热泵干燥温度对柿子片干燥特性及品质的影响

目的:探明热泵干燥温度对柿子片干燥特性和品质的影响。方法:以柿子为原料,研究干燥温度对柿子片干燥时间、干燥速率,以及干制品色泽、硬度、复水率、单宁、总糖、维生素C和总酸的影响。结果:当热泵干燥温度为65℃时,柿子片干燥速度快,干燥时间短,此时干燥产品色泽鲜艳,与鲜果色泽相近,复水性能好,硬度最低,口感最好,总酸和维生素C含量最高,总糖等营养成分含量适中。结论:柿子片的最适热泵干燥温度为65℃。

Effects of heat pump drying temperature on drying characteristics and quality of persimmon slices

Objective:In order to explore the effect of heat pump drying temperature on the drying characteristics and quality of persimmon slices;Methods:Taking persimmon as the raw material,the effects of different drying temperatures were compared,on the drying time,drying rate,color,hardness,rehydration rate,tannin content,total sugar,vitamin C and total acid content of dried persimmon slices.Results:when the heat pump drying temperature was 65℃,the drying rate was higher and the drying time was shorter.The dried persimmon slices dried at 65℃ had bright color,similar to fresh fruit color,good rehydration performance,the lowest hardness,the best taste,the highest content of total acid and vitamin C,and moderate content of total sugar and other nutrients.Conclusion:The drying temperature of 65℃ is better than other drying temperatures when using heat pump to dry persimmon slices.