Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
  • F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
  • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
  • F02M26/30—Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
  • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
  • F28D1/05308—Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D21/0001—Recuperative heat exchangers
  • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/02—Header boxes; End plates

Definitions

• the present invention relates to a heat exchanger for gas, in particular for the exhaust gases of an engine.
• the invention is particularly applicable in heat exchangers of engine exhaust gas recirculation (EGRC).
• EGRC engine exhaust gas recirculation
• the main function of the EGR exchangers is the exchange of heat between the exhaust gas and the coolant, in order to cool the gases.
• EGR heat exchangers are widely used for diesel applications to reduce emissions and are also used in gasoline applications to reduce fuel consumption.
• EGR exchangers on the market is a metal heat exchanger typically made of stainless steel or aluminum.
• EGR heat exchanger there are two types: a first type consists of a housing inside which there is a bundle of parallel tubes for the passage of gases, the refrigerant circulating in the housing, outside tubes, and the second type consists of a series of parallel plates which constitute the heat exchange surfaces, so that the exhaust gases and the refrigerant circulate between two plates, in alternating layers, with the possibility of include fins to improve heat exchange.
• the assembly between the tubes and the housing can be of different types.
• the tubes are fixed at their ends between two support plates connected to each end of the housing, the two support plates having a plurality of orifices for the installation of the respective tubes.
• connection means with the recirculation line which may consist of a V-shaped connection or a peripheral collar or flange, depending on the design of the recirculation line in which is connected the exchanger.
• the peripheral collar can be assembled with a gas tank, so that the gas tank is an intermediate piece between the housing and the collar, or the collar can be assembled directly to the housing.
• EGR exchangers In both types of EGR exchangers, most of their components are metallic, so that they are assembled by mechanical means and then oven-welded or arc-welded or laser-welded to ensure the proper sealing required this application.
• Some EGR exchangers also include a filter in the exhaust line, which is usually an independent component, although it can be partially integrated into the EGR exchanger.
• Patent EP2273095 relates to a heat exchanger comprising a liquid filter integrated in said exchanger, which comprises a filter zone protruding from a flat surface.
• This filter is configured as a gasket and is mounted between the connection flange and the gas tank by means of hardware.
• EP2194351 relates to a heat exchanger comprising a particulate filter for filtering exhaust gas, structurally integrated inside the gas inlet tube of the heat exchanger.
• Patent FR2938051 relates to a heat exchanger which comprises a filter housed in a selected position so that the filter is disposed near an extreme side of the tubular bundle.
• these filters have the disadvantage of requiring a difficult and slow assembly process since additional seals and fastening by means of the fasteners are used.
• their volume increases the dimensions of the exchanger, with the resulting problems for mounting in the engine compartment.
• the purpose of the gas heat exchanger, in particular the exhaust gases of an engine, according to the present invention is to solve the disadvantages that exchangers known in the art present by offering a more economical particulate filter. and easy to assemble in the exchanger.
• the gas heat exchanger in particular the exhaust gas of an engine, object of the present invention is of the type comprising a bundle of tubes arranged inside a housing, intended for the circulation of gases with exchange heat with a heat transfer fluid, at least one gas reservoir that can be adjusted at one end of the housing and connected to the gas recirculation line and a particulate filter for filtering the exhaust gas, associated with said gas tank, and it is characterized in that said filter is integrated in the gas tank and forms a single piece inseparable to be fitted to the housing of the exchanger.
• the filter is integrated into the gas reservoir by welding. This provides a simpler attachment of the filter to the gas tank, since it is not necessary for the filter to have a metal collar or intermediate fasteners, nor any hardware elements, to be assembled to the tank. gas, as happened with the known filters.
• the gas tank can be assembled directly by furnace brazing to the core of the heat exchanger and it is not necessary to use a separate piece assembled by hardware elements as in the prior art.
• the filter is assembled to the gas tank by spot welding or arc welding.
• the filter is further assembled to the gas tank by oven brazing.
• a spot or arc welding is sufficient to ensure correct filter attachment. Nevertheless, it is possible to improve the fixing by additional brazing.
• the filter comprises a concave configuration screen as a plate, with a flat peripheral flange provided for assembly in one piece with the gas tank.
• the configuration in the form of a concave screen makes it possible to increase the filtration area and, on the other hand, the flat surface of the peripheral flange makes it easier to attach the filter to the gas tank by welding, without the need for intermediate pieces. nor hardware elements.
• the gas reservoir comprises a flat peripheral edge in its inner part, intended to receive the peripheral wing of the filter for their assembly to one another. In this way, it ensures a permanent and robust welding between the two parts.
• a more economical and easier to manufacture filter is formed, formed only by the filtration screen which comprises the peripheral wing made of the same material. Nevertheless, if desired one can also include a metal plane around the screen.
• the integration of the filter simplifies the design of the exchanger by eliminating the need to include a collar, a seal and hardware. The result is a significant reduction in the cost of assembly.
• the integration of the filter with the gas tank implies a smaller volume of the heat exchanger compared to other solutions that require a collar or an additional part.
• Figure 1 is a schematic view in partial longitudinal section of a heat exchanger, showing the filter fitted to the gas reservoir, according to the invention
• Figure 2 is a perspective view of the filter according to the invention.
• Figure 3 is a perspective view of the gas tank showing the peripheral interlocking edge for receiving the filter
• FIG. 4 and 5 show two perspective and exploded views of the filter and the gas tank in section; and FIG. 6 is a perspective view according to FIG. 4 with the filter integrated in the gas tank.
• FIG. 1 is a partial representation of a heat exchanger 1 which comprises a bundle of tubes 2 disposed inside a housing 3, delimiting an inlet 4 and a gas outlet, said tubes 2 being intended for the circulation of gas with heat exchange with a heat transfer fluid.
• the tubes 2 are fixed at their ends between two support plates 5 fitted to each end of the casing 3, the two support plates 5 having a plurality of orifices for the installation of the respective tubes 2.
• the exchanger 1 comprises a gas reservoir 6 fitted to the housing 3 at the gas inlet end 4 and connected to the gas recirculation line.
• the exchanger 1 also comprises a particulate filter 7 for filtering the exhaust gas, integrated in the gas reservoir 6 and forming a single inseparable piece that can be fitted to the housing 3 of the exchanger. In this way, by obtaining a single piece, it facilitates its assembly to the housing 3 of the exchanger 1.
• the filter 7 is integrated in the gas tank 6 by welding, whether by spot welding or by arc welding. This provides a fixation of the filter 7 to the gas tank 6 simpler, since it is not necessary that the filter 7 has a metal collar or intermediate fixing parts, and more than hardware, to be assembled to the gas tank 6.
• the filter 7 comprises a screen 8 of concave configuration as a plate, with a flat peripheral flange 9 provided for its assembly in one piece with the gas tank 6.
• the configuration in the form of a concave screen 8 makes it possible to increase the filtration area and, on the other hand, the plane surface of the peripheral flange 9 facilitates the fixing of the filter 7 to the gas reservoir 6 by welding, without i need intermediate parts or hardware.
• the gas tank 6 comprises in its inner part a flat peripheral edge 10 intended to receive the peripheral flange 9 of the filter 7 in order to assemble them to one another. In this way, it ensures a permanent and robust welding between the two parts.
• the gas reservoir 6 comprises another collar 1 1 intended to fit and assemble with the edge of the housing 3, as can be seen in FIG.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Exhaust-Gas Circulating Devices (AREA)

Applications Claiming Priority (2)

Publications (4)

Family

ID=47844273

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (7)

Family Cites Families (12)

• 2012
  • 2012-02-22 ES ES201230270A patent/ES2421185B1/es not_active Expired - Fee Related
• 2013
  • 2013-02-22 KR KR1020147022931A patent/KR20140120917A/ko active Search and Examination
  • 2013-02-22 EP EP13708372.1A patent/EP2817503B2/de active Active
  • 2013-02-22 WO PCT/EP2013/053587 patent/WO2013124431A1/fr active Application Filing
  • 2013-02-22 US US14/380,096 patent/US20150034056A1/en not_active Abandoned

Non-Patent Citations (1)

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