EP4025845A1 - Machine cryogénique régénérative - Google Patents
Machine cryogénique régénérativeInfo
- Publication number
- EP4025845A1 EP4025845A1 EP20764432.9A EP20764432A EP4025845A1 EP 4025845 A1 EP4025845 A1 EP 4025845A1 EP 20764432 A EP20764432 A EP 20764432A EP 4025845 A1 EP4025845 A1 EP 4025845A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- cold finger
- machine according
- machine
- working fluid
- 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
Links
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 62
- 238000009826 distribution Methods 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 20
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000010363 phase shift Effects 0.000 claims description 8
- 230000010349 pulsation Effects 0.000 claims description 8
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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
- 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
-
- 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
- F25B9/145—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 pulse-tube cycle
-
- 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
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1407—Pulse-tube cycles with pulse tube having in-line geometrical arrangements
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1418—Pulse-tube cycles with valves in gas supply and return lines
- F25B2309/14181—Pulse-tube cycles with valves in gas supply and return lines the valves being of the rotary type
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1419—Pulse-tube cycles with pulse tube having a basic pulse tube refrigerator [PTR], i.e. comprising a tube with basic schematic
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1423—Pulse tubes with basic schematic including an inertance tube
-
- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1424—Pulse tubes with basic schematic including an orifice and a reservoir
Definitions
- the invention relates to a cryogenic machine of the regenerative type (eg pulsed gas tube, Stirling, Gifford-McMahon, etc.)
- a cryogenic machine of the regenerative type eg pulsed gas tube, Stirling, Gifford-McMahon, etc.
- cryogenic machines There are different types of cryogenic machines. These cryogenic machines are classified into two types: recuperative coolers and regenerative coolers.
- Recuperative coolers are based on a continuous flow of the working fluid, usually a gas, which is compressed and expanded, with the expansion taking place continuously in an orifice for the Joule-Thomson cycle. or in a turbine for the Brayton cycle.
- the term "recuperative” comes from the fact that an exchanger, generally counter-current, is used to recover the enthalpy of the cold gas from the expansion to pre-cool the hot gas from the compressor.
- the flow of the working fluid is alternating.
- the gas compression and expansion take place cyclically at a frequency of a few Hertz for so-called “low frequency” coolers and at several tens of Hertz for so-called “high frequency” coolers.
- recuperative coolers As with recuperative coolers, the enthalpy of the cold gas from the expansion must be recovered. However, it is not possible to use an exchanger in the case of cyclic operation. A regenerator is then used to perform this function. The regenerator transfers the enthalpy of the cold gas to the hot gas between two cycles. The regenerator also implements thermal storage to ensure this heat transfer at two different times.
- Figures 1 and 2 are block diagrams of a pulsed gas tube type regenerative cryogenic machine operating at high frequency (i.e. above 20Hz).
- Figure 3 is a block diagram of a Stirling-type regenerative cryogenic machine operating at high frequency.
- FIGs of Figures 1 to 3 represent the general topology of these coolers, that is to say in a so-called “in-line” schematic configuration of the cold fingers.
- the topology of these cold fingers can also be "U” or coaxial, while keeping the same operating principle and the same components.
- the machine comprises an oscillator T and a cold finger 20 in fluid connection with the oscillator.
- the machine contains a working fluid, usually helium.
- the oscillator T is in the form of a piston driven by a reciprocating movement schematically represented by the bidirectional arrow, thus generating a pressure wave in the working fluid.
- a pressure oscillator because the back and forth movement comes from the piston makes it possible to generate a pressure oscillation and not a pressure difference as in recuperative machines.
- the cold finger 20 (which can in particular be of the pulsed gas tube type, Stirling or Gifford-McMahon) allows the production of the refrigeration effect.
- the cold finger comprises a first heat exchanger 2, a regenerator 3, a second heat exchanger 4, a pulsation tube 5, a third exchanger heat 6, and a phase shift system 7, 8 or 9.
- the working fluid When the piston moves to the right of figure 1 or 2, the working fluid is compressed and passes through the first heat exchanger 2 and the regenerator 3.
- the regenerator having a high specific heat and being thermally insulated from the heat exchanger. outside the machine, the temperature of the working fluid goes from a first temperature T1, which is generally the ambient temperature to which the machine is exposed, to a second temperature T2 lower than T1.
- the second temperature is a cryogenic temperature, i.e. typically less than 120K.
- the working fluid transfers energy to regenerator 3, which stores it due to its high specific heat.
- the working fluid enters the pulsation tube 5 through the second heat exchanger 4.
- the working fluid undergoes compression and adiabatic expansion successive to the operating frequency of oscillator 1 '.
- the compression work is discharged at the end of the pulsation tube 5, in a third heat exchanger 6 operating at room temperature while at the other end of the pulsation tube 5, the expansion allows the temperature of the gas to be lowered. in the second exchanger 4, reaching a cryogenic temperature.
- phase shift system This thermal decoupling effect on either side of the cold finger is provided by a 7, 8 phase shift system or "phase shifter” in English.
- This system ensures the necessary phase shift between the pressure wave and the flow rate in the cold finger so that the expansion takes place at the level of the cold exchanger 4.
- the phase shift system generally consists of an inertance 7 and a buffer tank 8.
- the inertance has a small passage section compared to that of the pulsation tube 5, and the buffer tank 8 has a high volume compared to that of the tube and of the inertance; therefore, the pressure within the buffer tank 8 is substantially constant.
- this phase shift system is in the form of a pressure regulator 9, similar to the pressure oscillator 1 ’but of different volume and power.
- the working fluid passes through regenerator 3 in the opposite direction and this time it is the regenerator which transfers the energy stored during compression to the working fluid cooled during cooling. relaxation.
- the general configuration is similar to that of the pulsed gas tube, with the difference that the cold finger 20 uses an expansion valve. mechanical 9 to ensure the relaxation of the working fluid.
- the pulsation tube 5, the exchanger 6 and the phase shift system 7, 8 are omitted in the case of a cold Stirling finger.
- the pressure oscillator is a critical element for aspects: cost, performance, size, mass, reliability ...
- An object of the invention is to remedy the aforementioned drawbacks and in particular to design a cryogenic machine in which the generation of the pressure oscillation is carried out by a less expensive means, more reliable and generating less vibrations than the existing oscillators. Furthermore, said machine must be able to be used in a high or low power cooler.
- the invention provides a cryogenic machine of regenerative type, comprising a pressure oscillator,
- the pressure oscillator comprises a centrifugal compressor and a fluid distribution member configured to alternately distribute the working fluid at high pressure and low pressure centrifugal compressor in said cold finger.
- the centrifugal compressor does not generate vibrations, which is particularly advantageous in the space field and in all the applications where vibrations could disturb the operation of devices.
- the transmission of the pressure wave does not depend on the volume between the compressor and the cold finger, the compressor can be offset from the cold finger, which allows greater freedom in the design of the machine and in particular greater compactness, which is particularly sought after for on-board applications.
- the compression ratio of the centrifugal compressor is between 1, 1 and 1, 5;
- the operating frequency of the pressure oscillator is greater than 10Hz
- the centrifugal compressor is arranged between a so-called low-pressure buffer tank and a so-called high pressure buffer tank, the fluid distribution member being configured to selectively connect the cold finger to one of the low-pressure buffer tanks and high pressure :
- the fluid distribution member comprises a rotary valve or a linear distribution valve
- the machine comprises a cold finger of the pulsed gas tube type including a pulsation tube, an exchanger and a phase shift system;
- the machine includes a cold finger of the Stirling type including a pressure reducing piston;
- the fluid distribution member is configured to be actuated fluidly by the working fluid or mechanically by an external actuator
- the fluid distribution member is configured to be actuated by the control rod of the pressure reducing piston of the cold finger;
- the machine contains helium as the working fluid
- the machine comprises several cold fingers, each cold finger being fluidly connected to one or more centrifugal compressors;
- the machine further comprises a circuit for circulating working fluid from the high pressure buffer tank to the low pressure buffer tank, so as to cool a part offset with respect to the cold finger and mechanically decoupled from said cold finger.
- Another object of the invention relates to a spacecraft comprising a cryogenic machine as described above.
- FIG. 1 is a block diagram of a cryogenic machine of the pulsed air tube type according to the state of the art
- FIG. 2 is a block diagram of another cryogenic machine of the forced air tube type according to the state of the art
- FIG. 3 is a block diagram of a cryogenic machine of the Stirling type according to the state of the art
- FIG. 4 is a block diagram of a cryogenic machine of the pulsed gas tube type according to one embodiment of the invention.
- FIG. 5 is a block diagram of a cryogenic machine of the Stirling type according to one embodiment of the invention.
- Figure 6 is a block diagram of a Stirling type cryogenic machine according to another embodiment of the invention.
- FIG. 7 is a block diagram of a pulsed gas tube type cryogenic machine incorporating a thermal switch function according to one embodiment of the invention.
- FIG. 4 is a block diagram of a forced air tube type cryogenic machine according to one embodiment of the invention.
- the reference signs identical to those in FIG. 1 designate elements which are identical or perform the same function. These elements will therefore not be described again in detail.
- the cold finger 20 is similar to that of existing machines, for example to that of FIG. 1 or to that of FIG. 2.
- Oscillator 1 comprises a centrifugal compressor fluidly coupled on the one hand to a so-called low pressure buffer tank 10 and a so-called high pressure buffer tank 11.
- low pressure and high pressure are relative terms, low pressure being lower than high pressure.
- the oscillator further comprises a fluid circuit connecting the cold finger to each of the buffer volumes 10, 11.
- the oscillator finally comprises a fluidic distribution member 12 arranged in the fluidic circuit, making it possible to selectively and alternately put the cold finger in fluid connection with the buffer tank 10 or the buffer tank 11.
- This distribution member 12 can advantageously be a rotary valve or a linear actuator, but any other type of actuator could be used as long as it is allows the high pressure and low pressure gas to be distributed alternately in the cold finger.
- each buffer tank could be provided with a respective valve, said valves being configured to open or close according to the phase of the operating cycle of the machine.
- buffer tank is meant that the volume of the reservoirs 10 and 11 is sufficiently large compared to the volume of the fluid circuit which connects the reservoirs and the cold finger so that the pressure generated by the centrifugal compressor in said reservoirs 10, 11 remains substantially constant .
- These reservoirs can optionally be removed if the volume of the fluidic circuit allows this function to be performed or if the performance of the cold finger is not impacted by this pressure fluctuation.
- a compression ratio between 1, 1 and 1, 5 will be sought to replace the pressure oscillator with a centrifugal compressor and a fluid distribution member.
- This compression ratio is completely compatible with the compression ratio generated by a centrifugal compressor. We can therefore directly replace the pressure oscillator by a centrifugal compressor coupled to a fluid distribution member.
- the operating frequency of the pressure oscillator is advantageously greater than or equal to 10Hz.
- the operation of the proposed cryogenic machine is as follows.
- the cold finger 20 is in fluid connection with the high pressure buffer tank 11 via the valve 12.
- the working fluid passes through the first exchanger 2, the regenerator 3 and the second. exchanger 4 to tube 5.
- the working fluid passes from ambient temperature T1 to cryogenic temperature T2; the heat of the working fluid transferred to the regenerator 3 is accumulated therein.
- valve 12 is actuated so as to interrupt the fluidic connection between the cold finger and the high pressure buffer tank 11 and to establish a fluidic connection between the cold finger and the low pressure tank 10.
- the working fluid undergoes an adiabatic expansion in the tube 5.
- a part of the fluid is sucked from the buffer tank 8 towards the tube 5 through the inertance 7.
- the working fluid passes through the second heat exchanger 4 and the regenerator 3, which returns the heat stored to it via the first heat exchanger 2.
- the centrifugal compressor makes it possible to decouple the compression zone from the cold finger. Indeed, the pressure wave can be transmitted over a sufficiently long distance and does not depend on the volume of fluid between the compressor and the cold finger.
- the oscillator is not necessarily aligned with the cold finger as shown in Figure 4, but can be arranged at another location on the machine, depending on the size constraints encountered.
- centrifugal compressor 1 and the fluid distribution member are similar to those already described with reference to Figure 4.
- regenerator 3 and the regulator 9, which form the cold finger 20 of the machine are similar to those of FIG. 3.
- the centrifugal compressor makes it possible to decouple the compression zone from the cold finger. Indeed, the pressure wave can be transmitted over a sufficiently long distance and does not depend on the volume of fluid between the compressor and the cold finger.
- the compressor is not necessarily aligned with the cold finger as shown in Figure 3, but can be arranged at another location on the machine, depending on the size constraints encountered.
- the cold finger is of the coaxial type, the expansion piston 9 being arranged in the regenerator. 3.
- the fluid distribution member can be actuated fluidly by the working fluid or mechanically by an external actuator.
- the oscillator (s) can be deported from the cold finger (s).
- the oscillator according to the invention therefore makes it possible to form a wide variety of regenerative cryogenic machines, with great freedom of choice in the arrangement of the various components.
- This thermal bonding function is achieved by using the pressure difference between the buffer tanks 10 and 11 to ensure a flow of working fluid from the high pressure buffer tank to the low pressure buffer tank.
- the working fluid is cooled to a cold temperature close to T2 by a counter-current exchanger 40, then to temperature T2 on an exchanger integrated into the cold exchanger 4.
- the cold working liquid is then deported at a distance. ranging from a few centimeters to several meters to cool the part to be cooled via the exchanger 50.
- the working fluid heats up in the exchanger 50 and then returns to the counter-current exchanger 40 to be re-injected in the buffer tank 10 at low pressure.
- the secondary fluidic circuit 51 and 52 constituting the thermal link can be produced with tubes of small dimensions making it possible to limit the mass of the system, to lower the stiffness of the tubes (to ensure mechanical decoupling between the components) or to limit losses by conductions along these tubes.
- This thermal link is therefore passive in the sense that, when the cooler is operating, the circulation of working fluid is effective and the thermal coupling also. Conversely, if the cryogenic cooler is stopped, there is no thermal coupling.
- thermal switch having a thermal coupling / decoupling function.
- This function is particularly useful for systems incorporating several cold fingers (in the case of a spacecraft, in particular incorporating a nominal cooler and a redundant one). The cold fingers that are not working are then thermally decoupled from the part to be cooled and thus do not lead to thermal losses.
- cold finger 20 shown in FIG. 7 is of the pulsed gas tube type, it goes without saying that any other type of cold finger could be used in connection with this thermal switch.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1909710A FR3100319B1 (fr) | 2019-09-04 | 2019-09-04 | Machine cryogénique régénérative |
PCT/EP2020/074869 WO2021044034A1 (fr) | 2019-09-04 | 2020-09-04 | Machine cryogénique régénérative |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4025845A1 true EP4025845A1 (fr) | 2022-07-13 |
EP4025845B1 EP4025845B1 (fr) | 2023-07-26 |
EP4025845C0 EP4025845C0 (fr) | 2023-07-26 |
Family
ID=69157992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20764432.9A Active EP4025845B1 (fr) | 2019-09-04 | 2020-09-04 | Machine cryogénique régénérative |
Country Status (4)
Country | Link |
---|---|
US (1) | US20220325922A1 (fr) |
EP (1) | EP4025845B1 (fr) |
FR (1) | FR3100319B1 (fr) |
WO (1) | WO2021044034A1 (fr) |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6378312B1 (en) * | 2000-05-25 | 2002-04-30 | Cryomech Inc. | Pulse-tube cryorefrigeration apparatus using an integrated buffer volume |
US7434408B2 (en) * | 2003-07-31 | 2008-10-14 | High Energy Accelerator Research Organization | Method for cooling an article using a cryocooler and cryocooler |
US7249465B2 (en) * | 2004-03-29 | 2007-07-31 | Praxair Technology, Inc. | Method for operating a cryocooler using temperature trending monitoring |
CN102939506B (zh) * | 2010-06-14 | 2015-05-20 | 住友重机械工业株式会社 | 超低温制冷机及冷却方法 |
DE102012213293B4 (de) * | 2012-07-27 | 2018-03-29 | Pressure Wave Systems Gmbh | Kompressorvorrichtung sowie eine damit ausgerüstete Kühlvorrichtung und eine damit ausgerüstete Kältemaschine |
FR3047551B1 (fr) * | 2016-02-08 | 2018-01-26 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Dispositif de refrigeration cryogenique |
EP3285032B1 (fr) * | 2016-08-18 | 2019-07-24 | Bruker BioSpin AG | Agencement de cryostat et son procédé de fonctionnement |
JP7075816B2 (ja) * | 2018-05-23 | 2022-05-26 | 住友重機械工業株式会社 | 極低温冷凍機のロータリーバルブおよび極低温冷凍機 |
-
2019
- 2019-09-04 FR FR1909710A patent/FR3100319B1/fr active Active
-
2020
- 2020-09-04 US US17/639,989 patent/US20220325922A1/en active Pending
- 2020-09-04 WO PCT/EP2020/074869 patent/WO2021044034A1/fr unknown
- 2020-09-04 EP EP20764432.9A patent/EP4025845B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
WO2021044034A1 (fr) | 2021-03-11 |
US20220325922A1 (en) | 2022-10-13 |
FR3100319A1 (fr) | 2021-03-05 |
FR3100319B1 (fr) | 2021-08-20 |
EP4025845B1 (fr) | 2023-07-26 |
EP4025845C0 (fr) | 2023-07-26 |
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