Functional Principles

The ACM uses a compact four-part cleaning subsystem—Right Pipe (water inlet), Solenoid Valve, Left Pipe, and Cleaning Nozzle—mounted on a partition directly beneath the Common Tank for straightforward integration and maintenance. At point A, the user connects an external tap line to the Right Pipe, which accepts a 15 mm OD hose and feeds water to the valve stage. The Adafruit 996 solenoid valve, driven via a relay under microcontroller control, switches flow automatically; it can operate without inlet head, with 0.6–2 bar recommended for effective wash coverage. When actuated, water passes through the Left Pipe to the Cleaning Nozzle located inside the Common Tank, delivering a 360° spray for thorough internal rinsing.

The base panel includes large square apertures to allow the dispenser to be docked. Because spray could splash toward the central compartment that houses servomotors, the design incorporates rubber mats/splash barriers to prevent ingress and reduce short-circuit risk. After each cycle, effluent drains to the Grill, which is easily removable for quick disposal and cleaning. Overall, the subsystem provides an efficient, user-friendly CIP routine while protecting sensitive electromechanical components.