Abstract: A group of powders (40) for making a wick structure of a heat pipe includes main powders (50) and supplemental powders (60). The melting point of the supplemental powder is lower than that of the main powder. During a sintering process, the powders are filled in a casing of the heat pipe and have a eutectic reaction between the main powders and the supplemental powders to form the wick structure. The temperature for the eutectic reaction is lower than the melting temperature of the supplemental powders.

Abstract: A method for sealing a heat pipe, includes the steps of: providing a metallic pipe with an end sealed and an opposite open portion; pressing the open portion of the pipe to form a two layer portion by using two pairs of pressing molds; welding an end part of the two layer portion to form a sealing structure, during which at least one pair of pressing molds continues pressing the two layer portion; and moving the at least one pair of pressing molds away from the sealing structure.

Abstract: A powder feeding apparatus of manufacturing a heat pipe includes a vibration tray having a supporting board and a plurality of pipes positioned in the supporting board of the tray. A mandrel is coaxially inserted in each of the pipes. A feeder is located corresponding to an end of each pipe for feeding powder into the pipe. A vibration source is located under the tray to drive the tray to vibrate with substantially a same amplitude in a vibration direction when feeding the powder into the pipes from the feeder.

Abstract: An electric fan includes a frame (10) having a central tube (12) extending therefrom, a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by the bearing. The frame defines an air inlet (19) and an air outlet (17) at two different sides thereof. The stator includes a stator core (52) having a central cylinder (520). A plurality of radial posts (522) extends from the central cylinder. A plurality of magnetic poles (524) is formed at free ends of the posts. A plurality of stator coils (54) is wound around the posts. Each magnetic pole includes a lower portion (700) adjacent to the air outlet and an upper portion (60) adjacent to the air inlet. The upper portions expand radially along a direction from the air inlet to the air outlet.

Abstract: A powder feeding apparatus and a method of manufacturing a heat pipe are disclosed. The method includes: a) proving the powder feeding apparatus including a vibrating tray and a pump (800); b) positioning a tube in the vibrating tray; c) inserting a mandrel (400) into the tube from a first open end of the tube, wherein at least one groove (410) is defined in an end of the mandrel corresponding to a second open end of the tube; d) positioning a feeder (300) on the first end of the tube; e) driving the vibrating tray to vibrate and feeding powder into the tube from the feeder whilst the pump is operating to generate a forced airflow flowing from the first to the second open end of the tube. By using this method, bridging of the powder is prevented.

Abstract: A heat dissipation device includes a chip unit and a heat dissipation unit thermally attached to the chip unit. The chip unit includes a carrier substrate and a chip in electrical contact with the carrier substrate. The heat dissipation unit includes a heat spreader thermally contacting with the chip and a heat dissipation member coupled to the heat spreader. The heat spreader and the heat dissipation member are integrated together before they are attached to the chip unit.

Abstract: A method (100) and an apparatus for manufacturing a heat-dissipation device (10) with a vacuum chamber and a working fluid therein are disclosed. The method includes the following steps: vacuuming a hollow metal casing (12) through a first open end (121) thereof until an interior of the casing reaches a predetermined vacuum degree; sealing the first open end; filling a predetermined quantity of working fluid into the casing through a second open end (123) thereof; and sealing the second open end. The apparatus includes a vacuum pump, a liquid-storage tank and a set of processing device, as used respectively for the above vacuuming, liquid-filling and sealing steps. By this apparatus, the heat-dissipation device can be manufactured at a same place without the requirement to shift the casing from one place to another place during the manufacture of the heat-dissipation device.

Abstract: A method of manufacturing a heat pipe, including the steps of: providing a hollow body with an open end and an opposite close end; filling a predetermined quantity of working fluid into the hollow body through the open end thereof after an interior of the hollow body having been evacuated to a predetermined vacuum degree; and sealing the open end of the hollow body.

Abstract: A method (100) of filling and sealing a predetermined quantity of working fluid within a hollow metal casing (11) of a heat-dissipating device such as a heat pipe (10) or a vapor chamber-based heat spreader includes the following steps: (1) filling a working fluid (16) into the hollow metal casing through an open end (12) thereof until the hollow metal casing is full of the working fluid; (2) pumping a portion of the working fluid out of the hollow metal casing until the predetermined quantity of working fluid is left in the hollow metal casing; and (3) sealing the open end of the hollow metal casing. By this method, a vacuum condition is accordingly formed inside the heat pipe due to removal of the portion of the working fluid from the heat pipe and the air contained in the heat pipe is effectively removed.

Abstract: A method (100) of producing a heat pipe includes the following steps: (1) inserting a mandrel (10) into a hollow metal casing (20) with a space formed between the hollow metal casing and the mandrel; (2) filling into the space with a slurry (40) comprised of powders; (3) solidifying the slurry in the space; (4) drawing the mandrel out of the hollow metal casing after the slurry is solidified; and (5) sintering the powders contained in the slurry to form the heat pipe (60) with a sintered powder wick (61) arranged therein. In the sintering step of the method, no mandrel is required. Thus, the problem that the mandrel is difficult to be drawn out of the hollow metal casing as suffered in the conventional art is effectively solved.

Abstract: A heat pipe (50) and a method (100) of producing the heat pipe are disclosed. The method includes the following steps: (1) inserting a mandrel (10) into a hollow metal casing (20) with a porous structure (30) combined to an outer surface of the mandrel; (2) filling powders (40) into a space formed between the hollow metal casing and the porous structure; (3) sintering the filled powders; (4) drawing the mandrel out of the hollow metal casing; and (5) sealing the hollow metal casing with a working fluid filled therein. The heat pipe produced by this method includes a composite wick structure (60) arranged in the hollow metal casing. By using this method, the mandrel can be easily drawn out of the hollow metal casing after the filled powders are sintered.

Abstract: An integrated liquid cooling system (100) includes a heat absorbing member (10), a heat dissipating member (20) and a pump (15). The heat absorbing member defines therein a fluid flow channel (115) for passage of a coolant. The heat dissipating member is mounted to and maintained in fluid communication with the heat absorbing member. The pump is received in the heat dissipating member and is maintained in fluid communication with the heat absorbing member and the heat dissipating member. The pump is configured for driving the coolant to circulate through the heat absorbing member and the heat dissipating member. The components (i.e., the heat absorbing member, the heat dissipating member and the pump) of the liquid cooling system are combined together to form an integrated structure without utilizing any separate connecting pipes.

Abstract: An integrated liquid cooling system (100) includes a heat absorbing member (10), a heat dissipating member (20) and a pump (15). The heat absorbing member defines therein a fluid flow channel (115) for passage of a coolant and a pump receiving housing (120) adjacent to the fluid flow channel. The heat dissipating member is mounted to and maintained in fluid communication with the heat absorbing member. The pump is received in the pump receiving housing of the heat absorbing member. The pump is configured for driving the coolant to circulate through the heat absorbing member and the heat dissipating member. The heat absorbing member, the heat dissipating member and the pump of the liquid cooling system are combined together to form an integrated structure without utilizing any connecting pipes.

Abstract: An integrated liquid cooling system (100) includes a pump (10), a mounting base (15), a heat dissipating member (20). The mounting base defines therein a through hole (151). The heat dissipating member is mounted to and maintained in fluid communication with the mounting base. The pump is received in the through hole of the mounting base. The pump has a bottom plate for thermally contacting a heat generating component and is configured for driving a coolant to circulate through the mounting base and the heat dissipating member. The pump, the mounting base and the heat dissipating member of the liquid cooling system are combined together to form an integrated and compact structure without utilizing any connecting pipes or fittings.

Abstract: A electrical fan includes a frame (10) having a central tube (11), a bearing (30) received in the central tube, a stator (50) mounted around the central tube, and a rotor (70) being rotatably supported by a bearing in the stator. The frame defines an air inlet (19) and an air outlet (17) at two different sides thereof. The stator and the rotor expand radially along a direction from the air inlet to the air outlet. Fan blades (75) extend radially from the rotor. A hub (71) of the rotor has a streamline shaped outer surface. A stator core (511) of the stator is made by powder sintering technology.

Abstract: A cooling fan includes a fan frame (10) having a central tube (12) defining a central hole (120) therein, a bearing (30) received in the central hole and a rotor (20) being rotatable with respect to the stator. The rotor includes a rotary shaft (24). A top end (240) of the shaft connects to a fan blade set. A free bottom end (242) of the shaft extends through the bearing into the central hole. A counter plate (40) made of high abrasion resistant material is located to face and supportively engage the free bottom end of the rotary shaft. A damping spring (70) exerts a force resiliently urging the counter plate against the free bottom end of the rotary shaft. The damping structure is capable of providing a cushion to a collision between the shaft and the bearing.

Abstract: A heat exchange module (1) includes a fan duct, an evaporator (22), a condenser (26) and an electric fan (50). The fan duct includes a lower portion (10) and an upper portion (30). The lower portion cooperates with the upper portion to define therebetween an air passage (90). The evaporator contains therein a working fluid. The condenser is in fluid communication with the evaporator. The evaporator and the condenser are received in the air passage defined by the fan duct. The working fluid turns into vapor in the evaporator upon receiving heat from a heat-generating component (70) and the vapor turns into condensate upon releasing the heat to the condenser. The electric fan is attached to the fan duct. The electric fan produces an airflow flowing through the air passage for removing the heat away from the condenser.

Abstract: A loop-type heat exchange module (10) is disclosed, which includes an evaporator (11), a vapor conduit (12), a condenser (13), a liquid conduit (14), a cooling fan (16), a fastening seat (151) and a fan cover (152). The evaporator contains therein a working fluid. The working fluid evaporates into vapor after absorbing heat in the evaporator, and the generated vapor flows, via the vapor conduit, to the condenser where the vapor releases the heat and is condensed into condensate. The condensate then returns back, via the liquid conduit, to the evaporator to thereby form a heat transfer loop. The cooling fan is applied to produce a forced airflow towards the condenser. The fastening seat is used for fastening the evaporator to have an intimate contact with a heat-generating electronic component. The fan cover extends from one side of the fastening seat and receives the cooling fan and the condenser therein.

Abstract: A loop-type heat exchange device (10) is disclosed, which includes an evaporator (20), a condenser (40), a vapor conduit (30) and a liquid conduit (50). The evaporator defines therein a chamber for containing a working fluid. The chamber is divided into an evaporating region and a micro-channel region. The working fluid in the evaporator evaporates into vapor after absorbing heat at the evaporating region, and the generated vapor flows, via the vapor conduit, to the condenser where the vapor releases its latent heat of evaporation and is condensed into condensate. The condensate then returns back, via the liquid conduit, to the evaporator to thereby form a heat transfer loop. The evaporator is configured in such a manner that an amount of vapor to be formed and accumulated in the micro-channel region can be minimized.

Abstract: A heat exchange module (1) is disclosed, which includes an evaporator (20), a condenser (50) and a heat sink (22). The evaporator defines therein a chamber for containing a wick structure (20c) saturated with a working fluid. The wick structure occupies a portion of the chamber. The condenser is disposed adjacent to the evaporator, wherein the working fluid turns into vapor in the evaporator after absorbing heat of a heat-generating component and the vapor turns into condensate at the condenser after releasing the heat. The heat sink is attached to an outer surface of the evaporator and located in alignment with the wick structure contained in the evaporator.