| 摘要 |
PROBLEM TO BE SOLVED: To solve problems in a conventional control method for controlling an operation of a compressor by comparing a measured value or a calculated value obtained from the measured value and a threshold value in the operation control of a refrigerating device comprising an invertor compressor and a constant-speed compressor, that it is difficult to accurately grasp a condition of the refrigerating device and to efficiently output a necessary refrigerating capacity. SOLUTION: An operational frequency and the number of operated device to allow the refrigerating device to output the refrigerating capacity necessary for the refrigerating cycle, can be determined from the present operational frequency, the number of operated device, a suction pressure and a suction temperature. As the operational frequency and the number of operated device are calculated while considering a rate of change of the suction pressure, excess and deficiency of the refrigerating capacity can be prevented and energy-saving operation can be performed. COPYRIGHT: (C)2008,JPO&INPIT
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