Floor Cleaner Outlet Channeling for Low-Noise Suction Airflow
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Solution Overview
Problem
Conventional floor cleaning apparatuses are noisy due to motor and impeller operation, induce vibrations, and have imperfect cleaning in central areas, along with inadequate roller load regulation leading to rapid wear.
Innovation Solution
A floor cleaning apparatus with a suction unit, inlet, and outlet channeling units featuring expansion and compression chambers to reduce noise and improve cleaning efficiency, including a unique outlet channeling unit with intercepting walls and annular flow volumes to manage airflow and a reliable roller connection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the rotational speed of the impeller is reduced to decrease noise, then noise level is reduced, but suction performance deteriorates
Solution Approach 1:
The outlet channeling unit is divided into multiple expansion chambers (first, second, third expansion chambers) connected by compression channels. This segmentation allows the airflow to be processed in stages, with each chamber contributing to noise reduction while maintaining overall suction performance through the cumulative effect of multiple expansion-compression cycles.
Solution Approach 2:
The airflow undergoes periodic expansion and compression as it passes through the alternating expansion chambers and compression channels. This periodic action creates a pulsating flow pattern that reduces noise through acoustic cancellation effects while maintaining the energy required for effective suction.
2Productivity
If cleaning rollers are used to improve cleaning coverage, then cleaning performance is improved, but load regulation is inadequate leading to rapid wear
Solution Approach 1:
The cleaning assembly is designed with dynamic load regulation that allows the cleaning rollers to automatically adjust their contact pressure with the floor surface based on operational conditions. This dynamic adjustment prevents excessive load that would cause rapid wear while ensuring sufficient contact for effective cleaning across the entire width including central areas.
3Device complexity
If cleaning discs are used to simplify the cleaning mechanism, then device complexity is reduced, but cleaning action in central area is imperfect
Solution Approach 1:
The cleaning assembly is segmented into multiple cleaning elements (cleaning discs and/or cleaning rollers) arranged in zones, with specific attention to the central area. This segmentation allows different cleaning elements to target different regions, ensuring effective cleaning in the central area while maintaining overall system simplicity.
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 effectively reduces noise, enhances cleaning performance, and extends the lifespan of cleaning rollers by improving load regulation and ease of assembly.
Implementation Method 1
The outlet channeling unit (30) includes a first expansion chamber (31), a second expansion chamber (32), a first compression channel (33), a third expansion chamber (34), and a second compression channel (35)
Data Source
AI summary
A floor cleaning apparatus (1) has an air suction unit (10) and an outlet channeling unit (30), which connects an outlet side of the suction unit (10) to an exhaust aperture (40). The air outlet channeling unit (30) includes various expansion chambers (31, 32, 34, 39) and respective air compression channels interposed among the expansion chambers. At the first expansion chamber (31) an intercepting wall (100) with through holes (101) may be present.