Conveying Part Gravity Retraction for Drying Device Overheat Prevention
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Solution Overview
Problem
Existing drying devices face issues where heat remaining in the heat source continues to raise the temperature of the sheet even after the device stops due to abnormalities or power cuts.
Innovation Solution
The drying device includes a conveying part that can be quickly lowered from a heating position to a retreating position when power is cut off, separating it from the heating part to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device stops due to abnormality or power cut, then the operation is halted, but the heat remaining in the heat source continues to raise the temperature of the sheet
Solution Approach 1:
The conveying part is designed to automatically retreat from the heating position when power is cut off, creating a preliminary protective action against the harmful effect of residual heat. This automatic retreat mechanism activates before the heat can cause damage, preventing overheating by removing the sheet from the heat source's influence range.
Solution Approach 2:
The system uses its own weight and gravity to automatically lower the conveying part from the heating position when power is cut off, without requiring external control systems or additional energy input. The conveying part self-actuates the retreat motion through gravitational force, achieving safety through self-service.
2Object-affected harmful factors
If a shutter is used to block light from the halogen heater, then the heat radiation is blocked, but the heat remaining in the heat source still raises the temperature
Solution Approach 1:
Instead of trying to block the heat radiation with a shutter, the invention extracts the sheet (conveying part) from the heat source's influence range by lowering it to a retreating position. This removes the affected object from the harmful thermal environment, achieving temperature control through spatial separation rather than radiation blocking.
3Reliability
If the conveying part is quickly lowered from heating position to retreating position when power is cut off, then the sheet is separated from heat source, but the mechanism requires additional structural components
Solution Approach 1:
The supporting part utilizes the conveying part's own weight and gravity to drive the retreat motion, eliminating the need for motors, sensors, or control systems. The gravity-driven mechanism automatically lowers the conveying part when power is cut off, achieving quick separation with minimal additional structural complexity.
Solution Approach 2:
Instead of using an active mechanism to push or pull the conveying part to the retreat position, the invention inverts the approach by allowing gravity to naturally pull it down. The supporting part structure is designed to facilitate this passive gravitational motion rather than resisting it, simplifying the overall system.
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 possibility of overheating by quickly separating the conveying part from the heating part, ensuring safer operation during power failures or abnormalities.
Implementation Method 1
a halogen heater that emits infrared radiation is used as the heat source for radiant heat
Implementation Method 2
when the power supplying to the supporting part is cut off, a force by which the conveying part is supported in the heating position is weakened, and the conveying part is lowered to a retreating position separated downward from the heating part
Data Source
AI summary
A drying device (7) is a drying device which dries a sheet while conveying the sheet. The drying device (7) includes a conveying part (15) which conveys the sheet in a predetermined conveyance direction; a heating part (13) which is arranged above the conveying part (15) and dries the sheet conveyed by the conveying part (15); and a supporting part (17) which supports the conveying part (15) in a heating position where the sheet is heated by the heating part (13), by power supplying, wherein when the power supplying to the supporting part (17) is cut off, a force by which the conveying part (15) is supported in the heating position is weakened, and the conveying part (15) is lowered to a retreating position separated downward from the heating part (13).