Wind-Driven Roller Cooling for Electromotor Heat Dissipation
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Solution Overview
Problem
Conventional heat dissipating devices for electromotors, whether air-cooling or liquid-cooling, face inefficiencies due to reliance on ambient conditions and power-consuming fans or pumps, which can lead to overheating and increased costs.
Innovation Solution
A composite heat dissipating device that combines air cooling and liquid cooling using a roller with a sealed chamber and outer blades, where the roller is rotated by wind force to continuously change the contact position with fresh air, allowing for efficient heat transfer without additional power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If air cooling with heat dissipating fins is used, then heat dissipation area is increased, but heat dissipation efficacy is insufficient under undesirable ambient conditions
Solution Approach 1:
The patent combines air cooling and liquid cooling into a hybrid system. The roller rotates to perform both functions: outer blades contact air for cooling while inner blades contact liquid coolant, merging two cooling methods into one integrated device that overcomes the limitations of pure air cooling.
Solution Approach 2:
The roller is designed to rotate dynamically, allowing the blades to continuously contact fresh air and liquid coolant. This dynamic rotation enables the system to actively seek optimal cooling conditions rather than relying passively on ambient conditions, improving heat dissipation efficacy.
2Temperature
If a heat dissipating fan is added to improve cooling, then temperature is reduced, but power consumption and heat generation increase
Solution Approach 1:
The roller is designed to rotate automatically using the electromotor's own operation or ambient conditions, without requiring an external power source. The system serves itself by utilizing the electromotor's operational environment to drive the cooling mechanism, eliminating additional power consumption.
Solution Approach 2:
The system converts the heat generated by the electromotor into a beneficial force that drives the roller rotation, which in turn enhances the cooling process. The harmful heat becomes the driving energy for the cooling mechanism.
3Reliability
If liquid cooling with electric pump is used, then heat dissipation performance is improved, but device complexity and cost increase
Solution Approach 1:
The liquid cooling system is designed to circulate coolant automatically without requiring an external electric pump. The roller's rotation and the system's gravitational or pressure-driven flow enable self-circulation, eliminating the need for complex pumping apparatus.
Solution Approach 2:
The roller serves multiple functions simultaneously: it acts as a support bearing, a rotating blade for air cooling, and a driving element for liquid coolant circulation. This multi-functionality eliminates the need for separate pumping apparatus while maintaining effective liquid cooling.
4Reliability
If liquid cooling with electric pump is used, then heat dissipation performance is improved, but power consumption increases
Solution Approach 1:
The liquid cooling system circulates coolant without requiring external power input. The roller's rotation and system design enable automatic coolant circulation through gravitational force, pressure differential, or the electromotor's operational environment, eliminating additional power consumption.
5Reliability
If liquid cooling with electric pump is used, then heat dissipation performance is improved, but equipment space is occupied
Solution Approach 1:
The roller integrates multiple functions into a single component: it provides structural support as a bearing, performs air cooling through outer blades, and drives liquid coolant circulation through inner blades. This eliminates the need for separate pumping apparatus and heat dissipating devices, reducing equipment space occupation.
Solution Approach 2:
The patent merges air cooling and liquid cooling systems into a single integrated roller device, combining what would traditionally be separate components into one unified structure, thereby reducing the overall space required for cooling systems.
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 solution effectively reduces heat dissipation time and enhances cooling efficiency by utilizing wind-driven rotation to circulate cooling liquid and air, addressing the inefficiencies of traditional methods while minimizing power usage and costs.
Implementation Method 1
the outer blade of the roller can be effectively rotated by the wind force without requiring additional power
Implementation Method 2
a cooling liquid can be injected to the chamber, the chamber covers a surface of the casing
Implementation Method 3
An inner blade is used to continuously take the liquid contacting the heat source away from the heat source, and bring the liquid at lower temperature to contact the heat source
Data Source
AI summary
A heat dissipating device of an electromotor is a composite cooling device driven in a powerless manner and used for stirring a cooling liquid applied on a surface of a casing of the electromotor. The heat dissipating device includes a pair of bearings fitted on the casing, and a roller disposed at outer ring seats of the pair of bearings. The roller has a sealed chamber therein, the chamber covers a surface of the casing located in a disposition region of the bearings, and at least one outer blade is disposed outside the roller. Thereby, composite heat dissipating of liquid cooling and air cooling of the electromotor is implemented with a cooling liquid injected into the chamber of the roller and a wind force applied on the outer blade.