Electric Compressor Pin Arrangement for Sealing Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-pressure refrigerants in electric compressors pose a risk of excessive stress on the housing, leading to deformation and potential refrigerant leakage due to the conventional parallel arrangement of electrical connection pins, which complicates sealing and increases production costs.
Innovation Solution
The electric compressor features a stator assembly with electrical connection pins arranged in a triangular pattern on a partition within the housing, supported by a mounting plate and a cover, utilizing a fixing unit with bolts to secure the mounting plate and prevent deformation, ensuring reliable sealing even under high pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three electrical connection pins are disposed parallel to each other around a stator, then electrical connection is achieved, but excessively high stress is applied to regions between the through holes causing housing deformation and refrigerant leakage
Solution Approach 1:
The patent changes the arrangement of electrical connection pins from a parallel linear configuration to a triangular configuration. This asymmetric distribution spreads the stress points more evenly across the housing structure, preventing excessive stress concentration in specific regions between through holes, thereby maintaining housing strength and sealing performance under high pressure
Solution Approach 2:
The patent transitions from a one-dimensional parallel arrangement of pins to a two-dimensional triangular arrangement. By distributing the pins in a triangular pattern rather than parallel lines, the stress is dispersed across a larger area and different spatial dimensions, reducing the likelihood of housing deformation and leakage
2Strength
If the housing is reinforced by changing material or increasing thickness to avoid deformation, then housing strength is improved, but production cost and product weight increase
Solution Approach 1:
Instead of uniformly reinforcing the entire housing structure, the patent applies a localized solution by changing only the pin arrangement configuration. This targeted approach addresses the stress distribution problem at specific critical points (through hole regions) without requiring global structural reinforcement, thereby avoiding increased material costs and product weight
3Ease of manufacture
If a single large through hole is formed with a mounting plate to simplify assembly, then manufacturing is simplified, but the mounting plate may be removed from correct position under high pressure reducing reliability
Solution Approach 1:
The triangular arrangement of pins on the mounting plate creates an asymmetric, geometrically stable configuration. This triangular pattern provides inherent structural stability that resists displacement under high pressure, while still allowing for simplified single-hole mounting. The asymmetric distribution prevents the mounting plate from shifting out of position better than a symmetric or linear arrangement would
Data Source
AI summary
Disclosed herein is an electric compressor having an electrical connection unit. The electric compressor may include: a compression unit configured to compress working fluid; an electrically-driven unit configured to drive the compression unit, and including a stator fixed in an inner surface of a housing, and a rotor rotatably disposed inside the stator; the housing including a partition provided to define a space in which the electrically-driven unit is received; a plurality of electrical connection pins connected electrically to the electrically-driven unit, and disposed through the partition in a longitudinal direction of the housing; and a controller disposed on a rear surface of the partition.