Control method of centrifugal compressor and air conditioning system

The invention provides a control method of a centrifugal compressor and an air conditioning system. The control method of the centrifugal compressor comprises the steps that S100, when the inlet opening degree of the centrifugal compressor is lower than a first preset value, a driving motor of the centrifugal compressor is closed; or S200, when the inlet opening degree of the centrifugal compressor is not lower than the first preset value, the following operation is executed according to the preset sequence: the inlet opening degree of the centrifugal compressor is reduced, and the rotating speed of the centrifugal compressor is increased. According to the scheme, the control method of the centrifugal compressor provides higher reliability, longer service life and lower noise for the air conditioning system applying the centrifugal compressor. 本申请提供一种离心压缩机的控制方法及空气调节系统。该离心压缩机的控制方法包括：S100，在所述离心压缩机的入口开度低于第一预设值时，关闭所述离心压缩机的驱动电机；或者S200，在所述离心压缩机的入口开度不低于第一预设值时，依照预设顺序来执行如下操作：减小所述离心压缩机的入口开度，以及增大所述离心压缩机的转速。根据本申请的方案，该离心压