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公开(公告)号：US20240271836A1
公开(公告)日：2024-08-15
申请号：US18648576
申请日：2024-04-29
CPC分类号： F25B9/145 , F02G1/043 , F25B2309/1402 , F25B2309/1405 , F25B2309/1409
摘要： A thermoacoustic device includes a process volume which is filled with a working fluid through which the acoustic wave propagates. The thermoacoustic device further includes an acoustic network comprising a tubular loop configured with a passage providing an opening in the loop and configured as acoustic circuit provided with a compliance volume, a thermo-acoustic core and an inertance volume. Within the loop, the thermoacoustic core is at a first side thereof adjacent to the passage at a first path length through the loop, and at its second side, opposite to the first side, the thermoacoustic core is at a second path length from the passage. The thermoacoustic device includes within the loop a spring-type partitioning element that is configured to close off the cross-section of the tube and to be impermeable for the working fluid while allowing transmission of pressure waves in the working fluid through the spring-type partitioning element.
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公开(公告)号：US11946680B2
公开(公告)日：2024-04-02
申请号：US17860909
申请日：2022-07-08
发明人： Corban I. Tillemann-Dick , Kyle J. Thompson , Bryan J. Choo , Johanna Zultak , Tyler James Plant
CPC分类号： F25B9/12 , F25B9/10 , F25B9/145 , F25B25/005 , F25D19/006 , H05K7/208 , B33Y80/00 , F25B2500/13 , H05K7/20827
摘要： A dilution refrigerator is provided. The dilution refrigerator includes a plurality of thermalization plates configured to be cooled to a plurality of temperatures, and a first thermalization plate of the plurality of thermalization plates includes an integrated heat exchanger. The integrated heat exchanger includes channels formed in the first thermalization plate, and the channels are configured to allow helium to flow through the first thermalization plate during operation of the dilution refrigerator to improve heat exchange and cooling power of the dilution refrigerator.
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公开(公告)号：US11854858B2
公开(公告)日：2023-12-26
申请号：US17325334
申请日：2021-05-20
申请人： CRYO TECH LTD.
发明人： Alexander Veprik
IPC分类号： F25B9/14 , H01L21/683 , B23B31/30
CPC分类号： H01L21/6838 , B23B31/307 , F25B9/145 , F25B9/14 , F25B2309/003
摘要： An expander unit of a cryogenic refrigerator device includes a moving assembly with a porous regenerative heat exchanger configured to move back and forth along a longitudinal axis. A magnetic spring assembly includes a stationary magnetic assembly fixed to the cold finger base that includes one or more magnetic rings fixedly arranged about a bore. A movable magnetic assembly includes one or more movable magnetic rings fixed to the moving assembly. An outer lateral dimension of each of the movable magnetic rings is less than an inner lateral dimension of the bore. The stationary magnetic assembly and the movable magnetic assembly are configured such that, when the moving assembly is displaced along the longitudinal axis from an equilibrium position, attractive and repulsive forces between the movable magnetic assembly and the stationary magnetic assembly yield a restoring force that is directed to restore the moving assembly to the equilibrium position.
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公开(公告)号：US20230384016A1
公开(公告)日：2023-11-30
申请号：US18227173
申请日：2023-07-27
发明人： John Corey , Keith Gustafson , Buzz Bies
CPC分类号： F25D11/04 , F25D19/006 , F25D17/06 , F25D19/02 , F25D3/105 , F25D29/008 , F25B9/14 , F25D23/003 , F25B9/145 , F25D2201/14 , F25D2700/121 , F25D2600/04 , F25D2700/12
摘要： A cryogenic freezer features a dewar defining a storage space. A reservoir is positioned within or adjacent to the storage space and is configured to contain a cryogenic liquid with a headspace above the cryogenic liquid in a reservoir interior space that is sealed with respect to the storage space. A refrigeration module is in heat exchange relationship with the reservoir. A sensor is configured to determine a temperature or pressure within the reservoir. A system controller is connected to the sensor and the refrigeration module and configured so that the refrigeration module is adjusted to provide additional cooling to the reservoir when a pressure or temperature within the headspace increases.
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公开(公告)号：US11788783B2
公开(公告)日：2023-10-17
申请号：US16182878
申请日：2018-11-07
发明人： John Corey , Keith Gustafson , Buzz Bies
CPC分类号： F25D11/04 , F25B9/14 , F25B9/145 , F25D3/105 , F25D17/06 , F25D19/006 , F25D19/02 , F25D23/003 , F25D29/008 , F25D2201/14 , F25D2600/04 , F25D2700/12 , F25D2700/121
摘要： A cryogenic freezer features a dewar defining a storage space. A reservoir is positioned within or adjacent to the storage space and is configured to contain a cryogenic liquid with a headspace above the cryogenic liquid in a reservoir interior space that is sealed with respect to the storage space. A refrigeration module is in heat exchange relationship with the reservoir. A sensor is configured to determine a temperature or pressure within the reservoir. A system controller is connected to the sensor and the refrigeration module and configured so that the refrigeration module is adjusted to provide additional cooling to the reservoir when a pressure or temperature within the headspace increases.
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公开(公告)号：US20230271105A1
公开(公告)日：2023-08-31
申请号：US18136733
申请日：2023-04-19
申请人： 1372934 B.C. Ltd.
CPC分类号： B01D8/00 , F25B9/10 , F25B9/12 , F25B9/145 , F25D19/006
摘要： Systems and methods for improving the performance of dilution refrigeration systems are described. Filters and traps employed in the helium circuit of a dilution refrigerator may be modified to improve performance. Some traps may be designed to harness cryocondensation as opposed to cryoadsorption. A cryocondensation trap employs a cryocondensation surface having a high thermal conductivity and a high specific heat with a binding energy that preferably matches at least one contaminant but does not match helium. Multiple traps may be coupled in series in the helium circuit, with each trap designed to trap a specific contaminant or set of contaminants. Both cryocondensation and cryoadsorption may be exploited among multiple traps.
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公开(公告)号：US20230228472A1
公开(公告)日：2023-07-20
申请号：US18123347
申请日：2023-03-20
发明人： Takaaki MORIE
CPC分类号： F25B49/02 , F25B9/145 , F25B2309/1427 , F25B2700/15
摘要： The cryocooler includes an expander motor that operates an expander of the cryocooler, an inverter that is configured to control an operation frequency of the expander motor and is operable to drive the expander motor in the steady operation at an operation frequency lower than in the cool-down operation, a current sensor that measures a current supplied from the inverter to the expander motor, and outputs a motor current signal indicating the current; and a processor that monitors the expander motor on a basis of the motor current signal in at least the steady operation.
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公开(公告)号：US20230151759A1
公开(公告)日：2023-05-18
申请号：US17987528
申请日：2022-11-15
申请人： Earth Observant Inc.
CPC分类号： F01P1/06 , B64G1/405 , F03H1/0037 , F25B9/145
摘要： A satellite having a cooling system to remove heat from an electric rocket engine using a working fluid. The cooling system can include a pump that circulates working fluid along a cooling loop between the rocket engine and a radiator. The cooling system can also utilize thermoacoustic, Stirling refrigeration, and/or heat pipe techniques. One or more reservoirs can be provided to store the working fluid, and in some forms a secondary reservoir can be provided to aid in management of a center of mass of the satellite. A fluid reaction loop can be provided in which working fluid is accelerated to impart a torque on the satellite. In some forms, the working fluid can be utilized as both a coolant and a propellant for the rocket engine. The electric rocket thruster can also include one or more internal pathways for the conveyance of working fluid.
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公开(公告)号：US20190011170A1
公开(公告)日：2019-01-10
申请号：US16028435
申请日：2018-07-06
发明人： Takaaki MORIE
IPC分类号： F25D19/00 , F25B9/10 , F25B9/14 , G01R33/38 , G01R33/421 , G01R33/3815
CPC分类号： F25D19/006 , F25B9/002 , F25B9/10 , F25B9/145 , F25B2309/001 , F25B2309/1406 , F25B2309/1428 , F25B2500/11 , F25B2500/12 , G01R33/3804 , G01R33/3806 , G01R33/3815 , G01R33/421 , H01F6/04
摘要： A cryocooler includes: a magnetic shield axially extending along a second-stage cylinder from a second-stage cooling stage outside the second-stage cylinder and disposed separated from a first-stage cooling stage by an axial separation distance, wherein an annular space open to a helium atmosphere is formed between the second-stage cylinder and the magnetic shield, and the axial depth of the annular space is longer than the axial separation distance; and a convection suppression member, for suppressing axial convection of helium gas in the annular space caused by temperature difference between the second-stage cylinder and the magnetic shield, is disposed in the annular space and is of longer axial length than the axial separation distance.
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公开(公告)号：US10040982B2
公开(公告)日：2018-08-07
申请号：US15369546
申请日：2016-12-05
发明人： Katsuhiko Yamada , Keiichi Fuse
IPC分类号： G01R33/035 , C09K5/08 , F25B9/14 , B22F9/10 , C09K5/14 , B22F9/08 , H01F1/01 , G01R33/38 , G01R33/3815
CPC分类号： C09K5/08 , B22F9/08 , B22F9/10 , B23P15/26 , C09K5/041 , C09K5/14 , C22C2202/02 , F25B9/14 , F25B9/145 , F25B2309/003 , F25B2309/1415 , G01R33/3804 , G01R33/3815 , H01F1/015 , Y10T428/12014
摘要： Provided is a group of rare-earth regenerator material particles having an average particle size of 0.01 to 3 mm, wherein the proportion of particles having a ratio of a long diameter to a short diameter of 2 or less is 90% or more by number, and the proportion of particles having a depressed portion having a length of 1/10 to ½ of a circumferential length on a particle surface is 30% or more by number. By forming the depressed portion on the surface of the regenerator material particles, it is possible to increase permeability of an operating medium gas and a contact surface area with the operating medium gas.
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