Cooling device of thin plate type for preventing dry-out

Abstract

The present invention provides a thin plate type cooling device including at least one cavity formed on an inside wall of coolant circulation loop in order to prevent dry-out of the coolant.

1 . A thin plate-type cooling device comprising: 
 a thin plate-shaped housing in which a circulation loop of a fluid is formed; and    a coolant capable of changing from one state to another, circulating along said circulation loop inside said housing,    wherein said circulation loop inside said housing comprises:    an evaporation section formed on one end of said circulation loop, wherein said liquefied coolant is at least partly filled by a capillary action and said coolant filled in a liquid state is gasified by heat transferred from an external heat source;    a gaseous coolant transfer section formed adjacent to said evaporation section, wherein said gasified coolant is transferred through said gaseous coolant transfer section and said gaseous coolant transfer section has at least one first cavity for containing said gaseous coolant which has not been condensed;    a liquefied coolant transfer section formed adjacent to said condensation section and thermally insulated from said evaporation section, wherein said liquefied coolant is transferred towards said evaporation section; and    a thermal insulation section for thermally insulating said evaporation section from at least a part of said liquefied coolant transfer section.    
     
     
         2 . A thin plate-type cooling device as claimed in  claim 1 , wherein at least a part of said liquefied coolant transfer section comprises a liquefied coolant storage section for storing said coolant in the liquid state.  
     
     
         3 . A thin plate-type cooling device as claimed in  claim 2 , wherein at least a part of said liquefied coolant transfer section comprises a plurality of liquefied coolant storage sections.  
     
     
         4 . A thin plate-type cooling device as claimed in  claim 2 , wherein said liquefied coolant storage section comprises a tiny channel of which surface tension is set to be more than gravity.  
     
     
         5 . A thin plate-type cooling device as claimed in  claim 1 , wherein a cross-section of a tiny channel of said evaporation section and/or said liquefied coolant transfer section becomes small from said liquefied coolant transfer section contacting said condensation section to said evaporation section contacting said gaseous coolant transfer section.  
     
     
         6 . A thin plate-type cooling device as claimed in  claim 1 , wherein said condensation section has at least one second cavity.  
     
     
         7 . A thin plate-type cooling device as claimed in  claim 1 , wherein said liquefied coolant transfer section has at least one third cavity.  
     
     
         8 . A thin plate-type cooling device as claimed in  claim 1 , wherein hydrophilic treatment is performed on surfaces of said liquefied coolant transfer section and said evaporation section, and hydrophobic treatment is performed on surfaces of said gaseous coolant transfer section and said condensation section.