Barometer Waterproof Vent Structure for Submersion Sealing
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Solution Overview
Problem
Existing mobile phone terminal designs with internal barometers face issues with water-proofing, particularly with IPX5 ratings failing to meet water-proof requirements when submerged and IPX7 ratings compromising air permeability and barometric pressure transmission due to small apertures.
Innovation Solution
A water-proof structure with a control valve system, including a dust-proof net, water-proof mesh net, water drop detection device, and control valve, where the control valve is electrically connected to the water drop detection device to seal when a water volume threshold is reached, ensuring both air permeability and water-proofing by using ferromagnetic clapboards, electromagnets, or piezoelectric ceramic pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-proof film with high water-proof performance (IPX7 rating) is employed, then the water-proof property is improved, but the air permeability deteriorates due to overly small aperture
Solution Approach 1:
The patent employs a water-proof film as a flexible barrier that provides IPX7 water-proof protection while maintaining controlled permeability characteristics. The film is integrated into the barometer assembly, allowing it to flex and respond to pressure changes while preventing water ingress.
Solution Approach 2:
The patent changes the operational parameters of the water-proof film by applying voltage to alter its permeability characteristics. Through electro-active material properties, the film can transition between different states of permeability, allowing air passage during normal operation and blocking water under submerged conditions.
2Ease of operation
If an IPX5 water-proof rating is employed, then the air permeability is maintained, but the water-proof property deteriorates when the mobile phone terminal falls into water
Solution Approach 1:
The patent transforms the static water-proof rating into a dynamic system that can adapt its protection level based on environmental conditions. The barometer assembly with integrated water-proof film and control mechanisms can actively respond to water exposure, switching between permeable and impermeable states as needed.
Solution Approach 2:
The patent implements a feedback mechanism where the barometer monitors environmental conditions and triggers appropriate responses. When water exposure is detected, the system activates control mechanisms to seal the water-proof film, creating a closed-loop control system that maintains both air permeability during normal use and water-proof protection during submersion.
3Reliability
If the aperture of the water-proof film is reduced to improve water-proof performance, then the water-proof property is improved, but the barometric pressure transmission deteriorates due to delay
Solution Approach 1:
The patent replaces passive mechanical pressure transmission through small apertures with an active electro-active film system. The water-proof film responds to voltage changes, allowing it to maintain larger effective apertures for rapid pressure transmission during normal operation while providing active sealing when water exposure occurs, eliminating the need for small fixed apertures.
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 achieves enhanced water-proofing and air permeability, allowing for real-time barometric pressure measurement while preventing water ingress, effectively meeting IPX7 ratings even when the terminal is submerged, ensuring the barometer's sensitivity and the device's protection.
Implementation Method 1
the control valve includes two ferromagnetic clapboards and an electromagnet... the electromagnet is electrically connected to the water drop detection device, so that when receiving an electric signal from the water drop detection device, the electromagnet is electrified and drawn onto the two ferromagnetic clapboards to achieve sealing
Implementation Method 2
the control valve includes two cavity wall protrusions, two air guiding holes, and a piezoelectric ceramic piece... the piezoelectric ceramic piece is electrically connected to the water drop detection device, so that when receiving an electric signal from the water drop detection device, the piezoelectric ceramic piece deforms elastically and contacts the two cavity wall protrusions to achieve sealing
Data Source
AI summary
A water-proof structure has an internal barometer for a terminal device. The water-proof structure is an internal cavity of the terminal device. The water-proof structure is provided with an opening on a casing of the terminal device. Abarometer is arranged inside the water-proof structure. A water drop detection device is arranged between a water-proof mesh net and the barometer. The water drop detection device is electrically connected to a control valve, and when a water volume detected by the water drop detection device reaches a water volume threshold value, the control valve is closed.