Patent ID: 6941673

Claim:
A closed-type drying system comprising: a drying chamber, said drying chamber comprising a plurality of white glass windows formed in peripheral walls thereof for enabling the radiation energy of the sun to pass to the inside of said drying chamber; a condensation and heating system connected between two distal ends of said drying chamber and forming with said drying chamber a circulation loop, said condensation and heating system comprising an air blower adapted to blow a flow of air through said drying chamber, a heater adapted to heat the flow of air passing through said drying chamber, two evaporators adapted to condense moisture from the flow of air passing out of said drying chamber, a heat energy reclamation chamber connected between said air blower and said evaporator, a condenser mounted inside said heat energy reclamation chamber and adapted to preheat the flow of air passing through said heat energy reclamation chamber, a first compressor mounted in said heat energy reclamation chamber and adapted to exchange heat with the flow of air passing from said evaporators to said heat energy reclamation chamber, and a second compressor adapted to provide low temperature conditions in the drying chamber; and an automatic control system, which controls the operation of said air blower, said heater, said evaporators, said condenser, said first compressor, and said second compressor.