2017 Volume 34 Issue 3 Pages 261-
The authors studied elemental technologies that realize large capacity and high efficiency in rotary compressors in order to achieve energy and resource savings and weight reduction of the heat pump systems. These technologies are the optimization of cylinder dimensions, the development of a new discharge structure, the compatibility between sliding loss reduction and securing of reliability in the sliding parts, the newly developed motor, and the use of PWM converter. We developed and commercialized a model that increased maximum refrigeration capacity by about 1.7 times compared to our conventional large model and improved the COP ratio by about 6% in the full capacity range compared to that conventional one. We also worked on reducing the amount of rare earth magnet usage and improving PWR (Power Weight Ratio), and obtained the effects of resource saving and weight reduction by increasing the capacity of the rotary compressor.
