Spray Head with Subdivided Annular Gas Duct for Uniform Atomization
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Solution Overview
Problem
Existing spray devices struggle with uniform mixing and fine droplet formation of components, often resulting in sticking or contamination, and require excessive compressed gas for high-viscosity substances, while failing to achieve targeted and narrow focusing of the mixture.
Innovation Solution
A spray head design featuring two component channels with outlets arranged side by side at the tip, surrounded by an annular channel with subdivided compressed gas outlets, allowing for precise control of gas flow and distribution to ensure uniform mixing and atomization with minimal gas usage, while preventing premature mixing and sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If components are mixed in a mixing channel within the device, then mixing occurs, but sticking or contamination can occur inside the spray device
Solution Approach 1:
The patent removes the mixing function from the internal mixing channel and extracts it to occur externally after components exit the spray head. The components are discharged separately and mixed by the gas stream outside the device, eliminating the mixing channel that causes sticking and contamination.
Solution Approach 2:
The compressed gas stream serves as an intermediary that performs the mixing function externally. Instead of components mixing within the device, the gas stream transports and mixes them after discharge, preventing contact between components inside the spray head while achieving uniform mixing.
2Manufacturing precision
If a gas stream is directed at components for atomization, then droplet formation occurs, but uniform mixing and fine droplet size are difficult to achieve
Solution Approach 1:
The patent applies preliminary action by pre-mixing the components with the compressed gas stream before the atomization process. The components are introduced into the gas stream where they are thoroughly mixed and pre-atomized, ensuring uniform distribution before reaching the treatment area.
Solution Approach 2:
The patent uses pneumatic principles by utilizing a compressed gas stream as the primary medium for both mixing and atomization. The gas stream carries the components, mixes them uniformly, and creates fine droplets through pneumatic forces, achieving both mixing uniformity and droplet size control.
3Quantity of substance
If high-viscosity components are sprayed, then substance delivery occurs, but excessive compressed gas is required
Solution Approach 1:
The patent applies parameter changes by optimizing the interaction between the compressed gas stream and high-viscosity components. By controlling the gas velocity, pressure, and mixing conditions, the system achieves effective atomization and delivery of viscous substances with reduced gas consumption compared to conventional methods.
4Area of stationary object
If components are discharged in a ring shape over a large area, then coverage is improved, but complete detection by compressed gas is hardly guaranteed
Solution Approach 1:
The patent merges the component discharge paths into a concentrated stream rather than a dispersed ring pattern. The components are delivered through closely spaced outlets that create a focused flow, ensuring complete interaction with the compressed gas stream and reliable mixing while maintaining effective coverage.
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 enables uniform mixing and fine droplet formation, reduces compressed gas requirements, and ensures targeted application of high-viscosity substances with reduced risk of sticking or contamination, achieving efficient and precise spraying.
Implementation Method 1
The gas flow transports the mixed components to a treatment site
Implementation Method 2
The components are discharged from the spray head and atomized into individual droplets by a gas stream directed at the components at the same time
Data Source
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AI summary
A spraying device having a spray head for spraying at least one component comprises at least one substance component duct (6, 6'; 20), the component outlet (8, 8'; 23, 23') of which leads out of a spray head tip (7). An annular duct (12) for a pressurized gas surrounds the at least one component duct (6, 6'; 20) at least partially in the longitudinal direction and leads out of the spray head (5) at the spray head tip (7). A pressurized gas supply duct (13) is provided for introducing pressurized gas at the annular duct (12). The annular duct (12) has a plurality of ribs (16, 16'), which divide the annular duct (12) at least in the region of the spray head tip (7) into pressurized gas outlet ducts (17, 17') that are separated from each other.