Dual-Mode High Pressure Diffuser for Microbial Sampling
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Solution Overview
Problem
Current methods for microbial detection in compressed gases are inaccurate due to susceptibility to ambient air, gas loss during sampling, and complexity in maintaining constant gas velocity, and existing samplers lack the ability to decompress high-pressure gases to atmospheric pressure.
Innovation Solution
A dual-mode high pressure diffuser with a separated sampling head and main frame, featuring a petri dish holder, gas diversion blocking plug, sieve plate, pressure sensors, and valves for controlled microbial collection and gas diffusion, allowing for flexible and simple operation and decompression of high-pressure gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the contact-plate method is used for microbial detection, then the operation is simple, but the test result deviates significantly from reality due to susceptibility to ambient air
Solution Approach 1:
The device is divided into a sampling head portion and a main body portion that can be separated. The sampling head contains a petri dish holder that can be directly connected to the gas source, creating an isolated sampling environment that prevents ambient air contamination while maintaining simple operation.
Solution Approach 2:
A sterile connection interface acts as an intermediary between the high-pressure gas source and the petri dish sampling environment. This intermediary maintains sterility and prevents ambient air from entering the sampling path, thereby improving detection accuracy without complicating the operation.
2Measurement precision
If the sterile membrane method is used for microbial detection, then the sampling process retains microorganisms on the filter membrane, but a large part of the gas is discharged from the exhaust port affecting detection accuracy
Solution Approach 1:
The device allows dynamic switching between two modes: constant pressure mode for microbial collection and high pressure gas diffuser mode. This dynamic capability enables the system to adapt to different detection needs, improving microorganism retention while minimizing unnecessary gas discharge.
Solution Approach 2:
The device can change operating parameters between two distinct modes. In constant pressure mode, the system optimizes for microorganism collection efficiency. In high pressure gas diffuser mode, it handles gas flow differently. This parameter change allows the system to achieve better microorganism retention without excessive gas loss.
3Measurement precision
If the vacuum filtration enrichment method is used for microbial detection, then it combines advantages of other methods, but various experimental consumables need to be prepared and the operation process is complicated
Solution Approach 1:
The device integrates multiple functions into a single instrument: it can perform both constant pressure microbial collection and high pressure gas diffusion. This multi-functionality eliminates the need for multiple separate experimental setups and consumables, reducing operational complexity while maintaining detection accuracy.
Solution Approach 2:
The sampling head portion with petri dish holder and the main body portion with pressure control systems are merged into a single integrated device. This combination allows the system to perform multiple detection functions without requiring separate experimental consumables and procedures, thereby simplifying the operation process.
4Ease of operation
If existing gas samplers are used for compressed gas sampling, then they can be directly connected to compressed gas, but they only have single sampling function and cannot decompress high-pressure gas to atmospheric pressure gas
Solution Approach 1:
The device integrates multiple functions into a single instrument: it can perform both constant pressure microbial collection and high pressure gas diffusion. This multi-functionality eliminates the need for multiple separate experimental setups and consumables, reducing operational complexity while maintaining detection accuracy.
Solution Approach 2:
The device allows dynamic switching between two modes: constant pressure mode for microbial collection and high pressure gas diffuser mode. This dynamic capability enables the system to adapt to different detection needs, improving microorganism retention while minimizing unnecessary gas discharge.
Data Source
AI summary
A dual-mode high pressure diffuser includes a sampling head lower housing and a sampling head upper housing, a top of the sampling head lower housing is provided with a petri dish holder; the sampling head upper housing is respectively provided with a gas diversion blocking plug and a gas diversion sieve plate at the top and bottom, a gas pipe connector is connected to a through-wall gas connector via a pipe, the through-wall gas connector is connected to a T-type gas connector, the T-type gas connector is connected to a pressure sensor and a safety valve at two ends, the safety valve is connected to a flow sensor, the flow sensor is connected to a pressure reducing valve, the pressure reducing valve is connected to a proportional valve; and the proportional valve is connected to adapter block.