Patent ID: 9746249
Date: 2017-08-29
CPC Classifications: F28D

Claim:
1. A heat pipe structure comprising: a first closed tubular body having an internal first receiving space, a first working fluid being contained in the first receiving space, two ends of the first receiving space being respectively two first closed ends; a second closed tubular body completely contained in the first receiving space in contact with and surrounded by said first working fluid, the second tubular body having an internal second receiving space, a second working fluid being contained in the second receiving space, two ends of the second receiving space being respectively two second closed ends; a third tubular body disposed in the first receiving space, the third tubular body having a third receiving space, a third working fluid being contained in the third receiving space, two ends of the third receiving space being respectively two third closed ends; wherein the third closed ends are formed in the first receiving space and connected with the first closed ends; wherein the second and third tubular body's exterior surfaces are abutting each other; and wherein the solidification temperature of the first working fluid is lower than the solidification temperature of the second working fluid, so that the heat pipe structure can be activated at low temperature to keep operating at normal temperature.