Vacuum Cleaner Nozzle Sealing Edge for Stable Suction on Uneven Surfaces
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Solution Overview
Problem
Vacuum cleaner nozzles with multiple joints face issues on uneven surfaces, causing uncomfortable pressure drops and vibrations due to sudden suction changes, which affect dust removal efficiency and user experience.
Innovation Solution
A nozzle design with a suction plate featuring a sealing edge arrangement where the air duct end portion is constantly flared or straight in the vertical direction, allowing the moulding tool to be inserted from the underside, simplifying manufacturing and reducing the need for large openings, while maintaining controlled pressure and improved dust removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protrusion is added to the air duct wall to form a secondary sealing edge, then under pressure control is improved and dust removal ability increases, but manufacturing complexity increases and requires large openings in the air duct
Solution Approach 1:
The patent combines the protrusion structure with the air duct wall itself, making the secondary sealing edge an integral part of the air duct rather than a separate component. This merging eliminates the need for separate protrusion attachments while maintaining the under pressure control function.
Solution Approach 2:
Instead of adding a protrusion that extends into the air duct space (which would require large openings for tool access), the invention inverts the approach by forming the secondary sealing edge as a recess or groove in the air duct wall. This allows moulding tools to access the sealing edge from the exterior without requiring large openings in the air duct.
2Adaptability or versatility
If multiple joints are used in the connection between nozzle outlet and extension tube, then performance on uneven and soft surfaces is improved, but sudden pressure drops and vibrations occur due to movement
Solution Approach 1:
The patent applies beforehand cushioning by providing a secondary sealing edge that gradually reduces the sealing contact with the surface. This gradual transition cushions the sudden pressure drops that occur when the nozzle moves or tilts on uneven surfaces, preventing abrupt suction changes and vibrations.
Solution Approach 2:
The invention changes the sealing parameter by introducing a secondary sealing edge with different geometric parameters than the primary sealing edge. The secondary edge has a smaller contact area and different orientation, which modifies the sealing characteristics to reduce sensitivity to nozzle movement and surface irregularities.
Data Source
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AI summary
The present disclosure relates to a nozzle for a vacuum cleaner. The nozzle comprises a suction plate (7) which comprises an air duct (12) having a vertical end portion (3) arranged to extend towards a suction opening. The suction plate comprises a sealing edge (18) extending along at least a portion of the suction opening, wherein a first portion (5a) of the sealing edge is arranged to be displaced in a natural movement direction (20) of the nozzle with respect to a second portion (6a) of the sealing edge. Further, the end portion of the air duct is arranged to be constantly flared and/or straight in the vertical direction towards and up to the first portion of the sealing edge and the second portion of the sealing edge. The present configuration of the suction plate facilitates manufacturing of the nozzle.