Multi-Strut Cleaning Head With Redundant Airflow Passages
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Solution Overview
Problem
Conventional surface cleaning apparatuses face issues with airflow passage blockages, which can render the cleaning head inoperable, and require structural housings that increase weight and material costs, while limiting user visibility and suction efficiency.
Innovation Solution
A cleaning head design featuring a plurality of struts with airflow passages between the front and rear portions, allowing for multiple airflow paths and an open area for visibility, reducing back pressure, and enabling operation even if one passage is blocked, without a structural housing, thus providing improved suction distribution and user visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single airflow passage is used in conventional cleaning heads, then the structure is simpler, but the system becomes inoperable if the passage is blocked and the back pressure increases
Solution Approach 1:
The single airflow passage is divided into multiple separate airflow passages (first, second, third passages) within the cleaning head. Each passage operates independently, allowing the system to maintain functionality even if one passage becomes blocked. This segmentation directly resolves the contradiction by improving reliability through redundancy while managing device complexity through systematic design.
2Reliability
If a structural housing is used to enclose airflow passages, then the passages are protected, but the weight and material costs increase
Solution Approach 1:
The traditional enclosing housing structure is removed entirely. Instead of protecting passages with a surrounding housing, the passages are integrated directly into the cleaning head body structure. This extraction of the housing element eliminates unnecessary weight and material costs while maintaining passage functionality through the integrated design.
3Reliability
If a structural housing encloses the airflow passages, then the passages are protected, but user visibility of the cleaning surface is limited
Solution Approach 1:
The enclosing housing that obstructed the user's view of the cleaning surface is completely removed. The airflow passages are exposed and integrated into the cleaning head structure, allowing unobstructed visibility of the surface being cleaned while the passages remain functional and protected through their integrated design.
4Productivity
If a single airflow passage is used, then the device structure is simpler, but the suction efficiency is reduced due to limited cross-sectional area
Solution Approach 1:
The single airflow passage is segmented into multiple parallel passages (first, second, third passages) with different cross-sectional areas. This segmentation increases the cumulative cross-sectional area available for airflow, thereby improving suction efficiency and productivity. The multiple passages work simultaneously to move greater volumes of air and debris through the cleaning head.
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 ensures continued operation if an airflow passage is blocked, reduces material costs and weight, enhances suction efficiency by increasing the cumulative cross-sectional area, and allows users to monitor the cleaning process through visible open areas.
Implementation Method 1
Fluid communication between the front portion and the rear portion is provided by an airflow passage
Data Source
AI summary
A cleaning head for a surface cleaning apparatus has a plurality of struts extending from a front chamber having a dirty air inlet to a rear chamber having a transition duct that is in communication with a filtration apparatus of a surface cleaning apparatus by a dirty fluid outlet. One or more of the struts comprises an airflow passage. In one embodiment, no outer casing is provided surrounding the struts.