EP0076928A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0076928A1
EP0076928A1 EP82108350A EP82108350A EP0076928A1 EP 0076928 A1 EP0076928 A1 EP 0076928A1 EP 82108350 A EP82108350 A EP 82108350A EP 82108350 A EP82108350 A EP 82108350A EP 0076928 A1 EP0076928 A1 EP 0076928A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
dummy
dirt
repellent material
air inlet
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Withdrawn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
EP82108350A
Other languages
German (de)
French (fr)
Inventor
Hans Stadler Obering
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz AG
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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0076928A1 publication Critical patent/EP0076928A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0366—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 plate-like or laminated conduits the conduits being formed by spaced plates with inserted elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments

Definitions

  • the invention relates to a heat exchanger with a close-meshed passage cross-section for air as a cooling medium, for example in a flat tube, lamella or plate construction, an interchangeable dummy with the same lattice structure as that of the heat exchanger being arranged in front of the cooling air inlet side.
  • the object is achieved according to the invention in that the dummy is made using a dirt-repellent material on its surface.
  • the dummy be made entirely of the dirt-repellent material.
  • the dummy is made of metal that has a coating of the dirt-repellent material. It is useful for saving weight if the dummy is designed as a sheet metal profile part coated with the dirt-repellent material.
  • the only figure shows a cross section through part of a heat exchanger with a dummy arranged on the cooling air inlet side according to the invention.
  • the heat exchanger 1 shown in horizontal section has an upper and lower box, not shown, which are connected to one another by vertically running plate-shaped hollow bodies 2 for guiding the medium to be cooled.
  • the plate-shaped hollow bodies 2 are formed from individual plates 3 and end spacers 4 by soldered or welded connections.
  • the individual plate-shaped hollow bodies 2 are arranged with respect to one another and connected to the upper and lower box in such a way that there are regular gaps 5 for the passage of air from one of the hollow bodies 2 to the other.
  • a grid-shaped dummy 6 is attached to the air inlet side of the heat exchanger 1 and, according to the drawing, has essentially the same structure as the heat exchanger itself.
  • the arrangement is such that the front of the plate-shaped Hollow body 2 tightly connect ribs 7 of the dummy 6, which in turn are congruent with the end faces or, as in the present exemplary embodiment, somewhat protruding.
  • the tight connection of the ribs 7 to the plate-shaped hollow body 2 results in a good transition, so that the cooling air flowing through the heat exchanger in the direction of the arrow remains undisturbed in the flow.
  • the dummy 6 consists of a dirt-repellent plastic on its surface, so that no dirt deposits restricting the passage cross-section for the cooling air can occur in the area of the cooling air inlet.
  • the dummy 6 from metal for reasons of stability, which is coated with a dirt-repellent material at least on the surfaces covered by the cooling air flow.
  • a material known under the brand name "Teflon" could be used to coat such a dummy for a heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The heat exchanger, especially for an internal combustion engine, is of flat-tube, gilled or plate design and carries air as coolant, there being arranged upstream of the cooling air inlet of the heat exchanger a replaceable trap, which is produced using a material which repels dirt on its surface and has the same lattice structure as the heat exchanger. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Wärmetauscher mit engmaschigem Durchtrittsquerschnitt für Luft als Kühlmedium, beispielsweise in Flachrohr-, Lamellen- oder Plattenbauweise, wobei vor der Kühllufteintrittsseite eine auswechselbare Attrappe mit der gleichen Gitterstruktur, wie sie der Wärmetauscher aufweist, angeordnet ist.The invention relates to a heat exchanger with a close-meshed passage cross-section for air as a cooling medium, for example in a flat tube, lamella or plate construction, an interchangeable dummy with the same lattice structure as that of the heat exchanger being arranged in front of the cooling air inlet side.

Bei Wärmetauschern genannter Art besteht das Problem der Verschmutzung insbesondere am Lufteintritt, so daß der Luftdurchtritt durch den Wärmetauscher behindert und dadurch die Kühlleistung vermindert wird. Erfahrungsgemäß lagern sich solche Verschmutzungen nur im Bereich des Lufteinlaufs in den Wärmetauscher ab, während die Kühlfläche selbst von Schmutzablagerungen weitgehend freibleibt.In heat exchangers of the type mentioned, there is the problem of contamination, particularly at the air inlet, so that the passage of air through the heat exchanger is hindered and the cooling capacity is thereby reduced. Experience has shown that such contamination is only deposited in the area of the air inlet into the heat exchanger, while the cooling surface itself remains largely free of dirt deposits.

Ausgehend von diesen Erkenntnissen, ist es Aufgabe der Erfindung, einen Wärmetauscher der eingangs umrissenen Gattung dahingehend zu verbessern, daß Schmutzablagerungen am Lufteinlauf des Wärmetauschers selbst bei stark staubhaltiger Kühlluft weitgehend vermieden werden.Based on these findings, it is an object of the invention to improve a heat exchanger of the type outlined at the outset in such a way that dirt deposits on the air inlet of the heat exchanger are largely avoided, even when the cooling air contains a lot of dust.

Die Aufgabe wird erfindungsgmäß dadurch gelöst, daß die Attrappe unter Verwendung eines seine Oberfläche schmutzabweisenden Werkstoffes hergestellt ist.The object is achieved according to the invention in that the dummy is made using a dirt-repellent material on its surface.

Durch die schmutzabweisende Eigenschaft der Oberfläche des verwendeten Werkstoffes können insbesondere gröbere Schmutzpartikel keinen Halt an der Oberfläche der Attrappe finden, so daß sie vom Luftstrom weggetragen werden und dabei auch feine, zur Ablagerung neigende Schmutzpartikelchen mitreißen. Auf diese Weise wird eine den Lufteinlauf in den Wärmetauscher behindernde Schmutzablagerung vermieden.Due to the dirt-repellent property of the surface of the material used, in particular coarser dirt particles cannot find a hold on the surface of the dummy, so that they are carried away by the air flow and also fine ones that tend to become deposited Take dirt particles with you. In this way, a dirt deposit which prevents the air from entering the heat exchanger is avoided.

Um die Herstellung der Attrappe möglichst einfach zu gestalten, wird vorgeschlagen, die.Attappe insgesamt aus dem schmutzabweisenden Werkstoff herzustellen.In order to make the manufacture of the dummy as simple as possible, it is proposed that the dummy be made entirely of the dirt-repellent material.

Es kann aber auch hinsichtlich einer guten Stabilität vorteilhaft sein, wenn die Attrappe aus Metall hergestellt ist, das eine Beschichtung aus dem schmutzabweisenden Werkstoff aufweist. Dabei ist es zur Gewichtsersparnis zweckdienlich, wenn die Attrappe als ein mit dem schmutzabweisenden Werkstoff beschichtetes Blechprofilteil ausgebildet ist.However, it can also be advantageous in terms of good stability if the dummy is made of metal that has a coating of the dirt-repellent material. It is useful for saving weight if the dummy is designed as a sheet metal profile part coated with the dirt-repellent material.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher beschrieben.The invention is described below using an exemplary embodiment with reference to the drawing.

Die einzige Abbildung zeigt einen Querschnitt durch einen Teil eines Wärmetauschers mit einer kühllufteintrittsseitig angeordneten Attrappe gemäß der Erfindung.The only figure shows a cross section through part of a heat exchanger with a dummy arranged on the cooling air inlet side according to the invention.

Der im Horizontalschnitt gezeigte Wärmetauscher 1 hat einen nicht dargestellten Ober- und Unterkasten, die durch vertikal verlaufende plattenförmige Hohlkörper 2 zur Führung des zu kühlenden Mediums miteinander verbunden sind. Die plattenförmigen Hohlkörper 2 sind aus einzelnen Platten 3 und stirnseitigen Abstandsstücken 4 durch Löt- oder Schweißverbindungen gebildet. Für den Durchtritt von Luft als Kühlmedium sind die einzelnen plattenförmigen Hohlkörper 2 so zueinander angeordnet und mit dem Ober- und Unterkasten verbunden, daß von einem der Hohlkörper 2 zum anderen jeweils regelmäßige Zwischenräume 5 für den Durchtritt von Luft vorhanden sind. An der Lufteintrittsseite des Wärmetauschers 1 ist eine gitterförmige Attrappe 6 befestigt, die gemäß Zeichnung im wesentlichen die gleiche Struktur wie der Wärmetauscher selbst aufweist. Dabei ist die Anordnung so getroffen, daß sich an den Stirnseiten der plattenförmigen Hohlkörper 2 Rippen 7 der Attrappe 6 dicht anschließen, die ihrerseits mit den Stirnseiten deckungsgleich oder, wie im vorliegenden Ausführungsbeispiel, etwas überstehend ausgebildet sind. Durch den dichten Anschluß der Rippen 7 an die plattenförmigen Hohlkörper 2 ergibt sich ein guter Übergang, so daß die in Pfeilrichtung durch den Wärmetauscher strömende Kühlluft in der Strömung ungestört bleibt. Die Attrappe 6 besteht aus einem an seiner Oberfläche schmutzabweisenden Kunststoff, damit im Bereich des Kühllufteintritts keine den Durchtrittsquerschnitt für die Kühlluft einengenden Schmutzablagerungen auftreten können. Es ist aber auch denkbar, die Attrappe 6 aus Gründen der Stabilität aus Metall herzustellen, das zumindest an den vom Kühlluftstrom bestrichenen Flächen mit einem schmutzabweisenden Werkstoff beschichtet ist. Zur Beschichtung einer solchen Attrappe für einen Wärmetauscher könnte beispielsweise ein unter der Markenbezeichnung "Teflon" bekannter Werkstoff Verwendung finden.The heat exchanger 1 shown in horizontal section has an upper and lower box, not shown, which are connected to one another by vertically running plate-shaped hollow bodies 2 for guiding the medium to be cooled. The plate-shaped hollow bodies 2 are formed from individual plates 3 and end spacers 4 by soldered or welded connections. For the passage of air as the cooling medium, the individual plate-shaped hollow bodies 2 are arranged with respect to one another and connected to the upper and lower box in such a way that there are regular gaps 5 for the passage of air from one of the hollow bodies 2 to the other. A grid-shaped dummy 6 is attached to the air inlet side of the heat exchanger 1 and, according to the drawing, has essentially the same structure as the heat exchanger itself. The arrangement is such that the front of the plate-shaped Hollow body 2 tightly connect ribs 7 of the dummy 6, which in turn are congruent with the end faces or, as in the present exemplary embodiment, somewhat protruding. The tight connection of the ribs 7 to the plate-shaped hollow body 2 results in a good transition, so that the cooling air flowing through the heat exchanger in the direction of the arrow remains undisturbed in the flow. The dummy 6 consists of a dirt-repellent plastic on its surface, so that no dirt deposits restricting the passage cross-section for the cooling air can occur in the area of the cooling air inlet. However, it is also conceivable to produce the dummy 6 from metal for reasons of stability, which is coated with a dirt-repellent material at least on the surfaces covered by the cooling air flow. For example, a material known under the brand name "Teflon" could be used to coat such a dummy for a heat exchanger.

Claims (4)

1. Wärmetauscher mit engmaschigem Durchtrittsquerschnitt für Luft als Kühlmedium, beispielsweise in Flachrohr-, Lamellen- oder Plattenbauweise, wobei vor der Kühllufteintrittsseite eine auswechselbare Attrappe mit der gleichen Gitterstruktur, wie sie der Wärmetauscher aufweist, angeordnet ist, nach Patentanmeldung P 31 10 448.7, dadurch gekennzeichnet, daß die Attrappe (6) unter Verwendung eines an seiner Oberfläche schmutzabweisenden Werkstoffes hergestellt ist.1. Heat exchanger with a close-meshed passage cross-section for air as a cooling medium, for example in a flat tube, lamella or plate construction, with an interchangeable dummy with the same lattice structure as that of the heat exchanger arranged in front of the cooling air inlet side, according to patent application P 31 10 448.7, thereby characterized in that the dummy (6) is made using a dirt-repellent material on its surface. 2. Wärmetauscher nach Anspruch l, dadurch gekennzeichnet, daß die Attrappe (6) insgesamt aus dem schmutzabweisenden Werkstoff besteht.2. Heat exchanger according to claim l, characterized in that the dummy (6) consists overall of the dirt-repellent material. 3. Wärmetauscher nach Anspruch 1, dadurch gekennzeichnet, daß die Attrappe (6) aus Metall hergestellt ist, das eine Beschichtung aus dem schmutzabweisenden Werkstoff aufweist.3. Heat exchanger according to claim 1, characterized in that the dummy (6) is made of metal which has a coating of the dirt-repellent material. 4. Wärmetauscher nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Attrappe (6) als ein mit dem schmutzabweisenden Werkstoff beschichtetes Blechprofilteil ausgebildet ist.4. Heat exchanger according to one of the preceding claims, characterized in that the dummy (6) is designed as a sheet metal profile part coated with the dirt-repellent material.
EP82108350A 1981-10-12 1982-09-10 Heat exchanger Withdrawn EP0076928A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813140408 DE3140408A1 (en) 1981-10-12 1981-10-12 HEAT EXCHANGER
DE3140408 1981-10-12

Publications (1)

Publication Number Publication Date
EP0076928A1 true EP0076928A1 (en) 1983-04-20

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EP82108350A Withdrawn EP0076928A1 (en) 1981-10-12 1982-09-10 Heat exchanger

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EP (1) EP0076928A1 (en)
DE (1) DE3140408A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998050751A1 (en) * 1997-05-07 1998-11-12 Volkswagen Aktiengesellschaft Device for protecting the radiator of a motor vehicle against projected particles
DE10238205A1 (en) * 2002-08-21 2004-03-04 Bayerische Motoren Werke Ag Heat exchanger especially compressor inter-cooler for combustion engine has cooling g pies, guide frame, with inflow and outflow apertures and chambers and protuberance in chamber wall
WO2013164084A1 (en) * 2012-05-01 2013-11-07 Benteler Automobiltechnik Gmbh Baffle plate in a heat exchanger
DE102017221083A1 (en) 2017-11-24 2019-05-29 Mahle International Gmbh Heat exchanger for a motor vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20307881U1 (en) * 2003-05-21 2004-09-23 Autokühler GmbH & Co. KG Heat exchanger/charge cooler for a motor vehicle, has pipes to form a heat exchanger network, a collector with a receiver and flow-conducting elements with tapered thicknesses
EP3891455A1 (en) 2019-02-07 2021-10-13 Hydac Cooling GmbH Heat exchanger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB582142A (en) * 1944-01-03 1946-11-06 Istvan Barna Bullet-proof radiator
GB1175157A (en) * 1966-03-19 1969-12-23 Ernst Kreiselmaier Improvements in or relating to Steam Condensers
GB2019552A (en) * 1978-04-25 1979-10-31 Sueddeutsche Kuehler Behr Cross-flow heat exchanger unit
DE3109955A1 (en) * 1981-03-14 1982-09-23 Kühlerfabrik Längerer & Reich, 7024 Filderstadt Heat exchanger of plate design for internal-combustion engines to be installed, in particular, in lorries/trucks or the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB582142A (en) * 1944-01-03 1946-11-06 Istvan Barna Bullet-proof radiator
GB1175157A (en) * 1966-03-19 1969-12-23 Ernst Kreiselmaier Improvements in or relating to Steam Condensers
GB2019552A (en) * 1978-04-25 1979-10-31 Sueddeutsche Kuehler Behr Cross-flow heat exchanger unit
DE3109955A1 (en) * 1981-03-14 1982-09-23 Kühlerfabrik Längerer & Reich, 7024 Filderstadt Heat exchanger of plate design for internal-combustion engines to be installed, in particular, in lorries/trucks or the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998050751A1 (en) * 1997-05-07 1998-11-12 Volkswagen Aktiengesellschaft Device for protecting the radiator of a motor vehicle against projected particles
DE10238205A1 (en) * 2002-08-21 2004-03-04 Bayerische Motoren Werke Ag Heat exchanger especially compressor inter-cooler for combustion engine has cooling g pies, guide frame, with inflow and outflow apertures and chambers and protuberance in chamber wall
WO2013164084A1 (en) * 2012-05-01 2013-11-07 Benteler Automobiltechnik Gmbh Baffle plate in a heat exchanger
DE102017221083A1 (en) 2017-11-24 2019-05-29 Mahle International Gmbh Heat exchanger for a motor vehicle

Also Published As

Publication number Publication date
DE3140408A1 (en) 1983-04-28

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19830325

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Inventor name: OBERING, HANS STADLER