Waterproof Case Breathing Holes Segmentation
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Solution Overview
Problem
Waterproof cases with filter breathing holes can experience water accumulation, leading to potential water ingress and negative pressure issues due to the collection of water in depressions formed by the water-repellent filter and filter fixing parts, which compromises the waterproofness and air circulation.
Innovation Solution
A waterproof case design featuring multiple breathing holes distributed across different surfaces and covered by a breathable waterproof filter, which reduces the likelihood of all holes being closed by water and minimizes water ingress, while maintaining air circulation and enhancing waterproofness by ensuring equal internal and external atmospheric pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single filter breathing hole is provided in the cover, then the waterproofness can be maintained and air circulation can occur, but water may be collected in the depression formed by the water-repellent filter and filter fixing part, causing water to soak into the filter and enter the case
Solution Approach 1:
The patent divides a single filter breathing hole into multiple smaller breathing holes arranged in an array pattern. This segmentation reduces the likelihood that all holes will be simultaneously closed by water, preventing water accumulation in depressions while maintaining air circulation and waterproofness.
2Reliability
If the filter breathing hole is closed with water, then the waterproofness is maintained, but the inside or outside temperature of the case changes, causing negative pressure and water to be drawn into the case
Solution Approach 1:
By providing multiple breathing holes instead of a single hole, the patent ensures that even if some holes are closed by water, others remain open to allow air exchange. This prevents negative pressure buildup during temperature changes while maintaining waterproofness through the water-repellent filter.
3Reliability
If multiple breathing holes are provided in different positions, then the possibility of all holes being closed by water is reduced, but the device complexity increases
Solution Approach 1:
The patent combines multiple breathing holes into a unified array pattern on the filter, treating them as a single functional unit. This merging approach maintains the reliability benefits of multiple holes while simplifying the overall structure and reducing device complexity compared to having separate, distributed hole assemblies.
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 effectively reduces the risk of water entering the case and maintains air circulation, thereby enhancing the waterproofness and functionality of the case, especially when used for electronic components like engine ECU, by distributing breathing holes and using a breathable filter to manage pressure and prevent water accumulation.
Implementation Method 1
a water-repellent filter is placed on the filter welding surface and is rounded inside while the projection is melted to form the filer fixing part, thereby being fixed
Implementation Method 2
by providing the filter breathing hole formed in the cover with the water-repellent filter, it is possible to hold the waterproofness of the case and to circulate air between the inside and the outside of the case
Data Source
AI summary
A waterproof case for housing an electronic component includes a case member that has a plurality of breathing holes, and a breathable waterproof filter fitted to the case member at a position corresponding to the breathing holes to cover the breathing holes. For example, open surfaces of at least two of the breathing holes, opened outside of the case member, can be made to face in different directions. Furthermore, the breathing hole has an open area on a side of the breathable waterproof filter, which is larger than an open area of the breathing hole on a side opposite to the breathable waterproof filter, in the case member. Accordingly, the waterproof case enhances waterproofness while circulating air between the inside and the outside of the waterproof case.