Hot Water Recirculation Pump With Usage-Based Control
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Solution Overview
Problem
Continuous circulation of hot water in residential and commercial systems wastes energy due to heat loss and unnecessary pumping during periods of low usage, as existing systems maintain high temperatures even when no one is using the hot water.
Innovation Solution
A smart pump controlled by a microcontroller that logs hot water usage patterns and operates in pulse or automatic modes based on detected usage, reducing energy consumption by only circulating hot water during expected usage periods, using sensors to detect temperature changes and user-defined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot water is continuously circulated to ensure instant availability at taps, then hot water availability is improved, but energy consumption increases due to heat loss and unnecessary pumping
Solution Approach 1:
The patent implements periodic circulation by using a microcontroller to operate the pump in cycles rather than continuously. The system logs usage patterns and circulates water only during predicted usage periods, creating periodic on/off cycles that reduce energy consumption while maintaining hot water availability when needed.
Solution Approach 2:
The system uses sensors to detect temperature changes and usage patterns, feeding this information back to the microcontroller. The microcontroller analyzes this feedback data to predict future usage and adjust circulation timing, creating a closed-loop control system that optimizes energy usage based on actual system conditions.
2Productivity
If a pump operates in continuous pulse mode to circulate hot water, then hot water circulation is improved, but energy waste increases during periods of low usage
Solution Approach 1:
The system performs preliminary action by logging usage patterns during a base period and using this data to predict future usage. The microcontroller proactively circulates water before actual usage occurs based on these predictions, rather than reacting to immediate demand, thereby reducing the need for continuous circulation.
Solution Approach 2:
The patent makes the circulation system dynamic by allowing the pump operation schedule to adapt over time. The microcontroller continuously logs usage data and adjusts circulation timing based on changing patterns, transforming a static pulse mode into a dynamic, adaptive system that optimizes productivity while minimizing energy loss.
3Device complexity
If sensors and microcontroller are integrated within the water pump mechanism, then device complexity is reduced, but ease of manufacture may be affected
Solution Approach 1:
The patent merges the microcontroller and sensors directly into the water pump mechanism, creating an integrated smart pump unit. This consolidation reduces overall system complexity by eliminating separate control components and simplifies installation, while the modular design allows for standardized manufacturing of the integrated unit.
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 smart pump system significantly reduces energy waste by optimizing hot water circulation based on usage patterns, minimizing heat loss and energy consumption during periods of low demand, while ensuring instant hot water availability when needed.
Implementation Method 1
The smart pump comprises a water pump mechanism coupled to and controlled by a microcontroller which logs hot water usages based on signals received from one or more sensors that detect occurrences of hot water usage by detecting a temperature increase in the hot water system.
Data Source
AI summary
A water pump controlled by a microcontroller and operated to pump hot water for specific recirculation periods during a multi-day cycle. The recirculation periods are determined from hot water usage data logged by the microcontroller during a logging period occurring in the previous multi-day cycle. A preferred cycle is during a seven-day, or one-week, period.