Segmented Ground Brush Air Inlets for Quieter Dust Pickup
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Solution Overview
Problem
Existing cleaning appliances face a trade-off between dust cleaning ability and noise levels, where increasing air flow velocity improves dust cleaning but increases noise, and reducing velocity decreases noise but compromises dust cleaning performance.
Innovation Solution
A ground brush design with an obliquely arranged front dust collection strip and optimized air channel structure, including symmetrically arranged front and side air inlets, reduces noise while enhancing dust cleaning ability, and is simpler and more cost-effective than traditional noise reduction methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the velocity of air flow entering the ground brush is increased to improve dust cleaning ability, then dust cleaning ability is improved, but air-operated noise becomes louder
Solution Approach 1:
The air inlet is divided into multiple segments: a front air inlet and side air inlets. The front air inlet has a smaller cross-sectional area to reduce air-operated noise, while the side air inlets provide additional air intake to maintain sufficient air flow velocity for dust cleaning. This segmentation allows independent optimization of noise reduction and cleaning performance.
Solution Approach 2:
The ground brush body is designed with asymmetric air inlet distribution, where the front air inlet area is intentionally made smaller than what would be required for maximum cleaning performance, while compensating with side air inlets. This asymmetric design creates a non-uniform air flow distribution that reduces noise while maintaining cleaning effectiveness.
2Object-generated harmful factors
If the velocity of air flow is reduced to decrease air-operated noise, then noise becomes lower, but dust cleaning ability becomes poor
Solution Approach 1:
The air inlet system is segmented into front and side components with different functions. The front air inlet is optimized for noise reduction with smaller area, while side air inlets compensate for the reduced air flow to maintain sufficient velocity for dust pickup, ensuring cleaning performance is not compromised.
Solution Approach 2:
Different parts of the air inlet system have different design characteristics tailored to their specific functions. The front air inlet prioritizes noise reduction with smaller cross-sectional area, while side air inlets prioritize air flow volume to maintain cleaning performance. This local quality differentiation resolves the overall contradiction.
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 effectively improves dust cleaning ability by 2% and reduces noise by 6 dB compared to standard models, while maintaining a simplified structure and lower costs.
Implementation Method 1
the front dust collection strip is obliquely arranged relative to the normal direction of the surface to be cleaned, the air channel of the ground brush for a cleaning appliance is optimized, the flowing condition of the air flow in the ground brush for a cleaning appliance is improved
Implementation Method 2
a cleaning appliance such as a vacuum cleaner is a household appliance that can generate negative pressure to suck dirt such as dusts and hairs
Data Source
AI summary
A ground brush for a cleaning appliance and a cleaning appliance with the same are provided. The ground brush includes: a body and a front dust collection strip. The body defines an air channel therein, a bottom plate of the body defines a suction port in communication with the air channel, and a rear side of the body defines an exhaust port. When the body covers a surface to be cleaned, an airtight space is defined between the air channel and the surface to be cleaned. The front dust collection strip is arranged at a front end of the body to support the ground brush for a cleaning appliance on the surface to be cleaned, defines a plurality of front air inlets in communication with the air channel, and is incline relative to a normal direction of the surface to be cleaned.