V-Shaped Front Scraping Member for Vacuum Nozzle Large Waste Suction
Solution Overview
Problem
Existing vacuum cleaner nozzles face inefficiencies in suctioning large waste due to accumulation at the central passage opening, which impairs suction efficiency and makes it difficult to reach waste along walls or plinths, while widening the passage opening compromises suction of small debris like dust.
Innovation Solution
A vacuum cleaner nozzle with scraping branches inclined at 165° to 178° to guide large waste towards the central passage opening, reducing accumulation and frontal bulk, and featuring lateral passage openings to minimize pressure losses and turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the central passage opening is widened to prevent accumulation of large waste, then the suction of large waste is improved, but suction losses occur which are detrimental for the suction of very small waste such as dust or flour
Solution Approach 1:
The front scraping member is divided into multiple scraping branches (first scraping branch, second scraping branch, and optionally third scraping branch) that create multiple passage openings (central passage opening and lateral passage openings). This segmentation allows different openings to handle different sizes of waste particles, with lateral openings preventing accumulation of large waste while the central opening maintains appropriate dimensions to avoid suction losses for small particles.
2Productivity
If the first and second scraping branches are inclined at approximately 135° to channel large waste rapidly towards the central passage opening, then the suction of large waste is improved, but waste accumulation occurs at the central passage opening which impairs suction efficiency
Solution Approach 1:
The front scraping member is divided into multiple scraping branches (first scraping branch, second scraping branch, and optionally third scraping branch) that create multiple passage openings (central passage opening and lateral passage openings). This segmentation allows different openings to handle different sizes of waste particles, with lateral openings preventing accumulation of large waste while the central opening maintains appropriate dimensions to avoid suction losses for small particles.
3Productivity
If the first and second directions of extension are inclined at approximately 135° to guide waste towards the central passage opening, then large waste suction is improved, but the vacuum cleaner nozzle acquires a large frontal bulk making it difficult to suck waste located along a wall or plinth
Solution Approach 1:
The angle of inclination between the first and second directions of extension is changed from the conventional approximately 135° to a narrower angle between 150° and 180°. This parameter change reduces the frontal bulk of the vacuum cleaner nozzle, improving ease of operation and access to waste along walls and plinths, while the presence of lateral passage openings ensures that large waste is still effectively channeled without accumulation.
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
Effectively suctions large waste like grains of rice or lentils without accumulating at the central passage opening, while maintaining efficient suction of small debris and allowing access to waste along walls or plinths.
Implementation Method 1
the front scraping member and its scraping branches are configured to orient waste, coming into contact against the front scraping member during a forward movement of the vacuum cleaner nozzle, towards the central passage opening
Implementation Method 2
channel large waste, coming into contact against the front scraping member during a forward movement of the vacuum cleaner nozzle, towards the central passage opening
Implementation Method 3
a suction channel emerging into the lower face of the sole... allow a suction of waste through the central passage opening and towards the suction channel
Data Source
AI summary
A vacuum cleaner nozzle includes a sole provided with a lower face and a suction channel emerging into the lower face; and a front scraping member located at the front of a front edge of the suction channel and delimiting at least in part a central passage opening which is fluidly connected to the suction channel. The front scraping member generally has a V shape having an apex oriented towards a central part of the suction channel, the front scraping member including a first scraping branch extending in a first direction of extension and a second scraping branch extending in a second direction of extension, the first and second scraping branches being configured to orient waste, coming into contact against the front scraping member during a forward movement of the vacuum cleaner nozzle towards the central passage opening.