This paper presents an experimental research on configuration optimization of a frost-free refrigerator-freezer with the parallel circuit cycle based on the analysis of circuit switching characteristics. Through combination optimization of R-fan voltage, F-fan voltage, R-capillary tube flow capacity, refrigerant charge, structure of suction pipe, F-compressor speed and R-compressor speed, the system could save 9.27% energy consumption compared with the initial condition. The experimental results also showed that the larger the R-capillary tube flow capacity, the larger the flow rate of the RC, resulting in the quickly temperature drop in R-cabinet and slowly temperature drop in R-cabinet based on “R-cabinet temperature priority” control strategy. Additionally, the R-cabinet temperature drop rate decreased with the increase of ambient temperature but the F-cabinet temperature drop rate was almost unaffected by the ambient temperature.

本文通过对电路开关特性的分析，提出了一种具有并行电路循环的无霜冷藏冷冻库结构优化的实验研究。通过对R风扇电压，F风扇电压，R毛细管流量，制冷剂充注量，吸气管结构，F压缩机转速和R压缩机转速进行组合优化，与之相比，该系统可节省9.27％的能耗。初始条件。实验结果还表明，基于“ R柜温度”，R毛细管的流量越大，RC的流量越大，导致R柜的温度快速下降，R柜的温度缓慢下降。优先”控制策略。另外，