JPH0237294A - Heat transmission pipe - Google Patents
Heat transmission pipeInfo
- Publication number
- JPH0237294A JPH0237294A JP5705788A JP5705788A JPH0237294A JP H0237294 A JPH0237294 A JP H0237294A JP 5705788 A JP5705788 A JP 5705788A JP 5705788 A JP5705788 A JP 5705788A JP H0237294 A JPH0237294 A JP H0237294A
- Authority
- JP
- Japan
- Prior art keywords
- rib
- grooves
- spiral grooves
- heat exchanger
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title abstract 2
- 239000011324 bead Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 13
- 238000009833 condensation Methods 0.000 abstract description 8
- 230000005494 condensation Effects 0.000 abstract description 8
- 238000009835 boiling Methods 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002747 voluntary effect Effects 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、蒸発器、凝縮器等に用いられる伝熱管に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to heat transfer tubes used in evaporators, condensers, etc.
沸騰および凝縮を伴う熱伝達の際の熱伝達率が高く、か
つ圧力損出が少ない伝熱管として、内面にらせん溝を形
成した伝熱管が開発されている（実公昭５５−１４９５
６号他）。しかし、このらせん溝付伝熱管は、伝熱面に
おいて凝縮した液の排除が十分でな（、管内面における
凝縮伝熱効率が十分高くなかった。A heat exchanger tube with spiral grooves formed on its inner surface has been developed as a heat exchanger tube with a high heat transfer coefficient and low pressure loss during heat transfer involving boiling and condensation (Utility Model Act 1495-1983).
No. 6 and others). However, this spirally grooved heat transfer tube did not sufficiently remove the liquid condensed on the heat transfer surface (and the condensation heat transfer efficiency on the tube inner surface was not sufficiently high).
上記問題を解決するために、ぬれ難い部分をらせん溝と
交わるように設け、溝内の液の流れを止めて液膜を消失
させ、凝縮に有効な伝熱面を蒸気にさらすようにした伝
熱管が開発されている（特公昭５７−４１６７５号）。In order to solve the above problem, a difficult-to-wet part was provided to intersect with the spiral groove, the flow of liquid in the groove was stopped, the liquid film disappeared, and the heat transfer surface, which is effective for condensation, was exposed to steam. A heat tube has been developed (Special Publication No. 57-41675).
しかしながら、上記ぬれ稚い部分は四ふっ化エチレン樹
脂を被覆したり、貴金属をメツキしたりして形成してい
るため、伝熱管が細径の場合には形成が難しく、またコ
スト高となる難点がある。However, since the above-mentioned wet areas are formed by coating with polytetrafluoroethylene resin or plating with precious metals, it is difficult to form them when the heat transfer tube has a small diameter, and the cost is high. be.
この発明は、前記特公昭５７−４１６７５号に記載され
ているぬれ難い部分を設けた伝熱管をさらに改良し、ぬ
れ難い部分に代えて、溝内の液の流れを確実に遮断して
液膜を消失させ、その形成も容易な突条部を設けた伝熱
管を提供するものであり、その要旨とするところは、内
面にらせん溝と該らせん溝と交わる突条部を形成したこ
とを特徴とする伝熱管に存する。This invention further improves the heat exchanger tube provided with a hard-to-wet part described in Japanese Patent Publication No. 57-41675, and replaces the hard-to-wet part with a liquid film by reliably blocking the flow of liquid in the groove. The present invention provides a heat exchanger tube provided with a protrusion that eliminates the heat exchanger and that is easy to form.The main feature of the tube is that a helical groove and a protrusion that intersects with the helical groove are formed on the inner surface. Existing in heat exchanger tubes.
以下、図面によりこの発明の伝熱管について説明する。Hereinafter, the heat exchanger tube of the present invention will be explained with reference to the drawings.
第１図はこの発明の一実施例を示す一部切開斜視図、第
２図は第１図のＡ−Ａ断面図である。伝熱管ｌの内面に
らせんａ２およびらせん溝２と交わる突条部３を設ける
。突条部３０幅Ｗは管内周の長さＬの１０分の１以下が
望ましい。１０分の１より広くなると伝熱管の伝熱性能
が十分でなくなる。FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA in FIG. 1. A protrusion 3 intersecting with the helix a2 and the helical groove 2 is provided on the inner surface of the heat exchanger tube l. The width W of the protrusion portion 30 is desirably one-tenth or less of the length L of the inner circumference of the tube. If it is wider than 1/10, the heat transfer performance of the heat transfer tube will not be sufficient.
また、突条部３の高さＨはらせん溝２により形成される
山部４の高さ以下とするのが望ましい。突条部の高さＨ
が大きいと、伝熱管１を多数のフィン仮に挿通し、フィ
ン板に固定するために伝熱管内に拡管具を通す場合、拡
管具が通り難くなるとともに、拡管具により突条部が削
られ切粉が生じるとう問題もある。Further, it is desirable that the height H of the protrusion portion 3 be equal to or less than the height of the peak portion 4 formed by the spiral groove 2. Projection height H
If the heat exchanger tube 1 is temporarily inserted through a large number of fins and a tube expansion tool is passed through the heat exchanger tube to fix it to a fin plate, it will be difficult for the tube expansion tool to pass through, and the protrusion will be scraped and cut by the tube expansion tool. There is also the problem of powder formation.
管内のらせん溝と交わるように突条部を形成するには、
金属板の一面をロールにより溝付加工した後、溝付加工
面を内側にして金属板を管状に成形し、接合部を溶接す
ることにより伝熱管を製造すればよい。管軸方向に形成
される溶接部が突条部となり、突条部の形成を簡単に行
うことができる。To form a protrusion so that it intersects with the spiral groove inside the pipe,
A heat exchanger tube may be manufactured by grooving one side of a metal plate with a roll, forming the metal plate into a tube shape with the grooved surface facing inside, and welding the joints. The welded portion formed in the tube axis direction becomes the protrusion, and the protrusion can be easily formed.
前記溝付加工時、溝付加工と同時に複数本の突条部を形
成しておけば、第３図のごとく管内面にらせん溝と交わ
る複数本の突条部を有する伝熱管を製造することができ
る。If a plurality of protrusions are formed at the same time as the grooving process, a heat exchanger tube having a plurality of protrusions that intersect with the spiral grooves on the inner surface of the tube as shown in Fig. 3 can be manufactured. Can be done.
（作用〕
このように構成された伝熱管においては、とくに管内面
で蒸気が凝縮する場合、凝縮して生じた液膜はらせん溝
に沿って流れるが、突条部に当ったとき流れが遮断され
、蒸気流により飛ばされて液滴となって運び去られ溝内
の液がなくなる。従って、突条部と交わるごとに液のな
い有効な伝熱面が現出し、凝縮が促進される。また、ら
せん溝が沸騰の核となるため熱伝達率が向上し、沸騰効
率が大となる。(Function) In a heat exchanger tube configured in this way, especially when steam condenses on the inner surface of the tube, the liquid film formed by the condensation flows along the spiral groove, but the flow is interrupted when it hits the ridges. The liquid is blown away by the steam flow and carried away in the form of droplets, eliminating the liquid in the grooves.Therefore, each time it intersects with a protrusion, an effective heat transfer surface free of liquid appears, promoting condensation. In addition, since the spiral grooves serve as the core of boiling, the heat transfer coefficient is improved and the boiling efficiency is increased.
幅２５１ｍ、厚さ０．５ ｍｍのりん脱酸銅板を、表面
に溝を刻設したロールにより圧延して片面に溝付加工す
る。溝は板の長手方向に対し２０’ の傾斜角で形成さ
れ、溝深さ０．２鶴、溝の形状は台形、溝間の山部の形
状は頂角６０°の三角形、板厚は０．３０であった。溝
付加工した銅板を溝付加工面を内側にして成形ロールに
より円筒状に成形し、突き合せ部をＴＩＧ溶接により溶
接し管とした。A phosphorus-deoxidized copper plate with a width of 251 m and a thickness of 0.5 mm is rolled with a roll having grooves carved on its surface to form grooves on one side. The grooves are formed at an angle of inclination of 20' to the longitudinal direction of the plate, the groove depth is 0.2°, the shape of the groove is trapezoid, the shape of the peak between the grooves is a triangle with an apex angle of 60°, and the plate thickness is 0. It was .30. A grooved copper plate was formed into a cylindrical shape using forming rolls with the grooved surface facing inside, and the abutting portions were welded by TIG welding to form a tube.
この管を外径７ｆｌまで抽伸したところ、管内面にらせ
ん溝と交わる突条部（幅１ｍｍ、高さ０．２１■）を有
する伝熱管が得られた。When this tube was drawn to an outer diameter of 7 fl, a heat exchanger tube was obtained which had a protrusion (width 1 mm, height 0.21 square meters) intersecting with the spiral groove on the inner surface of the tube.
この発明の伝熱管は蒸発特性がすくれているとともに、
溝内の液の排除により凝縮性能が大幅に向上する。The heat exchanger tube of this invention has low evaporation characteristics, and
Condensation performance is greatly improved by eliminating liquid in the grooves.
第１図はこの発明の一実施例を示す一部切開斜視図、第
２図は第１図のＡ−Ａ線断面図、第３図は同じく他の実
施例を示す一部切開斜視図である。
ｌ・・・伝熱管 ２・・・らせん溝３・・・突
条部 ４・・・山部第１図
第２図
第３図
手続補正書
（自発）
（１）「特許請求の範囲」を別紙のとおり補正する。
平成１年１月１７日FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a partially cutaway perspective view showing another embodiment. be. l... Heat exchanger tube 2... Spiral groove 3... Projection 4... Mountain part Figure 1 Figure 2 Figure 3 Procedural amendment (voluntary) (1) "Claims" Correct as shown in the attached sheet. January 17, 1999
Claims (3)
成したことを特徴とする伝熱管。(1) A heat exchanger tube characterized in that a spiral groove and a protrusion intersecting with the spiral groove are formed on the inner surface.
、高さをらせん溝間の山部の高さ以下とした請求項１記
載の伝熱管。(2) The heat exchanger tube according to claim 1, wherein the width of the protrusion is one-tenth or less of the length of the inner circumference of the tube, and the height is less than or equal to the height of the peak between the spiral grooves.
の伝熱管。(3) The heat exchanger tube according to claim 1, wherein the protruding portion is formed by a weld bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5705788A JPH0237294A (en) | 1988-03-10 | 1988-03-10 | Heat transmission pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5705788A JPH0237294A (en) | 1988-03-10 | 1988-03-10 | Heat transmission pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0237294A true JPH0237294A (en) | 1990-02-07 |
| JPH0571874B2 JPH0571874B2 (en) | 1993-10-08 |
Family
ID=13044817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5705788A Granted JPH0237294A (en) | 1988-03-10 | 1988-03-10 | Heat transmission pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0237294A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704424A (en) * | 1995-10-19 | 1998-01-06 | Mitsubishi Shindowh Co., Ltd. | Heat transfer tube having grooved inner surface and production method therefor |
| US5915467A (en) * | 1997-01-17 | 1999-06-29 | Kabushiki Kaisha Kobe Seiko Sho | Heat transfer tube with grooves in inner surface of tube |
| US7845396B2 (en) * | 2007-07-24 | 2010-12-07 | Asia Vital Components Co., Ltd. | Heat dissipation device with coarse surface capable of intensifying heat transfer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126895A (en) * | 1974-08-29 | 1976-03-05 | Sangyo Kagaku Kenkyu Kyokai | Fukusokankarubonsan no seizoho |
| JPS6056418A (en) * | 1983-09-07 | 1985-04-02 | Sanou Kogyo Kk | Manufacture of grooved pipe |
| JPS61161572U (en) * | 1985-03-26 | 1986-10-06 |
-
1988
- 1988-03-10 JP JP5705788A patent/JPH0237294A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126895A (en) * | 1974-08-29 | 1976-03-05 | Sangyo Kagaku Kenkyu Kyokai | Fukusokankarubonsan no seizoho |
| JPS6056418A (en) * | 1983-09-07 | 1985-04-02 | Sanou Kogyo Kk | Manufacture of grooved pipe |
| JPS61161572U (en) * | 1985-03-26 | 1986-10-06 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704424A (en) * | 1995-10-19 | 1998-01-06 | Mitsubishi Shindowh Co., Ltd. | Heat transfer tube having grooved inner surface and production method therefor |
| US5915467A (en) * | 1997-01-17 | 1999-06-29 | Kabushiki Kaisha Kobe Seiko Sho | Heat transfer tube with grooves in inner surface of tube |
| US7845396B2 (en) * | 2007-07-24 | 2010-12-07 | Asia Vital Components Co., Ltd. | Heat dissipation device with coarse surface capable of intensifying heat transfer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0571874B2 (en) | 1993-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |