JPH02309192A - Double pipe type heat exchanger made of aluminum - Google Patents
Double pipe type heat exchanger made of aluminumInfo
- Publication number
- JPH02309192A JPH02309192A JP13184589A JP13184589A JPH02309192A JP H02309192 A JPH02309192 A JP H02309192A JP 13184589 A JP13184589 A JP 13184589A JP 13184589 A JP13184589 A JP 13184589A JP H02309192 A JPH02309192 A JP H02309192A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- pipe
- heat exchanger
- aluminum
- outer tube
- 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.)
- Granted
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000005219 brazing Methods 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 238000005476 soldering Methods 0.000 abstract description 6
- 229910000679 solder Inorganic materials 0.000 abstract description 4
- 239000010410 layer Substances 0.000 abstract 3
- 239000000126 substance Substances 0.000 abstract 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は自動車用の水冷オイルクーラー等に用いられ
る二重管式熱交換器、特にアルミニウム製の二重管式熱
交換器に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a double-tube heat exchanger used in water-cooled oil coolers for automobiles, etc., and particularly to a double-tube heat exchanger made of aluminum.
なおこの明細書において、アルミニウムの語はその合金
を含む意味で用いる。In this specification, the term aluminum is used to include its alloys.
従来の技術
二重管式熱交換器は、一般に、アルミニウムからなる内
管と外管との径方向の隙間が長さ方向の一部において閉
塞されることにより内管と外管との間に熱交換媒体流通
空間が形成された構成を有している。Conventional technology Double-tube heat exchangers generally have a radial gap between the inner and outer tubes made of aluminum that is partially blocked in the length direction, thereby creating a gap between the inner tube and the outer tube. It has a configuration in which a heat exchange medium circulation space is formed.
而して、従来、上記のような二重管式熱交換器は内外管
ともに銅製のものが用いられていたが、軽量性、低コス
ト等の面から最近では内外管をアルミニウム押出形材で
形成したアルミニウム製のものが開発されている。Traditionally, the double-tube heat exchanger as described above used copper for both the inner and outer tubes, but recently the inner and outer tubes are made of extruded aluminum for reasons such as light weight and low cost. Molded aluminum versions have been developed.
従来のこのようなアルミニウム製二重管式熱交換器を第
１４図に示す。同図において、（１０２）は外管、（１
０１）はこの外管内に同軸配置された径小の内管である
。内管（１０１）の両端部にはフレア加工により外管（
１０２）の内径にほぼ等しい外径の拡管部（１１１）が
形成され、この拡管部（１１１）において内外管の径方
向の隙間が閉塞されるとともに、長さ方向の中間部に亘
って内管と外管との間に熱交換媒体流通空間（１０３）
が形成されている。なお、同図に示す（１０４）は熱交
換媒体流通空間（１０３）に装填されたインナーフィン
、（１０Ｂ ）は熱交換媒体入口管、（１０７）は同出
口管である。FIG. 14 shows such a conventional aluminum double-tube heat exchanger. In the same figure, (102) is the outer tube, (1
01) is a small diameter inner tube coaxially arranged within this outer tube. Both ends of the inner tube (101) are flared to form an outer tube (
An enlarged tube part (111) having an outer diameter approximately equal to the inner diameter of the inner tube (102) is formed, and in this enlarged tube part (111), the gap in the radial direction between the inner and outer tubes is closed, and the inner tube is A heat exchange medium circulation space (103) between and the outer tube
is formed. In addition, (104) shown in the figure is an inner fin loaded in the heat exchange medium circulation space (103), (10B) is the heat exchange medium inlet pipe, and (107) is the same outlet pipe.
発明が解決しようとする課題
ところが、上記従来の熱交換器では、内管（１０１）と
外管（１０２）との接合は、拡管部（ｉｌｌ ）の端縁
における内管と外管との当接部周縁を外側からアルゴン
溶接（１０５）することにより行われているにすぎなか
ったため、強度に劣るという問題があった。また、アル
ゴン溶接は熱交換器ごとに個別に行わざるを得ず、作業
性が悪くひいては生産性が悪いという欠点もあった。Problem to be Solved by the Invention However, in the conventional heat exchanger described above, the inner tube (101) and the outer tube (102) are joined together by the contact between the inner tube and the outer tube at the edge of the expanded tube portion (ill). Since this was done by simply argon welding (105) the peripheral edge of the contact portion from the outside, there was a problem that the strength was poor. Furthermore, argon welding has to be performed individually for each heat exchanger, which has the disadvantage of poor workability and, ultimately, poor productivity.
この発明は、このような欠点を解消するためになされた
ものであって、強度、生産性に優れたアルミニウム製二
重管式熱交換器の提供を７目的とするものである。The present invention has been made in order to eliminate such drawbacks, and has seven objects to provide an aluminum double-tube heat exchanger having excellent strength and productivity.
課題を解決するための手段
上記目的を達成するために、この発明は、内外管の少な
くとも一方にろう材層を被覆して軸き、ろう付によって
内外管を接合しようというものである。Means for Solving the Problems In order to achieve the above objects, the present invention is directed to coating at least one of the inner and outer tubes with a brazing material layer, and joining the inner and outer tubes by brazing.
即ち、この発明は図面の符号を参照して示すと、アルミ
ニウムからなる内管（１）と外管（２）の径方向の隙間
が長さ方向の一部において閉塞されることにより、内管
（１）と外管（２）との間に熱交換媒体流通空間（３）
が形成されたアルミニウム製二重管式熱交換器において
、前記内管（１）の外面または外管（２）の内面の少な
くともいずれかに被覆形成されたろう材層（１２）
（２２）を介して、内管（１）と外管（２）が前記閉塞
部分にて一体にろう骨接合されてなることを特徴とする
。That is, as shown with reference to the reference numerals in the drawings, the present invention is characterized in that the radial gap between the inner tube (1) and the outer tube (2) made of aluminum is partially closed in the length direction, so that the inner tube Heat exchange medium circulation space (3) between (1) and outer tube (2)
A brazing material layer (12) coated on at least either the outer surface of the inner tube (1) or the inner surface of the outer tube (2).
(22) The inner tube (1) and the outer tube (2) are integrally brazed together at the closed portion.
作用
内管（１）と外管（２）とは内管外面又は外管内面の少
なくともいずれかに被覆されたろう材層を介してろう接
されているから、両管の接合面積を大きく確保でき強度
が向上する。また、部分的なアルゴン溶接が不用となり
、複数の熱交換器の同時ろう付が可能となるから、生産
性が良くなる。Since the working inner tube (1) and the outer tube (2) are brazed together via a brazing material layer coated on at least either the outer surface of the inner tube or the inner surface of the outer tube, a large joint area between the two tubes can be secured. Strength is improved. Further, since partial argon welding is no longer necessary and multiple heat exchangers can be brazed simultaneously, productivity is improved.
実施例
次に、この発明の実施例を第１図〜第１３図に基いて説
明する。なお実施例はこの発明を自動車用水冷オイルク
ーラーに適用した場合を示している。Embodiment Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 13. Note that the embodiment shows a case where the present invention is applied to a water-cooled oil cooler for an automobile.
第４図〜第７図において、（１）は相対的に径小となさ
れた内管、（２）は径大となされた外管であり、いずれ
もアルミニウム製である。In FIGS. 4 to 7, (1) is an inner tube with a relatively small diameter, and (2) is an outer tube with a relatively large diameter, both of which are made of aluminum.
内管（１）の両端にはフレア加工により外管内径にほぼ
等しい外径の拡管部（１３） （１３）が形成されて
いる。そして、内管（１）と外管（２）とはこれらが同
軸配置となされることにより、拡管部（１３）の外周面
が外管（２）の内周面に当接して内外管両者間の径方向
の隙間を閉塞するとともに、拡管部（１３）を除く両管
の長さ方向の中間部に熱交換媒体としての環状のオイル
流通空間（３）が形成され、この空間にアルミニウム製
のオフセットイン≠−フィン（４）が環状配置に装填さ
れている。前記内管（１）及び外管（２）は第１図、第
３図に示すように、いずれも心材（１１） （２１）
両面にろう材層（１２）（２２）が被覆形成されたもの
が用いられ、このろう材層（１２） （２２）を介し
て拡管部（１３）の外周面において第２図に示すように
内管（１）と外管（２）とがろう接一体化されている。Expanded tube portions (13) (13) having an outer diameter approximately equal to the inner diameter of the outer tube are formed at both ends of the inner tube (1) by flaring. The inner tube (1) and the outer tube (2) are arranged coaxially, so that the outer circumferential surface of the expanded tube portion (13) comes into contact with the inner circumferential surface of the outer tube (2), and both the inner and outer tubes are At the same time, an annular oil circulation space (3) as a heat exchange medium is formed in the middle part of both pipes in the longitudinal direction excluding the expanded pipe part (13). offset in≠-fins (4) are loaded in an annular arrangement. As shown in FIGS. 1 and 3, the inner tube (1) and the outer tube (2) are both made of core material (11) (21).
The brazing material layers (12) and (22) are coated on both sides, and the outer peripheral surface of the expanding tube section (13) is coated with the brazing material layers (12) and (22) as shown in FIG. The inner tube (1) and outer tube (2) are integrated by soldering.
かつインナーフィン（４）もまた内管（１）及び外管（
２）にろう接一体化されている。And the inner fin (4) also has an inner tube (1) and an outer tube (
2) is integrated with solder.
外管（２）の両端部近傍には入口管取付孔（５）及び出
口管取付孔（６）が穿設されるとともに、これら取付孔
にオイル入口管（７）と同出口管（８）が前記オイル流
通空間（３）に連通状態にろう接されている。An inlet pipe mounting hole (5) and an outlet pipe mounting hole (6) are bored near both ends of the outer pipe (2), and an oil inlet pipe (7) and an oil outlet pipe (8) are formed in these mounting holes. is brazed in communication with the oil circulation space (3).
ところで、この実施例では前記外管（２）は次のように
して製作されたものである。Incidentally, in this embodiment, the outer tube (2) was manufactured as follows.
即ち、まず第８図及び第９図に示すように、アルミニウ
ムからなる心材（２１）の両面にろう材層（２２）を被
覆形成した所定の大きさのプレージングシート（２３）
を用意する。ろう材層（２２）としては一般的にはＳｔ
含有量約６〜１３シｔ％程度のＡｌ２−５ｔ系合金が用
いられる。That is, as shown in FIGS. 8 and 9, a plating sheet (23) of a predetermined size is prepared by coating a brazing material layer (22) on both sides of a core material (21) made of aluminum.
Prepare. The brazing material layer (22) is generally St
An Al2-5t alloy having a content of about 6 to 13 sit% is used.
次に上記プレージングシート（２３）の幅方向の両側端
部を肉厚方向にハンマーないしはプレスで打撃する。こ
の打撃は一方の端部については下面において、他方の端
部については上面において行うことにより、第１Ｏ図に
示すように、一方の側端部については下縁から上縁に向
けて漸次肉薄となる傾斜面（２３ａ ）を形成せしめ、
また他方の側端部については上縁から下縁に向けて漸次
肉薄となる傾斜面（２８ｂ ）を形成せしめる。しかも
いずれの傾斜面にもろう材層（２２）が存在するものと
なる。プレージングシート（２８）の両側端部をこのよ
うに形成することで、第３図に示すように、両側縁を衝
き合わせ状となした際に、衝き合わせ部（２４）が重な
り状に合致してその当接面にろう材層、（２２）を介在
させることができ、その後のろう付により衝き合わせ部
（２４）の十分な接合を保証することができる。Next, both ends of the praising sheet (23) in the width direction are struck in the thickness direction with a hammer or a press. By performing this blow on the lower surface of one end and the upper surface of the other end, the thickness of one side end is gradually thinned from the lower edge to the upper edge, as shown in Figure 1O. forming an inclined surface (23a),
Further, at the other side end, an inclined surface (28b) is formed which becomes gradually thinner from the upper edge to the lower edge. Moreover, the brazing material layer (22) is present on both inclined surfaces. By forming both side ends of the praising sheet (28) in this way, when the both side edges are made into an abutting shape, the abutting portions (24) overlap in an overlapping manner, as shown in FIG. Accordingly, a brazing material layer (22) can be interposed on the contact surface, and sufficient bonding of the abutting portion (24) can be ensured by subsequent brazing.
次に、第１１図に示すように、プレージングシート（２
３）の幅方向の中央部を長さ方向に沿ってプレスにより
断面半円弧状に膨出成形して膨出部（２５）を形成する
。Next, as shown in FIG.
3) is bulged along the length direction by pressing into a semi-circular cross-sectional shape to form a bulged portion (25).
次に第１２図に示すように、膨出部（２５）に、オイル
入口管取付孔（５）と同出口管取付孔（６）を該膨出部
（２５）の長さ方向の両端部に穿設すると共に、必要に
応じてこれら取付孔の周端部をやや外方に突出させる。Next, as shown in FIG. 12, the oil inlet pipe attachment hole (5) and the oil outlet pipe attachment hole (6) are inserted into the bulge (25) at both longitudinal ends of the bulge (25). At the same time, if necessary, the peripheral ends of these mounting holes are made to protrude slightly outward.
この孔開けは、膨出部（２５）の形状に適合する形状の
当て型を下面側からあてがってプレスにより行ったもの
である。こうすることにより膨出部（２５）の圧潰や変
形の発生を防止でき、適正な位置に寸法精度の高い取付
孔を穿設することができる。もとより孔開けはミーリン
グ加工等により行っても良い。This hole was made by pressing a mold having a shape that matches the shape of the bulging portion (25) from below. By doing so, it is possible to prevent the bulge (25) from being crushed or deformed, and it is possible to drill a mounting hole with high dimensional accuracy at an appropriate position. Of course, the holes may be made by milling or the like.
続いて必要に応じて面打ちを行った後、プレージングシ
ート（２３）の膨出部（２５）を除く両側水平部（２６
）を、プレスにより第１３図に示すように断面Ｕ字状を
なすように成形した後、両側縁が衝き合わせ状となるよ
うにプレスにより外力を付与しながら丸パイプ形状に変
形して、所期する外管（２）を得る。こうして製作した
外管（２）は必要に応じて洗浄した後、製品組み立て工
程に送られ、その後ろう付されるものである。ここに衝
き合わせ部（２４）はろう何工程において必然的に接合
されるが、予め衝き合わせ部を電縫溶接して電縫管とし
て用いても良い。しかし、この実施例のようにろう何工
程において衝き合わせ部（２４）をろう接する方が電縫
溶接の工程を省略でき、ひいては熱交換器の製造工程を
簡略化できる点で好ましい。一方、内管（１）の製作は
、第１０図に示したと同様にプレージングシートの両端
を打撃してやはりろう材層が存在する状態の対応傾斜縁
としたのち、両側縁を衝き合わせてバイブ形状に成形し
たものである。なお、第３図及び第４図に示す（１４）
は内管の衝き合わせ部である。内管（１）はこの実施例
では両端がフレア加工されることから、プレージングシ
ートの衝き合わせ部（１４）は予め１４１溶接され電縫
管となされてフレア加工工程に送られる。Next, after performing surface punching as necessary, both horizontal parts (26) of the praising sheet (23) excluding the bulging part (25)
) is formed by a press into a U-shaped cross section as shown in Figure 13, and then deformed into a round pipe shape while applying an external force by a press so that both edges meet. The desired outer tube (2) is obtained. The outer tube (2) manufactured in this way is cleaned as necessary, then sent to a product assembly process, and then brazed. Although the abutting portion (24) is necessarily joined in the soldering process, the abutting portion may be electrically welded in advance and used as an electric resistance welded tube. However, it is preferable to braze the abutting portions (24) in the brazing process as in this embodiment because the electric resistance welding process can be omitted and the manufacturing process of the heat exchanger can be simplified. On the other hand, to manufacture the inner tube (1), as shown in Fig. 10, both ends of the plating sheet are struck to form corresponding sloped edges with the brazing metal layer present, and then both edges are brought together. It is molded into a vibrator shape. Note that (14) shown in Figures 3 and 4
is the butt part of the inner tube. Since both ends of the inner tube (1) are flared in this embodiment, the abutting portions (14) of the plating sheet are welded in advance at 141 to form an electric resistance welded tube and sent to the flaring process.
図示実施例の二重管式熱交換器の製作は、内管（１）の
両端をフレア加工して拡管部（１３）を形成するととも
に、内管（１）の外周にインナーフィン（４）を第４図
矢印（Ａ）で示す方向に湾曲させて配置し、これらを外
管（２）内に挿入し、かつ入口管取付孔（５）と出口管
取付孔（６）にオイル入口管（７）と同出口管（８）を
それぞれ配置して仮組固定し、その後一括ろう付を施し
て各構成部材をろう接一体化することにより行われたも
のである。かかるろう付後においては、内管（１）の拡
管部（１３）外周面と外管（２）の内周面との間、及び
外管（２）とインナーフィン（４）、内管（１）とイン
ナーフィン（４）との間に十分なフィレットが形成され
て、これらは強固に接合されたものとなる。また、外管
（２）はその製作段階でプレージングシート（２３）の
両側端部（２３ａ ）（２，３ｂ ’）を打撃して漸次
肉薄状態に圧潰しであるから、筒状成形後は第３図に示
すように衝き合わせ部（２４）が重なり状態に合致し、
かつ当接面相互間にろう材層が存在しているから、衝き
合わせ部（２４）の接合を一層確実かつ十分に保証でき
る。The double-tube heat exchanger of the illustrated embodiment is manufactured by flaring both ends of the inner tube (1) to form an enlarged tube portion (13), and at the same time attaching inner fins (4) to the outer periphery of the inner tube (1). are arranged in a curved manner in the direction shown by the arrow (A) in Figure 4, and inserted into the outer pipe (2), and the oil inlet pipe is inserted into the inlet pipe mounting hole (5) and the outlet pipe mounting hole (6). (7) and the outlet pipe (8) were respectively arranged and temporarily assembled and fixed, and then all the constituent members were brazed together to integrate them. After such brazing, there is a gap between the outer circumferential surface of the enlarged tube part (13) of the inner tube (1) and the inner circumferential surface of the outer tube (2), between the outer tube (2) and the inner fin (4), and between the inner tube ( A sufficient fillet is formed between 1) and the inner fin (4), so that they are firmly joined. In addition, since the outer tube (2) is crushed into a gradually thinner state by hitting both ends (23a) (2, 3b') of the praising sheet (23) at the manufacturing stage, after forming the outer tube into a cylindrical shape, As shown in FIG. 3, the abutting portions (24) meet the overlapping condition,
In addition, since the brazing material layer exists between the abutting surfaces, the joining of the abutting portions (24) can be guaranteed more reliably and sufficiently.
上記により製作された熱交換器は、自動車用ラジェータ
ーのタンク部等に組込まれて使用される。そして、入口
管（７）からオイル流通空間（３）に流入したオイルは
インナーフィン（４）を含むオイル流通空間（３）を流
通する過程で、外管（２）の周囲及び内管（１）内部を
流通する水と熱交換を行い、冷却されて出口管（８）か
ら器外へと流出する。The heat exchanger manufactured as described above is used by being incorporated into a tank portion of an automobile radiator. The oil flowing into the oil distribution space (3) from the inlet pipe (7) flows around the outer tube (2) and the inner tube (1) in the process of flowing through the oil distribution space (3) including the inner fins (4). ) It exchanges heat with the water flowing inside, is cooled, and flows out of the vessel from the outlet pipe (8).
なお、以上の実施例では内管（１）、外管（２）はとも
にその両面にろう材層を被覆したものを示したが、ろう
材層は内管（１）の外面、外管（２）の内面の少なくと
もいずれかに存在すれば足りる。また、内管（１）と外
管（２）のみでなく、インナーフィン（４）も内外管に
ろう接一体化されている場合を示したが、インナーフィ
ンのろう接は要件ではない。しかし、インナーフィン（
４）と内外管（１）（２）とがろう接されている方が、
より破壊強度を向上しえ、また伝熱効率も向上しうる点
で望ましい。In the above embodiments, both the inner tube (1) and the outer tube (2) were coated with a brazing material layer on both sides, but the brazing material layer was applied to the outer surface of the inner tube (1) and the outer tube (2). It is sufficient if it exists in at least one of the inner surfaces of 2). Further, although not only the inner tube (1) and the outer tube (2) but also the inner fin (4) are integrated with the inner and outer tubes by brazing, soldering of the inner fin is not a requirement. However, the inner fin (
4) and the inner and outer tubes (1) and (2) are brazed together,
This is desirable because it can further improve fracture strength and heat transfer efficiency.
発明の詳細
な説明したように、この発明は、アルミニウムからなる
内管と外管の隙間が長さ方向の一部において閉塞される
ことにより、内管と外管との間に熱交換媒体流通空間が
形成されたアルミニウム製二重管式熱交換器において、
前記内管の外面または外管の内面の少なくともいずれか
に被覆形成されたろう材層を介して、内管と外管が前記
閉塞部分にて一体にろう骨接合されてなることを特徴と
するものであるから、内外管の広範囲に亘る接合を確保
でき、このため破壊圧力を向上でき強度に優れた耐久性
に富む熱交換器となしうる。しかも内管の外面または外
管の内面に被覆されたろう材層を介して内外管が接合さ
れたものであるから、複数の熱交換器のろう接作業を同
時的に遂行することができ、接合作業効率を向上しえひ
いては生産効率を向上しうる。As described in detail, the present invention is characterized in that the gap between the inner tube and the outer tube made of aluminum is partially closed in the longitudinal direction, so that a heat exchange medium can flow between the inner tube and the outer tube. In an aluminum double-tube heat exchanger with a space formed,
The inner tube and the outer tube are integrally brazed together at the closed portion via a brazing material layer coated on at least either the outer surface of the inner tube or the inner surface of the outer tube. Therefore, the joint between the inner and outer tubes can be ensured over a wide range, and therefore the bursting pressure can be improved, and a heat exchanger with excellent strength and durability can be obtained. Moreover, since the inner and outer tubes are joined via a brazing material layer coated on the outer surface of the inner tube or the inner surface of the outer tube, it is possible to perform the brazing work on multiple heat exchangers simultaneously. Work efficiency can be improved, and production efficiency can also be improved.
第１図はこの発明の一実施例に係るオイルクーラー用熱
交換器の縦断面拡大図、第２図は同じく端部近傍の縦断
面拡大図、第３図は第５図における■−■線断面図、第
４図は内管と外管とインナーフィンを分離して示す斜視
図、第５図は一部を断面で示す熱交換器の正面図、第６
図は熱交換器の平面図、第７図はオイル入口管側から見
た熱交換器の側面図、第８図は外管構成用のプレージン
グシートの斜視図、Ｗ＆９図は第８図の■−■線断面図
、第１０図はプレージングシートの両側端部を打撃した
後の断面図、第１１図はプレージングシートへの膨出部
形成後の斜視図、第１２図はオイル出入口管取付孔の穿
孔後の斜視図、第１３図は断面Ｕ字状に成形した後の斜
視図、第１４図は従来のアルミニウム製二重管式熱交換
器の縦断面図である。
（１）・・・内管、（２）・・・外管、（３）・・・熱
交換媒体（オイル）流通空間、（４）・・・インナーフ
ィン、（１１） （２１）・・・心材、（１２）
（２２）・・・ろう材層、（２３）・・・プレージング
シート。FIG. 1 is an enlarged vertical cross-sectional view of a heat exchanger for an oil cooler according to an embodiment of the present invention, FIG. 2 is an enlarged vertical cross-sectional view of the vicinity of the end, and FIG. 3 is a line ■-■ in FIG. 5. 4 is a perspective view showing the inner tube, outer tube, and inner fin separated, FIG. 5 is a front view of the heat exchanger partially shown in cross section, and FIG. 6 is a sectional view.
The figure is a plan view of the heat exchanger, Figure 7 is a side view of the heat exchanger seen from the oil inlet pipe side, Figure 8 is a perspective view of the plating sheet for the outer tube configuration, and Figures W & 9 are the same as Figure 8. ■-■ line sectional view, Figure 10 is a cross-sectional view after hitting both ends of the praising sheet, Figure 11 is a perspective view after forming a bulge on the praising sheet, and Figure 12 is the oil inlet/outlet. FIG. 13 is a perspective view after forming the pipe attachment holes into a U-shaped cross section, and FIG. 14 is a longitudinal cross-sectional view of a conventional aluminum double-tube heat exchanger. (1) Inner tube, (2) Outer tube, (3) Heat exchange medium (oil) circulation space, (4) Inner fin, (11) (21)・Heartwood, (12)
(22)... Brazing metal layer, (23)... Placing sheet.
Claims (1)
の隙間が長さ方向の一部において閉塞されることにより
、内管（１）と外管（２）との間に熱交換媒体流通空間
（３）が形成されたアルミニウム製二重管式熱交換器に
おいて、前記内管（１）の外面または外管（２）の内面
の少なくともいずれかに被覆形成されたろう材層（１２
）（２２）を介して、内管（１）と外管（２）が前記閉
塞部分にて一体にろう付接合されてなることを特徴とす
るアルミニウム製二重管式熱交換器。The radial gap between the aluminum inner tube (1) and outer tube (2) is partially closed in the length direction, allowing heat exchange between the inner tube (1) and the outer tube (2). In an aluminum double-tube heat exchanger in which a medium circulation space (3) is formed, a brazing material layer (12) coated on at least either the outer surface of the inner tube (1) or the inner surface of the outer tube (2).
) (22) An aluminum double-tube heat exchanger characterized in that the inner tube (1) and the outer tube (2) are integrally brazed together at the closed portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1131845A JPH0814467B2 (en) | 1989-05-25 | 1989-05-25 | Method for manufacturing aluminum double tube heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1131845A JPH0814467B2 (en) | 1989-05-25 | 1989-05-25 | Method for manufacturing aluminum double tube heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02309192A true JPH02309192A (en) | 1990-12-25 |
| JPH0814467B2 JPH0814467B2 (en) | 1996-02-14 |
Family
ID=15067450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1131845A Expired - Fee Related JPH0814467B2 (en) | 1989-05-25 | 1989-05-25 | Method for manufacturing aluminum double tube heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0814467B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6391489A (en) * | 1986-10-03 | 1988-04-22 | Nippon Denso Co Ltd | Heat exchanger |
-
1989
- 1989-05-25 JP JP1131845A patent/JPH0814467B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6391489A (en) * | 1986-10-03 | 1988-04-22 | Nippon Denso Co Ltd | Heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0814467B2 (en) | 1996-02-14 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |