Test Gas Applicator With Porous Membrane Diffusion
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Solution Overview
Problem
Conventional test gas applicators for vacuum leak detection require pressurized test gas and result in excessive gas usage and diffusion challenges, making it difficult to locate leaks due to large test gas clouds.
Innovation Solution
A test gas applicator with a housing containing a test gas volume surrounded by a membrane material that allows test gas to diffuse through, eliminating the need for pressurization and enabling continuous, localized test gas release for leak detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pressurized test gas is used in conventional applicators, then test gas can be delivered continuously, but excessive test gas is applied and the reservoir requires pressure filling
Solution Approach 1:
The patent employs a porous membrane material at the test gas outlet that allows controlled diffusion of test gas from the reservoir to the external environment. The porous structure enables continuous gas delivery through diffusion gradients while limiting the total amount of gas consumed, eliminating the need for pressurized reservoirs and excessive gas application.
Solution Approach 2:
The invention changes the delivery mechanism from pressure-driven flow to diffusion-driven transport. By utilizing concentration gradients across a porous membrane rather than pressure differentials, the system achieves continuous test gas delivery with significantly reduced gas consumption and without requiring pressurized storage.
2Reliability
If large amounts of test gas are applied, then the test gas cloud is more detectable, but it becomes difficult to locate the specific leak position
Solution Approach 1:
The porous membrane outlet creates a localized test gas release point rather than a dispersed spray. The test gas diffuses through the porous material in a controlled manner, creating a concentrated gradient at the outlet surface that enhances detection reliability while maintaining precise localization capability, as the gas source remains confined to the small outlet area.
3Duration of action of moving object
If pressurized test gas reservoir is used, then continuous supply is ensured, but complex pressure reduction technology is required
Solution Approach 1:
The system utilizes the natural diffusion property of gases through porous materials to achieve continuous supply without external pressure control mechanisms. The concentration gradient between the reservoir interior and external environment automatically drives gas flow, eliminating the need for pressure reduction technology while ensuring sustained test gas delivery.
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
This solution allows for efficient, continuous test gas application without pressurization, focusing the test gas concentration near the outlet, facilitating easier leak detection by moving the applicator along the test object.
Implementation Method 1
The test gas outlet (24) has a membrane material (28) such that the test gas diffuses through the membrane material (28)
Implementation Method 2
The test gas outlet (24) has a membrane material (28) such that the test gas diffuses through the membrane material (28) and/or permeates through the membrane material (28)
Data Source
AI summary
The invention relates to a test gas applicator (10) for the administration of test gas on a test subject which is to be examined for the presence of a leak, said applicator having a housing (12) enclosing a test gas volume (14), which housing has a test gas outlet (24) having a membrane material (28) through which the test gas diffuses and/or permeates.