It is its working principle to turn the air of ambient temperature into hot and dry air via heat exchanger. Acted by the blower fan, the drying effect is obtained through heat exchange between the hot air and material. The top features of the box-type dryer are easy operation, automatic temperature adjustment, pre-setting of air volume and pressure. It has advantages of wide applicability and practicability, good hygienic conditions, easy cleaning and easy maintenance. Parts in contact with food or the entire machine are made of stainless steel, fully complying with hygienic requirements for export.