GB2513590A - Efficient thermal joint from the second stage of a coldhead to a condensing heat exchanger - Google Patents

Efficient thermal joint from the second stage of a coldhead to a condensing heat exchanger Download PDF

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Publication number
GB2513590A
GB2513590A GB201307783A GB201307783A GB2513590A GB 2513590 A GB2513590 A GB 2513590A GB 201307783 A GB201307783 A GB 201307783A GB 201307783 A GB201307783 A GB 201307783A GB 2513590 A GB2513590 A GB 2513590A
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GB
United Kingdom
Prior art keywords
refrigerator
stage
sock
heat exchanger
cooling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB201307783A
Other versions
GB2513590B (en
GB201307783D0 (en
Inventor
Neil Charles Tigwell
Kevin Paul Wastie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens PLC
Original Assignee
Siemens PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens PLC filed Critical Siemens PLC
Priority to GB1307783.9A priority Critical patent/GB2513590B/en
Publication of GB201307783D0 publication Critical patent/GB201307783D0/en
Priority to CN201811208554.5A priority patent/CN109612192A/en
Priority to KR1020177031646A priority patent/KR102095739B1/en
Priority to CN201811208931.5A priority patent/CN109612193B/en
Priority to KR1020157033276A priority patent/KR101805075B1/en
Priority to US14/787,148 priority patent/US10181372B2/en
Priority to CN201480023258.1A priority patent/CN105229397B/en
Priority to PCT/EP2014/057900 priority patent/WO2014173809A1/en
Publication of GB2513590A publication Critical patent/GB2513590A/en
Application granted granted Critical
Publication of GB2513590B publication Critical patent/GB2513590B/en
Priority to US16/183,928 priority patent/US20190074117A1/en
Priority to US16/183,851 priority patent/US20190074116A1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • F17C13/005—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure
    • F17C13/006—Details of vessels or of the filling or discharging of vessels for medium-size and small storage vessels not under pressure for Dewar vessels or cryostats
    • 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
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/086—Mounting arrangements for vessels for Dewar vessels or cryostats
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • F17C3/085—Cryostats
    • 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
    • F25B9/10—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point with several cooling stages
    • 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
    • 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
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use
    • F17C2270/0527—Superconductors
    • F17C2270/0536—Magnetic resonance imaging

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Containers, Films, And Cooling For Superconductive Devices (AREA)

Abstract

A mounting assembly for cryogenic refrigerator (17) having a cooling stage (24) comprising a sock (15) accommodating the cooling stage and part of the refrigerator. A mechanical fastener (38) is provided, mechanically clamping the cooling stage of the refrigerator into contact with a cooled component, the mechanical fastener being accessible from the exterior of the sock by a removable port (44) in the sock. The refrigerator may be a two-stage one having first (30) and second (32) stages, and the sock may also be a two-stage one.

Description

EFFICIENT THERMAL JOINT
FROM THE SECOND SCAGE OF A COLDHEAD
TO A CONDENSING HEAT EXCHANGER
The present invention relates to improved arrangements for providing thermal connection between a cryogenic refrigerator and cooled components, wherein the refrigerator is removable, and the thermal connection must be capable of being broken and re-made without discernable increase in thermal resistance.
The present invention is described in the context of a cryogenic refrigerator cooling to temperatures of about 4.2K for re-condensing helium in a cryostat used for cooling superconducting magnets for MRI systems.
Fig. 1 shows a conventiona arrangement of a cryostat including a cryogen vessel 12. A cooled superconducting magnet 10 is provided within cryogen vessel 12, itself retained within an outer vacuum chamber (OVC) 14. One or more thermal radiation shields 16 are provided in the vacjum space between the cryogen vessel 12 and the outer vacuum chamber 14.
In some known arrangements, a refrigerator 17 is mounted in a refrigerator sock 15 located in a turret 18 provided for the purpose, towards the side of the cryostat. Alternarively, a refrigerator 17 may be located within access turret 19, which retains access neck (vent tube) 20 mounted at the top of the cryostat. The refrigerator 17 provides active refrigeration to cool cryogen gas within the cryogen vessel 12, in some arrangements by recondensing it into a liguid. As illustrated in Fig. 1, the refrigerator 17 may be a two-stage refrigerator. A first cooling stage 22 is thermally linked to the radiation shield 16, and provides cooling to a first temperature, typically in the region of 80-lOOK. A second cooling stage 24 provides cooling of the cryogen gas to a much lower temperature, typically in the region of 4-10K.
Typically, a two-stage refrigerator provides high-power cooling to a first cryogenic temperature and lower-power cooling to a much lower cryogenic temperature, as illustrated in Fig. 1. In current cryogenic refrigerators, the first stage may provide about 44W of cooling to 50K and about 1W of cooling at about 4K.
In some conventional systems, a second stage heat exchanger is exposed to a gaseous cryogen environment -in the present example, gaseous helium within cryogen vessel 12. The second stage is cooled to a temperature below the boiling point of the cryogen, which condenses onto the second stage heat exchanger. Such arrangements provide direct contact between cryogen and second stage heat exchanger, but care must be taken when removing and replacing the refrigerator, since air will tend to be drawn into the cryogen vessel, where it will freeze onto surfaces, and may cause dangerous blockages. The service operation of removing and replacing the refrigerator with the magnet at field is also a hazardous operation, as a guench could take place while the refrigerator is absent, placing a service technician at risk from exposure to liquid and gaseous cryogen.
In some known arrangements, the second stage heat exchanger is exposed directly to the interior of the cryogen vessel. In other arrangements, the second stage heat exchanger is exposed to the interior of a separate heat exchanger, provided for the purpose, which is linked to the interior of the cryogen vessel by one or more pipes or apertures. Tn yet further arrangements, the second stage heat exchanger is exposed to the interior of a relatively small cryogen vessel provided for the purpose and separate from the main cryogen vessel.
Recondensation takes place within the small cryogen vessel for the purpose of transferring cooling power from the refrigerator to a thermal bus bar which is thermally linked to a further heat exchanger which is exposed to the interior of the cryogen vessel.
Rather than the immersion cooling illustrated in Fig. 1, a thermosiphon may be provided for cooling the superconducting magnet. In a thermosiphon arrangement, a closed circuit is provided, including a thermally conductive pipe in thermal contact with the superconducting magnet and a heat exchanger which is cooled by a cryogenic refrigerator. Such arrangements may prove difficult to implement, however, as they may require the heat exchanger to be positioned at the top of the cryostat. Placing the refrigerator also at the top of the cryostat may make the refrigerator difficult to access for servicing operations, and may increase the height of the overall system, which may be problematic for installation.
By using a thermal bus bar, mentioned above, it is possible to lower the refrigerator while maintaining a heat exchanger at the top of the thermosiphon. A double-recondensing arrangement may be provided, mentioned above, in which a separate recondensing chamber is used to provide the thermal interface between the cryogenic refrigerator and the thermal bus bar. Such double-recondensing arrangements may be found difficult to establish such that recondensation reliably takes place at both ends of the thermal bus bar. Alternatively, a hard mechanical contact may be employed, in which the second stage heat exchanger is pressed into mechanical contact with the bus bar. This is typically arranged by careful selection of the length of the sock housing the refrigerator: particularly the distance between first and second stages of the sock; and between first and second stages of the refrigerator. Thermal contact between the first stage of the refrigerator and the first stage of the sock may be achieved by direct mechanical contact, in which the first stage of the refrigerator and the first stage of the sock are provided by solid metal pieces with conplementary tapers. Due to dimensional variation inherent in the manufacturing processes, it is difficult to reliably achieve an appropriate mechanical pressure between the second stage of the refrigerator and a second stage of the sock, arranged in contact with the thermal bus bar as well as an appropriate mechanical pressure between the first stage of the refrigerator and the first stage of the sock. The second stage of the sock is typically placed at the closed end of the sock, and so the distance between the first stage of the sock and the second stage of the sock is fixed during construction of the sock. It must also be possible to remove the refrigerator from the sock for servicing and replace or substitute it, yet achieve an acceptable thermal contact with the thermal bus bar when the refrigerator is re-installed.
The present invention provides an efficient thermal joint between the second stage of a refrigerator and a cooled component such as a condensing heat exchanger.
The present invention addresses the problems discussed above and provides apparatus as defined in the appended claims.
The above, and further, objects, characteristics and advantages of the invention will become more apparent from the following description of certain embodiments thereof, in conjunction with the accompanying drawings, wherein: Fig. 1 represents a radial cross-section through a conventional cryostat containing a superconducting magnet; Fig. 2 illustrates a cross-section through a refrigerator and mounting arrangement according to an embodiment of the present invention; Fig. 3 represents a cross-section of a mounting arrangement for a cryogenic refrigerator according to an aspect of the present invention; and Figs. 4-5 show schematic representations of other embodiments of the present invention.
According to a feature of the present invention, the second stage of the refrigerator is mechanically attached to a cooled component by one or more bolts or similar mechanical fasteners. Preferably, the mechanical fastener is accessible from the exterior of the sock, and of the OVC. A sealed port may be provided to allow access to the fastener when required for removal or installation of a cryogenic refrigerator.
Fig. 2 illustrates an example embodiment of the present invention, in which the cryogenic refrigerator 17 is inverted, such that the second stage 24 of the refrigerator is above the first stage 22 of the refrigerator, and the closed end of the 3ock 15 is above the open end. Such an arrangement allow5 heat exchanger 30 to be more ea5ily po3itioned at the top of the thermosiphon, but the present invention extends also to arrangements in which the refrigerator is mounted more conventionally, with the second stage 24 below the first stage 22, and the closed end of the sock 15 below the open end of the sock.
In the illustrated embodiment, heat exchanger 30 is provided, which is a part of a thermosiphon arrangement. Thermosiphon tubes 32 are connected to the heat exchanger 30 through the wall of the sock 15. The heat exchanger 30 defines a chamber which is cooled by the cryogenic refrigerator 17. In use, relatively warm cryogen gas will enter chamber 35 of the heat exchanger 30 through an inlet port 34. Heat 15 extracted from the cryogen, which may recondense into a liquid. The cooled, preferably liquid, cryogen flows from outlet port 36 to recirculate around the cooling loop through tubes 32. Inlet and outlet ports 34, 36 preferably include a flexible element, such as the bellows illustrated. This allows some relative movement of heat exchanger 30 to compensate for mechanical misalignment and differences in thermal contraction.
According to a feature of the present invention, the heat exchanger 30 is attached to the second stage 24 of the refrigerator by one or more bolts 38 or similar mechanical fastening which allows a controlled interface pressure to be achieved between the heat exchanger 30 and the second stage 24 of the refrigerator. Locating means, such as a peg and cavity, may be provided to assist with locating the heat exchanger 30 onto the second stage 24 of the refrigerator.
Preferably, the location of the heat exchanger may be moved by a certain extent, independently of the location of the closed end of the sock.
In an embodiment, the heat exchanger 30 and inlet and outlet ports 34, 36 are assembled into the sock during its manufacture. The sock is then assembled into the OVO 14, preferably within the turret 18. Later during the assembly process, the refrigerator 17 is installed within the sock 15 so that the second stage 24 of the refrigerator interfaces with the heat exchanger 30. Fastener 38 is then tightened to apply a required interface pressure between the heat exchanger and the second stage 24 of the refrigerator. Preferably, the fastener is captive to the heat exchanger, to facilitate this assembly step. In an alternative arrangement, the heat exchanger 30 may be provided with a through-hole, and a threaded stud may be provided, protruding from the second stage of the refrigerator such that, when installed, the threaded stud passes through the hole in the heat exchanger and a threaded nut can be applied to the stud, to provide the required mechanical fastening.
An access port 40 is provided, allowing a technician to gain access to the fastener 38 within the sock, from outside of the OVC. As shown in Fig. 2, this may be achieved simply by placing an access port directly opposite the fastener(s) 38.
The port should be arranged to isolate the interior of the sock 15 from the interior of the OVO 14. As illustrated, this may be achieved by attaching a bellows 42 between an access into the sock and the port 40 fn the OVC. The bellows should be of a thermally insulating material to limit the influx of heat by conduction through the material of the port. Baffles, which may be removable, may be positioned within the port to reduce thermal influx by radiation from the port 40. Thermal radiation shields 16 should be placed between the sock 15 and the OVC 14 to reduce thermal influx to the sock from the material of the OVC. Typically, multi-layer insulation such as sheets of aluminized polyester will also be provided between the OVC 14 and the thermal radiation shield 16.
The port 40 itself may take a variety of forms. Tn the illustrated example, a plug 44 is provided with 0-ring seals 46, and is largely held in place by differential pressure.
Atmospheric pressure acts on the outer surface of the plug 44 while the vacuum within the sock acts in the inner surface of the plug. Preferably, a valve 48 is provided in the plug 44 to enable a vacuum within the sock 15 to be released in preparation for removal of the refrigerator. The same valve may be used for initially drawing the vacuum in the sock.
Fig. 3 shows a view, similar to the view of Fig. 2, but of the mounting arrangement 50 only, with the refrigerator 17 and port plug 44 removed. The first stage 52 of the sock is shown, and the taper is visible. As described above, this taper assists in locating the refrigerator 17 within the sock 15, and in providing an effective thermal contact between the first stage 22 of the refrigerator and the first stage of the sock. First stage 52 of the sock is thermally joined 54 to the thermal radiation shield 16 to provide cooling of the thermal radiation shield to approximately the temperature of the first stage 22 of the refrigerator.
The arrangement shown in Figs. 2-3, where the heat exchanger forms a part of the cooling loop, is very efficient, since all of the cryogen passes through the heat exchanger. Other arrangements may be provided, within the scope of the invention, for example heat exchanger 30 may be connected to a cryogen vessel 12 as shown in Fig. 1 by one or more tubes 32.
The heat exchanger 30 which carries the cryogen flow may be replaced by a thermal bus bar in mechanical contact with the second 3tage 24 of the refrigerator. The sock 15 may be closed, as is conventional, by a second stage, and a mechanical fastener such as a captive bolt may be provided in the thermal bus bar, to extend through a hole in the second stage of the sock into a threaded hole in the second stage of the refrigerator.
For example, a more conventional arrangement may be provided, in which the sock 15 has first 52 and second stages, each contacting corresponding first and second stages of the cryogenic refrigerator when in use, with one or more mechanical fasteners provided to ensure effective thermal contact between the second stage of the refrigerator and the second stage of the sock. However, access must be provided through a re-sealable port to provide access to tighten and loosen the fasteners as required. In the arrangement represented in Fig. 5, second stage 54 of sock 15 comprises a thermally conductive block, for example of copper.
Protrusions 56 are provided, extending adjacent to the second stage 24 of the refrigerator. A releasable compression band 58, such as the commonly-known Jubilee' clip, is provided around the protrusions. With the refrigerator in place, and a port open to provide access, the releasable compression band may be tightened in the appropriate manner, for example by tightening drive screw 60. The port must then be closed, and a vacuum drawn inside the sock. The structure of the port may be as illustrated and described with reference to Figs. 2 and 3, but may be more conveniently located in a side wall of the sock for arrangements such as shown in Fig. 5.
The arrangement of the present invention can be used in any orientation or position on the magnet where practicable, provided that the construction of the refrigerator will permit such arrangement. The refrigerator is shown inverted in Figs. 2 and 3 to illustrate the potential to overcome a height restriction or reguirement for the heat exchanger to be positioned as high as possible.

Claims (14)

  1. CLAE4S: 1. A mounting assembly for cryogenic refrigerator (17) having a cooling stage (24) comprising a sock (15) accommodating the cooling stage and part of the refrigerator, characterised in that a mechanical fastener (38) is provided, mechanically clamping the cooling stage of the refrigerator into contact with a cooled component, the mechanical fastener being accessible from the exterior of the sock by a removable port (44) in the sock.
  2. 2. A mounting assembly according to claim 1 wherein the refrigerator is a two-stage refrigerator having first (30) and second (32) cooling stages, and the sock has a first (61) stage corresponding to first (30) stage of the refrigerator (17) , wherein, in use, the first cooling stage of the refrigerator is in thermal contact with the first stage of the sock and the second cooling stage of the refrigerator is clamped into contact with a cooled component by the mechanical fastener.
  3. 3. A mounting assembly according to claim 2 wherein the cryogenic refrigerator is mounted within the sock such that the second stage (24) of the refrigerator is above ohe first stage (22) of the refrigerator, and a closed end of the sock is above an open end.
  4. 4. A mounting assembly according to any preceding claim wherein the cooled equipment comprises a heat exchanger (30) located within the sock and connected as part of a thermosiphon arrangement.
  5. 5. A mounting arrangement according to claim 4 wherein thermosiphon tubes (32) are connected to the heat exchanger (30) through a wall of the sock (15)
  6. 6. A mounting arrangement according to claim 4 or claim 5 wherein inlet and outlet ports (34, 36) are provided, linking the thermosiphon tubes (32) to the heat exchanger (30) and each include a flexible element such that a location of the heat exchanger may be moved by a certain extent, independently of the location of the closed end of the sock.
  7. 7. A mounting arrangement according to any of claims 4-6 wherein the heat exchanger (30) defines a chamber (35) which is cooled by the cryogenic refrigerator (17)
  8. 8. A mounting arrangement according to claim 7, wherein the chamber (35) is linked to a cryogen vessel (12) enclosing a superconducting magnet (10)
  9. 9. An arrangement according to any preceding claim wherein locating means are provided to assist with locating the cooled equipment onto the cooling stage (24) of the refrigerator (17)
  10. 10. An arrangement according to any preceding claim wherein the port (44) comprises a plug (44) provided with 0-ring seals (46) which, in use, is subjected to a differential pressure which tends to hold it in place.
  11. 11. An arrangement according to claim 10 wherein a valve (48) is provided in the plug (44) whereby a vacuum may be drawn within the sock (15) or released.
  12. 12. A mounting assembly according to any of claims 1-3, wherein the cooled equipment comprises a thermal bus bar in mechanical contact with the cooling stage (24) of the refrigerator (17)
  13. 13. A mounting assembly according to any of claims 1-3, wherein the cooled equipment comprises a second stage (54) of the sock (15) , wherein one or more mechanical fasteners are provided, clamping the cooling stage of the refrigerator into contact with the second stage of the sock, thereby to ensure effective thermal contact between the second stage of the refrigerator and the second stage of the sock.
  14. 14. A mounting assembly according to claim 13, wherein second stage (54) of sock (15) comprises a thermally conductive block comprising protrusions (56) extending adjacent to the cooling stage (24) of the refrigerator; and wherein the mechanical fastener comprises a releasable compression band (58) provided around the protrusions, tightened to retain the protrusions in thermal and mechanical contact with the cooling stage of the refrigerator.
GB1307783.9A 2013-04-24 2013-04-30 Efficient thermal joint from the second stage of a coldhead to a condensing heat exchanger Active GB2513590B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB1307783.9A GB2513590B (en) 2013-04-30 2013-04-30 Efficient thermal joint from the second stage of a coldhead to a condensing heat exchanger
KR1020177031646A KR102095739B1 (en) 2013-04-24 2014-04-17 An assembly comprising a two-stage cryogenic refrigerator and associated mounting arrangement
CN201811208554.5A CN109612192A (en) 2013-04-24 2014-04-17 Component including two-stage low temperature refrigeration machine and associated mounting device
CN201811208931.5A CN109612193B (en) 2013-04-24 2014-04-17 Assembly comprising a two-stage cryocooler and an associated mounting device
KR1020157033276A KR101805075B1 (en) 2013-04-24 2014-04-17 An assembly comprising a two-stage cryogenic refrigerator and associated mounting arrangement
US14/787,148 US10181372B2 (en) 2013-04-24 2014-04-17 Assembly comprising a two-stage cryogenic refrigerator and associated mounting arrangement
CN201480023258.1A CN105229397B (en) 2013-04-24 2014-04-17 Component including two-stage low temperature refrigeration machine and associated mounting device
PCT/EP2014/057900 WO2014173809A1 (en) 2013-04-24 2014-04-17 An assembly comprising a two-stage cryogenic refrigerator and associated mounting arrangement
US16/183,851 US20190074116A1 (en) 2013-04-24 2018-11-08 Assembly comprising a two-stage cryogenic refrigerator and associated mounting arrangement
US16/183,928 US20190074117A1 (en) 2013-04-24 2018-11-08 Assembly comprising a two-stage cryogenic refrigerator and associated mounting arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1307783.9A GB2513590B (en) 2013-04-30 2013-04-30 Efficient thermal joint from the second stage of a coldhead to a condensing heat exchanger

Publications (3)

Publication Number Publication Date
GB201307783D0 GB201307783D0 (en) 2013-06-12
GB2513590A true GB2513590A (en) 2014-11-05
GB2513590B GB2513590B (en) 2015-05-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB1307783.9A Active GB2513590B (en) 2013-04-24 2013-04-30 Efficient thermal joint from the second stage of a coldhead to a condensing heat exchanger

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107289705B (en) * 2016-03-30 2024-02-09 苏州圣荣元电子科技有限公司 Low-temperature refrigerator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2409933A1 (en) * 1974-03-01 1975-09-11 Josef Dr Kemmer Cryostatic chamber for gamma ray detectors - has separably evacuable cooling and detector holding portions
JPS61248403A (en) * 1985-04-26 1986-11-05 Hitachi Ltd Cryostat
US20050166600A1 (en) * 2003-10-15 2005-08-04 Hitoshi Mitsubori Superconducting magnet apparatus and maintenance method of refrigerator for the same
GB2441778A (en) * 2006-09-15 2008-03-19 Siemens Magnet Technology Ltd Integrated access turret-refrigerator turret assembly for cryostat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2409933A1 (en) * 1974-03-01 1975-09-11 Josef Dr Kemmer Cryostatic chamber for gamma ray detectors - has separably evacuable cooling and detector holding portions
JPS61248403A (en) * 1985-04-26 1986-11-05 Hitachi Ltd Cryostat
US20050166600A1 (en) * 2003-10-15 2005-08-04 Hitoshi Mitsubori Superconducting magnet apparatus and maintenance method of refrigerator for the same
GB2441778A (en) * 2006-09-15 2008-03-19 Siemens Magnet Technology Ltd Integrated access turret-refrigerator turret assembly for cryostat

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GB2513590B (en) 2015-05-27
GB201307783D0 (en) 2013-06-12

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