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JP3578564B2 - Air flow switching device for automotive air conditioners - Google Patents
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JP3578564B2 - Air flow switching device for automotive air conditioners - Google Patents

Air flow switching device for automotive air conditioners Download PDF

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Publication number
JP3578564B2
JP3578564B2 JP21477496A JP21477496A JP3578564B2 JP 3578564 B2 JP3578564 B2 JP 3578564B2 JP 21477496 A JP21477496 A JP 21477496A JP 21477496 A JP21477496 A JP 21477496A JP 3578564 B2 JP3578564 B2 JP 3578564B2
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Japan
Prior art keywords
pair
air
shielding film
air flow
pulley
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JP21477496A
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JPH1058943A (en
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秀希 吉田
年春 渡辺
学 魚本
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Marelli Corp
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Calsonic Kansei Corp
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Description

【0001】
【発明の属する技術分野】
この発明に係る自動車用空気調和装置の空気流路切換装置は、自動車室内の暖房、冷房、除湿を行なう為の自動車用空気調和装置を構成するダクト内を流れる空気の流路を変換すべく、この空気調和装置内に組み込んだ状態で利用する。
【0002】
【従来の技術】
自動車室内の暖房、冷房、除湿を行なう為の自動車用空気調和装置は、空調用の空気を流通させる為のダクト内に、この空気を冷却する為のエバポレータと、この空気を加熱する為のヒータコアとを、互いに直列に配置して成る。ヒータコアの側方にはバイパス流路を設け、上記エバポレータを通過した空気の全部又は一部を、上記ヒータコアを通さずに下流側に送れる様にしている。夏期等、自動車室内を冷房する必要がある場合には、上記エバポレータを通過した低温の空気の全部又は大部分を、上記バイパス流路を通じて、自動車室内への吹き出し口に送る。尚、空気がヒータコアとバイパス流路との双方を通過して流れる場合には、これら双方を通過した空気を、これらヒータコア及びバイパス流路の下流側に存在するエアミックスチャンバ部分で混合し、所望温度に調整してから、車室内に吹き出す。但し、頭寒足熱式の空調状態を実現する、所謂バイレベルモードを選択している状態では、上記ヒータコアとバイパス流路とを通過した空気をあまり混合せずに、バイパス流路を通過した低温の空気をベンチレーション吹き出し口から、ヒータコアを通過した暖かい空気を足下吹き出し口から、それぞれ車室内に吹き出す。これに対して、冬期等、自動車室内を暖房する必要がある場合には、上記エバポレータを通過した空気の全部又は大部分を、上記ヒータコアを通じて、自動車室内への吹き出し口(主に足下吹き出し口)に送る。この様に暖房を行なう際には、上記エバポレータには、必ずしも冷媒を通さない。上記吹き出し口から吹き出す空気の温度を中間にする際には、上記ヒータコアを通過する空気の量と上記バイパス流路を通過する空気の量とを適宜調節する。
【0003】
自動車用空気調和装置には、上述の様に、ヒータコアを通過する空気の量とバイパス流路を通過する空気の量とを調節する為の空気流路切換装置が必要になる。この為従来は、上記ヒータコア及びバイパス流路の上流側に、枢軸を中心として揺動する事により、エバポレータを通過した空気のうちヒータコアに流れる割合とバイパス流路に流れる割合とを調節する、エアミックスドアを設けて、上記調節を行なっている。
【0004】
ところが、空気流路切換装置としてエアミックスドアを使用する場合には、このエアミックスドアの揺動に拘らず、このエアミックスドアと他の構成部品との干渉を防止する必要上、エバポレータとヒータコア及びバイパス流路との間隔を大きくしなければならない。この結果、自動車用空気調和装置の小型化が難しくなる。又、自動車用空気調和装置には、上記エアミックスドアの他、空気調和用の空気の取り入れ先を車室外にするか車室内にするかを選択するインテークドア、或は空気調和された空気を車室内に吹き出す為の吹き出し口を選択する為のモードドアがある。これら各ドアも、従来は枢軸を中心として揺動する構造を採用していた為、上記エアミックスドアと同様の問題がある。
【0005】
この様な事情に鑑みて従来から、例えば特開平5−141762号公報、同5−280802号公報に記載されている様に、膜状のダンパを流路の開口と平行に移動させる事により、この開口を開閉する空気流路切換装置が考えられている。
【0006】
【本発明の前提となる構造】
又、本発明者は、エバポレータとヒータコア及びバイパス流路との間隔を大きくする事なく、ヒータコアとバイパス流路とに流れる空気の割合等を変換自在な自動車用空気調和装置の空気流路切換装置として、図5〜8に示す様な構造のものを考えた(例えば、特願平8−132305号参照)。先ず、この先発明に係る自動車用空気調和装置の空気流路切換装置に就いて説明する。
【0007】
自動車用空気調和装置を構成するダクトの内側中間部でエバポレータとヒータコア(何れも図示省略)との間部分には仕切板1を、上記ダクトの内側を塞ぐ状態で設けている。この仕切板1には上下(上下方向は図面による)1対の開口2a、2bを形成しており、一方(例えば上方)の開口2aを上記バイパス流路の上流端に整合させ、他方(例えば下方)の開口2bを、上記ヒータコアの上流側に対向させている。これらヒータコアとバイパス流路とが、互いに並列に配置された1対の空気流路を構成する。又、これらヒータコアとバイパス流路との上流端部が、1対の空気流路の開口端部に相当する。
【0008】
上記仕切板1の上流側(図5、7の右側)部分には、それぞれの内周面に複数の歯を等ピッチで形成した1対の段付の無端ベルト3、3を、上記1対の開口2a、2bを左右両側から挟む状態で、互いに並列に配置している。この為に、これら1対の開口2a、2bを、これら1対の開口2a、2bの配列方向である上下から挟む位置には、駆動軸4及び従動軸5を、これら各軸4、5の両端部を上記ダクトを構成する側壁部分に枢支する事により、回転自在に支持している。そして、このうちの駆動軸5の両端部に駆動プーリ6、6を支持固定している。又、従動軸5の両端部には従動プーリ7 7を、回転自在に支持している。従動プーリ7、7は、上記従動軸5の両端部に固定してこの従動軸5と共に回転する様にしても、或は固定の従動軸5に対して回転自在に支持しても良い。
【0009】
これら駆動プーリ6、6及び従動プーリ7、7のうち、少なくとも駆動プーリ6、6は、それぞれの外周面に上記各段付の無端ベルト3、3の内周面に形成した歯と噛合する段を形成した、段付プーリとしている。好ましくは、上記従動プーリ7、7も段付プーリとすると共に、これら両従動プーリ7、7を、上記従動軸5の両端部に固定する。何れにしても、上記1対の段付無端ベルト3、3は、図示しないステッピングモータ等により上記駆動軸4を回転駆動する事に伴って、互いに同期して循環する。この様な1対の段付無端ベルト3、3同士の間には、上記仕切板1に形成した1対の開口2a、2bのうちの何れか一方の開口2a(又は2b)を選択的に塞ぐ形状及び大きさを有する遮蔽膜8を、上記1対の段付無端ベルト3、3同士の間に掛け渡す状態で設けている。尚、上記各段付無端ベルト3、3の中間部にはテンションプーリ9を設け、これら各段付無端ベルト3、3に適正な張力付与を行なっている。
【0010】
又、上記各段付無端ベルト3、3の中間部内側で、上記仕切板1の上下方向中間部に位置し、上記1対の開口2a、2bの間に位置する中間板部10に対向する部分には、押圧プーリ11を枢支している。この押圧プーリ11と上記駆動プーリ6、6とのピッチと、押圧プーリ11と上記従動プーリ7、7とのピッチとは、互いに等しくしている。更に、上記1対の無端ベルト3、3の内周面で、上記遮蔽膜8の上下両端縁に位置する部分には、それぞれこれら両無端ベルト3、3の内周面から突出する突部12a、12bを設けている。図示の例では、上記遮蔽膜8の上下両端縁部に、この遮蔽膜8の全幅に亙って棒材を固定し、この遮蔽膜8の補強を図ると共に、これら両棒材を、上記突部12a、12bとして機能させている。又、これらこれら両突部12a、12bのピッチは、押圧プーリ11と上記駆動プーリ6、6とのピッチ、並びに押圧プーリ11と上記従動プーリ7、7とのピッチと、ほぼ等しくしている。
【0011】
上述の様に構成される自動車用空気調和装置の空気流路切換装置は、上記駆動プーリ6、6を所望方向に所望量回転させる事により、上記遮蔽膜8を所望位置に移動させ、前記仕切板1に形成した開口2a、2bを開閉する。例えば、図5、7に示す様に、上記遮蔽膜8を上方に移動させ、上側の開口2aに対向させた状態では、この開口2aが塞がれ、下側の開口2bが全開となる。又、この状態では、上記各突部12a、12bが、前記駆動プーリ6、6と押圧プーリ11とに乗り上げる。この結果、上記遮蔽膜8が、上仕切板1に向け押圧されて、上記上側の開口2aのシールが有効に行なわれ、この開口2aに空気が漏れ込む事がなくなる。
【0012】
反対に、下側の開口2bを全閉とし、上側の開口2aを全開とする場合には、図5、7に示した状態とは反対に、上記遮蔽膜8を下方に移動させ、下側の開口2bに対向させる。この状態では、この下側の開口2bが塞がれ、上側の開口2aが全開となる。又、この状態では、上記各突部12a、12bが、前記従動プーリ7、7と押圧プーリ11とに乗り上げる。この結果、上記遮蔽膜8が、上記仕切板1に向け押圧されて、上記下側の開口2bのシールが有効に行なわれ、この開口2bに空気が漏れ込む事がなくなる。
【0013】
これに対して、上下1対の開口2a、2b同士の間で上記遮蔽膜8を移動させる際には、上記突部12a、12bが何れのプーリ6、7、11にも乗り上げない。この為、この遮蔽膜8が上記仕切板1に押し付けられる事はない。従って、この遮蔽膜8の移動を軽い力で行なえるだけでなく、この遮蔽膜8の移動により発生する摩擦音も抑える事ができる。尚、エバポレータを通過した空気の一部をヒータコアを通過させ、残部をバイパス流路を通過させる、所謂エアミックス状態では、上記遮蔽膜8が上記仕切板1に押し付けられない。但し、この場合には、元々ヒータコア及びバイパス流路の双方に空気を流す為、上記遮蔽膜8によるシール性を確保する必要はない。従って、この遮蔽膜8が上記仕切板1に押し付けられない事は、実用上全く問題とはならない。
【0014】
【発明が解決しようとする課題】
上述の様に構成され作用する、先発明に係る自動車用空気調和装置の空気流路切換装置の場合、遮蔽膜8が開口2a又は2bを閉じた状態から、1対の無端ベルト3、3が動き易く、動いた場合には上記遮蔽膜8による開口2a又は2bのシールが不完全になる。この様に、遮蔽膜8が開口2a又は2bを閉じた状態から、1対の無端ベルト3、3が動き易い理由は、次の通りである。
【0015】
例えば、上記開口2aを閉鎖すべく、上記遮蔽膜8をこの開口2aと整合させた状態では、この遮蔽膜8の上縁部に設けた突部12aが駆動プーリ6に乗り上げる事によりこの遮蔽膜8を、仕切板1の一部で上記開口2aの周囲部分に押し付ける。この状態では、上記無端ベルト3、3の一部で、上記突部12aと駆動プーリ6との間に位置する直線部分13に引っ張り方向の力が加わる。そして、この力に基づいて上記駆動プーリ6に、図5に矢印で示す様に、図5〜7で反時計方向の力が加わる。そして、この力の大きさが、上記駆動プーリ6、6を回転駆動する為の電動モータの保持トルク(静止状態に保持する為のトルク)を上回ると、上記無端ベルト3、3が上記図5の矢印方向に動き、その分、上記遮蔽膜8による開口2aのシール性が悪化する。
本発明の自動車用空気調和装置の空気流路切換装置は、この様な原因によるシール性の悪化を防止すべく発明したものである。
【0016】
【課題を解決するための手段】
本発明の自動車用空気調和装置の空気流路切換装置は、前述した先発明に係る自動車用空気調和装置の空気流路切換装置と同様に、1対の空気流路と、1対の無端ベルトと、遮蔽膜と、押圧手段とを備える。
このうち、上記1対の空気流路は、例えばヒータコアとバイパス流路とであって、互いに並列に配置されている。この場合、本発明の自動車用空気調和装置の空気流路切換装置は、前述したエアミックスドアの役目を果たす。又、本発明の自動車用空気調和装置の空気流路切換装置に、前述したインテークドア或はモードドアの役目を果たさせる事もできる。尚、インテークドアの役目を果たさせる場合、上記1対の空気流路は、車外空気取り入れ口及び車内空気取り入れ口である。又、モードドアの役目を果たさせる場合、上記1対の空気流路は、ベンチレーション吹き出し口と足下吹き出し口とデフロスト吹き出し口とのうちから選択される1対の口である。
又、上記1対の無端ベルトは、上記1対の空気流路の開口端部に、これら1対の空気流路の配列方向に掛け渡され、且つこれら1対の空気流路の端部開口を両側から挟む状態で設けられ、互いに同期して駆動される。
又、上記遮蔽膜は、上記1対の空気流路のうちの何れか一方の空気流路の端部開口を選択的に塞ぐ形状及び大きさを有し、上記1対の無端ベルト同士の間に掛け渡されている。
又、上記押圧手段は、上記遮蔽膜が上記1対の空気流路のうちの何れか一方の空気流路の端部開口に整合した状態で、上記遮蔽膜を当該空気流路の端部開口に向け押圧する。又、この押圧手段は、上記1対の無端ベルトの両端部が掛け渡された駆動プーリ若しくは従動プーリと、これら駆動プーリと従動プーリとの中間部で上記1対の空気流路の端部開口同士の間に対向する部分に設けられた押圧プーリと、上記無端ベルトの内周面2個所位置で、上記遮蔽膜が上記何れか一方の空気流路の端部開口に整合する位置に移動した場合に上記駆動プーリ若しくは従動プーリと押圧プーリとの外周面に衝合して、上記遮蔽膜を上記端部開口に向けて押圧する位置に形成した突部とを備える。
更に、本発明の自動車用空気調和装置の空気流路切換装置では、テンションプーリと係合突起とを備える。
このうちのテンションプーリは、上記無端ベルトの一部を弾性的に押圧してこの無端ベルトに張力を付与する。
又、上記係合突起は、上記無端ベルトの外周面2個所位置で、上記遮蔽膜が上記何れか一方の空気流路の端部開口に整合する位置に移動した場合に上記テンションプーリと係合する位置に形成している。
そして、この係合突起は、上記テンションプーリとの係合に基づき、上記押圧手段により上記各無端ベルトに加わる力に拘らず、これら各無端ベルトが移動する事を阻止する位置に形成している。
【0017】
【作用】
上述の様に構成される本発明の自動車用空気調和装置の空気流路切換装置により、1対の空気流路の端部開口の開度を調節したり、或はこれら1対の空気流路のうちの何れか一方の空気流路の端部開口を選択的に開閉すると共に、閉鎖すべき空気流路の端部開口に向けて遮蔽膜を押し付ける際の作用は、前述した先発明に係る自動車用空気調和装置の空気流路切換装置と同様である。
特に、本発明の自動車用空気調和装置の空気流路切換装置の場合には、閉鎖すべき空気流路の端部開口に向けて遮蔽膜を押し付けた状態で、無端ベルトの外周面2個所位置に形成した係合突起のうちの何れかの係合突起が、テンションプーリと係合する。そして、これら係合突起とテンションプーリとの係合に基づき、上記押圧手段により上記各無端ベルトに加わる力に拘らず、これら各無端ベルトが移動する事がなくなる。
【0018】
【発明の実施の形態】
図1〜4は、本発明の実施の形態の1例を示している。尚、本発明の特徴は、1対の無端ベルト3a、3a同士の間に掛け渡した遮蔽膜8が1対の開口2a、2bの何れかを閉じた状態で上記無端ベルト3a、3aの一部に加わる引っ張り方向の力に拘らず、この無端ベルト3a、3aが不用意に動かない様にする部分の構造にある。その他の部分の構造及び作用は、前述した先発明の構造と同様であるから、重複する説明は省略若しくは簡略にし、以下、本発明の特徴部分を中心に説明する。
【0019】
上記各無端ベルト3a、3aの外周面2個所位置には、それぞれ係合突起14a、14bを形成している。これら両係合突起14a、14bのうち、一方(図1〜3の上方)の係合突起14a、14aは、仕切板1に形成した上下1対の開口2a、2bのうち、上方の開口2aを閉鎖すべく、上記1対の無端ベルト3a、3a同士の間に掛け渡された遮蔽膜8をこの開口2aに整合する位置に移動させた場合に、テンションプーリ9の直下に移動し、このテンションプーリ9の下面と係合する位置に形成している。これに対して、他方(図1〜3の下方)の係合突起14bは、仕切板1に形成した上下1対の開口2a、2bのうち、下方の開口2bを閉鎖すべく、上記1対の無端ベルト3a、3a同士の間に掛け渡された遮蔽膜8をこの開口2bに整合する位置に移動させた場合に、テンションプーリ9の直上に移動し、このテンションプーリ9の上面と係合する位置に形成している。
【0020】
尚、これら各係合突起14a、14bの形状及び大きさ、並びに上記テンションプーリ9を上記各無端ベルト3a、3aに押圧している弾力の大きさは、次の様に規制している。即ち、上記1対の無端ベルト3a、3a同士の間に掛け渡した遮蔽膜8が1対の開口2a、2bの何れかを閉じた状態で上記無端ベルト3a、3aの一部に加わる引っ張り方向の力に拘らず、この無端ベルト3a、3aが不用意に動かない様にする。但し、図示しない駆動モータにより駆動軸4及び駆動プーリ6、6を介して上記無端ベルト3a、3aを駆動する際には、上記テンションプーリ9が、図4に示す様に、上記係合突起14a(14b)から退避して、上記各無端ベルト3a、3aの移動を許容する。
【0021】
上述の様に構成される本発明の自動車用空気調和装置の空気流路切換装置の場合には、上記仕切板1に形成した1対の開口2a、2bのうち、閉鎖すべき何れかの開口2a又は2bに向けて遮蔽膜8を押し付けた状態で、上記無端ベルト3a、3aの外周面2個所位置に形成した係合突起14a、14bのうちの何れかの係合突起14a又は14bが、テンションプーリ9と係合する。例えば、上側の開口2aを閉鎖すべく、上記遮蔽膜8をこの開口2aに整合する位置に移動させ、上側の突部12aを駆動プーリ6、6に、下側の突部12bを押圧プーリ11に、それぞれ衝合させた状態では、図3(A)に示す様に、上側の係合突起14aが上記テンションプーリ9の直下に移動する。そして、これら係合突起14aとテンションプーリ9との係合により、上記各無端ベルト3aの直線部分13に加わる引っ張り方向の力に拘らず、上記駆動プーリ6が反時計方向に回転する事を阻止する。
【0022】
これに対して、下側の開口2bを閉鎖すべく、上記遮蔽膜8をこの開口2bに整合する位置に移動させ、上側の突部12aを押圧プーリ11に、下側の突部12bを従動プーリ7、7に、それぞれ衝合させた状態では、図3(B)に示す様に、下側の係合突起14bが上記テンションプーリ9の直上に移動する。そして、これら係合突起14bとテンションプーリ9との係合により、上記各無端ベルト3aの直線部分13aに加わる引っ張り方向の力に拘らず、上記駆動プーリ6が時計方向に回転する事を阻止する。この様に、何れの開口2a、2bを閉じた状態でも、これら何れかの係合突起14a又は14bとテンションプーリ9との係合に基づき、上記各突部12a、12bを含んで構成される押圧手段により上記各無端ベルト3a、3aに加わる力に拘らず、これら各無端ベルト3a、3aが移動する事がなくなる。尚、上記各係合突部14a、14bは、少なくとも一方の無端ベルト3aに形成するが、好ましくは両方の無端ベルト3a、3aに形成する。
【0023】
【発明の効果】
本発明は、以上に述べた通り構成され作用するので、遮蔽膜による流路の閉鎖を確実に行なって、小型化が可能でしかもシール性の良好な自動車用空気調和装置の空気流路切換装置を実現できる。
【図面の簡単な説明】
【図1】本発明の実施の形態の1例を、自動車用空気調和装置の空気流路切換装置の要部を取り出した状態で示す斜視図。
【図2】この空気流路切換装置に組み込む1対の無端ベルトと遮蔽膜との斜視図。
【図3】遮蔽膜が開口を塞いだ状態の2例を示す部分断面図。
【図4】開口の開閉状態を切り換える際に係合突起がテンションプーリを乗り越える状態を示す、図3のX部に相当する断面図。
【図5】先発明に係る自動車用空気調和装置の空気流路切換装置を示す、部分断面図。
【図6】図5のY部拡大図。
【図7】先発明に係る自動車用空気調和装置の空気流路切換装置の要部を取り出して示す斜視図。
【図8】先発明に係る自動車用空気調和装置の空気流路切換装置に組み込む1対の無端ベルトと遮蔽膜との斜視図。
【符号の説明】
1 仕切板
2a、2b 開口
3、3a 無端ベルト
4 駆動軸
5 従動軸
6 駆動プーリ
7 従動プーリ
8 遮蔽膜
9 テンションプーリ
10 中間板部
11 押圧プーリ
12a、12b 突部
13、13a 直線部分
14a、14b 係合突起
[0001]
TECHNICAL FIELD OF THE INVENTION
An air flow path switching device for an air conditioner for an automobile according to the present invention is configured to heat, cool, and dehumidify the interior of an automobile, in order to convert a flow path of air flowing through a duct constituting the air conditioner for an automobile. It is used in a state where it is incorporated in this air conditioner.
[0002]
[Prior art]
An automotive air conditioner for heating, cooling, and dehumidifying the interior of an automobile is provided with an evaporator for cooling the air and a heater core for heating the air in a duct for circulating air for air conditioning. And are arranged in series with each other. A bypass flow path is provided on the side of the heater core so that all or a part of the air that has passed through the evaporator can be sent downstream without passing through the heater core. When it is necessary to cool the interior of the car, such as in summer, all or most of the low-temperature air that has passed through the evaporator is sent to the outlet into the car through the bypass flow path. In the case where air flows through both the heater core and the bypass flow path, the air passing through both of them is mixed in an air mix chamber portion existing downstream of the heater core and the bypass flow path, and the air is mixed. After adjusting to the temperature, blow it out into the cabin. However, when the so-called bi-level mode for realizing the air conditioning state of the head cold foot type is selected, the air that has passed through the bypass passage is not mixed so much with the air that has passed through the heater core and the bypass passage. From the ventilation outlet, and warm air that has passed through the heater core is blown into the vehicle interior from the foot outlet. On the other hand, when it is necessary to heat the interior of the car, such as in winter, all or most of the air that has passed through the evaporator is blown out into the car interior through the heater core (mainly a foot outlet under the feet). Send to When heating is performed in this way, the refrigerant does not necessarily pass through the evaporator. When the temperature of the air blown from the outlet is set to an intermediate temperature, the amount of air passing through the heater core and the amount of air passing through the bypass flow passage are appropriately adjusted.
[0003]
As described above, an air conditioner for an automobile needs an air flow path switching device for adjusting the amount of air passing through a heater core and the amount of air passing through a bypass flow path. For this reason, conventionally, the air that adjusts the ratio of the air flowing through the evaporator to the heater core and the ratio of the air flowing to the bypass flow passage by swinging about the pivot on the upstream side of the heater core and the bypass flow passage. A mix door is provided to make the adjustment.
[0004]
However, when an air mix door is used as an air flow switching device, it is necessary to prevent interference between the air mix door and other components regardless of swinging of the air mix door. In addition, the distance from the bypass passage must be increased. As a result, it becomes difficult to reduce the size of the air conditioner for a vehicle. In addition to the air mix door, the air conditioner for an automobile may include an intake door for selecting whether to take in air for air conditioning outside or inside the vehicle compartment, or air-conditioned air. There is a mode door for selecting the outlet for blowing into the vehicle interior. Conventionally, each of these doors has a structure that swings around a pivot, and thus has the same problem as the above-mentioned air mix door.
[0005]
In view of such circumstances, conventionally, as described in, for example, JP-A-5-141762 and JP-A-5-280802, by moving a membrane-shaped damper in parallel with the opening of the flow path, An air flow switching device that opens and closes this opening has been considered.
[0006]
[Structure on which the present invention is based]
Further, the present inventor has proposed an air flow path switching device for an air conditioner for an automobile, which is capable of changing the ratio of air flowing between the heater core and the bypass flow path without increasing the distance between the evaporator, the heater core and the bypass flow path. For example, a structure as shown in FIGS. 5 to 8 was considered (for example, see Japanese Patent Application No. 8-132305). First, an air flow switching device for an air conditioner for a vehicle according to the present invention will be described.
[0007]
A partition plate 1 is provided in an intermediate portion between the evaporator and the heater core (both not shown) at an intermediate portion inside a duct constituting the air conditioner for a vehicle so as to close the inside of the duct. The partition plate 1 has a pair of upper and lower openings 2a and 2b (the upper and lower directions are as shown in the drawing). One (for example, upper) opening 2a is aligned with the upstream end of the bypass flow path, and the other (for example, The lower opening 2b faces the upstream side of the heater core. The heater core and the bypass flow path constitute a pair of air flow paths arranged in parallel with each other. The upstream ends of the heater core and the bypass flow path correspond to the open ends of the pair of air flow paths.
[0008]
A pair of stepped endless belts 3, 3 each having a plurality of teeth formed at equal pitches on the inner peripheral surface thereof, are provided on the upstream side (the right side in FIGS. 5 and 7) of the partition plate 1. Are arranged in parallel with each other with the openings 2a and 2b being sandwiched from both left and right sides. For this reason, the drive shaft 4 and the driven shaft 5 are located at positions sandwiching the pair of openings 2a and 2b from above and below, which is the arrangement direction of the pair of openings 2a and 2b. Both ends are supported rotatably by pivotally supporting the side walls constituting the duct. The drive pulleys 6 are supported and fixed to both ends of the drive shaft 5 among them. A driven pulley 77 is rotatably supported at both ends of the driven shaft 5. The driven pulleys 7 may be fixed to both ends of the driven shaft 5 so as to rotate together with the driven shaft 5, or may be supported rotatably with respect to the fixed driven shaft 5.
[0009]
Of these drive pulleys 6, 6 and the driven pulleys 7, 7, at least the drive pulleys 6, 6 are provided on the outer peripheral surfaces thereof with the steps meshing with the teeth formed on the inner peripheral surfaces of the stepped endless belts 3, 3, respectively. And a stepped pulley. Preferably, the driven pulleys 7 are also stepped pulleys, and the driven pulleys 7 are fixed to both ends of the driven shaft 5. In any case, the pair of stepped endless belts 3, 3 circulate in synchronization with each other as the drive shaft 4 is driven to rotate by a stepping motor (not shown) or the like. Between such a pair of stepped endless belts 3, 3, one of the pair of openings 2a, 2b formed in the partition plate 1 is selectively provided with one of the openings 2a (or 2b). A shielding film 8 having a closing shape and size is provided in a state of being bridged between the pair of stepped endless belts 3. In addition, a tension pulley 9 is provided at an intermediate portion between the endless belts 3, 3, and appropriate tension is applied to the endless belts 3, 3.
[0010]
Also, inside the middle part of each of the stepped endless belts 3, 3, it is located at the middle part in the vertical direction of the partition plate 1, and faces the middle plate part 10 located between the pair of openings 2a, 2b. A pressing pulley 11 is pivotally supported at the portion. The pitch between the pressing pulley 11 and the driving pulleys 6 is equal to the pitch between the pressing pulley 11 and the driven pulleys 7. Further, on the inner peripheral surfaces of the pair of endless belts 3 and 3, located at the upper and lower ends of the shielding film 8, projections 12a protruding from the inner peripheral surfaces of the endless belts 3 and 3, respectively. , 12b. In the illustrated example, rods are fixed to the upper and lower end edges of the shielding film 8 over the entire width of the shielding film 8 so as to reinforce the shielding film 8 and to attach both rods to the projections. It functions as the parts 12a and 12b. The pitch between these two projections 12a, 12b is substantially equal to the pitch between the pressing pulley 11 and the driving pulleys 6, 6 and the pitch between the pressing pulley 11 and the driven pulleys 7, 7.
[0011]
The air flow path switching device of the automotive air conditioner configured as described above rotates the drive pulleys 6 and 6 in a desired direction by a desired amount to move the shielding film 8 to a desired position. The openings 2a and 2b formed in the plate 1 are opened and closed. For example, as shown in FIGS. 5 and 7, when the shielding film 8 is moved upward to face the upper opening 2a, the opening 2a is closed and the lower opening 2b is fully opened. In this state, the projections 12a and 12b ride on the driving pulleys 6 and 6 and the pressing pulley 11, respectively. As a result, the shielding film 8 is pressed toward the upper partition plate 1 to effectively seal the upper opening 2a, so that air does not leak into the opening 2a.
[0012]
Conversely, when the lower opening 2b is fully closed and the upper opening 2a is fully open, the shielding film 8 is moved downward, as opposed to the state shown in FIGS. To the opening 2b. In this state, the lower opening 2b is closed, and the upper opening 2a is fully opened. In this state, the projections 12a, 12b ride on the driven pulleys 7, 7 and the pressing pulley 11. As a result, the shielding film 8 is pressed toward the partition plate 1 to effectively seal the lower opening 2b, and air does not leak into the opening 2b.
[0013]
On the other hand, when the shielding film 8 is moved between the pair of upper and lower openings 2a, 2b, the protrusions 12a, 12b do not ride on any of the pulleys 6, 7, 11. Therefore, the shielding film 8 is not pressed against the partition plate 1. Therefore, not only can the movement of the shielding film 8 be performed with a light force, but also the friction noise generated by the movement of the shielding film 8 can be suppressed. In a so-called air-mixed state in which a part of the air that has passed through the evaporator passes through the heater core and the remainder passes through the bypass channel, the shielding film 8 is not pressed against the partition plate 1. However, in this case, since the air flows from both the heater core and the bypass flow path from the beginning, it is not necessary to ensure the sealing performance by the shielding film 8. Therefore, the fact that the shielding film 8 is not pressed against the partition plate 1 poses no practical problem.
[0014]
[Problems to be solved by the invention]
In the case of the air flow path switching device for an automotive air conditioner according to the invention, which is configured and operates as described above, the pair of endless belts 3, 3 are formed when the shielding film 8 closes the opening 2a or 2b. It is easy to move, and if it moves, the sealing of the opening 2a or 2b by the shielding film 8 becomes incomplete. The reason why the pair of endless belts 3 and 3 can easily move from the state where the shielding film 8 closes the opening 2a or 2b is as follows.
[0015]
For example, in a state where the shielding film 8 is aligned with the opening 2a so as to close the opening 2a, the projection 12a provided at the upper edge of the shielding film 8 rides on the driving pulley 6 so that the shielding film 8 8 is pressed by a part of the partition plate 1 against the periphery of the opening 2a. In this state, a force in the pulling direction is applied to the linear portion 13 located between the protrusion 12a and the driving pulley 6 at a part of the endless belts 3,3. Then, based on this force, a counterclockwise force is applied to the drive pulley 6 as shown by an arrow in FIG. 5 in FIGS. When the magnitude of this force exceeds the holding torque of the electric motor for rotating and driving the drive pulleys 6 (the torque for holding the motor in a stationary state), the endless belts 3 are moved to the position shown in FIG. , The sealing performance of the opening 2a by the shielding film 8 is deteriorated accordingly.
The air flow switching device of the air conditioner for a vehicle according to the present invention has been invented in order to prevent the deterioration of the sealing performance due to such a cause.
[0016]
[Means for Solving the Problems]
The air flow path switching device of the automotive air conditioner according to the present invention includes a pair of air flow paths and a pair of endless belts, similarly to the air flow switching device of the automotive air conditioner according to the preceding invention. , A shielding film, and pressing means.
Among them, the pair of air flow paths are, for example, a heater core and a bypass flow path, and are arranged in parallel with each other. In this case, the air flow path switching device of the automotive air conditioner of the present invention functions as the above-described air mixing door. Further, the air flow path switching device of the automotive air conditioner of the present invention can also serve as the above-described intake door or mode door. Note that, when functioning as an intake door, the pair of air passages is an outside air intake and an inside air intake. Further, when functioning as a mode door, the pair of air flow paths is a pair of ports selected from a ventilation outlet, a foot outlet, and a defrost outlet.
Further, the pair of endless belts are wound around the opening ends of the pair of air flow passages in the direction in which the pair of air flow passages are arranged. Are sandwiched from both sides, and are driven in synchronization with each other.
Further, the shielding film has a shape and a size to selectively close an end opening of one of the pair of air flow paths, and is provided between the pair of endless belts. Has been passed over.
Further, the pressing means may move the shielding film to an end opening of the air flow path in a state where the shielding film is aligned with an end opening of one of the air flow paths of the pair of air flow paths. Press toward. The pressing means includes a drive pulley or a driven pulley over which both ends of the pair of endless belts are wound, and an end opening of the pair of air flow paths at an intermediate portion between the drive pulley and the driven pulley. At two positions on the inner peripheral surface of the endless belt and the pressing pulley provided at a portion facing each other, the shielding film has moved to a position matching the end opening of one of the air flow paths. A projection formed at a position where the shielding film is pressed toward the end opening by abutting against the outer peripheral surface of the driving pulley or driven pulley and the pressing pulley.
Furthermore, the air flow switching device for an air conditioner for a vehicle according to the present invention includes a tension pulley and an engagement protrusion.
The tension pulley elastically presses a part of the endless belt to apply tension to the endless belt.
The engagement protrusion engages with the tension pulley when the shielding film moves to a position matching the end opening of one of the air flow paths at two positions on the outer peripheral surface of the endless belt. It is formed in the position where it does.
The engagement projections are formed at positions where the endless belts are prevented from moving based on engagement with the tension pulleys, regardless of the force applied to the endless belts by the pressing means. .
[0017]
[Action]
The opening degree of the end opening of the pair of air flow paths is adjusted by the air flow path switching device of the automotive air conditioner of the present invention configured as described above, or the pair of air flow paths is adjusted. While selectively opening and closing the end opening of any one of the air passages, the action at the time of pressing the shielding film toward the end opening of the air passage to be closed is according to the above-described prior invention. This is the same as the air flow switching device of the air conditioner for automobiles.
In particular, in the case of the air flow switching device for an air conditioner for a vehicle according to the present invention, the outer peripheral surface of the endless belt is positioned at two positions with the shielding film pressed toward the end opening of the air flow passage to be closed. , One of the engagement protrusions formed in the step (1) engages with the tension pulley. Then, based on the engagement between the engagement protrusions and the tension pulleys, the endless belts do not move regardless of the force applied to the endless belts by the pressing means.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show an example of an embodiment of the present invention. A feature of the present invention is that the shielding film 8 stretched between the pair of endless belts 3a, 3a closes one of the pair of endless belts 3a, 3a in a state where one of the pair of openings 2a, 2b is closed. The endless belts 3a, 3a are configured so as to prevent the endless belts 3a, 3a from being accidentally moved irrespective of the pulling force applied to the portion. Since the structure and operation of the other parts are the same as those of the above-described structure of the present invention, the overlapping description will be omitted or simplified, and the following description will focus on the characteristic parts of the present invention.
[0019]
Engagement protrusions 14a, 14b are formed at two positions on the outer peripheral surface of the endless belts 3a, 3a, respectively. Of these two engagement projections 14a, 14b, one (upper in FIG. 1 to 3) engagement projection 14a, 14a is an upper opening 2a of a pair of upper and lower openings 2a, 2b formed in the partition plate 1. When the shielding film 8 stretched between the pair of endless belts 3a, 3a is moved to a position matching the opening 2a in order to close the door, the shielding film 8 is moved immediately below the tension pulley 9, It is formed at a position where it engages with the lower surface of the tension pulley 9. On the other hand, the other (lower in FIGS. 1 to 3) engaging projections 14b is used to close the lower opening 2b of the pair of upper and lower openings 2a, 2b formed in the partition plate 1. When the shielding film 8 stretched between the endless belts 3a and 3a is moved to a position matching the opening 2b, the shielding film 8 moves right above the tension pulley 9 and engages with the upper surface of the tension pulley 9. It is formed in the position where it does.
[0020]
The shape and size of each of the engagement projections 14a and 14b, and the magnitude of the elasticity of pressing the tension pulley 9 against the endless belts 3a and 3a are regulated as follows. That is, the pulling direction applied to a part of the endless belts 3a, 3a in a state where the shielding film 8 stretched between the pair of endless belts 3a, 3a closes any of the pair of openings 2a, 2b. The endless belts 3a, 3a are prevented from inadvertently moving regardless of the force. However, when the endless belts 3a, 3a are driven by the drive motor (not shown) via the drive shaft 4 and the drive pulleys 6, 6, the tension pulley 9 is driven by the engagement protrusions 14a, as shown in FIG. (14b), the endless belts 3a, 3a are allowed to move.
[0021]
In the case of the air flow switching device for an automotive air conditioner of the present invention configured as described above, any one of the pair of openings 2a and 2b formed in the partition plate 1 is to be closed. In a state where the shielding film 8 is pressed toward 2a or 2b, one of the engagement protrusions 14a or 14b of the engagement protrusions 14a and 14b formed at two positions on the outer peripheral surface of the endless belts 3a and 3a is Engage with the tension pulley 9. For example, in order to close the upper opening 2a, the shielding film 8 is moved to a position matching the opening 2a, the upper protrusion 12a is connected to the driving pulleys 6, 6, and the lower protrusion 12b is connected to the pressing pulley 11. 3A, the upper engaging projections 14a move directly below the tension pulley 9, as shown in FIG. The engagement between the engagement protrusions 14a and the tension pulley 9 prevents the drive pulley 6 from rotating counterclockwise regardless of the pulling force applied to the linear portion 13 of each endless belt 3a. I do.
[0022]
On the other hand, in order to close the lower opening 2b, the shielding film 8 is moved to a position matching the opening 2b, the upper protrusion 12a is driven by the pressing pulley 11, and the lower protrusion 12b is driven. In a state where the pulleys 7 are brought into contact with each other, as shown in FIG. 3B, the lower engagement protrusion 14b moves directly above the tension pulley 9. The engagement between the engagement projections 14b and the tension pulley 9 prevents the drive pulley 6 from rotating clockwise regardless of the pulling force applied to the linear portion 13a of each endless belt 3a. . In this manner, even when any of the openings 2a and 2b are closed, each of the projections 12a and 12b is configured based on the engagement between the engagement protrusion 14a or 14b and the tension pulley 9. The endless belts 3a, 3a do not move regardless of the force applied to the endless belts 3a, 3a by the pressing means. The engaging projections 14a and 14b are formed on at least one endless belt 3a, but are preferably formed on both endless belts 3a and 3a.
[0023]
【The invention's effect】
Since the present invention is constructed and operates as described above, the air flow path switching device of the air conditioner for a vehicle which can be downsized and has good sealing performance by reliably closing the flow channel by the shielding film. Can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of an embodiment of the present invention in a state where a main part of an air flow switching device of an air conditioner for a vehicle is taken out.
FIG. 2 is a perspective view of a pair of endless belts and a shielding film incorporated in the air flow switching device.
FIG. 3 is a partial cross-sectional view showing two examples of a state in which a shielding film blocks an opening.
FIG. 4 is a cross-sectional view corresponding to a portion X in FIG. 3, showing a state in which an engagement protrusion gets over a tension pulley when switching an opening / closing state of an opening.
FIG. 5 is a partial cross-sectional view showing an air flow switching device of the automotive air conditioner according to the invention.
FIG. 6 is an enlarged view of a portion Y in FIG. 5;
FIG. 7 is a perspective view of an essential part of the air flow switching device of the automotive air conditioner according to the prior invention.
FIG. 8 is a perspective view of a pair of endless belts and a shielding film incorporated in the air flow switching device of the automotive air conditioner according to the prior invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Partition plate 2a, 2b Opening 3, 3a Endless belt 4 Drive shaft 5 Drive shaft 6 Drive pulley 7 Drive pulley 8 Shielding film 9 Tension pulley 10 Intermediate plate portion 11 Press pulleys 12a, 12b Projections 13, 13a Linear portions 14a, 14b Engaging projection

Claims (1)

互いに並列に配置された1対の空気流路と、この1対の空気流路の開口端部に、これら1対の空気流路の配列方向に掛け渡され、且つこれら1対の空気流路の端部開口を両側から挟む状態で設けられ、互いに同期して駆動される1対の無端ベルトと、上記1対の空気流路のうちの何れか一方の空気流路の端部開口を選択的に塞ぐ形状及び大きさを有し、上記1対の無端ベルト同士の間に掛け渡された遮蔽膜と、この遮蔽膜が上記1対の空気流路のうちの何れか一方の空気流路の端部開口に整合した状態で、上記遮蔽膜を当該空気流路の端部開口に向け押圧する押圧手段とを備え、上記押圧手段は、上記1対の無端ベルトの両端部が掛け渡された駆動プーリ若しくは従動プーリと、これら駆動プーリと従動プーリとの中間部で上記1対の空気流路の端部開口同士の間に対向する部分に設けられた押圧プーリと、上記無端ベルトの内周面2個所位置で、上記遮蔽膜が上記何れか一方の空気流路の端部開口に整合する位置に移動した場合に上記駆動プーリ若しくは従動プーリと押圧プーリとの外周面に衝合して、上記遮蔽膜を上記端部開口に向けて押圧する位置に形成した突部とを備えた自動車用空気調和装置の空気流路切換装置であって、上記無端ベルトの一部を弾性的に押圧してこの無端ベルトに張力を付与するテンションプーリと、上記無端ベルトの外周面2個所位置で、上記遮蔽膜が上記何れか一方の空気流路の端部開口に整合する位置に移動した場合に上記テンションプーリと係合する位置に形成した係合突起とを備え、この係合突起は、上記テンションプーリとの係合に基づき、上記押圧手段により上記各無端ベルトに加わる力に拘らず、これら各無端ベルトが移動する事を阻止する位置に形成されている自動車用空気調和装置の空気流路切換装置。A pair of air flow passages arranged in parallel with each other, and a pair of air flow passages extending over the open ends of the pair of air flow passages in the arrangement direction of the pair of air flow passages; And a pair of endless belts which are provided so as to sandwich the end opening from both sides and are driven in synchronization with each other, and an end opening of any one of the pair of air passages is selected. A shielding film having a shape and a size to be closed in a closed manner and being stretched between the pair of endless belts, and the shielding film being one of the air flow paths of the pair of air flow paths Pressing means for pressing the shielding film toward the end opening of the air flow path in a state aligned with the end opening of the pair of endless belts. Between the driving pulley or the driven pulley and the intermediate portion between the driving pulley and the driven pulley. At two positions on the inner peripheral surface of the endless belt, the shielding film is aligned with the end opening of one of the air passages at the position of the pressing pulley provided at the portion facing between the end openings. And a projection formed at a position where the abutting outer peripheral surface of the driving pulley or the driven pulley and the pressing pulley when pressed to the position pushes the shielding film toward the end opening. An air flow switching device for an air conditioner, comprising: a tension pulley that elastically presses a part of the endless belt to apply tension to the endless belt; An engaging projection formed at a position where the shielding film is engaged with the tension pulley when the shielding film is moved to a position aligned with an end opening of one of the air passages; Based on the engagement with the pulley The pressing means regardless of the force applied to each endless belt, the air passage switching device of the endless belt automotive air conditioner which is formed in a position to prevent it moving.
JP21477496A 1996-08-14 1996-08-14 Air flow switching device for automotive air conditioners Expired - Fee Related JP3578564B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21477496A JP3578564B2 (en) 1996-08-14 1996-08-14 Air flow switching device for automotive air conditioners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21477496A JP3578564B2 (en) 1996-08-14 1996-08-14 Air flow switching device for automotive air conditioners

Publications (2)

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JPH1058943A JPH1058943A (en) 1998-03-03
JP3578564B2 true JP3578564B2 (en) 2004-10-20

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4030516A1 (en) * 1990-09-27 1992-04-02 Draegerwerk Ag METHOD FOR CONCENTRATION MONITORING A GAS SHAPED COMPONENT IN A CONCLUDED SPACE
KR100739467B1 (en) 2000-11-20 2007-07-13 한라공조주식회사 Air Intake Box for Blower Unit
JP6111051B2 (en) * 2012-11-16 2017-04-05 サンデンホールディングス株式会社 Air conditioner for vehicles

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