Patent ID: 6137680
Filing Date: 2000-10-24
Classification: H01L

Abstract:
An electronic component cooling apparatus comprising:a heat sink including an elongated base and a pair of side walls provided integrally with said base;said base having a rear surface mounted thereon with an electronic component to be cooled and a front surface provided thereon with a plurality of radiation fins;said side walls being arranged on both sides of said base defined so as to extend in a longitudinal direction of said base and having said radiation fins interposedly arranged therebetween;a fan unit including an impeller provided with a plurality of blades, a motor including a housing and a revolving shaft fixedly mounted thereon with a rotor on which said impeller is mounted and acting to rotate said impeller, a casing provided with a suction opening for receiving said impeller and motor therein, and a plurality of webs for connecting said housing of said motor and said casing to each other so as to position said motor at a central portion of said suction opening, said casing being fixed on said heat sink;said blades of said fan unit being constructed so as to suck air through said suction opening toward said base and discharge air in both an axial direction of said revolving shaft and a radial direction thereof;said casing including an elongated opposite wall arranged opposite to the front surface of said heat sink and a pair of side walls arranged on both sides of said opposite wall defined so as to extend in a longitudinal direction of said opposite wall and extend toward said heat sink, and an annular wall arranged on said opposite wall so as to extend in a direction away from said opposite wall of said casing and having said suction opening defined therein;said radiation fins of said heat sink being arranged so as to permit a part of said radiation fins to be present at a portion of said heat sink opposite to said impeller and so as not to define a space in which a circumference of a portion of said impeller facing said heat sink is received;said casing and heat sink, when both are combined with each other, cooperating with each other to form two discharge ports on both ends of said base defined in said longitudinal direction thereof and form an air flow space which continuously extends from any one of said discharge ports to the other discharge port between an end of said radiation fins positioned on a side of said casing and said opposite wall of said casing;said blades being positioned at a part thereof facing said heat sink in said air flow space.