Device for vacuum cleaning
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Solution Overview
Problem
Existing vacuum cleaners face challenges in achieving high suction air flow while maintaining energy efficiency, as they often have reduced airflow when the filter bag is filled, which affects cleaning performance and energy consumption.
Innovation Solution
A vacuum cleaning device with a motor-blower unit having specific power consumption ranges and a suction hose with a large cross-sectional area, combined with a disposable filter bag made of nonwoven material, to enhance airflow and efficiency, achieving a suction air flow of over 33 l/s and meeting energy efficiency class B or better.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the filter bag is filled during operation, then the suction air flow is reduced, but the cleaning performance must be maintained
Solution Approach 1:
The patent applies the dynamics principle by making the suction hose expandable. The hose is designed with elastic material that allows it to expand in volume when dust is collected in the filter bag, thereby maintaining the cross-sectional area and suction air flow characteristics even as the filter bag fills up. This dynamic adaptation resolves the contradiction between maintaining productivity (suction air flow) and reliability (cleaning performance) throughout the operation cycle.
2Use of energy by moving object
If the rated power consumption is reduced to meet energy efficiency requirements, then energy efficiency class B or better is achieved, but the suction air flow may be insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the physical parameters of the suction hose - specifically its cross-sectional area and elasticity. By increasing the cross-sectional area (at least 9.5 cm²) and incorporating expandable elastic material, the system maintains higher airflow at lower power consumption levels, enabling achievement of both energy efficiency class B and adequate suction performance.
3Productivity
If a conventional suction hose with fixed cross-sectional area is used, then the device complexity is low, but the airflow is reduced when the filter bag is filled
Solution Approach 1:
The patent applies the flexible shells principle by constructing the suction hose from elastic, flexible material that can expand and contract. This flexible hose adapts its volume and shape in response to the filling state of the filter bag, maintaining optimal airflow characteristics without requiring complex mechanical adjustment mechanisms, thus balancing productivity improvement with acceptable device complexity.
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 significantly increases airflow and efficiency, ensuring a cleaning class of C or better while maintaining low average electrical input power, thus meeting stringent energy policy requirements and providing a satisfactory suction result.
Implementation Method 1
a negative pressure in the measuring chamber at aperture 6 (23 mm) of greater than 12.5 kPa and a negative pressure in the measuring chamber at aperture 8 (40 mm) of greater than 4.0 kPa is set
Implementation Method 2
achieve a suction air flow of more than 33 l/s
Implementation Method 3
a filter bag, in particular a disposable filter bag, made of nonwoven fabric
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a device for vacuum cleaning with a vacuum cleaner, a suction hose connected to the housing of the vacuum cleaner, and a filter bag, the canister vacuum cleaner having a motor/blower unit which is designed in such a way that its average electrical input power is between 1000 W and 200 W. and with an average electrical input power between 1000 W and 800 W, a negative pressure in the measuring chamber at aperture 6 of more than 12.5 kPa and a negative pressure in the measuring chamber at aperture 8 of more than 4.0 kPa results, 799 W and 600 W a negative pressure in the measuring chamber at aperture 6 of greater than 10.0 kPa and a negative pressure in the measuring chamber at aperture 8 of greater than 3.4 kPa results, 599 W and 400 W a negative pressure in the measuring chamber at aperture 6 of greater than 7 .0 kPa and a negative pressure in the measuring chamber at aperture 8 of greater than 2.5 kPa, 399 W and 200 W a negative pressure in the measuring chamber at aperture 6 of greater than 4.0 kP a and a negative pressure in the measuring chamber at aperture 8 of greater than 1.4 kPa, and wherein the suction hose has an average cross-sectional area of at least 9.5 cm2, in particular at least 11 cm2 or 13 cm2, and the filter bag is made of nonwoven fabric.