Vacuum Suction Port Rib Structure for Brush Dust Shedding and Noise Control
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Solution Overview
Problem
Conventional vacuum cleaners face challenges in reducing noise emission and maintaining effective dust removal due to dust accumulation on drum brushes, which reduces suction force and increases noise transfer from the cleaner main body to the suction port assembly.
Innovation Solution
A suction port assembly with a rotatable drum brush and a rib structure that contacts the bristles at an angle, preventing the drum brush from rotating when pulled and enhancing dust detachment, while the rib absorbs noise by occupying the space between the casing and drum brush, reducing noise emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the drum brush rotates freely in both directions, then the brush can adapt to pushing and pulling motions, but dust accumulates on the bristles and suction force is reduced
Solution Approach 1:
The patent applies asymmetry by configuring the bristles at an angled orientation relative to the drum brush surface. This asymmetric arrangement causes the bristles to effectively engage with the floor during pushing motion (when the brush rotates forward) while minimizing dust accumulation during pulling motion, as the angled bristles naturally shed dust backward. This resolves the contradiction by making the brush directional in its dust removal function while maintaining adaptability to bidirectional user motion.
Solution Approach 2:
The patent inverts the conventional approach by preventing drum brush rotation during pulling motion rather than allowing free rotation in both directions. The angled bristle configuration creates resistance to backward rotation, effectively making the brush non-rotating during pull operations. This inversion ensures that dust removal occurs primarily during pushing motion when the brush rotates forward, maintaining productivity while adapting to bidirectional use through selective rotation control.
2Productivity
If the drum brush rotates continuously, then dust can be swept off the surface, but noise is emitted through the suction port to the user
Solution Approach 1:
The patent implements periodic action by enabling the drum brush to rotate only during pushing motion and remain stationary during pulling motion. This creates a periodic rotation pattern rather than continuous rotation, where the brush rotates forward during push operations to sweep dust, then stops during pull operations. This periodic operation reduces the duration of noise emission while maintaining effective dust sweeping during the active rotation phases, thereby resolving the contradiction between productivity and noise reduction.
3Productivity
If comb-shaped plates are mounted to detach dust from bristles, then dust removal is improved, but noise flows back from the motor to the suction port
Solution Approach 1:
The patent replaces the symmetric comb-shaped plate structure with angled bristles mounted on the drum brush surface. This asymmetric configuration serves dual functions: the angled orientation effectively detaches dust from the bristles during rotation while simultaneously acting as a noise barrier. The angled structure blocks the noise path from the motor to the suction port opening, preventing noise flowback while maintaining dust detachment capability, thus resolving the contradiction between productivity improvement and noise reduction.
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 solution improves dust removal efficiency and reduces noise emission by ensuring the drum brush only rotates when pushed, maintaining effective suction force and minimizing noise transfer to the user.
Implementation Method 1
a rib which is disposed at a position close to the drum brush, is mounted in the casing so that its one end is in contact with the bristles, and detaches the dust from the bristles when the drum brush rotates; and wherein the bristles are contacted on a slant relative to the rib to prevent the drum brush from rotating when the casing is pulled towards a user
Implementation Method 2
the rib absorbs noise by occupying the space between the casing and drum brush, reducing noise emission
Data Source
AI summary
A suction port assembly and vacuum cleaner having the same is disclosed. The suction port assembly includes a casing comprising a suction port which draws in dust from a surface being cleaned; a drum brush which is disposed rotatably in the casing, on an external surface of which a plurality of bristles are arranged to shake off dust from the surface being cleaned; and a rib which is disposed at a position close to the drum brush, is mounted in the casing so that its one end is in contact with the bristles, and detaches the dust from the bristles when the drum brush rotates; and wherein the bristles are contacted on a slant relative to the rib to prevent the drum brush from rotating when the casing is pulled towards a user.