Air Tightness Testing via Dynamic and Static Pressure Segmentation
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Solution Overview
Problem
Existing air tightness testing methods for devices like spring probe modules are inadequate as they do not accurately differentiate between dynamic and static air tightness, leading to inconsistent results and potential assembly issues during manufacturing.
Innovation Solution
A method and device that utilize a testing chamber, storage chamber, negative pressure generator, and pressure gauges to apply and measure negative pressure dynamically and statically, determining air tightness by comparing pressure values before and after pressure cessation, ensuring both dynamic and static air tightness are assessed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single pressure measurement method is used to test air tightness, then the testing process is simple, but the accuracy of differentiating dynamic and static air tightness is insufficient
Solution Approach 1:
The patent divides the air tightness testing process into two distinct stages: dynamic air tightness testing (during negative pressure supply) and static air tightness testing (after negative pressure cessation). This segmentation allows each stage to be measured independently with appropriate pressure measurement methods, improving overall measurement accuracy while maintaining manageable process complexity through clear procedural separation.
Solution Approach 2:
The patent performs dynamic air tightness measurement first (while negative pressure is being supplied), then proceeds to static air tightness measurement after pressure cessation. This preliminary action sequence ensures that the more sensitive dynamic measurement is conducted under optimal conditions before transitioning to the static phase, thereby improving overall measurement precision without significantly increasing complexity.
2Reliability
If traditional air tightness testing is performed, then the testing process is quick, but the results are inconsistent and may lead to assembly issues
Solution Approach 1:
The patent introduces dynamic air tightness testing by conducting pressure measurements during the actual negative pressure supply process, rather than only after pressure stabilization. This dynamic approach captures real-time leakage characteristics, significantly improving result reliability and reducing false positives that would require retesting, thereby offsetting the additional time investment with higher first-pass yield.
Solution Approach 2:
The patent replaces traditional single-point mechanical pressure measurement with a dual-phase measurement system that captures pressure data both during negative pressure application and after cessation. This substitution provides more comprehensive diagnostic information, improving result reliability by distinguishing between different types of leakage issues and reducing assembly problems.
3Reliability
If only static air tightness is tested, then the testing procedure is simple, but dynamic air tightness issues during operation are not detected
Solution Approach 1:
The patent implements periodic action by conducting pressure measurements at two distinct periods: during the negative pressure supply cycle (dynamic phase) and after pressure cessation (static phase). This periodic measurement approach ensures both operational and stationary air tightness conditions are evaluated, improving reliability without requiring a completely complex continuous monitoring system.
Solution Approach 2:
The patent changes the operational parameter from static-only pressure measurement to dynamic-pressure measurement by capturing pressure values during active negative pressure supply. This parameter change enables detection of air tightness issues that only manifest under operational conditions, significantly improving reliability while the added complexity remains manageable through standardized measurement protocols.
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 approach provides accurate and reliable air tightness testing by distinguishing between qualified and unqualified air tightness in both dynamic and static conditions, ensuring precise assembly and performance of electronic devices.
Implementation Method 1
supplying a negative pressure to the storage chamber
Implementation Method 2
measuring a pressure in the storage chamber or the testing chamber to obtain a first pressure value
Data Source
AI summary
A method for testing air tightness includes connecting a testing chamber and a storage chamber, supplying negative pressure to the storage chamber, measuring the pressure in the storage or testing chamber to obtain a first pressure value, determining air tightness of the testing chamber according to the negative pressure and the first pressure value, stopping the negative pressure to the storage chamber, measuring the pressure in the storage chamber to obtain a second pressure value, measuring the pressure in the storage chamber after stopping the negative pressure to the storage chamber to obtain a third pressure value, and determining air tightness of the testing chamber according to the second and third pressure values. The device includes testing and storage chambers, a negative pressure generator, and a pressure gauge connected to the storage chamber, which is connected to the testing chamber. The negative pressure generator is connected to the storage chamber.