Thermoelectric Element Temperature Control via Current Return
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Solution Overview
Problem
Thermoelectric generating elements experience shortened lifespan due to continuous high temperature exposure, leading to characteristic deterioration, and existing solutions require complex mechanical structures to manage temperature, complicating the device.
Innovation Solution
A thermoelectric generating device with a temperature measuring unit and controller that increases current return to the element when the hot side temperature exceeds a predetermined level, using an opening/closing switch and voltage converting circuit to manage heat, thereby extending the element's lifespan through simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the thermoelectric generating element is physically kept away from the heat source to decrease temperature, then the element temperature is reduced below heat resistant temperature, but the device structure becomes complicated and large-sized
Solution Approach 1:
The patent replaces the mechanical structure (physical positioning system) with an electrical control system. The temperature controller monitors hot side temperature and automatically adjusts the opening/closing switch to control current return, substituting mechanical temperature management with electrical control. This eliminates the need for complex mechanical positioning structures while maintaining temperature below heat resistant limits.
Solution Approach 2:
The thermoelectric generating element utilizes its own Peltier effect capability to cool itself by controlling current return. Instead of external mechanical cooling systems, the element's inherent thermoelectric properties are leveraged through intelligent current control. The system serves itself by using the current flow that would otherwise be wasted to provide cooling when temperature exceeds thresholds.
2Temperature
If current return to the thermoelectric generating element is increased to cool the element, then the element temperature is reduced, but additional control components are required
Solution Approach 1:
The opening/closing switch serves dual functions: it controls current return for cooling purposes and can also function as part of the normal power generation circuit. The temperature controller integrates temperature monitoring and control logic, combining multiple functions into unified control components. This multi-functionality reduces the need for separate dedicated cooling components.
Solution Approach 2:
The temperature controller implements a feedback control system that continuously monitors the hot side temperature and automatically adjusts the opening/closing switch state. When temperature exceeds the heat resistant threshold, the controller activates current return; when temperature is adequate, it reduces or stops current return. This closed-loop feedback mechanism provides automatic temperature regulation without complex manual control systems.
3Power
If the load side is opened to maximize power output, then electric energy output is optimized, but the thermoelectric generating element temperature exceeds heat resistant temperature causing shortened lifespan
Solution Approach 1:
The system dynamically adjusts the operating state of the thermoelectric generating element based on real-time temperature conditions. The opening/closing switch transitions between open and closed states, and the temperature controller modulates current return dynamically. This dynamic control allows the system to operate at maximum power output when temperature is acceptable, and automatically switch to cooling mode when temperature approaches heat resistant limits, optimizing both power output and element lifespan throughout operation.
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 solution effectively prevents temperature from exceeding the heat-resistant limit, thereby extending the thermoelectric generating element's lifespan by actively controlling current return using a temperature controller and switch, maintaining efficient operation without additional mechanical complexity.
Implementation Method 1
a thermoelectric generating device which converts thermal energy to electric energy by a thermoelectric generating element using the Seebeck effect
Implementation Method 2
cooling of the thermoelectric generating element by the Peltier effect
Data Source
AI summary
A thermoelectric generating device includes: a thermoelectric generating element configured to convert thermal energy to electric energy and to output the electric energy; a temperature measuring unit configured to measure hot side temperature of the thermoelectric generating element; and a temperature controller configured to perform control to increase an amount of current returning to the thermoelectric generating element when the hot side temperature becomes higher than predetermined temperature.