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|1. (WO2018219135) CONTROL METHOD FOR REDUCING COMPRESSOR PREHEATING NOISE|
|Applicants:||QINGDAO HAIER AIR CONDITIIONER GENERAL CORP., LTD.
|Title:||CONTROL METHOD FOR REDUCING COMPRESSOR PREHEATING NOISE|
Provided is a control method for reducing compressor preheating noise; when a compressor is preheating, the U, V, and W windings of the compressor are electrified in a time sharing manner; two-phase windings are controlled within each period of electrification, and the electrification current of each phase winding is a wave current; each period of electrification is divided into a plurality of sub-periods; magnitudes of electrification currents within the same sub-period are controlled to be equal, and the magnitudes of electrification currents of adjacent sub-periods are controlled to be unequal; before preheating of the compressor, said control method also comprises: obtaining an outdoor ambient temperature Ta, and determining a preheating time of each preheating period according to the outdoor ambient temperature Ta.