先端部附近から吸込まれた煙等は
速かに基端部へ送ら幻ることになり、そして、サンプリ
ング管（７）に設けである複数の吸引小孔（６）の数を
、複数の吸引小孔（６）の夫々の吸引流量のうちの最小
吸引流量が最大を示すときの吸引小孔（６）の数を中心
とする成る所定範囲内の個数に設定しているので、吸引
状態の最本良くないところの最小吸引流量を示している
吸引小孔（６）からの吸引量が大きくなり、したがって
基端部には煙等の検出のための充分な流量が吸込まれる
ことＫなって、これによってわづかな製置又は量の煙等
もミスなく確実に検出できることになる。Due to the suction opening (5) provided at the tip of the sampling tube (force), smoke, etc. inhaled from the vicinity of this tip is quickly sent to the proximal end, and then the sampling tube ( The number of the plurality of small suction holes (6) provided in 7) is calculated as follows: Since the number is set within a predetermined range centered on the number, the amount of suction from the small suction hole (6), which indicates the minimum suction flow rate at the worst point in the suction condition, increases, and therefore the Sufficient flow rate for detecting smoke, etc. is sucked into the end portion, so that even small amounts of smoke, etc. can be detected reliably without mistakes.
次にこの発明の実施態様の基本となる実験例を図に基づ
いて説明する。Next, an experimental example that is the basis of the embodiment of the present invention will be explained based on the drawings.
第１図に側面視を例示した警戒地区（１）は、半導体な
どの製品を製造する製造装ｆｌ（２１を収容しているク
リーンルームであって、警戒地区（１）内の空気を換気
装！（３）によって吸引し、空気調和を行ってフィルタ
（４）から警戒地区（１）Ｋ吐出すように構成さ幻でい
る。長管にて形成して先端部に吸込用開口部（５）を設
けると共に、その長手方向に沿って複数の吸引小孔（６
）を設けているサンプリング管（７）を警戒地区（１）
に設け、サンプリング管（力の基端部に設けた火災検出
部（８）Ｋ、吸引ファン（９）によって吸引小孔（６）
から吸引されて火元から発生する煙、熱。The restricted area (1), shown in a side view in Figure 1, is a clean room that houses manufacturing equipment (21) that manufactures products such as semiconductors, and is equipped with a ventilation system to circulate the air within the restricted area (1). (3) to perform air conditioning and discharge K from the guarded area (1) from the filter (4).It is formed with a long pipe and has a suction opening (5) at its tip. along with a plurality of small suction holes (6
) in the caution area (1)
Fire detection part (8) K provided at the proximal end of the sampling tube (power), suction small hole (6) by suction fan (9)
Smoke and heat generated from the source of the fire.
又はガス等（以下これを煙等と略称する）を含んだ空気
が到達できるように設けたものであって、吸込用開口部
（５）の開口面積は、吸引小孔（６）から吸引された煙
等ができるだけ速やかに基端部へ送られるのに必要な空
気を吸込むことができる広さに定め、管径２５１１１で
長さ１０４ｔｔｔのサンプリング管（７）に孔径２ｍ１
１１の複数の吸引小孔（６）を略互に等間隔で設けたも
のについて、サンプリング管（７）の最先端部に設けた
吸引小孔（６）から吸引された煙等が。Or, it is provided so that air containing gas, etc. (hereinafter referred to as smoke, etc.) can reach it, and the opening area of the suction opening (5) is the area that is sucked from the small suction hole (6). A sampling tube (7) with a diameter of 25111 and a length of 104ttt was designed to be wide enough to suck in the air necessary to send smoke, etc. to the proximal end as quickly as possible.
11, in which a plurality of suction holes (6) are provided at approximately equal intervals, smoke etc. are sucked in from the suction holes (6) provided at the tip end of the sampling tube (7).
火災検出部（８）によって検出されるまでの到達時間の
実測結果を吸引小孔（６）の数との関係にて第２因の実
線にて示し、孔径４１ｎＬの吸引小孔（６）の場合を同
図の点線で示したものであって、上記何れの孔径の場合
も、吸引小孔（６）の数が少なくなるに伴つて到達時間
は短かくなっている。又、孔径４電のものが２Ｑのもの
よりも到達時間はやや短かい。The actual measurement result of the arrival time until the fire is detected by the fire detection unit (8) is shown by the solid line of the second factor in relation to the number of small suction holes (6). The case is shown by the dotted line in the figure, and for any of the above hole diameters, the arrival time becomes shorter as the number of small suction holes (6) decreases. Also, the arrival time of the 4-hole hole diameter one is slightly shorter than that of the 2Q hole diameter one.
又、簗２図には、先端部に吸込用開口部（５）を設けて
いないサンプリング管について到達時間を２点鎖線で図
示したが、上述した先端開口部（５）を有しているサン
プリング管（７）は、孔径２ｍ、４ｍ何幻の本のもその
到達時間は先端部が閉じているサンプリング管に比べて
充分に短かくなっている。In addition, in Fig. 2, the arrival time is shown by a two-dot chain line for a sampling tube that does not have a suction opening (5) at its tip, but for a sampling tube that has the aforementioned tip opening (5). The tube (7) has a hole diameter of 2 m or 4 m, and the arrival time is sufficiently shorter than that of a sampling tube with a closed tip.
夫々の吸引小孔（６）の吸引流１ｔ（Ｌ／ｒｎｉ−ｎ）
は共に均等にはならないものであって、成る１本のサン
プリング管（７）に設けである夫々の吸引小孔（６）の
吸引流量のうちの最小を示す最小吸引流量を、吸引小孔
（６）の数を種々変えた場合について第３図に示したが
、吸引小孔（６）の数的４５個のとぎに最大値（財）を
示している。そして、上記夫々の吸引小孔（６）の吸引
流量のうちの最大を示す最大吸引流量を、吸引小孔（６
）の数を種々変えたものについて調べ、吸引小孔（６）
の数を種々変えたものにおける吸引流量の平均値を求め
て、上記最小吸引流量を平均値にて除算した値（最小吸
引流量比）を第４図の実線で、又、上記最大吸引流量を
平均値で除算した値Ｃ＋大吸引流債比）を＠４図の点線
で夫々示したが、吸引小孔（６）の数の少ないサンプリ
ング管（７）の場合は、最小吸引流量比から最大吸引流
量比までの差が極めて大きくなっていて、この場合の夫
々の吸引小孔（６）における吸引流量のバラツキも大き
く、吸引流量が安定しない。Suction flow 1t (L/rni-n) of each suction hole (6)
are not equal, and the minimum suction flow rate indicating the minimum of the suction flow rates of the respective suction holes (6) provided in one sampling tube (7) is defined as the minimum suction flow rate of each suction hole ( Fig. 3 shows cases in which the number of suction holes (6) is varied, and the maximum value is shown at the numerical value of 45 small suction holes (6). Then, the maximum suction flow rate indicating the maximum of the suction flow rates of the respective suction holes (6) is determined by
) with various numbers of suction holes (6).
Calculate the average value of the suction flow rate when the number of The value C divided by the average value + large suction flow rate ratio) is shown by the dotted line in Figure @4, but in the case of a sampling tube (7) with a small number of suction holes (6), the value is calculated from the minimum suction flow rate ratio to the maximum The difference in the suction flow rate ratio is extremely large, and in this case, the variation in the suction flow rate in each small suction hole (6) is also large, and the suction flow rate is not stable.
しかし、＠３図における最小吸引流量の最大値（至）の
約６５憾以上に相当する値を示すときの吸引小孔（６）
の数、即ち、約２４個〜約７０個の範囲では、同図のよ
うに最小吸引流量の吸引小孔（６）の数に対する変化割
合がわづかであり、しかも、＠４図の吸引流量比も、上
記約２４個〜約７０個の吸引小孔（６）の場合には、最
小吸引流量比から最大吸引流量比までの差が小さい値で
あって、この範囲内の吸引小孔（６）であれば、夫々の
吸引小孔（６）毎の吸引流量のバラツキが小さく、安定
した大きい流量の空気をサンプリング管（力の基端部に
同って吸引して送り込むことができるものである。However, when the suction hole (6) shows a value equivalent to about 65 or more of the maximum value (total) of the minimum suction flow rate in Figure @3
, that is, in the range of about 24 to about 70, the rate of change of the minimum suction flow rate with respect to the number of suction holes (6) is small as shown in the same figure, and moreover, the suction flow rate in Figure @4 In the case of about 24 to about 70 suction holes (6), the difference between the minimum suction flow rate ratio and the maximum suction flow rate ratio is a small value, and the suction holes within this range ( 6), the variation in the suction flow rate for each small suction hole (6) is small, and a stable large flow rate of air can be sucked into the sampling tube (a device that can suck and send air at the same time to the proximal end of the force). It is.
次に吸込用開口ｉｔｓ （５）から吸込まれる空気は、
サンプリング管（７）に吸引された煙等を基端部に向っ
て可及的速かに送るためのものであって、煙等のいわゆ
るキャリヤとして作用するものと考えられるので、吸込
用開口部（５）の開口面積が到達時間に及ぼす影響につ
いて、前記吸引小孔を設けていないサンプリング管を用
いて調べ、その結果を＠５図下部に示した。吸込用開口
部（５）の孔径が２ｆｉであって孔数な変えたものを実
線で、又、孔数は１個で孔径な変えたものを点線で夫々
示したとおり、孔数が多いもの又は孔径の大きいもの、
即ち、吸込用開口部（５）の開口面積が成る程度以上に
広いものは、到達時間は充分に短かくなって火災検出の
応答性に優れていることが判った。Next, the air sucked in from the suction opening its (5) is
The purpose of the suction opening is to send smoke, etc. sucked into the sampling tube (7) toward the proximal end as quickly as possible, and it is considered to act as a so-called carrier for smoke, etc. The effect of the opening area (5) on the arrival time was investigated using a sampling tube without the suction hole, and the results are shown in the lower part of Figure @5. The suction opening (5) has a 2fi pore diameter and the number of holes is changed as shown by the solid line, and the number of holes is 1 and the pore diameter is changed as shown in the dotted line. or one with a large pore size,
That is, it has been found that when the opening area of the suction opening (5) is larger than the above, the arrival time is sufficiently short and the response of fire detection is excellent.
第５図上部には孔径２ｍであって孔数を変えたものの吸
込流［ｉ（Ｌ ／ ｍｊ−ｔ）を実線で、又、孔数は１
個で孔径な変えたものを点線で夫々示したとおり、吸込
用開口部（５）の開口面積が成るていど広いもの：１吸
込流量も大きくなっていて、キャリヤとしての必要かつ
、充分な空気量を確保できるため。In the upper part of Figure 5, the suction flow [i (L / mj-t) is shown as a solid line with a hole diameter of 2 m and the number of holes changed, and the number of holes is 1.
As shown by the dotted lines, the opening area of the suction opening (5) is as wide as possible: 1. The suction flow rate is also large, and the necessary and sufficient air as a carrier is Because we can secure the quantity.
開口面積の広いものは到達時間が短かくなると云う上記
Ｉ！５図下部の傾向を裏付けるものである。As mentioned above, I! that the larger the opening area is, the shorter the arrival time! This confirms the trend shown at the bottom of Figure 5.
そして、上記の結果、成るていどの広さとして第５図に
縦の２点鎖線で示したように、吸込用開口部（５）の合
計面積がサンプリング管（７）の断面積４９０．９−の
約３０以上、即ち、相当直径では８ｆｉ以上のものが相
当することがわかった。As a result of the above, as shown by the vertical two-dot chain line in Fig. 5, the total area of the suction opening (5) is 490.9 - the cross-sectional area of the sampling tube (7). It was found that the equivalent diameter is about 30 or more, that is, the equivalent diameter is 8fi or more.
以上のことから、途中部に吸引小孔（６）を設けている
サンプリング管（７）の場合は、実用的に充分に短かい
到達時間を得るための必要な吸込用開口部（５）の合計
面積も、上記広さよりも更に小さいもので足りることが
考えられるので１次の実験を行った。即ち、直径２５龍
長さ４０−のサンプリング管中に径が２１１ｍの吸引小
孔（至）セ設け、更に、先端に直径５關の吸込用開口部
→を設けたところ、最先端の吸引小孔稀腕１ら吸引した
煙の到達時間は。From the above, in the case of a sampling tube (7) with a small suction hole (6) in the middle, the suction opening (5) is necessary to obtain a sufficiently short arrival time for practical purposes. Since it is conceivable that the total area may be even smaller than the above-mentioned size, the first experiment was conducted. In other words, a small suction hole with a diameter of 211 m was provided in a sampling tube with a diameter of 25 mm and a length of 40 mm, and a suction opening with a diameter of 5 mm was provided at the tip. What is the arrival time of the smoke inhaled from the hole 1?
末端に吸込用開口部悔が設けられていない場合に比べ、
約１／３である４０秒程度となった。このことから、先
端の吸込用開口部悔は吸引小孔（６）め開口面積より大
であれば充分な効果を有し、具体的には吸引小孔幡の数
個分の開口面積以上であれば十分な効果を有することが
わかった。Compared to the case where the suction opening is not provided at the end,
It took about 40 seconds, which is about 1/3. From this, the suction opening at the tip has a sufficient effect if it is larger than the opening area of the suction hole (6), and specifically, the opening area of the suction hole (6) should be larger than the opening area of several suction holes (6). It was found that it has a sufficient effect.
尚、火災検出部（８）は、煙検出型、熱検出型等、種々
のものを用いることができる。It should be noted that the fire detection section (8) can be of various types, such as a smoke detection type, a heat detection type, etc.
この発明に係るサンプリング管による火災検出装置は、
上述のように構成したものであって、サンプリング管（
力の先端部に設けである吸込用開口部（５）によって、
この先端部附近から吸込まれた煙等は速かに基端部へ送
られることになり、そして、サンプリング管（７）に設
けである複数の吸引小孔（６）の個数を、夫々の吸引流
量のうちの最小吸引流量が最大を示すときの吸引小孔（
６）の数を中心とする成る所定範囲内の個数に設定して
いるので、吸引状態の最も良くないところの最小吸引流
量を示している吸引小孔（６）からの吸引量が大きくな
り、したがって、基端部には煙等の検出のための充分な
流電が吸込まれることになって、これによってわづかな
濃度又は量の煙等もミスな（確実に検出できることにな
った。又、最小吸引流量が最大値を示すときの吸引小孔
（６）の数を中心とする所定範囲内の個数に吸引小孔（
６）の数を定め、この所定範囲として、最小吸引流量の
最大値−の約６５壬以上に相中する値を用いている実施
態様の発明では、吸引小孔（６）から吸引流量のバラツ
キが小さく、安定した大きい流電の煙等を含む空気をサ
ンプリング管（７）の基端部に向って送り込むことがで
きて。The fire detection device using a sampling tube according to the present invention includes:
It is configured as described above, and has a sampling tube (
By the suction opening (5) provided at the tip of the force,
Smoke, etc. inhaled from the vicinity of this tip will be quickly sent to the proximal end, and the number of small suction holes (6) provided in the sampling tube (7) can be adjusted to The suction hole when the minimum suction flow rate is the maximum among the flow rates (
Since the number is set within a predetermined range centered on the number 6), the amount of suction from the small suction hole (6), which indicates the minimum suction flow rate at the worst point in the suction condition, increases. Therefore, sufficient current for detecting smoke, etc. is sucked into the base end, and as a result, smoke, etc. of slight concentration or amount can be detected without error (reliably). In addition, the number of suction holes (6) within a predetermined range centered on the number of suction holes (6) when the minimum suction flow rate reaches its maximum value is
6), and uses a value that is equal to or greater than the maximum value of the minimum suction flow rate (-) as the predetermined range. It is possible to send air containing stable and large current smoke toward the proximal end of the sampling tube (7).
常に安定した状態の火災検出を行うことができるもので
ある。又、吸込用開口部（５）の開口面積をサンプリン
グ管（７）の吸引小孔の数１−分以上に定めた実施態様
の発明は、サンプリング管（７）の先端部附近に吸引さ
れた煙等を基端部に回って迅速に送るためのいわゆるキ
ャリヤとしての必要、かつ、充分な竜の空気を吸込用開
口部（５）から取込むことができるものであって、応答
性の良い火災検出が期待できるものである。It is possible to always perform stable fire detection. Further, in an embodiment of the invention in which the opening area of the suction opening (5) is set to be equal to or larger than the number of suction holes in the sampling tube (7), the suction opening (5) It is necessary as a so-called carrier to quickly send smoke, etc. around the base end, and it is capable of taking in sufficient air from the suction opening (5), and has good responsiveness. Fire detection can be expected.
図はこの発明の実施態様を示し、第１図は火災検出装置
の側面図、＠２図、＠３図、＠４図、第５図は実施態様
における特性図である。
符号説明
ｍ・・・・・・警戒地区
（５）・・・・・・吸込用開口部
（６）・・・・・・吸引小孔
（７）・・・・・・サンプリング管
（８）・・・・・・火災検出部
特 許 出 願 人 能美防災工業株式会社鴨１７１
−）Ｌ 数
第４図
一υし６１４Ｓよし散The figures show an embodiment of the present invention, and FIG. 1 is a side view of a fire detection device, and FIG. 2, FIG. 3, FIG. 4, and FIG. 5 are characteristic diagrams of the embodiment. Code explanation: m... Prevented area (5)... Suction opening (6)... Suction hole (7)... Sampling pipe (8) ...Fire detection unit patent application Nomi Disaster Prevention Industry Co., Ltd. Kamo171
-)L Number 4 Figure 1 υ and 614S Yoshisan
Claims (4)
成されたサンプリング管によって吸引し、吸引された空
気を基端部に設けている火災検出部にて火災を検出する
ように構成したサンプリング管による火災検出装置にお
いて、サンプリング管の先端部に煙等を可及的速かに基
端部へ送るのに必要な空気を吸込むための吸込用開口部
を設け、かつ、サンプリング管に長手方向に沿って複数
の吸引小孔を、複数の吸引小孔の夫々の吸引流量のうち
、最小を示す最小吸引流量が吸引小孔の数に応じて変化
するものであって、この最小吸引流量が最大を示すとき
の吸引小孔の数が存在し、吸引小孔のこの数を中心とす
る所定範囲内の個数に吸引小孔を設定して設けたことを
特徴とするサンプリング管による火災検出装置。(1) Air containing smoke, etc. in the restricted area is sucked through a sampling tube formed by a long tube, and the sucked air is configured to detect a fire with a fire detection section provided at the base end. In a fire detection device using a sampling tube, a suction opening is provided at the tip of the sampling tube to suck in the air necessary to send smoke, etc. to the base end as quickly as possible, and The minimum suction flow rate that indicates the minimum among the suction flow rates of each of the plurality of suction holes changes in accordance with the number of suction holes, and this minimum suction flow rate A fire caused by a sampling tube, characterized in that there is a number of suction holes when the flow rate is maximum, and the number of suction holes is set within a predetermined range centered on this number of suction holes. Detection device.
の最大値の約６５％以上であることを特徴とする特許請
求の範囲第１項記載のサンプリング管による火災検出装
置。(2) The fire detection device using a sampling tube according to claim 1, wherein the predetermined range of the number of small suction holes is about 65% or more of the maximum value of the minimum suction flow rate.
あることを特徴とする特許請求の範囲第１項又は第２項
記載のサンプリング管による火災検出装置。(3) A fire detection device using a sampling tube according to claim 1 or 2, wherein the plurality of small suction holes have substantially the same opening area.
引小孔の数個分以上であることを特徴とする特許請求の
範囲第１項記載のサンプリング管による火災検出装置。(4) The fire detection device using a sampling tube according to claim 1, wherein the opening area of the suction opening is equal to or larger than several suction holes of the sampling tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5003286A JPH0833962B2 (en) | 1986-03-07 | 1986-03-07 | Fire detector with sampling tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5003286A JPH0833962B2 (en) | 1986-03-07 | 1986-03-07 | Fire detector with sampling tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62206699A true JPS62206699A (en) | 1987-09-11 |
| JPH0833962B2 JPH0833962B2 (en) | 1996-03-29 |
Family
ID=12847654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5003286A Expired - Fee Related JPH0833962B2 (en) | 1986-03-07 | 1986-03-07 | Fire detector with sampling tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0833962B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05325063A (en) * | 1992-05-20 | 1993-12-10 | Nittan Co Ltd | Monitor circuit for smoke sensing suction device |
| JP2008134246A (en) * | 2006-11-14 | 2008-06-12 | Mocon Inc | Workspace specimen detection system and method using fan for moving sample from workspace to sensor |
| JP2014106678A (en) * | 2012-11-27 | 2014-06-09 | Nohmi Bosai Ltd | Mobile smoke detector and smoke generation position specification method using the same |
-
1986
- 1986-03-07 JP JP5003286A patent/JPH0833962B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05325063A (en) * | 1992-05-20 | 1993-12-10 | Nittan Co Ltd | Monitor circuit for smoke sensing suction device |
| JP2008134246A (en) * | 2006-11-14 | 2008-06-12 | Mocon Inc | Workspace specimen detection system and method using fan for moving sample from workspace to sensor |
| JP2014106678A (en) * | 2012-11-27 | 2014-06-09 | Nohmi Bosai Ltd | Mobile smoke detector and smoke generation position specification method using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0833962B2 (en) | 1996-03-29 |
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| LAPS | Cancellation because of no payment of annual fees |