EP2618093A2 - Échangeur de chaleur, plaque d'échangeur de chaleur et procédé de fabrication d'un échangeur de chaleur - Google Patents

Échangeur de chaleur, plaque d'échangeur de chaleur et procédé de fabrication d'un échangeur de chaleur Download PDF

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Publication number
EP2618093A2
EP2618093A2 EP20130000073 EP13000073A EP2618093A2 EP 2618093 A2 EP2618093 A2 EP 2618093A2 EP 20130000073 EP20130000073 EP 20130000073 EP 13000073 A EP13000073 A EP 13000073A EP 2618093 A2 EP2618093 A2 EP 2618093A2
Authority
EP
European Patent Office
Prior art keywords
flange
heat exchanger
plate
opening
endplate
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.)
Withdrawn
Application number
EP20130000073
Other languages
German (de)
English (en)
Other versions
EP2618093A3 (fr
Inventor
Lars Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of EP2618093A2 publication Critical patent/EP2618093A2/fr
Publication of EP2618093A3 publication Critical patent/EP2618093A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples

Definitions

  • the invention relates to a heat exchanger comprising a stack of a plurality of pairs of heat exchanger plates formed of sheet metal having a three-dimensional structured pattern, a first flow path being defined within said pairs and a second flow path being defined between said pairs, each plate having at least one through-opening, an outermost plate being an endplate.
  • the invention relates to a heat exchanger plate formed of sheet metal having a three-dimensional structured pattern and having at least one through-opening.
  • the invention relates as well to a method for producing a heat exchanger forming a stack of pairs of heat exchanger plates formed of sheet metal having a three-dimensional structured pattern, each plate having at least one through-opening, an outermost plate being an endplate.
  • a heat exchanger of the kind mentioned above is known from US 2007/0261829 A1 .
  • the heat exchanger plates of this heat exchanger have a three-dimensional structured pattern comprising bulges and hollows.
  • the bulges and hollows are placed against respective hollows and bulges of an adjacent heat exchanger plate to form the flow path on the primary and on the secondary side of the heat exchanger.
  • Another known pattern is a herringbone pattern.
  • a heat exchanger usually requires four ports, i.e. two pairs of ports. One pair of ports is necessary for the primary side, i.e. a supply port and a return port. The other pair of ports is necessary for the secondary side, i.e. for supplying and returning the fluid which should be heated or cooled with the help of the heat exchanger.
  • the ports have to be connected with external fluid lines.
  • the ports are usually arranged in line with the respective through-openings.
  • special top and bottom plates are necessary making the heat exchanger expensive to manufacture. In the following then top and bottom plates are briefly referred to as "endplates".
  • the task underlying the invention is to facilitate the connection of the heat exchanger to external fluid lines.
  • This task is solved in said the through-opening of said endplate comprises a raised edge forming a flange.
  • This flange can be used for the connection with the external fluid line.
  • the flange forms a cylinder or a short tube making it easy to fix a fluid line directly or to fix a tap where the tap may comprise the connection means needed like a threading or the like.
  • the flange is an integral part of the heat exchanger plate. It is formed of the material pressed out of the area in which the through-opening is arranged. Up to now the through-opening has been formed by stamping or cutting out the through-opening. The cut out material has been wasted. Now the material is kept integral with the heat exchanger plate and it is used to form the flange.
  • the through-opening and the raised edge forming the flange can be made in the same press or die in which the bulges and hollows are produced, i.e. simply by pressing a plate of sheet material into the desired shape.
  • said flange is directed outwardly from the stack.
  • At least a neighbouring plate to said endplate comprises at least one through-opening having a raised edge forming a flange, said flange being inserted into the flange of said endplate.
  • This second flange i.e. the flange of the plate next to the endplate makes the port even more stable since it bears against the inside of the flange of the endplate at least over a part of its length.
  • said flanges of said plates are connected to each other.
  • the connection between the flanges can be made by welding or brazing. Such a connection makes the port more stable.
  • a transition zone between such flange and the plane of the plate is rounded and the flange of a plate contacts a flange of a neighbouring plate beyond the transition zone.
  • the transition zone is rounded the stress in the plate is minimized.
  • a contact between the flanges of two neighbouring or adjacent plates is made out of the rounded transition zone it is clear that a contact between the flanges takes place in a region in which both flanges have a cylinder or slightly conical form. Such a contact zone facilitates the connection between the two flanges.
  • the through-opening of all plates are provided with a raised edge forming a flange, each of the flanges being connected to a flange of a neighbouring plate.
  • a fluid with an elevated pressure tries to "blow up" the space between two heat exchanger plates. This is prevented by the connection between the flanges of two neighbouring or adjacent plates. The pressure produces a tensile stress in the flange bridging the space between the two adjacent plates.
  • the flange is made of sheet metal it can withstand these tensile stresses so that a blow up of the heat exchanger is prevented.
  • the task is solved with a heat exchanger plate of the kind mentioned above in that said through-opening has a raised edge forming a flange.
  • the flange is an integral part of the heat exchanger plate. It can be formed in the same die or press as the pattern. The material in the area of the through-opening is no longer removed but pressed into the form of the flange.
  • This flange can be used for several purposes. One purpose is to provide a part of a connection port when the flange is part of an endplate, i.e. of a top plate or a bottom plate of the stack of heat exchanger plates. Another purpose is the connection of neighbouring or adjacent heat exchanger plates.
  • a transition zone between the plane of the plate and the flange is rounded.
  • Such a rounded transition zone minimizes stresses in the sheet metal so that the risk of damage is minimized.
  • the task is solved by a method for producing a heat exchanger as mentioned above in that said through-opening of said endplate is formed with a raised edge by pressing the sheet metal of the area of the through-opening into a flange forming said raised edge.
  • the flange of the endplate can be used to fix directly or indirectly an external fluid line so that a top or bottom plate can be made simpler in construction.
  • the endplate is fixed to the stack with the flange being directed outwardly.
  • a part of a connection port is produced forming a short tube or cylinder protruding outwardly so that it is easy to fix a tap or a fluid line directly.
  • a neighbouring plate to the endplate is formed with a flange surrounding the through-opening and this flange is inserted into the flange of the endplate. This makes the connecting port more stable.
  • the flange of the endplate and the flange of its neighbouring plates are connected.
  • the two flanges can, for example, be welded or brazed. Such a connection makes the port even more stable.
  • Fig. 1 shows a heat exchanger plate 1a as it is shown in US 2007/0261829 A1 .
  • This plate 1a comprises bulges 2 which are raised by a given height over the plane of the heat exchanger plate 1a.
  • the heat exchanger plate 1a comprises hollows 3 which are sunk to a given depth in this heat exchanger plate 1a.
  • the bulges 2 are symbolized by white circles while the hollows 3 are symbolized by circles with a cross.
  • two such heat exchanger plates 1a form a pair of plates in which one heat exchanger plate 1a is rotated by 180° about its longer edge 4. A plurality of such pairs is stacked one above the other.
  • a first flow path is formed within the pairs and a second flow path is formed between these pairs.
  • Adjacent or neighbouring heat exchanger plates 1a are connected such that the bulges 2 of a lower heat exchanger plate are welded to the bulges of the reversed (rotated by 180° about the longer edge 4) upper heat exchanger plates.
  • the hollows 3 of the lower heat exchanger plate are welded to the hollows 3 of a reversed (rotated about its longer edge 4 by 180°) heat exchanger plate.
  • Such hollows 3 form bulges 2 of the reversed heat exchanger plate.
  • Fig. 2 In this figure (the same is true for all other figures) the number of plates and the sizes of hollows and bulges are not representative for a real system. To simplify the further description, the bulges 2 and the hollows 3 are commonly termed as "dimples”.
  • Heat exchanger plates are stacked in a manner, where the dimple bottoms 15 of an upper plate are aligned to dimple tops 14 of a lower plate, and here the plates are welded together by means of weldings 16, thus forming strong connections due to the dense distribution of dimples throughout the heat exchanger.
  • the heat exchanger plate 1a comprises four through-openings 5-8. These through-openings 5-8 are used to form channels or connections through which the fluids are supplied and returned to the respective spaces within the pairs of heat exchanger plates or between the pairs of heat exchanger pairs.
  • the through-openings 5, 7 forms a supply and a return for the first flow path
  • the through-openings 6, 8 form a supply and a return for the second fluid path.
  • the heat exchanger plate 1 is formed of a sheet metal.
  • a sheet metal is a material having a good thermal conductivity.
  • the material can be shaped by means of a press or die. Such a material will in most cases be in fact a metal. However, other materials having the abilities can be used as well, like some plastic materials.
  • the bulges 2 and the hollows 3 form a three-dimensional structured profile or pattern.
  • This pattern is produced in a press or die.
  • Other patterns can be used as well, e.g. a herringbone pattern.
  • a rim portion forms an identical level to one of the top dimples 14 or bottom dimples 15, i.e. to the bulges 2 and hollows 3.
  • every second connections are "opening" dimple 13 to "opening” dimple 13, forming fluid connection to the spaces in between the respective two plates, and every other second connections are directly rim portion 17 to rim portion 17, excluding fluid connection to the spaces in between the respective two plates. In this manner two separate sealed flow systems are created.
  • a top plate 1a and a bottom plate 1e are provided, i.e. a top plate 1a and a bottom plate 1e.
  • These endplates 1a, 1e are substantially thicker and of more rigid material to protect the heat exchanger plates as it is well known in the art.
  • Fig. 2 illustrates the two flow paths, i.e. the primary path P and the secondary path S. As can be seen the two flow paths are separated. Fig. 2 illustrates an opening 6 having excess only to the primary flow path P and an opening 8 having excess only to the secondary flow path S.
  • the through-openings 5-8 have to be connected to respective lines supplying and returning fluids to the primary and secondary flow paths.
  • Fig. 3 and 4 illustrate a first aspect of the present invention, where, rather than just forming a through-opening in the respective top plate 1a (or bottom plate 1e) the through-opening 5 is formed with a raised edge 9 forming a flange 10.
  • the flange 10 is made integral with the rest of the top plate 1a.
  • the flange 10 is made of the material which has been pressed out of the heat exchanger plate 1a to form the through-opening 5. When the through-opening 5 is formed no material is wasted.
  • Taps 13 may be fixed to the flanges 10 in any manner known in the art, where the taps 13 may comprise the needed connection means like windings etc.
  • the flanges 10 thus form a stable platform for the attachment of the tab 13 of the top plate 1a.
  • a cost efficient heat exchanger may be formed, where the tabs 13 or other connection means can be welded to the heat exchanger after brazing, addressing customer demands.
  • Fig. 5 illustrates an alternative solution, where the tab 13 is positioned inside the flange 10.
  • heat exchanger plates, 1b, 1c, 1d... are formed with bended edges 23 overlapping and welded together, thus internal flow systems are sealed from the external flow systems.
  • cavities 22 exist in the area of the opening 8 inside the heat exchanger forming weak points with no support, resulting in a "bulging" heat exchanger seen in Fig. 6 .
  • the plates 1b, 1c, 1d... are well welded, but the top plate 1a (the same is true for the bottom plate 1e) as mentioned previously have been found not easily to form fluid tight weldings to the heat exchanger plates.
  • a solution to overcome this problem is shown in Fig. 7 .
  • Fig. 7 shows a situation in which a top plate 1a and a plurality of heat exchanger plates 1b, 1c, 1d are stacked one above the other.
  • the top plate 1a and each plate 1b, 1c, 1d is provided with a flange 10, 11, 12.
  • the flange 10 of the top plate 1a is directed outwardly, i.e. it extends almost perpendicular to the plane of the outermost heat exchanger plate 1a.
  • the flange 11 of the heat exchanger plate 1b next to the top plate 1a is inserted into the flange 10 of top plate 1a. Furthermore, the flange 11 is connected to the flange 10. Such a connection can be established by welding, brazing or the like. Furthermore, a corresponding flange 12 of the heat exchanger plate 1c next to the second heat exchanger plate 1b is inserted into the flange 11 of the second heat exchanger plate 1b and connected to the flange 11.
  • the three flanges 10, 11, 12 form a kind of cylinder or tube which is rather stable. This solves the problem of the "bulging" heat exchanger plates 1a, 1b, 1c etc., as illustrated in Fig.
  • this cylinder or tube forms a supporting 'pillar' extending through the heat exchanger. Openings would naturally have to be formed in all those of the flanges 12 where fluidic access from the openings 5, 6, 7, 8 are to be formed to the flow channels between plates 1c and 1d etc.
  • Fig. 8 illustrates one example of how such openings may be formed quite naturally in these flanges 12 by cutting tongues 30 in the area of the openings 5-8, e.g. prior to forming the flanges. Then, when overlapping these tongues 30, forming the flanges 12, in the manner as also illustrated in Fig. 7 , such openings naturally will occur.
  • the tongues 30 are formed by cutting in a direction with a vector having a component in the radial direction towards the centre of the respective opening 5-8 being different from zero.
  • the angular component of the vector this being tangential to the circumference of the opening, may be zero or different from zero.
  • connection between the flanges 10, 11, 12 has the additional advantage that the heat exchanger plates 1a, 1b, 1c are connected not only in the region of the bulges 2 and hollows 3, but also in the region of the through-opening 5 (the same connection can of course be provided in the region of the other through-openings 6-8).
  • the flange 10 could optionally be provided with a 'edge' 32 reaching over the end of the flange 11.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20130000073 2012-01-23 2013-01-09 Échangeur de chaleur, plaque d'échangeur de chaleur et procédé de fabrication d'un échangeur de chaleur Withdrawn EP2618093A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA201200064 2012-01-23

Publications (2)

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EP2618093A2 true EP2618093A2 (fr) 2013-07-24
EP2618093A3 EP2618093A3 (fr) 2015-03-18

Family

ID=47665852

Family Applications (1)

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EP20130000073 Withdrawn EP2618093A3 (fr) 2012-01-23 2013-01-09 Échangeur de chaleur, plaque d'échangeur de chaleur et procédé de fabrication d'un échangeur de chaleur

Country Status (3)

Country Link
EP (1) EP2618093A3 (fr)
CN (1) CN103225973B (fr)
RU (1) RU2529957C1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19805439A1 (de) * 1998-02-11 1999-08-12 Behr Gmbh & Co Verfahren zur Herstellung eines Stapelscheibenwärmeübertragers und dadurch hergestellter Wärmeübertrager
US20110308779A1 (en) * 2008-12-17 2011-12-22 Swep International Ab Port opening of heat exchanger

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1313973A (en) * 1971-05-07 1973-04-18 Hutogepgyar Tubular heat exchanger and a method for the production thereof
SU1740946A1 (ru) * 1989-05-11 1992-06-15 Специальное Конструкторско-Технологическое Бюро По Автоматизации, Микропроцессорной И Турбохолодильной Техники Пластинчато-трубный теплообменник
JPH06265289A (ja) * 1993-03-11 1994-09-20 Hitachi Ltd プレート式熱交換器
DE19611447C1 (de) * 1996-03-22 1997-07-10 Laengerer & Reich Gmbh & Co Gehäuseloser Plattenwärmetauscher
DE19722074A1 (de) * 1997-05-27 1998-12-03 Knecht Filterwerke Gmbh Plattenwärmetauscher, insbesondere Öl/Kühlmittel-Kühler für Kraftfahrzeuge
RU2137076C1 (ru) * 1997-09-19 1999-09-10 Общество с ограниченной ответственностью "Контэкс" Пластинчато-трубный теплообменник
US7422054B2 (en) * 1999-07-16 2008-09-09 Dierbeck Robert F Heat exchanger assembly for a charge air cooler
SE518475C2 (sv) * 2001-02-20 2002-10-15 Alfa Laval Ab Plattvärmeväxlare med sensoranordning
RU2199067C1 (ru) * 2001-06-08 2003-02-20 Антониади Валерий Георгиевич Трубчато-пластинчатый теплообменник и способ его изготовления
RU29368U1 (ru) * 2002-12-30 2003-05-10 Либкинд Борис Наумович Пластинчатый теплообменник
SE528629C2 (sv) * 2004-09-08 2007-01-09 Ep Technology Ab Rillmönster för värmeväxlare
CA2485036C (fr) * 2004-10-19 2012-04-24 Dana Canada Corporation Echangeur de chaleur a plaques
RU2272979C1 (ru) * 2004-12-22 2006-03-27 Борис Наумович Либкинд Пластинчатый теплообменник
RU2366879C1 (ru) * 2008-05-15 2009-09-10 Общество С Ограниченной Ответственностью "Нббк" Пластинчатый теплообменник
RU76433U1 (ru) * 2008-05-15 2008-09-20 Общество С Ограниченной Ответственностью "Нббк" Пластинчатый теплообменник
SE0802203L (sv) * 2008-10-16 2010-03-02 Alfa Laval Corp Ab Hårdlödd värmeväxlare och metod att tillverka hårdlödd värmeväxlare

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19805439A1 (de) * 1998-02-11 1999-08-12 Behr Gmbh & Co Verfahren zur Herstellung eines Stapelscheibenwärmeübertragers und dadurch hergestellter Wärmeübertrager
US20110308779A1 (en) * 2008-12-17 2011-12-22 Swep International Ab Port opening of heat exchanger

Also Published As

Publication number Publication date
EP2618093A3 (fr) 2015-03-18
RU2013102010A (ru) 2014-08-20
CN103225973A (zh) 2013-07-31
CN103225973B (zh) 2015-10-21
RU2529957C1 (ru) 2014-10-10

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