Electric Range Coil Temperature Sensor for Extended Operation Time
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Solution Overview
Problem
Conventional induction heating type electric ranges fail to accurately monitor the temperature of the working coil, leading to potential overheating and premature power cutoff, resulting in reduced operation time and compromised product reliability.
Innovation Solution
Incorporating a dedicated coil temperature sensor that directly measures the working coil's temperature in real-time, allowing for active response to load conditions and preventing overheating, while simplifying the installation structure to reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is used to indirectly measure the temperature of the heating target or cover plate, then the structure is simple and manufacturing cost is low, but the working coil temperature cannot be accurately monitored leading to premature power cutoff
Solution Approach 1:
A dedicated coil temperature sensor is introduced as an intermediary device that directly contacts the working coil to accurately measure its temperature. This sensor acts as a mediator between the working coil and the control system, providing precise temperature feedback without requiring complex indirect measurement systems.
Solution Approach 2:
The patent replaces the indirect thermal conduction-based temperature sensing method with a direct contact-based measurement approach. By substituting the mechanical/thermal field measurement (indirect sensing through cover plate) with a direct electrical contact measurement (sensor contacting working coil), accurate real-time temperature monitoring is achieved.
2Reliability
If the working coil is used for a long time under no load or low load conditions, then the electric range maintains operational readiness, but the working coil temperature gradually rises causing overload and power supply cutoff
Solution Approach 1:
The coil temperature sensor provides continuous real-time feedback on the working coil temperature to the control system. This feedback mechanism enables the system to monitor temperature trends and adjust power supply accordingly, preventing temperature-induced overload and ensuring reliable continuous operation.
Solution Approach 2:
The temperature sensor detects gradual temperature rise in the working coil before it reaches dangerous overload levels. By taking preliminary detection action, the system can proactively manage the working coil temperature and prevent premature power cutoff, maintaining operational readiness.
3Duration of action of moving object
If a dedicated coil temperature sensor is added to directly measure working coil temperature, then real-time temperature monitoring and operation time extension are achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The coil temperature sensor serves multiple functions: it monitors working coil temperature, prevents overload conditions, extends operation time, and provides data for control system optimization. By making the sensor multi-functional, the added complexity is justified by multiple benefits rather than a single function.
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 significantly extends the operation time of the electric range, enhances user convenience by preventing unexpected interruptions, and improves product reliability by accurately monitoring the working coil's temperature, thus avoiding overheating issues.
Implementation Method 1
An induction heating type may apply high-frequency power to a coil and generate a magnetic field around the coil, and may heat a heating target made of a metal material by using an eddy current generated in the magnetic field.
Implementation Method 2
apply high-frequency power to a coil and generate a magnetic field around the coil
Implementation Method 3
a coil temperature sensor disposed in the heating portion and configured to sense the temperature of the working coil
Data Source
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AI summary
There disclosed an electric range including a dedicated coil temperature sensor configured to measure the temperature of a working coil so as to monitor the working coil temperature in real time and actively respond to the working coil load condition, thereby remarkably increasing an operation time of the electric range.