Abstract: A heat sink includes a pillar member, to which a device that generates heat is to be mounted, and a plurality of heat-dissipating fins arranged on a side surface of the pillar member to dissipate the heat generated by the device. The heat sink further includes a ring-shaped holding member that has a plurality of grooves formed therein. The holding member is mounted to a longitudinal end of the pillar member and has each of the heat-dissipating fins inserted in a corresponding one of the grooves of the holding member, thereby holding the heat-dissipating fins to the pillar member. Each of the heat-dissipating fins has a detachment prevention portion that prevents the heat-dissipating fin from being detached from the pillar member in a direction perpendicular to the longitudinal direction of the pillar member.

Abstract: A thermoelectric generator comprising: at least a high-temperature heat source using a high-temperature fluid; at least a low-temperature heat source using a low-temperature fluid lower in temperature than the high-temperature fluid; and a plurality of thermoelectric elements arranged in parallel between the high-temperature heat source and the low-temperature heat source; wherein at least selected one of the high-temperature heat source and the low-temperature heat source is connected with a frame surrounding the plurality of thermoelectric elements.