Cleaner Head Dust Channel for Low-Energy Debris Pickup
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Solution Overview
Problem
Vacuum cleaners face inefficiencies in capturing energized dust particles due to their tangential entry into the cleaner head, leading to re-deposition on the carpet as these particles collide with the chamber walls, requiring high air flow rates to re-entrain them, which increases energy consumption.
Innovation Solution
A dust channel is introduced between the agitator chamber and the exhaust port to retain energized debris until its energy decreases, using one-way valves or baffles to prevent re-deposition and facilitate entrainment within the air flow, allowing for a lower air flow rate while maintaining pick-up performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air flow rate is increased to re-entrain energized dust particles that collide with chamber walls, then debris pick-up performance is improved, but energy consumption increases
Solution Approach 1:
A dust channel is introduced as an intermediary component between the brush bar chamber and the exhaust port. This dust channel provides a dedicated pathway that guides energized dust particles from the brush bar chamber to the exhaust port, preventing them from colliding with the cleaner head walls and being re-deposited on the carpet. The dust channel acts as a mediator that resolves the contradiction by enabling effective debris removal without requiring high air flow rates.
2Volume of moving object
If the exhaust port is located above the brush bar chamber to accommodate compact design, then the vacuum cleaner size is reduced, but energized dust particles cannot be efficiently swept through the exhaust port and require multiple collisions
Solution Approach 1:
The dust channel extends in a direction that bypasses the spatial constraint of the exhaust port location. By creating a three-dimensional pathway that connects the brush bar chamber to the exhaust port through the cleaner head structure, the design allows energized dust particles to be efficiently transported to the exhaust port regardless of its position above the brush bar chamber, thus maintaining both compact size and effective debris removal.
3Ease of operation
If the brush bar rotates to sweep debris from front to rear, then carpet fibers are agitated effectively, but energized dust particles enter the brush bar chamber tangentially and collide with walls causing re-deposition
Solution Approach 1:
The cleaner head is segmented into distinct functional zones: the brush bar chamber for agitation, the dust channel for particle transport, and the exhaust port for ejection. This segmentation allows the brush bar to rotate and agitate carpet fibers effectively while the dust channel provides a separate, dedicated pathway that prevents energized dust particles from colliding with chamber walls and being re-deposited, thus resolving the harmful effect of re-deposition.
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 design enables comparable debris pick-up performance to larger motor-driven vacuum cleaners with lower energy consumption by retaining energized debris until it can be entrained within the air flow, reducing re-deposition and energy requirements.
Implementation Method 1
the dust channel comprises means for retaining energized debris within the dust channel until the energy of the energized debris has decreased to a level which enables the energized debris to become entrained within the air flow
Implementation Method 2
a fan unit for generating an air flow which passes from the cleaner head to the fan unit
Implementation Method 3
until the energy of the energized debris has decreased to a level which enables the energized debris to become entrained within the air flow
Data Source
AI summary
A cleaner head is described for use with a vacuum cleaning appliance including a fan unit for generating an air flow which passes from the cleaner head to the fan unit. The cleaner head includes a rotatable agitator assembly including an agitator for sweeping dust particles. The agitator assembly is housed in an agitator chamber housing including a downwardly-directed opening through which dust particles energized by the agitator enter the cleaner head, and a dust outlet located adjacent the opening and through which the energized particles leave the agitator chamber. The cleaner head also includes an exhaust port from which a dust-bearing air flow is drawn from the cleaner head, and a dust channel extending between the dust outlet and the exhaust port. The dust channel has channel walls which are shaped to retain energized dust particles therebetween through collisions thereagainst.