JP3207317B2 - Aluminum alloy heat exchanger - Google Patents

Description

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

【０００１】[0001]

【産業上の利用分野】この発明は、自動車用空調機のエ
バポレータ等として使用されるアルミニウム合金製熱交
換器の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an aluminum alloy heat exchanger used as an evaporator of an air conditioner for a vehicle.

【０００２】[0002]

【従来の技術】空気調和装置に組み込まれて、内部で冷
媒を蒸発させ、外部を流通する空気を冷却するエバポレ
ータとして、図７に示す様な構造のアルミニウム合金製
熱交換器が、例えば特開平２−１６９１２７号公報に示
されている様に、従来から知られている。2. Description of the Related Art As an evaporator incorporated in an air conditioner to evaporate a refrigerant inside and cool air flowing outside, an aluminum alloy heat exchanger having a structure as shown in FIG. As shown in 2-169127, it is conventionally known.

【０００３】この従来のアルミニウム合金製熱交換器
は、一端縁に互いに間隔をあけて１対の突出部１ａ、１
ｂを形成した金属板２、２の片面にＵ字形の凹部３を、
この凹部３の両端を上記１対の突出部１ａ、１ｂの端縁
にまで連続させた状態で形成している。上記凹部３の内
側には多数の突起４、４を形成し、凹部３により構成さ
れる、伝熱管相当部である、折り返し流路５の内側を流
れる冷媒等の流体の流れを乱し、この流体と金属板２と
の間の熱交換が効率良く行なわれる様にしている。In this conventional aluminum alloy heat exchanger, a pair of protrusions 1a, 1
A U-shaped recess 3 is formed on one side of the metal plates 2 and 2 on which the b is formed.
Both ends of the recess 3 are formed so as to be continuous with the ends of the pair of protrusions 1a and 1b. A large number of protrusions 4 are formed inside the concave portion 3 to disturb the flow of a fluid such as a refrigerant flowing inside the return flow path 5 which is a heat transfer tube equivalent portion formed by the concave portion 3. The heat exchange between the fluid and the metal plate 2 is performed efficiently.

【０００４】上述の様な金属板２、２は、２枚１組と
し、互いの凹部３同士を対向させた状態で最中状に重ね
合わせて互いに液密に接合する事により、Ｕ字形の折り
返し流路５と、この折り返し流路５の両端に位置して端
縁部から突出した１対の接合部６ａ、６ｂとを有する素
子７とする。この際上記各突起４、４は、互いに突き合
わせろう付けされて、両金属板２、２同士のろう付け強
度を向上させる。The above-mentioned metal plates 2, 2 are formed as a set of two sheets, and are superposed in the middle while the concave portions 3 thereof are opposed to each other, and are joined in a liquid-tight manner to form a U-shape. The element 7 has the folded flow path 5 and a pair of joints 6a and 6b located at both ends of the folded flow path 5 and protruding from the edge. At this time, the projections 4, 4 are brazed against each other to improve the brazing strength between the two metal plates 2, 2.

【０００５】そして、複数の素子７のそれぞれの接合部
６ａ、６ｂを、１対の（図７には１個のみ示す）タンク
８の側面にそれぞれ形成した、スリット状の接合孔９、
９に挿入すると共に、各接合部６ａ、６ｂの外周面と各
接合孔９、９の内周縁とを互いに液密にろう付け接合す
る。タンク８は、座板１０とタンク本体１１とを最中状
に組み合わせ、互いに液密にろう付けする事で構成され
ており、上記接合孔９、９は、座板１０の底面に形成さ
れている。これと共に、隣り合う素子７の間にコルゲー
ト型のフィン（図示せず）を設け、各素子７の外側面と
これらフィンとをろう付けする。[0005] Slit-shaped bonding holes 9 are formed on the side surfaces of a pair of tanks 8 (only one is shown in FIG. 7 ).
9, and the outer peripheral surfaces of the joints 6a, 6b and the inner peripheral edges of the joint holes 9, 9 are brazed to each other in a liquid-tight manner. The tank 8 is formed by combining the seat plate 10 and the tank body 11 in the middle and brazing them in a liquid-tight manner with each other. The joining holes 9 are formed on the bottom surface of the seat plate 10. I have. At the same time, corrugated fins (not shown) are provided between the adjacent elements 7, and the outer surfaces of the respective elements 7 and these fins are brazed.

【０００６】上記１対のタンク８のうち、一方のタンク
８の内側は、中間部に固定した隔壁１２により仕切る事
で、入口室１３と出口室１４とに分割し、入口室１３の
側に流体給排口である流入口１５（次述する図９〜１１
参照）を、出口室１４の側に別の流体給排口である流出
口１６を、それぞれ設けている。The inside of one of the pair of tanks 8 is partitioned by a partition wall 12 fixed to an intermediate portion into an inlet chamber 13 and an outlet chamber 14. Inflow port 15 serving as a fluid supply / discharge port (see FIGS. 9 to 11 described below)
And an outlet 16 which is another fluid supply / discharge port on the side of the outlet chamber 14.

【０００７】上述の様に構成されるアルミニウム合金製
熱交換器の場合、流入口１５から冷媒等の流体を送り込
むと、この流体は、入口室１３から一部の素子７の折り
返し流路５を通って別のタンク内に入り、この別のタン
クから残りの素子７の折り返し流路５内を通って上記一
方のタンク８の出口室１４に達し、次いで流出口１６か
ら流出する。In the case of the heat exchanger made of aluminum alloy having the above-described structure, when a fluid such as a refrigerant is fed from the inlet 15, the fluid flows from the inlet chamber 13 to the return channel 5 of some of the elements 7. Then, it passes into another tank, passes through the folded channel 5 of the remaining element 7 to reach the outlet chamber 14 of the one tank 8, and then flows out from the outlet 16.

【０００８】ところで、前記流入口１５及び流出口１６
には、図８、１０、１１に示す様に、流体給排管である
流入管１７又は流出管１８を接続して、これら流入口１
５及び流出口１６に、冷媒等の流体を移送する為の配管
の端部を接続自在としている。この様に、流入口１５及
び流出口１６に流入管１７又は流出管１８を接続するの
は、非円形（主として長円形）の流入口１５及び流出口
１６に、断面円形の配管の端部を接続する為である。Incidentally, the inflow port 15 and the outflow port 16
As shown in FIGS. 8 , 10 and 11 , an inflow pipe 17 or an outflow pipe 18 which is a fluid supply / discharge pipe is connected to these
An end of a pipe for transferring a fluid such as a refrigerant can be freely connected to the outlet 5 and the outlet 16. As described above, the connection of the inflow pipe 17 or the outflow pipe 18 to the inflow port 15 and the outflow port 16 is achieved by connecting the end of the pipe having a circular cross section to the non-circular (mainly oval) inflow port 15 and outflow port 16. To connect.

【０００９】即ち、これら流入口１５及び流出口１６
は、図９〜１０に示す様に、上記タンク本体１１をプレ
ス成形する際に同時に成形するが、このタンク本体１１
の高さ寸法は限られている。一方、冷媒等の流体の流量
を確保する為、これら流入口１５及び流出口１６の断面
積を或る程度確保する必要がある。この為、これら流入
口１５及び流出口１６は、上記タンク本体１１の長さ方
向を長軸とする楕円形若しくは長円形とする。ところ
が、エバポレータ等として使用されるアルミニウム合金
製熱交換器と、コンプレッサやコンデンサ等の他の機器
とを接続する為の配管は、一般的な断面形状が円形のも
のを使用する。この為、上記流入管１７及び流出管１８
により、断面が非円形の流入口１５及び流出口１６と断
面が円形の配管とを接続自在としている。従って、これ
ら流入管１７及び流出管１８は、流入口１５及び流出口
１６に接続する内端部の断面形状が非円形で、配管を接
続すべき外端部の断面形状が円形である。That is, the inflow port 15 and the outflow port 16
As shown in FIGS. 9 to 10 , the tank body 11 is formed at the same time when the tank body 11 is press-formed.
Has a limited height dimension. On the other hand, in order to secure a flow rate of a fluid such as a refrigerant, it is necessary to secure a certain cross-sectional area of the inflow port 15 and the outflow port 16. For this reason, the inflow port 15 and the outflow port 16 have an elliptical shape or an oval shape whose major axis is the length direction of the tank body 11. However, pipes for connecting an aluminum alloy heat exchanger used as an evaporator or the like and other devices such as a compressor or a condenser have a general circular cross section. For this reason, the inflow pipe 17 and the outflow pipe 18
Thereby, the inflow port 15 and the outflow port 16 each having a non-circular cross section can be freely connected to a pipe having a circular cross section. Accordingly, the inflow pipe 17 and the outflow pipe 18 have a non-circular cross-sectional shape at the inner end connected to the inflow port 15 and the outflow port 16, and a cross-sectional shape at the outer end to which the pipe is connected.

【００１０】上述の様な流入管１７及び流出管１８は、
図１０に示す様に、それぞれの内端部を上記流入口１５
及び流出口１６に挿入し、これら各管１７、１８の外周
面と各口１５、１６の内周面とを液密にろう付けしてい
る。尚、上記タンク本体１１を構成するアルミニウム合
金製板材と上記各管１７、１８を構成するアルミニウム
合金製板材との一方又は双方を、片面又は両面にろう材
（Siを多く含むアルミニウム合金）を積層した、所謂ク
ラッド材としている。このろう材は、ろう付けの為の加
熱によって溶融し、上記両周面同士を互いにろう付けす
る。ろう付け時には、アルミニウム合金製熱交換器の構
成各部品を仮組み付けした状態のまま、図示しない治具
で抑え付け、図７〜８に示す様にタンク本体１１を下に
した状態で、加熱炉中で加熱する。The inflow pipe 17 and the outflow pipe 18 as described above are
As shown in FIG. 10 , each inner end is connected to the inlet 15
And the outer peripheral surfaces of the tubes 17 and 18 and the inner peripheral surfaces of the ports 15 and 16 are brazed in a liquid-tight manner. One or both of the aluminum alloy plate material constituting the tank body 11 and the aluminum alloy plate material constituting each of the pipes 17 and 18 are laminated with a brazing material (aluminum alloy containing a large amount of Si) on one or both surfaces. It is a so-called clad material. This brazing material is melted by heating for brazing, and the above-mentioned peripheral surfaces are brazed to each other. At the time of brazing, the components of the aluminum alloy heat exchanger were temporarily assembled and held down with a jig (not shown), and the heating furnace was placed with the tank body 11 down as shown in FIGS. Heat in.

【００１１】上記各口１５、１６と各管１７、１８とは
上述の様にろう付けされるが、ろう付け時には上記ろう
材を溶融させるべく、上記各部材は高温（凡そ６００
℃）に曝される。この結果、これら各部材は、溶融しな
いにしても軟化する事が避けられず、上記各口１５、１
６による上記各管１７、１８の支持強度が低下する。特
に、これら各口１５、１６が各管１７、１８の内端部上
面（図８の左端面上面）を抑え付ける部分の長さ寸法は
小さく、この部分が上記各管１７、１８を抑え付ける力
は弱い。従って、これら各管１７、１８は、図８で時計
方向に回動し易い。この結果、上記各管１７、１８の外
端部が重力の影響で下方に変位し易くなる。そして、変
位した状態では、上記両管１７、１８中心位置同士の間
にずれδ（図１１）が生じる。そして、この様なずれδ
に基づいて、これら両管１７、１８の先端位置や、これ
ら両管１７、１８同士の間隔が設計値からずれる。そし
て、これら両管１７、１８の外端部と配管の一端部とを
接続しにくくなったり、接続できた場合でも、上記配管
の他端部位置が設計位置からずれてしまう。The ports 15 and 16 and the pipes 17 and 18 are brazed as described above. At the time of brazing, the members are heated to a high temperature (approximately 600
° C). As a result, these members are inevitably softened even if they are not melted.
6, the supporting strength of each of the tubes 17 and 18 is reduced. In particular, the length of the portion where each of the ports 15 and 16 suppresses the upper surface of the inner end portion (the upper surface of the left end surface in FIG. 8 ) of each of the tubes 17 and 18 is small, and this portion suppresses each of the tubes 17 and 18. Power is weak. Therefore, these tubes 17 and 18 are easy to rotate clockwise in FIG . As a result, the outer ends of the tubes 17 and 18 are easily displaced downward by the influence of gravity. Then, in the displaced state, a deviation δ ( FIG. 11 ) occurs between the center positions of the tubes 17 and 18. And such a shift δ
, The tip positions of the two tubes 17 and 18 and the distance between the two tubes 17 and 18 deviate from the design values. Then, it becomes difficult to connect the outer ends of these two pipes 17 and 18 to one end of the pipe, or even if they can be connected, the position of the other end of the pipe deviates from the design position.

【００１２】即ち、上記各管１７、１８の外端部に接続
する配管は、例えばアルミニウム合金製熱交換器がエバ
ポレータである場合には、図１２〜１３に示す様に構成
されている。即ち、流入管１７に接続すべき比較的大径
の配管１９と流出管１８に接続すべき比較的小径の配管
２０とをブラケット２１で束ねて、これら両配管１９、
２０を一体に取り扱える様にしている。これら両配管１
９、２０の曲げ剛性は相当に大きい為、これら両配管１
９、２０の基端部を上記各管１７、１８に接続した状態
では、これら両配管１９、２０の先端部位置も必然的に
定まってしまう。又、この様にブラケット２１により両
配管１９、２０を束ねた状態では、これら両配管１９、
２０の接続端部のピッチＰは、殆ど（０．５mm程度し
か）調節できない。That is, the pipes connected to the outer ends of the pipes 17 and 18 are configured as shown in FIGS. 12 and 13 , for example, when the aluminum alloy heat exchanger is an evaporator. That is, a relatively large-diameter pipe 19 to be connected to the inflow pipe 17 and a relatively small-diameter pipe 20 to be connected to the outflow pipe 18 are bundled by the bracket 21, and these two pipes 19,
20 can be handled together. These two pipes 1
Since the bending stiffness of the pipes 9 and 20 is considerably large, these two pipes 1
In a state where the base ends of the pipes 9 and 20 are connected to the pipes 17 and 18, the positions of the front ends of the pipes 19 and 20 are necessarily determined. In a state where the two pipes 19 and 20 are bundled by the bracket 21 in this manner, the two pipes 19 and 20 are bundled.
The pitch P of the 20 connection ends can be adjusted almost (only about 0.5 mm).

【００１３】この為、上述の様に流入管１７の中心と流
出管１８の中心との間にずれδが生じると、上記両配管
１９、２０の先端部位置が設計値から外れ、この先端部
と別の配管との接続作業を行いにくくなったり、著しい
場合には接続できなくなってしまう。又、上記ずれδが
大きく、この結果、上記流入管１７の中心と流出管１８
の中心とのピッチが設計値からずれると、これら両管１
７、１８と上記両配管１９、２０の端部とを接続できな
くなってしまう。無理に接続しようと、上記両配管１
９、２０を曲げ変形させると、これら両配管１９、２０
の弾性に基づいて、上記両管１７、１８と前記両口１
５、１６とのろう付け部に過大な応力が加わり、このろ
う付け部が早期に破損する原因となる。For this reason, if the deviation δ occurs between the center of the inflow pipe 17 and the center of the outflow pipe 18 as described above, the positions of the tips of the two pipes 19 and 20 deviate from the design values, and It becomes difficult to perform the connection work with another pipe, or in a severe case, the connection becomes impossible. Also, the deviation δ is large, and as a result, the center of the inflow pipe 17 and the outflow pipe 18
When the pitch with the center deviates from the design value, these two pipes 1
It becomes impossible to connect the ends of the pipes 19 and 20 with the ends 7 and 18. If you try to connect forcibly,
When the pipes 9 and 20 are bent and deformed, these pipes 19 and 20 are bent.
Based on the elasticity of the two pipes 17, 18 and the two ports 1
Excessive stress is applied to the brazing portions 5 and 16, and this brazing portion may be damaged at an early stage.

【００１４】この為従来から、図１４に示す様に、流入
管１７（及び流出管１８）を流入口１５（又は流出口１
６）に挿入後、ろう付けの為の加熱前に、この流入管１
７（及び流出管１８）の外周面と流入口１５（又は流出
口１６）外端縁とを点付け溶接していた。この様に点付
け溶接を行なう事により、流入口１５（又は流出口１
６）に対して流入管１７（又は流出管１８）が変位しに
くくなって、前記両管１７、１８の中心同士の間にずれ
が生じなくなる。Therefore, conventionally, as shown in FIG. 14 , the inflow pipe 17 (and the outflow pipe 18) is connected to the inflow port 15 (or the outflow port 1).
After insertion in 6) and before heating for brazing,
7 (and the outlet pipe 18) and the outer edge of the inlet 15 (or outlet 16) were spot-welded. By performing spot welding in this manner, the inlet 15 (or the outlet 1) is formed.
With respect to 6), the inflow pipe 17 (or the outflow pipe 18) is less likely to be displaced, so that the center between the two pipes 17 and 18 does not shift.

【００１５】又、実開平４−１２２９７９号公報には、
図１５〜１８に示す様な構造により、流入口１５（又は
流出口１６）に対する流入管１７（又は流出管１８）の
取付位置を規制する発明が記載されている。先ず、図１
５に示した構造の場合には、流入管１７（又は流出管１
８）の端部外周面の２個所位置に係止凹部２２を形成し
ている。そして、この流入管１７の端部を流入口１５内
に挿入した後、この流入口１５の端部で上記係止凹部２
２に整合する部分を内向にかしめ付け、係止凸部２３、
２３を形成する。尚、図１５に於いては、説明の為、流
入管１７挿入以前の流入口１５に、係止凸部２３、２３
を形成している。In Japanese Utility Model Laid-Open No. 4-122797,
An invention is described in which the structure as shown in FIGS. 15 to 18 regulates the attachment position of the inflow pipe 17 (or outflow pipe 18) to the inflow port 15 (or outflow port 16). First, FIG.
In the case of the structure shown in FIG. 5 , the inflow pipe 17 (or the outflow pipe 1) is used.
8), locking recesses 22 are formed at two positions on the outer peripheral surface of the end. Then, after the end of the inflow pipe 17 is inserted into the inflow port 15, the end of the inflow port 15 is used to hold the locking recess 2.
2 and crimped inward, and the locking projections 23,
23 are formed. In FIG. 15 , for the sake of explanation, locking protrusions 23, 23 are inserted into the inflow port 15 before the inflow pipe 17 is inserted.
Is formed.

【００１６】図１５に示した構造の場合には、上述の様
に、流入管１７端部外周面の係止凹部２２に向け流入口
１５の端部外周面２個所位置をかしめ付けて係止凸部２
３、２３としている。これら係止凹部２２と係止凸部２
３、２３との係合により、流入口１５と流入管１７との
間に点付け溶接等を施さなくても、上記流入管１７が流
入口１５内にしっかりと支持できる。In the case of the structure shown in FIG . 15 , as described above, the two positions of the outer peripheral surface of the end of the inflow port 15 are caulked toward the engaging recess 22 of the outer peripheral surface of the end of the inflow pipe 17, and are locked. Convex part 2
3, 23. These locking concave portion 22 and locking convex portion 2
By the engagement with 3, 23, the inflow pipe 17 can be securely supported in the inflow port 15 without performing spot welding or the like between the inflow port 15 and the inflow pipe 17.

【００１７】又、図１６に示した構造の場合には、上記
係止凸部２３、２３を形成する方法に加え、流入管１７
の端部外周面に係止突起２４、２４を形成し、この係止
突起２４、２４を流入口１５の開口端縁に衝合自在とし
て、流入口１５内への流入管１７の挿入量の規制を容易
且つ確実に行なえる様にしている。In the case of the structure shown in FIG. 16 , in addition to the method of forming the locking projections 23, 23,
The protrusions 24, 24 are formed on the outer peripheral surface of the end of the inflow pipe 15 so that the protrusions 24, 24 can be brought into contact with the opening edge of the inflow port 15 so that the insertion amount of the inflow pipe 17 into the inflow port 15 can be reduced. Regulations are made easy and reliable.

【００１８】更に、図１７〜１８に示した構造の場合に
は、流入口１５の端縁部に係止舌片２５、２５を突出形
成すると共に、上記流入管１７の端部外周面の２個所位
置に係止凹部２６、２６を形成し、この係止凹部２６、
２６に向けて上記係止舌片２５、２５をかしめ付ける構
造としている。Further, in the case of the structure shown in FIGS. 17 and 18 , the locking tongue pieces 25, 25 are formed so as to protrude from the edge of the inflow port 15 and the outer peripheral surface of the end portion of the inflow pipe 17 is formed. Locking recesses 26, 26 are formed at the locations, and the locking recesses 26, 26 are formed.
The structure is such that the locking tongue pieces 25, 25 are swaged toward.

【００１９】[0019]

【発明が解決しようとする課題】ところが、上述の様な
従来構造の場合、何れの構造の場合も、ろう付けの為の
加熱に伴って流入管１７の中心と流出管１８の中心との
間にずれδが生じるのを防止する為に余分な工程が必要
になり、この工程がアルミニウム合金製熱交換器の製作
費を高くする原因となっている。即ち、However, in the case of the conventional structures as described above, in each case, the center between the center of the inflow pipe 17 and the center of the outflow pipe 18 is caused by heating for brazing. An extra step is required to prevent the occurrence of the deviation δ, and this step increases the manufacturing cost of the aluminum alloy heat exchanger. That is,

【００２０】 図１４に示した構造の場合には、流入
口１５に流入管１７を、流出口１６に流出管１８を、そ
れぞれ挿入した後、互いに嵌合した部材同士を点付け溶
接する工程が必要になり、 図１５〜１６に示した構
造の場合には、流入口１５に流入管１７を、流出口１６
に流出管１８を、それぞれ挿入した後、流入口１５及び
流出口１６に係止凸部２３、２３を形成する工程が必要
になり、 図１７〜１８に示した構造の場合には、流
入口１５に流入管１７を、流出口１６に流出管１８を、
それぞれ挿入した後、係止凹部２６、２６内に係止舌片
２５、２５を折り曲げる工程が必要になる。In the case of the structure shown in FIG . 14 , a step of inserting the inflow pipe 17 into the inflow port 15 and inserting the outflow pipe 18 into the outflow port 16 and then spot welding the members fitted to each other is performed. 15 and 16 , in the case of the structure shown in FIGS.
After the outflow pipes 18 are respectively inserted into the holes, a step of forming the locking projections 23 at the inflow port 15 and the outflow port 16 is required . In the case of the structure shown in FIGS. 15, an outlet pipe 17, an outlet 16 an outlet pipe 18,
After each insertion, a step of bending the locking tongue pieces 25, 25 into the locking recesses 26, 26 is required.

【００２１】本発明のアルミニウム合金製熱交換器は、
上記〜に記載した様な余分な工程を不要にし、製作
費の低廉化を図るべく、発明したものである。The heat exchanger made of aluminum alloy of the present invention comprises:
The present invention has been made in order to eliminate the extra steps as described in (1) to (4) above and to reduce the manufacturing cost.

【００２２】[0022]

【課題を解決する為の手段】本発明のアルミニウム合金
製熱交換器は何れも、前述した従来のアルミニウム合金
製熱交換器と同様に、それぞれがアルミニウム合金によ
り造られた多数の伝熱管相当部とフィンとから成るコア
部と、このコア部の端部に設けられた、アルミニウム合
金製のタンクと、このタンクの側面に設けられた筒状の
流体給排口と、この流体給排口に挿入した状態でこの流
体給排口にろう付け接合された、アルミニウム合金製の
流体給排管とを備えている。The aluminum alloy heat exchanger of the present invention has a large number of heat transfer tube equivalent parts each made of an aluminum alloy, similarly to the above-mentioned conventional aluminum alloy heat exchanger. A fin, a core portion, an aluminum alloy tank provided at an end of the core portion, a cylindrical fluid supply / discharge port provided on a side surface of the tank, and a fluid supply / discharge port. And a fluid supply / discharge pipe made of an aluminum alloy and brazed to the fluid supply / discharge port in an inserted state.

【００２３】特に、請求項１に記載したアルミニウム合
金製熱交換器に於いては、上記流体給排口の一部でろう
付け時に下面となる部分に形成された、タンク内側が開
口したコ字形の切れ目により三方を囲まれる部分を上記
流体給排口の内周面から上方に突出する方向にＬ字形に
曲げ起こす事により形成され、上記内周面とほぼ平行な
抑え板部を有する鉤部と、この抑え板部の片側面と上記
流体給排口の内周面とで構成され、上記流体給排管の端
縁部をがたつきなく挿入自在な係止溝状部とを備えてい
る。そして、この係止溝状部に上記流体給排管の端縁部
を挿入した状態で、この流体給排管の端部外周面と上記
流体給排口の内周面とがろう付けされている。In particular, in the heat exchanger made of aluminum alloy according to the first aspect, a U-shape formed in a part of the fluid supply / discharge port which becomes a lower surface during brazing and which has an open tank inner side. A hook portion formed by bending a portion surrounded on three sides by a notch in an L-shape in a direction protruding upward from the inner peripheral surface of the fluid supply / drain port, and having a holding plate portion substantially parallel to the inner peripheral surface. And a locking groove formed by one side surface of the pressing plate portion and the inner peripheral surface of the fluid supply / discharge port, and capable of inserting an end edge of the fluid supply / discharge tube without looseness. I have. Then, in a state where the edge of the fluid supply / discharge pipe is inserted into the locking groove-shaped portion, the outer peripheral face of the end of the fluid supply / discharge pipe and the inner peripheral face of the fluid supply / discharge port are brazed. I have.

【００２４】又、請求項２に記載したアルミニウム合金
製熱交換器に於いては、上記流体給排口は上記タンクの
外側に突出する状態で設けられており、上記流体給排管
の中間部でろう付け時に下面となる部分の外周面に、こ
の流体給排管の外端側が開口したコ字形若しくはＵ字形
の切れ目の内側を上記外周面から下方に突出する方向に
折り立てる事により形成された折り立て板部を備えてい
る。そして、この折り立て板部の片側面と上記流体給排
口の端縁とを当接させた状態で、この流体給排管の端部
外周面と上記流体給排口の内周面とがろう付けされてい
る。In the aluminum alloy heat exchanger according to the present invention, the fluid supply / discharge port is provided in the tank.
A U-shaped or U-shaped cut in which the outer end side of the fluid supply / discharge pipe is opened on the outer peripheral surface of a portion which becomes a lower surface at the time of brazing at the intermediate portion of the fluid supply / discharge pipe is provided so as to protrude outward. Is provided with a folded-up plate portion formed by folding the inside of the inside in a direction protruding downward from the outer peripheral surface. Then, in a state where one side surface of the folded plate portion and the edge of the fluid supply / discharge port are in contact with each other, the outer peripheral surface of the end of the fluid supply / discharge pipe and the inner peripheral surface of the fluid supply / discharge port are formed. Be brazed.

【００２５】[0025]

【００２６】[0026]

【作用】上述の様に構成される本発明のアルミニウム合
金製熱交換器は何れも、面倒な工程を要する事なく、ろ
う付けの為の加熱に伴って流体給排口と流体給排管との
位置関係がずれる事を防止できる。The aluminum alloy heat exchanger of the present invention constructed as described above does not require any troublesome steps, and is provided with a fluid supply / discharge port and a fluid supply / discharge pipe with heating for brazing. Can be prevented from shifting.

【００２７】即ち、請求項１に記載したアルミニウム合
金製熱交換器の場合には、ろう付けの為の加熱に伴って
上記流体給排口が軟化しても、流体給排管の端縁部と係
止溝状部との係合に基づき、この流体給排管が垂れ下が
り方向に変位する事がなくなる。従って、ろう付けの為
の加熱に伴って流体給排口と流体給排管との位置関係が
ずれる事がなくなる。That is, in the case of the heat exchanger made of aluminum alloy according to the first aspect, even if the fluid supply / discharge port is softened due to heating for brazing, the end portion of the fluid supply / discharge pipe is provided. The fluid supply / drain pipe is not displaced in the hanging direction due to the engagement between the fluid supply / drain pipe and the locking groove. Therefore, the positional relationship between the fluid supply / discharge port and the fluid supply / discharge pipe does not deviate due to heating for brazing.

【００２８】又、請求項２に記載したアルミニウム合金
製熱交換器の場合には、ろう付けの為の加熱に伴って上
記流体給排口が軟化しても、折り立て板部の片側面が流
体給排口の端縁に対し突っ張る事で、この流体給排管が
垂れ下がり方向に変位する事を防止する。従って、ろう
付けの為の加熱に伴って流体給排口と流体給排管との位
置関係がずれる事がなくなる。In the case of the heat exchanger made of aluminum alloy according to the second aspect, even if the fluid supply / discharge port is softened by heating for brazing, one side of the folded plate portion can be formed. The fluid supply / discharge pipe is prevented from being displaced in the hanging direction by sticking to the edge of the fluid supply / discharge port. Therefore, the positional relationship between the fluid supply / discharge port and the fluid supply / discharge pipe does not deviate due to heating for brazing.

【００２９】[0029]

【００３０】[0030]

【実施例】図１〜４は、請求項１に対応する、本発明の
第一実施例を示している。尚、本発明の特徴は、流体給
排口である流入口１５（及び流出口１６）と、流体給排
管である流入管１７（及び流出管１８）との位置関係が
ずれる事を防止する部分の構造に特徴があり、その他の
部分の構造並びに作用は、前述した従来技術と同様であ
る。よって、従来技術と同等部分に関しては図示並びに
説明を省略し、以下、本発明の特徴部分を中心に説明す
る。1 to 4 show a first embodiment of the present invention. A feature of the present invention is to prevent the positional relationship between the inflow port 15 (and the outflow port 16) as the fluid supply / discharge port and the inflow pipe 17 (and the outflow pipe 18) as the fluid supply / discharge pipe. The structure of the part is characteristic, and the structure and operation of the other parts are the same as those of the above-described related art. Therefore, illustration and description of the same parts as those of the prior art are omitted, and the following description will focus on the characteristic parts of the present invention.

【００３１】アルミニウム合金製のタンク８を構成する
タンク本体１１の側面には、それぞれが筒状の流体給排
口である、流入口１５と流出口１６とを設けている。そ
して、これら各口１５、１６の内側に、それぞれがアル
ミニウム合金製の流体給排管である流入管１７（又は流
出管１８。以下同じ。）を挿入し、これら各管１７（１
８）の内端部外周面と上記流入口１５（又は流出口１
６。以下同じ。）の内周面とをろう付けして、これら各
口１５、１６と各管１７、１８とを、気密且つ液密に接
合している。An inflow port 15 and an outflow port 16, each of which is a cylindrical fluid supply / discharge port, are provided on the side surface of the tank body 11 constituting the aluminum alloy tank 8. Then, an inflow pipe 17 (or an outflow pipe 18, each of which is a fluid supply / discharge pipe made of an aluminum alloy) is inserted into each of the ports 15 and 16, and each of the pipes 17 (1) is inserted.
8) and the outer peripheral surface of the inner end and the inflow port 15 (or the outflow port 1).
6. same as below. ) Is brazed to the inner peripheral surface, and the ports 15, 16 and the pipes 17, 18 are air-tightly and liquid-tightly joined.

【００３２】特に、本発明のアルミニウム合金製熱交換
器に於いては、上記流入口１５の内周面で、ろう付けの
為にタンク本体１１を熱交換器全体の下端に位置させた
際に下側に位置する部分に、鉤部２７を形成している。
この鉤部２７は、タンク内側（図１〜２の下側、図４の
左側）が開口したコ字形の切れ目により三方を囲まれる
部分を、上記流入口１５の内周面から上方に突出する方
向にＬ字形に曲げ起こす事により形成されている。この
鉤部２７は、上記内周面とほぼ平行な抑え板部２８を有
する。In particular, in the aluminum alloy heat exchanger of the present invention, when the tank body 11 is positioned at the lower end of the entire heat exchanger for brazing on the inner peripheral surface of the inflow port 15. A hook 27 is formed in a lower portion.
The hook 27 protrudes upward from the inner peripheral surface of the inflow port 15 at a portion surrounded on three sides by a U-shaped cutout opening inside the tank (the lower side in FIGS. 1 and 2 and the left side in FIG. 4). It is formed by bending in an L-shape in the direction. The hook 27 has a holding plate 28 substantially parallel to the inner peripheral surface.

【００３３】そして、この抑え板部２８の片側面（図３
〜４の下面）と上記流入口１５の内周面（図３〜４の上
面）との間を、上記流入管１７の内端縁部をがたつきな
く挿入自在な係止溝状部２９としている。そして、この
係止溝状部２９に上記流入管１７の内端縁部を挿入した
状態で、この流入管１７の内端部外周面と上記流入口１
６の内周面とをろう付けしている。Then, one side surface of the holding plate portion 28 (FIG. 3)
4 and the inner peripheral surface of the inflow port 15 (the upper surface in FIGS. 3 and 4). And Then, with the inner end edge of the inflow pipe 17 inserted into the locking groove 29, the outer peripheral surface of the inner end of the inflow pipe 17 and the inflow port 1
6 is brazed to the inner peripheral surface.

【００３４】上述の様に構成される本発明のアルミニウ
ム合金製熱交換器は、面倒な工程を要する事なく、ろう
付けの為の加熱に伴って流入口１５と流入管１７との位
置関係がずれる事を防止できる。即ち、図４に示す様に
流入管１７の内端部を流入口１５内に挿入し、この流入
管１７の内端縁部と上記係止溝状部２９とを係合させた
状態では、ろう付け固定以前に於いても、上記流入管１
７の外端部が下方に変位する事がなくなる。With the aluminum alloy heat exchanger of the present invention configured as described above, the positional relationship between the inflow port 15 and the inflow pipe 17 can be reduced with the heating for brazing without any troublesome steps. Deviation can be prevented. That is, as shown in FIG. 4, when the inner end of the inflow pipe 17 is inserted into the inflow port 15 and the inner edge of the inflow pipe 17 is engaged with the locking groove 29, Even before brazing, the inflow pipe 1
The outer end of 7 does not move downward.

【００３５】即ち、ろう付け作業は図４に示す様に、タ
ンク本体１１を下端に位置させた状態で行なう。従っ
て、その内端部のみを流入口１５内に挿入し、外端部を
タンク本体１１から突出させた流入管１７には、自重に
基づいて、図４の時計方向に回転しようとするモーメン
ト荷重が加わる。従来構造の場合、ろう付けの為の加熱
に伴って上記流入口１５が軟化し、この流入口１５によ
る上記流入管１７の支持強度が低下すると、上記モーメ
ント荷重に基づいて流入管１７の外端部（図４の右端
部）が下方に変位し、前述の様に流入管１７の中心と流
出管１８の中心との間にずれδ（図１１）が生じ易かっ
た。That is, the brazing operation is performed with the tank body 11 positioned at the lower end as shown in FIG. Therefore, based on the weight of the inflow pipe 17 whose inner end is inserted into the inflow port 15 and whose outer end protrudes from the tank body 11, a moment load that tends to rotate clockwise in FIG. Is added. In the case of the conventional structure, when the inflow port 15 is softened due to the heating for brazing and the supporting strength of the inflow pipe 17 by the inflow port 15 is reduced, the outer end of the inflow pipe 17 is based on the moment load. The portion (the right end in FIG. 4) was displaced downward, and a shift δ ( FIG. 11 ) was likely to occur between the center of the inflow pipe 17 and the center of the outflow pipe 18 as described above.

【００３６】これに対して本発明のアルミニウム合金製
熱交換器の場合には、ろう付けの為の加熱によって上記
流入口１５が軟化（軟化の程度は限られたものであ
る。）しても、上記流入管１７の内端縁部と係止溝状部
２９との係合に基づき、この流入管１７が、その外端部
を垂れ下げる方向に変位する（図４の時計方向に回動す
る）事がなくなる。従って、ろう付けの為の加熱に伴っ
て流入口１５の中心と流入管１７の中心との間にずれが
生じにくくなる。この結果、タンク本体１１に間隔をあ
けて設けられる流入管１７及び流出管１８に図１２〜１
３に示す様な配管１９、２０の基端部を接続した場合
に、これら両配管１９、２０の先端位置が設計値からず
れにくくなる。又、上記両管１７、１８同士のピッチも
設計値からずれにくくなって、これら両管１７、１８と
上記両配管１９、２０との接続作業を容易に行なえる。
更に、前記鉤部２７は、前記タンク本体１１内への流入
管１７及び流出管１８の挿入量を規制する機能も合わせ
持っている。従って、この挿入量がばらつく事で、上記
先端位置やピッチがずれる事もない。On the other hand, in the case of the aluminum alloy heat exchanger of the present invention, even if the inlet 15 is softened (the degree of softening is limited) by heating for brazing. Due to the engagement between the inner end edge of the inflow pipe 17 and the locking groove 29, the inflow pipe 17 is displaced in a direction in which its outer end hangs down (rotates clockwise in FIG. 4). Will do). Therefore, the center of the inflow port 15 and the center of the inflow pipe 17 are less likely to be displaced due to the heating for brazing. As a result, the inflow pipe 17 and the outflow pipe 18 provided at intervals in the tank main body 11 are shown in FIGS.
When the base ends of the pipes 19 and 20 as shown in FIG. 3 are connected, the tip positions of these two pipes 19 and 20 are less likely to deviate from the design values. Also, the pitch between the two pipes 17 and 18 is hardly deviated from the design value, and the connection work between these two pipes 17 and 18 and the two pipes 19 and 20 can be easily performed.
Further, the hook 27 also has a function of regulating the insertion amount of the inflow pipe 17 and the outflow pipe 18 into the tank main body 11. Therefore, the tip position and the pitch do not shift due to the variation in the insertion amount.

【００３７】次に、図５〜６は、請求項２に対応する、
本発明の第二実施例を示している。本実施例のアルミニ
ウム合金製熱交換器に於いては、流入管１７の中間部外
周面に、折り立て板部３０を形成している。この折り立
て板部３０は、上記流入管１７の外端側（図５〜６の右
側）が開口したコ字形若しくはＵ字形の切れ目の内側
を、上記流入管１７の外周側に向け、下方に折り立てる
事により形成されている。Next, FIGS. 5 and 6 correspond to claim 2.
7 shows a second embodiment of the present invention. In the aluminum alloy heat exchanger of the present embodiment, a folded plate portion 30 is formed on the outer peripheral surface of the middle portion of the inflow pipe 17. The folded plate portion 30 is configured such that the inside of the U-shaped or U-shaped cutout in which the outer end side (the right side in FIGS. 5 and 6) of the inflow pipe 17 is opened is directed downward toward the outer peripheral side of the inflow pipe 17. It is formed by folding.

【００３８】本実施例のアルミニウム合金製熱交換器
は、この折り立て板部３０の片側面（図５〜６の左側
面）とタンク本体１１に形成した流入口１５の端縁とを
当接させた状態で、上記流入管１７の内端部外周面と上
記流入口１５の内周面とをろう付けしている。ろう付け
時に上記折り立て板部３０は、上記流入管１７の下面か
ら下方に垂下した状態とする。In the heat exchanger made of aluminum alloy of the present embodiment, one side surface (left side surface in FIGS. 5 and 6) of the folded plate portion 30 and the edge of the inflow port 15 formed in the tank body 11 abut. In this state, the inner peripheral surface of the inflow pipe 17 and the inner peripheral surface of the inflow port 15 are brazed. At the time of brazing, the folded plate portion 30 is in a state of hanging down from the lower surface of the inflow pipe 17.

【００３９】上述の様に構成される本実施例のアルミニ
ウム合金製熱交換器の場合には、ろう付けの為の加熱に
伴って上記流入口１５が軟化し、上記流入管１７の自重
によるモーメント荷重によりこの流入管１７の外端部が
下方に変位する傾向となっても、上記折り立て板部３０
の片側面が上記流入口１５の端縁に対し突っ張る事で、
この流入管１７が垂れ下がり方向に変位する事がなくな
る。In the case of the aluminum alloy heat exchanger of the present embodiment configured as described above, the inflow port 15 is softened by heating for brazing, and the moment due to the weight of the inflow pipe 17 is reduced. Even if the outer end of the inflow pipe 17 tends to be displaced downward due to the load, the folded plate portion 30
By sticking one side of the end against the edge of the inlet 15,
The inflow pipe 17 is not displaced in the hanging direction.

【００４０】従って、前述した第一実施例の場合と同様
に、配管１９、２０（図１２〜１３）の先端位置が設計
値からずれにくくなるだけでなく、タンク本体１１に間
隔をあけて設けられる流入管１７と流出管１８とのピッ
チがずれる事がなくなって、これら両管１７、１８と上
記配管１９、２０との接続作業を容易に行なえる。更
に、上記折り立て板部３０は、前記タンク本体１１内へ
の流入管１７及び流出管１８の挿入量を規制する機能も
合わせ持っている。従って、この挿入量がばらつく事
で、上記先端位置やピッチがずれる事もない。Therefore, as in the case of the first embodiment described above, not only are the tip positions of the pipes 19 and 20 ( FIGS. 12 to 13 ) less likely to deviate from the design values, but also the The pitch between the inflow pipe 17 and the outflow pipe 18 does not shift, and the connection work between the pipes 17 and 18 and the pipes 19 and 20 can be easily performed. Further, the folded plate portion 30 also has a function of regulating the insertion amount of the inflow pipe 17 and the outflow pipe 18 into the tank body 11. Therefore, the tip position and the pitch do not shift due to the variation in the insertion amount.

【００４１】[0041]

【００４２】[0042]

【００４３】[0043]

【発明の効果】本発明のアルミニウム合金製熱交換器は
以上に述べた通り構成され作用する為、面倒な工程を要
する事なく、ろう付けに伴う加熱によって流体給排口と
流体給排管との位置関係がずれる事を防止できる。この
結果、流体移送用の配管同士、或は配管と流体給排管の
接続作業を確実に行なえるアルミニウム合金製熱交換器
を、安価に製作できる。The aluminum alloy heat exchanger of the present invention is constructed and operates as described above, so that the fluid supply / discharge port and the fluid supply / discharge pipe can be formed by heating accompanying brazing without requiring a complicated process. Can be prevented from shifting. As a result, a heat exchanger made of an aluminum alloy, which can reliably connect the fluid transfer pipes or the pipe and the fluid supply / discharge pipe, can be manufactured at low cost.

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

【図１】本発明の第一実施例に使用するタンク本体を、
ろう付け加熱時の姿勢で下側から見た図。FIG. 1 shows a tank body used in a first embodiment of the present invention,
The figure seen from the lower side in the attitude | position at the time of brazing heating.

【図２】図１のＡ部拡大図。FIG. 2 is an enlarged view of a portion A in FIG.

【図３】流入口部分の斜視図。FIG. 3 is a perspective view of an inlet portion.

【図４】流入口に流入管の内端部を挿入し、ろう付け加
熱時の姿勢で示す断面図。FIG. 4 is a cross-sectional view showing the posture at the time of brazing heating with the inner end of the inflow pipe inserted into the inflow port.

【図５】本発明の第二実施例を示す分解斜視図。FIG. 5 is an exploded perspective view showing a second embodiment of the present invention.

【図６】流入口に流入管の内端部を挿入し、ろう付け加
熱時の姿勢で示す断面図。FIG. 6 is a cross-sectional view showing the posture at the time of brazing heating with the inner end of the inflow pipe inserted into the inflow port.

【図７】本発明の対象となるアルミニウム合金製熱交換
器の１例を示す要部分解斜視図。 FIG. 7 shows a heat exchange made of an aluminum alloy to which the present invention is applied.
FIG. 2 is an exploded perspective view of a main part showing an example of a container.

【図８】従来構造を示す要部断面図。 FIG. 8 is a sectional view of a main part showing a conventional structure.

【図９】従来構造に使用するタンク本体を示す、図１と
同様の図。 FIG. 9 shows a tank body used in a conventional structure,
FIG.

【図１０】流入管及び流出管を接続した状態で示す、図
９と同様の図。 FIG. 10 shows a state in which an inflow pipe and an outflow pipe are connected.
FIG.

【図１１】流入管の中心と流出管の中心とがずれた状態
を示す、図１０の上方から見た図。 FIG. 11 shows a state in which the center of the inflow pipe and the center of the outflow pipe are shifted.
FIG. 11 is a view from above of FIG.

【図１２】アルミニウム合金製熱交換器に接続する配管
を示す正面図。 FIG. 12 Piping connected to an aluminum alloy heat exchanger
FIG.

【図１３】図１２の右方から見た図。 FIG. 13 is a view seen from the right side of FIG . 12;

【図１４】ろう付けに伴う流入管の変位防止の為の従来
構造の第１例を示す断面図。 FIG. 14 shows a conventional method for preventing displacement of an inflow pipe due to brazing .
Sectional drawing which shows the 1st example of a structure.

【図１５】同第２例を示す分解斜視図。 FIG. 15 is an exploded perspective view showing the second example.

【図１６】同第３例を示す分解斜視図。 FIG. 16 is an exploded perspective view showing the third example.

【図１７】同第４例を示す分解斜視図。 FIG. 17 is an exploded perspective view showing the fourth example.

【図１８】第４例の構造の組み立てた状態で示す断面
図。 FIG. 18 is a cross-sectional view showing the assembled state of the structure of the fourth example .
FIG.

【符号の説明】[Explanation of symbols]

１ａ 突出部 １ｂ 突出部 ２ 金属板 ３ 凹部 ４ 突起 ５ 折り返し流路 ６ａ 接合部 ６ｂ 接合部 ７ 素子 ８ タンク ９ 接合孔 １０ 座板 １１ タンク本体 １２ 隔壁 １３ 入口室 １４ 出口室 １５ 流入口 １６ 流出口 １７ 流入管 １８ 流出管 １９、２０ 配管 ２１ ブラケット ２２ 係止凹部 ２３ 係止凸部 ２４ 係止突起 ２５ 係止舌片 ２６ 係止凹部 ２７ 鉤部 ２８ 抑え板部 ２９ 係止溝状部 ３０ 折り立て板部 DESCRIPTION OF SYMBOLS 1a Projection part 1b Projection part 2 Metal plate 3 Concave part 4 Projection 5 Return channel 6a Joint part 6b Joint part 7 Element 8 Tank 9 Joint hole 10 Seat plate 11 Tank body 12 Partition wall 13 Inlet chamber 14 Outlet chamber 15 Inlet 16 Outlet DESCRIPTION OF SYMBOLS 17 Inflow pipe 18 Outflow pipe 19, 20 Piping 21 Bracket 22 Locking concave part 23 Locking convex part 24 Locking protrusion 25 Locking tongue piece 26 Locking concave part 27 Hook part 28 Suppression plate part 29 Locking groove part 30 Folding Board

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平４−122981（ＪＰ，Ｕ) 実開 昭60−66990（ＪＰ，Ｕ) 実開 平４−63985（ＪＰ，Ｕ) 実開 昭58−158983（ＪＰ，Ｕ) 実開 平６−55074（ＪＰ，Ｕ) 実公 昭54−39729（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.⁷，ＤＢ名) F28F 9/00 - 9/26 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-1222981 (JP, U) JP-A 60-66990 (JP, U) JP-A 4-63985 (JP, U) JP-A 58- 158983 (JP, U) Japanese Utility Model Application Hei 6-55074 (JP, U) Japanese Utility Model Application 54-39729 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28F 9/00-9 / 26

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 それぞれがアルミニウム合金により造ら
れた多数の伝熱管相当部とフィンとから成るコア部と、
このコア部の端部に設けられた、アルミニウム合金製の
タンクと、このタンクの側面に設けられた筒状の流体給
排口と、この流体給排口に挿入した状態でこの流体給排
口にろう付け接合された、アルミニウム合金製の流体給
排管とを備えたアルミニウム合金製熱交換器に於いて、
上記流体給排口の一部でろう付け時に下面となる部分に
形成された、タンク内側が開口したコ字形の切れ目によ
り三方を囲まれる部分を上記流体給排口の内周面から上
方に突出する方向にＬ字形に曲げ起こす事により形成さ
れ、上記内周面とほぼ平行な抑え板部を有する鉤部と、
この抑え板部の片側面と上記流体給排口の内周面とで構
成され、上記流体給排管の端縁部をがたつきなく挿入自
在な係止溝状部とを備え、この係止溝状部に上記流体給
排管の端縁部を挿入した状態で、この流体給排管の端部
外周面と上記流体給排口の内周面とがろう付けされてい
る事を特徴とするアルミニウム合金製熱交換器。1. A core portion comprising a plurality of heat transfer tube equivalent portions and fins each made of an aluminum alloy,
An aluminum alloy tank provided at an end of the core portion, a cylindrical fluid supply / discharge port provided on a side surface of the tank, and a fluid supply / discharge port inserted into the fluid supply / discharge port. An aluminum alloy heat exchanger having an aluminum alloy fluid supply / discharge pipe brazed to
A portion formed on a part of the fluid supply / discharge port which becomes a lower surface during brazing and surrounded by a U-shaped cut opening on the inside of the tank and projecting upward from the inner peripheral surface of the fluid supply / discharge port. A hook portion formed by bending and raising in an L-shape in a direction to have a holding plate portion substantially parallel to the inner peripheral surface;
A locking groove formed by one side surface of the holding plate portion and an inner peripheral surface of the fluid supply / discharge port, and capable of freely inserting an end edge of the fluid supply / discharge tube without looseness; The end outer peripheral surface of the fluid supply / drain tube and the inner peripheral surface of the fluid supply / drain port are brazed in a state where the end portion of the fluid supply / drain tube is inserted into the groove portion. Aluminum alloy heat exchanger. 【請求項２】 それぞれがアルミニウム合金により造ら
れた多数の伝熱管相当部とフィンとから成るコア部と、
このコア部の端部に設けられた、アルミニウム合金製の
タンクと、このタンクの側面に設けられた筒状の流体給
排口と、この流体給排口に挿入した状態でこの流体給排
口にろう付け接合された、アルミニウム合金製の流体給
排管とを備えたアルミニウム合金製熱交換器に於いて、
上記流体給排口は上記タンクの外側に突出する状態で設
けられており、上記流体給排管の中間部でろう付け時に
下面となる部分の外周面に、この流体給排管の外端側が
開口したコ字形若しくはＵ字形の切れ目の内側を上記外
周面から下方に突出する方向に折り立てる事により形成
された折り立て板部を備え、この折り立て板部の片側面
と上記流体給排口の端縁とを当接させた状態で、この流
体給排管の端部外周面と上記流体給排口の内周面とがろ
う付けされている事を特徴とするアルミニウム合金製熱
交換器。2. A core portion comprising a plurality of heat transfer tube equivalent portions and fins each made of an aluminum alloy,
An aluminum alloy tank provided at an end of the core portion, a cylindrical fluid supply / discharge port provided on a side surface of the tank, and a fluid supply / discharge port inserted into the fluid supply / discharge port. An aluminum alloy heat exchanger having an aluminum alloy fluid supply / discharge pipe brazed to
The fluid supply / discharge port is provided so as to protrude outside the tank.
Vignetting is, the outer peripheral surface of the portion that becomes the lower surface during brazing at an intermediate portion of the fluid supply and discharge pipe, the outer peripheral surface of the inner cut C-shaped or U-shaped outer end is open to the fluid supply and discharge line A folding plate portion formed by folding up in a direction protruding downward from the fluid supply / discharge port in a state where one side surface of the folding plate portion abuts against the edge of the fluid supply / drain port. An aluminum alloy heat exchanger, wherein an outer peripheral surface of an end portion of a discharge pipe and an inner peripheral surface of the fluid supply / discharge port are brazed.