Oven Heating Element Temperature Switch to Prevent Overheating
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Solution Overview
Problem
Existing electric ovens lack effective solutions to prevent abnormal operation of bake and broil elements, which can lead to overheating, potential fires, and damage to the appliance and surrounding areas, as current methods either limit wattage, requiring longer preheating times or require additional redundant controls that need separate testing and can interfere with normal cooking operations.
Innovation Solution
Integration of a temperature sensing device and switch along the bake and broil elements, which can open the electrical circuit to prevent further heat input 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 preheating time increases
Solution Approach 1:
The patent implements a temperature sensing device that continuously monitors the oven temperature and provides feedback to a control system. When the temperature reaches a predetermined safe level, the system automatically adjusts or interrupts heating element operation, ensuring safety without requiring prolonged preheating times. This closed-loop feedback mechanism dynamically balances safety requirements with cooking efficiency.
2Reliability
If redundant controls are added within oven walls, then safety is improved, but device complexity increases
Solution Approach 1:
The patent employs a temperature sensing device that automatically monitors and controls heating element operation without requiring additional manual intervention or complex redundant control systems. The sensor and control mechanism work together as an integrated self-regulating system that prevents overheating through automatic temperature regulation, eliminating the need for separate redundant controls and reducing overall device complexity.
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 effectively reduces the statistical likelihood of overheating and cooking fires by allowing for continuous operation within safe temperature ranges, enhancing safety without the need for additional components or complex engineering, while maintaining the oven's utility and ease of installation.
Implementation Method 1
sense heat radiated from a traditional element construction throughout the oven space
Implementation Method 2
resistive heating portions
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.