Thermoelectric Temperature Control with Adaptive Voltage Switching
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Solution Overview
Problem
Existing temperature control systems using thermoelectric modules face inefficiencies due to high switching losses and power wastage, especially when controlling temperature near the target value, leading to increased noise and energy consumption.
Innovation Solution
An electronic temperature control apparatus that adjusts voltage supply to the thermoelectric module based on the temperature difference between the object and the target temperature, switching to constant voltage for rapid cooling/heating when the difference is significant and variable voltage for maintenance within a pre-set range, reducing switching operations and energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switching control is used for temperature control, then temperature control capability is improved, but switching losses and power wastage increase
Solution Approach 1:
The patent changes the voltage parameter dynamically based on temperature conditions. When the temperature difference is large, constant voltage is applied for rapid response. When the temperature difference is small, variable voltage is applied to reduce switching losses. This parameter change resolves the contradiction by adapting the voltage mode to the specific temperature control stage.
Solution Approach 2:
The control system transitions from static switching control to dynamic voltage control. The controller adjusts the voltage supply mode in real-time based on the temperature difference between the object and target temperature, making the system adaptive and reducing unnecessary switching operations that cause energy loss.
2Measurement precision
If frequent switching operations are performed for precise temperature control, then temperature precision is improved, but noise and energy consumption increase
Solution Approach 1:
The patent implements parameter change by switching between constant voltage mode and variable voltage mode based on temperature difference thresholds. This reduces the frequency of switching operations while maintaining temperature precision, thereby lowering noise generated by frequent switching.
3Speed
If constant voltage is supplied for rapid temperature change, then temperature response speed is improved, but energy consumption increases
Solution Approach 1:
The system dynamically selects between constant voltage mode (for rapid response when temperature difference is large) and variable voltage mode (for energy-efficient maintenance when temperature difference is small). This dynamic adaptation resolves the contradiction by using high-energy mode only when necessary for speed.
Solution Approach 2:
The patent applies constant voltage (excessive action) only partially - specifically when the temperature difference exceeds a predetermined threshold. When the temperature is close to the target, variable voltage (precise action) is used instead, optimizing the balance between response speed and energy consumption.
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 minimizes power consumption and noise by optimizing voltage supply, reducing switching losses, and maintaining temperature control with reduced energy expenditure and noise generation.
Implementation Method 1
A thermoelectric module uses the fact that heat is transferred from a low temperature region to a high temperature region due to the Peltier effect when a current flows to a circuit including a junction between different materials.
Implementation Method 2
when heat is transferred from a high temperature part to a low temperature part due to a temperature difference therebetween
Data Source
Figure 1(a)~1(c)
Figure 2~3
Figure 4~5
AI summary
An electronic temperature control apparatus a cooler using the same, a heater using the same, and a control method thereof are provided. The electronic temperature control apparatus includes: a thermoelectric module including a first metal member having one end in contact with an object and a second metal member having one end joined with the other end of the first metal member, a voltage applied to one end of the first metal member and the other end of the second metal member; a voltage supply unit supplying a first voltage or a variable voltage having a range from a second voltage to a third voltage to the thermoelectric module; and a controller controlling a voltage supplied to the thermoelectric module by the voltage supply unit according to a difference between a temperature of the object or the first metal member and a target temperature.