17 March 2005
In recent years, there has been a growing need for high-efficiency air conditioners as a means of preventing global warming. In response to this need, we have developed very high efficiency multi-split air conditioners for use in office buildings by using R410A refrigerant, which is suitable for higher efficiency, and by improving the efficiency of main components such as compressors, controllers, fans and heat exchangers. In addition, we have improved the partial load efficiency by using variable-speed compressors and inverter drives for their motors. As a result of this improvement, the annual energy consumption of this air conditioner is reduced by half compared to conventional models.