Cyclone Bin Chamber Layout for Fine Dust Re-Entrapment Control
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Solution Overview
Problem
Current cyclone bin assemblies in surface cleaning apparatuses face challenges in effectively disentangling finer particulate matter from the air stream, leading to re-entrainment and reduced efficiency in dirt collection.
Innovation Solution
The cyclone bin assembly incorporates a diverter wall and asymmetric dirt outlet configuration, which separates the dirt collection chamber into two portions, accelerating airflow and directing it in a way that enhances the disentanglement of finer particles, reducing re-entrainment by creating a wind shadow for particle settlement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air circulates in a single undivided dirt collection chamber, then the chamber structure is simple, but finer particulate matter is not effectively disentangled and re-entrainment occurs
Solution Approach 1:
The dirt collection chamber is divided into a first portion and a second portion by a divider wall. The first portion receives air from the cyclone chamber and the second portion receives air from the first portion. This segmentation allows different regions of the chamber to perform different functions, improving disentanglement efficiency for finer particles while maintaining a relatively simple overall structure.
Solution Approach 2:
The divider wall is positioned asymmetrically within the dirt collection chamber, creating unequal portions. The first portion has a larger volume to handle the main airflow from the cyclone, while the second portion is smaller and optimized for final particle settlement. This asymmetric configuration optimizes the airflow pattern and particle separation efficiency.
2Productivity
If the dirt collection chamber is divided into two portions with a divider wall, then finer particulate matter is more effectively disentangled, but the chamber structure becomes more complex
Solution Approach 1:
The chamber is segmented into two functional portions separated by a divider wall with an opening. This segmentation creates distinct airflow zones that improve dirt collection efficiency by preventing re-entrainment of fine particles, while the shared opening maintains structural simplicity.
Solution Approach 2:
The divider wall acts as an intermediary structure between the two portions of the chamber. It provides structural separation to improve efficiency while its opening allows airflow continuity, mediating between the need for separation and the need for simple structure.
3Reliability
If air flows directly from the cyclone chamber to the outlet, then the airflow path is short, but finer particles are not adequately separated
Solution Approach 1:
The airflow path is segmented into two stages: first through the first portion of the chamber, then through the second portion. This multi-stage flow path increases the residence time and distance over which particles are separated, improving reliability of particle separation without excessively lengthening the overall path.
4Reliability
If a divider wall is added to create a wind shadow for particle settlement, then re-entrainment is reduced, but the device complexity increases
Solution Approach 1:
The divider wall is positioned asymmetrically to create an optimal wind shadow zone in the second portion of the chamber. This asymmetric placement generates a protected region where fine particles can settle without being re-entrained by the main airflow, improving reliability while adding minimal structural complexity.
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 configuration increases the percentage of finer particulate matter disentangled from the air stream, improving the dirt collection efficiency and reducing re-entrainment, thereby enhancing the overall cleaning performance.
Implementation Method 1
The rotation of the air in the cyclone results in some of the particulate matter in the airflow stream being disentrained from the airflow stream
Implementation Method 2
The rotation of the air in the cyclone results in some of the particulate matter in the airflow stream being disentrained from the airflow stream
Implementation Method 3
the divider wall may direct air away from the surface on which particulate matter has accumulates and thereby provide a wind shadow in which light particulate matter may settle
Data Source
AI summary
A cyclone bin assembly comprises a dirt collection chamber in communication with a dirt outlet of a cyclone chamber. The dirt collection chamber comprises a first and second opposed ends and comprises a first and portions. The dirt outlet is positioned adjacent the second opposed end of the dirt collection chamber. The first and second portions may comprise discrete chambers that are separated from each other by a passage extending between the dirt outlet and a wall of the dirt collection chamber. The first and second portions may have first and second sides. The first side is positioned adjacent the passage and the second side is angularly spaced from the passage. The second portion has a divider wall that extends towards the second opposed end of the dirt collection chamber from the first opposed end of the dirt collection chamber. The divider wall may be spaced from the second side.