Loop-type heat pipe including an evaporator, first and second condensers, a liquid pipe connecting the evaporator to the first and second condensers, and first and second vapor pipes connecting the evaporator to the first and second condensers

A loop-type heat pipe comprising:

• an evaporator configured to vaporize an operating fluid;
• a first condenser and a second condenser configured to condense the operating fluid;
• a liquid pipe configured to connect the evaporator and the first condenser and second condenser;
• a first vapor pipe configured to connect the evaporator and the first condenser;
• and
• a second vapor pipe configured to connect the evaporator and the second condenser,
• wherein
• the liquid pipe comprises:
• a first liquid pipe having a first flow path and connected to the first condenser, the first liquid pipe including a first porous body defining a first space within the first liquid pipe at which the first porous body is not provided,
• a second liquid pipe having a second flow path and connected to the second condenser, the second liquid pipe including a second porous body defining a second space within the second liquid pipe at which the second porous body is not provided, and
• a third liquid pipe having a third flow path connecting to the first flow path and the second flow path and connected to the evaporator, the third liquid pipe including a pair of third porous bodies defining a third space within the third liquid pipe at which the pair of third porous bodies is not provided, the third space configured to communicate with the first space and the second space,
• the evaporator, the first vapor pipe, the first condenser, the first liquid pipe, and the third liquid pipe form a first loop-shaped flow path,
• the evaporator, the second vapor pipe, the second condenser, the second liquid pipe, and the third liquid pipe form a second loop-shaped flow path,
• the first vapor pipe, the first condenser, and the first liquid pipe of the first loop-shaped flow path are formed independently from the second vapor pipe, the second condenser, and the second liquid pipe of the second loop-shaped flow path, so that the first loop-shaped flow path and the second loop-shaped flow path are formed independently from each other except at the third liquid pipe and the evaporator, and the first loop-shaped flow path and the second loop-shaped flow path share only the third liquid pipe and the evaporator,
• the third space is defined between a first of the pair of third porous bodies and a second of the pair of third porous bodies, the second of the pair of third porous bodies extends between and contacts each of a pair of opposed walls of the third liquid pipe so as to fill an inside of the third liquid pipe at the pair of opposed walls of the third liquid pipe, the pair of opposed walls projecting away from a wall of the third liquid pipe on which the first of the pair of third porous bodies is provided, and
• as seen from above, the second of the pair of third porous bodies includes a concave portion that is concave toward the evaporator and away from the first of the pair of third porous bodies and the wall of the third liquid pipe on which the first of the pair of third porous bodies is provided, the concave portion being provided between a boundary of the third space with the first space and a boundary of the third space with the second space, so that the third space has a first width at the boundary with the first space, a second width at the boundary with the second space, and a third width greater than the first width and the second width at the concave portion between the boundary with the first space and the boundary with the second space.