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    • 3. 发明授权
    • Cryopump with electronically controlled regeneration
    • 低温电子控制再生
    • US5375424A
    • 1994-12-27
    • US23697
    • 1993-02-26
    • Allen J. BartlettStephen J. Yamartino
    • Allen J. BartlettStephen J. Yamartino
    • F04B37/08B01D8/00
    • F04B37/08Y10S417/901
    • In a fast partial regeneration process, the second stage of a cryopump is heated as purge gas is applied to the cryopump. In a test loop, the purge gas is turned off and the roughing valve is opened. If the cryopump is judged to be sufficiently empty of gases from the second stage by being roughed to a sufficiently low pressure in a short period of time the system proceeds to a reconditioning phase. If the system fails the test, however, it is repurged with a burst of warm purge gas and then retested. After passing the emptiness test, the pressure is further reduced by the roughing pump as heat is applied to the second stage. The heat is then turned off for cool down as the system continues to be rough pumped to a base pressure. At about the base pressure, the roughing valve is cycled to maintain the cryopump pressure at a level near to the base pressure. Where multiple cryopumps are coupled to a common roughing pump manifold, they are processed through a partial regeneration sequence in lock step to avoid cross contamination.
    • 在快速部分再生过程中,当吹扫气被施加到低温泵时,加热低温泵的第二阶段。 在测试循环中,关闭吹扫气体,打开粗压阀。 如果通过在短时间内将低温泵粗糙化到足够低的压力,则系统进入修复阶段,从而将低温泵判断为足够空的第二级的气体。 然而,如果系统测试失败,则会用一阵温和的吹扫气体重新测试,然后重新测试。 在通过空白试验之后,当加热到第二阶段时,由粗加工泵进一步降低压力。 然后,随着系统继续粗略地泵送到基础压力,然后将热量关闭以冷却。 在大约基本压力下,粗循环阀循环,以将低温泵压力保持在接近基本压力的水平。 当多个低温泵连接到普通的粗加工泵歧管时,它们通过锁定步骤中的部分再生序列进行加工,以避免交叉污染。
    • 5. 发明授权
    • Cryogenic recondenser with remote cold box
    • 低温冷凝器与遥控冷藏箱
    • US4766741A
    • 1988-08-30
    • US5082
    • 1987-01-20
    • Allen J. BartlettBruce R. AndeenPhilip A. Lessard
    • Allen J. BartlettBruce R. AndeenPhilip A. Lessard
    • F17C3/08F25B9/00F25B9/10F25J1/00F25J1/02F28F1/42H01F6/00H01F7/20F25B19/00
    • H01F6/00F17C3/085F25B9/00F28F1/42F17C2205/0326F17C2205/0347F17C2205/0355F17C2221/017F17C2223/0161F17C2223/033F17C2227/0353F17C2227/036F17C2250/0626F17C2250/0636F17C2265/012F17C2270/0509F17C2270/0536
    • A recondenser cycles a working volume of cryogen gas through a remote cold box and a coaxial recondensing, heat exchanger transfer line which is inserted into a cryostat. The working volume of gas is compressed to a high pressure and cooled through cooling means which include a mechanical refrigerator of the regenerator-displacer type. The cooled gas is expanded through a first JT valve to a medium pressure and further cooled. The further cooled medium pressure gas is transferred in a closed coaxial transfer line to a cryostat in which boil-off is recondensed. A second JT valve in the cryostat end of an inner tube coaxially positioned in an outer tube forming the transfer line expands the gas to a lower pressure and forms a liquid-gas mixture. The liquid-gas mixture is passed in heat exchange relation with the boil-off from an inner tube to an outer tube of a coaxial recondensing heat exchanger. The outer surface of the outer tube at the cryostat end of the transfer line has burrs which provide the necessary surface area on which to recondense the boil-off. The gas is transferred back to the cooling means through intermediate channels formed between the outer tube and the coaxially positioned inner tube.
    • 再冷凝器通过远程冷箱和插入低温恒温器的同轴再冷凝换热器输送管线循环冷冻剂气体的工作体积。 将气体的工作体积压缩至高压,并通过冷却装置冷却,冷却装置包括再生器置换器型机械式制冷机。 冷却的气体通过第一JT阀膨胀至中压并进一步冷却。 进一步冷却的中压气体在闭合的同轴输送管线中转移到冷凝器中,在该恒温器中再蒸发。 同轴地位于形成输送管的外管的内管的低温恒温器端中的第二JT阀将气体膨胀到较低压力并形成液态气体混合物。 液体 - 气体混合物与从内管到同轴再冷凝式热交换器的外管的蒸发热交换。 在输送管线的低温恒温器端部的外管的外表面具有毛刺,其提供必要的表面积以重新冷凝该蒸发。 通过形成在外管和同轴定位的内管之间的中间通道将气体转移回冷却装置。
    • 7. 发明授权
    • Temperature control of cryogenic systems
    • 低温系统的温度控制
    • US4679401A
    • 1987-07-14
    • US752354
    • 1985-07-03
    • Philip A. LessardAllen J. BartlettJohn F. Peterson
    • Philip A. LessardAllen J. BartlettJohn F. Peterson
    • B01D8/00F04B37/08
    • B01D8/00F04B37/08Y10S417/901
    • To control the temperature of one or more heat sinks of a cryogenic refrigerator in a cryopump, refrigerant gas to the refrigerator is diverted through heat exchangers associated with the refrigerator heat sinks. The diverted refrigerant gas may be used to maintain the temperature of the first stage cryopumping surfaces above some level to avoid cross over hangup. The second stage cryopumping surfaces may be warmed by the diverted refrigerant to some temperature level for partial regeneration. Both heat sinks may be warmed for full regeneration of the cryopump. Bleed flow of refrigerant gas cooled by the first stage of the refrigerator can be directed past a thermal mass to cool that mass. By reversing the flow of refrigerant gas during cooldown of the system, the thermal mass can be used to more rapidly cool the refrigerator. The thermal mass is thermally isolated from the refrigerator heat sinks and is positioned within the vacuum vessel of the cryopump adjacent to the first stage of the refrigerator.
    • 为了控制低温泵中的低温冰箱的一个或多个散热器的温度,通向与冰箱散热器相关联的热交换器将制冷剂气体输送到冰箱。 转向的制冷剂气体可用于将第一级低温泵的表面的温度保持在一定程度上,以避免交叉悬挂。 可将第二级低温泵送表面由转向制冷剂加热到一定温度以进行部分再生。 这两个散热片可能会被加热,以便低温泵完全再生。 由冰箱的第一级冷却的制冷剂气体的流出可以被引导通过热质量以冷却该质量。 通过在系统的冷却期间逆转制冷剂气体的流动,可以使用热质量来更快速地冷却冰箱。 热物质与冰箱散热器热隔离,并且位于与冰箱的第一级相邻的低温泵的真空容器内。