Switch Cabinet Filter With Absorber Mat for Moisture Blocking
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Solution Overview
Problem
Air inlet or air outlet filters in switch cabinet housings are a weak point for IP protection due to their inherent permeability to liquids, which can lead to moisture entering the cabinet, potentially harming electrical components.
Innovation Solution
Incorporating a nonwoven fabric absorber mat with superabsorbent properties into the filter substrate, which can absorb and swell upon contact with liquid, reducing permeability and preventing liquid entry into the switch cabinet. The absorber mat can be integrated with a pleated filter or used as a separate component, with superabsorbent distribution optimized to minimize air passage blockage and maintain airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pleated filter is used to cover the air passage cross-section, then air filtration is achieved, but liquid permeability increases making the filter a weak point for IP protection
Solution Approach 1:
The filter substrate is formed as a composite structure combining a pleated filter for air filtration with an absorber mat made of nonwoven fabric containing superabsorbent material. This composite structure allows the pleated filter to perform its air filtration function while the absorber mat simultaneously provides liquid absorption and swelling capabilities, creating a multi-functional filter system that addresses both air quality and liquid protection requirements
Solution Approach 2:
The superabsorbent material in the absorber mat undergoes a parameter change when exposed to liquid - it absorbs liquid and swells significantly in volume. This volume expansion transforms the absorber mat from a relatively open porous structure to a swollen state that effectively blocks liquid passage, dynamically changing the filter's liquid permeability parameter from permeable to impermeable based on liquid exposure
2Object-affected harmful factors
If an absorber mat with superabsorbent is added to the filter substrate, then liquid permeability is reduced, but device complexity increases
Solution Approach 1:
The absorber mat is integrated directly into the filter substrate assembly, with the nonwoven fabric containing superabsorbent material combined with the pleated filter structure. This merging of components creates a unified filter assembly where the absorber mat becomes an intrinsic part of the filter substrate, reducing the need for separate liquid protection mechanisms and simplifying the overall device structure despite adding liquid absorption functionality
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 solution significantly reduces liquid permeability, ensuring protection against moisture ingress and maintaining airflow, even when exposed to significant liquid volumes, thereby enhancing the IP protection class of the switch cabinet housing.
Implementation Method 1
the filter substrate has an absorber mat made of nonwoven fabric. The nonwoven fabric can have absorbing properties with respect to liquid, preferably water, and/or a superabsorbent
Implementation Method 2
When a superabsorbent is used, it has the property that it (greatly) increases its volume when exposed to liquid and thus reduces the permeability of the filter substrate to any fluid
Implementation Method 3
The nonwoven fabric can be liquid-absorbing and/or hydrophobic. The fibres of the nonwoven fabric can be hydrophobic
Implementation Method 4
the nonwoven fabric and/or the pleated filter can have on a lower side a liquid-absorbing material strip, preferably a hydrophilic nonwoven fabric
Data Source
AI summary
An air inlet or air outlet filter for a switch cabinet housing, having a filter housing in which a filter substrate is arranged with a pleated filter which completely covers an air passage cross-section of the filter housing, wherein the filter substrate has a liquid-absorbing absorber mat made of nonwoven fabric. A corresponding switch cabinet arrangement is thus described.