US20080035316A1 - Cooling device for a motor vehicle - Google Patents

Cooling device for a motor vehicle Download PDF

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Publication number
US20080035316A1
US20080035316A1 US11/834,064 US83406407A US2008035316A1 US 20080035316 A1 US20080035316 A1 US 20080035316A1 US 83406407 A US83406407 A US 83406407A US 2008035316 A1 US2008035316 A1 US 2008035316A1
Authority
US
United States
Prior art keywords
cooling device
axial blower
shroud
flow
flow guidance
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.)
Abandoned
Application number
US11/834,064
Other languages
English (en)
Inventor
Uwe Blass
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
Assigned to BEHR GMBH & CO. KG reassignment BEHR GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLASS, UWE, VOLLERT, ULRICH
Publication of US20080035316A1 publication Critical patent/US20080035316A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F28F9/002—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core with fastening means for other structures
    • 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/10—Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted 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
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0091—Radiators
    • F28D2021/0094—Radiators for recooling the engine coolant

Definitions

  • the invention relates to a cooling device for a motor vehicle according to the preamble of claim 1 .
  • a cooling device for motor vehicles with an axial blower, which is engine-mounted and can be driven by the combustion engine of the motor vehicle.
  • the axial blower sucks in air through a coolant radiator, to the back side of which is attached a radiator shroud for channeling the air flow.
  • the axial blower has an axial blade attachment with an external guide ring (shell), which projects against the flow direction beyond the front edges of the blade, and extends into an engine-mounted inlet nozzle.
  • the guide ring is radially enlarged in its downstream area, and it can also additionally have a diffuser part. Because of a strong throttling, the axial blower has a semiaxial flow, which is supported, or reinforced, by the enlarged area of the guide ring and diffuser part. As a result of the incorporation of the axial blower in the vicinity of the motor, recirculation of the exiting air flow can occur in the known arrangement, i.e., a renewed aspiration through the radiator can occur that detrimentally affects the cooling capacity.
  • a cooling device for a motor vehicle that has an electrofan, i.e., a fan that is driven by an electromotor.
  • the electromotor and the axial blower are attached by braces, a shroud ring, and a radiator shroud on the radiator side.
  • the shroud ring has a cylindrical part in which the axial blower rotates, and a diffuse, flaring surface which is connected to the cylindrical part downstream of it.
  • Other data regarding the design, the dimensions, and the purpose of the diffuse flaring surface are included in the patent.
  • the problem of the present invention is to improve the blower characteristics of a cooling device of the type described in the introduction, and also to prevent the recirculation of the air flow exiting from the fan.
  • the shroud ring widens radially on the side of the outflow into a funnel-shaped flow guidance device.
  • the flow exiting from the fan which is a semiaxial or semiradial flow (flow with an axial and with a radial component)
  • a recirculation i.e., a reentry of the air flow into the radiator, is also prevented, which improves the cooling capacity.
  • the radial widening of the flow guidance device is characterized by a flare angle which is at least 55°, preferably 60° and more, with respect to the axial direction.
  • the radial expansion can occur in one step, by means of a conical surface with a flare angle, or in at least two steps, by at least two successive connected conical surfaces with increasing flare angles or in the shape of a flare or bell.
  • a relatively strong expansion occurs, which reinforces the semiradial flow in the fan further in the radial direction.
  • the flare angle ⁇ can also be designed to be variable over the circumference, if the outflow conditions behind the fan vary, for example, because of secondary units arranged on the combustion engine.
  • the flow guidance device is advantageously characterized by a maximum external diameter on the downstream end that is at least 1.1 times, preferably 1.15 times, that of the fan diameter. As a result, a maximum deflection of the outflow can be achieved in the installation space available in the vehicle.
  • the fan blades can either turn within the cylindrical area of the shroud ring, or they can have a blade overhang on the downstream side that extends into the widened area of the flow guidance device.
  • a known inlet nozzle is provided on the double shroud ring that works in cooperation with a guide ring or shell that is attached to the blade tip.
  • a guide ring or shell that is attached to the blade tip.
  • the gap flow in the annular gap is directed against the main axial flow in the fan, and it sucks air out of the outflow area.
  • the semiaxial outflow and the radial deflection of the outflow toward the exterior can be supported by a radially widening shell of the fan, i.e., by a shell which widens like a diffuser. The tendency for the flow to separate is thereby decreased.
  • the shroud ring is engine-mounted, i.e., it is fixed to the block of the combustion engine.
  • relative motions are generated between the shroud and the radiator and between the shroud ring and the shroud, respectively.
  • the relative movements are compensated by flexible or movable sealing means in the form of lips or folded bellows.
  • the axial blower is also engine-mounted, and it is driven by the combustion engine preferably via a fluid friction clutch. As a result, minimal gaps are formed between the shroud ring and the blower blade tips or the blower shell.
  • FIG. 1 shows a cooling device according to the invention with an engine-mounted axial blower, and a radiator,
  • FIG. 2 shows a modified embodiment of the axial blower according to FIG. 1 ,
  • FIG. 3 shows an additional embodiment of the cooling device with a ring fan and integrated inlet nozzle
  • FIG. 4 shows an additional embodiment of a flow guidance device with a flare angle ⁇ which is variable over the periphery.
  • FIG. 1 shows a cooling device 1 according to the invention for a motor vehicle, which has an engine block 2 on which an axial blower 3 is attached and positioned.
  • the axial blower 3 has a fan hub 3 a with axial blade attachment 3 b and a rotational axis a.
  • the fan hub 3 a is attached to a fluid friction clutch—not shown—which is driven via a belt drive system 4 . (It is also possible to use a direct drive via the crankshaft of the combustion engine.)
  • a coolant/air heat exchanger 5 hereafter called a radiator, which is braced—not shown—against the body of the motor vehicle (for example, the side rails).
  • Air represented by an arrow L
  • a shroud 6 which is designed in the shape of a bonnet, is connected to the radiator 5 , and guides the airflow exiting from the radiator 5 to the axial blower 3 .
  • the latter is surrounded by a shroud ring 7 , which is designed cylindrically on its internal side, and which is connected, in the downstream direction, to a funnel-shaped widening flow guidance device 8 .
  • the shroud ring 7 and the flow guidance device 8 are designed as a unit in the represented embodiment.
  • the shroud ring 7 Arranged on the upstream part of the shroud ring 7 is an elastic lip 7 a which lies against the shroud 6 and can slide on the latter.
  • the shroud ring 7 is attached—not shown—to the engine block 2 , while the shroud 6 is attached via an elastic fastening element 6 a to the radiator 5 .
  • the fan 3 or its blade attachment 3 b , has an external diameter D L .
  • the flow guidance device 8 on its downstream end, has an external diameter D A .
  • the two diameters D A , D L satisfy the following inequality: 1.1 ⁇ D A /D L ⁇ 1.4, particularly 1.15 ⁇ D A /D L .
  • the flow guidance device 8 has a conical surface 8 a which forms an angle ⁇ with the axial direction (rotation axis a), this angle characterizing the measure of the radial widening of the guidance flow device 8 .
  • This so-called flare angle ⁇ is chosen to be greater than 55°, preferably greater than 60°.
  • the geometry of the flow guidance device 8 is determined using the two above-mentioned dimensioning units D A /D L and the flare angle ⁇ .
  • the transition from the cylindrical area of the shroud ring 7 to the conical area 8 a is preferably rounded in form, i.e., it promotes flow.
  • the flow guidance device 8 , 8 a has the effect that the air flow—represented by a dashed flow arrow P—that exits from the fan 3 b is deflected outward in the radial direction.
  • a recirculation i.e., a return flow in the direction of the radiator inlet 5 , is also prevented.
  • FIG. 2 shows a cooling device 9 , similar to the cooling device of 1 FIG. 1 , except that it has an axial blower 10 which is modified or axially offset with a hub 10 a and an axial blade attachment 10 b .
  • the blades 10 b have a blade overhang ü in the airflow direction with respect to the cylindrical part of the frame i.e., the blades 10 b extend with their overhang ü into the radially widened conical area 8 a of the flow guidance device 8 .
  • the course of the semiaxial flow over the blades 10 b , and the outflow in the area of the flow guidance device 8 are represented by a dashed flow arrow S.
  • This variant with the blade overhang u promotes a low-loss outflow with subsequent radial deflection, and stabilizes the flow.
  • FIG. 3 shows, as an additional embodiment of the invention, a cooling device 11 in which a shroud 12 , a shroud ring 13 , and a flow guidance device 14 are formed as a single plastic injection-molded piece.
  • an inlet nozzle 15 is overmolded in the inlet area of the shroud ring 13 , as described in a similar form in the state of the art mentioned in the introduction.
  • the axial blower 16 is designed as a so-called ring fan, i.e., a shell or guide ring 17 is arranged on the circumference of the blade 16 b and is connected to the blade tips.
  • the guide ring 17 has an overhang on the inlet side that extends into the inlet nozzle 15 .
  • the guide ring 17 has a part 17 b on the outflow side which is widened conically and forms a transition to the adjoining flow guidance device 14 .
  • An annular gap 18 is thus formed between the guide ring 17 and the shroud ring 13 which develops a gap flow opposite the main flow in the fan.
  • the inlet nozzle 15 in connection with the guide ring 17 , improves the flow conditions in the blade tip area, reduces the noise level, and decreases the leakage flow.
  • the aspiration of the gap flow in the downstream area of the fan results in a greater deceleration of the main flow and a better application of the flow against the flow guidance device 14 .
  • the gap flow thus has the known effect of aspiring a boundary layer.
  • the cooling device 11 corresponds to the cooling device 1 according to FIG. 1 .
  • the injection molded part which consists of the shroud 12 , the shroud ring 13 , the flow guidance device 14 , and the inlet nozzle 15 , is connected by braces, which are not shown, to the engine block 2 . Therefore there are practically no relative movements at all between the guide ring 17 and the shroud ring 13 , so that a minimal annular gap 18 can be achieved.
  • an elastic or movable fastening of the shroud 12 to the radiator 5 is required, and it is preferably achieved using an elastic fastening element 12 a.
  • a bell- or flare-shaped form is also possible and within the scope of the invention.
  • FIG. 4 shows, as an additional embodiment of the invention, a cooling device 20 with a combustion engine 21 that has several secondary units 22 in the front-end area for example, a coolant pump and a generator that are connected by a belt drive to each other.
  • the front of the combustion engine 21 presents a relatively jagged and irregular design due to the arrangement of the secondary units 22 .
  • a driver cab 23 is arranged above the combustion engine 21 , which closes off the motor space at the top.
  • an axial blower 3 and a radiator 5 or a cooling module formed from several heat exchangers, are/is arranged.
  • a shroud 24 Arranged between the radiator 5 and the axial blower 3 is a shroud 24 with a shroud ring 25 in which the axial blower 3 turns.
  • a flow guidance device 26 Connected to the shroud ring 25 is a flow guidance device 26 which, seen over the circumference of the shroud ring 25 , has a varying flare angle ⁇ : in the drawing, for example, two different flare angles are represented, an upper flare angle ⁇ 1 of approximately 90°, and a bottom flare angle ⁇ 2 of approximately 55°.
  • the flow guidance device 26 is thus adapted to the different outflow conditions to the rear of the axial blower 3 , where the conditions result from the arrangement of the secondary elements 22 .
  • a low-resistance outflow of the cooling air is achieved as a result of this variable design of the flare angle ⁇ over the circumference.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
US11/834,064 2006-08-10 2007-08-06 Cooling device for a motor vehicle Abandoned US20080035316A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006037641.2 2006-08-10
DE102006037641.2A DE102006037641B4 (de) 2006-08-10 2006-08-10 Kühlvorrichtung eingerichtet für ein Kraftfahrzeug mit einem Kühlmittelkühler und einem Axiallüfter

Publications (1)

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US20080035316A1 true US20080035316A1 (en) 2008-02-14

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US11/834,064 Abandoned US20080035316A1 (en) 2006-08-10 2007-08-06 Cooling device for a motor vehicle

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US (1) US20080035316A1 (de)
EP (1) EP1890018A1 (de)
DE (1) DE102006037641B4 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100247351A1 (en) * 2009-03-31 2010-09-30 Kleber Andreas Axial flow fan, in particular for a motor vehicle
US8573931B2 (en) 2009-03-10 2013-11-05 Behr Gmbh & Co. Kg Cooling apparatus for a motor vehicle
USD860427S1 (en) 2017-09-18 2019-09-17 Horton, Inc. Ring fan
JP2020133457A (ja) * 2019-02-15 2020-08-31 株式会社ミツバ 送風装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2951410B1 (fr) * 2009-10-16 2012-01-06 Renault Sa Agencement d'un groupe moto ventilateur et d'un radiateur
JP2017226252A (ja) * 2016-06-20 2017-12-28 いすゞ自動車株式会社 車両の冷却装置
DE102019202116A1 (de) * 2019-02-18 2020-08-20 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Kühlerlüfter eines Kraftfahrzeugs
DE102021118148A1 (de) 2021-07-14 2023-01-19 Ebm-Papst Mulfingen Gmbh & Co. Kg Kühlvorrichtung mit zwei stirnseitigen voneinander getrennt anströmbaren Teilflächen

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US3433403A (en) * 1966-12-16 1969-03-18 Lau Blower Co Fan inlet shroud
US3937192A (en) * 1974-09-03 1976-02-10 General Motors Corporation Ejector fan shroud arrangement
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US6164909A (en) * 1997-04-03 2000-12-26 Modine Manufacturing Company Radial fan
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US20070160468A1 (en) * 2004-04-05 2007-07-12 Haruhiro Tsubota Cooling device
US7363961B2 (en) * 2003-09-10 2008-04-29 Calsonic Kansei Corporation Heat exchanger support structure of motor vehicle and supporting method

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CA1046367A (en) * 1974-05-17 1979-01-16 International Harvester Company Heat transfer system employing a coanda effect producing fan shroud exit
DE2722089C2 (de) * 1977-05-16 1986-07-24 Steyr-Daimler-Puch Ag, Wien Gekapselte, wassergekühlte Brennkraftmaschine
AT379435B (de) * 1980-08-05 1986-01-10 List Hans Axialluefter
DE3304297A1 (de) * 1982-03-15 1984-03-15 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Axialgeblaese, insbesondere fuer kuehler einer wassergekuehlten brennkraftmaschine
DE8614073U1 (de) * 1986-05-24 1988-04-07 Daimler-Benz Ag
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Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433403A (en) * 1966-12-16 1969-03-18 Lau Blower Co Fan inlet shroud
US3937192A (en) * 1974-09-03 1976-02-10 General Motors Corporation Ejector fan shroud arrangement
US4061188A (en) * 1975-01-24 1977-12-06 International Harvester Company Fan shroud structure
US4566852A (en) * 1982-03-15 1986-01-28 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co. Kg Axial fan arrangement
US5520513A (en) * 1990-03-07 1996-05-28 Nippondenso Co., Ltd. Fan apparatus
US5423660A (en) * 1993-06-17 1995-06-13 Airflow Research And Manufacturing Corporation Fan inlet with curved lip and cylindrical member forming labyrinth seal
US5599169A (en) * 1994-09-07 1997-02-04 Behr Gmbh & Co. Radial impeller for a cooling system of a motor vehicle
US6164909A (en) * 1997-04-03 2000-12-26 Modine Manufacturing Company Radial fan
US20010004011A1 (en) * 1997-10-08 2001-06-21 Honda Giken Kogyo Kabushiki Kaisha Cooling device for radiator of motorcycle
US6543523B2 (en) * 1997-10-08 2003-04-08 Honda Giken Kogyo Kabushiki Kaisha Cooling device for radiator of motorcycle
US7363961B2 (en) * 2003-09-10 2008-04-29 Calsonic Kansei Corporation Heat exchanger support structure of motor vehicle and supporting method
US20070160468A1 (en) * 2004-04-05 2007-07-12 Haruhiro Tsubota Cooling device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8573931B2 (en) 2009-03-10 2013-11-05 Behr Gmbh & Co. Kg Cooling apparatus for a motor vehicle
US20100247351A1 (en) * 2009-03-31 2010-09-30 Kleber Andreas Axial flow fan, in particular for a motor vehicle
US8459967B2 (en) * 2009-03-31 2013-06-11 Behr Gmbh & Co. Kg Axial flow fan, in particular for a motor vehicle
USD860427S1 (en) 2017-09-18 2019-09-17 Horton, Inc. Ring fan
JP2020133457A (ja) * 2019-02-15 2020-08-31 株式会社ミツバ 送風装置
JP7169219B2 (ja) 2019-02-15 2022-11-10 株式会社ミツバ 送風装置

Also Published As

Publication number Publication date
DE102006037641B4 (de) 2019-04-04
DE102006037641A1 (de) 2008-02-14
EP1890018A1 (de) 2008-02-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BEHR GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BLASS, UWE;VOLLERT, ULRICH;REEL/FRAME:019895/0493

Effective date: 20070910

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION