AIR-CONDITIONING APPARATUS
1 Assignment
0 Petitions
Accused Products
Abstract
To obtain an air-conditioning apparatus that appropriately determines the state of stagnating refrigerant in a compressor, and suppresses power consumption while the air-conditioning apparatus is not in operation. When a compressor temperature change rate is determined to be higher than a refrigerant temperature change rate, a controller identifies that liquid refrigerant in a lubricant oil in a compressor has been totally gasified, stops energizing a motor unit, and ends a heating operation of the compressor.
18 Citations
10 Claims
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1-2. -2. (canceled)
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3. An air-conditioning apparatus, comprising:
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a refrigerant circuit connecting a compressor, a heat source side heat exchanger, an expansion valve, and a use side heat exchanger circularly in order with a refrigerant piping; a compressor heating means heating the compressor when the compressor is not in operation; a refrigerant temperature detection means detecting a refrigerant temperature in the compressor; and a controller controlling a heating operation to the compressor, which is carried out by the compressor heating means, wherein the controller estimates the amount of a liquid refrigerant (hereinafter, referred to as liquid refrigerant amount) in the compressor on the basis of a temperature variation of the refrigerant temperature, and controls the heating operation to the compressor, which is carried out by the compressor heating means, on the basis of the estimated liquid refrigerant amount when the compressor is not in operation. - View Dependent Claims (5, 6, 7, 9)
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4. (canceled)
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8. (canceled)
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10-11. -11. (canceled)
Specification