Mixed Flow Fan Heat Dissipation via Sunken Static Blades
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Solution Overview
Problem
Current mixed flow fans face challenges in heat dissipation efficiency and noise reduction due to their geometric shape, which limits motor material choices and leads to overheating and reduced performance.
Innovation Solution
The design incorporates sunken static blades, a curved hub with unequal slopes, and guiding plates to increase blade density and airflow efficiency, along with a motor structure featuring a stator and rotor with magnetic elements for enhanced heat dissipation and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional fan design is used for mixed flow fan, then geometric shape is simple, but fan characteristics cannot be improved and heat dissipation efficiency is reduced
Solution Approach 1:
The fan is divided into two distinct blade systems: rotating blades attached to the impeller and stationary blades attached to the frame housing. This segmentation allows each blade type to perform specific functions - rotating blades for initial air movement and stationary blades for additional air guidance and heat dissipation, thereby improving overall heat dissipation efficiency without excessive complexity
Solution Approach 2:
The stationary blades extend in the axial direction from the frame housing toward the rotating blades, adding a dimensional element to the traditional radial blade design. This axial extension creates a more complex three-dimensional airflow path that enhances heat dissipation capability while maintaining manageable geometric complexity
2Power
If silicon steel sheets are selected for high-power heat dissipation, then power handling is improved, but waste heat accumulates and causes overheating
Solution Approach 1:
The patent converts the harmful effect of waste heat generation into a beneficial cooling mechanism. The motor is designed with heat-generating components (stator and rotor) that also serve as heat dissipation pathways. The stationary blades are positioned to guide airflow over these hot components, transforming the heat problem into a useful cooling function that maintains power handling while controlling temperature
Solution Approach 2:
The motor structure serves dual functions: generating rotational power to drive the impeller and simultaneously acting as a heat dissipation device. The stator structure with its windings and the rotor structure with magnetic elements are designed to facilitate airflow and heat transfer, allowing the same components to perform both mechanical and thermal functions
3Productivity
If static blades are made longer to improve fan characteristics, then blade density increases, but blades protrude from outlet and cause interference
Solution Approach 1:
The stationary blades are designed with non-uniform dimensions - they have a first dimension (axial length) that allows them to extend toward the rotating blades for improved airflow control, and a second dimension (radial position) that ensures they do not protrude beyond the frame housing outlet. This localized optimization of blade geometry achieves enhanced fan characteristics while avoiding outlet interference
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 configuration enhances fan characteristics, increases self-heat dissipation efficiency, reduces noise, and extends the fan's lifetime while maintaining operation performance.
Implementation Method 1
The motor comprises a stator structure and a rotor structure. The rotor structure comprises a shaft, a magnetic shell and a magnetic element. One end of the shaft is connected with the magnetic shell, and the magnetic element is disposed around an inner periphery of the magnetic shell and located corresponding to the stator structure.
Implementation Method 2
The frame comprises a base, a frame housing and a plurality of static blades. The static blades are disposed around an outer periphery of the base and connect between the base and the frame housing. The impeller comprises a hub and a plurality of rotor blades.
Data Source
AI summary
A fan includes a frame, an impeller and a motor. The frame includes a base, a frame housing and a plurality of static blades. The frame housing includes an outlet. The static blades are disposed around the outer periphery of the base and connect between the base and the frame housing. A distance is provided between the outlet and the ends of the static blades located adjacent to the outlet, and the static blades are not protruding from the outlet. The impeller includes a hub and a plurality of rotor blades. The hub has a curved surface. The slopes of the straight lines connecting any two points on the curved surface are not equal. The rotor blades are disposed around the outer periphery of the hub. The motor is disposed on the base, and connects with and drives the impeller to rotate.