| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that there are generated an excess and a shortage of an output when excessively restraining the start/stop of a constant speed compressor, though the start/stop of the constant speed compressor is restrained for preventing consumption when the constant speed compressor repeats the start/stop, in a refrigerating unit having a variable speed compressor and the constant speed compressor. SOLUTION: Low pressure is measured by a pressure detector, and reference low pressure is calculated from the present low pressure and the past low pressure, and when the reference low pressure reaches a lower limit value or lower of a predetermined range and a signal is outputted from a start/stop restraining device for restraining the start/stop of the constant speed compressor, a restraining signal is invalidated after a predetermined time passes after the restraining signal is generated from the start/stop restraining device. COPYRIGHT: (C)2009,JPO&INPIT
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