Grease Filter Pad Composition for Airflow and Heat Resistance
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Solution Overview
Problem
Existing grease removal systems in kitchen exhaust hoods face issues with heat and flame degradation of wool filters, frequent replacement due to trade-offs between airflow and grease collection capacity, and the need for costly metal support frames, leading to operational inefficiencies and safety concerns.
Innovation Solution
A disposable grease removal device (DGRD) featuring a filter pad made from a blend of flame-resistant viscose and wool fibers, supported by a non-metallic stabilizer frame, which captures grease particulates effectively while withstanding heat and flames, and is designed to be self-supporting and easily replaceable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a thin wool filter is used, then airflow is sufficient, but grease collection capacity is limited
Solution Approach 1:
The patent applies composite materials by combining wool fibers with flame-resistant viscose fibers in a blended filter medium. This composite structure allows the filter to maintain the grease-collecting properties of wool while incorporating the heat and flame resistance of viscose, enabling the filter to achieve both sufficient airflow and increased grease collection capacity without frequent replacements
2Quantity of substance
If a thick wool filter is used, then grease collection capacity increases, but airflow is reduced
Solution Approach 1:
The blended filter medium of wool and flame-resistant viscose fibers creates a composite material that optimizes the balance between grease collection and airflow. The viscose component provides structural integrity and heat resistance, allowing the filter to be designed with optimal thickness for grease capture while maintaining adequate airflow characteristics
3Reliability
If stainless steel heat shields are placed in front of wool filters, then heat degradation is prevented, but device complexity and cost increase
Solution Approach 1:
The patent applies local quality by incorporating flame-resistant viscose fibers directly into the filter medium itself, providing heat and flame resistance exactly where it is needed - within the filter structure. This eliminates the need for separate stainless steel heat shields and frame covers, simplifying the assembly while maintaining reliable heat protection
Solution Approach 2:
The patent merges the function of heat shielding with the filter medium by blending flame-resistant viscose fibers into the wool filter. This combination integrates multiple functions (grease collection and heat protection) into a single component, eliminating the need for separate heat shield assemblies and reducing overall device complexity
4Strength
If metal support frames are used, then structural support is provided, but weight and susceptibility to damage increase
Solution Approach 1:
The patent replaces the mechanical metal support frame system with a self-supporting filter medium constructed from blended wool and flame-resistant viscose fibers. This substitution eliminates heavy metal frames while maintaining structural integrity through the engineered composite material properties, significantly reducing the weight of the filter assembly
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 DGRD maintains airflow efficiency with increased grease collection capacity, reduces fire hazards by minimizing grease particulates in ductwork, and eliminates the need for metal frames, resulting in a more cost-effective and durable solution for kitchen exhaust systems.
Implementation Method 1
A filter assembly that is effective at removing or reducing grease particulates from grease laden air
Implementation Method 2
The stabilizer frame is configured to provide support to the filter pad to maintain the filter pad in a generally flat configuration
Data Source
AI summary
A filter assembly includes a filter pad comprising fibers including natural, synthetic and/or hybrid fibers. A stabilizer frame formed of a non-metallic material may be imbedded in the filter pad. The stabilizer frame may be configured to provide support to the filter pad to maintain the filter pad in a generally flat configuration. In accordance with a particular embodiment, the filter pad may be comprised of at least first and second fibrous mats that are coupled together. In this embodiment, the stabilizer frame may be disposed between and coupled with the first and second fibrous mats.