Exhaust Purification Apparatus Airflow Detection and Filtration
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Solution Overview
Problem
Image forming apparatuses generate byproducts that are not thoroughly captured by internal filters, leading to incomplete exhaust purification, and users face challenges in distinguishing between outlets and inlets, which can result in improper attachment of exhaust purification apparatuses, affecting device operation and image quality.
Innovation Solution
An exhaust purification apparatus with a purification duct, airflow detector, and controller that determines the correct ventilation port for attachment, preventing airflow obstruction and ensuring proper connection by executing a normal mode and attachment determination mode to disable incorrect connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a purification filter with finer mesh is used to capture smaller byproducts, then purification effectiveness is improved, but ventilation resistance increases
Solution Approach 1:
The exhaust purification apparatus divides the purification function into multiple filters with different mesh sizes. A first filter with coarser mesh captures larger byproducts while maintaining low ventilation resistance, and a second filter with finer mesh captures smaller byproducts. This segmentation allows each filter to operate at optimal efficiency without excessive resistance buildup.
Solution Approach 2:
The apparatus uses a two-stage filtration system where the first filter handles the bulk of particle capture (partial action on larger particles), and the second filter handles remaining smaller particles. This partial action approach prevents the need for a single fine mesh filter that would create excessive ventilation resistance, achieving sufficient purification through distributed filtering.
2Ease of operation
If the exhaust purification apparatus is attached to a ventilation port without proper identification, then attachment simplicity is improved, but device operability deteriorates
Solution Approach 1:
The apparatus includes a lighting indicator that changes color or illuminates to indicate whether the attached ventilation port is an inlet or outlet. This visual feedback mechanism allows users to quickly identify the correct port type without complex markings, maintaining ease of attachment while ensuring proper connection for reliable operation.
Solution Approach 2:
The apparatus provides real-time feedback through lighting indicators about the correctness of the attachment. The lighting unit communicates the port type (inlet/outlet) status to the user, enabling immediate correction if attached to the wrong port type, thus maintaining both simplicity and reliability.
3Productivity
If the fan operates continuously to discharge air, then exhaust purification is improved, but energy consumption increases
Solution Approach 1:
The fan operates periodically rather than continuously, activating during image formation operations when exhaust purification is needed and remaining inactive during idle periods. This periodic operation maintains effective exhaust purification during critical times while significantly reducing overall energy consumption during non-operational periods.
Solution Approach 2:
The apparatus automatically detects operational status and controls fan activation accordingly, eliminating the need for manual intervention. The system self-regulates fan operation based on detected image formation activities, ensuring purification when needed and energy savings when not needed.
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
Effectively recovers byproducts while preventing adverse effects on image forming apparatuses and maintaining image quality by accurately determining and managing airflow connections, ensuring complete exhaust purification.
Implementation Method 1
an airflow detector configured to detect an airflow at the inlet
Implementation Method 2
a fan configured to direct air from the inlet toward the outlet
Implementation Method 3
a filter configured to recover particles in the air
Data Source
AI summary
An exhaust purification apparatus includes: a purification duct configured to purify air to be discharged from a ventilation port in an image forming apparatus, the purification duct including: at least one inlet communicating with an interior of the purification duct for connection with the ventilation port in the image forming apparatus; an outlet configured to discharge air inside the purification duct to the outside; a fan configured to direct air from the inlet toward the outlet; a filter configured to recover particles in the air, the fan and the filter each being disposed in the purification duct at a position between the inlet and the outlet; an airflow detector configured to detect an airflow at the inlet; and a controller configured to execute a normal mode and an attachment determination mode.