Fan Assembly Cooling Motor via Stator Gap Airflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional fan assemblies for high-end electronic devices face challenges in effectively cooling the motor components due to limited airflow into the motor casing, leading to heat accumulation and potential damage from increased drive current.
Innovation Solution
A fan assembly design featuring a cup-shaped portion and a base portion with strategically cut openings in the base portion's wall to guide and increase airflow into the space defined by the cup-shaped and base portions, enhancing airflow and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the motor rotates rotor vanes at high speed to discharge more heat, then heat discharge performance is improved, but drive current increases causing heat generation in motor coils that may damage electronic parts
Solution Approach 1:
The patent extracts the harmful heat from the motor casing by introducing air flow through the gap between rotor unit and stator unit. The air flow directly contacts the coils and circuit board, carrying heat away from these components. This separates the heat removal function from the general air flow path, targeting specifically the heat-generating electronic parts within the motor casing.
Solution Approach 2:
The air flow acts as an intermediary medium between the heat-generating coils and the external environment. By introducing air through the gap, the patent creates a heat transfer pathway where air absorbs heat from the coils and circuit board, then transports it outward. This intermediary mechanism enables efficient heat removal without direct thermal contact between components.
2Temperature
If air flow is increased to discharge heat accumulated in the motor casing, then heat dissipation is improved, but the conventional design does not actively take air flow into the motor casing limiting cooling efficiency
Solution Approach 1:
The patent performs preliminary action by proactively introducing air flow into the motor casing through the gap between rotor unit and stator unit before heat accumulation becomes critical. The air flow path is pre-established through strategic positioning of the gap and stator vanes, ensuring that cooling air reaches the heat-generating components promptly. This preliminary cooling action prevents heat buildup rather than reacting to it.
Solution Approach 2:
The patent segments the air flow path into distinct zones: an external air intake region, a gap region where air enters the motor casing, and an internal cooling region where air contacts the coils and circuit board. This segmentation allows optimized design of each zone, with the gap specifically configured to facilitate efficient air entry and distribution to heat-generating components.
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 design effectively increases airflow into the motor casing, improving cooling efficiency and reducing heat accumulation, thereby protecting electronic components from damage.
Implementation Method 1
When the rotor vanes rotate, negative pressure is generated at a gap defined between a stator unit and the rotor unit. Due to the negative pressure, a part of air flow generated by rotation of the rotor vanes is taken into the motor casing through the gap
Implementation Method 2
a magnet and an armature, arranged in a space defined by the cup-shaped portion and the base portion of the housing, for generating a torque rotating the cup-shaped portion
Data Source
AI summary
A fan assembly includes a plurality of rotor vanes, a motor rotating the rotor vanes with a center axis J1 as center, a plurality of stator vanes arranged in a passage of air flow generated by rotation of the rotor vanes, and a base portion including a plate-like portion and side circumferential wall. A radially inner end of the stator vane is connected to the side circumferential wall of the base portion, and a side opening is arranged in the side circumferential wall. The air flow generated by rotation of the rotor is guided along the stator vane and taken into the motor to cool of the heat generating source arranged therein.