摘要:
A method for manufacturing a bearing device includes steps: providing a hollow mold, then injecting a feedstock of powder and molten binder into the mold under pressure, thus forming a desired perform of a cylindrical body and a desired perform of a cover; separating the binder from the desired perform of the body and the desired perform of the cover; sintering the desired perform of the body and the desired perform of the cover, thereby forming the body and the cover; and mounting the cover on the body, thereby forming the bearing device.
摘要:
A bearing device includes a cylindrical body. The body defines an axial hole for rotatably receiving a rotatable member therein. The body defines a guiding groove at a side wall thereof. The guiding groove has a bottom end communicating a bottom of the axial hole and a top end at the body. The body defines a bore in a middle portion thereof to communicate the axial hole and the top end of the guiding groove, whereby lubricant can flow in a loop in the body.
摘要:
An exemplary injection molding apparatus includes a first mold defining a passage therein, a second mold engaging with the first mold, working fluid received in the passage of the first mold, and a thermal conductive member engaged in the first mold and thermally interconnecting the first mold and the working fluid. The first mold and the second mold cooperatively define a molding chamber therebetween adapted to receive injected molten material therein. The thermal conductive member transfers heat from the first and second molds to the working fluid when the first and second molds are hotter than the working fluid, and transfers heat from the working fluid to the first and second molds when the working fluid is hotter than the first and second molds.
摘要:
A method for manufacturing a casing of a heat pipe includes steps: providing a hollow mold; injecting a feedstock of powder and molten binder into the mold under pressure, thus forming a desired body of a first shell and a desired body of a second shell; separating the binder from the body of the first shell and the body of the second; sintering the body of the first shell and the body of the second shell, thereby forming the first shell and the second shell; and mounting the second shell on the first shell and sintering the first shell and the second shell together, thereby forming the casing of the heat pipe.
摘要:
A flat heat pipe includes a casing, a wick structure received in the casing, and a working medium contained in the casing and saturated in the wick structure. The casing has an upper plate and a bottom plate opposite to the upper plate. The wick structure is attached only to the bottom plate of the casing. The wick structure spaces from the upper plate with a vapor channel defined between the upper plate and the wick structure.
摘要:
An exemplary method of manufacturing a heat dissipation device includes, firstly, providing a heat pipe including a condenser section having a planar outer surface, and providing a heat sink including a supporting surface defining a guiding line. The guiding line has a width smaller than a width of the outer surface of the condenser section. Next, an amount solder is spread on the supporting surface along the guiding line to form a solder layer on the supporting surface. The solder layer has a size not larger than a size of the outer surface of the condenser section. Then the outer surface of condenser section of the heat pipe is attached to the solder layer on the supporting surface of the heat sink.
摘要:
A thermal module comprises a cooling fan, a heat pipe and a fin assembly. The cooling fan defines an air outlet therein. The fin assembly is mounted at the air outlet of the cooling fan. The heat pipe comprises an evaporating section attached to the cooling fan and a condensing section attached to the fin assembly. The evaporating section of the heat pipe is wholly located within an inner space of the cooling fan.
摘要:
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.
摘要:
A heat dissipation device for cooling a heat generating component, includes a fins module, a heat pipe, a fan, at least two temperature sensors, and a control system. The heat pipe includes an evaporation section absorbing heat from the heat generating component, and a condensation section thermally connected to the fins module. The fan is for driving airflow towards the fins module. The at least two temperature sensors are arranged on the evaporation section of the heat pipe, for continuously sensing temperatures of their respective positions on the heat pipe. The control system adjusts the speed of the fan and/or the operating power of the heat generating component according to the sensed temperatures of the at least two temperature sensors. A method for controlling the heat dissipation device is also provided.
摘要:
An exemplary heat dissipation device for a portable electronic device includes a heat pipe and a heat dissipating member. The heat pipe includes an evaporator section and a condenser section. The evaporator section is attached to a heat source of the portable electronic device. The heat dissipating member includes a sheath, and a porous heat dissipating layer and a working fluid contained in the sheath. The porous heat dissipating layer defines gaps therein. The working fluid is filled in the gaps. The condenser section of the heat pipe is received in the porous heat dissipating layer and thermally contacts the porous heat dissipating layer.