Hot Water Boiler Temperature Control for Lower Heat Loss
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Solution Overview
Problem
Existing hot water tank temperature control systems result in significant heat losses as they operate at fixed maximum temperatures unless manually adjusted by the user, leading to inefficient energy usage.
Innovation Solution
An electronic control system that monitors user-set temperature changes over a defined period, automatically adjusting the temperature from a high setpoint to a lower, energy-efficient setpoint if no change is made, and providing a boost function for temporary higher temperatures, thus minimizing heat losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the hot water tank operates at a fixed maximum temperature (e.g., 85°C), then the water temperature is sufficient for all conventional hot water preparations, but significant heat losses occur leading to high energy consumption
Solution Approach 1:
The patent applies dynamics by making the temperature setpoint adjustable and time-dependent. The control system dynamically changes the maximum temperature between a first value (85°C) and a second value (60°C) based on operational conditions, transforming the static temperature control into a dynamic adaptation process that reduces heat losses while maintaining adequate water temperature for user needs
Solution Approach 2:
The patent implements parameter changes by modifying the temperature setpoint parameter over time. The control system changes the maximum temperature parameter from an initial high value to a lower energy-saving value after an observation period, and can temporarily increase it again via boost function, demonstrating parameter adaptation to balance between energy efficiency and user convenience
2Adaptability or versatility
If the user manually changes the temperature setting, then the temperature adapts to user preferences, but the device continues to operate at high temperature until changed, causing unnecessary energy consumption
Solution Approach 1:
The patent applies self-service by enabling the control system to automatically adjust the temperature setpoint without requiring continuous user intervention. The system autonomously monitors the observation period, detects lack of manual changes, and automatically switches to the lower energy-saving temperature, making the device self-regulating and eliminating the need for users to manually optimize energy consumption
Solution Approach 2:
The patent implements feedback by monitoring whether the user manually changes the temperature setting during the observation period. This feedback mechanism triggers the automatic temperature reduction when no manual adjustment is detected, creating a closed-loop control system that adapts to user behavior patterns and optimizes energy consumption based on actual usage
3Loss of energy
If the temperature is automatically reduced after an observation period, then energy-saving mode is activated, but the user may not be aware of the temperature change
Solution Approach 1:
The patent applies color changes by using a light-emitting diode (LED) that changes color or illumination state to indicate the current temperature mode. The LED provides visual feedback to the user about whether the device is operating at the high or low temperature setpoint, making the automatic temperature reduction transparent and preventing user confusion
4Ease of operation
If a boost function is added for temporary higher temperatures, then user convenience is improved, but the system complexity increases
Solution Approach 1:
The patent implements periodic action through the boost function that temporarily overrides the energy-saving temperature reduction. When activated, the system periodically maintains or increases the temperature for a defined period, providing temporary high-temperature capability on demand while returning to the lower setpoint afterward, balancing energy efficiency with user convenience needs
Data Source
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AI summary
The method involves predetermining the primary maximum set-point temperature (T-Soll-1), and monitoring whether a change of the maximum set-point temperature follows a secondary maximum set temperature (T-Soll-2) by the control electronics over a defined observation period (B). An independent claim is also included for a hot water tank comprises a temperature controller.