Bake and Broil Element Temperature Switch to Reduce Oven Overheating
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Solution Overview
Problem
Existing electric oven designs fail to effectively control abnormal operation of bake and broil elements, leading to potential overheating and safety hazards, as they either limit wattage, which reduces oven utility, or require additional redundant controls that are complex and prone to misconfiguration.
Innovation Solution
Integration of a temperature sensing device along the bake and broil elements with a switch that opens to prevent electrical flow when a predetermined temperature is reached, allowing for safe operation within the cooking chamber without modifying the oven construction, and resetting when the temperature drops below a lower limit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wattage of heating elements is limited to pass safety standards, then safety is improved, but oven utility and preheating speed deteriorate
Solution Approach 1:
The patent changes the control parameter from fixed wattage limitation to dynamic temperature monitoring. The temperature sensing device detects actual temperatures and triggers circuit interruption only when abnormal temperature thresholds are exceeded, allowing normal high-wattage operation for fast preheating while preventing dangerous overheating conditions.
2Reliability
If redundant controls are added to walls to prevent overheating, then safety is improved, but device complexity increases
Solution Approach 1:
The patent extracts the temperature sensing function directly from the heating element structure by integrating the sensing device along the element itself. This eliminates the need for separate wall-mounted redundant controls and complex external sensing systems, simplifying the overall control architecture while maintaining safety functionality.
Solution Approach 2:
The heating element becomes self-monitoring through the integrated temperature sensing device. The element detects its own temperature conditions and triggers protective circuit interruption independently, without requiring complex external control systems or additional sensors mounted in the oven walls.
3Measurement precision
If temperature sensing is performed close to heating portions, then temperature detection accuracy is improved, but false sensing of conducted heat increases
Solution Approach 1:
The patent segments the heating element into multiple sections with the temperature sensing device positioned at specific locations along the element. This segmentation allows the sensor to monitor temperature at critical points while being spaced to avoid false readings from conducted heat, enabling accurate detection of abnormal temperature conditions.
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 reduces the statistical likelihood of overheating and cooking fires by allowing normal operation while preventing abnormal temperature thresholds, enhancing safety without the need for separate processors or complex engineering, and allowing for easy replacement of traditional elements with temperature-controlled ones.
Implementation Method 1
a temperature sensing device along the bake and broil elements with a switch that opens to prevent electrical flow when a predetermined temperature is reached
Implementation Method 2
a switch that opens to prevent electrical flow when a predetermined temperature is reached
Data Source
AI summary
An oven has at least one of bake and broil heating elements which have a temperature switch as a portion of the replaceable heating element. Upon reaching a predetermined temperature, the switch opens and power through the heating element is secured. Once temperature is reduced below another predetermined temperature, the switch closes for normal operation.