Multi-Element Filter Assembly for Compact Surface Cleaning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing surface cleaning apparatuses face challenges in maximizing the upstream surface area of filters without increasing their volume, leading to reduced air filtration capacity and shorter filter life due to clogged upstream surfaces and dirt penetration into the porous media.
Innovation Solution
The design incorporates a filter assembly with multiple individual filter elements mounted on a common support, featuring a larger upstream surface area than the porous filter media air outlets, and includes an air impermeable material to inhibit airflow bypass and promote dirt collection on exposed surfaces, thereby extending the filter's operational life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the upstream surface area of the filter is increased, then the air filtration capacity is improved, but the volume of the filter assembly increases
Solution Approach 1:
The filter elements are arranged with their upstream faces oriented in multiple directions (front, rear, and side faces), utilizing three-dimensional spatial arrangement to maximize the exposed upstream surface area within a compact volume. This dimensional approach allows the filter to present large filtration surfaces to airflow from multiple directions without requiring a proportionally large filter housing.
2Duration of action of stationary object
If the upstream surface area of the filter is increased, then the filter life is extended, but the device complexity increases
Solution Approach 1:
The filter assembly is divided into multiple discrete filter elements (first, second, and third filter elements) that can be independently arranged and configured. Each filter element presents upstream faces to different airflow directions, and the segmented structure allows for optimized dirt collection distribution while maintaining a manageable assembly configuration.
3Reliability
If air impermeable material is added to inhibit airflow bypass, then the filtration efficiency is improved, but the manufacturing complexity increases
Solution Approach 1:
Air impermeable material is applied selectively to specific portions of the filter assembly where airflow bypass is most likely to occur, rather than covering the entire filter structure. This localized application prevents unwanted airflow paths while minimizing the amount of additional material required and simplifying the manufacturing process compared to complete coverage.
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 enhances the filter's ability to collect dirt on the upstream surfaces, reducing pressure drops and dirt penetration into the porous media, allowing for longer operation and potentially smaller filter volumes with equivalent performance.
Implementation Method 1
each of the individual filter elements comprising porous filter material having at least one upstream face and at least one portion defining a porous filter media air outlet
Implementation Method 2
includes an air impermeable material to inhibit airflow bypass and promote dirt collection on exposed surfaces
Data Source
AI summary
A surface cleaning apparatus includes an air flow path, a filter housing, and a filter member in the filter housing. In some embodiments, the filter member includes a plurality of individual filter elements arranged in parallel, each including porous filter material having at least one upstream face and at least one portion defining a porous filter media air outlet. In other embodiments, the filter member has an outer upstream surface that abuts an axially extending air impermeable wall to inhibit bypass of the filter.