EP0659500A1 - Verfahren zum Biegen eines Rohrs mit länglichem Querschnitt und Wärmetauscher mit Rohren mit länglichem Querschnitt und Gebogen in U-Form - Google Patents
Verfahren zum Biegen eines Rohrs mit länglichem Querschnitt und Wärmetauscher mit Rohren mit länglichem Querschnitt und Gebogen in U-Form Download PDFInfo
- Publication number
- EP0659500A1 EP0659500A1 EP94117924A EP94117924A EP0659500A1 EP 0659500 A1 EP0659500 A1 EP 0659500A1 EP 94117924 A EP94117924 A EP 94117924A EP 94117924 A EP94117924 A EP 94117924A EP 0659500 A1 EP0659500 A1 EP 0659500A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- section
- cross
- limbs
- connecting portion
- 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
Images
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/14—Twisting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
- B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
- F28D1/0478—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag the conduits having a non-circular cross-section
-
- 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
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
Definitions
- the present invention relates to a method of bending a pipe having an oblong cross-section for heat exchangers.
- the object of the present invention is to provide a method of bending a pipe having an oblong cross-section in a U-shaped arrangement which permits the two limbs of the pipe to be placed in a position in which the longer axes of the respective cross-sections are aligned with or parallel to one another without causing excessive stretching of the material in the bending zone.
- this object is achieved by a method characterised by the stages of:
- the present invention also relates to a heat exchanger comprising a stack of fins fixed to a plurality of pipes having an oblong cross-section, in which each pipe has two straight limbs and a curved connecting portion, the heat exchanger being characterised in that the longer axes of the respective cross-sections of the two straight limbs of each pipe are aligned with or parallel to one another, and in that the connecting portion has an oblong cross-section with a longer axis at a right-angle to the longer axes of the cross-sections of the straight limbs.
- the pipe is indicated by the reference numeral 2 whilst the longer axis of the cross-section of the pipe is indicated 4.
- a reinforcing core 6 consisting of a flexible element of a shape such that it freely and slidingly engages the hole in the pipe is inserted in the initially straight pipe 2.
- the reinforcing core 6 is inserted over a length such that it extends over at least the entire pipe-bending zone.
- a relative rotation substantially equal to 180° of two limbs 2a, 2b of the pipe 2 is caused about a bending axis 8 parallel to the axis 4 of the cross-section of the pipe ( Figure 3).
- the pipe 2 is bent by a known tool comprising a wheel having a radius equal to the radius of curvature of the pipe and a movable shaping member which urges the pipe against the edge of the wheel, creating the curved connecting portion 2c between the two straight limbs 2a, 2b.
- the two straight limbs 2a, 2b are located with the longer axes 4 of the respective cross-sections parallel to one another.
- the reinforcing core 6 is partially removed such that the reinforcing core only extends over one of the two limbs of the pipe and that the end of the core is located approximately in correspondence with the part in which the straight limb starts to curve.
- a second core 6' ( Figure 4) which is introduced into the limb approximately as far as the point at which the limb joins the curved connecting portion 2c is disposed in the limb which does not have the reinforcing core.
- a relative rotation of 90° of each of the two limbs 2a, 2b relative to the curved connecting portion 2c is caused about an axis which coincides with or, generally, is parallel to the longitudinal axis of the straight limbs 2a, 2b.
- This relative rotation is performed by immobilising the connecting portion 2c and holding the straight limbs 2a, 2b from the exterior with gripper members which impart the necessary rotation.
- the pipe assumes the shape shown in Figure 4, with the longer axes 4 of the straight limbs 2a, 2b aligned relative to one another or, in general, parallel to one another.
- the reinforcing cores 6, 6' are then withdrawn and a plurality of fins which are secured to the pipes by expansion of the pipes, according to a known technology, are then fitted on the straight limbs 2a, 2b of a series of parallel pipes.
- the object of the flexible reinforcing core is to prevent the pipe from yielding.
- the same result can be obtained by introducing a material which melts at a temperature far lower than the melting temperature of the material forming the pipe into the pipe. This material is introduced into the pipe in the liquid state and is solidified before the bending process is performed. At the end of the bending operations, this material is removed again in the liquid state by heating the pipe.
- Figure 1 shows schematically a heat exchanger with pipes having an oblong section and bent according to the process described above.
- the flow of air strikes the heat exchanger in the direction indicated by the arrows A in Figure 1 and the pipes are located with their longer axis parallel to the direction of the air flow in a manner similar to that which occurs in heat exchangers having two collector tanks situated at the opposite ends of the stack of sheets.
- the fact that the longer axes 4 of the pipes are aligned with or parallel to one another enables a liquid inlet zone and a return zone to be provided in the collector tank by means of a simple longitudinal separating plate schematically indicated 10 in Figure 6.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO930968A IT1272091B (it) | 1993-12-20 | 1993-12-20 | Procedimento per la piegatura di un tubo a sezione trasversale oblunga e scambiatore di calore con tubi a sezione oblunga piegati a u |
ITTO930968 | 1993-12-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0659500A1 true EP0659500A1 (de) | 1995-06-28 |
EP0659500B1 EP0659500B1 (de) | 1998-01-14 |
Family
ID=11411950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94117924A Expired - Lifetime EP0659500B1 (de) | 1993-12-20 | 1994-11-14 | Verfahren zum Biegen eines Rohrs mit länglichem Querschnitt und Wärmetauscher mit Rohren mit länglichem Querschnitt und gebogen in U-Form |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0659500B1 (de) |
DE (1) | DE69407940T2 (de) |
ES (1) | ES2113038T3 (de) |
IT (1) | IT1272091B (de) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19649129A1 (de) * | 1996-11-27 | 1998-05-28 | Behr Gmbh & Co | Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt |
DE19830863A1 (de) * | 1998-07-10 | 2000-01-13 | Behr Gmbh & Co | Flachrohr mit Querversatz-Umkehrbogenabschnitt und damit aufgebauter Wärmeübertrager |
EP1189038A1 (de) * | 2000-09-14 | 2002-03-20 | Endress + Hauser Flowtec AG | Verfahren zum Biegen von Messrohren |
US6591656B1 (en) | 2000-09-14 | 2003-07-15 | Endress + Hauser Flowtec Ag | Process for bending measuring tubes |
EP1413844A2 (de) | 2002-10-25 | 2004-04-28 | Bayer Aktiengesellschaft | Temperierkanäle |
DE10306848A1 (de) * | 2003-02-18 | 2004-08-26 | Behr Gmbh & Co. Kg | Flachrohr mit Umkehrbogenabschnitt und damit aufgebauter Wärmeübertrager |
EP1486749A2 (de) | 2003-06-12 | 2004-12-15 | Bayer Industry Services GmbH & Co. OHG | Turbulenzerzeuger |
CN101532786B (zh) * | 2008-03-11 | 2012-07-18 | 昭和电工株式会社 | 热交换器 |
CN109990627A (zh) * | 2017-12-29 | 2019-07-09 | 浙江盾安机械有限公司 | 一种多层蛇形扁管换热器及其加工工艺 |
CN113454409A (zh) * | 2019-02-21 | 2021-09-28 | Bsh家用电器有限公司 | 用于制冷器具的蒸发器和制冷器具 |
CN113732198A (zh) * | 2020-05-31 | 2021-12-03 | 杭州三花微通道换热器有限公司 | 换热器及其加工方法 |
EP4317899A1 (de) * | 2022-08-04 | 2024-02-07 | Valeo Systemes Thermiques | Röhre für einen wärmetauscher |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1108189A (fr) * | 1953-11-04 | 1956-01-10 | Western Electric Co | Mandrin pour exécuter des torsions dans des pièces tubulaires à section noncirculaire |
FR2222623A1 (en) * | 1973-03-22 | 1974-10-18 | Chausson Usines Sa | Multi-tube motor vehicle radiator - has vert. U-shaped tubes joining separate sections of single water box |
FR2321345A1 (fr) * | 1975-08-19 | 1977-03-18 | Serinox | Procede de cintrage a froid de profiles tubulaires |
FR2547751A1 (fr) * | 1983-06-22 | 1984-12-28 | Snecma | Methode de cintrage d'un tube metallique |
US4625378A (en) * | 1983-05-09 | 1986-12-02 | Matsushita Refrigeration Company | Method of manufacturing fin-tube heat exchangers |
-
1993
- 1993-12-20 IT ITTO930968A patent/IT1272091B/it active IP Right Grant
-
1994
- 1994-11-14 DE DE69407940T patent/DE69407940T2/de not_active Expired - Fee Related
- 1994-11-14 ES ES94117924T patent/ES2113038T3/es not_active Expired - Lifetime
- 1994-11-14 EP EP94117924A patent/EP0659500B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1108189A (fr) * | 1953-11-04 | 1956-01-10 | Western Electric Co | Mandrin pour exécuter des torsions dans des pièces tubulaires à section noncirculaire |
FR2222623A1 (en) * | 1973-03-22 | 1974-10-18 | Chausson Usines Sa | Multi-tube motor vehicle radiator - has vert. U-shaped tubes joining separate sections of single water box |
FR2321345A1 (fr) * | 1975-08-19 | 1977-03-18 | Serinox | Procede de cintrage a froid de profiles tubulaires |
US4625378A (en) * | 1983-05-09 | 1986-12-02 | Matsushita Refrigeration Company | Method of manufacturing fin-tube heat exchangers |
FR2547751A1 (fr) * | 1983-06-22 | 1984-12-28 | Snecma | Methode de cintrage d'un tube metallique |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19649129A1 (de) * | 1996-11-27 | 1998-05-28 | Behr Gmbh & Co | Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt |
EP0845647A1 (de) | 1996-11-27 | 1998-06-03 | Behr GmbH & Co. | Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt |
DE19830863A1 (de) * | 1998-07-10 | 2000-01-13 | Behr Gmbh & Co | Flachrohr mit Querversatz-Umkehrbogenabschnitt und damit aufgebauter Wärmeübertrager |
WO2000003190A1 (de) | 1998-07-10 | 2000-01-20 | Ford-Werke Aktiengesellschaft | Flachrohr mit querversatz-umkehrbogenabschnitt und damit aufgebauter wärmeübertrager |
US6546999B1 (en) | 1998-07-10 | 2003-04-15 | Visteon Global Technologies, Inc. | Flat tubes for heat exchanger |
EP1189038A1 (de) * | 2000-09-14 | 2002-03-20 | Endress + Hauser Flowtec AG | Verfahren zum Biegen von Messrohren |
US6591656B1 (en) | 2000-09-14 | 2003-07-15 | Endress + Hauser Flowtec Ag | Process for bending measuring tubes |
EP1413844A2 (de) | 2002-10-25 | 2004-04-28 | Bayer Aktiengesellschaft | Temperierkanäle |
DE10306848A1 (de) * | 2003-02-18 | 2004-08-26 | Behr Gmbh & Co. Kg | Flachrohr mit Umkehrbogenabschnitt und damit aufgebauter Wärmeübertrager |
WO2004074756A2 (de) | 2003-02-18 | 2004-09-02 | Behr Gmbh & Co. Kg | Flachrohr mit umkehrbogenabschnitt und damit aufgebauter wärmeübertrager |
EP1486749A2 (de) | 2003-06-12 | 2004-12-15 | Bayer Industry Services GmbH & Co. OHG | Turbulenzerzeuger |
DE10326381B4 (de) * | 2003-06-12 | 2005-09-22 | Jähn, Peter | Turbulenzerzeuger |
CN101532786B (zh) * | 2008-03-11 | 2012-07-18 | 昭和电工株式会社 | 热交换器 |
CN109990627A (zh) * | 2017-12-29 | 2019-07-09 | 浙江盾安机械有限公司 | 一种多层蛇形扁管换热器及其加工工艺 |
CN113454409A (zh) * | 2019-02-21 | 2021-09-28 | Bsh家用电器有限公司 | 用于制冷器具的蒸发器和制冷器具 |
CN113732198A (zh) * | 2020-05-31 | 2021-12-03 | 杭州三花微通道换热器有限公司 | 换热器及其加工方法 |
EP4317899A1 (de) * | 2022-08-04 | 2024-02-07 | Valeo Systemes Thermiques | Röhre für einen wärmetauscher |
WO2024028070A1 (en) * | 2022-08-04 | 2024-02-08 | Valeo Systemes Thermiques | A tube for heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
ES2113038T3 (es) | 1998-04-16 |
ITTO930968A0 (it) | 1993-12-20 |
ITTO930968A1 (it) | 1995-06-20 |
EP0659500B1 (de) | 1998-01-14 |
DE69407940T2 (de) | 1998-04-23 |
DE69407940D1 (de) | 1998-02-19 |
IT1272091B (it) | 1997-06-11 |
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