Theoretic and experimental study on domestic air-conditioner with R410A as refrigerant

The energy-saving characteristic of R410A air conditioner with DC-inverter scroll compressor was analyzed.A parameter-distributing steady mathematic model was established for this air conditioner.With this model,the trend changing with operating frequency of refrigeration capacity,power input and energy efficiency ratio(EER) was calculated.This air conditioner was tested on the air conditioner performance-testing bench in Central South University.The results show that the relative errors of capacity,power and EER are 2.9%,6.2%,3.9% respectively,which verifies that the model established is reliable.For a domestic air conditioner with DC-inverter,EER can reach 4.3 when operating at 20 Hz,but lower than 2.5 when operating at 100 Hz,so it is advised to choose one with higher refrigeration capacity air conditioner with DC-inverter.