| 摘要 |
PROBLEM TO BE SOLVED: To provide an ebullient cooling device of high performance by improving heat transferring performance of refrigerant flow channels. SOLUTION: In this ebullient cooling device 1 comprising a heat radiating portion composed of first and second refrigerant tanks 4, 5, the plurality of refrigerant flow channels 3, and a heat radiation fin 2, and having a refrigerant sealed therein, the refrigerant flow channels 3 are composed of flat pipes 3 having inner post portions 31 longitudinally partitioning the inside, and provided with heat transfer enhancing portions 32-34 on the inner post portions for enhancing heat transfer of the refrigerant. The heat transfer enhancing portions are composed of a plurality of hole portions 32 and a plurality of cut and raised portions 33, or heat transfer face enlargement portions 34 extending from projecting portions or the inner post portions 31. COPYRIGHT: (C)2006,JPO&NCIPI
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