In traditional horizontal airflow box dryers, the airflow only passes over the surface of the material, which has the drawbacks of low heat transfer coefficient, poor heat utilization, and extended drying time for the material. Additionally, due to structural deficiencies, they cannot fully comply with the "GMP" pharmaceutical production standards. To overcome these shortcomings.
The machine uses a fan to filter a portion of fresh air through three-stage high-efficiency filtration, achieving ten million-level purification. The air is then heated to a certain temperature by a steam heat exchanger. After passing through a filter to purify the heated air, it is distributed evenly to each layer by the分流板 on the left. Moist air is extracted from the inclined duct under the drying tray, some of which is exhausted from the oven by a centrifugal fan, while the rest is recirculated for further heating to achieve the drying goal.

Each hot air cycle passes through medium or high-efficiency filters, effectively preventing the material from degrading during the recirculation heating process and contaminating pharmaceuticals, fully complying with pharmaceutical production standards.
The through-flow oven has a higher drying capacity than the cross-flow oven, with each layer of material loaded at a thickness three times greater than that of the cross-flow oven.
The airflow oven features a large area, high efficiency, and several times the capacity of the crossflow oven at a lower cost.
Drying suitable for various granular and blocky materials.
Easy to operate, quick cleaning and replacement, low failure rate.
Air filters are installed at both air inlets and outlets to prevent contamination of materials, ensuring their quality is unaffected.
The heating source for the oven can be steam, thermal oil, or electric heating.