Abstract: Provided is a heat pipe which is installed in a cold region in a bottom heat posture in which a longitudinal direction of a container is substantially in parallel with a gravitational direction, is capable of preventing the container from deforming even when a working fluid has become frozen, and has excellent heat transport properties.

Abstract: Provided is a heat pipe which is installed in a cold region in a bottom heat posture in which a longitudinal direction of a container is substantially in parallel with a gravitational direction, is capable of preventing the container from deforming even when a working fluid has become frozen, and has excellent heat transport properties.

Abstract: Provided is a heat pipe which is installed in a cold region in a bottom heat posture in which a longitudinal direction of a container is substantially in parallel with a gravitational direction, is capable of preventing the container from deforming even when a working fluid has become frozen, and has excellent heat transport properties.

Abstract: The present disclosure provides a heat pipe capable of preventing deformation of even a thin container and having excellent heat transfer characteristics by preventing freezing of a working fluid even if the longitudinal direction of the container is set substantially parallel to the direction of gravity in cold regions. A heat pipe includes a container having a tubular shape with both ends sealed, a wick structure stored in the container, and a working fluid sealed in the container, wherein, in at least one of cross sections perpendicular to the longitudinal direction of the container, the wick structure is in contact with the inner surface of the container at two points but both side surfaces of the wick structure are not in contact with any inner surface of the container, and a sintered metal layer is formed on the container inner surface being not in contact with the wick structure.

Abstract: The present disclosure is related to providing a heat sink that can exhibit an excellent cooling property for even a heating element generating a high amount of heat and being mounted to a narrowed space. The heat sink includes a plurality of heat pipes to be thermally connected to a heating element, and a heat dissipation section thermally connected to the plurality of heat pipes, in which in the plurality of heat pipes, at least evaporation sections to be thermally connected to the heating element have flattened portions whose cross sectional shape in a direction orthogonal to a heat transfer direction of the plurality of heat pipes is flattened, and surfaces in the flattened portions in a thickness direction are arranged facing the heating element.

Abstract: The heat sink includes a radiation fin extending in a vertical direction from a heat-receiving unit, in which the radiation fin includes a notched portion in which a tip end side corner of the radiation fin is retracted inward in a main surface direction of the radiation fin with respect to a virtual rectangle or a virtual square formed of a side of the radiation fin on the heat-receiving unit side viewed from the main surface side, a first side extending from both ends of the side on the heat-receiving unit side in a direction orthogonal to the side on the heat-receiving unit side and a second side formed by extending a linear portion on the side of the radiation fin on a tip end side facing the side on the heat-receiving unit side to the first side.

Abstract: Example embodiments may provide a heat sink capable of cooling even when hot spots generate a large amount of heat that is unevenly distributed in some regions of a heating element package. The heat sink may include a plurality of heat pipes including one end portions thermally connected to a heating element package provided with a heating element in a package and other end portions thermally connected to a heat dissipation unit, in which the plurality of heat pipes includes at least a first heat pipe and a second heat pipe having greater heat transport capacity than heat transport capacity of the first heat pipe.

Abstract: The present disclosure provides a heat pipe capable of preventing deformation of even a thin container and having excellent heat transfer characteristics by preventing freezing of a working fluid even if the longitudinal direction of the container is set substantially parallel to the direction of gravity in cold regions. A heat pipe includes a container having a tubular shape with both ends sealed, a wick structure stored in the container, and a working fluid sealed in the container, wherein, in at least one of cross sections perpendicular to the longitudinal direction of the container, the wick structure is in contact with the inner surface of the container at two points but both side surfaces of the wick structure are not in contact with any inner surface of the container, and a sintered metal layer is formed on the container inner surface being not in contact with the wick structure.

Abstract: Provided is a heat pipe which is installed in a cold region in a bottom heat posture in which a longitudinal direction of a container is substantially in parallel with a gravitational direction, is capable of preventing the container from deforming even when a working fluid has become frozen, and has excellent heat transport properties.