JPH03114661A - Heat exchanger - Google Patents
Heat exchangerInfo
- Publication number
- JPH03114661A JPH03114661A JP24066689A JP24066689A JPH03114661A JP H03114661 A JPH03114661 A JP H03114661A JP 24066689 A JP24066689 A JP 24066689A JP 24066689 A JP24066689 A JP 24066689A JP H03114661 A JPH03114661 A JP H03114661A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- alloy
- brazing
- pipe
- weight
- 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.)
- Pending
Links
- 238000005219 brazing Methods 0.000 claims abstract description 30
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 11
- 239000000945 filler Substances 0.000 abstract description 7
- 229910021364 Al-Si alloy Inorganic materials 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011162 core material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910018125 Al-Si Inorganic materials 0.000 description 1
- 229910018520 Al—Si Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 101100313164 Caenorhabditis elegans sea-1 gene Proteins 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Laminated Bodies (AREA)
Abstract
Description
本発明は、例えば自動車用ラジェータやエアコンのコン
デンサ、エバポレータ等に用いられるΔ１製の熱交換器
に関するものである。The present invention relates to a heat exchanger made of Δ1 used, for example, in automobile radiators, air conditioner condensers, evaporators, and the like.
例えば押出管とフィン、管とヘッダーといった接合箇所
が多く、しかも接合部が複雑な形状となっている熱交換
器は、従来にあっては、Ａｌ合金の芯材にＡｌ−Ｓｉ合
金ろう材をクラッドしたプレージングシートで熱交換器
材料を構成し、これをろう付けによって接合して製造し
ていた。
この方法は、−度の加熱によって複雑なコア部が完全に
接合されることから、生産性に優れており、実用上有用
なものであった。
しかしながら、例えばフィンのような薄肉の材料にプレ
ージングシートを用いると、ろう付は加熱時に材料表面
のろうが母材に侵入し、材料の高温での変形抵抗を著し
く低下させ、自重で容易に変形（垂下）が起きる為に所
望の形状を保てなくなり、このことから場合によっては
接合強度をも悪くする。
又、ろう付は部に対しては必要最小量のろうを供給する
のが好ましいという観点から望ましいものではなく、す
なわちろう付は部具外の不要な部分にも耐食性に劣るろ
うが無視出来ない程あり、この為この部分の耐食性が劣
る。すなわち、Ａｌ−Ｓｉ舎金ろうはＪＩＳ １０５０
等の純へ１に対して電気化学的に責であり、管やフィン
に純Ａｌが用いられるとこれらの材料の腐食が促進され
、比較的早期のうちに貫通孔が形成され、熱媒体漏れが
引き起こされるようになる。
このようなことから、管の表面にＺｎを付着させ、管の
耐食性を上げることが試みられているが、必ずしも好ま
しい結果は達成されていない。For example, heat exchangers have many joints such as extruded pipes and fins, or pipes and headers, and the joints have complicated shapes. Conventionally, heat exchangers have an Al-Si alloy core material and an Al-Si alloy brazing material. The heat exchanger material was made of clad plating sheets, which were then joined together by brazing. This method has excellent productivity and is practically useful because the complex core portions can be completely joined by heating at -degrees. However, if a plating sheet is used for a thin material such as a fin, the solder on the surface of the material will penetrate into the base material during heating, significantly reducing the deformation resistance of the material at high temperatures, and the brazing will easily occur due to its own weight. Due to deformation (sagging), the desired shape cannot be maintained, which may deteriorate the bonding strength in some cases. In addition, brazing is not desirable from the viewpoint that it is preferable to supply the minimum amount of solder to a part; in other words, brazing also applies to unnecessary parts outside of the part, since the wax, which has poor corrosion resistance, cannot be ignored. Therefore, the corrosion resistance of this part is poor. In other words, Al-Si metal solder is JIS 1050
When pure Al is used for tubes and fins, corrosion of these materials is accelerated, and through holes are formed relatively early, leading to heating medium leakage. begins to be triggered. For this reason, attempts have been made to increase the corrosion resistance of the tube by attaching Zn to the surface of the tube, but favorable results have not necessarily been achieved.
本発明の第１の目的は、ろう付けによって熱交換器の部
材に変形が起きず、これによる接合強度の低下がない熱
交換器を提供することである。
本発明の第２の目的は、多くのろうが不必要な部分に付
かず、耐食性の低下がない熱交換器を提供することであ
る。
上記本発明の目的は、フィンと０．０５〜０．７重量％
のＣｕ及び０．１〜１．２重量％のＨｎの中から選ばれ
る一つ以上を含有する４１合金製の管とを備えてなる熱
交換器であって、この熱交換器のコア部の接合は１０〜
２００μ輸の径のＡｌ−Ｓｉ系合金ろう粉末がバインダ
を用いて塗布され、加熱ろう付けされることによって行
われたものであることを特徴とする熱交換器によって達
成される。
すなわち、本発明者は、ブレージングシー１〜を用いた
熱交換器のろう付は中における部材の変形、ろう付は性
紙下、及び耐食性の問題を解決すべく種々検討した結果
、＾ｌ−５ｉ系ろう材を粉末とし、この粉末とバインダ
との混合物を接合部（接合部近傍も含む）にのみ塗布し
、管やヘッダーとの接合を図る熱交換器において、この
熱交換器の管が０．０５〜０．７重量％のＣｕ及び０．
１〜１．２重量％のＭｎの中から選ばれる一つ以上を含
有するＡｌ合金製のものであると、表面にＺｎがなくて
も耐食性が一段と向上することを見出し、これに基づい
て本発明が完成されたのである。
本発明の熱交換器はフッ化物や塩化物等従来のフラック
スろう付は法を適用することで得られるものであり、ろ
う中のＳｉ含有量は例えば７〜１２重量％である。そし
て、ろう付は温度はろうの溶融温度の５８０〜６３０℃
とした。
ろう粉末の径は１０μＩｎ未満の小さすぎる場合では、
粉末の表面積が大きくなり、酸化物量が多く＝４
なって、ろう付は性に劣るばかりでなく、微粉末で取り
扱いが難しく、逆に、２００μｍを越えて大きすぎると
、材料面、特に屈曲部に薄く、均一に塗布することがで
きなくなるから１０〜２００μｍとすることが大事であ
る。そして、上記のろう合金粉末は組成のバラツキが少
なく、かつ、微細で、ろう付は温度で容易に溶融し、優
れたろう付は性が確保できるようになる。
管にＣｕ又はＭｎを含有するＡｌ合金材を用いるのは、
従来用いられてきた純ＡＩがろう材より電気化学的に卑
であり、ろう材が腐食した場合に管の侵食が激しくなる
ことを防止することによる。すなわちＣｕ＋ＭｎはＡ１
合金を電気化学的に責にし、この材料を用いることによ
って管がろうより責になり、ろうが管に対して犠牲陽極
的に働く結果、侵食を阻止できるようになるからである
。
ここでＣｕが０．０５重量％未満の少なすぎる場合では
上記効果が十分でなく、逆に、０．７重量％を越えて多
く含有されても一層の効果が発揮されるものではなく、
材料そのものの耐食性が劣化するから、Ｃｕの含有量は
０．０５重量％〜０．７重量％の範囲内であることが大
事である。
又、Ｍｎが０．１重量％未満の少なすぎる場合では上記
効果が十分でなく、逆に、１．２重量％を越えて多く含
有されても一層の効果が発揮されるものではなく、押出
性が悪くなり、材料の生産性が低下するから、Ｍｎの含
有量は０．１重量％〜１．２重量％の範囲内であること
が大事である。A first object of the present invention is to provide a heat exchanger in which the members of the heat exchanger are not deformed by brazing and the joint strength is not reduced due to this. A second object of the present invention is to provide a heat exchanger in which a large amount of wax is not attached to unnecessary parts and the corrosion resistance is not deteriorated. The object of the present invention is to combine fins with 0.05 to 0.7% by weight.
41 alloy tube containing at least one selected from Cu and 0.1 to 1.2% by weight of Hn, the core of the heat exchanger Junction is 10~
This is achieved by a heat exchanger characterized in that an Al-Si alloy brazing powder having a diameter of 200 μm is coated with a binder and heated and brazed. That is, the inventor of the present invention has conducted various studies to solve the problems of deformation of the members inside, brazing under the adhesive paper, and corrosion resistance when brazing a heat exchanger using Brazing Sea 1~. In a heat exchanger in which 5i brazing filler metal is powdered and a mixture of this powder and a binder is applied only to the joints (including the vicinity of the joints), the pipes of this heat exchanger are connected to pipes and headers. 0.05-0.7% by weight of Cu and 0.05% to 0.7% by weight of Cu
It was discovered that corrosion resistance is further improved even without Zn on the surface when it is made of an Al alloy containing one or more selected from 1 to 1.2% by weight of Mn, and based on this, this book was developed. The invention was completed. The heat exchanger of the present invention is obtained by applying a conventional flux brazing method using fluoride, chloride, etc., and the Si content in the brazing is, for example, 7 to 12% by weight. The temperature for brazing is 580-630℃ which is the melting temperature of the wax.
And so. If the diameter of the wax powder is too small, less than 10μIn,
The surface area of the powder becomes large and the amount of oxides becomes large = 4, which not only results in poor brazing properties but also makes it difficult to handle as the powder is fine. It is important to set the thickness to 10 to 200 μm because it will not be possible to apply the film thinly and uniformly. The above-mentioned brazing alloy powder has little variation in composition and is fine, so it can be easily melted at a high temperature for brazing, and excellent brazing properties can be ensured. Using an Al alloy material containing Cu or Mn for the tube is
This is because the pure AI that has been used in the past is electrochemically less noble than the brazing filler metal, and prevents the tube from becoming more eroded when the brazing filler metal corrodes. That is, Cu+Mn is A1
This is because the alloy is electrochemically charged and the use of this material makes the tube more sensitive than the wax, and the wax acts as a sacrificial anode to the tube, thereby inhibiting erosion. Here, if the Cu content is too small, less than 0.05% by weight, the above effects will not be sufficient, and conversely, even if the content exceeds 0.7% by weight, further effects will not be exhibited.
Since the corrosion resistance of the material itself deteriorates, it is important that the Cu content is within the range of 0.05% to 0.7% by weight. In addition, if the Mn content is too small (less than 0.1% by weight), the above effects will not be sufficient, and conversely, even if the Mn content exceeds 1.2% by weight, further effects will not be exhibited, and the extrusion It is important that the content of Mn is within the range of 0.1% by weight to 1.2% by weight, since this results in poor properties and lowers the productivity of the material.
Ｃｕ、、Ｍｎを含有するＡ１合金の押出多穴管（０，５
＋ｎ＋ｎｔ）１とヘッダー用板２とを第１図のように組
み立て、多穴管の間に各種合金組成のフィン（０，］、
＋ｎ＋ｎｔ） ３を挿入した。尚、押出多穴管１の表面
又はフィン３の屈曲部には予め平均粒径３５μＩ１１の
Ａｌ−Ｓｉ系合金ろう材をアクリル系樹脂よりなるバイ
ンダを用いて塗布している。又、組立体における押出多
穴管１とヘッダー用板２との間には上記ろう材をスプレ
ーで塗布しな。
この第１図に示すような組立体にフッ化物系フラックス
をスプレーで塗布した後、窒素ガス雰囲気中で６００°
Ｃ１５分間保持の熱処理を行ってろう付けした。
このようにして得た熱交換器の耐食性を調べる為に７２
０時間のＣＡＳＳ試験を行ったので、これらの結果を表
１に示す。
７−
この表１より明らかなように本発明の熱交換器は、チュ
ーブの局部腐食が軽微である。
さらに、ろう付は時にフィンの変形がほとんどなく、チ
ューブとフィンの接合等も良好である。Extruded multi-hole tube of A1 alloy containing Cu, Mn (0,5
+n+nt) 1 and the header plate 2 are assembled as shown in Fig. 1, and fins (0,] of various alloy compositions are placed between the multi-hole tubes.
+n+nt) 3 was inserted. The surface of the extruded multi-hole tube 1 or the bent portion of the fin 3 is coated with an Al--Si alloy brazing material having an average particle diameter of 35 .mu.I11 in advance using a binder made of acrylic resin. Also, do not spray the brazing filler metal between the extruded multi-hole tube 1 and the header plate 2 in the assembly. After spraying fluoride flux on the assembly shown in Figure 1, it was heated at 600° in a nitrogen gas atmosphere.
Brazing was performed by heat treatment for 15 minutes. In order to investigate the corrosion resistance of the heat exchanger obtained in this way, 72
A 0-hour CASS test was conducted, and the results are shown in Table 1. 7- As is clear from Table 1, in the heat exchanger of the present invention, local corrosion of the tubes is slight. Furthermore, brazing causes almost no deformation of the fins, and the joint between the tube and the fins is also good.
第１図は、押出多穴管とヘッダー用板とフィンとの組立
図である。
１・・・押出多穴管、２・・・ヘッダー用板、３・・・
フィン。FIG. 1 is an assembly diagram of an extruded multi-hole tube, a header plate, and a fin. 1... Extruded multi-hole pipe, 2... Header plate, 3...
fin.
Claims (1)
．２重量％のＭｎの中から選ばれる一つ以上を含有する
Ａｌ合金製の管とを備えてなる熱交換器であって、この
熱交換器のコア部の接合は１０〜２００μｍの径のＡｌ
−Ｓｉ系合金ろう粉末がバインダを用いて塗布され、加
熱ろう付けされることによって行われたものであること
を特徴とする熱交換器。fins and 0.05-0.7% by weight of Cu and 0.1-1
．． A heat exchanger comprising a tube made of an Al alloy containing at least one selected from 2% by weight of Mn, the core of the heat exchanger being joined to an Al alloy tube with a diameter of 10 to 200 μm.
- A heat exchanger characterized in that the Si-based alloy brazing powder is coated with a binder and heated and brazed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24066689A JPH03114661A (en) | 1989-09-19 | 1989-09-19 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24066689A JPH03114661A (en) | 1989-09-19 | 1989-09-19 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03114661A true JPH03114661A (en) | 1991-05-15 |
Family
ID=17062896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24066689A Pending JPH03114661A (en) | 1989-09-19 | 1989-09-19 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03114661A (en) |
-
1989
- 1989-09-19 JP JP24066689A patent/JPH03114661A/en active Pending
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