Vapor chamber with unequal cross-sectional widths

Abstract

A vapor chamber includes a case, an evaporation portion, a condensation portion, a transmission portion, and a working fluid. The case has a chamber. The evaporation portion, the condensation portion and the transmission portion are formed in different areas of the case. The evaporation portion has a first chamber room. The condensation portion has a second chamber room. A cross-sectional width of the second chamber room is less than a cross-sectional width of the first chamber room. The transmission portion is formed between the evaporation portion and the condensation portion. The transmission portion has a passage communicating with the first and the second chamber room. The passage has a first end adjacent to the evaporation portion and a second end adjacent to the condensation portion. A width of the first end is greater than a width of the second end. The working fluid is disposed in the chamber.

What is claimed is: 
     
         1 . A vapor chamber comprising:
 a case, comprising a chamber;   an evaporation portion, disposed in one part of the case, and comprising a first chamber room in the chamber;   a condensation portion, disposed in another part of the case and located on one side the evaporation portion, comprising a second chamber room in the chamber, and a cross-sectional width of the second chamber room being less than a cross-sectional width of the first chamber room;   a transmission portion, disposed in the case and between the evaporation portion and the condensation portion, comprising a passage communicating with the first chamber room and the second chamber room in the chamber, the passage comprising a first end adjacent to the evaporation portion and a second end adjacent to the condensation portion, and a width of the first end being greater than a width of the second end; and   a working fluid, disposed in the chamber.   
     
     
         2 . The vapor chamber of  claim 1 , further comprising a wick structure, wherein the case comprises a lower shell, the lower shell comprises a bottom plate, and the wick structure is laid on the bottom plate. 
     
     
         3 . The vapor chamber of  claim 2 , further comprising multiple partitions, wherein each partition is arranged in the passage and located over the wick structure. 
     
     
         4 . The vapor chamber of  claim 3 , wherein each partition is radially arranged or equidistantly arranged. 
     
     
         5 . The vapor chamber of  claim 1 , further comprising multiple partitions, wherein each partition is arranged in the passage. 
     
     
         6 . The vapor chamber of  claim 1 , wherein a baseline is defined through the evaporation portion and the condensation portion, the baseline is a connecting line of centers of the first chamber room and the second chamber room and passes center of the passage, and the cross-sectional width of the first chamber room and the cross-sectional width of the second chamber room are separately perpendicular to the baseline. 
     
     
         7 . The vapor chamber of  claim 1 , wherein the transmission portion is of a trapezoidal shape. 
     
     
         8 . The vapor chamber of  claim 1 , further comprising an another condensation portion and an another transmission portion, wherein the another condensation portion is disposed on another side of the evaporation portion, and the another transmission portion is disposed between the evaporation portion and the another condensation portion. 
     
     
         9 . The vapor chamber of  claim 8 , wherein the another condensation portion comprises an another second chamber room in the chamber, and a cross-sectional width of the another second chamber room is less than the cross-sectional width of the first chamber room. 
     
     
         10 . The vapor chamber of  claim 9 , wherein the another transmission portion comprises an another passage communicating with the first chamber room and the another second chamber room, the another passage comprises an another first end adjacent to the evaporation portion and an another second end adjacent to the another condensation portion, and a width of the another first end is greater than a width of the another second end.