JP3987967B2

JP3987967B2 - Side-by-side integrated heat exchanger

Info

Publication number: JP3987967B2
Application number: JP30349297A
Authority: JP
Inventors: 邦彦西下
Original assignee: T.RAD CO., L T D.
Current assignee: T.RAD CO., L T D.
Priority date: 1997-10-17
Filing date: 1997-10-17
Publication date: 2007-10-10
Anticipated expiration: 2017-10-17
Also published as: JPH11118368A

Description

【０００１】
【発明の属する技術分野】
この発明は、複数の熱交換器を互いの熱交換部が対峙するように一体にろう付けして構成される並設一体型熱交換器に関する。
【０００２】
【従来の技術】
用途の異なる２つの熱交換器を通風方向に相前後して一体にろう付けしたものとしては、特公平７−２５２５６号公報に示される熱交換器が知られている。これは、図９に示されるように、ヒータコアＡと凝縮器Ｂとを一対のタンクＣ，Ｄ（図面においては片側のみを示す）と、これらタンク間を連通する複数のチューブＥ，Ｆと、チューブ間に介在された図示しないフィンとによってそれぞれ構成し、ヒータコアＡのタンクＣと凝縮器ＢのタンクＤとを、チューブＥ，Ｆが挿入される座板Ｇとこの座板Ｇに組付けられる断面コ字状のタンク部材Ｈ，Ｉとによって構成し、座板ＧをヒータコアＡと凝縮器Ｂとで共通の部材をもって形成し、炉中にて全体を一体ろう付けするようにしたものである。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記構成においては、チューブが挿入される座板に両熱交換器のタンク部材がろう付けされているので、ろう付け部位が両熱交換器で互いに近接し、しかもこの近接しているろう付け部分が両熱交換器のタンク部材によって挟まれた狭い空間に位置することとなり、このろう付け部分においてはろう付け不良が認められても手直しすることができないという不都合がある。また、接合部分へのフラックスの塗布も、同接合部分に対しては容易に行なうことができない。
【０００４】
そこで、この発明においては、複数の熱交換器を熱交換部を対峙させつつ一体にろう付けする構成において、少なくとも１つの熱交換器は、タンク構成部材のろう付け部分でのろう付け不良を容易に手直しすることができ、また、ろう付け部分へのフラックスの塗布も容易に行なえるようにすることを課題としている。
【０００５】
【課題を解決するための手段】
上記課題を達成するために、この発明にかかる並設一体型熱交換器は、フィンを介して積層される複数のチューブと、前記複数のチューブの積層方向に延設されて各々のチューブと連通するヘッダとを備えてなるろう付け可能な素材で構成された第１の熱交換器と、この第１の熱交換器に対して互いの熱交換部を対峙させて併設し、接続手段をもって前記第１の熱交換器と一体にろう付けされる第２の熱交換器とを少なくとも備え、前記第１の熱交換器のヘッダは、前記複数のチューブの端部が装着されるヘッダ部材を有してなり、フィンを介して積層される複数のチューブと、前記複数のチューブの積層方向に延設されて各々のチューブと連通するヘッダとを備えてなるろう付け可能な素材で構成された第１の熱交換器と、この第１の熱交換器に対して互いの熱交換部を対峙させて併設し、接続手段をもって前記第１の熱交換器と一体にろう付けされる第２の熱交換器とを少なくとも備え、前記第１の熱交換器のヘッダは、前記複数のチューブの端部が装着される第１のヘッダ部材と、前記第１のヘッダ部材にろう付されてこの第１のヘッダ部材と共に前記ヘッダの周壁を構成する第２のヘッダ部材とを有してなり、前記第１のヘッダ部材とこれにろう付けされて前記ヘッダを構成する第２の部材とのろう付け部位を、前記第１の熱交換器に隣接する前記第２の熱交換器の最外側よりも外側にずらして設けたことを特徴としている（請求項１）。
【０００６】
また、この発明にかかる並設一体型熱交換器は、フィンを介して積層される複数のチューブと、前記複数のチューブの積層方向に延設されて各々のチューブと連通するヘッダとを備えてなるろう付け可能な素材で構成された第１の熱交換器と、この第１の熱交換器に対して互いの熱交換部を対峙させて併設し、接続手段をもって前記第１の熱交換器と一体にろう付けされる第２の熱交換器とを少なくとも備え、前記第１の熱交換器のヘッダは、前記複数のチューブの端部が装着される第１のヘッダ部材と、前記第１のヘッダ部材にろう付けされてこの第１のヘッダ部材と共に前記ヘッダの周壁を構成する第２のヘッダ部材とを有してなり、前記第１のヘッダ部材は、前記チューブが挿入される装着壁部と、少なくとも前記第２の熱交換器と近接する側において前記装着壁部に続いて形成されると共に前記チューブから遠ざかる方向へ延設された側壁部とを有して構成され、前記第２の熱交換器と近接する側の側壁部と前記第２のヘッダ部材とのろう付け部位を、前記第１の熱交換器に隣接する前記第２の熱交換器のヘッダよりもチューブ長手方向外側にずらして設けたことを特徴としている（請求項２）。
【０００７】
ここで、第１の熱交換器は、ヘッダがチューブの両端に対をなして設けられるものであっても、チューブの片側にのみ設けられるものであってもよく、これに併設される第２の熱交換器も、フィンを介して積層される複数のチューブをヘッダに連通可能に接合して構成するものであってもよい。これら熱交換器は、全体をアルミニウム合金で構成し、それぞれの熱交換部が平行に配置されるように一体ろう付けする構成が実用的であり（請求項４）、コンデンサとラジエタ、ヒータコアと凝縮器等のように、異なる用途の熱交換器であっても、同様の用途として用いられるものであってもよい。
【０００８】
接続手段は、積層されたチューブのさらに外側にサイドプレートを設け、このサイドプレートによって複数の熱交換器を一体に結合するようにしても、隣り合う熱交換器でフィンを共通にして一体接合するものであってもよい。前記サイドプレートは、例えば、熱交換器毎に設けて隣り合う熱交換器で互いに突き合わせて接合するようにしても、複数の熱交換器に共通する１つの部材で構成するようにしてもよい。
【０００９】
したがって、上述のような構成とすることにより、第１の熱交換器のヘッダ部材とこれに接合する部材とのろう付け部位が、第２の熱交換器が対峙している部位よりも外側（第１の熱交換器に隣接する第２の熱交換器の最外側よりも外側、即ち、第２の熱交換器のヘッダよりも前記チューブの長手方向外側）に位置していることから、第２の熱交換器側から眺めた場合においてもこのろう付け部位が表出された状態となり、ろう付け部位の周囲に作業スペースを確保することができる。
【００１２】
さらに、第１のヘッダ部材を、チューブが挿入される装着壁部と、第２の熱交換器と近接する側だけにおいて形成される側壁部とにより断面Ｌ字状に形成し、第２のヘッダ部材を、前記装着壁部の長手方向に伸びる縁辺部から前記側壁部の長手方向に伸びる縁辺部にかけて架設する構成とし、前記側壁部とのろう付け部位を、第１の熱交換器に隣接する第２の熱交換器のヘッダよりもチューブ長手方向外側にずらして設けてもよい（請求項３）。
【００１３】
【発明の実施の形態】
以下、この発明の実施の形態を図面により説明する。図１及び図２において、熱交換器１は、その全体がアルミニウム合金で構成され、一対のヘッダ２（２ａ，２ｂ）と、この一対のヘッダを連通する複数のチューブ３と、各チューブ間に挿入接合されたコルゲート状のフィン４とを有して構成されたコンデンサ５、及び、一対のヘッダ６（６ａ，６ｂ）と、この一対のヘッダを連通する複数のチューブ７と、各チューブ間に挿入接合されたコルゲート状のフィン８とを有して構成されたラジエタ９が一体に組付けられて構成されている。
【００１４】
コンデンサ５のヘッダ２は、円筒状の筒状部材１０の両端開口部を蓋体１１で閉塞して構成され、筒状部材１０の周壁にはチューブ３を挿入する複数のチューブ挿入孔１２が形成され、内部が仕切壁１５ａ，１５ｂ，１５ｃによって仕切られて複数の流路室に画成されている。最上流側の流路室を構成するヘッダの部位には、冷媒が流入する入口部１３が設けられ、最下流側の流路室を構成するヘッダの部位には、冷媒が流出する出口部１４が設けられている。
【００１５】
図１に示す構成例にあっては、一方のヘッダ２ａが２つの仕切壁１５ａ，１５ｂによって３つの流路室に画成され、他方のヘッダ２ｂが１つの仕切壁１５ｃによって２つの流路室に画成されており、一方のヘッダ２ａに入口部１３と出口部１４とを設け、入口部１３から入った冷媒をヘッダ間を２回往復させて出口部１４から流出する構成となっている。
【００１６】
これに対して、ラジエタ９のヘッダ６は、チューブ７が挿入されるチューブ挿入孔２５が形成された装着壁部１６ａと、この装着壁部１６ａの両側縁から続いて形成され、チューブ７から遠ざかる方向へ延設された側壁部１６ｂ，１６ｃとを有する断面コ字状の第１のヘッダ部材１６と、この第１のヘッダ部材１６の側壁部間に架設され、第１のヘッダ部材１６と共にヘッダ６の周壁を構成する第２のヘッダ部材１７とによって断面矩形状の筒状体を構成し、この筒状体の両端開口部を閉塞板１８で閉塞して構成されている。
【００１７】
閉塞板１８は、筒状体の断面形状に合わせて矩形状に形成された平板からなり、対向する２辺に突起が形成され、この突起を第１のヘッダ部材１６と第２のヘッダ部材１７とに形成された嵌合孔１９に嵌合して筒状体の開口部に組付けられている。
【００１８】
第２のヘッダ部材１７には、両側縁を膨出するようにＵ字状に曲げて係止溝１７ａ，１７ｂが形成されており、この係止溝１７ａ，１７ｂに前記側壁部１６ｂ，１６ｃの長手方向（チューブの積層方向）に伸びる縁辺部を嵌入することで第１のヘッダ部材１６が組付けられている。この第１のヘッダ部材１６と第２のヘッダ部材１７との接合部分は、装着壁部１６ａから最も遠ざかる位置にあり、コンデンサ５のヘッダ２と対峙する部位よりも外側に位置している。
【００１９】
ラジエタ９の一方のヘッダ６ｂには、流体が流入する入口部２６が設けられ、他方のヘッダ６ａには、流体が流出する出口部２７が設けられており、この例にあっては、両ヘッダ６ａ、６ｂの内部が仕切られておらず、入口部２６から入った流体を一方のヘッダ６ｂから他方のヘッダ６ａへ全チューブ７を介して移動させ、しかる後に出口部２７から流出する構成となっている。
【００２０】
そして、コンデンサ５とラジエタ９とは、積層されたチューブ３，７のさらに外側においてフィンを介してサイドプレート２０，２１がそれぞれ取り付けられ、各サイドプレート２０，２１に形成されたフランジ部２０ａ，２１ａを互いに突き合わせ、その部分をろう付けすることによって両熱交換器を一体に結合している。
【００２１】
上記構成において、コンデンサ５は、一対のヘッダ２にチューブ３を挿入すると共にチューブ間にフィン４を挿入し、積層されたチューブ３のさらに外側にフィンを介してサイドプレート２０を組付ける。また、ラジエタ９は、第１のヘッダ部材１６と第２のヘッダ部材１７とを係止溝１７ａ，１７ｂに第１のヘッダ部材１６の縁辺部を嵌め込んで組付け、それと同時に閉塞板１８をヘッダ部材１６、１７の嵌合孔１９に係合して組付け、第１のヘッダ部材１６にフィン８を介して積層されたチューブ７を挿入し、積層されたチューブ７のさらに外側にフィンを介してサイドプレート２１を取り付ける。
【００２２】
しかる後に両熱交換器をサイドプレート２０，２１のフランジ部２０ａ，２１ａが当接するように平行に配置し、この状態を保つように治具にて固定する。これにより、両熱交換器は、フィンとチューブとを積層して構成される熱交換部が互いに対峙してずれることなく配置され、コンデンサのヘッダ５とラジエタのヘッダ９とは、チューブとの接合部位が横並びとなるよう非接触の状態で近隣して配置される。そして、接合部分にフラックスを塗布した後に全体を炉中にてろう付けすれば、コンデンサ５とラジエタ９とは、サイドプレート２０，２１を介して一体に結合される。
【００２３】
ラジエタ９のヘッダ６にあっては、周壁が２つの部材で構成され、これらの部材が長手方向に長く接合されることから、第１及び第２のヘッダ部材間でろう付け不良を生じることが懸念される。また、何らかの原因でこの部分の接合状態が後発的に破損する場合が想定され、これらの場合には、接合部分の手直しが必要となる。
【００２４】
従来の一体型熱交換部にあっては、第１のヘッダ部材１６と第２のヘッダ部材１７との接合部分が、隣接する他方の熱交換器と対峙する部位に位置していたため、ろう付け不良が発見されても補修作業のスペースを確保することができなかったが、本構成例においては、両ヘッダ部材１６，１７の接合部分がコンデンサ５と対峙する部位よりも外側に位置しているので、作業スペースを十分に確保することができ、手直しが容易となる。
【００２５】
また、ろう付けの際には、酸化物等の有害物を除去して部材表面を保護する等の目的でフラックスを塗布する場合が多いが、このような作業も容易に行なうことができる。
【００２６】
上記構成においては、ラジエタ９のヘッダ６を第１及び第２のヘッダ部材１６，１７と閉塞板１８とによって構成する例を示したが、図３に示されるように、第１のヘッダ部材１６にヘッダ６の両端部を閉塞する閉塞部を一体形成し、この第１のヘッダ部材１６と嵌合するよう第２のヘッダ部材１７の係止溝を全周縁に渡って形成する構成としてもよい。その他の構成は、前記構成例と同様であるので、同一箇所に同一番号を付して説明を省略する。このような構成によれば、ヘッダ６の構成部品を減らすことができると共に、組付け作業の簡易化を図ることができる。
【００２７】
尚、コンデンサ５のヘッダ２は、円筒状の筒状部材１０に限定されるものではなく、コンデンサ５においても、チューブが挿入される第１のヘッダ部材２２と、これに組付けられる第２のヘッダ部材２３とによって構成するようにしてもよい。
【００２８】
即ち、図４（ａ）に示されるように、第２のヘッダ部材２３の縁辺部を外側に膨出させて内側に段部２３ａを形成し、第１のヘッダ部材２２をこの段部２３ａに突き合わせるように組付けて第１のヘッダ部材２２の縁辺部を第２のヘッダ部材２３の縁辺部で覆うような構成としても、逆に、図４（ｂ）に示されるように、第１のヘッダ部材２２の縁辺部を外側に膨出させて内側に段部２２ａを形成し、第２のヘッダ部材２３をこの段部２２ａに突き合わせるように組付けて第２のヘッダ部材２３の縁辺部を第１のヘッダ部材２２の縁辺部で覆うような構成としてもよい。
【００２９】
ろう付け不良の手直しをコンデンサ５に対しても行なうことを予定するのであれば、図４（ｂ）に示されるように、第２のヘッダ部材２３の装着方向から眺めた場合に接合部分が表出されるようにしておくことが好ましい。
【００３０】
図５において、ラジエタ９のヘッダ６を構成する第１のヘッダ部材１６と第２のヘッダ部材１７との係合構造の変形例が示されている。図５（ａ）の例では、断面コ字状に形成された第１のヘッダ部材１６の縁辺部を外側に膨出させて内側に段部２４を形成し、これに対して、第２のヘッダ部材１７の両側縁を折り曲げて断面コ字状に形成し、第２のヘッダ部材１７の折り曲げた両側縁を段部２４に突き合わせ、第１のヘッダ部材１６の縁辺部で第２のヘッダ部材１７の側縁を覆うように組付けられている。
【００３１】
このような構成においては、第１のヘッダ部材１６の側壁部１６ｂ、１６ｃの高さや第２のヘッダ部材の折り曲げられた両側縁の高さを変更することで、第１のヘッダ部材１６と第２のヘッダ部材１７との接合部分をコンデンサ５と対峙しない範囲でヘッダ６の中程に形成することもでき、ヘッダ６の設計自由度を高めることができる。
【００３２】
また、図５（ｂ）の例では、第２のヘッダ部材１７の形状は図２で示されるものとほぼ同様であるが、第１のヘッダ部材１６の受け口部分の形状を第２のヘッダ部材１７の形状に合わせて形成したものである。図２の例では、第２のヘッダ部材１７の側縁部を断面Ｕ字状に曲げて係止溝１７ａ，１７ｂを形成するので、折り曲げ部分がどうしても直角とならずに曲面となる。このため、第１のヘッダ部材１６との間で隙間が形成しやすい構造となっており、接合面が小さくなることが懸念される。しかしながら、本構成例では、第２のヘッダ部材の形状に合わせて第１のヘッダ部材の受け口が形成されているので、第１のヘッダ部材１６と第２のヘッダ部材１７との当接面積を大きくすることができ、ろう付けの良好な歩溜りを実現することができる。
【００３３】
以上の構成では、ラジエタ５のヘッダ６を断面コ字状の第１のヘッダ部材１６と、これに架設するように設けられた第２のヘッダ部材１７とによって構成した例であるが、接合部分での作業を容易に行なう目的からは、コンデンサと近接する側の側壁部１６ｂにおいてろう付け部分が外側にあればよい。
【００３４】
このことから、図６に示されるように、ラジエタ９のヘッダ６を、チューブ７が挿入される装着壁部１６ａと、コンデンサ５と近接する側において前記装着壁部１６ａに続いて形成される側壁部１６ｂとから構成した断面Ｌ字状の第１のヘッダ部材１６と、装着壁部１６ａと側壁部１６ｂとの縁辺部に組付けられる断面Ｌ字状乃至は断面円弧状の第２のヘッダ部材１７とによってヘッダ６の周壁を構成するようにしてもよい。
【００３５】
この場合においても、第１のヘッダ部材１６と第２のヘッダ部材１７との組付け構造は種々のバリエーションが可能であり、例えば、図６に見られるように、第１のヘッダ部材１６にあっては、チューブ７が挿入される装着壁部１６ａの縁辺部を折り曲げて係止溝２８を形成し、側壁部１６ｂの縁辺部に段部２９を形成し、第２のヘッダ部材１７にあっては、一方の縁辺部を前記係止溝２８に挿入し、他方の縁辺部を前記段部２９に突き合わせるような構成としてもよい。
【００３６】
また、図７に示されるように、第１及び第２のそれぞれのヘッダ部材１６，１７に、一方の縁辺部に係止溝を設け、他方の縁辺部を相手方のヘッダ部材に設けられた係止溝に嵌合する構成としてもよい。
【００３７】
図７（ａ）では、第１のヘッダ部材１６のチューブ７が挿入される装着壁部１６ａと、この装着壁部１６ａと対向する第２のヘッダ部材１７の壁部１７ａとに係止溝２８、３０を形成し、第１のヘッダ部材１６の側壁部１６ｂを係止溝３０に嵌入すると共に、第２のヘッダ部材の前記壁部１７ａに続いて形成された側壁部１７ｂを係止溝２８に嵌入するようにしている。また、図７（ｂ）では、図７（ａ）と同様の構成を備え、これに加えて、係止溝２８、３０が形成されている縁辺部とこの係止溝２８，３０に嵌入される側壁部１６ｂ、１７ｂの縁辺部とに凸部又は凹部を設け、側壁部１６ｂ、１７ｂの縁辺部を係止溝２８，３０に押し込むことで係止溝２８，３０を構成する縁辺部を押し広げ、奥まで押し込んだ時点で互いの凸部又は凹部を噛み合わせて脱落を防止できる構成となっている。
【００３８】
尚、上述の構成では、最良の態様としてコンデンサ５とラジエタ９とを一体に接合した熱交換器の例を示したが、ヒータコアと凝縮器などのように、他の熱交換器どうしを一体に接合する場合にも利用することができ、また、３つ以上の熱交換器を接合する場合でも、少なくとも１つの熱交換器のヘッダのろう付け部分を対向する熱交換器との対峙部分よりも外側に位置させる構成としてもよい。
【００３９】
さらに上記構成では、コンデンサ５とラジエタ９とを別々の構成部品を組付けて構成し、各々のサイドプレート２０，２１を突き合わせて一体ろう付けする構成であったが、図８に示されるように、接続手段としてのサイドプレート３１をコンデンサ５とラジエタ９とで一体に形成するものであっても、フィン３２をコンデンサ５とラジエタ９とで一体に形成するものであってもよい。
【００４０】
特に、ラジエタ９の温度はコンデンサ５の温度よりも高くなることから、サイドプレート２０，２１，３１をもって両熱交換器を一体に結合する上記構成の場合には、サイドプレート２０，３１をコンデンサ５の両ヘッダ２ａ，２ｂに接合しておくと、コンデンサとラジエタとの熱膨張の違いから、長期間の使用によりサイドプレート２０，３１とヘッダ２ａ，２ｂとの接合部分が疲労破壊し、このヘッダに穴があいて冷媒漏れの発生が懸念される。
【００４１】
このため、図１（ｂ）に示されるように、コンデンサ側においては、サイドプレート２０とヘッダ２ａ，２ｂとを接合せずに離すようにしておくとよい。図においては、サイドプレート２０の両端部を両ヘッダ２ａ，２ｂから離すようにしているが、強度の確保からいずれか一方の端部のみをヘッダから離し、他方の端部にあっては、ヘッダとろう接するようにしてもよい。また、このようなコンデンサ側の構成に加え、ラジエタ側においても、サイドプレート２１，３１をヘッダ６ａ，６ｂの少なくとも一方から離すようにしてもよい。
【００４２】
ここで、サイドプレート２１の端部とヘッダ６との接合が予定される構成においては、閉塞板１８を予めサイドプレート２１と一体に形成するものであってもよい。このような構成の場合には、第１のヘッダ部材１６に切り欠き乃至はスリットを設け、閉塞板１８をチューブと同方向からヘッダ６に装着できるようにしても、あるいは、第２のヘッダ部材１７を第１のヘッダ部材１６よりも長く延設し、第２のヘッダ部材１７の突き出た部分に閉塞板１８を係合させ、同時にヘッダの開口端を覆うようにしてもよい。或いは、一体に形成されたサイドプレートと閉塞板との連接部分を外側に膨出させてアーチ状に形成し、第１のヘッダ部材１６の装着壁部１６ａを跨ぐようにサイドプレート２１と閉塞板１８とを取り付けるようにしてもよい。
【００４３】
【発明の効果】
以上述べたように、この発明によれば、少なくとも第１の熱交換器と第２の熱交換器とが熱交換部を対峙するように併設され、これら両熱交換器が一体にろう付けされている構成において、第１の熱交換器のヘッダを構成する第１ヘッダ部材とこれに接合する第２のヘッダ部材とのろう付け部位を、第１の熱交換器と第２の熱交換器とが互いに対峙している部位よりも外側（第１の熱交換器に隣接する第２の熱交換器の最外側よりも外側、または、第２の熱交換器のヘッダよりも前記チューブの長手方向外側）にずらして設けるようにしたので、ろう付け部位の周囲に作業スペースを確保することができ、ろう付け不良部分の手直しが容易となる。また、接合部分へのフラックスの塗布も容易となる。
【図面の簡単な説明】
【図１】図１は、本発明にかかる熱交換器の全体構成を示し、図１（ａ）は、中程の一部を省略した正面図、図１（ｂ）は、図１（ａ）の平面図である。
【図２】図２は、図１にかかる熱交換器のヘッダとその近傍を示すもので、図２（ａ）はその断面図であり、図２（ｂ）はその斜視図である。
【図３】図３は、本発明に係る熱交換器のヘッダとその近傍の他の構成例を示す斜視図であり、ラジエタのヘッダを変更した例を示す。
【図４】図４は、本発明に係る熱交換器のヘッダとその近傍の他の構成例を示す断面図であり、コンデンサのヘッダの周壁を２つの部材によって構成した例であり、図４（ａ）は、チューブを挿入する第１のヘッダ部材とこれに外嵌される第２のヘッダ部材とを備えた構成であり、図４（ｂ）は、チューブを挿入する第１のヘッダ部材とこれに内嵌される第２のヘッダ部材とを備えた構成である。
【図５】図５（ａ），（ｂ）は、本発明に係る熱交換器のヘッダとその近傍の他の構成例を示す断面図であり、ラジエタのヘッダを構成する第１のヘッダ部材と第２のヘッダ部材との係合構造を変更した例を示す。
【図６】図６は、本発明に係る熱交換器のヘッダとその近傍の他の構成例を示す断面図であり、ラジエタのヘッダを構成する第１のヘッダ部材と第２のヘッダ部材とを共にＬ字状に形成した例を示す。
【図７】図７（ａ），（ｂ）は、図６に示した構成の変形例であり、第１のヘッダ部材と第２のヘッダ部材との係合構造を変更した場合を示す。
【図８】図８は、接続手段としてのサイドプレートとフィンとが両熱交換器で一体になっている構成例を示す図であり、図８（ａ）は熱交換器の斜視図であり、図８（ｂ）は図８（ａ）のＡ−Ａ線で切断した断面図である。
【図９】図９は、従来の熱交換器のヘッダとその近傍の構成を示す断面図である。
【符号の説明】
１熱交換器
２，２ａ，２ｂヘッダ
３，７チューブ
４，８，３２フィン
５コンデンサ
６，６ａ，６ｂヘッダ
９ラジエタ
１６第１のヘッダ部材
１６ａ装着壁部
１６ｂ，１６ｂ側壁部
１７第２のヘッダ部材
２０，２１，３１サイドプレート[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side-by-side integrated heat exchanger configured by integrally brazing a plurality of heat exchangers so that their heat exchange portions face each other.
[0002]
[Prior art]
A heat exchanger disclosed in Japanese Examined Patent Publication No. 7-25256 is known as one in which two heat exchangers having different uses are brazed integrally in the ventilation direction. As shown in FIG. 9, a heater core A and a condenser B are connected to a pair of tanks C and D (only one side is shown in the drawing), and a plurality of tubes E and F communicating between these tanks. The tank C of the heater core A and the tank D of the condenser B are each assembled by a fin (not shown) interposed between the tubes, and the seat plate G into which the tubes E and F are inserted and the seat plate G. It is constituted by tank members H and I having a U-shaped cross section, and a seat plate G is formed by a common member for the heater core A and the condenser B, and the whole is integrally brazed in the furnace. .
[0003]
[Problems to be solved by the invention]
However, in the above configuration, since the tank members of both heat exchangers are brazed to the seat plate into which the tube is inserted, the brazed parts are close to each other in both heat exchangers, and will be close to each other. The brazed part is located in a narrow space sandwiched between the tank members of both heat exchangers, and there is a disadvantage that it cannot be repaired even if a brazing defect is recognized in this brazed part. Further, the application of flux to the joint portion cannot be easily performed on the joint portion.
[0004]
Therefore, in the present invention, in a configuration in which a plurality of heat exchangers are brazed together while facing the heat exchange portion, at least one heat exchanger can easily cause a brazing failure at a brazed portion of the tank component. It is an object of the present invention to make it possible to rework and to easily apply the flux to the brazed portion.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a side-by-side integrated heat exchanger according to the present invention includes a plurality of tubes stacked via fins, and extends in the stacking direction of the plurality of tubes to communicate with each tube. A first heat exchanger composed of a brazing material comprising a header and a heat exchanging part facing each other with respect to the first heat exchanger, and having a connection means At least a second heat exchanger brazed together with the first heat exchanger, and the header of the first heat exchanger has a header member to which ends of the plurality of tubes are attached. And a plurality of tubes stacked via fins, and a header that extends in the stacking direction of the plurality of tubes and communicates with each tube. 1 heat exchanger and this first heat exchange At least a second heat exchanger that is brazed together with the first heat exchanger with a connecting means, and the first heat exchange The header of the container is a first header member to which end portions of the plurality of tubes are attached, and a second header which is brazed to the first header member and forms a peripheral wall of the header together with the first header member And a brazing portion between the first header member and a second member brazed to the second member constituting the header is adjacent to the first heat exchanger. The second heat exchanger is provided so as to be shifted from the outermost side to the outer side (Claim 1).
[0006]
The side-by-side integrated heat exchanger according to the present invention includes a plurality of tubes stacked via fins, and a header that extends in the stacking direction of the plurality of tubes and communicates with each tube. A first heat exchanger composed of a brazing material to be formed, and the first heat exchanger having a heat exchange portion facing each other with respect to the first heat exchanger, and having a connecting means, the first heat exchanger A second heat exchanger that is brazed integrally with the first heat exchanger, wherein the header of the first heat exchanger includes a first header member to which ends of the plurality of tubes are attached, and the first heat exchanger. And a second header member that constitutes a peripheral wall of the header together with the first header member, and the first header member is a mounting wall into which the tube is inserted. And at least the second heat exchanger And a side wall portion that is formed subsequent to the mounting wall portion and extends in a direction away from the tube, and a side wall portion adjacent to the second heat exchanger, The brazing part with the 2nd header member was shifted and provided in the tube longitudinal direction outside rather than the header of the 2nd heat exchanger adjacent to the 1st heat exchanger. 2).
[0007]
Here, the first heat exchanger may be provided with a pair of headers at both ends of the tube, or may be provided only on one side of the tube. This heat exchanger may also be configured by joining a plurality of tubes stacked via fins so as to communicate with the header. These heat exchangers are composed of an aluminum alloy as a whole, and are practically brazed integrally so that the respective heat exchanging portions are arranged in parallel (Claim 4 ), and the condenser and the radiator, the heater core and the condenser are condensed. Even if it is a heat exchanger of a different use like an oven, it may be used for the same use.
[0008]
The connecting means is provided with a side plate on the outer side of the stacked tubes, and even if a plurality of heat exchangers are integrally coupled by this side plate, the fins are shared by adjacent heat exchangers and integrally joined. It may be a thing. For example, the side plate may be provided for each heat exchanger and may be abutted and joined to each other by adjacent heat exchangers, or may be configured by one member common to a plurality of heat exchangers.
[0009]
Therefore, by setting it as the above structures, the brazing site | part of the header member of a 1st heat exchanger and the member joined to this is outside the site | part which the 2nd heat exchanger has opposed ( Since it is located outside the outermost side of the second heat exchanger adjacent to the first heat exchanger, that is, outside the header of the second heat exchanger in the longitudinal direction of the tube, Even when viewed from the side of the heat exchanger 2, the brazed part is exposed, and a work space can be secured around the brazed part.
[0012]
Further, the first header member is formed in an L-shaped cross section by a mounting wall portion into which the tube is inserted and a side wall portion formed only on the side close to the second heat exchanger, and the second header The member is constructed to extend from an edge portion extending in the longitudinal direction of the mounting wall portion to an edge portion extending in the longitudinal direction of the side wall portion, and a brazing portion with the side wall portion is adjacent to the first heat exchanger. The second heat exchanger may be provided so as to be shifted outward in the tube longitudinal direction from the header of the second heat exchanger (claim 3 ).
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the heat exchanger 1 is entirely composed of an aluminum alloy, and a pair of headers 2 (2a, 2b), a plurality of tubes 3 communicating with the pair of headers, and between the tubes. A capacitor 5 having a corrugated fin 4 inserted and joined, a pair of headers 6 (6a, 6b), a plurality of tubes 7 communicating the pair of headers, and a space between the tubes. A radiator 9 having a corrugated fin 8 inserted and joined is integrally assembled.
[0014]
The header 2 of the capacitor 5 is configured by closing both end openings of a cylindrical tubular member 10 with lids 11, and a plurality of tube insertion holes 12 for inserting the tubes 3 are formed in the peripheral wall of the tubular member 10. The interior is partitioned by partition walls 15a, 15b, and 15c and is defined by a plurality of flow path chambers. The inlet portion 13 into which the refrigerant flows is provided at the header portion constituting the most upstream flow passage chamber, and the outlet portion 14 through which the refrigerant flows out at the header portion constituting the most downstream flow passage chamber. Is provided.
[0015]
In the configuration example shown in FIG. 1, one header 2a is defined by three partition walls 15a and 15b into three flow path chambers, and the other header 2b is defined by two partition walls 15c. The inlet portion 13 and the outlet portion 14 are provided in one header 2a, and the refrigerant entering from the inlet portion 13 is reciprocated twice between the headers and flows out from the outlet portion 14. .
[0016]
On the other hand, the header 6 of the radiator 9 is formed continuously from the mounting wall portion 16a in which the tube insertion hole 25 into which the tube 7 is inserted is formed, and both side edges of the mounting wall portion 16a, and moves away from the tube 7. A first header member 16 having a U-shaped cross section having side wall portions 16 b and 16 c extending in the direction, and a header that is installed between the side wall portions of the first header member 16 together with the first header member 16. A cylindrical body having a rectangular cross section is constituted by the second header member 17 constituting the peripheral wall 6, and both end openings of the cylindrical body are closed by a closing plate 18.
[0017]
The closing plate 18 is a flat plate formed in a rectangular shape in accordance with the cross-sectional shape of the cylindrical body, and projections are formed on two opposing sides. The projections are formed by the first header member 16 and the second header member 17. And fitted into the opening of the cylindrical body.
[0018]
The second header member 17 has U-shaped bent grooves 17a and 17b so that both side edges bulge. The locking grooves 17a and 17b have the side wall portions 16b and 16c. The 1st header member 16 is assembled | attached by inserting the edge part extended in a longitudinal direction (stacking direction of a tube). The joint portion between the first header member 16 and the second header member 17 is located farthest from the mounting wall portion 16a and is located outside the portion facing the header 2 of the capacitor 5.
[0019]
One header 6b of the radiator 9 is provided with an inlet portion 26 through which a fluid flows, and the other header 6a is provided with an outlet portion 27 through which a fluid flows out. The inside of 6a, 6b is not partitioned, and the fluid entered from the inlet 26 is moved from one header 6b to the other header 6a through the entire tube 7, and then flows out from the outlet 27. ing.
[0020]
And the capacitor | condenser 5 and the radiator 9 are respectively attached to the side plates 20 and 21 via the fin on the outer side of the laminated tubes 3 and 7, and flange portions 20a and 21a formed on the side plates 20 and 21, respectively. The heat exchangers are joined together by butting them together and brazing the parts.
[0021]
In the above configuration, the capacitor 5 has the tubes 3 inserted into the pair of headers 2 and the fins 4 inserted between the tubes, and the side plates 20 are assembled to the outer sides of the stacked tubes 3 via the fins. The radiator 9 also assembles the first header member 16 and the second header member 17 by fitting the edges of the first header member 16 into the locking grooves 17a and 17b, and at the same time, installs the closing plate 18 Engage with the fitting holes 19 of the header members 16, 17, insert the tube 7 laminated on the first header member 16 via the fins 8, and place fins on the outer side of the laminated tubes 7. The side plate 21 is attached via
[0022]
Thereafter, both heat exchangers are arranged in parallel so that the flange portions 20a and 21a of the side plates 20 and 21 come into contact with each other, and are fixed with a jig so as to keep this state. As a result, the heat exchangers are arranged so that the heat exchanging portions formed by laminating the fins and the tubes are not opposed to each other and the header 5 of the condenser and the header 9 of the radiator are joined to the tubes. The parts are arranged adjacent to each other in a non-contact state so that the parts are arranged side by side. And if a whole is brazed in a furnace after apply | coating a flux to a junction part, the capacitor | condenser 5 and the radiator 9 will be couple | bonded integrally through the side plates 20 and 21. FIG.
[0023]
In the header 6 of the radiator 9, the peripheral wall is composed of two members, and these members are joined to each other in the longitudinal direction so that a brazing failure may occur between the first and second header members. Concerned. In addition, it is assumed that the joining state of this part is later damaged for some reason. In these cases, the joining part needs to be reworked.
[0024]
In the conventional integrated heat exchanging portion, the joint portion between the first header member 16 and the second header member 17 is located at a portion facing the other adjacent heat exchanger. Although a repair work space could not be secured even if a defect was found, in this configuration example, the joint portion of both header members 16 and 17 is located outside the portion facing the capacitor 5. As a result, a sufficient working space can be secured, and reworking is easy.
[0025]
In brazing, flux is often applied for the purpose of removing harmful substances such as oxides to protect the surface of the member, but such operations can be easily performed.
[0026]
In the above-described configuration, the example in which the header 6 of the radiator 9 is configured by the first and second header members 16 and 17 and the closing plate 18 has been shown. However, as shown in FIG. It is good also as a structure which forms the obstruction | occlusion part which obstruct | occludes the both ends of the header 6 integrally in this, and forms the locking groove of the 2nd header member 17 over the whole periphery so that this 1st header member 16 may be fitted. . Other configurations are the same as those in the above configuration example, and thus the same portions are denoted by the same reference numerals and description thereof is omitted. According to such a configuration, the components of the header 6 can be reduced, and the assembling work can be simplified.
[0027]
Note that the header 2 of the capacitor 5 is not limited to the cylindrical tubular member 10, and also in the capacitor 5, the first header member 22 into which the tube is inserted and the second header that is assembled to the first header member 22. You may make it comprise with the header member 23. FIG.
[0028]
That is, as shown in FIG. 4A, the edge portion of the second header member 23 bulges outward to form a step portion 23a on the inner side, and the first header member 22 is connected to the step portion 23a. As shown in FIG. 4B, the first header member 22 is assembled so as to be abutted so that the edge portion of the first header member 22 is covered with the edge portion of the second header member 23. The edge portion of the header member 22 is bulged outward to form a step portion 22a on the inside, and the second header member 23 is assembled so as to abut against the step portion 22a. It is good also as a structure which covers a part with the edge part of the 1st header member 22. FIG.
[0029]
If it is planned to fix the brazing defect to the capacitor 5 as well, as shown in FIG. 4 (b), the joint portion appears when viewed from the mounting direction of the second header member 23. It is preferable to make it come out.
[0030]
In FIG. 5, the modification of the engagement structure of the 1st header member 16 and the 2nd header member 17 which comprise the header 6 of the radiator 9 is shown. In the example of FIG. 5 (a), the edge portion of the first header member 16 formed in a U-shaped cross section is bulged outward to form a stepped portion 24 on the inner side. Both side edges of the header member 17 are bent to form a U-shaped cross section, the both side edges of the second header member 17 are butted against the stepped portion 24, and the second header member is formed at the edge of the first header member 16. It is assembled so as to cover 17 side edges.
[0031]
In such a configuration, the first header member 16 and the first header member 16 are changed by changing the height of the side wall portions 16b and 16c of the first header member 16 and the height of the bent side edges of the second header member. The joint portion between the two header members 17 can be formed in the middle of the header 6 as long as it does not face the capacitor 5, and the design flexibility of the header 6 can be increased.
[0032]
In the example of FIG. 5B, the shape of the second header member 17 is substantially the same as that shown in FIG. 2, but the shape of the receiving portion of the first header member 16 is the second header member. It is formed in accordance with the shape of 17. In the example of FIG. 2, since the side edge of the second header member 17 is bent into a U-shaped cross section to form the locking grooves 17a and 17b, the bent portions do not become right angles but become curved surfaces. For this reason, there is a concern that a gap is easily formed between the first header member 16 and the joint surface is reduced. However, in this configuration example, since the receiving port of the first header member is formed in accordance with the shape of the second header member, the contact area between the first header member 16 and the second header member 17 is reduced. The yield can be increased, and a good yield of brazing can be realized.
[0033]
The above configuration is an example in which the header 6 of the radiator 5 is configured by the first header member 16 having a U-shaped cross section and the second header member 17 provided so as to be installed on the header member 16. For the purpose of facilitating the above work, it is only necessary that the brazed portion is outside on the side wall portion 16b on the side close to the capacitor.
[0034]
Therefore, as shown in FIG. 6, the header 6 of the radiator 9 includes a mounting wall portion 16 a into which the tube 7 is inserted and a side wall formed following the mounting wall portion 16 a on the side close to the capacitor 5. A first header member 16 having an L-shaped cross section composed of a portion 16b, and a second header member having an L-shaped cross-section or an arc-shaped cross-section assembled to the edge of the mounting wall portion 16a and the side wall portion 16b. 17 may constitute the peripheral wall of the header 6.
[0035]
Even in this case, the assembly structure of the first header member 16 and the second header member 17 can be variously modified. For example, as shown in FIG. In the second header member 17, the edge portion of the mounting wall portion 16a into which the tube 7 is inserted is bent to form the locking groove 28, and the step portion 29 is formed on the edge portion of the side wall portion 16b. The one edge portion may be inserted into the locking groove 28 and the other edge portion may be abutted against the stepped portion 29.
[0036]
Further, as shown in FIG. 7, each of the first and second header members 16 and 17 is provided with a locking groove on one edge portion and the other edge portion provided on the other header member. It is good also as a structure fitted to a stop groove.
[0037]
In FIG. 7A, the locking groove 28 is formed in the mounting wall portion 16a into which the tube 7 of the first header member 16 is inserted and the wall portion 17a of the second header member 17 facing the mounting wall portion 16a. 30, the side wall 16 b of the first header member 16 is fitted into the locking groove 30, and the side wall 17 b formed following the wall 17 a of the second header member is locked into the locking groove 28. To fit into. 7B has the same configuration as that in FIG. 7A, and in addition to this, the edge portion where the locking grooves 28 and 30 are formed and the locking grooves 28 and 30 are fitted. Protrusions or recesses are provided on the edge portions of the side wall portions 16b and 17b, and the edge portions of the locking grooves 28 and 30 are pushed by pushing the edge portions of the side wall portions 16b and 17b into the locking grooves 28 and 30. When it is spread and pushed all the way to the back, the projections or recesses of each other are engaged to prevent the dropout.
[0038]
In the above configuration, an example of the heat exchanger in which the condenser 5 and the radiator 9 are integrally joined is shown as the best mode. However, other heat exchangers such as a heater core and a condenser are integrally joined. It can also be used for joining, and even when joining three or more heat exchangers, the brazed part of the header of at least one heat exchanger is more than the opposite part of the opposite heat exchanger. It is good also as a structure located in an outer side.
[0039]
Further, in the above configuration, the capacitor 5 and the radiator 9 are configured by assembling separate components, and the side plates 20 and 21 are brought into contact with each other and brazed together. However, as shown in FIG. The side plate 31 as a connecting means may be formed integrally with the capacitor 5 and the radiator 9, or the fin 32 may be formed integrally with the capacitor 5 and the radiator 9.
[0040]
In particular, since the temperature of the radiator 9 is higher than the temperature of the condenser 5, in the case of the above configuration in which both heat exchangers are integrally coupled with the side plates 20, 21, 31, the side plates 20, 31 are connected to the condenser 5. If these are joined to the headers 2a and 2b, the joint portion between the side plates 20 and 31 and the headers 2a and 2b is fatigued and destroyed due to a long-term use due to the difference in thermal expansion between the capacitor and the radiator. There is a concern about the occurrence of refrigerant leaks due to the holes.
[0041]
Therefore, as shown in FIG. 1B, on the capacitor side, the side plate 20 and the headers 2a and 2b may be separated without being joined. In the figure, both end portions of the side plate 20 are separated from the headers 2a and 2b. However, only one of the end portions is separated from the header in order to ensure the strength, and the header is disposed at the other end portion. You may make it come in contact. Further, in addition to the configuration on the capacitor side, the side plates 21 and 31 may be separated from at least one of the headers 6a and 6b on the radiator side.
[0042]
Here, in the configuration in which the end of the side plate 21 and the header 6 are planned to be joined, the closing plate 18 may be formed integrally with the side plate 21 in advance. In such a configuration, the first header member 16 is provided with a notch or a slit so that the closing plate 18 can be attached to the header 6 from the same direction as the tube, or the second header member 17 may be extended longer than the first header member 16, the closing plate 18 may be engaged with the protruding portion of the second header member 17, and the opening end of the header may be covered at the same time. Alternatively, the connecting portion between the integrally formed side plate and the closing plate is bulged outwardly to form an arch shape, and the side plate 21 and the closing plate so as to straddle the mounting wall portion 16a of the first header member 16 18 may be attached.
[0043]
【The invention's effect】
As described above, according to the present invention, at least the first heat exchanger and the second heat exchanger are provided side by side so as to oppose the heat exchange section, and both the heat exchangers are brazed together. In the configuration, the first heat exchanger and the second heat exchanger are connected to the brazing portion between the first header member constituting the header of the first heat exchanger and the second header member joined thereto . And the outside of the portion facing each other (outside of the outermost side of the second heat exchanger adjacent to the first heat exchanger, or longer than the header of the second heat exchanger) Since the working space is secured around the brazed part, the defective brazed part can be easily repaired. In addition, the flux can be easily applied to the joint portion.
[Brief description of the drawings]
FIG. 1 shows an overall configuration of a heat exchanger according to the present invention, FIG. 1 (a) is a front view in which a part of the middle is omitted, and FIG. 1 (b) is FIG. ).
2 shows a header of the heat exchanger according to FIG. 1 and the vicinity thereof, FIG. 2 (a) is a sectional view thereof, and FIG. 2 (b) is a perspective view thereof.
FIG. 3 is a perspective view showing another configuration example of the header of the heat exchanger according to the present invention and the vicinity thereof, and shows an example in which the header of the radiator is changed.
4 is a cross-sectional view showing another example of the configuration of the header of the heat exchanger according to the present invention and the vicinity thereof, and is an example in which the peripheral wall of the header of the capacitor is configured by two members. (A) is the structure provided with the 1st header member which inserts a tube, and the 2nd header member fitted by this, FIG.4 (b) is the 1st header member which inserts a tube. And a second header member fitted therein.
FIGS. 5A and 5B are cross-sectional views showing another configuration example of the header of the heat exchanger according to the present invention and the vicinity thereof, and a first header member constituting the header of the radiator The example which changed the engagement structure with the 2nd header member is shown.
FIG. 6 is a cross-sectional view showing another configuration example of the header of the heat exchanger according to the present invention and the vicinity thereof, and includes a first header member and a second header member that constitute the header of the radiator. Both are formed in an L shape.
FIGS. 7A and 7B are modifications of the configuration shown in FIG. 6 and show a case where the engagement structure between the first header member and the second header member is changed.
FIG. 8 is a view showing a configuration example in which side plates and fins as connection means are integrated by both heat exchangers, and FIG. 8 (a) is a perspective view of the heat exchanger. FIG. 8B is a cross-sectional view taken along line AA in FIG.
FIG. 9 is a cross-sectional view showing a configuration of a conventional heat exchanger header and its vicinity.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 2a, 2b Header 3, 7 Tube 4, 8, 32 Fin 5 Capacitor 6, 6a, 6b Header 9 Radiator 16 1st header member 16a Mounting wall part 16b, 16b Side wall part 17 2nd header Member 20, 21, 31 Side plate

Claims

A first heat exchange composed of a brazable material comprising a plurality of tubes stacked via fins and a header that extends in the stacking direction of the plurality of tubes and communicates with each tube. And a second heat exchanger that is provided in parallel with the first heat exchanger so that the heat exchange portions face each other and are brazed together with the first heat exchanger with connecting means. At least,
The header of the first heat exchanger includes a first header member to which end portions of the plurality of tubes are mounted , and the first header member brazed to the header of the header together with the first header member. A second header member that constitutes a peripheral wall, and a brazing portion between the first header member and the second member that constitutes the header by brazing to the first header member, A side-by-side integrated heat exchanger, wherein the heat exchanger is provided so as to be shifted outward from the outermost side of the second heat exchanger adjacent to the exchanger.

A first heat exchange composed of a brazable material comprising a plurality of tubes stacked via fins and a header that extends in the stacking direction of the plurality of tubes and communicates with each tube. And a second heat exchanger that is provided in parallel with the first heat exchanger so that the heat exchange portions face each other and are brazed together with the first heat exchanger with connecting means. At least,
The header of the first heat exchanger includes a first header member to which ends of the plurality of tubes are mounted, and the header of the header together with the first header member brazed to the first header member. A second header member constituting the peripheral wall,
The first header member is formed subsequent to the mounting wall portion into which the tube is inserted and at least on the side close to the second heat exchanger, and extends in a direction away from the tube. And a side wall portion provided,
The brazing portion between the side wall portion on the side close to the second heat exchanger and the second header member has a tube rather than the header of the second heat exchanger adjacent to the first heat exchanger. A side-by-side integrated heat exchanger characterized by being shifted outward in the longitudinal direction .

The first header member is formed in an L-shaped cross section by the mounting wall portion and a side wall portion formed only on the side close to the second heat exchanger, and the second header member is The second wall adjacent to the first heat exchanger is bridged from the edge part extending in the longitudinal direction of the mounting wall part to the edge part extending in the longitudinal direction of the side wall part. 3. The side-by-side integrated heat exchanger according to claim 2, wherein the heat exchanger is provided so as to be shifted outward in the tube longitudinal direction from the header of the heat exchanger.

The side-by-side integrated heat exchanger according to claim 1 or 2, wherein each of the first heat exchanger and the second heat exchanger has a heat exchange portion arranged in parallel.