Radial blower

Abstract

The invention relates to a radial blower for delivering an air flow, having a drive motor, having a motor holder and having a fan impeller which has a hub bell at least partially overlapping the drive motor, wherein the fan impeller can be driven by the drive motor via an axially running shaft, wherein a surface, which faces toward the fan impeller, of the motor holder has flow-manipulating elements.

1 . Radial blower for delivering an air flow, having a drive motor, having a motor holder and having a fan impeller which has a hub bell at least partially overlapping the drive motor, wherein the fan impeller can be driven by the drive motor via an axially running shaft, characterized in that a surface, which faces toward the fan impeller, of the motor holder has flow-manipulating elements. 
     
     
         2 . Radial blower according to  claim 1 , wherein the motor holder has an axially projecting ring which is arranged outside the radial extent of the fan impeller and which at least partially overlaps the fan impeller in an axial direction. 
     
     
         3 . Radial blower according to  claim 1 , wherein the motor holder is formed by an annular body, wherein the radially inner end region surrounds the drive motor and the radially outer end region is at least partially connected to a housing surrounding the radial blower. 
     
     
         4 . Radial blower according to  claim 1 , wherein the surface, which faces toward the fan impeller, of the motor holder runs in a descending and/or ascending and/or horizontal manner from the radially inner end region to the radially outer end region. 
     
     
         5 . Radial blower according to  claim 1 , wherein the flow-manipulating elements are formed by axially protruding rib elements and/or by grooves and/or by studs and/or by depressions. 
     
     
         6 . Radial blower according to  claim 1 , wherein the flow-manipulating elements form a regular and/or irregular pattern on the surface, which faces toward the fan impeller, of the motor holder. 
     
     
         7 . Radial blower according to  claim 1 , wherein the depressions and/or the studs have a diameter in a range from 1 mm to 15 mm, preferably in a range from 1 mm to 5 mm, and the depressions and/or the studs have a depth or height, respectively, of between 0.5 mm and 5 mm, wherein the distance between adjacent depressions and/or studs is in a range from 1 mm to 25 mm, preferably in a range from 1 mm to 15 mm. 
     
     
         8 . Radial blower according to  claim 1 , wherein the rib elements and/or the grooves have a height or a depth, respectively, of 0.5 mm to 4 mm, wherein the width of the rib elements and/or of the grooves is preferably in a range from 1 mm to 3 mm, wherein the distance between adjacent rib elements and/or grooves is preferably between 1 mm and 25 mm, preferably in a range from 1 mm to 15 mm. 
     
     
         9 . Radial blower according to  claim 1 , wherein the rib elements and/or the grooves form a rhomboidal structure, wherein individual rib elements and/or grooves intersect. 
     
     
         10 . Radial blower according to  claim 1 , wherein the surface, which faces toward the fan impeller, of the motor holder has an irregular structure, wherein the depressions have a depth of 0.5 mm to 5 mm and are distributed randomly along the surface. 
     
     
         11 . Radial blower according to  claim 1 , wherein the studs are in the form of conical elements and/or pin-shaped elements and/or cylindrical elements. 
     
     
         12 . Radial blower according to  claim 1 , wherein the fan impeller has a multiplicity of axially running fan blades, wherein the fan blades are divided into a first region and a second region, wherein the first region of the fan blades is arranged at that end region of the fan blades which is remote from the drive motor, and the axially extending ring of the motor holder partially or completely overlaps the second region of the fan blades. 
     
     
         13 . Radial blower according to  claim 1 , wherein the fan blades have obstructive bodies and/or slots and/or notches in the second region.