Improvements in Compressors with Special Emphasis on Interesting Developments in Japan

This paper is intended as a review of the recent research and development of refrigeration and gas compressors in Japan. The review has been carried out by the papers as source material that are reported in the transactions, proceedings, and magazines in mechanical engineering field. Most compressor companies in Japan have long efforted to develop and apply advanced technology for innovative refrigeration and gas compressor equipment and components. This effort is aimed at systems that can achieve sufficient energy cost reduction compared with current compressors. Increased efficiency has the potential for significantly lowering energy cost through improvement of performance and reliability and through reduction in the number of parts that must get higher productivity and their maintenance and operation. This trend promotes the development of rotary compressors such as rolling piston rotary compressor, mono-screw compressor, and scroll compressor.