Motor Unit Thermal Management via Integrated Air Duct

The patent converts the harmful heat generated by the motor unit into a beneficial cooling effect by directing it through the air duct to the centrifugal fan. The motor case is designed with a built-in air duct that guides the heat-generating air from the motor unit to the fan, where it is discharged to provide cooling. This transforms the waste heat into a useful cooling resource, resolving the contradiction between increased output and heat generation.

The motor case is designed to serve multiple functions: it houses the motor components (rotor, stator, circuit board) and simultaneously acts as a heat dissipation system through its integrated air duct. The air duct structure within the motor case enables the case to function both as a structural housing and as an active thermal management system, allowing the motor unit to handle higher outputs while maintaining acceptable temperature levels.

The motor unit utilizes its own generated heat to provide cooling for the centrifugal fan and surrounding components. The air duct system is designed to circulate the heat-generating air from the motor unit through the fan area, allowing the system to cool itself using its own waste heat. This self-service approach eliminates the need for additional active cooling systems or expensive high-heat-resistant materials, reducing manufacturing costs while maintaining effective heat dissipation.

The patent changes the thermal management approach from passive heat resistance (using high-heat-resistant materials) to active heat utilization (directing heat flow through the air duct system). By modifying the air flow parameters and thermal pathways within the motor case, the system achieves effective heat dissipation using standard materials, avoiding the need for expensive high-heat-resistant components and simplifying manufacturing.