Mistake-proof electrical connectors for HVAC systems
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Solution Overview
Problem
HVAC system compressors face issues with incorrect electrical connector alignment due to symmetrically distributed terminal posts, leading to potential damage or reduced efficiency, as traditional connectors do not prevent incorrect installation orientations.
Innovation Solution
The development of a mistake-proof electrical connector with radially extending interference projections that physically interfere with the compressor's positioning guide, ensuring correct alignment and preventing incorrect assembly orientations, leveraging 'poka-yoke' techniques to guarantee proper power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional electrical connectors with symmetrically distributed connectors are used, then the connectors can be easily manufactured and assembled, but they can be aligned with terminal posts in multiple positions leading to incorrect power supply
Solution Approach 1:
The patent applies asymmetry by adding interference projections to the electrical connector that create an asymmetric configuration relative to the terminal posts. This asymmetric design ensures that the connector can only be properly aligned in one specific orientation, preventing incorrect power supply connections while maintaining ease of assembly through the self-aligning interference fit mechanism
2Reliability
If interference projections are added to prevent incorrect alignment, then reliability of power supply is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the electrical connector into distinct functional elements: the plug body, individual interference projections, and connector elements. This segmentation allows each component to serve a specific purpose while maintaining overall simplicity, where the interference projections are separate features that can be independently designed and manufactured
3Ease of operation
If multiple alignment orientations are possible, then ease of assembly is improved, but risk of incorrect installation and potential damage increases
Solution Approach 1:
The patent applies preliminary anti-action by incorporating interference projections that proactively prevent incorrect alignment before installation is completed. These projections create physical interference that blocks incorrect orientations from being established, thereby preventing potential damage before it can occur while still allowing easy assembly in the correct orientation
Data Source
AI summary
An electrical connector for a compressor of an HVAC system includes electrical leads and a plug communicatively coupled to the electrical leads. The plug includes a plug body and first connectors configured to electrically couple the electrical leads to second connectors of the compressor via engagement of the first connectors with the second connectors. The first connectors are symmetrically distributed on the plug body such that the first connectors can align with the second connectors in a plurality of alignment orientations of the first connectors and the second connectors. The plug also includes at least one interference projection radially extending from a periphery of the plug body. The at least one interference projection is configured to physically interfere with a positioning guide of the compressor and block engagement between the first connectors and the second connectors in all except for one alignment orientation of the plurality of alignment orientations.