Heat sink
The present disclosure is to provide a heat sink capable of improving cooling efficiency of a heat radiation fin and exhibiting excellent cooling performance with respect to a cooling target regardless of an installation posture of the heat sink, and capable of being installed even in a narrow space. The heat sink includes: a heat transport member having a heat receiving portion thermally connected to a heat-generating element and including a first wick structure; a tube body connected to a heat insulating portion or a heat radiating portion of the heat transport member and including a second wick structure; and a heat radiation fin group which is thermally connected to the tube body and in which a plurality of heat radiation fins are arranged, in which, the heat transport member has an integral internal space that communicates from the heat receiving portion to a connection portion with the tube body and is sealed with a working fluid, the internal space of the heat transport member communicating with an internal space of the tube body, and the first wick structure includes a branch portion branched in a thickness direction of the heat transport member and multi-stage stem parts extending from the branch portion in a predetermined direction.
1. A heat sink comprising:
a heat transport member having a heat receiving portion thermally connected to a heat-generating element and including a first wick structure;
a tube body connected to a heat insulating portion or a heat radiating portion of the heat transport member and including a second wick structure; and
a heat radiation fin group which is thermally connected to the tube body and in which a plurality of heat radiation fins are arranged, wherein
the heat transport member has an integral internal space that communicates from the heat receiving portion to a connection portion with the tube body and is sealed with a working fluid, the internal space of the heat transport member communicating with an internal space of the tube body, and
the first wick structure includes a branch portion branched in a direction orthogonal to a heat transport direction of the heat transport member and multi-stage stem parts extending from the branch portion in a predetermined direction.
2. The heat sink according to claim 1 , wherein a plurality of tube bodies are arranged in the direction orthogonal to the heat transport direction of the heat transport member.
3. The heat sink according to claim 1 , wherein the stem part has a part extending in a heat transport direction of the heat transport member.
4. The heat sink according to claim 1 , wherein the stem part is connected to the second wick structure via a connection member.
5. The heat sink according to claim 4 , wherein the connection member is a wick member having a capillary force.
6. The heat sink according to claim 4 , wherein the connection member is supported by a support member.
7. The heat sink according to claim 1 , wherein a heat-receiving-portion surface area increasing portion is provided on an inner surface of the heat receiving portion.
8. The heat sink according to claim 1 , wherein the tube body extends along an arrangement direction of the heat radiation fins.
9. The heat sink according to claim 1 , wherein an extending direction of the tube body is not parallel to a heat transport direction of the heat transport member.
10. The heat sink according to claim 1 , wherein the tube body extends in a plurality of direction from the heat transport member.
11. The heat sink according to claim 1 , wherein at least one surface of the heat transport member has a planar shape.