Control system for heat pump having decoupled sensor arrangement
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United States of America Patent
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-
May 17, 1994
Grant Date -
N/A
app pub date -
Aug 12, 1992
filing date -
Aug 12, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Refrigerant is metered through the expansion valve based on compressor discharge temperature and ambient air temperature measurements. The microprocessor-based control system selects the appropriate stepper motor valve setting to achieve optimal performance. The temperature measurements used in the control system are decoupled from fluctuations due to shifting of the refrigerant dry out point. This allows the system to be operated at much lower superheat temperatures than heretofore attained, yielding improved performance and longer component life.
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Family
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