tempersure shower temperature control system 1 shower temperature control system tempero systems...
Post on 19-Dec-2015
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TemperSure Shower Temperature Control System1
Shower Temperature Control System Tempero SystemsStephen Au-Yeung
Francis MerinVictor Tai
Jason Wong
TemperSure Shower Temperature Control System2
Overview
• Problem• Vision• Features• TemperSure• Costs• System Components• Functional Deviation• Obstacles Encountered• Experiences• Outlook• Conclusion
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Problem
• Study done by Health Canada on pediatric hospital cases
Put into hot water,
12.30%
Accidental temperature
change, 32.40%
Other Cases, 55.30%
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Vision
• Existing solutions– Expensive
• Mission– Affordable– Safe
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Solution
• Our solution: The TemperSure System
• Goals: Attain and maintain water temperature
• Features– Automatic temperature adjustment– Temperature monitoring– Anti-scalding provisions– Simple user interface
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TemperSure
• Potential markets– Retirement homes– Hospitals– Hotels– Homes with small children or elderly
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Costs• Cost of major components
Solenoid Valve $130.00
Thermocouple $90.00
Motors $170.00
Valves $40.00
Motor Electronics $50.00
User Interface $50.00
Plumbing $60.00
Total $590.00
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System Components
User Interface
Temperature Controller
Anti-Scald Mechanism
Motorized Valves
Input/Output
Output
Sensors
Feedback
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Temperature Acquisition
• K-Type Thermocouple– Wide range of temperatures– Accuracy– Fast response time– Durable
• Direct contact with water flow
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Temperature Adjustment
• Custom fitted Motorized valves
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Temperature Adjustment
• Valves respond to temperature changes
• Firmware control– Limits temperature range to prevent
undesirable temperature changes
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User Interface
Decrease Temperature
Increase Temperature
Toggle Current Temperature
Blinking Display as activity indicator
Power Button
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Anti-Scalding
• Prevents water temperature over 45°C
• Solenoid on/off valve• Manual override
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Functional Deviation
• Non-independent anti-scald unit– Power restrictions
• User interface– Decreased functionality
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Obstacles Encountered
• Valve selection– Gate valve– Ball valve
• Valves: Water flow vs. valve position
• Plumbing
• Motor unit
• Sensors
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Experiences
• Water adds difficulty to project
• Try to keep to area of expertise
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Outlook
• Independent anti-scalding unit– Size reduction through PCB– Battery or self powered– Smaller solenoid valve size
• Improve control algorithms
• Precise flow control