EP1462751A1 - Panneau d'échange thermique et sa méthode de fabrication - Google Patents

Panneau d'échange thermique et sa méthode de fabrication Download PDF

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Publication number
EP1462751A1
EP1462751A1 EP03380071A EP03380071A EP1462751A1 EP 1462751 A1 EP1462751 A1 EP 1462751A1 EP 03380071 A EP03380071 A EP 03380071A EP 03380071 A EP03380071 A EP 03380071A EP 1462751 A1 EP1462751 A1 EP 1462751A1
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EP
European Patent Office
Prior art keywords
joining
plate
joining lengths
lengths
sheets
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Withdrawn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
EP03380071A
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German (de)
English (en)
Inventor
Alex Brustenga Regard
Ignasi LIuis Escolà Jordà
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.)
Soleco SL
Original Assignee
Soleco SL
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 Soleco SL filed Critical Soleco SL
Priority to EP03380071A priority Critical patent/EP1462751A1/fr
Publication of EP1462751A1 publication Critical patent/EP1462751A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F28F3/14—Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation
    • 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

Definitions

  • This invention refers to a heat exchanger plate formed by two metallic sheets attached to each other and tightly joined to each other along all their perimeter, with a plurality of outwardly dished areas formed on both metallic sheets determining channels for fluid flowing from an inlet to an outlet around such joining areas.
  • This invention also refers to a process for producing such heat exchanger plate which means laser welding and pressurized fluid injection.
  • ES-A-8303662 a compact heater which uses at least a flat panel type collector of solar energy which is formed of two rolled steel sheets attached and welded to each other along all their perimeter except at intersections with fluid inlet and outlet nozzles. Between the two sheets and within such perimeter, are systematically located a plurality of welding points. Once welded, the two sheets are permanently deformed by inflating them through the introduction of a pressurized fluid within the assembly, so that the panel adopts an external shape similar to a mattress and gaps are achieved between the two sheets through which water will flow acting as heat exchanging agent.
  • Such construction has the drawback of providing a virtually single gap between the two sheets, only interrupted by the welding points so that the heat exchanging fluid tends to flow in a rather straight way from the inlet to the outlet without completely spreading to contact the whole of the sheets internal surface.
  • Document ES-A-479755 discloses a solar energy absorber comprising two sheets attached and welded by their perimeter. Both sheets comprise repeated regular configurations outwardly shaped and located the facing each other with a given shift between them to form channels between both sheets for a heat exchanging fluid flow between an inlet and an outlet. At the non deformed flat parts of the two sheets in contact, there exists joining areas formed by welding points. Such construction provides a network of channels for the heat exchanging fluid obliging the liquid to spread substantially through all the internal spaces between the two sheets.
  • conformations are obtained by shaping in the sheets before joining them and for this relatively big and expensive equipments are required which make the production process expensive and has an effect on the cost of the product.
  • the shaping equipments use mould and dies which are little flexible when carrying out changes in the configurations and in the moulding of the sheets to different sizes.
  • the Spanish utility model ES-A239429 refers to a plate for absorbing heat radiations which is constituted of two equal sheets arranged contiguous being joined at their peripheral edges, which include a series of cylindrical or frustum shaping which will remain facing each other and with their bottom in contact and joined by welding, within the plate a series or circulating spaces being established which will be occupied by water which can thus flow on every direction.
  • An object of this invention is to provide an heat exchanging plate formed of two metallic sheets attached and tightly welded to each other along all their perimeter with a plurality of outwardly dished areas formed on both metallic sheets determining channels for fluid flowing from an inlet to an outlet around a plurality of joining areas between the two sheets, where the configuration of such channels secures a maximum effectiveness of heat exchange between the sheets and fluid and where such plate can be obtained in a relatively easy and quick way at a low cost.
  • Another object of this invention is to provide a production process for such heat exchanging plate allowing to obtain it in a relatively easy and quick way at low cost and which is sufficiently flexible to accept changes on the configurations and sizes of the sheets to be moulded without a significant added cost.
  • the former of such objects is achieved, according to this invention, providing a heat exchanging plate of the type comprising two metallic sheets attached to each other and tightly joined to each other along all their perimeter, a plurality of joining areas between the two sheets within such perimeter, and a plurality of outwardly dished areas of such metallic sheets determining channels for fluid flowing from an inlet to an outlet around such joining areas.
  • the plate of this invention is characterized in that such joining areas define a plurality of first discrete straight joining lengths grouped aligned in several assemblies according to lines parallel to a first direction and a plurality of second discrete straight joining lengths grouped aligned in several assemblies according to lines parallel to a second direction each of two of such first joining lengths being interposed between contiguous ends of two of such second joining lengths and each of such second joining lengths being interposed between contiguous ends of such first joining lengths.
  • first and second joining lengths are laser welding lines.
  • the tight junction of the perimeter is also preferably obtained by laser welding, although equivalent results could be achieved with other processes, such as wheel welding.
  • the second of above objects is achieved, according to this invention, providing a process for producing one of such heat exchanging plates of the type comprising to attach two metallic sheets and tightly joining them to each other along all their perimeter; then producing a plurality of joining areas between such two metallic sheets on such perimeter; then fastening by several areas distributed along the perimeter the said metallic sheets thus attached and joined; and last, injecting a pressurized fluid between the metallic sheets until achieving a plurality of dished areas by permanent deformation of both metallic sheets determining channels for a fluid flowing from an inlet to an outlet around the said joining areas.
  • the process of this invention is characterized in that it comprises to carry out such joining areas in the form of a plurality of first discrete straight joining lengths grouped in several assemblies aligned according to lines parallel to a first direction and a plurality of second discrete straight joining lengths grouped in several assemblies aligned according to lines parallel to a second direction crosswise such first direction, each of such first joining lengths being interposed between contiguous ends of two of such second joining lengths and each of the second joining lengths interposed between contiguous ends of two of the first joining lengths.
  • the process comprises to carry out the first and second joining lengths by laser welding and preferably by means of a laser welding head mounted on a robotic arm controlled by programmable controlling electronic means.
  • laser welding carried out with a robotic arm provides a great saving of time compared against other processes such as, for example, wheel welding. This is due to the fact that with laser welding it is only required to activate and deactivate the laser ray emitter matched with the displacement of the head at a given distance of one of the sheets of the plate while with wheel welding such displacement has to be matched with the closure, application of pressure and opening of wheel-holder arms on both sheets of the plate.
  • Such tight junction of such perimeter is also preferably obtained by laser welding, although as it is dealt with continuous welding beads close to the edges of the sheet they could also be carried out with wheel with equivalent performances.
  • the laser welding process with an electronically controlled robotic arm provides a great flexibility of design and production because with it is possible to replace the design with another one or the size of the plate with another one by simple selecting the suitable program out of a series of programs previously stored in a memory associated to such controlling electronic means or by introducing a new program with data suitable for the new design.
  • each of the joining lengths in one direction is centred with respect to the line crossing it, according to which joining lengths are aligned in the other direction.
  • the first and second directions are mutually perpendicular, although they could also be oblique to each other, forming a given angle close to the straight angle, for example, comprised from 60° to 90° .
  • first joining lengths are centred with respect to the parallel lines according to which are aligned the second joining lengths and vice versa, because with it dished areas are created determining channels in multiple directions without any of them is a priority for such fluid flow.
  • the two attached sheets are generally quadrangular or rectangular although it is not essential and there exists no special limitations as for the size and proportion thereof.
  • the mentioned fluid inlet and outlet comprise respective openings in one or the other sheet close to the sides opposite to the perimeter of the plate.
  • respective sleeves connecting to a pipe are coupled at such openings.
  • the inlet and outlet could both be indistinctly in a same sheet or each in a different sheet, that is to say on the same or different faces of the plate, it is preferred that both are in a same sheet to facilitate the connections between contiguous plates when several plates are connected to each other.
  • the process of the invention allows to place the said connecting sleeves either on one or both sheets, prior to the step of attaching the sheets to each other and tightly welding the perimeter around them.
  • the said plurality of dished areas around the joining lengths determines channels in multiple directions preferably even, equivalent, for such fluid flow.
  • the joining lengths are longer and at gaps between contiguous ends equivalently shorter at such lines parallel and adjacent to the edges of the plate close to which are arranged the inlet and outlet. This way preferred directions are established from the inlet towards the said corners close to an edge or edges of the plate and from such corners towards the outlet close to another edge or edges of the plate.
  • numeral 10 is designated in general an heat exchanger plate according to an example of embodiment of this invention. No specific figures are included to illustrate the process of this invention, as they are based on well-known techniques. Therefore, the process will be described at same time as plate 20.
  • Plate 20 is composed of two metallic sheets 1,2) (see Fig. 2) attached to each other and tightly joined along all their perimeter 3.
  • the sheets can be of any metallic material which is heat conductor and preferably corrosion resistant, such as for example stainless steel. Only for example purpose, 0.5 mm thick stainless steel sheets AISI 316L are suitable to produce a 1 m long 0.5 m wide plate.
  • Plate 20 includes a plurality of junction areas 8, 9 between such two metallic sheets 1, 2 within such perimeter 3.
  • Plate 20 in addition includes an inlet 6 and an outlet 7 comprising respective openings in one or the other sheets 1, 2, close to opposite edges of plate 20 and respective inlet and outlet 6, 7 connecting sleeves coupled on such openings.
  • plate 20 is arranged so that it shows one of the sheets 1.
  • Such inlet and outlet openings with their respective inlet and outlet 6, 7 connection sleeves are both arranged on such same sheet 1.
  • the inlet opening and the respective inlet 6 connection sleeve are arranged on one of the sheets 1, 2 and such outlet opening and respective outlet 7 connection sleeve are arranged on the other of the sheets 1,2.
  • the process of the invention comprises, first , attaching the two metallic sheets 1, 2 and tightly joining them to each other along the said perimeter 3 by welding which can easily be carried out with a continuous line of wheel welding.
  • the welding line along the perimeter 3 of the sheets can also be carried out with laser welding in a same operation.
  • Carrying out such laser welding if preferably with a laser welding head mounted on a robotic arm controlled by programmable controlling electronic means.
  • carrying out the inlet and outlet openings and coupling the respective inlet and outlet 6, 7 connection sleeves on such openings is carried out prior to the step of attaching the sheets 1, 2 and welding the tight perimeter 3 around them. As the inlet and outlet 6,7 connection sleeves are not going to be dismounted, their coupling on the respective openings is made by welding.
  • plate 20 shows a plurality of outwardly dished areas 5 of the two metallic sheets 1, 2 (Fig. 2) determining channels for the fluid flowing from the inlet 6 to the outlet 7, around such joining ares 8, 9. Thanks to such channels 5, the plate 20 is useful, for example, as an element absorbing the heat in an heliothermal captor or as heat absorber or disengaging device in other applications of heat transfer using an heat exchanger fluid flow within the channels 5.
  • the process for obtaining such dished areas 5 is carried out by means of a well-known technique once the sheets 1, 2 are tightly joined along the perimeter 3 and the joining lengths 8,9 have been made.
  • Such technique consisting in fastening at least by several areas distributed along the perimeter 3 the said metallic sheets 1, 2 attached and joined and injecting a pressured fluid between both metallic sheets 1, 2 through, for example, one of such inlet or outlet 6, 7.
  • a pressured fluid between both metallic sheets 1, 2 through, for example, one of such inlet or outlet 6, 7.
  • the joining areas 8, 9 define a plurality of first discrete straight joining lengths 8, grouped aligned according to lines parallel to a first direction and a plurality of second discrete straight joining lengths 9 grouped aligned according to lines parallel to a second direction.
  • first joining lengths 8 being interposed between contiguous ends 9a, 9b of two of such second joining lengths 9 while each of the second joining lengths 9 are interposed between contiguous ends 8a, 8b, of two of the first joining lengths 8, as shown with more details in Fig. 3.
  • the first joining lengths 8 have substantially same span to those of the second joining lengths 9 and the gaps between contiguous ends of the first joining lengths 8 are substantially the same as the gaps between contiguous end of the second joining lengths 9.
  • the first joining lengths 8 are centred with respect to the lines parallel according to which are aligned the second joining lengths 9 and the second joining lengths 9 are centred with respect of the parallel lines according to which are aligned the first joining lengths 8, so that such plurality of dished areas 5 determines channels in multiple directions preferably even equivalent to the flow of such fluid.
  • the first joining lengths 8 have substantially same span as the gaps between their contiguous ends and the spans of the second joining lengths 9 are substantially the same as the gaps between their contiguous ends. It is also profitable that such parallel lines along which are aligned the first joining lengths 8 are equidistant to each other and that also the parallel lines along which are aligned the second joining lengths 9 are equidistant and that the gaps separating the parallel lines in one or the other direction are the same. It is sought to achieve a network of channels having branches in multiple directions as symmetrically and evenly as possible in order that a fluid flowing through them tends to be subdivided into equal parts at each branching-off and spreads through the plate. Although it is not essential, it is preferred that the first and the second directions are perpendicular to each other as in the example of embodiment illustrated in Fig. 1.
  • Fig. 3 diagrammatically shows with arrows the possible directions of a fluid flowing through the channels formed by the dished areas 5 on a plate as that of Fig. 1 in which the inlet 6 is at a left lower end and the outlet 7 at a right top end.
  • the flow tends to go parallel to the first joining lengths 8 at both ends thereof and to split into two substantially symmetric branches when reaching the lower part of the second joining lengths 9 to direct themselves towards the ends 9a, 9b.
  • part of the fluid of each of such branches will be split when reaching another first joining length 8 and part of it will be mixed with part of the fluid from other branches at the top part of other contiguous joining lengths 9 to pass between one or the other side of the joining length 8 and the ends 9a, 9b of such joining lengths 9 and so on.
  • joining lengths, designated as 10 and 11 aligned along lines parallel to the first and second directions and adjacent to such edges of the plate close to such inlet 6 and/or outlet 7 are longer and the gaps between contiguous ends equivalently shorter than the first and second joining lengths 8, 9 and gaps between contiguous ends of the rest of the plate.
  • the plate incorporate the said third joining lengths close to the long edges parallel to the first direction, preferably matched with the fourth joining lengths.
  • Other small joining lengths 12 can be present close to the edges of the perimeter 3 of the plate 20.

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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)
EP03380071A 2003-03-25 2003-03-25 Panneau d'échange thermique et sa méthode de fabrication Withdrawn EP1462751A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03380071A EP1462751A1 (fr) 2003-03-25 2003-03-25 Panneau d'échange thermique et sa méthode de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03380071A EP1462751A1 (fr) 2003-03-25 2003-03-25 Panneau d'échange thermique et sa méthode de fabrication

Publications (1)

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EP1462751A1 true EP1462751A1 (fr) 2004-09-29

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EP03380071A Withdrawn EP1462751A1 (fr) 2003-03-25 2003-03-25 Panneau d'échange thermique et sa méthode de fabrication

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009068245A1 (fr) * 2007-11-27 2009-06-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Élément répartiteur de fluide pour un dispositif de conduite de fluide, en particulier pour des appareils de conduite de fluide multicanaux imbriqués
WO2015057091A1 (fr) * 2013-10-18 2015-04-23 Iq-Energy S.A. Panneau thermique autoportant
JP2020133480A (ja) * 2019-02-19 2020-08-31 株式会社Ｓｕｂａｒｕ 冷却装置
CN114734212A (zh) * 2022-05-18 2022-07-12 东莞新凯隆热能科技有限公司 一种高导热吹胀板及其制造工艺

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES239429A1 (es) 1957-12-28 1958-06-16 Waldes Y Compania S A Mejoras en la fabricaciën de pequenas piezas estampadas en metales anodizados
US3512239A (en) * 1967-04-19 1970-05-19 Rosenblad Corp Method of forming dimpled plate heat exchanger elements by the use of hydrostatic pressure
ES479455A1 (es) 1979-04-09 1980-02-01 Complisa Sa Procedimiento de obtencion en continuo de superficies con alto brillo sobre papeles y telas.
ES8303662A1 (es) 1982-02-09 1983-02-01 Puertolas Pesquer Ramon Calefactor compacto con deposito de agua caliente, que utiliza energia solar, y cuyo funcionamiento es totalmente automatico.
US4407359A (en) * 1980-07-25 1983-10-04 Commissariat A L'energie Atomique Plate heat exchanger
US4471759A (en) * 1981-04-28 1984-09-18 B. Shawn Buckley Method of forming a solar collector or hot water storage tank and solar water heating apparatus using same
US4700445A (en) * 1982-07-12 1987-10-20 Rubin Raskin Method of manufacturing heat transfer panels by inflation
DE4426097A1 (de) * 1994-07-22 1996-01-25 Kloeckner Stahl Gmbh Verfahren zur Herstellung von Hohlkörperstrukturen aus Blechen
JP2000205783A (ja) * 1999-01-19 2000-07-28 Calsonic Kansei Corp 熱交換器用偏平チュ―ブ
JP2001021274A (ja) * 1999-07-08 2001-01-26 Hitachi Ltd プレ−ト式製氷熱交換器

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES239429A1 (es) 1957-12-28 1958-06-16 Waldes Y Compania S A Mejoras en la fabricaciën de pequenas piezas estampadas en metales anodizados
US3512239A (en) * 1967-04-19 1970-05-19 Rosenblad Corp Method of forming dimpled plate heat exchanger elements by the use of hydrostatic pressure
ES479455A1 (es) 1979-04-09 1980-02-01 Complisa Sa Procedimiento de obtencion en continuo de superficies con alto brillo sobre papeles y telas.
US4407359A (en) * 1980-07-25 1983-10-04 Commissariat A L'energie Atomique Plate heat exchanger
US4471759A (en) * 1981-04-28 1984-09-18 B. Shawn Buckley Method of forming a solar collector or hot water storage tank and solar water heating apparatus using same
ES8303662A1 (es) 1982-02-09 1983-02-01 Puertolas Pesquer Ramon Calefactor compacto con deposito de agua caliente, que utiliza energia solar, y cuyo funcionamiento es totalmente automatico.
US4700445A (en) * 1982-07-12 1987-10-20 Rubin Raskin Method of manufacturing heat transfer panels by inflation
DE4426097A1 (de) * 1994-07-22 1996-01-25 Kloeckner Stahl Gmbh Verfahren zur Herstellung von Hohlkörperstrukturen aus Blechen
JP2000205783A (ja) * 1999-01-19 2000-07-28 Calsonic Kansei Corp 熱交換器用偏平チュ―ブ
JP2001021274A (ja) * 1999-07-08 2001-01-26 Hitachi Ltd プレ−ト式製氷熱交換器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 10 17 November 2000 (2000-11-17) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 16 8 May 2001 (2001-05-08) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009068245A1 (fr) * 2007-11-27 2009-06-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Élément répartiteur de fluide pour un dispositif de conduite de fluide, en particulier pour des appareils de conduite de fluide multicanaux imbriqués
WO2015057091A1 (fr) * 2013-10-18 2015-04-23 Iq-Energy S.A. Panneau thermique autoportant
JP2020133480A (ja) * 2019-02-19 2020-08-31 株式会社Ｓｕｂａｒｕ 冷却装置
US11905910B2 (en) * 2019-02-19 2024-02-20 Subaru Corporation Cooling apparatus
CN114734212A (zh) * 2022-05-18 2022-07-12 东莞新凯隆热能科技有限公司 一种高导热吹胀板及其制造工艺

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