Cryogenic refrigerating system
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United States of America Patent
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-
Sep 23, 2003
Grant Date -
Nov 7, 2002
app pub date -
May 2, 2002
filing date -
Oct 5, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a cryogenic refrigerating system for achieving ultra low temperature by sequentially obtaining low temperature through repetition of expansion and evaporation of a mixed-refrigerant in multiple stages. The refrigerating system includes a heat exchanger and a compressor between a final evaporator and a compressor. The heat exchanger causes evaporated refrigerant vapor in a suction tube for the compressor to be heated and to be drawn into the compressor, and causes the refrigerant condensed by a condenser to be supercooled. The refrigerating system includes a plurality of expansion/suction apparatuses connected with one another between the gas/liquid separator and the final evaporator.
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