Serial Fan Assembly with Asymmetric Size Connection Structure
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Solution Overview
Problem
Conventional serial fan assemblies with fans of the same size connected in series suffer from reduced air flow efficiency due to skewed air flow directions, leading to decreased air pressure and volume, which hampers effective heat dissipation in high-performance electronic products.
Innovation Solution
A serial fan assembly with fans of different sizes connected through a structured connection that guides and compresses air flow, utilizing an upstream fan with a larger size and a downstream fan with a smaller size, or an upstream, middle-stream, and downstream fan configuration, where each fan's size differs, to enhance air pressure and volume by de-skewing and compressing the air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fans of the same size are connected in series with static blades at outlets, then the structure is simple and easy to manufacture, but the air flow direction becomes skewed and air output efficiency is reduced
Solution Approach 1:
The patent applies asymmetry by using fans of different sizes in the serial connection (upstream fan larger than downstream fan). This asymmetric configuration compensates for the skewed air flow direction caused by static blades, allowing the air flow to enter the downstream fan more perpendicularly and maintain higher air output efficiency while keeping the structure relatively simple
2Reliability
If multiple fans are connected in series to enhance air volume and prevent single fan failure, then reliability and air volume are improved, but air pressure is reduced due to skewed flow directions
Solution Approach 1:
The patent changes the size parameter of the fans in the serial connection. By making the upstream fan larger than the downstream fan, the system maintains both reliability (multiple fans in series) and adequate air pressure. The size parameter adjustment compensates for the flow skewing effect, allowing the air flow to maintain better direction and pressure through the connection structure
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 effectively increases air pressure and volume, enhancing the overall heat dissipating efficiency of the fan assembly, as demonstrated by increased air pressure and volume measurements compared to conventional assemblies at 6000 rpm.
Implementation Method 1
When the movable blades 101 and 111 of the fans 10 and 11 rotate, an air flow is generated from the first fan 10 to the second fan 11
Data Source
AI summary
A connection structure is applied to a serial fan assembly, which includes an upstream fan and a downstream fan. The upstream fan and the downstream fan have different sizes. The connection structure connects the upstream fan and the downstream fan so that the upstream fan and the downstream fan are arranged in series. The connection structure has a housing, a base and a plurality of ribs for connecting the base, and the housing is formed with an air guiding passage and a chamber. The upstream fan or the downstream fan is accommodated in the chamber or the air guiding passage is located between the upstream fan and the downstream fan.