Intelligent frequency conversion control method for circulating fan during tobacco leaf curing in descending bulk curing barn

Abstract

The invention discloses an intelligent frequency conversion control method for a circulating fan during tobacco leaf curing in a descending bulk curing barn. After tobacco leaves are loaded into a curing barn as required and begin to be cured, an intelligent variable-frequency regression equation is constructed according to the following ten conditions in sequence, and the intelligent variable-frequency regression equation is constructed according to changes of parameters such as the target dry-wet bulb temperature, the actual dry-wet bulb temperature and the upper and lower shed tobacco leaftemperature difference set in each stage. According to the importance and contribution degree of the target dry bulb temperature difference (a), the upper and lower shed temperature difference (b) andthe wet bulb temperature difference (c) in each baking stage to the tobacco leaf baking process, coefficient assignment is conducted, the coefficient range is 0-1, and beneficial guarantees are provided for improving the softness of tobacco leaves, increasing the aroma and oil content of the tobacco leaves, enhancing the chromaticity of the tobacco leaves and avoiding stiffness.

Description

technical field

[0001] The invention relates to an intelligent frequency conversion control method for a circulating fan when tobacco leaves are roasted in a descending intensive curing barn, and belongs to the field of flue-cured tobacco roasting. Background technique

[0002] Compared with the traditional naturally ventilated curing barn, the phenomenon of bad smoke is significantly reduced in the intensive curing barn, but there are also common phenomena such as light color of tobacco leaves, reduced oil content, and reduced aroma. The main reason is that the current intensive barn The means of frequency conversion is lacking, the intelligent frequency conversion control method is not flexible, and the automatic real-time frequency conversion adjustment cannot be performed according to the needs of the tobacco leaf curing process and the temperature and humidity changes in the barn, which leads to the ineffective operation of the fans in the early stage of yellowing, resul...

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