Range Hood Disk Filter Cover Design for Reduced Oil Contamination
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Solution Overview
Problem
Existing range hoods require frequent cleaning due to the collection of oil in a reservoir surrounding the disk filter, which leads to contamination and oxidation of the filter, making long-term cleaning difficult and reducing suction power.
Innovation Solution
A range hood design featuring a disk filter with an inclined outer periphery, a cover with an outlet hole for oil drainage to a rectifying plate, and an oil collection case that includes an oil detecting portion, along with oil-repellency treatments on surfaces to reduce cleaning frequency and improve workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil is collected in a reservoir surrounding the disk filter, then oil collection is achieved, but the filter becomes contaminated and requires frequent cleaning
Solution Approach 1:
The patent extracts the harmful effect by separating the oil collection function from the filter area. The inclined cover directs oil away from the disk filter toward a collection groove and reservoir, preventing oil contamination of the filter while maintaining effective oil collection from the airflow
Solution Approach 2:
The inclined cover acts as an intermediary element between the disk filter and the oil reservoir. It mediates the oil flow path, guiding oil away from the filter area through gravity and geometric design, thus protecting the filter from direct oil contact while enabling oil collection
2Reliability
If the grease collecting member surrounds the outer periphery of the filter, then grease collection is improved, but access for cleaning becomes difficult
Solution Approach 1:
The patent segments the oil collection system into distinct functional zones: the disk filter for air filtration, the inclined cover for oil redirection, the collection groove for oil accumulation, and the reservoir for oil storage. This segmentation allows the reservoir to be positioned for easy access while maintaining effective grease collection surrounding the filter area
3Productivity
If air circulation is maintained by disk filter rotation, then fume collection is effective, but oil oxidation is accelerated
Solution Approach 1:
The patent extracts the oil from the air circulation path by directing it into a separate reservoir through the inclined cover and collection groove. Once in the reservoir, oil is isolated from the continuous air flow generated by disk filter rotation, preventing oxidation while maintaining effective fume collection during operation
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 design allows for reduced cleaning frequency by directing oil away from the disk filter, preventing oxidation and contamination, and enhancing the fume collection efficiency while simplifying the cleaning process by collecting oil in an easily accessible area.
Implementation Method 1
a disk filter (4) disposed upstream of the fan (3) in the flow path to filter the air... The disk filter (4) is rotated at a predetermined rotation speed by a motor (5)... grease contained in the fumes collides with the rotating filter to flow in the direction of the outer periphery of the filter
Implementation Method 2
the outer periphery of the disk filter (4) is formed to be inclined downward such that the oil flows to the bottom surface of the cover... an outlet portion for oil to flow from the disk filter (4) to the rectifying plate (6)
Implementation Method 3
oil-repellency treatments on surfaces to reduce cleaning frequency and improve workability
Data Source
AI summary
A range hood for collecting oil scattered from a rotating disk filter, capable of improving the cleaning workability is provided. The range hood includes a fan configured to generate an air flow, a disk filter provided on a flow path of the air flow and having a slit, a motor configured to rotate the disk filter, a rectifying plate provided upstream of the disk filter on the flow path of the air flow, and a disk cover configured to surround an outer periphery portion of the disc filter and having an outlet portion that allows oil from the disk filter to flow out to a predetermined portion of the rectifying plate.