WO2024115433A1 - Échangeur de chaleur à plaques - Google Patents

Échangeur de chaleur à plaques Download PDF

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Publication number
WO2024115433A1
WO2024115433A1 PCT/EP2023/083260 EP2023083260W WO2024115433A1 WO 2024115433 A1 WO2024115433 A1 WO 2024115433A1 EP 2023083260 W EP2023083260 W EP 2023083260W WO 2024115433 A1 WO2024115433 A1 WO 2024115433A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
plate portion
plate
port hole
hole channel
Prior art date
Application number
PCT/EP2023/083260
Other languages
English (en)
Inventor
Christer MILLRUD
David SÁNCHEZ MOLINERO
Jörgen GUSTAFSSON
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
Priority claimed from DE202022106757.0U external-priority patent/DE202022106757U1/de
Priority claimed from CN202223218050.6U external-priority patent/CN219415841U/zh
Application filed by Alfa Laval Corporate Ab filed Critical Alfa Laval Corporate Ab
Publication of WO2024115433A1 publication Critical patent/WO2024115433A1/fr

Links

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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/086—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning having one or more openings therein forming tubular heat-exchange passages
    • 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
    • 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
    • F28F9/0263—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry or cross-section of header box
    • 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
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes

Definitions

  • the invention relates to the field of heat exchangers. More particularly, it is related to a plate heat exchanger.
  • the plate heat exchanger has first heat exchanger plates and second heat exchanger plates forming first plate interspaces configured to receive a first fluid and second plate interspaces configured to receive a second fluid.
  • the first heat exchanger plates and the second heat exchanger plates are stacked onto one another.
  • Plate heat exchangers are used in numerous applications where heat is to be transferred from one fluid to another or vice versa.
  • a typical plate heat exchanger includes a plate package formed of stacked heat exchanger plates. Generally, a number of first heat exchanger plates and a number of second heat exchanger plates are stacked in an alternating fashion and joined to each other. In this way a first plate interspace is formed between each pair of adjacent first heat exchanger plates and second heat exchanger plates and a second plate interspace between each pair of adjacent second heat exchanger plates and first heat exchanger plates.
  • the first plate interspaces and the second plate interspaces are typically separated from each other and are designed to receive a respective fluid between which fluids heat is to be exchanged.
  • respective inlet and outlet ports are typically provided to the first plate interspaces and to the second plate interspaces.
  • An evaporator is generally a plate heat exchanger designed for evaporation of a fluid in a refrigeration system.
  • a refrigeration system may by way of example be an air conditioning system, a cooling system, a heat pump system or similar.
  • a refrigeration system comprises, in addition to an evaporator, a compressor, a condenser and an expansion valve, all of which are coupled in series.
  • the evaporator Since a fluid, such as a refrigerant supplied to an inlet channel of such an evaporator, is normally present both in a gaseous state and a liquid state, the evaporator is also commonly referred to as a two-phase evaporator.
  • the fluid supplied to the inlet channel of the evaporator is generally provided in two states of aggregation simultaneously, namely liquid and vapor.
  • fluid is supplied both in a gaseous state and a liquid state it is difficult to provide an even or optimal distribution of the fluid to the different plate interspaces.
  • One reason for this can be that the fluid, after having passed through the expansion valve, is already partly evaporated when it enters the inlet channel of the evaporator.
  • restriction parts or restriction openings in conjunction to each passage between the inlet channel of the plate heat exchanger and its associated plate interspace forming an evaporation flow path for the fluid.
  • the provision of restriction parts has proven troublesome when it comes to manufacturing, mainly because such parts must be correctly placed and fixed in each relevant place interspace.
  • Provision of restriction openings is generally more favorable from a manufacturing perspective but tends to suffer from other drawbacks.
  • Another object is to provide such a plate heat exchanger in which a fluid is distributed more evenly throughout the plate interspaces of the plate heat exchanger.
  • Another object is to provide such a plate heat exchanger which has an improved overall performance. Another object is to provide such a plate heat exchanger which is capable of handling higher fluid speeds to satisfaction.
  • Another object is to provide such a plate heat exchanger which enables an improved mixing of fluid in a liquid phase and fluid in gaseous phase.
  • Another object is to provide such a plate heat exchanger which is less prone to cracking.
  • Another object is to provide such a plate heat exchanger which is easier to manufacture.
  • Another object is to provide such a plate heat exchanger which is more cost- effective.
  • a plate heat exchanger having the features defined in claim 1 is provided according to the present inventive concept.
  • a plate heat exchanger comprising: first heat exchanger plates and second heat exchanger plates forming first plate interspaces configured to receive a first fluid and second plate interspaces configured to receive a second fluid, wherein the first heat exchanger plates and the second heat exchanger plates are vertically stacked onto one another in a vertical direction and extending in parallel with a horizontal extension plane, wherein each first and second exchanger plate comprises a porthole extending therethrough, such that a port hole channel is formed in the vertical direction through the first heat exchanger plates and the second heat exchanger plates via the portholes, wherein a first heat exchanger plate and a second heat exchanger plate are joined in a fluid thigh manner via a first joining area circumscribing the port hole channel at a first radial distance from a center of the port hole channel thereby forming a first peripheral plate portion of the first heat exchanger plate extending between the first joining area and the port hole channel, and a second peripheral plate portion of the second heat exchanger
  • the present invention is based on the realization that by forming a restricted volume in fluid communication with the port hole channel, an improved mixing of fluid entering the port hole channel may be achieved prior to feeding the fluid to a plate interspace.
  • a restricted volume in fluid communication with the port hole channel may be formed between the first peripheral plate portion and the second peripheral plate portion between the first radial distance and the second radial distance.
  • the fluid entering the port hole channel may be more evenly distributed throughout the plate heat exchanger.
  • the fluid may be more evenly distributed in the vertical direction as well as along the horizontal extension plane.
  • the fluid may be more evenly distributed between the respective relevant plate interspaces as well as more evenly distributed within said relevant plate interspaces.
  • plates of the plate heat exchanger may be less prone to cracking or otherwise being damaged.
  • the plate heat exchanger may be capable of handling high fluid speeds enabling a high degree of mixing.
  • first peripheral plate portion of the first heat exchanger plate is formed and a second peripheral plate portion of the second heat exchanger plate is formed.
  • peripheral plate portion such as the first peripheral plate portion and the second peripheral plate portion, may mean any portion of any heat exchanger plate which is located between the first sealing area and the port hole channel, including any portion of any heat exchanger plate at least partially defining a port hole channel.
  • peripheral plate portion may have any shape and may include a plurality of sections or subsections extending in different directions or orientations.
  • such peripheral plate portion may be formed to provide a desired functionality such as forming the restricted volume between the first peripheral plate portion and the second peripheral plate portion between the first radial distance and the second radial distance.
  • such peripheral plate portion may be formed to provide a desired functionality or shape of the port hole channel.
  • the first peripheral plate portion extends between the first joining area and the port hole channel.
  • the second peripheral plate portion of the second heat exchanger plate extends between the first joining area and the port hole channel.
  • the first peripheral plate portion and the second peripheral plate portion circumscribing the port hole channel.
  • the first peripheral plate portion and the second peripheral plate portion and at least partially extending at a distance from each other in the horizontal direction such that a space, like the restricted volume, or more than one space is formed between the first peripheral plate portion and the second peripheral plate portion.
  • a first section of the first peripheral plate portion extends towards the second peripheral plate portion and/or a first section of the second peripheral plate portion extends towards the first peripheral plate portion at a second radial distance from the center of the port hole channel thereby forming the restricted volume.
  • section such as the first second of the first peripheral plate portion and the second section of the second peripheral plate portion, may mean any section, part or subset of its associated peripheral plate portion. In other words, a section forms part of a peripheral plate portion.
  • a peripheral plate portion may be said to be formed of a plurality of sections.
  • restricted volume may mean any volume or space which has a principal cross-sectional area that is larger than a cross-sectional area of an opening, slit or similar through which the restricted volume is accessible. Hence, the restricted volume is accessible through one or more narrowings, like an opening, a passage, a slit, or similar.
  • a first opening may be provided between the restricted volume and a first plate interspace, which is advantageous in that fluid may be fed via the restricted volume to the first plate interspace.
  • fluid may be fed via the restricted volume to the first plate interspace.
  • the first section of the first peripheral plate portion and the first section of the second peripheral plate portion may meet and be joined in a fluid tight manner at the second radial distance via a second joining area, the second joining area comprising a discontinuance forming a second opening between the port hole channel and the restricted volume thereby providing for said fluid communication, which is advantageous in that distribution and/or mixing of liquid and vapor may be further improved.
  • the fluid communication between the port hole channel and the restricted volume may be controlled by tailoring the second opening. Hence, fluid including both liquid and vapor may be fed to the restricted volume via the second opening while being distributed and/or mixed more efficiently.
  • the second opening may be formed by a notch in the first peripheral plate portion at the second joining area and/or in the second peripheral plate portion at the second joining area, which is advantageous in that the second opening may be provided in an efficient manner while forming the first and/or the second heat exchanger plates.
  • the second opening may be formed by e.g. pressing a notch at a location where the second joining area is to be formed while forming the first and/or the second heat exchanger plates.
  • a circumferential extension of the restricted volume may be delimited by a pair of protrusions provided in the first peripheral plate portion and/or in the second peripheral plate portion, the protrusions extending radially between the first joining area and the second joining area, which is advantageous in that mixing of liquid and vapor may be further improved.
  • pressure may build up quicker in the restricted volume and thereby promote a more efficient distribution and/or mixing of liquid and vapor.
  • a pair of protrusions such delimiting may be provided in an efficient manner while forming the first and/or the second heat exchanger plates.
  • the first peripheral plate portion may further comprise a first end section at least partially defining the port hole channel and extending substantially along the vertical direction, which is advantageous in that the interior of the port hole channel may at least partially be shaped by the first end section.
  • the interior of the port hole channel may be made smooth or flat or less irregular which promotes an even distribution of liquid and vapor in the port hole channel.
  • the second peripheral plate portion may further comprise a second end section at least partially defining the port hole channel and extending substantially along a direction opposite to the vertical direction, which is advantageous in that the interior of the port hole channel may at least partially be shaped by the second end section.
  • the interior of the port hole channel may be made smooth or flat or less irregular which promotes an even distribution of liquid and vapor in the port hole channel.
  • a vertical extension of the first end section may be equal to a vertical extension of the second end section, or the vertical extension of the first end section may be smaller than the vertical extension of the second end section.
  • a smooth or flat or less irregular port hole channel may be achieved.
  • a port hole channel which promotes a flow of fluid in one direction, i.e. opposite to the vertical direction, with a reduced flow resistance and/or undesired turbulence may be achieved.
  • the first end section and second end section may be provided at a same radial distance from the center the port hole channel, or the first end section may be provided at a larger radial distance from the center of the port hole channel than the second end section.
  • the interior of the port hole channel may be made smooth or flat or less irregular which promotes an even distribution of liquid and vapor in the port hole channel.
  • the second end section may overlap the first end section as seen from the port hole channel. Hence, the second end section may be located closer to the center of the port hole channel as compared to the first end section. in this way, a port hole channel which promotes a flow of fluid in one direction, i.e. opposite to the vertical direction, with a reduced flow resistance and/or undesired turbulence may be achieved.
  • the port hole channel may have a diameter of 3-50 mm, preferably, 4-30 mm, more preferably 5-24 mm.
  • the first opening may have a cross sectional area of 0,1 -1,0 mm 2 , preferably 0,25-0,55 mm 2 , more preferably 0,35-0, 45mm 2 , which is advantageous in that a desired mixing and flow resistance may be achieved.
  • the flow speed of the fluid through the first opening may be increased. Such increased flow speed may improve mixing of liquid and vapor of the fluid.
  • the second opening may have a cross sectional area of 1-15 mm 2 , preferably 1 ,5-10 mm 2 , more preferably 2-5 mm 2 , which is advantageous in that the second opening may provide for an efficient distribution and/or mixing of liquid and vapor of the fluid while still promoting an efficient flow of fluid via the restricted volume. Hence, the pressure drop over the second opening may be reduced or at least acceptable by the above cross sectional area of the second opening.
  • the first joining area may be formed by a joining a first horizontal section of the first peripheral plate portion with a first horizontal section of the second peripheral plate portion, which is advantageous in that brazing or welding of the plate heat exchanger may be facilitated.
  • solder or braze material may be screen-printed on the first horizontal sections prior to brazing the plate heat exchanger. Hence, fabrication of the plate heat exchanger may be facilitated.
  • the second joining area may be formed by a joining a second horizontal section of the first peripheral plate portion with a second horizontal section of the second peripheral plate portion which is advantageous in that brazing or welding of the plate heat exchanger may be facilitated.
  • solder or braze material may be screen- printed on the second horizontal sections prior to brazing the plate heat exchanger. Hence, fabrication of the plate heat exchanger may be facilitated.
  • a further first opening may be provided between the restricted volume and the first plate interspace and/or a further second opening may be provided between the port hole channel and the restricted volume.
  • the further first opening and the further second opening may extend along a same radial direction of the port hole channel.
  • the first opening and the further first opening may extend along different radial directions of the port hole channel.
  • the different radial directions of the first opening and the further first opening may be separated by an angle of 10-180 degrees.
  • the different radial directions of the first opening and the further first opening may be separated by an angle of 30-120 degrees.
  • the first opening and the further first opening may extend along the same radial direction of the port hole channel.
  • the second opening and the further second opening may extend along different radial directions of the port hole channel.
  • the different radial directions of the second opening and the further second opening may be separated by an angle of 10-180 degrees.
  • the different radial directions of the second opening and the further second opening may be separated by an angle of 30-120 degrees.
  • the second opening and the further second opening may extend along the same radial direction of the port hole channel.
  • Fig. 1A is a schematic exemplary side view of a plate heat exchanger.
  • Fig. 1B is an exemplary schematic cross sectional top view of the plate heat exchanger of Fig. 1A.
  • Fig. 2 is an exemplary partial perspective view of a corner region of plate heat exchanger illustrating a stack of heat exchanger plates and a port hole channel.
  • Fig. 3A is an exemplary partial cross sectional perspective view illustrating a cross section through a port hole channel region of a heat plate heat exchanger according to an embodiment.
  • Fig. 3B is an exemplary elevated partial perspective view illustrating a port hole channel region of the heat plate heat exchanger of Fig 3A.
  • Fig. 3C is an enlarged partial view of Fig. 3A.
  • Fig. 4 is an exemplary elevated partial perspective view illustrating a port hole channel region of a heat plate heat exchanger according to an embodiment.
  • Fig. 5 is an exemplary partial cross sectional perspective view illustrating a cross section through a port hole channel region of a heat plate heat exchanger according to an embodiment.
  • Fig. 6 is an exemplary partial cross sectional perspective view illustrating a cross section through a port hole channel region of a heat plate heat exchanger according to an embodiment.
  • Fig. 7 is an exemplary partial cross sectional perspective view illustrating a cross section through a port hole channel region of a heat plate heat exchanger according to an embodiment.
  • Fig. 8 is an exemplary partial cross sectional perspective view illustrating a cross section through a port hole channel region of a heat plate heat exchanger according to an embodiment.
  • Example embodiments of a plate heat exchanger 10 will in the below be described with reference to the drawings.
  • the drawings are only schematic and the relative dimensions of some structures and layers may be exaggerated and not drawn to scale. Rather the dimensions may be adapted for illustrational clarity and to facilitate understanding.
  • the indicated axes H and V consistently refer to a horizontal or lateral direction H of the plate heat exchanger 10 and vertical direction V of the plate heat exchanger 10.
  • the term “horizontal” direction H refers to any directions parallel to an extension plane P of the heat exchanger plates of the plate heat exchanger 10.
  • vertical direction V refers to a direction parallel to a normal direction of the extension plane P of the heat exchanger plates of the plate heat exchanger 10.
  • the (positive) vertical direction refers to a direction which points out of what typically is regarded a lower end plate of the plate heat exchanger 10. This means that fluid entering and exiting the plate heat exchanger 10 through ports thereof, in the depicted embodiments enters and exits the plate heat exchanger 10 in negative vertical direction, i.e. , a direction which is opposite to the vertical direction. However, according to embodiments, fluid may enter or exit the plate heat exchanger 10 in the positive vertical direction and/or in the negative vertical direction.
  • Fig. 1A and 1 B schematically illustrate by way of example an exemplary plate heat exchanger 10.
  • the plate heat exchanger 10 includes a plate package, which is formed by a number of heat exchanger plates 100, 200.
  • the heat exchanger plates 100, 200 are typically formed from sheet metal which is cut to size and pressed to the shape of the heat exchanger plates 100, 200.
  • the heat exchanger plates 100, 200 are stacked on top of each other in a stacking direction. In the depicted plate heat exchanger 10, the heat exchanger plates are stacked in the vertical direction V.
  • the plate heat exchanger 10 comprises two different types of heat exchanger plates, which in the following are referred to as first heat exchanger plates 100, and the second heat exchanger plate 200.
  • the plate package includes substantially the same number of first heat exchanger plates 100 and second heat exchanger plates 200.
  • the heat exchanger plates 100, 200 are provided on top of each other in such a way that a first plate interspace 11 is formed between each pair of adjacent first heat exchanger plates 100 and second heat exchanger plates 200, and a second plate interspace I2 between each pair of adjacent second heat exchanger plates 200 and first heat exchanger plates 100.
  • Every second plate interspace thus forms a respective first plate interspace 11 and the remaining plate interspaces form a respective second plate interspace I2, i.e., the first and second plate interspaces 11 , I2 are provided in an alternating order in the plate package of the plate heat exchanger 10. Furthermore, the first and second plate interspaces 11, I2 are separated from each other. The first plate interspaces 11 are configured to receive a first fluid and second plate interspaces I2 configured to receive a second fluid.
  • the plate heat exchanger 10 may advantageously be configured to operate as an evaporator in a cooling agent circuit, not disclosed.
  • the first plate interspaces 11 may form first passages for the first fluid being a refrigerant whereas the second plate interspaces I2 may form second passages for a second fluid, which is to be cooled by the first fluid.
  • the plate heat exchanger 10 may also be reversed, and is then configured to be operated as a condenser, wherein the first fluid, i.e. the refrigerant, is condensed in the first plate interspaces 11 , and the second fluid is conveyed through the second plate interspaces I2 for cooling the first fluid conveyed through the first plate interspaces 11.
  • the depicted plate heat exchanger 10 of Fig. 1A and 1 B is provided with an upper end plate 11 and a lower end plate 12, which are provided on a respective side of the plate package of the plate heat exchanger 10.
  • the heat exchanger plates 100, 200 and the end plates 6, 7 are permanently joined to each other.
  • a permanent joining may advantageously be performed through brazing, welding, use of an adhesive or bonding.
  • a suitable number of heat exchanger plates are typically stacked on top each other with a solder or braze material, such as copper or a copper alloy, located between adjacent heat exchanger plates 100, 200, at desired locations.
  • the first and second heat exchanger plates 100, 200 may to advantage be made of a metal or a metal alloy, such as stainless steel, which extends to the outer surface of the heat exchanger plates 100, 200.
  • the outer surface of the metal or metal alloy typically has such properties that it adheres to the solder or braze material during the brazing of the plate heat exchanger 10. During such brazing the whole plate package of the plate heat exchanger 10 is heated in an oven until said solder or braze material melts. This will result in a permanent joint between the heat exchanger plates 100, 200 of the plate heat exchanger 10.
  • each heat first and second exchanger plates 100, 200 has four portholes 153.
  • First portholes 150 form a port hole channel 152 in form of a first inlet channel 152 to the first plate interspaces 11.
  • the port hole channel 152 is illustrated in greater detail in Fig. 2 to which reference is also made.
  • the first plate interspaces 11 are configured to receive the first fluid entering the first plate interspaces 11 via the port hole channel 153 as is known in the art.
  • the port hole channel 152 extends through substantially the whole plate package of the plate heat exchanger 10. That is, the port hole channel 152 typically extends through all the first and second heat exchanger plates 100, 200 and through the upper end plate 11.
  • port hole channels are formed by the other portholes 153, of which one port hole channel is an outlet channel for the fist fluid.
  • Another one port hole channel is an inlet channel to the second plate interspaces I2.
  • the second plate interspaces I2 are configured to receive a second fluid entering the second plate interspaces I2 via its associated port hole channel as is known in the art.
  • the final port hole channel is an outlet channel for the second fluid.
  • the four portholes 153 are in the depicted embodiment of Figs. 1A, 1B and 2 provided in the proximity of a respective corner of the substantially rectangular heat exchanger plates 100, 200. It is, however, to be understood that other positions are possible.
  • Fig. 2 schematically illustrates a perspective view of a corner region of a plate heat exchanger 10 like the plate heat exchanger 10 of Fig. 1A and 1B, with a port hole channel 152 extending through the heat exchanger plates 100, 200.
  • the port hole channel 152 is thus formed in the vertical direction V through the first heat exchanger plates 100 and the second heat exchanger plates 200 via the portholes 150.
  • the port hole channel 152 may have a diameter of 3-50 mm. However, the diameter may preferably be, 4-30 mm, more preferably be 5-24 mm.
  • each heat exchanger plate 100, 200 there is an active heat transfer area 180, which is provided with a corrugation 190 of ridges and valleys in a manner known per se.
  • the heat transfer area 180 may of course have other kinds of patterns or even no pattern at all.
  • FIGs. 3A, 3B and 3C here is conceptually depicted how the first heat exchanger plates 100 and the second heat exchanger plates 200 are shaped in proximity to the port hole channel 152 and how the port hole channel 152 is formed by the first heat exchanger plates 100 and the second heat exchanger plates 200.
  • a major portion of the first heat exchanger plates 100 and the second heat exchanger plates 200 are not shown to more clearly illustrate how the respective heat exchanger plates 100, 200 are formed in proximity to the port hole channel 152.
  • Fig. 3A is a cross sectional view to through the port hole channel 152 over ten heat exchanger plates 100, 200.
  • Fig. 3B illustrates a perspective view of Fig.
  • FIG. 3A illustrates an enlarged view of a portion of Fig. 3A.
  • a relation between a first heat exchanger plate 100 and a second heat exchanger plate 200 will be described in greater detail. It is however to be understood that the description of the first heat exchanger plate 100 and the second heat exchanger plate 200 is equally valid for any first heat exchanger plate 100 and any adjacent second heat exchanger plate 200 of the plate heat exchanger 10.
  • a first heat exchanger plate 100 and a second heat exchanger plate 200 are joined via a first joining area A1.
  • the first heat exchanger plate 100 and the second heat exchanger plate 200 are joined in a fluid tight manner via the first joining area A1.
  • the first heat exchanger plate 100 and the second heat exchanger plate 200 may be joined in a fluid tight manner via the first joining area A1 by being brazed to each other.
  • the first joining area A1 may be formed by joining a first horizontal section 108 of the first peripheral plate portion 102 with a first horizontal section 208 of the second peripheral plate portion 202.
  • solder or braze material may be to advantage be applied by screen printing solder or braze material onto the first horizontal section 108 of the first peripheral plate portion 102 and/or onto the first horizontal section 208 of the second peripheral plate portion 202. In this way, the accuracy and overall quality of the brazing may be enhanced.
  • the first joining area A1 circumscribes the port hole channel 152 at a first radial distance R1 from a center C of the port hole channel 152.
  • a first peripheral plate portion 102 of the first heat exchanger plate 100 is formed.
  • the first peripheral plate portion 102 extends between the first joining area A1 and the port hole channel 152.
  • a second peripheral plate portion 202 of the second heat exchanger plate 200 is formed.
  • the second peripheral plate portion 202 extending between the first joining area A1 and the port hole channel 152.
  • the first peripheral plate portion 102 and the second peripheral plate portion 202 circumscribes the port hole channel 152.
  • the first peripheral plate portion 102 is the portion of the first heat exchanger plate 100 which is located between the first joining area A1 and the port hole channel 152.
  • the second peripheral plate portion 202 is the portion of the second heat exchanger plate 200 which is located between the first joining area A1 and the port hole channel 152.
  • the first peripheral plate portion 102 and the second peripheral plate portion 202 generally, at least partly defines, the port hole channel 152.
  • the first peripheral plate portion 102 and the second peripheral plate portion 202 must not take part in defining the port hole channel 152.
  • the first peripheral plate portion 102 and the second peripheral plate portion 202 are at least partially extending at a distance from each other in the horizontal direction H.
  • the first peripheral plate portion 102 and the second peripheral plate portion 202 are shaped differently such that first peripheral plate portion 102 and the second peripheral plate portion 202 do not contact each other all the way between the first joining area A1 and the port hole channel 152.
  • a first section 104 of the first peripheral plate portion 102 extends towards the second peripheral plate portion 202 in the depicted plate heat exchanger 10.
  • a first section 204 of the second peripheral plate portion 202 extends towards the first peripheral plate portion 102 in the depicted plate heat exchanger 10.
  • the first section 104 of the first peripheral plate portion 102 forms part of the first peripheral plate portion 102.
  • the first section 204 of the second peripheral plate portion 202 forms part of the second peripheral plate portion 202.
  • the first section 104 of the first peripheral plate portion 102 extends towards the second peripheral plate portion 202 and the first section 204 of the second peripheral plate portion 202 extends towards the first peripheral plate portion 102 at a second radial distance R2 from the center C of the port hole channel 152.
  • a restricted volume V1 is formed between the first peripheral plate portion 102 and the second peripheral plate portion 202.
  • the restricted volume V1 is hence located between the first radial distance R1 and the second radial distance R2, as illustrated in Figs. 3A, 3B and 3C.
  • the restricted volume V1 being in fluid communication with the port hole channel 152.
  • the restricted volume V1 of as illustrated in Figs. 3A, 3B and 3C extends peripherally around the port hole channel 152 and has a general donut shape.
  • a first opening 01 may be provided between the restricted volume V1 and a first plate interspace 11. More than one first opening 01 may be provided between the restricted volume V1 and a first plate interspace 11. In the depicted embodiment of Figs. 3A, 3B and 3C, two first openings 01 are provided between the restricted volume V1 and a first plate interspace 11. Such first opening 01 is generally referred to as a restriction hole 01 and is thus formed to provide the first fluid to the fist plate interspaces 11. Any suitable number of first openings 01 may be used to advantage, such as 2, 3, 4, 5, 6, 7, 8, 9 or 10 first openings 01.
  • the first opening or openings 01 may according to an embodiment have a cross sectional area of 0,1 -1,0 mm 2 .
  • the cross-sectional area may according to an embodiment preferably be 0,25-0,55 mm 2 , more preferably be 0,35-0, 45mm 2 .
  • the first opening may in this regard be a circular hole provided in the second peripheral plate portion 202 as illustrated in Figs. 3A, 3B and 30.
  • the first opening 01 may have any suitable shape other than the circular shape.
  • the first opening 01 may be oblong, oval or elliptic.
  • the first section 104 of the first peripheral plate portion 102 and the first section 204 of the second peripheral plate portion 202 meets and are joined in a fluid tight manner at the second radial distance R2.
  • the first section 104 of the first peripheral plate portion 102 and the first section 204 of the second peripheral plate portion 202 are joined via a second joining area A2 which is located at the second radial distance R2.
  • the second joining area A2 is located closer to the center of the port hole channel 152 than the first joining area A1.
  • the second joining area A2 may be formed by joining a second horizontal section 110 of the first peripheral plate portion 102 with a second horizontal section 210 of the second peripheral plate portion 202.
  • solder or braze material may be to advantage be applied by screen printing solder or braze material onto the second horizontal section 110 of the first peripheral plate portion 102 and/or onto the second horizontal section 210 of the second peripheral plate portion 202. In this way, the accuracy and overall quality of the brazing may be enhanced.
  • the second joining area A2 may comprise a discontinuance 02 providing for said fluid communication between the port hole channel 152 and the restricted volume V1.
  • the discontinuance 02 may form a second opening 02 between the port hole channel 152 and the restricted volume V1 thereby providing for the fluid communication.
  • the second joining area A2 comprises two discontinuances 02.
  • the two discontinuances 02 forming a respective second opening 02 between the port hole channel 152 and the restricted volume V1.
  • a first opening 01 and a second opening 02 extend along a common radial direction whereas the other first opening 01 and a the other second opening 02 extend along a different common radial direction.
  • a first opening 01 and a second opening 02 may extend different radial directions.
  • any suitable number of second openings 02 may be used to advantage, such as 2, 3, 4, 5, 6, 7, 8, 9 or 10 second openings 02.
  • the second opening or openings 02 may be formed by a notch N in the first peripheral plate portion 102 at the second joining area A2.
  • the second opening or openings 02 may formed by a notch N in the first peripheral plate portion 102 at the second joining area A2.
  • the second opening or openings 02 may be formed by a notch N in the first peripheral plate portion 102 at the second joining area A2 and/or in the second peripheral plate portion 202 at the second joining area A2.
  • the second openings 02 are formed by notches N, N pressed in the first heat exchanger plate 100 and in the second heat exchanger plate 200 respectively.
  • Such notches N, N may to advantage be formed when forming the heat exchanger plates 100, 200.
  • the second opening 02 may according to an embodiment have a cross sectional area of 1-15 mm 2 .
  • the cross-sectional area may according to an embodiment preferably be 1 ,5-10 mm 2 , more preferably 2-5 mm 2 .
  • the cross-sectional area of the second opening 02 may be larger than the cross-sectional area of the first opening 01.
  • the cross-sectional area of the second opening 02 may be about 10-15 times larger than the cross-sectional area of the first opening 01.
  • the cross-sectional area of the second opening 02 being larger than the cross-sectional area of the first opening 01 , an efficient distribution and/or mixing of liquid and vapor of the first fluid may be achieved with a limited or no pressure drop as compared to prior art solutions where a restriction hole is provided directly from a port hole channel to e.g., a first plate interspace.
  • the first peripheral plate portion 102 further comprises a first end section 106.
  • the first peripheral plate portion 102 is thus partially formed of the first end section 106.
  • the first end section 106 is partially defining the port hole channel 152.
  • the first end section 106 extends substantially along the vertical direction V.
  • a major portion of the first end section 106 is aligned with and extends along the extension of the port hole channel 152.
  • the second peripheral plate portion 202 further comprises a second end section 206.
  • the second peripheral plate portion 202 is thus partially formed of the second end section 206.
  • the second end section 206 is partially defining the port hole channel 152.
  • the second end section 206 extends substantially in a direction opposite to the vertical direction V.
  • a major portion of the second end section 206 is aligned with and extends along the extension of the port hole channel 152.
  • the first end section 106 and the second end section 206 are typically formed by being pressed when forming the first and second heat exchanger plates 100, 200.
  • the first end section 106 and the second end section 206 may define or form the port hole channel 152.
  • the port hole channel 152 is configured to receive the first fluid in a direction opposite to the vertical direction V. Flow of the first fluid form the port hole channel 152, into a restricted volume V1 and further into a first plate interspace 11 is schematically in indicated by a set of hatched arrows in Fig. 3A.
  • the first end section 106 and the second end section 206 may define or form dead volume V2.
  • the dead volume V2 is dead in the sense that it may only communicate with the port hole channel 152. Hence, the dead volume V2 is not connected to the first plate interspaces 11 or the second plate interspaces I2. In other words, any fluid entering into the dead volume V2 may only be fed back to the port hole channel 152.
  • the vertical extension of the first end section 106 is equal to a vertical extension of the second end section 206.
  • the first end section 106 extends a distance along the port hole channel 152 which is equal to a distance over which the second end section 206 extends along the port hole channel 152.
  • the first end section 106 extends substantially in the vertical direction V whereas the second end section 206 extends in a direction substantially opposite to the vertical direction V.
  • the vertical extension of the first end section 106 may be smaller than the vertical extension of the second end section 206 or vice versa.
  • the first end section 106 and second end section 206 are provided at the same radial distance from the center C the port hole channel 152. Hence, the outer end of the first end section 106 meets the outer end of the second end section 206 as best seen in the lower part of Fig. 3C.
  • Fig 4. Illustrates an embodiment which is similar to the embodiment described above in conjunction with Figs. 3A, 3B and 3C. Therefore, in the following, only differences in relation to the embodiment of Figs. 3A, 3B and 3C will be described to avoid undue repetition.
  • a circumferential extension of the restricted volume V1 may be delimited by a pair of protrusions P1 , P2.
  • the otherwise generally donut shaped restricted volume V1 may be restricted to only extend along a portion of the circumference of the port hole channel 152 rather than along the complete circumference of the port hole channel 152 as in Figs. 3A, 3B and 3C.
  • a pair of restricted volumes V1 are formed between a respective pair of protrusions P1 , P2.
  • Each one of the restricted volumes V1 of Figs. 4 and 2 extends along a portion of the circumference of the port hole channel 152.
  • the protrusions P1 , P2 may be provided in the first peripheral plate portion 102 and in the second peripheral plate portion 202. Alternatively, the protrusions P1, P2 may be provided in the first peripheral plate portion 102 or in the second peripheral plate portion 202. As illustrated in Figs. 4, and 2, the protrusions P1, P2 may extend radially between the first joining area A1 and the second joining area A2.
  • Fig 5. Illustrates an embodiment which is similar to the embodiment described above in conjunction with Figs. 3A, 3B and 3C. Therefore, in the following, only differences in relation to the embodiment of Figs. 3A, 3B and 3C will be described to avoid undue repetition.
  • the first end section 106 is provided at a larger radial distance from the center C of the port hole channel 152 than the second end section 206. Further, the first end section 106 and the second end section 206 overlap each other. This means that the port hole channel 152 is to a greater extent defined by the second end section 206 than the first end section 106.
  • first end section 106 and the second end section 206 allow for that the first fluid may easily flow into the port hole channel 152 in a direction opposite to the vertical direction V. This is because the first end section 106 and the second end section 206 overlap like fish scales, hence promoting a flow of the first fluid along the port hole channel in a direction opposite to the vertical direction V.
  • Protrusions P1 , P2 of the type described above in conjunction with Fig. 4 and 2 may to advantage be combined with the embodiment of Fig. 5.
  • Fig 6. Illustrates an embodiment which is similar to the embodiment described above in conjunction with Figs. 3A, 3B and 3C. Therefore, in the following, only differences in relation to the embodiment of Figs. 3A, 3B and 3C will be described to avoid undue repetition.
  • the first end section 106 and the second end section 206 are generally speaking provided at the same radial distance from the center C of the port hole channel 152 like in the embodiment of Figs. 3A, 3B and 3C.
  • the first end section 106 and the second end section 206 are extending in slightly different directions as compared to the first end section 106 and the second end section 206 of the embodiment of figs.
  • the first end section 106 and the second end section 206 has been bent slightly more such that the outer end of the first end section 106 meets the outer end of the second end section 206 at a slightly larger radial distance from the center C of the port hole channel 152 than a mean radial distance of first end section 106 and the second end section 206 the from the center C of the port hole channel 152.
  • the interior of the port hole channel 152 becomes more irregular with periodically varying diameters along its extension as compared to the port hole channel 152 of the embodiment of Figs. 3A, 3B and 3C.
  • Protrusions P1 , P2 of the type described above in conjunction with Fig. 4 and 2 may to advantage be combined with the embodiment of Fig. 6.
  • Fig 7. Illustrates an embodiment which is similar to the embodiment described above in conjunction with Figs. 3A, 3B and 3C. Therefore, in the following, only differences in relation to the embodiment of Figs. 3A, 3B and 3C will be described to avoid undue repetition.
  • the first end section 106 is omitted. This means that the first peripheral plate portion terminates at the second joining area A2 as illustrated in Fig. 7.
  • the second end section 206 on the other hand has a larger extension along the port hole channel 152 as compared to the embodiment of Figs. 3A, 3B and 3C.
  • the extension of the second end section 206 allows for that the first fluid may easily flow into the port hole channel 152 in a direction opposite to the vertical direction V. This is because the second end section 206 to some degree resembles fish scales, hence promoting a flow of the first fluid along the port hole channel in a direction opposite to the vertical direction V.
  • Protrusions P1, P2 of the type described above in conjunction with Fig. 4 and 2 may to advantage be combined with the embodiment of Fig. 7.
  • Fig 8. Illustrates an embodiment which is similar to the embodiment described above in conjunction with Figs. 3A, 3B and 3C. Therefore, in the following, only differences in relation to the embodiment of Figs. 3A, 3B and 3C will be described to avoid undue repetition.
  • the a first heat exchanger plate 100 and a second heat exchanger plate 200 are joined in a fluid thigh manner via a first joining area A1.
  • the first joining area A1 circumscribes the port hole channel 152 at a first radial distance R1 from a center C of the port hole channel 152 thereby forming a first peripheral plate portion 102 of the first heat exchanger plate 100 extending between the first joining area A1 and the port hole channel 152.
  • a second peripheral plate portion 202 of the second heat exchanger plate 200 extending between the first joining area A1 and the port hole channel 152 is formed.
  • the first peripheral plate portion 102 and the second peripheral plate portion 202 circumscribes the port hole channel 152 and are at least partially extending at a distance from each other in the horizontal direction H.
  • a first section 104 of the first peripheral plate portion 102 extends towards the second peripheral plate portion 202 at a second radial distance R2 from the center C of the port hole channel 152 thereby forming the restricted volume V1 between the first peripheral plate portion 102 and the second peripheral plate portion 202 between the first radial distance R1 and the second radial distance R2.
  • the restricted volume V1 of Fig. 8 is in fluid communication with the port hole channel 152.
  • each port hole 150 is surrounded by a peripheral inner rim 15 formed by a portion of the first section 104 of the first peripheral plate portion 102.
  • the peripheral rim 15 is annular and extends substantially transversally to the extension plane P.
  • the peripheral inner rim 15 is surrounded by a peripheral outer rim 13 formed by a portion of the second peripheral plate portion 202.
  • the peripheral outer rim 13 having a top end 16 and a root end 17.
  • the peripheral outer rim 13 has a rim height H perpendicular to the extension plane P from the root end 17 to the top end 16.
  • Substantially parallel to the outer rim 13 is the inner rim 15 arranged.
  • the inner rim 15 has a rim height h perpendicular to the extension plane P.
  • the inner rim height h is shorter than the outer rim height H, which results in an opening 14 being defined between the lower end point of the inner rim 15 and the root end 17.
  • the restricted volume V1 is formed between the first peripheral plate portion 102 and the second peripheral plate portion 202 between the first radial distance R1 and the second radial distance R2.
  • the restricted volume V1 of Fig. 8 is in fluid communication with the port hole channel 152 via the opening 14.
  • the opening 14 of Fig. 8 is thus a slit circumscribing the port hole channel 152.
  • the relation between the inner rim height h and the outer rim height H, h/H may be 75%, 80%, 85%, 90% or 95%.
  • the relation of the inner rim height h and the outer rim height H, h/H, may be at least 80%.
  • each of the second heat exchanger plates 200 also comprises at least one first opening 01 in form of a restriction hole 01 , which extends through the peripheral outer rim 13. It should be noted that each peripheral outer rim 13 may be provided with one or more first openings 01.
  • the first opening 01 or restriction hole 01 forms a fluid passage for the first fluid from the port hole channel 152 to the first plate interspaces 11.
  • the first opening 01 or restriction hole 01 may be circular, oval, or may have any other shape, seen from the restricted volume V1.
  • the first opening 01 may have an oval or other elongated shape, wherein the elongated shape extends in parallel to the extension plane P to maximize the distance to the root end 17 and the top end 16.
  • the first opening 01 or restriction hole 01 may be premade before the heat exchanger plates 100, 200 are assembled and joined to each other to form the plate heat exchanger 10.
  • the first opening 01 or restriction hole 01 may be centrally located between the root end 17 and the top end 16 of the peripheral rim.
  • the restriction hole 10 is thus located at the same distance from the root end 17 and the top end 16.
  • the diameter of the first opening 01 or restriction hole 01 may be maximum 15 mm.
  • the heat exchanger 10 of Fig. 8 may generally be manufactured by the following manufacturing steps.
  • the first heat exchanger plates 100 may be provided with a peripheral inner rim 15 around the port hole channel 152, wherein the peripheral inner rim 15 initially extends in parallel with the extension plane P.
  • the peripheral inner rim 15 may then bent to extend transversely to the extension plane P from the top end 16 towards a root end 17 with an inner rim height h perpendicular to the extension plane P.
  • the first opening 01 or restriction hole 01 may be made through the peripheral outer rim 13 by any suitable hole-making method, such as drilling, laser beam cutting, electron beam cutting, etc. It is to be noted that the restriction hole 01 may be made before or after bending of the peripheral rim 13.
  • first and second heat exchanger plates 100, 200 may be stacked in an alternating fashion with braze material between adjacent first and second heat exchanger plates 100, 200.
  • the first heat exchanger plates 100, the second heat exchanger plates 200 and the braze material may be heated to melt the braze material.
  • the melted braze material may be attracted by areas where the first and second heat exchanger plates 100, 200 are close to or adjoining each other.
  • the heat exchanger plates 100, 200 are joined to each other via joints of braze material between the first and second heat exchanger plates 100, 200.
  • the braze material may be provided in the form of foils, instead of being screen printed.
  • the foils are then introduced between adjacent first and second heat exchanger plates 100, 200.
  • the braze material is molten and will flow to the joints which will join the heat exchanger plates 100, 200 to each other.
  • the plate heat exchanger 10 may then comprise primary first plate interspaces for a primary first fluid to be evaporated, secondary first plate interspaces for a secondary first fluid to be evaporated, and second plate interspaces for a second fluid to heat, or possibly cool, the primary and secondary first fluids. There are then two inlet channels leading to the primary first plate interspace and the secondary first plate interspaces, respectively. Each second plate interspace may typically be adjacent to a primary first interspace and a secondary first plate interspace.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention concerne un échangeur de chaleur à plaques (10). L'échangeur de chaleur à plaques comprend des premières plaques d'échangeur de chaleur (100) et des secondes plaques d'échangeur de chaleur (200) formant des premiers espaces intermédiaires de plaque (I1) et des seconds espaces intermédiaires de plaque (I2). Une première plaque d'échangeur de chaleur (100) et une seconde plaque d'échangeur de chaleur (200) sont jointes de manière étanche aux fluides par une première zone de jonction (A1) entourant un canal à orifice (152) à une première distance radiale (R1) d'un centre (C) du canal à orifice (152), formant ainsi une première partie de plaque périphérique (102) et une seconde partie de plaque périphérique (202). Une première section (104) de la première partie de plaque périphérique (102) s'étend vers la seconde partie de plaque périphérique (202) et/ou une première section (204) de la seconde partie de plaque périphérique (202) s'étend vers la première partie de plaque périphérique (102) à une seconde distance radiale (R2) à partir du centre (C) du canal à orifice (152), formant ainsi un volume restreint (V1) entre la première partie de plaque périphérique (102) et la seconde partie de plaque périphérique (202) entre la première distance radiale (R1) et la seconde distance radiale (R2), le volume restreint (V1) étant en communication fluidique avec le canal à orifice (152).
PCT/EP2023/083260 2022-12-02 2023-11-28 Échangeur de chaleur à plaques WO2024115433A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202022106757.0U DE202022106757U1 (de) 2022-12-02 2022-12-02 Plattenwärmetauscher
CN202223218050.6U CN219415841U (zh) 2022-12-02 2022-12-02 板式热交换器
CN202223218050.6 2022-12-02
DE202022106757.0 2022-12-02

Publications (1)

Publication Number Publication Date
WO2024115433A1 true WO2024115433A1 (fr) 2024-06-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/083260 WO2024115433A1 (fr) 2022-12-02 2023-11-28 Échangeur de chaleur à plaques

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WO (1) WO2024115433A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080196874A1 (en) * 2005-04-13 2008-08-21 Alfa Laval Corporate Ab Plate Heat Exchanger
US20150292803A1 (en) * 2012-11-07 2015-10-15 Alfa Laval Corporate Ab Method of making a plate package for a plate heat exchanger
US9310136B2 (en) * 2008-12-17 2016-04-12 Swep International Ab Port opening of heat exchanger
KR20200027773A (ko) * 2018-09-05 2020-03-13 엘지전자 주식회사 판형 열교환기
KR102115918B1 (ko) * 2018-10-12 2020-05-27 엘지전자 주식회사 판형 열교환기
KR102143006B1 (ko) * 2018-08-31 2020-08-10 엘지전자 주식회사 판형 열교환기

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080196874A1 (en) * 2005-04-13 2008-08-21 Alfa Laval Corporate Ab Plate Heat Exchanger
US9310136B2 (en) * 2008-12-17 2016-04-12 Swep International Ab Port opening of heat exchanger
US20150292803A1 (en) * 2012-11-07 2015-10-15 Alfa Laval Corporate Ab Method of making a plate package for a plate heat exchanger
KR102143006B1 (ko) * 2018-08-31 2020-08-10 엘지전자 주식회사 판형 열교환기
KR20200027773A (ko) * 2018-09-05 2020-03-13 엘지전자 주식회사 판형 열교환기
KR102115918B1 (ko) * 2018-10-12 2020-05-27 엘지전자 주식회사 판형 열교환기

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