Rinsable cold head for a cryo refrigerator using the pulse tube principle
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United States of America Patent
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Issued Date -
May 22, 2008
app pub date -
Nov 13, 2007
filing date -
Nov 17, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A cold head (20; 30) for a cryo refrigerator comprises at least one refrigerator tube (5), at least one pulse tube (6, 9), and one feed line (4) for feeding a working gas from a turning valve (3) of the cryo refrigerator to a warm end of the regenerator tube (5), wherein a cold end of the pulse tube (6, 9) is connected to a cold end of the regenerator tube (5) via a connecting line (7, 8), and wherein a buffer line (10, 11) extending to a buffer volume (14, 15) of the cryo refrigerator is provided at a warm end of the pulse tube (6, 9), is characterized in that a first reversing valve (21) is provided in the feed line (4), and a second reversing valve (23; 31, 32) is provided in the buffer line (10, 11), such that, in a rinsing state of the reversing valves (21, 23; 31, 32), the turning valve (3) and the buffer volume (14, 15) are separated from the regenerator tube (5) and from the pulse tube (6, 9), and the regenerator tube (5) and the pulse tube (6, 9) can be rinsed via the reversing valves (21, 23; 31, 32). The inventive cold head can be cleaned in the cold, installed state in the cryostat.
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