• 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 exchanger for gases, especially for exhaust gases of an engine, and method of manufacture thereof The exchanger comprises: - a heat exchanger block (B) with: - a first circuit for the circulation of gases and a second circuit for the circulation of a cooling fluid, arranged for an exchange of heat between the gases and the cooling fluid; - a piece (P) with a through hole (h) arranged so that the gases or the cooling fluid flow therethrough; and - a tubular conduit (T) with a projection (F) extending radially outwards from one end (Ta) thereof and which is connected to a region surrounding the through hole (h). The method comprises the manufacture of the heat exchanger of the present invention.
    公开号:ES2677366A1
    申请号:ES201730110
    申请日:2017-01-31
    公开日:2018-08-01
    发明作者:Jesús JIMÉNEZ PALACIOS；Raúl ROMERO PÉREZ；Serafín URZAY EJEA；Fernando PUÉRTOLAS SÁNCHEZ
    申请人:Valeo Termico SA；
    IPC主号:
    专利说明:

    HEAT EXCHANGER FOR GASES, ESPECIALLY FOR GASESEXHAUST OF A MOTOR, AND MANUFACTURING METHOD OF THE SAME
    Technical sector
    The present invention generally concerns, in a first aspect, a heat exchanger for gases, especially for exhaust gases of an engine, which includes a tubular conduit fixed to a part thereof, and more particularly a heat exchanger. heat where the tubular conduit is configured to be fixed to said part by means of a projection thereof.
    A second aspect of the invention concerns a method of manufacturing the heat exchanger of the first aspect.
    The invention is especially applied in exhaust recirculation exchangers of an engine ("Exhaust Gas Recirculation Coolers" or EGRC ».
    Prior art
    In the state of the art, heat exchangers for gases that meet the characteristics of the preamble of claim 1 of the present invention are known, that is, they comprise:
    - a heat exchanger block comprising:
    - a first fluid circuit for the circulation of gases and a second fluid circuit for the circulation of a refrigerant fluid, in which the first and second fluid circuits are fluidically isolated from each other and arranged for a heat exchange between said gases and said cooling fluid;
    - at least one piece having a through hole that passes through a wall of said at least one piece, in which said through hole is arranged such that said gases or said cooling fluid flow therethrough; Y
    - at least one tubular pipe connected to said at least one piece such that it is in fluidic communication with said through hole.
    In general, such tubular ducts, especially when these are coolant inlet or outlet ducts, are fixed to the housing of the heat exchanger block by CMT welding (acronym for the English terms "Cold Metal Transfer"). This welding technique requires approximately 20 seconds to weld each joint.
    In addition, in order to use the said CMT welding technique it is necessary that there is a space around the tubular conduits to be welded, in order to allow access to the welding torch or torch. In some specific designs of heat exchangers, it is very difficult to have the aforementioned space that allows access to the torch or torch to areas near the ends of the conduits to be welded, because there are other components arranged very close to the conduits.
    For such cases it would be desirable to use other fixing techniques for which there was no problem the non-existence of such access spaces, because they can act more or less remotely. Such is the case of the technique known as remote laser welding, which allows welding operations to be carried out remotely, so it is not necessary that the welding system is close to the components to be welded, since the only space The required access is the one that allows access to the laser beam, which is very small. For example, it is known that by such a remote welding technique the laser welding head can act within distances of between 420 and 470 mm with respect to the components to be welded.
    Most known designs of heat exchangers do not allow the use of such remote fixing techniques.
    On the other hand, there are some proposals that allow the use of laser welding to fix conduits to other parts of the heat exchange, such as those described in patent documents DE9319731U1, EP151804381, DE10255978A1 and DE1035991183.
    However, the proposals made in such patent documents suffer from various and different drawbacks, such as the need to introduce the conduit into the hole of the part (DE9319731U1) or into a specific connector inserted therein (DE10255978A1), or the piece inside the tubular duct (EP151804381, where the duct would be the housing of the heat exchanger block), of having to make substantial modifications to the piece that may affect its structural resistance (DE1 0255978A 1). Likewise, in most of these proposals welding is carried out under test, which causes the welding joint to not be as strong as it would be desirable.
    It therefore appears necessary to offer an alternative to the state of the art that provides a heat exchanger configured so as to allow the use of the aforementioned remote fixing techniques, and that does not suffer from the inconveniences of the exchangers known in the state of the technique.

    Explanation of the invention To this end, a first aspect of the present invention concerns a heat exchanger for gases, especially for exhaust gases of an engine, comprising, in a manner known per se:
    - a heat exchanger block comprising:
    - a first fluid circuit for the circulation of gases and a second fluid circuit for the circulation of a refrigerant fluid, in which the first and second fluid circuits are fluidically isolated from each other and arranged for a heat exchange between said gases and said cooling fluid;
    - at least one piece having a through hole that passes through a wall of said at least one piece, in which said through hole is arranged such that said gases or said cooling fluid flow therethrough; Y
    - at least one tubular conduit attached to said at least one part such that it is in fluid communication with said through hole.
    Unlike the heat exchangers known in the state of the art, in that proposed by the first aspect of the present invention, characteristically, said at least one tubular conduit comprises at least one projection extending radially outwardly from one end of the at least one tubular conduit, and said at least one projection is connected to a region of one of two opposite surfaces of said wall, where said region surrounds said through hole.
    Preferably, said union is not merely superficial but penetrates the piece without going through it completely.
    According to a preferred embodiment of the heat exchanger of the first aspect of the present invention, the projection is connected to said region of one of the two opposite surfaces by laser welding, preferably remotely.
    By arranging such a projection in the tubular duct, it is necessary to have a fixation of the same to the piece, thus increasing the contact area between the two, and therefore the area of connection, and being more easily accessible for a system of remote fixation, such as one that implements the aforementioned remote welding technique.
    Likewise, the projection acts, before joining the piece, as a support foot for the tubular conduit on the surface of the piece to which it will be attached.
    According to a preferred embodiment, said projection is a continuous perimeter flange.
    Alternatively, the exchanger of the first aspect of the present invention comprises a plurality of said projections arranged in the same plane and extending radially outward from different angular positions of said end of said tubular conduit.
    Preferably, at least one surface of the projection intended to come into contact with said region of one of the two opposite surfaces is substantially flat.
    As regards the said region of one of the two opposite surfaces, it is preferably substantially flat.
    According to an exemplary embodiment, the heat exchanger of the first aspect of the present invention comprises positioning means for positioning the tubular conduit with respect to said piece, so that the projection is in contact with the region of one of the two opposite surfaces and properly positioned to be fixed thereto, and the end of the tubular conduit from which the projection extends radially outward
    cover the through hole, that is, cover it.
    According to a variant of said exemplary embodiment, said positioning means comprise complementary configurations, arranged respectively in the projection and in an area of one of the two opposite surfaces that is adjacent to said region, where said complementary configurations fit together. mutually to block the displacement of the tubular conduit with respect to the piece by at least one plane parallel to a plane that includes said region.
    According to an implementation of said variant, said complementary configurations comprise at least one recess and at least one protuberance arranged respectively in the projection and in the area of one of the two opposite surfaces that is adjacent to said region, or vice versa.
    Advantageously, the complementary configurations comprise two or more recesses distributed within a foreground, angularly separated from each other, and two or more corresponding protrusions distributed within a background, angularly separated from each other, where the recesses and protuberances are arranged respectively in the at least one projection and in said area of one of the two opposite surfaces that is adjacent to said region, or vice versa.
    In general, the projection is an integral part of the tubular conduit, although alternatively this is a separate element that is attached to the tubular conduit.
    According to a preferred embodiment, the heat exchanger of the first aspect of the present invention comprises an inlet duct and / or an outlet duct for the cooling fluid, in which the at least one tubular duct is at least one of said inlet and outlet ducts for the refrigerant fluid, and the heat exchanger block comprises a housing that houses both of said first and second fluid circuits inside, where at least one wall of the housing constitutes the foregoing At least one piece mentioned.
    That is to say that, for said preferred embodiment, the inlet and / or the coolant outlet duct is fixed to the outer surface of the wall (or walls, in the case of fixing more than one duct) of the housing as explained above, that is, fixing the projection or projections to the region surrounding the through hole (or holes) for the inlet and / or outlet of the cooling fluid defined in said wall (or walls).
    In the case described in the previous paragraph, the tubular conduit would be connected to the previously called second fluid circuit for the circulation of a refrigerant fluid.
    For other exemplary embodiments, the tubular conduit is another different from that indicated in the said preferred embodiment, such as a conduit (or more than one) forming part of any of said first and second fluid circuits, or a conduit connected to any of them. For such embodiments, the previously called part is a wall of the housing or any other element that is part of the heat exchanger block (or even of an element coupled thereto).
    For one such embodiment, the conduit is one or each tube for the passage of gases from a parallel tube bundle (of the first fluid circuit) and the part is a support plate fixed at one end of the housing to the that said tubes are fixed for the passage of gases.
    For another such embodiment, the tubular conduit is the housing itself, which adopts a hollow prism or cylinder shape, and the part is a support plate between two of which the housing is fixed at their respective opposite ends.
    The present invention also concerns, in a second aspect, a method of manufacturing a gas heat exchanger according to the first aspect, which comprises sequentially performing the following steps:
    a) position the at least one tubular conduit with respect to the at least one piece, so that the at least one projection is in contact with said region of one of the two opposite surfaces and properly positioned for fixing thereto, and the end of the tubular conduit from which the at least one projection extends radially outwardly encompasses the through hole; Y
    b) fix the at least one projection to said region of one of the two opposite surfaces.
    According to an embodiment of the method of the second aspect of the present invention, said step a) is carried out using the positioning means described above in relation to the first aspect of the present invention.
    For an exemplary embodiment of the method of the second aspect of the present invention, said step b) is carried out by laser welding.
    Brief description of the drawings
    The foregoing and other advantages and features will be more fully understood from the following detailed description of some embodiments with reference to the attached drawings, which should be taken by way of illustration and not limitation, in which:
    Figure 1 is a perspective view illustrating the heat exchanger proposed by the first aspect of the present invention for an exemplary embodiment for which it incorporates a cooling fluid inlet or outlet conduit welded to the outer surface of a wall. of the exchanger housing;
    Figure 2 is an enlarged detail of a cross section of part of Figure 1, in particular of the tubular conduit and a portion of the outer wall of the housing to which it is welded;
    Figures 3A and 3B are enlarged views of details A and B, respectively, indicated in Figure 2.
    Detailed description of some embodiments
    An attached embodiment of the heat exchanger for gases of the first aspect of the invention for which it comprises, as seen in Figure 1, a heat exchanger block B comprising a housing and which is shown in the attached Figures inside it houses a first fluid circuit for the circulation of gases and a second fluid circuit for the circulation of a refrigerant fluid, in which the first and second fluid circuits are fluidly isolated from each other and arranged for an exchange of heat between the gases and the cooling fluid, where the housing and comprises a wall constituting the previously called part P having a through hole h (see Figures 2, 3A and 38) that crosses the wall P, between two respective opposite surfaces Pa, Pb (See Figures 3A and 38) thereof.
    Although not seen in the Figures, the through hole h is arranged in such a way that, in this case, the refrigerant fluid flows therethrough, that is, it is connected to the second fluid circuit.
    The heat exchanger block B also comprises an inlet conduit T of refrigerant fluid (and an outlet, not illustrated) connected to the wall P of the housing e in such a way that it is in fluidic communication with the through hole h, i.e. It is connected to the second fluid circuit.
    As can be seen in the attached Figures, the tubular conduit T comprises a projection F that takes the form of a continuous perimeter flange that extends radially outward from an end Ta of the tubular conduit T.
    Preferably, the cooling fluid outlet duct (not shown) is also configured and connected to a wall of the housing and in a similar way to that of the inlet, that is to say through a corresponding projection.
    On the other hand, for another embodiment, alternatively or complementary to that explained with reference to the cooling fluid inlet conduit, the housing itself and constitutes a tubular conduit that includes a projection (not illustrated) in one or both of its two ends, configured and attached to a respective support plate J according to the present invention.
    The projection F is preferably connected by laser welding to a region of one of the two opposite surfaces Pa, Pb that surrounds the through hole h, in particular to the outer surface Pa, although as can be seen in Figures 3A and 3B, the joint is not merely superficial, but the welding bead w crosses part of the thickness of the wall P, without actually crossing it completely.
    As can be seen in the attached Figures, especially in Figures 3A and 38, both the surface of the projection F intended to come into contact with the region of the surface Pa that surrounds the hole h as the said region are substantially flat.
    It can also be seen in the attached Figures how the heat exchanger of the first aspect of the present invention comprises positioning means for positioning the tubular conduit T with respect to the wall P of the housing e, so that the projection F is in contact with the region of the surface Pa surrounding the through hole h, and properly positioned to be fixed thereto, and the end Ta of the tubular conduit T encompasses the through hole h.
    Such positioning means comprise, for the illustrated embodiment, complementary configurations which in turn comprise two or more recesses R distributed within a foreground, angularly spaced from each other, and two or more corresponding protrusions S distributed within a background. , angularly separated from each other, where, as shown in Figure 1, the recesses R are arranged at different points of the perimeter flange constituting the projection F and the protuberances S in an area of the surface Pa that is adjacent to the mentioned region on which the projection is fixed
    F. In this case, although only two recesses R and two respective protuberances S are shown in Figure 1, three recesses R and three respective protuberances S are arranged (although one of each is hidden by the tubular conduit T in Figure 1), angularly separated about 120 degrees from each other.
    In Figure 3A it can be seen how the protuberance S there illustrated has been obtained by drawing, deforming an area of the wall P. However, for other embodiments (not illustrated), such protuberance S is obtained without deforming the wall P, either adding it when manufacturing the housing and as an integral part thereof, or in the form of an independent element fixed to the wall P.
    When positioning the tubular conduit T, the protuberances S fit into the recesses R, so that the displacement of the tubular conduit T with respect to the wall P of the housing e is blocked, by a plane parallel to a plane that includes the region where the projection F will be fixed, that is to say by a plane parallel to the wall P. In this way, it is possible to proceed to the remote laser welding without the tubular conduit T moving.
    However, if there is any small movement of the tubular conduit T, or it is not perfectly positioned (for example, because there is some clearance or play between each recess R and each protuberance S), the design of the exchanger of the first aspect of the present invention , in particular of the projection F and the wall P, allows such small movements or variations in the positioning of the parts to be welded to be absorbed, whereby the associated fixing procedure can be considered of a robust nature.
    Such a fixing procedure, by remote welding, has allowed the present inventors to achieve optimum working cycles of only 2.5 seconds to completely weld each tubular conduit T to the wall P, which implies a very large reduction in processing costs compared to conventional solutions.
    Likewise, as can be seen in Figures 3A and 38, the welding bead w penetrates completely into the projection F, crossing it completely, so that if there is any
    5 clearance between it and the surface Pa, it is completely absorbed, that is to say the two pieces are perfectly welded even without the surfaces in contact are not completely flat and / or completely parallel.
    In Figures 3A and 38, two dimensions 01 and 02 have been indicated, relative to the width and depth of the welding bead w, respectively, which are adjustable according to the design of the required exchanger, in particular the technical specifications that you must have or operational requirements that you must meet. In any case, in such Figures it can be seen how the welding bead W completely crosses the thickness of the projection F and a part of the thickness of the wall P (approximately half in the illustrated embodiment), which ensures a very good joint , far superior in terms of resistance than
    15 provided by testa joints in the prior art.
    On the other hand, the manufacture of the tubular conduit T is simpler than that of the standard conduits and requires the use of less material, since, on the one hand, the conduit can be shorter by not needing an end portion that enters in the through hole of the part P and, on the other, it is not the main body of the conduit that is welded but the projection
    20 F.
    Also, the manufacture of the exchanger proposed by the first aspect of the present invention, according to the method of the second aspect, is easily integrable in an automatic welding process, the design is less expensive than that of the conventional ones, and the cost of processing and the one associated with the work cycle is drastically reduced as well
    25 compared to conventional ones.
    A person skilled in the art could introduce changes and modifications in the described embodiments without departing from the scope of the invention as defined in the appended claims.
    权利要求:
    Claims (14)
    [1]
    1. Heat exchanger for gases, especially for exhaust gases of an engine, comprising:
    - a heat exchanger block (B) comprising:
    5 -a first fluid circuit for the circulation of gases and a second fluid circuit for the circulation of a refrigerant fluid, in which the first and second fluid circuits are fluidically isolated from each other and arranged for a heat exchange between said gases and said cooling fluid;
    - at least one piece (P) having a through hole (h) that crosses a wall of 10 said at least one piece (P), in which said through hole (h) is arranged such that said gases or said fluid refrigerant flow through it; Y
    - at least one tubular con duct (T) attached to said at least one piece (P) such that it is in fluidic communication with said through hole (h);
    characterized in that said at least one tubular duct (T) comprises at least one
    15 projection (F) extending radially outwardly from one end (Ta) of the at least one tubular conduit (T), and because said at least one projection (F) is attached to at least one region of one of two opposite surfaces (Pa, Pb) of said wall, where said region surrounds said through hole (h).
    [2]
    2. Heat exchanger according to claim 1, wherein said at least one projection (F) 20 is a continuous perimeter flange.
    [3]
    3. Heat exchanger according to claim 1, comprising a plurality of said at least one projection (F) arranged in the same plane and extending radially outward from different angular positions of said end (Ta) of the at least one tubular duct (T).
    4. Heat exchanger according to any one of the preceding claims, wherein at least one surface of said at least one projection (F) intended to come into contact with said region of one of said two opposite surfaces (Pa, Pb ) is substantially flat.
    [5]
    5. Heat exchanger according to any one of the preceding claims, wherein at least said region of one of said two opposite surfaces (Pa, Pb) is substantially flat.
    [6]
    6. Heat exchanger according to any one of the preceding claims, comprising positioning means for positioning said at least one tubular duct
    (T) with respect to said at least one piece (P), so that the at least one projection (F) is in contact with said region of one of said two opposite surfaces (Pa, Pb) and properly positioned to be fixed thereto, and the end (Ta) of the tubular duct
    (T) from which the at least one projection (F) extends radially outwardly encompasses the through hole (h).
    [7]
    7. Heat exchanger according to claim 6, wherein said positioning means comprise complementary configurations, arranged respectively in the at least one projection (F) and in an area of one of the two opposite surfaces (Pa, Pb) which it is adjacent to said region, in which said complementary configurations fit together to block the displacement of the at least one tubular conduit (T) with respect to the at least one part (P) by at least one plane parallel to a plane that includes said region.
    [8]
    8. Heat exchanger according to claim 7, wherein said complementary configurations comprise at least one recess (R) and at least one protuberance (8) arranged respectively in the at least one projection (F) and in said area of a of the two opposite surfaces (Pa, Pb) that is adjacent to said region, or vice versa.
    [9]
    9. Heat exchanger according to claim 8, wherein the complementary configurations comprise two or more recesses (R) distributed within a foreground, angularly separated from each other, and two or more corresponding protrusions (8) distributed within a background, angularly separated from each other, where the recesses
    (R) and protuberances (8) are arranged respectively in the at least one projection (F) and in said area of one of the two opposite surfaces (Pa, Pb) that is adjacent to said region,
    or vice versa .
    [10]
    10. Heat exchanger according to any one of the preceding claims, wherein the at least one projection (F) is connected to said region of one of the two opposite surfaces (Pa, Pb) by laser welding.
    [11]
    11. Heat exchanger according to any one of the preceding claims, wherein said at least one projection (F) is an integral part of said at least one tubular duct (T).
    [12]
    12. Heat exchanger according to any one of claims 1 to 10, wherein said at least one projection (F) is a separate element that is connected to said at least one tubular conduit (T).
    [13]
    13. Heat exchanger according to any one of the preceding claims, which
    5 comprises an inlet duct and / or an outlet duct for said cooling fluid,wherein said at least one tubular duct (T) is at least one of said ducts ofinlet and outlet for said refrigerant fluid, and in which said exchanger block ofheat (B) comprises a housing (C) that houses both of said first andsecond fluid circuits, where at least one wall of said housing (C) constitutes said
    10 at least one piece (P).
    [14]
    14. Method of manufacturing a heat exchanger for gases according to any of the preceding claims, comprising sequentially performing the following steps:
    a) positioning said at least one tubular conduit (T) with respect to said at least one piece (P), so that the at least one projection (F) is in contact with said region of one of
    Said two opposite surfaces (Pa, Pb) and properly positioned for fixing thereto, and the end (Ta) of the tubular duct (T) from which the at least one projection (F) extends radially outwardly encompasses the through hole (h); Y
    b) fix the at least one projection (F) to said region of one of the two opposite surfaces (Pa,
    Pb).
    15. Method according to claim 14, wherein said step a) is performed using the positioning means of any one of claims 6 to 8.
    [16]
    16. Method according to claim 14 or 15, wherein said step b) is performed by laser welding.
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    同族专利:
    公开号 | 公开日
    EP3577405A1|2019-12-11|
    CN110325809A|2019-10-11|
    WO2018141808A1|2018-08-09|
    CN110325809B|2021-12-24|
    ES2677366B1|2019-05-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1862796A|1931-06-24|1932-06-14|Jr Jesse C Martin|Flange and connection for tubular heating elements|
    GB416201A|1933-10-27|1934-09-13|Chase Companies Inc|Improvements in or relating to branch-fittings for water tubes and the like|
    US20090152865A1|2007-12-13|2009-06-18|Benteler Automobiltechnik Gmbh|Method of producing a tube connection, and tube connection|
    US4026456A|1976-01-15|1977-05-31|Modine Manufacturing Company|Method of attaching a tube to a wall|
    FR2772875B1|1997-12-23|2000-03-03|Valeo Thermique Moteur Sa|DEVICE FOR CONNECTING A FLEXIBLE PIPE TO A WALL, IN PARTICULAR A MOTOR VEHICLE HEAT EXCHANGER|
    DE10247264A1|2002-10-10|2004-04-29|Behr Gmbh & Co.|Plate heat exchanger in stack construction|
    US6899169B1|2004-07-02|2005-05-31|Richard D. Cox|Plastic heat exchanger|
    DE102005053924B4|2005-11-11|2016-03-31|Modine Manufacturing Co.|Intercooler in plate construction|
    CN101997095B|2009-08-26|2014-09-24|比克国际有限公司|Battery combination cover and battery|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730110A|ES2677366B1|2017-01-31|2017-01-31|HEAT EXCHANGER FOR GASES, ESPECIALLY FOR EXHAUST GASES OF AN ENGINE, AND MANUFACTURING METHOD OF THE ENGINE|ES201730110A| ES2677366B1|2017-01-31|2017-01-31|HEAT EXCHANGER FOR GASES, ESPECIALLY FOR EXHAUST GASES OF AN ENGINE, AND MANUFACTURING METHOD OF THE ENGINE|
    PCT/EP2018/052430| WO2018141808A1|2017-01-31|2018-01-31|Heat exchanger for gases, in particular for exhaust gases from an engine, and method for manufacturing same|
    CN201880009558.2A| CN110325809B|2017-01-31|2018-01-31|Heat exchanger for gases and method for producing the same|
    EP18704182.7A| EP3577405A1|2017-01-31|2018-01-31|Heat exchanger for gases, in particular for exhaust gases from an engine, and method for manufacturing same|
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