Powder Processing Apparatus Ultrafine Particle Capture
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Solution Overview
Problem
Existing powder processing apparatuses fail to effectively capture and recirculate ultrafine particles produced during the processing of media, leading to their scattering outside the apparatus and environmental contamination.
Innovation Solution
A powder processing apparatus is designed with an exhaust unit and an intake unit, both equipped with capturing parts and airflow generating components, where the intake unit is positioned below the exhaust unit to recirculate and aggregate ultrafine particles, enhancing their capture efficiency by maintaining airflow and particle collision within the apparatus housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If only an exhaust unit is provided to remove ultrafine particles, then particle scattering outside the apparatus is reduced, but particle capture efficiency is insufficient due to lack of recirculation
Solution Approach 1:
The intake unit creates a feedback loop by recirculating exhausted air back into the apparatus housing. This allows ultrafine particles that escaped initial capture to be recaptured, improving overall capture efficiency while reducing external scattering.
Solution Approach 2:
Instead of simply discarding exhausted air outside the apparatus, the system recovers it through the intake unit and recirculates it back into the housing, allowing for additional particle capture opportunities and reducing waste.
2Device complexity
If the intake unit is positioned above the exhaust unit, then airflow generation is simpler, but ultrafine particles settle outside the apparatus due to gravity before being recirculated
Solution Approach 1:
The intake unit is positioned below the exhaust unit, inverting the conventional arrangement. This ensures that particles settling downward due to gravity are still within the recirculation path and can be captured, preventing external scattering.
Solution Approach 2:
The system considers the vertical dimension and gravity's effect on particle movement. By positioning the intake below the exhaust, the design accounts for gravitational settling and ensures particles remain within the recirculation zone throughout their descent.
3Productivity
If the fixing unit operates continuously, then processing productivity is maintained, but ultrafine particles are continuously generated requiring prolonged airflow operation
Solution Approach 1:
The airflow generating parts are activated before the fixing unit starts operation and continue running after it stops. This preliminary and extended operation ensures particles are captured during transitions and prevents scattering during startup and shutdown phases.
Solution Approach 2:
The airflow generation is made continuous, extending beyond the fixing unit's operational periods. This ensures uninterrupted particle capture during particle generation phases and during transitions, maintaining system effectiveness throughout the entire process cycle.
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 apparatus significantly reduces the scattering of ultrafine particles outside the housing by continuously operating the airflow generating parts after the fixing unit has completed its operation, ensuring prolonged recirculation and aggregation, thereby maintaining high ultrafine-particle capture efficiency.
Implementation Method 1
a first airflow generating part that generates exhaust airflow... a second airflow generating part that generates intake airflow
Implementation Method 2
a first capturing part capable of capturing the ultrafine particles... a second capturing part capable of capturing the ultrafine particles
Implementation Method 3
a fixing unit that is provided in an apparatus housing and heats powder containing ultrafine particles to fix the powder on a processed medium
Implementation Method 4
An intake port of the intake unit is provided below an exhaust port of the exhaust unit in a gravity direction
Data Source
AI summary
A powder processing apparatus includes: a fixing unit that is provided in an apparatus housing and heats powder containing ultrafine particles to fix the powder on a processed medium; an exhaust unit including an exhaust path through which air near the fixing unit can be exhausted, a capturing part capable of capturing the ultrafine particles, and an airflow generating part that generates exhaust airflow, the exhaust unit exhausting the air near the fixing unit to the outside of the apparatus housing through the exhaust path; and an intake unit including an intake path through which air outside the apparatus housing can be taken in, a capturing part capable of capturing the ultrafine particles, and an airflow generating part that generates intake airflow, the intake unit taking the air outside the apparatus housing into the apparatus housing through the intake path. An intake port is provided below an exhaust port.