Heat transporting unit and electronic device

Abstract

A heat transporting unit comprises an upper plate, a lower plate opposing the upper plate, an internal space formed by the upper plate and the lower plate and operable to enter a refrigerant, a plurality of paths dividing the internal space in a first direction, and a plurality of grooves being provided at a bottom surface of the internal space. The plurality of the paths and the plurality of the grooves are connected by capillary channels in a region, and are divided by sidewalls in another region.

1 . A heat transporting unit ( 1 ) comprising:
 an upper plate ( 2 );   a lower plate ( 3 ) opposing to said upper plate ( 2 );   an internal space ( 4 ) formed by said upper plate ( 2 ) and said lower plate ( 3 ), said internal space being operable to seal a refrigerant therein;   a plurality of paths ( 5 ) dividing said internal space in a first direction; and   a plurality of grooves ( 10 ) provided on a bottom surface of said internal space ( 41 );   wherein:
 said plurality of paths ( 5 ) and said plurality of grooves ( 10 ) are connected to each other at a partial region by capillary channels ( 12 ) and ( 13 ); and 
 said plurality of paths ( 5 ) and said plurality of grooves ( 10 ) are separated from each other at another partial region by dividing walls ( 11 ). 
   
     
     
         2 . The heat transporting unit ( 1 ) of  claim 1 , wherein:
 said upper plate ( 2 ) is of a plate-like shape and includes a first space, which is of a plate-like shape, of an upper plate ( 2 ) side;   said lower plate ( 3 ) is of a plate-like shape and includes a second space, which s of a plate-like shape, of a lower plate side;   said plurality of paths ( 5 ) are formed in the first space of the upper plate side; and   said plurality of grooves ( 10 ) oppose to said plurality of paths ( 5 ) via the dividing walls ( 1  I), and are formed in the second space of the lower plate ( 3 ) side.   
     
     
         3 . The heat transporting unit ( 1 ) of  claim 2 , wherein each of said plurality of paths ( 5 ) opposes to one or more grooves among said plurality of grooves ( 10 ). 
     
     
         4 . The heat transporting unit ( 1 ) of  claim 3 , wherein said plurality of grooves ( 10 ) are formed in the first direction. 
     
     
         5 . The heat transporting unit ( 1 ) of  claim 4 , wherein said plurality of paths ( 5 ) and said plurality of grooves ( 10 ) include first end parts ( 21 ) of an end in the first direction, and second end parts ( 22 ) of another end in the first direction. 
     
     
         6 . The heat transporting unit ( 1 ) of  claim 5 , wherein the capillary channels ( 12 ) and ( 13 ) are provided with the first end parts ( 21 ) and the second end parts ( 22 ), respectively. 
     
     
         7 . The heat transporting unit ( 1 ) of  claim 6 , wherein each of the dividing walls ( 11 ) includes a plurality of internal through holes ( 42 ). 
     
     
         8 . The heat transporting unit ( 1 ) of  claim 7 , wherein the plurality of internal through holes ( 42 ) form the capillary channels ( 12 ) and ( 13 ). 
     
     
         9 . The heat transporting unit ( 1 ) of  claim 8 , wherein corner portions of at least one of said plurality of paths ( 5 ) and said plurality of grooves ( 10 ) are chamfered. 
     
     
         10 . The heat transporting unit ( 1 ) of  claim 9 , wherein metal-plating is performed on surfaces of at least of said plurality of paths ( 5 ) and said plurality of grooves ( 10 ). 
     
     
         11 . The heat transporting unit ( 1 ) of  claim 10 , wherein the metal-plating is performed with metal selected from a group consisting of gold, silver, copper, aluminum, nickel, cobalt, and alloy thereof. 
     
     
         12 . The heat transporting unit ( 1 ) of  claim 11 , further comprising communication paths ( 51 ) where the refrigerant can move from one to another of said plurality of paths ( 5 ). 
     
     
         13 . The heat transporting unit ( 1 ) of  claim 12 , wherein the capillary paths ( 12 ) and ( 13 ) connect said plurality of paths ( 5 ) and said plurality of grooves ( 10 ) at the first end parts ( 21 ) and the second end parts ( 22 ). 
     
     
         14 . The heat transporting unit ( 1 ) of  claim 13 , wherein the refrigerant receives heat from the heating element ( 20 ) at the first end parts ( 21 ) to evaporate. 
     
     
         15 . The heat transporting unit ( 1 ) of  claim 14 , wherein the evaporated refrigerant diffuses in said plurality of paths ( 5 ) from the first end parts ( 21 ) to the second end parts ( 22 ). 
     
     
         16 . The heat transporting unit ( 1 ) of  claim 15 , wherein the evaporated refrigerant is condensed at the second end parts ( 22 ). 
     
     
         17 . The heat transporting unit ( 1 ) of  claim 16 , wherein the condensed refrigerant circulate from said plurality of path ( 5 ) to said plurality of grooves ( 10 ) via the capillary channels ( 13 ). 
     
     
         18 . The heat transporting unit ( 1 ) of  claim 17 , wherein the refrigerant that is circulating on said plurality of grooves ( 10 ) and that is condensed moves on said plurality of grooves ( 10 ) from the second end parts ( 22 ) to the first end parts ( 21 ), and further circulates from said plurality of grooves ( 10 ) to said plurality of paths ( 5 ) at the first end parts ( 21 ). 
     
     
         19 . The heat transporting unit ( 1 ) of  claim 18 , further comprising a heat radiating unit ( 63 ) for refrigerating the refrigerant evaporated at the second end parts ( 22 ). 
     
     
         20 . The heat transporting unit ( 70 ) of  claim 19 , further comprising a contacting part ( 71 ) for thermally contacting with a heat element at the first end parts ( 21 ).