Air-conditioning apparatus
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United States of America Patent
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Oct 23, 2018
Grant Date -
Sep 3, 2015
app pub date -
Nov 21, 2012
filing date -
Nov 21, 2012
priority date (Note) -
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Abstract
A controller performs medium pressure control that controls the opening degree of a second expansion device based on a deviation between a target value of medium pressure, and a detection result of a medium pressure detector or a predicted value. The controller controls the opening degree of a third expansion device based on a target value of a discharge refrigerant temperature of a compressor or a target value related to the discharge refrigerant temperature, and a detection result of a discharge refrigerant temperature detector or a value related to the discharge refrigerant temperature computed using a detected detection result, and regulates a flow rate of refrigerant to supply to a suction side of the compressor via an injection pipe.
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