JP3694952B2

JP3694952B2 - Inside / outside air switching device for vehicle air conditioning

Info

Publication number: JP3694952B2
Application number: JP00510396A
Authority: JP
Inventors: 学宮田; 伊藤　　功治; 輝彦亀岡; 四方　　一史; 光杉; 浩司松永; 久志植田; 俊彰野村; 上村　　幸男; 健司諏訪
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 1995-02-09
Filing date: 1996-01-16
Publication date: 2005-09-14
Anticipated expiration: 2016-01-16
Also published as: JPH08276723A

Description

【０００１】
【発明の属する技術分野】
本発明は、車両空調用内外気切替装置に関するものである。
【０００２】
【従来の技術】
従来、車両空調用内外気切替装置には、図１３に示すように、板状フィルタ９を内気導入口７２及び外気導入口７１より吸込口１０２に向かう空気の流れに直交するように配置し、内気導入口７２と外気導入口７１との開閉を板ドア８の回転により行う板ドア方式がある。
【０００３】
また、実開平２−１７４１３号公報に記載のように、板状フィルタと一体化された回転式ドアを、フィルタ側が送風用ファンの吸入口側になるように回転可能に配置し、回転式ドアの回転により内気導入口及び外気導入口の開閉を行う回転式ドア方式がある。
【０００４】
【発明が解決しようとする課題】
上記従来の板ドア方式の車両空調用内外気切替装置では、板状フィルタ９が内気導入口７２及び外気導入口７１より吸込口１０２に向かう空気の流れに直交するように配置されているため、フィルタ面積を大きくすると、空気の通路断面が大きくなるという問題がある。
【０００５】
また、上記従来の回転式ドア方式の車両空調用内外気切替装置では、フィルタ面積を大きくすると、回転式ドアの回転半径方向寸法が大きくなるという問題がある。
本発明は、上記点に鑑み、内気導入口及び外気導入口より送風用ファンの吸込口に向かう空気の流れの通路断面が大きくならず、しかも回転式ドアの回転半径方向寸法が大きくならないで、フィルタ面積を大きくする車両空調用内外気切替装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明は、上記目的を達成するために、以下の技術的手段を用いる。請求項１〜４に記載の発明では、内外気切替ケ−ス（１）内に、回転可能に配置され、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）の開閉を行う回転式ドア（２）と、内気導入口（１２Ａ、１２Ｂ）ならびに外気導入口（１１）より下流側に、回転式ドア（２）とは独立に配置されたフィルタ（３）とを具備している。そして、フィルタ（３）は、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）より吸込口（４２）に向かう空気の流れに交差するように配置され、かつ、前記フィルタ（３）は、曲げられた形状を有していることを特徴とする。
【０００７】
請求項１に記載の発明では、フィルタ（３）は、台形状または半円筒状に曲げられていることを特徴とする。請求項２、３に記載の発明では、回転式ドア（２）の回転方向に対して、フィルタ（３）の曲げ方向が直交するようにフィルタが配置されていることを特徴とする。
【０００８】
請求項４に記載の発明では、フィルタ（３）は、回転式ドア（２）の空気下流側に配置され、フィルタ（３）は、回転式ドア（２）側に向かって凸となるように曲げられていることを特徴とする。請求項５に記載の発明では、内外気切替ケ−ス（１）内に、回転可能に配置され、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）の開閉を行う回転式ドア（２）と、内気導入口（１２Ａ、１２Ｂ）ならびに外気導入口（１１）より下流側に、回転式ドア（２）とは独立に配置されたフィルタ（３Ｂ）とを具備している。そして、フィルタ（３Ｂ）は、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）より吸込口（４２）に向かう空気の流れに対し斜めとなるように配置され、内気導入口が複数設けられフィルタ（３Ｂ）が、複数の内気導入口（１２Ａ、１２Ｂ）のうち、少なくとも一つの内気導入口（１２Ｂ）より空気上流側に配置されたことを特徴とする。
【０００９】
請求項６に記載の発明では、請求項１ないし４のいずれか１つに記載の車両空調用内外気切替装置において、内気導入口が複数設けられていることを特徴とする。
【００１０】
請求項７、８に記載の発明では、フィルタ（３、３Ａ、３Ｂ）が円弧状ドア部（２１）と支持軸（２３）との間に配置されたことを特徴とする。請求項９に記載の発明では、請求項１ないし８のいずれか１つに記載の車両空調用内外気切替装置において、内気導入口（１２Ａ）には、紙屑等のごみの導入を防ぐ内気格子（１５）が、脱着可能に配置されていることを特徴とする。
【００１１】
請求項１０に記載の発明では、請求項９に記載の車両空調用内外気切替装置において、内気格子（１５）は、爪部（１６）に係止されて内外気切替ケース（１）に組付けられていることを特徴とする。
請求項１１に記載の発明では、請求項８ないし１０に記載の車両空調用内外気切替装置において、内外気切替ケース（１）は、ドア支持部（２４）と平行な第１側面部（１３）を有している。そして、ドア支持部（２４）または第１側面部（１３）のうち少なくとも一方側には、他方側に接するようにガイド部（２ａ）が設けられていることを特徴とする。
【００１２】
請求項１２に記載の発明では、請求項８ないし１１に記載の車両空調用内外気切替装置において、支持軸（２３）の先端部には、支持軸（２３）が挿入部（１３ａ）から抜けることを防止するフランジ部（２３ａ）が形成されていることを特徴とする。
請求項１３に記載の発明では、請求項１１または１２に記載の車両空調用内外気切替装置において、内外気切替ケース（１）には、第１側面部（１３）と直角な第２側面部（１４）が設けられ、送風用ケーシング（１）には、第２側面部（１４）と平行な壁面（４３ａ）を有するフィルタ支持部（４３）が形成されている。そして、フィルタ（３）は、第２側面部（１４）とフィルタ支持部（４３）との間に挟まれて保持されていることを特徴とする。
【００１３】
請求項１４に記載の発明では、請求項１３に記載の車両空調用内外気切替装置において、回転式ドア（２）が内気導入口（１２Ａ）を閉じたとき、回転式ドア（２）とフィルタ支持部（４３）との隙間を密閉するシール片（２６）が、回転式ドア（２）の内面側に設けられていることを特徴とする。
請求項１５に記載の発明では、請求項１ないし１４のいずれか１つに記載の車両空調用内外気切替装置において、回転式ドア（２）は、歯車部（２７）を介して内外気切替ケース（１）の第１側面部（１３）に配置されたモータ（２８）によって駆動されていることを特徴とする。
【００１４】
次に作用効果をのべる。
請求項１〜１５記載の発明によれば、回転式ドア（２）とは独立に配置されたフィルタ（３）とを具備しているので、回転式ドア（２）の回転半径寸法とは独立にフィルタ面積を大きくすることができる。
また、回転式ドア（２）とは独立に配置されたフィルタ（３）とを具備しているので、従来の回転式ドアに比べて回転式ドアの駆動トルクを小さくすることできる。
【００１５】
請求項１〜４記載の発明によれば、フィルタ（３）は、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）より吸込口（４２）に向かう空気の流れに交差するように配置され、かつ、フィルタ（３）は、曲げられた形状を有しているので、空気の流れの通路断面を大きくしないで、従来の板状フィルタに比べてフィルタ面積を大きくすることができる。
【００１６】
請求項５記載の発明によれば、フィルタ（３Ｂ）は、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）より吸込口（４２）に向かう空気の流れに対し斜めとなるように配置されているので、空気の流れの通路断面を大きくしないで、従来の板状フィルタに比べてフィルタ面積を大きくすることができる。
請求項７記載の発明によれば、フィルタ（３Ｂ）が、複数の内気導入口（１２Ａ、１２Ｂ）のうち、少なくとも一つの内気導入口（１２Ｂ）より空気上流側に配置されされているため、内気導入時において、導入された空気のうち一部はフィルタ（３Ｂ）を通過しないので、フィルタ（３Ｂ）による通風抵抗を小さくすることでき、その結果、空気の吸入量を増やすことができる。
【００１７】
請求項７、８記載の発明によれば、回転式ドア（２）は、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）の開閉を行う円弧状ドア部（２１）と、円弧状ドア部（２１）の軸方向の端部に直角に結合されたドア支持部（２４）と、ドア支持部（２４）のうち回転式ドア（２）の回転中心となる部位に設けられた支持軸（２３）とを有し、フィルタ（３、３Ａ、３Ｂ）が円弧状ドア部（２１）と支持軸（２３）との間に配置されているので、内気導入口（１２Ａ、１２Ｂ）及び外気導入口（１１）からフィルタ（３、３Ａ、３Ｂ）までの寸法を小さくすることができ、その結果、装置の外形寸法をより一層小さくすることができる。
【００１８】
請求項１２に記載の発明によれば、支持軸（２３）の先端部にはフランジ部（２３ａ）が形成されているので、支持軸（２３）が挿入部（１３ａ）から抜けることを防止することができる。
請求項１５に記載の発明によれば、回転式ドア（２）は、歯車部（２７）を介して内外気切替ケース（１）の第１側面部（１３）に配置されたモータ（２８）によって駆動されているので、リンク機構等を用いて回転式ドア（２）を駆動する場合に比べて、部品点数を低減することができる。したがって、車両空調用内外気切替装置の原価低減を図ることができる。
【００１９】
【発明の実施の形態】
以下、本発明を図に示す実施の形態について説明する。
（第１実施形態）
図１〜５は本実施形態を示すもので、図１に示す車両空調用内外気切替装置は通常、自動車の車室内前部の計器盤下方の助手席側に配置され、室内空気導入と室外空気導入の切り替えを行う。
【００２０】
１は合成樹脂または金属製の内外気切替ケ−スで、後述する送風用ケ−シング４と隣接して、送風用ケ−シング４の吸入口４２側に配置されている。この内外気切替ケ−ス１は、室内空気を導入する２つの並んだ第１内気導入口１２Ａ、第２内気導入口１２Ｂ及び室外空気を導入する外気導入口１１を有している。これらの内外気導入口は吸入口４２に連通している。
【００２１】
また、第２内気導入口１２Ｂは、後述する回転式ドア２の回転方向であって内外気切替ケ−ス１の側面に設けられている。さらに、支持軸２３を支持するためのＵ字形の溝１３ａが内外気切替ケ−ス１の側面下方に設けられている。
２は合成樹脂または金属製の回転式ドアで、内外気切替ケ−ス１内に、回転可能に配置されている。そして、この回転式ドア２の円弧状ドア部２１は、第１内気導入口１２Ａ及び外気導入口１１の開閉を行い、略扇形のドア支持部２４端部に直角に結合されている。
【００２２】
そして、ドア支持部２４には、内外気切替ケ−ス１のうちドア支持部２４と平行な側壁部１３と接するようにガイド部２ａが形成されており、このガイド部２ａは、回転式ドア２が回転して両導入口１２Ａ、１２ｂ、１１を開閉したときに、常に側壁部１３と接するように、図１に示すように、回転式ドア２の回転方向に円弧状に形成されている。なお、このガイド部２ａは、側壁部１３に形成してもよい。
【００２３】
また、支持軸２３は、略扇形のドア支持部２４の回転中心部に外向き直角に設けられいる。さらに、平面ドア部２２は、第２内気導入口１２Ｂの開閉を行い、支持軸２３を中心に所定量回転した位置に略扇形のドア支持部２４から伸びたステ−部２５に直交して結合されている。なお、回転式ドア２は、図４に示すように、支持軸２３をフィルタ３の３ａ面より低くなるようにＵ字形の溝１３ａに回転可能に挿入されている。そして、支持軸２３には、溝１３ａから支持軸２３が抜けることを防止するフランジ部２３ａが、支持軸２３とともに一体形成されている。
【００２４】
３はフィルタで、コルゲ−ト（波形）状の和紙または多孔質のウレタンポ−ラス製の塵埃を取り除くフィルタ部３２と、合成樹脂または金属製の枠を形成する枠体３１とから構成されている。そして、フィルタ３は、内外気切替ケ−ス１内に、第１内気導入口１２Ａ、第２内気導入口１２Ｂ及び外気導入口１１より空気下流側に、回転式ドア２とは独立に配置されるとともに、第１内気導入口１２Ａ、第２内気導入口１２Ｂ及び外気導入口１１より吸入口４２に向かう空気の流れに直交するように、回転式ドア２の空気下流側に配置されている。
【００２５】
そして、フィルタ３は、回転式ドア２側に向かって凸となるように、台形状に両側を折り曲げられているとともに、フィルタ３の折り曲げ方向と回転式ドア２の回転方とが直交するように両側を折り曲げられている。
４は合成樹脂または金属製のスクロ−ル状の送風用ケ−シングで、この送風用ケ−シング４には、そのスクロ−ルの中心に、第１内気導入口１２Ａ、第２内気導入口１２Ｂ及び外気導入口１１方向に向けて開口する吸入口４２が形成されている。そして、送風用ケ−シング４のスクロ−ルの端には、その接線方向に開口する吐出口４１が形成されており、吸入口４２から吐出口４１に至る空気の流路を形成している。なお、吸入口４２の外縁部にはベルマウスが形成されている。
【００２６】
また、送風用ケ−シング４内には、送風用ファン５として遠心式多翼ファン（シロッコファン）と送風用ファン５を駆動するモ−タ６とが配置されている。
なお、フィルタ３は、吸入口４２側に配置されて送風用ケ−シング４に対して脱着可能に装着されている。さらに、内外気切替ケ−ス１と送風用ケ−シング４とは、ボルト、爪嵌合または弾性力によって固定するＣ形クランプ（嵌め込みスプリング）等にて結合されている。
【００２７】
次に、本実施形態の作動を説明する。
支持軸２３を中心とする回転式ドア２の回転により、内気導入と外気導入との切り換えを行う。このとき、回転式ドア２の、円弧状ドア部２１は第１内気導入口１２Ａ及び外気導入口１１の開閉を行い、平面ドア部２２は第２内気導入口１２Ｂの開閉を行う。
【００２８】
内気導入時では、回転式ドア２は図２に示すような位置にあり、空気は内気導入口１２Ａと１２Ｂより導入され、フィルタ３を通過後、吸入口４２から吸入され吐出口４１より吐出される。
また、外気導入時では、回転式ドア２は図３に示すような位置にあり、空気は外気導入口１１より導入され、フィルタ３を通過後、吸入口４２から吸入され吐出口４１より吐出される。
【００２９】
次に本実施形態の特徴を述べる。
回転式ドア２とは独立に配置されたフィルタ３とを具備しているので、回転式ドア２の回転半径寸法とは独立にフィルタ面積を大きくすることができる。
同様に、回転式ドア２とは独立に配置されたフィルタ３とを具備しているので、従来の回転式ドアに比べて回転式ドアの駆動トルクを小さくすることできる。
【００３０】
また、フィルタ３は、台形状に曲げらているので、装置の幅と奥行き寸法の拡大を抑制して、従来の板状フィルタに比べてフィルタ面積を大きくすることができる。
また、フィルタ３の３ａ面が円弧状ドア部２１と支持軸２３の間に配置されているので（図４参照）、フィルタ３の３ａ面と第１内気導入口１２Ａ及び外気導入口１１までの距離を小さくすることでき、その結果、装置の高さ寸法を小さくできる。
【００３１】
さらに、フィルタ通過後の空気の通路に可動部（支持軸２３とドア支持部２４）がないので、従来の回転式ドア方式に比べて、フィルタを通過しない未浄化空気の混入を防ぐこと（密閉性を高めること）を容易にすることができる。
また、ドア支持部２４に形成されたガイド部２ａは、内外気切替ケ−ス１の側壁１３に接しているので、回転式ドア２が回転軸２３方向の変形が抑制されるの。したがって、回転式ドア２の円弧状ドア部２１と各導入口１２Ａ、１２Ｂ、１１との隙間の拡大が抑制されるので、各導入口１２Ａ、１２Ｂ、１１での密閉性の低下を抑制することができる。
【００３２】
（第２実施形態）
図６、７は、第２実施形態を示すもので、第１実施形態において台形状に曲げられたフィルタ３に換えて板状のフィルタ３Ｂとし、このフィルタ３Ｂは、図６のごとく空気流れの通路断面に対し斜めとなるように配置されている。そして、このフィルタ３Ｂは、内気導入口１２Ｂより空気上流側となるようにステ−等（図示されていない）により送風用ケ−シング４に固定されている。
【００３３】
フィルタ３Ｂは、図６に示すように、空気流れの通路断面に対し斜めとなるように配置されているので、装置の幅と奥行き寸法を大きくせず、従来の板状フィルタに比べてフィルタ面積を大きくすることができる。
また、フィルタ３Ｂは平板状であるので、第１実施形態の台形状に曲げられたフィルタ３に比べて製作が容易である。
【００３４】
さらに、内気導入時では，回転式ドア２は図６に示すような位置にあり、内気導入口１２Ａより導入された空気はフィルタ３Ｂを通過後吸入口４２から吸入され、吐出口４１より吐出される。また、内気導入口１２Ｂより導入された空気はフィルタ３Ｂを通過しないで直接吸入口４２から吸入され、吐出口４１より吐出される。その結果、フィルタ３Ｂによる通風抵抗を小さくすることでき、延いては、内気吸入量を増やすことができる。なお、外気導入時は、第１実施例と同じ（図３参照）である。
【００３５】
ところで、第１実施形態において、台形状に曲げられたフィルタ３に換えて、図５に示す半円筒状のフィルタ３Ａとしてもよい。
また、第１実施形態においては、フィルタ３、３Ａは、その曲げ方向が回転式ドア２の回転方向と直交するように配置されていたが、フィルタ３、３Ａの曲げ方向と回転式ドア２の回転方向とが同方向となるように配置してもよい。
【００３６】
さらに、フィルタ３、３Ａは、吸入口４２に向かって凸となるように配置しても本発明は実施することができる。
（第３実施形態）
本実施形態は、上述の実施形態に加えてフィルタの脱着性を考慮したものである。すなわち、図８に示すように、第２内気導入口１２Ｂを内外気切替ケ−ス１の側壁部１３に形成し、フィルタ３を第１内気導入口１２Ａから脱着可能としたものである。
【００３７】
そして、フィルタ３は、図９に示すように、空気流れ方向から見て、矩形状に形成されており、内外気切替ケース１のうち第１内気導入口１２Ａと対抗し、かつ、支持部２４と直角な壁面１４と接している。さらに、送風用ケーシング４には、壁面１４と平行な壁面４３ａを有するフィルタ支持部４３が形成されており、フィルタ３は、このフィルタ支持部４３と壁面１４との間に挟まれて保持されている。
【００３８】
なお、フィルタ３を離脱させるときは、フィルタ３のうちフィルタ支持部４３と接する側の部位を外気導入口１１方向（図８における上方）に移動させ、その状態を維持したまま、フィルタ３を第１内気導入口１２Ａより取り出す。
因みに、第１内気導入口１２Ａには、紙屑等のごみの導入を防ぐ内気格子１５が脱着可能に配置されており、フィルタ３の脱着の際には、内気格子１５を離脱させた後にフィルタ３の脱着を行う。また、内気格子１５は、第１内気導入口１２Ａの外縁部に形成された爪部１６に係止されて内外気切替ケース１に組付けられている。
【００３９】
また、回転式ドア２の内側には、図１０に示すように、樹脂またはゴム等のシール片２６が設けれており、このシール片２６は、回転式ドア２が第１内気導入口１２Ａを閉じたときに、フィルタ支持部４３に接するように配置されている。したがって、シール片２６によってフィルタ支持部４３と回転式ドア２と間の隙間を密閉するので、外気導入口１１を開いたとき（第１内気導入口１２Ａを閉じたとき）に、外気導入口１１から導入された外気が全てフィルタ３を通過する。
【００４０】
（第４実施形態）
本実施形態は、回転式ドア２の駆動手段について考慮したものである。
すなわち、図１１、１２に示すように、ドア支持部２４からステー部２５にかけて回転式ドア２の回転方向に沿うような円弧状の歯車部２７を一体形成し、内外気切替ケース１の側壁１３に駆動用モータ２８を配置する。
【００４１】
そして、駆動用モータ２８の回転軸には、ウォーム歯車２９が圧入されており、このウォーム歯車２９に噛み合う平歯車３０とウォーム歯車２９とを介して、駆動用モータ２８の駆動力が歯車部２７に伝達される。
以上に述べた構成により、リンク機構を用いて回転式ドア２を駆動する場合に比べて、部品点数の低減を図ることができる。
【００４２】
ところで、本実施形態に係る歯車部２７は、ステー部２５のみに設けてもよく、また、別体に形成して回転式ドア２に接着してもよい。また、歯車部２７を円周状に形成してもよい。さらに、ガイド部２ａと歯車部２７とを共用してもよい。また、本実施形態に係る駆動手段は、内外気切替装置のみならず吹出モード切替機構にも適用することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示す斜視図である。
【図２】図１において矢視Ａによる、送風用ファンの中心で前後に切断した時の内気導入時の断面図である。
【図３】図１において矢視Ａによる、送風用ファンの中心で前後に切断した時の外気導入時の断面図である。
【図４】図１において矢視Ａによる、送風用ファンの中心で前後に切断した時の断面図を示す。
【図５】半円筒状に折り曲げられたフィルタ３Ａのフィルタ部の図を示す。
【図６】本発明の第２実施形態の断面図である。
【図７】本発明の第２実施形態の断面図を示す。
【図８】本発明の第３実施形態を示す斜視図である。
【図９】図８において、矢視方向からみた断面図である。
【図１０】図９のＣ−Ｃ断面図である。
【図１１】本発明の第４実施形態に係る車両空調用内外気切替装置において、送風用ファンの中心で前後に切断した時の内気導入時の断面図である。
【図１２】本発明の第４実施形態に係る車両空調用内外気切替装置において、送風用ファンの中心で前後に切断した時の外気導入時の断面図である。
【図１３】従来の板ドア方式の車両空調用内外気切替装置の断面図である。
【符号の説明】
１…内外気切替ケ−ス、２…回転式ドア、３、３Ａ、３Ｂ…フィルタ、４…送風用ケ−シング、５…送風用ファン、７…内外気切替ケ−ス、８…板ドア、９…フィルタ、１１…外気導入口、１２Ａ…第１内気導入口、１２Ｂ…第２内気導入口、２１…円弧状ドア部、２２…平面ドア部、２３…支持軸、２４…ドア支持部。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inside / outside air switching device for vehicle air conditioning.
[0002]
[Prior art]
Conventionally, in the inside / outside air switching device for vehicle air conditioning, as shown in FIG. 13, the plate filter 9 is arranged so as to be orthogonal to the air flow from the inside air introduction port 72 and the outside air introduction port 71 toward the suction port 102, There is a plate door system that opens and closes the inside air introduction port 72 and the outside air introduction port 71 by rotating the plate door 8.
[0003]
Further, as described in Japanese Utility Model Laid-Open No. 2-17413, a rotary door integrated with a plate-like filter is rotatably arranged so that the filter side becomes the suction port side of the blower fan. There is a rotary door system that opens and closes the inside air introduction port and the outside air introduction port by rotating the.
[0004]
[Problems to be solved by the invention]
In the above-described conventional plate door type vehicle air conditioning inside / outside air switching device, the plate filter 9 is arranged so as to be orthogonal to the air flow from the inside air introduction port 72 and the outside air introduction port 71 toward the suction port 102, When the filter area is increased, there is a problem that the air passage cross section is increased.
[0005]
Further, in the above-described conventional rotary door type vehicle air conditioning inside / outside air switching device, there is a problem that when the filter area is increased, the dimension in the radial direction of the rotary door is increased.
In view of the above points, the present invention does not increase the passage cross section of the air flow from the inside air introduction port and the outside air introduction port toward the suction port of the blower fan, and the rotation radial dimension of the rotary door does not increase. It is an object of the present invention to provide an inside / outside air switching device for vehicle air conditioning that increases the filter area.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention uses the following technical means. In the invention according to any one of claims 1 to 4 , a rotary type that is rotatably arranged in the inside / outside air switching case (1) and opens and closes the inside air introduction ports (12A, 12B) and the outside air introduction port (11). A door (2) and a filter (3) arranged independently of the rotary door (2) are provided downstream of the inside air inlets (12A, 12B) and the outside air inlet (11). And a filter (3) is arrange | positioned so that it may cross | intersect the flow of the air which goes to a suction inlet (42) from an internal air inlet (12A, 12B) and an external air inlet (11), and the said filter (3) It is characterized by having a bent shape.
[0007]
The invention according to claim 1 is characterized in that the filter (3) is bent into a trapezoidal shape or a semicylindrical shape. In the invention described in claim 2, 3, the rotational direction of the rotary door (2), the bending direction of the filter (3), characterized in that the filter is arranged to be orthogonal.
[0008]
In the invention according to claim 4 , the filter (3) is disposed on the air downstream side of the rotary door (2), and the filter (3) is convex toward the rotary door (2) side. It is bent. In the invention according to claim 5, a rotary door (in the inside / outside air switching case (1), which is rotatably arranged and opens / closes the inside air introduction ports (12 A, 12 B) and the outside air introduction port (11)). 2) and a filter (3B) disposed independently of the rotary door (2) on the downstream side of the inside air introduction ports (12A, 12B) and the outside air introduction port (11). And a filter (3B) is arrange | positioned so that it may become diagonal with respect to the flow of the air which goes to a suction inlet (42) from an internal air inlet (12A, 12B) and an external air inlet (11), and multiple internal air inlets are provided. The filter (3B) is arranged on the air upstream side of at least one of the inside air introduction ports (12B) among the plurality of inside air introduction ports (12A, 12B) .
[0009]
According to a sixth aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to any one of the first to fourth aspects, a plurality of inside air introduction ports are provided .
[0010]
The inventions according to claims 7 and 8 are characterized in that the filter (3, 3A, 3B) is disposed between the arcuate door portion (21) and the support shaft (23). According to a ninth aspect of the present invention, in the inside / outside air switching device for vehicle air conditioning according to any one of the first to eighth aspects, an inside air lattice for preventing introduction of dust such as paper waste at the inside air introduction port (12A). (15) is arranged to be removable.
[0011]
According to a tenth aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to the ninth aspect, the inside air lattice (15) is engaged with the claw portion (16) and assembled to the inside / outside air switching case (1). It is characterized by being attached.
According to an eleventh aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to any one of the eighth to tenth aspects, the inside / outside air switching case (1) is a first side surface portion (13) parallel to the door support portion (24). )have. A guide portion (2a) is provided on at least one side of the door support portion (24) or the first side surface portion (13) so as to be in contact with the other side.
[0012]
According to a twelfth aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to the eighth to eleventh aspects, the support shaft (23) comes out of the insertion portion (13a) at the tip of the support shaft (23). A flange portion (23a) for preventing this is formed.
According to a thirteenth aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to the eleventh or twelfth aspect, the inside / outside air switching case (1) has a second side surface portion perpendicular to the first side surface portion (13). (14) is provided, and a filter support portion (43) having a wall surface (43a) parallel to the second side surface portion (14) is formed in the blowing casing (1). The filter (3) is sandwiched and held between the second side surface portion (14) and the filter support portion (43).
[0013]
According to the fourteenth aspect of the present invention, in the inside / outside air switching device for vehicle air conditioning according to the thirteenth aspect, when the rotary door (2) closes the internal air inlet (12A), the rotary door (2) and the filter A seal piece (26) for sealing a gap with the support portion (43) is provided on the inner surface side of the rotary door (2).
According to a fifteenth aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to any one of the first to fourteenth aspects, the rotary door (2) is switched between the inside and outside air via the gear portion (27). It is driven by a motor (28) disposed on the first side surface (13) of the case (1).
[0014]
Next, the effect is described.
According to invention of Claims 1-15, since it comprises the filter (3) arrange | positioned independently with the rotary door (2), it is independent of the rotation radius dimension of a rotary door (2). In addition, the filter area can be increased.
Moreover, since the filter (3) arrange | positioned independently with the rotary door (2) is comprised, the drive torque of a rotary door can be made small compared with the conventional rotary door.
[0015]
According to invention of Claims 1-4, a filter (3) is arrange | positioned so that it may cross | intersect the flow of the air which goes to a suction inlet (42) from an internal air inlet (12A, 12B) and an external air inlet (11). In addition, since the filter (3) has a bent shape, the filter area can be increased as compared with the conventional plate filter without increasing the cross section of the air flow passage.
[0016]
According to invention of Claim 5, a filter (3B) is arrange | positioned so that it may become diagonal with respect to the flow of the air which goes to an inlet (42) from an inside air inlet (12A, 12B) and an outside air inlet (11). Therefore, the filter area can be increased as compared with the conventional plate filter without increasing the cross section of the air flow passage.
According to invention of Claim 7, since the filter (3B) is arrange | positioned in the air upstream side from at least 1 inside air introduction port (12B) among several inside air introduction ports (12A, 12B), At the time of introducing the inside air, part of the introduced air does not pass through the filter (3B), so that the ventilation resistance by the filter (3B) can be reduced, and as a result, the amount of air sucked can be increased.
[0017]
According to the inventions of claims 7 and 8, the rotary door (2) includes an arcuate door portion (21) for opening and closing the inside air introduction ports (12A, 12B) and the outside air introduction port (11), and an arcuate shape. A door support portion (24) coupled at right angles to the axial end of the door portion (21), and a support provided at a portion of the door support portion (24) that serves as a rotation center of the rotary door (2). And the filter (3, 3A, 3B) is disposed between the arcuate door (21) and the support shaft (23), so that the inside air inlets (12A, 12B) and The dimensions from the outside air inlet (11) to the filters (3, 3A, 3B) can be reduced, and as a result, the external dimensions of the apparatus can be further reduced.
[0018]
According to the twelfth aspect of the present invention, since the flange portion (23a) is formed at the distal end portion of the support shaft (23), the support shaft (23) is prevented from coming off from the insertion portion (13a). be able to.
According to the invention described in claim 15, the rotary door (2) has the motor (28) disposed on the first side surface portion (13) of the inside / outside air switching case (1) via the gear portion (27). Therefore, the number of parts can be reduced as compared with the case where the rotary door (2) is driven using a link mechanism or the like. Therefore, the cost of the vehicle air conditioning inside / outside air switching device can be reduced.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described.
(First embodiment)
1 to 5 show this embodiment, and the vehicle air conditioning inside / outside air switching device shown in FIG. 1 is usually arranged on the passenger seat side below the instrument panel at the front of the interior of an automobile, Switch air introduction.
[0020]
Reference numeral 1 denotes a synthetic resin or metal inside / outside air switching case, which is disposed on the suction port 42 side of the blowing case 4 adjacent to the blowing case 4 described later. This inside / outside air switching case 1 has two side-by-side first inside air introduction ports 12A for introducing room air, a second inside air introduction port 12B, and an outside air introduction port 11 for introducing outdoor air. These inside / outside air introduction ports communicate with the suction port 42.
[0021]
The second inside air introduction port 12B is provided on the side surface of the inside / outside air switching case 1 in the rotational direction of the rotary door 2 described later. Further, a U-shaped groove 13 a for supporting the support shaft 23 is provided below the side surface of the inside / outside air switching case 1.
Reference numeral 2 denotes a rotary door made of synthetic resin or metal, which is rotatably arranged in the inside / outside air switching case 1. The arcuate door portion 21 of the rotary door 2 opens and closes the first inside air introduction port 12A and the outside air introduction port 11, and is coupled to the end of the substantially fan-shaped door support portion 24 at a right angle.
[0022]
The door support portion 24 is formed with a guide portion 2a so as to be in contact with the side wall portion 13 parallel to the door support portion 24 of the inside / outside air switching case 1, and the guide portion 2a is a rotary door. As shown in FIG. 1, it is formed in an arc shape in the rotational direction of the rotary door 2 so as to always come into contact with the side wall portion 13 when the inlet port 12A, 12b, 11 is opened and closed by rotating 2 . In addition, you may form this guide part 2a in the side wall part 13. As shown in FIG.
[0023]
Further, the support shaft 23 is provided at a right angle outward at the center of rotation of the substantially fan-shaped door support portion 24. Further, the planar door portion 22 opens and closes the second inside air inlet 12B, and is coupled orthogonally to a stair portion 25 extending from a substantially fan-shaped door support portion 24 at a position rotated by a predetermined amount around the support shaft 23. Has been. As shown in FIG. 4, the rotary door 2 is rotatably inserted into the U-shaped groove 13 a so that the support shaft 23 is lower than the 3 a surface of the filter 3. The support shaft 23 is integrally formed with a flange portion 23 a that prevents the support shaft 23 from coming out of the groove 13 a.
[0024]
Reference numeral 3 denotes a filter, which is composed of a filter portion 32 for removing dust made of corrugated (corrugated) Japanese paper or porous urethane porous, and a frame body 31 forming a synthetic resin or metal frame. . The filter 3 is disposed in the inside / outside air switching case 1 on the air downstream side of the first inside air introduction port 12A, the second inside air introduction port 12B, and the outside air introduction port 11 independently of the rotary door 2. In addition, the rotary door 2 is disposed on the downstream side of the air so as to be orthogonal to the flow of air from the first inside air introduction port 12A, the second inside air introduction port 12B, and the outside air introduction port 11 toward the suction port 42.
[0025]
The filter 3 is bent in a trapezoidal shape so that it protrudes toward the rotary door 2 side, and the bending direction of the filter 3 and the rotation direction of the rotary door 2 are orthogonal to each other. Both sides are bent.
Reference numeral 4 denotes a synthetic resin or metal scroll-like blowing casing. The blowing casing 4 has a first inside air inlet 12A and a second inside air inlet at the center of the scroll. 12B and the inlet 42 which opens toward the external air inlet 11 direction are formed. A discharge port 41 that opens in the tangential direction is formed at the end of the scroll of the blowing casing 4, and an air flow path from the suction port 42 to the discharge port 41 is formed. . A bell mouth is formed on the outer edge of the suction port 42.
[0026]
Further, a centrifugal multiblade fan (sirocco fan) and a motor 6 for driving the blower fan 5 are arranged in the blower casing 4 as the blower fan 5.
The filter 3 is disposed on the suction port 42 side and is detachably attached to the blowing casing 4. Further, the inside / outside air switching case 1 and the blowing case 4 are coupled by a bolt, a claw fitting or a C-shaped clamp (fitting spring) fixed by elastic force.
[0027]
Next, the operation of this embodiment will be described.
Switching between inside air introduction and outside air introduction is performed by rotation of the rotary door 2 about the support shaft 23. At this time, the arcuate door portion 21 of the rotary door 2 opens and closes the first inside air introduction port 12A and the outside air introduction port 11, and the flat door portion 22 opens and closes the second inside air introduction port 12B.
[0028]
When the inside air is introduced, the rotary door 2 is located as shown in FIG. 2, and air is introduced from the inside air introduction ports 12 A and 12 B, passes through the filter 3, and is sucked from the suction port 42 and discharged from the discharge port 41. The
When the outside air is introduced, the rotary door 2 is in a position as shown in FIG. 3. Air is introduced from the outside air introduction port 11, passes through the filter 3, is sucked from the suction port 42, and is discharged from the discharge port 41. The
[0029]
Next, features of this embodiment will be described.
Since the filter 3 disposed independently of the rotary door 2 is provided, the filter area can be increased independently of the radius of rotation of the rotary door 2.
Similarly, since the filter 3 disposed independently of the rotary door 2 is provided, the driving torque of the rotary door can be reduced as compared with the conventional rotary door.
[0030]
Moreover, since the filter 3 is bent in a trapezoidal shape, the expansion of the width and depth dimensions of the device can be suppressed, and the filter area can be increased as compared with a conventional plate filter.
Further, since the 3a surface of the filter 3 is disposed between the arcuate door portion 21 and the support shaft 23 (see FIG. 4), the 3a surface of the filter 3 and the first inside air introduction port 12A and the outside air introduction port 11 are connected. The distance can be reduced and, as a result, the height dimension of the device can be reduced.
[0031]
Furthermore, since there are no movable parts (support shaft 23 and door support part 24) in the air passage after passing through the filter, mixing of unpurified air that does not pass through the filter is prevented compared to the conventional rotary door system (sealing). Enhancing the property).
Moreover, since the guide part 2a formed in the door support part 24 is in contact with the side wall 13 of the inside / outside air switching case 1, deformation of the rotary door 2 in the direction of the rotary shaft 23 is suppressed. Therefore, since the expansion of the gap between the arcuate door portion 21 of the rotary door 2 and each of the inlets 12A, 12B, 11 is suppressed, the deterioration of the sealing performance at each of the inlets 12A, 12B, 11 is suppressed. Can do.
[0032]
(Second Embodiment)
6 and 7 show the second embodiment. Instead of the filter 3 bent into a trapezoidal shape in the first embodiment, a plate-like filter 3B is used, and this filter 3B has an air flow as shown in FIG. It arrange | positions so that it may become diagonal with respect to a channel | path cross section. The filter 3B is fixed to the blowing casing 4 by a stage or the like (not shown) so as to be on the air upstream side from the inside air inlet 12B.
[0033]
As shown in FIG. 6, the filter 3B is disposed so as to be inclined with respect to the cross section of the air flow passage, so that the width and depth of the device are not increased, and the filter area is larger than that of a conventional plate filter. Can be increased.
Further, since the filter 3B has a flat plate shape, the filter 3B is easier to manufacture than the filter 3 bent into a trapezoidal shape in the first embodiment.
[0034]
Further, when the inside air is introduced, the rotary door 2 is in a position as shown in FIG. 6, and the air introduced from the inside air introduction port 12A is sucked from the suction port 42 after passing through the filter 3B and discharged from the discharge port 41. The Further, the air introduced from the inside air introduction port 12B is directly sucked from the suction port 42 without passing through the filter 3B and is discharged from the discharge port 41. As a result, it is possible to reduce the ventilation resistance by the filter 3B, and to increase the intake amount of the inside air. In addition, when the outside air is introduced, it is the same as the first embodiment (see FIG. 3).
[0035]
Incidentally, in the first embodiment, the semicircular filter 3A shown in FIG. 5 may be used instead of the filter 3 bent into a trapezoidal shape.
In the first embodiment, the filters 3, 3 A are arranged so that the bending direction thereof is orthogonal to the rotation direction of the rotary door 2, but the bending direction of the filters 3, 3 A and the rotary door 2 You may arrange | position so that a rotation direction may become the same direction.
[0036]
Furthermore, the present invention can be implemented even if the filters 3 and 3A are arranged so as to protrude toward the suction port 42.
(Third embodiment)
This embodiment considers the detachability of the filter in addition to the above-described embodiment. That is, as shown in FIG. 8, the second inside air introduction port 12B is formed in the side wall portion 13 of the inside / outside air switching case 1 so that the filter 3 can be detached from the first inside air introduction port 12A.
[0037]
As shown in FIG. 9, the filter 3 is formed in a rectangular shape when viewed from the air flow direction, opposes the first inside air introduction port 12 A in the inside / outside air switching case 1, and supports the support portion 24. Is in contact with the wall surface 14 at right angles. Further, a filter support portion 43 having a wall surface 43 a parallel to the wall surface 14 is formed in the blower casing 4, and the filter 3 is sandwiched and held between the filter support portion 43 and the wall surface 14. Yes.
[0038]
When removing the filter 3, the part of the filter 3 that is in contact with the filter support 43 is moved in the direction of the outside air inlet 11 (upward in FIG. 8), and the filter 3 is moved while maintaining this state. 1 Take out from the inside air inlet 12A.
Incidentally, an internal air grid 15 for preventing introduction of dust such as paper waste is detachably disposed at the first internal air introduction port 12A. When the filter 3 is detached, the filter 3 is removed after the internal air grid 15 is detached. Desorption of. The inside air lattice 15 is engaged with the inside / outside air switching case 1 by being locked to a claw portion 16 formed at the outer edge of the first inside air introduction port 12A.
[0039]
Further, as shown in FIG. 10, a seal piece 26 made of resin or rubber is provided inside the rotary door 2, and the seal piece 26 is connected to the first indoor air inlet 12 A by the rotary door 2. It is arranged so as to contact the filter support 43 when closed. Accordingly, since the gap between the filter support portion 43 and the rotary door 2 is sealed by the seal piece 26, when the outside air introduction port 11 is opened (when the first inside air introduction port 12A is closed), the outside air introduction port 11 is opened. All the outside air introduced from the air passes through the filter 3.
[0040]
(Fourth embodiment)
In the present embodiment, driving means for the rotary door 2 is considered.
That is, as shown in FIGS. 11 and 12, an arcuate gear portion 27 is integrally formed from the door support portion 24 to the stay portion 25 along the rotational direction of the rotary door 2, and the side wall 13 of the inside / outside air switching case 1 is formed. A drive motor 28 is disposed on the side.
[0041]
A worm gear 29 is press-fitted into the rotation shaft of the driving motor 28, and the driving force of the driving motor 28 is transmitted to the gear portion 27 via the spur gear 30 and the worm gear 29 that mesh with the worm gear 29. Is transmitted to.
With the configuration described above, the number of parts can be reduced as compared with the case where the rotary door 2 is driven using a link mechanism.
[0042]
By the way, the gear part 27 which concerns on this embodiment may be provided only in the stay part 25, and may be formed separately and adhere | attached on the rotary door 2. FIG. Further, the gear portion 27 may be formed in a circumferential shape. Furthermore, the guide part 2a and the gear part 27 may be shared. Further, the driving means according to the present embodiment can be applied not only to the inside / outside air switching device but also to the blowing mode switching mechanism.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view when introducing the inside air when cut back and forth at the center of the blower fan, as seen from arrow A in FIG.
FIG. 3 is a cross-sectional view when the outside air is introduced when it is cut back and forth at the center of the blower fan, as viewed from the direction of arrow A in FIG. 1;
4 shows a cross-sectional view of the blower fan cut back and forth at the center of the blower fan, as viewed from the direction of arrow A in FIG.
FIG. 5 shows a view of the filter portion of the filter 3A bent into a semi-cylindrical shape.
FIG. 6 is a cross-sectional view of a second embodiment of the present invention.
FIG. 7 shows a cross-sectional view of a second embodiment of the present invention.
FIG. 8 is a perspective view showing a third embodiment of the present invention.
FIG. 9 is a cross-sectional view seen from the direction of the arrow in FIG.
10 is a cross-sectional view taken along the line CC of FIG.
FIG. 11 is a cross-sectional view of the inside / outside air switching device for air conditioning according to the fourth embodiment of the present invention when the inside air is introduced when it is cut back and forth at the center of the blower fan.
FIG. 12 is a cross-sectional view of the air conditioning inside / outside air switching device according to the fourth embodiment of the present invention when the outside air is introduced when the air blower is cut back and forth at the center of the blower fan.
FIG. 13 is a cross-sectional view of a conventional plate door type vehicle air conditioning inside / outside air switching device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Inside / outside air switching case, 2 ... Rotary door, 3, 3A, 3B ... Filter, 4 ... Blower case, 5 ... Blower fan, 7 ... Inside / outside air switching case, 8 ... Plate door , 9 ... Filter, 11 ... Outside air introduction port, 12A ... First inside air introduction port, 12B ... Second inside air introduction port, 21 ... Arc door portion, 22 ... Flat door portion, 23 ... Support shaft, 24 ... Door support portion .

Claims

A blower fan (5);
The blower fan (5) is housed, and has a suction port (42) on the upstream side of the blower fan (5) and a discharge port (41) on the downstream side, and is sucked from the suction port (42). A blowing casing (4) that forms a flow path for guiding the air to the discharge port (41);
An inside / outside air switching case (1) having an inside air introduction port (12A, 12B) and an outside air introduction port (11) arranged adjacent to the upstream side of the suction port (42) and communicating with the suction port (42). )When,
A rotary door (2) that is rotatably arranged in the inside / outside air switching case (1) and opens and closes the inside air introduction ports (12A, 12B) and the outside air introduction port (11);
In the inside / outside air switching case (1), a filter (12A, 12B) and a filter disposed downstream of the outside air introduction port (11) and independently of the rotary door (2) ( 3)
The filter (3) is arranged so as to intersect the flow of air from the inside air inlets (12A, 12B) and the outside air inlet (11) toward the suction port (42), and the filter (3) Is a trapezoidal shape or a shape bent into a semi-cylindrical shape .

2. The vehicle air conditioning inside / outside air switching according to claim 1 , wherein the filter is arranged so that a bending direction of the filter (3) is orthogonal to a rotation direction of the rotary door (2). apparatus.

A blower fan (5);
The blower fan (5) is housed, and has a suction port (42) on the upstream side of the blower fan (5) and a discharge port (41) on the downstream side, and is sucked from the suction port (42). A blowing casing (4) that forms a flow path for guiding the air to the discharge port (41);
An inside / outside air switching case (1) having an inside air introduction port (12A, 12B) and an outside air introduction port (11) arranged adjacent to the upstream side of the suction port (42) and communicating with the suction port (42). )When,
A rotary door (2) that is rotatably arranged in the inside / outside air switching case (1) and opens and closes the inside air introduction ports (12A, 12B) and the outside air introduction port (11);
In the inside / outside air switching case (1), a filter (12A, 12B) and a filter disposed downstream of the outside air introduction port (11) and independently of the rotary door (2) ( 3)
The filter (3) is arranged so as to intersect the flow of air from the inside air inlets (12A, 12B) and the outside air inlet (11) toward the suction port (42), and the filter (3) Has a bent shape,
It said rotary door (2) with respect to the direction of rotation of the filter (3) in the bending direction in the outside air switching device for vehicle air conditioning you, wherein the filter is arranged to be orthogonal.

The filter (3) is disposed on the air downstream side of the rotary door (2), and the filter (3) is bent so as to protrude toward the rotary door (2). The inside / outside air switching device for vehicle air conditioning according to any one of claims 1 to 3.

A blower fan (5);
The blower fan (5) is housed, and has a suction port (42) on the upstream side of the blower fan (5) and a discharge port (41) on the downstream side, and is sucked from the suction port (42). A blowing casing (4) that forms a flow path for guiding the air to the discharge port (41);
An inside / outside air switching case (1) having an inside air introduction port (12A, 12B) and an outside air introduction port (11) arranged adjacent to the upstream side of the suction port (42) and communicating with the suction port (42). )When,
A rotary door (2) that is rotatably arranged in the inside / outside air switching case (1) and opens and closes the inside air introduction ports (12A, 12B) and the outside air introduction port (11);
In the inside / outside air switching case (2), a filter (12A, 12B) and a filter disposed downstream of the outside air introduction port (11) independently of the rotary door (2) ( 3B)
The filter (3B) is disposed so as to be inclined with respect to the flow of air from the inside air introduction port (12A, 12B) and the outside air introduction port (11) toward the suction port (42) ,
A plurality of the inside air introduction ports are provided, and the filter (3B) is disposed on the air upstream side of at least one inside air introduction port (12B) among the plurality of inside air introduction ports (12A, 12B). An inside / outside air switching device for vehicle air conditioning.

The inside / outside air switching device for vehicle air conditioning according to any one of claims 1 to 4 , wherein a plurality of the inside air introduction ports are provided.

A blower fan (5);
The blower fan (5) is housed, and has a suction port (42) on the upstream side of the blower fan (5) and a discharge port (41) on the downstream side, and is sucked from the suction port (42). A blowing casing (4) that forms a flow path for guiding the air to the discharge port (41);
An inside / outside air switching case (1) having an inside air introduction port (12A, 12B) and an outside air introduction port (11) arranged adjacent to the upstream side of the suction port (42) and communicating with the suction port (42). )When,
A rotary door (2) that is rotatably arranged in the inside / outside air switching case (1) and opens and closes the inside air introduction ports (12A, 12B) and the outside air introduction port (11);
In the inside / outside air switching case (1), a filter (12A, 12B) and a filter disposed downstream of the outside air introduction port (11) and independently of the rotary door (2) ( 3)
The filter (3) is arranged so as to intersect the flow of air from the inside air inlets (12A, 12B) and the outside air inlet (11) toward the suction port (42), and the filter (3) Has a bent shape,
The rotary door (2) includes an arcuate door portion (21) for opening and closing the inside air introduction ports (12A, 12B) and the outside air introduction port (11), and an axial direction of the arcuate door portion (21). A door support portion (24) coupled to the end portion at a right angle, and a support shaft (23) provided at a portion of the door support portion (24) serving as a rotation center of the rotary door (2). And
A vehicle air conditioning inside / outside air switching device, wherein the filter (3) is disposed between the arcuate door portion (21) and the support shaft (23) .

The rotary door (2) includes an arcuate door portion (21) for opening and closing the inside air introduction ports (12A, 12B) and the outside air introduction port (11), and an axial direction of the arcuate door portion (21). A door support portion (24) coupled to the end portion at a right angle, and a support shaft (23) provided at a portion of the door support portion (24) serving as a rotation center of the rotary door (2). And
Said filter (3, 3A, 3B) is according to any one of claims 1 to 6, characterized in that disposed between the arcuate door portion (21) and said support shaft (23) Inside / outside air switching device for vehicle air conditioning.

9. The internal air inlet (12 A) is provided with an internal air grid (15) that prevents introduction of dust such as paper scraps so as to be detachable. 9. Inside / outside air switching device for vehicle air conditioning.

A claw portion (16) is formed on the outer edge portion of the inside air inlet (12A),
The inside / outside air switching for vehicle air conditioning according to claim 9, wherein the inside air lattice (15) is engaged with the inside / outside air switching case (1) by being locked to the claw portion (16). apparatus.

The inside / outside air switching case (1) has a first side surface portion (13) parallel to the door support portion (24),
The guide part (2a) in contact with the other side is provided on at least one side of the door support part (24) or the first side surface part (13). Inside / outside air switching device for vehicle air conditioning.

An insertion portion (13a) into which the support shaft (23) of the rotary door (2) is inserted is formed in the first side surface portion (13), and the tip portion of the support shaft (23) 12. The inside / outside air switching device for vehicle air conditioning according to claim 8, further comprising a flange portion (23a) for preventing the support shaft (23) from coming off from the insertion portion (13a).

The filter (3) is formed in a rectangular shape when viewed from the air flow direction,
The inside / outside air switching case (1) has a second side surface portion (14) provided at a right angle to the first side surface portion (13),
In the blowing casing (1), a filter support portion (43) having a wall surface (43a) parallel to the second side surface portion (14) is formed,
13. The vehicle air conditioner according to claim 11 or 12, wherein the filter (3) is sandwiched and held between the second side surface portion (14) and the filter support portion (43). Inside / outside air switching device.

The inside air inlet (12A) and the outside air inlet (11) are provided side by side in the rotational direction of the rotary door (2),
The second side surface portion (14) is on the outside air introduction port (11) side, and the filter support portion (43) is formed on the inside air introduction port (12A) side,
When the rotary door (2) closes the inside air inlet (12A), a seal piece (26) that seals a gap between the rotary door (2) and the filter support (43) 14. The inside / outside air switching device for vehicle air conditioning according to claim 13, wherein the inside / outside air switching device is provided on an inner surface side of the type door (2).

A gear part (27) is formed on the door support part (24) of the rotary door (2),
The rotary door (2) is driven by a motor (28) disposed on the first side surface (13) of the inside / outside air switching case (1) via the gear portion (27). The inside / outside air switching device for vehicle air conditioning according to any one of claims 1 to 14.