EP4343257A1 - Plattenwärmetauscher - Google Patents

Plattenwärmetauscher Download PDF

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Publication number
EP4343257A1
EP4343257A1 EP22196564.3A EP22196564A EP4343257A1 EP 4343257 A1 EP4343257 A1 EP 4343257A1 EP 22196564 A EP22196564 A EP 22196564A EP 4343257 A1 EP4343257 A1 EP 4343257A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
heat exchange
fins
guiding ribs
plates
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.)
Pending
Application number
EP22196564.3A
Other languages
English (en)
French (fr)
Inventor
Mattias NORÉN
Håkan Larsson
Kamran HAGHIGHI
Maria NAVASA GUASCH
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.)
Alfa Laval Corporate AB
Original Assignee
Alfa Laval Corporate AB
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 Alfa Laval Corporate AB filed Critical Alfa Laval Corporate AB
Priority to EP22196564.3A priority Critical patent/EP4343257A1/de
Priority to PCT/EP2023/075639 priority patent/WO2024061823A1/en
Publication of EP4343257A1 publication Critical patent/EP4343257A1/de
Pending 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • F28F9/0268—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box in the form of multiple deflectors for channeling the heat exchange medium
    • 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
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • 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 disclosure relates to a plate heat exchanger. More specifically, the disclosure relates to a plate heat exchanger as defined in the introductory parts of the independent claims.
  • Plate heat exchangers which are permanently joined to each other, do not require separate sealings between the plates and no external frame to hold the plates together. Instead of an external frame, the plates can be permanently joined by brazing, soldering, welding or gluing.
  • the joints between the plates have a pressure bearing function and can thus resist pressures from the heat exchange medium in the plate heat exchangers. Joints may be formed by a joining method in which the plates are subjected to a heat lower than the melting point of the plates.
  • Such joining methods may be one of brazing with an added brazing material in the form of a foil, a paste, or a powder comprising e.g., copper or nickel, or joining by means of the material of the plates by application of a melting depressant composition applied to the plates prior to being heated e.g., as discussed in document WO2013144211A1 .
  • the inlet and outlet channels in the port portions of the plates have large projected areas and are provided with connecting joints between the heat exchanger plates.
  • the diameter of the inlet and outlet channels is increased, so that the exposed area of the channels in direction of flow passages in the heat exchanger increases.
  • the flow of the heat exchange medium between the plates in the heat exchanger is more evenly distributed when the diameter of the inlet and outlet channels is increased.
  • the distance between the inlet and outlet channels may influence on the distribution of the heat exchange medium between the plates.
  • Document KR1020180028704 A discloses a plate heat exchanger comprising heat exchanger plates, which are provided with distribution channels pressed directly in the heat exchanger plate.
  • the distribution channels are shaped from grooves pressed in the heat exchanger plate.
  • Heat exchange medium introduced through a fluid inlet is divided into several branches, which are constituted by the distribution channels.
  • the heat exchange medium is distributed to a fin insert. After the heat exchange medium has passed the fin insert, the heat exchange medium is guided through another set of distribution channels for gathering the heat exchange medium to a fluid outlet.
  • Distribution of the heat exchange medium from the inlet channel to the fins may in different situations be critical, since the distribution of the heat exchange medium, in the heat transfer portion in which the fin insert is situated, affects the heat transfer performance of the plate heat exchanger.
  • An uneven distribution of the heat exchange medium in the heat transfer portion may decrease the heat transfer performance.
  • the uneven distribution of heat exchange medium may depend on how the distribution channels in the heat exchanger plate mesh with the heat transfer portion. Further, any differences or irregularities such as bypass channels in the shape or outfit of the heat exchange portion may affect the heat transfer performance due to uneven distribution of the heat exchange medium in the heat transfer portion. Further, when increasing the overall dimensions of the plate heat exchanger, the flow of the heat exchange medium between the plates in the heat exchanger may be subjected to turbulence affecting the heat transfer performance of the plate heat exchanger.
  • It is an object to of the present invention is to provide a plate heat exchanger with increased heat exchange performance.
  • a plate heat exchanger comprising: a package of heat exchanger plates, each having a peripheral portion and several port portions with through flow ports; wherein the heat exchanger plates are permanently joined to adjacent heat exchanger plates of the package along their peripheral portions in such manner that they leave flow passages in a heat exchange portion between adjacent heat exchanger plates; wherein the through flow ports of the heat exchanger plates are aligned and form first inlet and outlet channels through the package for a first heat exchange medium, which communicate with every other flow passage between the heat exchanger plates, and second inlet and outlet channels through the package for a second heat exchange medium, which communicate with remaining flow passages between the heat exchanger plates; and wherein along each of the inlet and outlet channels, the port portions of adjacent heat exchanger plates, which form a flow passage separated from the inlet and outlet channel, respectively, are permanently joined around the inlet and outlet channel, respectively, between an outer line and an inner line, which inner line is located closer to the Inlet and outlet channel, respectively, characterised in that first guiding rib
  • the plate heat exchanger may comprise a number of heat exchanger plates, which are arranged above each other between an upper, outer cover plate and a lower, outer cover plate.
  • the ports of the heat exchanger plates are aligned, so that they form an inlet channel and an outlet channel, which at the bottom are limited by the non-penetrated port portions of the lower, outer cover plate and which at the top communicate with the inlet pipe and the outlet pipe, respectively.
  • the heat exchanger may have one inlet channel and one outlet channel for each of the two heat exchange media, which Inlet and outlet channels are located in the end portions of the heat exchanger plates.
  • the heat exchanger can alternatively be provided with several inlet or outlet channels. The shape of the channels and the location can be chosen freely.
  • the flow of the first and second heat exchange medium may be in parallel in the heat exchange portion of the heat exchanger.
  • the first inlet and outlet channels may be diagonally arranged in relation to the parallel flow in the heat exchange portion.
  • the second inlet and outlet channels may be diagonally arranged in relation to the parallel flow in heat exchange portion.
  • the first inlet and outlet channels may be aligned in relation to the parallel flow in heat exchange portion.
  • the second inlet and outlet channels may be aligned in relation to the parallel flow in heat exchange portion.
  • the number of heat exchanger plates of the heat exchanger form together a package of heat exchanger plates.
  • the heat exchanger plates may have a rectangular form, but other forms could be possible, such as round heat exchanger plates.
  • the number of heat exchanger plates of the heat exchanger is depending on desired capacity.
  • For the joining of the heat exchanger a suitable amount of plates are piled on each other, whereupon adjacent plates are joined together by brazing, soldering, welding or gluing. Adjacent heat exchanger plates are permanently joined to each other. Therefore, no separate gaskets are required between the plates and neither any outer frame to hold the plates together.
  • the expression permanently joined refers mainly to brazing, but also for example soldering, welding or gluing. Joints may be formed by a joining method in which the plates are subjected to a heat lower than the melting point of the plates.
  • Such joining methods may be one of brazing with an added brazing material in the form of a foil, a paste, or a powder comprising e.g., copper or nickel, or joining by means of the material of the plates by application of a melting depressant composition applied to the plates prior to being heated.
  • the peripheral portion of the heat exchanger plates may be provided with a flank and a brim.
  • the flank of one heat exchanger plates may be joined to the flank of one adjacent heat exchanger plate.
  • the joined flanks will ensure a fluid tight connection along the peripheral portion of the heat exchanger plates.
  • the brim increases the stiffness and overall strength of the plate heat exchanger. The brim may however be excluded from the heat exchanger plate.
  • the port portions surround an inlet or outlet channel, which communicating with the flow passages formed by the plates.
  • the port portions may be placed in the two end planes of the plates, located furthest from each other.
  • the at least one connection part within the above said inner line in each port portion also avoids that the ports of the plate become oval during manufacturing of the plates.
  • the connection parts may be formed as integral parts of respective heat exchanger plate. Alternatively, the connection parts may be formed of loose elements arranged between the heat exchanger plates.
  • Flow passages are configured between adjacent plates. In the flow passages the heat exchange medium flows through the plate heat exchanger. Adjacent heat exchanger plates are connected and bounded together at several positions on their surfaces. Between these bonding positions, the flow passages are left.
  • the heat exchange portion is arranged between adjacent plates and between the end portions of the heat exchanger.
  • heat is transferred from one of the heat exchange medium to the other heat exchange medium.
  • Stacking the individual heat exchanger plates on each other will align the through flow ports of the plates.
  • the aligned through flow ports form inlet and outlet channels through the package of plates.
  • the first inlet and outlet channels communicate with every other flow passage between the heat exchanger plates.
  • the second inlet and outlet channels communicate with the remaining flow passages between the heat exchanger plates. There is only heat exchange between every other flow passage and the remaining flow passages but no fluid communication between these separated passages.
  • the inner line is located closer to the Inlet and outlet channel, respectively, than the outer line.
  • Plate interspaces are located in an area around the inlet and outlet channel, respectively, located between the outer line and the inlet or outlet channel itself.
  • the at least one connection part is arranged in the plate interspace along each of the inlet and outlet channels.
  • the first and second guiding ribs may be configured as separate parts or as integral parts of the heat exchanger plate.
  • the first and second guiding ribs are arranged at the port portions of the plates.
  • the first and second guiding ribs may extend between the area of the throw flow ports and the area of the heat exchange portion.
  • the first and second guiding ribs may be configured to guide the first and second heat exchange medium in both directions along and between the ribs.
  • the first and second guiding ribs may also be configured to guide and positioning the heat exchange portion within the heat exchanger plate.
  • the heat exchange portion may be a separate part from the heat exchanger plate, which may be positioned between the port portions, which are provided with the first and second guiding ribs.
  • the heat exchange portion may first be positioned between the port portions and guided to a correct position by the first and second guiding ribs, where after the heat exchange portion is firmly connected to the heat exchanger plate by for example brazing, soldering, welding or gluing.
  • the plate heat exchanger provided with the above-mentioned guiding ribs will increase the heat exchange performance of the plate heat exchanger.
  • the first and second guiding ribs may constitute an integral part of a heat exchanger plate.
  • the first and second guiding ribs may be manufactured simultaneously with the heat exchanger plate.
  • the first and second guiding ribs may be permanently joined to the heat exchanger plate.
  • the heat exchanger plates may be made of thin material and be provided with the first and second guiding ribs shaped on one side, each first and second guiding rib being shaped in the port portion of a heat exchanger plate.
  • the first and second guiding ribs may be shaped in the surface of the heat exchanger plate during manufacturing of the plate.
  • the manufacturing of the ribs may be shaped in a second step after the plate has been has been manufactured in a first step.
  • the first and second guiding ribs may be arranged in a separate sheet element, and wherein such sheet elements are arranged in the respective port portion.
  • the separate sheet may be made of thin material.
  • the first and second guiding ribs may be shaped in a surface of the separate sheet element.
  • the separate sheet elements may be connected to the respective port portion and permanently joined to the heat exchanger plate by brazed, soldered, welded or glued joints.
  • the height of the first and second guiding ribs may correspond to the distance between two adjacent heat exchanger plates in the port portions, respective.
  • the first and second guiding ribs may extend between two adjacent heat exchanger plates.
  • the space between the ribs leave flow passages, which define guide passages for the heat exchange media.
  • the first and second guiding ribs may be brazed, soldered, welded or glued to the surfaces of adjacent plates. However, a part of the ribs along the length of the ribs may have a reduced height.
  • Fins may be arranged in the heat exchange portion of the flow passages between the adjacent heat exchanger plates, which fins may create a number of parallel guide channels for each of the first and second heat exchange medium, respective.
  • the fins may guide the flow of the first and second heat exchange medium in parallel through the heat exchange portion.
  • the fins may be made of thermally conductive material, such as steel or an aluminum alloy.
  • a number of individual fins may be arranged in parallel in the heat exchange portion, extending in a longitudinal direction of the heat exchanger, and creating guide channels between the individual fins. Alternatively, the individual fins may be connected to each other.
  • Each parallel guide channel may be delimited by walls of the fins and a heat exchanger plate.
  • Each fin may extend between two adjacent heat exchanger plates. The surfaces of the two adjacent plates and the surfaces of two adjacent fins may define one guide channel.
  • the fins may be brazed, soldered, welded or glued to the surfaces of two adjacent plates.
  • the distance between the fins and the distance between the plates affects the shape and size of the cross-sectional area of the individual guide channel.
  • the distance between the fins may also decide the number of fins and channels in the heat exchange portion.
  • the shape and the size of the cross-sectional area of the individual guide channel may have an impact on the volume flow of the heat exchange medium in the guide channel.
  • the fins may be created by a corrugated sheet metal, which has wave peaks and wave troughs.
  • the fins may be created by a pleated sheet of thermally conductive material.
  • the fins may have a wave shape.
  • the parallel guide channels may be created between wave peaks and between wave troughs of the wave shaped fins.
  • the wave peaks may be configured to be rigidly connected to a heat exchanger plate, and the wave troughs may be configured to be rigidly connected to an adjacent heat exchanger plate in the heat exchange portion between the adjacent heat exchanger plates.
  • the wave peaks and the wave troughs may be brazed, soldered, welded or glued to the surfaces of two adjacent plates.
  • the distance between the wave peaks, the distance between the wave troughs and the distance between the plates affects the shape and size of the cross-sectional area of the individual guide channel.
  • the distance between the wave peaks and the distance between the wave troughs may also decide the number of fins and channels in the heat exchange portion.
  • the shape and the size of the cross-sectional area of the individual guide channel may have an impact on the volume flow of the heat exchange medium in the guide channel.
  • the wave height of the fins of the corrugated sheet metal may corresponds to the distance between two adjacent heat exchanger plates in the heat exchange portion.
  • the wave height of the fins of the corrugated sheet metal may correspond to the distance between two adjacent heat exchanger plates in the heat exchange portion.
  • the wave peaks and the wave troughs of the fins may extend between two adjacent heat exchanger plates.
  • the surface of one of the two adjacent plates and the surfaces of two adjacent fins having a common wave peak define one guide channel.
  • the wave peaks and the wave troughs of the fins of the corrugated sheets may be brazed, soldered, welded or glued to the surfaces of two adjacent plates.
  • a distance between walls of two adjacent fins at middle point of height of the fins are in the range of 0,25 - 10 mm, preferably in the range of 0,35 - 3 mm and most preferably in the range of 0,5 - 1 mm.
  • Such configuration of the distance between walls of two adjacent fins at middle point of height of the fins may result in a shape and size of the cross-sectional area of the individual guide channel may have a low impact on the volume flow of the heat exchange medium in the guide channel. Further, the pressure fall over the heat exchange portion may be low when the distance between walls of two adjacent fins at middle point of height of the fins is in within this ranges.
  • a number of the first and second guiding ribs may extend to a position at a distance from a respective end portion of the fins, which distance between the respective end portion of the fins and the first and second guiding ribs may be configured as a mixing zone for mixing and equalize the volume flow of the first heat exchange medium before entering the parallel guide channels created by the fins, and for mixing and equalize the volume flow of the second heat exchange medium before entering the parallel guide channels created by the fins.
  • the number of guiding ribs may be different from the number of fins.
  • the number of fins may be larger than the number of guiding ribs.
  • the space between the ribs leave flow passages, which define guide passages for the heat exchanging media, which guide passages may be wider and larger than the guide channels between the fins.
  • Arranging the end portion of the guiding ribs at a distance from the end portion of the fins avoid the end portion of the guiding ribs to block the guiding channels created by the fins. Further, this design creates the mixing zone between the ribs and fins, such that the fluid can be redistributed evenly over the fin channels.
  • a number of the first and second guiding ribs may extend into the mixing zone and abut against the respective end portion of the fins for positioning and guidance of the corrugated sheet metal of fins in the heat exchange portion of the flow passages.
  • the end portion of a number of guiding ribs may abut against the respective end portion of the fins for positioning and guidance of the corrugated sheet metal of fins.
  • the guiding ribs may thus be configured to guide and positioning the corrugated sheet metal of fins within the heat exchanger plate.
  • the corrugated sheet metal of fins may be a separate part from the heat exchanger plate, which may be positioned between the port portions, which are provided with the guiding ribs.
  • the corrugated sheet metal of fins may first be positioned between the port portions and guided to a correct position by the end portions of the guiding ribs, which extend into the mixing zone. Thereafter the corrugated sheet metal of fins is firmly connected to the heat exchanger plate by for example brazing, soldering, welding or gluing.
  • the plate heat exchanger provided with the above-mentioned guiding ribs, which extend into the mixing zone and abut against the respective end portion of the fins will positioning the corrugated sheet metal of fins correctly and thus increase the heat exchange performance of the plate heat exchanger.
  • the guiding ribs, which abut against the respective end portion of the fins, may block some of the guiding channels created by the fins.
  • the majority of the guiding channels may not be blocked by guiding ribs. Instead, the volume flow of the heat exchange media may be mixed and equalized in the mixing zone before entering the parallel guide channels created by the fins.
  • a part of the ribs, along the length of the ribs, which extend into the mixing zone and abut the fins may have a reduced height. The reduced height may connect the mixing zones, so that the heat exchange medium can flow over and pass the ribs with reduced height. This configuration of the end portion of the ribs, may not block some of the guiding channels created by the fins.
  • the outermost guiding ribs of the first and second guiding ribs may extend into the mixing zone and abut against the respective end portion of the fins, for preventing the first and second heat exchange medium, respective, to flow in a bypass channel formed between the peripheral portion of the heat exchanger plate and the outermost fins in the heat exchange portion. Since the corrugated sheet metal of fins in the heat exchange portion may have a smaller width, than the width of the heat exchanger plate, bypass channels without fins may occur between the outermost fins and the peripheral side portion of the heat exchanger plate. An uneven distribution of the heat exchange medium in the heat transfer portion may decrease the heat transfer performance of the plate heat exchanger.
  • the uneven distribution of heat exchange medium may depend on how the ribs and guiding channels of the fins mesh with the heat transfer portion. Further, any differences or irregularities such as a bypass channel in the heat exchange portion may affect the heat transfer performance due to uneven distribution of the heat exchange medium in the heat transfer portion.
  • the outermost guiding ribs abutting against the respective end portion of the outermost fins prevents the heat exchange medium to flow in the bypass channel. This will equalize the volume flow of the heat exchange medium entering the parallel guide channels created by the fins.
  • FIG. 1 schematically illustrates a plate heat exchanger 1 in a perspective view according to an example.
  • the plate heat exchanger 1 comprising a package of heat exchanger plates 2, each having a peripheral portion 4 and several port portions 6a,6b with through flow ports 8a,8b.
  • the heat exchanger plates 2 are permanently joined to adjacent heat exchanger plates 2 of the package along their peripheral portions 4 in such manner that they leave flow passages 12 ( fig. 2 ) in a heat exchange portion 14 between adjacent heat exchanger plates 2.
  • the through flow ports 8a,8b of the heat exchanger plates 2 are aligned and form first inlet and outlet channels 16a,16b through the package for a first heat exchange medium 18, which communicate with every other flow passage 12 between the heat exchanger plates 2, and second inlet and outlet channels 20a,20b through the package for a second heat exchange medium 22, which communicate with remaining flow passages 12 between the heat exchanger plates 2.
  • the port portions 6a,6b of two adjacent heat exchanger plates 2, which port portions 6a,6b surround an inlet or outlet channel 16a,16b; 20a,20b communicating with the flow passage 12 formed by the heat exchanger plates 2, are placed at the end planes 42 of the heat exchanger plates 2 located furthest from each other.
  • Fig. 2 schematically illustrates a part of the plate heat exchanger 1 in a section view along line X - X in fig. 1 according to an example.
  • the heat exchanger plates 2 are permanently joined to adjacent heat exchanger plates 2 of the package along their peripheral portions 4 in such manner that they leave flow passages 12 in a heat exchange portion 14 between adjacent heat exchanger plates 2.
  • Fins 32 are arranged in the heat exchange portion 14 of the flow passages 12 between the adjacent heat exchanger plates 2, which fins 32 creates a number of parallel guide channels 34 for each of the first and second heat exchange medium 18,22, respective.
  • the peripheral portion of the heat exchange plates are provided with a flank 23 and a brim 25.
  • Fig. 3 schematically illustrates the plate heat exchanger 1 in a section view along line V - V in fig. 1 according to an example.
  • Each connection part 28 creates according to this example a solid line around the outlet or inlet channel16b, 20a, respectively.
  • the second inlet channel 20a communicate with every other flow passage between the heat exchanger plates 2.
  • the first outlet channel 16b communicate with the remaining flow passages between the heat exchanger plates 2.
  • Fins 32 are arranged between the adjacent heat exchanger plates 2, which fins 32 creates a number of parallel guide channels 34.
  • Fig. 4 schematically illustrates the plate heat exchanger 1 in a section view along line V - V in fig. 1 according to an example.
  • the heat exchanger plates 2 are permanently joined by connection parts 28.
  • the connection parts 28 are arranged to keep the port portions 6a,6b of adjacent heat exchanger plates 2 together along the inlet and outlet channels 16b, 20a.
  • At least one connection part 28, along each of the inlet and outlet channels 16b, 20a is arranged in the plate interspaces 30, which communicate with the inlet and outlet channels 16b, 20a, respectively, and is permanently connected in each such plate interspace 30 to both of the adjacent heat exchanger plates 2.
  • Fins 32 are arranged between the adjacent heat exchanger plates 2, which fins 32 creates a number of parallel guide channels 34.
  • Fig. 5 schematically illustrates a heat exchanger plate 2 in a view from above according to an example.
  • the peripheral portion 4 encircle the entire plate 2.
  • Through flow ports 8a,8b are arranged in the heat exchanger plate 2, which together with through flow ports 8a,8b of other plates 2 are configured to form inlet and outlet channels 16a,16b; 20a,20b through a package of plates 2 ( fig 1 ).
  • First guiding ribs 50 are arranged in the port portions 6a,6b, which first guiding ribs 50 in every other flow passage 12 between the heat exchanger plates 2 are configured to guide and distribute the first heat exchange medium 18 ( fig.
  • first and second guiding ribs 50,52 constitute an integral part of a heat exchanger plate 2.
  • the first and second guiding ribs 50,52 may however be arranged in a separate sheet element 54, and the separate sheet element 54 may be arranged in the respective port portion 6a,6b.
  • the heat exchanger plates 2 are made of thin material and be provided with the first and second guiding ribs 50,52 shaped on one side, each first and second guiding rib 50,52 being shaped in the port portion 6a,6b of a heat exchanger plate 2.
  • Fig. 6 schematically illustrates in a view from above of a mixing zone 58 indicated in fig. 5 .
  • a number of the first and second guiding ribs 50,52 extend to a position at a distance from a respective end portion 56 of the fins 32, which distance between the respective end portion 56 of the fins 32 and the first and second guiding ribs 50,52 is configured as a mixing zone 58 for mixing and equalize the volume flow of the first heat exchange medium 18 ( fig. 1 ) before entering the parallel guide channels 34 created by the fins 32, and for mixing and equalize the volume flow of the second heat exchange medium 22 before entering the parallel guide channels 34 created by the fins 32.
  • a number of the first and second guiding ribs 50,52 extend into the mixing zone and abuts against the respective end portion 56 of the fins 32 for positioning and guidance of the corrugated sheet metal 38 of fins 32 in the heat exchange portion 14 of the flow passages 12.
  • the outermost guiding ribs 50a,52a of the first and second guiding ribs 50,52 extend into the mixing zone 58 and abuts against the respective end portion 56 of the fins 32, for preventing the first and second heat exchange medium 18,22 ( fig. 1 ), respective, to flow in a bypass channel 60 formed between the peripheral portion 4 of the heat exchanger plate 2 and the outermost fins 32a in the heat exchange portion 14, which is also shown in fig. 7 .
  • Figures 7 - 9 schematically illustrate examples of a part of the plate heat exchanger 1 in a section view along line Z - Z in fig. 5 .
  • the height rh1 of the first and second guiding ribs 50,52 corresponds to the distance d between two adjacent heat exchanger plates 2 in the port portions 6a,6b ( fig, 5 ), respective.
  • the ribs 50,52 which extend into the mixing zone 58 and abut the fins 32 may have a reduced height rh2.
  • the reduced height rh2 may connect the mixing zones 58, so that the heat exchange medium 18,22 can flow over and pass the ribs 50,52 with reduced height rh2.
  • Fins 32 are arranged in the heat exchange portion 14 of the flow passages 12 between the adjacent heat exchanger plates 2, which fins 32 creates a number of parallel guide channels 34 for each of the first and second heat exchange medium 18,22, respective.
  • Each parallel guide channel 32 is delimited by walls 36 of the fins 32 and a heat exchanger plate 2.
  • the fins 32 are created by a corrugated sheet metal 38, which has wave peaks p1 ,p2 and wave troughs t1,t2.
  • the wave height wh of the fins 32 of the corrugated sheet metal 38 corresponds to the distance d between two adjacent heat exchanger plates 2 in the heat exchange portion 14.
  • the first and second guiding ribs 50,52 are arranged in a separate sheet element 54, which is arranged between the plates 2.
  • the first and second guiding ribs 50,52 are shaped from the heat exchange plate 2 by a suitable manufacturing method.
  • the fins 32 have a different shape comparing to the shape of the fins 32 in fig. 7 .
  • the width wr of a rib is larger than the width wd between the walls 36 of two fins 32 at a middle point of height MH of a wave height wh of the fins 32. In fig.
  • the outermost guiding ribs 50a,52a of the first and second guiding ribs 50,52 extend into the mixing zone 58 and abuts against the respective end portion 56 of the fins 32, for preventing the first and second heat exchange medium 18,22, respective, to flow in a bypass channel 60 formed between the peripheral portion 4 of the heat exchanger plate 2 and the outermost fins 32a in the heat exchange portion 14.
  • the outermost guiding ribs 50a,52a are shaped in the plate 2 and in a part of the flank 23 of the plate 2.
EP22196564.3A 2022-09-20 2022-09-20 Plattenwärmetauscher Pending EP4343257A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22196564.3A EP4343257A1 (de) 2022-09-20 2022-09-20 Plattenwärmetauscher
PCT/EP2023/075639 WO2024061823A1 (en) 2022-09-20 2023-09-18 A plate heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22196564.3A EP4343257A1 (de) 2022-09-20 2022-09-20 Plattenwärmetauscher

Publications (1)

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EP4343257A1 true EP4343257A1 (de) 2024-03-27

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EP (1) EP4343257A1 (de)
WO (1) WO2024061823A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781248A (en) * 1986-07-03 1988-11-01 W. Schmidt Gmbh & Co., K.G. Plate heat exchanger
US20080236802A1 (en) * 2006-10-12 2008-10-02 Andreas Koepke Plate heat exchanger
US20100175858A1 (en) * 2007-06-12 2010-07-15 Zhixian Miao Plate-fin type heat exchanger without sealing strip
WO2013144211A1 (en) 2012-03-28 2013-10-03 Alfa Laval Corporate Ab Method for joining metal parts
KR20180028704A (ko) 2016-09-09 2018-03-19 주식회사 동화엔텍 판형 열교환기 및 그 제조방법
EP3546257A1 (de) * 2018-03-29 2019-10-02 DENSO THERMAL SYSTEMS S.p.A. Klimatisierungssystem für busse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4781248A (en) * 1986-07-03 1988-11-01 W. Schmidt Gmbh & Co., K.G. Plate heat exchanger
US20080236802A1 (en) * 2006-10-12 2008-10-02 Andreas Koepke Plate heat exchanger
US20100175858A1 (en) * 2007-06-12 2010-07-15 Zhixian Miao Plate-fin type heat exchanger without sealing strip
WO2013144211A1 (en) 2012-03-28 2013-10-03 Alfa Laval Corporate Ab Method for joining metal parts
KR20180028704A (ko) 2016-09-09 2018-03-19 주식회사 동화엔텍 판형 열교환기 및 그 제조방법
EP3546257A1 (de) * 2018-03-29 2019-10-02 DENSO THERMAL SYSTEMS S.p.A. Klimatisierungssystem für busse

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