WO2019145661A1 - Ventilation device and cooling module having such a ventilation device - Google Patents

Ventilation device and cooling module having such a ventilation device Download PDF

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Publication number
WO2019145661A1
WO2019145661A1 PCT/FR2019/050195 FR2019050195W WO2019145661A1 WO 2019145661 A1 WO2019145661 A1 WO 2019145661A1 FR 2019050195 W FR2019050195 W FR 2019050195W WO 2019145661 A1 WO2019145661 A1 WO 2019145661A1
Authority
WO
WIPO (PCT)
Prior art keywords
rear flange
cooling
covering
openings
cover
Prior art date
Application number
PCT/FR2019/050195
Other languages
French (fr)
Inventor
Emmanuelle Piquard
Hervé Crevel
Original Assignee
Valeo Systemes Thermiques
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 Valeo Systemes Thermiques filed Critical Valeo Systemes Thermiques
Publication of WO2019145661A1 publication Critical patent/WO2019145661A1/en

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Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • 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
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/706—Humidity separation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • F01P5/04—Pump-driving arrangements
    • F01P2005/046—Pump-driving arrangements with electrical pump drive

Definitions

  • the present invention relates to a ventilation device comprising a propeller and a drive motor of this propeller, in particular to force the circulation of air through one or more heat exchangers.
  • cooling module in particular a heat engine placed on the front face of a vehicle, this cooling module comprising such a ventilation device.
  • the automobile like many other industries, uses heat exchangers to provide the engine with optimal temperature conditions.
  • Such a radiator is typically coupled to a fan that allows to force the flow of air through the radiator to absorb the heat carried by the engine coolant.
  • the fan may be placed upstream or downstream of the radiator, upstream or downstream appreciating with reference to the direction of flow of air.
  • This fan generally comprises a nozzle, of parallelepipedal shape, having an open central part for the passage of air, this central part receiving a propeller provided with blades, said nozzle supporting a drive motor of this propeller.
  • the motor makes it possible to actuate the propeller to generate the flow of air sent towards the radiator, this motor having several speeds in order to adjust the air flow as a function of the target temperature to be attained for the fluid.
  • engine cooling This nozzle also allows the attachment of the fan to a support member, including the cooling radiator or the frame.
  • the rear flange closing the casing of the drive motor has cooling openings.
  • the present invention aims to overcome the drawbacks of the prior art and to meet the above stated constraints by providing a ventilation device, simple in design and in its operating mode, reliable and economical providing cooling, by air, improved the propeller drive motor while protecting the propeller from direct introduction of foreign bodies into the crankcase.
  • Another object of the present invention is such a ventilation device allowing, in a simple way, to limit the introduction of drops of liquid and / or particles transported by the air flow entering the motor housing.
  • the present invention also relates to a cooling module, in particular for engine block, comprising such a cooling device, so as to have increased reliability.
  • the invention relates to a ventilation device comprising a propeller and a drive motor, said drive motor comprising a motor shaft and a rear flange, said rear flange comprising a hub support of the motor shaft and cooling openings for engine cooling.
  • the rear flange consisting of a central strip or at least two arms, said central strip or said arms carrying said hub support, two cooling openings of said rear flange are separated only by said central strip, or respectively by a said arms and said support, and
  • said device comprises a protective cover of said rear flange, said protective cover comprising a covering surface of said rear flange, said covering surface being partly open and comprising one or more first covering portions, each first covering portion being placed facing a separate cooling aperture of said rear flange being configured to at least partially cover said corresponding aperture, at least one of said cooling apertures is thus at least partly covered by a first covering portion.
  • this covering surface comprises as many first covering portions as the rear flange has cooling openings so that all the cooling openings are at least partially protected by first covering portions.
  • the covering surface is advantageously open on at least a portion of the periphery of each first covering portion.
  • Each first covering portion is placed facing, or substantially facing, and at a distance from a corresponding cooling opening of the rear flange.
  • each first part is not pressed against its corresponding cooling opening but is spaced apart so as to ensure the flow of air flow between the orifices of the protective cover and the cooling openings.
  • the covering surface is placed close to the outer surface of the rear flange to limit any inadvertent introduction of liquid or foreign bodies into the motor housing.
  • the rear flange being constituted by at least two arms, a ferrule connects the free ends of said arms to mechanically strengthen said rear flange,
  • said rear flange comprising n cooling apertures
  • said covering surface comprises n first covering portions so that each cooling aperture of the rear flange is at least partly covered
  • each first covering portion covers at least 85%, and still more preferably at least 90%, of the cooling opening of the rear flange with regard to which it is placed, preferably 100%, (to calculate the recovery rate, the ratio of the surface covered by the protective cover to the corresponding open surface of the rear flange is made according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie the possible reliefs are not taken into account in the calculation of the area)
  • said rear flange has an opening ratio greater than or equal to 40%, preferably greater than or equal to 50%, preferably greater than or equal to 60%, more preferably greater than or equal to 65%, (for calculating the opening, the ratio of the open area to the total surface of the rear flange, according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie the possible reliefs are not not taken into account in the calculation of the area)
  • the percentage of coverage of the openings of the rear flange by the protective cap is greater than or equal to 85%, preferably greater than or equal to 90%, preferably greater than or equal to 95%, preferably equal to 100%, each first covering portion covers at least 85%, and still more preferably at least 90%, of the cooling opening of the rear flange with respect to which it is placed, preferably still 100% (to calculate the recovery rate, it realizes the ratio of the area covered by the protective cover on the open surface of the rear flange, according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie that the possible reliefs are not taken into account in the calculation of the surface)
  • said rear flange has an opening ratio greater than or equal to 40%, preferably greater than or equal to 50%, preferably greater than or equal to 60%, more preferably greater than or equal to 65%, (for calculating the opening, the ratio of the open area to the total surface of the rear flange, according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie the possible reliefs are not not taken into account in the calculation of the area)
  • said hub support comprising an opening
  • said covering surface also comprises a second covering part placed facing said support so as to cover at least said opening
  • said device comprising a nozzle comprising a front face and a rear face, said faces delimiting a cavity in which said helix and said drive motor are received, a part of the rear face of said nozzle delimits said protective cap.
  • the front face of said nozzle is perforated for the passage of air.
  • the protective cover being attached, it comprises a flange, or outer ring, and / or a skirt surrounding said cover surface for its assembly on the motor housing.
  • This flange, or outer ring forms an extension of the covering surface, and is located projecting from the body of the housing.
  • it has a parallelogram shape or a circular shape.
  • said protective cover comprises fastening means to said rear flange, or more generally to the motor housing comprising said rear flange, or to the body of a nozzle, the body of this nozzle delimiting an internal cavity in which said propeller is placed. and said engine.
  • This protective cover can thus be mounted on the rear face of this nozzle.
  • these securing means of the protective cover are configured to cooperate with the means of fixing the motor housing so that the assembly being fixed in position, the protective cover is locked in position relative to the rear flange.
  • the fixing means comprise clipping elements and / or lugs placed on the body of said protective cover protruding from said covering surface, each of said lugs having an orifice for the passage of the rod of a fastener. such as a screw.
  • the protective cover can be fixed by any known means such as by gluing, clipping or screwing.
  • At least one of said first covering portions comprises, over part of its periphery, a baffle for retaining a part of the liquids and / or particles possibly contained in the flow of air flowing between the orifices of the protective cover and the cooling openings of said flange back.
  • baffle means any material element such as a rim, interposed on the natural path of penetrating air flow through the orifices of the protective cover to the cooling openings of the rear flange.
  • this baffle has a height adapted to avoid forming a screen limiting the flow of air in the housing.
  • said rear flange is formed of a central strip carrying the hub support, said central strip delimiting two lateral cooling openings.
  • the central strip has an oblong shape.
  • This central strip may comprise baffles on its lateral edges delimiting the cooling openings.
  • such an embodiment of the rear flange requires less material for its manufacture and saves up to 40% of material while ensuring on the one hand a good cooling of the engine and on the other hand a protection adequate interior of the engine in conjunction with the protective hood.
  • the present invention also relates to a cooling module of a propulsion unit of a vehicle, such as an engine block or a power train of an electric vehicle, comprising a ventilation device as described above.
  • Such a cooling module of an engine block generally comprises a heat exchanger such as a cooling radiator.
  • the propeller is placed behind this cooling radiator.
  • FIG. t is a schematic and partial representation of a ventilation device according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged and partial view of the ventilation device of FIG. 1, showing the rear part of the drive motor, the protective cover having been omitted for the sake of simplicity;
  • FIG. 3 is an enlarged and partial view of the ventilation device of FIG. 1, showing the rear part of the drive motor and the protective cover superimposed on the rear flange;
  • FIG. 4 is a schematic rear perspective view of a ventilation device according to a second embodiment of the present invention.
  • FIG. 4a is a sectional view of the ventilation device of FIG. 4, showing the baffles of the rear flange;
  • FIG. 4ter is a rear view of the device without the protective cover, thus showing the rear flange of the engine;
  • FIG. 5 is a view similar to Figure 4 of a ventilation device according to a third embodiment of the present invention, the protective cover having the shape of a substantially rectangular plate of greater width than the rear flange and arranged centrally to the latter;
  • FIG. 5 - Figure sbis is a sectional view of the ventilation device of FIG. 5, showing in particular the geometry of the openings of the protective cover;
  • FIG. 5ter is a rear view showing the ventilation device of figures sbis and ster without the protective cover, the rear flange of the engine is thus particularly visible;
  • FIG. 6 is a view similar to Figure 5 of a ventilation device according to a fourth embodiment of the present invention.
  • - Figure 6bis is a view similar to the ster figure showing the rear flange of the engine of the device of Figure 6;
  • - Figure 6ter is rear view of a protective cover applicable to a rear flange as shown in Figure 6a.
  • Figures t to 3 show schematically and partially a ventilation device 10 according to a first embodiment of the present invention.
  • This ventilation device 10 comprises a propeller 11 and a motor 12 for driving this propeller 11, the air flow A created being directed from the propeller 11 to the engine 12 (suction mounting).
  • the ventilation device 10 also comprises a nozzle (not shown) comprising a perforated front face and a rear face, which delimit between them a cavity in which the propeller 11 and this drive motor 12 are arranged.
  • the propeller 11 comprises a central hub 13 and a plurality of blades 14 which extend radially from the central hub 13.
  • This helix 11 may also comprise a ferrule (not shown) connecting the free ends of the blades 14.
  • This propeller 11 is here made in one piece in a plastic material, for example, by a plastic injection method.
  • this helix 11 could also consist of initially separate elements assembled together, for example, by gluing or otherwise.
  • the drive motor 12 is attached to the rear face of the nozzle (not shown) by any fastening means.
  • This motor comprises a transmission shaft 15 that is coaxial, or substantially coaxial, with the central hub 13 of the propeller 11.
  • the hub 13 is connected to this transmission shaft 15 so that the latter drives the propeller 11 in rotation when the motor 12 is in operation.
  • the drive motor 12 comprises a fixed casing 16, which comprises a front portion and a rear portion.
  • the front part is placed on the side of the housing 16 where the transmission shaft 15 extends beyond a flange 17 before the housing, the free end of the shaft 15, thus projecting, being assembled to the hub 13 central.
  • the rear portion, opposite to the flange 17 before, along the axis 18 of rotation of the drive shaft 15, has a rear flange 19 closing the housing 16 and in particular providing a support function.
  • This rear flange 19 thus comprises two lugs 20 supporting a hub support 21 of the shaft 15, this support 21 being placed in a central portion of the rear flange 19 so as to ensure a centering of this hub.
  • This support 21 here takes the form of a solid disc defining a housing for receiving a hub of the drive shaft.
  • this disk 21 could alternatively be open.
  • the narrower portions of the flared tabs are integral with the hollow disc 21 while the wider portions of the tabs 20 are connected to a circular flange 22 forming an extension of the rear flange 19 beyond the rest of the casing 16.
  • This circular flange 22 forming an integral part of the rear flange 19 is therefore projecting from the rest of the casing 16.
  • the central portion of the rear flange 19 is thus disengaged, or open, to the maximum to allow free passage to the flow of air for cooling the engine 12.
  • This flange 22 carries ears 23-25 protruding from the body of the housing 16 for fixing the latter on the rear face of the nozzle.
  • this fastening flange 22 could be placed directly on the body of the casing 16 between the flanges 17 before and 19 rear.
  • the ears 23-25 could be replaced by any other means for fastening the drive motor 12 to the nozzle.
  • the front and rear flanges 17 of the casing comprise cooling openings for the circulation of air in the casing 16 in order to cool the various constituent elements of the motor, in particular the brushes.
  • the rear flange 19 is here completely open on either side of the two arms 20 supporting the hub support 21 so that a sufficient airflow FA enters through the rear flange 19 inside the rear flange 19. housing 16 for engine cooling.
  • the ventilation device comprises a cover 28 for protection.
  • This protective cover 28 has an overlapping surface facing the rear flange 19, which is open at the level of the solid parts of this flange so as to delimit on the one hand recessed portions 29, or orifices, of the protective cover and on the other hand, 30-33 covering parts.
  • First 30, 31 covering portions have a shape and dimensions for partially covering the openings 26, 27 of the rear flange 19 which they cover in isolation. These first covering portions 30, 31 do not completely reproduce the shape of the openings 26, 27 so that they leave small central portions 39 of the openings 26, 27 uncovered.
  • the recovery rate of the openings 26, 27 is, however, of the order of 90% so that the probability of a direct introduction of foreign bodies such as particles into the crankcase of the engine is low.
  • a second covering portion 32, 33 covers the solid disk of the rear flange 19 defining a housing for receiving a hub of the drive shaft.
  • This second covering portion here comprises a disk 32 full connected to the first portions 30, 31 covering by tabs 33, or arm.
  • This original design of the protective cover ensures a good flow of air between the outside and the inside of the casing 16 of the engine while limiting the introduction of liquid and / or foreign bodies inside of it. this.
  • This protective cover 28 also comprises a flange surrounding the covering surface, this flange having projections 34-36 forming hollow ears intended to fit on the ears 23-25 of the flange 22 forming the extension of the rear flange for fixing. of the engine casing 16.
  • the protective cover 28 includes centering means relative to the rear flange 19 to ensure proper positioning of the covering portions 30-33 relative to the openings 26, 27 of the rear flange 19.
  • each of these projections 34-36 comprises an orifice 37 allowing the passage of the rod of a fastener such as a screw.
  • the protective cover 28 also comprises fastening means on the flange 22 carrying the ears 23-25 for fixing the motor housing.
  • These fixing means are configured to cooperate with complementary fastening means provided on the flange 22 carrying the ears 23-25.
  • these fixing means are here of the screw type. Alternatively, such a fixation could be obtained by clipping.
  • FIGS 4, 4a and 4b show schematically a ventilation device 40 according to a second embodiment of the present invention.
  • the rear flange consists of a simple plate 41 (Figure 4ter) of rectangular shape, also called bar, disposed centrally to the flange, the latter being, therefore, open on the rest of its surface, that is to say say on its sides.
  • the flange thus has two lateral openings 26, 27 extending on either side of the bar 41.
  • the openings 26, 27 have a general crescent shape.
  • the lateral edges of the bar 41 are open curved outwards to define baffles 42.
  • the bar 41 is flat over its entire surface.
  • the protective cover 28 is open in its central portion to the right, or substantially to the right, of the baffles 42, the strip 41 of the rear flange (or more generally substantially to the right of the edges of the strip 41 , ie of the unopened portion of the rear flange) so that air flows for cooling the drive motor are guided in their movement from the outside to the inside of the motor housing.
  • These air flows meet during their displacement baffles 42 of the rear flange, so that it is possible to limit the introduction of drops of liquid and / or particles transported by the air flow entering the engine casing .
  • the openings of the cover 28 are here in the form of two rectangular and parallel openings to the right of the edges of the bar 41 but they have alternatively a form of any suitable type.
  • FIGS 5, 5a and 5b illustrate an alternative embodiment in which the rear flange always has a bar 41 (here flat) and two large openings 26, 27 on either side of this bar.
  • the openings 26 and 27 thus also have a general crescent shape but alternatively have a shape of any suitable type.
  • the protective cover 28 visible in FIGS. 5 and 7a has a covering portion comprising a projecting portion 44 and two generally crescent-shaped lateral portions 46, 47, on either side of the projecting portion 44.
  • the hood has the particularity of having openings extending in a longitudinal direction (front-rear), unlike the transverse openings (perpendicular to the front-rear axis) of the previous embodiments.
  • the covering surface of the protective cover opposite the rear flange is thus 100%, which allows to provide the openings substantially to the right of the openings 26, 27 of the rear flange and thus improve the flow of air.
  • Figures 6 and 6bis illustrate an alternative embodiment in which the central portion of the rear flange has been enlarged, and wherein the openings of the protective cover 28 are also in the form of two crescent-shaped slits, extending substantially to right of the edges of the rear flange.
  • the cover 28 thus has two generally crescent-shaped covering portions at the openings of the rear flange 19.
  • the openings of the protective cover 28 have here been shifted peripherally to the right of the peripheral edges of the rear flange.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

The invention relates to a ventilation device comprising a propeller and a drive motor, the drive motor having a drive shaft and a rear flange (19), the rear flange (19) having a drive-shaft hub support and cooling openings for cooling the motor. According to the invention, - the rear flange is made up of a central band or of at least two arms, the central band or the arms bearing the hub support, two cooling openings in the rear flange (19) being separated only by the central band, or by each of the arms and the support, respectively, and - the device has a protective cover (28) for the rear flange (19), the protective cover (28) comprising a surface covering the rear flange (19), the covering surface being partially open and having one or more first covering parts, each first covering part being positioned opposite a separate cooling opening in the rear flange (19) and being configured to at least partially cover the corresponding opening, at least one of the cooling openings being at least partially covered by a first covering part.

Description

Dispositif de ventilation et module de refroidissement  Ventilation device and cooling module
comportant un tel dispositif de ventilation  with such a ventilation device
ARRIERE-PIAN DR I/INVENTION  BACK PIANO DR I / INVENTION
Domaine de l’invention  Field of the invention
La présente invention concerne un dispositif de ventilation comprenant une hélice et un moteur d’entraînement de cette hélice, notamment pour forcer la circulation de l’air à travers un ou plusieurs échangeurs de chaleur.  The present invention relates to a ventilation device comprising a propeller and a drive motor of this propeller, in particular to force the circulation of air through one or more heat exchangers.
Elle concerne également un module de refroidissement, notamment d’un moteur thermique placé en face avant d’un véhicule, ce module de refroidissement comprenant un tel dispositif de ventilation.  It also relates to a cooling module, in particular a heat engine placed on the front face of a vehicle, this cooling module comprising such a ventilation device.
Arrière-plan technologique  Technological background
L’automobile, comme de nombreux autres domaines industriels, utilise des échangeurs de chaleur pour assurer au moteur thermique des conditions de fonctionnement en température optimales.  The automobile, like many other industries, uses heat exchangers to provide the engine with optimal temperature conditions.
Dans le cas d’un véhicule électrique, il est également nécessaire de refroidir les différents éléments constituant la chaîne de traction.  In the case of an electric vehicle, it is also necessary to cool the various elements constituting the power train.
Il est ainsi connu d’équiper un véhicule d’un radiateur de refroidissement qui est placé à l’avant de celui-ci.  It is thus known to equip a vehicle with a cooling radiator which is placed in front of it.
Un tel radiateur est typiquement couplé à un ventilateur qui permet de forcer la circulation d’air au travers du radiateur afin d’absorber la chaleur transportée par le fluide de refroidissement du moteur.  Such a radiator is typically coupled to a fan that allows to force the flow of air through the radiator to absorb the heat carried by the engine coolant.
Le ventilateur peut être placé en amont ou en aval du radiateur, l'amont ou l'aval s'appréciant en référence à la direction d'écoulement de l'air.  The fan may be placed upstream or downstream of the radiator, upstream or downstream appreciating with reference to the direction of flow of air.
Ce ventilateur comprend généralement une buse, de forme parallélépipédique, présentant une partie centrale ouverte pour le passage de l’air, cette partie centrale recevant une hélice pourvue de pales, ladite buse supportant un moteur d’entraînement de cette hélice.  This fan generally comprises a nozzle, of parallelepipedal shape, having an open central part for the passage of air, this central part receiving a propeller provided with blades, said nozzle supporting a drive motor of this propeller.
De manière connue, le moteur permet d’actionner l’hélice pour générer le flux d’air envoyé vers le radiateur, ce moteur présentant plusieurs vitesses afin d’ajuster le débit d’air en fonction de la température cible à atteindre pour le fluide de refroidissement du moteur. Cette buse permet aussi l'accrochage du ventilateur à un élément de support, notamment le radiateur de refroidissement ou le châssis. In a known manner, the motor makes it possible to actuate the propeller to generate the flow of air sent towards the radiator, this motor having several speeds in order to adjust the air flow as a function of the target temperature to be attained for the fluid. engine cooling. This nozzle also allows the attachment of the fan to a support member, including the cooling radiator or the frame.
Il est cependant nécessaire de refroidir le moteur d’entraînement de l’hélice qui est puissant de manière à limiter l’usure des balais, diminuer la consommation électrique et de manière plus générale, éviter un potentiel disfonctionnement d’un bloc fonctionnel du véhicule.  However, it is necessary to cool the drive motor of the propeller which is powerful so as to limit the wear of the brushes, reduce the power consumption and more generally, avoid a potential malfunction of a functional block of the vehicle.
A cet effet, le flasque arrière fermant le carter du moteur d’entraînement comporte des ouvertures de refroidissement.  For this purpose, the rear flange closing the casing of the drive motor has cooling openings.
Néanmoins, les dimensions de ces ouvertures restent limitées pour empêcher des projections intempestives de corps étrangers (gravillons, gouttes de pluie, ..) à l’intérieur du carter du moteur.  Nevertheless, the dimensions of these openings are limited to prevent unwanted projections of foreign bodies (chippings, raindrops, ..) inside the motor housing.
De tels éléments sont, en effet, susceptibles d’endommager le moteur d’entraînement.  Such elements are indeed likely to damage the drive motor.
On constate donc que le refroidissement du moteur d’entraînement est insuffisant, notamment lorsque ce dernier opère à vitesse élevée pour assurer une circulation d’air importante au niveau du radiateur de refroidissement.  It is therefore found that the cooling of the drive motor is insufficient, especially when the latter operates at high speed to ensure a significant air flow at the cooling radiator.
Il existe donc un besoin pressant pour un dispositif de ventilation, dont le design original autorise un meilleur refroidissement des éléments constitutifs du moteur d’entraînement de l’hélice.  There is therefore a pressing need for a ventilation device, whose original design allows better cooling of the components of the propeller drive motor.
Objet de l’invention  Object of the invention
La présente invention vise à pallier les inconvénients de l’art antérieur et à répondre aux contraintes ci-dessus énoncées en proposant un dispositif de ventilation, simple dans sa conception et dans son mode opératoire, fiable et économique assurant un refroidissement, par air, amélioré du moteur d’entraînement de l’hélice tout en protégeant ce dernier d’introductions directes de corps étrangers dans le carter.  The present invention aims to overcome the drawbacks of the prior art and to meet the above stated constraints by providing a ventilation device, simple in design and in its operating mode, reliable and economical providing cooling, by air, improved the propeller drive motor while protecting the propeller from direct introduction of foreign bodies into the crankcase.
Un autre objet de la présente invention est un tel dispositif de ventilation permettant, de manière simple, de limiter l’introduction de gouttes de liquide et/ou de particules transportées par le flux d’air pénétrant dans le carter du moteur.  Another object of the present invention is such a ventilation device allowing, in a simple way, to limit the introduction of drops of liquid and / or particles transported by the air flow entering the motor housing.
La présente invention vise également un module de refroidissement, notamment pour bloc moteur, comprenant un tel dispositif de refroidissement, de manière à présenter une fiabilité accrue.  The present invention also relates to a cooling module, in particular for engine block, comprising such a cooling device, so as to have increased reliability.
BREVE DESCRIPTION DR I/INVENTION A cet effet, l’invention concerne un dispositif de ventilation comprenant une hélice et un moteur d’entrainement, ledit moteur d’entrainement comportant un arbre moteur et un flasque arrière, ledit flasque arrière comportant un support de moyeu de l’arbre moteur et des ouvertures de refroidissement pour le refroidissement du moteur. BRIEF DESCRIPTION DR I / INVENTION To this end, the invention relates to a ventilation device comprising a propeller and a drive motor, said drive motor comprising a motor shaft and a rear flange, said rear flange comprising a hub support of the motor shaft and cooling openings for engine cooling.
Selon l’invention,  According to the invention,
- le flasque arrière étant constitué d’une bande centrale ou d’au moins deux bras, ladite bande centrale ou lesdits bras portant ledit support de moyeu, deux ouvertures de refroidissement dudit flasque arrière sont séparées uniquement par ladite bande centrale, ou respectivement par un desdits bras et ledit support, et  the rear flange consisting of a central strip or at least two arms, said central strip or said arms carrying said hub support, two cooling openings of said rear flange are separated only by said central strip, or respectively by a said arms and said support, and
- ledit dispositif comporte un capot de protection dudit flasque arrière, ledit capot de protection comprenant une surface de recouvrement dudit flasque arrière, ladite surface de recouvrement étant en partie ouverte et comportant une ou plusieurs premières parties couvrantes, chaque première partie couvrante étant placée en regard d’une ouverture de refroidissement distincte dudit flasque arrière en étant configurée pour recouvrir au moins partiellement ladite ouverture correspondante, au moins une desdites ouvertures de refroidissement est ainsi au moins en partie recouverte par une première partie couvrante.  said device comprises a protective cover of said rear flange, said protective cover comprising a covering surface of said rear flange, said covering surface being partly open and comprising one or more first covering portions, each first covering portion being placed facing a separate cooling aperture of said rear flange being configured to at least partially cover said corresponding aperture, at least one of said cooling apertures is thus at least partly covered by a first covering portion.
De préférence, cette surface de recouvrement comporte autant de premières parties couvrantes que le flasque arrière compte d’ouvertures de refroidissement de sorte que toutes les ouvertures de refroidissement sont au moins en partie protégées par des premières parties couvrantes. Preferably, this covering surface comprises as many first covering portions as the rear flange has cooling openings so that all the cooling openings are at least partially protected by first covering portions.
La surface de recouvrement est avantageusement ouverte sur au moins une partie du pourtour de chaque première partie couvrante.  The covering surface is advantageously open on at least a portion of the periphery of each first covering portion.
Chaque première partie couvrante est donc placée en regard, ou sensiblement en regard, et à distance d’une ouverture de refroidissement correspondante du flasque arrière. En d’autres termes, chaque première partie n’est pas plaquée contre son ouverture de refroidissement correspondante mais en est écartée de manière à assurer la circulation de flux d’air entre les orifices du capot de protection et les ouvertures de refroidissement. De manière avantageuse, la surface de recouvrement est cependant placée à proximité de la surface externe du flasque arrière pour limiter toute introduction intempestive de liquide ou de corps étrangers dans le carter de moteur. Un tel design du dispositif de ventilation autorise avantageusement un taux d’ouverture plus important du flasque arrière tout en limitant le risque d’endommagement du moteur, ce qui assure un meilleur refroidissement de ce dernier. Each first covering portion is placed facing, or substantially facing, and at a distance from a corresponding cooling opening of the rear flange. In other words, each first part is not pressed against its corresponding cooling opening but is spaced apart so as to ensure the flow of air flow between the orifices of the protective cover and the cooling openings. Advantageously, however, the covering surface is placed close to the outer surface of the rear flange to limit any inadvertent introduction of liquid or foreign bodies into the motor housing. Such a design of the ventilation device advantageously allows a higher opening rate of the rear flange while limiting the risk of damage to the engine, which ensures better cooling of the latter.
Dans différents modes de réalisation particuliers de ce dispositif de ventilation, chacun ayant ses avantages particuliers et susceptibles de nombreuses combinaisons techniques possibles:  In various particular embodiments of this ventilation device, each having its particular advantages and susceptible to many possible technical combinations:
- le flasque arrière étant constitué par au moins deux bras, une virole relie les extrémités libres desdits bras pour renforcer mécaniquement ledit flasque arrière, - The rear flange being constituted by at least two arms, a ferrule connects the free ends of said arms to mechanically strengthen said rear flange,
- ledit flasque arrière comprenant n ouvertures de refroidissement, ladite surface de recouvrement comporte n premières parties couvrantes de sorte que chaque ouverture de refroidissement du flasque arrière est au moins en partie recouverte,said rear flange comprising n cooling apertures, said covering surface comprises n first covering portions so that each cooling aperture of the rear flange is at least partly covered,
- chaque première partie couvrante recouvre au moins 85%, et encore mieux au moins 90%, de l’ouverture de refroidissement du flasque arrière en regard de laquelle elle est placée, de préférence encore 100%, (pour calculer le taux de recouvrement, on réalise le ratio de la surface couverte par le capot de protection sur la surface ouverte correspondante du flasque arrière, selon leur projection dans un plan transversal à l’arbre du moteur, cad par exemple en vue arrière du moteur, cad que les reliefs éventuels ne sont pas pris en compte dans le calcul de la surface) each first covering portion covers at least 85%, and still more preferably at least 90%, of the cooling opening of the rear flange with regard to which it is placed, preferably 100%, (to calculate the recovery rate, the ratio of the surface covered by the protective cover to the corresponding open surface of the rear flange is made according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie the possible reliefs are not taken into account in the calculation of the area)
- ledit flasque arrière présente un taux d’ouverture supérieur ou égal à 40%, de préférence supérieur ou égal à 50%, de préférence supérieur ou égal à 60%, de préférence encore supérieur ou égal à 65%, (pour calculer le taux d’ouverture, on réalisation le ratio de la surface ouverte sur la surface totale du flasque arrière, selon leur projection dans un plan transversal à l’arbre du moteur, cad par exemple en vue arrière du moteur, cad que les reliefs éventuels ne sont pas pris en compte dans le calcul de la surface)  said rear flange has an opening ratio greater than or equal to 40%, preferably greater than or equal to 50%, preferably greater than or equal to 60%, more preferably greater than or equal to 65%, (for calculating the opening, the ratio of the open area to the total surface of the rear flange, according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie the possible reliefs are not not taken into account in the calculation of the area)
- le pourcentage de couverture des ouvertures du flasque arrière par le capot de protection est supérieur ou égal à 85%, de préférence supérieur ou égal à 90%, de préférence supérieur ou égale à 95%, de préférence égal à 100%, - chaque première partie couvrante recouvre au moins 85%, et encore mieux au moins 90%, de l’ouverture de refroidissement du flasque arrière en regard de laquelle elle est placée, de préférence encore 100%, (pour calculer le taux de recouvrement, on réalise le ratio de la surface couverte par le capot de protection sur la surface ouverte du flasque arrière, selon leur projection dans un plan transversal à l’arbre du moteur, cad par exemple en vue arrière du moteur, cad que les reliefs éventuels ne sont pas pris en compte dans le calcul de la surface) the percentage of coverage of the openings of the rear flange by the protective cap is greater than or equal to 85%, preferably greater than or equal to 90%, preferably greater than or equal to 95%, preferably equal to 100%, each first covering portion covers at least 85%, and still more preferably at least 90%, of the cooling opening of the rear flange with respect to which it is placed, preferably still 100% (to calculate the recovery rate, it realizes the ratio of the area covered by the protective cover on the open surface of the rear flange, according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie that the possible reliefs are not taken into account in the calculation of the surface)
- ledit flasque arrière présente un taux d’ouverture supérieur ou égal à 40%, de préférence supérieur ou égal à 50%, de préférence supérieur ou égal à 60%, de préférence encore supérieur ou égal à 65%, (pour calculer le taux d’ouverture, on réalisation le ratio de la surface ouverte sur la surface totale du flasque arrière, selon leur projection dans un plan transversal à l’arbre du moteur, cad par exemple en vue arrière du moteur, cad que les reliefs éventuels ne sont pas pris en compte dans le calcul de la surface)  said rear flange has an opening ratio greater than or equal to 40%, preferably greater than or equal to 50%, preferably greater than or equal to 60%, more preferably greater than or equal to 65%, (for calculating the opening, the ratio of the open area to the total surface of the rear flange, according to their projection in a plane transverse to the motor shaft, ie for example in rear view of the engine, ie the possible reliefs are not not taken into account in the calculation of the area)
- ledit support de moyeu comprenant une ouverture, ladite surface de recouvrement comporte également une deuxième partie couvrante placée en regard dudit support de manière à recouvrir au moins ladite ouverture,  said hub support comprising an opening, said covering surface also comprises a second covering part placed facing said support so as to cover at least said opening,
- ledit dispositif comprenant une buse comportant une face avant et une face arrière, lesdites faces délimitant une cavité dans laquelle sont reçus ladite hélice et ledit moteur d’entraînement, une partie de la face arrière de ladite buse délimite ledit capot de protection.  said device comprising a nozzle comprising a front face and a rear face, said faces delimiting a cavity in which said helix and said drive motor are received, a part of the rear face of said nozzle delimits said protective cap.
De préférence, la face avant de ladite buse est ajourée pour le passage de l’air.  Preferably, the front face of said nozzle is perforated for the passage of air.
Alternativement, le capot de protection étant rapporté, il comporte une bride, ou couronne extérieure, et/ou une jupe entourant ladite surface de recouvrement pour son assemblage sur le carter de moteur. Alternatively, the protective cover being attached, it comprises a flange, or outer ring, and / or a skirt surrounding said cover surface for its assembly on the motor housing.
Cette bride, ou couronne extérieure, forme une extension de la surface de recouvrement, et est placée en saillie du corps du carter. De préférence, elle présente une forme de parallélogramme ou une forme circulaire.  This flange, or outer ring, forms an extension of the covering surface, and is located projecting from the body of the housing. Preferably, it has a parallelogram shape or a circular shape.
- ledit capot de protection comporte des moyens de fixation audit flasque arrière, ou plus généralement au carter du moteur comportant ledit flasque arrière, ou encore au corps d’une buse, le corps de cette buse délimitant une cavité interne dans laquelle sont placés ladite hélice et ledit moteur.  said protective cover comprises fastening means to said rear flange, or more generally to the motor housing comprising said rear flange, or to the body of a nozzle, the body of this nozzle delimiting an internal cavity in which said propeller is placed. and said engine.
Ce capot de protection peut ainsi être monté sur la face arrière de cette buse.  This protective cover can thus be mounted on the rear face of this nozzle.
De manière avantageuse, ces moyens de fixation du capot de protection sont configurés pour coopérer avec les moyens de fixation du carter du moteur de sorte que l’ensemble étant fixé en position, le capot de protection est verrouillé en position par rapport au flasque arrière. De préférence, les moyens de fixation comprennent des éléments de clipsage et/ou des oreilles placées sur le corps dudit capot de protection en formant saillie de ladite surface de recouvrement, chacune desdites oreilles comportant un orifice pour le passage de la tige d’une fixation telle qu’une vis. Advantageously, these securing means of the protective cover are configured to cooperate with the means of fixing the motor housing so that the assembly being fixed in position, the protective cover is locked in position relative to the rear flange. Preferably, the fixing means comprise clipping elements and / or lugs placed on the body of said protective cover protruding from said covering surface, each of said lugs having an orifice for the passage of the rod of a fastener. such as a screw.
De manière plus générale, le capot de protection peut être fixé par tout moyen connu tel que par collage, clipsage ou vissage.  More generally, the protective cover can be fixed by any known means such as by gluing, clipping or screwing.
- au moins une desdites premières parties couvrantes comporte sur une partie de son pourtour, une chicane pour retenir une partie des liquides et/ou particules éventuellement contenues dans le flux d’air circulant entre les orifices du capot de protection et les ouvertures de refroidissement dudit flasque arrière.  at least one of said first covering portions comprises, over part of its periphery, a baffle for retaining a part of the liquids and / or particles possibly contained in the flow of air flowing between the orifices of the protective cover and the cooling openings of said flange back.
On entend par "chicane", tout élément matériel tel qu’un rebord, interposé sur le cheminement naturel de flux d’air pénétrant par le ou les orifices du capot de protection vers les ouvertures de refroidissement du flasque arrière.  The term "baffle" means any material element such as a rim, interposed on the natural path of penetrating air flow through the orifices of the protective cover to the cooling openings of the rear flange.
Une telle chicane ayant une section transversale droite en forme de L, par exemple pour un bord replié, il est ainsi possible de retenir dans le creux défini par celle-ci des liquides. Bien entendu, cette chicane présente une hauteur adaptée pour éviter de former un écran limitant la circulation de l’air dans le carter.  Such a baffle having an L-shaped cross section, for example for a folded edge, it is thus possible to retain liquids in the hollow defined by it. Of course, this baffle has a height adapted to avoid forming a screen limiting the flow of air in the housing.
- ledit flasque arrière est formé d’une bande centrale portant le support de moyeu, ladite bande centrale délimitant deux ouvertures latérales de refroidissement. De préférence, la bande centrale à une forme oblongue.  said rear flange is formed of a central strip carrying the hub support, said central strip delimiting two lateral cooling openings. Preferably, the central strip has an oblong shape.
Cette bande centrale peut comporter des chicanes sur ses bords latéraux délimitant les ouvertures de refroidissement.  This central strip may comprise baffles on its lateral edges delimiting the cooling openings.
De manière avantageuse, un tel mode de réalisation du flasque arrière nécessite moins de matière pour sa fabrication et permet d’économiser jusqu’à 40% de matière tout en assurant d’une part un bon refroidissement du moteur et d’autre part une protection adéquate de l’intérieur du moteur en conjonction avec le capot de protection.  Advantageously, such an embodiment of the rear flange requires less material for its manufacture and saves up to 40% of material while ensuring on the one hand a good cooling of the engine and on the other hand a protection adequate interior of the engine in conjunction with the protective hood.
La présente invention concerne également un module de refroidissement d’une unité de propulsion d’un véhicule, tel qu’un bloc moteur ou une chaîne de traction d’un véhicule électrique, comprenant un dispositif de ventilation tel que décrit précédemment.  The present invention also relates to a cooling module of a propulsion unit of a vehicle, such as an engine block or a power train of an electric vehicle, comprising a ventilation device as described above.
Un tel module de refroidissement d’un bloc moteur comprend en général un échangeur thermique tel qu’un radiateur de refroidissement.  Such a cooling module of an engine block generally comprises a heat exchanger such as a cooling radiator.
A titre d’exemple, l’hélice est placée en arrière de ce radiateur de refroidissement. BREVE DESCRIPTION PRS DESSINS For example, the propeller is placed behind this cooling radiator. BRIEF DESCRIPTION PRS DRAWINGS
D’autres avantages, buts et caractéristiques particulières de la présente invention ressortiront de la description qui va suivre, faite, dans un but explicatif et nullement limitatif, en regard des dessins annexés, dans lesquels:  Other advantages, aims and particular features of the present invention will emerge from the description which follows, made for an explanatory and non-limiting purpose, with reference to the appended drawings, in which:
- la Figure t est une représentation schématique et partielle d’un dispositif de ventilation selon un premier mode de réalisation de la présente invention ;  - Figure t is a schematic and partial representation of a ventilation device according to a first embodiment of the present invention;
- la Figure 2 est une vue élargie et partielle du dispositif de ventilation de la Fig. 1, montrant la partie arrière du moteur d’entraînement, le capot de protection ayant été omis par souci de simplification ;  - Figure 2 is an enlarged and partial view of the ventilation device of FIG. 1, showing the rear part of the drive motor, the protective cover having been omitted for the sake of simplicity;
- la Figure 3 est une vue élargie et partielle du dispositif de ventilation de la Fig. 1, montrant la partie arrière du moteur d’entraînement et le capot de protection superposé au flasque arrière ;  3 is an enlarged and partial view of the ventilation device of FIG. 1, showing the rear part of the drive motor and the protective cover superimposed on the rear flange;
- la Figure 4 est une représentation schématique en perspective arrière d’un dispositif de ventilation selon un deuxième mode de réalisation de la présente invention;  - Figure 4 is a schematic rear perspective view of a ventilation device according to a second embodiment of the present invention;
- la Figure 4bis est une vue en coupe du dispositif de ventilation de la Fig. 4, montrant les chicanes du flasque arrière ;  4a is a sectional view of the ventilation device of FIG. 4, showing the baffles of the rear flange;
- la Figure 4ter est une vue arrière du dispositif sans le capot de protection, montrant ainsi le flasque arrière du moteur ;  - Figure 4ter is a rear view of the device without the protective cover, thus showing the rear flange of the engine;
- la Figure 5 est une vue analogue à la figure 4 d’un dispositif de ventilation selon un troisième mode de réalisation de la présente invention, le capot de protection ayant la forme d’une plaque sensiblement rectangulaire de largeur supérieure au flasque arrière et disposée de manière centrale par rapport à ce dernier;  - Figure 5 is a view similar to Figure 4 of a ventilation device according to a third embodiment of the present invention, the protective cover having the shape of a substantially rectangular plate of greater width than the rear flange and arranged centrally to the latter;
- la Figure sbis est une vue en coupe du dispositif de ventilation de la Fig. 5, montrant notamment la géométrie des ouvertures du capot de protection ;  - Figure sbis is a sectional view of the ventilation device of FIG. 5, showing in particular the geometry of the openings of the protective cover;
- la Figure 5ter est une vue arrière montrant le dispositif de ventilation des figures sbis et ster sans le capot de protection, le flasque arrière du moteur étant ainsi particulièrement visible ;  - Figure 5ter is a rear view showing the ventilation device of figures sbis and ster without the protective cover, the rear flange of the engine is thus particularly visible;
- la Figure 6 est une vue analogue à la figure 5 d’un dispositif de ventilation selon un quatrième mode de réalisation de la présente invention ;  - Figure 6 is a view similar to Figure 5 of a ventilation device according to a fourth embodiment of the present invention;
- la Figure 6bis est une vue analogue à la figure ster montrant le flasque arrière du moteur du dispositif de la figure 6 ; - la Figure 6ter est vue arrière d’un capot de protection applicable à un flasque arrière tel qu’illustré sur la figure 6bis. - Figure 6bis is a view similar to the ster figure showing the rear flange of the engine of the device of Figure 6; - Figure 6ter is rear view of a protective cover applicable to a rear flange as shown in Figure 6a.
DESCRIPTION DI TAII I l l DK MODE DK REALISATION DK I /INVENTION DESCRIPTION OF THE PREFERRED EMBODIMENT DK I / INVENTION
Tout d’abord, on note que les figures ne sont pas à l’échelle.  First, we note that the figures are not scaled.
Les Figures t à 3 représentent schématiquement et de manière partielle, un dispositif 10 de ventilation selon un premier mode de réalisation de la présente invention.  Figures t to 3 show schematically and partially a ventilation device 10 according to a first embodiment of the present invention.
Ce dispositif 10 de ventilation comprend une hélice 11 et un moteur 12 d’entraînement de cette hélice 11, le flux d’air A créé étant dirigé de l’hélice 11 vers le moteur 12 (montage aspirant).  This ventilation device 10 comprises a propeller 11 and a motor 12 for driving this propeller 11, the air flow A created being directed from the propeller 11 to the engine 12 (suction mounting).
Le dispositif 10 de ventilation comprend également une buse (non représentée) comportant une face avant ajourée et une face arrière, lesquelles délimitent entre elles, une cavité dans laquelle sont agencés cette hélice 11 et ce moteur d’entraînement 12.  The ventilation device 10 also comprises a nozzle (not shown) comprising a perforated front face and a rear face, which delimit between them a cavity in which the propeller 11 and this drive motor 12 are arranged.
L’hélice 11 comporte un moyeu 13 central et une pluralité de pales 14 qui s’étendent radialement depuis ce moyeu 13 central.  The propeller 11 comprises a central hub 13 and a plurality of blades 14 which extend radially from the central hub 13.
Cette hélice 11 peut également comporter une virole (non représentée) reliant les extrémités libres des pales 14.  This helix 11 may also comprise a ferrule (not shown) connecting the free ends of the blades 14.
Cette hélice 11 est ici réalisée d’une seule pièce dans une matière plastique, par exemple, par un procédé d’injection plastique. Alternativement, cette hélice 11 pourrait également être constituée d’éléments initialement distincts assemblés entre eux, par exemple, par collage ou autre.  This propeller 11 is here made in one piece in a plastic material, for example, by a plastic injection method. Alternatively, this helix 11 could also consist of initially separate elements assembled together, for example, by gluing or otherwise.
Le moteur 12 d’entraînement est fixé sur la face arrière de la buse (non représentée) par tout moyen de fixation. Ce moteur comprend un arbre 15 de transmission qui est coaxial, ou sensiblement coaxial, avec le moyeu 13 central de l’hélice 11. Le moyeu 13 est relié à cet arbre 15 de transmission de sorte que ce dernier entraîne l’hélice 11 en rotation, lorsque le moteur 12 est en fonctionnement.  The drive motor 12 is attached to the rear face of the nozzle (not shown) by any fastening means. This motor comprises a transmission shaft 15 that is coaxial, or substantially coaxial, with the central hub 13 of the propeller 11. The hub 13 is connected to this transmission shaft 15 so that the latter drives the propeller 11 in rotation when the motor 12 is in operation.
Le moteur 12 d’entrainement comprend un carter 16 fixe, lequel comporte une partie avant et une partie arrière.  The drive motor 12 comprises a fixed casing 16, which comprises a front portion and a rear portion.
La partie avant est placée du côté du carter 16 où l’arbre 15 de transmission se prolonge au-delà d’un flasque 17 avant du carter, l’extrémité libre de l’arbre 15, placée ainsi en saillie, étant assemblée au moyeu 13 central. La partie arrière, opposée au flasque 17 avant, le long de l’axe 18 de rotation de l’arbre 15 d’entrainement, comporte un flasque 19 arrière fermant le carter 16 et assurant notamment une fonction de support. The front part is placed on the side of the housing 16 where the transmission shaft 15 extends beyond a flange 17 before the housing, the free end of the shaft 15, thus projecting, being assembled to the hub 13 central. The rear portion, opposite to the flange 17 before, along the axis 18 of rotation of the drive shaft 15, has a rear flange 19 closing the housing 16 and in particular providing a support function.
Ce flasque 19 arrière comporte ainsi deux pattes 20 supportant un support 21 de moyeu de l’arbre 15, ce support 21 étant placé dans une partie centrale du flasque 19 arrière de manière à assurer un centrage de ce moyeu.  This rear flange 19 thus comprises two lugs 20 supporting a hub support 21 of the shaft 15, this support 21 being placed in a central portion of the rear flange 19 so as to ensure a centering of this hub.
Ces pattes 20, ou bras, évasées, sont placées de part et d’autre du support 21 pour porter ce dernier.  These tabs 20, or arms, flared, are placed on either side of the support 21 to carry the latter.
Ce support 21 prend ici la forme d’un disque plein définissant un logement pour recevoir un moyeu de l’arbre 15 d’entrainement. Bien entendu, ce disque 21 pourrait alternativement être ouvert.  This support 21 here takes the form of a solid disc defining a housing for receiving a hub of the drive shaft. Of course, this disk 21 could alternatively be open.
Plus précisément, les parties les plus étroites des pattes 20 évasées sont solidaires du disque 21 creux tandis que les parties les plus larges des pattes 20 sont reliées à une bride 22 circulaire formant une extension du flasque 19 arrière au-delà du reste du carter 16. Cette bride 22 circulaire faisant partie intégrante du flasque 19 arrière, est donc placée en saillie du reste du carter 16.  Specifically, the narrower portions of the flared tabs are integral with the hollow disc 21 while the wider portions of the tabs 20 are connected to a circular flange 22 forming an extension of the rear flange 19 beyond the rest of the casing 16. This circular flange 22 forming an integral part of the rear flange 19 is therefore projecting from the rest of the casing 16.
La partie centrale du flasque 19 arrière est ainsi dégagée, ou encore ouverte, au maximum pour laisser le libre passage au flux d’air destiné à refroidir le moteur 12.  The central portion of the rear flange 19 is thus disengaged, or open, to the maximum to allow free passage to the flow of air for cooling the engine 12.
Cette bride 22 porte des oreilles 23-25 formant saillie du corps du carter 16 pour la fixation de ce dernier sur la face arrière de la buse.  This flange 22 carries ears 23-25 protruding from the body of the housing 16 for fixing the latter on the rear face of the nozzle.
Alternativement cette bride 22 de fixation pourrait être placée directement sur le corps du carter 16 entre les flasques 17 avant et 19 arrière.  Alternatively this fastening flange 22 could be placed directly on the body of the casing 16 between the flanges 17 before and 19 rear.
Plus généralement, les oreilles 23-25 pourraient être remplacées par tout autre moyen de fixation du moteur 12 d’entraînement sur la buse.  More generally, the ears 23-25 could be replaced by any other means for fastening the drive motor 12 to the nozzle.
Les flasques 17 avant et 19 arrière du carter comportent des ouvertures de refroidissement pour la circulation de l’air dans le carter 16 afin de refroidir les différents éléments constitutifs du moteur, notamment des balais.  The front and rear flanges 17 of the casing comprise cooling openings for the circulation of air in the casing 16 in order to cool the various constituent elements of the motor, in particular the brushes.
De manière avantageuse, le flasque 19 arrière est ici entièrement ouvert de part et d’autre des deux bras 20 supportant le support 21 de moyeu de sorte qu’un flux d’air FA suffisant pénètre par le flasque 19 arrière à l’intérieur du carter 16 pour le refroidissement du moteur.  Advantageously, the rear flange 19 is here completely open on either side of the two arms 20 supporting the hub support 21 so that a sufficient airflow FA enters through the rear flange 19 inside the rear flange 19. housing 16 for engine cooling.
Ces deux ouvertures 26, 27 du flasque 19 arrière sont des ouvertures oblongues en forme de haricot. Afin de protéger l’intérieur du carter 16 des entrées de liquides et/ou de corps étrangers tels que des gravillons, le dispositif îo de ventilation comprend un capot 28 de protection. These two openings 26, 27 of the rear flange 19 are oblong openings in the form of beans. In order to protect the interior of the casing 16 from the entrances of liquids and / or foreign bodies such as chippings, the ventilation device comprises a cover 28 for protection.
Ce capot 28 de protection comporte une surface de recouvrement venant en vis- à-vis du flasque 19 arrière, laquelle est ouverte au niveau des parties pleines de ce flasque de sorte à délimiter d’une part des portions 29 évidées, ou orifices, du capot de protection et d’autre part, des parties 30-33 couvrantes.  This protective cover 28 has an overlapping surface facing the rear flange 19, which is open at the level of the solid parts of this flange so as to delimit on the one hand recessed portions 29, or orifices, of the protective cover and on the other hand, 30-33 covering parts.
Des premières 30, 31 parties couvrantes présentent une forme et des dimensions permettant de recouvrir partiellement les ouvertures 26, 27 du flasque 19 arrière qu’elles viennent recouvrir isolément. Ces premières parties couvrantes 30, 31 ne reproduisent pas intégralement la forme des ouvertures 26, 27 de sorte qu’elles laissent de petites portions 39 centrales des ouvertures 26, 27 non recouvertes. Le taux de recouvrement des ouvertures 26, 27 est toutefois de l’ordre de 90% de sorte que la probabilité d’une introduction directe de corps étrangers tels que des particules, dans le carter du moteur est faible.  First 30, 31 covering portions have a shape and dimensions for partially covering the openings 26, 27 of the rear flange 19 which they cover in isolation. These first covering portions 30, 31 do not completely reproduce the shape of the openings 26, 27 so that they leave small central portions 39 of the openings 26, 27 uncovered. The recovery rate of the openings 26, 27 is, however, of the order of 90% so that the probability of a direct introduction of foreign bodies such as particles into the crankcase of the engine is low.
Une deuxième partie couvrante 32, 33 vient recouvrir le disque plein du flasque arrière 19 définissant un logement pour recevoir un moyeu de l’arbre 15 d’entrainement. Cette deuxième partie couvrante comporte ici un disque 32 plein relié aux premières parties 30, 31 couvrantes par des languettes 33, ou bras.  A second covering portion 32, 33 covers the solid disk of the rear flange 19 defining a housing for receiving a hub of the drive shaft. This second covering portion here comprises a disk 32 full connected to the first portions 30, 31 covering by tabs 33, or arm.
Ce design original du capot de protection assure une bonne circulation des flux d’air entre l’extérieur et l’intérieur du carter 16 du moteur tout en limitant l’introduction de liquide et/ou de corps étrangers à l’intérieur de celui-ci.  This original design of the protective cover ensures a good flow of air between the outside and the inside of the casing 16 of the engine while limiting the introduction of liquid and / or foreign bodies inside of it. this.
Ce capot 28 de protection comprend également une bride entourant la surface de recouvrement, cette bride comportant des saillies 34-36 formant des oreilles creuses destinées à s’emboîter sur les oreilles 23-25 de la bride 22 formant extension du flasque arrière pour la fixation du carter 16 de moteur.  This protective cover 28 also comprises a flange surrounding the covering surface, this flange having projections 34-36 forming hollow ears intended to fit on the ears 23-25 of the flange 22 forming the extension of the rear flange for fixing. of the engine casing 16.
On s’assure ainsi avantageusement du bon positionnement du capot 28 de protection par rapport au flasque 19 arrière de sorte que les parties 30-33 couvrantes sont réglées en position et bien placées en regard de toutes les ouvertures 26, 27 du flasque 19 arrière.  This ensures advantageously the proper positioning of the cover 28 of protection relative to the rear flange 19 so that the covering portions 30-33 are adjusted in position and well placed in relation to all the openings 26, 27 of the rear flange 19.
De manière plus générale, le capot 28 de protection comporte des moyens de centrage par rapport au flasque 19 arrière pour assurer un bon positionnement des parties couvrantes 30-33 par rapport aux ouvertures 26, 27 du flasque 19 arrière. En outre, chacune de ces saillies 34-36 comporte un orifice 37 permettant le passage de la tige d’une fixation telle qu’une vis. More generally, the protective cover 28 includes centering means relative to the rear flange 19 to ensure proper positioning of the covering portions 30-33 relative to the openings 26, 27 of the rear flange 19. In addition, each of these projections 34-36 comprises an orifice 37 allowing the passage of the rod of a fastener such as a screw.
Les orifices des saillies 34-36 venant en regard des orifices des oreilles 23-25 correspondantes de la bride 22, le passage de la tige d’une fixation au travers de chaque orifice 37 et de l’orifice de l’oreille 23-25 correspondante de la bride 22, permet de verrouiller en position le capot 28 de protection par rapport au flasque 19 arrière lors de la fixation du carter de moteur sur le corps de la buse. La protection du moteur est ainsi avantageusement assurée dans le temps.  The orifices of the projections 34-36 coming opposite the orifices of the corresponding ears 23-25 of the flange 22, the passage of the rod of a fastener through each orifice 37 and the orifice of the ear 23-25 corresponding flange 22, locks in position the protective cover 28 relative to the rear flange 19 when fixing the motor housing on the body of the nozzle. The protection of the motor is thus advantageously ensured over time.
Le capot 28 de protection comprend aussi des moyens de fixation sur la bride 22 portant les oreilles 23-25 pour la fixation du carter de moteur. Ces moyens de fixation sont configurés pour coopérer avec des moyens de fixation complémentaires prévus sur la bride 22 portant les oreilles 23-25. A titre d’exemple, ces moyens de fixation sont ici du type par vissage. Alternativement, une telle fixation pourrait être obtenue par clipsage.  The protective cover 28 also comprises fastening means on the flange 22 carrying the ears 23-25 for fixing the motor housing. These fixing means are configured to cooperate with complementary fastening means provided on the flange 22 carrying the ears 23-25. By way of example, these fixing means are here of the screw type. Alternatively, such a fixation could be obtained by clipping.
Les Figures 4, 4bis et 4ter représentent schématiquement un dispositif 40 de ventilation selon un second mode de réalisation de la présente invention.  Figures 4, 4a and 4b show schematically a ventilation device 40 according to a second embodiment of the present invention.
Le flasque arrière est constituée d’une simple plaque 41 (figure 4ter) de forme rectangulaire, encore appelée barrette, disposée de manière centrale au flasque, ce dernier étant, par conséquent, ouvert sur le reste de sa surface, c’est-à-dire sur ses côtés. Le flasque présente ainsi deux ouvertures latérales 26, 27 s’étendant de part et d’autre de la barrette 41. Les ouvertures 26, 27 ont une forme générale de croissant.  The rear flange consists of a simple plate 41 (Figure 4ter) of rectangular shape, also called bar, disposed centrally to the flange, the latter being, therefore, open on the rest of its surface, that is to say say on its sides. The flange thus has two lateral openings 26, 27 extending on either side of the bar 41. The openings 26, 27 have a general crescent shape.
Les bords latéraux de la barrette 41 sont en ouvre recourbés vers l’extérieur pour définir des chicanes 42. En variante, la barrette 41 est plate sur l’ensemble de sa surface.  The lateral edges of the bar 41 are open curved outwards to define baffles 42. In a variant, the bar 41 is flat over its entire surface.
Comme illustré sur les figure 4 et 4ter, le capot 28 de protection est ouvert dans sa partie centrale au droit, ou sensiblement au droit, des chicanes 42 la barrette 41 du flasque arrière (ou plus généralement sensiblement au droit des bords de la barrette 41, i.e. de la partie non ouvertes du flasque arrière) de sorte que les flux d’air destinés à refroidir le moteur d’entraînement sont guidés dans leur déplacement de l’extérieur vers l’intérieur du carter du moteur. Ces flux d’air rencontrent lors de leur déplacement les chicanes 42 du flasque arrière, de sorte qu’il est possible limiter l’introduction de gouttes de liquide et/ou de particules transportées par le flux d’air pénétrant dans le carter du moteur. Les ouvertures du capot 28 sont ici sous la forme de deux ouvertures rectangulaires et parallèles au droit des bords de la barrette 41 mais elles ont en variante une forme de tout type adapté. As illustrated in FIGS. 4 and 4ter, the protective cover 28 is open in its central portion to the right, or substantially to the right, of the baffles 42, the strip 41 of the rear flange (or more generally substantially to the right of the edges of the strip 41 , ie of the unopened portion of the rear flange) so that air flows for cooling the drive motor are guided in their movement from the outside to the inside of the motor housing. These air flows meet during their displacement baffles 42 of the rear flange, so that it is possible to limit the introduction of drops of liquid and / or particles transported by the air flow entering the engine casing . The openings of the cover 28 are here in the form of two rectangular and parallel openings to the right of the edges of the bar 41 but they have alternatively a form of any suitable type.
Les figures 5, sbis et 5ter illustrent une variante de réalisation dans laquelle le flasque arrière présente toujours une barrette 41 (ici plate) et deux grandes ouvertures 26, 27 de part et d’autre de cette barrette. Les ouvertures 26 et 27 ont ainsi également une forme générale de croissant mais ont en variante une forme de tout type adapté.  Figures 5, 5a and 5b illustrate an alternative embodiment in which the rear flange always has a bar 41 (here flat) and two large openings 26, 27 on either side of this bar. The openings 26 and 27 thus also have a general crescent shape but alternatively have a shape of any suitable type.
Le capot de protection 28 visible sur les figures 5 et sbis présente une partie couvrante comprenant une partie saillante 44 et deux parties latérales 46, 47 en forme générale de croissant, de part et d’autre de la partie saillante 44.  The protective cover 28 visible in FIGS. 5 and 7a has a covering portion comprising a projecting portion 44 and two generally crescent-shaped lateral portions 46, 47, on either side of the projecting portion 44.
Le capot présente la particularité de présenter des ouvertures s’étendant dans une direction longitudinale (avant-arrière), contrairement aux ouvertures transversales (perpendiculaires à l’axe avant-arrière) des modes de réalisation précédents.  The hood has the particularity of having openings extending in a longitudinal direction (front-rear), unlike the transverse openings (perpendicular to the front-rear axis) of the previous embodiments.
La surface couvrante du capot de protection en regard du flasque arrière est ainsi de 100%, ce qui permet de prévoir les ouvertures sensiblement au droit des ouvertures 26, 27 du flasque arrière et améliorer ainsi la circulation de l’air.  The covering surface of the protective cover opposite the rear flange is thus 100%, which allows to provide the openings substantially to the right of the openings 26, 27 of the rear flange and thus improve the flow of air.
Les figures 6 et 6bis illustrent une variante de réalisation dans laquelle la partie centrale du flasque arrière a été agrandie, et dans laquelle les ouvertures du capot de protection 28 sont également sous la forme de deux fentes en forme de croissant, s’étendant sensiblement au droit des bords du flasque arrière.  Figures 6 and 6bis illustrate an alternative embodiment in which the central portion of the rear flange has been enlarged, and wherein the openings of the protective cover 28 are also in the form of two crescent-shaped slits, extending substantially to right of the edges of the rear flange.
Le capot 28 présente ainsi deux parties couvrantes en forme générale de croissant au droit des ouvertures du flasque arrière 19.  The cover 28 thus has two generally crescent-shaped covering portions at the openings of the rear flange 19.
Une dernière variante de capot de protection 28, applicable au flasque de la figure 6bis, est illustré en figure 6ter.  A last variant of the protective cover 28, applicable to the flange of Figure 6a, is illustrated in Figure 6ter.
Les ouvertures du capot de protection 28 ont ici été décalées en périphérie, au droit des bords périphériques du flasque arrière.  The openings of the protective cover 28 have here been shifted peripherally to the right of the peripheral edges of the rear flange.

Claims

REVENDICATIONS
1. Dispositif de ventilation comprenant une hélice (11) et un moteur (12) d’entrainement, ledit moteur (12) d’entrainement comportant un arbre (15) moteur et un flasque (19) arrière, ledit flasque (19) arrière comportant un support de moyeu de l’arbre (15) moteur et des ouvertures de refroidissement pour le refroidissement du moteur, caractérisé en ce que 1. Ventilation device comprising a propeller (11) and a drive motor (12), said drive motor (12) comprising a motor shaft (15) and a rear flange (19), said rear flange (19). comprising a hub support of the motor shaft (15) and cooling openings for cooling the motor, characterized in that
- le flasque arrière étant constitué d’une bande centrale ou d’au moins deux bras, ladite bande centrale ou lesdits bras portant ledit support de moyeu, deux ouvertures de refroidissement dudit flasque (19) arrière sont séparées uniquement par ladite bande centrale, ou respectivement par un desdits bras et ledit support, et en ce que the rear flange consisting of a central strip or at least two arms, said central strip or said arms carrying said hub support, two cooling openings of said rear flange (19) are separated only by said central strip, or respectively by one of said arms and said support, and in that
- ledit dispositif comporte un capot (28) de protection dudit flasque (19) arrière, ledit capot (28) de protection comprenant une surface de recouvrement dudit flasque (19) arrière, ladite surface de recouvrement étant en partie ouverte et comportant une ou plusieurs premières parties couvrantes, chaque première partie couvrante étant placée en regard d’une ouverture de refroidissement distincte dudit flasque (19) arrière en étant configurée pour recouvrir au moins partiellement ladite ouverture correspondante, au moins une desdites ouvertures de refroidissement est ainsi au moins en partie recouverte par une première partie couvrante. said device comprises a cover (28) for protecting said rear flange (19), said cover (28) for protection comprising an overlapping surface of said rear flange (19), said covering surface being partly open and comprising one or more first covering portions, each first covering portion being placed facing a cooling aperture distinct from said rear flange (19) being configured to at least partially cover said corresponding aperture, at least one of said cooling apertures is thus at least partly covered by a first covering part.
2. Dispositif selon la revendication 1, caractérisé en ce que le flasque arrière étant constitué par au moins deux bras, une virole relie les extrémités libres desdits bras pour renforcer mécaniquement ledit flasque arrière.  2. Device according to claim 1, characterized in that the rear flange being constituted by at least two arms, a ferrule connects the free ends of said arms to mechanically reinforce said rear flange.
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que ledit flasque (19) arrière comprenant n ouvertures de refroidissement, ladite surface de recouvrement comporte n premières parties couvrantes de sorte que chaque ouverture de refroidissement du flasque (19) arrière est au moins en partie recouverte.  3. Device according to claim 1 or 2, characterized in that said rear flange (19) comprising n cooling openings, said covering surface comprises n first covering portions so that each cooling opening of the rear flange (19) is at less partly covered.
4. Dispositif l’une quelconque des revendications précédentes, caractérisé en ce que chaque première partie couvrante recouvre au moins 85% de l’ouverture de refroidissement du flasque arrière en regard de laquelle elle est placée.  4. Device according to any one of the preceding claims, characterized in that each first covering portion covers at least 85% of the cooling opening of the rear flange opposite which it is placed.
5. Dispositif selon l’une quelconque des revendications précédentes, caractérisé en ce que ledit support de moyeu comprenant une ouverture, ladite surface de recouvrement comporte également une deuxième (32, 33) partie couvrante placée en regard dudit support de moyeu de manière à recouvrir au moins en partie ladite ouverture. 5. Device according to any one of the preceding claims, characterized in that said hub support comprising an opening, said covering surface also comprises a second (32, 33) covering part placed in view of said hub support so as to cover at least part of said opening.
6. Dispositif selon l’une quelconque des revendications précédentes, caractérisé en ce que ledit capot (28) de protection étant rapporté, il comporte une couronne extérieure et/ou une jupe formant une extension de ladite surface de recouvrement pour son assemblage sur le carter de moteur.  6. Device according to any one of the preceding claims, characterized in that said cover (28) of protection being attached, it comprises an outer ring and / or a skirt forming an extension of said cover surface for its assembly on the housing engine.
7. Dispositif selon l’une quelconque des revendications précédentes, caractérisé en ce que ledit flasque (19) arrière présente un taux d’ouverture supérieur ou égal à 40%, de préférence supérieur ou égal à 50%, de préférence supérieur ou égal à 60%, de préférence encore supérieur ou égal à 65%. un taux d’ouverture  7. Device according to any one of the preceding claims, characterized in that said rear flange (19) has an opening ratio greater than or equal to 40%, preferably greater than or equal to 50%, preferably greater than or equal to 60%, more preferably greater than or equal to 65%. an opening rate
8. Dispositif selon l’une quelconque des revendications précédentes, caractérisé en ce que au moins une desdites premières parties couvrantes comporte sur une partie de son pourtour, une chicane pour retenir une partie des liquides et/ou particules éventuellement contenus dans le flux d’air circulant entre les orifices du capot (28) de protection et les ouvertures de refroidissement dudit flasque (19) arrière.  8. Device according to any one of the preceding claims, characterized in that at least one of said first covering portions comprises on a portion of its periphery, a baffle for retaining a part of the liquids and / or particles possibly contained in the flow of air flowing between the openings of the protective cover (28) and the cooling openings of said rear flange (19).
9. Module de refroidissement d’une unité de propulsion d’un véhicule, tel qu’un bloc moteur ou une ou plusieurs batteries, comprenant un dispositif de ventilation selon l’une quelconque des revendications précédentes.  9. Cooling module of a propulsion unit of a vehicle, such as an engine block or one or more batteries, comprising a ventilation device according to any one of the preceding claims.
PCT/FR2019/050195 2018-01-29 2019-01-29 Ventilation device and cooling module having such a ventilation device WO2019145661A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1850714 2018-01-29
FR1850714A FR3077326B1 (en) 2018-01-29 2018-01-29 VENTILATION DEVICE AND COOLING MODULE INCLUDING SUCH A VENTILATION DEVICE

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210833A (en) * 1976-12-13 1980-07-01 Societe Anonyme Francaise Du Ferodo Motor-fan unit with cooled motor
JPH08340654A (en) * 1995-06-13 1996-12-24 Asmo Co Ltd Cooling structure of motor for automobile
EP0921318A2 (en) * 1997-11-25 1999-06-09 Siemens Canada Limited Fan assembly having motor cooling enhancement
US6342741B1 (en) * 1999-05-21 2002-01-29 Mitsuba Corporation Cooling structure of fan motor
US20110253078A1 (en) * 2010-04-14 2011-10-20 Rui Feng Qin Engine cooling system and cooling fan module
WO2011138658A2 (en) * 2010-05-07 2011-11-10 Robert Bosch Gmbh Motor ring and splash shield arrangement for a fan assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210833A (en) * 1976-12-13 1980-07-01 Societe Anonyme Francaise Du Ferodo Motor-fan unit with cooled motor
JPH08340654A (en) * 1995-06-13 1996-12-24 Asmo Co Ltd Cooling structure of motor for automobile
EP0921318A2 (en) * 1997-11-25 1999-06-09 Siemens Canada Limited Fan assembly having motor cooling enhancement
US6342741B1 (en) * 1999-05-21 2002-01-29 Mitsuba Corporation Cooling structure of fan motor
US20110253078A1 (en) * 2010-04-14 2011-10-20 Rui Feng Qin Engine cooling system and cooling fan module
WO2011138658A2 (en) * 2010-05-07 2011-11-10 Robert Bosch Gmbh Motor ring and splash shield arrangement for a fan assembly

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FR3077326B1 (en) 2021-12-10

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