Abstract: An electronic assembly (1) includes a top cover (21), a bottom cover (22) and a thermal module (10). The thermal module includes a centrifugal blower (14) and a fin assembly (12). The blower includes a top lid (142) defining a first air inlet (146) therein, a bottom plate (147) defining a second air inlet (150) therein, and a sidewall (148). An air outlet (149) is defined in the blower in front of the sidewall. A first distance (H1) formed between the top cover and the top lid is greater than a second distance (H2) formed between the bottom cover and the bottom plate. A left edge (154) of the second air inlet adjacent to the air outlet offsets a distance from a corresponding left edge (155) of the first air inlet inwardly toward a rotation axis (A) of an impeller (143) of the blower.

Abstract: A thermal module includes a blower, a fin unit and a heat pipe. The blower includes a housing and an impeller received in the housing. The housing defines an air inlet and an air outlet perpendicular to the air inlet. The fin unit is arranged at the air outlet of the blower. The heat pipe includes a tube defining a chamber, and a wick structure disposed in the chamber. The heat pipe forms an evaporation section and a condensation section attaching to the fin unit. At least one contacting member is depressed inwardly from the evaporation section of the heat pipe for accommodating an electronic component therein. A depth of the chamber at the at least one contacting member is less than that at other portion of the evaporation section of the heat pipe without the at least one contacting member.

Abstract: A fan includes a speed control circuit and a motor electrically connected with the speed control circuit. The speed control circuit includes an inputting circuit and a transforming circuit electrically connected with the inputting circuit. The inputting circuit supplies a constant current to the transforming circuit. The transforming circuit transforms the constant current to a fluctuating current and outputs the fluctuating current to the motor of the fan. The fluctuating current causes a rotation with a fluctuating speed to the motor of the fan.

Abstract: A thermal module includes a blower, a fin unit and a heat pipe. The blower includes a base, a cover, a sidewall between the base and the cover, and an impeller arranged among the base, the cover and the sidewall. An air outlet is defined in the sidewall of the blower. The fin unit is arranged at the air outlet. The heat pipe has a contacting plate integrally formed with one of the base and the cover of the blower. The contacting plate of the heat pipe includes a dissipating surface attaching to the fin unit, and an absorbing surface with different portions adapted for contacting with electronic components, wherein the different portions of the absorbing plate being at different levels.

Abstract: A centrifugal fan includes a housing and an impeller. The housing includes a base plate, a side plate extending upwardly from a periphery of the base plate and a concave portion depressed downwardly from a central portion of the base plate. The concave portion includes a bottom wall spaced from the base plate and a side wall interconnects with the base plate. An air inlet is defined in the bottom wall. The impeller includes a hub and a plurality of blades extending radially from the hub. The impeller is rotatably arranged on the bottom wall of the concave portion. A bottom face of each of the blades extends into the concave portion.

Abstract: An electronic assembly includes an enclosure including a top cover and a bottom cover, and a thermal module arranged between the top cover and the bottom cover of the enclosure. The thermal module includes a centrifugal blower and a fin assembly arranged in an air outlet of the centrifugal blower. The centrifugal blower includes a top lid defining a first air inlet therein, a bottom plate defining a second air inlet therein, a sidewall disposed between the top lid and the bottom plate, with the air outlet defined in the sidewall, and a rotor disposed in an inner space formed between the top lid, the bottom plate and the sidewall. The bottom plate is separated by a distance from the bottom cover of the enclosure. The bottom plate defines an indent therein so as to widen the distance.

Abstract: An electronic device includes a shell and a centrifugal fan. The shell includes a top wall, a bottom wall parallel to the top wall, and a sidewall perpendicular to the top wall and the bottom wall. The centrifugal fan is arranged between the top wall and the bottom wall. The centrifugal fan defines a first inlet facing the top wall and a second inlet facing the bottom wall. The first inlet and the second inlet are slantwise to the top wall and the bottom wall of the shell.

Abstract: A cooling fan includes a housing, a cover arranged on the housing, and an impeller received in a space formed between the housing and the cover. The impeller includes a hub and a plurality of blades extending radially and outwardly from the hub. Each of the blades includes a windward surface and a leeward surface opposite to the windward surface. A porous layer is disposed on the leeward surface of each of the blades, adjacent to a free end thereof. The porous layer has one side surface attached to the leeward surface and an opposite side surface facing the windward surface of an adjacent blade.

Abstract: A cooling fan includes a housing, a cover on the housing and an impeller received in a space between the housing and the cover. The housing includes a bottom wall and a sidewall projecting upwardly from an outer periphery of the bottom wall. The sidewall defines an air outlet therein. The impeller includes a hub and a plurality of blades extending radially out from the hub. A porous layer extends into the space between the housing and the cover from the sidewall at a location adjacent to the air outlet.

Abstract: A notebook computer includes a heat-generating component, a keyboard frame made of a heat conductive material and a heat pipe having an evaporator and a condenser. The evaporator of the heat pipe is in thermal communication with the heat-generating component and the condenser is attached to the keyboard frame and away from the heat-generating component.

Abstract: A centrifugal fan includes a top cover plate, a bottom plate, a sidewall and an impeller. The sidewall is defined with an air outlet. The impeller includes a hub and a plurality of blades extending radially outwardly from the hub. An air passage channel is defined between outmost free ends of the blades and an inner surface of the sidewall. A tongue is provided near the air outlet and protrudes inwardly and laterally from the inner surface of the sidewall towards the outmost free ends of the blades. The tongue has an outer surface facing the outmost free ends of the blades. A plurality of grooves is defined in the outer surface along a lengthwise direction of the tongue.

Abstract: A portable electronic device includes a housing receiving a heat generating electrical component therein, a display unit and a heat dissipating hinge pivotably interconnecting the housing and the display unit. The heat dissipating hinge includes a body, a cover, a first heat pipe and a second heat pipe. A body defines a first receiving groove receiving a condenser section of the second heat pipe therein. The cover and the body cooperatively define a receiving channel receiving the evaporator section of the first heat pipe therein. Heat generated by the electric device is transferred from the heat generating electronic component to the display unit through the heat dissipating hinge. First and second supporting members are secured to two ends of the evaporator section of the first heat pipe to prevent leakage of thermal grease from a middle portion of the receiving channel.

Abstract: A portable electronic device includes a casing, an electronic component disposed in the casing, and a thermal module for dissipating heat of the electronic component. The thermal module includes a heat pipe, a fin unit, and a transverse fan. The heat pipe includes an evaporating section thermally attached to the electronic component, and a condensing section thermally attached to the fin unit. The transverse fan is arranged in the casing for generating an airflow through the electronic component and the fin unit. The transverse fan includes a rotor, and a sidewall on a floor of the casing and surrounding the rotor. The sidewall defines an air inlet and an air outlet therein. The air outlet faces to the fin unit. The air inlet faces to the electronic component.

Abstract: A heat dissipation device includes a fin unit, a heat spreader and a heat isolation layer. The heat spreader contacts the fin unit and transfers heat to the fin unit for dissipation. The heat isolation layer is coated on an outer surface of the heat dissipation device. The heat isolation layer is polyurethane foam.

Abstract: A centrifugal fan includes a housing and a plurality of blades received in the housing. The housing includes a base wall and a sidewall surrounding the base wall. The sidewall defines a first air outlet and a second air outlet adjacent to the first air outlet. An elongated air guiding plate is located between the first air outlet and the second air outlet. The air guiding plate includes an outer end away from the blades and an inner end adjacent to the blades. A height of the inner end of the air guiding plate in an axial direction of the centrifugal fan is smaller than a height of the outer end of the air guiding plate.

Abstract: A centrifugal blower includes a housing (10), a cover (30) arranged on the housing, and an impeller (20) received in a space (25) formed between the housing and the cover. The housing includes a bottom wall (11) and a sidewall (12) surrounding the bottom wall. The sidewall defines an air outlet (121) therein. The sidewall and the impeller cooperatively define an air channel (24) therebetween. The cover includes a main body (31) and a tongue (32) extending from the main body. The tongue is a V-shaped flake and adjacent to the air outlet. The tongue extends into the air channel and protrudes toward the impeller.

Abstract: A heat dissipation device includes a fin unit, a fan and a fan duct. The fin unit includes a plurality of fins stacked together. An airflow channel is defined between each two neighboring fins. The fan includes an air inlet and an opposite air outlet. The fan duct communicates the airflow channels of the fin unit and the fan. The fan duct includes a first flue connected to the air inlet of the fan and a second flue connected to the fin unit. The second flue includes a first side plate and a second side plate covering on two neighboring sides of the fin unit, respectively.

Abstract: A centrifugal fan includes a plurality of blades, a casing and a tongue. The casing includes a base plate perpendicular to a rotation axis of the blades and a sidewall extending upwardly from the base plate. The base plate and the sidewall cooperatively define a space for receiving the blades therein. The sidewall defines an opening in one side for functioning as an air outlet. An air channel is defined between outmost ends of the blades and the sidewall. The tongue is detachably mounted to one end of the sidewall adjacent to the air outlet. The tongue includes a guiding surface protruding towards the outmost ends of the blades. The tongues is provided for lowering a noise level of the centrifugal fan during operation.

Abstract: A centrifugal fan includes a casing and a fan cover located on the casing. The casing includes a sidewall defining at least one latching groove. A step is formed in the at least one latching groove. The fan cover includes at least one latching leg corresponding to the at least one latching groove. The at least one latching leg includes a locking portion. The locking portion includes a plurality of wedge-shaped hooks extending latarally and outwardly from the locking portion. The hook has a tapered outer surface for guiding the at least one latching leg to slide into the at least one latching groove and a locking shoulder formed at a topmost portion of the hook. The locking shoulder of the at least one latching leg abuts against the step of the at least one latching groove.

Abstract: A notebook computer (1000) includes a base (100), a cover (300), a computer printed circuit board (PCB) (200) and a centrifugal fan (40). The cover covers the base, and cooperates with the base to form a receiving space (500) therebetween. The computer PCB is received in the receiving space and mounted on the base. The centrifugal fan is received in the receiving space, and includes a stator (401) and an impeller (402), rotatable with respect to the stator. The stator includes a motor (415) and a fan PCB (405) directly attached to the base. The motor electrically connects to the fan PCB. When the impeller rotates, airflow enters the receiving space through top and bottom air inlets (304, 104). The fan PCB is integrally formed with the computer PCB and has a height less than the computer PCB.