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US 9,989,943 B2Granted
HVAC systems and controls
AssigneeTrane International Inc.
InventorsThomas J. Clanin, Scott A. Munns, Lee L. Sibik
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Abstract
The embodiments disclosed herein are directed to systems and methods to control a HVAC system based on a state of an unloader of a compressor of the HVAC system.
Claims7
A method of controlling a HVAC system, comprising:
- obtaining an unloader state of an unloader of a compressor of the HVAC system, the unloader being a device located between an inlet and an outlet of the compressor and configured to control a gas flow through the compressor;
- obtaining a control parameter based on the unloader state;
- and
- controlling the HVAC system based on the control parameter,
- wherein obtaining the unloader state of the compressor of the HVAC system includes:
- obtaining a compressor operation condition;
- obtaining a measurable parameter of the compressor;
- and
- estimating the unloader state based on an association between the unloader state and the measurable parameter of the compressor according to the obtained compressor operation condition, the association between the unloader state and the measurable parameter of the compressor is represented by a first curve,
- wherein obtaining the control parameter based on the unloader state is based on an association between the estimated unloader state and the control parameter according to the obtained compressor operation condition, and the association between the estimated unloader state and the control parameter is represented by a second curve.
7 more elements
Dependencies are inferred from the claim text.