Title:
CRYOGENIC REFRIGERATOR
Document Type and Number:
WIPO Patent Application WO2005019746
Kind Code:
A3
Abstract:
The invention relates to a cryogenic refrigerator comprising at least two refrigeration stages (KS1, KS2), each of which contains an expansion pipe (10, 20) and a regenerator (12, 22). The first refrigeration stage (KS1) generates a preliminary cooling and the second refrigeration stage (KS2) a secondary cooling. The compressed gas that is delivered by a compressor (27) is fed to the refrigeration stages by means of a valve device (30.) Separate conduits (31, 32) lead from said device to the refrigeration stages. The valve device is configured in such a way that it defines different times for the inflow and/or outflow of process gas. This permits a decoupling of both refrigeration stages.
Inventors:
KOOPMANN THEO (DE)
Application Number:
PCT/EP2004/007765
Publication Date:
June 09, 2005
Filing Date:
July 14, 2004
Export Citation:
Assignee:
LEYBOLD VAKUUM GMBH (DE)
KOOPMANN THEO (DE)
KOOPMANN THEO (DE)
International Classes:
F25B9/14; (IPC1-7): F25B9/14
Foreign References:
| US6308520B1 | 2001-10-30 | |||
| US5711156A | 1998-01-27 |
Other References:
TANIDA K ET AL TIMMERHAUS K D (ED ): "THREE-STAGED PULSE TUBE REFRIGERATOR CONTROLLED BY FOUR-VALVE METHOD", 17 July 1995, ADVANCES IN CRYOGENIC ENGINEERING. PROCEEDINGS OF THE 1995 CRYOGENIC ENGINEERING CONFERENCE, COLUMBUS JULY 17 - 21, 1995, NEW YORK, PLENUM, US, PAGE(S) 1503-1509, ISBN: 0-306-45300-2, XP000637596
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