Turbine for tangential fan intended for being provided in a motor vehicle, tangential fan, ventilation device and heat-exchange module for a motor vehicle

Abstract

The present invention relates to an impeller (102) for a tangential fan (100) intended to be fitted to a motor vehicle, the impeller extending chiefly in the direction of a longitudinal axis (L102) of the impeller (102), the impeller (102) having a plurality of blades (110) distributed in stages (112; 1121; 1122) along said longitudinal axis (L102) of the impeller (102), each stage (112; 1121; 1122) comprising a plurality of blades (110) angularly distributed about said longitudinal axis (L102) of the impeller (102), the blades (110) of each stage (112; 1121; 1122) of blades (110) preferably being equally angularly distributed about said longitudinal axis (L102) of the impeller (102), in which impeller the blades (110) of a first stage (1121) of blades (110) are angularly offset from the blades (110) of at least a second stage (1122) of blades (110).

1 . An impeller for a tangential fan to be fitted to a motor vehicle, the impeller extending chiefly in the direction of a longitudinal axis of the impeller, the impeller comprising:
 a plurality of blades distributed in stages along said longitudinal axis of the impeller, each stage comprising a plurality of blades angularly distributed about said longitudinal axis of the impeller,   the blades of each stage of blades being equally angularly distributed about said longitudinal axis of the impeller, in which impeller the blades of a first stage of blades are angularly offset from the blades of at least a second stage of blades.   
     
     
         2 . The impeller as claimed in  claim 1 , wherein the blades of the first stage of blades are angularly offset from the blades of the two stages of blades neighboring said first stage of blades. 
     
     
         3 . The impeller as claimed in  claim 2 , wherein the blades of each first stage of blades are angularly offset from the blades of the two stages of blades neighboring each first stage of blades. 
     
     
         4 . The impeller as claimed in  claim 1 , wherein the blades of the first stage of blades are angularly offset from the blades of the at least one second stage of blades by an angular offset corresponding to the thickness of the blades of the first stage of blades and/or of the second stage of blades. 
     
     
         5 . The impeller as claimed in  claim 1 , wherein the blades of the first stage of blades are angularly offset from the blades of the at least one second stage of blades by an angular offset equal to half the angular spacing between the blades of the first stage of blades and/or of the at least one second stage of blades. 
     
     
         6 . The impeller as claimed in  claim 1 , wherein the blades of said first stage of blades are angularly offset from all the blades of all the other stages of blades. 
     
     
         7 . The impeller as claimed in  claim 6 , wherein the blades of the each stage of blades are angularly offset from all the blades of all the other stages of blades. 
     
     
         8 . A tangential fan configured to be fitted to a motor vehicle comprising:
 a blower housing defining a substantially cylindrical housing;   an electric motor; and   an impeller housed in the substantially cylindrical housing and configured to be driven in rotation by the electric motor, the impeller comprising:   a plurality of blades distributed in stages along said longitudinal axis of the impeller, each stage comprising a plurality of blades angularly distributed about said longitudinal axis of the impeller,   the blades of each stage of blades being equally angularly distributed about said longitudinal axis of the impeller, in which impeller the blades of a first stage of blades are angularly offset from the blades of at least a second stage of blades.   
     
     
         9 . A ventilation device for a motor vehicle heat-exchange module, comprising:
 a tangential fan having a blower housing defining a substantially cylindrical housing, an electric motor, and an impeller housed in the substantially cylindrical housing and configured to be driven in rotation by the electric motor, the impeller comprising:
 a plurality of blades distributed in stages along said longitudinal axis of the impeller, each stage comprising a plurality of blades angularly distributed about said longitudinal axis of the impeller, 
 the blades of each stage of blades being equally angularly distributed about said longitudinal axis of the impeller, in which impeller the blades of a first stage of blades are angularly offset from the blades of at least a second stage of blades; and 
   a plurality of tubes able to be supplied with air flow by the tangential fan, each tube having at least one ejection opening for a flow of air passing along the tube.   
     
     
         10 . A heat-exchange module for a motor vehicle comprising: a heat-exchange device; and a ventilation device as claimed in  claim 9 , which is configured to generate a flow (F1) of air through the heat-exchange device.