Coolant circulating apparatus, and cooling apparatus including the same coolant circulating apparatus for electric and/or electronic device which generates heat

A cooling apparatus for an electric and/or electronic device having a heat generating element, comprising:

• a cooler which is disposed adjacent to the heat generating element and in which a coolant circulating passage having an inlet and an outlet is provided;
• a radiator which is disposed apart from the heat generating element and in which a coolant circulating passage having an inlet and an outlet is provided, the inlet being connected to the outlet of the coolant circulating passage of the cooler;
• and
• a coolant circulating apparatus which is interposed between the cooler and the radiator and which supplies a heat-radiated coolant from the outlet of the coolant circulating passage of the radiator to the inlet of the coolant circulating passage of the cooler and moves the coolant passed through the coolant circulating passage of the cooler toward the inlet of the coolant circulating passage of the radiator,
• wherein the coolant circulating apparatus comprises:
• circulating pumps which are disposed in parallel to each other, and each of which has an inlet port and a discharge port and discharges coolant flowing into the inlet port from the discharge port;
• a coolant selectively introducing unit which is connected to the inlet ports of the circulating pumps and which selectively introduces the coolant into the inlet ports of the circulating pumps;
• check valves which are connected to the discharge ports of the circulating pumps;
• branched coolant supply pipes which extend horizontally or downwardly from the check valves and which have extending ends at which the branched coolant supply pipes are integrated with each other;
• an integrated coolant supply pipe which extends upward from the integrated extending ends of the branched coolant supply pipes;
• and
• a coolant discharge pipe with an on-off valve, which extends horizontally or downwardly from the integrated extending ends of the branched coolant supply pipes.