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WO2000062001A1 - Tube de transfert thermique avec rainures internes et son procede de fabrication - Google Patents

Tube de transfert thermique avec rainures internes et son procede de fabrication Download PDF

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Publication number
WO2000062001A1
WO2000062001A1 PCT/JP2000/002300 JP0002300W WO0062001A1 WO 2000062001 A1 WO2000062001 A1 WO 2000062001A1 JP 0002300 W JP0002300 W JP 0002300W WO 0062001 A1 WO0062001 A1 WO 0062001A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat transfer
transfer tube
grooves
groove
engraving
Prior art date
Application number
PCT/JP2000/002300
Other languages
English (en)
Japanese (ja)
Inventor
Hirokazu Fujino
Kazushige Kasai
Kanji Akai
Noriaki Okamoto
Masaru Uchimitsu
Original Assignee
Daikin Industries, 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 Daikin Industries, Ltd. filed Critical Daikin Industries, Ltd.
Priority to AU36748/00A priority Critical patent/AU746338B2/en
Priority to EP00915441A priority patent/EP1087198A4/fr
Publication of WO2000062001A1 publication Critical patent/WO2000062001A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • 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

Definitions

  • the present invention relates to a structure of a heat transfer tube having an inner surface groove having a groove on an inner peripheral surface of a tube main body.
  • a heat transfer tube of a heat exchanger such as an evaporator or a condenser for an air conditioner is conventionally disclosed in Japanese Patent Application Laid-Open No. 9-42881 from the viewpoint of improving the heat transfer coefficient.
  • a spiral groove is provided on the inner peripheral surface of the pipe to increase the heat transfer area and to increase the stirring effect by making the refrigerant flowing in the pipe into an annular flow.
  • the condensation action progresses to a certain extent, the liquid film portion becomes substantially uniformly distributed in the tube, and the thickness gradually increases, so that the heat resistance and diffusion are increased.
  • the resistance increases and the heat transfer performance decreases.
  • the inner circumferential surface of the pipe is divided into a plurality of regions in the circumferential direction. It has been proposed to provide a plurality of rows of V-shaped grooves that are symmetrical in the pipe axis direction and have equal width in the circumferential direction.
  • the flow resistance is large.
  • the refrigerant is used as a heat transfer tube for an evaporator, the pressure loss is high. However, a sufficient heat transfer performance improving action cannot be obtained.
  • the effect of making the distribution of refrigerant uneven by the V-shaped groove is small.
  • the liquid refrigerant cannot be supplied sufficiently in the circumferential direction of the tube, so that the effect of promoting heat transfer performance cannot be obtained. In other words, performance improvement cannot be expected depending on the area of use.
  • the invention of the present application has been made to solve such a problem.
  • the present invention is applicable.
  • An object of the present invention is to provide a heat transfer tube with an inner groove having improved heat transfer performance as much as possible, and a method and apparatus for manufacturing the same.
  • Each of the inventions of the present application is configured to have the following problem solving means in order to achieve the above object.
  • the heat transfer tube with an inner surface groove according to the invention of claim 1 of the present application is characterized in that a plurality of rows of V-shaped grooves 3, 3 are provided on the inner peripheral surface 2 of the tube main body 1a symmetrically in the tube axis direction.
  • the width of the V-shaped groove 3 in the circumferential direction is unequal.
  • the heat transfer tube with an inner groove according to the invention of claim 2 of the present application is the same as the structure of the invention described in claim 1, except that the plurality of rows of V-shaped grooves 3, 3,. At least a part of the ridges 5 formed between them has a secondary groove 6, 6 of a predetermined depth from the top 5a side to the base 5b side. Is formed.
  • a plurality of rows of V-shaped grooves 3, 3 When at least a part of the formed ridges 5, 5 ⁇ ⁇ ⁇ are formed with secondary grooves 6, 6 '' of a predetermined depth from the top 5 a side to the bottom 5 b side, the two The flow resistance of the refrigerant flowing through the pipe is reduced by the secondary grooves 6, 6, and so the pressure loss is reduced, and the heat transfer performance is effectively improved even when the refrigerant flow rate is small.
  • the heat transfer tube with an inner groove according to the invention of claim 3 of the present application is characterized in that, in the configuration of the invention according to claim 2, the secondary grooves 6, 6 are formed as spiral notches. It is.
  • the flow resistance of the refrigerant flowing through the pipe is effectively reduced by the secondary grooves 6, 6 ', which are formed by the notched grooves in the same spiral direction, and the swirl component in the spiral direction is further increased.
  • the heat transfer performance is further improved.
  • the heat transfer tube with an inner surface groove according to the invention of claim 5 of the present application is the same as the structure of the invention described in claim 1, except that the plurality of rows of V-shaped grooves 3, 3 A feature is that at least a part of the ridges 5, 5... Formed between them is formed with a secondary groove 7, 7,. .
  • the heat transfer tube with an inner groove according to the invention of claim 5 of the present application is the structure of the invention according to claim 4, wherein the secondary groove 7, 7- It is characterized by a fine groove extending from the other side to the other side.
  • the method for manufacturing a heat transfer tube with an inner groove includes a first stamping roll 11 for stamping a plurality of rows of V-shaped grooves 3 on a heat transfer tube material 13 in a flat state.
  • the plurality of V-shaped grooves 3, 3 ⁇ 'each groove 3, 3 ⁇ ' at least a portion of the convex ridges 5, 5 ⁇ formed on the secondary groove 7,
  • a second engraved lane 12 engraved with 7 'and a roll forming device 17 for forming the flat heat transfer tube material 13 into a cylindrical tube the flat heat transfer tube material is used.
  • the first and second engraving rolls 1 1 and 1 2 successively form a plurality of rows of V-shaped grooves 3, 3, and the secondary grooves 7, 7,. , And then roll-formed by the roll forming device 17 to form a cylindrical tube.
  • the first and second stamping rolls 11 and 12 are combined in the moving direction of the heat transfer tube material 13 in a flat plate state, and stamping is sequentially performed in two stages.
  • the heat transfer tube with an inner groove having the structure according to the first, fourth, or fifth aspect of the present invention can be easily manufactured.
  • the apparatus for manufacturing a heat transfer tube with an inner groove comprises a first stamping roll 1 1 that stamps a plurality of rows of V-shaped grooves 3, 3. And the secondary groove is formed in at least a part of the ridges 5, 5, ⁇ formed between the V-shaped grooves 3, 3, '' in the plurality of rows.
  • a roll forming device 17 for forming the flat heat transfer tube material 13 into a cylindrical tube are combined with the flat heat transfer tube.
  • the V-shaped grooves 3, 3- ⁇ 'and the secondary grooves 7, 7 ⁇ are sequentially arranged by the first and second engraving rolls 1 1 and 1 2 in parallel in the moving direction of the material 13.
  • the method is characterized in that, after continuous engraving at the stage, a roll is formed by the roll forming device 17 to form a cylindrical tube.
  • the first and second stamping rolls 11 and 12 are combined in the moving direction of the heat transfer tube material 13 in a flat plate state, and are sequentially stamped in two stages. It is possible to easily manufacture the heat transfer tube with the inner surface groove having the configuration of the invention of claim 1, 4 or 5.
  • the heat exchanger can be configured as either a condenser or an evaporator or as an evaporator. Therefore, even when the flow rate of the refrigerant is small, the pressure loss, the thermal resistance in the heat transfer tube, and the dispersion resistance are reduced, and a heat exchanger with sufficiently high heat transfer performance can be provided.
  • FIG. 1 is a diagram showing a partially expanded structure of a tube main body of an internally grooved heat transfer tube according to Embodiment 1 of the present invention.
  • FIG. 2 is an enlarged view of a main part of the inner peripheral surface of the pipe main body.
  • FIG. 3 is a perspective view of a cut portion of a main part of the inner peripheral surface of the pipe main body.
  • FIG. 4 is an enlarged view showing a structure of a main part of an inner peripheral surface of a tube main body of an internally grooved heat transfer tube according to Embodiment 2 of the present invention.
  • FIG. 5 is an enlarged perspective view of the main part.
  • FIG. 6 is a perspective view of a cut portion of a main part of the inner peripheral surface of the pipe main body.
  • FIG. 7 is an enlarged view showing a structure of a main part of an inner peripheral surface of a tube main body of an internally grooved heat transfer tube according to Embodiment 3 of the present invention.
  • FIG. 8 is an enlarged perspective view of a cut portion of the main part.
  • FIG. 9 is a perspective view showing a configuration of a manufacturing method and a manufacturing apparatus of the heat transfer tube with inner grooves according to Embodiment 2 of the present invention.
  • FIG. 1 to 3 show the structure of the heat transfer tube with inner grooves according to Embodiment 1 of the present invention.
  • the inner grooved heat transfer tube 1 flows through the inside of the tube main body 1a on the inner peripheral surface 2 of the tube main body 1a.
  • the main groove is symmetrical in the pipe axis direction, If the first to fifth rows of grooves A to E, which are composed of V-shaped grooves 3, 3 Are arranged in the circumferential direction It is provided.
  • Reference numeral 5 in FIG. 3 denotes a convex ridge formed between the V-shaped grooves 3, 3,..., 5 a denotes a top thereof, and 5 b denotes a base thereof. .
  • the grooves In order to reduce the flow resistance of the grooves as much as possible and reduce the pressure loss, they are formed to have a predetermined lead angle 0, a predetermined depth H, and a predetermined number of steps N. Therefore, when used as a heat transfer tube for an evaporator and the flow rate of the refrigerant is small, the pressure loss is effectively reduced and the heat transfer performance is improved.
  • the refrigerant in the pipe has a swirling flow component like a conventional spiral groove pipe. As a result, even when the flow velocity of the refrigerant is low, the refrigerant is effectively supplied in the pipe circumferential direction, so that the heat transfer promoting effect is not impaired.
  • the heat transfer tube 1 with an inner groove is configured such that the turbulence of the refrigerant liquid flowing in the tube body 1a is formed on the inner peripheral surface 2 of the tube body 1a having the same electric resistance welded pipe structure as described above.
  • the main groove is symmetrical in the pipe axis direction and unequal in the circumferential direction in order to promote fluidization and to form a dense portion by splitting or merging with the refrigerant liquid to promote thinning of the refrigerant liquid.
  • the first to fifth rows of grooves A to E which are composed of relatively sharp V-shaped grooves 3, 3- It is provided.
  • Reference numerals 5 in FIGS. 5 and 6 denote convex ridges formed between the V-shaped grooves 3, 3, 3..., 5 a denotes a top thereof, and 5 b denotes a base thereof. Each is shown.
  • a secondary groove 6 is formed from the top 5a to the base 5b.
  • the secondary groove 6 is formed by a spiral notch having a predetermined depth d with a predetermined depth d.
  • the V-shaped grooves 3, 3 ⁇ ⁇ ⁇ ⁇ of each of the first to fifth groove groups A to E reduce the flow resistance of the grooves as much as possible to reduce the pressure loss.
  • the predetermined lead angle 0 and the predetermined It is formed with a depth H and a predetermined number N of rows. Therefore, when used as a heat transfer tube for an evaporator, the pressure loss is effectively reduced and the heat transfer performance is improved even when the power and coolant flow rate are small.
  • the refrigerant in the pipe has a swirling flow component like a conventional spiral groove pipe. Then, even when the flow rate of the refrigerant is small and the flow velocity of the refrigerant is low, the refrigerant is effectively supplied in the pipe circumferential direction, so that the heat transfer promoting effect is not impaired.
  • FIG. 7 to 9 show the structure of a heat transfer tube with an inner surface groove according to Embodiment 3 of the present invention and the configuration of a manufacturing apparatus for performing a method of manufacturing the heat transfer tube, respectively.
  • the inner surface grooved heat transfer tube 1 according to the present embodiment, turbulence of the inner peripheral surface 2 of the tube body 1 a similar electric-resistance-welded pipe structure as described above, the refrigerant liquid flowing through the pipe body 1 in a
  • the main groove is symmetrical in the pipe axis direction and unequal in the circumferential direction in order to promote fluidization and to form a dense portion by splitting or merging with the refrigerant liquid to promote thinning of the refrigerant liquid.
  • a plurality of first to fifth rows of groove groups A to E composed of V-shaped grooves 3 having a relatively sharp shape are provided in the circumferential direction.
  • Reference numerals 5 in FIGS. 7 and 8 denote convex ridges formed between the V-shaped grooves 3, 3..., 5a denotes a top thereof, and 5b denotes a base thereof. Each is shown. In the case of this embodiment, one side of the outer peripheral surface of the ridges 5, 5.
  • a secondary groove 7, 7 consisting of a fine groove, for example, in a spiral direction, having a predetermined depth is provided on the other side of the force, so that the flow resistance of the refrigerant is reduced. Further, the component in the turning direction is also increased.
  • the V-shaped grooves 3 of the first to fifth groove groups A to E reduce the flow resistance of the grooves as much as possible to reduce the pressure loss.
  • a fine groove of a predetermined depth extending in a spiral direction from one side to the other side, for example. ′, And has a predetermined lead angle 0, a predetermined depth H, and a predetermined number N of the same as in the first embodiment. Therefore, when used as a heat transfer tube for an evaporator and the flow rate of the refrigerant is small, the pressure loss is effectively reduced and the heat transfer performance is improved. Also, even when the pipe is expanded, the fine grooves on the side are not collapsed, and the heat transfer performance is not reduced.
  • the refrigerant in the pipe has a swirling flow component like the conventional spiral groove pipe.
  • the lead angle 0, the groove depth H, and the number N of the V-shaped grooves 3, 3 In addition to setting the flow resistance to a value that reduces the flow resistance, the V-shaped grooves 3, 3 Secondary grooves 7, 7,... Formed of, for example, fine grooves extending in the spiral direction are provided on the other side surface. Accordingly, the flow resistance can be reduced as much as possible to reduce the pressure loss, and the spiral component of the refrigerant flow in the spiral direction can be further increased. A high-performance heat exchanger tube for a heat exchanger can be obtained. Also, even when the pipe is expanded, the fine grooves on the side are not collapsed, and the heat transfer performance does not decrease.
  • An internally grooved heat transfer tube having a structure having • can be easily manufactured by the following manufacturing method using, for example, a manufacturing apparatus as shown in FIG.
  • reference numeral 11 denotes a first marking roll having a marking processing surface 11 a corresponding to the first to fifth plural rows of V-shaped groove groups A to E as the above-described main grooves.
  • 1 2 correspond to the convex ridges 5, 5, formed between the V-shaped grooves 3, 3, of each of the first to fifth plural rows of grooves A to E.
  • a second engraving roll having an engraved surface 12a for engraving fine grooves 7, 7 extending from one side to the other side, for example, extending in a spiral direction.
  • a heat tube material, 16 is a heating device for heating and softening the heat transfer tube material 13 during roll forming, and 14 is a pressurizing plate-like heat transfer tube material 13 between the first engraving roll 11 and 14.
  • a first pressure roller, 15 is a second pressure roller for pressing the flat heat transfer tube material 13 with the second engraving roll 12, and 17 is the first pressure roller, 17.
  • Second time The first to fifth rows of V-shaped groove groups A to E and the secondary grooves 7, 7, ⁇ force S are formed via the rolls 11 and 12 respectively, and the heating device 16
  • a roll forming apparatus having a roll forming hole 17a for forming the heat-transfer tube material 13 heated and softened in the above into a tubular shape, the first stamping roll 11 and the first pressing roller 14 ,
  • the second engraving roll 12 and the second pressing roller 15, the heating device 16, and the roll forming device 17 are sequentially determined in the moving direction (see the arrow) of the heat transfer tube material 13. Are arranged side by side at intervals.
  • the first marking roll 11 and the first pressure roller 1 for marking the first to fifth plural rows of V-shaped groove groups A to E are provided. 4 and a part of the convex ridges 5, 5, 'formed between the grooves 3, 3,''of the V-shaped groove groups A to E in the first to fifth rows.
  • the heat transfer tube material 1 3 After continuously engraving the V-shaped groove groups A to E of the groove groups A to E and the secondary grooves 7, 7,... In two stages, the heat transfer tube material 1 3 After heating and softening with heating device 16, the above roll It can be formed into a cylindrical tube by mouth forming with a forming device 17.
  • the first and second stamping rolls 11 and 12 are combined in the moving direction of the heat transfer tube material 13 in a flat state, and are sequentially stamped in two stages. By simply doing so, it is possible to easily manufacture a heat transfer tube with an inner surface groove having a configuration as shown in FIGS. 7 and 8.
  • the ERW pipe type heat transfer tube is described as an example.However, the inner groove structure of each of the above embodiments is similarly applied to, for example, a seam pipe type heat transfer tube. It goes without saying that it can be done.
  • the heat transfer tube with an inner groove, the method of manufacturing the same, and the device for manufacturing the same according to the present invention are useful for heat transfer tubes of a heat exchanger, and particularly, the transfer of an evaporator and a condenser for an air conditioner. Suitable for use in heat tubes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Cette invention concerne un tube de transfert thermique avec rainures internes. Sur la surface périphérique interne (2) du corps principal (1a) de ce tube, on trouve de multiples rangées de rainures en forme de V (3) disposées symétriquement par rapport au sens axial dudit tube, cependant que des rainures secondaires (6) et (7) d'une profondeur déterminée sont formées dans une partie des régions en saillie (5) séparant les rainures en V (3) dans le but de réduire la perte de pression. Comme la largeur des rangées multiples de striures en V (3) varie d'une rangée à l'autre dans le sens de la circonférence, on obtient une composante tourbillonnaire en sens spirale qui permet de régler correctement le débit même faible du réfrigérant dans le tube et de maximiser le transfert thermique.
PCT/JP2000/002300 1999-04-08 2000-04-10 Tube de transfert thermique avec rainures internes et son procede de fabrication WO2000062001A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU36748/00A AU746338B2 (en) 1999-04-08 2000-04-10 Heat transfer tube with internal grooves and method and device for manufacturing the tube
EP00915441A EP1087198A4 (fr) 1999-04-08 2000-04-10 Tube de transfert thermique avec rainures internes et son procede de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10076799A JP3296325B2 (ja) 1999-04-08 1999-04-08 内面溝付伝熱管
JP11/100767 1999-04-08

Publications (1)

Publication Number Publication Date
WO2000062001A1 true WO2000062001A1 (fr) 2000-10-19

Family

ID=14282656

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/002300 WO2000062001A1 (fr) 1999-04-08 2000-04-10 Tube de transfert thermique avec rainures internes et son procede de fabrication

Country Status (5)

Country Link
EP (1) EP1087198A4 (fr)
JP (1) JP3296325B2 (fr)
CN (1) CN1313947A (fr)
AU (1) AU746338B2 (fr)
WO (1) WO2000062001A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10210016B9 (de) * 2002-03-07 2004-09-09 Wieland-Werke Ag Wärmeaustauschrohr mit berippter Innenoberfläche
KR100752636B1 (ko) * 2006-05-02 2007-08-29 삼성광주전자 주식회사 냉장고용 열교환기 및 그 튜브의 제조방법
EP2645040B1 (fr) * 2012-03-28 2017-06-21 ABB Research Ltd. Échangeur de chaleur pour convertisseurs de traction
CN104708292A (zh) * 2015-03-02 2015-06-17 金龙精密铜管集团股份有限公司 传热管的加工方法
CN104949564A (zh) * 2015-07-08 2015-09-30 赤峰宝山能源（集团）贺麒铜业有限责任公司 一种直齿高低齿内螺纹传热管

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JPS5560089U (fr) * 1978-10-12 1980-04-23
JPH02165875A (ja) * 1988-12-16 1990-06-26 Furukawa Electric Co Ltd:The 伝熱管およびその製造方法
JPH04288197A (ja) 1991-03-18 1992-10-13 Hitachi Ltd 洗濯機の洗濯制御方法
JPH04339530A (ja) * 1991-05-16 1992-11-26 Kobe Steel Ltd 伝熱管およびその製造方法
JPH1047880A (ja) * 1996-08-06 1998-02-20 Kobe Steel Ltd 内面溝付き伝熱管
JPH10206060A (ja) * 1997-01-17 1998-08-07 Kobe Steel Ltd 管内面溝付伝熱管
JPH1183368A (ja) * 1997-09-17 1999-03-26 Hitachi Cable Ltd 内面溝付伝熱管
JPH1190530A (ja) * 1997-09-25 1999-04-06 Sumitomo Light Metal Ind Ltd 伝熱管の製造方法及び製造装置

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JPS6447880A (en) * 1987-08-18 1989-02-22 Nippon Steel Corp Stainless steel having ceramics layer on surface
JP3292043B2 (ja) * 1995-06-19 2002-06-17 株式会社日立製作所 熱交換器
US5791405A (en) * 1995-07-14 1998-08-11 Mitsubishi Shindoh Co., Ltd. Heat transfer tube having grooved inner surface
JP3199636B2 (ja) * 1996-05-30 2001-08-20 住友軽金属工業株式会社 内面溝付伝熱管

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Publication number Priority date Publication date Assignee Title
JPS5560089U (fr) * 1978-10-12 1980-04-23
JPH02165875A (ja) * 1988-12-16 1990-06-26 Furukawa Electric Co Ltd:The 伝熱管およびその製造方法
JPH04288197A (ja) 1991-03-18 1992-10-13 Hitachi Ltd 洗濯機の洗濯制御方法
JPH04339530A (ja) * 1991-05-16 1992-11-26 Kobe Steel Ltd 伝熱管およびその製造方法
JPH1047880A (ja) * 1996-08-06 1998-02-20 Kobe Steel Ltd 内面溝付き伝熱管
JPH10206060A (ja) * 1997-01-17 1998-08-07 Kobe Steel Ltd 管内面溝付伝熱管
JPH1183368A (ja) * 1997-09-17 1999-03-26 Hitachi Cable Ltd 内面溝付伝熱管
JPH1190530A (ja) * 1997-09-25 1999-04-06 Sumitomo Light Metal Ind Ltd 伝熱管の製造方法及び製造装置

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Title
See also references of EP1087198A4 *

Also Published As

Publication number Publication date
CN1313947A (zh) 2001-09-19
EP1087198A1 (fr) 2001-03-28
AU3674800A (en) 2000-11-14
JP2000292088A (ja) 2000-10-20
AU746338B2 (en) 2002-04-18
EP1087198A4 (fr) 2005-04-27
JP3296325B2 (ja) 2002-06-24

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