Grease Filter Cartridge With Parallel Flow and Free Air Exit
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Solution Overview
Problem
Centrifugal grease filter cartridges have short centrifugal flow paths and do not effectively utilize the vortex separation principle, limiting their ability to capture grease efficiently due to operational and mechanical issues.
Innovation Solution
A grease extraction filter assembly with a filtering portion configured for parallel flow, a frame that defines a box structure allowing flow to exit from one end to the opposite side, and features such as pins and recesses, flexible brackets, and spoked structures with radial bristles to enhance surface area and reduce turbulence, improving capture efficiency and airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If centrifugal grease filter cartridges use short centrifugal flow paths, then the device complexity is reduced, but the grease capture efficiency deteriorates because they do not effectively utilize the vortex separation principle
Solution Approach 1:
The patent transitions from traditional centrifugal flow paths to a planar parallel flow configuration where filtration occurs in a different dimensional arrangement. The filter media is arranged in parallel planes allowing flow to move through multiple layers simultaneously, effectively utilizing surface area without requiring long centrifugal paths.
Solution Approach 2:
The patent extracts the core filtration function from the centrifugal mechanism and separates it into independent parallel flow channels. This allows the vortex separation principle to be applied more effectively by dedicating specific zones to different separation functions rather than relying on a single centrifugal path.
2Area of stationary object
If brush type filters use high density and high surface area configurations, then the filtering capacity is improved, but operational and mechanical problems arise that limit their effectiveness in grease cartridge-type filters
Solution Approach 1:
The filter is divided into multiple discrete parallel flow channels with individual support structures. Each channel is independently supported, preventing the mechanical problems that arise in high-density brush filters where the entire structure is interconnected and prone to operational failures.
Solution Approach 2:
Different regions of the filter are optimized for different functions: some areas provide high surface area for filtration while other areas provide structural support and turbulence reduction. The support structures are strategically positioned to maintain reliability without compromising the high surface area configuration.
3Stability of the object's composition
If the frame is surrounded edgewise by a solid structure of the hood opening, then the installation stability is improved, but the airflow exit is blocked preventing free flow
Solution Approach 1:
The frame is designed with a nested structure that fits within the hood opening while maintaining clearance for airflow. The box structure is nested within the solid framework, allowing the filter to be securely installed while preserving the necessary flow paths for efficient air movement.
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 enhances grease capture efficiency and reduces turbulence, resulting in lower pressure drop and energy savings by allowing airflow to exit freely, even when surrounded by a solid structure, and improves the overall performance of grease extraction filters.
Implementation Method 1
hardly benefit from the vortex separation principle
Implementation Method 2
spoked structures with radial bristles to enhance surface area and reduce turbulence
Data Source
AI summary
A grease filter has a filtering portion configured such that fumes enter a major face thereof and flow through a grease extraction filter therewithin in a direction parallel to the major face. A frame that fits into an opening of a hood defines a box structure that is configured to allow flow from the end (or ends) of the filtering portion where flow exits. The frame permits the flow to exit to a side opposite the face even when the frame is surrounded, edgewise, by a solid structure of the hood opening