DE102005043294A1 - Charge-air cooler for motor vehicle has inner ribs in the flow channels with longitudinal extension shorter than length - Google Patents
Charge-air cooler for motor vehicle has inner ribs in the flow channels with longitudinal extension shorter than length Download PDFInfo
- Publication number
- DE102005043294A1 DE102005043294A1 DE102005043294A DE102005043294A DE102005043294A1 DE 102005043294 A1 DE102005043294 A1 DE 102005043294A1 DE 102005043294 A DE102005043294 A DE 102005043294A DE 102005043294 A DE102005043294 A DE 102005043294A DE 102005043294 A1 DE102005043294 A1 DE 102005043294A1
- Authority
- DE
- Germany
- Prior art keywords
- charge air
- coolant
- flow
- flow channels
- length
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
- F02B29/0462—Liquid cooled heat exchangers
-
- 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
- F28D7/1684—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 the conduits having a non-circular cross-section
-
- 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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
- F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/14—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by endowing the walls of conduits with zones of different degrees of conduction of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
-
- 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
Abstract
Description
Die Erfindung betrifft einen Ladeluftkühler, insbesondere für Kraftfahrzeuge nach dem Oberbegriff des Patentanspruches 1 – bekannt durch die DE-A 199 27 607 der Anmelderin.The The invention relates to a charge air cooler, in particular for motor vehicles according to the preamble of claim 1 - known from DE-A 199 27 607 of the Applicant.
Bei dem durch die DE-A 199 27 607 bekannt gewordenen Ladeluftkühler wird die Ladeluft durch ein flüssiges Kühlmittel gekühlt, wobei die Ladeluft einen Stapel von Flachrohren durchströmt, das Kühlmittel in einem Gehäusemantel geführt ist und die Flachrohre auf deren Außenseite umströmt. Innerhalb der Flachrohre sind zur Erhöhung des ladeluftseitigen Wärmeüberganges Wellprofile, so genannte Innenrippen angeordnet. Ladeluft und Kühlmittel sind im Wesentlichen im Gegenstrom geführt, lediglich in den Ein- und Austrittsbereichen der Flachrohre erfolgt eine Querströmung des Kühlmittels, bedingt durch die seitlich am Gehäuse angeordneten Kühlmittelstutzen. Infolge dieser Strömungsausbildung trifft die erhitzte Ladeluft beim Eintritt in die Flachrohre auf ein bereits erwärmtes Kühlmittel, so dass sich aufgrund der relativ geringen Temperaturdifferenz im Eintrittsbereich der Ladeluft eine starke Erhitzung des flüssigen Kühlmittels ergeben kann, die teilweise auch zum lokalen Sieden des Kühlmittels führt, was in jedem Fall zu vermeiden ist.at the known from DE-A 199 27 607 intercooler is the charge air through a liquid coolant cooled, wherein the charge air flows through a stack of flat tubes, the coolant in a housing jacket guided is and flows around the flat tubes on the outside. Within the flat tubes are to increase the charge air side heat transfer Corrugated profiles, so-called inner ribs arranged. Charge air and coolant are essentially conducted in countercurrent, only in the And exit areas of the flat tubes is a cross flow of the Coolant, due to the side of the housing arranged coolant pipe. As a result of this flow training hits the heated charge air when entering the flat tubes on an already heated Coolant, so that due to the relatively low temperature difference in the inlet area the charge air can give rise to a strong heating of the liquid coolant, the partially leads to local boiling of the coolant, which in any case to avoid is.
Zur Lösung dieses Problems wurde in der DE-A 39 06 747 der Anmelderin für einen gattungsfremden Ladeluftkühler vorgeschlagen, im Eintrittsbereich der Ladeluft Wellrippen mit einer geringeren Rippendichte anzuordnen als in dem stromabwärtigen Bereich der Ladeluftströmung. Damit wird der Wärmeübergang im Eintrittsbereich der Ladeluft verschlechtert und demzufolge weniger Wärme auf das durch Rohre strömende Kühlmittel übertragen. Nachteilig bei dieser Lösung ist, dass zwei verschiedene Arten von Wellrippen, näm lich mit hoher und geringer Rippendichte beim Aufbau des bekannten Rippenrohrblockes montiert und gelötet werden müssen.to solution This problem has been described in DE-A 39 06 747 of the applicant for a generic intercooler proposed in the inlet region of the charge air corrugated fins with a to arrange lower rib density than in the downstream area the charge air flow. This is the heat transfer deteriorates in the inlet region of the charge air and therefore less Heat up flowing through pipes Transfer coolant. A disadvantage of this solution is that two different types of corrugated fins, namely with high and low rib density in the construction of the known finned tube block assembled and soldered Need to become.
In der DE-A 23 42 787 ist eine weitere Lösung dieses Problems für einen Ladeluftkühler beschrieben, welcher aus Rippenrohren aufgebaut ist, welche von Kühlmittel durchströmt werden, welches über kreisringförmige Rippen am Außenumfang der Rohre die zwischen den Rohren strömende Ladeluft kühlt. Um eine Überhitzung des Kühlwassers in den Rohren zu vermeiden, ist unter anderem vorgesehen, die ersten Rohrreihen, die von Ladeluft beaufschlagt werden, rippenlos auszuführen. Nachteilig hierbei ist, dass verschiedene Arten von Kühlrohren verbaut werden müssen.In DE-A 23 42 787 is another solution to this problem for a Intercooler described, which is constructed of finned tubes, which of coolant flows through which is over annular Ribs on the outer circumference the tubes cools the charge air flowing between the tubes. Around an overheating of cooling water To avoid in the pipes is provided, among other things, the first Pipe rows that are charged by charge air to perform ribless. Disadvantage here is that different types of cooling tubes must be installed.
Es ist Aufgabe der vorliegenden Erfindung, für einen Ladeluftkühler der eingangs genannten Art eine Überhitzung des Kühlmittels mit einfachen Mitteln, d. h. ohne Mehraufwand zu vermeiden.It Object of the present invention, for a charge air cooler of initially mentioned type overheating of the coolant with simple means, d. H. to avoid without extra effort.
Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des Patentanspruches 1. Erfindungsgemäß ist vorgesehen, dass die Innenrippe im Strömungskanal für die Ladeluft kürzer als der gesamte Strömungskanal ist. Damit ergibt sich im Eintritts- und/oder Austrittsbereich des Ladeluftströmungskanales eine innenrippenfreie Zone, welche einen reduzierten Wärmeübergang an der Kanalwandung zur Folge hat. Das außerhalb der Strömungskanäle strömende Kühlmittel wird somit im Eintritts- und/oder Austrittsbereich weniger erwärmt, damit werden lokale Überhitzungen, insbesondere ein Sieden des Kühlmittels wirksam vermieden. Die erfindungsgemäße Lösung ist außerordentlich einfach, da bisher verwendete Innenrippen lediglich gekürzt werden müssen. Die Strömungskanäle sind vorzugsweise als Flachrohre oder Stapelscheiben ausgebildet.The solution This object is apparent from the features of claim 1. According to the invention, it is provided that the inner rib in the flow channel for the Charge air shorter as the entire flow channel is. This results in the entry and / or exit area of Charge air flow channel an inner rib-free zone, which a reduced heat transfer at the channel wall has the consequence. The coolant flowing outside the flow channels is thus less heated in the entry and / or exit area, so be local overheating, in particular a boiling of the coolant effectively avoided. The solution according to the invention is extremely simple, since so far used inner ribs need only be shortened. The Flow channels are preferably formed as flat tubes or stacking discs.
In vorteilhafter Ausgestaltung der Erfindung kann der rippenfreie Bereich bzw. die innenrippenfreie Zone relativ kurz bemessen werden, d. h. etwa zwischen 5 und 15 mm, vorzugsweise ca. 10 mm – bei einer Gesamtlänge des Strömungskanals von etwa 100 bis 400 mm. Da diese Zone relativ kurz ist, ergeben sich für den Strömungskanal, der insbesondere als Flachrohr oder Stapelscheibe ausgebildet ist, auch keine Festigkeitsprobleme (die In nenrippe wirkt infolge ihrer Verlötung mit dem Flachrohr oder der Stapelscheibe auch als Zuganker).In Advantageous embodiment of the invention, the rib-free area or the inner rib-free zone are measured relatively short, d. H. approximately between 5 and 15 mm, preferably about 10 mm - at one overall length of the flow channel from about 100 to 400 mm. Since this zone is relatively short, yield for the flow channel, which is designed in particular as a flat tube or stacking disk, also no strength problems (the inner rib acts as a result of her soldering with the flat tube or the stacking disc as a tie rod).
In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Strömung des Kühlmittels im Bereich der innenrippenfreien Zonen quer zur Längsrichtung bzw. quer zur Ladeluftströmung geführt, d. h. in Richtung auf die beiden Kühlmittelanschlüsse, die seitlich am Gehäuse angeordnet sind. Die rippenfreie Zone kommt dieser Strömungsführung, die mit einer Verringerung der Kühlmittelströmungsgeschwindigkeit verbunden ist, zugute, d. h. sie ist insofern von Vorteil, als sich anderenfalls eine zu starke Erwärmung der quer verlaufenden Kühlmittelströmung ergeben würde.In a further advantageous embodiment of the invention is the flow of the coolant in the area of the inner rib-free zones transverse to the longitudinal direction or transverse to the charge air flow guided, d. H. towards the two coolant connections, the side on the housing are arranged. The rib-free zone comes with this flow guide, the with a reduction in the coolant flow rate connected, benefit, d. H. it is advantageous insofar as itself otherwise too much warming the transverse coolant flow would.
Die erfindungsgemäße Lösung mit innenrippenfreien Zonen beim Ladelufteintritt bzw. -austritt ist – wie erwähnt – nicht auf Ladeluftkühler mit Flachrohren beschränkt, sondern gilt auch für ähnliche Strömungskanäle, insbesondere für Stapelscheiben in Ladeluftkühlern in Stapelbauweise, wie sie z. B. durch die DE-A 195 11 991 der Anmelderin bekannt wurden. Auch dort sind in den Strömungskanälen für die Ladeluft Innenrippen bzw. Turbulenzeinlagen vorgesehen, welche im Ein- und Austrittsbereich erfindungsgemäß durch rippenfreie Zonen ersetzt werden können.The solution according to the invention with inner rib-free zones at the charge air inlet or outlet is - as mentioned - not limited to intercoolers with flat tubes, but also applies to similar flow channels, especially for stacking discs in intercoolers in stack construction, as z. B. by DE-A 195 11 991 of the Applicant known. Also there are in the flow channels for the charge air inside ribs or turbulence inserts seen, which can be replaced according to the invention in the inlet and outlet area by rib-free zones.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher beschrieben. Es zeigenembodiments The invention are illustrated in the drawings and will be described in more detail below. Show it
Das
Flachrohr
Das
Flachrohr
Bei
einem bevorzugten Ausführungsbeispiel weist
die Ladeluft bei ihrem Eintritt in die innenrippenfreie Zone
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005043294A DE102005043294A1 (en) | 2004-09-13 | 2005-09-09 | Charge-air cooler for motor vehicle has inner ribs in the flow channels with longitudinal extension shorter than length |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004044591.5 | 2004-09-13 | ||
DE102004044591 | 2004-09-13 | ||
DE102004049810.5 | 2004-10-12 | ||
DE102004049810 | 2004-10-12 | ||
DE102005043294A DE102005043294A1 (en) | 2004-09-13 | 2005-09-09 | Charge-air cooler for motor vehicle has inner ribs in the flow channels with longitudinal extension shorter than length |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005043294A1 true DE102005043294A1 (en) | 2006-03-30 |
Family
ID=36011829
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005043294A Withdrawn DE102005043294A1 (en) | 2004-09-13 | 2005-09-09 | Charge-air cooler for motor vehicle has inner ribs in the flow channels with longitudinal extension shorter than length |
Country Status (1)
Country | Link |
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DE (1) | DE102005043294A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006044154A1 (en) * | 2006-09-15 | 2008-05-21 | Behr Gmbh & Co. Kg | Stacked plate heat exchanger for charge air cooling |
-
2005
- 2005-09-09 DE DE102005043294A patent/DE102005043294A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006044154A1 (en) * | 2006-09-15 | 2008-05-21 | Behr Gmbh & Co. Kg | Stacked plate heat exchanger for charge air cooling |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20120403 |