Ring-type Fan Impeller Backflow Control
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Solution Overview
Problem
Conventional ring-type fans experience reduced heat dissipation efficiency and performance due to negative pressure at the air outlet caused by backflows of air, which interfere with airflow and shorten the fan's service life.
Innovation Solution
The impeller structure features a stop section on the ring member and pressure relief sections on the frame, guiding backflows away from the air inlet to prevent interference with incoming air, thereby minimizing negative pressure and enhancing heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If air flows out of the frame via the air outlet, then heat dissipation function is achieved, but negative pressure is produced causing backflows that interfere with inflow and lower heat dissipation efficiency
Solution Approach 1:
The invention divides the air outlet structure into multiple segments by providing multiple air outlet holes instead of a single outlet. This segmentation distributes the outflow, reducing the intensity of negative pressure and backflows at each individual outlet, thereby minimizing interference with inflow air and improving overall heat dissipation efficiency
Solution Approach 2:
The invention introduces an air outlet cover as an intermediary component between the receiving space and the external environment. This cover with multiple outlet holes acts as a mediator that controls and distributes the outflow, reducing direct backflow impact on the inflow path while maintaining effective heat dissipation function
2Ease of operation
If clearance is formed between ring member and frame inner wall, then impeller assembly can be mounted, but backflows pass through clearance and cause unsmooth outflow and reduced service life
Solution Approach 1:
The invention applies local quality improvement by adding a sealing structure specifically at the clearance region between the ring member and frame inner wall. This localized sealing treatment maintains the necessary clearance for impeller mounting while preventing backflows from passing through the clearance, thus ensuring smooth outflow and extending service life
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 design increases heat dissipation efficiency and performance by ensuring smooth airflow and effective heat removal from electronic components, prolonging the fan's service life.
Implementation Method 1
Any backflow of the air flowed through the impeller structure would be stopped by the stop section from interfering with the inflow of air
Implementation Method 2
The pressure relief section is provided on and sidewardly extends through the frame to define an airflow guide thereat to communicate with the receiving space and the air passage
Implementation Method 3
The impeller assembly is rotatably mounted in the receiving space and connected to the shaft seat. When the ring-type fan operates, external air flows into the receiving space via the air inlet and flows out of the frame via the air outlet
Implementation Method 4
the ring-type fan can have upgraded heat dissipation performance... helps in removing heat from surrounding electronic elements
Data Source
AI summary
A ring-type fan includes a frame having a receiving space defined between an air inlet and an air outlet thereof and being provided along an inner side of the air outlet with an inward projected wall portion; an impeller assembly rotatably mounted in the receiving space and including spaced impellers outward extended from a hub, and a ring member connected to radially outer ends of the impellers and externally provided with a circle of stop section, which and the projected wall portion together define an air passage between them; and at least one pressure relief section defining an airflow guide on the frame to communicate with the receiving space and the air passage. Any backflow can be guided out of the frame via the air passage and the pressure relief section without interfering with the inflow of air, allowing the ring-type fan to have upgraded heat dissipation performance.