Foam Generation Device with Sieve Section for Bubble Size Control
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Solution Overview
Problem
Existing foam generating devices for high-pressure cleaning systems produce cleaning foam with large bubble sizes, leading to reduced dimensional stability and impaired jet profiles, resulting in a lower cleaning effect.
Innovation Solution
The foam generating device incorporates a foaming section with larger passage openings and a sieve section with smaller openings, reducing air bubble size and enhancing foam stability, along with a central area without openings to direct the cleaning agent flow, ensuring a solid and dimensionally stable foam is formed, which is then shaped into a flat jet by a jet-shaping element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the foaming section uses small openings to generate high back pressure and create foam, then foam formation is improved, but lateral foam escape increases and dimensional stability decreases
Solution Approach 1:
The device divides the foam generation process into two distinct stages: a foaming section with larger openings that prevents lateral foam escape, and a sieve section with smaller openings that reduces bubble size. This segmentation allows each section to perform its specific function optimally without compromising the other.
Solution Approach 2:
The sieve section acts as an intermediary element between the foaming section and the outlet. It receives the initially formed foam and further processes it by reducing bubble size through its smaller openings, thereby improving dimensional stability without requiring the foaming section to use small openings that would cause lateral escape.
2Stability of the object's composition
If the foaming section uses large openings to prevent lateral foam escape, then foam containment is improved, but bubble size increases and cleaning effect decreases
Solution Approach 1:
The foam processing function is segmented into two sections: the foaming section with larger openings that contains foam effectively, and the sieve section with smaller openings that controls bubble size. This segmentation resolves the contradiction by distributing the functions across different sections.
Solution Approach 2:
The foam undergoes continuous processing as it passes through both sections. The foaming section initially creates foam and prevents escape, then the sieve section continuously reduces bubble size, maintaining the useful action of foam refinement throughout the flow path.
3Device complexity
If a single foaming element is used to generate foam, then device complexity is reduced, but foam dimensional stability and jet profile are impaired
Solution Approach 1:
The single foaming element is segmented into two functional sections: a foaming section for initial foam generation and containment, and a sieve section for bubble size reduction. This segmentation improves foam quality while maintaining relatively simple device structure.
Solution Approach 2:
The two-section element performs multiple functions within a single integrated component. The foaming section handles foam generation and containment, while the sieve section handles bubble size reduction, combining multiple functions that would otherwise require separate devices.
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 configuration results in a cleaning foam with high dimensional stability and a well-defined jet profile, enhancing the cleaning effect and preventing foam leakage, thereby improving the overall performance of the high-pressure cleaning system.
Implementation Method 1
the foaming element creates back pressure in the flow channel, causing turbulence as the cleaning agent passes through the foaming section, which leads to foam formation
Implementation Method 2
the sieve section has through-openings that are smaller than the through-openings of the foaming section... air bubbles in the cleaning foam can be reduced in size
Data Source
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Figure 3~4
AI summary
The invention relates to a foam generation device 10, in particular as an accessory for a high pressure cleaning unit, which foam generation device 10 comprises or forms a flow channel 18, and comprises a nozzle body 30 with an outlet opening 34, and a foaming element 68 which has a foaming section 72 which is arranged in the flow channel 18 upstream of the outlet opening 34 and has through openings 82, wherein a foamable cleaning agent flows through the flow channel 18 as far as the outlet opening 34 and is foamed when passing through the foaming section 72, and wherein the nozzle body 30 comprises a jet forming element 32 at the outlet opening 34 for forming a flat jet of the foamed cleaning agent. In order to provide a foam generation device 10 of this type, by way of which a cleaning foam with improved cleaning action can be generated, it is proposed according to the invention that the foam generation device 10 comprises a screen element 70 which has a screen section 96 which is arranged in the flow channel 18, that the screen section 96 is arranged downstream of the foaming section 72 and at a spacing from the latter and upstream of the jet forming element 32, and that the screen section 96 has through openings 102 which are smaller than the through openings 82 of the foaming section 72.