Spray Gun Structured Surface Air Resistance Reduction
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Solution Overview
Problem
Existing spray guns for viscous media face limitations in increasing atomizer performance without significant construction complexity and increased power consumption, as they rely on high pumping pressure to reduce friction resistance.
Innovation Solution
The surfaces of the air guidance duct and atomizer nozzle are modified with structured surfaces, featuring indentations and protrusions to reduce air resistance, allowing for increased air speed and pumping rate without additional energy input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If smooth surfaces are used in air guidance duct and atomizer nozzle, then friction resistance is reduced, but air speed and pumping rate cannot be increased without additional energy consumption
Solution Approach 1:
The patent applies a structured surface with micro-indentations and protrusions (porous-like structure) on the air guidance duct and atomizer nozzle surfaces. This structured surface reduces friction resistance and enables increased air speed without additional energy consumption, resolving the contradiction between speed improvement and energy consumption.
Solution Approach 2:
The patent changes the surface parameters by introducing structured surfaces with specific indentation depths (0.1-10mm) and protrusion heights (0.01-1mm) instead of smooth surfaces. This parameter change reduces friction resistance and allows air speed increase without proportionally increasing energy consumption.
2Productivity
If pumping pressure is increased to improve atomizer performance, then transport quantity increases, but construction complexity and power consumption increase
Solution Approach 1:
The structured surface with micro-indentations creates a porous-like effect that reduces friction resistance in the air flow path. This allows the existing pump system to achieve higher transport quantities without increasing pumping pressure, thereby avoiding increased construction complexity and power consumption.
Solution Approach 2:
The patent introduces a new dimension - surface texture - to solve the productivity problem. Instead of increasing pressure (one-dimensional solution), the structured surface modifies the flow characteristics through micro-geometry, achieving higher transport quantities without additional energy input or system complexity.
3Productivity
If pumping pressure is increased to improve atomizer performance, then transport quantity increases, but power consumption increases
Solution Approach 1:
The structured surface acts like a porous structure that reduces friction resistance to air flow. This enables the pump to move more air (higher transport quantity) without increasing power consumption, as the structured surface facilitates smoother flow with less energy loss to friction.
Solution Approach 2:
By changing the surface parameters (introducing indentations and protrusions), the patent reduces the energy required for air propulsion. The structured surface modifies flow dynamics to reduce friction, allowing higher transport quantities at the same power consumption level.
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 approach enables a significant increase in transport quantity by up to 30% without additional energy consumption or construction complexity, enhancing efficiency and economy.
Implementation Method 1
the surfaces of the air guidance duct and/or atomizer nozzle, and/or an air cap, which come into contact with the stream of compressed air, or are wetted, are provided wholly or in part, with a structured surface in the form of indentations and/or protrusions worked into the surfaces
Implementation Method 2
the friction resistance is kept low
Data Source
AI summary
A spray gun for spraying paints and similar viscous media that can be propelled pneumatically, comprising a gun housing for accommodating components of the spray gun that effect propulsion, mixture and/or metering, a handle projecting from the gun housing, and a reservoir tank removably attached to the gun housing for holding the medium to be processed, with the housing of the spray gun provided with an air guidance duct through which the compressed air responsible for atomization flows to an atomizer nozzle, wherein surfaces of the air guidance duct and/or atomizer nozzle, and/or an air cap, which come into contact with the stream of compressed air, or are wetted, are provided wholly or in part with a structured surface in the form of indentations and/or protrusions worked into the surfaces.