Support Frame for Thin Electric Heating Band Positioning
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Solution Overview
Problem
Conventional hot air generating devices experience issues with the thin electric heating sheets vibrating and causing short circuits due to thermal expansion, and the sheets have poor positioning reliability as they are pulled away from their recesses by the air flow.
Innovation Solution
A support frame for a thin electric heating band is designed with multiple fixing sheets made of rigid insulation material stacked on first blades, and defining elements fixed on the air shadow fringe of the blades to prevent the electric heating band from contacting the supporting arm and to maintain its positioning reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the electric heating sheet is made thin to improve heat efficiency, then heat transfer performance is improved, but the sheet becomes more susceptible to vibration and cutting effects from air flow
Solution Approach 1:
The patent introduces fixing sheets as intermediary components between the electric heating sheet and the supporting arm. These fixing sheets serve as mediators that prevent direct contact between the vibrating heating sheet and the supporting arm, thereby eliminating the cutting effect while maintaining the thin-sheet design for improved heat transfer efficiency.
Solution Approach 2:
The fixing sheets are installed in advance on the supporting arm to provide protective cushioning before the heating sheet can cause damage. This preventive measure cushions the potential cutting effect of the vibrating heating sheet against the supporting arm, ensuring reliability while preserving the thin-sheet configuration.
2Stability of the object's composition
If the electric heating sheet is allowed to expand freely with thermal expansion, then thermal stress is reduced, but the sheet moves away from the recess and positioning reliability deteriorates
Solution Approach 1:
The fixing sheets act as intermediaries that accommodate thermal expansion while maintaining positioning. They allow the heating sheet to expand freely without letting it move away from the recess, thus preserving positioning reliability while reducing thermal stress through controlled movement.
Solution Approach 2:
The fixing sheets change the physical constraints on the heating sheet during thermal expansion. By modifying the boundary conditions through the fixing sheets, the system allows controlled expansion while maintaining position, resolving the contradiction between thermal stability and positioning reliability.
3Strength
If the supporting arm is made of metal to provide structural strength, then mechanical strength is improved, but the risk of short circuit increases when the heating sheet contacts the arm
Solution Approach 1:
The fixing sheets serve as intermediary insulating components between the metal supporting arm and the electric heating sheet. These intermediaries maintain the structural strength provided by the metal arm while preventing direct contact that would cause short circuits, thus resolving the contradiction between strength and safety.
Solution Approach 2:
The fixing sheets act as sacrificial protective layers that can be replaced if damaged. These inexpensive insulating components protect the valuable metal supporting arm and heating sheet assembly from short circuits, absorbing the harmful effect while maintaining system integrity.
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 enhances the positioning reliability of the electric heating band by preventing vibrations from causing cutting effects on the blades and supporting arms, thereby avoiding short circuits and ensuring consistent heat distribution.
Implementation Method 1
Electric current passes through each electric heating sheet so that the electric heating sheet converts electrical energy into heat energy by using the material resistance, thus producing heat
Implementation Method 2
When the electric heating sheet heats up to produce thermal expansion, a length of the electric heating sheet increases
Data Source
AI summary
A support frame of a thin electric heating band contains: a body, multiple first blades, multiple second blades, multiple fixing sheets, and multiple defining elements. The body includes a base and multiple supporting arms. Each first blade includes multiple first spaced recesses, and each second blade includes multiple second spaced recesses, such that the thin electric heating band is engaged in each first spaced recess and each second spaced recess, thus positioning the thin electric heating band. Each fixing sheet is stacked on each first blade and includes multiple spaced notches, and each spaced notch communicates with each first spaced recess laterally. Each first blade includes an air facing fringe and an air shadow fringe, and each defining element is fixed on the air shadow fringe of each first blade.