Heating Body Differential Thermal Expansion Support
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Solution Overview
Problem
In existing heating bodies, the carbon filament expands due to thermal expansion, leading to physical contact with the quartz tube, causing damage and reducing the lifespan of the heating device.
Innovation Solution
The use of multiple heating members with different thermal expansion coefficients, where one member supports another to prevent contact with the tube, thereby maintaining a stable distance and preventing damage during high-temperature operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carbon filament is extended by external force to prevent contact with the quartz tube, then the filament can be maintained without contacting the tube during operation, but the filament expands due to thermal expansion and eventually contacts the tube, causing damage
Solution Approach 1:
The patent changes the physical parameter of thermal expansion coefficients by using multiple heating members with different materials. The first heating member has a higher thermal expansion coefficient than the second heating member, creating a self-regulating system where the differential expansion prevents contact with the quartz tube while maintaining operational stability
Solution Approach 2:
The patent employs composite material structure by combining multiple heating members with different material properties (different thermal expansion coefficients) into a single heating assembly. This composite approach allows the system to exploit the differential thermal expansion behavior to maintain proper spacing and prevent tube contact
2Device complexity
If a single heating member is used, then the structure is simple, but the heating member contacts the tube due to thermal expansion, causing damage
Solution Approach 1:
The patent applies local quality by assigning different thermal expansion characteristics to different parts of the heating assembly. The first heating member is designed with higher thermal expansion coefficient than the second heating member, creating localized differential expansion zones that work together to prevent contact with the quartz tube
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 extends the lifespan of the heating body by preventing contact between the heating members and the tube, allowing for stable high-temperature operation without damaging the quartz tube.
Implementation Method 1
the carbon filament expands according to its thermal expansion coefficient when emitting heat at a high temperature
Data Source
AI summary
A heating body is provided. The heating body includes a plurality of heating members having different thermal expansion coefficients and a tube in which the heating members are disposed. At least one of the plurality of heating members supports other heating member.