Multi-stage cryogenic refrigerator

Details Multi-stage cryogenic refrigerator Multi-stage cryogenic refrigerator

1991-03-11

1992-05-19

Capossela, Ronald C.

Refrigeration

Gas compression, heat regeneration and expansion, e.g.,...

60520, F25B 900

Patent

active

051136635

ABSTRACT:
A multi-stage cryogenic refrigerator utilizing the Gifford-McMahon cycle has an external regenerator in each stage. The external regenerators are vertically stacked and connected in series, so that expanding gas is allowed to flow through the regenerators without significant obstruction or turning motion. The lower regenerators operate at progressively lower temperatures. The packing material within each regenerator has a higher specific heat than that of the regenerator immediately above as determined at the operating temperature of the regenerator.

REFERENCES:
patent: 2906101 (1959-09-01), McMahon et al.
patent: 3205668 (1965-04-01), Gifford
patent: 3312072 (1967-04-01), Gifford
patent: 3574998 (1971-04-01), Bredow et al.
patent: 4335579 (1982-06-01), Sugimoto
patent: 4490983 (1985-01-01), Gifford et al.
patent: 4848092 (1989-07-01), Gifford

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