Cryocooler system with welded cold tip

Details Cryocooler system with welded cold tip Cryocooler system with welded cold tip

1994-08-03

1997-08-05

Kilner, Christopher

Refrigeration

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

62 511, 62295, F25B 900, F25B 1900

Patent

active

056531125

ABSTRACT:
A cryocooler system (20) includes a heat sink (24), such as a Stirling cycle heat engine having a cold cylinder sleeve (26) and a cold gas pocket region (32) within the cold cylinder sleeve (26). An adapter (36) is sealed to the cold cylinder sleeve (26) with a hermetic seal, such as a welded joint (38). A copper cold tip (28) has a first end (34) directly contacting the cold gas pocket region (32) within the cold cylinder sleeve (26). The periphery of the cold tip (28) is welded, preferably by frictional welding, to the adapter (36). The cold tip (28) thereby provides a hermetic seal to the end of the cold cylinder sleeve (26) to retain the working gas within the cold gas pocket region (32) and also to provide an unimpeded heat flow path to the cold gas pocket region (32).

REFERENCES:
patent: 3609992 (1971-10-01), Cacheux
patent: 4079595 (1978-03-01), Kroebig
patent: 4414824 (1983-11-01), Durenec
patent: 4501131 (1985-02-01), Gaskin et al.
patent: 4663944 (1987-05-01), Bernius et al.
patent: 4918312 (1990-04-01), Wellman et al.
patent: 5111050 (1992-05-01), Maassen et al.

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