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在机械冷藏车的设计中由于对空气循环和分配系统效率缺乏统一的和有根据的评定方法而遇到了很大的困难,因为空气分配系统是机冷车最重要的功能系统之一。最近,不论在苏联国内,或是在国外,都把通过在机冷车货物间内产生均匀温度场和对货物进行强冷却来保证所运易腐食物质量完好的问题提到首位。实现这些要求现在仍有头等重要意义。但是,全国食品和能源发展纲要所提出的任务使研究课题的方法有某些变化。第一,由于大幅度扩大机械冷藏运输,减少运输过程中食物因干缩而受损的问题更为迫切; 第二,必须普遍节省能耗,这需要提高空气分配系统的动力效率; 第三,在机冷车明显短缺的情况下,尤其在大量运输果菜期间,应保证最大限度的
In the design of mechanical refrigerated trucks, great difficulties have been encountered as a result of the lack of a consistent and informed assessment of the efficiency of the air circulation and distribution system, which is one of the most important functional systems of a chiller. Recently, the issue of ensuring the quality of perishable food shipped intact, both in the Soviet Union and abroad, has been raised by creating a uniform temperature field within the refrigerated cargo and cooling the cargo strongly. Achieving these requirements is still of paramount importance. However, the tasks proposed by the National Food and Energy Development Program make some changes in the methodology of the research topics. First, the issue of drastic expansion of mechanical refrigerated transport to reduce the damage caused by shrinkage of food during transport is even more pressing. Second, energy savings must be generally achieved. This will require an increase in the power efficiency of the air distribution system. Thirdly, In the case of a marked shortage of chiller, especially during the heavy transport of fruit and vegetables, the maximum