Stator Unit Stepped Housing Resin Waterproofing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor stator designs face challenges in water-proofing, as water can still penetrate through the interface between the housing and the resin covering the stator, leading to corrosion issues despite resin coverage.
Innovation Solution
The stator unit incorporates an annular stator with a housing featuring stepped portions on its bottom and inner sides, which are covered with resin, increasing the contact area and distance for moisture intrusion prevention, thereby enhancing water-proofing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stator is covered with resin to prevent water entry, then water-proofing is improved, but water can still penetrate through the interface between the housing and resin, causing corrosion
Solution Approach 1:
The patent introduces stepped portions that create multiple levels in the interface structure, transforming a single-plane interface into a multi-level structure. This increases the path length and complexity for water penetration, effectively addressing the water-proofing issue by adding dimensional complexity to the interface geometry
Solution Approach 2:
The interface between the housing and resin is segmented into multiple stepped portions rather than being a continuous single interface. This segmentation creates multiple barriers that water must overcome, preventing direct penetration paths and improving overall water-proofing effectiveness
2Ease of manufacture
If the interface between housing and resin is simplified, then manufacturing is easier, but water can penetrate more easily causing corrosion
Solution Approach 1:
By introducing stepped portions that create vertical levels in the interface, the patent adds dimensional complexity without requiring multiple separate components. This maintains manufacturing simplicity while significantly improving water-proofing through the multi-level barrier structure
Data Source
AI summary
In a fan motor, a stator unit of a motor that rotates an impeller includes an annular stator, the center of which is positioned on a central axis, and a housing including an accommodating portion that accommodates a part of a resin portion covering at least a part of the stator. At least one of a bottom face of the accommodating portion oriented to the stator in the axial direction and an inner side face of the accommodating portion oriented to an inner side in the radial direction is provided with a plurality of stepped portions. The stepped portions are different from each other in length in the axial direction when provided in the bottom face, and/or in length in the radial direction when provided in the inner side face. The bottom face, the inner side face, and the stepped portion are covered with the resin portion.