JP4556390B2 - Volatile drug sustained release member and air conditioner using the same - Google Patents

Volatile drug sustained release member and air conditioner using the same Download PDF

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JP4556390B2
JP4556390B2 JP2003197147A JP2003197147A JP4556390B2 JP 4556390 B2 JP4556390 B2 JP 4556390B2 JP 2003197147 A JP2003197147 A JP 2003197147A JP 2003197147 A JP2003197147 A JP 2003197147A JP 4556390 B2 JP4556390 B2 JP 4556390B2
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Japan
Prior art keywords
volatile
volatile drug
film
drug
release member
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JP2003197147A
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JP2005034187A (en
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浩直 沼本
成広 佐藤
志保 古谷
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、揮散性薬剤を外部の湿度環境変化によって徐放させる揮散性薬剤徐放部材に関するものであり、季節の変動あるいはその場の雰囲気湿度環境が変化して、カビ、菌が繁殖することを防止したいような分野には広く適用可能である。たとえば浴室、更衣室、下駄箱、フードストッカー、物置、地下収納庫、またビル空調用の加湿用通路、換気用通路等にも適用可能である。特に空気調和機の室内機を冷房運転した後、常に清潔な状態に保つのに有効である。
【0002】
【従来の技術】
充填された揮散性薬剤を長期間にわたって徐放させるための技術は種々雑多と提案されてきている。一般的には多孔性の材料物質中に含浸させて毛細管現象によって徐々に揮散させる方法である。その多孔性物質とはゼオライト、シルカゲルのような無機化合物であったり、ポリプロピレン、ポリエステル、セルロースの発泡体あるいは繊維束であったりしていた。さらにシクロデキストリンと呼ばれる有機物の小さな孔に包接させて徐放させるような方法もある(例えば特許文献1、2参照)。またマイクロカプセル化して徐放性を具現化する方法もある(例えば特許文献3、4参照)。
【0003】
これら揮散性薬剤に対して薬剤の揮散終了をインジケートする方法としては一般的に薬剤自体の重量変化量を検知するのではなく、リファレンスとして時間経過で色変化するものを追加添付してそれを利用者が識別することで薬剤の終了と告知している。この方法はよくピレスロイド系の防虫忌避剤の分野で採用されている。
【0004】
しかしながら、揮散性薬剤の重量変化量を管理しているわけではないので、使用環境によってはまだ薬剤が残存しているのに揮散性薬剤の終了をインジケートする場合も発生するという課題を有していた。
【0005】
これら従来の方式は揮散性薬剤の残量そのものを管理して薬剤の終了をインジケートしていなかったので、本発明者らは使用環境によって薬剤の残量が変化した場合にも揮散性薬剤の残量を二次的に管理することで正確に薬剤の終了を告知できる方法を提案してきた。
【0006】
【特許文献1】
特開平5−176733号公報
【特許文献2】
特開平6−40890号公報
【特許文献3】
特開平6−9377号公報
【特許文献4】
特開平6−65064号公報
【0007】
【発明が解決しようとする課題】
しかしながら、上記従来の構成では、揮散性薬剤が揮散性薬剤徐放部材から放出され、薬剤の残量がどのくらいであるのか、利用者は独自に判断することができなかった。そのため揮散性薬剤徐放部材を非透過性フィルムで包装された状態から開封して使用を開始した時の日付を記録しておき、所定の期間が過ぎたら交換するという方法しかなかった。そのため利用環境の違いによって仮に揮散性薬剤徐放部材内部に揮散性薬剤がまだ十分に残っていても揮散性薬剤徐放部材としての品質を保証するためには新品のものと交換してもらわなければならない。そのため揮散性薬剤徐放部材内部に揮散性薬剤がまだ十分に残っていることを確認できれば、利用者の判断で使用期間を延長して使用することができていたにもかかわらず、交換するという無駄を生じていた。
【0008】
本発明は、このような従来の課題に対して、利用者が簡単に独自の判断で揮散性薬剤徐放部材内部の揮散性薬剤残量を確認できる揮散性薬剤徐放部材とそれを利用した空気調和機を提供するものである。
【0009】
【課題を解決するための手段】
本発明の揮散性薬剤徐放部材は、揮散性薬剤A及び揮散性薬剤Bとをそれぞれ揮散量を制御する揮散量制御膜内部に配置するとともに、この揮散量制御膜内部に配置した揮散性薬剤A及び揮散性薬剤Bとを容器内に設け、前記容器の開口を湿度変化によって前記揮散性薬剤Aと前記揮散性薬剤Bとの透過量が変化する湿度感受性膜によって覆うことにより、前記揮散量制御膜と前記湿度感受性膜の間に揮散した前記揮散性薬剤Aと前記揮散性薬剤Bの蒸気が滞留するための空間部を設け、前記空間部に揮散する常温での蒸気圧は前記揮散性薬剤Aよりも前記揮散性薬剤Bのほうが低く、前記揮散性薬剤Aと前記揮散性薬剤Bとが揮散して前記揮散量制御膜と前記湿度感受性膜とで形成された前記空間部で一定の蒸気濃度以下に保たれながら、外部の湿度環境変化に応じて前記空間部に滞留している揮散性薬剤Aが前記湿度感受性膜から外部へ優先的に徐放され、揮散性薬剤Aが一定量以下になった時、揮散性薬剤Bが外部へと徐放され、利用者が揮散性薬剤Bの臭気を感じることによって揮散性薬剤Aの残量が一定量以下になったことを検知できることを特徴とする。
【0010】
【発明の実施の形態】
第1の発明の実施の形態における揮散性薬剤徐放部材とそれを用いた空気調和機は、揮散性薬剤A及び揮散性薬剤Bとをそれぞれ揮散量を制御する揮散量制御膜内部に配置するとともに、この揮散量制御膜内部に配置した揮散性薬剤A及び揮散性薬剤Bとを容器内に設け、前記容器の開口を湿度変化によって前記揮散性薬剤Aと前記揮散性薬剤Bとの透過量が変化する湿度感受性膜によって覆うことにより、前記揮散量制御膜と前記湿度感受性膜の間に揮散した前記揮散性薬剤Aと前記揮散性薬剤Bの蒸気が滞留するための空間部を設け、前記空間部に揮散する常温での蒸気圧は前記揮散性薬剤Aよりも前記揮散性薬剤Bのほうが低く、前記揮散性薬剤Aと前記揮散性薬剤Bとが揮散して前記揮散量制御膜と前記湿度感受性膜とで形成された前記空間部で一定の蒸気濃度以下に保たれながら、外部の湿度環境変化に応じて前記空間部に滞留している揮散性薬剤Aが前記湿度感受性膜から外部へ優先的に徐放され、揮散性薬剤Aが一定量以下になった時、揮散性薬剤Bが外部へと徐放され、利用者が揮散性薬剤Bの臭気を感じることによって揮散性薬剤Aの残量が一定量以下になったことを検知できる。前記構成により、常温での蒸気圧は揮散性薬剤Aよりも揮散性薬剤Bのほうが低いので、揮散性薬剤Aが揮散性薬剤Bよりも揮散性薬剤徐放部材の湿度感受性膜から外部へ優先的に徐放される。しかし揮散性薬剤Aが一定量以下になると蒸気圧が低下してくるため、今度は揮散性薬剤Bだけが外部へと徐放され始める。その結果利用者は今まで感じなかった揮散性薬剤Bの臭気を感ずることによって、揮散性薬剤Aの残量が一定量以下になったことを容易に識別判断できる。
【0012】
第2の発明の実施の形態における揮散性薬剤徐放部材とそれを用いた空気調和機は、揮散性薬剤徐放部材からの揮散性薬剤Aの放出量が、人間がにおいを感じるレベルの残留濃度閾値以下であり、揮散性薬剤Aの残量が一定量以下になった時放出される、揮散性薬剤Bからの放出量が、人間がにおいを感じるレベルの残留濃度閾値以上である。これによって揮散性薬剤Aの揮散性薬剤徐放部材からの放出量が、人間がにおいを感じるレベルの残留濃度閾値以下であるため、利用者は薬剤Aの臭気による不快感はなく、薬剤Aによる効用を受けることができる。また、単独では揮散性薬剤Bの揮散性薬剤徐放部材からの放出量が閾値以上であるため、揮散性薬剤Aの残量が一定量以下になった時には揮散性薬剤Bの揮散性薬剤徐放部材からの放出によって利用者は揮散性薬剤Bの臭気を感じて揮散性薬剤Aの残量が一定量以下になったことを容易に判断できる。
【0013】
の発明の実施の形態における揮散性薬剤徐放部材とそれを用いた空気調和機は、揮散量制御膜内部に配置された揮散性薬剤Aと揮散量制御膜内部に配置された揮散性薬剤Bとが個別に湿度感受性膜で覆った容器内部に配置されている。これによって揮散性薬剤Aと揮散性薬剤Bとを個別に揮散量制御膜内に分包するので揮散性薬剤Aと揮散性薬剤Bとが相溶性を有するもの同士であっても蒸気圧特性に影響を及ぼさず、揮散性薬剤Aと揮散性薬剤Bとが個別の蒸気圧特性で空間部に滞留した状態とすることができる。その結果湿度感受性膜から揮散性薬剤Aが優先的に徐放された後にまだ残存している揮散性薬剤Bが徐放することによって利用者は揮散性薬剤Bの臭気を感じとることができる。
【0014】
の発明の実施の形態における揮散性薬剤徐放部材とそれを用いた空気調和機は、揮散性薬剤Aがアリルイソチオシアネートであり、揮散性薬剤Bがl−メントールまたはd−リモネンである。最初は蒸気圧が高いアリルイソチオシアネートが優先的に放出されるが、アリルイソチオシアネートの残量が一定量以下になるとl−メントールまたはd−リモネンだけが放出されることによって、l−メントールまたはd−リモネンの臭気を利用者が感じ取ってアリルイソチオシアネートの残量が一定量以下になったことを識別判断できる。
【0015】
の発明の実施の形態における揮散性薬剤徐放部材とそれを用いた空気調和機は、薬
剤の揮散量を制御する膜がポリエチレンフィルム、ポリプロピレンフィルム、ポリエチレンテレフタレートフィルムまたはそれらの複合ラミネートフィルムである。液体の薬剤の揮散量を制御する一次制御膜としてポリエチレンフィルム、ポリプロピレンフィルム、ポリエチレンテレフタレートフィルムまたはそれらの複合ラミネートフィルムを使用することで十分な徐放効果を得ることができる。
【0016】
の発明の実施の形態における揮散性薬剤徐放部材とそれを用いた空気調和機は、湿度感受性膜が表面にビスコース加工紙を含んでなるラミネート構造である。ビスコース加工紙を含んでなるラミネート構造である湿度感受性膜を使用することで湿度に対して鋭敏な湿度感受性の膜を提供できる。
【0017】
の発明の実施の形態における空気調和機は、揮散性薬剤徐放部材の湿度感受性膜面を熱交換器の上流側面と向い合わせとなるように配置した。揮散性薬剤徐放部材の湿度感受性膜面を熱交換器側に向けることによって、熱交換器側からの湿度上昇を迅速に感じて、薬剤の徐放応答性を向上させることができる。
【0018】
【実施例】
以下本発明の実施例について図面を参照しながら説明する。
【0019】
(実施例1)
図1は本実施例を示す揮散性薬剤徐放部材の正面外観図であり、図2は揮散性薬剤徐放部材の側面断面構成図である。
【0020】
1はキャストポリプロピレン(CPP) 370μm/エチレンビニルアルコール共重合ポリマー(EVOH) 60μm/CPP 370μmの共押し出しシート、厚み0.8mmを真空成形して作製した容器であり、内寸法は50×170×10mmである。2は揮散性薬剤Aとなるアリルイソチオシアネート15gとセルロースエチルエーテルを重量比8:1で混合することによって粘度15000cps程度に増粘化させた後、炭酸カルシウム粉末の槽に移してダンゴ状態とした。3はアリルイソチオシアネートの揮散制御膜となるラミネートフィルムのピロー包装体であり、一次制御膜となり、ダンゴ状態となったアリルイソチオシアネート2を延伸ポリプロピレン(OPP) 30μmとポリエチレン(LDPE) 70μmとのラミネートフィルムに対してLDPE側をヒートシールにてピロー包装化したものである。4は揮散性薬剤Bとなるd−リモネン10gとセルロースエチルエーテルを重量比4:1で混合することによって粘度80000cps程度に増粘化させた後、二酸化チタン粉末の槽に移してダンゴ状態とした。5はd−リモネンの揮散制御膜となるラミネートフィルムのピロー包装体であり、一次制御膜となり、ダンゴ状態となったd−リモネン4を延伸ポリプロピレン(OPP) 30μmとポリエチレン(LDPE) 70μmとのラミネートフィルムに対してLDPE側をヒートシールにてピロー包装化したものである。6はビスコース加工紙を表面上に配設した湿度感受性膜であり、二次制御膜となる。湿度感受性膜6はCPPフィルム 30μm/LDPEフィルム 15μm上にレーヨン/パルプ不織布を介してビスコース膜を7g/mの塗布量で形成させたものを使用した。湿度感受性膜6は外周部、5mm巾で容器1にPP側をヒートシールで溶着接合されている。7はピロー包装体3とピロー包装体5と湿度感受性膜6とで形成される空間部であり、その空間内容積は35mlである。ラミネートフィルムのピロー包装体3とピロー包装体5は容器1の内面底部にLDPEをホットメルト(図示せず)することによって位置固定を行った。
【0021】
揮散したアリルイソチオシアネート蒸気とd−リモネン蒸気はラミネートフィルム3とラミネートフィルム5で揮散量を抑制されながら、空間部7へと至り、二次制御膜となる湿度感受性膜6に対する薬剤透過量はラミネートフィルムよりも小さいのである程度高濃度の薬剤が滞留する状態となる。この時アリルイソチオシアネートとd−リモネンを比較した場合、たとえば25℃においてアリルイソチオシアネートの蒸気圧は約5mmHgであり、d−リモネンの蒸気圧は約2mmHgであるため、空間部7ではアリルイソチオシアネートが優先的に揮散滞留することになる。湿度感受性膜6によって低湿度の場合にはアリルイソチオシアネート蒸気およびd−リモネン蒸気は、分圧の和が飽和蒸気圧となる濃度に近い状態のままで空間部7にずっと維持される。しかし湿度が高くなるとアリルイソチオシアネート蒸気およびd−リモネン蒸気が湿度感受性膜6を通過して外部へと放出されやすくなる。湿度感受性膜6は湿度変化によって膜組織が膨潤し、緩んだ構造となり、アリルイソチオシアネート分子およびd−リモネン分子が透過して外部へと放出されやすくなる。この放出量分を補充するためにアリルイソチオシアネート蒸気およびd−リモネン蒸気がさらにラミネートフィルム3と5を通過して空間部7へと揮散する。このような構成の揮散性薬剤徐放部材によって、30℃、相対湿度95%条件にて湿度感受性膜からアリルイソチオシアネートを100mg/日レベルで継続して放出させ、気相防かび効果を提供することが可能となった。また揮散性薬剤徐放部材からの薬剤放出特性はアリルイソチオシアネートの残量が初期に対して10wt%以下になるまでほとんど変化することがなかった。
【0022】
図3に実施例1で得られた揮散性薬剤徐放部材のアリルイソチオシアネートおよびd−リモネンの放出特性を示した。アリルイソチオシアネートの残量が低減してき、放出量が低下してくると空間部でのアリルイソチオシアネート分圧が減少するのでd−リモネンの揮散、放出が強調されるようになるので利用者はd−リモネンの臭気を感じて、結果としてアリルイソチオシアネートの残量が少なくなってきたことを認識可能となる。
【0023】
次に空気調和機の室内機に本実施例による揮散性薬剤徐放部材を使用した場合について説明する。
【0024】
図4は、本実施例を示す空気調和機の室内機断面構成図である。吸い込みグリル8、9を通じて室内空気を吸い込み、吸い込んだ空気は熱交換器10、11によって冷却、除湿された後、クロスフローファン12によって吸い込み送風されながら、最終吹出し口13から室内空間に冷風を提供する。吹出し口13には上下偏向羽根14が配設され、室内空間への吹出し方向をコントロールしている。この時、熱交換器10、11によって除湿された結露水は熱交換器アルミニウムフィンをつたって、ドレンパン部15、16へと至る。ドレンパン部15は室内機台枠17に一体物として構成され、ドレンパン部16は吹出しグリル18に一体物として構成される。ドレンパン部15に溜まった結露水は台枠17を介してドレンパン部16側に流れて水受けされ、最終的にはドレン口(図示せず)を経由して外部へと排出される。熱交換器10、11のアルミニウムフィンには熱交換性能の高効率化を図るため、縦スリットが設けられた構造を有している。そのために結露した水はスリット部で表面張力によって水膜を形成して、ドレンパン部15、16へとすぐには滴下し難い構造のため、アルミニウムフィンが乾くスピードが遅くなってしまう。たとえば25℃、相対湿度90%の環境雰囲気では、熱交換器アルミニウムフィンが乾くのに数十時間を要してしまい、なかなか乾燥しない。この時室内機空間、特に熱交換器10、11で構成される送風回路内部は相対湿度95%以上の雰囲気に曝され、カビが非常に繁殖しやすい環境条件となっている。19は揮散性薬剤徐放部材であり、熱交換器11に近接した下部上流側に配置され、揮散性薬剤徐放部材19の湿度感受性膜6側が熱交換器に向かい合う構成とした。このことによって冷房、除湿運転停止後、上下偏向羽根14が閉状態になるとともに、高湿度状態となった空気が室内機全体に充満して湿度感受性膜6に達すると、揮散性薬剤徐放部材19の内部からアリルイソチオシアネート1が熱交換器11側へ拡散し、アルミニウムフィン間を通過しながら、上下偏向羽根14が閉状態となっているので熱交換器10、11で構成された空間部等へと徐々に拡散、堆積して充満する。この結果室内機内部は熱交換器10、11で構成された空間底部で3〜5ppm程度、上部低濃度の空間でも1ppm以上のアリルイソチオシアネート蒸気を滞留させることが可能となる。揮散性薬剤徐放部材19の空間部7に滞留している高濃度のアリルイソチオシアネート蒸気が湿度感受性膜7を透過して500〜5000倍の空間へと拡散していく構成である。アリルイソチオシアネートの閾値は10ppm程度であるので匂いを感じないレベルの滞留濃度である。これによって室内空間に存在するCladosporium、Alternaria、Aspergillus、Penicillium、Rhizopusと言った一般的なカビには十分な防カビ効果を得ることができた。防カビの効果を得るためには室内機へのアリルイソチオシアネート蒸気を0.5ppm以上にすることが望ましく、人間の閾値である10ppm以下にすることが実用上望ましい。
【0025】
本実施例で使用したセルロースエチルエーテルは精製パルプを原料として苛性ソーダにてアルカリセルロース化された後、エチルクロライドを反応させてグルコース内の水酸基をエトキシル基に置換したものであり、化学反応式を(化1)に示した。外観は白色の粉末であり、ほとんど無臭に近い特性を有している。セルロースエチルエーテルで薬剤を固形化または増粘化させるためには重量平均分子量に依存し、具体的には10万以上のものが好ましかった。またアリルイソチオシアネートあるいはd−リモネンとセルロースエチルエーテルとの重量比を2:1にすることで固形化でき、重量比が大きくなるにしたがって徐々に低粘度化し、10:1よりも小さいと揮散性薬剤の原液に対してそれほど増粘しているとは言えない。したがって液体の揮散性薬剤を固形化または増粘化させるためにはセルロースエチルエーテルとの重量比は2:1〜10:1が好ましいと言える。
【0026】
【化1】

Figure 0004556390
【0027】
(実施例2)
図5に本実施例を示す揮散性薬剤徐放部材の正面外観図であり、図6は揮散性薬剤徐放部材a−a´線での側面断面構成図である。20は揮散性薬剤Aとなるアリルイソチオシアネートを吸収して膨潤したポリウレタン連続多孔質体である。具体的には35×35×10のポリウレタン連続多孔質体、かさ密度0.35g/ml、平均気孔径30μm、気孔率70%にアリルイソチオシアネート20gを吸収させて約50×50×14に膨潤した。21はポリウレタン連続多孔質体20の外装となるラミネートシートのピロー包装体であり、ポリプロピレン 30μmとポリエチレン 70μmとのラミネートシートに対してポリエチレン側をヒートシールにてピロー包装化したものであり、一次制御膜となる。22は揮散性薬剤Bとなるl−メントールの結晶粒であり、23は外装となるラミネートシートのピロー包装体であり、ポリプロピレン 30μmとポリエチレン 70μmとのラミネートシートに対してポリエチレン側をヒートシールにてピロー包装化したものであり、一次制御膜となる。24はそれを充填するための半透明なポリプロピレン、厚み2mmからなる容器であり、射出成形で加工した。容器の内寸法は55×55×35mmである。本体容器24内部に下側がl−メントールのピロー包装体23、上側がアリルイソチオシアネートのピロー包装体21となるように配置されている。25は本体容器24に対する蓋であり、これも半透明なポリプロピレン、厚み2mmからなる。蓋25の中央部に大きな窓を有し、長手方向の渡しとなるように2ヶ所にリブ26が形成され、蓋25の表面側中央部には30×30mmの湿度感受性膜27が配置され、リブ26によってピロー包装体21と23の容器内部での位置固定と湿度感受性膜27に対する補強の役目を果たしている。湿度感受性膜27はビスコース加工紙を延伸ポリプロピレン 30μm/ポリエチレン 40μm上にレーヨン/パルプ不織布を介してビスコース膜を7g/mの塗布量で形成させたラミネート構造のものを使用し、湿度感受性膜27の外周部は蓋25にポリプロピレン側をヒートシールで溶着接合されている。ヒートシール巾は3mmである。本体容器24と蓋25は超音波接合によって接合されている。28はピロー包装体21と23と本体容器24と蓋25とで形成される空間部であり、その空間容積は約15mlである。
【0028】
ポリウレタン連続多孔質体20から揮散したアリルイソチオシアネートはピロー包装体21で揮散量を抑制されながら、空間部28で滞留しながら、湿度感受性膜27によって低湿度の場合にはアリルイソチオシアネートの外部への蒸気放出がある程度抑制されるが、湿度が高くなるとアリルイソチオシアネート蒸気が湿度感受性膜27を通過して外部へと放出されやすくなる。揮散性薬剤徐放部材の内部にアリルイソチオシアネートが十分残存する間は蒸気圧の低いl−メントールの徐放量が抑制されるが、アリルイソチオシアネートの残量が一定以下になると空間部でのアリルイソチオシアネート分圧が減少するのでl−メントールの揮散量も増大してき、利用者はl−メントールの臭気を感じとることによってアリルイソチオシアネートの残量が少なくなったことを識別、判断できた。図7に実施例2で得られた揮散性薬剤徐放部材のアリルイソチオシアネートおよびl−メントールの放出特性を示した。
【0029】
本実施例で得られた揮散性薬剤徐放部材は内容積150リットルのシューズボックスに適用して革靴等にかびを発生させることなく、十分な機能を得ることができた。
【0030】
実施例では、薬剤を充填する容器として多層ラミネートシートあるいは半透明なポリプロピレン樹脂を使用したが、本発明で使用できるものはこの限りではない。この他に充填する薬剤との耐薬品性を鑑みて問題のない材料を選択すればよい。この他、ポリエチレンテレフタレート樹脂、ポリカーボネート樹脂、ポリエチレンナフタレート樹脂、ポリエチレン樹脂、メチルペンテン樹脂等が使用できる。
【0031】
実施例では、液体の揮散性薬剤をセルロースエチルエーテルで増粘化させてピロー包装体に収納したり、ポリウレタン連続多孔質体に吸収させてピロー包装体に収納したりして使用したが、液体の揮散性薬剤を直接ピロー包装体に収納のは難しいので、ある程度ハンドリング性を良くしてピロー包装体に収納して供することが好ましい。液体の揮散性薬剤を増粘化させるものとして(化2)に示すようなポリビニルブチラールを使用することもできる。l−メントールのように常温で固体結晶のものはそのまま一次制御膜内にピロー包装化すればよい。
【0032】
【化2】
Figure 0004556390
【0033】
実施例では、薬剤の揮散量を制御する一次制御膜としてポリプロピレンとポリエチエンの複合ラミネートフィルムを使用したが、本発明で使用できるものはこの限りではない。その他にポリエチレンフィルム、ポリプロピレンフィルム、ポリウレタンフィルムを単独もしくは複合してラミネート構造のフィルムとして使用することもできる。また一次制御膜は内部に充填する揮散性薬剤の透過量を考慮しながら、用途に合わせて選択することが好ましい。
【0034】
実施例では、湿度感受性膜として表面にビスコース加工紙を含んでなるラミネート構造を使用したが、ビスコース加工紙は低湿度条件では非常にリジッドな膜構造となっているのに対して、多湿条件下でビスコースが膨潤して緩んだ構造と変化するため、内部から揮散性薬剤が透過しやすくなる。したがって湿度感受性膜として優れた特性を有していた。
【0035】
実施例では、揮散性薬剤Aとしてアリルイソチオシアネートを使用し、揮散性薬剤Bとしてl−メントールまたはd−リモネンを使用したが、本発明で使用できるものはこの限りではない。常温での蒸気圧が揮散性薬剤Aよりも揮散性薬剤Bのほうが低い構成であればよく、また揮散性薬剤Bだけの徐放特性によって利用者が揮散性薬剤Bを認識できることが好ましい。揮散性薬剤徐放部材の空間部で揮散性薬剤Aと揮散性薬剤Bを滞留させ、必要に応じて揮散性薬剤Aと揮散性薬剤Bが徐放されるが、先に揮散性薬剤Aがなくなってしまうためにその後揮散性薬剤Bの揮散量が増大して利用者が揮散性薬剤Bを認識できるようになる。アリルイソチオシアネートは低濃度の揮散量にて抗菌、防カビ効果が得られるような薬剤であり、応用範囲が広いのでアリルイソチオシアネートの残量インジケート機能として本発明の揮散性薬剤徐放部材構成を有効に活用可能であった。
【0036】
実施例では、揮散性薬剤Aと揮散性薬剤Bは別々に分包する形態としたが、揮散性薬剤Aの残存量低下から揮散性薬剤Bの揮散量増大へとスムーズに移行させるためには揮散性薬剤同士が共沸混合の影響を受けないように揮散性薬剤Aと揮散性薬剤Bは個別にピロー包装化とすることが好ましい。
【0037】
実施例では、一般的なセパレート型空気調和機の室内機への適用、シューズボックスへの適用について説明したが、本発明による揮散性薬剤徐放部材の用途はこれに限られるものではない。季節の変動あるいはその場の雰囲気湿度環境が変化して、カビ、菌が繁殖することを防止したいような分野には広く利用できる。たとえば浴室、更衣室、フードストッカー、物置、地下収納庫等に使用できる。またビル空調用の加湿用通路、換気用通路等にも応用可能である。
【0038】
【発明の効果】
上記実施例から明らかなように、常温での蒸気圧は揮散性薬剤Aよりも揮散性薬剤Bのほうが低いので、揮散性薬剤Aが揮散性薬剤Bよりも揮散性薬剤徐放部材の湿度感受性膜から外部へ優先的に徐放される。しかし揮散性薬剤Aが一定量以下になると蒸気圧が低下してくるため、今度は揮散性薬剤Bが外部へと徐放され始める。その結果利用者は今まで感じなかった揮散性薬剤Bの臭気を感ずることによって、揮散性薬剤Aの残量が一定量以下になったことを容易に判断できた。揮散性薬剤Aの揮散性薬剤徐放部材からの放出量が閾値以下であるため、利用者は薬剤Aの臭気による不快感なく、薬剤Aによる効用を受けることができる。また、単独では揮散性薬剤Bの揮散性薬剤徐放部材からの放出量が閾値以上であるため、揮散性薬剤Aの残量が一定量以下になった時には揮散性薬剤Bの揮散性薬剤徐放部材からの放出によって利用者は揮散性薬剤Bの臭気を感じて揮散性薬剤Aの残量が一定量以下になったことを容易に判断できた。揮散性薬剤Aと揮散性薬剤Bとを個別に揮散量制御膜内に分包することで揮散性薬剤Aと揮散性薬剤Bとが相溶性を有するもの同士であっても蒸気圧特性に影響を及ぼさず、揮散性薬剤Aと揮散性薬剤Bとが個別の蒸気圧特性で揮散することができた。揮散性薬剤Aがアリルイソチオシアネートであり、揮散性薬剤Bがl−メントールまたはd−リモネンであることによって最初はアリルイソチオシアネートが優先的に放出され、アリルイソチオシアネートの残量が一定量以下になるとl−メントールまたはd−リモネンが放出されることによってl−メントールまたはd−リモネンの臭気を利用者が感じてアリルイソチオシアネートの残量が一定量以下になったことを判断できた。
【図面の簡単な説明】
【図1】実施例1の揮散性薬剤徐放部材の正面外観図
【図2】実施例1の揮散性薬剤徐放部材の側面断面構成図
【図3】実施例1で得られた揮散性薬剤徐放部材のアリルイソチオシアネートとd−リモネンの放出特性グラフ
【図4】実施例1の空気調和機の室内機断面構成図
【図5】実施例2の揮散性薬剤徐放部材の正面外観図
【図6】実施例2の揮散性薬剤徐放部材の側面断面構成図
【図7】実施例2で得られた揮散性薬剤徐放部材のアリルイソチオシアネートとl−メントールの放出特性グラフ
【符号の説明】
2 アリルイソシアネート
3、5、21、23 ピロー包装体(ラミネートフィルム)
4 d−リモネン
6、27 湿度感受性膜
7、28 空間部
10、11 熱交換器
19 揮散性薬剤徐放部材
20 ポリウレタン連続多孔質体
22 l−メントール[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a volatile drug sustained-release member that releases a volatile drug in response to external humidity environment changes, and changes in the season or the atmospheric humidity environment on the spot may cause mold and fungi to propagate. It can be widely applied to the field where it is desired to prevent the occurrence of the problem. For example, the present invention can be applied to a bathroom, a changing room, a shoebox, a food stocker, a storeroom, an underground storage, a humidifying passage for building air conditioning, and a ventilation passage. In particular, it is effective to keep the indoor unit of the air conditioner always clean after the cooling operation.
[0002]
[Prior art]
Various techniques have been proposed for gradually releasing the filled volatile drug over a long period of time. In general, it is a method in which a porous material is impregnated and gradually volatilized by capillary action. The porous material was an inorganic compound such as zeolite or silica gel, or a foam or fiber bundle of polypropylene, polyester or cellulose. In addition, there is a method in which a small hole of an organic substance called cyclodextrin is included and sustainedly released (for example, see Patent Documents 1 and 2). There is also a method for realizing sustained release by microencapsulation (see, for example, Patent Documents 3 and 4).
[0003]
As a method to indicate the end of volatilization of these volatile drugs, it is generally not necessary to detect the amount of change in the weight of the drug itself, but to add a color change over time as a reference. The person is informed that the drug has ended. This method is often employed in the field of pyrethroid insect repellents.
[0004]
However, since the amount of change in weight of the volatile drug is not managed, depending on the use environment, there is a problem that the end of the volatile drug may be indicated even though the drug still remains. It was.
[0005]
Since these conventional methods did not indicate the end of the drug by managing the remaining amount of the volatile drug itself, the present inventors remained the remaining volatile drug even when the remaining amount of the drug changed depending on the use environment. We have proposed a method that can accurately notify the end of the drug by controlling the amount secondarily.
[0006]
[Patent Document 1]
JP-A-5-176733
[Patent Document 2]
JP-A-6-40890
[Patent Document 3]
JP-A-6-9377
[Patent Document 4]
JP-A-6-65064
[0007]
[Problems to be solved by the invention]
However, in the above conventional configuration, the volatile drug is released from the volatile drug sustained-release member, and the user cannot independently determine how much of the drug is remaining. Therefore, there was only a method in which the date when the volatile drug sustained-release member was opened from the state of being packaged with the non-permeable film and started to be used was recorded and replaced when a predetermined period passed. Therefore, even if there is still enough volatile drug inside the volatile drug sustained-release member due to the difference in usage environment, it must be replaced with a new one to guarantee the quality as a volatile drug sustained-release member. I must. Therefore, if it can be confirmed that there is still enough volatile drug inside the volatile drug sustained-release member, it will be replaced even though it can be used for an extended period of use at the user's discretion. It was a waste.
[0008]
The present invention uses a volatile drug sustained-release member that allows a user to easily check the remaining volatile drug residual amount inside the volatile drug sustained-release member based on such a conventional problem. An air conditioner is provided.
[0009]
[Means for Solving the Problems]
The volatile drug sustained-release member of the present invention is a volatile drug A. as well as Volatile drug B The volatilizing agent A and the volatilizing agent B arranged inside the volatilization amount control film are disposed inside the volatilization amount control film for controlling the volatilization amount, respectively, and the opening of the container is changed by changing the humidity. The volatile drug A and the volatile drug volatilized between the volatilization amount control film and the humidity sensitive film by covering with a humidity sensitive film in which the permeation amount of the volatile drug A and the volatile drug B changes. A space for allowing the vapor of B to stay is provided, and the vapor pressure at room temperature that volatilizes in the space is lower in the volatile drug B than in the volatile drug A, and the volatile drug A and the volatile While the medicine B is volatilized and kept at a certain vapor concentration or less in the space formed by the volatilization amount control film and the humidity sensitive film, When the volatile drug A staying in the space is preferentially released from the humidity-sensitive membrane to the outside according to changes in the external humidity environment, and the volatile drug A becomes a certain amount or less, it is volatile. It is possible to detect that the remaining amount of the volatile drug A has become a certain amount or less when the drug B is gradually released to the outside and the user feels the odor of the volatile drug B.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Volatile drug sustained release member according to the embodiment of the first invention And air conditioner using it Volatile drug A as well as Volatile drug B The volatilizing agent A and the volatilizing agent B arranged inside the volatilization amount control film are disposed inside the volatilization amount control film for controlling the volatilization amount, respectively, and the opening of the container is changed by changing the humidity. The volatile drug A and the volatile drug volatilized between the volatilization amount control film and the humidity sensitive film by covering with a humidity sensitive film in which the permeation amount of the volatile drug A and the volatile drug B changes. A space for allowing the vapor of B to stay is provided, and the vapor pressure at room temperature that volatilizes in the space is lower in the volatile drug B than in the volatile drug A, and the volatile drug A and the volatile While the medicine B is volatilized and is kept below a certain vapor concentration in the space formed by the volatilization amount control film and the humidity sensitive film, When the volatile drug A staying in the space is preferentially released from the humidity-sensitive membrane to the outside according to changes in the external humidity environment, and the volatile drug A becomes a certain amount or less, it is volatile. It is possible to detect that the remaining amount of the volatile drug A has become a certain amount or less when the drug B is gradually released to the outside and the user feels the odor of the volatile drug B. With the above configuration, the vapor pressure at room temperature is lower in the volatile drug B than in the volatile drug A, so the volatile drug A has priority over the humidity sensitive film of the volatile drug sustained release member from the volatile drug B to the outside. Is gradually released. However, since the vapor pressure decreases when the volatile drug A becomes a certain amount or less, only the volatile drug B starts to be gradually released to the outside. As a result, the user can easily identify and judge that the remaining amount of the volatile drug A has become a certain amount or less by sensing the odor of the volatile drug B that has not been felt until now.
[0012]
The volatilizing drug sustained release member and the air conditioner using the same in the embodiment of the second invention Residual concentration at which the amount of volatile drug A released from the volatile drug sustained-release member feels odorous to humans The amount released from the volatile drug B is less than the threshold and is released when the remaining amount of the volatile drug A falls below a certain amount. Residual concentration at the level where humans smell Above the threshold. As a result, the release amount of the volatile drug A from the volatile drug sustained release member is reduced. Residual concentration at the level where humans smell Since it is below the threshold value, the user does not feel uncomfortable due to the odor of the drug A, and can receive the effects of the drug A. Moreover, since the release amount of the volatile drug B from the volatile drug sustained release member is not less than the threshold value alone, the volatile drug B of the volatile drug B is gradually released when the remaining amount of the volatile drug A becomes a certain amount or less. By releasing from the release member, the user can easily determine that the remaining amount of the volatile drug A has become a certain amount or less by feeling the odor of the volatile drug B.
[0013]
First 3 The volatile drug sustained release member and the air conditioner using the volatile drug release member in the embodiment of the present invention are the volatile drug A arranged inside the volatile quantity control film and the volatile drug B arranged inside the volatile quantity control film. And individually humidity sensitive membrane Container covered with Arranged inside. As a result, the volatilizing agent A and the volatilizing agent B are individually packaged in the volatilization amount control film, so even if the volatilizing agent A and the volatilizing agent B are compatible with each other, the vapor pressure characteristics are improved. Without affecting, the volatile drug A and the volatile drug B can be in a state of staying in the space with individual vapor pressure characteristics. As a result, the user can feel the odor of the volatile drug B by the sustained release of the volatile drug B remaining after the volatile drug A is preferentially released from the humidity sensitive film.
[0014]
First 4 In the embodiment of the invention, the volatile drug sustained release member and the air conditioner using the volatile drug A are allyl isothiocyanate, and the volatile drug B is l-menthol or d-limonene. Initially, allyl isothiocyanate having a high vapor pressure is preferentially released, but when the remaining amount of allyl isothiocyanate falls below a certain amount, only l-menthol or d-limonene is released. -It is possible to identify and judge that the user senses the odor of limonene and the remaining amount of allyl isothiocyanate is below a certain level.
[0015]
First 5 The volatile drug sustained release member and the air conditioner using the same in the embodiment of the invention
The film for controlling the volatilization amount of the agent is a polyethylene film, a polypropylene film, a polyethylene terephthalate film, or a composite laminate film thereof. Sufficient sustained release effect can be obtained by using a polyethylene film, a polypropylene film, a polyethylene terephthalate film or a composite laminate film thereof as a primary control film for controlling the volatilization amount of the liquid drug.
[0016]
First 6 The volatile drug sustained release member and the air conditioner using the same in the embodiment of the invention have a laminate structure in which a humidity sensitive film includes viscose processed paper on the surface. By using a humidity-sensitive film having a laminate structure containing viscose processed paper, a humidity-sensitive film sensitive to humidity can be provided.
[0017]
First 7 In the air conditioner according to the embodiment of the present invention, the humidity sensitive membrane surface of the volatile drug sustained release member was disposed so as to face the upstream side surface of the heat exchanger. By directing the humidity-sensitive membrane surface of the volatile drug sustained-release member to the heat exchanger side, it is possible to quickly feel the humidity increase from the heat exchanger side and improve the sustained-release response of the drug.
[0018]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0019]
Example 1
FIG. 1 is a front external view of a volatile drug sustained release member according to the present embodiment, and FIG. 2 is a side sectional configuration diagram of the volatile drug sustained release member.
[0020]
1 is a cast polypropylene (CPP) 370 μm / ethylene vinyl alcohol copolymer polymer (EVOH) 60 μm / CPP 370 μm co-extruded sheet, 0.8 mm thick container made by vacuum forming, the inner dimensions are 50 × 170 × 10 mm It is. 2 was mixed with 15 g of allyl isothiocyanate as a volatile drug A and cellulose ethyl ether in a weight ratio of 8: 1 to increase the viscosity to about 15000 cps, and then transferred to a calcium carbonate powder tank to form a dango state. . 3 is a pillow package of a laminate film that becomes a volatilization control film of allyl isothiocyanate, and is a primary control film, and laminates allyl isothiocyanate 2 in a dango state with stretched polypropylene (OPP) 30 μm and polyethylene (LDPE) 70 μm. The LDPE side of the film is pillow-wrapped by heat sealing. No. 4 was mixed with 10 g of d-limonene as a volatile chemical B and cellulose ethyl ether at a weight ratio of 4: 1 to increase the viscosity to about 80000 cps, and then transferred to a titanium dioxide powder tank to form a dango state. . 5 is a pillow package of a laminate film that becomes a volatilization control film of d-limonene, and is a primary control film, and d-limonene 4 which is in a dango state is laminated with stretched polypropylene (OPP) 30 μm and polyethylene (LDPE) 70 μm. The LDPE side of the film is pillow-wrapped by heat sealing. Reference numeral 6 denotes a humidity sensitive film in which viscose processed paper is disposed on the surface, which becomes a secondary control film. The humidity sensitive film 6 is a CPP film 30 μm / LDPE film 15 μm with a viscose film 7 g / m through a rayon / pulp nonwoven fabric. 2 What was formed with the application quantity of was used. The humidity sensitive film 6 has a width of 5 mm and is welded and joined to the container 1 on the PP side by heat sealing. Reference numeral 7 denotes a space formed by the pillow package 3, the pillow package 5, and the humidity sensitive film 6, and the volume in the space is 35 ml. Laminated film pillow package 3 and pillow package 5 were fixed in position by hot-melting (not shown) LDPE at the bottom of the inner surface of container 1.
[0021]
The vaporized allyl isothiocyanate vapor and d-limonene vapor reach the space 7 while the amount of volatilization is suppressed by the laminate film 3 and the laminate film 5, and the amount of chemical permeation to the humidity sensitive membrane 6 as the secondary control film is laminated. Since it is smaller than the film, it will be in a state where a high concentration of the drug stays to some extent. In this case, when allyl isothiocyanate and d-limonene are compared, for example, at 25 ° C., the vapor pressure of allyl isothiocyanate is about 5 mmHg, and the vapor pressure of d-limonene is about 2 mmHg. Will preferentially evaporate and stay. In the case of low humidity, allyl isothiocyanate vapor and d-limonene vapor are maintained in the space portion 7 in a state where the sum of partial pressures is close to the saturated vapor pressure. However, when the humidity increases, allyl isothiocyanate vapor and d-limonene vapor easily pass through the humidity sensitive membrane 6 and are released to the outside. The humidity sensitive membrane 6 swells and becomes loose due to changes in humidity, and allyl isothiocyanate molecules and d-limonene molecules are easily transmitted and released to the outside. In order to replenish this released amount, allyl isothiocyanate vapor and d-limonene vapor further pass through the laminate films 3 and 5 and volatilize into the space 7. By the volatile drug sustained release member having such a configuration, allyl isothiocyanate is continuously released at a level of 100 mg / day from a humidity sensitive film at 30 ° C. and a relative humidity of 95%, thereby providing a gas-phase fungicidal effect. It became possible. Further, the drug release characteristics from the volatile drug sustained release member hardly changed until the remaining amount of allyl isothiocyanate became 10 wt% or less with respect to the initial value.
[0022]
FIG. 3 shows the release characteristics of allyl isothiocyanate and d-limonene of the volatile drug sustained-release member obtained in Example 1. If the remaining amount of allyl isothiocyanate decreases and the release amount decreases, the partial pressure of allyl isothiocyanate in the space decreases, so that the volatilization and release of d-limonene is emphasized, so that the user can d -Feeling the odor of limonene, and as a result, it becomes possible to recognize that the remaining amount of allyl isothiocyanate has decreased.
[0023]
Next, the case where the volatile chemical | medical agent sustained release member by a present Example is used for the indoor unit of an air conditioner is demonstrated.
[0024]
FIG. 4 is a cross-sectional configuration diagram of the indoor unit of the air conditioner showing the present embodiment. The indoor air is sucked in through the suction grills 8 and 9, and the sucked air is cooled and dehumidified by the heat exchangers 10 and 11, and then sucked and blown by the cross flow fan 12 to provide cool air from the final outlet 13 to the indoor space. To do. Upper and lower deflection blades 14 are disposed at the outlet 13 to control the direction of blowing into the indoor space. At this time, the condensed water dehumidified by the heat exchangers 10 and 11 reaches the drain pan portions 15 and 16 through the heat exchanger aluminum fins. The drain pan 15 is configured as an integral part of the indoor unit frame 17, and the drain pan 16 is configured as an integral part of the blowing grill 18. Condensed water accumulated in the drain pan 15 flows to the drain pan 16 via the frame 17 and is received by water, and finally discharged to the outside via a drain port (not shown). The aluminum fins of the heat exchangers 10 and 11 have a structure in which vertical slits are provided in order to increase the efficiency of heat exchange performance. For this reason, the condensed water forms a water film by surface tension at the slit portion, and is difficult to be dripped immediately onto the drain pan portions 15 and 16, so that the aluminum fin dries and the speed becomes slow. For example, in an environmental atmosphere of 25 ° C. and a relative humidity of 90%, it takes several tens of hours for the heat exchanger aluminum fins to dry and does not readily dry. At this time, the indoor unit space, particularly the inside of the blower circuit constituted by the heat exchangers 10 and 11, is exposed to an atmosphere having a relative humidity of 95% or more, which is an environmental condition in which molds are very prone to breed. Reference numeral 19 denotes a volatile drug sustained release member, which is disposed on the lower upstream side in the vicinity of the heat exchanger 11, and has a configuration in which the humidity sensitive film 6 side of the volatile drug sustained release member 19 faces the heat exchanger. As a result, after the cooling and dehumidifying operations are stopped, the upper and lower deflection blades 14 are closed, and when the air in a high humidity state fills the entire indoor unit and reaches the humidity sensitive film 6, the volatile drug sustained release member The allyl isothiocyanate 1 diffuses from the inside of the heat exchanger 11 to the heat exchanger 11 side and passes between the aluminum fins, so that the upper and lower deflection blades 14 are in a closed state. It gradually spreads and accumulates to etc. As a result, the interior of the indoor unit can retain allyl isothiocyanate vapor of about 3 to 5 ppm at the bottom of the space constituted by the heat exchangers 10 and 11 and 1 ppm or more in the upper low-concentration space. The high-concentration allyl isothiocyanate vapor staying in the space 7 of the volatile drug sustained release member 19 permeates the humidity sensitive film 7 and diffuses into a space 500 to 5000 times larger. Since the threshold value of allyl isothiocyanate is about 10 ppm, the residence concentration is at a level where no odor is felt. As a result, it was possible to obtain a sufficient fungicidal effect on common molds such as Cladosporium, Alternaria, Aspergillus, Penicillium and Rhizopus present in the indoor space. In order to obtain an antifungal effect, the allyl isothiocyanate vapor to the indoor unit is desirably 0.5 ppm or more, and practically desirable to be 10 ppm or less which is a human threshold.
[0025]
Cellulose ethyl ether used in the present example is obtained by alkaline celluloseization with caustic soda using purified pulp as a raw material, and then reacting ethyl chloride to replace the hydroxyl group in glucose with an ethoxyl group. It was shown in Chemical formula 1). The appearance is a white powder and has almost odorless characteristics. In order to solidify or thicken the drug with cellulose ethyl ether, it depends on the weight average molecular weight, and specifically 100,000 or more were preferred. Further, solidification can be achieved by setting the weight ratio of allyl isothiocyanate or d-limonene to cellulose ethyl ether to 2: 1, and the viscosity gradually decreases as the weight ratio increases. It cannot be said that the viscosity of the drug stock is increased so much. Therefore, in order to solidify or thicken the liquid volatile agent, it can be said that the weight ratio of cellulose ethyl ether is preferably 2: 1 to 10: 1.
[0026]
[Chemical 1]
Figure 0004556390
[0027]
(Example 2)
FIG. 5 is a front external view of the volatile drug sustained-release member according to the present embodiment, and FIG. 6 is a side cross-sectional configuration view taken along the volatile drug sustained-release member aa ′ line. Reference numeral 20 denotes a polyurethane continuous porous body that has swelled by absorbing allyl isothiocyanate to be the volatile chemical A. Specifically, 35 x 35 x 10 polyurethane continuous porous material, bulk density of 0.35 g / ml, average pore diameter of 30 µm, porosity of 70%, 20 g of allyl isothiocyanate is absorbed to swell to about 50 x 50 x 14 did. 21 is a pillow package of a laminate sheet that is an exterior of the polyurethane continuous porous body 20. The laminate side of polypropylene 30 μm and polyethylene 70 μm is formed by pillow-wrapping the polyethylene side by heat sealing, and is the primary control. It becomes a film. 22 is a crystal grain of l-menthol serving as a volatile chemical B, 23 is a pillow package of a laminate sheet as an exterior, and the polyethylene side is heat-sealed with a laminate sheet of polypropylene 30 μm and polyethylene 70 μm. It is a pillow package and becomes the primary control membrane. 24 is a container made of translucent polypropylene and a thickness of 2 mm for filling it, and was processed by injection molding. The inner dimensions of the container are 55 × 55 × 35 mm. Inside the main body container 24, the 1-menthol pillow package 23 is arranged on the lower side, and the allyl isothiocyanate pillow package 21 is arranged on the upper side. Reference numeral 25 denotes a lid for the main body container 24, which is also made of translucent polypropylene and a thickness of 2 mm. A large window is provided at the center of the lid 25, ribs 26 are formed at two locations so as to extend in the longitudinal direction, and a 30 × 30 mm humidity sensitive film 27 is disposed at the center of the surface side of the lid 25, The ribs 26 serve to fix the position of the pillow packages 21 and 23 inside the container and to reinforce the humidity sensitive film 27. Humidity sensitive film 27 is made of viscose processed paper, stretched polypropylene 30 μm / polyethylene 40 μm, viscose film 7 g / m via rayon / pulp nonwoven fabric. 2 The outer peripheral portion of the humidity sensitive film 27 is welded and joined to the lid 25 on the polypropylene side by heat sealing. The heat seal width is 3 mm. The main body container 24 and the lid 25 are joined by ultrasonic joining. Reference numeral 28 denotes a space formed by the pillow packaging bodies 21 and 23, the main body container 24, and the lid 25, and the space volume is about 15 ml.
[0028]
The allyl isothiocyanate volatilized from the polyurethane continuous porous body 20 stays in the space 28 while the volatilization amount is suppressed by the pillow packaging body 21, and to the outside of the allyl isothiocyanate in the case of low humidity by the humidity sensitive film 27. However, when the humidity increases, the allyl isothiocyanate vapor easily passes through the humidity sensitive film 27 and is released to the outside. While the allyl isothiocyanate remains sufficiently inside the volatile drug sustained release member, the sustained release amount of l-menthol having a low vapor pressure is suppressed, but when the remaining amount of allyl isothiocyanate is below a certain level, allyl in the space Since the isothiocyanate partial pressure decreases, the volatilization amount of l-menthol also increases, and the user can identify and judge that the remaining amount of allyl isothiocyanate has decreased by feeling the odor of l-menthol. FIG. 7 shows the release characteristics of allyl isothiocyanate and 1-menthol of the volatile drug sustained-release member obtained in Example 2.
[0029]
The volatile drug sustained release member obtained in this example was applied to a shoe box having an internal volume of 150 liters, and was able to obtain a sufficient function without causing fungi on leather shoes or the like.
[0030]
In the examples, a multi-layer laminate sheet or a translucent polypropylene resin was used as a container for filling a drug. However, the present invention is not limited to this. In addition, a material having no problem may be selected in view of chemical resistance with the medicine to be filled. In addition, polyethylene terephthalate resin, polycarbonate resin, polyethylene naphthalate resin, polyethylene resin, methylpentene resin, and the like can be used.
[0031]
In Examples, the liquid volatile agent was thickened with cellulose ethyl ether and stored in a pillow package, or it was absorbed into a polyurethane continuous porous material and stored in a pillow package. Since it is difficult to store the volatile chemical directly in the pillow package, it is preferable that the volatile chemical is handled to some extent and stored in the pillow package. Polyvinyl butyral as shown in (Chemical Formula 2) can also be used to thicken a liquid volatile chemical. What is solid crystallized at room temperature, such as l-menthol, can be directly packaged in a primary control membrane.
[0032]
[Chemical 2]
Figure 0004556390
[0033]
In the examples, a composite laminate film of polypropylene and polyethylene was used as the primary control film for controlling the volatilization amount of the drug, but what can be used in the present invention is not limited to this. In addition, a polyethylene film, a polypropylene film, and a polyurethane film can be used alone or in combination as a laminate structure film. Moreover, it is preferable to select a primary control film | membrane according to a use, considering the permeation amount of the volatile chemical | medical agent with which an inside is filled.
[0034]
In the examples, a laminate structure including viscose-processed paper on the surface was used as the humidity-sensitive film. However, viscose-processed paper has a very rigid film structure under low humidity conditions. Under the conditions, the viscose swells and changes to a loose structure, so that the volatile drug easily penetrates from the inside. Therefore, it had excellent characteristics as a humidity sensitive film.
[0035]
In the examples, allyl isothiocyanate was used as the volatile drug A and 1-menthol or d-limonene was used as the volatile drug B, but those that can be used in the present invention are not limited thereto. It is preferable that the volatile drug B has a lower vapor pressure at room temperature than the volatile drug A, and it is preferable that the user can recognize the volatile drug B by the sustained release characteristics of the volatile drug B alone. The volatile drug A and the volatile drug B are retained in the space of the volatile drug sustained-release member, and the volatile drug A and the volatile drug B are gradually released as necessary. Since it disappears, the volatilization amount of the volatile drug B increases thereafter, and the user can recognize the volatile drug B. Allyl isothiocyanate is a drug that provides antibacterial and antifungal effects at a low concentration of volatilization and has a wide range of applications. It was possible to use it effectively.
[0036]
In the examples, the volatile drug A and the volatile drug B are separately packaged. However, in order to smoothly shift from the decrease in the remaining amount of the volatile drug A to the increase in the volatile volume of the volatile drug B, It is preferable that the volatile drug A and the volatile drug B are individually packaged in a pillow so that the volatile drugs are not affected by azeotropic mixing.
[0037]
In the embodiments, the application of a general separate type air conditioner to an indoor unit and the application to a shoe box have been described, but the use of the volatile drug sustained release member according to the present invention is not limited thereto. It can be widely used in fields where it is desired to prevent the growth of mold and fungi due to seasonal changes or changes in the ambient humidity environment. For example, it can be used in bathrooms, changing rooms, food stockers, storerooms, underground storage. It can also be applied to humidifying passages and ventilation passages for building air conditioning.
[0038]
【The invention's effect】
As is clear from the above examples, the vapor pressure at room temperature is lower in the volatile drug B than in the volatile drug A, so that the volatile drug A is more sensitive to the humidity of the volatile drug sustained release member than the volatile drug B. Preferentially released from the membrane to the outside. However, when the volatile drug A becomes a certain amount or less, the vapor pressure decreases, so that the volatile drug B starts to be gradually released to the outside. As a result, the user can easily determine that the remaining amount of the volatile drug A has become a certain amount or less by sensing the odor of the volatile drug B that has not been felt until now. Since the release amount of the volatile drug A from the volatile drug sustained release member is not more than the threshold value, the user can receive the effect of the drug A without discomfort due to the odor of the drug A. Moreover, since the release amount of the volatile drug B from the volatile drug sustained release member is not less than the threshold value alone, the volatile drug B of the volatile drug B is gradually released when the remaining amount of the volatile drug A becomes a certain amount or less. By releasing from the release member, the user felt the odor of the volatile drug B and could easily determine that the remaining amount of the volatile drug A was below a certain amount. Even if the volatile drug A and the volatile drug B are compatible with each other by separately packaging the volatile drug A and the volatile drug B in the volatilization amount control film, the vapor pressure characteristics are affected. Thus, the volatile drug A and the volatile drug B could be volatilized with individual vapor pressure characteristics. When volatile drug A is allyl isothiocyanate and volatile drug B is l-menthol or d-limonene, initially allyl isothiocyanate is preferentially released, and the remaining amount of allyl isothiocyanate is below a certain amount. In this case, the release of l-menthol or d-limonene allowed the user to feel the odor of l-menthol or d-limonene and determine that the remaining amount of allyl isothiocyanate was below a certain level.
[Brief description of the drawings]
1 is a front external view of a volatile drug sustained-release member of Example 1. FIG.
2 is a side cross-sectional configuration diagram of a volatile drug sustained-release member of Example 1. FIG.
FIG. 3 is a graph of release characteristics of allyl isothiocyanate and d-limonene of the volatile drug sustained-release member obtained in Example 1.
FIG. 4 is a cross-sectional configuration diagram of an indoor unit of the air conditioner according to the first embodiment.
5 is a front external view of the volatile drug sustained-release member of Example 2. FIG.
6 is a side cross-sectional configuration diagram of the volatile drug sustained-release member of Example 2. FIG.
7 is a graph showing the release characteristics of allyl isothiocyanate and l-menthol in the volatile drug sustained-release member obtained in Example 2. FIG.
[Explanation of symbols]
2 Allyl isocyanate
3, 5, 21, 23 Pillow package (laminate film)
4 d-limonene
6, 27 Humidity sensitive membrane
7, 28 Space
10, 11 Heat exchanger
19 Volatile drug sustained release member
20 Polyurethane continuous porous body
22 l-menthol

Claims (8)

揮散性薬剤A及び揮散性薬剤Bとをそれぞれ揮散量を制御する揮散量制御膜内部に配置するとともに、この揮散量制御膜内部に配置した揮散性薬剤A及び揮散性薬剤Bとを容器内に設け、前記容器の開口を湿度変化によって前記揮散性薬剤Aと前記揮散性薬剤Bとの透過量が変化する湿度感受性膜によって覆うことにより、前記揮散量制御膜と前記湿度感受性膜の間に揮散した前記揮散性薬剤Aと前記揮散性薬剤Bの蒸気が滞留するための空間部を設け、前記空間部に揮散する常温での蒸気圧は前記揮散性薬剤Aよりも前記揮散性薬剤Bのほうが低く、前記揮散性薬剤Aと前記揮散性薬剤Bとが揮散して前記揮散量制御膜と前記湿度感受性膜とで形成された前記空間部で一定の蒸気濃度以下に保たれながら、外部の湿度環境変化に応じて前記空間部に滞留している揮散性薬剤Aが前記湿度感受性膜から外部へ優先的に徐放され、揮散性薬剤Aが一定量以下になった時、揮散性薬剤Bが外部へと徐放され、利用者が揮散性薬剤Bの臭気を感じることによって揮散性薬剤Aの残量が一定量以下になったことを検知できることを特徴とする揮散性薬剤徐放部材。  The volatile agent A and the volatile agent B are arranged inside the volatilization amount control film for controlling the volatilization amount, and the volatile agent A and the volatile agent B arranged inside the volatilization amount control film are placed in the container. Provided and covered between the volatilization amount control film and the humidity sensitive film by covering the opening of the container with a humidity sensitive film in which the permeation amount of the volatile chemical A and the volatile chemical B is changed by humidity change. The volatile drug A and the volatile drug B are provided with a space for the vapor to stay, and the vapor pressure at room temperature for volatilization in the space is higher than that of the volatile drug A. Low, while the volatile chemical A and the volatile chemical B are volatilized and kept at a certain vapor concentration or less in the space portion formed by the volatilization amount control film and the humidity sensitive film, external humidity According to environmental changes Volatile drug A staying in the space is preferentially and gradually released from the humidity sensitive membrane to the outside, and when the volatile drug A becomes a certain amount or less, the volatile drug B is gradually released to the outside. A volatile drug sustained-release member characterized in that the user can detect that the remaining amount of the volatile drug A has become a certain amount or less by feeling the odor of the volatile drug B. 揮散性薬剤徐放部材からの揮散性薬剤Aの放出量が、人間がにおいを感じるレベルの残留濃度閾値以下であり、揮散性薬剤Aの残量が一定量以下になった時放出される、揮散性薬剤Bからの放出量が、人間がにおいを感じるレベルの残留濃度閾値以上であることを特徴とする請求項1記載の揮散性薬剤徐放部材。 The release amount of the volatile drug A from the volatile drug sustained-release member is below the residual concentration threshold at which humans feel odor , and is released when the remaining amount of the volatile drug A falls below a certain amount. The volatile drug sustained-release member according to claim 1 , wherein the release amount from the volatile drug B is equal to or higher than a residual concentration threshold at which humans feel odor . 揮散量制御膜内部に配置された揮散性薬剤Aと揮散量制御膜内部に配置された揮散性薬剤Bとが個別に湿度感受性で覆った容器内部に配置されていることを特徴とする請求項1または2記載の揮散性薬剤徐放部材。  The volatile agent A arranged inside the volatilization amount control film and the volatile agent B arranged inside the volatilization amount control film are individually arranged inside a container covered with humidity sensitivity. 3. The volatile drug sustained-release member according to 1 or 2. 揮散性薬剤Aがアリルイソチオシアネートであり、揮散性薬剤Bがl−メントールまたはd−リモネンであることを特徴とする請求項1〜3のいずれかに記載の揮散性薬剤徐放部材。  The volatile drug A is an allyl isothiocyanate, and the volatile drug B is 1-menthol or d-limonene, The volatile drug sustained-release member according to any one of claims 1 to 3. 薬剤の揮散量を制御する膜がポリエチレンフィルム、ポリプロピレンフィルム、ポリエチレンテレフタレートフィルムまたはそれらの複合ラミネートフィルムであることを特徴とする請求項1〜4のいずれかに記載の揮散性薬剤徐放部材。  The volatile drug sustained-release member according to any one of claims 1 to 4, wherein the film for controlling the volatilization amount of the drug is a polyethylene film, a polypropylene film, a polyethylene terephthalate film, or a composite laminate film thereof. 湿度感受性膜が表面にビスコース加工紙を含んでなるラミネート構造であることを特徴とする請求項1〜5のいずれかに記載の揮散性薬剤徐放部材。  The volatile drug sustained-release member according to any one of claims 1 to 5, wherein the humidity-sensitive film has a laminate structure including viscose-processed paper on the surface. 少なくとも熱交換器と、前記熱交換器により温度調節された風を室内へ吹出すための室内ファンとを有する室内機において、請求項1〜6のいずれかに記載の揮散性薬剤徐放部材を、前記熱交換器近傍の上流側に配置したことを特徴とする空気調和機。  The indoor unit having at least a heat exchanger and an indoor fan for blowing out the air temperature-controlled by the heat exchanger into the room, the volatile drug sustained release member according to any one of claims 1 to 6 An air conditioner arranged upstream of the heat exchanger. 揮散性薬剤徐放部材の湿度感受性膜面を熱交換器の上流側面と向い合わせとなるように配置したことを特徴とする請求項7に記載の空気調和機。  The air conditioner according to claim 7, wherein the humidity sensitive membrane surface of the volatile drug sustained release member is disposed so as to face the upstream side surface of the heat exchanger.
JP2003197147A 2003-07-15 2003-07-15 Volatile drug sustained release member and air conditioner using the same Expired - Fee Related JP4556390B2 (en)

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JP6211797B2 (en) * 2012-05-14 2017-10-11 パナソニック株式会社 Deodorizing device with deodorant and refrigerator with deodorizing device
WO2018070456A1 (en) * 2016-10-13 2018-04-19 ミツミ電機株式会社 Perfume diffusing device
JP2018086230A (en) * 2016-10-13 2018-06-07 ミツミ電機株式会社 Aroma ejection device
CN112594889B (en) * 2020-11-26 2022-09-06 青岛海尔空调器有限总公司 Air conditioner control method and device, electronic equipment and computer storage medium

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JPH01131663A (en) * 1987-11-17 1989-05-24 Takasago Internatl Corp Aromatic
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JPH01131663A (en) * 1987-11-17 1989-05-24 Takasago Internatl Corp Aromatic
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JP2003159318A (en) * 2001-11-28 2003-06-03 Matsushita Electric Ind Co Ltd Member for slowly releasing volatile chemical and air conditioner using the same

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