Multi-Water Heater Control Using Variable Temperature Thresholds
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Solution Overview
Problem
Existing methods for controlling the parallel operation of multi-water heaters are inefficient due to fixed operation and stop reference values, which do not account for varying temperature differences between set and direct water temperatures, leading to suboptimal operation.
Innovation Solution
A method that measures the direct water temperature, calculates the temperature difference, and dynamically adjusts the operation and stop reference values to control the parallel operation of multi-water heaters, allowing for efficient operation by changing these values based on the calculated temperature difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed operation reference value and stop reference value are used, then control simplicity is maintained, but operation efficiency deteriorates under varying temperature conditions
Solution Approach 1:
The patent applies dynamics by making the operation reference value and stop reference value variable rather than fixed. The control unit dynamically adjusts these reference values based on the measured temperature difference between inlet water and direct water, allowing the system to adapt to varying operating conditions and maintain optimal efficiency across different scenarios
Solution Approach 2:
The patent implements parameter changes by modifying the operation reference value and stop reference value according to the temperature difference parameter. When the temperature difference increases, the operation reference value increases and the stop reference value decreases, enabling the system to respond appropriately to changing thermal conditions
2Duration of action of stationary object
If operation reference value is set high to avoid frequent operations, then device wear is reduced, but energy efficiency deteriorates when additional operation is needed
Solution Approach 1:
The patent applies feedback by continuously monitoring the temperature difference between inlet water and direct water, and using this information to adjust the operation reference value and stop reference value. This feedback mechanism ensures that the system operates efficiently by activating additional water heaters when the temperature difference indicates a need for increased heating capacity
Solution Approach 2:
The patent makes the operation reference value and stop reference value dynamic based on real-time temperature conditions. When temperature difference increases, the system adjusts these values to allow additional water heater operations, balancing device usage with energy efficiency requirements
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
This approach enhances the efficiency of multi-water heater operation by adjusting reference values according to changing conditions, ensuring optimal operation and energy usage based on the temperature difference between set and direct water temperatures.
Implementation Method 1
measuring the temperature of direct water that flows into the multi-water heater
Implementation Method 2
calculating a temperature difference between the set temperature and the direct water temperature
Data Source
AI summary
A method for controlling a parallel operation of a multi-water heater in which a plurality of water heaters are connected to each other in parallel, according to the present invention, comprises: measuring the temperature of direct water that flows into the multi-water heater; sensing a set temperature set by a user; calculating a temperature difference between the set temperature and the direct water temperature; and changing a reference value to additionally operate or stop each water heater according to the calculated temperature difference, thereby efficiently operate the multi-water heater even though the circumstance and conditions of use are changed.