Pressure Sensor Filter Shielding Against Moisture Clogging
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Solution Overview
Problem
Conventional gauge pressure sensors face issues with clogging due to moisture and dust entering through the atmospheric opening, which can lead to failure and decreased detection accuracy, and have complex internal structures that are difficult to simplify.
Innovation Solution
A pressure sensor design featuring a housing with a concave portion and a through hole covered by a water-repellent filter, where the filter is positioned internally and protected by a cover with a simple rectangular shape, preventing direct exposure to the atmosphere and reducing the risk of clogging while maintaining a straightforward structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water repellent filter is exposed to the outside to maintain atmospheric pressure, then the filter can perform its function, but it may clog due to water or dust that cannot be fully repelled
Solution Approach 1:
The patent introduces a cover as an intermediary component that mediates between the external environment and the filter. The cover includes a through-hole that allows atmospheric pressure equalization while the filter remains protected inside the housing. This intermediary structure prevents direct exposure of the filter to harmful external factors like water and dust, solving the contradiction between maintaining filter function and preventing clogging.
2Object-affected harmful factors
If the filter is protected from direct exposure to the atmosphere, then clogging is prevented, but the structure becomes complicated
Solution Approach 1:
The patent segments the housing into distinct functional regions: a housing part containing the pressure detector, a concave portion providing space for the filter, and a cover with a through-hole. This segmentation allows each component to perform its specific function independently - the cover handles atmospheric communication while the filter remains protected in the concave portion. The segmentation simplifies the overall structure by assigning specific roles to each part rather than requiring a complex integrated design.
Solution Approach 2:
The cover acts as an intermediary component that simplifies the structure by providing a dedicated atmospheric opening mechanism. Instead of designing complex internal passages within the housing, the cover with its through-hole serves as a simple mediator that allows atmospheric pressure equalization while keeping the filter protected. This intermediary approach reduces structural complexity compared to designing elaborate internal flow paths.
3Object-affected harmful factors
If a filter is mounted on the atmospheric opening hole to prevent moisture and dust, then protection is provided, but the structure becomes complex and assembly is difficult
Solution Approach 1:
The patent merges the cover and filter into an integrated assembly where the filter is positioned within the concave portion of the housing and the cover with its through-hole is mounted over the concave portion. This merging of components simplifies manufacturing and assembly - the filter and cover can be assembled together as a unit and then installed as a single assembly into the housing, reducing the number of separate assembly steps compared to mounting a filter directly on an opening hole.
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 effectively prevents clogging of the filter by shielding it from moisture and dust, ensuring accurate pressure detection while simplifying the sensor's structure and improving assembly ease.
Implementation Method 1
a water repellent filter is exemplified as a filter
Data Source
AI summary
Provided is a pressure sensor including: a housing portion including a housing part housing a pressure sensor module, a concave portion facing the housing part across an inner wall, and a through hole part formed in the inner wall; a filter covering the through hole part; and a cover mounted on the housing portion while covering the concave portion and including cutout parts. The concave portion includes a bottom surface that is one surface of the inner wall, and two side surfaces perpendicular to the bottom surface and opposed to each other. The cover is formed with a rectangular upper plate and two rectangular side plates continuous with edges of the upper plate in a vertical direction and opposed to each other. The upper plate is arranged to face the bottom surface. The two side plates are arranged between the two side surfaces opposed to each other.