Induction Cooktop Sensor Positioning for Accurate Temperature Control
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Solution Overview
Problem
Conventional induction heating devices experience reduced heat responsiveness and temperature detection accuracy when an object is not positioned directly above the sensors, leading to inaccurate heating.
Innovation Solution
The induction heating device includes a top plate with a position indicator and sensors, where the position indicator is larger than the detectable area, and a judging unit that ensures the object is positioned directly above the sensor, allowing accurate temperature detection and heating control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor's detectable area is kept small to maintain detection precision, then temperature detection accuracy is improved, but the object positioning tolerance is reduced making it difficult to position the object directly above the sensor
Solution Approach 1:
The patent introduces a position indicator as an intermediary element between the sensor and the object. The position indicator has a larger area than the sensor's detectable area, serving as a visual guide to help users position the object correctly. This mediator allows users to easily identify the correct placement area without compromising the sensor's precise detection capability, as the sensor only activates when the object is properly positioned over its smaller detectable area within the indicator's boundaries
2Ease of operation
If the sensor's detectable area is enlarged to increase positioning tolerance, then ease of positioning is improved, but temperature detection accuracy is reduced
Solution Approach 1:
The patent segments the functional area into two distinct zones: the position indicator area and the sensor's detectable area. The position indicator provides a larger visual target area for easy positioning, while the sensor's detectable area remains smaller and concentrated at a specific location within the indicator. This segmentation allows the system to benefit from both a large positioning target and a precise detection point simultaneously
3Ease of operation
If the position indicator is made larger to improve positioning guidance, then ease of operation is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes visual indicators (such as color changes or light emission) to indicate the sensor's position and status. The position indicator can change color or illuminate to guide users on where to place the object, providing intuitive feedback without requiring complex mechanical or electronic positioning mechanisms. This approach maintains simplicity while significantly improving ease of operation
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 configuration ensures accurate positioning of the object above the sensors, enhancing temperature detection and heating precision, allowing the device to heat the object to a predetermined temperature effectively.
Implementation Method 1
heating coil 4 is for inductively heating object 2
Implementation Method 2
Heating coil 4 is for inductively heating object 2
Implementation Method 3
Sensors 5, thermal sensing elements, such as thermistors, are provided on a lower surface of top plate 3
Data Source
AI summary
An induction heating device includes a top plate arranged to have an object placed thereon, a heating coil provided under below the top plate for heating the object, a sensor provided under the top plate for detecting a temperature of the object, a judging unit for judging whether or not the object is positioned directly above the sensor, a controller operable to allow the heating coil to heat the object in response to the temperature detected by the sensor detecting, and a position indicator provided at the top plate for indicating a position of the sensor. The position indicator includes a detectable area of the sensor, and is larger than the detectable area. This induction heating device securely positions the object directly above the sensor and detects a temperature of the object accurately, hence heating the object accurately at a predetermined temperature.