An intelligent frequency conversion control method for the circulating fan in the descending intensive curing barn during tobacco leaf curing

Abstract

The invention discloses an intelligent frequency conversion control method for a circulation fan in a descending intensive curing barn for tobacco leaves baking. After the tobacco leaves are loaded into the barn to start baking as required, an intelligent frequency conversion regression equation is constructed sequentially according to the following ten situations. The frequency conversion regression equation was constructed according to the changes in parameters such as the target dry and wet bulb temperature, the actual dry and wet bulb temperature and the temperature difference between the upper and lower sheds of tobacco leaves set at each stage. According to the importance and contribution of the target dry bulb temperature difference (a), the upper and lower shed temperature difference (b) and the wet bulb temperature difference (c) in each curing stage to the tobacco leaf curing process, the present invention assigns coefficients respectively, and the coefficient range is 0 ~1. The present invention provides a favorable guarantee for improving the softness of tobacco leaves, increasing the aroma and oil content of tobacco leaves, enhancing the chroma of tobacco leaves, and avoiding stiffness.

Description

Technical field [0001] The present invention relates to a control method of intelligent frequency decreased circulation fan when dense tobacco curing barn, belongs to the field of baking Tobacco. Background technique [0002] Compared with the traditional bulk curing barn natural ventilation barn, grilled bad smoke phenomenon significantly reduced, but also the prevalence of tobacco subdued colors, oil reduction, reducing the aroma and other phenomena, mainly due to less intensive barn currently circulating fan gear, intelligent frequency conversion means lack of intelligent variable frequency control method is not flexible, and can not be automatically adjusted according to the real-time frequency tobacco curing process requirements and barn temperature and humidity changes, thus making the yellow pre fans invalid operation leads to a lot of water loss, while dry air flow through the muscle of large cause problems such as loss of volatile aroma components. Inventive content [...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an intelligent frequency conversion control method for the circulating fan in the descending dense curing barn when the tobacco leaves are roasted, so as to solve the problem that the circulating fan in the intensive tobacco leaf curing barn cannot meet the requirements of the tobacco leaf curing process and the barn. Technical problems such as light color, reduced oil content, and reduced aroma of cured tobacco leaves caused by automatic real-time frequency conversion adjustment of temperature and humidity changes

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