Radio Frequency Moisture Removal System for Low-Temperature Drying

The patent replaces conventional thermal heating systems with a radio frequency electromagnetic field system. The RF generators (140, 240) create electromagnetic fields that directly interact with water molecules in the material, causing dielectric heating at the molecular level rather than external thermal heating. This substitution allows moisture removal without the need for high-temperature air heating, thereby eliminating heat damage to heat-sensitive agricultural products while maintaining effective moisture removal capability.

The patent changes the heating parameter from conventional thermal temperature (which causes heat damage) to radio frequency electromagnetic field frequency (typically 13.56 MHz). By operating at this specific RF frequency, the system achieves resonant interaction with water molecules, enabling efficient moisture removal at lower overall temperatures that prevent damage to agricultural products.

The patent replaces energy-intensive thermal air heating systems with radio frequency electromagnetic field generation. The RF generators directly couple energy to water molecules through dielectric loss, achieving much higher energy transfer efficiency compared to conventional air drying where most energy is lost heating the air and surrounding environment rather than the target moisture.

The patent utilizes the dielectric properties of water at radio frequency to directly convert electromagnetic energy into molecular vibration and rotation, which then translates to heat at the molecular level. This direct energy conversion pathway (electromagnetic energy → molecular kinetic energy → heat) is far more efficient than conventional air drying (thermal energy → air convection → material heating → evaporation), significantly reducing energy loss.

The patent divides the drying system into multiple RF generator units (140, 240) that can be independently controlled and positioned around the material. This segmentation allows each generator to treat specific zones, and by coordinating multiple generators, the system achieves both rapid heating in each zone and uniform overall drying across the entire material load.

The RF electromagnetic field system serves multiple functions simultaneously: it provides rapid heating through dielectric loss, penetrates deeply into the material for volumetric heating, and can be uniformly distributed through proper antenna/conductor arrangement. The same RF field mechanism that enables fast heating also ensures uniform energy distribution throughout the material, resolving the contradiction between speed and uniformity.