JPH03111750A - Kerosene detecting element - Google Patents
Kerosene detecting elementInfo
- Publication number
- JPH03111750A JPH03111750A JP25026389A JP25026389A JPH03111750A JP H03111750 A JPH03111750 A JP H03111750A JP 25026389 A JP25026389 A JP 25026389A JP 25026389 A JP25026389 A JP 25026389A JP H03111750 A JPH03111750 A JP H03111750A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- kerosene
- sensitive film
- strain gage
- strain
- 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 47
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 10
- 239000004945 silicone rubber Substances 0.000 claims abstract description 10
- 239000008206 lipophilic material Substances 0.000 claims abstract description 9
- 239000010408 film Substances 0.000 abstract description 22
- 239000000758 substrate Substances 0.000 abstract description 7
- 239000010409 thin film Substances 0.000 abstract description 4
- 239000004642 Polyimide Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 abstract description 2
- 229920001721 polyimide Polymers 0.000 abstract description 2
- 239000004065 semiconductor Substances 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
- 230000001771 impaired effect Effects 0.000 abstract 1
- 230000002522 swelling effect Effects 0.000 abstract 1
- 238000007740 vapor deposition Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 18
- 230000035945 sensitivity Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 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
- 230000004043 responsiveness Effects 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 239000002828 fuel tank 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
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
- 230000004044 response Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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・Ｘ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 that use kerosene as fuel, 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 from a fuel tank.
（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
部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させるもの
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 the lower part of the combustion equipment, and if kerosene leaks due to a malfunction of a part of the equipment or carelessness in handling, a signal from the kerosene detection element is sent. It has been proposed to activate 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 circuitry is 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
この発明では歪ゲージと、この歪ゲージ上に設けられた
感油膜とを備え、この感油膜が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 a strain gauge and an oil-sensitive film provided on the strain gauge, and the oil-sensitive film is made of a lipophilic material that is swellable to kerosene. This is a configuration where there is
また、上述した灯油検知素子は親油性材料をシリコーン
ゴムとした構成である。Further, the above-mentioned kerosene detection element has a structure in which the lipophilic material is silicone rubber.
（ホ）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、歪ゲージの
否検知部分に加わる歪が大きくなり、その出力が変化す
るため、歪ゲージの出力によって灯油を検知することが
可能である。(e) 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 strain applied to the non-detectable portion of the strain gauge increases and its output changes, so it is possible to detect kerosene based on the output of the strain gauge.
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。(to) Examples 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、この灯油検知素子（１）は歪
ゲージ（２）とこの歪ゲージ（２）上に設けられた感油
膜（３）とを備えている。歪ゲージ（２）は可撓性（柔
軟性）のあるポリイミド等の絶縁性基板（４）を有し、
この基板（４）上に否検知電極（５〉が設けられている
。この否検知電極（５）は磁性合金、あるいはピエゾ抵
抗体等の半導体薄膜を基板（４）上に蒸看等により形成
したものである。また、感油膜（３）は次のようにして
歪ゲージ（２）上に形成されている。FIGS. 1 and 2 show a kerosene sensing element (1) according to an embodiment of the present invention, and this kerosene sensing element (1) includes a strain gauge (2) and a strain gauge (2) provided on the strain gauge (2). and an oil-sensitive film (3). The strain gauge (2) has a flexible (flexible) insulating substrate (4) made of polyimide or the like,
A non-detection electrode (5>) is provided on this substrate (4).This non-detection electrode (5) is formed by forming a semiconductor thin film such as a magnetic alloy or a piezoresistor on the substrate (4) by vaporization or the like. The oil-sensitive film (3) is formed on the strain gauge (2) in the following manner.
まず、シリコーンゴム（例えば、東しシリコーン社のＣ
Ｙ５２−２２８）Ｌｏｇに溶剤としてブチルカルピトー
ル（ジエチレングリコールモツプチルエーテル）２０ｃ
ｃを加えて液状とした。次に、この溶液を高速回転して
いる円板（図示せず）の上に載せた歪ゲージ（２）に滴
下し、遠心力を利用して薄膜にした。然る後、１６０°
Ｃで、３０分間焼付けを行い、歪ゲージ（２）上に約１
０〜２０μｍの厚さの感油膜（３）が形成された。First, silicone rubber (for example, Toshi Silicone Co., Ltd.'s C
Y52-228) Butylcarpitol (diethylene glycol motuptyl ether) 20c as a solvent in Log
c was added to make it liquid. Next, this solution was dropped onto a strain gauge (2) placed on a disk (not shown) rotating at high speed, and was formed into a thin film using centrifugal force. After that, 160°
Bake for 30 minutes at C, and approximately 1
An oil-sensitive film (3) with a thickness of 0 to 20 μm was formed.
上述した灯油検知素子（１）の出力端子（６）（７）を
リード線（８）（９）を介して第３図に示すようにホイ
ーストンブリッジ回路（１０）に接続し、灯油検知素子
（１）の灯油感度特性を調べた。すなわち、このホイー
ストンブリッジ回路（１０）において、抵抗（１１〉な
いしく１３）の抵抗値を灯油がないときの灯油検知素子
（１）の電極（５）の抵抗値と略等しく設定（例えばＩ
ＫΩ）し、入力電圧を一定として出力電圧ｖＯを測定し
た。この結果、感油膜（３）に灯油が接触すると、第４
図に示すように、僅か２秒足らずで出力電圧が５０ｍＶ
から４００ｍＶ以上に上昇し、良好な灯油感度特性を示
した。これは、感油膜（３）に灯油が接触すると、親油
性及び可視性を有するシリコーンゴムで作られた感油膜
（３）が油分を吸収して膨潤し、感油膜（３）によって
否検知電極（５）に加わる歪が大きくなり、電極（５）
の部材の原子間隔が大きくなって抵抗値が大きくなるた
めである。また、灯油がなくなると、感油膜（３）中の
灯油が徐々に蒸発し、感油膜（３）の体積が元に戻るの
に伴って電極（５）の抵抗値が減少し、出力電圧ｖＯが
元の電圧値に減少した。さらにまた、シリコーンゴムの
可撓性が低温下でも良好に保たれるため、低温雰囲気（
例えば−２０°Ｃ）中でもほぼ同等な灯油感度特性が得
られた。The output terminals (6) and (7) of the above-mentioned kerosene detection element (1) are connected to the Wheatstone bridge circuit (10) via the lead wires (8) and (9) as shown in Fig. 3, and the kerosene detection element The kerosene sensitivity characteristics of (1) were investigated. That is, in this Wheatstone bridge circuit (10), the resistance value of the resistor (11> or 13) is set approximately equal to the resistance value of the electrode (5) of the kerosene detection element (1) when there is no kerosene (for example, I
KΩ), and the output voltage vO was measured with the input voltage constant. As a result, when kerosene comes into contact with the oil-sensitive film (3), the fourth
As shown in the figure, the output voltage is 50mV in just 2 seconds.
The voltage rose from 400 mV to 400 mV or more, showing good kerosene sensitivity characteristics. This is because when the oil-sensitive film (3) comes into contact with kerosene, the oil-sensitive film (3) made of lipophilic and visible silicone rubber absorbs the oil and swells, causing the oil-sensitive film (3) to become a non-detectable electrode. The strain applied to (5) increases, and the electrode (5)
This is because the atomic distance of the member increases and the resistance value increases. Moreover, when the kerosene runs out, the kerosene in the oil-sensitive film (3) gradually evaporates, and as the volume of the oil-sensitive film (3) returns to its original value, the resistance value of the electrode (5) decreases, and the output voltage vO has decreased to its original voltage value. Furthermore, since the flexibility of silicone rubber is maintained well even at low temperatures,
For example, almost the same kerosene sensitivity characteristics were obtained even at -20°C.
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
縁性基板（４）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 a low temperature atmosphere.
It can withstand use in cold regions. In addition, since it is integrated on the insulating substrate (4), it is compact.
It 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（３）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、ホリブロビ
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や、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−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 (3), but other lipophilic materials such as vinyl chloride, polyolefin (polyethylene, hollybropylene), polyester, epoxy, silicone, styrene, urethane, etc. Plastic materials and rubber materials such as isopyrene rubber, styrene rubber, butadiene rubber, butyl rubber, acrylic rubber, urethane rubber, and chloroprene rubber can be used. Among these materials, rubber materials are advantageous in terms of responsiveness, and silicone rubber is the most preferred material in particular because it has excellent flexibility at low temperatures.
（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, the kerosene detection element according to the second aspect of the present invention provides excellent responsiveness even in a low-temperature atmosphere, so 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図は灯油感度測定用の電気結線図、第４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）・・・歪ゲージ、
（３）・・・感油膜。
第
第
図
第
図
■。
第
図
○
０
晴間 （冬少）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 electrical wiring diagram for measuring kerosene sensitivity, and FIG. 4 is an explanatory diagram of kerosene sensitivity characteristics of the kerosene detection element. (1) Kerosene detection element, (2) Strain gauge,
(3)...Oil-sensitive film. Figure Figure ■. Figure ○ 0 Clear skies (less winter)
Claims (2)
とを備え、この感油膜が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) A kerosene sensing element comprising a strain gauge and an oil-sensitive film provided on the strain gauge, the oil-sensitive film being made of a lipophilic material that swells with kerosene.
囲第１項記載の灯油検知素子。(2) The kerosene sensing element according to claim 1, wherein the lipophilic material is silicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25026389A JPH03111750A (en) | 1989-09-26 | 1989-09-26 | Kerosene detecting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25026389A JPH03111750A (en) | 1989-09-26 | 1989-09-26 | Kerosene detecting element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03111750A true JPH03111750A (en) | 1991-05-13 |
Family
ID=17205289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25026389A Pending JPH03111750A (en) | 1989-09-26 | 1989-09-26 | Kerosene detecting element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03111750A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994028372A1 (en) * | 1993-05-25 | 1994-12-08 | Rosemount Inc. | Organic chemical sensor |
| US6842965B2 (en) * | 2000-12-28 | 2005-01-18 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing a strain detector |
-
1989
- 1989-09-26 JP JP25026389A patent/JPH03111750A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994028372A1 (en) * | 1993-05-25 | 1994-12-08 | Rosemount Inc. | Organic chemical sensor |
| US5482678A (en) * | 1993-05-25 | 1996-01-09 | Rosemount Inc. | Organic chemical sensor |
| US6842965B2 (en) * | 2000-12-28 | 2005-01-18 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing a strain detector |
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