Openings in a blower housing for noise reduction

Abstract

A fan arrangement for a heat exchanger of a motor vehicle, a system for a motor vehicle, and a motor vehicle. A fan is arranged downstream of the heat exchanger in an air supply direction. The fan is arranged in a fan cowling which covers an air passage area of the heat exchanger and which is arranged spaced from the heat exchanger in an axial direction and coupled to the heat exchanger via a sealing part. A plurality of air passages having openings are arranged opposite each other in the sealing part. The dimensions of the air passage openings in a direction perpendicular to the air supply direction, in relation to the peripheral area of the sealing part, is at least a factor of 0.025 of the diameter of the fan, and the dimensions of the air passage openings in the direction of the air supply, is at least 0.0025 of the diameter of the fan.

What is claimed is: 
     
         1 . A fan arrangement for a heat exchanger of a motor vehicle, the fan arrangement comprising:
 a fan cowling spaced from the heat exchanger in an air supply direction and which covers an air passage area of the heat exchanger;   a sealing part which couples the fan cowling to the heat exchanger; and   a fan arranged in the fan cowling downstream of the heat exchanger in the air supply direction;   a plurality of upper air passages arranged at a lower region of the sealing part; and   a plurality of lower air passages arranged at an upper region of the sealing part and arranged spatially opposite to the upper air passages,   wherein an opening of each of the upper and lower air passages is sized such that:
 in a direction perpendicular to the air supply direction is at least 0.025 of the diameter of the fan; and 
 in a direction of the air supply, is at least 0.0025 of the diameter of the fan. 
   
     
     
         2 . The fan arrangement of  claim 1 , wherein the upper air passages are arranged spatially above fan. 
     
     
         3 . The fan arrangement of  claim 1 , wherein the lower air passages are arranged spatially below fan. 
     
     
         4 . The fan arrangement of  claim 1 , wherein:
 the upper air passages are arranged spatially above fan; and   the lower air passages are arranged spatially below fan.   
     
     
         5 . The fan arrangement of  claim 1 , wherein the openings of adjacent upper air passages part have different sizes and/or shapes. 
     
     
         6 . The fan arrangement of  claim 1 , wherein the openings of adjacent lower air passages part have different sizes and/or shapes. 
     
     
         7 . The fan arrangement of  claim 1 , wherein:
 the openings of adjacent upper air passages part have different sizes and/or shapes; and   the openings of adjacent upper air passages part have different sizes and/or shapes   
     
     
         8 . The fan arrangement of  claim 1 , wherein the opening of each of the upper and lower air passages is sized such that in a direction perpendicular to the air supply direction is at a maximum of 1/10 of the diameter of the fan. 
     
     
         9 . The fan arrangement of  claim 1 , wherein the opening of each of the upper and lower air passages have an area proportion of at least 0.0000625 of an air passage area of the fan. 
     
     
         10 . A system for a motor vehicle, the system comprising:
 a heat exchanger;   a fan arrangement for the heat exchanger, the fan arrangement including:
 a fan cowling spaced from the heat exchanger in an air supply direction and which covers an air passage area of the heat exchanger; 
 a sealing part which couples the fan cowling to the heat exchanger; 
 a fan arranged in the fan cowling downstream of the heat exchanger in the air supply direction; 
 a plurality of upper air passages arranged at a lower region of the sealing part; and 
 a plurality of lower air passages arranged at an upper region of the sealing part and arranged spatially opposite to the upper air passages, 
   wherein an opening of each of the upper and lower air passages is sized such that:
 in a direction perpendicular to the air supply direction is at least 0.025 of the diameter of the fan; and 
 in a direction of the air supply, is at least 0.0025 of the diameter of the fan. 
   
     
     
         11 . A motor vehicle, comprising:
 a heat exchanger;   a fan arrangement for the heat exchanger, the fan arrangement including:
 a fan cowling spaced from the heat exchanger in an air supply direction and which covers an air passage area of the heat exchanger; 
 a sealing part which couples the fan cowling to the heat exchanger; 
 a fan arranged in the fan cowling downstream of the heat exchanger in the air supply direction; 
 a plurality of upper air passages arranged at a lower region of the sealing part; and 
 a plurality of lower air passages arranged at an upper region of the sealing part and arranged spatially opposite to the upper air passages, 
   wherein an opening of each of the upper and lower air passages is sized such that:
 in a direction perpendicular to the air supply direction is at least 0.025 of the diameter of the fan; and 
 in a direction of the air supply, is at least 0.0025 of the diameter of the fan 
   
     
     
         12 . The motor vehicle of  claim 11 , wherein the upper air passages are arranged spatially above fan. 
     
     
         13 . The motor vehicle of  claim 11 , wherein the lower air passages are arranged spatially below fan. 
     
     
         14 . The motor vehicle of  claim 11 , wherein:
 the upper air passages are arranged spatially above fan; and   the lower air passages are arranged spatially below fan.   
     
     
         15 . The motor vehicle of  claim 11 , wherein the openings of adjacent upper air passages part have different sizes and/or shapes. 
     
     
         16 . The motor vehicle of  claim 11 , wherein the openings of adjacent lower air passages part have different sizes and/or shapes. 
     
     
         17 . The motor vehicle of  claim 11 , wherein:
 the openings of adjacent upper air passages part have different sizes and/or shapes; and   the openings of adjacent upper air passages part have different sizes and/or shapes   
     
     
         18 . The motor vehicle of  claim 11 , wherein the opening of each of the upper and lower air passages is sized such that in a direction perpendicular to the air supply direction is at a maximum of 1/10 of the diameter of the fan. 
     
     
         19 . The motor vehicle of  claim 11 , wherein the opening of each of the upper and lower air passages have an area proportion of at least 0.0000625 of an air passage area of the fan.