JPS60198444A - Humidity sensor - Google Patents
Humidity sensorInfo
- Publication number
- JPS60198444A JPS60198444A JP5471484A JP5471484A JPS60198444A JP S60198444 A JPS60198444 A JP S60198444A JP 5471484 A JP5471484 A JP 5471484A JP 5471484 A JP5471484 A JP 5471484A JP S60198444 A JPS60198444 A JP S60198444A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- water
- humidity
- comb
- lead
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、池）度制御器に使Ｊ１１する湿度センサの構
成とりわけ雰囲気安定性の向１−に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure of a humidity sensor used in a humidity controller, particularly to the direction of atmospheric stability.
従来例の構成とその問題点
従来の例えば自動調理が＋ｉＪ能な加熱ｖ１１１理畳に
おいては調理物の加熱進行状態を検知するため、一部に
湿度センサが用いられている１゜
例えば電子レンジにおいては、加熱中の調理物から放出
する蒸気を検知して、これに要した加熱時間Ｔ１に調理
物により定まる定数Ｋを乗じた時間ＫＴｌを追加熱する
、いわゆるに値制御によって加熱を制御している。第１
図はかかるセンサの斜視図である。感湿セラミック１の
周囲にヒータ２を配し、夫々の２個のリードをコムリー
ド部が支持している。コノ、リード４を円蓋支持するセ
ンサベース４はネソ１−カバー５でおおわれている。Conventional structure and its problems In conventional heating v111 ovens that are capable of automatic cooking, for example, a humidity sensor is used in some parts to detect the progress of heating the food. The heating is controlled by so-called value control, which detects the steam emitted from the food being heated and adds heat for a time KTl, which is the heating time T1 required for this multiplied by a constant K determined by the food. There is. 1st
The figure is a perspective view of such a sensor. A heater 2 is arranged around a humidity-sensitive ceramic 1, and a comb lead part supports each two leads. The sensor base 4 supporting the lead 4 is covered with a cover 5.
ネットカバー５は固定リング６によりセンサベース４に
固定支持されている。The net cover 5 is fixedly supported on the sensor base 4 by a fixing ring 6.
第２図に湿度センサ７の感湿特性を示す１．湿度３ ・
：
センサは雰囲気中の湿度ＨＡに於て抵抗値ＲＡを示し、
調理物の加熱によって出る蒸気により庫内湿度がＨＢに
変化する事によってその抵抗値は）ｔＢとなりこれをも
って検知点とし、制御回路は加熱手段を制御する。FIG. 2 shows the humidity sensitivity characteristics of the humidity sensor 7.1. Humidity 3 ・
: The sensor shows resistance value RA at atmospheric humidity HA,
When the humidity inside the refrigerator changes to HB due to the steam produced by heating the food, the resistance value becomes )tB, which is used as the detection point, and the control circuit controls the heating means.
従来湿度センサはしばしばセンサベース４の表面に結露
を起こし、その表面抵抗を著しるしく低下させる。結露
は気象の急激な変化、あるいは庫内に十分蒸気を含んだ
ままの放置等により容易に生じる事が確認される。セン
サベースを構成するセラミック材料或いは熱可塑性プラ
スチック材料は親水性である為、あるいは表面の若干の
汚れでも表面張力の小さい表面状態を作る。従って表面
か一面にぬれ易く、コムリード間の絶縁抵抗を悪化させ
、センサ抵抗か正しく湿度情報を制御器に伝達する事を
防げる。Conventional humidity sensors often generate condensation on the surface of the sensor base 4, significantly reducing its surface resistance. It has been confirmed that condensation easily occurs due to sudden changes in the weather or when the refrigerator is left with sufficient steam inside. Since the ceramic material or thermoplastic material constituting the sensor base is hydrophilic, even slight dirt on the surface creates a surface condition with low surface tension. Therefore, the entire surface is likely to get wet, worsening the insulation resistance between the comb leads, and preventing the sensor resistance from correctly transmitting humidity information to the controller.
その結果しばしば、オート調理に支障をきたす事があっ
た。問題解決の一方法として、発明者は第３図の如く、
センサベース表面に抗水性皮膜８を形成する提案を行っ
た。この提案は通常の露結に対しては、露結が水玉状の
形状をとり、表面の一部が水玉に覆われるたけなのでセ
ンサベース表面の表面抵抗を著じるしく悪化するのを防
１トでき有効な提案であった。As a result, automatic cooking was often disrupted. As a way to solve the problem, the inventor proposed the following method as shown in Figure 3.
A proposal was made to form a water-resistant film 8 on the surface of the sensor base. This proposal prevents normal dew condensation from significantly deteriorating the surface resistance of the sensor base surface because the dew condensation takes the form of droplets and only part of the surface is covered with droplets. It was an effective proposal.
しかし、より多量の露結を想定したとき、水玉がコムリ
ードにまといつき、更に、露結が進行すると、まといつ
いた水玉が、大きさを増しついには互いに接触し、セン
サの動作不良に到る事が判明した。However, when a larger amount of dew condensation is assumed, the water beads cling to the com lead, and as the dew condensation progresses, the clinging water beads increase in size and eventually come into contact with each other, leading to sensor malfunction. It turned out that
発明の目的
本発明は」ユ記従来の欠点を解消するもので、結露が生
じても容易にセンサ抵抗に異常を起こす事なく、安定な
自動制御を行える湿度センサを提供することを目的とす
る。OBJECTS OF THE INVENTION The present invention solves the drawbacks of the conventional technology, and aims to provide a humidity sensor that can perform stable automatic control without easily causing abnormalities in sensor resistance even when condensation occurs. .
発明の構成
上記目的を達するため、本発明のｙ！ｍ Ｊ９ｊセンサ
は、センサベース表面およびコムリートの一部にも一体
構造に抗水性塗膜を形成し、その結果、結露した水分は
高い表面張力によって水玉状に維持され５”゛
表面張力によりせり上り端子間絶縁を悪化させる様な規
模の結露に対しても、十分高い表面抵抗を実現でき、従
来の結露による湿度検出不能と云った事態を解消でき、
安定した湿度制御ができるという効果を有する。Structure of the Invention In order to achieve the above object, the present invention has y! m The J9j sensor has a water-resistant coating formed integrally on the sensor base surface and a part of the COMLET, and as a result, the condensed water is maintained in the form of droplets due to the high surface tension and rises up by 5" due to the surface tension. It is possible to achieve a sufficiently high surface resistance even against condensation of a scale that deteriorates the insulation between terminals, and eliminates the conventional situation where humidity cannot be detected due to condensation.
This has the effect of stably controlling humidity.
実施例の説明
以下、本発明の一実施例について、図面に基づいて説明
する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
（１）第４図において、湿度センサ７はセンサ構造の概
略を示したものである。コムリード３を固定支持するセ
ンサベース４にネットカバー５が固定リング６により固
定されている。感湿セラミック１を囲んでヒータ２が配
置され夫々のリードは上記コムリード４に電気的および
機械的に接続支持されている。本発明はこの構成に更に
センサベース４の表面に抗水性皮膜を形成する事によっ
て達成できる。上記抗水性皮膜を形成する為、ポリアミ
ド樹１１ｈ（桜宮化学社製５Ｋ−６０００）を上記ベー
ス表面およびコムリードの下端部にスプレー１．７１り
晶ＦＡノ＋ｒ千 ｔ 枠ノ汁１＋’２て亜喜Ｒ分１寸；
藏Ｉ Ｓ ｆｒ治１１マクマスクした。）２ｏｏ′Ｃ１
５分間焼イ」けを行−）だ。(1) In FIG. 4, the humidity sensor 7 schematically shows the structure of the sensor. A net cover 5 is fixed by a fixing ring 6 to a sensor base 4 that fixedly supports the com lead 3. A heater 2 is arranged surrounding the humidity sensitive ceramic 1, and each lead is electrically and mechanically connected and supported by the comb lead 4. The present invention can be achieved by further forming a water-resistant film on the surface of the sensor base 4 in addition to this configuration. To form the above water-resistant film, spray polyamide wood 11h (5K-6000 manufactured by Sakuramiya Chemical Co., Ltd.) on the base surface and the lower end of the com lead. Aki R minute 1 sun;
藏IS frji 11 masked. )2oo'C1
Bake for 5 minutes.
通常の抗水性能の一つの目安である水滴の接触角の測定
では、８０度以」−が実測され良好な皮膜が得られた０
、第５図は従来センサと本発明にょるセンサを３５’０
９５％の雰囲気に実測状態で放置し、センサ抵抗の経時
変化を実測したデータである。In the measurement of the contact angle of water droplets, which is a standard measure of water resistance performance, a contact angle of 80 degrees or more was actually measured, indicating that a good film was obtained.
, Figure 5 shows the conventional sensor and the sensor according to the present invention at 35'0.
This is data obtained by actually measuring the change in sensor resistance over time after being left in a 95% atmosphere under actual measurement conditions.
従来センサは水分の結露による端子短絡の為、短時間で
異常抵抗を示すのに比し、本発明のものは、雰囲気湿度
を正しく示す抵抗値を維持している。While conventional sensors exhibit abnormal resistance in a short period of time due to terminal short-circuiting due to moisture condensation, the sensor of the present invention maintains a resistance value that accurately indicates atmospheric humidity.
（２）同様な方法により、テフロン樹脂（ポリフロンエ
ナメルＥＳ５１０９ＢＫダイキン工業製）を浸漬法によ
り塗布し３００’Ｃで焼成し、皮膜を形成した。特性は
アミド系のものと同様であった。(2) In a similar manner, Teflon resin (Polyflon Enamel ES5109BK manufactured by Daikin Industries) was applied by dipping and baked at 300'C to form a film. The properties were similar to those of the amide type.
（３）同様の方法により、ボロン添加のシリコン樹脂（
ボロシロキサン樹脂ＳＭＲ〜３２、昭和電線電螺社製）
を塗布し３００’Ｃで焼付けし皮膜を形成した。特性は
アミド系のものと同様であった。っさて本発明の目指す
所は、表面張力等によって露結した水分がコムリードに
まといついて、はい上る事によってコムリード間の絶縁
が悪化するのを防止するものである。(3) Using the same method, boron-added silicone resin (
Borosiloxane resin SMR~32, manufactured by Showa Cable Denrosha)
was applied and baked at 300'C to form a film. The properties were similar to those of the amide type. The purpose of the present invention is to prevent deterioration of the insulation between the com leads due to moisture condensed due to surface tension clinging to the com leads and climbing up.
発明の効果
以」―のように本発明によれば次の効果を得ることがで
きる。According to the present invention, the following effects can be obtained.
（１） センサの結露による動作不良を防ぐ事ができる
。(1) Malfunctions due to sensor condensation can be prevented.
（２）本センサを使用する事により、安全な制御器を設
８１することができる。(2) By using this sensor, a safe controller can be installed 81.
（３）ベース全体をおおう量の露結が生じた場合でも、
コム端子間の絶縁を維持でき、広範な露結に際しても全
く異常動作を起こさないセンサを準備しうる。(3) Even if there is enough dew condensation to cover the entire base,
It is possible to prepare a sensor that can maintain insulation between comb terminals and that does not cause any abnormal operation even when there is extensive dew condensation.
第１図は従来の湿度センサの斜視図、第２図は湿度とセ
ンサ抵抗の関係を示す図、第３図は同湿度センサの断面
図、第４図は本発明の一実施例を示す断面図、第５図は
センサ抵抗の経時変化状態を示す榊魯図である。
１・・・・・・感湿セラミック、２・・・・・・ヒータ
、４・・・・・・センサベース、８・・・・・・抗水性
皮膜。
第１図
第２図
湿凌FIG. 1 is a perspective view of a conventional humidity sensor, FIG. 2 is a diagram showing the relationship between humidity and sensor resistance, FIG. 3 is a cross-sectional view of the same humidity sensor, and FIG. 4 is a cross-section showing an embodiment of the present invention. FIG. 5 is a Sakaki diagram showing how the sensor resistance changes over time. 1... Moisture sensitive ceramic, 2... Heater, 4... Sensor base, 8... Water resistant film. Figure 1 Figure 2 Moisture
Claims (4)
を加熱するヒータと、上記素子およびヒータを支えるコ
ムリードと、端子を固定するセンサベースと、センサベ
ース表面をおおう抗水性皮膜とを備え、前記抗水性皮膜
をコムリード部の一部にも、」二記センサベース皮膜と
一体化して形成してなる構成とした湿度センサ。(1) Equipped with a resistance element whose resistance changes depending on humidity, a heater that heats the resistance element, a com lead that supports the element and the heater, a sensor base that fixes the terminal, and a water-resistant film that covers the surface of the sensor base. 2. A humidity sensor having a structure in which the water-resistant coating is also formed on a part of the com lead part and integrated with the sensor base coating described in 2.
した特許請求の範囲第１項記載の湿度センサ。(2) The humidity sensor according to claim 1, wherein an imide resin film is attached as a water-resistant film.
とした特許請求の範囲第１項記載の湿度セン九(3) The humidity sensor according to claim 1, which has a structure in which a Teflon resin film is attached as a water-resistant film.
を付する構成とした特許請求の範囲第１項記載の湿度セ
ンサ。(4) The humidity sensor according to claim 1, wherein a boron-added silicone resin film is attached as the water-resistant film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5471484A JPS60198444A (en) | 1984-03-21 | 1984-03-21 | Humidity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5471484A JPS60198444A (en) | 1984-03-21 | 1984-03-21 | Humidity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60198444A true JPS60198444A (en) | 1985-10-07 |
Family
ID=12978472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5471484A Pending JPS60198444A (en) | 1984-03-21 | 1984-03-21 | Humidity sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60198444A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007232406A (en) * | 2006-02-27 | 2007-09-13 | Fis Inc | Gas detector |
-
1984
- 1984-03-21 JP JP5471484A patent/JPS60198444A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007232406A (en) * | 2006-02-27 | 2007-09-13 | Fis Inc | Gas detector |
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