Pump Actuator Reset Control for Stalled Fluid Dispensers
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Solution Overview
Problem
Electronically keyed fluid dispensing systems often experience pump stalling due to improper installation of refill containers, leading to potential damage and excess fluid dispensing, with existing manual reset methods being unreliable and potentially damaging.
Innovation Solution
A method for automatically resetting a stalled pump by determining if a refill container is removed, moving the pump actuator to a loading position, and using a timer to ensure proper reinstallation, along with an electronic keying mechanism to automatically return the pump actuator to the loading position when a stall condition is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual reset methods are used to address pump stalling, then the pump can be reset, but the method is unreliable and may further damage the system
Solution Approach 1:
The system automatically detects pump stalling conditions and executes reset procedures without requiring manual user intervention. The controller monitors pump operation, identifies stall conditions through sensors, and autonomously initiates the reset sequence by actuating the pump actuator, thereby eliminating the unreliability and potential damage associated with manual reset methods.
Solution Approach 2:
The patent replaces manual mechanical reset operations with an automated electronic control system. The controller uses electronic sensors to detect stall conditions and commands an actuator mechanism to perform the reset, substituting the unreliable manual mechanical process with a precise, controlled electronic-mechanical system that reduces the risk of further damage.
2Extent of automation
If the pump actuator is not automatically reset, then manual intervention is required, but this increases the risk of excess fluid dispensing and system damage
Solution Approach 1:
The system incorporates sensors that continuously monitor pump operation and provide feedback to the controller. When a stall condition is detected, the feedback mechanism triggers the controller to automatically initiate the reset sequence, ensuring timely intervention that prevents excess fluid dispensing and eliminates the need for manual monitoring and intervention.
Solution Approach 2:
The pump actuator system performs self-resetting through automated detection and actuation. The controller monitors pump status, identifies stall conditions, and autonomously commands the actuator to reset the pump, creating a self-correcting system that prevents harmful outcomes without external intervention.
3Reliability
If the pump actuator remains in the dispensing position during a stall, then the pump continues to operate, but this causes excess fluid dispensing and potential damage
Solution Approach 1:
Sensors provide real-time feedback on pump actuator position and operation status to the controller. When a stall condition is detected or the actuator fails to return to the loading position, the feedback mechanism triggers an automatic reset sequence that moves the actuator back to the loading position, preventing excess fluid dispensing and maintaining operational reliability.
Solution Approach 2:
The system takes preliminary action by automatically detecting stall conditions and initiating the reset sequence before excess fluid dispensing occurs. The controller proactively commands the actuator to return to the loading position, preventing the harmful outcome of continued pump operation and fluid loss.
Data Source
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AI summary
Various methods are disclosed for resetting a stalled pump in a fluid dispensing system. In one embodiment, it is determined whether a refill container is received in the dispensing system and then a pump actuator is moved to a loading position when the refill container is removed. Another method sets a run timer, starts a pump actuator, determines whether the pump actuator is still dispensing fluid from the fluid dispensing system upon lapsing of the run timer and then moves the pump actuator if the pump actuator is still dispensing upon the expiration of the run timer. And another method detects opening of a cover, energizes a motor to move an actuator to a loading position, determines when the actuator is at the loading position and then turns the motor off.