Abstract: A thermal module includes a centrifugal blower (10), a heat sink (20) mounted to an air outlet (11) of the centrifugal blower, a heat pipe (40) connecting the heat sink with a heat generating electronic component, and a resilient clip (80) for mounting the heat pipe onto the heat generating electronic component. The resilient clip includes an M-shaped pressing portion (82) disposed above an evaporation section (44) of the heat pipe, a plate portion (83) disposed at one end of the pressing portion for being fixed to a sidewall (53d), and an abutting portion (85) disposed at the other end of the pressing portion and including an abutting plate (85b) for abutting against a bottom surface of another sidewall (53b).

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: An exemplary structure includes a first body, a second body and a screw. The screw includes a head and an elongated pole extending from the head. Plural external threads are formed on the pole. The first body defines a through hole with a diameter not smaller than the major diameter of the external threads. The second body defining a latching hole comprising a first portion adjacent to the first body and a second portion farthest away the first body. Plural internal threads matching the external threads are formed on the second body around the first portion. A diameter of the second portion is larger than the major diameter of the external threads. The pole extends through the through hole and threadedly engaged with the internal threads. A free end of the pole farthest away the head is received in the second portion and apart from the second body.

Abstract: An exemplary heat sink includes elongated fins stacked together. Each of the fins includes a first dissipating portion and a second dissipating portion arranged in turn along a longitudinal axis of the fin. The first dissipating portion and the second dissipating portion of each fin are offset from each other along a stacked axis of the fins. An opening is defined in each fin between the first dissipating portion and the second dissipating portion thereof.

Abstract: An exemplary electronic device includes a circuit board defining apertures therein, an electronic component arranged on the circuit board and surrounded by the apertures, a heat spreader arranged on the electronic component, and a latching mechanism fixing the heat spreader to the electronic component. The latching mechanism includes latching arms extending outwards from the heat spreader and elastic poles. Each latching arm defines a latching hole aligned with one of the apertures of the circuit board. The poles respectively extend through the apertures and the latching holes in turn. Each pole includes a main body engaged in the corresponding latching hole and a head resiliently abutting against the latching arm.

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: A cooling fan (20) includes a housing (22) and an impeller (24). The housing has a base (221), a sidewall (222) extending from a periphery of the base with an air outlet (226) defined therein, and a cap (223) covering the sidewall. The impeller has a plurality of blades (242) rotatably received in the housing for generating an airflow. An air channel (225) is formed between tip portions of the blades and an inner face of the sidewall. The air outlet has a near section (226A) and a far section (226C). The airflow first reaches the near section and then the far section. The base of the housing has a protrusion (227) extending into the air outlet for guiding the airflow flowing towards the far section from the near section of the air outlet.

Abstract: A centrifugal fan includes a fan frame (20) and an impeller (40) received in the fan frame. The impeller includes a hub (41) having a circular top wall (410) and a cylindrical side wall (412) extending downwardly from a rim of the circular top wall, a plurality of blades (42) extending radially from the side wall of the hub and a blade ring (44). The blade ring includes an annular top plate (441), a cylindrical sidewall (442) extending downwardly from an outer periphery of the top plate, and a flange (443) extending outwardly from a bottom of the cylindrical sidewall. The blade ring is arranged on top surfaces of the blades received in an air inlet (24a) defined in a top surface of the fan frame, and the top plate of the blade ring and the top surface of the fan frame are coplanar with each other.

Abstract: An impeller (10) for a cooling fan includes a hub (20) having a circular wall (22) and an annular sidewall (24) extending downwardly from a rim of the circular wall, and a plurality of blades (30) extending radially from the sidewall of the hub. Each of the blades includes a first portion (32) near the hub and a second portion (34) away from the hub, wherein each of the first portions is identical to an adjacent one of the first portions, and each of the second portions is different from an adjacent one of the second portions regarding a height thereof, thereby reducing a noise level of the impeller when the it operates.

Abstract: A heat dissipation device includes a cooling fan (15) defining an air inlet and an air outlet (157) oriented perpendicular to the air inlet; a metal foam (11) is arranged in the air outlet of the cooling fan, and a heat pipe (13) has a condensing end (131) being thermally attached to the metal foam. The metal foam forms numerous open cells (118). A plurality of guiding holes (116) are defined in the metal foam facing to a rotor (153) of the cooling fan for an airflow generated by the cooling fan to flow therethrough. The guiding hole (116) has a size larger that that of the open cell (118). The guiding hole has an outer end opened to an outside of the cooling fan (15).

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 thermal module (100) includes a centrifugal blower (20), a heat dissipater (10) and a plurality of heat transfer plates (34). The centrifugal blower includes a casing (22), a stator accommodated in the casing, and a rotor (24) rotatably disposed around the stator. The casing includes a base wall (224) and a sidewall (222) surrounding the base wall. The sidewall defines an air outlet (221) in front of the rotor. The heat dissipater is made of porous material and disposed at the air outlet of the centrifugal blower. The heat transfer plates extend into the heat dissipater so as to increase heat transfer efficiency between a heat generating electronic component and the heat dissipater.

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 main body and a centrifugal fan. The main body includes a bottom wall, an opposite top wall and a side wall connecting the top wall with the bottom wall. The bottom wall, the top wall and the side wall cooperatively define a space in the main body. A groove is defined in the top wall for communicating the space with an outside environment of the main body. The top wall is provided with an active cover plate corresponding to the groove. The cover plate is capable of moving upwardly relative to the top wall to define an air intake between the cover plate and the top wall. A centrifugal fan is received in the space of the main body. The centrifugal fan sucks air into the space from the outside environment via the air intake and the groove.

Abstract: An electronic device includes a casing and a centrifugal blower. The casing includes a bottom cover and a top cover. A sidewall extends from the bottom cover towards the top cover. The centrifugal blower is surrounded by the sidewall and includes a supporting member mounted to the bottom cover, and an impeller rotatablely supported by the supporting member. The impeller includes a hub and a plurality of blades extending outwardly from the hub. Outer portions of the blades extend beyond the supporting member along a radial direction of the hub. Inner portions of the blades have a height gradually increasing along an outward direction. The outer portions have a height equal to a maximum height of the inner portions. Bottom faces of the outer portions of the blades are located below a top surface of a base plate of the supporting member.

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 heat dissipation device includes a chamber, a tube, a wick structure and a plurality of fins arranged around the tube. The chamber includes a base and a cover hermetically connected to the base. An evaporation room is defined between the base and the cover of the chamber. The tube extends upwardly from the cover of the chamber, and defines a condensation room communicating with the evaporation room. The wick structure is immerged with working fluid, and includes a main portion disposed in the evaporation room and a projection extending from the main portion into the condensation room.

Abstract: A heat dissipation apparatus (10) includes a centrifugal blower (12) and a fin assembly (11) having a plurality of fins (111) disposed at an air outlet (129) of the centrifugal blower. The centrifugal blower includes a first tongue (130) distant from the fin assembly, and a second tongue (131) located between the first tongue and the air outlet of the blower. The second tongue has an end (132) substantially parallel to the fins of the fin assembly to guide an airflow smoothly flowing through the fins.

Abstract: A heat dissipation device includes a heat sink (10) and a blower (50) for generating an airflow to the heat sink. The blower includes a housing (60) and at least one plate (63a, 63b) extending outwardly from the housing. The housing forms a contacting surface (610, 620) abutting a side of the heat sink. The plate includes an inner surface (630) abutting another side of the heat sink. A groove (69) is defined in a junction of the housing and the plate, and thus the contacting surface of the housing and the inner surface of the plate are planar-shaped to avoid interference between the housing of the blower and the heat sink. The groove has chamfer angles R therein. The housing is made by plastic injection molding or die casting.

Abstract: A heat pipe includes a casing and a three-dimensional cross-linkage wick structure received in the casing. The three-dimensional cross-linkage wick structure has a plurality of pores therein for providing a capillary action and includes a bottom layer being attached to the casing and a plurality of protrusions extending from the bottom layer and spaced from each other. A groove is defined between two adjacent protrusions. The bottom layer has a connecting portion under the groove. The connection portion is formed between and connects with the two adjacent protrusions. The connection portions have a smaller pore size than the protrusions.