Foldable Pleated Air Filter Media for Low-Volume Shipping
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Solution Overview
Problem
Existing air filters are not compressible, crushable, or foldable, leading to high shipping costs due to the need for large boxes and inflexible packaging, which also complicates disposal and replacement in HVAC systems.
Innovation Solution
A collapsible and foldable air filter media composed of modular filter strips with folding creases, allowing it to be folded into standard shipping envelopes or bags, reducing packaging size and weight, and easily inserted into a frame for use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If air filters are made with rigid cardboard frames and steel mesh to maintain structural integrity, then the filter can support the pleated media and function properly, but the filter becomes non-compressible and non-foldable, requiring large rigid boxes for shipping
Solution Approach 1:
The filter is divided into multiple pleated panels that are connected by flexible hinges. Each panel can be folded independently, allowing the entire filter to be collapsed into a compact form while maintaining the structural integrity of individual panels through their rigid pleated construction.
Solution Approach 2:
Flexible hinges connect the rigid pleated panels, enabling the filter to bend and fold without breaking. These hinges provide the necessary flexibility for compression and folding while the rigid panels maintain their structural strength during operation.
2Adaptability or versatility
If air filters use standardized rectangular shapes with rigid frames, then they fit standard HVAC systems, but they cannot be compressed or folded, leading to high shipping costs
Solution Approach 1:
The filter transitions from a rigid, fixed shape during installation to a flexible, foldable structure during shipping. The flexible hinges enable the filter to be collapsed into various compact configurations, reducing shipping volume while maintaining the standardized rectangular shape needed for HVAC compatibility when installed.
Solution Approach 2:
The pleated panels are folded nested within each other, with each panel containing the previous one in a compact arrangement. This nesting capability allows the filter to be reduced to a small fraction of its expanded size for shipping while maintaining the full rectangular dimensions when installed in HVAC systems.
3Reliability
If air filters are shipped in large rigid boxes to protect from damage, then the filters are protected during transport, but the packaging size and weight increase substantially
Solution Approach 1:
The filter is pre-assembled with flexible hinges and pleated panels in a compactable configuration before shipping. This preliminary preparation allows the filter to be easily folded and compressed into small packaging, reducing both weight and volume while the flexible construction inherently protects against damage during handling.
4Productivity
If pleated filter media is used to increase surface area and reduce pressure drop, then air filtration efficiency improves, but the filter structure becomes more complex and less compressible
Solution Approach 1:
The pleated media is divided into multiple separate panels rather than one large continuous structure. Each panel maintains the pleated configuration for high surface area and filtration efficiency, while the segmentation allows each panel to be independently folded and compressed, reducing overall structural complexity and improving compressibility.
Data Source
AI summary
A foldable and disposable air filter media for insertion into an air filter frame is disclosed. The air filter media includes two or more filter pleated strips that are joined together. The outer edges of the air filter media are fixed to the frame to form the air filter. Each of the filter pleated strips have a number of pleats that increase the area to reduce pressure drop across the filter media while allowing air flow through to remove unwanted particles from the filtered air. A folding crease is formed between the opposite border edges of the air filter media allowing the air filter media to be folded for shipping or disposal.