中文摘要：

改变回风道的长度、宽度和高度等尺寸参数,搭建基于差压原理的冷藏车厢试验平台进行参数组合正交试验,在相同的风机频率、开孔隔板开孔率和包装箱堆码方式的条件下,分别进行制冷和加湿试验,以中纵截面和中横截面的不均匀度为考核指标,进行方差分析、直观分析和极差分析,研究不同回风道参数对冷藏车厢内温湿度场分布的影响。结果表明,当回风道参数（长×宽×高）为1500 mm×500 mm×60 mm时,车厢内温度场的均匀性最优;当回风道参数为1 500 mm×800 mm×80 mm时,车厢内的湿度场最均匀。利用权重综合值分析法综合温、湿度场对正交试验组合进行评价,得出综合最优的回风道参数组合是1 500 mm×500 mm×60 mm。

英文摘要：

We changed the length,width and height parameters of return air duct,established refrigeration compartment test platform,got on parameter combinations orthogonal experiments under the same conditions of blower frequency,opening bulkhead opening rate and crate stacking method,respectively conducted cooling and humidification tests taking unevenness in longitudinal section and cross section as assessment indicators,variance analysis,visual analysis and range analysis were used to study the influences of different parameters of return air duct on uniformity distribution of temperature and humidity within the refrigeration compartment. The results showed that,when the return air duct parameter（length × width × height）was 1 500 mm × 500 mm × 60 mm,the temperature had the most uniformity;when return air duct parameter was 1 500 mm × 800 mm × 80 mm,the humidity had the most uniformity. Using weight comprehensive value analysis integrated temperature and humidity field on a combination of orthogonal experiment to evaluate the results of the return air duct,the optimal combination of parameters was 1 500 mm × 500 mm × 60 mm.