Fast cool down cryogenic refrigerator
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United States of America Patent
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May 28, 2013
Grant Date -
Apr 12, 2012
app pub date -
Oct 4, 2011
filing date -
Oct 8, 2010
priority date (Note) -
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Abstract
A refrigeration system for minimizing the cool down time of a mass to cryogenic temperatures including a compressor, an expander, a gas storage tank, interconnecting gas lines, and a control system. The compressor output is maintained near its maximum capability by maintaining near constant high and low pressures during cool down, gas being added or removed from the storage tank to maintain a near constant high pressure, and the speed of said expander being adjusted to maintain a near constant low pressure, no gas by-passing between high and low pressures.
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