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US 12,571,566 B2Granted
Cryocooler magnetic displacer spring
AssigneeTeledyne FLIR Commercial Systems, Inc.
InventorsTheodore Conrad, Martin Grabau
Life of this patent
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Abstract
A cryocooler is disclosed. The cryocooler may include a magnetic spring, a regenerator/displacer, a working fluid, and a cold finger configured to contain the working fluid in a closed system, and to contain the regenerator/displacer that is configured to travel linearly within the cold finger. The magnetic spring may provide a force to cause the regenerator/displacer to return to a center position during thermal cycle operation of the cryocooler. Additional systems and related methods are also provided.
Claims20
A cryocooler comprising:
- a magnetic spring;
- a regenerator/displacer;
- a working fluid;
- and
- a cold finger configured to contain the working fluid in a closed system, and to contain the regenerator/displacer that is configured to travel linearly within the cold finger;
- wherein the magnetic spring provides a force to cause the regenerator/displacer to return to a center position during a thermal cycle operation of the cryocooler;
- wherein the magnetic spring comprises a first magnetic part fixed relative to the regenerator/displacer and a second magnetic part fixed relative to the cold finger;
- wherein the first magnetic part is part of a plunger coupled to the regenerator/displacer, the plunger comprising a first non-magnetic section attached to the regenerator/displacer and positioned between the regenerator/displacer and the first magnetic part, the plunger also comprising a second non-magnetic section, the first magnetic part being between the first and second non-magnetic sections.
5 more elements
A cryocooler comprising:
- a magnetic spring;
- a regenerator/displacer;
- a working fluid;
- and
- a cold finger configured to contain the working fluid in a closed system, and to contain the regenerator/displacer that is configured to travel linearly within the cold finger;
- wherein the magnetic spring provides a force to cause the regenerator/displacer to return to a center position during a thermal cycle operation of the cryocooler;
- wherein the magnetic spring comprises a permanent magnet and a magnetic steel core.
4 more elements
A method comprising:
- containing, by a cold finger of a cryocooler, a working fluid of the cryocooler in a closed system;
- containing, by the cold finger, a regenerator/displacer of the cryocooler, wherein the regenerator/displacer is configured to travel linearly within the cold finger;
- and
- providing, by a magnetic spring of the cryocooler, a force to cause the regenerator/displacer to return to a center position during a thermal cycle operation of the cryocooler;
- wherein the magnetic spring comprises a permanent magnet and a magnetic steel core.
2 more elements
Dependencies are inferred from the claim text.