EP2267391B1 - Asymmetrischer Wärmetauscher - Google Patents

Asymmetrischer Wärmetauscher Download PDF

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Publication number
EP2267391B1
EP2267391B1 EP10167552.8A EP10167552A EP2267391B1 EP 2267391 B1 EP2267391 B1 EP 2267391B1 EP 10167552 A EP10167552 A EP 10167552A EP 2267391 B1 EP2267391 B1 EP 2267391B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
plates
plate
grooves
ridges
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.)
Active
Application number
EP10167552.8A
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English (en)
French (fr)
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EP2267391A3 (de
EP2267391A2 (de
Inventor
Tomas Dahlberg
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.)
Swep International AB
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Swep International AB
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Publication date
Application filed by Swep International AB filed Critical Swep International AB
Publication of EP2267391A2 publication Critical patent/EP2267391A2/de
Publication of EP2267391A3 publication Critical patent/EP2267391A3/de
Application granted granted Critical
Publication of EP2267391B1 publication Critical patent/EP2267391B1/de
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Classifications

    • 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
    • F28F3/046—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 linear, e.g. corrugations

Definitions

  • the present invention relates to a plate heat exchanger comprising a start plate, an end plate, and at least two heat exchanger plates placed there between.
  • the heat exchanger plates are provided with a pressed pattern of ridges and grooves adapted to keep the plates on a distance from one another, such that flow channels (N,W) are formed between the plates.
  • Brazed heat exchangers generally comprise a number of heat exchanger plates provided with a pressed pattern of ridges and grooves, said ridges and grooves of neighboring plates cooperating to form flow channels between neighboring plates. Port openings are provided for achieving communication with some of the flow channels and for sealing off other flow channels.
  • a prior art method for achieving asymmetric heat exchangers is to provide plates with a pressed pattern of ridges and grooves, where e.g. every other ridge has a smaller press depth than the other ridges.
  • a symmetric plate heat exchanger comprising a plurality of stacked heat exchanger plates provided with a pressed pattern of ridges and grooves is known from US 6 478 081 .
  • the plates are brazed to each other at their contact points.
  • the object of the present invention is to provide a brazed asymmetric heat exchanger having improved pressure handling capability as compared to an ordinary brazed heat exchanger for the small flow channel, and similar pressure handling capability as an ordinary heat exchanger for the large channels.
  • the above object is solved by a heat exchanger where the ridges or grooves are provided with indentations adapted for housing a ridge or groove of a neighboring plate.
  • FIG. 1 an asymmetric heat exchanger 100 having aspects of the present invention is shown.
  • the heat exchanger 100 comprises a start plate 110 (not visible in Fig 1 ), an end plate 120 and a number of heat exchanger plates 130, 130'.
  • the heat exchanger 100 is also provided with four port openings 140a, 140b, 150a, 150b.
  • the port openings 140a, 140b are significantly smaller than the port openings 150a, 150b. The reason for this difference in size will b explained later.
  • a heat exchanger plate 130, 130' is shown schematically. Also, section cuts A-A, B-B, C-C and D-D are shown. The sections taken along these lines are shown in Figs. 3a-3d . The size difference between the port openings 140a, 140', 140b140b' and 150a, 150b' and 150b, 150b' is more clearly visible in Fig. 2 as compared to Fig. 1 .
  • Fig. 3a which is a section cut along the line D-D in Fig. 2 , eight heat exchanger plates 130, 130' delimiting four wide channels W and three narrow channels N are placed between the start plate 110 and the end plate 120. It can be clearly seen that the narrow channels N are delimited by two neighboring plates 130, 130', having a small distance to one another, whereas the wide channels W are formed by two heat exchanger plates 130', 130 having a large distance to one another. The reason for this difference will be explained later.
  • Fig. 3b which is a section taken along the line A-A of Fig. 2 , the port openings 140a, 150a are shown. As can be seen, the port opening 140a communicates with the narrow channels N, whereas the port opening 150a communicates with the wide channels W.
  • Fig. 3c which is a section view along the line B-B in Fig. 2 , the port openings 140a, 140b, the eight heat exchanger plates 130, 130' and their corresponding channels N and W are shown.
  • the port openings 140a, 140b will communicate through the narrow channels N.
  • Fig. 3d is a section view taken along the line C-C of Fig. 2 , and shows the port openings 150a, 150b in communication with each other via the wide channels W.
  • Fig. 4 shows two heat exchanger plates 130, 130' which, when stacked onto one another in this order will form a narrow flow channel N.
  • the plates 130, 130' differ slightly from one another:
  • the plate 130' is provided with two port openings 140a', 140b' provided on a high level, two port openings 150a' and 150b' placed on an intermediate level, ridges R' provided on a high level and grooves G' provided on a low level.
  • the grooves G' are provided with indentations I' on the intermediate level.
  • the indentations I will contact the indentations I', and the resulting contact point will be very strong; in a way, the contact will resemble a handshake. Also, there will be large contact points between the plates, which will give a high strength to the narrow channel N.
  • Fig. 5 the plates 130, 130' are oppositely placed as compared to Fig. 4 . This means that there will be no interaction between the grooves I and I'. Rather, the ridges R' of the plate 130'will contact the grooves G of the plate 130. Consequently, the distance between the plates 130, 130' placed according to Fig. 5 will be larger than when they are placed according to Fig. 4 .
  • the areas surrounding the port openings 140a', 140b' will contact the areas surrounding the port openings 140a and 140b in the same way the port openings 150a, 150b contact the port openings 150a' and 150b' when the heat exchanger plates are placed according to Fig. 4 .
  • the asymmetrical property concerning flow resistance comes from the fact that every other channel will be a narrow channel N, and the rest of the cannels will be wide channels W.
  • the wide channels W will exhibit a lower flow resistance (i.e. pressure drop) for a fluid to exchange heat than the narrow channels N.
  • the asymmetrical property concerning the capability to withstand an internal pressure emanates from the fact that the contact points between the indentations I and I' (occurs in a narrow channel N) are significantly larger than the contact points between the ridges R' and the grooves G (which occurs in a wide channel W).
  • the port openings 140 and 150 are of different size in the described embodiment. There are at least three reasons that the port openings may have different sizes:
  • a typical use of a heat exchanger according to the present invention may be in a heat pump for domestic heating.
  • a heat pump generally extracts low temperature heat from a low temperature source, often a brine (e.g. a mixture of water and alcohol), which is under a relatively low pressure, by exchanging heat between the brine and a refrigerant (which generally has a high pressure), whereupon the heat absorbed by the refrigerant is made transformed into high temperature heat by a general cooling cycle.
  • Typical temperatures in the heat exchanger for exchanging heat between the brine and the refrigerant may be 0-5 degrees C for the brine and -5 to -20 degrees C for the refrigerant.
  • four plates 130 and four plates 130' form seven channels, three narrow channels N and four wide channels W.
  • the wide channels W are placed closest to the start- and end endplates 110, 120, respectively. If the order of the heat exchanger plates 130, 130' would be different, a heat exchanger exhibiting four narrow channels would be achieved, but there is a certain benefit with the shown configuration, namely that the medium flowing in the wide channels generally have a temperature more similar to the ambient temperature.
  • the heat exchanger according to the present invention is brazed. Brazing of heat exchanger is a method well known by persons skilled in the art, and shall hence not be describe in more detail.
  • One such modification may e.g. be to arrange more port openings in the heat exchanger plates, and allow selective communication with different flow channels for these ports.
  • the selective communication can be achieved in several different ways, arranging rings having an inner diameter equaling the diameter of the port opening and a thickness equaling the distance between two neighboring plates is one way of sealing off communication between a port and a flow channel.

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 (2)

  1. Gelöteter Plattenwärmetauscher (100) mit einer Anfangsplatte (110), einer Endplatte (120) und mit mindestens zwei Wärmetauscherplatten (130, 130'), die dazwischen angeordnet sind und mit einem gepressten Muster von Rippen (R) und Rillen (G) versehen sind, die zum Halten der Platten in einem Abstand voneinander derart eingerichtet sind, dass Strömungskanäle (N, W) zwischen den Platten ausgebildet sind, wobei Kontaktpunkte zwischen den Rippen und Rillen benachbarter Platten ausgebildet sind, wobei die Kontaktpunkte zum Bereitstellen von Lötpunkten zum Zusammenhalten der Platten eingerichtet sind, dadurch gekennzeichnet, dass die Rippen (R) und Rillen (G) mit Vertiefungen (I, I') versehen sind, die zur Aufnahme einer Rippe (R) oder einer Rille (G) einer benachbarten Platte geeignet sind, wobei die Vertiefungen der Rippen (R) und der Rillen (G) der benachbarten Platten einander zugewandt und derart ausgerichtet sind, dass die Vertiefungen (I, I') der benachbarten Platten einander derart kontaktieren, dass der Kontakt einem Handschlag ähnlich ist.
  2. Gelöteter Plattenwärmetauscher nach Anspruch 1, wobei vier Anschlussöffnungen (140a, 140a', 150b, 150b') angeordnet sind, um selektiv mit Strömungskanälen (N, W) in Verbindung zu stehen, welche durch die Wärmetauscherplatten (130, 130') gebildet werden.
EP10167552.8A 2009-06-26 2010-06-28 Asymmetrischer Wärmetauscher Active EP2267391B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0950497 2009-06-26

Publications (3)

Publication Number Publication Date
EP2267391A2 EP2267391A2 (de) 2010-12-29
EP2267391A3 EP2267391A3 (de) 2014-02-26
EP2267391B1 true EP2267391B1 (de) 2018-04-11

Family

ID=42801114

Family Applications (1)

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EP10167552.8A Active EP2267391B1 (de) 2009-06-26 2010-06-28 Asymmetrischer Wärmetauscher

Country Status (3)

Country Link
EP (1) EP2267391B1 (de)
PT (1) PT2267391T (de)
TR (1) TR201809058T4 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10903537B2 (en) 2019-01-31 2021-01-26 Toyota Motor Engineering & Manufacturing North America, Inc. Optimized heat conducting member for battery cell thermal management

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011106764A (ja) * 2009-11-19 2011-06-02 Mitsubishi Electric Corp プレート式熱交換器及びヒートポンプ装置
JP2014016144A (ja) * 2012-07-05 2014-01-30 Airec Ab 熱交換器用プレート、熱交換器、ならびに熱交換器を備えた空気冷却装置
JP6154122B2 (ja) 2012-12-12 2017-06-28 株式会社マーレ フィルターシステムズ 多板積層式熱交換器
ITPD20130187A1 (it) * 2013-07-03 2015-01-04 Zilmet S P A Scambiatore asimmetrico con canali ausiliari di collegamento fra spire
EP3062949B2 (de) * 2013-10-29 2023-05-24 SWEP International AB Verfahren zum löten eines plattenwärmetauschers anhand eines mittels siebdruck hergestellten lötmaterials
US10837717B2 (en) * 2013-12-10 2020-11-17 Swep International Ab Heat exchanger with improved flow
KR102350020B1 (ko) * 2014-05-27 2022-01-11 스웹 인터네셔널 에이비이 열교환기
PT2988085T (pt) * 2014-08-22 2019-06-07 Alfa Laval Corp Ab Placa de transferência de calor e permutador de calor de placas
JP6645579B2 (ja) * 2016-06-07 2020-02-14 株式会社デンソー 積層型熱交換器
DE102018002201B4 (de) 2018-03-19 2021-03-18 EAW Energieanlagenbau GmbH Westenfeld Wasser-Lithiumbromid-Absorptionskälteanlage
DK180387B1 (en) * 2019-10-24 2021-02-26 Danfoss As Intellectual Property Plate kind heat exchanger with end plates
CN113154911B (zh) * 2020-01-22 2023-03-03 丹佛斯有限公司 用于板式换热器的盖板和板式换热器
EP3872434B1 (de) * 2020-02-28 2023-08-23 Valeo Autosystemy SP. Z.O.O. Plattenanordnung
SE545724C2 (en) * 2020-07-17 2023-12-19 Swep Int Ab A double wall plate heat exchanger

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US6478081B1 (en) * 1999-08-04 2002-11-12 Apv North America Inc. Plate heat exchanger
EP1630510A1 (de) * 2004-08-28 2006-03-01 SWEP International AB Plattenwärmetauscher

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US6478081B1 (en) * 1999-08-04 2002-11-12 Apv North America Inc. Plate heat exchanger
EP1630510A1 (de) * 2004-08-28 2006-03-01 SWEP International AB Plattenwärmetauscher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10903537B2 (en) 2019-01-31 2021-01-26 Toyota Motor Engineering & Manufacturing North America, Inc. Optimized heat conducting member for battery cell thermal management

Also Published As

Publication number Publication date
EP2267391A3 (de) 2014-02-26
TR201809058T4 (tr) 2018-07-23
PT2267391T (pt) 2018-06-20
EP2267391A2 (de) 2010-12-29

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