Axial Fan Blade Geometry for Lower-Power Heat Exchange
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Solution Overview
Problem
Transport climate control systems face inefficiencies in heat exchange between the climate-controlled space and ambient air, leading to higher power requirements without corresponding improvements in air blowing efficiency.
Innovation Solution
An axial fan with customized blade parameters, including specific chord lengths, sickle percentages, and pitches, is designed to operate at lower speeds while maintaining air blowing efficiency, achieved through a one-piece injection molding process that allows for efficient airflow and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional axial fan designs are used, then power requirements are high, but air blowing efficiency does not improve correspondingly
Solution Approach 1:
The patent applies parameter changes by optimizing blade geometry parameters including chord length distribution, sickle percentage, and pitch angle. The blade chord length varies from 80mm at the root to 110mm at the tip, with a sickle percentage of +62.5% and pitch of 119°, creating an optimized airflow pattern that improves efficiency while reducing power consumption
Solution Approach 2:
The patent implements dynamics through the overlapping blade configuration where the leading edge of each blade overlaps the trailing edge of the preceding blade. This dynamic airflow pattern creates continuous air movement and reduces turbulence, improving air blowing efficiency without requiring higher power input
2Productivity
If blade parameters are customized for optimal performance, then air blowing efficiency improves, but manufacturing complexity increases
Solution Approach 1:
The patent merges the hub and multiple blades into a single one-piece component produced by injection molding. This consolidation eliminates separate manufacturing and assembly steps for the hub-blade interface, reducing manufacturing complexity while maintaining the customized blade parameters needed for optimal air blowing efficiency
Solution Approach 2:
The injection molding process enables precise control of complex blade parameters including chord length variation, sickle percentage, and pitch angle. This manufacturing method accommodates the customized geometry required for high efficiency while simplifying the production process through single-step molding
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 axial fan design reduces power requirements while maintaining or exceeding the efficiency of traditional implementations, offering a more energy-efficient solution for heat exchange in transport climate control systems.
Implementation Method 1
multiple blades stemming from the hub, wherein each of the multiple blades is characterized by having a leading edge and a trailing edge, wherein, from a front view of the axial fan relative to a stacking plane that extends from a center of the hub to a leading edge of the respective blade, the leading edge of a respective one of the blades overlaps a trailing edge of a preceding blade
Data Source
AI summary
A condenser fan includes a lock hub and multiple blades that are fastened to the hub. Each of the blades includes six planes, each of which having variable parameters including pitch angle, sickle, chord length, and blade curve. For each embodiment of the evaporator fan, the blades are identically configured.