Foaming soap dispenser
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Solution Overview
Problem
Existing foaming soap dispensers require manual contact to operate, which can be unhygienic and inconvenient, and struggle to consistently control the foam consistency and dispensing volume.
Innovation Solution
A contactless foaming soap dispenser using a diaphragm air pump and peristaltic soap pump with a sensor-activated system, allowing for adjustable air-to-soap ratio control via motor speed, integrated in a compact working block with a foaming device and controller, enabling variable foam consistency and dispensing amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual contact operation is used, then the device is simple to operate, but it is unhygienic and inconvenient
Solution Approach 1:
The patent replaces manual mechanical contact operation with a sensor-based detection system. The sensor device detects the presence of a hand or object near the dispensing opening and triggers automatic pump operation, eliminating the need for physical contact with buttons or actuators while maintaining ease of use.
Solution Approach 2:
The dispenser system automatically detects user needs through the sensor and initiates the dispensing process without requiring manual activation. The controller automatically coordinates the operation of air pump and soap pump based on sensor input, making the system self-activating and hygienic.
2Manufacturing precision
If separate pumps for air and soap are used, then foam consistency can be controlled, but the device complexity increases
Solution Approach 1:
The patent combines the air pump and soap pump into a coordinated dual-pump system controlled by a single controller. Both pumps are integrated within the housing and operate simultaneously or sequentially based on controller logic, allowing precise control of foam consistency while managing system complexity through unified control architecture.
Solution Approach 2:
The controller adjusts the operational parameters of both pumps (speed, duration, sequence) to control the air-to-soap ratio and achieve desired foam consistency. By dynamically changing pump operation parameters rather than using fixed mechanisms, the system achieves precise foam control without excessive mechanical complexity.
3Adaptability or versatility
If pump speed is adjusted for different foam consistency, then dispensing flexibility improves, but control precision requirements increase
Solution Approach 1:
The patent employs variable speed motors for the pumps that can dynamically adjust their rotation speed based on controller commands. This allows the system to adapt pump delivery rates in real-time to produce different foam consistencies (thinner or thicker foam) by simply changing motor speed parameters, providing versatility without complex mechanical adjustments.
Solution Approach 2:
The controller monitors and coordinates the operation of both pumps, potentially using feedback mechanisms to maintain precise speed control and air-to-soap ratio. By implementing controlled feedback loops, the system achieves accurate foam consistency control even when adjusting pump speeds for different dispensing requirements.
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
Enables hygienic, hands-free operation with adjustable foam consistency and volume, ensuring consistent dispensing regardless of soiling levels, and allowing for easy exchange of foaming devices and settings.
Implementation Method 1
a peristaltic metering pump for supplying soap
Implementation Method 2
a diaphragm air pump for supplying foaming air
Implementation Method 3
a foaming device in vicinity of the dispensing opening
Data Source
AI summary
A foaming soap dispenser includes a housing having a discharge opening at the bottom, a receptacle in which a liquid soap reservoir can be replaceably inserted and a soap container beneath the reservoir. A peristaltic or squeezed-tube pump for the soap and a diaphragm pump for feeding foaming air to a foaming device disposed close to the discharge opening, can be driven separately electrically.