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1. 发明授权

US4625521A Liquid nitrogen distribution system 失效
标题翻译：液氮分配系统
公开(公告)号：US4625521A
公开(公告)日：1986-12-02
申请号：US733055
申请日：1985-05-13
申请人： John C. Murphy , Robert H. Swinderman
发明人： John C. Murphy , Robert H. Swinderman
IPC分类号： B01D8/00 , F17C13/00
CPC分类号： F17C13/001 , B01D8/00 , B64G2007/005 , F17C2221/014 , F17C2221/017 , F17C2223/0161 , F17C2225/0169 , F17C2227/0114 , F17C2227/0135 , F17C2250/01
摘要： Apparatus for providing a simulated space environment for the testing of articles under low temperature conditions comprising a liquid nitrogen head tank, liquid nitrogen subcooler pumps, a liquid nitrogen subcooler coil, a liquid nitrogen head tank makeup pumps, a low pressure liquid nitrogen storage tank, a high pressure liquid nitrogen storage tank, a liquid nitrogen transfer pump, a vacuum chamber and thermal simulation heat exchanger shrouds contained within the vacuum chamber. Appropriate internal and external piping connects these components so that the apparatus can be operated both in a subcooled pressurized closed loop system as well as in a gravity convection system. While liquid nitrogen in this apparatus will produce a stable uniform temperature of -297.degree. F. within the shroud containing the article to be tested, other liquids with similar low temperature characteristics may be used. A requirement for such liquids when used as a circulating medium with the apparatus herein is that the boiling point thereof at one atmosphere will produce the required test operating temperature.
摘要翻译：一种用于提供用于在低温条件下测试物品的模拟空间环境的装置，包括液氮罐，液氮过冷器泵，液氮过冷器线圈，液氮头罐补充泵，低压液氮储存罐，真空室内容纳的高压液氮储罐，液氮输送泵，真空室和热模拟热交换器罩。适当的内部和外部管道连接这些组件，使得设备可以在过冷加压闭环系统以及重力对流系统中操作。虽然该装置中的液氮将在包含待测试物品的护罩内产生-297°F的稳定的均匀温度，但是可以使用具有相似低温特性的其它液体。当用作本文设备的循环介质时，对这种液体的要求是其在一个大气压下的沸点将产生所需的测试工作温度。

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