Two-zone fuzzy logic liquid level control
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United States of America Patent
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Nov 24, 2009
Grant Date -
Mar 23, 2006
app pub date -
Sep 21, 2005
filing date -
Sep 22, 2004
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Abstract
A level control algorithm for an HVAC refrigeration system is provided. The control algorithm utilizes a fuzzy logic methodology to automatically adjust a flow of refrigerant in the system to maintain a desired liquid level in the condenser. The fuzzy logic methodology incorporates a plurality of fuzzy logic control algorithms each having different membership functions and other control parameters that can provide different degrees of level control in the condenser. A particular fuzzy logic control algorithm is selected based on the amount a measured liquid level in the condenser deviates from the desired liquid level in the condenser.
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