Gas Analyzer Valve and Filter Layout for Clean Rapid Sampling
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Solution Overview
Problem
Existing analyzers for measuring substance concentration in gas mixtures, such as breath alcohol, suffer from reliability issues over time and are prone to contamination and interference due to particle ingress, leading to inaccurate results.
Innovation Solution
The analyzer incorporates a detachable input unit with a filter located in the fluid guide unit, a suction unit, and a valve that isolates the measurement chamber from the environment, along with a mechanical connecting element to synchronize suction and valve operation, ensuring reliable and hygienic sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is installed in the fluid guide unit to prevent particle contamination, then measurement reliability is improved, but pneumatic resistance increases
Solution Approach 1:
The patent implements a dynamically replaceable filter system where the filter can be automatically exchanged when clogged. The filter is positioned in the fluid guide unit and can be replaced via a replacement element that allows automatic filter exchange during operation, maintaining optimal pneumatic resistance over time while ensuring continuous reliable measurement.
Solution Approach 2:
The filter is designed as a consumable component that is periodically discarded and replaced. The system includes mechanisms to detect filter status and enable automatic replacement, allowing the filter to be discarded when saturated with particles and replaced with a fresh one, thereby maintaining measurement reliability without permanent increase in pneumatic resistance.
2Productivity
If the measurement chamber is continuously open for rapid sampling, then sampling speed is improved, but contamination from environmental particles increases
Solution Approach 1:
The patent extracts the harmful environmental particles from the gas sample path by positioning the filter in the fluid guide unit between the environment and the measurement chamber. This allows the measurement chamber to remain accessible for rapid sampling while the filter prevents particles from entering and contaminating the measurement chamber during sampling operations.
Solution Approach 2:
The filter acts as an intermediary component in the fluid guide unit that mediates between the external environment and the measurement chamber. It allows gas flow for sampling while blocking particle contamination, enabling rapid sampling without direct exposure of the measurement chamber to environmental contaminants.
3Device complexity
If the input unit is permanently connected to the main body to simplify structure, then device complexity is reduced, but hygiene requirements become harder to comply with
Solution Approach 1:
The patent segments the input unit from the main body, allowing the input unit to be detachably connected and removed. This segmentation enables the input unit to be easily removed and replaced for hygiene purposes while maintaining a relatively simple overall structure. The detachable connection allows the input unit to be separated, cleaned, or replaced without disassembling the entire device.
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 design enhances reliability by minimizing contamination, reduces pneumatic resistance, and allows for efficient, rapid sampling, providing accurate and hygienic measurement of substance concentration without the need for frequent filter replacement.
Implementation Method 1
A filter is located in the fluid guide unit between the suction opening and the valve. The filter filters out particles from a gas sample flowing through the fluid guide unit and through the filter toward the measurement chamber.
Implementation Method 2
A suction unit in the interior of the main body can carry out the following steps: The suction unit sucks in a gas sample from a gas mixture flowing through the input unit, i.e. branches off the gas sample from the gas mixture.
Implementation Method 3
A valve in the interior of the main body can be moved into a closing end position and into a releasing end position. In the closing end position, the valve closes the fluid guide unit such that no fluid connection is established between the measurement chamber on the one hand and the surrounding environment
Data Source
AI summary
The disclosure relates to an analyzer which is configured to analyze a gas mixture for a specified substance. A tubular input unit can be connected to a main body. A gas mixture can be introduced into the input unit and flows from an inlet to an outlet. A fluid guide unit connects a suction opening in the input unit to a measurement chamber. A suction unit can suck in a gas sample from the input unit by suction and can convey it through the fluid guide unit into the measurement chamber. A sensor can measure the concentration of the substance in a gas sample located in the measurement chamber. A valve optionally opens or closes the fluid guide unit. An electrostatically charged and/or mechanically acting filter in the fluid guide unit is located between the suction opening and the valve.