Suction Nozzle Geometry for Low-Power Vacuuming on Tiled Floors
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Solution Overview
Problem
Suction nozzles designed for high-power suction devices fail to maintain effective suction properties when used with low-power suction fans, particularly on tiled floor surfaces with joints, leading to poor dirt particle collection.
Innovation Solution
A suction nozzle with a narrower working width, a sealed suction chamber, and strategically designed flow openings under the sealing elements to maintain suction pressure and airflow, ensuring efficient dirt particle collection even with low-power suction devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suction nozzle designed for high-power suction devices is used with low-power suction fans, then the suction properties deteriorate significantly, but reducing the nozzle design power requirement limits the effectiveness on tiled floor surfaces
Solution Approach 1:
The patent changes the geometric parameters of the suction mouth and suction chamber to optimize performance for low-power devices. Specifically, the suction mouth width is reduced to 200-280 mm and the suction chamber height is increased to at least 4 mm, creating a configuration that maintains effective suction with fans consuming less than 900 W while still performing well on tiled surfaces
2Stress or pressure
If the suction mouth width is increased to improve coverage area, then the suction pressure decreases, but reducing the width improves suction pressure yet reduces the cleaning efficiency
Solution Approach 1:
The patent optimizes the suction mouth width to a specific range of 200-280 mm, which balances the trade-off between coverage area and suction pressure. This parameter optimization ensures sufficient suction pressure for effective particle pickup while maintaining an adequate cleaning width for practical use
3Productivity
If sealing elements are positioned closer to reduce the suction chamber volume, then the suction efficiency decreases, but increasing the distance improves suction yet increases the device complexity
Solution Approach 1:
The patent specifies an optimal distance range of 15-50 mm between sealing elements, which creates sufficient suction chamber volume for effective particle pickup while avoiding excessive device complexity. This parameter optimization maintains good suction efficiency without requiring overly complex sealing arrangements
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 suction nozzle effectively picks up fine dirt particles and maintains suction performance on tiled floors with low-power suction devices, ensuring effective dirt transport and vacuuming efficiency.
Implementation Method 1
a suction device (20) with a suction fan (21) is connected to the suction channel (3)
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a suction nozzle for vacuuming smooth floors, in particular tiled floor surfaces, with a nozzle body (1) which has a suction mouth (2) and a suction channel (3) on its underside for the discharge of a suction air flow, with sealing elements (4, 4 ), which are arranged in front of and behind the suction mouth (2) in the working direction, and with lateral suction space limitations (5) at the ends of the suction mouth (2), the suction mouth (2), the sealing elements (4, 4) and the lateral Suction space limitations (5) delimit a suction space (6) on the underside of the nozzle body (1). The suction mouth (2) has a width (B) measured transversely to the working direction between 200 mm and 280 mm. The height of the suction chamber (6), measured from the lower edge of the sealing elements (4, 4) to the inner surface of the suction mouth (2), is outside a mouth area (7) of the suction channel (3) at least in end-side suction mouth sections (L), which are each extend from one end of the suction mouth (2) over a length of 60 mm, at least 1 mm and at most 20 mm. The distance (x) between the front sealing element (4) and the rear sealing element (4) is at least 15 mm and at most 50 mm. Furthermore, flow openings on the bottom side between the front sealing element (4) and a flat bottom surface and flow openings on the bottom side between the rear sealing element (4) and a flat bottom surface each have a total cross section of less than 200 mm2, preferably less than 150 mm2.