Microbubble Generator Slit Structure for Low-Pressure Vacuum Formation
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Solution Overview
Problem
Existing bubble generators face challenges in achieving high microbubble generating efficiency, particularly in creating sufficient vacuum areas to produce a substantial amount of microbubbles in water flows without the need for external pressure or pumps.
Innovation Solution
The bubble generator design incorporates a tubular main body with radially extending slits and protruding columns that gradually reduce in protrusion towards the upstream side, along with recesses on the downstream surfaces, to create multiple vacuum areas, enhancing flow velocity and microbubble production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If columns protrude from the inner peripheral surface to form slits, then microbubble generation is improved, but the structure becomes more complex and manufacturing difficulty increases
Solution Approach 1:
The bubble generating part is segmented into multiple columns that protrude from the inner peripheral surface, creating multiple slits between them. This segmentation allows water flow to be divided into multiple paths, increasing the surface area for vacuum area formation and microbubble generation while maintaining a relatively simple overall structure.
Solution Approach 2:
The columns are designed with varying protrusion amounts in the flow direction, creating a three-dimensional structure where the protrusion amount gradually changes from upstream to downstream. This dimensional variation optimizes flow compression and vacuum area formation without requiring complex multi-component assembly.
2Productivity
If the protrusion amount of columns is increased to enhance flow compression, then microbubble generation is improved, but water flow resistance increases and flow velocity decreases
Solution Approach 1:
The column protrusion amount is designed to dynamically vary along the flow direction, with larger protrusions upstream and smaller protrusions downstream. This dynamic configuration optimizes flow compression at different stages: larger upstream protrusions provide initial compression, while smaller downstream protrusions maintain flow velocity and prevent excessive resistance.
Solution Approach 2:
Different sections of the bubble generating part have different column protrusion characteristics. The upstream side has columns with larger protrusion amounts for strong flow compression and vacuum area formation, while the downstream side has columns with smaller protrusion amounts to maintain flow velocity and reduce resistance.
3Productivity
If recesses are added to the downstream-side surfaces of columns, then vacuum area formation is improved, but manufacturing complexity increases
Solution Approach 1:
The recesses are integrated into the column structure as a single monolithic component rather than being added as separate parts. This merging of features allows the recesses to be formed simultaneously with the columns during molding, reducing assembly steps and manufacturing complexity while still providing the desired vacuum area formation function.
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 effectively generates a high number of microbubbles in water flows, even at low pressures, without the need for external pumps, improving microbubble generating efficiency and stability.
Implementation Method 1
a vacuum area is created downstream from the restrictor according to Bernoulli's principle, and gases dissolved in the water are released due to a cavitation effect
Implementation Method 2
gases dissolved in the water are released due to a cavitation effect (effect of reduced pressure) so that microbubbles are generated
Data Source
AI summary
The purpose of the present disclosure is, in a bubble generating device provided with a bubble generating unit for generating minute bubbles in water flowing through the inside of the cylindrical main body unit, to improve the bubble generating efficiency of the bubble generating unit. Provided is a bubble generating device provided with a cylindrical main body unit and a bubble generating unit disposed within the main body, wherein: the bubble generating unit is provided with slits extending radially centered on one point within the main body unit in a cross-sectional plane of the main body unit, and a column part protruding from the inner peripheral surface of main body unit and formed on the peripheral edge of the slits; and the amount of protrusion of the column part is gradually reduced toward the upstream side from the peripheral edges of the slits, and the column part has a recessed part formed on the downstream surface.