JPH04327792A - Copper tube with internal groove - Google Patents
Copper tube with internal grooveInfo
- Publication number
- JPH04327792A JPH04327792A JP12275891A JP12275891A JPH04327792A JP H04327792 A JPH04327792 A JP H04327792A JP 12275891 A JP12275891 A JP 12275891A JP 12275891 A JP12275891 A JP 12275891A JP H04327792 A JPH04327792 A JP H04327792A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- fins
- fin
- copper
- copper tube
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 27
- 239000010949 copper Substances 0.000 title claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 230000007423 decrease Effects 0.000 description 5
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000463 material Substances 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
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、例えば蒸発器、凝縮器
のような熱交換器の伝熱管として用いられる内面溝付銅
管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to internally grooved copper tubes used as heat exchanger tubes in heat exchangers such as evaporators and condensers.
【０００２】0002
【従来の技術】従来、沸騰および凝縮を伴う熱伝達装置
において、熱伝達効率が高く、圧力損失が少ない伝熱管
として内面に細かな凹凸フィンの溝条を形成した銅材質
のものが有用されている。通常、この内面溝付銅管はア
ルミニウムのプレートフィンに固定して熱交換器に構成
されるが、この固定化は図４に示すように内面溝付銅管
１の外面にプレートフィン２を装着しておき、前記内面
溝付銅管１の内部にプラグ３を圧入して拡管することに
より両部材を密着させる工程でおこなわれる。[Prior Art] Conventionally, in heat transfer devices involving boiling and condensation, a copper material with fine grooves of concave and convex fins formed on the inner surface has been used as a heat transfer tube with high heat transfer efficiency and low pressure loss. There is. Normally, this internally grooved copper tube is fixed to aluminum plate fins to form a heat exchanger, but this fixation is achieved by attaching plate fins 2 to the outer surface of the internally grooved copper tube 1, as shown in Figure 4. The plug 3 is then press-fitted into the internally grooved copper tube 1 to expand the tube, thereby bringing the two members into close contact with each other.
【０００３】ところが、従来の内面溝付銅管に形成され
る溝条は、図５のようにフィン４の形状が先端の尖った
三角型断面を呈している関係で、拡管プラグの圧入時に
フィンの先端部分が押し潰されて図６のような状態に変
形する事態が発生する。このようなフィン変形は熱伝達
性の低下を招くため、拡管工程の前後で伝熱性能の減退
変動を生じる問題点がある。However, the grooves formed in conventional internally grooved copper tubes have a triangular cross-section with a pointed tip as shown in FIG. A situation occurs in which the tip portion of the blade is crushed and deformed into the state shown in FIG. Since such fin deformation causes a decrease in heat transfer performance, there is a problem in that heat transfer performance decreases and fluctuates before and after the tube expansion process.
【０００４】0004
【発明が解決しようとする課題】本発明は、フィン形状
を特定の略台形断面に設計することにより上記の問題点
の解消を図ったもので、拡管工程の前後でフィン形状に
大きな減退変動を伴うことがない安定した高伝熱性能を
備える内面溝付銅管の提供を目的としている。[Problems to be Solved by the Invention] The present invention aims to solve the above-mentioned problems by designing the fin shape to have a specific approximately trapezoidal cross section, and the fin shape has large reduction fluctuations before and after the pipe expansion process. The purpose of the present invention is to provide an internally grooved copper tube with stable and high heat transfer performance without heat transfer.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
めの本発明による内面溝付銅管は、銅管の内面に、高さ
（Ｈ） ０．１５〜０．２５ｍｍ、先端フラット幅（Ｗ
） ０．０６〜０．１ｍｍ 、頂角 （γ） ２０〜３
０°の先端が平面で略台形断面を有するフィンを多数条
形成したなることを構成上の特徴とする。[Means for Solving the Problems] The internally grooved copper tube according to the present invention for achieving the above object has a height (H) of 0.15 to 0.25 mm and a tip flat width ( W
) 0.06~0.1mm, vertex angle (γ) 20~3
A structural feature is that a large number of fins are formed with a flat tip at 0° and a substantially trapezoidal cross section.
【０００６】図１は本発明に係る先端が平面で略台形断
面を有するフィン形状を示した部分断面図である。銅管
内面に多数条のフィンを形成するための加工手段には特
に制約はなく、形成される溝方向も管軸に沿って平行な
ストレート溝であっても、また螺旋溝や傾斜溝であって
も差し支えない。しかし、銅管のサイズは外径が６〜１
０ｍｍの比較的小径管が本発明の好適な対象となる。FIG. 1 is a partial sectional view showing a fin shape having a flat tip and a substantially trapezoidal cross section according to the present invention. There are no particular restrictions on the processing means for forming multiple fins on the inner surface of a copper tube, and the direction of the grooves may be straight grooves parallel to the tube axis, spiral grooves, or inclined grooves. There is no problem. However, the size of copper pipe has an outer diameter of 6 to 1
Relatively small diameter tubes of 0 mm are suitable targets for the present invention.
【０００７】本発明において、フィンの高さＨを０．１
５〜０．２５ｍｍに限定した理由は、０．１５ｍｍ未満
に設定しようとすると現形状で最も伝熱性能が良好なフ
ィン面積 （フィン頂角４０°） より少なくするため
にはフィン頂角を２０°未満にする必要が生じ、フィン
成形が著しく困難となり、他方、０．２５ｍｍを越える
高さになると伝熱性能の向上よりも圧力損失の方が大き
くなって構造機能の低下を招くためである。先端フラッ
ト幅Ｗは、０．０６ｍｍを下廻ると拡管工程で先端部分
の押し潰れを軽減することができなくなり、０．１ｍｍ
を越えるとフィン面積が増大して溝面積を縮小化する
ことになる関係で伝熱性能を実質的に低下させるうえ、
単位重量も増えてコストアップの因となる。また、頂角
γについては、２０°未満になるとフィンの成形加工が
著しく困難となり、３０°を上廻る角度設定では先端を
平面にしてもフィン面積が大きくなって伝熱性能の低下
と重量増を招く。In the present invention, the height H of the fin is set to 0.1
The reason for limiting it to 5 to 0.25 mm is that if you try to set it to less than 0.15 mm, the fin area has the best heat transfer performance in the current shape (fin apex angle of 40°). If the height exceeds 0.25 mm, the pressure loss will be greater than the improvement in heat transfer performance, leading to a decline in structural function. . If the tip flat width W is less than 0.06 mm, it will not be possible to reduce the crushing of the tip part during the tube expansion process, and it will be reduced to 0.1 mm.
Exceeding this will increase the fin area and reduce the groove area, which will substantially reduce heat transfer performance.
The unit weight also increases, leading to an increase in cost. Regarding the apex angle γ, if it is less than 20°, it becomes extremely difficult to form the fin, and if the angle is set over 30°, the fin area becomes large even if the tip is made flat, resulting in a decrease in heat transfer performance and an increase in weight. invite.
【０００８】[0008]
【作用】上記の特定されたフィン構成を備える本発明の
内面溝付銅管は、フィン形状が従来形状のフィンに比べ
て伝熱性能に遜色がないうえ、先端部が平面であるため
プレートフィンと組み合わせて熱交換器を製作する場合
の拡管工程で押し潰される変形度合が効果的に軽減され
る。したがって、拡管工程後における伝熱性能の減退変
動が僅少となり、常に安定した高性能の熱交換器を提供
することが可能となる。[Function] The internally grooved copper tube of the present invention having the above-specified fin structure has a fin shape that is comparable in heat transfer performance to conventional fins, and has a flat tip, so plate fins When manufacturing a heat exchanger in combination with this, the degree of deformation caused by crushing during the tube expansion process is effectively reduced. Therefore, fluctuations in heat transfer performance after the tube expansion process are minimized, making it possible to provide a consistently stable and high-performance heat exchanger.
【０００９】[0009]
【実施例】以下、本発明を実施例に基づいて説明する。
実施例
平均外径７．００ｍｍ、平均内径６．１１ｍｍの銅管内
面に高さ（Ｈ）０．２２ｍｍ 、先端フラット幅（Ｗ）
０．０８ｍｍ 、頂角 （γ）２６ °、底肉厚０．２
３ｍｍ、溝幅０．２３ｍｍ、リード角１８°、条数５０
の先端が平面で略台形断面を有するフィンを形成した内
面溝付銅管を、アルミニウムのプレートフィンに拡管工
程を介して装着して熱交換器を製作した。この管の単管
での伝熱性能を表１に示した。また、拡管工程の前後に
おける内面溝付銅管の蒸発時の伝熱性能対比グラフを図
２に、また凝縮時の伝熱性能対比グラフを図３に示した
。EXAMPLES The present invention will be explained below based on examples. Example: The inner surface of a copper tube with an average outer diameter of 7.00 mm and an average inner diameter of 6.11 mm has a height (H) of 0.22 mm and a flat tip width (W).
0.08mm, apex angle (γ) 26°, bottom wall thickness 0.2
3mm, groove width 0.23mm, lead angle 18°, number of threads 50
A heat exchanger was manufactured by attaching an internally grooved copper tube having a fin with a flat tip and a substantially trapezoidal cross section to an aluminum plate fin through a tube expansion process. Table 1 shows the heat transfer performance of this tube as a single tube. Further, FIG. 2 shows a comparison graph of the heat transfer performance during evaporation of the internally grooved copper tube before and after the tube expansion process, and FIG. 3 shows a comparison graph of the heat transfer performance during condensation.
【００１０】0010
【表１】[Table 1]
【００１１】表１の結果から本発明の内面溝付銅管は極
めて優れた性能を示し、熱交換器とした場合の伝熱性能
は従来フィン形状の内面溝付銅管を用いた場合に比べて
約２％の性能向上が認められた。また、図２および図３
のグラフから拡管工程の前後において伝熱性能に殆ど減
退変動が生じないことが判明する。[0011] From the results shown in Table 1, the internally grooved copper tube of the present invention exhibits extremely excellent performance, and when used as a heat exchanger, the heat transfer performance is higher than that when a conventional fin-shaped internally grooved copper tube is used. Approximately 2% performance improvement was observed. Also, Figures 2 and 3
It is clear from the graph that there is almost no decline in heat transfer performance before and after the tube expansion process.
【００１２】0012
【発明の効果】以上のとおり、本発明の内面溝付銅管に
は特定された寸法の先端が平面で略台形断面を有するフ
ィン形状が形成されているから、熱交換器製造時の拡管
工程におけるフィン先端の潰れ現象が効果的に軽減され
、常にフィン形成時と同等の高伝熱性能を安定して確保
することができる。このため、伝熱管を一層小径化する
ことが可能となるから、熱交換器のコンパクトに設計す
ることが可能となる。[Effects of the Invention] As described above, since the internally grooved copper tube of the present invention has a fin shape having a flat tip and a substantially trapezoidal cross section with specified dimensions, it is possible to improve the tube expansion process during heat exchanger manufacturing. This effectively reduces the phenomenon of collapse of the fin tips during fin formation, and it is possible to consistently maintain high heat transfer performance equivalent to that when the fins are formed. For this reason, it becomes possible to further reduce the diameter of the heat exchanger tube, and thus it becomes possible to design the heat exchanger compactly.
【図１】本発明を構成するフィン形状を示した部分断面
図である。FIG. 1 is a partial sectional view showing a fin shape constituting the present invention.
【図２】実施例における拡管工程前後の蒸発伝熱性能を
示した対比グラフである。FIG. 2 is a comparative graph showing the evaporative heat transfer performance before and after the tube expansion step in the example.
【図３】実施例における拡管工程前後の凝縮伝熱性能を
示した対比グラフである。FIG. 3 is a comparison graph showing the condensation heat transfer performance before and after the tube expansion step in the example.
【図４】内面溝付銅管の拡管工程を示した説明図である
。FIG. 4 is an explanatory diagram showing a tube expansion process of an internally grooved copper tube.
【図５】従来フィン形状における拡管工程前の状態を示
した部分断面図である。FIG. 5 is a partial cross-sectional view showing a conventional fin-shaped tube before the tube expansion process.
【図６】従来フィン形状における拡管工程後の変形状態
を示した部分断面図である。FIG. 6 is a partial cross-sectional view showing a deformed state of a conventional fin-shaped pipe after a tube expansion process.
１ 内面溝付銅管 ２ プレートフィン ３ 拡管用プラグ ４ フィン 1 Copper tube with inner groove 2 Plate fin 3 Plug for pipe expansion 4 Fin
Claims (1)
〜０．２５ｍｍ、先端フラット幅 （Ｗ）０．０６〜０
．１ｍｍ 、頂角 （γ）２０〜３０°の先端が平面で
略台形断面を有するフィンを多数条形成してなることを
特徴とする内面溝付銅管。[Claim 1] The inner surface of the copper tube has a height (H) of 0.15.
~0.25mm, tip flat width (W)0.06~0
．． A copper tube with internal grooves, characterized in that it is formed with a large number of fins each having a diameter of 1 mm, an apex angle (γ) of 20 to 30 degrees, a flat tip, and a substantially trapezoidal cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12275891A JPH04327792A (en) | 1991-04-25 | 1991-04-25 | Copper tube with internal groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12275891A JPH04327792A (en) | 1991-04-25 | 1991-04-25 | Copper tube with internal groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04327792A true JPH04327792A (en) | 1992-11-17 |
Family
ID=14843888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12275891A Pending JPH04327792A (en) | 1991-04-25 | 1991-04-25 | Copper tube with internal groove |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04327792A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085278A (en) * | 1994-06-20 | 1996-01-12 | Mitsubishi Shindoh Co Ltd | Heat transfer tube with inner surface grooves |
| JPH0849992A (en) * | 1994-08-04 | 1996-02-20 | Sumitomo Light Metal Ind Ltd | Heat transfer tube with internal groove |
| WO2001092806A1 (en) * | 2000-05-31 | 2001-12-06 | Mitsubishi Shindoh Co., Ltd. | Heating tube with internal grooves and heat exchanger |
| EP2278252A1 (en) * | 2008-04-24 | 2011-01-26 | Mitsubishi Electric Corporation | Heat exchanger and air conditioner using the same |
| CN112964113A (en) * | 2021-03-18 | 2021-06-15 | 中科金龙金属材料开发有限公司 | Combined-tooth heat exchange copper pipe |
-
1991
- 1991-04-25 JP JP12275891A patent/JPH04327792A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH085278A (en) * | 1994-06-20 | 1996-01-12 | Mitsubishi Shindoh Co Ltd | Heat transfer tube with inner surface grooves |
| JPH0849992A (en) * | 1994-08-04 | 1996-02-20 | Sumitomo Light Metal Ind Ltd | Heat transfer tube with internal groove |
| WO2001092806A1 (en) * | 2000-05-31 | 2001-12-06 | Mitsubishi Shindoh Co., Ltd. | Heating tube with internal grooves and heat exchanger |
| EP2278252A1 (en) * | 2008-04-24 | 2011-01-26 | Mitsubishi Electric Corporation | Heat exchanger and air conditioner using the same |
| EP2278252B1 (en) * | 2008-04-24 | 2013-08-14 | Mitsubishi Electric Corporation | Heat exchanger and air conditioner using the same |
| CN112964113A (en) * | 2021-03-18 | 2021-06-15 | 中科金龙金属材料开发有限公司 | Combined-tooth heat exchange copper pipe |
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