Electric Compressor Inverter Control Board Connection
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Solution Overview
Problem
Conventional electric compressors with inverter circuit sections have weak connection strengths due to screw-fixed filter mold assemblies, necessitating an improvement in the connection between the inverter circuit and electric circuit sections.
Innovation Solution
An electric compressor design featuring a resin-molded sleeve assembly with a male screw and screw groove portion, allowing for a highly rigid connection between the inverter control board and the electric circuit section using a nut, and integrating the inverter circuit section with a filter circuit section for enhanced rigidity and easier assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If connection terminals are fixed with screws, then assembly is simple, but connection strength is weak
Solution Approach 1:
The patent merges the connection terminal and the inverter control board into a single integrated structure. The connection terminal is formed as an integral part of the inverter control board, eliminating the need for separate screw fixation and achieving both strong connection and structural simplicity.
Solution Approach 2:
The inverter control board serves multiple functions: it acts as both the control circuit carrier and the connection terminal for the filter circuit section. This multi-functionality eliminates the need for separate connection components while maintaining strong electrical and mechanical connections.
2Volume of moving object
If inverter circuit section volume is reduced, then space efficiency improves, but connection reliability may deteriorate
Solution Approach 1:
By integrating the connection terminal into the inverter control board, the patent reduces the overall volume of the inverter circuit section while ensuring reliable connections through the unified structure. The integration eliminates gaps and weak points that would exist with separate components.
3Reliability
If filter circuit section height is increased, then filtering performance improves, but assembly difficulty increases
Solution Approach 1:
The patent segments the inverter circuit section and filter circuit section as separate but integrally connected components. The connection terminal on the inverter control board provides a standardized interface that simplifies assembly of the taller filter circuit section while maintaining filtering performance.
Data Source
AI summary
There is provided an electric compressor in which the connection strength between an inverter circuit section and an electrical circuit section connected thereto by a connection terminal is improved. An inverter circuit section (3) includes an inverter control board (17) and a resin-molded sleeve assembly (18). In the sleeve assembly, a sleeve (32) and a terminal connection portion (23) are integrally resin-molded in a state in which a screw groove portion is protruded. The inverter control board (17) and a filter side connection terminal (71) of a filter circuit section (4) are fastened together to the terminal connection portion with a nut (92) screwed into the screw groove portion, whereby the inverter control board 17 and the filter circuit section 4 are electrically connected.