JPH04138587U - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH04138587U JPH04138587U JP5224391U JP5224391U JPH04138587U JP H04138587 U JPH04138587 U JP H04138587U JP 5224391 U JP5224391 U JP 5224391U JP 5224391 U JP5224391 U JP 5224391U JP H04138587 U JPH04138587 U JP H04138587U
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- aluminum
- joint
- stainless steel
- brass
- 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
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 41
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 26
- 239000010951 brass Substances 0.000 claims abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 26
- 239000010935 stainless steel Substances 0.000 claims abstract description 26
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 description 17
- 239000010949 copper Substances 0.000 description 17
- 238000005219 brazing Methods 0.000 description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 15
- 229910000679 solder Inorganic materials 0.000 description 13
- 230000005496 eutectics Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 230000009972 noncorrosive effect Effects 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011253 protective coating Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 229910018125 Al-Si Inorganic materials 0.000 description 2
- 229910018520 Al—Si Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910018137 Al-Zn Inorganic materials 0.000 description 1
- 229910018523 Al—S Inorganic materials 0.000 description 1
- 229910018573 Al—Zn Inorganic materials 0.000 description 1
- 241001676573 Minium Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
(57)【要約】
【目的】黄銅製継手と、熱交換器基部に連結されるアル
ミニウム製配管とを具備する熱交換器において、耐蝕性
の向上及び継手強度の向上を図る。
【構成】黄銅製継手１とステンレス鋼製連結筒体３の一
端部とをろう付けする。熱交換器基部４に連結するアル
ミニウム製配管２とステンレス鋼製連結筒体３の他端部
とをろう付けして、黄銅製継手１とアルミニウム製配管
２とを間隔Ａをおいて連結する。
(57) [Summary] [Purpose] To improve corrosion resistance and joint strength in a heat exchanger equipped with a brass joint and aluminum piping connected to the base of the heat exchanger. [Structure] A brass joint 1 and one end of a stainless steel connecting cylinder 3 are brazed. The aluminum pipe 2 connected to the heat exchanger base 4 and the other end of the stainless steel connecting cylinder 3 are brazed to connect the brass joint 1 and the aluminum pipe 2 with a gap A between them.
Description
【０００１】0001
この考案はアルミニウム製熱交換器に関するもので、更に詳細には、黄銅製継 手と、熱交換器基部に連結されるアルミニウム製配管とを具備する熱交換器の改 良に係るものである。 This invention relates to aluminum heat exchangers, and more specifically, brass joints. Modification of a heat exchanger with a hand and aluminum piping connected to the base of the heat exchanger. It is related to good quality.
【０００２】0002
従来のこの種の熱交換器においては、図４に示すように熱交換器基部ａ側に接 続するアルミニウム製連結用パイプｂと、黄銅製継手ｃ側に接続する銅製連結用 パイプｄとを突合わせて抵抗溶接すなわちフラッシュバット溶接するか、あるい はアルミニウム製連結用パイプと銅製連結用パイプのいずれか一方の端部を拡管 し、そして、Ａｌ−Ｚｎ系等の半田を用い、超音波振動を付与しつつ半田材を活 性化させて半田付けする超音波半田付けを行っている。また、アルミニウム製熱 交換器基部ａを炉中ろう付けにて各部品の接合すなわち熱交換器基部ａに接続さ れるアルミニウム製パイプｅを炉中で同時にろう付けしている。更に、黄銅製継 手ｃと銅製パイプｆとを銀ろうを用いてろう付けすると共に、銅製パイプｆと銅 製連結用パイプｄとを銀ろうを用いてろう付けし、アルミニウム製連結用パイプ ｂとアルミニウム製パイプｅとをろう付けして、熱交換器を製造している。 In the conventional heat exchanger of this type, as shown in Fig. 4, there is a Connecting aluminum connecting pipe b and copper connecting pipe connecting to brass fitting c side You can do resistance welding (flash butt welding) with pipe d, or Expand one end of either the aluminum connecting pipe or the copper connecting pipe. Then, using solder such as Al-Zn, the solder material is activated while applying ultrasonic vibration. We perform ultrasonic soldering, which involves sexualizing soldering. We also have aluminum heat The exchanger base a is joined to the heat exchanger base a by furnace brazing. At the same time, aluminum pipes e are brazed in the furnace. In addition, brass fittings The hand c and the copper pipe f are brazed using silver solder, and the copper pipe f and the copper The aluminum connecting pipe d is brazed with silver solder, and the aluminum connecting pipe d is soldered using silver solder. A heat exchanger is manufactured by brazing pipe b and aluminum pipe e.
【０００３】0003
しかしながら、従来のこの種の熱交換器においては、フラッシュバット溶接の 場合では、アルミニウムと銅との接合部においてアルミニウム部分に優先的に電 気化学的腐食が生じるため、エポキシ系樹脂塗料等で外部雰囲気から遮断する保 護被膜が不可欠であった。また、接合面が小さいため、衝撃に対して脆いという 問題があり、継手部で内面への突出が生じるため、部分的に内径減少が生じ、更 には、加工後のバリ取りが必要であるため、工程が繁雑となるという問題があっ た。また、超音波半田付けの場合には、アルミニウムと銅との接合部で半田部分 が最も陽極となるため、電気化学的腐食を生じ、半田部分を通じて内部と外部が 貫通するという問題があった。 However, in conventional heat exchangers of this type, flash butt welding In some cases, electricity is preferentially applied to the aluminum part at the aluminum-to-copper junction. Because vapor chemical corrosion occurs, protect it from the external atmosphere with epoxy resin paint, etc. A protective coating was essential. In addition, because the joint surface is small, it is said to be brittle against impact. There is a problem in that the joint protrudes toward the inner surface, resulting in a partial reduction in the inner diameter and There is the problem that deburring is required after processing, which makes the process complicated. Ta. In addition, in the case of ultrasonic soldering, the solder part at the joint between aluminum and copper is the most anode, causing electrochemical corrosion, and the inside and outside are connected through the solder part. There was a problem with penetration.
【０００４】 これに加えて、アルミニウムと銅との接合構造では長尺の物は製造できないと いう欠点がある。したがって、アルミニウムと銅との接合に加えて、接合部側の アルミニウム製連結用パイプｂと熱交換器基部側のアルミニウム製パイプｅとの 接合、接合側の銅製連結用パイプｄと黄銅製継手ｃに連結される銅製パイプｆと の接合及び銅製パイプｆと黄銅製継手ｃとの接合が必要となり、構成部材が多く なると共に、作業工程が増大するという問題もあった。0004 In addition to this, long objects cannot be manufactured using a bonded structure of aluminum and copper. There is a drawback. Therefore, in addition to joining aluminum and copper, Between the aluminum connecting pipe b and the aluminum pipe e on the base side of the heat exchanger Joining, the copper connecting pipe d on the joining side and the copper pipe f connected to the brass fitting c. It is necessary to connect the copper pipe f and the brass joint c, and there are many components. At the same time, there was also the problem that the number of work steps increased.
【０００５】 更に、銅製連結用パイプｄとアルミニウム製連結用パイプｂの接合部はアルミ ニウム−銅の共晶組織、又は半田であっていずれも低融点であるので、熱交換器 基部のろう付け時に炉内へ投入することができないため、熱交換器基部のろう付 け後に別工程で接合しなければならないという問題もあった。また、アルミニウ ム−銅の低融点の共晶組織では接合時の熱によって共晶組織の層が厚くなり易い ため、共晶組織の層を厚くしないためにごく短時間での接合としたり、上記のよ うなフラッシュバット溶接を行ったり、ろう付けでない半田付けで接合しなけれ ばならなかった。[0005] Furthermore, the joint between the copper connecting pipe d and the aluminum connecting pipe b is made of aluminum. It is a eutectic structure of Ni-Copper or solder, both of which have low melting points, so they are suitable for heat exchangers. Brazing the base of the heat exchanger is not possible because it cannot be put into the furnace when brazing the base. There was also the problem that they had to be joined in a separate process after the bonding. Also, aluminum In the low melting point eutectic structure of mu-copper, the eutectic structure layer tends to thicken due to the heat during bonding. Therefore, in order not to thicken the eutectic structure layer, bonding is performed in a very short time, or as described above. Do not perform flash butt welding or use soldering instead of brazing. I had to.
【０００６】 この考案は上記事情に鑑みなされたもので、少ない部材で簡単に接合でき、し かも、耐蝕性及び強度の向上が図れるようにした熱交換器を提供することを目的 とするものである。[0006] This idea was created in view of the above circumstances, and can be easily joined with a small number of parts. The purpose of the present invention is to provide a heat exchanger with improved corrosion resistance and strength. That is.
【０００７】[0007]
上記目的を達成するために、この考案の熱交換器は、黄銅製継手と、熱交換器 基部に連結されるアルミニウム製配管とを具備する熱交換器を前提とし、上記黄 銅製継手とステンレス鋼製連結筒体の一端部とをろう付けすると共に、上記アル ミニウム製配管とステンレス鋼製連結筒体の他端部とをろう付けして、上記黄銅 製継手とアルミニウム製配管とを間隔をおいて連結してなるものである。 In order to achieve the above purpose, the heat exchanger of this invention uses brass fittings and a heat exchanger. Assuming a heat exchanger equipped with aluminum piping connected to the base, the above yellow While brazing the copper fitting and one end of the stainless steel connecting cylinder, Braze the minium pipe and the other end of the stainless steel connecting cylinder, and It is made by connecting a manufactured joint and an aluminum pipe at intervals.
【０００８】 この考案において、上記黄銅製継手とアルミニウム製配管とは間隔をおいて連 結されていればよく、例えばステンレス鋼製連結筒体の両端部にそれぞれ黄銅製 継手とアルミニウム製配管とをろう付けして両者間に間隔を設けるようにしても よく、あるいはステンレス鋼製連結筒体の中間部に間隔保持用の鍔部を設けて、 この鍔部によって黄銅製継手とアルミニウム製配管との間に間隔を設けるように してもよい。[0008] In this design, the brass fitting and aluminum pipe are connected at intervals. For example, a brass connection tube may be attached to both ends of the stainless steel connection cylinder. Even if you braze the fitting and aluminum piping to create a space between them, Or, by providing a flange for spacing in the middle of the stainless steel connecting cylinder, This flange creates a space between the brass fitting and the aluminum pipe. You may.
【０００９】 上記黄銅製継手とステンレス鋼製連結筒体とのろう付けは銀ろうを用いたろう 付けにより行うことができ、また、上記アルミニウム製配管とステンレス鋼製連 結筒体とのろう付けはフッ化物系非腐食性フラックス及びシリコン（Ｓｉ）７〜 １３％含有のＡｌ−Ｓｉ系ろう材を用いてろう付けすることができる。この場合 、アルミニウム製熱交換器基部を非腐食性フラックスを用いて、非酸化性雰囲気 中でろう付けすると同時に、アルミニウム製配管とステンレス鋼製連結筒体のろ う付けを行うことも可能である。[0009] The above brass fitting and stainless steel connecting cylinder are brazed using silver solder. This can be done by attaching the above aluminum piping and stainless steel connection. Brazing with the cylinder is done using fluoride non-corrosive flux and silicon (Si) 7~ Brazing can be performed using an Al-Si brazing filler metal containing 13%. in this case , the aluminum heat exchanger base was placed in a non-oxidizing atmosphere using a non-corrosive flux. At the same time as brazing inside, the aluminum piping and stainless steel connecting cylinder are It is also possible to attach it.
【００１０】0010
上記のように構成されるこの考案の熱交換器によれば、黄銅製継手とステンレ ス鋼製連結筒体の一端部とをろう付けすると共に、アルミニウム製配管とステン レス鋼製連結筒体の他端部とをろう付けして、黄銅製継手とアルミニウム製配管 とを間隔をおいて連結することにより、ステンレス鋼の不動態化によって塩分を 含まない通常の雰囲気での腐食を防止することができる。また、アルミニウムと ステンレス鋼との接合界面ではアルミニウム−銅の組合わせのような低融点の共 晶組織とはならず、また、黄銅とステンレス鋼を銀ろうでろう付けした場合は脆 い組織は生じないため、継手強度が向上する。 According to the heat exchanger of this invention constructed as described above, brass fittings and stainless steel are used. At the same time, the aluminum piping and the stainless steel connecting cylinder are brazed together. Braze the other end of the stainless steel connecting cylinder to the brass fitting and aluminum piping. By connecting them at intervals, the passivation of stainless steel eliminates salt content. Corrosion can be prevented in normal atmospheres that do not contain Also, aluminum and At the bonding interface with stainless steel, a low melting point material such as an aluminum-copper combination is used. It does not form a crystalline structure, and when brass and stainless steel are brazed with silver solder, they become brittle. Since no hard tissue is formed, joint strength is improved.
【００１１】[0011]
以下にこの考案の実施例を図面に基いて説明する。 Examples of this invention will be described below based on the drawings.
【００１２】 ◎第一実施例 図１はこの考案の熱交換器の第一実施例の継手部の側面図、図２は図１の要部 拡大断面図が示されている。0012 ◎First example Figure 1 is a side view of the joint part of the first embodiment of the heat exchanger of this invention, and Figure 2 is the main part of Figure 1. An enlarged cross-sectional view is shown.
【００１３】 この考案の熱交換器は黄銅製継手１（以下に継手という）と、熱交換器基部４ に連結されるアルミニウム製配管２（以下に配管という）とを具備し、これら継 手１と配管２とをステンレス鋼製連結筒体３（以下に連結筒体という）にて連結 すると共に、継手１と配管２との間に表面積を得るための間隔Ａを設けてなる。[0013] The heat exchanger of this invention has a brass joint 1 (hereinafter referred to as the joint) and a heat exchanger base 4. aluminum piping 2 (hereinafter referred to as piping) connected to the Connect the hand 1 and the pipe 2 with a stainless steel connecting cylinder 3 (hereinafter referred to as the connecting cylinder) At the same time, a gap A is provided between the joint 1 and the pipe 2 to obtain a surface area.
【００１４】 この場合、継手１は、例えば直径９．５３mm用のフレア継手で、快削黄銅（Ｃ ３６０４）が使用され、配管２は、外径が９．５３mm、肉厚が１．０mmのアルミ ニウム（Ａ１０５０）が使用され、連結筒体３は外径９．５３mm、長さが２０mm 、肉厚が０．８mmの円筒状ステンレス鋼（ＳＵＳ３０４）が使用される。[0014] In this case, the joint 1 is a flare joint with a diameter of 9.53 mm, for example, and is made of free-cutting brass (C). 3604) is used, and the pipe 2 is made of aluminum with an outer diameter of 9.53 mm and a wall thickness of 1.0 mm. aluminum (A1050) is used, and the connecting cylinder 3 has an outer diameter of 9.53 mm and a length of 20 mm. A cylindrical stainless steel (SUS304) with a wall thickness of 0.8 mm is used.
【００１５】 上記のように形成される継手１と配管２とを連結筒体３を介して接合するには 、まず、連結筒体３と継手１の内部に不活性ガスを流しながら銀含有量３０％以 上の銀ろうを用いてろう付けする。ここで、連結筒体３と継手１の内部に不活性 ガスを流す理由は、継手１を大気中でろう付けすると、黄銅表面にスマットが生 じるので、配管内面に不活性ガスを流して清浄度を保つようにするためである。 また、継手１と連結筒体３とを銀ろうでろう付けした場合は、脆い組織は生じな いので、継手強度が向上する。次に、熱交換器基部４に連結する配管２と連結筒 体３の接合部にＳｉ７〜１３％含有のＡｌ−Ｓｉ系ろう材を置きろうし、フッ化 物系非腐食性フラックスを用いてトーチろう付けして、継手１と配管２との間に 間隔Ａをおいて連結することにより、熱交換器を製造することができる。したが って、構成部材の削減が図れるので、製造作業が容易となる。[0015] To join the joint 1 and the pipe 2 formed as described above via the connecting cylinder 3 First, while flowing an inert gas inside the connecting cylinder 3 and the joint 1, the silver content is 30% or more. Braze using the silver solder above. Here, an inert The reason for flowing gas is that if fitting 1 is brazed in the atmosphere, smut will form on the brass surface. This is to maintain cleanliness by flowing inert gas inside the pipes. Furthermore, if the joint 1 and the connecting cylinder 3 are brazed with silver solder, no brittle structure will occur. This improves joint strength. Next, the piping 2 connected to the heat exchanger base 4 and the connecting tube Place an Al-Si brazing filler metal containing 7 to 13% Si at the joint of body 3, and Torch braze using non-corrosive flux to connect fitting 1 and pipe 2. By connecting them at a distance A, a heat exchanger can be manufactured. However, As a result, the number of structural members can be reduced, making manufacturing work easier.
【００１６】 また、別の製造工程として、上記と同様な材質によって形成される継手１と連 結筒体３の内部に不活性ガスを流しながら銀含有量３０％以上の銀ろうを用いて ろう付けした後、配管２と連結筒体３の接合部にＳｉ７〜１３％含有のＡｌ−Ｓ ｉ系ろう材を置きろうし、フッ化物系非腐食性フラックスを用いて熱交換器基部 ４のろう付けと同時に、窒素雰囲気中で約６００〜６２０℃の温度下で保持時間 約５分でろう付けすることもできる。このようにフッ化物系非腐食性フラックス を用いたろう付けを非酸化性雰囲気の炉中で行うことにより、継手の表面の清浄 度が保たれるので、炉中ろう付け後の洗浄等が不要となり、作業効率を向上させ ることができる。[0016] In addition, as another manufacturing process, a joint 1 made of the same material as above is connected. Using silver solder with a silver content of 30% or more while flowing an inert gas inside the tube body 3, After brazing, Al-S containing 7 to 13% Si is applied to the joint between the pipe 2 and the connecting cylinder 3. Place I-based brazing filler metal and use fluoride-based non-corrosive flux to heat exchanger base. At the same time as brazing in step 4, hold time at a temperature of approximately 600 to 620°C in a nitrogen atmosphere. It can also be brazed in about 5 minutes. In this way, fluoride-based non-corrosive flux By performing brazing using a non-oxidizing atmosphere in a furnace, the surface of the joint can be cleaned. Since the temperature is maintained, there is no need for cleaning after brazing in the furnace, improving work efficiency. can be done.
【００１７】 ◎第二実施例 図３はこの考案の熱交換器の第二実施例の要部拡大断面図が示されている。[0017] ◎Second example FIG. 3 shows an enlarged sectional view of the main parts of a second embodiment of the heat exchanger of this invention.
【００１８】 第二実施例における熱交換器は、連結筒体３の中間部に間隔保持用の鍔部５を 設けて、鍔部５に当接した状態で継手１、配管２をろう付けして、継手１と配管 ２に表面積を得るための間隔Ａを設けるようにした場合である。このように構成 することにより、間隔保持が確実となると共に、更に強度を向上することができ る。なお、図３において、その他の部分は上記実施例と同じであるので、同一部 分には同一符号を付して、その説明は省略する。[0018] The heat exchanger in the second embodiment has a flange 5 for maintaining distance in the middle part of the connecting cylinder 3. Braze the fitting 1 and the piping 2 while they are in contact with the flange 5, and then connect the fitting 1 and the piping. This is a case in which a distance A is provided in order to obtain a surface area. Configure like this By doing so, it is possible to ensure the spacing and further improve the strength. Ru. In addition, in FIG. 3, other parts are the same as those in the above embodiment, so the same parts The same reference numerals are given to the parts, and the explanation thereof will be omitted.
【００１９】 次に、この考案の熱交換器と従来の熱交換器の腐食に関する実験について説明 する。[0019] Next, we will explain experiments regarding corrosion of the heat exchanger of this invention and conventional heat exchangers. do.
【００２０】 実験条件 本考案：第一実施例で説明した構造のアルミニウム−黄銅製継手の接合部 従来例：アルミニウム−銅のフラッシュバット溶接品 従来例：アルミニウム−銅の超音波半田付け品 を塩水噴霧試験（ＳＳＴ）（ＪＩＳ Ｚ２３７１）により耐蝕性の比較を行った ところ、保護被覆の全くない状態では、表１に示すような結果が得られ、また、 エポキシ系樹脂塗料で被覆した場合には、表２に示すような結果が得られた。[0020] Experimental conditions Present invention: Joint part of aluminum-brass joint with the structure explained in the first embodiment Conventional example: Aluminum-copper flash butt welded product Conventional example: Aluminum-copper ultrasonic soldered product Corrosion resistance was compared using salt spray test (SST) (JIS Z2371). However, in the absence of any protective coating, the results shown in Table 1 were obtained, and When coating with epoxy resin paint, the results shown in Table 2 were obtained.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【表２】 [Table 2]
【００２３】 また、この考案の熱交換器において継手１と配管２との間隔Ａを例えば７mm、 １０mm、１３mmと変えて塩水噴霧試験（ＳＳＴ）（ＪＩＳ Ｚ２３７１）を行っ たところ、表３に示すような結果が得られた。なお、この場合、保護被覆のない 状態で試験を行った。[0023] In addition, in the heat exchanger of this invention, the distance A between the joint 1 and the pipe 2 is, for example, 7 mm. Salt spray test (SST) (JIS Z2371) was conducted with 10mm and 13mm. As a result, the results shown in Table 3 were obtained. In this case, if there is no protective coating, The test was conducted under the condition.
【００２４】[0024]
【表３】 [Table 3]
【００２５】 上記試験の結果、アルミニウム部分と銅部分をステンレスを介して間隔をおい たこの考案における継手は、間隔が大きい程耐蝕性に対する効果は大きいが、実 用上、間隔Ａは１０mm以上が好ましいことが判明した。[0025] As a result of the above test, the aluminum part and the copper part were separated by using stainless steel. The joints devised by Tako have a greater effect on corrosion resistance as the spacing becomes larger, but in practice For practical purposes, it has been found that the distance A is preferably 10 mm or more.
【００２６】[0026]
以上に説明したようにこの考案の熱交換器によれば、黄銅製継手とステンレス 鋼製連結筒体の一端部とをろう付けすると共に、アルミニウム製配管とステンレ ス鋼製連結筒体の他端部とをろう付けして、黄銅製継手とアルミニウム製配管と を間隔をおいて連結してなるので、ステンレス鋼の不動態化により耐蝕性が向上 する。また、アルミニウムと銅の組合わせのような低融点の共晶組織にはならな いので、継手強度の向上を図ることができる。更に、構成部材の削減が図れるの で、製造作業が容易となり、かつ低廉な熱交換器を提供することができる。 As explained above, the heat exchanger of this invention has brass fittings and stainless steel fittings. One end of the steel connecting cylinder is brazed, and the aluminum piping and stainless steel Braze the other end of the steel connecting cylinder and connect the brass fitting and aluminum piping. Since the stainless steel is connected at intervals, corrosion resistance is improved due to the passivation of the stainless steel. do. Also, it does not form a low melting point eutectic structure like the combination of aluminum and copper. Therefore, the strength of the joint can be improved. Furthermore, the number of component parts can be reduced. This makes it possible to provide an inexpensive heat exchanger that is easy to manufacture.
【図１】この考案の熱交換器の第一実施例の継手部を示
す概略側面図である。FIG. 1 is a schematic side view showing a joint portion of a first embodiment of a heat exchanger of this invention.
【図２】図１の要部拡大断面図である。FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1;
【図３】この考案の第二実施例の実施例を示す要部拡大
断面図である。FIG. 3 is an enlarged sectional view of a main part showing a second embodiment of the invention.
【図４】従来の熱交換器の継手部を示す概略側面図であ
る。FIG. 4 is a schematic side view showing a joint portion of a conventional heat exchanger.
１ 黄銅製継手 ２ アルミニウム製配管 ３ ステンレス鋼製連結筒体 ４ 熱交換器基部 ５ 鍔部 1 Brass fittings 2 Aluminum piping 3 Stainless steel connecting cylinder 4 Heat exchanger base 5 Tsubabe
Claims (2)
るアルミニウム製配管とを具備する熱交換器において、
上記黄銅製継手とステンレス鋼製連結筒体の一端部とを
ろう付けすると共に、上記アルミニウム製配管とステン
レス鋼製連結筒体の他端部とをろう付けして、上記黄銅
製継手とアルミニウム製配管とを間隔をおいて連結して
なることを特徴とする熱交換器。[Claim 1] A heat exchanger comprising a brass joint and an aluminum pipe connected to a heat exchanger base,
The brass fitting and one end of the stainless steel connecting tube are brazed together, and the aluminum piping and the other end of the stainless steel connecting tube are brazed to each other, so that the brass fitting and the aluminum tube are brazed together. A heat exchanger characterized by being formed by connecting pipes at intervals.
ンレス鋼製連結筒体に間隔保持用の鍔部を形成してなる
ことを特徴とする熱交換器。2. The heat exchanger according to claim 1, characterized in that the stainless steel connecting cylinder is formed with a flange portion for maintaining a distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5224391U JPH0722623Y2 (en) | 1991-06-12 | 1991-06-12 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5224391U JPH0722623Y2 (en) | 1991-06-12 | 1991-06-12 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04138587U true JPH04138587U (en) | 1992-12-25 |
| JPH0722623Y2 JPH0722623Y2 (en) | 1995-05-24 |
Family
ID=31928684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5224391U Expired - Lifetime JPH0722623Y2 (en) | 1991-06-12 | 1991-06-12 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0722623Y2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666488A (en) * | 1992-06-17 | 1994-03-08 | Mitsubishi Electric Corp | Plate type heat exchanger and its manufacturing method |
| JP2007023311A (en) * | 2005-07-13 | 2007-02-01 | Showa Denko Kk | Clad material and manufacturing method therefor |
| JP2010203662A (en) * | 2009-03-03 | 2010-09-16 | Nikkei Nekko Kk | Piping structure for heat exchanger |
| JP2012000645A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| JP2012000643A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| JP2012000644A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| JP2014129997A (en) * | 2012-11-30 | 2014-07-10 | Denso Corp | Heat exchanger structure |
| CN115090979A (en) * | 2022-05-17 | 2022-09-23 | 成都海光核电技术服务有限公司 | Brazing method of thick-wall copper pipe |
| CN115667819A (en) * | 2020-05-21 | 2023-01-31 | 大金工业株式会社 | Pressure vessel and refrigeration device |
-
1991
- 1991-06-12 JP JP5224391U patent/JPH0722623Y2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666488A (en) * | 1992-06-17 | 1994-03-08 | Mitsubishi Electric Corp | Plate type heat exchanger and its manufacturing method |
| JP2007023311A (en) * | 2005-07-13 | 2007-02-01 | Showa Denko Kk | Clad material and manufacturing method therefor |
| JP2010203662A (en) * | 2009-03-03 | 2010-09-16 | Nikkei Nekko Kk | Piping structure for heat exchanger |
| JP2012000645A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| JP2012000643A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| JP2012000644A (en) * | 2010-06-17 | 2012-01-05 | Fuji Electric Co Ltd | Joining method of aluminum pipe and copper pipe, joining structure and heat exchanger having the joining structure |
| JP2014129997A (en) * | 2012-11-30 | 2014-07-10 | Denso Corp | Heat exchanger structure |
| CN115667819A (en) * | 2020-05-21 | 2023-01-31 | 大金工业株式会社 | Pressure vessel and refrigeration device |
| CN115090979A (en) * | 2022-05-17 | 2022-09-23 | 成都海光核电技术服务有限公司 | Brazing method of thick-wall copper pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0722623Y2 (en) | 1995-05-24 |
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