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1. WO2003036190 - A PULSE TUBE REFRIGERATOR WITH AN INSULATING SLEEVE

Publication Number WO/2003/036190
Publication Date 01.05.2003
International Application No. PCT/EP2002/011882
International Filing Date 21.10.2002
Chapter 2 Demand Filed 09.05.2003
IPC
F25B 9/14 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
9Compression machines, plant, or systems, in which the refrigerant is air or other gas of low boiling point
14characterised by the cycle used, e.g. Stirling cycle
CPC
F25B 2309/1408
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2309Gas cycle refrigeration machines
14Compression machines, plant or systems characterised by the cycle used
1408Pulse-tube cycles with pulse tube having U-turn or L-turn type geometrical arrangements
F25B 2309/1413
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2309Gas cycle refrigeration machines
14Compression machines, plant or systems characterised by the cycle used
1413Pulse-tube cycles characterised by performance, geometry or theory
F25B 2309/1414
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2309Gas cycle refrigeration machines
14Compression machines, plant or systems characterised by the cycle used
1414Pulse-tube cycles characterised by pulse tube details
F25B 2309/1415
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2309Gas cycle refrigeration machines
14Compression machines, plant or systems characterised by the cycle used
1415Pulse-tube cycles characterised by regenerator details
F25B 2309/1421
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2309Gas cycle refrigeration machines
14Compression machines, plant or systems characterised by the cycle used
1421Pulse-tube cycles characterised by details not otherwise provided for
F25B 2400/17
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
2400General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
17Re-condensers
Applicants
  • OXFORD MAGNET TECHNOLOGY LTD. [--]/[GB] (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CR, CU, CY, CZ, DE, DK, DM, DZ, EE, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZM, ZW)
  • DANIELS, Peter, Derek [GB]/[GB] (UsOnly)
  • DAVIES, Francis, John [GB]/[GB] (UsOnly)
  • STAUTNER, Wolfgang, Ernst [--]/[GB] (UsOnly)
  • STEINMEYER, Florian [DE]/[GB] (UsOnly)
Inventors
  • DANIELS, Peter, Derek
  • DAVIES, Francis, John
  • STAUTNER, Wolfgang, Ernst
  • STEINMEYER, Florian
Agents
  • ALLEN, Derek
Priority Data
0125189.119.10.2001GB
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A PULSE TUBE REFRIGERATOR WITH AN INSULATING SLEEVE
(FR) REFRIGERATEUR A TUBE PULSE COMPORTANT UNE GAINE D'ISOLATION
Abstract
(EN) 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). Any dissipation in the components or heat getting into the system causes the volume to part boil off. To account for the losses, replenishment is required. This service operation is considered to be problematic by many users and great efforts have been made over the years to introduce refrigerators that recondense any lost liquid right back into the bath. The present invention addresses the problems arising from convection which occurs within a pulse tube refrigerator. The invention provides. In a first aspect, the present invention provides a pulse tube refrigerator PTR in a sock, which connects room temperature to a cryogenic reservoir; wherein each of one or more pulse tubes and regenerator tubes of the PTR is covered with an insulating sleeve, whereby to reduce heat transfer between the tubes and between the tubes and the surrounding sock. This configuration has been shown to reduce convection and problems associated therewith.
(FR) La présente invention concerne des réfrigérateurs à tube pulsé destinés à recondenser des liquides cryogéniques, notamment dans des systèmes d'imagerie par résonance magnétique. Dans de nombreuses applications, les composants tels que des bobines supraconductrices d'imagerie par résonance magnétique (IRM), des transformateurs supraconducteurs, des générateurs, et d'autres éléments électroniques sont refroidis par mise en contact avec un volume de gaz liquéfié (par ex. hélium, néon, azote, argon, méthane). Toute dissipation dans les composants ou de la chaleur parvenant dans le système provoque une évaporation partielle dudit gaz, nécessitant ainsi un remise à niveau de ce dernier. L'invention vise à résoudre le problème de convection survenant dans un réfrigérateur à tube pulsé. Dans un premier mode de réalisation, le réfrigérateur à tube pulsé est logé dans une douille reliée à un réservoir cryogénique, chaque tube pulsé ou tube de régénération du réfrigérateur à tube pulsé étant recouvert d'une gaine d'isolation de manière à réduire le transfert thermique entre les tubes ainsi qu'entre les tubes et la douille. Ainsi, il est possible de réduire la convection et les problèmes qui en découlent.
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