Outer Rotor Motor with Integrated Cooling Blades to Reduce Part Count
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Solution Overview
Problem
Existing outer rotor motors for large air conditioners have complex fastening structures and a large number of parts, including cooling wheels, fans, and flow guides, which increase size and complexity.
Innovation Solution
The design incorporates a fan bracket and blades projecting radially and axially from the cover, eliminating the need for separate cooling components by enhancing heat dissipation through fluid flow between the fan bracket and frame, thereby simplifying the fastening structure and reducing part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If separate cooling components (cooling wheel, cooling fan, flow guide) are used for heat dissipation, then heat dissipation function is achieved, but the number of parts increases and fastening structure becomes complicated
Solution Approach 1:
The patent integrates the cooling fan blades directly into the rotor structure, merging the motor rotor and cooling fan into a single integrated component. This eliminates the need for separate cooling wheels, cooling fans, and flow guides, thereby reducing the number of parts and simplifying the fastening structure while maintaining effective heat dissipation through the integrated blade design
Solution Approach 2:
The rotor is designed to serve dual functions: generating rotational motion for the motor and providing cooling through integrated blades. The same rotational motion that drives the motor also drives the cooling blades, creating multi-functional operation where one component performs both propulsion and thermal management tasks
2Temperature
If multiple separate cooling components are used, then cooling function is provided, but the size of the motor increases
Solution Approach 1:
By merging the cooling fan blades with the rotor structure, the patent eliminates the need for separate cooling components that would occupy additional space. The integrated design allows the cooling function to be achieved within the existing motor footprint, reducing the overall motor size compared to configurations with separate cooling wheels, fans, and flow guides
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 reduces the number of parts and size of the outer rotor motor while improving heat dissipation performance, specifically by generating fluid flow between the fan bracket and frame, thus enhancing convection and reducing output loss.
Implementation Method 1
generating fluid flow between the fan bracket and frame, thus enhancing convection and reducing output loss
Data Source
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AI summary
An outer rotor motor is provided. The outer rotor motor according to an aspect of the present disclosure may comprise a frame, a stator disposed on the frame, a coil disposed on the stator, a rotating shaft rotatably coupled to a central region of the frame, a cover coupled to the rotating shaft and surrounding the stator, and a magnet disposed on the cover and facing the stator. In this case, the cover may include a fan bracket projecting in a radial direction from a radially outer surface, and a plurality of blades extending in an axial direction from the radially outer surface.