Refrigerant compressor and refrigerant system

according to an exemplary aspect of the present disclosure, provided are a refrigerant compressor and a refrigerant system. The refrigerant compressor mainly includes a first compression stage arranged in a main refrigerant flow path. The first compression stage is a mixed compression stage having both axial and radial components. The compressor further includes a second compression stage arrangedin the main refrigerant flow path downstream of the first compression stage. The second compression stage is a radial compression stage. 根据本公开的示例性方面，提供一种制冷压缩机和制冷系统。该制冷压缩机主要包括布置在制冷剂主流动路径中的第一压缩段。第一压缩段是既有轴向分量又有径向分量的混合压缩段。该压缩机还包括布置在制冷剂主流动路径中、位于第一压缩段下游的第二压缩段。第二压缩段是径向压缩段。