JPH02165875A - Heat exchanger tube and its manufacture - Google Patents
Heat exchanger tube and its manufactureInfo
- Publication number
- JPH02165875A JPH02165875A JP31773388A JP31773388A JPH02165875A JP H02165875 A JPH02165875 A JP H02165875A JP 31773388 A JP31773388 A JP 31773388A JP 31773388 A JP31773388 A JP 31773388A JP H02165875 A JPH02165875 A JP H02165875A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- tube
- exchanger tube
- grooves
- parallel
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001704 evaporation Methods 0.000 abstract description 10
- 230000008020 evaporation Effects 0.000 abstract description 8
- 238000009833 condensation Methods 0.000 abstract description 5
- 230000005494 condensation Effects 0.000 abstract description 5
- 238000012546 transfer Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 239000003507 refrigerant Substances 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
- F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
- F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、冷凍機用、空調機用等の熱交換器に用いられ
る伝熱管およびその製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat exchanger tube used in a heat exchanger for refrigerators, air conditioners, etc., and a method for manufacturing the same.
一般に、冷凍機や空調機の熱交換器に用いられる伝熱管
は、管内にフレオン等の冷媒液を流し、熱交換を行わせ
るもので、熱交換器の高効率化や省エネルギー化の観点
から内面溝付伝熱管の使用が多くなっている。この内面
溝付伝熱管は、管内に微細な三角形や台形等の断面をも
つ溝を、管軸に対して平行にもしくはらせん状に形成し
たのもであって、平滑管に比べて伝熱面積が増加するこ
とや、冷媒液を攪拌させる作用があるなどの利点があり
、伝熱性能は大きく向上する。Generally, heat transfer tubes used in heat exchangers for refrigerators and air conditioners exchange heat by flowing a refrigerant liquid such as Freon inside the tube. Grooved heat exchanger tubes are increasingly being used. These internally grooved heat transfer tubes have minute grooves with triangular or trapezoidal cross sections formed inside the tube, parallel to the tube axis or spirally, and have a larger heat transfer area than smooth tubes. It has the advantage of increasing the amount of water and stirring the refrigerant liquid, and the heat transfer performance is greatly improved.
近年、特に、空調機用熱交損器に対しては、高性能化や
小型軽量化の要求が強く、ヒートポンプ式エアコンの普
及もあいまって、伝熱管としては高性能化がより一層強
く要求されている。In recent years, there has been a strong demand for higher performance, smaller size and lighter weight, especially for heat exchangers for air conditioners, and with the spread of heat pump air conditioners, there has been an even stronger demand for higher performance for heat exchanger tubes. ing.
しかし、従来の内面溝付伝熱管では、溝数、リード角、
溝深さ、溝形状等積々の改良が行なわれているものの、
性能向上にはおのずと限界があった。However, with conventional internally grooved heat exchanger tubes, the number of grooves, lead angle,
Although many improvements have been made to groove depth, groove shape, etc.
There were naturally limits to performance improvement.
一方、これらの要求に応えるために、従来の内面溝付伝
熱管に代わって、管の内面に金属粉粒体を焼結して、多
孔質層を形成した伝熱管が開発されている。On the other hand, in order to meet these demands, a heat exchanger tube in which a porous layer is formed by sintering metal powder on the inner surface of the tube has been developed in place of the conventional heat exchanger tube with internal grooves.
この伝熱管は、管内蒸発時に、形成されている多孔質層
により核沸騰が促進されて、伝熱性能は大幅に向上する
が、管内凝縮時に、凝縮した冷媒液が多孔質層内に滞留
したり、ときには撹拌されずに管内表面に液膜を形成し
て、伝熱性能が向上しない場合があった。In this heat transfer tube, when evaporating inside the tube, the formed porous layer promotes nucleate boiling, and the heat transfer performance is greatly improved. However, when condensing inside the tube, the condensed refrigerant liquid stays in the porous layer. In some cases, a liquid film was formed on the inner surface of the tube without stirring, and heat transfer performance was not improved.
また、この伝熱管は、製造工程が多いうえ、長尺物の加
工においては、多孔質層を均一に形成することが困難な
ため、伝熱性能等にバラツキが発生するなどの欠点があ
った。In addition, this heat transfer tube requires many manufacturing steps, and it is difficult to form a porous layer uniformly when processing long objects, so there are drawbacks such as variations in heat transfer performance. .
本発明の目的は、蒸発性能、凝縮性能がともによく、し
かもそれらのバラツキの少ない伝熱管を提供することで
ある。An object of the present invention is to provide a heat exchanger tube that has good evaporation performance and condensation performance and less variation in them.
さらに他の目的は、そのような伝熱管を長尺に容易に加
工できる伝熱管の製造方法を提供することである。Still another object is to provide a method for manufacturing a heat exchanger tube that can easily process such a heat exchanger tube into a long length.
〔課題を解決するための手段）
前記課題を解決するために、本発明による伝熱管は、管
内面の管軸に対して平行にもしくはらせん状に連続して
形成された微細な多数の内面溝を有する伝熱管において
、前記内面溝のフィン部や溝底部に、平行もしくは交差
するように、互いに異なる方向をもつ多数の切込みを形
成する構成としである。[Means for Solving the Problems] In order to solve the above problems, the heat exchanger tube according to the present invention has a large number of fine inner grooves formed continuously in a spiral shape or parallel to the tube axis on the inner surface of the tube. The heat exchanger tube has a structure in which a large number of cuts in mutually different directions are formed in the fin portion and the groove bottom of the inner groove so as to be parallel or intersect with each other.
また、本発明による伝熱管の製造方法は、管内面の管軸
に対して平行にもしくはらせん状に、互いに平行な多数
の溝を形成し、それらの溝に平行もしくは交差する互い
に平行な他の多数の溝を１回以上形成することにより、
管内面に多数の突起部または凹部を形成し、それらの突
起部または凹部を潰しながら、管内面の管軸に対して平
行にもしくはらせん状に連続して内面溝を形成すること
により、前記内面溝のフィン部や溝底部に、平行もしく
は交差するように、互いに異なる方向をもつ多数の切込
みを形成する構成としである。Further, the method for manufacturing a heat exchanger tube according to the present invention includes forming a large number of mutually parallel grooves in parallel or spirally with respect to the tube axis on the inner surface of the tube, and forming other mutually parallel grooves parallel to or intersecting with these grooves. By forming a large number of grooves one or more times,
By forming a large number of protrusions or recesses on the inner surface of the tube, and while crushing these protrusions or recesses, forming an inner groove on the inner surface of the tube parallel to the tube axis or continuously in a spiral shape, the inner surface of the tube can be improved. The structure is such that a large number of parallel or intersecting cuts in different directions are formed in the fin portion of the groove or the bottom of the groove.
本発明による伝熱管は、多数の切込みによって空孔部が
できるので、従来の内面溝付伝熱管に比較して、冷媒液
の蒸発時の核沸騰を大福に向上させることができる。こ
れは、多孔質層を形成した伝熱管と略同等の蒸発性能と
なる。Since the heat exchanger tube according to the present invention has voids formed by a large number of cuts, the nucleate boiling during evaporation of the refrigerant liquid can be greatly improved compared to the conventional heat exchanger tube with internal grooves. This results in approximately the same evaporation performance as that of a heat exchanger tube with a porous layer formed thereon.
また、管内＠縮時においては、基本的には、内面溝が形
成されているため、′ａ縮した冷媒液は適度に攪拌され
て、液膜を形成することがなく、空孔部によりさらに攪
拌され、従来の内面溝付伝熱管に比較して凝縮性能が向
上する。In addition, when the inside of the pipe is compressed, basically an inner groove is formed, so that the compressed refrigerant liquid is appropriately stirred and does not form a liquid film. This improves condensation performance compared to conventional internally grooved heat exchanger tubes.
さらに、本発明による伝熱管の製造方法は、基本的には
、従来の内面溝付伝熱管の製造時の溝加工を複数回繰り
返すだけで、略同じ装置を使用して、長尺物の加工もバ
ラツキ無しに製造できるようになった。Furthermore, the method for manufacturing a heat exchanger tube according to the present invention basically requires only repeating the grooving process multiple times during the manufacture of conventional internally grooved heat exchanger tubes, and uses substantially the same equipment to process long objects. can now be manufactured without any variation.
以下、図面等を参照して、実施例につき、本発明の詳細
な説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings and the like.
第１図は、本発明による伝熱管の実施例を示した図であ
って、第１Ａ図は伝熱管の内面を展開して示した図、第
１Ｂ図は伝熱管の一部を拡大して示した断面図である。FIG. 1 is a diagram showing an embodiment of a heat exchanger tube according to the present invention, in which FIG. 1A is an expanded view of the inner surface of the heat exchanger tube, and FIG. 1B is an enlarged view of a part of the heat exchanger tube. FIG.
伝熱管１は、その内面に複数の微細な内面溝１１が形成
されている。この内面溝１１は、管内面に連続して設け
られており、管軸に対して平行にもしくはらせん状に形
成されている。The heat exchanger tube 1 has a plurality of fine inner grooves 11 formed on its inner surface. This inner surface groove 11 is provided continuously on the inner surface of the tube, and is formed parallel to the tube axis or in a spiral shape.
この伝熱管ｌの内面には、多数本の切込み１２が形成さ
れている。切込み１２は、互いに異なる方向に形成され
ており、内面溝１１のフィン部工１ａや溝底部１１ｂに
、互いに平行にもしくは交差するように形成されている
。この切込み１２により、伝熱管ｌの内面に多数の空孔
部が形成される。A large number of cuts 12 are formed on the inner surface of the heat exchanger tube l. The cuts 12 are formed in mutually different directions, and are formed in the fin part 1a of the inner groove 11 and the groove bottom 11b so as to be parallel to each other or to cross each other. This cut 12 forms a large number of holes on the inner surface of the heat exchanger tube l.
第２図は、本発明による伝熱管の製造方法の実施例を説
明するための図である。FIG. 2 is a diagram for explaining an embodiment of the method for manufacturing a heat exchanger tube according to the present invention.
伝熱管１は、鋼管等の素管１０を用いて、製造装置１２
により製造することができる。The heat exchanger tube 1 is manufactured using a manufacturing device 12 using a raw tube 10 such as a steel tube.
It can be manufactured by
製造装置２は、素管１０の外側に配置され素管１０の径
を絞る縮径ダイス２１と、素管１０の内側に縮径ダイス
２１に対向して設けられたフローティングプラグ２２と
、そのフローティングプラグ２２に連結棒２３により素
管ｌＯ内の一定の位置に保持された第１〜第３溝付プラ
グ２４〜２６と、素管１０の外側の第１〜第３溝付プラ
グ２４〜２６に対向する位置に配置され公転しながら素
管１０を縮径加工する第１〜第３転造ローラ２７〜２９
とから構成されている。The manufacturing apparatus 2 includes a diameter-reducing die 21 arranged outside the raw pipe 10 to reduce the diameter of the raw pipe 10, a floating plug 22 provided inside the raw pipe 10 facing the diameter-reducing die 21, and a floating The plug 22 has first to third grooved plugs 24 to 26 held at fixed positions inside the raw pipe 10 by a connecting rod 23, and first to third grooved plugs 24 to 26 outside the raw pipe 10. The first to third rolling rollers 27 to 29 are arranged at opposing positions and perform a diameter reduction process on the raw pipe 10 while rotating.
It is composed of.
まず、第１溝付プラグ２４と第１転造ローラ２７および
第２溝付プラグ２５と第２転遣ローラ２８とにより、素
管１０内に微細な多数の略四角錐や鋸刃状の突起を形成
する０次に、第３溝付プラグ２６と第３転造ローラ２９
とにより、内面溝１１を形成する。First, the first grooved plug 24, the first rolling roller 27, the second grooved plug 25, and the second rolling roller 28 form a large number of fine approximately quadrangular pyramidal or saw blade-shaped projections in the raw pipe 10. Next, the third grooved plug 26 and the third rolling roller 29
Thus, the inner groove 11 is formed.
ここで、第３溝付プラグ２６を用いて、内面溝１１を形
成するときに、前工程までに形成されている略四角錐や
鋸刃状の突起を押し潰すようにして、内面溝１１を主と
して形成するようにする。Here, when forming the inner groove 11 using the third grooved plug 26, the inner groove 11 is formed by crushing the substantially square pyramid or saw blade-shaped protrusions formed in the previous step. Mainly to form.
このため、内面溝１１によって成形されるフィン部１１
ａや溝底部ｌｌｂに、略四角錐や鋸刃状の突起が押し潰
された形で、平行もしくは交差した切込み１２が形成さ
れ、そこに多数の空孔部が形成される。Therefore, the fin portion 11 formed by the inner groove 11
Parallel or intersecting notches 12 are formed in the shape of substantially square pyramidal or saw blade-shaped protrusions crushed in a and the groove bottom llb, and a large number of holes are formed therein.
この実施例では、第１溝付プラグ２４として、溝数９０
、リード角２８度（右ねじり）、溝深さ０．１５ｍｍの
ものを用い、第２溝付プラグ２５として、溝数８０、リ
ード角２０度（左ねじり）、溝深さＯ，１０ｍｍのもの
を用い、第３溝付プラグ２６として、溝数６０、リード
角１８度（右ねじり）、溝深さ０．２０ｍｍのものを用
い、素管１０として鋼管を用いて溝加工した結果、溝数
６０、リード角１８度（右ねじり）、溝深さ０．２０ｍ
ｍの内面溝１１を得た。その後、図示しない空引きダイ
スを通して、外径φ９．５３ｍｍの伝熱管１を得た。得
られた伝熱管１の内面には、第１図に示すように、内面
溝１１のフィン部１１ａおよび溝底部１１ｂに多数の切
込み１２が交差するように成形されていた。In this embodiment, the first grooved plug 24 has 90 grooves.
, a plug with a lead angle of 28 degrees (right-handed twist) and a groove depth of 0.15 mm is used, and the second grooved plug 25 has a number of grooves of 80, a lead angle of 20 degrees (left-handed twist), and a groove depth of O, 10 mm. The third grooved plug 26 had a groove count of 60, a lead angle of 18 degrees (right-handed twist), and a groove depth of 0.20 mm.As a result of grooving using a steel pipe as the base pipe 10, the number of grooves was 60, lead angle 18 degrees (right-handed twist), groove depth 0.20 m
An inner groove 11 of m was obtained. Thereafter, the heat exchanger tube 1 having an outer diameter of 9.53 mm was obtained by passing through a dry die (not shown). As shown in FIG. 1, a large number of cuts 12 were formed on the inner surface of the obtained heat exchanger tube 1 so as to intersect with the fin portion 11a and the groove bottom portion 11b of the inner groove 11.
第３図、第４図は、本発明による伝熱管の実施例の管内
蒸発性能、管内凝縮性能をそれぞれ示した図である。FIG. 3 and FIG. 4 are diagrams respectively showing the evaporation performance and condensation performance within the tube of an example of the heat exchanger tube according to the present invention.
製造した伝熱管１は、二重管式熱交換器を用いて伝熱測
定した０本発明による内面溝付伝熱管の特性（Ａ）は、
第３図、第４図に示すように、従来の内面溝付伝熱管の
特性（Ｂ）に比較して、管内蒸発性能で約１００％、管
内ｌｉ！縮性能で約７０％程度性能が向上した。The heat transfer of the produced heat exchanger tube 1 was measured using a double tube heat exchanger. The characteristics (A) of the internally grooved heat exchanger tube according to the present invention are as follows:
As shown in Figures 3 and 4, compared to the characteristics (B) of the conventional internally grooved heat exchanger tube, the tube evaporation performance is approximately 100%, and the tube li! The compression performance improved by about 70%.
この伝熱測定で使用した従来の内面溝付伝熱管は、外径
φ９．５３ｍｍ、溝数６０．リード角１８度、溝深さ０
．２０ｍｍのものを用いた。The conventional internally grooved heat exchanger tube used in this heat transfer measurement had an outer diameter of φ9.53 mm and a groove count of 60. Lead angle 18 degrees, groove depth 0
．． A 20 mm one was used.
第５図は、本発明による伝熱管の製造方法の他の実施例
を説明するための図である。FIG. 5 is a diagram for explaining another embodiment of the method for manufacturing a heat exchanger tube according to the present invention.
第２図に示した製造装置は、素管１０を転造する例を示
したが、この実施例では、帯板３０を用いて、製造装置
４により伝熱管３を製造したものである。The manufacturing apparatus shown in FIG. 2 shows an example of rolling the raw tube 10, but in this embodiment, the heat exchanger tube 3 is manufactured by the manufacturing apparatus 4 using the strip plate 30.
帯板３０は、らせん状の溝を有する第１溝付ローラ４１
とフラットローラ４４および第２溝付ローラ４２とフラ
ットローラ４５とにより、帯板３０の片面に微細な多数
の略四角錐や鋸刃状の突起を形成する０次に、第３溝付
ローラ４３とフラットローラ４６とにより、内面溝３１
を形成する。The band plate 30 has a first grooved roller 41 having a spiral groove.
A third grooved roller 43 forms a large number of fine substantially quadrangular pyramidal or saw blade-shaped protrusions on one side of the strip plate 30 by the flat roller 44, the second grooved roller 42, and the flat roller 45. and the flat roller 46, the inner groove 31
form.
このとき、第３溝付ローラ４３では、内面溝３１を形成
するときに、前工程までに形成されている略四角錐や鋸
刃状の突起を押し潰すようにして、内面溝３１を形成す
る。At this time, when the third grooved roller 43 forms the inner groove 31, the inner groove 31 is formed by crushing the substantially square pyramid or saw blade-shaped protrusions formed in the previous process. .
次に、成形ローラ群４７ａ〜４７ｈにより、管状に成形
し、続いて誘導コイル４日により高周波誘導溶接を施し
たのち、スクイズロール４９ａ。Next, it is formed into a tubular shape by a group of forming rollers 47a to 47h, and then high-frequency induction welding is performed using an induction coil for four days, and then the squeeze roll 49a is formed.
４９ｂを通して、伝熱管３を製造した。得られた伝熱管
３には、第１図と同様に、内面溝３１に多数の切込み３
２が形成されていた。49b, the heat exchanger tube 3 was manufactured. The obtained heat exchanger tube 3 has a large number of cuts 3 in the inner groove 31, as shown in FIG.
2 was formed.
以上説明した実施例にとられれることなく、種々の変形
を施すことができる。Various modifications can be made without being limited to the embodiments described above.
ここで説明した実施例では、２回の溝加工によリ、略四
角錐や鋸刃状の突起を形成するようにしたが、２回目の
溝加工で内面溝が形成されるようにしてもよい。In the embodiment described here, the substantially square pyramid or saw blade-shaped protrusions are formed by grooving twice, but it is also possible to form inner grooves in the second grooving. good.
また、２回目の溝加工後の管内形状は、いかなる形状で
あってもよく、内面溝を主として形成する溝加工のとき
に、２回目までの溝加工後に形成された突起部もしくは
溝部等を押し潰してしまうようにすればよい、そして、
１回目と２回目の溝加工によるそれぞれの溝の形状（連
敗、リード角。Furthermore, the shape of the inside of the pipe after the second groove machining may be any shape, and when grooving mainly forms internal grooves, the protrusions or grooves formed after the second groove machining are pressed. All you have to do is destroy it, and
The shape of each groove (losing streak, lead angle) from the first and second groove machining.
溝深さ等）を適宜選択することにより、第１図に示すよ
うな管内面に平行もしくは交差するような切込みが入り
、それらが多数の空孔部を形成するようになればよい。By appropriately selecting the groove depth, etc., parallel or intersecting cuts may be made on the inner surface of the tube as shown in FIG. 1, and these may form a large number of holes.
また、この実施例では、３回の溝加工により内面溝を形
成した例を説明したが、溝加工の回数は３回に限らず、
４回、５回またはそれ以上でもよく、最終の溝加工時に
、内面溝を加工して多重交差の切込みを形成するように
してもよい。In addition, in this embodiment, an example was explained in which the inner groove was formed by grooving three times, but the number of grooving is not limited to three times.
It may be four, five or more times, and the internal groove may be machined to form multiple intersecting cuts during the final groove machining.
なお、第５図に示したローラ群４７ａ〜４７ｈを用いて
帯板を管加工したのち、第２図に示した製造装置２で溝
加工してもよい。Note that after the strip plate is pipe-processed using the roller groups 47a to 47h shown in FIG. 5, the groove may be processed using the manufacturing apparatus 2 shown in FIG. 2.
以上詳しく説明したように、本発明によれば、伝熱管の
内面溝のフィン部や溝底部に、交差する切込みを多数入
れ、空孔を形成するようにしたので、蒸発、ａｍの両特
性を大幅に向上させることができた。従って、ヒートポ
ンプタイプの伝熱管として、好適に使用できる。As explained in detail above, according to the present invention, a large number of intersecting cuts are made in the fin portion and the groove bottom of the inner groove of the heat exchanger tube to form holes, thereby improving both the evaporation and am characteristics. I was able to improve it significantly. Therefore, it can be suitably used as a heat pump type heat exchanger tube.
また、製造方法は、従来の内面溝付伝熱管と略同様にし
て製造できるので、容易に長尺物の加工が行えるなど、
工業上極めて有用である。In addition, since the manufacturing method is almost the same as that of conventional internally grooved heat exchanger tubes, long products can be easily processed, etc.
It is extremely useful industrially.
第Ｆ図は、本発明による伝熱管の実施例を示した図であ
って、第１Ａ図は伝熱管の内面を展開して示した図、第
１Ｂ図は伝熱管の一部を拡大して示した断面図である。
第２図は、本発明による伝熱管の製造方法の実施例を説
明するための図である。
第３図、第４図は、本発明による伝熱管の実施例の管内
蒸発性能、管内凝縮性能をそれぞれ示した図である。
第５図は、本発明による伝熱管の製造方法の他の実施例
を説明するための図である。
１・・・伝熱管
１１・・・内面溝
１１ａ・・・フィン部 １１ｂ・・・溝底部１２
・・・切込み
２・・・製造装置
２１・・・縮径ダイス
２２・・・フローティングプラグ
２３・・・連結棒
２４〜２６・・・第１〜第３溝付プラグ２７〜２９・・
・第１〜第３転遣ローラ３・・・伝熱管
３１・・・内面溝 ３２・・・切込み４・・
・製造装置
４１〜４３・・・第１〜第３溝付ローラ４４〜４６・・
・フラットローラ
４７ａ〜４７ｈ・・・成形ローラ群
４８・・・誘導コイル
第
１Ａ
図
１１ｔ）
第
Ｂ
図FIG. F is a diagram showing an embodiment of the heat exchanger tube according to the present invention, FIG. 1A is an expanded view of the inner surface of the heat exchanger tube, and FIG. 1B is an enlarged view of a part of the heat exchanger tube. FIG. FIG. 2 is a diagram for explaining an embodiment of the method for manufacturing a heat exchanger tube according to the present invention. FIG. 3 and FIG. 4 are diagrams respectively showing the evaporation performance in the tube and the condensation performance in the tube of an example of the heat exchanger tube according to the present invention. FIG. 5 is a diagram for explaining another embodiment of the method for manufacturing a heat exchanger tube according to the present invention. 1... Heat exchanger tube 11... Inner groove 11a... Fin portion 11b... Groove bottom 12
... Cutting depth 2 ... Manufacturing equipment 21 ... Diameter reducing die 22 ... Floating plug 23 ... Connecting rods 24 to 26 ... First to third grooved plugs 27 to 29 ...
・First to third transfer rollers 3...Heat transfer tube 31...Inner groove 32...Notch 4...
・Manufacturing devices 41 to 43...first to third grooved rollers 44 to 46...
・Flat rollers 47a to 47h... Forming roller group 48... Induction coil 1A Fig. 11t) Fig. B
Claims (2)
連続して形成された微細な多数の内面溝を有する伝熱管
において、前記内面溝のフィン部や溝底部に、平行もし
くは交差するように、互いに異なる方向をもつ多数の切
込みを形成したことを特徴とする伝熱管。(1) In a heat exchanger tube having a large number of fine inner grooves formed parallel to the tube axis on the inner surface of the tube or continuously in a spiral shape, the grooves are parallel to or intersect with the fins or groove bottoms of the inner grooves. A heat exchanger tube characterized in that a large number of cuts are formed in mutually different directions.
、互いに平行な多数の溝を形成し、それらの溝に平行も
しくは交差する互いに平行な他の多数の溝を１回以上形
成することにより、管内面に多数の突起部または凹部を
形成し、それらの突起部または凹部を潰しながら、管内
面の管軸に対して平行にもしくはらせん状に連続して内
面溝を形成することにより、前記内面溝のフィン部や溝
底部に、平行もしくは交差するように、互いに異なる方
向をもつ多数の切込みを形成するようにした伝熱管の製
造方法。(2) A large number of mutually parallel grooves are formed parallel to or spirally with respect to the tube axis on the inner surface of the tube, and many other mutually parallel grooves that are parallel to or intersect with these grooves are formed one or more times. By forming a large number of protrusions or recesses on the inner surface of the tube, and while crushing those protrusions or recesses, forming an inner groove on the inner surface of the tube parallel to the tube axis or continuously in a spiral shape. A method for manufacturing a heat exchanger tube, comprising forming a large number of parallel or intersecting cuts in mutually different directions in the fin portions and groove bottoms of the internal grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31773388A JPH02165875A (en) | 1988-12-16 | 1988-12-16 | Heat exchanger tube and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31773388A JPH02165875A (en) | 1988-12-16 | 1988-12-16 | Heat exchanger tube and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02165875A true JPH02165875A (en) | 1990-06-26 |
Family
ID=18091435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31773388A Pending JPH02165875A (en) | 1988-12-16 | 1988-12-16 | Heat exchanger tube and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02165875A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259448A (en) * | 1991-07-09 | 1993-11-09 | Mitsubishi Shindoh Co., Ltd. | Heat transfer tubes and method for manufacturing |
| US5975196A (en) * | 1994-08-08 | 1999-11-02 | Carrier Corporation | Heat transfer tube |
| WO2000062001A1 (en) * | 1999-04-08 | 2000-10-19 | Daikin Industries, Ltd. | Heat transfer tube with internal grooves and method and device for manufacturing the tube |
| US6167950B1 (en) | 1994-11-17 | 2001-01-02 | Carrier Corporation | Heat transfer tube |
| US6176301B1 (en) * | 1998-12-04 | 2001-01-23 | Outokumpu Copper Franklin, Inc. | Heat transfer tube with crack-like cavities to enhance performance thereof |
| JP2007225272A (en) * | 2006-02-22 | 2007-09-06 | Wieland Werke Ag | Structured heat-exchanger tube, and manufacturing method therefor |
| KR100905509B1 (en) * | 2007-11-16 | 2009-07-01 | 지앤티소결 주식회사 | Heat exchanging panel of the sinter metal |
| WO2015007386A1 (en) * | 2013-07-17 | 2015-01-22 | Rollwalztechnik Abele + Höltich GmbH | Device for machining a workpiece |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61125595A (en) * | 1984-11-20 | 1986-06-13 | Furukawa Electric Co Ltd:The | Heat transfer tube for boiling and manufacture thereof |
| JPS6264421A (en) * | 1985-09-13 | 1987-03-23 | Kobe Steel Ltd | Manufacture of heat exchanger tube |
| JPS62182595A (en) * | 1986-02-06 | 1987-08-10 | Furukawa Electric Co Ltd:The | Heat transfer tube and manufacture thereof and plug with groove for manufacturing it |
-
1988
- 1988-12-16 JP JP31773388A patent/JPH02165875A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61125595A (en) * | 1984-11-20 | 1986-06-13 | Furukawa Electric Co Ltd:The | Heat transfer tube for boiling and manufacture thereof |
| JPS6264421A (en) * | 1985-09-13 | 1987-03-23 | Kobe Steel Ltd | Manufacture of heat exchanger tube |
| JPS62182595A (en) * | 1986-02-06 | 1987-08-10 | Furukawa Electric Co Ltd:The | Heat transfer tube and manufacture thereof and plug with groove for manufacturing it |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259448A (en) * | 1991-07-09 | 1993-11-09 | Mitsubishi Shindoh Co., Ltd. | Heat transfer tubes and method for manufacturing |
| US5975196A (en) * | 1994-08-08 | 1999-11-02 | Carrier Corporation | Heat transfer tube |
| US6167950B1 (en) | 1994-11-17 | 2001-01-02 | Carrier Corporation | Heat transfer tube |
| US6176301B1 (en) * | 1998-12-04 | 2001-01-23 | Outokumpu Copper Franklin, Inc. | Heat transfer tube with crack-like cavities to enhance performance thereof |
| WO2000062001A1 (en) * | 1999-04-08 | 2000-10-19 | Daikin Industries, Ltd. | Heat transfer tube with internal grooves and method and device for manufacturing the tube |
| EP1087198A1 (en) * | 1999-04-08 | 2001-03-28 | Daikin Industries, Ltd. | Heat transfer tube with internal grooves and method and device for manufacturing the tube |
| EP1087198A4 (en) * | 1999-04-08 | 2005-04-27 | Daikin Ind Ltd | Heat transfer tube with internal grooves and method and device for manufacturing the tube |
| JP2007225272A (en) * | 2006-02-22 | 2007-09-06 | Wieland Werke Ag | Structured heat-exchanger tube, and manufacturing method therefor |
| KR100905509B1 (en) * | 2007-11-16 | 2009-07-01 | 지앤티소결 주식회사 | Heat exchanging panel of the sinter metal |
| WO2015007386A1 (en) * | 2013-07-17 | 2015-01-22 | Rollwalztechnik Abele + Höltich GmbH | Device for machining a workpiece |
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