Blower Air Guide for Uniform Discharge Flow
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Solution Overview
Problem
Conventional blowers with multiple vane guides suffer from increased internal flow resistance, deteriorated discharge performance, and complex manufacturing and installation processes due to non-uniform air distribution and direction issues.
Innovation Solution
A blower design featuring a single air guide with a specific shape and orientation that divides the internal flow path, allowing half of the air to be directed to each half of the elongated discharge port, ensuring uniform distribution and minimizing pressure loss, along with a bar link system for simplified installation and flexibility in flow path adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple vane guides are installed to evenly distribute air flow, then air distribution uniformity is improved, but internal flow resistance increases and discharge performance deteriorates
Solution Approach 1:
The air guide is divided into multiple segments along the flow path, with each segment having a progressively larger cross-sectional area. This segmentation allows gradual expansion of the air flow, reducing turbulence and pressure loss while achieving uniform distribution across the discharge port.
Solution Approach 2:
Different sections of the air guide have different cross-sectional areas optimized for their specific function: the lower section has a smaller area to maintain flow velocity, while the upper section has a larger area to distribute air uniformly. This local variation in geometry optimizes both flow resistance and distribution uniformity.
2Manufacturing precision
If multiple vane guides are manufactured and installed, then air distribution is improved, but manufacturability decreases and installation process becomes complicated
Solution Approach 1:
Multiple air guide segments are integrated into a single monolithic structure that can be manufactured as one piece using injection molding or similar processes. This merging eliminates the need for separate manufacturing and assembly of multiple components, simplifying both production and installation while maintaining the functional benefits of segmented flow distribution.
3Ease of manufacture
If a single air guide is used to simplify manufacturing, then manufacturability is improved, but air distribution uniformity may be compromised
Solution Approach 1:
The single air guide incorporates locally varied cross-sectional areas along its length, with the lower portion having a smaller area and the upper portion having a larger area. This local geometric variation within a single component achieves uniform air distribution across the discharge port while maintaining manufacturing simplicity.
Solution Approach 2:
The air guide utilizes the vertical dimension by varying its cross-sectional area from bottom to top, creating a three-dimensional flow distribution structure. This dimensional approach allows a single component to perform the function of multiple segmented guides by progressively expanding the flow area along the vertical axis.
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 achieves improved air distribution, reduced pressure loss, enhanced manufacturability, and easier installation, while maintaining effective discharge performance and flexibility in responding to changing flow conditions.
Implementation Method 1
a blower for discharging air through the Coanda effect
Data Source
AI summary
A blower of the present disclosure includes: a lower case having a suction port; an upper case which has a pair of towers that are spaced apart from each other and form a space through which a discharge air flows therebetween; and a blower fan which is disposed inside the lower case and discharges air to the upper case, wherein each of the pair of towers has a discharge port that is elongated in an up-down direction and disposed closer to a rear end of the tower than a front end, and has an air guide, which is disposed therein, that guides the air discharged by the blower fan to the discharge port, wherein the air guide is convex upward, has one end disposed near a middle between the front end and the rear end of the tower, and has the other end disposed near a middle of a vertical height of the discharge port, wherein the other end is disposed higher than the one end, so that the direction of air flow discharged from the fan can be smoothly switched to the discharge port side by only a single air guide, thereby minimizing the flow resistance inside the blower and greatly improving the economic efficiency and manufacturability of the blower.