Circulation-type liquid cooling apparatus and electronic device containing same

A cooling apparatus comprising:

• a tank for keeping a coolant liquid therein and having an air layer;
• heat receiving means in contact with a heat generating part for receiving heat therefrom;
• radiating means for radiating the heat absorbed by the coolant liquid;
• and
• a circulating mechanism for circulating the coolant liquid from said heat receiving means through said tank and through said radiating means again to said heat receiving means,
• wherein said radiating means includes a thin radiator in which a coolant liquid circulating conduit for radiation is formed;
• said tank is mounted on said radiator;
• said coolant liquid circulating conduit of said radiator is narrowed down in width at the middle position of said tank, and is divided by a narrow gap;
• and
• said radiator includes cavities on both sides of a portion in which the narrow gap in said coolant liquid circulating conduit is formed, each of said cavities having an area covered with said tank mounted on said radiator.