JP2576742Y2 - Flat perforated tube made of extruded material for heat exchanger with inner fin - Google Patents

Flat perforated tube made of extruded material for heat exchanger with inner fin

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Publication number
JP2576742Y2
JP2576742Y2 JP1990112595U JP11259590U JP2576742Y2 JP 2576742 Y2 JP2576742 Y2 JP 2576742Y2 JP 1990112595 U JP1990112595 U JP 1990112595U JP 11259590 U JP11259590 U JP 11259590U JP 2576742 Y2 JP2576742 Y2 JP 2576742Y2
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JP
Japan
Prior art keywords
inner fin
heat exchanger
width direction
tube
peripheral wall
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 - Lifetime
Application number
JP1990112595U
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Japanese (ja)
Other versions
JPH0473763U (en
Inventor
茂 葛生
Original Assignee
昭和アルミニウム株式会社
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Priority to JP1990112595U priority Critical patent/JP2576742Y2/en
Publication of JPH0473763U publication Critical patent/JPH0473763U/ja
Application granted granted Critical
Publication of JP2576742Y2 publication Critical patent/JP2576742Y2/en
Anticipated expiration legal-status Critical
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Description

【考案の詳細な説明】 産業上の利用分野 この考案は、カークーラー用凝縮器等の熱交換器に用
いられるアルミニウム等の金属による、インナーフィン
付きの押出型材製偏平多孔チューブ材に関する。
DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION This invention relates to a flat perforated tube made of extruded material with inner fins and made of metal such as aluminum used for heat exchangers such as condensers for car coolers.

従来の技術 最近の熱交換器にはコンパクト化、軽量化が要求さ
れ、これを実現する一手段として、熱交換器に使用され
る偏平多孔チューブを、第6図に示されるように、内部
の各孔部(55)の内面全体に、伝熱面積を広くするため
の長さ方向に連続するインナーフィン(51)が一体に成
形されたものにすることが行われている。
2. Description of the Related Art Recent heat exchangers are required to be compact and lightweight, and as one means for achieving this, a flat perforated tube used in a heat exchanger is internally provided as shown in FIG. An inner fin (51) that is continuous in the length direction to increase the heat transfer area is integrally formed on the entire inner surface of each hole (55).

このようなインナーフィン(51)付きの偏平多孔チュ
ーブ材(50)の製造は、一般に、組合わせダイスを用い
て行われている。
The production of such a flat porous tube material (50) with inner fins (51) is generally performed using a combination die.

このダイスは、雌型と雄型とからなるもので、雌型は
チューブの外周形状を定める長円状の成形用開口を有し
ている。また、雄型には、第7図に示されるように、チ
ューブ(50)の内部形状を定める、所定間隔おきに横一
列に配置された成形用単位凸部(52)を前端部に有する
成形凸部(53)がブリッジ(14)に支持されたかたちで
具備されている。そして、各成形用単位凸部(52)はそ
の全周がインナーフィン(51)形成のため横断面ジクザ
ク状に形成されたものとなされている。
This die is composed of a female die and a male die, and the female die has an oblong forming opening for defining the outer peripheral shape of the tube. In addition, as shown in FIG. 7, the male mold has a molding unit convex portion (52) which is arranged in a horizontal line at predetermined intervals and which is provided at the front end thereof, which defines the internal shape of the tube (50). The projection (53) is provided in a form supported by the bridge (14). Each molding unit convex portion (52) is formed in a zigzag cross section in order to form the inner fin (51).

上記両型を組み合わせたダイスを用い、これに金属材
料を通すことにより、第6図に示されるような、内周面
及び仕切り壁の両面の全てにインナーフィン(51)が設
けられた偏平多孔チューブ材(50)が製造される。
By using a die combining the above two types and passing a metal material through the die, a flat porous plate having inner fins (51) provided on both the inner peripheral surface and both surfaces of the partition wall as shown in FIG. A tube material (50) is manufactured.

考案が解決しようとする課題 しかしながら、上記のようにして製造されたチューブ
材(50)には、その幅方向の両端部の周壁(54)(54)
にムシレ等、材料欠陥が発生することがあり、これを熱
交換器に使用した場合に、漏れ、接合不良などの種々の
弊害が惹起されることがあった。
However, the tube material (50) manufactured as described above has peripheral walls (54) (54) at both ends in the width direction.
In some cases, material defects such as wrinkles may occur, and when this is used for a heat exchanger, various adverse effects such as leakage and poor bonding may be caused.

この考案は、かかる欠点を解決し、幅方向の両端部の
周壁における材料欠陥の発生を確実に防止しうるインナ
ーフィン付きの熱交換器用押出型材製偏平多孔チューブ
材を提供することを目的とする。
It is an object of the present invention to provide a flat porous tube made of an extruded material for a heat exchanger with an inner fin that can solve such a drawback and reliably prevent the occurrence of material defects in the peripheral walls at both ends in the width direction. .

課題を解決するための手段 本考案者は、上記のような材料欠陥の発生原因を解明
すべく、種々研究を重ねた結果、次のような事実をつき
とめた。
Means for Solving the Problems The present inventors have conducted various studies in order to elucidate the causes of the above-described material defects, and as a result, have found the following facts.

即ち、チューブ材(50)の幅方向の両端部周壁(54)
(54)には、成形凸部(53)を支持するブリッジ(14)
によって分断された金属が該ブリッジ通過後に合流接着
して形成された、いわゆる圧着部(56)が存在するが、
従来、この圧着部(56)形成部位にもインナーフィン
(51)を存在させる設計仕様をとっていたことが、両端
部周壁の材料欠陥を生じさせていた。
That is, both end peripheral walls (54) in the width direction of the tube material (50)
(54) Bridge (14) supporting the convex part (53)
There is a so-called crimped portion (56) formed by joining and bonding the metals separated by the bridge after passing through the bridge.
Conventionally, the design specification in which the inner fin (51) is also present at the portion where the crimping portion (56) is formed has caused material defects at the peripheral walls at both ends.

その理由は、次のように考えられる。即ち、圧着部
(56)形成位置は、実際上該両端部周壁(54)(54)の
高さ方向に微妙に変化し、該圧着部(56)がインナーフ
ィン(51)の山部に生じたり、谷部に生じたりしてしま
う。そのため、圧着部(56)が山部に形成されている場
合には、圧着部の圧着面積が大きいが、谷部に形成され
ると圧着部の圧着面積が小さくなってしまう。そして、
押出によるという性質上、ダイスの中心軸線から径方向
外方に離れるに従ってそこを流れる押出材料には不純物
が多く含まれるようになる。そのため、圧着部(56)が
インナーフィン(51)の谷部に生じると、圧着面積の減
少と不純物の介入とが相俟って圧着性能が非常に悪いも
のとなってしまう。
The reason is considered as follows. In other words, the position where the crimping portion (56) is formed actually changes slightly in the height direction of the peripheral walls (54) and (54) of the both ends, and the crimping portion (56) is formed at the peak of the inner fin (51). Or occur in valleys. Therefore, when the crimping portion (56) is formed at the peak, the crimping area of the crimping portion is large, but when it is formed at the valley, the crimping area of the crimping portion is reduced. And
Due to the nature of extrusion, the extruded material flowing radially outward from the center axis of the die contains more impurities. Therefore, when the crimping portion (56) is formed at the valley of the inner fin (51), the reduction in the crimping area and the intervention of the impurities are combined, and the crimping performance becomes extremely poor.

この考案は、上記のような知見に基づいてなされたも
ので、幅方向の両端部周壁に押出成形材料の合流接着に
よる圧着部を有し、内部が仕切り壁によって幅方向に複
数個の孔部に区画されると共に、該孔部の内面に長さ方
向に連続するインナーフィンが一体に押出成形されたイ
ンナーフィン付きの熱交換器用押出型材製偏平多孔チュ
ーブ材において、 幅方向両端部の円弧状周壁部分の内面が、インナーフ
ィンを有しない円弧状面に形成されると共に、同幅方向
両端の周壁の壁厚さが、インナーフィンを有する他の部
分の周壁の壁厚より、インナーフィンの山の高さと略同
じ高さ分だけ厚肉に形成されていることを特徴とするイ
ンナーフィン付きの熱交換器用押出型材製偏平多孔チュ
ーブ材を要旨とする。
This invention has been made based on the above-mentioned knowledge, and has a pressure-bonded portion formed by joining and joining extruded materials on the peripheral walls at both ends in the width direction, and has a plurality of holes formed in the width direction by a partition wall. In a flat porous tube made of an extruded material for a heat exchanger with an inner fin, the inner fin of which is extruded integrally with an inner fin that is continuous in the length direction on the inner surface of the hole, arc-shaped at both ends in the width direction The inner surface of the peripheral wall portion is formed in an arc-shaped surface having no inner fin, and the wall thickness of the peripheral wall at both ends in the same width direction is larger than the wall thickness of the peripheral wall of the other portion having the inner fin. The present invention provides a flat porous tube made of an extruded die material for a heat exchanger and having an inner fin, which is formed so as to have a thickness substantially equal to the height of the tube.

作用 上記チューブ材では、幅方向両端部の円弧状周壁部分
の内面が、インナーフィンを有しない円弧状面に形成さ
れると共に、当該両端周壁の壁厚さが、他の周壁部分の
壁厚よりインナーフィンの山高さと略同じ高さ分だけ厚
肉に形成された設計仕様であることにより、圧着部の形
成位置が端部周壁の高さ方向において変化したとしても
圧着面積が小さくなったりせず、そのため、圧着不良が
起きず、材料欠陥の発生が防止される。
In the above-mentioned tube material, the inner surfaces of the arc-shaped peripheral wall portions at both ends in the width direction are formed as arc-shaped surfaces having no inner fin, and the wall thickness of the peripheral wall portions at both ends is larger than the wall thickness of the other peripheral wall portions. Due to the design specifications that are formed to be as thick as the height of the inner fin, the crimping area does not decrease even if the crimping part formation position changes in the height direction of the end peripheral wall. Therefore, poor pressure bonding does not occur, and the occurrence of material defects is prevented.

実施例 次に、この考案のチューブ材の実施例を説明する。Example Next, an example of the tube material of the present invention will be described.

本考案のチューブ材は、第4図及び第5図に示される
ようないわゆるマルチフロータイプの熱交換器に適用さ
れる。この熱交換器は、カークーラー用凝縮器などとし
て用いられるもので、左右一対の中空筒状のアルミニウ
ム製ヘッダー(1)(1)間に多数本の同アルミニウム
製チューブ(2)が渡され、該チューブ(2)間にコル
ゲートフィン(3)が配置され、全体がろう付けにより
接合一体化されたものとなされている。なお、(4)は
冷媒入口管、(5)は同出口管、(6)はヘッダー
(1)内を上下の室に仕切る仕切部材である。
The tube material of the present invention is applied to a so-called multi-flow type heat exchanger as shown in FIGS. This heat exchanger is used as a condenser for a car cooler or the like, and a number of aluminum tubes (2) are passed between a pair of left and right hollow cylindrical aluminum headers (1) (1). A corrugated fin (3) is arranged between the tubes (2), and the whole is joined and integrated by brazing. In addition, (4) is a refrigerant inlet pipe, (5) is the same outlet pipe, and (6) is a partition member which partitions the inside of the header (1) into upper and lower chambers.

なお、いうまでもないが、本考案のチューブ材の適用
される熱交換器はかかるマルチフロータイプの熱交換器
のチューブ(2)に限定されるものではない。
Needless to say, the heat exchanger to which the tube material of the present invention is applied is not limited to the tube (2) of the multi-flow type heat exchanger.

上記熱交換器におけるチューブ(2)を構成するチュ
ーブ材の横断面形状を第1図に示す。同図のように、こ
のチューブ材(7)は、断面長円状に偏平化された形状
を有すると共に、内部が仕切り壁(8)によって幅方向
に合計4個の孔部(9)に区画されたものとなされてい
る。そして、このチューブ材(7)の幅方向両端部の円
弧状の周壁部分(18)(18)の内面がインナーフィンを
有しない円弧状面(24)に形成されると共に、仕切り壁
(8)の両側面、及び各孔部(9)の上下の壁面に、長
さ方向に連続する多数本のインナーフィン(19)が設け
られたものとなされている。
FIG. 1 shows a cross-sectional shape of a tube material constituting the tube (2) in the heat exchanger. As shown in the figure, this tube material (7) has a shape that is flattened into an elliptical cross section, and its interior is partitioned into a total of four holes (9) in the width direction by a partition wall (8). It has been made. The inner surfaces of the arc-shaped peripheral wall portions (18) (18) at both ends in the width direction of the tube material (7) are formed as arc-shaped surfaces (24) having no inner fin, and the partition wall (8). A large number of inner fins (19) which are continuous in the length direction are provided on both side surfaces of the fin and the upper and lower wall surfaces of each hole (9).

また、チューブ材(7)の両端周壁(18)(18)の壁
厚(t1)は、インナーフィン(19)を有する他の部分の
周壁の壁厚(t2)よりも、インナーフィン(19)の山の
高さ(h)と略同じ高さ分だけ、厚肉に形成されたもの
となされている。即ち、(t1)≒(t2)+(h)に形成
されている。
The wall thickness (t 1 ) of the peripheral walls (18, 18) at both ends of the tube material (7) is larger than the wall thickness (t 2 ) of the peripheral wall of the other portion having the inner fin (19). The thickness is formed to be as thick as the height (h) of the peak of (19). That is, (t 1 ) ≒ (t 2 ) + (h).

そして、このチューブ材(7)は、その横断面形状に
対応する形状の成形隙間をもつ、雄型と雌型との組み合
わせによる組合わせダイス(10)を用いて製造される。
And this tube material (7) is manufactured using the combination die (10) by the combination of a male type and a female type which has a forming gap of the shape corresponding to the cross-sectional shape.

このダイス(10)は、第3図に示されるように、雌型
(11)と雄型(12)とからなるもので、雌型(11)は、
チューブ材(7)の外周形状を定める長円状の成形用開
口(13)を有している。また、雄型(12)には、同図及
び第2図に示されるように、チューブ材(7)の内部形
状を定める、所定間隔おきに横一列に配置された成形用
単位凸部(21)を前端部に有する成形凸部(20)がブリ
ッジ(14)に支持されたかたちで具備されている。そし
て、第2図に詳細に示されるように、両サイドの成形用
単位凸部(21)の外側弧状面を除いたかたちで各成形用
単位凸部(21)面が横断面ジクザク状に形成されてい
る。
As shown in FIG. 3, the dice (10) is composed of a female die (11) and a male die (12).
An oval molding opening (13) for defining the outer peripheral shape of the tube material (7) is provided. Also, as shown in FIGS. 2 and 3, the male mold (12) has molding unit convex portions (21) arranged in a horizontal line at predetermined intervals to determine the internal shape of the tube material (7). ) At the front end thereof are provided in a form supported by the bridge (14). Then, as shown in detail in FIG. 2, each molding unit convex portion (21) surface is formed in a zigzag cross-sectional shape excluding the outer arc-shaped surfaces of the molding unit convex portions (21) on both sides. Have been.

この組合わせダイス(10)に押出材料を通して押出成
形を行えば、圧着部(22)の形成位置が端部周壁(18)
(18)の高さ方向において変化したとしても圧着面積が
小さくなるということがなく、そのため、圧着不良が起
きることがなく、材料欠陥の発生が防止される。
If extrusion molding is performed by passing the extruded material through the combination die (10), the crimping portion (22) is formed at the end peripheral wall (18).
Even if it changes in the height direction of (18), the pressure bonding area does not become small, so that no pressure bonding failure occurs and the occurrence of material defects is prevented.

この組合わせダイス(10)に押出材料を通して押出成
形を行えば、ブリッジ(14)によって分断された押出材
料が最側部の成形用単位凸部(21)の外側面を通過する
過程で、両押出材料の流れが良好に圧着方向に向き、押
出材料同士の圧着性能が良好なものとなること等の理由
により、得られたチューブ材(7)の両端周壁(18)
(18)の圧着部(22)(22)に起因する材料欠陥の発生
が防止される。
If the extruded material is extruded through the combination die (10), the extruded material cut by the bridge (14) passes through the outer surface of the outermost molding unit convex portion (21). Because the flow of the extruded material is favorably oriented in the crimping direction and the crimping performance of the extruded materials is good, the peripheral walls (18) of both ends of the obtained tube (7) are obtained.
The generation of material defects caused by the crimping portions (22) and (22) of (18) is prevented.

なお、チューブ材(7)の仕切り壁(8)の高さ方向
中央部にも圧着部を生じるが、この部分に圧着不良を生
じるようなことがあったとしも、チューブ材(7)内部
のことであり、障害が惹起することはない。むしろ、こ
の場合には、伝熱面積の向上を図る意味において、積極
的にインナーフィン(19)を設けるようにする方が実際
的である。
The crimping portion is also formed at the center in the height direction of the partition wall (8) of the tube material (7). Even if a crimping failure may occur at this portion, the inside of the tube material (7) may be crimped. That is, there is no obstacle. Rather, in this case, it is practical to actively provide the inner fins (19) in order to improve the heat transfer area.

また、チューブ材(7)の両端部の周壁(18)(18)
内面にインナーフィン(19)を設けないことによる伝熱
面積の減少分は、全体的に見ればわずかであり、実際
上、そこにインナーフィン(19)を設けたものと比較し
全く遜色のない伝熱性能が発揮される。
In addition, peripheral walls (18) (18) at both ends of the tube material (7)
The reduction of the heat transfer area due to the absence of the inner fin (19) on the inner surface is small as a whole, and is practically comparable to that with the inner fin (19) provided. Heat transfer performance is exhibited.

また、本考案のチューブ材(7)がこのように材料欠
陥のない品質的に優れたものであることにより、特に、
上記のような、ヘッダー(1)とチューブ(2)との接
合部の多いマルチフロー熱交換器に本考案のチューブ材
を用いた場合に、チューブ(2)とヘッダー(1)との
各接合部の接合性能、上記の熱交換器でいえばろう付け
性能を全ての部分にわたって良好なものとすることがで
き、漏れ、ろう付け不良等の障害が起こる危険性を大幅
に少なくしうる。
In addition, since the tube material (7) of the present invention is excellent in quality without any material defects,
When the tube material of the present invention is used for the multi-flow heat exchanger having many joints between the header (1) and the tube (2) as described above, each joint between the tube (2) and the header (1) is used. The joining performance of the parts, and the brazing performance in the case of the above-mentioned heat exchanger, can be improved over all parts, and the risk of failures such as leakage and poor brazing can be greatly reduced.

考案の効果 上述の次第で、この考案のインナーフィン付きの熱交
換器用押出型材製偏平多孔チューブ材は、幅方向両端部
の円弧状周壁部分の内面が、インナーフィンを有しない
円弧状面に形成されると共に、同幅方向両端の周壁の壁
厚さが、インナーフィンを有する他の部分の周壁の壁厚
より、インナーフィンの山の高さと略同じ高さ分だけ厚
肉に形成されているから、チューブ材の幅方向両端部で
の押出成形材料の圧着部の圧着面積を大きく確保でき、
押出成形時に圧着部の形成位置が端部周壁の高さ方向に
おいて変化しても、圧着不良が起きず、幅方向両端部の
周壁の材料欠陥の発生がなく、ひいては漏れや、他の部
材との接合不良を起こすなどの種々の弊害の発生を防止
することができる。また、上記両端周壁の壁厚さは、上
記のように他の部分の周壁よりインナーフィンの高さと
略同じ高さ分だけ厚肉のものとなされているから、上記
効果を確保しながら、チューブ材の幅方向両端部の、熱
交換媒体が流通される孔部の通路断面積が周壁面積の厚
肉化のために極端に狭小化されるという弊害の発生を回
避し、良好な熱交換性能の維持を可能とする。
Effect of the Invention As described above, according to the invention, the flat porous tube material made of the extruded die material for the heat exchanger with the inner fins has the inner surface of the arc-shaped peripheral wall portion at both ends in the width direction formed into an arc-shaped surface having no inner fin. At the same time, the wall thickness of the peripheral wall at both ends in the same width direction is formed to be thicker than the wall thickness of the peripheral wall of the other portion having the inner fin by the height substantially equal to the height of the ridge of the inner fin. From this, it is possible to secure a large crimping area of the crimping part of the extruded material at both ends in the width direction of the tube material
Even if the forming position of the crimping part changes in the height direction of the end peripheral wall at the time of extrusion molding, poor crimping does not occur, there is no occurrence of material defects on the peripheral wall at both ends in the width direction, and thus leakage and other members and Various adverse effects such as the occurrence of poor bonding can be prevented. In addition, since the wall thickness of the peripheral walls at both ends is made as thick as the height of the inner fin from the peripheral walls of the other portions as described above, the tube is secured while securing the above effects. Good heat exchange performance, avoiding the adverse effect that the passage cross-sectional area of the hole through which the heat exchange medium flows at both ends in the width direction of the material is extremely narrowed due to the increase in the peripheral wall area. It is possible to maintain

【図面の簡単な説明】[Brief description of the drawings]

第1図ないし第5図は本考案の実施例を示すもので、第
1図はチューブ材の横断面図、第2図は該チューブ材の
製造に使用される組合わせダイスの雄型成形凸部を示す
斜視図、第3図は組合わせダイスを雄型と雌型との分離
して示す斜視図、第4図は熱交換器の全体正面図、第5
図は同平面図である。 第6図は従来のチューブ材の横断面図、第7図は該チュ
ーブ材の製造に使用される組合わせダイスの雄型成形凸
部を示す斜視図である。 (7)…チューブ材、(8)…仕切り壁、(9)…孔
部、(18)…端部周壁、(19)…インナーフィン、(2
4)…円弧状面。
1 to 5 show an embodiment of the present invention. FIG. 1 is a cross-sectional view of a tube material, and FIG. 2 is a male mold convex of a combination die used for manufacturing the tube material. FIG. 3 is a perspective view showing a combined die separated into a male die and a female die, FIG. 4 is an overall front view of the heat exchanger, and FIG.
The figure is the same plan view. FIG. 6 is a cross-sectional view of a conventional tube material, and FIG. 7 is a perspective view showing a male molding convex portion of a combination die used for manufacturing the tube material. (7) Tube material, (8) Partition wall, (9) Hole, (18) End peripheral wall, (19) Inner fin, (2
4) Arc-shaped surface.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】幅方向の両端部周壁に押出型材料の合流接
着による圧着部を有し、内部が仕切り壁によって幅方向
に複数個の孔部に区画されると共に、該孔部の内面に長
さ方向に連続するインナーフィンが一体に押出成形され
たインナーフィン付きの熱交換器用押出型材製偏平多孔
チューブ材において、 幅方向両端部の円弧状周壁部分の内面が、インナーフィ
ンを有しない円弧状面に形成されると共に、同幅方向両
端の周壁の壁厚さが、インナーフィンを有する他の部分
の周壁の壁厚より、インナーフィンの山の高さと略同じ
高さ分だけ厚肉に形成されていることを特徴とするイン
ナーフィン付きの熱交換器用押出型材製偏平多孔チュー
ブ材。
1. A pressure bonding portion formed by joining and joining extruded materials on both peripheral walls at both ends in the width direction, the inside of which is divided into a plurality of holes in the width direction by a partition wall, and an inner surface of the holes is formed. In a flat porous tube made of an extruded die material for a heat exchanger with inner fins formed by integrally extruding inner fins continuous in a length direction, an inner surface of an arc-shaped peripheral wall portion at both ends in a width direction has no inner fin. The wall thickness of the peripheral wall at both ends in the same width direction is thicker than the wall thickness of the peripheral wall of the other portion having the inner fin by the height substantially equal to the height of the inner fin. A flat porous tube made of an extruded material for a heat exchanger having an inner fin, wherein the tube is formed.
JP1990112595U 1990-10-26 1990-10-26 Flat perforated tube made of extruded material for heat exchanger with inner fin Expired - Lifetime JP2576742Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990112595U JP2576742Y2 (en) 1990-10-26 1990-10-26 Flat perforated tube made of extruded material for heat exchanger with inner fin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990112595U JP2576742Y2 (en) 1990-10-26 1990-10-26 Flat perforated tube made of extruded material for heat exchanger with inner fin

Publications (2)

Publication Number Publication Date
JPH0473763U JPH0473763U (en) 1992-06-29
JP2576742Y2 true JP2576742Y2 (en) 1998-07-16

Family

ID=31860105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990112595U Expired - Lifetime JP2576742Y2 (en) 1990-10-26 1990-10-26 Flat perforated tube made of extruded material for heat exchanger with inner fin

Country Status (1)

Country Link
JP (1) JP2576742Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5664272B2 (en) * 2011-01-21 2015-02-04 ダイキン工業株式会社 Heat exchanger and air conditioner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6391492A (en) * 1986-10-03 1988-04-22 Nippon Denso Co Ltd Heat exchanger

Also Published As

Publication number Publication date
JPH0473763U (en) 1992-06-29

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