Zigzag-Folded Spray Filter for Uniform Particle Loading
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Solution Overview
Problem
Existing filters in spray coating systems face a reduced service life due to high particle loads from overspray, which affects their performance and efficiency.
Innovation Solution
A filter design featuring a planar, zigzag-folded filter medium within a housing, with a collection volume to evenly distribute particles, supported by elements that maintain the zigzag shape and include undercuts to slow down particle loading, particularly at the outlet edges, enhancing the filter's durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is used in a spray coating system to capture paint mist, then the exhaust air can be filtered, but the service life of the filter is reduced due to high particle loads
Solution Approach 1:
The filter medium is folded into a zigzag pattern, segmenting the airflow path into multiple sections. This segmentation distributes particles across different zones of the filter medium, preventing localized saturation and extending the overall service life of the filter system.
Solution Approach 2:
The filter medium is configured in a three-dimensional zigzag fold pattern rather than a flat arrangement. This dimensional transformation increases the effective filtering surface area and creates a collection volume that distributes particles more evenly, thereby extending service life under high particle loads.
2Reliability
If the filter medium is placed close to the inlet opening, then the filtering surface area is maximized, but particle distribution becomes uneven causing premature wear
Solution Approach 1:
A collection volume is introduced as an intermediary space between the inlet opening and the filter medium. This collection volume acts as a buffer that evenly distributes particles across the filter medium surface before they contact the filtering material, preventing localized wear while maintaining effective filtering surface area.
3Stability of the object's composition
If the filter medium is rigidly fixed, then it maintains its shape, but it cannot be easily removed for disposal
Solution Approach 1:
The filter medium is held in place by a form-fit connection that allows for easy insertion and removal. This dynamic holding mechanism maintains the zigzag shape and position of the filter medium during operation while enabling straightforward removal for disposal or replacement, combining stability with ease of maintenance.
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 design achieves uniform particle distribution and delayed loading, extending the filter's service life and maintaining performance under high particle loads.
Implementation Method 1
Air laden with particles flows into the housing through the inlet opening, initially distributing itself evenly across the surface of the filter medium within the collection volume
Implementation Method 2
filter medium is spaced apart from the inlet opening to form a collection volume... Air laden with particles flows into the housing through the inlet opening... It then flows through the filter medium
Data Source
Figure 1
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AI summary
Filter (1) for a spray coating system, comprising a housing (2) with an inlet opening (3) and an outlet opening (4), wherein a planar, zigzag-folded filter medium (5) is accommodated in the housing (2), wherein the filter medium (5) is spaced apart from the inlet opening (3) for flow homogenization by forming at least one collection volume (6) and filter arrangement.