Heating Roller Auxiliary Heating for Axial Temperature Uniformity
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Solution Overview
Problem
Existing heating devices with resistance heating layers experience uneven temperature distribution at the opposite ends of the heating roller in the axial direction, leading to inefficiencies in heating processes.
Innovation Solution
Incorporation of an auxiliary heating unit that supplements heat to the axial end regions of the heating roller, where the resistance heat-generating layer is located, to ensure uniform temperature distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If only a resistance heat-generating layer is used for heating, then the device structure remains simple, but uneven temperature distribution occurs at the axial end regions of the heating roller
Solution Approach 1:
The heating system is segmented into two independent parts: a resistance heat-generating layer for main heating and an auxiliary heating unit for supplementary heating at axial end regions. This segmentation allows each component to address specific heating needs, resolving the temperature uniformity issue while maintaining clear functional division
Solution Approach 2:
The auxiliary heating unit is specifically positioned at the axial end regions where temperature deficiency occurs. This local quality approach targets the problematic areas with additional heating capability, ensuring uniform temperature distribution without unnecessarily complicating the entire heating structure
2Temperature
If an auxiliary heating unit is added to supplement heat at axial end regions, then temperature distribution uniformity improves, but the device structure becomes more complex
Solution Approach 1:
The auxiliary heating unit is integrated with the heating roller structure, merging the supplementary heating function into the existing device framework. This combining approach achieves uniform temperature distribution while minimizing the increase in overall device complexity through structural integration
3Temperature
If the resistance heat-generating layer covers the entire surface, then heating coverage is complete, but temperature uniformity at axial ends deteriorates
Solution Approach 1:
The auxiliary heating unit provides preliminary or supplementary heating at the axial end regions before the main resistance heating layer can effectively heat these areas. This preliminary action compensates for the inherent heating deficiency at the ends, ensuring both complete coverage and uniform temperature distribution, thereby maintaining high heating efficiency
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 auxiliary heating unit effectively suppresses uneven temperature distribution, ensuring consistent heating performance across the entire heating roller, thereby improving the efficiency of heating processes.
Implementation Method 1
a heating roller (53A) having a resistance heat-generating layer (533) that generates heat by passage of a current through the resistance heat-generating layer (533)
Implementation Method 2
an auxiliary heating unit (7) that supplementarily heats at least an axial end region (E1, E2) included in a heat-generating region in which heat is generated by the resistance heat-generating layer (533) of the heating roller (53A)
Data Source
AI summary
A heating device includes a heating roller having a resistance heat-generating layer that generates heat by passage of a current through the resistance heat-generating layer, a pressure rotating body that rotates in such a manner as to press a sheet-shaped heating target that is an object to be subjected to a heating treatment against an outer peripheral surface of the heating roller and in such a manner as to cause the heating target to pass through the outer peripheral surface of the heating roller, and an auxiliary heating unit that supplementarily heats at least an axial end region included in a heat-generating region in which heat is generated by the resistance heat-generating layer of the heating roller.