Induction Cooker Temperature Sensor with Heat Transfer Member
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Solution Overview
Problem
Induction heating cookers lack effective temperature sensing mechanisms for working coils, leading to potential overheating and safety issues, as existing systems may not accurately measure temperature across multiple coils efficiently.
Innovation Solution
Incorporating a temperature sensor with a heat transfer member made of high thermal conductivity materials like copper, aluminum, or stainless steel, or heat pipes, which transfer heat from the working coils to the sensor, allowing for accurate temperature measurement and preventing overheating by cutting off power when excessive temperatures are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is provided for each working coil to accurately measure temperature, then temperature measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The sensing unit is divided into multiple sensing zones (first, second, third sensing zones) that correspond to different working coil areas. Each sensing zone independently measures temperature in its respective region, enabling precise temperature monitoring across multiple coils while using a single integrated sensor structure rather than multiple separate sensors.
Solution Approach 2:
A single temperature sensor structure serves multiple functions by measuring temperatures of multiple working coils simultaneously through its multiple sensing zones. This multi-functional design eliminates the need for separate temperature sensors for each working coil, reducing device complexity while maintaining measurement precision.
2Measurement precision
If heat transfer members are added to improve heat transfer efficiency to the sensor, then temperature sensing accuracy is improved, but device complexity increases
Solution Approach 1:
The heat transfer members are integrated with the sensing unit structure, forming a unified component rather than separate additions. The sensing unit and heat transfer members work as a combined system, allowing efficient heat transfer from working coils to the sensor element while maintaining a compact and simple overall device structure.
3Area of stationary object
If multiple temperature sensors are distributed throughout the cooking plate to monitor all working coils, then temperature monitoring coverage is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The sensing unit is segmented into multiple sensing zones that collectively cover the entire cooking plate area. Each sensing zone corresponds to a specific region where working coils are located, ensuring comprehensive temperature monitoring coverage across all cooking zones without requiring multiple separate sensor units.
Solution Approach 2:
A single multi-functional temperature sensor structure with multiple sensing zones replaces the need for multiple distributed temperature sensors. This universal sensor design provides comprehensive temperature monitoring coverage across the entire cooking plate while simplifying manufacturing and reducing component count.
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 solution enables precise temperature monitoring, prevents overheating, and improves safety by ensuring the induction heating cooker operates within safe temperature limits, enhancing productivity and space utilization with reduced sensor count and improved reliability.
Implementation Method 1
a heat transfer member to transfer heat from the working coil to the temperature sensor
Implementation Method 2
a heat pipe including a hermetically sealed pipe filled with a predetermined amount of an operating fluid phase of which is variable
Implementation Method 3
supplies high-frequency current to a heating coil to generate a strong high-frequency magnetic field in the heating coil and to generate an eddy current in an object to be heated, magnetically coupled to the heating coil
Implementation Method 4
the object is heated using Joule's heat generated by the eddy current
Data Source
AI summary
An induction heating cooker including a temperature sensor disposed between a plurality of working coils which are uniformly disposed below a cooking table and a heat transfer member to transfer heat from the working coils adjacent to the temperature sensor to the temperature sensor, thereby improving productivity and space utilization.