Centrifugal compressor

This centrifugal compressor is characterized by being provided with: a rotation shaft; a main casing which encloses at least part of the rotation shaft and which has an inlet and an outlet spaced away from each other in the axial direction of the rotation shaft and which has an annular space enclosing part of the rotation shaft to the inlet side and communicating with the inlet; at least one impeller which, in a state fixed to the rotation shaft, is arranged inside of the main casing; a rectifier member which extends along the axial direction of the rotation shaft arranged inside of the annular space; multiple injection holes which are provided along the rectifier member and which are spaced away from each other in the axial direction of the rotation shaft; and a flow path which extends in the annular space and through which a cleaning solution can flow for supply to the multiple injection holes. 本发明提供种离心式压缩机，其特征在于，所述离心式压缩机具备：旋转轴；主壳体，其是包围所述旋转轴的至少部分的主壳体，该主壳体具有在所述旋转轴的轴线方向上相互分离的入口以及出口，并且具有包围所述入口侧的所述旋转轴的部分且与所述入口连