Cavitation Cleaning Nozzle for Pharmaceutical Residue Removal

The patent changes the parameters of the cleaning fluid by mixing gas (carbon dioxide) with liquid (water) to create a gas-liquid mixture. This mixture is then pressurized to high pressure and ejected through a nozzle with a specific flow passage cross-sectional area ratio to generate cavitation. The parameter change from simple high-pressure water to cavitation-inducing gas-liquid mixture resolves the contradiction by providing both high cleaning speed and enhanced cleaning capability for stuck residues.

The patent utilizes phase transitions of the cleaning fluid by creating a gas-liquid mixture that undergoes cavitation (liquid-to-gas phase transition) when ejected at high pressure. The cavitation bubbles collapse and generate intense local cleaning action that effectively removes stuck residues. This phase transition mechanism enables the cleaning device to achieve both high cleaning speed and superior cleaning capability simultaneously.

The patent replaces chemical cleaning mechanisms with a physical cleaning mechanism based on high-pressure gas-liquid mixture ejection and cavitation. Instead of using chemical agents to dissolve and remove residues, the system uses mechanically generated cavitation bubbles that collapse to create intense localized cleaning force. This substitution eliminates chemical contamination while maintaining or enhancing cleaning capability for stuck residues.

The patent employs pneumatic and hydraulic principles by using pressurized gas (carbon dioxide) mixed with liquid (water) to create a high-velocity jet. The pneumatic pressure drives the hydraulic fluid through a specially designed nozzle that generates cavitation. This gas-liquid dynamics approach provides powerful mechanical cleaning action without requiring chemical agents, thus avoiding chemical contamination and validation issues.

The patent implements self-service cleaning by using the cleaning fluid itself to generate the cleaning action through cavitation. The high-pressure gas-liquid mixture automatically generates cavitation bubbles that collapse on contact with residues, providing self-enhancing cleaning capability without requiring manual brush intervention. This automation maintains superior cleaning capability while dramatically simplifying operation.

The patent replaces the manual mechanical brushing action with an automated high-pressure gas-liquid jet system that generates cavitation. Instead of requiring operators to manually scrub surfaces with brushes, the system uses pressurized fluid dynamics and cavitation to automatically remove residues. This substitution maintains effective cleaning capability while eliminating the operational complexity and labor intensity of manual brushing.