3D Twisted Impeller Wheel for High-Pressure Mixed-Flow Cooling
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Solution Overview
Problem
Conventional fan blades in centrifugal fans are insufficient for high heat dissipation requirements in network communication devices like data centers, necessitating the use of both axial-flow and centrifugal fans to enhance heat removal efficiency.
Innovation Solution
An impeller wheel design featuring a top ring, bottom disc, and fan blades with a three-dimensional twist, combining the advantages of centrifugal and axial-flow fans to increase wind pressure and heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If conventional centrifugal fans are used to provide high wind pressure for heat dissipation, then wind pressure is improved, but device complexity increases due to the need for additional axial-flow fans
Solution Approach 1:
The patent combines the functions of centrifugal fans and axial-flow fans into a single impeller wheel. The fan blades are configured with a mixed-flow design where air enters axially and exits radially, integrating both axial-flow and centrifugal-flow characteristics into one component, thereby achieving high wind pressure without requiring multiple separate fans
Solution Approach 2:
The impeller wheel is designed to perform multiple functions simultaneously: it provides axial-flow characteristics for efficient air intake and centrifugal-flow characteristics for high wind pressure output. This multi-functional design allows a single component to replace what would traditionally require multiple specialized components
2Productivity
If multiple axial-flow fans are used to meet heat dissipation requirements, then heat dissipation efficiency is improved, but wind pressure remains insufficient
Solution Approach 1:
The patent merges axial-flow and centrifugal-flow fan designs into a single mixed-flow impeller. The blade geometry is specifically designed to guide air axially at the inlet and redirect it radially at the outlet, combining the high flow efficiency of axial fans with the high pressure capability of centrifugal fans in one component
3Ease of manufacture
If conventional vertically arranged fan blades are used, then manufacturing is simple, but heat dissipation efficiency is insufficient for high-density electronic devices
Solution Approach 1:
The fan blades feature a three-dimensional curved geometry rather than simple vertical arrangements. The blades are designed with specific curvature profiles and twist angles to optimize airflow patterns, creating a mixed-flow path that enhances heat dissipation efficiency while remaining manufacturable through standard forming processes
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 impeller wheel achieves improved heat dissipation efficiency and wind pressure through a mixed-flow design, enhancing performance and reducing noise.
Implementation Method 1
A centrifugal fan operates by discharging air from a lateral air outlet after the air enters from an axial direction of the impeller
Implementation Method 2
The top ring has a curved structure between the inner edge and the outer edge of the top ring. The bottom disc has a curved structure between the inner edge and the outer edge of the bottom disc
Data Source
AI summary
An impeller wheel includes a top ring, a bottom disc, and a plurality of fan blades. The inner edge of the top ring surrounds an air inlet. The top ring has a curved structure. The inner edge of the bottom disc surrounds an opening. The bottom disc has a curved structure. The fan blade has a front edge, a top edge, a rear edge, and a bottom edge. The top edge and the bottom edge are fixed to the top ring and the bottom disc, respectively. The top edge and the top ring define an upper connection line, and the bottom edge and the bottom disc define a lower connection line. When viewed from above, the upper and lower connection lines intersect, and a portion of the fan blade is joined with the upper and lower connection lines so as to form a contour line.