Patent ID: 9188396
Filing Date: 2015-11-17
Classification: F28D,H01L,Y10T

Abstract:
1. A flattened heat pipe, comprising: a flat and tubular closed container; at least one wick structure; and a working fluid sealed into the container, wherein the wick structure consists of a sintered metal formed of sintered globular or deformed powder, a cross-sectional shape of the wick structure in the container is formed into a semi-elliptical shape having a curved portion and a flat portion, the semi-elliptical shape being one half of an ellipse, the flat portion of the wick structure is in contact with an inner wall of the container, the curved portion of the wick structure is in contact with the inner wall of the container, a capillary force is generated between the curved portion and the inner wall, while a capillary force is also generated in voids formed in the sintered metal, vapor flowing passages are formed at least in curved areas of both sides of the container, the inner wall of the container includes a first flat portion and a second flat portion which face each other, the flat portion of the wick structure is in contact with the first flat portion of the inner wall, the curved portion of the wick structure is in contact with the second flat portion of the inner wall, such that the cross-sectional shape of the wick structure has one point contact with the second flat portion of the inner wall of the container, the one point contact is plastically deformed by the second flat portion of the inner wall, wherein the one point contact is plastically deformed by at most 0.4 mm; the one point contact is an end point of a central axis of the semi-elliptical shape, and a gap between the second flat portion of the inner wall and the curved portion of the wick structure narrows toward the end point.