JP2010269413A - Repairing or reinforcing method of heat exchanger made of aluminum - Google Patents

Repairing or reinforcing method of heat exchanger made of aluminum Download PDF

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JP2010269413A
JP2010269413A JP2009124013A JP2009124013A JP2010269413A JP 2010269413 A JP2010269413 A JP 2010269413A JP 2009124013 A JP2009124013 A JP 2009124013A JP 2009124013 A JP2009124013 A JP 2009124013A JP 2010269413 A JP2010269413 A JP 2010269413A
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filler
heat exchanger
edge
tube
repairing
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Masaaki Nakajima
雅章 中島
Mitsugi Iizuka
貢 飯塚
Shunichiro Kuma
俊一郎 隈
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T Rad Co Ltd
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T Rad Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a repairing or reinforcing method in a junction of a flat tube 1 and a tube plate 3, which provides water resistance, heat resistance, and cold resistance after repairing, and also provides good space fillability and sealability, and durability in a cold and heat repeating test. <P>SOLUTION: A liquid silicon series filling agent having rubber elasticity after curing is applied to an edge of one side of a heat exchanger core 5a in its width direction, and the filling agent is cured after the agent is filled so as to reach from the one side to the other side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、多数の偏平チューブとフィンとが交互に並列されると共に、各チューブの端部がチューブプレートの挿通孔に挿通され、その挿通部がろう付け固定されたアルミニウム製熱交換器の補修方法または補強方法に関し、特に偏平チューブの付根とチューブプレートの挿通部における漏れを充填剤で塞ぐ補修方法または補強方法に関する。   The present invention repairs an aluminum heat exchanger in which a number of flat tubes and fins are alternately arranged in parallel, and the end portions of each tube are inserted into the insertion holes of the tube plate, and the insertion portions are brazed and fixed. The present invention relates to a method or a reinforcing method, and more particularly, to a repairing method or a reinforcing method in which a leak is blocked with a filler at the root of a flat tube and an insertion portion of the tube plate.

アルミニウム製熱交換器に生じる漏れの大半は、偏平チューブの付根とチューブプレートのチューブ挿通孔との間で生じる。アルミニウム製熱交換器は、その材料が比較的低融点であるため、補修部分をバーナ等によりハンダ付け修理することが不可能である。そのため従来はエポキシ系接着剤を偏平チューブの付根に充填して、穴あきを防ぐ修理方法が一般的に行われていた。
これは液状接着剤で、その接着剤を塗布後加熱することにより硬化するものである。その硬化後は硬い補修層が形成される。 Most leaks that occur in aluminum heat exchangers occur between the root of the flat tube and the tube insertion hole of the tube plate. Since the heat exchanger made of aluminum has a relatively low melting point, the repaired portion cannot be repaired by soldering with a burner or the like. For this reason, conventionally, a repair method for filling a base of the flat tube with an epoxy adhesive to prevent perforation has been generally performed.
This is a liquid adhesive that is cured by heating after application of the adhesive. After the curing, a hard repair layer is formed.

エポキシ系の充填剤は加熱硬化型であり、硬化後に硬い補修層を作る。チューブの付根とチューブプレートのチューブ挿通孔との隙間が0.1ミリ以下の場合には有効であるが、それ以上の隙間の場合に、適用するとその補修層は衝撃や熱応力によって亀裂を生じるおそれがある。特に、建設機械用の熱交換器の如く、大型の熱交換器の場合には、上記隙間が大きくなりがちであり、それに対応できなかった。また、大型熱交換器は、チューブの長さが長く（一例として１ｍ）熱応力が大きくなり、使用中に漏れを起こすことがしばしば生じた。
そこで、本発明はかかる欠点を解決する補修または補強することを課題とする。 Epoxy fillers are heat-curing and produce a hard repair layer after curing. It is effective when the gap between the tube root and the tube insertion hole of the tube plate is 0.1 mm or less, but if it is more than that, the repair layer may crack due to impact or thermal stress. is there. In particular, in the case of a large heat exchanger such as a heat exchanger for a construction machine, the gap tends to be large, and it has not been possible to cope with it. In addition, large heat exchangers have long tube lengths (for example, 1 m as an example), and thermal stress often increases, often causing leakage during use.
Therefore, an object of the present invention is to repair or reinforce such a drawback.

請求項１に記載の本発明は、多数の並列された偏平チューブ(1) とフィン(2) と、多数のチューブ挿通孔(3a)が並列されると共に、その挿通孔(3a)の孔縁部がタンク本体(4)側にバーリング加工された細長いチューブプレート(3)とを具備し、それぞれの偏平チューブ(1) の端部が、前記チューブ挿通孔(3a)に挿通され、その挿通部がろう付け固定されて熱交換器コア(5a)を構成するアルミニウム製熱交換器の補修方法または補強方法において、
前記熱交換器コア(5a)の幅方向の一方側の縁に、硬化後にゴム弾性を有する液状のシリコン系充填剤(6)を塗布し、その一方側から他方側に充填剤が達するように充填した後に、その充填剤を硬化させることを特徴とするアルミニウム製熱交換器の補修方法または補強方法である。 The present invention according to claim 1 includes a large number of parallel flat tubes (1) and fins (2) and a large number of tube insertion holes (3a) arranged in parallel, and the edge of the insertion hole (3a). Each of the flat tube (1) is inserted into the tube insertion hole (3a), and the insertion portion is provided with an elongated tube plate (3) burring processed on the tank body (4) side. In the repairing or reinforcing method of the aluminum heat exchanger that is brazed and fixed to constitute the heat exchanger core (5a),
A liquid silicone filler (6) having rubber elasticity after curing is applied to one edge in the width direction of the heat exchanger core (5a) so that the filler reaches from one side to the other side. A method of repairing or reinforcing an aluminum heat exchanger, wherein the filler is cured after filling.

請求項２に記載の本発明は、請求項１において、
前記一方側の縁に、液状のシリコン系充填剤(6)を塗布し、その熱交換器コア(5a)を前記他方側に傾けて充填剤(6)を一方側から他方側に移動充填する初期工程と、
前記傾斜により、前記一方の縁の充填剤の量が減少した後に、再度、前記一方の縁にその充填剤(6)を塗布して、前記同様に傾け、その液状のシリコン系充填剤(6)が前記他方の縁に達する迄、繰り返す後工程と、
その後、熱交換器コア(5a)を垂直に位置して充填剤を硬化させる工程と、を有することを特徴とするアルミニウム製熱交換器の補修方法または補強方法である。 The present invention according to claim 2 is the method according to claim 1,
A liquid silicon-based filler (6) is applied to the edge of the one side, and the heat exchanger core (5a) is inclined to the other side to move and fill the filler (6) from one side to the other side. Initial process;
After the amount of the filler on the one edge decreases due to the inclination, the filler (6) is applied again to the one edge, and the liquid silicon filler (6 ) Repeats until the other edge is reached, and
Thereafter, the heat exchanger core (5a) is positioned vertically to cure the filler, and this is a method for repairing or reinforcing an aluminum heat exchanger.

本発明のアルミニウム製熱交換器の補修方法または補強方法は、熱交換器コア５ａの幅方向の一方側の縁にシリコン系充填剤６を塗布し、その一方側から他方側に充填剤が達するように充填した後に、その充填剤を硬化させ、硬化後にゴム弾性を有する充填剤がチューブプレート３全面を覆うように形成されるから、多数の偏平チューブ１の付根部とチューブ挿通孔３ａとを同時に気密に保持し、信頼性の高い補修または補強を行うことができる。特に、チューブとチューブプレートのチューブ挿通孔との隙間が大きく（0.1〜0.8ミリの隙間にも有効であることが確認された）ても、その気密性、液密性を永続的に保つことができる信頼性の高いものとなる。   In the repair method or reinforcement method of the aluminum heat exchanger of the present invention, the silicon-based filler 6 is applied to the edge on one side in the width direction of the heat exchanger core 5a, and the filler reaches from one side to the other side. After the filling, the filler is cured, and after curing, the filler having rubber elasticity is formed so as to cover the entire surface of the tube plate 3, so that the root portions of the flat tubes 1 and the tube insertion holes 3a are formed. At the same time, it can be kept airtight and can be repaired or reinforced with high reliability. In particular, even if the gap between the tube and the tube insertion hole of the tube plate is large (it has been confirmed to be effective even for gaps of 0.1 to 0.8 mm), its airtightness and liquid tightness can be maintained permanently. Can be reliable.

上記構成において、シリコン系充填剤６を一方側の縁に塗布し、熱交換器コア５ａを他方側に傾けてシリコン系充填剤６を一方側から他方側に移動充填する初期工程と、再度一方の縁全体にシリコン系充填剤６を塗布して同様に傾け、シリコン系充填剤６が他方の縁に達するまで繰返し行う後工程と、その後、熱交換器コア５ａを垂直に維持して充填剤を硬化させる工程と、をとることにより、シリコン系充填剤６をチューブプレート３全面に渡って確実に充填すると共に、その硬化中にシリコン系充填剤６を水平にして、均一な補修面を形成することができる。それにより、より信頼性の高い補修または補強を行うことができる。   In the above configuration, an initial step of applying the silicon-based filler 6 to the edge on one side, tilting the heat exchanger core 5a to the other side, and moving and filling the silicon-based filler 6 from one side to the other side; The silicon filler 6 is applied to the entire edge of the substrate and tilted in the same manner, and repeatedly performed until the silicon filler 6 reaches the other edge, and then the heat exchanger core 5a is maintained vertically to maintain the filler. The silicon filler 6 is surely filled over the entire surface of the tube plate 3 and the silicon filler 6 is leveled during the curing to form a uniform repair surface. can do. Thereby, repair or reinforcement with higher reliability can be performed.

本発明のアルミニウム製熱交換器５の補修方法または補強方法の第１工程を示す。The 1st process of the repair method or reinforcement method of the aluminum heat exchanger 5 of this invention is shown. 図１のII−II矢視断面図。II-II arrow sectional drawing of FIG. 図２におけるシリコン系充填剤６を熱交換器５の一方側から他方側に移動充填するときの熱交換器５の傾斜状態を示す説明図。Explanatory drawing which shows the inclination state of the heat exchanger 5 when moving and filling the silicon-type filler 6 in FIG. 2 from the one side of the heat exchanger 5 to the other side. シリコン系充填剤６を再充填する説明図。Explanatory drawing which refills the silicon-type filler 6. FIG. 再度熱交換器５を傾斜させてシリコン系充填剤６を移動させる説明図。Explanatory drawing which inclines the heat exchanger 5 again and moves the silicon-type filler 6. FIG. シリコン系充填剤６の充填の完了状態を示す説明図であると共に、シリコン系充填剤６の硬化工程を示す説明図。FIG. 6 is an explanatory view showing a completed state of filling with the silicon-based filler 6 and an explanatory view showing a curing process of the silicon-based filler 6. 図６のVII−VII矢視断面図。VII-VII arrow sectional drawing of FIG.

次に、図面に基づいて本発明の実施の形態につき説明する。
この補修の対象となるアルミニウム製熱交換器は、図１に示すごとく、多数の並列された偏平チューブ１とフィン２と、チューブプレート３とにより熱交換器コア５ａを構成する。そのチューブプレート３は、全体が細長い平面形状を有し、多数のチューブ挿通孔３ａが長手方向に互いに離間して並列され、そのチューブ挿通孔３ａの孔縁部はタンク本体４側にバーリング加工されている。それと共に、この例ではチューブプレート３の周縁部に環状凸部８が形成され、その環状凸部８の内面側は環状溝に形成されている。そして、その環状溝にＯリング９を介してタンク本体４の裾部が嵌着され、Ｏリング９を押圧した状態でチューブプレート３の縁部がカシメ固定されたものである。 Next, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the aluminum heat exchanger to be repaired constitutes a heat exchanger core 5 a with a large number of parallel flat tubes 1, fins 2, and tube plates 3. The tube plate 3 has an elongated planar shape as a whole, and a large number of tube insertion holes 3a are arranged in parallel with being spaced apart from each other in the longitudinal direction. The edge of the tube insertion hole 3a is subjected to burring on the tank body 4 side. ing. In addition, in this example, an annular convex portion 8 is formed on the peripheral edge portion of the tube plate 3, and the inner surface side of the annular convex portion 8 is formed in an annular groove. Then, the bottom of the tank body 4 is fitted into the annular groove via the O-ring 9, and the edge of the tube plate 3 is crimped and fixed with the O-ring 9 pressed.

この例におけるフィン２はコルゲート型のものであり、その端部は図７に示すごとく、チューブプレート３から所定距離離間している。また、タンク本体４は樹脂製のものであるが、それをアルミニウム製のものとし、タンク本体４とチューブプレート３との間を一体的にろう付け固定することもできる。   The fin 2 in this example is of a corrugated type, and its end is separated from the tube plate 3 by a predetermined distance as shown in FIG. Although the tank body 4 is made of resin, it can be made of aluminum, and the tank body 4 and the tube plate 3 can be integrally brazed and fixed.

（検証例１）
本発明に用いる充填剤は、シリコン系充填剤であり、有機ポリシロキサン混合物（これはＳｉと酸素を骨格とする化合物であり、一般式：Ｒ３ＳｉＯ‐（Ｒ２ＳｉＯ）ｎ‐ＳｉＲ３であらわされる。）であり、一例として、信越化学製の充填剤のＫＥ−４４１−Ｔを用いることができる。これは硬化後ゴム弾性を有する。そして初期剥離強度を２０２．２Ｎ（ただし剥離面積２５ｍｍ×１５ｍｍ）とする。 (Verification example 1)
The filler used in the present invention is a silicon-based filler, an organic polysiloxane mixture (this is a compound having a skeleton of Si and oxygen, and has a general formula: R 3 SiO— (R 2 SiO) n —SiR 3 As an example, a filler KE-441-T manufactured by Shin-Etsu Chemical can be used. This has rubber elasticity after curing. The initial peel strength is 202.2 N (however, the peel area is 25 mm × 15 mm).

この充填剤はアルミニウム製熱交換器のチューブプレートとチューブとの付根に使用した（付根部の補修すべき隙間が0.1ミリ〜0.8ミリ）とき、熱交換器で使用されうる耐水性、耐熱性、耐寒性を有することが分かった。それと共に、隙間充填性（シール性）を有する。さらには冷熱繰返し試験（条件：高温の流体温度90℃，低温の流体温度10℃を用意し、チューブ内に両流体を交互に流通させる。その１サイクルを120秒とする）を行った。本発明の熱交換器の補修品と、未補修の正常な熱交換器を比較したところ、補修品は未補修品に比べて５倍以上の冷熱繰返し試験に耐えることが分かった。   When this filler is used at the root of the tube plate and tube of an aluminum heat exchanger (the gap to be repaired at the root is 0.1 mm to 0.8 mm), the water resistance, heat resistance, It was found to have cold resistance. At the same time, it has gap filling properties (sealability). In addition, a cold heat cycle test (conditions: a high fluid temperature of 90 ° C. and a low fluid temperature of 10 ° C. were prepared, and both fluids were alternately circulated in the tube. One cycle was 120 seconds). When the repaired product of the heat exchanger of the present invention was compared with a normal heat exchanger that had not been repaired, it was found that the repaired product withstands a repeated cooling test at least five times that of the unrepaired product.

この結果、本発明の方法は、漏れの生じた熱交換器の補修のみならず、漏れのない正常な熱交換器の補強に役立つことが分かった。そこで、本発明の方法は、熱交換器の補修方法または補強方法を対象とする。なお、上記に使用した充填剤は室温にて硬化するものであり、一液性のもので簡易な取り扱いが可能なものである。
また、熱交換器のろう付けには、通常フラックスを使用するが、そのフラックスがろう付け後に残渣として熱交換器表面に付着する。その残渣が付着した状態でも、本発明の方法に用いるシリコン系充填剤は、充分なる補修および補強効果があることが実験により確かめられた。 As a result, it has been found that the method of the present invention is useful not only for repairing leaky heat exchangers but also for reinforcing normal heat exchangers without leaks. Therefore, the method of the present invention is directed to a heat exchanger repair method or reinforcement method. The filler used above cures at room temperature, and is a one-component one that can be easily handled.
Further, a flux is usually used for brazing the heat exchanger, but the flux adheres to the surface of the heat exchanger as a residue after brazing. It was confirmed by experiments that the silicon-based filler used in the method of the present invention has sufficient repair and reinforcement effects even when the residue is adhered.

（補修方法または補強方法）
このようなシリコン系充填剤を、まず図１および図２に示すごとく、熱交換器コア５ａの幅方向の一方側の縁のチューブ付根部、あるいは一方側の縁全体に、環状凸部８の内側へ塗布する。この例では充填剤容器７からシリコン系充填剤６を押出し、縁全体に均一に塗布する。この充填剤は一定の粘度を有するが流動性を有し、斜面を所定時間かけて流動する。このとき、環状凸部８の存在により充填剤が外側に流出することはない。 (Repair method or reinforcement method)
First, as shown in FIGS. 1 and 2, such a silicon-based filler is formed on the tube root portion on one side edge in the width direction of the heat exchanger core 5a or on the entire edge on one side of the annular convex portion 8. Apply inside. In this example, the silicon filler 6 is extruded from the filler container 7 and uniformly applied to the entire edge. This filler has a certain viscosity but fluidity, and flows on the slope over a predetermined time. At this time, the filler does not flow out due to the presence of the annular convex portion 8.

そこで、図３のごとく熱交換器５を他方側に傾斜させる。すると、シリコン系充填剤６は一方側から他方側に流動する。そして、その分だけ他方側のシリコン系充填剤６の高さが低くなる。そこで、図４に示すごとく再度、第２回目のシリコン系充填剤６を熱交換器コア５ａの幅方向一方側に充填する。次に、前記同様図５のごとく、熱交換器５を傾斜させる。このような充填作業を繰返すと、補修材６はチューブプレート３の幅方向の一方側から他方側まで達する。そこで、その他方側に達したことを確認したうえで、図６のごとく熱交換器５のチューブプレート３を水平に維持し、室内での自然乾燥を行う。すなわち室温硬化させる。なお、充填剤の深さは、チューブプレート３の基準面から３ｍｍ程度が好ましい。その充填剤は、図７に示す如く、チューブプレート３の基準面上のみならず、バーリング加工部3bの凹陥した内部にも進入している。   Therefore, the heat exchanger 5 is inclined to the other side as shown in FIG. Then, the silicon-based filler 6 flows from one side to the other side. Then, the height of the silicon filler 6 on the other side is lowered accordingly. Therefore, as shown in FIG. 4, the second silicon-based filler 6 is filled again on one side in the width direction of the heat exchanger core 5a. Next, the heat exchanger 5 is inclined as in FIG. When such a filling operation is repeated, the repair material 6 reaches from the one side in the width direction of the tube plate 3 to the other side. Therefore, after confirming that the other side has been reached, the tube plate 3 of the heat exchanger 5 is kept horizontal as shown in FIG. 6 and is naturally dried indoors. That is, it is cured at room temperature. The depth of the filler is preferably about 3 mm from the reference surface of the tube plate 3. As shown in FIG. 7, the filler enters not only the reference surface of the tube plate 3 but also the recessed portion of the burring portion 3b.

（検証例２）
このような補修の結果、偏平チューブ１の付根部に漏れの存在した熱交換器において、減圧試験を行ったところ、１４７ｋＰａの圧力に耐え、補修部の漏れが存在しなかった。次に、正圧破壊試験を行ったところ３５０ｋＰａ前後でタンクのカシメ部に漏れが発生したが補修部の漏れは存在しなかった。
次にインパルス試験（条件：雰囲気温度を80℃とし、圧力を０から140ｋPaGまで加圧し、１サイクルを2.5秒で実施する）を、およそ３６０００回行ったところ、タンクのカシメ部に漏れが生じた。しかしながら補修部には漏れは生じなかった。 (Verification example 2)
As a result of such repair, when a pressure reduction test was performed in a heat exchanger in which a leak occurred in the root portion of the flat tube 1, it was able to withstand a pressure of 147 kPa and there was no leak in the repair portion. Next, when a positive pressure fracture test was performed, a leak occurred in the caulking portion of the tank at around 350 kPa, but there was no leakage in the repair portion.
Next, an impulse test (condition: the ambient temperature was set to 80 ° C., the pressure was increased from 0 to 140 kPaG, and one cycle was performed in 2.5 seconds) was performed approximately 36000 times, and leakage occurred in the caulking portion of the tank. . However, no leakage occurred in the repair area.

１ 偏平チューブ
２ フィン
３ チューブプレート
3a チューブ挿通孔
3b バーリング加工部
４ タンク本体 1 Flat tube 2 Fin 3 Tube plate
3a Tube insertion hole
3b Burring section 4 Tank body

５ 熱交換器
5a 熱交換器コア
６ シリコン系充填剤
７ 充填剤容器
８ 環状凸部
９ Ｏリング 5 Heat exchanger
5a Heat exchanger core 6 Silicone filler 7 Filler container 8 Annular projection 9 O-ring

Claims (2)

多数の並列された偏平チューブ(1) とフィン(2) と、多数のチューブ挿通孔(3a)が並列されると共に、その挿通孔(3a)の孔縁部がタンク本体(4)側にバーリング加工された細長いチューブプレート(3)とを具備し、それぞれの偏平チューブ(1) の端部が、前記チューブ挿通孔(3a)に挿通され、その挿通部がろう付け固定されて熱交換器コア(5a)を構成するアルミニウム製熱交換器の補修方法において、
前記熱交換器コア(5a)の幅方向の一方側の縁に、硬化後にゴム弾性を有する液状のシリコン系充填剤(6)を塗布し、その一方側から他方側に充填剤が達するように充填した後に、その充填剤を硬化させることを特徴とするアルミニウム製熱交換器の補修方法または補強方法。 A number of parallel flat tubes (1) and fins (2) and a number of tube insertion holes (3a) are arranged in parallel, and the edge of the insertion hole (3a) is burring on the tank body (4) side. An elongated tube plate (3) processed, and the end of each flat tube (1) is inserted into the tube insertion hole (3a), and the insertion portion is brazed and fixed to form a heat exchanger core. In the repair method of the aluminum heat exchanger constituting (5a),
A liquid silicone filler (6) having rubber elasticity after curing is applied to one edge in the width direction of the heat exchanger core (5a) so that the filler reaches from one side to the other side. A method of repairing or reinforcing an aluminum heat exchanger, wherein the filler is cured after filling. 請求項１において、
前記一方側の縁に、液状のシリコン系充填剤(6)を塗布し、その熱交換器コア(5a)を前記他方側に傾けて充填剤(6)を一方側から他方側に移動充填する初期工程と、
前記傾斜により、前記一方の縁の充填剤の量が減少した後に、再度、前記一方の縁にその充填剤(6)を塗布して、前記同様に傾け、その液状のシリコン系充填剤(6)が前記他方の縁に達する迄、繰り返す後工程と、
その後、熱交換器コア(5a)を垂直に位置して充填剤を硬化させる工程とを有することを特徴とするアルミニウム製熱交換器の補修方法または補強方法。 In claim 1,
A liquid silicon-based filler (6) is applied to the edge of the one side, and the heat exchanger core (5a) is inclined to the other side to move and fill the filler (6) from one side to the other side. Initial process;
After the amount of the filler on the one edge decreases due to the inclination, the filler (6) is applied again to the one edge, and the liquid silicon filler (6 ) Repeats until the other edge is reached, and
Thereafter, the heat exchanger core (5a) is positioned vertically to cure the filler, and a method for repairing or reinforcing an aluminum heat exchanger is provided.
JP2009124013A 2009-05-22 2009-05-22 Repairing or reinforcing method of heat exchanger made of aluminum Pending JP2010269413A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114799724A (en) * 2022-05-18 2022-07-29 天津电力机车有限公司 Method for repairing leakage fault of plate-fin radiator based on composite bonding

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05141894A (en) * 1991-11-19 1993-06-08 Showa Alum Corp Heat exchanger
JPH06159971A (en) * 1992-11-20 1994-06-07 Showa Alum Corp Heat exchanger
JPH07120187A (en) * 1993-10-20 1995-05-12 Takagi Ind Co Ltd Method and satructure for sealing heat-exchanger
JP2001091177A (en) * 1999-09-17 2001-04-06 Denso Corp Repairing method for heat exchanger
JP2001170823A (en) * 1999-12-17 2001-06-26 Nkk Corp Repairing method for cracked part of metallic structure
JP2007170805A (en) * 2005-05-11 2007-07-05 Denso Corp Brazed structure and method of manufacturing the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05141894A (en) * 1991-11-19 1993-06-08 Showa Alum Corp Heat exchanger
JPH06159971A (en) * 1992-11-20 1994-06-07 Showa Alum Corp Heat exchanger
JPH07120187A (en) * 1993-10-20 1995-05-12 Takagi Ind Co Ltd Method and satructure for sealing heat-exchanger
JP2001091177A (en) * 1999-09-17 2001-04-06 Denso Corp Repairing method for heat exchanger
JP2001170823A (en) * 1999-12-17 2001-06-26 Nkk Corp Repairing method for cracked part of metallic structure
JP2007170805A (en) * 2005-05-11 2007-07-05 Denso Corp Brazed structure and method of manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114799724A (en) * 2022-05-18 2022-07-29 天津电力机车有限公司 Method for repairing leakage fault of plate-fin radiator based on composite bonding
CN114799724B (en) * 2022-05-18 2023-07-28 天津电力机车有限公司 Composite adhesion-based plate-fin radiator leakage fault repairing method

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