Keyed Cartridge Nozzle Interface to Prevent Dispenser Clogging
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Solution Overview
Problem
Existing hygiene dispensers often experience clogging due to inappropriate or suboptimal refilled chemicals, leading to ineffective hand washing, as the pump becomes inoperable due to chemical or viscosity issues, resulting in workers not using the product properly.
Innovation Solution
A cartridge and dispenser system with a key-shaped nozzle and receptacle configuration ensures only compatible cartridges and dispensers engage, preventing improper refilling and ensuring proper fluid discharge, featuring radial raised fins and slots for unique keying, allowing for proprietary and quality-controlled dispensing of liquid or foam chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If maintenance personnel refill dispensers with available cleaning products at the site, then refilling flexibility is improved, but product compatibility and pump reliability deteriorate due to chemical or viscosity issues
Solution Approach 1:
The system segments the dispensing system into standardized components (dispenser body, cartridge, nozzle) with the nozzle serving as a unique identifier. This segmentation allows for modular replacement while maintaining system compatibility through the keying mechanism.
Solution Approach 2:
The system changes the physical parameters of the nozzle (shape, size, key configuration) to create unique identifiers that correspond to specific chemical product types. This parameter variation enables the dispenser to recognize and accept only compatible cartridges containing appropriate chemicals.
2Adaptability or versatility
If a single cleaning product is used across all industries and applications, then product availability is improved, but hygiene effectiveness deteriorates due to inappropriate product selection
Solution Approach 1:
The dispenser body and pump mechanism serve as universal components that can work with multiple different cartridge types. The universal interface allows one dispenser to serve multiple hygiene applications by accepting different keyed cartridges for different chemical products.
Solution Approach 2:
The system uses parameter changes in the nozzle configuration (different shapes, sizes, key patterns) to differentiate between various chemical product types. This allows a single dispenser design to support multiple products while ensuring the correct product is used for each specific hygiene application.
3Reliability
If cartridges are made unique and proprietary with key-shaped nozzles, then quality control is improved, but device complexity increases due to keying requirements
Solution Approach 1:
The system extracts the identification and compatibility verification function from the main dispenser body and concentrates it in the nozzle component. This extraction simplifies the overall system by placing the keying mechanism in a small, easily manufactured component rather than requiring complex verification systems in the entire dispenser.
Solution Approach 2:
The keying system creates a standardized interface where the nozzle key and receptacle opening are designed to be mutually compatible only for authorized pairings. This equipotential design ensures that quality control is maintained through simple mechanical compatibility rather than complex electronic or procedural verification.
Data Source
AI summary
A dispensing system for dispensing cleaning product for hand washing at a faucet comprises a cartridge having an internal reservoir for containing hand wash cleaning product, a nozzle configured in one of a plurality of key shapes, and a dispenser having a receptacle opening adapted to receive and engage the nozzle of the cartridge when the receptacle opening is configured in one of a plurality of key shapes corresponding to the key shape of the nozzle, the dispenser having a fluid communication passage for dispensing fluid for hand washing, whereby only cartridges and dispensers which have matched key shapes will engage each other for operative discharge of the hand wash cleaning product.