JP4243097B2

JP4243097B2 - Heat exchanger

Info

Publication number: JP4243097B2
Application number: JP2002350978A
Authority: JP
Inventors: 博志山口; 吉田　　敬
Original assignee: Japan Climate Systems Corp
Current assignee: Japan Climate Systems Corp
Priority date: 2002-12-03
Filing date: 2002-12-03
Publication date: 2009-03-25
Anticipated expiration: 2022-12-03
Also published as: JP2004183970A

Description

【０００１】
【発明の属する技術分野】
本発明は、空調装置の冷凍サイクルの一要素を構成する熱交換器に関し、特に、複数のチューブ及びフィンを並設してなるコアの端部に各チューブと連通するタンクを配設した構造の技術分野に属する。
【０００２】
【従来の技術】
従来より、この種の熱交換器として、コアのチューブ両端部に配設されて該各チューブと連通する中空部を有するタンクを備え、その中空部をチューブ及びフィン並設方向一側と他側とに仕切ることで熱交換器内の冷媒の経路を構成するようにした車両用空調装置の熱交換器が知られている（例えば、特許文献１参照。）。
【０００３】
この特許文献１の熱交換器では、タンクとは別体に形成された仕切板をタンクの周壁部に形成されたスリットから中空部に挿入してろう付けすることにより、中空部を仕切るようにしている。
【０００４】
【特許文献１】
特開平１１―２８７５８７号公報（第４頁、第５頁、図１、図８）
【０００５】
【発明が解決しようとする課題】
ところで、一般に、部材をろう付けする場合には、ろう付け不良を防止するために、各部材の形状の設定が煩雑になり、成形が難しくなることがある。特に、前記特許文献１の熱交換器では、仕切板が複数配設されているとともに、それらがろう付けされるようになっているので、タンクを構成する各部材の成形性が悪くなる虞れがある。
【０００６】
一方、近年、冷凍サイクルの冷媒を従来のフロンから二酸化炭素に切り替えて環境への負担を軽減することが考えられており、二酸化炭素を用いる場合には、フロンを用いる場合と比べて蒸発器に作用する内圧が大幅に高くなるので、タンクの耐圧性を向上させなければならない。ところが、前記特許文献１の熱交換器では、タンクの周壁部が略平坦に形成されており、十分な耐圧性を確保するためには周壁部の厚みを厚くせざるを得ず、熱交換器の重量増加を招く。
【０００７】
本発明は斯かる点に鑑みてなされたものであり、その目的とするところは、タンク内面の形状を適切に設定することにより、重量増加を招くことなく耐圧性を十分に確保し、かつ成形性の良いタンクを得ることにある。
【０００８】
【課題を解決するための手段】
前記目的を達成するために、本発明では、タンク内面に凹状湾曲面部を連続して形成し、それらの間に中空部を仕切る仕切部を一体に設けるようにした。
【０００９】
具体的には、請求項１の発明では、複数のチューブ及びフィンが交互に並設されてなるコアと、該コアの各チューブ端部に配設され、チューブ及びフィン並設方向に延びる中空部を有し該中空部を前記各チューブに連通させたタンクとを備える熱交換器を前提とする。
【００１０】
そして、前記各チューブを、外部空気の通過方向に複数列並設し、前記タンク内面には、凹陥してなる複数の第１凹状湾曲面部をチューブ及びフィン並設方向に連続して形成し、該タンク内面の前記第１凹状湾曲面部に対向する部位には、前記複数のチューブ列に対応して凹陥してなる第２凹状湾曲面部を連続して形成し、前記タンク内面の隣り合う第１凹状湾曲面部の間には、該第１凹状湾曲面部に対向するタンク内面まで突出して前記中空部をチューブ及びフィン並設方向一側と他側とに仕切る第１仕切部を一体に設ける構成とする。
【００１１】
この構成によれば、タンク内面に第１凹状湾曲面部が連続して形成されているので、従来のタンク周壁部を略平坦に形成したものに比べてタンクの耐圧性が十分に確保され、タンク周壁部の厚みを厚くすることによる熱交換器の重量増加が抑えられる。
【００１２】
また、タンクの第１仕切部をチューブ及びフィン並設方向の任意の位置に設けることで中空部が仕切られて、熱交換器内に冷媒の経路を構成することが可能となる。この際、第１仕切部は、タンク内面に一体に設けられているので、ろう付け部品の点数が増加することはなく、タンクを構成する部材の成形性が悪くなることはない。さらに、隣り合う第１凹状湾曲面部間は、この第１凹状湾曲面部と対向するタンク内面に相対的に接近しており、そこから第１仕切部が突出しているので、仕切部の突出長さを短くすることが可能となり、例えば、プレス成形する場合には第１仕切部の成形が容易になり、よって、成形性の良いタンクが得られる。
【００１３】
また、各チューブを、外部空気の通過方向に複数列並設し、第１凹状湾曲面部に対向するタンク内面には、前記複数のチューブ列に対応して凹陥してなる第２凹状湾曲面部を連続して形成する構成としている。
【００１４】
この構成によれば、タンク内面に第２凹状湾曲面部が連続して形成されるとともに、その第２凹状湾曲面部の連続する方向と前記第１凹状湾曲面部の連続する方向とが互いに異なっているので、重量増加を招くことなくタンクの耐圧性がより一層向上する。
【００１５】
請求項２の発明では、請求項１の発明において、タンク内面の隣り合う第２凹状湾曲面部の間には、第１凹状湾曲面部まで突出して中空部を外部空気の通過方向上流側のチューブが連通する上流側空間と下流側のチューブが連通する下流側空間とに仕切る第２仕切部を一体に設ける構成とする。
【００１６】
この構成によれば、第２仕切部により、中空部が上流側空間と下流側空間とに仕切られるので、外部空気の通過方向に複数のチューブ列を有する熱交換器の冷媒経路の構成が可能となる。この際、請求項１の発明と同様に、第２仕切部は、隣り合う凹状湾曲面部の間に形成されているので、タンクの成形性が悪化することはない。
【００１７】
請求項３の発明では、請求項２の発明において、第２仕切部には、中空部の上流側空間及び下流側空間を互いに連通させる連通路を設ける構成とする。
【００１８】
この構成によれば、タンク外部に連通路を形成することなく、冷媒を上流側空間と下流側空間との間で流通させることが可能となるので、熱交換器のコンパクト化が図られる。
【００１９】
請求項４の発明では、請求項１の発明において、タンクを、コア外側に配設される第１タンク構成部材と、該第１タンク構成部材のコア内側に接合されて内部に中空部を形成する第２タンク構成部材とから構成し、第１凹状湾曲面部を、前記第１タンク構成部材に形成するとともに、第２凹状湾曲面部を、前記第２タンク構成部材に形成する構成とする。
【００２０】
この構成によれば、第１凹状湾曲面部が形成された第１タンク構成部材とは別体の第２タンク構成部材に、前記第１凹状湾曲面部と異なる方向に連続する第２凹状湾曲面部が形成されるので、両凹状湾曲面部の成形がより容易に行えるようになる。
【００２１】
請求項５の発明では、請求項４の発明において、第１タンク構成部材及び第２タンク構成部材の少なくとも一方が板材をプレス成形してなる構成とする。
【００２２】
この構成によれば、タンク構成部材をプレス加工品としてコストの低減が可能となる。
【００２３】
請求項６の発明では、請求項４の発明において、第１タンク構成部材及び第２タンク構成部材の接合面の少なくとも一方には、ろう材を層状に設ける構成とする。
【００２４】
この構成によれば、第１タンク構成部材と第２タンク構成部材とを組み付けた後、炉内に搬入することで、両部材の接合面全体が同時にろう付けされるので、製造工数の低減が図られる。
【００２５】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づいて説明する。
【００２６】
図２は、本発明の実施形態に係る熱交換器を示し、本例では熱交換器が車両用空調装置の冷凍サイクルの一要素を構成する蒸発器１である場合を示す。この蒸発器１は、上下に延びる複数のチューブ２，２，…及びフィン３，３，…を車幅方向に交互に並設してなるコア４と、該コア４の上端及び下端にそれぞれ配設されてチューブ２及びフィン３並設方向に延びる中空部Ｗを有する上側ヘッダタンク６及び下側ヘッダタンク７とを備えてなる。また、この蒸発器１は、図示しない送風機から送風された外部空気がコア４を車体前方から後方（図５に白抜きの矢印Ｙにて示す）へ通過することにより熱交換されるように車両に搭載されている。
【００２７】
前記コア４のチューブ２は、図１に示すように、外部空気の通過方向に２列並設されている。これら上流側のチューブ２ａ及び下流側のチューブ２ｂは、外部空気の通過方向に長い矩形状断面を有する扁平チューブであり、一方、各フィン３はチューブ２の上端近傍から下端近傍に亘るように形成されたコルゲートフィンであり、これらチューブ２及びフィン３は表面にろう材が層状に設けられたアルミ合金製の薄板材を成形してなる。車幅方向に隣り合うチューブ２，２の離間距離はフィン３の車幅方向の長さに対応していて、該フィン３の車幅方向両端がチューブ２，２の側面にろう付けされるようになっている。これらフィン３，３，…のうちコア４の車幅方向左端及び右端に位置するフィン３は、エンドプレート８，８によりそれぞれ保持されている。
【００２８】
前記上側及び下側ヘッダタンク６，７は、各々、コア４の車幅方向（チューブ２及びフィン３並設方向）両端に亘って延びる細長い箱状に形成されていて、コア４外側に配設される第１タンク構成部材１０と、この第１タンク構成部材１０のコア４内側に接合されて内部に前記中空部Ｗを形成する第２タンク構成部材１１とを備えている。尚、上側ヘッダタンク６と下側ヘッダタンク７とは同様に構成されているので、以下、上側ヘッダタンク６について詳しく説明する。
【００２９】
前記第１タンク構成部材１０は、そのタンク内面及び外面にろう材が層状に設けられたアルミ合金製の板材をプレス加工してなり、タンク内面には、ヘッダタンク６外方へ凹陥してなる複数の第１凹状湾曲面部１０ａ，１０ａ，…がチューブ２及びフィン３並設方向に連続して形成されている。各第１凹状湾曲面部１０ａは、車体前後方向に延びる中心線を有する円周面の一部を構成するように形成されており、第１タンク構成部材１０の車体前後方向両端に亘って延びている。隣り合う第１凹状湾曲面部１０ａ，１０ａの間は、第２タンク構成部材１１内面に相対的に接近しており、かつ車幅方向に隣り合うチューブ２，２の略中央部に位置している。図１に示すように、第１タンク構成部材１０の車体前後方向両縁部は、コア４内側へ略直角に折り曲げられていて、その両縁部の間に第２タンク構成部材１１の車体前後方向両縁部が嵌合してろう付けされるようになっている。
【００３０】
前記第２タンク構成部材１１は、前記第１タンク構成部材１０と同様に、ろう材が層状に設けられたアルミ合金製の板材をプレス加工してなり、該第１タンク構成部材１０内面と対向する内面には、上流側チューブ２ａの列及び下流側チューブ２ｂの列にそれぞれ対応してヘッダタンク６外方へ凹陥してなる２つの第２凹状湾曲面部１１ａ，１１ａが外部空気の通過方向に連続して形成されている。各第２凹状湾曲面部１１ａは、車幅方向に延びる中心線を有する円周面の一部を構成するように形成されており、第２タンク構成部材１１のチューブ２及びフィン３並設方向両端に亘って延びている。第２タンク構成部材１１には、チューブ２の外形に対応するチューブ挿入孔１１ｂ，１１ｂ，…がチューブ２，２，…の間隔に対応して形成されており、各チューブ２の端部が第２タンク構成部材１１に挿入保持されるようになっている。
【００３１】
前記上側及び下側ヘッダタンク６，７の第１タンク構成部材１０と第２タンク構成部材１１とを組み付けると、それぞれ車幅方向両端が開口（図示せず）した筒状をなし、これら開口は、図２に示すように、前記エンドプレート８，８の上端側及び下端側により閉塞されるようになっている。こうして形成された中空部Ｗは、第２タンク構成部材１１のチューブ挿入孔１１ｂに挿入されたチューブ２と連通する。
【００３２】
また、前記上側及び下側ヘッダタンク６，７の各第１タンク構成部材１０には、中空部Ｗをチューブ２及びフィン３並設方向一側と他側とに仕切る第１仕切部１０ｂが設けられている。さらに、第２タンク構成部材１１には、各中空部Ｗを外部空気の通過方向上流側のチューブ２ａが連通する上流側空間Ｗ１と下流側のチューブ２ｂが連通する下流側空間Ｗ２とに仕切る第２仕切部１１ｃが設けられており、これにより、蒸発器１内の冷媒の経路が構成されている。
【００３３】
すなわち、前記第２仕切部１１ｃは、図４に示すように、前記第２タンク構成部材１１内面の隣り合う第２凹状湾曲面部１１ａ，１１ａの間から第１タンク構成部材１０内面に当接するまで突出している。この第２仕切部１１ｃの先端は、第２タンク構成部材１１の車体前後方向両縁部と略同一面に位置している。一方、前記第１仕切部１０ｂは、図３に示すように、前記第１タンク構成部材１０内面の隣り合う第１凹状湾曲面部１０ａ，１０ａの間から第２タンク構成部材１１内面まで突出している。さらに、この第１仕切部１０ｂの先端は、第２タンク構成部材１１に形成された嵌入孔１１ｅに嵌入しており、これにより、ろう付けの際の炉内への搬入時や加熱時に第１タンク構成部材１０と第２タンク構成部材１１との位置ずれが防止される。また、この蒸発器１では、図５に概略的に示すように、前記第１仕切部１０ｂが３箇所設けられており、それらは、下側ヘッダタンク７の下流側空間Ｗ２の車幅方向右寄りの部位、上側ヘッダタンク６の下流側空間Ｗ２の車幅方向左寄りの部位及び上側ヘッダタンク６の上流側空間Ｗ１の車幅方向略中央部にそれぞれ設けられている。
【００３４】
第１タンク構成部材１０内面の車体前後方向略中央部には、図１及び図４に示すように、第２タンク構成部材１１側に突出する突出部１０ｃがチューブ２及びフィン３並設方向両端に亘って延びるように形成されており、この突出部１０ｃの先端に前記第２タンク構成部材１１の第２仕切部１１ｃ先端が当接するようになっている。また、第２仕切部１１ｃの先端には、半円状の切欠１１ｄがチューブ２及びフィン３並設方向に３つ並設されており、該各切欠１１ｄと第１タンク構成部材１０の内面との間に上流側空間Ｗ１及び下流側空間Ｗ２を互いに連通させる連通路Ｒが形成される。
【００３５】
さらに、前記第１タンク構成部材１０の突出部１０ｃは、前記第２仕切部１１ｃの切欠１１ｄ近傍に対応する箇所には形成されておらず、これにより、前記上流側空間Ｗ１及び下流側空間Ｗ２の連通路Ｒの面積が十分に確保されるようになっている。この際、各切欠１１ｄの大きさや数、第１タンク構成部材１０の突出部１０ｃの突出長さ等により、上流側空間Ｗ１と下流側空間Ｗ２との間の冷媒の流通量を変更することが可能である。尚、連通路Ｒとしては、図示しないが、第２仕切部１１ｃに貫通孔を形成するようにしてもよい。
【００３６】
前記の如く構成された蒸発器１では、図５に示すように、下側ヘッダタンク７の車幅方向右側から下流側空間Ｗ２に流入した冷媒は、該下流側空間Ｗ２の第１仕切部１０ｂよりも車幅方向右側に位置する下流側チューブ２ｂに分配された後、該チューブ２ｂを通って上側ヘッダタンク６の下流側空間Ｗ２に流入して集合する。この上側ヘッダタンク６に集合した冷媒は、下側ヘッダタンク７の下流側空間Ｗ２の第１仕切部１０ｂと上側ヘッダタンク６の下流側空間Ｗ２の第１仕切部１０ｂとの間の下流側チューブ２ｂに分配された後、該チューブ２ｂを通って下側ヘッダタンク７の下流側空間Ｗ２に集合する。その後、冷媒は、上側ヘッダタンク６の第１仕切部１０ｂよりも車幅方向左側の下流側チューブ２ｂを通って、上側ヘッダタンク６の下流側空間Ｗ２に集合し、連通路Ｒを介して上側ヘッダタンク６の上流側空間Ｗ１に流入する。該上流側空間Ｗ１に流入した冷媒は、この上流側空間Ｗ１の第１仕切部１０ｂよりも車幅方向左側の上流側チューブ２ａを通って下側ヘッダタンク７の上流側空間Ｗ１に流入し、上側ヘッダタンク６の上流側空間Ｗ１の第１仕切部１０ｂよりも車幅方向右側の上流側チューブ２ａを上方へ流れて該上流側空間Ｗ１に流入する。そして、このように蒸発器１内の経路を流れた冷媒は、上側ヘッダタンク６の上流側空間Ｗ１の車幅方向右側から流出する。
【００３７】
したがって、この実施形態に係る蒸発器１によれば、ヘッダタンク６，７の各々の内面に第１凹状湾曲面部１０ａをチューブ２及びフィン３並設方向に連続して形成したので、従来のヘッダタンクの周壁部を略平坦に形成したものに比べヘッダタンク６，７の耐圧性を十分に確保でき、よって、ヘッダタンク６，７周壁部の厚みを厚くすることによる蒸発器１の重量増加を抑制できる。
【００３８】
また、第２タンク構成部材１１の第２仕切部１１ｃにより中空部Ｗを上流側空間Ｗ１と下流側空間Ｗ２とに仕切ることができ、かつそれら各空間Ｗ１，Ｗ２をチューブ２及びフィン３並設方向の所定の位置で、第１タンク構成部材１０の第１仕切部１０ｂにより仕切ることができる。これにより、チューブ２が外部空気の通過方向に２列並設されている蒸発器１において、冷媒経路を自由に構成できる。
【００３９】
この際、第１仕切部１０ｂ及び第２仕切部１１ｃは、第１タンク構成部材１０内面及び第２タンク構成部材１１内面にそれぞれ一体に設けられているので、ろう付け部品の点数が増加することはなく、ヘッダタンク６，７を構成する各部材１０，１１の成形性が悪くなることはない。さらに、第１タンク構成部材１０内面の隣り合う第１凹状湾曲面部１０ａ，１０ａ間は、第２凹状湾曲面部１１ａに相対的に接近しており、この第１凹状湾曲面部１０ａ間に第１仕切部１０ｂを形成しているので、該第１仕切部１０ｂの突出長さを短くすることができる。これにより、第１タンク構成部材１０に第１仕切部１０ｂを一体に設けるようにしても、該第１仕切部１０ｂの成形を容易に行うことができて、第１タンク構成部材１０の成形性が悪くなることはない。また、第２タンク構成部材１１も同様に、第２仕切部１１ｃを第２凹状湾曲面部１１ａ，１１ａ間に形成するようにしており、よって、成形性の良好なヘッダタンク６，７を得ることができる。
【００４０】
また、第１タンク構成部材１０及び第２タンク構成部材１１は、板材のプレス成形品であるので、押し出し加工したものに比べてコストを低減できる。この際、ろう材が層状に設けられた板材を用いているので、第１タンク構成部材１０と第２タンク構成部材１１とを組み付けた後、炉内に搬入することで、両部材１０，１１の接合面全体を同時にかつ確実にろう付けでき、よって、製造工数を低減できる。
【００４１】
また、第１凹状湾曲面部１０ａがチューブ２及びフィン３並設方向に連続する一方、第２凹状湾曲面部１１ａが外部空気の通過方向に連続しているので、両凹状湾曲面部１０ａ，１１ａの連続する方向は直交しており、これにより、ヘッダタンク６，７の剛性が十分に確保されて、耐圧性をより一層向上できる。
【００４２】
さらに、連通路Ｒにより上側ヘッダタンク６の下流側空間Ｗ２から上流側空間Ｗ１へ冷媒を流通させるようにしているので、ヘッダタンク６外部に連通路を形成する必要がなく、蒸発器１をコンパクトにできる。
【００４３】
（他の実施形態）
尚、本発明は前記実施形態に限定されるものではなく、その他の種々の実施形態を包含するものである。すなわち、前記実施形態では、第１タンク構成部材１０をプレス加工により成形するようにしているが、これに限らず、図６及び図７に示すように、押し出し加工により成形するようにしてもよい。
【００４４】
この場合には、前記実施形態と同様に、第１タンク構成部材３０内面に、第１凹状湾曲面部３０ａがチューブ２及びフィン３並設方向に連続して形成される一方、外面がチューブ２及びフィン３並設方向に延びる略平坦面とされている。第２タンク構成部材１１は、前記実施形態と同様に構成されており、タンク内面及び外面にろう材が層状に設けられた板材のプレス加工品である。前記第１タンク構成部材３０内面には、図７（ｂ）に示すように、第２タンク構成部材１１の第２仕切部１１ｃ先端が嵌入する溝部３０ｂが形成されている。さらに、この第１タンク構成部材３０内面の隣り合う第１凹状湾曲面部３０ａ，３０ａの間には、第２タンク構成部材１１内面まで突出する第１仕切部３０ｃが形成され、該第１仕切部３０ｃは、第２タンク構成部材１１に形成された嵌入孔１１ｅに嵌入している。
【００４５】
また、第２仕切部１１ｃには、上流側空間Ｗ１と下流側空間Ｗ２とを連通させる連通路Ｒが切欠１１ｄにより形成されている。
【００４６】
この場合では、第１タンク構成部材３０を押し出し成形するようにして、部分的に肉厚を厚くしたので、大幅な重量の増加を招くことなく、ヘッダタンク６，７の耐圧性を十分に確保できる。
【００４７】
尚、前記実施形態の蒸発器１では、コア４のチューブ２が外部空気の通過方向に２列並設されているが、これに限らず、チューブ２は１列であってもよいし、３列以上並設するようにしてもよい。チューブ２が１列の場合には、第２仕切部を省略すればよい。
【００４８】
また、前記実施形態では、本発明を空調装置の蒸発器１に適用した場合について説明しているが、これに限らず、空調装置の凝縮器にも適用できる。
【００４９】
【発明の効果】
以上説明したように、請求項１の発明に係る熱交換器によると、タンク内面に複数の第１凹状湾曲面部を連続して形成したので、重量増加を招くことなくタンクの耐圧性を十分に確保でき、また、このタンク内面の隣り合う第１凹状湾曲面部の間に、タンク内部の中空部をチューブ及びフィン並設方向一側と他側とに仕切る第１仕切部を一体に設けたので、ろう付け部品の点数を増加させることなく、冷媒の経路を構成できるとともに、仕切部の突出長さを短くでき、よって、成形性の良いタンクを得ることができる。
【００５０】
また、第１凹状湾曲面部に対向するタンク内面に複数のチューブ列に対応する第２凹状湾曲面部を連続して形成するようにしたので、第２凹状湾曲面部の連続する方向と前記第１凹状湾曲面部の連続する方向とを互いに異ならせることができ、よって、重量増加を招くことなくタンクの耐圧性をより一層向上できる。
【００５１】
請求項２記載の発明によると、タンク内面の隣り合う第２凹状湾曲面部の間に、中空部を上流側空間と下流側空間とに仕切る第２仕切部を一体に設けたので、タンクの成形性を悪化させることなく、外部空気の通過方向に複数のチューブ列を有する熱交換器の冷媒経路を構成できる。
【００５２】
請求項３記載の発明によると、上流側空間及び下流側空間を互いに連通させる連通路を第２仕切部に設けるようにしたので、熱交換器をコンパクトにできる。
【００５３】
請求項４記載の発明によると、タンクを、コア外側の第１タンク構成部材と、該第１タンク構成部材のコア内側に接合されて中空部を形成する第２タンク構成部材とから構成し、第１凹状湾曲面部を前記第１タンク構成部材に形成するとともに、第２凹状湾曲面部を前記第２タンク構成部材に形成するようにしたので、互いに異なる方向に連続する第１凹状湾曲面部と第２凹状湾曲面部とを別体の第１及び第２タンク構成部材にそれぞれ形成することができ、これにより、各凹状湾曲面部をより容易に成形できる。
【００５４】
請求項５記載の発明によると、タンク構成部材をプレス加工品としてコストを低減できる。
【００５５】
請求項６記載の発明によると、第１タンク構成部材及び第２タンク構成部材の接合面の少なくとも一方にろう材が層状に設けられているので、炉内で両部材の接合面全体を同時にろう付けでき、よって、製造工数を低減できる。
【図面の簡単な説明】
【図１】上側ヘッダタンク及びチューブの車幅方向左側をフィンを省略して示す分解斜視図である。
【図２】本発明に係る蒸発器を車体後側から見た図である。
【図３】上側ヘッダタンクにおける外部空気の通過方向上流側の縦断面図である。
【図４】（ａ）は図３におけるＡ−Ａ線断面図であり、（ｂ）は図３におけるＢ−Ｂ線断面図であり、（ｃ）は図３におけるＣ−Ｃ線断面図である。
【図５】蒸発器の冷媒経路を示す概略図である。
【図６】他の実施形態に係る図３相当図である。
【図７】（ａ）は図６におけるＤ−Ｄ線断面図であり、（ｂ）は図６におけるＥ−Ｅ線断面図であり、（ｃ）は図６におけるＦ−Ｆ線断面図である。
【符号の説明】
２チューブ
２ａ上流側チューブ
２ｂ下流側チューブ
３フィン
４コア
６，７ヘッダタンク
１０第１タンク構成部材
１０ａ第１凹状湾曲面部
１０ｂ第１仕切部
１１第２タンク構成部材
１１ａ第２凹状湾曲面部
１１ｃ第２仕切部
Ｒ連通路
Ｗ中空部
Ｗ１上流側空間
Ｗ２下流側空間[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger that constitutes one element of a refrigeration cycle of an air conditioner, and in particular, has a structure in which a tank communicating with each tube is disposed at an end of a core formed by arranging a plurality of tubes and fins side by side. It belongs to the technical field.
[0002]
[Prior art]
Conventionally, as this type of heat exchanger, a tank having a hollow portion that is disposed at both ends of the tube of the core and communicates with each tube is provided, and the hollow portion is arranged on one side and the other side in the tube and fin juxtaposition direction. There is known a heat exchanger for a vehicle air conditioner that is configured to form a refrigerant path in the heat exchanger by partitioning into a heat exchanger (see, for example, Patent Document 1).
[0003]
In this heat exchanger of Patent Document 1, a partition plate formed separately from the tank is inserted into the hollow portion from the slit formed in the peripheral wall portion of the tank and brazed to partition the hollow portion. ing.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-287587 (page 4, page 5, FIGS. 1 and 8)
[0005]
[Problems to be solved by the invention]
By the way, generally, when brazing a member, in order to prevent a brazing failure, setting of the shape of each member becomes complicated and molding may be difficult. In particular, in the heat exchanger of Patent Document 1, since a plurality of partition plates are arranged and they are brazed, the moldability of each member constituting the tank may be deteriorated. There is.
[0006]
On the other hand, in recent years, it has been considered to reduce the burden on the environment by switching the refrigerant of the refrigeration cycle from conventional chlorofluorocarbons to carbon dioxide. Since the working internal pressure is significantly increased, the pressure resistance of the tank must be improved. However, in the heat exchanger of Patent Document 1, the peripheral wall portion of the tank is formed substantially flat, and in order to ensure sufficient pressure resistance, the thickness of the peripheral wall portion must be increased. Incurs an increase in weight.
[0007]
The present invention has been made in view of such points, and the object thereof is to ensure sufficient pressure resistance without causing an increase in weight by appropriately setting the shape of the inner surface of the tank, and molding. The goal is to get a good tank.
[0008]
[Means for Solving the Problems]
In order to achieve the object, in the present invention, a concave curved surface portion is continuously formed on the inner surface of the tank, and a partition portion for partitioning the hollow portion is integrally provided therebetween.
[0009]
Specifically, in the invention of claim 1, a core in which a plurality of tubes and fins are alternately arranged, and a hollow portion that is disposed at each tube end of the core and extends in the direction in which the tubes and fins are arranged. And a heat exchanger provided with a tank in which the hollow portion communicates with each tube.
[0010]
The tubes are arranged in a plurality of rows in the direction in which the external air passes , and a plurality of first concave curved surface portions that are recessed are continuously formed in the tank inner surface in the tube and fin arrangement direction, A second concave curved surface portion that is recessed corresponding to the plurality of tube rows is continuously formed in a portion of the tank inner surface that faces the first concave curved surface portion, and the tank inner surface is adjacent to the first concave curved surface portion . Between the concave curved surface portions, a first partition portion that projects to the tank inner surface facing the first concave curved surface portion and that divides the hollow portion into one side and the other side in the tube and fin juxtaposed direction is provided integrally. To do.
[0011]
According to this configuration, since the first concave curved surface portion is continuously formed on the inner surface of the tank, the pressure resistance of the tank is sufficiently secured as compared with the conventional tank peripheral wall portion formed substantially flat, An increase in the weight of the heat exchanger due to an increase in the thickness of the peripheral wall portion can be suppressed.
[0012]
Further, by providing the first partition portion of the tank at an arbitrary position in the direction in which the tubes and the fins are juxtaposed, the hollow portion is partitioned, and a refrigerant path can be configured in the heat exchanger. At this time, since the first partition is integrally provided on the inner surface of the tank, the number of brazed parts does not increase and the moldability of the members constituting the tank does not deteriorate. Furthermore, between the adjacent first concave curved surface portions is relatively close to the tank inner surface facing the first concave curved surface portion, and the first partition portion protrudes therefrom, so the protruding length of the partition portion For example, in the case of press molding, the first partition portion can be easily molded, and a tank with good moldability can be obtained.
[0013]
Also , each tube is arranged in a plurality of rows in the direction of the passage of external air, and a second concave curved surface portion that is recessed corresponding to the plurality of tube rows is formed on the tank inner surface facing the first concave curved surface portion. It is set as the structure formed continuously.
[0014]
According to this configuration, the second concave curved surface portion is continuously formed on the inner surface of the tank, and the continuous direction of the second concave curved surface portion is different from the continuous direction of the first concave curved surface portion. Therefore, the pressure resistance of the tank is further improved without causing an increase in weight.
[0015]
In the invention of claim 2, in the invention of claim 1 , between the adjacent second concave curved surface portions of the tank inner surface, a tube on the upstream side in the passage direction of the external air protrudes up to the first concave curved surface portion. The second partitioning portion that partitions the upstream space that communicates with the downstream space that communicates with the downstream tube is integrally provided.
[0016]
According to this configuration, since the hollow portion is partitioned into the upstream space and the downstream space by the second partition portion, it is possible to configure the refrigerant path of the heat exchanger having a plurality of tube rows in the direction in which the external air passes. It becomes. At this time, since the second partition portion is formed between the adjacent concave curved surface portions as in the first aspect of the invention, the formability of the tank is not deteriorated.
[0017]
According to a third aspect of the present invention, in the second aspect of the present invention, the second partition portion is provided with a communication path that allows the upstream space and the downstream space of the hollow portion to communicate with each other.
[0018]
According to this configuration, the refrigerant can be circulated between the upstream space and the downstream space without forming a communication path outside the tank, so that the heat exchanger can be made compact.
[0019]
According to a fourth aspect of the present invention, in the first aspect of the present invention, the tank is joined to the first tank constituent member disposed on the outer side of the core and the inner side of the core of the first tank constituent member to form a hollow portion therein. And the second concave curved surface portion is formed on the first tank constituent member, and the second concave curved surface portion is formed on the second tank constituent member.
[0020]
According to this configuration, the second concave curved surface portion that is continuous in a direction different from the first concave curved surface portion is formed on the second tank structural member that is separate from the first tank structural member in which the first concave curved surface portion is formed. Since it is formed, the biconcave curved surface portion can be formed more easily.
[0021]
In the invention of claim 5, in the invention of claim 4 , at least one of the first tank constituent member and the second tank constituent member is formed by press-molding a plate material.
[0022]
According to this configuration, the cost can be reduced by using the tank component as a press-processed product.
[0023]
According to a sixth aspect of the invention, in the fourth aspect of the invention, a brazing material is provided in a layered manner on at least one of the joint surfaces of the first tank constituent member and the second tank constituent member.
[0024]
According to this configuration, after assembling the first tank constituent member and the second tank constituent member, the entire joint surface of both members is brazed at the same time by carrying it into the furnace. Figured.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0026]
FIG. 2 shows a heat exchanger according to an embodiment of the present invention. In this example, the heat exchanger is an evaporator 1 that constitutes one element of a refrigeration cycle of a vehicle air conditioner. The evaporator 1 includes a core 4 formed by alternately arranging a plurality of vertically extending tubes 2, 2,... And fins 3, 3,. An upper header tank 6 and a lower header tank 7 which are provided and have a hollow portion W extending in the juxtaposed direction of the tube 2 and the fin 3 are provided. Further, the evaporator 1 is configured so that heat is exchanged when external air blown from a blower (not shown) passes through the core 4 from the front to the rear (indicated by a white arrow Y in FIG. 5). It is mounted on.
[0027]
As shown in FIG. 1, the tubes 2 of the core 4 are arranged in two rows in the direction in which external air passes. The upstream tube 2a and the downstream tube 2b are flat tubes having a rectangular cross section that is long in the direction of passage of external air, while the fins 3 are formed so as to extend from the vicinity of the upper end of the tube 2 to the vicinity of the lower end. These corrugated fins are formed by molding a thin plate material made of an aluminum alloy having a brazing material layered on the surface thereof. The separation distance between the tubes 2 and 2 adjacent in the vehicle width direction corresponds to the length of the fin 3 in the vehicle width direction, and both ends of the fin 3 in the vehicle width direction are brazed to the side surfaces of the tubes 2 and 2. It has become. Of these fins 3, 3,..., The fins 3 positioned at the left end and the right end in the vehicle width direction of the core 4 are held by end plates 8, 8, respectively.
[0028]
Each of the upper and lower header tanks 6 and 7 is formed in an elongated box shape extending across both ends of the core 4 in the vehicle width direction (the direction in which the tubes 2 and fins 3 are juxtaposed), and is disposed outside the core 4. And a second tank constituent member 11 that is joined to the inside of the core 4 of the first tank constituent member 10 to form the hollow portion W therein. Since the upper header tank 6 and the lower header tank 7 are configured in the same manner, the upper header tank 6 will be described in detail below.
[0029]
The first tank component 10 is formed by pressing a plate made of an aluminum alloy having a brazing material layered on the inner and outer surfaces of the tank, and is recessed outward from the header tank 6 on the inner surface of the tank. A plurality of first concave curved surface portions 10a, 10a,... Are continuously formed in the juxtaposed direction of the tube 2 and the fin 3. Each first concave curved surface portion 10a is formed so as to constitute a part of a circumferential surface having a center line extending in the longitudinal direction of the vehicle body, and extends across both ends of the first tank constituent member 10 in the longitudinal direction of the vehicle body. Yes. Between the adjacent first concave curved surface portions 10a, 10a is relatively close to the inner surface of the second tank constituting member 11, and is positioned at the substantially central portion of the tubes 2, 2 adjacent in the vehicle width direction. . As shown in FIG. 1, the vehicle body longitudinal direction both edges of the first tank constituent member 10 are bent at substantially right angles to the inner side of the core 4, and the vehicle body front and rear of the second tank constituent member 11 is interposed between the both edges. Both edges in the direction are fitted and brazed.
[0030]
Similar to the first tank constituent member 10, the second tank constituent member 11 is formed by pressing an aluminum alloy plate material in which a brazing material is provided in layers, and faces the inner surface of the first tank constituent member 10. Two second concave curved surface portions 11a and 11a that are recessed outward from the header tank 6 respectively corresponding to the rows of the upstream tubes 2a and the rows of the downstream tubes 2b are provided in the direction in which the external air passes. It is formed continuously. Each second concave curved surface portion 11a is formed so as to constitute a part of a circumferential surface having a center line extending in the vehicle width direction, and both ends of the second tank constituting member 11 in the juxtaposition direction of the tube 2 and the fin 3 side by side. It extends over. In the second tank constituting member 11, tube insertion holes 11b, 11b,... Corresponding to the outer shape of the tube 2 are formed corresponding to the interval between the tubes 2, 2,. The two tank constituent members 11 are inserted and held.
[0031]
When the first tank constituent member 10 and the second tank constituent member 11 of the upper and lower header tanks 6 and 7 are assembled, each end in the vehicle width direction has a cylindrical shape (not shown). As shown in FIG. 2, the end plates 8 and 8 are closed by the upper end side and the lower end side. The hollow portion W thus formed communicates with the tube 2 inserted into the tube insertion hole 11b of the second tank component 11.
[0032]
Each of the first tank constituent members 10 of the upper and lower header tanks 6 and 7 is provided with a first partition portion 10b that partitions the hollow portion W into one side and the other side in the direction in which the tubes 2 and fins 3 are juxtaposed. It has been. Further, the second tank component 11 divides each hollow portion W into an upstream space W1 in which the upstream tube 2a communicates with the external air passing direction and a downstream space W2 in which the downstream tube 2b communicates. A two-partition portion 11c is provided, and thereby a refrigerant path in the evaporator 1 is configured.
[0033]
That is, as shown in FIG. 4, the second partition portion 11 c is between the adjacent second concave curved surface portions 11 a and 11 a on the inner surface of the second tank constituent member 11 and abuts on the inner surface of the first tank constituent member 10. It protrudes. The front end of the second partition portion 11c is located on substantially the same plane as both edges of the second tank constituent member 11 in the vehicle body front-rear direction. On the other hand, as shown in FIG. 3, the first partition portion 10b protrudes from between the adjacent first concave curved surface portions 10a, 10a on the inner surface of the first tank constituent member 10 to the inner surface of the second tank constituent member 11. . Furthermore, the tip of the first partition portion 10b is fitted into a fitting hole 11e formed in the second tank component member 11, whereby the first partition 10b is brought into the furnace during brazing or when heated. Misalignment between the tank constituent member 10 and the second tank constituent member 11 is prevented. Further, in the evaporator 1, as shown schematically in FIG. 5, the first partition portion 10 b is provided at three locations, which are located on the right side in the vehicle width direction of the downstream space W <b> 2 of the lower header tank 7. Are provided at a position on the left side in the vehicle width direction of the downstream space W2 of the upper header tank 6 and at a substantially central portion in the vehicle width direction of the upstream space W1 of the upper header tank 6.
[0034]
As shown in FIGS. 1 and 4, projecting portions 10c projecting toward the second tank constituent member 11 are provided at both ends of the tube 2 and the fin 3 in the juxtaposition direction. The tip of the second partition member 11c of the second tank constituting member 11 is brought into contact with the tip of the projecting portion 10c. Further, three semicircular cutouts 11d are juxtaposed in the juxtaposition direction of the tube 2 and the fin 3 at the tip of the second partition portion 11c, and each cutout 11d and the inner surface of the first tank constituting member 10 are arranged. A communication path R that connects the upstream space W1 and the downstream space W2 to each other is formed.
[0035]
Further, the protruding portion 10c of the first tank constituent member 10 is not formed at a location corresponding to the vicinity of the notch 11d of the second partitioning portion 11c, whereby the upstream space W1 and the downstream space W2 are formed. The area of the communication path R is sufficiently secured. At this time, the flow amount of the refrigerant between the upstream space W1 and the downstream space W2 may be changed according to the size and number of the notches 11d, the protruding length of the protruding portion 10c of the first tank constituent member 10, and the like. Is possible. Note that the communication path R may be formed with a through hole in the second partition 11c, although not shown.
[0036]
In the evaporator 1 configured as described above, as shown in FIG. 5, the refrigerant flowing into the downstream space W2 from the right side in the vehicle width direction of the lower header tank 7 flows into the first partition portion 10b of the downstream space W2. After being distributed to the downstream tube 2b located on the right side in the vehicle width direction, the air flows into the downstream space W2 of the upper header tank 6 through the tube 2b and gathers. The refrigerant gathered in the upper header tank 6 is a downstream tube between the first partition portion 10b of the downstream space W2 of the lower header tank 7 and the first partition portion 10b of the downstream space W2 of the upper header tank 6. After being distributed to 2b, it gathers in the downstream space W2 of the lower header tank 7 through the tube 2b. Thereafter, the refrigerant passes through the downstream tube 2b on the left side in the vehicle width direction from the first partition 10b of the upper header tank 6 and collects in the downstream space W2 of the upper header tank 6 and passes through the communication path R to the upper side. It flows into the upstream space W1 of the header tank 6. The refrigerant flowing into the upstream space W1 flows into the upstream space W1 of the lower header tank 7 through the upstream tube 2a on the left side in the vehicle width direction with respect to the first partition 10b of the upstream space W1, The gas flows in the upstream tube 2a on the right side in the vehicle width direction from the first partition 10b of the upstream space W1 of the upper header tank 6 and flows into the upstream space W1. The refrigerant that has flowed through the path in the evaporator 1 in this way flows out from the right side in the vehicle width direction of the upstream space W1 of the upper header tank 6.
[0037]
Therefore, according to the evaporator 1 which concerns on this embodiment, since the 1st concave curved surface part 10a was continuously formed in the inner surface of each of the header tanks 6 and 7 in the tube 2 and fin 3 juxtaposed direction, the conventional header The tank tanks 6 and 7 can have sufficient pressure resistance compared to the case where the peripheral wall portions of the tanks are formed substantially flat, and thus the weight of the evaporator 1 can be increased by increasing the thickness of the peripheral walls of the header tanks 6 and 7. Can be suppressed.
[0038]
Further, the hollow portion W can be partitioned into the upstream space W1 and the downstream space W2 by the second partitioning portion 11c of the second tank constituting member 11, and these spaces W1 and W2 are arranged in parallel with the tube 2 and the fin 3 respectively. It can partition with the 1st partition part 10b of the 1st tank structural member 10 in the predetermined position of a direction. Thereby, the refrigerant path can be freely configured in the evaporator 1 in which the tubes 2 are arranged in two rows in the direction in which the external air passes.
[0039]
At this time, since the first partition portion 10b and the second partition portion 11c are integrally provided on the inner surface of the first tank component member 10 and the inner surface of the second tank component member 11, the number of brazed parts increases. No, the formability of the members 10 and 11 constituting the header tanks 6 and 7 is not deteriorated. Further, the first concave curved surface portions 10a, 10a adjacent to each other on the inner surface of the first tank constituent member 10 are relatively close to the second concave curved surface portion 11a, and the first partition is formed between the first concave curved surface portions 10a. Since the part 10b is formed, the protruding length of the first partition part 10b can be shortened. Thus, even if the first partition 10b is provided integrally with the first tank constituent member 10, the first partition 10b can be easily molded, and the formability of the first tank constituent member 10 can be improved. Will not go wrong. Similarly, in the second tank component 11, the second partitioning portion 11c is formed between the second concave curved surface portions 11a and 11a, so that the header tanks 6 and 7 having good moldability can be obtained. Can do.
[0040]
Moreover, since the 1st tank structural member 10 and the 2nd tank structural member 11 are the press-molded products of a board | plate material, cost can be reduced compared with what was extruded. At this time, since the plate material in which the brazing material is provided in layers is used, both the members 10 and 11 are assembled by assembling the first tank constituent member 10 and the second tank constituent member 11 and then carrying them into the furnace. It is possible to braze the entire joint surface simultaneously and reliably, thereby reducing the number of manufacturing steps.
[0041]
In addition, since the first concave curved surface portion 10a is continuous in the juxtaposed direction of the tube 2 and the fin 3, the second concave curved surface portion 11a is continuous in the direction in which the external air passes, so that the continuous concave concave surface portions 10a and 11a are continuous. The directions to be orthogonal are orthogonal, whereby the rigidity of the header tanks 6 and 7 is sufficiently secured, and the pressure resistance can be further improved.
[0042]
Further, since the refrigerant is circulated from the downstream space W2 to the upstream space W1 of the upper header tank 6 by the communication path R, it is not necessary to form a communication path outside the header tank 6, and the evaporator 1 is compact. Can be.
[0043]
(Other embodiments)
In addition, this invention is not limited to the said embodiment, Other various embodiment is included. That is, in the said embodiment, although the 1st tank structural member 10 is shape | molded by press work, you may make it shape | mold not only by this but by extrusion as shown in FIG.6 and FIG.7. .
[0044]
In this case, as in the above-described embodiment, the first concave curved surface portion 30a is continuously formed in the juxtaposed direction of the tube 2 and the fin 3 on the inner surface of the first tank constituting member 30, while the outer surface is the tube 2 and It is set as the substantially flat surface extended in the fin 3 juxtaposition direction. The second tank constituting member 11 is configured in the same manner as in the above-described embodiment, and is a pressed product of a plate material in which brazing materials are provided in layers on the inner and outer surfaces of the tank. As shown in FIG. 7B, a groove portion 30b into which the tip of the second partition portion 11c of the second tank component member 11 is fitted is formed on the inner surface of the first tank component member 30. Further, a first partition portion 30c that protrudes to the inner surface of the second tank constituent member 11 is formed between the adjacent first concave curved surface portions 30a and 30a on the inner surface of the first tank constituent member 30, and the first partition portion is formed. 30 c is fitted into a fitting hole 11 e formed in the second tank component 11.
[0045]
In addition, a communication path R that connects the upstream space W1 and the downstream space W2 is formed in the second partition portion 11c by a notch 11d.
[0046]
In this case, since the first tank component 30 is extruded and partially thickened, the pressure resistance of the header tanks 6 and 7 is sufficiently secured without causing a significant increase in weight. it can.
[0047]
In addition, in the evaporator 1 of the said embodiment, although the tube 2 of the core 4 is arranged in parallel by the external air passage direction, not only this but the tube 2 may be 1 row, 3 You may make it arrange in a row or more. In the case where the tubes 2 are in one row, the second partition portion may be omitted.
[0048]
Moreover, although the said embodiment demonstrated the case where this invention was applied to the evaporator 1 of an air conditioner, it is applicable not only to this but the condenser of an air conditioner.
[0049]
【The invention's effect】
As described above, according to the heat exchanger according to the first aspect of the present invention, since the plurality of first concave curved surface portions are continuously formed on the inner surface of the tank, the pressure resistance of the tank is sufficiently increased without causing an increase in weight. Since the first partition part for partitioning the hollow part inside the tank into the tube and fin juxtaposed direction side and the other side is integrally provided between the adjacent first concave curved surface parts of the tank inner surface. The refrigerant path can be configured without increasing the number of brazed parts, and the protruding length of the partitioning portion can be shortened, so that a highly moldable tank can be obtained.
[0050]
In addition , since the second concave curved surface portion corresponding to the plurality of tube rows is continuously formed on the tank inner surface facing the first concave curved surface portion, the direction in which the second concave curved surface portion continues and the first concave shape. The direction in which the curved surface portions are continuous can be made different from each other, and therefore the pressure resistance of the tank can be further improved without causing an increase in weight.
[0051]
According to the second aspect of the present invention, since the second partition part for partitioning the hollow part into the upstream space and the downstream space is integrally provided between the adjacent second concave curved surface parts of the tank inner surface, the molding of the tank The refrigerant path of the heat exchanger having a plurality of tube rows in the direction in which the external air passes can be configured without deteriorating the performance.
[0052]
According to the third aspect of the present invention, since the communication path that allows the upstream space and the downstream space to communicate with each other is provided in the second partition, the heat exchanger can be made compact.
[0053]
According to invention of Claim 4 , a tank is comprised from the 1st tank structural member of a core outer side, and the 2nd tank structural member joined inside the core of this 1st tank structural member, and forms a hollow part, Since the first concave curved surface portion is formed on the first tank constituent member and the second concave curved surface portion is formed on the second tank constituent member, the first concave curved surface portion and the first concave curved surface portion that are continuous in different directions from each other are formed. The two concave curved surface portions can be formed on the first and second tank constituent members separately from each other, whereby each concave curved surface portion can be more easily formed.
[0054]
According to the fifth aspect of the present invention, the cost can be reduced by using the tank component as a press-processed product.
[0055]
According to the invention described in claim 6 , since the brazing material is provided in a layered manner on at least one of the joint surfaces of the first tank component and the second tank component, the entire joint surfaces of both members are brazed simultaneously in the furnace. Therefore, the number of manufacturing steps can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a left side in the vehicle width direction of an upper header tank and a tube with fins omitted.
FIG. 2 is a view of the evaporator according to the present invention as viewed from the rear side of the vehicle body.
FIG. 3 is a longitudinal sectional view on the upstream side in the passage direction of external air in the upper header tank.
4A is a sectional view taken along line AA in FIG. 3, FIG. 4B is a sectional view taken along line BB in FIG. 3, and FIG. 4C is a sectional view taken along line CC in FIG. is there.
FIG. 5 is a schematic view showing a refrigerant path of an evaporator.
FIG. 6 is a view corresponding to FIG. 3 according to another embodiment.
7A is a sectional view taken along line DD in FIG. 6, FIG. 7B is a sectional view taken along line EE in FIG. 6, and FIG. 7C is a sectional view taken along line FF in FIG. is there.
[Explanation of symbols]
2 Tube 2a Upstream tube 2b Downstream tube 3 Fin 4 Core 6, 7 Header tank 10 First tank constituent member 10a First concave curved surface portion 10b First partition portion 11 Second tank constituent member 11a Second concave curved surface portion 11c First 2 partitions R communication path W hollow W1 upstream space W2 downstream space

Claims

A core in which a plurality of tubes and fins are alternately arranged, and a hollow portion that is disposed at each tube end of the core and extends in the direction in which the tubes and fins are juxtaposed, and communicates with the tubes. A heat exchanger comprising a tank
Each of the tubes is arranged in a plurality of rows in the direction in which external air passes,
On the inner surface of the tank, a plurality of first concave curved surface portions that are recessed are formed continuously in the tube and fin juxtaposed direction, and the plurality of first concave curved surface portions facing the first concave curved surface portion of the tank inner surface The second concave curved surface portion that is recessed corresponding to the tube row is continuously formed,
Between the first concave curved surface portions adjacent to the inner surface of the tank, the first protrudes up to the tank inner surface facing the first concave curved surface portion and partitions the hollow portion into one side and the other side in the tube and fin juxtaposition direction. The heat exchanger characterized by the partition part being provided integrally.

In claim 1 ,
Between the adjacent second concave curved surface portions of the tank inner surface, the upstream space in which the upstream tube communicates with the upstream tube in the passage direction of the external air and the downstream tube communicates with the hollow portion protruding to the first concave curved surface portion. A heat exchanger characterized in that a second partition part for partitioning into a side space is provided integrally.

In claim 2 ,
A heat exchanger characterized in that the second partition portion is provided with a communication passage that allows the upstream space and the downstream space of the hollow portion to communicate with each other.

In claim 1 ,
The tank is composed of a first tank constituent member disposed outside the core, and a second tank constituent member joined inside the core of the first tank constituent member to form a hollow portion therein,
The first concave curved surface portion is formed in the first tank constituent member, and the second concave curved surface portion is formed in the second tank constituent member.

In claim 4 ,
At least one of the first tank constituent member and the second tank constituent member is formed by press-molding a plate material.

In claim 4 ,
A heat exchanger, wherein a brazing material is provided in a layered manner on at least one of the joint surfaces of the first tank constituent member and the second tank constituent member.