Cooling device with controllable evaporation temperature
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United States of America Patent
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Issued Date -
Sep 27, 2012
app pub date -
Mar 7, 2012
filing date -
Mar 25, 2011
priority date (Note) -
Abandoned
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Abstract
A cooling device for cooling a test sample has at least two cascade cooling stages, each with at least one coolant line, one compressor (1.1, 2.1), one relief throttle (1.4, 2.4), one evaporator (6, 7) and one liquefier (3, 6). The cooling device has an additional relief throttle disposed between the evaporator (7) of the last cascade cooling stage and the compressor (2.1) of the last cascade cooling stage. This represents a simple possibility of adjusting the cooling temperature, thereby avoiding the use of valves that can be adjusted at low temperatures, since these are complex and expensive.
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