MUMBAI, India, Aug. 12 -- Intellectual Property India has published a patent application (202621067081 A) filed by Anand Kumar Sahu; Salik Ram Dhimar; Ajay Kumar Gupta; Hemant Kumar Mahobiya; Divyanshu Dewangan; Sushma Sahu; and Sunil Sharma on May 28, 2026, for Direct-Type Multi-Shelf Passive Solar Dryer.
Inventors include Anand Kumar Sahu; Salik Ram Dhimar; Ajay Kumar Gupta; Hemant Kumar Mahobiya; Divyanshu Dewangan; Sushma Sahu; and Sunil Sharma.
The application for the patent was published on August 07, 2026, under issue no. 32/2026.
Abstract: ABSTRACT “DIRECT-TYPE MULTI-SHELF PASSIVE SOLAR DRYER" A domestic direct-type multi-shelf passive solar dryer apparatus (100) for drying agricultural produce is disclosed. The apparatus (100) comprises a glazed cabinet enclosure (100) containing a plurality of vertically arranged perforated drying trays (103), air inlet openings (107) at a lower portion, air outlet openings (108) at an upper portion, selective thermal insulation (105), and an inclination mechanism (116) for solar exposure. The invention introduces an integrated internal air-management module (109) embedded within the cabinet (100), comprising vertical distribution channels (110) along interior walls, horizontal tray-level distribution channels (111), air deflector elements (112) positioned adjacent to tray edges, pressure- equalization pathways (113) between vertical regions, and a thermal distribution plate (114) located below the trays. The internal arrangement forms a structured airflow distribution system that utilizes buoyancy-driven natural convection to achieve substantially uniform airflow and temperature distribution across all trays (103). The apparatus (100) enables consistent and contamination-free drying while maintaining a simple, passive, and energy-independent construction without the need for external collectors, fans, or powered components.
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