| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling device with a simple structure, which can be miniaturized and thinned while improving the cooling efficiency. SOLUTION: This cooling device is provided in a closed circulating passage for circulating a refrigerant, and adapted so that a centrifugal pump 1 makes contact with a heating electronic part 2 to take heat from the electronic part 2 by the heat exchange effect of the refrigerant therein by the contact, and the heat is released from a radiator. The centrifugal pump 1 comprises a pump casing 15 and an open type impeller 11. The pump casing 15 has a pump chamber recessed part, a number of projections 24 protruded from the bottom thereof, a heat receiving surface 15b formed on a side surface laid along an internal pump chamber 15a. The heat receiving surface 15b is formed in a complementary shape with the three-dimensional shape of the upper surface of the heating electronic part 1 in the contact position therewith, and a suction passage 19 is provided between the heat receiving surface 15b and the inner wall surface of the pump chamber 15a. COPYRIGHT: (C)2005,JPO&NCIPI |
