Suction Nozzle Cascade Flow Openings for Uniform Suction Air Intensity
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Solution Overview
Problem
Existing suction nozzles often fail to maintain uniform suction air intensity along the suction mouth, leading to suboptimal cleaning results, especially in the edge regions.
Innovation Solution
The suction channel end region is designed with multiple flow openings that connect to the suction mouth in a cascade manner, allowing for an asymmetrical connection and adjustable suction air intensity, ensuring uniform suction air distribution across the suction mouth by varying the size and shape of the flow openings and their cross-sectional areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single flow opening connects the suction mouth to the suction channel, then the structure is simple, but the suction air intensity is non-uniform along the suction mouth
Solution Approach 1:
The single flow opening is segmented into multiple flow openings (first, second, third flow openings) distributed along the suction mouth. Each flow opening connects to the suction channel at different positions, allowing independent control of suction air intensity at different sections of the suction mouth, thereby achieving uniform suction distribution across the entire width.
Solution Approach 2:
Different flow openings are designed with different cross-sectional areas and positions to create local variations in suction characteristics. The first flow opening has a larger cross-sectional area and is positioned at one end, while the second and third flow openings have smaller areas and are positioned at different locations, allowing each region of the suction mouth to have optimized local suction properties for uniform overall performance.
2Device complexity
If the suction channel is centrally connected to the suction mouth, then the structure is symmetrical and simple, but the suction air intensity cannot be uniformly distributed along the suction mouth
Solution Approach 1:
The suction channel is asymmetrically connected to the suction mouth through multiple flow openings positioned at different locations and orientations. The first flow opening is positioned at one end region, while the second and third flow openings are positioned at different locations, creating an asymmetric flow distribution pattern that enables uniform suction air intensity along the entire suction mouth width.
Solution Approach 2:
The connection between the suction channel and suction mouth is extended from a single central point connection to multiple distributed connections along the longitudinal dimension of the suction mouth. This dimensional expansion allows suction air to be introduced at multiple locations, creating a more uniform distribution pattern across the width of the suction mouth.
3Manufacturing precision
If multiple flow openings are used to achieve uniform suction air intensity, then the suction performance is improved, but the device complexity increases
Solution Approach 1:
Multiple flow openings are merged into a single suction channel structure, where the first, second, and third flow openings all connect to the same suction channel. This merging approach allows uniform suction distribution to be achieved while maintaining a relatively simple overall structure, as the flow openings are integrated into the existing suction channel rather than requiring separate channels for each opening.
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 a homogeneous suction air intensity along the suction mouth, enhancing cleaning efficiency and flexibility in geometric design and installation, regardless of the suction nozzle's structural conditions.
Implementation Method 1
a first flow portion flowing from the suction mouth through a first flow opening into the suction channel end region flows past a second flow opening of the suction channel end region within the suction channel end region, the first flow portion and a second flow component flowing through the second flow opening into the suction channel end region add up
Data Source
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AI summary
The invention relates to a suction nozzle (1) for a vacuum cleaning device (2), wherein the suction nozzle (1) has a suction channel (3) for connection to a blower of a vacuum cleaning device (2), wherein a suction channel end region (4, 5) of the suction channel (3) opens into a suction mouth (6), wherein the suction channel end region (4, 5) has a plurality of flow openings (7, 8, 9, 10, 11, 12) opening into the suction mouth (6), which are arranged in a cascade such that a first flow component entering the suction channel end region (4, 5) from the suction mouth (6) through a first flow opening (7, 10) flows past a second flow opening (8, 9, 11, 12) of the suction channel end region (4, 5) within the suction channel end region (4, 5), wherein the first flow component and a flow through the second Add the second flow component flowing into the suction channel end area (4, 5) through the flow opening (8, 9, 11, 12).In order to achieve an even distribution of cleaning performance independent of structural conditions of the suction nozzle (1), it is proposed that the suction channel (3) be connected decentrally to the suction mouth (6) and assigned on one side to an end region of the suction mouth (6), whereby the suction channel end region (4, 5) enables an asymmetric connection of the suction channel (3) to the suction mouth (6).