• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A heat exchanger plate (1) for a plate heat exchanger comprises a heat exchanger area (4), extending in parallel with an extension plane and delimited by at least three sides (5, 6) connected to each other by at least three curved corners (7). A longitudinal central axis (x) extends in parallel with the extension plane (p) through at least one of the sides. A plurality of portholes (9) extends through the heat exchanger area. An edge flange (8) extends outside and around the heat exchanger area along the sides. The edge flange is inclined in relation to the extension plane. The edge flange comprises a flange corrugation (20) of ridges (21) and valleys (22) provided along the curved corners.
    公开号:SE1651143A1
    申请号:SE1651143
    申请日:2016-08-25
    公开日:2018-02-26
    发明作者:Romlund Jens
    申请人:Alfa Laval Corp Ab；
    IPC主号:
    专利说明:

    A heat exchanger plate, and a plate heat exchangerTECHNICAL FIELD OF THE INVENTIONThe present invention refers to a heat exchanger plate for a plateheat exchanger, the heat exchanger plate comprisinga heat exchanger area extending in parallel with an extensionplane, wherein the heat exchanger area is delimited by at leastthree sides which are connected to each other by at least threecurved corners,a longitudinal central axis extending in parallel with the extensionplane through at least one of the sides,a plurality of portholes extending through the heat exchangerarea, andan edge flange extending outside and around the heat exchangerarea along the sides, wherein the edge flange is inclined inrelation to the extension planeThe invention also refers to a plate heat exchanger comprising aplurality of heat exchanger plates.
    BACKGROUND OF THE INVENTION AND PRIOR ARTA heat exchanger plate of this kind is disclosed in US-8,061,416.When pressing such heat exchanger plates, plate holders and aforming ring are used to hold the raw plate and form the flange ofthe heat exchanger plate during the pressing operation. However,due to the excess of material from the radius reduction of theflange at the corners, the material the edge flange at the curvedcorners is easily wrinkled.
    SUMMARY OF THE INVENTIONThe object of the present invention is to remedy the problemsdiscussed above. ln particular, it is aimed at a prevent wrinklingof the edge flange at the curved corners of the heat exchangerplate.
    This object is achieved by the heat exchanger plate initiallydefined, which is characterized in that the edge flange comprisesa corrugation of ridges and valleys provided along the curvedcorners.
    The flange corrugation provides a better handling of excessmaterial of the edge flange along the curved corners. The flangecorrugation forms a controlled folding of the edge flange. Thus,undesired folding or wrinkling, and portions of thicker material asa result of the pressing operation can be avoided. The pressingoperation may be performed without any plate holders holding theheat exchanger plate during the pressing operation.
    The flange corrugation also contributes to an improved locking ofthe heat exchanger plates when they are stacked on each other.The position of the heat exchanger plates relative to each otheris more determined than if the edge flange at the curved cornershave no corrugation.
    Furthermore, the flange corrugation may provide the inclinededge flange with an elasticity at the curved corners, which mayfacilitate the achievement of a tight abutment against adjacentheat exchanger plates. The flange corrugation may alsocontribute to an improved resistance against thermal fatigue andan improved burst pressure resistance at the curved corners.ln addition, the flange corrugation of the edge flange at the curvedcorners may cause a turbulent flow around ports, which impedesfreezing in these areas.
    According to an embodiment of the invention, the ridges andvalleys of the flange corrugation extend along a direction awayfrom extension plane of the heat exchanger area. Said directionmay cross the extension plane. The flange corrugation of ridgesand valleys extending in said direction may absorb a significantamount of excessive material of the edge flange at the curvedcorners.
    According to a further embodiment of the invention, the edgeflange has a root end at the heat exchanger area, and an outerend, wherein the edge flange is inc|ined from the root end to theouter end. Advantageously, the edge flange may be inc|ined withan inc|ination angle that is constant from the root end to the outerend.
    According to a further embodiment of the invention, the ridgesand the valleys of the flange corrugation extend from the root endto the outer end along the curved corners.
    According to a further embodiment of the invention, the edgeflange comprises a transition zone, which extends between theheat exchanger area and the flange corrugation, wherein theflange corrugation extends from the transition zone to the outerend. Thus, the transition zone may have no corrugation or providean evenly curved surface of the edge flange along the curvedcorners between the heat exchanger area and the flangecorrugation.
    According to a further embodiment of the invention, the heatexchanger area comprises a heat transfer corrugation. Such heattransfer corrugation may improve the heat transfer between themedia circulation through the plate heat exchanger.
    According to a further embodiment of the invention, the heattransfer corrugation comprises ridges and valleys. The heattransfer corrugation may have various geometrical shapes, andmay, instead of ridges and valleys, comprise other kinds ofcorrugations, such as dimples or similar spot shaped depressionsand/or protrusions.
    According to a further embodiment of the invention, the ridgesand valleys of the heat transfer corrugation extend along adirection crossing the longitudinal central axis. For instance, theridges and valleys may extend along one direction from one of thesides to an opposite one of the sides, or the ridges and valleysmay extend along two directions which meet at the longitudinalcentral axis, thus forming a fishbone pattern.
    According to a further embodiment of the invention, the at leastthree sides comprise two opposite long sides and two oppositeshort sides. The long sides and the opposite sides may be straightor substantially straight.
    According to a further embodiment of the invention, the flangecorrugation is also provided on the edge flange along the longsides, or along the whole length of the long sides.
    According to a further embodiment of the invention, the flangecorrugation is also provided on the edge flange along the shortsides.
    The object is also achieved by the plate heat exchanger initiallydefined, comprising a plurality of heat exchanger plates asdefined above.
    The plate heat exchanger according to the invention will takeadvantage of the technical advantages and properties of the heatexchanger plates explained above. Since excessive material andwrinkling of the edge flange at the curved corners may beavoided, the heat exchanger plates will fit better to each otherwhen the plate heat exchanger is assembled. Since the flangecorrugation along the curved corners is elastic and flexible, theheat exchanger plates are more flexible and thus easily stackedonto each other when the plate heat exchanger is assembled.
    According to a further embodiment of the invention, the heatexchanger plates are permanently joined to each other. Suchpermanent joining may be obtained through bonding, brazing,welding, gluing etc.
    According to a further embodiment of the invention, the ridges ofthe flange corrugation of one of the heat exchanger plates adjoin,or abut, the ridges of the flange corrugation of the heat exchangerplates provided adjacent to said one heat exchanger plate. Moreprecisely, the whole surface of the edge flange of one heatexchanger plate may thus adjoin the whole surface of the edgeflange of the adjacent heat exchanger plate or plates. Thiscontributes to the improved stiffness and improved strength of theplate heat exchanger according to the invention.
    BRIEF DESCRIPTION OF THE DRAWINGSThe present invention is now to be explained more closely througha description of various embodiments and with reference to thedrawings attached hereto.
    Fig 1 discloses a plan view of a plate heat exchangeraccording to a first embodiment of the invention.
    Fig 2 discloses a longitudinal section through the plate heatexchanger along the line ll-ll in Fig 1.
    Fig 3 discloses a side view of the plate heat exchanger inFig 1.
    Fig 4 discloses a plan view of a heat exchanger plate of theplate heat exchanger in Fig 1.
    Fig 5 discloses a side view of a part of an edge flange of theheat exchanger plate in Fig 4.
    Fig 6 discloses a perspective view of a part of an edgeflange of a heat exchanger plate according to a secondembodiment of the invention.
    DETAILED DESCRIPTION OF VARIOUS EMBODIMENTSFigs 1 to 3 disclose a plate heat exchanger comprising a pluralityof heat exchanger plates 1 arranged beside each other in theplate heat exchanger. The heat exchanger plates 1 arepermanently joined to each other. ln the embodiments disclosed,the heat exchanger plates are permanently joined to each otherthrough brazing. lt should be noted that other joining techniquesare also possible, such as bonding, welding, gluing etc. The heatexchanger plates 1 may also be non-permanently joined to eachother, for instance by means of tie bolts.
    Each of the heat exchanger plates 1 extends in parallel with anextension plane p.
    The heat exchanger plates 1 are arranged side by side in such ina way that first plate interspaces 2 for a first fluid and secondplate interspaces 3 for a second fluid are formed.
    The first plate interspaces 2 and the second plate interspaces 3are provided side by side in an alternating order in the plate heatexchanger, as can be seen in Fig 2.
    Each of the heat exchanger plates 1 comprises a heat exchangerarea 4 extending in parallel with the extension plane p, see Fig 4.
    The heat exchanger area 4 may comprise, or be limited by at leastthree sides, and may have a triangular, rectangular, pentagonalor any other suitable shape.ln the embodiments disclosed, the heat exchanger plates 1 arerectangular, or substantially rectangular, with two opposite longsides 5 and two opposite short sides 6. The short sides 6 and thelong sides 5 may be straight and are connected to each other byfour curved corner 7. A longitudinal central axis x extends inparallel with the extension plane p through the short sides 6. Ascan be seen in Fig 4, the longitudinal central axis x may beparallel with the long sides 5.
    The heat exchanger plate 1 also comprises an edge flange 8,which extends outside and around the heat exchanger area 4along the sides, i.e. in the embodiments disclosed along the longsides 5, the short sides 6 and the corners 7. The edge flange 8 isinclined in relation to the extension plane p, with an angle oi ofinclination, see Fig 5.
    The heat exchanger plate 1 also comprises four portholes 9,which extend through the heat exchanger area 4.
    The heat exchanger area 4 comprises a heat transfer corrugation10. ln the embodiments disclosed, the heat transfer corrugationcomprises or consists of ridges 11 and valleys 12, see Fig 4.
    The heat transfer corrugation 10 may form various patterns, forinstance a diagonal pattern, a fishbone pattern, etc. as is knownin the art of plate heat exchangers. ln the embodiments disclosed,the heat transfer corrugation 10 forms a fishbone pattern of theridges 11 and the valleys 12 extending along a direction crossingthe longitudinal central axis x. The ridges 11 and valleys 12 forma positive angle of inclination on one side of the longitudinalcentral axis x and a corresponding negative angle of inclinationon the other of the longitudinal central axis x.
    Other geometrical shapes of the heat transfer corrugation 10 arealso possible, for instance a corrugation of dimples or other spotshaped depressions and/or protrusions.
    As can be seen in Fig 4, the ridges 11 and valleys 12 of the heattransfer corrugation 10 extend to the long sides 5.
    The edge flange 8 of the heat exchanger plate 1 comprises aflange corrugation 20 of ridges 21 and valleys 22. The flangecorrugation 20 is provided on the edge flange 8 along the curvedcorners 7 as can be seen in Fig 4.
    The ridges 21 and valleys 22 of the flange corrugation 20 extendalong a secondary direction away y from extension plane p of theheat exchanger area 4, see Fig 5.
    The number of ridges 21 of the flange corrugation 20 at eachcurved corner 7 may be 1 - 9, for instance 2 - 8, more specifically3 - 7.
    Each ridge 21 of the flange corrugation 20 at each curved corner7 may adjoin a valley 22, or each valley 22 of the flangecorrugation 20 at each curved corner 7 may adjoin a ridge 21.
    The edge flange 8 has a root end 25 at the heat exchanger area4 and an outer end 26. The edge flange 8 is inclined from the rootend 25 to the outer end 26, especially with the above mentionedangle oi of inclination.
    The ridges 21 and the valleys 22 of the flange corrugation 20extend from the root end 25 to the outer end 26 as can be seenin Fig 5, which discloses the flange corrugation 20 of a part of acurved corner 7 of the edge flange 8.
    The heat transfer corrugation 10 extends to the root end 25 of theedge flange 8, as can be seen in Fig 4.
    As mentioned above, the plate heat exchanger is a brazed plateheat exchanger. The individual heat exchanger plates 1 arecompression molded to obtain the shape disclosed and describedherein. The heat exchanger plates 1 are the stacked onto eachother with a sheet of braze material between each heat exchangerplate 1. Moreover, the heat exchanger plates 1 are stacked ontoeach other so that the ridges 21 of the flange corrugation 20 ofone of the heat exchanger plates 1 adjoin the ridges 21 of theflange corrugation 20 of the heat exchanger plates 1 providedadjacent to said one heat exchanger plate 1. ln the same way, thevalleys 22 of the flange corrugation 20 of one of the heatexchanger plates 1 adjoin the valleys 22 of the flange corrugation20 of the heat exchanger plates 1 provided adjacent to said oneheat exchanger plate 1. The whole surface of the edge flange 8of one heat exchanger plates 1 may thus adjoin the whole surfaceof the edge flange 8 of the adjacent heat exchanger plate 1 orplates 1.ln the plate heat exchanger with heat exchanger plates 1according to the embodiments disclosed, the portholes 9 of theheat exchanger plates 1 may form a first inlet port 31 for the firstfluid to the first plate interspaces 2, a first outlet port 32 for thefirst fluid from the first plate interspaces 2, a second inlet port 33for the second fluid to the second plate interspaces 3, and asecond outlet port 34 for the second fluid from the second plateinterspaces 3, see Fig 1. Each of the ports 31-34 may comprise aconnection pipe, as can be seen in Figs 2 and 3.
    The outermost heat exchanger plate 1, at which the ports 31-34are provided, may form frame plate, and the opposite outermostheat exchanger plate 1 may form a pressure plate.
    The stack of heat exchanger plates 1 is then brazed by beingheated to a suitable temperature. The stack is held togetherduring the heating and following cooling by a deadweight providedon top of the stack.
    Fig 6 discloses a heat exchanger plate 1 according to a secondembodiment, which differs from the first embodiment only in that,the edge flange 8 comprises a transition zone 28, which extendsbetween the heat transfer corrugation 10 and the flangecorrugation 20. The transition zone 28 starts at the root end 25and extends towards the outer end 26. The flange corrugation 20thus extends from the transition zone 28 to the outer end 26 ofthe edge flange 8 along the curved corners 7.
    The invention is not limited to the embodiments disclosed, butmay be varied and modified within the scope of the followingclaims.
    The invention is applicable to all permanently joined plate heatexchangers, especially brazed plate heat exchanger, not onlythose for two fluids, but also plate heat exchangers for more thantwo fluids, for instance three fluids.
    Furthermore, the heat exchanger plate may then have more orless than four portholes, for instance two portholes, six portholesetc.
    权利要求:
    Claims (12)
    [1] 1. A heat exchanger plate (1) for a plate heat exchanger, theheat exchanger plate (1) comprising a heat exchanger area (4) extending in parallel with an extensionplane (p), wherein the heat exchanger area (4) is delimited by atleast three sides (5, 6) which are connected to each other by atleast three curved corners (7), a longitudinal central axis (x) extending in parallel with theextension plane (p) through at least one of the sides (5), a plurality of portholes (9) extending through the heat exchangerarea (4), and an edge flange (8) extending outside and around the heatexchanger area (4) along the sides (5, 6), wherein the edge flange(8) is inclined in relation to the extension plane (p),characterized in that the edge flange (8) comprises a corrugation(20) of ridges (21) and valleys (22) provided along the curvedcorners (7).
    [2] 2. A heat exchanger plate according to claim 1, wherein theridges (21) and valleys (22) of the flange corrugation (20) extendalong a direction (y) away from extension plane (p) of the heatexchanger area (4).
    [3] 3. A heat exchanger plate according to any one of claims 1 and2, wherein the edge flange (8) has a root end (25) at the heatexchanger area (4), and an outer end (26), wherein the edgeflange (8) is inclined from the root end (25) to the outer end (26).
    [4] 4. A heat exchanger plate according to claim 3, wherein theridges (21) and the valleys (22) of the flange corrugation (20)extend from the root end (25) to the outer end (26).
    [5] 5. A heat exchanger plate according to any one of claims 3 and4, wherein the edge flange (8) comprises a transition zone (28),which extends between the heat exchanger area (4) and the 12 corrugation (20), and wherein the flange corrugation (20) extendsfrom the transition zone (28) to the outer end (26).
    [6] 6. A heat exchanger plate according to any one of thepreceding claims, wherein the heat exchanger area comprises aheat transfer corrugation (10).
    [7] 7. A heat exchanger plate according to claim 6, wherein theheat transfer corrugation (10) comprises ridges (11) and valleys(12).
    [8] 8. A heat exchanger plate according to claim 7, wherein ridges(11) and valleys (12) of the heat transfer corrugation (10) extendalong a direction crossing the longitudinal central axis (x).
    [9] 9. A heat exchanger plate according to any one of thepreceding claims, wherein the at least three sides (5, 6) comprisetwo opposite long sides (5) and two opposite short sides (6),
    [10] 10. A plate heat exchanger comprising a plurality of heatexchanger plates (1) according to any one of the precedingclaims.
    [11] 11. A plate heat exchanger according to claim 10, wherein theheat exchanger plates (1) are permanently joined to each other.
    [12] 12. A plate heat exchanger according to any one of claims 10and 11, wherein the ridges (21) of the flange corrugation (20) ofone of the heat exchanger plates (1) adjoin the ridges (21) of theflange corrugation (20) of the heat exchanger plates (1) providedadjacent to said one heat exchanger plate (1).
    类似技术:
    公开号 | 公开日 | 专利标题
    CA2719328C|2013-06-11|A plate heat exchanger
    US9534854B2|2017-01-03|Heat exchanger plate and a plate heat exchanger
    US20110036549A1|2011-02-17| Plate Heat Exchanger
    EP3032208B1|2017-04-19|Gasket groove for a plate heat exchanger
    US8887796B2|2014-11-18|Plate heat exchanger
    SE1651143A1|2018-02-26|A heat exchanger plate, and a plate heat exchanger
    US10724801B2|2020-07-28|Heat exchanger plate and a plate heat exchanger
    WO2018114288A1|2018-06-28|A plate heat exchanger
    SE1651142A1|2018-02-26|A heat exchanger plate, and a plate heat exchanger
    KR102122781B1|2020-06-15|Heat exchanger plate for plate heat exchanger, and plate heat exchanger
    JP4874365B2|2012-02-15|Plate heat exchanger and refrigeration cycle apparatus using the heat exchanger
    SE1950562A1|2020-11-11|A heat exchanger plate, and a plate heat exchanger
    TW202043691A|2020-12-01|A heat exchanger plate, and a plate heat exchanger
    同族专利:
    公开号 | 公开日
    DE102017213781A1|2018-03-01|
    SE542057C2|2020-02-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BRPI0413194B1|2003-08-01|2019-04-30|Behr Gmbh & Co. Kg|HEAT CHANGER, ESPECIALLY RADIATOR FOR AUTOMOTIVE VEHICLE OIL|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1651143A|SE542057C2|2016-08-25|2016-08-25|A heat exchanger plate, and a plate heat exchanger|SE1651143A| SE542057C2|2016-08-25|2016-08-25|A heat exchanger plate, and a plate heat exchanger|
    DE102017213781.9A| DE102017213781A1|2016-08-25|2017-08-08|Heat exchanger plate and plate heat exchanger|
    [返回顶部]