EP3872434A1 - Ensemble plaque - Google Patents

Ensemble plaque Download PDF

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Publication number
EP3872434A1
EP3872434A1 EP20461515.7A EP20461515A EP3872434A1 EP 3872434 A1 EP3872434 A1 EP 3872434A1 EP 20461515 A EP20461515 A EP 20461515A EP 3872434 A1 EP3872434 A1 EP 3872434A1
Authority
EP
European Patent Office
Prior art keywords
plate
plate assembly
assembly
opening
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.)
Granted
Application number
EP20461515.7A
Other languages
German (de)
English (en)
Other versions
EP3872434B1 (fr
Inventor
Dawid Szostek
Michal BELZOWSKI
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.)
Valeo Autosystemy Sp zoo
Original Assignee
Valeo Autosystemy Sp zoo
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 Valeo Autosystemy Sp zoo filed Critical Valeo Autosystemy Sp zoo
Priority to EP20461515.7A priority Critical patent/EP3872434B1/fr
Priority to CN202180016366.6A priority patent/CN115135949A/zh
Priority to PCT/EP2021/053627 priority patent/WO2021170436A1/fr
Publication of EP3872434A1 publication Critical patent/EP3872434A1/fr
Application granted granted Critical
Publication of EP3872434B1 publication Critical patent/EP3872434B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/007—Condensers
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0084—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/04—Reinforcing means for conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

Definitions

  • the invention relates to a plate assembly for a plate heat exchanger.
  • it relates to plate assembly for a plate heat exchanger for motor vehicle air-conditioning or heat source cooling circuits.
  • the present invention concerns a stacked-plate heat exchanger, in particular a condenser allowing heat to be exchanged between a refrigerant and a coolant in the liquid phase.
  • heat exchangers comprising a heat exchange bundle comprising a series of plates stacked parallel to each other are known.
  • the stack of plates forms heat exchange surfaces, between which a first heat exchange fluid, for example refrigerant, and a second heat exchange fluid, for example coolant, flow in alternate layers through fluid passage circuits.
  • the stack of plates is therefore configured in such a way as to define two different circuits.
  • the invention proposes a heat exchanger of the type defined hereinabove, which comprises at least one pass of a heat exchange fluid.
  • the term "pass" is to be understood to mean a group or sub-group of plates between which the fluid follows one and the same direction in one and the same sense.
  • the inlet and outlet orifices are situated, in particular, at two opposite edges of said plates.
  • the sense in which the fluid circulates is reversed. It is thus possible to lengthen the path of the fluid through the exchanger.
  • the heat exchanger may exhibit improved performance.
  • the plates comprise communication passages to allow the first heat exchange fluid and the second heat exchange fluid to pass from one flow channel to the other. They form so called distribution channels.
  • the openings may be provided alternately facing the communication passages so as to prevent fluids from mixing.
  • the plate heat exchanger may comprise a connection block mounted directly to the last plate (end plate) so as to enable connection to heat exchange fluid lines constituting a further part of the heat exchange circuit within the heat exchange system.
  • the plates may be equipped with turned-up peripheral edges, which are joined together in a sealed manner so as to delimit the first flow channels and the second flow channels.
  • One end plate is arranged at each of the ends of the stack of the plates forming the heat exchange core.
  • the plates of the stack have shapes which allow for forming channels for heat exchange fluid flow, and sometimes inducing turbulences as well, they are not flat. Consequently, the end plates, which are usually of thicker material and are generally flat, are connected to said plates only in selected connection points, with free space in-between. It is worth noting that it may be commercially viable to produce as low amount of plate types as possible. Consequently, the last plate of stack forming plates may still have an opening, even though it will not convey fluid through it - i.e. it will be sealed by an end plate.
  • a typical failure is connected with area of a distribution channel, especially on the side without connection blocks.
  • Pressure in distribution channel pushes the end plate to external side, where pressure is much lower, e.g. is equal to atmospheric pressure.
  • the unsupported area of the end plate i.e. an area, which is not connected to the next plate but which is facing the last opening of the distribution channel, is substantial and due to that, it starts to move up and down during changes to heat exchange fluid pressure. Consequently, fractures on last stack plate in area near to distribution channel may occur, as can be seen in Fig. 2 showing a prior art configuration with black line indicating a fracture location.
  • the first plate 100 is connected to the end plate 300 on one side and to the second plate 200 on the other side, thereby providing a conduit between the first plate 100 and the second plate 200 for a heat exchange fluid.
  • the fractures may occur on the raised portions, e.g. those serving as turbulators 160, which also serve as connection points between plates. Said fractures may lead to leaks between circuits, for example they may lead to movement of the oil from refrigerant circuit into coolant circuit.
  • the object of the invention is a plate assembly for a heat exchanger, comprising a first plate connected by brazing to an end plate on one side and to a second plate on the other side, thereby providing a conduit between the first plate and the second plate for a heat exchange fluid, wherein the second plate comprises an opening, wherein the first plate comprises a reinforcement element comprising a raised portion in contact with a part of edge area of the opening, wherein the reinforcement element is configured to enable flow of a heat exchange fluid through the opening and between the first plate and the second plate.
  • the reinforcement element comprises at least one flow channel delimited by the raised portion.
  • the raised portion is comprised of plurality of sections in contact with the second plate with a plurality of flow channels between them.
  • the reinforcement element comprises a wall located within the outline of the opening.
  • the wall is integral with the raised portion.
  • the wall is rounded.
  • the wall comprises a contact portion being in contact with the end plate 300.
  • the contact portion is located centrally within the outline of the opening.
  • the wall is rounded towards the second plate.
  • the wall is rounded towards the end plate.
  • the first plate comprises shaped turbulators configured to connect the first plate with the second plate by brazing.
  • the end plate has bigger thickness than the first plate.
  • the end plate has thickness equal to the first plate.
  • the first plate comprises a raised corner contact area in the vicinity of the reinforcement element, which has a corner brazed connection with the second plate.
  • the first plate further comprises a raised brazed connection with the second plate resulting from connecting the raised portion with the second plate, wherein the flow channel is located between the raised brazed connection and the corner brazed connection.
  • the object of the inventions is also a heat exchanger comprising a plate assembly as described above.
  • Fig. 1 shows a heat exchanger 1 comprising an assembly according to the invention. It comprises a heat exchanger core comprising a plurality of shaped plates, connected at the edges to form separated conduits for heat exchange fluids. In order to enhance the pressure resistance of the heat exchanger, the plates are sandwiched between a lower plate and an upper end plate.
  • the assembly according to the invention is preferably located on the bottom section of the core. It may also be located on the top section or on both simultaneously.
  • Fig. 2 shows a prior art plate assembly of prior art, with fracture between the plates indicated on the right-hand side. Said fracture occurs after repeated pressure changes in case of a first plate 100 plate having opening and a direct connection with an end plate 300 and a second plate 200 through shaped portions of the plates.
  • Fig. 3 shows a plate assembly according to the invention in an overview.
  • a plurality of channels 4 is created so that conduits for the heat exchange fluids can be connected vertically with subsequent horizontally stacked plates to enable travel of the fluids in parallel or in counterflow, depending on heat exchanger configuration. In other words, they can form distribution channels.
  • Fig. 4 shows an exploded assembly 2 of Fig. 3 in closer view.
  • the plate assembly 2 comprises a first plate 100, a second plate 200 and an end plate 300. Said plates are obtained, for example, by chasing, punching and/or molding a rolled metal sheet, for example aluminum and/or an aluminum alloy.
  • the first plate 100 is connected to the end plate 300 on one side and to the second plate 200 on the other side, thereby providing a conduit 3 between the first plate 100 and the second plate 200 for a heat exchange fluid.
  • the connection is realized by brazing side walls 105, 205, 305 of the plates to each other after stacking the plates, thereby limiting the conduits for the fluid.
  • the plates 100, 200 are further connected to each other through shaped portions, e.g. turbulators 160.
  • the plates 100, 200 comprise openings 4 for heat exchange fluid flow, with or without collars, so that after connecting the plates channels for heat exchange fluids will be created at selected places.
  • the second plate comprises an opening 210.
  • the first plate 100 comprises a reinforcement element 110.
  • the reinforcement element 110 is configured to enable flow of a heat exchange fluid through the opening 210 and between the second plate 200 and the first plate 100.
  • the reinforcement element 110 comprises a raised portion 120 in contact with a part of edge area 220 of the opening 210 of the second plate 200.
  • the contact is realized by brazing, therefore the first plate 100 and the second plate 200 are fixedly connected in this place.
  • Fig. 5a shows a cross-sectional view A of Fig. 3 in a first example
  • Fig. 5b shows a cross-sectional view B.
  • the reinforcement element 110 comprises at least one flow channel 130 delimited by the raised portion 120. This channel 130 communicates fluidly the conduit 3 and the opening 210.
  • Turbulators 160 i.e. shaped deformations on the first plate 100, are used as further connection points between the first 100 and second 200 plates.
  • Fig. 6 shows the first plate 100 of the assembly in a first example in closer view.
  • the reinforcement element 110 comprises a wall 140 with a contact portion 150 being in contact with the end plate 300, the wall 140 being located within the outline of the opening 210.
  • the wall 140 is visible when viewed through the opening 210 along its central axis.
  • the wall 140 is integral to the raised portions 120, i.e. it is formed from the same sheet of material.
  • the wall 140 is rounded. This may improve flow of the fluid and/or simplify manufacturing process. It may be rounded towards the end plate 300 as shown. It may also be rounded towards the second plate 200, in which case there would be no contact point 150 between the wall 140 and the end plate 200.
  • Fig. 7a shows a cross-sectional view A of Fig. 3 in a second example
  • Fig. 7b shows a cross-sectional view B of Fig. 3 thereof.
  • the wall 140 is distanced from the end plate 300 so that there is no contact between them.
  • the first plate 100 is not in contact with the end plate 300.
  • this example is inferior with respect to the example of Fig. 5a, 5b , it nevertheless still helps with delaying and/or preventing occurrence of the fractures on plate 100.
  • the end plate 300 may have bigger thickness than the first plate 100.
  • Fig. 8 shows an example of connection outlines between the first plate 100 and the second plate 200.
  • this figure presents schematically the brazed connections between the first plate 100 and the second plate 200 being a result of brazing their raised portions.
  • a raised brazed connection 121 is an effect of brazing of the raised portions 120 to the second plate 200 in the vicinity of the opening 210.
  • Contact portion 150 is the result of brazing of the wall 140 of the reinforcement element 110 to the end plate 300.
  • the area free of connecting portions in the vicinity of the raised portion 120 is the flow channel 130.
  • Opposite the flow channel 130 is the corner brazed connection 181, resulting of brazing the raised portion 180 of the first plate 100 in the corner area of the first plate 100.
  • Fig. 9 shows another example of connection outlines between the first plate 100 and the second plate 200.
  • the raised portion 120 is comprised of plurality of sections in contact with the second plate 200 with a plurality of flow channels 130 between them.
  • the raise portions 120 enable brazing contacts 121 as shown in Fig. 9 . In this manner, the flow of fluid is less restricted, while still maintaining good connection between the reinforcement element 110 and the second plate 200.
  • the invention allows to at least delay occurrence of fracture within the first plate.
  • the plate assembly according to the invention may be applied in water cooled condensers. Similar structure can be also used for any other plate type exchanger including plate type evaporators.

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)
EP20461515.7A 2020-02-28 2020-02-28 Ensemble plaque Active EP3872434B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20461515.7A EP3872434B1 (fr) 2020-02-28 2020-02-28 Ensemble plaque
CN202180016366.6A CN115135949A (zh) 2020-02-28 2021-02-15 板组件
PCT/EP2021/053627 WO2021170436A1 (fr) 2020-02-28 2021-02-15 Ensemble de plaques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20461515.7A EP3872434B1 (fr) 2020-02-28 2020-02-28 Ensemble plaque

Publications (2)

Publication Number Publication Date
EP3872434A1 true EP3872434A1 (fr) 2021-09-01
EP3872434B1 EP3872434B1 (fr) 2023-08-23

Family

ID=69743208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20461515.7A Active EP3872434B1 (fr) 2020-02-28 2020-02-28 Ensemble plaque

Country Status (3)

Country Link
EP (1) EP3872434B1 (fr)
CN (1) CN115135949A (fr)
WO (1) WO2021170436A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009474A1 (fr) * 1987-05-29 1988-12-01 Alfa-Laval Thermal Ab Echangeur de chaleur a plaques jointes en permanence
EP2267391A2 (fr) * 2009-06-26 2010-12-29 SWEP International AB Échangeur thermique asymétrique
WO2015082350A1 (fr) * 2013-12-05 2015-06-11 Swep International Ab Échangeur de chaleur à résistance améliorée
WO2018215425A1 (fr) * 2017-05-22 2018-11-29 Swep International Ab Système de réfrigération

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988009474A1 (fr) * 1987-05-29 1988-12-01 Alfa-Laval Thermal Ab Echangeur de chaleur a plaques jointes en permanence
EP2267391A2 (fr) * 2009-06-26 2010-12-29 SWEP International AB Échangeur thermique asymétrique
WO2015082350A1 (fr) * 2013-12-05 2015-06-11 Swep International Ab Échangeur de chaleur à résistance améliorée
WO2018215425A1 (fr) * 2017-05-22 2018-11-29 Swep International Ab Système de réfrigération

Also Published As

Publication number Publication date
CN115135949A (zh) 2022-09-30
WO2021170436A1 (fr) 2021-09-02
EP3872434B1 (fr) 2023-08-23

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