US 12,238,896 B2
Vapor-air transition detection for two-phase liquid immersion cooling
Eric Clarence Peterson, Woodinville, WA (US); and Christian L. Belady, Mercer Island, WA (US)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jun. 20, 2022, as Appl. No. 17/844,633.
Prior Publication US 2023/0413485 A1, Dec. 21, 2023
Int. Cl. H05K 7/20 (2006.01)
CPC H05K 7/20381 (2013.01) [H05K 7/203 (2013.01); H05K 7/20318 (2013.01); H05K 7/20336 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for two-phase liquid immersion cooling, comprising:
a first enclosure that is configured to contain a dielectric liquid having a boiling point, a vapor layer above the dielectric liquid layer, and an air layer above the vapor layer, such that a vapor-air boundary is disposed between the vapor layer and the air layer;
a condenser that is configured to condense vapor in the vapor layer; and
a first strip within the first enclosure that is disposed above the dielectric liquid, wherein the first strip is composed of a thermo-conductive material, wherein the apparatus is configured to cool a portion of the first strip to a temperature below the boiling point of the dielectric liquid layer, and wherein the apparatus is further configured to determine a location of the vapor-air boundary based on a detected temperature along a length of the first strip.