Peltier Element Temperature Control Using Electrical State Feedback
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Solution Overview
Problem
Conventional temperature adjustment apparatuses using Peltier elements do not consider the electrical state, leading to potential deterioration or failure when operating at maximum standard values, limiting the temperature adjustment capability.
Innovation Solution
A temperature adjustment apparatus with a drive circuit, state detector, and control circuit that calculates a desired output based on the electrical state of the Peltier element, allowing for feedback control to manage DC voltage, direct current, and electromotive force, preventing deterioration and enabling operation up to maximum standard values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If temperature control is performed using maximum standard values of the Peltier element, then temperature adjustment capability is improved, but the Peltier element may suffer from performance deterioration or failure
Solution Approach 1:
The patent implements feedback control by detecting the electrical state (current, voltage, power consumption) of the Peltier element and adjusting the driving conditions accordingly. The control circuit monitors these parameters in real-time and modifies the driving current or voltage to prevent exceeding safe operating limits, thereby maintaining both high temperature adjustment capability and element reliability through continuous feedback adjustment
Solution Approach 2:
The patent dynamically changes operating parameters (driving current, voltage, power consumption levels) based on the detected electrical state of the Peltier element. By adjusting these parameters in real-time according to the element's actual condition, the system optimizes temperature adjustment capability while preventing performance deterioration or failure through parameter adaptation
2Reliability
If standard values are set lower than maximum standard values to prevent Peltier element failure, then reliability is improved, but temperature adjustment capability is reduced
Solution Approach 1:
The patent transitions from static standard value settings to dynamic parameter adjustment based on real-time detection of the Peltier element's electrical state. The system continuously adapts driving current, voltage, and power levels according to the element's actual condition, enabling both high reliability and maximum temperature adjustment capability through dynamic optimization rather than fixed conservative limits
3Reliability
If electrical state detection and feedback control are implemented, then Peltier element protection is improved, but device complexity increases
Solution Approach 1:
The control circuit is designed to perform multiple functions: it detects the electrical state (current, voltage, power), processes this information, and adjusts driving parameters to prevent element failure. By integrating these multiple functions into a single multi-functional control unit, the patent achieves comprehensive Peltier element protection without proportionally increasing overall device complexity
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
Enhances temperature adjustment capability by preventing performance deterioration and failure, allowing for maximum heating and cooling capacity utilization while ensuring safe operation of the Peltier element.
Implementation Method 1
a temperature adjustment apparatus for adjusting the temperature of a control object using a Peltier element
Data Source
AI summary
A drive circuit of a temperature adjustment apparatus drives a Peltier element at a desired output amount. A state detector detects an electrical state of the Peltier element. A control circuit calculates a desired output amount based at least on the electrical state of the Peltier element, determines a control quantity for driving the Peltier element at the desired output amount, and controls the drive circuit at the control quantity.