Cyclonic Dirt Cup Layout for Shorter Vacuum Airflow Paths
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Solution Overview
Problem
Existing suction cleaners with cyclonic dirt separation face inefficiencies due to long air paths and potential air leaks, which negatively impact cleaning performance, as the motor/fan assembly is often placed at the bottom of the handle, creating a tortuous air path that reduces airflow efficiency.
Innovation Solution
A vacuum cleaner design featuring a primary cyclonic airflow chamber with multiple secondary cyclones arranged in parallel, oriented perpendicular to the primary cyclone, and a dirt-collecting bin with airflow inhibitors like fingers and fins to reduce vertical airflow components, enhancing dirt separation and agglomeration within a cyclonic dirt cup assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the motor/fan assembly is placed at the bottom of the handle below the cyclone separator, then weight is reduced, but the air path becomes long and tortuous causing air leaks and reduced airflow efficiency
Solution Approach 1:
The patent repositions the motor/fan assembly from a vertical arrangement (bottom of handle) to a horizontal arrangement adjacent to the cyclone separator. This dimensional change creates a direct, short air path from the cyclone outlet to the motor inlet, eliminating the long tortuous path that caused air leaks and efficiency losses, while maintaining weight reduction benefits.
2Device complexity
If a single primary cyclone separator is used, then the device complexity is low, but the dirt separation efficiency is insufficient
Solution Approach 1:
The patent divides the dirt separation process into multiple stages by incorporating both a primary cyclone separator and a secondary cyclone separator in series. The primary separator handles bulk dirt removal while the secondary separator captures finer particles, achieving high separation efficiency without excessive complexity through functional segmentation.
Solution Approach 2:
The patent positions the secondary cyclone separator within or adjacent to the primary cyclone separator structure, creating a nested arrangement where the secondary separator is integrated into the overall separator assembly. This nesting approach maximizes space utilization and maintains compact design while providing multi-stage separation capability.
3Productivity
If multiple secondary cyclones are added in parallel, then the dirt separation efficiency improves, but the device complexity increases
Solution Approach 1:
The patent uses a single secondary cyclone separator rather than multiple parallel units, segmenting the separation function into primary and secondary stages instead of using multiple identical units in parallel. This approach achieves enhanced separation efficiency through sequential processing while maintaining simpler overall device 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 design improves airflow efficiency by minimizing air leaks and re-entrainment, effectively separating and collecting dirt, leading to enhanced cleaning performance and reduced backpressure.
Implementation Method 1
a housing defining a first cyclonic airflow chamber for separating contaminants from a dirt-containing air stream as it travels around a cyclonic axis in the first cyclonic airflow chamber
Implementation Method 2
separating contaminants from a dirt-containing air stream as it travels around a cyclonic axis
Implementation Method 3
At least one secondary cyclone has an inlet opening in fluid communication with the first cyclonic airflow chamber outlet and a debris outlet in communication with a secondary debris collector. The secondary cyclone has a cyclonic axis that is oriented substantially perpendicular to the cyclonic axis of the first cyclonic airflow chamber.
Data Source
AI summary
A vacuum cleaner with a first cyclonic dirt separation and a secondary cyclonic dirt separation and a bottom dirt-collecting bin beneath the first cyclone separator and a filter beneath the dirt cup and between the dirt cup and a suction source inlet. The secondary cyclones oriented generally perpendicular to the first cyclone separator. A separator plate separates the cyclone separator from the dirt cup. Fins project from a sidewall of the dirt tank, and fingers projecting from a bottom wall of the dirt tank. A hollow standpipe in the dirt cup transports working air from the cyclone separator outlet to the filter.