To provide a drying device optimally controlling a temperature, a humidity and an air capacity in the device without being affected by weather and season regardless of use of outdoor air, and efficiently performing drying, with respect to the drying device optimally drying potatoes such as sweet potato, vegetables such as pumpkin and carrot, fruits such as grape and persimmon, and fish and shellfish such as cuttlefish and fish.SOLUTION: A drying device includes: outdoor air temperature and humidity measurement means for measuring a temperature and humidity of outdoor air； a device inner temperature and humidity measurement means for measuring a temperature and humidity in the device； measurement means for measuring a drying degree of food as a target of drying process； and memory means for memorizing control information for optimally performing drying processing of the target food. The device reads out the control information for optimally performing drying processing of the object food from the memory means, and drive-controls a fan and a heater in the device and a plurality of valves of a circulation duct, on the basis of the outdoor air temperature, the outdoor air humidity, the temperature and humidity in the device, and the drying degree of the object food.SELECTED DRAWING: Figure 1【課題】 本発明はさつま芋等の芋類、カボチャや人参等の野菜類、更にブドウや柿等の果実類、更にイカや魚等の魚貝類の乾燥を最適に行う乾燥装置に関し、外気を利用するにも関わらず、天候や季節に影響されず、装置内の温度と湿度と風量を最適に制御し、効率よく乾燥を行う乾燥装置を提供するものである。【解決手段】 外気の温度と湿度を計測する外気温度及び湿度測定手段と、装置内の温度と湿度を計測する装置内温度及び湿度測定手段と、乾燥処理の対象である食品の乾燥度を計測する計測手段と、前記対象食品の乾燥処理を最適に行う制御情報を記憶する記憶手段と、を備えた乾燥装置であって、外気温度と外気湿度、及び前装置内の温度と湿度、更に前記対象食品の乾燥度に基づいて、前記記憶手段から、前記対象食品の乾燥処理を最適に行う制御情報を読み出し、装置内のファン、ヒータ、及び循環ダクト内の複数の弁を駆動制御することを特徴とする。【選択図】 図１
