Ventilation Member With Expanded Filter Area
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Solution Overview
Problem
Ventilation members used in electrical devices face challenges in increasing gas permeation quantity and durability against foreign matter like water droplets and dust, with gas permeable filters exhibiting high resistance and design constraints limiting size adjustments.
Innovation Solution
A ventilation member design featuring a tubular part with a larger gas permeable filter area at one opening and a cover part forming gaps for gas passage, allowing increased gas permeation without altering the connection-end opening size, and incorporating spacers for protection and elastic deformation for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gas permeable filter area is increased to improve gas permeation quantity, then the gas permeation rate increases, but the device size and connection-end opening size must be changed
Solution Approach 1:
The patent changes the dimensional relationship between the filter-end opening and connection-end opening, making the filter-end opening larger in area while the connection-end opening remains the same size. This allows the gas permeable filter to have a larger effective area for gas permeation without increasing the connection interface dimensions, thus resolving the contradiction between gas permeation quantity and device size.
2Productivity
If the gas permeable filter is improved to increase gas permeation quantity, then the gas permeation rate increases, but the gas permeation resistance remains high
Solution Approach 1:
The patent segments the gas passage into multiple paths by forming plural gaps between the cover part and the gas permeable filter. This segmentation allows gas to flow through multiple parallel channels, reducing the overall gas permeation resistance while maintaining a compact filter area, thus resolving the contradiction between gas permeation quantity and gas permeation resistance.
3Productivity
If the ventilation member size is increased to improve gas permeation quantity, then the gas permeation rate increases, but the design compatibility with existing devices is lost
Solution Approach 1:
The patent applies local quality by making only the filter-end opening larger while keeping the connection-end opening size unchanged. This localized dimensional change allows the gas permeable filter to have a larger effective area for improved gas permeation, while the connection interface remains compatible with existing device designs, thus resolving the contradiction between gas permeation quantity and design compatibility.
4Reliability
If the cover part is designed to protect against foreign matter, then the durability increases, but the gas passage efficiency may be reduced
Solution Approach 1:
The patent uses the cover part with gaps that function as gas passages, creating a porous-like structure that allows gas flow while providing physical protection against foreign matter. The gaps are positioned and sized to maintain gas passage efficiency while the cover part structure blocks dust and water droplets, thus resolving the contradiction between durability and gas passage efficiency.
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 gas permeation rate and durability against foreign matter by enlarging the effective area of the gas permeable filter and providing protective gaps, while maintaining device compatibility and cost-effectiveness through optimized manufacturing processes.
Implementation Method 1
a gas permeable filter disposed at one of openings of the tubular part
Implementation Method 2
gas permeable filter having gas permeability and waterproofness
Implementation Method 3
Gaps functioning as gas passages that communicate with an exterior are formed in the attached state between the bottom portion of the cover part and the gas permeable filter
Implementation Method 4
incorporating spacers for protection and elastic deformation for secure attachment
Data Source
AI summary
A ventilation member (100) of the invention includes a tubular part (11), a gas permeable filter (19), and a cover part (31). In an attached state where the tubular part (11) is fit into the cover part (31), gaps functioning as gas passages (AR2 and AR3) are formed between a bottom portion (35) of the cover part (31) and the gas permeable filter (19) and between a side wall portion (39) of the cover part (31) and a body portion (17) of the tubular part (11). The opening area (S2) of a filter-end opening (15) with respect to an in-plane direction (WL) perpendicular to the thickness direction of the gas permeable filter (19) is larger than the opening area (S1) of a connection-end opening (13) with respect to the in-plane direction (WL).