Capillary-assisted compact thermosiphon

A thermosiphon cooling assembly for cooling an electronic device comprising;

• an evaporating unit having a top,
• a refrigerant disposed in said evaporating unit for liquid-to-vapor transformation,
• a condensing tube disposed about a central axis extending upwardly from said top of said evaporating unit and having an interior surface connected to and in fluid communication with said evaporating unit,
• a plurality of condensing fins spaced about said interior surface of said condensing tube and extending axially along said central axis, and
• a wick material disposed in said evaporating unit and extending into said condensing tube along said condensing fins for conveying liquid from said condensing tube to said evaporating unit;
• wherein said interior surface of said condensing tube and each condensing fin forms a pair of corners and said wick material is disposed in each of said corners to extend along said corners whereby liquid is conveyed to said corners by surface tension and to said evaporating unit by said wick material.

A thermosiphon cooling assembly for cooling an electronic device comprising;

• an evaporating unit having a rectangular cross-section and a flat top and a flat bottom spaced vertically from said top for receiving heat from the electronic device,
• a refrigerant disposed in said evaporating unit for liquid-to-vapor transformation,
• a plurality of boiler fins disposed in said evaporating unit for transferring heat from said electronic device to said refrigerant,
• a condensing tube having an exterior surface of a conical shape disposed about and along a central axis extending upwardly from said top of said evaporating unit with the cross-sectional area of said condensing tube decreasing along said central axis from said top to an upper distal end and having an interior surface connected to and in fluid communication with said evaporating unit,
• said evaporating unit being hermetically sealed to said condensing tube about said central axis,
• said central axis extending at an acute angle to said top and being curved from said top of said evaporating unit to said upper distal end and extending at said upper distal end at an acute angle in relation to said top,
• a plurality of cooling fins disposed about said exterior surface of said condensing tube and spiraling counter-clockwise about said central axis from said exterior surface of said condensing tube to a fin tube and extending axially along said central axis and being parallel to each other and having a constant space between adjacent cooling fins,
• said fin tube having a circular cross-section of constant diameter and curving along said central axis from said upper distal end to said top,
• an air moving device having a hub and a plurality of vanes for propelling air along said exterior surface and parallel to said central axis at said upper distal end and over said cooling fins,
• said hub of said air moving device supported on said central axis on said upper distal end of said condensing tube and extending radially perpendicularly to said central axis and outwardly at least radially to said exterior surface of said condensing tube at said upper distal end,
• said vanes extending perpendicular to said central axis and radially outward of said exterior surface at said upper distal end for propelling air along said exterior surface and parallel to said central axis at said upper distal end and over said cooling fins,
• said air moving device including a shroud disposed outward of said vanes at said upper distal end and extending axially along said central axis from said upper distal end to a lower edge spaced from said top for defining an air opening whereby air is propelled by said air moving device along said exterior surface of said condensing tube and over said cooling fins and out of said air opening,
• said shroud having a circular cross-section of constant diameter and curving along said central axis to said air opening and said edge defining said air opening being parallel to said top whereby said air opening is elliptical,
• a plurality of condensing fins spaced circumferentially about and axially along said central axis and extending radially inwardly and perpendicularly from said interior surface of said condensing tube for cooling vapor in said condensing tube,
• a wick material disposed in said evaporating unit and extending into said condensing tube and along said condensing fins for conveying liquid from said condensing tube to said evaporating unit, and
• each condensing fin forming a pair of corners with said interior surface and said wick material being disposed in each of said corners to extend along each of said corners whereby liquid is conveyed to said corners by surface tension and to said evaporating unit by said wicking material.