Fast warm up pulse tube

Details Fast warm up pulse tube Fast warm up pulse tube

2007-03-20

2007-03-20

Doerrler, William C. (Department: 3744)

Refrigeration

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

Reexamination Certificate

active

10500982

ABSTRACT:
This invention provides an improved means of quickly warming a pulse tube (165) by shifting the phase relation of flow to the warm end of the pulse tube relative to flow to the warm end (117) of the pulse tube relative to flow to the warm end of the regenerator (160) using a “four valve” concept and the “active buffer” concept. Several different pulse tube configurations and valve timing relations that are effective at reversing the cycle from the normal mode, which produces cooling at the pulse tube heat station, to a reverse mode that produces heating are disclosed.

REFERENCES:
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patent: 6094921 (2000-08-01), Zhu et al.
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patent: 6301902 (2001-10-01), Zhu et al.
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patent: 6397605 (2002-06-01), Pundak
patent: 2001/0032469 (2001-10-01), Zhu et al.
patent: 2004/0040315 (2004-03-01), Koyama et al.

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