| 摘要 |
PURPOSE:To simplify the extracting means of gas in the main body of a vessel as well as the arrangement of pipelines by a method wherein an extracting unit, whose one end is communicated with either one of first, second and third gas flow passages while the other end of the same forms a gas extracting flow passage for extracting gas from main body of the vessel into the inside of the same, is provided. CONSTITUTION:At least one of a first opening part 11a and a second opening part 13a is opened is gas phase refrigerant 5b at all times and, therefore, only the gas phase refrigerant 5b will never be extracted to the outside of the main body 4 of a vessel while keeping the condition of fluid as it is even if a moving body is accelerated or decelerated. Further, there is no U-shaped bent part like as the gas extracting pipe so far and, therefore, any unnecessary space will never be occupied except the flow space of gas when the diameters of respective pipelines 11-13 are minimized within a necessary range while a first gas extracting pipe 14 may be reduced than any embodiment so far. On the other hand, the outer periphery of the intermediate part of the same pipe is covered with a third pipeline 13 and, therefore, the appearance of the first gas extracting pipe 14 may be simplified more than conventional one. |
