| 摘要 |
A coolant circulating apparatus includes circulating pumps disposed in parallel to each other and each having inlet and discharge ports and discharging coolant flowing into the inlet port from the discharge port, a coolant selectively introducing unit connected to the inlet ports of the pumps and selectively introducing the coolant into the inlet ports of the pumps, check valves connected to the discharge ports of the pumps. Branched coolant supply pipes extend horizontally or downwardly from the check valves and have extending ends at which the branched pipes are integrated with each other. An integrated coolant supply pipe extends upward from the integrated extending ends of the branched pipes. And, a coolant discharge pipe with an on-off valve extends horizontally or downwardly from the integrated extending ends of the branched pipes.
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