Apparatus and method for subcooling control based on superheat setpoint control
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United States of America Patent
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Jan 8, 2019
Grant Date -
Jan 29, 2015
app pub date -
Oct 15, 2014
filing date -
Nov 21, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A system including a setpoint module, a summer, a control module, and an expansion valve module. The setpoint module is configured to indirectly control sub-cooling of a condenser by adjusting a superheat setpoint based on (i) a return air temperature setpoint or a supply air temperature setpoint, and (ii) an outdoor ambient temperature. The summer is configured to determine an error between the superheat setpoint and a superheat level of a compressor. The control module is configured to generate a control signal based on the error. The expansion valve module is configured to electronically control a state of an expansion valve based on the control signal.
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