| CPC F28D 15/043 (2013.01) | 16 Claims |
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1. A loop heat pipe comprising:
a pair of outermost metal layers having a pair of outer surfaces on opposite sides thereof, and a pair of inner surfaces opposing each other;
an intermediate metal layer provided between the pair of inner surfaces of the pair of outermost metal layers;
an evaporator configured to vaporize a working fluid to generate vapor;
a condenser configured to liquefy the vapor of the working fluid;
a liquid pipe connecting the evaporator and the condenser; and
a vapor pipe connecting the evaporator and the condenser, and forming a loop shaped passage together with the liquid pipe,
wherein the intermediate metal layer includes
a pair of walls, located at opposite ends of the intermediate metal layer along a direction parallel to the pair of outer surfaces of the pair of outermost metal layers, and forming a part of a pipe wall of the evaporator, the condenser, the liquid pipe, and the vapor pipe,
a porous body provided between the pair of walls,
a plurality of first struts, other than the pipe wall, penetrating the porous body at a plurality of positions in a plan view viewed in a perpendicular direction with respect to one of the pair of outer surfaces of the pair of outermost metal layers, and extending linearly in the perpendicular direction so as to bond the pair of outermost metal layers to each other, wherein the plurality of first struts, in the plan view, have a shape elongated in a primary direction of flow of the working fluid and are disposed intermittently in the primary direction of flow, so that a portion of the porous body is disposed between adjacent first struts that are mutually adjacent along the primary direction of flow, among the plurality of first struts, and
one or a plurality of metal layers,
wherein each of the one or plurality of metal layers of the intermediate metal layer includes
a first part forming at least a part of the pair of walls,
a second part connected to the first part, and forming at least a part of the porous body, and
a third part connected to the second part, and forming at least a part of the plurality of first struts.
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