• 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 plate heat exchanger, and a heat exchanger plate (1) for the plate heat exchanger for heat exchange between a first fluid and a second fluid are disclosed. The heat exchanger plate comprises a heat exchanger area (10) comprising a first end zone (A), a central main zone (B) adjoining the first end zone, a second end zone (C) adjoining the central main zone, and a corrugation of ridges (13) and valleys (14) on the heat exchanger area. A longitudinal center axis (x) extends along and through the three zones. The ridges and valleys extend along a respective continuous line (16), which is at least partly curved and forms an angle (a) of inclination with the longitudinal center axis. The angle of inclination at the longitudinal center axis is less steep for the continuous lines at the first end zone than at the central main zone.(Fig 3)
    公开号:SE1650241A1
    申请号:SE1650241
    申请日:2016-02-24
    公开日:2017-08-25
    发明作者:Romlund Jens
    申请人:Alfa Laval Corp Ab；
    IPC主号:
    专利说明:

    A heat exchanger plate for a plate heat exchanger, and a plateheat exchanger The present invention refers to a heat exchanger plate for a plateheat exchanger for heat exchange between at least a first fluidand a second fluid, the heat exchanger plate comprising a heatexchanger area comprising a first end zone, a central main zoneadjoining the first end zone, a second end zone adjoining thecentral main zone, and a corrugation of ridges and valleys, whichextends on the first end zone, the central main zone and thesecond end zone, and a longitudinal center axis, which extendsalong and through the first end zone, the central main zone andthe second end zone, wherein the ridges and valleys extend alonga respective continuous line.
    The invention also refers to a plate heat exchanger comprising aplurality of heat exchanger plates. The plate heat exchanger maybe a plate heat exchanger for any kind of fluids. ln particular, theplate heat exchanger may be an evaporator or a condenser. ln plate heat exchangers, it is important to ensure that the fluidthat enters the plate interspaces of the plate heat exchanger isdistributed in an efficient manner over the whole heat exchangerarea. ln particularly, a distribution of the fluid towards the longside edges of the heat exchanger area is essential in order toenable the use of the whole heat exchanger area. ln order to achieve such a proper distribution of the fluid enteringthe plate interspaces, it is known to provide at least one of theend zones, on which two portholes are located, with a corrugationof ridges and valleys which has a less steep angle of inclinationin relation to the longitudinal center axis. Such an angle ofinclination will force the fluid outwards towards the long sideedges.
    However, such a less steep inclination of the corrugation on theend zone is disadvantageous in that the flow of the fluid isdisturbed in the transition from the end zone to the central mainzone, which has a more steep inclination of the corrugation for amore optimized heat transfer.
    WO 2015/082348 discloses a plate heat exchanger withoutstraight flow channels for exchanging heat between fluids. Theheat exchanger comprises a number of heat exchanger platesprovided with a pressed pattern of ridges and grooves with apitch. The heat exchanger plates are kept at a distance from eachother by contact between ridges and grooves of neighboringplates in contact point. The contact points are positioned so thatno straight lines are formed along the length of the heatexchanger plates.
    US 7.013.963 discloses a circular plate heat exchanger with heatexchanger plates having ridges and grooves extending alongevolvent graphs.
    US 2,777,674 discloses a plate heat exchanger with rectangularheat exchange plates having two portholes at the respective endzones of the heat exchanger plates. A corrugation of ridges andvalley is provided on a central zone. The ridges and valleysextend a respective continuous curved line.
    SUMMARY OF THE INVENTION The object of the present invention is to overcome the problemsdiscussed above, and to provide an improved flow of the fluidthrough a plate interspace in a plate heat exchanger, and animproved distribution of the fluid in the plate interspace oversubstantially the whole heat exchanger area.
    This object is achieved by the heat exchanger plate initiallydefined, which is characterized in that the continuous line is curved, or at least partly curved, and forms an angle of inclinationwith the longitudinal center axis, and that the angle of inclinationat the longitudinal center axis is less steep for each, orsubstantially each, of the continuous lines at the first end zonethan at the central main zone.
    With such a heat exchanger plate, it is possible to change theinclination of the corrugation from a less steep inclination relativeto the longitudinal center axis at the first end zone to a more steepinclination at the central main zone. This change of the inclinationmay be continuous, and thus all abrupt changes of the inclinationmay be avoided. The first fluid is thus permitted to flow smoothlyfrom the first end zone to the central main zone.
    The less steep inclination at the first end zone, ensures a properdistribution of the first fluid over the whole width of the heatexchanger area. The flow resistance will be relatively great at thefirst end zone, which will force the first fluid outwards towards thelong side edges of the heat exchanger area.
    The more steep inclination at the central main zone may ensurean optimum or maintained heat transfer at the central main zone.The flow resistance at the central main zone may be smaller thanthe flow resistance at the first end zone. A continuous decreaseof the flow resistance from the first end zone to the central mainzone may be achieved.
    The ridges and valleys are thus inclined in relation to thelongitudinal center axis. The ridges and valleys may, at least onthe central main zone, cross the longitudinal center axis.
    Since the ridges and valleys extend along a respective continuousline, there will be no abrupt changes of the direction of the ridgesand the valleys. The so called arrow pattern, which in the prior arthas caused disturbances or bypasses at the longitudinal centeraxis, may be avoided.
    The continuous and curved extension of the ridges and valleysalso contributes to an improved strength of the heat exchangerplate.
    According to an embodiment of the invention, the angle ofinclination at any longitudinal line extending on the heatexchanger area in parallel with the longitudinal center axis is lesssteep for each continuous line at the first end zone at said anylongitudinal line than for each continuous line at the central mainzone at said any longitudinal line.
    According to an embodiment of the invention, the heat exchangerarea has a first long side edge and a second long side edge,wherein the ridges and valleys of at least the central main zoneextends from the first long side edge to the second long sideedge.
    According to an embodiment of the invention, the heat exchangerarea has a first short side edge, delimiting the first end zone anda second short side edge delimiting the second end zone.
    According to an embodiment of the invention, the heat exchangerplate comprises two portholes located on the first end zone, andtwo portholes located on the second end zone. The longitudinalcenter axis may extend between the two portholes on the first endzone, and between the two portholes on the second end zone.
    One of the portholes at the first end zone may be comprised byan inlet for the first fluid, and the other of the portholes at the firstend zone may be comprised by an outlet for the second fluid. ln a corresponding manner, one of the portholes at the secondend zone may be comprised by an inlet for the second fluid, andthe other of the portholes at the second end zone may becomprised by an outlet for the first fluid.
    According to an embodiment of the invention, the distancebetween adjacent ridges, or the peaks of the ridges, is equal onthe heat exchanger area. lt follows that also the distance betweenadjacent valleys may be equal on the heat exchanger area. Thisequidistant positioning of the ridges, and the valleys, is alsoadvantageous and contributes to a uniform distribution of contactpoints between the ridges of the heat exchanger plate and thevalleys of an adjacent heat exchanger plate in the plate heatexchanger. ln the same way, the equidistant positioning of theridges, and the valleys, contributes to a uniform distribution ofcontact points between the valleys of the heat exchanger plateand the ridges of an adjacent heat exchanger plate in the plateheat exchanger.
    According to an embodiment of the invention, the heat exchangerplate comprises an outer edge area surrounding the heatexchanger area. The outer edge area may form a flange beinginclined in relation to an extension plane of the heat exchangerarea. Such a flange may adjoin a corresponding flange of anadjacent heat exchanger plate in the plate heat exchanger.
    According to an embodiment of the invention, the continuous lineshave at least one elliptic or oval extension, in particular at leastone circular extension. The continuous lines thus may be a partof an ellipse, a circle or an oval ring.
    According to an embodiment of the invention, the continuous lineshave at least one common center point located outside the heatexchanger area. ln the case that the continuous lines have anelliptic extension, they have two common center points outsidethe heat exchanger area.
    According to an embodiment of the invention, the angle ofinclination is less steep for each, or substantially each, of thecontinuous lines at the second end zone than at the central main zone. This embodiment provides the same advantages for thesecond fluid flowing from the second end zone to the central mainzone as for the first fluid flowing from the first end zone to thecentral main zone.
    According to an embodiment of the invention, the heat exchangerplate comprises a first half comprising the first end zone and a first part of thecentral main zone, and a second half comprising the second end zone and a second partof the central main zone, wherein the first half and the second half adjoin each other alonga dividing line.
    According to an embodiment of the invention, the continuous lineson the first half extend with an elliptic extension, in particular acircular extension, and continue on the second half with an ellipticextension, in particular a circular extension.
    According to an embodiment of the invention, the continuous lineson the first half have a first common center point, or at least onefirst common center point, located outside a first side of the heatexchanger area, and the continuous lines on the second half havea second common center point, or at least one second commoncenter point, located outside a second side of the heat exchangerarea.
    According to an embodiment of the invention, the continuous linesat the dividing line extend perpendicularly to the dividing line.
    The object is also achieved by the plate heat exchanger initiallydefined, which comprises a plurality of heat exchanger plates asaccording to the various embodiments explained above.
    According to an embodiment of the invention, the heat exchangerplates comprises first heat exchanger plates and second heat exchanger plates arranged in an alternating order in the plateheat exchanger, wherein the angle of inclination of the first heatexchanger plates is equal to but with reversed sign in comparisonwith the angle of inclination of the second heat exchanger plates.
    BRIEF DESCRIPTION OF THE DRAWINGSThe present invention is now to be explained more closely through a description of various embodiments and with reference to thedrawings attached hereto.
    Fig 1 discloses schematically a plan view of a plate heatexchanger according to a first embodiment of theinvenüon Fig 2 discloses schematically a longitudinal sectional viewalong the line ll-ll in Fig1 Fig 3 discloses schematically a plan view of a heat exchangerplate of the plate heat exchanger in Fig 1 Fig 4 discloses schematically a plan view of another heatexchanger plate of the plate heat exchanger in Fig 1 Fig 5 discloses schematically a plan view of a heat exchangerplate for a plate heat exchanger according to a secondembodiment Fig 6 discloses schematically another heat exchanger plate for the plate heat exchanger according to the secondembodiment.
    DETAILED DESCRIPTION OF VAIOUS EMBODIMENT Figs 1 and 2 discloses a plate heat exchanger comprising aplurality of heat exchanger plates 1. The heat exchanger plates 1 are provided beside each other to form first plate interspaces 2and second plate interspaces 3 in the plate heat exchanger. Thefirst and second plate interspaces 2 and 3 are provided in analternating order in the plate heat exchanger.
    The plate heat exchanger comprises a first inlet 4 and a first outlet5 for a first fluid. The plate heat exchanger also comprises asecond inlet 6 and a second outlet 7 for a second fluid. The firstfluid passes through the first plate interspaces 2 and the secondfluid passes through the second plate interspaces 3. lt may be noted that the plate heat exchanger may also beconfigured for more than two fluids, for instance three fluids,wherein the fluids pass respective plate interspace. ln this case,the plate heat exchanger may comprise also a third inlet and athird outlet.
    A longitudinal center axis x extends along the plate heatexchanger, and along each heat exchanger plate 1. ln the plate heat exchanger disclosed, the heat exchanger plates1 are permanently joined to each other through any suitablejoining technique, for instance brazing, welding, gluing, etc. lt may be noted, however, that the plate heat exchanger also maycomprise heat exchanger plates 1, which are kept together bymeans of tie bolts (not disclosed in the drawings), whereingaskets (not disclosed in the drawings) are provided between theheat exchanger plates 1 to seal the first and second plateinterspaces 2 and 3 from each other and from the surroundingenvironment.
    Fig 3 discloses one of the heat exchanger plates 1 of the plateheat exchanger. The heat exchanger plate 1 has a rectangular,or generally rectangular, shape with rounded corners, andextends in parallel with an extension plane p, see Fig 2.
    The heat exchanger plate 1 comprises a heat exchanger area 10which comprises a first end zone A, a central main zone B, whichadjoins the first end zone A, and a second end zone C, whichadjoins the central main zone B.
    The longitudinal center axis x extends along and though the firstend zone A, the central main zone B and the second end zone C.The heat exchanger plate 1 comprises two portholes 11 providedon the first end zone A on a respective side of the longitudinalcenter axis x, and two portholes 12 provided on the second endzone C on a respective side of the longitudinal center axis x. ln case of three fluids, as mentioned above, the heat exchangerplate 1, may comprise three portholes 11 on the first end zone A,and three portholes 12 on the second end zone C.
    The two portholes 11 on the first end zone A may be comprisedby the first inlet 4 and the second outlet 7. The two portholes 12on the second end zone C may be comprised by the first outlet 5and the second inlet 6.
    The heat exchanger plate 1 also comprises an outer edge area13 surrounding the heat exchanger area 10, i.e. the first end zoneA, the central main zone B and the second end zone C. ln the plate heat exchanger disclosed, the outer edge area 13form a flange which is inclined in relation to the extension planep of the heat exchanger area 10, see Fig 2. The flange of theouter edge area 13 of the heat exchanger plate 1 adjoins, andmay be joined to, a corresponding flange of an outer edge area13 of an adjacent heat exchanger plate 1 in the plate heatexchanger.
    The heat exchanger area 10 comprises a corrugation of ridges 14and valleys 15. The corrugation extends on the first end zone A,the central main zone B and the second end zone C.
    The ridges 14 and valleys 15 extend along a respectivecontinuous line 16, which is curved, or continuously curved, andforms an angle d of inclination with the longitudinal center axis x.The continuous lines 16 extends along the peak of the ridges 14and the valleys 15. ln the first embodiment, the continuous lines 16 are curved alongtheir whole length on the heat exchanger area 10.
    The heat exchanger area 10 has a first long side edge 17, asecond long side edge 18, a first short side edge 19 and a secondshort side edge 20. The ridges 13 and valleys 14 of at least thecentral main zone B extends from the first long side edge 17 tothe second long side edge 18. The first short side edge 19,delimits the first end zone A. The second short side edge 20delimits the second end zone C.
    The distance d between adjacent ridges 14, or the peak ofadjacent ridges 14, is equal on the heat exchanger area 10, orthe whole heat exchanger area 10. lt follows that the distance dis the same between the adjacent valleys 15 on the heatexchanger area 10, and for the continuous lines 16.
    As can be seen in Fig 3, the angle d of inclination at thelongitudinal center axis x is less steep for the continuous lines 16at the first end zone A than for the continuous lines 16 at thecentral main zone B.
    This is also valid for any longitudinal line 21 extending of the heatexchanger area 10 in parallel with the longitudinal center axis x.Consequently, the angle d of inclination at said any longitudinalline 21 is less steep for each continuous line 16 at the first end 11 zone A at said any longitudinal line 21 than for each continuousline 16 at the central main zone B at said any longitudinal line 21. ln the first embodiment, the continuous lines 16 have a circularextension, i.e. they form a part of a circle. All the continuous lines16 on the heat exchanger area 10 have a common center point22 located outside the heat exchanger area 10, and in Fig 3 tothe left of the longitudinal center axis x.
    Fig 4 discloses another heat exchanger plate 1 to be included inthe plate heat exchanger shown in Figs 1 and 2. The heatexchanger plate 1 in Fig 4 is identical to the heat exchanger plate1 in Fig 3 but the heat exchanger area is turned 180° so that thecontinuous lines 16 will have their common center point 22located outside the heat exchanger area 10 to the right of thelongitudinal center axis x. ln other words, the heat exchanger plates 1 of the plate heatexchanger comprises first heat exchanger plates 1, shown in Fig3, and second heat exchanger plates 1, shown in Fig 4. The firstand second heat exchanger plates 1 are arranged in analternating order in the plate heat exchanger. As can be seen inFigs 3 and 4, the angle oi of inclination of the first heat exchangerplates 1 is equal to but with reversed sign in comparison with theangle d of inclination of the second heat exchanger plates 1. lt is to be noted that the common center points 22 are onlyschematically indicated and in reality they will be more far fromthe heat exchanger plates 1 than shown in Figs 3 and 4.
    Figs 5 and 6 disclose two heat exchanger plates 1 according to asecond embodiment, which differs from the first embodiment ofthe heat exchanger plates 1 in that the angle d of inclination isless steep also at the second end zone C than at the central mainzone B. 12 The continuous lines 16 will have a circular extension on a firsthalf of the heat exchanger area 10 and another circular extensionon a second half of the heat exchanger area 10. The first halfcomprises the first end zone A and a first part of the central mainzone B. The second half comprising the second end zone C anda second part of the central main zone B.
    The first and second halves are adjoining each other along adividing line 24. At the dividing line 24, the continuous lines 16extend continuously across the dividing line 24. Each of thecontinuous lines 16 is perpendicular, or substantiallyperpendicular, to the dividing line 24 when crossing the dividingline 24. The dividing line 24 is inclined in relation to thelongitudinal center axis x as can be seen in Figs 5 and 6. Theangle of inclination of the dividing line 24 may be 45° in relationto the longitudinal center axis x.
    The continuous lines 16 on the first half of the heat exchangerplate 1 in Fig 5 have a circular extension with a common centerpoint 22 located outside the heat exchanger area 10, and in Fig 5to the left of the longitudinal center axis x. The continuous lines16 on the second half of the heat exchanger plate 1 in Fig 5 havea circular extension with a common center point 22 locatedoutside the heat exchanger area 10, and in Fig 5 to the right ofthe longitudinal center axis x. Also in this case, it is to be notedthat the common center points 22 are only schematically indicatedand in reality they will be located more far from the heatexchanger plates 1 than shown in the figures.
    Also in the second embodiment, the heat exchanger plates 1 ofthe plate heat exchanger comprises first heat exchanger plates 1,shown in Fig 5, and second heat exchanger plates 1, shown inFig 6, wherein the first and second heat exchanger plates 1 arearranged in an alternating order in the plate heat exchanger. AlsoFigs 5 and 6 illustrate that the angle oi of inclination of the firstheat exchanger plates 1 is equal to but with reversed sign in 13 comparison with the angle d of inclination of the second heatexchanger plates 1.
    The invention is not limited to the embodiments disclosed but maybe varied and modified within the scope of the following claims.
    权利要求:
    Claims (15)
    [1] 1. A heat exchanger plate (1) for a plate heat exchanger forheat exchange between at least a first fluid and a second fluid,the heat exchanger plate (1) comprisinga heat exchanger area (10) comprising a first end zone (A), a central main zone (B) adjoining the first end zone (A), a second end zone (C) adjoining the central main zone (B), and a corrugation of ridges (13) and valleys (14), which extends on the first end zone (A), the central main zone (B) and the second end zone (C), anda longitudinal center axis (x), which extends along and throughthe first end zone (A), the central main zone (B) and the secondend zone (C),wherein the ridges (14) and valleys (15) extend along a respectivecontinuous line (16),characterized in that the continuous line (16) is at least partlycurved and forms an angle (d) of inclination with the longitudinalcenter axis (x), and that the angle (d) of inclination at thelongitudinal center axis (x) is less steep for substantially each ofthe continuous lines (16) at the first end zone (A) than at thecentral main zone (B).
    [2] 2. A heat exchanger plate (1) according to claim 1, wherein theangle of inclination at any longitudinal line (21) extending on theheat exchanger area (10) in parallel with the longitudinal centeraxis (x) is less steep for each continuous line (16) at the first endzone (A) at said any longitudinal line (21) than for eachcontinuous line (16) at the central main zone (B) at said anylongitudinal line (21).
    [3] 3. A heat exchanger plate (1) according to any one of claims 1and 2, wherein the heat exchanger area (10) has a first long sideedge (17) and a second long side edge (18), and wherein theridges (14) and valleys (15) of at least the central main zone (B) extends from the first long side edge (17) to the second long sideedge (18).
    [4] 4. A heat exchanger plate (1) according to any one of thepreceding claims, wherein the heat exchanger area (10) has afirst short side edge (19), delimiting the first end zone (A) and asecond short side edge (20) delimiting the second end zone (C).
    [5] 5. A heat exchanger plate (1) according to any one of thepreceding claims, wherein the heat exchanger plate (1) comprisestwo portholes (11) located on the first end zone (A), and twoportholes (12) located on the second end zone (C).
    [6] 6. A heat exchanger plate (1) according to any one of thepreceding claims, wherein the distance (d) between adjacentridges (14) is equal on the heat exchanger area (10).
    [7] 7. A heat exchanger plate (1) according to any one of thepreceding claims, wherein the heat exchanger plate (1) comprisesan outer edge area (13) surrounding the heat exchanger area(10).
    [8] 8. A heat exchanger plate (1) according to any one of thepreceding claims, wherein the continuous lines (16) have at leastone elliptic or oval extension.
    [9] 9. A heat exchanger plate (1) according to any one of thepreceding claims, wherein the continuous lines (16) have at leastone common center point (22) located outside the heat exchangerarea (10).
    [10] 10. A heat exchanger plate (1) according to any one of claims 1to 7, wherein the angle (d) of inclination for substantially each ofthe continuous lines (16) is less steep at the second end zone (C)than at the central main zone (B). 16
    [11] 11. A heat exchanger plate (1) according to claim 10, whereinthe heat exchanger plate (1) comprises a first half comprising the first end zone (A) and a first part of thecentral main zone (B) and a second half comprising the second end zone (C) and a secondpart of the central main zone (B), wherein the first half and the second half adjoin each other alonga dividing line (24).
    [12] 12. A heat exchanger plate (1) according to claim 11, whereinthe continuous lines (16) on the first half have an ellipticextension, in particular a circular extension, and wherein thecontinuous lines (16) on the second half have an ellipticextension, in particular a circular extension.
    [13] 13. A heat exchanger plate (1) according to any one of claims11 and 12, wherein the continuous lines (16) at the dividing line(24) extend perpendicularly to the dividing line (24).
    [14] 14. A plate heat exchanger comprising a plurality of heatexchanger plates (1) according to any one of the precedingclaims.
    [15] 15. A plate heat exchanger according to claim 14, wherein theheat exchanger plates (1) comprises first heat exchanger plates(1) and second heat exchanger plates (1) arranged in analternating order in the plate heat exchanger, and wherein theangle (oi) of inclination of the first heat exchanger plates (1) isequal to but with reversed sign in comparison with the angle (d)of inclination of the second heat exchanger plates (1).
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    JP6562918B2|2013-12-05|2019-08-21|スウェップ インターナショナル アクティエボラーグ|Heat exchange plate with various pitches|
    US10837717B2|2013-12-10|2020-11-17|Swep International Ab|Heat exchanger with improved flow|
    CN103759474B|2014-01-28|2018-01-02|丹佛斯微通道换热器（嘉兴）有限公司|Plate type heat exchanger|TR201904697A2|2019-03-28|2019-06-21|Bosch Termoteknik Isitma ve Klima Sanayi Ticaret Anonim Sirketi|HEAT EXCHANGER PLATE|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1650241A|SE541591C2|2016-02-24|2016-02-24|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|SE1650241A| SE541591C2|2016-02-24|2016-02-24|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
    SI201730536T| SI3420292T1|2016-02-24|2017-01-27|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
    CN201780013085.9A| CN108700388B|2016-02-24|2017-01-27|Heat exchanger plate for a plate heat exchanger and plate heat exchanger|
    US16/071,003| US10767933B2|2016-02-24|2017-01-27|Heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
    JP2018541114A| JP6655195B2|2016-02-24|2017-01-27|Heat transfer plate and plate heat exchanger for plate heat exchanger|
    PCT/EP2017/051715| WO2017144230A1|2016-02-24|2017-01-27|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
    CA3009882A| CA3009882C|2016-02-24|2017-01-27|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
    DK17701699.5T| DK3420292T3|2016-02-24|2017-01-27|HEAT EXCHANGER PLATE FOR A PLATE HEAT EXCHANGER AND A PLATE HEAT EXCHANGER|
    KR1020187027144A| KR102122781B1|2016-02-24|2017-01-27|Heat exchanger plate for plate heat exchanger, and plate heat exchanger|
    EP17701699.5A| EP3420292B1|2016-02-24|2017-01-27|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
    TW106104104A| TWI626419B|2016-02-24|2017-02-08|A heat exchanger plate for a plate heat exchanger, and a plate heat exchanger|
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