Mist Blower Diffusion Cover Segmented Fins
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Solution Overview
Problem
Conventional mist blowers with integrated diffusion covers face challenges in widely spraying chemical liquids without increasing air flow resistance, as tilting fins to enhance diffusion reduces the aperture ratio, and the covers are not easily detachable.
Innovation Solution
A mist blower design featuring a diffusion cover with flow directing and diffusion fins that tilt at different angles to radially disperse air and chemical liquid, along with a locking mechanism for easy attachment and detachment, allowing for wider dispersion without reducing the aperture ratio and increasing air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If each fin is tilted radially outward to the blast pipe to widely spray chemical liquid, then the spraying width is improved, but the aperture ratio of the diffusion cover decreases and flow resistance increases
Solution Approach 1:
The diffusion cover is segmented into two distinct types of fins: flow directing fins and diffusion fins. This segmentation allows each type to perform its specific function - flow directing fins manage the main air flow with minimal resistance, while diffusion fins create radial diffusion of chemical liquid without significantly blocking the aperture.
Solution Approach 2:
Different regions of the diffusion cover have different fin configurations. The flow directing fins are positioned to handle the primary air flow path, while diffusion fins are strategically placed to create radial outward flow. This local differentiation optimizes both aperture ratio and spraying width in different areas of the diffusion cover.
2Reliability
If the diffusion cover is integrally formed with the blast pipe to maintain structural stability, then the reliability is improved, but the ease of operation for replacing or removing the diffusion cover deteriorates
Solution Approach 1:
The diffusion cover is designed as a separable component rather than being integrally formed with the blast pipe. It can be attached to and detached from the blast pipe, allowing for easy replacement and maintenance while maintaining structural stability when assembled.
Solution Approach 2:
The diffusion cover transitions from a static integral structure to a dynamic separable structure. This allows the system to adapt between states of assembled stability and disassembled accessibility, improving ease of operation for replacement and removal while maintaining reliability during operation.
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
Enables efficient, wide-area spraying of chemical liquids without increasing air flow, reduces apparatus weight, and simplifies the process of attaching and removing the diffusion cover, improving operational efficiency.
Implementation Method 1
a diffusion fin configured to tilt radially outward with a greater angle than of the directing fins and to radially outwardly guide part of the air containing the chemical liquid
Data Source
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AI summary
A mist blower (10) for spraying chemical liquid includes a blast pipe (60) configured to allow air supplied from a fan (50) to flow through and to be discharged from an front end of the blast pipe (60), the chemical liquid being sprayed by mixing the chemical liquid into the air flowing through the blast pipe (60); and a diffusion cover (80) provided in the front end of the blast pipe (60) to radially outwardly diffuse the air containing the chemical liquid which is being discharged from the blast pipe (60). The diffusion cover (80) includes: a flow directing fin (81) configured to direct flow of the air containing the chemical liquid which is being discharged from the blast pipe (60); and a diffusion fin (82) configured to tilt radially outward with a greater angle than of the directing fins (81) and to radially outwardly guide part of the air containing the chemical liquid.