Cooling Fan Circuit Layout to Reduce Dust on Electronic Parts
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Solution Overview
Problem
Atmospheric components and dust introduced through air intake ports can attach to electronic parts on the circuit substrate of cooling fans in electronic devices, such as game machines and servers, due to the relative positional relation between the air intake port and the cooling fan.
Innovation Solution
The cooling fan is arranged with its air intake port positioned away from the motor in a radial direction, and the electronic parts are positioned on the opposite side of the air intake port with a plane interposed therebetween, passing through the axis line of the motor, to reduce dust and atmospheric components from adhering to the circuit substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air intake port is positioned close to the motor for efficient air intake, then the cooling performance is improved, but atmospheric components and dust attach to the electronic parts on the circuit substrate
Solution Approach 1:
The patent positions the air intake port in a radial direction away from the motor, utilizing the radial dimension of the cooling fan structure. This spatial arrangement in the radial dimension allows efficient air intake while creating a physical separation zone that prevents dust and atmospheric components from reaching the electronic parts on the circuit substrate, thus resolving the contradiction between cooling performance and contamination prevention
2Device complexity
If the electronic parts are arranged close to the air intake port for compact design, then the device complexity is reduced, but atmospheric components and dust attach to the electronic parts
Solution Approach 1:
The patent introduces a plane passing through the axis line of the motor as an intermediary spatial boundary. This plane acts as a virtual barrier that separates the air intake port from the electronic parts, allowing the parts to be arranged in a compact configuration while preventing direct exposure to dust and atmospheric components. The plane serves as a mediating structure that maintains both compactness and protection
Data Source
AI summary
There is provided an electronic device that prevents atmospheric components and dust from sticking to parts mounted on a circuit substrate of a cooling fan. The cooling fan has the circuit substrate arranged, with respect to a motor, in a direction along an axis line of the motor. At least one of a switching element, a control IC for controlling the switching element, a protection diode, a protection capacitor, and a shunt resistor is mounted on the circuit substrate. An air intake port of the electronic device is positioned away from the motor in a radial direction of the motor. The at least one of the parts is arranged on the opposite side of the air intake port with a plane interposed therebetween, the plane passing through the axis line of the motor.