Cooling method for controlled high speed chilling or freezing
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United States of America Patent
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Apr 25, 2006
Grant Date -
Mar 11, 2004
app pub date -
May 16, 2001
filing date -
May 18, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cooling method for controlled high speed chilling or freezing is disclosed. Cooling fluid is circulated by a submersed circulator, such as a motor, at a substantially constant velocity past a substance to be cooled . The velocity of fluid flow is maintained despite changes in the viscosity of the cooling fluid, by either increasing or decreasing the amount of torque supplied by the motor. The cooling fluid is cooled to a desired temperature by circulating the fluid past a multi-path heat exchanging coil connected to a refrigeration system. An optimal cooling fluid temperature for a variety of applications is in the range of about -24° C. to -26° C., resulting in significant efficiency gains over conventional cooling processes.
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