摘要:
The compression air seal for containing air between equipment racks and electronic modules is described incorporating a metal base having a slot opening and an inclined or tapered upper surface with respect to the lower surface, a double layer of elastomeric material having two hardness values one upon the other in enclosing the opening and a coating of low-friction material over the upper elastomeric material to facilitate low friction when an electronic module having a tapered surface is slid over and compresses the seal.
摘要:
A sealed extensible bellows containing freon and a flexible wick provide a heat pipe, and fixed end of which is attached to a heat sink (a cold body), the other movable end of the bellows carries a thermally conductive plate that moves from a nonengaging relationship to an engaging relationship with a temperature regulated surface at a predetermined temperature of the cold body.
摘要:
The invention is a thermal coupling to promote heat transfer between a heat source and a heat sink with abutting surfaces using a deposition of a thermally conductive substance having a melting point temperature less than the temperature of the heat source such that the substance when heated will be in a liquid state capable of effectively transferring heat between the heat source and the heat sink. The deposition is situated between and contacts the abutting surfaces of the heat source and the heat sink. The substance is contained using a sealant to completely enclose the substance between the heat source and heat sink surface while an adhesive is used to secure the heat source to the heat sink.
摘要:
The invention is a cooling apparatus for electronically steered phased array antennas in radar systems. The apparatus includes a rigid tube, used in multiplicity with a series of identical apparatus, located adjacent to the transmitter/receiver modules in the antenna and having a plurality of longitudinal slots. Flexible hoses are inserted into the tubes so that when a liquid coolant is introduced under pressure into the hoses, the fluid pressure will be sufficient to cause expansion of the flexible hose material enough so the material expands outward through the slots in the tubes and becomes flush against the side of the transmitter/receiver modules, thereby maximizing heat transfer between the modules and the liquid coolant.
摘要:
An apparatus is provided for cooling electronic components mounted on a cuit board. The circuit board is placed in thermal contact with a heat sink enclosure that has an interior cavity and a release opening that provides a path from the interior cavity to the external ambient. A meltable pellet blocks the release opening. A wick is bonded to the inside surface of the interior cavity. The device is sealed with a working fluid that permeates the wick. When the components get hot, the heat is transferred through the heat sink enclosure to the working fluid in the wick, causing the working fluid to vaporize. The vapors remain trapped in the interior cavity until the pellet melts, allowing the vapor to be released and the temperature of the heat sink enclosure to be stabilized or lowered.
摘要:
A direct air cooling system 12 for electronics carried by aircraft. The cooling system provides a submerged air scoop 16 which directs outside air to several electronic modules 14. The air flows through passages 76 in the modules 14 which are adjacent to circuit boards 74, 78 bearing discrete electronic components 88. A foil layer 86 and aluminum fin stock help transfer heat from the electronic components to the directed air. Heated air is then exhausted through exhaust port 24 or 28.
摘要:
A dual mode heat exchanger 10 for cooling airborne electronics 12 through a cold plate 14. The heat exchanger either radiates heat to air through radiator fins 18 or absorbs heat by evaporative cooling. A liquid coolant contained in grooves 16 of the cold plate 14 boils at a preselected temperature and thereby absorbs heat energy. Vapor released by the boiling liquid is exhausted through a hydrophobic filter membrane 24.
摘要:
An electric vehicle propulsion system having a motor with first and second electrically isolated windings and a system control unit for controlling the motor, wherein the system control unit includes a first power bridge for driving the first windings and a second power bridge for driving the second windings.
摘要:
A device for positioning within the interior of a conduit for enhancing heat transfer between the conduit and an enclosed flowing coolant fluid comprised of a longitudinal member having a plurality of protuberances for generating turbulent flow within the conduit with the longitudinal member being resiliently secured within the conduit such that the force of the fluid flow will not displace the member.Design of the device is such that installation or removal from a tube may be easily accomplished by merely sliding the device in or out of the tube.
摘要:
An attitude independent, evaporative cooling system used in airborne systems for cooling electronic components. The coolant is water contained within ducts in heat transfer relationship with the electronic components. The ducts are sealed to water passage by porous membranes which permit passage of steam into a manifold which is sealed by a normally closed pressure relief valve. The relief valve is operable at a selected steam pressure which corresponds to the desired maximum operating temperature for the electronic components.