Fusing Device Heat Insulation for Laser Printers
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Solution Overview
Problem
Laser printers and copy machines face significant heat loss due to the heat conductivity of metal structures in fusing devices, leading to increased electricity consumption and incomplete toner fusion, which affects printing quality.
Innovation Solution
A fusing device is designed with a heat insulating component, a heat generating component, a heat conducting component, a heat reflecting component, and a metal reinforcing component, where the heat insulating component isolates the heat conducting and reflecting components, and the metal reinforcing component is installed on the outer side to prevent heat transfer, reducing heat loss and maintaining temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal structure is directly connected to the heating metal plate for structural reinforcement, then the structural strength is improved, but heat loss increases due to metal's excellent heat conductivity
Solution Approach 1:
A heat insulating component is introduced as an intermediary between the metal reinforcing component and the heating metal plate. This intermediary blocks the direct thermal conduction path that would otherwise lead to heat loss, while still allowing the metal structure to provide its reinforcing function. The heat insulating component acts as a thermal barrier that prevents heat from escaping through the metal structure.
Solution Approach 2:
The fusing device employs a composite structure combining heat insulating material and metal reinforcing components. The heat insulating component is specifically positioned at the connection interface between the metal structure and heating plate, creating a composite assembly that leverages the mechanical strength of metal while minimizing its thermal conductivity drawback.
2Temperature
If more heat is generated continuously to compensate for heat loss, then the temperature requirement for toner fusion is maintained, but electricity consumption increases
Solution Approach 1:
The heat reflecting component redirects heat that would otherwise be lost back toward the heating metal plate and toner fusion area. By reflecting stray heat rays back to the functional zone, the system recovers energy that would have been wasted, thereby reducing the need for continuous additional heat generation and lowering electricity consumption.
Solution Approach 2:
The heat insulating component serves as a thermal barrier that prevents heat from escaping through the metal structure, forcing the heat to remain within the functional area where it is needed for toner fusion. This intermediary effectively traps and retains heat, improving thermal efficiency.
3Temperature
If great heat loss occurs, then the heating structure can maintain temperature, but toner fusion becomes incomplete and printing quality deteriorates
Solution Approach 1:
The heat insulating component is positioned between the metal structure and the heating metal plate to prevent heat from being conducted away from the fusion zone. This ensures that sufficient heat remains concentrated at the interface between the heating plate and toner, enabling complete fusion and high-quality printing output.
Solution Approach 2:
The heat reflecting component captures and redirects heat that would otherwise be lost, concentrating thermal energy back onto the toner and printing media. This ensures adequate heat delivery for complete toner fusion, directly improving printing quality by preventing incomplete fusion defects.
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 reduces electricity consumption and enhances printing quality by minimizing heat loss and maintaining the necessary temperature for effective toner fusion.
Implementation Method 1
a heat insulating component, a heat generating component, a heat conducting component, a heat reflecting component, a metal reinforcing component... The heat insulating component isolates the heat conducting and reflecting components
Implementation Method 2
The heat generating component is located inside the accommodating space and for generating heat
Implementation Method 3
The heat conducting component is connected to the heat insulating component and covers the opening... The heat conducting component conducts the heat to the fusing component
Implementation Method 4
The heat reflecting component is located inside the accommodating space and on a side of the heat generating component away from the heat conducting component for reflecting the heat generated by the heat generating component to the heat conducting component
Implementation Method 5
The fusing component contacts with the printing media to fuse the toners onto the printing media by heating
Data Source
AI summary
A fusing device includes a driving roller and a fusing unit including a heat insulating component, a heat generating component, a heat conducting component connected to the heat insulating component, a heat reflecting component, a metal reinforcing component and a fusing component. The heat generating component and the heat reflecting component are located inside the heat insulating component. The metal reinforcing component is located outside the heat insulating component and separated from the heat conducting component. The fusing component movably surrounds the heat conducting component, the heat insulating component and the metal reinforcing component. The heat reflecting component reflects heat generated from the heat generating component to the heat conducting component. The heat conducting component conducts the heat to the fusing component. The fusing component contacts with a printing media to fuse toners onto the printing media by heating when the driving roller drives the printing media to move.