JP2005246066A - 液冷式ゼロボイルオフ型mr磁石用の再凝縮器を除氷するためのシステム及び方法 - Google Patents
液冷式ゼロボイルオフ型mr磁石用の再凝縮器を除氷するためのシステム及び方法 Download PDFInfo
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- JP2005246066A JP2005246066A JP2005060727A JP2005060727A JP2005246066A JP 2005246066 A JP2005246066 A JP 2005246066A JP 2005060727 A JP2005060727 A JP 2005060727A JP 2005060727 A JP2005060727 A JP 2005060727A JP 2005246066 A JP2005246066 A JP 2005246066A
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- magnet
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- 238000001816 cooling Methods 0.000 title claims abstract description 79
- 239000007788 liquid Substances 0.000 title abstract description 26
- 238000000034 method Methods 0.000 title abstract description 21
- 238000010257 thawing Methods 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000002826 coolant Substances 0.000 claims description 17
- 230000005684 electric field Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 239000001307 helium Substances 0.000 description 74
- 229910052734 helium Inorganic materials 0.000 description 74
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 238000002595 magnetic resonance imaging Methods 0.000 description 12
- 238000010791 quenching Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 230000000171 quenching effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002887 superconductor Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 210000003855 cell nucleus Anatomy 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/006—Thermal coupling structure or interface
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
- G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
- G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General 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
- F25B2400/17—Re-condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
Abstract
【解決手段】 本システム及び方法は、着氷した粒子(122、124、126)を再凝縮システム(76)から溶解させるように構成された少なくとも1つの加熱素子(106)を含む。電力供給回路(112)が含まれ、該電力供給回路(112)は、少なくとも1つの抵抗性加熱素子(106)に電力を供給するように構成されて、少なくとも1つの抵抗性加熱素子(106)が、着氷した粒子(122、124、126)を再凝縮器システム(76)から溶解させるのに充分な熱源を供給するようになっている。
【選択図】 図2
Description
52 液冷式超伝導MR磁石システム
54 超伝導磁石
70 冷却システム
72 液体ヘリウム浴
76 冷却ループ
78 ガス状ヘリウム
80 磁石ヘリウム容器
82 供給管
84 再凝縮器
86 送出管
88 磁石真空容器
89 内部ボアセクション
90 圧力レリーズ弁
92 補助冷却ループ
94 熱シールド
98 真空弁システム
100 再凝縮器除氷システム
102 真空弁
104 圧力計
106a〜c 加熱素子
108 真空ポンプ
110 電源
111 フィードスルー
112 電力供給回路
Claims (10)
- MRシステム(10)の再凝縮器を除氷するためのシステムであって、
密封容器(80、88)内に超伝導磁石(54)を有するMRシステム(10)と、
着氷した粒子(122、124、126)をそれから溶解させるように構成された少なくとも1つの加熱素子(106)を含む、前記超伝導磁石(64)を冷却するように構成された再凝縮システム(76)と、
前記少なくとも1つの加熱素子(106)が前記着氷した粒子(122、124、126)を前記再凝縮システム(76)から溶解させるのに充分な熱源を供給するように、該少なくとも1つの加熱素子(106)に電力を供給するように構成された電力供給回路(112)と、
を含むシステム。 - 前記溶解した粒子(122、124、126)を前記再凝縮システム(76)から除去するように構成された真空供給源(108)をさらに含む、請求項1記載のシステム。
- 前記真空供給源(108)が、昇華した粒子を補助冷却ループ(92)を介して除去するように構成されている、請求項2記載のシステム。
- 冷却ループ(92)を介して前記再凝縮システム(76)に接続されかつ前記真空供給源(108)を制御するように構成された真空供給弁(102)と、
前記真空供給弁(102)に接続された圧力計(104)と、
をさらに含む請求項2記載のシステム。 - 前記圧力計(104)が、前記真空供給弁(102)を作動させるべき時点を指示するように構成されている、請求項4記載のシステム。
- 前記圧力供給弁(102)及び圧力計(104)が、再凝縮器着氷を示す圧力上昇を指示した時に圧力レリーズ弁(90)に置き代わるように構成されている、請求項4記載のシステム。
- 前記密封容器(80、88)が、大気の流入に対して加圧密封されている、請求項1記載のシステム。
- 前記電力供給回路(112)が、前記加圧密封容器(80、88)内への電気的フィールドスルー(111)を介して前記少なくとも1つの加熱素子(106)に電力を供給するように構成されて、電源(110)が該電力供給回路(112)に接続された時に、前記少なくとも1つの加熱素子(106)が熱を発生するようになっている、請求項7記載のシステム。
- 前記加圧密封容器(80、88)が、前記着氷した粒子(122、124、126)を溶解させる間、加圧密封状態を維持するように構成されている、請求項7記載のシステム。
- 前記再凝縮システム(76)が、ガス状冷却媒体を冷却するための複数の熱交換フィン(116)を含み、かつ密閉サイクル冷凍機(76)によって冷却されるように構成されている、請求項1記載のシステム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/708,477 | 2004-03-05 | ||
US10/708,477 US7305845B2 (en) | 2004-03-05 | 2004-03-05 | System and method for de-icing recondensor for liquid cooled zero-boil-off MR magnet |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005246066A true JP2005246066A (ja) | 2005-09-15 |
JP4745687B2 JP4745687B2 (ja) | 2011-08-10 |
Family
ID=34435651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005060727A Expired - Fee Related JP4745687B2 (ja) | 2004-03-05 | 2005-03-04 | 液冷式ゼロボイルオフ型mr磁石用の再凝縮器を除氷するためのシステム及び方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7305845B2 (ja) |
JP (1) | JP4745687B2 (ja) |
CN (1) | CN100528077C (ja) |
DE (1) | DE102005010482B4 (ja) |
GB (1) | GB2413173B (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0426838D0 (en) * | 2004-12-07 | 2005-01-12 | Oxford Instr Superconductivity | Magnetic apparatus and method |
US7665312B2 (en) * | 2006-01-25 | 2010-02-23 | Koninklijke Philips Electronics N.V. | Method of using a system including an assembly exposed to a cryogenic region |
DE102006005285A1 (de) * | 2006-02-06 | 2007-08-16 | Siemens Ag | Magnetresonanzeinrichtung sowie Verfahren zur Überwachung einer Magnetresonanzeinrichtung |
US7449889B1 (en) * | 2007-06-25 | 2008-11-11 | General Electric Company | Heat pipe cooled superconducting magnets with ceramic coil forms |
US7789937B2 (en) * | 2007-09-25 | 2010-09-07 | Hess Spencer W | System and method for recovering ice-clad machinery and equipment |
WO2010032171A1 (en) * | 2008-09-22 | 2010-03-25 | Koninklijke Philips Electronics, N.V. | Neck deicer for liquid helium recondensor of magnetic resonance system |
GB2467527A (en) * | 2009-02-03 | 2010-08-04 | Siemens Magnet Technology Ltd | Detection of frozen deposits due to air ingress into cryogen vessels by change in resonant frequency of tensioned wire |
US8294316B2 (en) * | 2009-07-28 | 2012-10-23 | Rolls-Royce North American Technologies, Inc. | Electrical power generation apparatus for contra-rotating open-rotor aircraft propulsion system |
US8729894B2 (en) * | 2010-07-30 | 2014-05-20 | General Electric Company | System and method for operating a magnetic resonance imaging system during ramping |
EP2761237B1 (en) * | 2011-09-28 | 2019-05-08 | Koninklijke Philips N.V. | Very efficient heat exchanger for cryogen free mri magnet |
KR101247263B1 (ko) * | 2011-11-14 | 2013-03-25 | 삼성전자주식회사 | 탈부착형 전류 도입선 유닛 및 이를 채용한 초전도 자석 장치 |
WO2013114523A1 (ja) | 2012-01-30 | 2013-08-08 | 三菱電機株式会社 | 超電導マグネット |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6389212A (ja) * | 1986-09-30 | 1988-04-20 | Izumo Sangyo Kk | エンドミル |
US5060481A (en) * | 1989-07-20 | 1991-10-29 | Helix Technology Corporation | Method and apparatus for controlling a cryogenic refrigeration system |
JPH10332458A (ja) * | 1997-05-27 | 1998-12-18 | Furukawa Electric Co Ltd:The | 極低温冷媒液面計 |
JPH11317307A (ja) * | 1998-02-18 | 1999-11-16 | General Electric Co <Ge> | ゼロ・ボイルオフ冷凍剤冷却式再凝縮形超伝導磁石集成体 |
JP2002270913A (ja) * | 2001-03-09 | 2002-09-20 | Hitachi Ltd | 超電導コイル装置、mri装置 |
JP2002320600A (ja) * | 2001-04-12 | 2002-11-05 | Ge Medical Systems Global Technology Co Llc | 医用イメージング・デバイスの冷却を調節するための方法及びシステム |
Family Cites Families (3)
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US5848532A (en) * | 1997-04-23 | 1998-12-15 | American Superconductor Corporation | Cooling system for superconducting magnet |
US5782095A (en) * | 1997-09-18 | 1998-07-21 | General Electric Company | Cryogen recondensing superconducting magnet |
KR100445480B1 (ko) * | 2001-12-21 | 2004-08-21 | 엘지전자 주식회사 | 냉장고의 제상히터 어셈블리 |
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2004
- 2004-03-05 US US10/708,477 patent/US7305845B2/en active Active
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2005
- 2005-03-02 GB GB0504299A patent/GB2413173B/en not_active Expired - Fee Related
- 2005-03-03 CN CNB2005100518914A patent/CN100528077C/zh active Active
- 2005-03-04 JP JP2005060727A patent/JP4745687B2/ja not_active Expired - Fee Related
- 2005-03-04 DE DE102005010482.7A patent/DE102005010482B4/de not_active Expired - Fee Related
Patent Citations (6)
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JPS6389212A (ja) * | 1986-09-30 | 1988-04-20 | Izumo Sangyo Kk | エンドミル |
US5060481A (en) * | 1989-07-20 | 1991-10-29 | Helix Technology Corporation | Method and apparatus for controlling a cryogenic refrigeration system |
JPH10332458A (ja) * | 1997-05-27 | 1998-12-18 | Furukawa Electric Co Ltd:The | 極低温冷媒液面計 |
JPH11317307A (ja) * | 1998-02-18 | 1999-11-16 | General Electric Co <Ge> | ゼロ・ボイルオフ冷凍剤冷却式再凝縮形超伝導磁石集成体 |
JP2002270913A (ja) * | 2001-03-09 | 2002-09-20 | Hitachi Ltd | 超電導コイル装置、mri装置 |
JP2002320600A (ja) * | 2001-04-12 | 2002-11-05 | Ge Medical Systems Global Technology Co Llc | 医用イメージング・デバイスの冷却を調節するための方法及びシステム |
Also Published As
Publication number | Publication date |
---|---|
US20050193745A1 (en) | 2005-09-08 |
GB0504299D0 (en) | 2005-04-06 |
CN1672632A (zh) | 2005-09-28 |
US7305845B2 (en) | 2007-12-11 |
GB2413173B (en) | 2008-12-31 |
GB2413173A (en) | 2005-10-19 |
DE102005010482A1 (de) | 2005-09-22 |
DE102005010482B4 (de) | 2014-10-16 |
JP4745687B2 (ja) | 2011-08-10 |
CN100528077C (zh) | 2009-08-19 |
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