Sensor-Activated Towel Dispenser Dryer With Segmented Airflow
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Solution Overview
Problem
Towel dispensers in public bathrooms often require multiple paper towel usage, and hand dryers frequently fail to completely dry users' hands due to inefficient air distribution.
Innovation Solution
A combined dryer and towel dispenser system with a sensor-activated air dryer and towel dispenser, where the dryer blows air through ducts with outlets positioned to dry hands efficiently while the user retrieves a towel, and includes features like temperature monitoring and mode selection to prevent overheating and optimize usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a hand dryer is used to dry hands, then drying speed is improved, but the dryer often does not completely dry the user's hands due to inefficient air distribution
Solution Approach 1:
The air outlet is divided into multiple segments (first air outlet and second air outlet) positioned at different locations and orientations. The first air outlet discharges air in a first direction while the second air outlet discharges air in a second direction substantially opposite to the first direction, creating segmented air flows that collectively cover the entire hand drying area more effectively than a single outlet.
Solution Approach 2:
Different portions of the air outlet structure provide different air discharge characteristics. The first and second air outlets are positioned at different locations with different discharge directions, creating localized optimized air flows tailored to specific areas of the hand drying zone, ensuring complete coverage across the entire area.
2Ease of operation
If multiple paper towels are used from the towel dispenser, then hand drying is achieved, but paper towel consumption increases
Solution Approach 1:
The hand dryer and towel dispenser are combined into a single integrated unit with shared housing and coordinated operation. The sensor-activated dryer works in conjunction with the towel dispenser, allowing users to partially dry hands with air before using towels, thereby reducing overall paper towel consumption while maintaining effective hand drying.
Solution Approach 2:
The hand dryer provides preliminary hand drying action before the user uses paper towels. By activating the dryer first to remove excess moisture, the subsequent towel usage requires fewer towels to achieve complete drying, thus reducing paper towel consumption.
3Reliability
If the dryer blows air continuously to ensure complete drying, then drying effectiveness is improved, but energy consumption and overheating risk increase
Solution Approach 1:
The hand dryer operates periodically rather than continuously. The sensor detects when a user approaches and activates the dryer for a predetermined time period, then shuts off automatically. This periodic operation maintains drying effectiveness while significantly reducing energy consumption and preventing overheating compared to continuous operation.
Solution Approach 2:
The sensor provides feedback about user presence to control dryer operation. When the sensor detects a user within the sensing area, it triggers the dryer to operate; when the user leaves the sensing area or the predetermined time elapses, the dryer shuts off. This feedback-based control ensures the dryer operates only when needed, optimizing energy efficiency.
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
The system reduces paper towel usage and ensures effective hand drying by synchronizing towel dispensing with air drying, meeting accessibility standards and preventing overheating, thus enhancing user convenience and hygiene.
Implementation Method 1
a sensor having a sensing area for sensing an object that penetrates the sensing area
Implementation Method 2
a dryer activated in response to a sensing of the object for drying the object
Data Source
AI summary
A dryer and towel dispenser combination and method of operating the same. The combination includes a towel dispenser for dispensing a towel through a first area, a sensor having a sensing area for sensing an object that penetrates the sensing area. The dryer is activated in response to a sensing of the object for drying the object.