JP2004271101A

JP2004271101A - Heat exchanger with liquid receiver

Info

Publication number: JP2004271101A
Application number: JP2003064356A
Authority: JP
Inventors: Etsuro Kubota; 悦郎久保田
Original assignee: Nikkei Heat Exchanger Co Ltd
Current assignee: Nikkei Heat Exchanger Co Ltd
Priority date: 2003-03-11
Filing date: 2003-03-11
Publication date: 2004-09-30

Abstract

<P>PROBLEM TO BE SOLVED: To reliably and firmly braze a heat exchanger body to a liquid receiver while reducing the number and weight of materials, facilitating fabricating work and allowing the liquid receiver to receive less thermal influences from the heat exchanger body. <P>SOLUTION: The heat exchanger with the liquid receiver comprises a capacitor body 1 having a plurality of heat exchange pipes 3 mounted between header pipes 2a, 2b and a flow-in port 2c and a flow-out port 2d for high temperature heat medium in the header pipes and an approximately cylindrical liquid receiver body 11 firmly brazed thereto. The liquid receiver body 11 is formed into a stepped cylindrical shape with a small diameter cylindrical portion 12, an intermediate cylindrical portion 13 having a diameter larger than that of the small diameter cylindrical portion 12 and a large diameter cylindrical portion 14 having a diameter larger than that of the intermediate cylindrical portion 13 in sequence in a range from one end to the other end of a cylindrical member with press machining. With a connection member 60 laid between the intermediate cylindrical portion 13 of the liquid receiver body 11 and the header pipe 2a, the liquid receiver body 11 is firmly brazed to the header pipe 2a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、受液器付き熱交換器に関するもので、更に詳細には、例えば自動車に設置する空調設備に組み込まれるアルミニウム製の受液器付き熱交換器に関するものである。ここで、アルミニウムとは、アルミニウム又はアルミニウム合金を含む意味である。
【０００２】
【従来の技術】
従来、この種の熱交換器には、それぞれがアルミニウム製の一対の略円筒状のヘッダーパイプと、これらヘッダーパイプ間に架設される互いに平行な複数の熱交換管と、隣接する熱交換管間に介在されるフィンとを具備する熱交換器本体と、アルミニウム製の略円筒状の受液器本体とをろう付けにより結合固定する構造のものが一般的に知られている。
【０００３】
従来では、受液器本体には、円筒部とヘッダーパイプに接する形状を有する足部（接合部）とを有する断面形状のアルミニウム製押出形材を、必要な長さに切断した後、足部のヘッダーパイプとの必要接合部を残して切削成形したものが使用されている。このように形成された受液器本体の足部の切削部分は、ヘッダーパイプの高温部（高温の熱媒体が流入される領域部）に接する部分と、フィルタ及びシールキャップを嵌合（挿入）する部分に対応している（例えば、特許文献１参照）。
【０００４】
【特許文献１】
特開２００２−１９５７０１（段落番号００３７〜００４２、図１、図５）
上記のように、受液器本体の足部を切削する理由は、第１には、ヘッダーパイプの高温部に接する部分は、熱交換器本体の高温部の熱量が受液器に伝導し、折角冷却して液化した熱媒体（冷媒）を再気化させ、冷却効率を低下させるため、この部分の削除を行う必要があるからである。第２には、フィルタ及びシールキャップを挿入する範囲は、シール性を向上させるため、内径を切削すると共に、円筒部内面を均一に拡径することで内径寸法及び面粗度の微調整を図るためである。
【０００５】
【発明が解決しようとする課題】
ところで、円筒部と足部とを有するアルミニウム製の押出形材から足部の不要部分を切削するものにおいては、円筒部と足部とを有する断面形状で押し出すと、円筒部の足部と、それに対応する部位の肉厚が偏肉してバランスが取れないため、円筒部の肉厚を余分にとっている。このため、フィルタ及びシールパッキンの挿入部の肉厚を切削して調整する必要が生じる。また、このことは、受液器全体の重量に対して円筒部の重量が必要以上に重いため、製品の種類によって円筒部全体の肉厚を薄くすることが必要になってくる。
【０００６】
したがって、従来の受液器本体においては、重量の軽量化とシールキャップの取付の両面から円筒部及び足部を切削する必要があるため、切削作業が面倒であった。しかも、重量の軽量化を重視すると、ろう付け面積が狭小して結合強度が不十分になる虞がある。また、受液器本体の径が変更された場合には、新規の押出形材を成形しなければならないという問題もあった。
【０００７】
この発明は上記事情に鑑みなされたもので、材料の削減及び重量の軽量化が図れると共に、作製作業を容易にし、かつ、受液器が熱交換器本体から受ける熱的影響を低減すると共に、熱交換器本体と受液器とのろう付け結合を確実かつ強固に行えるようにした受液器付き熱交換器を提供しようとするものである。
【０００８】
【課題を解決するための手段】
上記課題を解決するために、請求項１記載の発明は、アルミニウム製の一対のヘッダーパイプ間に互いに平行に複数の熱交換管を架設してなり、ヘッダーパイプに高温の熱媒体の流入口及び流出口を有する熱交換器本体と、アルミニウム製の略円筒状の受液器本体とをろう付けにより結合固定してなる受液器付き熱交換器において、上記受液器本体は、プレス加工によって円筒状部材の一端から他端に向かって、小径筒部、該小径筒部より大径の中間筒部及び該中間筒部より大径の大径筒部を有する段付円筒状に形成され、上記受液器本体における上記中間筒部と上記ヘッダーパイプとの間にアルミニウム製の連結部材を介在させて、受液器本体とヘッダーパイプとをろう付けにより結合固定してなる、ことを特徴とする。
【０００９】
請求項２記載の発明は、請求項１記載の受液器付き熱交換器において、上記連結部材は、略平坦状の基部の一側面に、ヘッダーパイプの接合面に当接するヘッダーパイプ側接合面を設け、他側面に、受液器本体の中間筒部の接合面に当接する受液器本体側接合面を設けた板状部材と、上記ヘッダーパイプ及び受液器本体に設けられた熱媒体の流出用及び流入用の連通口に嵌合可能な連通部とを具備してなる、ことを特徴とする。
【００１０】
請求項１記載の発明によれば、受液器本体は、プレス加工によって円筒状部材の一端から他端に向かって、小径筒部、該小径筒部より大径の中間筒部及び該中間筒部より大径の大径筒部を有する段付円筒状に形成することにより、円筒部と足部とを有する押出形材から足部及び円筒内面の不要部分を切削する構造に比べて材料の削減が図れると共に、重量の軽量化が図れ、かつ、受液器本体の作製作業の簡略化が図れる。しかも、受液器本体の径が変更された場合においても、プレス加工での拡径を変えるのみで対応が可能となる。
【００１１】
また、受液器本体における中間筒部とヘッダーパイプとの間にアルミニウム製の連結部材を介在させて、受液器本体とヘッダーパイプとをろう付けにより結合固定することにより、ヘッダーパイプと受液器本体の小径筒部との間の隙間を広く取ることができるので、熱交換器本体の高温部分から受ける受液器の熱的影響を低減することができると共に、熱交換効率の向上を図ることができる。
【００１２】
請求項２記載の発明によれば、連結部材は、略平坦状の基部の一側面に、ヘッダーパイプの接合面に当接するヘッダーパイプ側接合面を設け、他側面に、受液器本体の中間筒部の接合面に当接する受液器本体側接合面を設けた板状部材と、ヘッダーパイプ及び受液器本体に設けられた熱媒体の流出用及び流入用の連通口に嵌合可能な連通部とを具備することにより、連結部材と熱交換器本体及び受液器本体との接合部の面積を直線状に広く取ることができるので、ろう付けを確実かつ強固にすることができる。
【００１３】
【発明の実施の形態】
以下、この発明に係る受液器付き熱交換器の実施形態を図面に基づいて詳細に説明する。
【００１４】
図１は、この発明に係る受液器付き熱交換器の一例を示す正面図（ａ）及び（ａ）の要部を示す平面図（ｂ）、図２は、上記熱交換器の要部拡大断面図、図３は、この発明における連結部材を示す平面図（ａ）及び（ａ）のＩ−Ｉ線に沿う断面図（ｂ）、拡大側面図（ｃ）及び（ｂ）の要部拡大断面図（ｄ）である。
【００１５】
上記熱交換器である凝縮器（コンデンサ）は、図１に示すように、それぞれがアルミニウム製の一対のヘッダーパイプ２ａ，２ｂと、これらのへッダーパイプ２ａ，２ｂ間に架設される複数の熱交換管３と、各熱交換管３の間に介設されると共に、一体に接合される熱交換用フィン例えばコルゲートフィン４とを具備する熱交換器本体１（以下に、コンデンサ本体１という）と、アルミニウム製の受液器本体１１を具備する受液器１０とで主に構成されている。この場合、コンデンサ本体１と受液器本体１１とはアルミニウム製の連結部材６０を介して一体ろう付けされている。
【００１６】
上記ヘッダーパイプ２ａ，２ｂは、例えばアルミニウム製の押出形材にて略円筒状に形成されており、その上下端部にはアルミニウム製のキャップ部材５がろう付けにより被着固定されている。また、一方のヘッダーパイプ２ａ（図１において左側）の例えば外方側上端付近には高温の熱媒体の流入ロ２ｃが設けられており、他方のヘッダーパイプ２ｂ（図１において右側）の外方側下端付近には、熱媒体の流出口２ｄが設けられている。更に、ヘッダーパイプ２ａの側面には、図２に示すように、上記受液器１０と連通するために、熱媒体の流出用及び流入用の連通口を構成する流出孔９ａ及び流入孔９ｂが穿設されており、これらの流出孔９ａ及び流入孔９ｂと連通するようにして、連結部材６０を介して受液器１０がヘッダーパイプ２ａに一体的にろう付されている。
【００１７】
なお、ヘッダーパイプ２ａにおける上部側の約１／３の箇所に仕切板２ｅが配設され、流出孔９ａ側と流入孔９ｂ側との間には仕切板２ｆが設けられている。また、ヘッダーパイプ２ｂにおける下部側の仕切板２ｆと対応する位置には、仕切板２ｇが配設されている。
【００１８】
このように、ヘッダーパイプ２ａ，２ｂに仕切板２ｅ，２ｆ，２ｇを配設することにより、流入孔２ｃからヘッダーパイプ２ａ内に流入する高温高圧の熱媒体が仕切板２ｅより上方の過熱域１Ａ（高温領域）の熱交換管３内を流れて、ヘッダーパイプ２ｂ内へ流れる。この際、気体状態で熱交換が行われ、熱媒体の温度が降下する。ヘッダーパイプ２ｂ内へ流れた熱媒体は、仕切板２ｅと２ｆ及び２ｇの間の凝縮域１Ｂ（気液２相領域）の熱交換管３内を流れて再びヘッダーパイプ２ａ内へ流れる。この際、潜熱の熱交換が行われ、１００％気体状態から１００％液体状態に変化する。なお、この領域では相変化に伴う温度変化はない。ヘッダーパイプ２ａ内に流れた液体状態の熱媒体は流出孔９ａを介して受液器本体１１内に流れ、受液器１０によって気液分離された後、液体状態の熱媒体は流入孔９ｂを介して仕切板２ｆ，２ｇより下方の過冷却域１Ｃ（サブクール域）の熱交換管３内を流れてヘッダーパイプ２ｂ内へ流れる。この際、熱媒体は液体状態で熱交換が行われ、温度が降下する。
【００１９】
また、熱交換管３は、図１（ａ）に示すように、アルミニウム製の押出形材にて例えば偏平な板状に形成されており、その内部には長手方向に向かって貫通する複数に区画された熱媒体の流路（図示せず）が形成されている。このように形成される熱交換管３の両端部は、両ヘッダーパイプ２ａ，２ｂ側面の対向する側に、適宜間隔をおいて互いに平行に配列される複数のスリット（図示せず）に挿入固着されている。
【００２０】
上記熱交換用フィンすなわちコルゲートフィン４は、図１（ａ）に示すように、アルミニウム製の板材を屈曲することにより連続波形状に形成されており、各熱交換管３の間に介設されてろう付されている。この場合、最上段及び最下段に配設された熱交換管３の外方側にもコルゲートフィン４がろう付接合されており、これらの両コルゲートフィン４を保護するために、両コルゲートフィン４の更に外方側にはサイドプレート４ａがろう付接合されている。
【００２１】
上記受液器１０は、図２に示すように、例えば、アルミニウム製の押出形材にて形成された円筒状部材を、後述するプレス加工によって多段状に形成された受液器本体１１を具備している。この受液器本体１１を成形するには、図５に示すように、まず、アルミニウム製の円筒状の押出形材を適宜長さに切断して円筒状部材１１Ａを用意する（図５（ａ）参照）。次に、円筒状部材１１Ａをプレス装置（図示せず）にセットして、円筒状部材１１Ａの一端に向かって一端の筒部（小径筒部）１２の内径より大径の円柱状成形型ＰＡを圧挿して円筒状部材１１Ａを拡径して、先端（一端）の小径筒部１２に連なる中間筒部１３を成形する（図５（ｂ）参照）。中間筒部１３を成形した後、他端から中間筒部１３の内径より大径の円柱状成形型ＰＢを圧挿して円筒状部材１１Ａを更に拡径して、中間筒部１３に連なる大径筒部１４を成形する（図５（ｃ）参照）。これにより、受液器本体１１は、一端から他端に向かって漸次径が拡径する小径筒部１２、中間筒部１３及び大径筒部１４を有する多段筒状に形成される。
【００２２】
上記のようにして受液器本体１１を成形することにより、円筒部と足部とを有するアルミニウム製押出形材から足部及び円筒内面の不要部を削除すると共に、一端に拡径部を成形するものに比べて材料の削減が図れると共に、重量の軽量化が図れ、かつ、作製作業の簡略化が図れると共に、量産化が図れる。なお、受液器本体１１の径が変更された場合においても、同一の円筒状部材１１Ａに対してプレス成形型ＰＡ，ＰＢの径を変えるのみで対応することができる。
【００２３】
また、上記受液器本体１１は、図２に示すように、ヘッダーパイプ２ａ内における仕切板２ｆの上側における位置には、ヘッダーパイプ２ａの流出孔９ａと連通する流出口１８が形成されている。また、ヘッダーパイプ２ａ内における仕切板２ｆの下側におけるヘッダーパイプ２ａの流入孔９ｂと一致する位置には、流入口１９が形成されている。
【００２４】
上記のように形成された受液器本体１１の一端（上端）の小径筒部１２の開口端には、キャップ１５が閉塞されている。このキャップ１５はアルミニウム製部材にて形成されており、例えばろう付けによって受液器本体１１に固定されている。また、中間筒部１３内には、乾燥剤４２が収容される。
【００２５】
また、大径筒部１４の開口端には、フィルタ３０と栓体２０を一体に形成したフィルタキャップ４０が嵌合（挿入）されている。フィルタキャップ４０は、例えばナイロンからなる合成樹脂によって形成されており、その上部側にフィルタ本体３１が、その下部側に栓体本体２１が配置されている。
【００２６】
フィルタ本体３１は、受液器本体１１の中間筒部１３の内面と適宜の隙間を有する大きさの筒状に形成されており、その先端部に鍔部３２を形成して先端部がそのまま開口される一方、後部側の底面３３が栓体２０の先端面を兼用している。
【００２７】
また、フィルタ本体３１の周面部には、例えば周方向に渡って四等分する位置に窓３４が形成され、フィルタ本体３１が受液器本体１１の所定位置に取り付けられたとき、受液器本体１１内に流入した熱媒体がフィルタ本体３１の先端開口部から内部に入り込み、かつ窓３４から流出口１８を経てコンデンサ本体１に流出するようになっている。更に、フィルタ本体の窓３４には濾過膜３５が設けられている。この濾過膜３５は、熱媒体中に含まれる不純物を捕捉するためのものであって、例えばナイロンによって網目状に形成されている。
【００２８】
一方、フィルタキャップ４０の栓体本体２１は、先端側をなす円柱部２２と、円柱部２２の下端に軸方向に沿って連設された円筒部２３とが形成されている。更に、円柱部２２の外周部には、Ｏリング２４を装着するためのＯリング用溝２５が形成されている。このＯリング用溝２５は、円柱部２２の外周面においてＯリング２４を嵌合し得る大きさの高さ（幅）及び深さをもって凹んでおり、本例では円柱部２２の外周面に軸方向に沿って２個並設されている。Ｏリング２４は、受液器本体１１内の所定位置にフィルタキャップ４０が挿入されたとき、円柱部２２と受液器本体１１との間で圧縮変形を受けることにより両者２２，１１間をシールするようになっている。
【００２９】
更にまた、受液器本体１１の大径筒部１４に設けられた下側開口部１６の内周面には、係止周溝１７が設けられている。この係止周溝１７には、フィルタキャップ４０を受液器本体１１の所定位置にて所定の押圧力で係止させておく止め輪５０が係脱可能に係止されるようになっている。この止め輪５０は、Ｃ字状に形成されたものであり、その周方向の各端部であってかつ互いに対向する位置に係止孔（図示せず）が形成されている。この止め輪５０を下側開口部１６に係止する（取り付ける）には、例えば各係止孔を互いに近づける方向に治具等で変形されることによって弾性的に縮径し、その縮径した状態のままで受液器本体１１の大径筒部１４の下側開口部１６の端部に形成された平行内周面内に挿入することにより、係止周溝１７に止め輪５０を係止すればよい。
【００３０】
この場合、止め輪５０の上面がフィルタキャップ４０における栓体本体２１の底面２６と当接することにより、フィルタキャップ４０を受液器本体１１内の所定位置に所望の押圧力で係止させておくことができる。そのため、係止周溝１７は、下側開口部１６を形成する平行内周面の端部に止め輪５０を係止し得るよう、環状に凹んで形成されている。
【００３１】
また、栓体２０の円柱部２２には、受液器本体１１に挿入されたフィルタキャップ４０を取り出すための把持部２７が突設されている。この把持部２７は、円柱部２２の下面中央部に円筒部２３側まで垂下して形成された矩形状をなしている。把持部２７は、受液器本体１１からフィルタキャップ４０を取り外すとき、図示しない工具によって把持されると共に、その把持された状態のまま下方に引き抜かれることにより、栓体２０とフィルタ３０とを一体に形成したフィルタキャップ４０が受液器本体１１から取り出せるようになっている。
【００３２】
なお、受液器本体１１に収容される乾燥剤４２は、ポリエステルの繊維によって形成される袋４２の内に図示しないシリカゲル等の吸湿手段を詰めて楕円柱の如き棒状に形成されている。
【００３３】
上記のように構成された受液器１０を組み立てるには、コンデンサ本体１と受液器本体１１とをろう付けにより結合固定した後、まず、受液器本体１１内に乾燥剤４２を挿入し、次いで、その受液器本体１１に対しフィルタ３０及び栓体２０からなるフィルタキャップ４０を、そのフィルタ３０側から挿入する。
【００３４】
フィルタキャップ４０を挿入した後、弾性的に縮径させた止め輪５０を、更に下側開口部１６から平行内周面に挿入し、係止周溝１７の位置にて止め輪５０の縮径変形を解除すると、止め輪５０が弾性復元力を受けるので、係止周溝１７に嵌合すると共に、栓体２０の底面２６に当接する。
【００３５】
これにより、栓体２０及びフィルタ３０からなるフィルタキャップ４０は受液器本体１１に対し所定の圧力で係止された状態を維持することができる。
【００３６】
一方、上記連結部材６０は、図２及び図３に示すように、ヘッダーパイプ２ａの接合面に当接すると共に、受液器本体１１の接合面に当接する板状部材６と、この板状部材６に設けられ、ヘッダーパイプ２ａ及び受液器本体１１に設けられた熱媒体の流出用及び流入用の連通口、すなわち、流出孔９ａ，流出口１８と流入孔９ｂ，流入口１９に嵌合可能な流出用パイプ部材７１（流出用連通部）及び流入用パイプ部材７２（流入用連通部）とで形成されている。
【００３７】
上記板状部材６は、略平坦状の基部６０ａの一側面に、ヘッダーパイプ２ａの接合面に当接する断面円弧状（ヘッダーパイプ２ａの曲率に相似する円弧状）の２つのヘッダーパイプ側接合面６１，６３（以下に、第１，第３の接合面６１，６３という）を設け、基部６０ａの他側面に、受液器本体１１の中間筒部１３の接合面に当接する受液器本体側接合面６２，６４（以下に、第２，第４の接合面６２，６４という）を設けている。この場合、第４の接合面６４には、上記パイプ部材７１，７２を嵌合するための２つの貫通孔６ａ，６ｂが穿設されると共に、２つの貫通孔６ａ，６ｂの間に、上記ヘッダーパイプ２ａ内における仕切板２ｆとの干渉を回避するための長孔状の透孔６５が設けられている。また、第１の接合面６１と第２の接合面６２との間、第２の接合面６２と第３の接合面６３との間、及び第３の接合面６３と第４の接合面６４との間には、それぞれ基部６０ａの両側に設けられた切欠き６６を境にして反対方向に屈曲して設けられている。
【００３８】
なお、この場合、第４の接合面６４に穿設された２つの貫通孔６ａ，６ｂは、受液器本体１１との接合面側が、外方に向かって拡径するテーパ部６ｃが形成されている（図３（ｄ）参照）。
【００３９】
パイプ部材７１，７２のうちの一方のパイプ部材７１は、板状部材６の第４の接合面６４における板状部材６の第３の接合面６３側すなわちヘッダーパイプ２ａの流出孔９ａ及び受液器本体１１の流出口１８に連通する側に穿設された第１の貫通孔６ａ内に嵌合されて流出用パイプ部を形成している。また、他方のパイプ部材７２は、板状部材６の先端側すなわちヘッダーパイプ２ａの流入孔９ｂ及び受液器本体１１の流入口１９に連通する側に穿設された第２の貫通孔６ｂ内に嵌合されて流入用パイプ部を形成している。これらパイプ部材７１，７２は、先端がヘッダーパイプ２ａに設けられた流出孔９ａ又は流入孔９ｂに嵌合可能な円筒状の円筒基部７３と、この円筒基部７３の他方の端部に形成され外径部が外方に向かって拡径すると共に、受液器本体１１に設けられた流出口１８又は流入口１９に当接する拡径開口部７４とによって形成されている。このように形成されるパイプ部材７１，７２は、円筒基部７３を貫通孔６ａ，６ｂ内に嵌挿すると共に、貫通孔６ａ，６ｂに形成されたテーパ部６ｃに拡径開口部７４をかしめて結合することによって板状部材６に固定される。なお、この場合、板状部材６又はパイプ部材７１，７２のうち少なくとも一方を、ろう材が被着されたクラッド材にて形成する方が好ましい。
【００４０】
次に、受液器付き熱交換器の組立手順について説明する。まず、所定寸法に打ち抜かれた板状素材をプレス加工にて、上記第１ないし第４の接合面６１〜６４と、２つの貫通孔６ａ，６ｂ、及び、透孔６５を具備する連結部材６０を成形する。
【００４１】
次に、別途に製造された流入用及び流出用パイプ部材７１，７２を上記板状部材６の貫通孔６ａ，６ｂにそれぞれ嵌挿すると共に、貫通孔６ａ，６ｂのテーパ部６ｃに流入用及び流出用パイプ部材７１，７２の拡径開口部７４をかしめて結合する。
【００４２】
この状態で、上記連結部材６０の第２及び第４の接合面６２，６４を、受液器本体１１の中間筒部１３の外側面に当接すると共に、流入用及び流出用パイプ部材７１，７２の拡径開口部７４がそれぞれ受液器本体１１の流出口１８及び流入口１９に連通するように圧接して、受液器本体１１と第２，第４の接合面６２，６４の側辺部をスポット溶接Ｗによって仮溶接する。
【００４３】
次に、第１及び第３の接合面６１，６３を、ヘッダーパイプ２ａの中央部より下方側つまり過熱域１Ａより下方側の側面（接合面）に当接すると共に、流出用及び流入用パイプ部材７１，７２を流出孔９ａ及び流入孔９ｂに嵌合し、かつ、ヘッダーパイプ２ａと第１，第３の接合面６１，６３の側辺部とをスポット溶接Ｗによって仮溶接する。この状態において、ヘッダーパイプ２ａの過熱域１Ａと受液器本体１１の小径筒部１２との間に隙間Ｓが形成される。これにより、ヘッダーパイプ２ａの高温部熱量が受液器１０側に伝熱するのを抑制することができる。
【００４４】
次に、ヘッダーパイプ２ａに熱交換フィン４、熱交換管３と他方のヘッダーパイプ２ｂを組み付けて治具（図示せず）にて固定して、仮組みする。
【００４５】
上記のようにして仮組みされたコンデンサ本体１、受液器本体１１及び連結部材６０にフラックスを塗布した後、これらコンデンサ本体１、受液器本体１１及び連結部材６０を図示しない炉内に収容し、所定温度例えば６００℃の温度で加熱して、コンデンサ本体１、受液器本体１１及び連結部材６０を一体ろう付けする。
【００４６】
コンデンサ本体１に一体ろう付けされた受液器本体１１内に、上記乾燥剤４２を挿入した後、上述したように、フィルタ３０及び栓体２０を有するフィルタキャップ４０を挿入（嵌合）して、受液器付き熱交換器の組立てが終了する。
【００４７】
なお、上記説明では、連結部材６０の第２及び第４の接合面６２，６４を受液器本体１１の接合面に当接すると共に、スポット溶接Ｗによって仮溶接した後、第１及び第３の接合面６１，６３にヘッダーパイプ２ａの接合面を当接すると共に、パイプ部材７１，７２の先端を流出孔９ａ及び流入孔９ｂに嵌合し、かつ、スポット溶接Ｗによって仮溶接する場合について説明したが、これら仮溶接とパイプ部材７１，７２の流出孔９ａ及び流入孔９ｂへの嵌合を同時に行ってもよい。
【００４８】
また、上記説明では、パイプ部材７１，７２を、ヘッダーパイプ２ａに設けられた流出孔９ａと流入孔９ｂに嵌合する場合について説明したが、パイプ部材７１，７２を、受液器本体１１に設けられた流出口１８と流入口１９に嵌合させるようにしてもよい。つまり、ヘッダーパイプ２ａの流出孔９ａ及び流入孔９ｂに、パイプ部材７１，７２が連通するように、ヘッダーパイプ２ａに第４の接合面６４を当接し、パイプ部材７１，７２の先端を受液器本体１１の流出口１８及び流入口１９に嵌合すると共に、第１の接合面６１を受液器本体１１の接合面に当接し、そして、両当接部をそれぞれ仮溶接すればよい。
【００４９】
また、上記説明では、流入用連通部及び流出用連通部を、板状部材６（基部６０ａ）に穿設された貫通孔６ａ，６ｂに嵌合するパイプ部材７１，７２にて形成する場合について説明したが、必ずしもこのような構造に限定されるものではない。例えば、パイプ部材７１，７２に代えて板状部材６（基部６０ａ）をバーリング加工することによって流出用連通部、流入用連通部を形成してもよい。すなわち、図４に示すように、連結部材６０Ａの板状部材６（基部６０ａ）をバーリング加工して流出用連通部７１Ａ及び流出用連通部７２Ａを形成してもよい。なお、図４において、その他の部分は、図３に示す実施形態と同じであるので、同一部分には同一符号を付して、説明は省略する。
【００５０】
上記のように構成される受液器付き熱交換器によれば、受液器本体１１は、プレス加工によって円筒状部材１１Ａの一端から他端に向かって、小径筒部１２、該小径筒部１２より大径の中間筒部１３及び該中間筒部１３より大径の大径筒部１４を有する段付円筒状に形成されるので、円筒部と足部とを有する押出形材から足部及び円筒内面の不要部分を切削する従来の構造に比べて材料の削減が図れると共に、重量の軽量化が図れ、かつ、受液器本体１１の作製作業の簡略化が図れる。また、受液器本体１１の径やフィルタキャップ４０の径等が変更された場合においても、同一の円筒状部材１１Ａに対してプレス成形型ＰＡ，ＰＢの径を変えるのみで対応することも可能である。
【００５１】
また、受液器本体１１における中間筒部１３とヘッダーパイプ２ａとの間に連結部材６０を介在させて、受液器本体１１とヘッダーパイプ２ａとをろう付けにより結合固定することにより、ヘッダーパイプ２ａと受液器本体１１の小径筒部１２との間の隙間Ｓを広く取ることができるので、コンデンサ本体１の高温部分から受ける受液器１０の熱的影響を低減することができる。
【００５２】
また、連結部材６０は、略平坦状の基部６０ａの一側面に、ヘッダーパイプ２ａの接合面に当接する第１，第３の接合面６１，６３（ヘッダーパイプ側接合面）を設け、他側面に、受液器本体１１の中間筒部１３の接合面に当接する第２，第４の接合面６２，６４（受液器本体側接合面）を設けた板状部材６と、ヘッダーパイプ２ａ及び受液器本体１１に設けられた熱媒体の流出用及び流入用の連通口すなわち、流出孔９ａ，流出口１８と流入孔９ｂ，流入口１９に嵌合可能な連通部（パイプ部材７１，７２）とを具備することにより、連結部材６０とコンデンサ本体１及び受液器本体１１との接合部の面積を直線状に広く取ることができるので、ろう付けを確実かつ強固にすることができる。
【００５３】
なお、上記実施形態では、ヘッダーパイプ側接合面（第１及び第３の接合面６１，６３）と受液器本体側接合面（第２及び第４の接合面６２，６４）が２つ設けられる場合について説明したが、ヘッダーパイプ側接合面と受液器本体側接合面の数は任意に設定可能である。また、受液器１０の小径筒部１２、大径筒部１４についても２つ以上の径を有する段付形状としてもよい。
【００５４】
【発明の効果】
以上に説明したように、この発明によれば、上記のように構成されているので、以下のような優れた効果が得られる。
【００５５】
（１）請求項１記載の発明によれば、受液器本体は、プレス加工によって円筒状部材の一端から他端に向かって、小径筒部、該小径筒部より大径の中間筒部及び該中間筒部より大径の大径筒部を有する段付円筒状に形成するので、円筒部と足部とを有する押出形材から足部及び円筒内面の不要部分を切削する構造に比べて材料の削減が図れると共に、重量の軽量化が図れ、かつ、受液器本体の作製作業の簡略化が図れる。しかも、受液器本体の径が変更された場合においても、プレス加工での拡径を変えるのみで対応が可能となる。
【００５６】
また、受液器本体における中間筒部とヘッダーパイプとの間にアルミニウム製の連結部材を介在させて、受液器本体とヘッダーパイプとをろう付けにより結合固定することにより、ヘッダーパイプと受液器本体の小径筒部との間の隙間を広く取ることができるので、熱交換器本体の高温部分から受ける受液器の熱的影響を低減することができると共に、熱交換効率の向上を図ることができる。
【００５７】
（２）請求項２記載の発明によれば、連結部材は、略平坦状の基部の一側面に、ヘッダーパイプの接合面に当接するヘッダーパイプ側接合面を設け、他側面に、受液器本体の中間筒部の接合面に当接する受液器本体側接合面を設けた板状部材と、ヘッダーパイプ及び受液器本体に設けられた熱媒体の流出用及び流入用の連通口に嵌合可能な連通部とを具備することにより、連結部材と熱交換器本体及び受液器本体との接合部の面積を直線状に広く取ることができるので、ろう付けを確実かつ強固にすることができる。
【図面の簡単な説明】
【図１】この発明に係る受液器付き熱交換器の一例を示す正面図（ａ）及び要部拡大平面図（ｂ）である。
【図２】この発明におけるヘッダーパイプと受液器とのろう付け部を示す要部断面図である。
【図３】この発明における連結部材の一例の平面図（ａ）、（ａ）のＩ−Ｉ線に沿う断面図（ｂ）、拡大側面図（ｃ）及び（ｂ）の要部拡大断面図（ｄ）である。
【図４】この発明における別の連結部材の平面図（ａ）、（ａ）のＩＩ−ＩＩ線に沿う断面図（ｂ）、拡大側面図（ｃ）及び（ｂ）の要部拡大断面図（ｄ）である。
【図５】この発明における受液器本体の成形工程を示す概略断面図である。
【符号の説明】
１コンデンサ本体（熱交換器本体）
２ａ，２ｂヘッダーパイプ
２ｃ熱媒体の流入口
２ｄ熱媒体の流出口
３熱交換管
４フィン
６板状部材
６ａ，６ｂ貫通孔
９ａ流出孔（流出用連通口）
９ｂ流入孔（流入用連通口）
１０受液器
１１受液器本体
１１Ａ円筒状部材
１２小径筒部
１３中間筒部
１４大径筒部
１８流出口（流出用連通口）
１９流入口（流入用連通口）
６０，６０Ａ連結部材
６０ａ平坦状基部
６１第１の接合面（ヘッダーパイプ側接合面）
６２第２の接合面（受液器本体側接合面）
６３第３の接合面（ヘッダーパイプ側接合面）
６４第４の接合面（受液器本体側接合面）
７１，７２パイプ部材（連通部）
７１Ａ流入用連通部
７２Ａ流出用連通部[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger with a liquid receiver, and more particularly to a heat exchanger with a liquid receiver made of aluminum incorporated in an air conditioner installed in an automobile, for example. Here, aluminum means including aluminum or an aluminum alloy.
[0002]
[Prior art]
Conventionally, this type of heat exchanger includes a pair of substantially cylindrical header pipes each made of aluminum, a plurality of parallel heat exchange pipes installed between the header pipes, and a pipe between adjacent heat exchange pipes. There is generally known a structure in which a heat exchanger body having fins interposed therein and a substantially cylindrical liquid receiver body made of aluminum are joined and fixed by brazing.
[0003]
Conventionally, after extruding an aluminum extruded profile having a cross-sectional shape having a cylindrical portion and a foot portion (joining portion) having a shape in contact with a header pipe into a required length, the receiving portion is formed into a required length. What has been cut and formed while leaving the necessary joint with the header pipe is used. The cut part of the foot part of the liquid receiver main body formed in this way is fitted (inserted) with the part in contact with the high temperature part (the area where the high temperature heat medium flows in) of the header pipe, the filter and the seal cap. (See, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP-A-2002-195701 (paragraph numbers 0037 to 0042, FIGS. 1 and 5)
As described above, the reason for cutting the feet of the liquid receiver main body is that, first, the portion of the header pipe that is in contact with the high temperature part is such that the heat of the high temperature part of the heat exchanger main body is transmitted to the liquid receiver, This is because it is necessary to delete this part in order to re-vaporize the heat medium (refrigerant) that has been liquefied by the cooling and lower the cooling efficiency. Secondly, in order to improve the sealing performance, the filter and seal cap are inserted into a smaller area, and the inner diameter of the cylindrical portion is uniformly increased by finely adjusting the inner diameter and the surface roughness. That's why.
[0005]
[Problems to be solved by the invention]
By the way, in what cuts an unnecessary part of a foot from an aluminum extruded profile having a cylindrical part and a foot, when extruding with a cross-sectional shape having a cylindrical part and a foot, the foot of the cylindrical part, The thickness of the cylindrical portion is extra because the thickness of the corresponding portion is uneven and the balance cannot be obtained. For this reason, it is necessary to cut and adjust the thickness of the insertion portion of the filter and the seal packing. In addition, since the weight of the cylindrical portion is unnecessarily heavy with respect to the weight of the entire liquid receiver, it is necessary to reduce the thickness of the entire cylindrical portion depending on the type of the product.
[0006]
Therefore, in the conventional liquid receiver main body, it is necessary to cut the cylindrical portion and the foot from both sides of the weight reduction and the attachment of the seal cap, so that the cutting operation is troublesome. In addition, when weight reduction is emphasized, there is a possibility that the brazing area becomes small and the bonding strength becomes insufficient. In addition, when the diameter of the liquid receiver main body is changed, there is a problem that a new extruded member must be formed.
[0007]
The present invention has been made in view of the above circumstances, and it is possible to reduce the material and reduce the weight, to facilitate the manufacturing operation, and to reduce the thermal effect that the liquid receiver receives from the heat exchanger body. It is an object of the present invention to provide a heat exchanger with a liquid receiver that can securely and firmly perform brazing between the heat exchanger body and the liquid receiver.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 comprises a plurality of heat exchange tubes laid in parallel with each other between a pair of aluminum header pipes. In a heat exchanger with a receiver, in which a heat exchanger body having an outlet and a substantially cylindrical aluminum receiver body are fixedly connected by brazing, the receiver body is formed by pressing. From one end to the other end of the cylindrical member, a small-diameter cylindrical portion, an intermediate cylindrical portion having a larger diameter than the small-diameter cylindrical portion and a large-diameter cylindrical portion having a larger diameter than the intermediate cylindrical portion are formed in a stepped cylindrical shape, An aluminum connecting member is interposed between the intermediate tubular portion and the header pipe in the liquid receiver main body, and the liquid receiver main body and the header pipe are fixedly connected by brazing, I do.
[0009]
According to a second aspect of the present invention, in the heat exchanger with a liquid receiver according to the first aspect, the connecting member has a header pipe-side joining surface that abuts a joining surface of the header pipe on one side surface of the substantially flat base. A plate-shaped member having, on the other side thereof, a joining surface of the receiver main body which is in contact with the joining surface of the intermediate cylindrical portion of the receiver main body; and a heat medium provided on the header pipe and the receiver main body. And a communication portion that can be fitted to the outflow and inflow communication ports.
[0010]
According to the first aspect of the present invention, the liquid receiver main body is formed by pressing, from one end of the cylindrical member to the other end, a small-diameter cylindrical portion, an intermediate cylindrical portion having a diameter larger than the small-diameter cylindrical portion, and the intermediate cylindrical portion. By forming it into a stepped cylindrical shape having a large-diameter cylindrical part with a larger diameter than the part, compared to a structure in which unnecessary parts of the foot and the inner surface of the cylinder are cut from the extruded shape having the cylindrical part and the foot. The reduction can be achieved, the weight can be reduced, and the operation of manufacturing the liquid receiver main body can be simplified. Moreover, even when the diameter of the liquid receiver main body is changed, it is possible to cope only by changing the diameter by press working.
[0011]
In addition, an aluminum connecting member is interposed between the intermediate cylindrical portion and the header pipe in the receiver main body, and the receiver main body and the header pipe are joined and fixed by brazing, so that the header pipe and the receiver pipe are received. Since the gap between the small-diameter cylindrical portion of the container main body can be widened, the thermal influence of the liquid receiver received from the high-temperature portion of the heat exchanger main body can be reduced, and the heat exchange efficiency is improved. be able to.
[0012]
According to the second aspect of the present invention, the connecting member is provided on one side surface of the substantially flat base portion with the header pipe-side joining surface abutting on the joining surface of the header pipe, and on the other side surface, the intermediate portion of the liquid receiver main body. A plate-like member provided with a receiver body side joining surface that abuts on a joining surface of a cylindrical portion, and a communication port for outflow and inflow of a heat medium provided in a header pipe and a receiver body provided in a header pipe. By providing the communicating portion, the area of the joint between the connecting member and the heat exchanger main body and the liquid receiver main body can be increased linearly, so that brazing can be reliably and firmly performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a heat exchanger with a liquid receiver according to the present invention will be described in detail with reference to the drawings.
[0014]
FIG. 1 is a front view (a) showing an example of a heat exchanger with a liquid receiver according to the present invention, and FIG. 2 (b) is a plan view showing a main part of (a), and FIG. 2 is a main part of the heat exchanger. FIG. 3 is an enlarged sectional view, FIG. 3 is a plan view showing a connecting member according to the present invention, and FIG. 3B is a sectional view taken along line II of FIG. It is an expanded sectional view (d).
[0015]
As shown in FIG. 1, a condenser (condenser) serving as the heat exchanger includes a pair of header pipes 2a and 2b, each made of aluminum, and a plurality of heat exchangers bridged between these header pipes 2a and 2b. A heat exchanger main body 1 (hereinafter, referred to as a condenser main body 1) including a pipe 3 and heat exchange fins such as corrugated fins 4 interposed between the heat exchange pipes 3 and integrally joined; And a liquid receiver 10 including a liquid receiver main body 11 made of aluminum. In this case, the condenser main body 1 and the liquid receiver main body 11 are integrally brazed via a connecting member 60 made of aluminum.
[0016]
The header pipes 2a and 2b are formed in a substantially cylindrical shape by, for example, an extruded shape member made of aluminum, and a cap member 5 made of aluminum is fixed to the upper and lower ends by brazing. In addition, for example, near the upper end on the outer side of one header pipe 2a (the left side in FIG. 1), an inlet 2c for a high-temperature heat medium is provided, and the other header pipe 2b (the right side in FIG. 1) is provided. A heat medium outlet 2d is provided near the lower end of the side. Further, on the side surface of the header pipe 2a, as shown in FIG. 2, an outflow hole 9a and an inflow hole 9b forming a communication port for outflow and inflow of the heat medium for communicating with the liquid receiver 10 are provided. The liquid receiver 10 is integrally brazed to the header pipe 2a via the connecting member 60 so as to communicate with the outflow hole 9a and the inflow hole 9b.
[0017]
A partition plate 2e is provided at about one-third of the upper side of the header pipe 2a, and a partition plate 2f is provided between the outflow hole 9a and the inflow hole 9b. A partition plate 2g is provided at a position corresponding to the lower partition plate 2f in the header pipe 2b.
[0018]
Thus, by disposing the partition plates 2e, 2f, 2g in the header pipes 2a, 2b, the high-temperature and high-pressure heat medium flowing into the header pipe 2a from the inflow hole 2c is superheated above the partition plate 2e. It flows through the heat exchange tube 3 (high temperature region) and flows into the header pipe 2b. At this time, heat exchange is performed in a gaseous state, and the temperature of the heat medium drops. The heat medium flowing into the header pipe 2b flows through the heat exchange pipe 3 in the condensation area 1B (gas-liquid two-phase area) between the partition plates 2e and 2f and 2g, and flows again into the header pipe 2a. At this time, heat exchange of latent heat is performed, and the state changes from a 100% gas state to a 100% liquid state. In this region, there is no temperature change accompanying the phase change. The heat medium in the liquid state flowing into the header pipe 2a flows into the receiver main body 11 through the outlet hole 9a, and after being separated into gas and liquid by the receiver 10, the heat medium in the liquid state flows through the inlet hole 9b. The air flows through the heat exchange pipe 3 in the subcooling area 1C (sub-cool area) below the partition plates 2f and 2g, and flows into the header pipe 2b. At this time, heat exchange is performed in the heat medium in a liquid state, and the temperature drops.
[0019]
Further, as shown in FIG. 1 (a), the heat exchange tube 3 is formed of, for example, a flat plate made of an extruded shape member made of aluminum, and has a plurality of heat exchanger tubes 3 penetrating in the longitudinal direction. A flow path (not shown) of the divided heat medium is formed. Both ends of the heat exchange tube 3 formed as described above are inserted and fixed to a plurality of slits (not shown) arranged parallel to each other at appropriate intervals on opposite sides of the side surfaces of the header pipes 2a and 2b. Have been.
[0020]
The heat exchange fins, ie, the corrugated fins 4, are formed in a continuous wave shape by bending an aluminum plate as shown in FIG. 1A, and are interposed between the heat exchange tubes 3. It is brazed. In this case, the corrugated fins 4 are also brazed to the outer sides of the heat exchange tubes 3 arranged at the uppermost stage and the lowermost stage, and both corrugated fins 4 are protected in order to protect these corrugated fins 4. Further, a side plate 4a is brazed to the outer side.
[0021]
As shown in FIG. 2, the liquid receiver 10 includes, for example, a liquid receiver main body 11 formed by pressing a cylindrical member formed of an aluminum extruded member into a multi-stage shape by press working described later. are doing. In order to form the liquid receiver main body 11, as shown in FIG. 5, first, a cylindrical extruded member made of aluminum is cut into appropriate lengths to prepare a cylindrical member 11A (FIG. 5 (a)). )reference). Next, the cylindrical member 11A is set in a pressing device (not shown), and a cylindrical molding die PA having a diameter larger than the inner diameter of the cylindrical portion (small-diameter cylindrical portion) 12 at one end toward one end of the cylindrical member 11A. To expand the diameter of the cylindrical member 11A to form an intermediate cylindrical portion 13 connected to the small-diameter cylindrical portion 12 at the end (one end) (see FIG. 5B). After the intermediate cylindrical portion 13 is formed, a cylindrical molding die PB having a diameter larger than the inner diameter of the intermediate cylindrical portion 13 is inserted from the other end to further expand the cylindrical member 11A, and a large diameter connected to the intermediate cylindrical portion 13 is formed. The cylindrical portion 14 is formed (see FIG. 5C). As a result, the liquid receiver main body 11 is formed in a multi-stage cylindrical shape having a small-diameter cylindrical portion 12, an intermediate cylindrical portion 13, and a large-diameter cylindrical portion 14 whose diameter gradually increases from one end to the other end.
[0022]
By molding the liquid receiver main body 11 as described above, unnecessary portions of the foot and the inner surface of the cylinder are removed from the extruded aluminum material having the cylindrical portion and the foot, and the enlarged diameter portion is formed at one end. The material can be reduced, the weight can be reduced, the manufacturing operation can be simplified, and the mass production can be achieved as compared with the case of the conventional method. In addition, even when the diameter of the liquid receiver main body 11 is changed, it is possible to cope with the same cylindrical member 11A only by changing the diameter of the press forming dies PA and PB.
[0023]
As shown in FIG. 2, the liquid receiver main body 11 has an outlet 18 communicating with the outlet 9a of the header pipe 2a at a position above the partition plate 2f in the header pipe 2a. . An inflow port 19 is formed in the header pipe 2a at a position below the partition plate 2f so as to coincide with the inflow hole 9b of the header pipe 2a.
[0024]
A cap 15 is closed at the open end of the small-diameter cylindrical portion 12 at one end (upper end) of the liquid receiver main body 11 formed as described above. The cap 15 is formed of an aluminum member, and is fixed to the receiver main body 11 by, for example, brazing. In addition, a desiccant 42 is stored in the intermediate cylindrical portion 13.
[0025]
A filter cap 40 in which the filter 30 and the plug 20 are integrally formed is fitted (inserted) into the open end of the large-diameter cylindrical portion 14. The filter cap 40 is formed of, for example, a synthetic resin made of nylon. The filter main body 31 is arranged on the upper side, and the plug body 21 is arranged on the lower side.
[0026]
The filter main body 31 is formed in a cylindrical shape having a suitable gap with the inner surface of the intermediate cylindrical portion 13 of the liquid receiver main body 11, and a flange 32 is formed at a distal end thereof, and the distal end is opened as it is. On the other hand, the bottom surface 33 on the rear side also serves as the distal end surface of the plug 20.
[0027]
Further, a window 34 is formed in a peripheral surface portion of the filter main body 31 at, for example, a position where the filter main body 31 is divided into four in the circumferential direction, and when the filter main body 31 is attached to a predetermined position of the liquid receiver main body 11, The heat medium that has flowed into the main body 11 enters the filter main body 31 through the opening at the distal end of the filter main body 31, and flows out of the window 34 to the condenser main body 1 through the outlet 18. Further, a filter membrane 35 is provided in the window 34 of the filter body. The filtration membrane 35 is for trapping impurities contained in the heat medium, and is formed in a mesh shape by, for example, nylon.
[0028]
On the other hand, the plug body 21 of the filter cap 40 is formed with a cylindrical portion 22 on the distal end side, and a cylindrical portion 23 continuously provided along the axial direction at the lower end of the cylindrical portion 22. Further, an O-ring groove 25 for mounting the O-ring 24 is formed in the outer peripheral portion of the cylindrical portion 22. The O-ring groove 25 is recessed on the outer peripheral surface of the cylindrical portion 22 with a height (width) and depth large enough to fit the O-ring 24. Two are arranged in parallel along the direction. When the filter cap 40 is inserted into a predetermined position in the receiver main body 11, the O-ring 24 undergoes compressive deformation between the cylindrical portion 22 and the receiver main body 11, thereby sealing between the two 22 and 11. It is supposed to.
[0029]
Furthermore, a locking peripheral groove 17 is provided on the inner peripheral surface of the lower opening 16 provided in the large-diameter cylindrical portion 14 of the liquid receiver main body 11. A retaining ring 50 for retaining the filter cap 40 at a predetermined position of the receiver main body 11 with a predetermined pressing force is removably locked to the locking peripheral groove 17. . The retaining ring 50 is formed in a C-shape, and a locking hole (not shown) is formed at each end in the circumferential direction and at a position facing each other. In order to lock (attach) the retaining ring 50 to the lower opening 16, for example, the locking holes are elastically reduced by being deformed by a jig or the like in a direction in which the locking holes are brought closer to each other, and the diameter is reduced. The retaining ring 50 is engaged with the locking circumferential groove 17 by inserting the retaining ring 50 into the parallel inner peripheral surface formed at the end of the lower opening 16 of the large-diameter cylindrical portion 14 of the receiver main body 11 in the state. You just need to stop.
[0030]
In this case, the upper surface of the retaining ring 50 abuts on the bottom surface 26 of the plug body 21 in the filter cap 40, thereby locking the filter cap 40 at a predetermined position in the receiver main body 11 with a desired pressing force. be able to. Therefore, the locking peripheral groove 17 is formed to be annularly concave so that the retaining ring 50 can be locked at the end of the parallel inner peripheral surface forming the lower opening 16.
[0031]
Further, a grip portion 27 for taking out the filter cap 40 inserted into the liquid receiver main body 11 is protruded from the cylindrical portion 22 of the stopper 20. The grip portion 27 has a rectangular shape formed by hanging down to the cylindrical portion 23 at the center of the lower surface of the cylindrical portion 22. When the filter cap 40 is removed from the receiver main body 11, the grip portion 27 is gripped by a tool (not shown), and is pulled out downward while holding the grip, so that the plug 20 and the filter 30 are integrated. The filter cap 40 formed in the liquid receiver main body 11 can be taken out from the receiver main body 11.
[0032]
Note that the desiccant 42 contained in the liquid receiver main body 11 is formed in a bar shape such as an elliptical column by packing a moisture absorbing means such as silica gel (not shown) in a bag 42 formed of polyester fiber.
[0033]
In order to assemble the liquid receiver 10 configured as described above, the condenser body 1 and the liquid receiver body 11 are connected and fixed by brazing, and first, the desiccant 42 is inserted into the liquid receiver body 11. Then, the filter cap 40 including the filter 30 and the plug 20 is inserted into the receiver main body 11 from the filter 30 side.
[0034]
After the filter cap 40 is inserted, the retaining ring 50 whose diameter has been reduced elastically is further inserted into the parallel inner peripheral surface from the lower opening 16, and the diameter of the retaining ring 50 is reduced at the position of the locking peripheral groove 17. When the deformation is released, the retaining ring 50 receives the elastic restoring force, so that the retaining ring 50 fits into the locking peripheral groove 17 and abuts against the bottom surface 26 of the plug 20.
[0035]
Thereby, the filter cap 40 including the plug 20 and the filter 30 can be maintained in a state of being locked to the liquid receiver main body 11 at a predetermined pressure.
[0036]
On the other hand, as shown in FIGS. 2 and 3, the connecting member 60 comes into contact with the joining surface of the header pipe 2 a and the plate-like member 6 which comes into contact with the joining surface of the receiver main body 11. 6, which are provided in the header pipe 2 a and the receiver main body 11, and are connected to the communication ports for outflow and inflow of the heat medium, ie, the outflow holes 9 a, the outflow ports 18 and the inflow holes 9 b, and the inflow ports 19. It is formed of a possible outflow pipe member 71 (outflow communication portion) and an inflow pipe member 72 (inflow communication portion).
[0037]
The plate-shaped member 6 has two header pipe-side joint surfaces having an arc-shaped cross section (an arc shape similar to the curvature of the header pipe 2a) that abuts the joint surface of the header pipe 2a on one side surface of the substantially flat base 60a. 61, 63 (hereinafter, referred to as first and third joint surfaces 61, 63), and a receiver body contacting the joint surface of the intermediate cylindrical portion 13 of the receiver body 11 on the other side surface of the base 60a. Side joint surfaces 62 and 64 (hereinafter, referred to as second and fourth joint surfaces 62 and 64) are provided. In this case, two through holes 6a and 6b for fitting the pipe members 71 and 72 are formed in the fourth joint surface 64, and the fourth through hole 6a and 6b are provided between the two through holes 6a and 6b. An elongated through-hole 65 is provided to avoid interference with the partition plate 2f in the header pipe 2a. Also, between the first joint surface 61 and the second joint surface 62, between the second joint surface 62 and the third joint surface 63, and between the third joint surface 63 and the fourth joint surface 64 Are bent in opposite directions with notches 66 provided on both sides of the base portion 60a as boundaries.
[0038]
In this case, the two through holes 6a and 6b formed in the fourth joint surface 64 are formed with a tapered portion 6c whose diameter increases outward on the joint surface side with the liquid receiver main body 11. (See FIG. 3D).
[0039]
One of the pipe members 71, 72 is connected to the fourth joint surface 64 of the plate member 6 on the third joint surface 63 side of the plate member 6, that is, the outflow hole 9 a of the header pipe 2 a and the liquid receiving member 9. The outlet pipe portion is formed by fitting into a first through hole 6a formed on the side of the vessel main body 11 communicating with the outlet 18. Further, the other pipe member 72 is formed in a second through hole 6b formed on the distal end side of the plate member 6, that is, on the side communicating with the inflow hole 9b of the header pipe 2a and the inflow port 19 of the receiver main body 11. To form an inflow pipe portion. These pipe members 71, 72 are formed at the other end of the cylindrical base 73 with a cylindrical shape capable of fitting into the outflow hole 9a or the inflow hole 9b provided at the header pipe 2a. The diameter of the diameter portion is increased outward, and the diameter portion is formed by a diameter-expanding opening 74 abutting on the outflow port 18 or the inflow port 19 provided in the liquid receiver main body 11. In the pipe members 71 and 72 formed in this manner, the cylindrical base portion 73 is inserted into the through holes 6a and 6b, and the diameter increasing opening 74 is caulked in the tapered portions 6c formed in the through holes 6a and 6b. By being combined, it is fixed to the plate-shaped member 6. In this case, it is preferable that at least one of the plate-like member 6 and the pipe members 71 and 72 is formed of a clad material on which a brazing material is adhered.
[0040]
Next, the procedure for assembling the heat exchanger with a liquid receiver will be described. First, a connection member 60 having the first to fourth bonding surfaces 61 to 64, two through holes 6a, 6b, and a through hole 65 is formed by pressing a plate material punched to a predetermined size. Is molded.
[0041]
Next, separately manufactured inflow and outflow pipe members 71 and 72 are inserted into the through-holes 6a and 6b of the plate-shaped member 6, respectively, and the inflow and outflow pipe members 71 and 72 are inserted into the tapered portions 6c of the through-holes 6a and 6b. The enlarged diameter openings 74 of the outflow pipe members 71 and 72 are caulked and connected.
[0042]
In this state, the second and fourth joint surfaces 62 and 64 of the connecting member 60 are brought into contact with the outer surface of the intermediate cylindrical portion 13 of the liquid receiver main body 11, and the inflow and outflow pipe members 71 and 72. Of the liquid receiver main body 11 and the side surfaces of the second and fourth joint surfaces 62, 64 so as to communicate with the outlet 18 and the inlet 19 of the receiver main body 11, respectively. The part is temporarily welded by spot welding W.
[0043]
Next, the first and third joint surfaces 61 and 63 are brought into contact with the lower side of the center portion of the header pipe 2a, that is, the side surface (joint surface) below the superheated region 1A, and the outflow and inflow pipe members. 71, 72 are fitted into the outflow hole 9a and the inflow hole 9b, and the header pipe 2a and the side portions of the first and third joint surfaces 61, 63 are temporarily welded by spot welding W. In this state, a gap S is formed between the superheated region 1A of the header pipe 2a and the small-diameter cylindrical portion 12 of the receiver main body 11. Accordingly, it is possible to suppress the heat amount of the high temperature portion of the header pipe 2a from being transferred to the liquid receiver 10.
[0044]
Next, the heat exchange fins 4, the heat exchange tube 3, and the other header pipe 2b are assembled to the header pipe 2a, fixed with a jig (not shown), and temporarily assembled.
[0045]
After flux is applied to the capacitor body 1, the receiver body 11, and the connecting member 60 temporarily assembled as described above, the capacitor body 1, the receiver body 11, and the connecting member 60 are housed in a furnace (not shown). Then, the capacitor main body 1, the liquid receiver main body 11, and the connecting member 60 are integrally brazed by heating at a predetermined temperature, for example, a temperature of 600 ° C.
[0046]
After the desiccant 42 is inserted into the liquid receiver main body 11 integrally brazed to the capacitor main body 1, the filter cap 40 having the filter 30 and the plug 20 is inserted (fitted) as described above. Then, the assembly of the heat exchanger with a liquid receiver is completed.
[0047]
In the above description, the second and fourth joint surfaces 62 and 64 of the connecting member 60 are brought into contact with the joint surface of the liquid receiver main body 11, and the first and third joints are temporarily welded by spot welding W. The case where the joining surfaces of the header pipe 2a are brought into contact with the joining surfaces 61 and 63, the tips of the pipe members 71 and 72 are fitted into the outflow holes 9a and the inflow holes 9b, and the temporary welding by spot welding W has been described. However, these temporary welding and fitting of the pipe members 71 and 72 into the outflow hole 9a and the inflow hole 9b may be performed simultaneously.
[0048]
In the above description, the case where the pipe members 71 and 72 are fitted to the outflow hole 9a and the inflow hole 9b provided in the header pipe 2a has been described. The outlet 18 and the inlet 19 may be fitted. That is, the fourth joint surface 64 is brought into contact with the header pipe 2a so that the pipe members 71 and 72 communicate with the outflow hole 9a and the inflow hole 9b of the header pipe 2a, and the tips of the pipe members 71 and 72 are received. What is necessary is just to fit into the outflow port 18 and the inflow port 19 of the receiver main body 11, to make the 1st joining surface 61 abut on the joining surface of the receiver main body 11, and to temporarily weld both contact parts, respectively.
[0049]
In the above description, the case where the inflow communication portion and the outflow communication portion are formed by the pipe members 71 and 72 fitted into the through holes 6a and 6b formed in the plate-like member 6 (the base 60a). Although described, the structure is not necessarily limited to such a structure. For example, instead of the pipe members 71 and 72, the outflow communication portion and the inflow communication portion may be formed by burring the plate-shaped member 6 (base portion 60a). That is, as shown in FIG. 4, the outflow communication portion 71A and the outflow communication portion 72A may be formed by burring the plate-shaped member 6 (base portion 60a) of the connection member 60A. In FIG. 4, the other parts are the same as those in the embodiment shown in FIG. 3.
[0050]
According to the heat exchanger with a liquid receiver configured as described above, the liquid receiver main body 11 is formed by pressing the small-diameter cylindrical portion 12 from one end to the other end of the cylindrical member 11A. Since it is formed in a stepped cylindrical shape having an intermediate cylindrical portion 13 having a diameter larger than 12 and a large-diameter cylindrical portion 14 having a diameter larger than the intermediate cylindrical portion 13, an extruded shape having a cylindrical portion and a foot portion is used. As compared with the conventional structure in which an unnecessary portion of the inner surface of the cylinder is cut, the material can be reduced, the weight can be reduced, and the manufacturing operation of the liquid receiver main body 11 can be simplified. Further, even when the diameter of the liquid receiver main body 11, the diameter of the filter cap 40, and the like are changed, it is possible to cope with the same cylindrical member 11A only by changing the diameter of the press molds PA and PB. It is.
[0051]
Further, the connecting member 60 is interposed between the intermediate tubular portion 13 and the header pipe 2a in the liquid receiver main body 11, and the liquid receiver main body 11 and the header pipe 2a are joined and fixed by brazing, so that the header pipe is formed. Since the gap S between 2a and the small-diameter cylindrical portion 12 of the liquid receiver main body 11 can be made wider, the thermal influence of the liquid receiver 10 received from the high temperature portion of the condenser main body 1 can be reduced.
[0052]
Further, the connecting member 60 is provided with first and third joint surfaces 61 and 63 (header pipe side joint surfaces) which are in contact with the joint surface of the header pipe 2a on one side surface of the substantially flat base 60a, and the other side surface. A plate-shaped member 6 provided with second and fourth joint surfaces 62 and 64 (joint surfaces on the receiver body side) which are in contact with the joint surface of the intermediate cylindrical portion 13 of the receiver body 11, and a header pipe 2a. And a communication port provided in the receiver main body 11 for outflow and inflow of the heat medium, that is, a communication portion (a pipe member 71, a pipe member 71, 72), the area of the joint between the connecting member 60 and the capacitor main body 1 and the liquid receiver main body 11 can be increased in a linear manner, so that brazing can be reliably and firmly performed. .
[0053]
In the above embodiment, two joint surfaces on the header pipe side (first and third joint surfaces 61 and 63) and two joint surfaces on the receiver main body side (second and fourth joint surfaces 62 and 64) are provided. However, the number of the joint surface on the header pipe side and the number of the joint surface on the receiver body side can be arbitrarily set. Further, the small-diameter cylindrical portion 12 and the large-diameter cylindrical portion 14 of the liquid receiver 10 may have a stepped shape having two or more diameters.
[0054]
【The invention's effect】
As described above, according to the present invention, since the configuration is as described above, the following excellent effects can be obtained.
[0055]
(1) According to the first aspect of the invention, the liquid receiver main body is formed by pressing, from one end of the cylindrical member to the other end, a small-diameter cylindrical portion, an intermediate cylindrical portion having a larger diameter than the small-diameter cylindrical portion, and Since it is formed in a stepped cylindrical shape having a large-diameter cylindrical portion having a larger diameter than the intermediate cylindrical portion, compared to a structure in which an unnecessary portion of the foot and the inner surface of the cylinder is cut from an extruded shape having a cylindrical portion and a foot. The material can be reduced, the weight can be reduced, and the operation of manufacturing the liquid receiver main body can be simplified. Moreover, even when the diameter of the liquid receiver main body is changed, it is possible to cope only by changing the diameter by press working.
[0056]
In addition, an aluminum connecting member is interposed between the intermediate cylindrical portion and the header pipe in the receiver main body, and the receiver main body and the header pipe are joined and fixed by brazing, so that the header pipe and the receiver pipe are received. Since the gap between the small-diameter cylindrical portion of the container main body can be widened, the thermal influence of the liquid receiver received from the high-temperature portion of the heat exchanger main body can be reduced, and the heat exchange efficiency is improved. be able to.
[0057]
(2) According to the second aspect of the present invention, the connecting member is provided on one side surface of the substantially flat base portion with the header pipe side joining surface abutting on the joining surface of the header pipe, and on the other side surface, the liquid receiver. A plate-shaped member provided with a receiver main body-side joining surface that abuts on a joining surface of the intermediate cylindrical portion of the main body, and a communication port for outflow and inflow of a heat medium provided in the header pipe and the receiver main body. By providing a connectable communication part, the area of the joint between the connecting member and the heat exchanger main body and the liquid receiver main body can be increased in a linear manner, so that brazing is reliably and firmly performed. Can be.
[Brief description of the drawings]
FIG. 1A is a front view showing an example of a heat exchanger with a liquid receiver according to the present invention, and FIG.
FIG. 2 is a sectional view of a main part showing a brazing portion between a header pipe and a liquid receiver according to the present invention.
FIG. 3 is a plan view (a) of an example of a connecting member according to the present invention, a sectional view (b) along an II line of (a), an enlarged side view (c), and an enlarged sectional view of a main part of (b). (D).
4A is a plan view of another connecting member according to the present invention, FIG. 4B is a sectional view taken along line II-II in FIG. 4A, FIG. 4B is an enlarged side view, and FIG. (D).
FIG. 5 is a schematic sectional view showing a step of forming the liquid receiver main body in the present invention.
[Explanation of symbols]
1 Condenser body (heat exchanger body)
2a, 2b header pipe
2c Heat medium inlet
2d Heat medium outlet
3 heat exchange tubes
4 Fins
6 plate members
6a, 6b through hole
9a Outflow hole (outlet for outflow)
9b Inflow hole (communication port for inflow)
10 Receiver
11 Receiver body
11A cylindrical member
12 Small diameter cylinder
13 Intermediate cylinder
14 Large diameter tube
18 Outflow port (communication port for outflow)
19 Inflow port (communication port for inflow)
60, 60A connecting member
60a flat base
61 1st joint surface (header pipe side joint surface)
62 Second joint surface (joint surface on receiver side)
63 Third joint surface (header pipe side joint surface)
64 Fourth joining surface (joining surface on the receiver body side)
71, 72 Pipe member (communication part)
71A Inflow communication section
72A Outflow communication section

Claims

アルミニウム製の一対のヘッダーパイプ間に互いに平行に複数の熱交換管を架設してなり、ヘッダーパイプに高温の熱媒体の流入口及び流出口を有する熱交換器本体と、アルミニウム製の略円筒状の受液器本体とをろう付けにより結合固定してなる受液器付き熱交換器において、
上記受液器本体は、プレス加工によって円筒状部材の一端から他端に向かって、小径筒部、該小径筒部より大径の中間筒部及び該中間筒部より大径の大径筒部を有する段付円筒状に形成され、
上記受液器本体における上記中間筒部と上記ヘッダーパイプとの間にアルミニウム製の連結部材を介在させて、受液器本体とヘッダーパイプとをろう付けにより結合固定してなる、ことを特徴とする受液器付き熱交換器。A plurality of heat exchange tubes are laid in parallel between a pair of aluminum header pipes, and a heat exchanger body having an inlet and an outlet for a high-temperature heat medium in the header pipe, and a substantially cylindrical aluminum tube. In a heat exchanger with a receiver, which is fixedly connected to the receiver body by brazing,
The liquid receiver main body includes a small-diameter cylindrical portion, an intermediate cylindrical portion having a larger diameter than the small-diameter cylindrical portion, and a large-diameter cylindrical portion having a larger diameter than the intermediate cylindrical portion, from one end to the other end of the cylindrical member by press working. Is formed in a stepped cylindrical shape having
An aluminum connecting member is interposed between the intermediate tubular portion and the header pipe in the liquid receiver main body, and the liquid receiver main body and the header pipe are fixedly connected by brazing, Heat exchanger with receiver.

請求項１記載の受液器付き熱交換器において、
上記連結部材は、略平坦状の基部の一側面に、ヘッダーパイプの接合面に当接するヘッダーパイプ側接合面を設け、他側面に、受液器本体の中間筒部の接合面に当接する受液器本体側接合面を設けた板状部材と、
上記ヘッダーパイプ及び受液器本体に設けられた熱媒体の流出用及び流入用の連通口に嵌合可能な連通部とを具備してなる、ことを特徴とする受液器付き熱交換器。The heat exchanger with a liquid receiver according to claim 1,
The connecting member is provided with a header pipe-side joining surface that abuts the joining surface of the header pipe on one side surface of the substantially flat base, and a receiving portion that abuts on the joining surface of the intermediate cylinder portion of the receiver main body on the other side surface. A plate-shaped member provided with a liquid container main body side joining surface,
A heat exchanger with a liquid receiver, comprising: a communication portion provided in the header pipe and the liquid receiver main body, the communication portion being capable of being fitted into a communication port for outflow and inflow of the heat medium.