JPH03138081A - Heat exchanger made of al alloy for equipment in air conditioner - Google Patents
Heat exchanger made of al alloy for equipment in air conditionerInfo
- Publication number
- JPH03138081A JPH03138081A JP26470189A JP26470189A JPH03138081A JP H03138081 A JPH03138081 A JP H03138081A JP 26470189 A JP26470189 A JP 26470189A JP 26470189 A JP26470189 A JP 26470189A JP H03138081 A JPH03138081 A JP H03138081A
- Authority
- JP
- Japan
- Prior art keywords
- flux
- heat exchanger
- brazing
- alloy
- air conditioner
- 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
- 229910000838 Al alloy Inorganic materials 0.000 title claims description 5
- 230000004907 flux Effects 0.000 claims abstract description 49
- 238000005219 brazing Methods 0.000 claims abstract description 37
- 230000009972 noncorrosive effect Effects 0.000 claims abstract description 14
- 238000004381 surface treatment Methods 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 239000012808 vapor phase Substances 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 230000008021 deposition Effects 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 description 16
- 239000000956 alloy Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 238000011282 treatment Methods 0.000 description 8
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011162 core material Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000005536 corrosion prevention Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000000945 filler Substances 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
- 239000000203 mixture Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910020239 KAlF4 Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910000674 AJ alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000914 Mn alloy Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 229910004074 SiF6 Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- FPHIOHCCQGUGKU-UHFFFAOYSA-L difluorolead Chemical compound F[Pb]F FPHIOHCCQGUGKU-UHFFFAOYSA-L 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、表面処理性に優れたエアコン室内機用Ａｌ合
金製熱交換器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an Al alloy heat exchanger for an indoor unit of an air conditioner that has excellent surface treatment properties.
Ａｌ’またはＡ１合金部材をこれらＡｌ等よりも融点の
低いろう材を介して固定して組立物とし、非腐食性フラ
ックスを塗布した後、このろう材の融点よりも高く、接
合しようとするＡｌまたはＡ１合金部材の融点よりも低
い温度に加熱することにより製造したＡ１合金製熱交換
器は、軽量性、熱電導性に優れるため、エアーコンディ
ショナーやその他各種の機器に用いられている。Al' or A1 alloy members are fixed together via a brazing filler metal whose melting point is lower than that of these Al, etc., and a non-corrosive flux is applied. Alternatively, A1 alloy heat exchangers manufactured by heating to a temperature lower than the melting point of the A1 alloy member are used in air conditioners and various other devices because they are lightweight and have excellent thermal conductivity.
上記のＡＪ合金製熱交換器は、ろう付は部表面の酸化皮
膜を除去するために用いられた非腐食性フラックスが、
ろう付は後接合部材の表面に残渣として多くかつ不均一
に残っている。非腐食性フラックスはＡｌに対して腐食
性がないため、ろう付は後除去する必要はないが、この
フラックス残渣のために、熱交換器からの放熱性が低下
し、またフラックスが非導電性であるため、犠牲フィン
により管体を保護する防食法を採用する熱交換器の場合
には防食電流の流れが阻害されしまい防食効果が十分得
られない。The above AJ alloy heat exchanger has a non-corrosive flux used to remove the oxide film on the surface of the brazed part.
A large amount of brazing residue remains unevenly on the surface of the joined member after the soldering. Non-corrosive flux is not corrosive to Al, so there is no need to remove it after brazing, but this flux residue reduces heat dissipation from the heat exchanger and also makes the flux non-conductive. Therefore, in the case of a heat exchanger that employs a corrosion prevention method in which the tube body is protected by sacrificial fins, the flow of the corrosion prevention current is inhibited, and a sufficient corrosion prevention effect cannot be obtained.
さらに、表面がフラックス残渣によって汚れ商品価値が
劣ると共に、耐食性を向上させるために次工程で行うク
ロメート処理、黒色塗装処理。In addition, the surface is contaminated with flux residue, reducing its commercial value, and chromate treatment and black painting are performed in the next process to improve corrosion resistance.
親水性処理等が不均一となってしまいその効果が十分に
発揮されなくなるという問題がある。There is a problem in that the hydrophilic treatment etc. becomes non-uniform and its effects are not fully exhibited.
家庭用、業務用などのエアコン室内機用熱交換器の場合
、腐食し腐食生成物の白粉を生じると、この白粉が室内
に飛散し儂康を害するなど重大な問題となる。そのため
、特に耐食性を向上させるための表面処理が不可欠であ
り、ろう付は後洗浄してフラックス残渣を除去し、表面
処理性を向上させなければならない。しかし、非腐食性
フラックスは水溶性でないため酸洗いなどを行わねばな
らず、工程が煩雑となるという問題がある。In the case of a heat exchanger for an indoor unit of an air conditioner for home or commercial use, if it corrodes and produces white powder as a corrosion product, this white powder will scatter indoors, causing serious problems such as harming one's health. Therefore, surface treatment is indispensable, especially to improve corrosion resistance, and after brazing, cleaning must be performed to remove flux residue and improve surface treatment properties. However, since non-corrosive flux is not water-soluble, it must be pickled, which makes the process complicated.
真空中に接合しようとする組立物を置いてろう付加熱す
る真空ろう骨法であれば、フラックスを使用しないので
、後工程として洗浄も不要であり、またろう骨接の部材
表面が清浄で表面処理性に優れるが、高真空が必要であ
ることから設備費が高くなることおよびろう付けする材
料に制約があるなどの問題がある。With the vacuum brazing method, which involves placing the assembly to be joined in a vacuum and adding heat to the solder, flux is not used, so there is no need for cleaning as a post-process, and the surfaces of the parts to be joined are clean and require surface treatment. However, there are problems such as high equipment costs due to the need for high vacuum and restrictions on the materials to be brazed.
ろう付は後のフラックス付着量が少ない熱交換器であれ
ば、表面の清浄性に起因する表面処理性の問題が解決す
るが、フラックスを表面に塗布してろう付けを行う従来
の熱交換器は、ろう付は前のフラックス塗布量が約５
ｇｌｒｄ以上でなければ健全なろう付けを行うことがで
きず、これらフラックスはろう付は時に流動して一部熱
交換器から離脱するものの、ろう付は後のフラックス残
渣量は約４ ｇ／ｒｒｒ以上と多い。If the heat exchanger has a small amount of flux attached after brazing, the problem of surface treatment due to the cleanliness of the surface can be solved, but conventional heat exchangers that apply flux to the surface and braze it For brazing, the amount of flux applied before was approximately 5
If the flux is not higher than glrd, it is not possible to perform sound brazing, and although these fluxes sometimes flow during brazing and partially separate from the heat exchanger, the amount of flux residue after brazing is approximately 4 g/rrr. There are many more than that.
本発明は、これに鑑み種々検討の結果、フラックスを熱
交換器に塗布することなく、フラックス蒸気が存在する
非酸化性雰囲気中でろう付けを行う気相ろう付は法によ
ってろう付けを行ったことにより、ろう付は後の熱交換
器表面のフラックス付着量が少なく、表面が清浄で表面
処理性に優れたエアコン室内機用Ａ１合金製熱交換器を
開発したものである。In view of this, as a result of various studies, the present invention has developed a method for vapor phase brazing in which brazing is performed in a non-oxidizing atmosphere in the presence of flux vapor without applying flux to the heat exchanger. As a result, we have developed an A1 alloy heat exchanger for indoor air conditioner units that has a clean surface and excellent surface treatment properties, with less flux adhesion on the surface of the heat exchanger after brazing.
即ち本発明熱交換器は、非腐食性フラックス蒸気が存在
する非酸化性雰囲気中でろう付けする気相ろう付けによ
りろう付けされたエアコン室内桟用Ａｌ合金製交換器に
おいて、表面の非腐食性フラックスの付着量をＱ、 ［
５〜０．６ｇ／ｄとしたことを特徴とするものである。That is, the heat exchanger of the present invention is an Al alloy exchanger for an air conditioner indoor frame that is brazed by vapor phase brazing in a non-oxidizing atmosphere in which non-corrosive flux vapor is present, and has a non-corrosive surface. The amount of flux attached is Q, [
It is characterized by being 5 to 0.6 g/d.
本発明において、ろう付は後の非腐食性フラックスの付
着量を０．Ｈ５〜０．６ｇ／ｒｒｆとしたのは、フラッ
クス付着量が下限以下となる気相ろう付は条件では、健
全なろう付けが行えないからであり、一方フラックス付
着量が上限以上では、表面の清浄性が悪くなり、後工程
での表面処理性が十分に満足できなくなるためである。In the present invention, brazing reduces the amount of non-corrosive flux deposited to 0. The reason for setting H5 to 0.6g/rrf is that sound brazing cannot be achieved under conditions where the amount of flux attached is below the lower limit, while on the other hand, if the amount of flux attached is above the upper limit, the surface This is because the cleanliness deteriorates and the surface treatment properties in the subsequent process become unsatisfactory.
ろう付は後のこれら非腐食性フラックスの付着量は、フ
ラックス蒸気分圧およびろう付は時間などにより制御さ
れ、フラックス蒸気分圧が高く、ろう付は時間が長いほ
どフラックス付着量は多くなる。The amount of non-corrosive flux deposited after brazing is controlled by the flux vapor partial pressure and brazing time, and the higher the flux vapor partial pressure and the longer the brazing time, the greater the amount of flux deposited.
本発明における気相ろう付は法に用いられる非腐食性フ
ラックス蒸気は、ＫＡｌ Ｆ４ 、に２Ａｌ Ｆ５やに
３Ａｌ Ｆ、、などの一般式ＫｎＡｌＦ ｎ＋３で示さ
れるフルオロアルミン酸カリウム錯体、Ｃ５ＡｌＦ４
、Ｃ８２ＡｌＦ３ 、Ｃ５ｔＡｌＦ６などの一般弐〇ｓ
、Ａｌ Ｆ、、で示されるフルオロアルミン酸セシウム
錯体、Ｉ＜ＢＦ４．ＫＺｎＦ３．ＫＳｎＦ３．に２Ｚｒ
Ｆ６に、ＳｉＦ６などの蒸気およびこれらの混合蒸気が
含まれる。これらフラックス蒸気は、上記組成のフラッ
クスを加熱蒸発させることにより生じるが、さらにＦＫ
＋ＡｌＦｇ 、ＣｓＦ＋Ａｌ Ｆ３ 、 ＫＦ十Ｚ ｒ
Ｆ４ ＋Ａｌ 、 ＫＦ＋Ｌ ｉＦ＋Ａ／、 ＫＦ
＋ＳｎＦ、 ＋Ａ Ｉ 、 ＫＦ＋ＺｎＦ４＋ＮａＦ
＋Ａｌ、ＬｉＦ＋ＮａＦ＋ＣｓＦ＋Ａ７！、ＬｉＦ＋Ｃ
ｓＦ＋ＡＪ、ＣｓＦ＋ＰｂＦ２ ＋Ａｌ、ＫＦ＋ＣｓＦ
＋Ａｌ、ＣｓＦ＋Ｚ ｒ Ｆ ４＋ Ａｌなどの混合物
を加熱溶融することにより反応生成物として発生させる
こともできる。The non-corrosive flux vapor used in the vapor phase brazing method of the present invention is a potassium fluoroaluminate complex represented by the general formula KnAlF n+3, such as KAlF4, 2AlF5, 3AlF, etc., C5AlF4
, C82AlF3, C5tAlF6, etc.
, Al F, fluoroaluminate cesium complex, I<BF4. KZnF3. KSnF3. ni2Zr
F6 includes vapors such as SiF6 and mixed vapors thereof. These flux vapors are produced by heating and evaporating fluxes having the above composition, and in addition, FK
+AlFg, CsF+AlF3, KF1Zr
F4 +Al, KF+L iF+A/, KF
+SnF, +AI, KF+ZnF4+NaF
+Al, LiF+NaF+CsF+A7! , LiF+C
sF+AJ, CsF+PbF2 +Al, KF+CsF
It can also be generated as a reaction product by heating and melting a mixture of +Al, CsF+Z r F 4+ Al, and the like.
これらフラックス蒸気の発生方法としては、フラックス
を炉内で加熱蒸発させる方法、フラックスを炉外で加熱
蒸発させ、窒素、アルゴンなどの非酸化性ガスと混合し
炉内に導入する方法などがあり、いずれの方法でも用い
ることができる。Methods for generating these flux vapors include heating and evaporating the flux inside the furnace, heating and evaporating the flux outside the furnace, mixing it with non-oxidizing gas such as nitrogen and argon, and introducing the mixture into the furnace. Either method can be used.
熱交換器に用いられるＡ１合金は、ろう材よりも融点が
高いものならばいずれでもよく、チューブ、プレート、
フィン状に加工されて用いられる。ろう材は、Ａｌ−３
ｉ系、ＡＪ −Ｚｎ系合金が使用され、その形状は板状
、線状または粉末状としたろう材あるいはｉまたはＡ１
合金からなる芯材にこのろうを被覆した合わせ材（プレ
ージングシート）として用いられる。The A1 alloy used in the heat exchanger may be any material with a melting point higher than that of the brazing filler metal, including tubes, plates,
It is processed into a fin shape and used. The brazing material is Al-3
i-based, AJ-Zn-based alloys are used, and the shape is plate, linear, or powdered brazing filler metal or i or A1
It is used as a plating sheet, which is a core material made of an alloy coated with this wax.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
実施例１
第１図に示すように、３００３合金（Ａｌ−０，１％Ｃ
ｕ−１，２％Ｍｎ合金）を芯材とし、その片側に４３４
３合金（ＡＪ−７，５％Ｓｉ合金）を１０％クラッドし
た厚さ １．６１のＢＡｌＩＰＣを外面が４３４３合金
となるように電縫し、その一端に１−４％Ｚｎ−１％Ｍ
ｇ合金からなるコネクター（４）を溶接により取り付け
てヘッダーパイプ（１）を形成し、このヘッダーパイプ
（＋＋にＤ９７合金（Ａｌ−０，５％Ｃｕ合金）製の肉
厚０．４ｍｍの押出チューブ（２）を取付け、該チュー
ブ（２）間に３００３合金を芯材とし、その両面に４３
４３合金を１０％ずつクラッドした厚さ０．１６＋ｎｍ
のＢ＾１２ＰＣからなるコルゲートフィン（３）を配置
する。このようにしてヘッダーパイプ（１）に厚さ１．
ｔｉｍｍの３００３合金からなるキャップ（５）を取
付け、パラレルフロータイブ熱交換器とし、これを治具
で固定した。Example 1 As shown in Fig. 1, 3003 alloy (Al-0.1%C
U-1,2%Mn alloy) is used as the core material, and 434 is used as the core material on one side.
3 alloy (AJ-7, 5% Si alloy) with a thickness of 1.61 is electrically sewn so that the outer surface is 4343 alloy, and 1-4% Zn-1% M is attached to one end.
A connector (4) made of g alloy is attached by welding to form a header pipe (1), and an extruded tube with a wall thickness of 0.4 mm made of D97 alloy (Al-0.5% Cu alloy) is attached to this header pipe (++). (2) is installed, 3003 alloy is used as the core material between the tubes (2), and 43
Thickness 0.16+nm with 10% cladding of 43 alloy
A corrugated fin (3) consisting of B^12 PCs is placed. In this way, the header pipe (1) has a thickness of 1.
A cap (5) made of Timm 3003 alloy was attached to form a parallel flow type heat exchanger, and this was fixed with a jig.
この組立物を有機溶剤で脱脂してステンレス製のトレー
上に載置した。そして第１表に示したフラックス蒸気を
分圧１〜３ｔｌ（１ｍｍＩ１ｇ含み、酸素分圧５ ｍｍ
Ｈｇ、水蒸気分圧１０ｍｍＨｇである窒素ガス雰囲気で
、６１０℃に保持された電気炉内にこのトレーを挿入し
、上記組立物を６１０℃で５分間加熱してろう付けを実
施した。This assembly was degreased with an organic solvent and placed on a stainless steel tray. Then, the flux vapor shown in Table 1 was heated to a partial pressure of 1 to 3 tl (1 mm I, containing 1 g, and an oxygen partial pressure of 5 mm).
The tray was inserted into an electric furnace maintained at 610° C. in a nitrogen gas atmosphere with a partial pressure of Hg and water vapor of 10 mmHg, and the above assembly was heated at 610° C. for 5 minutes to perform brazing.
上配ろう付は後の熱交換器を炉外へ取り出して表面のフ
ラックス付着量の測定を行い、またろう付は状況を調べ
てこれらの結果を第１表に示した。その後常法によりク
ロメート処理、親水処理を行いこれらの付着性をクロメ
ート性、親水性として第１表に併記した。また表面処理
後の熱交換器の耐食性を評価するために、ＩｔｓＺ２３
７＋に基づく塩水噴霧試験を１００時間行い、試験後の
熱交換器表面の腐食による白粉の発生状況を観察した。For top brazing, the heat exchanger was taken out of the furnace and the amount of flux deposited on the surface was measured, and the brazing conditions were investigated and the results are shown in Table 1. Thereafter, chromate treatment and hydrophilic treatment were carried out using conventional methods, and the adhesion properties of these treatments are also listed in Table 1 as chromate property and hydrophilic property. In addition, in order to evaluate the corrosion resistance of the heat exchanger after surface treatment, ItsZ23
A salt water spray test based on 7+ was conducted for 100 hours, and the generation of white powder due to corrosion on the surface of the heat exchanger after the test was observed.
その結果を第１表に併記した。The results are also listed in Table 1.
比較例１
比較のためろう付は後のフラックス付着量を変えたパラ
レルフロータイブ熱交換器を製造し、その特性調査を実
施例と同様に行い、その結果を第１表に示した。即ち上
記第１図に示す熱交換器のろう付は雰囲気のフラックス
蒸気分圧をさらに大きく変えることにより、ろう付は後
のフラックス付着量を変化させた。Comparative Example 1 For comparison, a parallel flow type heat exchanger was manufactured in which the amount of flux applied after brazing was changed, and its characteristics were investigated in the same manner as in the example, and the results are shown in Table 1. That is, the brazing of the heat exchanger shown in FIG. 1 further changed the partial pressure of flux vapor in the atmosphere, thereby changing the subsequent amount of flux deposited.
その後の工程は上記実施例と同様に行い、かつこのろう
付けされた熱交換器について上記と同様な評価試験を行
ってそれらの結果について第１表に示した。The subsequent steps were carried out in the same manner as in the above examples, and the brazed heat exchanger was subjected to the same evaluation tests as above, and the results are shown in Table 1.
従来例１
比較のためパラレルフロータイブ熱交換器の組立物を従
来法でろう付けしたものについて、その特性を調査した
。即ち第１図に示す組立物を有機溶剤により脱脂したの
ち１０％濃度のＫＡｌＦ４懸濁液を塗布し、２００℃で
１０分間の乾燥を行った。その後酸素分圧５ ｍｍＨｇ
、水蒸気分圧１０ｎｍＨｇである窒素ガス雰囲気で置換
され、６１０℃に保持された電気炉内にこの組立物を挿
入して６１０℃で５分間加熱してろう付けを行った。Conventional Example 1 For comparison, the characteristics of a parallel flow type heat exchanger assembly brazed using a conventional method were investigated. That is, after the assembly shown in FIG. 1 was degreased with an organic solvent, a 10% KAlF4 suspension was applied and dried at 200° C. for 10 minutes. Then oxygen partial pressure 5 mmHg
This assembly was inserted into an electric furnace maintained at 610° C. and replaced with a nitrogen gas atmosphere having a water vapor partial pressure of 10 nmHg, and brazed by heating at 610° C. for 5 minutes.
その後の工程は上記実施例と同様に行い、かつこのろう
付けされた熱交換器について上記と同様な評価試験を行
ってそれらの結果について第１表に示した。The subsequent steps were carried out in the same manner as in the above examples, and the brazed heat exchanger was subjected to the same evaluation tests as above, and the results are shown in Table 1.
第１表より明らかなように本発明によるろう付は後の熱
交換器表面のフラックス付着量は少な（、ろう付状況も
優れていた。さらにクロメート性、親水処理性も良好で
１００時間の塩水噴霧試験でも腐食による白粉は生じて
いない。As is clear from Table 1, after brazing according to the present invention, the amount of flux deposited on the surface of the heat exchanger was small (and the brazing condition was also excellent. Furthermore, the chromate property and hydrophilic treatment properties were also good, and it was No white powder due to corrosion was produced in the spray test.
これに対し比較例ではフラックス付着量が少なすぎる場
合健全なろう付けを行うことができず、一方フラックス
付着量が多すぎる場合は、ろう付は性は良好であったが
、ろう付は後の表面処理性が劣化しており、塩水噴霧試
験では腐食による白粉が部分的に発生していた。従来法
によるコンデンサーは、表面のフラックス付着量が多く
、外観上好ましくない。またろう付状況は良好であった
が、ろう付は後のクロメート処理および親水処理皮膜は
不均一であり、塩水噴霧試験では著しく腐食して白粉が
発生した。On the other hand, in the comparative example, if the amount of flux attached was too small, sound brazing could not be performed, while if the amount of flux attached was too large, the brazing properties were good, but the The surface treatment properties were deteriorated, and white powder due to corrosion was partially generated in the salt spray test. Capacitors manufactured by conventional methods have a large amount of flux deposited on the surface, which is unfavorable in terms of appearance. Although the brazing condition was good, the chromate treatment and hydrophilic treatment film after brazing was uneven, and in the salt spray test, there was significant corrosion and white powder was generated.
このように本発明によれば、良好なろう付けが得られる
ばかりか、フラックスの付着量が少なく、クロメート性
、親水処理性等の表面処理性が良好となり、耐食性が向
上する等工業上顕著な効果を奏するものである。As described above, according to the present invention, not only good brazing can be obtained, but also the amount of flux attached is small, surface treatment properties such as chromate properties and hydrophilic properties are improved, and corrosion resistance is improved. It is effective.
第１図はエアコン室内機用Ａ１合金製熱交換器の一例を
示す説明図である。
１・・・ヘッダープレート
２・・・チューブ
３・・・コルゲートフィン
４・・・コネクター
５・・・キャップ
第１
３
らFIG. 1 is an explanatory diagram showing an example of an A1 alloy heat exchanger for an indoor unit of an air conditioner. 1... Header plate 2... Tube 3... Corrugated fin 4... Connector 5... Cap No. 1 3 etc.
Claims (1)
ろう付けする気相ろう付けによりろう付けされたエアコ
ン室内機用Ａｌ合金製交換器において、表面の非腐食性
フラックスの付着量を０．００５〜０．６ｇ／ｍ＾２と
したことを特徴とする表面処理性に優れたエアコン室内
機用Ａｌ合金製熱交換器。In an Al alloy exchanger for an air conditioner indoor unit that is brazed by vapor phase brazing in a non-oxidizing atmosphere where non-corrosive flux vapor is present, the amount of non-corrosive flux deposited on the surface is 0.005. An Al alloy heat exchanger for an indoor unit of an air conditioner with excellent surface treatment properties, characterized by a heat exchanger of ~0.6 g/m^2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26470189A JPH03138081A (en) | 1989-10-11 | 1989-10-11 | Heat exchanger made of al alloy for equipment in air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26470189A JPH03138081A (en) | 1989-10-11 | 1989-10-11 | Heat exchanger made of al alloy for equipment in air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03138081A true JPH03138081A (en) | 1991-06-12 |
Family
ID=17406984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26470189A Pending JPH03138081A (en) | 1989-10-11 | 1989-10-11 | Heat exchanger made of al alloy for equipment in air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03138081A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001074530A1 (en) * | 2000-03-30 | 2001-10-11 | Solvay Fluor Und Derivate Gmbh | Novel use for complex fluorides |
-
1989
- 1989-10-11 JP JP26470189A patent/JPH03138081A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001074530A1 (en) * | 2000-03-30 | 2001-10-11 | Solvay Fluor Und Derivate Gmbh | Novel use for complex fluorides |
| JP2003529452A (en) * | 2000-03-30 | 2003-10-07 | ゾルファイ フルーオル ウント デリヴァーテ ゲゼルシャフト ミット ベシュレンクテル ハフツング | New uses of complex fluorides |
| US6880746B2 (en) | 2000-03-30 | 2005-04-19 | Solvay Fluor Und Derivate Gmbh | Fluorostannate-containing brazing or soldering fluxes and use thereof in brazing or soldering aluminum or aluminum alloys |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4645119A (en) | Method of brazing an aluminum heat exchanger | |
| JP4577634B2 (en) | Aluminum alloy extruded tube with brazing filler metal for heat exchanger | |
| JPH0422666B2 (en) | ||
| JPH0232072B2 (en) | ||
| US4444353A (en) | Brazing filler metal composition and process | |
| JPH03138081A (en) | Heat exchanger made of al alloy for equipment in air conditioner | |
| JPH0468073B2 (en) | ||
| US4379121A (en) | Brazing filler metal composition and process | |
| JPH0569631B2 (en) | ||
| JPS6018294A (en) | Aluminum-brazed joint | |
| JPS58171580A (en) | Method for preventing corrosion of heat exchanger made of aluminum | |
| JPH03114663A (en) | Heat exchanger made of al alloy | |
| JPH02284766A (en) | Vapor phase soldering method of al or al alloy | |
| JP2644324B2 (en) | Gas phase brazing of Al or Al alloy | |
| JPH0399795A (en) | Flux for vapor phase brazing of aluminum or aluminum alloy | |
| JPH0230792B2 (en) | ||
| JPH0335896A (en) | Composition for brazing aluminum or aluminum alloy | |
| JPH07164137A (en) | Brazing method | |
| JPH03114666A (en) | Vapor brazing method for al or al alloy | |
| JPH04258397A (en) | Brazing filler metal for low temperature brazing for aluminum member | |
| JPH01166900A (en) | Flux for brazing aluminum member | |
| JPS6037293A (en) | Brazing method of aluminum and alloy thereof | |
| JPS62110866A (en) | Heat exchanger manufacturing method | |
| JPH0390274A (en) | Vapor brazing method for al or al alloy | |
| JPH03230888A (en) | How to braze aluminum materials |