Vacuum Cleaner Hand Guard With Inclined Blades for Low Air Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vacuum cleaners face challenges in minimizing resistance to the suction air flow and achieving a compact anti-trap protection design, leading to inefficiencies and potential noise issues due to air turbulence and contact with dangerous parts.
Innovation Solution
The vacuum cleaner incorporates an anti-trap element with surface elements inclined relative to the suction air flow, designed like propeller blades, to minimize flow resistance and prevent contact with moving parts, while being adaptable to different suction air flow patterns and motor/fan units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional anti-trap element is positioned perpendicular to the suction air flow, then protection against contact with moving parts is provided, but resistance to the suction air flow increases and air turbulence occurs
Solution Approach 1:
The anti-trap element is designed with an asymmetric orientation where the surface is inclined at an angle between 10-45 degrees relative to the suction air flow direction, rather than being perpendicular. This asymmetric positioning allows the air flow to pass along the surface more smoothly, reducing resistance and turbulence while still maintaining the protective function against contact with moving parts.
Solution Approach 2:
The protective function is enhanced by adding a second dimension to the surface element design. The surface is not only inclined at an angle but also extends in multiple directions (radially and axially) to create a three-dimensional protective barrier that effectively blocks access to moving parts while allowing optimized air flow passage.
2Reliability
If the anti-trap element is designed with extensive surface coverage, then protection against contact with moving parts is improved, but the device size increases and compactness is reduced
Solution Approach 1:
The anti-trap element employs local quality by concentrating protective surface elements in specific areas where contact risk is highest. The surface elements are strategically positioned and oriented to provide maximum protection with minimum material, rather than uniformly covering all areas. This allows effective protection while maintaining a compact overall device size.
Solution Approach 2:
The protective structure is segmented into multiple discrete surface elements rather than a single large barrier. These segmented elements can be independently positioned and oriented to provide protection in critical areas while leaving other areas open for air flow, thus achieving protection without increasing overall device volume.
3Reliability
If the surface element is oriented perpendicular to the suction air flow, then contact protection is maximized, but air turbulence and noise increase
Solution Approach 1:
The surface element is oriented asymmetrically at an inclined angle (10-45 degrees) relative to the suction air flow rather than perpendicular to it. This asymmetric orientation allows the air flow to pass along the surface more smoothly, reducing flow separation and turbulence, thereby minimizing noise generation while maintaining protective function.
Solution Approach 2:
The design considers the dynamic nature of the suction air flow by orienting the surface elements to match the flow direction. The inclined orientation dynamically adapts to the air flow pattern, allowing the flow to follow the surface contour rather than abruptly impacting a perpendicular surface, thus reducing turbulence and noise.
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 reduces air turbulence and noise, enhances suction efficiency, and provides effective protection against contact with dangerous parts, achieving a more compact and efficient operation.
Implementation Method 1
the surface elements (41) are inclined relative to a transport direction (17) of the suction air flow (16) in order to be oriented along an imaginary suction air flow which has an angular momentum
Implementation Method 2
oriented along an imaginary suction air flow which has an angular momentum, with the angular momentum of the imaginary suction air flow being directed in or against the transport direction
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a vacuum cleaner (10) comprising a dust chamber (11), a fan chamber (12) which is connected to the dust chamber (11) by means of the flow chamber, and a hand protection element (40) arranged in the air channel (20), said dust chamber housing a dust separation unit (14) and a motor ventilator unit (15) for generating a suction air flow is arranged in the flow chamber, said hand protection element (40) comprising at least one planar element (41) past which the suction air flow flows, and the hand protection element (40) is mounted upstream of the motor ventilator unit in the direction of the suction air flow (16). The planar element (41) is inclined in relation to the direction of transport of the suction air flow, in order to guide along an imaginary suction air flow which has a rotational pulse aligned to or counter to the direction of transport. This enables a structurally simple and economical vacuum cleaner (10) comprising a hand protection element (40) which prevents the user from injury from dangerous parts, such as the ventilator blades, to be produced. In particular, the resistance against the air suction flow by the hand protection element (40) can be reduced. This is achieved by the fact that the planar elements (41) of the hand protection element (40) are embodied as a propeller blade. Also, a compact hand protection element can be obtained.