Fusing Belt Heat Absorption for Local Fire Prevention
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Solution Overview
Problem
Image forming apparatuses using electrophotographic methods face the risk of fusing belt fires due to abnormal overheating, which can occur quickly with thinner belts and more efficient heaters, necessitating a solution to prevent such fires.
Innovation Solution
A device is integrated into the image forming apparatus to detect and cut off power to the heater when the fusing belt reaches a critical temperature, and includes heat absorption members to dissipate latent heat, using materials with high thermal conductivity like aluminum to prevent fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the fusing belt is made thinner and the heater is made more efficient, then the fusing speed and energy efficiency are improved, but the risk of overheating and fire increases
Solution Approach 1:
The patent applies preliminary action by installing a temperature sensor and control system that detects temperature changes before they reach critical levels. The system proactively cuts off power to the heater when the temperature exceeds a predetermined threshold, preventing overheating and fire before they can occur. This anticipatory approach allows the use of thinner, more efficient fusing belts while maintaining safety.
Solution Approach 2:
The patent implements feedback control through a temperature sensor that continuously monitors the fusing belt temperature and provides real-time information to the control system. Based on this feedback, the controller adjusts or cuts off power to the heater to maintain safe operating temperatures. This closed-loop feedback mechanism enables the system to prevent overheating while maximizing the efficiency of thinner fusing belts.
2Power
If the heater power is increased to improve fusing efficiency, then the fusing performance is improved, but the temperature control precision and fire safety are compromised
Solution Approach 1:
The patent uses feedback control where a temperature sensor continuously monitors the fusing belt temperature and provides real-time data to the controller. The controller adjusts the heater power based on this feedback, reducing power when temperature approaches the threshold and cutting off power completely when the threshold is exceeded. This enables high heater power for improved fusing performance while maintaining reliable temperature control and fire safety through automatic regulation.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the heater power level based on temperature conditions. The system transitions between different power states (full power, reduced power, off) depending on the real-time temperature readings. This dynamic parameter adjustment allows the system to achieve high fusing efficiency when needed while maintaining safety through automatic power reduction or cutoff when temperature thresholds are approached.
3Object-affected harmful factors
If a temperature detection and power cutoff system is added, then the fire prevention capability is improved, but the device complexity increases
Solution Approach 1:
The patent applies self-service by implementing an automatic temperature monitoring and power cutoff system that operates without human intervention. The temperature sensor continuously monitors the fusing belt temperature, and the controller automatically cuts off power when the temperature exceeds the predetermined threshold. This self-regulating system prevents fire through automatic protection rather than requiring manual monitoring or complex external safety systems, thereby improving fire prevention while minimizing the increase in device complexity.
Solution Approach 2:
The patent extracts the temperature monitoring and control function as a separate, dedicated subsystem with minimal components (temperature sensor, controller, and power cutoff mechanism). By isolating this safety function into a simple, dedicated system rather than integrating it into the existing complex fusing mechanism, the patent achieves improved fire prevention with minimal added complexity. The extracted subsystem operates independently with clear, simple logic.
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 effectively prevents fusing belt fires by quickly cutting off power and absorbing latent heat, thereby extending the time before a fire can occur and ensuring the safety and reliability of the apparatus.
Implementation Method 1
a heat absorption member 130 which absorbs the local latent heat of the fusing belt 93
Implementation Method 2
a heat absorption member 130 which absorbs the local latent heat of the fusing belt 93
Data Source
AI summary
A device to prevent fire of a fusing belt having a heater positioned inside includes at least one temperature control member adjacent to one side of the fusing belt and, when the at least one temperature control member detects abnormal heat from the fusing belt based on a temperature of the fusing belt, the at least one temperature control member to cut off a supply of electricity to the heater to prevent the fire. The device also includes a heat absorption member adjacent to the other side of the fusing belt and to absorb latent heat from the fusing belt to lower the temperature of the fusing belt to prevent the fire.