Humidifying Gas Apparatus for Condensing Steam on Nuclei
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Solution Overview
Problem
Existing methods for humidifying gas and condensing steam on condensation nuclei are complex, fault-prone, and sensitive, making them unreliable for detecting small particles effectively.
Innovation Solution
A method and apparatus where gas is passed through an evaporation zone with a heated liquid duct, allowing for simple, reliable, and insensitive humidification and condensation of steam on condensation nuclei, enabling efficient particle detection by controlling steam quantity and using a closed system independent of ambient pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection means are used for small particles, then detection is not possible, but particle enlargement through steam condensation is required which complicates the system
Solution Approach 1:
The patent applies preliminary action by pre-forming condensation nuclei with a specific size distribution before the measurement process. The particle generator creates nuclei in advance that will subsequently condense steam, enabling detection without requiring complex real-time steam generation and control systems.
Solution Approach 2:
The patent uses an intermediary substance (condensation nuclei with diameter 0.01-1 μm) that mediates between the undetectable small particles and the detection system. These nuclei act as intermediate carriers that can be detected optically while still representing the original particle distribution.
2Manufacturing precision
If Sinclair-LaMer generator is used for producing monodisperse droplets, then calibration is possible, but the apparatus becomes very complicated and fault-prone
Solution Approach 1:
The patent extracts the essential function of particle size control from the complex Sinclair-LaMer generator by using a simplified particle generator that only needs to produce nuclei within a broad size range (0.01-1 μm). The precise monodisperse control is replaced by using naturally polydisperse nuclei that still achieve sufficient detection precision.
Solution Approach 2:
The patent changes the critical parameter from requiring monodisperse particle sizes to accepting polydisperse nuclei within a specific size range. This parameter change simplifies the generation process while maintaining detection capability, as the optical detection method remains effective across this size range.
3Productivity
If external cooling and turbulent mixture are used for steam condensation, then condensation efficiency is improved, but the method becomes sensitive and fault-prone
Solution Approach 1:
The patent applies self-service by allowing the condensation process to occur naturally without external cooling intervention. The steam from breath or exhalation spontaneously condenses on the condensation nuclei in the cold ambient air, eliminating the need for complex cooling systems and reducing sensitivity to operational parameters.
Solution Approach 2:
The patent utilizes the periodic nature of breath cycles to drive the condensation process. Each breath provides a periodic input of warm, moist air that naturally condenses on the nuclei, creating a self-regulating periodic condensation pattern without requiring continuous external control.
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 allows for prolonged operation, easy cleaning, and adjustable steam control, enabling detection of particles below the normal detection limit, including those in the nano-range, with a closed system that functions under various pressures and rapid particle size adjustment without the need for reheating.
Implementation Method 1
the liquid to be evaporated is brought into contact with the flow area and evaporated therein
Implementation Method 2
the steam produced is condensed on the condensation nuclei
Data Source
AI summary
For the reliable condensation of steam on condensation nuclei in an aerosol flow and therefore for enlarging the particles in the aerosol, the invention provides a method which is characterized in that condensation nuclei are passed through an inner area of an evaporating zone forming a flow area, the liquid to be evaporated is contacted with the flow area and evaporated therein and the thus produced steam is condensed on the condensation nuclei. the invention also provides an apparatus for condensing steam on condensation nuclei with an inlet for condensation nuclei and an evaporating zone constructed in such a way that a flow area for the condensation nuclei has a heated liquid duct open thereto and that a condensation flue is connected to the flow area. The invention also provides methods and apparatuses for counting particles, for producing monodisperse aerosols using the aforementioned method or the aforementioned apparatus.