H - Electricity – 05 – K
Patent
H - Electricity
05
K
356/110
H05K 7/20 (2006.01)
Patent
CA 1282187
ABSTRACT OF THE DISCLOSURE LIQUID COOLING SYSTEM FOR INTEGRATED CIRCUITS A liquid cooled circuit module comprises an integrated circuit package 43; a cover 40 having a rim 40d which lies against the integrated circuit package 43, the cover 40 being shaped to form a passage for the liquid between the integrated circuit package 43 and the cover 40; a retaining mechanism 42, which is fastened directly to the integrated circuit package 43, and which includes a member 42a that extends above the cover 40; and a spring 41, which is held in compression between the cover 40 and the retaining mechanism member 42; the spring 41 being adapted to press the rim 40d against the integrated circuit package 43 with at least a predetermined minimal force which prevents leaks and at the same time not exceed a stress limit in the spring. In a second embodiment, a leak tolerant cooling system for cooling electrocial components with a liquid comprises: a frame 10 holding a plurality of printed circuit boards 11, each of which have electrical components attached thereto; a top reservoir 14, mounted on the frame 10 above the boards, for holding the liquid at atmospheric pressure; a conduit (17a-17g) coupled to the top reservoir and the boards, for conveying the liquid in a downward direction from the top reservoir over the components, the conduit being airtight in the absence of a leak therein; a bottom reservoir 15, coupled to the conduit below the boards, for receiving the liquid plus any air due to leaks from the conduit, the bottom reservoir being airtight except for a valve 16 which opens in response to a valve control signal S2; a pump 19, coupled to the bottom reservoir, for sucking the liquid and air through the conduit at sub- atmospheric pressures in response to a pump control signal S1, and for simultaneously returning the liquid to the top reservoir; and a control circuit 25 for generating the pump control signal starting when the liquid in the bottom reservoir is at a predetermined high level and continuing until the liquid in the bottom reservoir drops to a predetermined low level due to air leaking into the conduit, and for generating the valve control signal as the complement of the pump control signal.
549537
Halkola Kyle George
Tustaniwskj Jerry Ihor
R. William Wray & Associates
Unisys Corporation
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