Fluid Mixing Assembly Pressure Control for Trace Dilution

The patent employs a pressure control mechanism where a pump applies pressure to the chemical stock solution reservoir, forcing the high-concentration solution through a mixing assembly that incorporates deionized water. By controlling the pressure and flow rates, the system achieves precise dilution to trace concentrations (ppm level) without requiring excessive deionized water, as the pressure-driven flow enables accurate metering of both stock solution and diluent.

The system changes the operating parameters by using pressure control instead of volumetric mixing. The pump pressure and flow rate parameters are adjusted to achieve the desired concentration ratio, allowing precise dilution while minimizing deionized water consumption. The pressure parameter enables dynamic control of the mixing ratio to achieve trace concentrations efficiently.

The system transitions from static batch preparation to dynamic continuous mixing. The pressure-controlled pump and mixing assembly enable real-time adjustment of flow rates and mixing ratios, allowing the system to maintain stable concentration dynamically over time. This dynamic control prevents concentration drift that occurs in static batch preparations, ensuring consistent trace concentration even during extended operation.

The pressure control mechanism provides feedback control for concentration stability. By monitoring the pressure required to maintain the desired flow rate through the mixing assembly, the system can detect and compensate for changes in solution properties or flow conditions, thereby maintaining stable concentration over time. The pressure feedback enables automatic adjustment to preserve concentration consistency.