Electric compressor
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Solution Overview
Problem
Existing electric compressors face challenges in enhancing the rigidity of the support plate without increasing its thickness, particularly when using natural refrigerants like carbon dioxide or propane gas, as it is difficult to integrate a sintered glass insulator with thicker support plates during manufacturing.
Innovation Solution
The solution involves using a reinforcing plate made of metal, which is fastened to the support plate using bolts, enhancing its rigidity without increasing the thickness of the support plate, and incorporating a sintered glass insulator for electrical insulation between the conductive member and the support plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the support plate is increased to enhance rigidity, then the rigidity of the support plate is improved, but it becomes difficult to provide a sintered glass insulator between the support plate and the conductive member during manufacturing
Solution Approach 1:
The support structure is segmented into two separate plates: the support plate (which maintains original thickness for insulator installation) and the reinforcing plate (which provides additional rigidity). This segmentation resolves the contradiction by allowing the support plate to remain thin and manufacturable while the reinforcing plate compensates for rigidity requirements.
2Strength
If the thickness of the support plate is increased to enhance rigidity, then the rigidity of the support plate is improved, but the manufacturing efficiency is reduced
Solution Approach 1:
By segmenting the support structure into separate support plate and reinforcing plate components, each can be manufactured independently using optimized processes. The support plate can be produced with standard thickness for efficient insulator installation, while the reinforcing plate is separately manufactured and attached, overall improving manufacturing efficiency compared to producing a single thick plate.
3Strength
If the thickness of the support plate is increased to enhance rigidity, then the rigidity of the support plate is improved, but the assembly complexity increases
Solution Approach 1:
The segmentation into separate support plate and reinforcing plate with standardized fastening interfaces actually reduces assembly complexity compared to manufacturing and handling a single thick plate. Each component can be prepared independently with precise mounting features, making the assembly process more systematic and less complex than alternative approaches.
Data Source
AI summary
An electric compressor includes: a housing; a compression mechanism accommodated in the housing and configured to compress a fluid; a motor accommodated in the housing and configured to drive the compression mechanism; an inverter accommodated in the housing and configured to drive the motor; and a hermetic terminal disposed in the housing, and electrically connecting the motor and the inverter. The hermetic terminal includes: a conductive member made of a conductive material; a support plate having a plate-like shape and made of metal; and an insulator. The support plate supports the conductive member. The insulator provides electrical insulation between the conductive member and the support plate. The electric compressor includes a reinforcing plate having a plate-like shape. The support plate and the reinforcing plate for enhancing rigidity of the support plate are fastened together to the housing by a fastening member.