JPH10141889A - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
JPH10141889A
JPH10141889A JP29690696A JP29690696A JPH10141889A JP H10141889 A JPH10141889 A JP H10141889A JP 29690696 A JP29690696 A JP 29690696A JP 29690696 A JP29690696 A JP 29690696A JP H10141889 A JPH10141889 A JP H10141889A
Authority
JP
Japan
Prior art keywords
tube
mounting wall
hole
heat exchanger
tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP29690696A
Other languages
Japanese (ja)
Inventor
Asao Tokiwa
浅夫 常盤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Materials Corp
Original Assignee
Mitsubishi Materials Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Materials Corp filed Critical Mitsubishi Materials Corp
Priority to JP29690696A priority Critical patent/JPH10141889A/en
Publication of JPH10141889A publication Critical patent/JPH10141889A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

PROBLEM TO BE SOLVED: To prevent cracking near an included angle part eventually breaking a bent part, a problem that has so far occurred in the formation of the bent part of a mounted wall part because of the included angle part existing in a through hole. SOLUTION: This heat exchanger is provided with headers 1 facing each other and a plurality of tubes 2 arranged in parallel between the headers 1 to perform a heat exchange between an internal fluid flowing through the tubes 2 and an external fluid flowing along the external surfaces of the tubes 2. In this case, a through hole 15 for mounting the tubes is formed in mounting wall parts 5 of the headers 1 and an angle cut off part 5b is formed at an angle part between the surface 5a of the mounting wall part 5 and the internal surface 15a of the through hole. The tubes 2 are inserted into the through holes 15 and a solder material 17 is melted into each recessed part 16 formed by the cut off surface 5b and the external surface of the tubes 2 to fix the tubes 2 on the mounting wall parts 5.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、例えば車両におけ
る過給機を用いた内燃機関の吸入気を冷却するのに用い
て好適な熱交換器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger suitable for cooling intake air of an internal combustion engine using a supercharger in a vehicle, for example.

【０００２】[0002]

【従来の技術】周知のように、車両等に用いられる過給
機を用いた内燃機関において、熱効率を高め、出力を向
上させる目的で、該内燃機関の吸入気を冷却する熱交換
器が使用されている。この種の熱交換器として、チュー
ブの内部を流れる吸入気である内部流体と前記チューブ
の外面に沿って流れる外気である外部流体との間で熱交
換させるものが多用されており、図４に示す構成が知ら
れている。2. Description of the Related Art As is well known, in an internal combustion engine using a supercharger used in a vehicle or the like, a heat exchanger for cooling intake air of the internal combustion engine is used for the purpose of increasing thermal efficiency and improving output. Have been. As this kind of heat exchanger, a heat exchanger that exchanges heat between an internal fluid, which is intake air flowing inside the tube, and an external fluid, which is external air flowing along the outer surface of the tube, is frequently used. The configuration shown is known.

【０００３】図４は、過給機を用いた内燃機関に熱交換
器を適用した熱交換器を示す斜視図である。この熱交換
器は、図示しない該熱交換器に対して左方に位置する吸
入気を圧送するための過給機と、図示しない該熱交換器
に対して右方に位置する吸入気を吸入する内燃機関との
間に配されているものである。FIG. 4 is a perspective view showing a heat exchanger in which a heat exchanger is applied to an internal combustion engine using a supercharger. The heat exchanger includes a supercharger for pumping suction air positioned to the left of the heat exchanger (not shown) and a suction air positioned to the right of the heat exchanger (not shown). Between the internal combustion engine and the internal combustion engine.

【０００４】図４において、符号１はヘッダー、２はチ
ューブである。ヘッダー１は、内部が中空の矩形板状体
であって、チューブ２を挟み対向させて図において左右
に二つ配置されている。また、ヘッダー１は、左右のヘ
ッダー１、１の対向する側の面にチューブ２を取り付け
るための取付壁部５を有している。ヘッダー１の内部
は、内部流体である吸入気を流通させることが可能なよ
うに中空となっている。なお、左右のヘッダー１、１の
取付壁部５に対して反対側の壁部には、吸入気を流入・
流出させるための流通管６、６が取り付けられている。In FIG. 4, reference numeral 1 denotes a header, and 2 denotes a tube. The header 1 is a rectangular plate-like body having a hollow inside, and two headers 1 are arranged on the left and right in the figure so as to face each other with the tube 2 interposed therebetween. Further, the header 1 has a mounting wall 5 for mounting the tube 2 on the surface of the left and right headers 1 and 1 facing each other. The inside of the header 1 is hollow so that the intake air as the internal fluid can flow. In addition, the intake air flows into the wall opposite to the mounting wall 5 of the left and right headers 1 and 1.
Flow pipes 6 for flowing out are attached.

【０００５】チューブ２は、左右のヘッダー１、１間に
その長さ方向を左右に延在させて並列に複数配置され、
該チューブ２の左右の両端部が取付壁部５に固定されて
いる。この場合、チューブ２は、該チューブ２の内部空
間が左右のヘッダー１、１の内部空間と連通されるよう
に取り付けられている。チューブ２の長さ方向に直交す
る断面の輪郭は、角部が鋭角をなす狭角部１０を有する
偏平の略平行四辺形形状となっている。チューブ２の内
部空間には、連続する凹凸面を有するインナフィン１１
が挿入されている。このインナフィン１１は、その凹凸
面がチューブ２の内壁に接触するように固定されてい
る。隣合うチューブ２、２間には、波形形状の断面を有
するアウタフィン１２が配設されている。このアウタフ
ィン１２は、波形形状断面の山と谷の部分がチューブ２
の外面と接触するように固定されている。A plurality of tubes 2 are arranged in parallel between the left and right headers 1 and 1 with their length direction extending left and right.
Left and right ends of the tube 2 are fixed to the mounting wall 5. In this case, the tube 2 is attached such that the internal space of the tube 2 communicates with the internal spaces of the left and right headers 1 and 1. The profile of the cross section orthogonal to the longitudinal direction of the tube 2 is a flat, substantially parallelogram having a narrow angle portion 10 having an acute angle. An inner fin 11 having a continuous uneven surface is provided in the inner space of the tube 2.
Is inserted. The inner fin 11 is fixed so that its uneven surface comes into contact with the inner wall of the tube 2. An outer fin 12 having a corrugated cross section is disposed between the adjacent tubes 2. The outer fin 12 has a peak and a valley portion of a corrugated cross section,
Is fixed so as to be in contact with the outer surface.

【０００６】以上の構成に基づいて、以下に熱交換器の
機能を説明する。吸入気は、図示しない熱交換器に対し
て左方に位置する過給機を通過した後、熱交換器を通っ
て、図示しない右方に位置する内燃機関へと流れる。熱
交換器内を流れる吸入気は、図４において左方から右方
へ流れる。つまり、吸入気は、左方の流通管６を通り、
左方のヘッダー１、チューブ２、右方のヘッダー１、右
方の流通管６の順に流れる。チューブ２内を流れるとき
は、該吸入気がインナフィン１１およびチューブ２の内
面に接触しながら流れる。一方、外部流体である外気
は、前記吸入気が流れる方向に対して直角の方向に流れ
る。この場合、外気はアウタフィン１２およびチューブ
２の外面と接触しながら流れる。過給機を通過した後の
吸入気は、過給機に用いられるタービンブレードが高温
となっているため、または圧縮による圧縮熱等の理由に
より、外気に比べ高温となっている。この高温となった
吸入気は、該吸入気がチューブ２内を左方から右方に通
過する間に、吸入気の熱がインナフィン１１、チューブ
２の壁部、アウタフィン１２を介して外気に輸送される
ことにより冷却される。この場合に、吸入気と外気がそ
れぞれインナフィン１１とアウタフィン１２と接触しな
がら流れるので、伝熱面積を大きくとることができ熱伝
達が促進され、より大きな冷却効果が得られている。[0006] Based on the above configuration, the function of the heat exchanger will be described below. The intake air passes through a supercharger located on the left side of a heat exchanger (not shown), and then flows through the heat exchanger to an internal combustion engine located on the right side (not shown). The intake air flowing in the heat exchanger flows from left to right in FIG. In other words, the intake air passes through the left circulation pipe 6,
It flows in the order of the left header 1, the tube 2, the right header 1, and the right circulation pipe 6. When flowing through the tube 2, the suction air flows while contacting the inner fin 11 and the inner surface of the tube 2. On the other hand, outside air, which is an external fluid, flows in a direction perpendicular to the direction in which the suction air flows. In this case, the outside air flows while contacting the outer fin 12 and the outer surface of the tube 2. The intake air after passing through the supercharger has a higher temperature than the outside air because the turbine blades used in the supercharger have a high temperature or due to heat of compression due to compression. The high-temperature intake air is transported to the outside air via the inner fins 11, the wall of the tube 2, and the outer fins 12 while the intake air passes through the tube 2 from left to right. It is cooled by doing. In this case, the intake air and the outside air flow while contacting the inner fin 11 and the outer fin 12, respectively, so that a large heat transfer area can be obtained, heat transfer is promoted, and a greater cooling effect is obtained.

【０００７】次に、チューブ２と取付壁部５との接続部
１３付近の説明を図５および図６に基づいて説明する。
図５は、図４において流通管６および取付壁部５を除く
ヘッダー１を取り除いた構成を示す斜視図である。チュ
ーブ２は、その端部を取付壁部５に形成された貫通孔１
５に挿入され固定されている。貫通孔１５は、チューブ
２の長さ方向に直交する断面輪郭である略平行四辺形と
同等の形状を有し、チューブ２が挿入可能なように該チ
ューブ２の断面輪郭よりも若干大きな形状とされてい
る。Next, the vicinity of the connection portion 13 between the tube 2 and the mounting wall portion 5 will be described with reference to FIGS.
FIG. 5 is a perspective view showing a configuration in which the header 1 except for the flow pipe 6 and the mounting wall 5 in FIG. 4 is removed. The tube 2 has a through hole 1 formed at its end in the mounting wall 5.
5 and fixed. The through hole 15 has a shape equivalent to a substantially parallelogram which is a cross-sectional profile orthogonal to the longitudinal direction of the tube 2, and has a shape slightly larger than the cross-sectional profile of the tube 2 so that the tube 2 can be inserted. Have been.

【０００８】図６は、チューブ２と取付壁部５との接続
部１３付近を拡大した切断面を含む斜視図である。図に
おいて、接続部１３は、上下方向に延在する取付壁部５
に形成された貫通孔１５に、水平方向に配されたチュー
ブ２の端部を挿入した状態を示している。取付壁部５
は、貫通孔１５の周部付近に図において上方に曲げられ
た折曲部１８を有する。チューブ２は、その外面を前記
折曲部１８の貫通孔１５側の面に当接させて、貫通孔１
５に挿入されている。チューブ２の外面と前記折曲部１
８の図における下面とで形成される凹部１６には、ロウ
材１７が溶け込んでいる。FIG. 6 is a perspective view including an enlarged cut surface near the connecting portion 13 between the tube 2 and the mounting wall portion 5. In the figure, the connecting portion 13 is a mounting wall portion 5 extending in the vertical direction.
2 shows a state in which the end of the tube 2 arranged in the horizontal direction is inserted into the through hole 15 formed in FIG. Mounting wall 5
Has a bent portion 18 bent upward in the figure near the periphery of the through hole 15. The tube 2 has its outer surface in contact with the surface of the bent portion 18 on the through hole 15 side, and
5 is inserted. The outer surface of the tube 2 and the bent portion 1
8, the brazing material 17 is melted in the concave portion 16 formed by the lower surface in FIG.

【０００９】チューブ２と取付壁部５との固定は、以下
の手順で行われる。まず、取付壁部５となる板状の部材
に略平行四辺形の孔を形成し、バーリング加工により前
記孔の周りの縁部を板厚方向に立ち上げることにより、
貫通孔１５および折曲部１８を形成する。チューブ２を
前記貫通孔１５に挿入し、折曲部１８の貫通孔１５側の
面でチューブ２の外面を当接させて固定する。ロウ材１
７を前記凹部１６に流し込み、該ロウ材１７を冷却固化
させてチューブ２と取付壁部５を堅固に固定する。The fixing of the tube 2 to the mounting wall 5 is performed in the following procedure. First, a substantially parallelogram-shaped hole is formed in a plate-shaped member serving as the mounting wall portion 5, and an edge around the hole is raised in a plate thickness direction by a burring process.
A through hole 15 and a bent portion 18 are formed. The tube 2 is inserted into the through hole 15, and the outer surface of the tube 2 is abutted on the surface of the bent portion 18 on the side of the through hole 15 and fixed. Brazing material 1
7 is poured into the recess 16 and the brazing material 17 is cooled and solidified to firmly fix the tube 2 and the mounting wall 5.

【００１０】以上説明したように、折曲部１８は、チュ
ーブ２をロウ付け前に固定し、ロウ材１７を流し込む凹
部を形成するという役割を果たしている。As described above, the bent portion 18 has a role of fixing the tube 2 before brazing and forming a recess into which the brazing material 17 is poured.

【００１１】[0011]

【発明が解決しようとする課題】ところで、上記の熱交
換器においては、バーリング加工による折曲部１８の形
成において、以下の問題が生じていた。貫通孔１５が略
平行四辺形形状であり狭角部１０を有するため、バーリ
ング加工による折曲部１８の形成時において狭角部１０
付近で亀裂が入り折曲部１８が割れることがあるという
問題があった。折曲部１８が割れてしまうと、ロウ材１
７をチューブ２の外面と折曲部１８で形成される凹部１
６に流し込んでも、折曲部１８の割れた部分からロウ材
１７が流出するだけで、この割れた部分を塞ぐことがで
きない。そのため、ヘッダー１およびチューブ２内を流
れる吸入気がこの割れた部分から漏れてしまうという不
都合が生じていた。ゆえに、熱交換器の製造過程におい
て、製品の不良品率が高まり、製品のコストの増大を招
いていた。However, in the above-described heat exchanger, the following problem has occurred in forming the bent portion 18 by burring. Since the through-hole 15 has a substantially parallelogram shape and has the narrow-angle portion 10, the narrow-angle portion 10 is formed when the bent portion 18 is formed by burring.
There is a problem that a crack is formed in the vicinity and the bent portion 18 may be broken. If the bent portion 18 breaks, the brazing material 1
7 is a concave portion 1 formed by the outer surface of the tube 2 and the bent portion 18
Even if it is poured into 6, the brazing material 17 flows out only from the broken portion of the bent portion 18, and the broken portion cannot be closed. For this reason, there has been a problem that the intake air flowing through the header 1 and the tube 2 leaks from the broken portion. Therefore, in the manufacturing process of the heat exchanger, the rejection rate of the product is increased, and the cost of the product is increased.

【００１２】本発明は、上記課題に鑑みてなされたもの
で、ヘッダーにチューブをロウ付けする構成を有する熱
交換器を、不良品率が低く、信頼性が高く、安価に提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a heat exchanger having a configuration in which a tube is brazed to a header, having a low reject rate, high reliability, and low cost. And

【００１３】[0013]

【課題を解決するための手段】本発明の熱交換器は、上
記課題を解決するため、以下の手段を採用した。請求項
１記載の熱交換器は、対向配置されたヘッダーと、これ
らヘッダー間に並列に配置された複数のチューブとを備
えてなり、前記チューブの内部を流れる内部流体と前記
チューブの外面に沿って流れる外部流体との間で熱交換
させる熱交換器において、前記ヘッダーの取付壁部に
は、チューブ取付用の貫通孔が形成され、取付壁部の表
面と前記貫通孔内面とのなす角部には、該角部を欠落さ
せた欠落面が形成され、前記貫通孔内に前記チューブが
挿入配置され、前記欠落面と前記チューブの外面とで形
成される凹部内にロウ材が溶かし込まれて、該チューブ
が前記取付壁部に固定されているむことを特徴とする。
この熱交換器によれば、取付壁部の表面と貫通孔内面と
のなす角部を欠落させた欠落面とチューブ外面とで形成
される凹部内にロウ材を流し込み、該ロウ材を冷却固化
させることにより取付壁部とチューブとを固定すること
が可能となる。The heat exchanger of the present invention employs the following means in order to solve the above problems. The heat exchanger according to claim 1, further comprising: headers arranged opposite to each other; and a plurality of tubes arranged in parallel between the headers, the inner fluid flowing inside the tubes and the outer surface of the tubes. In the heat exchanger for exchanging heat with an external fluid flowing through, a through hole for mounting a tube is formed in the mounting wall of the header, and a corner formed between the surface of the mounting wall and the inner surface of the through hole. A cut-off surface formed by cutting off the corner is formed, the tube is inserted into the through-hole, and a brazing material is melted into a recess formed by the cut-off surface and the outer surface of the tube. Thus, the tube is fixed to the mounting wall.
According to this heat exchanger, the brazing material is poured into the recess formed by the cut surface formed by removing the corner formed by the surface of the mounting wall and the inner surface of the through hole and the outer surface of the tube, and the brazing material is cooled and solidified. By doing so, the mounting wall and the tube can be fixed.

【００１４】請求項２記載の熱交換器は、請求項１記載
の熱交換器において、前記欠落面が前記取付壁部の表面
側および裏面側の双方に形成されていることを特徴とす
る。この熱交換器によれば、欠落面が表面側および裏面
側の双方に形成されているので、前記凹部を表面側およ
び裏面側の両面に形成することが可能となる。According to a second aspect of the present invention, in the heat exchanger of the first aspect, the missing surface is formed on both the front side and the back side of the mounting wall. According to this heat exchanger, since the missing surface is formed on both the front side and the back side, the concave portion can be formed on both the front side and the back side.

【００１５】請求項３記載の熱交換器は、請求項１また
は請求項２記載の熱交換器において、前記チューブは、
該チューブの長さ方向に直交する断面輪郭が多角形とさ
れ、少なくともその一部の角部が鋭角をなす狭角部とさ
れていることを特徴とする。この熱交換器によれば、チ
ューブの断面輪郭が多角形で、その一部の角部が鋭角を
なす狭角部となっているチューブを有する熱交換器を提
供することが可能となる。The heat exchanger according to claim 3 is the heat exchanger according to claim 1 or 2, wherein the tube is
A cross-sectional profile orthogonal to the longitudinal direction of the tube is a polygon, and at least a part of the cross-section is a narrow angle portion forming an acute angle. According to this heat exchanger, it is possible to provide a heat exchanger having a tube in which the cross-sectional contour of the tube is polygonal, and a part of the tube is a narrow angle portion forming an acute angle.

【００１６】[0016]

【発明の実施の形態】以下、本発明の実施の形態を、図
１を参照して説明する。なお、これらの図において従来
の技術で示した図４、図５、および図６と共通する部分
については、同一符号を付し、その説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In these drawings, the same reference numerals are given to portions common to FIGS. 4, 5 and 6 shown in the related art, and the description thereof will be omitted.

【００１７】図１は、本発明の実施の形態を示す切断面
を含む斜視図である。この図は、従来の技術で示した図
６と同様にチューブ２と取付壁部５との接続部１３の拡
大図を示している。ヘッダー１は、板状の取付壁部５を
有しており、該取付壁部５には、狭角部１０を有する略
平行四辺形形状の貫通孔１５が形成されている。この貫
通孔１５には、長さ方向に直交する断面の輪郭が狭角部
１０を有する略平行四辺形形状のチューブ２が挿入配置
されている。FIG. 1 is a perspective view including a cut surface showing an embodiment of the present invention. This figure is an enlarged view of the connecting portion 13 between the tube 2 and the mounting wall 5 as in FIG. 6 shown in the prior art. The header 1 has a plate-shaped mounting wall portion 5, and a substantially parallelogram-shaped through hole 15 having a narrow angle portion 10 is formed in the mounting wall portion 5. In the through hole 15, the tube 2 having a substantially parallelogram shape having a narrow-angle portion 10 is inserted and arranged in a cross section perpendicular to the length direction.

【００１８】本実施の形態は、従来の技術である図６と
取付壁部５の該取付壁部５に形成された貫通孔１５付近
の周縁部の形状において異なり、その点について以下に
説明する。取付壁部５の貫通孔１５の輪郭を形成する周
縁部には、該取付壁部５の表面５ａと貫通孔内面１５ａ
とのなす角部には、該角部を欠落させた欠落面５ｂが形
成されている。同様に、取付壁部５の裏面５ｃと貫通孔
内面１５ａとのなす角部にも、該角部を欠落させた欠落
面５ｂが形成されている。ロウ材１７は、前記欠落面５
ｂとチューブ２の外面とで形成される凹部１６に流し込
まれている。This embodiment differs from the prior art in FIG. 6 in the shape of the peripheral edge near the through hole 15 formed in the mounting wall 5 of the mounting wall 5, and that point will be described below. . A peripheral portion forming the contour of the through hole 15 of the mounting wall portion 5 has a surface 5a of the mounting wall portion 5 and a through hole inner surface 15a.
Is formed with a missing surface 5b in which the corner is cut off. Similarly, the corner formed between the back surface 5c of the mounting wall 5 and the inner surface 15a of the through hole is also formed with a cutout surface 5b in which the corner is cut off. The brazing material 17 is provided on the missing surface 5.
b and the outer surface of the tube 2.

【００１９】次に、本実施の形態における熱交換器の、
チューブ２と取付壁部５との接続部１３の製造方法を図
２と図３に基づいて説明する。Next, the heat exchanger of the present embodiment
A method of manufacturing the connecting portion 13 between the tube 2 and the mounting wall 5 will be described with reference to FIGS.

【００２０】図２は、取付壁部５に形成される貫通孔１
５を形成する打抜工程を示す断面図である。図におい
て、取付壁部５は、貫通孔１５形成前の状態であり、符
号２１は打ち抜きのために使用するポンチ、２２も同様
に打ち抜きのために使用するダイである。FIG. 2 shows a through hole 1 formed in the mounting wall 5.
It is sectional drawing which shows the punching process which forms 5. In the drawing, the mounting wall portion 5 is in a state before the formation of the through-hole 15, reference numeral 21 is a punch used for punching, and reference numeral 22 is a die similarly used for punching.

【００２１】取付壁部５は、該取付壁部５の主要構成材
料である母材２３と、該母材２３の上面および下面に形
成された低融点金属層２４とからなる三層構造のクラッ
ド材となっている。母材２３は、６５０℃前後の融点を
有するＪＩＳ規格のＡ３０００番台のアルミニウム合金
を用いている。低融点金属層２４は、前記母材２３の融
点よりも低融点である１８０℃前後の融点を有するＪＩ
Ｓ規格のＡ４０００番台のアルミニウム合金を用いてい
る。The mounting wall portion 5 has a three-layered cladding comprising a base material 23 which is a main constituent material of the mounting wall portion 5 and a low melting point metal layer 24 formed on the upper and lower surfaces of the base material 23. Material. As the base material 23, an aluminum alloy of JIS A3000 series having a melting point of about 650 ° C. is used. The low melting point metal layer 24 has a melting point of about 180 ° C. which is lower than the melting point of the base material 23.
Aluminum alloy of A4000 series of S standard is used.

【００２２】ポンチ２１は、取付壁部５の上方に位置
し、該ポンチ２１の水平面２１ａから下方へ突出する突
出部２１ｂを有している。この突出部２１ｂと前記水平
面２１ａとがなす角部には、該水平面２１ａから斜め下
方に立ち下がる上側欠落面形成面２１ｃが形成されてい
る。The punch 21 is located above the mounting wall 5 and has a protruding portion 21b protruding downward from a horizontal surface 21a of the punch 21. At the corner formed by the protruding portion 21b and the horizontal plane 21a, an upper cut-off surface forming surface 21c that falls obliquely downward from the horizontal plane 21a is formed.

【００２３】ダイ２２は、取付壁部５の下方に位置し、
前記ポンチ２１の突出部２１ｂが挿入されるための孔部
２２ｂを有している。ダイ２２の前記孔部２２ｂの周縁
部には、該ダイ２２の水平面２２ａから一部突起する突
起部２２ｃが形成されている。この突起部２２ｃは、ダ
イ２２の水平面２２ａから斜め上方に立ち上がる下側欠
落面形成面２２ｄを有している。The die 22 is located below the mounting wall 5,
The punch 21 has a hole 22b into which the protrusion 21b is inserted. A projecting portion 22c that partially projects from a horizontal surface 22a of the die 22 is formed at a peripheral edge of the hole 22b of the die 22. The protruding portion 22c has a lower missing surface forming surface 22d which rises obliquely upward from a horizontal surface 22a of the die 22.

【００２４】取付壁部５に貫通孔１５を形成する打ち抜
きは、以下のように行われる。取付壁部５をポンチ２１
およびダイ２２で挟み、ポンチ２１の突出部２１ｂがダ
イ２２の孔部２２ｂに挿入されるように、ポンチ２１を
ダイ２２に押しつける。そして、ポンチ２１の突出部２
１ｂがダイ２２の孔部２２ｂに挿入されることにより、
貫通孔１５が打ち抜かれる。この時にポンチ２１の上側
欠落面形成面２１ｃとダイ２２の下側欠落面形成面２２
ｄにより、取付壁部５に欠落面５ｂが形成される。The punching for forming the through hole 15 in the mounting wall 5 is performed as follows. Punch 21 with mounting wall 5
Then, the punch 21 is pressed against the die 22 so that the protrusion 21 b of the punch 21 is inserted into the hole 22 b of the die 22. Then, the projecting portion 2 of the punch 21
1b is inserted into the hole 22b of the die 22,
The through hole 15 is punched. At this time, the upper surface 21c of the punch 21 and the lower surface 22 of the die 22 are formed.
With d, a missing surface 5b is formed in the mounting wall portion 5.

【００２５】取付壁部５とチューブ２とのロウ付けによ
る固定は、以下のように行われる。上述のように取付壁
部５に形成された貫通孔１５に、図３に示すようにチュ
ーブ２を挿入する。そして、取付壁部５およびチューブ
２を加熱する。すると、クラッド材である取付壁部５の
低融点金属層２４が溶かされ、チューブ２の外面と欠落
面５ｂとで形成する凹部１６に溶かされた低融点金属２
４が流れ込む。その後、冷却して低融点金属２４を固化
させることにより、チューブ２と取付壁部５とが堅固に
固定される（図１参照）。この場合、前記凹部１６に流
れ込んだ低融点金属２４はロウ材１７として用いられて
いる。The fixing of the mounting wall 5 and the tube 2 by brazing is performed as follows. The tube 2 is inserted into the through hole 15 formed in the mounting wall 5 as described above, as shown in FIG. Then, the mounting wall 5 and the tube 2 are heated. Then, the low melting point metal layer 24 of the mounting wall portion 5 which is a clad material is melted, and the low melting point metal layer 2 melted in the concave portion 16 formed by the outer surface of the tube 2 and the missing surface 5b.
4 flows. Thereafter, the tube 2 and the mounting wall 5 are firmly fixed by cooling to solidify the low melting point metal 24 (see FIG. 1). In this case, the low-melting metal 24 flowing into the recess 16 is used as the brazing material 17.

【００２６】上記の熱交換器によれば、取付壁部５の貫
通孔１５付近の周縁部に欠落面５ｂを有する構成とした
ので、該欠落面５ｂとチューブ２の外面とで形成される
凹部１６にロウ材１７が流れ込むことになり、従来バー
リング加工により折曲部１８（図６参照）を形成して、
チューブ２の外面との間に凹部１６を形成していた方法
をとる必要がなくなった。そのため、狭角部１０を有す
る貫通孔１５に折曲部１８を形成すると、該狭角部１０
付近で折曲部１８が割れてしまうというバーリング加工
の欠点を回避することが可能となる。According to the above-described heat exchanger, since the notch surface 5b is formed at the peripheral edge near the through hole 15 of the mounting wall portion 5, the concave portion formed by the notch surface 5b and the outer surface of the tube 2 is formed. The brazing material 17 flows into the material 16, and a bent portion 18 (see FIG. 6) is formed by a conventional burring process.
It is no longer necessary to adopt the method in which the concave portion 16 is formed between the outer surface of the tube 2 and the outer surface. Therefore, when the bent portion 18 is formed in the through hole 15 having the narrow-angle portion 10, the narrow-angle portion 10
It is possible to avoid the disadvantage of the burring process in which the bent portion 18 is broken in the vicinity.

【００２７】なお、本実施の形態において、チューブ２
の長さ方向に直交する断面輪郭を略平行四辺形形状とし
たが、一部の角部が狭角部を有する断面輪郭であればよ
く、例えば該断面の周部に突起を有する略星形形状であ
ってもよい。また、取付壁部５に欠落面５ｂを形成する
方法として、ポンチ２１とダイ２２の組み合わせによる
打抜工程と同時に欠落面５ｂを形成する方法を説明した
が、特にこの方法にとらわれるものではなく、取付壁部
５に貫通孔１５を形成した後に、取付壁部の表面５ａと
貫通孔内面１５ａとのなす角部を除去加工する方法であ
ってもよい。In this embodiment, the tube 2
Although the cross-sectional profile orthogonal to the length direction is a substantially parallelogram shape, it may be a cross-sectional profile in which some corners have a narrow corner portion, for example, a substantially star shape having a protrusion on the periphery of the cross-section. It may be shaped. In addition, as a method of forming the missing surface 5b on the mounting wall portion 5, a method of forming the missing surface 5b simultaneously with the punching step by combining the punch 21 and the die 22 has been described. However, the method is not particularly limited to this method. After the through hole 15 is formed in the mounting wall 5, a method of removing a corner formed between the surface 5a of the mounting wall and the inner surface 15a of the through hole may be employed.

【００２８】[0028]

【発明の効果】以上説明したとおり、本発明の熱交換器
によれば、以下の効果が得られる。本発明の熱交換器
は、取付壁部の表面と貫通孔内面とのなす角部に欠落面
を形成することにより、該欠落面とチューブの外面との
間に凹部を形成することが可能な構成としたので、欠落
面を形成する際に、曲げによる塑性変形を用いないで済
むので、取付壁部の該取付壁部に形成された貫通孔の周
縁部に割れが生じる可能性がなくなる。よって、チュー
ブの長さ方向に直交する断面輪郭が多角形であり、その
一部の角部が鋭角をなす狭角部となっている場合に、該
チューブを挿入する貫通孔の形状が狭角部を有する形状
となっていても、取付壁部に割れが生じる可能性がなく
なる。したがって、チューブの断面輪郭の形状が狭角部
を有していても、取付壁部とロウ付けによりチューブを
固定することが可能となる。そのため、熱交換器の製造
時において不良品率を低下させることができ、製品の信
頼性を高めることが可能となる。結果として、熱交換器
を安価に提供することが可能となる。また、欠落面が取
付壁部の表面および裏面に形成される構成としたので、
凹部が取付壁部の表面側および裏面側に形成されること
になり、該凹部にロウ材を流し込みロウ付けすることに
より、より堅固にチューブと取付壁部を固定することが
可能となる。As described above, according to the heat exchanger of the present invention, the following effects can be obtained. The heat exchanger of the present invention can form a recess between the missing surface and the outer surface of the tube by forming the missing surface at the corner formed by the surface of the mounting wall and the inner surface of the through hole. With this configuration, it is not necessary to use plastic deformation due to bending when forming the missing surface, so that there is no possibility that a crack is generated in the peripheral portion of the through hole formed in the mounting wall of the mounting wall. Therefore, when the cross-sectional profile orthogonal to the length direction of the tube is a polygon, and a part of the corner is a narrow angle forming an acute angle, the shape of the through hole into which the tube is inserted is narrow. Even if it has a shape having a portion, there is no possibility that the mounting wall portion will be cracked. Therefore, even if the cross-sectional profile of the tube has a narrow angle portion, the tube can be fixed by brazing to the mounting wall portion. Therefore, the reject rate can be reduced during the manufacture of the heat exchanger, and the reliability of the product can be increased. As a result, the heat exchanger can be provided at low cost. Also, since the missing surface is formed on the front surface and the back surface of the mounting wall portion,
The recesses are formed on the front side and the back side of the mounting wall, and the tube and the mounting wall can be more firmly fixed by pouring and brazing a brazing material into the recesses.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 本発明の実施の形態である熱交換器の取付壁
部とチューブとの接続部を示す断面を含む斜視図であ
る。FIG. 1 is a perspective view including a cross section showing a connecting portion between a mounting wall portion and a tube of a heat exchanger according to an embodiment of the present invention.

【図２】 図１に示す取付壁部の貫通孔を形成する過程
を示す断面図である。FIG. 2 is a cross-sectional view showing a process of forming a through hole in the mounting wall shown in FIG.

【図３】 図１に示す取付壁部の貫通孔にチューブを挿
入したロウ付け前の状態を示す断面図である。FIG. 3 is a sectional view showing a state before brazing in which a tube is inserted into a through hole of a mounting wall portion shown in FIG. 1;

【図４】 従来の技術である熱交換器を示す斜視図であ
る。FIG. 4 is a perspective view showing a conventional heat exchanger.

【図５】 図４の熱交換器の取付壁部を除くヘッダーを
外した状態を示す斜視図である。5 is a perspective view showing a state in which a header excluding a mounting wall portion of the heat exchanger of FIG. 4 is removed.

【図６】 図５のＡ−Ａにおける断面を含む取付壁部と
チューブとの接続部を示す斜視図である。6 is a perspective view showing a connecting portion between the mounting wall portion and the tube including a cross section taken along line AA of FIG. 5;

【符号の説明】[Explanation of symbols]

１ ヘッダー ２ チューブ ５ 取付壁部 ５ａ 取付壁部の表面 ５ｂ 欠落面 ５ｃ 取付壁部の裏面 １０ 狭角部 １５ 貫通孔 １５ａ 貫通孔内面 １６ 凹部 １７ ロウ材 Reference Signs List 1 header 2 tube 5 mounting wall 5a surface of mounting wall 5b missing surface 5c back of mounting wall 10 narrow corner 15 through hole 15a inner surface of through hole 16 recess 17 brazing material

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 対向配置されたヘッダーと、これらヘッ
ダー間に並列に配置された複数のチューブとを備えてな
り、 前記チューブの内部を流れる内部流体と前記チューブの
外面に沿って流れる外部流体との間で熱交換させる熱交
換器において、 前記ヘッダーの取付壁部には、チューブ取付用の貫通孔
が形成され、該取付壁部の表面と前記貫通孔内面とのな
す角部には、該角部を欠落させた欠落面が形成され、 前記貫通孔内に前記チューブが挿入配置され、 前記欠落面と前記チューブの外面とで形成される凹部内
にロウ材が溶かし込まれて、 該チューブが前記取付壁部に固定されていることを特徴
とする熱交換器。1. An internal fluid flowing inside the tube and an external fluid flowing along an outer surface of the tube, comprising: headers arranged opposite to each other; and a plurality of tubes arranged in parallel between the headers. In a heat exchanger for exchanging heat between, a through hole for mounting a tube is formed in the mounting wall of the header, and a corner formed between a surface of the mounting wall and an inner surface of the through hole includes: A cutout surface having a corner portion is formed, the tube is inserted and arranged in the through hole, and a brazing material is melted into a recess formed by the cutout surface and an outer surface of the tube. Is fixed to the mounting wall. 【請求項２】 請求項１記載の熱交換器において、 前記欠落面が前記取付壁部の表面側および裏面側の双方
に形成されていることを特徴とする熱交換器。2. The heat exchanger according to claim 1, wherein the missing surface is formed on both the front side and the back side of the mounting wall. 【請求項３】 請求項１または請求項２記載の熱交換器
において、 前記チューブは、該チューブの長さ方向に直交する断面
輪郭が多角形とされ、 少なくともその一部の角部が鋭角をなす狭角部とされて
いることを特徴とする熱交換器。3. The heat exchanger according to claim 1, wherein the tube has a polygonal cross-sectional profile orthogonal to the longitudinal direction of the tube, and at least a part of the tube has an acute angle. A heat exchanger having a narrow angle portion.
JP29690696A 1996-11-08 1996-11-08 Heat exchanger Withdrawn JPH10141889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29690696A JPH10141889A (en) 1996-11-08 1996-11-08 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29690696A JPH10141889A (en) 1996-11-08 1996-11-08 Heat exchanger

Publications (1)

Publication Number Publication Date
JPH10141889A true JPH10141889A (en) 1998-05-29

Family

ID=17839699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29690696A Withdrawn JPH10141889A (en) 1996-11-08 1996-11-08 Heat exchanger

Country Status (1)

Country Link
JP (1) JPH10141889A (en)

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