Double-Channel Gas Sampling Water Removal Device
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Solution Overview
Problem
Current water removal methods for gas sampling in medical equipment, such as dehydration cups, face challenges with service life and cost, and existing devices lack effective mechanisms for managing liquid water in gas streams, leading to measurement precision issues and equipment damage.
Innovation Solution
A water removal device with a double-channel structure, incorporating a dehydration cup, absolute pressure sensor, flow sensor, feedback control unit, and a sucking pump, along with a water tank and gas pressure switch, to efficiently separate and remove liquid water from the gas stream, optimizing gas utilization and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dehumidification tubs are used for water removal, then water removal effectiveness is improved, but service life is shortened and cost increases
Solution Approach 1:
The gas sampling system is divided into two separate channels: a first channel for detection and a second channel for water removal. This segmentation allows the detection gas to bypass the dehydration cup, preventing water accumulation that would shorten service life, while the second channel handles water removal independently.
Solution Approach 2:
A dehydration cup is introduced as an intermediary component specifically in the second channel to handle water removal. This mediator absorbs water from the gas stream without affecting the detection channel, extending the service life of detection components while maintaining effective water removal.
2Quantity of substance
If flow of the second channel is reduced to increase gas utilization, then gas utilization is improved, but water removal speed decreases
Solution Approach 1:
The system segments water removal and detection functions into separate channels. The second channel is dedicated to water removal with optimized flow for maximum efficiency, while the first channel handles detection with full gas utilization. This segmentation resolves the contradiction by allowing each channel to operate at optimal flow rates for its specific function.
3Productivity
If flow of the second channel is increased to quicken water removal, then water removal speed is improved, but gas utilization decreases
Solution Approach 1:
By segmenting the gas flow into two channels, the system allows the second channel to operate at high flow rates for rapid water removal without compromising the detection channel. The first channel receives the necessary gas flow for accurate detection, thus maintaining gas utilization while achieving fast water removal.
4Quantity of substance
If flow of the second channel is too low, then gas utilization is improved, but water cannot fall into the cup due to water tension
Solution Approach 1:
The system changes the flow rate parameter in the second channel to an optimal value that overcomes water surface tension and enables water to fall into the dehydration cup. This parameter adjustment ensures reliable water removal while maintaining acceptable gas utilization in the detection channel.
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 effectively removes liquid water from gas streams, improving real-time water removal performance, increasing gas utilization, and reducing costs by using a single flow sensor and negative feedback control, while maintaining equipment integrity.
Implementation Method 1
a hydrophobic membrane located between the upper lid and the lower lid
Implementation Method 2
the pressure sensor is configured to detect a gas pressure value within the first channel and the second channel
Implementation Method 3
the flow sensor is configured to monitor the total gas flow of the first channel and the second channel in real time
Implementation Method 4
a sucking pump mounted in the main channel
Implementation Method 5
the feedback control unit control the working state of the sucking pump according to the monitoring data of the pressure sensor and the flow sensor
Implementation Method 6
the dehydration cup is provided with a drain hole, the water tank is mounted below the dehydration cup in a sealed manner, and the drain hole is communicated to the water tank
Data Source
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AI summary
The present invention relates to a water removal device, method and system for gas sampling. The water removal device comprises a dehydration cup, a gas chamber, a pressure sensor, a flow sensor, a feedback control unit, a main channel and a sucking pump. The feedback control unit controls the working state of the sucking pump according to monitoring data of the pressure sensor and the flow sensor. The water removal device, method and system for gas sampling have the advantages that a double-channel gas sampling structure is adopted so that liquid water in a gas course can be removed effectively. By the adoption of an atmospheric pressure switch structure, no gas flow will pass through a second channel under normal circumstances, and the utilization of sampled gas is increased.