DEVELOPMENT OF 2-CYLINDER ROTARY COMPRESSOR SERIES FOR LIGHT COMMERCIAL USE WITH R410A

摘要

We have developed a DC 2-cylinder rotary compressor series for light commercial air conditionersusing a new refrigerant R410A (HFC) for the first time in the industry.Since it is possible to realize a higher efficiency of an air conditioner system, the new refrigerantR410A has been chosen from a standpoint of global warming prevention. On the other hand, the loadto the compression elements increases because the operating pressure of R410A is about 1.6 times ashigh as that of R22. By adopting the 2-cylinder rotary mechanism and optimizing mechanical partsdimension, the dynamic characteristics of the bearings could be made equivalent to the conventionalcompressor, and we were able to secure high quality.Moreover, this compressor series achieves 20% higher efficiency over wide speed operation rangeand 33 to 50% less weight than conventional compressors by the 2-cylinder rotary mechanism and anew DC motor, which consists of a rotor with a rare-earth permanent magnet and a concentratedwinding type stator.