• 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:
    HEAT TRANSFER PLATE, AND, PLATE HEAT EXCHANGER. A heat transfer plate (8) and a plate heat exchanger (2) comprising such a heat transfer plate are provided. The heat transfer plate has a central extension plane (cc) and comprises a first end area (28), a heat transfer area (32) and a second end area (30) arranged successfully over a longitudinal central axis (y) of the heat transfer plate. The central longitudinal axis divides the heat transfer plate into a first half and a second half (20, 22). The first end area comprises an entrance port hole (34) arranged within the first half of the heat transfer plate, a distribution area (42) and a transition area (44). The transition area adjacent to the distribution area along a first boundary line (46) and the heat transfer area along a second boundary line (48). The distribution area has a distribution pattern of distribution projections (64) and distribution depressions (66) in relation to the central extension plan, the transition area has a transition pattern of (...).
    公开号:BR112015008857B1
    申请号:R112015008857-0
    申请日:2013-10-10
    公开日:2020-10-27
    发明作者:Magnus Hedberg；Johan Nilsson
    申请人:Alfa Laval Corporate Ab；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The invention relates to a heat transfer plate according to the preamble of claim 1. The invention also relates to a plate heat exchanger comprising such a heat transfer plate. KNOWLEDGE TECHNIQUE
    [002] Plate heat exchangers typically consist of plates with two ends between which a number of heat transfer plates are arranged in an aligned manner, channels being formed between the heat transfer plates. Two fluids of initially different temperatures can flow through each second channel to transfer heat from one fluid to the other, fluids which enter and exit the channels through inlet and outlet port holes in the heat transfer plates.
    [003] Typically, a heat transfer plate comprises two end areas and an intermediate heat transfer area. The end areas comprise the entry and exit port holes and a distribution area pressed with a pattern of projections and depressions, such as projections and valleys, in relation to a reference plane of the heat transfer plate. Similarly, the heat transfer area is pressed with a pattern of heat transfer from projections and depressions, such as ridges and valleys, in relation to said reference plane. The projections of the distribution and heat transfer patterns of one heat transfer plate are arranged to contact, in contact areas, the distribution valleys and heat transfer patterns of another, adjacent, heat transfer plate in a exchanger plate heat. The main task of the heat transfer plate distribution area is to spread a fluid that enters the channel across the width of the heat transfer plate before the fluid reaches the heat transfer area, and to collect and guide the fluid out of the channel after passing the heat transfer area. On the contrary, the main task of the heat transfer area is heat transfer.
    [004] As the distribution area and the heat transfer area have different main tasks, the distribution pattern usually differs from the heat transfer pattern. The distribution pattern is such that it offers relatively low flow resistance and a low pressure drop is typically associated with a more "open" distribution pattern design, such as a so-called chocolate pattern, offering relatively few, but large, contact areas between adjacent heat transfer plates. The heat transfer pattern is such that it offers relatively large flow resistance and high pressure drop which is typically associated with a more “dense” heat transfer pattern design, such as a so-called zigzag pattern, offering more, but smaller, contact areas between adjacent heat transfer plates.
    [005] The locations and density of the contact areas between two adjacent heat transfer plates are dependent, not only on the distance between, but also in the direction of, the ridges and valleys of both heat transfer plates. As an example, if the patterns of the two heat transfer plates are similar, but mirrored inverted, as shown in Fig. 1 where the solid lines correspond with the protrusions of the bottom heat transfer plate and the dotted lines correspond with the valleys of the top heat transfer plate, then the contact areas between the heat transfer plates (cross points) will be located in imaginary equidistant straight lines (dashed - dotted) that are perpendicular to a longitudinal central axis L of the heat transfer plates. On the contrary, as shown in Fig. 1b, if the protrusions of the bottom heat transfer plate are less "steep" than the valleys of the top heat transfer plate, the contact areas between the transfer plates instead of heat they will be located on imaginary equidistant straight lines that are not perpendicular to the longitudinal central axis. As another example, a shorter distance between the ridges and valleys corresponds with more contact areas. As a final example, illustrated in Fig. 1c, “steeper” ridges and valleys correspond with a greater distance between imaginary equidistant straight lines and a shorter distance between contact areas arranged in the same imaginary equidistant straight line.
    [006] In the transition between the distribution area and the heat transfer area, that is, where the plate pattern changes, the resistance of the heat transfer plate can be reduced in some way compared to the resistance of the rest of the plate. board. Additionally, the more spread out the contact areas are in the transition, the worse the resistance can be. Consequently, similar, but inverted mirrored patterns of two adjacent dense, accented, protruding heat transfer plates typically involve a greater transition than different patterns with less dense, less accentuated protrusions and valleys.
    [007] A plate heat exchanger can comprise one or more different types of heat transfer plates depending on its application. Typically, the difference between the types of heat transfer plates is in the design of their heat transfer areas, the rest of the heat transfer plates being essentially similar. As an example, there may be two different types of heat transfer plates, one with an “enhanced” heat transfer pattern, a so-called low theta pattern, which is typically associated with a relatively low heat transfer capacity, and one with a less "pronounced" heat transfer pattern, a so-called high theta pattern, which is typically associated with a relatively high heat transfer capacity. A set of plates containing only low theta heat transfer plates will be relatively strong since it is associated with a maximum number of contact areas arranged at the same distance from the transition between the distribution and heat transfer areas. On the other hand, a set of plates containing high theta and low theta heat transfer plates arranged alternately will be relatively weak since it is associated with a smaller number of contact areas arranged at the same distance from the transition.
    [008] The above problem is further described in the Swedish patent of depositor SE 528879 which is incorporated herein by reference and which also discloses a solution to this problem. The solution involves providing a narrow band between the distribution and heat transfer areas of the heat transfer plates regardless of the type of plate. The narrow band is provided with a zigzag pattern, more particularly projections and “accentuated” valleys arranged in a dense manner. In this way, the transition to the distribution area will be the same and relatively strong regardless of what types of heat transfer plates the plate set contains.
    [009] However, even if the above narrow band resolves the resistance problem in the transition to the distribution area, it occupies valuable surface area of the heat transfer plates without being associated with any effective fluid distribution due to the density of the overhangs and valleys, or effective heat transfer due to how sharp the overhangs and valleys are. More particularly, the heat transfer capacity of the narrow band is relatively low compared to the heat transfer capacity of a heat transfer surface of a high theta heat transfer plate. However, the heat transfer capabilities of the narrow band and the heat transfer surface of a low theta heat transfer plate can be almost the same. SUMMARY
    [0010] An object of the present invention is to provide a heat transfer plate with a relatively strong transition to the distribution area as well as a more effective use of the heat transfer surface plate area compared to the prior art. The basic concept of the invention is to provide a transition area between the distribution area and the heat transfer area of the heat transfer plate, a transition area which is pressed with a pattern of projections and depressions that differ from one another. Another object of the present invention is to provide a plate heat exchanger comprising such a heat transfer plate. The heat transfer plate and the plate heat exchanger to achieve the above objectives are defined in the attached claims and discussed below.
    [0011] A heat transfer plate according to the present invention has a central extension plane and comprises a first end area, a heat transfer area and a second end area arranged in succession along a central axis longitudinal direction of the heat transfer plate. The central longitudinal axis divides the heat transfer plate into a first half and a second half delimited by a first long side and a second long side, respectively. The first end area comprises an entrance port hole arranged within the first half of the heat transfer plate, a distribution area and a transition area. The transition area adjacent to the distribution area along a first boundary line and the heat transfer area along a second boundary line. The distribution area has a distribution pattern of distribution projections and distribution depressions in relation to the central extension plan, the transition area has a transition pattern of transition projections and transition depressions in relation to the central extension plan and the heat transfer area has a heat transfer pattern of heat transfer projections and heat transfer dips in relation to the central extension plane. The transition pattern differs from the distribution pattern and the heat transfer pattern. In addition, the transition projections comprise transition contact areas arranged for contact with another heat transfer plate. An imaginary straight line extends between two end points of each transition projection at an angle to the longitudinal central axis. The heat transfer plate is characterized by the fact that the angle is varying between the transition projections and increasing in one direction from the first long side to the second long side.
    [0012] The central longitudinal axis is parallel to the central extension plane.
    [0013] Heat transfer plates are generally essentially rectangular. So, the first and second long sides are essentially parallel to each other and to the longitudinal central axis.
    [0014] Transition projections (and transition depressions) can have any shape, such as a straight or curved shape or a combination of them, and they may or may not have different shapes compared to each other. In the case of a straight transition projection, the corresponding imaginary straight line will extend along the complete transition projection. This may not be the case for a non-straight transition projection.
    [0015] All transition projections can be associated with different angles, or some, but not all, transition projections can be associated with the same angle, as much as the angle of a transition projection closer to the second long side does is less than the angle of a transition projection closest to the first long side.
    [0016] As described by way of introduction, a main task of the distribution area is to take a fluid from the entrance port orifice towards the heat transfer area, and thus the transition area, and spread the fluid the width of the heat transfer plate. In this way, the angle of the transition projections increases with the distance to the heat transfer plate entrance port hole, also the transition area will contribute considerably to the spread of the fluid through the heat transfer plate, especially the spreading of the fluid from the outside, arranged along the second long side, the second half of the heat transfer plate. In addition, such an increasing angle of transition projections is also associated with an increased heat transfer capacity.
    [0017] The first boundary line of the heat transfer plate, that is, the boundary between the distribution and transition areas, may be non-linear. In this way, the folding resistance of the heat transfer plate can be increased compared to when the first boundary line was straight in the case where the first boundary line can serve as a folding line of the heat transfer plate.
    [0018] Additionally, the first boundary line can be non-linear in many different ways. According to one embodiment of the present invention, the first boundary line is arched and convex if viewed from the heat transfer area. Such a first convex boundary line is longer than a corresponding first straight boundary line which may result in a greater "exit" from the discharge area which in turn contributes to the distribution of the fluid across the width of the heat transfer plate. .
    [0019] In this way, the distribution area can be smaller with maintained distribution efficiency.
    [0020] The distribution pattern can be such that distribution projections are arranged in projection sets and distribution depressions are arranged as depression sets. In addition, the distribution projections for each projection set are arranged along a respective imaginary projection line extending from a respective first distribution projection to the first boundary line. Similarly, the distribution depressions of each set of depression are arranged along a respective line of imaginary depression extending from a respective first distribution depression to the first boundary line. A front main flow path through the distribution area is defined by two adjacent projection lines and a rear rear main flow path through the distribution area is defined by two adjacent depression lines. In addition, the distribution pattern can be such that the projection lines cross the depression lines at crossing points to form a grid. An example of a pattern with the above construction is the so-called chocolate pattern which is a well-known and effective distribution pattern.
    [0021] The crossing point of each projection line that is closest to the first boundary line can be arranged in an imaginary connecting line, which is parallel to the first boundary line. This arrangement means that the distance between each outermost crossing point of the grid and the first boundary line is the same that is advantageous with the resistance of the heat transfer plate. The connection line above can even coincide with the first boundary line which can result in an optimization of the resistance of the heat transfer plate.
    [0022] The transition pattern of the heat transfer plate may be such that an imaginary extension line extending along each transition projection is similar to a respective part of a third boundary line that delimits the distribution areas and transition and extends parallel to a longer projection line and additionally through a respective end point of the first and second boundary lines.
    [0023] Additionally, each of the rest of the projection lines can also be similar with a respective part of the said longest projection lines. According to these modalities, the transition pattern can be adapted to the distribution pattern, in which the transition projections can be formed as "elongations" of the projection lines of the distribution pattern. In this way, a “smooth” transition between the distribution and transition areas is allowed. Such a "smooth" transition is associated with a small pressure drop that is beneficial from a fluid distribution point of view. More particularly, it allows for a more efficient distribution of the fluid over the width of the heat transfer plate, especially the external part, arranged along the second long side of the second half of the heat transfer plate.
    [0024] The heat transfer plate of the invention can be constructed such that a first distance between two adjacent of the transition projections is less than a second distance between two adjacent of the projection lines of the distribution area. Consequently, the surface widening, and thus the heat transfer capacity, may be greater within the transition area than within the distribution area. In addition, as explained by way of introduction, more densely arranged transition projections are associated with more densely arranged contact areas between two adjacent heat transfer plates which is beneficial for the strength of the heat transfer plates.
    [0025] According to a modality of the heat transfer plate, the transition pattern is such that the transition contact area of each transition projection that is closest to the first boundary line is arranged in an imaginary contact line , contact line which is parallel to the first boundary line. This arrangement means that the distance between each outermost transition contact area and the first boundary line is the same width is advantageous for the resistance of the heat transfer plate.
    [0026] Just like the first boundary line of the heat transfer plate, the second boundary line, that is, the boundary between the transition and heat transfer areas, can be non-linear, for example, arched and convex observed from the heat transfer area, resulting in the same advantages.
    [0027] The plate heat exchanger according to the present invention comprises a heat transfer plate as described above.
    [0028] More other objectives, functionalities, aspects and advantages of the invention will emerge from the following detailed description as well as from the drawings. BRIEF DESCRIPTION OF THE DRAWINGS
    [0029] The invention will now be described in greater detail with reference to the attached schematic drawings, in which
    [0030] Fig. 1 a - 1 c illustrates areas of contact between different pairs of heat transfer patterns plate,
    [0031] Fig. 2 is a front view of a plate heat exchanger,
    [0032] Fig. 3 is a side view of the plate heat exchanger of Fig. 2,
    [0033] Fig. 4 is a plan view of a heat transfer plate,
    [0034] Fig. 5 is an enlargement of a part of the heat transfer plate of Fig. 4,
    [0035] Fig. 6 comprises an enlargement of a portion of the heat transfer plate part of Fig. 5 and schematically illustrates contact areas of a section of the heat transfer plate,
    [0036] Fig. 7 is a schematic cross section of distribution projections of a heat transfer plate distribution pattern,
    [0037] Fig. 8 is a schematic cross section of distribution depressions in the distribution pattern of the heat transfer plate,
    [0038] Fig. 9 is a schematic cross section of transition projections and transition depressions of a heat transfer plate transition pattern, and
    [0039] Fig. 10 is a schematic cross section of heat transfer projections and heat transfer dips from a heat transfer pattern of the heat transfer plate. DETAILED DESCRIPTION
    [0040] With reference to Figs. 2 and 3, a sealed plate heat exchanger 2 is shown. It comprises a first end plate 4, a second end plate 6 and a number of heat transfer plates arranged between the first and second end plates 4 and 6, respectively. The heat transfer plates are of two different types. One type has a medium theta heat transfer pattern, while the other has a high theta heat transfer pattern, types that are otherwise essentially similar. One of the heat transfer plates with a medium theta heat transfer pattern, denoted 8, is illustrated in further detail in Fig. 4. The different heat transfer plates are arranged alternately in a set of plates 9 with a front side (shown in Fig. 4) of a heat transfer plate that faces the back side of a neighboring heat transfer plate. Every second heat transfer plate is rotated 180 degrees, relative to a reference orientation (shown in Fig. 4), in a normal direction from the plane of the figure in Fig. 4.
    [0041] The heat transfer plates are separated by gaskets (not shown). The heat transfer plates together with the gaskets form parallel channels arranged to receive two fluids to transfer heat from one fluid to the other. To this end, a first fluid is arranged to flow through each second channel and a second fluid is arranged to flow through the remaining channels. The first fluid enters and leaves the plate heat exchanger 2 through inlet 10 and outlet 12, respectively. Similarly, the second fluid enters and leaves the plate heat exchanger 2 through inlet 14 and outlet 16, respectively. The above inputs and outputs will not be described in detail here. Instead, reference is made to the applicant's copending patent application "Heat Exchanger Plate and Plate Heat Exchanger comprising such a Heat Exchanger Plate", filed on the same date as the present application and incorporated here. For the channels to be waterproof, the heat transfer plates must be pressed against each other while the gaskets seal between the heat transfer plates. To this end, the plate heat exchanger 2 comprises a number of fixing means 18 arranged to press the first and second end plates 4 and 6, respectively, towards each other.
    [0042] The heat transfer plate 8 will now be described further with reference to Figs. 4, 5 and 6 illustrating the complete heat transfer plate, a part A of the heat transfer plate and a portion C of the heat transfer plate part A, respectively, and Figs. 7, 8, 9 and 10 which illustrate cross sections of projections and depressions of the heat transfer plate. The heat transfer plate 8 is an essentially rectangular stainless steel blade. It has a central extension plane c-c (see Fig. 3) parallel to the figure plane of Figs. 4, 5 and 6, and to a central longitudinal axis y of the heat transfer plate 8. The central longitudinal axis y divides the heat transfer plate 8 into a first half 20 and a second half 22 having a first long side 24 and a second long side 26, respectively. The heat transfer plate 8 comprises a first end area 28, a second end area 30 and a heat transfer area 32 arranged between them. In turn, the first end area 28 comprises an inlet port 34 for the first fluid and an outlet port 36 for the second fluid arranged for communication with inlet 10 and outlet 16, respectively, of the plate heat exchanger 2. Similarly, in turn, the second end area 30 comprises an inlet port 38 for the second fluid and an outlet port 40 for the first fluid arranged for communication with the inlet 14 and the outlet 12, respectively, of the plate heat exchanger 2. Hereinafter, only the first of the first and second end areas will be described since the structures of the first and second end areas are the same but are mirrored inverted with respect to a transverse central axis x.
    [0043] The first end area 28 comprises a distribution area 42 and a transition area 44. A first boundary line 46 separates the distribution and transition areas and the transition area 44 borders the transfer area. heat 32 along a second boundary line 48. The third and fourth boundary lines 50 and 52, respectively, which extend from a connection point 54 to a respective end point 56 and 58 of the second border line 48 through a respective end point 60 and 62 of the first boundary line 46, delimit the distribution area 42 and the transition area 44 from the rest of the first end area 28. The distribution area extends from the first border line 46 between the entrance and exit port holes 34 and 36, respectively. The first and second boundary lines 46 and 48, respectively, are both concave from the distribution area 42. However, the first boundary line 46 has a more acute curvature than the second boundary line 48 resulting in a transition area 44 with a variable width.
    [0044] The distribution area 42 is pressed with a distribution pattern of elongated distribution projections 64 (solid quadrilaterals) and distribution depressions 66 (dashed quadrilaterals) in relation to the central dc extension plane, see Fig. 6. Only some of these projections of distribution and depressions are illustrated in the figures. Distribution projections 64 are divided into a number of projection sets, and distribution projections for each projection set are arranged along a respective imaginary projection line 68 extending from the first distribution projection 70 of the defined projection for the first boundary line 46. Fig. 7 illustrates the cross section of the distribution projections 64 taken essentially perpendicular to the respective imaginary projection lines 68. The longest of the projection lines 68 is the one closest to the exit port hole 36 and is denoted 72. The rest of the projection lines are all similar with a respective part of the longest projection line 72, part of which extends from an end point 74 of the longest projection line. Thus, all projection lines 68 are parallel. Also the third boundary line 50 is parallel to the projection lines 68.
    [0045] Similarly, the distribution depressions 66 are divided into a number of depression sets, and the distribution depressions of each depression set are arranged along a respective imaginary depression line 76 extending from the first depression of distribution 78 of the depression defined for the first boundary line 46. Fig. 8 illustrates the cross section of the distribution depressions 66 taken essentially perpendicular to the respective imaginary depression line 76. The longest of the depression lines 76 is the closest to the entry port hole 34 and is denoted 80. The rest of the depression lines are all similar with a respective part of the longest depression line 80, part of which extends from an end point 82 of the longest depression line . Thus, all depression lines 76 are parallel. Also the fourth boundary line 52 is parallel to the depression lines 76. The longest depression line 80 and the longest projection line 72 are similar but mirrored inverted with respect to the longitudinal central axis y.
    [0046] The imaginary projection lines 68 of the distribution projections 64 cross the imaginary depression lines 76 of the distribution depressions 66 at crossing points 71 to form a grid 73. The crossing point of each projection line 68 that is further near the first boundary line 46 is denoted 75 and arranged in an imaginary connecting line 77 (illustrated dotted only in Fig. 6). The connecting line 77 is parallel to the first boundary line 46. As discussed earlier, this contributes to a high resistance of the heat transfer plate 8 in the transition between the distribution and transition areas 42 and 44, respectively. The distribution projections 64 of the heat transfer plate 8 are arranged to contact, along its entire length, respective distribution depressions within the second end area of a suspended heat transfer plate while the distribution depressions 66 are arranged to contact, along its entire length, respective distribution projections within the second end area of an underlying heat transfer plate. The distribution pattern is a so-called chocolate pattern.
    [0047] The transition area 44 is pressed with a transition pattern of alternately arranged transition projections 84 and transition depressions 86 (Fig. 9) in the form of ridges and valleys, respectively, in relation to the central extension plane cc, overhangs and valleys that all extend from the second boundary line 48. In Fig. 4, the tops of these overhangs are illustrated with imaginary extension lines 88 while the bottoms of these valleys (but only a few of them) are illustrated with extension lines imaginary 90. In Figs. 5 and 6, for the sake of clarity, only the imaginary extension lines 88 of the projections or transition projections 84 are illustrated. Fig. 9 illustrates the cross section of the transition projections 84 and the transition depressions 86 taken essentially perpendicular to the respective imaginary extension lines 88 and 90. Each of the extension lines 88 and 90 is similar to a respective part of the third line. boundary 50. More particularly, an extension line close to the first long side 24 of the heat transfer plate 8 is similar to an upper portion of the third boundary line 50 while an extension line close to the second long side 26 is similar to a lower portion of the third boundary line, and an extension line in the center of the heat transfer plate is similar to a central portion of the third boundary line. Thus, the transition pattern is adapted to the distribution pattern which results in a relatively smooth transition between the distribution area 42 and the transition area 44 which in turn is beneficial to the distribution of the fluid through the heat transfer plate.
    [0048] The third boundary line 50 comprises straight portions as well as curved portions which also means that extension lines 88 and 90, and thus transition projections 84 and transition depressions 86, will comprise straight portions as well as portions curved. In addition, the transition pattern is "divergent" meaning that the transition projections 84, and also the transition depressions 86, are not parallel. More particularly, an angle a between the longitudinal central axis y and an imaginary straight line 92, which extends between two end points 94 and 96 of each transition projection 84 and the transition depression 86 (illustrated for two of the transition projections in Fig 4), varies between the transition projections and depressions and increases in one direction from the first long side 24 to a second long side 26 of the heat transfer plate 8. In other words, the transition projections 84 and depression of transition 86 are more pronounced near the first long side than near the second long side. As explained earlier, this is beneficial for the distribution of the fluid across the heat transfer plate.
    [0049] Transition projections 84 comprise transition contact areas essentially shaped with a 98 point arranged for engagement with respective transition contact areas shaped with a transition depression tip within the second end area of a heat transfer plate suspended. This is illustrated in Fig. 6 where the bottom of these suspended transition depressions was illustrated with imaginary extension lines 100. It should be noted that Fig. 6 does not illustrate the engagement with the suspended heat transfer plate outside the transition areas and heat transfer. Similarly, the transition depressions 86 comprise transition contact areas essentially shaped with tips arranged for engagement with respective transition contact areas shaped with transition projection tips within the second end area of an underlying heat transfer plate ( not illustrated). The transition pattern is a so-called zigzag pattern.
    [0050] The transition contact area of each transition projection 84 that is closest to the first boundary line 46 is denoted 102 and arranged in an imaginary contact line 104 (illustrated dashed - dotted only in Fig. 6) parallel to the first boundary line 46. As discussed earlier, this contributes to a high resistance of the heat transfer plate 8 in the transition between the distribution and transition areas 42 and 44, respectively.
    [0051] Heat transfer area 32 is divided into a number of heat transfer subareas arranged in succession along the central longitudinal axis y of the heat transfer plate 8. A heat transfer subarea 106 adjacent to the heat transfer area transition 44 along the second boundary line 48 and a heat transfer subarea 108 along a fifth boundary line 110. The second and fifth boundary lines are similar but mirrored inverted with respect to an axis parallel to the central axis transversal x. Thus, the fifth boundary line 110 is convex seen from the transition area 44. In line with what was discussed earlier, this contributes to a high resistance of the heat transfer plate 8 in the transition between the heat transfer subareas 106 and 108, respectively. As noted in Fig. 4, similar arched boundary lines can also be found among the other heat transfer subareas.
    [0052] The sub-areas of heat transfer are of two different types that are arranged alternately. Hereinafter, heat transfer subarea 106 will be described with reference to Figs. 4, 5, 6 and 10. It is pressed with a heat transfer pattern of straight heat transfer projections arranged in an essentially alternating manner 112 and heat transfer depressions 114 in the form of ridges and valleys, respectively, in relation to the central extension plan cc. The heat transfer pattern of the first half 20 of the heat transfer plate and the heat transfer pattern of the second half 22 of the heat transfer plate 8 are similar but mirrored inverted with respect to the longitudinal central axis y. Additionally, the projections of heat transfer and depressions within the first half 20 are parallel meaning that also the projections of heat transfer and depressions within the second half 22 are parallel. In Figs. 4, 5 and 6 the tops of the heat transfer projections 112 are illustrated (backgrounds not shown) with imaginary extension lines 117. Fig. 10 illustrates the cross section of the heat transfer projections 112 and the heat transfer dips 114 taken perpendicular to the respective extension lines 117.
    [0053] The heat transfer projections 112 comprise heat transfer contact areas formed essentially with tip 118 arranged for engagement with respective heat transfer contact areas with heat transfer dips of a heat transfer plate suspended heat. This is illustrated in Fig. 6 where the bottom of these suspended heat transfer depressions has been illustrated with imaginary extension lines 120. As explained by way of introduction, how the heat transfer plate 8 has a theta heat transfer pattern medium while the suspended heat transfer plate has a high theta heat transfer pattern, the contact areas between the two heat transfer plates will be arranged along imaginary parallel straight lines 122 that are not perpendicular to the central axis longitudinal y of the heat transfer plate 8. Thus, if the heat transfer plates were not provided with the transition areas, the resistance of the heat transfer plates in the transition to the distribution area was relatively low. Similarly, the heat transfer depressions 114 comprise substantially pointed tip shaped heat transfer contact areas arranged for engagement with respective tipped heat transfer contact areas of the heat transfer projections of an underlying heat transfer plate (not shown). The heat transfer pattern is a so-called zigzag pattern.
    [0054] As apparent from the figures and especially Fig. 6, a first distance dl between two adjacent transition projections 84 (or transition depressions 86) within transition area 44 is less than a second distance d2 between two adjacent projection lines 68 (or depression lines 76) within the distribution area 42. As stated earlier, this means that the heat transfer capacity is greater within the transition area 44 than within the distribution area 42.
    [0055] As explained above, the plate heat exchanger 2 is arranged to receive two fluids to transfer heat from one fluid to the other. Referring to Fig. 4 and the heat transfer plate 8, the first fluid flows through the inlet port hole 34 to the rear (visible) side of the heat transfer plate 8, along a flow from the back side through the distribution and transition areas of the first end area, the heat transfer area and the transition and distribution areas of the second end area and back through the exit port hole 40. One main rear-side flow path through the distribution areas is defined by two adjacent imaginary depression lines. Similarly, the second fluid flows through an inlet port of an overhead heat transfer plate, inlet port which is aligned with the inlet port 38 of heat transfer plate 8, to the front side of the heat transfer plate 8. Then, the second fluid flows along a front side flow path through the distribution and transition areas of the second end area, the heat transfer area and the transition and distribution areas of the first end and back area through an outlet port hole of the suspended heat transfer plate, outlet port hole which is aligned with the outlet port hole 36 of the heat transfer plate 8. A main flow path from the front side through the distribution areas is defined by the two adjacent imaginary projection lines.
    [0056] The embodiment of the present invention described above should be seen as an example only. One skilled in the art realizes that the modality discussed can be varied and combined in a number of ways without departing from the inventive concept.
    [0057] As an example, the distribution specified above, transition and heat transfer patterns are exemplary only. Naturally, the invention is applicable in conjunction with other types of standards. As an example, the projection lines, like the depression lines, of the distribution pattern do not need to be parallel but may differ from each other. In addition, the third and fourth boundary lines delimiting the distribution and transition areas need not be similar to each other or parallel to the projection and depression lines, respectively. In addition, the first boundary line between the distribution area and the transition area can coincide with the connecting line where the outermost crossing points of the distribution pattern are arranged.
    [0058] In the modality described above, the curvature of the first boundary line is determined by the locations of the imaginary crossing points of the distribution pattern. On the contrary, the curvature of the second boundary line is determined by the boundary lines between the heat transfer subareas. The latter should allow pressing of the heat transfer plate with a modular tool that is used to manufacture heat transfer plates of different sizes containing different numbers of heat transfer sub-areas by adding / removing the heat transfer sub-areas adjacent to the transition areas. Of course, according to an alternative modality, the first and second boundary lines can instead be parallel. Additionally, the second boundary line can also be adapted to the locations of the contact areas within the transition and / or heat transfer patterns for increased resistance of the heat transfer plate.
    [0059] Additionally, all or part of the first and second boundary lines and the boundary lines that separate the heat transfer sub-areas may have a different shape than a curved one, such as a wave shape, a saw shape toothed or a straight shape.
    [0060] The plate heat exchanger described above is of the parallel counterflow type, that is, the inlet and outlet for each fluid are arranged in the same half of the plate heat exchanger and the fluids flow in opposite directions through the channels between the heat transfer plates. Of course, the plate heat exchanger can instead be of the diagonal flow type and / or a concurrent flow type.
    [0061] Two different types of heat transfer plates are included in the plate heat exchanger above. Of course, the plate heat exchanger may alternatively comprise just one type of plate or more than two different types of plate. Additionally, the heat transfer plates can be made of materials other than stainless steel.
    [0062] Finally, the present invention can be used in conjunction with other types of plate heat exchangers than those with gaskets, such as plate heat exchangers comprising permanently bonded heat transfer plates.
    [0063] It should be noted that the term "contact area" is used here both to specify the areas of a single heat transfer plate that engages with another heat transfer plate, and the areas of mutual engagement between two adjacent plates heat transfer.
    [0064] It should be noted that a description of the details is not relevant to the present invention has been omitted and that the figures are only schematic and are not drawn according to the scale. It must also be said that some of the figures have been simplified more than others. Therefore, some components can be illustrated in one figure but left out in another figure.
    权利要求:
    Claims (14)
    [0001]
    1. Heat transfer plate (8) having a central extension plane (cc) and comprising a first end area (28), a heat transfer area (32) and a second end area (30) arranged in succession along a central longitudinal axis (y) of the heat transfer plate, central longitudinal axis which divides the heat transfer plate into a first half and a second half (20, 22) bounded by a first long side and a second long side (24, 26), respectively, the first end area comprising an entrance port hole (34) arranged within the first half of the heat transfer plate, a distribution area (42) and an area of transition area (44), the transition area adjacent to the distribution area along a first boundary line (46) and the heat transfer area along a second border line (48), the distribution area having a projection distribution pattern distribution s (64) and distribution depressions (66) in relation to the central extension plane, the transition area having a transition pattern of transition projections (84) and transition depressions (86) in relation to the extension plane center and the heat transfer area having a heat transfer pattern of heat transfer projections (112) and heat transfer dips (114) in relation to the central extension plane, the transition pattern differing from the distribution pattern and the heat transfer pattern, the transition projections comprising transition contact areas (98) arranged for contact with another heat transfer plate, and an imaginary straight line (92) extending between two end points (94, 96) of each transition projection with an angle (a) in relation to the longitudinal central axis measured in a first direction, which is clockwise or counterclockwise in relation to the longitudinal central axis, characterized by fa that the angle is less than 90 ° measured in said first direction from the central longitudinal axis and that the angle is varying between the transition projections and increasing in a direction from the first long side to the second long side.
    [0002]
    2. Heat transfer plate (8) according to the previous claim, characterized by the fact that the first boundary line (46) is non-linear.
    [0003]
    3. Heat transfer plate (8) according to any of the preceding claims, characterized by the fact that the first boundary line (46) is arched and convex if viewed from the heat transfer area (32).
    [0004]
    4. Heat transfer plate (8) according to any one of the preceding claims, characterized by the fact that the distribution projections (64) are arranged in projection sets and the distribution depressions (66) are arranged in a depression set , the distribution projections for each projection set that are arranged along a respective imaginary projection line (68) extending from a respective first distribution projection (70) to the first boundary line (46), and the distribution depressions of each depression set that are arranged along a respective imaginary depression line (76) extending from a respective first distribution depression (78) to the first boundary line, a main flow path front side through the distribution area being defined by two adjacent projection lines and a main rear side distribution area being defined by two adjacent depression lines.
    [0005]
    5. Heat transfer plate (8) according to claim 4, characterized by the fact that the projection lines (68) cross the depression lines (76) at crossing points (71) to form a grid (73) .
    [0006]
    6. Heat transfer plate (8) according to claim 5, characterized in that the crossing point (75) of each projection line (68) that is closest to the first boundary line (46) is arranged in an imaginary connecting line (77), connecting line which is parallel to the first boundary line (46).
    [0007]
    7. Heat transfer plate (8) according to claim 6, characterized by the fact that the imaginary connecting line (77) coincides with the first boundary line (46).
    [0008]
    Heat transfer plate (8) according to any one of claims 4 to 7, characterized in that an imaginary extension line (88) extending along each transition projection (84) is similar to one respective part of a third boundary line (50) delimiting the distribution area (42) and the transition area (44) and extending parallel to a longer one (72) of the projection lines (68) and additionally through a respective end point (60. 56) of the first and second boundary lines (46, 48).
    [0009]
    Heat transfer plate (8) according to claim 8, characterized in that each of the rest of the projection lines (68) is similar to a respective part of the said longest (72) of the projection lines .
    [0010]
    10. Heat transfer plate (8) according to any one of claims 4 to 9, characterized in that a first distance (dl) between two adjacent transition projections (84) is less than a second distance ( d2) between two adjacent projection lines (68) of the distribution area (42).
    [0011]
    11. Heat transfer plate (8) according to any one of the preceding claims, characterized by the fact that the transition contact area (98) of each transition projection (84) which is closest to the first boundary line (46) is arranged in an imaginary contact line (104), an imaginary contact line which is parallel to the first boundary line.
    [0012]
    12. Heat transfer plate (8) according to any one of the preceding claims, characterized by the fact that the second boundary line (48) is non-linear.
    [0013]
    13. Heat transfer plate (8) according to any one of the preceding claims, characterized by the fact that the second boundary line (48) is arched and convex if viewed from the heat transfer area (32).
    [0014]
    14. Plate heat exchanger (2), characterized by the fact that it comprises the heat transfer plate (8) as defined in any of the preceding claims.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112015008857B1|2020-10-27|heat transfer plate, e, plate heat exchanger
    BR112016028028B1|2021-05-11|heat transfer plate, and plate heat exchanger
    RU2715123C1|2020-02-25|Heat transfer plate and plate heat exchanger comprising plurality of such heat transfer plates
    BR112015008859B1|2020-10-13|plate heat exchanger, and plate heat exchanger
    SE534765C2|2011-12-13|Plate heat exchanger plate and plate heat exchanger
    BRPI0921060B1|2020-03-10|HEAT EXCHANGER PLATE, AND, HEAT EXCHANGER
    ES2864498T3|2021-10-13|Heat transfer plate and heat exchanger comprising a plurality of such heat transfer plates
    SE411952B|1980-02-11|HEAT EXCHANGER INCLUDING A MULTIPLE IN A STATUE INSERTED SWITCHING PLATE
    BR112020024192A2|2021-03-02|heat transfer plate and gasket.
    BR112021007856B1|2022-02-08|HEAT TRANSFER PLATE
    BR112021007856A2|2021-08-03|heat transfer plate
    BR112021006971A2|2021-07-13|heat transfer plate
    CN112912682B|2022-03-18|Heat transfer plate
    DE202007009900U1|2007-09-20|Heat sink with heat transport reinforcement structure
    同族专利:
    公开号 | 公开日
    ES2608584T3|2017-04-12|
    CN103791757A|2014-05-14|
    SI2728292T1|2017-01-31|
    DK2728292T3|2017-01-30|
    CN103791757B|2016-01-13|
    EP2728292B1|2016-10-12|
    LT2728292T|2016-12-12|
    US9739542B2|2017-08-22|
    EP2728292A1|2014-05-07|
    JP2015536437A|2015-12-21|
    US20150276319A1|2015-10-01|
    JP6166375B2|2017-07-19|
    AR093266A1|2015-05-27|
    PL2728292T3|2017-08-31|
    PT2728292T|2016-12-27|
    KR20170024164A|2017-03-06|
    RU2598982C1|2016-10-10|
    CA2885276C|2017-06-06|
    JP2017106719A|2017-06-15|
    KR102017959B1|2019-09-03|
    KR20150079855A|2015-07-08|
    AU2013339691A1|2015-05-28|
    HUE031509T2|2017-07-28|
    CA2885276A1|2014-05-08|
    CN203464823U|2014-03-05|
    WO2014067757A1|2014-05-08|
    AU2013339691B2|2016-04-21|
    BR112015008857A2|2017-07-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB1339542A|1970-03-20|1973-12-05|Apv Co Ltd|Plate heat exchangers|
    SE353954B|1971-02-19|1973-02-19|Alfa Laval Ab|
    SE418058B|1978-11-08|1981-05-04|Reheat Ab|PROCEDURE AND DEVICE FOR PATCHING OF HEAT EXCHANGER PLATE FOR PLATE HEAT EXCHANGER|
    SE458806B|1987-04-21|1989-05-08|Alfa Laval Thermal Ab|PLATE HEAT EXCHANGER WITH DIFFERENT FLOW RESISTANCE FOR MEDIA|
    SE466871B|1990-04-17|1992-04-13|Alfa Laval Thermal Ab|PLATFORMERS WITH CORRUGATED PLATES WHERE THE ORIENT'S ORIENTATION IS VARIABLE IN THE FLOW DIRECTION TO SUCCESSIVELY REDUCE THE FLOW RESISTANCE|
    JP3285243B2|1993-02-22|2002-05-27|株式会社日阪製作所|Plate heat exchanger|
    JP3543992B2|1994-03-28|2004-07-21|株式会社日阪製作所|Plate heat exchanger|
    JP3751331B2|1995-03-31|2006-03-01|株式会社日阪製作所|Plate structure of plate heat exchanger|
    JP3654949B2|1995-03-31|2005-06-02|株式会社日阪製作所|Plate structure of plate heat exchanger|
    JP3682324B2|1995-09-11|2005-08-10|株式会社日阪製作所|Plate heat exchanger|
    JP3650657B2|1995-09-26|2005-05-25|株式会社日阪製作所|Plate heat exchanger|
    IL123850D0|1998-03-26|1998-10-30|Seidel Pesach|Variable thermal length flat plate|
    US6180846B1|1998-09-08|2001-01-30|Uop Llc|Process and apparatus using plate arrangement for combustive reactant heating|
    JP2001099583A|1999-09-29|2001-04-13|Hisaka Works Ltd|Plate type heat exchanger|
    FI118391B|2001-12-27|2007-10-31|Vahterus Oy|Device for improving heat transfer in round plate heat exchangers|
    SE526831C2|2004-03-12|2005-11-08|Alfa Laval Corp Ab|Heat exchanger plate and plate package|
    SE528879C2|2005-07-04|2007-03-06|Alfa Laval Corp Ab|Heat exchanger plate, pair of two heat exchanger plates and plate package for plate heat exchanger|
    SE530012C2|2006-06-05|2008-02-12|Alfa Laval Corp Ab|Plate and gasket for plate heat exchanger|
    SE530011C2|2006-06-05|2008-02-05|Alfa Laval Corp Ab|Heat exchanger plate and plate heat exchanger|
    CN200968801Y|2006-11-09|2007-10-31|山东北辰集团华润换热设备有限公司|Heat exchange plate of Plate-type heat exchanger|
    SE534306C2|2008-06-17|2011-07-05|Alfa Laval Corp Ab|Heat exchanger plate and plate heat exchanger|
    CN201364067Y|2009-02-25|2009-12-16|山东宏达科技集团有限公司|Plate-type heat exchanger slab|
    SE534765C2|2010-04-21|2011-12-13|Alfa Laval Corp Ab|Plate heat exchanger plate and plate heat exchanger|
    DK2728293T3|2012-10-30|2017-02-27|Alfa Laval Corp Ab|HEAT EXCHANGER PLATE AND PLATE HEAT EXCHANGERS INCLUDING SUCH A HEAT EXCHANGE PLATE|
    ES2712645T3|2012-10-30|2019-05-14|Alfa Laval Corp Ab|Board and set|
    EP2728292B1|2012-10-30|2016-10-12|Alfa Laval Corporate AB|Heat transfer plate and plate heat exchanger comprising such a heat transfer plate|
    PT2762823T|2013-01-30|2017-10-03|Alfa Laval Corp Ab|Attachment means, gasket arrangement and assembly|ES2712645T3|2012-10-30|2019-05-14|Alfa Laval Corp Ab|Board and set|
    DK2728293T3|2012-10-30|2017-02-27|Alfa Laval Corp Ab|HEAT EXCHANGER PLATE AND PLATE HEAT EXCHANGERS INCLUDING SUCH A HEAT EXCHANGE PLATE|
    EP2728292B1|2012-10-30|2016-10-12|Alfa Laval Corporate AB|Heat transfer plate and plate heat exchanger comprising such a heat transfer plate|
    PT2762823T|2013-01-30|2017-10-03|Alfa Laval Corp Ab|Attachment means, gasket arrangement and assembly|
    TR201902746T4|2013-10-29|2019-03-21|Swep Int Ab|A method for brazing a plate heat exchanger using screen printed brazing material.|
    US10837717B2|2013-12-10|2020-11-17|Swep International Ab|Heat exchanger with improved flow|
    DE102014210800A1|2014-06-05|2015-12-17|Mahle International Gmbh|Heat exchanger|
    PT2957851T|2014-06-18|2017-07-14|Alfa Laval Corp Ab|Heat transfer plate and plate heat exchanger comprising such a heat transfer plate|
    PT2988085T|2014-08-22|2019-06-07|Alfa Laval Corp Ab|Heat transfer plate and plate heat exchanger|
    EP3396293A1|2017-04-26|2018-10-31|Alfa Laval Corporate AB|Heat transfer plate and heat exchanger comprising a plurality of such heat transfer plates|
    ES2813624T3|2017-10-05|2021-03-24|Alfa Laval Corp Ab|Heat transfer plate and a plate pack for a heat exchanger comprising a plurality of such heat transfer plates|
    DK3614087T3|2018-08-24|2021-03-08|Alfa Laval Corp Ab|HEAT TRANSFER PLATE AND CASSETTE FOR PLATE HEAT EXCHANGERS|
    ES2867976T3|2018-11-07|2021-10-21|Alfa Laval Corp Ab|Heat transfer plate|
    PL3657114T3|2018-11-26|2021-11-02|Alfa Laval Corporate Ab|Heat transfer plate|
    EP3660438B1|2018-11-29|2021-04-14|Alfa Laval Corporate AB|The present invention relates to a plate heat exchanger, a heat exchanging plate and a method of treating a feed such as sea water|
    EP3828489A1|2019-11-26|2021-06-02|Alfa Laval Corporate AB|Heat transfer plate|
    法律状态:
    2018-11-21| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-07-07| B09A| Decision: intention to grant|
    2020-10-27| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/10/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    EP12190493.2|2012-10-30|
    EP12190493.2A|EP2728292B1|2012-10-30|2012-10-30|Heat transfer plate and plate heat exchanger comprising such a heat transfer plate|
    PCT/EP2013/071149|WO2014067757A1|2012-10-30|2013-10-10|Heat transfer plate and plate heat exchanger comprising such a heat transfer plate|
    [返回顶部]