JP2004217103A - Sealing structure of air passage - Google Patents

Sealing structure of air passage Download PDF

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JP2004217103A
JP2004217103A JP2003007914A JP2003007914A JP2004217103A JP 2004217103 A JP2004217103 A JP 2004217103A JP 2003007914 A JP2003007914 A JP 2003007914A JP 2003007914 A JP2003007914 A JP 2003007914A JP 2004217103 A JP2004217103 A JP 2004217103A
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air
rod
shaped packing
opening
packing
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JP4123943B2 (en
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Tomohiro Takeo
友宏 竹尾
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To securely prevent air from leaking at an overlapping portion of a rod-shaped packing in a sealing component with a configuration to prevent air leakage with the rod-shaped packing which is elastic. <P>SOLUTION: A seal 7 is so configured that a stick-shaped packing 8 is stuck on the outer wall surface of an air conditioning case 2 in a fashion to wrap around the circumference of an inner pipe 31, and that a flange 62 placed on the edge of an opening of a face duct 6 is pressed to the packing 8 that has been wrapped around the pipe 31 to be fixed closely for obtaining air tightness. There is provided a recessed component 20 on the air conditioning case 2 at the position where the end 13 of the packing 8 overlaps with a start portion 12 for removing a step created by the overlap of the packing 8. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、それぞれその内部を空気が流れる２つ空気通路間の接続部における風漏れを防止するシール構造に関する。
【０００２】
【従来の技術】
図６に、例えば車両用空調装置の空調ケース１０２とダクト１０６との接続部におけるシール構造を示す。空調ケース１０２に設けられた開口部１３０は、ダクト１０６との接続部をなす内管１３１にて構成されている。また、ダクト１０６は車室内の所定部位に向かって空気を吹出すため空気を導くものであり、空調ケース１０２との接続部をなす外管１６１にて構成されている。
そして、これら内管１３１と外管１６１とを矢印Ａ方向に相互嵌合することにより、空調ケース１０２の開口部１３０とダクト１０６の開口部１６０とが連結される。
【０００３】
空調ケース１０２とダクト１０６との接続部には、風漏れ防止用のシール部１０７が構成されている。当該シール部１０７としては、弾性を有する一本の棒状パッキン１０８を内管１３１の周囲にほぼ沿うように巻回して空調ケース１０２の外壁面に貼り付け、一方、ダクト１０６の開口端に設けたフランジ部１６２を当該パッキン１０８に圧接させるようにして、気密性が得られるようにしている。
【０００４】
ここで棒状パッキン１０８を巻回する際に、棒状パッキン１０８の始端部１１２に終端部１１３が乗り上げるようにしてシール部１０７を形成することが提案されている（例えば、特許文献１参照）。
【０００５】
【特許文献１】
特開２００２−５２９３号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、上記従来技術では、棒状パッキン１０８の始端部１１２と終端部１１３とが重なり合う構造であり、ダクト１０６のパッキン１０８への圧接度合いが弱いと、パッキン１０８が２重となった部分（段差部）以外の気密性が低くなるという問題がある。
例えばパッキンの厚さ方向のつぶれ度合いが５０％程度となるように圧接度合いを調整した場合、パッキン１０８が２重となった段差部以外のパッキンはほとんどつぶれず、全周において風漏れの原因となる。
【０００７】
一方、ダクト１０６のパッキン１０８への圧接度合いが強いと、パッキン１０８が２重になった段差部がその復元力によりダクト１０６のフランジ部１６２を押し上げ、それによりダクト１０６が浮き上がり組付け状態が斜めとなり、やはり風漏れの原因となる場合がある。
【０００８】
なお、棒状パッキン１０８の長さを貼り付け時に始端部１１２と終端部１１３を突合せできるように端部カット行うことで、上述の段差部を形成しないようにすることも考えられるが、工数が増えてしまうという問題がある。
【０００９】
本発明は、上記点に鑑み、棒状パッキンが重なりを有してシール部を形成する場合に、当該重なり部分をほぼ平坦とすることができる空気通路のシール構造を提供することを目的とする。
【００１０】
【課題を解決するための手段】
上記目的を達成するため、請求項１に記載の発明では、第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造において、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回の始端部（１２）と終端部（１３）とが接触する位置に凹部（２０）を形成したことを特徴としている。
【００１１】
また、請求項２に記載の発明では、第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造において、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回の終端部（１３）がその始端部（１２）に重なる位置に凹部（２０）を形成したことを特徴としている。
【００１２】
また、請求項３に記載の発明では、第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造において、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回において前記棒状パッキン（８）が重なる位置に凹部（２０）を形成したことを特徴としている。
【００１３】
また、請求項４に記載の発明では、第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造において、
前記第１、２の空気通路（２、６）の少なくとも一方には、前記棒状パッキン（８）の巻回の始端部（１２）と終端部（１３）を接触させた状態で格納する凹部（２０）を形成したことを特徴としている。
【００１４】
また、請求項５に記載の発明では、第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造において、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回の始端部（１２）位置に凹部（２０）を形成したことを特徴としている。
【００１５】
上記請求項１〜５記載の発明では、棒状パッキン（８）の巻回する場合に棒状パッキンが重なりを有するようにしてシール部を形成する場合であっても、当該位置の第１、２の空気通路の少なくとも一方に凹部（２０）を形成するようにしているため、当該凹部（２０）により当該重なり部分をほぼ平坦とすることができる。
【００１６】
なお、上記各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。
【００１７】
【発明の実施の形態】
以下、本発明の各実施形態を図に基づいて説明する。
【００１８】
（第１実施形態）
以下、本発明の空気通路のシール構造を、自動車用空調装置１におけるフェイス開口部３ａ、３ｂとフェイスダクト６ａ、６ｂとの接続部に適用した第１実施形態について図１〜４を用いて説明する。なお、図１は本実施形態における自動車用空調装置１の全体構成図で、フェイスダクト６ａ、６ｂを取外した状態を示す図、図２はフェイスダクト６ａ、６ｂを組付けた状態を示す図１相当図、図３はシール部７の構成を示す斜視図、図４は棒状パッキン８の始端部１２と終端部１３の重なり部を示す要部断面図である。
【００１９】
まず、本実施形態における自動車用空調装置１の構成について図１〜２を用いて説明する。
【００２０】
自動車用空調装置１は、例えばＰＰ（ポリプロピレン）等の樹脂材料にて形成された空調ケース２を備えており、空調ケース２内に吸込まれた空気を、冷却用熱交換器としてのエバポレータ（図示しない）、加熱用熱交換器としてのヒータコア（図示しない）、および温度調節手段としてのエアミックスドア（図示しない）によって乗員の所望温度に調節するようになっている。
【００２１】
この所望温度に調節された空調空気は、空調ケース２に形成されたフェイス開口部３ａ、３ｂ、フット開口部４、およびデフロスタ開口部５のうち、吹出モード（フェイスモード、バイレベルモード、フットモード、フットデフロスタモード、デフロスタモード）に応じて選択された開口部から吹出される。
【００２２】
フェイス開口部３ａ、３ｂは、車室内乗員の上半身のうち、センターコンソール側に対応した部位に形成されたセンタフェイス吹出口（図示しない）に向かって上記空調空気を吹出すセンタフェイス開口部３ａと、車室内乗員の上半身のうち、サイドガラス側に対応した部位に形成されたサイドフェイス吹出口（図示しない）に向かって上記空調空気を吹出すサイドフェイス開口部３ｂとからなっている。ここで、センタフェイス開口部３ａ、サイドフェイス開口部３ｂは、それぞれ略四角形状で開口している。また、センタフェイス開口部３ａの車両前後方向の長さは、サイドフェイス開口部３ｂのそれよりも短く形成されている。
【００２３】
また、フット開口部４は、車室内乗員の足元に向かって上記空調空気を吹出し、デフロスタ開口部５は、車両フロントガラス内面（図示しない）に向かって上記空調空気を吹出すようになっている。
【００２４】
また、各フェイス開口部３ａ、３ｂと上記各フェイス吹出口とは、それぞれフェイスダクト６ａ、６ｂにて接続されている。
【００２５】
フェイスダクト６ａ、６ｂは、例えばＰＰ（ポリプロピレン）等の樹脂材料にて形成され、センタフェイス開口部３ａに接続されるセンタフェイスダクト６ａと、サイドフェイス開口部３ｂに接続されるサイドフェイスダクト６ｂとからなる。また、各フェイスダクト６ａ、６ｂの上流端開口部は、各フェイス開口部３ａ、３ｂの形状とほぼ同形状とされている。
【００２６】
また、センタフェイスダクト６ａ上流端の車両前後方向の長さは、サイドフェイスダクト６ｂ上流端のそれよりも短く形成されている。
【００２７】
また、各フェイス開口部３ａ、３ｂと各フェイスダクト６ａ、６ｂとの各接続部には、風漏れを防止するシール部７がそれぞれ設けられている。
【００２８】
各シール部７は、各々略直方体形状の一本の棒状パッキン８にて構成されており、この棒状パッキン８は、例えばウレタンフォーム等の弾性を有した材質からなっている。
【００２９】
棒状パッキン８は、各フェイス開口部３ａ、３ｂの縁部にほぼ沿って周回するように巻回されている。棒状パッキン８にはフェイス開口部３ａ、３ｂの開口形状に沿って曲げ部と直線部ができ、曲げ部は棒状パッキン８の弾性によって側面が曲面状となっている。また、直線部の側面は平面状となっている。
【００３０】
棒状パッキン８の設置状態において、棒状パッキン８の下面部および上面部が、それぞれ各フェイス開口部３ａ、３ｂの縁部および各フェイスダクト６ａ、６ｂの上流端に、例えば両面テープのような固定手段にて密着固定される。
【００３１】
なお、本実施形態においては、棒状パッキン８の終端部１３が、棒状パッキン８の直線部において始端部１２に重なるように乗り上げた状態で、巻回が終了している。
【００３２】
次に、フェイス開口部３０（３ａ、３ｂ）へのフェイスダクト６（６ａ、６ｂ）の組付け構造、及びシール部７の構造について図３、４を用いて説明する。
【００３３】
空調ケース２に設けられたフェイス開口部３０を縁取るように、フェイスダクト６との接続部を構成する内管３１が形成されている。また、フェイスダクト６の上流端、即ち空調ケース２との接続部は、当該接続部の外管６１を構成する。これら内管３１、外管６１を、図３中、矢印Ａ方向に相互嵌合することにより、空調ケース２のフェイス開口部３０とフェイスダクト６の開口端部６０とが連結される。
【００３４】
シール部７は、上述のように、棒状パッキン８を内管３１の周囲にほぼ沿うように巻回して空調ケース２の外壁面に貼り付け、フェイスダクト６の開口端に設けたフランジ部６２を巻回されたパッキン８に圧接させた状態で両面テープ等の固定手段にて密着固定するようにして、気密性を得るようにしている。
【００３５】
ここで棒状パッキン８を巻回する際に、棒状パッキン８の始端部１２に終端部１３が乗り上げるようにしてシール部７が形成されている。棒状パッキン８の巻回時に作業者は、フェイス開口部３０の縁部において空調ケース２の外壁面に設けた凹部２０の底頂部２１に、棒状パッキン８の始端部１２の端部を位置合わせし、この位置から棒状パッキン８をフェイス開口部３０、即ち内管３１の外周部にほぼ沿って曲げ、終端部１３を始端部１２に重ならせた状態で貼り付ける。このとき、棒状パッキン８の終端部１３の端部が、凹部２０上において棒状パッキンの折れ曲がり部１２ａより始端側に位置するように貼り付けることが望ましい（図４参照）。
【００３６】
また凹部２０の深さは、凹部２０の底頂部２１に棒状パッキン８の始端部１２の端部を位置合わせしたときに、当該始端部１２の端部が凹部より上方に突出しない深さとなるように、棒状パッキン８の厚さに応じて設定されていることが望ましい。
【００３７】
また凹部２０を設ける位置も、凹部２０によって空調ケース２内部に突出部が形成される場合、空調ケース内に設けられる開口部４〜５の選択用のダンパの動作と干渉しない位置とすることが望ましく、さらには当該突出部に起因して風切り音が発生しないように、空調ケース２内部を流通する空気流分布を勘案して高風量分布領域を避ける位置に配置することが望ましい。
【００３８】
次に、本実施形態の作動を説明する。
【００３９】
自動車用空調装置１が始動すると、空調ケース２内に吸込まれた空気が所望温度に空調され、フェイス開口部３ａ、３ｂ、フット開口部４、デフロスタ開口部５のうち、吹出モードに応じて選択された開口部３〜５から車室内に向かって吹出される。
【００４０】
ここで、フェイスモードやバイレベルモード時には、上記空調空気がフェイス開口部３ａ、３ｂから吹出され、更に、各フェイスダクト６ａ、６ｂを介して上記各フェイス吹出口から車室内乗員の上半身へ吹出される。このとき、シール部７によって、各フェイス開口部３ａ、３ｂと各フェイスダクト６ａ、６ｂとの接続部における風漏れが防止される。
【００４１】
以上説明した本実施形態によると、各フェイス開口部３ａ、３ｂと各フェイスダクト６ａ、６ｂとの接続部に設けられるシール部７は、弾性を有した棒状パッキン８にて構成され、棒状パッキン８は、各フェイス開口部３ａ、３ｂの縁部にほぼ沿って設けられ、設置状態において棒状パッキン８の始端部１２および終端部１３は空調ケース２に設けた凹部２０の位置にて上下に重ならせた状態で貼り付けられている。
【００４２】
その結果、棒状パッキン８の巻回する際に棒状パッキン８の始端部１２と終端部１３が重なって局所的にシールパッキンの厚みが増す場合であっても、当該厚みは凹部２０により吸収され、棒状パッキン８の巻回全周においてそのシールパッキンの高さをほぼ同程度とすることができる。
【００４３】
したがってフェイスダクト６の棒状パッキン８への圧接度合い、すなわちパッキンの厚さ方向のつぶれ度合いを、棒状パッキン８の巻回全周においてほぼ一様とすることができ、また、局所的に棒状パッキン８の反力が大きくなってフェイスダクト６が斜めに組み付いてしまうこともなく、空調ケース２とフェイスダクト６との連結部からの風漏れを抑制することができる。
【００４４】
また従来、空調ケース２のフラット部分に棒状パッキン８を貼り付けるようにしていた為、その貼り始め位置を貼り付け作業者に明確に指示することができなかったが、本実施形態によれば凹部２０を設けることによりパッキン貼り付けのスタート位置を明確に規定することができる。
【００４５】
（第２実施形態）
次に本発明の第２実施形態を、図５を用いて説明する。図５は棒状パッキン８の始端部１２と終端部１３の重なり部を示す要部断面図であり、上記第１実施形態の図４相当図である。以下、第１実施形態との相違点をついて説明する。
【００４６】
上記第１実施形態においては棒状パッキン８の始端部１２上に終端部１３が乗り上げるように棒状パッキン８を巻回するものであったが、本実施形態においては空調ケース２に設けた凹部２０内で始端部１２と終端部１３のパッキン８上部が相互に当接するように棒状パッキン８を巻回したものである。
【００４７】
本実施形態のシール構造によっても、棒状パッキン８の始端部１２と終端部１３が重なり部が凹部２０内に格納され、棒状パッキン８の巻回全周においてそのシールパッキンの高さをほぼ同程度とすることができる。
【００４８】
したがって上記第１実施形態同様、フェイスダクトの棒状パッキン８への圧接度合い、すなわちパッキンの厚さ方向のつぶれ度合いを、棒状パッキン８の巻回全周においてほぼ一様とすることができ、また、局所的に棒状パッキン８の反力が大きくなってフェイスダクト６が斜めに組み付いてしまうことも防止でき、空調ケース２とフェイスダクトとの連結部からの風漏れを抑制することができる。
【００４９】
また、凹部２０によりパッキン貼り付けのスタート位置を明確に規定することができる。
【００５０】
なお、本実施形態において凹部の形状は、棒状パッキン８の始端部１２、終端部１３の上面当接部においてシールパッキンの厚みが凹まないように、棒状パッキン８の厚みに応じて設定されていることが望ましい。具体的には、凹部形状を断面方形状とし、その底部幅をほぼ棒状パッキン８の厚さの２倍程度以下とすることが望ましい。
【００５１】
（他の実施形態）
上記第１、２実施形態では、本発明を、自動車用空調装置１の空調ケース２に形成されたフェイス開口部３ａ、３ｂと、フェイス開口部３ａ、３ｂに接続されるフェイスダクト６ａ、６ｂとの接続部におけるシール構造に適用した形態について説明したが、これに限らず、例えば、デフロスタ開口部５とデフロスタダクトとの接続部におけるシール構造や、ダクトとダクトとの接続部におけるシール構造に適用しても良い。
【００５２】
また、凹部２０の配置位置も棒状パッキン８の巻回形状における直線部でなくてもよく、曲がり部であってもよい。
【００５３】
また、上記第１、２実施形態では空調ケース２側に凹部２０を設けた例を示したが、ダクト６側に設けるようにしてもよい。また棒状パッキン８の貼り付けも空調ケース側に限定されるものでなく、ダクト６側としても勿論よい。なお、凹部２０と棒状パッキン８の貼り付け面は同一部材とした方が作業性が向上する。
【００５４】
また、上記各実施形態では、棒状パッキン８が始端部１２および終端部１３にて重なる場合を示したが、巻回途中で重なり部分が発生する場合にその重なり部分に本発明を適用するようにしてもよい。
【００５５】
また、上記各実施形態では、開口部の縁部の曲がり部が角状になっているが、これに限らず、例えば、曲がり部が丸みをもっていても良い。
【図面の簡単な説明】
【図１】第１実施形態における自動車用空調装置の全体構成図で、フェイスダクトを取外した状態を示す図である。
【図２】第１実施形態における自動車用空調装置の全体構成図で、フェイスダクトを組付けた状態を示す図である。
【図３】第１実施形態におけるシール部の構成を示す斜視図である。
【図４】第１実施形態における棒状パッキンの始端部と終端部の重なり部を示す要部断面図である。
【図５】第１実施形態における棒状パッキンの始端部と終端部の重なり部を示す要部断面図である。
【図６】従来のシール部の構成を示す斜視図である。
【符号の説明】
２…空調ケース、３０…フェイス開口部、３ａ…センタフェイス開口部、３ｂ…サイドフェイス開口部、６…フェイスダクト、６ａ…センタフェイスダクト、６ｂ…サイドフェイス開口部、７…シール部、８…棒状パッキン、１２…始端部、１３…終端部、２０…凹部、２１…底頂部。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seal structure for preventing air leakage at a connection between two air passages through which air flows.
[0002]
[Prior art]
FIG. 6 shows a seal structure at a connection portion between an air conditioning case 102 and a duct 106 of a vehicle air conditioner, for example. The opening 130 provided in the air-conditioning case 102 is formed by an inner pipe 131 that connects to the duct 106. The duct 106 guides air to blow out air toward a predetermined portion in the vehicle interior, and is configured by an outer pipe 161 that connects to the air conditioning case 102.
Then, the inner pipe 131 and the outer pipe 161 are mutually fitted in the direction of arrow A, whereby the opening 130 of the air conditioning case 102 and the opening 160 of the duct 106 are connected.
[0003]
At the connection between the air-conditioning case 102 and the duct 106, a seal portion 107 for preventing air leakage is formed. As the seal part 107, a single stick-like packing 108 having elasticity was wound so as to be substantially along the circumference of the inner pipe 131 and attached to the outer wall surface of the air-conditioning case 102, while being provided at the open end of the duct 106. The flange portion 162 is pressed against the packing 108 so that airtightness can be obtained.
[0004]
Here, it has been proposed to form the seal portion 107 such that the end portion 113 rides on the start end portion 112 of the rod-shaped packing 108 when winding the rod-shaped packing 108 (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-2002-5293
[Problems to be solved by the invention]
However, in the above-described conventional technology, the start end 112 and the end 113 of the rod-shaped packing 108 overlap each other. If the degree of pressure contact of the duct 106 with the packing 108 is weak, the packing 108 is doubled (stepped portion). ), There is a problem that the airtightness is reduced.
For example, when the degree of pressure contact is adjusted so that the degree of crushing of the packing in the thickness direction is about 50%, packing other than the step portion where the packing 108 is doubled hardly crushes, which causes a wind leak on the entire circumference. Become.
[0007]
On the other hand, when the degree of pressure contact of the duct 106 with the packing 108 is high, the stepped portion where the packing 108 is doubled pushes up the flange portion 162 of the duct 106 by its restoring force, whereby the duct 106 is lifted up and the assembled state is oblique. And may also cause wind leakage.
[0008]
In addition, it is conceivable to cut the end of the rod-shaped packing 108 so that the start end 112 and the end 113 can be abutted at the time of pasting, so that the above-mentioned stepped portion is not formed, but the number of steps is increased. Problem.
[0009]
In view of the above, it is an object of the present invention to provide a seal structure for an air passage that can make the overlapping portion substantially flat when the rod-shaped packing has an overlap and forms a seal portion.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a first air passage (2) having a first opening (30) and a first air passage (2) connected to the first opening (30) are provided. A second air passage (6) having a second opening (60) and the first and second air passages (2) so as to go around at least one of the first and second openings (30, 60). , 6) a sealing portion (7) for preventing air leakage from the abutting portions of the first and second air passages (2, 6) by means of an elastic rod-shaped packing (8) wound around the abutting portions. ), The seal structure of the air passage provided with
A recess (20) is formed in one of the first and second air passages (2, 6) at a position where the start end (12) and the end (13) of the winding of the rod-shaped packing (8) come into contact. It is characterized by being formed.
[0011]
According to the second aspect of the present invention, the first air passage (2) having the first opening (30) and the second opening (30) connected to the first opening (30) are provided. 60) and the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A sealing portion (7) for preventing air leakage from the abutting portion of the first and second air passages (2, 6) by an elastic rod-shaped packing (8) wound around the abutting portion; In the seal structure of the air passage,
A concave portion (20) is formed in one of the first and second air passages (2, 6) at a position where the terminal end (13) of the winding of the rod-shaped packing (8) overlaps the start end (12). It is characterized by doing.
[0012]
According to the third aspect of the present invention, the first air passage having the first opening and the second opening connected to the first opening. 60) and the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A sealing portion (7) for preventing air leakage from the abutting portion of the first and second air passages (2, 6) by an elastic rod-shaped packing (8) wound around the abutting portion; In the seal structure of the air passage,
A recess (20) is formed in one of the first and second air passages (2, 6) at a position where the rod-shaped packing (8) overlaps when the rod-shaped packing (8) is wound. .
[0013]
In the invention described in claim 4, the first air passage (2) having the first opening (30) and the second opening (30) connected to the first opening (30) are provided. 60) and the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A sealing portion (7) for preventing air leakage from the abutting portion of the first and second air passages (2, 6) by an elastic rod-shaped packing (8) wound around the abutting portion; In the seal structure of the air passage,
In at least one of the first and second air passages (2, 6), a recess (1) for storing the rod-shaped packing (8) in a state where the winding start end (12) and the end (13) are in contact with each other. 20) is formed.
[0014]
In the invention according to claim 5, the first air passage (2) having the first opening (30) and the second opening (30) connected to the first opening (30) are provided. 60) and the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A sealing portion (7) for preventing air leakage from the abutting portion of the first and second air passages (2, 6) by an elastic rod-shaped packing (8) wound around the abutting portion; In the seal structure of the air passage,
A recess (20) is formed at one of the first and second air passages (2, 6) at the position of the winding start end (12) of the rod-shaped packing (8).
[0015]
According to the first to fifth aspects of the present invention, even when the seal is formed so that the rod-shaped packing has an overlap when the rod-shaped packing (8) is wound, the first and second positions at the corresponding positions are formed. Since the concave portion (20) is formed in at least one of the air passages, the overlapping portion can be made substantially flat by the concave portion (20).
[0016]
It should be noted that reference numerals in parentheses of the above-described units are examples showing the correspondence with specific units described in the embodiments described later.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
(1st Embodiment)
Hereinafter, a first embodiment in which the air passage seal structure of the present invention is applied to the connection between the face openings 3a and 3b and the face ducts 6a and 6b in the automotive air conditioner 1 will be described with reference to FIGS. I do. FIG. 1 is an overall configuration diagram of the automotive air conditioner 1 according to the present embodiment, showing a state where face ducts 6a and 6b are removed, and FIG. 2 is a view showing a state where face ducts 6a and 6b are assembled. FIG. 3 is a perspective view showing the configuration of the seal portion 7, and FIG.
[0019]
First, the configuration of the vehicle air conditioner 1 according to the present embodiment will be described with reference to FIGS.
[0020]
The automotive air conditioner 1 includes an air conditioner case 2 formed of a resin material such as PP (polypropylene), and converts the air sucked into the air conditioner case 2 into an evaporator as a cooling heat exchanger (illustrated in FIG. No.), a heater core (not shown) as a heat exchanger for heating, and an air mix door (not shown) as temperature control means are adjusted to a desired temperature of the occupant.
[0021]
The conditioned air adjusted to the desired temperature is supplied to the air outlet mode (face mode, bi-level mode, foot mode) among the face openings 3a, 3b, the foot opening 4, and the defroster opening 5 formed in the air conditioning case 2. , Foot defroster mode, defroster mode).
[0022]
The face openings 3a and 3b are provided with a center face opening 3a for blowing the conditioned air toward a center face outlet (not shown) formed at a portion corresponding to the center console side in the upper body of the passenger in the vehicle cabin. And a side face opening 3b that blows out the conditioned air toward a side face air outlet (not shown) formed at a portion corresponding to the side glass side in the upper body of the passenger in the vehicle cabin. Here, the center face opening 3a and the side face opening 3b are each opened in a substantially square shape. The length of the center face opening 3a in the vehicle front-rear direction is shorter than that of the side face opening 3b.
[0023]
The foot opening 4 blows out the conditioned air toward the feet of the occupant in the passenger compartment, and the defroster opening 5 blows out the conditioned air toward the inner surface (not shown) of the vehicle windshield. .
[0024]
The face openings 3a, 3b and the face outlets are connected by face ducts 6a, 6b, respectively.
[0025]
The face ducts 6a and 6b are formed of a resin material such as PP (polypropylene), and include a center face duct 6a connected to the center face opening 3a and a side face duct 6b connected to the side face opening 3b. Consists of The upstream end openings of the face ducts 6a and 6b have substantially the same shape as the face openings 3a and 3b.
[0026]
The length of the upstream end of the center face duct 6a in the vehicle front-rear direction is shorter than that of the upstream end of the side face duct 6b.
[0027]
Further, at each connection between the face openings 3a, 3b and the face ducts 6a, 6b, seal portions 7 for preventing air leakage are provided.
[0028]
Each of the seal portions 7 is formed of one rod-shaped packing 8 having a substantially rectangular parallelepiped shape, and the rod-shaped packing 8 is made of an elastic material such as urethane foam.
[0029]
The rod-shaped packing 8 is wound so as to extend substantially along the edges of the face openings 3a and 3b. The rod-shaped packing 8 has a bent portion and a straight portion along the opening shape of the face openings 3a and 3b, and the bent portion has a curved side surface due to the elasticity of the rod-shaped packing 8. In addition, the side surface of the straight portion is flat.
[0030]
In the installation state of the rod-shaped packing 8, the lower surface and the upper surface of the rod-shaped packing 8 are fixed to the edges of the face openings 3a, 3b and the upstream ends of the face ducts 6a, 6b, respectively, for example, fixing means such as double-sided tape. Is fixed in close contact.
[0031]
In the present embodiment, the winding is completed in a state where the end portion 13 of the rod-shaped packing 8 rides on the linear portion of the rod-shaped packing 8 so as to overlap the start end 12.
[0032]
Next, the structure for mounting the face duct 6 (6a, 6b) to the face opening 30 (3a, 3b) and the structure of the seal portion 7 will be described with reference to FIGS.
[0033]
An inner tube 31 that forms a connection with the face duct 6 is formed so as to border the face opening 30 provided in the air conditioning case 2. In addition, the upstream end of the face duct 6, that is, the connection portion with the air conditioning case 2 forms an outer tube 61 of the connection portion. The face opening 30 of the air conditioning case 2 and the opening end 60 of the face duct 6 are connected by fitting the inner pipe 31 and the outer pipe 61 in the direction of arrow A in FIG.
[0034]
As described above, the seal portion 7 is formed by winding the rod-shaped packing 8 substantially along the periphery of the inner pipe 31 and attaching the same to the outer wall surface of the air-conditioning case 2, and attaching the flange portion 62 provided at the open end of the face duct 6. In a state where the packing 8 is pressed against the wound packing 8, it is tightly fixed by a fixing means such as a double-sided tape to obtain airtightness.
[0035]
Here, when winding the rod-shaped packing 8, the seal portion 7 is formed such that the end portion 13 rides on the starting end 12 of the rod-shaped packing 8. When winding the rod-shaped packing 8, the worker aligns the end of the starting end 12 of the rod-shaped packing 8 with the bottom top 21 of the recess 20 provided on the outer wall surface of the air-conditioning case 2 at the edge of the face opening 30. From this position, the rod-shaped packing 8 is bent substantially along the face opening 30, that is, the outer peripheral portion of the inner tube 31, and is attached with the end portion 13 overlapping the start end portion 12. At this time, it is preferable that the end of the end portion 13 of the rod-shaped packing 8 is attached on the concave portion 20 so as to be located on the start end side from the bent portion 12a of the rod-shaped packing (see FIG. 4).
[0036]
The depth of the recess 20 is such that when the end of the starting end 12 of the rod-shaped packing 8 is aligned with the bottom 21 of the recess 20, the end of the starting end 12 does not protrude above the recess. It is desirable that the thickness be set in accordance with the thickness of the rod-shaped packing 8.
[0037]
Also, when the protrusion 20 is formed inside the air conditioning case 2 by the recess 20, the position where the recess 20 is provided may be a position that does not interfere with the operation of the damper for selecting the openings 4 to 5 provided in the air conditioning case. Desirably, it is desirable to dispose it in a position avoiding a high air volume distribution region in consideration of an air flow distribution flowing through the inside of the air conditioning case 2 so that wind noise is not caused by the projecting portion.
[0038]
Next, the operation of the present embodiment will be described.
[0039]
When the automotive air conditioner 1 starts, the air sucked into the air conditioning case 2 is air-conditioned to a desired temperature, and selected from the face openings 3a, 3b, the foot openings 4, and the defroster openings 5 according to the blowing mode. The openings 3 to 5 are blown out toward the vehicle interior.
[0040]
Here, in the face mode or the bi-level mode, the conditioned air is blown out from the face openings 3a and 3b, and further blown out from the face outlets through the face ducts 6a and 6b to the upper body of the vehicle occupant. You. At this time, the seal portion 7 prevents air leakage at the connection between the face openings 3a, 3b and the face ducts 6a, 6b.
[0041]
According to the present embodiment described above, the seal portion 7 provided at the connection portion between each of the face openings 3a and 3b and each of the face ducts 6a and 6b is configured by the stick-shaped packing 8 having elasticity. Are provided substantially along the edges of the face openings 3a and 3b. In the installed state, the start end 12 and the end 13 of the rod-shaped packing 8 are vertically overlapped at the position of the recess 20 provided in the air-conditioning case 2. It is pasted in the state where it was made to be.
[0042]
As a result, even when the start end portion 12 and the end portion 13 of the rod-shaped packing 8 overlap when the rod-shaped packing 8 is wound and the thickness of the seal packing locally increases, the thickness is absorbed by the recess 20, The height of the seal packing can be made substantially the same over the entire winding of the rod-shaped packing 8.
[0043]
Therefore, the degree of pressure contact of the face duct 6 with the rod-shaped packing 8, that is, the degree of crushing of the packing in the thickness direction can be made substantially uniform over the entire winding of the rod-shaped packing 8, and locally. Of the air conditioning case 2 and the face duct 6 can be suppressed.
[0044]
Conventionally, the stick packing 8 was stuck on the flat portion of the air-conditioning case 2, so that it was not possible to clearly indicate the sticking start position to the sticking operator. By providing 20, the start position of packing attachment can be clearly defined.
[0045]
(2nd Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view of a main part showing an overlapping portion of the start end 12 and the end 13 of the rod-shaped packing 8, and is a view corresponding to FIG. 4 of the first embodiment. Hereinafter, differences from the first embodiment will be described.
[0046]
In the first embodiment, the rod-shaped packing 8 is wound so that the end portion 13 rides on the starting end 12 of the rod-shaped packing 8, but in the present embodiment, the inside of the concave portion 20 provided in the air-conditioning case 2 is provided. The rod-shaped packing 8 is wound so that the upper ends of the packings 8 of the start end 12 and the end 13 contact each other.
[0047]
Also according to the seal structure of the present embodiment, the overlapping portion of the starting end portion 12 and the terminal end portion 13 of the rod-shaped packing 8 is stored in the recess 20, and the height of the sealing packing is substantially the same in the entire winding of the rod-shaped packing 8. It can be.
[0048]
Therefore, similarly to the first embodiment, the degree of pressing the face duct against the rod-shaped packing 8, that is, the degree of crushing of the packing in the thickness direction can be made substantially uniform over the entire circumference of the rod-shaped packing 8 wound. It is also possible to prevent the reaction force of the rod-shaped packing 8 from locally increasing and the face duct 6 from being assembled obliquely, and to suppress wind leakage from the connection between the air conditioning case 2 and the face duct.
[0049]
In addition, the start position of packing attachment can be clearly defined by the recess 20.
[0050]
In the present embodiment, the shape of the concave portion is set according to the thickness of the rod-shaped packing 8 so that the thickness of the seal packing is not depressed at the upper end contact portion of the rod-shaped packing 8 at the start end portion 12 and the end portion 13. It is desirable. Specifically, it is desirable that the concave portion has a rectangular cross section and the bottom width thereof is set to be approximately twice or less the thickness of the rod-shaped packing 8.
[0051]
(Other embodiments)
In the first and second embodiments, the present invention relates to a face opening 3a, 3b formed in an air conditioning case 2 of a vehicle air conditioner 1, and face ducts 6a, 6b connected to the face openings 3a, 3b. The embodiment applied to the seal structure at the connection part of the above has been described. However, the present invention is not limited to this, and is applied to a seal structure at the connection part between the defroster opening 5 and the defroster duct, and a seal structure at the connection part between the duct and the duct. You may.
[0052]
Further, the arrangement position of the concave portion 20 may not be a linear portion in the winding shape of the rod-shaped packing 8, and may be a bent portion.
[0053]
Further, in the first and second embodiments, the example in which the concave portion 20 is provided on the air conditioning case 2 side is shown, but it may be provided on the duct 6 side. Further, the sticking of the rod-shaped packing 8 is not limited to the air-conditioning case side, but may be of course the duct 6 side. It is to be noted that the workability is improved by making the concave member 20 and the sticking surface of the rod-shaped packing 8 the same member.
[0054]
Further, in each of the above embodiments, the case where the rod-shaped packing 8 overlaps at the start end portion 12 and the end portion 13 has been described. However, when an overlap portion occurs during winding, the present invention is applied to the overlap portion. May be.
[0055]
Further, in each of the above embodiments, the bent portion at the edge of the opening has a square shape. However, the present invention is not limited to this. For example, the bent portion may have a round shape.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to a first embodiment, showing a state in which a face duct is removed.
FIG. 2 is an overall configuration diagram of the automotive air conditioner according to the first embodiment, showing a state where a face duct is assembled.
FIG. 3 is a perspective view illustrating a configuration of a seal unit according to the first embodiment.
FIG. 4 is a cross-sectional view of a main part showing an overlapping portion of a starting end and a terminating end of the rod-shaped packing in the first embodiment.
FIG. 5 is a cross-sectional view of a main part showing an overlapping portion of a starting end and a terminating end of the rod-shaped packing in the first embodiment.
FIG. 6 is a perspective view showing a configuration of a conventional seal portion.
[Explanation of symbols]
2 ... air-conditioning case, 30 ... face opening, 3a ... center face opening, 3b ... side face opening, 6 ... face duct, 6a ... center face duct, 6b ... side face opening, 7 ... seal part, 8 ... Bar-shaped packing, 12: start end, 13: end, 20: concave, 21: bottom top.

Claims (5)

第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造であって、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回の始端部（１２）と終端部（１３）とが接触する位置に凹部（２０）が形成されていることを特徴とする空気通路のシール構造。A first air passage (2) having a first opening (30) and a second air passage (6) having a second opening (60) connected to said first opening (30); ) And has elasticity wound around a contact portion between the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A seal structure for an air passage including a seal (7) for preventing air leakage from a contact portion of the first and second air passages (2, 6) with a rod-shaped packing (8),
A recess (20) is formed in one of the first and second air passages (2, 6) at a position where the start end (12) and the end (13) of the winding of the rod-shaped packing (8) come into contact. A seal structure for an air passage, wherein the seal structure is formed. 第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造であって、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回の終端部（１３）がその始端部（１２）に重なる位置に凹部（２０）が形成されていることを特徴とする空気通路のシール構造。A first air passage (2) having a first opening (30) and a second air passage (6) having a second opening (60) connected to said first opening (30); ) And has elasticity wound around a contact portion between the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A seal structure for an air passage including a seal (7) for preventing air leakage from a contact portion of the first and second air passages (2, 6) with a rod-shaped packing (8),
A recess (20) is formed in one of the first and second air passages (2, 6) at a position where the end portion (13) of the winding of the rod-shaped packing (8) overlaps the start end (12). A seal structure for an air passage, wherein the air passage is sealed. 第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造であって、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回において前記棒状パッキン（８）が重なる位置に凹部（２０）が形成されていることを特徴とする空気通路のシール構造。A first air passage (2) having a first opening (30) and a second air passage (6) having a second opening (60) connected to said first opening (30); ) And has elasticity wound around a contact portion between the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A seal structure for an air passage including a seal (7) for preventing air leakage from a contact portion of the first and second air passages (2, 6) with a rod-shaped packing (8),
A recess (20) is formed in one of the first and second air passages (2, 6) at a position where the rod-shaped packing (8) overlaps when the rod-shaped packing (8) is wound. Air passage seal structure. 第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造であって、
前記第１、２の空気通路（２、６）の少なくとも一方には、前記棒状パッキン（８）の巻回の始端部（１２）と終端部（１３）を接触させた状態で格納する凹部（２０）が形成されていることを特徴とする空気通路のシール構造。A first air passage (2) having a first opening (30) and a second air passage (6) having a second opening (60) connected to said first opening (30); ) And has elasticity wound around a contact portion between the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A seal structure for an air passage including a seal (7) for preventing air leakage from a contact portion of the first and second air passages (2, 6) with a rod-shaped packing (8),
In at least one of the first and second air passages (2, 6), a recess (1) for storing the rod-shaped packing (8) in a state where the winding start end (12) and the end (13) are in contact with each other. 20) A seal structure for an air passage, wherein the seal structure is formed. 第１の開口部（３０）を有する第１の空気通路（２）と、前記第１の開口部（３０）に接続される第２の開口部（６０）を有する第２の空気通路（６）と、前記第１、２の開口部（３０、６０）の少なくとも一方を周回するように前記第１、２の空気通路（２、６）同士の当接部に巻回された弾性を有する棒状パッキン（８）により前記第１、２の空気通路（２、６）の当接部からの空気漏れを防止するシール部（７）とを備えた空気通路のシール構造であって、
前記第１、２の空気通路（２、６）の一方のうち、前記棒状パッキン（８）の巻回の始端部（１２）位置に凹部（２０）が形成されていることを特徴とする空気通路のシール構造。A first air passage (2) having a first opening (30) and a second air passage (6) having a second opening (60) connected to said first opening (30); ) And has elasticity wound around a contact portion between the first and second air passages (2, 6) so as to go around at least one of the first and second openings (30, 60). A seal structure for an air passage including a seal (7) for preventing air leakage from a contact portion of the first and second air passages (2, 6) with a rod-shaped packing (8),
A concave portion (20) is formed in one of the first and second air passages (2, 6) at the position of the winding start end (12) of the rod-shaped packing (8). Passage seal structure.
JP2003007914A 2003-01-16 2003-01-16 Seal structure of air passage Expired - Fee Related JP4123943B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008308000A (en) * 2007-06-13 2008-12-25 Denso Corp Seal structure of air passage
DE102009000558A1 (en) * 2009-02-02 2010-08-12 Visteon Global Technologies, Inc., Van Buren Township Sealing arrangement for providing sealing e.g. between heat exchanger and air channel housing of air conditioning system of motor vehicle, has housing and sealing strip sealing elements sealing parts of housing relative to each other
US20170075301A1 (en) * 2015-09-15 2017-03-16 Konica Minolta, Inc. Image forming apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0925695A (en) * 1995-07-10 1997-01-28 Keiichiro Yamazaki Joint construction to strut of batten joint for civil engineering building
CN105270139A (en) * 2015-10-30 2016-01-27 博耐尔汽车电气系统有限公司 Sealing strip structure for sealing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008308000A (en) * 2007-06-13 2008-12-25 Denso Corp Seal structure of air passage
DE102009000558A1 (en) * 2009-02-02 2010-08-12 Visteon Global Technologies, Inc., Van Buren Township Sealing arrangement for providing sealing e.g. between heat exchanger and air channel housing of air conditioning system of motor vehicle, has housing and sealing strip sealing elements sealing parts of housing relative to each other
DE102009000558B4 (en) * 2009-02-02 2013-01-10 Visteon Global Technologies, Inc. Combined seal arrangement
US20170075301A1 (en) * 2015-09-15 2017-03-16 Konica Minolta, Inc. Image forming apparatus
US9791831B2 (en) * 2015-09-15 2017-10-17 Konica Minolta, Inc. Image forming apparatus

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