JPH0321483Y2 - - Google Patents
Info
- Publication number
- JPH0321483Y2 JPH0321483Y2 JP18544084U JP18544084U JPH0321483Y2 JP H0321483 Y2 JPH0321483 Y2 JP H0321483Y2 JP 18544084 U JP18544084 U JP 18544084U JP 18544084 U JP18544084 U JP 18544084U JP H0321483 Y2 JPH0321483 Y2 JP H0321483Y2
- Authority
- JP
- Japan
- Prior art keywords
- container
- positive electrode
- sensor
- current collector
- oxygen
- 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.)
- Expired
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 30
- 229910052760 oxygen Inorganic materials 0.000 claims description 30
- 239000001301 oxygen Substances 0.000 claims description 30
- 230000003197 catalytic effect Effects 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000008151 electrolyte solution Substances 0.000 claims description 3
- 239000000025 natural resin Substances 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229940046892 lead acetate Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案はガルバニ電池式酸素センサーに関する
ものである。さらに詳しくは、本考案は、酸素の
電解還元に有効な触媒電極からなる正極と鉛から
なる負極と電解液と隔膜と容器とから構成される
ガルバニ電池式酸素センサーに関するものであ
る。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a galvanic cell type oxygen sensor. More specifically, the present invention relates to a galvanic cell type oxygen sensor comprising a positive electrode made of a catalytic electrode effective for electrolytic reduction of oxygen, a negative electrode made of lead, an electrolytic solution, a diaphragm, and a container.
ガルバニ電池式酸素センサーは、小形、軽量で
あるとともに常温で作動し、しかも安価であるた
め、船倉やマンホールの酸欠状態をチエツクした
り、麻酔器、人口呼吸器などの医療機器における
酸素濃度の検出のため等、広い分野で使用されて
いる。 Galvanic cell-type oxygen sensors are small, lightweight, operate at room temperature, and are inexpensive, so they can be used to check oxygen deficiency conditions in ship holds and manholes, and to check oxygen concentration in medical equipment such as anesthesia machines and artificial respirators. It is used in a wide range of fields, such as for detection.
従来の技術
ガルバニ電池式酸素センサーは、触媒電極から
なる正極と鉛からなる負極と電解液と隔膜と容器
とから構成されているのが通例である。BACKGROUND OF THE INVENTION A galvanic cell type oxygen sensor is usually composed of a positive electrode made of a catalytic electrode, a negative electrode made of lead, an electrolyte, a diaphragm, and a container.
従来は、センサーの容器の中に電解液が充満さ
れているのが普通であるが、この場合には、酸素
センサーのおかれる雰囲気気体の温度が高く、相
対湿度が低いと、電解液中の水分が隔膜を通して
蒸発し、センサー内圧が低下する。逆に雰囲気気
体の温度が低く、相対湿度が高いと、雰囲気気体
中の水分が電解液に吸収され、センサー内圧が上
昇する。 Conventionally, the sensor container is usually filled with electrolyte, but in this case, if the temperature of the atmospheric gas in which the oxygen sensor is placed is high and the relative humidity is low, the electrolyte Water evaporates through the diaphragm and the sensor internal pressure decreases. Conversely, when the temperature of the atmospheric gas is low and the relative humidity is high, moisture in the atmospheric gas is absorbed by the electrolyte, increasing the sensor internal pressure.
このようなセンサー内圧の変動を抑止するため
に、本願考案者らは、すでに、センサー容器の中
に電解液を充満させずに一部空間部を残しておく
という方法を提案した。 In order to suppress such fluctuations in the internal pressure of the sensor, the inventors of the present application have already proposed a method in which a sensor container is not filled with electrolyte, but instead leaves some space.
考案が解決しようとする問題点
容器の中に一部空間部を残しておくと、溶存酸
素によるゼロ点の移動とセンサーに振動を加えた
際に起るセンサー出力の変動という問題が出てく
る。Problems that the invention aims to solve: If some space is left inside the container, there will be problems such as movement of the zero point due to dissolved oxygen and fluctuations in the sensor output that occur when vibration is applied to the sensor. .
問題点を解決するための手段
本考案は、正極集電体の容器内に位置する部分
を合成樹脂もしくは天然樹脂によつて絶縁被覆す
ることによつて、上述の如き問題点を解決せんと
するものである。Means for Solving the Problems The present invention attempts to solve the above-mentioned problems by insulatingly covering the portion of the positive electrode current collector located inside the container with synthetic resin or natural resin. It is something.
作 用
センサー容器の中に一部空間部を残しておく
と、空間部の空気中の酸素が溶存する。またこの
溶存酸素量はセンサーに振動を加えると変動す
る。しかるに、従来は金属からなる正極集電体が
センサー容器の内部に直接電解液および空間部の
空気に接触していたが、多くの場合、この正極集
電体がわずかではあるが酸素の電解還元触媒能を
有しているため、この正極集電体近傍の溶存酸素
がセンサー出量に影響を及ぼす。例えば、酸素セ
ンサーがおかれる雰囲気気体の酸素濃度が0%で
あれば、センサー出力は0Vでなければならない
が、実際には上述の溶存酸素の正極集電体上での
反応のために、数mVの出力が出てきてゼロ点が
移動する。また、振動を加えた際、溶存酸素量が
変動すると、やはり、センサー出力が変動する。
これに対して、正極集電体を絶縁被覆すると正極
集電体と電解液との直接的接触が回避されるの
で、正極集電体上での酸素の電解還元反応も起ら
なくなり、センサー出力への溶存酸素の影響がな
くなる。Effect If some space is left in the sensor container, oxygen in the air in the space will dissolve. The amount of dissolved oxygen also changes when vibration is applied to the sensor. However, in the past, the positive electrode current collector made of metal was in direct contact with the electrolyte and the air in the space inside the sensor container, but in many cases, this positive electrode current collector caused electrolytic reduction of oxygen, albeit to a small extent. Since it has catalytic ability, dissolved oxygen near this positive electrode current collector affects the sensor output. For example, if the oxygen concentration of the atmospheric gas in which the oxygen sensor is placed is 0%, the sensor output should be 0V, but in reality, due to the above-mentioned reaction of dissolved oxygen on the positive electrode current collector, several mV output comes out and the zero point moves. Furthermore, if the amount of dissolved oxygen changes when vibration is applied, the sensor output will also change.
On the other hand, when the positive electrode current collector is insulated, direct contact between the positive electrode current collector and the electrolyte is avoided, so the electrolytic reduction reaction of oxygen on the positive electrode current collector also does not occur, and the sensor output The effect of dissolved oxygen on
絶縁被覆材としては合成樹脂もしくは天然樹脂
を塗布するか、合成樹脂のチユーブを巻きつける
方法が有効である。 As the insulating coating material, it is effective to apply a synthetic resin or natural resin, or to wrap a tube of synthetic resin around it.
実施例
第1図は本考案の一実施例にかかるガルバニ電
池式酸素センサーの断面構造を示す。Embodiment FIG. 1 shows a cross-sectional structure of a galvanic cell type oxygen sensor according to an embodiment of the present invention.
容器本体1と容器蓋2との間に、押え板3、O
リング4、4フツ化エチレン−6フツ化プロピレ
ンコポリマーの膜からなる隔膜5、金からなる正
極6、カーボンペーパーからなる中間集電体7、
チタン線からなる正極集電体8とが収納されネジ
締めされている。隔膜5には正極6が真空蒸着さ
れている。容器1内には酢酸と酢酸カリと酢酸鉛
との混合水溶液からなる電解液9および鉛からな
る負極10が収納されている。また容器内には空
間部11が用意されている。正極集電体8にはポ
リ塩化ビニル製の熱収縮性絶縁チユーブ12が被
覆されている。 Between the container body 1 and the container lid 2, there is a presser plate 3, O
a ring 4, a diaphragm 5 made of a film of tetrafluoroethylene-hexafluoropropylene copolymer, a positive electrode 6 made of gold, an intermediate current collector 7 made of carbon paper,
A positive electrode current collector 8 made of a titanium wire is housed and screwed together. A positive electrode 6 is vacuum deposited on the diaphragm 5 . The container 1 contains an electrolytic solution 9 made of a mixed aqueous solution of acetic acid, potassium acetate, and lead acetate, and a negative electrode 10 made of lead. Furthermore, a space 11 is provided within the container. The positive electrode current collector 8 is covered with a heat-shrinkable insulating tube 12 made of polyvinyl chloride.
正極と負極との間には温度補償のためのサーミ
スター13および抵抗14が接続されている。 A thermistor 13 and a resistor 14 for temperature compensation are connected between the positive electrode and the negative electrode.
考案の効果
実施例で得られたガルバニ電池式酸素センサー
をAとし、実施例において、熱収縮性チユーブ1
2を被覆しない場合の従来型センサーをBとし、
それぞれの酸素濃度−出力特性を比較したとこ
ろ、第2図に示す通りとなつた。すなわち、従来
品Bの場合にはゼロ点が移動しているのに対し、
本考案品Aの場合にはゼロ点を通つている。一
方、酸素センサーを静止しておいて、あるとき酸
素センサーを叩いた場合の出力の経時変化を比較
したところ、第3図に示す結果が得られた。すな
わち、従来品Bの場合には出力の変動が起るのに
対し、本考案品Aの場合には出力が全く変動しな
いことがわかる。Effect of the invention The galvanic cell type oxygen sensor obtained in the example is referred to as A, and in the example, the heat-shrinkable tube 1
The conventional sensor without coating 2 is designated as B,
When the oxygen concentration-output characteristics of each were compared, the results were as shown in FIG. In other words, while the zero point has moved in the case of conventional product B,
In the case of product A of the present invention, it passes through the zero point. On the other hand, when the oxygen sensor was kept stationary and the output over time was compared when the oxygen sensor was struck at some point, the results shown in FIG. 3 were obtained. That is, it can be seen that in the case of the conventional product B, the output fluctuates, whereas in the case of the product A of the present invention, the output does not fluctuate at all.
第1図は本考案の一実施例にかかるガルバニ電
池式酸素センサーの断面構造を示した図、第2図
は本考案ガルバニ電池式酸素センサーAの酸素濃
度−出力特性を従来品Bのそれとの比較のもとに
示した図、第3図は本考案ガルバニ電池式酸素セ
ンサーAの経時変化を従来品Bのそれとの比較の
もとに示した図である。
1……容器本体、2……容器蓋、5……隔膜、
6……正極、8……正極集電体、9……電解液、
10……負極、11……空間部、12……熱収縮
性絶縁チユーブ。
Fig. 1 shows the cross-sectional structure of a galvanic cell type oxygen sensor according to an embodiment of the present invention, and Fig. 2 shows the oxygen concentration-output characteristics of the galvanic cell type oxygen sensor A of the present invention compared to that of the conventional product B. FIG. 3 is a diagram showing the change over time of the galvanic cell type oxygen sensor A of the present invention in comparison with that of the conventional product B. 1... Container body, 2... Container lid, 5... Diaphragm,
6... Positive electrode, 8... Positive electrode current collector, 9... Electrolyte,
10...Negative electrode, 11...Space, 12...Heat-shrinkable insulating tube.
Claims (1)
らなる負極と電解液と隔膜と容器とから構成さ
れ、容器の内部に一部空間部を有するガルバニ電
池式酸素センサーにおいて、正極集電体の容器内
に位置する部分を合成樹脂もしくは天然樹脂によ
つて絶縁被覆してなることを特徴とするガルバニ
電池式酸素センサー。 In a galvanic cell type oxygen sensor, which is composed of a positive electrode consisting of a catalytic electrode for electrolytic reduction of oxygen, a negative electrode consisting of lead, an electrolytic solution, a diaphragm, and a container, and which has a partial space inside the container, the container of the positive electrode current collector A galvanic cell type oxygen sensor characterized by having an insulating coating on the inner part with synthetic resin or natural resin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18544084U JPH0321483Y2 (en) | 1984-12-05 | 1984-12-05 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18544084U JPH0321483Y2 (en) | 1984-12-05 | 1984-12-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6199049U JPS6199049U (en) | 1986-06-25 |
JPH0321483Y2 true JPH0321483Y2 (en) | 1991-05-10 |
Family
ID=30742910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18544084U Expired JPH0321483Y2 (en) | 1984-12-05 | 1984-12-05 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0321483Y2 (en) |
-
1984
- 1984-12-05 JP JP18544084U patent/JPH0321483Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6199049U (en) | 1986-06-25 |
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