Blower Fan Support Rod for Thin Chassis Cooling
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Solution Overview
Problem
In information handling systems, the reduction in thickness of the base chassis to enhance portability leads to a decrease in the size of the blower fan system, resulting in reduced cooling capabilities due to a larger air gap between the fan blades and the D-cover, which can cause damage from deflection and limits airflow.
Innovation Solution
Incorporating a fan support rod that passes through the cylindrical main shaft and bearing, structurally supporting the blower fan system and reducing the air gap, allowing for increased fan blade height and improved airflow while preventing the D-cover from deflecting into the fan blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the base chassis thickness is reduced to enhance portability, then the compact form factor is improved, but the blower fan system size is reduced resulting in decreased cooling capabilities
Solution Approach 1:
The fan blade height is increased in the vertical dimension while the base chassis thickness is reduced in the horizontal dimension. The support rod extends vertically to provide structural support, enabling the fan blades to achieve greater height without increasing the overall base chassis footprint, thus maintaining compact form factor while improving cooling capability.
Solution Approach 2:
The blower fan system is segmented into distinct functional components: the support rod structure, the fan blade assembly, and the housing. This segmentation allows the fan blade height to be optimized independently from the base chassis thickness, enabling improved cooling performance within a compact form factor.
2Volume of moving object
If the base chassis thickness is reduced, then the compact form factor is improved, but the air gap between fan blades and D-cover increases causing damage from deflection
Solution Approach 1:
A support rod is introduced as an intermediary structural element between the fan blade assembly and the housing. This support rod prevents the D-cover from deflecting into the fan blades by providing rigid structural support, thereby eliminating the harmful deflection effect while allowing reduced base chassis thickness.
Solution Approach 2:
The support rod is constructed from high-strength materials that provide sufficient structural support to prevent deflection damage. This allows the use of thinner base chassis materials while maintaining the structural integrity needed to prevent harmful deflection effects.
3Volume of moving object
If the base chassis thickness is reduced, then the compact form factor is improved, but the airflow is limited reducing cooling performance
Solution Approach 1:
The fan blade height is increased in the vertical dimension to improve airflow generation, while the base chassis thickness is reduced in the horizontal dimension. The support rod enables this vertical expansion without compromising structural support, allowing enhanced cooling performance within a compact form factor.
Data Source
AI summary
An information handling system includes: a processor, a memory, and a power source; and a blower fan system including: a cylindrical bearing including a cylindrical hollow receiving portion extending from a top of the cylindrical bearing to the bottom of the cylindrical bearing; a cylindrical main shaft rotatably coupled in the cylindrical hollow receiving portion of the cylindrical bearing including a shaft pass-through hollow portion extending from a top of the cylindrical main shaft to the bottom of the cylindrical main shaft to form a pass-through hole; a set of fan blades mechanically coupled to the cylindrical main shaft having a set of magnets; an electromagnet to drive rotation of the set of fan blades; and a fan support rod passing through the cylindrical bearing and cylindrical main shaft at the shaft pass-through hollow portion and mechanically supporting the fan within a base chassis.