Motor assembly and cleaner comprising same
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Solution Overview
Problem
Conventional motor assemblies have a limited cooling effect due to air flow primarily passing through the outer side, failing to effectively dissipate heat generated by the motor, which affects performance and lifespan.
Innovation Solution
A motor assembly with a heat dissipation cover that forms bypass flow channels, allowing air to flow adjacently to the motor, comprising an inner cover spaced apart from the stator to create an air intake path and an outer cover with a larger diameter to form an air discharge path, enhancing cooling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air flow passes through the outer side of the motor, then the motor structure is simple, but the cooling effect is insufficient
Solution Approach 1:
The motor assembly is segmented into distinct functional zones: the diffuser handles air intake and initial flow direction, while the heat dissipation cover with its inner and outer covers creates separate flow channels. This segmentation allows optimized cooling pathways without substantially increasing overall structural complexity.
Solution Approach 2:
The heat dissipation cover acts as an intermediary component between the motor stator and the external environment. It mediates the cooling process by creating controlled flow channels that guide air adjacent to the motor, enhancing heat dissipation while maintaining a relatively simple overall structure.
2Temperature
If air flow is directed adjacent to the motor for cooling, then the cooling effect is improved, but the device complexity increases
Solution Approach 1:
The heat dissipation cover integrates multiple functions into a single component: it provides structural coverage for the motor while simultaneously creating cooling flow channels. The inner cover and outer cover are merged with the diffuser housing to form integrated airflow pathways, reducing the need for separate cooling system components.
Solution Approach 2:
The diffuser structure serves multiple purposes: it directs air intake into the system, guides air along the outer surface of the housing, and works in conjunction with the heat dissipation cover to create cooling channels. This multi-functionality reduces the need for additional dedicated cooling components.
3Temperature
If the heat dissipation cover is spaced apart from the stator, then air flow channel is formed for cooling, but the cover size increases
Solution Approach 1:
The cooling flow channels are created in the radial dimension between the inner cover and stator, and between the outer cover and housing, rather than requiring additional axial length. This dimensional approach allows effective cooling channel formation without substantially increasing the overall size of the heat dissipation cover.
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
The design improves cooling efficiency by creating a flow path for air to flow directly adjacent to the motor, reducing pressure differences and increasing airflow speed, thereby enhancing motor performance and extending its lifespan.
Implementation Method 1
The motor is cooled through a flow of air that is generated by a rotation of the impeller... wind generated by the impeller mainly passed through the outer side of the motor, and does not flow adjacently to the motor or to the inner side of the motor
Implementation Method 2
an impeller connected to the rotary shaft... the impeller configured to generate a flow of air
Implementation Method 3
heat is generated by currents flowing in a coil of the stator
Data Source
AI summary
A motor assembly has a motor having a rotor and a stator. An impeller is connected to a rotary shaft of the rotor and a housing is disposed between the impeller and the motor and surrounding an upper side of the motor. A diffuser discharges air, which is suctioned by the impeller, along an outer surface of the housing. A heat dissipation cover covers an outer surface of the motor. The heat dissipation cover includes an inner cover spaced apart from the outer surface of the motor and forming an inside-cover flow channel that air flows through and an outer cover having a diameter greater than that of the inner cover and forming an outside-cover flow channel through which air flows along the outer surface thereof.