Objective: Solve the problems of uneven heating, heat loss and high power consumption of traditional tea frying device. Methods: Using carbon based high temperature heating coating material, a surface heating source was formed at the bottom of the glass-ceramic tea frying vessel by spraying. The corresponding tea roasting device, green removing device and conveying device were innovatively designed. Based on STM32, the circuit modules of temperature detection, temperature control and display, stir frying and rubbing tea switching were designed. Results: The maximum power consumption of the whole machine was 3 kW, and the size of the whole machine was 350 mm×150 mm×280 mm. The temperature control range was 20~400 ℃, and the temperature control accuracy was ±1 ℃. The shortcomings of the traditional manual tea making process such as temperature control inaccurate and tea kneading process uncontrollable were solved. Conclusion: The machine combines the two processes of killing green tea and kneading tea, which can realize the independent action switching of "three killing and three kneading" process, and realizes the automation of green tea production process.
Can-ke, QIN; Xing-man, CHEN; Jin-yao, ZHANG; Shen-jiang, WU; and Dang-juan, LI
"A new tea roasting machine with carbon-based coating as heating source,"
Food and Machinery: Vol. 38:
8, Article 20.
Available at: https://www.ifoodmm.cn/journal/vol38/iss8/20
 宋宪颖,黄艳梅,崔俪丹,等.杀青方法对紫色芽叶加工绿茶品质的影响[J].食品与机械,2021,37(11):19-27.SONG X Y,HUANG Y M,CUI L D,et al.Effects of different fixation methods on the quality of green tea processed by purple bud leaves[J].Food & Machinery,2021,37(11):19-27.
 胡源,刘梦圆,周秦羽,等.干燥工艺对红茶品质的影响[J].食品与机械,2021,37(6):191-200,232.HU Y,LIU M Y,ZHOU Q Y,et al.Effects of different dring process on the quality of black tea[J].Food & Machinery,2021,37(6):191-200,232.
 杨君,刘木华,阮承治,等.球罐型360°茶叶摇青机设计及实验验证[J].食品与机械,2020,36(10):81-86.YANG J,LIU M H,RUAN C Z,et al.Design of spherical type 360° of tea stirring machine,flow field analysis and experimental analysis[J].Food & Machinery,2020,36(10):81-86.
 廖可造.6CS-60型滚筒式茶叶杀青机定型[J].农业机械,1984(3):6.LIAO K Z.6CS-60 drum type tea green killing machine[J].Transactions of the Chinese Society for Agricultural Machinery,1984(3):6.
 权启爱.我国茶叶杀青机的研制和发展[J].中国茶叶,2017,39(10):19-21.QUAN Q A.Research progress of tea smashing machine in China[J].China Tea,2017,39(10):19-21.
 吴全金,孙威江,吴占富.远红外加热技术在茶叶加工及制品中的研究进展[J].农机化研究,2014,36(4):220-224,228.WU Q J,SUN W J,WU Z F.Research progress of far infrared heating technology in tea processing and products[J].Journal of Agricultural Mechanization Research,2014,36(4):220-224,228.
 张成茂,陈子超,庄少林.热风式茶叶滚筒杀青机优化设计[J].农业开发与装备,2018(2):95-96.ZHANG C M,CHEN Z C,ZHUANG S L.Optimization design of hot air tea drum green killingmachine[J].Agricultural Development & Equipments,2018(2):95-96.
 庆奕良,王国志,刘文兴,等.导电涂料的简介及研究现状[J].现代涂料与涂装,2020,23(11):41-44.QING Y L,WANG G Z,LIU W X,et al.Introduction and research of conductive coatings[J].Modern Paint & Finishing,2020,23(11):41-44.
 吴慎将,李党娟,王娜,等.一种提高玻璃基底发热涂层工作稳定性的方法:201910430409.X[P].2019-07-19.WU S J,LI D J,WANG N,et al.A method for improving the working stability of heating coating on glass substrate:201910430409.X[P].2019-07-19.
 HE X,YU X,WANG Y,et al.Significantly enhanced thermal conductivity in polyimide composites with the matching of graphene flakes and aluminum nitride by in situ polymerization[J].Polymer Composites,2020,41(2):740-747.
 CHANG H,JIA Y,XIAO L,et al.Three dimensional crosslinked and flexible graphene composites paper with ultrafast electrothermal response at ultra-low voltage[J].Carbon,2019,154:150-155.
 GRASSI E,TSAKALIS K.PID controller tuning by frequency loop-shaping:Application to diffusion furnace temperature control[J].IEEE Transactions on Control Systems Technology,2015,8(5):842-847.
 施兆鹏.茶叶审评与检验[M].4版.北京:中国农业出版社,2010:85-89.SHI Z P.Tea evaluation and inspection[M].4th ed.Beijing:China Aguricultural Press,2010:85-89.