| CPC H05K 7/20336 (2013.01) [H05K 7/20309 (2013.01); H05K 7/20318 (2013.01)] | 13 Claims |
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5. A cooling system comprising:
a loop heat pipe comprising an evaporator that changes a phase of a working fluid from a liquid phase to a vapor phase; a condenser that changes the phase of the working fluid from the vapor phase to the liquid phase; a vapor line connected between the evaporator and the condenser through which a vapor-phase working fluid flows; a liquid line connected between the condenser and the evaporator through which a liquid-phase working fluid flows; and
a wick including an elastic porous body having an elasticity and provided inside the evaporator in a compressed and deformed state;
a heat receiver configured to receive heat from outside and transfer the heat to the evaporator; and
a heat sink configured to release the heat from the condenser to the outside,
wherein:
the liquid-phase working fluid permeates through the wick and forms a boundary between the liquid phase working fluid and the vapor phase working fluid, and wherein a stress generated in the wick due to compressive deformation is greater than a pressure loss that occurs during circulation of the working fluid from a vapor-phase side of the boundary via the condenser back to a liquid-phase side of the boundary in the wick,
the elastic porous body is under the stress due to the compressive deformation of the wick such that the stress on the elastic porous body is less than a maximum stress omax at which the wick can be elastically deformed,
the wick is compressed in a thickness direction of the heat receiver,
the wick is compressed and stored with a compressive strain ε of up to 20% or less,
the elastic porous body includes a water-foamed silicon rubber, and
a thickness of the wick in an uncompressed state is 2 mm.
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