Patent ID: 7866373
Filing Date: 2011-01-11
Classification: F28D

Abstract:
1. A heat pipe comprising: a metal casing having an inner wall therein and defining an evaporating section for receiving heat and a condensing section for releasing heat; a working fluid received in the metal casing and evaporated into vapor in the evaporating section and condensed into liquid in the condensing section; a capillary wick provided inside the metal casing, the capillary wick comprising first capillary wicks arranged in the evaporating and condensing sections, respectively, a second capillary wick extending in an axial direction of the casing and interconnecting the two first capillary wicks, and a third capillary wick disposed on a portion of the inner wall of the casing and interconnecting the first capillary wicks, the second capillary wick being separated from the inner wall of the casing; a tube surrounding the second capillary wick; and a vapor passage formed between the tube and an inner surface of the third capillary wick, and a liquid channel defined in the capillary wick; wherein the vapor in the evaporating section flows towards the condensing section of the casing along the vapor passage and the liquid in the condensing section of the casing returns to the evaporating section along the liquid channel, the tube separating the vapor passage and the liquid at a place where the tube is located.