Surface Drying Device for Non-Permeable Sheets Using Coanda Air Shield

The drying process is segmented into multiple zones: a heating zone with high-temperature air nozzles for rapid evaporation, and a cooling zone with low-temperature air nozzles for controlled drying. This segmentation allows efficient energy use by concentrating heating only where needed rather than heating the entire material uniformly.

Different regions of the material receive different treatment: the surface with adhering liquid receives high-temperature air for rapid evaporation, while other regions receive lower temperature air. This local quality approach ensures effective drying of the liquid-bearing areas without wasting energy on already dry portions.

The drying system uses periodic alternation between high-temperature air supply (for rapid evaporation) and low-temperature air supply (for uniform cooling and drying). This periodic action prevents overheating in localized areas while maintaining high drying speed through controlled thermal cycles.

The system incorporates sensors to detect the drying state of the material and automatically adjusts the temperature and air flow parameters. This feedback control ensures uniform drying by compensating for non-uniform solvent distribution in real-time, maintaining both high productivity and drying uniformity.

Instead of extending the drying device in the horizontal direction (increasing length), the invention uses vertical arrangement of heating and cooling zones, and three-dimensional air flow patterns. This dimensional transformation achieves efficient drying while maintaining compact device footprint.

The heating function and cooling function are merged into a single integrated drying chamber with multiple air nozzle groups. This combination achieves the drying efficiency of a long device while maintaining compactness by consolidating functions in a compact configuration.