Abstract: A heat dissipation device includes a first heat dissipator, a second heat dissipator, a first tank connected to one side of each of the first heat dissipator and the second heat dissipator in a first direction, and a second tank connected to another side in the first direction. A coolant flows through an inside of the first heat dissipator, the second heat dissipator, the first tank, and the second tank. The first tank includes a tank-side first outflow port through which the coolant flows out to a first cooling device, and a tank-side first inflow port through which the coolant from the first cooling device flows in. The second tank includes a tank-side second outflow port through which the coolant flows out to a second cooling device, and a tank-side second inflow port through which the coolant from the second cooling device flows in.

Abstract: A cooling device includes a first cooling section, a second cooling section, a first pump section, a second pump section, a branch section, a first flow path section, a second flow path section, a merging section, and a connection section. The branch section branches a refrigerant into two. The first flow path section connects the first cooling section and the first pump section, and one portion of the refrigerant passes through the first flow path section. The second flow path section connects the second cooling section and the second pump section, and another portion of the refrigerant passes through the second flow path section. The merging section merges the refrigerant having passed through each of the first flow path section and the second flow path section. The connection section connects the first and second flow path sections between the branch section and the merging section.

Abstract: A heat dissipation device includes a first heat dissipator, a second heat dissipator, a first tank connected to one side of each of the first heat dissipator and the second heat dissipator in a first direction, and a second tank connected to another side in the first direction. A coolant flows through an inside of the first heat dissipator, the second heat dissipator, the first tank, and the second tank. The first tank includes a tank-side first outflow port through which the coolant flows out to a first cooling device, and a tank-side first inflow port through which the coolant from the first cooling device flows in. The second tank includes a tank-side second outflow port through which the coolant flows out to a second cooling device, and a tank-side second inflow port through which the coolant from the second cooling device flows in.

Abstract: A tank includes a housing, a tank chamber inflow hole, a tank chamber outflow hole, and a protruding flow path. The housing includes a tank chamber. Liquid flows into the tank chamber from the tank chamber inflow hole. Liquid in the tank chamber flows out from the tank chamber outflow hole. The protruding flow path is connected to the tank chamber outflow hole, and protrudes into the tank chamber from the tank chamber outflow hole. With this arrangement, outflow of gas from the tank chamber through which liquid flows is suppressed.

Abstract: A liquid feeder includes a first casing with a flow path, and a pump. An upstream flow path located upstream of the pump and communicating with a pump inlet includes a first flow path, a second flow path, a third flow path, a fourth flow path, a fifth flow path, and a sixth flow path that are located on one side in a first direction, another side in the first direction, one side in a second direction, another side in the third direction, one side in the third direction, and another side in the third direction with respect to the pump inlet, respectively.