JP6512701B2 - Contact combustion gas sensor - Google Patents
Contact combustion gas sensor Download PDFInfo
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- JP6512701B2 JP6512701B2 JP2015096967A JP2015096967A JP6512701B2 JP 6512701 B2 JP6512701 B2 JP 6512701B2 JP 2015096967 A JP2015096967 A JP 2015096967A JP 2015096967 A JP2015096967 A JP 2015096967A JP 6512701 B2 JP6512701 B2 JP 6512701B2
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- Japan
- Prior art keywords
- stay
- gas sensor
- contact combustion
- contact
- combustion type
- 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.)
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- 239000000567 combustion gas Substances 0.000 title description 2
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000007084 catalytic combustion reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
本発明は、接触燃焼式ガスセンサを構成するヒータ線とステーなどの支持部材との接続部の結露防止構造に関する。 BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a dew condensation preventing structure of a connection portion between a heater wire forming a contact combustion type gas sensor and a support member such as a stay.
接触燃焼式ガスセンサは、白金などの温度抵抗係数の大きな線材をコイル状に整形したヒータに、燃焼ガスが接触すると燃焼を促す触媒を含む材料を密着するように囲繞して感応部を形成し、ヒータの両端をステーに導電的に固定して構成されている。 The catalytic combustion type gas sensor forms a sensitive portion by enclosing a material including a catalyst which promotes combustion when combustion gas contacts a heater formed by shaping a wire material having a large temperature resistance coefficient such as platinum into a coil shape, Both ends of the heater are conductively fixed to the stay.
感応部に可燃性ガスが接触すると、燃焼により生じた水蒸気が比較的温度の低いステー部で結露し、ヒータとの接続部近傍の結露がヒータや感応部に流れ込み、故障の原因となる。
このため、たとえば特許文献１に見られるように発熱体を設けることも提案されている。しかしながら発熱体を付設する関係上、センサー全体の構造が複雑化するなどの不都合がある。
When the combustible gas comes in contact with the sensitive portion, the water vapor generated by the combustion condenses in the relatively low temperature stay portion, and the dew condensation in the vicinity of the connection portion with the heater flows into the heater or sensitive portion, causing a failure.
For this reason, it has also been proposed to provide a heating element as seen in
本発明はこのような問題に鑑みてなされたものであって、その目的とするところは構造の複雑化を招くことなく、ステーへの結露を防止した接触燃焼式ガスセンサを提供することである。 The present invention has been made in view of such problems, and an object of the present invention is to provide a contact combustion type gas sensor in which dew condensation on a stay is prevented without complicating the structure.
このような問題を解消するために本発明の接触燃焼式ガスセンサは、ジュール熱を発生するヒータに、ガスに接触して発熱する感応部が形成され、前記ヒータの両端部をステーに導電的に固定した接触燃焼式ガスセンサにおいて、前記ステーが板材により構成され、ステーの前記感応部側に中心線に対称となる凹部が形成され、前記凹部近傍に硬化性高分子剤の塊が形成されている。 In order to solve such problems, in the contact combustion type gas sensor of the present invention, a sensitive portion which generates heat in contact with gas is formed in a heater generating Joule heat, and both ends of the heater are conductively connected to a stay in fixed catalytic combustion type gas sensor, the stay is constituted by a plate material, the concave portion which are symmetrical to the center line is formed on the sensitive portion of the stay, that have a mass of curable polymeric agent is formed in the recess near .
ステーの凹部に高分子剤が集中的に硬化し、金属よりも熱伝導度が低くなり、接続部での結露を防止して断線などの不都合を防止できる。 The polymer agent is intensively cured in the recess of the stay, the thermal conductivity becomes lower than that of metal, and the dew condensation at the connection portion can be prevented to prevent the problem such as the disconnection.
図は、本発明の一実施例をステー １，１と接触燃焼式ガス検出素子２との近傍でもって示すものであって、素子２は、白金などの温度抵抗係数の大きな線材をコイル状に整形したヒータに、ガスに接触して発熱する材料で密着するように囲繞して感応部３を形成し、ヒータの両端子４ａ、４ａがステー１，１に電着などで導電的に固定されている。
The figure shows an embodiment of the present invention in the vicinity of the
ステー１は、図２に示したように板状の金属板を長方形に切り出し、その先端を幅方向の中心線Ｃに対称となるようにこの実施例では略半円形状の凹部１ａ、もしくは三角形状の凹部１ｂ（同図ｂ）が形成されている。
凹部１ａは、硬化性エポキシ樹脂に対して表面張力を発現させる程度のサイズ、この実施例では半径1ｍｍ程度に形成されている。
In the
The
液状の硬化性高分子剤、たとえば熱硬化性エポキシ樹脂をステー１の凹部１ａ、１ｂの近傍に滴下すると、凹部１ａ、１ｂでの表面張力により凹部１ａ、１ｂに移動し、板状のステー１の表面や裏面ばかりでなく凹部１ａ、１ｂの断面にまで確実に拡散し、ステー１の表面、裏面、断面を包み込むように硬化して塊５となる。
When a liquid curable polymer agent, for example, a thermosetting epoxy resin, is dropped in the vicinity of the
この塊５は、金属よりも熱伝導率が大幅に低い高分子剤で構成されているため、周囲の水蒸気が金属のステー１の先端部で結露するのを確実に防止することができる。
The
１，１ ステー １ａ、１ｂ 凹部 ２ 接触燃焼式ガス検出素子 ５ 硬化性高分子剤の塊
1, 1
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015096967A JP6512701B2 (en) | 2015-05-12 | 2015-05-12 | Contact combustion gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015096967A JP6512701B2 (en) | 2015-05-12 | 2015-05-12 | Contact combustion gas sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2016212004A JP2016212004A (en) | 2016-12-15 |
| JP6512701B2 true JP6512701B2 (en) | 2019-05-15 |
Family
ID=57551636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015096967A Active JP6512701B2 (en) | 2015-05-12 | 2015-05-12 | Contact combustion gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6512701B2 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07209096A (en) * | 1994-01-13 | 1995-08-11 | Murata Mfg Co Ltd | Platinum temperature sensor and manufacture thereof |
| JP2004093474A (en) * | 2002-09-03 | 2004-03-25 | Ngk Spark Plug Co Ltd | Micro sensor made of silicon |
| JP4021827B2 (en) * | 2003-09-19 | 2007-12-12 | 本田技研工業株式会社 | Gas sensor |
| JP4833717B2 (en) * | 2006-03-31 | 2011-12-07 | シチズンホールディングス株式会社 | Contact combustion type gas sensor and its sensing element and compensating element |
| JP4919516B2 (en) * | 2008-01-15 | 2012-04-18 | 理研計器株式会社 | Manufacturing method of gas detector |
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2015
- 2015-05-12 JP JP2015096967A patent/JP6512701B2/en active Active
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| Publication number | Publication date |
|---|---|
| JP2016212004A (en) | 2016-12-15 |
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