Electric Compressor Lead Wire Protection Against Lubricant Hydrolysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electric compressors, the lead wires connected to the coil portions can be damaged by hydrolysis due to moisture in the lubricant, leading to potential short circuits.
Innovation Solution
The electric compressor incorporates a protective member, such as a protective tube made of resin, that surrounds the electrical lead only in the area where it is immersed in the lubricant, preventing direct contact and thus protecting the lead wire from hydrolysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lead wire is immersed in the lubricant for electrical connection, then the electrical connection is achieved, but the covering portion made of resin is damaged by hydrolysis due to moisture in the lubricant
Solution Approach 1:
The patent introduces a protective tube as an intermediary component between the lead wire and the lubricant. This protective tube prevents direct contact between the resin covering of the lead wire and the moisture-containing lubricant, thereby eliminating the hydrolysis damage while maintaining the electrical connection function. The protective tube acts as a mediator that allows the lead wire to remain electrically connected without being exposed to harmful moisture.
2Object-affected harmful factors
If a protective member surrounds the entire circumference of the electrical lead, then the protection from moisture is improved, but the insulation distance to other members may be compromised
Solution Approach 1:
The patent applies local quality by providing the protective tube only in specific areas where the lead wire is exposed to moisture, rather than surrounding the entire circumference uniformly. The protective tube is strategically positioned in regions where moisture contact occurs, while maintaining adequate insulation distance in other areas. This localized approach ensures moisture protection where needed without compromising the insulation distance to other components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents damage to the resin covering of the lead wires, thereby avoiding short circuits and ensuring an appropriate insulation distance between the lead wires and other components.
Implementation Method 1
a covering portion made of a resin of a lead wire immersed in the lubricant may be damaged by hydrolysis
Data Source
AI summary
Provided is an electric compressor which comprises a housing, a compressor for compressing a refrigerant including lubricating oil, and a motor which rotationally drives the compressor, wherein: the motor comprises a stator, a rotor, a plurality of lead wires connected to a plurality of coil portions, and protecting tubes which are arranged in such a way as to surround the entire circumference of the lead wires, and which protect the lead wires from moisture contained in the lubricating oil, the lead wires are coated with a resin coating portion and are arranged in a circumferential direction around an axis; and the protecting tubes are arranged only in a protection area in a portion of the circumferential direction including an area in which the lead wires are immersed in the lubricating oil stored in an internal space of the housing.