JP3407175B2 - How to expand a tube with inner fins - Google Patents
How to expand a tube with inner finsInfo
- Publication number
- JP3407175B2 JP3407175B2 JP06255796A JP6255796A JP3407175B2 JP 3407175 B2 JP3407175 B2 JP 3407175B2 JP 06255796 A JP06255796 A JP 06255796A JP 6255796 A JP6255796 A JP 6255796A JP 3407175 B2 JP3407175 B2 JP 3407175B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tube
- fins
- peripheral surface
- fin
- 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.)
- Expired - Fee Related
Links
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
- F28F1/24—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 and extending transversely
- F28F1/32—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 and extending transversely the means having portions engaging further tubular elements
-
- 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
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、たとえば自動車
の油圧式パワーステアリング装置や、同じく自動変速装
置等に用いられるオイルクーラを製造するさいに、イン
ナーフィン付き管を拡管する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for expanding a pipe with an inner fin when manufacturing an oil cooler used in, for example, a hydraulic power steering device for automobiles, an automatic transmission, or the like.
【０００２】なお、以下の説明において、「アルミニウ
ム」という語には、純アルミニウムの他にアルミニウム
合金を含むものとする。In the following description, the term "aluminum" includes aluminum alloy in addition to pure aluminum.
【０００３】[0003]
【従来の技術と発明が解決しようとする課題】上述した
オイルクーラとして、互いに平行に伸びた２つの直管部
を有する横断面円形のアルミニウム押出形材製Ｕ字状ア
ルミニウム管と、アルミニウム管の両直管部にまたがっ
て渡し止められた多数の並列状アルミニウム製プレート
フィンとを備えており、アルミニウム管の内周面に、そ
の長さ方向に伸びるとともに管内周面からの突出高さが
等しい複数のインナーフィンが、円周方向に間隔をおい
て一体に形成されているものが知られている。2. Description of the Related Art As the oil cooler described above, a U-shaped aluminum pipe made of an aluminum extruded profile having a circular cross section and having two straight pipe portions extending in parallel to each other, and an aluminum pipe. Equipped with a large number of parallel plate fins made of aluminum that are bridged over both straight pipe parts, and extend in the length direction on the inner peripheral surface of the aluminum pipe, and the projection height from the inner peripheral surface of the pipe is equal. It is known that a plurality of inner fins are integrally formed at intervals in the circumferential direction.
【０００４】このようなオイルクーラは次のようにして
製造されていた。すなわち、Ｕ字状インナーフィン付き
アルミニウム管と、２つの円形貫通孔を有するプレート
フィンとを用意し、まずアルミニウム管の直管部をプレ
ートフィンの貫通孔に通す。ついで、アルミニウム管の
直管部を拡管することによって、アルミニウム管の直管
部の外周面をプレートフィンにおける貫通孔の周縁に密
着させる。その後、アルミニウム管とプレートフィンを
ろう付する。こうして、オイルクーラが製造されてい
た。上記方法におけるアルミニウム管の拡管は、インナ
ーフィンの先端部が位置する仮想円の直径よりも若干大
きな最大外径を有する拡管部材を使用し、拡管部材を管
内に通すことにより、拡管部材の外周面でインナーフィ
ンの先端を径方向外方に押してアルミニウム管を拡管す
ることにより行われていた。Such an oil cooler was manufactured as follows. That is, an aluminum tube with a U-shaped inner fin and a plate fin having two circular through holes are prepared, and first, the straight tube portion of the aluminum tube is passed through the through hole of the plate fin. Then, by to tube expansion straight pipe portion of the aluminum tube, brought into close contact with the outer peripheral surface of the straight pipe portion of the A aluminum tube to the periphery of the through hole in the plate fins. Then, the aluminum tube and the plate fin are brazed. Thus, the oil cooler was manufactured. The pipe expansion of the aluminum pipe in the above method uses a pipe expansion member having a maximum outer diameter slightly larger than the diameter of the virtual circle where the tip of the inner fin is located, and the pipe expansion member is passed through the pipe to form an outer peripheral surface of the pipe expansion member. Then, the tip of the inner fin is pushed outward in the radial direction to expand the aluminum tube.
【０００５】ところで、最近では、オイルクーラの冷却
効率を一層向上させるために、アルミニウム管の内周面
に、長さ方向に伸びかつ突出高さの異なる複数のインナ
ーフィンが円周方向に間隔をおいて設けられているもの
が提案されている（特開平６−３３１２９４号公報参
照）。By the way, recently, in order to further improve the cooling efficiency of the oil cooler, a plurality of inner fins extending in the length direction and having different projecting heights are circumferentially arranged on the inner peripheral surface of the aluminum pipe. It has been proposed that the device be provided in advance (see Japanese Patent Laid-Open No. 6-331294).
【０００６】ところで、このようなオイルクーラを製造
するさいのアルミニウム管の拡管は、従来の拡管方法を
応用すれば、突出高さの高いインナーフィンの先端部が
位置する仮想円の直径よりも大きな最大外径を有する拡
管部材を使用し、拡管部材を管内に通すことにより、拡
管部材の外周面で突出高さの高いインナーフィンの先端
を径方向外方に押してアルミニウム管を拡管することに
より行われることになる。By the way, when the conventional pipe expanding method is applied, the pipe expanding of the aluminum pipe for manufacturing such an oil cooler is larger than the diameter of the virtual circle in which the tips of the inner fins having a high protruding height are located. By using a pipe expanding member with the maximum outer diameter and passing the pipe expanding member inside the pipe, the tip of the inner fin with a high protruding height is pushed radially outward by the outer peripheral surface of the pipe expanding member to expand the aluminum pipe. Will be seen.
【０００７】しかしながら、この場合、突出高さの高い
インナーフィン間のピッチはかなり大きくなるので、拡
管後のアルミニウム管の外形がいびつなものになり、そ
の結果アルミニウム管の外周面とプレートフィンの貫通
孔の周縁との間に隙間が生じ、アルミニウム管とフィン
との間の伝熱効率が悪くなるという問題がある。また、
突出高さの高いインナーフィンがの先端が潰れるおそれ
がある。However, in this case, since the pitch between the inner fins having a high protruding height becomes considerably large, the outer shape of the aluminum tube after expansion becomes distorted, and as a result, the outer peripheral surface of the aluminum tube and the plate fin penetrate. There is a problem that a gap is formed between the holes and the peripheral edge of the holes, and the heat transfer efficiency between the aluminum tube and the fins deteriorates. Also,
The tip of the inner fin having a high protruding height may be crushed.
【０００８】この発明の目的は、上記問題を解決したイ
ンナーフィン付き管の拡管方法を提供することにある。An object of the present invention is to provide a method for expanding a tube with an inner fin that solves the above problems.
【０００９】[0009]
【課題を解決するための手段】請求項１の発明によるイ
ンナーフィン付き管の拡管方法は、内周面に、その長さ
方向に伸びかつ突出高さの異なるインナーフィンが円周
方向に間隔をおいて交互に設けられているインナーフィ
ン付き管を拡管する方法であって、管の内径よりも大き
な最大外径を有するとともに、外周面にその軸線方向に
伸びかつ管のインナーフィンが緩く嵌まる複数の凹溝が
円周方向に間隔をおいて形成され、しかも凹溝の幅およ
び深さがインナーフィンの幅および高さよりも大きくな
っている拡管部材を使用し、インナーフィンを凹溝に嵌
めた状態で拡管部材を管内に通すことにより、拡管部材
外周面における隣接する凹溝間の部分で管内面のインナ
ーフィンの存在しない部分を押圧して拡管することを特
徴とするものである。Means for Solving the Problems] tube expansion method with inner fin tube according to the invention of claim 1, the inner peripheral surface, different Louis N'nafin spacing in the circumferential direction of elongation and projection height in the longitudinal direction This is a method of expanding pipes with inner fins that are alternately provided with a pipe having a maximum outer diameter larger than the inner diameter of the pipe and extending in the axial direction on the outer peripheral surface and the inner fins of the pipe are loosely fitted. Use a pipe expanding member in which multiple concave grooves are formed at intervals in the circumferential direction, and the width and depth of the concave grooves are larger than the width and height of the inner fins. The pipe expanding member is passed through the inside of the pipe in a fitted state, so that the portion of the outer peripheral surface of the pipe expanding member between the adjacent concave grooves presses the portion of the inner surface of the pipe where the inner fin does not exist to expand the pipe. .
【００１０】この発明の拡管方法によれば、拡管部材外
周面における隣接する凹溝間の部分で管内面のインナー
フィンの存在しない部分を押圧して拡管するのであるか
ら、拡管された管の外形がいびつになることはない。ま
た、インナーフィンを拡管部材の外周面に形成され、か
つその幅および深さがインナーフィンの幅および高さよ
りも大きくなっている凹溝に嵌めた状態で拡管部材を管
内に通すのであるから、拡管時にインナーフィンが潰れ
るのが防止される。According to the pipe expanding method of the present invention, since the portion of the outer peripheral surface of the pipe expanding member between the adjacent concave grooves presses the portion of the inner surface of the pipe where the inner fin does not exist to expand the pipe, the outer shape of the expanded pipe. There is no need to worry. Further, since the inner fin is formed on the outer peripheral surface of the pipe expanding member, and the width and depth of the inner fin are fitted into the concave grooves which are larger than the width and height of the inner fin, the pipe expanding member is passed through the pipe. The inner fins are prevented from being crushed when the pipe is expanded.
【００１１】請求項２の発明によるオイルクーラの製造
方法は、互いに平行に伸びた２つの直管部を有する横断
面円形のＵ字状管と、管の両直管部にまたがって渡し止
められた多数の並列状プレートフィンとを備えており、
管の内周面に、その長さ方向に伸びかつ突出高さの異な
るインナーフィンが円周方向に間隔をおいて交互に設け
られているオイルクーラを製造する方法であって、Ｕ字
状インナーフィン付き管と、２つの円形貫通孔を有する
プレートフィンとを用意し、管の直管部をプレートフィ
ンの貫通孔に通した後、管の直管部を請求項１記載の方
法により拡管することによって、管の直管部の外周面を
プレートフィンにおける貫通孔の周縁に密着させること
を含むものである。 Manufacture of an oil cooler according to the invention of claim 2
Method comprises a transverse section having two straight pipe sections extending parallel to each other.
A U-shaped pipe with a circular surface and a crossing stop that straddles both straight pipe parts of the pipe
Equipped with a large number of parallel plate fins
On the inner peripheral surface of the pipe, it extends in the length direction and has a different protruding height.
Inner fins are alternately arranged at intervals in the circumferential direction
U-shaped method for producing a conventional oil cooler
With inner fins and two circular through holes
Prepare plate fins and attach the straight pipe part of the pipe to the plate
The method according to claim 1, wherein the straight pipe portion of the pipe is passed through the through hole of the pipe.
By expanding the pipe by the method, the outer peripheral surface of the straight pipe part of the pipe
Adhere to the periphery of the through hole in the plate fin.
Is included .
【００１２】請求項３の発明によるオイルクーラは、請
求項２記載の方法により製造されたものである。The oil cooler according to the invention of claim 3 is a contractor.
It is produced by the method described in claim 2 .
【００１３】請求項４の発明による油圧式パワーステア
リング装置は、請求項３記載のオイルクーラを備えたも
のである。 A hydraulic power steering system according to a fourth aspect of the present invention.
The ring device includes the oil cooler according to claim 3.
Of .
【００１４】請求項５の発明による自動変速装置は、請
求項３記載のオイルクーラを備えたものである。The automatic transmission according to the invention of claim 5 is a contractor.
The oil cooler according to claim 3 is provided .
【００１５】[0015]
【発明の実施の形態】以下、この発明の実施の形態を、
図面を参照して説明する。この実施形態は、この発明の
方法を、オイルクーラの製造のさいのアルミニウム管の
拡管に適用したものである。なお、以下の説明におい
て、図２の右側を前、これと反対側を後というものとす
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
A description will be given with reference to the drawings. In this embodiment, the method of the present invention is applied to the expansion of an aluminum pipe in the production of an oil cooler. In the following description, the right side of FIG. 2 is referred to as the front and the opposite side is referred to as the rear.
【００１６】拡管すべきインナーフィン付きアルミニウ
ム管(1)の内周面には、その長さ方向に伸びかつ突出高
さの異なる２種類のインナーフィン(2)(3)が円周方向に
間隔をおいて交互に設けられている。拡管部材(4)は、
その外径が前端から後方に向かって徐々に大きくなると
ともに、最大外径が拡管すべき管(1)の内径よりも若干
大きく、外周面にその軸線方向に伸びかつ拡管すべき管
(1)のインナーフィン(2)(3)が緩く嵌まる複数の凹溝(5)
(6)が円周方向に間隔をおいて交互に形成されている。
凹溝(5)(6)の幅および深さはインナーフィン(2)(3)の幅
および高さよりも若干大きくなっている。Two kinds of inner fins (2) and (3) extending in the length direction and having different projecting heights are circumferentially spaced on the inner peripheral surface of the aluminum pipe (1) with inner fins to be expanded. Are alternately provided. The expansion member (4)
The outer diameter gradually increases from the front end toward the rear, and the maximum outer diameter is slightly larger than the inner diameter of the pipe (1) to be expanded, and the pipe to be expanded and expanded in the axial direction on the outer peripheral surface.
Multiple recessed grooves (5) into which the inner fins (2) and (3) of (1) fit loosely
(6) are formed alternately at intervals in the circumferential direction.
The width and depth of the concave grooves (5) and (6) are slightly larger than the width and height of the inner fins (2) and (3).
【００１７】そして、まず拡管すべきインナーフィン付
きアルミニウム管(1)を、多数の並列状アルミニウム製
プレートフィン(7)に形成された円形貫通孔(8)に通す。
プレートフィン(7)の貫通孔(8)の直径は拡管すべきアル
ミニウム管(1)の外径よりも若干大きく、その周囲には
隣接するプレートフィン(7)間の間隔を保つための筒状
部(9)が一体に形成されている。筒状部(9)の先端には外
向きフランジ(10)が一体に形成されている。First, the aluminum tube (1) with an inner fin to be expanded is passed through a circular through hole (8) formed in a number of parallel plate fins (7) made of aluminum.
The diameter of the through hole (8) of the plate fin (7) is slightly larger than the outer diameter of the aluminum pipe (1) to be expanded, and a cylindrical shape around the plate fin (7) for maintaining a space between the adjacent plate fins (7). The part (9) is integrally formed. An outward flange (10) is integrally formed at the tip of the tubular portion (9).
【００１８】ついで、拡管部材(4)を押込み部材(11)の
先端に着脱自在に取付け、インナーフィン(2)(3)を凹溝
(5)(6)に嵌めるように、その前端からアルミニウム管
(1)内に挿入して前進させる。すると、拡管部材(4)の外
周面における隣接する凹溝(5)(6)間の部分で管(1)内面
のインナーフィン(2)(3)の存在しない部分が径方向外方
に押圧され、その結果アルミニウム管(1)が拡管され
る。そして、アルミニウム管(1)の外周面がプレートフ
ィン(7)の貫通孔(8)の周縁および筒状部(9)の内周面に
密着させられる。なお、その後アルミニウム管(1)とプ
レートフィン(7)とはろう付される。Then, the tube expanding member (4) is detachably attached to the tip of the pushing member (11), and the inner fins (2) and (3) are recessed.
(5) Fit the aluminum tube from its front end so that it fits into (6).
(1) Insert inside and move forward. Then, a portion of the outer peripheral surface of the pipe expanding member (4) between the adjacent concave grooves (5) and (6) is pressed radially outward by a portion of the inner surface of the pipe (1) where the inner fins (2) and (3) are not present. As a result, the aluminum tube (1) is expanded. Then, the outer peripheral surface of the aluminum tube (1) is brought into close contact with the peripheral edge of the through hole (8) of the plate fin (7) and the inner peripheral surface of the tubular portion (9). After that, the aluminum tube (1) and the plate fin (7) are brazed.
【００１９】上記においては、この発明の拡管方法をオ
イルクーラの製造のさいのアルミニウム管の拡管に適用
した場合について説明したが、この発明の拡管方法は、
このようなアルミニウム管の拡管以外にも適用可能であ
る。また、アルミニウム以外の材料からなる管の拡管に
適用することができることは当然である。In the above description, the case of applying the pipe expanding method of the present invention to the pipe expanding of an aluminum pipe in the production of an oil cooler has been described.
The present invention can be applied to other than expansion of such an aluminum tube. Further, it goes without saying that it can be applied to the expansion of a tube made of a material other than aluminum.
【００２０】[0020]
【発明の効果】この発明の拡管方法によれば、上述のよ
うに、拡管された管の外形がいびつになることはないの
で、たとえば熱交換管とフィンとの固着のための拡管に
適用した場合には、熱交換管とフィンとの間の伝熱効率
が優れたものになる。しかも、インナーフィンの潰れが
防止される。As described above, according to the pipe expanding method of the present invention, the outer shape of the expanded pipe is not distorted, so that the present invention is applied to the pipe expanding for fixing the heat exchange pipe and the fin. In this case, the heat transfer efficiency between the heat exchange tube and the fin becomes excellent. Moreover, the inner fins are prevented from being crushed.
【図１】この発明の拡管方法に用いられる拡管部材の最
大外径部分の横断面図である。FIG. 1 is a transverse cross-sectional view of a maximum outer diameter portion of a pipe expanding member used in a pipe expanding method of the present invention.
【図２】この発明の拡管方法を示す縦断面図である。FIG. 2 is a vertical sectional view showing a tube expanding method of the present invention.
【図３】図２のIII −III 線拡大断面図である。FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG.
【図４】図２のIV−IV線拡大断面図である。FIG. 4 is an enlarged sectional view taken along line IV-IV of FIG.
(1) インナーフィン付きアルミニウム管 (2)(3) インナーフィン (4) 拡管部材 (5)(6) 凹溝 (1) Aluminum tube with inner fin (2) (3) Inner fin (4) Tube expansion member (5) (6) Groove
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B21D 53/08 B21D 39/20 F28F 1/32 F28F 1/40 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. 7 , DB name) B21D 53/08 B21D 39/20 F28F 1/32 F28F 1/40
Claims (5)
高さの異なるインナーフィンが円周方向に間隔をおいて
交互に設けられているインナーフィン付き管を拡管する
方法であって、管の内径よりも大きな最大外径を有する
とともに、外周面にその軸線方向に伸びかつ管のインナ
ーフィンが緩く嵌まる複数の凹溝が円周方向に間隔をお
いて形成され、しかも凹溝の幅および深さがインナーフ
ィンの幅および高さよりも大きくなっている拡管部材を
使用し、インナーフィンを凹溝に嵌めた状態で拡管部材
を管内に通すことにより、拡管部材外周面における隣接
する凹溝間の部分で管内面のインナーフィンの存在しな
い部分を押圧して拡管することを特徴とするインナーフ
ィン付き管の拡管方法。To 1. A inner peripheral surface, different Louis N'nafin elongation and projection height in the longitudinal direction at intervals in the circumferential direction
A method of expanding tubes provided with inner fins that are alternately provided, having a maximum outer diameter larger than the inner diameter of the tube, and extending in the axial direction on the outer peripheral surface, and the inner fins of the tube being loosely fitted. A state in which the inner fins are fitted in the recessed grooves using a pipe expanding member in which the recessed grooves are formed at intervals in the circumferential direction, and the width and depth of the recessed grooves are larger than the width and height of the inner fins. A method for expanding a tube with an inner fin, wherein the tube is expanded by passing the tube expanding member into the tube by pressing a portion of the outer peripheral surface of the tube expanding member where adjacent inner grooves do not have inner fins. .
る横断面円形のＵ字状管と、管の両直管部にまたがって
渡し止められた多数の並列状プレートフィンとを備えて
おり、管の内周面に、その長さ方向に伸びかつ突出高さ
の異なるインナーフィンが円周方向に間隔をおいて交互
に設けられているオイルクーラを製造する方法であっ
て、Ｕ字状インナーフィン付き管と、２つの円形貫通孔
を有するプレートフィンとを用意し、管の直管部をプレ
ートフィンの貫通孔に通した後、管の直管部を請求項１
記載の方法により拡管することによって、管の直管部の
外周面をプレートフィンにおける貫通孔の周縁に密着さ
せることを含むオイルクーラの製造方法。 2. Having two straight pipe portions extending parallel to each other
U-shaped pipe with a circular cross section and straddling both straight pipe parts of the pipe
With a number of parallel plate fins
Cage, on the inner peripheral surface of the pipe, extending in the lengthwise direction and protruding height
Inner fins of different shapes are alternately arranged at intervals in the circumferential direction
Is a method of manufacturing an oil cooler installed in
Tube with U-shaped inner fin and two circular through holes
Prepare plate fins with
The straight pipe part of the pipe after passing through the through hole of the auto fin is provided.
By expanding the pipe by the method described,
Attach the outer peripheral surface to the peripheral edge of the through hole in the plate fin.
A method for manufacturing an oil cooler, which includes:
イルクーラ。 3. An oval manufactured by the method according to claim 2.
Irkula.
圧式パワーステアリング装置。 4. An oil equipped with the oil cooler according to claim 3.
Pressure type power steering device.
動変速装置。 5. A vehicle equipped with the oil cooler according to claim 3.
Dynamic transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06255796A JP3407175B2 (en) | 1996-03-19 | 1996-03-19 | How to expand a tube with inner fins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06255796A JP3407175B2 (en) | 1996-03-19 | 1996-03-19 | How to expand a tube with inner fins |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09253775A JPH09253775A (en) | 1997-09-30 |
| JP3407175B2 true JP3407175B2 (en) | 2003-05-19 |
Family
ID=13203702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06255796A Expired - Fee Related JP3407175B2 (en) | 1996-03-19 | 1996-03-19 | How to expand a tube with inner fins |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3407175B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846638A (en) * | 2012-11-30 | 2014-06-11 | Lg电子株式会社 | Heat exchanger and method of manufacturing the same |
| US9566672B2 (en) | 2012-12-10 | 2017-02-14 | Lg Electronics Inc. | Method of manufacturing a heat exchanger |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001289585A (en) * | 2000-04-05 | 2001-10-19 | Mitsubishi Alum Co Ltd | Inner grooved aluminum tube and heat exchanger comprising the same |
| WO2003036213A1 (en) * | 2001-10-22 | 2003-05-01 | Showa Denko K.K. | Finned tube for heat exchangers, heat exchanger, process for producing heat exchanger finned tube, and process for fabricating heat exchanger |
| CN100340835C (en) * | 2001-12-17 | 2007-10-03 | 昭和电工株式会社 | Heat exchanger and process for fabricating same |
| KR20050085449A (en) * | 2002-12-10 | 2005-08-29 | 쇼와 덴코 가부시키가이샤 | Finned tube for heat exchangers, heat exchanger, apparatus for fabricating heat exchanger finned tube and process for fabricating heat exchanger finned tube |
| US7181929B2 (en) | 2002-12-10 | 2007-02-27 | Showa Denko K.K. | Finned tube for heat exchangers, heat exchanger, apparatus for fabricating heat exchanger finned tube and process for fabricating heat exchanger finned tube |
| ES2427863T3 (en) * | 2008-04-24 | 2013-11-04 | Mitsubishi Electric Corporation | Heat exchanger and air conditioning that uses the same |
-
1996
- 1996-03-19 JP JP06255796A patent/JP3407175B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846638A (en) * | 2012-11-30 | 2014-06-11 | Lg电子株式会社 | Heat exchanger and method of manufacturing the same |
| US9566672B2 (en) | 2012-12-10 | 2017-02-14 | Lg Electronics Inc. | Method of manufacturing a heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09253775A (en) | 1997-09-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20030121 |
|
| LAPS | Cancellation because of no payment of annual fees |