Hand Vacuum Cyclone Filter Layout for Lower Backpressure
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Solution Overview
Problem
Existing hand vacuum cleaners often have ergonomic issues due to the placement of components, leading to suboptimal hand feel and airflow efficiency, particularly with cyclonic cleaning stages that can result in backpressure and reduced performance over time due to clogged pre-motor filters.
Innovation Solution
A hand vacuum cleaner design where the suction motor is positioned forward of the handle, with a cyclone unit and pre-motor filter configuration that allows air to flow through a longitudinally extending porous filter media, intersecting the suction motor axis, and featuring a handle with batteries for improved ergonomics and airflow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the suction motor is positioned in the handle for compact design, then device complexity is reduced, but airflow efficiency deteriorates due to restricted air flow path
Solution Approach 1:
The air flow path is extended in the longitudinal dimension of the device by positioning the cyclone unit forward of the handle and the pre-motor filter between the cyclone unit and suction motor, creating a longer air flow path that improves airflow efficiency without increasing device complexity
2Manufacturing precision
If the pre-motor filter is positioned downstream of the cyclone unit, then manufacturing precision is improved, but backpressure increases reducing performance over time
Solution Approach 1:
The pre-motor filter is positioned upstream in the air flow path between the cyclone unit and suction motor to perform preliminary filtration of air before it reaches the motor, reducing backpressure and preventing performance degradation over time
3Device complexity
If the cyclone unit is positioned rearward for compact design, then device complexity is reduced, but airflow efficiency deteriorates due to restricted air flow path
Solution Approach 1:
The cyclone unit is positioned forward of the handle in the longitudinal dimension, creating sufficient space for an extended air flow path that connects the cyclone unit to the suction motor through the pre-motor filter, thereby improving airflow efficiency while maintaining compact 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
The design enhances ergonomics, improves hand feel, reduces backpressure, and extends the duration of use without significant airflow reduction by providing a large upstream filter surface and efficient air flow path.
Implementation Method 1
a suction motor and fan assembly
Implementation Method 2
a cyclone unit comprising a cyclone chamber having a cyclone air inlet, a cyclone air outlet
Implementation Method 3
cyclonic cleaning stage
Implementation Method 4
a porous pre-motor filter media positioned so that a rear end of the suction motor is forward of the pre-motor filter media
Implementation Method 5
porous pre-motor filter media providing a large upstream filter surface
Data Source
AI summary
A surface cleaning apparatus has a cyclone chamber provided in an air flow path. The cyclone chamber has a screen assembly with an outlet section, a longitudinally spaced apart distal section and a longitudinally extending porous section. The outlet section includes a non-porous member extending longitudinally inwardly an outlet section length from an outlet end of the outlet section to a longitudinally inwardly positioned inlet end of the outlet section. The outlet end of the outlet section overlies a cyclone air outlet. The porous section extends longitudinally inwardly from an outlet end of the porous section that is located at the inlet end of the outlet section. The outlet section length is at least as long as the cyclone outlet port length.