Thermal cycle device for drying oven

The utility model relates to the technical field of heating manufacturing, and discloses a heat circulation device for a drying oven, which is characterized in that each heating area of the drying oven is provided with an air inlet and an air outlet, each air outlet is provided with an electromagnetic valve, each air inlet is communicated with a dry gas conveying pipeline, and each air outlet is communicated with a dry gas conveying pipeline. The air inlet of the first heating area is further communicated with the air outlet of the last heating area, the air inlet of the second heating area is also communicated with the air outlet of the last but one heater, and so on until the last two heating areas are communicated, and the electromagnetic valves are used for controlling the on-off of the corresponding air outlets. The whole device is simple in structure, easy to assemble, low in maintenance difficulty and convenient to popularize and apply. 本实用新型涉及加热制造的技术领域，公开了一种用于烘箱的热循环装置，其特征在于：所述烘箱的每个加热区均设置有进风口、排风口，在每个所述