DRY ICE-BASED COOLING METHOD AND APPARATUS
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United States of America
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Issued Date -
Jan 20, 2022
app pub date -
Jun 17, 2019
filing date -
Jun 17, 2019
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Abstract
The present invention, which falls within the field of refrigeration methods, is configured in a controlled system that uses the liquid fraction of dry ice as a heat exchanger. The method uses dry ice and pressures above 5.1atm so that the three phases coexist: solid, liquid and gaseous carbon dioxide. Through a connection in the container (1) the liquid fraction can be directed to another container (3) where the heat exchange occurs with the substance to be refrigerated, which causes the liquid CO2 to return to the gaseous state, which in turn can be directed to the container (5) for gas reuse. The system can have pressure switches, thermocouples, relays, pumps, valves and solenoids to control the conditions in each container and guarantee the integrity of the system.
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