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1. (WO2018219135) CONTROL METHOD FOR REDUCING COMPRESSOR PREHEATING NOISE

Pub. No.:    WO/2018/219135    International Application No.:    PCT/CN2018/086806
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Wed May 16 01:59:59 CEST 2018
IPC: F24F 11/00
F04C 29/04
F04C 29/06
F04C 28/00
Applicants: QINGDAO HAIER AIR CONDITIIONER GENERAL CORP., LTD.
青岛海尔空调器有限总公司
Inventors: LIU, Jinlong
刘金龙
LIU, Juke
刘聚科
CHENG, Yongfu
程永甫
Title: CONTROL METHOD FOR REDUCING COMPRESSOR PREHEATING NOISE
Abstract:
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.