公开(公告)号：EP1418388A2

公开(公告)日：2004-05-12

申请号：EP03078238.7

申请日：2003-10-14

申请人： OXFORD MAGNET TECHNOLOGY LIMITED

发明人： Huaiyu, Pan ,  Hughes, Timothy ,  White, Keith

IPC分类号： F25B9/14 ,  F25B25/00 ,  F28F1/24

CPC分类号： F28F1/124 ,  F25B9/10 ,  F25B9/145 ,  F25B2309/1408 ,  F25B2309/1412 ,  F25B2309/1414 ,  F25B2309/1415 ,  F25B2400/17 ,  F28F1/24

摘要： The present invention relates to pulse tube refrigerators for recondensing cryogenic liquids. In particular, the present invention relates to the same for magnetic resonance imaging systems. In many cryogenic applications components, e.g. superconducting coils for magnetic resonance imaging (mri), superconducting transformers, generators, electronics, are cooled by keeping them in contact with a volume of liquified gases (e.g. helium, neon, nitrogen, argon, methane). In a first aspect, the present invention provides pulse tube refrigerator (PTR) arrangement (90,101,103) within a cryogenic apparatus, wherein a regenerator tube (94,92) of the PTR is finned. In this configuration the fins or baffles (104,120,122,126,128,130,132,102), are believed to increase the surface area available for distributed heat transfer from the helium atmosphere to the regenerator.

摘要翻译： 本发明涉及用于再冷凝低温液体的脉冲管式冰箱。 特别地，本发明涉及磁共振成像系统。 在许多低温应用中，例如， 用于磁共振成像（mri），超导变压器，发电机，电子器件的超导线圈通过保持它们与一定体积的液化气体（例如氦气，氖气，氮气，氩气，甲烷）接触来冷却。 在第一方面，本发明提供了一种在低温装置内的脉冲管制冷器（PTR）装置（90,101,103），其中PTR的再生器管（94,92）翅片化。 在这种构造中，散热片或挡板（104,120,122,126,128,130,132,102）被认为增加了可用于从氦气氛到再生器的分布式热传递的表面积。

公开(公告)号：EP0773450B1

公开(公告)日：2002-12-18

申请号：EP96116418.3

申请日：1996-10-14

申请人： OXFORD MAGNET TECHNOLOGY LIMITED

发明人： Retz, Patrick William ,  White, Keith

IPC分类号： G01R33/3815 ,  H01F6/06

CPC分类号： G01R33/3815 ,  H01F6/065

公开(公告)号：EP0260036A3

公开(公告)日：1988-08-17

申请号：EP87307603

申请日：1987-08-27

申请人： OXFORD MAGNET TECHNOLOGY LIMITED

发明人： White, Keith

IPC分类号： F17C03/08 ,  F25B09/00 ,  G01N24/02

CPC分类号： G01R33/3815 ,  F17C3/085 ,  F25D19/006

摘要： A cryostat assembly comprises at least one substantially heat insulating wall (3) surrounding a cooled region for restricting heat flow into the cooled region. A refrigeration system (8) is provided having a heat absorbing portion coupled with the wall (3) to enable heat to transfer to the heat absorbing portion, the refrigeration system also having a heat evacuating portion to enable absorbed heat to be evacuated from the cryostat assembly.

摘要翻译： 低温恒温器组件包括围绕冷却区域的至少一个基本绝热壁（3），用于限制热量流入冷却区域。 提供了一种制冷系统（8），其具有与壁（3）连接的吸热部分，以使热能传递到吸热部分，制冷系统还具有排热部分，以使吸收的热量能够从低温恒温器中排出 部件。

公开(公告)号：EP1418388A3

公开(公告)日：2009-01-14

申请号：EP03078238.7

申请日：2003-10-14

申请人： Oxford Magnet Technology Limited

发明人： Huaiyu, Pan ,  Hughes, Timothy ,  White, Keith

IPC分类号： F25B9/14 ,  F25B25/00 ,  F28F1/24

CPC分类号： F28F1/124 ,  F25B9/10 ,  F25B9/145 ,  F25B2309/1408 ,  F25B2309/1412 ,  F25B2309/1414 ,  F25B2309/1415 ,  F25B2400/17 ,  F28F1/24

摘要： The present invention relates to pulse tube refrigerators for recondensing cryogenic liquids. In particular, the present invention relates to the same for magnetic resonance imaging systems. In many cryogenic applications components, e.g. superconducting coils for magnetic resonance imaging (mri), superconducting transformers, generators, electronics, are cooled by keeping them in contact with a volume of liquified gases (e.g. helium, neon, nitrogen, argon, methane). In a first aspect, the present invention provides pulse tube refrigerator (PTR) arrangement (90,101,103) within a cryogenic apparatus, wherein a regenerator tube (94,92) of the PTR is finned. In this configuration the fins or baffles (104,120,122,126,128,130,132,102), are believed to increase the surface area available for distributed heat transfer from the helium atmosphere to the regenerator.

公开(公告)号：EP0773450A1

公开(公告)日：1997-05-14

申请号：EP96116418.3

申请日：1996-10-14

申请人： OXFORD MAGNET TECHNOLOGY LIMITED

发明人： Retz, Patrick William ,  White, Keith

IPC分类号： G01R33/3815 ,  H01F6/06

CPC分类号： G01R33/3815 ,  H01F6/065

摘要： A super-conducting electro-magnet for use in an MRI system comprising a helium vessel (6) within which magnet windings (5) are positioned, a vacuum chamber (9) within which the helium vessel is contained, at least one thermal shield (11,12) positioned between the helium vessel and the vacuum chamber in spaced apart relationship, a service turret (15) including a refrigerator (13) thermally coupled to the said at least one shield for cooling purposes, a tube (50) which extends through the turret from the windings to facilitate filling, and conductors (57) which extend through the turret from the windings to facilitate current injection to the windings and to provide a vent for the helium gas.

摘要翻译： 一种用于MRI系统的超导电磁体，包括其中定位有磁体绕组（5）的氦容器（6），容纳氦容器的真空室（9），至少一个热屏蔽 11,12）以间隔开的关系定位在氦容器和真空室之间，服务转台（15）包括与所述至少一个屏蔽件热耦合以用于冷却目的的冰箱（13）;管（50），其延伸 通过来自绕组的转台以便于填充，以及从绕组延伸穿过转台的导体（57），以便于电流注入绕组并提供用于氦气的通风口。