| 摘要 |
PURPOSE:To achieve a drainage in a short time after a testing without providing a vacuum pump by providing an ejector and a bypass piping with a changeover valve in a hot water piping connecting a testing engine and a hot water tank. CONSTITUTION:In the warming process, an ejector pump 33 is started and when all valves 37, 39, 44, 51 and 52 are closed, a vacuum suction force generates in the ejector 32 by a hot water fed thereto sucked from a hot water tank 30 with the ejector pump 33 so that hot water in the hot water tank 30 is fed to the ejector 32 via pipings 47, 46, 39 and 35 and converges with the hot water from a piping 34, eventually fed to the hot water tank 30 for circulation. As the valves 37 and 49 are opened, a passage is changed over to a piping 38 and the engine 40 from the pipings 39 and 46 and a hot water circulates passing through the engine 40. In this manner, the hot water supply process to the engine 40 is conducted. After the testing of the engine 40, the valves 37 and 49 are closed and then, the valves 44 and 52 are opened and released to the atmosphere. As a result, water in the engine 40 is sucked from the inlet side of the engine 40 by a suction force of the ejector 32 and drained into the hot water tank 30. |
