Outer rotor motor

Solution Overview

Problem

Large outer rotor motors used in high-capacity 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 frame with a stator, coil, rotating shaft, cover, and magnet, featuring a fan bracket and blades that extend radially and axially to enhance heat dissipation without separate cooling components, simplifying the fastening structure and reducing part count.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If cooling wheels, fans, and flow guides are added for heat dissipation, then heat dissipation efficiency is improved, but device complexity and part quantity increase

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidfastening structure complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent combines the cooling wheel, fan, and flow guide into a single integrated cover component. The cover includes radially extending fan brackets and axially extending blades that perform both cooling wheel and fan functions simultaneously, eliminating the need for separate components and simplifying the fastening structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cover is designed as a multi-functional component that simultaneously serves as the cooling wheel, fan, and flow guide. The fan brackets create radial airflow paths while the blades generate axial airflow, allowing one component to perform multiple heat dissipation functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If cooling wheels, fans, and flow guides are added for heat dissipation, then heat dissipation efficiency is improved, but the size of the motor increases

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidmotor size

Core Design Contradiction:

TemperatureVSVolume of moving object

Solution Approach 1:

The patent combines the cooling wheel, fan, and flow guide into a single integrated cover component. The cover includes radially extending fan brackets and axially extending blades that perform both cooling wheel and fan functions simultaneously, eliminating the need for separate components and simplifying the fastening structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The blades are positioned within the radial space defined by the fan brackets, with the maximum radial height of the blades being equal to or less than the radial height of the fan brackets. This nested arrangement allows multiple cooling functions to be achieved within a compact volume.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Temperature

If cooling wheels, fans, and flow guides are added for heat dissipation, then heat dissipation efficiency is improved, but the number of parts increases

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidnumber of parts

Core Design Contradiction:

TemperatureVSQuantity of substance

Solution Approach 1:

The patent combines the cooling wheel, fan, and flow guide into a single integrated cover component. The cover includes radially extending fan brackets and axially extending blades that perform both cooling wheel and fan functions simultaneously, eliminating the need for separate components and simplifying the fastening structure.

Inventive Principle:

Principle #5Merging (Combining)

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 increases heat dissipation efficiency, reduces the number of parts, and minimizes the motor's size by eliminating the need for cooling wheels, fans, and flow guides, while maintaining performance.

Implementation Method 1

a stator having a coil wound therein is installed, and a rotor is disposed on the outside of the stator as if a magnet surrounds the coil of the stator

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

a plurality of blades extending in an axial direction at the radially outer surface of the cover

Methodology Applied

Scientific EffectFluid flow:

Data Source

PatentUS20230100753A1Outer rotor motor

Publication Date: 2023.03.30 LG ELECTRONICS INC

AI summary

An outer rotor motor includes 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. 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.