Liquid Dispenser Optical Sensor for Refill Contamination Prevention
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Solution Overview
Problem
Liquid dispensing systems, such as those for soap and sanitizers, can become contaminated if the seal of the container is breached during refilling, leading to bacterial growth if not maintained properly.
Innovation Solution
A dispensing system equipped with a sensor that monitors the integrity of the container and a controller that generates output signals to prevent fluid dispensing if the container integrity is breached, ensuring sanitary conditions by preventing refilling through the detection of light transmission changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the container is made refillable to reduce waste and cost, then productivity and economy improve, but the risk of contamination and bacterial growth increases
Solution Approach 1:
The system performs preliminary detection of container integrity using optical sensors before dispensing fluid. The sensor detects breaches in the container seal in advance, preventing contaminated fluid from being dispensed. This preliminary action maintains the benefits of refillable containers while eliminating the contamination risk.
Solution Approach 2:
The system implements feedback control by continuously monitoring container integrity through optical sensors and using the sensor output to control the dispensing operation. When a breach is detected, the system automatically prevents dispensing, creating a closed-loop control system that maintains sanitary conditions while allowing refilling.
2Ease of operation
If the container seal is breached to refill with bulk liquid, then ease of operation improves, but the system becomes contaminated
Solution Approach 1:
The optical sensor provides real-time feedback on container seal integrity. The system allows refilling operations to proceed easily but automatically detects when the seal is breached and prevents dispensing of potentially contaminated fluid, thus maintaining reliability and sanitary conditions.
Solution Approach 2:
The optical sensor acts as an intermediary between the container and the dispensing system. It detects seal breaches without interfering with the refilling operation, allowing easy refilling while maintaining system reliability by preventing dispensing when contamination is detected.
3Reliability
If a sensor system is added to monitor container integrity, then reliability improves, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical seal detection mechanisms with optical sensors. The optical detection system uses light transmission properties to detect seal breaches, providing reliable monitoring with simpler, more reliable electronic components rather than complex mechanical switches or sensors.
Solution Approach 2:
The optical sensor serves as a simple intermediary that detects container integrity without requiring complex mechanical interaction with the container. The sensor system adds minimal complexity while providing reliable monitoring through non-contact optical detection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents contamination and bacterial growth by ensuring that fluid is only dispensed if the container is sealed, maintaining the system's sanitary condition and preventing unsanitary conditions from being notified to users and administrators.
Implementation Method 1
detection of light transmission changes
Data Source
AI summary
An exemplary dispensing system includes a dispenser, an actuator, a sensor, and a controller. The dispenser includes a container for holding liquid, a liquid pump, an air pump, an outlet nozzle, and a foaming media. The actuator causes the dispenser to dispense liquid or foam. The sensor generates an input signal indicative of a status of the container. The controller receives the input signal, generates at least one output signal, and prevents the dispenser from dispensing liquid or foam if a breach is detected in the container.