JPH03111751A - Kerosene detecting element - Google Patents
Kerosene detecting elementInfo
- Publication number
- JPH03111751A JPH03111751A JP25026489A JP25026489A JPH03111751A JP H03111751 A JPH03111751 A JP H03111751A JP 25026489 A JP25026489 A JP 25026489A JP 25026489 A JP25026489 A JP 25026489A JP H03111751 A JPH03111751 A JP H03111751A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- sensitive film
- kerosene
- electrodes
- substrate
- 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
Links
- 239000003350 kerosene Substances 0.000 title claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000008206 lipophilic material Substances 0.000 claims abstract description 9
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 9
- 239000004945 silicone rubber Substances 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 9
- 239000006230 acetylene black Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 239000011810 insulating material Substances 0.000 abstract description 2
- 229910052573 porcelain Inorganic materials 0.000 abstract description 2
- 238000007639 printing Methods 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 abstract 1
- 230000002522 swelling effect Effects 0.000 abstract 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- HEJFWWFWBQGZGQ-UHFFFAOYSA-N azuleno(2,1,8-ija)azulene Chemical compound C1=CC=C2C=C(C=CC=CC3=C4)C3=C2C4=C1 HEJFWWFWBQGZGQ-UHFFFAOYSA-N 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
この発明は灯油を燃料とする石油ストーブ、石油ファン
ヒータのような石油暖房機や石油給湯機などに使用され
、燃料タンクやカートリッジタンクからの燃料漏れを検
知するのに適した灯油検知素子に関する。[Detailed description of the invention] (a) Industrial application field This invention is used in kerosene stoves, kerosene heaters such as kerosene fan heaters, kerosene water heaters, etc. The present invention relates to a kerosene detection element suitable for detecting fuel leakage.
（ロ）従来の技術
従来、石油燃焼装置では、例えば、実開昭６３−１１６
７４７号公報に開示されているように、燃焼装置の低い
蔀分に灯油検知素子を設置し、装置の一部の故障や取扱
上の不注意によって灯油漏れが生じた場合、灯油検知素
子からの信号でスピーカー等の報知器を作動きせるもの
が提案されている。(b) Conventional technology Conventionally, in oil combustion equipment, for example,
As disclosed in Publication No. 747, a kerosene detection element is installed in a low part of the combustion equipment, and if kerosene leaks due to a failure of a part of the equipment or carelessness in handling, the kerosene detection element A system has been proposed in which a signal activates an alarm device such as a speaker.
（ハ）発明が解決しようとする課題
上述した石油燃焼装置の灯油検知素子は静電容量の変化
を検出する一対の電極よりなるものであるから、素子が
大型となって大きな取付はスペースを必要とするばかり
でなく、周辺回路の構成が複雑になり、さらには、微量
の灯油漏れを検出することが難しい欠点があった。また
、複数の自己発熱型サーミスタ（正特性サーミスタ）を
組合わせ、これらの熱放散状態の変化を検出する灯油検
知素子も知られているが、このものでも同様な問題があ
った。(c) Problems to be Solved by the Invention Since the kerosene detection element of the oil combustion equipment mentioned above consists of a pair of electrodes that detect changes in capacitance, the element is large and requires space for large installation. Not only that, but the configuration of the peripheral circuit becomes complicated, and furthermore, it is difficult to detect even a small amount of kerosene leakage. Additionally, a kerosene detection element is known that combines a plurality of self-heating type thermistors (positive temperature coefficient thermistors) and detects changes in their heat dissipation state, but this element also has the same problem.
この発明は上述した事実に鑑みてなされたものであり、
小型で、かつ、高感度の灯油検知素子を提供することを
目的とする。This invention was made in view of the above facts,
The purpose is to provide a small and highly sensitive kerosene detection element.
（ニ）課題を解決するための手段
この発明では、絶縁基板と、この絶縁基板上に設けられ
た一対の電極と、これらの電極上に設けられた感油膜と
を備え、この感油膜は導電性粉末を含有し、かつ、灯油
に対して膨潤性を有する親油性材料で作られている構成
である。(d) Means for Solving the Problems The present invention includes an insulating substrate, a pair of electrodes provided on the insulating substrate, and an oil-sensitive film provided on these electrodes, and the oil-sensitive film is electrically conductive. It is made of a lipophilic material that contains oily powder and is swellable to kerosene.
また、この発明では、絶縁基板と、この絶縁基板上に設
けられた一対の電極と、これらの電極上に設けられた感
油膜とを備え、この感油膜は導電性粉末を含有したシリ
コーンゴムで作られている構成である。Further, the present invention includes an insulating substrate, a pair of electrodes provided on the insulating substrate, and an oil-sensitive film provided on these electrodes, and the oil-sensitive film is made of silicone rubber containing conductive powder. This is the configuration that has been created.
〈水）作用
灯油が感油膜に接触すると、親油性の感油膜は油分を吸
収し、体積が増加（膨潤）する。この結果、感油膜中に
含まれている導電性粉末相互の接触割合が小さくなり、
電極間の電気抵抗値がスイッチング的に増加するため、
このような電気抵抗値の急激な変化から灯油を検出する
ことが可能である。(Water) Effect When kerosene comes into contact with the oil-sensitive film, the lipophilic oil-sensitive film absorbs the oil and increases in volume (swells). As a result, the contact ratio between the conductive powders contained in the oil-sensitive film becomes smaller,
Since the electrical resistance value between the electrodes increases due to switching,
It is possible to detect kerosene from such a sudden change in electrical resistance value.
また、感油膜の親油性材料として、低温下でも可撓性が
損われないシリコーンゴムを用いることにより、灯油検
知素子は低温雰囲気中でも優れた応答性を発揮する。Moreover, by using silicone rubber, which does not lose its flexibility even at low temperatures, as the lipophilic material of the oil-sensitive film, the kerosene sensing element exhibits excellent responsiveness even in a low-temperature atmosphere.
（へ）実施例 以下、この発明を図面に示す実施例について説明する。(f) Example Hereinafter, embodiments of the present invention shown in the drawings will be described.
第１図及び第２図はこの発明の一実施例の灯油検知素子
（１）を示すものであり、アルミナ磁器（セラミックス
）等の絶縁材料で作られた絶縁基板（２）上に黒鉛等の
カーボンペーストよりなる一対の櫛型対向電極（３）（
４）が印刷等によって設けられている。また、これらの
電極（３）（４＞上には感油膜（５）が設けられている
。（６）（７）は信号取り出し用の端子、（８）（９）
はリード線である。Figures 1 and 2 show a kerosene detection element (1) according to an embodiment of the present invention, in which a layer of graphite or the like is placed on an insulating substrate (2) made of an insulating material such as alumina porcelain (ceramics). A pair of comb-shaped counter electrodes (3) made of carbon paste (
4) is provided by printing or the like. In addition, an oil-sensitive film (5) is provided on these electrodes (3) (4). (6) and (7) are terminals for signal extraction, (8) and (9).
is the lead wire.
感油膜（５）の作製について説明すると、まず、シリコ
ーンゴム（例えば、東しシリコーン社のＣＹ５２−２２
８）２０ｇ番こアセチレンブラ・ンクの粉末３．８ｇと
、溶剤としてのブチルカルピトール（ジエチレングリコ
ールモノブチルエーテル）１５ｃｃとを加え、これらを
よく混合してペースト状にした。次に、このペーストを
前向電極（３）（４）が予め印刷された絶縁基板（２）
上にスクリーン印刷し、最後に、１５０″Ｃで３０分間
焼付けを行い、感油膜（５）を作製した。To explain the preparation of the oil-sensitive film (5), first, silicone rubber (for example, CY52-22 manufactured by Toshi Silicone Co., Ltd.) is used.
8) 3.8 g of 20g acetylene black powder and 15 cc of butylcarpitol (diethylene glycol monobutyl ether) as a solvent were added and mixed well to form a paste. Next, apply this paste to the insulating substrate (2) on which the front electrodes (3) and (4) are pre-printed.
Screen printing was performed on the surface, and finally, baking was performed at 150''C for 30 minutes to produce an oil-sensitive film (5).
上述した灯油検知素子（１）は感油膜（５）に灯油が接
触すると、親油性及び可撓性を有するシリコーンコムが
油分を吸収し、感油膜（５）に含まれるアセチレンブラ
ックの粉末相互の接触割合が小さくなるため、電極（３
）（４）間の抵抗値が第３図に示すようにスイッチング
的に増加した。また、感油膜（５）に灯油が接触してか
ら端子（６）（７）間の抵抗値が１００にΩになるまで
の時間は２０６Ｃの雰囲気中で０．８秒、ｏ ’ｃの雰
囲気中で１．０秒、−２０℃の雰囲気中でも１６６秒で
あった。このように、低温雰囲気中でも応答速度が速い
のは、シリコーンゴムの可撓性が低温下でも保たれるた
めである。また、灯油がなくなると、感油膜（５）中の
灯油が徐々に蒸発し、感油膜（５）の体積が元に戻るの
に伴って端子（６）（７）間の抵抗値もほぼ元の値に減
少した。When kerosene comes into contact with the oil-sensitive film (5), the oleophilic and flexible silicone comb absorbs the oil, and the acetylene black powder contained in the oil-sensitive film (5) interacts with each other. Since the contact ratio is small, the electrode (3
) and (4) increased in a switching manner as shown in FIG. In addition, the time from when kerosene comes into contact with the oil-sensitive film (5) until the resistance value between terminals (6) and (7) becomes 100 Ω is 0.8 seconds in an atmosphere of 206C, and in an atmosphere of o'c. It took 1.0 seconds in the atmosphere, and 166 seconds even in the -20°C atmosphere. The reason why the response speed is fast even in a low temperature atmosphere is because the flexibility of silicone rubber is maintained even at low temperatures. Also, when the kerosene runs out, the kerosene in the oil-sensitive film (5) gradually evaporates, and as the volume of the oil-sensitive film (5) returns to its original value, the resistance value between the terminals (6) and (7) also almost returns to its original value. The value decreased to .
このように、灯油検知素子（１〉は灯油に対する応答速
度が非常に速く、低温雰囲気中でも高感度を示すため、
寒冷地での使用にも十分耐え得るものである。また、絶
縁基板〈２〉上に集積されているため、小型になり、コ
ンパクトに取付けることができ、繰返し使用できるので
、石油暖房機や石油給湯機の油漏れ検知用に最適である
。In this way, the kerosene detection element (1) has a very fast response speed to kerosene and exhibits high sensitivity even in low-temperature atmospheres, so
It can withstand use in cold regions. In addition, since it is integrated on the insulating substrate <2>, it is small, can be installed compactly, and can be used repeatedly, making it ideal for detecting oil leaks in kerosene heaters and kerosene water heaters.
尚、上述した実施例では感油膜（５）の親油性材料とし
てシリコーンゴムを使用したが、親油性材料としては塩
化ビニル、ポリオレフィン（ポリエチレン、ポリプロピ
レン）、ポリエステル、エポキシ、シリコーン、スチレ
ン、ウレタン等のプラスチック材料ヤ、イソピレンゴム
、スチレンゴム、ブタジェンゴム、ブチルゴム、アクリ
ルゴム、ウレタンゴム、クロロブレンゴム等のゴム材料
を使用することができる。これらの中でもゴム材料が応
答性の面で有利であり、特に、シリコーンゴムは低温に
おける可撓性に優れる点で最も好ましい材料である。In the above embodiment, silicone rubber was used as the lipophilic material for the oil-sensitive film (5), but other lipophilic materials such as vinyl chloride, polyolefin (polyethylene, polypropylene), polyester, epoxy, silicone, styrene, urethane, etc. Rubber materials such as plastic materials, isopyrene rubber, styrene rubber, butadiene rubber, butyl rubber, acrylic rubber, urethane rubber, and chloroprene rubber can be used. Among these, rubber materials are advantageous in terms of responsiveness, and in particular, silicone rubber is the most preferred material because it has excellent flexibility at low temperatures.
一方、感油膜（５）に含まれる導電性粉末は化学的、熱
的に安定し、特に、その体積固有抵抗が安定しているこ
とが望ましいため、黒鉛の他にはファーネスブラック、
アセチレンブラック、ケッチンブラック等のカーボン粉
が適している。On the other hand, the conductive powder contained in the oil-sensitive film (5) is chemically and thermally stable, and in particular, it is desirable that its volume resistivity be stable.
Carbon powders such as acetylene black and Ketin black are suitable.
また、感油膜（５）に灯油が接触した際の感油膜（５）
の体積膨張率は１０％以上が望ましく、このために、親
油性材料１００重量部に対して導電性粉末が１０〜１０
０重量部の割合になるように、導電性粉末を親油性材料
中に分散させると良い。In addition, the oil-sensitive film (5) when kerosene comes into contact with the oil-sensitive film (5)
It is desirable that the volume expansion coefficient of is 10% or more, and for this purpose, the conductive powder should be added in an amount of 10 to 10 parts by weight per 100 parts by weight of the lipophilic material.
The conductive powder is preferably dispersed in the lipophilic material at a ratio of 0 parts by weight.
（ト）発明の効果
この発明は以上のように構成されているので、小型にな
り、コンパクトに設置できるばかりでなく、応答性に優
れ、高感度の灯油検知素子を提供することができ、特性
にばらつきが少なく、大量生産にも適している。(G) Effects of the Invention Since the present invention is configured as described above, it is not only possible to reduce the size and install it compactly, but also to provide a kerosene detection element with excellent responsiveness and high sensitivity. It has little variation and is suitable for mass production.
また、請求項２の灯油検知素子においては、低温雰囲気
中でも優れた応答性が得られるため、寒冷地で使用され
る石油燃焼機器の油漏れ検知用としても利用できる。Furthermore, since the kerosene detection element according to the second aspect of the present invention provides excellent responsiveness even in a low temperature atmosphere, it can also be used for detecting oil leaks in oil burning equipment used in cold regions.
第１図はこの発明の一実施例を示す灯油検知素子の平面
図、第２図は第１図のＡ−Ａ’線に沿う部分の断面図、
第３図は灯油検知素子の灯油感度特性説明図である。
（１）・・・灯油検知素子、 （２）・・・絶縁基板、
（３）（４）・・・電極、 （５）・・・感油膜。FIG. 1 is a plan view of a kerosene detection element showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a portion taken along line A-A' in FIG.
FIG. 3 is an explanatory diagram of the kerosene sensitivity characteristics of the kerosene detection element. (1)...kerosene detection element, (2)...insulating substrate,
(3) (4)... Electrode, (5)... Oil-sensitive film.
Claims (2)
電極と、これらの電極上に設けられた感油膜とを備え、
この感油膜は導電性粉末を含有し、かつ、灯油に対して
膨潤性を有する親油性材料で作られていることを特徴と
する灯油検知素子。(1) An insulating substrate, a pair of electrodes provided on the insulating substrate, and an oil-sensitive film provided on these electrodes,
A kerosene sensing element characterized in that the oil-sensitive film contains conductive powder and is made of a lipophilic material that is swellable to kerosene.
電極と、これらの電極上に設けられた感油膜とを備え、
この感油膜は導電性粉末を含有したシリコーンゴムで作
られていることを特徴とする灯油検知素子。(2) comprising an insulating substrate, a pair of electrodes provided on the insulating substrate, and an oil-sensitive film provided on these electrodes,
This kerosene detection element is characterized in that this oil-sensitive film is made of silicone rubber containing conductive powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25026489A JPH03111751A (en) | 1989-09-26 | 1989-09-26 | Kerosene detecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25026489A JPH03111751A (en) | 1989-09-26 | 1989-09-26 | Kerosene detecting element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03111751A true JPH03111751A (en) | 1991-05-13 |
Family
ID=17205304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25026489A Pending JPH03111751A (en) | 1989-09-26 | 1989-09-26 | Kerosene detecting element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03111751A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482678A (en) * | 1993-05-25 | 1996-01-09 | Rosemount Inc. | Organic chemical sensor |
-
1989
- 1989-09-26 JP JP25026489A patent/JPH03111751A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482678A (en) * | 1993-05-25 | 1996-01-09 | Rosemount Inc. | Organic chemical sensor |
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