Evaporator and loop heat pipe

An evaporator incorporated into a transportation machine to change at least a part of a working fluid from a liquid phase into a gas phase by heat absorbed from a heat source, comprising:

• a plurality of heat exchange units that are aligned in a horizontal direction in the transportation machine placed on a horizontal surface and whose positions change together;
• a plurality of distribution conduits connected respectively to the heat exchange units to supply the working fluid in the liquid phase to the heat exchange units;
• and
• a plurality of valves disposed respectively in the distribution conduits to block passage of the working fluid flowing from the heat exchange units toward the distribution conduits at least when a tilt of the heat exchange units is equal to or greater than a predetermined threshold,
• each heat exchange unit including:
• an inlet portion connected to the distribution conduit;
• and
• a heat exchange portion that includes at least one heat exchange path extending straight upward from the inlet portion and that allows the working fluid passing through the heat exchange path to exchange heat with the heat source.