EP1941164A1 - Apparatus for conveying a cooling air flow - Google Patents

Apparatus for conveying a cooling air flow

Info

Publication number
EP1941164A1
EP1941164A1 EP06806022A EP06806022A EP1941164A1 EP 1941164 A1 EP1941164 A1 EP 1941164A1 EP 06806022 A EP06806022 A EP 06806022A EP 06806022 A EP06806022 A EP 06806022A EP 1941164 A1 EP1941164 A1 EP 1941164A1
Authority
EP
European Patent Office
Prior art keywords
cooling
fan
air flow
heat sink
cooling air
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.)
Granted
Application number
EP06806022A
Other languages
German (de)
French (fr)
Other versions
EP1941164B1 (en
Inventor
Thomas Bielesch
Benjamin Schweizer
Michael Spieth
Ulrich Vollert
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 Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1941164A1 publication Critical patent/EP1941164A1/en
Application granted granted Critical
Publication of EP1941164B1 publication Critical patent/EP1941164B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F04D29/526—Details of the casing section radially opposing blade tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives

Definitions

  • the invention relates to a device for conveying a cooling air flow according to the preamble of claim 1.
  • a radial fan for a heating and / or air conditioning of a motor vehicle wherein a motor holder is designed as a fan frame, on which a power electronics is arranged.
  • the fan cowl is designed as a metal part and thus performs the resulting in the power electronics or the control unit heat loss indirectly from the sucked air from the fan.
  • a radiator fan for motor vehicles has been known, ie a device for conveying a cooling air flow by means of an electric motor-driven axial fan for a coolant radiator of a motor vehicle.
  • the drive has control electronics on a printed circuit board in an electronics housing, which is fastened to a fan cowl (fan cowl).
  • the fan frame is attached to the radiator and has a Zargenö réelle in which a jacket fan rotates.
  • the sucked by the radiator cooling air flow is thus channeled through the fan frame and conveyed through the frame opening.
  • a heat sink with cooling fins is arranged, which protrude into the cooling air flow, either upstream or downstream of the fan.
  • the cooling ribs protrude radially into the outer diameter of the fan or the fan casing. Disadvantages are on the one hand the additional axial space, on the other hand, the unwanted noise, especially in an arrangement of the cooling fins on the upstream side of the fan.
  • the heat sink is arranged radially outside of the frame opening and is acted upon by a secondary flow of the cooling air flow.
  • the heat sink, the elements for heat dissipation, z. B. in the form of cooling fins or cooling pins, thus does not protrude into the main cooling air flow - this results in the advantage that unpleasant noise can be avoided because the cooling air flow remains undisturbed.
  • the fan is designed as a fan-type fan which, in the direction of airflow, is behind the door opening. tion or the Zargeneinlauf is arranged.
  • a gap is left in the axial direction between the frame and fan shroud, whereby a side stream is generated, which sweeps over the cooling fins or cooling pins of the heat sink and thus achieves a cooling effect.
  • the direction of the secondary current depends on the operating status of the fan or on the pressure gradient in front of and behind the fan. If the fan is sucked in from the area of the fan cowl, it also sucks in the sidestream via the gap, which produces a vertical vortex in the form of a recirculation flow. If the fan is over-blown, so that a higher pressure upstream of the fan than behind the fan, the direction of the bypass will reverse by adjusting a leakage current through the gap across the cooling fins. Also in this case, a cooling effect is achieved.
  • the frame opening is bounded by a cylindrical Zargenring in which the shell fan rotates while radially outwardly of the Zargenringes a bypass channel is arranged, which leads over the heat sink or its heat dissipating elements.
  • a bypass channel is arranged, which leads over the heat sink or its heat dissipating elements.
  • the bypass channel acts as a true bypass, through which a secondary flow flows in the same direction as the main cooling air flow.
  • a recirculation flow will be more likely to occur, i. H. the fan sucks already delivered cooling air via the bypass channel.
  • a portion of the heat sink is disposed radially within the Zargenringes or the fan shroud, ie, a portion of the cooling fins or cooling pins protrudes into the main cooling air flow, on the downstream side of the fan.
  • a portion of the heat dissipating elements is radially outward and another downstream portion radially outside and within the Zargenö réelle or the cladding diameter.
  • the cooling fins or so-called cooling dome protrude with a different height from the base plate of the heat sink.
  • the heat sink or its newly formed base plate extends both in the axial direction and in the circumferential direction.
  • the height of the cooling fins or cooling pins is adapted to the diameter of the Zargenringes or the fan shroud, so that on the circumference an approximately equal distance between the cooling fins and Zargenrise is achieved , Even so, the advantage of improved cooling effect is achieved.
  • FIG. 1 shows a fan control device with heat sink radially outside a fan shroud (first embodiment of the invention)
  • FIG. 4 shows a second exemplary embodiment of the invention with a heat sink arranged radially outside a frame ring and a bypass channel for the heat sink, FIG.
  • FIG. 5 shows a further exemplary embodiment of a heat sink
  • FIG. 6 shows a third embodiment of the invention with heat sink, the cooling pins are arranged both radially outside of the shell fan and within the shell diameter,
  • FIG. 7 shows the heat sink for the embodiment according to FIG. 6 in FIG.
  • FIG. 9 shows the heat sink in cross section according to the line IX-IX, FIG.
  • Fig. 10 shows the heat sink in longitudinal section along the line X-X and
  • Fig. 11 shows the heat sink in a view.
  • Fig. 1 shows a partially illustrated fan frame 1 with a frame opening 2, which is bounded by a Zargeneinlauf 3. Within the frame Opening 2 is arranged only a partially illustrated jacket fan 4, which also has only partially shown fan blades 4a and a connecting their sheath 5 mantle.
  • the fan frame 1 corresponds in its entire training and function as the disclosed in the aforementioned prior art fan shroud for a coolant radiator of a motor vehicle and is thus downstream of a coolant radiator, not shown, or a cooling module of a motor vehicle.
  • the fan 4 may be connected in a manner not shown with the frame 1 and is driven by an electric motor, not shown, which is controlled by a control unit 6.
  • control unit 6 In the control unit 6, not shown electronic components, so-called power electronics are arranged, whose heat loss via a heat sink 7, connected to the control unit 6, is dissipated.
  • a main cooling air flow is conveyed in the direction of the arrow L and sucked by the or the heat exchanger, not shown.
  • an axial gap 8 is left, which allows a leakage or secondary air flow.
  • the secondary flow is represented by dashed lines and denoted by N: with an intake fan 4, a recirculation flow in the form of a vortex N is formed, with the secondary flow being sucked in by the cooling air flow L through the gap 8 via the heat sink 7.
  • the heat sink 7 is thus cooled by convection.
  • the direction of the secondary flow N can then be reversed if the fan 4 is "over-blown” at a high vehicle speed, ie at a correspondingly high back pressure
  • the fan 4 then no longer supplies the air flow with energy and acts as a resistance "push" a side stream through the gap 8, which extends over the heat sink 7 in the direction of a dotted arrow N '.
  • Fig. 2 and Fig. 2a show the heat sink 7 in a plan view and a side view.
  • a metallic, planar base plate 7a vertically projecting pins or so-called cooling domes 7b are arranged in rows and offset from one another.
  • the air flow direction is indicated by an arrow P.
  • the base plate 7a is in heat conductive connection with the power electronics of the control unit 6, so that the dissipated heat loss passes through the line in the cooling dome 7b, from where it is discharged via convection to an air flow.
  • FIG. 3 and FIG. 3 a show a modified heat sink T with variable height of the cooling domes 7'b, which varies between a minimum height h ⁇ approximately in the middle and a maximum height h1 in the outer region.
  • the height of the cooling domes 7'b is adapted to the circular circumference of the fan casing 5, so that a better cooling effect results.
  • FIG. 4 shows a further exemplary embodiment of the invention with a fan frame 10, a circular frame opening 11, which is delimited by a hollow-cylindrical frame ring 12.
  • a jacket fan 13 with partially indicated fan blades 13a and a jacket 14 to.
  • the jacket 14 forms a radial gap 15 with the frame ring 12.
  • the jacket 14 has an end-side inlet region 14a, and the frame ring 12 has an end-side inlet region 12a, which overlap in the radial direction.
  • a control unit 16 is arranged, which is heat-conductively connected to a heat sink 17.
  • the heat sink 17 has two plates 17a, 17b, through which a bypass channel 18 is formed, which communicates with a passage opening 19 in the fan frame 10 in flow communication.
  • a bypass channel 18 Within the bypass channel 18 heat dissipating elements 17c are arranged.
  • the bypass channel 18 allows a bypass flow, represented by dashed arrows N, to pass through-parallel to the main cooling air flow, represented by the arrow L.
  • this bypass flow will only set if a corresponding overpressure exists within the fan cowl 10 , caused by a corresponding dynamic pressure prevails. Otherwise, d. H. with suction fan 13, the flow direction in the bypass channel 18 will reverse, and it will form a Rezirkulationsströmung, wherein the fan 13 already sucks already conveyed cooling air through the bypass channel 18 again.
  • Fig. 5 shows the heat sink 17 for the embodiment of FIG. 4 with air flow direction P or P '.
  • Cooling dome 17c On the base plate 17a are turn Cooling dome 17c arranged, which are bounded laterally by channel walls 17d, 17e.
  • the cooling domes 17c are in turn arranged in rows and offset from each other, so that there is a very good cooling effect by convection.
  • Fig. 6 shows a third embodiment of the invention with a frame 20, which has a Zargenö réelle 21, which is bounded by an approximately bell-shaped Zargeneinlauf 22.
  • a jacket fan 23 is arranged with a jacket 24, wherein the jacket is arranged in the air flow direction L downstream of the Zargeneinlaufes 22 is arranged.
  • an axial gap 25 is left, which generates a leakage or secondary flow.
  • a fan control unit 26 is arranged, which is heat-conductively connected to a base plate 27 a of a heat sink 27.
  • the shorter cooling domes 27b are arranged radially outside the fan casing 24, while the downstream (in the direction of the arrows L) cooling domes 27c have a greater height and extend into the main cooling air flow L, d. H. extend into the diameter of the fan shroud 24.
  • the tips of the cooling domes 27c are thus flowed around and cooled by the main cooling air flow L.
  • the shorter cooling domes 27b are surrounded by a secondary flow, represented by the arrows N, which adjusts as a result of the fan rotation and the axial gap 25.
  • the secondary flow N is thus directed substantially counter to the main stream L.
  • cooling domes 27b, 27c Due to the combination of cooling domes 27b, 27c extending radially outside the fan casing 24 and radially inside the shell diameter, an enhanced cooling effect, i. H. achieves a better heat dissipation of the power loss.
  • FIGS. 7 to 11 show the heat sink 27 for the exemplary embodiment according to FIG. 6.
  • FIG. 7 shows an isometric view of the heat sink 27, wherein the different heights of the cooling domes 27b, 27c are clearly recognizable. are bar. The change in height takes place both in the axial direction and in the circumferential direction.
  • Fig. 8 shows a plan view of the heat sink 27 with staggered the arrangement of the cooling dome 27b, 27c.
  • FIG. 9 shows a cross section along the line IX-IX 1, wherein the different heights h1 for the shorter cooling domes 27b and the heights h2 for the longer cooling domes 27c are shown.
  • Fig. 10 a longitudinal section along the line XX, shows that the height of the cooling dome 27b also varies in the circumferential direction, along a circular arc K, which corresponds to the circumference of the fan shroud 24 (see Fig. 6).
  • FIG. 11 shows the heat sink 27 in a view, again showing the varying height of the cooling domes adapted to circular arcs K and KO.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention relates to an apparatus for conveying a cooling air flow for at least one heat exchanger, especially for motor vehicles. Said apparatus comprises a fan frame (1) with a frame opening (2), a fan wheel (4) that revolves in the frame opening, and a fan drive unit with a fan control device (6) which is disposed in the peripheral zone of the frame opening (2) and can be cooled by means of a cooling member (7). At least one part of the cooling member (7) is arranged radially outside the frame opening (2) and can be impinged upon by a secondary flow (N) of the cooling air flow (L).

Description

BEHR GmbH & Co. KG Mauserstraße 3, 70469 Stuttgart BEHR GmbH & Co. KG Mauserstrasse 3, 70469 Stuttgart
Vorrichtung zur Förderung eines KühlluftstromesDevice for conveying a cooling air flow
Die Erfindung betrifft eine Vorrichtung zur Förderung eines Kühlluftstromes nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device for conveying a cooling air flow according to the preamble of claim 1.
Vorrichtungen zur Förderung eines Kühlluftstromes sind als Lüftergebläse für einen Kühlmittelkühler oder ein Kühlmodul und als Heizungs- oder Klimagebläse für Kraftfahrzeuge bekannt. Der Lüfter bzw. das Gebläserad wird elektromotorisch angetrieben, wobei der Antrieb durch eine elektronische Steuer- einrichtung geregelt wird, welche Verlustwärme abgibt. Die elektronische Steuereinrichtung muss daher gekühlt werden, wozu so genannte Kühlkörper verwendet werden, die einerseits mit dem Steuergerät in Wärme leitender Verbindung stehen und andererseits Kühlrippen oder -stifte, so genannte Kühldome aufweisen, welche von einem Kühlluftstrom beaufschlagt werden. Ein derartiger Kühlkörper, wurde z. B. durch die EP 0 278 240 A2 der Anmelderin bekannt.Devices for conveying a cooling air flow are known as fan blower for a coolant radiator or a cooling module and as a heating or Klimagebläse for motor vehicles. The fan or the impeller is driven by an electric motor, wherein the drive is controlled by an electronic control device which dissipates heat loss. The electronic control device must therefore be cooled, for which purpose so-called heat sinks are used which, on the one hand, are in heat-conducting connection with the control unit and, on the other hand, have cooling ribs or pins, so-called cooling domes, which are acted on by a cooling air flow. Such a heat sink, z. As known from EP 0 278 240 A2 of the applicant.
Durch die DE 35 23 223 A1 der Anmelderin wurde ein Radialgebläse für eine Heizungs- und/oder Klimaanlage eines Kraftfahrzeuges bekannt, wobei ein Motorhalter als Lüfterzarge ausgebildet ist, auf welcher eine Leistungselektronik angeordnet ist. Die Lüfterzarge ist als Metallteil ausgebildet und führt somit die in der Leistungselektronik bzw. dem Steuergerät entstehende Verlustwärme mittelbar an den vom Gebläse angesaugten Luftstrom ab. Durch die DE 196 12 679 C2 wurde ein Kühlerventilator für Kraftfahrzeuge bekannt, d. h. eine Vorrichtung zur Förderung eines Kühlluftstromes mittels eines elektromotorisch angetriebenen Axiallüfters für einen Kühlmittelkühler eines Kraftfahrzeuges. Der Antrieb weist eine Steuerelektronik auf einer Lei- terplatte in einem Elektronikgehäuse auf, welches an einer Lüfterzarge (Lüfterhaube) befestigt ist. Die Lüfterzarge ist am Kühler befestigt und weist eine Zargenöffnung auf, in welcher ein Mantellüfter umläuft. Der durch den Kühler angesaugte Kühlluftstrom wird somit durch die Lüfterzarge kanalisiert und durch die Zargenöffnung gefördert. Am Elektronikgehäuse ist ein Kühlkörper mit Kühlrippen angeordnet, welche in den Kühlluftstrom hineinragen, und zwar entweder stromaufwärts oder stromabwärts des Lüfters. In jedem Fall ragen die Kühlrippen radial in den Außendurchmesser des Lüfters bzw. den Lüftermantel hinein. Nachteilig sind einerseits der zusätzliche axiale Bauraum, andererseits die unerwünschte Geräuschentwicklung, insbesondere bei einer Anordnung der Kühlrippen auf der Zustromseite des Lüfters.By DE 35 23 223 A1 of the applicant, a radial fan for a heating and / or air conditioning of a motor vehicle was known, wherein a motor holder is designed as a fan frame, on which a power electronics is arranged. The fan cowl is designed as a metal part and thus performs the resulting in the power electronics or the control unit heat loss indirectly from the sucked air from the fan. From DE 196 12 679 C2, a radiator fan for motor vehicles has been known, ie a device for conveying a cooling air flow by means of an electric motor-driven axial fan for a coolant radiator of a motor vehicle. The drive has control electronics on a printed circuit board in an electronics housing, which is fastened to a fan cowl (fan cowl). The fan frame is attached to the radiator and has a Zargenöffnung in which a jacket fan rotates. The sucked by the radiator cooling air flow is thus channeled through the fan frame and conveyed through the frame opening. On the electronics housing, a heat sink with cooling fins is arranged, which protrude into the cooling air flow, either upstream or downstream of the fan. In any case, the cooling ribs protrude radially into the outer diameter of the fan or the fan casing. Disadvantages are on the one hand the additional axial space, on the other hand, the unwanted noise, especially in an arrangement of the cooling fins on the upstream side of the fan.
Es ist Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur Förderung eines Kühlluftstromes der eingangs genannten Art hinsichtlich der Elektronikkühlung zu verbessern, insbesondere bei Vermeidung unerwünschter Ge- räuschentwicklung und zusätzlichen Bauraumes.It is an object of the present invention to improve a device for promoting a cooling air flow of the type mentioned in terms of the electronics cooling, in particular while avoiding unwanted noise development and additional installation space.
Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.This object is solved by the features of claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims.
Erfindungsgemäß ist vorgesehen, dass mindestens ein Teil des Kühlkörpers radial außerhalb der Zargenöffnung angeordnet und von einem Nebenstrom des Kühlluftstromes beaufschlagt wird. Der Kühlkörper, der Elemente zur Wärmeabfuhr, z. B. in Form von Kühlrippen oder Kühlstiften aufweist, ragt somit nicht in den Haupt-Kühlluftstrom - daraus resultiert der Vorteil, dass unangenehme Geräusche vermieden werden, da der Kühlluftstrom ungestört bleibt.According to the invention it is provided that at least a part of the heat sink is arranged radially outside of the frame opening and is acted upon by a secondary flow of the cooling air flow. The heat sink, the elements for heat dissipation, z. B. in the form of cooling fins or cooling pins, thus does not protrude into the main cooling air flow - this results in the advantage that unpleasant noise can be avoided because the cooling air flow remains undisturbed.
Nach einer vorteilhaften Ausgestaltung der Erfindung ist der Lüfter als Man- tellüfter ausgebildet, welcher in Luftströmungsrichtung hinter der Zargenöff- nung bzw. dem Zargeneinlauf angeordnet ist. Dabei ist in axialer Richtung zwischen Zarge und Lüftermantel ein Spalt belassen, wodurch ein Nebenstrom erzeugt wird, welcher über die Kühlrippen bzw. Kühlstifte des Kühlkörpers streicht und somit einen Kühleffekt erzielt. Die Richtung des Neben- Stromes hängt vom Betriebszustand des Lüfters ab bzw. von dem Druckgefälle vor und hinter dem Lüfter. Saugt der Lüfter aus dem Bereich der Lüfterzarge an, saugt er auch über den Spalt den Nebenstrom an, welcher einen stehenden Wirbel in Form einer Rezirkulationsströmung erzeugt. Wird der Lüfter überblasen, so dass sich vor dem Lüfter ein höherer Druck als hinter dem Lüfter einstellt, wird sich die Richtung des Nebenstromes umkehren, indem sich ein Leckagestrom durch den Spalt über die Kühlrippen einstellt. Auch in diesem Falle wird ein Kühleffekt erzielt.According to an advantageous embodiment of the invention, the fan is designed as a fan-type fan which, in the direction of airflow, is behind the door opening. tion or the Zargeneinlauf is arranged. In this case, a gap is left in the axial direction between the frame and fan shroud, whereby a side stream is generated, which sweeps over the cooling fins or cooling pins of the heat sink and thus achieves a cooling effect. The direction of the secondary current depends on the operating status of the fan or on the pressure gradient in front of and behind the fan. If the fan is sucked in from the area of the fan cowl, it also sucks in the sidestream via the gap, which produces a vertical vortex in the form of a recirculation flow. If the fan is over-blown, so that a higher pressure upstream of the fan than behind the fan, the direction of the bypass will reverse by adjusting a leakage current through the gap across the cooling fins. Also in this case, a cooling effect is achieved.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung wird die Zar- genöffnung durch einen zylindrischen Zargenring begrenzt, in welchem der Mantellüfter umläuft, während radial außerhalb des Zargenringes ein By- passkanal angeordnet ist, welcher über den Kühlkörper bzw. dessen Wärme abführende Elemente führt. Durch diesen Bypasskanal ergibt sich ebenfalls ein kühlender Nebenstrom, welcher - je nach Arbeitspunkt des Lüfters bzw. dem anliegenden Druckgefälle - in der Strömungsrichtung wechselt. Wird der Lüfter aufgrund hoher Geschwindigkeit des Fahrzeuges und hohen Staudruckes überblasen, so wirkt der Bypasskanal als echter Bypass, durch welchen ein Nebenstrom in gleicher Richtung wie der Haupt-Kühlluftstrom strömt. Bei Saugbetrieb des Lüfters wird sich dagegen eher eine Rezirkulati- onsströmung einstellen, d. h. der Lüfter saugt bereits geförderte Kühlluft über den Bypasskanal an.According to a further advantageous embodiment of the invention, the frame opening is bounded by a cylindrical Zargenring in which the shell fan rotates while radially outwardly of the Zargenringes a bypass channel is arranged, which leads over the heat sink or its heat dissipating elements. Through this bypass channel also results in a cooling side stream, which - depending on the operating point of the fan or the applied pressure gradient - changes in the flow direction. If the fan is over-blown due to the high speed of the vehicle and high dynamic pressure, the bypass channel acts as a true bypass, through which a secondary flow flows in the same direction as the main cooling air flow. In the case of suction operation of the fan, on the other hand, a recirculation flow will be more likely to occur, i. H. the fan sucks already delivered cooling air via the bypass channel.
Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist ein Teil des Kühlkörpers radial innerhalb des Zargenringes bzw. des Lüftermantels angeordnet, d. h. ein Bereich der Kühlrippen oder Kühlstifte ragt in den Haupt-Kühlluftstrom hinein, und zwar auf der Abströmseite des Lüfters. Somit liegt ein Teil der Wärme abführenden Elemente radial außerhalb und ein weiterer stromabwärts gelegener Teil radial außerhalb und innerhalb der Zargenöffnung bzw. des Manteldurchmessers. Damit wird der Vorteil eines erhöhten Kühleffektes erreicht. Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ragen die Kühlrippen oder so genannte Kühldome mit einer unterschiedlichen Höhe von der Grundplatte des Kühlkörpers ab. Der Kühlkörper bzw. seine eben ausgebildete Grundplatte erstreckt sich sowohl in axialer Richtung als auch in Umfangsrichtung. Um den Strömungsquerschnitt zwischen Grundplatte und Zargenring bzw. Lüftermantel möglichst effektiv zu nutzen, ist die Höhe der Kühlrippen bzw. Kühlstifte an den Durchmesser des Zargenringes des bzw. des Lüftermantels angepasst, so dass auf dem Umfang ein annähernd gleicher Abstand zwischen Kühlrippen und Zargenumfang erreicht wird. Auch damit wird der Vorteil einer verbesserten Kühlwirkung erreicht.According to a further advantageous embodiment of the invention, a portion of the heat sink is disposed radially within the Zargenringes or the fan shroud, ie, a portion of the cooling fins or cooling pins protrudes into the main cooling air flow, on the downstream side of the fan. Thus, a portion of the heat dissipating elements is radially outward and another downstream portion radially outside and within the Zargenöffnung or the cladding diameter. This achieves the advantage of an increased cooling effect. According to a further advantageous embodiment of the invention, the cooling fins or so-called cooling dome protrude with a different height from the base plate of the heat sink. The heat sink or its newly formed base plate extends both in the axial direction and in the circumferential direction. In order to use the flow cross-section between the base plate and Zargenring or fan shroud as effectively as possible, the height of the cooling fins or cooling pins is adapted to the diameter of the Zargenringes or the fan shroud, so that on the circumference an approximately equal distance between the cooling fins and Zargenumfang is achieved , Even so, the advantage of improved cooling effect is achieved.
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher erläutert. Es zeigenEmbodiments of the invention are illustrated in the drawings and will be explained in more detail below. Show it
Fig. 1 ein Lüftersteuergerät mit Kühlkörper radial außerhalb eines Lüftermantels (erstes Ausführungsbeispiel der Erfindung),1 shows a fan control device with heat sink radially outside a fan shroud (first embodiment of the invention),
Fig. 2, 2a einen Kühlkörper mit konstanter Stifthöhe,2, 2a a heat sink with a constant pin height,
Fig. 3, 3a einen Kühlkörper mit variabler Stifthöhe, Fig. 4 ein zweites Ausführungsbeispiel der Erfindung mit radial außerhalb eines Zargenringes angeordnetem Kühlkörper und Bypass- kanal für den Kühlkörper,4 shows a second exemplary embodiment of the invention with a heat sink arranged radially outside a frame ring and a bypass channel for the heat sink, FIG.
Fig. 5 ein weiteres Ausführungsbeispiel für einen Kühlkörper,5 shows a further exemplary embodiment of a heat sink,
Fig. 6 ein drittes Ausführungsbeispiel der Erfindung mit Kühlkörper, dessen Kühlstifte sowohl radial außerhalb des Mantellüfters als auch innerhalb des Manteldurchmessers angeordnet sind,6 shows a third embodiment of the invention with heat sink, the cooling pins are arranged both radially outside of the shell fan and within the shell diameter,
Fig. 7 den Kühlkörper für das Ausführungsbeispiel gemäß Fig. 6 in 3-7 shows the heat sink for the embodiment according to FIG. 6 in FIG.
D-Darstellung,D representation,
Fig. 8 den Kühlkörper in einer Draufsicht, Fig. 9 den Kühlkörper im Querschnitt gemäß der Linie IX-IX,9 shows the heat sink in cross section according to the line IX-IX, FIG.
Fig. 10 den Kühlkörper im Längsschnitt gemäß der Linie X-X undFig. 10 shows the heat sink in longitudinal section along the line X-X and
Fig. 11 den Kühlkörper in einer Ansicht.Fig. 11 shows the heat sink in a view.
Fig. 1 zeigt eine teilweise dargestellte Lüfterzarge 1 mit einer Zargenöffnung 2, welche von einem Zargeneinlauf 3 begrenzt wird. Innerhalb der Zargen- öffnung 2 ist ein nur teilweise dargestellter Mantellüfter 4 angeordnet, welcher ebenfalls nur teilweise dargestellte Lüfterschaufeln 4a und einen deren Spitzen verbindenden Mantel 5 aufweist. Die Lüfterzarge 1 entspricht in ihrer gesamten Ausbildung und Funktion etwa der im eingangs genannten Stand der Technik offenbarten Lüfterzarge für einen Kühlmittelkühler eines Kraftfahrzeuges und ist somit stromabwärts von einem nicht dargestellten Kühlmittelkühler oder einem Kühlmodul eines Kraftfahrzeuges angeordnet. Der Lüfter 4 kann auf nicht dargestellte Weise mit der Zarge 1 verbunden sein und wird durch einen nicht dargestellten Elektromotor angetrieben, welcher über ein Steuergerät 6 geregelt wird. In dem Steuergerät 6 sind nicht dargestellte Elektronikbauteile, so genannte Leistungselektronik angeordnet, deren Verlustwärme über einen Kühlkörper 7, verbunden mit dem Steuergerät 6, abgeführt wird. Der Kühlkörper 7, welcher hier nicht dargestellte Elemente zur Wärmeabfuhr aufweist, ist radial außerhalb des Lüftermantels 5 ange- ordnet. Innerhalb des Mantels 5 wird ein Haupt-Kühlluftstrom in Richtung des Pfeiles L gefördert und durch den bzw. die nicht dargestellten Wärmeübertrager gesaugt. Zwischen dem (ortsfesten) Zargeneinlauf 3 und dem (umlaufenden) Lüftermantel 5 ist ein Axialspalt 8 belassen, welcher einen Leckage- oder Neben luftstrom ermöglicht. Der Nebenstrom ist gestrichelt dar- gestellt und durch N bezeichnet: bei saugendem Lüfter 4 bildet sich eine Re- zirkulationsströmung in Form eines Wirbels N aus, wobei der Nebenstrom vom Kühlluftstrom L durch den Spalt 8 über den Kühlkörper 7 angesaugt wird. Der Kühlkörper 7 wird somit durch Konvektion gekühlt. Die Richtung des Nebenstromes N kann sich dann umkehren, wenn der Lüfter 4 bei hoher Fahrzeuggeschwindigkeit, d. h. bei entsprechend hohem Staudruck „überblasen" wird. Der Lüfter 4 führt dann dem Luftstrom keine Energie mehr zu und wirkt als Widerstand. In diesem Falle wird der Staudruck einen Nebenstrom durch den Spalt 8 „drücken", welcher über den Kühlkörper 7 in Richtung eines punktierten Pfeils N' verläuft.Fig. 1 shows a partially illustrated fan frame 1 with a frame opening 2, which is bounded by a Zargeneinlauf 3. Within the frame Opening 2 is arranged only a partially illustrated jacket fan 4, which also has only partially shown fan blades 4a and a connecting their sheath 5 mantle. The fan frame 1 corresponds in its entire training and function as the disclosed in the aforementioned prior art fan shroud for a coolant radiator of a motor vehicle and is thus downstream of a coolant radiator, not shown, or a cooling module of a motor vehicle. The fan 4 may be connected in a manner not shown with the frame 1 and is driven by an electric motor, not shown, which is controlled by a control unit 6. In the control unit 6, not shown electronic components, so-called power electronics are arranged, whose heat loss via a heat sink 7, connected to the control unit 6, is dissipated. The heat sink 7, which has not shown here elements for heat dissipation, is radially outside the fan shroud 5 arranged. Within the shell 5, a main cooling air flow is conveyed in the direction of the arrow L and sucked by the or the heat exchanger, not shown. Between the (stationary) Zargeneinlauf 3 and the (rotating) fan casing 5, an axial gap 8 is left, which allows a leakage or secondary air flow. The secondary flow is represented by dashed lines and denoted by N: with an intake fan 4, a recirculation flow in the form of a vortex N is formed, with the secondary flow being sucked in by the cooling air flow L through the gap 8 via the heat sink 7. The heat sink 7 is thus cooled by convection. The direction of the secondary flow N can then be reversed if the fan 4 is "over-blown" at a high vehicle speed, ie at a correspondingly high back pressure The fan 4 then no longer supplies the air flow with energy and acts as a resistance "push" a side stream through the gap 8, which extends over the heat sink 7 in the direction of a dotted arrow N '.
Fig. 2 und Fig. 2a zeigen den Kühlkörper 7 in einer Draufsicht und einer Seitenansicht. Auf einer metallischen, ebenen Grundplatte 7a sind senkrecht abragende Stifte oder so genannte Kühldome 7b in Reihen und versetzt zueinander angeordnet. Die Luftströmungsrichtung ist durch einen Pfeil P ge- kennzeichnet. Die Grundplatte 7a steht in Wärme leitender Verbindung mit der Leistungselektronik des Steuergerätes 6, so dass die abzuführende Verlustwärme durch Leitung in die Kühldome 7b gelangt, von wo aus sie über Konvektion an einen Luftstrom abgeführt wird.Fig. 2 and Fig. 2a show the heat sink 7 in a plan view and a side view. On a metallic, planar base plate 7a, vertically projecting pins or so-called cooling domes 7b are arranged in rows and offset from one another. The air flow direction is indicated by an arrow P. The base plate 7a is in heat conductive connection with the power electronics of the control unit 6, so that the dissipated heat loss passes through the line in the cooling dome 7b, from where it is discharged via convection to an air flow.
Fig. 3 und Fig. 3a zeigen einen abgeänderten Kühlkörper T mit variabler Höhe der Kühldome 7'b, welche zwischen einer minimalen Höhe hθ etwa in der Mitte und einer maximalen Höhe h1 im Außenbereich variiert. Die Höhe der Kühldome 7'b ist an den kreisförmigen Umfang des Lüftermantels 5 an- gepasst, so dass sich eine bessere Kühlwirkung ergibt.FIG. 3 and FIG. 3 a show a modified heat sink T with variable height of the cooling domes 7'b, which varies between a minimum height hθ approximately in the middle and a maximum height h1 in the outer region. The height of the cooling domes 7'b is adapted to the circular circumference of the fan casing 5, so that a better cooling effect results.
Fig. 4 zeigt ein weiteres Ausführungsbeispiel der Erfindung mit einer Lüfterzarge 10, einer kreisförmigen Zargenöffnung 11 , welche von einem hohlzy- lindrisch ausgebildeten Zargenring 12 begrenzt wird. Innerhalb des Zargenringes 12 läuft ein Mantellüfter 13 mit teilweise angedeuteten Lüfterschaufeln 13a und einem Mantel 14 um. Der Mantel 14 bildet mit dem Zargenring 12 einen Radialspalt 15. Der Mantel 14 weist einen stirnseitigen Einlaufbereich 14a, und der Zargenring 12 einen stirnseitigen Einlaufbereich 12a auf, welche sich in radialer Richtung überlappen. Radial außerhalb des Zargenringes 12 ist ein Steuergerät 16 angeordnet, welches Wärme leitend mit einem Kühlkörper 17 verbunden ist. Der Kühlkörper 17 weist zwei Platten 17a, 17b auf, durch welche ein Bypasskanal 18 gebildet wird, welcher mit einer Durchtrittsöffnung 19 in der Lüfterzarge 10 in Strömungsverbindung steht. Innerhalb des Bypasskanals 18 sind Wärme abführende Elemente 17c angeordnet. Der Bypasskanal 18 lässt bei einem entsprechenden Druckgefälle ei- nen Bypassstrom, dargestellt durch gestrichelte Pfeile N, durch - parallel zum Haupt-Kühlluftstrom, dargestellt durch den Pfeil L. Dieser Bypassstrom wird sich allerdings nur dann einstellen, wenn innerhalb der Lüfterzarge 10 ein entsprechender Überdruck, hervorgerufen durch einen entsprechenden Staudruck herrscht. Anderenfalls, d. h. bei saugendem Lüfter 13 wird sich die Strömungsrichtung im Bypasskanal 18 umkehren, und es wird sich eine Rezirkulationsströmung ausbilden, wobei der Lüfter 13 bereits geförderte Kühlluft durch den Bypasskanal 18 wieder ansaugt.4 shows a further exemplary embodiment of the invention with a fan frame 10, a circular frame opening 11, which is delimited by a hollow-cylindrical frame ring 12. Within the Zargenringes 12 runs a jacket fan 13 with partially indicated fan blades 13a and a jacket 14 to. The jacket 14 forms a radial gap 15 with the frame ring 12. The jacket 14 has an end-side inlet region 14a, and the frame ring 12 has an end-side inlet region 12a, which overlap in the radial direction. Radially outside the Zargenringes 12, a control unit 16 is arranged, which is heat-conductively connected to a heat sink 17. The heat sink 17 has two plates 17a, 17b, through which a bypass channel 18 is formed, which communicates with a passage opening 19 in the fan frame 10 in flow communication. Within the bypass channel 18 heat dissipating elements 17c are arranged. At a corresponding pressure gradient, the bypass channel 18 allows a bypass flow, represented by dashed arrows N, to pass through-parallel to the main cooling air flow, represented by the arrow L. However, this bypass flow will only set if a corresponding overpressure exists within the fan cowl 10 , caused by a corresponding dynamic pressure prevails. Otherwise, d. H. with suction fan 13, the flow direction in the bypass channel 18 will reverse, and it will form a Rezirkulationsströmung, wherein the fan 13 already sucks already conveyed cooling air through the bypass channel 18 again.
Fig. 5 zeigt den Kühlkörper 17 für das Ausführungsbeispiel gemäß Fig. 4 mit Luftströmungsrichtung P bzw. P'. Auf der Grundplatte 17a sind wiederum Kühldome 17c angeordnet, welche seitlich durch Kanalwände 17d, 17e begrenzt werden. Die Kühldome 17c sind wiederum in Reihen und versetzt gegeneinander angeordnet, so dass sich eine sehr gute Kühlwirkung durch Konvektion ergibt.Fig. 5 shows the heat sink 17 for the embodiment of FIG. 4 with air flow direction P or P '. On the base plate 17a are turn Cooling dome 17c arranged, which are bounded laterally by channel walls 17d, 17e. The cooling domes 17c are in turn arranged in rows and offset from each other, so that there is a very good cooling effect by convection.
Fig. 6 zeigt ein drittes Ausführungsbeispiel der Erfindung mit einer Zarge 20, welche eine Zargenöffnung 21 aufweist, welche von einem etwa glockenförmig ausgebildeten Zargeneinlauf 22 begrenzt wird. Innerhalb der Zargenöffnung 21 ist ein Mantellüfter 23 mit einem Mantel 24 angeordnet, wobei der Mantel in Luftströmungsrichtung L gesehen stromabwärts des Zargeneinlaufes 22 angeordnet ist. Zwischen einer Hinterkante 22a des Zargeneinlaufes 20 und einer Vorderkante 24a des Mantels 24 ist ein Axialspalt 25 belassen, welcher einen Leckage- oder Nebenstrom erzeugt. Auf der Außenseite der Zarge 20 ist ein Lüftersteuergerät 26 angeordnet, welches Wärme leitend mit einer Grundplatte 27a eines Kühlkörpers 27 verbunden ist. Auf der Grundplatte 27a sind Kühldome 27b, 27c unterschiedlicher Höhe angeordnet. Die kürzeren Kühldome 27b sind radial außerhalb des Lüftermantels 24 angeordnet, während die stromabwärts (in Richtung der Pfeile L) gelegenen Kühldome 27c eine größere Höhe aufweisen und sich bis in den Haupt- Kühlluftstrom L, d. h. in den Durchmesser des Lüftermantels 24 hinein erstrecken. Die Spitzen der Kühldome 27c werden somit vom Haupt- Kühlluftstrom L umströmt und gekühlt. Die kürzeren Kühldome 27b dagegen werden von einem Nebenstrom, dargestellt durch die Pfeile N, umströmt, welcher sich infolge der Lüfterdrehung und des Axialspaltes 25 einstellt. Der Nebenstrom N ist also im Wesentlichen entgegen dem Hauptstrom L gerichtet.Fig. 6 shows a third embodiment of the invention with a frame 20, which has a Zargenöffnung 21, which is bounded by an approximately bell-shaped Zargeneinlauf 22. Within the frame opening 21, a jacket fan 23 is arranged with a jacket 24, wherein the jacket is arranged in the air flow direction L downstream of the Zargeneinlaufes 22 is arranged. Between a trailing edge 22a of the Zargeneinlaufes 20 and a front edge 24a of the shell 24, an axial gap 25 is left, which generates a leakage or secondary flow. On the outside of the frame 20, a fan control unit 26 is arranged, which is heat-conductively connected to a base plate 27 a of a heat sink 27. On the base plate 27a Kühldome 27b, 27c of different height are arranged. The shorter cooling domes 27b are arranged radially outside the fan casing 24, while the downstream (in the direction of the arrows L) cooling domes 27c have a greater height and extend into the main cooling air flow L, d. H. extend into the diameter of the fan shroud 24. The tips of the cooling domes 27c are thus flowed around and cooled by the main cooling air flow L. By contrast, the shorter cooling domes 27b are surrounded by a secondary flow, represented by the arrows N, which adjusts as a result of the fan rotation and the axial gap 25. The secondary flow N is thus directed substantially counter to the main stream L.
Durch die Kombination von radial außerhalb des Lüftermantels 24 und radial innerhalb des Manteldurchmessers sich erstreckender Kühldome 27b, 27c wird ein verstärkter Kühleffekt, d. h. eine bessere Wärmeabfuhr der Verlustleistung erreicht.Due to the combination of cooling domes 27b, 27c extending radially outside the fan casing 24 and radially inside the shell diameter, an enhanced cooling effect, i. H. achieves a better heat dissipation of the power loss.
Die Figuren 7 bis 11 zeigen den Kühlkörper 27 für das Ausführungsbeispiel gemäß Fig. 6. Fig. 7 zeigt in isometrischer Darstellung den Kühlkörper 27, wobei die unterschiedlichen Höhen der Kühldome 27b, 27c deutlich erkenn- bar sind. Die Veränderung der Höhe erfolgt sowohl in Axial- als auch in Um- fangsrichtung. Fig. 8 zeigt eine Draufsicht auf den Kühlkörper 27 mit versetzten der Anordnung der Kühldome 27b, 27c. Fig. 9 zeigt einen Querschnitt entlang der Linie IX-IX1 wobei die unterschiedlichen Höhen h1 für die kürze- ren Kühldome 27b und die Höhen h2 für die längeren Kühldome 27c eingezeichnet sind. Fig. 10, ein Längsschnitt entlang der Linie X-X, zeigt, dass die Höhe der Kühldome 27b auch in Umfangsrichtung variiert, und zwar entlang einem Kreisbogen K, welcher dem Kreisumfang des Lüftermantels 24 (vgl. Fig. 6) entspricht.FIGS. 7 to 11 show the heat sink 27 for the exemplary embodiment according to FIG. 6. FIG. 7 shows an isometric view of the heat sink 27, wherein the different heights of the cooling domes 27b, 27c are clearly recognizable. are bar. The change in height takes place both in the axial direction and in the circumferential direction. Fig. 8 shows a plan view of the heat sink 27 with staggered the arrangement of the cooling dome 27b, 27c. FIG. 9 shows a cross section along the line IX-IX 1, wherein the different heights h1 for the shorter cooling domes 27b and the heights h2 for the longer cooling domes 27c are shown. Fig. 10, a longitudinal section along the line XX, shows that the height of the cooling dome 27b also varies in the circumferential direction, along a circular arc K, which corresponds to the circumference of the fan shroud 24 (see Fig. 6).
Fig. 11 zeigt den Kühlkörper 27 in einer Ansicht, wobei wiederum die variierende, an Kreisbögen K und KO angepasste Höhe der Kühldome ersichtlich ist. FIG. 11 shows the heat sink 27 in a view, again showing the varying height of the cooling domes adapted to circular arcs K and KO.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Vorrichtung zur Förderung eines Kühlluftstromes für mindestens einen1. Device for conveying a cooling air flow for at least one
Wärmeübertrager, insbesondere für Kraftfahrzeuge, aufweisend eine Lüfterzarge (1, 10, 20) mit Zargenöffnung (2, 11, 21), ein in der Zargenöffnung umlaufendes Lüfterrad (4, 13, 23), einen Lüfterantrieb mit Lüftersteuergerät (6, 16, 26), welches im Randbereich der Zargenöff- nung (2, 11 , 21) angeordnet und mittels eines Kühlkörpers (7, 17, 27) kühlbar ist, dadurch gekennzeichnet, dass zumindest ein Teil des Kühlkörpers (7, 17, 27) radial außerhalb der Zargenöffnung (2, 11 , 21) angeordnet und von einem Nebenstrom (N) des Kühlluftstromes (L) beaufschlagbar ist.Heat exchanger, in particular for motor vehicles, comprising a fan cowl (1, 10, 20) with frame opening (2, 11, 21), a fan wheel (4, 13, 23) revolving in the frame opening, a fan drive with fan control unit (6, 16, 26 ), which in the edge region of Zargenöff- tion (2, 11, 21) arranged and cooled by a heat sink (7, 17, 27), characterized in that at least a portion of the heat sink (7, 17, 27) radially outside the Zargenöffnung (2, 11, 21) arranged and by a side stream (N) of the cooling air flow (L) can be acted upon.
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Zargenöffnung (1 1) einen vorzugsweise zylindrisch ausgebildeten Zargenring (12) aufweist.2. Apparatus according to claim 1, characterized in that the frame opening (1 1) has a preferably cylindrically shaped Zargenring (12).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Lüfterrad (4, 13, 23) einen Mantel (5, 14, 24) aufweist.3. Apparatus according to claim 1 or 2, characterized in that the fan wheel (4, 13, 23) has a jacket (5, 14, 24).
4. Vorrichtung nach Anspruch 1 und 3, dadurch gekennzeichnet, dass die Zargenöffnung (2) einen vorzugsweise glockenförmig ausgebilde- ten Lufteinlaufbereich (3) aufweist und dass in Luftströmungsrichtung4. Apparatus according to claim 1 and 3, characterized in that the Zargenöffnung (2) has a preferably bell-shaped th air inlet region (3) and that in the air flow direction
L hinter dem Einlaufbereich (3) unter Belassung eines Spalts (8) der Mantel (5) angeordnet ist.L behind the inlet region (3) while leaving a gap (8) of the jacket (5) is arranged.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Kühlkörper (7) radial außerhalb des Mantels (5) angeordnet und dass der Nebenstrom (N) im Bereich des Spaltes (8) und des Mantels (5) erzeugbar ist.5. Apparatus according to claim 4, characterized in that the cooling body (7) arranged radially outside of the jacket (5) and that the secondary flow (N) in the region of the gap (8) and the jacket (5) can be generated.
6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der Kühlkörper (7, 17, 27) Elemente zur Wärmeabfuhr, insbesondere6. Apparatus according to claim 5, characterized in that the cooling body (7, 17, 27) elements for heat dissipation, in particular
Kühlrippen oder Kühldome aufweist, welche vom Nebenstrom (N) beaufschlagbar sind.Has cooling fins or cooling domes, which are acted upon by the secondary flow (N).
7. Vorrichtung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass der Kühlkörper (17) radial außerhalb des Zargenringes (12) angeordnet und einen Bypasskanal (18) zum Kühlluftstrom (L) bildet.7. Apparatus according to claim 1, 2 or 3, characterized in that the cooling body (17) arranged radially outside of the Zargenringes (12) and a bypass channel (18) to the cooling air flow (L).
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass der Bypasskanal (18) eine in der Lüfterzarge (10) angeordnete Durch- trittsöffnung (19) für den Nebenstrom (N) aufweist.8. The device according to claim 7, characterized in that the bypass channel (18) in the fan frame (10) arranged passage opening (19) for the secondary flow (N).
9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass im Bypasskanal (18) Elemente zur Wärmeabfuhr (17c) angeordnet sind.9. Apparatus according to claim 8, characterized in that in the bypass channel (18) elements for heat dissipation (17c) are arranged.
10. Vorrichtung nach mindestens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass ein Teil (27c) des Kühlkörpers (27) radial innerhalb der Zargenöffnung (21) angeordnet und vom Kühlluftstrom (L) beaufschlagbar ist.10. The device according to at least one of claims 1 to 9, characterized in that a part (27c) of the heat sink (27) disposed radially within the frame opening (21) and the cooling air flow (L) can be acted upon.
11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass der11. The device according to claim 10, characterized in that the
Kühlkörper (27) Kühlrippen oder Kühldome (27b, 27c) aufweist, welche in Luftströmungsrichtung hinter dem Mantel (24) angeordnet sind und in den Kühlluftstrom (L) hineinragen.Cooling body (27) cooling ribs or cooling domes (27b, 27c) which are arranged in the air flow direction behind the jacket (24) and project into the cooling air flow (L).
12. Vorrichtung nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kühlrippen oder Kühldome eine variable Höhe (h) aufweisen, die an den Durchmesser des Zargenringes oder des Lüftermantels angepasst ist. 12. The device according to at least one of the preceding claims, characterized in that the cooling fins or cooling dome have a variable height (h), which is adapted to the diameter of the Zargenringes or the fan shroud.
EP06806022.7A 2005-10-20 2006-10-04 Apparatus for conveying a cooling air flow Not-in-force EP1941164B1 (en)

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US8230910B2 (en) 2012-07-31
EP1941164B1 (en) 2016-12-14
DE102005050685A1 (en) 2007-05-03
US20080264600A1 (en) 2008-10-30
WO2007045355A1 (en) 2007-04-26

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