This paper demonstrated the importance of consistency on nominal working conditions in positive displacement compressor standards. Based on summarizing the status of standards for positive displacement refrigerant compressor in USA

Europe and China

the nominal conditions in these standards are contrasted. Key parameters such as evaporation temperature

condensation temperature of existing standard condition are inconsistency. Research progress of American and Chinese standard is introduced. Summed up the revision of compressor standards that key parameters are in the direction of consistency

and more in line with the actual application of the compressor. Nominal conditions harmonization for positive displacement refrigerant compressor in China is related research ideas are discussed.