Abstract: An electronic component cooling apparatus capable of permitting a sufficient amount of air to be fed to an electronic component to be cooled. An impeller which includes a plurality of blades for sucking air from one side in an axial direction of a revolving shaft of a motor is fixed on a rotor of the motor. A casing having a cylindrical cavity defined therein in which the motor and impeller are received is constructed of a peripheral wall arranged so as to surround the impeller and a closing wall for closing an end of the cavity on the other side in the axial direction. The peripheral wall is formed at a portion thereof in proximity to an end thereof on the one side with a lateral discharge port through which air suckedly introduced into the cavity is discharged so that a surrounding portion for surrounding a whole circumference of the impeller is left at a portion of the peripheral wall in proximity to an end on the other side.

Abstract: An electronic component cooling apparatus capable of minimizing a reduction in cooling efficiency even when discharge of air heated is restricted to two directions and reducing a manufacturing cost. The cooling apparatus includes a heat sink including an elongated base having a plurality of radiation fins arranged thereon, as well as a fan unit. The fan unit includes a casing in which an impeller provided with a plurality of blades and a motor for revolving the impeller are received. The casing is releasably mounted on the heat sink. The heat sink and the casing of the fan unit cooperate with each other to define two discharge ports and form an air flow space which continuously extends between an end of the radiation fins facing the casing and an opposite wall of the casing.

Abstract: An electronic component cooling apparatus capable of minimizing or substantially preventing a reduction in cooling efficiency even when discharge of air heated is restricted to two directions. The cooling apparatus includes a heat sink including an elongated base having a plurality of radiation fins arranged thereon, as well as a fan unit. The fan unit includes an impeller provided with a plurality of blades, a motor for revolving the impeller and a casing formed with a suction opening for receiving the impeller and motor therein. The casing is releasably mounted on the heat sink. The heat sink and casing of the fan unit cooperate with each other to define two discharge ports on both ends of the base in a longitudinal direction thereof. The casing is provided with a pair of guide extensions for air guide in a manner to extend in a longitudinal direction of the base of the heat sink.

Abstract: A heating element cooling apparatus which is capable of improving the cooling efficiency without greatly increasing the overall weight thereof. A heat sink 2 for the heating element cooling apparatus is equipped with an air fan 1. A heat conducting element 3 having higher heat conductivity than a base 2a of the heat sink 2 is conductivity attached to the base 2a. Plural radiation fins 6 are mounted on an extended portion 3c of the heat conducting element 3 which extends exceeding the base 2a. The heat generated by a heating element 4, which is heat-conductively attached on the heat conducting element 3, is outwardly conducted toward the peripheral portion of the heat sink through the heat conducting element 3 and radiated from the radiation fins 2b, resulting in increasing the radiation efficiency.

Abstract: An electronic component cooling apparatus capable of permitting a sufficient amount of air to be fed to an electronic component to be cooled. An impeller which includes a plurality of blades for sucking air from one side in an axial direction of a revolving shaft of a motor is fixed on a rotor of the motor. A casing having a cylindrical cavity defined therein in which the motor and impeller are received is constructed of a peripheral wall arranged so as to surround the impeller and a closing wall for closing an end of the cavity on the other side in the axial direction. The peripheral wall is formed at a portion thereof in proximity to an end thereof on the one side with a lateral discharge port through which air suckedly introduced into the cavity is discharged so that a surrounding portion for surrounding a whole circumference of the impeller is left at a portion of the peripheral wall in proximity to an end on the other side.

Abstract: An air fan capable of increasing the amount of air fed in a radial direction thereof. An impeller which includes a plurality of blades for sucking air from one side in an axial direction of a revolving shaft of a motor and guiding sucked air mainly toward the other side in the axial direction is mounted on a rotor of the motor. A casing includes a peripheral wall arranged so as to define a cavity therein in which the motor and impeller are received. A cavity is closed at each of both ends in the axial direction with a closing wall. The peripheral wall is provided at a portion thereof in proximity to an end thereof on the one side with a lateral suction port which permits air to be suckedly introduced therethrough into the cavity in a radial direction of the revolving shaft.

Abstract: An electronic component cooling apparatus capable of permitting a sufficient amount of air to be fed to an electronic component to be cooled. An impeller which includes a plurality of blades for sucking air from one side in an axial direction of a revolving shaft of a motor is fixed on a rotor of the motor. A casing having a cylindrical cavity defined therein in which the motor and impeller are received is constructed of a peripheral wall arranged so as to surround the impeller and a closing wall for closing an end of the cavity on the other side in the axial direction. The peripheral wall is formed at a portion thereof in proximity to an end thereof on the one side with a lateral discharge port through which air suckedly introduced into the cavity is discharged so that a surrounding portion for surrounding a whole circumference of the impeller is left at a portion of the peripheral wall in proximity to an end on the other side.

Abstract: A heat sink for an electronic component cooling apparatus being small in size and having reduced weight, being capable of coping with increasing amounts of heat generation from the electronic component and capable of performing high cooling efficiency.A plurality of radiation fins 3 surrounding an impeller of a fan are mounted on a side of a base 2 of a heat sink 1. A heat conductive thick portion comprising linear ribs 4 and an annular rib 5 is formed on the base 2 where it is surrounded by the radiation fins 3. The linear ribs 4 and the annular rib 5, having more thickness than the radiation fin mounting area 6, are formed of a pattern that can reduce the resistance of heat transfer between a heat source opposed-portion 7, which opposes to the heat source of the electronic component and the radiation fin mounting area 6.

Abstract: An air fan capable of increasing the amount of air fed in a radial direction thereof. An impeller which includes a plurality of blades for sucking air from one side in an axial direction of a revolving shaft of a motor and guiding sucked air mainly toward the other side in the axial direction is mounted on a rotor of the motor. A casing includes a peripheral wall arranged so as to define a cavity therein in which the motor and impeller are received. The peripheral wall is provided at a portion thereof in proximity to an end thereof on the one side with a lateral suction port which permits air to be suckedly introduced therethrough into the cavity in a radial direction of the revolving shaft. Also, the peripheral wall of the casing is provided at a portion thereof in proximity to an end thereof on the other side with a lateral discharge port which permits air suckedly introduced into the cavity to be discharged therethrough in the radial direction.

Abstract: An electronic component cooling apparatus capable of permitting a heat sink to exhibit satisfactory cooling efficiency and increasing durability of a motor. A plurality of radiation fins are provided on a base of a heat sink in a manner to surround an impeller including blades and fixed on a rotor of a motor. The radiation fins are arranged so as to be in conformity to a direction of flowing of air from the impeller being rotated. The blades each are constructed so as to permit air to be sucked in from a side of webs and discharged through an air passage defined between each adjacent two of the radiation fins.

Abstract: An electronic component cooling apparatus capable of permitting a cooling unit to be assembled separately from a holder mounting member. The holder mounting member is used for mounting an electronic component holder on the cooling unit while keeping an electronic component contacted with a rear surface of a base of a heat sink. The holder mounting member includes a unit engagement segment including an annular member engaged with a flange section of a casing of a motor-driven fan and holder engagement segments each formed at an end thereof with a hole releasably engaged with each of projections provided on the electronic component holder.