Cleaning device with flow deflecting element with built-in wall and use of a flow deflecting element with built-in wall
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Solution Overview
Problem
Existing cleaning devices face challenges in achieving high flow efficiency while effectively attenuating noise, particularly in the frequency range below 2000 Hz, due to the design of flow deflection elements that do not adequately manage sound propagation and turbulence.
Innovation Solution
The integration of a flow-guiding and sound-permeable installation wall within the flow deflection element, which covers the edge at the transition area between pipe arms, guides airflow away from the edge and allows sound transmission, thereby reducing noise while maintaining high flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a flow deflection element with a sharp edge at the transition area is used, then sound attenuation is improved, but flow efficiency deteriorates due to turbulence and pressure loss
Solution Approach 1:
An installation wall is introduced as an intermediary element between the first and second pipe arms. This wall covers the edge in the interior space and guides the flow, preventing direct contact with the edge while still allowing sound to pass through via sound-permeable material or openings, thus resolving the conflict between noise reduction and flow efficiency
Solution Approach 2:
The installation wall is designed with different local properties: it is flow-guiding on the flow-facing side to maintain efficiency, while being sound-permeable (through material selection or openings) on the sound transmission side to maintain noise attenuation. This local differentiation of properties allows simultaneous achievement of both goals
2Productivity
If the installation wall is designed to be flow-guiding, then flow efficiency is improved, but sound attenuation may deteriorate if the wall blocks sound transmission
Solution Approach 1:
The installation wall is made from sound-permeable material or includes openings that allow sound waves to pass through while the overall structure maintains its flow-guiding function. This porosity or permeability enables sound transmission without compromising the flow guidance capability
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 achieves effective noise reduction with minimal turbulence and pressure loss, ensuring high flow efficiency and broad sound attenuation across a range of frequencies.
Implementation Method 1
The collision of the first and second pipe arms with the edge at the outer corner area results in effective noise reduction through corresponding sound damping.
Implementation Method 2
the installation wall is designed to be flow-guiding... Due to the flow-guiding function of the mounting wall, high flow efficiency is achieved, as the fluid flow, which is guided by the at least one flow deflector element, can bypass the edge.
Implementation Method 3
the installation wall is designed to be flow-guiding and sound-permeable... By providing a sound-permeable mounting wall, the effective noise reduction achieved through the edge design is maintained.
Data Source
Figure 1
Figure 2~3
Figure 4(1)~4(3)
AI summary
Provided is a cleaning device comprising at least one noise source and an air conducting unit having at least one flow deflection element (10), the at least one flow deflection element (10) having a first pipe arm (16) and a second pipe arm (18), the second pipe arm (18) extending transversely to the first pipe arm (16), the first pipe arm (16) and the second pipe arm (18) having a common edge (48) in an outer corner region (44), characterized in that a built-in wall (52) is arranged in an interior (14) of the at least one flow deflection element (10), said built-in wall (52) covering the edge (48) in the interior (14), in that the built-in wall (52) faces a flow-through zone (128) in the interior (14), and in that the built-in wall (52) is designed to be flow-conducting and sound-permeable.