Hand Cleaning Sequence Control for Verified Wash Completion
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Solution Overview
Problem
Existing hand cleaning systems in hospitals and food processing plants lack the ability to ensure users properly complete hand washing procedures and fail to manage energy consumption effectively, leading to potential contamination and resource wastage.
Innovation Solution
A hand cleaning system comprising four cleaning devices (soap dispenser, water faucet, hand dryer, and disinfectant liquid dispenser) with a sensing device and control device that uses identification tags, activation signals, and procedure control data to enforce minimum usage times and manage energy consumption, ensuring proper hand washing and optimizing resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cleaning devices are provided on a same apparatus, then cleaning capability is improved, but the ability to determine whether all cleaning processes have been performed deteriorates
Solution Approach 1:
The control device receives activation signals from detection units of each cleaning device, times the generation time of activation signals, and compares it against minimum usage time conditions to determine whether cleaning processes have been properly completed. This feedback mechanism ensures reliable verification of cleaning process completion across multiple cleaning devices.
2Loss of information
If users are required to undergo identity verification and usage conditions are recorded, then cleaning process monitoring is improved, but the ability to enforce proper cleaning execution deteriorates
Solution Approach 1:
The control device is pre-configured with procedure control data including minimum usage time conditions for each cleaning device. Before the cleaning process begins, the system establishes enforcement criteria that will automatically prevent completion until proper cleaning execution is verified, thus ensuring cleaning execution enforcement rather than just monitoring.
Solution Approach 2:
The system continuously monitors activation signals from detection units and provides real-time feedback by comparing actual usage time against minimum usage time conditions. This feedback loop ensures that proper cleaning execution is enforced rather than merely recorded, as the system can identify and report non-compliance.
3Ease of operation
If cleaning devices are activated independently, then operational flexibility is improved, but energy consumption management deteriorates
Solution Approach 1:
The control device receives activation signals from detection units, times the generation time of these signals, and compares it against minimum usage time conditions. This feedback mechanism enables energy consumption management by ensuring cleaning devices operate for appropriate durations, preventing both premature shutdown and excessive operation.
Solution Approach 2:
The system changes the operational parameters of cleaning devices by enforcing minimum usage time conditions. The control device adjusts the operation duration of each cleaning device based on pre-set minimum usage time conditions, optimizing energy consumption while maintaining cleaning effectiveness.
Data Source
AI summary
A hand cleaning system includes four cleaning devices, a sensing device and a control device. Cleaning services respectively provided by the four cleaning devices are different. The control device controls each of the cleaning devices and the sensing device. The control device is set with procedure control data, which causes the control device to sequentially activate the cleaning devices when read. The control device has a first operation mode in which each of the cleaning devices can be independently activated, and a second operation mode in which the procedure control data is read upon acquiring a procedure activation signal to temporarily control the cleaning devices to operate. The control device in the second operation mode determines whether a usage time of each of the cleaning devices satisfies a minimum usage time condition to accordingly demand a user to properly perform hand cleaning.