educational air cooling device 3d model

Create a 3D printable STL model of an educational air cooling device designed as a demonstration model. The system should visually explain how air is cooled and directed using a clear airflow path. Include a front air intake section with a fan, a guided airflow tunnel, a cooling chamber with grid or filter-like structure, and an air outlet. The design should emphasize airflow direction and heat exchange using large, visible internal channels. Incorporate built-in directional arrows and flow guides along the internal ducts to show how air enters, passes through the cooling section, and exits. Use a cutaway or partially open design so all internal airflow paths are easy to observe. Make the geometry simple, durable, and easy to understand, with slightly oversized components for educational clarity. All parts must be connected into a single solid model, with thick walls, no floating parts, and optimized for FDM 3D printing. Style: clean engineering model, didactic prototype, medium de