AIR-CONDITIONING APPARATUS
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United States of America Patent
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Jan 23, 2015
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Jan 23, 2015
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Abstract
An air-conditioning apparatus includes a control unit performing liquid refrigerant equalization control for correcting an imbalance in liquid refrigerant amount between accumulators. The control unit includes a first liquid refrigerant equalization control unit controlling an output of a fan to perform the liquid refrigerant equalization control and a second liquid refrigerant equalization control unit controlling a frequency of a compressor to perform the liquid refrigerant equalization control. The second liquid refrigerant equalization control unit determines an increase or reduction in frequency of the compressor so that a total refrigerant circulation amount is not below a predetermined amount. When a value is within a predefined acceptable range, the control unit selects the first liquid refrigerant equalization control unit to perform the liquid refrigerant equalization control. When the value is outside the acceptable range, the control unit selects the second liquid refrigerant equalization control unit to perform the liquid refrigerant equalization control.
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