Low aspect ratio fan

Abstract

A fan with a housing a front face, a back face, and a side portion extending between and securing together the front face and the back face, and a duct extending from a top portion of the housing for directing air flow. The fan further includes a rotor secured within the housing, the rotor comprising a motor housing and a plurality of arcuate blades, wherein the motor housing comprises a plurality of interlocking recesses formed therein and one end of each of the plurality of blades comprises an interlocking pin, wherein the interlocking pin is received into a respective interlocking recess in the motor housing for securing the blade to the motor housing. Air is received into an inlet formed into the front face of the housing and circulated over the motor and the blades for cooling an area.

1 . A fan comprising:
 a housing having a front face, a back face, and a side portion extending between and securing together the front face and the back face, and a duct extending from a top portion of the housing for directing air flow; and   a rotor secured within the housing, the rotor comprising a motor housing and a plurality of arcuate blades, wherein the motor housing comprises a plurality of interlocking recesses formed therein and one end of each of the plurality of blades comprises an interlocking pin, wherein the interlocking pin is received into a respective interlocking recess in the motor housing for securing the blade to the motor housing;   wherein:
 air is received into an inlet formed into the front face of the housing and circulated over the motor and the blades for cooling an area; and the fan has aspect ratio of at least 3. 
   
     
     
         2 . The fan of  claim 1 , wherein the fan has an aspect ratio of at least 4. 
     
     
         3 . The fan of  claim 1 , wherein the fan is equipped with a motor configured to operate in the range of from 10 to 500 rotations per minute and generate a constant torque of at least 13 NM. 
     
     
         4 . The fan of  claim 1 , wherein the blades extend outwardly and arcuately from the motor housing with an arc in the range of from 25 to 40 degrees.