| 摘要 |
PROBLEM TO BE SOLVED: To perform both the protection of an electric compressor and the prevention of the lowering of a refrigerating capacity when a power voltage varies by controlling the rotational speed variation rate of the electric compressor according to the input current of the electric compressor to a drive control device. SOLUTION: When a current Iin inputted into an inverter controlling the rotational speed of the motor of the electric compressor is equal to or more than a first current threshold Ith1 set beforehand, the inverter is controlled so that the rotational speed Nc of a motor is lowered from an instruction rotational speed Ns from an air conditioner controller as a host controller at a first rotational speed change rate dN1 and, when the current Iin is lowered less than a threshold Ith, the rotational speed of the motor is raised at a second rotational speed change rate dN2 (< dN1). COPYRIGHT: (C)2006,JPO&NCIPI
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