EP0290655A1 - Plattenförmiger Wärmetauscher - Google Patents

Plattenförmiger Wärmetauscher Download PDF

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Publication number
EP0290655A1
EP0290655A1 EP87106997A EP87106997A EP0290655A1 EP 0290655 A1 EP0290655 A1 EP 0290655A1 EP 87106997 A EP87106997 A EP 87106997A EP 87106997 A EP87106997 A EP 87106997A EP 0290655 A1 EP0290655 A1 EP 0290655A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plate
manifolds
flow channels
end wall
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Withdrawn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
EP87106997A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ag Co Rehau
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.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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 Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP0290655A1 publication Critical patent/EP0290655A1/de
Withdrawn legal-status Critical Current

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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
    • F28F9/02—Header boxes; End plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/0297—Side headers, e.g. for radiators having conduits laterally connected to common header

Definitions

  • the invention relates to a plate-shaped heat exchanger with a continuous upper and lower end wall and a plurality of flow channels for the heat transfer medium separated between the end walls by longitudinal webs connected integrally therewith, in the free end regions of which transverse channels are arranged, into which the individual flow channels open , wherein the manifolds are tightly sealed to the outside and have integrated inflow and outflow lines for the heat transfer medium.
  • Such a plate-shaped heat exchanger is known from German Patent 34 41 842, in which the connection for the inflow lines into the transverse channels is designed as a flat nozzle.
  • This flat nozzle opens into the transverse channels in such a way that it is inserted with its flow opening in the axial direction so as to be flush with the free ends of the heat exchanger.
  • the known heat exchanger has the disadvantage that the manifolds forming the transverse channels are formed at the free ends of the heat exchanger plates by partially removing the longitudinal webs between the upper and the lower end wall of the heat exchanger.
  • the crossbars between the two end walls are cut to the appropriate length or omitted and the ends of the two end walls are then tightly connected to one another by heat and pressure and, if appropriate, interposed of adhesion promoters.
  • the heat transfer medium is admitted into the transverse channels formed in the manner described by means of pressure, spreads in the transverse channels and then flows through the flow channels separated from the longitudinal webs to the transverse channel at the opposite free end of the heat exchanger plates, in which the Outflow line for the heat transfer medium is integrated.
  • the pressurization of the transverse channels with the heat transfer medium can have the disadvantageous result that in the region of the cut-in webs when the transverse channels are pressurized, the end region of the incisions serves as a predetermined tear point and, due to the pressure of the heat transfer medium, leads in the axial direction to further tear away the webs separating the flow channels of the heat exchanger plate . This results in a relatively low pressure resistance of the heat exchanger plates overall.
  • the invention comes in, which has set itself the task of specifying a plate-shaped heat exchanger in which an axial cutting open of the webs separating the flow channels in the region of the free ends to form the transverse channels is avoided, as a result of which the webs tear away in the region when pressure is applied the cut notch is excluded.
  • the manifolds are placed as an elongated hollow body on the end wall in the associated end area of the heat exchanger plate, and that their cavity is connected to the flow channels by completely or partially removing the underlying end wall areas while maintaining the webs in this area.
  • the elongated hollow body of the collecting lines can advantageously be a tubular element which has an axially extending wall opening, on the free ends of which flange-like extensions are formed, and which is closed on its end faces.
  • the flange-like extensions can be directed both inwards and outwards.
  • This tubular element can be placed flat on the associated end wall, the interior of the tubular element, which forms the transverse channel, being connected directly to the flow channels of the heat exchanger plate via its axially extending wall opening.
  • the tubular element can also be placed on the associated end wall in a stepped manner, wherein at the same time the one continuous flange when the tubular element is connected to the heat exchanger plate can bring about the sealed closure of the flow channels from the environment.
  • the inflow and outflow lines for the heat transfer medium can be tightly embedded in the tubular element axially to the direction of the flow channels. This ensures optimal flow to the individual flow channels even with wider heat exchanger plates.
  • the tubular element can be connected on both sides, ie opposite, or alternately to the assigned surfaces of the heat exchanger plate.
  • the advantage of the invention is seen in particular in the fact that the longitudinal webs, which separate the flow channels of the heat exchanger plate, are prevented from tearing in the region of the axial incisions at the free ends of the heat exchanger plate, which form the transverse channels in the incised area according to the prior art .
  • the end walls of the heat exchanger plates are only removed on the assigned surface in the areas in which the crude elements which form the collecting lines are placed. This means that the removal takes place only to the extent that the associated end wall of the heat exchanger plate is broken.
  • the openings in the flow channels of the heat exchanger plate are made, the process of breaking through ends, so that the webs which separate the flow channels from one another also remain in the area of the openings. With this process, only the flow channels have been opened on one side.
  • the tubular element is now applied in the area of these one-sided openings of the flow channels, the wall opening running axially with respect to this tubular element being brought over the openings reaching to the flow channels.
  • connection can be made, for example, by welding, any type of welding such as ultrasonic welding, friction welding, mirror welding, etc. being usable.
  • the only requirement is that the type of connection is sealed with respect to the heat exchange medium. Since this heat exchange medium can consist of both a liquid and a gas, the connection between the flange-like extensions of the tubular element and the associated surface of the end wall must be gas and liquid-tight.
  • connection of the tubular element to the heat exchanger plate can be even, so that the heat exchanger plate must also be sealed gas and liquid-tight at its free end.
  • the connection of the tubular element can also take place in such a way that the heat exchanger plate is cut obliquely in its free end region, for example, and that the flange-like extensions of the tubular element are tightly connected to the upper end wall and to the lower end wall of the heat exchanger plate on the same inclined plane are.
  • the upper flange shoulder is tightly connected to the outer cutting area of the upper end wall and the lower flange shoulder is connected to the inner cutting area of the lower end wall.
  • the webs of the flow channels are also cut in the inclined plane in this case.
  • the arrangement of the tubular element on the heat exchanger plate can, however, also take place in stages, with one flange shoulder being placed on the surface of the upper end wall and the other flange shoulder being, for example, placed on the inner surface of the lower end wall and in both cases being tightly connected to the end walls.
  • the manifold 1 is shown as a hollow body open on one side.
  • the manifold 1 is semicircular and has in the region of the wall opening 2 at the free ends flange-like, outwardly directed extensions 3, 4.
  • the hollow body in the areas 5, 6 is sealed off from the outside.
  • the manifold 1 shown in Fig. 1 can, for example, be made in one piece as an injection molded part.
  • the manifold 1, for example in the blowing process - can also be produced in one piece. In this case, a double line could then be produced, which is separated in the area of the support surface after production.
  • a assembly from a tube, in which the end faces are subsequently sealed tightly by the regions 5 and 6, is also conceivable.
  • Fig. 2 shows the end of the heat exchanger plate 7 with attached manifold 1 in partial section. It can clearly be seen here that the flange-like extensions 3, 4 are tightly connected to the upper end wall 71 of the heat exchanger plate 7.
  • the upper end wall 71 is in the area 72, i.e. removed under the wall opening 2 of the manifold 1, so that the clear area of the manifold 1 is directly above the area 72 with the flow channels of the heat exchanger plate 7 in connection.
  • the free end 73 of the heat exchanger plate 7 is closed in a gas-tight and liquid-tight manner, as is the collecting line 1 via the flange-like extensions 3, 4 with the upper end wall 71 of the heat exchanger plate 7 in a gas-tight and liquid-tight manner.
  • the free end 73 of the heat exchanger plate 7 is provided with a bevel cut and the manifold 1 is placed tightly on the bevel 74.
  • the flange-like extension 3 of the manifold 1 is tightly connected to the outer region of the upper end wall 71, while the flange-like extension 4 is also tightly connected to the inner region of the lower end wall 75.
  • the partial section in FIG. 3 shows a web 76 in the heat exchanger plate 7 which, with its sectional area 74, adjoins the clear interior 2 of the manifold 1.
  • the other webs 76 of the heat exchanger plate 7 are also designed by the bevel cut, so that in this embodiment, seen from above in the cut area, a structure results in which the flow channels end in the bevel cut areas 74 of the webs 76.
  • the manifold 1 is shown as it is placed in a graded manner on the end of the heat exchanger plate.
  • the upper end wall 71 is removed in such a way that the cross-sections of the webs and the clear opening 2 remain upward towards the clear opening 2 of the manifold 1 the manifold 1 is connected directly to the flow channels between the individual webs 76.
  • the flange-like extension 3 is tightly applied to the surface of the upper end wall 71.
  • the flange-like extension 4 is pulled down in a stepped embodiment with the webs 76 to the area of the lower end wall 75 and is also connected there in a gas-tight and liquid-tight manner.
  • the webs 76 can be leveled during the welding, for example until a gradation as shown in FIG. 4 is achieved.
  • the welded material of the webs 76 flows in the area of the flange-like extension 4 underneath into the flow channels and thus brings about the gas and liquid-tight closing of the collecting line also in this rear end.
  • the flange-like extension 4 can also be welded down to the inner region of the lower end wall 75.
  • connection of the clear opening 2 of the manifold 1 to the flow channels of the heat exchanger plate 7 can be done, for example, that the corresponding areas of the upper end wall 71 are milled out in the width of the clear opening 2 so far that the openings to the flow channels have been made, and that the emerging cross sections of the webs are preserved.
  • FIG. 4 Such an arrangement is shown in FIG. 4.
  • the harmful tearing of notch areas, which were generated in the axial direction of the webs 76 by the axial incision, is completely eliminated in this processing method.
  • the same applies to the illustration in FIG. 3, where the webs 76 corresponding to the bevel 74 have been removed. 2 also shows an arrangement where the upper end wall 71 has been removed in the area of the clear opening 2 up to the webs.
  • the inflow and outflow lines for introducing the heat transfer medium into the manifolds 1 according to the invention can, for example, be arranged on the manifolds 1 such that they introduce the heat transfer medium into the manifold 1 axially to the flow directions of the flow channels.
  • the inflow and outflow lines can also open perpendicular to the direction of flow of the flow channels of the heat exchanger plate 7 or via the end regions 5, 6 into the manifold 1.
  • the one-sided arrangement of the manifold 1 on the heat exchanger plate 7 gives the possibility that such heat exchanger plates 7 can be laid flat, for example upwards, while the manifold 1 then protruding in the lower region into a prefabricated channel, which is, for example, in the for laying as a heat exchanger plate necessary insulation material can protrude.
  • the individual heat exchanger plates 7 are connected to one another and to the heat generator via supply and discharge lines for the heat transfer medium via corresponding inflow and outflow lines.
  • heat exchanger plates 7 are used in very large dimensions, it may be advantageous to place the manifolds 1 in sections in spatial proximity to one another. Thus - which is important for heating in the low temperature range - individual segments of an elongated heat exchanger plate 7 can be heated without the heat exchanger medium having to pass through the entire length of the heat exchanger plate 7. In this way, excessive cooling of the heat exchange medium is avoided if the flow paths are too long.

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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)
EP87106997A 1985-12-20 1987-05-14 Plattenförmiger Wärmetauscher Withdrawn EP0290655A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853545278 DE3545278A1 (de) 1985-12-20 1985-12-20 Plattenfoermiger waermetauscher

Publications (1)

Publication Number Publication Date
EP0290655A1 true EP0290655A1 (de) 1988-11-17

Family

ID=6289065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87106997A Withdrawn EP0290655A1 (de) 1985-12-20 1987-05-14 Plattenförmiger Wärmetauscher

Country Status (2)

Country Link
EP (1) EP0290655A1 (enrdf_load_stackoverflow)
DE (1) DE3545278A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3545278A1 (de) * 1985-12-20 1987-07-02 Rehau Ag & Co Plattenfoermiger waermetauscher
DE3732081A1 (de) * 1987-09-24 1989-04-06 Rehau Ag & Co Plattenfoermiger waermetauscher

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505015A1 (de) * 1974-02-07 1975-08-14 Ici Ltd Waermetauscher und verfahren zu seiner herstellung
FR2349811A1 (fr) * 1976-04-29 1977-11-25 Ici Ltd Echangeur de chaleur
EP0038490A1 (de) * 1980-04-17 1981-10-28 Hölter, Heinz, Dipl.-Ing. Vorrichtung zur Übertragung von Wärme oder Kälte auf einen diese durchströmenden Träger
DE3545278A1 (de) * 1985-12-20 1987-07-02 Rehau Ag & Co Plattenfoermiger waermetauscher

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241842C2 (de) * 1982-11-12 1985-02-21 Rehau Plastiks Ag + Co, 8673 Rehau Plattenförmiger Wärmetauscher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2505015A1 (de) * 1974-02-07 1975-08-14 Ici Ltd Waermetauscher und verfahren zu seiner herstellung
FR2349811A1 (fr) * 1976-04-29 1977-11-25 Ici Ltd Echangeur de chaleur
EP0038490A1 (de) * 1980-04-17 1981-10-28 Hölter, Heinz, Dipl.-Ing. Vorrichtung zur Übertragung von Wärme oder Kälte auf einen diese durchströmenden Träger
DE3545278A1 (de) * 1985-12-20 1987-07-02 Rehau Ag & Co Plattenfoermiger waermetauscher

Also Published As

Publication number Publication date
DE3545278A1 (de) 1987-07-02
DE3545278C2 (enrdf_load_stackoverflow) 1988-02-04

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Inventor name: DER ERFINDER HAT AUF SEINE NENNUNG VERZICHTET.