Loop-type heat pipe

A loop-type heat pipe comprising:

• an evaporator configured to vaporize a working fluid;
• a condenser configured to condense the working fluid;
• a liquid pipe configured to connect the evaporator and the condenser to each other;
• a vapor pipe configured to connect the evaporator and the condenser to each other;
• and
• a loop-shaped flow channel provided in each of the evaporator, the condenser, the liquid pipe, and the vapor pipe, and through which the working fluid flows,
• wherein at least one of the evaporator, the condenser, the liquid pipe, and the vapor pipe comprises:
• a first metal layer having a first inner surface and a first outer surface,
• a second metal layer having a second inner surface bonded to the first inner surface and a second outer surface, and
• a porous body provided between the first outer surface and the second outer surface,
• wherein the porous body comprises:
• a first bottomed hole provided in the first inner surface,
• a second bottomed hole provided in the second inner surface,
• a first fine pore, wherein the first bottomed hole and the second bottomed hole partially communicate with each other through the first fine pore,
• a first groove portion provided in the first inner surface and configured to communicate with the first bottomed hole, and
• a second groove portion provided in the second inner surface and configured to communicate with the second bottomed hole,
• wherein the first outer surface and the second outer surface serve as an outer surface of the at least one of the evaporator, the condenser, the liquid pipe, and the vapor pipe.