Axial fan housing configured to redirect the recirculating flow of leak air in the main flow direction

Abstract

The invention also concerns a corresponding ventilation device (5) and a corresponding cooling module

1 . A support for a ventilation device of a motor vehicle, the ventilation device including an impeller configured to be rotated about a rotation axis in such a way as to generate a flow of air, the support comprising:
 a nozzle having:
 an orifice configured to receive the impeller 
 at the periphery of the orifice, an internal wall configured to cover at least partially one side of a peripheral shroud of the impeller, and 
 on the internal wall, an air guide shaped so as to direct a flow of air flowing between the peripheral shroud and the internal wall, in the direction of flow of the flow of air generated by the impeller. 
   
     
     
         2 . The support as claimed in  claim 1 , wherein the internal wall of the nozzle has an axial section configured to extend around the peripheral shroud and a curved section extending toward the interior of the orifice so as to cover radially the end of said shroud when the impeller is assembled into the nozzle. 
     
     
         3 . The support as claimed in  claim 2 , wherein the air guide is formed on the axial section. 
     
     
         4 . The support as claimed in  claim 2 , in which the air guide is formed on the curved section. 
     
     
         5 . The support as claimed in  claim 1 , wherein the air guide is produced by at least one of the following elements: ribs, protuberances, pins, studs and recesses. 
     
     
         6 . A ventilation device for motor vehicles, said device comprising:
 an impeller configured to be rotated about a rotation axis in such a manner as to generate a flow of air, the impeller including a plurality of blades and a peripheral shroud connecting the tips of the blades; and   a support including:
 a nozzle having an orifice configured to receive the impeller, 
 at the periphery of the orifice, an internal wall configured to cover at least partially one side of a peripheral shroud of the impeller, and 
 on the internal wall, an air guide shaped so as to direct a flow of air flowing between the peripheral shroud and the internal wall, in the direction of flow of the flow of air generated by the impeller. 
   
     
     
         7 . The device as claimed in  claim 6 , wherein the internal wall of the nozzle of the support has an axial section configured to extend around the peripheral shroud and a curved section extending toward the interior of the orifice so as to cover radially the end of said shroud when the impeller is assembled into the nozzle, and wherein the peripheral shroud has a substantially cylindrical shape and the curved section has a substantially “U” shape. 
     
     
         8 . The device as claimed in  claim 6 , wherein the internal wall of the nozzle of the support has an axial section configured to extend around the peripheral shroud and a curved section extending toward the interior of the orifice so as to cover radially the end of said shroud when the impeller is assembled into the nozzle, and wherein the curved section delimits a groove inside which the peripheral shroud of the impeller extends. 
     
     
         9 . The device as claimed in  claim 6 , wherein the internal wall of the nozzle of the support has an axial section configured to extend around the peripheral shroud and a curved section extending toward the interior of the orifice so as to cover radially the end of said shroud when the impeller is assembled into the nozzle, and wherein the curved section delimits a groove, and in which the peripheral shroud of the impeller is set back axially relative to the groove. 
     
     
         10 . A cooling module for motor vehicles, including:
 a ventilation device comprising:
 an impeller having a plurality of blades and a peripheral shroud connecting the tips of the blades, the impeller being configured to be rotated about a rotation axis so as to generate a flow of air, and 
 a support including:
 a nozzle having an orifice configured to receive the impeller, 
 at the periphery of the orifice, an internal wall configured to cover at least partially one side of a peripheral shroud of the impeller, and 
 on the internal wall, an air guide shaped so as to direct a flow of air flowing between the peripheral shroud and the internal wall, in the direction of flow of the flow of air generated by the impeller; and 
 
   a heat exchanger located on the path of at least part of the air flow generated by the impeller.