Smoke Filter with Variable-Area Holes to Prevent Smoke Escape
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Solution Overview
Problem
Existing smoke filter devices in range hoods are non-detachable, making thorough cleaning difficult, and their uniform filter holes lead to poor smoke filtering efficiency due to uneven suction distribution, allowing smoke to escape around burners.
Innovation Solution
A smoke filter device with oil filter sections having varying filter hole areas, where the holes near the ends are smaller than those in the middle, increasing suction force and improving suction efficiency, and a foldable design with a locking mechanism for easy cleaning and assembly/disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform filter holes are used for ease of manufacture, then manufacturing is simplified, but smoke filtering efficiency deteriorates due to uneven suction distribution
Solution Approach 1:
The patent applies local quality by making filter holes with different areas at different positions. Specifically, filter holes in the middle region have a first area while filter holes at the end regions have a second area that is smaller than the first area. This non-uniform design compensates for the weaker suction force at the ends, ensuring more uniform smoke extraction across the entire filter device while maintaining manufacturability through a systematic area variation pattern.
2Device complexity
If the smoke filter device is made non-detachable for structural simplicity, then device complexity is reduced, but cleaning difficulty increases
Solution Approach 1:
The patent applies segmentation by dividing the smoke filter device into a detachable smoke filter component and the range hood body. The smoke filter can be separated from the range hood for convenient cleaning and maintenance. This segmentation allows users to easily remove and clean the filter without disassembling the entire range hood, significantly improving cleaning convenience while maintaining relatively simple overall device structure.
3Ease of manufacture
If filter holes at the ends have the same area as the middle, then manufacturing is easier, but suction force at the ends is insufficient allowing smoke to escape
Solution Approach 1:
The patent applies local quality by making filter holes in the middle region have a first area while filter holes at the end regions have a second area that is smaller than the first area. This non-uniform design compensates for the weaker suction force at the ends, ensuring more uniform smoke extraction across the entire filter device and preventing smoke escape at the ends while maintaining ease of manufacture through a systematic area variation pattern.
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
Enhances smoke suction efficiency by increasing suction force at the ends, reduces noise, and facilitates easy cleaning and maintenance by allowing the filter to be folded and dishwasher-safe.
Implementation Method 1
an area defined by the filter hole near the at least one end of the oil filter section is smaller than an area defined by the filter hole near the middle portion of the oil filter section... the suction force applied to the smoke by the filter holes at two ends of each oil filter section is increased
Data Source
AI summary
The present invention discloses a smoke filter device, which comprises a plurality of oil filter sections (10), each oil filter section (10) has at least two filter holes (11); and in the two adjacent two filter holes (11), an area defined by the filter hole (11) near the at the end of the oil filter section (10) is smaller than an area defined by the filter hole (11) near the middle portion of the oil filter section (10). The present invention also discloses to a range hood with the smoke filter device. In the present invention, without changing the overall air volume, the suction force of the filter holes at the end of each oil filter section is increased, so that the smoke can be further prevented from escaping to the surrounding.