公开(公告)号：US06187987B1

公开(公告)日：2001-02-13

申请号：US09126256

申请日：1998-07-30

申请人： Arthur A. Chin ,  Bryan M. Knickerbocker ,  Jeffrey C. Trewella ,  Terry R. Waldron ,  Lloyd S. White

发明人： Arthur A. Chin ,  Bryan M. Knickerbocker ,  Jeffrey C. Trewella ,  Terry R. Waldron ,  Lloyd S. White

IPC分类号： C07C7144

CPC分类号： B01D67/0088 ,  B01D61/02 ,  B01D71/64 ,  C07C7/144 ,  C10G31/11 ,  C10G57/00 ,  C10G67/02

摘要： Permselective separation of aromatic hydrocarbons from non-aromatic hydrocarbons in a feed stream is accomplished using improved asymmetric membranes. The preferred membranes are fashioned from a polyimide and conditioned with a lubricating oil. Feed streams containing a mixture of aromatic and non-aromatic hydrocarbons are contacted with the dense active layer side of the polyimide membrane under a pressure and temperature sufficient to selectively permeate the desired aromatic hydrocarbon.

摘要翻译： 使用改进的不对称膜可以在进料流中选择性分离芳烃与非芳烃。 优选的膜由聚酰亚胺制成并用润滑油调理。 含有芳烃和非芳烃的混合物的进料流在聚酰亚胺膜的致密活性层侧在足以选择性渗透所需芳族烃的压力和温度下接触。

公开(公告)号：US5253484A

公开(公告)日：1993-10-19

申请号：US748429

申请日：1991-08-22

申请人： Randal A. Corman ,  Terry R. Waldron

发明人： Randal A. Corman ,  Terry R. Waldron

IPC分类号： B64D13/00 ,  H05K7/20 ,  B60H3/06

CPC分类号： H05K7/20554 ,  B64D13/00 ,  B64D2013/0614 ,  Y10S62/05

摘要： A high reliability cooling system for avionics provides a low-weight tertiary backup. A first source of cooling airflow (20) is directed through a first duct (28) to a first compartment (30, 32). A second source of cooling airflow (58) is directed through a second duct (68) to a second compartment (70, 74, 76, 78). A check valve (104) is located in the first duct (28) and permits airflow from said first source (20) to said first compartment (30, 32) and prevents a back-flow of air therethrough. An interconnecting duct (84) is provided between the first and second ducts (28, 68). The interconnecting duct (84) connects to the first duct (28) at a location between the check valve (104) and the first compartment (30). A shutoff valve (86) is located in the interconnecting duct (84) and is operable to open or close airflow therethrough. The invention provides three modes of operation. First, with the shutoff valve (86) closed, there are two separated avionic cooling systems. Second, in the event of failure of the second source cooling airflow (58), the shutoff valve (86) can be opened to allow the first source (20) to provide cooling airflow to all avionics. Third, in the event of failure of the first source of cooling airflow (20), the shutoff valve (86) can be opened and the second source (58) can supply cooling airflow to all critical avionics. The check valve (104) segregates airflow in this mode between critical and non-critical avionics.

摘要翻译： 用于航空电子设备的高可靠性冷却系统提供了低重量的三级备份。 第一冷却气流源（20）被引导通过第一管道（28）到第一隔室（30,32）。 冷却气流（58）的第二源被引导通过第二管道（68）到第二隔室（70,74,76,78）。 止回阀（104）位于第一管道（28）中并且允许从所述第一源（20）到所述第一隔室（30,32）的气流并且防止空气通过其中的逆流。 互连管道（84）设置在第一和第二管道（28,68）之间。 互连管道（84）在止回阀（104）和第一隔室（30）之间的位置处连接到第一管道（28）。 截止阀（86）位于互连管道（84）中并且可操作以打开或关闭气流。 本发明提供三种操作模式。 首先，截流阀（86）关闭，有两个分离的航空电子冷却系统。 第二，在第二源冷却气流（58）发生故障的情况下，可以打开截流阀（86），以允许第一源（20）为所有航空电子设备提供冷却气流。 第三，在第一冷却气流源20发生故障的情况下，可以打开截流阀86，第二源58可以向所有关键航空电子设备提供冷却气流。 止回阀（104）在该模式下在关键和非关键航空电子设备之间隔离气流。