Cooking Sensor Shielding Against Induction Interference
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Solution Overview
Problem
Cooking sensors attached to induction cooking appliances are adversely affected by the inductive alternating magnetic field, leading to inaccurate temperature measurements due to heating and interference, especially when positioned close to the bottom of cookware.
Innovation Solution
A removable cooking sensor with a metallic shielding and a data transmission device that uses radio waves, where the shielding is designed to prevent induction radiation from entering while allowing radio signals to pass through, enabling precise temperature measurement near induction cooking surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the cooking sensor is attached close to the bottom of the cookware, then the temperature measurement precision is improved, but the sensor is adversely affected by the inductive alternating magnetic field
Solution Approach 1:
A metallic shielding element is introduced as an intermediary component between the induction field source and the cooking sensor. This shielding element acts as a mediator that blocks the harmful inductive alternating magnetic field while allowing the sensor to remain in the optimal position for accurate temperature measurement.
Solution Approach 2:
The shielding element is strategically positioned only in the region where the cooking sensor is located, providing localized protection against the induction field. This allows the sensor to be attached close to the cookware bottom for precise measurement without subjecting the entire sensor assembly to uniform shielding, optimizing both measurement accuracy and field protection.
2Measurement precision
If the cooking sensor is attached close to the bottom of the cookware, then the temperature measurement precision is improved, but the sensor heating is increased
Solution Approach 1:
The metallic shielding element serves as a thermal barrier that mediates between the hot cookware bottom and the cooking sensor. It blocks excessive heat transfer to the sensor while allowing the sensor to maintain close proximity to the cookware for accurate temperature measurement of the cooking environment.
3Object-affected harmful factors
If a metallic shielding is added to protect the sensor, then the shielding effectiveness is improved, but the device complexity is increased
Solution Approach 1:
The shielding function is extracted as a separate, removable component rather than being integrated into the main sensor housing. This allows the shielding element to be added only when needed for induction cooking applications, keeping the basic sensor design simple while providing enhanced protection when required.
Solution Approach 2:
The shielding element is designed to cover only the critical areas where the cooking sensor is positioned, rather than enclosing the entire sensor assembly. This localized shielding approach provides effective protection against induction field penetration while minimizing the added structural complexity and material usage.
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 effectively shields the cooking sensor from induction radiation, allowing it to be attached close to induction cooking surfaces without interference, providing accurate temperature measurements and secure data transmission, even in hot environments.
Implementation Method 1
a metallic shielding (3) is present on the cover (4), the metallic shielding (3) being designed to prevent induction radiation from laterally entering the cooking sensor (1)
Implementation Method 2
the cooking utensil temperature sensor is an IR sensor
Data Source
Figure 1
Figure 2
AI summary
A detachable cooking sensor (1) has a housing (2, 4) with a base (2) and a detachable lid (4), wherein the base (2) is designed for mounting on a wall of a cookware unit and the base (2) includes a cookware temperature sensor (14), a data processing unit (7) and a data transmission unit (8), wherein a metallic shield (3) is arranged on the inside of the lid (4). A system comprises an induction cookware unit and a cooking sensor (1).