CN101454559B - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
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- CN101454559B CN101454559B CN2007800197639A CN200780019763A CN101454559B CN 101454559 B CN101454559 B CN 101454559B CN 2007800197639 A CN2007800197639 A CN 2007800197639A CN 200780019763 A CN200780019763 A CN 200780019763A CN 101454559 B CN101454559 B CN 101454559B
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- heat exchanger
- tube
- exchanger tube
- exchanger according
- heat
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- 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
- F28D1/0535—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 the conduits having a non-circular cross-section
- F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
- F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
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- 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
- F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
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- 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
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
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- 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
- F02M26/31—Air-cooled heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/02—Tubular elements of cross-section which is non-circular
- F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
- F28F1/045—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular with assemblies of stacked elements
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- 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
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- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
- F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a heat exchanger, in particular for a motor vehicle, comprising at least one exchanger pipe (4) for conducting a gaseous fluid. Said fluid contains or can contain the exhaust gas of an internal combustion engine as an admixture and a coolant can flow around the exchanger pipe (4) in order to cool the fluid stream. The exchanger pipe (4) is formed as an extruded section from an aluminium-based alloy.
Description
Technical field
The present invention relates to a kind of heat exchanger, be specially adapted to automobile.
Background technology
At present, developed the heat exchanger that the air-flow in the waste gas recirculation is cooled off, said air-flow comprises part engine exhaust gas (also can be mixed with pressurized air) at least.In order to reduce discharge of poisonous waste, cooled waste gas turns back to the internal combustion engine from inlet side once more.This fluid to be cooled not only temperature is high, and acid strong.Look the ruuning situation difference, pH value can occur and be the deposition of 1 to 3 condensate liquid, this just has very high requirement to the high-temperature corrosion-resistance property of heat exchanger.Therefore this heat exchanger is generally by stainless steel or similar material manufacturing.
Summary of the invention
The objective of the invention is to, a kind of heat exchanger that is used to cool off the gas that contains part waste gas at least is provided, it has light-duty structure and low cost of manufacture.
A kind of heat exchanger that preamble is carried has been realized this purpose, and this heat exchanger is used for automobile, comprises at least one heat exchanger tube; Be used to guide gaseous fluid; Wherein fluid contains the I. C. engine exhaust mixture at least, and wherein heat exchanger tube is characterized in that through condensing agent circulation cooling blast; Heat exchanger tube is aluminium alloy extruded profiled member, and the exchange heat pipe does not carry out completely, surpasses the heat treatment of temperature of processing when making the heat exchanger tube process.Through adopting aluminium alloy extruded profiled member to make heat exchanger tube, can produce lightweight construction heat exchanger cheaply, it has high compression strength and good heat exchange property under intended size.Test that accident shows, under general condition aluminium alloy extruded profiled member is to the corrosion resistance of waste gas, the imagination before obviously being better than.
In a preferred embodiment, heat exchanger tube has a plurality of independently pipelines.This makes when heat exchanger has high surface area that heat exchanger tube has favorable mechanical stability, and owing to adopt extrudate, the manufacturing cost of this heat exchanger tube with respect to the traditional heat exchanger tube that has only a passage, does not improve a lot.
Another preferred embodiment of heat exchanger is characterised in that passage separates through partition, and it is the part of extrusion modling part.Partition is preferably in to push when the extrusion modling part is made and generates.
Another preferred embodiment of heat exchanger is characterised in that the partition in the pipe of extrusion modling part at least interrupts.All or some partitions can be continuously.As optional scheme, all or some partitions also can interrupt.According to one embodiment of present invention, partition alternately for interrupt with continuous.
Another preferred embodiment of heat exchanger is characterised in that the outer wall thickness of heat exchanger tube is preferably 0.4～2mm.The wall thickness of outside pipe is called as the outer wall thickness of heat exchanger tube.
Another preferred embodiment of heat exchanger is characterised in that heat exchanger tube has the partition that thickness is less than or equal to the outer wall thickness of heat exchanger tube.According to the present invention, it is very favorable that this zone is proved to be.
Another preferred embodiment of heat exchanger is characterised in that independently passage is through being inserted into the also floor of brazing filler metal formation in the heat exchanger tube.Can form all passages of heat exchanger tube through the floor that inserts.But, in the heat exchanger tube that has through the for example autonomous channel of extrusion process moulding, also can form other independently passage.
The general preferred air of cooling medium.Particularly advantageous is that this heat exchanger is as second cooling class after the first order exhaust-heat exchanger of liquid cooling.Also can be the heat exchanger of liquid cooling in principle according to heat exchanger of the present invention, wherein the high corrosion resistance of aluminium extrusion profiled member is favourable.Importantly, fluid temperature (F.T.) is no more than aluminium extrusion profiled member institute applicable scope.
The present invention is not only applicable to cool off pure waste gas, can be used for cooling off the mist of pure pressurized air or waste gas and pressurized air yet.
The general preferred construction form of heat exchanger comprises tube sheet, and wherein the end of heat exchanger tube is inserted in the tube sheet, and is fixedly connected with tube sheet.The version of Here it is in principle well-known tube bundle heat exchanger.And heat exchanger tube can be fixedly connected with tube sheet through induction brazing, hot weld, laser weld or melting welding.Here importantly, heat exchanger tube extrusion modling part only externally and as few as possible passes through heating with only being connected of tube sheet in the part and according to possibility.Someone infers that the fabulous corrosion resistance of heat exchanger tube extrusion modling part is that this structure especially forms owing to its exquisite especially crystal structure in aluminium alloy extruded process.After heat exchanger tube extrusion modling part is heated, possibly cause the material grains alligatoring, thereby reduce corrosion resistance.
If can allow to reduce slightly corrosion resistance, so then can heat-treat whole cooler.Though the bulk heat treatmet meeting of cooler core body is caused the grainiess alligatoring of aluminum, extruded tube is because impurities of materials is few, and surfacing still has good corrosion resistance.In the bulk heat treatmet process, floor is in the same place by brazing filler metal with pipe, and pipe also is in the same place by brazing filler metal with tube sheet.Brazing filler metal can be adopted vacuum brazing method or promise section Roc method for brazing (Nocolok-Verfahren).Under the situation of this whole brazing filler metal, also can consider, not only at pipe outer setting floor, also can be at pipe set inside floor.Then, these floors (for example partition floor or vortex generator) inner and heat exchanger tube brazing filler metal at heat exchanger tube.These floors also can have other anti-corrosion protection.
According to foregoing intention, as the scheme that substitutes or replenish, heat exchanger tube also can be fixedly connected with tube sheet through adhesive.This fixed form does not need the local heat heat exchanger tube in assembling process.Another kind of is exactly through fixing with the relevant mechanical means of sealing as the fixed form that substitutes or replenish, need not heat.
According to foregoing intention, in general advantageously, in the heat exchanger assembling process, the exchange heat pipe has not carried out completely, has surpassed the heat treatment of temperature of processing when making the heat exchanger tube process.If when the temperature when through welding or soldering heat exchanger tube being fixed on tube sheet will reach this temperature, must this temperature be limited in the subrange.
In a preferred embodiment, have a floor element and heat exchanger tube thermo-contact at least.This can improve hot heat exchange efficiency, particularly air-cooled heat exchanger.Here preferably through bonding way connection rib panel element and heat exchanger tube.Avoided in this way being heated once more after the extrusion process heat exchanger tube process, it possibly reduce the corrosion resistance of heat exchanger tube.This bonding preferred use is wherein mixed metal dust especially based on the adhesive of epoxy resin in adhesive.Metal dust can be aluminium powder or other suitable metal dust.This adhesive is well-known, except that having high strength, also has high-fire resistance.Particularly advantageously be that bonding adhesive has at least 180 ℃, best at least 200 ℃ hear resistance.
As substituting or replenish, the floor element can with the heat exchanger tube elastic compression.In principle, can be during elastic compression without adhesive.Yet adopt elastic compression to add that adhesive is a kind of easy heat exchanger fit.
As substituting or replenishing, can use heat-conducting cream between heat exchanger tube and the floor element in addition.This cream can have the hear resistance higher than known binders, makes it be fit to use with elastic compression.Structure according to heat exchanger is different, can some heat exchanger tubes are bonding, and other heat exchanger tube elastic compressions also can use heat-conducting cream where necessary.
Another preferred embodiment of heat exchanger is characterised in that the floor element is in the outside and heat exchanger tube brazing filler metal.Realized having the sealed connection of material of good heat conductive performance through brazing filler metal.
Another preferred embodiment of heat exchanger is characterised in that the brazing filler metal in the brazing filler metal stove adopts vacuum brazing method or promise section Roc method for brazing to carry out.In the present invention, this method is specially adapted to the brazing filler metal of floor element and heat exchanger tube.
In a preferred form of implementation, the floor element forms by being arranged in two waveform parts between adjacent heat exchange tubes.This is a kind of mode of simple raising heat exchange efficiency, and wherein, the waveform plate is easy to flexible fastening or bonding especially.
As substituting or replenish, the floor element can be by basic vertical with heat exchanger tube and formed by the plate that is passed by heat exchanger tube.Like this, just can increase the surface area of heat exchanger through simple mode.
In general preferred form of implementation, heat exchanger has at least one casing, is used for importing or derive fluid at least one heat exchanger tube.Particularly preferably, casing adopts aluminum alloy materials basically.But in the lower exit of temperature, casing also can adopt plastic material, like polyamide.In principle, can adopt the form of implementation of all known Thermal Exchanger, as long as they need satisfy the corrosion resistance and the hear resistance requirement of exhaust-heat exchanger.
In preferred more detailed form of implementation, be provided with bypass, wherein, through a regulating element optionally with direct fluid bypass or at least one heat exchanger tube that leads.This bypass of avoiding the waste gas cooling often is needs, to adapt to the different operation conditions of internal combustion engine.
In improved embodiment, heat exchanger can have at least one and be used to import the heat exchanger tube that be used to reflux in parallel basically with, and it connects mutually in the baffling district.Like this, heat exchanger is exactly the heat exchanger of U type streaming, and it can cool off waste gas under intended size rapidly.
Generally preferably, the maximum operating temperature that transfers to the fluid of heat exchanger is lower than 300 ℃, is preferably lower than 250 ℃.Heat exchanger preferably uses adhesive bonding.Particularly advantageous is according to the second level of heat exchanger of the present invention as the waste gas cooling, and preferably to be arranged in after first gaseous effluent of liquid cooling.In principle, can be arranged in the high pressure exhaust gas recirculating system, also can be arranged in the low pressure egr system according to heat exchanger of the present invention.
Look the difference of embodiment, can import the mist of pure pressurized air, pure waste gas or pressurized air and waste gas according to heat exchanger of the present invention.
The present invention also comprises the application as heat exchanger tube of aluminium extrusion profiled member on heat exchanger.
For fear of the obstruction that causes owing to dirt, these profiled members can have continuous partition, perhaps can have the partition of interruption.Under hydraulic diameter was not too small situation, cooler froze in the time of can avoiding low temperature.Hydraulic diameter is preferably between 1.5 to 4 millimeters.
Do not contain at gas under the situation of carbon black, the distance between partition can contain at gas under the situation of carbon black less than 1～3mm, and distance is more preferably greater than 1～3mm between partition.The thickness of pipe, promptly short length of pipe is 4～10mm in the ideal case, and Guan Kuanwei 8～100mm.
The key character of the pipe of extrusion modling is the thickness that the thickness of outer wall is adopted greater than normal cooler down.For guaranteeing enough corrosion resistancies, must strengthen thickness.This thickness is preferably 0.4～2mm, is 0.7～1.2mm under the ideal state.Thickness also is referred to as wall thickness.In addition, partition thickness preferably is less than or equal to wall thickness.So just can make system on burn into cost, the pressure loss and thermodynamics, reach optimum.
The thickness of extrusion modling part corner areas can strengthen, and for example becomes big through the radius that makes two outmost chambers.In addition, the pipe of extrusion modling also can " skeleton form " be established reinforcement on the corner.This reinforcement has tangible advantage, because it can improve intensity when pressure oscillation and temperature fluctuation occurring.
Other advantages and characteristic are provided by embodiment that describes below and related request.
Description of drawings
Below will describe 6 preferably according to heat exchanger embodiment of the present invention, and according to shown in drawing specify.Wherein:
Fig. 1 has shown the vertical view of first embodiment of the invention;
Fig. 2 has shown the sectional view of second embodiment of the invention;
Fig. 3 has shown the sectional view of the 3rd embodiment of the invention;
Fig. 4 has shown the sectional view and the side view of the 4th embodiment of the invention;
Fig. 5 has shown the side view of the 5th embodiment of the invention;
Fig. 6 has shown the vertical view of the 6th embodiment of the invention;
Fig. 7 to 10 has shown according to other embodiment bands heat exchanger sectional view of passage independently.
The specific embodiment
Be a kind of air-cooled heat exchanger according to heat exchanger of the present invention shown in Fig. 1, be used to cool off the cooling of Diesel engine EGR gas.This heat exchanger is arranged in first order liquid cooling heat exchanger that figure does not show, known as the second level in waste gas stream after.
This heat exchanger comprises the interface 1 of inlet side, and it is linked in the current divider box 2 that comprises tube sheet 3.
Some heat exchanger tubes 4 are linked in the tube sheet 3, and are fixedly connected hermetically with it.Heat exchanger tube 4, tube sheet 3 and casing 2 all adopt aluminum alloy materials.
In the embodiment shown, the consideration from view has only shown 4 heat exchanger tubes.In practical application, usually more heat exchanger tube can be set.
Heat exchanger tube and/or extrusion modling part 4 generally do not carry out special corrosion protection after extrusion modling.
But also can consider in principle extrudate spare is carried out corrosion protection.
Parallel heat exchanger tube 4 is linked in the manifold 5 of outlet side along exhaust gas direction, and it comprises tube sheet 6, and basic identical with the casing 2 of inlet side.
Between extrudate spare 4, arranging floor element 7 respectively.This row's heat exchanger tube 4 links to each other with the side members 8 of defencive function with having to hide respectively in the end.On the other hand, the floor 7 in the end links to each other with a heat exchanger tube 4 that is positioned at the outside.
At inlet side, the temperature through pre-cooled waste gas is lower than 250 ℃.Can guarantee that through the circulation of cooling air floor element 7 can not destroyed by high temperature with bonding 9 of heat exchanger tube 4 around heat exchanger tube 4 and floor element 7.
At the transition position of heat exchanger tube 4 entering tube sheet elements 3, heat exchanger tube 4 is fixed through the brazing filler metal of part, for example hot weld, induction welding or the like.Importantly, heat exchanger tube 4 no longer stands to heat completely after extrusion process, thus the temperature can not meet or exceed extrusion process the time.To guarantee that like this microcrystalline texture of the heat exchanger tube 4 that forms through extrusion process is maintained.According to existing knowledge, the good corrosion of this some exchange heat pipe 4 is very important.When heat exchanger tube 4 preferably carries out local brazing filler metal on tube sheet 3,6, should make heat exchanger tube at least towards the crystal structure on the surface of waste gas and corrosion resistance Yin Gaowen and occur changing not.
Second embodiment that describes according to Fig. 2 shown the sectional view of heat exchanger tube 4, and its cross section with first embodiment is identical.As can be seen from the figure, the heat exchanger tube 4 of each extrusion modling has 4 independently passage 4a respectively, and wherein, inner partition 10 independently passage 4a is spaced from each other.Except the heat conductivility that improves heat exchanger tube 4, partition 10 has also improved mechanical stability and compression strength, even adopting under the relatively thin situation of softer aluminium alloy and wall thickness.
Be the structure of floor element 7 ' with the difference of the embodiment of Fig. 1.Floor element 7 ' here is a plate, and it is perpendicular to heat exchanger tube 4, and has the gillis 11 that surface area is increased.Floor element 7 ' can merely be fixed between the heat exchanger tube 4 through mechanical system, for example passes through elastic force.As substituting or replenishing, floor element 7 can be bonded on the heat exchanger tube 4.Also can use heat-conducting cream at floor element 7 ' and 4 of heat exchanger tubes.
The 3rd embodiment as shown in Figure 3 changes with respect to embodiment as shown in Figure 2 to some extent, and wherein, each bight of heat exchanger tube 4 is provided with side partition 12, thereby floor element 7 ' shape is fixed between the heat exchanger tube 4 sealedly.Particularly according among the embodiment shown in Figure 3, floor element 7 ' can be realized fixing through special mode through elastic compression reliably.The element that does not show among the figure has guaranteed between the stacked each other floor element of heat exchanger tube direction, keeping definite spacing.
In the 4th embodiment as shown in Figure 4, floor element 7 " to form by the plate that on whole heat exchanger width, extends respectively, they have the gillis 11 that surface area is increased.Shown in this side view, floor element 7 " through suitable mode space, formed floor element 7 " pile up.Each floor element 7 " be included in punching quantitatively identical, that aim at each other with heat exchanger tube 4 quantity.In installation process, heat exchanger tube 4 passes floor element 7 " punching of piling up or aiming at each other formed.In above embodiment, the cross section of heat exchanger tube 4 and affiliated punching is oval basically.Each heat exchanger tube has 8 independently passage 4a.
In this embodiment, " and the mechanical fixation between the heat exchanger tube 4 and thermo-contact can be after the pre-assembled of heat exchanger, exchanges heat pipe 4 with simple mode and carries out hole enlargement and realize for floor element 7.Hole enlargement can realize through suitable hole enlargement head, through filling up water it is frozen, and realizes through pressurization or other similar mode.As substituting or replenishing, can be at floor element 7 " and use heat-conducting cream of the contact position between the heat exchanger tube 4 and/or adhesive.
Similar according to embodiment shown in Figure 5 and first embodiment shown in Figure 1, wherein, be provided with crossbeam 13, make that the heat exchanger tube 4 between the side members 8 that is in the end receives mechanical grip with floor element 7.Adopt this clamping mode, just can abandon floor element 7 is bonded on the heat exchanger tube 4.But under the bonding situation of floor element 7 and heat exchanger tube 4, can improve the mechanical stability of heat exchanger on the whole according to clamping shown in Figure 5.
In embodiment shown in Figure 6, the heat exchanger tube 4 of heat exchanger is identical with first embodiment with floor element 7.Distinguish the casing that is heat exchanger with first embodiment.First casing 14 not only has the adapter 15 of inlet side, also has the adapter 16 of outlet side.Seal with heat exchanger tube 4 relative casings 17, its effect just interconnects heat exchanger tube 4.Regulating element 18 in first casing 14 is looked its position difference and entrance sleeve 15 and discharge connection 16 (dotted line) are directly linked to each other maybe will be taken over 15,16 and be spaced from each other.Under first kind of situation, casing 14 forms the bypass channel that gets around heat exchanger tube 4.Under second kind of situation (regulating element 18 is a solid line), heat exchanger is according to the principle work of U type flow heat exchanger.Waste gas gets into first and takes over, and flows through according to two heat exchanger tubes 4 in bottom shown in Figure 6, and baffling in second casing 17 flows through two heat exchanger tubes 4 in top in opposite direction then, flows out from discharge connection 16 then.
Fig. 7 to 10 has shown the cross section according to the heat exchanger tube of other embodiment.Shown heat exchanger tube 4 is formed by the extrusion modling part of the square-section with sealing 40.40 the inside in the square-section, one is divided into some passage 4a or chamber for the cavity 41 of rectangle on the whole basically.Some passage 4a are separated from each other through partition 43,44.
In the embodiment shown in fig. 7, the cavity in the square-section 40 41 is divided into 8 passages or chamber 4a by 7 continuous partitions 43,44 altogether.Partition 43,44 is parallel with the minor face of square-section 40 and vertical with long limit.The square-section is designated rd extending on short side direction among Fig. 7.Extend rd and also be called as thickness.Square-section 40 is designated rb extending on long side direction among Fig. 7.It is wide that extension rb also can be called as pipe.The outer wall thickness of square-section 40 is designated d in Fig. 7, also can be described as wall thickness.The thickness of partition 43,44 is designated s in Fig. 7, also can be described as partition thickness s.
Unnecessary freezing appears under low temperature condition for fear of cooler, the hydraulic diameter of passage 4a, and promptly inside diameter should be too not little.The hydraulic diameter of passage 4a is preferably between 1.5～4mm.
As shown in Figure 8, square-section 40 also can have the partition 48 of interruption.Partition 48 comprises two partition sections 49,50, their inwardly vertical extensions in 40 long limit from the square-section respectively, but do not contact.Partition 48 use of interrupting are, avoid the obstruction that is occurred by not hoping of causing of carbon black.Embodiment shown in Fig. 8 is used alternatingly the partition 48 and continuous partition 43,44 of interruption.
In the embodiment shown in fig. 9, the extrusion modling part is thickeied at edge especially.This can realize through making the passage 54,55 that is arranged in edge be ellipticity.Make the radius of passage 54,55 or chamber in the outside greater than the passage among Fig. 7 and the embodiment shown in Figure 8 like this.
Among the embodiment shown in Figure 10, the passage in the outside or chamber 64,65 have two reinforcements 66,67,68,69 respectively, and they extend in the corner of affiliated chamber 64,65 with the form of skeleton.Reinforcement 66 to 68 has improved intensity when pressure oscillation and temperature fluctuation particularly occurring.
Claims (33)
1. heat exchanger is used for automobile, comprises at least one heat exchanger tube (4); Be used to guide gaseous fluid; Wherein fluid contains the I. C. engine exhaust mixture at least, and wherein heat exchanger tube (4) is characterized in that through condensing agent circulation cooling blast; Heat exchanger tube (4) is aluminium alloy extruded profiled member, and exchange heat pipe (4) does not carry out completely, surpasses the heat treatment of temperature of processing when making the heat exchanger tube process.
2. heat exchanger according to claim 1 is characterized in that, heat exchanger tube (4) has a plurality of independently passages (4a).
3. heat exchanger according to claim 2 is characterized in that, independently passage (4a) is separated from each other through partition (43,44,49), and it is the part of extrusion modling part.
4. heat exchanger according to claim 3 is characterized in that, part is discontinuous at least for the partition in the extruded tube (49).
5. according to claim 3 or 4 described heat exchangers, it is characterized in that heat exchanger tube (4) outer wall thickness is 0.4～2mm.
6. heat exchanger according to claim 5 is characterized in that, heat exchanger tube (4) partition (43,44,49) thickness is less than or equal to heat exchanger tube (4) outer wall thickness.
7. heat exchanger according to claim 2 is characterized in that, independently passage (4a) forms through inserting and weld the floor structure in the heat exchanger tube (4).
8. heat exchanger according to claim 1 is characterized in that, condensing agent is an air.
9. heat exchanger according to claim 1 is characterized in that, heat exchanger has tube sheet (3,6), and wherein tube sheet (3,6) is passed through at heat exchanger tube (4) terminal, and is fixedly connected with tube sheet (3,6).
10. heat exchanger according to claim 9 is characterized in that, heat exchanger tube (4) is fixedly connected with tube sheet (3,6) through hot weld.
11. heat exchanger according to claim 10 is characterized in that, heat exchanger tube (4) is fixedly connected with tube sheet (3,6) through induction brazing, laser weld or melting welding.
12. heat exchanger according to claim 9 is characterized in that, heat exchanger tube (4) is fixedly connected with tube sheet through bonding.
13. heat exchanger according to claim 1 is characterized in that, (7,7 ', 7 ") has thermo-contact with heat exchanger tube (4) to have a floor element at least.
14. heat exchanger according to claim 13 is characterized in that, (7,7 ', 7 ") is bonding with heat exchanger tube (4) for the floor element.
15. heat exchanger according to claim 14 is characterized in that, bonding through being the adhesive realization of base with epoxy resin, wherein adhesive mixes metal dust.
16., it is characterized in that the adhesive of bonding usefulness has at least 180 ℃ hear resistance according to claim 14 or 15 described heat exchangers.
17. heat exchanger according to claim 16 is characterized in that, the adhesive of bonding usefulness has at least 200 ℃ hear resistance.
18. heat exchanger according to claim 13 is characterized in that, (7,7 ', 7 ") is connected with the heat exchanger tube elastic compression floor element.
19. heat exchanger according to claim 13 is characterized in that, (is provided with heat-conducting cream between 7,7 ', 7 ") at heat exchanger tube (4) and floor element.
20. heat exchanger according to claim 13 is characterized in that, floor element (7,7 ', 7 ") outside and heat exchanger tube (4) welding.
21. heat exchanger according to claim 13 is characterized in that, floor element (7) is made up of the waveform plate between adjacent interchange channel.
22. heat exchanger according to claim 13 is characterized in that, (7 ', 7 ") is by constituting perpendicular to heat exchanger tube (4) and by the plate that is passed by heat exchanger tube (4) for the floor element.
23. heat exchanger according to claim 1 is characterized in that, heat exchanger has a casing (2,5), is used to make the fluid inflow or flows out at least one heat exchanger tube (4).
24. heat exchanger according to claim 23 is characterized in that, casing (2,5) adopts aluminum alloy materials.
25. heat exchanger according to claim 23 is characterized in that, casing (2,5) adopts plastic material.
26. heat exchanger according to claim 23 is characterized in that, casing (2,5) adopts polyamide.
27. heat exchanger according to claim 1 is characterized in that, heat exchanger has bypass (14), and wherein fluid optionally flows through bypass (14) or at least one heat exchanger tube (4) through regulating element (18).
28. heat exchanger according to claim 1 is characterized in that, heat exchanger has a heat exchanger tube that is used to import (4) and the heat exchanger tube that is used to reflux (4) that at least one is substantially parallel with it at least, and they interconnect in baffling district (17).
29. heat exchanger according to claim 1 is characterized in that, the maximum operating temperature of fluid is less than 300 ℃ in the heat exchanger.
30. heat exchanger according to claim 1 is characterized in that, the maximum operating temperature of fluid is less than 250 ℃ in the heat exchanger.
31. heat exchanger according to claim 1 is characterized in that, pure pressurized air passes heat exchanger.
32. heat exchanger according to claim 1 is characterized in that, pure waste gas passes heat exchanger.
33. heat exchanger according to claim 1 is characterized in that, the mist of pressurized air and waste gas passes heat exchanger.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006026037.6 | 2006-06-01 | ||
| DE102006026037 | 2006-06-01 | ||
| PCT/EP2007/004869 WO2007137863A1 (en) | 2006-06-01 | 2007-06-01 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101454559A CN101454559A (en) | 2009-06-10 |
| CN101454559B true CN101454559B (en) | 2012-07-18 |
Family
ID=38480567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800197639A Expired - Fee Related CN101454559B (en) | 2006-06-01 | 2007-06-01 | Heat exchanger |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2029883A1 (en) |
| CN (1) | CN101454559B (en) |
| WO (1) | WO2007137863A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8113269B2 (en) | 2007-02-22 | 2012-02-14 | Thomas & Betts International, Inc. | Multi-channel heat exchanger |
| DE102008031158A1 (en) * | 2008-07-03 | 2010-01-07 | Behr Gmbh & Co. Kg | Extruded tube for e.g. intercooler in motor vehicle, has two parallel outside side walls comprising embossings that serve to form bulged portions that project into two ducts, where continuous web extends between side walls |
| ES2385952B1 (en) * | 2009-04-22 | 2013-06-17 | Valeo Termico, S.A. | HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE. |
| US9404691B2 (en) * | 2013-07-24 | 2016-08-02 | Cale Patrick Collins Kaupp | Condensing heat recovery unit for a portable fluid heater |
| DE102014213088A1 (en) * | 2014-07-04 | 2016-01-07 | Mahle International Gmbh | flat tube |
| CN207600251U (en) * | 2015-06-12 | 2018-07-10 | 谢彦君 | Heat exchanger |
| CN106323043A (en) * | 2016-09-30 | 2017-01-11 | 如东双洋机械设备有限公司 | Compressed air precooler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323851A (en) * | 1993-04-21 | 1994-06-28 | Wynn's Climate Systems, Inc. | Parallel flow condenser with perforated webs |
| WO2005038376A1 (en) * | 2003-10-17 | 2005-04-28 | Behr Gmbh & Co. Kg | Heat exchanger, in particular for motor vehicles |
| WO2006035986A1 (en) * | 2004-09-28 | 2006-04-06 | T.Rad Co., Ltd. | Egr cooler |
| CN1771420A (en) * | 2003-04-11 | 2006-05-10 | 达纳加拿大公司 | Heat exchanger with flow circuiting end caps |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3113100B2 (en) * | 1992-11-05 | 2000-11-27 | 株式会社デンソー | Multi-hole tube extrusion die and multi-hole tube |
| JPH1047879A (en) * | 1996-07-26 | 1998-02-20 | Mitsubishi Materials Corp | Heat exchanger |
| US6397939B1 (en) * | 2000-12-13 | 2002-06-04 | Modine Manufacturing Company | Tube for use in serpentine fin heat exchangers |
| KR100906769B1 (en) * | 2002-01-31 | 2009-07-10 | 한라공조주식회사 | Heat exchanger tube with tumbling toy-shaped passages and heat exchanger using the same |
| US6793012B2 (en) * | 2002-05-07 | 2004-09-21 | Valeo, Inc | Heat exchanger |
-
2007
- 2007-06-01 CN CN2007800197639A patent/CN101454559B/en not_active Expired - Fee Related
- 2007-06-01 EP EP07725749A patent/EP2029883A1/en not_active Withdrawn
- 2007-06-01 WO PCT/EP2007/004869 patent/WO2007137863A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5323851A (en) * | 1993-04-21 | 1994-06-28 | Wynn's Climate Systems, Inc. | Parallel flow condenser with perforated webs |
| CN1771420A (en) * | 2003-04-11 | 2006-05-10 | 达纳加拿大公司 | Heat exchanger with flow circuiting end caps |
| WO2005038376A1 (en) * | 2003-10-17 | 2005-04-28 | Behr Gmbh & Co. Kg | Heat exchanger, in particular for motor vehicles |
| WO2006035986A1 (en) * | 2004-09-28 | 2006-04-06 | T.Rad Co., Ltd. | Egr cooler |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2029883A1 (en) | 2009-03-04 |
| WO2007137863A1 (en) | 2007-12-06 |
| CN101454559A (en) | 2009-06-10 |
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