Toner Collection Airflow Balancing to Prevent Aggregation
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Solution Overview
Problem
Existing toner collecting devices have low toner recovery rates and are prone to toner aggregation due to inefficient airflow circulation and inappropriate filtration area ratios, leading to increased costs and operational inefficiencies.
Innovation Solution
A toner collecting device with a centrifugation cylinder, airflow inlet, airflow outlet, toner collector, and suction unit with a filtration filter, where the airflow suction ratio and filtration area ratio are optimized to reduce friction and pressure on toner, preventing aggregation and improving recovery efficiency through controlled airflow circulation and backwashing of the filtration filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a suction unit with filtration filter is added to the toner collecting device, then the toner recovery rate is improved, but the device complexity increases
Solution Approach 1:
The suction unit and filtration filter are integrated into the existing toner collecting device structure, combining multiple functions (suction, filtration, toner collection) into a unified system. The filtration filter is positioned to work in conjunction with the centrifugation cylinder and toner collector, creating a coordinated multi-component system that improves recovery rate without proportionally increasing complexity
Solution Approach 2:
The suction unit serves multiple functions: it creates airflow circulation within the centrifugation cylinder, operates the filtration filter for toner separation, and works coordination with the toner collector. The filtration filter simultaneously separates toner particles and enables continuous operation. This multi-functionality approach improves productivity while managing device complexity through functional integration
2Stability of the object's composition
If the filtration area of the filtration filter is increased, then the toner aggregation is reduced, but the device complexity and maintenance requirements increase
Solution Approach 1:
The patent optimizes the filtration area parameter to a specific range (0.4 to 4.0 times the suction quantity in normalized units) to achieve the desired balance. By carefully controlling this parameter, the system reduces toner aggregation while avoiding excessive device complexity. The optimized parameter allows effective toner separation without requiring overly large filter surfaces that would increase maintenance requirements
3Productivity
If the suction quantity is increased, then the toner recovery rate is improved, but the friction and pressure on toner increase causing aggregation
Solution Approach 1:
The patent establishes an optimized relationship between suction quantity and filtration area, where the filtration area is set to 0.4 to 4.0 times the suction quantity. This parameter optimization ensures that sufficient airflow is maintained for high toner recovery while preventing excessive friction and pressure that would cause aggregation. The balanced parameter relationship allows continuous operation with minimal toner damage
4Productivity
If continuous operation is implemented, then the productivity is improved, but the maintenance requirements increase
Solution Approach 1:
The suction unit and filtration filter are designed to operate continuously during toner collection, maintaining constant airflow and separation processes. This continuous operation ensures high productivity by eliminating idle time. The system's continuous operation is supported by the optimized parameter relationships that prevent toner aggregation and filter clogging, thereby reducing maintenance frequency despite continuous use
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 method enhances toner recovery rates and reduces aggregation, enabling continuous operation with improved performance and reduced maintenance needs.
Implementation Method 1
a centrifugation cylinder to which an airflow containing a toner is introduced and in which the toner is centrifugally separated by a swirling flow caused by the introduced airflow
Implementation Method 2
a suction unit that suctions the inside of the centrifugation cylinder through the toner collector and has a filtration filter through which the toner in the suctioned airflow is filtered out
Data Source
AI summary
A method for producing a toner includes collecting a toner by using a toner collecting device including: a centrifugation cylinder to which an airflow containing a toner is introduced and in which the toner is centrifugally separated by a swirling flow caused by the introduced airflow; an airflow inlet through which the airflow containing the toner is introduced to the centrifugation cylinder; an airflow outlet that is located at an upper end of the centrifugation cylinder and through which the airflow from which the toner has been separated in the centrifugation cylinder is discharged; a toner collector that is located at a lower end of the centrifugation cylinder and in which the toner separated in the centrifugation cylinder is collected; and a suction unit that suctions the inside of the centrifugation cylinder through the toner collector and has a filtration filter through which the toner in the suctioned airflow is filtered out. The ratio of a suction quantity QBD (m3/min) of the airflow suctioned by the suction unit to an introduction quantity Qin (m3/min) at which the airflow containing the toner is introduced to the centrifugation cylinder is more than 0% and 30% or less. The ratio of a filtration area (m2) of the filtration filter to the suction quantity QBD (m3/min) of the airflow suctioned by the suction unit is 0.4 or more and 4.0 or less.