JPH11221639A - Tube for heat exchanger and its production - Google Patents

Tube for heat exchanger and its production

Info

Publication number
JPH11221639A
JPH11221639A JP3800698A JP3800698A JPH11221639A JP H11221639 A JPH11221639 A JP H11221639A JP 3800698 A JP3800698 A JP 3800698A JP 3800698 A JP3800698 A JP 3800698A JP H11221639 A JPH11221639 A JP H11221639A
Authority
JP
Japan
Prior art keywords
tube
heat exchanger
tubular member
aluminum alloy
manufacturing
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
Application number
JP3800698A
Other languages
Japanese (ja)
Inventor
Hiroki Konya
弘機 紺谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MA Aluminum Corp
Original Assignee
Mitsubishi Aluminum Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Aluminum Co Ltd filed Critical Mitsubishi Aluminum Co Ltd
Priority to JP3800698A priority Critical patent/JPH11221639A/en
Publication of JPH11221639A publication Critical patent/JPH11221639A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To obtain a tube for a heat exchanger with which a fluid peeling effect at the wall surface of the tube of a heat medium flowing therein is made obtainable by microruggedness and heat transfer efficiency is excellent as the flow of the heat medium is made turbulent by forming the ruggedness on the inside surface of the tube by ironing of its outside diameter. SOLUTION: A tubular member 10 of the diameter larger than the outside diameter of a product is produced by extrusion forming of an aluminum alloy. The member is successively introduced to a die 11. At this time, the aluminum alloy is preferably completely recrystallized by previously subjecting the alloy to an O material treatment. The tubular member 10 is drawn by inserting the member into a die 11 without interposing a plug therein. The outside diameter of the tubular member 10 is then reduced by the drawing and the thickness corresponding to its reduction component is pushed toward the inside surface. The pushed thickness components interfere with each other within the reduced area and the inside surface is roughened, by which the microruggedness 12 is formed toward a longitudinal direction.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、各種の熱交換器等
に用いられる熱交換器用チューブおよびその製造方法に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger tube used for various heat exchangers and the like, and a method for producing the same.

【0002】[0002]

【従来の技術】一般に、エアコンディショナー、冷凍
機、床暖房等の各種の熱交換器には、熱媒体の流路にな
るとともに、外気等との間に伝熱による熱交換を行なわ
せるための交換器用チューブが組込まれている。そし
て、これら熱交換器用チューブとしては、通常、銅製や
アルミニウム製あるいはその合金製の引抜き管、押出管
または電縫管が用いられている。図4は、従来のこの種
の熱交換器用チューブの製造方法の一例を模式的に表し
たもので、この製造方法は、先ず銅やアルミニウムある
いはその合金の引抜加工や押出加工によって製品外径寸
法よりも大径の管材1を製造し、次いでこの管材1の内
面にプラグ2を介装した状態で、ダイス3によって引抜
き加工を行なうことにより、内外周面が平坦な所望の寸
法形状の熱交換器用チューブ4に成形するものである。
このようにして製造された熱交換器用チューブ4は、図
5に示すように、外周に伝熱面積を増加させるためのフ
ィン5が一体的に接合されて、上述した各種の熱交換器
に組込まれる。
2. Description of the Related Art In general, various heat exchangers such as an air conditioner, a refrigerator and a floor heater serve as a flow path of a heat medium and exchange heat with external air by heat transfer. An exchange tube is incorporated. As the tubes for these heat exchangers, usually, drawn tubes, extruded tubes or ERW tubes made of copper, aluminum, or alloys thereof are used. FIG. 4 schematically shows an example of a conventional method of manufacturing this type of heat exchanger tube. This manufacturing method is based on a method in which copper or aluminum or an alloy thereof is first drawn or extruded to obtain an outer diameter of a product. A pipe 1 having a larger diameter than that of the pipe 1 is manufactured, and then a plug 3 is inserted on the inner surface of the tube 1 and the die 3 is subjected to a drawing process. It is formed into a dexterous tube 4.
As shown in FIG. 5, the heat exchanger tube 4 manufactured in this manner has a fin 5 for increasing a heat transfer area integrally joined to the outer periphery thereof, and is incorporated in the above-described various heat exchangers. It is.

【0003】[0003]

【発明が解決しようとする課題】ところで、上記従来の
熱交換器用チューブの製造方法にあっては、図5に示す
ように、得られた熱交換器用チューブ4の内面が平坦で
あるために、内部を流れる熱媒体が層流になり、この結
果熱交換器用チューブ4の壁面への伝熱効率が低いとい
う問題点があった。このため、当該熱交換器用チューブ
4における伝熱効率を向上させるべく、例えばプラグ2
の外周に螺旋状の突部を形成し、管材1の引抜きと同期
させて当該プラグ2を回転させることにより、上記熱交
換器用チューブの内面に螺旋状の凹凸を刻設する製造方
法も知られている。
In the above-mentioned conventional method for manufacturing a heat exchanger tube, as shown in FIG. 5, since the inner surface of the obtained heat exchanger tube 4 is flat, The heat medium flowing inside becomes laminar, and as a result, there is a problem that the heat transfer efficiency to the wall surface of the heat exchanger tube 4 is low. Therefore, in order to improve the heat transfer efficiency in the heat exchanger tube 4, for example, the plug 2
A manufacturing method is also known in which a spiral projection is formed on the outer periphery of the heat exchanger tube, and the plug 2 is rotated in synchronization with the extraction of the tube material 1 to thereby form spiral irregularities on the inner surface of the heat exchanger tube. ing.

【0004】しかしながら、このような熱交換器用チュ
ーブの製造方法においては、プラグ2の外周面の加工を
要するために、上記プラグ2が高価になるとともに、こ
のプラグ2を回転させるための駆動装置が必要となり、
よって装置全体およびその制御が複雑化するという問題
点があった。しかも、図6に示すような、内部が一体に
形成された隔壁6によって複数の孔部7に分割されてカ
ーエヤコン用エバポレータやコンデンサー等に使用され
ている偏平多穴チューブ8に対しては、一般的に幅寸法
が15〜130mmであって、かつ厚さ寸法が2〜5m
mであり、よって各々の上記孔部7が微細孔で当該孔部
7にプラグ2を介装することが不可能であるために、こ
のような偏平多穴チューブ8には適用することができな
い。
However, in such a method of manufacturing a tube for a heat exchanger, since the outer peripheral surface of the plug 2 is required, the plug 2 is expensive, and a driving device for rotating the plug 2 is required. Required
Therefore, there has been a problem that the entire apparatus and its control are complicated. Moreover, as shown in FIG. 6, a flat multi-hole tube 8 which is divided into a plurality of holes 7 by a partition wall 6 integrally formed and used for a car air conditioner evaporator, a condenser or the like is generally used. The width is 15 to 130 mm and the thickness is 2 to 5 m
m, so that each of the holes 7 is a fine hole and it is impossible to interpose the plug 2 in the hole 7 and thus cannot be applied to such a flat multi-hole tube 8. .

【0005】本発明は、上記従来の熱交換器用チューブ
の製造方法が有する課題を有効に解決すべくなされたも
ので、引抜き管、押出管または電縫管によって製造され
た管状部材から内周面に凹凸が形成された熱交換器用チ
ューブを容易に製造することができる熱交換器用チュー
ブの製造方法および当該製造方法によって製造された伝
熱効率の向上した熱交換器用チューブを提供することを
目的とするものである。
The present invention has been made to effectively solve the problems of the above-mentioned conventional method for manufacturing a tube for a heat exchanger, and has an inner peripheral surface formed from a tubular member manufactured by a drawn tube, an extruded tube, or an electric resistance welded tube. It is an object of the present invention to provide a method of manufacturing a heat exchanger tube that can easily manufacture a heat exchanger tube having irregularities formed thereon, and a heat exchanger tube with improved heat transfer efficiency manufactured by the manufacturing method. Things.

【0006】[0006]

【課題を解決するための手段】請求項1に記載の本発明
に係る熱交換器用チューブは、チューブ内面に、外径の
しごき加工によって形成された凹凸が形成されているこ
とを特徴とするものである。ここで、請求項2に記載の
発明は、上記チューブがアルミニウムまたはアルミニウ
ム合金からなることを特徴とするものであり、さらに請
求項3に記載の発明は、請求項1または2に記載のチュ
ーブは、内部が一体に形成された隔壁によって複数の孔
部に分割された偏平多穴チューブであることを特徴とす
るものである。
According to a first aspect of the present invention, there is provided a heat exchanger tube according to the present invention, wherein an inner surface of the tube is provided with irregularities formed by ironing an outer diameter. It is. Here, the invention according to claim 2 is characterized in that the tube is made of aluminum or an aluminum alloy, and the invention according to claim 3 is a tube according to claim 1 or 2. , Characterized in that it is a flat multi-hole tube divided into a plurality of holes by a partition wall formed integrally.

【0007】次いで、請求項4に記載の本発明に係る熱
交換器用チューブの製造方法は、金属材料によって製品
外径よりも大径の管状部材を製造し、次いでこの管状部
材を内部にプラグを介在させずに引抜加工して、外径の
みをしごき加工することにより、内面に凹凸を形成する
ことを特徴とするものである。また、請求項5に記載の
発明は、請求項4に記載の発明において、金属材料がア
ルミニウムまたはアルミニウム合金であり、かつ上記引
抜加工を行なう前に、O材処理することを特徴とするも
のであり、請求項6に記載の発明は、アルミニウムまた
はアルミニウム合金の押出加工によって上記管状部材を
製造し、押出された上記管状部材を連続的に上記引抜加
工することを特徴とするものである。さらに、請求項7
に記載の発明は、請求項4ないし6のいずれかに記載の
管状部材が、押出加工された偏平多穴チューブであるこ
とを特徴とするものである。
Next, according to a fourth aspect of the present invention, there is provided a method for manufacturing a tube for a heat exchanger, wherein a tubular member having a diameter larger than an outer diameter of a product is manufactured from a metal material, and a plug is inserted into the tubular member. It is characterized in that irregularities are formed on the inner surface by drawing out without intervening and ironing only the outer diameter. According to a fifth aspect of the present invention, in the fourth aspect, the metal material is aluminum or an aluminum alloy, and the material is treated with an O material before the drawing is performed. The invention according to claim 6 is characterized in that the tubular member is manufactured by extruding aluminum or an aluminum alloy, and the extruded tubular member is continuously subjected to the drawing process. Further, claim 7
The invention described in (1) is characterized in that the tubular member according to any one of claims 4 to 6 is an extruded flat multi-hole tube.

【0008】請求項1〜3のいずれかに記載の熱交換器
用チューブおよび請求項4〜7のいずれかに記載の当該
熱交換器用チューブの製造方法によれば、予め製品外径
よりも大径に形成された管状部材を、内部にプラグを介
在させずに引抜加工することにより、当該引抜加工によ
る外径の縮径分の肉厚が、管状部材の内面に向かって押
込まれ、縮小された面積内で互いに干渉する。これによ
り、上記内面が荒れて長手方向に向けて微小な凹凸が形
成された熱交換器用チューブが得られる。この結果、上
記内面に形成された微小凹凸によって、内部を流れる熱
媒体のチューブ壁面における流体剥離効果が得られ、当
該熱媒体の流れが乱流になるために、優れた伝熱効率を
得ることが可能になる。したがって、上記熱交換器用チ
ューブの製造方法によれば、このような伝熱効率に優れ
た熱交換器用チューブを、容易に製造することができ
る。
According to the method for manufacturing a tube for a heat exchanger according to any one of claims 1 to 3 and the method for manufacturing a tube for a heat exchanger according to any one of claims 4 to 7, the diameter is larger than the outer diameter of the product in advance. By drawing out the tubular member formed in the above, without interposing a plug inside, the thickness of the outer diameter reduced by the drawing is pushed toward the inner surface of the tubular member and reduced. Interfere with each other within the area. Thereby, the heat exchanger tube in which the inner surface is roughened and minute irregularities are formed in the longitudinal direction is obtained. As a result, due to the minute irregularities formed on the inner surface, a fluid separation effect on the tube wall surface of the heat medium flowing inside is obtained, and the flow of the heat medium becomes turbulent, so that excellent heat transfer efficiency can be obtained. Will be possible. Therefore, according to the method for manufacturing a heat exchanger tube, it is possible to easily manufacture such a heat exchanger tube having excellent heat transfer efficiency.

【0009】ここで、伝熱効率を向上させるに充分な微
小凹凸を形成するためには、肉厚が0.5〜1.5mm
の範囲である場合において、外径D’の管状部材を引抜
加工して外径Dの熱交換器用チューブとする際に、その
縮径率(D’−D)/D’を80%〜95%の範囲に設
定することが好ましい。また、本発明は、銅やアルミニ
ウムもしくはそれらの合金等からなる各種の金属製熱交
換器用チューブに適用可能であるが、特に請求項2、5
または6に記載の発明のように、アルミニウムまたはア
ルミニウム合金からなる熱交換器用チューブに適用した
場合に、上述した引抜加工時における内面凹凸化の効果
が顕著に得られることから、最も好適である。
Here, in order to form fine irregularities sufficient to improve the heat transfer efficiency, the thickness must be 0.5 to 1.5 mm.
When the tubular member having the outer diameter D ′ is drawn to form a heat exchanger tube having the outer diameter D, the diameter reduction ratio (D′−D) / D ′ is 80% to 95%. % Is preferably set. The present invention is applicable to various types of metal heat exchanger tubes made of copper, aluminum, or alloys thereof.
Also, when applied to a heat exchanger tube made of aluminum or an aluminum alloy as in the invention described in Item 6, it is most preferable because the above-described effect of making the inner surface uneven at the time of drawing is remarkably obtained.

【0010】特に、請求項5に記載の発明のように、引
抜加工を行なう前に、当該アルミニウムまたはアルミニ
ウム合金を、焼なましによって完全に再結晶化させる調
質であるO材処理を施しておけば、内面に凹凸を一層顕
著に形成することができて好適である。また、プラグを
存在させない上記引抜加工を行なう管状部材としては、
引抜管、押出管、電縫管等の各種加工方法によって成形
された管状部材が適用可能であるが、請求項6に記載の
発明のように、先ずアルミニウムまたはアルミニウム合
金の押出加工によって上記管状部材を製造し、これと連
続して押出された上記管状部材を引抜加工すれば、一の
連続した工程によって上記熱交換器用チューブを製造す
ることができる。
[0010] In particular, as described in the fifth aspect of the present invention, before the drawing, the aluminum or aluminum alloy is subjected to an O material treatment which is a temper for completely recrystallizing by annealing. It is preferable that unevenness can be formed more remarkably on the inner surface. Further, as a tubular member for performing the above-described drawing without a plug,
A tubular member formed by various processing methods, such as a drawn tube, an extruded tube, and an electric resistance welded tube, can be applied. However, as in the invention according to claim 6, the tubular member is formed by first extruding aluminum or an aluminum alloy. Is manufactured, and the tubular member extruded continuously therefrom is subjected to drawing processing, whereby the heat exchanger tube can be manufactured by one continuous process.

【0011】さらに、本発明は、請求項3または7に記
載の発明のように、内部が一体に形成された隔壁によっ
て複数の孔部に分割された偏平多穴チューブにも適用す
ることが可能である。この偏平多穴チューブに対して、
上述したプラグを介在させない引抜加工を行なうと、先
ず外周側がしごかれることにより、内周面に同様の微小
凹凸が形成される。そしてさらに、隔壁も板面方向に圧
縮されるために、その両側面に同様の微小凹凸が形成さ
れる。この結果、熱媒体の流路となる各孔部の4面に微
小の凹凸が形成されるため、本来の隔壁による伝熱効果
とあいまって、より一層優れた伝熱効率を有する熱交換
器用チューブになる。
Further, the present invention can be applied to a flat multi-hole tube divided into a plurality of holes by a partition having an integrally formed inside, as in the invention according to claim 3 or 7. It is. For this flat multi-hole tube,
When the above-described drawing without the interposition of the plug is performed, the same fine irregularities are formed on the inner peripheral surface by first squeezing the outer peripheral side. Further, since the partition walls are also compressed in the plate surface direction, similar minute unevenness is formed on both side surfaces thereof. As a result, fine irregularities are formed on the four surfaces of each hole serving as a flow path of the heat medium, and in combination with the heat transfer effect of the original partition walls, the heat exchanger tube having a much better heat transfer efficiency can be obtained. Become.

【0012】[0012]

【発明の実施の形態】図1および図2は、本発明に係る
熱交換器用チューブの製造方法を、アルミニウム合金製
の熱交換器用チューブを製造する場合に適用した一実施
形態を、各工程順に示すものである。この製造方法にお
いては、先ず図1に示すように、アルミニウム合金の押
出加工によって、製品外径よりも大径の管状部材10を
製造し、この押出された管状部材10を、当該押出装置
の下流側に配設されたダイス11に導いて行く。この際
に、予め上記アルミニウム合金にO材処理を施すことに
より、完全に再結晶化させておくことが望ましい。そし
て次に、図2に示すように、上記管状部材10をその内
部にプラグを介在させずにダイス11内に挿通させるこ
とにより引抜加工する。すると、この引抜加工によっ
て、管状部材10の外径が縮径され、そのリダクション
分の肉厚が内面に向かって押込まれる。この際に、外周
面よりも内周面のほうが面積が小さいために、押込まれ
た上記肉厚分は縮小された面積内で互いに干渉し、これ
により上記内面が荒れて長手方向に向けて微小な凹凸1
2が形成される。
1 and 2 show an embodiment in which a method for manufacturing a tube for a heat exchanger according to the present invention is applied to a case for manufacturing a tube for an aluminum alloy heat exchanger. It is shown. In this manufacturing method, first, as shown in FIG. 1, a tubular member 10 having a larger diameter than the product outer diameter is manufactured by extrusion of an aluminum alloy, and the extruded tubular member 10 is placed downstream of the extruder. It leads to the dice 11 arranged on the side. At this time, it is desirable that the aluminum alloy be completely recrystallized by previously performing an O material treatment. Next, as shown in FIG. 2, the tubular member 10 is inserted into a die 11 without a plug interposed therebetween, thereby performing a drawing process. Then, by the drawing process, the outer diameter of the tubular member 10 is reduced, and the thickness corresponding to the reduction is pushed toward the inner surface. At this time, since the area of the inner peripheral surface is smaller than that of the outer peripheral surface, the pushed-in thicknesses interfere with each other within the reduced area, whereby the inner surface is roughened and becomes minute in the longitudinal direction. Irregularities 1
2 are formed.

【0013】ここで、上記ダイス11としては、外径
D’の管状部材10の肉厚が0.5〜1.5mmの範囲
である場合において、これを引抜加工して外径Dの熱交
換器用チューブとする際に、その縮径率(D’−D)/
D’が80%〜95%の範囲になるようなものを選択す
る。以上の連続した工程によって、外径のみが製品外径
寸法にしごき加工されるとともに、内面に微小の凹凸1
2が形成された熱交換器用チューブ15が製造される。
このようにして、製造された熱交換器用チューブ15に
おいては、図3に示すように、内面に形成された微小凹
凸12によって、内部を流れる熱媒体のチューブ壁面に
おける流体剥離効果が得られ、この結果熱媒体の流れが
乱流になるために、優れた伝熱効率を得ることができ
る。
Here, when the thickness of the tubular member 10 having an outer diameter D 'is in the range of 0.5 to 1.5 mm, the die 11 is subjected to a drawing process to perform heat exchange of the outer diameter D. When making a dexterous tube, its diameter reduction ratio (D'-D) /
The one in which D 'is in the range of 80% to 95% is selected. By the above-described continuous process, only the outer diameter is ironed to the outer diameter of the product, and minute irregularities 1 are formed on the inner surface.
The tube 15 for a heat exchanger in which 2 was formed is manufactured.
In the heat exchanger tube 15 manufactured in this manner, as shown in FIG. 3, the minute irregularities 12 formed on the inner surface provide a fluid separation effect on the tube wall surface of the heat medium flowing inside. As a result, since the flow of the heat medium becomes turbulent, excellent heat transfer efficiency can be obtained.

【0014】したがって、上記熱交換器用チューブの製
造方法によれば、予め製品外径よりも大径に押出加工さ
れた管状部材10を、そのまま内部にプラグを介在させ
ずにダイス11によって引抜加工して、外周面のみをし
ごき加工することによって、内面に長手方向に向けて微
小な凹凸12が形成された熱交換器用チューブ15を製
造することができる。ここで、上述した引抜加工前に、
予めアルミニウム合金に、調質であるO材処理を施して
おけば、内面に凹凸を一層顕著に形成することができ
る。この結果、上記熱交換器用チューブの製造方法によ
れば、伝熱効率に優れた熱交換器用チューブ15を容易
に製造することができる。加えて、先ずアルミニウム合
金の押出加工によって管状部材10を製造し、これと連
続して押出された管状部材10をダイス11によって引
抜加工しているので、一の連続した工程によって上記熱
交換器用チューブ15を製造することができる。
Therefore, according to the method for manufacturing a tube for a heat exchanger, the tubular member 10 extruded in advance to a diameter larger than the outer diameter of the product is drawn by the die 11 without interposing a plug therein. Then, by ironing only the outer peripheral surface, it is possible to manufacture the heat exchanger tube 15 having the minute irregularities 12 formed on the inner surface in the longitudinal direction. Here, before the drawing process described above,
If the aluminum alloy is preliminarily subjected to a tempering O material treatment, the unevenness can be formed more conspicuously on the inner surface. As a result, according to the method for manufacturing a heat exchanger tube, the heat exchanger tube 15 having excellent heat transfer efficiency can be easily manufactured. In addition, since the tubular member 10 is first manufactured by extrusion of an aluminum alloy, and the tubular member 10 continuously extruded is drawn out by the die 11, the tube for the heat exchanger is formed by one continuous process. 15 can be manufactured.

【0015】なお、上記実施の形態においては、アルミ
ニウム合金の押出加工によって管状部材10を成形し、
これと連続してダイス11によってプラグを介在させな
い引抜加工を行なうことにより上記熱交換器用チューブ
15を製造する場合についてのみ説明したが、これに限
るものではなく、本発明は、銅等の他の金属からなる熱
交換器用チューブを製造する場合においても同様に適用
することができ、また管状部材10についても、引抜管
や電縫管等に対しても用いることが可能である。
In the above embodiment, the tubular member 10 is formed by extrusion of an aluminum alloy.
The description has been given only of the case where the tube 15 for the heat exchanger is manufactured by performing the drawing without the interposition of the plug by the die 11 successively, but the present invention is not limited to this case. The same can be applied to the case of manufacturing a heat exchanger tube made of metal, and the tubular member 10 can also be used for a drawn tube, an electric resistance welded tube, and the like.

【0016】また、本発明は、上記実施の形態に示した
管のみならず、マルチホロー管や異形管等にも適用する
ことができ、さらには図6に示したような、内部が一体
に形成された隔壁によって複数の孔部に分割された偏平
多穴チューブにも適用することができる。この偏平多穴
チューブに対して、上述したプラグを介在させない引抜
加工を行なった場合には、先ず外周側がしごかれること
により、内周面に同様の微小凹凸が形成され、さらに隔
壁も板面方向に圧縮されるために、その両側面に同様の
微小凹凸が形成される。この結果、熱媒体の流路となる
各孔部の4面に微小の凹凸が形成されるため、本来の隔
壁による伝熱効果とあいまって、より一層優れた伝熱効
率を有する熱交換器用チューブを得ることができる。
The present invention can be applied not only to the pipes shown in the above embodiment, but also to multi-hollow pipes and deformed pipes. Further, as shown in FIG. The present invention can also be applied to a flat multi-hole tube divided into a plurality of holes by a formed partition. When this flat multi-hole tube is subjected to the above-mentioned drawing without the interposition of a plug, the same minute irregularities are formed on the inner peripheral surface by first squeezing the outer peripheral side, and the partition walls are also formed on the plate surface. Because of the compression in the direction, similar minute irregularities are formed on both side surfaces. As a result, fine irregularities are formed on the four surfaces of each hole serving as a flow path of the heat medium, so that the heat exchanger tube having more excellent heat transfer efficiency can be combined with the heat transfer effect of the original partition walls. Obtainable.

【0017】[0017]

【発明の効果】以上説明したように、請求項1〜3のい
ずれかに記載の熱交換器用チューブおよび請求項4〜7
のいずれかに記載の当該熱交換器用チューブの製造方法
によれば、予め製品外径よりも大径に形成された管状部
材を、内部にプラグを介在させずに引抜加工することに
より、当該引抜加工によって、そのまま内面に長手方向
に向けて微小な凹凸が形成された熱交換器用チューブを
容易に製造することができる。そして、このようにして
得られた熱交換器用チューブは、上記微小凹凸によっ
て、内部を流れる熱媒体のチューブ壁面における流体剥
離効果が得られ、当該熱媒体の流れが乱流になるため
に、優れた伝熱効率を得ることができる。
As described above, the heat exchanger tube according to any one of claims 1 to 3 and the tubes 4 to 7 according to the invention.
According to the method for manufacturing a heat exchanger tube according to any one of (1) to (3), the drawing is performed by drawing a tubular member having a diameter larger than the product outer diameter in advance without interposing a plug therein. By processing, a heat exchanger tube in which minute irregularities are formed on the inner surface in the longitudinal direction as it is can be easily manufactured. The heat exchanger tube obtained in this manner is excellent because the fine irregularities provide a fluid separation effect on the tube wall surface of the heat medium flowing inside, and the flow of the heat medium becomes turbulent. Heat transfer efficiency can be obtained.

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

【図1】本発明の熱交換器用チューブの製造方法の一実
施形態において引抜加工前の状態を示す一部断面視した
側面図である。
FIG. 1 is a partially sectional side view showing a state before a drawing process in an embodiment of a method for manufacturing a heat exchanger tube of the present invention.

【図2】同、引抜加工の状態を示す側断面図である。FIG. 2 is a side sectional view showing a state of drawing processing.

【図3】製造された熱交換器用チューブを示す断面図で
ある。
FIG. 3 is a cross-sectional view showing the manufactured heat exchanger tube.

【図4】従来の熱交換器用チューブの製造方法を示す断
面視した模式図である。
FIG. 4 is a schematic cross-sectional view showing a method for manufacturing a conventional heat exchanger tube.

【図5】図5の製造方法により製造された熱交換器用チ
ューブを示す断面図である。
FIG. 5 is a sectional view showing a heat exchanger tube manufactured by the manufacturing method of FIG. 5;

【図6】一般的な偏平多穴チューブを示す要部の斜視図
である。
FIG. 6 is a perspective view of a main part showing a general flat multi-hole tube.

【符号の説明】[Explanation of symbols]

10 管状部材 11 ダイス 12 凹凸 15 熱交換器用チューブ Reference Signs List 10 tubular member 11 dice 12 irregularities 15 tube for heat exchanger

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 チューブ内面に、外径のしごき加工によ
って形成された凹凸が形成されていることを特徴とする
熱交換器用チューブ。
1. A tube for a heat exchanger, wherein irregularities formed by ironing an outer diameter are formed on an inner surface of the tube.
【請求項2】 上記チューブは、アルミニウムまたはア
ルミニウム合金からなることを特徴とする請求項1に記
載の熱交換器用チューブ。
2. The heat exchanger tube according to claim 1, wherein the tube is made of aluminum or an aluminum alloy.
【請求項3】 上記チューブは、内部が一体に形成され
た隔壁によって複数の孔部に分割された偏平多穴チュー
ブであることを特徴とする請求項1または2に記載の熱
交換器用チューブ。
3. The heat exchanger tube according to claim 1, wherein the tube is a flat multi-hole tube divided into a plurality of holes by a partition having an integrally formed inside.
【請求項4】 金属材料によって製品外径よりも大径の
管状部材を製造し、次いでこの管状部材を内部にプラグ
を介在させずに引抜加工して、外径のみをしごき加工す
ることにより、内面に凹凸を形成することを特徴とする
熱交換器用チューブの製造方法。
4. A tubular member having a diameter larger than the product outer diameter is manufactured from a metal material, and then the tubular member is drawn without a plug interposed therein, and ironing only the outer diameter is performed. A method for producing a tube for a heat exchanger, wherein irregularities are formed on an inner surface.
【請求項5】 上記金属材料は、アルミニウムまたはア
ルミニウム合金であり、かつ上記引抜加工を行なう前
に、O材処理することを特徴とする請求項4に記載の熱
交換器用チューブの製造方法。
5. The method for manufacturing a tube for a heat exchanger according to claim 4, wherein the metal material is aluminum or an aluminum alloy, and the material is treated with an O material before performing the drawing.
【請求項6】 アルミニウムまたはアルミニウム合金の
押出加工によって上記管状部材を製造し、押出された上
記管状部材を連続的に上記引抜加工することを特徴とす
る請求項4または5に記載の熱交換器用チューブの製造
方法。
6. The heat exchanger according to claim 4, wherein the tubular member is manufactured by extruding aluminum or an aluminum alloy, and the extruded tubular member is continuously subjected to the drawing process. Tube manufacturing method.
【請求項7】 上記管状部材は、押出加工された偏平多
穴チューブであることを特徴とする請求項4ないし6の
いずれかに記載の熱交換器用チューブの製造方法。
7. The method according to claim 4, wherein the tubular member is an extruded flat multi-hole tube.
JP3800698A 1998-02-04 1998-02-04 Tube for heat exchanger and its production Pending JPH11221639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3800698A JPH11221639A (en) 1998-02-04 1998-02-04 Tube for heat exchanger and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3800698A JPH11221639A (en) 1998-02-04 1998-02-04 Tube for heat exchanger and its production

Publications (1)

Publication Number Publication Date
JPH11221639A true JPH11221639A (en) 1999-08-17

Family

ID=12513499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3800698A Pending JPH11221639A (en) 1998-02-04 1998-02-04 Tube for heat exchanger and its production

Country Status (1)

Country Link
JP (1) JPH11221639A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100407637B1 (en) * 2001-07-27 2003-11-28 동환산업 주식회사 extrusion tube for heat exchanger and production device for extrusion tube
KR20140020702A (en) * 2012-08-09 2014-02-19 모다인 매뉴팩츄어링 컴파니 Heat exchanger tube, heat exchanger tube assembly, and methods of making the same
US9302337B2 (en) 2012-08-09 2016-04-05 Modine Manufacturing Company Heat exchanger tube, heat exchanger tube assembly, and methods of making the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100407637B1 (en) * 2001-07-27 2003-11-28 동환산업 주식회사 extrusion tube for heat exchanger and production device for extrusion tube
KR20140020702A (en) * 2012-08-09 2014-02-19 모다인 매뉴팩츄어링 컴파니 Heat exchanger tube, heat exchanger tube assembly, and methods of making the same
US9015923B2 (en) 2012-08-09 2015-04-28 Modine Manufacturing Company Heat exchanger tube, heat exchanger tube assembly, and methods of making the same
US9302337B2 (en) 2012-08-09 2016-04-05 Modine Manufacturing Company Heat exchanger tube, heat exchanger tube assembly, and methods of making the same

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