Venturi Internal Structure for Fine Bubble Generation at Low Flow
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Solution Overview
Problem
Existing fluid characteristic changing apparatuses face limitations in generating fine bubbles without increasing flow rate and require gas injection, and they often fail to simultaneously produce microbubbles and ultrafine bubbles effectively.
Innovation Solution
The apparatus incorporates a housing with a first internal structure featuring a hollow venturi tube for generating microbubbles and a second internal structure with protrusions for creating ultrafine bubbles, allowing for efficient bubble generation without increasing flow rate and enabling simultaneous production of both bubble sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas injection is used to generate fine bubbles, then bubble generation capability is improved, but device complexity increases
Solution Approach 1:
The invention extracts and eliminates the gas injection system from the apparatus, replacing it with a pure mechanical structure consisting of a venturi tube and protrusions that generate fine bubbles through fluid dynamics alone, thereby simplifying the device while maintaining bubble generation capability
Solution Approach 2:
The apparatus uses the kinetic energy and pressure differential of the flowing fluid itself to generate fine bubbles through the venturi effect and protrusion interaction, without requiring external gas injection systems, making the system self-sufficient and simpler
2Quantity of substance
If flow rate is increased to generate more fine bubbles, then fine bubble quantity is improved, but energy consumption increases
Solution Approach 1:
The invention changes the physical parameters of fluid flow by creating a venturi section with varying cross-sectional area, which transforms pressure energy to kinetic energy and back, generating fine bubbles through pressure differential without requiring increased flow rate or energy input
Solution Approach 2:
The protrusions on the inner wall create localized turbulence and vortex formation that enhances fine bubble generation through mechanical disturbance of the fluid, allowing efficient bubble production at constant flow rate
3Device complexity
If a single internal structure is used, then device simplicity is improved, but bubble size control capability deteriorates
Solution Approach 1:
The invention applies local quality by creating different geometric features (venturi section with specific curvature and protrusions at specific positions) within a single internal structure, where each local feature contributes to different aspects of bubble generation, enabling both microbubbles and ultrafine bubbles to be produced simultaneously while maintaining overall structural simplicity
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 configuration enables the generation of a large amount of fine bubbles, enhancing cleaning and cooling effects, and can be used as a coolant, sterilizing agent, or heat transfer fluid without increasing flow rate, and can produce microbubbles and ultrafine bubbles simultaneously.
Implementation Method 1
The first internal structure has a flow characteristic providing portion having a structure of at least one hollow venturi tube
Implementation Method 2
a flow phenomenon in which an impact force (continuous vibration) occurs when pressure is applied to the cavity of the microbubble and is destroyed is called cavitation
Implementation Method 3
The second internal structure is in the form of a hollow shaft, accommodates at least a portion of the first internal structure inside the hollow shaft, and has a body portion having a plurality of protrusions formed on an outer surface thereof
Data Source
Figure 1~2
Figure 3~4
Figure 5~6(B)
AI summary
Provided are an internal structure capable of generating fine bubbles without increasing a flow rate, a flow characteristic changing apparatus, and a utilization apparatus thereof. An internal structure which is accommodated in a housing 110 and configured to change characteristics of a fluid with respect to the fluid includes a first internal structure 140 and a second internal structure 240. The first internal structure has a flow characteristic providing portion having a structure of at least one hollow venturi tube. The second internal structure is in the form of a hollow shaft, accommodates at least a portion of the first internal structure inside the hollow shaft, and has a body portion having a plurality of protrusions formed on an outer surface thereof.