System and method of hot gas defrost control for multistage cascade refrigeration system
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United States of America
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Feb 18, 2025
Grant Date -
Feb 2, 2023
app pub date -
Sep 11, 2020
filing date -
Sep 11, 2020
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Abstract
The present invention provides a system and method for an improved multistage, cascade refrigeration system using hot gas defrost to rid the evaporator of ice build-up which accumulates over time, while the air in the evaporator enclosure remains below the freezing point of water. The present invention thus provides greater defrost flexibility with increased ease of design and implementation than current refrigeration systems, which allows for more robust hot gas defrost function for multistage refrigeration systems, such that it is unaffected by temperature changes of the condensing fluid (ambient air temperature for air cooled condensers, water temperature for water cooled condensers), and can be readily adapted to any refrigerant suitable for a selected temperature range.
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