An induction heating cooker
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Solution Overview
Problem
Traditional induction heating cookers lack precise temperature control, leading to uncontrollable temperature changes during cooking, which can result in overcooked or undercooked food, and existing sensor technologies face challenges such as reflection interference, sensitivity loss, and safety hazards due to dirt accumulation and indirect heat transfer.
Innovation Solution
An induction heating cooker design featuring a cooker glass with a plate and coil configuration, incorporating a temperature sensor housed in a holder with a filtering member that matches the optical characteristics of the cooker glass to eliminate reflections and allow precise temperature measurement of the cooking vessel, while maintaining a wide dynamic range and enabling spot measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is placed on the cooker glass to measure the cooking vessel temperature, then temperature measurement capability is provided, but reflection interference from the cooker glass prevents accurate measurement
Solution Approach 1:
A filtering member with optical characteristics matching the cooker glass is introduced as an intermediary between the sensor and the cooking vessel. This filtering member has the same refractive index and optical properties as the cooker glass, allowing it to match the optical path and eliminate reflection interference at the interfaces, thereby enabling accurate temperature measurement through the cooker glass.
2Measurement precision
If the sensor is positioned close to the cooking vessel for direct measurement, then measurement sensitivity is improved, but the sensor is exposed to high temperatures and direct heat transfer
Solution Approach 1:
The filtering member serves as a thermal barrier while maintaining optical transparency. It allows infrared radiation from the cooking vessel to pass through to the sensor while providing thermal isolation that protects the sensor from direct heat transfer and high temperature exposure, enabling the sensor to operate in a cooler environment.
3Ease of operation
If the sensor measures temperature through the cooker glass, then non-contact measurement is achieved, but indirect heat transfer causes the glass to heat up and interfere with measurement
Solution Approach 1:
The filtering member is designed with specific optical parameters (refractive index, transmission characteristics) that match the cooker glass. By changing the optical parameters of the filtering member to match the glass, the system maintains non-contact measurement capability while eliminating the measurement interference caused by the glass heating up during indirect heat transfer.
4Measurement precision
If a filtering member with matching optical characteristics is introduced to eliminate reflections, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The filtering member is designed with homogeneous optical characteristics that match the cooker glass material. By using a filtering member with the same or similar optical properties (refractive index, transmission spectrum) as the cooker glass, the system achieves reflection elimination through optical matching rather than complex multi-layer coatings or additional optical components.
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 design enables accurate and precise temperature control of the cooking vessel, preventing food from burning or being undercooked, while minimizing environmental temperature interference and maintaining user safety and comfort.
Implementation Method 1
at least one filtering member (8) which has the same or similar permeability (optical characteristics) as the cooker glass (2)... By means of the placement of said filtering member (8), which has the same or similar permeability (optical characteristics) as the cooker glass (2), in front of the temperature sensor (6), the filtering member (8) heats up equally with the cooker glass (2), thus eliminating the radiation coming from the cooker glass (2)
Implementation Method 2
at least one coil which is placed on a plate and which provides the heating of the cooking vessel
Implementation Method 3
at least one coil which is placed on a plate and which provides the heating of the cooking vessel
Implementation Method 4
at least one temperature sensor which detects the temperature of the cooking vessel
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to an induction heating cooker (1) comprising a cooker glass (2) whereon the cooking vessel is placed; at least one plate (4) which is positioned under the cooker glass (2); at least one coil (3) which is placed on a plate (4) and which provides the heating of the cooking vessel; at least one temperature sensor (6) which detects the temperature of the cooking vessel; a holder (7) which has at least one housing (7.2) on a base surface (7.1) thereof wherein the at least one temperature sensor (6) can be placed and which is joined with the plate (4) by means of a connection member; and at least one filtering member (8) which is positioned at the top of the temperature sensor (6) to cover the at least one temperature sensor (6).