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1. 发明授权

US5317878A Cryogenic cooling apparatus 失效
标题翻译：低温冷却装置
公开(公告)号：US5317878A
公开(公告)日：1994-06-07
申请号：US923901
申请日：1992-08-20
申请人： Thomas W. Bradshaw , Anna H. Orlowska
发明人： Thomas W. Bradshaw , Anna H. Orlowska
IPC分类号： F25B9/02 , F25B9/00 , F25D17/02 , F25B19/02
CPC分类号： F25D17/02 , F25B9/00
摘要： The invention provides a controlled connection, or heat switch, between a source of cryogenic cooling and an item which is to be cooled, using control valve means which is not itself subjected to the cryogenic temperatures involved. In one aspect, the invention provides cooling means, comprising a source of flow of a fluid, a supply line for supplying fluid from said source to a first heat exchanger, where it is cooled by a source of cryogenic cooling, and thereafter to a second heat exchanger where it is in heat-exchanging relationship with an item to be cooled by the cryogenic cooling source, and a return line for return flow of the fluid from the second heat exchanger to the fluid flow source, the return line and the supply line between the fluid flow source and the first heat exchanger being in heat exchange relationship with one another in a third heat exchanger, wherein between the fluid flow source and the third heat exchanger there is included in the supply line or the return line a control valve whereby the flow of fluid through the supply line and from the first to the second heat exchanger can be controlled. One embodiment is constituted by a multi-stage cryogenic cooling apparatus having a closed-loop Joule-Thomson expansion the compressor via a low-pressure return line), and a Joule-Thomson stage heat exchanger in which the high-pressure line and the low-pressure return line are in heat-exchanging relationship, and the pre-cooler stage being arranged to pre-cool gas in the high-pressure line before it enters the Joule-Thomson stage heat exchanger, wherein the high-pressure gas line of the Joule-Thomson stage is provided, upstream of its interaction with the pre-cooler stage, with a branch leading through a bypass valve.
摘要翻译： PCT No.PCT / GB91 / 00311 Sec。 371日期：1992年8月20日 102（e）日期1992年8月20日PCT 1991年2月28日PCT PCT。公开号WO91 / 14141 日期1991年9月19日。本发明提供了一种受控制的连接或热开关，在低温冷却源和待冷却的物品之间，使用不受其所涉及的低温温度的控制阀装置。在一个方面，本发明提供了冷却装置，其包括流体源，用于将流体从所述源供应到第一热交换器的供应管线，在那里通过低温冷却源冷却，然后到第二热交换器，其与待冷却的物品与低温冷却源处于热交换关系;以及返回管线，用于将流体从第二热交换器返回到流体流动源，回流管线和供应管线在所述流体流动源和所述第一热交换器之间在第三热交换器中彼此处于热交换关系中，其中在所述流体流动源和所述第三热交换器之间包括在所述供应管线或所述返回管路中的控制阀，可以控制通过供应管线和从第一到第二热交换器的流体流动。一个实施例由多级低温冷却装置构成，其具有通过低压回流管线将压缩机经由闭环焦耳汤姆逊膨胀）和焦耳 - 汤姆逊级热交换器，其中高压管路和低压管路压力回流管线处于热交换关系，并且预冷器阶段被布置成在进入焦耳 - 汤姆逊级热交换器之前将高压管线中的气体预冷却，其中高压气体管线焦耳汤姆逊阶段在与预冷器阶段相互作用的上游提供，分支通过旁通阀。

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