JPH0815203A - Contact combustion type gas sensor - Google Patents

Contact combustion type gas sensor

Info

Publication number
JPH0815203A
JPH0815203A JP14721794A JP14721794A JPH0815203A JP H0815203 A JPH0815203 A JP H0815203A JP 14721794 A JP14721794 A JP 14721794A JP 14721794 A JP14721794 A JP 14721794A JP H0815203 A JPH0815203 A JP H0815203A
Authority
JP
Japan
Prior art keywords
cap
gas sensor
combustion type
wire mesh
type gas
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.)
Pending
Application number
JP14721794A
Other languages
Japanese (ja)
Inventor
Kimio Hatakeyama
喜美雄 畠山
Kazue Konuki
和重 小貫
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP14721794A priority Critical patent/JPH0815203A/en
Publication of JPH0815203A publication Critical patent/JPH0815203A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide a contact combustion type gas sensor whose resistance against wind speed is large and its dispersion is small, in which a cap for wind protection is fixed only by means of the shape of each of a metal net and a cap and its fitting method. CONSTITUTION:In a contact combustion type gas sensor provided with a gas sensor element 3 and a temperature compensation element in the inside enclosed by a base 1 and a metal net 5, while this metal net 5 is duplex and provided with a wind protection cap 6 between its duplex structure, a cap protrusion 6p protruding to the recessed side provided on the central spherical surface of the cap 6 is fitted in a recessed part 5h provided at the apex of an internal metal net 5a and pinched by two metal nets, thereby, the cap 6 is fixed. For fitting between the metal net 5 and the cap 6, the cap 6 may be fitted in the recessed part 5h of the metal net 5 in which the entire cap 6 may be fitted or plural claws are provided on the cap 6 and those may bite into the mesh of the metal net 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、ガス漏れ警報器等に
用いられる接触燃焼式ガスセンサに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalytic combustion type gas sensor used for a gas leak alarm or the like.

【0002】[0002]

【従来の技術】接触燃焼式ガスセンサは、例えば、都市
ガスやプロパンガスなどのガス漏れを検知して警報を発
するガス漏れ警報器にひろく用いられている。接触燃焼
式ガスセンサは、ガスとの接触により抵抗が変化するガ
スセンサ素子と、ガスと接触していない場合のガスセン
サ素子と同じ温度特性の抵抗を有し、形状もほぼ同じで
ある温度補償素子とを内蔵するデバイスである。
2. Description of the Related Art Catalytic combustion type gas sensors are widely used, for example, in gas leak alarms for detecting gas leaks of city gas, propane gas, etc. and issuing an alarm. The catalytic combustion gas sensor includes a gas sensor element whose resistance changes due to contact with gas and a temperature compensation element which has the same temperature characteristic resistance as the gas sensor element when not in contact with gas and has almost the same shape. It is a built-in device.

【0003】図4はガス漏れ警報器の回路図であり、ガ
スセンサ素子3と温度補償素子4とはガス検知ブリッジ
回路の2辺を構成している。固定抵抗7、8の抵抗値は
回路の電圧印加端子9間に一定電圧が印加されていると
き、検知可能ガスがガスセンサ素子3に接触していない
場合には、信号出力端子10間に電位差が発生しないよ
うに定められている。検知可能ガスが接触燃焼式ガスセ
ンサすなわちガスセンサ素子3に接触すると、その抵抗
が増加してブリッジ回路のバランスはくずれて、信号端
子10間には電位差が発生する。この電位差がガス検知
信号である。
FIG. 4 is a circuit diagram of a gas leak alarm device. The gas sensor element 3 and the temperature compensating element 4 form two sides of a gas detection bridge circuit. When a constant voltage is applied between the voltage application terminals 9 of the circuit and the detectable gas is not in contact with the gas sensor element 3, the fixed resistors 7 and 8 have a potential difference between the signal output terminals 10. It is set not to occur. When the detectable gas comes into contact with the contact combustion gas sensor, that is, the gas sensor element 3, the resistance increases, the balance of the bridge circuit is lost, and a potential difference occurs between the signal terminals 10. This potential difference is the gas detection signal.

【0004】従来例の接触燃焼式ガスセンサの断面図を
図5に示す。絶縁材のベース1には、金属製の4本のス
テム2(図では図面手前の2本のステム2に隠れた後方
の2本のステムは見えない)がベース1に垂直に貫通し
て固定されている。4本のステム2は長方形の頂点をな
すように配置されている。ガスセンサ素子3はその端子
部を隣接する2本のステムにまたがって溶接されてい
る。図5ではガスセンサ素子3に重なるので図示してい
ない温度補償素子はその端子部を他の隣接する2本のス
テムにまたがって溶接されている。ステム2とガスセン
サ素子3と温度補償素子とは、ベース1の周縁内側に接
着されている細かい目の金網5によってカバーされてい
る。金網5は、爆発限界濃度以上のガスが接燃焼式ガス
センサに到達した場合でも,高温のガスセンサ素子3が
発火源にならないために用いられていて二重となってい
る。
A cross-sectional view of a conventional catalytic combustion type gas sensor is shown in FIG. On the insulating base 1, four metal stems 2 (in the figure, the two rear stems hidden by the two stems 2 in the front of the drawing cannot be seen) are vertically penetrated and fixed to the base 1. Has been done. The four stems 2 are arranged so as to form a rectangular vertex. The gas sensor element 3 has its terminal portion welded over two adjacent stems. In FIG. 5, the temperature compensating element (not shown) overlaps with the gas sensor element 3, so that the terminal portion thereof is welded across the other two adjacent stems. The stem 2, the gas sensor element 3, and the temperature compensating element are covered by a fine mesh 5 attached to the inside of the peripheral edge of the base 1. The wire net 5 is doubled because the high temperature gas sensor element 3 does not serve as an ignition source even when a gas having a concentration higher than the explosion limit concentration reaches the contact combustion type gas sensor.

【0005】金網5を通ってきた検知対象ガスがガスセ
ンサ素子3に接触すると、ガスセンサ素子3に担持され
た触媒の作用によって検知対象ガスは燃焼し、ガスセン
サ素子3の温度は定常状態より上昇しその抵抗値は温度
補償素子のそれより高くなる。接触燃焼式ガスセンサは
上記の様に金網5を通って来る大気に晒されているの
で、あまりに強い風が当たるとガスセンサ素子3の温度
が低下し、接触燃焼が充分に行われなくなり、ガス検知
感度の過度の低下に至ることがある。これを避けるた
め、金網の頂点には風防用のキャップ6が取り付けられ
ている。キャップ6は金網の頂点付近の形状に沿うよう
に、ほぼ球面状の略小円板であり、内側金網5aの頂点
にスポット溶接(溶接部6w)されている。外側金網5
bはキャップ6と内側金網5aとを被覆している。
When the gas to be detected which has passed through the metal net 5 comes into contact with the gas sensor element 3, the gas to be detected is burned by the action of the catalyst carried by the gas sensor element 3, and the temperature of the gas sensor element 3 rises from a steady state. The resistance value is higher than that of the temperature compensation element. Since the catalytic combustion type gas sensor is exposed to the atmosphere passing through the wire net 5 as described above, the temperature of the gas sensor element 3 will be lowered if an excessively strong wind strikes the catalytic combustion, and the catalytic combustion will not be sufficiently carried out. May lead to excessive reduction of. In order to avoid this, a windshield cap 6 is attached to the top of the wire mesh. The cap 6 is a substantially spherical disk having a substantially spherical shape so as to follow the shape near the apex of the wire mesh, and is spot welded (welded portion 6w) to the apex of the inner wire mesh 5a. Outer wire mesh 5
b covers the cap 6 and the inner wire mesh 5a.

【0006】接触燃焼式ガスセンサ内部ではガスセンサ
素子3と温度補償素子とはベースの回転対称軸に対称
に、近距離に配置されている。キャップ6の中心がこの
軸からはずれて取り付けられると、風が2つの素子に一
様に当たらず、2つの素子の温度に違いが生じ、見かけ
上ガス検知したかのようになり、著しい場合には、誤報
を発する。この時の風速を耐風速と呼ぶ。接触燃焼式ガ
スセンサとしては耐風速は大きいほうが望ましい。
Inside the catalytic combustion type gas sensor, the gas sensor element 3 and the temperature compensating element are arranged at a short distance symmetrically with respect to the rotational symmetry axis of the base. When the center of the cap 6 is attached off the axis, the wind does not hit the two elements uniformly, and the temperature difference between the two elements occurs, which makes it seem as if gas was detected. Gives a false alarm. The wind speed at this time is called the wind speed. As for the catalytic combustion type gas sensor, it is desirable that the wind speed is high.

【0007】耐風速のキャップ位置ずれ依存性を示す線
図を図6に示す。耐風速はキャップの中心がベースの回
転対称軸からずれるに従って小さくなることが判る。実
用上、耐風速は4m/s以上であれば良く、キャップ位
置の分布は±1mm以内に抑える必要がある。この従来
例の接触燃焼式ガスセンサの組立工程を次に記す。すで
に一体化されているベース1のステム2に、ガスセンサ
素子3と温度補償素子とが溶接された後、内側金網5a
を被せベース1に接着する。内側金網5aの頂点にキャ
ップ6を置き内側金網5aの頂点にスポット溶接(溶接
部6w)をし、外側金網5bを被せベース1に接着す
る。
FIG. 6 shows a diagram showing the dependence of the wind speed resistance on the displacement of the cap. It can be seen that the wind speed decreases as the center of the cap deviates from the axis of rotational symmetry of the base. In practice, the wind speed is required to be 4 m / s or more, and the cap position distribution needs to be suppressed within ± 1 mm. The assembling process of this conventional catalytic combustion type gas sensor will be described below. After the gas sensor element 3 and the temperature compensating element are welded to the stem 2 of the base 1 already integrated, the inner wire mesh 5a
And adhere to the base 1. The cap 6 is placed on the apex of the inner wire net 5a, spot welding (welding portion 6w) is performed on the apex of the inner wire net 5a, and the outer wire net 5b is covered and bonded to the base 1.

【0008】[0008]

【発明が解決しようとする課題】しかし、上記組立工程
から明らかなように、内側金網の頂点に置かれたキャッ
プは自由に動きうる状態にあり、内側金網の頂点にキャ
ップを置いてから、内側金網の頂点にスポット溶接する
までの間にキャップが1mm以上移動し、そのままスポ
ット溶接され、耐風速が小さいものが製造されることが
起こるという問題があった。
However, as is apparent from the above assembling process, the cap placed on the apex of the inner wire mesh is in a state of being able to move freely. There was a problem that the cap moved 1 mm or more before spot welding to the top of the wire mesh, spot welding was performed as it was, and a product having a low wind speed was produced.

【0009】この発明の目的は、組立工程中にキャップ
の位置がずれることがなく、キャップの位置を精度良く
固定することができ、耐風速が大きく、そのばらつきの
小さい接触燃焼式ガスセンサを提供することにある。
An object of the present invention is to provide a contact combustion type gas sensor in which the position of the cap does not shift during the assembly process, the position of the cap can be accurately fixed, the wind speed is high, and the variation is small. Especially.

【0010】[0010]

【課題を解決するための手段】上記の目的を達成するた
めに、この発明は、ベースと二重の金網とで囲まれた内
部にガスセンサ素子と温度補償素子とを有し、この二重
の金網の間に風防用のキャップを有する接触燃焼式ガス
センサにおいて、前記キャップまたはこの金網と当接す
る金網の少なくとも一方に該キャップを金網に固定する
嵌合部を設け、前記キャップを嵌合部により金網に固定
して、2つの金網で挟持することによって、キャップを
固定するものとする。
In order to achieve the above-mentioned object, the present invention has a gas sensor element and a temperature compensating element inside a base and a double wire mesh. In a contact combustion type gas sensor having a windshield cap between wire meshes, a fitting portion for fixing the cap to the wire mesh is provided on at least one of the cap and the wire mesh contacting with the wire mesh, and the cap is fitted by the fitting portion. Then, the cap is fixed by fixing the cap to the wire and sandwiching it with two wire nets.

【0011】前記キャップを嵌合部により金網に固定す
る嵌合部は、請求項2に記載のように、キャップに設け
た二重の金網の少なくとも一方に突出する突起および、
金網に設けた該突起が嵌め込まれる凹部からなり、これ
らを互いに嵌め合わせ、2つの金網で挟持することによ
ってキャップを固定するのがよい。また、前記嵌合部
は、請求項3に記載のように金網に設けられたキャップ
全体が嵌まる凹部からなり、そこにキャップを嵌め合わ
せ、さらに2つの金網で挟持することによって、キャッ
プを固定するのがよい。
The fitting portion for fixing the cap to the wire netting by the fitting portion has a projection protruding to at least one of the double wire netting provided on the cap, as set forth in claim 2.
It is preferable that the projection is provided in the wire netting, and the projection is fitted in the recessed portion, and the projections are fitted to each other and sandwiched by two wire netting to fix the cap. Further, the fitting portion is composed of a concave portion into which the entire cap provided on the wire net is fitted as described in claim 3, and the cap is fixed by fitting the cap into the concave portion and further sandwiching it with two wire nets. Good to do.

【0012】さらに、前記嵌合部は、請求項4に記載の
ようにキャップに設けられた複数の爪からなり、それら
を金網の編み目に食い込ませ、さらに2つの金網で挟持
することによってキャップを固定するのがよい。
Further, the fitting portion is composed of a plurality of claws provided on the cap as described in claim 4, and the claws are engaged with the claws of the wire mesh, and further sandwiched by two wire meshes to hold the cap. It is better to fix it.

【0013】[0013]

【作用】請求項1に記載した発明においては、金網とキ
ャップの少なくとも一方に設けた嵌合部を嵌め合わせる
ので、これらを嵌め合わせる工程の後では、キャップは
金網に対する滑りを抑えられている。さらにベースに接
着された2つの金網で挟持されるので、キャップは金網
に垂直方向への移動も抑えられている。
In the invention described in claim 1, since the fitting portions provided on at least one of the wire netting and the cap are fitted together, the cap is prevented from slipping on the wire netting after the fitting process. Further, since it is sandwiched by the two wire nets adhered to the base, movement of the cap in the direction perpendicular to the wire nets is also suppressed.

【0014】前記金網とキャップとの嵌合部は、請求項
2に記載したものでは、金網とキャップの各々の少なく
とも一部に設けた凸凹部を嵌め合わせ、または請求項3
に記載したものでは金網に設けられたキャップ全体が嵌
まる凹部にキャップ全体を嵌め合わせ、あるいは、請求
項4に記載したものでは、キャップに設けられた複数の
爪を金網の編み目に食い込ませるので、キャップは外側
金網が被せられる工程中に移動することは抑えられてい
る。
According to a second aspect of the present invention, the fitting portion between the wire mesh and the cap is formed by fitting projections and depressions provided on at least a part of each of the wire mesh and the cap.
In the one described in (4), the entire cap is fitted in the recessed part to which the entire cap provided in the wire mesh fits, or in the one described in claim 4, because the plurality of claws provided in the cap bite into the mesh of the wire mesh. The cap is prevented from moving during the process of covering the outer wire mesh.

【0015】いずれの場合においても、外側金網が被せ
られ、接着された後では、キャップは金網間に軽く挟ま
れているだけであっても、キャップは金網に垂直方向へ
の移動を抑えられており、嵌め合わせや爪の食い込みが
外れることはなく、かなりの衝撃にも耐えられるだけの
強さに固定されることが可能となる。
In any case, after the outer wire mesh is covered and adhered, even if the cap is only lightly sandwiched between the wire meshes, the cap is prevented from moving in the direction perpendicular to the wire mesh. Therefore, the fitting and the biting of the claws do not come off, and it is possible to fix the product to the strength that can withstand a considerable impact.

【0016】[0016]

【実施例】【Example】

実施例1 本発明の一実施例の接触燃焼式ガスセンサの断面図を図
1に示す。図1において、図5に示す従来例と相違する
点は、キャップ6の中央球面の凹側へ向けて小さい突起
6pを設け、そして組立工程中の接触燃焼式ガスセンサ
の向きは金網の頂点が上向きなので、内側金網5aの頂
点に、凹部5hを設けた点である。凹部5hはキャップ
の突起6pが嵌まる大きさとした。
Example 1 FIG. 1 shows a sectional view of a catalytic combustion type gas sensor according to an example of the present invention. 1 is different from the conventional example shown in FIG. 5 in that a small projection 6p is provided toward the concave side of the central spherical surface of the cap 6, and the contact combustion type gas sensor is oriented upward at the top of the wire mesh during the assembly process. Therefore, the concave portion 5h is provided at the apex of the inner wire mesh 5a. The recess 5h is sized to fit the protrusion 6p of the cap.

【0017】内側金網5aをベース1に接着した後、そ
の上にキャップの突起6pを内側金網5aの凹部5hに
嵌めてから、外側金網5bを被せベース1に接着し、接
触燃焼式ガスセンサを完成させた。キャップ位置精度を
調べたところ、その位置ずれは±0.7mm以内に収ま
っていた。これらの接触燃焼式ガスセンサを、落下衝撃
試験により、金網が直接ぶつからないような向きにし
て、50cmの高さからコンクリートの床に落とした
後、キャップ位置を測定したところ殆ど変化はみられな
かった。 実施例2 本発明の他の実施例の接触燃焼式ガスセンサの断面図を
図2に示す。図2に示す従来例が図1に示す実施例1と
異なる点は、組立工程中の接触燃焼式ガスセンサの向き
は金網の頂点が上向きなので、内側金網5aの頂点に、
キャップ6の全体がキャップの厚さの半ば迄嵌まる凹部
5Hを設けた点である。
After the inner wire mesh 5a is adhered to the base 1, the projection 6p of the cap is fitted on the recess 5h of the inner wire mesh 5a, and then the outer wire mesh 5b is covered and adhered to the base 1 to complete the contact combustion type gas sensor. Let When the cap position accuracy was examined, the position shift was within ± 0.7 mm. These contact combustion type gas sensors were dropped from a height of 50 cm on a concrete floor by a drop impact test so that the wire mesh did not directly hit them, and then the cap position was measured. As a result, almost no change was observed. . Embodiment 2 FIG. 2 shows a sectional view of a catalytic combustion type gas sensor according to another embodiment of the present invention. The conventional example shown in FIG. 2 is different from the first example shown in FIG. 1 in that the contact combustion type gas sensor in the assembling process has an apex of the wire mesh facing upward,
The point is that the entire cap 6 is provided with a recess 5H that fits up to the middle of the thickness of the cap.

【0018】内側金網5aを接着した後、その上にキャ
ップ6を凹部5Hに嵌めてから、外側金網5bを被せベ
ース1に接着し、接触燃焼式ガスセンサを完成させた。
キャップ位置精度を調べたところ、その位置ずれは±
0.7mm以内に収まっていた。これらの接触燃焼式ガ
スセンサを、実施例1と同様の試験をしたところ、キャ
ップ位置には殆ど変化はみられなかった。 実施例3 本発明の別の実施例の接触燃焼式ガスセンサの断面図を
図3に示す。実施例1の様な突起を設けてないキャップ
6の縁に等間隔に3個のキャップ爪6tを設けた。キャ
ップ爪6tは内側金網5aの編み目に入り込む程度の鋭
い先端の略三角形とした。キャップ6を内側金網5aの
頂点に置き、軽く押しつけただけでキャップ爪6tは内
側金網5aの編み目に食い込み、外側金網5bを被せる
工程中に動くことはなかった。キャップ6の固定をさら
に強固にするため、外側金網5bを被せたとき内側金網
5aがキャップ爪6tに押されて0.2mm程度凹むよ
うにした。
After adhering the inner wire mesh 5a, the cap 6 was fitted in the recess 5H, and then the outer wire mesh 5b was covered and adhered to the base 1 to complete the catalytic combustion type gas sensor.
When the cap position accuracy was examined, the position deviation was ±
It was within 0.7 mm. When these catalytic combustion type gas sensors were tested in the same manner as in Example 1, almost no change was observed in the cap position. Example 3 FIG. 3 shows a sectional view of a catalytic combustion type gas sensor according to another example of the present invention. Three cap claws 6t are provided at equal intervals on the edge of the cap 6 having no protrusion as in the first embodiment. The cap claw 6t has a substantially triangular shape with a sharp tip that fits into the stitches of the inner wire mesh 5a. Only by placing the cap 6 on the apex of the inner wire mesh 5a and pressing it lightly, the cap claws 6t bite into the stitches of the inner wire mesh 5a and did not move during the step of covering the outer wire mesh 5b. In order to fix the cap 6 more firmly, the inner wire mesh 5a is pushed by the cap claw 6t and is recessed by about 0.2 mm when the outer wire mesh 5b is covered.

【0019】内側金網5aを接着した後、キャップ6を
所定の位置に置き、外側金網5bを被せ接着し、接触燃
焼式ガスセンサを完成させた。キャップ位置精度を調べ
たところ、±0.8mm以内に収まっていた。これらの
接触燃焼式ガスセンサを、実施例1と同様の試験をした
ところ、キャップ位置には殆ど変化はみられなかった。 実施例4 前記の実施例では、組立工程はガスセンサ素子をベース
の上側としていた。しかし、上下逆向きの組立工程であ
ってもこの発明は適用できる。
After adhering the inner wire net 5a, the cap 6 was placed at a predetermined position, and the outer wire net 5b was covered and adhered to complete the contact combustion type gas sensor. When the cap position accuracy was examined, it was within ± 0.8 mm. When these catalytic combustion type gas sensors were tested in the same manner as in Example 1, almost no change was observed in the cap position. Example 4 In the above example, the gas sensor element was on the upper side of the base in the assembly process. However, the present invention can be applied even when the assembly process is upside down.

【0020】キャップの中央に球面の凸部へ向けて小さ
い突起を設け、外側金網の頂点にはキャップの突起が嵌
まるだけの大きさの凸部を外側に向けて設けた。外側金
網の頂点を下側として支え、キャップの突起を下側とし
て外側金網の中に置き互いに嵌め合わせた。次いで、す
でに素子が溶接され、内側金網が接着されているベース
を下向きとし外側金網の中に入れ、外側金網とベースと
を接着した。
A small protrusion is provided at the center of the cap toward the convex portion of the spherical surface, and a convex portion having a size large enough to fit the protrusion of the cap is provided at the apex of the outer wire mesh. The apex of the outer wire mesh was supported as the lower side, and the protrusion of the cap was placed as the lower side in the outer wire mesh and fitted together. Then, the base to which the elements were already welded and the inner wire mesh was adhered was faced downward and placed in the outer wire mesh to bond the outer wire mesh and the base.

【0021】この様にして 実施例1と全く同じ接触燃
焼式ガスセンサを製造できた。
In this way, the exact same catalytic combustion gas sensor as in Example 1 could be manufactured.

【0022】[0022]

【発明の効果】金網とキャップの少なくとも一部に互い
に凹凸を設け、それらを嵌め合わせてから、あるいは、
キャップに複数の爪を設けそれらを金網の編み目に食い
込ませてから、キャップが半固定状態で第2の金網を被
せたので、組立工程中にキャップ位置がずれることは生
じなくなった。従って、耐風速は大きく、そのばらつき
は減少し、製造歩留りが向上した。また、キャップの金
網への溶接をおこなわなくても製造後キャップ位置がず
れないので、溶接工程を省略でき、工数の削減ができ
た。
EFFECTS OF THE INVENTION At least a part of the wire mesh and the cap are provided with concavities and convexities and they are fitted together, or
Since the cap is provided with a plurality of claws and the claws are engaged with the mesh of the wire mesh, and the cap is covered with the second wire mesh in a semi-fixed state, the cap position does not shift during the assembly process. Therefore, the wind speed was high, the variation was reduced, and the manufacturing yield was improved. Further, since the cap position does not shift after manufacturing even if the cap is not welded to the wire mesh, the welding process can be omitted and the number of steps can be reduced.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例の接触燃焼式ガスセンサの
断面図
FIG. 1 is a sectional view of a catalytic combustion type gas sensor according to an embodiment of the present invention.

【図2】この発明の他の実施例の接触燃焼式ガスセンサ
の断面図
FIG. 2 is a sectional view of a catalytic combustion type gas sensor according to another embodiment of the present invention.

【図3】この発明の別の実施例の接触燃焼式ガスセンサ
の断面図
FIG. 3 is a sectional view of a catalytic combustion type gas sensor according to another embodiment of the present invention.

【図4】ガス検知ブリッジ回路図[Figure 4] Gas detection bridge circuit diagram

【図5】従来例の接触燃焼式ガスセンサの断面図FIG. 5 is a sectional view of a conventional catalytic combustion gas sensor.

【図6】耐風速のキャップ位置ずれ依存性を示す線図FIG. 6 is a diagram showing the dependence of wind speed resistance on cap position deviation.

【符号の説明】[Explanation of symbols]

1 ベース 2 ステム 3 ガスセンサ素子 5 金網 5a 内側金網 5b 外側金網 5h 内側金網凹部 5H 内側金網凹部 6 キャップ 6p キャップ突起 6t キャップ爪 6w 溶接部 7 抵抗 8 抵抗 9 電圧印加端子 10 信号出力端子 1 base 2 stem 3 gas sensor element 5 wire mesh 5a inner wire mesh 5b outer wire mesh 5h inner wire mesh recess 5H inner wire mesh recess 6 cap 6p cap projection 6t cap claw 6w weld 7 resistance 8 resistance 9 voltage application terminal 10 signal output terminal 10

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】ベースと二重の金網とで囲まれた内部にガ
スセンサ素子と補償素子とを有し、この二重の金網の間
に風防用のキャップを有する接触燃焼式ガスセンサにお
いて、前記キャップまたはこの金網と当接する金網の少
なくとも一方に該キャップを金網に固定する嵌合部を設
け、前記キャップを嵌合部により金網に固定したことを
特徴とする接触燃焼式ガスセンサ。
1. A contact combustion type gas sensor having a gas sensor element and a compensating element inside a base and a double wire mesh, and a windshield cap between the double wire meshes. Alternatively, a contact combustion type gas sensor characterized in that a fitting portion for fixing the cap to the wire net is provided on at least one of the wire nets that come into contact with the wire net, and the cap is fixed to the wire net by the fitting portion.
【請求項2】請求項1に記載の接触燃焼式ガスセンサに
おいて、前記キャップは、二重の金網の少なくとも一方
に突出する突起を有し、金網は該突起部が嵌め込まれる
凹部を有することを特徴とする接触燃焼式ガスセンサ。
2. The catalytic combustion type gas sensor according to claim 1, wherein the cap has a protrusion protruding from at least one of the double wire mesh, and the metal mesh has a recess into which the protrusion is fitted. Contact combustion gas sensor.
【請求項3】請求項1に記載の接触燃焼式ガスセンサに
おいて、前記金網は、キャップ全体が嵌め込まれる凹部
であることを特徴とする接触燃焼式ガスセンサ。
3. The catalytic combustion type gas sensor according to claim 1, wherein the wire mesh is a recess into which the entire cap is fitted.
【請求項4】請求項1に記載の接触燃焼式ガスセンサに
おいて、前記キャップは、金網の編み目に食い込まれる
複数の爪を有することを特徴とする接触燃焼式ガスセン
サ。
4. The contact combustion type gas sensor according to claim 1, wherein the cap has a plurality of claws that are bite into the mesh of the wire mesh.
JP14721794A 1994-06-29 1994-06-29 Contact combustion type gas sensor Pending JPH0815203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14721794A JPH0815203A (en) 1994-06-29 1994-06-29 Contact combustion type gas sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14721794A JPH0815203A (en) 1994-06-29 1994-06-29 Contact combustion type gas sensor

Publications (1)

Publication Number Publication Date
JPH0815203A true JPH0815203A (en) 1996-01-19

Family

ID=15425225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14721794A Pending JPH0815203A (en) 1994-06-29 1994-06-29 Contact combustion type gas sensor

Country Status (1)

Country Link
JP (1) JPH0815203A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007232657A (en) * 2006-03-03 2007-09-13 Riken Keiki Co Ltd Combustible gas detection device
US11162914B2 (en) * 2016-06-30 2021-11-02 Kitz Corporation Pressure-resistance inspection apparatus for valves and its inspection method, and hydrogen gas detection unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007232657A (en) * 2006-03-03 2007-09-13 Riken Keiki Co Ltd Combustible gas detection device
US11162914B2 (en) * 2016-06-30 2021-11-02 Kitz Corporation Pressure-resistance inspection apparatus for valves and its inspection method, and hydrogen gas detection unit

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