摘要:
A system for cooling a heat generating device comprises a heat sink and a plurality of ion emitter elements that form an electrohydrodynamic (EHD) air flow device. The heat sink has a base disposed in thermal communication with a heat generating device, such as a processor. A plurality of heat sink fins is coupled to electrical ground to form ion collectors. Ion emitter elements are disposed in a non-planar pattern along first ends of the plurality of fins so that each ion emitter element is equidistant from the first end of a nearest fin. A power supply applies an electrical potential between the plurality of ion emitter elements and the plurality of fins to induce a flow of ions that cause airflow across the heat sink. It is preferable to have at least three ion emitter elements that are equidistant from each fin of the heat sink.
摘要:
A system for cooling a heat generating device comprises a heat sink and a plurality of ion emitter elements that form an electrohydrodynamic (EHD) air flow device. The heat sink has a base disposed in thermal communication with a heat generating device, such as a processor. A plurality of heat sink fins is coupled to electrical ground to form ion collectors. Ion emitter elements are disposed in a non-planar pattern along first ends of the plurality of fins so that each ion emitter element is equidistant from the first end of a nearest fin. A power supply applies an electrical potential between the plurality of ion emitter elements and the plurality of fins to induce a flow of ions that cause airflow across the heat sink. It is preferable to have at least three ion emitter elements that are equidistant from each fin of the heat sink.
摘要:
An air moving apparatus includes an axial fan and an electrostatic device. The axial fan has a rotatable shaft defining a central axis of the axial fan, a plurality of blades secured to the shaft, and an air inlet opening. The electrostatic device is disposed immediately upstream of the air inlet opening of the axial fan, and includes a collector and an emitter. In one embodiment, the electrostatic device includes a cylindrical collector coupled to ground and has a central axis aligned with the central axis of the axial fan. The electrostatic device further includes a plurality of emitter wires coupled to a terminal of a direct current source and extending lengthwise within the cylindrical collector. During operation of the axial fan, the application of an electrical potential between an emitter and a collector causes ionic air movement radially outwardly away from a central axis of the axial fan.
摘要:
Airflow in a computer chassis may be enhanced or reduced to affect cooling of heat generating devices using an ionic air moving device. A plurality of ionic air moving devices enhance or reduce airflow through a plurality of fluidically parallel airflow zones of the computer chassis in an airflow direction established by a nonionic air moving device. Each ionic air moving device comprises an ion emitter electrode disposed a spaced distance from a collector electrode, wherein a controller independently controls an electrical potential between the emitter and collector electrodes of each ionic air moving device for affecting the rate of airflow through one or more of the plurality of airflow zones.
摘要:
An air moving apparatus comprises an axial fan and an electrostatic device. The axial fan has a rotatable shaft defining a central axis of the axial fan, a plurality of blades secured to the shaft, and an air inlet opening. The electrostatic device is disposed immediately upstream of the air inlet opening of the axial fan, and includes a collector and an emitter. In one embodiment, the electrostatic device comprises a cylindrical collector coupled to ground and has a central axis aligned with the central axis of the axial fan, wherein the cylindrical collector has an inner diameter that is substantially the same as the diameter of an air inlet opening to the axial fan. The electrostatic device further comprises a plurality of emitter wires coupled to a terminal of a direct current source and extending lengthwise within the cylindrical collector. The axial fan moves air longitudinally through an air inlet opening of the axial fan, and, during operation of the axial fan, the application of an electrical potential between an emitter and a collector causes ionic air movement radially outwardly away from a central axis of the axial fan.
摘要:
Airflow in a computer chassis may be enhanced or reduced to affect cooling of heat generating devices using an ionic air moving device. A plurality of ionic air moving devices enhance or reduce airflow through a plurality of fluidically parallel airflow zones of the computer chassis in an airflow direction established by a nonionic air moving device. Each ionic air moving device comprises an ion emitter electrode disposed a spaced distance from a collector electrode, wherein a controller independently controls an electrical potential between the emitter and collector electrodes of each ionic air moving device for affecting the rate of airflow through one or more of the plurality of airflow zones.
摘要:
A cold plate comprises a cold plate body having a base for thermally engaging a heat-generating device, a plurality of internal channels extending through the cold plate body for the passage of a liquid coolant, a first region between the base and the plurality of internal channels, and a second region between the plurality of internal channels and a top that is generally opposite the base from the plurality of internal channels. The cold plate body is made from a first thermally conductive material. The cold plate also comprises at least one thermally conductive member extending around the plurality of channels from the first region below the plurality of channels to the second region above the plurality of channels. The at least one thermally conductive member has a greater thermal conductivity than the first thermally conductive material to move heat from the first region to the second region.
摘要:
A liquid-cooled computer memory system includes first and second blocks in fluid communication with a chilled liquid source. A plurality of spaced-apart heat transfer pipes extend along a system board between memory module sockets from the first manifold block to the second manifold block. The heat transfer pipes may be liquid flow pipes circulating the chilled liquid between the memory module sockets. Alternatively, the heat transfer pipes may be closed heat pipes that conduct heat from the memory modules to the liquid-cooled blocks. A separate heat spreader is provided to thermally bridge each memory module to the adjacent heat transfer pipes.
摘要:
A cooling system for a memory module comprises a heat conduction assembly for conducting heat from the memory module to liquid-cooled mounting blocks. In one embodiment, each heat conduction assembly includes a frame having opposing first and second supports, first and second heat spreader plates each extending from the first support to the second support, and a pair of flattened heat pipes each extending along a respective one of the heat spreader plates from the first support to the second support. The liquid-cooled mounting blocks releasably support the heat conduction assembly over a memory module socket with the memory module between the heat spreader plates.
摘要:
A cooling system for a memory module comprises a heat conduction assembly for conducting heat from the memory module to liquid-cooled mounting blocks. In one embodiment, each heat conduction assembly includes a frame having opposing first and second supports, first and second heat spreader plates each extending from the first support to the second support, and a pair of flattened heat pipes each extending along a respective one of the heat spreader plates from the first support to the second support. The liquid-cooled mounting blocks releasably support the heat conduction assembly over a memory module socket with the memory module between the heat spreader plates.