Manual Weeding Apparatus with Bell Holes for Targeted Thermal Shock

The patent replaces chemical phytosanitary liquids with a thermal field generated by a heating resistor to destroy weeds. The heating resistor projects a jet of hot air that causes thermal shock to the weed roots, eliminating the need for chemical substances and their associated environmental and economic problems.

The patent changes the physical parameter from chemical (phytosanitary liquid) to thermal (hot air jet). By controlling the temperature parameter of the air jet through the heating resistor, the system achieves effective weed destruction without chemicals, making it both economical and ecological.

The patent replaces the gas combustion system with an electric heating resistor system. Instead of using flammable gas that requires storage, handling, and ignition, the system uses an electric heating element that generates heat on-demand without any gas storage or handling, eliminating safety risks.

The patent introduces air as an intermediary medium to transfer thermal energy. The heating resistor heats air, which then serves as the active agent to destroy weeds through thermal shock. This eliminates the need for direct flame contact and gas handling while maintaining weed destruction effectiveness.

The patent uses periodic action by projecting intermittent jets of hot air through the bell onto the weed. The fan creates periodic flow patterns that deliver concentrated thermal shock to the weed roots, achieving faster destruction compared to continuous steam heating.

The patent applies local quality by concentrating thermal energy at specific locations. The bell structure focuses the hot air jet onto a localized area of the weed, delivering intense thermal shock to the roots while minimizing heating of surrounding areas, thus reducing overall heating time.

The patent segments the bell structure by introducing multiple holes at specific locations. This segmentation allows controlled discharge of hot air through designated openings rather than uncontrolled escape, directing the thermal shock precisely where needed while preventing random scattering that would damage neighboring plants.

The hole arrangement creates a feedback mechanism where the position and size of holes control the hot air flow patterns. The design ensures that hot air is discharged in a controlled manner that prevents apparatus overheating while maintaining effective weed destruction, allowing the system to self-regulate thermal energy distribution.