JPH0127864Y2 - - Google Patents
Info
- Publication number
- JPH0127864Y2 JPH0127864Y2 JP1984012257U JP1225784U JPH0127864Y2 JP H0127864 Y2 JPH0127864 Y2 JP H0127864Y2 JP 1984012257 U JP1984012257 U JP 1984012257U JP 1225784 U JP1225784 U JP 1225784U JP H0127864 Y2 JPH0127864 Y2 JP H0127864Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- detection element
- filter
- gas detection
- gas filter
- 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
- 239000007789 gas Substances 0.000 claims description 110
- 238000001514 detection method Methods 0.000 claims description 40
- 239000003463 adsorbent Substances 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 18
- 235000019441 ethanol Nutrition 0.000 description 16
- 230000000694 effects Effects 0.000 description 11
- 238000001179 sorption measurement Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 239000004917 carbon fiber Substances 0.000 description 4
- 238000003795 desorption Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000007084 catalytic combustion reaction Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Separation Of Gases By Adsorption (AREA)
- Emergency Alarm Devices (AREA)
Description
【考案の詳細な説明】
従来、家庭用或は工業用のガス漏れ警報器に使
用される可燃性ガス検出素子としては半導体式又
は接触燃焼式のものが広く普及しているが、アル
コール蒸気などの雑ガスの影響を防止するため一
般にこれらの雑ガス吸着用のガスフイルターが使
用されている。このガスフイルターのガス検知素
子に対する効果は第１図に示される如くである。[Detailed description of the invention] Traditionally, semiconductor or catalytic combustion type combustible gas detection elements have been widely used in household or industrial gas leak alarms, but alcohol vapor, etc. In order to prevent the influence of miscellaneous gases, gas filters for adsorbing these miscellaneous gases are generally used. The effect of this gas filter on the gas detection element is as shown in FIG.
即ち、第１図は半導体式のガス検知素子につい
てガスフイルター使用の場合ａと不使用の場合ｂ
とのエチルアルコール（C2H5OH）（以下単にア
ルコールと称する。）蒸気濃度とガス検知素子出
力との関係を表わした特性図で、ガスフイルター
使用のａの場合は不使用のｂの場合に比し大幅に
出力がカツトされ、アルコール蒸気による影響が
かなり改善されることが実証されている。 That is, Fig. 1 shows a case where a gas filter is used and a case b when a gas filter is not used for a semiconductor type gas detection element.
This is a characteristic diagram showing the relationship between ethyl alcohol (C 2 H 5 OH) (hereinafter simply referred to as alcohol) vapor concentration and gas detection element output. It has been demonstrated that the output is significantly reduced compared to the conventional method, and that the effects of alcohol vapor are significantly improved.
しかし、従来のガスフイルターはガス検知素子
の全体を包囲する構造のもの、或はガス検知素子
取付部の周囲を遮蔽し、その内部に吸着剤を封入
した構造のものであり、いずれも可燃性ガス検知
素子の全体をガスフイルターで包む構造となつて
いるため、一旦フイルター中の活性炭等に吸着さ
れたアルコール蒸気等の脱離が十分に行なわれ
ず、ガス検知素子周辺の雰囲気中に検知ガスが存
在しなくなつた後でも検知素子の出力が下らず、
ガス警報器が誤報を発生し易く、又、一旦吸着さ
れたアルコール蒸気等のガスの脱離が不十分であ
るため活性炭等の吸着剤の吸着効果が低下すると
いう欠点がある。 However, conventional gas filters have a structure that surrounds the entire gas detection element, or a structure that shields the area around the gas detection element mounting part and seals an adsorbent inside, both of which are flammable. Since the entire gas detection element is surrounded by a gas filter, alcohol vapor and other substances adsorbed by the activated carbon in the filter are not sufficiently desorbed, causing detection gas to enter the atmosphere around the gas detection element. Even after it ceases to exist, the output of the detection element does not decrease,
Gas alarms tend to generate false alarms, and the adsorption effect of adsorbents such as activated carbon is reduced due to insufficient desorption of gases such as alcohol vapor once adsorbed.
本考案は従来のガス検知素子用フイルターのか
かる欠点に着目してなされたもので、ガス検知素
子に対するアルコール蒸気等の雑ガスによる影響
を効果的に排除すると同時に、一旦吸着された雑
ガスの脱離が速く、警報器の誤報を生じさせるこ
とがなく、しかも常時安定した吸着効果を保持し
得るガス検知素子用のガスフイルターを提供する
ことを目的とする。 The present invention was developed by focusing on the drawbacks of conventional filters for gas detection elements.It effectively eliminates the influence of miscellaneous gases such as alcohol vapor on gas detection elements, and at the same time removes miscellaneous gases that have been adsorbed. It is an object of the present invention to provide a gas filter for a gas detection element that is quick to release, does not cause false alarm alarms, and can maintain a stable adsorption effect at all times.
以下に本考案のガスフイルターを実施例を示す
図面に基づいて説明する。 EMBODIMENT OF THE INVENTION The gas filter of this invention is demonstrated below based on the drawing which shows an Example.
第２図は本考案のガスフイルターＡをガス検知
素子Ｓに装着した状態を斜視図で示す。図におい
て本考案のガスフイルターＡは円筒形の金網１お
よび２を同心円状に配置し、金網１と金網２とを
環状の底板３上に支持させ、金網１と金網２との
間の空隙部に活性炭、シリカゲル等の可燃性検知
ガス以外の雑ガスを優先的に吸着する性質を有す
る吸着剤４を充填して構成される環状体からな
り、内側の円筒状金網１の内径は、ガスフイルタ
ーＡをガス検知素子Ｓの外周に接して装着し得る
径に形成される。又、本考案のガスフイルターＡ
をガス検知素子Ｓに装着した場合、ガス検知素子
Ｓの表面の約2/3がガスフイルターＡにより被覆
され、残り約1/3を占める部分即ち第２図の例の
場合先端部表面がガスフイルターＡより突出する
ように構成されることが望ましい。 FIG. 2 is a perspective view showing the state in which the gas filter A of the present invention is attached to the gas detection element S. In the figure, the gas filter A of the present invention has cylindrical wire meshes 1 and 2 arranged concentrically, wire mesh 1 and wire mesh 2 being supported on an annular bottom plate 3, and a gap between wire mesh 1 and wire mesh 2. The inner diameter of the inner cylindrical wire mesh 1 is the same as that of the gas filter. The diameter is such that A can be mounted in contact with the outer periphery of the gas sensing element S. Moreover, the gas filter A of the present invention
When attached to the gas detection element S, approximately 2/3 of the surface of the gas detection element S is covered by the gas filter A, and the remaining 1/3, that is, the tip surface in the case of the example in Fig. 2, is covered with gas. It is desirable that the filter be configured to protrude from the filter A.
第３図ａ〜ｅに本考案のガスフイルターの他の
実施例又はガス検知素子への装着例を夫々示し
た。 3a to 3e show other embodiments of the gas filter of the present invention or examples of mounting it on a gas detection element, respectively.
即ち、第３図ａは第２図と同様の構成からなる
ガスフイルターＡをガス検知素子Ｓの先端部に装
着した場合を示す。又、第３図ｂのガスフイルタ
ーＢは活性炭等の吸着剤微粒子をラテツクス樹脂
等を結合剤として第２図のガスフイルターＡと同
様の高さ及び内径寸法を有する吸着環状体５に成
形した例を示す。次に第３図ｃのガスフイルター
Ｃはアルコール蒸気等の吸着効果を有するトウ状
の炭素繊維６をガス検知素子Ｓの図示しない防護
用金網上に直接巻き付けて装着した例を示す。
又、第３図ｄのガスフイルターＤは第３図Ｃと同
様の炭素繊維のシート状成形物７を直接ガス検知
素子Ｓの図示しない防護金網上に巻き付けた例を
示している。更に第３図ｅのガスフイルターＥは
ガス検知素子Ｓ自体が２重構造の金網８で被覆さ
れている場合に、その２重構造の金網間にアルコ
ール蒸気等の吸着剤９を充填した例を示してい
る。上記第３図ｂ〜ｅに示すいずれの場合におい
てもガスフイルターはガス検知素子Ｓに接し、か
つガス検知素子Ｓの一部（図示の場合先端部）を
開放して装着される。 That is, FIG. 3a shows a case where a gas filter A having the same structure as that in FIG. 2 is attached to the tip of the gas detection element S. Gas filter B shown in FIG. 3b is an example in which fine adsorbent particles such as activated carbon are formed into an annular adsorption body 5 having the same height and inner diameter as gas filter A shown in FIG. 2 using latex resin or the like as a binder. shows. Next, the gas filter C shown in FIG. 3c is an example in which a tow-shaped carbon fiber 6 having the effect of adsorbing alcohol vapor etc. is directly wound around a protective wire mesh (not shown) of the gas detection element S.
Further, the gas filter D shown in FIG. 3d is an example in which a carbon fiber sheet-like molded product 7 similar to that shown in FIG. Furthermore, the gas filter E shown in FIG. 3e is an example in which the gas detection element S itself is covered with a double-layer wire mesh 8, and an adsorbent 9 such as alcohol vapor is filled between the double-layer wire meshes. It shows. In any of the cases shown in FIGS. 3b to 3e above, the gas filter is mounted in contact with the gas detection element S and with a part of the gas detection element S (the tip in the case shown) open.
第４図は従来のガスフイルターを用いてガス検
知素子の全面を被覆した場合a1と、本考案のガス
フイルターを装着したガス検知素子の場合ｃ及び
ガスフイルターを装着しないガス検知素子の場合
b1についてアルコール蒸気を注入し次いで排気し
た場合のガス検知素子出力の時間的変化を比較し
た特性図を示す。なお、この場合のガス検知素子
としては接触燃焼式のものを使用した。 Figure 4 shows a case in which the entire surface of the gas detection element is covered with a conventional gas filter (a 1 ), a case in which the gas detection element is equipped with the gas filter of the present invention (c), and a case in which the gas detection element is not equipped with a gas filter.
b A characteristic diagram comparing temporal changes in the output of the gas detection element when alcohol vapor is injected and then evacuated for 1 is shown. In this case, a catalytic combustion type gas detection element was used.
即ち、第４図から明らかなように本考案のガス
フイルターを使用した場合は、従来のガスフイル
ターに比しガス注入初期時においては出力の減少
が少なく、アルコール蒸気の吸着効果はやや劣る
が、排気後の時間経過に伴なう出力減少は従来の
ガスフイルター装着の場合、ガス（アルコール蒸
気）の脱離効果が悪いため殆どなく、何時までも
ガスの感知状態に保持されているのに対し、本考
案のガスフイルターを装着した場合には、排気後
の時間経過に伴なう出力減少が著しく、ガスフイ
ルター不使用の場合と同様迅速に元のガス注入前
の状態に戻すことができる。従つて、従来のガス
フイルターにおいてはガス注入が何回か繰返され
た場合ガス吸着効果が次第に低下するが、本考案
のガスフイルターにおいてはアルコール蒸気等の
ガスの脱離性が優れ、常に吸着剤の活性が保持さ
れることが判る。 That is, as is clear from Fig. 4, when the gas filter of the present invention is used, the output decreases less at the initial stage of gas injection than the conventional gas filter, and the alcohol vapor adsorption effect is slightly inferior; In contrast to conventional gas filters, which have a poor desorption effect on gas (alcohol vapor), the output decreases over time after exhausting, and the gas detection state is maintained indefinitely. When the gas filter of the present invention is installed, the output decreases significantly over time after evacuation, and the state before gas injection can be returned to the original state as quickly as when no gas filter is used. Therefore, in conventional gas filters, the gas adsorption effect gradually decreases when gas injection is repeated several times, but in the gas filter of the present invention, the ability to desorb gases such as alcohol vapor is excellent, and the adsorbent is constantly It can be seen that the activity of is maintained.
本考案のガスフイルターがかかる優れた特性を
発揮する理由は、アルコール蒸気等の雑ガス吸着
剤を２重金網、樹脂等を保持体として、或は吸着
剤それ自体にトウ状もしくはシート状に成形する
ことにより環状体に構成したから、吸着ガスの放
散が円滑に行なわれると共に加熱状態にあるガス
検知素子に接して装着することにより吸着剤のガ
ス検知素子に近接する部分は常時加熱されるため
吸着されたガスの脱離性は一層向上するものと考
えられる。 The reason why the gas filter of the present invention exhibits such excellent characteristics is that the adsorbent for miscellaneous gases such as alcohol vapor is used as a holder using a double wire mesh, resin, etc., or the adsorbent itself is formed into a tow or sheet shape. Since the adsorbent is configured into an annular body, the adsorbed gas can be dissipated smoothly, and by being attached in contact with the gas sensing element that is in a heated state, the part of the adsorbent that is close to the gas sensing element is constantly heated. It is considered that the desorption performance of the adsorbed gas is further improved.
以上詳細に説明したように、本考案のガスフイ
ルターによれば、吸着剤のアルコール蒸気等の雑
ガスに対する吸着効果はやや低下するが、一旦吸
着されたガスの脱離性が極めて優れているため、
アルコール蒸気等の雑ガスに対するガス検知素子
の出力がカツトされ、これらの雑ガスによるガス
警報器の誤報等のトラブルが回避される利点があ
る。又、本考案のガスフイルターの吸着剤は常時
加熱されているため吸着能力が一部減少するが、
反面吸着ガスの脱離性が向上して吸着剤の活性が
低下することなく安定化し、更にガスフイルター
の寿命が長期化する等の効果が得られる。又、本
考案のガスフイルターを環状体に形成したことに
より、ガス検知素子への装着が容易である等の利
点がある。 As explained in detail above, according to the gas filter of the present invention, although the adsorption effect of the adsorbent on miscellaneous gases such as alcohol vapor is slightly reduced, the desorption performance of the gas once adsorbed is extremely excellent. ,
This has the advantage that the output of the gas detection element for miscellaneous gases such as alcohol vapor is cut off, and troubles such as false alarms caused by gas alarms caused by these miscellaneous gases can be avoided. In addition, since the adsorbent of the gas filter of this invention is constantly heated, its adsorption capacity is partially reduced.
On the other hand, the desorbability of the adsorbed gas is improved, the activity of the adsorbent is stabilized without decreasing, and the life of the gas filter is further extended. Further, since the gas filter of the present invention is formed into an annular body, there are advantages such as ease of attachment to the gas detection element.
第１図はガスフイルターをガス検知素子に使用
した場合と使用しない場合とについてのエチルア
ルコール蒸気濃度とガス検知素子出力との関係を
表わす図、第２図は本考案のガスフイルターをガ
ス検知素子に装着した状態の斜視図、第３図ａは
本考案のガスフイルターのガス検知素子への装着
例、第３図ｂ〜ｅは本考案のガスフイルターの他
の実施例を示す斜視図である。又、第４図は従来
のガスフイルター及び本考案のガスフイルターを
装着した場合、並びにガスフイルター無装着の場
合についてガス検知素子出力の時間的変化を比較
した特性図を示す。
１，２……金網、４……吸着剤、５……吸着環
状体、６……トウ状炭素繊維、７……シート状炭
素繊維、８……２重金網、９……吸着剤。
Figure 1 is a diagram showing the relationship between ethyl alcohol vapor concentration and gas detection element output when a gas filter is used as a gas detection element and when it is not used. Figure 2 shows the relationship between the gas filter of the present invention and the gas detection element. FIG. 3a is a perspective view showing an example of the gas filter of the present invention being attached to a gas detection element, and FIGS. 3b to 3e are perspective views showing other embodiments of the gas filter of the present invention. . Further, FIG. 4 shows a characteristic diagram comparing temporal changes in the output of the gas detection element when a conventional gas filter and the gas filter of the present invention are installed, and when no gas filter is installed. DESCRIPTION OF SYMBOLS 1, 2... Wire mesh, 4... Adsorbent, 5... Adsorption annular body, 6... Tow-like carbon fiber, 7... Sheet-like carbon fiber, 8... Double wire mesh, 9... Adsorbent.
Claims (1)
吸着剤を、環状体で、かつガス検知素子の一部
が突出する幅に形成したことを特徴とするガス
検知素子用ガスフイルター。 (2) 環状体の内径がガス検知素子の外径にほぼ等
しく形成されることを特徴とする実用新案登録
請求の範囲第１項記載のガス検知素子用ガスフ
イルター。[Claims for Utility Model Registration] (1) An adsorbent capable of adsorbing miscellaneous gases other than flammable detection gases is formed into an annular body with a width such that a part of the gas detection element protrudes. Gas filter for gas detection element. (2) The gas filter for a gas detection element according to claim 1, wherein the annular body has an inner diameter substantially equal to an outer diameter of the gas detection element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1225784U JPS60124626U (en) | 1984-02-02 | 1984-02-02 | Gas filter for gas detection element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1225784U JPS60124626U (en) | 1984-02-02 | 1984-02-02 | Gas filter for gas detection element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60124626U JPS60124626U (en) | 1985-08-22 |
| JPH0127864Y2 true JPH0127864Y2 (en) | 1989-08-24 |
Family
ID=30495145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1225784U Granted JPS60124626U (en) | 1984-02-02 | 1984-02-02 | Gas filter for gas detection element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60124626U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5722544A (en) * | 1980-07-16 | 1982-02-05 | Matsushita Electric Ind Co Ltd | Sensing element |
-
1984
- 1984-02-02 JP JP1225784U patent/JPS60124626U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5722544A (en) * | 1980-07-16 | 1982-02-05 | Matsushita Electric Ind Co Ltd | Sensing element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60124626U (en) | 1985-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3105542B2 (en) | Device for maintaining a vacuum in a thermal insulation jacket and method of manufacturing the same | |
| US6638339B2 (en) | Air filter assembly for low temperature catalytic processes | |
| US8265330B2 (en) | Material for speaker device and speaker device using it | |
| US8205442B2 (en) | Low restriction hydrocarbon trap assembly | |
| JPS60235623A (en) | Filter apparatus and its production | |
| US4505727A (en) | Adsorbent cartridge | |
| JP2003021007A (en) | Canister | |
| JPH0127864Y2 (en) | ||
| JP5107216B2 (en) | Evaporative fuel processing equipment | |
| CN112595818A (en) | Enhanced gas detection sensor | |
| JP3087982B2 (en) | Gas sensor | |
| JPH08254515A (en) | Gas sensor | |
| JP2021102937A (en) | Fuel adsorption device and evaporated fuel treatment device using the same | |
| CA1179311A (en) | Getter and electrical switching system using such getter | |
| JP3549914B2 (en) | Liquid crystal injection method for manufacturing liquid crystal display panel | |
| JP4104100B2 (en) | Gas sensor | |
| JPH08159999A (en) | Contact combustion type combustible gas sensor | |
| JP3197401B2 (en) | Gas alarm | |
| JP3171733B2 (en) | Gas sensor | |
| JPH06249088A (en) | Canister | |
| JPS58124939A (en) | Gas sensor | |
| JPH084605A (en) | Evaporated fuel processing device | |
| JPH04184250A (en) | Carbon dioxide sensor | |
| JPH07159363A (en) | Gas sensor | |
| JPS5930222B2 (en) | Specific gas detection method |