| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compressor drive control device for an air conditioner capable of reducing unnecessary electric power consumption as much as possible by enhancing accuracy of determining whether or not a refrigerant flooded state occurs and of efficiently preventing the refrigerant flooded state. SOLUTION: When a compressor is stopped, voltage for determining the refrigerant flooded state is applied to a motor for driving the compressor, and based on the voltage and current made to flow in the motor when the voltage is applied, winding impedance of the motor is calculated. Based on the calculated winding impedance, winding temperature is estimated, and based on the estimated winding temperature and refrigerant saturation temperature obtained by converting refrigerant pressure detected by a pressure detector on the suction side or discharge side of the compressor at that time, whether or not the refrigerant flooded state where a liquid refrigerant is stored within the compressor occurs is determined. When the occurrence of refrigerant flooded state is determined, a heating means heating the refrigerant within the compressor is operated, and when the refrigerant flooded state is eliminated by the operation of the heating means, the operation of the heating means is stopped. COPYRIGHT: (C)2011,JPO&INPIT |
