Abstract: A dissipation module has a dissipation fin module and a centrifugal fan. The centrifugal fan outputs airflow towards the dissipation fin module to remove the heat from it. The centrifugal fan includes a centrifugal impeller mounted on a motor. An outer housing houses the motor and the centrifugal impeller. Convex members or concave portions are formed on an inner wall of the housing outlet so as to reduce noise. The dissipation fin module includes a fin set closely attached to a heat source, as well as an airflow channel housing. Convex members or concave portions are also formed on an inner wall of the airflow channel for reducing noise.

Abstract: A dissipation device has a dissipation fin set and a centrifugal fan. The centrifugal fan outputs airflow toward the dissipation fin set to remove the heat from it. The centrifugal fan includes a centrifugal impeller mounted on a motor. An outer housing houses the motor and the centrifugal impeller. An inner wall of the housing's outlet has hair structure to reduce noise. The dissipation fin set includes a fin structure closely attached to a heat source, as well as an airflow channel housing. The airflow channel also includes a hair structure for reducing noise.

Abstract: An extended fin array has a main heat-dissipation module and an extended heat-dissipation module. The main heat-dissipation module and the extended heat-dissipation module are stacked to increase the effective convective area to increase the heat-dissipation effect. The extended heat-dissipation module is in the main heat-dissipation module when the heat amount generated by an electronic device is normal. The extended heat-dissipation module extends out from the main heat-dissipation module to increase the heat convection area when the heat amount generated by the electronic device is large.

Abstract: A centrifugal fan is described. The centrifugal fan is suitable for a portable electrical apparatus. A tongue shape is formed from a volute sidewall of a casing of the centrifugal fan and non-parallel to a rotational axis of blades. Therefore, when the blades rotate to generate a wake flow to blow on a surface of the volute sidewall at the tongue shape, noise generated by the centrifugal fan can be decreased.

Abstract: A heat-dissipating structure. The heat-dissipating structure comprises a plurality of first and second conductive plates. Each first conductive plate has a first base surface, a first reference surface and a first disturbing portion disposed on the first base surface and the first reference surface, and each second conductive plate has a second base surface, a second reference surface and a second disturbing portion disposed on the second base surface and the second reference surface. A middle passage, formed between two adjacent first and second conductive plates by facing the second base surface of the second conductive plate to the first reference surface of the first conductive plate, provides airflow passing therethrough with uniform flow resistance.

Abstract: A heat-dissipating module, a fan structure and an impeller. The heat-dissipating module comprises a fan structure providing the impeller to expel heat from a heat source. The impeller comprises a main body and a plurality of blade units. The main body has abase surface, and the blade units extending from the base surface of the main body. Each blade unit comprises a blade surface and a plurality of guiding portions disposed on the blade surface. The pattern of the guiding portions can be linear, curved, parallel or symmetrical, indented on or protruded from the blade units.

Abstract: A heat dissipation device is described. The heat dissipation device is suitable for electrical equipment, and particularly for a notebook computer. The heat dissipation device has a cooling fan and a plurality of heat dissipation fins. The heat dissipation fins are disposed at an outlet of the cooling fan to exhaust heat on the heat dissipation fins with airflow generated by the cooling fan. Each of spaces between the adjacent heat dissipation fins is determined so as to make the airflow velocity uniform. A preferred predetermined space is about C1×1/(V2?1), where V is an original airflow velocity at the adjacent heat dissipation fins and C1 is a coefficient.

Abstract: A phase transformation heat dissipation apparatus is described. The apparatus has a heat exchange device, a gaseous fluid transmission tube, a heat exchange chamber, a storage container and a liquid fluid transmission tube. The heat exchange device couples to a heat source to dissipate heat generated by the heat source with a fluid during a phase transformation thereof. A gaseous fluid is transferred to the heat exchange chamber by way of the gaseous fluid transmission tube and is condensed back into liquid fluid. The liquid fluid drops into the storage container and is utilized to remove the heat generated by the heat source again. The apparatus further has a capillary structure to provide the liquid fluid for the heat exchange device and furthermore has flexible tubes to connect the heat exchange chamber disposed in a liquid crystal display to the heat exchange device disposed in a notebook computer base.