W-Shaped Baffle Filter for Grease Capture and Flame Control
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Solution Overview
Problem
Conventional baffle filters in kitchen ventilation systems have low capture efficiency and flame retarding capability, leading to frequent maintenance needs and increased operational costs due to grease buildup and potential fire hazards.
Innovation Solution
The design of a baffle filter with W-shaped baffle members and a frame structure that deflects air flow multiple times, enhancing capture efficiency and flame control by ensuring impurities impact surfaces for drainage, while the frame elements are coupled together for easy assembly and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional baffle filters are used, then the structure is simple and easy to manufacture, but the capture efficiency is low and flame retarding capability is insufficient
Solution Approach 1:
The baffle filter is divided into multiple baffle members (first baffle member, second baffle member, etc.) arranged in sequence, where each baffle member has a specific shape (such as W-shape or zigzag) that creates multiple deflection points. This segmentation allows the exhaust flow to be deflected multiple times, increasing capture efficiency for grease particles while maintaining a relatively simple manufacturing process for each individual baffle member.
Solution Approach 2:
The baffle members are designed with three-dimensional shapes (W-shape, zigzag, or serpentine configurations) that extend in multiple directions rather than simple flat planes. This dimensional complexity creates multiple surfaces for grease impact and drainage while the overall structure remains manufacturable using standard fabrication techniques for metal or plastic components.
2Productivity
If conventional baffle filters with low capture efficiency are used, then the device complexity is low, but grease buildup in ductwork increases requiring frequent cleaning and maintenance
Solution Approach 1:
The baffle filter performs preliminary separation of grease particles from exhaust air before the air enters the ductwork system. By capturing grease at the source through multiple baffle deflections and drainage channels, the filter prevents grease buildup in downstream ductwork, thereby reducing maintenance frequency and operational disruptions.
Solution Approach 2:
The baffle filter design includes dedicated drainage channels and collection areas that actively extract and remove grease particles from the exhaust stream. This extraction function separates grease from air flow and directs it to collection points, preventing grease accumulation in the ventilation system and reducing maintenance requirements.
3Object-affected harmful factors
If conventional baffle filters are used, then the manufacturing cost is low, but the flame length is excessive creating fire hazards
Solution Approach 1:
The flame path is segmented by multiple baffle members arranged in sequence, creating multiple deflection points that interrupt and shorten flame propagation. Each baffle member acts as a separate barrier, progressively reducing flame length as exhaust passes through the series of baffles, thereby mitigating fire hazards while maintaining manufacturable component designs.
4Ease of manufacture
If conventional baffle filters with low capture efficiency are used, then the ease of manufacture is high, but operational costs increase due to frequent cleaning and maintenance
Solution Approach 1:
The filter is constructed from multiple discrete baffle members that can be manufactured using standard, simple processes and then assembled together. This modular segmentation maintains ease of manufacture for each component while the cumulative effect of multiple baffles provides superior grease capture efficiency, reducing maintenance frequency and operational costs.
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 baffle filter achieves a capture efficiency of at least 20% for 7 micron particles and reduces flame length, requiring less frequent maintenance and improving safety by effectively filtering grease and soot, thus reducing operational costs and fire risks.
Implementation Method 1
baffle filters generally operate by deflecting the cooking exhaust flow as it passes through the baffle so that heavier substances (e.g. liquids such as grease, solids, etc.) impact the surface of the baffle
Implementation Method 2
After impacting the surface of the baffle, these substances drain to a collection area
Implementation Method 3
heavier substances (e.g. liquids such as grease, solids, etc.) impact the surface of the baffle
Data Source
AI summary
Various embodiments of a filter are described herein. In one embodiment, a filter includes a first side and a second side both of which have openings therein. A plurality of baffle members are positioned between the first side and the second side. The plurality of baffle members may be provided as separate pieces or as part of a baffle element. The filter may be used to remove grease from cooking exhaust in residential or commercial kitchen environments. In another embodiment, the filter includes a first side which has a plurality of entry openings in it and a plurality of baffle members which define a plurality of exit openings where air exits the filter.