• 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:
    Circulation channel for the conduction of a fluid of a heat exchanger, and heat exchanger. The channel (1) comprises two surfaces (s1, s2), each one with a plurality of protruding elements (p), which project into the interior of the channel (1), arranged side by side forming a row that includes protruding elements (p ) different in their shape, and extending according to a longitudinal direction according to the main direction of circulation y of the circulating fluid, so that the fluid flow encounters different protruding elements (p) in a sequential manner both in space, according to said longitudinal direction, as in time, generating a plurality of disordered streamlines (l). The heat exchanger comprises circulation channels for a fluid, at least one of which is formed according to the circulation channel of the present invention. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2630754A1
    申请号:ES201630189
    申请日:2016-02-19
    公开日:2017-08-23
    发明作者:Yolanda BRAVO RODRÍGUEZ；Juan Carlos DE FRANCISCO MORENO；María Luisa MIEDES ARNAL；Fernando PUÉRTOLAS SÁNCHEZ
    申请人:Valeo Termico SA；
    IPC主号:
    专利说明:

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    DESCRIPTION
    CIRCULATION CHANNEL FOR THE DRIVING OF A HEAT EXCHANGER FLUID, AND HEAT EXCHANGER
    Technology Sector
    The present invention relates in general, in a first aspect, to a circulation channel for the conduction of a fluid from a heat exchanger, provided with a plurality of protuberant elements generating turbulence, and more particularly to a circulation channel with an improved disposition of protruding elements.
    A second aspect of the present invention concerns a heat exchanger comprising one or more circulation channels formed according to the channel of the first aspect of the invention.
    The invention is especially applied in exhaust recirculation exchangers of an engine ("Exhaust Gas Recirculation Coolers" or EGRC).
    State of the prior art
    The main function of the EGR exchangers is the exchange of heat between the exhaust gases and the cooling fluid, in order to cool the gases.
    Currently, EGR heat exchangers are widely used for diesel applications to reduce emissions, and are also used in gasoline applications to reduce fuel consumption.
    Basically, there are two types of EGR heat exchangers: a first type consists of a housing in whose interior there is a parallel tube bundle that constitutes circulation channels for the passage of gases, the refrigerant circulating through the housing, externally to the tubes, and the second type consists of a series of parallel plates that constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate through defined circulation channels between two respective plates, in alternating layers, and may include fins for the better heat exchange.
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    The market tends to reduce the size of the engines, and to the application of EGR heat exchangers not only in high pressure (HP) applications but also in low pressure (LP) applications; both have an impact on the design of EGR heat exchangers. Vehicle manufacturers demand EGR heat exchangers with higher yields and, at the same time, the space available to place the exchanger and its components is becoming smaller and more difficult to integrate.
    In other words, the requirements for the design and fabrication of EGR exchangers have evolved, so that increasingly compact heat exchangers are required. There are two ways to increase this compactness: the one based on providing the heat exchange surface with secondary surfaces (fins) and the one based on including specific protrusions (or undulations) on these surfaces to promote the turbulence of the circulating gas and, therefore increase the value of the heat transfer coefficient.
    The proposals based on defining protuberances have a great potential when it comes to increasing the compactness of the final product in comparison with the rest of existing technologies, despite the fact that the inclusion of such protuberances also increases the pressure loss of the circulating gas . On the other hand, in comparison with the proposals based on the inclusion of secondary surfaces (fins), the impact on this parameter (loss of pressure) would be less if the influence of the phenomenon known as "fouling" is taken into account, that is to say accumulation of dirt, in general hollln.This is because the hydraulic diameter associated with the proposals based on promoting turbulence, that is, those based on protuberances, is greater than that associated with fin-based ones, so that the former avoid a severe accumulation of hollln inside the exchanger block.
    There are patent documents that describe some proposals based on protuberances, differing mainly in the type and manner of arranging the protuberances inside the circulation channels of the heat exchangers.
    One such proposal is described in the patent ES2259265B1, of the same holder as the present application, in which a tube for the conduction of a fluid of a heat exchanger is described, which comprises two opposite walls according to a Z direction, each of which provided with at least one discontinuous corrugation located in front of a corresponding discontinuous corrugation arranged on the opposite wall, arranged in
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    so that a projection in the Z direction thereof on an XY plane defines a silhouette substantially in the form of "X".
    Another such proposal based on the inclusion of bumps inside the circulation channel is described in patent ES2496943T3, which corresponds to the validation of European patent EP1682842B1, which meets the characteristics defined in the preamble of revindication 1 of The present invention.
    In the circulation channel proposed in ES2496943T3 the protruding elements of the row, in general, are equal to each other. However, in its description it is commented very generically that “it would be possible to use different structural elements in a row, p. ex. 13 and 14 ”, although protruding elements very different from each other are not described in ES2496943T3, since all those described are based on one or more segments of elongated and / or curved elongated elements.
    But the most important thing is that the row of protuberant elements different from each other than those referred to in ES2496943T3 runs according to a direction transverse to the main direction of circulation of the circulating fluid through the channel, so that each of the different protuberant elements affects a different transverse portion of the wavefront of the fluid, and only once during its circulation through the circulation channel.
    Thus, the results obtained, in terms of thermal efficiency, through the proposal made in ES2496943T3 are clearly improvable.
    Therefore, it is necessary to offer an alternative to the state of the art that covers the gaps found therein, providing a solution that substantially improves the performance offered by the circulation channels with protruding elements of the state of the art.
    Explanation of the invention
    To this end, the present invention concerns, in a first aspect, a circulation channel for the conduction of a fluid from a heat exchanger in a main direction of circulation Y, which comprises, in a known manner, two surfaces of heat exchanger substantially opposite each other, where each surface comprises a plurality of protruding elements, which protrude inside the circulation channel, arranged
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    next to each other forming at least one row that includes protruding elements that are different.
    Unlike known circulation channels, in particular unlike that described in patent ES2496943T3, where the row of protruding elements that are different runs according to a direction transverse to the main direction of circulation Y, in the circulation channel of the first aspect of the present invention said row extends at least according to a longitudinal direction according to the main direction of circulation Y, so that the fluid flow encounters different protuberant elements sequentially both in space, according to said longitudinal direction, and in the time, generating a plurality of disordered streamlines.
    This results in a much higher performance in terms of thermal efficiency, since each portion of the wavefront of the circulating fluid is affected by different protruding elements, at different times and locations along the channel.
    According to an example of realization, the aforementioned protruding elements are different from each other in terms of their shape.
    For another embodiment, alternative or complementary to the previous one, the protruding elements are different from each other in terms of their orientation.
    According to another embodiment, alternative or complementary to the previous ones, the protuberant elements are different from each other in terms of their dimensions.
    For an exemplary embodiment, said row also includes protruding elements of the same shape and dimensions.
    For another embodiment, alternative or complementary to the previous one, the row also includes protuberant elements of the same shape but different dimensions and / or different orientations.
    According to another embodiment, the row comprises a series of protruding elements that follow a pattern of repetition or sequence of two or more different protruding elements (in terms of shape and / or dimensions and / or orientation) that are repeated two or more times along the line.
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    The row extends, according to an example of realization, along at least 70% of the length of the channel, so that the fluid circulating through the channel interacts with the protruding elements along most of the channel.
    According to an example of realization, the row includes two or more sub-rows of protruding elements that extend longitudinally according to the main direction of circulation Y, including at least one of said sub-rows, for a variant of said realization example, elements protuberants of different shapes, different dimensions and / or different orientation.
    At least one of the sub-rows includes, for a variant of said realization example, protruding elements that spatially invade another of the sub-rows, so that a portion thereof is interspersed between the protruding elements of said other sub -row.
    For another example of realization, the row includes protruding elements arranged transversely displaced therein, or one of said sub-rows, being staggered in a direction transverse to the main direction of circulation Y.
    Specifically, for various realization examples, the row includes protruding elements with two or more of the following forms, according to a plan view, or a combination thereof: calculation, oval, rhombus, triangle, rectangle, elongated elements that follow a or more straight and / or curved paths.
    The aforementioned elongated protruding elements that follow more than one trajectory are formed, for an example of realization, by segments with different orientation angles.
    The row includes protruding elements whose shape is a combination of two or more of the aforementioned shapes, according to an example of realization, such as an elongated shape with a central area shaped like a circle.
    Preferably, the ends and / or vertices of the shapes of the protuberant elements are rounded.
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    For another example of realization, the row includes protruding elements whose shape is a variation of one of the forms listed above, including a triangle-like, rhombus or rectangle shape, but with one of its curved sides.
    According to an example of realization, at least one of the protruding elements of one of the two opposite surfaces of the channel is superimposed with at least one protruding element of the other surface.
    For a variant of said realization example, said superposed protruding elements are at least different in terms of dimensions.
    For another variant of said realization example, said superposed protruding elements are at least different in orientation.
    For another variant of said realization example, said superposed protruding elements are at least different in shape.
    According to another variant of said exemplary embodiment, said superimposed protruding elements have an elongated shape and are superimposed so that a projection of one over the other defines a substantially X-shaped shape.
    According to an implementation of said variant, the aforementioned form of X is not symmetric.
    According to one implementation, the smaller angle formed by the two segments of the X is between 26 ° and 40 °.
    According to another variant of said embodiment, at least two protruding elements of one of the two opposite surfaces of the channel are superimposed with a protruding element of the other surface, so that a projection of said two protruding elements on the another defines a form substantially in the form of double X.
    The previous variants of the example of realization relative to the at least two protruding elements superimposed on each other, are independent or combinable with each other, depending on the implementation of the circulation channel of the first aspect of the present invention.
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    All the variety of possible combinations of protruding elements covered by the realization examples described above, having in common all of them that include different protruding elements in the main direction of circulation Y, allows to design the circulation channel in a personalized manner for each application, with in order to obtain the required benefits and to adapt to the working conditions and the requirements of the application, for example in terms of compactness, optimizing the thermal exchange and minimizing the loss of pressure of the circulating fluid.
    The protruding elements have a maximum height of, in general, 1 to 2 mm, although other values are also possible
    Advantageously, the maximum height of each protruding element (ie the distance from the surface from which they protrude, in an orthogonal direction thereto) is less than two fifths the distance between the two heat exchanger surfaces opposite each other.
    A second aspect of the present invention concerns a heat exchanger, especially an engine's exhaust cooler, which comprises circulation channels for a fluid, where at least one of said circulation channels is formed according to the channel of the first aspect of the invention.
    According to an example of embodiment of the heat exchanger of the second aspect of the present invention, the circulation channels are formed as tubes through which said exhaust gases circulate and around which a cooling fluid circulates for thermal exchange with the exhaust gases, and at least the heat exchanger surfaces comprising protruding elements are like tube walls
    For a variant of said embodiment, the tube walls are flat, the cross-sections of the tubes being generally rectangular in shape.
    Alternatively, for other variants of said embodiment, the cross sections of the tubes are circular or oval in shape.
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    According to an example of realization, the length of each tube is between 80 mm and 220 mm.
    For another example of realization, the circulation channels are formed by stacking plates or discs, where at least the heat exchanger surfaces comprising protruding elements are like opposite walls of at least two of said plates or discs.
    Brief description of the drawings
    The foregoing and other advantages and features will be more fully understood from the following detailed description of some examples of realization with reference to the attached drawings, which should be taken by way of illustration and not limitation, in which:
    Figures 1a, 1b, 1c and 1d illustrate an example of realization of the circulation channel proposed by the first aspect of the present invention, the perspective channel being shown in Fig. 1c, in Fig. 1a a plan view, from above, from one of the surfaces of the channel, in Fig. 1b a plan view, from above, of the opposite surface and in view 1d a projection on an XY plane showing the superposition of the protrusions of both surfaces;
    Figures 2a, 2b, 2c and 2d illustrate, analogously to Figure 1, another example of realization of the circulation channel proposed by the first aspect of the present invention;
    Figures 3a, 3b, 3c and 3d illustrate, analogously to Figures 1 and 2, another example of realization of the circulation channel proposed by the first aspect of the present invention;
    Figures 4a, 4b, 4c and 4d illustrate, analogously to Figures 1, 2 and 3, another embodiment of the circulation channel proposed by the first aspect of the present invention;
    Figures 5a, 5b and 5c are, respectively, plan views of the circulation channel surfaces proposed by the first aspect of the invention and a projection on an XY plane showing the superposition of the protrusions of both surfaces, for another example of realization more;
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    Figure 6 shows, in perspective, a part of the channel proposed by the first aspect of the present invention, for an example of realization, together with a schematic representation, obtained by mathematical simulation, of the disordered current lines generated by the flow of circulating fluid through the channel when bumping the protuberant elements along the channel;
    Figure 7 shows, in perspective, part of the channel proposed by the first aspect of the present invention, for the same exemplary embodiment as Figure 6, together with portions of vectors representative of the flow of circulating fluid through the channel, a from data obtained by mathematical simulation, where the portions of vectors have been illustrated for three transverse regions spaced along the channel and with different shades of gray corresponding to different values of magnitude of the fluid velocity, in m / s, according to the scale represented in the figure, also obtained by simulation;
    Figure 8 is a view analogous to that of Figure 7, for the same example of embodiment, which also illustrates the results of mathematical simulations, the portions of vectors not being illustrated in this case, and the different velocity values also represented by different shades of gray, but on three respective transverse planes spaced along the channel; Y
    Figure 9 is a view analogous to that of Figure 8, for the same example of embodiment, but in this case the values represented by grayscale in the three respective transverse planes spaced along the channel do not correspond to velocity values but at values of magnitude of vector vorticity, in / s, according to the scale represented in the figure.
    Detailed description of some examples of realization
    Different examples of embodiment of the circulation channel 1 proposed by the first aspect of the present invention are illustrated in Figures 1 to 5, all of them having in common that they refer to a circulation channel 1 for the conduction of a fluid from an exchanger of heat in a main direction of circulation Y, which comprises two heat exchanger surfaces s1, s2 substantially opposite each other, where each of the surfaces s1, s2 comprises a plurality of protruding elements p protruding into the interior of the circulation channel 1, arranged next to each other forming at least one row that
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    It includes protruding elements p different in terms of shape and / or dimensions and / or orientation, and which extends according to a longitudinal direction according to the main direction of circulation Y.
    In particular, in the exemplary embodiments illustrated by said Figures 1 to 5, the heat exchanger surfaces s1, s2 are the internal surfaces of a larger flat walls of a rectangular section tube forming the circulation channel, although the same (or similar) distributions of protruding elements p illustrated may be applied to surfaces, flat or not, of another class of circulation channels other than those illustrated.
    The examples of embodiment of Figures 1 to 5 differ from each other by the different types, in terms of shape and / or dimensions and / or orientation, of protruding elements p included therein, as well as by the number and distribution of the themselves along the row.
    In particular, in the exemplary embodiment illustrated by Figures 1a, 1b, 1c and 1d, protruding elements with shapes (in plan) of: rhombus, circle and elongated elements (similar to spikes) of different lengths and orientations that follow are included , each of them, a unique straight path. All illustrated shapes have rounded ends and / or vertices.
    It can be seen in Figures 1a, 1b and 1d, that the arrangement of protruding elements p not only follows a pattern according to a row in the Y direction, but that there are sub-patterns that group some of the protuberant elements according to different arrangements, in particular of inclined clusters of protruding elements p whose shapes correspond to those of two pairs of circles with a rhombus in half arranged alternately (according to the row in the Y direction) with inclined clusters of shapes of two pairs of short spikes with a rhombus in medium, separated by protruding elements p shaped like long inclined spikes.
    As can be seen in Figure 1d, when projecting the protruding elements p of the surface s1 over those of the surface s2, substantially X-shaped silhouettes are defined, both for each pair of elongated protruding elements (spikes) and for each grouping inclined protuberant elements.
    As can be seen in Figure 1c, the aforementioned protruding elements p are formed by respective prints made from the external faces of the
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    larger flat walls of the tubular channel 1, so it is actually shown in Figure 1a (and also in the 2nd, 3rd, 4th and 5th) and indicates how p are the depressions caused by such prints that form the bumps on the face internal to channel 1. Any other method of configuring and arranging such protruding elements on surfaces s1, s2 other than stamping is also possible and is covered by the present invention.
    In the exemplary embodiment of Figures 2a, 2b, 2c and 2d, protruding elements are included with rhombus-shaped (in plan) shapes and elongated (spike-like) elements of different lengths that each follow a unique rectilinear path. . All illustrated shapes have rounded ends and / or vertices.
    In this embodiment, the row of protuberant elements includes three sub-rows: a central formed by the diamond-shaped ones (where these, unlike the embodiment of Figure 1, are slightly spatially offset alternately), a superior formed by a sequence of pairs of spikes of different length and orientation, and a lower analogue to the upper one, where both respective end portions of the protruding elements p of the upper and lower sub-row invade the space between each two rhombuses of the central sub-row
    As shown in Figure 2d, when the protruding elements p of the surface s1 are projected on those of the surface s2, in this case, some X-shaped silhouettes are also defined for each pair of elongated protruding elements (spikes).
    In the exemplary embodiment of Figures 3a, 3b, 3c and 3d, protruding elements are included with oval shapes (in plan), elongated elements (similar to spikes) of different lengths formed, each of them, by rectilinear segments with different angles of orientation.
    For this exemplary embodiment, as shown in Figure 3d, it is also fulfilled that when projecting the protruding elements p of the surface s1 over those of the surface s2, substantially X-shaped silhouettes are defined for each pair of protruding elements elongated (spikes).
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    The example of realization of Figures 4a, 4b, 4c and 4d differs from that of Figures 3a, 3b, 3c and 3d only in that it does not include the protruding elements shaped (in plan) of oval.
    Figures 5a, 5b and 5c illustrate another example of realization of the circulation channel proposed by the first aspect of the invention, which includes protruding elements only with elongated shapes (similar to spikes), but of different dimensions and different orientations, grouped according to different sub-rows that include protruding elements p that spatially invade another of the sub-rows, in particular the upper ends of the protruding elements p of the upper sub-row (according to the position illustrated in Figure 5a) are interspersed between the ends lower of the protuberant elements p of the upper sub-row, and vice versa.
    In this case, as shown in Figure 5c, when projecting the protruding elements p of the surface if on those of the surface s2, there are also defined substantially X-shaped silhouettes, for each pair of elongated protruding elements of equal dimensions
    The present inventors have performed a series of numerical simulations for a circulation channel such as that illustrated in Figures 1a, 1b, 1c and id, and the results thereof are illustrated in Figures 6 to 9, graphically on a portion of the circulation channel 1 (although the simulations have been carried out for the complete channel).
    The simulations have been carried out for a tubular circulation channel with a rectangular section, with dimensions of substantially 100 mm long, 14.5 mm high and 4.35 mm wide, and a wall thickness of 0.4 mm, and for protruding elements with a maximum height of substantially 1.3 mm (measuring from the inside of the wall from which they extend).
    In particular, Figure 6 shows the disordered current lines generated by the flow of circulating fluid through the channel when bumping the protruding elements p along it. The illustrated power lines are more tortuous and are in a greater number than those generated in the circulation channels of the state of the art, which causes the fluid to exit the channel at a temperature lower than that achieved with the state channels of the technique (for a channel with the same dimensions).
    Figures 7 and 8 represent, in gray scale, the values of the speed (m / s), in magnitude (module), of the circulating fluid through the circulation channel, for three transverse regions spaced along the channel , and in Figure 9 the vector vorticity values (/ s) for the same three transverse regions.
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    The results obtained demonstrate the goodness of the arrangement along the channel of protruding elements of different shapes, which is not only valid for the example of realization for which the results of numerical simulations have been graphically represented (Figures 6 to 9) , but also for the other exemplary embodiments illustrated 10 (Figures 2 to 5), and in general for any exemplary embodiment that includes different protruding elements along the circulation channel.
    A person skilled in the art could make changes and modifications in the described embodiments described without departing from the scope of the invention as defined in the appended claims.
    权利要求:
    Claims (18)
    [1]
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    1. - Circulation channel (1) for the conduction of a fluid from a heat exchanger in a main direction of circulation Y, which comprises two surfaces (s1, s2) of heat exchanger substantially opposite each other, where each of said surfaces (s1, s2) comprise a plurality of protruding elements, which protrude inside the circulation channel (1), arranged next to each other forming at least one row that includes protruding elements (p) that are different, characterized in that said row extends at least according to a longitudinal direction according to the main direction of circulation Y, so that the fluid flow encounters protruding elements (p) sequentially both in space, according to said longitudinal direction, and in time, generating a plurality of disordered current lines (L).
    [2]
    2. - Circulation channel according to claim 1, wherein said protruding elements (p) are different from each other in terms of their shape.
    [3]
    3. - Circulation channel according to claim 1 or 2, wherein said protruding elements (p) are different from each other in terms of their orientation.
    [4]
    4. - Circulation channel according to any one of the preceding claims, wherein said protruding elements (p) are different from each other in terms of their dimensions.
    [5]
    5. - Circulation channel according to any one of the preceding claims, wherein said row also includes protruding elements (p) of the same shape and dimensions.
    [6]
    6. Circulation channel according to any one of the preceding claims, wherein said row also includes protruding elements (p) in the same way but different dimensions and / or different orientations.
    [7]
    7. - Circulation channel according to any one of the preceding claims, wherein the row comprises a series of protruding elements (p) that follows a pattern of repetition or sequence of two or more different protuberant elements (p) that are repeated two or more times along the row.
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    [8]
    8. - Circulation channel according to any one of the preceding claims, wherein the row includes at least two sub-rows of protruding elements (p) extending longitudinally according to the main direction of circulation Y.
    [9]
    9. - Circulation channel according to claim 6, wherein at least one of said two or more sub-rows includes protruding elements (p) of different shapes, different dimensions and / or different orientation.
    [10]
    10. - Circulation channel according to claim 8 or 9, wherein at least one of the sub-rows includes protruding elements (p) that spatially invade another of the sub-rows, so that a portion thereof remains sandwiched between the protuberant elements (p) of said other sub-row.
    [11]
    11. - Circulation channel according to any one of the preceding claims, wherein the row includes protruding elements (p) arranged transversely displaced therein, or one of said sub-rows, being staggered in a direction transverse to the direction main circulation Y.
    [12]
    12. - Circulation channel according to any one of the preceding claims, wherein the row includes protruding elements (p) with at least two of the following forms, according to a plan view, or a combination thereof: calculation, oval , rhombus, triangle, rectangle, elongated elements that follow one or more rectilinear and / or curved paths.
    [13]
    13. - Circulation channel according to any one of the preceding claims, wherein the row includes elongated protruding elements (p) that follow more than one path, straight and / or curved, and are formed by segments with different angles of orientation.
    [14]
    14. - Circulation channel according to claim 12 or 13, wherein the row includes protruding elements (p) whose shape is a combination of two or more of said shapes.
    [15]
    15. - Circulation channel according to any one of the preceding claims, wherein the ends and / or vertices of the shapes of the protuberant elements (p) are rounded.
    [16]
    16. - Circulation channel according to any one of the preceding claims, wherein at least one of the protruding elements (p) of one (s1) of said two surfaces (s1,
    s2) is superimposed with at least one protruding element (p) of the other surface (s2), said protruding elements being superimposed (p) at least different in terms of dimensions.
    5 17.- Heat exchanger, especially the exhaust cooler of an engine, which
    It comprises circulation channels for a fluid, characterized in that at least one circulation channel (1) is formed according to one of the preceding claims.
    [18]
    18. Heat exchanger according to claim 17, wherein the circulation channels 10 are formed as tubes through which said exhaust gases circulate and around which a cooling fluid circulates for thermal exchange with the gases of exhaust, and in which at least the surfaces (s1, s2) of heat exchanger comprising protruding elements (p) are like tube walls.
    15. 19. Heat exchanger according to claim 18, wherein said tube walls
    They are flat.
    [20]
    20. Heat exchanger according to claim 17, wherein the circulation channels are formed by stacking plates or discs, where at least surfaces 20 (s1, s2) of heat exchanger comprising protruding elements (p) They are
    as opposite walls of at least two of said plates or discs.
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    ES2630754B1|2018-03-07|
    KR20180113589A|2018-10-16|
    US20210207896A1|2021-07-08|
    CN109073330B|2021-08-17|
    WO2017140851A1|2017-08-24|
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    ES201630189A|ES2630754B1|2016-02-19|2016-02-19|CIRCULATION CHANNEL FOR DRIVING A FLUID OF A HEAT EXCHANGER, AND HEAT EXCHANGER|ES201630189A| ES2630754B1|2016-02-19|2016-02-19|CIRCULATION CHANNEL FOR DRIVING A FLUID OF A HEAT EXCHANGER, AND HEAT EXCHANGER|
    US15/999,642| US20210207896A1|2016-02-19|2017-02-17|Circulation duct for conveying a fluid of a heat exchanger, and heat exchanger|
    KR1020187026828A| KR20180113589A|2016-02-19|2017-02-17|A circulating duct for transferring the fluid of the heat exchanger, and a heat exchanger|
    CN201780012321.5A| CN109073330B|2016-02-19|2017-02-17|Flow-through conduit for conveying a fluid of a heat exchanger, and heat exchanger|
    EP17705635.5A| EP3417228A1|2016-02-19|2017-02-17|Circulation duct for conveying a fluid of a heat exchanger, and heat exchanger|
    PCT/EP2017/053628| WO2017140851A1|2016-02-19|2017-02-17|Circulation duct for conveying a fluid of a heat exchanger, and heat exchanger|
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