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【关键词】 差压预冷; 冷却速度; 冷却均匀性; 【英文论文关键词】 Pressure pre-cooling Cooling rate Cooling uniformity; 【论文摘要】 冷却速度和冷却均匀性是评价果蔬差压通风预冷效果的重要内容。本文提出了衡量冷却均匀性的量化指标-均匀度。建立了果蔬差压通风预冷实验台,对黄金梨的差压预冷过程进行了试验研究。分析了不同送风速度、不同包装箱开孔形状及不同开孔面积等参数对黄金梨预冷速度和冷却均匀性的影响。结果表明,冷风送风速度在1.5-2m/s较好;椭圆形开孔冷却速度较快,圆形孔的预冷均匀性较好,键槽形孔的冷却速度和冷却均匀性都比较差;开孔当量直径在45mm左右为宜。 【英文论文摘要】 Cooling rate and cooling uniformity are important contents which evaluate pressure pre-cooling effects of fruits and vegetables. A quantitative parameter which judges the effect of cooling uniformity is put forward in this paper. Pressure pre-cooling experimental device is established and experimental investigations of golden-pear pre-cooling process have been conducted. The effects of different parameters on cooling rate and cooling uniformity have been analyzed such as different airflow rates, vent hole f...