Radiator and cooling system

A cooling system comprising:

• a radiator comprising:
• an inlet line and an outlet line for a coolant to be cooled;
• and
• a plurality of flow passage units each having a fluid flow passage for the coolant flowing in from the inlet line and returning to the outlet line, the fluid flow passage being connected between the inlet line and the outlet line in parallel with adjacent fluid flow passages with a space therebetween;
• a fan that blows air toward flow passage units of the radiator;
• a coolant jacket that absorbs heat from a heat source in contact therewith;
• and
• a fluid pump that circulates a coolant between the coolant jacket and the radiator,
• wherein the radiator is disposed so that its inlet line is further away from the fan than its outlet line.

A cooling system comprising:

• a radiator comprising:
• an inlet line and an outlet line for a coolant to be cooled;
• and
• a plurality of flow passage units each having a fluid flow passage for the coolant flowing in from the inlet line and returning to the outlet line, the fluid flow passage being connected between the inlet line and the outlet line in parallel with adjacent fluid flow passages with a space therebetween;
• a fan that that blows air toward flow passage units of the radiator;
• a coolant jacket that absorbs heat from a heat source in contact therewith;
• and
• a fluid pump that circulates a coolant between the coolant jacket and the radiator,
• wherein the fan is a centrifugal fan blowing air in a centrifugal direction, and is disposed so that, when the fan blows air toward the flow passage units, the volume of air delivered by the fan toward a second end side of the flow passage units, where coolant flow passages turn from the inlet line to the outlet line of the flow passage units, is larger than that delivered toward a first end side of the flow passage units, where the inlet and outlet lines are located.