Oven Temperature Detector Positive Motion Stop for Damage Prevention
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Solution Overview
Problem
Domestic kitchen ovens face a challenge in accurately measuring the average temperature of the cooking chamber due to temperature gradients, and existing temperature detectors are prone to damage from contact with cooking utensils or racks, especially when positioned for optimal temperature detection.
Innovation Solution
A resistive temperature detector is positioned in the middle 50% vertically of the cooking chamber's wall, surrounded by a protective positive motion stop made of strong material like stainless steel, which allows for accurate temperature sensing while minimizing the risk of damage from objects in the chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the temperature detector is positioned in the upper corner of the cooking chamber to avoid contact with cooking utensils and racks, then the likelihood of damage to the temperature detector is reduced, but the accuracy of detecting the average temperature in the cooking chamber deteriorates
Solution Approach 1:
The temperature detector is segmented into two distinct parts: a protected mounting portion positioned in the upper corner (away from cooking utensils and racks) and a sensing portion that extends downward into the cooking chamber to reach the optimal temperature measurement zone. This segmentation allows each part to fulfill its specific function - the mounting portion provides protection while the sensing portion ensures accurate temperature detection.
Solution Approach 2:
The temperature detector acts as an intermediary element that bridges the gap between the safe upper corner location and the optimal temperature sensing zone. By extending the sensing portion downward, the detector mediates between the conflicting requirements of protection and accurate measurement, allowing the system to benefit from both locations.
2Measurement precision
If the temperature detector is positioned in the middle 50% vertically of the cooking chamber wall to accurately detect average temperature, then temperature measurement accuracy is improved, but the temperature detector becomes more susceptible to damage from contact with cooking utensils or racks
Solution Approach 1:
The temperature detector is divided into a protected mounting portion and an exposed sensing portion. The mounting portion remains in the upper corner where it is protected from contact, while the sensing portion extends downward to reach the middle 50% vertical zone for accurate temperature measurement.
Solution Approach 2:
The temperature detector utilizes vertical dimensionality by extending downward from the upper corner mounting location. This vertical extension allows the sensing portion to reach the optimal measurement zone without requiring the entire detector to be repositioned to a more vulnerable location.
3Reliability
If a protective device is added around the temperature detector to protect it from contact damage, then the reliability of the temperature detector is improved, but the device complexity increases
Solution Approach 1:
The protective function is merged with the temperature detector itself by forming an integrated assembly where the mounting portion and sensing portion are combined into a single unit. This eliminates the need for separate protective structures and reduces overall device complexity while maintaining protection effectiveness.
Solution Approach 2:
The temperature detector assembly serves multiple functions: the upper corner mounting provides structural support and protection, the downward extension provides accurate temperature sensing, and the integrated design provides protection from contact damage. This multi-functionality reduces the need for additional protective 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 configuration ensures accurate detection of the average cooking chamber temperature while protecting the temperature detector from potential damage, ensuring reliable and precise temperature readings.
Implementation Method 1
a temperature detector located in the cooking chamber and configured to detect a temperature in the cooking chamber
Data Source
AI summary
A domestic cooking appliance for heating a food item is provided. The domestic cooking appliance includes a housing; a cooking chamber located in the housing and having a wall, the cooking chamber being configured to contain the food item while the food item is being heated; a heating element that provides heat to the cooking chamber for heating the food item; a temperature detector located in the cooking chamber and configured to detect a temperature in the cooking chamber; and a temperature detector positive motion stop located in the cooking chamber and surrounding a portion of the temperature detector.