Abstract:
A heat pipe is provided having a tubular enclosure with an internal surface, a working fluid disposed within the enclosure, and at least one fin projecting radially outwardly from an outer surface of the tubular enclosure. The tubular enclosure is sealed at one end by a base having a grooved sintered wick disposed on at least a portion of its internally facing surface. The grooved, sintered wick comprises a plurality of individual particles having an average diameter. The grooved wick includes at least two adjacent lands that are in fluid communication with one another through a particle layer disposed between said at least two adjacent lands that comprises less than about six average particle diameters.
Abstract:
A system for cooling electronic components includes a cold plate having a channel through which a fluid coolant is transported, a plurality of bosses each receiving an electronic, optical, or other heat-generating component, and a plurality of fin structures, at least three of which are adjacently disposed in a sequential order on the cold plate. Each fin structure contacts a boss, and has a fin inlet and a fin outlet in fluid communication with a section of the channel for supplying the area around the boss with coolant and cooling the component seated on the boss. A portion of the channel defines a serpentine path for transporting the fluid coolant to the at least three sequential fin structures in a non-sequential order. Sections of the channel in the serpentine path further transport the coolant in opposite directions, thus enhancing heat transfer and temperature equilibration across the cold plate. The system can further include a plurality of such cooling plates disposed in a vertical stack, and a manifold delivering coolant to the cooling plates. When the cooling plates are stacked, the flow rate and pressure drop across each plate is substantially uniform, thus providing a cold plate having a substantially isothermal surface across a portion of the cold plate.
Abstract:
An integrated circuit package (10). The package includes a substrate (12) that has a first internal conductive bus (72) and a second internal conductive bus (74) that are located on a common layer of the substrate and dedicated to different power voltage levels. The busses are coupled to external lands located on a first surface (14) of the package by vias (32) that extend through the substrate. The first and second busses are located on a common layer of the substrate. The package contains an integrated circuit (18) which is mounted to a heat slug (22) that is attached to a second surface of the package. The integrated circuit is coupled to bond fingers located on a shelf of the substrate. Some of the bond fingers (40) are connected to the internal busses by conductive strips (68) that wrap around the edges of the shelf. Some of the vias are connected to a whole group of external lands. Grouping the lands (34g) to a single via reduces the number of vias on the second surface of the package. The reduction in vias allows additional capacitors (28) to be mounted to the second surface of the package.
Abstract:
The circuit board apparatus (10) includes a first layer (12, 14), a second layer (12, 14) and an inner plate (19) disposed between the first layer (12, 14) and the second layer (12, 14). A fluid distributing conduit (38) is disposed in the inner plate (19). The fluid distributing conduit (38) has a first end (22), a central portion (24) defining a chamber, and a second end (26). A first electronic component (28) is disposed within the chamber (24). A nozzle (60) is disposed in the fluid distributing conduit (38). The nozzle (60) receives a fluid, atomizes the fluid and discharges the atomized fluid (70) into the chamber (24).
Abstract:
An apparatus and method for removing heat from a heat generating component located within a thin profile consumer electronic or computer system enclosure is disclosed. In one embodiment, the cooling system of the present invention includes an air duct comprising a thermally conductive housing (10) having internal fins dispersed along the internal walls of the duct. An air flow generator (16) produces an air flow that is directed from an inlet port (13) located at or near the center of the air duct to first and second exit ports (18, 20) located at opposite ends of the duct. A low resistance thermal path, such as a heat pipe, transfers heat from the heat generating component to the air duct housing.
Abstract:
An apparatus and method for removing heat from a heat generating component located within a thin-profile consumer electronic or computer system enclosure (120) is disclosed. In one embodiment the cooling system of the present invention includes an air duct (11) comprising a thermally conductive housing (12, 14) having internal fins (50, 52) dispersed along the internal walls of the duct. An air flow generator (16) produces an air flow that is directed from an inlet port (13) located at or near the center of the air duct to first and second exit ports (18, 20) located at opposite ends of the duct. A low resistance thermal path, such as a heat pipe, transfers heat from the heat generating component (80) to the air duct housing.
Abstract:
An apparatus for cooling the components within an enclosed computer system. The apparatus includes a first compartment (11) containing a power supply (17) and a fan (12), a second compartment (25) containing a variety of electrical components and an air duct (13) containing the computer system microprocessor (14). The air duct directs an air flow from the exterior of the computer system enclosure across the microprocessor to an inlet opening (29) of the first compartment. Holes are provided within the air duct at points downstream of the microprocessor to permit an air flow from the second compartment into the air duct. The fan generates an air stream through the cooling system and exhausts to the exterior of the computer system enclosure.
Abstract:
An enhanced fluid cooled finned heat sink (10) is provided wherein slots (22, 24, 26, 28) are formed in the leading edges of fins (12, 14) to disrupt and delay the formation of a thermally insulating fluid boundary layer (34) at the surface of the fins (12, 14).
Abstract:
A rack of electronic equipment is convection cooled. Each unit in the rack has oblique cooling fins oriented in a same direction, to cause heated air to flow to a hot air pathway by a chimney effect, and to draw surrounding air along a cool air pathway to each of the units. A preferred unit has two housing sections thermally insulated from each other. Each housing section has its cooling fins on a side surface, some of the fins being aligned with fins on the other section, so that cooling air flows first over the cooler section and then over the hotter section. The cooler section is arranged for enhanced heat transfer from a heat sensitive element, and heat liberating units are heat sinked to the hotter section.
Abstract:
A two-phase liquid cooling system for an electronic component comprised of flexible sealed bag which is partially filled with a liquid coolant. Sufficient residual non-condensing gas is maintained in the bag so that some of the gas dissolves in the liquid coolant when the device is not operating and at ambient temperature. During warm-up, the residual gas comes out of solution and creates nucleation sites that assist in initiating boiling. The bag is air and fluid-impermeable, and has sufficient flexibility such that as coolant vaporizes, the bag expands to maintain the internal bag pressure substantially the same as the ambient environmental pressure. The bag may also be provided with a metal heat spreader plate which passes through a wall of the bag and assists with transferring heat from the component to the coolant. The heat spreader plate may be specially treated to allow the flexible bag material to be directly heat sealed to the plate and to provide nucleation sites to enhance coolant boiling.