Motor Cooling Chamber Design for Compact Heat Dissipation
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Solution Overview
Problem
The existing cooling devices for motors become large due to the need for a large condenser to handle increased liquid refrigerant evaporation as the temperature of the object being cooled rises, leading to a bulky motor assembly.
Innovation Solution
A motor design featuring a sealed chamber filled with a first cooling medium between the housing and rotor, with an inner chamber housing coils and outer chambers that extend circumferentially, allowing for efficient heat dissipation and circulation of the cooling medium, which acts as both a coolant and condenser, eliminating the need for a separate large condenser.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large condenser is used to handle increased liquid refrigerant evaporation from high-temperature objects, then the cooling capacity is improved, but the motor size becomes excessively large
Solution Approach 1:
The patent merges the condenser function with the motor housing structure. The housing serves dual purposes: as the motor casing and as the condenser chamber where refrigerant condensation occurs. This integration eliminates the need for a separate large condenser component, thereby maintaining compact motor size while achieving adequate cooling capacity.
Solution Approach 2:
The housing is designed to perform multiple functions simultaneously: mechanical protection of internal components, structural support, and thermal management through condensation. By making the housing multi-functional, the patent avoids adding extra components that would increase motor size, while still providing the necessary cooling capacity.
2Productivity
If a separate large condenser is added to the cooling device, then the refrigerant condensation efficiency is improved, but the device complexity increases
Solution Approach 1:
The condensation function is merged into the existing housing structure rather than being implemented as a separate component. The housing interior serves as the condensation chamber, with refrigerant flowing through passages within the housing walls or internal surfaces, thereby achieving condensation efficiency without increasing structural complexity.
Solution Approach 2:
The housing structure itself provides the condensation function through its thermal properties and geometry. The housing materials and internal surface areas are designed to facilitate heat transfer and refrigerant condensation, allowing the structure to serve its own thermal management needs without requiring additional dedicated condensation components.
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 design enhances cooling efficiency while preventing the motor from becoming excessively large, as the cooling medium circulates and condenses within the motor, effectively managing heat without requiring a large condenser, thus maintaining compactness.
Implementation Method 1
A sealed chamber hermetically sealed and filled with a first cooling medium is provided between the housing and the rotor
Implementation Method 2
the cooling medium circulates and condenses within the motor, effectively managing heat
Implementation Method 3
the cooling medium circulates and condenses within the motor
Data Source
AI summary
A motor includes a rotor, a stator having a cylindrical shape, disposed on a radial-direction outer side of the rotor, and surrounding the rotor, and a housing having a cylindrical shape, disposed on the radial-direction outer side of the stator, and housing the rotor and the stator. The stator includes teeth disposed along a circumferential direction and extending in a radial direction, and coils wound around the teeth. A hermetically sealed chamber filled with a cooling medium is provided between the housing and the rotor. A space housing the rotor core is provided on a radial-direction inner side of the sealed chamber that includes an inner chamber housing the coils, outer chambers disposed on the radial-direction outer side of the inner chamber and extend in the circumferential direction, and upper and lower connection portions located vertically above or below a shaft and connect the inner chamber to the outer chambers.