Floating Membrane Pressure Relief Valve for Packaging Containers
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Solution Overview
Problem
Existing pressure relief valves for packaging containers often fail to effectively seal and quickly respond to pressure changes, allowing oxygen to penetrate and not closing reliably after pressure equalization, which can compromise the quality of packaged goods.
Innovation Solution
A pressure relief valve design featuring a base body with a sealing surface, a first membrane partially covering the surface, and a second membrane floating on the first, utilizing a fluid like silicone oil to enhance sealing and mobility, ensuring rapid closure and minimal oxygen diffusion through the use of a capillary effect and optimized membrane dimensions and thickness ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a pressure relief valve is used to allow gas escape, then pressure equalization is achieved, but sealing reliability deteriorates and oxygen ingress occurs
Solution Approach 1:
The patent employs a flexible membrane that can deform in response to pressure differences. The membrane seals the through-opening when pressure equalizes and automatically opens when overpressure occurs, providing reliable sealing without complex mechanical structures.
Solution Approach 2:
The patent uses a liquid-filled chamber where the membrane separates gas phases. The liquid transmits pressure forces to control membrane movement, enabling automatic opening and closing based on pressure differential without mechanical linkages.
2Reliability
If the membrane is made more rigid to improve sealing, then sealing effect improves, but response speed to pressure changes deteriorates
Solution Approach 1:
The patent optimizes the membrane's physical parameters including thickness, material composition, and pre-tensioning to achieve the right balance between flexibility for rapid response and sufficient rigidity for effective sealing. The membrane properties are tuned specifically for the application requirements.
3Productivity
If the through-opening is made larger to improve gas escape, then pressure release speed improves, but sealing reliability deteriorates
Solution Approach 1:
The flexible membrane dynamically adjusts the effective opening size based on pressure conditions. At normal pressure, the membrane completely seals the opening. At overpressure, it deflects to create a controlled gas escape path, optimizing both sealing and pressure release performance.
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 provides improved sealing and faster response to pressure changes, preventing oxygen ingress and ensuring reliable operation by maintaining a tight seal and efficient gas release, thus maintaining the quality of packaged goods.
Implementation Method 1
The fluid causes adhesion, causing the first diaphragm to stick to the sealing surface and thus seal the passage opening
Implementation Method 2
Capillary action further ensures that the fluid is evenly distributed between the sealing surface and the first diaphragm
Implementation Method 3
the capillary effect also prevents the fluid from flowing out through the passage opening
Implementation Method 4
the adhesive force of the fluid pulls the first diaphragm back towards the sealing surface, closing the gas channel
Data Source
Figure 1~2
Figure 3~4
AI summary
Overpressure valve of a packaging container, comprising: a base body (2) with an edge region (3) and with a sealing surface (4), wherein the edge region (3) can be sealedly connected to a wall (10) of a packaging container (100), and wherein at least one through-opening (51) is formed in the sealing surface (4), which extends through the base body (2), a first diaphragm (6) which is arranged over the through-opening (51) and at least partially covers the sealing surface (4), a second diaphragm (7) which at least partially covers the first diaphragm (6), and a fluid (8) which is applied to the sealing surface (4) and by means of which the first diaphragm (6) is held floating on the sealing surface (4).