Fixing Device Heating Unit Airflow Synchronization
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Solution Overview
Problem
Existing image forming apparatuses face challenges in preventing excessive heating of recording media when the air-sending device stops during operation, leading to potential overheating issues.
Innovation Solution
A fixing device with a heating unit that heats the recording medium contactlessly, an air-sending device that sends air to the back surface, and a controller that detects the operational state of the air-sending device to adjust the heating unit's operation accordingly, ensuring the recording medium is not excessively heated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heating unit operates continuously to ensure proper heating of the recording medium, then the heating effectiveness is improved, but the recording medium may be excessively heated when the air-sending device stops
Solution Approach 1:
The controller detects the operational state of the air-sending device and uses this feedback to control the heating unit. When the air-sending device stops, the controller stops the heating unit to prevent excessive heating. When the air-sending device operates, the controller operates the heating unit to ensure proper heating effectiveness.
Solution Approach 2:
The heating unit's operation is made dynamic by linking it to the operational state of the air-sending device. The heating unit operates only when the air-sending device is operating, allowing the system to adapt to changing conditions and prevent excessive heating while maintaining heating effectiveness when needed.
2Object-affected harmful factors
If the heating unit is stopped when the air-sending device stops to prevent excessive heating, then the harmful effects are reduced, but the heating effectiveness may be insufficient when the air-sending device operates
Solution Approach 1:
The controller continuously monitors the operational state of the air-sending device and adjusts the heating unit accordingly. This feedback mechanism ensures that the heating unit operates only when the air-sending device is operating, maintaining heating effectiveness while preventing excessive heating when the air-sending device stops.
Solution Approach 2:
The system dynamically adjusts the heating unit's operation based on the air-sending device's state. The heating unit is operated when the air-sending device operates and stopped when it stops, creating a responsive system that maintains heating effectiveness while preventing harmful excessive heating.
3Measurement precision
If the controller monitors the air-sending device operation to control the heating unit, then the temperature control precision is improved, but the device complexity increases
Solution Approach 1:
The controller detects the operational state of the air-sending device and uses this simple feedback signal to control the heating unit. This approach achieves precise temperature control by linking the heating unit's operation directly to the air-sending device's operational state, without requiring complex monitoring or control algorithms.
Solution Approach 2:
The controller uses the existing operational state information of the air-sending device to automatically control the heating unit. The system leverages the air-sending device's own operational signals to regulate heating, eliminating the need for separate complex temperature sensing and control mechanisms.
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 excessive heating by synchronizing the operation of the heating unit with the air-sending device, maintaining optimal conditions for the recording medium during transport and fixing processes.
Implementation Method 1
a heating unit that is disposed on a path for transporting a recording medium by using a transport device for transporting the recording medium and that heats a front surface of the recording medium in a contactless manner
Implementation Method 2
an air-sending device that faces the heating unit and that sends air to a back surface of the recording medium
Data Source
AI summary
A fixing device includes: a heating unit that is disposed on a path for transporting a recording medium by using a transport device for transporting the recording medium and that heats a front surface of the recording medium in a contactless manner; an air-sending device that faces the heating unit and that sends air to a back surface of the recording medium; and a controller that includes a detection unit for detecting an operational state of the air-sending device and that causes the heating unit to operate in a case where the detection unit detects an operation of the air-sending device.