Patent ID: 7543630
Filing Date: 2009-06-09
Classification: F28D

Abstract:
1. A heat pipe comprising: an outer pipe receiving working fluid; an inner pipe fixedly received in the outer pipe, at least one cutout being defined in each of opposite ends of the inner pipe for allowing the working fluid to pass between the inner pipe and the outer pipe; and a gap defined between the outer pipe and the inner pipe; wherein the gap is very narrow such that an inner wall of the outer pipe and an outer wall of the inner pipe cooperatively form a wicking structure; wherein a plurality of protrusions is arranged on the inner wall of the outer pipe, whereby a plurality of capillary gaps is defined between the outer pipe and the inner pipe; wherein the inner pipe has a height approximately equal to a height of the outer pipe and wherein the working fluid passes between the inner pipe and the outer pipe only through the at least one cut defined in each of opposite ends of the inner pipe; and wherein the outer pipe has an integrally sealed bottom and an open top sealed by a cap.