JP3629767B2

JP3629767B2 - Inside / outside air switching device for vehicle air conditioning

Info

Publication number: JP3629767B2
Application number: JP23660795A
Authority: JP
Inventors: 健司諏訪; 四方　　一史
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 1995-09-14
Filing date: 1995-09-14
Publication date: 2005-03-16
Anticipated expiration: 2015-09-14
Also published as: JPH0976725A

Description

【０００１】
【産業上の利用分野】
本発明は、内外気切替用ドアとして回転式ドア（ロータリ式ドア）を用いた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】
従来から、車両空調用内外気切替装置には、車室内空気浄化のために空気の塵埃等を取り除くフィルタが設けられている。そして、このフィルタの構造としては、実開平５−８２６２１号公報に記載のように、フィルタが枠体によって保持される構造のものが挙げられる。
【０００３】
その一例として、図１１に示すように、波形状に形成した剛性の低い濾紙などからなるフィルタ部３１を上下から枠体３１ａで挟み、枠体３１ａによって剛性を向上させたフィルタが挙げられる。
【０００４】
【発明が解決しようとする課題】
ところで、フィルタの製造原価のうち、枠体３１ａのコストが占める割合が大きく、製造原価低減という観点から、枠体３１ａを廃止した簡略な構造を有するフィルタの要望がある。
そこで、発明者等は、枠体を廃止し、フィルタ部の側面側にウレタンフォームやゴム等の弾性体からなるパッキンを接着することにより、構造を簡略化して製造原価の低減を図ったフィルタを試作した。
【０００５】
しかし、試作のフィルタは、枠体３１ａを廃止したためにフィルタの剛性が低く、湿度若しくは温度変化等の影響による膨張収縮により、空気流れの上流側あるいは下流側方向にフィルタがたわみ変形し易いという問題を有していた。
本発明は、上記点に鑑み、枠体のない簡略な構造を有するフィルタとしてフィルタの製造原価低減を図りつつ、フィルタのたわみ変形の抑制を図ることを目的とする。
【０００６】
【発明の概要】
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に記載の発明では、内外気切替ケ−ス（１）内に配置されたフィルタ（３）は、フィルタ（３）の空気下流側に接してフィルタ（３）を支持する支持部材（４３）と、フィルタ（３）の空気上流側に接する回転式ドア（２）の補強部材（２６、２７、２８）とによって支持されていることを特徴とする。
【０００７】
請求項２に記載の発明では、請求項１に記載の車両空調用内外気切替装置において、フィルタ（３）は、複数の折り曲げ部（３５）を有するように波形状に折り曲げ形成された濾紙から構成されている。そして、支持部材（４３）は、フィルタ（３）の空気下流側の複数の折り曲げ部（３５）に接してフィルタ（３）を支持おり、補強部材（２６、２７、２８）は、フィルタ（３）の空気上流側の複数の折り曲げ部（３３）に所定の角度で交差して接するように構成されていることを特徴とする。
【０００８】
請求項３に記載の発明では、請求項２に記載の車両空調用内外気切替装置において、補強部材（２６、２７）は、第１補強部材（２６）および第２補強部材（２７）の２本の補強部材から構成されている。
そして、回転式ドア（２）が内気導入口（１２Ａ、１２Ｂ）を開口させた状態では、第１補強部材（２６）がフィルタの空気上流側の折り曲げ部（３３）と接し、回転式ドア（２）が外気導入口（１１）を開口させた状態では、第２補強部材（２７）がフィルタの空気上流側の折り曲げ部（３３）と接するように構成されていることを特徴とする。
【０００９】
請求項４に記載の発明では、請求項２に記載の車両空調用内外気切替装置において、補強部材（２８）は、１本の補強部材から構成され、その補強部材（２８）のうち、支持軸（２３）に平行な部分の軸方向に直角な断面形状は、空気下流方向を凸として、くの字状に形成されている。
そして、回転式ドア（２）が内気導入口（１２Ａ、１２Ｂ）を開口させた状態では、断面くの字を形成する一の稜線側面（２８ａ）が、フィルタ（３）の空気上流側の折り曲げ部（３３）に接し、回転式ドア（２）が外気導入口（１１）を開口させた状態では、断面くの字を形成する他の稜線側面（２８ｂ）が、フィルタ（３）の空気上流側の折り曲げ部（３３）に接するように構成されていることを特徴とする。
【００１０】
次に、作用効果を述べる。
請求項１〜４に記載の発明によれば、フィルタ３の空気上流側からは、補強部材（２６、２７、２８）が接することにより押さえられており、フィルタ３の空気下流側からは、支持部材（４３）が接することによって押さえられているので、湿度や温度変化等によるフィルタ３のたわに変形を抑制することができる。
【００１１】
また、濾紙でからなるフィルタ（３）の剛性不足を補う枠体を有しない簡略な構造なので、フィルタ（３）の製造原価の低減を図ることができる。
また、空気上流側からフィルタ（３）を押さえる押さえ部材として、回転式ドア（２）の補強部材（２６、２７、２８）を利用しているので、新たに押さえ部材を設ける必要がなく、車両空調用内外気切替装置の原価上昇を抑制しながら簡便にフィルタ（３）のたわに変形を抑制することができる。
【００１２】
請求項２に記載の発明によれば、フィルタ３は、複数の折り曲げ部（３５）を有するように波形状に折り曲げ形成されているので、折り曲げ部（３５）に対して直角方向については、折り曲げ部（３５）によってフィルタ３の剛性を確保することができる。また、補強部材（２６、２７、２８）は、フィルタ（３）の空気上流側の複数の折り曲げ部（３３）に所定の角度で交差して接するように構成されているので、折り曲げ部（３３）に対して平行な方向についても、補強部材（２６、２７、２８）によってフィルタ３の剛性を確保することができる。したがって、フィルタ３の剛性をさらに高めることができる。
【００１３】
請求項４に記載の発明によれば、補強部材が１本なので、請求項２に記載の回転式ドア（２）に比べて、回転式ドアの製造原価低減を図ることができる。延いては、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。
また、補強部材の本数が減少したことにより、両導入口（１１、１２Ａ、１２Ｂ）から導入された空気の流路内抵抗が小さくなるので、空気の吸入抵抗が小さくなり、補強部材を２本有するものに比べて、空気の吸入量が増加する。延いては、補強部材を２本有するものに比べて、空調能力の向上を図ることができる。
【００１４】
【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は第１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。
【００１５】
１は合成樹脂製の内外気切替ケ−スで、この内外気切替ケ−ス１は、室内空気を導入する第１内気導入口１２Ａ、第２内気導入口１２Ｂおよび室外空気を導入する外気導入口１１を有している。
２は回転式ドアで、内外気切替ケ−ス１内に回転可能に配置されている。この回転式ドア２は、図２、３に示すよう、第１内気導入口１２Ａおよび外気導入口１１の開閉を行う円弧状ドア部２１と、この円弧状ドア部２１の軸方向両端側に直角に結合された略扇形のドア支持部２４と、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た支持軸２３とから構成されている。
【００１６】
この支持軸２３は、内外気切替ケ−ス１の側面下方に設けられたＵ字形の溝１３にて、回転可能に支持されており、図２、３に示すように、Ｕ字形の溝１３は、支持軸２３を内外気切替ケ−ス１に装着した状態で、以下に述べるフィルタ３の空気下流側面３ａより低くなるような位置に形成されている。
また、ドア支持部２４の周方向端部から支持軸２３を中心に所定量回転した位置まで伸びたステ−部２５の先端には、第２内気導入口１２Ｂの開閉を行う平面ドア部２２が、ステ−部２５に直交して結合されている。
【００１７】
さらに、回転式ドア２の内側には、図１に示すように、両ドア支持部２４をわたすように支持軸２３に平行に、第１補強部材２６および第２補強部材２７が設けられている。なお、円弧状ドア部２１、平面ドア２２、支持軸２３、ドア支持部２４、第１補強部材２６および第２補強部材２７は、合成樹脂にて一体成形されている。
【００１８】
以上の構造より、回転式ドア２は、支持軸２３を回転中心として回転することによって、第１内気導入口１２Ａおよび外気導入口１１と第２内気導入口１２Ｂとを開閉する。このため、両内気導入口１２Ａ、１２Ｂおよび外気導入口１１は、回転式ドア２の回転方向に直列に並んでいる。因みに、第２内気導入口１２Ｂは、内外気切替ケ−ス１の側面に位置している。
【００１９】
３はフィルタで、図４に示すように、コルゲ−ト（波形）状に形成された濾紙製の塵埃を取り除くフィルタ部３１と、ウレタンフォームまたはゴム等のパッキン３２とから構成されてり、このパッキン３２は、折り曲げ部３３方向両端側に接着されている。そして、このフィルタ３は、図１〜３に示すように、円弧状ドア部２１と、以下に述べる送風用ケ−シング４の吸入口４２との間に配置されている。
【００２０】
また、フィルタ３は、円弧状ドア部２１より空気下流側に配置され、かつ、その空気上流側の折り曲げ部３３方向が、第１および第２補強部材２６、２７と直交するように配置されている。さらに、フィルタ３は、円弧状ドア部２１側に向かって凸となるように、折り曲げ部３３方向に平行な両側面側を折り曲げて台形状に形成されている。
【００２１】
そして、図４に示すように、硬化した接着剤３４によって各々の折り曲げ部３３が繋っており、この接着剤３４およびパッキン３２により、フィルタ３の剛性の向上が図られている。
ところで、図１〜３に示すように、第１および第２補強部材２６、２７のいずれか一方は、フィルタ３の空気上流側の全ての折り曲げ部３３に接しており、第１および第２補強部材２６、２７のフィルタ３に接する部位の形状は、フィルタ３の台形状に沿うように台形状に（図９参照）形成されている。
【００２２】
４は合成樹脂製のスクロ−ル状の送風用ケ−シングで、この送風用ケ−シング４は、そのスクロ−ルの中心で外気導入口１１方向に開口したベルマウスを有する吸入口４２と、スクロ−ルの端に接線方向に向かって開口した吐出口４１とを有している。そして、吸入口４２から吐出口４１まで至る空気の流路を形成している。
【００２３】
また、送風用ケ−シング４の吸入口４２側には、フィルタ３の空気下流側の折り曲げ部３５に接してフィルタ３を支持する支持部材４３が、送風用ケ−シング４と共に一体成形されており、この支持部材４３は、図５に示すように、吸入口４２の空気上流側で交差するように構成されている。なお、送風用ケ−シング４には、フィルタ３の折り曲げ部を支持する支持リブ４４（図９参照）が一体に成形されている。
【００２４】
また、図１〜３に示すように、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、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）を用いて結合されている。
【００２５】
次に、本実施形態の動作を説明する。
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および外気導入口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。
【００２６】
内気導入時は、図２に示すように、回転式ドア２は紙面右側の位置にあり、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。このとき、第１補強部材２６は、フィルタ３の空気上流側の折り曲げ部３３に接している。因みに、第２補強部材２７は、フィルタ３に接していない。
【００２７】
また、外気導入時では、図３に示すように、回転式ドア２は紙面左側の位置にあり、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。このとき、第２補強部材２７は、フィルタ３の空気上流側の折り曲げ部３３に接している。因みに、第１補強部材２６は、フィルタ３に接していない。
【００２８】
次に、本実施形態の特徴を述べる。
フィルタ３には、図４に示すように、フィルタ部３１の剛性不足を補う枠体（図１０参照）を有しない簡略な構造なので、フィルタ３の製造原価の低減を図ることができる。
また、フィルタ３は、複数の折り曲げ部を有するように波形状に折り曲げ形成されているので、折り曲げ部に対して直角方向については、折り曲げ部によって剛性を確保することができる。そして、第１および第２補強部材２６、２７は、フィルタ３の空気上流側の複数の折り曲げ部３３に直交して接するように構成されているので、折り曲げ部３３に対して平行な方向についても、第１および第２補強部材２６、２７によってフィルタ３の剛性を確保することができる。したがって、フィルタ３の湿度や温度変化等による空気上流方向のたわみ変形を抑制することができる。
【００２９】
また、空気下流側の折り曲げ部３５側からは、支持部材４３が接することによって押さえられているので、空気流れによる空気下流方向たわみ変形を抑制することができる。
また、空気上流側の折り曲げ部３３からフィルタ３を押さえる押さえ部材として、回転式ドア２の第１、第２補強部材２６、２７を利用しているので、新たに押さえ部材を設ける必要がなく、車両空調用内外気切替装置の原価上昇を抑制しながら簡便にフィルタ３たわに変形を抑制することができる。
【００３０】
（第２実施形態）
本実施形態は、第１実施形態において２本設けられていた補強部材を１本として、さらに車両空調用内外気切替装置の原価低減を図ったものである。
その構造は、図６に示すように、回転式ドア２の両ドア支持部２４をわたすように支持軸２３に平行に、１本の補強部材２８を設けたものである。この補強部材２８のうち、支持軸２３に平行な部分の軸方向に直角な断面形状は、図７に示すように、空気下流方向を凸として、くの字状に形成されている。
【００３１】
また、図９に示すように、フィルタ３の折り曲げ部を支持する支持リブ４４が送風用ケーシング４と一体に形成されている。
次に、作動を述べる。
内気導入時は、図７に示すように、回転式ドア２は紙面右側の位置にあり、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。このとき、補強部材２８の断面くの字を形成する一の稜線側面２８ａが、フィルタ３の空気上流側の折り曲げ部３３に接し接している。
【００３２】
また、外気導入時では、図８に示すように、回転式ドア２は紙面左側の位置にあり、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。このとき、補強部材２８の断面くの字を形成する他の稜線側面２８ｂが、フィルタ３の空気上流側の折り曲げ部３３に接している。なお、図９は、内気導入時における図６のＢ方向半断面図を示している。
【００３３】
次に、本実施形態の特徴を述べる。
補強部材が１本なので、補強部材を２本有する回転式ドアに比べて、形状が簡単になるので、成形用金型の制作費の低減および成形性が容易になり、回転式ドアの製造原価低減を図ることができる。延いては、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。
【００３４】
また、補強部材の本数が減少したことにより、両導入口１１、１２Ａ、１２Ｂから導入された空気の流路内抵抗が小さくなるので、空気の吸入抵抗が小さくなり、補強部材を２本有するものに比べて、空気の吸入量が増加する。延いては、補強部材を２本有するものに比べて、空調能力の向上を図ることができる。
（第３実施形態）
本実施形態は、第２実施形態をさらに発展させたもので、補強部材２８と回転式ドア２の支持軸２３とを共用させたものである。
【００３５】
その構造は、図１０に示すように、支持軸２９が、両ドア支持部２４を貫通しており、両ドア支持部２４をわたっている部分が補強部材２９ａを構成している。そして、この補強部材２９ａが、常時、フィルタ３の空気上流側の折り曲げ部３３に接している。
ところで、図１０から明らかなように、第１および第２実施形態と異なり、支持軸２９がフィルタ３の空気上流側面３ｂより空気上流側に位置し、さらに、フィルタ３の形状は平板状に形成されている。
【００３６】
次に、本実施形態の特徴を述べる。
補強部材２９ａが、常時、フィルタ３の空気上流側の屈曲部３３に接しているので、フィルタ３の支持を確実に行うことができる。
なお、フィルタ３のフィルタ部３１は、波形状に限定されるものではなく、平板状のものを用いても本発明を実施することができる。
【図面の簡単な説明】
【図１】本発明に係る第１実施形態の全体斜視図である。
【図２】本実施形態に係る内気導入状態を示す図１のＡ方向半断面図である。
【図３】本実施形態に係る外気導入状態を示す図１のＡ方向半断面図である。
【図４】フィルタを示す斜視図である。
【図５】図２におけるＣ−Ｃ断面図である。
【図６】本発明に係る第２実施形態の全体斜視図である。
【図７】本実施形態に係る内気導入状態を示す図６のＡ方向半断面図である。
【図８】本実施形態に係る外気導入状態を示す図６のＡ方向半断面図である。
【図９】図７のＢ方向半断面図である。
【図１０】本発明の第３実施形態に係るＢ方向半断面図である。
【図１１】従来技術に係るフィルタを示す斜視図である。
【符号の説明】
１…内外気切替ケ−ス、２…回転式ドア、３…フィルタ、
４…送風用ケ−シング、５…送風用ファン、
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、２５…ステー部、
２６、２７、２８、２９…補強部材、
３１…フィルタ部、３２…パッキン、３４…接着剤、４１…吐出口、
４２…吸入口、４３…支持部材、４４…支持リブ。[0001]
[Industrial application fields]
The present invention relates to a vehicle air conditioning inside / outside air switching device using a rotary door (rotary door) as an inside / outside air switching door.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a vehicle air-conditioning inside / outside air switching device has been provided with a filter that removes dust and the like of air in order to purify the air in the passenger compartment. And as a structure of this filter, the thing of the structure where a filter is hold | maintained by a frame is mentioned as described in Japanese Utility Model Laid-Open No. 5-82621.
[0003]
As an example, as shown in FIG. 11, a filter in which a filter portion 31 made of filter paper or the like having a low rigidity formed in a wave shape is sandwiched from above and below by a frame body 31 a and the rigidity is improved by the frame body 31 a can be mentioned.
[0004]
[Problems to be solved by the invention]
By the way, the ratio of the cost of the frame 31a to the manufacturing cost of the filter is large, and there is a demand for a filter having a simple structure in which the frame 31a is eliminated from the viewpoint of reducing the manufacturing cost.
Therefore, the inventors abolished the frame and bonded a packing made of an elastic material such as urethane foam or rubber to the side surface of the filter portion, thereby simplifying the structure and reducing the manufacturing cost. Prototype.
[0005]
However, the prototype filter has a problem that the rigidity of the filter is low because the frame 31a is eliminated, and the filter is easily deformed in the upstream or downstream direction of the air flow due to expansion or contraction due to the influence of humidity or temperature change. Had.
An object of this invention is to aim at suppression of the deformation deformation of a filter, aiming at reduction of the manufacturing cost of a filter as a filter which has a simple structure without a frame body in view of the said point.
[0006]
SUMMARY OF THE INVENTION
In order to achieve the above object, the present invention uses the following technical means.
In the first aspect of the present invention, the filter (3) disposed in the inside / outside air switching case (1) is in contact with the downstream side of the filter (3) and supports the filter (3). 43) and the reinforcing member (26, 27, 28) of the rotary door (2) in contact with the air upstream side of the filter (3).
[0007]
According to a second aspect of the present invention, in the vehicle air-conditioning inside / outside air switching device according to the first aspect, the filter (3) is formed from a filter paper that is bent into a wave shape so as to have a plurality of bent portions (35). It is configured. The support member (43) is in contact with the plurality of bent portions (35) on the air downstream side of the filter (3) to support the filter (3), and the reinforcing members (26, 27, 28) are the filter (3 ), A plurality of bent portions (33) on the upstream side of the air are crossed and contacted at a predetermined angle.
[0008]
According to a third aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to the second aspect, the reinforcing members (26, 27) are two of the first reinforcing member (26) and the second reinforcing member (27). It is comprised from the reinforcement member of a book.
When the rotary door (2) opens the inside air inlets (12A, 12B), the first reinforcing member (26) is in contact with the bent portion (33) on the air upstream side of the filter, and the rotary door ( In the state where 2) the outside air inlet (11) is opened, the second reinforcing member (27) is configured to be in contact with the bent portion (33) on the air upstream side of the filter.
[0009]
According to a fourth aspect of the present invention, in the vehicle air conditioning inside / outside air switching device according to the second aspect, the reinforcing member (28) is composed of a single reinforcing member, and among the reinforcing members (28), the supporting member is supported. The cross-sectional shape perpendicular to the axial direction of the portion parallel to the axis (23) is formed in a dogleg shape with the air downstream direction as a convex.
In the state in which the rotary door (2) has the inside air inlets (12A, 12B) opened, one ridge line side surface (28a) forming a cross-section is bent on the air upstream side of the filter (3). In the state where the rotary door (2) is in contact with the portion (33) and the outside air inlet (11) is opened, the other ridge line side surface (28b) forming a cross-section is the air upstream of the filter (3). It is comprised so that the bending part (33) of a side may be contact | connected.
[0010]
Next, operational effects will be described.
According to the first to fourth aspects of the present invention, the reinforcing member (26, 27, 28) is pressed from the upstream side of the air of the filter 3 and is supported from the downstream side of the filter 3. Since the member (43) is pressed by contact, deformation of the filter 3 due to humidity, temperature change, or the like can be suppressed.
[0011]
Moreover, since it is a simple structure which does not have a frame which supplements the rigidity shortage of the filter (3) which consists of filter paper, the reduction of the manufacturing cost of a filter (3) can be aimed at.
Further, since the reinforcing member (26, 27, 28) of the rotary door (2) is used as a pressing member that presses the filter (3) from the upstream side of the air, there is no need to newly provide a pressing member. The deformation of the filter (3) can be easily suppressed while suppressing an increase in cost of the air conditioning inside / outside air switching device.
[0012]
According to the second aspect of the present invention, the filter 3 is formed in a wave shape so as to have a plurality of bent portions (35), and therefore the filter 3 is bent in a direction perpendicular to the bent portions (35). The rigidity of the filter 3 can be ensured by the portion (35). Further, since the reinforcing members (26, 27, 28) are configured to intersect and come into contact with the plurality of bent portions (33) on the air upstream side of the filter (3) at a predetermined angle, the bent portions (33). The rigidity of the filter 3 can be ensured by the reinforcing members (26, 27, 28) also in the direction parallel to). Therefore, the rigidity of the filter 3 can be further increased.
[0013]
According to invention of Claim 4, since the reinforcement member is one, compared with the rotary door (2) of Claim 2, the manufacturing cost reduction of a rotary door can be aimed at. As a result, the cost of the inside / outside air switching device for vehicle air conditioning can be reduced.
Further, since the number of reinforcing members is reduced, the resistance in the air flow path of the air introduced from both the inlets (11, 12A, 12B) is reduced, so that the air suction resistance is reduced, and two reinforcing members are provided. The amount of inhaled air is increased compared to what it has. As a result, the air conditioning capability can be improved as compared with the case having two reinforcing members.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention shown in the drawings will be described.
(First embodiment)
1 to 5 show a first embodiment. The inside / outside air switching device for vehicle air conditioning shown in FIG. 1 is usually arranged on the passenger seat side below the instrument panel at the front of the interior of the automobile, Switch outdoor air introduction.
[0015]
Reference numeral 1 denotes a synthetic resin inside / outside air switching case. This inside / outside air switching case 1 is a first inside air introduction port 12A for introducing room air, a second inside air introduction port 12B, and outside air introduction for introducing outdoor air. It has a mouth 11.
Reference numeral 2 denotes a rotary door, which is rotatably disposed in the inside / outside air switching case 1. As shown in FIGS. 2 and 3, the rotary door 2 includes an arcuate door portion 21 that opens and closes the first inside air introduction port 12 A and the outside air introduction port 11, and a right angle to both axial ends of the arcuate door portion 21. The substantially fan-shaped door support part 24 couple | bonded together and the support shaft 23 provided in the rotation center part of the substantially fan-shaped door support part 24 at right angle outward.
[0016]
The support shaft 23 is rotatably supported by a U-shaped groove 13 provided below the side surface of the inside / outside air switching case 1, and as shown in FIGS. 2 and 3, the U-shaped groove 13. Is formed at a position lower than the air downstream side surface 3a of the filter 3 described below in a state where the support shaft 23 is mounted on the inside / outside air switching case 1.
In addition, a flat door portion 22 that opens and closes the second inside air introduction port 12B is provided at the tip of the stage portion 25 that extends from the circumferential end portion of the door support portion 24 to a position rotated by a predetermined amount around the support shaft 23. , And are connected orthogonally to the stage portion 25.
[0017]
Further, as shown in FIG. 1, a first reinforcing member 26 and a second reinforcing member 27 are provided inside the rotary door 2 in parallel with the support shaft 23 so as to pass through both door support portions 24. . The arcuate door portion 21, the flat door 22, the support shaft 23, the door support portion 24, the first reinforcing member 26, and the second reinforcing member 27 are integrally formed of synthetic resin.
[0018]
With the above structure, the rotary door 2 opens and closes the first inside air introduction port 12A, the outside air introduction port 11 and the second inside air introduction port 12B by rotating about the support shaft 23. For this reason, both the inside air inlets 12 A and 12 B and the outside air inlet 11 are arranged in series in the rotation direction of the rotary door 2. Incidentally, the second inside air introduction port 12 B is located on the side surface of the inside / outside air switching case 1.
[0019]
Reference numeral 3 denotes a filter, which is composed of a filter portion 31 for removing dust made of filter paper formed in a corrugated shape (corrugated) and a packing 32 such as urethane foam or rubber, as shown in FIG. The packing 32 is bonded to both end sides in the bent portion 33 direction. As shown in FIGS. 1 to 3, the filter 3 is disposed between the arcuate door portion 21 and the suction port 42 of the blower casing 4 described below.
[0020]
The filter 3 is disposed on the air downstream side of the arcuate door portion 21, and the direction of the bent portion 33 on the air upstream side is orthogonal to the first and second reinforcing members 26 and 27. Yes. Further, the filter 3 is formed in a trapezoidal shape by bending both side surfaces parallel to the direction of the bent portion 33 so as to protrude toward the arcuate door portion 21 side.
[0021]
As shown in FIG. 4, the bent portions 33 are connected by the cured adhesive 34, and the rigidity of the filter 3 is improved by the adhesive 34 and the packing 32.
By the way, as shown in FIGS. 1-3, any one of the 1st and 2nd reinforcement members 26 and 27 is in contact with all the bending parts 33 of the air upstream side of the filter 3, and is 1st and 2nd reinforcement. The portions of the members 26 and 27 that are in contact with the filter 3 are formed in a trapezoidal shape (see FIG. 9) so as to follow the trapezoidal shape of the filter 3.
[0022]
Reference numeral 4 denotes a synthetic resin scroll-shaped blowing casing. The blowing casing 4 includes a suction port 42 having a bell mouth opening in the direction of the outside air introduction port 11 at the center of the scroll. And a discharge port 41 opened in the tangential direction at the end of the scroll. An air flow path from the suction port 42 to the discharge port 41 is formed.
[0023]
A support member 43 that supports the filter 3 in contact with the bent portion 35 on the downstream side of the filter 3 is integrally formed with the blowing case 4 on the suction port 42 side of the blowing case 4. As shown in FIG. 5, the support member 43 is configured to intersect on the air upstream side of the suction port 42. A support rib 44 (see FIG. 9) that supports the bent portion of the filter 3 is formed integrally with the blowing casing 4.
[0024]
As shown in FIGS. 1 to 3, 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. Has been.
The inside / outside air switching case 1 and the air blowing case 4 are coupled using a bolt, a claw fitting, or a C-shaped clamp (fitting spring) that is fixed by elastic force.
[0025]
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.
[0026]
When the inside air is introduced, as shown in FIG. 2, the rotary door 2 is located on the right side of the page, and the air is introduced from the inside air inlets 12A and 12B, passes through the filter 3, and is sucked from the inlet 42 and discharged. 41 is discharged. At this time, the first reinforcing member 26 is in contact with the bent portion 33 on the air upstream side of the filter 3. Incidentally, the second reinforcing member 27 is not in contact with the filter 3.
[0027]
In addition, when the outside air is introduced, as shown in FIG. 3, the rotary door 2 is located on the left side of the drawing, and air is introduced from the outside air introduction port 11, passes through the filter 3, and is sucked from the suction port 42 and discharged. 41 is discharged. At this time, the second reinforcing member 27 is in contact with the bent portion 33 on the air upstream side of the filter 3. Incidentally, the first reinforcing member 26 is not in contact with the filter 3.
[0028]
Next, features of the present embodiment will be described.
As shown in FIG. 4, the filter 3 has a simple structure that does not have a frame body (see FIG. 10) that compensates for insufficient rigidity of the filter portion 31, so that the manufacturing cost of the filter 3 can be reduced.
Moreover, since the filter 3 is formed in a wave shape so as to have a plurality of bent portions, rigidity can be secured by the bent portions in a direction perpendicular to the bent portions. And since the 1st and 2nd reinforcement members 26 and 27 are comprised so that it may orthogonally contact with the some bending part 33 of the air upstream side of the filter 3, it is also about a direction parallel to the bending part 33. The rigidity of the filter 3 can be ensured by the first and second reinforcing members 26 and 27. Therefore, it is possible to suppress the deflection deformation of the filter 3 in the upstream air direction due to changes in humidity and temperature.
[0029]
Moreover, since the support member 43 is pressed from the bent portion 35 side on the downstream side of the air, it is possible to suppress the deformation in the downstream direction of the air due to the air flow.
In addition, since the first and second reinforcing members 26 and 27 of the rotary door 2 are used as a pressing member for pressing the filter 3 from the bent portion 33 on the upstream side of the air, there is no need to newly provide a pressing member. The deformation of the filter 3 can be easily suppressed while suppressing an increase in cost of the vehicle air conditioning inside / outside air switching device.
[0030]
(Second Embodiment)
In this embodiment, two reinforcing members provided in the first embodiment are used as one, and the cost of the inside / outside air switching device for vehicle air conditioning is further reduced.
As shown in FIG. 6, the structure is such that one reinforcing member 28 is provided in parallel to the support shaft 23 so as to pass through both door support portions 24 of the rotary door 2. Of the reinforcing member 28, the cross-sectional shape perpendicular to the axial direction of the portion parallel to the support shaft 23 is formed in a dogleg shape with the air downstream direction protruding as shown in FIG.
[0031]
Further, as shown in FIG. 9, support ribs 44 that support the bent portions of the filter 3 are formed integrally with the blowing casing 4.
Next, the operation will be described.
When the inside air is introduced, as shown in FIG. 7, the rotary door 2 is located on the right side of the page, and air is introduced from the inside air inlets 12 A and 12 B, passes through the filter 3, and is sucked from the inlet 42. 41 is discharged. At this time, one ridge line side surface 28 a forming a cross-section of the reinforcing member 28 is in contact with and in contact with the bent portion 33 on the upstream side of the filter 3.
[0032]
In addition, when the outside air is introduced, as shown in FIG. 8, the rotary door 2 is located on the left side of the drawing, and air is introduced from the outside air introduction port 11, passes through the filter 3, and is sucked from the suction port 42 and discharged. 41 is discharged. At this time, the other ridge line side surface 28 b forming the cross-section of the reinforcing member 28 is in contact with the bent portion 33 on the air upstream side of the filter 3. FIG. 9 shows a half-sectional view in the B direction of FIG. 6 when the inside air is introduced.
[0033]
Next, features of the present embodiment will be described.
Since there is only one reinforcing member, the shape is simpler than that of a revolving door with two reinforcing members, making it possible to reduce the production cost of the mold for molding and to make it easier to manufacture. Reduction can be achieved. As a result, the cost of the inside / outside air switching device for vehicle air conditioning can be reduced.
[0034]
In addition, since the number of reinforcing members is reduced, the resistance in the flow path of air introduced from both the inlets 11, 12A, 12B is reduced, so that the air suction resistance is reduced, and two reinforcing members are provided. Compared to the above, the amount of air inhalation increases. As a result, the air conditioning capability can be improved as compared with the case having two reinforcing members.
(Third embodiment)
This embodiment is a further development of the second embodiment, in which the reinforcing member 28 and the support shaft 23 of the rotary door 2 are shared.
[0035]
As shown in FIG. 10, the support shaft 29 penetrates both door support portions 24, and the portion that crosses both door support portions 24 constitutes a reinforcing member 29a. The reinforcing member 29 a is always in contact with the bent portion 33 on the air upstream side of the filter 3.
As is apparent from FIG. 10, unlike the first and second embodiments, the support shaft 29 is located on the air upstream side of the air upstream side surface 3b of the filter 3, and the filter 3 is formed in a flat plate shape. Has been.
[0036]
Next, features of the present embodiment will be described.
Since the reinforcing member 29a is always in contact with the bent portion 33 on the air upstream side of the filter 3, the filter 3 can be reliably supported.
In addition, the filter part 31 of the filter 3 is not limited to a wave shape, The present invention can be implemented even if it uses a flat plate.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a first embodiment according to the present invention.
FIG. 2 is a half cross-sectional view in the A direction of FIG. 1 showing an inside air introduction state according to the present embodiment.
FIG. 3 is a half sectional view in the direction A of FIG. 1 showing an outside air introduction state according to the present embodiment.
FIG. 4 is a perspective view showing a filter.
FIG. 5 is a cross-sectional view taken along the line CC in FIG.
FIG. 6 is an overall perspective view of a second embodiment according to the present invention.
7 is a half cross-sectional view in the A direction of FIG. 6 showing the inside air introduction state according to the present embodiment.
8 is a half cross-sectional view in the A direction of FIG. 6 showing an outside air introduction state according to the present embodiment.
9 is a half-sectional view in the B direction of FIG.
FIG. 10 is a half-sectional view in the B direction according to the third embodiment of the present invention.
FIG. 11 is a perspective view showing a filter according to a conventional technique.
[Explanation of symbols]
1 ... inside / outside air switching case, 2 ... rotary door, 3 ... filter,
4 ... Blower casing, 5 ... Blower fan,
11 ... Outside air inlet, 12A ... First inside air inlet,
12B ... 2nd inside air introduction port, 21 ... Arc-shaped door part, 22 ... Planar door part,
23 ... support shaft, 24 ... door support, 25 ... stay,
26, 27, 28, 29 ... reinforcing members,
31 ... Filter part, 32 ... Packing, 34 ... Adhesive, 41 ... Discharge port,
42 ... suction port, 43 ... support member, 44 ... support rib.

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 sucks from the suction port (42). A blowing casing (4) that forms a flow path for guiding the discharged 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) which are arranged adjacent to the upstream side of the suction port (42) and communicate with the suction port (42). )When,
An arcuate door portion (21) 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), and the circle A rotary door comprising a door support portion (24) coupled to both axial ends of the arcuate door portion (21), and a support shaft (23) provided at a rotation center portion of the door support portion (24). (2) and
Reinforcing members (26, 27, 28) of the rotary door (2) provided so as to pass between the door support portions (24);
A filter (3) disposed between the arcuate door portion (21) and the suction port (42) for removing dust;
A support member (43) supporting the filter (3) in contact with the air downstream side of the filter (3),
The vehicle air conditioning inside / outside air switching device, wherein the reinforcing member (26, 27, 28) is in contact with the air upstream side of the filter (3).

The filter (3) is composed of a filter paper that is formed into a wave shape so as to have a plurality of bent portions (35),
The support member (43) is in contact with the bent portion (35) on the air downstream side of the filter (3) to support the filter (3),
The said reinforcing member (26, 27, 28) is comprised so that it may cross | intersect and contact | connect the bending part (33) of the air upstream side of the said filter (3) at a predetermined angle. The inside / outside air switching device for vehicle air conditioning described in 1.

The reinforcing members (26, 27) are composed of two reinforcing members, a first reinforcing member (26) and a second reinforcing member (27),
In a state where the rotary door (2) opens the inside air introduction ports (12A, 12B), the first reinforcing member (26) is in contact with the bent portion (33) on the air upstream side of the filter, and the rotation The second reinforcing member (27) is configured to come into contact with the bent portion (33) on the air upstream side of the filter in a state where the outdoor door (11) is opened by the type door (2). The inside / outside air switching device for vehicle air conditioning according to claim 2.

The reinforcing member (28) is composed of one reinforcing member,
Of the reinforcing member (28), the cross-sectional shape perpendicular to the axial direction of the portion parallel to the support shaft (23) is formed in a dogleg shape with the air downstream direction convex.
In the state where the rotary door (2) opens the inside air inlets (12A, 12B), one ridge line side surface (28a) that forms a cross-sectional shape is located on the upstream side of the air of the filter (3). In the state where the rotary door (2) is in contact with the bent portion (33) and the outside air introduction port (11) is opened, the other ridge line side surface (28b) forming a cross-section is the filter (3 The inside / outside air switching device for vehicle air conditioning according to claim 2, characterized in that it is in contact with the bent portion (33) on the upstream side of the air.