Fan Flow Guiding Member Induces Airflow via Differential Pressure
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Solution Overview
Problem
Existing fans in electronic devices have poor heat dissipation capabilities, which can lead to overheating and potential damage to electronic components such as processors if heat is not dissipated timely.
Innovation Solution
A fan design that includes a body with an air duct, blades, and a flow guiding member featuring multiple channels and sleeves to increase airflow rate and induce additional airflow through differential pressure, resulting in a higher total air output and improved heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fan structure is used, then the device complexity is low, but the heat dissipation capability is poor
Solution Approach 1:
The air outlet area is segmented into multiple channels (first channel, second channel, third channel) that are sequentially disposed in the thickness direction. This segmentation allows the main airflow to be divided into multiple streams, increasing the total air output and heat dissipation capability while maintaining a manageable structural complexity through systematic organization of the channels and guide plates.
Solution Approach 2:
The flow guiding member utilizes the thickness direction (Z-axis) to arrange multiple channels and guide plates in a layered configuration. By transitioning from a two-dimensional planar structure to a three-dimensional stacked structure, the patent increases airflow capacity without significantly increasing the fan's footprint area, effectively resolving the contradiction between heat dissipation capability and structural complexity.
2Reliability
If airflow rate is increased to improve heat dissipation, then energy consumption increases, but heat dissipation effectiveness is improved
Solution Approach 1:
The flow guiding member acts as an intermediary that optimizes airflow distribution through multiple channels and guide plates. By systematically guiding the air flow through a structured path with multiple streams, the system achieves higher total air output with reduced turbulence and energy loss, thereby improving heat dissipation effectiveness without proportionally increasing energy consumption.
Solution Approach 2:
The patent changes the airflow parameters by dividing the main airflow into multiple streams through sequentially disposed channels. This parameter change increases the total air output and improves heat dissipation effectiveness. The structured multi-channel design optimizes flow distribution to reduce energy loss from turbulence, addressing the energy consumption concern.
3Productivity
If multiple channels are introduced to increase airflow, then manufacturing complexity increases, but heat dissipation performance is improved
Solution Approach 1:
The air duct is segmented into multiple channels (first, second, and third channels) that are sequentially disposed in the thickness direction. This segmentation increases the airflow rate by creating multiple flow paths. The channels are manufactured as integrated components with the end cover, bottom cover, and guide plates, which systematicalizes the complexity and facilitates production through standardized assembly processes.
Solution Approach 2:
Multiple functional elements (end cover, bottom cover, peripheral plate, first guide plate, second guide plate) are merged to form an integrated air duct structure with multiple channels. This merging approach consolidates what would otherwise be separate complex components into a unified structure that can be manufactured and assembled more efficiently, reducing overall manufacturing complexity while maintaining high airflow capability.
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 fan design significantly increases air output and heat dissipation efficiency by dividing main airflow into multiple streams, creating differential pressure to induce additional airflow, and using a streamlined structure to reduce turbulence and enhance airflow uniformity at the air outlet.
Implementation Method 1
creating differential pressure to induce additional airflow
Implementation Method 2
induce additional airflow through differential pressure, resulting in a higher total air output
Implementation Method 3
using a streamlined structure to reduce turbulence and enhance airflow uniformity at the air outlet
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
This application provides a fan and an electronic device. The fan includes a body, and an air duct, an air outlet and a flow guiding inlet are formed in the body; the air duct includes an air inlet area and an air outlet area, and a flow guiding member is disposed in the air outlet area; the flow guiding member includes a first guide plate, a second guide plate, and a sleeve; the flow guiding member and the body form a first channel, a second channel, and a third channel; the sleeve includes a flow guiding cavity; one side of the second channel is isolated from the air inlet area, a flow guiding outlet is formed on the other side of the second channel, and the flow guiding outlet and the air outlet face the same direction and are communicated; the air inlet area, the first channel, and the air outlet are sequentially communicated, and the air inlet area, the third channel, and the air outlet are sequentially communicated; and the flow guiding inlet, the flow guiding cavity, and the second channel are sequentially communicated. After a main airflow in the air inlet area enters the first channel and the third channel, a negative pressure area is formed at the flow guiding outlet, a differential pressure exists between air pressures in the negative pressure area and the second channel, and the differential pressure enables air to enter the flow guiding cavity from the flow guiding inlet to form an induced airflow, thereby increasing an air output.