EP1047913B1 - Plattenwärmetauscher mit keilförmiger dichtung - Google Patents

Plattenwärmetauscher mit keilförmiger dichtung Download PDF

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Publication number
EP1047913B1
EP1047913B1 EP99900442A EP99900442A EP1047913B1 EP 1047913 B1 EP1047913 B1 EP 1047913B1 EP 99900442 A EP99900442 A EP 99900442A EP 99900442 A EP99900442 A EP 99900442A EP 1047913 B1 EP1047913 B1 EP 1047913B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plate
gasket
gaskets
openings
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.)
Expired - Lifetime
Application number
EP99900442A
Other languages
English (en)
French (fr)
Other versions
EP1047913A1 (de
Inventor
Benny Jensen
Ellgard Soe Pedersen
Jes Hansen Petersen
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.)
APV Heat Exchanger AS
Original Assignee
APV Heat Exchanger 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 APV Heat Exchanger AS filed Critical APV Heat Exchanger AS
Publication of EP1047913A1 publication Critical patent/EP1047913A1/de
Application granted granted Critical
Publication of EP1047913B1 publication Critical patent/EP1047913B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/10—Arrangements for sealing the margins

Definitions

  • the invention relates to a plate heat exchanger comprising a plurality of stacked heat exchanger plates which each have four through openings, and gaskets which, on one side of each plate, define a first flow area comprising two through openings for the first heat exchanger medium, while the two other openings are blocked, and, on the other side of the plate, define a second flow area which has essentially the same extent as the first flow area, and which comprises two other flow openings for the second heat exchanger medium, while the two first openings are blocked, so that the stacked heat exchanger plates form a plate heat exchanger having at least one area for each plate which is just provided with gaskets on one side.
  • Such heat exchanger plates are generally known from e.g. WO 88/03253, which discloses a plate heat exchanger comprising a plurality of heat exchanger plates having through openings defining inlet ports and outlet ports for two heat exchanger media, and rubber gaskets arranged between the heat exchanger plates.
  • Each rubber gasket defines a flow area between two heat exchanger plates, said flow area comprising two openings which constitute an inlet port and an outlet port for a first heat exchanger medium, while it seals off the flow area from the other openings in the heat exchanger plates.
  • Each of these other openings is provided with a ring-shaped rubber gasket to define a flow opening between two heat exchanger plates.
  • the rubber gasket sealing off the flow area may be connected with the ring-shaped rubber gaskets around the two other holes by means of connecting members, which, however, do not seal tightly between the plates.
  • the plate heat exchanger just contains one gasket between every second heat exchanger plate. This means that the plates of the plate heat exchanger tend to deflect in this area when the plate heat exchanger is pressurized in operation, which, of course, leads to an increased risk of leakage in precisely this area. If a leakage occurs in the bridge area, the leaking medium will flow out in the area between the bridge area and the ring-shaped gasket, following which it will be conveyed to the outer side of the heat exchanger where it may be detected.
  • the area between the bridge area and the ring-shaped gasket is therefore also called the drain area or the drained area.
  • the gasket groove for the rubber gasket is corrugated so that this portion of the plate obtains a greater rigidity.
  • This approach makes great demands on the structure of the gasket itself, as this must conform closely to the corrugations of the plate to obtain an optimum gasket, which means that the cost price of the gasket is relatively high.
  • the plates are arranged so as to rest against each other on the sides where there are no gaskets in order to prevent the individual plate from deflecting in this area.
  • some of the plate material is used for forming elevations on the side of the plate which is opposite the gasket, less material is available to form the gasket groove, which results in an increased risk of the gasket being pressed out of the gasket groove when pressure is applied to the plate heat exchanger.
  • there is a limit to the amount of material that can extend into the area without a gasket since there must be a passage for a heat exchanger medium on this side of the heat exchanger plate.
  • the object of the present invention is to provide a plate heat exchanger which minimizes the risk of leakage in the areas in which gaskets are just provided between every second heat exchanger plate.
  • the plate heat exchanger When the plate heat exchanger is arranged in this manner, it is ensured that while an increased pressure from the heat exchanger medium will try to deflect the heat exchanger plates in the areas in which there is just a gasket on one side and try to press the gaskets out of the gasket grooves, the gaskets will merely wedge themselves even more firmly between the plates, since the gaskets in said areas are wedge-shaped and the gasket grooves are shaped complementarily. This minimizes the risk of leakage in these areas compared to the known plate heat exchangers.
  • the most difficult place to obtain a leakage-proof gasket in the known plate heat exchangers in which the gaskets are positioned essentially directly opposite each other on each side of the heat exchanger plate, is in the so-called bridge area in which there just one gasket for every second plate heat exchanger.
  • the gaskets are therefore just wedge-shaped in the bridge areas which adjoin the flow area in the areas at the blocked openings.
  • the gaskets are also positioned essentially directly opposite each other on each side of the heat exchanger plates, and in this embodiment the gaskets are just wedge-shaped in the areas around the blocked openings which face the flow area, since also in this area there is just one gasket between every second heat exchanger plate.
  • the gaskets may also be wedge-shaped in both the bridge areas which adjoin the flow area in the areas at the blocked openings and in the areas around the blocked openings which face the flow area.
  • the plate heat exchanger is arranged such that the gaskets are staggered with respect to each other on each side of the heat exchanger plates, they may be wedge-shaped over their entire length. It is ensured hereby that the plate heat exchanger is sealed in the same manner everywhere, and that, in principle, it therefore has no areas which are more critical with respect to leakage than others.
  • the heat exchanger plates according to the invention are provided with a gasket groove shaped complementarily to the gasket.
  • fig. 1 shows a traditional structure of a plate heat exchanger with heat exchanger plates and gaskets
  • fig. 2 shows a heat exchanger plate with gaskets
  • fig. 3 shows a section along the line A-A in fig. 2
  • fig. 4 shows a heat exchanger plate with a staggered arrangement of gaskets
  • fig. 5 schematically shows a section along the line B-B in fig. 4.
  • Fig. 1 shows a traditional structure of a plate heat exchanger which comprises a row of identical heat exchanger plates 1 and a plurality of identical gaskets 2 arranged between the plates 1.
  • Each plate 1 is provided with four through openings 3 and 4 which define inlet and outlet ports for a first heat exchanger medium and a second heat exchanger medium, respectively.
  • the plates 1 consist of corrugated metal plates of e.g. stainless steel.
  • the corrugations are shown in the flow area 5 of the plates 1, but the plates may also be provided with corrugations in the end areas around the inlet and outlet holes 3, 4. The corrugations serve to convey the heat exchanger media toward the flow areas 5 and to provide support for the plates 1 when these are stacked and clamped to form a plate heat exchanger.
  • the plates 1 are provided with a gasket groove 6 on one side to hold a gasket 2 which will engage the opposite side of the gasket groove 6 when the plates 1 are clamped together to form the plate heat exchanger.
  • the gasket groove 6 consists of a plane area between the corrugations of the plate 1.
  • the plates 1 and the gaskets 2 are alternately turned 180°, so that a first heat exchanger medium flows on one side of each plate 1, while a second heat exchanger medium flows on the other side, thereby achieving heat exchange across the plates 1.
  • Fig. 2 shows a heat exchanger plate 1 provided with a gasket 2 which extends around the flow area 5 and two inlet/outlet holes 3 so that a first heat exchanger medium has access to the flow area 5.
  • the gasket 2 blocks the other two inlet/outlet holes 4 so that the second heat exchanger medium does not have access to this side of the plate 1.
  • the gasket 2 (and the succeeding plate 1) is turned 180°, as shown in fig. 1, which means that the gasket 2 on this opposite side extends as shown in dashed line, so that it blocks the inlet/outlet holes 3, while the inlet/outlet holes 4 and the flow area 5 communicate.
  • the gaskets 2 are preferably positioned directly opposite each other when the plate heat exchanger is assembled, but since the inlet/outlet holes 3, 4 alternately communicate with the flow area 5, there will be areas in which there are just gasket parts for every second plate 1. This applies to e.g. the so-called bridge area 7 and to the part 8 of the gasket 2 around the blocked inlet/outlet hole 4 which faces the flow area. Since, following assembly of the plate heat exchanger, the plates 1 are just supported in these areas between every second plate 1, the plates 1 tend to deflect in these areas when the plate heat exchanger is pressurized in operation. This is particularly problematic in connection with the bridge area 7 which has a relatively long extent.
  • the deflection in the bridge area is minimized by corrugating the plate 1 close to the gasket 2, so that two plates 1 without a gasket 2 may adjoin each other in this area to compensate for the absence of a gasket 2.
  • flow of the second heat exchanger medium must still be possible between the plates 1, which puts a limit to the degree of corrugation.
  • this corrugation also has the effect that less material is available to hold the gasket 2, thereby increasing the risk of the gasket being pressed out of the gasket groove 6.
  • Fig. 3 shows a section along the line A-A in fig. 2 when several plates 1 are stacked to form a plate heat exchanger in a preferred embodiment of the invention.
  • the gasket 2 has a cross-section in the bridge area 7 which is substantially wedge-shaped over the entire width.
  • the gasket 2 is positioned in a gasket groove 6 in the plates 1, and this gasket groove 6 has a shape complementary to the gasket 2.
  • corrugations are shown on both sides of the gasket groove 6, which partly contribute to holding the gasket 2 in the gasket groove 6 and partly support the plates 1 against each other and impart rigidity to the plates 1.
  • the gasket 2 is shaped such that it closely matches the corrugations of the plates 1.
  • Fig. 4 shows an alternative heat exchanger plate 11 with staggered gasket grooves on each side, so that on one side of the plate 11 (shown in solid line) the gasket 12 is staggered with respect to an identical gasket 12 turned 180° on the other side (shown in dashed line).
  • the gasket 12 When the gasket 12 is positioned in this manner with respect to the plate 11, it may be wedge-shaped over its entire extent, it being possible to provide the plate 11 with oppositely directed inclined faces to form staggered gasket grooves on each side of the plate 11.
  • fig. 5 shows a basic section along the line B-B in fig. 4 and illustrates the structure of a plate heat exchanger with staggered gaskets 12 positioned in staggered gasket grooves 13, 14 on each side of the plate 11 to support the gaskets 12.
  • one side (the upper side) of the gaskets 12 extends in parallel with the extent of the heat exchanger plates 11, while the other side (the underside) extends obliquely with respect thereto, so that the cross-section as a whole is wedge-shaped.

Landscapes

  • 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)

Claims (5)

  1. Plattenwärmetauscher, der mehrere übereinandergestapelte Wärmetauscherplatten (1; 11), die jeweils vier Durchgangsöffnungen (3, 4) besitzen, und Dichtungen (2; 12) umfaßt, wobei die Dichtungen (2; 12) auf einer Seite jeder Platte (1; 11) einen ersten Strömungsbereich (5) definieren, der zwei Durchgangsöffnungen (3) für ein erstes Wärmetauschermedium aufweist, während die beiden anderen Öffnungen (4) versperrt sind, und auf der anderen Seite der Platte (1; 11) einen zweiten Strömungsbereich definieren, der im wesentlichen die gleiche Größe wie der erste Strömungsbereich (5) hat und zwei andere Durchgangsöffnungen (4) für ein zweites Wärmetauschermedium besitzt, während die beiden ersten Öffnungen (3) versperrt sind, so daß die übereinandergestapelten Wärmetauscherplatten (1; 11) einen Plattenwärmetauscher bilden, der für jede Platte (1; 11) wenigstens einen Bereich (7, 8) besitzt, der lediglich mit Dichtungen (2; 12) auf einer Seite versehen ist, dadurch gekennzeichnet, daß die Dichtung (2; 12) wenigstens in einem Bereich, in dem Dichtungen (2; 12) lediglich zwischen jeder zweiten Platte (1; 11) vorgesehen sind, einen Querschnitt besitzt, der über einen erheblichen Teil der Breite der Dichtung keilförmig ist, wobei die breiteste Seite dem Wärmetauschermedium zugewandt ist und die schmalste Seite vom Wärmetauschermedium abgewandt ist, und daß jede Wärmetauscherplatte (1; 11) in diesem Bereich eine komplementär geformte Dichtungsnut (6; 14, 15) besitzt, die die Dichtung (2; 12) trägt.
  2. Plattenwärmetauscher nach Anspruch 1,
    dadurch gekennzeichnet, daß die Dichtungen (2) auf jeder Seite der Wärmetauscherplatten (1) im wesentlichen direkt einander gegenüber angeordnet sind und daß sie lediglich in den Überbrückungsbereichen (7), die an den Strömungsbereich (5) in den Bereichen bei den versperrten Öffnungen (4) angrenzen, keilförmig sind.
  3. Plattenwärmetauscher nach Anspruch 1,
    dadurch gekennzeichnet, daß die Dichtungen (2) auf jeder Seite der Wärmetauscherplatten (1) im wesentlichen direkt einander gegenüber angeordnet sind und daß sie lediglich in den Bereichen (8) um die versperrten Öffnungen (4), die dem Strömungsbereich (5) zugewandt sind, keilförmig sind.
  4. Plattenwärmetauscher nach Anspruch 1,
    dadurch gekennzeichnet, daß die Dichtungen (2) auf jeder Seite der Wärmetauscherplatten (1) im wesentlichen direkt einander gegenüber angeordnet sind und daß sie sowohl in den Überbrückungsbereichen (7), die an den Strömungsbereich (5) in den Bereichen der versperrten Öffnungen (4) angrenzen, als auch in den Bereichen (8) um die versperrten Öffnungen (4), die dem Strömungsbereich (5) zugewandt sind, keilförmig sind.
  5. Plattenwärmetauscher nach Anspruch 1,
    dadurch gekennzeichnet, daß die Dichtungen (12) auf jeder Seite der Wärmetauscherplatten (11) relativ zueinander versetzt angeordnet sind und daß sie auf ihrer gesamten Länge im wesentlichen keilförmig sind.
EP99900442A 1998-01-12 1999-01-11 Plattenwärmetauscher mit keilförmiger dichtung Expired - Lifetime EP1047913B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK2898 1998-01-12
DK2898A DK174780B1 (da) 1998-01-12 1998-01-12 Pladevarmerveksler med kileformet pakning
PCT/DK1999/000012 WO1999035457A1 (en) 1998-01-12 1999-01-11 A plate heat exchanger having a wedge-shaped gasket

Publications (2)

Publication Number Publication Date
EP1047913A1 EP1047913A1 (de) 2000-11-02
EP1047913B1 true EP1047913B1 (de) 2003-08-27

Family

ID=8088932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99900442A Expired - Lifetime EP1047913B1 (de) 1998-01-12 1999-01-11 Plattenwärmetauscher mit keilförmiger dichtung

Country Status (5)

Country Link
EP (1) EP1047913B1 (de)
AU (1) AU1960599A (de)
DE (1) DE69910729T2 (de)
DK (1) DK174780B1 (de)
WO (1) WO1999035457A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE528847C2 (sv) * 2005-01-28 2007-02-27 Alfa Laval Corp Ab Packningsaggregat för plattvärmeväxlare

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH204604A (de) * 1936-04-22 1939-05-15 Aluminium Plant & Vessel Co Bauelement für Wärmeaustauscher.
CH284574A (fr) * 1947-02-24 1952-07-31 Cherry Burrell Corp Plaque pour un appareil du genre dans lequel des plaques sont maintenues parallèlement l'une près de l'autre avec des joints entre elles pour former un espace de circulation étanche entre deux plaques voisines.
US2790627A (en) * 1955-01-03 1957-04-30 Creamery Package Mfg Co Plate type heat exchanger
DE1149027B (de) * 1961-03-14 1963-05-22 Basf Ag Dichtanordnung fuer Plattenwaermetauscher, bestehend aus weicheren Dichtungen, die zwischen haerteren Dichtungen liegen
US3195625A (en) * 1961-11-08 1965-07-20 Meredith C Thomson Heat exchanger plate and seal
DE1952802A1 (de) * 1969-10-21 1971-04-29 Theodor Beck Vario-Blinker fuer Kfz
ATE127909T1 (de) * 1991-07-08 1995-09-15 Apv Baker As Wärmetauscher mit mehrschichtigen plattenelementen.

Also Published As

Publication number Publication date
DE69910729T2 (de) 2004-06-17
AU1960599A (en) 1999-07-26
DK174780B1 (da) 2003-11-03
EP1047913A1 (de) 2000-11-02
DK2898A (da) 1999-07-13
DE69910729D1 (de) 2003-10-02
WO1999035457A1 (en) 1999-07-15

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