Portable Gas Analysis Device with Flow Reversal
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Solution Overview
Problem
Conventional portable gas analysis devices for highly volatile compounds are cumbersome, maintenance-intensive, and require interruptions in the search for higher concentration locations due to separate measurement paths and valves, leading to inefficiencies in spatially resolved measurements in large areas.
Innovation Solution
A portable gas analysis device with a viewfinder and separation measurement path, where the gas flow direction is reversed by a control element to allow continuous detection of volatile compounds, enabling simultaneous search and concentration measurement without the need for additional valves, using blower units and pressure differences to control gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate measuring paths with separate openings, blowers, valves, and lines are used for simultaneous measurement, then measurement speed is improved, but device weight and maintenance complexity increase
Solution Approach 1:
The patent merges the search measuring path and separation measuring path into a single integrated device with a shared sample gas inlet opening and exhaust air opening. The control element dynamically routes sample gas between the two measuring paths without requiring separate openings, blowers, or valves for each path, thus reducing structural complexity while maintaining simultaneous measurement capability.
Solution Approach 2:
The patent uses a control element that can dynamically switch the gas flow direction to reverse the gas flow in the connecting path. This dynamic control allows the same physical infrastructure to serve multiple measurement functions, eliminating the need for static separate measuring paths and reducing overall device complexity.
2Adaptability or versatility
If separate measuring paths with separate valves are used for each measuring mode, then measurement functionality is improved, but device maintenance intensity increases
Solution Approach 1:
The control element serves multiple functions: it directs sample gas to either the search measuring path or the separation measuring path, and it can reverse gas flow in the connecting path. This multi-functionality eliminates the need for multiple separate valves, reducing maintenance requirements while preserving full measurement versatility.
Solution Approach 2:
The patent combines the valve functions into a single control element that manages gas flow for both measuring modes. By merging what would traditionally require multiple separate valves into one component, the device requires less maintenance while maintaining the ability to perform both search and separation measurements.
3Measurement precision
If the gas flow is interrupted for individual concentration measurement, then measurement accuracy is improved, but search speed and productivity decrease
Solution Approach 1:
The patent enables continuous operation of both search and separation measurements by using the control element to dynamically route sample gas between measuring paths without interrupting the overall measurement process. The system can switch between modes or perform both simultaneously, eliminating idle time and maintaining continuous useful action.
Solution Approach 2:
The dynamic control element allows the system to adaptively switch between search and separation measurement modes based on real-time requirements. This dynamic capability ensures that measurement accuracy is maintained when needed while minimizing interruptions to search operations, thereby preserving productivity.
4Adaptability or versatility
If multiple valves and flow control elements are used for path switching, then measurement flexibility is improved, but device wear and reliability decrease
Solution Approach 1:
The control element is designed as a multi-functional component that handles all path switching and flow reversal operations. By consolidating what would traditionally require multiple valves into a single robust component, the device achieves the necessary path switching flexibility while reducing mechanical wear and improving reliability.
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 the compactness, speed, and reduced wear of the device, allowing for rapid measurement of individual concentrations in less than 30 seconds, while maintaining continuous search capabilities and reducing maintenance needs.
Implementation Method 1
the control element is designed to reverse the gas flow in the connecting path such that, in the reverse direction, a portion of a sample gas mixture entering at the sample inlet opening flows via the connecting path into the separation measuring path
Data Source
Figure 1a
Figure 1b~1c
Figure 2a
AI summary
The invention relates to a portable gas-analysis device for conducting a gas flow, in particular for highly volatile compounds, comprising a search measurement path (2) and a separation measurement path (4). According to the invention, the search measurement path (2) extends from a sample gas inlet opening (20) to a first exhaust air opening (21), wherein a connection path (3) branches from the search measurement path (2) to a separation measurement path (4), and this separation measurement path (4) extends from the connection path (3) to a second exhaust air opening (41) and is connected to a carrier gas inlet opening (40), wherein the gas-analysis device (1) has a control element (5, 23, 43, 44) designed for reversing the gas flow in the connection path (3). By means of the invention, multi-structures are avoided in the gas-analysis device. A compact and quick gas-analysis device is created, which has little wastage and wear.