串并联风冷冰箱性能优化

A frost-free air cooled refrigerator with series-parallel refrigeration cycle is studied, and the refrigerating capacity of the refrigerator and energy saving ability is optimized. Also, the influence of optimal charge quantity and optimal mass fraction of zeotropic refrigerant mixture on system performance are analyzed by experimental methods. The results shows that there exist optimal charge quantity and optimal mass fraction of zeotropic refrigerant mixture cause the power consumption and freezing chamber temperature achieve the minimum, which is 1.51 kW·h/d and -40.7℃, respectively. Besides, the experiments data shows that the optimal voltage of the fan fixed in 7.5V can make the power consumption of the refrigerator reduced 10% to 1.16 kW·h/d.