US 12,253,314 B2
Heat pipe
Shih-Lin Huang, Taoyuan (TW); Chiu-Kung Chen, Taoyuan (TW); Sheng-Hua Luo, Taoyuan (TW); and Ti-Jun Wang, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Sep. 20, 2023, as Appl. No. 18/471,079.
Application 18/471,079 is a continuation of application No. 18/153,760, filed on Jan. 12, 2023, granted, now 11,796,259.
Application 18/153,760 is a continuation of application No. 17/223,696, filed on Apr. 6, 2021, granted, now 11,598,585, issued on Mar. 7, 2023.
Application 17/223,696 is a continuation of application No. 16/549,895, filed on Aug. 23, 2019, abandoned.
Application 16/549,895 is a continuation of application No. 14/818,716, filed on Aug. 5, 2015, abandoned.
Claims priority of application No. 201410709251.7 (CN), filed on Nov. 28, 2014.
Prior Publication US 2024/0011719 A1, Jan. 11, 2024
Int. Cl. F28D 15/02 (2006.01); F28D 15/04 (2006.01)
CPC F28D 15/046 (2013.01) [F28D 15/0233 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A heat pipe, comprising:
a flat tube having an axial direction, a width direction and a height direction perpendicular to each other, the length in the width direction is greater than that in the height direction, wherein the flat tube includes a hollow chamber and has a front sealed end and a rear sealed end along the axial direction; and
a wick structure disposed in the hollow chamber and extended along the axial direction of the flat tube,
wherein the wick structure is divided into a front section, a middle section and a rear section sequentially along the axial direction, the front section is near the front sealed end, the rear section is near the rear sealed end,
wherein the front, middle and rear sections have a maximum length parallel to the width direction, respectively; and the maximum length of the front section is greater than that of the middle section, and the maximum length of the middle section is greater than that of the rear section,
wherein the wick structure is completely disconnected from two opposite sidewalls of the flat tube,
wherein a cross-sectional area of the front section measured along the axial direction and the width direction is larger than that of the middle section measured along the axial direction and the width direction, a cross-sectional area of the middle section measured along the axial direction and the width direction is larger than that of the rear section measured along the axial direction and the width direction, and
wherein the connection between the front section and the middle section exhibits a sectional difference, the connection between the middle section and the rear section exhibits a sectional difference.