| 摘要 |
The invention relates to a method for controlling refrigerating installations, the method comprising steps of selecting two or more compressors, at least two of which differ in output, connecting one or more of the selected compressors each to its own frequency converter, coupling the selected compressors in series so as to provide a refrigerating unit, controlling the frequency range of the compressors controlled by the frequency converters such that they provide continuous power control and controlling the obtained refrigerating unit to meet the required output need by starting and stopping the compressors and by controlling the frequency of the compressors connected to the frequency converters.
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