Patent ID: 8297951

Claim:
A fan ( 20 ) comprising: a motor having a housing ( 22 , 24 ), a stator ( 40 ) and a rotor ( 60 ) with at least one fan blade ( 68 ); said housing defining at least one air inlet ( 29 ) having an air entrance opening ( 30 , 102 ) for intake of air and at least one air outlet ( 37 ) having an air exit opening ( 32 ) for discharge of air ( 31 ); a flat circuit board ( 80 ) formed with at least one recess ( 89 ), which circuit board ( 80 ) is arranged adjacent the air inlet ( 29 ) in such a way that air can enter the fan ( 20 ) through the recess ( 89 ), a first portion ( 87 ) of the circuit board ( 80 ) being arranged adjacent a periphery of the air inlet ( 29 ), motor electronics ( 88 ) being arranged on the first portion of the circuit board ( 80 ), said motor electronics including a power stage having at least one semiconductor switch, being arranged on the first portion ( 87 ) of the circuit board ( 80 ).