• 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:
    Methods for the manufacture of an assembly formed by a gas conduction unit and a particle filter and for the manufacture of a heat exchanger for gases, and heat exchanger and assembly manufactured according to the methods. The methods comprise manufacturing, respectively, an assembly formed by a gas conduction unit and a particulate filter (7) and an exchanger that includes such an assembly, applying a brazing inhibitor compound (P) on at least part of the filter of particles (7) and/or on at least some regions of the gas conduction unit that are adjacent to the particulate filter (7), to prevent the flow of at least one brazing filler material over the particulate filter (7) and wetting thereof with at least said brazing filler material. The assembly and the exchanger that includes it are manufactured according to the methods of the present invention. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2676710A1
    申请号:ES201730079
    申请日:2017-01-23
    公开日:2018-07-24
    发明作者:Benjamín GRACIA LAZARO；Darío PEÑA SÁNCHEZ；Carmen LARROSA LACUEY；Iñigo TOLOSA ECHARRI
    申请人:Valeo Termico SA；
    IPC主号:
    专利说明:

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    METHODS FOR THE MANUFACTURE OF AN ASSEMBLY FORMED BY A GAS DRIVING UNIT AND A PARTICLE FILTER AND FOR THE MANUFACTURE OF A HEAT EXCHANGER FOR GASES, AND ASSEMBLY AND HEAT EXCHANGER MANUFACTURED ACCORDING TO THE METHODS
    Technical sector
    The present invention concerns, in a first aspect, a method for the manufacture of an assembly formed by a gas conduction unit and a particulate filter, for a gas heat exchanger, in particular for the exhaust gases of an engine , which comprises protecting the particulate filter against corrosion by the action of a brazing filler.
    A second aspect of the present invention concerns an assembly formed by a gas conduction unit and a particulate filter, for a gas heat exchanger, in particular for exhaust gases of an engine, in which the particulate filter and / or adjacent regions of the gas conduction unit are protected against corrosion caused by a strong weld filler material
    A third aspect of the present invention concerns a heat exchanger for gases, in particular for exhaust gases of an engine, comprising a heat exchanger block and the whole of the second aspect.
    A fourth aspect of the present invention concerns a method for the manufacture of a heat exchanger for gases, in particular for exhaust gases of an engine, which comprises manufacturing a set by the method of the first aspect and fixing the driving unit of gases at one end of a heat exchanger block by a strong welding process.
    Prior art
    In some EGR exchangers (“Exhaust Gas Recirculation”: “Exhaust gas recirculation”), mainly in low pressure (LP) applications, the cleaning requirements are demanding, so the use of a particulate filter (not a soot filter) integrated in the exhaust line is increasingly in demand. Said filter is usually
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    consisting of an independent component or, in some cases, a component integrated with the EGR exchanger.
    The following patent documents propose heat exchangers with particle filters fixed or integrated in different parts of the exchanger.
    EP2273095B1 refers to a heat exchanger that includes a fluid filter integrated in said exchanger, which includes a filter area that protrudes from a flat surface. This filter is configured as a gasket and is assembled between the connection flange and the gas tank by means of hardware.
    Patent EP2194351B1 refers to a heat exchanger that includes a particulate filter for filtering the exhaust gases, structurally integrated within the gas inlet tube of the heat exchanger.
    Patent FR2938051B1 refers to a heat exchanger that includes a filter housed in a chosen position so that the filter is disposed near an end side of the tube bundle.
    Patent ES2421185B1, of the same holder as the present application, describes a heat exchanger comprising a gas tank provided with an inlet port attachable to one end of the housing and an outlet port connected to the gas recirculation line, and a particle filter attached to the inlet port of the gas tank preferably by arc or spot welding, and additionally, optionally, by oven welding.
    Patent ES2531124, also of the same holder as the present application, proposes a heat exchanger with a particulate filter for filtering the exhaust gases associated with the outlet port of the gas tank, and a sealing gasket arranged on a surface outside the flange or connection flange, where the filter is connected between the gas tank and the flange or connection flange by means of furnace welding, thus being integrated with the gas tank forming a single inseparable part capable of being coupled to the housing of the exchanger.
    In none of the existing and known designs it is proposed to protect the particulate filter against the brazing filler material used to weld other parts of the
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    heat exchanger, such as the gas tank to the heat exchanger block, so that in many cases the flow of such material over the particle filter causes corrosion thereof, which can even cause the particle filter to perforate. The risk of corrosion increases the closer to the particle filter the pieces to be joined by brazing.
    Therefore, it is necessary to offer an alternative to the state of the art that covers the gaps found therein, providing a solution that avoids the said corrosion of the particulate filter.
    Explanation of the invention.
    To this end, the present invention concerns a method for manufacturing an assembly formed by a gas conduction unit and a particulate filter, for a gas heat exchanger, in particular for engine exhaust, where The gas conduction unit is adapted to be fixed to one end of a heat exchanger block so that it is in fluid communication with the heat exchanger block for the passage of gases therethrough, in which the method comprises fixing inseparable from the particulate filter to the gas conduction unit to filter the exhaust gases passing through it.
    Unlike the methods known in the state of the art, the one proposed by the first aspect of the present invention typically comprises applying a strong welding inhibitor compound (or "stop-off" paint) on at least part of the particle filter and / or over at least some regions of the gas conduction unit that are adjacent to the particle filter, to prevent the flow of at least one brazing filler material over the particle filter and the wetting of the same with at least said brazing filler material.
    According to an embodiment of the method of the first aspect of the present invention, said strong welding inhibitor compound is also made to prevent the flow of a flux material on the particle filter and the wetting thereof with at least the aforementioned flux material
    For another embodiment, said application of the brazing inhibitor compound is carried out before the gas conduction unit is fixed to one end of a heat exchanger block by means of a brazing process, to prevent flow
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    of at least one brazing filler material, used in the aforementioned brazing process, on the particulate filter and the wetting thereof with at least said brazing filler material.
    According to an exemplary embodiment, said inseparable fixation of the particle filter to the gas conduction unit comprises fixing the particle filter to a gas tank of the gas conduction unit, in which said regions of the gas unit Gas conduction that are adjacent to the particulate filter are regions of the gas reservoir.
    According to a possible implementation of said exemplary embodiment, the inseparable fixing of the particle filter to the gas tank comprises the fixing of a peripheral wing of the particle filter to a perimeter flange of the gas tank surrounding an opening thereof, comprising The method of the first aspect of the invention is the application of the brazing inhibitor compound in regions of the particle filter and / or the gas tank adjacent to said perimeter wing.
    A second aspect of the present invention concerns an assembly formed by a gas conduction unit and a particulate filter, for a gas heat exchanger, in particular for exhaust gases of an engine, where the gas conduction unit it is adapted to be fixed to one end of a heat exchanger block so that it is in fluidic communication with the heat exchanger block for the passage of gases therethrough, and where the particle filter is inseparably fixed to the gas conduction unit to filter the exhaust gases that pass through it.
    Unlike the assemblies known in the state of the art, in that proposed by the second aspect of the present invention at least part of the particle filter and / or at least some regions of the adjacent gas conduction unit to the particulate filter they are covered with a strong welding inhibitor compound to prevent the flow of at least one strong welding filler material thereon and the wetting thereof with at least said brazing filler material.
    A third aspect of the present invention concerns a heat exchanger for gases, in particular for exhaust gases of an engine, comprising:
    - a heat exchanger block intended for the circulation of gases with a heat exchange with a cooling fluid; Y
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    - an assembly formed by a gas conduction unit and a particle filter according to the second aspect of the present invention, in which the gas conduction unit is fixed by welding to one end of the heat exchanger block so that It is in fluidic communication with the heat exchanger block for the passage of gases through it.
    A fourth aspect of the present invention concerns a method for manufacturing a heat exchanger for gases, in particular for exhaust gases of an engine, comprising:
    - manufacturing an assembly formed by a gas conduction unit and a particle filter according to the method of the first aspect; Y
    - fix the gas conduction unit to one end of a heat exchanger block by means of a strong welding process.
    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 an exploded perspective view including a gas tank (shown sectioned for clarity purposes) and a particulate filter with a strong welding inhibitor compound disposed over an adjacent area (P mark) to the inner edge of a peripheral wing thereof to be fixed to a perimeter flange of the gas tank, according to an exemplary embodiment of the method of the first aspect of the invention and of the whole of the second aspect.
    Figure 2 shows, by a partial schematic elevational view, the heat exchanger of the third aspect of the present invention, for an exemplary embodiment.
    Figure 3 shows two views of the assembly of the second aspect of the invention, in particular a top view corresponding to a front elevation of the assembly and a bottom view corresponding to a cross-section according to a plane passing along the line AA of the view above, where the assembly has been manufactured according to the method of the first aspect of the present invention for an exemplary embodiment for which the strong welding inhibitor compound is disposed on the gas tank (P mark), in particular on an area adjacent to the outer edge of the peripheral wing of the particle filter.
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    Detailed description of some embodiments
    Figures 1 and 3 illustrate two embodiments of the assembly of the second aspect of the invention, which is formed by a gas conduction unit and a particle filter 7, for a gas heat exchanger, in particular for Exhaust gases of an engine, manufactured by the method of the first aspect.
    In the aforementioned Figures only a part of the gas conduction unit has been illustrated, in particular a gas tank 6 to which the particle filter 7 is fixed inseparably.
    For the exemplary embodiment illustrated in Figure 1, said fixing is carried out by fixing a peripheral wing 9 of the particle filter 7 to a perimeter flange 10 of the gas tank 6 surrounding an opening thereof, and the inhibitor compound of brazing P has been applied over an area adjacent to the entire inner edge of the peripheral wing 9, in order to act as a barrier against the brazing filler material and / or the flow of a flux material, if applicable.
    On the other hand, for the embodiment of Figure 3, the fixing of the particle filter 7 to the gas tank 6 is carried out by fixing the perimeter wing 9 thereof within the gas tank 6, in particular in the inner wall thereof. In this case, the strong welding inhibitor compound P has been applied on the gas tank 6, in particular on an area adjacent to the entire outer edge of the peripheral wing 9 of the particle filter 7, to provide a barrier against the material of brazing filler and / or flux of a flux material, if applicable, thus preventing it from flowing into the particle filter 7, including both the central zone 8 and the peripheral wing 9.
    In general, the joining of the particulate filter 7 to the gas tank 6 is not done by brazing, but exclusively by another kind of welding, such as electric spot or laser. Therefore, the protection conferred by the brazing inhibitor compound is faced with the brazing filler material and / or the flow of a flux material that may come from the union of other parts, such as the gas tank 6 to other pieces (manifold, heat exchanger block, etc.).
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    Therefore, the embodiment of Figure 3 is preferred, since applying the inhibitor compound from outside the particle filter 7 completely protects it, not only the central zone 8, of the brazing filler material and / or of the flow of a flux material that may come from the union of these other pieces. In addition, the surface of the particle filter 7 is irregular, so it is easier, faster and therefore cheaper to paint the smooth surface of the gas tank 6.
    In any case, the area where the inhibitor compound P will be applied will depend on the space available between the outside of the filter and the location of the brazing filler material.
    Finally, Figure 2 shows, in part, the heat exchanger 1 of the third aspect of the present invention, for an exemplary embodiment for which it comprises:
    - a heat exchanger block 3 that includes a bundle of tubes 2 through which gases circulate with a heat exchange with a cooling fluid, the ends of the tubes 2 being fixed to two support plates 5 (only one of they); Y
    - an assembly formed by a gas conduction unit and a particulate filter 7, in which the gas conduction unit includes a gas tank 6 fixed by welding to one end of the heat exchanger block 3, in particular a one of the support plates 5, so that it is in fluidic communication with the heat exchanger block 3 for the passage of gases therethrough from an inlet end 4 to an outlet end (not illustrated).
    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 (8)
    [1]
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    1 Method for the manufacture of an assembly consisting of a gas conduction unit and a particulate filter (7), for a gas heat exchanger, in particular for exhaust gases of an engine, the gas conduction unit being adapted to be fixed to one end of a heat exchanger block so that it is in fluidic communication with the heat exchanger block for the passage of gases therethrough, in which the method comprises the inseparable fixation of the particle filter (7) to the gas conduction unit to filter the exhaust gases passing through it, characterized in that it comprises applying a strong welding inhibitor compound (P) on at least part of the particle filter (7) and / or on at least about regions of the gas conduction unit that are adjacent to the particle filter (7), to prevent the flow of at least one brazing filler material over the particle filter (7) and wetting it with at least said brazing filler material.
    [2]
    2. - Method according to claim 1, comprising selecting and applying as said brazing inhibitor compound (P) a compound that is also made to prevent the flow of a flux material on the particle filter (7) and the wetting it with at least said melting material.
    [3]
    3. - Method according to any one of the preceding claims, wherein said application of said brazing inhibitor compound (P) is carried out before the gas conduction unit is fixed to one end of a heat exchanger block ( 3) by means of a brazing process, to prevent the flow of at least one brazing filler material used in said brazing process on the particle filter (7) and the wetting thereof with at least said blister material strong welding.
    [4]
    4. - Method according to any one of the preceding claims, wherein said inseparable fixation of the particle filter (7) to the gas conduction unit comprises fixing the particle filter (7) to a gas tank (6) of the gas conduction unit, wherein said regions of the gas conduction unit that are adjacent to the particle filter (7) are regions of the gas tank (6).
    [5]
    5. - Method according to claim 4, wherein said inseparable fixing of the particle filter (7) to the gas tank (6) comprises fixing a peripheral wing (9) of the particle filter (7) to a perimeter flange (10) of the gas tank (6) surrounding an opening thereof,
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    the method comprising the application of said brazing inhibitor compound (P) in regions of the particle filter (7) and / or the gas tank (6) adjacent to said perimeter wing (9).
    [6]
    6. - Assembly formed by a gas conduction unit and a particulate filter (7), for a gas heat exchanger, in particular for exhaust gases of an engine, the gas conduction unit being adapted to be fixed at one end of a heat exchanger block (2) so that it is in fluidic communication with the heat exchanger block for the passage of gases therethrough, and the particle filter (7) being fixed inseparably to the gas conduction unit for filtering the exhaust gases passing through it, characterized in that at least part of the particle filter (7) and / or at least some regions of the gas conduction unit that are adjacent to the gas filter particles (7) are covered with a strong welding inhibitor compound (P) to prevent the flow of at least one strong welding filler material thereon and the wetting thereof with at least said mater Strong welding filler.
    [7]
    7. - Heat exchanger for gases, in particular for exhaust gases of an engine, comprising:
    - a heat exchanger block (3) intended for the circulation of gases with a heat exchange with a cooling fluid; Y
    - an assembly formed by a gas conduction unit and a particle filter (7) according to claim 6, wherein the gas conduction unit is fixed by welding to one end of said heat exchanger block (3) so that it is in fluidic communication with the heat exchanger block (3) for the passage of gases through it.
    [8]
    8. - A method for manufacturing a heat exchanger for gases (1), in particular for exhaust gases of an engine, comprising:
    - manufacturing an assembly formed by a gas conduction unit and a particle filter (7) according to the method of any one of claims 1 to 5; Y
    - fix the gas conduction unit to one end of a heat exchanger block (3) by means of a strong welding process.
    类似技术:
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    ES2399036B1|2014-01-28|HEAT EXCHANGER FOR GASES IN SPECIAL EXHAUST GASES OF A MOTOR.
    KR20060067639A|2006-06-20|Radiator in a car
    ES2677366B1|2019-05-14|HEAT EXCHANGER FOR GASES, ESPECIALLY FOR EXHAUST GASES OF AN ENGINE, AND MANUFACTURING METHOD OF THE ENGINE
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    同族专利:
    公开号 | 公开日
    ES2676710B1|2019-05-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2002045896A1|2000-12-05|2002-06-13|Norsk Hydro Asa|Process of connecting a heat exchanger tube to a manifold and tube especially made therefor|
    EP2239530A1|2009-04-09|2010-10-13|Maruyasu Industries Co., Ltd.|Multitubular heat exchanger|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201730079A|ES2676710B1|2017-01-23|2017-01-23|METHODS FOR THE MANUFACTURE OF A SET FORMED BY A GAS CONDUCTION UNIT AND A FILTER OF PARTICLES AND FOR THE MANUFACTURE OF A HEAT EXCHANGER FOR GASES, AND HEAT EXCHANGER AND HEAT EXCHANGER MANUFACTURED ACCORDING TO THE METHODS|ES201730079A| ES2676710B1|2017-01-23|2017-01-23|METHODS FOR THE MANUFACTURE OF A SET FORMED BY A GAS CONDUCTION UNIT AND A FILTER OF PARTICLES AND FOR THE MANUFACTURE OF A HEAT EXCHANGER FOR GASES, AND HEAT EXCHANGER AND HEAT EXCHANGER MANUFACTURED ACCORDING TO THE METHODS|
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