EP2972047A1 - Radiateur - Google Patents

Radiateur

Info

Publication number
EP2972047A1
EP2972047A1 EP14707782.0A EP14707782A EP2972047A1 EP 2972047 A1 EP2972047 A1 EP 2972047A1 EP 14707782 A EP14707782 A EP 14707782A EP 2972047 A1 EP2972047 A1 EP 2972047A1
Authority
EP
European Patent Office
Prior art keywords
gas
liquid
cooler
cooler according
liquid separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14707782.0A
Other languages
German (de)
English (en)
Inventor
Harald Rieger
Hartmut Sauter
Hartmut Sohla
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP2972047A1 publication Critical patent/EP2972047A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/005—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for draining or otherwise eliminating condensates or moisture accumulating in the apparatus
    • 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
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • 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
    • F02M26/13—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
    • F02M26/32—Liquid-cooled heat exchangers
    • 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
    • F02M26/35—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/02—Coatings; Surface treatments hydrophilic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/04—Coatings; Surface treatments hydrophobic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/18—Safety or protection arrangements; Arrangements for preventing malfunction for removing contaminants, e.g. for degassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/22—Safety or protection arrangements; Arrangements for preventing malfunction for draining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a cooler for cooling a gas flow, in particular an exhaust gas recirculation cooler for cooling recirculated exhaust gas.
  • the invention also relates to a use of such a cooler.
  • a cooler usually comprises a radiator block which has a gas path through which the gas flow can flow and a coolant path through which a coolant can flow, which are thermally coupled to one another in a media-separated manner.
  • exhaust gas recirculation in which exhaust gas from an exhaust system is externally supplied to a fresh air system to mix the recirculated exhaust gas with the fresh air upstream of combustion chambers of an internal combustion engine.
  • EGR exhaust gas recirculation
  • HP-EGR high-pressure exhaust gas recirculation
  • LP-EGR low-pressure exhaust gas recirculation
  • the compressor and turbine subdivide the fresh air system and the exhaust system into a high-pressure area and a low-pressure area.
  • the fresh air side low pressure region extends upstream of the compressor.
  • the fresh-air-side high-pressure region extends downstream of the compressor.
  • the exhaust side low pressure region extends downstream of the turbine.
  • the exhaust gas-side high-pressure region extends upstream of the turbine.
  • High-pressure exhaust gas recirculation (HD-EGR) thus takes place upstream of the turbine and downstream of the turbine Compressor.
  • LP EGR low-pressure exhaust gas recirculation
  • the exhaust gas may contain water in the form of water vapor, which may be produced by the combustion processes. Also may be contained in the sucked from the environment fresh air water in the form of water vapor.
  • the recirculated exhaust gas is usually cooled by means of an exhaust gas recirculation cooler, for example, to increase the mass flow of fresh air.
  • the recirculated exhaust gas can cool below the dew point of water, as a result of which condensation can occur, so that liquid water is obtained. This can form drops that can damage downstream following components. Both mechanical and corrosive damage is possible.
  • a compressor wheel which rotates in the compressor at high speed, is exposed by the collision with droplets of increased risk of damage. Furthermore, condensate can precipitate and freeze in adverse environmental conditions. Again, in particular, the compressor wheel is exposed to increased risk.
  • EGR coolers which can be integrated into a low-temperature cooling circuit (NT cooling circuit) for a particularly high cooling capacity, ie in particular in a liquid cooling circuit, preferably a conventional engine cooling circuit.
  • NT EGR coolers can be used, in particular in commercial vehicles, in the HD range or in the LP range, so that it is then NT-HD AGR cooler or NT-ND EGR cooler.
  • the exhaust gas may contain, besides the water vapor, various combustion residues which are present in particulate form. In particular, the combustion residues may contain carbon black, mineral components, ceramic particles or silicates.
  • Coolers of the type mentioned can also be used in buildings, in particular for air conditioning of the room air. Further possible uses of such coolers are, for example, battery cooling, e.g. in electric vehicles, or in connection with an air supply of fuel cells.
  • the respective gas flow may, in addition to liquids or condensate, also include solids, e.g. Dust, silicates (e.g., sand) or organic matter.
  • the present invention is concerned with the problem, for a cooler of the type mentioned, which may be designed in particular as exhaust gas recirculation cooler, to provide an improved embodiment or a novel use, which is characterized in that the risk of damage in the event of condensation Components is reduced.
  • the invention is based on the general idea of equipping the cooler with a liquid separator. With the aid of such a liquid separator, liquid can be separated from the gas flow, so that the gas flow emerging from the cooler contains no or only a reduced amount of liquid. Consequently, the risk of damage is reduced subsequent components.
  • the liquid separator is arranged on an outlet side of the gas path on the radiator block. This ensures that as much liquid as possible can be captured by the liquid separator, which accumulates within the gas path. Liquid, which precipitates in the gas path upstream of the outlet side, is transported by the gas flow in the direction of the outlet side and thus fed to the liquid separator.
  • the liquid separator may have a gas channel which has a channel cross-section through which the gas flow can pass and which is largely blocked by at least one deposition structure through which the gas flow can flow. Since the deposition structure completely or at least substantially obstructs the channel cross-section, the gas flow is forced to flow through the deposition structure. As a result, entrained liquid and / or solid impurities can accumulate on the deposition structure and be separated from the gas flow.
  • a collecting duct to the channel cross-section, which extends transversely to the gas channel, which is open to the gas channel and which is arranged so that a drip edge of the at least one deposition structure in the direction of gravity adjacent thereto.
  • the deposited impurities can be removed particularly easily from the deposition structure.
  • the respective drip edge is arranged outside the channel cross section of the gas channel and for this purpose within the collecting channel, whereby the dripping of the deposited impurities is improved in the collecting channel.
  • a drain line is connected to the collection channel to dissipate the deposited impurities, for example to a memory.
  • a drain line is connected to the collection channel to dissipate the deposited impurities, for example to a memory.
  • a drain line is connected to the collection channel to dissipate the deposited impurities, for example to a memory.
  • a drain line is connected to the collection channel to dissipate the deposited impurities, for example to a memory.
  • a drain line is connected to the collection channel to dissipate the deposited impurities, for example to a memory.
  • the respective deposition structure may be formed by a hydrophobic tissue.
  • a metal mesh e.g. made of steel or stainless steel.
  • ceramic fabrics are also conceivable.
  • a simplified structure results when the respective deposition structure is arranged on a carrier which extends transversely through the channel cross section.
  • the respective deposition structure itself can be relatively limp, which allows the use of materials and structures which have relatively low flow resistances and / or high separation effects.
  • the liquid separator may include a housing that contains the gas channel and that is attached to the radiator block.
  • the liquid separator represents a separate assembly, which can be particularly easy to grow on the radiator block as needed.
  • the gas path in the radiator block can have a plurality of wall surfaces, on which a liquid film can form.
  • the liquid separator then expediently immediately adjoins a gas-end-side end face of the radiator block which has the wall surfaces and conducts the liquid film therefrom.
  • the liquid separator serves primarily to receive and discharge the liquid film flowing along the wall surfaces, so that droplet formation in the gas stream can be avoided.
  • the liquid Separators also already deposited in the gas stream entrained droplets that can form, for example, already within the cooler.
  • the liquid separator may have webs which connect directly to the gas outlet side end face of the radiator block and direct the liquid film to a collecting structure of the liquid separator. With the aid of these webs is achieved that the liquid film, which can not flow along the gas outlet side end face of the radiator block along this end side due to gravity, but strikes the webs and is forwarded by them to the collecting structure.
  • the wall surfaces on which the liquid film is formed delimit individual gas passages in the radiator block, which can be arranged adjacent to one another, in particular, in the direction of the gravitational force. If a liquid film on a wall surface emerges from such a gas channel, gravity drives it in the direction of the next underlying gas channel. There, drops could form and be taken away by the gas flow. Since such a flow to the next gas channel can be prevented with the aid of the webs, droplet formation in the gas flow can thereby also be avoided efficiently.
  • the liquid separator may have a plate body which extends transversely to the gas flow, has gas passages aligned with gas outlet openings of the cooler block and from which the webs project.
  • the aforementioned gas ducts have the exit openings of the radiator block on the outlet side.
  • the fiber structure can have any structure suitable for receiving liquid, in particular also a hydrophobic structure.
  • the plate body may have a hydrophilic fiber structure that receives the liquid film.
  • the liquid separator may have Ableitspalte that connect transversely to the gas flow direction directly to the gas-side outlet ends of the wall surfaces, so that the liquid film from the respective wall surface can enter into the respective discharge gap and is derivable therein.
  • the discharge gaps ensure that the respective liquid film can flow away from the region of the gas flow transversely to the gas flow.
  • the respective liquid film can enter the respective discharge gap due to gravity.
  • it may be provided to dimension the respective discharge gap so that capillary forces suck in and discharge the liquid film into the discharge gap.
  • the Ableitspalte which extend transversely to the gas flow direction, are thus dimensioned parallel to the gas flow direction relatively small in order to use the capillary forces can.
  • the capillary forces cause a particularly efficient suction of the liquid film, without additional energy-consuming measures are required.
  • the liquid separator may have a fiber structure which adjoins the respective discharge gap and / or is arranged in the respective discharge gap.
  • the fiber structure can have any structure suitable for receiving and discharging liquid, in particular also a hydrophobic structure. However, it is preferably a hydrophilic fiber structure. The fibrous structure absorbs the liquid film and can pass it within the liquid separator.
  • the liquid separator may comprise a plate body which extends transversely to the gas flow, which has aligned through openings to gas outlet openings of the radiator block and which has a protruding web structure, which abut directly on the gas outlet side end face of the radiator block, so that the Ableitspalte by the gas outlet-side end face and a cooler block facing the inside of the plate body are limited.
  • the liquid separator is completed only by the attachment of the plate body on the radiator block and functional.
  • the liquid separator may have a fiber structure which extends completely over a gas outlet-side end side of the radiator block, which can be traversed by the gas flow and receives and discharges the liquid emerging from the gas path.
  • the fiber structure can have any structure suitable for receiving and discharging liquid, in particular also a hydrophobic structure. However, it is preferably a hydrophilic fiber structure.
  • the liquid separator has an extremely simple structure, which can be realized particularly inexpensively.
  • the fiber structure is arranged in the gas flow direction spaced from the radiator block. This ensures that the fiber structure provides substantially more volume that can be flowed through than with an arrangement of the fiber structure directly on the radiator block. As a result, the flow resistance of the fiber structure can be significantly reduced.
  • the fiber structure may be a single-layer or multi-layer fabric or knit. This may be a ceramic or a metallic fiber structure. Likewise, a fiber structure made of plastic can be used.
  • the liquid separator can have a store for separated liquid and an evaporator for evaporating the separated liquid.
  • the memory can be emptied again.
  • the fact is taken into account that a condensate formation in the radiator, especially when used as a low-pressure side exhaust gas recirculation cooler, only under certain environmental conditions or operating conditions, while in many other environmental conditions or operating conditions no condensation occurs.
  • operating conditions and environmental conditions prevailing in which even an evaporation of water is possible.
  • the memory can thus be collected for phases in which condensate accumulates, the separated condensate.
  • the evaporator With the help of the evaporator can then in phases, in which an evaporation of the condensate is possible, the memory to be emptied again. In this way, can be dispensed with an elaborate dissipation of the condensate in the environment.
  • the reservoir can optionally be equipped with an overflow to ensure the functionality of the liquid separator even when the storage tank is full.
  • the memory may be equipped with baffles or with a surge structure.
  • the dynamics of driving within the memory can accelerate the liquid, which can cause waves in the memory, which can cause the memory to spill over.
  • stored liquid could be returned to the gas flow via the discharge structure.
  • Swell structure counteracts the formation of waves, which also spilling over can be avoided.
  • the evaporator can be temperature-controlled depending on the temperature of the gas flow downstream of the radiator block. This ensures that the evaporation is actively operated only at temperatures in the gas stream above the evaporation temperature of the water.
  • the evaporator may be a type of wick.
  • the wick due to capillary forces, promotes the separated water from the reservoir to a wick end exposed to the gas flow. At sufficient gas temperature it comes at the wick end to the desired evaporation of the liquid. A detachment of droplets, however, is not expected due to the high capillary forces in the wick.
  • the evaporator may operate with a pump which supplies the liquid from the reservoir to an evaporation surface during an evaporation operation, that is, at a sufficient gas temperature.
  • a heater in the memory, with the help of which the liquid stored therein can be evaporated.
  • the heater may be electrically operated, for example. It is likewise possible to realize the heating device by means of at least one so-called heat pipe which, for example, couples a bottom of the accumulator to the radiator block in order to transfer heat from the radiator block to the bottom of the accumulator.
  • the evaporator for example, work with a suction jet pump, wherein the gas flow in a Venturi nozzle of the suction jet pump generates the negative pressure for sucking the liquid from the memory.
  • the evaporator may have corresponding valves in order to be able to actively control a supply of the liquid to the gas flow.
  • the evaporator may deliver the separated liquid to vaporize the fibrous structure which during the deposition phase serves to receive the liquid from the gas flow or liquid film from the cooler block.
  • the present invention also relates to an exhaust gas recirculation cooler and an exhaust gas recirculation system with such exhaust gas recirculation cooler.
  • the present invention also relates to an internal combustion engine with such an exhaust gas recirculation system.
  • the gas recirculation cooler in a low-pressure exhaust gas recirculation of a supercharged internal combustion engine for use.
  • Fig. 1 is a greatly simplified schematic diagram of a schematic
  • Fig. 3 is an axial view of the liquid separator according to a
  • Detail III in Fig. 2, 4 is an isometric view of a plate body of the liquid separator
  • FIG. 5 is a sectional view as in Fig. 2, but in another embodiment,
  • FIG. 6 is a sectional view as in Figures 2 and 5, but in a further embodiment,
  • Fig. 8 is an axial view of the liquid separator at another
  • FIG. 9 shows an axial section of the liquid separator from FIG. 8 according to FIG.
  • FIG. 10 is an enlarged cross-sectional view of the liquid separator of FIGS. 8 and 9, but with a deposition structure corresponding to section lines X in FIG. 9.
  • an internal combustion engine 1 includes an engine block 2 having a plurality of combustion chambers 3, a fresh air system 4 for supplying fresh air to the combustion chambers 3, an exhaust system 5 for discharging exhaust gas from the combustion chambers 3, and an exhaust gas recirculation system 6 for returning exhaust gas from the exhaust system 5 to the fresh air system 4.
  • the fresh air system 4 includes a fresh air filter 7, a compressor 8 of an exhaust gas turbocharger 9, a charge air cooler 10 and a throttle device 1 1, for example in the form of a throttle valve.
  • the intercooler 10 is connected to a cooling circuit 12.
  • the exhaust system 5 includes a turbine 13 of the exhaust gas turbocharger 9, which is connected via a drive shaft 14 to the compressor 8. Furthermore, the exhaust system 5 includes a catalyst 15 and a throttle device 16, for example in the form of a storage flap.
  • the exhaust gas recirculation system 6 includes an exhaust gas recirculation valve 17 and an exhaust gas recirculation cooler 18, which is connected to a cooling circuit 19.
  • a removal point 20 of the exhaust gas recirculation system 6 is arranged here downstream of the turbine 13 on the exhaust system 5.
  • An introduction point 21 of the exhaust gas recirculation system 6 is arranged upstream of the compressor 8 on the fresh air system 4. Accordingly, this is a low-pressure exhaust gas recirculation.
  • the cooling circuit 12 of the charge air cooler 10 and / or the cooling circuit 19 of the exhaust gas recirculation cooler 18 may be coupled to an engine cooling circuit 22. It can also be a separate cooling circuit.
  • the exhaust gas recirculation cooler 18, which is also referred to below generally as “cooler 18", according to the figures 1 to 6 comprises a cooler block 23 and a liquid separator 24 for separating liquid from a gas flow 25 which flows through the cooler block 23.
  • the liquid separator 24 is arranged on a gas side exit side 26 of the radiator block 23.
  • the radiator block 23 has a gas flow path 27 through which the gas flow can flow, which is indicated by arrows in FIGS. 2, 5, 6 and 7. Furthermore, the radiator block 23 includes a recognizable in Figure 1 coolant path 28, which is traversed by a preferably liquid coolant.
  • the coolant path 28 and the gas path 27 are thermal but media separated coupled together. Accordingly, the coolant path may remove heat from the gas path.
  • the gas path 27 in the radiator block 23 may contain a plurality of gas channels 29, which are bounded laterally by wall surfaces 30.
  • a liquid film 31 can form on these wall surfaces 30 under appropriate boundary conditions, namely by condensation of water vapor carried in the gas flow 25. This precipitate on the wall surfaces 30 then forms the liquid film 31, which emerges driven by the gas flow 25 from the gas channels 29.
  • the liquid separator 24 is connected directly to a gas outlet-side end face 32 of the radiator block 23, which coincides here with the outlet side 26 of the gas path 27.
  • the liquid separator 24 can discharge the liquid film 31.
  • the liquid separator 24 may have webs 33 which directly adjoin the gas outlet-side end face 32 of the radiator block 23.
  • the webs 33 lead the liquid film 31 emerging from the gas channels 29 to a collecting structure 34 of the liquid separator 24.
  • the accumulated liquid according to FIG. 3 can be deflected laterally along the webs 33 transversely to the gas flow direction 35 and then along the collecting structure 34, for example downwards be dissipated.
  • the liquid separator 24 may include a plate body 36 extending transversely to the gas flow direction 35.
  • the plate body 36 has a plurality of through openings 37, which in terms of number, arrangement and dimensioning complementary to gas side outlet openings 38 of the heat sink 23 are designed. Accordingly, the passage openings 37 are arranged with respect to the gas flow direction 35 axially aligned with the outlet openings 38.
  • the plate body 36 may have a hydrophilic fiber structure 39, which is indicated purely by way of example in Figure 4 on the right edge side of the plate body 36. It is clear that in principle the entire cooler block 23 facing the inner side 40 of the plate body 36 may be provided with such a fiber structure 39.
  • the fiber structure 39 is configured so that it can receive the liquid film 31.
  • FIG. 5 shows another embodiment of the liquid separator 24, in which discharge gaps 41 are formed, which extend transversely to the gas flow direction 35 and thereby directly adjoin the gas-side outlet ends 42 of the wall surfaces 30.
  • the respective liquid film 31 can enter from the respective wall surface 30 into the respective discharge gap 41, the respective liquid film 31, which enters such a discharge gap 41, being diverted in the discharge gap 41.
  • a gap width 43 is dimensioned so that capillary forces arise which suck the liquid film 31 into the discharge gap 41 and effect a discharge of the liquid in the discharge gap 41.
  • liquid can collect at the respective outlet end 42 of the wall surface 30 in an inlet region 44 of the respective discharge gap 41 liquid transported with the liquid film 31 until it is sucked into the discharge gap 41 by the capillary forces and discharged thereinto.
  • the liquid separator 24 may have a hydrophilic fiber structure 45, which may be arranged as in the example of Figure 5 within the respective discharge gap 41. It is also possible that the respective discharge gap 41 with its capillary action leads to such a fiber structure 45.
  • the liquid separator 24 in this embodiment also have a plate body 46 which extends transversely to the gas flow 25, which has through openings 47 aligned with the gas-side outlet openings 38 of the cooler block 23 and which has a web structure 48 protruding from the plate body 46.
  • the web structure 48 comprises a plurality of webs 49, each of which abuts directly on the gas outlet-side end face 32 of the radiator block 23. In this way, the Ableitspalte 41 on the one hand by the gas outlet side end face 32 and on the other hand by a cooler block 23 facing the inner side 50 of the plate body 46 is limited.
  • the liquid separator 24 can also be formed by means of a hydrophilic fiber structure 51, which extends completely over the outlet-side end face 32 of the radiator block 23.
  • the fibrous structure 51 can be traversed by the gas flow 25 and configured so that it can receive and discharge the liquid emerging from the gas path 27.
  • the fiber structure 51 is arranged at a distance from the exit-side end face 32 of the radiator block 23 in the gas flow direction 35. As a result, the entire surface of the fiber structure 51 is available for the flow and flow through the gas flow 25, whereby the flow resistance of the fiber structure 51 is reduced.
  • the fibrous structure 51 may be a ceramic or metallic knit or knit.
  • the fiber structure 51 may be single-layered or multi-layered.
  • FIGS. 6 and 7 a three-layer fiber structure 51 is indicated.
  • the liquid separator 24 is equipped with a reservoir 52 which can store the separated liquid. Accordingly, the respective liquid separator 24 may be configured to supply the separated liquid to this reservoir 52.
  • a memory 52 may be implemented in all embodiments shown here.
  • FIG. 7 shows an evaporator 53, with the aid of which the separated liquid can be evaporated from the accumulator 52. In operating phases in which condensate accumulates, this can be stored in the memory 52. In operating phases in which liquid can be evaporated, the memory 52 can be emptied again with the aid of the evaporator 53.
  • the accumulator 52 has an overflow 54, which can be controlled by a suitable valve 55.
  • a surge structure 56 is also arranged in the accumulator 52, for example in the form of a grid, which ensures that waves that may arise in the accumulator 52 during operation of a vehicle equipped with the internal combustion engine 1 do not cause the accumulators to overflow Can lead liquid.
  • the evaporator 53 is suitably temperature-controlled, depending on the temperature of the gas flow 25 downstream of the radiator block 23.
  • the evaporator 53 may have a wick, which promotes liquid according to Figure 7 to a gas flow 25 exposed area.
  • a heat pipe 57 to evaporate liquid from the accumulator 52.
  • the evaporator 53 may expediently be configured such that it feeds the separated liquid back to the fibrous structure 51 for evaporation. This can be done according to Figure 7 so that the evaporator 53 promotes the liquid into the region of the gas flow 25, such that there can detach droplets, which are collected and vaporized in the fiber structure 51.
  • a region is indicated in which the gas flow 25 contains water vapor.
  • the liquid separator 24 may have in a separate housing 58 a gas channel 59 which has a channel cross-section 60 through which the gas flow 25 can flow.
  • the channel cross section 60 is now largely, preferably completely, blocked by at least one deposition structure 61, 62, which can be traversed by the gas flow 25.
  • deposition structures 61, 62 are shown in FIG. 9, which are arranged one behind the other, ie in series in the flow direction of the gas flow 25, such that they are spaced apart in the flow direction of the gas flow 25.
  • a single deposition structure 61, 62 may suffice; Likewise, more than two deposition structures 61, 62 may be provided.
  • the respective deposition structure 61, 62 is permeable to the gas flow 25, but forms for entrained particles and in particular for entrained liquid droplets an obstacle to which the particles or droplets can accumulate, whereby they are eliminated from the gas flow 25.
  • the respective deposition structure 61, 62 is a fabric of a hydrophobic material, such as e.g. a metal fabric, in particular of steel, preferably of stainless steel.
  • the liquid separator 24 has in its housing 58 a collecting channel 63 which adjoins the channel cross-section 60 in the direction of gravity 64 indicated by an arrow.
  • the collection Channel 63 collects the separated from the respective deposition structure 61, 62 liquid and leads them to a drain line 65 to.
  • the drain line 65 can lead to the memory 52, which has been explained with reference to the embodiment of Fig. 7.
  • the collecting channel 63 extends transversely to the gas channel 59 and is open to the gas channel 59, that is opposite to the direction of gravity 64. Further, the collecting channel 63 is positioned so that a drip edge 66 of the respective Abscheide fabricat 61, 62 in the direction of gravity 64 adjacent thereto.
  • liquid absorbed by the respective deposition structure 61, 62 within the deposition structure 61, 62 can flow off in the direction of the drip edge 66 due to gravity and drip off from it into the collection channel 63. It is advantageous if the respective drip edge 66 is already arranged outside the channel cross-section 60 of the gas channel 59 through which the gas flow 25 flows and dips into the collecting channel 63. Then, the liquid from the gas flow 25 undisturbed drain into the collecting channel 63.
  • the collecting channel 63 is also designed here so that it tapers in the direction of gravity 64 to the discharge line 65 back.
  • a support 67 or 68 is respectively provided, on which the respective deposition structure 61, 62 is arranged or fixed.
  • the respective carrier 67, 68 extends transversely through the channel cross-section 60 and is formed, for example, by means of cross-shaped webs which generate only a small flow resistance.
  • the housing 58 has openings 69 with which the liquid separator 24 can be mounted on the radiator block 23, for example by means of a corresponding screw.
  • the housing 58 can have two housing halves 70 and 71, between which the respective carrier 67, 68 and / or the respective deposition structure 61, 62 can be clamped on the housing 58 for fixing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

La présente invention concerne un radiateur (18) destiné à refroidir un écoulement gazeux (25), en particulier dans un moteur à combustion interne (1), de préférence dans un véhicule automobile, comprenant un bloc de radiateur (23) qui comprend un circuit de gaz (27), qui peut être parcouru par l'écoulement gazeux (25), et un circuit de liquide de refroidissement (28), qui peut être parcouru par un liquide de refroidissement, lesdits circuits étant couplés thermiquement avec séparation des milieux. Le risque de condensation dans l'écoulement gazeux peut être réduit par un séparateur de liquide (24) destiné à séparer le liquide de l'écoulement gazeux (25) qui est disposé sur un côté sortie (26) du circuit de gaz (27) sur le bloc de radiateur (23).
EP14707782.0A 2013-03-08 2014-03-04 Radiateur Withdrawn EP2972047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013203963.8A DE102013203963A1 (de) 2013-03-08 2013-03-08 Kühler
PCT/EP2014/054136 WO2014135518A1 (fr) 2013-03-08 2014-03-04 Radiateur

Publications (1)

Publication Number Publication Date
EP2972047A1 true EP2972047A1 (fr) 2016-01-20

Family

ID=50193514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14707782.0A Withdrawn EP2972047A1 (fr) 2013-03-08 2014-03-04 Radiateur

Country Status (8)

Country Link
US (1) US9404447B2 (fr)
EP (1) EP2972047A1 (fr)
JP (1) JP6068686B2 (fr)
KR (1) KR101630139B1 (fr)
CN (1) CN105121991B (fr)
BR (1) BR112015019078A8 (fr)
DE (1) DE102013203963A1 (fr)
WO (1) WO2014135518A1 (fr)

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Also Published As

Publication number Publication date
KR20150123941A (ko) 2015-11-04
WO2014135518A1 (fr) 2014-09-12
DE102013203963A1 (de) 2014-09-11
CN105121991B (zh) 2016-09-14
US20160010596A1 (en) 2016-01-14
KR101630139B1 (ko) 2016-06-13
BR112015019078A2 (pt) 2017-07-18
US9404447B2 (en) 2016-08-02
BR112015019078A8 (pt) 2019-11-12
CN105121991A (zh) 2015-12-02
JP2016510868A (ja) 2016-04-11
JP6068686B2 (ja) 2017-01-25

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