Patent ID: 8016024

Claim:
A loop heat pipe with a flat evaporator for a heat source, comprising: an evaporation section, a condensation section, and a transportation section connected between the evaporation section and the condensation section; wherein the evaporation section comprises: an enclosed containment structure positionable on the heat source and comprising a lid and a container defining there between an enclosed containment space which receives a working fluid; a channel structure enabling uni-directional liquid and gas flow, comprising a plurality of longitudinally extended channels formed in a bottom of the enclosed containment space and arranged in a substantially parallel and equally spaced manner; wherein flow of liquid and gas is in the same direction; a liquid inlet formed in a circumferential wall of the container and arranged perpendicular to the channel structure; a gas outlet formed in the circumferential wall of the container and in communication with the channels of the channel structure, the gas outlet being opposite to the liquid inlet; and a single-phase capillary structure, arranged in the enclosed containment space and positioned in horizontally offset manner on the channel structure to be displaced from the heat source thereby, at least a portion of the channels remaining horizontally offset from the capillary structure to be in open communication with the gas outlet, the capillary structure having an internal chamber open on one end thereof to be in open communication with the liquid inlet and closed on an opposing end of the capillary structure for replenishment of the working fluid, a portion of the internal chamber between the inlet and the channel structure forming a replenishment channel; wherein the transportation section comprises: a gas passage connected to the gas outlet of the enclosed containment structure; and a liquid passage connected to the liquid inlet of the enclosed containment structure; and wherein the condensation section comprises: a condensing device connected to the gas passage for receiving and cooling vapor formed in the evaporation section by evaporation of the working fluid and converting the vapor into a liquid form of the working fluid, the condensing device being further connected to the liquid passage to allow the condensed liquid to flow away; wherein the working fluid received in the enclosed containment space is subject to heating by the heat source and evaporates into vapor, the vapor moving through the gas passage connected to the gas outlet to the condensing device of the condensation section where the vapor is cooled and converted back to the liquid form of the working fluid that is then guided through the liquid passage back to the enclosed containment space for next cycle; a barrier disposed between the capillary structure and the lid, the barrier extending in a direction transverse to the longitudinal direction of the plurality of channels.