Fan Control for Image Forming Apparatus
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Solution Overview
Problem
Existing image forming apparatuses face inefficiencies in fan operation, leading to unnecessary power consumption and noise due to the fan running continuously after print operations, even when the internal temperature remains low.
Innovation Solution
The apparatus introduces a control unit that manages fan power based on predetermined time intervals and operational states, allowing the fan to operate with reduced power or stop when the non-operating state is prolonged, and deactivates suppression control under specific conditions such as frequent state changes or equipment usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the fan operates continuously after print operations, then the internal temperature is maintained low, but power consumption increases and noise is generated
Solution Approach 1:
The fan's operational state is dynamically adjusted based on the time elapsed since the last print operation. The control unit changes the fan's rotation speed or operation status from continuous to intermittent or stopped, depending on whether a predetermined time has elapsed since printing ceased, thereby optimizing power consumption while maintaining temperature control.
2Temperature
If the fan operates continuously after print operations, then heat is discharged from the apparatus, but unnecessary operation increases power consumption and noise
Solution Approach 1:
The fan's operational state is dynamically adjusted based on the time elapsed since the last print operation. The control unit changes the fan's rotation speed or operation status from continuous to intermittent or stopped, depending on whether a predetermined time has elapsed since printing ceased, thereby optimizing power consumption while maintaining temperature control.
3Use of energy by moving object
If the fan operation is minimized, then power consumption and noise are reduced, but temperature control may be insufficient
Solution Approach 1:
The control unit monitors the time elapsed since the last print operation and uses this feedback to determine the fan's operational state. By comparing the elapsed time against a predetermined threshold, the system intelligently adjusts fan operation to balance temperature control requirements with power consumption reduction, ensuring adequate cooling when needed while minimizing unnecessary operation.
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 approach effectively reduces unnecessary fan operation, maintaining internal temperatures, minimizing power consumption, and prolonging the fan's service life by optimizing power usage based on operational patterns.
Implementation Method 1
a fixing device for fixing a toner image on a print material by heat
Implementation Method 2
a fan for suppressing increase of temperature inside the image forming apparatus by the heat, and a control unit for controlling operation of the fan
Data Source
AI summary
An image forming apparatus has an operating state and a non-operating state with power consumption smaller than in the operating state. The image forming apparatus includes a fixing device for fixing a toner image on a print material by heat, a fan for discharging heat from the image forming apparatus, and a control unit for controlling operation of the fan. When a non-operating time from shifting to the non-operating state to shifting to the operating state is shorter than a predetermined time, the control unit allows the fan to operate with predetermined power in the operating state. When the non-operating time is equal to or longer than the predetermined time, the control unit stops the fan or allows the fan to operate with power smaller than the predetermined power in the operating state.