Hand Vacuum Pre-Motor Filter Layout for Sustained Airflow
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Solution Overview
Problem
Conventional surface cleaning apparatuses, such as hand vacuum cleaners, face a reduction in airflow and suction performance due to the clogging of pre-motor filters, which shortens their operational time and affects cleaning efficiency, especially when using HEPA filters.
Innovation Solution
A hand surface cleaning apparatus with a pre-motor filter having an enhanced surface area, configured to overlay parts of the suction motor and cyclone chamber, reduces dirt reaching the HEPA filter, extending the filter's life and maintaining airflow without increasing the device's size or weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a pre-motor filter is used to reduce dirt reaching the HEPA filter, then the life of the post motor filter is extended, but the pre-motor filter becomes clogged with use, reducing airflow and suction performance
Solution Approach 1:
The pre-motor filter is configured with an enhanced surface area that overlies the suction motor and/or cyclone chamber, effectively adding spatial dimensions to the filter structure. This dimensional expansion allows the filter to cover a larger area without increasing the overall device footprint, thereby extending filter life while maintaining airflow performance
2Duration of action of moving object
If the surface area of the pre-motor filter is increased to extend its lifetime, then the filter capacity is improved, but the size of the unit increases
Solution Approach 1:
The pre-motor filter is nested within the existing spatial configuration of the hand vacuum cleaner, overlaid upon the suction motor and/or cyclone chamber. This nesting arrangement allows the filter to achieve enhanced surface area while utilizing existing device volume, preventing any increase in overall unit size
Solution Approach 2:
The pre-motor filter serves multiple functions simultaneously: it filters air entering the motor, extends the life of the HEPA filter, and is configured to overlay existing components (suction motor and/or cyclone chamber) to maximize surface area without adding device volume
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 enhanced pre-motor filter design prolongs the operational time of the hand vacuum cleaner by reducing clogging and maintaining airflow, thereby enhancing cleaning performance and extending the life of downstream filters.
Implementation Method 1
a pre-motor filter with enhanced surface area transverse to the direction of air flow is provided
Implementation Method 2
The rotation of the air in the cyclone chamber results in some of the particulate matter in the airflow stream being disentrained from the airflow stream
Data Source
AI summary
A hand vacuum cleaner comprises an air flow passage extending from a dirty air inlet to a clean air outlet. A suction motor is positioned in the air flow path. At least one air treatment member, which is optionally a cyclone chamber, is positioned in the air flow path. A pre-motor filter is positioned in a pre-motor filter housing having an openable cover and the air treatment member air outlet axis extends through the pre-motor filter housing.