Discussion on energy efficiency of central air conditioning units with vapor compression cycle

Presents energy efficiency requirement of central air conditioning units of US and the Mainland and Taiwan of China. Analyses the unit efficiency of the Mainland products. The results show that the real values of energy efficiency of most products are higher than the minimum allowable value required by GB/T 18430.1-2001 but under the demand of developed countries. It is necessary to improve the related energy efficiency standards.