Microfluidic Chip Gas Jetting for Particle Sorting

The patent applies pneumatic pressure through a gas introduction channel to control the movement direction of micro-particles. By introducing gas at controlled positions and timings, the system achieves accurate directional control without requiring strong active forces that would damage the particles. The gas pressure creates flow patterns that guide particles along desired paths while maintaining their structural integrity.

The patent implements local quality by introducing gas at specific localized positions within the channel rather than uniformly throughout. The gas introduction channel is positioned to create flow modifications only in the downstream region where particle redirection is needed. This localized approach achieves sorting functionality without disturbing the upstream flow conditions, thereby maintaining analysis accuracy.

The patent replaces complex electric or magnetic field systems with a simpler pneumatic system. By using a gas introduction channel connected to a gas source, the system achieves sorting capability through pressure-driven flow control. This pneumatic approach significantly simplifies the device configuration compared to electromagnetic systems, while maintaining effective sorting functionality.

The patent creates a controlled liquid-phase environment within the microfluidic channel to replace the atmospheric air setting. By maintaining particles suspended in liquid throughout the sorting process and only exposing them to gas briefly at the collection stage, the system achieves fast sorting speeds while preventing aerosol generation. The liquid environment contains particles securely, eliminating contamination and bio-hazard risks associated with aerosolization.