Rotary Liquid Sprayer Angular Atomizing Surface
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Solution Overview
Problem
Existing rotary liquid atomizers for pest control and spraying tasks face issues with non-homogeneous droplet size and distribution due to irregular atomizing surfaces, which affect the efficacy of products applied to large surfaces or airspaces.
Innovation Solution
A rotary liquid sprayer using a cylindrical sheet with angular holes, preferably hexagonal, as the atomizing surface, where the holes are evenly distributed and oriented to maximize the number of issuing points per unit area, ensuring uniform ligament formation and consistent droplet sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a wire mesh or round hole pattern is used as the atomizing surface, then the device is simple to manufacture, but the droplet size and distribution are non-homogeneous
Solution Approach 1:
The atomizing surface is segmented into multiple angular forms (preferably hexagonal) with vertices distributed around the circumference. Each angular form creates a ligament at its vertex, and the segmentation into 6 or more such forms per hole pattern allows for uniform droplet distribution while maintaining manufacturing simplicity
Solution Approach 2:
The angular forms are designed with specific local geometric properties - vertices positioned at equidistant intervals around the axis of rotation, with each vertex serving as a ligament formation point. This local geometric quality ensures uniform droplet size and distribution across the entire atomizing surface
2Productivity
If the number of issuing points per unit area is increased, then the flow capacity increases, but the droplet distribution becomes less homogeneous
Solution Approach 1:
Each angular form (e.g., hexagon) provides multiple vertices that serve as issuing points. By arranging 6 or more such angular forms in a circular pattern around the axis of rotation, the system achieves high issuing point density while maintaining uniform spatial distribution, thus preserving droplet homogeneity
Solution Approach 2:
The issuing points are arranged in a two-dimensional circular pattern around the axis of rotation, with vertices positioned at specific angular intervals. This dimensional arrangement allows maximizing the number of issuing points per unit area while ensuring uniform droplet distribution through the rotational symmetry of the configuration
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 use of an angular hole pattern in the atomizing surface enhances the flow capacity and regularity of droplet formation, overcoming surface tension and achieving more consistent and efficient spray distribution across surfaces and airspaces.
Implementation Method 1
The rotational speed determines the centrifugal forces upon the liquid as it exits the perforated rotating surface of the atomiser head, causing the atomisation of the liquid
Implementation Method 2
The use of holes with vertices, preferably hexagonal holes, provides a more defined surface for liquid atomisation and hence a more regular breaking up of the liquid into droplets
Data Source
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AI summary
Rotary liquid sprayer for spraying a liquid for controlling pests onto surfaces, the rotary liquid sprayer having a spray head, a rotary atomiser, a mover for rotating the rotary atomiser around an axis, a liquid reservoir, a duct connecting the reservoir with an interior of the rotary atomiser, the rotary atomiser having an external surface with holes which connect the interior of the rotary atomiser with its exterior for atomising the liquid coming from said interior, characterised in that the external surface is formed by a cylindrical sheet, and the holes have at least an angular form formed by edges forming angles of less than 180º, the angular form between said edges being evenly distributed on the surface and equidistant with respect to the axis.