射频场内孔分散结构对物料温度分布及其杀虫效果的影响  

Effects of Pore Dispersed Structure on the Material’s Temperature Distribution and Deinsectization in Radio Frequency Treatment

作　　者：肖逵 唐亚丽 卢立新 丘晓琳 王军[1,2] Xiao Kui;Tang Yali;Lu Lixin;Qiu Xiaolin;Wang Jun(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,Jiangsu;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology,Wuxi 214122,Jiangsu)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江苏省食品先进制造装备技术重点实验室,江苏无锡214122

出　　处：《中国食品学报》2022年第1期108-115,共8页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家自然科学基金项目(31671909)。

摘　　要：为解决射频杀虫时加热不均匀而导致杀虫不彻底的问题,从孔方向、空实心、孔数量、孔径和分布方式方面研究孔分散结构在提升射频加热速率和加热均匀性方面的作用以及在杀虫方面的应用。以大米为材料,试验发现在促进加热效果上竖向分散结构优于横向,空心优于实心。当孔径相同时,孔数量越多效果越好。当孔数量相同时,孔径越大效果越好。等距分布具有最高的加热速率,而冷区集中分布具有最好的加热均匀性。将12孔22 mm的分散结构用于射频杀虫,在加热7min后,孔分散结构使样品中米象死亡率从对照组的16.8%提至100%。对于赤拟谷盗,射频加热10 min后,孔分散结构使样品中赤拟谷盗的死亡率从对照组的8.7%提至98.1%。In order to solve the problem of incomplete deinsectization caused by uneven heating of radio frequency,this paper studied the role of pore dispersion structure in improving the radio frequency heating rate and the heating uniformity and its application in insecticidal application from the aspects of pore direction,hollow solid,pore number,pore diameter and distribution mode.Taking rice as an example,it was found that the vertical dispersed structure was superior to the horizontal structure and the hollow structure was superior to the solid core in promoting the heating rate.With the same pore size,the more holes,the better the effect.With the same number of holes,the larger the diameter,the better the effect.The equidistant distribution has the highest heating rate,but the concentrated distribution of the cold area has the best heating uniformity.After using the 12-pore 22 mm dispersed structure for radio frequency deinsectization,the death rate of adult rice weevils in the samples increased from 16.8% in the control group to 100% after heating for 7 min.For the red flour beetle,the death rate increased from 8.7% in the control group to 98.1% after radio frequency heating for 10 min.

关 键 词：分散结构 射频加热 杀虫 加热速率 加热均匀性 

分 类 号：TS210.4[轻工技术与工程—粮食、油脂及植物蛋白工程]