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    • 专利摘要:
    HEAT EXCHANGER PLATE, HEAT EXCHANGER HOUSING, HEAT EXCHANGER SET, AND METHOD FOR MAKING A HEAT EXCHANGER PLATE The invention relates to a heat exchanger plate (106) that has first surface portions (210 ) located along first plate edges (220) and comprising first contact regions 9214) and second portions of surfaces (212) located along second plate edges (222). The first surface portions (210) are folded to a first side producing a first partial fluid channel (230) and the second surface portions (212) are folded to a second side producing a second partial fluid channel (232). The first contact regions (214) define a plane (S). The heat exchanger plate (106) has portions of surfaces (224) which comprise first corner edge portions (226) and second corner edge portions (228). At least two corner surface portions (224) are bent in relation to the first partial fluid channel (230), such that their first corner edge portions (226) are in the plane (S) while their second corner edge portions (228) are perpendicular to the plane (S).
    公开号:BR112012014973B1
    申请号:R112012014973-3
    申请日:2010-12-17
    公开日:2020-12-01
    发明作者:Mircea Dinulescu
    申请人:Mircea Dinulescu；
    IPC主号:
    专利说明:

    [0001] [0001] The present invention relates to a heat exchanger plate for a heat exchanger hull and for a heat exchanger assembly. In addition, the invention relates to a method of making a heat exchanger plate. Foundation
    [0002] [0002] A conventional plate type heat exchanger generally consists of a plurality of heat exchanger plates, among which fluid streams with different temperatures are allowed to flow in a spatially separate manner. This makes it possible to recover heat energy through the heat exchanged between fluids.
    [0003] [0003] From European Patent Document EP 1,842,616, a method for making a plate type heat exchanger is known. The resulting heat exchanger comprises a plurality of stacked heat exchanger plates, formed from rectangular plate elements. Each heat exchanger plate has flanges formed on the periphery of the plate. The flanges comprise flat portions on two opposite edges of the plate, which are folded towards one side of the plate, and protruding portions on the remaining opposite edges of the plate which are folded towards the other side of the plate. Two heat exchanger plates are connected facing each other, with one plate positioned upside down. In an alternative way, the flat portions or protruding portions of adjacent plates constitute contact surfaces. In this way, space portions with openings are formed between the plates, allowing the fluids to exchange heat while flowing through these portions. It can be seen that for the heat exchanger plates combined in EP 1,842,616 a first space portion, or fluid channel, is formed having first fluid openings or channel openings with a hexagonal shape. A similar configuration of a heat exchanger with openings for hexagonal fluid channels is described in US Patent Document 2004/0080060.
    [0004] [0004] The disadvantage of known heat exchangers is that the corners of the fluid channels irregularly shaped in such a heat exchanger introduce unwanted obstructions to the fluid flowing into the sides of the channels for fluid which represents a source of turbulence and increased resistance to flow. In addition, the corner geometry is complex, requiring additional sealing items, and is expensive to manufacture. summary
    [0005] [0005] It is an objective to provide a heat exchanger plate in such a way that a pair of these plates can be combined in a heat exchanger hull with a channel opening for fluid that has improved connectivity and reduced turbulence properties.
    [0006] [0006] According to one aspect, a heat exchanger plate formed of a quadrilateral plate is provided that has a pair of opposite first plate edges and a pair of second opposite plate edges, the heat exchanger plate having first surface portions, each along a first middle edge portion of a first plate edge, each first surface portion comprising a first contact region, the heat exchanger plate having second surface portions, each along of a second middle edge portion of a second plate edge, each second surface portion comprising a second contact region, whereby the first surface portions are folded to a first side of the quadrilateral plate, resulting in a first partial channel for fluid and the second surface portions are folded to a second side of the quadrilateral plate, resulting in a second partial channel for fluid, so the first The contact regions are coplanar, defining a plane, whereby the heat exchanger plate comprises portions of corner surface comprising a first portion of a corner edge and a second portion of a corner edge, in which at least two portions of corner surfaces are folded inwardly relative to the first partial channel for fluid, such that the respective first corner edge portions are in the plane, while the respective second corner edge portions are substantially perpendicular to the plane.
    [0007] [0007] In addition, and in accordance with another aspect of the invention, a method of making such a heat exchanger plate is provided.
    [0008] [0008] The "substantially perpendicular" quality of the respective second corner edge portions indicates that such second corner edge portion is oriented at a substantially 90 ° angle to the plane defined by the first coplanar contact regions.
    [0009] [0009] Advantageously, joining two such heat exchanger plates with corner surface portions folded into the interior of a heat exchanger hull, with an upside-down plate and the plates facing each other, a first fluid channel is formed having first fluid channel openings with a regular or even rectangular quadrilateral shape. A stack of such heat exchanger hulls produces a heat exchanger assembly with first and second channels for fluid, in which the first channel openings are shaped in a regular manner, representing an inlet for the flow of supplied fluid that is not obstructed and which can be easily adjusted to the fluid supply and discharge channels.
    [0010] [00010] According to one embodiment, the heat exchanger plate is formed from a rectangular plate that has a second partial fluid channel that is substantially perpendicular to the first partial fluid channel.
    [0011] [00011] The resulting heat exchanger plate, hull and assembly, are highly symmetrical and therefore easy to manufacture.
    [0012] [00012] According to another embodiment, at least one of the first surface portions comprises a first flange next to the corresponding first middle edge portion. This first flange includes the first contact region.
    [0013] [00013] According to another embodiment, at least a second portion of the surface comprises a second flange close to the second portion of the corresponding middle edge. This second flange includes the second contact region.
    [0014] [00014] These first and second contact regions of the first and second flanges have more substantial contact surfaces for connecting adjacent heat exchanger plates.
    [0015] [00015] According to another embodiment, a first flange portion of the first flange is bent in relation to the S plane.
    [0016] [00016] The provision of recessed flange portions results in a crack between the first contact surfaces of the heat exchanger plates located along these flange portions, presenting an accessible region for connecting and / or sealing the heat exchanger plates, for example, by brazing or welding.
    [0017] [00017] In another embodiment, the cross-section of at least one of the first and second partial channels for fluid varies over at least one of the first and second partial channels for fluid.
    [0018] [00018] By varying the cross sections of the channels along its length, it is possible to adjust the temperature distribution inside the heat exchanger, in order to improve the heat transfer performance between the heat exchanger fluids that flow through the channels.
    [0019] [00019] According to other aspects of the invention, a plate-type heat exchanger hull and a plate-type heat exchanger assembly are provided. The heat exchanger hull comprises a pair of heat exchanger plates as described above, in which the heat exchanger plates are connected along the first contact regions, the first partial channels for fluid from the respective heat exchanger plates forming a first channel for fluid. The plate-type heat exchanger assembly provided comprises a plurality of heat exchanger hulls as described above, in which heat exchanger hulls are connected along the second contact regions, such that one of the second partial channels for fluid from one first heat exchanger hull combines with one of the second partial fluid channels for a second heat exchanger hull for a second fluid channel. Brief description of the drawings
    [0020] [00020] Modalities will now be described by way of example only, with reference to the accompanying schematic drawings, in which corresponding reference symbols indicate corresponding parts, and in which: Figure 1 schematically shows a perspective view of a heat exchanger assembly.
    [0021] [00021] Figure 2A shows schematically a perspective view of a rectangular plate used to form a heat exchanger plate according to an embodiment.
    [0022] [00022] Figure 2B shows a perspective view of a modality of the heat exchanger plate with folded corner portions and edge surface portions.
    [0023] [00023] Figure 3A shows schematically a perspective view of a rectangular plate used to form a flanged heat exchanger plate according to another embodiment.
    [0024] [00024] Figure 3B shows a perspective view of another embodiment of the heat exchanger plate with folded corner surface portions and flanges.
    [0025] [00025] Figure 4 shows a cross-sectional perspective view of a stacked pair of heat exchanger hulls according to one modality.
    [0026] [00026] Figures 5A-5J show modalities of the heat exchanger plates with different curvatures of the first surface region and first flanges.
    [0027] [00027] Figure 6 shows a perspective view of a stacked pair of heat exchanger housings flanged according to an embodiment.
    [0028] [00028] Figure 7A shows schematically a perspective view of a quadrilateral plate used to form an asymmetric heat exchanger plate according to another embodiment.
    [0029] [00029] Figure 7B shows a perspective view of an asymmetric heat exchanger plate according to another embodiment.
    [0030] [00030] The figures are designed for illustrative purposes only, and do not serve as a restriction of scope or protection as described below by the claims. Detailed Description
    [0031] [00031] This invention relates to heat exchangers and a method of making heat exchanger plates that form a hull or heat exchanger assembly. Plate type heat exchangers can be formed from a plurality of heat exchanger plates having folded or turned surface portions. The folding or turning of surfaces should be interpreted here broadly, not only referring to a sharply defined crease along a line on this surface, but also to a more gradually curved surface region.
    [0032] [00032] We now turn to a more detailed discussion of the figures.
    [0033] [00033] Figure 1 schematically shows a perspective view of a heat exchanger assembly 102 composed of a plurality of heat exchanger plates 106. The heat exchanger assembly 102 shown in the figure has apparent rectangular symmetries. The individual heat exchanger plates 106, which can be formed from flat rectangular molds, are further explained with reference to figures 2 and 3. The heat exchanger plate 106 in figure 1 has rectangular symmetry when viewed from above. This is not required in general, since the heat exchanger plate 106 can be manufactured from a rectangular plate or a non-rectangular quadrilateral plate.
    [0034] [00034] Alternatively, the heat exchanger assembly 102 can be seen as being composed of heat exchanger hulls 104, which are formed from pairs of adjacent heat exchanger plates 106. The heat exchanger plates 106 are positioned in an encounter manner with one plate positioned upside down in relation to the other plate. The heat exchanger hull 104 can represent a separate article of manufacture, and is further explained with reference to figure 4.
    [0035] [00035] The heat exchanger assembly 102 shown in figure 1 is referred to as a cross flow plate type heat exchanger. The cross flow heat exchanger has fluid channel openings 112, 114 that form inlets and outlets for the fluid flows, and are alternately located on adjacent faces of the heat exchanger assembly 102. Inside the heat exchanger assembly heat exchange 102 has fluid channels 108, 110 that allow passage for fluids that exchange heat. Here, these fluid channels 108, 110 are arranged in a reciprocally cross configuration. In the configuration shown in figure 1, the heat exchanger assembly has first fluid channels 108 that are perpendicular to the second fluid channels 110, although other channel configurations are conceivable.
    [0036] [00036] In the embodiment shown in figure 1, the first channel openings for fluid 112 have a rectangular shape. The technique for obtaining first rectangular openings for fluid channel 112 provided here can be equally well applied to other known basic types of heat exchanger, which can be based on parallel or countercurrent flow principles. A parallel or countercurrent type flow construction has remote fluid channel inlets and outlets that belong to a single fluid channel that are located on the same face as the heat exchanger assembly. Alternatively, a type Z heat exchanger, flowing in parallel or countercurrent, has fluid channel inlets and outlets that belong to a single fluid channel, which are located in remote portions of opposite faces of the heat exchanger assembly. A description of these types of heat exchanger as such can, for example, be found in Patent Documents WO 92/09859 and WO 96/19708.
    [0037] [00037] Figure 2A shows schematically a perspective view of a rectangular plate 204 from which a modality of the heat exchanger plate 106 can be formed. The two opposite faces of the rectangular plate 204 define a first side 206 and a second side 208 of the plate. The circumference of the rectangular plate 204 consists of a pair of first opposite plate edges 220 and a pair of second opposite plate edges 222. Elongated surface flaps located next to the first and second middle edge portions 221, 223 of the rectangular plate 204 constitute first surface portions 210 and second surface portions 212.
    [0038] [00038] Figure 2A shows only a single second surface portion 212 and corresponding second plate edge 222, in correspondence with the folded heat exchanger plate 106 shown in figure 2B. It is understood that a second surface portion 212 and second plate edge 222 may also be present at the rear end of the rectangular plate 204 and heat exchanger plate 106 shown in figures 2A and 2B, respectively.
    [0039] [00039] Corner surface portions 224 are located in the remaining regions along the first and second plate edges 220, 222 that are close to the first and second surface portions 210, 212. The plate edge portions that limit a portion corner surface portions are referred to as a first corner edge portion 226 and a second corner edge portion 228, both being continuations of the first and second middle edge portions 221, 223, respectively.
    [0040] [00040] The remaining region of the rectangular plate not covered by the surface and / or corner portions 210, 212, 224, is referred to as the main surface portion 218.
    [0041] [00041] The heat exchanger plates 106 can be manufactured from sheet metal materials, for example, carbon steel or alloy steel, with sufficient ductility to allow for forming, as described. In order to have some margin while forming the heat exchanger plates 106, it is preferable that the construction material also allows a certain amount of irreversible deformation during the forming process. Materials commonly used in the manufacture of the plates can allow plastic deformations of up to 10% - 30%.
    [0042] [00042] Figure 2B shows a heat exchanger plate 106 which results from the folding of several surface portions of the rectangular plate 204. The heat exchanger plate 106 is formed by bending the first surface portions 210 towards the first side 206 of the rectangular plate 204. This folding will produce a first groove or first partial channel for fluid 230 on the first side 206 of the rectangular plate 204. This first partial channel for fluid 230 is limited by the main surface portion 218 and the first folded surface portions 210.
    [0043] [00043] In addition, the second surface portions 212 are folded to the second side 208 of the rectangular plate 204 producing a second groove or second partial channel for fluid 232 on the second side 208. This second partial channel for fluid 232 is limited by the portion main surface 208 and the second folded surface portions 212.
    [0044] [00044] Each first and second surface portion 210, 212 of a heat exchanger plate 106 has one of the corresponding first or second contact regions 214, 216 representing a line or surface flap suitable for joining with a contact region similar to a second heat exchanger plate. In the example shown in figure 2B, the heat exchanger plate 106 has first contact regions 214 that coincide with the respective first middle edge portions 221.
    [0045] [00045] A finished heat exchanger plate 106 has first contact regions 214 that are coplanar defining an S plane. This S plane establishes a reference as to which measures to obtain first regularly shaped fluid channel openings 112 can be clearly defined.
    [0046] [00046] The corner surface portions 224 of the finished heat exchanger plate 106 are folded inwardly relative to the first partial fluid channel 230, such that the first corner edge portions 226 are mainly in the S plane. There, second corner edge portions 228 on the finished heat exchanger plate 106 are substantially perpendicular to the S plane.
    [0047] [00047] The substantially perpendicular quality of the respective second corner edge portions 223 implies that the second corner edge portion 228 is oriented at a corner edge angle δ of approximately
    [0048] [00048] 90 ° with respect to the plane S defined by the first coplanar contact regions 214, that is, that the second corner edge portion 228 is parallel to a normal vector of the plane S. The perpendicular corner edge angle δ is shown in figure 2B.
    [0049] [00049] This perpendicular character is subject to manufacturing tolerances that can be in the range of 5 to 10%, but are preferably less than 5%.
    [0050] [00050] A dδ deviation from perpendicularity for a selected corner edge portion of a selected heat exchanger plate will require fabrication of an encounter heat exchanger plate that has an adjacent corner edge portion with a complementary offset from the normal so that the selected corner edge portion and the adjacent corner edge portion are in line and so that the first fluid channel opening 112 remains regular quadrilateral in shape. In other words, if the deviation dδ for the selected corner edge portion results in a corner edge angle dδ = 90 ° + dδ, then the adjacent corner edge angle is equal to
    [0051] [00051] 90 ° - dδ. If this complementarity is not followed, then the first opening for fluid channel 112 of the heat exchanger hull 104 formed by the heat exchanger plates that are located 106, will obtain a non-quadrilateral shape, for example, an undesirable hexagon. Preferably the dδ deviation is equal to 0 °.
    [0052] [00052] In the embodiment shown in figure 2B, the first corner edge portion 226 is inclined at a first angle 0 ° <α <90 ° in relation to the first middle edge portion 221. The value of this angle α depends on the dimensions and orientations selected from the various surface regions. To have the second corner edge portion 228 substantially perpendicular to the plane S the first angle α is greater than 0 °. The finite dimensions of the first and second surface portions 210, 212 require that the first angle be less than 90 °. Preferably the first angle α is in the range of 5 ° <α ≤ 30 ° to achieve a smooth flow distribution at the entrance to, and at the exit of, the respective first channels for fluid 108.
    [0053] [00053] Furthermore, in this embodiment the first and second folded surface portions 210, 212 are created by folding along the corresponding first and second fold lines 229, 231 in the plane of the rectangular plate 204. This first fold line 229 is located between the first surface portion 210 and the main surface portion 218, while the second fold line 231 is located between the second surface portion 212 and the main surface portion 218.
    [0054] [00054] The geometry of the resulting folded heat exchanger plate shown in figure 2B further infers that an additional fold line 233 is required by connecting a point on the second plate edge 222 with an intersection of the first fold line 229 and the second line folding surface 231. In this configuration the corner surface portions 224 of the heat exchanger plate 106 are also folded along a diagonal folding line 234, which connects an intersection of additional folding line 233 and second plate edge 222 with an intersection of the second fold line 231 and the first plate edge 220.
    [0055] [00055] According to alternative modalities, the first surface portions 210 may be folded flat surface flaps perpendicular to the S plane or they may be curved folded regions. In the latter case the additional fold line 233 and the diagonal fold line 234 are not required.
    [0056] [00056] The heat exchanger plate 106 can have a second partial channel for fluid 232 which is substantially perpendicular to the first partial channel for fluid 230. This perpendicular property can be present regardless of the geometry, which can be folded and polygonal as in the figure 2B or can be bent at an angle.
    [0057] [00057] As already mentioned, heat exchanger plates 106 can also be constructed from plates that have a non-rectangular quadrilateral shape. The first and second partial channels for fluid 230, 232 are not required to be perpendicular in this case. The symmetrical quadrilateral plate configuration is only subject to the restriction that the first contact regions 214 still cover the S plane.
    [0058] [00058] Figure 3A shows schematically a perspective view of a rectangular plate 204 used to form a flanged heat exchanger plate 302 according to figure 3B. Again, the second surface portion 212 and the second plate edge 222 located on the rear side of the plate are not shown. At least one of the first surface portions 210 of the flanged heat exchanger plate 302 may comprise a first flange 304 next to the corresponding first plate edge 220.
    [0059] [00059] The first flange 304 can be present along the entire first plate edge 220, which means along both of them, the first middle edge portion 221 and the first corner edge portions 226, as shown in the figure 3B. Alternatively, at least a first surface portion 210 may comprise a first flange 304 which is located primarily along the first middle edge portion 221, while gradually receding into the corner surface portion 224. In this case, the first flange 304 merges with a first corner edge portion without flange 226. Such transitions in forged heat exchanger plates 302 can be manufactured from plate molds that have deformable plastic properties as described above.
    [0060] [00060] Alternatively or in addition to the first flange 304, at least one of the second surface portions 212 of the flanged heat exchanger plate 302 may have only a second flange 306 next to the second corresponding middle edge portion 223. Figure 3B shows an embodiment of a flanged heat exchanger plate 302 that includes first and second flanges 304, 306. The formation of the first and second partial channels for fluid 230, 232 is similar to the embodiment shown previously in figure 2B. The first flange 304 includes the first contact region 214 which, together with the first remaining contact region of the flanged heat exchanger plate 302, defines the S plane. In Figure 3B, the entire first flange 304 is located on the S plane and coincides entirely with the first contact region 214. Alternatively, the first flange 304 may have a first flange portion 310 which is bent in such a way that it is inclined with respect to the S plane, which is further explained with reference to figures 5.
    [0061] [00061] Figure 4 shows a perspective cross-sectional view of a stacked pair of heat exchanger hulls 104 according to an embodiment. A single heat exchanger hull 104 comprises heat exchanger plates 166 "which are joined along their respective first contact regions 214, 214". In general, these first contact regions 214, 214 "can comprise one or more of the following elements selected from the first middle edge portions 221, the first corner edge portions 226 and / or the first flanges 304, possibly excluding the first portions inclined flange 310. These elements have been illustrated in the preceding figures.To reduce or eliminate fluid leakage into the environment, it is preferred that the first contact regions 214, 214 "of the heat exchanger plates 166" are sealed. contact 214, 214 "can be partially or entirely sealed by first sealing joints 402 between the heat exchanger plates 166". Similarly, the second contact regions 216, 216 "can be connected by second sealing joints 404. This sealing joints 402, 404 can, for example, be achieved by welding, brazing or fixing the heat exchanger plates along their respective first a and second contact regions. Methods of joining the plates are further explained with reference to figure 5.
    [0062] [00062] According to one embodiment, the heat exchanger plate 106 may have a first portion of essentially flat surface 210 that is inclined at a second angle β with respect to the S plane. This second angle β may be in the range of 0 ° <β ≤ 135 °. The case β = 90 ° represents a first portion of surface 210 that is perpendicular to the plane S. The unrealistic value with β = 0 represents the asymptotic limit that results in a first channel for fluid 108 with evanescent height and lack of spacing between the main surface portions 218, 218 'of adjacent heat exchanger plates 106, 106'. For cases β <90 ° shown in figure 4, the first surface portions 210, 210 "are inclined in relation to the S plane, resulting in a first channel for fluid 108 with a regular hexagonal shape. The range 90 ° <β ≤ 135 ° similarly produces a hexagonal shape with first surface portions that are folded inwardly relative to the first fluid channel 108. In both configurations the corner surface portions 224 of the heat exchanger plate can be folded over along the additional fold lines 233. This second angle β may preferably be in the range of 30 ° ≤ β ≤ 135 ° to maintain a heat exchanger hull 104 with first surface portions 210 that are not excessively protruding or sharp along the edges .
    [0063] [00063] Alternatively, a heat exchanger plate 106 may have first and / or second surface portions 210, 212 which are bent at an angle, as explained with reference to figures 5A-5E. In such cases the first surface portion 210 is not a folded flat region making the concept of the second angle β less useful. Here the relationship between the height H of the first partial channel for fluid and the projected width W of the first surface portion on the plane S is more appropriate. For the same reason given above, the H / W ratio for projecting out first surface portions 210 is preferably greater than 1 / √3. The upper limit for H / W cannot be provided, however it corresponds to a curved configuration of the first surface portion 210 which converges to the perpendicular configuration shown in figure 5A.
    [0064] [00064] Figures and 5A-5J show partial cross-sections of the first channel for fluid 108 for various types of heat exchanger hull. Figures 5A-5E focus on the shape of the first surface portions 210, 210 'of two heat exchanger plates that are 106', 106 ". According to the meaning adopted of the terms folding or turning previously explained, the first portions of surface 210, 210 "can be folded in several ways, resulting in several shapes. Shapes shown for the first surface portions 210, 210 "are flat and perpendicular (figure 5A), flat and inclined (figure 5B), concave (figure 5C), convex (figure 5D) and sinusoidal (figure 5E). figures 5A-5J illustrate various shapes for the contact regions 214, 214 "of adjacent heat exchanger plates 166", 302, 302 ", as well as methods of securing adjacent plates. These first contact regions 214, 214 "can be formed by the first plate edges 220, 220" (figures 5A -5E), all over the first flanges 304, 304 "(figure 5F) or by regions of the first flanges 304, 304 "which exclude the first flange portions 310, 310" (figures 5G-5E).
    [0065] [00065] As shown in figures 5G-5E, the first flange 304 may have a first flange portion 310 which is bent in such a way that it is inclined with respect to the S plane. The first inclined flange portion 310 will not lie on the plane S and, therefore, does not coincide with the first contact region 214. An inclination between the S plane and the first flange portion 310 can be described by a third angle γ. The third angle γ is restricted to the range 0 ° <γ <180 °. The upper limit of this band can be further limited by the possibility of physical contact between the first flange portion 310 and the first surface portion 210.
    [0066] [00066] The selected shape of a first surface portion 210 dictates the geometric transition from this first surface portion 210 to the folded corner surface portion 224 of a heat exchanger plate 106, 302. The transition can be gradually curved or it can be more like the configuration of the polygonal heat exchanger plate as shown in figures 2B and 3B.
    [0067] [00067] In addition, it is possible that two heat exchanger plates that are found have different shapes.
    [0068] [00068] Connection and sealing of the first and second contact regions 214, 216 can be achieved by conventional methods such as welding and brazing. Known welding methods, which are shown here, produce a fillet weld 502, a plasma or electrical resistance weld 504 (figure 5A), a groove weld 506 (figures 5B and 5C) and an edge weld 508 (figures 5D and 5E) or a butt weld (not shown).
    [0069] [00069] Furthermore, it is known that the welding quality can be improved by removing some plate material from the contact regions 214, 216 in order to form a welding groove along these contact regions. As illustrated in figures 5F-5H, the provision of flanges 304 increases the area of the contact regions 214 presenting an accessible shoulder to apply the edge weld 508. Several more well-known edge sealing techniques can be employed, as will be obvious to a specialist in welding.
    [0070] [00070] A pair of adjacent heat exchanger plates 106, 302 can be provided with an edge clamp 512 or a flow guide element 514, as shown in figure 5I and figure 5J, respectively. The edge clamp 512 or flow guide element 514 can be located on an adjacent pair of first surface portions 210, 210 'of the two adjacent heat exchanger plates 106, 106', 302, 302 ".
    [0071] [00071] For heat exchanger plates 106, 302 that are welded together, a flow guide element 514 is not required to have a high mechanical stiffness, since the main purpose of the flow guide element 514 will be to guide the flow inwards fluid channels 108, 110.
    [0072] [00072] For non-welded heat exchanger plates 106, 302, it may be desired to apply edge clamps 512 or more rigid flow guide elements 514. In the latter case, an additional function of the flow guide element 514 is to hold the plates together and prevent leakage to and from the fluid channels 108, 110. This is shown in figure 5E. The edge clamp 512 which also serves as a flow guide element 514 is connected along the first surface portions 210, 210 "and can be made of an elastic material such as spring steel. An attached edge clamp 512 compresses the heat exchanger plates heat along the first contact regions 214, 214. A gasket 516 can be applied along and between the first contact regions to improve the seal of the first channel for fluid 108. In addition, sealing material 518 can be applied along and next to the first contact regions, preferably being surrounded by edge clamp 512. Since the geometry of the heat exchanger hull changes next to the corner surface portions 224, a permanent connection, for example, welding or brazing of the first contact regions 214 can be preferred here over edge clamps 512 or flow guide elements 514.
    [0073] [00073] Although not illustrated in the figures, the second surface portions 212 can also be curved in a manner similar to the illustrations in figures 5. In addition, the measures described above for joining the heat exchanger plates along their respective first and second contact regions 214 can also be applied to the second contact regions 216 of two heat exchanger plates or hulls. The joining method can be applied across any of the contact regions 214, 216 in any desired combination.
    [0074] [00074] Figure 6 shows a perspective view of a stacked pair of flanged heat exchanger hulls 602. One of the flanged heat exchanger hulls 602 shown is provided with a flow guide element 514 which is located in an adjacent pair of first surface portions 210, 210 'of two forged heat exchanger plates meeting 302, 302'.
    [0075] [00075] Several flow guide elements 514 can be installed on the first available surface portions 210 in this way. Alternatively or in addition, one or more flow guide elements 514 may be provided in an adjacent pair of second surface portions 212 ', 212' 'of two adjacent forged heat exchanger plates 302', 302 ''.
    [0076] [00076] Flow guide element 514 may be an ordinary flow guide that guides fluid flow into or out of fluid channels 108, 110 while reducing flow separation.
    [0077] [00077] Alternatively, the flow guide element 514 can be a ferrule 606, which is a thin curved plate that surrounds a pair of adjacent surface portions 210, 210 'or 212', 212 '', preferably provided at the first entrance or second channel openings for fluid 112, 114. This ferrule 606 next to the inlet of fluid channel openings 112, 114 extends a certain distance into the inlet of the channel openings for fluid inlet 112, 114. One thermally insulating space filled with stagnant fluid found within the respective fluid channel can be provided between the ferrule 606 and the main surface portions 218 of the forged heat exchanger plates 302, to protect the main surface portions and channel openings for fluid, direct contact with fluid that penetrates the fluid channels. In addition, this thermally insulating space can be filled with insulating material 610, such as ceramic, fiber paper, to increase insulation performance. This prevents edge surfaces from being overcooled or overheated due to the flow of incoming fluid.
    [0078] [00078] Also the flow guide element 514 can be a converging nozzle (not shown) that can also be connected close to the fluid channel inlet openings and which extends a certain distance into the fluid channels. In addition, the nozzle wall that converges into the fluid channel is capable of generating a jet from the incoming fluid stream.
    [0079] [00079] In summary, any of these flow guide elements 514 can be provided in at least one of an adjacent pair of first surface portions 210, 210 'and an adjacent pair of second surface portions 212', 212 '' of two adjacent heat exchanger plates.
    [0080] [00080] Figure 7B shows an embodiment of a heat exchanger hull 104 composed of asymmetric heat exchanger plates 702, each having a portion of the inclined main surface 704. As a consequence, the heat exchanger hull 104 has a first channel for irregular fluid 710 with a hexagonal cross section and a variable height along the width of this channel. The inclination of the inclined main surface portion 704 can be achieved by providing a large first surface portion 706 and a small first surface portion 707 that differ in their respective widths, as can be seen in figures 7A and 7B. The embodiment shown has a second portion of quadrilateral surface 708, which varies in size over the width of the non-rectangular quadrilateral plate 202, which is used to form the asymmetric heat exchanger plate 702. Again, the second portion of quadrilateral surface 708 on the back of the card is not shown. Consequently, the reduction in height of the first channel for irregular fluid 710 is compensated for by the variable size of the second portions of quadrilateral surface 708, such that a first opening for the resulting rectangular fluid channel 712 is moreover rectangular.
    [0081] [00081] In figure 7B the quality of substantially perpendicular to the respective second corner edge portions 228 is again indicated by the corner edge angle δ of 90 ° with respect to the S plane.
    [0082] [00082] A plane defined by the first channel opening for rectangular fluid 712 is inclined in relation to the first channel for irregular fluid 710 instead of being perpendicular, as shown in figure 1.
    [0083] [00083] Alternatively or in addition, the first channel for irregular fluid 710 can receive a variable cross section along its length in an analogous manner. Furthermore, the dimensions of the cross section of a second channel for irregular fluid 714 may vary along its length. Such variation of dimensions along the irregular fluid channels 710, 714 can be used to correct unfavorable temperature distributions within the heat exchange fluids.
    [0084] [00084] In addition to varying the dimensions of the surface portions 704, 708 along the corresponding partial passages for fluid, the variation of dimensions of the channel cross sections can also be achieved by varying the curvature of the first and second surface portions 706, 708 along the same channels for fluid. In general, fluid channels can be created with converging, diverging, or otherwise non-uniform cross sections along their lengths.
    [0085] [00085] According to one aspect, a method for making the 106i heat exchanger plate is provided. In general, the heat exchanger plate is manufactured from a quadrilateral plate 202 that has a pair of first opposite plate edges 220 and a pair of second opposite plate edges 222. The method comprises folding the first surface portions 210, each one of which is located along a first middle edge portion 221 of a first plate edge 220, to a first side of the quadrilateral plate 202. This produces a first groove or first partial channel for fluid 230. Consequently, each first portion surface 210 will have a first contact region 214. The method further comprises folding second surface portions 212, each of which is located along a second middle edge portion 223 of a second plate edge 222 to a second side quadrilateral plate 202. This will result in a second groove or second partial channel for fluid 232 and on each second portion of surface 212 obtaining a second region of contact 216. After these folding operations, the first contact regions are coplanar and together define a plane S. The heat exchanger plate 104 has four corner surface portions 224, each comprising a first corner edge portion 226 and a second corner edge portion 228. The method is characterized by the fact that at least two corner surface portions 224 are folded inwardly with respect to the first partial channel for fluid 230, such that the respective first edge portion corner 226 will end in the S plane, while the respective second corner edge portions 228 will end up being substantially perpendicular to the S plane.
    [0086] [00086] According to one embodiment, the folding of at least one of the first surface portions 210 still results in this first surface portion being tilted at an angle β with respect to the S plane. This angle can be in the range 0 ° <β ≤ 135 °. In addition, at least one of the at least two corner surface portions 224 can be folded along an additional fold line 234 that connects the respective first corner edge portion 226 and the second corner edge portion 228.
    [0087] [00087] According to one embodiment, at least a first middle edge portion 221 of the quadrilateral plate 202 is folded to the first side 206 of the heat exchanger plate 106, resulting in at least one first contact region 214 that matches the respective first middle edge portion 221.
    [0088] [00088] According to another embodiment, at least a first surface portion 210 of the quadrilateral plate 202 comprises a first flange 304 next to the first corresponding middle edge portion 221. After folding the first surface portion 210 to the first side 206 of the heat exchanger plate 106, the first flange 304 is also folded. At least a portion of the first flange 304 will lie on the S plane and will include the first contact region 214.
    [0089] [00089] According to another embodiment, at least a second portion of surface 212 of quadrilateral plate 202 comprises a second flange 306 next to the second portion of corresponding middle edge 223. After folding the second portion of surface 212 to the second side 208 of the heat exchanger plate 106, the second flange 306 is also folded. At least a portion of the second flange 306 will include the second contact region 216.
    [0090] [00090] The above descriptions are intended to be illustrative and not limiting. It will be apparent to someone skilled in the art that alternative and equivalent modalities of the invention can be designed and made practical without departing from the scope of the claims described below. List of figure elements 102 heat exchanger set 104 heat exchanger hull 106 plate heat exchanger 108 first channel for fluid 110 second channel for fluid 112 first channel opening for fluid 114 second channel opening for fluid o 202 quadrilateral plate 204 rectangular plate 206 first side 208 second side 210 first surface portion 212 second portion of surface 214 first contact region 216 second contact region 218 main surface portion 220 plate edge 221 first portion of middle edge 222 second plate edge 223 second portion of middle edge 224 corner surface portion 226 first corner edge portion 228 second corner edge portion 229 first folding line 230 first partial channel for fluid 231 second folding line 232 second partial channel for fluid 233 additional folding line 234 diagonal folding line S flat δ corner edge angle α first angle 302 flanged heat exchanger plate 304 first flange 306 second flange 308 flange corner portion 310 first flange portion 312 second flange portion 402 first gasket 404 second gasket β second angle 502 fillet weld 504 plasma solder 506 groove weld 508 edge weld 510 butt weld 512 edge clamp 504 flow guide element 516 gasket 518 sealing material H. height W projected width γ third angle 602 flanged heat exchanger hull 606 ferrule 608 converging nozzle 610 insulating material 702 asymmetric heat exchanger plate 704 portion of inclined main surface 708 first portion of wide surface 707 first small surface portion 708 second portion of quadrilateral surface 710 irregular first channel for fluid 712 first opening rectangular channel for fluid 714 irregular second channel for fluid
    权利要求:
    Claims (14)
    [0001]
    Heat exchanger plate (106) formed of a quadrilateral plate (202) having a pair of opposite opposite plate edges (220) and a pair of second opposite plate edges (222) to a heat exchanger plate having first portions of surface (210), each along a first middle edge portion (221) of a first plate edge (220), each first surface portion (210) comprising a first contact region (214), the heat exchanger having second surface portions (212), each along a second middle edge portion (223) of a second plate edge (222), each second surface portion (212) comprising a second contact region (216), whereby the first surface portions (210) are folded to a first side (206) of the quadrilateral plate (202), resulting in a first partial fluid channel (230) and the second surface portions (212) are folded to a second side (208) of the quadrilateral plate (20 2) resulting in a second partial channel for fluid (232), so that the first contact regions (214) are coplanar defining a plane (S) and so that the heat exchanger plate (106) comprises portions of surface of corner (224) comprising a first corner edge portion (226) and a second corner edge portion (228), characterized by the fact that at least two corner surface portions (224) are folded inwardly relative to the first partial fluid channel (230), such that the respective first corner edge portions (226) are in the S plane, while the respective second corner edge portions (228) are perpendicular (δ) to the plane (S).
    [0002]
    Heat exchanger plate according to claim 1, characterized in that at least one of the first surface portions (210) is inclined at an angle (β) in relation to the plane (S), the angle (β) being in the range of 0 ° <β ≤ 135 °.
    [0003]
    Heat exchanger plate (106) according to any one of claims 1 to 2, characterized in that the quadrilateral plate (202) is a rectangular plate (204) and in which the second partial channel for fluid (232) is perpendicular to the first partial fluid channel (230).
    [0004]
    Heat exchanger plate (106) according to any one of claims 1 to 3, characterized in that at least one first contact region (214) comprises the respective first middle edge portion (221).
    [0005]
    Heat exchanger plate (106) according to any one of claims 1 to 3, characterized in that at least a first surface portion (210) comprises a first flange (304) next to the first corresponding middle edge portion (221 ) of the first flange (304) including the first contact region (214).
    [0006]
    Heat exchanger plate (106) according to any one of claims 1 to 5, characterized in that at least a second surface portion (212) comprises a second flange (306) next to the corresponding second middle edge portion (223 ) the second flange (306) including the second contact region (216)
    [0007]
    Heat exchanger plate (106) according to any one of claims 5 to 6, characterized in that a first flange portion (310) of the first flange (304) is folded in relation to the plane (S), the first flange portion (310) excluding the first contact region (214).
    [0008]
    Heat exchanger plate (106) according to any one of claims 1 to 7, characterized in that the cross-section of at least one of the first and second partial channels for fluid (230, 232) varies over at least one of the first and second partial channels for fluid (230, 232).
    [0009]
    Heat exchanger plate (106) according to any one of claims 1 to 8, characterized in that a main surface portion (218) of the heat exchanger plate (106) is inclined with respect to the S plane.
    [0010]
    Heat exchanger hull (104), characterized in that it comprises a pair of heat exchanger plates (106, 106 ') as defined by any one of claims 1 to 9, wherein the heat exchanger plates (106, 106 ') be connected along their first contact regions (214, 214 "), the first partial channels for fluid (230, 230") of the respective heat exchanger plates forming a first channel for fluid (108).
    [0011]
    Heat exchanger assembly (102), characterized in that it comprises a plurality of heat exchanger hulls (104) as defined by claim 10, in which at least two heat exchanger hulls (104, 104 ') are connected along their second contact regions (216, 216 ') such that one of the second partial fluid channels (232) of a first heat exchanger hull (104) combines with one of the second partial fluid channels (232') of a second heat exchanger hull (104 ') forming a second fluid channel (110).
    [0012]
    Heat exchanger assembly (102) according to claim 11, characterized in that at least one flow guide element (514) is provided in at least one of an adjacent pair of first surface portions (210, 210 ") and an adjacent pair of second surface portions (212 ", 212") of two adjacent heat exchanger plates (106, 106 ", 106").
    [0013]
    Heat exchanger assembly according to claim 12, characterized in that the flow guide element (514) is a ferrule (606).
    [0014]
    Method for making a heat exchanger plate (106) from a quadrilateral plate (202) that has a pair of first opposite plate edges (220) and a pair of second opposite plate edges (222), the method comprising : fold first surface portions (220), each located along a first middle edge portion (221) from a first plate edge (220) to a first side of the quadrilateral plate (202) resulting in a first partial channel for fluid (230) and on each first surface portion (210) comprising a first contact region (214), bend second surface portions (212), each located along a second middle edge portion (223) of a second plate edge (222) to a second side of the quadrilateral plate (202) resulting in a second partial channel for fluid (232) and on each second surface portion (212) comprising a second contact region (216), whereby after folding, the first contact regions (214) are coplanar defining a plane S, and therefore, the heat exchanger plate (106) comprises corner surface portions (224) comprising a first edge portion corner (226) and a second corner edge portion (228), characterized by the fact that bend at least two corner surface portions (224) inwardly relative to the first partial fluid channel (230) such that the respective first corner edge portions (226) are in the S plane, while the respective second portions corner edges (228) are perpendicular to the S plane.
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    同族专利:
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    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-07-16| B06T| Formal requirements before examination|
    2020-08-04| B09A| Decision: intention to grant|
    2020-12-01| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 17/12/2010, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    NL2003983|2009-12-18|
    NL2003983A|NL2003983C2|2009-12-18|2009-12-18|Plate type heat exchanger and method of manufacturing heat exchanger plate.|
    PCT/NL2010/050858|WO2011074963A2|2009-12-18|2010-12-17|Plate type heat exchanger and method of manufacturing heat exchanger plate|
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