Compressor Terminal Guard Insulating Member Design
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Solution Overview
Problem
Conventional compressors face the risk of short circuits due to water entering the terminal cover and contacting the terminal, which is exacerbated by protrusions on the gasket that allow external water to seep inside.
Innovation Solution
A compressor design featuring a terminal guard with an insulating member that covers the inner surface of the side wall and a through hole with an insulating glass portion, reducing the likelihood of the terminal rod contacting the side wall or body section, thereby minimizing the risk of short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a protrusion is provided on the gasket to extend along the peripheral edge, then the gasket can be securely positioned between the casing and terminal cover, but water is retained on the apical end surface of the protrusion and can enter the terminal cover through the gap between the protrusion and side wall
Solution Approach 1:
An insulating member is introduced as an intermediary element between the terminal rod and the terminal guard side wall. This insulating member prevents direct contact and blocks water pathways, thereby eliminating the harmful effect of water intrusion while maintaining the structural positioning function
Solution Approach 2:
The insulating function is extracted from the metal terminal guard structure and implemented as a separate insulating member. This separation allows the terminal guard to maintain its mechanical positioning role while the insulating member specifically addresses the water intrusion and electrical insulation requirements
2Strength
If the terminal guard is made of metal to provide structural strength, then the terminal guard can surround and protect the terminal, but the terminal rod may contact the metal side wall causing a short circuit
Solution Approach 1:
An insulating member is positioned between the terminal rod and the metal terminal guard side wall, serving as an intermediary that prevents direct electrical contact. This mediator maintains the structural integrity of the metal terminal guard while ensuring electrical insulation and preventing short circuits
Solution Approach 2:
The terminal guard assembly becomes a composite structure combining metal (for structural strength) and insulating materials (for electrical insulation). The metal terminal guard provides mechanical protection and positioning, while the insulating member provides electrical isolation, creating a multi-material system that satisfies both strength and insulation requirements
Data Source
AI summary
A compressor includes a casing, a terminal provided to the casing, a terminal guard and an insulating member. The terminal includes a body section and a terminal rod inserted through the body section. The terminal guard is provided outside the casing to surround the terminal. The terminal guard includes a side wall facing the terminal rod in a radial direction. The insulating member is disposed inside the terminal guard. The insulating member includes a bottom section covering an area around the body section, and a side section integrally provided in an erected manner on a peripheral edge portion of the bottom section. The side section covers an inner surface of the side wall of the terminal guard.