Self-Driven Fan Blade Using Airflow Pressure for Heat Dissipation
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Solution Overview
Problem
Conventional fans require multiple motors to dissipate heat from various heat sources, leading to increased noise and cost.
Innovation Solution
A fan system that uses a main airflow to rotate without a motor, utilizing a duct with feeding ports and blades with passive and active parts, where the pressure difference created by the airflow drives the rotation of the blades to dissipate heat, reducing the need for motors and associated costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple motors are used to dissipate heat from various heat sources, then heat dissipation effectiveness is improved, but noise and cost are increased
Solution Approach 1:
The fan blade is divided into a passive part and an active part, where the passive part interacts with the main airflow to generate rotation, while the active part extends outward to push ambient air. This segmentation allows the fan to function without a motor, eliminating motor noise while maintaining heat dissipation effectiveness through the pressure difference created by the airflow.
Solution Approach 2:
The fan blade utilizes the main airflow itself to generate the rotational force needed for operation. The pressure difference between the first and second airflows created by the passive part automatically drives the rotation of the active part, eliminating the need for external motor power and associated noise.
2Temperature
If multiple motors are used to dissipate heat from various heat sources, then heat dissipation effectiveness is improved, but cost is increased
Solution Approach 1:
The fan blade uses the main airflow to generate rotational force, eliminating the need for motors. This self-driven mechanism reduces component count and manufacturing cost while maintaining effective heat dissipation through the pressure difference-driven rotation of the active part.
Solution Approach 2:
The motor component is completely removed from the system. Instead of using a motor to drive the fan, the design extracts the driving force from the main airflow itself, creating a simpler, cheaper structure that relies on the pressure difference between airflows to rotate the blade.
3Speed
If a motor is used to rotate the fan blade, then rotation control is improved, but power consumption is increased
Solution Approach 1:
The fan blade is designed to rotate automatically using the main airflow as its power source. The pressure difference between the first airflow (from the feeding port) and the second airflow (pushed by the active part) creates the rotational force, eliminating the need for motor power and reducing energy consumption.
Solution Approach 2:
The system uses pneumatic pressure differences to drive the fan rotation. The main airflow creates a pressure difference across the passive part of the blade, which translates into rotational force on the active part, replacing mechanical motor drive with fluid-pressure-based motion.
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 solution decreases power consumption and costs while effectively dissipating heat from electronic devices without the noise and vibration associated with multiple motors.
Implementation Method 1
The main airflow from the first feeding port is divided into a first airflow and a second airflow by the passive part, so that a pressure difference formed between the first and second airflows drives the passive part to rotate about the shaft
Implementation Method 2
The pressure at the outlet is smaller than that at the inlet when the active part rotates about the shaft, to impel the main airflow
Data Source
AI summary
A fan system includes a first airflow generator providing a main airflow, a duct having a first feeding port to guide the main airflow, and a first fan. The first fan includes a base, a rotor connected to the base by a shaft, and a plurality of blades connected to the rotor. Each blade includes a passive part corresponding to the first feeding port and an active part. The main airflow drives the passive part rotating about the shaft to synchronously rotate the active part, dissipating heat from a heat source, increasing flow rate of airflow and decreasing pressure. The amount and location of the fans can be flexibly configured.