EP2894351A1 - Standalone cold plate for cooling the electronic components of an electric fan - Google Patents

Standalone cold plate for cooling the electronic components of an electric fan Download PDF

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Publication number
EP2894351A1
EP2894351A1 EP15150493.3A EP15150493A EP2894351A1 EP 2894351 A1 EP2894351 A1 EP 2894351A1 EP 15150493 A EP15150493 A EP 15150493A EP 2894351 A1 EP2894351 A1 EP 2894351A1
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EP
European Patent Office
Prior art keywords
air
cooling
fan
cooling duct
fan according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15150493.3A
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German (de)
French (fr)
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EP2894351B1 (en
Inventor
Fabien Del Rio
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Safran Ventilation Systems SAS
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Technofan SA
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Publication of EP2894351A1 publication Critical patent/EP2894351A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/068—Mechanical details of the pump control unit
    • 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
    • F04D29/5813—Cooling the control unit

Definitions

  • fans are powered by the electrical network of the aircraft.
  • the fan is equipped with an electrical control circuit which, by its operation, produces heat.
  • the document US 2012/0236498 discloses a fan comprising cooling means of the electrical circuit formed by a quill opening into the air duct of the fan and adapted to take a secondary cooling flow which circulates between the electronic components of the circuit to ensure their cooling.
  • This arrangement even if it does not reduce the ventilation efficiency of the fan by the presence of a radiator in the air stream, is of limited efficiency, the speed of the cooling flow around the components being low and the arrangement can lead to the transmission of pollutants to the components from the air duct of the fan.
  • the object of the invention is to propose a fan, in particular for an aircraft, in which the cooling of the electric control circuit is effective, without reducing the ventilation efficiency of the fan.
  • the fan 10 illustrated on the figure 1 is a fan for an airplane or a helicopter. It is adapted to be installed on an air conditioning circuit for the cabin to ensure the setting in motion of a flow of air. Its flow rate is between 50 ls -1 and 1500 ls -1 , and in particular between 100 ls -1 and 750 ls -1 , for example 470 ls -1
  • It comprises an outer shell 12 delimiting an air stream 14, flowing from an inlet 16 of the fan to an outlet 18.
  • the shell 12 has an inner surface 20 defining the air stream.
  • This surface is cylindrical of circular section of general axis X-X forming the fan axis.
  • a motor 22 is provided along the X-X axis. This motor is carried by support arms 24 connecting the stator of the motor to the shell 12.
  • a wheel 26 provided with blades 28 is mounted on the rotor of the motor on the side of the air inlet 16.
  • An ogive 29 extends the motor 22 opposite the wheel 26.
  • a ring of fins 30 forming an air straightener extends around the motor 22 downstream of the blades 28 of the wheel.
  • the air stream 24 produced by the rotation of the wheel 26 flows between the inner surface 20 of the ferrule and the outer surface of the motor 22 and the ogive 29.
  • the fan finally comprises a circuit 40 for controlling and supplying the motor 22.
  • This circuit is connected to the power supply network 42 of the aircraft at the input and to the motor 22 at the output.
  • the circuit 40 comprises a set of electronic components such as coils 44 carried by cores 46 extending radially to the outer surface of the ferrule 12.
  • the components are fixed on the outer surface of the ferrule 12 in thermal contact with the ferrule 12. this.
  • the shell 12 comprises a generally cylindrical pipe 47 and a support base 48 of the circuit 40.
  • the tubing 47 has an oblong slot extending along a length of the tubing corresponding substantially to the right of the motor 22.
  • the base 48 is received in this slot and is sealed therein for the air stream.
  • the surfaces of the tubing 47 and the base 48 turned towards the engine and both cylindrical of the same curvatures are flush with each other.
  • the base 48 projects radially outwardly from the tubing 47.
  • the base 48 is shown alone on the figure 2 .
  • Cooling passages of the components are provided through the shell 12 and in particular the base 48 in the embodiment considered.
  • These passages comprise continuous conduits 50 flowing in the thickness of the ferrule. They are generally parallel to the X-X axis and open into the air stream from an inlet tapping 52 and one or more air reintroduction taps 54, 56.
  • the inlet tapping 52 is disposed upstream of the outlet tapping 54, 56 by considering the direction of flow of the air stream.
  • the ducts 50 comprise a main section 60 extending longitudinally. This section is rectilinear and extends beyond the extreme taps 52 and 56. This section is closed at each end by plugs 61 formed for example of polymer pad force-fitted.
  • connections 52, 54, 56 are formed by radial bores 62, 64, 66 opening in the main section 60 and in the air stream through the inner surface of the shell 12 by the corresponding stitching.
  • the radial bores 62, 64, 68 which connect the main section 60 to the inner surface of the shell 12 are made at positions depending on the position of the motor 22 and the wheel 26. This makes it possible to use the same blank of base in fans of different structure by piercing the connections appropriately. Thus, the same part can be used in several types of fan, by positioning the radial holes at the right of the desired inlet and outlet connections.
  • the outer shell, and in particular the base is formed by extrusion in a die, the straight sections 50 being formed by removable inserts ensuring a reservation in the shell during its extrusion .
  • the average diameter of each duct is greater than 4 mm. It is preferably between 4 and 8 mm and advantageously substantially equal to 6 mm.
  • the conduits 50 are dimensioned so that the speed in the ducts is greater than 10 ms -1 , and preferably greater than 30 ms -1 .
  • the dimensioning is such that less than 5% of the total flow of the fan flows through the cooling ducts 50. Ideally, a flow rate of about 2% of the total flow circulates through the cooling ducts 50.
  • the number of ducts is equal to 7. It is preferably between 2 and 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne un ventilateur (10) comportant : - une virole externe (12) dont la surface interne (20) délimite une veine d'air (14), - une roue (26) munie de pâles (28) montée rotative dans la virole (12) pour la mise en mouvement de la veine d'air, - un moteur (22) d'entrainement de la roue (26), - un circuit électrique (40) comportant des composants (44) pour la commande et l'alimentation du moteur (22), lequel circuit (40) comporte des moyens de refroidissement des composants (44) par circulation d'air prélevé dans la veine d'air (14), caractérisé en ce que : lesdits moyens de refroidissement comportent un piquage aval (52) d'entrée d'air et un piquage amont (54, 56) de réintroduction d'air formé au travers de la surface interne (20) de la virole (12), et au moins un conduit de refroidissement continu (50) reliant les piquages amont (52) et aval (54, 56) isolant les composants (44) du circuit électrique de l'air circulent dans le conduit de refroidissement (50). The present invention relates to a fan (10) comprising: an outer shell (12) whose inner surface (20) delimits an air stream (14), - a wheel (26) provided with blades (28) rotatably mounted in the shell (12) for the setting in motion of the air stream, a motor (22) for driving the wheel (26), - an electrical circuit (40) comprising components (44) for controlling and supplying the motor (22), which circuit (40) comprises means for cooling the components (44) by circulation of air taken from the vein air (14), characterized in that said cooling means comprise a downstream intake (52) of air inlet and an upstream intake (54, 56) of reintroduction of air formed through the inner surface (20) of the ferrule (12), and at least one continuous cooling duct (50) connecting the upstream (52) and downstream (54, 56) connections insulating the components (44) of the electrical circuit of the air circulates in the cooling duct (50).   

Description

La présente invention concerne un ventilateur du type comportant :

  • une virole externe dont la surface interne délimite une veine d'air,
  • une roue munie de pâles montée rotative dans la virole pour la mise en mouvement de la veine d'air,
  • un moteur d'entrainement de la roue, et
  • un circuit électrique comportant des composants pour la commande et l'alimentation du moteur, lequel circuit comporte des moyens de refroidissement des composants par circulation d'air prélevé dans la veine d'air.
The present invention relates to a fan of the type comprising:
  • an outer shell whose inner surface delimits a stream of air,
  • a wheel provided with blades mounted rotatably in the shell for the movement of the air stream,
  • a drive motor of the wheel, and
  • an electrical circuit comprising components for controlling and supplying the motor, which circuit comprises means for cooling the components by circulating air taken from the air stream.

De nombreux ventilateurs sont utilisés dans les avions pour assurer la climatisation de la cabine de l'appareil, ou encore assurer le refroidissement d'équipements de l'appareil.Many fans are used in aircraft to provide air conditioning in the cabin of the aircraft, or to ensure the cooling of equipment of the aircraft.

Ces ventilateurs sont alimentés par le réseau électrique de l'avion. Pour assurer la commande et l'alimentation du moteur du ventilateur, le ventilateur est équipé d'un circuit électrique de commande qui, par son fonctionnement, produit de la chaleur.These fans are powered by the electrical network of the aircraft. To provide control and power to the fan motor, the fan is equipped with an electrical control circuit which, by its operation, produces heat.

Pour évacuer la chaleur, il est connu de disposer les composants électroniques du circuit électrique sur un radiateur qui fait saillie à l'intérieur de la veine d'air délimitée par la virole externe du ventilateur. Un tel agencement dégrade les performances aérauliques du ventilateur.To evacuate the heat, it is known to dispose the electronic components of the electrical circuit on a radiator which protrudes inside the air duct delimited by the outer shell of the fan. Such an arrangement degrades the aeraulic performance of the fan.

Le document US 2012/0236498 décrit un ventilateur comprenant des moyens de refroidissement du circuit électrique formés par un piquage débouchant dans la veine d'air du ventilateur et propre à prélever un flux secondaire de refroidissement qui circule entre les composants électroniques du circuit pour assurer leur refroidissement.The document US 2012/0236498 discloses a fan comprising cooling means of the electrical circuit formed by a quill opening into the air duct of the fan and adapted to take a secondary cooling flow which circulates between the electronic components of the circuit to ensure their cooling.

Cet agencement, même s'il permet de ne pas réduire le rendement aéraulique du ventilateur par la présence d'un radiateur dans la veine d'air, est d'une efficacité limitée, la vitesse du flux de refroidissement autour des composants étant faible et l'agencement pouvant conduire à la transmission d'éléments polluants vers les composants en provenance de la veine d'air du ventilateur.This arrangement, even if it does not reduce the ventilation efficiency of the fan by the presence of a radiator in the air stream, is of limited efficiency, the speed of the cooling flow around the components being low and the arrangement can lead to the transmission of pollutants to the components from the air duct of the fan.

L'invention a pour but de proposer un ventilateur, notamment pour aéronef, dans lequel le refroidissement du circuit électrique de commande est efficace, sans réduire le rendement aéraulique du ventilateur.The object of the invention is to propose a fan, in particular for an aircraft, in which the cooling of the electric control circuit is effective, without reducing the ventilation efficiency of the fan.

A cet effet, l'invention a pour objet un ventilateur du type précité, caractérisé en ce que :

  • lesdits moyens de refroidissement comportent un piquage aval d'entrée d'air et un piquage amont de réintroduction d'air formé au travers de la surface interne de la virole, et
  • au moins un conduit de refroidissement continu reliant les piquages amont et aval isolant les composants du circuit électrique de l'air circulent dans le conduit de refroidissement.
For this purpose, the subject of the invention is a fan of the aforementioned type, characterized in that:
  • said cooling means comprise a downstream intake of air intake and an upstream intake of reintroduction of air formed through the inner surface of the ferrule, and
  • at least one continuous cooling duct connecting the upstream and downstream connections insulating the components of the electrical circuit of the air circulates in the cooling duct.

Selon des modes particuliers de réalisation, le ventilateur comporte une ou plusieurs des caractéristiques suivantes :

  • le ou chaque conduit de refroidissement s'étend dans l'épaisseur de la virole externe et les composants de circuit électronique sont en contact thermique avec la surface externe de la virole ;
  • la virole est généralement cylindrique et les conduits de refroidissement s'étendent généralement suivant une génératrice de la virole ;
  • chaque conduit de refroidissement comporte un tronçon principal s'étendant longitudinalement dans l'épaisseur de la virole du piquage amont au piquage aval, ce tronçon principal étant tamponné à chaque extrémité, et en ce que le conduit de refroidissement comporte deux perçages généralement radicaux reliant le piquage amont et le piquage aval du tronçon principal ;
  • le diamètre courant du ou de chaque conduit de refroidissement est compris entre 4 et 8 mm ;
  • le ou chaque conduit de refroidissement est propre à prélever de 0,5 % à 5% du débit total du ventilateur ;
  • le ou chaque conduit de refroidissement est dimensionné pour que la vitesse de circulation du flux de refroidissement soit au moins égale à 10 m.s-1, et de préférence au moins égale à 30 m.s-1.
According to particular embodiments, the fan comprises one or more of the following features:
  • the or each cooling duct extends in the thickness of the outer shell and the electronic circuit components are in thermal contact with the outer surface of the ferrule;
  • the ferrule is generally cylindrical and the cooling ducts generally extend along a generatrix of the ferrule;
  • each cooling duct comprises a main section extending longitudinally in the thickness of the shell of the upstream stitching at the downstream stitching, this main section being buffered at each end, and in that the cooling duct comprises two generally radical bores connecting the upstream stitching and downstream stitching of the main stump;
  • the current diameter of the or each cooling duct is between 4 and 8 mm;
  • the or each cooling duct is capable of taking from 0.5% to 5% of the total flow rate of the fan;
  • the or each cooling duct is sized so that the flow rate of the cooling flow is at least 10 ms -1 , and preferably at least 30 ms -1 .

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins sur lesquels :

  • la figure 1 est une vue en coupe d'un ventilateur selon l'invention ; et
  • la figure 2 est une vue en perspective de trois-quarts de l'embase du ventilateur portant le circuit électrique.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the drawings in which:
  • the figure 1 is a sectional view of a fan according to the invention; and
  • the figure 2 is a three-quarter perspective view of the fan base carrying the electrical circuit.

Le ventilateur 10 illustré sur la figure 1 est un ventilateur pour avion ou un hélicoptère. Il est propre à être installé sur un circuit de conditionnement d'air pour la cabine pour assurer la mise en mouvement d'un flux d'air. Son débit est compris entre 50 l.s-1 et 1500 l.s-1, et notamment entre 100 l.s-1 et 750 l.s-1, par exemple de 470 l.s-1 The fan 10 illustrated on the figure 1 is a fan for an airplane or a helicopter. It is adapted to be installed on an air conditioning circuit for the cabin to ensure the setting in motion of a flow of air. Its flow rate is between 50 ls -1 and 1500 ls -1 , and in particular between 100 ls -1 and 750 ls -1 , for example 470 ls -1

Il comporte une virole externe 12 délimitant une veine d'air 14, circulant depuis une entrée 16 du ventilateur jusqu'à une sortie 18.It comprises an outer shell 12 delimiting an air stream 14, flowing from an inlet 16 of the fan to an outlet 18.

La virole 12 présente une surface interne 20 délimitant la veine d'air. Cette surface est cylindrique de section circulaire d'axe général X-X formant l'axe de ventilateur.The shell 12 has an inner surface 20 defining the air stream. This surface is cylindrical of circular section of general axis X-X forming the fan axis.

Comme connu en soi, un moteur 22 est prévu suivant l'axe X-X. Ce moteur est porté par des bras de support 24 reliant le stator du moteur à la virole 12. Une roue 26 munie de pâles 28 est montée sur le rotor du moteur du côté de l'entrée d'air 16. Une ogive 29 prolonge le moteur 22 à l'opposé de la roue 26.As known per se, a motor 22 is provided along the X-X axis. This motor is carried by support arms 24 connecting the stator of the motor to the shell 12. A wheel 26 provided with blades 28 is mounted on the rotor of the motor on the side of the air inlet 16. An ogive 29 extends the motor 22 opposite the wheel 26.

Une couronne d'ailettes 30 formant un redresseur d'air s'étend autour du moteur 22 en aval des pâles 28 de la roue. La veine d'air 24 produite par la rotation de la roue 26 circule entre la surface interne 20 de la virole et la surface externe du moteur 22 et de l'ogive 29.A ring of fins 30 forming an air straightener extends around the motor 22 downstream of the blades 28 of the wheel. The air stream 24 produced by the rotation of the wheel 26 flows between the inner surface 20 of the ferrule and the outer surface of the motor 22 and the ogive 29.

Le ventilateur comporte enfin un circuit 40 de commande et d'alimentation du moteur 22. Ce circuit est relié au réseau 42 d'alimentation propre à l'avion en entrée et au moteur 22 en sortie.The fan finally comprises a circuit 40 for controlling and supplying the motor 22. This circuit is connected to the power supply network 42 of the aircraft at the input and to the motor 22 at the output.

Le circuit 40 comporte un ensemble de composants électroniques tels que des bobines 44 portées par des noyaux 46 s'étendant radialement à la surface externe de la virole 12. Les composants sont fixés sur la surface externe de la virole 12 en contact thermique avec celle-ci.The circuit 40 comprises a set of electronic components such as coils 44 carried by cores 46 extending radially to the outer surface of the ferrule 12. The components are fixed on the outer surface of the ferrule 12 in thermal contact with the ferrule 12. this.

Dans ce mode de réalisation, la virole 12 comprend une tubulure 47 généralement cylindrique et une embase 48 de support du circuit 40.In this embodiment, the shell 12 comprises a generally cylindrical pipe 47 and a support base 48 of the circuit 40.

La tubulure 47 comporte une lumière oblongue s'étendant suivant une longueur de la tubulure correspondant sensiblement au droit du moteur 22. L'embase 48 est reçue dans cette lumière et y est solidarisée de manière étanche pour la veine d'air.The tubing 47 has an oblong slot extending along a length of the tubing corresponding substantially to the right of the motor 22. The base 48 is received in this slot and is sealed therein for the air stream.

Les surfaces de la tubulure 47 et de l'embase 48 tournées vers le moteur et toutes deux cylindriques de mêmes courbures affleurent l'une à l'autre. L'embase 48 fait saillie vers l'extérieur radialement de la tubulure 47.The surfaces of the tubing 47 and the base 48 turned towards the engine and both cylindrical of the same curvatures are flush with each other. The base 48 projects radially outwardly from the tubing 47.

L'embase 48 est représentée seule sur la figure 2.The base 48 is shown alone on the figure 2 .

Des passages de refroidissement des composants sont prévus au travers de la virole 12 et notamment de l'embase 48 dans le mode de réalisation considéré.Cooling passages of the components are provided through the shell 12 and in particular the base 48 in the embodiment considered.

Ces passages comportent des conduits continus 50 circulant dans l'épaisseur de la virole. Ils sont généralement parallèles à l'axe X-X et débouchent dans la veine d'air depuis un piquage d'entrée 52 et un ou plusieurs piquages de réintroduction d'air 54, 56.These passages comprise continuous conduits 50 flowing in the thickness of the ferrule. They are generally parallel to the X-X axis and open into the air stream from an inlet tapping 52 and one or more air reintroduction taps 54, 56.

Le piquage d'entrée 52 est disposé en amont du piquage de sortie 54, 56 en considérant le sens de circulation de la veine d'air.The inlet tapping 52 is disposed upstream of the outlet tapping 54, 56 by considering the direction of flow of the air stream.

Les conduits 50 comportent un tronçon principal 60 s'étendant longitudinalement. Ce tronçon est rectiligne et se prolonge au-delà des piquages extrêmes 52 et 56. Ce tronçon est obturé à chaque extrémité par des bouchons 61 formés par exemple de tampon en polymère emmanché en force.The ducts 50 comprise a main section 60 extending longitudinally. This section is rectilinear and extends beyond the extreme taps 52 and 56. This section is closed at each end by plugs 61 formed for example of polymer pad force-fitted.

Les piquages 52, 54, 56 sont formés par des perçages radiaux 62, 64, 66 débouchant dans le tronçon principal 60 et dans la veine d'air au travers de la surface interne de la virole 12 par le piquage correspondant.The connections 52, 54, 56 are formed by radial bores 62, 64, 66 opening in the main section 60 and in the air stream through the inner surface of the shell 12 by the corresponding stitching.

Avantageusement, les perçages radiaux 62, 64, 68 qui relient le tronçon principal 60 à la surface interne de la virole 12 sont réalisés à des positions dépendant de la position du moteur 22 et de la roue 26. Ceci permet d'utiliser une même ébauche d'embase dans des ventilateurs de structure différente en perçant les piquages de manière adaptée. Ainsi, la même pièce peut être utilisée dans plusieurs types de ventilateur, en positionnant à la demande les perçages radiaux aux droits des piquages d'entrée et de sortie souhaités.Advantageously, the radial bores 62, 64, 68 which connect the main section 60 to the inner surface of the shell 12 are made at positions depending on the position of the motor 22 and the wheel 26. This makes it possible to use the same blank of base in fans of different structure by piercing the connections appropriately. Thus, the same part can be used in several types of fan, by positioning the radial holes at the right of the desired inlet and outlet connections.

De préférence, suivant un mode de réalisation alternatif non représenté, la virole externe, et notamment l'embase, est formée par extrusion dans une filière, les tronçons rectilignes 50 étant formés par des inserts amovibles assurant une réservation dans la virole lors de son extrusion.Preferably, according to an alternative embodiment not shown, the outer shell, and in particular the base, is formed by extrusion in a die, the straight sections 50 being formed by removable inserts ensuring a reservation in the shell during its extrusion .

De préférence, le diamètre moyen de chaque conduit est supérieur à 4 mm. Il est de préférence compris entre 4 et 8 mm et avantageusement sensiblement égal à 6 mm.Preferably, the average diameter of each duct is greater than 4 mm. It is preferably between 4 and 8 mm and advantageously substantially equal to 6 mm.

Les conduits 50 sont dimensionnés pour que la vitesse dans les conduits soit supérieure à 10 m.s-1, et de préférence supérieure à 30 m.s-1.The conduits 50 are dimensioned so that the speed in the ducts is greater than 10 ms -1 , and preferably greater than 30 ms -1 .

De plus, le dimensionnement est tel que moins de 5% du débit total du ventilateur circule au travers des conduits 50 de refroidissement. Idéalement, un débit d'environ 2% du débit total circule au travers des conduits de refroidissement 50.In addition, the dimensioning is such that less than 5% of the total flow of the fan flows through the cooling ducts 50. Ideally, a flow rate of about 2% of the total flow circulates through the cooling ducts 50.

Dans l'exemple considéré, le nombre de conduits est égal à 7. Il est de préférence compris entre 2 et 12.In the example considered, the number of ducts is equal to 7. It is preferably between 2 and 12.

On conçoit qu'avec un tel agencement, sous l'effet de la différence de pression entre le piquage aval 52 et le piquage amont 54, 56, un flux de refroidissement s'établit dans les conduits 50. Ce flux étant canalisé dans des conduits de taille relativement réduite, la vitesse du flux de refroidissement est relativement élevée, favorisant ainsi une bonne évacuation de la chaleur produite par les composants électroniques 44 en contact thermique avec la virole 12. De plus, les conduits 50 étant continus, le flux de refroidissement ne circule pas directement en contact des composants, évitant ainsi leur dégradation par d'éventuels contaminants pouvant être contenus dans le flux gazeux mis en mouvement par le ventilateur.It is conceivable that with such an arrangement, under the effect of the pressure difference between the downstream stitching 52 and the upstream stitching 54, 56, a cooling flow is established in the conduits 50. This flow being channeled into ducts relatively small in size, the speed of the cooling flow is relatively high, thus promoting good evacuation of the heat produced by the electronic components 44 in thermal contact with the shell 12. In addition, the ducts 50 being continuous, the cooling flow does not circulate directly in contact with the components, thus avoiding their degradation by possible contaminants that may be contained in the gas flow set in motion by the fan.

Claims (9)

Ventilateur (10) comportant : - une virole externe (12) dont la surface interne (20) délimite une veine d'air (14), - une roue (26) munie de pâles (28) montée rotative dans la virole (12) pour la mise en mouvement de la veine d'air, - un moteur (22) d'entrainement de la roue (26), - un circuit électrique (40) comportant des composants (44) pour la commande et l'alimentation du moteur (22), lequel circuit (40) comporte des moyens de refroidissement des composants (44) par circulation d'air prélevé dans la veine d'air (14), caractérisé en ce que : lesdits moyens de refroidissement comportent un piquage aval (52) d'entrée d'air et un piquage amont (54, 56) de réintroduction d'air formé au travers de la surface interne (20) de la virole (12), et au moins un conduit de refroidissement continu (50) reliant les piquages amont (52) et aval (54, 56) isolant les composants (44) du circuit électrique de l'air circulant dans le conduit de refroidissement (50). Fan (10) comprising: an outer shell (12) whose inner surface (20) delimits an air stream (14), - a wheel (26) provided with blades (28) rotatably mounted in the shell (12) for the setting in motion of the air stream, a motor (22) for driving the wheel (26), - an electrical circuit (40) comprising components (44) for controlling and supplying the motor (22), which circuit (40) comprises means for cooling the components (44) by circulation of air taken from the vein air (14), characterized in that said cooling means comprise a downstream intake (52) of air inlet and an upstream intake (54, 56) of reintroduction of air formed through the inner surface (20) of the ferrule (12), and at least one continuous cooling duct (50) connecting the upstream (52) and downstream (54, 56) connections isolating the components (44) of the electrical circuit of the air circulating in the cooling duct (50). Ventilateur selon la revendication 1, caractérisé en ce que le ou chaque conduit de refroidissement (50) s'étend dans l'épaisseur de la virole externe (12) et les composants (44) de circuit électronique sont en contact thermique avec la surface externe de la virole (12).Fan according to claim 1, characterized in that the or each cooling duct (50) extends in the thickness of the outer shell (12) and the electronic circuit components (44) are in thermal contact with the outer surface of the ferrule (12). Ventilateur selon la revendication 2, caractérisé en ce que la virole (12) est généralement cylindrique et les conduits de refroidissement (50) s'étendent généralement suivant une génératrice de la virole (12).Fan according to claim 2, characterized in that the ferrule (12) is generally cylindrical and the cooling ducts (50) generally extend along a generatrix of the ferrule (12). Ventilateur selon la revendication 2 ou 3, caractérisé en ce que chaque conduit de refroidissement (50) comporte un tronçon principal s'étendant longitudinalement dans l'épaisseur de la virole (12) du piquage amont (52) au piquage aval (54, 56), ce tronçon principal étant tamponné à chaque extrémité, et en ce que le conduit de refroidissement (50) comporte deux perçages (62, 64, 66) généralement radicaux reliant le piquage amont (52) et le piquage aval (54, 56) du tronçon principal.Fan according to claim 2 or 3, characterized in that each cooling duct (50) comprises a main section extending longitudinally in the thickness of the collar (12) of the upstream stitching (52) at the downstream stitching (54, 56 ), this main section being buffered at each end, and in that the cooling duct (50) comprises two generally radical bores (62, 64, 66) connecting the upstream stitching (52) and the downstream stitching (54, 56). of the main section. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le diamètre courant du ou de chaque conduit de refroidissement (50) est compris entre 4 et 8 mm.Fan according to any one of the preceding claims, characterized in that the current diameter of the or each cooling duct (50) is between 4 and 8 mm. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou chaque conduit de refroidissement (50) est propre à prélever de 0,5 % à 5% du débit total du ventilateur.Fan according to any one of the preceding claims, characterized in that the or each cooling duct (50) is capable of taking from 0.5% to 5% of the total flow of the fan. Ventilateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou chaque conduit de refroidissement (50) est dimensionné pour que la vitesse de circulation du flux de refroidissement soit au moins égale à 10 m.s-1, et de préférence au moins égale à 30 m.s-1.Fan according to any one of the preceding claims, characterized in that the or each cooling duct (50) is dimensioned so that the circulation velocity of the cooling stream is at least 10 ms -1 , and preferably at least equal to 30 ms -1 . Ventilateur selon l'une quelconque des revendications précédentes, caractérisé en ce que la veine d'air (14) circule depuis une entrée (16) du ventilateur jusqu'à une sortie (18).Fan according to any one of the preceding claims, characterized in that the air stream (14) flows from an inlet (16) of the fan to an outlet (18). Ventilateur selon l'une quelconque des revendications précédentes, caractérisé en ce que le ou chaque piquage aval d'entrée d'air est formé au travers de la surface interne (20) de la virole (12).Fan according to any one of the preceding claims, characterized in that the or each downstream entry of air is formed through the inner surface (20) of the ferrule (12).
EP15150493.3A 2014-01-09 2015-01-08 Standalone cold plate for cooling the electronic components of an electric fan Active EP2894351B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1450143A FR3016197B1 (en) 2014-01-09 2014-01-09 INDEPENDENT COLD PLATE FOR COOLING ELECTRONIC COMPONENTS OF AN ELECTRIC FAN

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EP2894351A1 true EP2894351A1 (en) 2015-07-15
EP2894351B1 EP2894351B1 (en) 2019-12-04

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FR (1) FR3016197B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6126421B2 (en) * 2013-03-21 2017-05-10 三菱重工オートモーティブサーマルシステムズ株式会社 Motor fan

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US2397171A (en) * 1943-12-06 1946-03-26 Del Conveyor & Mfg Company Fan and motor mounting
US2469820A (en) * 1945-06-01 1949-05-10 Singer Mfg Co Dynamoelectric machine
US3229896A (en) * 1963-11-05 1966-01-18 American Agile Co Vaneaxial fan
GB1130700A (en) * 1966-11-18 1968-10-16 Porsche Kg Axial-flow cooling air blower for internal combustion engines
WO2008109038A2 (en) * 2007-03-05 2008-09-12 Xcelaero Corporation Reverse flow cooling for fan motor
EP2186704A1 (en) * 2007-09-10 2010-05-19 Mitsubishi Electric Corporation Drive device for vehicle
US20120236498A1 (en) 2011-03-17 2012-09-20 Hamilton Sundstrand Corporation Integrated fan motor and controller housing

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Publication number Priority date Publication date Assignee Title
FR2871534B1 (en) * 2004-06-15 2006-08-04 Siemens Vdo Automotive Sas MOTO GROUP FAN WITH ELECTRONIC CONTROL COOLED BY AIR AMBIANT PULSE
US20120243177A1 (en) * 2011-03-21 2012-09-27 Hamilton Sundstrand Corporation Indirect bleed air cooling of a fan motor controller

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2397171A (en) * 1943-12-06 1946-03-26 Del Conveyor & Mfg Company Fan and motor mounting
US2469820A (en) * 1945-06-01 1949-05-10 Singer Mfg Co Dynamoelectric machine
US3229896A (en) * 1963-11-05 1966-01-18 American Agile Co Vaneaxial fan
GB1130700A (en) * 1966-11-18 1968-10-16 Porsche Kg Axial-flow cooling air blower for internal combustion engines
WO2008109038A2 (en) * 2007-03-05 2008-09-12 Xcelaero Corporation Reverse flow cooling for fan motor
EP2186704A1 (en) * 2007-09-10 2010-05-19 Mitsubishi Electric Corporation Drive device for vehicle
US20120236498A1 (en) 2011-03-17 2012-09-20 Hamilton Sundstrand Corporation Integrated fan motor and controller housing

Also Published As

Publication number Publication date
US10018200B2 (en) 2018-07-10
US20150192137A1 (en) 2015-07-09
FR3016197A1 (en) 2015-07-10
FR3016197B1 (en) 2019-05-24
EP2894351B1 (en) 2019-12-04

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