Image Forming Apparatus Condensation Detection and Removal
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Solution Overview
Problem
Condensation on the optical system of image forming apparatuses can lead to degraded image quality due to water droplets, and existing solutions require condensation removal at the time of use, which can be inconvenient and less energy-efficient.
Innovation Solution
An image forming apparatus with a control unit that activates the image reading unit and fixing unit before the estimated start-of-use time to detect and remove condensation, using an induction heating method to heat the fixing roller and create a low-humidity airflow to vaporize condensation, thereby preventing image degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a heating process is performed to remove condensation from the optical system, then condensation is removed and image quality is improved, but the apparatus requires use restriction and extended operation time before normal use can resume
Solution Approach 1:
The patent applies preliminary action by detecting condensation on the optical system in advance and initiating a heating process before the user attempts to use the apparatus. The control unit monitors the optical system temperature and humidity, and when condensation is detected, it activates the heating element to remove moisture before normal operations begin, thus eliminating the need to postpone use until condensation clears naturally.
Solution Approach 2:
The patent implements preliminary anti-action by using a heating process to counteract the harmful condensation effect before it can degrade image quality. The control unit detects condensation and immediately activates heating to vaporize the moisture, preventing the condensation from affecting the optical system during normal operation.
2Measurement precision
If the image reading unit is activated to detect condensation, then condensation detection is achieved, but energy is consumed during the detection process
Solution Approach 1:
The patent applies periodic action by activating the image reading unit only at specific intervals or under specific conditions (such as when temperature and humidity thresholds are approached) rather than continuously. The control unit monitors environmental parameters and triggers the image reading unit only when condensation is likely to occur, reducing unnecessary energy consumption while maintaining detection accuracy.
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 condensation before use, ensuring image quality and reducing the time and energy required for condensation removal, enhancing user convenience and energy efficiency.
Implementation Method 1
heats the fixing unit in response to a detection of occurrence of condensation, and stops the heating before the estimated start-of-use time
Implementation Method 2
uses an induction heating method to heat the fixing roller and create a low-humidity airflow to vaporize condensation
Implementation Method 3
create a low-humidity airflow to vaporize condensation
Data Source
AI summary
An image forming apparatus includes an image reading unit, a fixing unit, a time setting unit, and a control unit. The image reading unit moves a running body having an onboard optical system. The fixing unit heats toner transferred onto the print medium and applies pressure on the heated toner with respect to the print medium to fix the toner. The time setting unit sets an estimated time when use of the image forming apparatus starts. The control unit controls the image reading unit, the fixing unit, and the time setting unit. The control unit, prior to the set estimated start-of-use time by a predetermined period set in advance, activates the image reading unit to detect whether condensation has occurred in the optical system, heats the fixing unit in response to a detection of occurrence of condensation, and stops the heating before the estimated start-of-use time.