| 摘要 |
PURPOSE:To discharge a coolant by only operating a valve by providing a pressurizer which is connected between the liquid phase section and gaseous phase section of a coolant container with pipes and provided on the outside of the coolant container and a liquid discharge pipe inserted into the coolant container until reaching the bottom. CONSTITUTION:Liquid nitrogen 4 is introduced into a pressurizer 12 by opening a pressure valve 13 after pole valves respectively fitted to a liquid nitrogen injecting port 9a and vaporized gas recovering port 9b are closed and a discharge valve 15 is opened. The liquid nitrogen introduced into the pressurizer 12 swells in volume by vaporization when the liquid nitrogen is heated by means of a heater 16 or makes heat exchange with air and the liquid nitrogen is sent to the gaseous phase section of a nitrogen container 3. The pressure inside the container 3 rises and the nitrogen 4 is discharged to the outside through a liquid nitrogen discharging pipe 14. Therefore, only when the valves are opened or closed, the liquid nitrogen can be discharged without making any preparatory works and using any nitrogen gas cylinder. |
