Pleated Air Filter Assembly for HVAC Plenum Service Life
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Solution Overview
Problem
HVAC systems in industries like construction and mining face frequent downtime due to the high replacement frequency of fresh air filters in plenums, which are clogged by contaminants, necessitating separate service stops.
Innovation Solution
An air filter assembly with a support assembly and filter frame that includes a non-linear configuration with an annular mounting flange and planar sections complementary to the plenum's internal passage, allowing for easy installation and increased surface area for filtration, reducing the need for frequent replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a panel filter is used in the fresh air plenum, then contaminants are removed from the air, but the filter requires frequent replacement due to clogging
Solution Approach 1:
The filter media is folded into a pleated configuration, transforming it from a flat two-dimensional panel to a three-dimensional structure with increased surface area. This dimensional change allows more filter media to be packed into the same plenum space, extending the filter's capacity and service life while maintaining effective contaminant removal
2Ease of repair
If the fresh air filter is replaced separately from other machine filters, then the filter can be maintained, but machine downtime increases
Solution Approach 1:
The support assembly is designed with a universal mounting structure that accommodates the pleated filter and integrates with the plenum's existing support system. This universal design allows the filter to be installed using the same mounting mechanisms as other components, enabling combined maintenance operations that reduce overall machine downtime
3Device complexity
If a flat panel filter is used, then the filter structure is simple, but the plenum interior space is not fully utilized
Solution Approach 1:
The filter media is folded into a pleated configuration, transforming it from a flat two-dimensional panel to a three-dimensional structure with increased surface area. This dimensional change allows more filter media to be packed into the same plenum space, extending the filter's capacity and service life while maintaining effective contaminant removal
Solution Approach 2:
The support assembly features a curved or contoured mounting surface that follows the shape of the plenum's internal passage. This curved design allows the pleated filter to conform to the available space, maximizing space utilization while maintaining structural integrity and simple installation
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 air filter assembly extends the usable life of the filter, synchronizing its service interval with other machine filters, thereby reducing machine downtime and eliminating the need for separate service stops.
Implementation Method 1
the panel filter is made of filter media that is semi-permeable to air flow allowing air to pass while removing the contaminants
Data Source
AI summary
An air filter assembly for use with a plenum having an internal passage with a non-linear configuration comprising is provided. The air filter assembly includes a support assembly including a neck portion that is insertable into the internal passage in the plenum and a mounting face. The air filter assembly includes an air filter with a filter frame supporting a filter media. The filter frame has an annular mounting flange extending around a perimeter of an inlet side of the filter which is configured to be releasably connectable to the mounting face of the support assembly. An outlet side of the filter includes a plurality of planar sections that extend at non-90° angles relative to each other and that are configured to be complementary to the internal passage of the plenum.