Multichannel Vacuum Nozzle for Fine Dust and Large Debris
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Solution Overview
Problem
Robotic vacuum cleaners face challenges in achieving high air flow rates and effectively removing diverse impurities due to limited power and space constraints, leading to inefficiencies in cleaning, particularly with large low-density objects and fine dust particles.
Innovation Solution
A design that supplies fast-flowing air from a spiral housing of a centrifugal fan directly to the floor surface using a convex transfer surface and a multichannel nozzle, connected to a rotary brush, which enhances air flow velocity and minimizes energy losses, allowing for efficient removal of both large and small impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a narrow joint is used between the suction nozzle and floor surface to achieve high flow rate, then the air flow rate improves, but it becomes difficult to remove large low-density objects such as dust tufts
Solution Approach 1:
The suction nozzle is divided into multiple channels (first suction channel for large particles, second suction channel for fine dust) that operate simultaneously. This segmentation allows each channel to be optimized for its specific particle type while working together to achieve both high flow rate and comprehensive cleaning capability.
Solution Approach 2:
The invention introduces a vertical dimension to the suction system by creating a multi-layered nozzle structure with channels at different heights and orientations. The first suction channel extends vertically to capture large particles, while the second channel provides horizontal flow for fine dust, effectively utilizing three-dimensional space to resolve the contradiction.
2Productivity
If the power input of the fan is increased to achieve higher negative static pressure and flow rate, then the cleaning efficiency improves, but the energy consumption increases significantly
Solution Approach 1:
The invention uses pneumatic principles by designing a multi-channel suction nozzle that utilizes air flow dynamics to efficiently capture particles of different sizes. The system optimizes air flow distribution across multiple channels to achieve effective cleaning with reduced fan power requirements, leveraging fluid mechanics rather than brute force power.
Solution Approach 2:
The invention changes the parameters of the suction system by creating multiple suction channels with different geometries and flow characteristics. This allows the system to operate at lower fan power levels while maintaining effective cleaning by distributing the suction load across multiple optimized pathways rather than relying on a single high-power channel.
3Device complexity
If a single suction nozzle design is used, then the device complexity is reduced, but it cannot effectively handle both large particles and fine dust simultaneously
Solution Approach 1:
The suction nozzle is segmented into multiple functional channels, each optimized for specific particle types. This segmentation increases cleaning effectiveness while keeping the overall device complexity manageable through modular design and integrated housing.
Solution Approach 2:
The multi-channel suction nozzle serves multiple functions simultaneously: capturing large particles through the first suction channel, capturing fine dust through the second suction channel, and maintaining high air flow rates. This universal design consolidates what could be separate devices into a single integrated component.
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
This solution achieves higher air flow rates and improved cleaning efficiency by maintaining a thin high-velocity air layer close to the floor, effectively removing fine dust and large particles while reducing energy consumption and preventing air leakage, thus enhancing the overall cleaning performance of robotic vacuum cleaners.
Implementation Method 1
spiral housing of a centrifugal fan
Implementation Method 2
an important assumption is the need to reduce the thickness of the boundary layer at the floor surface
Implementation Method 3
supply fast-flowing air from a spiral housing of a centrifugal fan directly to the floor surface
Data Source
AI summary
A cleaning device comprising a convex transfer surface disposed between a flat nozzle and a rotary brush. The flat nozzle is formed as a multichannel nozzle between the convex transfer surface and the apron with the bevel of the mouth of the multichannel nozzle ranging from 20 to 60 degrees from the horizontal plane. The clearance height between the convex transfer surface and the floor is preferably in the range of 1 to 8 millimetres.