PRODUCT DISPENSING SYSTEM WITH PWM CONTROLLED SOLENOID PUMP

摘要

To provide a system for monitoring flow conditions of fluid flowing from a product container through a solenoid pump.SOLUTION: The system includes: at least one product container connected to at least one solenoid pump, the at least one solenoid pump pumping fluid from the at least one product container during each stroke; at least one PWM controller configured to energize the at least one solenoid pump; at least one current sensor for sensing the current flow through a solenoid coil and producing an output of the sensed current flow; and a control logic subsystem for controlling the flow of fluids through the solenoid pump by commanding the PWM controller and for monitoring the current through the solenoid pump by receiving the output from the current sensor. The control logic subsystem uses the measured current flow through the solenoid coil to determine whether the stroke of the solenoid pump is functional.SELECTED DRAWING: Figure 66