Heat sink
Provided is a heat sink that can prevent dryout without impairing heat transfer characteristics even when an environmental temperature at the time of use is lower than a melting point of a working fluid. The heat sink includes a heat transport member including a heat receiving part thermally connected to a heat generating body, and a first heat radiating fin group in which a plurality of first heat radiating fins are arranged, the first heat radiating fin group being thermally connected to the heat transport member at a heat radiating part, the heat transport member has an inner space that communicates from the heat receiving part to the heat radiating part and in which a working fluid is sealed, and a heat transfer member is thermally connected to a heat insulating part located between the heat receiving part and the heat radiating part of the heat transport member.
1 . A heat sink comprising:
a heat transport container including a heat receiving part thermally connected to a heat generating body;
a first heat radiating fin group in which a plurality of first heat radiating fins are arranged, the first heat radiating fin group being thermally connected to the heat transport container at a heat radiating part; and
a second heat radiating fin group in which a plurality of second heat radiating fins are arranged, the second heat radiating fin group being thermally connected to the heat transport container at a heat insulating part,
wherein the heat insulating part is located between the heat receiving part and the heat radiating part,
wherein the heat transport container has a first inner space that communicates from the heat receiving part to the heat radiating part via the heat insulating part, and in which a first working fluid is sealed,
wherein the second heat radiating fin group is spaced from the first heat radiating fin group, and
wherein the second fin group has a fin area that is smaller than a fin area of the first heat radiating fin group.
2 . The heat sink according to claim 1 , further comprising a heat pipe located within the heat transfer container, the heat pipe having a second inner space in which a second working fluid is sealed.
3 . The heat sink according to claim 2 , wherein the heat pipe extends from the heat insulating part to the heat receiving part.
4 . The heat sink according to claim 1 , wherein the first inner space of the heat transport container is a single integral space.
5 . The heat sink according to claim 1 , wherein the heat radiating part of the heat transport container has a larger width than the heat receiving part.