Abstract: A heat dissipation device dissipates heat generated by a heat-generating electronic element mounted on a top surface printed circuit board. The printed circuit board defines a plurality of first through holes. The heat dissipation device comprises a heat spreader located at a top side of the printed circuit board. The heat spreader defines a plurality of second through holes corresponding to the first through holes, respectively. A first heat sink is located over the heat spreader, and a plurality of second heat sinks is located at a bottom side of the printed circuit board. A plurality of heat pipes extending through the second through holes of the heat spreader and the first through holes of the printed circuit board to thermally connect the first and second heat sinks to the heat spreader.

Abstract: A heat dissipation device includes a base, a fin group located on the base, a first heat pipe and a second heat pipe. The fin group includes a first fin group, a second fin group arranged on the first fin group and a third fin group arranged on the second fin group. The first heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion sandwiched between the first fin group and the second fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion. The second heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion located between the second fin group and the third fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion thereof.

Abstract: A heat dissipation device dissipates heat generated by a heat-generating electronic element mounted on a top surface printed circuit board. The printed circuit board defines a plurality of first through holes. The heat dissipation device comprises a heat spreader located at a top side of the printed circuit board. The heat spreader defines a plurality of second through holes corresponding to the first through holes, respectively. A first heat sink is located over the heat spreader, and a plurality of second heat sinks is located at a bottom side of the printed circuit board. A plurality of heat pipes extending through the second through holes of the heat spreader and the first through holes of the printed circuit board to thermally connect the first and second heat sinks to the heat spreader.

Abstract: A heat dissipation device adapted for dissipating heat from a heat-generating device includes a heat pipe assembly and a fin set. The heat pipe assembly is adapted for absorbing heat from the heat-generating device, and includes a plurality of bending heat pipes each having a top face and a bottom face. The fin set thermally engaged with the heat pipe assembly includes a plurality of fins and has a bottom surface cooperatively formed by bottom edges of the fins. The heat pipes of the heat pipe assembly are juxtaposed with each other; the top faces of the heat pipes are thermally attached to the bottom surface of the fin set; the bottom faces of the heat pipes are positioned level with each other to form a contacting surface for contacting with the heat generating device.

Abstract: A heat dissipation device attached to a top surface of an electronic device mounted on a printed circuit board, includes a heat sink and a retainer securing the heat sink onto the electronic device. The retainer includes a frame, a plurality of baffle walls and protrusion posts extending downwardly from the frame. Lower ends of the baffle walls of the retainer extend downwardly through the heat sink and engage with engaging edges of the electronic device. The heat dissipation device is further provided with a plurality of elastic members which respectively surround the protrusion posts of the retainer and are compressed between the retainer and the heat sink, thereby pushing the heat sink downwardly toward the electronic device.

Abstract: A heat dissipation device used for dissipating heat generated by an electronic device comprises a base defining two cutouts recessed from two opposite sides thereof, two fasteners mounted in through holes of the base via the two cutouts and two elastic members coiled around the two fasteners. Each of the two fasteners comprises a shaft, a head and a threaded pole located at two ends of the shaft, a latching portion interconnecting the shaft and the threaded pole and a mounting portion which is formed on the shaft and located a distance above the latching portion. The mounting portion extends through the cutout and makes the elastic member be sandwiched elastically between the head and a top face of the base. The latching portion abuts against a bottom face of the base, thereby the two fasteners being mounted on the base.

Abstract: A heat dissipation device comprises at least two heat pipes (10) and a plurality of fins (20) thermally connected with the heat pipes (10). Each of the heat pipes (10) comprises a flattened evaporating portion (12) and a condensing portion (14). The evaporating portions (12) are closely connected with each other. A flat bottom surface (125) of the evaporating portions (12) of the heat pipes (10) directly engages with an electronic component. A flat top surface (120) of the evaporating portions (12) of the heat pipes (10) directly engages with a bottom surface of the fins (20). The condensing portions (14) of the heat pipes (10) extend through the fins (20).

Abstract: A heat dissipation device attached to a top surface of an electronic device mounted on a printed circuit board, includes a heat sink and a retainer securing the heat sink onto the electronic device. The retainer includes a frame, a plurality of baffle walls and protrusion posts extending downwardly from the frame. Lower ends of the baffle walls of the retainer extend downwardly through the heat sink and engage with engaging edges of the electronic device. The heat dissipation device is further provided with a plurality of elastic members which respectively surround the protrusion posts of the retainer and are compressed between the retainer and the heat sink, thereby pushing the heat sink downwardly toward the electronic device.

Abstract: A heat dissipation device includes a base, a fin group located on the base, a first heat pipe and a second heat pipe. The fin group includes a first fin group, a second fin group arranged on the first fin group and a third fin group arranged on the second fin group. The first heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion sandwiched between the first fin group and the second fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion. The second heat pipe includes an evaporating portion sandwiched between the base and the first fin group, a condensing portion located between the second fin group and the third fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion thereof.

Abstract: A heat dissipation device adapted for dissipating heat from a heat-generating device includes a heat pipe assembly and a fin set. The heat pipe assembly is adapted for absorbing heat from the heat-generating device, and includes a plurality of bending heat pipes each having a top face and a bottom face. The fin set thermally engaged with the heat pipe assembly includes a plurality of fins and has a bottom surface cooperatively formed by bottom edges of the fins. The heat pipes of the heat pipe assembly are juxtaposed with each other; the top faces of the heat pipes are thermally attached to the bottom surface of the fin set; the bottom faces of the heat pipes are positioned level with each other to form a contacting surface for contacting with the heat generating device.

Abstract: A heat dissipation device comprises at least two heat pipes (10) and a plurality of fins (20) thermally connected with the heat pipes (10). Each of the heat pipes (10) comprises a flattened evaporating portion (12) and a condensing portion (14). The evaporating portions (12) are closely connected with each other. A flat bottom surface (125) of the evaporating portions (12) of the heat pipes (10) directly engages with an electronic component. A flat top surface (120) of the evaporating portions (12) of the heat pipes (10) directly engages with a bottom surface of the fins (20). The condensing portions (14) of the heat pipes (10) extend through the fins (20).