Patent ID: 7093647

Claim:
An ebullition cooling device for a heat generating component, comprising: a boiling unit configured to boil a refrigerant contained therein with a heat generated by the heat generating component attached to an outer surface of the boiling unit; a condensing unit disposed above the boiling unit and configured to condense a refrigerant vapor flowing thereinto from the boiling unit by heat exchange with an external fluid; and a communication pipe interconnecting the boiling unit and the condensing unit and having a refrigerant vapor channel and a refrigerant condensate channel therein, the communication pipe having an upper end portion projecting into a bottom portion of the condensing unit, the upper end portion having a partially cutout portion so that an upper-end outlet of the refrigerant vapor channel is positioned above an upper-end inlet of the refrigerant condensate channel so as to avoid interference between a refrigerant vapor flowing out of the upper-end outlet of the refrigerant vapor channel into the bottom portion of the condensing unit and a refrigerant condensate flowing out of the bottom portion of the condensing unit into the upper-end inlet of the refrigerant condensate channel.