EP1941164B1 - Dispositif de transport d'un flux d'air de refroidissement - Google Patents

Dispositif de transport d'un flux d'air de refroidissement Download PDF

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Publication number
EP1941164B1
EP1941164B1 EP06806022.7A EP06806022A EP1941164B1 EP 1941164 B1 EP1941164 B1 EP 1941164B1 EP 06806022 A EP06806022 A EP 06806022A EP 1941164 B1 EP1941164 B1 EP 1941164B1
Authority
EP
European Patent Office
Prior art keywords
cooling
fan
air flow
frame
cover
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.)
Not-in-force
Application number
EP06806022.7A
Other languages
German (de)
English (en)
Other versions
EP1941164A1 (fr
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
Mahle 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 Mahle Behr GmbH and Co KG filed Critical Mahle Behr GmbH and Co KG
Publication of EP1941164A1 publication Critical patent/EP1941164A1/fr
Application granted granted Critical
Publication of EP1941164B1 publication Critical patent/EP1941164B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.
  • 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 outputs 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 upon by a cooling air flow.
  • heat sinks z. B. by the EP 0 278 240 A2 the applicant known.
  • 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 attached 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 jacket fan, which in the air flow direction behind the frame opening 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 flow depends on the operating condition 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 Zargenö réelle is limited by a cylindrical Zargenring in which the shell fan rotates, while radially outside 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.
  • suction operation of the fan 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. This achieves the advantage of an increased cooling effect.
  • 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 shroud 1 partially shown with a frame opening 2, which is bounded by a Zargeneinlauf 3. Inside the door opening 2 is a partially illustrated jacket fan 4 is arranged, which also has only partially illustrated 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 shown in dashed lines and denoted by N: in the case of an intake fan 4, a recirculation flow in the form of a vortex N is formed, wherein the secondary flow is 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 bypass N can then be reversed when the fan 4 at high vehicle speed, ie at a correspondingly high dynamic pressure "over-blown".
  • the fan 4 then no longer supplies the air flow with energy and acts as a resistor. In this case, the back pressure will "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. 3a show a modified heat sink 7 'with variable height of thededome 7'b, which varies between a minimum height h0 approximately in the middle and a maximum height h1 in the outdoor area.
  • the height of the cooling domes 7'b is adapted to the circular circumference of the fan casing 5, so that there is a better cooling effect.
  • Fig. 4 shows a further embodiment of the invention with a fan frame 10, a circular frame opening 11, which is bounded 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 can at a corresponding pressure gradient, a bypass flow, shown by dashed arrows N, by - parallel to the main cooling air flow, represented by the arrow L.
  • this bypass current will adjust only if within the fan frame 10, a corresponding overpressure, caused by a corresponding dynamic pressure prevails. Otherwise, ie with an intake fan 13, the flow direction in the bypass channel 18 will reverse, and it will form a recirculation flow, wherein the fan 13 sucks already conveyed cooling air through the bypass channel 18 again.
  • Fig. 5 shows the heat sink 17 for the embodiment according to 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 ventilator jacket 24, while the cooling domes 27c located downstream (in the direction of the arrows L) have a greater height and extend into the main cooling air flow L, ie into the diameter of the ventilator jacket 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 embodiment according to Fig. 6
  • Fig. 7 shows in isometric view, the heat sink 27, the different heights of the cooling dome 27b, 27c clearly visible are.
  • the change in height occurs both in the axial 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, wherein the different heights h1 for the shorterdedome 27b and the heights h2 are plotted for the longerdedome 27c.
  • 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 the circle circumference of the fan shroud 24 (see. Fig. 6 ) corresponds.
  • Fig. 11 shows the heat sink 27 in a view, in turn, the varying, adapted to circular arcs K and K0 height of the cooling dome is visible.

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

Claims (10)

  1. Dispositif servant au transport d'un flux d'air froid pour au moins un échangeur de chaleur, en particulier pour des véhicules automobiles, ledit dispositif présentant un châssis de ventilateur (1, 10, 20), comprenant une ouverture de châssis (2, 11, 21), une roue de ventilateur (4, 13, 23) tournant dans l'ouverture du châssis, une enveloppe de ventilateur (5) reliant les pales de ventilateur de la roue du ventilateur, une commande d'entraînement du ventilateur comprenant un organe de commande de ventilateur (6, 16, 26) qui est disposé dans la zone de bordure de l'ouverture (2, 11, 21) du châssis et peut être refroidi au moyen d'un refroidisseur (7, 17, 27), caractérisé en ce qu'au moins une partie du refroidisseur (7, 17, 27) est disposée à l'extérieur de l'ouverture (2, 11, 21) du châssis, dans le sens radial, et peut être sollicitée par un flux secondaire (N) du flux d'air de refroidissement (L), où l'ouverture (2) du châssis présente une zone d'entrée d'air (3) configurée de préférence en forme de cloche, et en ce que l'enveloppe (5) est disposée en laissant une fente (8) derrière la zone d'entrée d'air (3), dans la direction d'écoulement de l'air L, et le refroidisseur (7) est disposé à l'extérieur de l'enveloppe (5) dans le sens radial, et en ce que le flux secondaire (N) peut être produit dans la zone de la fente (8) et de l'enveloppe (5).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'ouverture (11) du châssis présente une virole de châssis (12) configurée de préférence de façon cylindrique.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la roue de ventilateur (4, 13, 23) présente une enveloppe (5, 14, 24).
  4. Dispositif selon la revendication 1, 2 ou 3, caractérisé en ce que le refroidisseur (7, 17, 27) présente des éléments servant à la dissipation de chaleur, présentant en particulier des ailettes de refroidissement ou des dômes de refroidissement qui peuvent être sollicités par le flux secondaire (N).
  5. Dispositif selon la revendication 1, 2, 3 ou 4, caractérisé en ce que le refroidisseur (17) est disposé à l'extérieur de la virole de châssis (12), dans le sens radial, et forme un conduit de dérivation (18) par rapport au flux d'air de refroidissement (L).
  6. Dispositif selon la revendication 5, caractérisé en ce que le conduit de dérivation (18) présente une ouverture de passage (19) prévue pour le flux secondaire (N) et disposée dans le châssis de ventilateur (10).
  7. Dispositif selon la revendication 6, caractérisé en ce que des éléments servant à la dissipation de chaleur (17c) sont disposés dans le conduit de dérivation (18).
  8. Dispositif selon au moins l'une quelconque des revendications 1 à 7, caractérisé en ce qu'une partie (27c) du refroidisseur (27) est disposée à l'intérieur de l'ouverture (21) du châssis, dans le sens radial, et peut être sollicitée par le flux d'air de refroidissement (L).
  9. Dispositif selon la revendication 8, caractérisé en ce que le refroidisseur (27) présente des ailettes de refroidissement ou des dômes de refroidissement (27b, 27c) qui sont disposés derrière l'enveloppe (24) dans la direction d'écoulement de l'air et pénètrent à l'intérieur du flux d'air de refroidissement (L).
  10. Dispositif selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les ailettes de refroidissement ou les dômes de refroidissement présentent une hauteur (h) variable qui est adaptée au diamètre de la virole du châssis ou de l'enveloppe du ventilateur.
EP06806022.7A 2005-10-20 2006-10-04 Dispositif de transport d'un flux d'air de refroidissement Not-in-force EP1941164B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005050685A DE102005050685A1 (de) 2005-10-20 2005-10-20 Vorrichtung zur Förderung eines Kühlluftstromes
PCT/EP2006/009582 WO2007045355A1 (fr) 2005-10-20 2006-10-04 Dispositif de transport d'un flux d'air de refroidissement

Publications (2)

Publication Number Publication Date
EP1941164A1 EP1941164A1 (fr) 2008-07-09
EP1941164B1 true EP1941164B1 (fr) 2016-12-14

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Family Applications (1)

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EP06806022.7A Not-in-force EP1941164B1 (fr) 2005-10-20 2006-10-04 Dispositif de transport d'un flux d'air de refroidissement

Country Status (4)

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US (1) US8230910B2 (fr)
EP (1) EP1941164B1 (fr)
DE (1) DE102005050685A1 (fr)
WO (1) WO2007045355A1 (fr)

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Publication number Publication date
DE102005050685A1 (de) 2007-05-03
US8230910B2 (en) 2012-07-31
WO2007045355A1 (fr) 2007-04-26
EP1941164A1 (fr) 2008-07-09
US20080264600A1 (en) 2008-10-30

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