Fan for a heat exchanger of a vehicle

Abstract

A fan for a heat exchanger of a vehicle includes a ventilator, and a frame surrounding the ventilator. Optionally, the fan for the heat exchanger further includes a protection grid upstream of the ventilator and a ring which is suitable for deflecting a backflow and which is integrated into the frame or the protection grid.

What is claimed is: 
     
         1 . A fan for a heat exchanger of a vehicle, comprising a ventilator, a frame surrounding the ventilator, a protection grid upstream of the ventilator, and a ring which is suitable for deflecting a backflow and which is integrated into the frame or the protection grid. 
     
     
         2 . The fan according to  claim 1 , wherein the ring is suitable for deflecting the backflow by at least 300 degrees. 
     
     
         3 . The fan according to  claim 1 , wherein the ring is arranged downstream of the protection grid with respect to a direction of flow. 
     
     
         4 . The fan according to  claim 1 , wherein mounting struts for a ventilator motor are arranged upstream of the ventilator with respect to a direction of flow. 
     
     
         5 . The fan according to  claim 1 , wherein the protection grid has a plurality of concentric and/or radial ribs. 
     
     
         6 . The fan according to  claim 5 , wherein the protection grid has the concentric ribs and the protection grid has an opening which extends over the concentric ribs. 
     
     
         7 . The fan according to  claim 5 , wherein the protection grid has the radial ribs and the radial ribs are inclined, curved, or crescent-shaped in a different direction than blades of the ventilator. 
     
     
         8 . The fan according to  claim 1 , wherein the ring has a portion extending radially in cross-section and a portion extending axially at least at one angle. 
     
     
         9 . The fan according to  claim 1 , wherein a transition from an axially extending portion of the frame to a radially extending portion of the ring and/or from the radially extending portion of the ring to a portion of the ring, which extends at least at one angle to an axial direction, has a rounded shape.