Suction Nozzle Flow Opening Adjustment for Hard Floor Versatility
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Solution Overview
Problem
Suction nozzles used with low-performance vacuum devices struggle to maintain effective suction properties on both smooth and uneven hard floor surfaces, particularly when dealing with dry, finely divided dirt particles.
Innovation Solution
A suction nozzle with a shielding device that adjusts the free flow cross-section of the throughflow openings between two functional positions, allowing for optimized airflow and dirt particle collection on different floor types, ensuring efficient suction even with low-power suction fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the total free flow cross-section of the flow openings is kept large for vacuuming smooth hard floor surfaces, then dust pickup performance is improved, but suction performance deteriorates on uneven hard floors and tiled floors with grout lines
Solution Approach 1:
The suction nozzle incorporates a shielding device that can be switched between two functional positions to dynamically adjust the total free flow cross-section of the flow openings. In the first position, the cross-section is larger (suitable for smooth floors), and in the second position, it is smaller (suitable for uneven floors and tiled floors). This dynamic adjustment allows the nozzle to adapt to different floor types and maintain optimal suction performance across various surfaces.
2Adaptability or versatility
If the total free flow cross-section of the flow openings is reduced for vacuuming uneven hard floors and tiled floors, then suction performance on these surfaces is improved, but dust pickup performance on smooth hard floor surfaces deteriorates
Solution Approach 1:
The shielding device enables dynamic adjustment of the flow opening cross-section. When switching to the second functional position, the total free flow cross-section is reduced to less than 200 mm² (preferably less than 150 mm²), which optimizes suction performance on uneven hard floors and tiled floors. When switching to the first functional position, the cross-section is increased to improve dust pickup performance on smooth hard floor surfaces.
3Use of energy by moving object
If a low-powered vacuum cleaner is used to reduce energy consumption, then energy efficiency is improved, but suction performance deteriorates on hard floor surfaces
Solution Approach 1:
The invention changes the physical parameter of the flow opening cross-section to optimize suction performance. By adjusting the total free flow cross-section to less than 200 mm² (preferably less than 150 mm²) in the second functional position, the suction nozzle compensates for the lower suction power of energy-efficient vacuum cleaners, enabling them to maintain adequate suction performance on hard floor surfaces without requiring high power consumption.
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 adjustable shielding device ensures effective dirt particle pickup on smooth and uneven surfaces, maintaining sufficient suction airflow and negative pressure while accommodating the limitations of low-power suction devices.
Implementation Method 1
a suction channel (3) opening into this suction opening (2) for conveying a suction airflow entering the suction opening (2)
Data Source
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AI summary
The invention relates to a suction nozzle for vacuuming hard floor surfaces, with a nozzle body (1) which, on its underside, has a suction mouth (2) designed as a depression and a suction channel (3) opening into the suction mouth (2) for draining a inflowing suction air flow, and with sealing elements (4, 4') which are arranged in the working direction in front of and behind the suction mouth (2) and project on the underside of the nozzle body (1). At least the sealing element (4) arranged in front of the suction mouth (2) in the working direction has through-flow openings (6) for sucking up dirt particles. According to the invention, a shielding device (7) is provided for changing the free flow cross section of the through-flow openings (6), the shielding device (7) being switched by means of a switching element arranged on the nozzle body between a first functional position é(1) for vacuuming smooth hard floor surfaces and a second functional position " (11) can be switched for vacuuming uneven hard floor surfaces and/or tiled floors. The total free flow cross section of the flow openings (6) is less than 200 mm2, preferably less than 150 mm2, in the second functional position "(11) and is smaller than in the first functional position.